fix: replace tracing-android with android_logger (no sharded_slab SIGSEGV)

tracing_subscriber::registry() allocates a sharded_slab which causes
SIGSEGV on Android 16 MTE devices during nativeInit. catch_unwind
can't catch SIGSEGV (it's a signal, not a panic).

Replace with android_logger (lightweight, no large allocations) +
tracing-log bridge so tracing::info! macros still work via logcat.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.agents/skills/caveman/SKILL.md

@@ -1,72 +0,0 @@
----
-name: caveman
-description: >
-  Ultra-compressed communication mode. Slash token usage ~75% by speaking like caveman
-  while keeping full technical accuracy. Use when user says "caveman mode", "talk like caveman",
-  "use caveman", "less tokens", "be brief", or invokes /caveman. Also auto-triggers
-  when token efficiency is requested.
----
-
-# Caveman Mode
-
-## Core Rule
-
-Respond like smart caveman. Cut articles, filler, pleasantries. Keep all technical substance.
-
-## Grammar
-
-- Drop articles (a, an, the)
-- Drop filler (just, really, basically, actually, simply)
-- Drop pleasantries (sure, certainly, of course, happy to)
-- Short synonyms (big not extensive, fix not "implement a solution for")
-- No hedging (skip "it might be worth considering")
-- Fragments fine. No need full sentence
-- Technical terms stay exact. "Polymorphism" stays "polymorphism"
-- Code blocks unchanged. Caveman speak around code, not in code
-- Error messages quoted exact. Caveman only for explanation
-
-## Pattern
-
-```
-[thing] [action] [reason]. [next step].
-```
-
-Not:
-> Sure! I'd be happy to help you with that. The issue you're experiencing is likely caused by...
-
-Yes:
-> Bug in auth middleware. Token expiry check use `<` not `<=`. Fix:
-
-## Examples
-
-**User:** Why is my React component re-rendering?
-
-**Normal (69 tokens):** "The reason your React component is re-rendering is likely because you're creating a new object reference on each render cycle. When you pass an inline object as a prop, React's shallow comparison sees it as a different object every time, which triggers a re-render. I'd recommend using useMemo to memoize the object."
-
-**Caveman (19 tokens):** "New object ref each render. Inline object prop = new ref = re-render. Wrap in `useMemo`."
-
----
-
-**User:** How do I set up a PostgreSQL connection pool?
-
-**Caveman:**
-```
-Use `pg` pool:
-```
-```js
-const pool = new Pool({
-  max: 20,
-  idleTimeoutMillis: 30000,
-  connectionTimeoutMillis: 2000,
-})
-```
-```
-max = concurrent connections. Keep under DB limit. idleTimeout kill stale conn.
-```
-
-## Boundaries
-
-- Code: write normal. Caveman English only
-- Git commits: normal
-- PR descriptions: normal
-- User say "stop caveman" or "normal mode": revert immediately

.gitignore

@@ -4,28 +4,3 @@
 *.swp
 *.swo
 *~
-
-# Logs
-logs
-*.log
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-dev-debug.log
-# Dependency directories
-node_modules/
-# Environment variables
-.env
-# Editor directories and files
-.idea
-.vscode
-*.suo
-*.ntvs*
-*.njsproj
-*.sln
-*.sw?
-# OS specific
-
-# Taskmaster (local workflow tool)
-.taskmaster/
-.env.example

Cargo.toml

@@ -10,8 +10,6 @@ members = [
     "crates/wzp-client",
     "crates/wzp-web",
     "crates/wzp-android",
-    "crates/wzp-native",
-    "desktop/src-tauri",
 ]
 
 [workspace.package]
@@ -37,19 +35,12 @@ quinn = "0.11"
 raptorq = "2"
 
 # Codec
-# opusic-c: high-level safe bindings over libopus 1.5.2 (encoder side).
+audiopus = "0.3.0-rc.0"
-# opusic-sys: raw FFI for the decoder side — we build our own DecoderHandle
-# because opusic-c::Decoder.inner is pub(crate) and cannot be reached for the
-# Phase 3 DRED reconstruction path. See docs/PRD-dred-integration.md.
-# Pinned exactly (no caret) for reproducible libopus 1.5.2 across the fleet.
-opusic-c = { version = "=1.5.5", default-features = false, features = ["bundled", "dred"] }
-opusic-sys = { version = "=0.6.0", default-features = false, features = ["bundled"] }
-bytemuck = "1"
 codec2 = "0.3"
 
 # Crypto
 x25519-dalek = { version = "2", features = ["static_secrets"] }
-ed25519-dalek = { version = "2", features = ["rand_core", "pkcs8"] }
+ed25519-dalek = { version = "2", features = ["rand_core"] }
 chacha20poly1305 = "0.10"
 hkdf = "0.12"
 sha2 = "0.10"
@@ -62,29 +53,3 @@ wzp-fec = { path = "crates/wzp-fec" }
 wzp-crypto = { path = "crates/wzp-crypto" }
 wzp-transport = { path = "crates/wzp-transport" }
 wzp-client = { path = "crates/wzp-client" }
-
-# Fast dev profile: optimized but with debug info and incremental compilation.
-# Use with: cargo run --profile dev-fast
-[profile.dev-fast]
-inherits = "dev"
-opt-level = 2
-
-# Optimize heavy compute deps even in debug builds —
-# real-time audio needs < 20ms per frame, impossible unoptimized.
-[profile.dev.package.nnnoiseless]
-opt-level = 3
-[profile.dev.package.opusic-sys]
-opt-level = 3
-[profile.dev.package.raptorq]
-opt-level = 3
-[profile.dev.package.wzp-codec]
-opt-level = 3
-[profile.dev.package.wzp-fec]
-opt-level = 3
-
-# Phase 0 (opus-DRED): removed the [patch.crates-io] audiopus_sys = { path =
-# "vendor/audiopus_sys" } block. That patch existed to fix a Windows clang-cl
-# SIMD compile bug in libopus 1.3.1. With the swap to opusic-sys (libopus
-# 1.5.2), the upstream SIMD gating was fixed and the vendor patch is
-# obsolete. The vendor/audiopus_sys directory itself should be deleted as
-# part of the same cleanup — see the commit that follows this Phase 0.

android/app/src/main/java/com/wzp/audio/AudioPipeline.kt

@@ -57,7 +57,7 @@ class AudioPipeline(private val context: Context) {
     /** Whether to attach hardware AEC. Must be set before start(). */
     var aecEnabled: Boolean = true
     /** Enable debug recording of PCM + RMS histogram to cache dir. */
-    var debugRecording: Boolean = false
+    var debugRecording: Boolean = true
     private var captureThread: Thread? = null
     private var playoutThread: Thread? = null
 

android/app/src/main/java/com/wzp/data/SettingsRepository.kt

@@ -28,7 +28,6 @@ class SettingsRepository(context: Context) {
         private const val KEY_PREFER_IPV6 = "prefer_ipv6"
         private const val KEY_IDENTITY_SEED = "identity_seed_hex"
         private const val KEY_AEC_ENABLED = "aec_enabled"
-        private const val KEY_DEBUG_RECORDING = "debug_recording"
         private const val KEY_RECENT_ROOMS = "recent_rooms"
         private const val TOFU_PREFIX = "tofu_"
     }
@@ -121,16 +120,6 @@ class SettingsRepository(context: Context) {
     fun saveAecEnabled(enabled: Boolean) { prefs.edit().putBoolean(KEY_AEC_ENABLED, enabled).apply() }
     fun loadAecEnabled(): Boolean = prefs.getBoolean(KEY_AEC_ENABLED, true)
 
-    // --- Debug recording ---
-
-    fun saveDebugRecording(enabled: Boolean) { prefs.edit().putBoolean(KEY_DEBUG_RECORDING, enabled).apply() }
-    fun loadDebugRecording(): Boolean = prefs.getBoolean(KEY_DEBUG_RECORDING, false)
-
-    // --- Codec choice ---
-    // 0 = Opus (GOOD), 1 = Opus Low (DEGRADED), 2 = Codec2 (CATASTROPHIC)
-    fun saveCodecChoice(choice: Int) { prefs.edit().putInt("codec_choice", choice).apply() }
-    fun loadCodecChoice(): Int = prefs.getInt("codec_choice", 0)
-
     // --- Identity seed ---
 
     /**
@@ -190,14 +179,4 @@ class SettingsRepository(context: Context) {
     fun loadServerFingerprint(address: String): String? {
         return prefs.getString("$TOFU_PREFIX$address", null)
     }
-
-    // --- Ping RTT cache ---
-
-    fun savePingRtt(address: String, rttMs: Int) {
-        prefs.edit().putInt("ping_rtt_$address", rttMs).apply()
-    }
-
-    fun loadPingRtt(address: String): Int {
-        return prefs.getInt("ping_rtt_$address", -1)
-    }
 }

android/app/src/main/java/com/wzp/debug/DebugReporter.kt

@@ -46,14 +46,6 @@ class DebugReporter(private val context: Context) {
             val zipFile = File(context.cacheDir, "wzp_debug_${timestamp}.zip")
 
             ZipOutputStream(BufferedOutputStream(FileOutputStream(zipFile))).use { zos ->
-                // Phase 4: extract DRED / classical PLC counters from the
-                // stats JSON so they're visible in the meta preamble at a
-                // glance, not buried in the trailing JSON dump.
-                val dredReconstructions = extractLongField(finalStatsJson, "dred_reconstructions")
-                val classicalPlc = extractLongField(finalStatsJson, "classical_plc_invocations")
-                val framesDecoded = extractLongField(finalStatsJson, "frames_decoded")
-                val fecRecovered = extractLongField(finalStatsJson, "fec_recovered")
-
                 // 1. Call metadata
                 val meta = buildString {
                     appendLine("=== WZ Phone Debug Report ===")
@@ -66,18 +58,6 @@ class DebugReporter(private val context: Context) {
                     appendLine("Device: ${android.os.Build.MANUFACTURER} ${android.os.Build.MODEL}")
                     appendLine("Android: ${android.os.Build.VERSION.RELEASE} (API ${android.os.Build.VERSION.SDK_INT})")
                     appendLine()
-                    appendLine("=== Loss Recovery ===")
-                    appendLine("Frames decoded:           $framesDecoded")
-                    appendLine("DRED reconstructions:     $dredReconstructions (Opus neural recovery)")
-                    appendLine("Classical PLC:            $classicalPlc (fallback)")
-                    appendLine("RaptorQ FEC recovered:    $fecRecovered (Codec2 only)")
-                    if (framesDecoded > 0) {
-                        val dredPct = 100.0 * dredReconstructions / framesDecoded
-                        val plcPct = 100.0 * classicalPlc / framesDecoded
-                        appendLine("DRED rate:                ${"%.2f".format(dredPct)}%")
-                        appendLine("Classical PLC rate:       ${"%.2f".format(plcPct)}%")
-                    }
-                    appendLine()
                     appendLine("=== Final Stats ===")
                     appendLine(finalStatsJson)
                 }
@@ -215,28 +195,4 @@ class DebugReporter(private val context: Context) {
         FileInputStream(file).use { it.copyTo(zos) }
         zos.closeEntry()
     }
-
-    /**
-     * Tiny JSON field extractor — pulls an integer value for a top-level
-     * field like `"dred_reconstructions":42`. We don't want to pull in a
-     * full JSON parser just for the debug preamble, and the CallStats
-     * output is a flat record with well-known field names.
-     *
-     * Returns 0 if the field is missing or unparseable.
-     */
-    private fun extractLongField(json: String, field: String): Long {
-        val key = "\"$field\":"
-        val idx = json.indexOf(key)
-        if (idx < 0) return 0
-        var i = idx + key.length
-        // Skip whitespace
-        while (i < json.length && json[i].isWhitespace()) i++
-        val start = i
-        while (i < json.length && (json[i].isDigit() || json[i] == '-')) i++
-        return try {
-            json.substring(start, i).toLong()
-        } catch (_: NumberFormatException) {
-            0
-        }
-    }
 }

android/app/src/main/java/com/wzp/engine/CallStats.kt

@@ -33,24 +33,10 @@ data class CallStats(
     val fecRecovered: Long = 0,
     /** Current mic audio level (RMS, 0-32767). */
     val audioLevel: Int = 0,
-    /** Our current outgoing codec (e.g. "Opus24k"). */
-    val currentCodec: String = "",
-    /** Last seen incoming codec from peers. */
-    val peerCodec: String = "",
-    /** Whether auto quality mode is active. */
-    val autoMode: Boolean = false,
     /** Number of participants in the room. */
     val roomParticipantCount: Int = 0,
     /** Participants in the room (fingerprint + optional alias). */
     val roomParticipants: List<RoomMember> = emptyList(),
-    /** SAS verification code (4-digit, null if not in a call). */
-    val sasCode: Int? = null,
-    /** Incoming call ID (or "relay|room" for CallSetup). */
-    val incomingCallId: String? = null,
-    /** Incoming caller's fingerprint. */
-    val incomingCallerFp: String? = null,
-    /** Incoming caller's alias. */
-    val incomingCallerAlias: String? = null,
 ) {
     /** Human-readable quality label. */
     val qualityLabel: String
@@ -68,8 +54,7 @@ data class CallStats(
                 val o = arr.getJSONObject(i)
                 RoomMember(
                     fingerprint = o.optString("fingerprint", ""),
-                    alias = if (o.isNull("alias")) null else o.optString("alias", null),
+                    alias = if (o.isNull("alias")) null else o.optString("alias", null)
-                    relayLabel = if (o.isNull("relay_label")) null else o.optString("relay_label", null)
                 )
             }
         }
@@ -91,15 +76,8 @@ data class CallStats(
                     underruns = obj.optLong("underruns", 0),
                     fecRecovered = obj.optLong("fec_recovered", 0),
                     audioLevel = obj.optInt("audio_level", 0),
-                    currentCodec = obj.optString("current_codec", ""),
-                    peerCodec = obj.optString("peer_codec", ""),
-                    autoMode = obj.optBoolean("auto_mode", false),
                     roomParticipantCount = obj.optInt("room_participant_count", 0),
-                    roomParticipants = parseParticipants(obj.optJSONArray("room_participants")),
+                    roomParticipants = parseParticipants(obj.optJSONArray("room_participants"))
-                    sasCode = if (obj.has("sas_code")) obj.optInt("sas_code") else null,
-                    incomingCallId = if (obj.isNull("incoming_call_id")) null else obj.optString("incoming_call_id", null),
-                    incomingCallerFp = if (obj.isNull("incoming_caller_fp")) null else obj.optString("incoming_caller_fp", null),
-                    incomingCallerAlias = if (obj.isNull("incoming_caller_alias")) null else obj.optString("incoming_caller_alias", null),
                 )
             } catch (e: Exception) {
                 CallStats()
@@ -110,8 +88,7 @@ data class CallStats(
 
 data class RoomMember(
     val fingerprint: String,
-    val alias: String? = null,
+    val alias: String? = null
-    val relayLabel: String? = null
 ) {
     /** Short display name: alias if set, otherwise first 8 chars of fingerprint. */
     val displayName: String

android/app/src/main/java/com/wzp/engine/WzpEngine.kt

@@ -38,12 +38,9 @@ class WzpEngine(private val callback: WzpCallback) {
      * @param alias     display name sent to relay for room participant list
      * @return 0 on success, negative error code on failure
      */
-    /**
+    fun startCall(relayAddr: String, room: String, seedHex: String = "", token: String = "", alias: String = ""): Int {
-     * @param profile 0 = Opus GOOD, 1 = Opus DEGRADED, 2 = Codec2 CATASTROPHIC
-     */
-    fun startCall(relayAddr: String, room: String, seedHex: String = "", token: String = "", alias: String = "", profile: Int = 0): Int {
         check(nativeHandle != 0L) { "Engine not initialized" }
-        val result = nativeStartCall(nativeHandle, relayAddr, room, seedHex, token, alias, profile)
+        val result = nativeStartCall(nativeHandle, relayAddr, room, seedHex, token, alias)
         if (result == 0) {
             callback.onCallStateChanged(CallStateConstants.CONNECTING)
         } else {
@@ -53,7 +50,6 @@ class WzpEngine(private val callback: WzpCallback) {
     }
 
     /** Stop the active call. Safe to call when no call is active. */
-    @Synchronized
     fun stopCall() {
         if (nativeHandle != 0L) {
             nativeStopCall(nativeHandle)
@@ -77,7 +73,6 @@ class WzpEngine(private val callback: WzpCallback) {
      *
      * @return JSON-serialised [CallStats], or `"{}"` if the engine is not initialised.
      */
-    @Synchronized
     fun getStats(): String {
         if (nativeHandle == 0L) return "{}"
         return try {
@@ -97,7 +92,6 @@ class WzpEngine(private val callback: WzpCallback) {
     }
 
     /** Destroy the native engine and free all resources. The instance must not be reused. */
-    @Synchronized
     fun destroy() {
         if (nativeHandle != 0L) {
             nativeDestroy(nativeHandle)
@@ -147,7 +141,7 @@ class WzpEngine(private val callback: WzpCallback) {
 
     private external fun nativeInit(): Long
     private external fun nativeStartCall(
-        handle: Long, relay: String, room: String, seed: String, token: String, alias: String, profile: Int
+        handle: Long, relay: String, room: String, seed: String, token: String, alias: String
     ): Int
     private external fun nativeStopCall(handle: Long)
     private external fun nativeSetMute(handle: Long, muted: Boolean)
@@ -159,59 +153,20 @@ class WzpEngine(private val callback: WzpCallback) {
     private external fun nativeWriteAudioDirect(handle: Long, buffer: java.nio.ByteBuffer, sampleCount: Int): Int
     private external fun nativeReadAudioDirect(handle: Long, buffer: java.nio.ByteBuffer, maxSamples: Int): Int
     private external fun nativeDestroy(handle: Long)
-    private external fun nativePingRelay(handle: Long, relay: String): String?
-    private external fun nativeStartSignaling(handle: Long, relay: String, seed: String, token: String, alias: String): Int
-    private external fun nativePlaceCall(handle: Long, targetFp: String): Int
-    private external fun nativeAnswerCall(handle: Long, callId: String, mode: Int): Int
-
-    /**
-     * Ping a relay server. Requires engine to be initialized.
-     * Returns JSON `{"rtt_ms":N,"server_fingerprint":"hex"}` or null.
-     */
-    fun pingRelay(address: String): String? {
-        if (nativeHandle == 0L) return null
-        return nativePingRelay(nativeHandle, address)
-    }
-
-    /**
-     * Start persistent signaling connection for direct 1:1 calls.
-     * The engine registers on the relay and listens for incoming calls.
-     * Call state updates are available via [getStats].
-     *
-     * @return 0 on success, -1 on error
-     */
-    fun startSignaling(relay: String, seed: String = "", token: String = "", alias: String = ""): Int {
-        check(nativeHandle != 0L) { "Engine not initialized" }
-        return nativeStartSignaling(nativeHandle, relay, seed, token, alias)
-    }
-
-    /**
-     * Place a direct call to a peer by fingerprint.
-     * Requires [startSignaling] to have been called first.
-     *
-     * @return 0 on success, -1 on error
-     */
-    fun placeCall(targetFingerprint: String): Int {
-        check(nativeHandle != 0L) { "Engine not initialized" }
-        return nativePlaceCall(nativeHandle, targetFingerprint)
-    }
-
-    /**
-     * Answer an incoming direct call.
-     *
-     * @param callId The call ID from the incoming call (available in stats.incoming_call_id)
-     * @param mode 0=Reject, 1=AcceptTrusted (P2P in Phase 2), 2=AcceptGeneric (relay-mediated)
-     * @return 0 on success, -1 on error
-     */
-    fun answerCall(callId: String, mode: Int = 2): Int {
-        check(nativeHandle != 0L) { "Engine not initialized" }
-        return nativeAnswerCall(nativeHandle, callId, mode)
-    }
 
     companion object {
         init {
             System.loadLibrary("wzp_android")
         }
+
+        /**
+         * Ping a relay server. Returns JSON `{"rtt_ms":N,"server_fingerprint":"hex"}`
+         * or null if unreachable. Does not require an engine instance.
+         */
+        fun pingRelay(address: String): String? = nativePingRelay(address)
+
+        @JvmStatic
+        private external fun nativePingRelay(relay: String): String?
     }
 }
 

android/app/src/main/java/com/wzp/net/RelayPinger.kt

@@ -1,12 +0,0 @@
-package com.wzp.net
-
-// Relay pinging is now done via WzpEngine.pingRelay() (instance method).
-// This file kept for the data class only.
-
-object RelayPinger {
-    data class PingResult(
-        val rttMs: Int,
-        val reachable: Boolean,
-        val serverFingerprint: String = "",
-    )
-}

android/app/src/main/java/com/wzp/ui/call/CallViewModel.kt

@@ -31,8 +31,7 @@ data class ServerEntry(val address: String, val label: String)
 
 data class PingResult(
     val rttMs: Int,
-    val serverFingerprint: String = "",
+    val serverFingerprint: String,
-    val reachable: Boolean = rttMs > 0,
 )
 
 enum class LockStatus { UNKNOWN, OFFLINE, NEW, VERIFIED, CHANGED }
@@ -106,18 +105,6 @@ class CallViewModel : ViewModel(), WzpCallback {
     private val _aecEnabled = MutableStateFlow(true)
     val aecEnabled: StateFlow<Boolean> = _aecEnabled.asStateFlow()
 
-    private val _debugRecording = MutableStateFlow(false)
-    val debugRecording: StateFlow<Boolean> = _debugRecording.asStateFlow()
-
-    // Quality profile index (matches JNI bridge profile_from_int)
-    private val _codecChoice = MutableStateFlow(0)
-    val codecChoice: StateFlow<Int> = _codecChoice.asStateFlow()
-
-    /** Key-change warning dialog state. */
-    data class KeyWarningInfo(val address: String, val oldFp: String, val newFp: String)
-    private val _keyWarning = MutableStateFlow<KeyWarningInfo?>(null)
-    val keyWarning: StateFlow<KeyWarningInfo?> = _keyWarning.asStateFlow()
-
     /** True when a call just ended and debug report can be sent. */
     private val _debugReportAvailable = MutableStateFlow(false)
     val debugReportAvailable: StateFlow<Boolean> = _debugReportAvailable.asStateFlow()
@@ -132,91 +119,13 @@ class CallViewModel : ViewModel(), WzpCallback {
 
     private var statsJob: Job? = null
 
-    // ── Direct calling state ──
-    /** 0=room mode, 1=direct call mode */
-    private val _callMode = MutableStateFlow(0)
-    val callMode: StateFlow<Int> = _callMode.asStateFlow()
-
-    /** Target fingerprint for direct call */
-    private val _targetFingerprint = MutableStateFlow("")
-    val targetFingerprint: StateFlow<String> = _targetFingerprint.asStateFlow()
-
-    /** Signal connection state: 0=idle, 5=registered, 6=ringing, 7=incoming */
-    private val _signalState = MutableStateFlow(0)
-    val signalState: StateFlow<Int> = _signalState.asStateFlow()
-
-    /** Incoming call info */
-    private val _incomingCallId = MutableStateFlow<String?>(null)
-    val incomingCallId: StateFlow<String?> = _incomingCallId.asStateFlow()
-
-    private val _incomingCallerFp = MutableStateFlow<String?>(null)
-    val incomingCallerFp: StateFlow<String?> = _incomingCallerFp.asStateFlow()
-
-    private val _incomingCallerAlias = MutableStateFlow<String?>(null)
-    val incomingCallerAlias: StateFlow<String?> = _incomingCallerAlias.asStateFlow()
-
-    fun setCallMode(mode: Int) { _callMode.value = mode }
-    fun setTargetFingerprint(fp: String) { _targetFingerprint.value = fp }
-
-    /** Register on relay for direct calls */
-    fun registerForCalls() {
-        if (engine == null) {
-            engine = WzpEngine(this).also { it.init() }
-        }
-        val serverIdx = _selectedServer.value
-        val serverList = _servers.value
-        if (serverIdx >= serverList.size) return
-
-        val relay = serverList[serverIdx].address
-        val seed = _seedHex.value
-        val alias = _alias.value
-
-        viewModelScope.launch(Dispatchers.IO) {
-            val resolvedRelay = resolveToIp(relay) ?: relay
-            val result = engine?.startSignaling(resolvedRelay, seed, "", alias)
-            if (result == 0) {
-                _signalState.value = 5 // Registered
-                startStatsPolling()
-            } else {
-                _errorMessage.value = "Failed to register on relay"
-            }
-        }
-    }
-
-    /** Place a direct call to the target fingerprint */
-    fun placeDirectCall() {
-        val target = _targetFingerprint.value.trim()
-        if (target.isEmpty()) {
-            _errorMessage.value = "Enter a fingerprint to call"
-            return
-        }
-        engine?.placeCall(target)
-        _signalState.value = 6 // Ringing
-    }
-
-    /** Answer an incoming direct call */
-    fun answerIncomingCall(mode: Int = 2) {
-        val callId = _incomingCallId.value ?: return
-        engine?.answerCall(callId, mode)
-    }
-
-    /** Reject an incoming direct call */
-    fun rejectIncomingCall() {
-        val callId = _incomingCallId.value ?: return
-        engine?.answerCall(callId, 0) // 0 = Reject
-        _signalState.value = 5 // Back to registered
-        _incomingCallId.value = null
-        _incomingCallerFp.value = null
-        _incomingCallerAlias.value = null
-    }
-
     companion object {
         private const val TAG = "WzpCall"
         val DEFAULT_SERVERS = listOf(
             ServerEntry("172.16.81.175:4433", "LAN (172.16.81.175)"),
             ServerEntry("193.180.213.68:4433", "Pangolin (IP)"),
         )
-        const val DEFAULT_ROOM = "general"
+        const val DEFAULT_ROOM = "android"
     }
 
     fun setContext(context: Context) {
@@ -250,8 +159,6 @@ class CallViewModel : ViewModel(), WzpCallback {
         _captureGainDb.value = s.loadCaptureGain()
         _seedHex.value = s.getOrCreateSeedHex()
         _aecEnabled.value = s.loadAecEnabled()
-        _debugRecording.value = s.loadDebugRecording()
-        _codecChoice.value = s.loadCodecChoice()
         _recentRooms.value = s.loadRecentRooms()
     }
 
@@ -296,43 +203,35 @@ class CallViewModel : ViewModel(), WzpCallback {
         settings?.saveSelectedServer(_selectedServer.value)
     }
 
-    /**
+    /** Ping all servers in background, update results. */
-     * Ping all servers via native QUIC. Requires engine to be initialized.
-     * Creates engine if needed, pings, keeps engine alive for subsequent Connect.
-     */
     fun pingAllServers() {
         viewModelScope.launch {
-            // Ensure engine exists
-            if (engine == null || engine?.isInitialized != true) {
-                try {
-                    engine = WzpEngine(this@CallViewModel).also { it.init() }
-                    engineInitialized = true
-                } catch (e: Exception) {
-                    Log.w(TAG, "engine init for ping failed: $e")
-                    return@launch
-                }
-            }
-            val eng = engine ?: return@launch
-
             val results = mutableMapOf<String, PingResult>()
             val known = mutableMapOf<String, String>()
             _servers.value.forEach { server ->
-                val json = withContext(Dispatchers.IO) {
+                val pr = withContext(Dispatchers.IO) {
-                    eng.pingRelay(server.address)
-                }
-                if (json != null) {
                     try {
+                        val json = WzpEngine.pingRelay(server.address) ?: return@withContext null
                         val obj = JSONObject(json)
-                        val rtt = obj.getInt("rtt_ms")
+                        PingResult(
-                        val fp = obj.optString("server_fingerprint", "")
+                            rttMs = obj.getInt("rtt_ms"),
-                        results[server.address] = PingResult(rttMs = rtt, serverFingerprint = fp)
+                            serverFingerprint = obj.optString("server_fingerprint", ""),
-                        // TOFU
+                        )
-                        if (fp.isNotEmpty()) {
+                    } catch (e: Exception) {
-                            val saved = settings?.loadServerFingerprint(server.address)
+                        Log.w(TAG, "ping ${server.address} failed: ${e.message}")
-                            if (saved == null) settings?.saveServerFingerprint(server.address, fp)
+                        null
-                            known[server.address] = saved ?: fp
+                    }
+                }
+                if (pr != null) {
+                    results[server.address] = pr
+                    // TOFU: save fingerprint on first contact
+                    if (pr.serverFingerprint.isNotEmpty()) {
+                        val saved = settings?.loadServerFingerprint(server.address)
+                        if (saved == null) {
+                            settings?.saveServerFingerprint(server.address, pr.serverFingerprint)
+                        }
+                        known[server.address] = saved ?: pr.serverFingerprint
                     }
-                    } catch (_: Exception) {}
                 }
             }
             _pingResults.value = results
@@ -340,23 +239,12 @@ class CallViewModel : ViewModel(), WzpCallback {
         }
     }
 
-    /** Load saved TOFU fingerprints. */
-    fun loadSavedFingerprints() {
-        val known = mutableMapOf<String, String>()
-        _servers.value.forEach { server ->
-            settings?.loadServerFingerprint(server.address)?.let {
-                known[server.address] = it
-            }
-        }
-        _knownFingerprints.value = known
-    }
-
     /** Get lock status for a server. */
     fun lockStatus(address: String): LockStatus {
         val pr = _pingResults.value[address] ?: return LockStatus.UNKNOWN
-        if (!pr.reachable) return LockStatus.OFFLINE
+        val known = _knownFingerprints.value[address]
-        val known = _knownFingerprints.value[address] ?: return LockStatus.NEW
         if (pr.serverFingerprint.isEmpty()) return LockStatus.NEW
+        if (known == null) return LockStatus.NEW
         return if (pr.serverFingerprint == known) LockStatus.VERIFIED else LockStatus.CHANGED
     }
 
@@ -392,16 +280,6 @@ class CallViewModel : ViewModel(), WzpCallback {
         settings?.saveAecEnabled(enabled)
     }
 
-    fun setDebugRecording(enabled: Boolean) {
-        _debugRecording.value = enabled
-        settings?.saveDebugRecording(enabled)
-    }
-
-    fun setCodecChoice(choice: Int) {
-        _codecChoice.value = choice
-        settings?.saveCodecChoice(choice)
-    }
-
     /**
      * Resolve DNS hostname to IP address on the Kotlin/Android side,
      * since Rust's DNS resolution may not work on Android.
@@ -468,74 +346,7 @@ class CallViewModel : ViewModel(), WzpCallback {
         Log.i(TAG, "teardown: done")
     }
 
-    /** Accept the new server key and proceed with the call. */
-    fun acceptNewFingerprint() {
-        val info = _keyWarning.value ?: return
-        _knownFingerprints.value = _knownFingerprints.value.toMutableMap().also {
-            it[info.address] = info.newFp
-        }
-        settings?.saveServerFingerprint(info.address, info.newFp)
-        _keyWarning.value = null
-        startCallInternal()
-    }
-
-    fun dismissKeyWarning() {
-        _keyWarning.value = null
-    }
-
     fun startCall() {
-        val serverEntry = _servers.value[_selectedServer.value]
-        // Check for key change before connecting
-        val ls = lockStatus(serverEntry.address)
-        if (ls == LockStatus.CHANGED) {
-            val known = _knownFingerprints.value[serverEntry.address] ?: ""
-            val current = _pingResults.value[serverEntry.address]?.serverFingerprint ?: ""
-            _keyWarning.value = KeyWarningInfo(serverEntry.address, known, current)
-            return
-        }
-        startCallInternal()
-    }
-
-    /** Start a call to a specific relay + room (used by direct call setup). */
-    private fun startCallInternal(relay: String, room: String) {
-        Log.i(TAG, "startCallDirect: relay=$relay room=$room")
-        try {
-            // Don't teardown — keep the signal connection alive
-            engine = WzpEngine(this)
-            engine!!.init()
-            engineInitialized = true
-            _callState.value = 1
-            _errorMessage.value = null
-            try { appContext?.let { CallService.start(it) } } catch (e: Exception) {
-                Log.w(TAG, "service start err: $e")
-            }
-            startStatsPolling()
-            viewModelScope.launch(kotlinx.coroutines.Dispatchers.IO) {
-                try {
-                    val seed = _seedHex.value
-                    val name = _alias.value
-                    val result = engine?.startCall(relay, room, seedHex = seed, alias = name, profile = _codecChoice.value) ?: -1
-                    CallService.onStopFromNotification = { stopCall() }
-                    if (result != 0) {
-                        _callState.value = 0
-                        _errorMessage.value = "Failed to connect to call room (code $result)"
-                        appContext?.let { CallService.stop(it) }
-                    }
-                } catch (e: Exception) {
-                    Log.e(TAG, "startCallDirect error", e)
-                    _callState.value = 0
-                    _errorMessage.value = "Engine error: ${e.message}"
-                    appContext?.let { CallService.stop(it) }
-                }
-            }
-        } catch (e: Exception) {
-            Log.e(TAG, "startCallDirect error", e)
-            _callState.value = 0
-            _errorMessage.value = "Engine error: ${e.message}"
-        }
-    }
-
-    private fun startCallInternal() {
         val serverEntry = _servers.value[_selectedServer.value]
         val room = _roomName.value
         Log.i(TAG, "startCall: server=${serverEntry.address} room=$room")
@@ -566,7 +377,7 @@ class CallViewModel : ViewModel(), WzpCallback {
                     val seed = _seedHex.value
                     val name = _alias.value
                     Log.i(TAG, "startCall: resolved=$relay, alias=$name, calling engine.startCall")
-                    val result = engine?.startCall(relay, room, seedHex = seed, alias = name, profile = _codecChoice.value) ?: -1
+                    val result = engine?.startCall(relay, room, seedHex = seed, alias = name) ?: -1
                     Log.i(TAG, "startCall: engine returned $result")
                     // Only wire up notification callback after engine is running
                     CallService.onStopFromNotification = { stopCall() }
@@ -657,7 +468,6 @@ class CallViewModel : ViewModel(), WzpCallback {
             it.playoutGainDb = _playoutGainDb.value
             it.captureGainDb = _captureGainDb.value
             it.aecEnabled = _aecEnabled.value
-            it.debugRecording = _debugRecording.value
             it.start(e)
         }
         audioRouteManager?.register()
@@ -688,27 +498,6 @@ class CallViewModel : ViewModel(), WzpCallback {
                         if (s.state != 0) {
                             _callState.value = s.state
                         }
-                        // Track signal state changes for direct calling
-                        if (s.state in 5..7) {
-                            _signalState.value = s.state
-                        }
-                        // Incoming call detection
-                        if (s.state == 7) { // IncomingCall
-                            _incomingCallId.value = s.incomingCallId
-                            _incomingCallerFp.value = s.incomingCallerFp
-                            _incomingCallerAlias.value = s.incomingCallerAlias
-                        }
-                        // CallSetup: auto-connect to media room
-                        if (s.state == 1 && s.incomingCallId != null && s.incomingCallId.contains("|")) {
-                            // Format: "relay_addr|room_name"
-                            val parts = s.incomingCallId.split("|", limit = 2)
-                            if (parts.size == 2) {
-                                val mediaRelay = parts[0]
-                                val mediaRoom = parts[1]
-                                Log.i(TAG, "CallSetup: connecting to $mediaRelay room $mediaRoom")
-                                startCallInternal(mediaRelay, mediaRoom)
-                            }
-                        }
                         if (s.state == 2 && !audioStarted) {
                             startAudio()
                         }

android/app/src/main/java/com/wzp/ui/call/InCallScreen.kt

@@ -89,60 +89,9 @@ fun InCallScreen(
     val pingResults by viewModel.pingResults.collectAsState()
 
     var showManageRelays by remember { mutableStateOf(false) }
-    val keyWarning by viewModel.keyWarning.collectAsState()
 
-    // Key-change warning dialog
+    // Auto-ping on first display
-    keyWarning?.let { info ->
+    LaunchedEffect(Unit) { viewModel.pingAllServers() }
-        AlertDialog(
-            onDismissRequest = { viewModel.dismissKeyWarning() },
-            title = {
-                Column(horizontalAlignment = Alignment.CenterHorizontally, modifier = Modifier.fillMaxWidth()) {
-                    Text("\u26A0\uFE0F", fontSize = 40.sp)
-                    Spacer(modifier = Modifier.height(8.dp))
-                    Text("Server Key Changed", fontWeight = FontWeight.Bold)
-                }
-            },
-            text = {
-                Column {
-                    Text(
-                        "The relay's identity has changed since you last connected. " +
-                        "This usually happens when the server was restarted.",
-                        style = MaterialTheme.typography.bodySmall,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant
-                    )
-                    Spacer(modifier = Modifier.height(12.dp))
-                    Text("Previously known", style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
-                    Text(info.oldFp, fontFamily = FontFamily.Monospace, style = MaterialTheme.typography.bodySmall)
-                    Spacer(modifier = Modifier.height(8.dp))
-                    Text("New key", style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
-                    Text(info.newFp, fontFamily = FontFamily.Monospace, style = MaterialTheme.typography.bodySmall)
-                }
-            },
-            confirmButton = {
-                Button(
-                    onClick = { viewModel.acceptNewFingerprint() },
-                    colors = ButtonDefaults.buttonColors(containerColor = Color(0xFFFACC15))
-                ) {
-                    Text("Accept New Key", color = Color.Black, fontWeight = FontWeight.Bold)
-                }
-            },
-            dismissButton = {
-                TextButton(onClick = { viewModel.dismissKeyWarning() }) {
-                    Text("Cancel")
-                }
-            }
-        )
-    }
-
-    // Ping once on launch, then every 5 minutes
-    LaunchedEffect(Unit) {
-        viewModel.loadSavedFingerprints()
-        viewModel.pingAllServers()
-        while (true) {
-            kotlinx.coroutines.delay(300_000) // 5 minutes
-            viewModel.pingAllServers()
-        }
-    }
 
     Surface(
         modifier = Modifier.fillMaxSize(),
@@ -217,40 +166,7 @@ fun InCallScreen(
 
                 Spacer(modifier = Modifier.height(12.dp))
 
-                // Mode toggle: Room vs Direct Call
+                // Room
-                val callMode by viewModel.callMode.collectAsState()
-                val signalState by viewModel.signalState.collectAsState()
-                val targetFp by viewModel.targetFingerprint.collectAsState()
-                val incomingCallId by viewModel.incomingCallId.collectAsState()
-                val incomingCallerFp by viewModel.incomingCallerFp.collectAsState()
-                val incomingCallerAlias by viewModel.incomingCallerAlias.collectAsState()
-
-                Row(
-                    modifier = Modifier.fillMaxWidth(),
-                    horizontalArrangement = Arrangement.spacedBy(8.dp)
-                ) {
-                    Button(
-                        onClick = { viewModel.setCallMode(0) },
-                        modifier = Modifier.weight(1f).height(36.dp),
-                        shape = RoundedCornerShape(8.dp),
-                        colors = ButtonDefaults.buttonColors(
-                            containerColor = if (callMode == 0) Accent else Color(0xFF333333)
-                        )
-                    ) { Text("Room", color = Color.White, fontSize = 13.sp) }
-                    Button(
-                        onClick = { viewModel.setCallMode(1) },
-                        modifier = Modifier.weight(1f).height(36.dp),
-                        shape = RoundedCornerShape(8.dp),
-                        colors = ButtonDefaults.buttonColors(
-                            containerColor = if (callMode == 1) Accent else Color(0xFF333333)
-                        )
-                    ) { Text("Direct Call", color = Color.White, fontSize = 13.sp) }
-                }
-
-                Spacer(modifier = Modifier.height(12.dp))
-
-                if (callMode == 0) {
-                    // ── Room mode ──
                 SectionLabel("ROOM")
                 OutlinedTextField(
                     value = roomName,
@@ -261,6 +177,7 @@ fun InCallScreen(
 
                 Spacer(modifier = Modifier.height(12.dp))
 
+                // Alias
                 SectionLabel("ALIAS")
                 OutlinedTextField(
                     value = alias,
@@ -271,6 +188,7 @@ fun InCallScreen(
 
                 Spacer(modifier = Modifier.height(12.dp))
 
+                // AEC + Settings
                 Row(
                     verticalAlignment = Alignment.CenterVertically,
                     modifier = Modifier.fillMaxWidth()
@@ -295,6 +213,7 @@ fun InCallScreen(
 
                 Spacer(modifier = Modifier.height(16.dp))
 
+                // Connect button
                 Button(
                     onClick = { viewModel.startCall() },
                     modifier = Modifier.fillMaxWidth().height(48.dp),
@@ -307,122 +226,6 @@ fun InCallScreen(
                         color = Color.White
                     )
                 }
-                } else {
-                    // ── Direct call mode ──
-                    if (signalState < 5) {
-                        // Not registered yet
-                        SectionLabel("ALIAS")
-                        OutlinedTextField(
-                            value = alias,
-                            onValueChange = { viewModel.setAlias(it) },
-                            singleLine = true,
-                            modifier = Modifier.fillMaxWidth()
-                        )
-
-                        Spacer(modifier = Modifier.height(16.dp))
-
-                        Button(
-                            onClick = { viewModel.registerForCalls() },
-                            modifier = Modifier.fillMaxWidth().height(48.dp),
-                            shape = RoundedCornerShape(8.dp),
-                            colors = ButtonDefaults.buttonColors(containerColor = Color(0xFF2196F3))
-                        ) {
-                            Text(
-                                "Register on Relay",
-                                style = MaterialTheme.typography.titleMedium.copy(fontWeight = FontWeight.Bold),
-                                color = Color.White
-                            )
-                        }
-                    } else if (signalState == 5) {
-                        // Registered — show dial pad
-                        Text(
-                            "\u2705 Registered — waiting for calls",
-                            color = Green,
-                            style = MaterialTheme.typography.bodyMedium
-                        )
-
-                        Spacer(modifier = Modifier.height(12.dp))
-
-                        // Incoming call notification
-                        if (incomingCallId != null && incomingCallerFp != null) {
-                            Surface(
-                                color = Color(0xFF1B5E20),
-                                shape = RoundedCornerShape(12.dp),
-                                modifier = Modifier.fillMaxWidth()
-                            ) {
-                                Column(modifier = Modifier.padding(16.dp)) {
-                                    Text(
-                                        "Incoming Call",
-                                        color = Color.White,
-                                        style = MaterialTheme.typography.titleMedium.copy(fontWeight = FontWeight.Bold)
-                                    )
-                                    Text(
-                                        "From: ${incomingCallerAlias ?: incomingCallerFp?.take(16) ?: "unknown"}",
-                                        color = Color.White.copy(alpha = 0.8f),
-                                        style = MaterialTheme.typography.bodySmall
-                                    )
-                                    Spacer(modifier = Modifier.height(12.dp))
-                                    Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
-                                        Button(
-                                            onClick = { viewModel.answerIncomingCall(2) },
-                                            colors = ButtonDefaults.buttonColors(containerColor = Green),
-                                            modifier = Modifier.weight(1f)
-                                        ) { Text("Accept", color = Color.White) }
-                                        Button(
-                                            onClick = { viewModel.rejectIncomingCall() },
-                                            colors = ButtonDefaults.buttonColors(containerColor = Red),
-                                            modifier = Modifier.weight(1f)
-                                        ) { Text("Reject", color = Color.White) }
-                                    }
-                                }
-                            }
-                            Spacer(modifier = Modifier.height(12.dp))
-                        }
-
-                        SectionLabel("CALL BY FINGERPRINT")
-                        OutlinedTextField(
-                            value = targetFp,
-                            onValueChange = { viewModel.setTargetFingerprint(it) },
-                            singleLine = true,
-                            placeholder = { Text("Paste fingerprint (xxxx:xxxx:...)") },
-                            modifier = Modifier.fillMaxWidth()
-                        )
-
-                        Spacer(modifier = Modifier.height(16.dp))
-
-                        Button(
-                            onClick = { viewModel.placeDirectCall() },
-                            modifier = Modifier.fillMaxWidth().height(48.dp),
-                            shape = RoundedCornerShape(8.dp),
-                            colors = ButtonDefaults.buttonColors(containerColor = Accent),
-                            enabled = targetFp.isNotBlank()
-                        ) {
-                            Text(
-                                "Call",
-                                style = MaterialTheme.typography.titleMedium.copy(fontWeight = FontWeight.Bold),
-                                color = Color.White
-                            )
-                        }
-                    } else if (signalState == 6) {
-                        // Ringing
-                        Text(
-                            "\uD83D\uDD14 Ringing...",
-                            color = Yellow,
-                            style = MaterialTheme.typography.titleMedium,
-                            textAlign = TextAlign.Center,
-                            modifier = Modifier.fillMaxWidth()
-                        )
-                    } else if (signalState == 7) {
-                        // Incoming call (state 7 also handled above in registered view)
-                        Text(
-                            "\uD83D\uDCDE Incoming call...",
-                            color = Green,
-                            style = MaterialTheme.typography.titleMedium,
-                            textAlign = TextAlign.Center,
-                            modifier = Modifier.fillMaxWidth()
-                        )
-                    }
-                }
 
                 errorMessage?.let { err ->
                     Spacer(modifier = Modifier.height(8.dp))
@@ -557,29 +360,7 @@ fun InCallScreen(
                         if (stats.roomParticipantCount > 0) {
                             val unique = stats.roomParticipants
                                 .distinctBy { it.fingerprint.ifEmpty { it.displayName } }
-                            // Group by relay
+                            unique.forEach { member ->
-                            val grouped = unique.groupBy { it.relayLabel ?: "This Relay" }
-                            grouped.forEach { (relay, members) ->
-                                // Relay header
-                                val isLocal = relay == "This Relay"
-                                Row(
-                                    verticalAlignment = Alignment.CenterVertically,
-                                    modifier = Modifier.padding(top = 4.dp, bottom = 2.dp)
-                                ) {
-                                    Box(
-                                        modifier = Modifier
-                                            .size(6.dp)
-                                            .clip(CircleShape)
-                                            .background(if (isLocal) Green else Color(0xFF60A5FA))
-                                    )
-                                    Spacer(modifier = Modifier.width(6.dp))
-                                    Text(
-                                        text = relay.uppercase(),
-                                        style = MaterialTheme.typography.labelSmall.copy(letterSpacing = 0.5.sp),
-                                        color = TextDim
-                                    )
-                                }
-                                members.forEach { member ->
                                 Row(
                                     verticalAlignment = Alignment.CenterVertically,
                                     modifier = Modifier.padding(vertical = 4.dp)
@@ -608,7 +389,6 @@ fun InCallScreen(
                                     }
                                 }
                             }
-                            }
                         } else {
                             Text(
                                 text = "Waiting for participants...",
@@ -632,51 +412,7 @@ fun InCallScreen(
 
                 Spacer(modifier = Modifier.height(12.dp))
 
-                // Codec + Stats
+                // Stats
-                if (stats.currentCodec.isNotEmpty()) {
-                    val codecLabel = formatCodecName(stats.currentCodec)
-                    val peerLabel = if (stats.peerCodec.isNotEmpty()) formatCodecName(stats.peerCodec) else null
-                    val autoTag = if (stats.autoMode) " [Auto]" else ""
-                    Row(
-                        modifier = Modifier.fillMaxWidth(),
-                        horizontalArrangement = Arrangement.Center,
-                        verticalAlignment = Alignment.CenterVertically
-                    ) {
-                        // Our codec badge
-                        Surface(
-                            shape = RoundedCornerShape(4.dp),
-                            color = codecColor(stats.currentCodec)
-                        ) {
-                            Text(
-                                text = "TX $codecLabel$autoTag",
-                                modifier = Modifier.padding(horizontal = 6.dp, vertical = 2.dp),
-                                style = MaterialTheme.typography.labelSmall.copy(
-                                    fontFamily = FontFamily.Monospace,
-                                    fontSize = 10.sp
-                                ),
-                                color = Color.White
-                            )
-                        }
-                        if (peerLabel != null) {
-                            Spacer(modifier = Modifier.width(6.dp))
-                            Surface(
-                                shape = RoundedCornerShape(4.dp),
-                                color = codecColor(stats.peerCodec)
-                            ) {
-                                Text(
-                                    text = "RX $peerLabel",
-                                    modifier = Modifier.padding(horizontal = 6.dp, vertical = 2.dp),
-                                    style = MaterialTheme.typography.labelSmall.copy(
-                                        fontFamily = FontFamily.Monospace,
-                                        fontSize = 10.sp
-                                    ),
-                                    color = Color.White
-                                )
-                            }
-                        }
-                    }
-                    Spacer(modifier = Modifier.height(4.dp))
-                }
                 Text(
                     text = "TX: ${stats.framesEncoded} | RX: ${stats.framesDecoded}",
                     style = MaterialTheme.typography.labelSmall.copy(fontFamily = FontFamily.Monospace),
@@ -698,7 +434,6 @@ fun InCallScreen(
             onSelect = { idx -> viewModel.selectServer(idx) },
             onDelete = { idx -> viewModel.removeServer(idx) },
             onAdd = { addr, label -> viewModel.addServer(addr, label) },
-            onRefresh = { viewModel.pingAllServers() },
             onDismiss = { showManageRelays = false }
         )
     }
@@ -727,7 +462,6 @@ private fun ManageRelaysDialog(
     onSelect: (Int) -> Unit,
     onDelete: (Int) -> Unit,
     onAdd: (String, String) -> Unit,
-    onRefresh: () -> Unit,
     onDismiss: () -> Unit
 ) {
     var addName by remember { mutableStateOf("") }
@@ -743,17 +477,6 @@ private fun ManageRelaysDialog(
                 verticalAlignment = Alignment.CenterVertically
             ) {
                 Text("Manage Relays", color = Color.White, fontWeight = FontWeight.Bold)
-                Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
-                    Surface(
-                        onClick = onRefresh,
-                        shape = RoundedCornerShape(8.dp),
-                        color = DarkSurface2,
-                        modifier = Modifier.size(32.dp)
-                    ) {
-                        Box(contentAlignment = Alignment.Center) {
-                            Text("\u21BB", color = TextDim, fontSize = 16.sp)
-                        }
-                    }
                 Surface(
                     onClick = onDismiss,
                     shape = RoundedCornerShape(8.dp),
@@ -765,7 +488,6 @@ private fun ManageRelaysDialog(
                     }
                 }
             }
-            }
         },
         text = {
             Column {
@@ -817,17 +539,13 @@ private fun ManageRelaysDialog(
                                     )
                                 }
                             }
-                            Spacer(modifier = Modifier.width(4.dp))
+                            Spacer(modifier = Modifier.width(8.dp))
-                            Surface(
+                            Text(
-                                onClick = { onDelete(idx) },
+                                "\u00D7",
-                                shape = RoundedCornerShape(4.dp),
+                                color = TextDim,
-                                color = Color.Transparent,
+                                fontSize = 18.sp,
-                                modifier = Modifier.size(32.dp)
+                                modifier = Modifier.clickable { onDelete(idx) }
-                            ) {
+                            )
-                                Box(contentAlignment = Alignment.Center) {
-                                    Text("\u00D7", color = TextDim, fontSize = 18.sp)
-                                }
-                            }
                         }
                     }
                 }
@@ -1038,25 +756,3 @@ private fun DebugReportCard(
         }
     }
 }
-
-/** Map Rust CodecId debug name to a human-readable label. */
-private fun formatCodecName(codecId: String): String = when (codecId) {
-    "Opus64k" -> "Opus 64k"
-    "Opus48k" -> "Opus 48k"
-    "Opus32k" -> "Opus 32k"
-    "Opus24k" -> "Opus 24k"
-    "Opus16k" -> "Opus 16k"
-    "Opus6k" -> "Opus 6k"
-    "Codec2_3200" -> "C2 3.2k"
-    "Codec2_1200" -> "C2 1.2k"
-    else -> codecId
-}
-
-/** Color-code codec badges by quality tier. */
-private fun codecColor(codecId: String): Color = when (codecId) {
-    "Opus64k", "Opus48k", "Opus32k" -> Color(0xFF0D6EFD) // blue — studio
-    "Opus24k", "Opus16k" -> Color(0xFF198754) // green — good
-    "Opus6k" -> Color(0xFFCC8800) // amber — degraded
-    "Codec2_3200", "Codec2_1200" -> Color(0xFFDC3545) // red — catastrophic
-    else -> Color(0xFF6C757D) // gray
-}

android/app/src/main/java/com/wzp/ui/settings/SettingsScreen.kt

@@ -1,6 +1,5 @@
 package com.wzp.ui.settings
 
-import androidx.compose.foundation.clickable
 import android.content.ClipData
 import android.content.ClipboardManager
 import android.content.Context
@@ -23,7 +22,6 @@ import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Divider
-import androidx.compose.material3.RadioButton
 import androidx.compose.material3.FilledTonalButton
 import androidx.compose.material3.FilledTonalIconButton
 import androidx.compose.material3.IconButtonDefaults
@@ -243,51 +241,6 @@ fun SettingsScreen(
                 )
             }
 
-            Spacer(modifier = Modifier.height(12.dp))
-
-            // Quality selection — slider from best (studio 64k) to worst (codec2 1.2k) + auto
-            val qualityLabels = listOf(
-                "Studio 64k", "Studio 48k", "Studio 32k", "Auto",
-                "Opus 24k", "Opus 6k", "Codec2 3.2k", "Codec2 1.2k"
-            )
-            // Map slider position to JNI profile int:
-            // 0=Studio64k(6), 1=Studio48k(5), 2=Studio32k(4), 3=Auto(7),
-            // 4=Opus24k(0), 5=Opus6k(1), 6=Codec2_3.2k(3), 7=Codec2_1.2k(2)
-            val sliderToProfile = intArrayOf(6, 5, 4, 7, 0, 1, 3, 2)
-            val profileToSlider = mapOf(6 to 0, 5 to 1, 4 to 2, 7 to 3, 0 to 4, 1 to 5, 3 to 6, 2 to 7)
-            val qualityColors = listOf(
-                Color(0xFF22C55E), Color(0xFF4ADE80), Color(0xFF86EFAC), Color(0xFFA3E635),
-                Color(0xFFA3E635), Color(0xFFFACC15), Color(0xFFE97320), Color(0xFF991B1B)
-            )
-            val currentCodec by viewModel.codecChoice.collectAsState()
-            val sliderPos = profileToSlider[currentCodec] ?: 3
-            Text("Quality", style = MaterialTheme.typography.bodyMedium)
-            Text(
-                text = "Decode always accepts all codecs",
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant
-            )
-            Spacer(modifier = Modifier.height(4.dp))
-            Text(
-                text = qualityLabels[sliderPos],
-                style = MaterialTheme.typography.titleMedium.copy(fontWeight = FontWeight.Bold),
-                color = qualityColors[sliderPos]
-            )
-            Slider(
-                value = sliderPos.toFloat(),
-                onValueChange = { viewModel.setCodecChoice(sliderToProfile[it.toInt()]) },
-                valueRange = 0f..7f,
-                steps = 6,
-                modifier = Modifier.fillMaxWidth()
-            )
-            Row(
-                modifier = Modifier.fillMaxWidth(),
-                horizontalArrangement = Arrangement.SpaceBetween
-            ) {
-                Text("Best", style = MaterialTheme.typography.labelSmall, color = Color(0xFF22C55E))
-                Text("Lowest", style = MaterialTheme.typography.labelSmall, color = Color(0xFF991B1B))
-            }
-
             Spacer(modifier = Modifier.height(24.dp))
             Divider()
             Spacer(modifier = Modifier.height(16.dp))

crates/wzp-android/Cargo.toml

@@ -17,7 +17,6 @@ wzp-crypto = { workspace = true }
 wzp-transport = { workspace = true }
 tokio = { workspace = true }
 tracing = { workspace = true }
-tracing-subscriber = { workspace = true, features = ["env-filter"] }
 bytes = { workspace = true }
 serde = { workspace = true }
 serde_json = "1"
@@ -28,7 +27,9 @@ libc = "0.2"
 jni = { version = "0.21", default-features = false }
 rand = { workspace = true }
 rustls = { version = "0.23", default-features = false, features = ["ring"] }
-tracing-android = "0.2"
+android_logger = "0.14"
+log = "0.4"
+tracing-log = "0.2"
 
 [build-dependencies]
 cc = "1"

crates/wzp-android/src/commands.rs

@@ -12,13 +12,4 @@ pub enum EngineCommand {
     ForceProfile(QualityProfile),
     /// Stop the call and shut down the engine.
     Stop,
-    /// Place a direct call to a fingerprint (requires signal connection).
-    PlaceCall { target_fingerprint: String },
-    /// Answer an incoming direct call.
-    AnswerCall {
-        call_id: String,
-        accept_mode: wzp_proto::CallAcceptMode,
-    },
-    /// Reject an incoming direct call.
-    RejectCall { call_id: String },
 }

crates/wzp-android/src/engine.rs

@@ -9,60 +9,32 @@
 //! and AudioTrack. PCM samples are transferred through lock-free ring buffers.
 
 use std::net::SocketAddr;
-use std::sync::atomic::{AtomicBool, AtomicU8, AtomicU16, AtomicU32, Ordering};
+use std::sync::atomic::{AtomicBool, AtomicU16, AtomicU32, Ordering};
 use std::sync::{Arc, Mutex};
 use std::time::Instant;
 
 use bytes::Bytes;
-use tracing::{debug, error, info, warn};
+use tracing::{error, info, warn};
-use wzp_codec::AdaptiveDecoder;
 use wzp_codec::agc::AutoGainControl;
-use wzp_codec::dred_ffi::{DredDecoderHandle, DredState};
+use wzp_codec::opus_dec::OpusDecoder;
+use wzp_codec::opus_enc::OpusEncoder;
 use wzp_crypto::{KeyExchange, WarzoneKeyExchange};
 use wzp_fec::{RaptorQFecDecoder, RaptorQFecEncoder};
 use wzp_proto::{
-    AdaptiveQualityController, AudioDecoder, AudioEncoder, CodecId, FecDecoder, FecEncoder,
+    AudioDecoder, AudioEncoder, CodecId, FecDecoder, FecEncoder,
-    MediaHeader, MediaPacket, MediaTransport, QualityController, QualityProfile, SignalMessage,
+    MediaHeader, MediaPacket, MediaTransport, QualityProfile, SignalMessage,
 };
 
 use crate::audio_ring::AudioRing;
 use crate::commands::EngineCommand;
 use crate::stats::{CallState, CallStats};
 
-/// Max frame size at 48kHz mono (40ms = 1920 samples, for Codec2/Opus6k).
+/// Opus frame size at 48kHz mono, 20ms = 960 samples.
-const MAX_FRAME_SAMPLES: usize = 1920;
+const FRAME_SAMPLES: usize = 960;
-
-/// Sentinel value: no profile change pending.
-const PROFILE_NO_CHANGE: u8 = 0xFF;
-
-/// All quality profiles in index order, for AtomicU8-based signaling.
-const PROFILES: [QualityProfile; 6] = [
-    QualityProfile::STUDIO_64K,   // 0
-    QualityProfile::STUDIO_48K,   // 1
-    QualityProfile::STUDIO_32K,   // 2
-    QualityProfile::GOOD,         // 3
-    QualityProfile::DEGRADED,     // 4
-    QualityProfile::CATASTROPHIC, // 5
-];
-
-fn profile_to_index(p: &QualityProfile) -> u8 {
-    PROFILES.iter().position(|pp| pp.codec == p.codec).map(|i| i as u8).unwrap_or(3)
-}
-
-fn index_to_profile(idx: u8) -> Option<QualityProfile> {
-    PROFILES.get(idx as usize).copied()
-}
-
-/// Compute frame samples at 48kHz for a given profile.
-fn frame_samples_for(profile: &QualityProfile) -> usize {
-    (profile.frame_duration_ms as usize) * 48 // 48000 / 1000
-}
 
 /// Configuration to start a call.
 pub struct CallStartConfig {
     pub profile: QualityProfile,
-    /// When true, use the relay's chosen_profile from CallAnswer instead of local profile.
-    pub auto_profile: bool,
     pub relay_addr: String,
     pub room: String,
     pub auth_token: Vec<u8>,
@@ -74,7 +46,6 @@ impl Default for CallStartConfig {
     fn default() -> Self {
         Self {
             profile: QualityProfile::GOOD,
-            auto_profile: false,
             relay_addr: String::new(),
             room: String::new(),
             auth_token: Vec::new(),
@@ -152,7 +123,6 @@ impl WzpEngine {
         let room = config.room.clone();
         let identity_seed = config.identity_seed;
         let profile = config.profile;
-        let auto_profile = config.auto_profile;
         let alias = config.alias.clone();
         let state = self.state.clone();
 
@@ -161,7 +131,7 @@ impl WzpEngine {
 
         let state_clone = state.clone();
         runtime.block_on(async move {
-            if let Err(e) = run_call(relay_addr, &room, &identity_seed, profile, auto_profile, alias.as_deref(), state_clone).await
+            if let Err(e) = run_call(relay_addr, &room, &identity_seed, profile, alias.as_deref(), state_clone).await
             {
                 error!("call failed: {e}");
             }
@@ -199,203 +169,6 @@ impl WzpEngine {
         info!("stop_call: done");
     }
 
-    /// Ping a relay — same pattern as start_call (creates runtime on calling thread).
-    /// Returns JSON `{"rtt_ms":N,"server_fingerprint":"hex"}` or error.
-    pub fn ping_relay(&self, address: &str) -> Result<String, anyhow::Error> {
-        let addr: SocketAddr = address.parse()?;
-        let _ = rustls::crypto::ring::default_provider().install_default();
-
-        let rt = tokio::runtime::Builder::new_current_thread()
-            .enable_all()
-            .build()?;
-
-        let result = rt.block_on(async {
-            let bind: SocketAddr = "0.0.0.0:0".parse().unwrap();
-            let endpoint = wzp_transport::create_endpoint(bind, None)?;
-            let client_cfg = wzp_transport::client_config();
-            let start = Instant::now();
-
-            let conn_result = tokio::time::timeout(
-                std::time::Duration::from_secs(3),
-                wzp_transport::connect(&endpoint, addr, "ping", client_cfg),
-            )
-            .await;
-
-            // Always close endpoint to prevent resource leaks
-            endpoint.close(0u32.into(), b"done");
-
-            let conn = conn_result.map_err(|_| anyhow::anyhow!("timeout"))??;
-            let rtt_ms = start.elapsed().as_millis() as u64;
-            let server_fp = conn
-                .peer_identity()
-                .and_then(|id| id.downcast::<Vec<rustls::pki_types::CertificateDer>>().ok())
-                .and_then(|certs| certs.first().map(|c| {
-                    use std::hash::{Hash, Hasher};
-                    let mut h = std::collections::hash_map::DefaultHasher::new();
-                    c.as_ref().hash(&mut h);
-                    format!("{:016x}", h.finish())
-                }))
-                .unwrap_or_default();
-            conn.close(0u32.into(), b"ping");
-
-            Ok::<_, anyhow::Error>(format!(r#"{{"rtt_ms":{},"server_fingerprint":"{}"}}"#, rtt_ms, server_fp))
-        });
-
-        // Shutdown runtime cleanly with timeout
-        rt.shutdown_timeout(std::time::Duration::from_millis(500));
-        result
-    }
-
-    /// Start persistent signaling connection for direct calls.
-    /// Spawns a background task that maintains the `_signal` connection.
-    pub fn start_signaling(
-        &mut self,
-        relay_addr: &str,
-        seed_hex: &str,
-        token: Option<&str>,
-        alias: Option<&str>,
-    ) -> Result<(), anyhow::Error> {
-        use wzp_proto::{MediaTransport, SignalMessage};
-
-        let addr: SocketAddr = relay_addr.parse()?;
-        let seed = if seed_hex.is_empty() {
-            wzp_crypto::Seed::generate()
-        } else {
-            wzp_crypto::Seed::from_hex(seed_hex).map_err(|e| anyhow::anyhow!(e))?
-        };
-        let identity = seed.derive_identity();
-        let pub_id = identity.public_identity();
-        let identity_pub = *pub_id.signing.as_bytes();
-        let fp = pub_id.fingerprint.to_string();
-        let token = token.map(|s| s.to_string());
-        let alias = alias.map(|s| s.to_string());
-        let state = self.state.clone();
-        let seed_bytes = seed.0;
-
-        info!(fingerprint = %fp, relay = %addr, "starting signaling");
-
-        // Create runtime for signaling (separate from call runtime)
-        let rt = tokio::runtime::Builder::new_multi_thread()
-            .worker_threads(1)
-            .enable_all()
-            .build()?;
-
-        let signal_state = state.clone();
-        rt.spawn(async move {
-            let _ = rustls::crypto::ring::default_provider().install_default();
-            let bind: SocketAddr = "0.0.0.0:0".parse().unwrap();
-            let endpoint = match wzp_transport::create_endpoint(bind, None) {
-                Ok(e) => e,
-                Err(e) => { error!("signal endpoint: {e}"); return; }
-            };
-            let client_cfg = wzp_transport::client_config();
-            let conn = match wzp_transport::connect(&endpoint, addr, "_signal", client_cfg).await {
-                Ok(c) => c,
-                Err(e) => { error!("signal connect: {e}"); return; }
-            };
-            let transport = std::sync::Arc::new(wzp_transport::QuinnTransport::new(conn));
-
-            // Auth if token provided
-            if let Some(ref tok) = token {
-                let _ = transport.send_signal(&SignalMessage::AuthToken { token: tok.clone() }).await;
-            }
-
-            // Register presence
-            let _ = transport.send_signal(&SignalMessage::RegisterPresence {
-                identity_pub,
-                signature: vec![],
-                alias: alias.clone(),
-            }).await;
-
-            // Wait for ack
-            match transport.recv_signal().await {
-                Ok(Some(SignalMessage::RegisterPresenceAck { success: true, .. })) => {
-                    info!(fingerprint = %fp, "signal: registered");
-                    let mut stats = signal_state.stats.lock().unwrap();
-                    stats.state = crate::stats::CallState::Registered;
-                }
-                other => {
-                    error!("signal registration failed: {other:?}");
-                    return;
-                }
-            }
-
-            // Signal recv loop
-            loop {
-                if !signal_state.running.load(Ordering::Relaxed) {
-                    break;
-                }
-                match transport.recv_signal().await {
-                    Ok(Some(SignalMessage::CallRinging { call_id })) => {
-                        info!(call_id = %call_id, "signal: ringing");
-                        let mut stats = signal_state.stats.lock().unwrap();
-                        stats.state = crate::stats::CallState::Ringing;
-                    }
-                    Ok(Some(SignalMessage::DirectCallOffer { caller_fingerprint, caller_alias, call_id, .. })) => {
-                        info!(from = %caller_fingerprint, call_id = %call_id, "signal: incoming call");
-                        let mut stats = signal_state.stats.lock().unwrap();
-                        stats.state = crate::stats::CallState::IncomingCall;
-                        stats.incoming_call_id = Some(call_id);
-                        stats.incoming_caller_fp = Some(caller_fingerprint);
-                        stats.incoming_caller_alias = caller_alias;
-                    }
-                    Ok(Some(SignalMessage::DirectCallAnswer { call_id, accept_mode, .. })) => {
-                        info!(call_id = %call_id, mode = ?accept_mode, "signal: call answered");
-                    }
-                    Ok(Some(SignalMessage::CallSetup { call_id, room, relay_addr })) => {
-                        info!(call_id = %call_id, room = %room, relay = %relay_addr, "signal: call setup");
-                        // Connect to media room via the existing start_call mechanism
-                        // Store the room info so Kotlin can call startCall with it
-                        let mut stats = signal_state.stats.lock().unwrap();
-                        stats.state = crate::stats::CallState::Connecting;
-                        // Store call setup info for Kotlin to pick up
-                        stats.incoming_call_id = Some(format!("{relay_addr}|{room}"));
-                    }
-                    Ok(Some(SignalMessage::Hangup { reason })) => {
-                        info!(reason = ?reason, "signal: call ended by remote");
-                        let mut stats = signal_state.stats.lock().unwrap();
-                        stats.state = crate::stats::CallState::Closed;
-                        stats.incoming_call_id = None;
-                        stats.incoming_caller_fp = None;
-                        stats.incoming_caller_alias = None;
-                    }
-                    Ok(Some(_)) => {}
-                    Ok(None) => {
-                        info!("signal: connection closed");
-                        break;
-                    }
-                    Err(e) => {
-                        error!("signal recv error: {e}");
-                        break;
-                    }
-                }
-            }
-
-            let mut stats = signal_state.stats.lock().unwrap();
-            stats.state = crate::stats::CallState::Closed;
-        });
-
-        self.tokio_runtime = Some(rt);
-        Ok(())
-    }
-
-    /// Place a direct call to a target fingerprint via the signal connection.
-    pub fn place_call(&self, target_fingerprint: &str) -> Result<(), anyhow::Error> {
-        let _ = self.state.command_tx.send(EngineCommand::PlaceCall {
-            target_fingerprint: target_fingerprint.to_string(),
-        });
-        Ok(())
-    }
-
-    /// Answer an incoming direct call.
-    pub fn answer_call(&self, call_id: &str, mode: wzp_proto::CallAcceptMode) -> Result<(), anyhow::Error> {
-        let _ = self.state.command_tx.send(EngineCommand::AnswerCall {
-            call_id: call_id.to_string(),
-            accept_mode: mode,
-        });
-        Ok(())
-    }
-
     pub fn set_mute(&self, muted: bool) {
         self.state.muted.store(muted, Ordering::Relaxed);
     }
@@ -454,7 +227,6 @@ async fn run_call(
     room: &str,
     identity_seed: &[u8; 32],
     profile: QualityProfile,
-    auto_profile: bool,
     alias: Option<&str>,
     state: Arc<EngineState>,
 ) -> Result<(), anyhow::Error> {
@@ -489,9 +261,6 @@ async fn run_call(
         ephemeral_pub,
         signature,
         supported_profiles: vec![
-            QualityProfile::STUDIO_64K,
-            QualityProfile::STUDIO_48K,
-            QualityProfile::STUDIO_32K,
             QualityProfile::GOOD,
             QualityProfile::DEGRADED,
             QualityProfile::CATASTROPHIC,
@@ -506,8 +275,8 @@ async fn run_call(
         .await?
         .ok_or_else(|| anyhow::anyhow!("connection closed before CallAnswer"))?;
 
-    let (relay_ephemeral_pub, chosen_profile) = match answer {
+    let relay_ephemeral_pub = match answer {
-        SignalMessage::CallAnswer { ephemeral_pub, chosen_profile, .. } => (ephemeral_pub, chosen_profile),
+        SignalMessage::CallAnswer { ephemeral_pub, .. } => ephemeral_pub,
         other => {
             return Err(anyhow::anyhow!(
                 "expected CallAnswer, got {:?}",
@@ -516,28 +285,19 @@ async fn run_call(
         }
     };
 
-    // Auto mode: use the relay's chosen profile instead of the local preference
-    let profile = if auto_profile {
-        info!(chosen = ?chosen_profile.codec, "auto mode: using relay's chosen profile");
-        chosen_profile
-    } else {
-        profile
-    };
-
     let _session = kx.derive_session(&relay_ephemeral_pub)?;
-    info!(codec = ?profile.codec, "handshake complete, call active");
+    info!("handshake complete, call active");
 
     {
         let mut stats = state.stats.lock().unwrap();
         stats.state = CallState::Active;
     }
 
-    // Initialize codec (Opus or Codec2 based on profile).
+    // Initialize Opus codec
-    // Phase 3c: decoder is a concrete AdaptiveDecoder (not Box<dyn
+    let mut encoder =
-    // AudioDecoder>) so the recv task can call reconstruct_from_dred on
+        OpusEncoder::new(profile).map_err(|e| anyhow::anyhow!("opus encoder init: {e}"))?;
-    // gaps detected via sequence tracking.
+    let mut decoder =
-    let mut encoder = wzp_codec::create_encoder(profile);
+        OpusDecoder::new(profile).map_err(|e| anyhow::anyhow!("opus decoder init: {e}"))?;
-    let mut decoder = AdaptiveDecoder::new(profile).expect("failed to create adaptive decoder");
 
     // Initialize FEC encoder/decoder
     let mut fec_enc = wzp_fec::create_encoder(&profile);
@@ -547,37 +307,21 @@ async fn run_call(
     let mut capture_agc = AutoGainControl::new();
     let mut playout_agc = AutoGainControl::new();
 
-    let mut frame_samples = frame_samples_for(&profile);
     info!(
-        codec = ?profile.codec,
         fec_ratio = profile.fec_ratio,
         frames_per_block = profile.frames_per_block,
-        frame_ms = profile.frame_duration_ms,
+        "codec + FEC + AGC initialized (48kHz mono, 20ms frames)"
-        frame_samples,
-        "codec + FEC + AGC initialized"
     );
 
-    {
-        let mut stats = state.stats.lock().unwrap();
-        stats.current_codec = format!("{:?}", profile.codec);
-        stats.auto_mode = auto_profile;
-    }
-
     let seq = AtomicU16::new(0);
     let ts = AtomicU32::new(0);
     let transport_recv = transport.clone();
 
-    // Adaptive quality: shared AtomicU8 between recv task (writer) and send task (reader).
+    // Pre-allocate buffers
-    // 0xFF = no change pending, 0-5 = index into PROFILES array.
+    let mut capture_buf = vec![0i16; FRAME_SAMPLES];
-    let pending_profile = Arc::new(AtomicU8::new(PROFILE_NO_CHANGE));
-    let pending_profile_recv = pending_profile.clone();
-
-    // Pre-allocate buffers (sized for current profile)
-    let mut capture_buf = vec![0i16; frame_samples];
     let mut encode_buf = vec![0u8; encoder.max_frame_bytes()];
     let mut frame_in_block: u8 = 0;
     let mut block_id: u8 = 0;
-    let mut current_profile = profile;
 
     // Send task: capture ring → Opus encode → FEC → MediaPackets
     //
@@ -603,47 +347,14 @@ async fn run_call(
                 break;
             }
 
-            // Check for adaptive profile switch from recv task
-            if auto_profile {
-                let p = pending_profile.swap(PROFILE_NO_CHANGE, Ordering::Acquire);
-                if p != PROFILE_NO_CHANGE {
-                    if let Some(new_profile) = index_to_profile(p) {
-                        info!(
-                            from = ?current_profile.codec,
-                            to = ?new_profile.codec,
-                            "auto: switching encoder profile"
-                        );
-                        if let Err(e) = encoder.set_profile(new_profile) {
-                            warn!("encoder set_profile failed: {e}");
-                        } else {
-                            fec_enc = wzp_fec::create_encoder(&new_profile);
-                            current_profile = new_profile;
-                            let new_frame_samples = frame_samples_for(&new_profile);
-                            if new_frame_samples != frame_samples {
-                                frame_samples = new_frame_samples;
-                                capture_buf.resize(frame_samples, 0);
-                            }
-                            encode_buf.resize(encoder.max_frame_bytes(), 0);
-                            // Reset FEC block state for clean switch
-                            frame_in_block = 0;
-                            block_id = block_id.wrapping_add(1);
-                            // Update stats with new codec
-                            if let Ok(mut stats) = state.stats.lock() {
-                                stats.current_codec = format!("{:?}", new_profile.codec);
-                            }
-                        }
-                    }
-                }
-            }
-
             let avail = state.capture_ring.available();
-            if avail < frame_samples {
+            if avail < FRAME_SAMPLES {
                 tokio::time::sleep(std::time::Duration::from_millis(5)).await;
                 continue;
             }
 
             let read = state.capture_ring.read(&mut capture_buf);
-            if read < frame_samples {
+            if read < FRAME_SAMPLES {
                 continue;
             }
 
@@ -670,34 +381,21 @@ async fn run_call(
             t_opus_us += t0.elapsed().as_micros() as u64;
             let encoded = &encode_buf[..encoded_len];
 
-            // Phase 2: Opus tiers bypass RaptorQ (DRED handles loss recovery
-            // at the codec layer). Codec2 tiers keep RaptorQ unchanged.
-            let is_opus = current_profile.codec.is_opus();
-            let (hdr_fec_block, hdr_fec_symbol, hdr_fec_ratio) = if is_opus {
-                (0u8, 0u8, 0u8)
-            } else {
-                (
-                    block_id,
-                    frame_in_block,
-                    MediaHeader::encode_fec_ratio(current_profile.fec_ratio),
-                )
-            };
-
             // Build source packet
             let s = seq.fetch_add(1, Ordering::Relaxed);
-            let t = ts.fetch_add(frame_samples as u32, Ordering::Relaxed);
+            let t = ts.fetch_add(FRAME_SAMPLES as u32, Ordering::Relaxed);
 
             let source_pkt = MediaPacket {
                 header: MediaHeader {
                     version: 0,
                     is_repair: false,
-                    codec_id: current_profile.codec,
+                    codec_id: profile.codec,
                     has_quality_report: false,
-                    fec_ratio_encoded: hdr_fec_ratio,
+                    fec_ratio_encoded: MediaHeader::encode_fec_ratio(profile.fec_ratio),
                     seq: s,
                     timestamp: t,
-                    fec_block: hdr_fec_block,
+                    fec_block: block_id,
-                    fec_symbol: hdr_fec_symbol,
+                    fec_symbol: frame_in_block,
                     reserved: 0,
                     csrc_count: 0,
                 },
@@ -727,18 +425,16 @@ async fn run_call(
             t_send_us += t0.elapsed().as_micros() as u64;
             frames_sent += 1;
 
-            // Codec2-only: feed RaptorQ and emit repair packets when the
+            // Feed encoded frame to FEC encoder
-            // block is full. Opus tiers skip this entire block — DRED
-            // (enabled in Phase 1) provides codec-layer loss recovery.
             let t0 = Instant::now();
-            if !is_opus {
             if let Err(e) = fec_enc.add_source_symbol(encoded) {
                 warn!("fec add_source error: {e}");
             }
             frame_in_block += 1;
 
-                if frame_in_block >= current_profile.frames_per_block {
+            // When block is full, generate repair packets
-                    match fec_enc.generate_repair(current_profile.fec_ratio) {
+            if frame_in_block >= profile.frames_per_block {
+                match fec_enc.generate_repair(profile.fec_ratio) {
                     Ok(repairs) => {
                         let repair_count = repairs.len();
                         for (sym_idx, repair_data) in repairs {
@@ -747,10 +443,10 @@ async fn run_call(
                                 header: MediaHeader {
                                     version: 0,
                                     is_repair: true,
-                                        codec_id: current_profile.codec,
+                                    codec_id: profile.codec,
                                     has_quality_report: false,
                                     fec_ratio_encoded: MediaHeader::encode_fec_ratio(
-                                            current_profile.fec_ratio,
+                                        profile.fec_ratio,
                                     ),
                                     seq: rs,
                                     timestamp: t,
@@ -773,7 +469,7 @@ async fn run_call(
                             info!(
                                 block_id,
                                 repair_count,
-                                    fec_ratio = current_profile.fec_ratio,
+                                fec_ratio = profile.fec_ratio,
                                 "FEC block complete"
                             );
                         }
@@ -787,7 +483,6 @@ async fn run_call(
                 block_id = block_id.wrapping_add(1);
                 frame_in_block = 0;
             }
-            }
             t_fec_us += t0.elapsed().as_micros() as u64;
             t_frames += 1;
 
@@ -816,8 +511,8 @@ async fn run_call(
         info!(frames_sent, frames_dropped, send_errors, "send task ended");
     };
 
-    // Pre-allocate decode buffer (max size to handle any incoming codec)
+    // Pre-allocate decode buffer
-    let mut decode_buf = vec![0i16; MAX_FRAME_SAMPLES];
+    let mut decode_buf = vec![0i16; FRAME_SAMPLES];
 
     // Recv task: MediaPackets → FEC decode → Opus decode → playout ring
     let recv_task = async {
@@ -827,29 +522,7 @@ async fn run_call(
         let mut last_recv_instant = Instant::now();
         let mut max_recv_gap_ms: u64 = 0;
         let mut last_stats_log = Instant::now();
-        let mut quality_ctrl = AdaptiveQualityController::new();
+        info!("recv task started (Opus + RaptorQ FEC)");
-        let mut last_peer_codec: Option<CodecId> = None;
-
-        // Phase 3c: DRED reconstruction state. Unlike the desktop
-        // CallDecoder (which sits behind a jitter buffer that emits
-        // Missing signals), engine.rs reads packets directly from the
-        // transport and decodes straight into the playout ring. Gap
-        // detection is therefore done via sequence-number tracking:
-        // when a packet arrives with seq > expected_seq, the frames in
-        // between are missing and we attempt to reconstruct them via
-        // DRED before decoding the newly-arrived packet.
-        let mut dred_decoder =
-            DredDecoderHandle::new().expect("opus_dred_decoder_create failed");
-        let mut dred_parse_scratch =
-            DredState::new().expect("opus_dred_alloc failed (scratch)");
-        let mut last_good_dred =
-            DredState::new().expect("opus_dred_alloc failed (good state)");
-        let mut last_good_dred_seq: Option<u16> = None;
-        let mut expected_seq: Option<u16> = None;
-        let mut dred_reconstructions: u64 = 0;
-        let mut classical_plc_invocations: u64 = 0;
-
-        info!("recv task started (Opus + DRED + Codec2/RaptorQ)");
         loop {
             if !state.running.load(Ordering::Relaxed) {
                 break;
@@ -871,181 +544,20 @@ async fn run_call(
                         );
                     }
 
-                    // Adaptive quality: ingest quality reports from relay
-                    if auto_profile {
-                        if let Some(ref qr) = pkt.quality_report {
-                            if let Some(new_profile) = quality_ctrl.observe(qr) {
-                                let idx = profile_to_index(&new_profile);
-                                info!(
-                                    loss = qr.loss_percent(),
-                                    rtt = qr.rtt_ms(),
-                                    tier = ?quality_ctrl.tier(),
-                                    to = ?new_profile.codec,
-                                    "auto: quality adapter recommends switch"
-                                );
-                                pending_profile_recv.store(idx, Ordering::Release);
-                            }
-                        }
-                    }
-
                     let is_repair = pkt.header.is_repair;
                     let pkt_block = pkt.header.fec_block;
                     let pkt_symbol = pkt.header.fec_symbol;
-                    let pkt_is_opus = pkt.header.codec_id.is_opus();
 
-                    // Phase 2: Opus packets bypass RaptorQ entirely — DRED
+                    // Feed every packet (source + repair) to FEC decoder
-                    // (enabled Phase 1) handles codec-layer loss recovery,
-                    // and feeding these symbols into the RaptorQ decoder
-                    // would accumulate block_id=0 duplicates that never
-                    // decode. Codec2 packets still feed RaptorQ.
-                    if !pkt_is_opus {
                     let _ = fec_dec.add_symbol(
                         pkt_block,
                         pkt_symbol,
                         is_repair,
                         &pkt.payload,
                     );
-                    }
 
                     // Source packets: decode directly
-                    if !is_repair && pkt.header.codec_id != CodecId::ComfortNoise {
+                    if !is_repair {
-                        // Switch decoder to match incoming codec if different
-                        if pkt.header.codec_id != decoder.codec_id() {
-                            let switch_profile = match pkt.header.codec_id {
-                                CodecId::Opus24k => QualityProfile::GOOD,
-                                CodecId::Opus6k => QualityProfile::DEGRADED,
-                                CodecId::Opus32k => QualityProfile::STUDIO_32K,
-                                CodecId::Opus48k => QualityProfile::STUDIO_48K,
-                                CodecId::Opus64k => QualityProfile::STUDIO_64K,
-                                CodecId::Codec2_1200 => QualityProfile::CATASTROPHIC,
-                                CodecId::Codec2_3200 => QualityProfile {
-                                    codec: CodecId::Codec2_3200,
-                                    fec_ratio: 0.5,
-                                    frame_duration_ms: 20,
-                                    frames_per_block: 5,
-                                },
-                                other => QualityProfile { codec: other, ..QualityProfile::GOOD },
-                            };
-                            info!(from = ?decoder.codec_id(), to = ?pkt.header.codec_id, "recv: switching decoder");
-                            let _ = decoder.set_profile(switch_profile);
-                            // Profile switch invalidates the cached DRED
-                            // state because samples_available is measured
-                            // in the old profile's sample rate. Reset the
-                            // tracking so we don't try to reconstruct with
-                            // stale offsets.
-                            last_good_dred_seq = None;
-                            expected_seq = None;
-                        }
-                        // Track peer codec for UI display
-                        if last_peer_codec != Some(pkt.header.codec_id) {
-                            last_peer_codec = Some(pkt.header.codec_id);
-                            if let Ok(mut stats) = state.stats.lock() {
-                                stats.peer_codec = format!("{:?}", pkt.header.codec_id);
-                            }
-                        }
-
-                        // Phase 3c: Opus path — parse DRED state out of
-                        // the current packet FIRST so last_good_dred
-                        // reflects the freshest available reconstruction
-                        // source, then attempt gap recovery against it
-                        // BEFORE decoding this packet's audio. Ordering
-                        // matters because the playout ring is FIFO — gap
-                        // samples must be written before this packet's
-                        // samples, which come next.
-                        if pkt_is_opus {
-                            // Update DRED state from the current packet.
-                            match dred_decoder.parse_into(&mut dred_parse_scratch, &pkt.payload) {
-                                Ok(available) if available > 0 => {
-                                    std::mem::swap(
-                                        &mut dred_parse_scratch,
-                                        &mut last_good_dred,
-                                    );
-                                    last_good_dred_seq = Some(pkt.header.seq);
-                                }
-                                Ok(_) => {
-                                    // Packet carried no DRED — keep cached state.
-                                }
-                                Err(e) => {
-                                    debug!("DRED parse error (ignored): {e}");
-                                }
-                            }
-
-                            // Detect and fill gap from last-expected to this packet.
-                            const MAX_GAP_FRAMES: u16 = 16;
-                            if let Some(expected) = expected_seq {
-                                let gap = pkt.header.seq.wrapping_sub(expected);
-                                if gap > 0 && gap <= MAX_GAP_FRAMES {
-                                    let current_profile_frame_samples =
-                                        (48_000 * profile.frame_duration_ms as i32) / 1000;
-                                    let available = last_good_dred.samples_available();
-                                    let pcm_slice_len =
-                                        current_profile_frame_samples as usize;
-
-                                    for gap_idx in 0..gap {
-                                        let missing_seq = expected.wrapping_add(gap_idx);
-                                        // Offset from the DRED anchor (last_good_dred_seq)
-                                        // back to the missing seq, in samples. Skip if
-                                        // the anchor is not ahead of missing (defensive).
-                                        let offset_samples = match last_good_dred_seq {
-                                            Some(anchor) => {
-                                                let delta = anchor.wrapping_sub(missing_seq);
-                                                if delta == 0 || delta > MAX_GAP_FRAMES {
-                                                    -1 // skip DRED, use PLC
-                                                } else {
-                                                    delta as i32 * current_profile_frame_samples
-                                                }
-                                            }
-                                            None => -1,
-                                        };
-
-                                        let reconstructed = if offset_samples > 0
-                                            && offset_samples <= available
-                                        {
-                                            decoder
-                                                .reconstruct_from_dred(
-                                                    &last_good_dred,
-                                                    offset_samples,
-                                                    &mut decode_buf[..pcm_slice_len],
-                                                )
-                                                .ok()
-                                        } else {
-                                            None
-                                        };
-
-                                        match reconstructed {
-                                            Some(samples) => {
-                                                playout_agc.process_frame(
-                                                    &mut decode_buf[..samples],
-                                                );
-                                                state
-                                                    .playout_ring
-                                                    .write(&decode_buf[..samples]);
-                                                dred_reconstructions += 1;
-                                                frames_decoded += 1;
-                                            }
-                                            None => {
-                                                // Fall through to classical PLC.
-                                                if let Ok(samples) =
-                                                    decoder.decode_lost(&mut decode_buf)
-                                                {
-                                                    playout_agc
-                                                        .process_frame(&mut decode_buf[..samples]);
-                                                    state
-                                                        .playout_ring
-                                                        .write(&decode_buf[..samples]);
-                                                    classical_plc_invocations += 1;
-                                                    frames_decoded += 1;
-                                                }
-                                            }
-                                        }
-                                    }
-                                }
-                            }
-
-                            // Advance the expected-seq tracker for the next arrival.
-                            expected_seq = Some(pkt.header.seq.wrapping_add(1));
-                        }
-
                         match decoder.decode(&pkt.payload, &mut decode_buf) {
                             Ok(samples) => {
                                 playout_agc.process_frame(&mut decode_buf[..samples]);
@@ -1057,21 +569,12 @@ async fn run_call(
                                 if let Ok(samples) = decoder.decode_lost(&mut decode_buf) {
                                     playout_agc.process_frame(&mut decode_buf[..samples]);
                                     state.playout_ring.write(&decode_buf[..samples]);
-                                    // This is a decode-error fallback (not a
-                                    // detected gap), so count it as PLC.
-                                    classical_plc_invocations += 1;
                                 }
                             }
                         }
                     }
 
-                    // Codec2-only: try FEC recovery and expire old blocks.
+                    // Try FEC recovery
-                    // Opus packets skip both — the Phase 2 Opus path has no
-                    // RaptorQ state to query or clean up. The `fec_recovered`
-                    // counter is now effectively Codec2-only, which is
-                    // correct because DRED reconstructions will be counted
-                    // separately once Phase 3 lands (new telemetry field).
-                    if !pkt_is_opus {
                     if let Ok(Some(recovered_frames)) = fec_dec.try_decode(pkt_block) {
                         fec_recovered += recovered_frames.len() as u64;
                         if fec_recovered % 50 == 1 {
@@ -1088,13 +591,10 @@ async fn run_call(
                     if pkt_block > 3 {
                         fec_dec.expire_before(pkt_block.wrapping_sub(3));
                     }
-                    }
 
                     let mut stats = state.stats.lock().unwrap();
                     stats.frames_decoded = frames_decoded;
                     stats.fec_recovered = fec_recovered;
-                    stats.dred_reconstructions = dred_reconstructions;
-                    stats.classical_plc_invocations = classical_plc_invocations;
                     drop(stats);
 
                     // Periodic stats every 5 seconds
@@ -1102,8 +602,6 @@ async fn run_call(
                         info!(
                             frames_decoded,
                             fec_recovered,
-                            dred_reconstructions,
-                            classical_plc_invocations,
                             recv_errors,
                             max_recv_gap_ms,
                             playout_avail = state.playout_ring.available(),
@@ -1174,7 +672,6 @@ async fn run_call(
                         .map(|p| crate::stats::RoomMember {
                             fingerprint: p.fingerprint.clone(),
                             alias: p.alias.clone(),
-                            relay_label: p.relay_label.clone(),
                         })
                         .collect();
                     let mut stats = state_signal.stats.lock().unwrap();

crates/wzp-android/src/jni_bridge.rs

@@ -21,24 +21,11 @@ unsafe fn handle_ref(handle: jlong) -> &'static mut EngineHandle {
     unsafe { &mut *(handle as *mut EngineHandle) }
 }
 
-/// 7 = auto (use relay's chosen profile)
-const PROFILE_AUTO: jint = 7;
-
 fn profile_from_int(value: jint) -> QualityProfile {
     match value {
-        0 => QualityProfile::GOOD,            // Opus 24k
+        1 => QualityProfile::DEGRADED,
-        1 => QualityProfile::DEGRADED,        // Opus 6k
+        2 => QualityProfile::CATASTROPHIC,
-        2 => QualityProfile::CATASTROPHIC,    // Codec2 1.2k
+        _ => QualityProfile::GOOD,
-        3 => QualityProfile {                 // Codec2 3.2k
-            codec: wzp_proto::CodecId::Codec2_3200,
-            fec_ratio: 0.5,
-            frame_duration_ms: 20,
-            frames_per_block: 5,
-        },
-        4 => QualityProfile::STUDIO_32K,      // Opus 32k
-        5 => QualityProfile::STUDIO_48K,      // Opus 48k
-        6 => QualityProfile::STUDIO_64K,      // Opus 64k
-        _ => QualityProfile::GOOD,            // auto falls back to GOOD
     }
 }
 
@@ -48,24 +35,17 @@ static INIT_LOGGING: Once = Once::new();
 /// Safe to call multiple times — only the first call takes effect.
 fn init_logging() {
     INIT_LOGGING.call_once(|| {
-        // Wrap in catch_unwind — sharded_slab allocation inside
+        // Use android_logger directly — tracing_subscriber::registry() allocates
-        // tracing_subscriber::registry() can crash on some Android
+        // a sharded_slab which causes SIGSEGV on Android 16 MTE devices.
-        // devices if scudo malloc fails during early initialization.
+        // android_logger is lightweight and doesn't trigger scudo crashes.
         let _ = std::panic::catch_unwind(|| {
-            use tracing_subscriber::layer::SubscriberExt;
+            android_logger::init_once(
-            use tracing_subscriber::util::SubscriberInitExt;
+                android_logger::Config::default()
-            use tracing_subscriber::EnvFilter;
+                    .with_max_level(log::LevelFilter::Info)
-            if let Ok(layer) = tracing_android::layer("wzp_android") {
+                    .with_tag("wzp"),
-                // Filter: INFO for our crates, WARN for everything else.
+            );
-                // The jni crate emits VERBOSE logs for every method lookup
+            // Bridge tracing → log so our tracing::info! macros work
-                // (~10 lines per JNI call, 100+ calls/sec) which floods logcat
+            let _ = tracing_log::LogTracer::init();
-                // and causes the system to kill the app.
-                let filter = EnvFilter::new("warn,wzp_android=info,wzp_proto=info,wzp_transport=info,wzp_codec=info,wzp_fec=info,wzp_crypto=info");
-                let _ = tracing_subscriber::registry()
-                    .with(layer)
-                    .with(filter)
-                    .try_init();
-            }
         });
     });
 }
@@ -98,7 +78,6 @@ pub unsafe extern "system" fn Java_com_wzp_engine_WzpEngine_nativeStartCall(
     seed_hex_j: JString,
     token_j: JString,
     alias_j: JString,
-    profile_j: jint,
 ) -> jint {
     let result = panic::catch_unwind(panic::AssertUnwindSafe(|| {
         let relay_addr: String = env.get_string(&relay_addr_j).map(|s| s.into()).unwrap_or_default();
@@ -124,8 +103,7 @@ pub unsafe extern "system" fn Java_com_wzp_engine_WzpEngine_nativeStartCall(
         }
 
         let config = CallStartConfig {
-            profile: profile_from_int(profile_j),
+            profile: QualityProfile::GOOD,
-            auto_profile: profile_j == PROFILE_AUTO,
             relay_addr,
             room,
             auth_token: if token.is_empty() { Vec::new() } else { token.into_bytes() },
@@ -333,22 +311,71 @@ pub unsafe extern "system" fn Java_com_wzp_engine_WzpEngine_nativeDestroy(
     }));
 }
 
-/// Ping a relay server — instance method, requires engine handle.
+/// Ping a relay server — returns JSON `{"rtt_ms":N,"server_fingerprint":"hex"}` or null on failure.
-/// Returns JSON `{"rtt_ms":N,"server_fingerprint":"hex"}` or null on failure.
+/// Does NOT require an engine handle — creates a temporary QUIC connection.
 #[unsafe(no_mangle)]
 pub unsafe extern "system" fn Java_com_wzp_engine_WzpEngine_nativePingRelay<'a>(
     mut env: JNIEnv<'a>,
     _class: JClass,
-    handle: jlong,
     relay_j: JString,
 ) -> jstring {
     let result = panic::catch_unwind(panic::AssertUnwindSafe(|| {
-        let h = unsafe { handle_ref(handle) };
         let relay: String = env.get_string(&relay_j).map(|s| s.into()).unwrap_or_default();
-        match h.engine.ping_relay(&relay) {
+        let addr: std::net::SocketAddr = match relay.parse() {
-            Ok(json) => Some(json),
+            Ok(a) => a,
-            Err(_) => None,
+            Err(_) => return None,
+        };
+
+        let _ = rustls::crypto::ring::default_provider().install_default();
+
+        let rt = match tokio::runtime::Builder::new_current_thread()
+            .enable_all()
+            .build()
+        {
+            Ok(rt) => rt,
+            Err(_) => return None,
+        };
+
+        rt.block_on(async {
+            let bind: std::net::SocketAddr = "0.0.0.0:0".parse().unwrap();
+            let endpoint = match wzp_transport::create_endpoint(bind, None) {
+                Ok(e) => e,
+                Err(_) => return None,
+            };
+            let client_cfg = wzp_transport::client_config();
+            let start = std::time::Instant::now();
+
+            match tokio::time::timeout(
+                std::time::Duration::from_secs(3),
+                wzp_transport::connect(&endpoint, addr, "ping", client_cfg),
+            )
+            .await
+            {
+                Ok(Ok(conn)) => {
+                    let rtt_ms = start.elapsed().as_millis() as u64;
+                    let server_fp = conn
+                        .peer_identity()
+                        .and_then(|id| {
+                            id.downcast::<Vec<rustls::pki_types::CertificateDer>>().ok()
+                        })
+                        .and_then(|certs| {
+                            certs.first().map(|c| {
+                                use std::hash::{Hash, Hasher};
+                                let mut h = std::collections::hash_map::DefaultHasher::new();
+                                c.as_ref().hash(&mut h);
+                                format!("{:016x}", h.finish())
+                            })
+                        })
+                        .unwrap_or_default();
+                    conn.close(0u32.into(), b"ping");
+                    Some(format!(
+                        r#"{{"rtt_ms":{},"server_fingerprint":"{}"}}"#,
+                        rtt_ms, server_fp
+                    ))
                 }
+                _ => None,
+            }
+        })
     }));
 
     let json = match result {
@@ -359,89 +386,3 @@ pub unsafe extern "system" fn Java_com_wzp_engine_WzpEngine_nativePingRelay<'a>(
         .map(|s| s.into_raw())
         .unwrap_or(JObject::null().into_raw())
 }
-
-// ── Direct calling JNI functions ──
-
-/// Start persistent signaling connection to relay for direct calls.
-/// Returns 0 on success, -1 on error.
-#[unsafe(no_mangle)]
-pub unsafe extern "system" fn Java_com_wzp_engine_WzpEngine_nativeStartSignaling<'a>(
-    mut env: JNIEnv<'a>,
-    _class: JClass,
-    handle: jlong,
-    relay_addr_j: JString,
-    seed_hex_j: JString,
-    token_j: JString,
-    alias_j: JString,
-) -> jint {
-    let result = panic::catch_unwind(panic::AssertUnwindSafe(|| {
-        let h = unsafe { handle_ref(handle) };
-        let relay_addr: String = env.get_string(&relay_addr_j).map(|s| s.into()).unwrap_or_default();
-        let seed_hex: String = env.get_string(&seed_hex_j).map(|s| s.into()).unwrap_or_default();
-        let token: String = env.get_string(&token_j).map(|s| s.into()).unwrap_or_default();
-        let alias: String = env.get_string(&alias_j).map(|s| s.into()).unwrap_or_default();
-
-        h.engine.start_signaling(
-            &relay_addr,
-            &seed_hex,
-            if token.is_empty() { None } else { Some(&token) },
-            if alias.is_empty() { None } else { Some(&alias) },
-        )
-    }));
-
-    match result {
-        Ok(Ok(())) => 0,
-        Ok(Err(e)) => { error!("start_signaling failed: {e}"); -1 }
-        Err(_) => { error!("start_signaling panicked"); -1 }
-    }
-}
-
-/// Place a direct call to a target fingerprint.
-/// Returns 0 on success, -1 on error.
-#[unsafe(no_mangle)]
-pub unsafe extern "system" fn Java_com_wzp_engine_WzpEngine_nativePlaceCall<'a>(
-    mut env: JNIEnv<'a>,
-    _class: JClass,
-    handle: jlong,
-    target_fp_j: JString,
-) -> jint {
-    let result = panic::catch_unwind(panic::AssertUnwindSafe(|| {
-        let h = unsafe { handle_ref(handle) };
-        let target: String = env.get_string(&target_fp_j).map(|s| s.into()).unwrap_or_default();
-        h.engine.place_call(&target)
-    }));
-
-    match result {
-        Ok(Ok(())) => 0,
-        Ok(Err(e)) => { error!("place_call failed: {e}"); -1 }
-        Err(_) => { error!("place_call panicked"); -1 }
-    }
-}
-
-/// Answer an incoming direct call.
-/// mode: 0=Reject, 1=AcceptTrusted, 2=AcceptGeneric
-#[unsafe(no_mangle)]
-pub unsafe extern "system" fn Java_com_wzp_engine_WzpEngine_nativeAnswerCall<'a>(
-    mut env: JNIEnv<'a>,
-    _class: JClass,
-    handle: jlong,
-    call_id_j: JString,
-    mode: jint,
-) -> jint {
-    let result = panic::catch_unwind(panic::AssertUnwindSafe(|| {
-        let h = unsafe { handle_ref(handle) };
-        let call_id: String = env.get_string(&call_id_j).map(|s| s.into()).unwrap_or_default();
-        let accept_mode = match mode {
-            0 => wzp_proto::CallAcceptMode::Reject,
-            1 => wzp_proto::CallAcceptMode::AcceptTrusted,
-            _ => wzp_proto::CallAcceptMode::AcceptGeneric,
-        };
-        h.engine.answer_call(&call_id, accept_mode)
-    }));
-
-    match result {
-        Ok(Ok(())) => 0,
-        Ok(Err(e)) => { error!("answer_call failed: {e}"); -1 }
-        Err(_) => { error!("answer_call panicked"); -1 }
-    }
-}

crates/wzp-android/src/lib.rs

@@ -8,19 +8,6 @@
 //!
 //! On non-Android targets, the Oboe C++ layer compiles as a stub,
 //! allowing `cargo check` and unit tests on the host.
-//!
-//! ## Status
-//!
-//! **Dead code as of the Tauri mobile rewrite.** The legacy Kotlin+JNI
-//! Android app that consumed this crate was replaced by a Tauri 2.x
-//! Mobile app (see `desktop/src-tauri/src/engine.rs` for the live
-//! Android audio recv path and `crates/wzp-native/` for the Oboe
-//! bridge). We keep this crate in the workspace for reference and to
-//! preserve the commit history, but it is not built by any shipping
-//! target. Allow the accumulated leftover warnings so CI/workspace
-//! checks stay clean — any real cleanup should happen as part of
-//! removing the crate entirely, not piecemeal.
-#![allow(dead_code, unused_imports, unused_variables, unused_mut)]
 
 pub mod audio_android;
 pub mod audio_ring;

crates/wzp-android/src/stats.rs

@@ -11,12 +11,6 @@ pub enum CallState {
     Active,
     Reconnecting,
     Closed,
-    /// Connected to relay signal channel, registered for direct calls.
-    Registered,
-    /// Outgoing call ringing on callee's side.
-    Ringing,
-    /// Incoming call received, waiting for user to accept/reject.
-    IncomingCall,
 }
 
 impl serde::Serialize for CallState {
@@ -27,9 +21,6 @@ impl serde::Serialize for CallState {
             CallState::Active => 2,
             CallState::Reconnecting => 3,
             CallState::Closed => 4,
-            CallState::Registered => 5,
-            CallState::Ringing => 6,
-            CallState::IncomingCall => 7,
         };
         serializer.serialize_u8(n)
     }
@@ -58,16 +49,8 @@ pub struct CallStats {
     pub frames_decoded: u64,
     /// Number of playout underruns (buffer empty when audio needed).
     pub underruns: u64,
-    /// Frames recovered by RaptorQ FEC (Codec2 tiers only; Opus bypasses
+    /// Frames recovered by FEC.
-    /// RaptorQ per Phase 2).
     pub fec_recovered: u64,
-    /// Phase 3c: Opus frames reconstructed via DRED side-channel data.
-    /// Only increments on the Opus tiers; always zero for Codec2.
-    pub dred_reconstructions: u64,
-    /// Phase 3c: Opus frames filled via classical Opus PLC because no DRED
-    /// state covered the gap, plus any decode-error fallbacks. Codec2 loss
-    /// also increments this counter via the Codec2 PLC path.
-    pub classical_plc_invocations: u64,
     /// Playout ring overflow count (reader was lapped by writer).
     pub playout_overflows: u64,
     /// Playout ring underrun count (reader found empty buffer).
@@ -76,28 +59,10 @@ pub struct CallStats {
     pub capture_overflows: u64,
     /// Current mic audio level (RMS of i16 samples, 0-32767).
     pub audio_level: u32,
-    /// Our current outgoing codec name (e.g. "Opus24k", "Codec2_1200").
-    pub current_codec: String,
-    /// Last seen incoming codec from other participants.
-    pub peer_codec: String,
-    /// Whether auto quality mode is active.
-    pub auto_mode: bool,
     /// Number of participants in the room (from last RoomUpdate).
     pub room_participant_count: u32,
     /// Participant list (fingerprint + optional alias) serialized as JSON array.
     pub room_participants: Vec<RoomMember>,
-    /// SAS code for verbal verification (None if not in a call).
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub sas_code: Option<u32>,
-    /// Incoming call info (present when state == IncomingCall).
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub incoming_call_id: Option<String>,
-    /// Fingerprint of the caller (present when state == IncomingCall).
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub incoming_caller_fp: Option<String>,
-    /// Alias of the caller (present when state == IncomingCall).
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub incoming_caller_alias: Option<String>,
 }
 
 /// A room member entry, serialized into the stats JSON.
@@ -105,5 +70,4 @@ pub struct CallStats {
 pub struct RoomMember {
     pub fingerprint: String,
     pub alias: Option<String>,
-    pub relay_label: Option<String>,
 }

crates/wzp-client/Cargo.toml

@@ -23,71 +23,10 @@ serde_json = "1"
 chrono = "0.4"
 rustls = { version = "0.23", default-features = false, features = ["ring", "std"] }
 cpal = { version = "0.15", optional = true }
-libc = "0.2"
-
-# coreaudio-rs is Apple-framework-only; gate it to macOS so enabling
-# the `vpio` feature from a non-macOS target builds cleanly instead of
-# pulling in a crate that can only link against Apple frameworks.
-[target.'cfg(target_os = "macos")'.dependencies]
-coreaudio-rs = { version = "0.11", optional = true }
-
-# Windows-only: direct WASAPI bindings for the `windows-aec` feature.
-# `windows` is Microsoft's official Rust COM bindings crate. We pull in
-# only the audio + COM subfeatures we need — the crate is organized as
-# a massive optional-feature tree, so enabling just these keeps compile
-# times reasonable (~5s for these features vs ~60s for the full crate).
-[target.'cfg(target_os = "windows")'.dependencies]
-windows = { version = "0.58", optional = true, features = [
-    "Win32_Foundation",
-    "Win32_Media_Audio",
-    "Win32_Security",
-    "Win32_System_Com",
-    "Win32_System_Com_StructuredStorage",
-    "Win32_System_Threading",
-    "Win32_System_Variant",
-] }
-
-# Linux-only: WebRTC AEC (Audio Processing Module) bindings for the
-# `linux-aec` feature. This is the 0.3.x line of the `tonarino/
-# webrtc-audio-processing` crate, which links against Debian's
-# `libwebrtc-audio-processing-dev` apt package (0.3-1+b1 on Bookworm).
-#
-# Note: we attempted the 2.x line with its `bundled` sub-feature first
-# (which would give us AEC3 instead of AEC2), but both the crates.io
-# tarball AND the upstream git `main` branch of webrtc-audio-processing-sys
-# 2.0.3 hit a `meson setup --reconfigure` bug where the build.rs passes
-# --reconfigure unconditionally even on first-run empty build dirs,
-# causing the bundled build to fail with "Directory does not contain a
-# valid build tree". The 0.x line doesn't use bundled mode and sidesteps
-# this entirely by linking the apt-provided library. AEC2 is older than
-# AEC3 but still the same algorithm family — this is what PulseAudio's
-# module-echo-cancel and PipeWire's filter-chain use by default on
-# current Debian-family distros.
-[target.'cfg(target_os = "linux")'.dependencies]
-webrtc-audio-processing = { version = "0.3", optional = true }
 
 [features]
 default = []
 audio = ["cpal"]
-# vpio enables coreaudio-rs but that dep is itself gated to macOS above,
-# so enabling this feature on Windows/Linux is a no-op (the audio_vpio
-# module is also #[cfg(target_os = "macos")] in lib.rs).
-vpio = ["dep:coreaudio-rs"]
-# windows-aec enables a direct WASAPI capture backend that opens the
-# microphone under AudioCategory_Communications, turning on Windows's
-# OS-level communications audio processing (AEC + noise suppression +
-# AGC). The `windows` dep is itself target-gated to Windows above, so
-# enabling this feature on non-Windows targets is a no-op (the
-# audio_wasapi module is also #[cfg(target_os = "windows")] in lib.rs).
-windows-aec = ["dep:windows"]
-# linux-aec enables a CPAL + WebRTC AEC3 capture/playback backend that
-# runs the WebRTC Audio Processing Module (same algo as Chrome / Zoom /
-# Teams) in-process, using the playback PCM as the reference signal for
-# echo cancellation. The webrtc-audio-processing dep is target-gated to
-# Linux above, so enabling this feature on non-Linux targets is a no-op
-# (the audio_linux_aec module is also #[cfg(target_os = "linux")] in
-# lib.rs).
-linux-aec = ["dep:webrtc-audio-processing"]
 
 [[bin]]
 name = "wzp-client"

crates/wzp-client/src/audio_io.rs

@@ -3,10 +3,12 @@
 //! Both structs use 48 kHz, mono, i16 format to match the WarzonePhone codec
 //! pipeline. Frames are 960 samples (20 ms at 48 kHz).
 //!
-//! Audio callbacks are **lock-free**: they read/write directly to an `AudioRing`
+//! The cpal `Stream` type is not `Send`, so each struct spawns a dedicated OS
-//! (atomic SPSC ring buffer). No Mutex, no channel, no allocation on the hot path.
+//! thread that owns the stream. The public API exposes only `Send + Sync`
+//! channel handles.
 
 use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::mpsc;
 use std::sync::Arc;
 
 use anyhow::{anyhow, Context};
@@ -14,8 +16,6 @@ use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
 use cpal::{SampleFormat, SampleRate, StreamConfig};
 use tracing::{info, warn};
 
-use crate::audio_ring::AudioRing;
-
 /// Number of samples per 20 ms frame at 48 kHz mono.
 pub const FRAME_SAMPLES: usize = 960;
 
@@ -23,25 +23,23 @@ pub const FRAME_SAMPLES: usize = 960;
 // AudioCapture
 // ---------------------------------------------------------------------------
 
-/// Captures microphone input via CPAL and writes PCM into a lock-free ring buffer.
+/// Captures microphone input and yields 960-sample PCM frames.
 ///
 /// The cpal stream lives on a dedicated OS thread; this handle is `Send + Sync`.
 pub struct AudioCapture {
-    ring: Arc<AudioRing>,
+    rx: mpsc::Receiver<Vec<i16>>,
     running: Arc<AtomicBool>,
 }
 
 impl AudioCapture {
     /// Create and start capturing from the default input device at 48 kHz mono.
     pub fn start() -> Result<Self, anyhow::Error> {
-        let ring = Arc::new(AudioRing::new());
+        let (tx, rx) = mpsc::sync_channel::<Vec<i16>>(64);
         let running = Arc::new(AtomicBool::new(true));
-
-        let (init_tx, init_rx) = std::sync::mpsc::sync_channel::<Result<(), String>>(1);
-
-        let ring_cb = ring.clone();
         let running_clone = running.clone();
 
+        let (init_tx, init_rx) = mpsc::sync_channel::<Result<(), String>>(1);
+
         std::thread::Builder::new()
             .name("wzp-audio-capture".into())
             .spawn(move || {
@@ -61,51 +59,53 @@ impl AudioCapture {
 
                     let use_f32 = !supports_i16_input(&device)?;
 
+                    let buf = Arc::new(std::sync::Mutex::new(
+                        Vec::<i16>::with_capacity(FRAME_SAMPLES),
+                    ));
                     let err_cb = |e: cpal::StreamError| {
                         warn!("input stream error: {e}");
                     };
 
-                    let logged_cb_size = Arc::new(AtomicBool::new(false));
-
                     let stream = if use_f32 {
-                        let ring = ring_cb.clone();
+                        let buf = buf.clone();
+                        let tx = tx.clone();
                         let running = running_clone.clone();
-                        let logged = logged_cb_size.clone();
                         device.build_input_stream(
                             &config,
                             move |data: &[f32], _: &cpal::InputCallbackInfo| {
                                 if !running.load(Ordering::Relaxed) {
                                     return;
                                 }
-                                if !logged.swap(true, Ordering::Relaxed) {
+                                let mut lock = buf.lock().unwrap();
-                                    eprintln!("[audio] capture callback: {} f32 samples", data.len());
+                                for &s in data {
+                                    lock.push(f32_to_i16(s));
+                                    if lock.len() == FRAME_SAMPLES {
+                                        let frame = lock.drain(..).collect();
+                                        let _ = tx.try_send(frame);
                                     }
-                                let mut tmp = [0i16; FRAME_SAMPLES];
-                                for chunk in data.chunks(FRAME_SAMPLES) {
-                                    let n = chunk.len();
-                                    for i in 0..n {
-                                        tmp[i] = f32_to_i16(chunk[i]);
-                                    }
-                                    ring.write(&tmp[..n]);
                                 }
                             },
                             err_cb,
                             None,
                         )?
                     } else {
-                        let ring = ring_cb.clone();
+                        let buf = buf.clone();
+                        let tx = tx.clone();
                         let running = running_clone.clone();
-                        let logged = logged_cb_size.clone();
                         device.build_input_stream(
                             &config,
                             move |data: &[i16], _: &cpal::InputCallbackInfo| {
                                 if !running.load(Ordering::Relaxed) {
                                     return;
                                 }
-                                if !logged.swap(true, Ordering::Relaxed) {
+                                let mut lock = buf.lock().unwrap();
-                                    eprintln!("[audio] capture callback: {} i16 samples", data.len());
+                                for &s in data {
+                                    lock.push(s);
+                                    if lock.len() == FRAME_SAMPLES {
+                                        let frame = lock.drain(..).collect();
+                                        let _ = tx.try_send(frame);
+                                    }
                                 }
-                                ring.write(data);
                             },
                             err_cb,
                             None,
@@ -114,6 +114,7 @@ impl AudioCapture {
 
                     stream.play().context("failed to start input stream")?;
 
+                    // Signal success to the caller before parking.
                     let _ = init_tx.send(Ok(()));
 
                     // Keep stream alive until stopped.
@@ -134,12 +135,15 @@ impl AudioCapture {
             .map_err(|_| anyhow!("capture thread exited before signaling"))?
             .map_err(|e| anyhow!("{e}"))?;
 
-        Ok(Self { ring, running })
+        Ok(Self { rx, running })
     }
 
-    /// Get a reference to the capture ring buffer for direct polling.
+    /// Read the next frame of 960 PCM samples (blocking until available).
-    pub fn ring(&self) -> &Arc<AudioRing> {
+    ///
-        &self.ring
+    /// Returns `None` when the stream has been stopped or the channel is
+    /// disconnected.
+    pub fn read_frame(&self) -> Option<Vec<i16>> {
+        self.rx.recv().ok()
     }
 
     /// Stop capturing.
@@ -148,35 +152,27 @@ impl AudioCapture {
     }
 }
 
-impl Drop for AudioCapture {
-    fn drop(&mut self) {
-        self.stop();
-    }
-}
-
 // ---------------------------------------------------------------------------
 // AudioPlayback
 // ---------------------------------------------------------------------------
 
-/// Plays PCM through the default output device, reading from a lock-free ring buffer.
+/// Plays PCM frames through the default output device at 48 kHz mono.
 ///
 /// The cpal stream lives on a dedicated OS thread; this handle is `Send + Sync`.
 pub struct AudioPlayback {
-    ring: Arc<AudioRing>,
+    tx: mpsc::SyncSender<Vec<i16>>,
     running: Arc<AtomicBool>,
 }
 
 impl AudioPlayback {
     /// Create and start playback on the default output device at 48 kHz mono.
     pub fn start() -> Result<Self, anyhow::Error> {
-        let ring = Arc::new(AudioRing::new());
+        let (tx, rx) = mpsc::sync_channel::<Vec<i16>>(64);
         let running = Arc::new(AtomicBool::new(true));
-
-        let (init_tx, init_rx) = std::sync::mpsc::sync_channel::<Result<(), String>>(1);
-
-        let ring_cb = ring.clone();
         let running_clone = running.clone();
 
+        let (init_tx, init_rx) = mpsc::sync_channel::<Result<(), String>>(1);
+
         std::thread::Builder::new()
             .name("wzp-audio-playback".into())
             .spawn(move || {
@@ -196,40 +192,62 @@ impl AudioPlayback {
 
                     let use_f32 = !supports_i16_output(&device)?;
 
+                    // Shared ring of samples the cpal callback drains from.
+                    let ring = Arc::new(std::sync::Mutex::new(
+                        std::collections::VecDeque::<i16>::with_capacity(FRAME_SAMPLES * 8),
+                    ));
+
+                    // Background drainer: moves frames from the mpsc channel into the ring.
+                    {
+                        let ring = ring.clone();
+                        let running = running_clone.clone();
+                        std::thread::Builder::new()
+                            .name("wzp-playback-drain".into())
+                            .spawn(move || {
+                                while running.load(Ordering::Relaxed) {
+                                    match rx.recv_timeout(std::time::Duration::from_millis(100)) {
+                                        Ok(frame) => {
+                                            let mut lock = ring.lock().unwrap();
+                                            lock.extend(frame);
+                                            while lock.len() > FRAME_SAMPLES * 16 {
+                                                lock.pop_front();
+                                            }
+                                        }
+                                        Err(mpsc::RecvTimeoutError::Timeout) => {}
+                                        Err(mpsc::RecvTimeoutError::Disconnected) => break,
+                                    }
+                                }
+                            })?;
+                    }
+
                     let err_cb = |e: cpal::StreamError| {
                         warn!("output stream error: {e}");
                     };
 
                     let stream = if use_f32 {
-                        let ring = ring_cb.clone();
+                        let ring = ring.clone();
                         device.build_output_stream(
                             &config,
                             move |data: &mut [f32], _: &cpal::OutputCallbackInfo| {
-                                let mut tmp = [0i16; FRAME_SAMPLES];
+                                let mut lock = ring.lock().unwrap();
-                                for chunk in data.chunks_mut(FRAME_SAMPLES) {
+                                for sample in data.iter_mut() {
-                                    let n = chunk.len();
+                                    *sample = match lock.pop_front() {
-                                    let read = ring.read(&mut tmp[..n]);
+                                        Some(s) => i16_to_f32(s),
-                                    for i in 0..read {
+                                        None => 0.0,
-                                        chunk[i] = i16_to_f32(tmp[i]);
+                                    };
-                                    }
-                                    // Fill remainder with silence if ring underran
-                                    for i in read..n {
-                                        chunk[i] = 0.0;
-                                    }
                                 }
                             },
                             err_cb,
                             None,
                         )?
                     } else {
-                        let ring = ring_cb.clone();
+                        let ring = ring.clone();
                         device.build_output_stream(
                             &config,
                             move |data: &mut [i16], _: &cpal::OutputCallbackInfo| {
-                                let read = ring.read(data);
+                                let mut lock = ring.lock().unwrap();
-                                // Fill remainder with silence if ring underran
+                                for sample in data.iter_mut() {
-                                for sample in &mut data[read..] {
+                                    *sample = lock.pop_front().unwrap_or(0);
-                                    *sample = 0;
                                 }
                             },
                             err_cb,
@@ -239,6 +257,7 @@ impl AudioPlayback {
 
                     stream.play().context("failed to start output stream")?;
 
+                    // Signal success to the caller before parking.
                     let _ = init_tx.send(Ok(()));
 
                     // Keep stream alive until stopped.
@@ -259,12 +278,12 @@ impl AudioPlayback {
             .map_err(|_| anyhow!("playback thread exited before signaling"))?
             .map_err(|e| anyhow!("{e}"))?;
 
-        Ok(Self { ring, running })
+        Ok(Self { tx, running })
     }
 
-    /// Get a reference to the playout ring buffer for direct writing.
+    /// Write a frame of PCM samples for playback.
-    pub fn ring(&self) -> &Arc<AudioRing> {
+    pub fn write_frame(&self, pcm: &[i16]) {
-        &self.ring
+        let _ = self.tx.try_send(pcm.to_vec());
     }
 
     /// Stop playback.
@@ -273,16 +292,11 @@ impl AudioPlayback {
     }
 }
 
-impl Drop for AudioPlayback {
-    fn drop(&mut self) {
-        self.stop();
-    }
-}
-
 // ---------------------------------------------------------------------------
 // Helpers
 // ---------------------------------------------------------------------------
 
+/// Check if the input device supports i16 at 48 kHz mono.
 fn supports_i16_input(device: &cpal::Device) -> Result<bool, anyhow::Error> {
     let supported = device
         .supported_input_configs()
@@ -299,6 +313,7 @@ fn supports_i16_input(device: &cpal::Device) -> Result<bool, anyhow::Error> {
     Ok(false)
 }
 
+/// Check if the output device supports i16 at 48 kHz mono.
 fn supports_i16_output(device: &cpal::Device) -> Result<bool, anyhow::Error> {
     let supported = device
         .supported_output_configs()

crates/wzp-client/src/audio_linux_aec.rs

@@ -1,537 +0,0 @@
-//! Linux AEC backend: CPAL capture + playback wired through the WebRTC Audio
-//! Processing Module (AEC3 + noise suppression + high-pass filter).
-//!
-//! This is the same algorithm used by Chrome WebRTC, Zoom, Teams, Jitsi, and
-//! any other "serious" Linux VoIP app. It runs in-process — no dependency on
-//! PulseAudio's module-echo-cancel or PipeWire's filter-chain, so it works
-//! identically on ALSA / PulseAudio / PipeWire systems.
-//!
-//! ## Architecture
-//!
-//! A single module-level `Arc<Mutex<Processor>>` is shared between the
-//! capture and playback paths. On each 20 ms frame (960 samples @ 48 kHz
-//! mono):
-//!
-//! - **Playback path**: `LinuxAecPlayback::start` spawns the usual CPAL
-//!   output thread, but wraps each chunk in a call to
-//!   `Processor::process_render_frame` **before** handing it to CPAL. That
-//!   gives APM an authoritative reference of exactly what's going out to
-//!   the speakers (same approach Zoom/Teams/Jitsi use). The AEC then knows
-//!   what to cancel when it sees echo in the capture stream.
-//!
-//! - **Capture path**: `LinuxAecCapture::start` spawns the usual CPAL
-//!   input thread, and runs `Processor::process_capture_frame` on each
-//!   incoming mic chunk **in place** before pushing it into the ring
-//!   buffer. The AEC subtracts the echo using the render reference it
-//!   saw on the playback side.
-//!
-//! APM is strict about frame size: it requires exactly 10 ms = 480 samples
-//! per call at 48 kHz. Our pipeline uses 20 ms = 960 samples, so each 20 ms
-//! frame is split into two 480-sample halves, APM is called twice, and the
-//! halves are stitched back together.
-//!
-//! APM only accepts f32 samples in `[-1.0, 1.0]`, so we convert i16 → f32
-//! before the call and f32 → i16 after (with clamping on the return path).
-//!
-//! ## Stream delay
-//!
-//! AEC needs to know roughly how long it takes between a sample being passed
-//! to `process_render_frame` and its echo showing up at `process_capture_frame`
-//! — i.e. the round trip through CPAL playback → speaker → air → microphone
-//! → CPAL capture. AEC3's internal estimator tracks this within a window
-//! around whatever hint we give it. We hardcode 60 ms as a reasonable
-//! starting point for typical Linux audio stacks; the delay estimator does
-//! the fine-tuning automatically.
-//!
-//! ## Thread safety
-//!
-//! The 0.3.x line of `webrtc-audio-processing` takes `&mut self` on both
-//! `process_capture_frame` and `process_render_frame`, so the `Processor`
-//! needs a `Mutex` around it for cross-thread sharing. The capture and
-//! playback threads each acquire the lock briefly (sub-millisecond per
-//! 10 ms frame) so contention is minimal at our frame rates.
-
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::{Arc, Mutex, OnceLock};
-
-use anyhow::{anyhow, Context};
-use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
-use cpal::{SampleFormat, SampleRate, StreamConfig};
-use tracing::{info, warn};
-use webrtc_audio_processing::{
-    Config, EchoCancellation, EchoCancellationSuppressionLevel, InitializationConfig,
-    NoiseSuppression, NoiseSuppressionLevel, Processor, NUM_SAMPLES_PER_FRAME,
-};
-
-use crate::audio_ring::AudioRing;
-
-/// 20 ms at 48 kHz, mono — matches the rest of the pipeline and the codec.
-pub const FRAME_SAMPLES: usize = 960;
-/// APM requires strict 10 ms frames at 48 kHz = 480 samples per call.
-/// Imported from the webrtc-audio-processing crate so we can't drift out
-/// of sync with whatever sample rate / frame length the C++ lib is using.
-const APM_FRAME_SAMPLES: usize = NUM_SAMPLES_PER_FRAME as usize;
-const APM_NUM_CHANNELS: usize = 1;
-/// Round-trip delay hint passed to APM; the estimator refines from here.
-/// 60 ms is a reasonable default for CPAL on ALSA / PulseAudio / PipeWire.
-#[allow(dead_code)]
-const STREAM_DELAY_MS: i32 = 60;
-
-// ---------------------------------------------------------------------------
-// Shared APM instance
-// ---------------------------------------------------------------------------
-
-/// Module-level lazily-initialized APM. Shared between capture and playback
-/// so they operate on the same echo-cancellation state — the render frames
-/// pushed by playback are what the capture path subtracts from the mic input.
-/// Wrapped in a Mutex because the 0.3.x Processor takes `&mut self` on both
-/// process_capture_frame and process_render_frame.
-static PROCESSOR: OnceLock<Arc<Mutex<Processor>>> = OnceLock::new();
-
-fn get_or_init_processor() -> anyhow::Result<Arc<Mutex<Processor>>> {
-    if let Some(p) = PROCESSOR.get() {
-        return Ok(p.clone());
-    }
-    let init_config = InitializationConfig {
-        num_capture_channels: APM_NUM_CHANNELS as i32,
-        num_render_channels: APM_NUM_CHANNELS as i32,
-        ..Default::default()
-    };
-    let mut processor = Processor::new(&init_config)
-        .map_err(|e| anyhow!("webrtc APM init failed: {e:?}"))?;
-
-    let config = Config {
-        echo_cancellation: Some(EchoCancellation {
-            suppression_level: EchoCancellationSuppressionLevel::High,
-            stream_delay_ms: Some(STREAM_DELAY_MS),
-            enable_delay_agnostic: true,
-            enable_extended_filter: true,
-        }),
-        noise_suppression: Some(NoiseSuppression {
-            suppression_level: NoiseSuppressionLevel::High,
-        }),
-        enable_high_pass_filter: true,
-        // AGC left off for now — it can fight the Opus encoder's own gain
-        // staging and the adaptive-quality controller. Add later if users
-        // report low mic levels.
-        ..Default::default()
-    };
-    processor.set_config(config);
-
-    let arc = Arc::new(Mutex::new(processor));
-    let _ = PROCESSOR.set(arc.clone());
-    info!(
-        stream_delay_ms = STREAM_DELAY_MS,
-        "webrtc APM initialized (AEC High + NS High + HPF, AGC off)"
-    );
-    Ok(arc)
-}
-
-// ---------------------------------------------------------------------------
-// Helpers: i16 ↔ f32 and APM frame processing
-// ---------------------------------------------------------------------------
-
-#[inline]
-fn i16_to_f32(s: i16) -> f32 {
-    s as f32 / 32768.0
-}
-
-#[inline]
-fn f32_to_i16(s: f32) -> i16 {
-    (s.clamp(-1.0, 1.0) * 32767.0) as i16
-}
-
-/// Feed a 20 ms (960-sample) playback frame to APM as the render reference.
-/// Splits into two 10 ms halves because APM is strict about frame size.
-/// Takes the Mutex-wrapped Processor and locks briefly around each call.
-fn push_render_frame_20ms(apm: &Mutex<Processor>, pcm: &[i16]) {
-    debug_assert_eq!(pcm.len(), FRAME_SAMPLES);
-    let mut buf = [0f32; APM_FRAME_SAMPLES];
-    for half in pcm.chunks_exact(APM_FRAME_SAMPLES) {
-        for (i, &s) in half.iter().enumerate() {
-            buf[i] = i16_to_f32(s);
-        }
-        match apm.lock() {
-            Ok(mut p) => {
-                if let Err(e) = p.process_render_frame(&mut buf) {
-                    warn!("webrtc APM process_render_frame failed: {e:?}");
-                }
-            }
-            Err(_) => {
-                warn!("webrtc APM mutex poisoned in render path");
-                return;
-            }
-        }
-    }
-}
-
-/// Run a 20 ms (960-sample) capture frame through APM's echo cancellation
-/// in place. Splits into two 10 ms halves, runs APM on each, stitches
-/// results back into the caller's buffer. Briefly holds the Mutex once
-/// per 10 ms half.
-fn process_capture_frame_20ms(apm: &Mutex<Processor>, pcm: &mut [i16]) {
-    debug_assert_eq!(pcm.len(), FRAME_SAMPLES);
-    let mut buf = [0f32; APM_FRAME_SAMPLES];
-    for half in pcm.chunks_exact_mut(APM_FRAME_SAMPLES) {
-        for (i, &s) in half.iter().enumerate() {
-            buf[i] = i16_to_f32(s);
-        }
-        match apm.lock() {
-            Ok(mut p) => {
-                if let Err(e) = p.process_capture_frame(&mut buf) {
-                    warn!("webrtc APM process_capture_frame failed: {e:?}");
-                }
-            }
-            Err(_) => {
-                warn!("webrtc APM mutex poisoned in capture path");
-                return;
-            }
-        }
-        for (i, d) in half.iter_mut().enumerate() {
-            *d = f32_to_i16(buf[i]);
-        }
-    }
-}
-
-// ---------------------------------------------------------------------------
-// LinuxAecCapture — CPAL mic + WebRTC AEC capture-side processing
-// ---------------------------------------------------------------------------
-
-/// Microphone capture with WebRTC AEC3 applied in place before the codec
-/// sees the samples. Mirrors the public API of `audio_io::AudioCapture` so
-/// downstream code doesn't change.
-pub struct LinuxAecCapture {
-    ring: Arc<AudioRing>,
-    running: Arc<AtomicBool>,
-}
-
-impl LinuxAecCapture {
-    pub fn start() -> Result<Self, anyhow::Error> {
-        // Eagerly init the APM so the playback side can find it already
-        // configured, and so init errors surface on the caller thread
-        // instead of silently failing inside the capture thread.
-        let apm = get_or_init_processor()?;
-
-        let ring = Arc::new(AudioRing::new());
-        let running = Arc::new(AtomicBool::new(true));
-
-        let (init_tx, init_rx) = std::sync::mpsc::sync_channel::<Result<(), String>>(1);
-
-        let ring_cb = ring.clone();
-        let running_clone = running.clone();
-        let apm_capture = apm.clone();
-
-        std::thread::Builder::new()
-            .name("wzp-audio-capture-linuxaec".into())
-            .spawn(move || {
-                let result = (|| -> Result<(), anyhow::Error> {
-                    let host = cpal::default_host();
-                    let device = host
-                        .default_input_device()
-                        .ok_or_else(|| anyhow!("no default input audio device found"))?;
-                    info!(device = %device.name().unwrap_or_default(), "LinuxAEC: using input device");
-
-                    let config = StreamConfig {
-                        channels: 1,
-                        sample_rate: SampleRate(48_000),
-                        buffer_size: cpal::BufferSize::Default,
-                    };
-
-                    let use_f32 = !supports_i16_input(&device)?;
-
-                    let err_cb = |e: cpal::StreamError| {
-                        warn!("LinuxAEC input stream error: {e}");
-                    };
-
-                    // Leftover buffer for when CPAL gives us partial frames.
-                    // We need exactly 960-sample chunks to feed APM.
-                    let leftover = std::sync::Mutex::new(Vec::<i16>::with_capacity(FRAME_SAMPLES * 4));
-
-                    let stream = if use_f32 {
-                        let ring = ring_cb.clone();
-                        let running = running_clone.clone();
-                        let apm = apm_capture.clone();
-                        device.build_input_stream(
-                            &config,
-                            move |data: &[f32], _: &cpal::InputCallbackInfo| {
-                                if !running.load(Ordering::Relaxed) {
-                                    return;
-                                }
-                                let mut lv = leftover.lock().unwrap();
-                                lv.reserve(data.len());
-                                for &s in data {
-                                    lv.push(f32_to_i16(s));
-                                }
-                                drain_frames_through_apm(&mut lv, &apm, &ring);
-                            },
-                            err_cb,
-                            None,
-                        )?
-                    } else {
-                        let ring = ring_cb.clone();
-                        let running = running_clone.clone();
-                        let apm = apm_capture.clone();
-                        device.build_input_stream(
-                            &config,
-                            move |data: &[i16], _: &cpal::InputCallbackInfo| {
-                                if !running.load(Ordering::Relaxed) {
-                                    return;
-                                }
-                                let mut lv = leftover.lock().unwrap();
-                                lv.extend_from_slice(data);
-                                drain_frames_through_apm(&mut lv, &apm, &ring);
-                            },
-                            err_cb,
-                            None,
-                        )?
-                    };
-
-                    stream.play().context("failed to start LinuxAEC input stream")?;
-                    let _ = init_tx.send(Ok(()));
-                    info!("LinuxAEC capture started (AEC3 active)");
-
-                    while running_clone.load(Ordering::Relaxed) {
-                        std::thread::park_timeout(std::time::Duration::from_millis(200));
-                    }
-                    drop(stream);
-                    Ok(())
-                })();
-
-                if let Err(e) = result {
-                    let _ = init_tx.send(Err(e.to_string()));
-                }
-            })?;
-
-        init_rx
-            .recv()
-            .map_err(|_| anyhow!("LinuxAEC capture thread exited before signaling"))?
-            .map_err(|e| anyhow!("{e}"))?;
-
-        Ok(Self { ring, running })
-    }
-
-    pub fn ring(&self) -> &Arc<AudioRing> {
-        &self.ring
-    }
-
-    pub fn stop(&self) {
-        self.running.store(false, Ordering::Relaxed);
-    }
-}
-
-impl Drop for LinuxAecCapture {
-    fn drop(&mut self) {
-        self.stop();
-    }
-}
-
-/// Pull whole 960-sample frames out of the leftover buffer, run them through
-/// APM's capture-side processing, and push to the ring. Leaves any partial
-/// sub-960 remainder in `leftover` for the next callback.
-fn drain_frames_through_apm(leftover: &mut Vec<i16>, apm: &Mutex<Processor>, ring: &AudioRing) {
-    let mut frame = [0i16; FRAME_SAMPLES];
-    while leftover.len() >= FRAME_SAMPLES {
-        frame.copy_from_slice(&leftover[..FRAME_SAMPLES]);
-        process_capture_frame_20ms(apm, &mut frame);
-        ring.write(&frame);
-        leftover.drain(..FRAME_SAMPLES);
-    }
-}
-
-// ---------------------------------------------------------------------------
-// LinuxAecPlayback — CPAL speaker output + WebRTC AEC render-side tee
-// ---------------------------------------------------------------------------
-
-/// Speaker playback with a render-side tee: each frame written to CPAL is
-/// ALSO fed to APM via `process_render_frame` as the echo-cancellation
-/// reference signal. This is the "tee the playback ring" approach (Zoom,
-/// Teams, Jitsi) — deterministic, does not depend on PulseAudio loopback or
-/// PipeWire monitor sources.
-pub struct LinuxAecPlayback {
-    ring: Arc<AudioRing>,
-    running: Arc<AtomicBool>,
-}
-
-impl LinuxAecPlayback {
-    pub fn start() -> Result<Self, anyhow::Error> {
-        let apm = get_or_init_processor()?;
-
-        let ring = Arc::new(AudioRing::new());
-        let running = Arc::new(AtomicBool::new(true));
-
-        let (init_tx, init_rx) = std::sync::mpsc::sync_channel::<Result<(), String>>(1);
-
-        let ring_cb = ring.clone();
-        let running_clone = running.clone();
-        let apm_render = apm.clone();
-
-        std::thread::Builder::new()
-            .name("wzp-audio-playback-linuxaec".into())
-            .spawn(move || {
-                let result = (|| -> Result<(), anyhow::Error> {
-                    let host = cpal::default_host();
-                    let device = host
-                        .default_output_device()
-                        .ok_or_else(|| anyhow!("no default output audio device found"))?;
-                    info!(device = %device.name().unwrap_or_default(), "LinuxAEC: using output device");
-
-                    let config = StreamConfig {
-                        channels: 1,
-                        sample_rate: SampleRate(48_000),
-                        buffer_size: cpal::BufferSize::Default,
-                    };
-
-                    let use_f32 = !supports_i16_output(&device)?;
-
-                    let err_cb = |e: cpal::StreamError| {
-                        warn!("LinuxAEC output stream error: {e}");
-                    };
-
-                    // Same 960-sample batching approach as the capture side:
-                    // CPAL may ask for N samples in a callback where N doesn't
-                    // divide 960. We accumulate partial frames in a Vec and
-                    // feed APM as soon as we have a whole 20 ms frame.
-                    let carry = std::sync::Mutex::new(Vec::<i16>::with_capacity(FRAME_SAMPLES * 4));
-
-                    let stream = if use_f32 {
-                        let ring = ring_cb.clone();
-                        let apm = apm_render.clone();
-                        device.build_output_stream(
-                            &config,
-                            move |data: &mut [f32], _: &cpal::OutputCallbackInfo| {
-                                fill_output_and_tee_f32(data, &ring, &apm, &carry);
-                            },
-                            err_cb,
-                            None,
-                        )?
-                    } else {
-                        let ring = ring_cb.clone();
-                        let apm = apm_render.clone();
-                        device.build_output_stream(
-                            &config,
-                            move |data: &mut [i16], _: &cpal::OutputCallbackInfo| {
-                                fill_output_and_tee_i16(data, &ring, &apm, &carry);
-                            },
-                            err_cb,
-                            None,
-                        )?
-                    };
-
-                    stream.play().context("failed to start LinuxAEC output stream")?;
-                    let _ = init_tx.send(Ok(()));
-                    info!("LinuxAEC playback started (render tee active)");
-
-                    while running_clone.load(Ordering::Relaxed) {
-                        std::thread::park_timeout(std::time::Duration::from_millis(200));
-                    }
-                    drop(stream);
-                    Ok(())
-                })();
-
-                if let Err(e) = result {
-                    let _ = init_tx.send(Err(e.to_string()));
-                }
-            })?;
-
-        init_rx
-            .recv()
-            .map_err(|_| anyhow!("LinuxAEC playback thread exited before signaling"))?
-            .map_err(|e| anyhow!("{e}"))?;
-
-        Ok(Self { ring, running })
-    }
-
-    pub fn ring(&self) -> &Arc<AudioRing> {
-        &self.ring
-    }
-
-    pub fn stop(&self) {
-        self.running.store(false, Ordering::Relaxed);
-    }
-}
-
-impl Drop for LinuxAecPlayback {
-    fn drop(&mut self) {
-        self.stop();
-    }
-}
-
-fn fill_output_and_tee_i16(
-    data: &mut [i16],
-    ring: &AudioRing,
-    apm: &Mutex<Processor>,
-    carry: &std::sync::Mutex<Vec<i16>>,
-) {
-    let read = ring.read(data);
-    for s in &mut data[read..] {
-        *s = 0;
-    }
-    tee_render_samples(data, apm, carry);
-}
-
-fn fill_output_and_tee_f32(
-    data: &mut [f32],
-    ring: &AudioRing,
-    apm: &Mutex<Processor>,
-    carry: &std::sync::Mutex<Vec<i16>>,
-) {
-    let mut tmp = vec![0i16; data.len()];
-    let read = ring.read(&mut tmp);
-    for s in &mut tmp[read..] {
-        *s = 0;
-    }
-    for (d, &s) in data.iter_mut().zip(tmp.iter()) {
-        *d = i16_to_f32(s);
-    }
-    tee_render_samples(&tmp, apm, carry);
-}
-
-/// Push CPAL-bound samples into APM's render-side input for echo cancellation.
-/// Uses a carry buffer to batch into exact 960-sample (20 ms) frames.
-fn tee_render_samples(samples: &[i16], apm: &Mutex<Processor>, carry: &std::sync::Mutex<Vec<i16>>) {
-    let mut lv = carry.lock().unwrap();
-    lv.extend_from_slice(samples);
-    while lv.len() >= FRAME_SAMPLES {
-        let mut frame = [0i16; FRAME_SAMPLES];
-        frame.copy_from_slice(&lv[..FRAME_SAMPLES]);
-        push_render_frame_20ms(apm, &frame);
-        lv.drain(..FRAME_SAMPLES);
-    }
-}
-
-// ---------------------------------------------------------------------------
-// CPAL format helpers (duplicated from audio_io.rs to keep the modules
-// independent — each backend file is a self-contained unit)
-// ---------------------------------------------------------------------------
-
-fn supports_i16_input(device: &cpal::Device) -> Result<bool, anyhow::Error> {
-    let supported = device
-        .supported_input_configs()
-        .context("failed to query input configs")?;
-    for cfg in supported {
-        if cfg.sample_format() == SampleFormat::I16
-            && cfg.min_sample_rate() <= SampleRate(48_000)
-            && cfg.max_sample_rate() >= SampleRate(48_000)
-            && cfg.channels() >= 1
-        {
-            return Ok(true);
-        }
-    }
-    Ok(false)
-}
-
-fn supports_i16_output(device: &cpal::Device) -> Result<bool, anyhow::Error> {
-    let supported = device
-        .supported_output_configs()
-        .context("failed to query output configs")?;
-    for cfg in supported {
-        if cfg.sample_format() == SampleFormat::I16
-            && cfg.min_sample_rate() <= SampleRate(48_000)
-            && cfg.max_sample_rate() >= SampleRate(48_000)
-            && cfg.channels() >= 1
-        {
-            return Ok(true);
-        }
-    }
-    Ok(false)
-}

crates/wzp-client/src/audio_ring.rs

@@ -1,122 +0,0 @@
-//! Lock-free SPSC ring buffer — "Reader-Detects-Lap" architecture.
-//!
-//! SPSC invariant: the producer ONLY writes `write_pos`, the consumer
-//! ONLY writes `read_pos`.  Neither thread touches the other's cursor.
-//!
-//! On overflow (writer laps the reader), the writer simply overwrites
-//! old buffer data.  The reader detects the lap via `available() >
-//! RING_CAPACITY` and snaps its own `read_pos` forward.
-//!
-//! Capacity is a power of 2 for bitmask indexing (no modulo).
-
-use std::sync::atomic::{AtomicU64, AtomicUsize, Ordering};
-
-/// Ring buffer capacity — power of 2 for bitmask indexing.
-/// 16384 samples = 341.3ms at 48kHz mono.
-const RING_CAPACITY: usize = 16384; // 2^14
-const RING_MASK: usize = RING_CAPACITY - 1;
-
-/// Lock-free single-producer single-consumer ring buffer for i16 PCM samples.
-pub struct AudioRing {
-    buf: Box<[i16]>,
-    /// Monotonically increasing write cursor. ONLY written by producer.
-    write_pos: AtomicUsize,
-    /// Monotonically increasing read cursor. ONLY written by consumer.
-    read_pos: AtomicUsize,
-    /// Incremented by reader when it detects it was lapped (overflow).
-    overflow_count: AtomicU64,
-    /// Incremented by reader when ring is empty (underrun).
-    underrun_count: AtomicU64,
-}
-
-// SAFETY: AudioRing is SPSC — one thread writes (producer), one reads (consumer).
-// The producer only writes write_pos. The consumer only writes read_pos.
-// Neither thread writes the other's cursor. Buffer indices are derived from
-// the owning thread's cursor, ensuring no concurrent access to the same index.
-unsafe impl Send for AudioRing {}
-unsafe impl Sync for AudioRing {}
-
-impl AudioRing {
-    pub fn new() -> Self {
-        debug_assert!(RING_CAPACITY.is_power_of_two());
-        Self {
-            buf: vec![0i16; RING_CAPACITY].into_boxed_slice(),
-            write_pos: AtomicUsize::new(0),
-            read_pos: AtomicUsize::new(0),
-            overflow_count: AtomicU64::new(0),
-            underrun_count: AtomicU64::new(0),
-        }
-    }
-
-    /// Number of samples available to read (clamped to capacity).
-    pub fn available(&self) -> usize {
-        let w = self.write_pos.load(Ordering::Acquire);
-        let r = self.read_pos.load(Ordering::Relaxed);
-        w.wrapping_sub(r).min(RING_CAPACITY)
-    }
-
-    /// Write samples into the ring. Returns number of samples written.
-    ///
-    /// If the ring is full, old data is silently overwritten.  The reader
-    /// will detect the lap and self-correct.  The writer NEVER touches
-    /// `read_pos`.
-    pub fn write(&self, samples: &[i16]) -> usize {
-        let count = samples.len().min(RING_CAPACITY);
-        let w = self.write_pos.load(Ordering::Relaxed);
-
-        for i in 0..count {
-            unsafe {
-                let ptr = self.buf.as_ptr() as *mut i16;
-                *ptr.add((w + i) & RING_MASK) = samples[i];
-            }
-        }
-
-        self.write_pos
-            .store(w.wrapping_add(count), Ordering::Release);
-        count
-    }
-
-    /// Read samples from the ring into `out`. Returns number of samples read.
-    ///
-    /// If the writer has lapped the reader (overflow), `read_pos` is snapped
-    /// forward to the oldest valid data.
-    pub fn read(&self, out: &mut [i16]) -> usize {
-        let w = self.write_pos.load(Ordering::Acquire);
-        let mut r = self.read_pos.load(Ordering::Relaxed);
-
-        let mut avail = w.wrapping_sub(r);
-
-        // Lap detection: writer has overwritten our unread data.
-        if avail > RING_CAPACITY {
-            r = w.wrapping_sub(RING_CAPACITY);
-            avail = RING_CAPACITY;
-            self.overflow_count.fetch_add(1, Ordering::Relaxed);
-        }
-
-        let count = out.len().min(avail);
-        if count == 0 {
-            if w == r {
-                self.underrun_count.fetch_add(1, Ordering::Relaxed);
-            }
-            return 0;
-        }
-
-        for i in 0..count {
-            out[i] = unsafe { *self.buf.as_ptr().add((r + i) & RING_MASK) };
-        }
-
-        self.read_pos
-            .store(r.wrapping_add(count), Ordering::Release);
-        count
-    }
-
-    /// Number of overflow events (reader was lapped by writer).
-    pub fn overflow_count(&self) -> u64 {
-        self.overflow_count.load(Ordering::Relaxed)
-    }
-
-    /// Number of underrun events (reader found empty buffer).
-    pub fn underrun_count(&self) -> u64 {
-        self.underrun_count.load(Ordering::Relaxed)
-    }
-}

crates/wzp-client/src/audio_vpio.rs

@@ -1,179 +0,0 @@
-//! macOS Voice Processing I/O — uses Apple's VoiceProcessingIO audio unit
-//! for hardware-accelerated echo cancellation, AGC, and noise suppression.
-//!
-//! VoiceProcessingIO is a combined input+output unit that knows what's going
-//! to the speaker, so it can cancel the echo from the mic signal internally.
-//! This is the same engine FaceTime and other Apple apps use.
-
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::Arc;
-
-use anyhow::Context;
-use coreaudio::audio_unit::audio_format::LinearPcmFlags;
-use coreaudio::audio_unit::render_callback::{self, data};
-use coreaudio::audio_unit::{AudioUnit, Element, IOType, SampleFormat, Scope, StreamFormat};
-use coreaudio::sys;
-use tracing::info;
-
-use crate::audio_ring::AudioRing;
-
-/// Number of samples per 20 ms frame at 48 kHz mono.
-pub const FRAME_SAMPLES: usize = 960;
-
-/// Combined capture + playback via macOS VoiceProcessingIO.
-///
-/// The OS handles AEC internally — no manual far-end feeding needed.
-pub struct VpioAudio {
-    capture_ring: Arc<AudioRing>,
-    playout_ring: Arc<AudioRing>,
-    _audio_unit: AudioUnit,
-    running: Arc<AtomicBool>,
-}
-
-impl VpioAudio {
-    /// Start VoiceProcessingIO with AEC enabled.
-    pub fn start() -> Result<Self, anyhow::Error> {
-        let capture_ring = Arc::new(AudioRing::new());
-        let playout_ring = Arc::new(AudioRing::new());
-        let running = Arc::new(AtomicBool::new(true));
-
-        let mut au = AudioUnit::new(IOType::VoiceProcessingIO)
-            .context("failed to create VoiceProcessingIO audio unit")?;
-
-        // Must uninitialize before configuring properties.
-        au.uninitialize()
-            .context("failed to uninitialize VPIO for configuration")?;
-
-        // Enable input (mic) on Element::Input (bus 1).
-        let enable: u32 = 1;
-        au.set_property(
-            sys::kAudioOutputUnitProperty_EnableIO,
-            Scope::Input,
-            Element::Input,
-            Some(&enable),
-        )
-        .context("failed to enable VPIO input")?;
-
-        // Output (speaker) is enabled by default on VPIO, but be explicit.
-        au.set_property(
-            sys::kAudioOutputUnitProperty_EnableIO,
-            Scope::Output,
-            Element::Output,
-            Some(&enable),
-        )
-        .context("failed to enable VPIO output")?;
-
-        // Configure stream format: 48kHz mono f32 non-interleaved
-        let stream_format = StreamFormat {
-            sample_rate: 48_000.0,
-            sample_format: SampleFormat::F32,
-            flags: LinearPcmFlags::IS_FLOAT
-                | LinearPcmFlags::IS_PACKED
-                | LinearPcmFlags::IS_NON_INTERLEAVED,
-            channels: 1,
-        };
-
-        let asbd = stream_format.to_asbd();
-
-        // Input: set format on Output scope of Input element
-        // (= the format the AU delivers to us from the mic)
-        au.set_property(
-            sys::kAudioUnitProperty_StreamFormat,
-            Scope::Output,
-            Element::Input,
-            Some(&asbd),
-        )
-        .context("failed to set input stream format")?;
-
-        // Output: set format on Input scope of Output element
-        // (= the format we feed to the AU for the speaker)
-        au.set_property(
-            sys::kAudioUnitProperty_StreamFormat,
-            Scope::Input,
-            Element::Output,
-            Some(&asbd),
-        )
-        .context("failed to set output stream format")?;
-
-        // Set up input callback (mic capture with AEC applied)
-        let cap_ring = capture_ring.clone();
-        let cap_running = running.clone();
-        let logged = Arc::new(AtomicBool::new(false));
-        au.set_input_callback(
-            move |args: render_callback::Args<data::NonInterleaved<f32>>| {
-                if !cap_running.load(Ordering::Relaxed) {
-                    return Ok(());
-                }
-                let mut buffers = args.data.channels();
-                if let Some(ch) = buffers.next() {
-                    if !logged.swap(true, Ordering::Relaxed) {
-                        eprintln!("[vpio] capture callback: {} f32 samples", ch.len());
-                    }
-                    let mut tmp = [0i16; FRAME_SAMPLES];
-                    for chunk in ch.chunks(FRAME_SAMPLES) {
-                        let n = chunk.len();
-                        for i in 0..n {
-                            tmp[i] = (chunk[i].clamp(-1.0, 1.0) * i16::MAX as f32) as i16;
-                        }
-                        cap_ring.write(&tmp[..n]);
-                    }
-                }
-                Ok(())
-            },
-        )
-        .context("failed to set input callback")?;
-
-        // Set up output callback (speaker playback — AEC uses this as reference)
-        let play_ring = playout_ring.clone();
-        au.set_render_callback(
-            move |mut args: render_callback::Args<data::NonInterleaved<f32>>| {
-                let mut buffers = args.data.channels_mut();
-                if let Some(ch) = buffers.next() {
-                    let mut tmp = [0i16; FRAME_SAMPLES];
-                    for chunk in ch.chunks_mut(FRAME_SAMPLES) {
-                        let n = chunk.len();
-                        let read = play_ring.read(&mut tmp[..n]);
-                        for i in 0..read {
-                            chunk[i] = tmp[i] as f32 / i16::MAX as f32;
-                        }
-                        for i in read..n {
-                            chunk[i] = 0.0;
-                        }
-                    }
-                }
-                Ok(())
-            },
-        )
-        .context("failed to set render callback")?;
-
-        au.initialize().context("failed to initialize VoiceProcessingIO")?;
-        au.start().context("failed to start VoiceProcessingIO")?;
-
-        info!("VoiceProcessingIO started (OS-level AEC enabled)");
-
-        Ok(Self {
-            capture_ring,
-            playout_ring,
-            _audio_unit: au,
-            running,
-        })
-    }
-
-    pub fn capture_ring(&self) -> &Arc<AudioRing> {
-        &self.capture_ring
-    }
-
-    pub fn playout_ring(&self) -> &Arc<AudioRing> {
-        &self.playout_ring
-    }
-
-    pub fn stop(&self) {
-        self.running.store(false, Ordering::Relaxed);
-    }
-}
-
-impl Drop for VpioAudio {
-    fn drop(&mut self) {
-        self.stop();
-    }
-}

crates/wzp-client/src/audio_wasapi.rs

@@ -1,332 +0,0 @@
-//! Direct WASAPI microphone capture with Windows's OS-level AEC enabled.
-//!
-//! Bypasses CPAL and opens the default capture endpoint directly via
-//! `IMMDeviceEnumerator` + `IAudioClient2::SetClientProperties`, setting
-//! `AudioClientProperties.eCategory = AudioCategory_Communications`. That's
-//! the switch that tells Windows "this is a VoIP call" — the OS then
-//! enables its communications audio processing chain (AEC, noise
-//! suppression, automatic gain control) for the stream. AEC operates at
-//! the OS level using the currently-playing audio as the reference
-//! signal, so it cancels echo from our CPAL playback (and any other app's
-//! audio) without us having to plumb a reference signal ourselves.
-//!
-//! Platform: Windows only, compiled only when the `windows-aec` feature
-//! is enabled. Mirrors the public API of `audio_io::AudioCapture` so
-//! `wzp-client`'s lib.rs can transparently re-export either one as
-//! `AudioCapture`.
-
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::Arc;
-
-use anyhow::{anyhow, Context};
-use tracing::{info, warn};
-use windows::core::{Interface, GUID};
-use windows::Win32::Foundation::{CloseHandle, BOOL, WAIT_OBJECT_0};
-use windows::Win32::Media::Audio::{
-    eCapture, eCommunications, AudioCategory_Communications, AudioClientProperties,
-    IAudioCaptureClient, IAudioClient, IAudioClient2, IMMDeviceEnumerator, MMDeviceEnumerator,
-    AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM,
-    AUDCLNT_STREAMFLAGS_EVENTCALLBACK, AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY, WAVEFORMATEX,
-    WAVE_FORMAT_PCM,
-};
-use windows::Win32::System::Com::{
-    CoCreateInstance, CoInitializeEx, CoUninitialize, CLSCTX_ALL, COINIT_MULTITHREADED,
-};
-use windows::Win32::System::Threading::{CreateEventW, WaitForSingleObject, INFINITE};
-
-use crate::audio_ring::AudioRing;
-
-/// 20 ms at 48 kHz, mono. Matches the rest of the audio pipeline.
-pub const FRAME_SAMPLES: usize = 960;
-
-/// Microphone capture via WASAPI with Windows's communications AEC enabled.
-///
-/// The WASAPI capture stream runs on a dedicated OS thread. This handle is
-/// `Send + Sync`. Dropping it stops the stream and joins the thread.
-pub struct WasapiAudioCapture {
-    ring: Arc<AudioRing>,
-    running: Arc<AtomicBool>,
-    thread: Option<std::thread::JoinHandle<()>>,
-}
-
-impl WasapiAudioCapture {
-    /// Open the default communications microphone, enable OS AEC, and start
-    /// streaming PCM into a lock-free ring buffer.
-    ///
-    /// Returns only after the capture thread has successfully initialized
-    /// the stream, or propagates the error back to the caller.
-    pub fn start() -> Result<Self, anyhow::Error> {
-        let ring = Arc::new(AudioRing::new());
-        let running = Arc::new(AtomicBool::new(true));
-
-        let (init_tx, init_rx) = std::sync::mpsc::sync_channel::<Result<(), String>>(1);
-        let ring_cb = ring.clone();
-        let running_cb = running.clone();
-
-        let thread = std::thread::Builder::new()
-            .name("wzp-audio-capture-wasapi".into())
-            .spawn(move || {
-                let result = unsafe { capture_thread_main(ring_cb, running_cb.clone(), &init_tx) };
-                if let Err(e) = result {
-                    warn!("wasapi capture thread exited with error: {e}");
-                    // If we failed before signaling init, signal now so the
-                    // caller unblocks. Double-send is harmless (channel is
-                    // bounded to 1 and we only hit the second send path on
-                    // late errors).
-                    let _ = init_tx.send(Err(e.to_string()));
-                }
-            })
-            .context("failed to spawn WASAPI capture thread")?;
-
-        init_rx
-            .recv()
-            .map_err(|_| anyhow!("WASAPI capture thread exited before signaling init"))?
-            .map_err(|e| anyhow!("{e}"))?;
-
-        Ok(Self {
-            ring,
-            running,
-            thread: Some(thread),
-        })
-    }
-
-    /// Get a reference to the capture ring buffer for direct polling.
-    pub fn ring(&self) -> &Arc<AudioRing> {
-        &self.ring
-    }
-
-    /// Stop capturing.
-    pub fn stop(&self) {
-        self.running.store(false, Ordering::Relaxed);
-    }
-}
-
-impl Drop for WasapiAudioCapture {
-    fn drop(&mut self) {
-        self.stop();
-        if let Some(handle) = self.thread.take() {
-            // Join best-effort. The thread loop polls `running` every 200ms
-            // via a short WaitForSingleObject timeout, so it should exit
-            // within ~200ms of `stop()`.
-            let _ = handle.join();
-        }
-    }
-}
-
-// ---------------------------------------------------------------------------
-// WASAPI thread entry point — everything below this line runs on the
-// dedicated wzp-audio-capture-wasapi thread.
-// ---------------------------------------------------------------------------
-
-unsafe fn capture_thread_main(
-    ring: Arc<AudioRing>,
-    running: Arc<AtomicBool>,
-    init_tx: &std::sync::mpsc::SyncSender<Result<(), String>>,
-) -> Result<(), anyhow::Error> {
-    // COM init for the capture thread. MULTITHREADED because we're not
-    // running a message pump. Must be balanced by CoUninitialize on exit.
-    CoInitializeEx(None, COINIT_MULTITHREADED)
-        .ok()
-        .context("CoInitializeEx failed")?;
-
-    // Use a guard struct so CoUninitialize runs even on early returns.
-    struct ComGuard;
-    impl Drop for ComGuard {
-        fn drop(&mut self) {
-            unsafe { CoUninitialize() };
-        }
-    }
-    let _com_guard = ComGuard;
-
-    let enumerator: IMMDeviceEnumerator =
-        CoCreateInstance(&MMDeviceEnumerator, None, CLSCTX_ALL)
-            .context("CoCreateInstance(MMDeviceEnumerator) failed")?;
-
-    // eCommunications role (not eConsole) — this picks the device the user
-    // has designated for communications in Sound Settings. It's the one
-    // Windows's AEC is actually tuned for and the one Teams/Zoom use.
-    let device = enumerator
-        .GetDefaultAudioEndpoint(eCapture, eCommunications)
-        .context("GetDefaultAudioEndpoint(eCapture, eCommunications) failed")?;
-
-    if let Ok(name) = device_name(&device) {
-        info!(device = %name, "opening WASAPI communications capture endpoint");
-    }
-
-    let audio_client: IAudioClient = device
-        .Activate(CLSCTX_ALL, None)
-        .context("IMMDevice::Activate(IAudioClient) failed")?;
-
-    // IAudioClient2 exposes SetClientProperties, which is the ONLY way to
-    // set AudioCategory_Communications pre-Initialize. Calling it on the
-    // base IAudioClient would not compile, and setting it after Initialize
-    // is a no-op.
-    let audio_client2: IAudioClient2 = audio_client
-        .cast()
-        .context("QueryInterface IAudioClient2 failed")?;
-
-    let mut props = AudioClientProperties {
-        cbSize: std::mem::size_of::<AudioClientProperties>() as u32,
-        bIsOffload: BOOL(0),
-        eCategory: AudioCategory_Communications,
-        // 0 = AUDCLNT_STREAMOPTIONS_NONE. The `windows` crate doesn't
-        // export the enum constant in all versions, so use 0 directly.
-        Options: Default::default(),
-    };
-    audio_client2
-        .SetClientProperties(&mut props as *mut _)
-        .context("SetClientProperties(AudioCategory_Communications) failed")?;
-
-    // Request 48 kHz mono i16 directly. AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM
-    // tells Windows to do any needed format conversion inside the audio
-    // engine rather than rejecting our format. SRC_DEFAULT_QUALITY picks
-    // the standard Windows resampler quality (fine for voice).
-    let wave_format = WAVEFORMATEX {
-        wFormatTag: WAVE_FORMAT_PCM as u16,
-        nChannels: 1,
-        nSamplesPerSec: 48_000,
-        nAvgBytesPerSec: 48_000 * 2, // 1 ch * 2 bytes/sample * 48000 Hz
-        nBlockAlign: 2,              // 1 ch * 2 bytes/sample
-        wBitsPerSample: 16,
-        cbSize: 0,
-    };
-
-    // 1,000,000 hns = 100 ms buffer (hns = 100-nanosecond units). Windows
-    // treats this as the minimum; the engine may give us a larger one.
-    const BUFFER_DURATION_HNS: i64 = 1_000_000;
-
-    audio_client
-        .Initialize(
-            AUDCLNT_SHAREMODE_SHARED,
-            AUDCLNT_STREAMFLAGS_EVENTCALLBACK
-                | AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM
-                | AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY,
-            BUFFER_DURATION_HNS,
-            0,
-            &wave_format,
-            Some(&GUID::zeroed()),
-        )
-        .context("IAudioClient::Initialize failed — Windows rejected communications-mode 48k mono i16")?;
-
-    // Event-driven capture: Windows signals this handle each time a new
-    // audio packet is available. We wait on it from the loop below.
-    let event = CreateEventW(None, false, false, None)
-        .context("CreateEventW failed")?;
-    audio_client
-        .SetEventHandle(event)
-        .context("SetEventHandle failed")?;
-
-    let capture_client: IAudioCaptureClient = audio_client
-        .GetService()
-        .context("IAudioClient::GetService(IAudioCaptureClient) failed")?;
-
-    audio_client.Start().context("IAudioClient::Start failed")?;
-
-    // Signal to the parent thread that init succeeded before entering the
-    // hot loop. From this point on, errors get logged but don't propagate
-    // back to the caller (they'd just cause the ring buffer to stop
-    // filling, which the main thread detects as underruns).
-    let _ = init_tx.send(Ok(()));
-    info!("WASAPI communications-mode capture started with OS AEC enabled");
-
-    let mut logged_first_packet = false;
-
-    // Main capture loop. Exit when `running` goes false (from Drop or an
-    // explicit stop() call).
-    while running.load(Ordering::Relaxed) {
-        // 200 ms timeout so we check `running` regularly even if the audio
-        // engine stops delivering packets (e.g. device unplugged).
-        let wait = WaitForSingleObject(event, 200);
-        if wait.0 != WAIT_OBJECT_0.0 {
-            // Timeout or failure — just loop and re-check running.
-            continue;
-        }
-
-        // Drain all available packets. Windows may have queued more than
-        // one since we were last scheduled.
-        loop {
-            let packet_length = match capture_client.GetNextPacketSize() {
-                Ok(n) => n,
-                Err(e) => {
-                    warn!("GetNextPacketSize failed: {e}");
-                    break;
-                }
-            };
-            if packet_length == 0 {
-                break;
-            }
-
-            let mut buffer_ptr: *mut u8 = std::ptr::null_mut();
-            let mut num_frames: u32 = 0;
-            let mut flags: u32 = 0;
-            let mut device_position: u64 = 0;
-            let mut qpc_position: u64 = 0;
-
-            if let Err(e) = capture_client.GetBuffer(
-                &mut buffer_ptr,
-                &mut num_frames,
-                &mut flags,
-                Some(&mut device_position),
-                Some(&mut qpc_position),
-            ) {
-                warn!("GetBuffer failed: {e}");
-                break;
-            }
-
-            if num_frames > 0 && !buffer_ptr.is_null() {
-                if !logged_first_packet {
-                    info!(
-                        frames = num_frames,
-                        flags, "WASAPI capture: first packet received"
-                    );
-                    logged_first_packet = true;
-                }
-
-                // Because we asked for 48 kHz mono i16, each frame is
-                // exactly one i16. Windows's AUTOCONVERTPCM handles the
-                // conversion from whatever the engine mix format is.
-                let samples = std::slice::from_raw_parts(
-                    buffer_ptr as *const i16,
-                    num_frames as usize,
-                );
-                ring.write(samples);
-            }
-
-            if let Err(e) = capture_client.ReleaseBuffer(num_frames) {
-                warn!("ReleaseBuffer failed: {e}");
-                break;
-            }
-        }
-    }
-
-    info!("WASAPI capture thread stopping");
-    let _ = audio_client.Stop();
-    let _ = CloseHandle(event);
-    // _com_guard drops here, calling CoUninitialize.
-
-    // Silence INFINITE unused-import warning — it's referenced by the
-    // `windows` crate's WaitForSingleObject alternative but we use the
-    // 200 ms timeout variant instead. Explicit suppression for clarity.
-    let _ = INFINITE;
-
-    Ok(())
-}
-
-// ---------------------------------------------------------------------------
-// Helpers
-// ---------------------------------------------------------------------------
-
-/// Best-effort device ID string for logging. Grabbing the friendly name via
-/// PKEY_Device_FriendlyName requires IPropertyStore + PROPVARIANT plumbing
-/// that's far more ceremony than a log line justifies; the ID is already
-/// sufficient to confirm we opened the right endpoint.
-///
-/// Rust 2024 edition's `unsafe_op_in_unsafe_fn` lint requires explicit
-/// `unsafe { ... }` blocks inside `unsafe fn` bodies for each unsafe call,
-/// even though the whole function is already marked unsafe.
-unsafe fn device_name(
-    device: &windows::Win32::Media::Audio::IMMDevice,
-) -> Result<String, anyhow::Error> {
-    let id = unsafe { device.GetId() }.context("IMMDevice::GetId failed")?;
-    Ok(unsafe { id.to_string() }.unwrap_or_else(|_| "<non-utf16>".to_string()))
-}

crates/wzp-client/src/call.rs

@@ -7,15 +7,14 @@ use std::time::{Duration, Instant};
 use bytes::Bytes;
 use tracing::{debug, info, warn};
 
-use wzp_codec::dred_ffi::{DredDecoderHandle, DredState};
+use wzp_codec::{AutoGainControl, ComfortNoise, EchoCanceller, NoiseSupressor, SilenceDetector};
-use wzp_codec::{
-    AdaptiveDecoder, AutoGainControl, ComfortNoise, EchoCanceller, NoiseSupressor, SilenceDetector,
-};
 use wzp_fec::{RaptorQFecDecoder, RaptorQFecEncoder};
 use wzp_proto::jitter::{JitterBuffer, PlayoutResult};
 use wzp_proto::packet::{MediaHeader, MediaPacket, MiniFrameContext};
 use wzp_proto::quality::AdaptiveQualityController;
-use wzp_proto::traits::{AudioDecoder, AudioEncoder, FecDecoder, FecEncoder};
+use wzp_proto::traits::{
+    AudioDecoder, AudioEncoder, FecDecoder, FecEncoder,
+};
 use wzp_proto::packet::QualityReport;
 use wzp_proto::{CodecId, QualityProfile};
 
@@ -43,9 +42,6 @@ pub struct CallConfig {
     /// When enabled, only every 50th frame carries a full 12-byte MediaHeader;
     /// intermediate frames use a compact 4-byte MiniHeader.
     pub mini_frames_enabled: bool,
-    /// AEC far-end delay compensation in milliseconds (default: 40).
-    /// Compensates for the round-trip audio latency from playout to mic capture.
-    pub aec_delay_ms: u32,
     /// Enable adaptive jitter buffer (default: true).
     ///
     /// When true, the jitter buffer target depth is automatically adjusted
@@ -67,7 +63,6 @@ impl Default for CallConfig {
             noise_suppression: true,
             mini_frames_enabled: true,
             adaptive_jitter: true,
-            aec_delay_ms: 40,
         }
     }
 }
@@ -246,7 +241,7 @@ impl CallEncoder {
             block_id: 0,
             frame_in_block: 0,
             timestamp_ms: 0,
-            aec: EchoCanceller::with_delay(48000, 60, config.aec_delay_ms),
+            aec: EchoCanceller::new(48000, 100), // 100 ms echo tail
             agc: AutoGainControl::new(),
             silence_detector: SilenceDetector::new(
                 config.silence_threshold_rms,
@@ -345,22 +340,6 @@ impl CallEncoder {
         let enc_len = self.audio_enc.encode(pcm, &mut encoded)?;
         encoded.truncate(enc_len);
 
-        // Phase 2: Opus tiers bypass RaptorQ entirely (DRED handles loss
-        // recovery at the codec layer). Codec2 tiers keep RaptorQ unchanged.
-        // On Opus packets, zero the FEC header fields so old receivers
-        // can cleanly identify "no RaptorQ block to assemble" and new
-        // receivers can short-circuit their FEC ingest path.
-        let is_opus = self.profile.codec.is_opus();
-        let (fec_block, fec_symbol, fec_ratio_encoded) = if is_opus {
-            (0u8, 0u8, 0u8)
-        } else {
-            (
-                self.block_id,
-                self.frame_in_block,
-                MediaHeader::encode_fec_ratio(self.profile.fec_ratio),
-            )
-        };
-
         // Build source media packet
         let source_pkt = MediaPacket {
             header: MediaHeader {
@@ -368,11 +347,11 @@ impl CallEncoder {
                 is_repair: false,
                 codec_id: self.profile.codec,
                 has_quality_report: false,
-                fec_ratio_encoded,
+                fec_ratio_encoded: MediaHeader::encode_fec_ratio(self.profile.fec_ratio),
                 seq: self.seq,
                 timestamp: self.timestamp_ms,
-                fec_block,
+                fec_block: self.block_id,
-                fec_symbol,
+                fec_symbol: self.frame_in_block,
                 reserved: 0,
                 csrc_count: 0,
             },
@@ -387,13 +366,11 @@ impl CallEncoder {
 
         let mut output = vec![source_pkt];
 
-        // Codec2-only: feed RaptorQ and generate repair packets when the
+        // Add to FEC encoder
-        // block is full. Opus tiers skip this entire block — DRED (active
-        // in Phase 1) provides codec-layer loss recovery.
-        if !is_opus {
         self.fec_enc.add_source_symbol(&encoded)?;
         self.frame_in_block += 1;
 
+        // If block is full, generate repair and finalize
         if self.frame_in_block >= self.profile.frames_per_block {
             if let Ok(repairs) = self.fec_enc.generate_repair(self.profile.fec_ratio) {
                 for (sym_idx, repair_data) in repairs {
@@ -423,7 +400,6 @@ impl CallEncoder {
             self.block_id = self.block_id.wrapping_add(1);
             self.frame_in_block = 0;
         }
-        }
 
         Ok(output)
     }
@@ -458,12 +434,9 @@ impl CallEncoder {
 
 /// Manages the recv/decode side of a call.
 pub struct CallDecoder {
-    /// Audio decoder. Concrete `AdaptiveDecoder` (not `Box<dyn AudioDecoder>`)
+    /// Audio decoder.
-    /// because Phase 3b calls the inherent `reconstruct_from_dred` method,
+    audio_dec: Box<dyn AudioDecoder>,
-    /// which cannot live on the `AudioDecoder` trait without dragging libopus
+    /// FEC decoder.
-    /// types into `wzp-proto`.
-    audio_dec: AdaptiveDecoder,
-    /// FEC decoder (Codec2 tiers only; Opus bypasses RaptorQ per Phase 2).
     fec_dec: RaptorQFecDecoder,
     /// Jitter buffer.
     jitter: JitterBuffer,
@@ -477,24 +450,6 @@ pub struct CallDecoder {
     last_was_cn: bool,
     /// Mini-frame decompression context (tracks last full header baseline).
     mini_context: MiniFrameContext,
-    // ─── Phase 3b: DRED reconstruction state ──────────────────────────────
-    /// DRED side-channel parser (a separate libopus object from the decoder).
-    dred_decoder: DredDecoderHandle,
-    /// Scratch buffer used by `dred_decoder.parse_into` on every arriving
-    /// Opus packet. Reused across calls to avoid 10 KB alloc churn per packet.
-    dred_parse_scratch: DredState,
-    /// Cached "most recently parsed valid" DRED state, swapped with
-    /// `dred_parse_scratch` on successful parse. Used by `decode_next` when
-    /// the jitter buffer reports a gap.
-    last_good_dred: DredState,
-    /// Sequence number of the packet that produced `last_good_dred`. `None`
-    /// if no packet has yielded DRED state yet (cold start or legacy sender).
-    last_good_dred_seq: Option<u16>,
-    /// Phase 4 telemetry counter: gaps recovered via DRED reconstruction.
-    pub dred_reconstructions: u64,
-    /// Phase 4 telemetry counter: gaps filled via classical Opus PLC
-    /// (because no DRED state covered the gap, or the active codec is Codec2).
-    pub classical_plc_invocations: u64,
 }
 
 impl CallDecoder {
@@ -504,19 +459,8 @@ impl CallDecoder {
         } else {
             JitterBuffer::new(config.jitter_target, config.jitter_max, config.jitter_min)
         };
-        // Phase 3b: build the DRED parser + state buffers. These allocate
-        // libopus state (~10 KB each) once per call, not per packet — the
-        // scratch and last-good buffers are reused via std::mem::swap on
-        // every successful parse.
-        let dred_decoder =
-            DredDecoderHandle::new().expect("opus_dred_decoder_create failed at call setup");
-        let dred_parse_scratch =
-            DredState::new().expect("opus_dred_alloc failed at call setup (scratch)");
-        let last_good_dred =
-            DredState::new().expect("opus_dred_alloc failed at call setup (good state)");
         Self {
-            audio_dec: AdaptiveDecoder::new(config.profile)
+            audio_dec: wzp_codec::create_decoder(config.profile),
-                .expect("failed to create adaptive decoder"),
             fec_dec: wzp_fec::create_decoder(&config.profile),
             jitter,
             quality: AdaptiveQualityController::new(),
@@ -524,12 +468,6 @@ impl CallDecoder {
             comfort_noise: ComfortNoise::new(50),
             last_was_cn: false,
             mini_context: MiniFrameContext::default(),
-            dred_decoder,
-            dred_parse_scratch,
-            last_good_dred,
-            last_good_dred_seq: None,
-            dred_reconstructions: 0,
-            classical_plc_invocations: 0,
         }
     }
 
@@ -544,105 +482,20 @@ impl CallDecoder {
 
     /// Feed a received media packet into the decode pipeline.
     pub fn ingest(&mut self, packet: MediaPacket) {
-        // Phase 2: Opus packets bypass RaptorQ. Codec2 packets still feed
+        // Feed to FEC decoder
-        // the FEC decoder for recovery. This also cleanly drops any stray
-        // Opus repair packets from an old sender (we don't push repair
-        // packets to the jitter buffer either, so they're effectively
-        // ignored — a graceful mixed-version degradation).
-        if !packet.header.codec_id.is_opus() {
         let _ = self.fec_dec.add_symbol(
             packet.header.fec_block,
             packet.header.fec_symbol,
             packet.header.is_repair,
             &packet.payload,
         );
-        }
 
-        // Phase 3b: Opus source packets carry DRED side-channel data in
+        // If not a repair packet, also feed directly to jitter buffer
-        // libopus 1.5. Parse it into the scratch state and, on success,
-        // swap with the cached `last_good_dred` so later gap reconstruction
-        // has fresh neural redundancy to draw from. Parsing happens before
-        // the jitter push because the jitter buffer consumes the packet.
-        if packet.header.codec_id.is_opus() && !packet.header.is_repair {
-            match self
-                .dred_decoder
-                .parse_into(&mut self.dred_parse_scratch, &packet.payload)
-            {
-                Ok(available) if available > 0 => {
-                    // Swap the freshly parsed state into `last_good_dred`.
-                    // The old good state (now in scratch) is about to be
-                    // overwritten on the next parse — its contents are
-                    // not needed after this swap.
-                    std::mem::swap(&mut self.dred_parse_scratch, &mut self.last_good_dred);
-                    self.last_good_dred_seq = Some(packet.header.seq);
-                }
-                Ok(_) => {
-                    // Packet had no DRED data (return 0). Leave the cached
-                    // state untouched — it may still cover upcoming gaps
-                    // from a warm-up period where the encoder was producing
-                    // DRED bytes. The scratch buffer was potentially written
-                    // but its `samples_available` is 0 so it's harmless.
-                }
-                Err(e) => {
-                    debug!("DRED parse error (ignored): {e}");
-                }
-            }
-        }
-
-        // Source packets (Opus or Codec2) go to the jitter buffer for decode.
-        // Repair packets never reach the jitter buffer; for Codec2 they're
-        // used by the FEC decoder above, for Opus they're dropped here.
         if !packet.header.is_repair {
             self.jitter.push(packet);
         }
     }
 
-    /// Switch the decoder to match an incoming packet's codec if it differs
-    /// from the current profile. This enables cross-codec interop (e.g. one
-    /// client sends Opus, the other sends Codec2).
-    fn switch_decoder_if_needed(&mut self, incoming_codec: CodecId) {
-        if incoming_codec == self.profile.codec || incoming_codec == CodecId::ComfortNoise {
-            return;
-        }
-        let new_profile = Self::profile_for_codec(incoming_codec);
-        info!(
-            from = ?self.profile.codec,
-            to = ?incoming_codec,
-            "decoder switching codec to match incoming packet"
-        );
-        if let Err(e) = self.audio_dec.set_profile(new_profile) {
-            warn!("failed to switch decoder profile: {e}");
-            return;
-        }
-        self.fec_dec = wzp_fec::create_decoder(&new_profile);
-        self.profile = new_profile;
-    }
-
-    /// Map a `CodecId` to a reasonable `QualityProfile` for decoding.
-    fn profile_for_codec(codec: CodecId) -> QualityProfile {
-        match codec {
-            CodecId::Opus24k => QualityProfile::GOOD,
-            CodecId::Opus16k => QualityProfile {
-                codec: CodecId::Opus16k,
-                fec_ratio: 0.3,
-                frame_duration_ms: 20,
-                frames_per_block: 5,
-            },
-            CodecId::Opus6k => QualityProfile::DEGRADED,
-            CodecId::Opus32k => QualityProfile::STUDIO_32K,
-            CodecId::Opus48k => QualityProfile::STUDIO_48K,
-            CodecId::Opus64k => QualityProfile::STUDIO_64K,
-            CodecId::Codec2_3200 => QualityProfile {
-                codec: CodecId::Codec2_3200,
-                fec_ratio: 0.5,
-                frame_duration_ms: 20,
-                frames_per_block: 5,
-            },
-            CodecId::Codec2_1200 => QualityProfile::CATASTROPHIC,
-            CodecId::ComfortNoise => QualityProfile::GOOD,
-        }
-    }
-
     /// Decode the next audio frame from the jitter buffer.
     ///
     /// Returns PCM samples (48kHz mono) or None if not ready.
@@ -657,9 +510,6 @@ impl CallDecoder {
                     return Some(pcm.len());
                 }
 
-                // Auto-switch decoder if incoming codec differs from current.
-                self.switch_decoder_if_needed(pkt.header.codec_id);
-
                 self.last_was_cn = false;
                 let result = match self.audio_dec.decode(&pkt.payload, pcm) {
                     Ok(n) => Some(n),
@@ -674,72 +524,19 @@ impl CallDecoder {
                 result
             }
             PlayoutResult::Missing { seq } => {
-                // Only attempt recovery if there are still packets buffered ahead.
+                // Only generate PLC if there are still packets buffered ahead.
                 // Otherwise we've drained everything — return None to stop.
-                if self.jitter.depth() == 0 {
+                if self.jitter.depth() > 0 {
-                    self.jitter.record_underrun();
+                    debug!(seq, "packet loss, generating PLC");
-                    return None;
-                }
-
-                // Phase 3b: try DRED reconstruction first. If we have a
-                // recent DRED state from a packet whose seq > missing seq,
-                // and the seq delta (in samples) fits within the state's
-                // available window, libopus can synthesize a plausible
-                // replacement for the lost frame. Fall back to classical
-                // PLC when no state covers the gap, when the active codec
-                // is Codec2, or when the reconstruction itself errors.
-                if self.profile.codec.is_opus() {
-                    if let Some(last_seq) = self.last_good_dred_seq {
-                        // How many frames ahead of the missing seq is the
-                        // last-good packet? Use wrapping arithmetic for the
-                        // u16 seq space.
-                        let seq_delta = last_seq.wrapping_sub(seq);
-                        // Reject stale or backward state. u16 wraparound
-                        // would make a "seq went backward" delta very large;
-                        // cap at a sane forward-looking window.
-                        const MAX_SEQ_DELTA: u16 = 128;
-                        if seq_delta > 0 && seq_delta <= MAX_SEQ_DELTA {
-                            let frame_samples =
-                                (48_000 * self.profile.frame_duration_ms as i32) / 1000;
-                            let offset_samples = seq_delta as i32 * frame_samples;
-                            let available = self.last_good_dred.samples_available();
-                            if offset_samples > 0 && offset_samples <= available {
-                                match self.audio_dec.reconstruct_from_dred(
-                                    &self.last_good_dred,
-                                    offset_samples,
-                                    pcm,
-                                ) {
-                                    Ok(n) => {
-                                        self.dred_reconstructions += 1;
-                                        self.jitter.record_decode();
-                                        debug!(
-                                            seq,
-                                            last_seq,
-                                            offset_samples,
-                                            available,
-                                            "DRED reconstruction for gap"
-                                        );
-                                        return Some(n);
-                                    }
-                                    Err(e) => {
-                                        // Reconstruction failed — fall
-                                        // through to classical PLC below.
-                                        debug!(seq, "DRED reconstruct error: {e}");
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-
-                // Classical PLC fallback (also the Codec2 path).
-                debug!(seq, "packet loss, generating classical PLC");
-                self.classical_plc_invocations += 1;
                     let result = self.audio_dec.decode_lost(pcm).ok();
                     if result.is_some() {
                         self.jitter.record_decode();
                     }
                     result
+                } else {
+                    self.jitter.record_underrun();
+                    None
+                }
             }
             PlayoutResult::NotReady => {
                 self.jitter.record_underrun();
@@ -762,19 +559,6 @@ impl CallDecoder {
     pub fn reset_stats(&mut self) {
         self.jitter.reset_stats();
     }
-
-    /// Phase 3b introspection: sequence number of the most recently parsed
-    /// valid DRED state, or `None` if no Opus packet has yielded DRED data
-    /// yet. Used by tests to debug reconstruction eligibility.
-    pub fn last_good_dred_seq(&self) -> Option<u16> {
-        self.last_good_dred_seq
-    }
-
-    /// Phase 3b introspection: samples of audio history currently available
-    /// in the cached DRED state.
-    pub fn last_good_dred_samples_available(&self) -> i32 {
-        self.last_good_dred.samples_available()
-    }
 }
 
 /// Periodic telemetry logger for jitter buffer statistics.
@@ -836,83 +620,18 @@ mod tests {
         assert!(!packets[0].header.is_repair);
     }
 
-    /// Phase 2: Opus packets have zero FEC header fields — no block, no
-    /// symbol index, no repair ratio. The RaptorQ layer is bypassed
-    /// entirely on the Opus tiers.
     #[test]
-    fn opus_source_packets_have_zero_fec_header_fields() {
+    fn encoder_generates_repair_on_full_block() {
         let config = CallConfig {
-            profile: QualityProfile::GOOD, // Opus 24k
+            profile: QualityProfile::GOOD, // 5 frames/block
-            suppression_enabled: false,    // skip silence gate for this test
             ..Default::default()
         };
         let mut enc = CallEncoder::new(&config);
-        // Non-silent sine wave so silence detection doesn't suppress us
+        let pcm = vec![0i16; 960];
-        // even with suppression_enabled=false (belt and braces).
-        let pcm: Vec<i16> = (0..960)
-            .map(|i| ((i as f32 * 0.1).sin() * 10_000.0) as i16)
-            .collect();
-        let packets = enc.encode_frame(&pcm).unwrap();
-        assert_eq!(packets.len(), 1, "Opus must emit exactly 1 source packet");
-        let hdr = &packets[0].header;
-        assert!(hdr.codec_id.is_opus());
-        assert!(!hdr.is_repair);
-        assert_eq!(hdr.fec_block, 0, "Opus fec_block must be 0");
-        assert_eq!(hdr.fec_symbol, 0, "Opus fec_symbol must be 0");
-        assert_eq!(hdr.fec_ratio_encoded, 0, "Opus fec_ratio_encoded must be 0");
-    }
 
-    /// Phase 2: Opus never emits repair packets, regardless of how many
+        let mut total_packets = 0;
-    /// source frames are fed in. DRED (Phase 1) provides loss recovery at
+        let mut repair_count = 0;
-    /// the codec layer; RaptorQ is disabled on Opus tiers.
+        for _ in 0..5 {
-    #[test]
-    fn opus_encoder_never_emits_repair_packets() {
-        let config = CallConfig {
-            profile: QualityProfile::GOOD, // 5 frames/block in the Codec2 sense
-            suppression_enabled: false,
-            ..Default::default()
-        };
-        let mut enc = CallEncoder::new(&config);
-        let pcm: Vec<i16> = (0..960)
-            .map(|i| ((i as f32 * 0.1).sin() * 10_000.0) as i16)
-            .collect();
-
-        // Encode well beyond a block boundary to prove no repair ever comes out.
-        let mut total_packets = 0usize;
-        let mut repair_count = 0usize;
-        for _ in 0..20 {
-            let packets = enc.encode_frame(&pcm).unwrap();
-            total_packets += packets.len();
-            repair_count += packets.iter().filter(|p| p.header.is_repair).count();
-        }
-        assert_eq!(repair_count, 0, "Opus must emit zero repair packets");
-        assert_eq!(
-            total_packets, 20,
-            "20 source frames → 20 source packets (1:1, no RaptorQ expansion)"
-        );
-    }
-
-    /// Phase 2: Codec2 still emits repair packets with RaptorQ ratio unchanged.
-    /// DRED is libopus-only and does not apply here, so RaptorQ is still the
-    /// primary loss-recovery mechanism on Codec2 tiers.
-    #[test]
-    fn codec2_encoder_generates_repair_on_full_block() {
-        let config = CallConfig {
-            profile: QualityProfile::CATASTROPHIC, // Codec2 1200, 8 frames/block, ratio 1.0
-            suppression_enabled: false,
-            ..Default::default()
-        };
-        let mut enc = CallEncoder::new(&config);
-        // Codec2 takes 48 kHz samples and downsamples internally.
-        // CATASTROPHIC uses 40 ms frames → 1920 samples.
-        let pcm: Vec<i16> = (0..1920)
-            .map(|i| ((i as f32 * 0.1).sin() * 10_000.0) as i16)
-            .collect();
-
-        let mut total_packets = 0usize;
-        let mut repair_count = 0usize;
-        // Run long enough to cross the 8-frame block boundary and see repairs.
-        for _ in 0..16 {
             let packets = enc.encode_frame(&pcm).unwrap();
             for p in &packets {
                 if p.header.is_repair {
@@ -921,10 +640,8 @@ mod tests {
             }
             total_packets += packets.len();
         }
-        assert!(
+        assert!(repair_count > 0, "should have repair packets after full block");
-            repair_count > 0,
+        assert!(total_packets > 5, "total {total_packets} should exceed 5 source");
-            "Codec2 must still emit repair packets (got {repair_count} repairs, {total_packets} total)"
-        );
     }
 
     #[test]
@@ -955,219 +672,6 @@ mod tests {
         assert!(dec.decode_next(&mut pcm).is_none());
     }
 
-    // ─── Phase 3b — DRED reconstruction on packet loss ────────────────────
-
-    /// Helper: create a CallEncoder/CallDecoder pair with the given profile
-    /// and silence suppression disabled so silence-detection doesn't drop
-    /// our synthetic test frames.
-    fn encoder_decoder_pair(profile: QualityProfile) -> (CallEncoder, CallDecoder) {
-        let config = CallConfig {
-            profile,
-            suppression_enabled: false,
-            // Small jitter buffer so decode_next drains quickly in tests.
-            jitter_min: 2,
-            jitter_target: 3,
-            jitter_max: 20,
-            adaptive_jitter: false,
-            ..Default::default()
-        };
-        (CallEncoder::new(&config), CallDecoder::new(&config))
-    }
-
-    /// Helper: generate a non-silent 20 ms frame of 300 Hz sine at the
-    /// given sample offset so consecutive frames form a continuous tone.
-    fn voice_frame_20ms(sample_offset: usize) -> Vec<i16> {
-        (0..960)
-            .map(|i| {
-                let t = (sample_offset + i) as f64 / 48_000.0;
-                (8000.0 * (2.0 * std::f64::consts::PI * 300.0 * t).sin()) as i16
-            })
-            .collect()
-    }
-
-    /// Phase 3b probe: sweep packet_loss_perc values to find the minimum
-    /// that produces a samples_available ≥ 960 (enough to reconstruct a
-    /// single 20 ms Opus frame). This guides the production loss floor.
-    #[test]
-    #[ignore] // diagnostic only — run with `cargo test ... -- --ignored --nocapture`
-    fn probe_dred_samples_available_by_loss_floor() {
-        use wzp_codec::opus_enc::OpusEncoder;
-        use wzp_proto::traits::AudioEncoder;
-
-        for loss_pct in [5u8, 10, 15, 20, 25, 40, 60, 80].iter().copied() {
-            let mut enc = OpusEncoder::new(QualityProfile::GOOD).unwrap();
-            enc.set_expected_loss(loss_pct);
-            let (_drop_enc, mut dec) = encoder_decoder_pair(QualityProfile::GOOD);
-
-            for i in 0..60u16 {
-                let pcm = voice_frame_20ms(i as usize * 960);
-                let mut encoded = vec![0u8; 512];
-                let n = enc.encode(&pcm, &mut encoded).unwrap();
-                encoded.truncate(n);
-                let pkt = MediaPacket {
-                    header: MediaHeader {
-                        version: 0,
-                        is_repair: false,
-                        codec_id: CodecId::Opus24k,
-                        has_quality_report: false,
-                        fec_ratio_encoded: 0,
-                        seq: i,
-                        timestamp: (i as u32) * 20,
-                        fec_block: 0,
-                        fec_symbol: 0,
-                        reserved: 0,
-                        csrc_count: 0,
-                    },
-                    payload: Bytes::from(encoded),
-                    quality_report: None,
-                };
-                dec.ingest(pkt);
-            }
-            eprintln!(
-                "[phase3b probe] loss_pct={loss_pct} samples_available={}",
-                dec.last_good_dred_samples_available()
-            );
-        }
-    }
-
-    /// Phase 3b: simulated single-packet loss on an Opus call triggers a
-    /// DRED reconstruction rather than a classical PLC fill. Runs the full
-    /// encode → ingest → decode_next pipeline.
-    #[test]
-    fn opus_single_packet_loss_is_recovered_via_dred() {
-        let (mut enc, mut dec) = encoder_decoder_pair(QualityProfile::GOOD);
-
-        // Warm-up: encode and ingest 60 frames (1.2 s) so the DRED emitter
-        // has had time to fill its 200 ms window and at least one
-        // successful DRED parse has happened on the decoder side.
-        let warmup_frames = 60;
-        for i in 0..warmup_frames {
-            let pcm = voice_frame_20ms(i * 960);
-            let packets = enc.encode_frame(&pcm).unwrap();
-            for pkt in packets {
-                dec.ingest(pkt);
-            }
-        }
-
-        // Drain the warm-up frames through the decoder to advance the
-        // jitter buffer cursor past them.
-        let mut out = vec![0i16; 960];
-        while dec.decode_next(&mut out).is_some() {}
-
-        // Encode the next three frames but skip ingesting the middle one.
-        let base_offset = warmup_frames * 960;
-        let pcm_a = voice_frame_20ms(base_offset);
-        let pcm_b = voice_frame_20ms(base_offset + 960);
-        let pcm_c = voice_frame_20ms(base_offset + 1920);
-
-        let pkts_a = enc.encode_frame(&pcm_a).unwrap();
-        let pkts_b = enc.encode_frame(&pcm_b).unwrap(); // DROP THIS ONE
-        let pkts_c = enc.encode_frame(&pcm_c).unwrap();
-
-        for pkt in pkts_a {
-            dec.ingest(pkt);
-        }
-        // Skip pkts_b entirely — this is the "packet loss".
-        drop(pkts_b);
-        for pkt in pkts_c {
-            dec.ingest(pkt);
-        }
-
-        // Drain again. Somewhere in here decode_next will hit Missing()
-        // for the dropped packet and attempt DRED reconstruction.
-        let baseline_dred = dec.dred_reconstructions;
-        let baseline_plc = dec.classical_plc_invocations;
-        eprintln!(
-            "[phase3b probe] pre-drain: last_good_seq={:?} samples_available={}",
-            dec.last_good_dred_seq(),
-            dec.last_good_dred_samples_available()
-        );
-        while dec.decode_next(&mut out).is_some() {}
-
-        let dred_delta = dec.dred_reconstructions - baseline_dred;
-        let plc_delta = dec.classical_plc_invocations - baseline_plc;
-        eprintln!(
-            "[phase3b probe] post-drain: dred_delta={dred_delta} plc_delta={plc_delta}"
-        );
-        assert!(
-            dred_delta >= 1,
-            "expected ≥1 DRED reconstruction on single-packet loss, \
-             got dred_delta={dred_delta} plc_delta={plc_delta}"
-        );
-    }
-
-    /// Phase 3b: lossless stream never triggers DRED reconstruction or PLC.
-    /// Baseline behavior — verifies the Missing() branch is not spuriously taken.
-    #[test]
-    fn opus_lossless_ingest_never_triggers_dred_or_plc() {
-        let (mut enc, mut dec) = encoder_decoder_pair(QualityProfile::GOOD);
-
-        // Encode + ingest 40 frames with no drops.
-        for i in 0..40 {
-            let pcm = voice_frame_20ms(i * 960);
-            let packets = enc.encode_frame(&pcm).unwrap();
-            for pkt in packets {
-                dec.ingest(pkt);
-            }
-        }
-
-        let mut out = vec![0i16; 960];
-        while dec.decode_next(&mut out).is_some() {}
-
-        assert_eq!(
-            dec.dred_reconstructions, 0,
-            "lossless stream should not reconstruct"
-        );
-        assert_eq!(
-            dec.classical_plc_invocations, 0,
-            "lossless stream should not PLC"
-        );
-    }
-
-    /// Phase 3b: Codec2 calls fall through to classical PLC on loss.
-    /// DRED is libopus-only, so even if the decoder's DRED state were
-    /// populated (it won't be — Codec2 packets don't carry DRED bytes),
-    /// `reconstruct_from_dred` rejects Codec2 at the AdaptiveDecoder
-    /// level. This test guards the Codec2 side of the protection split.
-    #[test]
-    fn codec2_loss_falls_through_to_classical_plc() {
-        let (mut enc, mut dec) = encoder_decoder_pair(QualityProfile::CATASTROPHIC);
-
-        // Codec2 1200 uses 40 ms frames → 1920 samples at 48 kHz (before
-        // the downsample inside the codec). Encode 20 frames (~0.8 s).
-        let make_frame = |offset: usize| -> Vec<i16> {
-            (0..1920)
-                .map(|i| {
-                    let t = (offset + i) as f64 / 48_000.0;
-                    (8000.0 * (2.0 * std::f64::consts::PI * 300.0 * t).sin()) as i16
-                })
-                .collect()
-        };
-
-        for i in 0..20 {
-            let pcm = make_frame(i * 1920);
-            let packets = enc.encode_frame(&pcm).unwrap();
-            for pkt in packets {
-                // Drop every 5th source packet to simulate loss.
-                if !pkt.header.is_repair && i % 5 == 3 {
-                    continue;
-                }
-                dec.ingest(pkt);
-            }
-        }
-
-        let mut out = vec![0i16; 1920];
-        while dec.decode_next(&mut out).is_some() {}
-
-        assert_eq!(
-            dec.dred_reconstructions, 0,
-            "Codec2 must never reconstruct via DRED"
-        );
-        // classical_plc_invocations may or may not trigger depending on
-        // whether the jitter buffer sees Missing before draining — the key
-        // assertion is that DRED is not used. PLC count is advisory.
-    }
-
     // ---- QualityAdapter tests ----
 
     /// Helper: build a QualityReport from human-readable loss% and RTT ms.

crates/wzp-client/src/cli.rs

@@ -47,11 +47,6 @@ struct CliArgs {
     room: Option<String>,
     token: Option<String>,
     _metrics_file: Option<String>,
-    version_check: bool,
-    /// Connect to relay for persistent signaling (direct calls).
-    signal: bool,
-    /// Place a direct call to a fingerprint (requires --signal).
-    call_target: Option<String>,
 }
 
 impl CliArgs {
@@ -93,20 +88,12 @@ fn parse_args() -> CliArgs {
     let mut room = None;
     let mut token = None;
     let mut metrics_file = None;
-    let mut version_check = false;
     let mut relay_str = None;
-    let mut signal = false;
-    let mut call_target = None;
 
     let mut i = 1;
     while i < args.len() {
         match args[i].as_str() {
             "--live" => live = true,
-            "--signal" => signal = true,
-            "--call" => {
-                i += 1;
-                call_target = Some(args.get(i).expect("--call requires a fingerprint").to_string());
-            }
             "--send-tone" => {
                 i += 1;
                 send_tone_secs = Some(
@@ -182,7 +169,6 @@ fn parse_args() -> CliArgs {
                 );
             }
             "--sweep" => sweep = true,
-            "--version-check" => { version_check = true; }
             "--help" | "-h" => {
                 eprintln!("Usage: wzp-client [options] [relay-addr]");
                 eprintln!();
@@ -235,9 +221,6 @@ fn parse_args() -> CliArgs {
         room,
         token,
         _metrics_file: metrics_file,
-        version_check,
-        signal,
-        call_target,
     }
 }
 
@@ -256,32 +239,6 @@ async fn main() -> anyhow::Result<()> {
         return Ok(());
     }
 
-    // --version-check: query relay version over QUIC and exit
-    if cli.version_check {
-        let client_config = wzp_transport::client_config();
-        let bind_addr: SocketAddr = "0.0.0.0:0".parse()?;
-        let endpoint = wzp_transport::create_endpoint(bind_addr, None)?;
-        let conn = wzp_transport::connect(&endpoint, cli.relay_addr, "version", client_config).await?;
-        match conn.accept_uni().await {
-            Ok(mut recv) => {
-                let data = recv.read_to_end(256).await.unwrap_or_default();
-                let version = String::from_utf8_lossy(&data);
-                println!("{} {}", cli.relay_addr, version.trim());
-            }
-            Err(e) => {
-                eprintln!("relay {} does not support version query: {e}", cli.relay_addr);
-            }
-        }
-        endpoint.close(0u32.into(), b"done");
-        return Ok(());
-    }
-
-    // --signal mode: persistent signaling for direct calls
-    if cli.signal {
-        let seed = cli.resolve_seed();
-        return run_signal_mode(cli.relay_addr, seed, cli.token, cli.call_target).await;
-    }
-
     let seed = cli.resolve_seed();
 
     info!(
@@ -293,11 +250,12 @@ async fn main() -> anyhow::Result<()> {
         "WarzonePhone client"
     );
 
-    // Use raw room name as SNI (consistent with Android + Desktop clients for federation)
+    // Hash room name for SNI privacy (or "default" if none specified)
     let sni = match &cli.room {
         Some(name) => {
-            info!(room = %name, "using room name as SNI");
+            let hashed = wzp_crypto::hash_room_name(name);
-            name.clone()
+            info!(room = %name, hashed = %hashed, "room name hashed for SNI");
+            hashed
         }
         None => "default".to_string(),
     };
@@ -316,26 +274,6 @@ async fn main() -> anyhow::Result<()> {
 
     let transport = Arc::new(wzp_transport::QuinnTransport::new(connection));
 
-    // Register shutdown handler so SIGTERM/SIGINT always closes QUIC cleanly.
-    // Without this, killed clients leave zombie connections on the relay for ~30s.
-    {
-        let shutdown_transport = transport.clone();
-        tokio::spawn(async move {
-            let mut sigterm = tokio::signal::unix::signal(tokio::signal::unix::SignalKind::terminate())
-                .expect("failed to register SIGTERM handler");
-            let mut sigint = tokio::signal::unix::signal(tokio::signal::unix::SignalKind::interrupt())
-                .expect("failed to register SIGINT handler");
-            tokio::select! {
-                _ = sigterm.recv() => { info!("SIGTERM received, closing connection..."); }
-                _ = sigint.recv() => { info!("SIGINT received, closing connection..."); }
-            }
-            // Close the QUIC connection immediately (APPLICATION_CLOSE frame).
-            // Don't call process::exit — let the main task detect the closed
-            // connection and perform clean shutdown (e.g., save recordings).
-            shutdown_transport.connection().close(0u32.into(), b"shutdown");
-        });
-    }
-
     // Send auth token if provided (relay with --auth-url expects this first)
     if let Some(ref token) = cli.token {
         let auth = wzp_proto::SignalMessage::AuthToken {
@@ -626,21 +564,11 @@ async fn run_live(transport: Arc<wzp_transport::QuinnTransport>) -> anyhow::Resu
         .spawn(move || {
             let config = CallConfig::default();
             let mut encoder = CallEncoder::new(&config);
-            let mut frame = vec![0i16; FRAME_SAMPLES];
             loop {
-                // Pull a full 20 ms frame from the capture ring. The ring
+                let frame = match capture.read_frame() {
-                // may return a partial read when the CPAL callback hasn't
+                    Some(f) => f,
-                // produced enough samples yet — keep reading until we
+                    None => break,
-                // accumulate a whole frame, sleeping briefly on empty
+                };
-                // returns so we don't hot-spin the CPU.
-                let mut filled = 0usize;
-                while filled < FRAME_SAMPLES {
-                    let n = capture.ring().read(&mut frame[filled..]);
-                    filled += n;
-                    if n == 0 {
-                        std::thread::sleep(std::time::Duration::from_millis(2));
-                    }
-                }
                 let packets = match encoder.encode_frame(&frame) {
                     Ok(p) => p,
                     Err(e) => {
@@ -671,13 +599,7 @@ async fn run_live(transport: Arc<wzp_transport::QuinnTransport>) -> anyhow::Resu
                     // Repair packets feed the FEC decoder but don't produce audio.
                     if !is_repair {
                         if let Some(_n) = decoder.decode_next(&mut pcm_buf) {
-                            // Push the decoded frame into the playback
+                            playback.write_frame(&pcm_buf);
-                            // ring. The CPAL output callback drains from
-                            // here on its own clock; if the ring is full
-                            // (rare in CLI live mode) the write returns
-                            // a short count and the tail is dropped,
-                            // which is the correct real-time behavior.
-                            playback.ring().write(&pcm_buf);
                         }
                     }
                 }
@@ -702,194 +624,3 @@ async fn run_live(transport: Arc<wzp_transport::QuinnTransport>) -> anyhow::Resu
     info!("done");
     Ok(())
 }
-
-/// Persistent signaling mode for direct 1:1 calls.
-async fn run_signal_mode(
-    relay_addr: SocketAddr,
-    seed: wzp_crypto::Seed,
-    token: Option<String>,
-    call_target: Option<String>,
-) -> anyhow::Result<()> {
-    use wzp_proto::SignalMessage;
-
-    let identity = seed.derive_identity();
-    let pub_id = identity.public_identity();
-    let fp = pub_id.fingerprint.to_string();
-    let identity_pub = *pub_id.signing.as_bytes();
-    info!(fingerprint = %fp, "signal mode");
-
-    // Connect to relay with SNI "_signal"
-    let client_config = wzp_transport::client_config();
-    let bind_addr: SocketAddr = if relay_addr.is_ipv6() {
-        "[::]:0".parse()?
-    } else {
-        "0.0.0.0:0".parse()?
-    };
-    let endpoint = wzp_transport::create_endpoint(bind_addr, None)?;
-    let conn = wzp_transport::connect(&endpoint, relay_addr, "_signal", client_config).await?;
-    let transport = Arc::new(wzp_transport::QuinnTransport::new(conn));
-    info!("connected to relay (signal channel)");
-
-    // Auth if token provided
-    if let Some(ref tok) = token {
-        transport.send_signal(&SignalMessage::AuthToken { token: tok.clone() }).await?;
-    }
-
-    // Register presence (signature not verified in Phase 1)
-    transport.send_signal(&SignalMessage::RegisterPresence {
-        identity_pub,
-        signature: vec![], // Phase 1: not verified
-        alias: None,
-    }).await?;
-
-    // Wait for ack
-    match transport.recv_signal().await? {
-        Some(SignalMessage::RegisterPresenceAck { success: true, .. }) => {
-            info!(fingerprint = %fp, "registered on relay — waiting for calls");
-        }
-        Some(SignalMessage::RegisterPresenceAck { success: false, error }) => {
-            anyhow::bail!("registration failed: {}", error.unwrap_or_default());
-        }
-        other => {
-            anyhow::bail!("unexpected response: {other:?}");
-        }
-    }
-
-    // If --call specified, place the call
-    if let Some(ref target) = call_target {
-        info!(target = %target, "placing direct call...");
-        let call_id = format!("{:016x}", std::time::SystemTime::now()
-            .duration_since(std::time::UNIX_EPOCH).unwrap().as_nanos());
-
-        transport.send_signal(&SignalMessage::DirectCallOffer {
-            caller_fingerprint: fp.clone(),
-            caller_alias: None,
-            target_fingerprint: target.clone(),
-            call_id: call_id.clone(),
-            identity_pub,
-            ephemeral_pub: [0u8; 32], // Phase 1: not used for key exchange
-            signature: vec![],
-            supported_profiles: vec![wzp_proto::QualityProfile::GOOD],
-        }).await?;
-    }
-
-    // Signal recv loop — handle incoming signals
-    let signal_transport = transport.clone();
-    let relay = relay_addr;
-    let my_seed = seed.0;
-
-    loop {
-        match signal_transport.recv_signal().await {
-            Ok(Some(msg)) => match msg {
-                SignalMessage::CallRinging { call_id } => {
-                    info!(call_id = %call_id, "ringing...");
-                }
-                SignalMessage::DirectCallOffer { caller_fingerprint, caller_alias, call_id, .. } => {
-                    info!(
-                        from = %caller_fingerprint,
-                        alias = ?caller_alias,
-                        call_id = %call_id,
-                        "incoming call — auto-accepting (generic)"
-                    );
-                    // Auto-accept for CLI testing
-                    let _ = signal_transport.send_signal(&SignalMessage::DirectCallAnswer {
-                        call_id,
-                        accept_mode: wzp_proto::CallAcceptMode::AcceptGeneric,
-                        identity_pub: Some(identity_pub),
-                        ephemeral_pub: None,
-                        signature: None,
-                        chosen_profile: Some(wzp_proto::QualityProfile::GOOD),
-                    }).await;
-                }
-                SignalMessage::DirectCallAnswer { call_id, accept_mode, .. } => {
-                    info!(call_id = %call_id, mode = ?accept_mode, "call answered");
-                }
-                SignalMessage::CallSetup { call_id, room, relay_addr: setup_relay } => {
-                    info!(call_id = %call_id, room = %room, relay = %setup_relay, "call setup — connecting to media room");
-
-                    // Connect to the media room
-                    let media_relay: SocketAddr = setup_relay.parse().unwrap_or(relay);
-                    let media_cfg = wzp_transport::client_config();
-                    match wzp_transport::connect(&endpoint, media_relay, &room, media_cfg).await {
-                        Ok(media_conn) => {
-                            let media_transport = Arc::new(wzp_transport::QuinnTransport::new(media_conn));
-
-                            // Crypto handshake
-                            match wzp_client::handshake::perform_handshake(&*media_transport, &my_seed, None).await {
-                                Ok(_session) => {
-                                    info!("media connected — sending tone (press Ctrl+C to hang up)");
-
-                                    // Simple tone sender for testing
-                                    let mt = media_transport.clone();
-                                    let send_task = tokio::spawn(async move {
-                                        let config = wzp_client::call::CallConfig::default();
-                                        let mut encoder = wzp_client::call::CallEncoder::new(&config);
-                                        let duration = tokio::time::Duration::from_millis(20);
-                                        loop {
-                                            let pcm: Vec<i16> = (0..FRAME_SAMPLES)
-                                                .map(|_| 0i16) // silence — could be tone
-                                                .collect();
-                                            if let Ok(pkts) = encoder.encode_frame(&pcm) {
-                                                for pkt in &pkts {
-                                                    if mt.send_media(pkt).await.is_err() { return; }
-                                                }
-                                            }
-                                            tokio::time::sleep(duration).await;
-                                        }
-                                    });
-
-                                    // Wait for hangup or ctrl+c
-                                    loop {
-                                        tokio::select! {
-                                            sig = signal_transport.recv_signal() => {
-                                                match sig {
-                                                    Ok(Some(SignalMessage::Hangup { .. })) => {
-                                                        info!("remote hung up");
-                                                        break;
-                                                    }
-                                                    Ok(None) | Err(_) => break,
-                                                    _ => {}
-                                                }
-                                            }
-                                            _ = tokio::signal::ctrl_c() => {
-                                                info!("hanging up...");
-                                                let _ = signal_transport.send_signal(&SignalMessage::Hangup {
-                                                    reason: wzp_proto::HangupReason::Normal,
-                                                }).await;
-                                                break;
-                                            }
-                                        }
-                                    }
-
-                                    send_task.abort();
-                                    media_transport.close().await.ok();
-                                    info!("call ended");
-                                }
-                                Err(e) => error!("media handshake failed: {e}"),
-                            }
-                        }
-                        Err(e) => error!("media connect failed: {e}"),
-                    }
-                }
-                SignalMessage::Hangup { reason } => {
-                    info!(reason = ?reason, "call ended by remote");
-                }
-                SignalMessage::Pong { .. } => {}
-                other => {
-                    info!("signal: {:?}", std::mem::discriminant(&other));
-                }
-            },
-            Ok(None) => {
-                info!("signal connection closed");
-                break;
-            }
-            Err(e) => {
-                error!("signal error: {e}");
-                break;
-            }
-        }
-    }
-
-    transport.close().await.ok();
-    Ok(())
-}

crates/wzp-client/src/featherchat.rs

@@ -96,7 +96,6 @@ pub fn signal_to_call_type(signal: &SignalMessage) -> CallSignalType {
         SignalMessage::Hangup { .. } => CallSignalType::Hangup,
         SignalMessage::Rekey { .. } => CallSignalType::Offer, // reuse
         SignalMessage::QualityUpdate { .. } => CallSignalType::Offer, // reuse
-        SignalMessage::LossRecoveryUpdate { .. } => CallSignalType::Offer, // reuse (telemetry)
         SignalMessage::Ping { .. } | SignalMessage::Pong { .. } => CallSignalType::Offer,
         SignalMessage::AuthToken { .. } => CallSignalType::Offer,
         SignalMessage::Hold => CallSignalType::Hold,
@@ -111,15 +110,6 @@ pub fn signal_to_call_type(signal: &SignalMessage) -> CallSignalType {
         SignalMessage::SessionForward { .. } => CallSignalType::Offer, // reuse
         SignalMessage::SessionForwardAck { .. } => CallSignalType::Offer, // reuse
         SignalMessage::RoomUpdate { .. } => CallSignalType::Offer, // reuse
-        SignalMessage::FederationHello { .. }
-        | SignalMessage::GlobalRoomActive { .. }
-        | SignalMessage::GlobalRoomInactive { .. } => CallSignalType::Offer, // relay-only
-        SignalMessage::DirectCallOffer { .. } => CallSignalType::Offer,
-        SignalMessage::DirectCallAnswer { .. } => CallSignalType::Answer,
-        SignalMessage::CallSetup { .. } => CallSignalType::Offer, // relay-only
-        SignalMessage::CallRinging { .. } => CallSignalType::Ringing,
-        SignalMessage::RegisterPresence { .. }
-        | SignalMessage::RegisterPresenceAck { .. } => CallSignalType::Offer, // relay-only
     }
 }
 

crates/wzp-client/src/handshake.rs

@@ -38,9 +38,6 @@ pub async fn perform_handshake(
         ephemeral_pub,
         signature,
         supported_profiles: vec![
-            QualityProfile::STUDIO_64K,
-            QualityProfile::STUDIO_48K,
-            QualityProfile::STUDIO_32K,
             QualityProfile::GOOD,
             QualityProfile::DEGRADED,
             QualityProfile::CATASTROPHIC,

crates/wzp-client/src/lib.rs

@@ -8,24 +8,6 @@
 
 #[cfg(feature = "audio")]
 pub mod audio_io;
-#[cfg(feature = "audio")]
-pub mod audio_ring;
-// VoiceProcessingIO is an Apple Core Audio API — only compile the module
-// when the `vpio` feature is on AND we're targeting macOS. Enabling the
-// feature on Windows/Linux was previously silently broken.
-#[cfg(all(feature = "vpio", target_os = "macos"))]
-pub mod audio_vpio;
-// WASAPI-direct capture with Windows's OS-level AEC (AudioCategory_Communications).
-// Only compiled when `windows-aec` feature is on AND target is Windows. The
-// `windows` dependency is itself gated to Windows in Cargo.toml, so enabling
-// this feature on non-Windows targets is a no-op.
-#[cfg(all(feature = "windows-aec", target_os = "windows"))]
-pub mod audio_wasapi;
-// WebRTC AEC3 (Audio Processing Module) wrapper around CPAL capture + playback
-// on Linux. Only compiled when `linux-aec` feature is on AND target is Linux.
-// The webrtc-audio-processing dep is itself gated to Linux in Cargo.toml.
-#[cfg(all(feature = "linux-aec", target_os = "linux"))]
-pub mod audio_linux_aec;
 pub mod bench;
 pub mod call;
 pub mod drift_test;
@@ -35,48 +17,7 @@ pub mod handshake;
 pub mod metrics;
 pub mod sweep;
 
-// AudioPlayback: three possible backends depending on feature flags.
+#[cfg(feature = "audio")]
-//   1. Default CPAL (`audio_io::AudioPlayback`) — baseline on every platform.
+pub use audio_io::{AudioCapture, AudioPlayback};
-//   2. Linux AEC (`audio_linux_aec::LinuxAecPlayback`) — CPAL + WebRTC APM
-//      render-side tee, so echo from speakers gets cancelled from the mic.
-//
-// On macOS and Windows we always use the default CPAL playback because:
-//   - macOS: VoiceProcessingIO handles AEC at the capture side (Apple's
-//     native hardware AEC uses its own reference signal handling).
-//   - Windows: WASAPI AudioCategory_Communications AEC uses the system
-//     render mix as reference — no per-process plumbing needed.
-//
-// Linux is the only platform where the in-app approach is necessary, so
-// the AEC playback path is gated to target_os = "linux".
-
-#[cfg(all(
-    feature = "audio",
-    any(not(feature = "linux-aec"), not(target_os = "linux"))
-))]
-pub use audio_io::AudioPlayback;
-
-#[cfg(all(feature = "linux-aec", target_os = "linux"))]
-pub use audio_linux_aec::LinuxAecPlayback as AudioPlayback;
-
-// AudioCapture: three possible backends depending on feature flags.
-//   1. Default CPAL (`audio_io::AudioCapture`) — baseline on every platform.
-//   2. Windows AEC (`audio_wasapi::WasapiAudioCapture`) — direct WASAPI
-//      with AudioCategory_Communications, OS APO chain does AEC.
-//   3. Linux AEC (`audio_linux_aec::LinuxAecCapture`) — CPAL + WebRTC APM
-//      capture-side echo cancellation using the playback tee as reference.
-// All three expose the same public API (`start`, `ring`, `stop`, `Drop`).
-
-#[cfg(all(
-    feature = "audio",
-    any(not(feature = "windows-aec"), not(target_os = "windows")),
-    any(not(feature = "linux-aec"), not(target_os = "linux"))
-))]
-pub use audio_io::AudioCapture;
-
-#[cfg(all(feature = "windows-aec", target_os = "windows"))]
-pub use audio_wasapi::WasapiAudioCapture as AudioCapture;
-
-#[cfg(all(feature = "linux-aec", target_os = "linux"))]
-pub use audio_linux_aec::LinuxAecCapture as AudioCapture;
 pub use call::{CallConfig, CallDecoder, CallEncoder};
 pub use handshake::perform_handshake;

crates/wzp-codec/Cargo.toml

@@ -10,17 +10,8 @@ description = "WarzonePhone audio codec layer — Opus + Codec2 encoding/decodin
 wzp-proto = { workspace = true }
 tracing = { workspace = true }
 
-# Opus bindings — libopus 1.5.2.
+# Opus bindings
-# opusic-c for the encoder (set_dred_duration lives here in Phase 1).
+audiopus = { workspace = true }
-# opusic-sys for the decoder — we wrap the raw *mut OpusDecoder ourselves
-# because opusic-c::Decoder.inner is pub(crate), blocking the unified
-# decoder + DRED path we need in Phase 3.
-opusic-c = { workspace = true }
-opusic-sys = { workspace = true }
-
-# Zero-cost slice reinterpretation for the i16 ↔ u16 boundary between
-# our PCM buffers and opusic-c's encode API.
-bytemuck = { workspace = true }
 
 # Pure-Rust Codec2 implementation
 codec2 = { workspace = true }

crates/wzp-codec/src/adaptive.rs

@@ -199,27 +199,6 @@ impl AdaptiveDecoder {
     fn codec2_frame_samples(&self) -> usize {
         self.codec2.frame_samples()
     }
-
-    /// Reconstruct a lost frame from a previously parsed DRED state.
-    ///
-    /// Phase 3b entry point for gap reconstruction. Dispatches to the
-    /// inner Opus decoder when active. Returns an error if the active
-    /// codec is Codec2 — DRED is libopus-only and has no Codec2 equivalent,
-    /// so callers must fall back to classical PLC on Codec2 tiers.
-    pub fn reconstruct_from_dred(
-        &mut self,
-        state: &crate::dred_ffi::DredState,
-        offset_samples: i32,
-        output: &mut [i16],
-    ) -> Result<usize, CodecError> {
-        if is_codec2(self.active) {
-            return Err(CodecError::DecodeFailed(
-                "DRED reconstruction is Opus-only; Codec2 must use classical PLC".into(),
-            ));
-        }
-        self.opus
-            .reconstruct_from_dred(state, offset_samples, output)
-    }
 }
 
 // ─── Tests ───────────────────────────────────────────────────────────────────

crates/wzp-codec/src/aec.rs

@@ -1,127 +1,53 @@
-//! Acoustic Echo Cancellation — delay-compensated leaky NLMS with
+//! Acoustic Echo Cancellation using NLMS adaptive filter.
-//! Geigel double-talk detection.
+//! Processes 480-sample (10ms) sub-frames at 48kHz.
-//!
-//! Key insight: on a laptop, the round-trip audio latency (playout → speaker
-//! → air → mic → capture) is 30–50ms.  The far-end reference must be delayed
-//! by this amount so the adaptive filter models the *echo path*, not the
-//! *system delay + echo path*.
-//!
-//! The leaky coefficient decay prevents the filter from diverging when the
-//! echo path changes (e.g. hand near laptop) or when the delay estimate
-//! is slightly off.
 
-/// Delay-compensated leaky NLMS echo canceller with Geigel DTD.
+/// NLMS (Normalized Least Mean Squares) adaptive filter echo canceller.
+///
+/// Removes acoustic echo by modelling the echo path between the far-end
+/// (speaker) signal and the near-end (microphone) signal, then subtracting
+/// the estimated echo from the near-end in real time.
 pub struct EchoCanceller {
-    // --- Adaptive filter ---
+    filter_coeffs: Vec<f32>,
-    filter: Vec<f32>,
     filter_len: usize,
-    /// Circular buffer of far-end reference samples (after delay).
+    far_end_buf: Vec<f32>,
-    far_buf: Vec<f32>,
+    far_end_pos: usize,
-    far_pos: usize,
-    /// NLMS step size.
     mu: f32,
-    /// Leakage factor: coefficients are multiplied by (1 - leak) each frame.
-    /// Prevents unbounded growth / divergence.  0.0001 is gentle.
-    leak: f32,
     enabled: bool,
-
-    // --- Delay buffer ---
-    /// Raw far-end samples before delay compensation.
-    delay_ring: Vec<f32>,
-    delay_write: usize,
-    delay_read: usize,
-    /// Delay in samples (e.g. 1920 = 40ms at 48kHz).
-    delay_samples: usize,
-    /// Capacity of the delay ring.
-    delay_cap: usize,
-
-    // --- Double-talk detection (Geigel) ---
-    /// Peak far-end level over the last filter_len samples.
-    far_peak: f32,
-    /// Geigel threshold: if |near| > threshold * far_peak, assume double-talk.
-    geigel_threshold: f32,
-    /// Holdover counter: keep DTD active for a few frames after detection.
-    dtd_holdover: u32,
-    dtd_hold_frames: u32,
 }
 
 impl EchoCanceller {
     /// Create a new echo canceller.
     ///
     /// * `sample_rate` — typically 48000
-    /// * `filter_ms`   — echo-tail length in milliseconds (60ms recommended)
+    /// * `filter_ms`   — echo-tail length in milliseconds (e.g. 100 for 100 ms)
-    /// * `delay_ms`    — far-end delay compensation in milliseconds (40ms for laptops)
     pub fn new(sample_rate: u32, filter_ms: u32) -> Self {
-        Self::with_delay(sample_rate, filter_ms, 40)
-    }
-
-    pub fn with_delay(sample_rate: u32, filter_ms: u32, delay_ms: u32) -> Self {
         let filter_len = (sample_rate as usize) * (filter_ms as usize) / 1000;
-        let delay_samples = (sample_rate as usize) * (delay_ms as usize) / 1000;
-        // Delay ring must hold at least delay_samples + one frame (960) of headroom.
-        let delay_cap = delay_samples + (sample_rate as usize / 10); // +100ms headroom
         Self {
-            filter: vec![0.0; filter_len],
+            filter_coeffs: vec![0.0f32; filter_len],
             filter_len,
-            far_buf: vec![0.0; filter_len],
+            far_end_buf: vec![0.0f32; filter_len],
-            far_pos: 0,
+            far_end_pos: 0,
             mu: 0.01,
-            leak: 0.0001,
             enabled: true,
-
-            delay_ring: vec![0.0; delay_cap],
-            delay_write: 0,
-            delay_read: 0,
-            delay_samples,
-            delay_cap,
-
-            far_peak: 0.0,
-            geigel_threshold: 0.7,
-            dtd_holdover: 0,
-            dtd_hold_frames: 5,
         }
     }
 
-    /// Feed far-end (speaker) samples.  These go into the delay buffer first;
+    /// Feed far-end (speaker/playback) samples into the circular buffer.
-    /// once enough samples have accumulated, they are released to the filter's
+    ///
-    /// circular buffer with the correct delay offset.
+    /// Must be called with the audio that was played out through the speaker
+    /// *before* the corresponding near-end frame is processed.
     pub fn feed_farend(&mut self, farend: &[i16]) {
-        // Write raw samples into the delay ring.
         for &s in farend {
-            self.delay_ring[self.delay_write % self.delay_cap] = s as f32;
+            self.far_end_buf[self.far_end_pos] = s as f32;
-            self.delay_write += 1;
+            self.far_end_pos = (self.far_end_pos + 1) % self.filter_len;
-        }
-
-        // Release delayed samples to the filter's far-end buffer.
-        while self.delay_available() >= 1 {
-            let sample = self.delay_ring[self.delay_read % self.delay_cap];
-            self.delay_read += 1;
-
-            self.far_buf[self.far_pos] = sample;
-            self.far_pos = (self.far_pos + 1) % self.filter_len;
-
-            // Track peak far-end level for Geigel DTD.
-            let abs_s = sample.abs();
-            if abs_s > self.far_peak {
-                self.far_peak = abs_s;
-            }
-        }
-
-        // Decay far_peak slowly (avoids stale peak from a loud burst long ago).
-        self.far_peak *= 0.9995;
-    }
-
-    /// Number of delayed samples available to release.
-    fn delay_available(&self) -> usize {
-        let buffered = self.delay_write - self.delay_read;
-        if buffered > self.delay_samples {
-            buffered - self.delay_samples
-        } else {
-            0
         }
     }
 
     /// Process a near-end (microphone) frame, removing the estimated echo.
+    ///
+    /// Returns the echo-return-loss enhancement (ERLE) as a ratio: the RMS of
+    /// the original near-end divided by the RMS of the residual.  Values > 1.0
+    /// mean echo was reduced.
     pub fn process_frame(&mut self, nearend: &mut [i16]) -> f32 {
         if !self.enabled {
             return 1.0;
@@ -130,96 +56,85 @@ impl EchoCanceller {
         let n = nearend.len();
         let fl = self.filter_len;
 
-        // --- Geigel double-talk detection ---
-        // If any near-end sample exceeds threshold * far_peak, assume
-        // the local speaker is active and freeze adaptation.
-        let mut is_doubletalk = self.dtd_holdover > 0;
-        if !is_doubletalk {
-            let threshold_level = self.geigel_threshold * self.far_peak;
-            for &s in nearend.iter() {
-                if (s as f32).abs() > threshold_level && self.far_peak > 100.0 {
-                    is_doubletalk = true;
-                    self.dtd_holdover = self.dtd_hold_frames;
-                    break;
-                }
-            }
-        }
-        if self.dtd_holdover > 0 {
-            self.dtd_holdover -= 1;
-        }
-
-        // Check if far-end is active (otherwise nothing to cancel).
-        let far_active = self.far_peak > 100.0;
-
-        // --- Leaky coefficient decay ---
-        // Applied once per frame for efficiency.
-        let decay = 1.0 - self.leak;
-        for c in self.filter.iter_mut() {
-            *c *= decay;
-        }
-
         let mut sum_near_sq: f64 = 0.0;
         let mut sum_err_sq: f64 = 0.0;
 
         for i in 0..n {
             let near_f = nearend[i] as f32;
 
-            // Position of far-end "now" for this near-end sample.
+            // --- estimate echo as dot(coeffs, farend_window) ---
-            let base = (self.far_pos + fl * ((n / fl) + 2) + i - n) % fl;
+            // The far-end window for this sample starts at
-
+            //   (far_end_pos - 1 - i) mod filter_len   (most recent)
-            // --- Echo estimation: dot(filter, far_end_window) ---
+            // and goes back filter_len samples.
             let mut echo_est: f32 = 0.0;
             let mut power: f32 = 0.0;
 
+            // Position of the most-recent far-end sample for this near-end sample.
+            // far_end_pos points to the *next write* position, so the most-recent
+            // sample written is at far_end_pos - 1.  We have already called
+            // feed_farend for this block, so the relevant samples are the last
+            // filter_len entries ending just before the current write position,
+            // offset by how far we are into this near-end frame.
+            //
+            // For sample i of the near-end frame, the corresponding far-end
+            // "now" is far_end_pos - n + i  (wrapping).
+            // far_end_pos points to next-write, so most recent sample is at
+            // far_end_pos - 1.  For the i-th near-end sample we want the
+            // far-end "now" to be at (far_end_pos - n + i).  We add fl
+            // repeatedly to avoid underflow on the usize subtraction.
+            let base = (self.far_end_pos + fl * ((n / fl) + 2) + i - n) % fl;
+
             for k in 0..fl {
                 let fe_idx = (base + fl - k) % fl;
-                let fe = self.far_buf[fe_idx];
+                let fe = self.far_end_buf[fe_idx];
-                echo_est += self.filter[k] * fe;
+                echo_est += self.filter_coeffs[k] * fe;
                 power += fe * fe;
             }
 
             let error = near_f - echo_est;
 
-            // --- NLMS adaptation (only when far-end active & no double-talk) ---
+            // --- NLMS coefficient update ---
-            if far_active && !is_doubletalk && power > 10.0 {
+            let norm = power + 1.0; // +1 regularisation to avoid div-by-zero
-                let step = self.mu * error / (power + 1.0);
+            let step = self.mu * error / norm;
+
             for k in 0..fl {
                 let fe_idx = (base + fl - k) % fl;
-                    self.filter[k] += step * self.far_buf[fe_idx];
+                let fe = self.far_end_buf[fe_idx];
-                }
+                self.filter_coeffs[k] += step * fe;
             }
 
-            let out = error.clamp(-32768.0, 32767.0);
+            // Clamp output
+            let out = error.max(-32768.0).min(32767.0);
             nearend[i] = out as i16;
 
-            sum_near_sq += (near_f as f64).powi(2);
+            sum_near_sq += (near_f as f64) * (near_f as f64);
-            sum_err_sq += (out as f64).powi(2);
+            sum_err_sq += (out as f64) * (out as f64);
         }
 
+        // ERLE ratio
         if sum_err_sq < 1.0 {
-            100.0
+            return 100.0; // near-perfect cancellation
-        } else {
+        }
         (sum_near_sq / sum_err_sq).sqrt() as f32
     }
-    }
 
+    /// Enable or disable echo cancellation.
     pub fn set_enabled(&mut self, enabled: bool) {
         self.enabled = enabled;
     }
 
+    /// Returns whether echo cancellation is currently enabled.
     pub fn is_enabled(&self) -> bool {
         self.enabled
     }
 
+    /// Reset the adaptive filter to its initial state.
+    ///
+    /// Zeroes out all filter coefficients and the far-end circular buffer.
     pub fn reset(&mut self) {
-        self.filter.iter_mut().for_each(|c| *c = 0.0);
+        self.filter_coeffs.iter_mut().for_each(|c| *c = 0.0);
-        self.far_buf.iter_mut().for_each(|s| *s = 0.0);
+        self.far_end_buf.iter_mut().for_each(|s| *s = 0.0);
-        self.far_pos = 0;
+        self.far_end_pos = 0;
-        self.far_peak = 0.0;
-        self.delay_ring.iter_mut().for_each(|s| *s = 0.0);
-        self.delay_write = 0;
-        self.delay_read = 0;
-        self.dtd_holdover = 0;
     }
 }
 
@@ -228,40 +143,50 @@ mod tests {
     use super::*;
 
     #[test]
-    fn creates_with_correct_sizes() {
+    fn aec_creates_with_correct_filter_len() {
-        let aec = EchoCanceller::with_delay(48000, 60, 40);
+        let aec = EchoCanceller::new(48000, 100);
-        assert_eq!(aec.filter_len, 2880); // 60ms @ 48kHz
+        assert_eq!(aec.filter_len, 4800);
-        assert_eq!(aec.delay_samples, 1920); // 40ms @ 48kHz
+        assert_eq!(aec.filter_coeffs.len(), 4800);
+        assert_eq!(aec.far_end_buf.len(), 4800);
     }
 
     #[test]
-    fn passthrough_when_disabled() {
+    fn aec_passthrough_when_disabled() {
-        let mut aec = EchoCanceller::new(48000, 60);
+        let mut aec = EchoCanceller::new(48000, 100);
         aec.set_enabled(false);
+        assert!(!aec.is_enabled());
 
-        let original: Vec<i16> = (0..960).map(|i| (i * 10) as i16).collect();
+        let original: Vec<i16> = (0..480).map(|i| (i * 10) as i16).collect();
         let mut frame = original.clone();
-        aec.process_frame(&mut frame);
+        let erle = aec.process_frame(&mut frame);
+        assert_eq!(erle, 1.0);
         assert_eq!(frame, original);
     }
 
     #[test]
-    fn silence_passthrough() {
+    fn aec_reset_zeroes_state() {
-        let mut aec = EchoCanceller::with_delay(48000, 30, 0);
+        let mut aec = EchoCanceller::new(48000, 10); // short for test speed
-        aec.feed_farend(&vec![0i16; 960]);
+        let farend: Vec<i16> = (0..480).map(|i| ((i * 37) % 1000) as i16).collect();
-        let mut frame = vec![0i16; 960];
+        aec.feed_farend(&farend);
-        aec.process_frame(&mut frame);
+
-        assert!(frame.iter().all(|&s| s == 0));
+        aec.reset();
+
+        assert!(aec.filter_coeffs.iter().all(|&c| c == 0.0));
+        assert!(aec.far_end_buf.iter().all(|&s| s == 0.0));
+        assert_eq!(aec.far_end_pos, 0);
     }
 
     #[test]
-    fn reduces_echo_with_no_delay() {
+    fn aec_reduces_echo_of_known_signal() {
-        // Simulate: far-end plays, echo arrives at mic attenuated by ~50%
+        // Use a small filter for speed.  Feed a known far-end signal, then
-        // (realistic — speaker to mic on laptop loses volume).
+        // present the *same* signal as near-end (perfect echo, no room).
-        let mut aec = EchoCanceller::with_delay(48000, 10, 0);
+        // After adaptation the output energy should drop.
+        let filter_ms = 5; // 240 taps at 48 kHz
+        let mut aec = EchoCanceller::new(48000, filter_ms);
 
-        let frame_len = 480;
+        // Generate a simple repeating pattern.
-        let make_tone = |offset: usize| -> Vec<i16> {
+        let frame_len = 480usize;
+        let make_frame = |offset: usize| -> Vec<i16> {
             (0..frame_len)
                 .map(|i| {
                     let t = (offset + i) as f64 / 48000.0;
@@ -270,16 +195,18 @@ mod tests {
                 .collect()
         };
 
+        // Warm up the adaptive filter with several frames.
         let mut last_erle = 1.0f32;
-        for frame_idx in 0..100 {
+        for frame_idx in 0..40 {
-            let farend = make_tone(frame_idx * frame_len);
+            let farend = make_frame(frame_idx * frame_len);
             aec.feed_farend(&farend);
 
-            // Near-end = attenuated copy of far-end (echo at ~50% volume).
+            // Near-end = exact copy of far-end (pure echo).
-            let mut nearend: Vec<i16> = farend.iter().map(|&s| s / 2).collect();
+            let mut nearend = farend.clone();
             last_erle = aec.process_frame(&mut nearend);
         }
 
+        // After 40 frames the ERLE should be meaningfully > 1.
         assert!(
             last_erle > 1.0,
             "expected ERLE > 1.0 after adaptation, got {last_erle}"
@@ -287,49 +214,15 @@ mod tests {
     }
 
     #[test]
-    fn preserves_nearend_during_doubletalk() {
+    fn aec_silence_passthrough() {
-        let mut aec = EchoCanceller::with_delay(48000, 30, 0);
+        let mut aec = EchoCanceller::new(48000, 10);
-
+        // Feed silence far-end
-        let frame_len = 960;
+        aec.feed_farend(&vec![0i16; 480]);
-        let nearend: Vec<i16> = (0..frame_len)
+        // Near-end is silence too
-            .map(|i| {
+        let mut frame = vec![0i16; 480];
-                let t = i as f64 / 48000.0;
+        let erle = aec.process_frame(&mut frame);
-                (10000.0 * (2.0 * std::f64::consts::PI * 440.0 * t).sin()) as i16
+        assert!(erle >= 1.0);
-            })
+        // Output should still be silence
-            .collect();
+        assert!(frame.iter().all(|&s| s == 0));
-
-        // Feed silence as far-end (no echo source).
-        aec.feed_farend(&vec![0i16; frame_len]);
-
-        let mut frame = nearend.clone();
-        aec.process_frame(&mut frame);
-
-        let input_energy: f64 = nearend.iter().map(|&s| (s as f64).powi(2)).sum();
-        let output_energy: f64 = frame.iter().map(|&s| (s as f64).powi(2)).sum();
-        let ratio = output_energy / input_energy;
-
-        assert!(
-            ratio > 0.8,
-            "near-end speech should be preserved, energy ratio = {ratio:.3}"
-        );
-    }
-
-    #[test]
-    fn delay_buffer_holds_samples() {
-        let mut aec = EchoCanceller::with_delay(48000, 10, 20);
-        // 20ms delay = 960 samples @ 48kHz.
-        // After feeding, feed_farend auto-drains available samples to far_buf.
-        // So delay_available() is always 0 after feed_farend returns.
-        // Instead, verify far_pos advances only after the delay is filled.
-
-        // Feed 960 samples (= delay amount). No samples released yet.
-        aec.feed_farend(&vec![1i16; 960]);
-        // far_buf should still be all zeros (nothing released).
-        assert!(aec.far_buf.iter().all(|&s| s == 0.0), "nothing should be released yet");
-
-        // Feed 480 more. 480 should be released to far_buf.
-        aec.feed_farend(&vec![2i16; 480]);
-        let non_zero = aec.far_buf.iter().filter(|&&s| s != 0.0).count();
-        assert!(non_zero > 0, "samples should have been released to far_buf");
     }
 }

crates/wzp-codec/src/dred_ffi.rs

@@ -1,585 +0,0 @@
-//! Raw opusic-sys FFI wrappers for libopus 1.5.2 decoder + DRED reconstruction.
-//!
-//! # Why this module exists
-//!
-//! We cannot use `opusic_c::Decoder` because its inner `*mut OpusDecoder`
-//! pointer is `pub(crate)` — not reachable from outside the opusic-c crate.
-//! Phase 3 of the DRED integration needs to hand that same pointer to
-//! `opus_decoder_dred_decode`, and running two parallel decoders (one from
-//! opusic-c for normal audio, another from opusic-sys for DRED) would cause
-//! the DRED-only decoder's internal state to drift out of sync with the
-//! audio stream because it would not see normal decode calls.
-//!
-//! The fix is to own the raw decoder ourselves and use the same handle for
-//! both normal decode AND DRED reconstruction. This module is the single
-//! owner of `*mut OpusDecoder`, `*mut OpusDREDDecoder`, and `*mut OpusDRED`
-//! in the WZP workspace.
-//!
-//! # Phase 3a scope
-//!
-//! Phase 0 added `DecoderHandle` (normal decode). Phase 3a adds:
-//! - [`DredDecoderHandle`] — wraps `*mut OpusDREDDecoder` for parsing DRED
-//!   side-channel data out of arriving Opus packets.
-//! - [`DredState`] — wraps `*mut OpusDRED` (a fixed 10,592-byte buffer
-//!   allocated by libopus) that holds parsed DRED state between the parse
-//!   and reconstruct steps.
-//! - [`DredDecoderHandle::parse_into`] — wraps `opus_dred_parse`.
-//! - [`DecoderHandle::reconstruct_from_dred`] — wraps `opus_decoder_dred_decode`.
-//!
-//! The pattern is: on every arriving Opus packet, the receiver calls
-//! `parse_into` with a reusable `DredState`, then stores (seq, state_clone)
-//! in a ring. On detected loss, the receiver computes the offset from the
-//! freshest reachable DRED state and calls `reconstruct_from_dred` to
-//! synthesize the missing audio.
-
-use std::ptr::NonNull;
-
-use opusic_sys::{
-    OPUS_OK, OpusDRED, OpusDREDDecoder, OpusDecoder as RawOpusDecoder, opus_decode,
-    opus_decoder_create, opus_decoder_destroy, opus_decoder_dred_decode, opus_dred_alloc,
-    opus_dred_decoder_create, opus_dred_decoder_destroy, opus_dred_free, opus_dred_parse,
-};
-use wzp_proto::CodecError;
-
-/// libopus operates at 48 kHz for all Opus variants we use.
-const SAMPLE_RATE_HZ: i32 = 48_000;
-/// Mono.
-const CHANNELS: i32 = 1;
-
-/// Safe owner of a `*mut OpusDecoder` allocated via `opus_decoder_create`.
-///
-/// Releases the decoder in `Drop`. All FFI access goes through `&mut self`
-/// methods, so there is no aliasing or race. The raw pointer is exposed via
-/// [`Self::as_raw_ptr`] at a crate-internal visibility for the future Phase 3
-/// DRED reconstruction path — external crates cannot reach it.
-pub struct DecoderHandle {
-    inner: NonNull<RawOpusDecoder>,
-}
-
-impl DecoderHandle {
-    /// Allocate a new Opus decoder at 48 kHz mono.
-    pub fn new() -> Result<Self, CodecError> {
-        let mut error: i32 = OPUS_OK;
-        // SAFETY: opus_decoder_create writes to `error` and returns either a
-        // valid heap pointer or null. We check both before constructing the
-        // NonNull wrapper.
-        let ptr = unsafe { opus_decoder_create(SAMPLE_RATE_HZ, CHANNELS, &mut error) };
-        if error != OPUS_OK {
-            // Even if ptr is non-null on error, libopus contracts guarantee
-            // it is unusable — do not attempt to free it.
-            return Err(CodecError::DecodeFailed(format!(
-                "opus_decoder_create failed: err={error}"
-            )));
-        }
-        let inner = NonNull::new(ptr).ok_or_else(|| {
-            CodecError::DecodeFailed("opus_decoder_create returned null".into())
-        })?;
-        Ok(Self { inner })
-    }
-
-    /// Decode an Opus packet into PCM samples.
-    ///
-    /// `pcm` must have enough capacity for the frame (960 for 20 ms, 1920
-    /// for 40 ms at 48 kHz mono). Returns the number of decoded samples
-    /// per channel — for mono streams this equals the total sample count.
-    pub fn decode(&mut self, packet: &[u8], pcm: &mut [i16]) -> Result<usize, CodecError> {
-        if packet.is_empty() {
-            return Err(CodecError::DecodeFailed("empty packet".into()));
-        }
-        if pcm.is_empty() {
-            return Err(CodecError::DecodeFailed("empty output buffer".into()));
-        }
-        // SAFETY: self.inner is a valid *mut OpusDecoder owned by this struct.
-        // `data` / `pcm` are live Rust slices, so their pointers and lengths
-        // are valid for the duration of the call. libopus reads len bytes
-        // from data and writes up to frame_size samples (per channel) to pcm.
-        let n = unsafe {
-            opus_decode(
-                self.inner.as_ptr(),
-                packet.as_ptr(),
-                packet.len() as i32,
-                pcm.as_mut_ptr(),
-                pcm.len() as i32,
-                /* decode_fec = */ 0,
-            )
-        };
-        if n < 0 {
-            return Err(CodecError::DecodeFailed(format!(
-                "opus_decode failed: err={n}"
-            )));
-        }
-        Ok(n as usize)
-    }
-
-    /// Generate packet-loss concealment audio for a missing frame.
-    ///
-    /// Implemented via `opus_decode` with a null data pointer, per the
-    /// libopus API contract. `pcm` should be sized for the expected frame.
-    pub fn decode_lost(&mut self, pcm: &mut [i16]) -> Result<usize, CodecError> {
-        if pcm.is_empty() {
-            return Err(CodecError::DecodeFailed("empty output buffer".into()));
-        }
-        // SAFETY: same invariants as decode(). libopus documents that passing
-        // a null data pointer with len=0 triggers PLC synthesis into pcm.
-        let n = unsafe {
-            opus_decode(
-                self.inner.as_ptr(),
-                std::ptr::null(),
-                0,
-                pcm.as_mut_ptr(),
-                pcm.len() as i32,
-                /* decode_fec = */ 0,
-            )
-        };
-        if n < 0 {
-            return Err(CodecError::DecodeFailed(format!(
-                "opus_decode PLC failed: err={n}"
-            )));
-        }
-        Ok(n as usize)
-    }
-
-    /// Reconstruct audio from a `DredState` into the `output` buffer.
-    ///
-    /// `offset_samples` is the sample position (positive, measured backward
-    /// from the packet anchor that produced `state`) where reconstruction
-    /// begins. `output.len()` must match the number of samples to synthesize.
-    ///
-    /// The libopus API: `opus_decoder_dred_decode(st, dred, dred_offset, pcm,
-    /// frame_size)` where `dred_offset` is "position of the redundancy to
-    /// decode, in samples before the beginning of the real audio data in the
-    /// packet." Valid values: `0 < offset_samples < state.samples_available()`.
-    ///
-    /// Returns the number of samples actually written (should equal
-    /// `output.len()` on success).
-    pub fn reconstruct_from_dred(
-        &mut self,
-        state: &DredState,
-        offset_samples: i32,
-        output: &mut [i16],
-    ) -> Result<usize, CodecError> {
-        if output.is_empty() {
-            return Err(CodecError::DecodeFailed(
-                "empty reconstruction output buffer".into(),
-            ));
-        }
-        if offset_samples <= 0 {
-            return Err(CodecError::DecodeFailed(format!(
-                "DRED offset must be positive (got {offset_samples})"
-            )));
-        }
-        if offset_samples > state.samples_available() {
-            return Err(CodecError::DecodeFailed(format!(
-                "DRED offset {offset_samples} exceeds available samples {}",
-                state.samples_available()
-            )));
-        }
-        // SAFETY: self.inner is a valid *mut OpusDecoder, state.inner is a
-        // valid *const OpusDRED populated by a prior parse_into call, and
-        // output is a live mutable slice. libopus reads from dred and writes
-        // exactly frame_size samples (the output.len()) to pcm.
-        let n = unsafe {
-            opus_decoder_dred_decode(
-                self.inner.as_ptr(),
-                state.inner.as_ptr(),
-                offset_samples,
-                output.as_mut_ptr(),
-                output.len() as i32,
-            )
-        };
-        if n < 0 {
-            return Err(CodecError::DecodeFailed(format!(
-                "opus_decoder_dred_decode failed: err={n}"
-            )));
-        }
-        Ok(n as usize)
-    }
-}
-
-impl Drop for DecoderHandle {
-    fn drop(&mut self) {
-        // SAFETY: we own the pointer and no further access happens after
-        // this call because Drop consumes self.
-        unsafe { opus_decoder_destroy(self.inner.as_ptr()) };
-    }
-}
-
-// SAFETY: The underlying OpusDecoder is a plain heap allocation with no
-// thread-local or lock-free state. It is safe to move between threads
-// (Send), and all method access is gated by &mut self so Rust's borrow
-// checker prevents simultaneous access from multiple threads (Sync).
-unsafe impl Send for DecoderHandle {}
-unsafe impl Sync for DecoderHandle {}
-
-// ─── DRED decoder (parser) ──────────────────────────────────────────────────
-
-/// Safe owner of a `*mut OpusDREDDecoder` allocated via
-/// `opus_dred_decoder_create`.
-///
-/// The DRED decoder is a **separate** libopus object from the regular
-/// `OpusDecoder`. It's used exclusively for parsing DRED side-channel data
-/// out of arriving Opus packets via [`Self::parse_into`]. Actual audio
-/// reconstruction from the parsed state uses the regular `DecoderHandle`
-/// via [`DecoderHandle::reconstruct_from_dred`].
-pub struct DredDecoderHandle {
-    inner: NonNull<OpusDREDDecoder>,
-}
-
-impl DredDecoderHandle {
-    /// Allocate a new DRED decoder.
-    pub fn new() -> Result<Self, CodecError> {
-        let mut error: i32 = OPUS_OK;
-        // SAFETY: opus_dred_decoder_create writes to `error` and returns
-        // either a valid heap pointer or null. Both are checked.
-        let ptr = unsafe { opus_dred_decoder_create(&mut error) };
-        if error != OPUS_OK {
-            return Err(CodecError::DecodeFailed(format!(
-                "opus_dred_decoder_create failed: err={error}"
-            )));
-        }
-        let inner = NonNull::new(ptr).ok_or_else(|| {
-            CodecError::DecodeFailed("opus_dred_decoder_create returned null".into())
-        })?;
-        Ok(Self { inner })
-    }
-
-    /// Parse DRED side-channel data from an Opus packet into `state`.
-    ///
-    /// Returns the number of samples of audio history available for
-    /// reconstruction, or 0 if the packet carries no DRED data. Subsequent
-    /// `DecoderHandle::reconstruct_from_dred` calls using this `state` can
-    /// reconstruct any sample position in `(0, samples_available]`.
-    ///
-    /// libopus API: `opus_dred_parse(dred_dec, dred, data, len,
-    /// max_dred_samples, sampling_rate, dred_end, defer_processing)`. We
-    /// pass `max_dred_samples = 48000` (1 s at 48 kHz, the DRED maximum),
-    /// `sampling_rate = 48000`, `defer_processing = 0` (process immediately).
-    /// The `dred_end` output is the silence gap at the tail of the DRED
-    /// window; we subtract it from the total offset to give callers the
-    /// truly usable sample count.
-    pub fn parse_into(
-        &mut self,
-        state: &mut DredState,
-        packet: &[u8],
-    ) -> Result<i32, CodecError> {
-        if packet.is_empty() {
-            state.samples_available = 0;
-            return Ok(0);
-        }
-        let mut dred_end: i32 = 0;
-        // SAFETY: self.inner is a valid *mut OpusDREDDecoder; state.inner is
-        // a valid *mut OpusDRED allocated via opus_dred_alloc; packet is a
-        // live slice; dred_end is a stack int. libopus reads packet bytes
-        // and writes parsed DRED state into *state.inner.
-        let ret = unsafe {
-            opus_dred_parse(
-                self.inner.as_ptr(),
-                state.inner.as_ptr(),
-                packet.as_ptr(),
-                packet.len() as i32,
-                /* max_dred_samples = */ 48_000, // 1s max per libopus 1.5
-                /* sampling_rate = */ 48_000,
-                &mut dred_end,
-                /* defer_processing = */ 0,
-            )
-        };
-        if ret < 0 {
-            state.samples_available = 0;
-            return Err(CodecError::DecodeFailed(format!(
-                "opus_dred_parse failed: err={ret}"
-            )));
-        }
-        // ret is the positive offset of the first decodable DRED sample,
-        // or 0 if no DRED is present. dred_end is the silence gap at the
-        // tail. The usable sample range is (dred_end, ret], so the count
-        // of usable samples is ret - dred_end. We store `ret` as the max
-        // usable offset — callers should pass dred_offset values in the
-        // range (dred_end, ret] to reconstruct_from_dred. For simplicity
-        // we expose just samples_available = ret and let callers treat
-        // the full window as valid (the silence gap is small and libopus
-        // handles minor boundary cases gracefully).
-        state.samples_available = ret;
-        Ok(ret)
-    }
-}
-
-impl Drop for DredDecoderHandle {
-    fn drop(&mut self) {
-        // SAFETY: we own the pointer and no further access happens after
-        // this call because Drop consumes self.
-        unsafe { opus_dred_decoder_destroy(self.inner.as_ptr()) };
-    }
-}
-
-// SAFETY: same reasoning as DecoderHandle — heap allocation with no
-// thread-local state, &mut self access discipline prevents races.
-unsafe impl Send for DredDecoderHandle {}
-unsafe impl Sync for DredDecoderHandle {}
-
-// ─── DRED state buffer ──────────────────────────────────────────────────────
-
-/// Safe owner of a `*mut OpusDRED` allocated via `opus_dred_alloc`.
-///
-/// Holds a fixed-size (10,592-byte per libopus 1.5) buffer that
-/// `DredDecoderHandle::parse_into` populates from an Opus packet. The state
-/// is reusable — the caller can call `parse_into` again on the same
-/// `DredState` to overwrite it with a fresh packet's data.
-///
-/// `samples_available` tracks the last-parsed result so reconstruction
-/// callers don't need to thread the return value separately. A fresh
-/// state (before any `parse_into`) has `samples_available == 0`.
-pub struct DredState {
-    inner: NonNull<OpusDRED>,
-    samples_available: i32,
-}
-
-impl DredState {
-    /// Allocate a new DRED state buffer.
-    pub fn new() -> Result<Self, CodecError> {
-        let mut error: i32 = OPUS_OK;
-        // SAFETY: opus_dred_alloc writes to `error` and returns either a
-        // valid heap pointer or null.
-        let ptr = unsafe { opus_dred_alloc(&mut error) };
-        if error != OPUS_OK {
-            return Err(CodecError::DecodeFailed(format!(
-                "opus_dred_alloc failed: err={error}"
-            )));
-        }
-        let inner = NonNull::new(ptr)
-            .ok_or_else(|| CodecError::DecodeFailed("opus_dred_alloc returned null".into()))?;
-        Ok(Self {
-            inner,
-            samples_available: 0,
-        })
-    }
-
-    /// How many samples of audio history this state currently covers.
-    ///
-    /// Returns 0 if the state is fresh or the last parse found no DRED
-    /// data. Otherwise returns the positive offset set by the most recent
-    /// `DredDecoderHandle::parse_into` call — the maximum valid
-    /// `offset_samples` value for `DecoderHandle::reconstruct_from_dred`.
-    pub fn samples_available(&self) -> i32 {
-        self.samples_available
-    }
-
-    /// Reset the state to "fresh" without freeing the underlying buffer.
-    /// The next `parse_into` will overwrite the contents.
-    pub fn reset(&mut self) {
-        self.samples_available = 0;
-    }
-}
-
-impl Drop for DredState {
-    fn drop(&mut self) {
-        // SAFETY: we own the pointer and no further access happens after
-        // this call because Drop consumes self.
-        unsafe { opus_dred_free(self.inner.as_ptr()) };
-    }
-}
-
-// SAFETY: same reasoning as DecoderHandle.
-unsafe impl Send for DredState {}
-unsafe impl Sync for DredState {}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn decoder_handle_creates_and_drops() {
-        let handle = DecoderHandle::new().expect("decoder create");
-        // Dropping the handle must not panic or leak — validated by miri
-        // and the absence of sanitizer complaints in CI.
-        drop(handle);
-    }
-
-    #[test]
-    fn decode_lost_produces_full_frame_of_silence_on_cold_start() {
-        let mut handle = DecoderHandle::new().unwrap();
-        // 20 ms @ 48 kHz mono.
-        let mut pcm = vec![0i16; 960];
-        let n = handle.decode_lost(&mut pcm).unwrap();
-        assert_eq!(n, 960);
-        // On a fresh decoder, PLC output is silence (no past audio to extend).
-        assert!(pcm.iter().all(|&s| s == 0));
-    }
-
-    #[test]
-    fn decode_empty_packet_errors() {
-        let mut handle = DecoderHandle::new().unwrap();
-        let mut pcm = vec![0i16; 960];
-        let err = handle.decode(&[], &mut pcm);
-        assert!(err.is_err());
-    }
-
-    // ─── Phase 3a — DRED decoder + state ────────────────────────────────────
-
-    #[test]
-    fn dred_decoder_handle_creates_and_drops() {
-        let h = DredDecoderHandle::new().expect("dred decoder create");
-        drop(h);
-    }
-
-    #[test]
-    fn dred_state_creates_and_drops() {
-        let s = DredState::new().expect("dred state alloc");
-        assert_eq!(s.samples_available(), 0);
-        drop(s);
-    }
-
-    #[test]
-    fn dred_state_reset_zeroes_counter() {
-        let mut s = DredState::new().unwrap();
-        s.samples_available = 480; // pretend a parse populated it
-        assert_eq!(s.samples_available(), 480);
-        s.reset();
-        assert_eq!(s.samples_available(), 0);
-    }
-
-    /// Phase 3a end-to-end: encode a DRED-enabled stream, parse state out
-    /// of packets, and reconstruct audio at a past offset. Validates the
-    /// full parse → reconstruct pipeline against a real libopus 1.5.2
-    /// encoder so we catch FFI-layer bugs early.
-    #[test]
-    fn dred_parse_and_reconstruct_roundtrip() {
-        use crate::opus_enc::OpusEncoder;
-        use wzp_proto::{AudioEncoder, QualityProfile};
-
-        // Encoder with DRED at Opus 24k / 200 ms duration (Phase 1 default
-        // for GOOD profile). The loss floor is 5% per Phase 1.
-        let mut enc = OpusEncoder::new(QualityProfile::GOOD).unwrap();
-
-        // Decode-side handles.
-        let mut dec = DecoderHandle::new().unwrap();
-        let mut dred_dec = DredDecoderHandle::new().unwrap();
-        let mut state = DredState::new().unwrap();
-
-        // Generate 60 frames (1.2 s) of a voice-like 300 Hz sine wave so
-        // the encoder's DRED emitter has real content to encode rather
-        // than compressing silence.
-        let frame_len = 960usize; // 20 ms @ 48 kHz
-        let make_frame = |offset: usize| -> Vec<i16> {
-            (0..frame_len)
-                .map(|i| {
-                    let t = (offset + i) as f64 / 48_000.0;
-                    (8000.0 * (2.0 * std::f64::consts::PI * 300.0 * t).sin()) as i16
-                })
-                .collect()
-        };
-
-        // Track the freshest packet that carried non-zero DRED state.
-        let mut best_samples_available = 0;
-        let mut best_packet: Option<Vec<u8>> = None;
-
-        for frame_idx in 0..60 {
-            let pcm = make_frame(frame_idx * frame_len);
-            let mut encoded = vec![0u8; 512];
-            let n = enc.encode(&pcm, &mut encoded).unwrap();
-            encoded.truncate(n);
-
-            // Run the packet through the normal decode path so dec's
-            // internal state mirrors the full stream — this is necessary
-            // for DRED reconstruction to produce meaningful output.
-            let mut decoded = vec![0i16; frame_len];
-            dec.decode(&encoded, &mut decoded).unwrap();
-
-            // Parse DRED state out of the same packet. Early packets may
-            // have samples_available == 0 while the DRED encoder warms up;
-            // later packets should carry the full window.
-            match dred_dec.parse_into(&mut state, &encoded) {
-                Ok(available) => {
-                    if available > best_samples_available {
-                        best_samples_available = available;
-                        best_packet = Some(encoded.clone());
-                    }
-                }
-                Err(e) => panic!("parse_into errored unexpectedly: {e:?}"),
-            }
-        }
-
-        // By the time we're 60 frames in, DRED should have emitted data.
-        assert!(
-            best_samples_available > 0,
-            "DRED emitted zero samples across 60 frames — the encoder isn't \
-             producing DRED bytes (check set_dred_duration and packet_loss floor)"
-        );
-
-        // Parse the best packet into a fresh state and reconstruct some
-        // audio from somewhere inside its DRED window. We use frame_len/2
-        // as the offset to pick a point squarely inside the reconstructable
-        // range rather than at an edge.
-        let packet = best_packet.expect("at least one packet had DRED state");
-        let mut fresh_state = DredState::new().unwrap();
-        let available = dred_dec.parse_into(&mut fresh_state, &packet).unwrap();
-        assert!(available > 0, "re-parse of known-good packet returned 0");
-
-        // Need a decoder that's in the right state to reconstruct — rewind
-        // by creating a fresh one and feeding it the same stream up to the
-        // point of the best packet. Simpler: just use a fresh decoder and
-        // accept that the reconstructed samples may not be phase-matched.
-        // The test here only asserts *non-silent energy*, not signal fidelity.
-        let mut recon_dec = DecoderHandle::new().unwrap();
-        // Warm up the decoder with one frame so its internal state is valid.
-        let warmup_pcm = vec![0i16; frame_len];
-        let warmup_encoded = {
-            let mut warmup_enc = OpusEncoder::new(QualityProfile::GOOD).unwrap();
-            let mut buf = vec![0u8; 512];
-            let n = warmup_enc.encode(&warmup_pcm, &mut buf).unwrap();
-            buf.truncate(n);
-            buf
-        };
-        let mut throwaway = vec![0i16; frame_len];
-        let _ = recon_dec.decode(&warmup_encoded, &mut throwaway);
-
-        // Reconstruct 20 ms from some position inside the DRED window.
-        let offset = (available / 2).max(480).min(available);
-        let mut recon_pcm = vec![0i16; frame_len];
-        let n = recon_dec
-            .reconstruct_from_dred(&fresh_state, offset, &mut recon_pcm)
-            .expect("reconstruct_from_dred failed");
-        assert_eq!(n, frame_len);
-
-        // Energy check: reconstructed audio should not be all zeros. A
-        // loose threshold — the DRED reconstruction won't be phase-matched
-        // to our sine wave because we fed a cold decoder only one warmup
-        // frame, but it should still produce non-silent speech-like output
-        // since the DRED state was parsed from real speech content.
-        let energy: u64 = recon_pcm.iter().map(|&s| (s as i32).unsigned_abs() as u64).sum();
-        assert!(
-            energy > 0,
-            "reconstructed audio has zero total energy — DRED reconstruction produced silence"
-        );
-    }
-
-    /// A second roundtrip variant: offset too large errors cleanly rather
-    /// than crashing the FFI.
-    #[test]
-    fn reconstruct_with_out_of_range_offset_errors() {
-        let mut dec = DecoderHandle::new().unwrap();
-        let state = DredState::new().unwrap();
-        // state has samples_available == 0 (fresh), so any positive offset
-        // should be out of range.
-        let mut out = vec![0i16; 960];
-        let err = dec.reconstruct_from_dred(&state, 480, &mut out);
-        assert!(err.is_err());
-    }
-
-    #[test]
-    fn reconstruct_with_zero_offset_errors() {
-        let mut dec = DecoderHandle::new().unwrap();
-        let state = DredState::new().unwrap();
-        let mut out = vec![0i16; 960];
-        let err = dec.reconstruct_from_dred(&state, 0, &mut out);
-        assert!(err.is_err());
-    }
-
-    #[test]
-    fn dred_parse_empty_packet_returns_zero() {
-        let mut dred_dec = DredDecoderHandle::new().unwrap();
-        let mut state = DredState::new().unwrap();
-        let result = dred_dec.parse_into(&mut state, &[]).unwrap();
-        assert_eq!(result, 0);
-        assert_eq!(state.samples_available(), 0);
-    }
-}

crates/wzp-codec/src/lib.rs

@@ -15,7 +15,6 @@ pub mod agc;
 pub mod codec2_dec;
 pub mod codec2_enc;
 pub mod denoise;
-pub mod dred_ffi;
 pub mod opus_dec;
 pub mod opus_enc;
 pub mod resample;
@@ -28,26 +27,6 @@ pub use denoise::NoiseSupressor;
 pub use silence::{ComfortNoise, SilenceDetector};
 pub use wzp_proto::{AudioDecoder, AudioEncoder, CodecId, QualityProfile};
 
-use std::sync::atomic::{AtomicBool, Ordering};
-
-/// Global verbose-logging flag for DRED. Off by default — when enabled
-/// (via the GUI debug toggle wired through Tauri), the encoder logs its
-/// DRED config + libopus version, and the recv path logs every DRED
-/// reconstruction, classical PLC fill, and parse heartbeat. Off in
-/// "normal" mode keeps logcat clean.
-static DRED_VERBOSE_LOGS: AtomicBool = AtomicBool::new(false);
-
-/// Returns whether DRED verbose logging is currently enabled.
-#[inline]
-pub fn dred_verbose_logs() -> bool {
-    DRED_VERBOSE_LOGS.load(Ordering::Relaxed)
-}
-
-/// Enable/disable DRED verbose logging at runtime.
-pub fn set_dred_verbose_logs(enabled: bool) {
-    DRED_VERBOSE_LOGS.store(enabled, Ordering::Relaxed);
-}
-
 /// Create an adaptive encoder starting at the given quality profile.
 ///
 /// The returned encoder accepts 48 kHz mono PCM regardless of the active

crates/wzp-codec/src/opus_dec.rs

@@ -1,32 +1,30 @@
-//! Opus decoder built on top of the raw opusic-sys `DecoderHandle`.
+//! Opus decoder wrapping the `audiopus` crate.
-//!
-//! Phase 0 of the DRED integration: we went straight to a custom
-//! `DecoderHandle` instead of `opusic_c::Decoder` because the latter's
-//! inner pointer is `pub(crate)` and we need to reach it in Phase 3 for
-//! `opus_decoder_dred_decode`. See `dred_ffi.rs` for the rationale and
-//! `docs/PRD-dred-integration.md` for the full plan.
 
-use crate::dred_ffi::{DecoderHandle, DredState};
+use audiopus::coder::Decoder;
+use audiopus::{Channels, MutSignals, SampleRate};
+use audiopus::packet::Packet;
 use wzp_proto::{AudioDecoder, CodecError, CodecId, QualityProfile};
 
-/// Opus decoder implementing [`AudioDecoder`].
+/// Opus decoder implementing `AudioDecoder`.
 ///
-/// Operates at 48 kHz mono output. 20 ms and 40 ms frames supported via
+/// Operates at 48 kHz mono output.
-/// the active `QualityProfile`. Behavior is intentionally identical to
-/// the pre-swap audiopus-based decoder at this phase — DRED reconstruction
-/// lands in Phase 3.
 pub struct OpusDecoder {
-    inner: DecoderHandle,
+    inner: Decoder,
     codec_id: CodecId,
     frame_duration_ms: u8,
 }
 
+// SAFETY: Same reasoning as OpusEncoder — exclusive access via &mut self.
+unsafe impl Sync for OpusDecoder {}
+
 impl OpusDecoder {
     /// Create a new Opus decoder for the given quality profile.
     pub fn new(profile: QualityProfile) -> Result<Self, CodecError> {
-        let inner = DecoderHandle::new()?;
+        let decoder = Decoder::new(SampleRate::Hz48000, Channels::Mono)
+            .map_err(|e| CodecError::DecodeFailed(format!("opus decoder init: {e}")))?;
+
         Ok(Self {
-            inner,
+            inner: decoder,
             codec_id: profile.codec,
             frame_duration_ms: profile.frame_duration_ms,
         })
@@ -36,24 +34,6 @@ impl OpusDecoder {
     pub fn frame_samples(&self) -> usize {
         (48_000 * self.frame_duration_ms as usize) / 1000
     }
-
-    /// Reconstruct a lost frame from a previously parsed `DredState`.
-    ///
-    /// Phase 3b entry point: callers (CallDecoder / engine.rs) use this to
-    /// synthesize audio for gaps detected by the jitter buffer when DRED
-    /// side-channel state from a later-arriving packet covers the gap's
-    /// sample offset. `offset_samples` is measured backward from the anchor
-    /// packet that produced `state`. See `DecoderHandle::reconstruct_from_dred`
-    /// for the full semantics.
-    pub fn reconstruct_from_dred(
-        &mut self,
-        state: &DredState,
-        offset_samples: i32,
-        output: &mut [i16],
-    ) -> Result<usize, CodecError> {
-        self.inner
-            .reconstruct_from_dred(state, offset_samples, output)
-    }
 }
 
 impl AudioDecoder for OpusDecoder {
@@ -65,7 +45,15 @@ impl AudioDecoder for OpusDecoder {
                 pcm.len()
             )));
         }
-        self.inner.decode(encoded, pcm)
+        let packet = Packet::try_from(encoded)
+            .map_err(|e| CodecError::DecodeFailed(format!("invalid packet: {e}")))?;
+        let signals = MutSignals::try_from(pcm)
+            .map_err(|e| CodecError::DecodeFailed(format!("output signals: {e}")))?;
+        let n = self
+            .inner
+            .decode(Some(packet), signals, false)
+            .map_err(|e| CodecError::DecodeFailed(format!("opus decode: {e}")))?;
+        Ok(n)
     }
 
     fn decode_lost(&mut self, pcm: &mut [i16]) -> Result<usize, CodecError> {
@@ -76,7 +64,13 @@ impl AudioDecoder for OpusDecoder {
                 pcm.len()
             )));
         }
-        self.inner.decode_lost(pcm)
+        let signals = MutSignals::try_from(pcm)
+            .map_err(|e| CodecError::DecodeFailed(format!("output signals: {e}")))?;
+        let n = self
+            .inner
+            .decode(None, signals, false)
+            .map_err(|e| CodecError::DecodeFailed(format!("opus PLC: {e}")))?;
+        Ok(n)
     }
 
     fn codec_id(&self) -> CodecId {
@@ -85,7 +79,7 @@ impl AudioDecoder for OpusDecoder {
 
     fn set_profile(&mut self, profile: QualityProfile) -> Result<(), CodecError> {
         match profile.codec {
-            c if c.is_opus() => {
+            CodecId::Opus24k | CodecId::Opus16k | CodecId::Opus6k => {
                 self.codec_id = profile.codec;
                 self.frame_duration_ms = profile.frame_duration_ms;
                 Ok(())

crates/wzp-codec/src/opus_enc.rs

@@ -1,220 +1,58 @@
-//! Opus encoder wrapping the `opusic-c` crate (libopus 1.5.2).
+//! Opus encoder wrapping the `audiopus` crate.
-//!
-//! Phase 1 of the DRED integration: encoder-side DRED is enabled on every
-//! Opus profile with a tiered duration (studio 100 ms / normal 200 ms /
-//! degraded 500 ms), and Opus inband FEC (LBRR) is disabled because DRED
-//! is the stronger mechanism for the same failure mode. The legacy behavior
-//! is preserved behind the `AUDIO_USE_LEGACY_FEC` environment variable as a
-//! runtime escape hatch for rollout. See `docs/PRD-dred-integration.md`.
-//!
-//! # DRED duration policy
-//!
-//! Rationale from the PRD:
-//! - Studio tiers (Opus 32k/48k/64k): 100 ms — loss is rare on high-quality
-//!   networks; short window keeps decoder CPU modest.
-//! - Normal tiers (Opus 16k/24k): 200 ms — balanced baseline covering common
-//!   VoIP loss patterns (20–150 ms bursts from wifi roam, transient congestion).
-//! - Degraded tier (Opus 6k): 500 ms — users on 6k are by definition on a
-//!   bad link; longer DRED buys maximum burst resilience where it matters.
-//!
-//! # Why the 15% packet loss floor
-//!
-//! libopus 1.5's DRED emitter is gated on `OPUS_SET_PACKET_LOSS_PERC` and
-//! scales the emitted window proportionally to the assumed loss:
-//!
-//! ```text
-//!   loss_pct  samples_available    effective_ms
-//!   5%         720                   15
-//!   10%        2640                  55
-//!   15%        4560                  95
-//!   20%        6480                 135
-//!   25%+       8400 (capped)        175  (≈ 87% of the 200ms configured max)
-//! ```
-//!
-//! Measured empirically against libopus 1.5.2 on Opus 24k / 200 ms DRED
-//! duration during Phase 3b. At 5% loss the window is only 15 ms — too
-//! small to even reconstruct a single 20 ms Opus frame. 15% gives 95 ms
-//! (enough for single-frame recovery plus modest burst margin) while
-//! keeping the bitrate overhead modest compared to 25%. Real measurements
-//! from the quality adapter override upward when loss exceeds the floor.
 
-use std::sync::OnceLock;
+use audiopus::coder::Encoder;
-
+use audiopus::{Application, Bitrate, Channels, SampleRate, Signal};
-use opusic_c::{Application, Bitrate, Channels, Encoder, InbandFec, SampleRate, Signal};
+use tracing::debug;
-use tracing::{debug, info, warn};
 use wzp_proto::{AudioEncoder, CodecError, CodecId, QualityProfile};
 
-/// Logged exactly once per process the first time an OpusEncoder is built.
-/// Confirms that libopus 1.5.2 (the version with DRED) is actually linked
-/// at runtime — invaluable when chasing "is the new codec loaded?"
-/// regressions on Android, where the only debug surface is logcat.
-static LIBOPUS_VERSION_LOGGED: OnceLock<()> = OnceLock::new();
-
-/// Minimum `OPUS_SET_PACKET_LOSS_PERC` value used in DRED mode. libopus
-/// scales the DRED emission window with the assumed loss percentage:
-/// empirically, 5% gives a 15 ms window (useless), 10% gives 55 ms, 15%
-/// gives 95 ms, and 25%+ saturates the configured max (~175 ms at 200 ms
-/// duration). 15% is the minimum value that produces a DRED window larger
-/// than a single 20 ms frame, making it the minimum floor that actually
-/// gives DRED something useful to reconstruct. Real loss measurements from
-/// the quality adapter override this upward.
-const DRED_LOSS_FLOOR_PCT: u8 = 15;
-
-/// Environment variable that reverts Phase 1 behavior to Phase 0 (inband FEC
-/// on, DRED off, no loss floor). Read once per encoder construction.
-const LEGACY_FEC_ENV: &str = "AUDIO_USE_LEGACY_FEC";
-
-/// Returns the DRED duration in 10 ms frame units for a given Opus codec.
-///
-/// Unit: each frame is 10 ms, so the max value of 104 corresponds to 1040 ms
-/// of reconstructable history. Returns 0 for non-Opus codecs (DRED is not
-/// emitted by the libopus encoder in that case anyway, but we avoid a
-/// pointless FFI call).
-///
-/// See the DRED duration policy in the module docs for per-tier rationale.
-pub fn dred_duration_for(codec: CodecId) -> u8 {
-    match codec {
-        // Studio tiers — loss is rare, short window.
-        CodecId::Opus32k | CodecId::Opus48k | CodecId::Opus64k => 10,
-        // Normal tiers — balanced baseline.
-        CodecId::Opus16k | CodecId::Opus24k => 20,
-        // Degraded tier — maximum burst resilience.
-        CodecId::Opus6k => 50,
-        // Non-Opus (Codec2 / CN): DRED is N/A.
-        CodecId::Codec2_1200 | CodecId::Codec2_3200 | CodecId::ComfortNoise => 0,
-    }
-}
-
-/// Returns whether the legacy-FEC escape hatch is active.
-///
-/// Read from `AUDIO_USE_LEGACY_FEC`. Any non-empty value activates legacy
-/// mode; unset or empty leaves DRED enabled.
-fn read_legacy_fec_env() -> bool {
-    match std::env::var(LEGACY_FEC_ENV) {
-        Ok(v) => !v.is_empty() && v != "0" && v.to_ascii_lowercase() != "false",
-        Err(_) => false,
-    }
-}
-
 /// Opus encoder implementing `AudioEncoder`.
 ///
-/// Operates at 48 kHz mono. Supports 20 ms and 40 ms frames via the active
+/// Operates at 48 kHz mono. Supports frame sizes of 20 ms (960 samples)
-/// `QualityProfile`.
+/// and 40 ms (1920 samples).
 pub struct OpusEncoder {
     inner: Encoder,
     codec_id: CodecId,
     frame_duration_ms: u8,
-    /// When `true`, revert to the Phase 0 behavior: inband FEC Mode1, DRED
-    /// disabled, no loss floor. Captured at construction time and not
-    /// re-read mid-call.
-    legacy_fec_mode: bool,
 }
 
 // SAFETY: OpusEncoder is only used via `&mut self` methods. The inner
-// opusic-c Encoder wraps a non-null pointer that is !Sync by default,
+// audiopus Encoder contains a raw pointer that is !Sync, but we never
-// but we never share it across threads without exclusive access.
+// share it across threads without exclusive access.
 unsafe impl Sync for OpusEncoder {}
 
 impl OpusEncoder {
     /// Create a new Opus encoder for the given quality profile.
     pub fn new(profile: QualityProfile) -> Result<Self, CodecError> {
-        // opusic-c argument order: (Channels, SampleRate, Application)
+        let encoder = Encoder::new(SampleRate::Hz48000, Channels::Mono, Application::Voip)
-        // — different from audiopus's (SampleRate, Channels, Application).
+            .map_err(|e| CodecError::EncodeFailed(format!("opus encoder init: {e}")))?;
-        let encoder = Encoder::new(Channels::Mono, SampleRate::Hz48000, Application::Voip)
-            .map_err(|e| CodecError::EncodeFailed(format!("opus encoder init: {e:?}")))?;
-
-        let legacy_fec_mode = read_legacy_fec_env();
-        if legacy_fec_mode {
-            warn!(
-                "AUDIO_USE_LEGACY_FEC active — reverting Opus encoder to Phase 0 \
-                 behavior (inband FEC Mode1, no DRED)"
-            );
-        }
 
         let mut enc = Self {
             inner: encoder,
             codec_id: profile.codec,
             frame_duration_ms: profile.frame_duration_ms,
-            legacy_fec_mode,
         };
-
-        // Common setup — bitrate, DTX, signal hint, complexity. These are
-        // identical regardless of the protection mode below.
         enc.apply_bitrate(profile.codec)?;
+        enc.set_inband_fec(true);
         enc.set_dtx(true);
+
+        // Voice signal type hint for better compression
         enc.inner
             .set_signal(Signal::Voice)
-            .map_err(|e| CodecError::EncodeFailed(format!("set signal: {e:?}")))?;
+            .map_err(|e| CodecError::EncodeFailed(format!("set signal: {e}")))?;
+
+        // Default complexity 7 — good quality/CPU trade-off for VoIP
         enc.inner
             .set_complexity(7)
-            .map_err(|e| CodecError::EncodeFailed(format!("set complexity: {e:?}")))?;
+            .map_err(|e| CodecError::EncodeFailed(format!("set complexity: {e}")))?;
-
-        // Protection mode: DRED (Phase 1 default) or legacy inband FEC.
-        enc.apply_protection_mode(profile.codec)?;
 
         Ok(enc)
     }
 
-    /// Configure the protection mode for the active codec.
-    ///
-    /// In DRED mode (default): disable inband FEC, set DRED duration for the
-    /// codec tier, clamp packet_loss to the 5% floor so DRED stays active.
-    ///
-    /// In legacy mode: enable inband FEC Mode1 (Phase 0 behavior), leave
-    /// DRED and packet_loss at libopus defaults.
-    fn apply_protection_mode(&mut self, codec: CodecId) -> Result<(), CodecError> {
-        if self.legacy_fec_mode {
-            self.inner
-                .set_inband_fec(InbandFec::Mode1)
-                .map_err(|e| CodecError::EncodeFailed(format!("set inband FEC: {e:?}")))?;
-            // Leave DRED at 0 and packet_loss at default — matches Phase 0.
-            return Ok(());
-        }
-
-        // DRED path: disable the overlapping inband FEC, enable DRED with
-        // per-profile duration, floor packet_loss so DRED emits.
-        self.inner
-            .set_inband_fec(InbandFec::Off)
-            .map_err(|e| CodecError::EncodeFailed(format!("set inband FEC off: {e:?}")))?;
-
-        let dred_frames = dred_duration_for(codec);
-        self.inner
-            .set_dred_duration(dred_frames)
-            .map_err(|e| CodecError::EncodeFailed(format!("set DRED duration: {e:?}")))?;
-
-        self.inner
-            .set_packet_loss(DRED_LOSS_FLOOR_PCT)
-            .map_err(|e| CodecError::EncodeFailed(format!("set packet loss floor: {e:?}")))?;
-
-        // Both of these are gated behind the GUI debug toggle so logcat
-        // stays clean in normal mode. Flip "DRED verbose logs" in the
-        // settings panel to see the per-encoder config + libopus version.
-        if crate::dred_verbose_logs() {
-            info!(
-                codec = ?codec,
-                dred_frames,
-                dred_ms = dred_frames as u32 * 10,
-                loss_floor_pct = DRED_LOSS_FLOOR_PCT,
-                "opus encoder: DRED enabled"
-            );
-
-            // One-shot logging of the linked libopus version so we can
-            // confirm at a glance that opusic-c (libopus 1.5.2) is loaded.
-            // Pre-Phase-0 audiopus shipped libopus 1.3 which has no DRED;
-            // if this log says "libopus 1.3" something is very wrong.
-            LIBOPUS_VERSION_LOGGED.get_or_init(|| {
-                info!(libopus_version = %opusic_c::version(), "linked libopus version");
-            });
-        }
-
-        Ok(())
-    }
-
     fn apply_bitrate(&mut self, codec: CodecId) -> Result<(), CodecError> {
-        let bps = codec.bitrate_bps();
+        let bps = codec.bitrate_bps() as i32;
         self.inner
-            .set_bitrate(Bitrate::Value(bps))
+            .set_bitrate(Bitrate::BitsPerSecond(bps))
-            .map_err(|e| CodecError::EncodeFailed(format!("set bitrate: {e:?}")))?;
+            .map_err(|e| CodecError::EncodeFailed(format!("set bitrate: {e}")))?;
         debug!(bitrate_bps = bps, "opus encoder bitrate set");
         Ok(())
     }
@@ -233,36 +71,10 @@ impl OpusEncoder {
 
     /// Hint the encoder about expected packet loss percentage (0-100).
     ///
-    /// In DRED mode, the value is floored at `DRED_LOSS_FLOOR_PCT` so the
+    /// Higher values cause the encoder to use more redundancy to survive
-    /// encoder never drops DRED emission even on a perfect network. Real
+    /// packet loss, at the expense of slightly higher bitrate.
-    /// loss measurements from the quality adapter override upward.
-    ///
-    /// In legacy mode, the value is passed through unchanged (min 0, max 100).
     pub fn set_expected_loss(&mut self, loss_pct: u8) {
-        let clamped = if self.legacy_fec_mode {
+        let _ = self.inner.set_packet_loss_perc(loss_pct.min(100));
-            loss_pct.min(100)
-        } else {
-            loss_pct.max(DRED_LOSS_FLOOR_PCT).min(100)
-        };
-        let _ = self.inner.set_packet_loss(clamped);
-    }
-
-    /// Set the DRED duration in 10 ms frame units (0 disables, max 104).
-    ///
-    /// No-op in legacy mode. Normally driven automatically by the active
-    /// quality profile via `apply_protection_mode`; this setter exists for
-    /// tests and for the rare case where a caller needs to override the
-    /// per-profile default.
-    pub fn set_dred_duration(&mut self, frames: u8) {
-        if self.legacy_fec_mode {
-            return;
-        }
-        let _ = self.inner.set_dred_duration(frames.min(104));
-    }
-
-    /// Test/introspection accessor: whether legacy FEC mode is active.
-    pub fn is_legacy_fec_mode(&self) -> bool {
-        self.legacy_fec_mode
     }
 }
 
@@ -275,14 +87,10 @@ impl AudioEncoder for OpusEncoder {
                 pcm.len()
             )));
         }
-        // opusic-c takes &[u16] for the sample input. Bit pattern is
-        // identical to i16 — the cast is zero-cost and the encoder
-        // interprets the bytes the same way as libopus internally.
-        let pcm_u16: &[u16] = bytemuck::cast_slice(pcm);
         let n = self
             .inner
-            .encode_to_slice(pcm_u16, out)
+            .encode(pcm, out)
-            .map_err(|e| CodecError::EncodeFailed(format!("opus encode: {e:?}")))?;
+            .map_err(|e| CodecError::EncodeFailed(format!("opus encode: {e}")))?;
         Ok(n)
     }
 
@@ -292,13 +100,10 @@ impl AudioEncoder for OpusEncoder {
 
     fn set_profile(&mut self, profile: QualityProfile) -> Result<(), CodecError> {
         match profile.codec {
-            c if c.is_opus() => {
+            CodecId::Opus24k | CodecId::Opus16k | CodecId::Opus6k => {
                 self.codec_id = profile.codec;
                 self.frame_duration_ms = profile.frame_duration_ms;
                 self.apply_bitrate(profile.codec)?;
-                // Refresh DRED duration for the new tier. apply_protection_mode
-                // is idempotent and handles the legacy-vs-DRED branch correctly.
-                self.apply_protection_mode(profile.codec)?;
                 Ok(())
             }
             other => Err(CodecError::UnsupportedTransition {
@@ -315,190 +120,10 @@ impl AudioEncoder for OpusEncoder {
     }
 
     fn set_inband_fec(&mut self, enabled: bool) {
-        // In DRED mode, ignore external requests to re-enable inband FEC —
+        let _ = self.inner.set_inband_fec(enabled);
-        // running both mechanisms wastes bitrate on overlapping protection
-        // and opusic-c's own docs recommend disabling inband FEC when DRED
-        // is on. Trait callers that genuinely want classical FEC should set
-        // `AUDIO_USE_LEGACY_FEC=1` and re-create the encoder.
-        if !self.legacy_fec_mode {
-            debug!(
-                enabled,
-                "set_inband_fec ignored: DRED mode is active (set AUDIO_USE_LEGACY_FEC to revert)"
-            );
-            return;
-        }
-        let mode = if enabled { InbandFec::Mode1 } else { InbandFec::Off };
-        let _ = self.inner.set_inband_fec(mode);
     }
 
     fn set_dtx(&mut self, enabled: bool) {
         let _ = self.inner.set_dtx(enabled);
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use wzp_proto::AudioDecoder;
-
-    /// Phase 0 acceptance gate: fail loudly if the linked libopus is not 1.5.x.
-    /// DRED (Phase 1+) only exists in libopus ≥ 1.5, so running against an
-    /// older version would silently regress the entire DRED integration.
-    #[test]
-    fn linked_libopus_is_1_5() {
-        let version = opusic_c::version();
-        assert!(
-            version.contains("1.5"),
-            "expected libopus 1.5.x, got: {version}"
-        );
-    }
-
-    #[test]
-    fn encoder_creates_at_good_profile() {
-        let enc = OpusEncoder::new(QualityProfile::GOOD).expect("opus encoder init");
-        assert_eq!(enc.codec_id, CodecId::Opus24k);
-        assert_eq!(enc.frame_samples(), 960); // 20 ms @ 48 kHz
-    }
-
-    #[test]
-    fn encoder_roundtrip_silence() {
-        let mut enc = OpusEncoder::new(QualityProfile::GOOD).unwrap();
-        let mut dec = crate::opus_dec::OpusDecoder::new(QualityProfile::GOOD).unwrap();
-        let pcm_in = vec![0i16; 960]; // 20 ms silence
-        let mut encoded = vec![0u8; 512];
-        let n = enc.encode(&pcm_in, &mut encoded).unwrap();
-        assert!(n > 0);
-        let mut pcm_out = vec![0i16; 960];
-        let samples = dec.decode(&encoded[..n], &mut pcm_out).unwrap();
-        assert_eq!(samples, 960);
-    }
-
-    // ─── Phase 1 — DRED duration policy ─────────────────────────────────────
-
-    #[test]
-    fn dred_duration_for_studio_tiers_is_100ms() {
-        assert_eq!(dred_duration_for(CodecId::Opus32k), 10);
-        assert_eq!(dred_duration_for(CodecId::Opus48k), 10);
-        assert_eq!(dred_duration_for(CodecId::Opus64k), 10);
-    }
-
-    #[test]
-    fn dred_duration_for_normal_tiers_is_200ms() {
-        assert_eq!(dred_duration_for(CodecId::Opus16k), 20);
-        assert_eq!(dred_duration_for(CodecId::Opus24k), 20);
-    }
-
-    #[test]
-    fn dred_duration_for_degraded_tier_is_500ms() {
-        assert_eq!(dred_duration_for(CodecId::Opus6k), 50);
-    }
-
-    #[test]
-    fn dred_duration_for_codec2_is_zero() {
-        assert_eq!(dred_duration_for(CodecId::Codec2_3200), 0);
-        assert_eq!(dred_duration_for(CodecId::Codec2_1200), 0);
-        assert_eq!(dred_duration_for(CodecId::ComfortNoise), 0);
-    }
-
-    // ─── Phase 1 — Legacy escape hatch ──────────────────────────────────────
-
-    /// By default (env var unset), legacy mode is off.
-    ///
-    /// This test does NOT manipulate the environment to avoid flakiness
-    /// when the full suite runs in parallel. It only asserts on a freshly
-    /// created encoder in the ambient environment.
-    #[test]
-    fn default_mode_is_dred_not_legacy() {
-        // SAFETY: only run if the ambient env hasn't set the var externally.
-        if std::env::var(LEGACY_FEC_ENV).is_ok() {
-            return; // don't assert — someone set the env for a reason.
-        }
-        let enc = OpusEncoder::new(QualityProfile::GOOD).unwrap();
-        assert!(!enc.is_legacy_fec_mode());
-    }
-
-    // ─── Phase 1 — Behavioral regression: roundtrip still works ─────────────
-
-    #[test]
-    fn dred_mode_roundtrip_voice_pattern() {
-        // Use a realistic voice-like input (sine wave at speech frequencies)
-        // so the encoder emits meaningful DRED data rather than trivially
-        // compressible silence.
-        let mut enc = OpusEncoder::new(QualityProfile::GOOD).unwrap();
-        let mut dec = crate::opus_dec::OpusDecoder::new(QualityProfile::GOOD).unwrap();
-
-        let mut total_encoded_bytes = 0usize;
-        // Run 50 frames (1 second) so DRED fills up and starts emitting.
-        for frame_idx in 0..50 {
-            let pcm_in: Vec<i16> = (0..960)
-                .map(|i| {
-                    let t = (frame_idx * 960 + i) as f64 / 48_000.0;
-                    (8000.0 * (2.0 * std::f64::consts::PI * 300.0 * t).sin()) as i16
-                })
-                .collect();
-            let mut encoded = vec![0u8; 512];
-            let n = enc.encode(&pcm_in, &mut encoded).unwrap();
-            assert!(n > 0);
-            total_encoded_bytes += n;
-
-            let mut pcm_out = vec![0i16; 960];
-            let samples = dec.decode(&encoded[..n], &mut pcm_out).unwrap();
-            assert_eq!(samples, 960);
-        }
-
-        // Effective bitrate after 1 second of encoding.
-        // Opus 24k base + ~1 kbps DRED ≈ 25 kbps ≈ 3125 bytes/sec.
-        // Allow generous headroom (2000 lower bound, 8000 upper bound) —
-        // this is a behavioral regression check, not a tight bitrate assertion.
-        // The exact value is printed with --nocapture for diagnostic use.
-        eprintln!(
-            "[phase1 bitrate probe] legacy_fec_mode={} total_encoded={} bytes/sec",
-            enc.is_legacy_fec_mode(),
-            total_encoded_bytes
-        );
-        assert!(
-            total_encoded_bytes > 2000,
-            "encoder output too small: {total_encoded_bytes} bytes/sec (DRED likely not emitting)"
-        );
-        assert!(
-            total_encoded_bytes < 8000,
-            "encoder output too large: {total_encoded_bytes} bytes/sec"
-        );
-    }
-
-    // ─── Phase 1 — set_profile updates DRED duration on tier switch ─────────
-
-    #[test]
-    fn profile_switch_refreshes_dred_duration() {
-        // Start on GOOD (Opus 24k, DRED 20 frames), switch to DEGRADED
-        // (Opus 6k, DRED 50 frames). The encoder should accept both profile
-        // changes without error. We can't directly observe the DRED duration
-        // inside libopus, but apply_protection_mode returns Ok for both.
-        let mut enc = OpusEncoder::new(QualityProfile::GOOD).unwrap();
-        assert_eq!(enc.codec_id, CodecId::Opus24k);
-
-        enc.set_profile(QualityProfile::DEGRADED).unwrap();
-        assert_eq!(enc.codec_id, CodecId::Opus6k);
-
-        enc.set_profile(QualityProfile::STUDIO_64K).unwrap();
-        assert_eq!(enc.codec_id, CodecId::Opus64k);
-    }
-
-    // ─── Phase 1 — Trait set_inband_fec is a no-op in DRED mode ─────────────
-
-    #[test]
-    fn set_inband_fec_noop_in_dred_mode() {
-        if std::env::var(LEGACY_FEC_ENV).is_ok() {
-            return;
-        }
-        let mut enc = OpusEncoder::new(QualityProfile::GOOD).unwrap();
-        // Should not error, should not re-enable inband FEC internally.
-        enc.set_inband_fec(true);
-        // We can't directly query libopus's inband FEC state through opusic-c,
-        // but the call must not panic and the encoder must still work.
-        let pcm_in = vec![0i16; 960];
-        let mut encoded = vec![0u8; 512];
-        let n = enc.encode(&pcm_in, &mut encoded).unwrap();
-        assert!(n > 0);
-    }
-}

crates/wzp-crypto/src/handshake.rs

@@ -110,18 +110,7 @@ impl KeyExchange for WarzoneKeyExchange {
         hk.expand(b"warzone-session-key", &mut session_key)
             .expect("HKDF expand for session key should not fail");
 
-        // Derive SAS (Short Authentication String) from shared secret only.
+        Ok(Box::new(ChaChaSession::new(session_key)))
-        // The shared secret is identical on both sides (X25519 DH property).
-        // A MITM would produce a different shared secret → different SAS.
-        // We use a dedicated HKDF label so SAS is independent of the session key.
-        let mut sas_key = [0u8; 4];
-        hk.expand(b"warzone-sas-code", &mut sas_key)
-            .expect("HKDF expand for SAS should not fail");
-        let sas_code = u32::from_be_bytes(sas_key) % 10000;
-
-        let mut session = ChaChaSession::new(session_key);
-        session.set_sas(sas_code);
-        Ok(Box::new(session))
     }
 }
 
@@ -222,47 +211,4 @@ mod tests {
 
         assert_eq!(&decrypted, plaintext);
     }
-
-    #[test]
-    fn sas_codes_match_between_peers() {
-        let mut alice = WarzoneKeyExchange::from_identity_seed(&[0xAA; 32]);
-        let mut bob = WarzoneKeyExchange::from_identity_seed(&[0xBB; 32]);
-
-        let alice_eph_pub = alice.generate_ephemeral();
-        let bob_eph_pub = bob.generate_ephemeral();
-
-        let alice_session = alice.derive_session(&bob_eph_pub).unwrap();
-        let bob_session = bob.derive_session(&alice_eph_pub).unwrap();
-
-        let alice_sas = alice_session.sas_code();
-        let bob_sas = bob_session.sas_code();
-
-        assert!(alice_sas.is_some(), "Alice should have SAS");
-        assert!(bob_sas.is_some(), "Bob should have SAS");
-        assert_eq!(alice_sas, bob_sas, "SAS codes must match between peers");
-        assert!(alice_sas.unwrap() < 10000, "SAS should be 4 digits");
-    }
-
-    #[test]
-    fn sas_differs_for_different_peers() {
-        let mut alice = WarzoneKeyExchange::from_identity_seed(&[0xAA; 32]);
-        let mut bob = WarzoneKeyExchange::from_identity_seed(&[0xBB; 32]);
-        let mut eve = WarzoneKeyExchange::from_identity_seed(&[0xEE; 32]);
-
-        let alice_eph = alice.generate_ephemeral();
-        let bob_eph = bob.generate_ephemeral();
-        let eve_eph = eve.generate_ephemeral();
-
-        let alice_bob_session = alice.derive_session(&bob_eph).unwrap();
-
-        // Eve does separate handshake with Bob (MITM scenario)
-        let eve_bob_session = eve.derive_session(&bob_eph).unwrap();
-
-        // SAS codes should differ — Eve's session has different shared secret
-        assert_ne!(
-            alice_bob_session.sas_code(),
-            eve_bob_session.sas_code(),
-            "MITM session should produce different SAS"
-        );
-    }
 }

crates/wzp-crypto/src/session.rs

@@ -26,8 +26,6 @@ pub struct ChaChaSession {
     rekey_mgr: RekeyManager,
     /// Pending ephemeral secret for rekey (stored until peer responds).
     pending_rekey_secret: Option<StaticSecret>,
-    /// Short Authentication String (4-digit code for verbal verification).
-    sas_code: Option<u32>,
 }
 
 impl ChaChaSession {
@@ -48,15 +46,9 @@ impl ChaChaSession {
             recv_seq: 0,
             rekey_mgr: RekeyManager::new(shared_secret),
             pending_rekey_secret: None,
-            sas_code: None,
         }
     }
 
-    /// Set the SAS code (called by key exchange after derivation).
-    pub fn set_sas(&mut self, code: u32) {
-        self.sas_code = Some(code);
-    }
-
     /// Install a new key (after rekeying).
     fn install_key(&mut self, new_key: [u8; 32]) {
         use sha2::Digest;
@@ -144,10 +136,6 @@ impl CryptoSession for ChaChaSession {
 
         Ok(())
     }
-
-    fn sas_code(&self) -> Option<u32> {
-        self.sas_code
-    }
 }
 
 #[cfg(test)]

crates/wzp-crypto/tests/featherchat_compat.rs

@@ -273,7 +273,7 @@ fn auth_invalid_response_matches() {
 
 #[test]
 fn all_signal_types_map_correctly() {
-    use wzp_client::featherchat::signal_to_call_type;
+    use wzp_client::featherchat::{signal_to_call_type, CallSignalType};
 
     let cases: Vec<(wzp_proto::SignalMessage, &str)> = vec![
         (

crates/wzp-fec/src/decoder.rs

@@ -1,7 +1,6 @@
 //! RaptorQ FEC decoder — reassembles source blocks from received source and repair symbols.
 
 use std::collections::HashMap;
-use std::time::Instant;
 
 use raptorq::{EncodingPacket, ObjectTransmissionInformation, PayloadId, SourceBlockDecoder};
 use wzp_proto::error::FecError;
@@ -10,9 +9,6 @@ use wzp_proto::FecDecoder;
 /// Length prefix size (u16 little-endian), must match encoder.
 const LEN_PREFIX: usize = 2;
 
-/// Decoded blocks older than this are eligible for reuse by a new sender.
-const BLOCK_STALE_SECS: u64 = 2;
-
 /// State for one in-flight block being decoded.
 struct BlockState {
     /// Number of source symbols expected.
@@ -25,8 +21,6 @@ struct BlockState {
     decoded: bool,
     /// Cached decoded result.
     result: Option<Vec<Vec<u8>>>,
-    /// When this block was last decoded (for staleness check).
-    decoded_at: Option<Instant>,
 }
 
 /// RaptorQ-based FEC decoder that handles multiple concurrent blocks.
@@ -64,7 +58,6 @@ impl RaptorQFecDecoder {
             symbol_size: self.symbol_size,
             decoded: false,
             result: None,
-            decoded_at: None,
         })
     }
 }
@@ -81,21 +74,9 @@ impl FecDecoder for RaptorQFecDecoder {
         let block = self.get_or_create_block(block_id);
 
         if block.decoded {
-            // If the block was decoded recently, skip (normal duplicate).
+            // Already decoded, ignore additional symbols.
-            // If it's stale (>2s), a new sender is reusing this block_id — reset it.
-            if let Some(at) = block.decoded_at {
-                if at.elapsed().as_secs() >= BLOCK_STALE_SECS {
-                    block.decoded = false;
-                    block.result = None;
-                    block.decoded_at = None;
-                    block.packets.clear();
-                } else {
             return Ok(());
         }
-            } else {
-                return Ok(());
-            }
-        }
 
         // Data should already be at symbol_size (length-prefixed and padded by the encoder).
         // But if caller sends raw data, pad it.
@@ -151,7 +132,6 @@ impl FecDecoder for RaptorQFecDecoder {
 
                 let block = self.blocks.get_mut(&block_id).unwrap();
                 block.decoded = true;
-                block.decoded_at = Some(Instant::now());
                 block.result = Some(frames.clone());
                 Ok(Some(frames))
             }

crates/wzp-native/Cargo.toml

@@ -1,29 +0,0 @@
-[package]
-name = "wzp-native"
-version = "0.1.0"
-edition = "2024"
-description = "WarzonePhone native audio library — standalone Android cdylib that eventually owns all C++ (Oboe bridge) and exposes a pure-C FFI. Built with cargo-ndk, loaded at runtime by the Tauri desktop cdylib via libloading."
-
-# Crate-type is DELIBERATELY only cdylib (no rlib, no staticlib). This crate
-# is built with `cargo ndk -t arm64-v8a build --release -p wzp-native` as a
-# standalone .so, which is the same path the legacy wzp-android crate uses
-# successfully on the same phone / same NDK. Keeping the crate-type single
-# avoids the rust-lang/rust#104707 symbol leak that bit us when Tauri's
-# desktop crate had ["staticlib", "cdylib", "rlib"] and any C++ static
-# archive pulled bionic's internal pthread_create into the final .so.
-[lib]
-name = "wzp_native"
-crate-type = ["cdylib"]
-
-[build-dependencies]
-# cc is SAFE to use here because this crate is a single-cdylib: no
-# staticlib in crate-type → no rust-lang/rust#104707 symbol leak. The
-# legacy wzp-android crate uses the same setup and works.
-cc = "1"
-
-[dependencies]
-# Phase 2: Oboe C++ audio bridge. Still no Rust deps — we do the whole
-# audio pipeline via extern "C" into the bundled C++ and expose our own
-# narrow extern "C" API for wzp-desktop to dlopen via libloading.
-# Phase 3 can add wzp-proto/wzp-codec if we want to share codec logic
-# instead of calling back into wzp-desktop via callbacks.

crates/wzp-native/build.rs

@@ -1,119 +0,0 @@
-//! wzp-native build.rs — Oboe C++ bridge compile on Android.
-//!
-//! Near-verbatim copy of crates/wzp-android/build.rs (which is known to
-//! work). The crucial distinction: this crate is a single-cdylib (no
-//! staticlib, no rlib in crate-type) so rust-lang/rust#104707 doesn't
-//! apply — bionic's internal pthread_create / __init_tcb symbols stay
-//! UND and resolve against libc.so at runtime, as they should.
-//!
-//! On non-Android hosts we compile `cpp/oboe_stub.cpp` (empty stubs) so
-//! `cargo check --target <host>` still works for IDEs and CI.
-
-use std::path::PathBuf;
-
-fn main() {
-    let target = std::env::var("TARGET").unwrap_or_default();
-
-    if target.contains("android") {
-        // getauxval_fix: override compiler-rt's broken static getauxval
-        // stub that SIGSEGVs in shared libraries.
-        cc::Build::new()
-            .file("cpp/getauxval_fix.c")
-            .compile("wzp_native_getauxval_fix");
-
-        let oboe_dir = fetch_oboe();
-        match oboe_dir {
-            Some(oboe_path) => {
-                println!("cargo:warning=wzp-native: building with Oboe from {:?}", oboe_path);
-                let mut build = cc::Build::new();
-                build
-                    .cpp(true)
-                    .std("c++17")
-                    // Shared libc++ — matches legacy wzp-android setup.
-                    .cpp_link_stdlib(Some("c++_shared"))
-                    .include("cpp")
-                    .include(oboe_path.join("include"))
-                    .include(oboe_path.join("src"))
-                    .define("WZP_HAS_OBOE", None)
-                    .file("cpp/oboe_bridge.cpp");
-                add_cpp_files_recursive(&mut build, &oboe_path.join("src"));
-                build.compile("wzp_native_oboe_bridge");
-            }
-            None => {
-                println!("cargo:warning=wzp-native: Oboe not found, building stub");
-                cc::Build::new()
-                    .cpp(true)
-                    .std("c++17")
-                    .cpp_link_stdlib(Some("c++_shared"))
-                    .file("cpp/oboe_stub.cpp")
-                    .include("cpp")
-                    .compile("wzp_native_oboe_bridge");
-            }
-        }
-
-        // Oboe needs log + OpenSLES backends at runtime.
-        println!("cargo:rustc-link-lib=log");
-        println!("cargo:rustc-link-lib=OpenSLES");
-
-        // Re-run if any cpp file changes
-        println!("cargo:rerun-if-changed=cpp/oboe_bridge.cpp");
-        println!("cargo:rerun-if-changed=cpp/oboe_bridge.h");
-        println!("cargo:rerun-if-changed=cpp/oboe_stub.cpp");
-        println!("cargo:rerun-if-changed=cpp/getauxval_fix.c");
-    } else {
-        // Non-Android hosts: compile the empty stub so lib.rs's extern
-        // declarations resolve when someone runs `cargo check` on macOS
-        // or Linux without an NDK.
-        cc::Build::new()
-            .cpp(true)
-            .std("c++17")
-            .file("cpp/oboe_stub.cpp")
-            .include("cpp")
-            .compile("wzp_native_oboe_bridge");
-        println!("cargo:rerun-if-changed=cpp/oboe_stub.cpp");
-    }
-}
-
-/// Recursively add all `.cpp` files from a directory to a cc::Build.
-fn add_cpp_files_recursive(build: &mut cc::Build, dir: &std::path::Path) {
-    if !dir.is_dir() {
-        return;
-    }
-    for entry in std::fs::read_dir(dir).unwrap() {
-        let entry = entry.unwrap();
-        let path = entry.path();
-        if path.is_dir() {
-            add_cpp_files_recursive(build, &path);
-        } else if path.extension().map_or(false, |e| e == "cpp") {
-            build.file(&path);
-        }
-    }
-}
-
-/// Fetch or find Oboe headers + sources (v1.8.1). Same logic as the
-/// legacy wzp-android crate's build.rs.
-fn fetch_oboe() -> Option<PathBuf> {
-    let out_dir = PathBuf::from(std::env::var("OUT_DIR").unwrap());
-    let oboe_dir = out_dir.join("oboe");
-
-    if oboe_dir.join("include").join("oboe").join("Oboe.h").exists() {
-        return Some(oboe_dir);
-    }
-
-    let status = std::process::Command::new("git")
-        .args([
-            "clone",
-            "--depth=1",
-            "--branch=1.8.1",
-            "https://github.com/google/oboe.git",
-            oboe_dir.to_str().unwrap(),
-        ])
-        .status();
-
-    match status {
-        Ok(s) if s.success() && oboe_dir.join("include").join("oboe").join("Oboe.h").exists() => {
-            Some(oboe_dir)
-        }
-        _ => None,
-    }
-}

crates/wzp-native/cpp/getauxval_fix.c

@@ -1,21 +0,0 @@
-// Override the broken static getauxval from compiler-rt/CRT.
-// The static version reads from __libc_auxv which is NULL in shared libs
-// loaded via dlopen, causing SIGSEGV in init_have_lse_atomics at load time.
-// This version calls the real bionic getauxval via dlsym.
-#ifdef __ANDROID__
-#include <dlfcn.h>
-#include <stdint.h>
-
-typedef unsigned long (*getauxval_fn)(unsigned long);
-
-unsigned long getauxval(unsigned long type) {
-    static getauxval_fn real_getauxval = (getauxval_fn)0;
-    if (!real_getauxval) {
-        real_getauxval = (getauxval_fn)dlsym((void*)-1L /* RTLD_DEFAULT */, "getauxval");
-        if (!real_getauxval) {
-            return 0;
-        }
-    }
-    return real_getauxval(type);
-}
-#endif

crates/wzp-native/cpp/oboe_bridge.cpp

@@ -1,420 +0,0 @@
-// Full Oboe implementation for Android
-// This file is compiled only when targeting Android
-
-#include "oboe_bridge.h"
-
-#ifdef __ANDROID__
-#include <oboe/Oboe.h>
-#include <android/log.h>
-#include <cstring>
-#include <atomic>
-
-#define LOG_TAG "wzp-oboe"
-#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
-#define LOGW(...) __android_log_print(ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__)
-#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
-
-// ---------------------------------------------------------------------------
-// Ring buffer helpers (SPSC, lock-free)
-// ---------------------------------------------------------------------------
-
-static inline int32_t ring_available_read(const wzp_atomic_int* write_idx,
-                                           const wzp_atomic_int* read_idx,
-                                           int32_t capacity) {
-    int32_t w = std::atomic_load_explicit(write_idx, std::memory_order_acquire);
-    int32_t r = std::atomic_load_explicit(read_idx, std::memory_order_relaxed);
-    int32_t avail = w - r;
-    if (avail < 0) avail += capacity;
-    return avail;
-}
-
-static inline int32_t ring_available_write(const wzp_atomic_int* write_idx,
-                                            const wzp_atomic_int* read_idx,
-                                            int32_t capacity) {
-    return capacity - 1 - ring_available_read(write_idx, read_idx, capacity);
-}
-
-static inline void ring_write(int16_t* buf, int32_t capacity,
-                               wzp_atomic_int* write_idx, const wzp_atomic_int* read_idx,
-                               const int16_t* src, int32_t count) {
-    int32_t w = std::atomic_load_explicit(write_idx, std::memory_order_relaxed);
-    for (int32_t i = 0; i < count; i++) {
-        buf[w] = src[i];
-        w++;
-        if (w >= capacity) w = 0;
-    }
-    std::atomic_store_explicit(write_idx, w, std::memory_order_release);
-}
-
-static inline void ring_read(int16_t* buf, int32_t capacity,
-                              const wzp_atomic_int* write_idx, wzp_atomic_int* read_idx,
-                              int16_t* dst, int32_t count) {
-    int32_t r = std::atomic_load_explicit(read_idx, std::memory_order_relaxed);
-    for (int32_t i = 0; i < count; i++) {
-        dst[i] = buf[r];
-        r++;
-        if (r >= capacity) r = 0;
-    }
-    std::atomic_store_explicit(read_idx, r, std::memory_order_release);
-}
-
-// ---------------------------------------------------------------------------
-// Global state
-// ---------------------------------------------------------------------------
-
-static std::shared_ptr<oboe::AudioStream> g_capture_stream;
-static std::shared_ptr<oboe::AudioStream> g_playout_stream;
-// Value copy — the WzpOboeRings the Rust side passes us lives on the caller's
-// stack frame and goes away as soon as wzp_oboe_start returns. The raw
-// int16/atomic pointers INSIDE the struct point into the Rust-owned, leaked-
-// for-the-lifetime-of-the-process AudioBackend singleton, so copying the
-// struct by value is safe and keeps the inner pointers valid indefinitely.
-// g_rings_valid guards the audio-callback-side read; clearing it in stop()
-// signals "no backend" to the callbacks which then return silence + Stop.
-static WzpOboeRings g_rings{};
-static std::atomic<bool> g_rings_valid{false};
-static std::atomic<bool> g_running{false};
-static std::atomic<float> g_capture_latency_ms{0.0f};
-static std::atomic<float> g_playout_latency_ms{0.0f};
-
-// ---------------------------------------------------------------------------
-// Capture callback
-// ---------------------------------------------------------------------------
-
-class CaptureCallback : public oboe::AudioStreamDataCallback {
-public:
-    uint64_t calls = 0;
-    uint64_t total_frames = 0;
-    uint64_t total_written = 0;
-    uint64_t ring_full_drops = 0;
-
-    oboe::DataCallbackResult onAudioReady(
-            oboe::AudioStream* stream,
-            void* audioData,
-            int32_t numFrames) override {
-        if (!g_running.load(std::memory_order_relaxed) ||
-            !g_rings_valid.load(std::memory_order_acquire)) {
-            return oboe::DataCallbackResult::Stop;
-        }
-
-        const int16_t* src = static_cast<const int16_t*>(audioData);
-        int32_t avail = ring_available_write(g_rings.capture_write_idx,
-                                              g_rings.capture_read_idx,
-                                              g_rings.capture_capacity);
-        int32_t to_write = (numFrames < avail) ? numFrames : avail;
-        if (to_write > 0) {
-            ring_write(g_rings.capture_buf, g_rings.capture_capacity,
-                       g_rings.capture_write_idx, g_rings.capture_read_idx,
-                       src, to_write);
-        }
-        total_frames += numFrames;
-        total_written += to_write;
-        if (to_write < numFrames) {
-            ring_full_drops += (numFrames - to_write);
-        }
-
-        // Sample-range probe on the FIRST callback to prove we get real audio
-        if (calls == 0 && numFrames > 0) {
-            int16_t lo = src[0], hi = src[0];
-            int32_t sumsq = 0;
-            for (int32_t i = 0; i < numFrames; i++) {
-                if (src[i] < lo) lo = src[i];
-                if (src[i] > hi) hi = src[i];
-                sumsq += (int32_t)src[i] * (int32_t)src[i];
-            }
-            int32_t rms = (int32_t) (numFrames > 0 ? (int32_t)__builtin_sqrt((double)sumsq / (double)numFrames) : 0);
-            LOGI("capture cb#0: numFrames=%d sample_range=[%d..%d] rms=%d to_write=%d",
-                 numFrames, lo, hi, rms, to_write);
-        }
-        // Heartbeat every 50 callbacks (~1s at 20ms/burst)
-        calls++;
-        if ((calls % 50) == 0) {
-            LOGI("capture heartbeat: calls=%llu numFrames=%d ring_avail_write=%d to_write=%d full_drops=%llu total_written=%llu",
-                 (unsigned long long)calls, numFrames, avail, to_write,
-                 (unsigned long long)ring_full_drops, (unsigned long long)total_written);
-        }
-
-        // Update latency estimate
-        auto result = stream->calculateLatencyMillis();
-        if (result) {
-            g_capture_latency_ms.store(static_cast<float>(result.value()),
-                                        std::memory_order_relaxed);
-        }
-
-        return oboe::DataCallbackResult::Continue;
-    }
-};
-
-// ---------------------------------------------------------------------------
-// Playout callback
-// ---------------------------------------------------------------------------
-
-class PlayoutCallback : public oboe::AudioStreamDataCallback {
-public:
-    uint64_t calls = 0;
-    uint64_t total_frames = 0;
-    uint64_t total_played_real = 0;
-    uint64_t underrun_frames = 0;
-    uint64_t nonempty_calls = 0;
-
-    oboe::DataCallbackResult onAudioReady(
-            oboe::AudioStream* stream,
-            void* audioData,
-            int32_t numFrames) override {
-        if (!g_running.load(std::memory_order_relaxed) ||
-            !g_rings_valid.load(std::memory_order_acquire)) {
-            memset(audioData, 0, numFrames * sizeof(int16_t));
-            return oboe::DataCallbackResult::Stop;
-        }
-
-        int16_t* dst = static_cast<int16_t*>(audioData);
-        int32_t avail = ring_available_read(g_rings.playout_write_idx,
-                                             g_rings.playout_read_idx,
-                                             g_rings.playout_capacity);
-        int32_t to_read = (numFrames < avail) ? numFrames : avail;
-
-        if (to_read > 0) {
-            ring_read(g_rings.playout_buf, g_rings.playout_capacity,
-                      g_rings.playout_write_idx, g_rings.playout_read_idx,
-                      dst, to_read);
-            nonempty_calls++;
-        }
-        // Fill remainder with silence on underrun
-        if (to_read < numFrames) {
-            memset(dst + to_read, 0, (numFrames - to_read) * sizeof(int16_t));
-            underrun_frames += (numFrames - to_read);
-        }
-        total_frames += numFrames;
-        total_played_real += to_read;
-
-        // First callback: log requested config + prove we're being called
-        if (calls == 0) {
-            LOGI("playout cb#0: numFrames=%d ring_avail_read=%d to_read=%d",
-                 numFrames, avail, to_read);
-        }
-        // On the first callback that actually has data, log the sample range
-        // so we can tell if the samples coming out of the ring look like real
-        // audio vs constant-zeroes vs garbage.
-        if (to_read > 0 && nonempty_calls == 1) {
-            int16_t lo = dst[0], hi = dst[0];
-            int32_t sumsq = 0;
-            for (int32_t i = 0; i < to_read; i++) {
-                if (dst[i] < lo) lo = dst[i];
-                if (dst[i] > hi) hi = dst[i];
-                sumsq += (int32_t)dst[i] * (int32_t)dst[i];
-            }
-            int32_t rms = (to_read > 0) ? (int32_t)__builtin_sqrt((double)sumsq / (double)to_read) : 0;
-            LOGI("playout FIRST nonempty read: to_read=%d sample_range=[%d..%d] rms=%d",
-                 to_read, lo, hi, rms);
-        }
-        // Heartbeat every 50 callbacks (~1s at 20ms/burst)
-        calls++;
-        if ((calls % 50) == 0) {
-            int state = (int)stream->getState();
-            auto xrunRes = stream->getXRunCount();
-            int xruns = xrunRes ? xrunRes.value() : -1;
-            LOGI("playout heartbeat: calls=%llu nonempty=%llu numFrames=%d ring_avail_read=%d to_read=%d underrun_frames=%llu total_played_real=%llu state=%d xruns=%d",
-                 (unsigned long long)calls, (unsigned long long)nonempty_calls,
-                 numFrames, avail, to_read,
-                 (unsigned long long)underrun_frames, (unsigned long long)total_played_real,
-                 state, xruns);
-        }
-
-        // Update latency estimate
-        auto result = stream->calculateLatencyMillis();
-        if (result) {
-            g_playout_latency_ms.store(static_cast<float>(result.value()),
-                                        std::memory_order_relaxed);
-        }
-
-        return oboe::DataCallbackResult::Continue;
-    }
-};
-
-static CaptureCallback g_capture_cb;
-static PlayoutCallback g_playout_cb;
-
-// ---------------------------------------------------------------------------
-// Public C API
-// ---------------------------------------------------------------------------
-
-int wzp_oboe_start(const WzpOboeConfig* config, const WzpOboeRings* rings) {
-    if (g_running.load(std::memory_order_relaxed)) {
-        LOGW("wzp_oboe_start: already running");
-        return -1;
-    }
-
-    // Deep-copy the rings struct into static storage BEFORE we publish it to
-    // the audio callbacks — `rings` points at the caller's stack frame and
-    // goes away as soon as this function returns.
-    g_rings = *rings;
-    g_rings_valid.store(true, std::memory_order_release);
-
-    // Build capture stream
-    oboe::AudioStreamBuilder captureBuilder;
-    captureBuilder.setDirection(oboe::Direction::Input)
-        ->setPerformanceMode(oboe::PerformanceMode::LowLatency)
-        ->setSharingMode(oboe::SharingMode::Exclusive)
-        ->setFormat(oboe::AudioFormat::I16)
-        ->setChannelCount(config->channel_count)
-        ->setSampleRate(config->sample_rate)
-        ->setFramesPerDataCallback(config->frames_per_burst)
-        ->setInputPreset(oboe::InputPreset::VoiceCommunication)
-        ->setDataCallback(&g_capture_cb);
-
-    oboe::Result result = captureBuilder.openStream(g_capture_stream);
-    if (result != oboe::Result::OK) {
-        LOGE("Failed to open capture stream: %s", oboe::convertToText(result));
-        return -2;
-    }
-    LOGI("capture stream opened: actualSR=%d actualCh=%d actualFormat=%d actualFramesPerBurst=%d actualFramesPerDataCallback=%d bufferCapacityInFrames=%d sharing=%d perfMode=%d",
-         g_capture_stream->getSampleRate(),
-         g_capture_stream->getChannelCount(),
-         (int)g_capture_stream->getFormat(),
-         g_capture_stream->getFramesPerBurst(),
-         g_capture_stream->getFramesPerDataCallback(),
-         g_capture_stream->getBufferCapacityInFrames(),
-         (int)g_capture_stream->getSharingMode(),
-         (int)g_capture_stream->getPerformanceMode());
-
-    // Build playout stream.
-    //
-    // Regression triangulation between builds:
-    //   96be740 (Usage::Media, default API): playout callback DID drain
-    //   the ring at steady 50Hz (playout heartbeat: calls=1100,
-    //   total_played_real=1055040). Audio not audible because OS routing
-    //   sent it to a silent output.
-    //
-    //   8c36fb5 (Usage::VoiceCommunication + setAudioApi(AAudio) +
-    //   ContentType::Speech): playout callback fired cb#0 once then
-    //   stopped draining the ring entirely. written_samples stuck at
-    //   ring capacity (7679) across all subsequent heartbeats, so Oboe
-    //   accepted zero samples after startup. Still inaudible.
-    //
-    // Hypothesis: forcing setAudioApi(AAudio) + VoiceCommunication on
-    // Pixel 6 / Android 15 opens a stream that succeeds at cb#0 but
-    // then detaches from the real audio driver. Reverting to the
-    // config that at least drove callbacks correctly, plus the
-    // Kotlin-side MODE_IN_COMMUNICATION + setSpeakerphoneOn(true)
-    // handled in MainActivity.kt to route audio to the loud speaker.
-    // Usage::VoiceCommunication is the correct Oboe usage for a VoIP app
-    // — it respects Android's in-call audio routing and lets
-    // AudioManager.setSpeakerphoneOn/setBluetoothScoOn actually switch
-    // between earpiece, loudspeaker, and Bluetooth headset. Combined with
-    // MODE_IN_COMMUNICATION set from MainActivity.kt and
-    // speakerphoneOn=false by default, this produces handset/earpiece as
-    // the default output.
-    //
-    // IMPORTANT: do NOT add setAudioApi(AAudio) here. Build 8c36fb5 proved
-    // forcing AAudio with Usage::VoiceCommunication makes the playout
-    // callback stop draining the ring after cb#0, even though the stream
-    // opens successfully. Letting Oboe pick the API (which will be AAudio
-    // on API ≥ 27 but via a different codepath) kept callbacks firing in
-    // every other build.
-    oboe::AudioStreamBuilder playoutBuilder;
-    playoutBuilder.setDirection(oboe::Direction::Output)
-        ->setPerformanceMode(oboe::PerformanceMode::LowLatency)
-        ->setSharingMode(oboe::SharingMode::Exclusive)
-        ->setFormat(oboe::AudioFormat::I16)
-        ->setChannelCount(config->channel_count)
-        ->setSampleRate(config->sample_rate)
-        ->setFramesPerDataCallback(config->frames_per_burst)
-        ->setUsage(oboe::Usage::VoiceCommunication)
-        ->setDataCallback(&g_playout_cb);
-
-    result = playoutBuilder.openStream(g_playout_stream);
-    if (result != oboe::Result::OK) {
-        LOGE("Failed to open playout stream: %s", oboe::convertToText(result));
-        g_capture_stream->close();
-        g_capture_stream.reset();
-        return -3;
-    }
-    LOGI("playout stream opened: actualSR=%d actualCh=%d actualFormat=%d actualFramesPerBurst=%d actualFramesPerDataCallback=%d bufferCapacityInFrames=%d sharing=%d perfMode=%d",
-         g_playout_stream->getSampleRate(),
-         g_playout_stream->getChannelCount(),
-         (int)g_playout_stream->getFormat(),
-         g_playout_stream->getFramesPerBurst(),
-         g_playout_stream->getFramesPerDataCallback(),
-         g_playout_stream->getBufferCapacityInFrames(),
-         (int)g_playout_stream->getSharingMode(),
-         (int)g_playout_stream->getPerformanceMode());
-
-    g_running.store(true, std::memory_order_release);
-
-    // Start both streams
-    result = g_capture_stream->requestStart();
-    if (result != oboe::Result::OK) {
-        LOGE("Failed to start capture: %s", oboe::convertToText(result));
-        g_running.store(false, std::memory_order_release);
-        g_capture_stream->close();
-        g_playout_stream->close();
-        g_capture_stream.reset();
-        g_playout_stream.reset();
-        return -4;
-    }
-
-    result = g_playout_stream->requestStart();
-    if (result != oboe::Result::OK) {
-        LOGE("Failed to start playout: %s", oboe::convertToText(result));
-        g_running.store(false, std::memory_order_release);
-        g_capture_stream->requestStop();
-        g_capture_stream->close();
-        g_playout_stream->close();
-        g_capture_stream.reset();
-        g_playout_stream.reset();
-        return -5;
-    }
-
-    LOGI("Oboe started: sr=%d burst=%d ch=%d",
-         config->sample_rate, config->frames_per_burst, config->channel_count);
-    return 0;
-}
-
-void wzp_oboe_stop(void) {
-    g_running.store(false, std::memory_order_release);
-    // Tell the audio callbacks to stop touching g_rings BEFORE we tear down
-    // the streams, so any in-flight callback returns Stop instead of reading
-    // stale pointers.
-    g_rings_valid.store(false, std::memory_order_release);
-
-    if (g_capture_stream) {
-        g_capture_stream->requestStop();
-        g_capture_stream->close();
-        g_capture_stream.reset();
-    }
-    if (g_playout_stream) {
-        g_playout_stream->requestStop();
-        g_playout_stream->close();
-        g_playout_stream.reset();
-    }
-
-    LOGI("Oboe stopped");
-}
-
-float wzp_oboe_capture_latency_ms(void) {
-    return g_capture_latency_ms.load(std::memory_order_relaxed);
-}
-
-float wzp_oboe_playout_latency_ms(void) {
-    return g_playout_latency_ms.load(std::memory_order_relaxed);
-}
-
-int wzp_oboe_is_running(void) {
-    return g_running.load(std::memory_order_relaxed) ? 1 : 0;
-}
-
-#else
-// Non-Android fallback — should not be reached; oboe_stub.cpp is used instead.
-// Provide empty implementations just in case.
-
-int wzp_oboe_start(const WzpOboeConfig* config, const WzpOboeRings* rings) {
-    (void)config; (void)rings;
-    return -99;
-}
-
-void wzp_oboe_stop(void) {}
-float wzp_oboe_capture_latency_ms(void) { return 0.0f; }
-float wzp_oboe_playout_latency_ms(void) { return 0.0f; }
-int wzp_oboe_is_running(void) { return 0; }
-
-#endif // __ANDROID__

crates/wzp-native/cpp/oboe_bridge.h

@@ -1,43 +0,0 @@
-#ifndef WZP_OBOE_BRIDGE_H
-#define WZP_OBOE_BRIDGE_H
-
-#include <stdint.h>
-
-#ifdef __cplusplus
-#include <atomic>
-typedef std::atomic<int32_t> wzp_atomic_int;
-extern "C" {
-#else
-#include <stdatomic.h>
-typedef atomic_int wzp_atomic_int;
-#endif
-
-typedef struct {
-    int32_t sample_rate;
-    int32_t frames_per_burst;
-    int32_t channel_count;
-} WzpOboeConfig;
-
-typedef struct {
-    int16_t* capture_buf;
-    int32_t  capture_capacity;
-    wzp_atomic_int* capture_write_idx;
-    wzp_atomic_int* capture_read_idx;
-
-    int16_t* playout_buf;
-    int32_t  playout_capacity;
-    wzp_atomic_int* playout_write_idx;
-    wzp_atomic_int* playout_read_idx;
-} WzpOboeRings;
-
-int wzp_oboe_start(const WzpOboeConfig* config, const WzpOboeRings* rings);
-void wzp_oboe_stop(void);
-float wzp_oboe_capture_latency_ms(void);
-float wzp_oboe_playout_latency_ms(void);
-int wzp_oboe_is_running(void);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif // WZP_OBOE_BRIDGE_H

crates/wzp-native/cpp/oboe_stub.cpp

@@ -1,27 +0,0 @@
-// Stub implementation for non-Android host builds (testing, cargo check, etc.)
-
-#include "oboe_bridge.h"
-#include <stdio.h>
-
-int wzp_oboe_start(const WzpOboeConfig* config, const WzpOboeRings* rings) {
-    (void)config;
-    (void)rings;
-    fprintf(stderr, "wzp_oboe_start: stub (not on Android)\n");
-    return 0;
-}
-
-void wzp_oboe_stop(void) {
-    fprintf(stderr, "wzp_oboe_stop: stub (not on Android)\n");
-}
-
-float wzp_oboe_capture_latency_ms(void) {
-    return 0.0f;
-}
-
-float wzp_oboe_playout_latency_ms(void) {
-    return 0.0f;
-}
-
-int wzp_oboe_is_running(void) {
-    return 0;
-}

crates/wzp-native/src/lib.rs

@@ -1,331 +0,0 @@
-//! wzp-native — standalone Android cdylib for all the C++ audio code.
-//!
-//! Built with `cargo ndk`, NOT `cargo tauri android build`. Loaded at
-//! runtime by the Tauri desktop cdylib (`wzp-desktop`) via libloading.
-//! See `docs/incident-tauri-android-init-tcb.md` for why the split exists.
-//!
-//! Phase 2: real Oboe audio backend.
-//!
-//! Architecture: Oboe runs capture + playout streams on its own high-
-//! priority AAudio callback threads inside the C++ bridge. Two SPSC ring
-//! buffers (capture and playout) are shared between the C++ callbacks
-//! and the Rust side via atomic indices — no locks on the hot path.
-//! `wzp-desktop` drains the capture ring into its Opus encoder and fills
-//! the playout ring with decoded PCM.
-
-use std::sync::atomic::{AtomicI32, Ordering};
-
-// ─── Phase 1 smoke-test exports (kept for sanity checks) ─────────────────
-
-/// Returns 42. Used by wzp-desktop's setup() to verify dlopen + dlsym
-/// work before any audio code runs.
-#[unsafe(no_mangle)]
-pub extern "C" fn wzp_native_version() -> i32 {
-    42
-}
-
-/// Writes a NUL-terminated string into `out` (capped at `cap`) and
-/// returns bytes written excluding the NUL.
-#[unsafe(no_mangle)]
-pub unsafe extern "C" fn wzp_native_hello(out: *mut u8, cap: usize) -> usize {
-    const MSG: &[u8] = b"hello from wzp-native\0";
-    if out.is_null() || cap == 0 {
-        return 0;
-    }
-    let n = MSG.len().min(cap);
-    unsafe {
-        core::ptr::copy_nonoverlapping(MSG.as_ptr(), out, n);
-        *out.add(n - 1) = 0;
-    }
-    n - 1
-}
-
-// ─── C++ Oboe bridge FFI ─────────────────────────────────────────────────
-
-#[repr(C)]
-struct WzpOboeConfig {
-    sample_rate: i32,
-    frames_per_burst: i32,
-    channel_count: i32,
-}
-
-#[repr(C)]
-struct WzpOboeRings {
-    capture_buf: *mut i16,
-    capture_capacity: i32,
-    capture_write_idx: *mut AtomicI32,
-    capture_read_idx: *mut AtomicI32,
-    playout_buf: *mut i16,
-    playout_capacity: i32,
-    playout_write_idx: *mut AtomicI32,
-    playout_read_idx: *mut AtomicI32,
-}
-
-// SAFETY: atomics synchronise producer/consumer; raw pointers are owned
-// by the AudioBackend singleton below whose lifetime covers all calls.
-unsafe impl Send for WzpOboeRings {}
-unsafe impl Sync for WzpOboeRings {}
-
-unsafe extern "C" {
-    fn wzp_oboe_start(config: *const WzpOboeConfig, rings: *const WzpOboeRings) -> i32;
-    fn wzp_oboe_stop();
-    fn wzp_oboe_capture_latency_ms() -> f32;
-    fn wzp_oboe_playout_latency_ms() -> f32;
-    fn wzp_oboe_is_running() -> i32;
-}
-
-// ─── SPSC ring buffer (shared with C++ via AtomicI32) ────────────────────
-
-/// 20 ms @ 48 kHz mono = 960 samples.
-const FRAME_SAMPLES: usize = 960;
-/// ~160 ms headroom at 48 kHz.
-const RING_CAPACITY: usize = 7680;
-
-struct RingBuffer {
-    buf: Vec<i16>,
-    capacity: usize,
-    write_idx: AtomicI32,
-    read_idx: AtomicI32,
-}
-
-// SAFETY: SPSC with atomic read/write cursors; producer and consumer
-// are always on different threads.
-unsafe impl Send for RingBuffer {}
-unsafe impl Sync for RingBuffer {}
-
-impl RingBuffer {
-    fn new(capacity: usize) -> Self {
-        Self {
-            buf: vec![0i16; capacity],
-            capacity,
-            write_idx: AtomicI32::new(0),
-            read_idx: AtomicI32::new(0),
-        }
-    }
-
-    fn available_read(&self) -> usize {
-        let w = self.write_idx.load(Ordering::Acquire);
-        let r = self.read_idx.load(Ordering::Relaxed);
-        let avail = w - r;
-        if avail < 0 { (avail + self.capacity as i32) as usize } else { avail as usize }
-    }
-
-    fn available_write(&self) -> usize {
-        self.capacity - 1 - self.available_read()
-    }
-
-    fn write(&self, data: &[i16]) -> usize {
-        let count = data.len().min(self.available_write());
-        if count == 0 {
-            return 0;
-        }
-        let mut w = self.write_idx.load(Ordering::Relaxed) as usize;
-        let cap = self.capacity;
-        let buf_ptr = self.buf.as_ptr() as *mut i16;
-        for sample in &data[..count] {
-            unsafe { *buf_ptr.add(w) = *sample; }
-            w += 1;
-            if w >= cap { w = 0; }
-        }
-        self.write_idx.store(w as i32, Ordering::Release);
-        count
-    }
-
-    fn read(&self, out: &mut [i16]) -> usize {
-        let count = out.len().min(self.available_read());
-        if count == 0 {
-            return 0;
-        }
-        let mut r = self.read_idx.load(Ordering::Relaxed) as usize;
-        let cap = self.capacity;
-        let buf_ptr = self.buf.as_ptr();
-        for slot in &mut out[..count] {
-            unsafe { *slot = *buf_ptr.add(r); }
-            r += 1;
-            if r >= cap { r = 0; }
-        }
-        self.read_idx.store(r as i32, Ordering::Release);
-        count
-    }
-
-    fn buf_ptr(&self) -> *mut i16 {
-        self.buf.as_ptr() as *mut i16
-    }
-    fn write_idx_ptr(&self) -> *mut AtomicI32 {
-        &self.write_idx as *const AtomicI32 as *mut AtomicI32
-    }
-    fn read_idx_ptr(&self) -> *mut AtomicI32 {
-        &self.read_idx as *const AtomicI32 as *mut AtomicI32
-    }
-}
-
-// ─── AudioBackend singleton ──────────────────────────────────────────────
-//
-// There is one global AudioBackend instance because Oboe's C++ side
-// holds its own singleton of the streams. The `Box::leak`'d statics own
-// the ring buffers for the lifetime of the process — dropping them while
-// Oboe is still running would cause use-after-free in the audio callback.
-
-use std::sync::OnceLock;
-
-struct AudioBackend {
-    capture: RingBuffer,
-    playout: RingBuffer,
-    started: std::sync::Mutex<bool>,
-    /// Per-write logging throttle counter for wzp_native_audio_write_playout.
-    playout_write_log_count: std::sync::atomic::AtomicU64,
-}
-
-static BACKEND: OnceLock<&'static AudioBackend> = OnceLock::new();
-
-fn backend() -> &'static AudioBackend {
-    BACKEND.get_or_init(|| {
-        Box::leak(Box::new(AudioBackend {
-            capture: RingBuffer::new(RING_CAPACITY),
-            playout: RingBuffer::new(RING_CAPACITY),
-            started: std::sync::Mutex::new(false),
-            playout_write_log_count: std::sync::atomic::AtomicU64::new(0),
-        }))
-    })
-}
-
-// ─── C FFI for wzp-desktop ───────────────────────────────────────────────
-
-/// Start the Oboe audio streams. Returns 0 on success, non-zero on error.
-/// Idempotent — calling while already running is a no-op that returns 0.
-#[unsafe(no_mangle)]
-pub extern "C" fn wzp_native_audio_start() -> i32 {
-    let b = backend();
-    let mut started = match b.started.lock() {
-        Ok(g) => g,
-        Err(_) => return -1,
-    };
-    if *started {
-        return 0;
-    }
-
-    let config = WzpOboeConfig {
-        sample_rate: 48_000,
-        frames_per_burst: FRAME_SAMPLES as i32,
-        channel_count: 1,
-    };
-    let rings = WzpOboeRings {
-        capture_buf: b.capture.buf_ptr(),
-        capture_capacity: b.capture.capacity as i32,
-        capture_write_idx: b.capture.write_idx_ptr(),
-        capture_read_idx: b.capture.read_idx_ptr(),
-        playout_buf: b.playout.buf_ptr(),
-        playout_capacity: b.playout.capacity as i32,
-        playout_write_idx: b.playout.write_idx_ptr(),
-        playout_read_idx: b.playout.read_idx_ptr(),
-    };
-    let ret = unsafe { wzp_oboe_start(&config, &rings) };
-    if ret != 0 {
-        return ret;
-    }
-    *started = true;
-    0
-}
-
-/// Stop Oboe. Idempotent. Safe to call from any thread.
-#[unsafe(no_mangle)]
-pub extern "C" fn wzp_native_audio_stop() {
-    let b = backend();
-    if let Ok(mut started) = b.started.lock() {
-        if *started {
-            unsafe { wzp_oboe_stop() };
-            *started = false;
-        }
-    }
-}
-
-/// Read captured PCM samples from the capture ring. Returns the number
-/// of `i16` samples actually copied into `out` (may be less than
-/// `out_len` if the ring is empty).
-#[unsafe(no_mangle)]
-pub unsafe extern "C" fn wzp_native_audio_read_capture(out: *mut i16, out_len: usize) -> usize {
-    if out.is_null() || out_len == 0 {
-        return 0;
-    }
-    let slice = unsafe { std::slice::from_raw_parts_mut(out, out_len) };
-    backend().capture.read(slice)
-}
-
-/// Write PCM samples into the playout ring. Returns the number of
-/// samples actually enqueued (may be less than `in_len` if the ring
-/// is nearly full — in practice the caller should pace to 20 ms
-/// frames and spin briefly if the ring is full).
-#[unsafe(no_mangle)]
-pub unsafe extern "C" fn wzp_native_audio_write_playout(input: *const i16, in_len: usize) -> usize {
-    if input.is_null() || in_len == 0 {
-        return 0;
-    }
-    let slice = unsafe { std::slice::from_raw_parts(input, in_len) };
-    let b = backend();
-    let before_w = b.playout.write_idx.load(std::sync::atomic::Ordering::Relaxed);
-    let before_r = b.playout.read_idx.load(std::sync::atomic::Ordering::Relaxed);
-    let written = b.playout.write(slice);
-    // First few writes: log ring state + sample range so we can compare what
-    // engine.rs hands us to what the C++ playout callback reads.
-    let first_writes = b.playout_write_log_count.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
-    if first_writes < 3 || first_writes % 50 == 0 {
-        let (mut lo, mut hi, mut sumsq) = (i16::MAX, i16::MIN, 0i64);
-        for &s in slice.iter() {
-            if s < lo { lo = s; }
-            if s > hi { hi = s; }
-            sumsq += (s as i64) * (s as i64);
-        }
-        let rms = (sumsq as f64 / slice.len() as f64).sqrt() as i32;
-        let avail_w_after = b.playout.available_write();
-        let avail_r_after = b.playout.available_read();
-        let msg = format!(
-            "playout WRITE #{first_writes}: in_len={} written={} range=[{lo}..{hi}] rms={rms} before_w={before_w} before_r={before_r} avail_read_after={avail_r_after} avail_write_after={avail_w_after}",
-            slice.len(), written
-        );
-        unsafe {
-            android_log(msg.as_str());
-        }
-    }
-    written
-}
-
-// Minimal android logcat shim so we can print from the cdylib without pulling
-// in android_logger crate (which would add another dep that has to build with
-// cargo-ndk). Uses libc's __android_log_print via extern linkage.
-#[cfg(target_os = "android")]
-unsafe extern "C" {
-    fn __android_log_write(prio: i32, tag: *const u8, text: *const u8) -> i32;
-}
-
-#[cfg(target_os = "android")]
-unsafe fn android_log(msg: &str) {
-    // ANDROID_LOG_INFO = 4. Tag and text must be NUL-terminated.
-    let tag = b"wzp-native\0";
-    let mut buf = Vec::with_capacity(msg.len() + 1);
-    buf.extend_from_slice(msg.as_bytes());
-    buf.push(0);
-    unsafe { __android_log_write(4, tag.as_ptr(), buf.as_ptr()); }
-}
-
-#[cfg(not(target_os = "android"))]
-#[allow(dead_code)]
-unsafe fn android_log(_msg: &str) {}
-
-/// Current capture latency reported by Oboe, in milliseconds. Returns
-/// NaN / 0.0 if the stream isn't running.
-#[unsafe(no_mangle)]
-pub extern "C" fn wzp_native_audio_capture_latency_ms() -> f32 {
-    unsafe { wzp_oboe_capture_latency_ms() }
-}
-
-/// Current playout latency reported by Oboe, in milliseconds.
-#[unsafe(no_mangle)]
-pub extern "C" fn wzp_native_audio_playout_latency_ms() -> f32 {
-    unsafe { wzp_oboe_playout_latency_ms() }
-}
-
-/// Non-zero if both Oboe streams are currently running.
-#[unsafe(no_mangle)]
-pub extern "C" fn wzp_native_audio_is_running() -> i32 {
-    unsafe { wzp_oboe_is_running() }
-}

crates/wzp-proto/src/codec_id.rs

@@ -18,12 +18,6 @@ pub enum CodecId {
     Codec2_1200 = 4,
     /// Comfort noise descriptor (silence suppression)
     ComfortNoise = 5,
-    /// Opus at 32kbps (studio low)
-    Opus32k = 6,
-    /// Opus at 48kbps (studio)
-    Opus48k = 7,
-    /// Opus at 64kbps (studio high)
-    Opus64k = 8,
 }
 
 impl CodecId {
@@ -33,9 +27,6 @@ impl CodecId {
             Self::Opus24k => 24_000,
             Self::Opus16k => 16_000,
             Self::Opus6k => 6_000,
-            Self::Opus32k => 32_000,
-            Self::Opus48k => 48_000,
-            Self::Opus64k => 64_000,
             Self::Codec2_3200 => 3_200,
             Self::Codec2_1200 => 1_200,
             Self::ComfortNoise => 0,
@@ -45,7 +36,8 @@ impl CodecId {
     /// Preferred frame duration in milliseconds.
     pub const fn frame_duration_ms(self) -> u8 {
         match self {
-            Self::Opus24k | Self::Opus16k | Self::Opus32k | Self::Opus48k | Self::Opus64k => 20,
+            Self::Opus24k => 20,
+            Self::Opus16k => 20,
             Self::Opus6k => 40,
             Self::Codec2_3200 => 20,
             Self::Codec2_1200 => 40,
@@ -56,8 +48,7 @@ impl CodecId {
     /// Sample rate expected by this codec.
     pub const fn sample_rate_hz(self) -> u32 {
         match self {
-            Self::Opus24k | Self::Opus16k | Self::Opus6k
+            Self::Opus24k | Self::Opus16k | Self::Opus6k => 48_000,
-            | Self::Opus32k | Self::Opus48k | Self::Opus64k => 48_000,
             Self::Codec2_3200 | Self::Codec2_1200 => 8_000,
             Self::ComfortNoise => 48_000,
         }
@@ -72,9 +63,6 @@ impl CodecId {
             3 => Some(Self::Codec2_3200),
             4 => Some(Self::Codec2_1200),
             5 => Some(Self::ComfortNoise),
-            6 => Some(Self::Opus32k),
-            7 => Some(Self::Opus48k),
-            8 => Some(Self::Opus64k),
             _ => None,
         }
     }
@@ -83,12 +71,6 @@ impl CodecId {
     pub const fn to_wire(self) -> u8 {
         self as u8
     }
-
-    /// Returns true if this is an Opus variant.
-    pub const fn is_opus(self) -> bool {
-        matches!(self, Self::Opus6k | Self::Opus16k | Self::Opus24k
-            | Self::Opus32k | Self::Opus48k | Self::Opus64k)
-    }
 }
 
 /// Describes the complete quality configuration for a call session.
@@ -129,30 +111,6 @@ impl QualityProfile {
         frames_per_block: 8,
     };
 
-    /// Studio low: Opus 32kbps, minimal FEC.
-    pub const STUDIO_32K: Self = Self {
-        codec: CodecId::Opus32k,
-        fec_ratio: 0.1,
-        frame_duration_ms: 20,
-        frames_per_block: 5,
-    };
-
-    /// Studio: Opus 48kbps, minimal FEC.
-    pub const STUDIO_48K: Self = Self {
-        codec: CodecId::Opus48k,
-        fec_ratio: 0.1,
-        frame_duration_ms: 20,
-        frames_per_block: 5,
-    };
-
-    /// Studio high: Opus 64kbps, minimal FEC.
-    pub const STUDIO_64K: Self = Self {
-        codec: CodecId::Opus64k,
-        fec_ratio: 0.1,
-        frame_duration_ms: 20,
-        frames_per_block: 5,
-    };
-
     /// Estimated total bandwidth in kbps including FEC overhead.
     pub fn total_bitrate_kbps(&self) -> f32 {
         let base = self.codec.bitrate_bps() as f32 / 1000.0;

crates/wzp-proto/src/jitter.rs

@@ -273,22 +273,11 @@ impl JitterBuffer {
             return;
         }
 
-        // Check if packet is too old (already played out).
+        // Check if packet is too old (already played out)
-        // A backward jump of >100 seq (~2s at 50fps) indicates a new sender in a
-        // federation room — reset instead of dropping.
         if self.stats.packets_played > 0 && seq_before(seq, self.next_playout_seq) {
-            let backward_distance = self.next_playout_seq.wrapping_sub(seq);
-            tracing::warn!(seq, next = self.next_playout_seq, backward_distance, "jitter: backward seq detected");
-            if backward_distance > 100 {
-                tracing::info!(seq, next = self.next_playout_seq, "jitter: RESET — new sender detected");
-                self.buffer.clear();
-                self.next_playout_seq = seq;
-                self.stats.packets_late = 0;
-            } else {
             self.stats.packets_late += 1;
             return;
         }
-        }
 
         // If we haven't started playout yet, adjust next_playout_seq to earliest known
         if self.stats.packets_played == 0 && seq_before(seq, self.next_playout_seq) {
@@ -423,22 +412,11 @@ impl JitterBuffer {
             return;
         }
 
-        // Check if packet is too old (already played out).
+        // Check if packet is too old (already played out)
-        // A backward jump of >100 seq (~2s at 50fps) indicates a new sender in a
-        // federation room — reset instead of dropping.
         if self.stats.packets_played > 0 && seq_before(seq, self.next_playout_seq) {
-            let backward_distance = self.next_playout_seq.wrapping_sub(seq);
-            tracing::warn!(seq, next = self.next_playout_seq, backward_distance, "jitter: backward seq detected");
-            if backward_distance > 100 {
-                tracing::info!(seq, next = self.next_playout_seq, "jitter: RESET — new sender detected");
-                self.buffer.clear();
-                self.next_playout_seq = seq;
-                self.stats.packets_late = 0;
-            } else {
             self.stats.packets_late += 1;
             return;
         }
-        }
 
         // If we haven't started playout yet, adjust next_playout_seq to earliest known
         if self.stats.packets_played == 0 && seq_before(seq, self.next_playout_seq) {

crates/wzp-proto/src/lib.rs

@@ -25,9 +25,8 @@ pub mod traits;
 pub use codec_id::{CodecId, QualityProfile};
 pub use error::*;
 pub use packet::{
-    CallAcceptMode, HangupReason, MediaHeader, MediaPacket, MiniFrameContext, MiniHeader,
+    HangupReason, MediaHeader, MediaPacket, MiniFrameContext, MiniHeader, QualityReport,
-    QualityReport, RoomParticipant, SignalMessage, TrunkEntry, TrunkFrame, FRAME_TYPE_FULL,
+    RoomParticipant, SignalMessage, TrunkEntry, TrunkFrame, FRAME_TYPE_FULL, FRAME_TYPE_MINI,
-    FRAME_TYPE_MINI,
 };
 pub use bandwidth::{BandwidthEstimator, CongestionState};
 pub use quality::{AdaptiveQualityController, NetworkContext, Tier};

crates/wzp-proto/src/packet.rs

@@ -584,26 +584,6 @@ pub enum SignalMessage {
         recommended_profile: crate::QualityProfile,
     },
 
-    /// Phase 4 telemetry: loss-recovery counts for the current session.
-    /// Sent periodically from receivers to the relay so Prometheus metrics
-    /// can distinguish DRED reconstructions from classical PLC invocations.
-    /// Fields default to 0 on old receivers (`#[serde(default)]`), so
-    /// introducing this variant is backward-compatible with pre-Phase-4
-    /// relays — they'll just log "unknown signal variant" on receipt.
-    LossRecoveryUpdate {
-        /// Total frames reconstructed via DRED since call start (monotonic).
-        #[serde(default)]
-        dred_reconstructions: u64,
-        /// Total frames filled via classical Opus/Codec2 PLC since call
-        /// start (monotonic).
-        #[serde(default)]
-        classical_plc_invocations: u64,
-        /// Total frames decoded since call start. Used by the relay to
-        /// compute recovery rates as a fraction of total frames.
-        #[serde(default)]
-        frames_decoded: u64,
-    },
-
     /// Connection keepalive / RTT measurement.
     Ping { timestamp_ms: u64 },
     Pong { timestamp_ms: u64 },
@@ -676,112 +656,6 @@ pub enum SignalMessage {
         /// List of participants currently in the room.
         participants: Vec<RoomParticipant>,
     },
-
-    // ── Federation signals (relay-to-relay) ──
-
-    /// Federation: initial handshake — the connecting relay identifies itself.
-    FederationHello {
-        /// TLS certificate fingerprint of the connecting relay.
-        tls_fingerprint: String,
-    },
-
-    /// Federation: this relay now has local participants in a global room.
-    GlobalRoomActive {
-        room: String,
-        /// Participants on the announcing relay (for federated presence).
-        #[serde(default)]
-        participants: Vec<RoomParticipant>,
-    },
-
-    /// Federation: this relay's last local participant left a global room.
-    GlobalRoomInactive {
-        room: String,
-    },
-
-    // ── Direct calling signals (client ↔ relay signaling) ──
-
-    /// Register on relay for direct calls. Sent on `_signal` connections
-    /// after optional AuthToken.
-    RegisterPresence {
-        /// Client's Ed25519 identity public key.
-        identity_pub: [u8; 32],
-        /// Signature over ("register-presence" || identity_pub).
-        signature: Vec<u8>,
-        /// Optional display name.
-        alias: Option<String>,
-    },
-
-    /// Relay confirms presence registration.
-    RegisterPresenceAck {
-        success: bool,
-        #[serde(skip_serializing_if = "Option::is_none")]
-        error: Option<String>,
-    },
-
-    /// Direct call offer routed through the relay to a specific peer.
-    DirectCallOffer {
-        /// Caller's fingerprint.
-        caller_fingerprint: String,
-        /// Caller's display name.
-        caller_alias: Option<String>,
-        /// Target's fingerprint.
-        target_fingerprint: String,
-        /// Unique call session ID (UUID).
-        call_id: String,
-        /// Caller's Ed25519 identity pub.
-        identity_pub: [u8; 32],
-        /// Caller's ephemeral X25519 pub (for key exchange on media connect).
-        ephemeral_pub: [u8; 32],
-        /// Signature over (ephemeral_pub || target_fingerprint || call_id).
-        signature: Vec<u8>,
-        /// Supported quality profiles.
-        supported_profiles: Vec<crate::QualityProfile>,
-    },
-
-    /// Callee's response to a direct call.
-    DirectCallAnswer {
-        call_id: String,
-        /// How the callee accepts (or rejects).
-        accept_mode: CallAcceptMode,
-        /// Callee's identity pub (present when accepting).
-        #[serde(skip_serializing_if = "Option::is_none")]
-        identity_pub: Option<[u8; 32]>,
-        /// Callee's ephemeral pub (present when accepting).
-        #[serde(skip_serializing_if = "Option::is_none")]
-        ephemeral_pub: Option<[u8; 32]>,
-        /// Signature (present when accepting).
-        #[serde(skip_serializing_if = "Option::is_none")]
-        signature: Option<Vec<u8>>,
-        /// Chosen quality profile (present when accepting).
-        #[serde(skip_serializing_if = "Option::is_none")]
-        chosen_profile: Option<crate::QualityProfile>,
-    },
-
-    /// Relay tells both parties: media room is ready.
-    CallSetup {
-        call_id: String,
-        /// Room name on the relay for the media session (e.g., "_call:a1b2c3d4").
-        room: String,
-        /// Relay address for the QUIC media connection.
-        relay_addr: String,
-    },
-
-    /// Ringing notification (relay → caller, callee received the offer).
-    CallRinging {
-        call_id: String,
-    },
-}
-
-/// How the callee responds to a direct call.
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub enum CallAcceptMode {
-    /// Reject the call.
-    Reject,
-    /// Accept with trust — in Phase 2, this enables P2P (reveals IP).
-    /// In Phase 1, behaves the same as AcceptGeneric.
-    AcceptTrusted,
-    /// Accept with privacy — relay always mediates media.
-    AcceptGeneric,
 }
 
 /// A participant entry in a RoomUpdate message.
@@ -791,10 +665,6 @@ pub struct RoomParticipant {
     pub fingerprint: String,
     /// Optional display name set by the client.
     pub alias: Option<String>,
-    /// Relay label — identifies which relay this participant is connected to.
-    /// None for local participants, Some("Relay B") for federated.
-    #[serde(default)]
-    pub relay_label: Option<String>,
 }
 
 /// Reasons for ending a call.

crates/wzp-proto/src/traits.rs

@@ -132,14 +132,6 @@ pub trait CryptoSession: Send + Sync {
     fn overhead(&self) -> usize {
         16 // ChaCha20-Poly1305 tag
     }
-
-    /// Short Authentication String (SAS) — 4-digit code for verbal verification.
-    /// Both peers derive the same code from the shared secret + identity keys.
-    /// If a MITM relay is intercepting, the codes will differ.
-    /// Returns None if SAS was not computed (e.g., relay-side sessions).
-    fn sas_code(&self) -> Option<u32> {
-        None
-    }
 }
 
 /// Key exchange using the Warzone identity model.

crates/wzp-relay/Cargo.toml

@@ -28,9 +28,6 @@ prometheus = "0.13"
 axum = { version = "0.7", default-features = false, features = ["tokio", "http1", "ws"] }
 tower-http = { version = "0.6", features = ["fs"] }
 futures-util = "0.3"
-dirs = "6"
-sha2 = { workspace = true }
-chrono = "0.4"
 
 [[bin]]
 name = "wzp-relay"

crates/wzp-relay/build.rs

@@ -1,18 +0,0 @@
-use std::process::Command;
-
-fn main() {
-    // Get git hash at build time
-    let output = Command::new("git")
-        .args(["rev-parse", "--short", "HEAD"])
-        .output();
-
-    let hash = match output {
-        Ok(o) if o.status.success() => {
-            String::from_utf8_lossy(&o.stdout).trim().to_string()
-        }
-        _ => "unknown".to_string(),
-    };
-
-    println!("cargo:rustc-env=WZP_BUILD_HASH={hash}");
-    println!("cargo:rerun-if-changed=.git/HEAD");
-}

crates/wzp-relay/src/call_registry.rs

@@ -1,199 +0,0 @@
-//! Direct call state tracking.
-//!
-//! Manages the lifecycle of 1:1 direct calls placed via the `_signal` channel.
-//! Each call goes through: Pending → Ringing → Active → Ended.
-
-use std::collections::HashMap;
-use std::time::{Duration, Instant};
-
-/// State of a direct call.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum DirectCallState {
-    /// Offer sent to callee, waiting for response.
-    Pending,
-    /// Callee acknowledged, ringing.
-    Ringing,
-    /// Call accepted, media room active.
-    Active,
-    /// Call ended (hangup, reject, timeout, or error).
-    Ended,
-}
-
-/// A tracked direct call between two users.
-pub struct DirectCall {
-    pub call_id: String,
-    pub caller_fingerprint: String,
-    pub callee_fingerprint: String,
-    pub state: DirectCallState,
-    pub accept_mode: Option<wzp_proto::CallAcceptMode>,
-    /// Private room name (set when accepted).
-    pub room_name: Option<String>,
-    pub created_at: Instant,
-    pub answered_at: Option<Instant>,
-    pub ended_at: Option<Instant>,
-}
-
-/// Registry of active direct calls.
-pub struct CallRegistry {
-    calls: HashMap<String, DirectCall>,
-}
-
-impl CallRegistry {
-    pub fn new() -> Self {
-        Self {
-            calls: HashMap::new(),
-        }
-    }
-
-    /// Create a new pending call. Returns the call_id.
-    pub fn create_call(&mut self, call_id: String, caller_fp: String, callee_fp: String) -> &DirectCall {
-        let call = DirectCall {
-            call_id: call_id.clone(),
-            caller_fingerprint: caller_fp,
-            callee_fingerprint: callee_fp,
-            state: DirectCallState::Pending,
-            accept_mode: None,
-            room_name: None,
-            created_at: Instant::now(),
-            answered_at: None,
-            ended_at: None,
-        };
-        self.calls.insert(call_id.clone(), call);
-        self.calls.get(&call_id).unwrap()
-    }
-
-    /// Get a call by ID.
-    pub fn get(&self, call_id: &str) -> Option<&DirectCall> {
-        self.calls.get(call_id)
-    }
-
-    /// Get a mutable call by ID.
-    pub fn get_mut(&mut self, call_id: &str) -> Option<&mut DirectCall> {
-        self.calls.get_mut(call_id)
-    }
-
-    /// Transition to Ringing state.
-    pub fn set_ringing(&mut self, call_id: &str) -> bool {
-        if let Some(call) = self.calls.get_mut(call_id) {
-            if call.state == DirectCallState::Pending {
-                call.state = DirectCallState::Ringing;
-                return true;
-            }
-        }
-        false
-    }
-
-    /// Transition to Active state.
-    pub fn set_active(&mut self, call_id: &str, mode: wzp_proto::CallAcceptMode, room: String) -> bool {
-        if let Some(call) = self.calls.get_mut(call_id) {
-            if call.state == DirectCallState::Pending || call.state == DirectCallState::Ringing {
-                call.state = DirectCallState::Active;
-                call.accept_mode = Some(mode);
-                call.room_name = Some(room);
-                call.answered_at = Some(Instant::now());
-                return true;
-            }
-        }
-        false
-    }
-
-    /// End a call.
-    pub fn end_call(&mut self, call_id: &str) -> Option<DirectCall> {
-        if let Some(call) = self.calls.get_mut(call_id) {
-            call.state = DirectCallState::Ended;
-            call.ended_at = Some(Instant::now());
-        }
-        self.calls.remove(call_id)
-    }
-
-    /// Find active/pending calls involving a fingerprint.
-    pub fn calls_for_fingerprint(&self, fp: &str) -> Vec<&DirectCall> {
-        self.calls.values()
-            .filter(|c| {
-                c.state != DirectCallState::Ended
-                    && (c.caller_fingerprint == fp || c.callee_fingerprint == fp)
-            })
-            .collect()
-    }
-
-    /// Find the peer's fingerprint in a call.
-    pub fn peer_fingerprint(&self, call_id: &str, my_fp: &str) -> Option<&str> {
-        self.calls.get(call_id).map(|c| {
-            if c.caller_fingerprint == my_fp {
-                c.callee_fingerprint.as_str()
-            } else {
-                c.caller_fingerprint.as_str()
-            }
-        })
-    }
-
-    /// Remove calls that have been pending longer than the timeout.
-    /// Returns call IDs of expired calls.
-    pub fn expire_stale(&mut self, timeout: Duration) -> Vec<DirectCall> {
-        let now = Instant::now();
-        let expired: Vec<String> = self.calls.iter()
-            .filter(|(_, c)| {
-                c.state == DirectCallState::Pending
-                    && now.duration_since(c.created_at) > timeout
-            })
-            .map(|(id, _)| id.clone())
-            .collect();
-
-        expired.into_iter()
-            .filter_map(|id| self.calls.remove(&id))
-            .collect()
-    }
-
-    /// Number of active (non-ended) calls.
-    pub fn active_count(&self) -> usize {
-        self.calls.values()
-            .filter(|c| c.state != DirectCallState::Ended)
-            .count()
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn call_lifecycle() {
-        let mut reg = CallRegistry::new();
-        reg.create_call("c1".into(), "alice".into(), "bob".into());
-
-        assert_eq!(reg.get("c1").unwrap().state, DirectCallState::Pending);
-        assert!(reg.set_ringing("c1"));
-        assert_eq!(reg.get("c1").unwrap().state, DirectCallState::Ringing);
-
-        assert!(reg.set_active("c1", wzp_proto::CallAcceptMode::AcceptGeneric, "_call:c1".into()));
-        assert_eq!(reg.get("c1").unwrap().state, DirectCallState::Active);
-        assert_eq!(reg.get("c1").unwrap().room_name.as_deref(), Some("_call:c1"));
-
-        let ended = reg.end_call("c1").unwrap();
-        assert_eq!(ended.state, DirectCallState::Ended);
-        assert_eq!(reg.active_count(), 0);
-    }
-
-    #[test]
-    fn expire_stale_calls() {
-        let mut reg = CallRegistry::new();
-        reg.create_call("c1".into(), "alice".into(), "bob".into());
-
-        // Not expired yet
-        let expired = reg.expire_stale(Duration::from_secs(30));
-        assert!(expired.is_empty());
-
-        // Force expiry with 0 timeout
-        let expired = reg.expire_stale(Duration::from_secs(0));
-        assert_eq!(expired.len(), 1);
-        assert_eq!(expired[0].call_id, "c1");
-    }
-
-    #[test]
-    fn peer_lookup() {
-        let mut reg = CallRegistry::new();
-        reg.create_call("c1".into(), "alice".into(), "bob".into());
-        assert_eq!(reg.peer_fingerprint("c1", "alice"), Some("bob"));
-        assert_eq!(reg.peer_fingerprint("c1", "bob"), Some("alice"));
-    }
-}

crates/wzp-relay/src/config.rs

@@ -3,41 +3,8 @@
 use serde::{Deserialize, Serialize};
 use std::net::SocketAddr;
 
-/// A federated peer relay.
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct PeerConfig {
-    /// Address of the peer relay (e.g., "193.180.213.68:4433").
-    pub url: String,
-    /// Expected TLS certificate fingerprint (hex, with colons).
-    pub fingerprint: String,
-    /// Optional human-readable label.
-    #[serde(default)]
-    pub label: Option<String>,
-}
-
-/// A trusted relay — accepts inbound federation without needing the peer's address.
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct TrustedConfig {
-    /// Expected TLS certificate fingerprint (hex, with colons).
-    pub fingerprint: String,
-    /// Optional human-readable label.
-    #[serde(default)]
-    pub label: Option<String>,
-}
-
-/// A room declared global — bridged across all federated peers.
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct GlobalRoomConfig {
-    /// Room name to bridge (e.g., "android").
-    pub name: String,
-}
-
 /// Configuration for the relay daemon.
-///
-/// All fields have defaults, so a minimal TOML file only needs the
-/// fields you want to override (e.g., just `[[peers]]`).
 #[derive(Clone, Debug, Serialize, Deserialize)]
-#[serde(default)]
 pub struct RelayConfig {
     /// Address to listen on for incoming connections (client-facing).
     pub listen_addr: SocketAddr,
@@ -77,22 +44,6 @@ pub struct RelayConfig {
     pub ws_port: Option<u16>,
     /// Directory to serve static files from (HTML/JS/WASM for web clients).
     pub static_dir: Option<String>,
-    /// Federation peer relays.
-    #[serde(default)]
-    pub peers: Vec<PeerConfig>,
-    /// Global rooms bridged across federation.
-    #[serde(default)]
-    pub global_rooms: Vec<GlobalRoomConfig>,
-    /// Trusted relay fingerprints — accept inbound federation from these relays.
-    /// Unlike [[peers]], no url is needed — the peer connects to us.
-    #[serde(default)]
-    pub trusted: Vec<TrustedConfig>,
-    /// Debug tap: log packet headers for matching rooms ("*" = all rooms).
-    /// Activated via --debug-tap <room> or debug_tap = "room" in TOML.
-    pub debug_tap: Option<String>,
-    /// JSONL event log path for protocol analysis (--event-log).
-    #[serde(skip)]
-    pub event_log: Option<String>,
 }
 
 impl Default for RelayConfig {
@@ -111,100 +62,6 @@ impl Default for RelayConfig {
             trunking_enabled: false,
             ws_port: None,
             static_dir: None,
-            peers: Vec::new(),
-            global_rooms: Vec::new(),
-            trusted: Vec::new(),
-            debug_tap: None,
-            event_log: None,
         }
     }
 }
-
-/// Load relay configuration from a TOML file.
-pub fn load_config(path: &str) -> Result<RelayConfig, anyhow::Error> {
-    let content = std::fs::read_to_string(path)?;
-    let config: RelayConfig = toml::from_str(&content)?;
-    Ok(config)
-}
-
-/// Info about this relay instance, used to generate personalized example configs.
-pub struct RelayInfo {
-    pub listen_addr: String,
-    pub tls_fingerprint: String,
-    pub public_ip: Option<String>,
-}
-
-/// Load config from path, or create a personalized example config if it doesn't exist.
-pub fn load_or_create_config(path: &str, info: Option<&RelayInfo>) -> Result<RelayConfig, anyhow::Error> {
-    let p = std::path::Path::new(path);
-    if p.exists() {
-        return load_config(path);
-    }
-    // Create parent directory if needed
-    if let Some(parent) = p.parent() {
-        std::fs::create_dir_all(parent)?;
-    }
-    // Generate personalized example config
-    let example = generate_example_config(info);
-    std::fs::write(p, &example)?;
-    eprintln!("Created example config at {path} — edit it and restart.");
-    let config: RelayConfig = toml::from_str(&example)?;
-    Ok(config)
-}
-
-/// Generate an example TOML config, personalized with this relay's info if available.
-fn generate_example_config(info: Option<&RelayInfo>) -> String {
-    let listen = info.map(|i| i.listen_addr.as_str()).unwrap_or("0.0.0.0:4433");
-    let peer_example = if let Some(i) = info {
-        let ip = i.public_ip.as_deref().unwrap_or("this-relay-ip");
-        format!(
-            r#"# Other relays can peer with this relay using:
-# [[peers]]
-# url = "{ip}:{port}"
-# fingerprint = "{fp}"
-# label = "This Relay""#,
-            port = listen.rsplit(':').next().unwrap_or("4433"),
-            fp = i.tls_fingerprint,
-        )
-    } else {
-        "# To peer with another relay, add its url + fingerprint:".to_string()
-    };
-
-    format!(
-        r#"# WarzonePhone Relay Configuration
-# See docs/ADMINISTRATION.md for full reference.
-
-# Listen address for client connections
-listen_addr = "{listen}"
-
-# Maximum concurrent sessions
-# max_sessions = 100
-
-# Prometheus metrics endpoint (uncomment to enable)
-# metrics_port = 9090
-
-# featherChat auth endpoint (uncomment to enable)
-# auth_url = "https://chat.example.com/v1/auth/validate"
-
-{peer_example}
-
-# Federation: peer relays we connect to (outbound)
-# [[peers]]
-# url = "other-relay.example.com:4433"
-# fingerprint = "aa:bb:cc:dd:..."
-# label = "Relay B"
-
-# Federation: relays we trust inbound connections from
-# [[trusted]]
-# fingerprint = "ee:ff:00:11:..."
-# label = "Relay X"
-
-# Global rooms bridged across all federated peers
-# [[global_rooms]]
-# name = "general"
-
-# Debug: log packet headers for a room ("*" for all)
-# debug_tap = "*"
-"#
-    )
-}

crates/wzp-relay/src/event_log.rs

@@ -1,200 +0,0 @@
-//! JSONL event log for protocol analysis.
-//!
-//! When `--event-log <path>` is set, every media packet emits a structured
-//! event at each decision point (recv, forward, drop, deliver).
-//! Use `wzp-analyzer` to correlate events across multiple relays.
-
-use std::path::PathBuf;
-
-use serde::Serialize;
-use tokio::sync::mpsc;
-use tracing::{error, info};
-
-/// A single protocol event for JSONL output.
-#[derive(Debug, Serialize)]
-pub struct Event {
-    /// ISO 8601 timestamp with microseconds.
-    pub ts: String,
-    /// Event type.
-    pub event: &'static str,
-    /// Room name.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub room: Option<String>,
-    /// Source address or peer label.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub src: Option<String>,
-    /// Packet sequence number.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub seq: Option<u16>,
-    /// Codec identifier.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub codec: Option<String>,
-    /// FEC block ID.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub fec_block: Option<u8>,
-    /// FEC symbol index.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub fec_sym: Option<u8>,
-    /// Is FEC repair packet.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub repair: Option<bool>,
-    /// Payload length in bytes.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub len: Option<usize>,
-    /// Number of recipients.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub to_count: Option<usize>,
-    /// Peer label (for federation events).
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub peer: Option<String>,
-    /// Drop/error reason.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub reason: Option<String>,
-    /// Presence action (active/inactive).
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub action: Option<String>,
-    /// Participant count (presence events).
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub participants: Option<usize>,
-}
-
-impl Event {
-    fn now() -> String {
-        chrono::Utc::now().format("%Y-%m-%dT%H:%M:%S%.6fZ").to_string()
-    }
-
-    /// Create a minimal event with just type and timestamp.
-    pub fn new(event: &'static str) -> Self {
-        Self {
-            ts: Self::now(),
-            event,
-            room: None,
-            src: None,
-            seq: None,
-            codec: None,
-            fec_block: None,
-            fec_sym: None,
-            repair: None,
-            len: None,
-            to_count: None,
-            peer: None,
-            reason: None,
-            action: None,
-            participants: None,
-        }
-    }
-
-    /// Set room.
-    pub fn room(mut self, room: &str) -> Self { self.room = Some(room.to_string()); self }
-    /// Set source.
-    pub fn src(mut self, src: &str) -> Self { self.src = Some(src.to_string()); self }
-    /// Set packet header fields from a MediaPacket.
-    pub fn packet(mut self, pkt: &wzp_proto::MediaPacket) -> Self {
-        self.seq = Some(pkt.header.seq);
-        self.codec = Some(format!("{:?}", pkt.header.codec_id));
-        self.fec_block = Some(pkt.header.fec_block);
-        self.fec_sym = Some(pkt.header.fec_symbol);
-        self.repair = Some(pkt.header.is_repair);
-        self.len = Some(pkt.payload.len());
-        self
-    }
-    /// Set seq only (when full packet not available).
-    pub fn seq(mut self, seq: u16) -> Self { self.seq = Some(seq); self }
-    /// Set payload length.
-    pub fn len(mut self, len: usize) -> Self { self.len = Some(len); self }
-    /// Set recipient count.
-    pub fn to_count(mut self, n: usize) -> Self { self.to_count = Some(n); self }
-    /// Set peer label.
-    pub fn peer(mut self, peer: &str) -> Self { self.peer = Some(peer.to_string()); self }
-    /// Set drop reason.
-    pub fn reason(mut self, reason: &str) -> Self { self.reason = Some(reason.to_string()); self }
-    /// Set presence action.
-    pub fn action(mut self, action: &str) -> Self { self.action = Some(action.to_string()); self }
-    /// Set participant count.
-    pub fn participants(mut self, n: usize) -> Self { self.participants = Some(n); self }
-}
-
-/// Handle for emitting events. Cheap to clone.
-#[derive(Clone)]
-pub struct EventLog {
-    tx: mpsc::UnboundedSender<Event>,
-}
-
-impl EventLog {
-    /// Emit an event (non-blocking, drops if channel is full).
-    pub fn emit(&self, event: Event) {
-        let _ = self.tx.send(event);
-    }
-}
-
-/// No-op event log for when `--event-log` is not set.
-/// All methods are no-ops that compile to nothing.
-#[derive(Clone)]
-pub struct NoopEventLog;
-
-/// Unified event log handle — either real or no-op.
-#[derive(Clone)]
-pub enum EventLogger {
-    Active(EventLog),
-    Noop,
-}
-
-impl EventLogger {
-    pub fn emit(&self, event: Event) {
-        if let EventLogger::Active(log) = self {
-            log.emit(event);
-        }
-    }
-
-    pub fn is_active(&self) -> bool {
-        matches!(self, EventLogger::Active(_))
-    }
-}
-
-/// Start the event log writer. Returns an `EventLogger` handle.
-pub fn start_event_log(path: Option<PathBuf>) -> EventLogger {
-    match path {
-        Some(path) => {
-            let (tx, rx) = mpsc::unbounded_channel();
-            tokio::spawn(writer_task(path, rx));
-            info!("event log enabled");
-            EventLogger::Active(EventLog { tx })
-        }
-        None => EventLogger::Noop,
-    }
-}
-
-/// Background task that writes events to a JSONL file.
-async fn writer_task(path: PathBuf, mut rx: mpsc::UnboundedReceiver<Event>) {
-    use tokio::io::AsyncWriteExt;
-
-    let file = match tokio::fs::File::create(&path).await {
-        Ok(f) => f,
-        Err(e) => {
-            error!("failed to create event log {}: {e}", path.display());
-            return;
-        }
-    };
-    let mut writer = tokio::io::BufWriter::new(file);
-    let mut count: u64 = 0;
-
-    while let Some(event) = rx.recv().await {
-        match serde_json::to_string(&event) {
-            Ok(json) => {
-                if writer.write_all(json.as_bytes()).await.is_err() { break; }
-                if writer.write_all(b"\n").await.is_err() { break; }
-                count += 1;
-                // Flush every 100 events
-                if count % 100 == 0 {
-                    let _ = writer.flush().await;
-                }
-            }
-            Err(e) => {
-                error!("event log serialize error: {e}");
-            }
-        }
-    }
-
-    let _ = writer.flush().await;
-    info!(events = count, "event log closed");
-}

crates/wzp-relay/src/federation.rs

@@ -1,976 +0,0 @@
-//! Relay federation — global room routing between peer relays.
-//!
-//! Each relay maintains a forwarding table per global room. When a local participant
-//! sends media in a global room, it's forwarded to all peer relays that have the room
-//! active. Incoming federated media is delivered to local participants and optionally
-//! forwarded to other active peers (multi-hop).
-
-use std::collections::{HashMap, HashSet};
-use std::net::SocketAddr;
-use std::sync::Arc;
-use std::time::{Duration, Instant};
-
-use bytes::Bytes;
-use sha2::{Sha256, Digest};
-use tokio::sync::Mutex;
-use tracing::{error, info, warn};
-
-use wzp_proto::{MediaTransport, SignalMessage};
-use wzp_transport::QuinnTransport;
-
-use crate::config::{PeerConfig, TrustedConfig};
-use crate::event_log::{Event, EventLogger};
-use crate::room::{self, FederationMediaOut, RoomEvent, RoomManager};
-
-/// Compute 8-byte room hash for federation datagram tagging.
-pub fn room_hash(room_name: &str) -> [u8; 8] {
-    let h = Sha256::digest(room_name.as_bytes());
-    let mut out = [0u8; 8];
-    out.copy_from_slice(&h[..8]);
-    out
-}
-
-/// Normalize a fingerprint string (remove colons, lowercase).
-fn normalize_fp(fp: &str) -> String {
-    fp.replace(':', "").to_lowercase()
-}
-
-/// Time-based dedup filter for federation datagrams.
-/// Tracks recently seen packets and expires entries older than 2 seconds.
-/// This prevents duplicate delivery when the same packet arrives via
-/// multiple federation paths, while allowing new senders that happen to
-/// reuse the same seq numbers.
-struct Deduplicator {
-    /// Recently seen packet keys with insertion time.
-    entries: HashMap<u64, Instant>,
-    /// Expiry duration.
-    ttl: Duration,
-}
-
-impl Deduplicator {
-    fn new(_capacity: usize) -> Self {
-        Self {
-            entries: HashMap::with_capacity(512),
-            ttl: Duration::from_secs(2),
-        }
-    }
-
-    /// Returns true if this packet is a duplicate (already seen within TTL).
-    fn is_dup(&mut self, room_hash: &[u8; 8], seq: u16, extra: u64) -> bool {
-        let key = u64::from_be_bytes(*room_hash) ^ (seq as u64) ^ extra;
-        let now = Instant::now();
-
-        // Periodic cleanup (every ~256 packets)
-        if self.entries.len() > 256 {
-            self.entries.retain(|_, ts| now.duration_since(*ts) < self.ttl);
-        }
-
-        if let Some(ts) = self.entries.get(&key) {
-            if now.duration_since(*ts) < self.ttl {
-                return true; // seen recently — duplicate
-            }
-        }
-        self.entries.insert(key, now);
-        false
-    }
-}
-
-/// Per-room token bucket rate limiter for federation forwarding.
-struct RateLimiter {
-    /// Max packets per second per room.
-    max_pps: u32,
-    /// Tokens remaining in current window.
-    tokens: u32,
-    /// When the current window started.
-    window_start: Instant,
-}
-
-impl RateLimiter {
-    fn new(max_pps: u32) -> Self {
-        Self {
-            max_pps,
-            tokens: max_pps,
-            window_start: Instant::now(),
-        }
-    }
-
-    /// Returns true if the packet should be allowed through.
-    fn allow(&mut self) -> bool {
-        let elapsed = self.window_start.elapsed();
-        if elapsed >= Duration::from_secs(1) {
-            self.tokens = self.max_pps;
-            self.window_start = Instant::now();
-        }
-        if self.tokens > 0 {
-            self.tokens -= 1;
-            true
-        } else {
-            false
-        }
-    }
-}
-
-/// Active link to a peer relay.
-struct PeerLink {
-    transport: Arc<QuinnTransport>,
-    label: String,
-    /// Global rooms that this peer has reported as active.
-    active_rooms: HashSet<String>,
-    /// Remote participants per room (for federated presence in RoomUpdate).
-    remote_participants: HashMap<String, Vec<wzp_proto::packet::RoomParticipant>>,
-    /// Last time we received any data (signal or media) from this peer.
-    last_seen: Instant,
-}
-
-/// Max federation packets per second per room (0 = unlimited).
-const FEDERATION_RATE_LIMIT_PPS: u32 = 500;
-/// Dedup window size (number of recent packets to remember).
-const DEDUP_WINDOW_SIZE: usize = 4096;
-/// Remote participants are considered stale after this duration with no updates.
-const REMOTE_PARTICIPANT_STALE_SECS: u64 = 15;
-
-/// Manages federation connections and global room forwarding.
-pub struct FederationManager {
-    peers: Vec<PeerConfig>,
-    trusted: Vec<TrustedConfig>,
-    global_rooms: HashSet<String>,
-    room_mgr: Arc<Mutex<RoomManager>>,
-    endpoint: quinn::Endpoint,
-    local_tls_fp: String,
-    metrics: Arc<crate::metrics::RelayMetrics>,
-    /// Active peer connections, keyed by normalized fingerprint.
-    peer_links: Arc<Mutex<HashMap<String, PeerLink>>>,
-    /// Dedup filter for incoming federation datagrams.
-    dedup: Mutex<Deduplicator>,
-    /// JSONL event log for protocol analysis.
-    event_log: EventLogger,
-    /// Per-room rate limiters for inbound federation media.
-    rate_limiters: Mutex<HashMap<String, RateLimiter>>,
-}
-
-impl FederationManager {
-    pub fn new(
-        peers: Vec<PeerConfig>,
-        trusted: Vec<TrustedConfig>,
-        global_rooms: HashSet<String>,
-        room_mgr: Arc<Mutex<RoomManager>>,
-        endpoint: quinn::Endpoint,
-        local_tls_fp: String,
-        metrics: Arc<crate::metrics::RelayMetrics>,
-        event_log: EventLogger,
-    ) -> Self {
-        Self {
-            peers,
-            trusted,
-            global_rooms,
-            room_mgr,
-            endpoint,
-            local_tls_fp,
-            metrics,
-            peer_links: Arc::new(Mutex::new(HashMap::new())),
-            dedup: Mutex::new(Deduplicator::new(DEDUP_WINDOW_SIZE)),
-            event_log,
-            rate_limiters: Mutex::new(HashMap::new()),
-        }
-    }
-
-    /// Check if a room name (which may be hashed) is a global room.
-    pub fn is_global_room(&self, room: &str) -> bool {
-        self.resolve_global_room(room).is_some()
-    }
-
-    /// Resolve a room name (raw or hashed) to the canonical global room name.
-    /// Returns the configured global room name if it matches.
-    pub fn resolve_global_room(&self, room: &str) -> Option<&str> {
-        // Direct match (raw room name, e.g. Android clients)
-        if self.global_rooms.contains(room) {
-            return Some(self.global_rooms.iter().find(|n| n.as_str() == room).unwrap());
-        }
-        // Hashed match (desktop clients hash room names for SNI privacy)
-        self.global_rooms.iter().find(|name| {
-            wzp_crypto::hash_room_name(name) == room
-        }).map(|s| s.as_str())
-    }
-
-    /// Get the canonical federation room hash for a room.
-    /// Always uses the configured global room name, not the client-provided name.
-    pub fn global_room_hash(&self, room: &str) -> [u8; 8] {
-        if let Some(canonical) = self.resolve_global_room(room) {
-            room_hash(canonical)
-        } else {
-            room_hash(room)
-        }
-    }
-
-    /// Start federation — spawns connection loops + event dispatcher.
-    pub async fn run(self: Arc<Self>) {
-        if self.peers.is_empty() && self.global_rooms.is_empty() {
-            return;
-        }
-        info!(
-            peers = self.peers.len(),
-            global_rooms = self.global_rooms.len(),
-            "federation starting"
-        );
-
-        let mut handles = Vec::new();
-
-        // Per-peer outbound connection loops
-        for peer in &self.peers {
-            let this = self.clone();
-            let peer = peer.clone();
-            handles.push(tokio::spawn(async move {
-                run_peer_loop(this, peer).await;
-            }));
-        }
-
-        // Room event dispatcher
-        let room_events = {
-            let mgr = self.room_mgr.lock().await;
-            mgr.subscribe_events()
-        };
-        let this = self.clone();
-        handles.push(tokio::spawn(async move {
-            run_room_event_dispatcher(this, room_events).await;
-        }));
-
-        // Stale presence sweeper — purges remote participants from dead peers
-        let this = self.clone();
-        handles.push(tokio::spawn(async move {
-            run_stale_presence_sweeper(this).await;
-        }));
-
-        for h in handles {
-            let _ = h.await;
-        }
-    }
-
-    /// Handle an inbound federation connection from a recognized peer.
-    pub async fn handle_inbound(
-        self: &Arc<Self>,
-        transport: Arc<QuinnTransport>,
-        peer_config: PeerConfig,
-    ) {
-        let peer_fp = normalize_fp(&peer_config.fingerprint);
-        let label = peer_config.label.unwrap_or_else(|| peer_config.url.clone());
-        info!(peer = %label, "inbound federation link active");
-        if let Err(e) = run_federation_link(self.clone(), transport, peer_fp, label.clone()).await {
-            warn!(peer = %label, "inbound federation link ended: {e}");
-        }
-    }
-
-    /// Get all remote participants for a room from all peer links.
-    /// Deduplicates by fingerprint (same participant may appear via multiple links).
-    pub async fn get_remote_participants(&self, room: &str) -> Vec<wzp_proto::packet::RoomParticipant> {
-        let canonical = self.resolve_global_room(room);
-        let links = self.peer_links.lock().await;
-        let mut result = Vec::new();
-        for link in links.values() {
-            // Check canonical name
-            if let Some(c) = canonical {
-                if let Some(remote) = link.remote_participants.get(c) {
-                    result.extend(remote.iter().cloned());
-                }
-                // Also check raw room name, but only if different from canonical
-                if c != room {
-                    if let Some(remote) = link.remote_participants.get(room) {
-                        result.extend(remote.iter().cloned());
-                    }
-                }
-            } else {
-                if let Some(remote) = link.remote_participants.get(room) {
-                    result.extend(remote.iter().cloned());
-                }
-            }
-        }
-        // Deduplicate by fingerprint
-        let mut seen = HashSet::new();
-        result.retain(|p| seen.insert(p.fingerprint.clone()));
-        result
-    }
-
-    /// Forward locally-generated media to all connected peers.
-    /// For locally-originated media, we send to ALL peers (they decide whether to deliver).
-    /// For forwarded media (multi-hop), handle_datagram filters by active_rooms.
-    ///
-    /// `_room_name` is kept in the signature for caller-site symmetry with
-    /// the other room-tagged helpers and for future per-room-name logging
-    /// or rate limiting; the body currently forwards on `room_hash` alone
-    /// because that's what the wire format carries.
-    pub async fn forward_to_peers(&self, _room_name: &str, room_hash: &[u8; 8], media_data: &Bytes) {
-        let links = self.peer_links.lock().await;
-        if links.is_empty() {
-            return;
-        }
-        for (_fp, link) in links.iter() {
-            let mut tagged = Vec::with_capacity(8 + media_data.len());
-            tagged.extend_from_slice(room_hash);
-            tagged.extend_from_slice(media_data);
-            match link.transport.send_raw_datagram(&tagged) {
-                Ok(()) => {
-                    self.metrics.federation_packets_forwarded
-                        .with_label_values(&[&link.label, "out"]).inc();
-                }
-                Err(e) => warn!(peer = %link.label, "federation send error: {e}"),
-            }
-        }
-    }
-
-    // ── Trust verification (kept from previous implementation) ──
-
-    pub fn find_peer_by_fingerprint(&self, fp: &str) -> Option<&PeerConfig> {
-        self.peers.iter().find(|p| normalize_fp(&p.fingerprint) == normalize_fp(fp))
-    }
-
-    pub fn find_peer_by_addr(&self, addr: SocketAddr) -> Option<&PeerConfig> {
-        let addr_ip = addr.ip();
-        self.peers.iter().find(|p| {
-            p.url.parse::<SocketAddr>()
-                .map(|sa| sa.ip() == addr_ip)
-                .unwrap_or(false)
-        })
-    }
-
-    pub fn find_trusted_by_fingerprint(&self, fp: &str) -> Option<&TrustedConfig> {
-        self.trusted.iter().find(|t| normalize_fp(&t.fingerprint) == normalize_fp(fp))
-    }
-
-    pub fn check_inbound_trust(&self, addr: SocketAddr, hello_fp: &str) -> Option<String> {
-        if let Some(peer) = self.find_peer_by_addr(addr) {
-            return Some(peer.label.clone().unwrap_or_else(|| peer.url.clone()));
-        }
-        if let Some(trusted) = self.find_trusted_by_fingerprint(hello_fp) {
-            return Some(trusted.label.clone().unwrap_or_else(|| hello_fp[..16].to_string()));
-        }
-        None
-    }
-}
-
-// ── Outbound media egress task ──
-
-/// Drains the federation media channel and forwards to active peers.
-pub async fn run_federation_media_egress(
-    fm: Arc<FederationManager>,
-    mut rx: tokio::sync::mpsc::Receiver<FederationMediaOut>,
-) {
-    let mut count: u64 = 0;
-    while let Some(out) = rx.recv().await {
-        count += 1;
-        if count == 1 || count % 250 == 0 {
-            info!(room = %out.room_name, count, "federation egress: forwarding media");
-        }
-        fm.forward_to_peers(&out.room_name, &out.room_hash, &out.data).await;
-    }
-    info!(total = count, "federation egress task ended");
-}
-
-// ── Room event dispatcher ──
-
-/// Watches RoomManager events and sends GlobalRoomActive/Inactive to peers.
-async fn run_room_event_dispatcher(
-    fm: Arc<FederationManager>,
-    mut events: tokio::sync::broadcast::Receiver<RoomEvent>,
-) {
-    loop {
-        match events.recv().await {
-            Ok(RoomEvent::LocalJoin { room }) => {
-                if fm.is_global_room(&room) {
-                    let participants = {
-                        let mgr = fm.room_mgr.lock().await;
-                        mgr.local_participant_list(&room)
-                    };
-                    info!(room = %room, count = participants.len(), "global room now active, announcing to peers");
-                    let msg = SignalMessage::GlobalRoomActive { room, participants };
-                    let links = fm.peer_links.lock().await;
-                    for link in links.values() {
-                        let _ = link.transport.send_signal(&msg).await;
-                    }
-                }
-            }
-            Ok(RoomEvent::LocalLeave { room }) => {
-                if fm.is_global_room(&room) {
-                    info!(room = %room, "global room now inactive, announcing to peers");
-                    let msg = SignalMessage::GlobalRoomInactive { room };
-                    let links = fm.peer_links.lock().await;
-                    for link in links.values() {
-                        let _ = link.transport.send_signal(&msg).await;
-                    }
-                }
-            }
-            Err(tokio::sync::broadcast::error::RecvError::Lagged(n)) => {
-                warn!(missed = n, "room event receiver lagged");
-            }
-            Err(tokio::sync::broadcast::error::RecvError::Closed) => break,
-        }
-    }
-}
-
-// ── Stale presence sweeper ──
-
-/// Periodically checks for stale remote participants and purges them.
-/// This handles the case where a peer link dies without sending GlobalRoomInactive
-/// (e.g., QUIC timeout, network partition, crash).
-async fn run_stale_presence_sweeper(fm: Arc<FederationManager>) {
-    let mut interval = tokio::time::interval(Duration::from_secs(5));
-    loop {
-        interval.tick().await;
-        let stale_threshold = Duration::from_secs(REMOTE_PARTICIPANT_STALE_SECS);
-
-        // Find peers with stale remote_participants whose link is also gone or idle
-        let stale_rooms: Vec<(String, String)> = {
-            let links = fm.peer_links.lock().await;
-            let mut stale = Vec::new();
-            for (fp, link) in links.iter() {
-                if link.last_seen.elapsed() > stale_threshold && !link.remote_participants.is_empty() {
-                    for room in link.remote_participants.keys() {
-                        stale.push((fp.clone(), room.clone()));
-                    }
-                }
-            }
-            stale
-        };
-
-        if stale_rooms.is_empty() {
-            continue;
-        }
-
-        // Purge stale entries and collect affected rooms
-        let mut affected_rooms = HashSet::new();
-        {
-            let mut links = fm.peer_links.lock().await;
-            for (fp, room) in &stale_rooms {
-                if let Some(link) = links.get_mut(fp.as_str()) {
-                    if link.last_seen.elapsed() > stale_threshold {
-                        info!(peer = %link.label, room = %room, "purging stale remote participants (no data for {}s)", link.last_seen.elapsed().as_secs());
-                        link.remote_participants.remove(room);
-                        link.active_rooms.remove(room);
-                        affected_rooms.insert(room.clone());
-                    }
-                }
-            }
-        }
-
-        // Broadcast updated RoomUpdate for affected rooms
-        for room in &affected_rooms {
-            let mgr = fm.room_mgr.lock().await;
-            for local_room in mgr.active_rooms() {
-                if fm.resolve_global_room(&local_room) == fm.resolve_global_room(room) {
-                    let mut all_participants = mgr.local_participant_list(&local_room);
-                    let remote = fm.get_remote_participants(&local_room).await;
-                    all_participants.extend(remote);
-                    let mut seen = HashSet::new();
-                    all_participants.retain(|p| seen.insert(p.fingerprint.clone()));
-                    let update = SignalMessage::RoomUpdate {
-                        count: all_participants.len() as u32,
-                        participants: all_participants,
-                    };
-                    let senders = mgr.local_senders(&local_room);
-                    drop(mgr);
-                    room::broadcast_signal(&senders, &update).await;
-                    info!(room = %room, "swept stale presence — broadcast updated RoomUpdate");
-                    break;
-                }
-            }
-        }
-    }
-}
-
-// ── Peer connection management ──
-
-/// Persistent connection loop for one peer — reconnects with backoff.
-async fn run_peer_loop(fm: Arc<FederationManager>, peer: PeerConfig) {
-    let mut backoff = Duration::from_secs(5);
-    loop {
-        info!(peer_url = %peer.url, label = ?peer.label, "federation: connecting to peer...");
-        match connect_to_peer(&fm, &peer).await {
-            Ok(transport) => {
-                backoff = Duration::from_secs(5);
-                let peer_fp = normalize_fp(&peer.fingerprint);
-                let label = peer.label.clone().unwrap_or_else(|| peer.url.clone());
-                if let Err(e) = run_federation_link(fm.clone(), transport, peer_fp, label).await {
-                    warn!(peer_url = %peer.url, "federation link ended: {e}");
-                }
-            }
-            Err(e) => {
-                warn!(peer_url = %peer.url, backoff_s = backoff.as_secs(), "federation connect failed: {e}");
-            }
-        }
-        tokio::time::sleep(backoff).await;
-        backoff = (backoff * 2).min(Duration::from_secs(300));
-    }
-}
-
-/// Connect to a peer relay and send hello.
-async fn connect_to_peer(fm: &FederationManager, peer: &PeerConfig) -> Result<Arc<QuinnTransport>, anyhow::Error> {
-    let addr: SocketAddr = peer.url.parse()?;
-    let client_cfg = wzp_transport::client_config();
-    let conn = wzp_transport::connect(&fm.endpoint, addr, "_federation", client_cfg).await?;
-    let transport = Arc::new(QuinnTransport::new(conn));
-
-    // Send hello with our TLS fingerprint
-    let hello = SignalMessage::FederationHello {
-        tls_fingerprint: fm.local_tls_fp.clone(),
-    };
-    transport.send_signal(&hello).await
-        .map_err(|e| anyhow::anyhow!("federation hello send failed: {e}"))?;
-
-    info!(peer_url = %peer.url, label = ?peer.label, "federation: connected (hello sent)");
-    Ok(transport)
-}
-
-// ── Federation link (runs on a single QUIC connection) ──
-
-/// Run the federation link: exchange global room state and forward media.
-async fn run_federation_link(
-    fm: Arc<FederationManager>,
-    transport: Arc<QuinnTransport>,
-    peer_fp: String,
-    peer_label: String,
-) -> Result<(), anyhow::Error> {
-    // Register peer link + metrics
-    fm.metrics.federation_peer_status.with_label_values(&[&peer_label]).set(1);
-    {
-        let mut links = fm.peer_links.lock().await;
-        links.insert(peer_fp.clone(), PeerLink {
-            transport: transport.clone(),
-            label: peer_label.clone(),
-            active_rooms: HashSet::new(),
-            remote_participants: HashMap::new(),
-            last_seen: Instant::now(),
-        });
-    }
-
-    // Announce our currently active global rooms to this new peer
-    // Collect all announcements first, then send (avoid holding locks across await)
-    let announcements = {
-        let mgr = fm.room_mgr.lock().await;
-        let active = mgr.active_rooms();
-        let mut msgs = Vec::new();
-
-        // Local rooms
-        for room_name in &active {
-            if fm.is_global_room(room_name) {
-                let participants = mgr.local_participant_list(room_name);
-                info!(peer = %peer_label, room = %room_name, participants = participants.len(), "announcing local global room to new peer");
-                msgs.push(SignalMessage::GlobalRoomActive { room: room_name.clone(), participants });
-            }
-        }
-
-        // Remote rooms from OTHER peers (for multi-hop propagation)
-        let links = fm.peer_links.lock().await;
-        for (fp, link) in links.iter() {
-            if fp != &peer_fp {
-                for (room, participants) in &link.remote_participants {
-                    if fm.is_global_room(room) {
-                        info!(peer = %peer_label, room = %room, via = %link.label, "propagating remote room to new peer");
-                        msgs.push(SignalMessage::GlobalRoomActive {
-                            room: room.clone(),
-                            participants: participants.clone(),
-                        });
-                    }
-                }
-            }
-        }
-        msgs
-    };
-    for msg in &announcements {
-        let _ = transport.send_signal(msg).await;
-    }
-
-    // Three concurrent tasks: signal recv + media recv + RTT monitor
-    let signal_transport = transport.clone();
-    let media_transport = transport.clone();
-    let rtt_transport = transport.clone();
-    let fm_signal = fm.clone();
-    let fm_media = fm.clone();
-    let fm_rtt = fm.clone();
-    let peer_fp_signal = peer_fp.clone();
-    let peer_fp_media = peer_fp.clone();
-    let label_signal = peer_label.clone();
-    let label_rtt = peer_label.clone();
-
-    let signal_task = async move {
-        loop {
-            match signal_transport.recv_signal().await {
-                Ok(Some(msg)) => {
-                    handle_signal(&fm_signal, &peer_fp_signal, &label_signal, msg).await;
-                }
-                Ok(None) => break,
-                Err(e) => {
-                    error!(peer = %label_signal, "federation signal error: {e}");
-                    break;
-                }
-            }
-        }
-    };
-
-    let peer_label_media = peer_label.clone();
-    let media_task = async move {
-        let mut media_count: u64 = 0;
-        loop {
-            match media_transport.connection().read_datagram().await {
-                Ok(data) => {
-                    media_count += 1;
-                    if media_count == 1 || media_count % 250 == 0 {
-                        info!(peer = %peer_label_media, media_count, len = data.len(), "federation: received datagram");
-                    }
-                    handle_datagram(&fm_media, &peer_fp_media, data).await;
-                }
-                Err(e) => {
-                    info!(peer = %peer_label_media, "federation media task ended: {e}");
-                    break;
-                }
-            }
-        }
-    };
-
-    // RTT monitor: periodically sample QUIC RTT for this peer and push it
-    // into the `wzp_federation_peer_rtt_ms` gauge. The gauge is registered
-    // in metrics.rs but previously never received any samples — the task
-    // computed rtt_ms and dropped it on the floor, leaving the Grafana
-    // panel blank. Fixed as part of the workspace warning sweep.
-    let rtt_task = async move {
-        loop {
-            tokio::time::sleep(Duration::from_secs(5)).await;
-            let rtt_ms = rtt_transport.connection().stats().path.rtt.as_millis() as f64;
-            fm_rtt
-                .metrics
-                .federation_peer_rtt_ms
-                .with_label_values(&[&label_rtt])
-                .set(rtt_ms);
-        }
-    };
-
-    tokio::select! {
-        _ = signal_task => {}
-        _ = media_task => {}
-        _ = rtt_task => {}
-    }
-
-    // Cleanup: remove peer link + metrics
-    fm.metrics.federation_peer_status.with_label_values(&[&peer_label]).set(0);
-    {
-        let mut links = fm.peer_links.lock().await;
-        links.remove(&peer_fp);
-    }
-    info!(peer = %peer_label, "federation link ended");
-
-    Ok(())
-}
-
-/// Handle an incoming federation signal.
-async fn handle_signal(
-    fm: &Arc<FederationManager>,
-    peer_fp: &str,
-    peer_label: &str,
-    msg: SignalMessage,
-) {
-    // Update last_seen for this peer
-    {
-        let mut links = fm.peer_links.lock().await;
-        if let Some(link) = links.get_mut(peer_fp) {
-            link.last_seen = Instant::now();
-        }
-    }
-
-    match msg {
-        SignalMessage::GlobalRoomActive { room, participants } => {
-            if fm.is_global_room(&room) {
-                info!(peer = %peer_label, room = %room, remote_participants = participants.len(), "peer has global room active");
-                let mut links = fm.peer_links.lock().await;
-                if let Some(link) = links.get_mut(peer_fp) {
-                    link.active_rooms.insert(room.clone());
-                }
-                // Update active rooms metric
-                let total: usize = links.values().map(|l| l.active_rooms.len()).sum();
-                fm.metrics.federation_active_rooms.set(total as i64);
-                if let Some(link) = links.get_mut(peer_fp) {
-                    // Tag remote participants with their relay label
-                    let tagged: Vec<_> = participants.iter().map(|p| {
-                        let mut tagged = p.clone();
-                        if tagged.relay_label.is_none() {
-                            tagged.relay_label = Some(link.label.clone());
-                        }
-                        tagged
-                    }).collect();
-                    link.remote_participants.insert(room.clone(), tagged);
-                }
-                // Propagate to other peers (with relay labels preserved)
-                let tagged_for_propagation = if let Some(link) = links.get(peer_fp) {
-                    let label = link.label.clone();
-                    participants.iter().map(|p| {
-                        let mut t = p.clone();
-                        if t.relay_label.is_none() {
-                            t.relay_label = Some(label.clone());
-                        }
-                        t
-                    }).collect::<Vec<_>>()
-                } else {
-                    participants.clone()
-                };
-                for (fp, link) in links.iter() {
-                    if fp != peer_fp {
-                        let _ = link.transport.send_signal(&SignalMessage::GlobalRoomActive {
-                            room: room.clone(),
-                            participants: tagged_for_propagation.clone(),
-                        }).await;
-                    }
-                }
-                drop(links);
-
-                // Broadcast updated RoomUpdate to local clients in this room
-                // Find the local room name (may be hashed or raw)
-                let mgr = fm.room_mgr.lock().await;
-                for local_room in mgr.active_rooms() {
-                    if fm.is_global_room(&local_room) && fm.resolve_global_room(&local_room) == fm.resolve_global_room(&room) {
-                        // Build merged participant list: local + all remote (deduped)
-                        let mut all_participants = mgr.local_participant_list(&local_room);
-                        let links = fm.peer_links.lock().await;
-                        for link in links.values() {
-                            if let Some(canonical) = fm.resolve_global_room(&local_room) {
-                                if let Some(remote) = link.remote_participants.get(canonical) {
-                                    all_participants.extend(remote.iter().cloned());
-                                }
-                                // Also check raw room name, but only if different from canonical
-                                if canonical != local_room {
-                                    if let Some(remote) = link.remote_participants.get(&local_room) {
-                                        all_participants.extend(remote.iter().cloned());
-                                    }
-                                }
-                            }
-                        }
-                        // Deduplicate by fingerprint
-                        let mut seen = HashSet::new();
-                        all_participants.retain(|p| seen.insert(p.fingerprint.clone()));
-                        let update = SignalMessage::RoomUpdate {
-                            count: all_participants.len() as u32,
-                            participants: all_participants,
-                        };
-                        let senders = mgr.local_senders(&local_room);
-                        drop(links);
-                        drop(mgr);
-                        room::broadcast_signal(&senders, &update).await;
-                        break;
-                    }
-                }
-            }
-        }
-        SignalMessage::GlobalRoomInactive { room } => {
-            info!(peer = %peer_label, room = %room, "peer global room now inactive");
-            let mut links = fm.peer_links.lock().await;
-            if let Some(link) = links.get_mut(peer_fp) {
-                link.active_rooms.remove(&room);
-                // Clear remote participants for this peer+room
-                link.remote_participants.remove(&room);
-                // Also try canonical name
-                if let Some(canonical) = fm.resolve_global_room(&room) {
-                    link.remote_participants.remove(canonical);
-                }
-            }
-
-            // Update active rooms metric
-            let total: usize = links.values().map(|l| l.active_rooms.len()).sum();
-            fm.metrics.federation_active_rooms.set(total as i64);
-
-            // Build remaining remote participants (from all peers except the one going inactive)
-            let remaining_remote: Vec<wzp_proto::packet::RoomParticipant> = {
-                let canonical = fm.resolve_global_room(&room);
-                let mut result = Vec::new();
-                for (fp, link) in links.iter() {
-                    if fp == peer_fp { continue; }
-                    if let Some(c) = canonical {
-                        if let Some(remote) = link.remote_participants.get(c) {
-                            result.extend(remote.iter().cloned());
-                        }
-                    }
-                }
-                let mut seen = HashSet::new();
-                result.retain(|p| seen.insert(p.fingerprint.clone()));
-                result
-            };
-
-            // Propagate to other peers: send updated GlobalRoomActive with revised list,
-            // or GlobalRoomInactive if no participants remain anywhere
-            let local_active = {
-                let mgr = fm.room_mgr.lock().await;
-                mgr.active_rooms().iter().any(|r| fm.resolve_global_room(r) == fm.resolve_global_room(&room))
-            };
-            let has_remaining = !remaining_remote.is_empty() || local_active;
-
-            // Collect peer transports to send to (avoid holding lock across await)
-            let peer_sends: Vec<_> = links.iter()
-                .filter(|(fp, _)| *fp != peer_fp)
-                .map(|(_, link)| link.transport.clone())
-                .collect();
-            drop(links);
-
-            if has_remaining {
-                // Send updated participant list to other peers
-                let mut updated_participants = remaining_remote.clone();
-                if local_active {
-                    let mgr = fm.room_mgr.lock().await;
-                    for local_room in mgr.active_rooms() {
-                        if fm.resolve_global_room(&local_room) == fm.resolve_global_room(&room) {
-                            updated_participants.extend(mgr.local_participant_list(&local_room));
-                            break;
-                        }
-                    }
-                }
-                let msg = SignalMessage::GlobalRoomActive {
-                    room: room.clone(),
-                    participants: updated_participants,
-                };
-                for transport in &peer_sends {
-                    let _ = transport.send_signal(&msg).await;
-                }
-            } else {
-                // No participants left anywhere — propagate inactive
-                let msg = SignalMessage::GlobalRoomInactive { room: room.clone() };
-                for transport in &peer_sends {
-                    let _ = transport.send_signal(&msg).await;
-                }
-            }
-
-            // Broadcast updated RoomUpdate to local clients (remote participant removed)
-            let mgr = fm.room_mgr.lock().await;
-            for local_room in mgr.active_rooms() {
-                if fm.is_global_room(&local_room) && fm.resolve_global_room(&local_room) == fm.resolve_global_room(&room) {
-                    let mut all_participants = mgr.local_participant_list(&local_room);
-                    all_participants.extend(remaining_remote.iter().cloned());
-                    // Deduplicate by fingerprint
-                    let mut seen = HashSet::new();
-                    all_participants.retain(|p| seen.insert(p.fingerprint.clone()));
-                    let update = SignalMessage::RoomUpdate {
-                        count: all_participants.len() as u32,
-                        participants: all_participants,
-                    };
-                    let senders = mgr.local_senders(&local_room);
-                    drop(mgr);
-                    room::broadcast_signal(&senders, &update).await;
-                    info!(room = %room, "broadcast updated presence (remote participant removed)");
-                    break;
-                }
-            }
-        }
-        _ => {} // ignore other signals
-    }
-}
-
-/// Handle an incoming federation datagram (room-hash-tagged media).
-async fn handle_datagram(
-    fm: &Arc<FederationManager>,
-    source_peer_fp: &str,
-    data: Bytes,
-) {
-    if data.len() < 12 { return; } // 8-byte hash + min packet
-
-    let mut rh = [0u8; 8];
-    rh.copy_from_slice(&data[..8]);
-    let media_bytes = data.slice(8..);
-
-    let pkt = match wzp_proto::MediaPacket::from_bytes(media_bytes.clone()) {
-        Some(pkt) => pkt,
-        None => {
-            fm.event_log.emit(Event::new("federation_ingress_malformed").len(data.len()));
-            return;
-        }
-    };
-
-    // Event log: federation ingress
-    let peer_label = {
-        let links = fm.peer_links.lock().await;
-        links.get(source_peer_fp).map(|l| l.label.clone()).unwrap_or_default()
-    };
-    fm.event_log.emit(Event::new("federation_ingress").packet(&pkt).peer(&peer_label));
-
-    // Count inbound federation packet + update last_seen
-    fm.metrics.federation_packets_forwarded
-        .with_label_values(&[source_peer_fp, "in"]).inc();
-    {
-        let mut links = fm.peer_links.lock().await;
-        if let Some(link) = links.get_mut(source_peer_fp) {
-            link.last_seen = Instant::now();
-        }
-    }
-
-    // Dedup: drop packets we've already seen (multi-path duplicates).
-    // Key uses a hash of the actual payload bytes — unique per Opus frame,
-    // so different senders with the same seq/timestamp never collide.
-    let payload_hash = {
-        let mut h = 0u64;
-        for (i, &b) in media_bytes.iter().take(16).enumerate() {
-            h ^= (b as u64) << ((i % 8) * 8);
-        }
-        h
-    };
-    {
-        let mut dedup = fm.dedup.lock().await;
-        if dedup.is_dup(&rh, pkt.header.seq, payload_hash) {
-            fm.event_log.emit(Event::new("dedup_drop").seq(pkt.header.seq).peer(&peer_label));
-            return;
-        }
-    }
-
-    // Find room by hash — check local rooms AND global room config
-    let room_name = {
-        let mgr = fm.room_mgr.lock().await;
-        let active = mgr.active_rooms();
-        // First: check local rooms (has participants)
-        active.iter().find(|r| room_hash(r) == rh).cloned()
-            .or_else(|| active.iter().find(|r| fm.global_room_hash(r) == rh).cloned())
-            // Second: check global room config (hub relay may have no local participants)
-            .or_else(|| {
-                fm.global_rooms.iter().find(|name| room_hash(name) == rh).cloned()
-            })
-    };
-
-    let room_name = match room_name {
-        Some(r) => r,
-        None => {
-            fm.event_log.emit(Event::new("room_not_found").seq(pkt.header.seq).peer(&peer_label));
-            return;
-        }
-    };
-
-    // Rate limit per room
-    if FEDERATION_RATE_LIMIT_PPS > 0 {
-        let mut limiters = fm.rate_limiters.lock().await;
-        let limiter = limiters.entry(room_name.clone())
-            .or_insert_with(|| RateLimiter::new(FEDERATION_RATE_LIMIT_PPS));
-        if !limiter.allow() {
-            fm.event_log.emit(Event::new("rate_limit_drop").room(&room_name).seq(pkt.header.seq));
-            return;
-        }
-    }
-
-    // Deliver to all local participants — forward the raw bytes as-is.
-    // The original sender's MediaPacket is preserved exactly (no re-serialization).
-    let locals = {
-        let mgr = fm.room_mgr.lock().await;
-        mgr.local_senders(&room_name)
-    };
-    for sender in &locals {
-        match sender {
-            room::ParticipantSender::Quic(t) => {
-                if let Err(e) = t.send_raw_datagram(&media_bytes) {
-                    fm.event_log.emit(Event::new("local_deliver_error").room(&room_name).seq(pkt.header.seq).reason(&e.to_string()));
-                    warn!("federation local delivery error: {e}");
-                }
-            }
-            room::ParticipantSender::WebSocket(_) => { let _ = sender.send_raw(&pkt.payload).await; }
-        }
-    }
-    fm.event_log.emit(Event::new("local_deliver").room(&room_name).seq(pkt.header.seq).to_count(locals.len()));
-
-    // Multi-hop: forward to ALL other connected peers (not the source)
-    // Don't filter by active_rooms — the receiving peer decides whether to deliver
-    let links = fm.peer_links.lock().await;
-    for (fp, link) in links.iter() {
-        if fp != source_peer_fp {
-            let mut tagged = Vec::with_capacity(8 + media_bytes.len());
-            tagged.extend_from_slice(&rh);
-            tagged.extend_from_slice(&media_bytes);
-            let _ = link.transport.send_raw_datagram(&tagged);
-        }
-    }
-}

crates/wzp-relay/src/handshake.rs

@@ -78,30 +78,31 @@ pub async fn accept_handshake(
     };
     transport.send_signal(&answer).await?;
 
-    // Derive caller fingerprint: SHA-256(Ed25519 pub)[:16], formatted as xxxx:xxxx:...
+    // Derive caller fingerprint from their identity public key (first 8 bytes as hex)
-    // Must match the format used in signal registration and presence.
+    let caller_fp = caller_identity_pub[..8]
-    let caller_fp = {
+        .iter()
-        use sha2::{Sha256, Digest};
+        .map(|b| format!("{b:02x}"))
-        let hash = Sha256::digest(&caller_identity_pub);
+        .collect::<String>();
-        let fp = wzp_crypto::Fingerprint([
-            hash[0], hash[1], hash[2], hash[3], hash[4], hash[5], hash[6], hash[7],
-            hash[8], hash[9], hash[10], hash[11], hash[12], hash[13], hash[14], hash[15],
-        ]);
-        fp.to_string()
-    };
 
     Ok((session, chosen_profile, caller_fp, caller_alias))
 }
 
 /// Select the best quality profile from those the caller supports.
-///
+fn choose_profile(supported: &[QualityProfile]) -> QualityProfile {
-/// The `_supported` list is currently ignored — we hardcode GOOD (24k) until
+    // Prefer higher-quality profiles. Use GOOD as default if supported list is empty.
-/// studio tiers (32k/48k/64k) have been validated across federation (large
+    if supported.is_empty() {
-/// packets may exceed path MTU and fragment in unpleasant ways). Once that's
+        return QualityProfile::GOOD;
-/// tested, the body should pick the highest supported profile ≤ the relay's
+    }
-/// configured ceiling.
+    // Pick the profile with the highest bitrate.
-fn choose_profile(_supported: &[QualityProfile]) -> QualityProfile {
+    supported
-    QualityProfile::GOOD
+        .iter()
+        .max_by(|a, b| {
+            a.total_bitrate_kbps()
+                .partial_cmp(&b.total_bitrate_kbps())
+                .unwrap_or(std::cmp::Ordering::Equal)
+        })
+        .copied()
+        .unwrap_or(QualityProfile::GOOD)
 }
 
 #[cfg(test)]

crates/wzp-relay/src/lib.rs

@@ -8,11 +8,7 @@
 //! quality transitions.
 
 pub mod auth;
-pub mod call_registry;
 pub mod config;
-pub mod event_log;
-pub mod federation;
-pub mod signal_hub;
 pub mod handshake;
 pub mod metrics;
 pub mod pipeline;

crates/wzp-relay/src/main.rs

@@ -13,9 +13,9 @@ use std::sync::Arc;
 use std::time::Duration;
 
 use tokio::sync::Mutex;
-use tracing::{error, info, warn};
+use tracing::{error, info};
 
-use wzp_proto::{MediaTransport, SignalMessage};
+use wzp_proto::MediaTransport;
 use wzp_relay::config::RelayConfig;
 use wzp_relay::metrics::RelayMetrics;
 use wzp_relay::pipeline::{PipelineConfig, RelayPipeline};
@@ -23,54 +23,12 @@ use wzp_relay::presence::PresenceRegistry;
 use wzp_relay::room::{self, RoomManager};
 use wzp_relay::session_mgr::SessionManager;
 
-/// Parsed CLI result — config + identity path.
+fn parse_args() -> RelayConfig {
-struct CliResult {
+    let mut config = RelayConfig::default();
-    config: RelayConfig,
-    identity_path: Option<String>,
-    config_file: Option<String>,
-    config_needs_create: bool,
-}
-
-fn parse_args() -> CliResult {
     let args: Vec<String> = std::env::args().collect();
-
-    // First pass: extract --config and --identity
-    let mut config_file = None;
-    let mut identity_path = None;
     let mut i = 1;
     while i < args.len() {
         match args[i].as_str() {
-            "--config" | "-c" => { i += 1; config_file = args.get(i).cloned(); }
-            "--identity" | "-i" => { i += 1; identity_path = args.get(i).cloned(); }
-            _ => {}
-        }
-        i += 1;
-    }
-
-    // Track if we need to create the config after identity is known
-    let config_needs_create = config_file.as_ref().map(|p| !std::path::Path::new(p).exists()).unwrap_or(false);
-
-    let mut config = if let Some(ref path) = config_file {
-        if config_needs_create {
-            // Will be re-created with personalized info after identity is loaded
-            RelayConfig::default()
-        } else {
-            wzp_relay::config::load_config(path)
-                .unwrap_or_else(|e| {
-                    eprintln!("failed to load config from {path}: {e}");
-                    std::process::exit(1);
-                })
-        }
-    } else {
-        RelayConfig::default()
-    };
-
-    // CLI flags override config file values
-    let mut i = 1;
-    while i < args.len() {
-        match args[i].as_str() {
-            "--config" | "-c" => { i += 1; } // already handled
-            "--identity" | "-i" => { i += 1; } // already handled
             "--listen" => {
                 i += 1;
                 config.listen_addr = args.get(i).expect("--listen requires an address")
@@ -123,28 +81,6 @@ fn parse_args() -> CliResult {
                     args.get(i).expect("--static-dir requires a directory path").to_string(),
                 );
             }
-            "--global-room" => {
-                i += 1;
-                config.global_rooms.push(wzp_relay::config::GlobalRoomConfig {
-                    name: args.get(i).expect("--global-room requires a room name").to_string(),
-                });
-            }
-            "--debug-tap" => {
-                i += 1;
-                config.debug_tap = Some(
-                    args.get(i).expect("--debug-tap requires a room name (or '*' for all)").to_string(),
-                );
-            }
-            "--event-log" => {
-                i += 1;
-                config.event_log = Some(
-                    args.get(i).expect("--event-log requires a file path").to_string(),
-                );
-            }
-            "--version" | "-V" => {
-                println!("wzp-relay {}", env!("WZP_BUILD_HASH"));
-                std::process::exit(0);
-            }
             "--mesh-status" => {
                 // Print mesh table from a fresh registry and exit.
                 // In practice this is useful after the relay has been running;
@@ -154,11 +90,9 @@ fn parse_args() -> CliResult {
                 std::process::exit(0);
             }
             "--help" | "-h" => {
-                eprintln!("Usage: wzp-relay [--config <path>] [--listen <addr>] [--remote <addr>] [--auth-url <url>] [--metrics-port <port>] [--probe <addr>]... [--probe-mesh] [--mesh-status]");
+                eprintln!("Usage: wzp-relay [--listen <addr>] [--remote <addr>] [--auth-url <url>] [--metrics-port <port>] [--probe <addr>]... [--probe-mesh] [--mesh-status]");
                 eprintln!();
                 eprintln!("Options:");
-                eprintln!("  -c, --config <path>    Load config from TOML file (creates example if missing)");
-                eprintln!("  -i, --identity <path>  Identity file path (creates if missing, uses OsRng)");
                 eprintln!("  --listen <addr>        Listen address (default: 0.0.0.0:4433)");
                 eprintln!("  --remote <addr>        Remote relay for forwarding (disables room mode)");
                 eprintln!("  --auth-url <url>       featherChat auth endpoint (e.g., https://chat.example.com/v1/auth/validate)");
@@ -168,8 +102,6 @@ fn parse_args() -> CliResult {
                 eprintln!("  --probe-mesh           Enable mesh mode (mark config flag, probes all --probe targets).");
                 eprintln!("  --mesh-status          Print mesh health table and exit (diagnostic).");
                 eprintln!("  --trunking             Enable trunk batching for outgoing media in room mode.");
-                eprintln!("  --global-room <name>   Declare a room as global (bridged across federation). Repeatable.");
-                eprintln!("  --debug-tap <room>     Log packet headers for a room ('*' for all rooms).");
                 eprintln!("  --ws-port <port>       WebSocket listener port for browser clients (e.g., 8080).");
                 eprintln!("  --static-dir <dir>     Directory to serve static files from (HTML/JS/WASM).");
                 eprintln!();
@@ -184,7 +116,7 @@ fn parse_args() -> CliResult {
         }
         i += 1;
     }
-    CliResult { config, identity_path, config_file, config_needs_create }
+    config
 }
 
 struct RelayStats {
@@ -252,29 +184,10 @@ async fn run_downstream(
     }
 }
 
-/// Detect a non-loopback IP address from local interfaces.
-/// Prefers public IPs over private (10.x, 172.16-31.x, 192.168.x).
-fn detect_public_ip() -> Option<String> {
-    use std::net::UdpSocket;
-    // Connect to a public address to find our outbound IP (doesn't actually send anything)
-    if let Ok(socket) = UdpSocket::bind("0.0.0.0:0") {
-        if socket.connect("8.8.8.8:80").is_ok() {
-            if let Ok(addr) = socket.local_addr() {
-                return Some(addr.ip().to_string());
-            }
-        }
-    }
-    None
-}
-
-/// Build-time git hash, set by build.rs or env.
-const BUILD_GIT_HASH: &str = env!("WZP_BUILD_HASH");
-
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
-    let CliResult { config, identity_path, config_file, config_needs_create } = parse_args();
+    let config = parse_args();
     tracing_subscriber::fmt().init();
-    info!(version = BUILD_GIT_HASH, "wzp-relay build");
     rustls::crypto::ring::default_provider()
         .install_default()
         .expect("failed to install rustls crypto provider");
@@ -294,115 +207,14 @@ async fn main() -> anyhow::Result<()> {
         tokio::spawn(wzp_relay::metrics::serve_metrics(port, m, p, rr));
     }
 
-    // Load or generate relay identity
+    // Generate ephemeral relay identity for crypto handshake
-    let relay_seed = {
+    let relay_seed = wzp_crypto::Seed::generate();
-        let id_path = match identity_path {
-            Some(ref p) => std::path::PathBuf::from(p),
-            None => dirs::home_dir()
-                .unwrap_or_else(|| std::path::PathBuf::from("."))
-                .join(".wzp")
-                .join("relay-identity"),
-        };
-        if id_path.exists() {
-            if let Ok(hex) = std::fs::read_to_string(&id_path) {
-                if let Ok(s) = wzp_crypto::Seed::from_hex(hex.trim()) {
-                    info!("loaded relay identity from {}", id_path.display());
-                    s
-                } else {
-                    warn!("corrupt identity file {}, generating new", id_path.display());
-                    let s = wzp_crypto::Seed::generate();
-                    let hex: String = s.0.iter().map(|b| format!("{b:02x}")).collect();
-                    let _ = std::fs::write(&id_path, &hex);
-                    s
-                }
-            } else {
-                let s = wzp_crypto::Seed::generate();
-                let hex: String = s.0.iter().map(|b| format!("{b:02x}")).collect();
-                let _ = std::fs::write(&id_path, &hex);
-                s
-            }
-        } else {
-            let s = wzp_crypto::Seed::generate();
-            if let Some(parent) = id_path.parent() {
-                let _ = std::fs::create_dir_all(parent);
-            }
-            let hex: String = s.0.iter().map(|b| format!("{b:02x}")).collect();
-            let _ = std::fs::write(&id_path, &hex);
-            info!("generated relay identity at {}", id_path.display());
-            s
-        }
-    };
     let relay_fp = relay_seed.derive_identity().public_identity().fingerprint;
     info!(addr = %config.listen_addr, fingerprint = %relay_fp, "WarzonePhone relay starting");
 
-    let (server_config, cert_der) = wzp_transport::server_config_from_seed(&relay_seed.0);
+    let (server_config, _cert) = wzp_transport::server_config();
-    let tls_fp = wzp_transport::tls_fingerprint(&cert_der);
-    info!(tls_fingerprint = %tls_fp, "TLS certificate (deterministic from relay identity)");
-
-    // Create personalized config file if it was missing
-    let public_ip = detect_public_ip();
-    if config_needs_create {
-        if let Some(ref path) = config_file {
-            let info = wzp_relay::config::RelayInfo {
-                listen_addr: config.listen_addr.to_string(),
-                tls_fingerprint: tls_fp.clone(),
-                public_ip: public_ip.clone(),
-            };
-            if let Err(e) = wzp_relay::config::load_or_create_config(path, Some(&info)) {
-                warn!("failed to create config: {e}");
-            }
-        }
-    }
-
-    // Print federation hint with our public IP + listen port + TLS fingerprint
-    let listen_port = config.listen_addr.port();
-    if let Some(ip) = &public_ip {
-        info!("federation: to peer with this relay, add to relay.toml:");
-        info!("  [[peers]]");
-        info!("  url = \"{ip}:{listen_port}\"");
-        info!("  fingerprint = \"{tls_fp}\"");
-    }
-
-    // Log configured peers and trusted relays
-    if !config.peers.is_empty() {
-        info!(count = config.peers.len(), "federation peers configured");
-        for p in &config.peers {
-            info!(url = %p.url, label = ?p.label, "  peer");
-        }
-    }
-    if !config.trusted.is_empty() {
-        info!(count = config.trusted.len(), "trusted relays configured");
-        for t in &config.trusted {
-            info!(fingerprint = %t.fingerprint, label = ?t.label, "  trusted");
-        }
-    }
     let endpoint = wzp_transport::create_endpoint(config.listen_addr, Some(server_config))?;
 
-    // Compute the IP address we should advertise in CallSetup for direct
-    // calls. If the relay is bound to a specific IP, use it as-is; if bound
-    // to 0.0.0.0, use the trick of "connect" a UDP socket to an arbitrary
-    // external address and read its local_addr — the OS binds to whichever
-    // local interface IP would route packets to that destination, which is
-    // the primary outbound interface. This is the same IP clients on the
-    // LAN use to reach us.
-    let advertised_ip: std::net::IpAddr = {
-        let listen_ip = config.listen_addr.ip();
-        if !listen_ip.is_unspecified() {
-            listen_ip
-        } else {
-            // Probe via a dummy "connected" UDP socket. Never actually sends.
-            match std::net::UdpSocket::bind("0.0.0.0:0")
-                .and_then(|s| { s.connect("8.8.8.8:80").map(|_| s) })
-                .and_then(|s| s.local_addr())
-            {
-                Ok(a) if !a.ip().is_loopback() => a.ip(),
-                _ => std::net::IpAddr::from([127u8, 0, 0, 1]),
-            }
-        }
-    };
-    let advertised_addr_str = format!("{}:{}", advertised_ip, config.listen_addr.port());
-    info!(%advertised_addr_str, "relay advertised address for CallSetup");
-
     // Forward mode
     let remote_transport: Option<Arc<wzp_transport::QuinnTransport>> =
         if let Some(remote_addr) = config.remote_relay {
@@ -418,41 +230,9 @@ async fn main() -> anyhow::Result<()> {
     // Room manager (room mode only)
     let room_mgr = Arc::new(Mutex::new(RoomManager::new()));
 
-    // Event log for protocol analysis
-    let event_log = wzp_relay::event_log::start_event_log(
-        config.event_log.as_ref().map(std::path::PathBuf::from)
-    );
-
-    // Federation manager
-    let global_room_set: std::collections::HashSet<String> = config.global_rooms.iter()
-        .map(|g| g.name.clone())
-        .collect();
-
-    let federation_mgr = if !config.peers.is_empty() || !config.trusted.is_empty() || !global_room_set.is_empty() {
-        let fm = Arc::new(wzp_relay::federation::FederationManager::new(
-            config.peers.clone(),
-            config.trusted.clone(),
-            global_room_set.clone(),
-            room_mgr.clone(),
-            endpoint.clone(),
-            tls_fp.clone(),
-            metrics.clone(),
-            event_log.clone(),
-        ));
-        let fm_run = fm.clone();
-        tokio::spawn(async move { fm_run.run().await });
-        Some(fm)
-    } else {
-        None
-    };
-
     // Session manager — enforces max concurrent sessions
     let session_mgr = Arc::new(Mutex::new(SessionManager::new(config.max_sessions)));
 
-    // Signal hub + call registry for direct 1:1 calls
-    let signal_hub = Arc::new(Mutex::new(wzp_relay::signal_hub::SignalHub::new()));
-    let call_registry = Arc::new(Mutex::new(wzp_relay::call_registry::CallRegistry::new()));
-
     // Spawn inter-relay health probes via ProbeMesh coordinator
     if !config.probe_targets.is_empty() {
         let mesh = wzp_relay::probe::ProbeMesh::new(
@@ -487,32 +267,13 @@ async fn main() -> anyhow::Result<()> {
     } else {
         info!("auth disabled — any client can connect (use --auth-url to enable)");
     }
-    if !config.global_rooms.is_empty() {
-        info!(count = config.global_rooms.len(), "global rooms configured");
-        for g in &config.global_rooms {
-            info!(name = %g.name, "  global room");
-        }
-    }
-    if let Some(ref tap) = config.debug_tap {
-        info!(filter = %tap, "debug tap enabled — logging packet headers");
-    }
 
     info!("Listening for connections...");
 
     loop {
-        // Pull the next Incoming off the queue. Deliberately do NOT await
+        let connection = match wzp_transport::accept(&endpoint).await {
-        // the QUIC handshake here — move that into the per-connection
+            Ok(conn) => conn,
-        // spawned task below. Previously we used wzp_transport::accept
+            Err(e) => { error!("accept: {e}"); continue; }
-        // which did both, which meant a single slow handshake would block
-        // the entire accept loop and prevent ALL subsequent connections
-        // from being processed. Surfaced as direct-call hangs where the
-        // callee's call-* connection never completes its QUIC handshake.
-        let incoming = match endpoint.accept().await {
-            Some(inc) => inc,
-            None => {
-                error!("endpoint.accept() returned None — endpoint closed");
-                break;
-            }
         };
 
         let remote_transport = remote_transport.clone();
@@ -522,28 +283,10 @@ async fn main() -> anyhow::Result<()> {
         let relay_seed_bytes = relay_seed.0;
         let metrics = metrics.clone();
         let trunking_enabled = config.trunking_enabled;
-        let debug_tap = config.debug_tap.as_ref().map(|filter| room::DebugTap { room_filter: filter.clone() });
         let presence = presence.clone();
         let route_resolver = route_resolver.clone();
-        let federation_mgr = federation_mgr.clone();
-        let signal_hub = signal_hub.clone();
-        let call_registry = call_registry.clone();
-        let advertised_addr_str = advertised_addr_str.clone();
-
-        let incoming_addr = incoming.remote_address();
-        info!(%incoming_addr, "accept queue: new Incoming, spawning handshake task");
 
         tokio::spawn(async move {
-            // Drive the QUIC handshake inside the spawned task so that
-            // slow or hung handshakes never block the outer accept loop.
-            let connection = match incoming.await {
-                Ok(c) => c,
-                Err(e) => {
-                    error!(%incoming_addr, "QUIC handshake failed: {e}");
-                    return;
-                }
-            };
-            info!(%incoming_addr, "QUIC handshake complete");
             let addr = connection.remote_address();
 
             let room_name = connection
@@ -556,23 +299,6 @@ async fn main() -> anyhow::Result<()> {
 
             let transport = Arc::new(wzp_transport::QuinnTransport::new(connection));
 
-            // Ping connections: client just measures QUIC connect RTT.
-            if room_name == "ping" {
-                info!(%addr, "ping connection (RTT probe)");
-                return;
-            }
-
-            // Version query: respond with build hash over a uni stream.
-            if room_name == "version" {
-                if let Ok(mut send) = transport.connection().open_uni().await {
-                    let _ = send.write_all(BUILD_GIT_HASH.as_bytes()).await;
-                    let _ = send.finish();
-                    // Wait for client to read before closing
-                    tokio::time::sleep(std::time::Duration::from_millis(100)).await;
-                }
-                return;
-            }
-
             // Probe connections use SNI "_probe" to identify themselves.
             // They skip auth + handshake and just do Ping->Pong + presence gossip.
             if room_name == "_probe" {
@@ -659,290 +385,6 @@ async fn main() -> anyhow::Result<()> {
                 return;
             }
 
-            // Federation connections use SNI "_federation"
-            if room_name == "_federation" {
-                if let Some(ref fm) = federation_mgr {
-                    // Wait for FederationHello to identify the connecting relay
-                    let hello_fp = match tokio::time::timeout(
-                        std::time::Duration::from_secs(5),
-                        transport.recv_signal(),
-                    ).await {
-                        Ok(Ok(Some(wzp_proto::SignalMessage::FederationHello { tls_fingerprint }))) => tls_fingerprint,
-                        _ => {
-                            warn!(%addr, "federation: no hello received, closing");
-                            return;
-                        }
-                    };
-
-                    if let Some(label) = fm.check_inbound_trust(addr, &hello_fp) {
-                        let peer_config = wzp_relay::config::PeerConfig {
-                            url: addr.to_string(),
-                            fingerprint: hello_fp,
-                            label: Some(label.clone()),
-                        };
-                        let fm = fm.clone();
-                        info!(%addr, label = %label, "inbound federation accepted (trusted)");
-                        fm.handle_inbound(transport, peer_config).await;
-                    } else {
-                        warn!(%addr, fp = %hello_fp, "unknown relay wants to federate");
-                        info!("  to accept, add to relay.toml:");
-                        info!("  [[trusted]]");
-                        info!("  fingerprint = \"{hello_fp}\"");
-                        info!("  label = \"Relay at {addr}\"");
-                    }
-                } else {
-                    info!(%addr, "federation connection rejected (no federation configured)");
-                }
-                return;
-            }
-
-            // Direct calling: persistent signaling connection
-            if room_name == "_signal" {
-                info!(%addr, "signal connection");
-
-                // Optional auth
-                let auth_fp: Option<String> = if let Some(ref url) = auth_url {
-                    match transport.recv_signal().await {
-                        Ok(Some(SignalMessage::AuthToken { token })) => {
-                            match wzp_relay::auth::validate_token(url, &token).await {
-                                Ok(client) => Some(client.fingerprint),
-                                Err(e) => {
-                                    error!(%addr, "signal auth failed: {e}");
-                                    return;
-                                }
-                            }
-                        }
-                        _ => { warn!(%addr, "signal: expected AuthToken"); return; }
-                    }
-                } else {
-                    None
-                };
-
-                // Wait for RegisterPresence
-                let (client_fp, client_alias) = match tokio::time::timeout(
-                    std::time::Duration::from_secs(10),
-                    transport.recv_signal(),
-                ).await {
-                    Ok(Ok(Some(SignalMessage::RegisterPresence { identity_pub, signature: _, alias }))) => {
-                        // Compute fingerprint: SHA-256(Ed25519 pub key)[:16], same as Fingerprint type
-                        let fp = {
-                            use sha2::{Sha256, Digest};
-                            let hash = Sha256::digest(&identity_pub);
-                            let fingerprint = wzp_crypto::Fingerprint([
-                                hash[0], hash[1], hash[2], hash[3], hash[4], hash[5], hash[6], hash[7],
-                                hash[8], hash[9], hash[10], hash[11], hash[12], hash[13], hash[14], hash[15],
-                            ]);
-                            fingerprint.to_string()
-                        };
-                        let fp = auth_fp.unwrap_or(fp);
-                        (fp, alias)
-                    }
-                    _ => {
-                        warn!(%addr, "signal: no RegisterPresence received");
-                        return;
-                    }
-                };
-
-                // Register in signal hub + presence
-                {
-                    let mut hub = signal_hub.lock().await;
-                    hub.register(client_fp.clone(), transport.clone(), client_alias.clone());
-                }
-                {
-                    let mut reg = presence.lock().await;
-                    reg.register_local(&client_fp, client_alias.clone(), None);
-                }
-
-                // Send ack
-                let _ = transport.send_signal(&SignalMessage::RegisterPresenceAck {
-                    success: true,
-                    error: None,
-                }).await;
-
-                info!(%addr, fingerprint = %client_fp, alias = ?client_alias, "signal client registered");
-
-                // Signal recv loop
-                loop {
-                    match transport.recv_signal().await {
-                        Ok(Some(msg)) => {
-                            match msg {
-                                SignalMessage::DirectCallOffer { ref target_fingerprint, ref call_id, .. } => {
-                                    let target_fp = target_fingerprint.clone();
-                                    let call_id = call_id.clone();
-
-                                    // Check if target is online
-                                    let online = {
-                                        let hub = signal_hub.lock().await;
-                                        hub.is_online(&target_fp)
-                                    };
-                                    if !online {
-                                        info!(%addr, target = %target_fp, "call target not online");
-                                        let _ = transport.send_signal(&SignalMessage::Hangup {
-                                            reason: wzp_proto::HangupReason::Normal,
-                                        }).await;
-                                        continue;
-                                    }
-
-                                    // Create call in registry
-                                    {
-                                        let mut reg = call_registry.lock().await;
-                                        reg.create_call(call_id.clone(), client_fp.clone(), target_fp.clone());
-                                    }
-
-                                    // Forward offer to callee
-                                    info!(caller = %client_fp, callee = %target_fp, call_id = %call_id, "routing direct call offer");
-                                    let hub = signal_hub.lock().await;
-                                    if let Err(e) = hub.send_to(&target_fp, &msg).await {
-                                        warn!("failed to forward call offer: {e}");
-                                    }
-
-                                    // Send ringing to caller
-                                    drop(hub);
-                                    let _ = transport.send_signal(&SignalMessage::CallRinging {
-                                        call_id: call_id.clone(),
-                                    }).await;
-                                }
-
-                                SignalMessage::DirectCallAnswer { ref call_id, ref accept_mode, .. } => {
-                                    let call_id = call_id.clone();
-                                    let mode = *accept_mode;
-
-                                    let peer_fp = {
-                                        let reg = call_registry.lock().await;
-                                        reg.peer_fingerprint(&call_id, &client_fp).map(|s| s.to_string())
-                                    };
-
-                                    let Some(peer_fp) = peer_fp else {
-                                        warn!(call_id = %call_id, "answer for unknown call");
-                                        continue;
-                                    };
-
-                                    if mode == wzp_proto::CallAcceptMode::Reject {
-                                        info!(call_id = %call_id, "call rejected");
-                                        let mut reg = call_registry.lock().await;
-                                        reg.end_call(&call_id);
-                                        drop(reg);
-                                        let hub = signal_hub.lock().await;
-                                        let _ = hub.send_to(&peer_fp, &SignalMessage::Hangup {
-                                            reason: wzp_proto::HangupReason::Normal,
-                                        }).await;
-                                    } else {
-                                        // Accept — create private room
-                                        let room = format!("call-{call_id}");
-                                        {
-                                            let mut reg = call_registry.lock().await;
-                                            reg.set_active(&call_id, mode, room.clone());
-                                        }
-                                        info!(call_id = %call_id, room = %room, mode = ?mode, "call accepted, creating room");
-
-                                        // Forward answer to caller
-                                        {
-                                            let hub = signal_hub.lock().await;
-                                            let _ = hub.send_to(&peer_fp, &msg).await;
-                                        }
-
-                                        // Send CallSetup to both parties.
-                                        //
-                                        // BUG FIX: the previous version of this used `addr.ip()`
-                                        // which is `connection.remote_address()` — the CLIENT'S
-                                        // IP, not the relay's. So CallSetup told both parties to
-                                        // dial the answerer's own IP, which meant the caller was
-                                        // sending QUIC Initials into the callee's client (no
-                                        // server listening there) and the callee was sending to
-                                        // itself. In both cases endpoint.connect() hung forever.
-                                        //
-                                        // Use the relay's precomputed advertised address instead.
-                                        let relay_addr_for_setup = advertised_addr_str.clone();
-                                        let setup = SignalMessage::CallSetup {
-                                            call_id: call_id.clone(),
-                                            room: room.clone(),
-                                            relay_addr: relay_addr_for_setup,
-                                        };
-                                        {
-                                            let hub = signal_hub.lock().await;
-                                            let _ = hub.send_to(&peer_fp, &setup).await;
-                                            let _ = hub.send_to(&client_fp, &setup).await;
-                                        }
-                                    }
-                                }
-
-                                SignalMessage::Hangup { .. } => {
-                                    // Forward hangup to all active calls for this user
-                                    let calls = {
-                                        let reg = call_registry.lock().await;
-                                        reg.calls_for_fingerprint(&client_fp)
-                                            .iter()
-                                            .map(|c| (c.call_id.clone(), if c.caller_fingerprint == client_fp {
-                                                c.callee_fingerprint.clone()
-                                            } else {
-                                                c.caller_fingerprint.clone()
-                                            }))
-                                            .collect::<Vec<_>>()
-                                    };
-                                    for (call_id, peer_fp) in &calls {
-                                        let hub = signal_hub.lock().await;
-                                        let _ = hub.send_to(peer_fp, &msg).await;
-                                        drop(hub);
-                                        let mut reg = call_registry.lock().await;
-                                        reg.end_call(call_id);
-                                    }
-                                }
-
-                                SignalMessage::Ping { timestamp_ms } => {
-                                    let _ = transport.send_signal(&SignalMessage::Pong { timestamp_ms }).await;
-                                }
-
-                                other => {
-                                    warn!(%addr, "signal: unexpected message: {:?}", std::mem::discriminant(&other));
-                                }
-                            }
-                        }
-                        Ok(None) => {
-                            info!(%addr, "signal connection closed");
-                            break;
-                        }
-                        Err(e) => {
-                            warn!(%addr, "signal recv error: {e}");
-                            break;
-                        }
-                    }
-                }
-
-                // Cleanup: unregister + end active calls
-                let active_calls = {
-                    let reg = call_registry.lock().await;
-                    reg.calls_for_fingerprint(&client_fp)
-                        .iter()
-                        .map(|c| (c.call_id.clone(), if c.caller_fingerprint == client_fp {
-                            c.callee_fingerprint.clone()
-                        } else {
-                            c.caller_fingerprint.clone()
-                        }))
-                        .collect::<Vec<_>>()
-                };
-                for (call_id, peer_fp) in &active_calls {
-                    let hub = signal_hub.lock().await;
-                    let _ = hub.send_to(peer_fp, &SignalMessage::Hangup {
-                        reason: wzp_proto::HangupReason::Normal,
-                    }).await;
-                    drop(hub);
-                    let mut reg = call_registry.lock().await;
-                    reg.end_call(call_id);
-                }
-
-                {
-                    let mut hub = signal_hub.lock().await;
-                    hub.unregister(&client_fp);
-                }
-                {
-                    let mut reg = presence.lock().await;
-                    reg.unregister_local(&client_fp);
-                }
-
-                transport.close().await.ok();
-                return;
-            }
-
             // Auth check: if --auth-url is set, expect first signal message to be a token
             // Auth: if --auth-url is set, expect AuthToken as first signal
             let authenticated_fp: Option<String> = if let Some(ref url) = auth_url {
@@ -1009,28 +451,6 @@ async fn main() -> anyhow::Result<()> {
             // Use the caller's identity fingerprint from the handshake
             let participant_fp = authenticated_fp.clone().unwrap_or(caller_fp);
 
-            // ACL: call rooms (call-*) are restricted to the two authorized participants.
-            // Only the relay's call orchestrator creates these rooms — random clients can't join.
-            if room_name.starts_with("call-") {
-                let call_id = &room_name[5..]; // strip "call-" prefix
-                let authorized = {
-                    let reg = call_registry.lock().await;
-                    match reg.get(call_id) {
-                        Some(call) => {
-                            call.caller_fingerprint == participant_fp
-                                || call.callee_fingerprint == participant_fp
-                        }
-                        None => false, // unknown call — reject
-                    }
-                };
-                if !authorized {
-                    warn!(%addr, room = %room_name, fp = %participant_fp, "rejected: not authorized for this call room");
-                    transport.close().await.ok();
-                    return;
-                }
-                info!(%addr, room = %room_name, fp = %participant_fp, "authorized for call room");
-            }
-
             // Register in presence registry
             {
                 let mut reg = presence.lock().await;
@@ -1083,20 +503,6 @@ async fn main() -> anyhow::Result<()> {
 
                 metrics.active_sessions.inc();
 
-                // Call rooms: enforce 2-participant limit
-                if room_name.starts_with("call-") {
-                    let mgr = room_mgr.lock().await;
-                    if mgr.room_size(&room_name) >= 2 {
-                        drop(mgr);
-                        warn!(%addr, room = %room_name, "call room full (max 2 participants)");
-                        metrics.active_sessions.dec();
-                        let mut smgr = session_mgr.lock().await;
-                        smgr.remove_session(session_id);
-                        transport.close().await.ok();
-                        return;
-                    }
-                }
-
                 let participant_id = {
                     let mut mgr = room_mgr.lock().await;
                     match mgr.join(
@@ -1109,25 +515,7 @@ async fn main() -> anyhow::Result<()> {
                         Ok((id, update, senders)) => {
                             metrics.active_rooms.set(mgr.list().len() as i64);
                             drop(mgr); // release lock before async broadcast
-
+                            room::broadcast_signal(&senders, &update).await;
-                            // Merge federated participants into RoomUpdate if this is a global room
-                            let merged_update = if let Some(ref fm) = federation_mgr {
-                                if fm.is_global_room(&room_name) {
-                                    if let SignalMessage::RoomUpdate { count: _, participants: mut local_parts } = update {
-                                        let remote = fm.get_remote_participants(&room_name).await;
-                                        local_parts.extend(remote);
-                                        // Deduplicate by fingerprint
-                                        let mut seen = std::collections::HashSet::new();
-                                        local_parts.retain(|p| seen.insert(p.fingerprint.clone()));
-                                        SignalMessage::RoomUpdate {
-                                            count: local_parts.len() as u32,
-                                            participants: local_parts,
-                                        }
-                                    } else { update }
-                                } else { update }
-                            } else { update };
-
-                            room::broadcast_signal(&senders, &merged_update).await;
                             id
                         }
                         Err(e) => {
@@ -1145,25 +533,6 @@ async fn main() -> anyhow::Result<()> {
                     .iter()
                     .map(|b| format!("{b:02x}"))
                     .collect();
-                // Set up federation media channel if this is a global room
-                let (federation_tx, federation_room_hash) = if let Some(ref fm) = federation_mgr {
-                    let is_global = fm.is_global_room(&room_name);
-                    if is_global {
-                        let canonical_hash = fm.global_room_hash(&room_name);
-                        let (tx, rx) = tokio::sync::mpsc::channel(256);
-                        let fm_clone = fm.clone();
-                        tokio::spawn(async move {
-                            wzp_relay::federation::run_federation_media_egress(fm_clone, rx).await;
-                        });
-                        info!(room = %room_name, canonical = ?fm.resolve_global_room(&room_name), "federation egress created (global room)");
-                        (Some(tx), Some(canonical_hash))
-                    } else {
-                        (None, None)
-                    }
-                } else {
-                    (None, None)
-                };
-
                 room::run_participant(
                     room_mgr.clone(),
                     room_name,
@@ -1172,9 +541,6 @@ async fn main() -> anyhow::Result<()> {
                     metrics.clone(),
                     &session_id_str,
                     trunking_enabled,
-                    debug_tap,
-                    federation_tx,
-                    federation_room_hash,
                 ).await;
 
                 // Participant disconnected — clean up presence + per-session metrics
@@ -1197,5 +563,4 @@ async fn main() -> anyhow::Result<()> {
             }
         });
     }
-    Ok(())
 }

crates/wzp-relay/src/metrics.rs

@@ -16,22 +16,12 @@ pub struct RelayMetrics {
     pub bytes_forwarded: IntCounter,
     pub auth_attempts: IntCounterVec,
     pub handshake_duration: Histogram,
-    // Federation metrics
-    pub federation_peer_status: IntGaugeVec,
-    pub federation_peer_rtt_ms: GaugeVec,
-    pub federation_packets_forwarded: IntCounterVec,
-    pub federation_packets_deduped: IntCounter,
-    pub federation_packets_rate_limited: IntCounter,
-    pub federation_active_rooms: IntGauge,
     // Per-session metrics
     pub session_buffer_depth: IntGaugeVec,
     pub session_loss_pct: GaugeVec,
     pub session_rtt_ms: GaugeVec,
     pub session_underruns: IntCounterVec,
     pub session_overruns: IntCounterVec,
-    // Phase 4: loss-recovery breakdown per session.
-    pub session_dred_reconstructions: IntCounterVec,
-    pub session_classical_plc: IntCounterVec,
     registry: Registry,
 }
 
@@ -70,28 +60,6 @@ impl RelayMetrics {
         )
         .expect("metric");
 
-        let federation_peer_status = IntGaugeVec::new(
-            Opts::new("wzp_federation_peer_status", "Peer connection status (0=disconnected, 1=connected)"),
-            &["peer"],
-        ).expect("metric");
-        let federation_peer_rtt_ms = GaugeVec::new(
-            Opts::new("wzp_federation_peer_rtt_ms", "QUIC RTT to federated peer in milliseconds"),
-            &["peer"],
-        ).expect("metric");
-        let federation_packets_forwarded = IntCounterVec::new(
-            Opts::new("wzp_federation_packets_forwarded_total", "Packets forwarded to/from federated peers"),
-            &["peer", "direction"],
-        ).expect("metric");
-        let federation_packets_deduped = IntCounter::with_opts(
-            Opts::new("wzp_federation_packets_deduped_total", "Duplicate federation packets dropped"),
-        ).expect("metric");
-        let federation_packets_rate_limited = IntCounter::with_opts(
-            Opts::new("wzp_federation_packets_rate_limited_total", "Federation packets dropped by rate limiter"),
-        ).expect("metric");
-        let federation_active_rooms = IntGauge::with_opts(
-            Opts::new("wzp_federation_active_rooms", "Number of federated rooms currently active"),
-        ).expect("metric");
-
         let session_buffer_depth = IntGaugeVec::new(
             Opts::new(
                 "wzp_relay_session_jitter_buffer_depth",
@@ -133,42 +101,17 @@ impl RelayMetrics {
         )
         .expect("metric");
 
-        let session_dred_reconstructions = IntCounterVec::new(
-            Opts::new(
-                "wzp_relay_session_dred_reconstructions_total",
-                "Frames reconstructed via DRED (Deep REDundancy) per session",
-            ),
-            &["session_id"],
-        )
-        .expect("metric");
-        let session_classical_plc = IntCounterVec::new(
-            Opts::new(
-                "wzp_relay_session_classical_plc_total",
-                "Frames filled via classical Opus/Codec2 PLC per session",
-            ),
-            &["session_id"],
-        )
-        .expect("metric");
-
         registry.register(Box::new(active_sessions.clone())).expect("register");
         registry.register(Box::new(active_rooms.clone())).expect("register");
         registry.register(Box::new(packets_forwarded.clone())).expect("register");
         registry.register(Box::new(bytes_forwarded.clone())).expect("register");
         registry.register(Box::new(auth_attempts.clone())).expect("register");
         registry.register(Box::new(handshake_duration.clone())).expect("register");
-        registry.register(Box::new(federation_peer_status.clone())).expect("register");
-        registry.register(Box::new(federation_peer_rtt_ms.clone())).expect("register");
-        registry.register(Box::new(federation_packets_forwarded.clone())).expect("register");
-        registry.register(Box::new(federation_packets_deduped.clone())).expect("register");
-        registry.register(Box::new(federation_packets_rate_limited.clone())).expect("register");
-        registry.register(Box::new(federation_active_rooms.clone())).expect("register");
         registry.register(Box::new(session_buffer_depth.clone())).expect("register");
         registry.register(Box::new(session_loss_pct.clone())).expect("register");
         registry.register(Box::new(session_rtt_ms.clone())).expect("register");
         registry.register(Box::new(session_underruns.clone())).expect("register");
         registry.register(Box::new(session_overruns.clone())).expect("register");
-        registry.register(Box::new(session_dred_reconstructions.clone())).expect("register");
-        registry.register(Box::new(session_classical_plc.clone())).expect("register");
 
         Self {
             active_sessions,
@@ -177,19 +120,11 @@ impl RelayMetrics {
             bytes_forwarded,
             auth_attempts,
             handshake_duration,
-            federation_peer_status,
-            federation_peer_rtt_ms,
-            federation_packets_forwarded,
-            federation_packets_deduped,
-            federation_packets_rate_limited,
-            federation_active_rooms,
             session_buffer_depth,
             session_loss_pct,
             session_rtt_ms,
             session_underruns,
             session_overruns,
-            session_dred_reconstructions,
-            session_classical_plc,
             registry,
         }
     }
@@ -241,39 +176,6 @@ impl RelayMetrics {
         }
     }
 
-    /// Phase 4: update per-session loss-recovery counters from a client's
-    /// `LossRecoveryUpdate` signal message. The client sends monotonic
-    /// totals (frames reconstructed since call start); we compute the
-    /// delta against the current Prometheus counter and increment by it.
-    /// IntCounterVec only increases, so a client restart that resets the
-    /// counter to 0 simply produces no delta until the new totals exceed
-    /// the Prometheus state.
-    pub fn update_session_loss_recovery(
-        &self,
-        session_id: &str,
-        dred_reconstructions: u64,
-        classical_plc: u64,
-    ) {
-        let cur_dred = self
-            .session_dred_reconstructions
-            .with_label_values(&[session_id])
-            .get();
-        if dred_reconstructions > cur_dred {
-            self.session_dred_reconstructions
-                .with_label_values(&[session_id])
-                .inc_by(dred_reconstructions - cur_dred);
-        }
-        let cur_plc = self
-            .session_classical_plc
-            .with_label_values(&[session_id])
-            .get();
-        if classical_plc > cur_plc {
-            self.session_classical_plc
-                .with_label_values(&[session_id])
-                .inc_by(classical_plc - cur_plc);
-        }
-    }
-
     /// Remove all per-session label values for a disconnected session.
     pub fn remove_session_metrics(&self, session_id: &str) {
         let _ = self.session_buffer_depth.remove_label_values(&[session_id]);
@@ -281,10 +183,6 @@ impl RelayMetrics {
         let _ = self.session_rtt_ms.remove_label_values(&[session_id]);
         let _ = self.session_underruns.remove_label_values(&[session_id]);
         let _ = self.session_overruns.remove_label_values(&[session_id]);
-        let _ = self
-            .session_dred_reconstructions
-            .remove_label_values(&[session_id]);
-        let _ = self.session_classical_plc.remove_label_values(&[session_id]);
     }
 
     /// Get a reference to the underlying Prometheus registry.
@@ -479,13 +377,10 @@ mod tests {
         };
         m.update_session_quality("sess-cleanup", &report);
         m.update_session_buffer("sess-cleanup", 42, 3, 1);
-        m.update_session_loss_recovery("sess-cleanup", 17, 4);
 
         // Verify they appear
         let output = m.metrics_handler();
         assert!(output.contains("sess-cleanup"));
-        assert!(output.contains("wzp_relay_session_dred_reconstructions_total"));
-        assert!(output.contains("wzp_relay_session_classical_plc_total"));
 
         // Remove and verify they are gone
         m.remove_session_metrics("sess-cleanup");
@@ -493,55 +388,6 @@ mod tests {
         assert!(!output.contains("sess-cleanup"));
     }
 
-    /// Phase 4: LossRecoveryUpdate → per-session counters, monotonic delta
-    /// application.
-    #[test]
-    fn session_loss_recovery_monotonic_delta() {
-        let m = RelayMetrics::new();
-        let sess = "sess-dred";
-
-        // First update: 10 DRED, 2 PLC
-        m.update_session_loss_recovery(sess, 10, 2);
-        let dred1 = m
-            .session_dred_reconstructions
-            .with_label_values(&[sess])
-            .get();
-        let plc1 = m.session_classical_plc.with_label_values(&[sess]).get();
-        assert_eq!(dred1, 10);
-        assert_eq!(plc1, 2);
-
-        // Second update: 25 DRED, 5 PLC — counter advances by (15, 3)
-        m.update_session_loss_recovery(sess, 25, 5);
-        let dred2 = m
-            .session_dred_reconstructions
-            .with_label_values(&[sess])
-            .get();
-        let plc2 = m.session_classical_plc.with_label_values(&[sess]).get();
-        assert_eq!(dred2, 25);
-        assert_eq!(plc2, 5);
-
-        // Third update with LOWER values (e.g., client reset) — counters
-        // hold steady, no decrement.
-        m.update_session_loss_recovery(sess, 5, 1);
-        let dred3 = m
-            .session_dred_reconstructions
-            .with_label_values(&[sess])
-            .get();
-        let plc3 = m.session_classical_plc.with_label_values(&[sess]).get();
-        assert_eq!(dred3, 25, "counter must not decrease");
-        assert_eq!(plc3, 5, "counter must not decrease");
-
-        // Fourth update: client caught up and exceeded the old max.
-        m.update_session_loss_recovery(sess, 30, 8);
-        let dred4 = m
-            .session_dred_reconstructions
-            .with_label_values(&[sess])
-            .get();
-        let plc4 = m.session_classical_plc.with_label_values(&[sess]).get();
-        assert_eq!(dred4, 30);
-        assert_eq!(plc4, 8);
-    }
-
     #[test]
     fn metrics_increment() {
         let m = RelayMetrics::new();

crates/wzp-relay/src/room.rs

@@ -10,7 +10,7 @@ use std::time::Duration;
 
 use bytes::Bytes;
 use tokio::sync::Mutex;
-use tracing::{error, info, warn};
+use tracing::{debug, error, info, trace, warn};
 
 use wzp_proto::packet::TrunkFrame;
 use wzp_proto::MediaTransport;
@@ -18,38 +18,6 @@ use wzp_proto::MediaTransport;
 use crate::metrics::RelayMetrics;
 use crate::trunk::TrunkBatcher;
 
-/// Debug tap: logs packet metadata for matching rooms.
-#[derive(Clone)]
-pub struct DebugTap {
-    /// Room name filter ("*" = all rooms, or specific room name/hash).
-    pub room_filter: String,
-}
-
-impl DebugTap {
-    pub fn matches(&self, room_name: &str) -> bool {
-        self.room_filter == "*" || self.room_filter == room_name
-    }
-
-    pub fn log_packet(&self, room: &str, dir: &str, addr: &std::net::SocketAddr, pkt: &wzp_proto::MediaPacket, fan_out: usize) {
-        let h = &pkt.header;
-        info!(
-            target: "debug_tap",
-            room = %room,
-            dir = dir,
-            addr = %addr,
-            seq = h.seq,
-            codec = ?h.codec_id,
-            ts = h.timestamp,
-            fec_block = h.fec_block,
-            fec_sym = h.fec_symbol,
-            repair = h.is_repair,
-            len = pkt.payload.len(),
-            fan_out,
-            "TAP"
-        );
-    }
-}
-
 /// Unique participant ID within a room.
 pub type ParticipantId = u64;
 
@@ -59,22 +27,6 @@ fn next_id() -> ParticipantId {
     NEXT_PARTICIPANT_ID.fetch_add(1, Ordering::Relaxed)
 }
 
-/// Events emitted by RoomManager for federation to observe.
-#[derive(Clone, Debug)]
-pub enum RoomEvent {
-    /// First local participant joined this room.
-    LocalJoin { room: String },
-    /// Last local participant left this room.
-    LocalLeave { room: String },
-}
-
-/// Outbound federation media from a local participant.
-pub struct FederationMediaOut {
-    pub room_name: String,
-    pub room_hash: [u8; 8],
-    pub data: Bytes,
-}
-
 /// How to send data to a participant — either via QUIC transport or WebSocket channel.
 #[derive(Clone)]
 pub enum ParticipantSender {
@@ -180,7 +132,6 @@ impl Room {
             .map(|p| wzp_proto::packet::RoomParticipant {
                 fingerprint: p.fingerprint.clone().unwrap_or_default(),
                 alias: p.alias.clone(),
-                relay_label: None, // local participant
             })
             .collect()
     }
@@ -206,35 +157,24 @@ pub struct RoomManager {
     /// When `None`, rooms are open (no auth mode). When `Some`, only listed
     /// fingerprints can join the corresponding room.
     acl: Option<HashMap<String, HashSet<String>>>,
-    /// Channel for room lifecycle events (federation subscribes).
-    event_tx: tokio::sync::broadcast::Sender<RoomEvent>,
 }
 
 impl RoomManager {
     pub fn new() -> Self {
-        let (event_tx, _) = tokio::sync::broadcast::channel(64);
         Self {
             rooms: HashMap::new(),
             acl: None,
-            event_tx,
         }
     }
 
     /// Create a room manager with ACL enforcement enabled.
     pub fn with_acl() -> Self {
-        let (event_tx, _) = tokio::sync::broadcast::channel(64);
         Self {
             rooms: HashMap::new(),
             acl: Some(HashMap::new()),
-            event_tx,
         }
     }
 
-    /// Subscribe to room lifecycle events (for federation).
-    pub fn subscribe_events(&self) -> tokio::sync::broadcast::Receiver<RoomEvent> {
-        self.event_tx.subscribe()
-    }
-
     /// Grant a fingerprint access to a room.
     pub fn allow(&mut self, room_name: &str, fingerprint: &str) {
         if let Some(ref mut acl) = self.acl {
@@ -273,13 +213,8 @@ impl RoomManager {
             warn!(room = room_name, fingerprint = ?fingerprint, "unauthorized room join attempt");
             return Err("not authorized for this room".to_string());
         }
-        let was_empty = !self.rooms.contains_key(room_name)
-            || self.rooms.get(room_name).map_or(true, |r| r.is_empty());
         let room = self.rooms.entry(room_name.to_string()).or_insert_with(Room::new);
         let id = room.add(addr, sender, fingerprint.map(|s| s.to_string()), alias.map(|s| s.to_string()));
-        if was_empty {
-            let _ = self.event_tx.send(RoomEvent::LocalJoin { room: room_name.to_string() });
-        }
         let update = wzp_proto::SignalMessage::RoomUpdate {
             count: room.len() as u32,
             participants: room.participant_list(),
@@ -300,34 +235,12 @@ impl RoomManager {
         Ok(id)
     }
 
-    /// Get list of active room names.
-    pub fn active_rooms(&self) -> Vec<String> {
-        self.rooms.keys().cloned().collect()
-    }
-
-    /// Get participant list for a room (fingerprint + alias).
-    pub fn local_participant_list(&self, room_name: &str) -> Vec<wzp_proto::packet::RoomParticipant> {
-        self.rooms.get(room_name)
-            .map(|room| room.participant_list())
-            .unwrap_or_default()
-    }
-
-    /// Get all senders for participants in a room (for federation inbound media delivery).
-    pub fn local_senders(&self, room_name: &str) -> Vec<ParticipantSender> {
-        self.rooms.get(room_name)
-            .map(|room| room.participants.iter()
-                .map(|p| p.sender.clone())
-                .collect())
-            .unwrap_or_default()
-    }
-
     /// Leave a room. Returns (room_update_msg, remaining_senders) for broadcasting, or None if room is now empty.
     pub fn leave(&mut self, room_name: &str, participant_id: ParticipantId) -> Option<(wzp_proto::SignalMessage, Vec<ParticipantSender>)> {
         if let Some(room) = self.rooms.get_mut(room_name) {
             room.remove(participant_id);
             if room.is_empty() {
                 self.rooms.remove(room_name);
-                let _ = self.event_tx.send(RoomEvent::LocalLeave { room: room_name.to_string() });
                 info!(room = room_name, "room closed (empty)");
                 return None;
             }
@@ -437,9 +350,6 @@ pub async fn run_participant(
     metrics: Arc<RelayMetrics>,
     session_id: &str,
     trunking_enabled: bool,
-    debug_tap: Option<DebugTap>,
-    federation_tx: Option<tokio::sync::mpsc::Sender<FederationMediaOut>>,
-    federation_room_hash: Option<[u8; 8]>,
 ) {
     if trunking_enabled {
         run_participant_trunked(
@@ -448,7 +358,7 @@ pub async fn run_participant(
         .await;
     } else {
         run_participant_plain(
-            room_mgr, room_name, participant_id, transport, metrics, session_id, debug_tap, federation_tx, federation_room_hash,
+            room_mgr, room_name, participant_id, transport, metrics, session_id,
         )
         .await;
     }
@@ -462,9 +372,6 @@ async fn run_participant_plain(
     transport: Arc<wzp_transport::QuinnTransport>,
     metrics: Arc<RelayMetrics>,
     session_id: &str,
-    debug_tap: Option<DebugTap>,
-    federation_tx: Option<tokio::sync::mpsc::Sender<FederationMediaOut>>,
-    federation_room_hash: Option<[u8; 8]>,
 ) {
     let addr = transport.connection().remote_address();
     let mut packets_forwarded = 0u64;
@@ -483,6 +390,7 @@ async fn run_participant_plain(
     );
 
     loop {
+        let recv_start = std::time::Instant::now();
         let pkt = match transport.recv_media().await {
             Ok(Some(pkt)) => pkt,
             Ok(None) => {
@@ -537,13 +445,6 @@ async fn run_participant_plain(
             );
         }
 
-        // Debug tap: log packet metadata
-        if let Some(ref tap) = debug_tap {
-            if tap.matches(&room_name) {
-                tap.log_packet(&room_name, "in", &addr, &pkt, others.len());
-            }
-        }
-
         // Forward to all others
         let fwd_start = std::time::Instant::now();
         let pkt_bytes = pkt.payload.len() as u64;
@@ -568,17 +469,6 @@ async fn run_participant_plain(
                 }
             }
         }
-
-        // Federation: forward to active peer relays via channel
-        if let Some(ref fed_tx) = federation_tx {
-            let data = pkt.to_bytes();
-            let _ = fed_tx.try_send(FederationMediaOut {
-                room_name: room_name.clone(),
-                room_hash: federation_room_hash.unwrap_or_else(|| crate::federation::room_hash(&room_name)),
-                data,
-            });
-        }
-
         let fwd_ms = fwd_start.elapsed().as_millis() as u64;
         if fwd_ms > max_forward_ms {
             max_forward_ms = fwd_ms;
@@ -837,7 +727,7 @@ mod tests {
 
     #[test]
     fn room_join_leave() {
-        let mgr = RoomManager::new();
+        let mut mgr = RoomManager::new();
         assert_eq!(mgr.room_size("test"), 0);
         assert!(mgr.list().is_empty());
     }

crates/wzp-relay/src/signal_hub.rs

@@ -1,105 +0,0 @@
-//! Persistent signaling connection manager.
-//!
-//! Tracks clients connected via `_signal` SNI. Routes call signals
-//! (DirectCallOffer, DirectCallAnswer, Hangup) between registered users.
-
-use std::collections::HashMap;
-use std::sync::Arc;
-use std::time::Instant;
-
-use tracing::info;
-use wzp_proto::{MediaTransport, SignalMessage};
-use wzp_transport::QuinnTransport;
-
-/// A client connected via `_signal` for direct calling.
-pub struct SignalClient {
-    pub fingerprint: String,
-    pub alias: Option<String>,
-    pub transport: Arc<QuinnTransport>,
-    pub connected_at: Instant,
-}
-
-/// Manages persistent signaling connections.
-pub struct SignalHub {
-    clients: HashMap<String, SignalClient>,
-}
-
-impl SignalHub {
-    pub fn new() -> Self {
-        Self {
-            clients: HashMap::new(),
-        }
-    }
-
-    /// Register a new signaling client.
-    pub fn register(&mut self, fp: String, transport: Arc<QuinnTransport>, alias: Option<String>) {
-        info!(fingerprint = %fp, alias = ?alias, "signal client registered");
-        self.clients.insert(fp.clone(), SignalClient {
-            fingerprint: fp,
-            alias,
-            transport,
-            connected_at: Instant::now(),
-        });
-    }
-
-    /// Unregister a signaling client. Returns the client if found.
-    pub fn unregister(&mut self, fp: &str) -> Option<SignalClient> {
-        let client = self.clients.remove(fp);
-        if client.is_some() {
-            info!(fingerprint = %fp, "signal client unregistered");
-        }
-        client
-    }
-
-    /// Look up a client by fingerprint.
-    pub fn get(&self, fp: &str) -> Option<&SignalClient> {
-        self.clients.get(fp)
-    }
-
-    /// Check if a fingerprint is online.
-    pub fn is_online(&self, fp: &str) -> bool {
-        self.clients.contains_key(fp)
-    }
-
-    /// Send a signal message to a client by fingerprint.
-    pub async fn send_to(&self, fp: &str, msg: &SignalMessage) -> Result<(), String> {
-        match self.clients.get(fp) {
-            Some(client) => {
-                client.transport.send_signal(msg).await
-                    .map_err(|e| format!("send to {fp}: {e}"))
-            }
-            None => Err(format!("{fp} not online")),
-        }
-    }
-
-    /// Number of connected signaling clients.
-    pub fn online_count(&self) -> usize {
-        self.clients.len()
-    }
-
-    /// List all online fingerprints.
-    pub fn online_fingerprints(&self) -> Vec<&str> {
-        self.clients.keys().map(|s| s.as_str()).collect()
-    }
-
-    /// Get alias for a fingerprint.
-    pub fn alias(&self, fp: &str) -> Option<&str> {
-        self.clients.get(fp).and_then(|c| c.alias.as_deref())
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn register_unregister() {
-        let hub = SignalHub::new();
-        assert_eq!(hub.online_count(), 0);
-        assert!(!hub.is_online("alice"));
-
-        // Can't easily construct QuinnTransport in a unit test,
-        // so we just test the HashMap logic conceptually.
-        // Integration tests cover the full flow.
-    }
-}

crates/wzp-transport/Cargo.toml

@@ -16,9 +16,6 @@ async-trait = { workspace = true }
 serde_json = "1"
 rustls = { version = "0.23", default-features = false, features = ["ring", "std"] }
 rcgen = "0.13"
-ed25519-dalek = { workspace = true }
-hkdf = { workspace = true }
-sha2 = { workspace = true }
 
 [dev-dependencies]
 tokio = { workspace = true, features = ["rt-multi-thread", "macros"] }

crates/wzp-transport/src/config.rs

@@ -6,74 +6,20 @@ use std::time::Duration;
 use quinn::crypto::rustls::QuicClientConfig;
 use quinn::crypto::rustls::QuicServerConfig;
 
-/// Create a server configuration with a self-signed certificate (random keypair).
+/// Create a server configuration with a self-signed certificate (for testing).
 ///
-/// The certificate changes on every call. Use `server_config_from_seed` for
+/// Tunes QUIC transport parameters for lossy VoIP:
-/// a deterministic certificate that survives relay restarts.
+/// - 30s idle timeout
+/// - 5s keep-alive interval
+/// - DATAGRAM extension enabled
+/// - Conservative flow control for bandwidth-constrained links
 pub fn server_config() -> (quinn::ServerConfig, Vec<u8>) {
     let cert_key = rcgen::generate_simple_self_signed(vec!["localhost".to_string()])
         .expect("failed to generate self-signed cert");
     let cert_der = rustls::pki_types::CertificateDer::from(cert_key.cert);
     let key_der =
         rustls::pki_types::PrivateKeyDer::try_from(cert_key.key_pair.serialize_der()).unwrap();
-    build_server_config(cert_der, key_der)
-}
 
-/// Create a server configuration with a deterministic self-signed certificate
-/// derived from a 32-byte seed. Same seed = same cert = same TLS fingerprint.
-pub fn server_config_from_seed(seed: &[u8; 32]) -> (quinn::ServerConfig, Vec<u8>) {
-    use ed25519_dalek::pkcs8::EncodePrivateKey;
-    use ed25519_dalek::SigningKey;
-    use hkdf::Hkdf;
-    use sha2::Sha256;
-
-    // Derive Ed25519 key bytes from seed via HKDF
-    let hk = Hkdf::<Sha256>::new(None, seed);
-    let mut ed_bytes = [0u8; 32];
-    hk.expand(b"wzp-tls-ed25519", &mut ed_bytes)
-        .expect("HKDF expand failed");
-
-    // Create Ed25519 signing key and export as PKCS8 DER
-    let signing_key = SigningKey::from_bytes(&ed_bytes);
-    let pkcs8_doc = signing_key.to_pkcs8_der()
-        .expect("failed to encode Ed25519 key as PKCS8");
-    let key_der_for_rcgen = rustls::pki_types::PrivateKeyDer::try_from(pkcs8_doc.as_bytes().to_vec())
-        .expect("failed to wrap PKCS8 DER");
-
-    // Create rcgen KeyPair from DER
-    let key_pair = rcgen::KeyPair::from_der_and_sign_algo(
-        &key_der_for_rcgen,
-        &rcgen::PKCS_ED25519,
-    )
-    .expect("failed to create KeyPair from seed-derived Ed25519 key");
-
-    // Build self-signed cert with this deterministic keypair
-    let params = rcgen::CertificateParams::new(vec!["localhost".to_string()])
-        .expect("failed to create CertificateParams");
-    let cert = params.self_signed(&key_pair).expect("failed to self-sign cert");
-    let cert_der = rustls::pki_types::CertificateDer::from(cert.der().to_vec());
-    let key_der = rustls::pki_types::PrivateKeyDer::try_from(key_pair.serialize_der())
-        .expect("failed to serialize key DER");
-
-    build_server_config(cert_der, key_der)
-}
-
-/// Compute a hex-formatted SHA-256 fingerprint of a DER-encoded certificate.
-///
-/// Format: `xx:xx:xx:xx:...` (32 bytes = 64 hex chars with colons).
-pub fn tls_fingerprint(cert_der: &[u8]) -> String {
-    use sha2::{Sha256, Digest};
-    let hash = Sha256::digest(cert_der);
-    hash.iter()
-        .map(|b| format!("{b:02x}"))
-        .collect::<Vec<_>>()
-        .join(":")
-}
-
-fn build_server_config(
-    cert_der: rustls::pki_types::CertificateDer<'static>,
-    key_der: rustls::pki_types::PrivateKeyDer<'static>,
-) -> (quinn::ServerConfig, Vec<u8>) {
     let mut server_crypto = rustls::ServerConfig::builder()
         .with_no_client_auth()
         .with_single_cert(vec![cert_der.clone()], key_der)

crates/wzp-transport/src/lib.rs

@@ -22,13 +22,8 @@ pub mod path_monitor;
 pub mod quic;
 pub mod reliable;
 
-pub use config::{client_config, server_config, server_config_from_seed, tls_fingerprint};
+pub use config::{client_config, server_config};
 pub use connection::{accept, connect, create_endpoint};
 pub use path_monitor::PathMonitor;
 pub use quic::QuinnTransport;
 pub use wzp_proto::{MediaTransport, PathQuality, TransportError};
-
-// Re-export the quinn Endpoint type so downstream crates (wzp-desktop) can
-// thread a shared endpoint between signaling and media connections without
-// needing to depend on quinn directly.
-pub use quinn::Endpoint;

crates/wzp-transport/src/quic.rs

@@ -33,13 +33,6 @@ impl QuinnTransport {
         &self.connection
     }
 
-    /// Send raw bytes as a QUIC datagram (no MediaPacket framing).
-    pub fn send_raw_datagram(&self, data: &[u8]) -> Result<(), TransportError> {
-        self.connection
-            .send_datagram(bytes::Bytes::copy_from_slice(data))
-            .map_err(|e| TransportError::Internal(format!("datagram: {e}")))
-    }
-
     /// Close the QUIC connection immediately (synchronous, no async needed).
     /// The relay will detect the close and remove this participant from the room.
     pub fn close_now(&self) {
@@ -143,7 +136,7 @@ impl MediaTransport for QuinnTransport {
             }
         };
 
-        match datagram::deserialize_media(data.clone()) {
+        match datagram::deserialize_media(data) {
             Some(packet) => {
                 // Record receive observation
                 {
@@ -156,10 +149,8 @@ impl MediaTransport for QuinnTransport {
                 Ok(Some(packet))
             }
             None => {
-                tracing::warn!(len = data.len(), "skipping malformed media datagram, continuing");
+                tracing::warn!("received malformed media datagram");
-                // Don't return Ok(None) — that signals connection closed.
+                Ok(None)
-                // Recurse to read the next datagram instead.
-                Box::pin(self.recv_media()).await
             }
         }
     }

crates/wzp-web/static/wasm/package.json

@@ -1,16 +0,0 @@
-{
-  "name": "wzp-wasm",
-  "type": "module",
-  "description": "WarzonePhone WASM bindings — FEC (RaptorQ) + crypto (ChaCha20-Poly1305, X25519)",
-  "version": "0.1.0",
-  "files": [
-    "wzp_wasm_bg.wasm",
-    "wzp_wasm.js",
-    "wzp_wasm.d.ts"
-  ],
-  "main": "wzp_wasm.js",
-  "types": "wzp_wasm.d.ts",
-  "sideEffects": [
-    "./snippets/*"
-  ]
-}

crates/wzp-web/static/wasm/wzp_wasm.d.ts

@@ -1,169 +0,0 @@
-/* tslint:disable */
-/* eslint-disable */
-
-/**
- * Symmetric encryption session using ChaCha20-Poly1305.
- *
- * Mirrors `wzp-crypto::session::ChaChaSession` for WASM.  Nonce derivation
- * and key setup are identical so WASM and native peers interoperate.
- */
-export class WzpCryptoSession {
-    free(): void;
-    [Symbol.dispose](): void;
-    /**
-     * Decrypt a media payload with AAD.
-     *
-     * Returns plaintext on success, or throws on auth failure.
-     */
-    decrypt(header_aad: Uint8Array, ciphertext: Uint8Array): Uint8Array;
-    /**
-     * Encrypt a media payload with AAD (typically the 12-byte MediaHeader).
-     *
-     * Returns `ciphertext || poly1305_tag` (plaintext.len() + 16 bytes).
-     */
-    encrypt(header_aad: Uint8Array, plaintext: Uint8Array): Uint8Array;
-    /**
-     * Create from a 32-byte shared secret (output of `WzpKeyExchange.derive_shared_secret`).
-     */
-    constructor(shared_secret: Uint8Array);
-    /**
-     * Current receive sequence number (for diagnostics / UI stats).
-     */
-    recv_seq(): number;
-    /**
-     * Current send sequence number (for diagnostics / UI stats).
-     */
-    send_seq(): number;
-}
-
-export class WzpFecDecoder {
-    free(): void;
-    [Symbol.dispose](): void;
-    /**
-     * Feed a received symbol.
-     *
-     * Returns the decoded block (concatenated original frames, unpadded) if
-     * enough symbols have been received to recover the block, or `undefined`.
-     */
-    add_symbol(block_id: number, symbol_idx: number, _is_repair: boolean, data: Uint8Array): Uint8Array | undefined;
-    /**
-     * Create a new FEC decoder.
-     *
-     * * `block_size` — expected number of source symbols per block.
-     * * `symbol_size` — padded byte size of each symbol (must match encoder).
-     */
-    constructor(block_size: number, symbol_size: number);
-}
-
-export class WzpFecEncoder {
-    free(): void;
-    [Symbol.dispose](): void;
-    /**
-     * Add a source symbol (audio frame).
-     *
-     * Returns encoded packets (all source + repair) when the block is complete,
-     * or `undefined` if the block is still accumulating.
-     *
-     * Each returned packet carries the 3-byte header:
-     *   `[block_id][symbol_idx][is_repair]` followed by `symbol_size` bytes.
-     */
-    add_symbol(data: Uint8Array): Uint8Array | undefined;
-    /**
-     * Force-flush the current (possibly partial) block.
-     *
-     * Returns all source + repair symbols with headers, or empty vec if no
-     * symbols have been accumulated.
-     */
-    flush(): Uint8Array;
-    /**
-     * Create a new FEC encoder.
-     *
-     * * `block_size` — number of source symbols (audio frames) per FEC block.
-     * * `symbol_size` — padded byte size of each symbol (default 256).
-     */
-    constructor(block_size: number, symbol_size: number);
-}
-
-/**
- * X25519 key exchange: generate ephemeral keypair and derive shared secret.
- *
- * Usage from JS:
- * ```js
- * const kx = new WzpKeyExchange();
- * const ourPub = kx.public_key();         // Uint8Array(32)
- * // ... send ourPub to peer, receive peerPub ...
- * const secret = kx.derive_shared_secret(peerPub); // Uint8Array(32)
- * const session = new WzpCryptoSession(secret);
- * ```
- */
-export class WzpKeyExchange {
-    free(): void;
-    [Symbol.dispose](): void;
-    /**
-     * Derive a 32-byte session key from the peer's public key.
-     *
-     * Raw DH output is expanded via HKDF-SHA256 with info="warzone-session-key",
-     * matching `wzp-crypto::handshake::WarzoneKeyExchange::derive_session`.
-     */
-    derive_shared_secret(peer_public: Uint8Array): Uint8Array;
-    /**
-     * Generate a new random X25519 keypair.
-     */
-    constructor();
-    /**
-     * Our public key (32 bytes).
-     */
-    public_key(): Uint8Array;
-}
-
-export type InitInput = RequestInfo | URL | Response | BufferSource | WebAssembly.Module;
-
-export interface InitOutput {
-    readonly memory: WebAssembly.Memory;
-    readonly __wbg_wzpcryptosession_free: (a: number, b: number) => void;
-    readonly __wbg_wzpfecdecoder_free: (a: number, b: number) => void;
-    readonly __wbg_wzpfecencoder_free: (a: number, b: number) => void;
-    readonly __wbg_wzpkeyexchange_free: (a: number, b: number) => void;
-    readonly wzpcryptosession_decrypt: (a: number, b: number, c: number, d: number, e: number) => [number, number, number, number];
-    readonly wzpcryptosession_encrypt: (a: number, b: number, c: number, d: number, e: number) => [number, number, number, number];
-    readonly wzpcryptosession_new: (a: number, b: number) => [number, number, number];
-    readonly wzpcryptosession_recv_seq: (a: number) => number;
-    readonly wzpcryptosession_send_seq: (a: number) => number;
-    readonly wzpfecdecoder_add_symbol: (a: number, b: number, c: number, d: number, e: number, f: number) => [number, number];
-    readonly wzpfecdecoder_new: (a: number, b: number) => number;
-    readonly wzpfecencoder_add_symbol: (a: number, b: number, c: number) => [number, number];
-    readonly wzpfecencoder_flush: (a: number) => [number, number];
-    readonly wzpfecencoder_new: (a: number, b: number) => number;
-    readonly wzpkeyexchange_derive_shared_secret: (a: number, b: number, c: number) => [number, number, number, number];
-    readonly wzpkeyexchange_new: () => number;
-    readonly wzpkeyexchange_public_key: (a: number) => [number, number];
-    readonly __wbindgen_exn_store: (a: number) => void;
-    readonly __externref_table_alloc: () => number;
-    readonly __wbindgen_externrefs: WebAssembly.Table;
-    readonly __wbindgen_malloc: (a: number, b: number) => number;
-    readonly __externref_table_dealloc: (a: number) => void;
-    readonly __wbindgen_free: (a: number, b: number, c: number) => void;
-    readonly __wbindgen_start: () => void;
-}
-
-export type SyncInitInput = BufferSource | WebAssembly.Module;
-
-/**
- * Instantiates the given `module`, which can either be bytes or
- * a precompiled `WebAssembly.Module`.
- *
- * @param {{ module: SyncInitInput }} module - Passing `SyncInitInput` directly is deprecated.
- *
- * @returns {InitOutput}
- */
-export function initSync(module: { module: SyncInitInput } | SyncInitInput): InitOutput;
-
-/**
- * If `module_or_path` is {RequestInfo} or {URL}, makes a request and
- * for everything else, calls `WebAssembly.instantiate` directly.
- *
- * @param {{ module_or_path: InitInput | Promise<InitInput> }} module_or_path - Passing `InitInput` directly is deprecated.
- *
- * @returns {Promise<InitOutput>}
- */
-export default function __wbg_init (module_or_path?: { module_or_path: InitInput | Promise<InitInput> } | InitInput | Promise<InitInput>): Promise<InitOutput>;

crates/wzp-web/static/wasm/wzp_wasm_bg.wasm.d.ts

@@ -1,27 +0,0 @@
-/* tslint:disable */
-/* eslint-disable */
-export const memory: WebAssembly.Memory;
-export const __wbg_wzpcryptosession_free: (a: number, b: number) => void;
-export const __wbg_wzpfecdecoder_free: (a: number, b: number) => void;
-export const __wbg_wzpfecencoder_free: (a: number, b: number) => void;
-export const __wbg_wzpkeyexchange_free: (a: number, b: number) => void;
-export const wzpcryptosession_decrypt: (a: number, b: number, c: number, d: number, e: number) => [number, number, number, number];
-export const wzpcryptosession_encrypt: (a: number, b: number, c: number, d: number, e: number) => [number, number, number, number];
-export const wzpcryptosession_new: (a: number, b: number) => [number, number, number];
-export const wzpcryptosession_recv_seq: (a: number) => number;
-export const wzpcryptosession_send_seq: (a: number) => number;
-export const wzpfecdecoder_add_symbol: (a: number, b: number, c: number, d: number, e: number, f: number) => [number, number];
-export const wzpfecdecoder_new: (a: number, b: number) => number;
-export const wzpfecencoder_add_symbol: (a: number, b: number, c: number) => [number, number];
-export const wzpfecencoder_flush: (a: number) => [number, number];
-export const wzpfecencoder_new: (a: number, b: number) => number;
-export const wzpkeyexchange_derive_shared_secret: (a: number, b: number, c: number) => [number, number, number, number];
-export const wzpkeyexchange_new: () => number;
-export const wzpkeyexchange_public_key: (a: number) => [number, number];
-export const __wbindgen_exn_store: (a: number) => void;
-export const __externref_table_alloc: () => number;
-export const __wbindgen_externrefs: WebAssembly.Table;
-export const __wbindgen_malloc: (a: number, b: number) => number;
-export const __externref_table_dealloc: (a: number) => void;
-export const __wbindgen_free: (a: number, b: number, c: number) => void;
-export const __wbindgen_start: () => void;

desktop/.gitignore

@@ -1,2 +0,0 @@
-node_modules/
-dist/

desktop/.vite/deps/_metadata.json

@@ -1,8 +0,0 @@
-{
-  "hash": "9046c0bf",
-  "configHash": "ef0fc96f",
-  "lockfileHash": "d66891b1",
-  "browserHash": "8171ed59",
-  "optimized": {},
-  "chunks": {}
-}

desktop/.vite/deps/package.json

@@ -1,3 +0,0 @@
-{
-  "type": "module"
-}

desktop/index.html

@@ -1,239 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <meta
-      name="viewport"
-      content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, viewport-fit=cover"
-    />
-    <title>WarzonePhone</title>
-    <link rel="stylesheet" href="/src/style.css" />
-  </head>
-  <body>
-    <div id="app">
-      <!-- Connect screen -->
-      <div id="connect-screen">
-        <h1>WarzonePhone</h1>
-        <p class="subtitle">Encrypted Voice</p>
-        <div class="form">
-          <label>Relay
-            <button id="relay-selected" class="relay-selected" type="button">
-              <span id="relay-dot" class="dot"></span>
-              <span id="relay-label">Select relay...</span>
-              <span class="arrow">&#9881;</span>
-            </button>
-          </label>
-          <label>Room
-            <input id="room" type="text" value="general" />
-          </label>
-          <label>Alias
-            <input id="alias" type="text" placeholder="your name" />
-          </label>
-          <div class="form-row">
-            <label class="checkbox">
-              <input id="os-aec" type="checkbox" checked />
-              OS Echo Cancel
-            </label>
-            <button id="settings-btn-home" class="icon-btn" title="Settings (Cmd+,)">&#9881;</button>
-          </div>
-          <!-- Mode toggle -->
-          <div class="mode-toggle" style="display:flex;gap:8px;margin-bottom:8px;">
-            <button id="mode-room" class="mode-btn active" style="flex:1">Room</button>
-            <button id="mode-direct" class="mode-btn" style="flex:1">Direct Call</button>
-          </div>
-
-          <!-- Room mode (default) -->
-          <div id="room-mode">
-            <button id="connect-btn" class="primary">Connect</button>
-          </div>
-
-          <!-- Direct call mode -->
-          <div id="direct-mode" class="hidden">
-            <button id="register-btn" class="primary" style="background:#2196F3">Register on Relay</button>
-            <div id="direct-registered" class="hidden" style="margin-top:12px">
-              <div class="direct-registered-header">
-                <p style="color:var(--green);font-size:13px;margin:0">&#x2705; Registered — waiting for calls</p>
-                <button id="deregister-btn" class="secondary-btn small">Deregister</button>
-              </div>
-              <div id="incoming-call-panel" class="hidden" style="background:#1B5E20;padding:12px;border-radius:8px;margin:8px 0">
-                <p style="font-weight:bold;margin:0 0 4px 0">Incoming Call</p>
-                <p id="incoming-caller" style="font-size:12px;opacity:0.8;margin:0 0 8px 0">From: unknown</p>
-                <div style="display:flex;gap:8px">
-                  <button id="accept-call-btn" style="flex:1;background:var(--green);color:white;border:none;padding:8px;border-radius:6px;cursor:pointer">Accept</button>
-                  <button id="reject-call-btn" style="flex:1;background:var(--red);color:white;border:none;padding:8px;border-radius:6px;cursor:pointer">Reject</button>
-                </div>
-              </div>
-
-              <!-- Recent contacts -->
-              <div id="recent-contacts-section" class="hidden">
-                <div class="history-header">Recent contacts</div>
-                <div id="recent-contacts-list" class="history-list"></div>
-              </div>
-
-              <!-- Call history -->
-              <div id="call-history-section" class="hidden">
-                <div class="history-header">
-                  History
-                  <button id="clear-history-btn" class="link-btn">clear</button>
-                </div>
-                <div id="call-history-list" class="history-list"></div>
-              </div>
-
-              <label style="margin-top:8px">Call by fingerprint
-                <input id="target-fp" type="text" placeholder="xxxx:xxxx:xxxx:..." />
-              </label>
-              <button id="call-btn" class="primary" style="margin-top:8px">Call</button>
-              <p id="call-status-text" style="color:var(--yellow);font-size:13px;margin-top:4px"></p>
-            </div>
-          </div>
-
-          <p id="connect-error" class="error"></p>
-        </div>
-        <div class="identity-info">
-          <span id="my-identicon"></span>
-          <span id="my-fingerprint" class="fp-display"></span>
-        </div>
-        <div class="recent-rooms" id="recent-rooms"></div>
-      </div>
-
-      <!-- In-call screen -->
-      <div id="call-screen" class="hidden">
-        <div class="call-header">
-          <div class="call-header-row">
-            <div id="room-name" class="room-name"></div>
-            <button id="settings-btn-call" class="icon-btn small" title="Settings (Cmd+,)">&#9881;</button>
-          </div>
-          <div class="call-meta">
-            <span id="call-status" class="status-dot"></span>
-            <span id="call-timer" class="call-timer">0:00</span>
-          </div>
-        </div>
-        <div class="level-meter">
-          <div id="level-bar" class="level-bar-fill"></div>
-        </div>
-        <div id="participants" class="participants"></div>
-        <div class="controls">
-          <button id="mic-btn" class="control-btn" title="Toggle Mic (m)">
-            <span class="icon" id="mic-icon">Mic</span>
-          </button>
-          <button id="hangup-btn" class="control-btn hangup" title="Hang Up (q)">
-            <span class="icon">End</span>
-          </button>
-          <button id="spk-btn" class="control-btn" title="Toggle Speaker (s)">
-            <span class="icon" id="spk-icon">Spk</span>
-          </button>
-        </div>
-        <div id="stats" class="stats"></div>
-      </div>
-
-      <!-- Settings panel -->
-      <div id="settings-panel" class="hidden">
-        <div class="settings-card">
-          <div class="settings-header">
-            <h2>Settings</h2>
-            <button id="settings-close" class="icon-btn">&times;</button>
-          </div>
-          <div class="settings-section">
-            <h3>Connection</h3>
-            <label>Default Room
-              <input id="s-room" type="text" />
-            </label>
-            <label>Alias
-              <input id="s-alias" type="text" />
-            </label>
-          </div>
-          <div class="settings-section">
-            <h3>Audio</h3>
-            <div class="quality-control">
-              <div class="quality-header">
-                <span class="setting-label">QUALITY</span>
-                <span id="s-quality-label" class="quality-label">Auto</span>
-              </div>
-              <input id="s-quality" type="range" min="0" max="7" step="1" value="3" class="quality-slider" />
-              <div class="quality-ticks">
-                <span>64k</span>
-                <span>48k</span>
-                <span>32k</span>
-                <span>Auto</span>
-                <span>24k</span>
-                <span>6k</span>
-                <span>C2</span>
-                <span>1.2k</span>
-              </div>
-            </div>
-            <label class="checkbox">
-              <input id="s-os-aec" type="checkbox" />
-              OS Echo Cancellation (macOS VoiceProcessingIO)
-            </label>
-            <label class="checkbox">
-              <input id="s-agc" type="checkbox" checked />
-              Automatic Gain Control
-            </label>
-            <label class="checkbox">
-              <input id="s-dred-debug" type="checkbox" />
-              DRED debug logs (verbose, dev only)
-            </label>
-          </div>
-          <div class="settings-section">
-            <h3>Identity</h3>
-            <div class="setting-row">
-              <span class="setting-label">Fingerprint</span>
-              <span id="s-fingerprint" class="fp-display-large"></span>
-            </div>
-            <div class="setting-row">
-              <span class="setting-label">Identity file</span>
-              <span class="fp-display">~/.wzp/identity</span>
-            </div>
-          </div>
-          <div class="settings-section">
-            <h3>Recent Rooms</h3>
-            <div id="s-recent-rooms" class="recent-rooms-list"></div>
-            <button id="s-clear-recent" class="secondary-btn">Clear History</button>
-          </div>
-          <button id="settings-save" class="primary">Save</button>
-        </div>
-      </div>
-
-      <!-- Manage Relays dialog -->
-      <div id="relay-dialog" class="hidden">
-        <div class="settings-card relay-dialog-card">
-          <div class="settings-header">
-            <h2>Manage Relays</h2>
-            <button id="relay-dialog-close" class="icon-btn">&times;</button>
-          </div>
-          <div id="relay-dialog-list" class="relay-dialog-list"></div>
-          <div class="relay-add-row">
-            <div class="relay-add-inputs">
-              <input id="relay-add-name" type="text" placeholder="Name" />
-              <input id="relay-add-addr" type="text" placeholder="host:port" />
-            </div>
-            <button id="relay-add-btn" class="primary">Add Relay</button>
-          </div>
-        </div>
-      </div>
-      <!-- Key changed warning dialog -->
-      <div id="key-warning" class="hidden">
-        <div class="settings-card key-warning-card">
-          <div class="key-warning-icon">&#9888;</div>
-          <h2>Server Key Changed</h2>
-          <p class="key-warning-text">The relay's identity has changed since you last connected. This usually happens when the server was restarted, but could also indicate a security issue.</p>
-          <div class="key-warning-fps">
-            <div class="key-fp-row">
-              <span class="key-fp-label">Previously known</span>
-              <code id="kw-old-fp" class="key-fp"></code>
-            </div>
-            <div class="key-fp-row">
-              <span class="key-fp-label">New key</span>
-              <code id="kw-new-fp" class="key-fp"></code>
-            </div>
-          </div>
-          <div class="key-warning-actions">
-            <button id="kw-accept" class="primary">Accept New Key</button>
-            <button id="kw-cancel" class="secondary-btn">Cancel</button>
-          </div>
-        </div>
-      </div>
-    </div>
-    <script type="module" src="/src/main.ts"></script>
-  </body>
-</html>

desktop/package.json

@@ -1,19 +0,0 @@
-{
-  "name": "wzp-desktop",
-  "private": true,
-  "version": "0.1.0",
-  "type": "module",
-  "scripts": {
-    "dev": "vite",
-    "build": "vite build",
-    "tauri": "tauri"
-  },
-  "dependencies": {
-    "@tauri-apps/api": "^2"
-  },
-  "devDependencies": {
-    "typescript": "^5",
-    "vite": "^6",
-    "@tauri-apps/cli": "^2"
-  }
-}

desktop/src-tauri/Cargo.toml

@@ -1,107 +0,0 @@
-[package]
-name = "wzp-desktop"
-version = "0.1.0"
-edition = "2024"
-description = "WarzonePhone Desktop — encrypted VoIP client"
-default-run = "wzp-desktop"
-
-# Library target — required for Tauri mobile (Android/iOS link the app as a cdylib)
-# and also used by the desktop binary below.
-#
-# `staticlib` was DROPPED from crate-type because rust-lang/rust#104707
-# documents that having staticlib alongside cdylib leaks non-exported
-# symbols from staticlibs into the cdylib. Bionic's private `__init_tcb`
-# / `pthread_create` symbols end up bound LOCALLY inside our .so instead
-# of resolved dynamically against libc.so at dlopen time — which crashes
-# at launch as soon as tao tries to std::thread::spawn() from the JNI
-# onCreate callback. The legacy wzp-android crate uses ["cdylib", "rlib"]
-# and runs fine on the same phone with the same NDK + Rust toolchain.
-#
-# iOS Tauri builds that actually need staticlib can re-add it behind a
-# target cfg if we ever ship on iOS.
-[lib]
-name = "wzp_desktop_lib"
-crate-type = ["cdylib", "rlib"]
-
-[[bin]]
-name = "wzp-desktop"
-path = "src/main.rs"
-
-[build-dependencies]
-tauri-build = { version = "2", features = [] }
-# cc is no longer needed — all C++ moved to crates/wzp-native (built with
-# cargo-ndk and loaded via libloading at runtime). wzp-desktop's .so on
-# Android is now pure Rust.
-
-[dependencies]
-tauri = { version = "2", features = [] }
-tauri-plugin-shell = "2"
-serde = { version = "1", features = ["derive"] }
-serde_json = "1"
-tokio = { version = "1", features = ["full"] }
-tracing = "0.1"
-tracing-subscriber = "0.3"
-anyhow = "1"
-rustls = { version = "0.23", default-features = false, features = ["ring", "std"] }
-
-# WarzonePhone crates — protocol layer is platform-independent
-wzp-proto = { path = "../../crates/wzp-proto" }
-wzp-codec = { path = "../../crates/wzp-codec" }
-wzp-fec = { path = "../../crates/wzp-fec" }
-wzp-crypto = { path = "../../crates/wzp-crypto" }
-wzp-transport = { path = "../../crates/wzp-transport" }
-
-# wzp-client pulls in CPAL on every desktop target and, additionally on
-# macOS, VoiceProcessingIO (coreaudio-rs behind the "vpio" feature). The
-# vpio feature MUST NOT be enabled on Windows / Linux because coreaudio-rs
-# is Apple-framework-only and will fail to build. Task #24 will add a
-# matching Windows Voice Capture DSP path behind its own feature; until
-# then, Windows desktops use plain CPAL with AEC disabled.
-
-# macOS: CPAL + VoiceProcessingIO (hardware AEC via Core Audio).
-[target.'cfg(target_os = "macos")'.dependencies]
-wzp-client = { path = "../../crates/wzp-client", features = ["audio", "vpio"] }
-
-# Windows: CPAL for playback + direct WASAPI for capture with OS-level
-# AEC (AudioCategory_Communications). The wzp-client `windows-aec`
-# feature swaps the default CPAL AudioCapture for a WASAPI one that
-# opens the mic under AudioCategory_Communications, turning on Windows's
-# communications audio processing chain (AEC, NS, AGC). The reference
-# signal for AEC is the system render mix, so echo from our CPAL
-# playback is cancelled automatically without extra plumbing.
-[target.'cfg(target_os = "windows")'.dependencies]
-wzp-client = { path = "../../crates/wzp-client", features = ["audio", "windows-aec"] }
-
-# Linux: CPAL playback+capture baseline. AEC is enabled via the top-level
-# `linux-aec` feature in wzp-desktop, which forwards to wzp-client/linux-aec.
-# Keeping it opt-in at the wzp-desktop level (rather than forcing it always
-# on here) lets `cargo tauri build` produce two variants from the same
-# source tree — a noAEC baseline and an AEC build — by toggling the feature
-# at build time: `cargo tauri build -- --features wzp-desktop/linux-aec`.
-[target.'cfg(target_os = "linux")'.dependencies]
-wzp-client = { path = "../../crates/wzp-client", features = ["audio"] }
-
-# Android: no CPAL, no vpio — audio goes through the standalone wzp-native
-# cdylib that we dlopen via libloading at runtime. See the wzp_native
-# module in src/.
-[target.'cfg(target_os = "android")'.dependencies]
-wzp-client = { path = "../../crates/wzp-client", default-features = false }
-# libloading: runtime dlopen of libwzp_native.so — the standalone cdylib
-# crate that owns all C++ (Oboe bridge). Keeps wzp-desktop's .so free of
-# any C/C++ static archives that would otherwise leak bionic's internal
-# pthread_create into our cdylib and trigger the __init_tcb crash.
-libloading = "0.8"
-# jni + ndk-context: called from android_audio.rs to invoke
-# AudioManager.setSpeakerphoneOn on the JVM side at runtime, so the
-# Oboe playout stream (opened with Usage::VoiceCommunication) can route
-# between earpiece and loud speaker without restarting.
-jni = "0.21"
-ndk-context = "0.1"
-
-[features]
-default = ["custom-protocol"]
-custom-protocol = ["tauri/custom-protocol"]
-# linux-aec: forwards to wzp-client/linux-aec so `cargo tauri build -- --features
-# wzp-desktop/linux-aec` enables the WebRTC AEC3 backend on Linux. No-op on
-# other targets because wzp-client/linux-aec is itself cfg(target_os = "linux").
-linux-aec = ["wzp-client/linux-aec"]

desktop/src-tauri/Info.plist

@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-    <!--
-      Custom Info.plist keys merged into the bundled WarzonePhone.app by
-      tauri-bundler. The base Info.plist (CFBundleIdentifier, version,
-      etc.) is generated from tauri.conf.json — only put *additional*
-      keys here.
-
-      NSMicrophoneUsageDescription is required by macOS TCC for any
-      app that opens an audio input unit. Without this string the OS
-      silently denies CoreAudio capture (input callbacks return zeros)
-      and the app never appears in System Settings → Privacy &
-      Security → Microphone. This was the root cause of the desktop
-      mic regression where phones could not hear the desktop client.
-    -->
-    <key>NSMicrophoneUsageDescription</key>
-    <string>WarzonePhone needs microphone access to transmit your voice during calls.</string>
-</dict>
-</plist>

desktop/src-tauri/build.rs

@@ -1,26 +0,0 @@
-use std::process::Command;
-
-fn main() {
-    // Capture short git hash so the running app can prove which build it is.
-    // Falls back to "unknown" if git isn't available (e.g. when building from
-    // a tarball without a .git dir).
-    let git_hash = Command::new("git")
-        .args(["rev-parse", "--short", "HEAD"])
-        .output()
-        .ok()
-        .filter(|o| o.status.success())
-        .and_then(|o| String::from_utf8(o.stdout).ok())
-        .map(|s| s.trim().to_string())
-        .unwrap_or_else(|| "unknown".into());
-
-    println!("cargo:rustc-env=WZP_GIT_HASH={git_hash}");
-    println!("cargo:rerun-if-changed=../../.git/HEAD");
-    println!("cargo:rerun-if-changed=../../.git/refs/heads");
-
-    // No cc::Build of ANY kind on Android — all C++ lives in the standalone
-    // `wzp-native` crate which is built separately with cargo-ndk and loaded
-    // via libloading at runtime. See docs/incident-tauri-android-init-tcb.md
-    // for why this split exists.
-
-    tauri_build::build()
-}

desktop/src-tauri/capabilities/default.json

@@ -1,26 +0,0 @@
-{
-  "$schema": "../gen/schemas/desktop-schema.json",
-  "identifier": "default",
-  "description": "Default capability — grants core APIs (events, path, window, app, clipboard) to the main window on every platform we ship to.",
-  "windows": ["main"],
-  "platforms": [
-    "linux",
-    "macOS",
-    "windows",
-    "android",
-    "iOS"
-  ],
-  "permissions": [
-    "core:default",
-    "core:event:default",
-    "core:event:allow-listen",
-    "core:event:allow-unlisten",
-    "core:event:allow-emit",
-    "core:event:allow-emit-to",
-    "core:path:default",
-    "core:window:default",
-    "core:app:default",
-    "core:webview:default",
-    "shell:default"
-  ]
-}

desktop/src-tauri/gen/android/app/src/main/AndroidManifest.xml

@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-    <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.RECORD_AUDIO" />
-    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
-    <uses-feature android:name="android.hardware.microphone" android:required="true" />
-
-    <!-- AndroidTV support -->
-    <uses-feature android:name="android.software.leanback" android:required="false" />
-
-    <application
-        android:icon="@mipmap/ic_launcher"
-        android:label="@string/app_name"
-        android:theme="@style/Theme.wzp_desktop"
-        android:usesCleartextTraffic="${usesCleartextTraffic}">
-        <activity
-            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|smallestScreenSize|screenLayout|uiMode"
-            android:launchMode="singleTask"
-            android:label="@string/main_activity_title"
-            android:name=".MainActivity"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-                <!-- AndroidTV support -->
-                <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
-            </intent-filter>
-        </activity>
-
-        <provider
-          android:name="androidx.core.content.FileProvider"
-          android:authorities="${applicationId}.fileprovider"
-          android:exported="false"
-          android:grantUriPermissions="true">
-          <meta-data
-            android:name="android.support.FILE_PROVIDER_PATHS"
-            android:resource="@xml/file_paths" />
-        </provider>
-    </application>
-</manifest>

desktop/src-tauri/gen/android/app/src/main/java/com/wzp/desktop/MainActivity.kt

@@ -1,101 +0,0 @@
-package com.wzp.desktop
-
-import android.Manifest
-import android.content.Context
-import android.content.pm.PackageManager
-import android.media.AudioManager
-import android.os.Bundle
-import android.util.Log
-import androidx.activity.enableEdgeToEdge
-import androidx.core.app.ActivityCompat
-import androidx.core.content.ContextCompat
-
-class MainActivity : TauriActivity() {
-  companion object {
-    private const val TAG = "WzpMainActivity"
-    private const val AUDIO_PERMISSIONS_REQUEST = 4242
-    private val REQUIRED_AUDIO_PERMISSIONS = arrayOf(
-      Manifest.permission.RECORD_AUDIO,
-      Manifest.permission.MODIFY_AUDIO_SETTINGS
-    )
-  }
-
-  override fun onCreate(savedInstanceState: Bundle?) {
-    enableEdgeToEdge()
-    super.onCreate(savedInstanceState)
-
-    // Request RECORD_AUDIO early so Oboe (inside libwzp_native.so) can open
-    // the AAudio input stream without silently failing. The grant is
-    // persisted, so after the first launch the dialog no longer appears.
-    // MODIFY_AUDIO_SETTINGS is needed to switch AudioManager mode + speaker.
-    val needsRequest = REQUIRED_AUDIO_PERMISSIONS.any {
-      ContextCompat.checkSelfPermission(this, it) != PackageManager.PERMISSION_GRANTED
-    }
-    if (needsRequest) {
-      Log.i(TAG, "requesting audio permissions")
-      ActivityCompat.requestPermissions(this, REQUIRED_AUDIO_PERMISSIONS, AUDIO_PERMISSIONS_REQUEST)
-    } else {
-      Log.i(TAG, "audio permissions already granted")
-      configureAudioForCall()
-    }
-  }
-
-  override fun onRequestPermissionsResult(
-    requestCode: Int,
-    permissions: Array<String>,
-    grantResults: IntArray
-  ) {
-    super.onRequestPermissionsResult(requestCode, permissions, grantResults)
-    if (requestCode == AUDIO_PERMISSIONS_REQUEST) {
-      val allGranted = grantResults.isNotEmpty() &&
-        grantResults.all { it == PackageManager.PERMISSION_GRANTED }
-      Log.i(TAG, "audio permissions result: allGranted=$allGranted grants=${grantResults.toList()}")
-      if (allGranted) {
-        configureAudioForCall()
-      }
-    }
-  }
-
-  /**
-   * Put the phone into VoIP call mode with handset (earpiece) as the
-   * default output. The Oboe playout stream is opened with
-   * Usage::VoiceCommunication which honours this routing, so:
-   *
-   *   MODE_IN_COMMUNICATION + speakerphoneOn=false  → earpiece (handset)
-   *   MODE_IN_COMMUNICATION + speakerphoneOn=true   → loudspeaker
-   *   MODE_IN_COMMUNICATION + bluetoothScoOn=true   → bluetooth headset
-   *
-   * The speaker/handset/BT toggle itself is wired up via the Tauri
-   * command `set_speakerphone(on)` in a follow-up build. For now the
-   * default is handset, matching the user's stated preference.
-   *
-   * STREAM_VOICE_CALL volume is cranked to max since the in-call volume
-   * slider is separate from media volume on most devices.
-   */
-  private fun configureAudioForCall() {
-    try {
-      val am = getSystemService(Context.AUDIO_SERVICE) as AudioManager
-      Log.i(TAG, "audio state before: mode=${am.mode} speaker=${am.isSpeakerphoneOn} " +
-        "voiceVol=${am.getStreamVolume(AudioManager.STREAM_VOICE_CALL)}/" +
-        "${am.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL)} " +
-        "musicVol=${am.getStreamVolume(AudioManager.STREAM_MUSIC)}/" +
-        "${am.getStreamMaxVolume(AudioManager.STREAM_MUSIC)}")
-
-      am.mode = AudioManager.MODE_IN_COMMUNICATION
-      am.isSpeakerphoneOn = false   // default: handset / earpiece
-
-      // Crank both voice-call and music volumes so nothing silent slips
-      // through regardless of which stream actually ends up driving.
-      val maxVoice = am.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL)
-      am.setStreamVolume(AudioManager.STREAM_VOICE_CALL, maxVoice, 0)
-      val maxMusic = am.getStreamMaxVolume(AudioManager.STREAM_MUSIC)
-      am.setStreamVolume(AudioManager.STREAM_MUSIC, maxMusic, 0)
-
-      Log.i(TAG, "audio state after: mode=${am.mode} speaker=${am.isSpeakerphoneOn} " +
-        "voiceVol=${am.getStreamVolume(AudioManager.STREAM_VOICE_CALL)}/$maxVoice " +
-        "musicVol=${am.getStreamVolume(AudioManager.STREAM_MUSIC)}/$maxMusic")
-    } catch (e: Throwable) {
-      Log.e(TAG, "configureAudioForCall failed: ${e.message}", e)
-    }
-  }
-}

desktop/src-tauri/gen/schemas/capabilities.json

@@ -1 +0,0 @@
-{"default":{"identifier":"default","description":"Default capability — grants core APIs (events, path, window, app, clipboard) to the main window on every platform we ship to.","local":true,"windows":["main"],"permissions":["core:default","core:event:default","core:event:allow-listen","core:event:allow-unlisten","core:event:allow-emit","core:event:allow-emit-to","core:path:default","core:window:default","core:app:default","core:webview:default","shell:default"],"platforms":["linux","macOS","windows","android","iOS"]}}

desktop/src-tauri/src/android_audio.rs

@@ -1,98 +0,0 @@
-//! Runtime bridge to Android's `AudioManager` for in-call audio routing.
-//!
-//! We own a quinn+Oboe VoIP pipeline entirely from Rust, but routing the
-//! playout stream between earpiece / loudspeaker / Bluetooth headset has to
-//! happen at the JVM level because those toggles are AudioManager-only.
-//! This module uses the global JavaVM handle that `ndk_context` exposes
-//! (populated by Tauri's mobile runtime) + the `jni` crate to reach into
-//! the Android framework without needing a Tauri plugin.
-//!
-//! All callers must be inside an Android target (`#[cfg(target_os = "android")]`).
-
-#![cfg(target_os = "android")]
-
-use jni::objects::{JObject, JString, JValue};
-use jni::JavaVM;
-
-/// Grab the JavaVM + current Activity from the ndk_context that Tauri's
-/// mobile runtime sets up at process startup.
-fn jvm_and_activity() -> Result<(JavaVM, JObject<'static>), String> {
-    let ctx = ndk_context::android_context();
-    let vm_ptr = ctx.vm() as *mut jni::sys::JavaVM;
-    if vm_ptr.is_null() {
-        return Err("ndk_context: JavaVM pointer is null".into());
-    }
-    let vm = unsafe { JavaVM::from_raw(vm_ptr) }
-        .map_err(|e| format!("JavaVM::from_raw: {e}"))?;
-    let activity_ptr = ctx.context() as jni::sys::jobject;
-    if activity_ptr.is_null() {
-        return Err("ndk_context: activity pointer is null".into());
-    }
-    // SAFETY: ndk_context guarantees the pointer lives for the process
-    // lifetime; we wrap it as a JObject<'static> for convenience.
-    let activity: JObject<'static> = unsafe { JObject::from_raw(activity_ptr) };
-    Ok((vm, activity))
-}
-
-/// Get Android's `AudioManager` via `activity.getSystemService("audio")`.
-fn audio_manager<'local>(
-    env: &mut jni::AttachGuard<'local>,
-    activity: &JObject<'local>,
-) -> Result<JObject<'local>, String> {
-    let svc_name: JString<'local> = env
-        .new_string("audio")
-        .map_err(|e| format!("new_string(audio): {e}"))?;
-    let am = env
-        .call_method(
-            activity,
-            "getSystemService",
-            "(Ljava/lang/String;)Ljava/lang/Object;",
-            &[JValue::Object(&svc_name)],
-        )
-        .and_then(|v| v.l())
-        .map_err(|e| format!("getSystemService(audio): {e}"))?;
-    if am.is_null() {
-        return Err("getSystemService returned null".into());
-    }
-    Ok(am)
-}
-
-/// Switch between loud speaker (`true`) and earpiece/handset (`false`).
-///
-/// Calls `AudioManager.setSpeakerphoneOn(on)` on the JVM. Requires that
-/// the audio mode is already `MODE_IN_COMMUNICATION` — MainActivity.kt
-/// sets this at startup, so by the time a call is up this is always true.
-pub fn set_speakerphone(on: bool) -> Result<(), String> {
-    let (vm, activity) = jvm_and_activity()?;
-    let mut env = vm
-        .attach_current_thread()
-        .map_err(|e| format!("attach_current_thread: {e}"))?;
-    let am = audio_manager(&mut env, &activity)?;
-
-    env.call_method(
-        &am,
-        "setSpeakerphoneOn",
-        "(Z)V",
-        &[JValue::Bool(if on { 1 } else { 0 })],
-    )
-    .map_err(|e| format!("setSpeakerphoneOn({on}): {e}"))?;
-
-    tracing::info!(on, "AudioManager.setSpeakerphoneOn");
-    Ok(())
-}
-
-/// Query the current speakerphone state. Returns true if routing is on the
-/// loud speaker, false if on earpiece / BT headset / wired headset.
-pub fn is_speakerphone_on() -> Result<bool, String> {
-    let (vm, activity) = jvm_and_activity()?;
-    let mut env = vm
-        .attach_current_thread()
-        .map_err(|e| format!("attach_current_thread: {e}"))?;
-    let am = audio_manager(&mut env, &activity)?;
-
-    let on = env
-        .call_method(&am, "isSpeakerphoneOn", "()Z", &[])
-        .and_then(|v| v.z())
-        .map_err(|e| format!("isSpeakerphoneOn: {e}"))?;
-    Ok(on)
-}

desktop/src-tauri/src/history.rs

@@ -1,180 +0,0 @@
-//! Call history store.
-//!
-//! Keeps a rolling JSON file of the last N direct-call events so the UI can
-//! show "recent contacts" + "call history with callback buttons" on the
-//! direct-call screen. Storage lives in `<APP_DATA_DIR>/call_history.json`
-//! alongside the identity file. The file is read lazily on first access and
-//! cached in an RwLock behind a OnceLock.
-//!
-//! This is a v1 — no duration tracking yet, entries are logged at the
-//! moment the direction is decided (placed / received / missed).
-
-use std::path::PathBuf;
-use std::sync::{OnceLock, RwLock};
-use std::time::{SystemTime, UNIX_EPOCH};
-
-use serde::{Deserialize, Serialize};
-
-/// Maximum number of history entries we keep. Older ones are pruned FIFO.
-const MAX_ENTRIES: usize = 200;
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "lowercase")]
-pub enum CallDirection {
-    /// Local user placed the call.
-    Placed,
-    /// Remote user called and local user answered.
-    Received,
-    /// Remote user called but local user did not answer (rejected or
-    /// missed entirely — the UI treats these identically).
-    Missed,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct CallHistoryEntry {
-    pub call_id: String,
-    pub peer_fp: String,
-    pub peer_alias: Option<String>,
-    pub direction: CallDirection,
-    /// Seconds since UNIX epoch, UTC.
-    pub timestamp_unix: u64,
-}
-
-// ─── In-process store (loaded from disk once) ─────────────────────────────
-
-static STORE: OnceLock<RwLock<Vec<CallHistoryEntry>>> = OnceLock::new();
-
-fn store() -> &'static RwLock<Vec<CallHistoryEntry>> {
-    STORE.get_or_init(|| RwLock::new(load_from_disk()))
-}
-
-fn history_path() -> PathBuf {
-    crate::APP_DATA_DIR
-        .get()
-        .cloned()
-        .unwrap_or_else(|| {
-            let home = std::env::var("HOME").unwrap_or_else(|_| ".".into());
-            PathBuf::from(home).join(".wzp")
-        })
-        .join("call_history.json")
-}
-
-fn load_from_disk() -> Vec<CallHistoryEntry> {
-    let path = history_path();
-    let Ok(bytes) = std::fs::read(&path) else {
-        return Vec::new();
-    };
-    serde_json::from_slice::<Vec<CallHistoryEntry>>(&bytes)
-        .inspect_err(|e| tracing::warn!(path = %path.display(), error = %e, "call_history.json parse failed"))
-        .unwrap_or_default()
-}
-
-fn save_to_disk(entries: &[CallHistoryEntry]) {
-    let path = history_path();
-    if let Some(parent) = path.parent() {
-        let _ = std::fs::create_dir_all(parent);
-    }
-    let Ok(json) = serde_json::to_vec_pretty(entries) else { return };
-    // Atomic write via temp file + rename so a crash mid-write doesn't
-    // leave us with a half-file on disk.
-    let tmp = path.with_extension("json.tmp");
-    if std::fs::write(&tmp, &json).is_ok() {
-        let _ = std::fs::rename(&tmp, &path);
-    }
-}
-
-fn now_unix() -> u64 {
-    SystemTime::now()
-        .duration_since(UNIX_EPOCH)
-        .map(|d| d.as_secs())
-        .unwrap_or(0)
-}
-
-// ─── Public API ───────────────────────────────────────────────────────────
-
-/// Append a new entry to the store and persist to disk. Trims the store to
-/// `MAX_ENTRIES` after insertion.
-pub fn log(
-    call_id: String,
-    peer_fp: String,
-    peer_alias: Option<String>,
-    direction: CallDirection,
-) {
-    tracing::info!(
-        %call_id, %peer_fp, ?direction,
-        alias = ?peer_alias,
-        "history::log"
-    );
-    let entry = CallHistoryEntry {
-        call_id: call_id.clone(),
-        peer_fp,
-        peer_alias,
-        direction,
-        timestamp_unix: now_unix(),
-    };
-    let mut guard = store().write().unwrap();
-    // If an entry for this call_id already exists, update it in-place
-    // rather than appending a duplicate. Protects against the caller
-    // side adding a second Missed row when the callee's DirectCallOffer
-    // bounces back through federation / loopback, or when some future
-    // relay routing edge case double-emits a signal. The dedup keeps
-    // history tidy and matches what the user intuitively expects (one
-    // history row per call, not one per signal event).
-    if let Some(existing) = guard.iter_mut().rev().find(|e| e.call_id == call_id) {
-        tracing::info!(%call_id, from = ?existing.direction, to = ?direction, "history::log replacing existing entry");
-        existing.direction = direction;
-        existing.timestamp_unix = entry.timestamp_unix;
-        save_to_disk(&guard);
-        return;
-    }
-    guard.push(entry);
-    if guard.len() > MAX_ENTRIES {
-        let drop_n = guard.len() - MAX_ENTRIES;
-        guard.drain(0..drop_n);
-    }
-    save_to_disk(&guard);
-}
-
-/// Return a copy of all entries in reverse-chronological order
-/// (most recent first).
-pub fn all() -> Vec<CallHistoryEntry> {
-    let guard = store().read().unwrap();
-    guard.iter().rev().cloned().collect()
-}
-
-/// Unique peer contacts sorted by most recent interaction. Each contact
-/// is represented by the newest history entry for that fingerprint.
-pub fn contacts() -> Vec<CallHistoryEntry> {
-    let guard = store().read().unwrap();
-    let mut seen: std::collections::HashSet<String> = std::collections::HashSet::new();
-    let mut out = Vec::new();
-    // iterate newest → oldest
-    for entry in guard.iter().rev() {
-        if seen.insert(entry.peer_fp.clone()) {
-            out.push(entry.clone());
-        }
-    }
-    out
-}
-
-/// Clear the entire history and persist the empty file.
-pub fn clear() {
-    let mut guard = store().write().unwrap();
-    guard.clear();
-    save_to_disk(&guard);
-}
-
-/// Find a Missed-candidate entry that matches `call_id` and hasn't been
-/// answered yet. Used by the signal loop to turn "pending incoming" into
-/// "Received" when the user accepts.
-pub fn mark_received_if_pending(call_id: &str) -> bool {
-    let mut guard = store().write().unwrap();
-    for entry in guard.iter_mut().rev() {
-        if entry.call_id == call_id && entry.direction == CallDirection::Missed {
-            entry.direction = CallDirection::Received;
-            save_to_disk(&guard);
-            return true;
-        }
-    }
-    false
-}

desktop/src-tauri/src/lib.rs

@@ -1,717 +0,0 @@
-// WarzonePhone Tauri backend — shared between desktop (macOS/Windows/Linux)
-// and Tauri mobile (Android/iOS). Platform-specific audio is cfg-gated.
-
-#![cfg_attr(
-    all(not(debug_assertions), target_os = "windows"),
-    windows_subsystem = "windows"
-)]
-
-// Call engine — now compiled on every platform. On desktop it runs the real
-// CPAL/VPIO audio pipeline; on Android the engine calls into the standalone
-// wzp-native cdylib (via the wzp_native module) for Oboe-backed audio.
-mod engine;
-
-// Android runtime binding to libwzp_native.so (Oboe audio backend, built as
-// a standalone cdylib with cargo-ndk to avoid the Tauri staticlib symbol
-// leak — see docs/incident-tauri-android-init-tcb.md).
-#[cfg(target_os = "android")]
-mod wzp_native;
-
-// Android AudioManager bridge (routing earpiece / speaker / BT).
-#[cfg(target_os = "android")]
-mod android_audio;
-
-// Direct-call history store (persisted JSON in app data dir).
-mod history;
-
-// CallEngine has a unified impl on both targets now — the Android branch of
-// CallEngine::start() routes audio through the standalone wzp-native cdylib
-// (loaded via the wzp_native module below), the desktop branch uses CPAL.
-use engine::CallEngine;
-
-use serde::Serialize;
-use std::path::PathBuf;
-use std::sync::{Arc, OnceLock};
-use tauri::{Emitter, Manager};
-use tokio::sync::Mutex;
-use wzp_proto::MediaTransport;
-
-/// Short git hash captured at compile time by build.rs.
-const GIT_HASH: &str = env!("WZP_GIT_HASH");
-
-/// Resolved by `setup()` once we have a Tauri AppHandle. Holds the
-/// platform-correct app data dir (e.g. `/data/data/com.wzp.desktop/files` on
-/// Android, `~/Library/Application Support/com.wzp.desktop` on macOS).
-static APP_DATA_DIR: OnceLock<PathBuf> = OnceLock::new();
-
-/// Adjective list — keep in sync with the noun list below. Both are powers of
-/// 2 friendly so the modulo bias is negligible.
-const ALIAS_ADJECTIVES: &[&str] = &[
-    "Swift", "Silent", "Brave", "Calm", "Dark", "Fierce", "Ghost",
-    "Iron", "Lucky", "Noble", "Quick", "Sharp", "Storm", "Wild",
-    "Cold", "Bright", "Lone", "Red", "Grey", "Frosty", "Dusty",
-    "Rusty", "Neon", "Void", "Solar", "Lunar", "Cyber", "Pixel",
-    "Sonic", "Hyper", "Turbo", "Nano", "Mega", "Ultra", "Zinc",
-];
-const ALIAS_NOUNS: &[&str] = &[
-    "Wolf", "Hawk", "Fox", "Bear", "Lynx", "Crow", "Viper",
-    "Cobra", "Tiger", "Eagle", "Shark", "Raven", "Falcon", "Otter",
-    "Mantis", "Panda", "Jackal", "Badger", "Heron", "Bison",
-    "Condor", "Coyote", "Gecko", "Hornet", "Marten", "Osprey",
-    "Parrot", "Puma", "Raptor", "Stork", "Toucan", "Walrus",
-];
-
-/// Derive a stable human-readable alias from the seed bytes. Same seed →
-/// same alias forever, different seeds → effectively random aliases.
-fn derive_alias(seed: &wzp_crypto::Seed) -> String {
-    let adj_idx = (u16::from_le_bytes([seed.0[0], seed.0[1]]) as usize) % ALIAS_ADJECTIVES.len();
-    let noun_idx = (u16::from_le_bytes([seed.0[2], seed.0[3]]) as usize) % ALIAS_NOUNS.len();
-    format!("{} {}", ALIAS_ADJECTIVES[adj_idx], ALIAS_NOUNS[noun_idx])
-}
-
-#[derive(Clone, Serialize)]
-struct CallEvent {
-    kind: String,
-    message: String,
-}
-
-#[derive(Clone, Serialize)]
-struct Participant {
-    fingerprint: String,
-    alias: Option<String>,
-    relay_label: Option<String>,
-}
-
-#[derive(Clone, Serialize)]
-struct CallStatus {
-    active: bool,
-    mic_muted: bool,
-    spk_muted: bool,
-    participants: Vec<Participant>,
-    encode_fps: u64,
-    recv_fps: u64,
-    audio_level: u32,
-    call_duration_secs: f64,
-    fingerprint: String,
-    tx_codec: String,
-    rx_codec: String,
-}
-
-struct AppState {
-    engine: Mutex<Option<CallEngine>>,
-    signal: Arc<Mutex<SignalState>>,
-}
-
-/// Ping result with RTT and server identity hash.
-#[derive(Clone, Serialize)]
-struct PingResult {
-    rtt_ms: u32,
-    /// Server identity: SHA-256 of the QUIC peer certificate, hex-encoded.
-    server_fingerprint: String,
-}
-
-/// Toggle DRED verbose logging at runtime (gates the chatty per-frame
-/// reconstruction + parse logs in opus_enc and engine.rs). Wired to the
-/// "DRED debug logs" checkbox in the GUI settings panel.
-#[tauri::command]
-fn set_dred_verbose_logs(enabled: bool) {
-    wzp_codec::set_dred_verbose_logs(enabled);
-    tracing::info!(enabled, "DRED verbose logs toggled");
-}
-
-/// Read the current DRED verbose logging flag (so the GUI can hydrate
-/// its checkbox on startup without trusting localStorage alone).
-#[tauri::command]
-fn get_dred_verbose_logs() -> bool {
-    wzp_codec::dred_verbose_logs()
-}
-
-/// Ping a relay to check if it's online, measure RTT, and get server identity.
-#[tauri::command]
-async fn ping_relay(relay: String) -> Result<PingResult, String> {
-    let addr: std::net::SocketAddr = relay.parse().map_err(|e| format!("bad address: {e}"))?;
-    let _ = rustls::crypto::ring::default_provider().install_default();
-    let bind: std::net::SocketAddr = "0.0.0.0:0".parse().unwrap();
-    let endpoint = wzp_transport::create_endpoint(bind, None).map_err(|e| format!("{e}"))?;
-    let client_cfg = wzp_transport::client_config();
-
-    let start = std::time::Instant::now();
-    let conn_result = tokio::time::timeout(
-        std::time::Duration::from_secs(3),
-        wzp_transport::connect(&endpoint, addr, "ping", client_cfg),
-    )
-    .await;
-
-    // Always close endpoint to prevent resource leaks
-    endpoint.close(0u32.into(), b"done");
-
-    match conn_result {
-        Ok(Ok(conn)) => {
-            let rtt_ms = start.elapsed().as_millis() as u32;
-
-            let server_fingerprint = conn
-                .peer_identity()
-                .and_then(|id| id.downcast::<Vec<rustls::pki_types::CertificateDer>>().ok())
-                .and_then(|certs| certs.first().map(|c| {
-                    use std::hash::{Hash, Hasher};
-                    let mut hasher = std::collections::hash_map::DefaultHasher::new();
-                    c.as_ref().hash(&mut hasher);
-                    let h = hasher.finish();
-                    format!("{h:016x}")
-                }))
-                .unwrap_or_else(|| {
-                    format!("{:x}", addr.ip().to_string().len() as u64 * 0x9e3779b97f4a7c15 + addr.port() as u64)
-                });
-
-            conn.close(0u32.into(), b"ping");
-            Ok(PingResult { rtt_ms, server_fingerprint })
-        }
-        Ok(Err(e)) => Err(format!("{e}")),
-        Err(_) => Err("timeout (3s)".into()),
-    }
-}
-
-/// Return the directory where identity/config should live.
-///
-/// Resolved at startup from Tauri's `path().app_data_dir()` API which gives
-/// us the platform-correct app-private location:
-///   - Android: `/data/data/<package_id>/files/com.wzp.desktop`
-///   - macOS:   `~/Library/Application Support/com.wzp.desktop`
-///   - Linux:   `~/.local/share/com.wzp.desktop`
-///
-/// Falls back to `$HOME/.wzp` on the desktop side if the OnceLock hasn't been
-/// initialised yet (shouldn't happen in normal startup, but keeps the fn
-/// total).
-fn identity_dir() -> PathBuf {
-    if let Some(dir) = APP_DATA_DIR.get() {
-        return dir.clone();
-    }
-    #[cfg(target_os = "android")]
-    {
-        // Last-resort default. The real path is set in setup() below.
-        std::path::PathBuf::from("/data/data/com.wzp.desktop/files")
-    }
-    #[cfg(not(target_os = "android"))]
-    {
-        let home = std::env::var("HOME").unwrap_or_else(|_| ".".into());
-        std::path::PathBuf::from(home).join(".wzp")
-    }
-}
-
-fn identity_path() -> std::path::PathBuf {
-    identity_dir().join("identity")
-}
-
-/// Load the persisted seed, or generate-and-persist a new one if missing.
-fn load_or_create_seed() -> Result<wzp_crypto::Seed, String> {
-    let path = identity_path();
-    if path.exists() {
-        let hex = std::fs::read_to_string(&path).map_err(|e| format!("read identity: {e}"))?;
-        return wzp_crypto::Seed::from_hex(hex.trim()).map_err(|e| format!("{e}"));
-    }
-    let seed = wzp_crypto::Seed::generate();
-    if let Some(parent) = path.parent() {
-        std::fs::create_dir_all(parent).map_err(|e| format!("create identity dir: {e}"))?;
-    }
-    let hex: String = seed.0.iter().map(|b| format!("{b:02x}")).collect();
-    std::fs::write(&path, hex).map_err(|e| format!("write identity: {e}"))?;
-    Ok(seed)
-}
-
-/// Read fingerprint, generating a fresh identity if none exists yet.
-#[tauri::command]
-fn get_identity() -> Result<String, String> {
-    let seed = load_or_create_seed()?;
-    Ok(seed.derive_identity().public_identity().fingerprint.to_string())
-}
-
-/// Build/identity info shown on the home screen so the user can prove which
-/// build is installed and what their stable alias is.
-#[derive(Clone, Serialize)]
-struct AppInfo {
-    /// Short git commit hash captured at build time.
-    git_hash: &'static str,
-    /// Stable adjective+noun derived from the seed.
-    alias: String,
-    /// Full fingerprint, e.g. "abcd:ef01:..."
-    fingerprint: String,
-    /// App data dir actually in use — useful for debugging EACCES issues.
-    data_dir: String,
-}
-
-#[tauri::command]
-fn get_app_info() -> Result<AppInfo, String> {
-    let seed = load_or_create_seed()?;
-    let pub_id = seed.derive_identity().public_identity();
-    Ok(AppInfo {
-        git_hash: GIT_HASH,
-        alias: derive_alias(&seed),
-        fingerprint: pub_id.fingerprint.to_string(),
-        data_dir: identity_dir().to_string_lossy().into_owned(),
-    })
-}
-
-#[tauri::command]
-async fn connect(
-    state: tauri::State<'_, Arc<AppState>>,
-    app: tauri::AppHandle,
-    relay: String,
-    room: String,
-    alias: String,
-    os_aec: bool,
-    quality: String,
-) -> Result<String, String> {
-    let mut engine_lock = state.engine.lock().await;
-    if engine_lock.is_some() {
-        return Err("already connected".into());
-    }
-
-    // If we previously opened a quinn::Endpoint for the signaling connection
-    // (direct-call path), reuse it so the media connection shares the same
-    // UDP socket. This side-steps the Android issue where a second
-    // quinn::Endpoint silently hangs in the QUIC handshake.
-    let reuse_endpoint = state.signal.lock().await.endpoint.clone();
-    if reuse_endpoint.is_some() {
-        tracing::info!("connect: reusing existing signal endpoint for media connection");
-    }
-
-    let app_clone = app.clone();
-    match CallEngine::start(relay, room, alias, os_aec, quality, reuse_endpoint, move |event_kind, message| {
-        let _ = app_clone.emit(
-            "call-event",
-            CallEvent {
-                kind: event_kind.to_string(),
-                message: message.to_string(),
-            },
-        );
-    })
-    .await
-    {
-        Ok(eng) => {
-            *engine_lock = Some(eng);
-            Ok("connected".into())
-        }
-        Err(e) => Err(format!("{e}")),
-    }
-}
-
-#[tauri::command]
-async fn disconnect(state: tauri::State<'_, Arc<AppState>>) -> Result<String, String> {
-    let mut engine_lock = state.engine.lock().await;
-    if let Some(engine) = engine_lock.take() {
-        engine.stop().await;
-        Ok("disconnected".into())
-    } else {
-        Err("not connected".into())
-    }
-}
-
-#[tauri::command]
-async fn toggle_mic(state: tauri::State<'_, Arc<AppState>>) -> Result<bool, String> {
-    let engine_lock = state.engine.lock().await;
-    if let Some(ref engine) = *engine_lock {
-        Ok(engine.toggle_mic())
-    } else {
-        Err("not connected".into())
-    }
-}
-
-#[tauri::command]
-async fn toggle_speaker(state: tauri::State<'_, Arc<AppState>>) -> Result<bool, String> {
-    let engine_lock = state.engine.lock().await;
-    if let Some(ref engine) = *engine_lock {
-        Ok(engine.toggle_speaker())
-    } else {
-        Err("not connected".into())
-    }
-}
-
-#[tauri::command]
-async fn get_status(state: tauri::State<'_, Arc<AppState>>) -> Result<CallStatus, String> {
-    let engine_lock = state.engine.lock().await;
-    if let Some(ref engine) = *engine_lock {
-        let status = engine.status().await;
-        Ok(CallStatus {
-            active: true,
-            mic_muted: status.mic_muted,
-            spk_muted: status.spk_muted,
-            participants: status
-                .participants
-                .into_iter()
-                .map(|p| Participant {
-                    fingerprint: p.fingerprint,
-                    alias: p.alias,
-                    relay_label: p.relay_label,
-                })
-                .collect(),
-            encode_fps: status.frames_sent,
-            recv_fps: status.frames_received,
-            audio_level: status.audio_level,
-            call_duration_secs: status.call_duration_secs,
-            fingerprint: status.fingerprint,
-            tx_codec: status.tx_codec,
-            rx_codec: status.rx_codec,
-        })
-    } else {
-        Ok(CallStatus {
-            active: false,
-            mic_muted: false,
-            spk_muted: false,
-            participants: vec![],
-            encode_fps: 0,
-            recv_fps: 0,
-            audio_level: 0,
-            call_duration_secs: 0.0,
-            fingerprint: String::new(),
-            tx_codec: String::new(),
-            rx_codec: String::new(),
-        })
-    }
-}
-
-// ─── Audio routing (Android-specific, no-op on desktop) ─────────────────────
-
-/// Switch the call audio between earpiece (`on=false`) and loudspeaker
-/// (`on=true`). On Android this calls AudioManager.setSpeakerphoneOn via
-/// JNI AND then stops and restarts the Oboe streams so AAudio reconfigures
-/// with the new routing — without the restart, changing the speakerphone
-/// state mid-call silently tears down the running AAudio streams on some
-/// OEMs and both capture + playout stop producing data.
-///
-/// The Rust send/recv tokio tasks keep running during the ~60ms restart
-/// window; they just observe empty reads / writes against the
-/// process-global ring buffers, which is fine because the ring state
-/// is preserved across stop+start.
-#[tauri::command]
-#[allow(unused_variables)]
-async fn set_speakerphone(on: bool) -> Result<(), String> {
-    #[cfg(target_os = "android")]
-    {
-        android_audio::set_speakerphone(on)?;
-        if wzp_native::is_loaded() && wzp_native::audio_is_running() {
-            tracing::info!(on, "set_speakerphone: restarting Oboe for route change");
-            // Oboe's stop/start are sync C-FFI calls that block for ~400ms
-            // on Nothing-class devices (Pixel is faster). Calling them
-            // directly from an async Tauri command stalls the tokio
-            // executor — the send/recv engine tasks were observed to
-            // freeze for ~20 seconds across a few rapid speaker toggles,
-            // piling up buffered QUIC datagrams and then flooding them
-            // all at once when the runtime finally caught up.
-            //
-            // Fix: run the audio teardown + reopen on a dedicated
-            // blocking thread so the runtime keeps scheduling everything
-            // else. AAudio's requestStop returns only after the stream
-            // is actually in Stopped state, so no explicit inter-call
-            // sleep is needed.
-            tokio::task::spawn_blocking(|| {
-                wzp_native::audio_stop();
-                wzp_native::audio_start()
-                    .map_err(|code| format!("audio_start after speakerphone toggle: code {code}"))
-            })
-            .await
-            .map_err(|e| format!("spawn_blocking join: {e}"))??;
-            tracing::info!("set_speakerphone: Oboe restarted");
-        }
-        Ok(())
-    }
-    #[cfg(not(target_os = "android"))]
-    {
-        Ok(())
-    }
-}
-
-/// Query whether the call is currently routed to the loudspeaker.
-#[tauri::command]
-async fn is_speakerphone_on() -> Result<bool, String> {
-    #[cfg(target_os = "android")]
-    {
-        android_audio::is_speakerphone_on()
-    }
-    #[cfg(not(target_os = "android"))]
-    {
-        Ok(false)
-    }
-}
-
-// ─── Call history commands ───────────────────────────────────────────────────
-
-#[tauri::command]
-fn get_call_history() -> Vec<history::CallHistoryEntry> {
-    history::all()
-}
-
-#[tauri::command]
-fn get_recent_contacts() -> Vec<history::CallHistoryEntry> {
-    history::contacts()
-}
-
-#[tauri::command]
-fn clear_call_history() -> Result<(), String> {
-    history::clear();
-    Ok(())
-}
-
-// ─── Signaling commands — platform independent ───────────────────────────────
-
-struct SignalState {
-    transport: Option<Arc<wzp_transport::QuinnTransport>>,
-    /// The quinn::Endpoint backing the signal connection. Reused for the
-    /// media connection when a direct call is accepted — Android phones
-    /// silently drop packets from a second quinn::Endpoint to the same
-    /// relay, so every call after register_signal MUST share this socket.
-    endpoint: Option<wzp_transport::Endpoint>,
-    fingerprint: String,
-    signal_status: String,
-    incoming_call_id: Option<String>,
-    incoming_caller_fp: Option<String>,
-    incoming_caller_alias: Option<String>,
-}
-
-#[tauri::command]
-async fn register_signal(
-    state: tauri::State<'_, Arc<AppState>>,
-    app: tauri::AppHandle,
-    relay: String,
-) -> Result<String, String> {
-    use wzp_proto::SignalMessage;
-
-    let addr: std::net::SocketAddr = relay.parse().map_err(|e| format!("bad address: {e}"))?;
-    let _ = rustls::crypto::ring::default_provider().install_default();
-
-    // Load or create seed automatically — no need to "connect to a room first"
-    let seed = load_or_create_seed()?;
-    let pub_id = seed.derive_identity().public_identity();
-    let fp = pub_id.fingerprint.to_string();
-    let identity_pub = *pub_id.signing.as_bytes();
-
-    let bind: std::net::SocketAddr = "0.0.0.0:0".parse().unwrap();
-    let endpoint = wzp_transport::create_endpoint(bind, None).map_err(|e| format!("{e}"))?;
-    let conn = wzp_transport::connect(&endpoint, addr, "_signal", wzp_transport::client_config())
-        .await.map_err(|e| format!("{e}"))?;
-    let transport = Arc::new(wzp_transport::QuinnTransport::new(conn));
-
-    transport.send_signal(&SignalMessage::RegisterPresence {
-        identity_pub, signature: vec![], alias: None,
-    }).await.map_err(|e| format!("{e}"))?;
-
-    match transport.recv_signal().await.map_err(|e| format!("{e}"))? {
-        Some(SignalMessage::RegisterPresenceAck { success: true, .. }) => {}
-        _ => return Err("registration failed".into()),
-    }
-
-    { let mut sig = state.signal.lock().await; sig.transport = Some(transport.clone()); sig.endpoint = Some(endpoint.clone()); sig.fingerprint = fp.clone(); sig.signal_status = "registered".into(); }
-
-    tracing::info!(%fp, "signal registered, spawning recv loop");
-    let signal_state = Arc::clone(&state.signal);
-    let app_clone = app.clone();
-    tokio::spawn(async move {
-        loop {
-            match transport.recv_signal().await {
-                Ok(Some(SignalMessage::CallRinging { call_id })) => {
-                    tracing::info!(%call_id, "signal: CallRinging");
-                    let mut sig = signal_state.lock().await; sig.signal_status = "ringing".into();
-                    let _ = app_clone.emit("signal-event", serde_json::json!({"type":"ringing","call_id":call_id}));
-                }
-                Ok(Some(SignalMessage::DirectCallOffer { caller_fingerprint, caller_alias, call_id, .. })) => {
-                    tracing::info!(%call_id, caller = %caller_fingerprint, "signal: DirectCallOffer");
-                    let mut sig = signal_state.lock().await; sig.signal_status = "incoming".into();
-                    sig.incoming_call_id = Some(call_id.clone()); sig.incoming_caller_fp = Some(caller_fingerprint.clone()); sig.incoming_caller_alias = caller_alias.clone();
-                    // Log as a Missed entry up-front. If the user accepts
-                    // the call, answer_call upgrades it to Received via
-                    // history::mark_received_if_pending(call_id). If they
-                    // reject or ignore, it stays Missed.
-                    history::log(
-                        call_id.clone(),
-                        caller_fingerprint.clone(),
-                        caller_alias.clone(),
-                        history::CallDirection::Missed,
-                    );
-                    let _ = app_clone.emit("signal-event", serde_json::json!({"type":"incoming","call_id":call_id,"caller_fp":caller_fingerprint,"caller_alias":caller_alias}));
-                    let _ = app_clone.emit("history-changed", ());
-                }
-                Ok(Some(SignalMessage::DirectCallAnswer { call_id, accept_mode, .. })) => {
-                    tracing::info!(%call_id, ?accept_mode, "signal: DirectCallAnswer (forwarded by relay)");
-                }
-                Ok(Some(SignalMessage::CallSetup { call_id, room, relay_addr })) => {
-                    tracing::info!(%call_id, %room, %relay_addr, "signal: CallSetup — emitting setup event to JS");
-                    let mut sig = signal_state.lock().await; sig.signal_status = "setup".into();
-                    let _ = app_clone.emit("signal-event", serde_json::json!({"type":"setup","call_id":call_id,"room":room,"relay_addr":relay_addr}));
-                }
-                Ok(Some(SignalMessage::Hangup { reason })) => {
-                    tracing::info!(?reason, "signal: Hangup");
-                    let mut sig = signal_state.lock().await; sig.signal_status = "registered".into(); sig.incoming_call_id = None;
-                    let _ = app_clone.emit("signal-event", serde_json::json!({"type":"hangup"}));
-                }
-                Ok(Some(other)) => {
-                    tracing::debug!(?other, "signal: unhandled message");
-                }
-                Ok(None) => {
-                    tracing::warn!("signal recv returned None — peer closed");
-                    break;
-                }
-                Err(e) => {
-                    tracing::warn!(error = %e, "signal recv error — breaking loop");
-                    break;
-                }
-            }
-        }
-        tracing::warn!("signal recv loop exited — signal_status=idle, transport dropped");
-        let mut sig = signal_state.lock().await; sig.signal_status = "idle".into(); sig.transport = None;
-    });
-    Ok(fp)
-}
-
-#[tauri::command]
-async fn place_call(
-    state: tauri::State<'_, Arc<AppState>>,
-    app: tauri::AppHandle,
-    target_fp: String,
-) -> Result<(), String> {
-    use wzp_proto::SignalMessage;
-    let sig = state.signal.lock().await;
-    let transport = sig.transport.as_ref().ok_or("not registered")?;
-    let call_id = format!("{:016x}", std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_nanos());
-    tracing::info!(%call_id, %target_fp, "place_call: sending DirectCallOffer");
-    transport.send_signal(&SignalMessage::DirectCallOffer {
-        caller_fingerprint: sig.fingerprint.clone(), caller_alias: None, target_fingerprint: target_fp.clone(),
-        call_id: call_id.clone(), identity_pub: [0u8; 32], ephemeral_pub: [0u8; 32], signature: vec![],
-        supported_profiles: vec![wzp_proto::QualityProfile::GOOD],
-    }).await.map_err(|e| format!("{e}"))?;
-    history::log(call_id, target_fp, None, history::CallDirection::Placed);
-    let _ = app.emit("history-changed", ());
-    Ok(())
-}
-
-#[tauri::command]
-async fn answer_call(
-    state: tauri::State<'_, Arc<AppState>>,
-    app: tauri::AppHandle,
-    call_id: String,
-    mode: i32,
-) -> Result<(), String> {
-    use wzp_proto::SignalMessage;
-    let sig = state.signal.lock().await;
-    let transport = sig.transport.as_ref().ok_or_else(|| {
-        tracing::warn!("answer_call: not registered (no transport)");
-        "not registered".to_string()
-    })?;
-    let accept_mode = match mode { 0 => wzp_proto::CallAcceptMode::Reject, 1 => wzp_proto::CallAcceptMode::AcceptTrusted, _ => wzp_proto::CallAcceptMode::AcceptGeneric };
-    tracing::info!(%call_id, ?accept_mode, "answer_call: sending DirectCallAnswer");
-    transport.send_signal(&SignalMessage::DirectCallAnswer {
-        call_id: call_id.clone(), accept_mode, identity_pub: None, ephemeral_pub: None, signature: None,
-        chosen_profile: Some(wzp_proto::QualityProfile::GOOD),
-    }).await.map_err(|e| {
-        tracing::error!(%call_id, error = %e, "answer_call: send_signal failed");
-        format!("{e}")
-    })?;
-    tracing::info!(%call_id, "answer_call: DirectCallAnswer sent successfully");
-    // Upgrade the pending "Missed" entry to "Received" if the user
-    // accepted (mode != Reject). Mode 0 = Reject → leave as Missed.
-    if mode != 0 {
-        if history::mark_received_if_pending(&call_id) {
-            let _ = app.emit("history-changed", ());
-        }
-    }
-    Ok(())
-}
-
-#[tauri::command]
-async fn get_signal_status(state: tauri::State<'_, Arc<AppState>>) -> Result<serde_json::Value, String> {
-    let sig = state.signal.lock().await;
-    Ok(serde_json::json!({"status":sig.signal_status,"fingerprint":sig.fingerprint,"incoming_call_id":sig.incoming_call_id,"incoming_caller_fp":sig.incoming_caller_fp}))
-}
-
-/// Tear down the signal connection so the user goes back to idle. Called
-/// when the user clicks "Deregister" on the direct-call screen. The
-/// spawned recv loop will break out naturally when the transport closes.
-#[tauri::command]
-async fn deregister(state: tauri::State<'_, Arc<AppState>>) -> Result<(), String> {
-    let mut sig = state.signal.lock().await;
-    if let Some(transport) = sig.transport.take() {
-        tracing::info!("deregister: closing signal transport");
-        transport.close().await.ok();
-    }
-    sig.endpoint = None;
-    sig.signal_status = "idle".into();
-    sig.incoming_call_id = None;
-    sig.incoming_caller_fp = None;
-    sig.incoming_caller_alias = None;
-    Ok(())
-}
-
-// ─── App entry point ─────────────────────────────────────────────────────────
-
-/// Shared Tauri app builder. Used by the desktop `main.rs` and the mobile
-/// entry point below.
-pub fn run() {
-    tracing_subscriber::fmt().init();
-
-    let state = Arc::new(AppState {
-        engine: Mutex::new(None),
-        signal: Arc::new(Mutex::new(SignalState {
-            transport: None, endpoint: None, fingerprint: String::new(), signal_status: "idle".into(),
-            incoming_call_id: None, incoming_caller_fp: None, incoming_caller_alias: None,
-        })),
-    });
-
-    tauri::Builder::default()
-        .plugin(tauri_plugin_shell::init())
-        .manage(state)
-        .setup(|app| {
-            // Resolve the platform-correct app data dir once at startup so
-            // every command can read/write the seed without juggling AppHandle.
-            let data_dir = app
-                .path()
-                .app_data_dir()
-                .map(|p| p.join(".wzp"))
-                .unwrap_or_else(|_| identity_dir());
-            // create_dir_all is a no-op if it already exists.
-            if let Err(e) = std::fs::create_dir_all(&data_dir) {
-                tracing::warn!("failed to create app data dir {data_dir:?}: {e}");
-            }
-            tracing::info!("app data dir: {data_dir:?}");
-            let _ = APP_DATA_DIR.set(data_dir);
-
-            // Load the standalone wzp-native cdylib (Oboe audio bridge) and
-            // cache its exported function pointers. The library handle is
-            // kept alive in a 'static OnceLock for the lifetime of the
-            // process, so CallEngine::start() can invoke its audio FFI
-            // from anywhere. See src/wzp_native.rs and the incident report
-            // in docs/incident-tauri-android-init-tcb.md.
-            #[cfg(target_os = "android")]
-            {
-                match wzp_native::init() {
-                    Ok(()) => {
-                        tracing::info!(
-                            "wzp-native loaded: version={} msg=\"{}\"",
-                            wzp_native::version(),
-                            wzp_native::hello()
-                        );
-                    }
-                    Err(e) => {
-                        tracing::warn!("wzp-native init failed: {e}");
-                    }
-                }
-            }
-
-            Ok(())
-        })
-        .invoke_handler(tauri::generate_handler![
-            ping_relay, get_identity, get_app_info,
-            connect, disconnect, toggle_mic, toggle_speaker, get_status,
-            register_signal, place_call, answer_call, get_signal_status,
-            deregister,
-            set_speakerphone, is_speakerphone_on,
-            get_call_history, get_recent_contacts, clear_call_history,
-            set_dred_verbose_logs, get_dred_verbose_logs,
-        ])
-        .run(tauri::generate_context!())
-        .expect("error while running WarzonePhone");
-}
-
-/// Tauri mobile entry point (Android/iOS). On desktop this is a no-op —
-/// `main.rs` calls `run()` directly.
-#[cfg_attr(mobile, tauri::mobile_entry_point)]
-pub fn mobile_entry() {
-    run();
-}

desktop/src-tauri/src/main.rs

@@ -1,10 +0,0 @@
-// Desktop binary entry point. All logic lives in `lib.rs` so the same
-// code can be built as a cdylib for Android/iOS via `cargo tauri android build`.
-#![cfg_attr(
-    all(not(debug_assertions), target_os = "windows"),
-    windows_subsystem = "windows"
-)]
-
-fn main() {
-    wzp_desktop_lib::run();
-}

desktop/src-tauri/src/wzp_native.rs

@@ -1,138 +0,0 @@
-//! Runtime binding to the standalone `wzp-native` cdylib.
-//!
-//! See `docs/incident-tauri-android-init-tcb.md` and the top of
-//! `crates/wzp-native/src/lib.rs` for the full story on why this split
-//! exists. Short version: Tauri's desktop cdylib cannot have any C++
-//! compiled into it (via cc::Build) without landing in rust-lang/rust#104707's
-//! staticlib symbol leak, which makes bionic's private `pthread_create`
-//! symbols bind locally and SIGSEGV in `__init_tcb+4` at launch. So all
-//! the Oboe + audio code lives in a standalone `wzp-native` .so built
-//! with `cargo-ndk`, and we dlopen it here at runtime.
-//!
-//! The Library handle lives in a `'static` `OnceLock` for the lifetime of
-//! the process; all function pointers cached below borrow from it safely.
-
-#![cfg(target_os = "android")]
-
-use std::sync::OnceLock;
-
-// ─── Library handle (kept alive forever) ─────────────────────────────────
-
-static LIB: OnceLock<libloading::Library> = OnceLock::new();
-
-// Cached function pointers, resolved once at init(). Each is a raw
-// `extern "C"` fn pointer with effectively `'static` lifetime because
-// LIB is a OnceLock that never drops.
-static VERSION: OnceLock<unsafe extern "C" fn() -> i32> = OnceLock::new();
-static HELLO: OnceLock<unsafe extern "C" fn(*mut u8, usize) -> usize> = OnceLock::new();
-static AUDIO_START: OnceLock<unsafe extern "C" fn() -> i32> = OnceLock::new();
-static AUDIO_STOP: OnceLock<unsafe extern "C" fn()> = OnceLock::new();
-static AUDIO_READ_CAPTURE: OnceLock<unsafe extern "C" fn(*mut i16, usize) -> usize> = OnceLock::new();
-static AUDIO_WRITE_PLAYOUT: OnceLock<unsafe extern "C" fn(*const i16, usize) -> usize> = OnceLock::new();
-static AUDIO_IS_RUNNING: OnceLock<unsafe extern "C" fn() -> i32> = OnceLock::new();
-static AUDIO_CAPTURE_LATENCY: OnceLock<unsafe extern "C" fn() -> f32> = OnceLock::new();
-static AUDIO_PLAYOUT_LATENCY: OnceLock<unsafe extern "C" fn() -> f32> = OnceLock::new();
-
-/// Load `libwzp_native.so` and resolve every exported function we use.
-/// Call this once at app startup (from the Tauri `setup()` callback).
-/// Subsequent calls are no-ops.
-pub fn init() -> Result<(), String> {
-    if LIB.get().is_some() {
-        return Ok(());
-    }
-
-    // Open the sibling cdylib. The Android dynamic linker searches
-    // /data/app/<pkg>/lib/arm64/ which gradle populates from jniLibs.
-    let lib = unsafe { libloading::Library::new("libwzp_native.so") }
-        .map_err(|e| format!("dlopen libwzp_native.so: {e}"))?;
-
-    // Stash the Library into the OnceLock first so all Symbol lookups
-    // below borrow from the 'static reference rather than a local.
-    LIB.set(lib).map_err(|_| "wzp_native::LIB already set")?;
-    let lib_ref: &'static libloading::Library = LIB.get().unwrap();
-
-    unsafe {
-        macro_rules! resolve {
-            ($cell:expr, $ty:ty, $name:expr) => {{
-                let sym: libloading::Symbol<$ty> = lib_ref.get($name)
-                    .map_err(|e| format!("dlsym {}: {e}", core::str::from_utf8($name).unwrap_or("?")))?;
-                // Dereference the Symbol to extract the raw fn pointer;
-                // it stays valid because lib_ref is 'static.
-                $cell.set(*sym).map_err(|_| format!("{} already set", core::str::from_utf8($name).unwrap_or("?")))?;
-            }};
-        }
-
-        resolve!(VERSION, unsafe extern "C" fn() -> i32, b"wzp_native_version");
-        resolve!(HELLO, unsafe extern "C" fn(*mut u8, usize) -> usize, b"wzp_native_hello");
-        resolve!(AUDIO_START, unsafe extern "C" fn() -> i32, b"wzp_native_audio_start");
-        resolve!(AUDIO_STOP, unsafe extern "C" fn(), b"wzp_native_audio_stop");
-        resolve!(AUDIO_READ_CAPTURE, unsafe extern "C" fn(*mut i16, usize) -> usize, b"wzp_native_audio_read_capture");
-        resolve!(AUDIO_WRITE_PLAYOUT, unsafe extern "C" fn(*const i16, usize) -> usize, b"wzp_native_audio_write_playout");
-        resolve!(AUDIO_IS_RUNNING, unsafe extern "C" fn() -> i32, b"wzp_native_audio_is_running");
-        resolve!(AUDIO_CAPTURE_LATENCY, unsafe extern "C" fn() -> f32, b"wzp_native_audio_capture_latency_ms");
-        resolve!(AUDIO_PLAYOUT_LATENCY, unsafe extern "C" fn() -> f32, b"wzp_native_audio_playout_latency_ms");
-    }
-
-    Ok(())
-}
-
-/// Is `init()` done and all symbols cached?
-pub fn is_loaded() -> bool {
-    AUDIO_START.get().is_some()
-}
-
-// ─── Smoke-test accessors ────────────────────────────────────────────────
-
-pub fn version() -> i32 {
-    VERSION.get().map(|f| unsafe { f() }).unwrap_or(-1)
-}
-
-pub fn hello() -> String {
-    let Some(f) = HELLO.get() else { return String::new(); };
-    let mut buf = [0u8; 64];
-    let n = unsafe { f(buf.as_mut_ptr(), buf.len()) };
-    String::from_utf8_lossy(&buf[..n]).into_owned()
-}
-
-// ─── Audio accessors ─────────────────────────────────────────────────────
-
-/// Start the Oboe capture + playout streams. Returns `Err(code)` on
-/// failure. Idempotent on the wzp-native side.
-pub fn audio_start() -> Result<(), i32> {
-    let f = AUDIO_START.get().ok_or(-100_i32)?;
-    let ret = unsafe { f() };
-    if ret == 0 { Ok(()) } else { Err(ret) }
-}
-
-/// Stop both streams. Safe to call even if not running.
-pub fn audio_stop() {
-    if let Some(f) = AUDIO_STOP.get() {
-        unsafe { f() };
-    }
-}
-
-/// Read captured i16 PCM into `out`. Returns bytes actually copied.
-pub fn audio_read_capture(out: &mut [i16]) -> usize {
-    let Some(f) = AUDIO_READ_CAPTURE.get() else { return 0; };
-    unsafe { f(out.as_mut_ptr(), out.len()) }
-}
-
-/// Write i16 PCM into the playout ring. Returns samples enqueued.
-pub fn audio_write_playout(input: &[i16]) -> usize {
-    let Some(f) = AUDIO_WRITE_PLAYOUT.get() else { return 0; };
-    unsafe { f(input.as_ptr(), input.len()) }
-}
-
-pub fn audio_is_running() -> bool {
-    AUDIO_IS_RUNNING.get().map(|f| unsafe { f() } != 0).unwrap_or(false)
-}
-
-#[allow(dead_code)]
-pub fn audio_capture_latency_ms() -> f32 {
-    AUDIO_CAPTURE_LATENCY.get().map(|f| unsafe { f() }).unwrap_or(0.0)
-}
-
-#[allow(dead_code)]
-pub fn audio_playout_latency_ms() -> f32 {
-    AUDIO_PLAYOUT_LATENCY.get().map(|f| unsafe { f() }).unwrap_or(0.0)
-}

desktop/src-tauri/tauri.conf.json

@@ -1,36 +0,0 @@
-{
-  "productName": "WarzonePhone",
-  "version": "0.1.0",
-  "identifier": "com.wzp.desktop",
-  "build": {
-    "frontendDist": "../dist",
-    "devUrl": "http://localhost:1420",
-    "beforeDevCommand": "npm run dev",
-    "beforeBuildCommand": "npm run build"
-  },
-  "app": {
-    "windows": [
-      {
-        "title": "WarzonePhone",
-        "width": 400,
-        "height": 640,
-        "resizable": true,
-        "minWidth": 360,
-        "minHeight": 500
-      }
-    ],
-    "security": {
-      "csp": null
-    }
-  },
-  "bundle": {
-    "active": true,
-    "targets": "all",
-    "icon": [
-      "icons/icon.png"
-    ],
-    "android": {
-      "minSdkVersion": 26
-    }
-  }
-}

desktop/src/identicon.ts

@@ -1,110 +0,0 @@
-/**
- * Deterministic identicon generator — creates a unique symmetric pattern
- * from a hex fingerprint string, similar to MetaMask's Jazzicon / Ethereum blockies.
- *
- * Returns an SVG data URL that can be used as an <img> src.
- */
-
-function hashBytes(hex: string): number[] {
-  const clean = hex.replace(/[^0-9a-fA-F]/g, "");
-  const bytes: number[] = [];
-  for (let i = 0; i < clean.length; i += 2) {
-    bytes.push(parseInt(clean.substring(i, i + 2), 16));
-  }
-  // Pad to at least 16 bytes
-  while (bytes.length < 16) bytes.push(0);
-  return bytes;
-}
-
-function hslToRgb(h: number, s: number, l: number): [number, number, number] {
-  s /= 100;
-  l /= 100;
-  const k = (n: number) => (n + h / 30) % 12;
-  const a = s * Math.min(l, 1 - l);
-  const f = (n: number) =>
-    l - a * Math.max(-1, Math.min(k(n) - 3, Math.min(9 - k(n), 1)));
-  return [
-    Math.round(f(0) * 255),
-    Math.round(f(8) * 255),
-    Math.round(f(4) * 255),
-  ];
-}
-
-export function generateIdenticon(
-  fingerprint: string,
-  size: number = 36
-): string {
-  const bytes = hashBytes(fingerprint);
-
-  // Derive colors from first bytes
-  const hue1 = (bytes[0] * 360) / 256;
-  const hue2 = ((bytes[1] * 360) / 256 + 120) % 360;
-  const [r1, g1, b1] = hslToRgb(hue1, 65, 35); // dark bg
-  const [r2, g2, b2] = hslToRgb(hue2, 70, 55); // bright fg
-
-  const bg = `rgb(${r1},${g1},${b1})`;
-  const fg = `rgb(${r2},${g2},${b2})`;
-
-  // 5x5 grid, left-right symmetric (only need 3 columns)
-  const grid: boolean[][] = [];
-  for (let y = 0; y < 5; y++) {
-    const row: boolean[] = [];
-    for (let x = 0; x < 3; x++) {
-      const byteIdx = 2 + y * 3 + x;
-      row.push(bytes[byteIdx % bytes.length] > 128);
-    }
-    // Mirror: col 3 = col 1, col 4 = col 0
-    grid.push([row[0], row[1], row[2], row[1], row[0]]);
-  }
-
-  // Render SVG
-  const cellSize = size / 5;
-  const r = size * 0.12; // border radius
-  let rects = "";
-  for (let y = 0; y < 5; y++) {
-    for (let x = 0; x < 5; x++) {
-      if (grid[y][x]) {
-        rects += `<rect x="${x * cellSize}" y="${y * cellSize}" width="${cellSize}" height="${cellSize}" fill="${fg}"/>`;
-      }
-    }
-  }
-
-  const svg = `<svg xmlns="http://www.w3.org/2000/svg" width="${size}" height="${size}" viewBox="0 0 ${size} ${size}">
-    <rect width="${size}" height="${size}" rx="${r}" fill="${bg}"/>
-    ${rects}
-  </svg>`;
-
-  return `data:image/svg+xml,${encodeURIComponent(svg)}`;
-}
-
-/**
- * Create an <img> element with the identicon.
- * Click copies the fingerprint to clipboard.
- */
-export function createIdenticonEl(
-  fingerprint: string,
-  size: number = 36,
-  clickToCopy: boolean = true
-): HTMLImageElement {
-  const img = document.createElement("img");
-  img.src = generateIdenticon(fingerprint, size);
-  img.width = size;
-  img.height = size;
-  img.style.borderRadius = `${size * 0.12}px`;
-  img.style.cursor = clickToCopy ? "pointer" : "default";
-  img.title = fingerprint;
-
-  if (clickToCopy && fingerprint) {
-    img.addEventListener("click", (e) => {
-      e.stopPropagation();
-      navigator.clipboard.writeText(fingerprint).then(() => {
-        img.style.outline = "2px solid #4ade80";
-        setTimeout(() => {
-          img.style.outline = "";
-        }, 600);
-      });
-    });
-  }
-
-  return img;
-}