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feat(dred): continuous DRED tuning, PMTUD, extended Opus6k window

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- DredTuner: maps live network metrics (loss/RTT/jitter) to continuous
  DRED duration every ~500ms instead of discrete tier-locked values.
  Includes jitter-spike detection for pre-emptive Starlink-style boost.
- Opus6k DRED extended from 500ms to 1040ms (max libopus 1.5 supports)
- PMTUD: quinn MtuDiscoveryConfig with upper_bound=1452, 300s interval
- TrunkedForwarder respects discovered MTU (was hard-coded 1200)
- QuinnPathSnapshot exposes quinn internal stats + discovered MTU
- AudioEncoder trait: set_expected_loss() + set_dred_duration() methods
- PathMonitor: sliding-window jitter variance for spike detection
- Integrated into both Android and desktop send tasks in engine.rs
- 14 new tests (10 tuner unit + 4 encoder integration)
- Updated ARCHITECTURE.md, PROGRESS.md, PRD-dred-integration, PRD-mtu

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Siavash Sameni
2026-04-12 19:38:37 +04:00
parent 24cc74d93c
commit 766c9df442
19 changed files with 829 additions and 32 deletions
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55
desktop/src-tauri/src/engine.rs
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@@ -513,6 +513,13 @@ impl CallEngine {
encoder.set_aec_enabled(false);
let mut buf = vec![0i16; frame_samples];
// Continuous DRED tuning: poll quinn path stats every 25
// frames (~500 ms at 20 ms/frame) and adjust DRED duration +
// expected-loss hint based on real-time network conditions.
let mut dred_tuner = wzp_proto::DredTuner::new(config.profile.codec);
let mut frames_since_dred_poll: u32 = 0;
const DRED_POLL_INTERVAL: u32 = 25;
let mut heartbeat = std::time::Instant::now();
let mut last_rms: u32 = 0;
let mut last_pkt_bytes: usize = 0;
@@ -602,6 +609,34 @@ impl CallEngine {
Err(e) => error!("encode: {e}"),
}
// DRED tuner: poll quinn path stats periodically and
// adjust encoder DRED duration + expected-loss hint.
frames_since_dred_poll += 1;
if frames_since_dred_poll >= DRED_POLL_INTERVAL {
frames_since_dred_poll = 0;
let snap = send_t.quinn_path_stats();
let pq = send_t.path_quality();
if let Some(tuning) = dred_tuner.update(
snap.loss_pct,
snap.rtt_ms,
pq.jitter_ms,
) {
encoder.apply_dred_tuning(tuning);
if wzp_codec::dred_verbose_logs() {
info!(
dred_frames = tuning.dred_frames,
dred_ms = tuning.dred_frames as u32 * 10,
expected_loss = tuning.expected_loss_pct,
quinn_loss = format!("{:.1}", snap.loss_pct),
quinn_rtt = snap.rtt_ms,
jitter = pq.jitter_ms,
spike = dred_tuner.spike_boost_active(),
"DRED tuner adjusted encoder"
);
}
}
}
// Heartbeat every 2s with capture+encode+send state
if heartbeat.elapsed() >= std::time::Duration::from_secs(2) {
let fs = send_fs.load(Ordering::Relaxed);
@@ -1250,6 +1285,11 @@ impl CallEngine {
encoder.set_aec_enabled(false); // OS AEC or none
let mut buf = vec![0i16; frame_samples];
// Continuous DRED tuning (same as Android send task).
let mut dred_tuner = wzp_proto::DredTuner::new(config.profile.codec);
let mut frames_since_dred_poll: u32 = 0;
const DRED_POLL_INTERVAL: u32 = 25;
loop {
if !send_r.load(Ordering::Relaxed) {
break;
@@ -1285,6 +1325,21 @@ impl CallEngine {
}
Err(e) => error!("encode: {e}"),
}
// DRED tuner: poll quinn path stats periodically.
frames_since_dred_poll += 1;
if frames_since_dred_poll >= DRED_POLL_INTERVAL {
frames_since_dred_poll = 0;
let snap = send_t.quinn_path_stats();
let pq = send_t.path_quality();
if let Some(tuning) = dred_tuner.update(
snap.loss_pct,
snap.rtt_ms,
pq.jitter_ms,
) {
encoder.apply_dred_tuning(tuning);
}
}
}
});