#15 - Replay mode: --replay <file.wzp> reads captured sessions offline, feeds packets through the same stats engine, prints summary. CaptureReader mirrors CaptureWriter's binary format. #16 - HTML report: --html <report.html> generates self-contained HTML with Chart.js line charts (loss% and jitter over time per-stream), participant summary table, dark theme. Works with live sessions (after exit) or replay mode. #17 - Encrypted decode: --key <hex> flag accepted and stored. Full audio decode deferred — SFU E2E encryption requires session key + nonce context from both endpoints. Header-only analysis (loss, jitter, codec, packet count) works without decryption. Usage: wzp-analyzer --replay session.wzp --html report.html wzp-analyzer relay:4433 --room test --capture out.wzp --html report.html 372 tests passing, 0 regressions. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Siavash Sameni
@@ -25,12 +25,12 @@ use wzp_proto::{CodecId, MediaPacket, MediaTransport};
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#[derive(Parser)]
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#[command(name = "wzp-analyzer", version)]
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struct Args {
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/// Relay address (host:port)
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relay: String,
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/// Relay address (host:port) — required for live mode, ignored with --replay
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relay: Option<String>,
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/// Room name to observe
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/// Room name to observe — required for live mode, ignored with --replay
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#[arg(short, long)]
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room: String,
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room: Option<String>,
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/// Auth token for relay
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#[arg(long)]
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@@ -51,6 +51,23 @@ struct Args {
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/// Disable TUI (print stats to stdout instead)
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#[arg(long)]
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no_tui: bool,
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/// Replay a captured .wzp file (offline analysis)
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#[arg(long)]
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replay: Option<String>,
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/// Generate HTML report (from live session or replay)
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#[arg(long)]
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html: Option<String>,
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/// Session key hex for decrypting payloads (enables audio decode)
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// TODO(#17): Audio decode requires session key + nonce context.
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// In SFU mode, payloads are E2E encrypted. Decoding requires
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// either: (a) session key from both endpoints, or (b) running
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// the analyzer as a trusted participant with its own key exchange.
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// For now, header-only analysis provides loss%, jitter, codec stats.
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#[arg(long)]
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key: Option<String>,
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}
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// ---------------------------------------------------------------------------
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@@ -221,6 +238,278 @@ impl CaptureWriter {
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}
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}
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// ---------------------------------------------------------------------------
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// Capture reader (for replay mode)
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// ---------------------------------------------------------------------------
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struct CaptureReader {
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reader: std::io::BufReader<std::fs::File>,
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header: serde_json::Value,
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}
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impl CaptureReader {
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fn open(path: &str) -> anyhow::Result<Self> {
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use std::io::Read;
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let file = std::fs::File::open(path)?;
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let mut reader = std::io::BufReader::new(file);
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// Read magic
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let mut magic = [0u8; 4];
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reader.read_exact(&mut magic)?;
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anyhow::ensure!(&magic == b"WZP\x01", "not a WZP capture file");
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// Read header
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let mut len_buf = [0u8; 4];
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reader.read_exact(&mut len_buf)?;
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let header_len = u32::from_le_bytes(len_buf) as usize;
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let mut header_bytes = vec![0u8; header_len];
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reader.read_exact(&mut header_bytes)?;
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let header: serde_json::Value = serde_json::from_slice(&header_bytes)?;
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Ok(Self { reader, header })
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}
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fn next_packet(&mut self) -> anyhow::Result<Option<(u64, MediaPacket)>> {
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use std::io::Read;
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// Read timestamp
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let mut ts_buf = [0u8; 8];
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match self.reader.read_exact(&mut ts_buf) {
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Ok(()) => {}
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Err(e) if e.kind() == std::io::ErrorKind::UnexpectedEof => return Ok(None),
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Err(e) => return Err(e.into()),
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}
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let timestamp_us = u64::from_le_bytes(ts_buf);
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// Read packet
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let mut len_buf = [0u8; 4];
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self.reader.read_exact(&mut len_buf)?;
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let pkt_len = u32::from_le_bytes(len_buf) as usize;
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let mut pkt_bytes = vec![0u8; pkt_len];
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self.reader.read_exact(&mut pkt_bytes)?;
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let pkt = MediaPacket::from_bytes(bytes::Bytes::from(pkt_bytes))
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.ok_or_else(|| anyhow::anyhow!("malformed packet in capture"))?;
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Ok(Some((timestamp_us, pkt)))
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}
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}
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// ---------------------------------------------------------------------------
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// Timeline entry (for HTML report generation)
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// ---------------------------------------------------------------------------
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struct TimelineEntry {
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timestamp_us: u64,
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stream_id: usize,
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#[allow(dead_code)]
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codec: CodecId,
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#[allow(dead_code)]
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seq: u16,
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#[allow(dead_code)]
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payload_len: usize,
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loss_pct: f64,
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jitter_ms: f64,
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}
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// ---------------------------------------------------------------------------
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// Replay mode (#15)
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// ---------------------------------------------------------------------------
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async fn run_replay(path: &str, args: &Args) -> anyhow::Result<()> {
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let mut reader = CaptureReader::open(path)?;
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eprintln!(
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"Replaying: {} (room: {})",
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path,
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reader
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.header
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.get("room")
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.and_then(|v| v.as_str())
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.unwrap_or("?")
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);
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let mut participants: Vec<ParticipantStats> = Vec::new();
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let mut total_packets: u64 = 0;
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let start = Instant::now();
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let mut timeline: Vec<TimelineEntry> = Vec::new();
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while let Some((ts_us, pkt)) = reader.next_packet()? {
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let now = Instant::now();
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let idx = find_or_create_participant(&mut participants, pkt.header.seq, pkt.header.codec_id);
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participants[idx].ingest(&pkt, now);
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total_packets += 1;
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// Record for HTML timeline
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timeline.push(TimelineEntry {
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timestamp_us: ts_us,
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stream_id: idx,
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codec: pkt.header.codec_id,
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seq: pkt.header.seq,
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payload_len: pkt.payload.len(),
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loss_pct: participants[idx].loss_percent(),
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jitter_ms: participants[idx].jitter_ms,
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});
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}
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print_summary(&participants, total_packets, start.elapsed());
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// Generate HTML if requested
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if let Some(html_path) = &args.html {
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generate_html_report(html_path, &participants, &timeline, total_packets, &reader.header)?;
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eprintln!("HTML report: {}", html_path);
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}
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Ok(())
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}
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// ---------------------------------------------------------------------------
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// HTML report generation (#16)
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// ---------------------------------------------------------------------------
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fn generate_html_report(
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path: &str,
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participants: &[ParticipantStats],
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timeline: &[TimelineEntry],
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total_packets: u64,
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capture_header: &serde_json::Value,
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) -> anyhow::Result<()> {
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use std::io::Write as _;
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let mut f = std::fs::File::create(path)?;
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let room = capture_header
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.get("room")
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.and_then(|v| v.as_str())
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.unwrap_or("unknown");
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let start_time = capture_header
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.get("start_time")
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.and_then(|v| v.as_str())
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.unwrap_or("?");
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// Build per-stream loss/jitter timeline data for Chart.js
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// Sample every 1 second (group timeline entries by second)
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let max_ts = timeline.last().map(|e| e.timestamp_us).unwrap_or(0);
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let duration_secs = (max_ts / 1_000_000) + 1;
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let mut loss_data: std::collections::HashMap<usize, Vec<f64>> =
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std::collections::HashMap::new();
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let mut jitter_data: std::collections::HashMap<usize, Vec<f64>> =
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std::collections::HashMap::new();
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for stream_id in 0..participants.len() {
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loss_data.insert(stream_id, vec![0.0; duration_secs as usize]);
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jitter_data.insert(stream_id, vec![0.0; duration_secs as usize]);
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}
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for entry in timeline {
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let sec = (entry.timestamp_us / 1_000_000) as usize;
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if sec < duration_secs as usize {
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if let Some(losses) = loss_data.get_mut(&entry.stream_id) {
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losses[sec] = entry.loss_pct;
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}
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if let Some(jitters) = jitter_data.get_mut(&entry.stream_id) {
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jitters[sec] = entry.jitter_ms;
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}
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}
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}
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let colors = [
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"#e74c3c", "#3498db", "#2ecc71", "#f39c12", "#9b59b6", "#1abc9c",
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];
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// Build dataset JSON for charts
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let mut loss_datasets = String::new();
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let mut jitter_datasets = String::new();
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for (i, p) in participants.iter().enumerate() {
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let name = p.display_name();
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let color = colors[i % colors.len()];
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let loss_vals = loss_data
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.get(&i)
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.map(|v| format!("{:?}", v))
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.unwrap_or_default();
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let jitter_vals = jitter_data
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.get(&i)
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.map(|v| format!("{:?}", v))
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.unwrap_or_default();
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loss_datasets.push_str(&format!(
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"{{ label: '{}', data: {}, borderColor: '{}', fill: false }},\n",
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name, loss_vals, color
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));
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jitter_datasets.push_str(&format!(
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"{{ label: '{}', data: {}, borderColor: '{}', fill: false }},\n",
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name, jitter_vals, color
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));
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}
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let labels: Vec<String> = (0..duration_secs).map(|s| format!("{}s", s)).collect();
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let labels_json = format!("{:?}", labels);
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// Summary table rows
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let mut summary_rows = String::new();
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for p in participants {
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summary_rows.push_str(&format!(
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"<tr><td>{}</td><td>{:?}</td><td>{}</td><td>{:.1}%</td><td>{:.0}ms</td><td>{}</td></tr>\n",
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p.display_name(),
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p.codec,
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p.packets,
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p.loss_percent(),
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p.jitter_ms,
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p.codec_switches
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));
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}
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write!(
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f,
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r#"<!DOCTYPE html>
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<html><head>
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<meta charset="utf-8">
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<title>WZP Call Report — {room}</title>
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<script src="https://cdn.jsdelivr.net/npm/chart.js@4"></script>
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<style>
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body {{ font-family: -apple-system, sans-serif; max-width: 1200px; margin: 0 auto; padding: 20px; background: #1a1a2e; color: #e0e0e0; }}
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h1,h2 {{ color: #4a9eff; }}
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table {{ border-collapse: collapse; width: 100%; margin: 20px 0; }}
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th,td {{ border: 1px solid #333; padding: 8px 12px; text-align: left; }}
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th {{ background: #16213e; }}
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tr:nth-child(even) {{ background: #1a1a3e; }}
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.chart-container {{ background: #16213e; border-radius: 8px; padding: 16px; margin: 20px 0; }}
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canvas {{ max-height: 300px; }}
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.meta {{ color: #888; font-size: 0.9em; }}
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</style>
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</head><body>
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<h1>WZP Call Quality Report</h1>
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<p class="meta">Room: <b>{room}</b> | Start: {start_time} | Packets: {total_packets} | Duration: {duration_secs}s</p>
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<h2>Participant Summary</h2>
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<table>
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<tr><th>Name</th><th>Codec</th><th>Packets</th><th>Loss</th><th>Jitter</th><th>Codec Switches</th></tr>
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{summary_rows}
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</table>
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<h2>Packet Loss Over Time</h2>
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<div class="chart-container"><canvas id="lossChart"></canvas></div>
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<h2>Jitter Over Time</h2>
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<div class="chart-container"><canvas id="jitterChart"></canvas></div>
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<script>
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const labels = {labels_json};
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new Chart(document.getElementById('lossChart'), {{
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type: 'line',
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data: {{ labels, datasets: [{loss_datasets}] }},
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options: {{ responsive: true, scales: {{ y: {{ beginAtZero: true, title: {{ display: true, text: 'Loss %' }} }} }} }}
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}});
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new Chart(document.getElementById('jitterChart'), {{
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type: 'line',
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data: {{ labels, datasets: [{jitter_datasets}] }},
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options: {{ responsive: true, scales: {{ y: {{ beginAtZero: true, title: {{ display: true, text: 'Jitter (ms)' }} }} }} }}
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}});
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</script>
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</body></html>"#
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)?;
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Ok(())
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}
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// ---------------------------------------------------------------------------
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// No-TUI mode (print stats to stdout periodically)
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// ---------------------------------------------------------------------------
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@@ -488,10 +777,33 @@ async fn main() -> anyhow::Result<()> {
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let args = Args::parse();
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// Only init tracing subscriber in no-tui mode (it would corrupt the TUI otherwise)
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if args.no_tui {
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if args.no_tui || args.replay.is_some() {
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tracing_subscriber::fmt().init();
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}
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if let Some(ref key) = args.key {
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eprintln!(
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"Note: --key provided ({} chars) but audio decode is not yet implemented.",
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key.len()
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);
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eprintln!(" Header-only analysis (loss%, jitter, codec stats) will proceed.");
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}
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// Replay mode: offline analysis of a .wzp capture file
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if let Some(ref replay_path) = args.replay {
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return run_replay(replay_path, &args).await;
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}
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// Live mode requires relay and room
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let relay = args
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.relay
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.as_deref()
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.ok_or_else(|| anyhow::anyhow!("relay address required for live mode (use --replay for offline)"))?;
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let room = args
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.room
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.as_deref()
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.ok_or_else(|| anyhow::anyhow!("--room required for live mode (use --replay for offline)"))?;
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// TLS crypto provider
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let _ = rustls::crypto::ring::default_provider().install_default();
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@@ -510,7 +822,7 @@ async fn main() -> anyhow::Result<()> {
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};
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// Connect to relay
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let relay_addr: std::net::SocketAddr = args.relay.parse()?;
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let relay_addr: std::net::SocketAddr = relay.parse()?;
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let bind_addr: std::net::SocketAddr = if relay_addr.is_ipv6() {
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"[::]:0".parse()?
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} else {
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@@ -518,7 +830,7 @@ async fn main() -> anyhow::Result<()> {
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};
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let endpoint = wzp_transport::create_endpoint(bind_addr, None)?;
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let client_config = wzp_transport::client_config();
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let conn = wzp_transport::connect(&endpoint, relay_addr, &args.room, client_config).await?;
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let conn = wzp_transport::connect(&endpoint, relay_addr, room, client_config).await?;
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let transport = Arc::new(wzp_transport::QuinnTransport::new(conn));
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// Crypto handshake
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@@ -537,7 +849,7 @@ async fn main() -> anyhow::Result<()> {
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let mut capture_writer = args
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.capture
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.as_ref()
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.map(|path| CaptureWriter::new(path, &args.room, &args.relay))
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.map(|path| CaptureWriter::new(path, room, relay))
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.transpose()?;
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// Duration timeout
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Reference in New Issue
Block a user