fix: graceful Ctrl+C recording + relay echo mode

- --record now handles Ctrl+C: saves PCM file before exiting
- Relay without --remote runs in echo mode (loops packets back to sender)
  instead of sink mode, enabling single-relay audio testing
- recv task returns collected PCM via channel for clean file write

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Siavash Sameni
2026-03-27 16:32:12 +04:00
parent df80ad5343
commit b147de5ae9
2 changed files with 77 additions and 53 deletions

View File

@@ -290,16 +290,23 @@ async fn main() -> anyhow::Result<()> {
info!(%remote_addr, "session ended");
}
None => {
// No remote relay configured — just receive and log (sink mode)
warn!("no remote relay configured, running in sink mode");
// No remote relay — echo mode: send packets back to the sender.
// This lets two clients on the same relay talk to each other,
// or a single client hear its own audio looped back.
info!("no remote relay configured, running in echo mode");
let mut echo_count = 0u64;
loop {
match client_transport.recv_media().await {
Ok(Some(packet)) => {
tracing::trace!(
seq = packet.header.seq,
block = packet.header.fec_block,
"received media packet (sink)"
);
// Echo the packet back to the sender
if let Err(e) = client_transport.send_media(&packet).await {
error!("echo send error: {e}");
break;
}
echo_count += 1;
if echo_count % 250 == 0 {
info!(echoed = echo_count, "echo mode stats");
}
}
Ok(None) => {
info!(%remote_addr, "connection closed");