molluskandClaude Opus 4.8
99bd1f0c57
Add an opt-in Echo Cancellation toggle (Settings) that routes the call through PipeWire's module-echo-cancel (WebRTC AEC + noise suppression + AGC) instead of running an in-process canceller. PipeWire already sees both the mic and the speaker monitor, so it handles the echo-reference alignment for free and we avoid a C++ DSP dependency. src/audio/echo_cancel.rs (new): - enable(real_source, real_sink) loads the module via pactl (aec_method=webrtc), bound to the chosen devices with source_master/sink_master (defaults if unset), waits for the virtual nodes to appear, and returns an RAII guard that unloads the module on drop. Best-effort pre-clean of a stale instance from a crashed run. - EC_SOURCE / EC_SINK are the virtual cleaned-mic source and reference sink. core: when echo_cancellation is set on Join, load the module and point capture at EC_SOURCE / playback at EC_SINK; stash the guard in ActiveSession so it unloads on shutdown (after the audio streams release the nodes). Any failure logs + warns the UI and falls back to the direct devices — never blocks the call. config: new echo_cancellation_enabled (serde default false). app: Settings checkbox under Mic Sensitivity, applied on next room join. An ignored live smoke test covers the real load/unload path. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>