Talon
fb73b694d0
Two on-device bugs in the native iOS Voice-Processing path (Swift-only; no core/ABI change). 1. Voice Chat (VPIO) silent playback: doStartMicStream() called audioRestart() BEFORE startStream, so when the engine was already running (a remote stream had started it) it reopened with external_capture=false and opened a hardware miniaudio capture device. The announce-result restart then early-returns (engine already running) so that device was never dropped and fought the AVAudioEngine VPIO unit, silencing playback. Now: setExternalPlayback first, then startStream (stores external_feed synchronously), THEN audioRestart() — the core reopens in full external mode (no hardware devices). Added VPIO diagnostics: graph/route formats at start, ring written/read totals at teardown. 2. Stereo Mic / Studio quiet earpiece: the .builtInMicBtA2dp presets omit .defaultToSpeaker (it breaks A2DP) and skip forceSpeaker, so with no Bluetooth connected output pinned to the quiet receiver. New IOSAudioRouter.applyA2dpSpeakerFallback() overrides to the built-in speaker when no external (A2DP/wired/AirPlay) output is present and clears the override when one is — called after activation and on device-change route changes.