Audio Device Optimization

allow listen-only mode in AudioUnit, adjust when category changes (webrtc-sdk#2)

release mic when category changes (webrtc-sdk#5)

Change defaults to iOS defaults (webrtc-sdk#7)

Sync audio session config (webrtc-sdk#8)

feat: support bypass voice processing for iOS. (webrtc-sdk#15)

Remove MacBookPro audio pan right code (webrtc-sdk#22)

fix: Fix can't open mic alone when built-in AEC is enabled. (webrtc-sdk#29)

feat: add audio device changes detect for windows. (webrtc-sdk#41)

fix Linux compile (webrtc-sdk#47)

AudioUnit: Don't rely on category switch for mic indicator to turn off (webrtc-sdk#52)

Stop recording on mute (turn off mic indicator) (webrtc-sdk#55)

Cherry pick audio selection from m97 release (webrtc-sdk#35)

[Mac] Allow audio device selection (webrtc-sdk#21)

RTCAudioDeviceModule.outputDevice / inputDevice getter and setter (webrtc-sdk#80)

Co-authored-by: Hiroshi Horie <548776+hiroshihorie@users.noreply.github.com>
Co-authored-by: David Zhao <dz@livekit.io>

sdk/objc/api/peerconnection/RTCPeerConnectionFactory+Native.h

@@ -73,6 +73,12 @@ NS_ASSUME_NONNULL_BEGIN
     initWithEncoderFactory:(nullable id<RTC_OBJC_TYPE(RTCVideoEncoderFactory)>)encoderFactory
             decoderFactory:(nullable id<RTC_OBJC_TYPE(RTCVideoDecoderFactory)>)decoderFactory;
 
+- (instancetype)
+    initWithBypassVoiceProcessing:(BOOL)bypassVoiceProcessing
+                   encoderFactory:(nullable id<RTC_OBJC_TYPE(RTCVideoEncoderFactory)>)encoderFactory
+                   decoderFactory:
+                       (nullable id<RTC_OBJC_TYPE(RTCVideoDecoderFactory)>)decoderFactory;
+
 /** Initialize an RTCPeerConnection with a configuration, constraints, and
  *  dependencies.
  */

sdk/objc/native/src/audio/audio_device_ios.mm

@@ -62,6 +62,16 @@
 const UInt16 kFixedPlayoutDelayEstimate = 30;
 const UInt16 kFixedRecordDelayEstimate = 30;
 
+enum AudioDeviceMessageType : uint32_t {
+  kMessageTypeInterruptionBegin,
+  kMessageTypeInterruptionEnd,
+  kMessageTypeValidRouteChange,
+  kMessageTypeCanPlayOrRecordChange,
+  kMessageTypePlayoutGlitchDetected,
+  kMessageOutputVolumeChange,
+  kMessageTypeAudioWillRecord,
+};
+
 using ios::CheckAndLogError;
 
 #if !defined(NDEBUG)