No audio on iOS after first webrtc call

[gavrilikhin-d]

There was a very strange bug in our application related to react-native-incall-manager and @livekit/react-native-webrtc. It appeared only after we migrated from react-native-webrtc to @livekit/react-native-webrtc

On iOS, first webrtc connection has no issues whatsoever, but every consequent connection has no sound for remote audio stream and doesn't send bytes for local audio stream.

We couldn't figure out exact reason, however restarting in-call manager after every call has helped to mitigate the issue

  useEffect(() => {
    InCallManager.stop()
    InCallManager.start({ media: "video" })
  }, [])

Versions of our dependencies:

"react-native-incall-manager": "^4.2.1",
"@livekit/react-native": "^2.7.4",
"@livekit/react-native-webrtc": "^125.0.9",
"livekit-client": "^2.13.3",

[gavrilikhin-d]

I've opened the same issue in react-native-webrtc/react-native-incall-manager#254 as well

[gavrilikhin-d]

We now use a different workaround, that works perfectly!

export default function useAudioRouting() {
  useEffect(() => {
    startAudioSession()
    return () => {
      AudioSession.stopAudioSession()
    }
  }, [])
}

async function startAudioSession() {
  // Default config already correctly handles headset and bluetooth audio routing
  await AudioSession.configureAudio({})
  await AudioSession.setAppleAudioConfiguration({
    audioCategory: "playAndRecord",
    audioCategoryOptions: [
      "mixWithOthers",
      "allowAirPlay",
      "allowBluetooth",
      "allowBluetoothA2DP",
      "defaultToSpeaker"
    ],
    audioMode: "videoChat"
  })
  await AudioSession.startAudioSession()
}

Looks like livekit/webrct does some evil magic with AVAudioSession itself, which interferes with incall-manager