iOS permissions triggered too early

[moulie415]

This seems to be an issue with the daily js forked version of react native webrtc and specifically this function

- (AVCaptureSession *)configuredCaptureSession {
  AVCaptureSession *captureSession = [[AVCaptureSession alloc] init];
  // Don't automatically configure application audio session, to prevent
  // configuration "thrashing" once WebRTC audio unit takes the reins.
  captureSession.automaticallyConfiguresApplicationAudioSession = NO;
  AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
  if (!audioDevice) {
    return nil;
  }
  NSError *inputError;
  AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:&inputError];
  if (inputError) {
    return nil;
  }
  if ([captureSession canAddInput:audioInput]) {
    [captureSession addInput:audioInput];
  }
  else {
    return nil;
  }
  AVCaptureAudioDataOutput *audioOutput = [[AVCaptureAudioDataOutput alloc] init];
  if ([captureSession canAddOutput:audioOutput]) {
    [captureSession addOutput:audioOutput];
  }
  else {
    return nil;
  }
  return captureSession;
}

This line AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:&inputError]; seems to be the culprit and its causing the permissions to be triggered before you even unmute yourself on iOS.

[filipi87]

Hi @moulie415,

Thanks for sharing this.

That is one of the culprits causing this behavior, but unfortunately, not the only one.

There is also this only issue, inside the webrtc framework:
Issue 5873: WebRTC framework asking for permissions to the microphone on iOS: https://bugs.chromium.org/p/webrtc/issues/detail?id=5873

Looks like on the most recent versions, after version M107, there is a possible way to fix this by providing our own version of the Audio Device Module (ADM).

There is already a task in our backlog to investigate this, and see if It is possible to fix this behavior without needing to create and keep a patch of WebRTC.