Audio queue start failed

Question

I\'m developing a project which has both audio streaming and playing audio from file. For audio streaming i\'m using AudioStreamer and for playing from file i\'m using avaud

Answer 1

You need to make the audio session active yourself after the interruption.

I don't know AVAudioPlayer, but if you were using the audio queue services directly, you could have something like this as your interruption handler:

void interruptionListener(void * inClientData, UInt32 inInterruptionState) {
  if (inInterruptionState == kAudioSessionEndInterruption) {
    OSStatus rc = AudioSessionSetActive(true);
    if (rc) {
      NSLog(@"AudioSessionSetActive(true) returned %d", rc);
    }
  }
}

and pass that into your AudioSessionInitialize() call.

You can restart the session lazily, too:

-(void)startPlaying {
  OSStatus rc = AudioQueueStart(queue, NULL);
  if (rc) {
    NSLog(@"startPlaying AudioQueueStart returned %d.", rc);

    if (rc == kAudioSessionNotActiveError) {
      rc = AudioSessionSetActive(true);
      if (rc) {
        NSLog(@"startPlaying - AudioSessionSetActive(true) returned %.d", rc);
      } else {
        NSLog(@"startPlaying - restarted Audio Session");
      }
    }
  }
}

Answer 2

I had the same problem, in more detail the error message was "hwiu" (hardware in use) or 1752656245. But I was using the MPMoviePlayerController before starting the audioStreamer. I only had to stop the MPMoviePlayerController ([moviePlayer stop]) before releasing it in the moviePlayBackDidFinish method. the stop should release some hardware componants.

I hope it helps