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Re: iOS8: AudioOutputUnitStart() always fails after rejecting a phone call
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Re: iOS8: AudioOutputUnitStart() always fails after rejecting a phone call

  • Subject: Re: iOS8: AudioOutputUnitStart() always fails after rejecting a phone call
  • From: Douglas Scott <email@hidden>
  • Date: Mon, 19 Jan 2015 13:36:59 -0800
Just as a starting point:  if you grep that error in the public audio headers, you will find it is:

AVAudioSessionErrorCodeCannotStartPlaying = '!pla', /* 0x21706C61, 561015905 */


with description:

  @constant AVAudioSessionErrorCodeCannotStartPlaying
The app is not allowed to start recording and/or playing, usually because of a lack of audio key in
  its Info.plist.  This could also happen if the app has this key but uses a category that can't record 
  and/or play in the background (AVAudioSessionCategoryAmbient, AVAudioSessionCategorySoloAmbient, etc.).

On Jan 19, 2015, at 12:11 PM, Beinan Li <email@hidden> wrote:

Hi CoreAudio,

Our app used to handle interruption correctly with the registered interruption listener.
Now on iOS 8 under kAudioSessionCategory_AmbientSound category,
whenever we reject a phone call, the call to AudioOutputUnitStart() for resuming the 
audio pipeline always returns: 

ERROR:     [0x3afe09dc] 1230: AUIOClient_StartIO failed (561015905)

And our apps will have no sound as a result.

We set it to retry on fails but it would always fail on retries.

We were we missing?

Thanks,
Beinan

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  • Follow-Ups:
    • Re: iOS8: AudioOutputUnitStart() always fails after rejecting a phone call
      • From: Beinan Li <email@hidden>
References: 
 >iOS8: AudioOutputUnitStart() always fails after rejecting a phone call (From: Beinan Li <email@hidden>)

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