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Re: AudioQueueNewOutput and the runloop
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Re: AudioQueueNewOutput and the runloop

  • Subject: Re: AudioQueueNewOutput and the runloop
  • From: Bill Phillips <email@hidden>
  • Date: Wed, 14 Nov 2012 10:49:57 -0500
To clarify: by "locking everything" I didn't mean putting an actual lock on everything. Just limiting all those operations so that they are only performed on that one thread.


On Wed, Nov 14, 2012 at 10:43 AM, Bill Phillips <email@hidden> wrote:
Patrick,

Have you tried performing *all* operations with that AVAsset on the same thread? I experienced hangs in this scenario when passing an AVAsset back and forth between a couple of threads, and locking everything on a single background thread fixed everything.

I did not specify a runloop for my AudioQueue, however, so it may be that it is actually all the setup code that has threading issues.


On Wed, Nov 14, 2012 at 10:31 AM, patrick machielse <email@hidden> wrote:
Op 9 nov. 2012, om 12:42 heeft Irradiated <email@hidden> het volgende geschreven:

> I believe you can pass a NULL in for the run loop modes and it will do its own thread management:
> AudioQueueNewOutput( &mDataFormat, UKSoundAQBufferCallback, self, NULL, NULL, 0, &mQueue );

That's what we tried initially.

It doesn't seem to matter if we let the queue handle its wown thread, if we supply a thread / runloop, or if we use IORemote directly instead of an AudioQueue to drive our audio processing. There seems to be some kind of issue using AVAssetReader in conjunction with playback.

https://devforums.apple.com/thread/172101

p.
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References: 
 >Re: AudioQueueNewOutput and the runloop (From: patrick machielse <email@hidden>)
 >Re: AudioQueueNewOutput and the runloop (From: Bill Phillips <email@hidden>)

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