Re: Problem with AudioQueueOfflineRender in iOS4
Re: Problem with AudioQueueOfflineRender in iOS4
- Subject: Re: Problem with AudioQueueOfflineRender in iOS4
- From: Zachary Kulis <email@hidden>
- Date: Fri, 02 Jul 2010 12:29:04 -0400
Pierre,
If you have access to any platform other than the iPod Touch 2G, I would
give your code a try on that platform. I tried my test code on an iPhone
3G yesterday, and neither the strange audio feedback nor the issues with
the AQ offline render method occurred (the offline render function
always returned non-zero frames decoded). I think that the issue may be
hardware-dependent; I've submitted a bug report and the Core Audio team
is taking a look.
-Zach
> Doug,
>
>
>>> There are some quite well known apps using offline rendering without issues like that.
>>>
> Tbh, that was my thought as well. Since it works in the simulator, I
> figured it might be some sort of resource starvation but Instruments
> indicated otherwise (at least as far as memory and CPU cycles are
> concerned). That left only threading and I've just gotten it to work
> by moving the offline render method back onto the main thread. So
> it's obviously some sort of contention issue (for me anyway). I'll
> need to rethink my threading implementation, it seems, as I obviously
> don't want it on the main thread. But it doesn't appear to be a bug
> on your side.
>
> Thanks and regards
>
> Pierre
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