Re: AudioFileClose() crashing on iOS after playback
Re: AudioFileClose() crashing on iOS after playback
- Subject: Re: AudioFileClose() crashing on iOS after playback
- From: Chris Santoro <email@hidden>
- Date: Sat, 2 Oct 2010 17:46:51 -0400
Hi Doug,
Thanks! That seems to be it. I was releasing the URL right after successfully opening the file, and getting an AudioFileID. Although, I don't understand why that would be a problem, conceptually. I would think all I'd have to do is keep a reference to the file handle (AudioFileID) around. But apparently the audio file object keeps a reference to the URL it was opened with? I wouldn't expect that to be the behavior, but I guess there's a good reason for it?
Thanks again,
Chris
On Fri, Oct 1, 2010 at 11:43 AM, Doug Wyatt
<email@hidden> wrote:
Are you overreleasing the URL that was passed to AudioFileCreateWithURL?
Doug
On Sep 30, 2010, at 22:12 , Chris Santoro wrote:
> Hi Everyone,
>
> I'm trying to do some simple file playback on the iPhone (SDK 4.1). I wrote an audio engine using RemoteIO that does recording (with input monitoring), and playback. Everything works fine except for the playback at the moment. Whenever I try to close the file that I've been playing back (for instance, when hitting the end of the file), I get an EXC_BAD_ACCESS. The audio file handle that I'm trying to close is not NULL. It's still a good file for all I know. The code is modeled after AudioPlayer in SpeakHere, and does everything the same as far as I can tell, except I'm using rIO instead of Audio Queue Services. Audio format is Linear PCM.
>
> My playback callback uses AudioFileReadBytes() and continues to read bytes from the file until it reads less than the requested number. Then it calls a Stop() function that calls AudioOutputUnitStop() and AudioFileClose(). It crashes when trying to close the file. The entire file plays back successfully before crashing on AudioFileClose().
>
> Any ideas on what could cause AudioFileClose() to crash in this scenario?
>
> Here's the stack trace if it helps. I'm stumped.
>
> #0 0x3510741c in objc_msgSend
> #1 0x35750c74 in CFRelease
> #2 0x360a5964 in AudioFileObject::~AudioFileObject
> #3 0x360a58ec in CAFAudioFile::~CAFAudioFile
> #4 0x360a57f0 in AudioFileObjectHandle::~AudioFileObjectHandle
> #5 0x360a5130 in AudioFileClose
> #6 0x000438ea in IOEngine::StopPlayback at IOEngine.mm:526
> #7 0x000449c6 in IOEngine::outputCallback at IOEngine.mm:116
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