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Why a simple aif file doesn't play?
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Why a simple aif file doesn't play?


  • Subject: Why a simple aif file doesn't play?
  • From: Gabriele Palmas <email@hidden>
  • Date: Tue, 10 Feb 2009 11:57:11 -0500

Hi all,
I have a problem that I cannot figure out. I have a simple aif file; ss soon as the file start to get queuing in the buffer here is the result:

Queuing buffer 16000 for playback
Loading program into debugger…
GNU gdb 6.3.50-20050815 (Apple version gdb-962) (Sat Jul 26 08:14:40 UTC 2008)
..... [omitted]
(gdb)

Again any suggestions?
Here is is my playback function:
- (void)startPlayback
{
    playState.currentPacket = 0;
    [self setupAudioFormat:&playState.dataFormat];
    OSStatus status;
    status = AudioFileOpenURL(fileURL, 0x01, kAudioFileAIFFType, &playState.audioFile);
    if(status == 0) {
        status = AudioQueueNewOutput(&playState.dataFormat,
                                     AudioOutputCallback,
                                     &playState,
                                     CFRunLoopGetCurrent(),
                                     kCFRunLoopCommonModes,
                                     0,
                                     &playState.queue);
        if(status == 0){
            playState.playing = true;
            for(int i = 0; i < NUM_BUFFERS && playState.playing; i++){
                if(playState.playing){
                    AudioQueueAllocateBuffer(playState.queue, 16000, &playState.buffers[i]);
                    AudioOutputCallback(&playState, playState.queue, playState.buffers[i]);
                }
            }
            if(playState.playing){
                status = AudioQueueStart(playState.queue, NULL);
                if(status == 0){
                    labelStatus.text = @"Playing";
                }
            }
        }       
    }
    if(status != 0){
        [self stopPlayback];
        labelStatus.text = @"Play failed";
    }
}

I start thinking that I have some misconception!
Thank you.

Gabriele
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