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I am using below code to loop a single playerItem with the AVQueuePlayer:

-(void) init {
    _soundPlayer = [ [ AVQueuePlayer alloc ] init ];
    [ _soundPlayer addObserver: self forKeyPath: @"status" options: NSKeyValueObservingOptionNew context: NULL ];
    [ [ NSNotificationCenter defaultCenter ] addObserver: self selector: @selector ( playerItemDidReachEnd: ) name: AVPlayerItemDidPlayToEndTimeNotification object: nil ];
    [ [ NSNotificationCenter defaultCenter ] postNotificationName: AVPlayerItemDidPlayToEndTimeNotification object: nil ];
}

- ( void ) observeValueForKeyPath: ( NSString * ) keyPath ofObject: ( AVPlayer * ) object change: ( NSDictionary * ) change context: ( void * ) context {
if ( _soundPlayer.status == AVPlayerStatusReadyToPlay )
    [ _soundPlayer play ];
}

- ( void ) playerItemDidReachEnd: ( NSNotification * ) notification {
    AVPlayerItem *playerItem = [ [ AVPlayerItem alloc ] initWithURL: [ NSURL fileURLWithPath: _playerItemFilePath ] ];
    [ _soundPlayer insertItem: playerItem afterItem: nil ];
    [ playerItem release ];
}

It works fine on the simulator, even though the instruments indicated that a leak something like AudioToolbox SimAggregateDevice::SimAggregateDevice(__CFString const*, __CFString const*, long&), people said that is just some "frame leaks", it will be fine on the device, but when I run it on device, no leaks indicated from instruments, but crash instead...Anything I miss? Thanks if anyone can help me on this.

Sometimes playerItem would be stream file online, so can not use AVAudioPlayer instead.

Finally, I found that is because of the _playerItemFilePath. It is no longer existed, the NSString return by NSBundle's method pathForResource need to be retained. But I still wondering why it can be run on the simulator. After all, the leak about audioToolbox is also fixed, so anyone meet the "frame leaks" some people mentioned may be need to look around the code somewhere again. It would come out because of some small mistakes.

pablasso
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GeFo.GT
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  • Thank you. The SECOND time when it perform "playerItemDidReachEnd". – GeFo.GT May 08 '11 at 16:16
  • Hi @middaparka, you do remind me, it crashed because of the var "_playerItemFilePath" is no longer exist, the nsstring return by NSBundle's method pathForResource, need to be retained. But I am still wondering why it can be run on the simulator? – GeFo.GT May 08 '11 at 16:24
  • No idea - it's hard to know without seeing the _playerItemFilePath bits and pieces. (And even then, the simulator's behaviour isn't always identical to an actual device, as it's a simulator, not an emulator.) – John Parker May 08 '11 at 16:29

0 Answers0