Apple

Not sure this is the best thing to do, but what we actually do is start a timer when the completion proc is called, so that it starts checking for the actual playback position and when it reaches the end, we know the playout is over.

On 23 Jul 2012, at 16:38, Robert Carroll <email@hidden> wrote:

Hi,

With an audiograph fileplayer, when does the audiofileregion.mCompletionProc fire? Is this documented anywhere?

I assumed this meant once the fileregion has been played, but it seems to occur when it is read into memory.

memset (&fileRegion.mTimeStamp, 0, sizeof(fileRegion.mTimeStamp));
fileRegion.mTimeStamp.mFlags = kAudioTimeStampSampleTimeValid;
fileRegion.mTimeStamp.mSampleTime = 0;
fileRegion.mCompletionProc = completionListenerProc;

fileRegion.mCompletionProcUserData = NULL;

fileRegion.mAudioFile = inputFile;

fileRegion.mLoopCount = 0; //do not loop
fileRegion.mStartFrame = 0;
fileRegion.mFramesToPlay = (UInt32)44100;

void completionListenerProc(
//OSStatus completionListenerProc(
void * inRefCon,
AudioUnit ci,
AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement)
{

NSLog(@"completionListenerProc: fileplayer complete!");

//return noErr;
}

References:
	>Audiograph fileRegion.mCompletionProc (From: Robert Carroll <email@hidden>)