OSStatus OutputImplAudioUnit::Track::renderNotifyCallback( void * audioTrack, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData )
{
OSStatus err = noErr;
if( *ioActionFlags &= kAudioUnitRenderAction_PostRender ) {
OutputImplAudioUnit::Track * theTrack = reinterpret_cast<OutputImplAudioUnit::Track *>( audioTrack );
if( ! theTrack->isPlaying() ) {
//disable render callback
AURenderCallbackStruct rcbs;
rcbs.inputProc = NULL;
rcbs.inputProcRefCon = NULL;
err = AudioUnitSetProperty( theTrack->mOutput->mMixerUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, theTrack->mInputBus, &rcbs, sizeof(rcbs) );
if( err ) {
}
err = AudioUnitRemoveRenderNotify( theTrack->mOutput->mMixerUnit, OutputImplAudioUnit::Track::renderNotifyCallback, audioTrack );
if( err ) {
}
theTrack->mOutput->removeTrack( theTrack->getTrackId() );
//now the track should be dead
}
}
return err;
}
void
gst_core_audio_remove_render_callback (GstCoreAudio * core_audio)
{
AURenderCallbackStruct input;
OSStatus status;
/* Deactivate the render callback by calling SetRenderCallback
* with a NULL inputProc.
*/
input.inputProc = NULL;
input.inputProcRefCon = NULL;
status = AudioUnitSetProperty (core_audio->audiounit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Global, 0, /* N/A for global */
&input, sizeof (input));
if (status) {
GST_WARNING_OBJECT (core_audio->osxbuf, "Failed to remove render callback %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
}
/* Remove the RenderNotify too */
status = AudioUnitRemoveRenderNotify (core_audio->audiounit,
(AURenderCallback) gst_core_audio_render_notify, core_audio);
if (status) {
GST_WARNING_OBJECT (core_audio->osxbuf,
"Failed to remove render notify callback %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (status));
}
/* We're deactivated.. */
core_audio->io_proc_needs_deactivation = FALSE;
core_audio->io_proc_active = FALSE;
}
