void play() {
OSStatus status;
aqData.mIsRunning = true; // 1
aqData.mCurrentPacket = 0; // 1
primeBuffer();
Float32 gain = 1.0; // 1
// Optionally, allow user to override gain setting here
status = AudioQueueSetParameter ( // 2
aqData.mQueue, // 3
kAudioQueueParam_Volume, // 4
gain // 5
);
checkStatus(status);
status = AudioQueueStart ( // 2
aqData.mQueue, // 3
NULL // 4
);
checkStatus(status);
}
void seekToPacket(uint64_t packet) {
AudioQueueStop(aqData.mQueue, true);
aqData.mCurrentPacket = rand()%1000;
primeBuffer();
AudioQueueStart(aqData.mQueue, NULL);
}
static OSStatus outputRenderProc(void *inRefCon, AudioUnitRenderActionFlags *inActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumFrames, AudioBufferList *ioData)
{
au_instance_t *p = (au_instance_t*) inRefCon;
/* printf("outputRenderProc, (bufs=%d, buf[0].chs=%d), buf=%p, size=%d\n", ioData->mNumberBuffers, ioData->mBuffers[0].mNumberChannels, ioData->mBuffers[0].mData, ioData->mBuffers[0].mDataByteSize); */
int res = primeBuffer(p, ioData->mBuffers[0].mData, ioData->mBuffers[0].mDataByteSize / (p->stereo ? 4 : 2));
/* printf(" - primed: %d samples (%d bytes)\n", res, res * (p->stereo ? 4 : 2)); */
if (res < 0) res = 0;
ioData->mBuffers[0].mDataByteSize = res * (p->stereo ? 4 : 2);
if (res == 0) {
/* printf(" - no input, stopping unit\n"); */
AudioOutputUnitStop(p->outUnit);
}
return noErr;
}
