int app_OpenSound(int samples_per_sync, int sample_rate) {
Float64 sampleRate = 44100.0;
int i;
LOGDEBUG("app_SoundOpen()");
app_MuteSound();
if(preferences.muted)
{
return 0;
}
soundInit = 0;
in.mDataFormat.mSampleRate = sampleRate;
in.mDataFormat.mFormatID = kAudioFormatLinearPCM;
in.mDataFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger
| kAudioFormatFlagIsPacked;
in.mDataFormat.mBytesPerPacket = 4;
in.mDataFormat.mFramesPerPacket = 1;
in.mDataFormat.mBytesPerFrame = 2;
in.mDataFormat.mChannelsPerFrame = 2;
in.mDataFormat.mBitsPerChannel = 16;
/* Pre-buffer before we turn on audio */
UInt32 err;
err = AudioQueueNewOutput(&in.mDataFormat,
AQBufferCallback,
&in,
NULL,
kCFRunLoopCommonModes,
0,
&in.queue);
if (err) {
LOGDEBUG("AudioQueueNewOutput err %d\n", err);
}
in.frameCount = 512 * 1; //512; //(1024 * (16)) / 4;
UInt32 bufferBytes = in.frameCount * in.mDataFormat.mBytesPerFrame;
for (i=0; i<AUDIO_BUFFERS; i++) {
err = AudioQueueAllocateBuffer(in.queue, bufferBytes, &in.mBuffers[i]);
if (err) {
LOGDEBUG("AudioQueueAllocateBuffer[%d] err %d\n",i, err);
}
/* "Prime" by calling the callback once per buffer */
AQBufferCallback (&in, in.queue, in.mBuffers[i]);
}
soundInit = 1;
LOGDEBUG("app_QueueSample.AudioQueueStart");
err = AudioQueueStart(in.queue, NULL);
return 0;
}
int playbuffer(void *pcmbuffer, unsigned long len) {
AQCallbackStruct aqc;
UInt32 err, bufferSize;
int i;
aqc.mDataFormat.mSampleRate = SAMPLE_RATE;
aqc.mDataFormat.mFormatID = kAudioFormatLinearPCM;
aqc.mDataFormat.mFormatFlags =
kLinearPCMFormatFlagIsSignedInteger
| kAudioFormatFlagIsPacked;
aqc.mDataFormat.mBytesPerPacket = 4;
aqc.mDataFormat.mFramesPerPacket = 1;
aqc.mDataFormat.mBytesPerFrame = 4;
aqc.mDataFormat.mChannelsPerFrame = 2;
aqc.mDataFormat.mBitsPerChannel = 16;
aqc.frameCount = FRAME_COUNT;
aqc.sampleLen = len / BYTES_PER_SAMPLE;
aqc.playPtr = 0;
aqc.pcmBuffer = (sampleFrame *)pcmbuffer;
err = AudioQueueNewOutput(&aqc.mDataFormat,
AQBufferCallback,
&aqc,
NULL,
kCFRunLoopCommonModes,
0,
&aqc.queue);
if (err)
return err;
aqc.frameCount = FRAME_COUNT;
bufferSize = aqc.frameCount * aqc.mDataFormat.mBytesPerFrame;
for (i=0; i<AUDIO_BUFFERS; i++) {
err = AudioQueueAllocateBuffer(aqc.queue, bufferSize,
&aqc.mBuffers[i]);
if (err)
return err;
AQBufferCallback(&aqc, aqc.queue, aqc.mBuffers[i]);
}
err = AudioQueueStart(aqc.queue, NULL);
if (err)
return err;
struct timeval tv = {1.0, 0};
while(aqc.playPtr < aqc.sampleLen) { select(0, NULL, NULL, NULL, &tv); }
sleep(1);
return 0;
}
bool AudioQueueStreamOut::Open(const char *FileName)
{
delete [] mInfo.mPacketDescs;
mInfo.mPacketDescs = NULL;
m_totalFrames = 0;
mInfo.m_SeekToPacket = -1;
try {
CFURLRef sndFile = CFURLCreateFromFileSystemRepresentation (NULL, (const UInt8 *)FileName, strlen(FileName), false);
if (!sndFile) return false;
OSStatus result = AudioFileOpenURL (sndFile, 0x1/*fsRdPerm*/, 0/*inFileTypeHint*/, &mInfo.mAudioFile);
CFRelease (sndFile);
UInt32 size = sizeof(mInfo.mDataFormat);
XThrowIfError(AudioFileGetProperty(mInfo.mAudioFile,
kAudioFilePropertyDataFormat, &size, &mInfo.mDataFormat), "couldn't get file's data format");
printf ("File format: "); mInfo.mDataFormat.Print();
XThrowIfError(AudioQueueNewOutput(&mInfo.mDataFormat, AudioQueueStreamOut::AQBufferCallback, this,
NULL, kCFRunLoopCommonModes, 0, &mInfo.mQueue), "AudioQueueNew failed");
UInt32 bufferByteSize;
// we need to calculate how many packets we read at a time, and how big a buffer we need
// we base this on the size of the packets in the file and an approximate duration for each buffer
{
bool isFormatVBR = (mInfo.mDataFormat.mBytesPerPacket == 0 || mInfo.mDataFormat.mFramesPerPacket == 0);
// first check to see what the max size of a packet is - if it is bigger
// than our allocation default size, that needs to become larger
UInt32 maxPacketSize;
size = sizeof(maxPacketSize);
XThrowIfError(AudioFileGetProperty(mInfo.mAudioFile,
kAudioFilePropertyPacketSizeUpperBound, &size, &maxPacketSize), "couldn't get file's max packet size");
// adjust buffer size to represent about a half second of audio based on this format
CalculateBytesForTime (mInfo.mDataFormat, maxPacketSize, 0.5/*seconds*/, &bufferByteSize, &mInfo.mNumPacketsToRead);
if (isFormatVBR)
mInfo.mPacketDescs = new AudioStreamPacketDescription [mInfo.mNumPacketsToRead];
else
mInfo.mPacketDescs = NULL; // we don't provide packet descriptions for constant bit rate formats (like linear PCM)
printf ("Buffer Byte Size: %d, Num Packets to Read: %d\n", (int)bufferByteSize, (int)mInfo.mNumPacketsToRead);
}
// (2) If the file has a cookie, we should get it and set it on the AQ
size = sizeof(UInt32);
result = AudioFileGetPropertyInfo (mInfo.mAudioFile, kAudioFilePropertyMagicCookieData, &size, NULL);
if (!result && size) {
char* cookie = new char [size];
XThrowIfError (AudioFileGetProperty (mInfo.mAudioFile, kAudioFilePropertyMagicCookieData, &size, cookie), "get cookie from file");
XThrowIfError (AudioQueueSetProperty(mInfo.mQueue, kAudioQueueProperty_MagicCookie, cookie, size), "set cookie on queue");
delete [] cookie;
}
// prime the queue with some data before starting
mInfo.mDone = false;
mInfo.mCurrentPacket = 0;
for (UInt32 i = 0; i < sizeof(mInfo.mBuffers)/sizeof(mInfo.mBuffers[0]); ++i) {
XThrowIfError(AudioQueueAllocateBuffer(mInfo.mQueue, bufferByteSize, &mInfo.mBuffers[i]), "AudioQueueAllocateBuffer failed");
AQBufferCallback (this, mInfo.mQueue, mInfo.mBuffers[i]);
if (mInfo.mDone) break;
}
return IMUSIKStreamOutDefault::Create(NULL);
}
catch (CAXException e) {
char buf[256];
fprintf(stderr, "Error: %s (%s)\n", e.mOperation, e.FormatError(buf));
}
return false;
}