/*
bool BufferedAudioSource::init(float* interleavedData, Int64 numSamples)
{
return true;
}
*/
bool BufferedAudioSource::init(const RString& path, bool loadIntoMemory)
{
if(loadIntoMemory)
{
RPRINT("loading sound into memory...\n");
int channels = getNumChannels();
double length = getLength();
double srate = getSampleRate();
UInt32 totalFrames = getSampleRate() * getLength();
mBuffer.resize(getNumChannels(), totalFrames);
float *pWritePos = mBuffer.getData();
UInt32 numFrames = (UInt32)(getSampleRate());
UInt32 framesRead = 0;
UInt32 remainingFrames = totalFrames;
UInt32 tf = 0;
do
{
int version = 0;
framesRead = decodeData(pWritePos, remainingFrames >= numFrames ? numFrames : remainingFrames, version);
pWritePos += framesRead * getNumChannels();
tf += framesRead;
remainingFrames -= framesRead;
}
while(remainingFrames > 0 && framesRead > 0);
mEOF = true;
mLoadedInMemory = loadIntoMemory;
mBuffer.resize(getNumChannels(), tf);
}
else
{
mBuffer = RAudioBuffer(getNumChannels(), 0);
}
return true;
}
void ExtAudioFileAudioSource::doneDecoding()
{
RPRINT("freeing decoder memory.\n");
mReadBuffer.clear();
std::vector<float>().swap(mReadBuffer);
}
Int64 ExtAudioFileAudioSource::decodeData(float* buffer, UInt32 numFrames)
{
RPRINT("decoding data\n");
UInt32 numChannels = getNumChannels();
OSStatus err = noErr;
mReadBuffer.resize(numChannels * numFrames);
// Set up the buffers
setUpBuffers(&mReadBuffer[0], numChannels, numFrames);
// Read the data out of our file, filling our output buffer
UInt32 framesRead = numFrames;
if(!isLoadedInMemory())
{
RScopedLock l(&mDecodeLock);
err = ExtAudioFileRead (mAudioFile, &framesRead, mpBufferList);
}
else
{
err = ExtAudioFileRead (mAudioFile, &framesRead, mpBufferList);
}
if(err || framesRead == 0)
{
mEOF = true;
RPRINT("done decoding data\n");
return 0;
}
// The data is expected to be interlaced
for(UInt32 j = 0; j < numChannels; ++j)
{
float *pTemp = &mReadBuffer[j * numFrames];
float *pOut = &buffer[j];
for(UInt32 i = j; i < framesRead; i++)
{
*pOut = *pTemp++;
pOut += numChannels;
}
}
RPRINT("done decoding data\n");
return framesRead;
}
void ExtAudioFileAudioSource::setDecoderPosition(Int64 startFrame)
{
RScopedLock l(&mDecodeLock);
RPRINT("setting decoder position\n");
ExtAudioFileSeek(mAudioFile, startFrame);
if(startFrame < getLength() * getSampleRate())
mEOF = false;
}
void ExtAudioFileAudioSource::close()
{
RPRINT("closing...\n");
BufferedAudioSource::close();
if(mAudioFile)
{
ExtAudioFileDispose(mAudioFile);
mAudioFile = 0;
}
if(mpBufferList)
{
free (mpBufferList);
mpBufferList = 0;
}
RPRINT("done closing.\n");
}
