void appendBuffer( AudioBuffer* aBuffer )
{
int bufferSize = aBuffer->bufferSize;
if ( DiskWriter::cachedBuffer == 0 )
generateOutputBuffer();
// TODO: currently MONO ONLY !!
SAMPLE_TYPE* channelBuffer = aBuffer->getBufferForChannel( 0 );
int writerIndex = DiskWriter::outputWriterIndex;
int MAX_VALUE = 32767; // convert floats to shorts
// write floats as short values
for ( int i = 0; i < bufferSize; ++i )
{
short int sample = ( short int )( channelBuffer[ i ] * MAX_VALUE );
if ( sample > MAX_VALUE )
sample = MAX_VALUE;
else if ( sample < -MAX_VALUE )
sample = -MAX_VALUE;
DiskWriter::cachedBuffer[ writerIndex + i ] = sample;
}
DiskWriter::outputWriterIndex = writerIndex + bufferSize;
}
/**
* prepare a new iteration of recording
*/
void prepare( std::string aOutputDir, int aBufferSize, int amountOfChannels )
{
outputDirectory = aOutputDir;
outputBufferSize = aBufferSize;
generateOutputBuffer( amountOfChannels );
}
/**
* append a AudioBuffer into the write buffer
*/
void appendBuffer( AudioBuffer* aBuffer )
{
int bufferSize = aBuffer->bufferSize;
int channelAmount = aBuffer->amountOfChannels;
if ( DiskWriter::cachedBuffer == 0 )
generateOutputBuffer();
int writerIndex = DiskWriter::outputWriterIndex;
int MAX_VALUE = 32767; // convert samples to shorts
// write samples into PCM short buffer
for ( int i = 0; i < bufferSize; ++i, writerIndex += channelAmount )
{
for ( int c = 0; c < channelAmount; ++c )
{
SAMPLE_TYPE* channelBuffer = aBuffer->getBufferForChannel( c );
short int sample = ( short int )( channelBuffer[ i ] * MAX_VALUE );
if ( sample > MAX_VALUE )
sample = MAX_VALUE;
else if ( sample < -MAX_VALUE )
sample = -MAX_VALUE;
DiskWriter::cachedBuffer[ writerIndex + c ] = sample;
}
}
DiskWriter::outputWriterIndex = writerIndex;
}
/**
* append an AudioBuffer into the write buffer
*/
void appendBuffer( AudioBuffer* aBuffer )
{
int bufferSize = aBuffer->bufferSize;
int channelAmount = aBuffer->amountOfChannels;
if ( cachedBuffer == 0 )
generateOutputBuffer( channelAmount );
cachedBuffer->mergeBuffers( aBuffer, 0, outputWriterIndex, MAX_PHASE );
outputWriterIndex += bufferSize;
}
/**
* append the actual output buffer from the engine
* into the write buffer
*/
void appendBuffer( float* aBuffer, int aBufferSize, int amountOfChannels )
{
if ( cachedBuffer == 0 )
generateOutputBuffer( amountOfChannels );
// write samples into cache buffers
for ( int i = 0, c = 0; i < aBufferSize; ++i, ++outputWriterIndex, c += amountOfChannels )
{
for ( int ci = 0; ci < amountOfChannels; ++ci )
cachedBuffer->getBufferForChannel( ci )[ outputWriterIndex ] = aBuffer[ c + ci ];
}
}
