void ofxFFTBase::setBufferSize(int value) {
int bufferSizeNew = ofNextPow2(value);
if(bufferSize == bufferSizeNew) {
return;
}
bufferSize = bufferSizeNew;
binSize = (int)(bufferSize * 0.5);
killFFT();
initFFT();
initAudioData(fftData, bufferSize);
}
void ofxFFTBase :: setNoOfBands( int value )
{
int audioNoOfBandsNew;
audioNoOfBandsNew = ofNextPow2( value );
if( audioNoOfBands == audioNoOfBandsNew )
return;
audioNoOfBands = OFX_FFT_NO_OF_BANDS;
audioNoOfBandsHalf = (int)( audioNoOfBands * 0.5 );
killFFT();
initFFT();
initAudioData( rawData, getNoOfBands() );
initAudioData( fftData, getNoOfBands() );
}
void ofxFFTBase::initFFT() {
killFFT();
_fft = new fft(bufferSize);
buffer = (float *)malloc(bufferSize * sizeof(float));
memset(buffer, 0, bufferSize * sizeof(float));
magnitudes = (float *)malloc(binSize * sizeof(float));
memset(magnitudes, 0, binSize * sizeof(float));
magnitudesDB = (float *)malloc(binSize * sizeof(float));
memset(magnitudesDB, 0, binSize * sizeof(float));
phases = (float *)malloc(binSize * sizeof(float));
memset(phases, 0, binSize * sizeof(float));
window = (float *)malloc(bufferSize * sizeof(float));
memset(window, 0, bufferSize * sizeof(float));
fft::genWindow(3, bufferSize, window);
}
ofxFFTBase :: ofxFFTBase()
{
specData = NULL;
fftMagnitude = NULL;
fftPhase = NULL;
fftPower = NULL;
fftFreq = NULL;
setMaxDecay( 0.995 );
setPeakDecay( 0.96 );
setThreshold( 0.5 );
setMirrorData( false );
renderBorder = 1;
audioNoOfBands = OFX_FFT_NO_OF_BANDS;
audioNoOfBandsHalf = (int)( audioNoOfBands * 0.5 );
killFFT();
initFFT();
initAudioData( rawData, audioNoOfBandsHalf );
initAudioData( fftData, audioNoOfBandsHalf );
}
ofxFFTBase :: ~ofxFFTBase()
{
killFFT();
}
