/**
* @param aVowel {double} interpolated value within
* the range of the amount specified in the coeffs Array
*/
FormantFilter::FormantFilter( double aVowel )
{
int i = 0;
for ( i; i < 11; i++ )
_currentCoeffs[ i ] = 0.0;
for ( i = 0; i < 10; i++ )
_memory[ i ] = 0.0;
calculateCoeffs();
setVowel( aVowel );
}
void BEQBaseUGenInternal::processBlock(bool& shouldDelete, const unsigned int blockID, const int channel) throw()
{
int numSamplesToProcess = uGenOutput.getBlockSize();
float* outputSamples = uGenOutput.getSampleData();
float* inputSamples = inputs[Input].processBlock(shouldDelete, blockID, channel);
float* freqSamples = inputs[Freq].processBlock(shouldDelete, blockID, channel);
float* controlSamples = inputs[Control].processBlock(shouldDelete, blockID, channel);
float* gainSamples = inputs[Gain].processBlock(shouldDelete, blockID, channel);
float newFreq = *freqSamples;
float newControl = *controlSamples;
float newGain = *gainSamples;
float y0;
if((currentFreq != newFreq) || (currentControl != newControl) || (currentGain != newGain))
{
while(numSamplesToProcess--)
{
calculateCoeffs(*freqSamples++, *controlSamples++, *gainSamples++);
y0 = *inputSamples++ + b1 * y1 + b2 * y2;
*outputSamples++ = (float)(a0 * y0 + a1 * y1 + a2 * y2);
y2 = y1;
y1 = y0;
}
currentFreq = *(freqSamples-1);
currentControl = *(controlSamples-1);
currentGain = *(gainSamples-1);
}
else
{
while(numSamplesToProcess--)
{
y0 = *inputSamples++ + b1 * y1 + b2 * y2;
*outputSamples++ = a0 * y0 + a1 * y1 + a2 * y2;
y2 = y1;
y1 = y0;
}
}
y1 = zap(y1);
y2 = zap(y2);
}
