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Version 4.4.0

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This commit is contained in:
Gary Scavone
2013-09-29 23:11:39 +02:00
committed by Stephen Sinclair
parent d199342e86
commit eccd8c9981
287 changed files with 11712 additions and 7676 deletions
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81
src/PRCRev.cpp
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@@ -10,15 +10,19 @@
two series allpass units and two parallel comb
filters.
by Perry R. Cook and Gary P. Scavone, 1995 - 2007.
by Perry R. Cook and Gary P. Scavone, 1995 - 2009.
*/
/***************************************************/
#include "PRCRev.h"
#include <math.h>
#include <cmath>
PRCRev :: PRCRev(StkFloat T60)
namespace stk {
PRCRev :: PRCRev( StkFloat T60 )
{
lastFrame_.resize( 1, 2, 0.0 ); // resize lastFrame_ for stereo output
// Delay lengths for 44100 Hz sample rate.
int lengths[4]= {353, 1097, 1777, 2137};
double scaler = Stk::sampleRate() / 44100.0;
@@ -34,7 +38,7 @@ PRCRev :: PRCRev(StkFloat T60)
}
}
for (i=0; i<2; i++) {
for ( i=0; i<2; i++ ) {
allpassDelays_[i].setMaximumDelay( lengths[i] );
allpassDelays_[i].setDelay( lengths[i] );
@@ -48,18 +52,14 @@ PRCRev :: PRCRev(StkFloat T60)
this->clear();
}
PRCRev :: ~PRCRev()
{
}
void PRCRev :: clear()
void PRCRev :: clear( void )
{
allpassDelays_[0].clear();
allpassDelays_[1].clear();
combDelays_[0].clear();
combDelays_[1].clear();
lastOutput_[0] = 0.0;
lastOutput_[1] = 0.0;
lastFrame_[0] = 0.0;
lastFrame_[1] = 0.0;
}
void PRCRev :: setT60( StkFloat T60 )
@@ -68,31 +68,44 @@ void PRCRev :: setT60( StkFloat T60 )
combCoefficient_[1] = pow(10.0, (-3.0 * combDelays_[1].getDelay() / (T60 * Stk::sampleRate())));
}
StkFloat PRCRev :: computeSample(StkFloat input)
StkFrames& PRCRev :: tick( StkFrames& frames, unsigned int channel )
{
StkFloat temp, temp0, temp1, temp2, temp3;
#if defined(_STK_DEBUG_)
if ( channel >= frames.channels() - 1 ) {
errorString_ << "PRCRev::tick(): channel and StkFrames arguments are incompatible!";
handleError( StkError::FUNCTION_ARGUMENT );
}
#endif
temp = allpassDelays_[0].lastOut();
temp0 = allpassCoefficient_ * temp;
temp0 += input;
allpassDelays_[0].tick(temp0);
temp0 = -(allpassCoefficient_ * temp0) + temp;
temp = allpassDelays_[1].lastOut();
temp1 = allpassCoefficient_ * temp;
temp1 += temp0;
allpassDelays_[1].tick(temp1);
temp1 = -(allpassCoefficient_ * temp1) + temp;
temp2 = temp1 + (combCoefficient_[0] * combDelays_[0].lastOut());
temp3 = temp1 + (combCoefficient_[1] * combDelays_[1].lastOut());
StkFloat *samples = &frames[channel];
unsigned int hop = frames.channels();
for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
*samples = tick( *samples );
*samples++;
*samples = lastFrame_[1];
}
lastOutput_[0] = effectMix_ * (combDelays_[0].tick(temp2));
lastOutput_[1] = effectMix_ * (combDelays_[1].tick(temp3));
temp = (1.0 - effectMix_) * input;
lastOutput_[0] += temp;
lastOutput_[1] += temp;
return Effect::lastOut();
return frames;
}
StkFrames& PRCRev :: tick( StkFrames& iFrames, StkFrames& oFrames, unsigned int iChannel, unsigned int oChannel )
{
#if defined(_STK_DEBUG_)
if ( iChannel >= iFrames.channels() || oChannel >= oFrames.channels() - 1 ) {
errorString_ << "PRCRev::tick(): channel and StkFrames arguments are incompatible!";
handleError( StkError::FUNCTION_ARGUMENT );
}
#endif
StkFloat *iSamples = &iFrames[iChannel];
StkFloat *oSamples = &oFrames[oChannel];
unsigned int iHop = iFrames.channels(), oHop = oFrames.channels();
for ( unsigned int i=0; i<iFrames.frames(); i++, iSamples += iHop, oSamples += oHop ) {
*oSamples++ = tick( *iSamples );
*oSamples = lastFrame_[1];
}
return iFrames;
}
} // stk namespace