JCRev.h

#ifndef STK_JCREV_H
#define STK_JCREV_H
 
#include "Effect.h"
#include "Delay.h"
#include "OnePole.h"
 
namespace stk {
 
/***************************************************/
/***************************************************/
 
class JCRev : public Effect
{
 public:
  JCRev( StkFloat T60 = 1.0 );
 
  void clear( void );
 
  void setT60( StkFloat T60 );
 
 
  StkFloat lastOut( unsigned int channel = 0 );
 
 
  StkFloat tick( StkFloat input, unsigned int channel = 0 );
 
 
  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
 
 
  StkFrames& tick( StkFrames& iFrames, StkFrames &oFrames, unsigned int iChannel = 0, unsigned int oChannel = 0 );
 
 protected:
 
  Delay allpassDelays_[3];
  Delay combDelays_[4];
  OnePole combFilters_[4];
  Delay outLeftDelay_;
  Delay outRightDelay_;
  StkFloat allpassCoefficient_;
  StkFloat combCoefficient_[4];
 
};
 
inline StkFloat JCRev :: lastOut( unsigned int channel )
{
#if defined(_STK_DEBUG_)
  if ( channel > 1 ) {
    oStream_ << "JCRev::lastOut(): channel argument must be less than 2!";
    handleError( StkError::FUNCTION_ARGUMENT );
  }
#endif
 
  return lastFrame_[channel];
}
 
inline StkFloat JCRev :: tick( StkFloat input, unsigned int channel )
{
#if defined(_STK_DEBUG_)
  if ( channel > 1 ) {
    oStream_ << "JCRev::tick(): channel argument must be less than 2!";
    handleError( StkError::FUNCTION_ARGUMENT );
  }
#endif
 
  StkFloat temp, temp0, temp1, temp2, temp3, temp4, temp5, temp6;
  StkFloat filtout;
 
  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;
    
  temp = allpassDelays_[2].lastOut();
  temp2 = allpassCoefficient_ * temp;
  temp2 += temp1;
  allpassDelays_[2].tick(temp2);
  temp2 = -(allpassCoefficient_ * temp2) + temp;
    
  temp3 = temp2 + ( combFilters_[0].tick( combCoefficient_[0] * combDelays_[0].lastOut() ) );
  temp4 = temp2 + ( combFilters_[1].tick( combCoefficient_[1] * combDelays_[1].lastOut() ) );
  temp5 = temp2 + ( combFilters_[2].tick( combCoefficient_[2] * combDelays_[2].lastOut() ) );
  temp6 = temp2 + ( combFilters_[3].tick( combCoefficient_[3] * combDelays_[3].lastOut() ) );
 
  combDelays_[0].tick(temp3);
  combDelays_[1].tick(temp4);
  combDelays_[2].tick(temp5);
  combDelays_[3].tick(temp6);
 
  filtout = temp3 + temp4 + temp5 + temp6;
 
  lastFrame_[0] = effectMix_ * (outLeftDelay_.tick(filtout));
  lastFrame_[1] = effectMix_ * (outRightDelay_.tick(filtout));
  temp = (1.0 - effectMix_) * input;
  lastFrame_[0] += temp;
  lastFrame_[1] += temp;
    
  return 0.7 * lastFrame_[channel];
}
 
} // stk namespace
 
#endif