FMVoices.h

#ifndef STK_FMVOICES_H
#define STK_FMVOICES_H
 
#include "FM.h"
 
namespace stk {
 
/***************************************************/
/***************************************************/
 
class FMVoices : public FM
{
 public:
 
  FMVoices( void );
 
  ~FMVoices( void );
 
  void setFrequency( StkFloat frequency );
 
  void noteOn( StkFloat frequency, StkFloat amplitude );
 
  void controlChange( int number, StkFloat value );
 
  StkFloat tick( unsigned int channel = 0 );
 
 
  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
 
 protected:
 
  int currentVowel_;
  StkFloat tilt_[3];
  StkFloat mods_[3];
};
 
inline StkFloat FMVoices :: tick( unsigned int )
{
  StkFloat temp, temp2;
 
  temp = gains_[3] * adsr_[3]->tick() * waves_[3]->tick();
  temp2 = vibrato_.tick() * modDepth_ * 0.1;
 
  waves_[0]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[0]);
  waves_[1]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[1]);
  waves_[2]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[2]);
  waves_[3]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[3]);
 
  waves_[0]->addPhaseOffset(temp * mods_[0]);
  waves_[1]->addPhaseOffset(temp * mods_[1]);
  waves_[2]->addPhaseOffset(temp * mods_[2]);
  waves_[3]->addPhaseOffset( twozero_.lastOut() );
  twozero_.tick( temp );
  temp =  gains_[0] * tilt_[0] * adsr_[0]->tick() * waves_[0]->tick();
  temp += gains_[1] * tilt_[1] * adsr_[1]->tick() * waves_[1]->tick();
  temp += gains_[2] * tilt_[2] * adsr_[2]->tick() * waves_[2]->tick();
 
  lastFrame_[0] = temp * 0.33;
  return lastFrame_[0];
}
 
inline StkFrames& FMVoices :: tick( StkFrames& frames, unsigned int channel )
{
  unsigned int nChannels = lastFrame_.channels();
#if defined(_STK_DEBUG_)
  if ( channel > frames.channels() - nChannels ) {
    oStream_ << "FMVoices::tick(): channel and StkFrames arguments are incompatible!";
    handleError( StkError::FUNCTION_ARGUMENT );
  }
#endif
 
  StkFloat *samples = &frames[channel];
  unsigned int j, hop = frames.channels() - nChannels;
  if ( nChannels == 1 ) {
    for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
      *samples++ = tick();
  }
  else {
    for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
      *samples++ = tick();
      for ( j=1; j<nChannels; j++ )
        *samples++ = lastFrame_[j];
    }
  }
 
  return frames;
}
 
} // stk namespace
 
#endif