Moog.h

#ifndef STK_MOOG_H
#define STK_MOOG_H
 
#include "Sampler.h"
#include "FormSwep.h"
 
namespace stk {
 
/***************************************************/
/***************************************************/
 
class Moog : public Sampler
{
 public:
 
  Moog( void );
 
  ~Moog( void );
 
  void setFrequency( StkFloat frequency );
 
  void noteOn( StkFloat frequency, StkFloat amplitude );
 
  void setModulationSpeed( StkFloat mSpeed ) { loops_[1]->setFrequency( mSpeed ); };
 
  void setModulationDepth( StkFloat mDepth ) { modDepth_ = mDepth * 0.5; };
 
  void controlChange( int number, StkFloat value );
 
  StkFloat tick( unsigned int channel = 0 );
 
 
  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
 
 protected:
 
  FormSwep filters_[2];
  StkFloat modDepth_;
  StkFloat filterQ_;
  StkFloat filterRate_;
 
};
 
inline StkFloat Moog :: tick( unsigned int )
{
  StkFloat temp;
 
  if ( modDepth_ != 0.0 ) {
    temp = loops_[1]->tick() * modDepth_;    
    loops_[0]->setFrequency( baseFrequency_ * (1.0 + temp) );
  }
 
  temp = attackGain_ * attacks_[0]->tick();
  temp += loopGain_ * loops_[0]->tick();
  temp = filter_.tick( temp );
  temp *= adsr_.tick();
  temp = filters_[0].tick( temp );
  lastFrame_[0] = filters_[1].tick( temp );
  return lastFrame_[0] * 6.0;
}
 
inline StkFrames& Moog :: tick( StkFrames& frames, unsigned int channel )
{
  unsigned int nChannels = lastFrame_.channels();
#if defined(_STK_DEBUG_)
  if ( channel > frames.channels() - nChannels ) {
    oStream_ << "Moog::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