Plucked.h

#ifndef STK_PLUCKED_H
#define STK_PLUCKED_H
 
#include "Instrmnt.h"
#include "DelayA.h"
#include "OneZero.h"
#include "OnePole.h"
#include "Noise.h"
 
namespace stk {
 
/***************************************************/
/***************************************************/
 
class Plucked : public Instrmnt
{
 public:
  Plucked( StkFloat lowestFrequency = 10.0 );
 
  ~Plucked( void );
 
  void clear( void );
 
  void setFrequency( StkFloat frequency );
 
  void pluck( StkFloat amplitude );
 
  void noteOn( StkFloat frequency, StkFloat amplitude );
 
  void noteOff( StkFloat amplitude );
 
  StkFloat tick( unsigned int channel = 0 );
 
 
  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
 
 protected:  
 
  DelayA   delayLine_;
  OneZero  loopFilter_;
  OnePole  pickFilter_;
  Noise    noise_;
 
  StkFloat loopGain_;
};
 
inline StkFloat Plucked :: tick( unsigned int )
{
  // Here's the whole inner loop of the instrument!!
  return lastFrame_[0] = 3.0 * delayLine_.tick( loopFilter_.tick( delayLine_.lastOut() * loopGain_ ) ); 
}
 
inline StkFrames& Plucked :: tick( StkFrames& frames, unsigned int channel )
{
  unsigned int nChannels = lastFrame_.channels();
#if defined(_STK_DEBUG_)
  if ( channel > frames.channels() - nChannels ) {
    oStream_ << "Plucked::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