Simple.h

#ifndef STK_SIMPLE_H
#define STK_SIMPLE_H
 
#include "Instrmnt.h"
#include "ADSR.h"
#include "FileLoop.h"
#include "OnePole.h"
#include "BiQuad.h"
#include "Noise.h"
 
namespace stk {
 
/***************************************************/
/***************************************************/
 
class Simple : public Instrmnt
{
 public:
 
  Simple( void );
 
  ~Simple( void );
 
  void setFrequency( StkFloat frequency );
 
  void keyOn( void );
 
  void keyOff( void );
 
  void noteOn( StkFloat frequency, StkFloat amplitude );
 
  void noteOff( StkFloat amplitude );
 
  void controlChange( int number, StkFloat value );
 
  StkFloat tick( unsigned int channel = 0 );
 
 
  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
 
 protected:
 
  ADSR      adsr_; 
  FileLoop *loop_;
  OnePole   filter_;
  BiQuad    biquad_;
  Noise     noise_;
  StkFloat  baseFrequency_;
  StkFloat  loopGain_;
 
};
 
inline StkFloat Simple :: tick( unsigned int )
{
  lastFrame_[0] = loopGain_ * loop_->tick();
  biquad_.tick( noise_.tick() );
  lastFrame_[0] += (1.0 - loopGain_) * biquad_.lastOut();
  lastFrame_[0] = filter_.tick( lastFrame_[0] );
  lastFrame_[0] *= adsr_.tick();
  return lastFrame_[0];
}
 
inline StkFrames& Simple :: tick( StkFrames& frames, unsigned int channel )
{
  unsigned int nChannels = lastFrame_.channels();
#if defined(_STK_DEBUG_)
  if ( channel > frames.channels() - nChannels ) {
    oStream_ << "Simple::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