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# Simple.h

    00001 #ifndef STK_SIMPLE_H
    00002 #define STK_SIMPLE_H
    00003
    00004 #include "Instrmnt.h"
    00005 #include "ADSR.h"
    00006 #include "FileLoop.h"
    00007 #include "OnePole.h"
    00008 #include "BiQuad.h"
    00009 #include "Noise.h"
    00010
    00011 namespace stk {
    00012
    00013 /***************************************************/
    00030 /***************************************************/
    00031
    00032 class Simple : public Instrmnt
    00033 {
    00034  public:
    00036
    00039   Simple( void );
    00040
    00042   ~Simple( void );
    00043
    00045   void clear( void );
    00046
    00048   void setFrequency( StkFloat frequency );
    00049
    00051   void keyOn( void );
    00052
    00054   void keyOff( void );
    00055
    00057   void noteOn( StkFloat frequency, StkFloat amplitude );
    00058
    00060   void noteOff( StkFloat amplitude );
    00061
    00063   void controlChange( int number, StkFloat value );
    00064
    00066   StkFloat tick( unsigned int channel = 0 );
    00067
    00069
    00076   StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
    00077
    00078  protected:
    00079
    00080   ADSR      adsr_;
    00081   FileLoop *loop_;
    00082   OnePole   filter_;
    00083   BiQuad    biquad_;
    00084   Noise     noise_;
    00085   StkFloat  baseFrequency_;
    00086   StkFloat  loopGain_;
    00087
    00088 };
    00089
    00090 inline StkFloat Simple :: tick( unsigned int )
    00091 {
    00092   lastFrame_[0] = loopGain_ * loop_->tick();
    00093   biquad_.tick( noise_.tick() );
    00094   lastFrame_[0] += (1.0 - loopGain_) * biquad_.lastOut();
    00095   lastFrame_[0] = filter_.tick( lastFrame_[0] );
    00096   lastFrame_[0] *= adsr_.tick();
    00097   return lastFrame_[0];
    00098 }
    00099
    00100 inline StkFrames& Simple :: tick( StkFrames& frames, unsigned int channel )
    00101 {
    00102   unsigned int nChannels = lastFrame_.channels();
    00103 #if defined(_STK_DEBUG_)
    00104   if ( channel > frames.channels() - nChannels ) {
    00105     oStream_ << "Simple::tick(): channel and StkFrames arguments are incompatible!";
    00106     handleError( StkError::FUNCTION_ARGUMENT );
    00107   }
    00108 #endif
    00109
    00110   StkFloat *samples = &frames[channel];
    00111   unsigned int j, hop = frames.channels() - nChannels;
    00112   if ( nChannels == 1 ) {
    00113     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
    00114       *samples++ = tick();
    00115   }
    00116   else {
    00117     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
    00118       *samples++ = tick();
    00119       for ( j=1; j<nChannels; j++ )
    00120         *samples++ = lastFrame_[j];
    00121     }
    00122   }
    00123
    00124   return frames;
    00125 }
    00126
    00127 } // stk namespace
    00128
    00129 #endif

The Synthesis ToolKit in C++ (STK)
©1995-2012 Perry R. Cook and Gary P. Scavone. All Rights Reserved.