The Synthesis ToolKit in C++ (STK)

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# Modal.h

    00001 #ifndef STK_MODAL_H
    00002 #define STK_MODAL_H
    00003
    00004 #include "Instrmnt.h"
    00005 #include "Envelope.h"
    00006 #include "FileLoop.h"
    00007 #include "SineWave.h"
    00008 #include "BiQuad.h"
    00009 #include "OnePole.h"
    00010
    00011 namespace stk {
    00012
    00013 /***************************************************/
    00024 /***************************************************/
    00025
    00026 class Modal : public Instrmnt
    00027 {
    00028 public:
    00030
    00033   Modal( unsigned int modes = 4 );
    00034
    00036   virtual ~Modal( void );
    00037
    00039   void clear( void );
    00040
    00042   virtual void setFrequency( StkFloat frequency );
    00043
    00045   void setRatioAndRadius( unsigned int modeIndex, StkFloat ratio, StkFloat radius );
    00046
    00048   void setMasterGain( StkFloat aGain ) { masterGain_ = aGain; };
    00049
    00051   void setDirectGain( StkFloat aGain ) { directGain_ = aGain; };
    00052
    00054   void setModeGain( unsigned int modeIndex, StkFloat gain );
    00055
    00057   virtual void strike( StkFloat amplitude );
    00058
    00060   void damp( StkFloat amplitude );
    00061
    00063   void noteOn( StkFloat frequency, StkFloat amplitude );
    00064
    00066   void noteOff( StkFloat amplitude );
    00067
    00069   virtual void controlChange( int number, StkFloat value ) = 0;
    00070
    00072   StkFloat tick( unsigned int channel = 0 );
    00073
    00075
    00082   StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
    00083
    00084 protected:
    00085
    00086   Envelope envelope_;
    00087   FileWvIn *wave_;
    00088   BiQuad **filters_;
    00089   OnePole  onepole_;
    00090   SineWave vibrato_;
    00091
    00092   unsigned int nModes_;
    00093   std::vector<StkFloat> ratios_;
    00094   std::vector<StkFloat> radii_;
    00095
    00096   StkFloat vibratoGain_;
    00097   StkFloat masterGain_;
    00098   StkFloat directGain_;
    00099   StkFloat stickHardness_;
    00100   StkFloat strikePosition_;
    00101   StkFloat baseFrequency_;
    00102 };
    00103
    00104 inline StkFloat Modal :: tick( unsigned int )
    00105 {
    00106   StkFloat temp = masterGain_ * onepole_.tick( wave_->tick() * envelope_.tick() );
    00107
    00108   StkFloat temp2 = 0.0;
    00109   for ( unsigned int i=0; i<nModes_; i++ )
    00110     temp2 += filters_[i]->tick(temp);
    00111
    00112   temp2  -= temp2 * directGain_;
    00113   temp2 += directGain_ * temp;
    00114
    00115   if ( vibratoGain_ != 0.0 ) {
    00116     // Calculate AM and apply to master out
    00117     temp = 1.0 + ( vibrato_.tick() * vibratoGain_ );
    00118     temp2 = temp * temp2;
    00119   }
    00120
    00121   lastFrame_[0] = temp2;
    00122   return lastFrame_[0];
    00123 }
    00124
    00125 inline StkFrames& Modal :: tick( StkFrames& frames, unsigned int channel )
    00126 {
    00127   unsigned int nChannels = lastFrame_.channels();
    00128 #if defined(_STK_DEBUG_)
    00129   if ( channel > frames.channels() - nChannels ) {
    00130     oStream_ << "Modal::tick(): channel and StkFrames arguments are incompatible!";
    00131     handleError( StkError::FUNCTION_ARGUMENT );
    00132   }
    00133 #endif
    00134
    00135   StkFloat *samples = &frames[channel];
    00136   unsigned int j, hop = frames.channels() - nChannels;
    00137   if ( nChannels == 1 ) {
    00138     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
    00139       *samples++ = tick();
    00140   }
    00141   else {
    00142     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
    00143       *samples++ = tick();
    00144       for ( j=1; j<nChannels; j++ )
    00145         *samples++ = lastFrame_[j];
    00146     }
    00147   }
    00148
    00149   return frames;
    00150 }
    00151
    00152 } // stk namespace
    00153
    00154 #endif

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