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Rhodey.h

00001 #ifndef STK_RHODEY_H
00002 #define STK_RHODEY_H
00003 
00004 #include "FM.h"
00005 
00006 namespace stk {
00007 
00008 /***************************************************/
00038 /***************************************************/
00039 
00040 class Rhodey : public FM
00041 {
00042  public:
00044 
00047   Rhodey( void );
00048 
00050   ~Rhodey( void );
00051 
00053   void setFrequency( StkFloat frequency );
00054 
00056   void noteOn( StkFloat frequency, StkFloat amplitude );
00057 
00059   StkFloat tick( unsigned int channel = 0 );
00060 
00062 
00069   StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
00070 
00071  protected:
00072 
00073 };
00074 
00075 inline StkFloat Rhodey :: tick( unsigned int )
00076 {
00077   StkFloat temp, temp2;
00078 
00079   temp = gains_[1] * adsr_[1]->tick() * waves_[1]->tick();
00080   temp = temp * control1_;
00081 
00082   waves_[0]->addPhaseOffset( temp );
00083   waves_[3]->addPhaseOffset( twozero_.lastOut() );
00084   temp = gains_[3] * adsr_[3]->tick() * waves_[3]->tick();
00085   twozero_.tick(temp);
00086 
00087   waves_[2]->addPhaseOffset( temp );
00088   temp = ( 1.0 - (control2_ * 0.5)) * gains_[0] * adsr_[0]->tick() * waves_[0]->tick();
00089   temp += control2_ * 0.5 * gains_[2] * adsr_[2]->tick() * waves_[2]->tick();
00090 
00091   // Calculate amplitude modulation and apply it to output.
00092   temp2 = vibrato_.tick() * modDepth_;
00093   temp = temp * (1.0 + temp2);
00094     
00095   lastFrame_[0] = temp * 0.5;
00096   return lastFrame_[0];
00097 }
00098 
00099 inline StkFrames& Rhodey :: tick( StkFrames& frames, unsigned int channel )
00100 {
00101   unsigned int nChannels = lastFrame_.channels();
00102 #if defined(_STK_DEBUG_)
00103   if ( channel > frames.channels() - nChannels ) {
00104     oStream_ << "Rhodey::tick(): channel and StkFrames arguments are incompatible!";
00105     handleError( StkError::FUNCTION_ARGUMENT );
00106   }
00107 #endif
00108 
00109   StkFloat *samples = &frames[channel];
00110   unsigned int j, hop = frames.channels() - nChannels;
00111   if ( nChannels == 1 ) {
00112     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
00113       *samples++ = tick();
00114   }
00115   else {
00116     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
00117       *samples++ = tick();
00118       for ( j=1; j<nChannels; j++ )
00119         *samples++ = lastFrame_[j];
00120     }
00121   }
00122 
00123   return frames;
00124 }
00125 
00126 } // stk namespace
00127 
00128 #endif

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