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FMVoices.h

00001 #ifndef STK_FMVOICES_H
00002 #define STK_FMVOICES_H
00003 
00004 #include "FM.h"
00005 
00006 namespace stk {
00007 
00008 /***************************************************/
00038 /***************************************************/
00039 
00040 class FMVoices : public FM
00041 {
00042  public:
00044 
00047   FMVoices( void );
00048 
00050   ~FMVoices( void );
00051 
00053   void setFrequency( StkFloat frequency );
00054 
00056   void noteOn( StkFloat frequency, StkFloat amplitude );
00057 
00059   void controlChange( int number, StkFloat value );
00060 
00062   StkFloat tick( unsigned int channel = 0 );
00063 
00065 
00072   StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
00073 
00074  protected:
00075 
00076   int currentVowel_;
00077   StkFloat tilt_[3];
00078   StkFloat mods_[3];
00079 };
00080 
00081 inline StkFloat FMVoices :: tick( unsigned int )
00082 {
00083   register StkFloat temp, temp2;
00084 
00085   temp = gains_[3] * adsr_[3]->tick() * waves_[3]->tick();
00086   temp2 = vibrato_.tick() * modDepth_ * 0.1;
00087 
00088   waves_[0]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[0]);
00089   waves_[1]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[1]);
00090   waves_[2]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[2]);
00091   waves_[3]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[3]);
00092 
00093   waves_[0]->addPhaseOffset(temp * mods_[0]);
00094   waves_[1]->addPhaseOffset(temp * mods_[1]);
00095   waves_[2]->addPhaseOffset(temp * mods_[2]);
00096   waves_[3]->addPhaseOffset( twozero_.lastOut() );
00097   twozero_.tick( temp );
00098   temp =  gains_[0] * tilt_[0] * adsr_[0]->tick() * waves_[0]->tick();
00099   temp += gains_[1] * tilt_[1] * adsr_[1]->tick() * waves_[1]->tick();
00100   temp += gains_[2] * tilt_[2] * adsr_[2]->tick() * waves_[2]->tick();
00101 
00102   lastFrame_[0] = temp * 0.33;
00103   return lastFrame_[0];
00104 }
00105 
00106 inline StkFrames& FMVoices :: tick( StkFrames& frames, unsigned int channel )
00107 {
00108   unsigned int nChannels = lastFrame_.channels();
00109 #if defined(_STK_DEBUG_)
00110   if ( channel > frames.channels() - nChannels ) {
00111     oStream_ << "FMVoices::tick(): channel and StkFrames arguments are incompatible!";
00112     handleError( StkError::FUNCTION_ARGUMENT );
00113   }
00114 #endif
00115 
00116   StkFloat *samples = &frames[channel];
00117   unsigned int j, hop = frames.channels() - nChannels;
00118   if ( nChannels == 1 ) {
00119     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
00120       *samples++ = tick();
00121   }
00122   else {
00123     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
00124       *samples++ = tick();
00125       for ( j=1; j<nChannels; j++ )
00126         *samples++ = lastFrame_[j];
00127     }
00128   }
00129 
00130   return frames;
00131 }
00132 
00133 } // stk namespace
00134 
00135 #endif

The Synthesis ToolKit in C++ (STK)
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