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PercFlut.h

00001 #ifndef STK_PERCFLUT_H
00002 #define STK_PERCFLUT_H
00003 
00004 #include "FM.h"
00005 
00006 namespace stk {
00007 
00008 /***************************************************/
00034 /***************************************************/
00035 
00036 class PercFlut : public FM
00037 {
00038  public:
00040 
00043   PercFlut( void );
00044 
00046   ~PercFlut( void );
00047 
00049   void setFrequency( StkFloat frequency );
00050 
00052   void noteOn( StkFloat frequency, StkFloat amplitude );
00053 
00055   StkFloat tick( unsigned int channel = 0 );
00056 
00058 
00065   StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
00066 
00067  protected:
00068 
00069 };
00070 
00071 inline StkFloat PercFlut :: tick( unsigned int )
00072 {
00073   register StkFloat temp;
00074 
00075   temp = vibrato_.tick() * modDepth_ * 0.2;    
00076   waves_[0]->setFrequency(baseFrequency_ * (1.0 + temp) * ratios_[0]);
00077   waves_[1]->setFrequency(baseFrequency_ * (1.0 + temp) * ratios_[1]);
00078   waves_[2]->setFrequency(baseFrequency_ * (1.0 + temp) * ratios_[2]);
00079   waves_[3]->setFrequency(baseFrequency_ * (1.0 + temp) * ratios_[3]);
00080     
00081   waves_[3]->addPhaseOffset( twozero_.lastOut() );
00082   temp = gains_[3] * adsr_[3]->tick() * waves_[3]->tick();
00083 
00084   twozero_.tick(temp);
00085   waves_[2]->addPhaseOffset( temp );
00086   temp = (1.0 - (control2_ * 0.5)) * gains_[2] * adsr_[2]->tick() * waves_[2]->tick();
00087 
00088   temp += control2_ * 0.5 * gains_[1] * adsr_[1]->tick() * waves_[1]->tick();
00089   temp = temp * control1_;
00090 
00091   waves_[0]->addPhaseOffset(temp);
00092   temp = gains_[0] * adsr_[0]->tick() * waves_[0]->tick();
00093     
00094   lastFrame_[0] = temp * 0.5;
00095   return lastFrame_[0];
00096 }
00097 
00098 inline StkFrames& PercFlut :: tick( StkFrames& frames, unsigned int channel )
00099 {
00100   unsigned int nChannels = lastFrame_.channels();
00101 #if defined(_STK_DEBUG_)
00102   if ( channel > frames.channels() - nChannels ) {
00103     oStream_ << "PercFlut::tick(): channel and StkFrames arguments are incompatible!";
00104     handleError( StkError::FUNCTION_ARGUMENT );
00105   }
00106 #endif
00107 
00108   StkFloat *samples = &frames[channel];
00109   unsigned int j, hop = frames.channels() - nChannels;
00110   if ( nChannels == 1 ) {
00111     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
00112       *samples++ = tick();
00113   }
00114   else {
00115     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
00116       *samples++ = tick();
00117       for ( j=1; j<nChannels; j++ )
00118         *samples++ = lastFrame_[j];
00119     }
00120   }
00121 
00122   return frames;
00123 }
00124 
00125 } // stk namespace
00126 
00127 #endif

The Synthesis ToolKit in C++ (STK)
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