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TubeBell.h

00001 #ifndef STK_TUBEBELL_H
00002 #define STK_TUBEBELL_H
00003 
00004 #include "FM.h"
00005 
00006 namespace stk {
00007 
00008 /***************************************************/
00038 /***************************************************/
00039 
00040 class TubeBell : public FM
00041 {
00042  public:
00044 
00047   TubeBell( void );
00048 
00050   ~TubeBell( void );
00051 
00053   void noteOn( StkFloat frequency, StkFloat amplitude );
00054 
00056   StkFloat tick( unsigned int channel = 0 );
00057 
00059 
00066   StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
00067 
00068  protected:
00069 
00070 };
00071 
00072 inline StkFloat TubeBell :: tick( unsigned int )
00073 {
00074   StkFloat temp, temp2;
00075 
00076   temp = gains_[1] * adsr_[1]->tick() * waves_[1]->tick();
00077   temp = temp * control1_;
00078 
00079   waves_[0]->addPhaseOffset( temp );
00080   waves_[3]->addPhaseOffset( twozero_.lastOut() );
00081   temp = gains_[3] * adsr_[3]->tick() * waves_[3]->tick();
00082   twozero_.tick( temp );
00083 
00084   waves_[2]->addPhaseOffset( temp );
00085   temp = ( 1.0 - (control2_ * 0.5)) * gains_[0] * adsr_[0]->tick() * waves_[0]->tick();
00086   temp += control2_ * 0.5 * gains_[2] * adsr_[2]->tick() * waves_[2]->tick();
00087 
00088   // Calculate amplitude modulation and apply it to output.
00089   temp2 = vibrato_.tick() * modDepth_;
00090   temp = temp * (1.0 + temp2);
00091     
00092   lastFrame_[0] = temp * 0.5;
00093   return lastFrame_[0];
00094 }
00095 
00096 inline StkFrames& TubeBell :: tick( StkFrames& frames, unsigned int channel )
00097 {
00098   unsigned int nChannels = lastFrame_.channels();
00099 #if defined(_STK_DEBUG_)
00100   if ( channel > frames.channels() - nChannels ) {
00101     oStream_ << "TubeBell::tick(): channel and StkFrames arguments are incompatible!";
00102     handleError( StkError::FUNCTION_ARGUMENT );
00103   }
00104 #endif
00105 
00106   StkFloat *samples = &frames[channel];
00107   unsigned int j, hop = frames.channels() - nChannels;
00108   if ( nChannels == 1 ) {
00109     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
00110       *samples++ = tick();
00111   }
00112   else {
00113     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
00114       *samples++ = tick();
00115       for ( j=1; j<nChannels; j++ )
00116         *samples++ = lastFrame_[j];
00117     }
00118   }
00119 
00120   return frames;
00121 }
00122 
00123 } // stk namespace
00124 
00125 #endif

The Synthesis ToolKit in C++ (STK)
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