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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
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