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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
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