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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
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