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00001 #ifndef STK_SIMPLE_H 00002 #define STK_SIMPLE_H 00003 00004 #include "Instrmnt.h" 00005 #include "ADSR.h" 00006 #include "FileLoop.h" 00007 #include "OnePole.h" 00008 #include "BiQuad.h" 00009 #include "Noise.h" 00010 00011 namespace stk { 00012 00013 /***************************************************/ 00030 /***************************************************/ 00031 00032 class Simple : public Instrmnt 00033 { 00034 public: 00036 00039 Simple( void ); 00040 00042 ~Simple( void ); 00043 00045 void clear( void ); 00046 00048 void setFrequency( StkFloat frequency ); 00049 00051 void keyOn( void ); 00052 00054 void keyOff( void ); 00055 00057 void noteOn( StkFloat frequency, StkFloat amplitude ); 00058 00060 void noteOff( StkFloat amplitude ); 00061 00063 void controlChange( int number, StkFloat value ); 00064 00066 StkFloat tick( unsigned int channel = 0 ); 00067 00069 00076 StkFrames& tick( StkFrames& frames, unsigned int channel = 0 ); 00077 00078 protected: 00079 00080 ADSR adsr_; 00081 FileLoop *loop_; 00082 OnePole filter_; 00083 BiQuad biquad_; 00084 Noise noise_; 00085 StkFloat baseFrequency_; 00086 StkFloat loopGain_; 00087 00088 }; 00089 00090 inline StkFloat Simple :: tick( unsigned int ) 00091 { 00092 lastFrame_[0] = loopGain_ * loop_->tick(); 00093 biquad_.tick( noise_.tick() ); 00094 lastFrame_[0] += (1.0 - loopGain_) * biquad_.lastOut(); 00095 lastFrame_[0] = filter_.tick( lastFrame_[0] ); 00096 lastFrame_[0] *= adsr_.tick(); 00097 return lastFrame_[0]; 00098 } 00099 00100 inline StkFrames& Simple :: tick( StkFrames& frames, unsigned int channel ) 00101 { 00102 unsigned int nChannels = lastFrame_.channels(); 00103 #if defined(_STK_DEBUG_) 00104 if ( channel > frames.channels() - nChannels ) { 00105 oStream_ << "Simple::tick(): channel and StkFrames arguments are incompatible!"; 00106 handleError( StkError::FUNCTION_ARGUMENT ); 00107 } 00108 #endif 00109 00110 StkFloat *samples = &frames[channel]; 00111 unsigned int j, hop = frames.channels() - nChannels; 00112 if ( nChannels == 1 ) { 00113 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) 00114 *samples++ = tick(); 00115 } 00116 else { 00117 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) { 00118 *samples++ = tick(); 00119 for ( j=1; j<nChannels; j++ ) 00120 *samples++ = lastFrame_[j]; 00121 } 00122 } 00123 00124 return frames; 00125 } 00126 00127 } // stk namespace 00128 00129 #endif
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