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Resonate.h

00001 #ifndef STK_RESONATE_H
00002 #define STK_RESONATE_H
00003 
00004 #include "Instrmnt.h"
00005 #include "ADSR.h"
00006 #include "BiQuad.h"
00007 #include "Noise.h"
00008 
00009 namespace stk {
00010 
00011 /***************************************************/
00028 /***************************************************/
00029 
00030 class Resonate : public Instrmnt
00031 {
00032  public:
00034   Resonate( void );
00035 
00037   ~Resonate( void );
00038 
00040   void clear( void );
00041 
00043   void setResonance( StkFloat frequency, StkFloat radius );
00044 
00046   void setNotch( StkFloat frequency, StkFloat radius );
00047 
00049   void setEqualGainZeroes( void ) { filter_.setEqualGainZeroes(); };
00050 
00052   void keyOn( void ) { adsr_.keyOn(); };
00053 
00055   void keyOff( void ) { adsr_.keyOff(); };
00056 
00058   void noteOn( StkFloat frequency, StkFloat amplitude );
00059 
00061   void noteOff( StkFloat amplitude );
00062 
00064   void controlChange( int number, StkFloat value );
00065 
00067   StkFloat tick( unsigned int channel = 0 );
00068 
00070 
00077   StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
00078 
00079  protected:
00080 
00081   ADSR     adsr_;
00082   BiQuad   filter_;
00083   Noise    noise_;
00084   StkFloat poleFrequency_;
00085   StkFloat poleRadius_;
00086   StkFloat zeroFrequency_;
00087   StkFloat zeroRadius_;
00088 
00089 };
00090 
00091 inline StkFloat Resonate :: tick( unsigned int )
00092 {
00093   lastFrame_[0] = filter_.tick( noise_.tick() );
00094   lastFrame_[0] *= adsr_.tick();
00095   return lastFrame_[0];
00096 }
00097 
00098 inline StkFrames& Resonate :: 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_ << "Resonate::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

The Synthesis ToolKit in C++ (STK)
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