The Synthesis ToolKit in C++ (STK)

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# BlowBotl.h

    00001 #ifndef STK_BLOWBOTL_H
    00002 #define STK_BLOWBOTL_H
    00003
    00004 #include "Instrmnt.h"
    00005 #include "JetTable.h"
    00006 #include "BiQuad.h"
    00007 #include "PoleZero.h"
    00008 #include "Noise.h"
    00009 #include "ADSR.h"
    00010 #include "SineWave.h"
    00011
    00012 namespace stk {
    00013
    00014 /***************************************************/
    00030 /***************************************************/
    00031
    00032 class BlowBotl : public Instrmnt
    00033 {
    00034  public:
    00036
    00039   BlowBotl( void );
    00040
    00042   ~BlowBotl( void );
    00043
    00045   void clear( void );
    00046
    00048   void setFrequency( StkFloat frequency );
    00049
    00051   void startBlowing( StkFloat amplitude, StkFloat rate );
    00052
    00054   void stopBlowing( StkFloat rate );
    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   JetTable jetTable_;
    00081   BiQuad resonator_;
    00082   PoleZero dcBlock_;
    00083   Noise noise_;
    00084   ADSR adsr_;
    00085   SineWave vibrato_;
    00086   StkFloat maxPressure_;
    00087   StkFloat noiseGain_;
    00088   StkFloat vibratoGain_;
    00089   StkFloat outputGain_;
    00090
    00091 };
    00092
    00093 inline StkFloat BlowBotl :: tick( unsigned int )
    00094 {
    00095   StkFloat breathPressure;
    00096   StkFloat randPressure;
    00097   StkFloat pressureDiff;
    00098
    00099   // Calculate the breath pressure (envelope + vibrato)
    00100   breathPressure = maxPressure_ * adsr_.tick();
    00101   breathPressure += vibratoGain_ * vibrato_.tick();
    00102
    00103   pressureDiff = breathPressure - resonator_.lastOut();
    00104
    00105   randPressure = noiseGain_ * noise_.tick();
    00106   randPressure *= breathPressure;
    00107   randPressure *= (1.0 + pressureDiff);
    00108
    00109   resonator_.tick( breathPressure + randPressure - ( jetTable_.tick( pressureDiff ) * pressureDiff ) );
    00110   lastFrame_[0] = 0.2 * outputGain_ * dcBlock_.tick( pressureDiff );
    00111
    00112   return lastFrame_[0];
    00113 }
    00114
    00115 inline StkFrames& BlowBotl :: tick( StkFrames& frames, unsigned int channel )
    00116 {
    00117   unsigned int nChannels = lastFrame_.channels();
    00118 #if defined(_STK_DEBUG_)
    00119   if ( channel > frames.channels() - nChannels ) {
    00120     oStream_ << "BlowBotl::tick(): channel and StkFrames arguments are incompatible!";
    00121     handleError( StkError::FUNCTION_ARGUMENT );
    00122   }
    00123 #endif
    00124
    00125   StkFloat *samples = &frames[channel];
    00126   unsigned int j, hop = frames.channels() - nChannels;
    00127   if ( nChannels == 1 ) {
    00128     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
    00129       *samples++ = tick();
    00130   }
    00131   else {
    00132     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
    00133       *samples++ = tick();
    00134       for ( j=1; j<nChannels; j++ )
    00135         *samples++ = lastFrame_[j];
    00136     }
    00137   }
    00138
    00139   return frames;
    00140 }
    00141
    00142 } // stk namespace
    00143
    00144 #endif

The Synthesis ToolKit in C++ (STK)
©1995-2012 Perry R. Cook and Gary P. Scavone. All Rights Reserved.