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128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
#ifndef STK_WHISTLE_H
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#define STK_WHISTLE_H
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#include "Instrmnt.h"
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#include "Sphere.h"
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#include "Vector3D.h"
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#include "Noise.h"
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#include "SineWave.h"
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#include "OnePole.h"
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#include "Envelope.h"
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namespace stk {
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/***************************************************/
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/*! \class Whistle
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\brief STK police/referee whistle instrument class.
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This class implements a hybrid physical/spectral
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model of a police whistle (a la Cook).
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Control Change Numbers:
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- Noise Gain = 4
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- Fipple Modulation Frequency = 11
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- Fipple Modulation Gain = 1
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- Blowing Frequency Modulation = 2
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- Volume = 128
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by Perry R. Cook 1995-2012.
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*/
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/***************************************************/
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class Whistle : public Instrmnt
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{
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public:
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//! Class constructor.
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/*!
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An StkError will be thrown if the rawwave path is incorrectly set.
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*/
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Whistle( void );
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//! Class destructor.
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~Whistle( void );
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//! Reset and clear all internal state.
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void clear( void );
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//! Set instrument parameters for a particular frequency.
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void setFrequency( StkFloat frequency );
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//! Apply breath velocity to instrument with given amplitude and rate of increase.
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void startBlowing( StkFloat amplitude, StkFloat rate );
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//! Decrease breath velocity with given rate of decrease.
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void stopBlowing( StkFloat rate );
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//! Start a note with the given frequency and amplitude.
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void noteOn( StkFloat frequency, StkFloat amplitude );
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//! Stop a note with the given amplitude (speed of decay).
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void noteOff( StkFloat amplitude );
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//! Perform the control change specified by \e number and \e value (0.0 - 128.0).
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void controlChange( int number, StkFloat value );
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//! Compute and return one output sample.
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StkFloat tick( unsigned int channel = 0 );
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//! Fill a channel of the StkFrames object with computed outputs.
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/*!
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The \c channel argument must be less than the number of
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channels in the StkFrames argument (the first channel is specified
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by 0). However, range checking is only performed if _STK_DEBUG_
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is defined during compilation, in which case an out-of-range value
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will trigger an StkError exception.
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*/
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StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
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protected:
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Vector3D *tempVectorP_;
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Vector3D tempVector_;
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OnePole onepole_;
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Noise noise_;
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Envelope envelope_;
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Sphere can_; // Declare a Spherical "can".
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Sphere pea_, bumper_; // One spherical "pea", and a spherical "bumper".
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SineWave sine_;
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StkFloat baseFrequency_;
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StkFloat noiseGain_;
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StkFloat fippleFreqMod_;
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StkFloat fippleGainMod_;
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StkFloat blowFreqMod_;
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StkFloat tickSize_;
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StkFloat canLoss_;
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int subSample_, subSampCount_;
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};
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inline StkFrames& Whistle :: tick( StkFrames& frames, unsigned int channel )
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{
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unsigned int nChannels = lastFrame_.channels();
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#if defined(_STK_DEBUG_)
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if ( channel > frames.channels() - nChannels ) {
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oStream_ << "Whistle::tick(): channel and StkFrames arguments are incompatible!";
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handleError( StkError::FUNCTION_ARGUMENT );
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}
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#endif
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StkFloat *samples = &frames[channel];
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unsigned int j, hop = frames.channels() - nChannels;
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if ( nChannels == 1 ) {
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for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
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*samples++ = tick();
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}
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else {
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for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
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*samples++ = tick();
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for ( j=1; j<nChannels; j++ )
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*samples++ = lastFrame_[j];
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}
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}
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return frames;
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}
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} // stk namespace
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#endif
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