mirror of
https://github.com/HifiExperiments/overte.git
synced 2025-06-18 11:40:33 +02:00
144 lines
3.8 KiB
C++
144 lines
3.8 KiB
C++
#ifndef STK_BLOWBOTL_H
|
|
#define STK_BLOWBOTL_H
|
|
|
|
#include "Instrmnt.h"
|
|
#include "JetTable.h"
|
|
#include "BiQuad.h"
|
|
#include "PoleZero.h"
|
|
#include "Noise.h"
|
|
#include "ADSR.h"
|
|
#include "SineWave.h"
|
|
|
|
namespace stk {
|
|
|
|
/***************************************************/
|
|
/*! \class BlowBotl
|
|
\brief STK blown bottle instrument class.
|
|
|
|
This class implements a helmholtz resonator
|
|
(biquad filter) with a polynomial jet
|
|
excitation (a la Cook).
|
|
|
|
Control Change Numbers:
|
|
- Noise Gain = 4
|
|
- Vibrato Frequency = 11
|
|
- Vibrato Gain = 1
|
|
- Volume = 128
|
|
|
|
by Perry R. Cook and Gary P. Scavone, 1995-2012.
|
|
*/
|
|
/***************************************************/
|
|
|
|
class BlowBotl : public Instrmnt
|
|
{
|
|
public:
|
|
//! Class constructor.
|
|
/*!
|
|
An StkError will be thrown if the rawwave path is incorrectly set.
|
|
*/
|
|
BlowBotl( void );
|
|
|
|
//! Class destructor.
|
|
~BlowBotl( void );
|
|
|
|
//! Reset and clear all internal state.
|
|
void clear( void );
|
|
|
|
//! Set instrument parameters for a particular frequency.
|
|
void setFrequency( StkFloat frequency );
|
|
|
|
//! Apply breath velocity to instrument with given amplitude and rate of increase.
|
|
void startBlowing( StkFloat amplitude, StkFloat rate );
|
|
|
|
//! Decrease breath velocity with given rate of decrease.
|
|
void stopBlowing( StkFloat rate );
|
|
|
|
//! Start a note with the given frequency and amplitude.
|
|
void noteOn( StkFloat frequency, StkFloat amplitude );
|
|
|
|
//! Stop a note with the given amplitude (speed of decay).
|
|
void noteOff( StkFloat amplitude );
|
|
|
|
//! Perform the control change specified by \e number and \e value (0.0 - 128.0).
|
|
void controlChange( int number, StkFloat value );
|
|
|
|
//! Compute and return one output sample.
|
|
StkFloat tick( unsigned int channel = 0 );
|
|
|
|
//! Fill a channel of the StkFrames object with computed outputs.
|
|
/*!
|
|
The \c channel argument must be less than the number of
|
|
channels in the StkFrames argument (the first channel is specified
|
|
by 0). However, range checking is only performed if _STK_DEBUG_
|
|
is defined during compilation, in which case an out-of-range value
|
|
will trigger an StkError exception.
|
|
*/
|
|
StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
|
|
|
|
protected:
|
|
|
|
JetTable jetTable_;
|
|
BiQuad resonator_;
|
|
PoleZero dcBlock_;
|
|
Noise noise_;
|
|
ADSR adsr_;
|
|
SineWave vibrato_;
|
|
StkFloat maxPressure_;
|
|
StkFloat noiseGain_;
|
|
StkFloat vibratoGain_;
|
|
StkFloat outputGain_;
|
|
|
|
};
|
|
|
|
inline StkFloat BlowBotl :: tick( unsigned int )
|
|
{
|
|
StkFloat breathPressure;
|
|
StkFloat randPressure;
|
|
StkFloat pressureDiff;
|
|
|
|
// Calculate the breath pressure (envelope + vibrato)
|
|
breathPressure = maxPressure_ * adsr_.tick();
|
|
breathPressure += vibratoGain_ * vibrato_.tick();
|
|
|
|
pressureDiff = breathPressure - resonator_.lastOut();
|
|
|
|
randPressure = noiseGain_ * noise_.tick();
|
|
randPressure *= breathPressure;
|
|
randPressure *= (1.0 + pressureDiff);
|
|
|
|
resonator_.tick( breathPressure + randPressure - ( jetTable_.tick( pressureDiff ) * pressureDiff ) );
|
|
lastFrame_[0] = 0.2 * outputGain_ * dcBlock_.tick( pressureDiff );
|
|
|
|
return lastFrame_[0];
|
|
}
|
|
|
|
inline StkFrames& BlowBotl :: tick( StkFrames& frames, unsigned int channel )
|
|
{
|
|
unsigned int nChannels = lastFrame_.channels();
|
|
#if defined(_STK_DEBUG_)
|
|
if ( channel > frames.channels() - nChannels ) {
|
|
oStream_ << "BlowBotl::tick(): channel and StkFrames arguments are incompatible!";
|
|
handleError( StkError::FUNCTION_ARGUMENT );
|
|
}
|
|
#endif
|
|
|
|
StkFloat *samples = &frames[channel];
|
|
unsigned int j, hop = frames.channels() - nChannels;
|
|
if ( nChannels == 1 ) {
|
|
for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
|
|
*samples++ = tick();
|
|
}
|
|
else {
|
|
for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
|
|
*samples++ = tick();
|
|
for ( j=1; j<nChannels; j++ )
|
|
*samples++ = lastFrame_[j];
|
|
}
|
|
}
|
|
|
|
return frames;
|
|
}
|
|
|
|
} // stk namespace
|
|
|
|
#endif
|