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#ifndef STK_VOICDRUM_H
#define STK_VOICDRUM_H
#include "Instrmnt.h"
#include "FileWvIn.h"
#include "OnePole.h"
namespace stk {
/***************************************************/
/*! \class VoicDrum
\brief STK vocal drum sample player class.
This class implements a drum sampling synthesizer using FileWvIn
objects and one-pole filters. The drum rawwave files are sampled
at 22050 Hz, but will be appropriately interpolated for other
sample rates. You can specify the maximum polyphony (maximum
number of simultaneous voices) in VoicDrum.h.
by Perry R. Cook and Gary P. Scavone, 1995--2023.
*/
/***************************************************/
const int VOICE_NUMWAVES = 11;
const int VOICE_POLYPHONY = 4;
class VoicDrum : public Instrmnt
{
public:
//! Class constructor.
VoicDrum( void );
//! Class destructor.
~VoicDrum( void );
//! Start a note with the given drum type and amplitude.
void noteOn( StkFloat instrument, StkFloat amplitude );
//! Stop a note with the given amplitude (speed of decay).
void noteOff( StkFloat amplitude );
//! 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:
FileWvIn waves_[VOICE_POLYPHONY];
OnePole filters_[VOICE_POLYPHONY];
std::vector<int> soundOrder_;
std::vector<int> soundNumber_;
int nSounding_;
};
inline StkFloat VoicDrum :: tick( unsigned int )
{
lastFrame_[0] = 0.0;
if ( nSounding_ == 0 ) return lastFrame_[0];
for ( int i=0; i<VOICE_POLYPHONY; i++ ) {
if ( soundOrder_[i] >= 0 ) {
if ( waves_[i].isFinished() ) {
// Re-order the list.
for ( int j=0; j<VOICE_POLYPHONY; j++ ) {
if ( soundOrder_[j] > soundOrder_[i] )
soundOrder_[j] -= 1;
}
soundOrder_[i] = -1;
nSounding_--;
}
else
lastFrame_[0] += filters_[i].tick( waves_[i].tick() );
}
}
return lastFrame_[0];
}
inline StkFrames& VoicDrum :: tick( StkFrames& frames, unsigned int channel )
{
unsigned int nChannels = lastFrame_.channels();
#if defined(_STK_DEBUG_)
if ( channel > frames.channels() - nChannels ) {
oStream_ << "VoicDrum::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
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