/usr/include/stk/Drummer.h is in libstk0-dev 4.5.2+dfsg-5.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | #ifndef STK_DRUMMER_H
#define STK_DRUMMER_H
#include "Instrmnt.h"
#include "FileWvIn.h"
#include "OnePole.h"
namespace stk {
/***************************************************/
/*! \class Drummer
\brief STK drum sample player class.
This class implements a drum sampling
synthesizer using WvIn 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) via a #define in the
Drummer.h.
by Perry R. Cook and Gary P. Scavone, 1995--2014.
*/
/***************************************************/
const int DRUM_NUMWAVES = 11;
const int DRUM_POLYPHONY = 4;
class Drummer : public Instrmnt
{
public:
//! Class constructor.
/*!
An StkError will be thrown if the rawwave path is incorrectly set.
*/
Drummer( void );
//! Class destructor.
~Drummer( void );
//! Start a note with the given drum type and amplitude.
/*!
Use general MIDI drum instrument numbers, converted to
frequency values as if MIDI note numbers, to select a particular
instrument. An StkError will be thrown if the rawwave path is
incorrectly set.
*/
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_[DRUM_POLYPHONY];
OnePole filters_[DRUM_POLYPHONY];
std::vector<int> soundOrder_;
std::vector<int> soundNumber_;
int nSounding_;
};
inline StkFloat Drummer :: tick( unsigned int )
{
lastFrame_[0] = 0.0;
if ( nSounding_ == 0 ) return lastFrame_[0];
for ( int i=0; i<DRUM_POLYPHONY; i++ ) {
if ( soundOrder_[i] >= 0 ) {
if ( waves_[i].isFinished() ) {
// Re-order the list.
for ( int j=0; j<DRUM_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& Drummer :: tick( StkFrames& frames, unsigned int channel )
{
unsigned int nChannels = lastFrame_.channels();
#if defined(_STK_DEBUG_)
if ( channel > frames.channels() - nChannels ) {
oStream_ << "Drummer::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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