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https://github.com/thestk/stk
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82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
#ifndef STK_VOICDRUM_H
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#define STK_VOICDRUM_H
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#include "Instrmnt.h"
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#include "FileWvIn.h"
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#include "OnePole.h"
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namespace stk {
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/***************************************************/
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/*! \class VoicDrum
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\brief STK vocal drum sample player class.
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This class implements a drum sampling synthesizer using FileWvIn
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objects and one-pole filters. The drum rawwave files are sampled
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at 22050 Hz, but will be appropriately interpolated for other
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sample rates. You can specify the maximum polyphony (maximum
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number of simultaneous voices) in VoicDrum.h.
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by Perry R. Cook and Gary P. Scavone, 1995 - 2009.
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*/
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/***************************************************/
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const int VOICE_NUMWAVES = 11;
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const int VOICE_POLYPHONY = 4;
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class VoicDrum : public Instrmnt
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{
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public:
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//! Class constructor.
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VoicDrum( void );
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//! Class destructor.
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~VoicDrum( void );
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//! Start a note with the given drum type and amplitude.
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void noteOn( StkFloat instrument, 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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//! Compute and return one output sample.
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StkFloat tick( unsigned int channel = 0 );
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protected:
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FileWvIn waves_[VOICE_POLYPHONY];
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OnePole filters_[VOICE_POLYPHONY];
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std::vector<int> soundOrder_;
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std::vector<int> soundNumber_;
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int nSounding_;
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};
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inline StkFloat VoicDrum :: tick( unsigned int )
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{
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lastFrame_[0] = 0.0;
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if ( nSounding_ == 0 ) return lastFrame_[0];
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for ( int i=0; i<VOICE_POLYPHONY; i++ ) {
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if ( soundOrder_[i] >= 0 ) {
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if ( waves_[i].isFinished() ) {
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// Re-order the list.
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for ( int j=0; j<VOICE_POLYPHONY; j++ ) {
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if ( soundOrder_[j] > soundOrder_[i] )
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soundOrder_[j] -= 1;
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}
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soundOrder_[i] = -1;
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nSounding_--;
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}
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else
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lastFrame_[0] += filters_[i].tick( waves_[i].tick() );
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}
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}
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return lastFrame_[0];
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}
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} // stk namespace
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#endif
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