mirror of
https://github.com/thestk/stk
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117 lines
3.3 KiB
C++
117 lines
3.3 KiB
C++
/***************************************************/
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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--2017.
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*/
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/***************************************************/
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#include "VoicDrum.h"
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#include <cmath>
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namespace stk {
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VoicDrum :: VoicDrum( void ) : Instrmnt()
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{
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// This counts the number of sounding voices.
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nSounding_ = 0;
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soundOrder_ = std::vector<int> (VOICE_POLYPHONY, -1);
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soundNumber_ = std::vector<int> (VOICE_POLYPHONY, -1);
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}
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VoicDrum :: ~VoicDrum( void )
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{
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}
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char voiceNames[VOICE_NUMWAVES][11] =
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{
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"tak2.raw",
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"tak1.raw",
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"bee1.raw",
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"dee1.raw",
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"dee2.raw",
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"din1.raw",
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"gun1.raw",
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"jun1.raw",
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"jun2.raw",
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"tak3.raw",
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"tak4.raw"
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};
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void VoicDrum :: noteOn( StkFloat instrument, StkFloat amplitude )
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{
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if ( amplitude < 0.0 || amplitude > 1.0 ) {
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oStream_ << "VoicDrum::noteOn: amplitude parameter is out of bounds!";
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handleError( StkError::WARNING ); return;
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}
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int noteNumber = ( (int) instrument ) % 11;
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// If we already have a wave of this note number loaded, just reset
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// it. Otherwise, look first for an unused wave or preempt the
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// oldest if already at maximum polyphony.
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int iWave;
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for ( iWave=0; iWave<VOICE_POLYPHONY; iWave++ ) {
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if ( soundNumber_[iWave] == noteNumber ) {
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if ( waves_[iWave].isFinished() ) {
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soundOrder_[iWave] = nSounding_;
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nSounding_++;
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}
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waves_[iWave].reset();
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filters_[iWave].setPole( 0.999 - (amplitude * 0.6) );
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filters_[iWave].setGain( amplitude );
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break;
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}
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}
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if ( iWave == VOICE_POLYPHONY ) { // This note number is not currently loaded.
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if ( nSounding_ < VOICE_POLYPHONY ) {
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for ( iWave=0; iWave<VOICE_POLYPHONY; iWave++ )
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if ( soundOrder_[iWave] < 0 ) break;
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nSounding_ += 1;
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}
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else {
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for ( iWave=0; iWave<VOICE_POLYPHONY; iWave++ )
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if ( soundOrder_[iWave] == 0 ) break;
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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_[iWave] )
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soundOrder_[j] -= 1;
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}
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}
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soundOrder_[iWave] = nSounding_ - 1;
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soundNumber_[iWave] = noteNumber;
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// Concatenate the rawwave path to the rawwave file
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waves_[iWave].openFile( (std::string("rawwaves/") + voiceNames[ noteNumber ]).c_str(), true );
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if ( Stk::sampleRate() != 22050.0 )
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waves_[iWave].setRate( 22050.0 / Stk::sampleRate() );
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filters_[iWave].setPole( 0.999 - (amplitude * 0.6) );
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filters_[iWave].setGain( amplitude );
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}
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/*
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#if defined(_STK_DEBUG_)
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oStream << "VoicDrum::noteOn: number sounding = " << nSounding_ << '\n';
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for (int i=0; i<nSounding_; i++) oStream << soundNumber_[i] << " ";
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oStream << '\n';
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handleError( StkError::WARNING );
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#endif
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*/
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}
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void VoicDrum :: noteOff( StkFloat amplitude )
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{
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// Set all sounding wave filter gains low.
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int i = 0;
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while ( i < nSounding_ ) filters_[i++].setGain( amplitude * 0.01 );
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}
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} // stk namespace
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