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76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
/*
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* AdPlug - Replayer for many OPL2/OPL3 audio file formats.
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* Copyright (C) 1999 - 2004 Simon Peter <dn.tlp@gmx.net>, et al.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* temuopl.cpp - Tatsuyuki Satoh's OPL2 emulator, by Simon Peter <dn.tlp@gmx.net>
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*/
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#include "temuopl.h"
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CTemuopl::CTemuopl(int rate, bool bit16, bool usestereo)
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: use16bit(bit16), stereo(usestereo)
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{
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opl = OPLCreate(OPL_TYPE_YM3812, 3579545, rate);
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}
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CTemuopl::~CTemuopl()
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{
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OPLDestroy(opl);
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}
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void CTemuopl::update(short *buf, int samples)
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{
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int i;
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if(use16bit) {
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YM3812UpdateOne(opl,buf,samples);
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if(stereo)
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for(i=samples-1;i>=0;i--) {
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buf[i*2] = buf[i];
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buf[i*2+1] = buf[i];
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}
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} else {
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short *tempbuf = new short[stereo ? samples*2 : samples];
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int i;
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YM3812UpdateOne(opl,tempbuf,samples);
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if(stereo)
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for(i=samples-1;i>=0;i--) {
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tempbuf[i*2] = tempbuf[i];
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tempbuf[i*2+1] = tempbuf[i];
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}
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for(i=0;i<(stereo ? samples*2 : samples);i++)
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((char *)buf)[i] = (tempbuf[i] >> 8) ^ 0x80;
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delete [] tempbuf;
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}
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}
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void CTemuopl::write(int reg, int val)
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{
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OPLWrite(opl,0,reg);
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OPLWrite(opl,1,val);
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}
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void CTemuopl::init()
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{
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OPLResetChip(opl);
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}
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