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