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/*
* Adplug - Replayer for many OPL2/OPL3 audio file formats.
* Copyright (C) 1999 - 2005 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
*
* diskopl.cpp - Disk Writer OPL, by Simon Peter <dn.tlp@gmx.net>
*/
#include "diskopl.h"
//static const unsigned short note_table[12] = {363,385,408,432,458,485,514,544,577,611,647,686};
const unsigned char CDiskopl::op_table[9] = {0x00, 0x01, 0x02, 0x08, 0x09, 0x0a, 0x10, 0x11, 0x12};
CDiskopl::CDiskopl(const char * filename)
: old_freq(0.0f), del(1), nowrite(false)
{
unsigned short clock = 0xffff;
currType = TYPE_OPL3;
f = fopen(filename,"wb");
fwrite("RAWADATA",8,1,f);
fwrite(&clock,sizeof(clock),1,f);
}
CDiskopl::~CDiskopl()
{
fclose(f);
}
void CDiskopl::update(CPlayer *p)
{
unsigned short clock;
unsigned int wait;
if(p->getrefresh() != old_freq) {
old_freq = p->getrefresh();
del = wait = (unsigned int)(18.2f / old_freq);
clock = (unsigned short)(1192737/(old_freq*(wait+1)));
fputc(0,f); fputc(2,f);
fwrite(&clock,2,1,f);
}
if(!nowrite) {
fputc(del+1,f);
fputc(0,f);
}
}
void CDiskopl::setchip(int n)
{
Copl::setchip(n);
if(!nowrite) {
fputc(currChip + 1, f);
fputc(2, f);
}
}
void CDiskopl::write(int reg, int val)
{
if(!nowrite)
diskwrite(reg,val);
}
void CDiskopl::init()
{
for (int i=0;i<9;i++) { // stop instruments
diskwrite(0xb0 + i,0); // key off
diskwrite(0x80 + op_table[i],0xff); // fastest release
}
diskwrite(0xbd,0); // clear misc. register
}
void CDiskopl::diskwrite(int reg, int val)
{
fputc(val,f);
fputc(reg,f);
}
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