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/*
* Adplug - Replayer for many OPL2/OPL3 audio file formats.
* Copyright (C) 1999 - 2007 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
*
* dro2.cpp - DOSBox Raw OPL v2.0 player by Adam Nielsen <malvineous@shikadi.net>
*/
#include <cstring>
#include <stdio.h>
#include "dro2.h"
CPlayer *Cdro2Player::factory(Copl *newopl)
{
return new Cdro2Player(newopl);
}
Cdro2Player::Cdro2Player(Copl *newopl) :
CPlayer(newopl),
piConvTable(NULL),
data(0)
{
}
Cdro2Player::~Cdro2Player()
{
if (this->data) delete[] this->data;
if (this->piConvTable) delete[] this->piConvTable;
}
bool Cdro2Player::load(const std::string &filename, const CFileProvider &fp)
{
binistream *f = fp.open(filename);
if (!f) return false;
char id[8];
f->readString(id, 8);
if (strncmp(id, "DBRAWOPL", 8)) {
fp.close(f);
return false;
}
int version = f->readInt(4);
if (version != 0x2) {
fp.close(f);
return false;
}
this->iLength = f->readInt(4) * 2; // stored in file as number of byte pairs
f->ignore(4); // Length in milliseconds
f->ignore(1); /// OPL type (0 == OPL2, 1 == Dual OPL2, 2 == OPL3)
int iFormat = f->readInt(1);
if (iFormat != 0) {
fp.close(f);
return false;
}
int iCompression = f->readInt(1);
if (iCompression != 0) {
fp.close(f);
return false;
}
this->iCmdDelayS = f->readInt(1);
this->iCmdDelayL = f->readInt(1);
this->iConvTableLen = f->readInt(1);
this->piConvTable = new uint8_t[this->iConvTableLen];
f->readString((char *)this->piConvTable, this->iConvTableLen);
this->data = new uint8_t[this->iLength];
f->readString((char *)this->data, this->iLength);
fp.close(f);
rewind(0);
return true;
}
bool Cdro2Player::update()
{
while (this->iPos < this->iLength) {
int iIndex = this->data[this->iPos++];
int iValue = this->data[this->iPos++];
// Short delay
if (iIndex == this->iCmdDelayS) {
this->iDelay = iValue + 1;
return true;
// Long delay
} else if (iIndex == this->iCmdDelayL) {
this->iDelay = (iValue + 1) << 8;
return true;
// Normal write
} else {
if (iIndex & 0x80) {
// High bit means use second chip in dual-OPL2 config
this->opl->setchip(1);
iIndex &= 0x7F;
} else {
this->opl->setchip(0);
}
if (iIndex > this->iConvTableLen) {
printf("DRO2: Error - index beyond end of codemap table! Corrupted .dro?\n");
return false; // EOF
}
int iReg = this->piConvTable[iIndex];
this->opl->write(iReg, iValue);
}
}
// This won't result in endless-play using Adplay, but IMHO that code belongs
// in Adplay itself, not here.
return this->iPos < this->iLength;
}
void Cdro2Player::rewind(int subsong)
{
this->iDelay = 0;
this->iPos = 0;
opl->init();
}
float Cdro2Player::getrefresh()
{
if (this->iDelay > 0) return 1000.0 / this->iDelay;
else return 1000.0;
}
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