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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* raw.c - RAW Player by Simon Peter <dn.tlp@gmx.net>
*/
/*
* Copyright (c) 2015 - 2017 Wraithverge <liam82067@yahoo.com>
* - Preliminary support for displaying arbitrary Tag data. (2015)
* - Realigned to Tabs. (2017)
* - Added Member pointers. (2017)
* - Finalized Tag support. (2017)
*/
#include <cstring>
#include "raw.h"
/*** public methods *************************************/
CPlayer *CrawPlayer::factory(Copl *newopl)
{
return new CrawPlayer(newopl);
}
bool CrawPlayer::load(const std::string &filename, const CFileProvider &fp)
{
binistream *f = fp.open(filename);
if (!f) return false;
char id[8];
unsigned long i = 0;
// file validation section
f->readString(id, 8);
if (strncmp(id,"RAWADATA",8)) { fp.close (f); return false; }
// load section
this->clock = f->readInt(2); // clock speed
this->length = (fp.filesize(f) - 10) / 2; // Wraithverge: total data-size.
this->data = new Tdata [this->length];
bool tagdata = false;
title[0] = 0;
author[0] = 0;
desc[0] = 0;
for (i = 0; i < this->length; i++) {
// Do not store tag data in track data.
this->data[i].param = (tagdata ? 0xFF : f->readInt(1));
this->data[i].command = (tagdata ? 0xFF : f->readInt(1));
// Continue trying to stop at the RAW EOF data marker.
if (!tagdata && this->data[i].param == 0xFF && this->data[i].command == 0xFF) {
unsigned char tagCode = f->readInt(1);
if (tagCode == 0x1A) {
// Tag marker found.
tagdata = true;
} else if (tagCode == 0) {
// Old comment (music archive 2004)
f->readString(desc, 1023, 0);
} else {
// This is not tag marker, revert.
f->seek(-1, binio::Add);
}
}
}
if (tagdata)
{
// The arbitrary Tag Data section begins here.
// "title" is maximum 40 characters long.
f->readString(title, 40, 0);
// Skip "author" if Tag marker byte is missing.
if (f->readInt(1) != 0x1B) {
f->seek(-1, binio::Add);
// Check for older version tag (e.g. stunts.raw)
if (f->readInt(1) >= 0x20) {
f->seek(-1, binio::Add);
f->readString(author, 60, 0);
f->readString(desc, 1023, 0);
goto end_section;
}
else
f->seek(-1, binio::Add);
goto desc_section;
}
// "author" is maximum 40 characters long.
f->readString(author, 40, 0);
desc_section:
// Skip "desc" if Tag marker byte is missing.
if (f->readInt(1) != 0x1C) {
goto end_section;
}
// "desc" is now maximum 1023 characters long (it was 140).
f->readString(desc, 1023, 0);
}
end_section:
fp.close(f);
rewind(0);
return true;
}
bool CrawPlayer::update()
{
bool setspeed = 0;
if (this->pos >= this->length) return false;
if (this->del) {
del--;
return !songend;
}
do {
setspeed = false;
switch(this->data[this->pos].command) {
case 0:
this->del = this->data[this->pos].param - 1;
break;
case 2:
if (!this->data[this->pos].param) {
pos++;
this->speed = this->data[this->pos].param + (this->data[this->pos].command << 8);
setspeed = true;
} else
opl->setchip(this->data[this->pos].param - 1);
break;
case 0xff:
if (this->data[this->pos].param == 0xff) {
rewind(0); // auto-rewind song
songend = true;
return !songend;
}
break;
default:
opl->write(this->data[this->pos].command, this->data[this->pos].param);
break;
}
} while (this->data[this->pos++].command || setspeed);
return !songend;
}
void CrawPlayer::rewind(int subsong)
{
pos = del = 0; speed = clock; songend = false;
opl->init(); opl->write(1, 32); // go to 9 channel mode
}
float CrawPlayer::getrefresh()
{
// timer oscillator speed / wait register = clock frequency
return 1193180.0 / (speed ? speed : 0xffff);
}