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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* hsp.cpp - HSP Loader by Simon Peter <dn.tlp@gmx.net>
*/
#include <string.h>
#include "hsp.h"
CPlayer *ChspLoader::factory(Copl *newopl)
{
return new ChspLoader(newopl);
}
bool ChspLoader::load(const std::string &filename, const CFileProvider &fp)
{
binistream *f = fp.open(filename); if(!f) return false;
unsigned long i, j, orgsize, filesize;
unsigned char *cmp, *org;
// file validation section
if(!fp.extension(filename, ".hsp")) { fp.close(f); return false; }
filesize = fp.filesize(f);
orgsize = f->readInt(2);
if(orgsize > 59187) { fp.close(f); return false; }
// load section
cmp = new unsigned char[filesize];
for(i = 0; i < filesize; i++) cmp[i] = f->readInt(1);
fp.close(f);
org = new unsigned char[orgsize];
for(i = 0, j = 0; i < filesize; j += cmp[i], i += 2) { // RLE decompress
if(j >= orgsize) break; // memory boundary check
memset(org + j, cmp[i + 1], j + cmp[i] < orgsize ? cmp[i] : orgsize - j - 1);
}
if (j < orgsize) {
orgsize = j;
}
delete [] cmp;
if (orgsize < 128 * 12 + 51) { // check decompressed size
delete [] org;
return false;
}
memcpy(instr, org, 128 * 12); // instruments
for(i = 0; i < 128; i++) { // correct instruments
instr[i][2] ^= (instr[i][2] & 0x40) << 1;
instr[i][3] ^= (instr[i][3] & 0x40) << 1;
instr[i][11] >>= 4; // slide
}
memcpy(song, org + 128 * 12, 51); // tracklist
memcpy(patterns, org + 128 * 12 + 51, orgsize - 128 * 12 - 51); // patterns
delete [] org;
rewind(0);
return true;
}
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