diff options
Diffstat (limited to 'plugins/adplug/adplug/xsm.cpp')
-rw-r--r-- | plugins/adplug/adplug/xsm.cpp | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/plugins/adplug/adplug/xsm.cpp b/plugins/adplug/adplug/xsm.cpp new file mode 100644 index 00000000..3c97de04 --- /dev/null +++ b/plugins/adplug/adplug/xsm.cpp @@ -0,0 +1,117 @@ +/* + * Adplug - Replayer for many OPL2/OPL3 audio file formats. + * Copyright (C) 1999 - 2003 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 + * + * xsm.cpp - eXtra Simple Music Player, by Simon Peter <dn.tlp@gmx.net> + */ + +#include <string.h> + +#include "xsm.h" + +CxsmPlayer::CxsmPlayer(Copl *newopl) + : CPlayer(newopl), music(0) +{ +} + +CxsmPlayer::~CxsmPlayer() +{ + if(music) delete [] music; +} + +bool CxsmPlayer::load(const std::string &filename, const CFileProvider &fp) +{ + binistream *f = fp.open(filename); if(!f) return false; + char id[6]; + int i, j; + + // check if header matches + f->readString(id, 6); songlen = f->readInt(2); + if(strncmp(id, "ofTAZ!", 6) || songlen > 3200) { fp.close(f); return false; } + + // read and set instruments + for(i = 0; i < 9; i++) { + opl->write(0x20 + op_table[i], f->readInt(1)); + opl->write(0x23 + op_table[i], f->readInt(1)); + opl->write(0x40 + op_table[i], f->readInt(1)); + opl->write(0x43 + op_table[i], f->readInt(1)); + opl->write(0x60 + op_table[i], f->readInt(1)); + opl->write(0x63 + op_table[i], f->readInt(1)); + opl->write(0x80 + op_table[i], f->readInt(1)); + opl->write(0x83 + op_table[i], f->readInt(1)); + opl->write(0xe0 + op_table[i], f->readInt(1)); + opl->write(0xe3 + op_table[i], f->readInt(1)); + opl->write(0xc0 + op_table[i], f->readInt(1)); + f->ignore(5); + } + + // read song data + music = new char [songlen * 9]; + for(i = 0; i < 9; i++) + for(j = 0; j < songlen; j++) + music[j * 9 + i] = f->readInt(1); + + // success + fp.close(f); + rewind(0); + return true; +} + +bool CxsmPlayer::update() +{ + int c; + + if(notenum >= songlen) { + songend = true; + notenum = last = 0; + } + + for(c = 0; c < 9; c++) + if(music[notenum * 9 + c] != music[last * 9 + c]) + opl->write(0xb0 + c, 0); + + for(c = 0; c < 9; c++) { + if(music[notenum * 9 + c]) + play_note(c, music[notenum * 9 + c] % 12, music[notenum * 9 + c] / 12); + else + play_note(c, 0, 0); + } + + last = notenum; + notenum++; + return !songend; +} + +void CxsmPlayer::rewind(int subsong) +{ + notenum = last = 0; + songend = false; +} + +float CxsmPlayer::getrefresh() +{ + return 5.0f; +} + +void CxsmPlayer::play_note(int c, int note, int octv) +{ + int freq = note_table[note]; + + if(!note && !octv) freq = 0; + opl->write(0xa0 + c, freq & 0xff); + opl->write(0xb0 + c, (freq / 0xff) | 32 | (octv * 4)); +} |