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/* ScummVM - Scumm Interpreter
* Copyright (C) 2003-2004 The ScummVM project
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "queen/music.h"
#include "queen/queen.h"
#include "queen/resource.h"
#include "sound/midiparser.h"
namespace Queen {
MusicPlayer::MusicPlayer(MidiDriver *driver, byte *data, uint32 size) : _driver(driver), _isPlaying(false), _looping(false), _volume(255), _queuePos(0), _musicData(data), _musicDataSize(size) {
memset(_channel, 0, sizeof(_channel));
queueClear();
_lastSong = 0;
_parser = MidiParser::createParser_SMF();
_parser->setMidiDriver(this);
_parser->setTimerRate(_driver->getBaseTempo());
_numSongs = READ_LE_UINT16(_musicData);
this->open();
}
MusicPlayer::~MusicPlayer() {
_driver->setTimerCallback(NULL, NULL);
_parser->unloadMusic();
this->close();
delete _parser;
}
bool MusicPlayer::queueSong(uint16 songNum) {
uint8 emptySlots = 0;
for (int i = 0; i < MUSIC_QUEUE_SIZE; i++)
if (!_songQueue[i])
emptySlots++;
if (!emptySlots)
return false;
_songQueue[MUSIC_QUEUE_SIZE - emptySlots] = songNum;
return true;
}
void MusicPlayer::queueClear() {
_lastSong = _songQueue[0];
_queuePos = 0;
memset(_songQueue, 0, sizeof(_songQueue));
}
int MusicPlayer::open() {
// Don't ever call open without first setting the output driver!
if (!_driver)
return 255;
int ret = _driver->open();
if (ret)
return ret;
_driver->setTimerCallback(this, &onTimer);
return 0;
}
void MusicPlayer::close() {
stopMusic();
if (_driver)
_driver->close();
_driver = 0;
}
void MusicPlayer::send(uint32 b) {
byte channel = (byte)(b & 0x0F);
if ((b & 0xFFF0) == 0x07B0) {
// Adjust volume changes by master volume
byte volume = (byte)((b >> 16) & 0x7F);
_channelVolume[channel] = volume;
//volume = volume * _masterVolume / 255;
b = (b & 0xFF00FFFF) | (volume << 16);
}
else if ((b & 0xFFF0) == 0x007BB0) {
//Only respond to All Notes Off if this channel
//has currently been allocated
if (_channel[b & 0x0F])
return;
}
if (!_channel[channel])
_channel[channel] = (channel == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel();
if (_channel[channel])
_channel[channel]->send(b);
}
void MusicPlayer::metaEvent(byte type, byte *data, uint16 length) {
//Only thing we care about is End of Track.
if (type != 0x2F)
return;
if (_looping || _songQueue[1])
playMusic();
else
stopMusic();
}
void MusicPlayer::onTimer(void *refCon) {
MusicPlayer *music = (MusicPlayer *)refCon;
if (music->_isPlaying)
music->_parser->onTimer();
}
void MusicPlayer::playMusic() {
if (!_queuePos && !_songQueue[_queuePos]) {
debug(5, "MusicPlayer::playMusic - Music queue is empty!");
return;
}
uint16 songNum = _songQueue[_queuePos];
//Special type
//2000: (songNum + 1) - repeat music from previous queue
if (songNum == 1999) {
songNum = _lastSong;
queueClear();
queueSong(songNum);
}
_parser->loadMusic(_musicData + songOffset(songNum), songLength(songNum));
_parser->setTrack(0);
//debug(0, "Playing song %d [queue position: %d]", songNum, _queuePos);
_isPlaying = true;
queueUpdatePos();
}
void MusicPlayer::queueUpdatePos() {
if (_queuePos < (MUSIC_QUEUE_SIZE - 1) && _songQueue[_queuePos + 1])
_queuePos++;
else
_queuePos = 0;
}
void MusicPlayer::stopMusic() {
_isPlaying = false;
_parser->unloadMusic();
}
uint32 MusicPlayer::songOffset(uint16 songNum) {
uint16 offsLo = READ_LE_UINT16(_musicData + (songNum * 4) + 2);
uint16 offsHi = READ_LE_UINT16(_musicData + (songNum * 4) + 4);
return (offsHi << 4) | offsLo;
}
uint32 MusicPlayer::songLength(uint16 songNum) {
if (songNum < _numSongs)
return (songOffset(songNum + 1) - songOffset(songNum));
return (_musicDataSize - songOffset(songNum));
}
Music::Music(MidiDriver *driver, QueenEngine *vm) {
if (vm->resource()->isDemo()) {
_musicData = vm->resource()->loadFile("AQ8.RL", 0, NULL);
_musicDataSize = vm->resource()->fileSize("AQ8.RL");
} else {
_musicData = vm->resource()->loadFile("AQ.RL", 0, NULL);
_musicDataSize = vm->resource()->fileSize("AQ.RL");
}
_player = new MusicPlayer(driver, _musicData, _musicDataSize);
}
Music::~Music() {
delete _player;
delete[] _musicData;
}
bool Music::queueSong(uint16 songNum) {
// Work around bug in Roland music, note that these numbers are 'one-off'
// from the original code
if (/*isRoland && */ songNum == 88 || songNum == 89)
songNum = 62;
return _player->queueSong(songNum);
}
void Music::playSong(uint16 songNum) {
_player->queueClear();
_player->queueSong(songNum);
_player->playMusic();
}
void Music::stopSong() {
return _player->stopMusic();
}
} // End of namespace Queen
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