aboutsummaryrefslogtreecommitdiff
path: root/engines/queen/music.cpp
blob: ccd7f9c86fa0dc8dbf9f473d5ee0e35c0a9c1007 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
/* ScummVM - Scumm Interpreter
 * Copyright (C) 2003-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#include "common/stdafx.h"
#include "queen/music.h"
#include "queen/queen.h"
#include "queen/resource.h"
#include "queen/sound.h"

#include "sound/midiparser.h"

namespace Queen {

MusicPlayer::MusicPlayer(MidiDriver *driver, byte *data, uint32 size) : _driver(driver), _isPlaying(false), _looping(false), _randomLoop(false), _masterVolume(192), _queuePos(0), _musicData(data), _musicDataSize(size), _passThrough(false), _buf(0) {
	memset(_channel, 0, sizeof(_channel));
	queueClear();
	_lastSong = _currentSong = 0;
	_parser = MidiParser::createParser_SMF();
	_parser->setMidiDriver(this);
	_parser->setTimerRate(_driver->getBaseTempo());

	_numSongs = READ_LE_UINT16(_musicData);
	this->open();
}

MusicPlayer::~MusicPlayer() {
	_parser->unloadMusic();
	delete _parser;
	this->close();
	delete[] _buf;
}

void MusicPlayer::setVolume(int volume) {
	if (volume < 0)
		volume = 0;
	else if (volume > 255)
		volume = 255;

	if (_masterVolume == volume)
		return;

	_masterVolume = volume;

	for (int i = 0; i < 16; ++i) {
		if (_channel[i])
			_channel[i]->volume(_channelVolume[i] * _masterVolume / 255);
	}
}

bool MusicPlayer::queueSong(uint16 songNum) {
	if (songNum >= _numSongs && songNum < 1000) {
		// this happens at the end of the car chase, where we try to play song 176,
		// see Sound::_tune[], entry 39
		debug(3, "Trying to queue an invalid song number %d, max %d", songNum, _numSongs);
		return false;
	}
	uint8 emptySlots = 0;
	for (int i = 0; i < MUSIC_QUEUE_SIZE; i++)
		if (!_songQueue[i])
			emptySlots++;

	if (!emptySlots)
		return false;

	// 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;

	_songQueue[MUSIC_QUEUE_SIZE - emptySlots] = songNum;
	return true;
}

void MusicPlayer::queueClear() {
	_lastSong = _songQueue[0];
	_queuePos = 0;
	_looping = _randomLoop = false;
	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() {
	_driver->setTimerCallback(NULL, NULL);
	if (_driver)
		_driver->close();
	_driver = 0;
}

void MusicPlayer::send(uint32 b) {
	if (_passThrough) {
		_driver->send(b);
		return;
	}

	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 & 0xF0) == 0xC0 && !_nativeMT32) {
		b = (b & 0xFFFF00FF) | MidiDriver::_mt32ToGm[(b >> 8) & 0xFF] << 8;
	}
	else if ((b & 0xFFF0) == 0x007BB0) {
		//Only respond to All Notes Off if this channel
		//has currently been allocated
		if (_channel[b & 0x0F])
			return;
	}

	//Work around annoying loud notes in certain Roland Floda tunes
	if (channel == 3 && _currentSong == 90)
		return;
	if (channel == 4 && _currentSong == 27)
		return;
	if (channel == 5 && _currentSong == 38)
		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::queueTuneList(int16 tuneList) {
	queueClear();

	//Jungle is the only part of the game that uses multiple tunelists.
	//For the sake of code simplification we just hardcode the extended list ourselves
	if ((tuneList + 1) == 3) {
		_randomLoop = true;
		int i = 0;
		while (Sound::_jungleList[i])
			queueSong(Sound::_jungleList[i++] - 1);
		return;
	}

	int mode = (_numSongs == 40) ? Sound::_tuneDemo[tuneList].mode : Sound::_tune[tuneList].mode;
	switch (mode) {
	case 0: // random loop
		_randomLoop = true;
		setLoop(false);
		break;
	case 1: // sequential loop
		setLoop(_songQueue[1] == 0);
		break;
	case 2: // play once
	default:
		setLoop(false);
		break;
	}

	int i = 0;
	if (_numSongs == 40) {
		while (Sound::_tuneDemo[tuneList].tuneNum[i])
			queueSong(Sound::_tuneDemo[tuneList].tuneNum[i++] - 1);
	} else {
		while (Sound::_tune[tuneList].tuneNum[i])
			queueSong(Sound::_tune[tuneList].tuneNum[i++] - 1);
	}

	if (_randomLoop)
		_queuePos = randomQueuePos();
}

void MusicPlayer::playMusic() {
	if (!_songQueue[0]) {
		debug(5, "MusicPlayer::playMusic - Music queue is empty");
		return;
	}

	uint16 songNum = _songQueue[_queuePos];

	//Special type
	// > 1000 && < 2000 -> queue different tunelist
	// 2000 -> repeat music from previous queue
	if (songNum > 999) {
		if ((songNum + 1) == 2000) {
			songNum = _lastSong;
			queueClear();
			queueSong(songNum);
		} else {
			queueTuneList(songNum - 1000);
			_queuePos = _randomLoop ? randomQueuePos() : 0;
			songNum = _songQueue[_queuePos];
		}
	}

	byte *prevSong = _musicData + songOffset(_currentSong);
	if (*prevSong == 0x43 || *prevSong == 0x63) {
		if (_buf) {
			delete[] _buf;
			_buf = 0;
		}
	}

	_currentSong = songNum;
	if (!songNum) {
		stopMusic();
		return;
	}

	byte *musicPtr = _musicData + songOffset(songNum);
	uint32 size = songLength(songNum);
	if (*musicPtr == 0x43 || *musicPtr == 0x63) {
		uint32 packedSize = songLength(songNum) - 0x200;
		_buf = new uint16[packedSize];

		uint16 *data = (uint16 *)(musicPtr + 1);
		byte *idx  = ((byte *)data) + 0x200;

		for (uint i = 0; i < packedSize; i++)
#if defined(SCUMM_NEED_ALIGNMENT)
			memcpy(&_buf[i], (byte*)((byte*)data + *(idx + i) * sizeof(uint16)), sizeof(uint16));
#else
			_buf[i] = data[*(idx + i)];
#endif

		musicPtr = ((byte *)_buf) + ((*musicPtr == 0x63) ? 1 : 0);
		size = packedSize * 2;
	}

	_parser->loadMusic(musicPtr, size);
	_parser->setTrack(0);
	debug(8, "Playing song %d [queue position: %d]", songNum, _queuePos);
	_isPlaying = true;
	queueUpdatePos();
}

void MusicPlayer::queueUpdatePos() {
	if (_randomLoop) {
		_queuePos = randomQueuePos();
	} else {
		if (_queuePos < (MUSIC_QUEUE_SIZE - 1) && _songQueue[_queuePos + 1])
			_queuePos++;
		else if (_looping)
			_queuePos = 0;
	}
}

uint8 MusicPlayer::randomQueuePos() {
	int queueSize = 0;
	for (int i = 0; i < MUSIC_QUEUE_SIZE; i++)
		if (_songQueue[i])
			queueSize++;

	if (!queueSize)
		return 0;

	return (uint8) _rnd.getRandomNumber(queueSize - 1) & 0xFF;
}

void MusicPlayer::stopMusic() {
	_isPlaying = false;
	_parser->unloadMusic();
}

uint32 MusicPlayer::songOffset(uint16 songNum) const {
	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) const {
	if (songNum < _numSongs)
		return (songOffset(songNum + 1) - songOffset(songNum));
	return (_musicDataSize - songOffset(songNum));
}

Music::Music(MidiDriver *driver, QueenEngine *vm) : _vToggle(false) {
	if (vm->resource()->isDemo()) {
		_musicData = vm->resource()->loadFile("AQ8.RL", 0, &_musicDataSize);
	} else {
		_musicData = vm->resource()->loadFile("AQ.RL", 0, &_musicDataSize);
	}
	_player = new MusicPlayer(driver, _musicData, _musicDataSize);
}

Music::~Music() {
	delete _player;
	delete[] _musicData;
}

void Music::playSong(uint16 songNum) {
	_player->queueClear();
	_player->queueSong(songNum);
	_player->playMusic();
}

void Music::toggleVChange() {
	setVolume(_vToggle ? (volume() * 2) : (volume() / 2));
	_vToggle ^= true;
}

} // End of namespace Queen