aboutsummaryrefslogtreecommitdiff
path: root/simon/midi.cpp
blob: b658bd1f543358f83946fb3172239ca30fa736f3 (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
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001-2004 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 "common/scummsys.h"
#include "common/system.h"
#include "common/file.h"
#include "sound/mixer.h"
#include "simon/simon.h"

namespace Simon {


// MidiParser_S1D is not considered part of the standard
// MidiParser suite, but we still try to mask its details
// and just provide a factory function.
extern MidiParser *MidiParser_createS1D();


// Instrument mapping for MT32 tracks emulated under GM.
static const byte mt32_to_gm[128] = {
//    0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F
	  0,   1,   0,   2,   4,   4,   5,   3,  16,  17,  18,  16,  16,  19,  20,  21, // 0x
	  6,   6,   6,   7,   7,   7,   8, 112,  62,  62,  63,  63,  38,  38,  39,  39, // 1x
	 88,  95,  52,  98,  97,  99,  14,  54, 102,  96,  53, 102,  81, 100,  14,  80, // 2x
	 48,  48,  49,  45,  41,  40,  42,  42,  43,  46,  45,  24,  25,  28,  27, 104, // 3x
	 32,  32,  34,  33,  36,  37,  35,  35,  79,  73,  72,  72,  74,  75,  64,  65, // 4x
	 66,  67,  71,  71,  68,  69,  70,  22,  56,  59,  57,  57,  60,  60,  58,  61, // 5x
	 61,  11,  11,  98,  14,   9,  14,  13,  12, 107, 107,  77,  78,  78,  76,  76, // 6x
	 47, 117, 127, 118, 118, 116, 115, 119, 115, 112,  55, 124, 123,   0,  14, 117  // 7x
};



MidiPlayer::MidiPlayer(OSystem *system) {
	// Since initialize() is called every time the music changes,
	// this is where we'll initialize stuff that must persist
	// between songs.
	_system = system;
	_mutex = system->create_mutex();
	_driver = 0;
	_map_mt32_to_gm = false;
	
	_enable_sfx = true;
	_current = 0;

	_masterVolume = 255;
	resetVolumeTable();
	_paused = false;

	_currentTrack = 255;
	_loopTrack = 0;
	_queuedTrack = 255;
	_loopQueuedTrack = 0;
}

MidiPlayer::~MidiPlayer() {
	_system->lock_mutex(_mutex);
	close();
	_system->unlock_mutex(_mutex);
	_system->delete_mutex(_mutex);
}

int MidiPlayer::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 MidiPlayer::close() {
	stop();
//	_system->lock_mutex (_mutex);
	if (_driver)
		_driver->close();
	_driver = NULL;
	clearConstructs();
//	_system->unlock_mutex (_mutex);
}

void MidiPlayer::send(uint32 b) {
	if (!_current)
		return;

	byte channel = (byte) (b & 0x0F);
	if ((b & 0xFFF0) == 0x07B0) {
		// Adjust volume changes by master volume.
		byte volume = (byte) ((b >> 16) & 0x7F);
		_current->volume[channel] = volume;
		volume = volume * _masterVolume / 255;
		b = (b & 0xFF00FFFF) | (volume << 16);
	} else if ((b & 0xF0) == 0xC0 && _map_mt32_to_gm) {
		b = (b & 0xFFFF00FF) | (mt32_to_gm[(b >> 8) & 0xFF] << 8);
	} else if ((b & 0xFFF0) == 0x007BB0) {
		// Only respond to an All Notes Off if this channel
		// has already been allocated.
		if (!_current->channel[b & 0x0F])
			return;
	}

	if (!_current->channel[channel])
		_current->channel[channel] = (channel == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel();
	if (_current->channel[channel]) {
		if (channel == 9)
			_current->channel[9]->volume (_current->volume[9] * _masterVolume / 255);
		_current->channel[channel]->send(b);
	}
}

void MidiPlayer::metaEvent (byte type, byte *data, uint16 length) {
	// Only thing we care about is End of Track.
	if (!_current || type != 0x2F) {
		return;
	} else if (_current == &_sfx) {
		clearConstructs(_sfx);
	} else if (_loopTrack) {
		_current->parser->jumpToTick(0);
	} else if (_queuedTrack != 255) {
		_currentTrack = 255;
		byte destination = _queuedTrack;
		_queuedTrack = 255;
		_loopTrack = _loopQueuedTrack;
		_loopQueuedTrack = false;

		// Remember, we're still inside the locked mutex.
		// Have to unlock it before calling jump()
		// (which locks it itself), and then relock it
		// upon returning.
		_system->unlock_mutex(_mutex);
		startTrack (destination);
		_system->lock_mutex(_mutex);
	} else {
		stop();
	}
}

void MidiPlayer::onTimer (void *data) {
	MidiPlayer *p = (MidiPlayer *) data;
	p->_system->lock_mutex(p->_mutex);
	if (!p->_paused) {
		if (p->_music.parser && p->_currentTrack != 255) {
			p->_current = &p->_music;
			p->_music.parser->onTimer();
		}
	}
	if (p->_sfx.parser) {
		p->_current = &p->_sfx;
		p->_sfx.parser->onTimer();
	}
	p->_current = 0;
	p->_system->unlock_mutex(p->_mutex);
}

void MidiPlayer::startTrack (int track) {
	if (track == _currentTrack)
		return;

	if (_music.num_songs > 0) {
		if (track >= _music.num_songs)
			return;

		_system->lock_mutex(_mutex);

		if (_music.parser) {
			_current = &_music;
			delete _music.parser;
			_current = 0;
			_music.parser = 0;
		}

		MidiParser *parser = MidiParser::createParser_SMF();
		parser->property (MidiParser::mpMalformedPitchBends, 1);
		parser->setMidiDriver (this);
		parser->setTimerRate (_driver->getBaseTempo());
		if (!parser->loadMusic (_music.songs[track], _music.song_sizes[track])) {
			printf ("Error reading track!\n");
			delete parser;
			parser = 0;
		}

		_currentTrack = (byte) track;
		_music.parser = parser; // That plugs the power cord into the wall
	} else if (_music.parser) {
		_system->lock_mutex(_mutex);
		if (!_music.parser->setTrack(track)) {
			_system->unlock_mutex(_mutex);
			return;
		}
		_currentTrack = (byte) track;
		_current = &_music;
		_music.parser->jumpToTick(0);
		_current = 0;
	}

	_system->unlock_mutex(_mutex);
}

void MidiPlayer::stop() {
	_system->lock_mutex(_mutex);
	if (_music.parser) {
		_current = &_music;
		_music.parser->jumpToTick(0);
	}
	_current = 0;
	_currentTrack = 255;
	_system->unlock_mutex(_mutex);
}

void MidiPlayer::pause (bool b) {
	if (_paused == b || !_driver)
		return;
	_paused = b;

	_system->lock_mutex(_mutex);
	for (int i = 0; i < 16; ++i) {
		if (_music.channel[i])
			_music.channel[i]->volume (_paused ? 0 : (_music.volume[i] * _masterVolume / 255));
		if (_sfx.channel[i])
			_sfx.channel[i]->volume (_paused ? 0 : (_sfx.volume[i] * _masterVolume / 255));
	}
	_system->unlock_mutex(_mutex);
}

void MidiPlayer::set_volume (int volume) {
	if (volume < 0)
		volume = 0;
	else if (volume > 255)
		volume = 255;

	if (_masterVolume == volume)
		return;
	_masterVolume = volume;

	// Now tell all the channels this.
	_system->lock_mutex (_mutex);
	if (_driver && !_paused) {
		for (int i = 0; i < 16; ++i) {
			if (_music.channel[i])
				_music.channel[i]->volume(_music.volume[i] * _masterVolume / 255);
			if (_sfx.channel[i])
				_sfx.channel[i]->volume(_sfx.volume[i] * _masterVolume / 255);
		}
	}
	_system->unlock_mutex (_mutex);
}

void MidiPlayer::set_driver(MidiDriver *md) {
	// Don't try to set this more than once.
	if (_driver)
		return;
	_driver = md;
}

void MidiPlayer::mapMT32toGM (bool map) {
	_system->lock_mutex(_mutex);
	_map_mt32_to_gm = map;
	_system->unlock_mutex(_mutex);
}

void MidiPlayer::setLoop (bool loop) {
	_system->lock_mutex(_mutex);
	_loopTrack = loop;
	_system->unlock_mutex(_mutex);
}

void MidiPlayer::queueTrack (int track, bool loop) {
	_system->lock_mutex(_mutex);
	if (_currentTrack == 255) {
		_system->unlock_mutex(_mutex);
		setLoop(loop);
		startTrack(track);
	} else {
		_queuedTrack = track;
		_loopQueuedTrack = loop;
		_system->unlock_mutex(_mutex);
	}
}

void MidiPlayer::clearConstructs() {
	clearConstructs(_music);
	clearConstructs(_sfx);
}

void MidiPlayer::clearConstructs(MusicInfo &info) {
	int i;
	if (info.num_songs > 0) {
		for (i = 0; i < info.num_songs; ++i)
			free (info.songs[i]);
		info.num_songs = 0;
	}

	if (info.data) {
		free(info.data);
		info.data = 0;
	} // end if

	if (info.parser) {
		delete info.parser;
		info.parser = 0;
	}

	if (_driver) {
		for (i = 0; i < 16; ++i) {
			if (info.channel[i]) {
				info.channel[i]->allNotesOff();
				info.channel[i]->release();
			}
		}
	}
	info.clear();
}

void MidiPlayer::resetVolumeTable() {
	int i;
	for (i = 0; i < 16; ++i) {
		_music.volume[i] = _sfx.volume[i] = 127;
		if (_driver)
			_driver->send (((_masterVolume >> 1) << 16) | 0x7B0 | i);
	}
}

static int simon1_gmf_size[] = {
	8900, 12166, 2848, 3442, 4034, 4508, 7064, 9730, 6014, 4742, 3138,
	6570, 5384, 8909, 6457, 16321, 2742, 8968, 4804, 8442, 7717,
	9444, 5800, 1381, 5660, 6684, 2456, 4744, 2455, 1177, 1232,
	17256, 5103, 8794, 4884, 16
};

void MidiPlayer::loadSMF (File *in, int song, bool sfx) {
	_system->lock_mutex(_mutex);
	MusicInfo *p = sfx ? &_sfx : &_music;
	clearConstructs (*p);

	uint32 startpos = in->pos();
	byte header[4];
	in->read(header, 4);
	bool isGMF = !memcmp (header, "GMF\x1", 4);
	in->seek(startpos, SEEK_SET);

	uint32 size = in->size() - in->pos();
	if (isGMF) {
		if (sfx) {
			// Multiple GMF resources are stored in the SFX files,
			// but each one is referenced by a pointer at the
			// beginning of the file. Those pointers can be used
			// to determine file size.
			in->seek(0, SEEK_SET);
			uint16 value = in->readUint16LE() >> 2; // Number of resources
			if (song != value - 1) {
				in->seek(song * 2 + 2, SEEK_SET);
				value = in->readUint16LE();
				size = value - startpos;
			}
			in->seek(startpos, SEEK_SET);
		} else if (size >= 64000) {
			// For GMF resources not in separate
			// files, we're going to have to use
			// hardcoded size tables.
			size = simon1_gmf_size[song];
		}
	}

	// When allocating space, add 4 bytes in case
	// this is a GMF and we have to tack on our own
	// End of Track event.
	p->data = (byte *) calloc(size + 4, 1);
	in->read(p->data, size);

	if (!memcmp(p->data, "GMF\x1", 4)) {
		// BTW, here's what we know about the GMF header,
		// the 7 bytes preceding the actual MIDI events.
		// 3 BYTES: 'GMF'
		// 1 BYTE : Always seems to be 0x01
		// 1 BYTE : Always seems to be 0x00
		// 1 BYTE : Ranges from 0x02 to 0x08 (always 0x02 for SFX, though)
		// 1 BYTE : Loop control. 0 = no loop, 1 = loop
		if (!sfx)
			setLoop(p->data[6] != 0);

	}

	MidiParser *parser = MidiParser::createParser_SMF();
	parser->property(MidiParser::mpMalformedPitchBends, 1);
	parser->setMidiDriver(this);
	parser->setTimerRate(_driver->getBaseTempo());
	if (!parser->loadMusic(p->data, size)) {
		printf ("Error reading track!\n");
		delete parser;
		parser = 0;
	}

	if (!sfx) {
		_currentTrack = 255;
		resetVolumeTable();
	}
	p->parser = parser; // That plugs the power cord into the wall
	_system->unlock_mutex(_mutex);
}

void MidiPlayer::loadMultipleSMF (File *in, bool sfx) {
	// This is a special case for Simon 2 Windows.
	// Instead of having multiple sequences as
	// separate tracks in a Type 2 file, simon2win
	// has multiple songs, each of which is a Type 1
	// file. Thus, preceding the songs is a single
	// byte specifying how many songs are coming.
	// We need to load ALL the songs and then
	// treat them as separate tracks -- for the
	// purpose of jumps, anyway.
	_system->lock_mutex(_mutex);
	MusicInfo *p = sfx ? &_sfx : &_music;
	clearConstructs(*p);

	p->num_songs = in->readByte();
	if (p->num_songs > 16) {
		printf ("playMultipleSMF: %d is too many songs to keep track of!\n", (int) p->num_songs);
		_system->unlock_mutex(_mutex);
		return;
	}

	byte i;
	for (i = 0; i < p->num_songs; ++i) {
		byte buf[5];
		uint32 pos = in->pos();

		// Make sure there's a MThd
		in->read(buf, 4);
		if (memcmp (buf, "MThd", 4)) {
			printf ("Expected MThd but found '%c%c%c%c' instead!\n", buf[0], buf[1], buf[2], buf[3]);
			_system->unlock_mutex (_mutex);
			return;
		}
		in->seek(in->readUint32BE() + in->pos(), SEEK_SET);

		// Now skip all the MTrk blocks
		while (true) {
			in->read (buf, 4);
			if (memcmp(buf, "MTrk", 4))
				break;
			in->seek(in->readUint32BE() + in->pos(), SEEK_SET);
		}

		uint32 pos2 = in->pos() - 4;
		uint32 size = pos2 - pos;
		p->songs[i] = (byte *) calloc(size, 1);
		in->seek(pos, SEEK_SET);
		in->read(p->songs[i], size);
		p->song_sizes[i] = size;
	}

	if (!sfx) {
		_currentTrack = 255;
		resetVolumeTable();
	}
	_system->unlock_mutex(_mutex);
}

void MidiPlayer::loadXMIDI(File *in, bool sfx) {
	_system->lock_mutex(_mutex);
	MusicInfo *p = sfx ? &_sfx : &_music;
	clearConstructs(*p);

	char buf[4];
	uint32 pos = in->pos();
	uint32 size = 4;
	in->read(buf, 4);
	if (!memcmp(buf, "FORM", 4)) {
		int i;
		for (i = 0; i < 16; ++i) {
			if (!memcmp(buf, "CAT ", 4))
				break;
			size += 2;
			memcpy(buf, &buf[2], 2);
			in->read(&buf[2], 2);
		}
		if (memcmp(buf, "CAT ", 4)) {
			warning("Could not find 'CAT ' tag to determine resource size!");
			_system->unlock_mutex (_mutex);
			return;
		}
		size += 4 + in->readUint32BE();
		in->seek(pos, 0);
		p->data = (byte *) calloc(size, 1);
		in->read(p->data, size);
	} else {
		warning("Expected 'FORM' tag but found '%c%c%c%c' instead!", buf[0], buf[1], buf[2], buf[3]);
		_system->unlock_mutex(_mutex);
		return;
	}

	MidiParser *parser = MidiParser::createParser_XMIDI();
	parser->setMidiDriver(this);
	parser->setTimerRate(_driver->getBaseTempo());
	if (!parser->loadMusic(p->data, size)) {
		warning("Error reading track!");
		delete parser;
		parser = 0;
	}

	if (!sfx) {
		_currentTrack = 255;
		resetVolumeTable();
	}
	p->parser = parser; // That plugs the power cord into the wall
	_system->unlock_mutex(_mutex);
}

void MidiPlayer::loadS1D (File *in, bool sfx) {
	_system->lock_mutex(_mutex);
	MusicInfo *p = sfx ? &_sfx : &_music;
	clearConstructs(*p);

	uint16 size = in->readUint16LE();
	if (size != in->size() - 2) {
		warning("Size mismatch in simon1demo MUS file (%ld versus reported %d)", (long) in->size() - 2, (int) size);
		_system->unlock_mutex(_mutex);
		return;
	}

	p->data = (byte *) calloc(size, 1);
	in->read(p->data, size);

	MidiParser *parser = MidiParser_createS1D();
	parser->setMidiDriver(this);
	parser->setTimerRate(_driver->getBaseTempo());
	if (!parser->loadMusic(p->data, size)) {
		warning("Error reading track!");
		delete parser;
		parser = 0;
	}

	if (!sfx) {
		_currentTrack = 255;
		resetVolumeTable();
	}
	p->parser = parser; // That plugs the power cord into the wall
	_system->unlock_mutex(_mutex);
}

} // End of namespace Simon