aboutsummaryrefslogtreecommitdiff
path: root/sound/softsynth/mt32.cpp
blob: 52e9589b50e323093485b9f0ab9663a5daff9b23 (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
/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001-2006 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 "common/scummsys.h"

#ifdef USE_MT32EMU

#include "sound/softsynth/mt32/mt32emu.h"

#include "sound/softsynth/emumidi.h"
#include "sound/mpu401.h"

#include "common/config-manager.h"
#include "common/events.h"
#include "common/file.h"
#include "common/system.h"
#include "common/util.h"

#include "graphics/fontman.h"
#include "graphics/surface.h"

class MidiChannel_MT32 : public MidiChannel_MPU401 {
	void effectLevel(byte value) { }
	void chorusLevel(byte value) { }
};

class MidiDriver_MT32 : public MidiDriver_Emulated {
private:
	Audio::SoundHandle _handle;
	MidiChannel_MT32 _midiChannels[16];
	uint16 _channelMask;
	MT32Emu::Synth *_synth;

	int _outputRate;

protected:
	void generateSamples(int16 *buf, int len);

public:
	bool _initialising;

	MidiDriver_MT32(Audio::Mixer *mixer);
	virtual ~MidiDriver_MT32();

	int open();
	void close();
	void send(uint32 b);
	void setPitchBendRange (byte channel, uint range);
	void sysEx(const byte *msg, uint16 length);

	uint32 property(int prop, uint32 param);
	MidiChannel *allocateChannel();
	MidiChannel *getPercussionChannel();

	// AudioStream API
	bool isStereo() const { return true; }
	int getRate() const { return _outputRate; }
};

class MT32File : public MT32Emu::File {
	Common::File file;
public:
	bool open(const char *filename, OpenMode mode) {
		Common::File::AccessMode accessMode = mode == OpenMode_read ? Common::File::kFileReadMode : Common::File::kFileWriteMode;
		return file.open(filename, accessMode);
	}
	void close() {
		return file.close();
	}
	size_t read(void *in, size_t size) {
		return file.read(in, size);
	}
	bool readLine(char *in, size_t size) {
		return file.readLine(in, size) != NULL;
	}
	bool readBit8u(MT32Emu::Bit8u *in) {
		byte b = file.readByte();
		if (file.eof())
			return false;
		*in = b;
		return true;
	}
	size_t write(const void *in, size_t size) {
		return file.write(in, size);
	}
	bool writeBit8u(MT32Emu::Bit8u out) {
		file.writeByte(out);
		return !file.ioFailed();
	}
	bool isEOF() {
		return file.eof();
	}
};

static int eatSystemEvents() {
	Common::Event event;
	Common::EventManager *eventMan = g_system->getEventManager();
	while (eventMan->pollEvent(event)) {
		switch (event.type) {
		case Common::EVENT_QUIT:
			return 1;
		default:
			break;
		}
	}
	return 0;
}

static void drawProgress(float progress) {
	const Graphics::Font &font(*FontMan.getFontByUsage(Graphics::FontManager::kOSDFont));
	Graphics::Surface surf;
	uint32 borderColor = 0x2;
	uint32 fillColor = 0x4;
	surf.w = g_system->getWidth() / 7 * 5;
	surf.h = font.getFontHeight();
	int x = g_system->getWidth() / 7;
	int y = g_system->getHeight() / 2 - surf.h / 2;
	surf.pitch = surf.w;
	surf.bytesPerPixel = 1;
	surf.pixels = calloc(surf.w, surf.h);
	Common::Rect r(surf.w, surf.h);
	surf.frameRect(r, borderColor);
	r.grow(-1);
	r.right = r.left + (uint16)(r.width() * progress);
	surf.fillRect(r, fillColor);
	g_system->copyRectToScreen((byte *)surf.pixels, surf.pitch, x, y, surf.w, surf.h);
	g_system->updateScreen();
	free(surf.pixels);
}

static void drawMessage(int offset, const Common::String &text) {
	const Graphics::Font &font(*FontMan.getFontByUsage(Graphics::FontManager::kOSDFont));
	Graphics::Surface surf;
	uint32 color = 0x2;
	surf.w = g_system->getWidth();
	surf.h = font.getFontHeight();
	surf.pitch = surf.w;
	surf.bytesPerPixel = 1;
	surf.pixels = calloc(surf.w, surf.h);
	font.drawString(&surf, text, 0, 0, surf.w, color, Graphics::kTextAlignCenter);
	int y = g_system->getHeight() / 2 - font.getFontHeight() / 2 + offset * (font.getFontHeight() + 1);
	g_system->copyRectToScreen((byte *)surf.pixels, surf.pitch, 0, y, surf.w, surf.h);
	g_system->updateScreen();
	free(surf.pixels);
}

static MT32Emu::File *MT32_OpenFile(void *userData, const char *filename, MT32Emu::File::OpenMode mode) {
	MT32File *file = new MT32File();
	if (!file->open(filename, mode)) {
		delete file;
		return NULL;
	}
	return file;
}

static void MT32_PrintDebug(void *userData, const char *fmt, va_list list) {
	char buf[512];
	if (((MidiDriver_MT32 *)userData)->_initialising) {
		vsnprintf(buf, 512, fmt, list);
		buf[70] = 0; // Truncate to a reasonable length
		drawMessage(1, buf);
	}
	//vdebug(0, fmt, list); // FIXME: Use a higher debug level
}

static int MT32_Report(void *userData, MT32Emu::ReportType type, const void *reportData) {
	switch(type) {
	case MT32Emu::ReportType_lcdMessage:
		g_system->displayMessageOnOSD((const char *)reportData);
		break;
	case MT32Emu::ReportType_errorControlROM:
		error("Failed to load MT32_CONTROL.ROM");
		break;
	case MT32Emu::ReportType_errorPCMROM:
		error("Failed to load MT32_PCM.ROM");
		break;
	case MT32Emu::ReportType_progressInit:
		if (((MidiDriver_MT32 *)userData)->_initialising) {
			drawProgress(*((const float *)reportData));
			return eatSystemEvents();
		}
		break;
	case MT32Emu::ReportType_availableSSE:
		debug(1, "MT32emu: SSE is available");
		break;
	case MT32Emu::ReportType_usingSSE:
		debug(1, "MT32emu: using SSE");
		break;
	case MT32Emu::ReportType_available3DNow:
		debug(1, "MT32emu: 3DNow! is available");
		break;
	case MT32Emu::ReportType_using3DNow:
		debug(1, "MT32emu: using 3DNow!");
		break;
	default:
		break;
	}
	return 0;
}

////////////////////////////////////////
//
// MidiDriver_MT32
//
////////////////////////////////////////

MidiDriver_MT32::MidiDriver_MT32(Audio::Mixer *mixer) : MidiDriver_Emulated(mixer) {
	_channelMask = 0xFFFF; // Permit all 16 channels by default
	uint i;
	for (i = 0; i < ARRAYSIZE(_midiChannels); ++i) {
		_midiChannels[i].init(this, i);
	}
	_synth = NULL;
	// A higher baseFreq reduces the length used in generateSamples(),
	// and means that the timer callback will be called more often.
	// That results in more accurate timing.
	_baseFreq = 10000;
	// Unfortunately bugs in the emulator cause inaccurate tuning
	// at rates other than 32KHz, thus we produce data at 32KHz and
	// rely on Mixer to convert.
	_outputRate = 32000; //_mixer->getOutputRate();
	_initialising = false;
}

MidiDriver_MT32::~MidiDriver_MT32() {
	if (_synth != NULL)
		delete _synth;
}

int MidiDriver_MT32::open() {
	MT32Emu::SynthProperties prop;

	if (_isOpen)
		return MERR_ALREADY_OPEN;

	MidiDriver_Emulated::open();

	memset(&prop, 0, sizeof(prop));
	prop.sampleRate = getRate();
	prop.useReverb = true;
	prop.useDefaultReverb = false;
	prop.reverbType = 0;
	prop.reverbTime = 5;
	prop.reverbLevel = 3;
	prop.userData = this;
	prop.printDebug = MT32_PrintDebug;
	prop.report = MT32_Report;
	prop.openFile = MT32_OpenFile;
	_synth = new MT32Emu::Synth();
	_initialising = true;
	const byte dummy_palette[] = {
		0, 0, 0, 0,
		0, 0, 171, 0,
		0, 171, 0, 0,
		0, 171, 171, 0,
		171, 0, 0, 0
	};

	g_system->setPalette(dummy_palette, 0, 5);
	drawMessage(-1, "Initialising MT-32 Emulator");
	if (!_synth->open(prop))
		return MERR_DEVICE_NOT_AVAILABLE;
	_initialising = false;
	g_system->clearScreen();
	g_system->updateScreen();
	_mixer->playInputStream(Audio::Mixer::kSFXSoundType, &_handle, this, -1, 255, 0, false, true);
	return 0;
}

void MidiDriver_MT32::send(uint32 b) {
	_synth->playMsg(b);
}

void MidiDriver_MT32::setPitchBendRange(byte channel, uint range) {
	if (range > 24) {
		printf("setPitchBendRange() called with range > 24: %d", range);
	}
	byte benderRangeSysex[9];
	benderRangeSysex[0] = 0x41; // Roland
	benderRangeSysex[1] = channel;
	benderRangeSysex[2] = 0x16; // MT-32
	benderRangeSysex[3] = 0x12; // Write
	benderRangeSysex[4] = 0x00;
	benderRangeSysex[5] = 0x00;
	benderRangeSysex[6] = 0x04;
	benderRangeSysex[7] = (byte)range;
	benderRangeSysex[8] = MT32Emu::Synth::calcSysexChecksum(&benderRangeSysex[4], 4, 0);
	sysEx(benderRangeSysex, 9);
}

void MidiDriver_MT32::sysEx(const byte *msg, uint16 length) {
	if (msg[0] == 0xf0) {
		_synth->playSysex(msg, length);
	} else {
		_synth->playSysexWithoutFraming(msg, length);
	}
}

void MidiDriver_MT32::close() {
	if (!_isOpen)
		return;
	_isOpen = false;

	// Detach the player callback handler
	setTimerCallback(NULL, NULL);
	// Detach the mixer callback handler
	_mixer->stopHandle(_handle);

	_synth->close();
	delete _synth;
	_synth = NULL;
}

void MidiDriver_MT32::generateSamples(int16 *data, int len) {
	_synth->render(data, len);
}

uint32 MidiDriver_MT32::property(int prop, uint32 param) {
	switch (prop) {
	case PROP_CHANNEL_MASK:
		_channelMask = param & 0xFFFF;
		return 1;
	}

	return 0;
}

MidiChannel *MidiDriver_MT32::allocateChannel() {
	MidiChannel_MT32 *chan;
	uint i;

	for (i = 0; i < ARRAYSIZE(_midiChannels); ++i) {
		if (i == 9 || !(_channelMask & (1 << i)))
			continue;
		chan = &_midiChannels[i];
		if (chan->allocate()) {
			return chan;
		}
	}
	return NULL;
}

MidiChannel *MidiDriver_MT32::getPercussionChannel() {
	return &_midiChannels[9];
}

// This code should be used when calling the timer callback from the mixer thread is undesirable.
// Note that it results in less accurate timing.
#if 0
class MidiEvent_MT32 {
public:
	MidiEvent_MT32 *_next;
	uint32 _msg; // 0xFFFFFFFF indicates a sysex message
	byte *_data;
	uint32 _len;

	MidiEvent_MT32(uint32 msg, byte *data, uint32 len) {
		_msg = msg;
		if (len > 0) {
			_data = new byte[len];
			memcpy(_data, data, len);
		}
		_len = len;
		_next = NULL;
	}

	MidiEvent_MT32() {
		if (_len > 0)
			delete _data;
	}
};

class MidiDriver_ThreadedMT32 : public MidiDriver_MT32 {
private:
	OSystem::Mutex _eventMutex;
	MidiEvent_MT32 *_events;
	TimerManager::TimerProc _timer_proc;

	void pushMidiEvent(MidiEvent_MT32 *event);
	MidiEvent_MT32 *popMidiEvent();

protected:
	void send(uint32 b);
	void sysEx(const byte *msg, uint16 length);

public:
	MidiDriver_ThreadedMT32(Audio::Mixer *mixer);

	void onTimer();
	void close();
	void setTimerCallback(void *timer_param, TimerManager::TimerProc timer_proc);
};


MidiDriver_ThreadedMT32::MidiDriver_ThreadedMT32(Audio::Mixer *mixer) : MidiDriver_MT32(mixer) {
	_events = NULL;
	_timer_proc = NULL;
}

void MidiDriver_ThreadedMT32::close() {
	MidiDriver_MT32::close();
	while ((popMidiEvent() != NULL)) {
		// Just eat any leftover events
	}
}

void MidiDriver_ThreadedMT32::setTimerCallback(void *timer_param, TimerManager::TimerProc timer_proc) {
	if (!_timer_proc || !timer_proc) {
		if (_timer_proc)
			_vm->_timer->removeTimerProc(_timer_proc);
		_timer_proc = timer_proc;
		if (timer_proc)
			_vm->_timer->installTimerProc(timer_proc, getBaseTempo(), timer_param);
	}
}

void MidiDriver_ThreadedMT32::pushMidiEvent(MidiEvent_MT32 *event) {
	Common::StackLock lock(_eventMutex);
	if (_events == NULL) {
		_events = event;
	} else {
		MidiEvent_MT32 *last = _events;
		while (last->_next != NULL)
			last = last->_next;
		last->_next = event;
	}
}

MidiEvent_MT32 *MidiDriver_ThreadedMT32::popMidiEvent() {
	Common::StackLock lock(_eventMutex);
	MidiEvent_MT32 *event;
	event = _events;
	if (event != NULL)
		_events = event->_next;
	return event;
}

void MidiDriver_ThreadedMT32::send(uint32 b) {
	MidiEvent_MT32 *event = new MidiEvent_MT32(b, NULL, 0);
	pushMidiEvent(event);
}

void MidiDriver_ThreadedMT32::sysEx(const byte *msg, uint16 length) {
	MidiEvent_MT32 *event = new MidiEvent_MT32(0xFFFFFFFF, msg, length);
	pushMidiEvent(event);
}

void MidiDriver_ThreadedMT32::onTimer() {
	MidiEvent_MT32 *event;
	while ((event = popMidiEvent()) != NULL) {
		if (event->_msg == 0xFFFFFFFF) {
			MidiDriver_MT32::sysEx(event->_data, event->_len);
		} else {
			MidiDriver_MT32::send(event->_msg);
		}
		delete event;
	}
}
#endif

////////////////////////////////////////
//
// MidiDriver_MT32 factory
//
////////////////////////////////////////

MidiDriver *MidiDriver_MT32_create(Audio::Mixer *mixer) {
	// HACK: It will stay here until engine plugin loader overhaul
	if (ConfMan.hasKey("extrapath"))
		Common::File::addDefaultDirectory(ConfMan.get("extrapath"));
	return new MidiDriver_MT32(mixer);
}

#endif