aboutsummaryrefslogtreecommitdiff
path: root/video/avi_decoder.cpp
blob: 757d2b740b203af57638b3851b5a0c042efdff5c (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
/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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/endian.h"
#include "common/file.h"
#include "common/stream.h"
#include "common/events.h"

#include "audio/audiostream.h"
#include "audio/mixer.h"

#include "video/avi_decoder.h"

// Audio Codecs
#include "audio/decoders/adpcm.h"
#include "audio/decoders/raw.h"

// Video Codecs
#include "video/codecs/cinepak.h"
#include "video/codecs/indeo3.h"
#include "video/codecs/msvideo1.h"
#include "video/codecs/msrle.h"
#include "video/codecs/truemotion1.h"

namespace Video {

/*
static byte char2num(char c) {
	return (c >= 48 && c <= 57) ? c - 48 : 0;
}

static byte getStreamNum(uint32 tag) {
	return char2num((char)(tag >> 24)) * 16 + char2num((char)(tag >> 16));
}
*/

static uint16 getStreamType(uint32 tag) {
	return tag & 0xffff;
}

AviDecoder::AviDecoder(Audio::Mixer *mixer, Audio::Mixer::SoundType soundType) : _mixer(mixer) {
	_soundType = soundType;

	_videoCodec = NULL;
	_decodedHeader = false;
	_audStream = NULL;
	_fileStream = NULL;
	_audHandle = new Audio::SoundHandle();
	_dirtyPalette = false;
	memset(_palette, 0, sizeof(_palette));
	memset(&_wvInfo, 0, sizeof(PCMWAVEFORMAT));
	memset(&_bmInfo, 0, sizeof(BITMAPINFOHEADER));
	memset(&_vidsHeader, 0, sizeof(AVIStreamHeader));
	memset(&_audsHeader, 0, sizeof(AVIStreamHeader));
	memset(&_ixInfo, 0, sizeof(AVIOLDINDEX));
}

AviDecoder::~AviDecoder() {
	close();
	delete _audHandle;
}

void AviDecoder::runHandle(uint32 tag) {
	assert (_fileStream);
	if (_fileStream->eos())
		return;

	debug (3, "Decoding tag %s", tag2str(tag));

	switch (tag) {
		case ID_RIFF:
			/*_filesize = */_fileStream->readUint32LE();
			if (_fileStream->readUint32BE() != ID_AVI)
				error("RIFF file is not an AVI video");
			break;
		case ID_LIST:
			handleList();
			break;
		case ID_AVIH:
			_header.size = _fileStream->readUint32LE();
			_header.microSecondsPerFrame = _fileStream->readUint32LE();
			_header.maxBytesPerSecond = _fileStream->readUint32LE();
			_header.padding = _fileStream->readUint32LE();
			_header.flags = _fileStream->readUint32LE();
			_header.totalFrames = _fileStream->readUint32LE();
			_header.initialFrames = _fileStream->readUint32LE();
			_header.streams = _fileStream->readUint32LE();
			_header.bufferSize = _fileStream->readUint32LE();
			_header.width = _fileStream->readUint32LE();
			_header.height = _fileStream->readUint32LE();
			//Ignore 16 bytes of reserved data
			_fileStream->skip(16);
			break;
		case ID_STRH:
			handleStreamHeader();
			break;
		case ID_STRD: // Extra stream info, safe to ignore
		case ID_VEDT: // Unknown, safe to ignore
		case ID_JUNK: // Alignment bytes, should be ignored
			{
			uint32 junkSize = _fileStream->readUint32LE();
			_fileStream->skip(junkSize + (junkSize & 1)); // Alignment
			} break;
		case ID_IDX1:
			_ixInfo.size = _fileStream->readUint32LE();
			_ixInfo.indices = new AVIOLDINDEX::Index[_ixInfo.size / 16];
			debug (0, "%d Indices", (_ixInfo.size / 16));
			for (uint32 i = 0; i < (_ixInfo.size / 16); i++) {
				_ixInfo.indices[i].id = _fileStream->readUint32BE();
				_ixInfo.indices[i].flags = _fileStream->readUint32LE();
				_ixInfo.indices[i].offset = _fileStream->readUint32LE();
				_ixInfo.indices[i].size = _fileStream->readUint32LE();
				debug (0, "Index %d == Tag \'%s\', Offset = %d, Size = %d", i, tag2str(_ixInfo.indices[i].id), _ixInfo.indices[i].offset, _ixInfo.indices[i].size);
			}
			break;
		default:
			error ("Unknown tag \'%s\' found", tag2str(tag));
	}
}

void AviDecoder::handleList() {
	uint32 listSize = _fileStream->readUint32LE() - 4; // Subtract away listType's 4 bytes
	uint32 listType = _fileStream->readUint32BE();
	uint32 curPos = _fileStream->pos();

	debug (0, "Found LIST of type %s", tag2str(listType));

	while ((_fileStream->pos() - curPos) < listSize)
		runHandle(_fileStream->readUint32BE());

	// We now have all the header data
	if (listType == ID_HDRL)
		_decodedHeader = true;
}

void AviDecoder::handleStreamHeader() {
	AVIStreamHeader sHeader;
	sHeader.size = _fileStream->readUint32LE();
	sHeader.streamType = _fileStream->readUint32BE();
	if (sHeader.streamType == ID_MIDS || sHeader.streamType == ID_TXTS)
		error ("Unhandled MIDI/Text stream");
	sHeader.streamHandler = _fileStream->readUint32BE();
	sHeader.flags = _fileStream->readUint32LE();
	sHeader.priority = _fileStream->readUint16LE();
	sHeader.language = _fileStream->readUint16LE();
	sHeader.initialFrames = _fileStream->readUint32LE();
	sHeader.scale = _fileStream->readUint32LE();
	sHeader.rate = _fileStream->readUint32LE();
	sHeader.start = _fileStream->readUint32LE();
	sHeader.length = _fileStream->readUint32LE();
	sHeader.bufferSize = _fileStream->readUint32LE();
	sHeader.quality = _fileStream->readUint32LE();
	sHeader.sampleSize = _fileStream->readUint32LE();

	_fileStream->skip(sHeader.size - 48); // Skip over the remainder of the chunk (frame)

	if (_fileStream->readUint32BE() != ID_STRF)
		error("Could not find STRF tag");
	uint32 strfSize = _fileStream->readUint32LE();
	uint32 startPos = _fileStream->pos();

	if (sHeader.streamType == ID_VIDS) {
		_vidsHeader = sHeader;

		_bmInfo.size = _fileStream->readUint32LE();
		_bmInfo.width = _fileStream->readUint32LE();
		assert (_header.width == _bmInfo.width);
		_bmInfo.height = _fileStream->readUint32LE();
		assert (_header.height == _bmInfo.height);
		_bmInfo.planes = _fileStream->readUint16LE();
		_bmInfo.bitCount = _fileStream->readUint16LE();
		_bmInfo.compression = _fileStream->readUint32BE();
		_bmInfo.sizeImage = _fileStream->readUint32LE();
		_bmInfo.xPelsPerMeter = _fileStream->readUint32LE();
		_bmInfo.yPelsPerMeter = _fileStream->readUint32LE();
		_bmInfo.clrUsed = _fileStream->readUint32LE();
		_bmInfo.clrImportant = _fileStream->readUint32LE();

		if (_bmInfo.bitCount == 8) {
			if (_bmInfo.clrUsed == 0)
				_bmInfo.clrUsed = 256;

			for (uint32 i = 0; i < _bmInfo.clrUsed; i++) {
				_palette[i * 3 + 2] = _fileStream->readByte();
				_palette[i * 3 + 1] = _fileStream->readByte();
				_palette[i * 3] = _fileStream->readByte();
				_fileStream->readByte();
			}

			_dirtyPalette = true;
		}

		if (!_vidsHeader.streamHandler)
			_vidsHeader.streamHandler = _bmInfo.compression;
	} else if (sHeader.streamType == ID_AUDS) {
		_audsHeader = sHeader;

		_wvInfo.tag = _fileStream->readUint16LE();
		_wvInfo.channels = _fileStream->readUint16LE();
		_wvInfo.samplesPerSec = _fileStream->readUint32LE();
		_wvInfo.avgBytesPerSec = _fileStream->readUint32LE();
		_wvInfo.blockAlign = _fileStream->readUint16LE();
		_wvInfo.size = _fileStream->readUint16LE();

		// AVI seems to treat the sampleSize as including the second
		// channel as well, so divide for our sake.
		if (_wvInfo.channels == 2)
			_audsHeader.sampleSize /= 2;
	}

	// Ensure that we're at the end of the chunk
	_fileStream->seek(startPos + strfSize);
}

bool AviDecoder::loadStream(Common::SeekableReadStream *stream) {
	close();

	_fileStream = stream;
	_decodedHeader = false;

	// Read chunks until we have decoded the header
	while (!_decodedHeader)
		runHandle(_fileStream->readUint32BE());

	uint32 nextTag = _fileStream->readUint32BE();

	// Throw out any JUNK section
	if (nextTag == ID_JUNK) {
		runHandle(ID_JUNK);
		nextTag = _fileStream->readUint32BE();
	}

	// Ignore the 'movi' LIST
	if (nextTag == ID_LIST) {
		_fileStream->readUint32BE(); // Skip size
		if (_fileStream->readUint32BE() != ID_MOVI)
			error ("Expected 'movi' LIST");
	} else
		error ("Expected 'movi' LIST");

	// Now, create the codec
	_videoCodec = createCodec();

	// Initialize the video stuff too
	_audStream = createAudioStream();
	if (_audStream)
		_mixer->playStream(_soundType, _audHandle, _audStream);

	debug (0, "Frames = %d, Dimensions = %d x %d", _header.totalFrames, _header.width, _header.height);
	debug (0, "Frame Rate = %d", _vidsHeader.rate / _vidsHeader.scale);
	if (_wvInfo.samplesPerSec != 0)
		debug (0, "Sound Rate = %d", _wvInfo.samplesPerSec);
	debug (0, "Video Codec = \'%s\'", tag2str(_vidsHeader.streamHandler));

	if (!_videoCodec)
		return false;

	return true;
}

void AviDecoder::close() {
	if (!_fileStream)
		return;

	delete _fileStream;
	_fileStream = 0;

	// Deinitialize sound
	_mixer->stopHandle(*_audHandle);
	_audStream = 0;

	_decodedHeader = false;

	delete _videoCodec;
	_videoCodec = 0;

	delete[] _ixInfo.indices;
	_ixInfo.indices = 0;

	memset(_palette, 0, sizeof(_palette));
	memset(&_wvInfo, 0, sizeof(PCMWAVEFORMAT));
	memset(&_bmInfo, 0, sizeof(BITMAPINFOHEADER));
	memset(&_vidsHeader, 0, sizeof(AVIStreamHeader));
	memset(&_audsHeader, 0, sizeof(AVIStreamHeader));
	memset(&_ixInfo, 0, sizeof(AVIOLDINDEX));

	reset();
}

uint32 AviDecoder::getElapsedTime() const {
	if (_audStream)
		return _mixer->getSoundElapsedTime(*_audHandle);

	return FixedRateVideoDecoder::getElapsedTime();
}

const Graphics::Surface *AviDecoder::decodeNextFrame() {
	uint32 nextTag = _fileStream->readUint32BE();

	if (_fileStream->eos())
		return NULL;

	if (_curFrame == -1)
		_startTime = g_system->getMillis();

	if (nextTag == ID_LIST) {
		// A list of audio/video chunks
		uint32 listSize = _fileStream->readUint32LE() - 4;
		int32 startPos = _fileStream->pos();

		if (_fileStream->readUint32BE() != ID_REC)
			error ("Expected 'rec ' LIST");

		// Decode chunks in the list and see if we get a frame
		const Graphics::Surface *frame = NULL;
		while (_fileStream->pos() < startPos + (int32)listSize) {
			const Graphics::Surface *temp = decodeNextFrame();
			if (temp)
				frame = temp;
		}

		return frame;
	} else if (getStreamType(nextTag) == 'wb') {
		// Audio Chunk
		uint32 chunkSize = _fileStream->readUint32LE();
		queueAudioBuffer(chunkSize);
		_fileStream->skip(chunkSize & 1); // Alignment
	} else if (getStreamType(nextTag) == 'dc' || getStreamType(nextTag) == 'id' ||
	           getStreamType(nextTag) == 'AM' || getStreamType(nextTag) == '32') {
		// Compressed Frame
		_curFrame++;
		uint32 chunkSize = _fileStream->readUint32LE();

		if (chunkSize == 0) // Keep last frame on screen
			return NULL;

		Common::SeekableReadStream *frameData = _fileStream->readStream(chunkSize);
		const Graphics::Surface *surface = _videoCodec->decodeImage(frameData);
		delete frameData;
		_fileStream->skip(chunkSize & 1); // Alignment
		return surface;
	} else if (getStreamType(nextTag) == 'pc') {
		// Palette Change
		_fileStream->readUint32LE(); // Chunk size, not needed here
		byte firstEntry = _fileStream->readByte();
		uint16 numEntries = _fileStream->readByte();
		_fileStream->readUint16LE(); // Reserved

		// 0 entries means all colors are going to be changed
		if (numEntries == 0)
			numEntries = 256;

		for (uint16 i = firstEntry; i < numEntries + firstEntry; i++) {
			_palette[i * 3] = _fileStream->readByte();
			_palette[i * 3 + 1] = _fileStream->readByte();
			_palette[i * 3 + 2] = _fileStream->readByte();
			_fileStream->readByte(); // Flags that don't serve us any purpose
		}

		_dirtyPalette = true;

		// No alignment necessary. It's always even.
	} else if (nextTag == ID_JUNK) {
		runHandle(ID_JUNK);
	} else if (nextTag == ID_IDX1) {
		runHandle(ID_IDX1);
	} else
		error("Tag = \'%s\', %d", tag2str(nextTag), _fileStream->pos());

	return NULL;
}

Codec *AviDecoder::createCodec() {
	switch (_vidsHeader.streamHandler) {
		case ID_CRAM:
		case ID_MSVC:
		case ID_WHAM:
			return new MSVideo1Decoder(_bmInfo.width, _bmInfo.height, _bmInfo.bitCount);
		case ID_RLE:
			return new MSRLEDecoder(_bmInfo.width, _bmInfo.height, _bmInfo.bitCount);
		case ID_CVID:
			return new CinepakDecoder(_bmInfo.bitCount);
#ifdef USE_INDEO3
		case ID_IV32:
			return new Indeo3Decoder(_bmInfo.width, _bmInfo.height);
#endif
#ifdef GRAPHICS_TRUEMOTION1_H
		case ID_DUCK:
			return new TrueMotion1Decoder(_bmInfo.width, _bmInfo.height);
#endif
		default:
			warning ("Unknown/Unhandled compression format \'%s\'", tag2str(_vidsHeader.streamHandler));
	}

	return NULL;
}

Graphics::PixelFormat AviDecoder::getPixelFormat() const {
	assert(_videoCodec);
	return _videoCodec->getPixelFormat();
}

Audio::QueuingAudioStream *AviDecoder::createAudioStream() {
	if (_wvInfo.tag == kWaveFormatPCM || _wvInfo.tag == kWaveFormatDK3)
		return Audio::makeQueuingAudioStream(_wvInfo.samplesPerSec, _wvInfo.channels == 2);
	else if (_wvInfo.tag != kWaveFormatNone) // No sound
		warning("Unsupported AVI audio format %d", _wvInfo.tag);

	return NULL;
}

void AviDecoder::queueAudioBuffer(uint32 chunkSize) {
	// Return if we haven't created the queue (unsupported audio format)
	if (!_audStream) {
		_fileStream->skip(chunkSize);
		return;
	}

	Common::SeekableReadStream *stream = _fileStream->readStream(chunkSize);

	if (_wvInfo.tag == kWaveFormatPCM) {
		byte flags = 0;
		if (_audsHeader.sampleSize == 2)
			flags |= Audio::FLAG_16BITS | Audio::FLAG_LITTLE_ENDIAN;
		else
			flags |= Audio::FLAG_UNSIGNED;

		if (_wvInfo.channels == 2)
			flags |= Audio::FLAG_STEREO;

		_audStream->queueAudioStream(Audio::makeRawStream(stream, _wvInfo.samplesPerSec, flags, DisposeAfterUse::YES), DisposeAfterUse::YES);
	} else if (_wvInfo.tag == kWaveFormatDK3) {
		_audStream->queueAudioStream(Audio::makeADPCMStream(stream, DisposeAfterUse::YES, chunkSize, Audio::kADPCMDK3, _wvInfo.samplesPerSec, _wvInfo.channels, _wvInfo.blockAlign), DisposeAfterUse::YES);
	}
}

} // End of namespace Video