FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/electronicarts.c
Date: 2024-04-27 00:58:15
Exec Total Coverage
Lines: 367 457 80.3%
Functions: 12 12 100.0%
Branches: 162 238 68.1%
Line Branch Exec Source
1 /* Electronic Arts Multimedia File Demuxer
2 * Copyright (c) 2004 The FFmpeg project
3 * Copyright (c) 2006-2008 Peter Ross
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Electronic Arts Multimedia file demuxer (WVE/UV2/etc.)
25 * by Robin Kay (komadori at gekkou.co.uk)
26 */
27
28 #include <inttypes.h>
29
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/opt.h"
32 #include "avformat.h"
33 #include "demux.h"
34 #include "internal.h"
35
36 #define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
37 #define SEAD_TAG MKTAG('S', 'E', 'A', 'D') /* Sxxx header */
38 #define SNDC_TAG MKTAG('S', 'N', 'D', 'C') /* Sxxx data */
39 #define SEND_TAG MKTAG('S', 'E', 'N', 'D') /* Sxxx end */
40 #define SHEN_TAG MKTAG('S', 'H', 'E', 'N') /* SxEN header */
41 #define SDEN_TAG MKTAG('S', 'D', 'E', 'N') /* SxEN data */
42 #define SEEN_TAG MKTAG('S', 'E', 'E', 'N') /* SxEN end */
43 #define ISNh_TAG MKTAG('1', 'S', 'N', 'h') /* 1SNx header */
44 #define EACS_TAG MKTAG('E', 'A', 'C', 'S')
45 #define ISNd_TAG MKTAG('1', 'S', 'N', 'd') /* 1SNx data */
46 #define ISNe_TAG MKTAG('1', 'S', 'N', 'e') /* 1SNx end */
47 #define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
48 #define GSTR_TAG MKTAG('G', 'S', 'T', 'R')
49 #define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
50 #define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
51 #define kVGT_TAG MKTAG('k', 'V', 'G', 'T') /* TGV I-frame */
52 #define fVGT_TAG MKTAG('f', 'V', 'G', 'T') /* TGV P-frame */
53 #define mTCD_TAG MKTAG('m', 'T', 'C', 'D') /* MDEC */
54 #define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD I-frame */
55 #define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD P-frame */
56 #define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
57 #define MPCh_TAG MKTAG('M', 'P', 'C', 'h') /* MPEG-2 */
58 #define TGQs_TAG MKTAG('T', 'G', 'Q', 's') /* TGQ I-frame (appears in .TGQ files) */
59 #define pQGT_TAG MKTAG('p', 'Q', 'G', 'T') /* TGQ I-frame (appears in .UV files) */
60 #define pIQT_TAG MKTAG('p', 'I', 'Q', 'T') /* TQI/UV2 I-frame (.UV2/.WVE) */
61 #define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
62 #define MV0K_TAG MKTAG('M', 'V', '0', 'K')
63 #define MV0F_TAG MKTAG('M', 'V', '0', 'F')
64 #define AVhd_TAG MKTAG('A', 'V', 'h', 'd')
65 #define AV0K_TAG MKTAG('A', 'V', '0', 'K')
66 #define AV0F_TAG MKTAG('A', 'V', '0', 'F')
67 #define MVIh_TAG MKTAG('M', 'V', 'I', 'h') /* CMV header */
68 #define MVIf_TAG MKTAG('M', 'V', 'I', 'f') /* CMV I-frame */
69 #define AVP6_TAG MKTAG('A', 'V', 'P', '6')
70
71 typedef struct VideoProperties {
72 enum AVCodecID codec;
73 AVRational time_base;
74 int width, height;
75 int nb_frames;
76 int stream_index;
77 } VideoProperties;
78
79 typedef struct EaDemuxContext {
80 const AVClass *class;
81
82 int big_endian;
83
84 VideoProperties video, alpha;
85
86 enum AVCodecID audio_codec;
87 int audio_stream_index;
88
89 int bytes;
90 int sample_rate;
91 int num_channels;
92 int num_samples;
93
94 int platform;
95 int merge_alpha;
96 } EaDemuxContext;
97
98 64 static uint32_t read_arbitrary(AVIOContext *pb)
99 {
100 uint8_t size, byte;
101 int i;
102 uint32_t word;
103
104 64 size = avio_r8(pb);
105
106 64 word = 0;
107
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 182 for (i = 0; i < size; i++) {
108 118 byte = avio_r8(pb);
109 118 word <<= 8;
110 118 word |= byte;
111 }
112
113 64 return word;
114 }
115
116 9 static int process_audio_header_elements(AVFormatContext *s)
117 {
118 9 EaDemuxContext *ea = s->priv_data;
119 9 AVIOContext *pb = s->pb;
120 9 int in_header = 1;
121 9 int compression_type = -1, revision = -1, revision2 = -1;
122
123 9 ea->bytes = 2;
124 9 ea->sample_rate = -1;
125 9 ea->num_channels = 1;
126
127
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 44 while (!avio_feof(pb) && in_header) {
128 int in_subheader;
129 uint8_t byte;
130 35 byte = avio_r8(pb);
131
132
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 35 switch (byte) {
133 9 case 0xFD:
134 9 av_log(s, AV_LOG_DEBUG, "entered audio subheader\n");
135 9 in_subheader = 1;
136
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 56 while (!avio_feof(pb) && in_subheader) {
137 uint8_t subbyte;
138 47 subbyte = avio_r8(pb);
139
140
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 47 switch (subbyte) {
141 5 case 0x80:
142 5 revision = read_arbitrary(pb);
143 5 av_log(s, AV_LOG_DEBUG,
144 "revision (element 0x80) set to 0x%08x\n", revision);
145 5 break;
146 9 case 0x82:
147 9 ea->num_channels = read_arbitrary(pb);
148 9 av_log(s, AV_LOG_DEBUG,
149 "num_channels (element 0x82) set to 0x%08x\n",
150 ea->num_channels);
151 9 break;
152 4 case 0x83:
153 4 compression_type = read_arbitrary(pb);
154 4 av_log(s, AV_LOG_DEBUG,
155 "compression_type (element 0x83) set to 0x%08x\n",
156 compression_type);
157 4 break;
158 5 case 0x84:
159 5 ea->sample_rate = read_arbitrary(pb);
160 5 av_log(s, AV_LOG_DEBUG,
161 "sample_rate (element 0x84) set to %i\n",
162 ea->sample_rate);
163 5 break;
164 9 case 0x85:
165 9 ea->num_samples = read_arbitrary(pb);
166 9 av_log(s, AV_LOG_DEBUG,
167 "num_samples (element 0x85) set to 0x%08x\n",
168 ea->num_samples);
169 9 break;
170 4 case 0x8A:
171 4 av_log(s, AV_LOG_DEBUG,
172 "element 0x%02x set to 0x%08"PRIx32"\n",
173 subbyte, read_arbitrary(pb));
174 4 av_log(s, AV_LOG_DEBUG, "exited audio subheader\n");
175 4 in_subheader = 0;
176 4 break;
177 2 case 0xA0:
178 2 revision2 = read_arbitrary(pb);
179 2 av_log(s, AV_LOG_DEBUG,
180 "revision2 (element 0xA0) set to 0x%08x\n",
181 revision2);
182 2 break;
183 5 case 0xFF:
184 5 av_log(s, AV_LOG_DEBUG,
185 "end of header block reached (within audio subheader)\n");
186 5 in_subheader = 0;
187 5 in_header = 0;
188 5 break;
189 4 default:
190 4 av_log(s, AV_LOG_DEBUG,
191 "element 0x%02x set to 0x%08"PRIx32"\n",
192 subbyte, read_arbitrary(pb));
193 4 break;
194 }
195 }
196 9 break;
197 4 case 0xFF:
198 4 av_log(s, AV_LOG_DEBUG, "end of header block reached\n");
199 4 in_header = 0;
200 4 break;
201 22 default:
202 22 av_log(s, AV_LOG_DEBUG,
203 "header element 0x%02x set to 0x%08"PRIx32"\n",
204 byte, read_arbitrary(pb));
205 22 break;
206 }
207 }
208
209
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 9 switch (compression_type) {
210 ✗ case 0:
211 ✗ ea->audio_codec = AV_CODEC_ID_PCM_S16LE;
212 ✗ break;
213 4 case 7:
214 4 ea->audio_codec = AV_CODEC_ID_ADPCM_EA;
215 4 break;
216
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 5 case -1:
217 switch (revision) {
218 3 case 1:
219 3 ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R1;
220 3 break;
221 ✗ case 2:
222 ✗ ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R2;
223 ✗ break;
224 2 case 3:
225 2 ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R3;
226 2 break;
227 ✗ case -1:
228 ✗ break;
229 ✗ default:
230 ✗ avpriv_request_sample(s, "stream type; revision=%i", revision);
231 ✗ return 0;
232 }
233 switch (revision2) {
234 1 case 8:
235 1 ea->audio_codec = AV_CODEC_ID_PCM_S16LE_PLANAR;
236 1 break;
237
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 1 case 10:
238 switch (revision) {
239 ✗ case -1:
240 ✗ case 2: ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R1; break;
241 1 case 3: ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R2; break;
242 ✗ default:
243 ✗ avpriv_request_sample(s, "stream type; revision=%i, revision2=%i", revision, revision2);
244 ✗ return 0;
245 }
246 1 break;
247 ✗ case 15:
248 case 16:
249 ✗ ea->audio_codec = AV_CODEC_ID_MP3;
250 ✗ break;
251 3 case -1:
252 3 break;
253 ✗ default:
254 ✗ ea->audio_codec = AV_CODEC_ID_NONE;
255 ✗ avpriv_request_sample(s, "stream type; revision2=%i", revision2);
256 ✗ return 0;
257 }
258 5 break;
259 ✗ default:
260 ✗ avpriv_request_sample(s,
261 "stream type; compression_type=%i",
262 compression_type);
263 ✗ return 0;
264 }
265
266
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 9 if (ea->audio_codec == AV_CODEC_ID_NONE && ea->platform == 0x01)
267 ✗ ea->audio_codec = AV_CODEC_ID_ADPCM_PSX;
268
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 9 if (ea->sample_rate == -1)
269
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 4 ea->sample_rate = revision == 3 ? 48000 : 22050;
270
271 9 return 1;
272 }
273
274 3 static void process_audio_header_eacs(AVFormatContext *s)
275 {
276 3 EaDemuxContext *ea = s->priv_data;
277 3 AVIOContext *pb = s->pb;
278 int compression_type;
279
280
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 3 ea->sample_rate = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb);
281 3 ea->bytes = avio_r8(pb); /* 1=8-bit, 2=16-bit */
282 3 ea->num_channels = avio_r8(pb);
283 3 compression_type = avio_r8(pb);
284 3 avio_skip(pb, 13);
285
286
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 3 switch (compression_type) {
287 ✗ case 0:
288 ✗ switch (ea->bytes) {
289 ✗ case 1:
290 ✗ ea->audio_codec = AV_CODEC_ID_PCM_S8;
291 ✗ break;
292 ✗ case 2:
293 ✗ ea->audio_codec = AV_CODEC_ID_PCM_S16LE;
294 ✗ break;
295 }
296 ✗ break;
297 1 case 1:
298 1 ea->audio_codec = AV_CODEC_ID_PCM_MULAW;
299 1 ea->bytes = 1;
300 1 break;
301 2 case 2:
302 2 ea->audio_codec = AV_CODEC_ID_ADPCM_IMA_EA_EACS;
303 2 break;
304 ✗ default:
305 ✗ avpriv_request_sample(s,
306 "stream type; audio compression_type=%i",
307 compression_type);
308 }
309 3 }
310
311 2 static void process_audio_header_sead(AVFormatContext *s)
312 {
313 2 EaDemuxContext *ea = s->priv_data;
314 2 AVIOContext *pb = s->pb;
315
316 2 ea->sample_rate = avio_rl32(pb);
317 2 ea->bytes = avio_rl32(pb); /* 1=8-bit, 2=16-bit */
318 2 ea->num_channels = avio_rl32(pb);
319 2 ea->audio_codec = AV_CODEC_ID_ADPCM_IMA_EA_SEAD;
320 2 }
321
322 2 static void process_video_header_mdec(AVFormatContext *s, VideoProperties *video)
323 {
324 2 AVIOContext *pb = s->pb;
325 2 avio_skip(pb, 4);
326 2 video->width = avio_rl16(pb);
327 2 video->height = avio_rl16(pb);
328 2 video->time_base = (AVRational) { 1, 15 };
329 2 video->codec = AV_CODEC_ID_MDEC;
330 2 }
331
332 5 static int process_video_header_vp6(AVFormatContext *s, VideoProperties *video)
333 {
334 5 AVIOContext *pb = s->pb;
335
336 5 avio_skip(pb, 8);
337 5 video->nb_frames = avio_rl32(pb);
338 5 avio_skip(pb, 4);
339 5 video->time_base.den = avio_rl32(pb);
340 5 video->time_base.num = avio_rl32(pb);
341
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 5 if (video->time_base.den <= 0 || video->time_base.num <= 0) {
342 ✗ av_log(s, AV_LOG_ERROR, "Timebase is invalid\n");
343 ✗ return AVERROR_INVALIDDATA;
344 }
345 5 video->codec = AV_CODEC_ID_VP6;
346
347 5 return 1;
348 }
349
350 1 static void process_video_header_cmv(AVFormatContext *s, VideoProperties *video)
351 {
352 int fps;
353
354 1 avio_skip(s->pb, 10);
355 1 fps = avio_rl16(s->pb);
356
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 1 if (fps)
357 1 video->time_base = (AVRational) { 1, fps };
358 1 video->codec = AV_CODEC_ID_CMV;
359 1 }
360
361 /* Process EA file header.
362 * Return 1 if the EA file is valid and successfully opened, 0 otherwise. */
363 18 static int process_ea_header(AVFormatContext *s)
364 {
365 18 uint32_t blockid, size = 0;
366 18 EaDemuxContext *ea = s->priv_data;
367 18 AVIOContext *pb = s->pb;
368 int i;
369
370
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 67 for (i = 0; i < 5 && (!ea->audio_codec || !ea->video.codec); i++) {
371 49 uint64_t startpos = avio_tell(pb);
372 49 int err = 0;
373
374 49 blockid = avio_rl32(pb);
375 49 size = avio_rl32(pb);
376
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 49 if (i == 0)
377 18 ea->big_endian = size > av_bswap32(size);
378
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 49 if (ea->big_endian)
379 3 size = av_bswap32(size);
380
381
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 49 if (size < 8) {
382 ✗ av_log(s, AV_LOG_ERROR, "chunk size too small\n");
383 ✗ return AVERROR_INVALIDDATA;
384 }
385
386
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 49 switch (blockid) {
387 3 case ISNh_TAG:
388
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 3 if (avio_rl32(pb) != EACS_TAG) {
389 ✗ avpriv_request_sample(s, "unknown 1SNh headerid");
390 ✗ return 0;
391 }
392 3 process_audio_header_eacs(s);
393 33 break;
394
395 9 case SCHl_TAG:
396 case SHEN_TAG:
397 9 blockid = avio_rl32(pb);
398
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 9 if (blockid == GSTR_TAG) {
399 1 avio_skip(pb, 4);
400
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 8 } else if ((blockid & 0xFF) != (PT00_TAG & 0xFF)) {
401 ✗ blockid = avio_rl32(pb);
402 }
403 9 ea->platform = (blockid >> 16) & 0xFF;
404 9 err = process_audio_header_elements(s);
405 9 break;
406
407 2 case SEAD_TAG:
408 2 process_audio_header_sead(s);
409 2 break;
410
411 1 case MVIh_TAG:
412 1 process_video_header_cmv(s, &ea->video);
413 1 break;
414
415 4 case kVGT_TAG:
416 4 ea->video.codec = AV_CODEC_ID_TGV;
417 4 break;
418
419 2 case mTCD_TAG:
420 2 process_video_header_mdec(s, &ea->video);
421 2 break;
422
423 1 case MPCh_TAG:
424 1 ea->video.codec = AV_CODEC_ID_MPEG2VIDEO;
425 1 break;
426
427 1 case pQGT_TAG:
428 case TGQs_TAG:
429 1 ea->video.codec = AV_CODEC_ID_TGQ;
430 1 ea->video.time_base = (AVRational) { 1, 15 };
431 1 break;
432
433 2 case pIQT_TAG:
434 2 ea->video.codec = AV_CODEC_ID_TQI;
435 2 ea->video.time_base = (AVRational) { 1, 15 };
436 2 break;
437
438 3 case MADk_TAG:
439 3 ea->video.codec = AV_CODEC_ID_MAD;
440 3 avio_skip(pb, 6);
441 3 ea->video.time_base = (AVRational) { avio_rl16(pb), 1000 };
442 3 break;
443
444 4 case MVhd_TAG:
445 4 err = process_video_header_vp6(s, &ea->video);
446 4 break;
447
448 1 case AVhd_TAG:
449 1 err = process_video_header_vp6(s, &ea->alpha);
450
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 1 if (err >= 0 && ea->video.codec == AV_CODEC_ID_VP6 && ea->merge_alpha) {
451 ✗ ea->alpha.codec = 0;
452 ✗ ea->video.codec = AV_CODEC_ID_VP6A;
453 }
454 1 break;
455 }
456
457
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 49 if (err < 0) {
458 ✗ av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
459 ✗ return err;
460 }
461
462 49 avio_seek(pb, startpos + size, SEEK_SET);
463 }
464
465 18 avio_seek(pb, 0, SEEK_SET);
466
467 18 return 1;
468 }
469
470 7128 static int ea_probe(const AVProbeData *p)
471 {
472 unsigned big_endian, size;
473
474
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 7128 switch (AV_RL32(&p->buf[0])) {
475 18 case ISNh_TAG:
476 case SCHl_TAG:
477 case SEAD_TAG:
478 case SHEN_TAG:
479 case kVGT_TAG:
480 case MADk_TAG:
481 case MPCh_TAG:
482 case MVhd_TAG:
483 case MVIh_TAG:
484 case AVP6_TAG:
485 18 break;
486 7110 default:
487 7110 return 0;
488 }
489 18 size = AV_RL32(&p->buf[4]);
490 18 big_endian = size > 0x000FFFFF;
491
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 18 if (big_endian)
492 1 size = av_bswap32(size);
493
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 18 if (size > 0xfffff || size < 8)
494 ✗ return 0;
495
496 18 return AVPROBE_SCORE_MAX;
497 }
498
499 36 static int init_video_stream(AVFormatContext *s, VideoProperties *video)
500 {
501 AVStream *st;
502
503
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 36 if (!video->codec)
504 17 return 0;
505
506 /* initialize the video decoder stream */
507 19 st = avformat_new_stream(s, NULL);
508
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 19 if (!st)
509 ✗ return AVERROR(ENOMEM);
510 19 video->stream_index = st->index;
511 19 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
512 19 st->codecpar->codec_id = video->codec;
513 // parsing is necessary to make FFmpeg generate correct timestamps
514
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 19 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO)
515 1 ffstream(st)->need_parsing = AVSTREAM_PARSE_HEADERS;
516 19 st->codecpar->codec_tag = 0; /* no fourcc */
517 19 st->codecpar->width = video->width;
518 19 st->codecpar->height = video->height;
519 19 st->duration = st->nb_frames = video->nb_frames;
520
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 19 if (video->time_base.num)
521 14 avpriv_set_pts_info(st, 64, video->time_base.num, video->time_base.den);
522 19 st->r_frame_rate =
523 19 st->avg_frame_rate = av_inv_q(video->time_base);
524 19 return 0;
525 }
526
527 18 static int ea_read_header(AVFormatContext *s)
528 {
529 18 EaDemuxContext *ea = s->priv_data;
530 AVStream *st;
531
532
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 18 if (process_ea_header(s)<=0)
533 ✗ return AVERROR(EIO);
534
535
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 18 if (init_video_stream(s, &ea->video) || init_video_stream(s, &ea->alpha))
536 ✗ return AVERROR(ENOMEM);
537
538
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 18 if (ea->audio_codec) {
539
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 14 if (ea->num_channels <= 0 || ea->num_channels > 2) {
540 ✗ av_log(s, AV_LOG_WARNING,
541 "Unsupported number of channels: %d\n", ea->num_channels);
542 ✗ goto no_audio;
543 }
544
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 14 if (ea->sample_rate <= 0) {
545 ✗ av_log(s, AV_LOG_ERROR,
546 "Unsupported sample rate: %d\n", ea->sample_rate);
547 ✗ goto no_audio;
548 }
549
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 14 if (ea->bytes <= 0 || ea->bytes > 2) {
550 ✗ av_log(s, AV_LOG_ERROR,
551 "Invalid number of bytes per sample: %d\n", ea->bytes);
552 ✗ goto no_audio;
553 }
554
555 /* initialize the audio decoder stream */
556 14 st = avformat_new_stream(s, NULL);
557
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 14 if (!st)
558 ✗ return AVERROR(ENOMEM);
559 14 avpriv_set_pts_info(st, 33, 1, ea->sample_rate);
560 14 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
561 14 st->codecpar->codec_id = ea->audio_codec;
562 14 st->codecpar->codec_tag = 0; /* no tag */
563 14 st->codecpar->ch_layout.nb_channels = ea->num_channels;
564 14 st->codecpar->sample_rate = ea->sample_rate;
565 14 st->codecpar->bits_per_coded_sample = ea->bytes * 8;
566 14 st->codecpar->bit_rate = (int64_t)ea->num_channels *
567 14 st->codecpar->sample_rate *
568 14 st->codecpar->bits_per_coded_sample / 4;
569 14 st->codecpar->block_align = ea->num_channels *
570 14 st->codecpar->bits_per_coded_sample;
571 14 ea->audio_stream_index = st->index;
572 14 st->start_time = 0;
573 14 return 0;
574 }
575 4 no_audio:
576 4 ea->audio_codec = AV_CODEC_ID_NONE;
577
578
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 4 if (!ea->video.codec)
579 ✗ return AVERROR_INVALIDDATA;
580 4 return 0;
581 }
582
583 3390 static int ea_read_packet(AVFormatContext *s, AVPacket *pkt)
584 {
585 3390 EaDemuxContext *ea = s->priv_data;
586 3390 AVIOContext *pb = s->pb;
587 3390 int partial_packet = 0;
588 3390 int hit_end = 0;
589 unsigned int chunk_type, chunk_size;
590 3390 int ret = 0, packet_read = 0, key = 0, vp6a;
591 3390 int av_uninit(num_samples);
592
593
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 6795 while ((!packet_read && !hit_end) || partial_packet) {
594 3421 chunk_type = avio_rl32(pb);
595
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 3421 if (avio_feof(pb))
596 16 return AVERROR_EOF;
597
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 3405 chunk_size = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb);
598
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 3405 if (chunk_size < 8)
599 ✗ return AVERROR_INVALIDDATA;
600 3405 chunk_size -= 8;
601
602
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 3405 switch (chunk_type) {
603 /* audio data */
604 3 case ISNh_TAG:
605 /* header chunk also contains data; skip over the header portion */
606
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 3 if (chunk_size < 32)
607 ✗ return AVERROR_INVALIDDATA;
608 3 avio_skip(pb, 32);
609 3 chunk_size -= 32;
610 1424 case ISNd_TAG:
611 case SCDl_TAG:
612 case SNDC_TAG:
613 case SDEN_TAG:
614
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 1424 if (!ea->audio_codec) {
615 ✗ avio_skip(pb, chunk_size);
616 ✗ break;
617
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 1424 } else if (ea->audio_codec == AV_CODEC_ID_PCM_S16LE_PLANAR ||
618
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 1282 ea->audio_codec == AV_CODEC_ID_MP3) {
619
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 142 if (chunk_size < 12)
620 ✗ return AVERROR_INVALIDDATA;
621 142 num_samples = avio_rl32(pb);
622 142 avio_skip(pb, 8);
623 142 chunk_size -= 12;
624
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 1282 } else if (ea->audio_codec == AV_CODEC_ID_ADPCM_PSX) {
625 ✗ if (chunk_size < 8)
626 ✗ return AVERROR_INVALIDDATA;
627 ✗ avio_skip(pb, 8);
628 ✗ chunk_size -= 8;
629 }
630
631
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 1424 if (partial_packet) {
632 ✗ avpriv_request_sample(s, "video header followed by audio packet");
633 ✗ av_packet_unref(pkt);
634 ✗ partial_packet = 0;
635 }
636
637
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 1424 if (!chunk_size)
638 1 continue;
639
640 1423 ret = av_get_packet(pb, pkt, chunk_size);
641
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 1423 if (ret < 0)
642 ✗ return ret;
643 1423 pkt->stream_index = ea->audio_stream_index;
644
645
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 1423 switch (ea->audio_codec) {
646 905 case AV_CODEC_ID_ADPCM_EA:
647 case AV_CODEC_ID_ADPCM_EA_R1:
648 case AV_CODEC_ID_ADPCM_EA_R2:
649 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
650 case AV_CODEC_ID_ADPCM_EA_R3:
651
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 905 if (pkt->size < 4) {
652 ✗ av_log(s, AV_LOG_ERROR, "Packet is too short\n");
653 ✗ return AVERROR_INVALIDDATA;
654 }
655
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 905 if (ea->audio_codec == AV_CODEC_ID_ADPCM_EA_R3)
656 125 pkt->duration = AV_RB32(pkt->data);
657 else
658 780 pkt->duration = AV_RL32(pkt->data);
659 905 break;
660 98 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
661 98 pkt->duration = ret * 2 / ea->num_channels;
662 98 break;
663 142 case AV_CODEC_ID_PCM_S16LE_PLANAR:
664 case AV_CODEC_ID_MP3:
665 142 pkt->duration = num_samples;
666 142 break;
667 ✗ case AV_CODEC_ID_ADPCM_PSX:
668 ✗ pkt->duration = chunk_size / (16 * ea->num_channels) * 28;
669 ✗ break;
670 278 default:
671 278 pkt->duration = chunk_size / (ea->bytes * ea->num_channels);
672 }
673
674 1423 packet_read = 1;
675 1423 break;
676
677 /* ending tag */
678 8 case 0:
679 case ISNe_TAG:
680 case SCEl_TAG:
681 case SEND_TAG:
682 case SEEN_TAG:
683
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 3856 while (!avio_feof(pb)) {
684 3848 int tag = avio_rl32(pb);
685
686
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 3848 if (tag == ISNh_TAG ||
687
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 3848 tag == SCHl_TAG ||
688
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 3848 tag == SEAD_TAG ||
689 tag == SHEN_TAG) {
690 ✗ avio_skip(pb, -4);
691 ✗ break;
692 }
693 }
694
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 8 if (avio_feof(pb))
695 8 ret = AVERROR_EOF;
696 8 hit_end = 1;
697 8 break;
698
699 329 case MVIh_TAG:
700 case kVGT_TAG:
701 case pQGT_TAG:
702 case TGQs_TAG:
703 case MADk_TAG:
704 329 key = AV_PKT_FLAG_KEY;
705 983 case MVIf_TAG:
706 case fVGT_TAG:
707 case MADm_TAG:
708 case MADe_TAG:
709
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 983 if (chunk_size > INT_MAX - 8)
710 ✗ return AVERROR_INVALIDDATA;
711 983 avio_seek(pb, -8, SEEK_CUR); // include chunk preamble
712 983 chunk_size += 8;
713 983 goto get_video_packet;
714
715 270 case mTCD_TAG:
716
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 270 if (chunk_size < 8)
717 ✗ return AVERROR_INVALIDDATA;
718
719 270 avio_skip(pb, 8); // skip ea DCT header
720 270 chunk_size -= 8;
721 270 goto get_video_packet;
722
723 220 case MV0K_TAG:
724 case AV0K_TAG:
725 case MPCh_TAG:
726 case pIQT_TAG:
727 220 key = AV_PKT_FLAG_KEY;
728 case MV0F_TAG:
729 case AV0F_TAG:
730 1945 get_video_packet:
731
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 1945 if (!chunk_size)
732 ✗ continue;
733
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 1945 if (chunk_size > INT_MAX - 3)
734 ✗ return AVERROR_INVALIDDATA;
735
736
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 1945 vp6a = (ea->video.codec == AV_CODEC_ID_VP6A && (chunk_type == MV0F_TAG || chunk_type == MV0K_TAG));
737
738
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 1945 if (partial_packet) {
739 2 ret = av_append_packet(pb, pkt, chunk_size);
740 } else {
741
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 1943 if (vp6a)
742 ✗ avio_seek(pb, -3, SEEK_CUR);
743
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 1943 ret = av_get_packet(pb, pkt, chunk_size + (vp6a ? 3 : 0));
744
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 1943 if (ret >= 0 && vp6a)
745 ✗ AV_WB24(pkt->data, chunk_size);
746 }
747 1945 packet_read = 1;
748
749
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 1945 if (ret < 0) {
750 ✗ partial_packet = 0;
751 ✗ break;
752 }
753
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 1945 partial_packet = vp6a || chunk_type == MVIh_TAG;
754
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 1945 if (ea->alpha.codec && (chunk_type == AV0K_TAG || chunk_type == AV0F_TAG))
755 48 pkt->stream_index = ea->alpha.stream_index;
756 else
757 1897 pkt->stream_index = ea->video.stream_index;
758 1945 pkt->flags |= key;
759 1945 break;
760
761 28 default:
762 28 avio_skip(pb, chunk_size);
763 28 break;
764 }
765 }
766
767
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 3374 if (ret >= 0 && hit_end && !packet_read)
768 ✗ return AVERROR(EAGAIN);
769
770 3374 return ret;
771 }
772
773 #define OFFSET(x) offsetof(EaDemuxContext, x)
774 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
775 static const AVOption options[] = {
776 {"merge_alpha", "return VP6 alpha in the main video stream", OFFSET(merge_alpha), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
777 {NULL}
778 };
779
780 static const AVClass ea_class = {
781 .class_name = "ea demuxer",
782 .item_name = av_default_item_name,
783 .option = options,
784 .version = LIBAVUTIL_VERSION_INT,
785 };
786
787 const FFInputFormat ff_ea_demuxer = {
788 .p.name = "ea",
789 .p.long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Multimedia"),
790 .p.priv_class = &ea_class,
791 .priv_data_size = sizeof(EaDemuxContext),
792 .read_probe = ea_probe,
793 .read_header = ea_read_header,
794 .read_packet = ea_read_packet,
795 };
796