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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 "avformat.h"
32#include "internal.h"
33
34#define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
35#define SEAD_TAG MKTAG('S', 'E', 'A', 'D') /* Sxxx header */
36#define SNDC_TAG MKTAG('S', 'N', 'D', 'C') /* Sxxx data */
37#define SEND_TAG MKTAG('S', 'E', 'N', 'D') /* Sxxx end */
38#define SHEN_TAG MKTAG('S', 'H', 'E', 'N') /* SxEN header */
39#define SDEN_TAG MKTAG('S', 'D', 'E', 'N') /* SxEN data */
40#define SEEN_TAG MKTAG('S', 'E', 'E', 'N') /* SxEN end */
41#define ISNh_TAG MKTAG('1', 'S', 'N', 'h') /* 1SNx header */
42#define EACS_TAG MKTAG('E', 'A', 'C', 'S')
43#define ISNd_TAG MKTAG('1', 'S', 'N', 'd') /* 1SNx data */
44#define ISNe_TAG MKTAG('1', 'S', 'N', 'e') /* 1SNx end */
45#define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
46#define GSTR_TAG MKTAG('G', 'S', 'T', 'R')
47#define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
48#define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
49#define kVGT_TAG MKTAG('k', 'V', 'G', 'T') /* TGV I-frame */
50#define fVGT_TAG MKTAG('f', 'V', 'G', 'T') /* TGV P-frame */
51#define mTCD_TAG MKTAG('m', 'T', 'C', 'D') /* MDEC */
52#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD I-frame */
53#define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD P-frame */
54#define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
55#define MPCh_TAG MKTAG('M', 'P', 'C', 'h') /* MPEG-2 */
56#define TGQs_TAG MKTAG('T', 'G', 'Q', 's') /* TGQ I-frame (appears in .TGQ files) */
57#define pQGT_TAG MKTAG('p', 'Q', 'G', 'T') /* TGQ I-frame (appears in .UV files) */
58#define pIQT_TAG MKTAG('p', 'I', 'Q', 'T') /* TQI/UV2 I-frame (.UV2/.WVE) */
59#define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
60#define MV0K_TAG MKTAG('M', 'V', '0', 'K')
61#define MV0F_TAG MKTAG('M', 'V', '0', 'F')
62#define AVhd_TAG MKTAG('A', 'V', 'h', 'd')
63#define AV0K_TAG MKTAG('A', 'V', '0', 'K')
64#define AV0F_TAG MKTAG('A', 'V', '0', 'F')
65#define MVIh_TAG MKTAG('M', 'V', 'I', 'h') /* CMV header */
66#define MVIf_TAG MKTAG('M', 'V', 'I', 'f') /* CMV I-frame */
67#define AVP6_TAG MKTAG('A', 'V', 'P', '6')
68
69typedef struct VideoProperties {
70 enum AVCodecID codec;
71 AVRational time_base;
72 int width, height;
73 int nb_frames;
74 int stream_index;
75} VideoProperties;
76
77typedef struct EaDemuxContext {
78 int big_endian;
79
80 VideoProperties video, alpha;
81
82 enum AVCodecID audio_codec;
83 int audio_stream_index;
84
85 int bytes;
86 int sample_rate;
87 int num_channels;
88 int num_samples;
89
90 int platform;
91} EaDemuxContext;
92
93static uint32_t read_arbitrary(AVIOContext *pb)
94{
95 uint8_t size, byte;
96 int i;
97 uint32_t word;
98
99 size = avio_r8(pb);
100
101 word = 0;
102 for (i = 0; i < size; i++) {
103 byte = avio_r8(pb);
104 word <<= 8;
105 word |= byte;
106 }
107
108 return word;
109}
110
111static int process_audio_header_elements(AVFormatContext *s)
112{
113 EaDemuxContext *ea = s->priv_data;
114 AVIOContext *pb = s->pb;
115 int in_header = 1;
116 int compression_type = -1, revision = -1, revision2 = -1;
117
118 ea->bytes = 2;
119 ea->sample_rate = -1;
120 ea->num_channels = 1;
121
122 while (!avio_feof(pb) && in_header) {
123 int in_subheader;
124 uint8_t byte;
125 byte = avio_r8(pb);
126
127 switch (byte) {
128 case 0xFD:
129 av_log(s, AV_LOG_DEBUG, "entered audio subheader\n");
130 in_subheader = 1;
131 while (!avio_feof(pb) && in_subheader) {
132 uint8_t subbyte;
133 subbyte = avio_r8(pb);
134
135 switch (subbyte) {
136 case 0x80:
137 revision = read_arbitrary(pb);
138 av_log(s, AV_LOG_DEBUG,
139 "revision (element 0x80) set to 0x%08x\n", revision);
140 break;
141 case 0x82:
142 ea->num_channels = read_arbitrary(pb);
143 av_log(s, AV_LOG_DEBUG,
144 "num_channels (element 0x82) set to 0x%08x\n",
145 ea->num_channels);
146 break;
147 case 0x83:
148 compression_type = read_arbitrary(pb);
149 av_log(s, AV_LOG_DEBUG,
150 "compression_type (element 0x83) set to 0x%08x\n",
151 compression_type);
152 break;
153 case 0x84:
154 ea->sample_rate = read_arbitrary(pb);
155 av_log(s, AV_LOG_DEBUG,
156 "sample_rate (element 0x84) set to %i\n",
157 ea->sample_rate);
158 break;
159 case 0x85:
160 ea->num_samples = read_arbitrary(pb);
161 av_log(s, AV_LOG_DEBUG,
162 "num_samples (element 0x85) set to 0x%08x\n",
163 ea->num_samples);
164 break;
165 case 0x8A:
166 av_log(s, AV_LOG_DEBUG,
167 "element 0x%02x set to 0x%08"PRIx32"\n",
168 subbyte, read_arbitrary(pb));
169 av_log(s, AV_LOG_DEBUG, "exited audio subheader\n");
170 in_subheader = 0;
171 break;
172 case 0xA0:
173 revision2 = read_arbitrary(pb);
174 av_log(s, AV_LOG_DEBUG,
175 "revision2 (element 0xA0) set to 0x%08x\n",
176 revision2);
177 break;
178 case 0xFF:
179 av_log(s, AV_LOG_DEBUG,
180 "end of header block reached (within audio subheader)\n");
181 in_subheader = 0;
182 in_header = 0;
183 break;
184 default:
185 av_log(s, AV_LOG_DEBUG,
186 "element 0x%02x set to 0x%08"PRIx32"\n",
187 subbyte, read_arbitrary(pb));
188 break;
189 }
190 }
191 break;
192 case 0xFF:
193 av_log(s, AV_LOG_DEBUG, "end of header block reached\n");
194 in_header = 0;
195 break;
196 default:
197 av_log(s, AV_LOG_DEBUG,
198 "header element 0x%02x set to 0x%08"PRIx32"\n",
199 byte, read_arbitrary(pb));
200 break;
201 }
202 }
203
204 switch (compression_type) {
205 case 0:
206 ea->audio_codec = AV_CODEC_ID_PCM_S16LE;
207 break;
208 case 7:
209 ea->audio_codec = AV_CODEC_ID_ADPCM_EA;
210 break;
211 case -1:
212 switch (revision) {
213 case 1:
214 ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R1;
215 break;
216 case 2:
217 ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R2;
218 break;
219 case 3:
220 ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R3;
221 break;
222 case -1:
223 break;
224 default:
225 avpriv_request_sample(s, "stream type; revision=%i", revision);
226 return 0;
227 }
228 switch (revision2) {
229 case 8:
230 ea->audio_codec = AV_CODEC_ID_PCM_S16LE_PLANAR;
231 break;
232 case 10:
233 switch (revision) {
234 case -1:
235 case 2: ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R1; break;
236 case 3: ea->audio_codec = AV_CODEC_ID_ADPCM_EA_R2; break;
237 default:
238 avpriv_request_sample(s, "stream type; revision=%i, revision2=%i", revision, revision2);
239 return 0;
240 }
241 break;
242 case 15:
243 case 16:
244 ea->audio_codec = AV_CODEC_ID_MP3;
245 break;
246 case -1:
247 break;
248 default:
249 ea->audio_codec = AV_CODEC_ID_NONE;
250 avpriv_request_sample(s, "stream type; revision2=%i", revision2);
251 return 0;
252 }
253 break;
254 default:
255 avpriv_request_sample(s,
256 "stream type; compression_type=%i",
257 compression_type);
258 return 0;
259 }
260
261 if (ea->audio_codec == AV_CODEC_ID_NONE && ea->platform == 0x01)
262 ea->audio_codec = AV_CODEC_ID_ADPCM_PSX;
263 if (ea->sample_rate == -1)
264 ea->sample_rate = revision == 3 ? 48000 : 22050;
265
266 return 1;
267}
268
269static void process_audio_header_eacs(AVFormatContext *s)
270{
271 EaDemuxContext *ea = s->priv_data;
272 AVIOContext *pb = s->pb;
273 int compression_type;
274
275 ea->sample_rate = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb);
276 ea->bytes = avio_r8(pb); /* 1=8-bit, 2=16-bit */
277 ea->num_channels = avio_r8(pb);
278 compression_type = avio_r8(pb);
279 avio_skip(pb, 13);
280
281 switch (compression_type) {
282 case 0:
283 switch (ea->bytes) {
284 case 1:
285 ea->audio_codec = AV_CODEC_ID_PCM_S8;
286 break;
287 case 2:
288 ea->audio_codec = AV_CODEC_ID_PCM_S16LE;
289 break;
290 }
291 break;
292 case 1:
293 ea->audio_codec = AV_CODEC_ID_PCM_MULAW;
294 ea->bytes = 1;
295 break;
296 case 2:
297 ea->audio_codec = AV_CODEC_ID_ADPCM_IMA_EA_EACS;
298 break;
299 default:
300 avpriv_request_sample(s,
301 "stream type; audio compression_type=%i",
302 compression_type);
303 }
304}
305
306static void process_audio_header_sead(AVFormatContext *s)
307{
308 EaDemuxContext *ea = s->priv_data;
309 AVIOContext *pb = s->pb;
310
311 ea->sample_rate = avio_rl32(pb);
312 ea->bytes = avio_rl32(pb); /* 1=8-bit, 2=16-bit */
313 ea->num_channels = avio_rl32(pb);
314 ea->audio_codec = AV_CODEC_ID_ADPCM_IMA_EA_SEAD;
315}
316
317static void process_video_header_mdec(AVFormatContext *s, VideoProperties *video)
318{
319 AVIOContext *pb = s->pb;
320 avio_skip(pb, 4);
321 video->width = avio_rl16(pb);
322 video->height = avio_rl16(pb);
323 video->time_base = (AVRational) { 1, 15 };
324 video->codec = AV_CODEC_ID_MDEC;
325}
326
327static int process_video_header_vp6(AVFormatContext *s, VideoProperties *video)
328{
329 AVIOContext *pb = s->pb;
330
331 avio_skip(pb, 8);
332 video->nb_frames = avio_rl32(pb);
333 avio_skip(pb, 4);
334 video->time_base.den = avio_rl32(pb);
335 video->time_base.num = avio_rl32(pb);
336 if (video->time_base.den <= 0 || video->time_base.num <= 0) {
337 av_log(s, AV_LOG_ERROR, "Timebase is invalid\n");
338 return AVERROR_INVALIDDATA;
339 }
340 video->codec = AV_CODEC_ID_VP6;
341
342 return 1;
343}
344
345static void process_video_header_cmv(AVFormatContext *s, VideoProperties *video)
346{
347 int fps;
348
349 avio_skip(s->pb, 10);
350 fps = avio_rl16(s->pb);
351 if (fps)
352 video->time_base = (AVRational) { 1, fps };
353 video->codec = AV_CODEC_ID_CMV;
354}
355
356/* Process EA file header.
357 * Return 1 if the EA file is valid and successfully opened, 0 otherwise. */
358static int process_ea_header(AVFormatContext *s)
359{
360 uint32_t blockid, size = 0;
361 EaDemuxContext *ea = s->priv_data;
362 AVIOContext *pb = s->pb;
363 int i;
364
365 for (i = 0; i < 5 && (!ea->audio_codec || !ea->video.codec); i++) {
366 uint64_t startpos = avio_tell(pb);
367 int err = 0;
368
369 blockid = avio_rl32(pb);
370 size = avio_rl32(pb);
371 if (i == 0)
372 ea->big_endian = size > av_bswap32(size);
373 if (ea->big_endian)
374 size = av_bswap32(size);
375
376 if (size < 8) {
377 av_log(s, AV_LOG_ERROR, "chunk size too small\n");
378 return AVERROR_INVALIDDATA;
379 }
380
381 switch (blockid) {
382 case ISNh_TAG:
383 if (avio_rl32(pb) != EACS_TAG) {
384 avpriv_request_sample(s, "unknown 1SNh headerid");
385 return 0;
386 }
387 process_audio_header_eacs(s);
388 break;
389
390 case SCHl_TAG:
391 case SHEN_TAG:
392 blockid = avio_rl32(pb);
393 if (blockid == GSTR_TAG) {
394 avio_skip(pb, 4);
395 } else if ((blockid & 0xFF) != (PT00_TAG & 0xFF)) {
396 blockid = avio_rl32(pb);
397 }
398 ea->platform = (blockid >> 16) & 0xFF;
399 err = process_audio_header_elements(s);
400 break;
401
402 case SEAD_TAG:
403 process_audio_header_sead(s);
404 break;
405
406 case MVIh_TAG:
407 process_video_header_cmv(s, &ea->video);
408 break;
409
410 case kVGT_TAG:
411 ea->video.codec = AV_CODEC_ID_TGV;
412 break;
413
414 case mTCD_TAG:
415 process_video_header_mdec(s, &ea->video);
416 break;
417
418 case MPCh_TAG:
419 ea->video.codec = AV_CODEC_ID_MPEG2VIDEO;
420 break;
421
422 case pQGT_TAG:
423 case TGQs_TAG:
424 ea->video.codec = AV_CODEC_ID_TGQ;
425 ea->video.time_base = (AVRational) { 1, 15 };
426 break;
427
428 case pIQT_TAG:
429 ea->video.codec = AV_CODEC_ID_TQI;
430 ea->video.time_base = (AVRational) { 1, 15 };
431 break;
432
433 case MADk_TAG:
434 ea->video.codec = AV_CODEC_ID_MAD;
435 avio_skip(pb, 6);
436 ea->video.time_base = (AVRational) { avio_rl16(pb), 1000 };
437 break;
438
439 case MVhd_TAG:
440 err = process_video_header_vp6(s, &ea->video);
441 break;
442
443 case AVhd_TAG:
444 err = process_video_header_vp6(s, &ea->alpha);
445 break;
446 }
447
448 if (err < 0) {
449 av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
450 return err;
451 }
452
453 avio_seek(pb, startpos + size, SEEK_SET);
454 }
455
456 avio_seek(pb, 0, SEEK_SET);
457
458 return 1;
459}
460
461static int ea_probe(AVProbeData *p)
462{
463 unsigned big_endian, size;
464
465 switch (AV_RL32(&p->buf[0])) {
466 case ISNh_TAG:
467 case SCHl_TAG:
468 case SEAD_TAG:
469 case SHEN_TAG:
470 case kVGT_TAG:
471 case MADk_TAG:
472 case MPCh_TAG:
473 case MVhd_TAG:
474 case MVIh_TAG:
475 case AVP6_TAG:
476 break;
477 default:
478 return 0;
479 }
480 size = AV_RL32(&p->buf[4]);
481 big_endian = size > 0x000FFFFF;
482 if (big_endian)
483 size = av_bswap32(size);
484 if (size > 0xfffff || size < 8)
485 return 0;
486
487 return AVPROBE_SCORE_MAX;
488}
489
490static int init_video_stream(AVFormatContext *s, VideoProperties *video)
491{
492 AVStream *st;
493
494 if (!video->codec)
495 return 0;
496
497 /* initialize the video decoder stream */
498 st = avformat_new_stream(s, NULL);
499 if (!st)
500 return AVERROR(ENOMEM);
501 video->stream_index = st->index;
502 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
503 st->codecpar->codec_id = video->codec;
504 // parsing is necessary to make FFmpeg generate correct timestamps
505 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO)
506 st->need_parsing = AVSTREAM_PARSE_HEADERS;
507 st->codecpar->codec_tag = 0; /* no fourcc */
508 st->codecpar->width = video->width;
509 st->codecpar->height = video->height;
510 st->duration = st->nb_frames = video->nb_frames;
511 if (video->time_base.num)
512 avpriv_set_pts_info(st, 64, video->time_base.num, video->time_base.den);
513 st->r_frame_rate =
514 st->avg_frame_rate = av_inv_q(video->time_base);
515 return 0;
516}
517
518static int ea_read_header(AVFormatContext *s)
519{
520 EaDemuxContext *ea = s->priv_data;
521 AVStream *st;
522
523 if (process_ea_header(s)<=0)
524 return AVERROR(EIO);
525
526 if (init_video_stream(s, &ea->video) || init_video_stream(s, &ea->alpha))
527 return AVERROR(ENOMEM);
528
529 if (ea->audio_codec) {
530 if (ea->num_channels <= 0 || ea->num_channels > 2) {
531 av_log(s, AV_LOG_WARNING,
532 "Unsupported number of channels: %d\n", ea->num_channels);
533 ea->audio_codec = 0;
534 return 1;
535 }
536 if (ea->sample_rate <= 0) {
537 av_log(s, AV_LOG_ERROR,
538 "Unsupported sample rate: %d\n", ea->sample_rate);
539 ea->audio_codec = 0;
540 return 1;
541 }
542 if (ea->bytes <= 0 || ea->bytes > 2) {
543 av_log(s, AV_LOG_ERROR,
544 "Invalid number of bytes per sample: %d\n", ea->bytes);
545 ea->audio_codec = AV_CODEC_ID_NONE;
546 return 1;
547 }
548
549 /* initialize the audio decoder stream */
550 st = avformat_new_stream(s, NULL);
551 if (!st)
552 return AVERROR(ENOMEM);
553 avpriv_set_pts_info(st, 33, 1, ea->sample_rate);
554 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
555 st->codecpar->codec_id = ea->audio_codec;
556 st->codecpar->codec_tag = 0; /* no tag */
557 st->codecpar->channels = ea->num_channels;
558 st->codecpar->sample_rate = ea->sample_rate;
559 st->codecpar->bits_per_coded_sample = ea->bytes * 8;
560 st->codecpar->bit_rate = (int64_t)st->codecpar->channels *
561 st->codecpar->sample_rate *
562 st->codecpar->bits_per_coded_sample / 4;
563 st->codecpar->block_align = st->codecpar->channels *
564 st->codecpar->bits_per_coded_sample;
565 ea->audio_stream_index = st->index;
566 st->start_time = 0;
567 }
568
569 return 1;
570}
571
572static int ea_read_packet(AVFormatContext *s, AVPacket *pkt)
573{
574 EaDemuxContext *ea = s->priv_data;
575 AVIOContext *pb = s->pb;
576 int partial_packet = 0;
577 unsigned int chunk_type, chunk_size;
578 int ret = 0, packet_read = 0, key = 0;
579 int av_uninit(num_samples);
580
581 while (!packet_read || partial_packet) {
582 chunk_type = avio_rl32(pb);
583 chunk_size = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb);
584 if (chunk_size < 8)
585 return AVERROR_INVALIDDATA;
586 chunk_size -= 8;
587
588 switch (chunk_type) {
589 /* audio data */
590 case ISNh_TAG:
591 /* header chunk also contains data; skip over the header portion */
592 if (chunk_size < 32)
593 return AVERROR_INVALIDDATA;
594 avio_skip(pb, 32);
595 chunk_size -= 32;
596 case ISNd_TAG:
597 case SCDl_TAG:
598 case SNDC_TAG:
599 case SDEN_TAG:
600 if (!ea->audio_codec) {
601 avio_skip(pb, chunk_size);
602 break;
603 } else if (ea->audio_codec == AV_CODEC_ID_PCM_S16LE_PLANAR ||
604 ea->audio_codec == AV_CODEC_ID_MP3) {
605 num_samples = avio_rl32(pb);
606 avio_skip(pb, 8);
607 chunk_size -= 12;
608 } else if (ea->audio_codec == AV_CODEC_ID_ADPCM_PSX) {
609 avio_skip(pb, 8);
610 chunk_size -= 8;
611 }
612
613 if (partial_packet) {
614 avpriv_request_sample(s, "video header followed by audio packet");
615 av_packet_unref(pkt);
616 partial_packet = 0;
617 }
618
619 if (!chunk_size)
620 continue;
621
622 ret = av_get_packet(pb, pkt, chunk_size);
623 if (ret < 0)
624 return ret;
625 pkt->stream_index = ea->audio_stream_index;
626
627 switch (ea->audio_codec) {
628 case AV_CODEC_ID_ADPCM_EA:
629 case AV_CODEC_ID_ADPCM_EA_R1:
630 case AV_CODEC_ID_ADPCM_EA_R2:
631 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
632 case AV_CODEC_ID_ADPCM_EA_R3:
633 if (pkt->size < 4) {
634 av_log(s, AV_LOG_ERROR, "Packet is too short\n");
635 av_packet_unref(pkt);
636 return AVERROR_INVALIDDATA;
637 }
638 if (ea->audio_codec == AV_CODEC_ID_ADPCM_EA_R3)
639 pkt->duration = AV_RB32(pkt->data);
640 else
641 pkt->duration = AV_RL32(pkt->data);
642 break;
643 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
644 pkt->duration = ret * 2 / ea->num_channels;
645 break;
646 case AV_CODEC_ID_PCM_S16LE_PLANAR:
647 case AV_CODEC_ID_MP3:
648 pkt->duration = num_samples;
649 break;
650 case AV_CODEC_ID_ADPCM_PSX:
651 pkt->duration = chunk_size / (16 * ea->num_channels) * 28;
652 break;
653 default:
654 pkt->duration = chunk_size / (ea->bytes * ea->num_channels);
655 }
656
657 packet_read = 1;
658 break;
659
660 /* ending tag */
661 case 0:
662 case ISNe_TAG:
663 case SCEl_TAG:
664 case SEND_TAG:
665 case SEEN_TAG:
666 while (!avio_feof(pb)) {
667 int tag = avio_rl32(pb);
668
669 if (tag == ISNh_TAG ||
670 tag == SCHl_TAG ||
671 tag == SEAD_TAG ||
672 tag == SHEN_TAG) {
673 avio_skip(pb, -4);
674 break;
675 }
676 }
677 if (avio_feof(pb))
678 ret = AVERROR_EOF;
679 packet_read = 1;
680 break;
681
682 case MVIh_TAG:
683 case kVGT_TAG:
684 case pQGT_TAG:
685 case TGQs_TAG:
686 case MADk_TAG:
687 key = AV_PKT_FLAG_KEY;
688 case MVIf_TAG:
689 case fVGT_TAG:
690 case MADm_TAG:
691 case MADe_TAG:
692 avio_seek(pb, -8, SEEK_CUR); // include chunk preamble
693 chunk_size += 8;
694 goto get_video_packet;
695
696 case mTCD_TAG:
697 if (chunk_size < 8)
698 return AVERROR_INVALIDDATA;
699
700 avio_skip(pb, 8); // skip ea DCT header
701 chunk_size -= 8;
702 goto get_video_packet;
703
704 case MV0K_TAG:
705 case AV0K_TAG:
706 case MPCh_TAG:
707 case pIQT_TAG:
708 key = AV_PKT_FLAG_KEY;
709 case MV0F_TAG:
710 case AV0F_TAG:
711get_video_packet:
712 if (!chunk_size)
713 continue;
714
715 if (partial_packet) {
716 ret = av_append_packet(pb, pkt, chunk_size);
717 } else
718 ret = av_get_packet(pb, pkt, chunk_size);
719 if (ret < 0) {
720 packet_read = 1;
721 break;
722 }
723 partial_packet = chunk_type == MVIh_TAG;
724 if (chunk_type == AV0K_TAG || chunk_type == AV0F_TAG)
725 pkt->stream_index = ea->alpha.stream_index;
726 else
727 pkt->stream_index = ea->video.stream_index;
728 pkt->flags |= key;
729 packet_read = 1;
730 break;
731
732 default:
733 avio_skip(pb, chunk_size);
734 break;
735 }
736 }
737
738 if (ret < 0 && partial_packet)
739 av_packet_unref(pkt);
740 return ret;
741}
742
743AVInputFormat ff_ea_demuxer = {
744 .name = "ea",
745 .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Multimedia"),
746 .priv_data_size = sizeof(EaDemuxContext),
747 .read_probe = ea_probe,
748 .read_header = ea_read_header,
749 .read_packet = ea_read_packet,
750};
751
generated by cgit at 2024-05-17 02:02:35 (GMT)