849ade0b2dae99f9820156b48abb60930933a017
[libav.git] / libavformat / mov.c
1 /*
2 * MOV demuxer
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5 *
6 * first version by Francois Revol <revol@free.fr>
7 * seek function by Gael Chardon <gael.dev@4now.net>
8 *
9 * This file is part of Libav.
10 *
11 * Libav is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
15 *
16 * Libav is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with Libav; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 */
25
26 #include <limits.h>
27
28 //#define DEBUG
29 //#define MOV_EXPORT_ALL_METADATA
30
31 #include "libavutil/attributes.h"
32 #include "libavutil/channel_layout.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/intfloat.h"
35 #include "libavutil/mathematics.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/dict.h"
38 #include "libavcodec/ac3tab.h"
39 #include "avformat.h"
40 #include "internal.h"
41 #include "avio_internal.h"
42 #include "riff.h"
43 #include "isom.h"
44 #include "libavcodec/get_bits.h"
45 #include "id3v1.h"
46 #include "mov_chan.h"
47
48 #if CONFIG_ZLIB
49 #include <zlib.h>
50 #endif
51
52 #include "qtpalette.h"
53
54
55 #undef NDEBUG
56 #include <assert.h>
57
58 /* those functions parse an atom */
59 /* links atom IDs to parse functions */
60 typedef struct MOVParseTableEntry {
61 uint32_t type;
62 int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
63 } MOVParseTableEntry;
64
65 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
66
67 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
68 unsigned len, const char *key)
69 {
70 char buf[16];
71
72 short current, total = 0;
73 avio_rb16(pb); // unknown
74 current = avio_rb16(pb);
75 if (len >= 6)
76 total = avio_rb16(pb);
77 if (!total)
78 snprintf(buf, sizeof(buf), "%d", current);
79 else
80 snprintf(buf, sizeof(buf), "%d/%d", current, total);
81 av_dict_set(&c->fc->metadata, key, buf, 0);
82
83 return 0;
84 }
85
86 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
87 unsigned len, const char *key)
88 {
89 char buf[16];
90
91 /* bypass padding bytes */
92 avio_r8(pb);
93 avio_r8(pb);
94 avio_r8(pb);
95
96 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
97 av_dict_set(&c->fc->metadata, key, buf, 0);
98
99 return 0;
100 }
101
102 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
103 unsigned len, const char *key)
104 {
105 char buf[16];
106
107 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
108 av_dict_set(&c->fc->metadata, key, buf, 0);
109
110 return 0;
111 }
112
113 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
114 unsigned len, const char *key)
115 {
116 short genre;
117 char buf[20];
118
119 avio_r8(pb); // unknown
120
121 genre = avio_r8(pb);
122 if (genre < 1 || genre > ID3v1_GENRE_MAX)
123 return 0;
124 snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
125 av_dict_set(&c->fc->metadata, key, buf, 0);
126
127 return 0;
128 }
129
130 static const uint32_t mac_to_unicode[128] = {
131 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
132 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
133 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
134 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
135 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
136 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
137 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
138 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
139 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
140 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
141 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
142 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
143 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
144 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
145 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
146 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
147 };
148
149 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
150 char *dst, int dstlen)
151 {
152 char *p = dst;
153 char *end = dst+dstlen-1;
154 int i;
155
156 for (i = 0; i < len; i++) {
157 uint8_t t, c = avio_r8(pb);
158 if (c < 0x80 && p < end)
159 *p++ = c;
160 else
161 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
162 }
163 *p = 0;
164 return p - dst;
165 }
166
167 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
168 {
169 AVPacket pkt;
170 AVStream *st;
171 MOVStreamContext *sc;
172 enum AVCodecID id;
173 int ret;
174
175 switch (type) {
176 case 0xd: id = AV_CODEC_ID_MJPEG; break;
177 case 0xe: id = AV_CODEC_ID_PNG; break;
178 case 0x1b: id = AV_CODEC_ID_BMP; break;
179 default:
180 av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
181 avio_skip(pb, len);
182 return 0;
183 }
184
185 st = avformat_new_stream(c->fc, NULL);
186 if (!st)
187 return AVERROR(ENOMEM);
188 sc = av_mallocz(sizeof(*sc));
189 if (!sc)
190 return AVERROR(ENOMEM);
191 st->priv_data = sc;
192
193 ret = av_get_packet(pb, &pkt, len);
194 if (ret < 0)
195 return ret;
196
197 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
198
199 st->attached_pic = pkt;
200 st->attached_pic.stream_index = st->index;
201 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
202
203 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
204 st->codec->codec_id = id;
205
206 return 0;
207 }
208
209 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
210 {
211 #ifdef MOV_EXPORT_ALL_METADATA
212 char tmp_key[5];
213 #endif
214 char str[1024], key2[16], language[4] = {0};
215 const char *key = NULL;
216 uint16_t langcode = 0;
217 uint32_t data_type = 0, str_size;
218 int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
219
220 switch (atom.type) {
221 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
222 case MKTAG(0xa9,'a','u','t'):
223 case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
224 case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
225 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
226 case MKTAG( 'c','p','r','t'):
227 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
228 case MKTAG(0xa9,'c','m','t'):
229 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
230 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
231 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
232 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
233 case MKTAG( 'g','n','r','e'): key = "genre";
234 parse = mov_metadata_gnre; break;
235 case MKTAG(0xa9,'t','o','o'):
236 case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
237 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
238 case MKTAG( 'd','e','s','c'): key = "description";break;
239 case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
240 case MKTAG( 't','v','s','h'): key = "show"; break;
241 case MKTAG( 't','v','e','n'): key = "episode_id";break;
242 case MKTAG( 't','v','n','n'): key = "network"; break;
243 case MKTAG( 't','r','k','n'): key = "track";
244 parse = mov_metadata_track_or_disc_number; break;
245 case MKTAG( 'd','i','s','k'): key = "disc";
246 parse = mov_metadata_track_or_disc_number; break;
247 case MKTAG( 't','v','e','s'): key = "episode_sort";
248 parse = mov_metadata_int8_bypass_padding; break;
249 case MKTAG( 't','v','s','n'): key = "season_number";
250 parse = mov_metadata_int8_bypass_padding; break;
251 case MKTAG( 's','t','i','k'): key = "media_type";
252 parse = mov_metadata_int8_no_padding; break;
253 case MKTAG( 'h','d','v','d'): key = "hd_video";
254 parse = mov_metadata_int8_no_padding; break;
255 case MKTAG( 'p','g','a','p'): key = "gapless_playback";
256 parse = mov_metadata_int8_no_padding; break;
257 }
258
259 if (c->itunes_metadata && atom.size > 8) {
260 int data_size = avio_rb32(pb);
261 int tag = avio_rl32(pb);
262 if (tag == MKTAG('d','a','t','a')) {
263 data_type = avio_rb32(pb); // type
264 avio_rb32(pb); // unknown
265 str_size = data_size - 16;
266 atom.size -= 16;
267
268 if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
269 int ret = mov_read_covr(c, pb, data_type, str_size);
270 if (ret < 0) {
271 av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
272 return ret;
273 }
274 }
275 } else return 0;
276 } else if (atom.size > 4 && key && !c->itunes_metadata) {
277 str_size = avio_rb16(pb); // string length
278 langcode = avio_rb16(pb);
279 ff_mov_lang_to_iso639(langcode, language);
280 atom.size -= 4;
281 } else
282 str_size = atom.size;
283
284 #ifdef MOV_EXPORT_ALL_METADATA
285 if (!key) {
286 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
287 key = tmp_key;
288 }
289 #endif
290
291 if (!key)
292 return 0;
293 if (atom.size < 0)
294 return AVERROR_INVALIDDATA;
295
296 str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
297
298 if (parse)
299 parse(c, pb, str_size, key);
300 else {
301 if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded
302 mov_read_mac_string(c, pb, str_size, str, sizeof(str));
303 } else {
304 avio_read(pb, str, str_size);
305 str[str_size] = 0;
306 }
307 av_dict_set(&c->fc->metadata, key, str, 0);
308 if (*language && strcmp(language, "und")) {
309 snprintf(key2, sizeof(key2), "%s-%s", key, language);
310 av_dict_set(&c->fc->metadata, key2, str, 0);
311 }
312 }
313 av_dlog(c->fc, "lang \"%3s\" ", language);
314 av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
315 key, str, (char*)&atom.type, str_size, atom.size);
316
317 return 0;
318 }
319
320 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
321 {
322 int64_t start;
323 int i, nb_chapters, str_len, version;
324 char str[256+1];
325
326 if ((atom.size -= 5) < 0)
327 return 0;
328
329 version = avio_r8(pb);
330 avio_rb24(pb);
331 if (version)
332 avio_rb32(pb); // ???
333 nb_chapters = avio_r8(pb);
334
335 for (i = 0; i < nb_chapters; i++) {
336 if (atom.size < 9)
337 return 0;
338
339 start = avio_rb64(pb);
340 str_len = avio_r8(pb);
341
342 if ((atom.size -= 9+str_len) < 0)
343 return 0;
344
345 avio_read(pb, str, str_len);
346 str[str_len] = 0;
347 avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
348 }
349 return 0;
350 }
351
352 #define MIN_DATA_ENTRY_BOX_SIZE 12
353 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
354 {
355 AVStream *st;
356 MOVStreamContext *sc;
357 int entries, i, j;
358
359 if (c->fc->nb_streams < 1)
360 return 0;
361 st = c->fc->streams[c->fc->nb_streams-1];
362 sc = st->priv_data;
363
364 avio_rb32(pb); // version + flags
365 entries = avio_rb32(pb);
366 if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
367 entries >= UINT_MAX / sizeof(*sc->drefs))
368 return AVERROR_INVALIDDATA;
369 av_free(sc->drefs);
370 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
371 if (!sc->drefs)
372 return AVERROR(ENOMEM);
373 sc->drefs_count = entries;
374
375 for (i = 0; i < sc->drefs_count; i++) {
376 MOVDref *dref = &sc->drefs[i];
377 uint32_t size = avio_rb32(pb);
378 int64_t next = avio_tell(pb) + size - 4;
379
380 if (size < 12)
381 return AVERROR_INVALIDDATA;
382
383 dref->type = avio_rl32(pb);
384 avio_rb32(pb); // version + flags
385 av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
386
387 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
388 /* macintosh alias record */
389 uint16_t volume_len, len;
390 int16_t type;
391
392 avio_skip(pb, 10);
393
394 volume_len = avio_r8(pb);
395 volume_len = FFMIN(volume_len, 27);
396 avio_read(pb, dref->volume, 27);
397 dref->volume[volume_len] = 0;
398 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
399
400 avio_skip(pb, 12);
401
402 len = avio_r8(pb);
403 len = FFMIN(len, 63);
404 avio_read(pb, dref->filename, 63);
405 dref->filename[len] = 0;
406 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
407
408 avio_skip(pb, 16);
409
410 /* read next level up_from_alias/down_to_target */
411 dref->nlvl_from = avio_rb16(pb);
412 dref->nlvl_to = avio_rb16(pb);
413 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
414 dref->nlvl_from, dref->nlvl_to);
415
416 avio_skip(pb, 16);
417
418 for (type = 0; type != -1 && avio_tell(pb) < next; ) {
419 if (pb->eof_reached)
420 return AVERROR_EOF;
421 type = avio_rb16(pb);
422 len = avio_rb16(pb);
423 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
424 if (len&1)
425 len += 1;
426 if (type == 2) { // absolute path
427 av_free(dref->path);
428 dref->path = av_mallocz(len+1);
429 if (!dref->path)
430 return AVERROR(ENOMEM);
431 avio_read(pb, dref->path, len);
432 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
433 len -= volume_len;
434 memmove(dref->path, dref->path+volume_len, len);
435 dref->path[len] = 0;
436 }
437 for (j = 0; j < len; j++)
438 if (dref->path[j] == ':')
439 dref->path[j] = '/';
440 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
441 } else if (type == 0) { // directory name
442 av_free(dref->dir);
443 dref->dir = av_malloc(len+1);
444 if (!dref->dir)
445 return AVERROR(ENOMEM);
446 avio_read(pb, dref->dir, len);
447 dref->dir[len] = 0;
448 for (j = 0; j < len; j++)
449 if (dref->dir[j] == ':')
450 dref->dir[j] = '/';
451 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
452 } else
453 avio_skip(pb, len);
454 }
455 }
456 avio_seek(pb, next, SEEK_SET);
457 }
458 return 0;
459 }
460
461 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
462 {
463 AVStream *st;
464 uint32_t type;
465 uint32_t av_unused ctype;
466
467 if (c->fc->nb_streams < 1) // meta before first trak
468 return 0;
469
470 st = c->fc->streams[c->fc->nb_streams-1];
471
472 avio_r8(pb); /* version */
473 avio_rb24(pb); /* flags */
474
475 /* component type */
476 ctype = avio_rl32(pb);
477 type = avio_rl32(pb); /* component subtype */
478
479 av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
480 av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
481
482 if (type == MKTAG('v','i','d','e'))
483 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
484 else if (type == MKTAG('s','o','u','n'))
485 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
486 else if (type == MKTAG('m','1','a',' '))
487 st->codec->codec_id = AV_CODEC_ID_MP2;
488 else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
489 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
490
491 avio_rb32(pb); /* component manufacture */
492 avio_rb32(pb); /* component flags */
493 avio_rb32(pb); /* component flags mask */
494
495 return 0;
496 }
497
498 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
499 {
500 AVStream *st;
501 int tag;
502
503 if (fc->nb_streams < 1)
504 return 0;
505 st = fc->streams[fc->nb_streams-1];
506
507 avio_rb32(pb); /* version + flags */
508 ff_mp4_read_descr(fc, pb, &tag);
509 if (tag == MP4ESDescrTag) {
510 ff_mp4_parse_es_descr(pb, NULL);
511 } else
512 avio_rb16(pb); /* ID */
513
514 ff_mp4_read_descr(fc, pb, &tag);
515 if (tag == MP4DecConfigDescrTag)
516 ff_mp4_read_dec_config_descr(fc, st, pb);
517 return 0;
518 }
519
520 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
521 {
522 return ff_mov_read_esds(c->fc, pb, atom);
523 }
524
525 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
526 {
527 AVStream *st;
528 int ac3info, acmod, lfeon, bsmod;
529
530 if (c->fc->nb_streams < 1)
531 return 0;
532 st = c->fc->streams[c->fc->nb_streams-1];
533
534 ac3info = avio_rb24(pb);
535 bsmod = (ac3info >> 14) & 0x7;
536 acmod = (ac3info >> 11) & 0x7;
537 lfeon = (ac3info >> 10) & 0x1;
538 st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
539 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
540 if (lfeon)
541 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
542 st->codec->audio_service_type = bsmod;
543 if (st->codec->channels > 1 && bsmod == 0x7)
544 st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
545
546 return 0;
547 }
548
549 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
550 {
551 AVStream *st;
552 int eac3info, acmod, lfeon, bsmod;
553
554 if (c->fc->nb_streams < 1)
555 return 0;
556 st = c->fc->streams[c->fc->nb_streams-1];
557
558 /* No need to parse fields for additional independent substreams and its
559 * associated dependent substreams since libavcodec's E-AC-3 decoder
560 * does not support them yet. */
561 avio_rb16(pb); /* data_rate and num_ind_sub */
562 eac3info = avio_rb24(pb);
563 bsmod = (eac3info >> 12) & 0x1f;
564 acmod = (eac3info >> 9) & 0x7;
565 lfeon = (eac3info >> 8) & 0x1;
566 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
567 if (lfeon)
568 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
569 st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
570 st->codec->audio_service_type = bsmod;
571 if (st->codec->channels > 1 && bsmod == 0x7)
572 st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
573
574 return 0;
575 }
576
577 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
578 {
579 AVStream *st;
580
581 if (c->fc->nb_streams < 1)
582 return 0;
583 st = c->fc->streams[c->fc->nb_streams-1];
584
585 if (atom.size < 16)
586 return 0;
587
588 ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
589
590 return 0;
591 }
592
593 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
594 {
595 AVStream *st;
596
597 if (c->fc->nb_streams < 1)
598 return 0;
599 st = c->fc->streams[c->fc->nb_streams-1];
600
601 ff_get_wav_header(pb, st->codec, atom.size);
602
603 return 0;
604 }
605
606 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
607 {
608 const int num = avio_rb32(pb);
609 const int den = avio_rb32(pb);
610 AVStream *st;
611
612 if (c->fc->nb_streams < 1)
613 return 0;
614 st = c->fc->streams[c->fc->nb_streams-1];
615
616 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
617 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
618 av_log(c->fc, AV_LOG_WARNING,
619 "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
620 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
621 num, den);
622 } else if (den != 0) {
623 st->sample_aspect_ratio.num = num;
624 st->sample_aspect_ratio.den = den;
625 }
626 return 0;
627 }
628
629 /* this atom contains actual media data */
630 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
631 {
632 if (atom.size == 0) /* wrong one (MP4) */
633 return 0;
634 c->found_mdat=1;
635 return 0; /* now go for moov */
636 }
637
638 /* read major brand, minor version and compatible brands and store them as metadata */
639 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
640 {
641 uint32_t minor_ver;
642 int comp_brand_size;
643 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
644 char* comp_brands_str;
645 uint8_t type[5] = {0};
646
647 avio_read(pb, type, 4);
648 if (strcmp(type, "qt "))
649 c->isom = 1;
650 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
651 av_dict_set(&c->fc->metadata, "major_brand", type, 0);
652 minor_ver = avio_rb32(pb); /* minor version */
653 snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
654 av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
655
656 comp_brand_size = atom.size - 8;
657 if (comp_brand_size < 0)
658 return AVERROR_INVALIDDATA;
659 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
660 if (!comp_brands_str)
661 return AVERROR(ENOMEM);
662 avio_read(pb, comp_brands_str, comp_brand_size);
663 comp_brands_str[comp_brand_size] = 0;
664 av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
665 av_freep(&comp_brands_str);
666
667 return 0;
668 }
669
670 /* this atom should contain all header atoms */
671 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
672 {
673 int ret;
674
675 if ((ret = mov_read_default(c, pb, atom)) < 0)
676 return ret;
677 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
678 /* so we don't parse the whole file if over a network */
679 c->found_moov=1;
680 return 0; /* now go for mdat */
681 }
682
683 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
684 {
685 c->fragment.moof_offset = avio_tell(pb) - 8;
686 av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
687 return mov_read_default(c, pb, atom);
688 }
689
690 static void mov_metadata_creation_time(AVDictionary **metadata, time_t time)
691 {
692 char buffer[32];
693 if (time) {
694 struct tm *ptm;
695 time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
696 ptm = gmtime(&time);
697 if (!ptm) return;
698 strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
699 av_dict_set(metadata, "creation_time", buffer, 0);
700 }
701 }
702
703 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
704 {
705 AVStream *st;
706 MOVStreamContext *sc;
707 int version;
708 char language[4] = {0};
709 unsigned lang;
710 time_t creation_time;
711
712 if (c->fc->nb_streams < 1)
713 return 0;
714 st = c->fc->streams[c->fc->nb_streams-1];
715 sc = st->priv_data;
716
717 version = avio_r8(pb);
718 if (version > 1) {
719 avpriv_request_sample(c->fc, "Version %d", version);
720 return AVERROR_PATCHWELCOME;
721 }
722 avio_rb24(pb); /* flags */
723 if (version == 1) {
724 creation_time = avio_rb64(pb);
725 avio_rb64(pb);
726 } else {
727 creation_time = avio_rb32(pb);
728 avio_rb32(pb); /* modification time */
729 }
730 mov_metadata_creation_time(&st->metadata, creation_time);
731
732 sc->time_scale = avio_rb32(pb);
733 st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
734
735 lang = avio_rb16(pb); /* language */
736 if (ff_mov_lang_to_iso639(lang, language))
737 av_dict_set(&st->metadata, "language", language, 0);
738 avio_rb16(pb); /* quality */
739
740 return 0;
741 }
742
743 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
744 {
745 time_t creation_time;
746 int version = avio_r8(pb); /* version */
747 avio_rb24(pb); /* flags */
748
749 if (version == 1) {
750 creation_time = avio_rb64(pb);
751 avio_rb64(pb);
752 } else {
753 creation_time = avio_rb32(pb);
754 avio_rb32(pb); /* modification time */
755 }
756 mov_metadata_creation_time(&c->fc->metadata, creation_time);
757 c->time_scale = avio_rb32(pb); /* time scale */
758
759 av_dlog(c->fc, "time scale = %i\n", c->time_scale);
760
761 c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
762 avio_rb32(pb); /* preferred scale */
763
764 avio_rb16(pb); /* preferred volume */
765
766 avio_skip(pb, 10); /* reserved */
767
768 avio_skip(pb, 36); /* display matrix */
769
770 avio_rb32(pb); /* preview time */
771 avio_rb32(pb); /* preview duration */
772 avio_rb32(pb); /* poster time */
773 avio_rb32(pb); /* selection time */
774 avio_rb32(pb); /* selection duration */
775 avio_rb32(pb); /* current time */
776 avio_rb32(pb); /* next track ID */
777
778 return 0;
779 }
780
781 static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom)
782 {
783 AVStream *st;
784
785 if (c->fc->nb_streams < 1)
786 return 0;
787 st = c->fc->streams[c->fc->nb_streams-1];
788
789 if ((uint64_t)atom.size > (1<<30))
790 return AVERROR_INVALIDDATA;
791
792 // currently SVQ3 decoder expect full STSD header - so let's fake it
793 // this should be fixed and just SMI header should be passed
794 av_free(st->codec->extradata);
795 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
796 if (!st->codec->extradata)
797 return AVERROR(ENOMEM);
798 st->codec->extradata_size = 0x5a + atom.size;
799 memcpy(st->codec->extradata, "SVQ3", 4); // fake
800 avio_read(pb, st->codec->extradata + 0x5a, atom.size);
801 av_dlog(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
802 return 0;
803 }
804
805 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
806 {
807 AVStream *st;
808 int little_endian;
809
810 if (c->fc->nb_streams < 1)
811 return 0;
812 st = c->fc->streams[c->fc->nb_streams-1];
813
814 little_endian = avio_rb16(pb);
815 av_dlog(c->fc, "enda %d\n", little_endian);
816 if (little_endian == 1) {
817 switch (st->codec->codec_id) {
818 case AV_CODEC_ID_PCM_S24BE:
819 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
820 break;
821 case AV_CODEC_ID_PCM_S32BE:
822 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
823 break;
824 case AV_CODEC_ID_PCM_F32BE:
825 st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
826 break;
827 case AV_CODEC_ID_PCM_F64BE:
828 st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
829 break;
830 default:
831 break;
832 }
833 }
834 return 0;
835 }
836
837 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
838 {
839 AVStream *st;
840 unsigned mov_field_order;
841 enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
842
843 if (c->fc->nb_streams < 1) // will happen with jp2 files
844 return 0;
845 st = c->fc->streams[c->fc->nb_streams-1];
846 if (atom.size < 2)
847 return AVERROR_INVALIDDATA;
848 mov_field_order = avio_rb16(pb);
849 if ((mov_field_order & 0xFF00) == 0x0100)
850 decoded_field_order = AV_FIELD_PROGRESSIVE;
851 else if ((mov_field_order & 0xFF00) == 0x0200) {
852 switch (mov_field_order & 0xFF) {
853 case 0x01: decoded_field_order = AV_FIELD_TT;
854 break;
855 case 0x06: decoded_field_order = AV_FIELD_BB;
856 break;
857 case 0x09: decoded_field_order = AV_FIELD_TB;
858 break;
859 case 0x0E: decoded_field_order = AV_FIELD_BT;
860 break;
861 }
862 }
863 if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
864 av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
865 }
866 st->codec->field_order = decoded_field_order;
867
868 return 0;
869 }
870
871 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
872 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
873 {
874 AVStream *st;
875 uint64_t size;
876 uint8_t *buf;
877
878 if (c->fc->nb_streams < 1) // will happen with jp2 files
879 return 0;
880 st= c->fc->streams[c->fc->nb_streams-1];
881 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
882 if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
883 return AVERROR_INVALIDDATA;
884 buf= av_realloc(st->codec->extradata, size);
885 if (!buf)
886 return AVERROR(ENOMEM);
887 st->codec->extradata= buf;
888 buf+= st->codec->extradata_size;
889 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
890 AV_WB32( buf , atom.size + 8);
891 AV_WL32( buf + 4, atom.type);
892 avio_read(pb, buf + 8, atom.size);
893 return 0;
894 }
895
896 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
897 {
898 AVStream *st;
899
900 if (c->fc->nb_streams < 1)
901 return 0;
902 st = c->fc->streams[c->fc->nb_streams-1];
903
904 if ((uint64_t)atom.size > (1<<30))
905 return AVERROR_INVALIDDATA;
906
907 if (st->codec->codec_id == AV_CODEC_ID_QDM2 || st->codec->codec_id == AV_CODEC_ID_QDMC) {
908 // pass all frma atom to codec, needed at least for QDMC and QDM2
909 av_free(st->codec->extradata);
910 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
911 if (!st->codec->extradata)
912 return AVERROR(ENOMEM);
913 st->codec->extradata_size = atom.size;
914 avio_read(pb, st->codec->extradata, atom.size);
915 } else if (atom.size > 8) { /* to read frma, esds atoms */
916 int ret;
917 if ((ret = mov_read_default(c, pb, atom)) < 0)
918 return ret;
919 } else
920 avio_skip(pb, atom.size);
921 return 0;
922 }
923
924 /**
925 * This function reads atom content and puts data in extradata without tag
926 * nor size unlike mov_read_extradata.
927 */
928 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
929 {
930 AVStream *st;
931
932 if (c->fc->nb_streams < 1)
933 return 0;
934 st = c->fc->streams[c->fc->nb_streams-1];
935
936 if ((uint64_t)atom.size > (1<<30))
937 return AVERROR_INVALIDDATA;
938
939 if (atom.size >= 10) {
940 // Broken files created by legacy versions of libavformat will
941 // wrap a whole fiel atom inside of a glbl atom.
942 unsigned size = avio_rb32(pb);
943 unsigned type = avio_rl32(pb);
944 avio_seek(pb, -8, SEEK_CUR);
945 if (type == MKTAG('f','i','e','l') && size == atom.size)
946 return mov_read_default(c, pb, atom);
947 }
948 av_free(st->codec->extradata);
949 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
950 if (!st->codec->extradata)
951 return AVERROR(ENOMEM);
952 st->codec->extradata_size = atom.size;
953 avio_read(pb, st->codec->extradata, atom.size);
954 return 0;
955 }
956
957 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
958 {
959 AVStream *st;
960 uint8_t profile_level;
961
962 if (c->fc->nb_streams < 1)
963 return 0;
964 st = c->fc->streams[c->fc->nb_streams-1];
965
966 if (atom.size >= (1<<28) || atom.size < 7)
967 return AVERROR_INVALIDDATA;
968
969 profile_level = avio_r8(pb);
970 if ((profile_level & 0xf0) != 0xc0)
971 return 0;
972
973 av_free(st->codec->extradata);
974 st->codec->extradata = av_mallocz(atom.size - 7 + FF_INPUT_BUFFER_PADDING_SIZE);
975 if (!st->codec->extradata)
976 return AVERROR(ENOMEM);
977 st->codec->extradata_size = atom.size - 7;
978 avio_seek(pb, 6, SEEK_CUR);
979 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
980 return 0;
981 }
982
983 /**
984 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
985 * but can have extradata appended at the end after the 40 bytes belonging
986 * to the struct.
987 */
988 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
989 {
990 AVStream *st;
991
992 if (c->fc->nb_streams < 1)
993 return 0;
994 if (atom.size <= 40)
995 return 0;
996 st = c->fc->streams[c->fc->nb_streams-1];
997
998 if ((uint64_t)atom.size > (1<<30))
999 return AVERROR_INVALIDDATA;
1000
1001 av_free(st->codec->extradata);
1002 st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
1003 if (!st->codec->extradata)
1004 return AVERROR(ENOMEM);
1005 st->codec->extradata_size = atom.size - 40;
1006 avio_skip(pb, 40);
1007 avio_read(pb, st->codec->extradata, atom.size - 40);
1008 return 0;
1009 }
1010
1011 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1012 {
1013 AVStream *st;
1014 MOVStreamContext *sc;
1015 unsigned int i, entries;
1016
1017 if (c->fc->nb_streams < 1)
1018 return 0;
1019 st = c->fc->streams[c->fc->nb_streams-1];
1020 sc = st->priv_data;
1021
1022 avio_r8(pb); /* version */
1023 avio_rb24(pb); /* flags */
1024
1025 entries = avio_rb32(pb);
1026
1027 if (!entries)
1028 return 0;
1029 if (entries >= UINT_MAX/sizeof(int64_t))
1030 return AVERROR_INVALIDDATA;
1031
1032 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1033 if (!sc->chunk_offsets)
1034 return AVERROR(ENOMEM);
1035 sc->chunk_count = entries;
1036
1037 if (atom.type == MKTAG('s','t','c','o'))
1038 for (i = 0; i < entries && !pb->eof_reached; i++)
1039 sc->chunk_offsets[i] = avio_rb32(pb);
1040 else if (atom.type == MKTAG('c','o','6','4'))
1041 for (i = 0; i < entries && !pb->eof_reached; i++)
1042 sc->chunk_offsets[i] = avio_rb64(pb);
1043 else
1044 return AVERROR_INVALIDDATA;
1045
1046 sc->chunk_count = i;
1047
1048 if (pb->eof_reached)
1049 return AVERROR_EOF;
1050
1051 return 0;
1052 }
1053
1054 /**
1055 * Compute codec id for 'lpcm' tag.
1056 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1057 */
1058 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1059 {
1060 /* lpcm flags:
1061 * 0x1 = float
1062 * 0x2 = big-endian
1063 * 0x4 = signed
1064 */
1065 return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1066 }
1067
1068 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1069 {
1070 AVStream *st;
1071 MOVStreamContext *sc;
1072 int j, pseudo_stream_id;
1073
1074 if (c->fc->nb_streams < 1)
1075 return 0;
1076 st = c->fc->streams[c->fc->nb_streams-1];
1077 sc = st->priv_data;
1078
1079 for (pseudo_stream_id = 0;
1080 pseudo_stream_id < entries && !pb->eof_reached;
1081 pseudo_stream_id++) {
1082 //Parsing Sample description table
1083 enum AVCodecID id;
1084 int dref_id = 1;
1085 MOVAtom a = { AV_RL32("stsd") };
1086 int64_t start_pos = avio_tell(pb);
1087 uint32_t size = avio_rb32(pb); /* size */
1088 uint32_t format = avio_rl32(pb); /* data format */
1089
1090 if (size >= 16) {
1091 avio_rb32(pb); /* reserved */
1092 avio_rb16(pb); /* reserved */
1093 dref_id = avio_rb16(pb);
1094 } else {
1095 av_log(c->fc, AV_LOG_ERROR, "invalid size %d in stsd\n", size);
1096 return AVERROR_INVALIDDATA;
1097 }
1098
1099 if (st->codec->codec_tag &&
1100 st->codec->codec_tag != format &&
1101 (c->fc->video_codec_id ? ff_codec_get_id(ff_codec_movvideo_tags, format) != c->fc->video_codec_id
1102 : st->codec->codec_tag != MKTAG('j','p','e','g'))
1103 ){
1104 /* Multiple fourcc, we skip JPEG. This is not correct, we should
1105 * export it as a separate AVStream but this needs a few changes
1106 * in the MOV demuxer, patch welcome. */
1107 multiple_stsd:
1108 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1109 avio_skip(pb, size - (avio_tell(pb) - start_pos));
1110 continue;
1111 }
1112 /* we cannot demux concatenated h264 streams because of different extradata */
1113 if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1"))
1114 goto multiple_stsd;
1115 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1116 sc->dref_id= dref_id;
1117
1118 st->codec->codec_tag = format;
1119 id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1120 if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
1121 id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF);
1122
1123 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1124 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1125 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
1126 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
1127 id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1128 if (id <= 0)
1129 id = ff_codec_get_id(ff_codec_bmp_tags, format);
1130 if (id > 0)
1131 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1132 else if (st->codec->codec_type == AVMEDIA_TYPE_DATA){
1133 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1134 if (id > 0)
1135 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1136 }
1137 }
1138
1139 av_dlog(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
1140 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1141 (format >> 24) & 0xff, st->codec->codec_type);
1142
1143 if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1144 unsigned int color_depth, len;
1145 int color_greyscale;
1146 int color_table_id;
1147
1148 st->codec->codec_id = id;
1149 avio_rb16(pb); /* version */
1150 avio_rb16(pb); /* revision level */
1151 avio_rb32(pb); /* vendor */
1152 avio_rb32(pb); /* temporal quality */
1153 avio_rb32(pb); /* spatial quality */
1154
1155 st->codec->width = avio_rb16(pb); /* width */
1156 st->codec->height = avio_rb16(pb); /* height */
1157
1158 avio_rb32(pb); /* horiz resolution */
1159 avio_rb32(pb); /* vert resolution */
1160 avio_rb32(pb); /* data size, always 0 */
1161 avio_rb16(pb); /* frames per samples */
1162
1163 len = avio_r8(pb); /* codec name, pascal string */
1164 if (len > 31)
1165 len = 31;
1166 mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1167 if (len < 31)
1168 avio_skip(pb, 31 - len);
1169 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1170 if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1171 st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1172 /* Flash Media Server uses tag H263 with Sorenson Spark */
1173 if (format == MKTAG('H','2','6','3') &&
1174 !memcmp(st->codec->codec_name, "Sorenson H263", 13))
1175 st->codec->codec_id = AV_CODEC_ID_FLV1;
1176
1177 st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1178 color_table_id = avio_rb16(pb); /* colortable id */
1179 av_dlog(c->fc, "depth %d, ctab id %d\n",
1180 st->codec->bits_per_coded_sample, color_table_id);
1181 /* figure out the palette situation */
1182 color_depth = st->codec->bits_per_coded_sample & 0x1F;
1183 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1184
1185 /* if the depth is 2, 4, or 8 bpp, file is palettized */
1186 if ((color_depth == 2) || (color_depth == 4) ||
1187 (color_depth == 8)) {
1188 /* for palette traversal */
1189 unsigned int color_start, color_count, color_end;
1190 unsigned char r, g, b;
1191
1192 if (color_greyscale) {
1193 int color_index, color_dec;
1194 /* compute the greyscale palette */
1195 st->codec->bits_per_coded_sample = color_depth;
1196 color_count = 1 << color_depth;
1197 color_index = 255;
1198 color_dec = 256 / (color_count - 1);
1199 for (j = 0; j < color_count; j++) {
1200 r = g = b = color_index;
1201 sc->palette[j] =
1202 (r << 16) | (g << 8) | (b);
1203 color_index -= color_dec;
1204 if (color_index < 0)
1205 color_index = 0;
1206 }
1207 } else if (color_table_id) {
1208 const uint8_t *color_table;
1209 /* if flag bit 3 is set, use the default palette */
1210 color_count = 1 << color_depth;
1211 if (color_depth == 2)
1212 color_table = ff_qt_default_palette_4;
1213 else if (color_depth == 4)
1214 color_table = ff_qt_default_palette_16;
1215 else
1216 color_table = ff_qt_default_palette_256;
1217
1218 for (j = 0; j < color_count; j++) {
1219 r = color_table[j * 3 + 0];
1220 g = color_table[j * 3 + 1];
1221 b = color_table[j * 3 + 2];
1222 sc->palette[j] =
1223 (r << 16) | (g << 8) | (b);
1224 }
1225 } else {
1226 /* load the palette from the file */
1227 color_start = avio_rb32(pb);
1228 color_count = avio_rb16(pb);
1229 color_end = avio_rb16(pb);
1230 if ((color_start <= 255) &&
1231 (color_end <= 255)) {
1232 for (j = color_start; j <= color_end; j++) {
1233 /* each R, G, or B component is 16 bits;
1234 * only use the top 8 bits; skip alpha bytes
1235 * up front */
1236 avio_r8(pb);
1237 avio_r8(pb);
1238 r = avio_r8(pb);
1239 avio_r8(pb);
1240 g = avio_r8(pb);
1241 avio_r8(pb);
1242 b = avio_r8(pb);
1243 avio_r8(pb);
1244 sc->palette[j] =
1245 (r << 16) | (g << 8) | (b);
1246 }
1247 }
1248 }
1249 sc->has_palette = 1;
1250 }
1251 } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1252 int bits_per_sample, flags;
1253 uint16_t version = avio_rb16(pb);
1254
1255 st->codec->codec_id = id;
1256 avio_rb16(pb); /* revision level */
1257 avio_rb32(pb); /* vendor */
1258
1259 st->codec->channels = avio_rb16(pb); /* channel count */
1260 av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1261 st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1262
1263 sc->audio_cid = avio_rb16(pb);
1264 avio_rb16(pb); /* packet size = 0 */
1265
1266 st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1267
1268 //Read QT version 1 fields. In version 0 these do not exist.
1269 av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom);
1270 if (!c->isom) {
1271 if (version==1) {
1272 sc->samples_per_frame = avio_rb32(pb);
1273 avio_rb32(pb); /* bytes per packet */
1274 sc->bytes_per_frame = avio_rb32(pb);
1275 avio_rb32(pb); /* bytes per sample */
1276 } else if (version==2) {
1277 avio_rb32(pb); /* sizeof struct only */
1278 st->codec->sample_rate = av_int2double(avio_rb64(pb)); /* float 64 */
1279 st->codec->channels = avio_rb32(pb);
1280 avio_rb32(pb); /* always 0x7F000000 */
1281 st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
1282 flags = avio_rb32(pb); /* lpcm format specific flag */
1283 sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */
1284 sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */
1285 if (format == MKTAG('l','p','c','m'))
1286 st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1287 }
1288 }
1289
1290 switch (st->codec->codec_id) {
1291 case AV_CODEC_ID_PCM_S8:
1292 case AV_CODEC_ID_PCM_U8:
1293 if (st->codec->bits_per_coded_sample == 16)
1294 st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1295 break;
1296 case AV_CODEC_ID_PCM_S16LE:
1297 case AV_CODEC_ID_PCM_S16BE:
1298 if (st->codec->bits_per_coded_sample == 8)
1299 st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1300 else if (st->codec->bits_per_coded_sample == 24)
1301 st->codec->codec_id =
1302 st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1303 AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1304 break;
1305 /* set values for old format before stsd version 1 appeared */
1306 case AV_CODEC_ID_MACE3:
1307 sc->samples_per_frame = 6;
1308 sc->bytes_per_frame = 2*st->codec->channels;
1309 break;
1310 case AV_CODEC_ID_MACE6:
1311 sc->samples_per_frame = 6;
1312 sc->bytes_per_frame = 1*st->codec->channels;
1313 break;
1314 case AV_CODEC_ID_ADPCM_IMA_QT:
1315 sc->samples_per_frame = 64;
1316 sc->bytes_per_frame = 34*st->codec->channels;
1317 break;
1318 case AV_CODEC_ID_GSM:
1319 sc->samples_per_frame = 160;
1320 sc->bytes_per_frame = 33;
1321 break;
1322 default:
1323 break;
1324 }
1325
1326 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1327 if (bits_per_sample) {
1328 st->codec->bits_per_coded_sample = bits_per_sample;
1329 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1330 }
1331 } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1332 // ttxt stsd contains display flags, justification, background
1333 // color, fonts, and default styles, so fake an atom to read it
1334 MOVAtom fake_atom = { .size = size - (avio_tell(pb) - start_pos) };
1335 if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1336 mov_read_glbl(c, pb, fake_atom);
1337 st->codec->codec_id= id;
1338 st->codec->width = sc->width;
1339 st->codec->height = sc->height;
1340 } else {
1341 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1342 avio_skip(pb, size - (avio_tell(pb) - start_pos));
1343 }
1344 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1345 a.size = size - (avio_tell(pb) - start_pos);
1346 if (a.size > 8) {
1347 int ret;
1348 if ((ret = mov_read_default(c, pb, a)) < 0)
1349 return ret;
1350 } else if (a.size > 0)
1351 avio_skip(pb, a.size);
1352 }
1353
1354 if (pb->eof_reached)
1355 return AVERROR_EOF;
1356
1357 if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1358 st->codec->sample_rate= sc->time_scale;
1359
1360 /* special codec parameters handling */
1361 switch (st->codec->codec_id) {
1362 #if CONFIG_DV_DEMUXER
1363 case AV_CODEC_ID_DVAUDIO:
1364 c->dv_fctx = avformat_alloc_context();
1365 c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1366 if (!c->dv_demux) {
1367 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1368 return AVERROR(ENOMEM);
1369 }
1370 sc->dv_audio_container = 1;
1371 st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1372 break;
1373 #endif
1374 /* no ifdef since parameters are always those */
1375 case AV_CODEC_ID_QCELP:
1376 // force sample rate for qcelp when not stored in mov
1377 if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1378 st->codec->sample_rate = 8000;
1379 st->codec->channels= 1; /* really needed */
1380 break;
1381 case AV_CODEC_ID_AMR_NB:
1382 st->codec->channels= 1; /* really needed */
1383 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1384 st->codec->sample_rate = 8000;
1385 break;
1386 case AV_CODEC_ID_AMR_WB:
1387 st->codec->channels = 1;
1388 st->codec->sample_rate = 16000;
1389 break;
1390 case AV_CODEC_ID_MP2:
1391 case AV_CODEC_ID_MP3:
1392 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1393 st->need_parsing = AVSTREAM_PARSE_FULL;
1394 break;
1395 case AV_CODEC_ID_GSM:
1396 case AV_CODEC_ID_ADPCM_MS:
1397 case AV_CODEC_ID_ADPCM_IMA_WAV:
1398 case AV_CODEC_ID_ILBC:
1399 st->codec->block_align = sc->bytes_per_frame;
1400 break;
1401 case AV_CODEC_ID_ALAC:
1402 if (st->codec->extradata_size == 36) {
1403 st->codec->channels = AV_RB8 (st->codec->extradata+21);
1404 st->codec->sample_rate = AV_RB32(st->codec->extradata+32);
1405 }
1406 break;
1407 case AV_CODEC_ID_VC1:
1408 st->need_parsing = AVSTREAM_PARSE_FULL;
1409 break;
1410 default:
1411 break;
1412 }
1413
1414 return 0;
1415 }
1416
1417 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1418 {
1419 int entries;
1420
1421 avio_r8(pb); /* version */
1422 avio_rb24(pb); /* flags */
1423 entries = avio_rb32(pb);
1424
1425 return ff_mov_read_stsd_entries(c, pb, entries);
1426 }
1427
1428 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1429 {
1430 AVStream *st;
1431 MOVStreamContext *sc;
1432 unsigned int i, entries;
1433
1434 if (c->fc->nb_streams < 1)
1435 return 0;
1436 st = c->fc->streams[c->fc->nb_streams-1];
1437 sc = st->priv_data;
1438
1439 avio_r8(pb); /* version */
1440 avio_rb24(pb); /* flags */
1441
1442 entries = avio_rb32(pb);
1443
1444 av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1445
1446 if (!entries)
1447 return 0;
1448 if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1449 return AVERROR_INVALIDDATA;
1450 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1451 if (!sc->stsc_data)
1452 return AVERROR(ENOMEM);
1453
1454 for (i = 0; i < entries && !pb->eof_reached; i++) {
1455 sc->stsc_data[i].first = avio_rb32(pb);
1456 sc->stsc_data[i].count = avio_rb32(pb);
1457 sc->stsc_data[i].id = avio_rb32(pb);
1458 }
1459
1460 sc->stsc_count = i;
1461
1462 if (pb->eof_reached)
1463 return AVERROR_EOF;
1464
1465 return 0;
1466 }
1467
1468 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1469 {
1470 AVStream *st;
1471 MOVStreamContext *sc;
1472 unsigned i, entries;
1473
1474 if (c->fc->nb_streams < 1)
1475 return 0;
1476 st = c->fc->streams[c->fc->nb_streams-1];
1477 sc = st->priv_data;
1478
1479 avio_rb32(pb); // version + flags
1480
1481 entries = avio_rb32(pb);
1482 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1483 return AVERROR_INVALIDDATA;
1484 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1485 if (!sc->stps_data)
1486 return AVERROR(ENOMEM);
1487
1488 for (i = 0; i < entries && !pb->eof_reached; i++) {
1489 sc->stps_data[i] = avio_rb32(pb);
1490 //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1491 }
1492
1493 sc->stps_count = i;
1494
1495 if (pb->eof_reached)
1496 return AVERROR_EOF;
1497
1498 return 0;
1499 }
1500
1501 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1502 {
1503 AVStream *st;
1504 MOVStreamContext *sc;
1505 unsigned int i, entries;
1506
1507 if (c->fc->nb_streams < 1)
1508 return 0;
1509 st = c->fc->streams[c->fc->nb_streams-1];
1510 sc = st->priv_data;
1511
1512 avio_r8(pb); /* version */
1513 avio_rb24(pb); /* flags */
1514
1515 entries = avio_rb32(pb);
1516
1517 av_dlog(c->fc, "keyframe_count = %d\n", entries);
1518
1519 if (!entries)
1520 {
1521 sc->keyframe_absent = 1;
1522 return 0;
1523 }
1524 if (entries >= UINT_MAX / sizeof(int))
1525 return AVERROR_INVALIDDATA;
1526 sc->keyframes = av_malloc(entries * sizeof(int));
1527 if (!sc->keyframes)
1528 return AVERROR(ENOMEM);
1529
1530 for (i = 0; i < entries && !pb->eof_reached; i++) {
1531 sc->keyframes[i] = avio_rb32(pb);
1532 //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1533 }
1534
1535 sc->keyframe_count = i;
1536
1537 if (pb->eof_reached)
1538 return AVERROR_EOF;
1539
1540 return 0;
1541 }
1542
1543 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1544 {
1545 AVStream *st;
1546 MOVStreamContext *sc;
1547 unsigned int i, entries, sample_size, field_size, num_bytes;
1548 GetBitContext gb;
1549 unsigned char* buf;
1550
1551 if (c->fc->nb_streams < 1)
1552 return 0;
1553 st = c->fc->streams[c->fc->nb_streams-1];
1554 sc = st->priv_data;
1555
1556 avio_r8(pb); /* version */
1557 avio_rb24(pb); /* flags */
1558
1559 if (atom.type == MKTAG('s','t','s','z')) {
1560 sample_size = avio_rb32(pb);
1561 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1562 sc->sample_size = sample_size;
1563 field_size = 32;
1564 } else {
1565 sample_size = 0;
1566 avio_rb24(pb); /* reserved */
1567 field_size = avio_r8(pb);
1568 }
1569 entries = avio_rb32(pb);
1570
1571 av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1572
1573 sc->sample_count = entries;
1574 if (sample_size)
1575 return 0;
1576
1577 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1578 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1579 return AVERROR_INVALIDDATA;
1580 }
1581
1582 if (!entries)
1583 return 0;
1584 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1585 return AVERROR_INVALIDDATA;
1586 sc->sample_sizes = av_malloc(entries * sizeof(int));
1587 if (!sc->sample_sizes)
1588 return AVERROR(ENOMEM);
1589
1590 num_bytes = (entries*field_size+4)>>3;
1591
1592 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1593 if (!buf) {
1594 av_freep(&sc->sample_sizes);
1595 return AVERROR(ENOMEM);
1596 }
1597
1598 if (avio_read(pb, buf, num_bytes) < num_bytes) {
1599 av_freep(&sc->sample_sizes);
1600 av_free(buf);
1601 return AVERROR_INVALIDDATA;
1602 }
1603
1604 init_get_bits(&gb, buf, 8*num_bytes);
1605
1606 for (i = 0; i < entries && !pb->eof_reached; i++) {
1607 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1608 sc->data_size += sc->sample_sizes[i];
1609 }
1610
1611 sc->sample_count = i;
1612
1613 if (pb->eof_reached)
1614 return AVERROR_EOF;
1615
1616 av_free(buf);
1617 return 0;
1618 }
1619
1620 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1621 {
1622 AVStream *st;
1623 MOVStreamContext *sc;
1624 unsigned int i, entries;
1625 int64_t duration=0;
1626 int64_t total_sample_count=0;
1627
1628 if (c->fc->nb_streams < 1)
1629 return 0;
1630 st = c->fc->streams[c->fc->nb_streams-1];
1631 sc = st->priv_data;
1632
1633 avio_r8(pb); /* version */
1634 avio_rb24(pb); /* flags */
1635 entries = avio_rb32(pb);
1636
1637 av_dlog(c->fc, "track[%i].stts.entries = %i\n",
1638 c->fc->nb_streams-1, entries);
1639
1640 if (!entries)
1641 return 0;
1642 if (entries >= UINT_MAX / sizeof(*sc->stts_data))
1643 return AVERROR(EINVAL);
1644
1645 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1646 if (!sc->stts_data)
1647 return AVERROR(ENOMEM);
1648
1649 for (i = 0; i < entries && !pb->eof_reached; i++) {
1650 int sample_duration;
1651 int sample_count;
1652
1653 sample_count=avio_rb32(pb);
1654 sample_duration = avio_rb32(pb);
1655 sc->stts_data[i].count= sample_count;
1656 sc->stts_data[i].duration= sample_duration;
1657
1658 av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
1659 sample_count, sample_duration);
1660
1661 duration+=(int64_t)sample_duration*sample_count;
1662 total_sample_count+=sample_count;
1663 }
1664
1665 sc->stts_count = i;
1666
1667 if (pb->eof_reached)
1668 return AVERROR_EOF;
1669
1670 st->nb_frames= total_sample_count;
1671 if (duration)
1672 st->duration= duration;
1673 sc->track_end = duration;
1674 return 0;
1675 }
1676
1677 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1678 {
1679 AVStream *st;
1680 MOVStreamContext *sc;
1681 unsigned int i, entries;
1682
1683 if (c->fc->nb_streams < 1)
1684 return 0;
1685 st = c->fc->streams[c->fc->nb_streams-1];
1686 sc = st->priv_data;
1687
1688 avio_r8(pb); /* version */
1689 avio_rb24(pb); /* flags */
1690 entries = avio_rb32(pb);
1691
1692 av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1693
1694 if (!entries)
1695 return 0;
1696 if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
1697 return AVERROR_INVALIDDATA;
1698 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1699 if (!sc->ctts_data)
1700 return AVERROR(ENOMEM);
1701
1702 for (i = 0; i < entries && !pb->eof_reached; i++) {
1703 int count =avio_rb32(pb);
1704 int duration =avio_rb32(pb);
1705
1706 sc->ctts_data[i].count = count;
1707 sc->ctts_data[i].duration= duration;
1708 if (duration < 0)
1709 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1710 }
1711
1712 sc->ctts_count = i;
1713
1714 if (pb->eof_reached)
1715 return AVERROR_EOF;
1716
1717 av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
1718
1719 return 0;
1720 }
1721
1722 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1723 {
1724 AVStream *st;
1725 MOVStreamContext *sc;
1726 unsigned int i, entries;
1727 uint8_t version;
1728 uint32_t grouping_type;
1729
1730 if (c->fc->nb_streams < 1)
1731 return 0;
1732 st = c->fc->streams[c->fc->nb_streams-1];
1733 sc = st->priv_data;
1734
1735 version = avio_r8(pb); /* version */
1736 avio_rb24(pb); /* flags */
1737 grouping_type = avio_rl32(pb);
1738 if (grouping_type != MKTAG( 'r','a','p',' '))
1739 return 0; /* only support 'rap ' grouping */
1740 if (version == 1)
1741 avio_rb32(pb); /* grouping_type_parameter */
1742
1743 entries = avio_rb32(pb);
1744 if (!entries)
1745 return 0;
1746 if (entries >= UINT_MAX / sizeof(*sc->rap_group))
1747 return AVERROR_INVALIDDATA;
1748 sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
1749 if (!sc->rap_group)
1750 return AVERROR(ENOMEM);
1751
1752 for (i = 0; i < entries && !pb->eof_reached; i++) {
1753 sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
1754 sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
1755 }
1756
1757 sc->rap_group_count = i;
1758
1759 return pb->eof_reached ? AVERROR_EOF : 0;
1760 }
1761
1762 static void mov_build_index(MOVContext *mov, AVStream *st)
1763 {
1764 MOVStreamContext *sc = st->priv_data;
1765 int64_t current_offset;
1766 int64_t current_dts = 0;
1767 unsigned int stts_index = 0;
1768 unsigned int stsc_index = 0;
1769 unsigned int stss_index = 0;
1770 unsigned int stps_index = 0;
1771 unsigned int i, j;
1772 uint64_t stream_size = 0;
1773 AVIndexEntry *mem;
1774
1775 /* adjust first dts according to edit list */
1776 if (sc->time_offset && mov->time_scale > 0) {
1777 if (sc->time_offset < 0)
1778 sc->time_offset = av_rescale(sc->time_offset, sc->time_scale, mov->time_scale);
1779 current_dts = -sc->time_offset;
1780 if (sc->ctts_data && sc->stts_data && sc->stts_data[0].duration &&
1781 sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1782 /* more than 16 frames delay, dts are likely wrong
1783 this happens with files created by iMovie */
1784 sc->wrong_dts = 1;
1785 st->codec->has_b_frames = 1;
1786 }
1787 }
1788
1789 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1790 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1791 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1792 unsigned int current_sample = 0;
1793 unsigned int stts_sample = 0;
1794 unsigned int sample_size;
1795 unsigned int distance = 0;
1796 unsigned int rap_group_index = 0;
1797 unsigned int rap_group_sample = 0;
1798 int rap_group_present = sc->rap_group_count && sc->rap_group;
1799 int key_off = (sc->keyframes && sc->keyframes[0] > 0) || (sc->stps_data && sc->stps_data[0] > 0);
1800
1801 current_dts -= sc->dts_shift;
1802
1803 if (!sc->sample_count)
1804 return;
1805 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
1806 return;
1807 mem = av_realloc(st->index_entries, (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries));
1808 if (!mem)
1809 return;
1810 st->index_entries = mem;
1811 st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
1812
1813 for (i = 0; i < sc->chunk_count; i++) {
1814 current_offset = sc->chunk_offsets[i];
1815 while (stsc_index + 1 < sc->stsc_count &&
1816 i + 1 == sc->stsc_data[stsc_index + 1].first)
1817 stsc_index++;
1818 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1819 int keyframe = 0;
1820 if (current_sample >= sc->sample_count) {
1821 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1822 return;
1823 }
1824
1825 if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
1826 keyframe = 1;
1827 if (stss_index + 1 < sc->keyframe_count)
1828 stss_index++;
1829 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1830 keyframe = 1;
1831 if (stps_index + 1 < sc->stps_count)
1832 stps_index++;
1833 }
1834 if (rap_group_present && rap_group_index < sc->rap_group_count) {
1835 if (sc->rap_group[rap_group_index].index > 0)
1836 keyframe = 1;
1837 if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
1838 rap_group_sample = 0;
1839 rap_group_index++;
1840 }
1841 }
1842 if (keyframe)
1843 distance = 0;
1844 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1845 if (sc->pseudo_stream_id == -1 ||
1846 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1847 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1848 e->pos = current_offset;
1849 e->timestamp = current_dts;
1850 e->size = sample_size;
1851 e->min_distance = distance;
1852 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1853 av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1854 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1855 current_offset, current_dts, sample_size, distance, keyframe);
1856 }
1857
1858 current_offset += sample_size;
1859 stream_size += sample_size;
1860 current_dts += sc->stts_data[stts_index].duration;
1861 distance++;
1862 stts_sample++;
1863 current_sample++;
1864 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1865 stts_sample = 0;
1866 stts_index++;
1867 }
1868 }
1869 }
1870 if (st->duration > 0)
1871 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1872 } else {
1873 unsigned chunk_samples, total = 0;
1874
1875 // compute total chunk count
1876 for (i = 0; i < sc->stsc_count; i++) {
1877 unsigned count, chunk_count;
1878
1879 chunk_samples = sc->stsc_data[i].count;
1880 if (i != sc->stsc_count - 1 &&
1881 sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1882 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1883 return;
1884 }
1885
1886 if (sc->samples_per_frame >= 160) { // gsm
1887 count = chunk_samples / sc->samples_per_frame;
1888 } else if (sc->samples_per_frame > 1) {
1889 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1890 count = (chunk_samples+samples-1) / samples;
1891 } else {
1892 count = (chunk_samples+1023) / 1024;
1893 }
1894
1895 if (i < sc->stsc_count - 1)
1896 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1897 else
1898 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1899 total += chunk_count * count;
1900 }
1901
1902 av_dlog(mov->fc, "chunk count %d\n", total);
1903 if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
1904 return;
1905 mem = av_realloc(st->index_entries, (st->nb_index_entries + total) * sizeof(*st->index_entries));
1906 if (!mem)
1907 return;
1908 st->index_entries = mem;
1909 st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
1910
1911 // populate index
1912 for (i = 0; i < sc->chunk_count; i++) {
1913 current_offset = sc->chunk_offsets[i];
1914 if (stsc_index + 1 < sc->stsc_count &&
1915 i + 1 == sc->stsc_data[stsc_index + 1].first)
1916 stsc_index++;
1917 chunk_samples = sc->stsc_data[stsc_index].count;
1918
1919 while (chunk_samples > 0) {
1920 AVIndexEntry *e;
1921 unsigned size, samples;
1922
1923 if (sc->samples_per_frame >= 160) { // gsm
1924 samples = sc->samples_per_frame;
1925 size = sc->bytes_per_frame;
1926 } else {
1927 if (sc->samples_per_frame > 1) {
1928 samples = FFMIN((1024 / sc->samples_per_frame)*
1929 sc->samples_per_frame, chunk_samples);
1930 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1931 } else {
1932 samples = FFMIN(1024, chunk_samples);
1933 size = samples * sc->sample_size;
1934 }
1935 }
1936
1937 if (st->nb_index_entries >= total) {
1938 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1939 return;
1940 }
1941 e = &st->index_entries[st->nb_index_entries++];
1942 e->pos = current_offset;
1943 e->timestamp = current_dts;
1944 e->size = size;
1945 e->min_distance = 0;
1946 e->flags = AVINDEX_KEYFRAME;
1947 av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1948 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1949 size, samples);
1950
1951 current_offset += size;
1952 current_dts += samples;
1953 chunk_samples -= samples;
1954 }
1955 }
1956 }
1957 }
1958
1959 static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref,
1960 AVIOInterruptCB *int_cb)
1961 {
1962 /* try relative path, we do not try the absolute because it can leak information about our
1963 system to an attacker */
1964 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1965 char filename[1024];
1966 char *src_path;
1967 int i, l;
1968
1969 /* find a source dir */
1970 src_path = strrchr(src, '/');
1971 if (src_path)
1972 src_path++;
1973 else
1974 src_path = src;
1975
1976 /* find a next level down to target */
1977 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1978 if (ref->path[l] == '/') {
1979 if (i == ref->nlvl_to - 1)
1980 break;
1981 else
1982 i++;
1983 }
1984
1985 /* compose filename if next level down to target was found */
1986 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
1987 memcpy(filename, src, src_path - src);
1988 filename[src_path - src] = 0;
1989
1990 for (i = 1; i < ref->nlvl_from; i++)
1991 av_strlcat(filename, "../", 1024);
1992
1993 av_strlcat(filename, ref->path + l + 1, 1024);
1994
1995 if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
1996 return 0;
1997 }
1998 }
1999
2000 return AVERROR(ENOENT);
2001 }
2002
2003 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2004 {
2005 AVStream *st;
2006 MOVStreamContext *sc;
2007 int ret;
2008
2009 st = avformat_new_stream(c->fc, NULL);
2010 if (!st) return AVERROR(ENOMEM);
2011 st->id = c->fc->nb_streams;
2012 sc = av_mallocz(sizeof(MOVStreamContext));
2013 if (!sc) return AVERROR(ENOMEM);
2014
2015 st->priv_data = sc;
2016 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2017 sc->ffindex = st->index;
2018
2019 if ((ret = mov_read_default(c, pb, atom)) < 0)
2020 return ret;
2021
2022 /* sanity checks */
2023 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2024 (!sc->sample_size && !sc->sample_count))) {
2025 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2026 st->index);
2027 return 0;
2028 }
2029
2030 if (sc->time_scale <= 0) {
2031 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
2032 sc->time_scale = c->time_scale;
2033 if (sc->time_scale <= 0)
2034 sc->time_scale = 1;
2035 }
2036
2037 avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2038
2039 mov_build_index(c, st);
2040
2041 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2042 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2043 if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback) < 0)
2044 av_log(c->fc, AV_LOG_ERROR,
2045 "stream %d, error opening alias: path='%s', dir='%s', "
2046 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2047 st->index, dref->path, dref->dir, dref->filename,
2048 dref->volume, dref->nlvl_from, dref->nlvl_to);
2049 } else
2050 sc->pb = c->fc->pb;
2051
2052 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2053 if (!st->sample_aspect_ratio.num &&
2054 (st->codec->width != sc->width || st->codec->height != sc->height)) {
2055 st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2056 ((double)st->codec->width * sc->height), INT_MAX);
2057 }
2058
2059 if (st->duration != AV_NOPTS_VALUE)
2060 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2061 sc->time_scale*st->nb_frames, st->duration, INT_MAX);
2062 }
2063
2064 switch (st->codec->codec_id) {
2065 #if CONFIG_H261_DECODER
2066 case AV_CODEC_ID_H261:
2067 #endif
2068 #if CONFIG_H263_DECODER
2069 case AV_CODEC_ID_H263:
2070 #endif
2071 #if CONFIG_MPEG4_DECODER
2072 case AV_CODEC_ID_MPEG4:
2073 #endif
2074 st->codec->width = 0; /* let decoder init width/height */
2075 st->codec->height= 0;
2076 break;
2077 }
2078
2079 /* Do not need those anymore. */
2080 av_freep(&sc->chunk_offsets);
2081 av_freep(&sc->stsc_data);
2082 av_freep(&sc->sample_sizes);
2083 av_freep(&sc->keyframes);
2084 av_freep(&sc->stts_data);
2085 av_freep(&sc->stps_data);
2086 av_freep(&sc->rap_group);
2087
2088 return 0;
2089 }
2090
2091 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2092 {
2093 int ret;
2094 c->itunes_metadata = 1;
2095 ret = mov_read_default(c, pb, atom);
2096 c->itunes_metadata = 0;
2097 return ret;
2098 }
2099
2100 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2101 {
2102 while (atom.size > 8) {
2103 uint32_t tag = avio_rl32(pb);
2104 atom.size -= 4;
2105 if (tag == MKTAG('h','d','l','r')) {
2106 avio_seek(pb, -8, SEEK_CUR);
2107 atom.size += 8;
2108 return mov_read_default(c, pb, atom);
2109 }
2110 }
2111 return 0;
2112 }
2113
2114 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2115 {
2116 int i;
2117 int width;
2118 int height;
2119 int64_t disp_transform[2];
2120 int display_matrix[3][2];
2121 AVStream *st;
2122 MOVStreamContext *sc;
2123 int version;
2124
2125 if (c->fc->nb_streams < 1)
2126 return 0;
2127 st = c->fc->streams[c->fc->nb_streams-1];
2128 sc = st->priv_data;
2129
2130 version = avio_r8(pb);
2131 avio_rb24(pb); /* flags */
2132 /*
2133 MOV_TRACK_ENABLED 0x0001
2134 MOV_TRACK_IN_MOVIE 0x0002
2135 MOV_TRACK_IN_PREVIEW 0x0004
2136 MOV_TRACK_IN_POSTER 0x0008
2137 */
2138
2139 if (version == 1) {
2140 avio_rb64(pb);
2141 avio_rb64(pb);
2142 } else {
2143 avio_rb32(pb); /* creation time */
2144 avio_rb32(pb); /* modification time */
2145 }
2146 st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2147 avio_rb32(pb); /* reserved */
2148
2149 /* highlevel (considering edits) duration in movie timebase */
2150 (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2151 avio_rb32(pb); /* reserved */
2152 avio_rb32(pb); /* reserved */
2153
2154 avio_rb16(pb); /* layer */
2155 avio_rb16(pb); /* alternate group */
2156 avio_rb16(pb); /* volume */
2157 avio_rb16(pb); /* reserved */
2158
2159 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2160 // they're kept in fixed point format through all calculations
2161 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
2162 for (i = 0; i < 3; i++) {
2163 display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2164 display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2165 avio_rb32(pb); // 2.30 fixed point (not used)
2166 }
2167
2168 width = avio_rb32(pb); // 16.16 fixed point track width
2169 height = avio_rb32(pb); // 16.16 fixed point track height
2170 sc->width = width >> 16;
2171 sc->height = height >> 16;
2172
2173 // transform the display width/height according to the matrix
2174 // skip this if the display matrix is the default identity matrix
2175 // or if it is rotating the picture, ex iPhone 3GS
2176 // to keep the same scale, use [width height 1<<16]
2177 if (width && height &&
2178 ((display_matrix[0][0] != 65536 ||
2179 display_matrix[1][1] != 65536) &&
2180 !display_matrix[0][1] &&
2181 !display_matrix[1][0] &&
2182 !display_matrix[2][0] && !display_matrix[2][1])) {
2183 for (i = 0; i < 2; i++)
2184 disp_transform[i] =
2185 (int64_t) width * display_matrix[0][i] +
2186 (int64_t) height * display_matrix[1][i] +
2187 ((int64_t) display_matrix[2][i] << 16);
2188
2189 //sample aspect ratio is new width/height divided by old width/height
2190 st->sample_aspect_ratio = av_d2q(
2191 ((double) disp_transform[0] * height) /
2192 ((double) disp_transform[1] * width), INT_MAX);
2193 }
2194 return 0;
2195 }
2196
2197 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2198 {
2199 MOVFragment *frag = &c->fragment;
2200 MOVTrackExt *trex = NULL;
2201 int flags, track_id, i;
2202
2203 avio_r8(pb); /* version */
2204 flags = avio_rb24(pb);
2205
2206 track_id = avio_rb32(pb);
2207 if (!track_id)
2208 return AVERROR_INVALIDDATA;
2209 frag->track_id = track_id;
2210 for (i = 0; i < c->trex_count; i++)
2211 if (c->trex_data[i].track_id == frag->track_id) {
2212 trex = &c->trex_data[i];
2213 break;
2214 }
2215 if (!trex) {
2216 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2217 return AVERROR_INVALIDDATA;
2218 }
2219
2220 frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
2221 avio_rb64(pb) : frag->moof_offset;
2222 frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2223
2224 frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2225 avio_rb32(pb) : trex->duration;
2226 frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2227 avio_rb32(pb) : trex->size;
2228 frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2229 avio_rb32(pb) : trex->flags;
2230 av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2231 return 0;
2232 }
2233
2234 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2235 {
2236 c->chapter_track = avio_rb32(pb);
2237 return 0;
2238 }
2239
2240 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2241 {
2242 MOVTrackExt *trex;
2243
2244 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2245 return AVERROR_INVALIDDATA;
2246 trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
2247 if (!trex)
2248 return AVERROR(ENOMEM);
2249 c->trex_data = trex;
2250 trex = &c->trex_data[c->trex_count++];
2251 avio_r8(pb); /* version */
2252 avio_rb24(pb); /* flags */
2253 trex->track_id = avio_rb32(pb);
2254 trex->stsd_id = avio_rb32(pb);
2255 trex->duration = avio_rb32(pb);
2256 trex->size = avio_rb32(pb);
2257 trex->flags = avio_rb32(pb);
2258 return 0;
2259 }
2260
2261 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2262 {
2263 MOVFragment *frag = &c->fragment;
2264 AVStream *st = NULL;
2265 MOVStreamContext *sc;
2266 MOVStts *ctts_data;
2267 uint64_t offset;
2268 int64_t dts;
2269 int data_offset = 0;
2270 unsigned entries, first_sample_flags = frag->flags;
2271 int flags, distance, i, found_keyframe = 0;
2272
2273 for (i = 0; i < c->fc->nb_streams; i++) {
2274 if (c->fc->streams[i]->id == frag->track_id) {
2275 st = c->fc->streams[i];
2276 break;
2277 }
2278 }
2279 if (!st) {
2280 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2281 return AVERROR_INVALIDDATA;
2282 }
2283 sc = st->priv_data;
2284 if (sc->pseudo_stream_id+1 != frag->stsd_id)
2285 return 0;
2286 avio_r8(pb); /* version */
2287 flags = avio_rb24(pb);
2288 entries = avio_rb32(pb);
2289 av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2290
2291 /* Always assume the presence of composition time offsets.
2292 * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2293 * 1) in the initial movie, there are no samples.
2294 * 2) in the first movie fragment, there is only one sample without composition time offset.
2295 * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2296 if (!sc->ctts_count && sc->sample_count)
2297 {
2298 /* Complement ctts table if moov atom doesn't have ctts atom. */
2299 ctts_data = av_malloc(sizeof(*sc->ctts_data));
2300 if (!ctts_data)
2301 return AVERROR(ENOMEM);
2302 sc->ctts_data = ctts_data;
2303 sc->ctts_data[sc->ctts_count].count = sc->sample_count;
2304 sc->ctts_data[sc->ctts_count].duration = 0;
2305 sc->ctts_count++;
2306 }
2307 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2308 return AVERROR_INVALIDDATA;
2309 ctts_data = av_realloc(sc->ctts_data,
2310 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2311 if (!ctts_data)
2312 return AVERROR(ENOMEM);
2313 sc->ctts_data = ctts_data;
2314
2315 if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
2316 if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
2317 dts = sc->track_end - sc->time_offset;
2318 offset = frag->base_data_offset + data_offset;
2319 distance = 0;
2320 av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2321 for (i = 0; i < entries && !pb->eof_reached; i++) {
2322 unsigned sample_size = frag->size;
2323 int sample_flags = i ? frag->flags : first_sample_flags;
2324 unsigned sample_duration = frag->duration;
2325 int keyframe = 0;
2326
2327 if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
2328 if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
2329 if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
2330 sc->ctts_data[sc->ctts_count].count = 1;
2331 sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
2332 avio_rb32(pb) : 0;
2333 sc->ctts_count++;
2334 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2335 keyframe = 1;
2336 else if (!found_keyframe)
2337 keyframe = found_keyframe =
2338 !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
2339 MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
2340 if (keyframe)
2341 distance = 0;
2342 av_add_index_entry(st, offset, dts, sample_size, distance,
2343 keyframe ? AVINDEX_KEYFRAME : 0);
2344 av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2345 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2346 offset, dts, sample_size, distance, keyframe);
2347 distance++;
2348 dts += sample_duration;
2349 offset += sample_size;
2350 sc->data_size += sample_size;
2351 }
2352
2353 if (pb->eof_reached)
2354 return AVERROR_EOF;
2355
2356 frag->moof_offset = offset;
2357 st->duration = sc->track_end = dts + sc->time_offset;
2358 return 0;
2359 }
2360
2361 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2362 /* like the files created with Adobe Premiere 5.0, for samples see */
2363 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2364 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2365 {
2366 int err;
2367
2368 if (atom.size < 8)
2369 return 0; /* continue */
2370 if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2371 avio_skip(pb, atom.size - 4);
2372 return 0;
2373 }
2374 atom.type = avio_rl32(pb);
2375 atom.size -= 8;
2376 if (atom.type != MKTAG('m','d','a','t')) {
2377 avio_skip(pb, atom.size);
2378 return 0;
2379 }
2380 err = mov_read_mdat(c, pb, atom);
2381 return err;
2382 }
2383
2384 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2385 {
2386 #if CONFIG_ZLIB
2387 AVIOContext ctx;
2388 uint8_t *cmov_data;
2389 uint8_t *moov_data; /* uncompressed data */
2390 long cmov_len, moov_len;
2391 int ret = -1;
2392
2393 avio_rb32(pb); /* dcom atom */
2394 if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2395 return AVERROR_INVALIDDATA;
2396 if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2397 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2398 return AVERROR_INVALIDDATA;
2399 }
2400 avio_rb32(pb); /* cmvd atom */
2401 if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2402 return AVERROR_INVALIDDATA;
2403 moov_len = avio_rb32(pb); /* uncompressed size */
2404 cmov_len = atom.size - 6 * 4;
2405
2406 cmov_data = av_malloc(cmov_len);
2407 if (!cmov_data)
2408 return AVERROR(ENOMEM);
2409 moov_data = av_malloc(moov_len);
2410 if (!moov_data) {
2411 av_free(cmov_data);
2412 return AVERROR(ENOMEM);
2413 }
2414 avio_read(pb, cmov_data, cmov_len);
2415 if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2416 goto free_and_return;
2417 if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2418 goto free_and_return;
2419 atom.type = MKTAG('m','o','o','v');
2420 atom.size = moov_len;
2421 ret = mov_read_default(c, &ctx, atom);
2422 free_and_return:
2423 av_free(moov_data);
2424 av_free(cmov_data);
2425 return ret;
2426 #else
2427 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2428 return AVERROR(ENOSYS);
2429 #endif
2430 }
2431
2432 /* edit list atom */
2433 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2434 {
2435 MOVStreamContext *sc;
2436 int i, edit_count, version;
2437
2438 if (c->fc->nb_streams < 1)
2439 return 0;
2440 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2441
2442 version = avio_r8(pb); /* version */
2443 avio_rb24(pb); /* flags */
2444 edit_count = avio_rb32(pb); /* entries */
2445
2446 if ((uint64_t)edit_count*12+8 > atom.size)
2447 return AVERROR_INVALIDDATA;
2448
2449 for (i=0; i<edit_count; i++){
2450 int64_t time;
2451 int64_t duration;
2452 if (version == 1) {
2453 duration = avio_rb64(pb);
2454 time = avio_rb64(pb);
2455 } else {
2456 duration = avio_rb32(pb); /* segment duration */
2457 time = (int32_t)avio_rb32(pb); /* media time */
2458 }
2459 avio_rb32(pb); /* Media rate */
2460 if (i == 0 && time >= -1) {
2461 sc->time_offset = time != -1 ? time : -duration;
2462 }
2463 }
2464
2465 if (edit_count > 1)
2466 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2467 "a/v desync might occur, patch welcome\n");
2468
2469 av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2470 return 0;
2471 }
2472
2473 static const MOVParseTableEntry mov_default_parse_table[] = {
2474 { MKTAG('a','v','s','s'), mov_read_extradata },
2475 { MKTAG('c','h','p','l'), mov_read_chpl },
2476 { MKTAG('c','o','6','4'), mov_read_stco },
2477 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2478 { MKTAG('d','i','n','f'), mov_read_default },
2479 { MKTAG('d','r','e','f'), mov_read_dref },
2480 { MKTAG('e','d','t','s'), mov_read_default },
2481 { MKTAG('e','l','s','t'), mov_read_elst },
2482 { MKTAG('e','n','d','a'), mov_read_enda },
2483 { MKTAG('f','i','e','l'), mov_read_fiel },
2484 { MKTAG('f','t','y','p'), mov_read_ftyp },
2485 { MKTAG('g','l','b','l'), mov_read_glbl },
2486 { MKTAG('h','d','l','r'), mov_read_hdlr },
2487 { MKTAG('i','l','s','t'), mov_read_ilst },
2488 { MKTAG('j','p','2','h'), mov_read_extradata },
2489 { MKTAG('m','d','a','t'), mov_read_mdat },
2490 { MKTAG('m','d','h','d'), mov_read_mdhd },
2491 { MKTAG('m','d','i','a'), mov_read_default },
2492 { MKTAG('m','e','t','a'), mov_read_meta },
2493 { MKTAG('m','i','n','f'), mov_read_default },
2494 { MKTAG('m','o','o','f'), mov_read_moof },
2495 { MKTAG('m','o','o','v'), mov_read_moov },
2496 { MKTAG('m','v','e','x'), mov_read_default },
2497 { MKTAG('m','v','h','d'), mov_read_mvhd },
2498 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2499 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2500 { MKTAG('a','v','c','C'), mov_read_glbl },
2501 { MKTAG('p','a','s','p'), mov_read_pasp },
2502 { MKTAG('s','t','b','l'), mov_read_default },
2503 { MKTAG('s','t','c','o'), mov_read_stco },
2504 { MKTAG('s','t','p','s'), mov_read_stps },
2505 { MKTAG('s','t','r','f'), mov_read_strf },
2506 { MKTAG('s','t','s','c'), mov_read_stsc },
2507 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2508 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2509 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2510 { MKTAG('s','t','t','s'), mov_read_stts },
2511 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2512 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2513 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2514 { MKTAG('t','r','a','k'), mov_read_trak },
2515 { MKTAG('t','r','a','f'), mov_read_default },
2516 { MKTAG('t','r','e','f'), mov_read_default },
2517 { MKTAG('c','h','a','p'), mov_read_chap },
2518 { MKTAG('t','r','e','x'), mov_read_trex },
2519 { MKTAG('t','r','u','n'), mov_read_trun },
2520 { MKTAG('u','d','t','a'), mov_read_default },
2521 { MKTAG('w','a','v','e'), mov_read_wave },
2522 { MKTAG('e','s','d','s'), mov_read_esds },
2523 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2524 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
2525 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2526 { MKTAG('w','f','e','x'), mov_read_wfex },
2527 { MKTAG('c','m','o','v'), mov_read_cmov },
2528 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
2529 { MKTAG('d','v','c','1'), mov_read_dvc1 },
2530 { MKTAG('s','b','g','p'), mov_read_sbgp },
2531 { 0, NULL }
2532 };
2533
2534 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2535 {
2536 int64_t total_size = 0;
2537 MOVAtom a;
2538 int i;
2539
2540 if (atom.size < 0)
2541 atom.size = INT64_MAX;
2542 while (total_size + 8 < atom.size && !pb->eof_reached) {
2543 int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
2544 a.size = atom.size;
2545 a.type=0;
2546 if (atom.size >= 8) {
2547 a.size = avio_rb32(pb);
2548 a.type = avio_rl32(pb);
2549 }
2550 av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
2551 a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
2552 total_size += 8;
2553 if (a.size == 1) { /* 64 bit extended size */
2554 a.size = avio_rb64(pb) - 8;
2555 total_size += 8;
2556 }
2557 if (a.size == 0) {
2558 a.size = atom.size - total_size;
2559 if (a.size <= 8)
2560 break;
2561 }
2562 a.size -= 8;
2563 if (a.size < 0)
2564 break;
2565 a.size = FFMIN(a.size, atom.size - total_size);
2566
2567 for (i = 0; mov_default_parse_table[i].type; i++)
2568 if (mov_default_parse_table[i].type == a.type) {
2569 parse = mov_default_parse_table[i].parse;
2570 break;
2571 }
2572
2573 // container is user data
2574 if (!parse && (atom.type == MKTAG('u','d','t','a') ||
2575 atom.type == MKTAG('i','l','s','t')))
2576 parse = mov_read_udta_string;
2577
2578 if (!parse) { /* skip leaf atoms data */
2579 avio_skip(pb, a.size);
2580 } else {
2581 int64_t start_pos = avio_tell(pb);
2582 int64_t left;
2583 int err = parse(c, pb, a);
2584 if (err < 0)
2585 return err;
2586 if (c->found_moov && c->found_mdat &&
2587 ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
2588 start_pos + a.size == avio_size(pb))) {
2589 if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
2590 c->next_root_atom = start_pos + a.size;
2591 return 0;
2592 }
2593 left = a.size - avio_tell(pb) + start_pos;
2594 if (left > 0) /* skip garbage at atom end */
2595 avio_skip(pb, left);
2596 }
2597
2598 total_size += a.size;
2599 }
2600
2601 if (total_size < atom.size && atom.size < 0x7ffff)
2602 avio_skip(pb, atom.size - total_size);
2603
2604 return 0;
2605 }
2606
2607 static int mov_probe(AVProbeData *p)
2608 {
2609 unsigned int offset;
2610 uint32_t tag;
2611 int score = 0;
2612
2613 /* check file header */
2614 offset = 0;
2615 for (;;) {
2616 /* ignore invalid offset */
2617 if ((offset + 8) > (unsigned int)p->buf_size)
2618 return score;
2619 tag = AV_RL32(p->buf + offset + 4);
2620 switch(tag) {
2621 /* check for obvious tags */
2622 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2623 case MKTAG('m','o','o','v'):
2624 case MKTAG('m','d','a','t'):
2625 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2626 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2627 case MKTAG('f','t','y','p'):
2628 return AVPROBE_SCORE_MAX;
2629 /* those are more common words, so rate then a bit less */
2630 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2631 case MKTAG('w','i','d','e'):
2632 case MKTAG('f','r','e','e'):
2633 case MKTAG('j','u','n','k'):
2634 case MKTAG('p','i','c','t'):
2635 return AVPROBE_SCORE_MAX - 5;
2636 case MKTAG(0x82,0x82,0x7f,0x7d):
2637 case MKTAG('s','k','i','p'):
2638 case MKTAG('u','u','i','d'):
2639 case MKTAG('p','r','f','l'):
2640 offset = AV_RB32(p->buf+offset) + offset;
2641 /* if we only find those cause probedata is too small at least rate them */
2642 score = AVPROBE_SCORE_EXTENSION;
2643 break;
2644 default:
2645 /* unrecognized tag */
2646 return score;
2647 }
2648 }
2649 }
2650
2651 // must be done after parsing all trak because there's no order requirement
2652 static void mov_read_chapters(AVFormatContext *s)
2653 {
2654 MOVContext *mov = s->priv_data;
2655 AVStream *st = NULL;
2656 MOVStreamContext *sc;
2657 int64_t cur_pos;
2658 int i;
2659
2660 for (i = 0; i < s->nb_streams; i++)
2661 if (s->streams[i]->id == mov->chapter_track) {
2662 st = s->streams[i];
2663 break;
2664 }
2665 if (!st) {
2666 av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2667 return;
2668 }
2669
2670 st->discard = AVDISCARD_ALL;
2671 sc = st->priv_data;
2672 cur_pos = avio_tell(sc->pb);
2673
2674 for (i = 0; i < st->nb_index_entries; i++) {
2675 AVIndexEntry *sample = &st->index_entries[i];
2676 int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2677 uint8_t *title;
2678 uint16_t ch;
2679 int len, title_len;
2680
2681 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2682 av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2683 goto finish;
2684 }
2685
2686 // the first two bytes are the length of the title
2687 len = avio_rb16(sc->pb);
2688 if (len > sample->size-2)
2689 continue;
2690 title_len = 2*len + 1;
2691 if (!(title = av_mallocz(title_len)))
2692 goto finish;
2693
2694 // The samples could theoretically be in any encoding if there's an encd
2695 // atom following, but in practice are only utf-8 or utf-16, distinguished
2696 // instead by the presence of a BOM
2697 if (!len) {
2698 title[0] = 0;
2699 } else {
2700 ch = avio_rb16(sc->pb);
2701 if (ch == 0xfeff)
2702 avio_get_str16be(sc->pb, len, title, title_len);
2703 else if (ch == 0xfffe)
2704 avio_get_str16le(sc->pb, len, title, title_len);
2705 else {
2706 AV_WB16(title, ch);
2707 if (len == 1 || len == 2)
2708 title[len] = 0;
2709 else
2710 avio_get_str(sc->pb, len - 2, title + 2, title_len - 2);
2711 }
2712 }
2713
2714 avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
2715 av_freep(&title);
2716 }
2717 finish:
2718 avio_seek(sc->pb, cur_pos, SEEK_SET);
2719 }
2720
2721 static int mov_read_close(AVFormatContext *s)
2722 {
2723 MOVContext *mov = s->priv_data;
2724 int i, j;
2725
2726 for (i = 0; i < s->nb_streams; i++) {
2727 AVStream *st = s->streams[i];
2728 MOVStreamContext *sc = st->priv_data;
2729
2730 av_freep(&sc->ctts_data);
2731 for (j = 0; j < sc->drefs_count; j++) {
2732 av_freep(&sc->drefs[j].path);
2733 av_freep(&sc->drefs[j].dir);
2734 }
2735 av_freep(&sc->drefs);
2736 if (sc->pb && sc->pb != s->pb)
2737 avio_close(sc->pb);
2738 }
2739
2740 if (mov->dv_demux) {
2741 for (i = 0; i < mov->dv_fctx->nb_streams; i++) {
2742 av_freep(&mov->dv_fctx->streams[i]->codec);
2743 av_freep(&mov->dv_fctx->streams[i]);
2744 }
2745 av_freep(&mov->dv_fctx);
2746 av_freep(&mov->dv_demux);
2747 }
2748
2749 av_freep(&mov->trex_data);
2750
2751 return 0;
2752 }
2753
2754 static int mov_read_header(AVFormatContext *s)
2755 {
2756 MOVContext *mov = s->priv_data;
2757 AVIOContext *pb = s->pb;
2758 int err;
2759 MOVAtom atom = { AV_RL32("root") };
2760
2761 mov->fc = s;
2762 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2763 if (pb->seekable)
2764 atom.size = avio_size(pb);
2765 else
2766 atom.size = INT64_MAX;
2767
2768 /* check MOV header */
2769 if ((err = mov_read_default(mov, pb, atom)) < 0) {
2770 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2771 mov_read_close(s);
2772 return err;
2773 }
2774 if (!mov->found_moov) {
2775 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2776 mov_read_close(s);
2777 return AVERROR_INVALIDDATA;
2778 }
2779 av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
2780
2781 if (pb->seekable && mov->chapter_track > 0)
2782 mov_read_chapters(s);
2783
2784 if (mov->trex_data) {
2785 int i;
2786 for (i = 0; i < s->nb_streams; i++) {
2787 AVStream *st = s->streams[i];
2788 MOVStreamContext *sc = st->priv_data;
2789 if (st->duration)
2790 st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
2791 }
2792 }
2793
2794 return 0;
2795 }
2796
2797 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2798 {
2799 AVIndexEntry *sample = NULL;
2800 int64_t best_dts = INT64_MAX;
2801 int i;
2802 for (i = 0; i < s->nb_streams; i++) {
2803 AVStream *avst = s->streams[i];
2804 MOVStreamContext *msc = avst->priv_data;
2805 if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2806 AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2807 int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2808 av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2809 if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
2810 (s->pb->seekable &&
2811 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2812 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2813 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2814 sample = current_sample;
2815 best_dts = dts;
2816 *st = avst;
2817 }
2818 }
2819 }
2820 return sample;
2821 }
2822
2823 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2824 {
2825 MOVContext *mov = s->priv_data;
2826 MOVStreamContext *sc;
2827 AVIndexEntry *sample;
2828 AVStream *st = NULL;
2829 int ret;
2830 retry:
2831 sample = mov_find_next_sample(s, &st);
2832 if (!sample) {
2833 mov->found_mdat = 0;
2834 if (!mov->next_root_atom)
2835 return AVERROR_EOF;
2836 avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
2837 mov->next_root_atom = 0;
2838 if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
2839 s->pb->eof_reached)
2840 return AVERROR_EOF;
2841 av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
2842 goto retry;
2843 }
2844 sc = st->priv_data;
2845 /* must be done just before reading, to avoid infinite loop on sample */
2846 sc->current_sample++;
2847
2848 if (st->discard != AVDISCARD_ALL) {
2849 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2850 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2851 sc->ffindex, sample->pos);
2852 return AVERROR_INVALIDDATA;
2853 }
2854 ret = av_get_packet(sc->pb, pkt, sample->size);
2855 if (ret < 0)
2856 return ret;
2857 if (sc->has_palette) {
2858 uint8_t *pal;
2859
2860 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2861 if (!pal) {
2862 av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
2863 } else {
2864 memcpy(pal, sc->palette, AVPALETTE_SIZE);
2865 sc->has_palette = 0;
2866 }
2867 }
2868 #if CONFIG_DV_DEMUXER
2869 if (mov->dv_demux && sc->dv_audio_container) {
2870 avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2871 av_free(pkt->data);
2872 pkt->size = 0;
2873 ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
2874 if (ret < 0)
2875 return ret;
2876 }
2877 #endif
2878 }
2879
2880 pkt->stream_index = sc->ffindex;
2881 pkt->dts = sample->timestamp;
2882 if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
2883 pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2884 /* update ctts context */
2885 sc->ctts_sample++;
2886 if (sc->ctts_index < sc->ctts_count &&
2887 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2888 sc->ctts_index++;
2889 sc->ctts_sample = 0;
2890 }
2891 if (sc->wrong_dts)
2892 pkt->dts = AV_NOPTS_VALUE;
2893 } else {
2894 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2895 st->index_entries[sc->current_sample].timestamp : st->duration;
2896 pkt->duration = next_dts - pkt->dts;
2897 pkt->pts = pkt->dts;
2898 }
2899 if (st->discard == AVDISCARD_ALL)
2900 goto retry;
2901 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2902 pkt->pos = sample->pos;
2903 av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2904 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2905 return 0;
2906 }
2907
2908 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2909 {
2910 MOVStreamContext *sc = st->priv_data;
2911 int sample, time_sample;
2912 int i;
2913
2914 sample = av_index_search_timestamp(st, timestamp, flags);
2915 av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2916 if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
2917 sample = 0;
2918 if (sample < 0) /* not sure what to do */
2919 return AVERROR_INVALIDDATA;
2920 sc->current_sample = sample;
2921 av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2922 /* adjust ctts index */
2923 if (sc->ctts_data) {
2924 time_sample = 0;
2925 for (i = 0; i < sc->ctts_count; i++) {
2926 int next = time_sample + sc->ctts_data[i].count;
2927 if (next > sc->current_sample) {
2928 sc->ctts_index = i;
2929 sc->ctts_sample = sc->current_sample - time_sample;
2930 break;
2931 }
2932 time_sample = next;
2933 }
2934 }
2935 return sample;
2936 }
2937
2938 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2939 {
2940 AVStream *st;
2941 int64_t seek_timestamp, timestamp;
2942 int sample;
2943 int i;
2944
2945 if (stream_index >= s->nb_streams)
2946 return AVERROR_INVALIDDATA;
2947 if (sample_time < 0)
2948 sample_time = 0;
2949
2950 st = s->streams[stream_index];
2951 sample = mov_seek_stream(s, st, sample_time, flags);
2952 if (sample < 0)
2953 return sample;
2954
2955 /* adjust seek timestamp to found sample timestamp */
2956 seek_timestamp = st->index_entries[sample].timestamp;
2957
2958 for (i = 0; i < s->nb_streams; i++) {
2959 st = s->streams[i];
2960 if (stream_index == i)
2961 continue;
2962
2963 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2964 mov_seek_stream(s, st, timestamp, flags);
2965 }
2966 return 0;
2967 }
2968
2969 AVInputFormat ff_mov_demuxer = {
2970 .name = "mov,mp4,m4a,3gp,3g2,mj2",
2971 .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
2972 .priv_data_size = sizeof(MOVContext),
2973 .read_probe = mov_probe,
2974 .read_header = mov_read_header,
2975 .read_packet = mov_read_packet,
2976 .read_close = mov_read_close,
2977 .read_seek = mov_read_seek,
2978 };