mov: Correctly allocate ctts_data
[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 <inttypes.h>
27 #include <limits.h>
28 #include <stdint.h>
29
30 #include "libavutil/attributes.h"
31 #include "libavutil/channel_layout.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/intfloat.h"
34 #include "libavutil/mathematics.h"
35 #include "libavutil/time_internal.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/opt.h"
39 #include "libavcodec/ac3tab.h"
40 #include "avformat.h"
41 #include "internal.h"
42 #include "avio_internal.h"
43 #include "riff.h"
44 #include "isom.h"
45 #include "libavcodec/get_bits.h"
46 #include "id3v1.h"
47 #include "mov_chan.h"
48 #include "replaygain.h"
49
50 #if CONFIG_ZLIB
51 #include <zlib.h>
52 #endif
53
54 #include "qtpalette.h"
55
56
57 #undef NDEBUG
58 #include <assert.h>
59
60 /* those functions parse an atom */
61 /* links atom IDs to parse functions */
62 typedef struct MOVParseTableEntry {
63 uint32_t type;
64 int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
65 } MOVParseTableEntry;
66
67 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
68
69 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
70 unsigned len, const char *key)
71 {
72 char buf[16];
73
74 short current, total = 0;
75 avio_rb16(pb); // unknown
76 current = avio_rb16(pb);
77 if (len >= 6)
78 total = avio_rb16(pb);
79 if (!total)
80 snprintf(buf, sizeof(buf), "%d", current);
81 else
82 snprintf(buf, sizeof(buf), "%d/%d", current, total);
83 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
84 av_dict_set(&c->fc->metadata, key, buf, 0);
85
86 return 0;
87 }
88
89 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
90 unsigned len, const char *key)
91 {
92 char buf[16];
93
94 /* bypass padding bytes */
95 avio_r8(pb);
96 avio_r8(pb);
97 avio_r8(pb);
98
99 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
100 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
101 av_dict_set(&c->fc->metadata, key, buf, 0);
102
103 return 0;
104 }
105
106 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
107 unsigned len, const char *key)
108 {
109 char buf[16];
110
111 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
112 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
113 av_dict_set(&c->fc->metadata, key, buf, 0);
114
115 return 0;
116 }
117
118 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
119 unsigned len, const char *key)
120 {
121 short genre;
122 char buf[20];
123
124 avio_r8(pb); // unknown
125
126 genre = avio_r8(pb);
127 if (genre < 1 || genre > ID3v1_GENRE_MAX)
128 return 0;
129 snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
130 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
131 av_dict_set(&c->fc->metadata, key, buf, 0);
132
133 return 0;
134 }
135
136 static const uint32_t mac_to_unicode[128] = {
137 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
138 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
139 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
140 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
141 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
142 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
143 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
144 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
145 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
146 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
147 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
148 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
149 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
150 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
151 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
152 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
153 };
154
155 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
156 char *dst, int dstlen)
157 {
158 char *p = dst;
159 char *end = dst+dstlen-1;
160 int i;
161
162 for (i = 0; i < len; i++) {
163 uint8_t t, c = avio_r8(pb);
164 if (c < 0x80 && p < end)
165 *p++ = c;
166 else
167 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
168 }
169 *p = 0;
170 return p - dst;
171 }
172
173 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
174 {
175 AVPacket pkt;
176 AVStream *st;
177 MOVStreamContext *sc;
178 enum AVCodecID id;
179 int ret;
180
181 switch (type) {
182 case 0xd: id = AV_CODEC_ID_MJPEG; break;
183 case 0xe: id = AV_CODEC_ID_PNG; break;
184 case 0x1b: id = AV_CODEC_ID_BMP; break;
185 default:
186 av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
187 avio_skip(pb, len);
188 return 0;
189 }
190
191 st = avformat_new_stream(c->fc, NULL);
192 if (!st)
193 return AVERROR(ENOMEM);
194 sc = av_mallocz(sizeof(*sc));
195 if (!sc)
196 return AVERROR(ENOMEM);
197 st->priv_data = sc;
198
199 ret = av_get_packet(pb, &pkt, len);
200 if (ret < 0)
201 return ret;
202
203 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
204
205 st->attached_pic = pkt;
206 st->attached_pic.stream_index = st->index;
207 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
208
209 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
210 st->codec->codec_id = id;
211
212 return 0;
213 }
214
215 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
216 {
217 char language[4] = { 0 };
218 char buf[100];
219 uint16_t langcode = 0;
220 double longitude, latitude;
221 const char *key = "location";
222
223 if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4)
224 return AVERROR_INVALIDDATA;
225
226 avio_skip(pb, 4); // version+flags
227 langcode = avio_rb16(pb);
228 ff_mov_lang_to_iso639(langcode, language);
229 len -= 6;
230
231 len -= avio_get_str(pb, len, buf, sizeof(buf)); // place name
232 if (len < 1)
233 return AVERROR_INVALIDDATA;
234 avio_skip(pb, 1); // role
235 len -= 1;
236
237 if (len < 14)
238 return AVERROR_INVALIDDATA;
239 longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
240 latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
241
242 // Try to output in the same format as the ?xyz field
243 snprintf(buf, sizeof(buf), "%+08.4f%+09.4f/", latitude, longitude);
244 if (*language && strcmp(language, "und")) {
245 char key2[16];
246 snprintf(key2, sizeof(key2), "%s-%s", key, language);
247 av_dict_set(&c->fc->metadata, key2, buf, 0);
248 }
249 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
250 return av_dict_set(&c->fc->metadata, key, buf, 0);
251 }
252
253 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
254 {
255 char tmp_key[5];
256 char *str, key2[32], language[4] = {0};
257 const char *key = NULL;
258 uint16_t langcode = 0;
259 uint32_t data_type = 0, str_size, str_size_alloc;
260 int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
261 int raw = 0;
262
263 switch (atom.type) {
264 case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
265 case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
266 case MKTAG( 'X','M','P','_'):
267 if (c->export_xmp) { key = "xmp"; raw = 1; } break;
268 case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
269 case MKTAG( 'a','k','I','D'): key = "account_type";
270 parse = mov_metadata_int8_no_padding; break;
271 case MKTAG( 'a','p','I','D'): key = "account_id"; break;
272 case MKTAG( 'c','a','t','g'): key = "category"; break;
273 case MKTAG( 'c','p','i','l'): key = "compilation";
274 parse = mov_metadata_int8_no_padding; break;
275 case MKTAG( 'c','p','r','t'): key = "copyright"; break;
276 case MKTAG( 'd','e','s','c'): key = "description"; break;
277 case MKTAG( 'd','i','s','k'): key = "disc";
278 parse = mov_metadata_track_or_disc_number; break;
279 case MKTAG( 'e','g','i','d'): key = "episode_uid";
280 parse = mov_metadata_int8_no_padding; break;
281 case MKTAG( 'g','n','r','e'): key = "genre";
282 parse = mov_metadata_gnre; break;
283 case MKTAG( 'h','d','v','d'): key = "hd_video";
284 parse = mov_metadata_int8_no_padding; break;
285 case MKTAG( 'k','e','y','w'): key = "keywords"; break;
286 case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
287 case MKTAG( 'l','o','c','i'):
288 return mov_metadata_loci(c, pb, atom.size);
289 case MKTAG( 'p','c','s','t'): key = "podcast";
290 parse = mov_metadata_int8_no_padding; break;
291 case MKTAG( 'p','g','a','p'): key = "gapless_playback";
292 parse = mov_metadata_int8_no_padding; break;
293 case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
294 case MKTAG( 'r','t','n','g'): key = "rating";
295 parse = mov_metadata_int8_no_padding; break;
296 case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
297 case MKTAG( 's','o','a','l'): key = "sort_album"; break;
298 case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
299 case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
300 case MKTAG( 's','o','n','m'): key = "sort_name"; break;
301 case MKTAG( 's','o','s','n'): key = "sort_show"; break;
302 case MKTAG( 's','t','i','k'): key = "media_type";
303 parse = mov_metadata_int8_no_padding; break;
304 case MKTAG( 't','r','k','n'): key = "track";
305 parse = mov_metadata_track_or_disc_number; break;
306 case MKTAG( 't','v','e','n'): key = "episode_id"; break;
307 case MKTAG( 't','v','e','s'): key = "episode_sort";
308 parse = mov_metadata_int8_bypass_padding; break;
309 case MKTAG( 't','v','n','n'): key = "network"; break;
310 case MKTAG( 't','v','s','h'): key = "show"; break;
311 case MKTAG( 't','v','s','n'): key = "season_number";
312 parse = mov_metadata_int8_bypass_padding; break;
313 case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
314 case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
315 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
316 case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
317 case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
318 case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
319 case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
320 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
321 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
322 case MKTAG(0xa9,'d','i','r'): key = "director"; break;
323 case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
324 case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
325 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
326 case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
327 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
328 case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
329 case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
330 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
331 case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
332 case MKTAG(0xa9,'m','a','k'): key = "make"; break;
333 case MKTAG(0xa9,'m','o','d'): key = "model"; break;
334 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
335 case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
336 case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
337 case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
338 case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
339 case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
340 case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
341 case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
342 case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
343 case MKTAG(0xa9,'t','r','k'): key = "track"; break;
344 case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
345 case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
346 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
347 case MKTAG(0xa9,'x','y','z'): key = "location"; break;
348 }
349
350 if (c->itunes_metadata && atom.size > 8) {
351 int data_size = avio_rb32(pb);
352 int tag = avio_rl32(pb);
353 if (tag == MKTAG('d','a','t','a')) {
354 data_type = avio_rb32(pb); // type
355 avio_rb32(pb); // unknown
356 str_size = data_size - 16;
357 atom.size -= 16;
358
359 if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
360 int ret = mov_read_covr(c, pb, data_type, str_size);
361 if (ret < 0) {
362 av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
363 return ret;
364 }
365 }
366 } else return 0;
367 } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
368 str_size = avio_rb16(pb); // string length
369 langcode = avio_rb16(pb);
370 ff_mov_lang_to_iso639(langcode, language);
371 atom.size -= 4;
372 } else
373 str_size = atom.size;
374
375 if (c->export_all && !key) {
376 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
377 key = tmp_key;
378 }
379
380 if (!key)
381 return 0;
382 if (atom.size < 0)
383 return AVERROR_INVALIDDATA;
384
385 // allocate twice as much as worst-case
386 str_size_alloc = (raw ? str_size : str_size * 2) + 1;
387 str = av_malloc(str_size_alloc);
388 if (!str)
389 return AVERROR(ENOMEM);
390
391 if (parse)
392 parse(c, pb, str_size, key);
393 else {
394 if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
395 mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
396 } else {
397 avio_read(pb, str, str_size);
398 str[str_size] = 0;
399 }
400 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
401 av_dict_set(&c->fc->metadata, key, str, 0);
402 if (*language && strcmp(language, "und")) {
403 snprintf(key2, sizeof(key2), "%s-%s", key, language);
404 av_dict_set(&c->fc->metadata, key2, str, 0);
405 }
406 }
407 av_log(c->fc, AV_LOG_TRACE, "lang \"%3s\" ", language);
408 av_log(c->fc, AV_LOG_TRACE, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
409 key, str, (char*)&atom.type, str_size_alloc, atom.size);
410
411 av_freep(&str);
412 return 0;
413 }
414
415 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
416 {
417 int64_t start;
418 int i, nb_chapters, str_len, version;
419 char str[256+1];
420
421 if ((atom.size -= 5) < 0)
422 return 0;
423
424 version = avio_r8(pb);
425 avio_rb24(pb);
426 if (version)
427 avio_rb32(pb); // ???
428 nb_chapters = avio_r8(pb);
429
430 for (i = 0; i < nb_chapters; i++) {
431 if (atom.size < 9)
432 return 0;
433
434 start = avio_rb64(pb);
435 str_len = avio_r8(pb);
436
437 if ((atom.size -= 9+str_len) < 0)
438 return 0;
439
440 avio_read(pb, str, str_len);
441 str[str_len] = 0;
442 avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
443 }
444 return 0;
445 }
446
447 #define MIN_DATA_ENTRY_BOX_SIZE 12
448 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
449 {
450 AVStream *st;
451 MOVStreamContext *sc;
452 int entries, i, j;
453
454 if (c->fc->nb_streams < 1)
455 return 0;
456 st = c->fc->streams[c->fc->nb_streams-1];
457 sc = st->priv_data;
458
459 avio_rb32(pb); // version + flags
460 entries = avio_rb32(pb);
461 if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
462 entries >= UINT_MAX / sizeof(*sc->drefs))
463 return AVERROR_INVALIDDATA;
464 av_free(sc->drefs);
465 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
466 if (!sc->drefs)
467 return AVERROR(ENOMEM);
468 sc->drefs_count = entries;
469
470 for (i = 0; i < sc->drefs_count; i++) {
471 MOVDref *dref = &sc->drefs[i];
472 uint32_t size = avio_rb32(pb);
473 int64_t next = avio_tell(pb) + size - 4;
474
475 if (size < 12)
476 return AVERROR_INVALIDDATA;
477
478 dref->type = avio_rl32(pb);
479 avio_rb32(pb); // version + flags
480 av_log(c->fc, AV_LOG_TRACE, "type %.4s size %d\n", (char*)&dref->type, size);
481
482 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
483 /* macintosh alias record */
484 uint16_t volume_len, len;
485 int16_t type;
486
487 avio_skip(pb, 10);
488
489 volume_len = avio_r8(pb);
490 volume_len = FFMIN(volume_len, 27);
491 avio_read(pb, dref->volume, 27);
492 dref->volume[volume_len] = 0;
493 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
494
495 avio_skip(pb, 12);
496
497 len = avio_r8(pb);
498 len = FFMIN(len, 63);
499 avio_read(pb, dref->filename, 63);
500 dref->filename[len] = 0;
501 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
502
503 avio_skip(pb, 16);
504
505 /* read next level up_from_alias/down_to_target */
506 dref->nlvl_from = avio_rb16(pb);
507 dref->nlvl_to = avio_rb16(pb);
508 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
509 dref->nlvl_from, dref->nlvl_to);
510
511 avio_skip(pb, 16);
512
513 for (type = 0; type != -1 && avio_tell(pb) < next; ) {
514 if (pb->eof_reached)
515 return AVERROR_EOF;
516 type = avio_rb16(pb);
517 len = avio_rb16(pb);
518 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
519 if (len&1)
520 len += 1;
521 if (type == 2 || type == 18) { // absolute path
522 av_free(dref->path);
523 dref->path = av_mallocz(len+1);
524 if (!dref->path)
525 return AVERROR(ENOMEM);
526 avio_read(pb, dref->path, len);
527 if (type == 18) // no additional processing needed
528 continue;
529 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
530 len -= volume_len;
531 memmove(dref->path, dref->path+volume_len, len);
532 dref->path[len] = 0;
533 }
534 for (j = 0; j < len; j++)
535 if (dref->path[j] == ':')
536 dref->path[j] = '/';
537 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
538 } else if (type == 0) { // directory name
539 av_free(dref->dir);
540 dref->dir = av_malloc(len+1);
541 if (!dref->dir)
542 return AVERROR(ENOMEM);
543 avio_read(pb, dref->dir, len);
544 dref->dir[len] = 0;
545 for (j = 0; j < len; j++)
546 if (dref->dir[j] == ':')
547 dref->dir[j] = '/';
548 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
549 } else
550 avio_skip(pb, len);
551 }
552 }
553 avio_seek(pb, next, SEEK_SET);
554 }
555 return 0;
556 }
557
558 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
559 {
560 AVStream *st;
561 uint32_t type;
562 uint32_t av_unused ctype;
563 int64_t title_size;
564 char *title_str;
565
566 if (c->fc->nb_streams < 1) // meta before first trak
567 return 0;
568
569 st = c->fc->streams[c->fc->nb_streams-1];
570
571 avio_r8(pb); /* version */
572 avio_rb24(pb); /* flags */
573
574 /* component type */
575 ctype = avio_rl32(pb);
576 type = avio_rl32(pb); /* component subtype */
577
578 av_log(c->fc, AV_LOG_TRACE, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
579 av_log(c->fc, AV_LOG_TRACE, "stype= %.4s\n", (char*)&type);
580
581 if (type == MKTAG('v','i','d','e'))
582 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
583 else if (type == MKTAG('s','o','u','n'))
584 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
585 else if (type == MKTAG('m','1','a',' '))
586 st->codec->codec_id = AV_CODEC_ID_MP2;
587 else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
588 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
589
590 avio_rb32(pb); /* component manufacture */
591 avio_rb32(pb); /* component flags */
592 avio_rb32(pb); /* component flags mask */
593
594 title_size = atom.size - 24;
595 if (title_size > 0) {
596 title_str = av_malloc(title_size + 1); /* Add null terminator */
597 if (!title_str)
598 return AVERROR(ENOMEM);
599 avio_read(pb, title_str, title_size);
600 title_str[title_size] = 0;
601 if (title_str[0]) {
602 int off = (!c->isom && title_str[0] == title_size - 1);
603 av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
604 }
605 av_freep(&title_str);
606 }
607
608 return 0;
609 }
610
611 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
612 {
613 AVStream *st;
614 int tag;
615
616 if (fc->nb_streams < 1)
617 return 0;
618 st = fc->streams[fc->nb_streams-1];
619
620 avio_rb32(pb); /* version + flags */
621 ff_mp4_read_descr(fc, pb, &tag);
622 if (tag == MP4ESDescrTag) {
623 ff_mp4_parse_es_descr(pb, NULL);
624 } else
625 avio_rb16(pb); /* ID */
626
627 ff_mp4_read_descr(fc, pb, &tag);
628 if (tag == MP4DecConfigDescrTag)
629 ff_mp4_read_dec_config_descr(fc, st, pb);
630 return 0;
631 }
632
633 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
634 {
635 return ff_mov_read_esds(c->fc, pb);
636 }
637
638 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
639 {
640 AVStream *st;
641 enum AVAudioServiceType *ast;
642 int ac3info, acmod, lfeon, bsmod;
643
644 if (c->fc->nb_streams < 1)
645 return 0;
646 st = c->fc->streams[c->fc->nb_streams-1];
647
648 ast = (enum AVAudioServiceType*)ff_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
649 sizeof(*ast));
650 if (!ast)
651 return AVERROR(ENOMEM);
652
653 ac3info = avio_rb24(pb);
654 bsmod = (ac3info >> 14) & 0x7;
655 acmod = (ac3info >> 11) & 0x7;
656 lfeon = (ac3info >> 10) & 0x1;
657 st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
658 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
659 if (lfeon)
660 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
661 *ast = bsmod;
662 if (st->codec->channels > 1 && bsmod == 0x7)
663 *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
664
665 st->codec->audio_service_type = *ast;
666
667 return 0;
668 }
669
670 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
671 {
672 AVStream *st;
673 enum AVAudioServiceType *ast;
674 int eac3info, acmod, lfeon, bsmod;
675
676 if (c->fc->nb_streams < 1)
677 return 0;
678 st = c->fc->streams[c->fc->nb_streams-1];
679
680 ast = (enum AVAudioServiceType*)ff_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
681 sizeof(*ast));
682 if (!ast)
683 return AVERROR(ENOMEM);
684
685 /* No need to parse fields for additional independent substreams and its
686 * associated dependent substreams since libavcodec's E-AC-3 decoder
687 * does not support them yet. */
688 avio_rb16(pb); /* data_rate and num_ind_sub */
689 eac3info = avio_rb24(pb);
690 bsmod = (eac3info >> 12) & 0x1f;
691 acmod = (eac3info >> 9) & 0x7;
692 lfeon = (eac3info >> 8) & 0x1;
693 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
694 if (lfeon)
695 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
696 st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
697 *ast = bsmod;
698 if (st->codec->channels > 1 && bsmod == 0x7)
699 *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
700
701 st->codec->audio_service_type = *ast;
702
703 return 0;
704 }
705
706 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
707 {
708 AVStream *st;
709
710 if (c->fc->nb_streams < 1)
711 return 0;
712 st = c->fc->streams[c->fc->nb_streams-1];
713
714 if (atom.size < 16)
715 return 0;
716
717 /* skip version and flags */
718 avio_skip(pb, 4);
719
720 ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
721
722 return 0;
723 }
724
725 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
726 {
727 AVStream *st;
728
729 if (c->fc->nb_streams < 1)
730 return 0;
731 st = c->fc->streams[c->fc->nb_streams-1];
732
733 return ff_get_wav_header(pb, st->codec, atom.size);
734 }
735
736 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
737 {
738 const int num = avio_rb32(pb);
739 const int den = avio_rb32(pb);
740 AVStream *st;
741
742 if (c->fc->nb_streams < 1)
743 return 0;
744 st = c->fc->streams[c->fc->nb_streams-1];
745
746 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
747 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
748 av_log(c->fc, AV_LOG_WARNING,
749 "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
750 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
751 num, den);
752 } else if (den != 0) {
753 st->sample_aspect_ratio.num = num;
754 st->sample_aspect_ratio.den = den;
755 }
756 return 0;
757 }
758
759 /* this atom contains actual media data */
760 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
761 {
762 if (atom.size == 0) /* wrong one (MP4) */
763 return 0;
764 c->found_mdat=1;
765 return 0; /* now go for moov */
766 }
767
768 /* read major brand, minor version and compatible brands and store them as metadata */
769 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
770 {
771 uint32_t minor_ver;
772 int comp_brand_size;
773 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
774 char* comp_brands_str;
775 uint8_t type[5] = {0};
776
777 avio_read(pb, type, 4);
778 if (strcmp(type, "qt "))
779 c->isom = 1;
780 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
781 av_dict_set(&c->fc->metadata, "major_brand", type, 0);
782 minor_ver = avio_rb32(pb); /* minor version */
783 snprintf(minor_ver_str, sizeof(minor_ver_str), "%"PRIu32"", minor_ver);
784 av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
785
786 comp_brand_size = atom.size - 8;
787 if (comp_brand_size < 0)
788 return AVERROR_INVALIDDATA;
789 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
790 if (!comp_brands_str)
791 return AVERROR(ENOMEM);
792 avio_read(pb, comp_brands_str, comp_brand_size);
793 comp_brands_str[comp_brand_size] = 0;
794 av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
795 av_freep(&comp_brands_str);
796
797 return 0;
798 }
799
800 /* this atom should contain all header atoms */
801 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
802 {
803 int ret;
804
805 if ((ret = mov_read_default(c, pb, atom)) < 0)
806 return ret;
807 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
808 /* so we don't parse the whole file if over a network */
809 c->found_moov=1;
810 return 0; /* now go for mdat */
811 }
812
813 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
814 {
815 c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
816 av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
817 return mov_read_default(c, pb, atom);
818 }
819
820 static void mov_metadata_creation_time(AVDictionary **metadata, time_t time)
821 {
822 char buffer[32];
823 if (time) {
824 struct tm *ptm, tmbuf;
825 time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
826 ptm = gmtime_r(&time, &tmbuf);
827 if (!ptm) return;
828 if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
829 av_dict_set(metadata, "creation_time", buffer, 0);
830 }
831 }
832
833 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
834 {
835 AVStream *st;
836 MOVStreamContext *sc;
837 int version;
838 char language[4] = {0};
839 unsigned lang;
840 time_t creation_time;
841
842 if (c->fc->nb_streams < 1)
843 return 0;
844 st = c->fc->streams[c->fc->nb_streams-1];
845 sc = st->priv_data;
846
847 if (sc->time_scale) {
848 av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
849 return AVERROR_INVALIDDATA;
850 }
851
852 version = avio_r8(pb);
853 if (version > 1) {
854 avpriv_request_sample(c->fc, "Version %d", version);
855 return AVERROR_PATCHWELCOME;
856 }
857 avio_rb24(pb); /* flags */
858 if (version == 1) {
859 creation_time = avio_rb64(pb);
860 avio_rb64(pb);
861 } else {
862 creation_time = avio_rb32(pb);
863 avio_rb32(pb); /* modification time */
864 }
865 mov_metadata_creation_time(&st->metadata, creation_time);
866
867 sc->time_scale = avio_rb32(pb);
868 st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
869
870 lang = avio_rb16(pb); /* language */
871 if (ff_mov_lang_to_iso639(lang, language))
872 av_dict_set(&st->metadata, "language", language, 0);
873 avio_rb16(pb); /* quality */
874
875 return 0;
876 }
877
878 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
879 {
880 time_t creation_time;
881 int version = avio_r8(pb); /* version */
882 avio_rb24(pb); /* flags */
883
884 if (version == 1) {
885 creation_time = avio_rb64(pb);
886 avio_rb64(pb);
887 } else {
888 creation_time = avio_rb32(pb);
889 avio_rb32(pb); /* modification time */
890 }
891 mov_metadata_creation_time(&c->fc->metadata, creation_time);
892 c->time_scale = avio_rb32(pb); /* time scale */
893
894 av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
895
896 c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
897 avio_rb32(pb); /* preferred scale */
898
899 avio_rb16(pb); /* preferred volume */
900
901 avio_skip(pb, 10); /* reserved */
902
903 avio_skip(pb, 36); /* display matrix */
904
905 avio_rb32(pb); /* preview time */
906 avio_rb32(pb); /* preview duration */
907 avio_rb32(pb); /* poster time */
908 avio_rb32(pb); /* selection time */
909 avio_rb32(pb); /* selection duration */
910 avio_rb32(pb); /* current time */
911 avio_rb32(pb); /* next track ID */
912
913 return 0;
914 }
915
916 static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom)
917 {
918 AVStream *st;
919
920 if (c->fc->nb_streams < 1)
921 return 0;
922 st = c->fc->streams[c->fc->nb_streams-1];
923
924 if ((uint64_t)atom.size > (1<<30))
925 return AVERROR_INVALIDDATA;
926
927 // currently SVQ3 decoder expect full STSD header - so let's fake it
928 // this should be fixed and just SMI header should be passed
929 av_free(st->codec->extradata);
930 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
931 if (!st->codec->extradata)
932 return AVERROR(ENOMEM);
933 st->codec->extradata_size = 0x5a + atom.size;
934 memcpy(st->codec->extradata, "SVQ3", 4); // fake
935 avio_read(pb, st->codec->extradata + 0x5a, atom.size);
936 av_log(c->fc, AV_LOG_TRACE, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
937 return 0;
938 }
939
940 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
941 {
942 AVStream *st;
943 int little_endian;
944
945 if (c->fc->nb_streams < 1)
946 return 0;
947 st = c->fc->streams[c->fc->nb_streams-1];
948
949 little_endian = !!avio_rb16(pb);
950 av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
951 if (little_endian == 1) {
952 switch (st->codec->codec_id) {
953 case AV_CODEC_ID_PCM_S24BE:
954 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
955 break;
956 case AV_CODEC_ID_PCM_S32BE:
957 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
958 break;
959 case AV_CODEC_ID_PCM_F32BE:
960 st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
961 break;
962 case AV_CODEC_ID_PCM_F64BE:
963 st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
964 break;
965 default:
966 break;
967 }
968 }
969 return 0;
970 }
971
972 static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
973 {
974 AVStream *st;
975 char color_parameter_type[5] = { 0 };
976 int color_primaries, color_trc, color_matrix;
977
978 if (c->fc->nb_streams < 1)
979 return 0;
980 st = c->fc->streams[c->fc->nb_streams - 1];
981
982 avio_read(pb, color_parameter_type, 4);
983 if (strncmp(color_parameter_type, "nclx", 4) &&
984 strncmp(color_parameter_type, "nclc", 4)) {
985 av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
986 color_parameter_type);
987 return 0;
988 }
989
990 color_primaries = avio_rb16(pb);
991 color_trc = avio_rb16(pb);
992 color_matrix = avio_rb16(pb);
993
994 av_log(c->fc, AV_LOG_TRACE,
995 "%s: pri %"PRIu16" trc %"PRIu16" matrix %"PRIu16"",
996 color_parameter_type, color_primaries, color_trc, color_matrix);
997
998 if (!strncmp(color_parameter_type, "nclx", 4)) {
999 uint8_t color_range = avio_r8(pb) >> 7;
1000 av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1001 if (color_range)
1002 st->codec->color_range = AVCOL_RANGE_JPEG;
1003 else
1004 st->codec->color_range = AVCOL_RANGE_MPEG;
1005 /* 14496-12 references JPEG XR specs (rather than the more complete
1006 * 23001-8) so some adjusting is required */
1007 if (color_primaries >= AVCOL_PRI_FILM)
1008 color_primaries = AVCOL_PRI_UNSPECIFIED;
1009 if ((color_trc >= AVCOL_TRC_LINEAR &&
1010 color_trc <= AVCOL_TRC_LOG_SQRT) ||
1011 color_trc >= AVCOL_TRC_BT2020_10)
1012 color_trc = AVCOL_TRC_UNSPECIFIED;
1013 if (color_matrix >= AVCOL_SPC_BT2020_NCL)
1014 color_matrix = AVCOL_SPC_UNSPECIFIED;
1015 st->codec->color_primaries = color_primaries;
1016 st->codec->color_trc = color_trc;
1017 st->codec->colorspace = color_matrix;
1018 } else if (!strncmp(color_parameter_type, "nclc", 4)) {
1019 /* color primaries, Table 4-4 */
1020 switch (color_primaries) {
1021 case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
1022 case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
1023 case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
1024 }
1025 /* color transfer, Table 4-5 */
1026 switch (color_trc) {
1027 case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
1028 case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
1029 }
1030 /* color matrix, Table 4-6 */
1031 switch (color_matrix) {
1032 case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
1033 case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
1034 case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
1035 }
1036 }
1037 av_log(c->fc, AV_LOG_TRACE, "\n");
1038
1039 return 0;
1040 }
1041
1042 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1043 {
1044 AVStream *st;
1045 unsigned mov_field_order;
1046 enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1047
1048 if (c->fc->nb_streams < 1) // will happen with jp2 files
1049 return 0;
1050 st = c->fc->streams[c->fc->nb_streams-1];
1051 if (atom.size < 2)
1052 return AVERROR_INVALIDDATA;
1053 mov_field_order = avio_rb16(pb);
1054 if ((mov_field_order & 0xFF00) == 0x0100)
1055 decoded_field_order = AV_FIELD_PROGRESSIVE;
1056 else if ((mov_field_order & 0xFF00) == 0x0200) {
1057 switch (mov_field_order & 0xFF) {
1058 case 0x01: decoded_field_order = AV_FIELD_TT;
1059 break;
1060 case 0x06: decoded_field_order = AV_FIELD_BB;
1061 break;
1062 case 0x09: decoded_field_order = AV_FIELD_TB;
1063 break;
1064 case 0x0E: decoded_field_order = AV_FIELD_BT;
1065 break;
1066 }
1067 }
1068 if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1069 av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1070 }
1071 st->codec->field_order = decoded_field_order;
1072
1073 return 0;
1074 }
1075
1076 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1077 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1078 {
1079 AVStream *st;
1080 uint64_t size;
1081 uint8_t *buf;
1082 int err;
1083
1084 if (c->fc->nb_streams < 1) // will happen with jp2 files
1085 return 0;
1086 st= c->fc->streams[c->fc->nb_streams-1];
1087 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
1088 if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1089 return AVERROR_INVALIDDATA;
1090 if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
1091 st->codec->extradata_size = 0;
1092 return err;
1093 }
1094 buf = st->codec->extradata + st->codec->extradata_size;
1095 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
1096 AV_WB32( buf , atom.size + 8);
1097 AV_WL32( buf + 4, atom.type);
1098 avio_read(pb, buf + 8, atom.size);
1099 return 0;
1100 }
1101
1102 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1103 {
1104 AVStream *st;
1105
1106 if (c->fc->nb_streams < 1)
1107 return 0;
1108 st = c->fc->streams[c->fc->nb_streams-1];
1109
1110 if ((uint64_t)atom.size > (1<<30))
1111 return AVERROR_INVALIDDATA;
1112
1113 if (st->codec->codec_id == AV_CODEC_ID_QDM2 || st->codec->codec_id == AV_CODEC_ID_QDMC) {
1114 // pass all frma atom to codec, needed at least for QDMC and QDM2
1115 av_free(st->codec->extradata);
1116 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
1117 if (!st->codec->extradata)
1118 return AVERROR(ENOMEM);
1119 st->codec->extradata_size = atom.size;
1120 avio_read(pb, st->codec->extradata, atom.size);
1121 } else if (atom.size > 8) { /* to read frma, esds atoms */
1122 int ret;
1123 if ((ret = mov_read_default(c, pb, atom)) < 0)
1124 return ret;
1125 } else
1126 avio_skip(pb, atom.size);
1127 return 0;
1128 }
1129
1130 /**
1131 * This function reads atom content and puts data in extradata without tag
1132 * nor size unlike mov_read_extradata.
1133 */
1134 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1135 {
1136 AVStream *st;
1137
1138 if (c->fc->nb_streams < 1)
1139 return 0;
1140 st = c->fc->streams[c->fc->nb_streams-1];
1141
1142 if ((uint64_t)atom.size > (1<<30))
1143 return AVERROR_INVALIDDATA;
1144
1145 if (atom.size >= 10) {
1146 // Broken files created by legacy versions of libavformat will
1147 // wrap a whole fiel atom inside of a glbl atom.
1148 unsigned size = avio_rb32(pb);
1149 unsigned type = avio_rl32(pb);
1150 avio_seek(pb, -8, SEEK_CUR);
1151 if (type == MKTAG('f','i','e','l') && size == atom.size)
1152 return mov_read_default(c, pb, atom);
1153 }
1154 av_free(st->codec->extradata);
1155 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
1156 if (!st->codec->extradata)
1157 return AVERROR(ENOMEM);
1158 st->codec->extradata_size = atom.size;
1159 avio_read(pb, st->codec->extradata, atom.size);
1160 return 0;
1161 }
1162
1163 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1164 {
1165 AVStream *st;
1166 uint8_t profile_level;
1167
1168 if (c->fc->nb_streams < 1)
1169 return 0;
1170 st = c->fc->streams[c->fc->nb_streams-1];
1171
1172 if (atom.size >= (1<<28) || atom.size < 7)
1173 return AVERROR_INVALIDDATA;
1174
1175 profile_level = avio_r8(pb);
1176 if ((profile_level & 0xf0) != 0xc0)
1177 return 0;
1178
1179 av_free(st->codec->extradata);
1180 st->codec->extradata = av_mallocz(atom.size - 7 + FF_INPUT_BUFFER_PADDING_SIZE);
1181 if (!st->codec->extradata)
1182 return AVERROR(ENOMEM);
1183 st->codec->extradata_size = atom.size - 7;
1184 avio_seek(pb, 6, SEEK_CUR);
1185 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
1186 return 0;
1187 }
1188
1189 /**
1190 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1191 * but can have extradata appended at the end after the 40 bytes belonging
1192 * to the struct.
1193 */
1194 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1195 {
1196 AVStream *st;
1197
1198 if (c->fc->nb_streams < 1)
1199 return 0;
1200 if (atom.size <= 40)
1201 return 0;
1202 st = c->fc->streams[c->fc->nb_streams-1];
1203
1204 if ((uint64_t)atom.size > (1<<30))
1205 return AVERROR_INVALIDDATA;
1206
1207 av_free(st->codec->extradata);
1208 st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
1209 if (!st->codec->extradata)
1210 return AVERROR(ENOMEM);
1211 st->codec->extradata_size = atom.size - 40;
1212 avio_skip(pb, 40);
1213 avio_read(pb, st->codec->extradata, atom.size - 40);
1214 return 0;
1215 }
1216
1217 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1218 {
1219 AVStream *st;
1220 MOVStreamContext *sc;
1221 unsigned int i, entries;
1222
1223 if (c->fc->nb_streams < 1)
1224 return 0;
1225 st = c->fc->streams[c->fc->nb_streams-1];
1226 sc = st->priv_data;
1227
1228 avio_r8(pb); /* version */
1229 avio_rb24(pb); /* flags */
1230
1231 entries = avio_rb32(pb);
1232
1233 if (!entries)
1234 return 0;
1235 if (entries >= UINT_MAX/sizeof(int64_t))
1236 return AVERROR_INVALIDDATA;
1237
1238 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1239 if (!sc->chunk_offsets)
1240 return AVERROR(ENOMEM);
1241 sc->chunk_count = entries;
1242
1243 if (atom.type == MKTAG('s','t','c','o'))
1244 for (i = 0; i < entries && !pb->eof_reached; i++)
1245 sc->chunk_offsets[i] = avio_rb32(pb);
1246 else if (atom.type == MKTAG('c','o','6','4'))
1247 for (i = 0; i < entries && !pb->eof_reached; i++)
1248 sc->chunk_offsets[i] = avio_rb64(pb);
1249 else
1250 return AVERROR_INVALIDDATA;
1251
1252 sc->chunk_count = i;
1253
1254 if (pb->eof_reached)
1255 return AVERROR_EOF;
1256
1257 return 0;
1258 }
1259
1260 /**
1261 * Compute codec id for 'lpcm' tag.
1262 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1263 */
1264 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1265 {
1266 /* lpcm flags:
1267 * 0x1 = float
1268 * 0x2 = big-endian
1269 * 0x4 = signed
1270 */
1271 return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1272 }
1273
1274 static int mov_codec_id(AVStream *st, uint32_t format)
1275 {
1276 int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1277
1278 if (id <= 0 &&
1279 ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1280 (format & 0xFFFF) == 'T' + ('S' << 8)))
1281 id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1282
1283 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1284 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1285 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1286 /* skip old asf mpeg4 tag */
1287 format && format != MKTAG('m','p','4','s')) {
1288 id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1289 if (id <= 0)
1290 id = ff_codec_get_id(ff_codec_bmp_tags, format);
1291 if (id > 0)
1292 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1293 else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
1294 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1295 if (id > 0)
1296 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1297 }
1298 }
1299
1300 st->codec->codec_tag = format;
1301
1302 return id;
1303 }
1304
1305 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1306 AVStream *st, MOVStreamContext *sc)
1307 {
1308 uint8_t codec_name[32];
1309 unsigned int color_depth, len, j;
1310 int color_greyscale;
1311 int color_table_id;
1312
1313 avio_rb16(pb); /* version */
1314 avio_rb16(pb); /* revision level */
1315 avio_rb32(pb); /* vendor */
1316 avio_rb32(pb); /* temporal quality */
1317 avio_rb32(pb); /* spatial quality */
1318
1319 st->codec->width = avio_rb16(pb); /* width */
1320 st->codec->height = avio_rb16(pb); /* height */
1321
1322 avio_rb32(pb); /* horiz resolution */
1323 avio_rb32(pb); /* vert resolution */
1324 avio_rb32(pb); /* data size, always 0 */
1325 avio_rb16(pb); /* frames per samples */
1326
1327 len = avio_r8(pb); /* codec name, pascal string */
1328 if (len > 31)
1329 len = 31;
1330 mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1331 if (len < 31)
1332 avio_skip(pb, 31 - len);
1333
1334 if (codec_name[0])
1335 av_dict_set(&st->metadata, "encoder", codec_name, 0);
1336
1337 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1338 if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1339 st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1340 /* Flash Media Server uses tag H263 with Sorenson Spark */
1341 if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1342 !memcmp(codec_name, "Sorenson H263", 13))
1343 st->codec->codec_id = AV_CODEC_ID_FLV1;
1344
1345 st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1346 color_table_id = avio_rb16(pb); /* colortable id */
1347 av_log(c->fc, AV_LOG_TRACE, "depth %d, ctab id %d\n",
1348 st->codec->bits_per_coded_sample, color_table_id);
1349 /* figure out the palette situation */
1350 color_depth = st->codec->bits_per_coded_sample & 0x1F;
1351 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1352
1353 /* if the depth is 2, 4, or 8 bpp, file is palettized */
1354 if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1355 /* for palette traversal */
1356 unsigned int color_start, color_count, color_end;
1357 unsigned char r, g, b;
1358
1359 if (color_greyscale) {
1360 int color_index, color_dec;
1361 /* compute the greyscale palette */
1362 st->codec->bits_per_coded_sample = color_depth;
1363 color_count = 1 << color_depth;
1364 color_index = 255;
1365 color_dec = 256 / (color_count - 1);
1366 for (j = 0; j < color_count; j++) {
1367 r = g = b = color_index;
1368 sc->palette[j] = (r << 16) | (g << 8) | (b);
1369 color_index -= color_dec;
1370 if (color_index < 0)
1371 color_index = 0;
1372 }
1373 } else if (color_table_id) {
1374 const uint8_t *color_table;
1375 /* if flag bit 3 is set, use the default palette */
1376 color_count = 1 << color_depth;
1377 if (color_depth == 2)
1378 color_table = ff_qt_default_palette_4;
1379 else if (color_depth == 4)
1380 color_table = ff_qt_default_palette_16;
1381 else
1382 color_table = ff_qt_default_palette_256;
1383
1384 for (j = 0; j < color_count; j++) {
1385 r = color_table[j * 3 + 0];
1386 g = color_table[j * 3 + 1];
1387 b = color_table[j * 3 + 2];
1388 sc->palette[j] = (r << 16) | (g << 8) | (b);
1389 }
1390 } else {
1391 /* load the palette from the file */
1392 color_start = avio_rb32(pb);
1393 color_count = avio_rb16(pb);
1394 color_end = avio_rb16(pb);
1395 if ((color_start <= 255) && (color_end <= 255)) {
1396 for (j = color_start; j <= color_end; j++) {
1397 /* each R, G, or B component is 16 bits;
1398 * only use the top 8 bits; skip alpha bytes
1399 * up front */
1400 avio_r8(pb);
1401 avio_r8(pb);
1402 r = avio_r8(pb);
1403 avio_r8(pb);
1404 g = avio_r8(pb);
1405 avio_r8(pb);
1406 b = avio_r8(pb);
1407 avio_r8(pb);
1408 sc->palette[j] = (r << 16) | (g << 8) | (b);
1409 }
1410 }
1411 }
1412 sc->has_palette = 1;
1413 }
1414 }
1415
1416 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1417 AVStream *st, MOVStreamContext *sc)
1418 {
1419 int bits_per_sample, flags;
1420 uint16_t version = avio_rb16(pb);
1421
1422 avio_rb16(pb); /* revision level */
1423 avio_rb32(pb); /* vendor */
1424
1425 st->codec->channels = avio_rb16(pb); /* channel count */
1426 st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1427 av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codec->channels);
1428
1429 sc->audio_cid = avio_rb16(pb);
1430 avio_rb16(pb); /* packet size = 0 */
1431
1432 st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1433
1434 // Read QT version 1 fields. In version 0 these do not exist.
1435 av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1436 if (!c->isom) {
1437 if (version == 1) {
1438 sc->samples_per_frame = avio_rb32(pb);
1439 avio_rb32(pb); /* bytes per packet */
1440 sc->bytes_per_frame = avio_rb32(pb);
1441 avio_rb32(pb); /* bytes per sample */
1442 } else if (version == 2) {
1443 avio_rb32(pb); /* sizeof struct only */
1444 st->codec->sample_rate = av_int2double(avio_rb64(pb));
1445 st->codec->channels = avio_rb32(pb);
1446 avio_rb32(pb); /* always 0x7F000000 */
1447 st->codec->bits_per_coded_sample = avio_rb32(pb);
1448
1449 flags = avio_rb32(pb); /* lpcm format specific flag */
1450 sc->bytes_per_frame = avio_rb32(pb);
1451 sc->samples_per_frame = avio_rb32(pb);
1452 if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1453 st->codec->codec_id =
1454 ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
1455 flags);
1456 }
1457 }
1458
1459 switch (st->codec->codec_id) {
1460 case AV_CODEC_ID_PCM_S8:
1461 case AV_CODEC_ID_PCM_U8:
1462 if (st->codec->bits_per_coded_sample == 16)
1463 st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1464 break;
1465 case AV_CODEC_ID_PCM_S16LE:
1466 case AV_CODEC_ID_PCM_S16BE:
1467 if (st->codec->bits_per_coded_sample == 8)
1468 st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1469 else if (st->codec->bits_per_coded_sample == 24)
1470 st->codec->codec_id =
1471 st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1472 AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1473 break;
1474 /* set values for old format before stsd version 1 appeared */
1475 case AV_CODEC_ID_MACE3:
1476 sc->samples_per_frame = 6;
1477 sc->bytes_per_frame = 2 * st->codec->channels;
1478 break;
1479 case AV_CODEC_ID_MACE6:
1480 sc->samples_per_frame = 6;
1481 sc->bytes_per_frame = 1 * st->codec->channels;
1482 break;
1483 case AV_CODEC_ID_ADPCM_IMA_QT:
1484 sc->samples_per_frame = 64;
1485 sc->bytes_per_frame = 34 * st->codec->channels;
1486 break;
1487 case AV_CODEC_ID_GSM:
1488 sc->samples_per_frame = 160;
1489 sc->bytes_per_frame = 33;
1490 break;
1491 default:
1492 break;
1493 }
1494
1495 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1496 if (bits_per_sample) {
1497 st->codec->bits_per_coded_sample = bits_per_sample;
1498 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1499 }
1500 }
1501
1502 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
1503 AVStream *st, MOVStreamContext *sc,
1504 int size)
1505 {
1506 // ttxt stsd contains display flags, justification, background
1507 // color, fonts, and default styles, so fake an atom to read it
1508 MOVAtom fake_atom = { .size = size };
1509 // mp4s contains a regular esds atom
1510 if (st->codec->codec_tag != AV_RL32("mp4s"))
1511 mov_read_glbl(c, pb, fake_atom);
1512 st->codec->width = sc->width;
1513 st->codec->height = sc->height;
1514 }
1515
1516 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1517 {
1518 uint8_t r, g, b;
1519 int y, cb, cr;
1520
1521 y = (ycbcr >> 16) & 0xFF;
1522 cr = (ycbcr >> 8) & 0xFF;
1523 cb = ycbcr & 0xFF;
1524
1525 b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
1526 g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
1527 r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
1528
1529 return (r << 16) | (g << 8) | b;
1530 }
1531
1532 static int mov_rewrite_dvd_sub_extradata(AVStream *st)
1533 {
1534 char buf[256] = {0};
1535 uint8_t *src = st->codec->extradata;
1536 int i;
1537
1538 if (st->codec->extradata_size != 64)
1539 return 0;
1540
1541 if (st->codec->width > 0 && st->codec->height > 0)
1542 snprintf(buf, sizeof(buf), "size: %dx%d\n",
1543 st->codec->width, st->codec->height);
1544 av_strlcat(buf, "palette: ", sizeof(buf));
1545
1546 for (i = 0; i < 16; i++) {
1547 uint32_t yuv = AV_RB32(src + i * 4);
1548 uint32_t rgba = yuv_to_rgba(yuv);
1549
1550 av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1551 }
1552
1553 if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1554 return 0;
1555
1556 av_freep(&st->codec->extradata);
1557 st->codec->extradata_size = 0;
1558 st->codec->extradata = av_mallocz(strlen(buf) + FF_INPUT_BUFFER_PADDING_SIZE);
1559 if (!st->codec->extradata)
1560 return AVERROR(ENOMEM);
1561 st->codec->extradata_size = strlen(buf);
1562 memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1563
1564 return 0;
1565 }
1566
1567 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
1568 AVStream *st, MOVStreamContext *sc,
1569 int size)
1570 {
1571 if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1572 st->codec->extradata_size = size;
1573 st->codec->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
1574 if (!st->codec->extradata)
1575 return AVERROR(ENOMEM);
1576 avio_read(pb, st->codec->extradata, size);
1577 } else {
1578 /* other codec type, just skip (rtp, mp4s ...) */
1579 avio_skip(pb, size);
1580 }
1581 return 0;
1582 }
1583
1584 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
1585 AVStream *st, MOVStreamContext *sc)
1586 {
1587 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1588 !st->codec->sample_rate && sc->time_scale > 1)
1589 st->codec->sample_rate = sc->time_scale;
1590
1591 /* special codec parameters handling */
1592 switch (st->codec->codec_id) {
1593 #if CONFIG_DV_DEMUXER
1594 case AV_CODEC_ID_DVAUDIO:
1595 c->dv_fctx = avformat_alloc_context();
1596 c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1597 if (!c->dv_demux) {
1598 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1599 return AVERROR(ENOMEM);
1600 }
1601 sc->dv_audio_container = 1;
1602 st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1603 break;
1604 #endif
1605 /* no ifdef since parameters are always those */
1606 case AV_CODEC_ID_QCELP:
1607 st->codec->channels = 1;
1608 // force sample rate for qcelp when not stored in mov
1609 if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1610 st->codec->sample_rate = 8000;
1611 break;
1612 case AV_CODEC_ID_AMR_NB:
1613 st->codec->channels = 1;
1614 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1615 st->codec->sample_rate = 8000;
1616 break;
1617 case AV_CODEC_ID_AMR_WB:
1618 st->codec->channels = 1;
1619 st->codec->sample_rate = 16000;
1620 break;
1621 case AV_CODEC_ID_MP2:
1622 case AV_CODEC_ID_MP3:
1623 /* force type after stsd for m1a hdlr */
1624 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1625 st->need_parsing = AVSTREAM_PARSE_FULL;
1626 break;
1627 case AV_CODEC_ID_GSM:
1628 case AV_CODEC_ID_ADPCM_MS:
1629 case AV_CODEC_ID_ADPCM_IMA_WAV:
1630 case AV_CODEC_ID_ILBC:
1631 st->codec->block_align = sc->bytes_per_frame;
1632 break;
1633 case AV_CODEC_ID_ALAC:
1634 if (st->codec->extradata_size == 36) {
1635 st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1636 st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1637 }
1638 break;
1639 case AV_CODEC_ID_VC1:
1640 st->need_parsing = AVSTREAM_PARSE_FULL;
1641 break;
1642 default:
1643 break;
1644 }
1645 return 0;
1646 }
1647
1648 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
1649 int codec_tag, int format,
1650 int size)
1651 {
1652 int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1653
1654 if (codec_tag &&
1655 (codec_tag == AV_RL32("avc1") ||
1656 codec_tag == AV_RL32("hvc1") ||
1657 codec_tag == AV_RL32("hev1") ||
1658 (codec_tag != format &&
1659 (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1660 : codec_tag != MKTAG('j','p','e','g'))))) {
1661 /* Multiple fourcc, we skip JPEG. This is not correct, we should
1662 * export it as a separate AVStream but this needs a few changes
1663 * in the MOV demuxer, patch welcome. */
1664
1665 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1666 avio_skip(pb, size);
1667 return 1;
1668 }
1669
1670 return 0;
1671 }
1672
1673 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1674 {
1675 AVStream *st;
1676 MOVStreamContext *sc;
1677 int pseudo_stream_id;
1678
1679 if (c->fc->nb_streams < 1)
1680 return 0;
1681 st = c->fc->streams[c->fc->nb_streams-1];
1682 sc = st->priv_data;
1683
1684 for (pseudo_stream_id = 0;
1685 pseudo_stream_id < entries && !pb->eof_reached;
1686 pseudo_stream_id++) {
1687 //Parsing Sample description table
1688 enum AVCodecID id;
1689 int ret, dref_id = 1;
1690 MOVAtom a = { AV_RL32("stsd") };
1691 int64_t start_pos = avio_tell(pb);
1692 uint32_t size = avio_rb32(pb); /* size */
1693 uint32_t format = avio_rl32(pb); /* data format */
1694
1695 if (size >= 16) {
1696 avio_rb32(pb); /* reserved */
1697 avio_rb16(pb); /* reserved */
1698 dref_id = avio_rb16(pb);
1699 } else {
1700 av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRIu32" in stsd\n", size);
1701 return AVERROR_INVALIDDATA;
1702 }
1703
1704 if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1705 size - (avio_tell(pb) - start_pos)))
1706 continue;
1707
1708 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1709 sc->dref_id= dref_id;
1710
1711 id = mov_codec_id(st, format);
1712
1713 av_log(c->fc, AV_LOG_TRACE, "size=%"PRIu32" 4CC= %"PRIu8"%"PRIu8"%"PRIu8"%"PRIu8" codec_type=%d\n", size,
1714 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1715 (format >> 24) & 0xff, st->codec->codec_type);
1716
1717 if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1718 st->codec->codec_id = id;
1719 mov_parse_stsd_video(c, pb, st, sc);
1720 } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1721 st->codec->codec_id = id;
1722 mov_parse_stsd_audio(c, pb, st, sc);
1723 } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1724 st->codec->codec_id = id;
1725 mov_parse_stsd_subtitle(c, pb, st, sc,
1726 size - (avio_tell(pb) - start_pos));
1727 } else {
1728 ret = mov_parse_stsd_data(c, pb, st, sc,
1729 size - (avio_tell(pb) - start_pos));
1730 if (ret < 0)
1731 return ret;
1732 }
1733 /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1734 a.size = size - (avio_tell(pb) - start_pos);
1735 if (a.size > 8) {
1736 if ((ret = mov_read_default(c, pb, a)) < 0)
1737 return ret;
1738 } else if (a.size > 0)
1739 avio_skip(pb, a.size);
1740 }
1741
1742 if (pb->eof_reached)
1743 return AVERROR_EOF;
1744
1745 return mov_finalize_stsd_codec(c, pb, st, sc);
1746 }
1747
1748 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1749 {
1750 int entries;
1751
1752 avio_r8(pb); /* version */
1753 avio_rb24(pb); /* flags */
1754 entries = avio_rb32(pb);
1755
1756 return ff_mov_read_stsd_entries(c, pb, entries);
1757 }
1758
1759 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1760 {
1761 AVStream *st;
1762 MOVStreamContext *sc;
1763 unsigned int i, entries;
1764
1765 if (c->fc->nb_streams < 1)
1766 return 0;
1767 st = c->fc->streams[c->fc->nb_streams-1];
1768 sc = st->priv_data;
1769
1770 avio_r8(pb); /* version */
1771 avio_rb24(pb); /* flags */
1772
1773 entries = avio_rb32(pb);
1774
1775 av_log(c->fc, AV_LOG_TRACE, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1776
1777 if (!entries)
1778 return 0;
1779 if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1780 return AVERROR_INVALIDDATA;
1781 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1782 if (!sc->stsc_data)
1783 return AVERROR(ENOMEM);
1784
1785 for (i = 0; i < entries && !pb->eof_reached; i++) {
1786 sc->stsc_data[i].first = avio_rb32(pb);
1787 sc->stsc_data[i].count = avio_rb32(pb);
1788 sc->stsc_data[i].id = avio_rb32(pb);
1789 }
1790
1791 sc->stsc_count = i;
1792
1793 if (pb->eof_reached)
1794 return AVERROR_EOF;
1795
1796 return 0;
1797 }
1798
1799 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1800 {
1801 AVStream *st;
1802 MOVStreamContext *sc;
1803 unsigned i, entries;
1804
1805 if (c->fc->nb_streams < 1)
1806 return 0;
1807 st = c->fc->streams[c->fc->nb_streams-1];
1808 sc = st->priv_data;
1809
1810 avio_rb32(pb); // version + flags
1811
1812 entries = avio_rb32(pb);
1813 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1814 return AVERROR_INVALIDDATA;
1815 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1816 if (!sc->stps_data)
1817 return AVERROR(ENOMEM);
1818
1819 for (i = 0; i < entries && !pb->eof_reached; i++) {
1820 sc->stps_data[i] = avio_rb32(pb);
1821 //av_log(c->fc, AV_LOG_TRACE, "stps %d\n", sc->stps_data[i]);
1822 }
1823
1824 sc->stps_count = i;
1825
1826 if (pb->eof_reached)
1827 return AVERROR_EOF;
1828
1829 return 0;
1830 }
1831
1832 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1833 {
1834 AVStream *st;
1835 MOVStreamContext *sc;
1836 unsigned int i, entries;
1837
1838 if (c->fc->nb_streams < 1)
1839 return 0;
1840 st = c->fc->streams[c->fc->nb_streams-1];
1841 sc = st->priv_data;
1842
1843 avio_r8(pb); /* version */
1844 avio_rb24(pb); /* flags */
1845
1846 entries = avio_rb32(pb);
1847
1848 av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %d\n", entries);
1849
1850 if (!entries)
1851 {
1852 sc->keyframe_absent = 1;
1853 return 0;
1854 }
1855 if (entries >= UINT_MAX / sizeof(int))
1856 return AVERROR_INVALIDDATA;
1857 av_freep(&sc->keyframes);
1858 sc->keyframes = av_malloc(entries * sizeof(int));
1859 if (!sc->keyframes)
1860 return AVERROR(ENOMEM);
1861
1862 for (i = 0; i < entries && !pb->eof_reached; i++) {
1863 sc->keyframes[i] = avio_rb32(pb);
1864 //av_log(c->fc, AV_LOG_TRACE, "keyframes[]=%d\n", sc->keyframes[i]);
1865 }
1866
1867 sc->keyframe_count = i;
1868
1869 if (pb->eof_reached)
1870 return AVERROR_EOF;
1871
1872 return 0;
1873 }
1874
1875 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1876 {
1877 AVStream *st;
1878 MOVStreamContext *sc;
1879 unsigned int i, entries, sample_size, field_size, num_bytes;
1880 GetBitContext gb;
1881 unsigned char* buf;
1882
1883 if (c->fc->nb_streams < 1)
1884 return 0;
1885 st = c->fc->streams[c->fc->nb_streams-1];
1886 sc = st->priv_data;
1887
1888 avio_r8(pb); /* version */
1889 avio_rb24(pb); /* flags */
1890
1891 if (atom.type == MKTAG('s','t','s','z')) {
1892 sample_size = avio_rb32(pb);
1893 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1894 sc->sample_size = sample_size;
1895 field_size = 32;
1896 } else {
1897 sample_size = 0;
1898 avio_rb24(pb); /* reserved */
1899 field_size = avio_r8(pb);
1900 }
1901 entries = avio_rb32(pb);
1902
1903 av_log(c->fc, AV_LOG_TRACE, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1904
1905 sc->sample_count = entries;
1906 if (sample_size)
1907 return 0;
1908
1909 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1910 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1911 return AVERROR_INVALIDDATA;
1912 }
1913
1914 if (!entries)
1915 return 0;
1916 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1917 return AVERROR_INVALIDDATA;
1918 sc->sample_sizes = av_malloc(entries * sizeof(int));
1919 if (!sc->sample_sizes)
1920 return AVERROR(ENOMEM);
1921
1922 num_bytes = (entries*field_size+4)>>3;
1923
1924 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1925 if (!buf) {
1926 av_freep(&sc->sample_sizes);
1927 return AVERROR(ENOMEM);
1928 }
1929
1930 if (avio_read(pb, buf, num_bytes) < num_bytes) {
1931 av_freep(&sc->sample_sizes);
1932 av_free(buf);
1933 return AVERROR_INVALIDDATA;
1934 }
1935
1936 init_get_bits(&gb, buf, 8*num_bytes);
1937
1938 for (i = 0; i < entries && !pb->eof_reached; i++) {
1939 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1940 sc->data_size += sc->sample_sizes[i];
1941 }
1942
1943 sc->sample_count = i;
1944
1945 av_free(buf);
1946
1947 if (pb->eof_reached)
1948 return AVERROR_EOF;
1949
1950 return 0;
1951 }
1952
1953 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1954 {
1955 AVStream *st;
1956 MOVStreamContext *sc;
1957 unsigned int i, entries;
1958 int64_t duration=0;
1959 int64_t total_sample_count=0;
1960
1961 if (c->fc->nb_streams < 1)
1962 return 0;
1963 st = c->fc->streams[c->fc->nb_streams-1];
1964 sc = st->priv_data;
1965
1966 avio_r8(pb); /* version */
1967 avio_rb24(pb); /* flags */
1968 entries = avio_rb32(pb);
1969
1970 av_log(c->fc, AV_LOG_TRACE, "track[%i].stts.entries = %i\n",
1971 c->fc->nb_streams-1, entries);
1972
1973 if (!entries)
1974 return 0;
1975 if (entries >= UINT_MAX / sizeof(*sc->stts_data))
1976 return AVERROR(EINVAL);
1977
1978 av_free(sc->stts_data);
1979 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1980 if (!sc->stts_data)
1981 return AVERROR(ENOMEM);
1982
1983 for (i = 0; i < entries && !pb->eof_reached; i++) {
1984 int sample_duration;
1985 int sample_count;
1986
1987 sample_count=avio_rb32(pb);
1988 sample_duration = avio_rb32(pb);
1989 if (sample_count < 0) {
1990 av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
1991 return AVERROR_INVALIDDATA;
1992 }
1993 sc->stts_data[i].count= sample_count;
1994 sc->stts_data[i].duration= sample_duration;
1995
1996 av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
1997 sample_count, sample_duration);
1998
1999 duration+=(int64_t)sample_duration*sample_count;
2000 total_sample_count+=sample_count;
2001 }
2002
2003 sc->stts_count = i;
2004
2005 if (pb->eof_reached)
2006 return AVERROR_EOF;
2007
2008 st->nb_frames= total_sample_count;
2009 if (duration)
2010 st->duration= duration;
2011 sc->track_end = duration;
2012 return 0;
2013 }
2014
2015 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2016 {
2017 AVStream *st;
2018 MOVStreamContext *sc;
2019 unsigned int i, entries;
2020
2021 if (c->fc->nb_streams < 1)
2022 return 0;
2023 st = c->fc->streams[c->fc->nb_streams-1];
2024 sc = st->priv_data;
2025
2026 avio_r8(pb); /* version */
2027 avio_rb24(pb); /* flags */
2028 entries = avio_rb32(pb);
2029
2030 av_log(c->fc, AV_LOG_TRACE, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2031
2032 av_freep(&sc->ctts_data);
2033
2034 if (!entries)
2035 return 0;
2036 if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2037 return AVERROR_INVALIDDATA;
2038 sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2039 if (!sc->ctts_data)
2040 return AVERROR(ENOMEM);
2041
2042 for (i = 0; i < entries && !pb->eof_reached; i++) {
2043 int count =avio_rb32(pb);
2044 int duration =avio_rb32(pb);
2045
2046 sc->ctts_data[i].count = count;
2047 sc->ctts_data[i].duration= duration;
2048 if (duration < 0)
2049 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2050 }
2051
2052 sc->ctts_count = i;
2053
2054 if (pb->eof_reached)
2055 return AVERROR_EOF;
2056
2057 av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2058
2059 return 0;
2060 }
2061
2062 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2063 {
2064 AVStream *st;
2065 MOVStreamContext *sc;
2066 unsigned int i, entries;
2067 uint8_t version;
2068 uint32_t grouping_type;
2069
2070 if (c->fc->nb_streams < 1)
2071 return 0;
2072 st = c->fc->streams[c->fc->nb_streams-1];
2073 sc = st->priv_data;
2074
2075 version = avio_r8(pb); /* version */
2076 avio_rb24(pb); /* flags */
2077 grouping_type = avio_rl32(pb);
2078 if (grouping_type != MKTAG( 'r','a','p',' '))
2079 return 0; /* only support 'rap ' grouping */
2080 if (version == 1)
2081 avio_rb32(pb); /* grouping_type_parameter */
2082
2083 entries = avio_rb32(pb);
2084 if (!entries)
2085 return 0;
2086 if (entries >= UINT_MAX / sizeof(*sc->rap_group))
2087 return AVERROR_INVALIDDATA;
2088 sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
2089 if (!sc->rap_group)
2090 return AVERROR(ENOMEM);
2091
2092 for (i = 0; i < entries && !pb->eof_reached; i++) {
2093 sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2094 sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2095 }
2096
2097 sc->rap_group_count = i;
2098
2099 return pb->eof_reached ? AVERROR_EOF : 0;
2100 }
2101
2102 static void mov_build_index(MOVContext *mov, AVStream *st)
2103 {
2104 MOVStreamContext *sc = st->priv_data;
2105 int64_t current_offset;
2106 int64_t current_dts = 0;
2107 unsigned int stts_index = 0;
2108 unsigned int stsc_index = 0;
2109 unsigned int stss_index = 0;
2110 unsigned int stps_index = 0;
2111 unsigned int i, j;
2112 uint64_t stream_size = 0;
2113
2114 /* adjust first dts according to edit list */
2115 if (sc->time_offset && mov->time_scale > 0) {
2116 if (sc->time_offset < 0)
2117 sc->time_offset = av_rescale(sc->time_offset, sc->time_scale, mov->time_scale);
2118 current_dts = -sc->time_offset;
2119 if (sc->ctts_data && sc->stts_data && sc->stts_data[0].duration &&
2120 sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
2121 /* more than 16 frames delay, dts are likely wrong
2122 this happens with files created by iMovie */
2123 sc->wrong_dts = 1;
2124 st->codec->has_b_frames = 1;
2125 }
2126 }
2127
2128 /* only use old uncompressed audio chunk demuxing when stts specifies it */
2129 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2130 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2131 unsigned int current_sample = 0;
2132 unsigned int stts_sample = 0;
2133 unsigned int sample_size;
2134 unsigned int distance = 0;
2135 unsigned int rap_group_index = 0;
2136 unsigned int rap_group_sample = 0;
2137 int rap_group_present = sc->rap_group_count && sc->rap_group;
2138 int key_off = (sc->keyframes && sc->keyframes[0] > 0) || (sc->stps_data && sc->stps_data[0] > 0);
2139
2140 current_dts -= sc->dts_shift;
2141
2142 if (!sc->sample_count)
2143 return;
2144 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2145 return;
2146 if (av_reallocp_array(&st->index_entries,
2147 st->nb_index_entries + sc->sample_count,
2148 sizeof(*st->index_entries)) < 0) {
2149 st->nb_index_entries = 0;
2150 return;
2151 }
2152 st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
2153
2154 for (i = 0; i < sc->chunk_count; i++) {
2155 current_offset = sc->chunk_offsets[i];
2156 while (stsc_index + 1 < sc->stsc_count &&
2157 i + 1 == sc->stsc_data[stsc_index + 1].first)
2158 stsc_index++;
2159 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2160 int keyframe = 0;
2161 if (current_sample >= sc->sample_count) {
2162 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2163 return;
2164 }
2165
2166 if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2167 keyframe = 1;
2168 if (stss_index + 1 < sc->keyframe_count)
2169 stss_index++;
2170 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2171 keyframe = 1;
2172 if (stps_index + 1 < sc->stps_count)
2173 stps_index++;
2174 }
2175 if (rap_group_present && rap_group_index < sc->rap_group_count) {
2176 if (sc->rap_group[rap_group_index].index > 0)
2177 keyframe = 1;
2178 if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2179 rap_group_sample = 0;
2180 rap_group_index++;
2181 }
2182 }
2183 if (keyframe)
2184 distance = 0;
2185 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
2186 if (sc->pseudo_stream_id == -1 ||
2187 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2188 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2189 e->pos = current_offset;
2190 e->timestamp = current_dts;
2191 e->size = sample_size;
2192 e->min_distance = distance;
2193 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2194 av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2195 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2196 current_offset, current_dts, sample_size, distance, keyframe);
2197 }
2198
2199 current_offset += sample_size;
2200 stream_size += sample_size;
2201 current_dts += sc->stts_data[stts_index].duration;
2202 distance++;
2203 stts_sample++;
2204 current_sample++;
2205 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2206 stts_sample = 0;
2207 stts_index++;
2208 }
2209 }
2210 }
2211 if (st->duration > 0)
2212 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2213 } else {
2214 unsigned chunk_samples, total = 0;
2215
2216 // compute total chunk count
2217 for (i = 0; i < sc->stsc_count; i++) {
2218 unsigned count, chunk_count;
2219
2220 chunk_samples = sc->stsc_data[i].count;
2221 if (i != sc->stsc_count - 1 &&
2222 sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2223 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2224 return;
2225 }
2226
2227 if (sc->samples_per_frame >= 160) { // gsm
2228 count = chunk_samples / sc->samples_per_frame;
2229 } else if (sc->samples_per_frame > 1) {
2230 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2231 count = (chunk_samples+samples-1) / samples;
2232 } else {
2233 count = (chunk_samples+1023) / 1024;
2234 }
2235
2236 if (i < sc->stsc_count - 1)
2237 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2238 else
2239 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2240 total += chunk_count * count;
2241 }
2242
2243 av_log(mov->fc, AV_LOG_TRACE, "chunk count %d\n", total);
2244 if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2245 return;
2246 if (av_reallocp_array(&st->index_entries,
2247 st->nb_index_entries + total,
2248 sizeof(*st->index_entries)) < 0) {
2249 st->nb_index_entries = 0;
2250 return;
2251 }
2252 st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2253
2254 // populate index
2255 for (i = 0; i < sc->chunk_count; i++) {
2256 current_offset = sc->chunk_offsets[i];
2257 if (stsc_index + 1 < sc->stsc_count &&
2258 i + 1 == sc->stsc_data[stsc_index + 1].first)
2259 stsc_index++;
2260 chunk_samples = sc->stsc_data[stsc_index].count;
2261
2262 while (chunk_samples > 0) {
2263 AVIndexEntry *e;
2264 unsigned size, samples;
2265
2266 if (sc->samples_per_frame >= 160) { // gsm
2267 samples = sc->samples_per_frame;
2268 size = sc->bytes_per_frame;
2269 } else {
2270 if (sc->samples_per_frame > 1) {
2271 samples = FFMIN((1024 / sc->samples_per_frame)*
2272 sc->samples_per_frame, chunk_samples);
2273 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2274 } else {
2275 samples = FFMIN(1024, chunk_samples);
2276 size = samples * sc->sample_size;
2277 }
2278 }
2279
2280 if (st->nb_index_entries >= total) {
2281 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2282 return;
2283 }
2284 e = &st->index_entries[st->nb_index_entries++];
2285 e->pos = current_offset;
2286 e->timestamp = current_dts;
2287 e->size = size;
2288 e->min_distance = 0;
2289 e->flags = AVINDEX_KEYFRAME;
2290 av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2291 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2292 size, samples);
2293
2294 current_offset += size;
2295 current_dts += samples;
2296 chunk_samples -= samples;
2297 }
2298 }
2299 }
2300 }
2301
2302 static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref,
2303 AVIOInterruptCB *int_cb)
2304 {
2305 /* try relative path, we do not try the absolute because it can leak information about our
2306 system to an attacker */
2307 if (ref->nlvl_to > 0 && ref->nlvl_from > 0 && ref->path[0] != '/') {
2308 char filename[1024];
2309 char *src_path;
2310 int i, l;
2311
2312 /* find a source dir */
2313 src_path = strrchr(src, '/');
2314 if (src_path)
2315 src_path++;
2316 else
2317 src_path = src;
2318
2319 /* find a next level down to target */
2320 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2321 if (ref->path[l] == '/') {
2322 if (i == ref->nlvl_to - 1)
2323 break;
2324 else
2325 i++;
2326 }
2327
2328 /* compose filename if next level down to target was found */
2329 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2330 memcpy(filename, src, src_path - src);
2331 filename[src_path - src] = 0;
2332
2333 for (i = 1; i < ref->nlvl_from; i++)
2334 av_strlcat(filename, "../", 1024);
2335
2336 av_strlcat(filename, ref->path + l + 1, 1024);
2337
2338 if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2339 return 0;
2340 }
2341 }
2342
2343 return AVERROR(ENOENT);
2344 }
2345
2346 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2347 {
2348 AVStream *st;
2349 MOVStreamContext *sc;
2350 int ret;
2351
2352 st = avformat_new_stream(c->fc, NULL);
2353 if (!st) return AVERROR(ENOMEM);
2354 st->id = c->fc->nb_streams;
2355 sc = av_mallocz(sizeof(MOVStreamContext));
2356 if (!sc) return AVERROR(ENOMEM);
2357
2358 st->priv_data = sc;
2359 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2360 sc->ffindex = st->index;
2361
2362 if ((ret = mov_read_default(c, pb, atom)) < 0)
2363 return ret;
2364
2365 /* sanity checks */
2366 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2367 (!sc->sample_size && !sc->sample_count))) {
2368 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2369 st->index);
2370 return 0;
2371 }
2372
2373 if (sc->time_scale <= 0) {
2374 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
2375 sc->time_scale = c->time_scale;
2376 if (sc->time_scale <= 0)
2377 sc->time_scale = 1;
2378 }
2379
2380 avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2381
2382 mov_build_index(c, st);
2383
2384 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2385 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2386 if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback) < 0)
2387 av_log(c->fc, AV_LOG_ERROR,
2388 "stream %d, error opening alias: path='%s', dir='%s', "
2389 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2390 st->index, dref->path, dref->dir, dref->filename,
2391 dref->volume, dref->nlvl_from, dref->nlvl_to);
2392 } else
2393 sc->pb = c->fc->pb;
2394
2395 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2396 if (!st->sample_aspect_ratio.num &&
2397 (st->codec->width != sc->width || st->codec->height != sc->height)) {
2398 st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2399 ((double)st->codec->width * sc->height), INT_MAX);
2400 }
2401 }
2402
2403 // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2404 if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2405 TAG_IS_AVCI(st->codec->codec_tag)) {
2406 ret = ff_generate_avci_extradata(st);
2407 if (ret < 0)
2408 return ret;
2409 }
2410
2411 switch (st->codec->codec_id) {
2412 #if CONFIG_H261_DECODER
2413 case AV_CODEC_ID_H261:
2414 #endif
2415 #if CONFIG_H263_DECODER
2416 case AV_CODEC_ID_H263:
2417 #endif
2418 #if CONFIG_MPEG4_DECODER
2419 case AV_CODEC_ID_MPEG4:
2420 #endif
2421 st->codec->width = 0; /* let decoder init width/height */
2422 st->codec->height= 0;
2423 break;
2424 }
2425
2426 /* Do not need those anymore. */
2427 av_freep(&sc->chunk_offsets);
2428 av_freep(&sc->stsc_data);
2429 av_freep(&sc->sample_sizes);
2430 av_freep(&sc->keyframes);
2431 av_freep(&sc->stts_data);
2432 av_freep(&sc->stps_data);
2433 av_freep(&sc->rap_group);
2434
2435 return 0;
2436 }
2437
2438 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2439 {
2440 int ret;
2441 c->itunes_metadata = 1;
2442 ret = mov_read_default(c, pb, atom);
2443 c->itunes_metadata = 0;
2444 return ret;
2445 }
2446
2447 static int mov_read_replaygain(MOVContext *c, AVIOContext *pb, int size)
2448 {
2449 int64_t end = avio_tell(pb) + size;
2450 uint8_t *key = NULL, *val = NULL;
2451 int i;
2452
2453 for (i = 0; i < 2; i++) {
2454 uint8_t **p;
2455 uint32_t len, tag;
2456
2457 if (end - avio_tell(pb) <= 12)
2458 break;
2459
2460 len = avio_rb32(pb);
2461 tag = avio_rl32(pb);
2462 avio_skip(pb, 4); // flags
2463
2464 if (len < 12 || len - 12 > end - avio_tell(pb))
2465 break;
2466 len -= 12;
2467
2468 if (tag == MKTAG('n', 'a', 'm', 'e'))
2469 p = &key;
2470 else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
2471 avio_skip(pb, 4);
2472 len -= 4;
2473 p = &val;
2474 } else
2475 break;
2476
2477 *p = av_malloc(len + 1);
2478 if (!*p)
2479 break;
2480 avio_read(pb, *p, len);
2481 (*p)[len] = 0;
2482 }
2483
2484 if (key && val) {
2485 av_dict_set(&c->fc->metadata, key, val,
2486 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
2487 key = val = NULL;
2488 }
2489
2490 avio_seek(pb, end, SEEK_SET);
2491 av_freep(&key);
2492 av_freep(&val);
2493 return 0;
2494 }
2495
2496 static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2497 {
2498 int64_t end = avio_tell(pb) + atom.size;
2499 uint32_t tag, len;
2500
2501 if (atom.size < 8)
2502 goto fail;
2503
2504 len = avio_rb32(pb);
2505 tag = avio_rl32(pb);
2506
2507 if (len > atom.size)
2508 goto fail;
2509
2510 if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
2511 uint8_t domain[128];
2512 int domain_len;
2513
2514 avio_skip(pb, 4); // flags
2515 len -= 12;
2516
2517 domain_len = avio_get_str(pb, len, domain, sizeof(domain));
2518 avio_skip(pb, len - domain_len);
2519 if (!strcmp(domain, "org.hydrogenaudio.replaygain"))
2520 return mov_read_replaygain(c, pb, end - avio_tell(pb));
2521 }
2522
2523 fail:
2524 av_log(c->fc, AV_LOG_VERBOSE,
2525 "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
2526 return 0;
2527 }
2528
2529 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2530 {
2531 while (atom.size > 8) {
2532 uint32_t tag = avio_rl32(pb);
2533 atom.size -= 4;
2534 if (tag == MKTAG('h','d','l','r')) {
2535 avio_seek(pb, -8, SEEK_CUR);
2536 atom.size += 8;
2537 return mov_read_default(c, pb, atom);
2538 }
2539 }
2540 return 0;
2541 }
2542
2543 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2544 {
2545 int i;
2546 int width;
2547 int height;
2548 int64_t disp_transform[2];
2549 int display_matrix[3][3];
2550 AVStream *st;
2551 MOVStreamContext *sc;
2552 int version;
2553 int flags;
2554
2555 if (c->fc->nb_streams < 1)
2556 return 0;
2557 st = c->fc->streams[c->fc->nb_streams-1];
2558 sc = st->priv_data;
2559
2560 version = avio_r8(pb);
2561 flags = avio_rb24(pb);
2562 st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
2563
2564 if (version == 1) {
2565 avio_rb64(pb);
2566 avio_rb64(pb);
2567 } else {
2568 avio_rb32(pb); /* creation time */
2569 avio_rb32(pb); /* modification time */
2570 }
2571 st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2572 avio_rb32(pb); /* reserved */
2573
2574 /* highlevel (considering edits) duration in movie timebase */
2575 (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2576 avio_rb32(pb); /* reserved */
2577 avio_rb32(pb); /* reserved */
2578
2579 avio_rb16(pb); /* layer */
2580 avio_rb16(pb); /* alternate group */
2581 avio_rb16(pb); /* volume */
2582 avio_rb16(pb); /* reserved */
2583
2584 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2585 // they're kept in fixed point format through all calculations
2586 // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
2587 // side data, but the scale factor is not needed to calculate aspect ratio
2588 for (i = 0; i < 3; i++) {
2589 display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2590 display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2591 display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
2592 }
2593
2594 width = avio_rb32(pb); // 16.16 fixed point track width
2595 height = avio_rb32(pb); // 16.16 fixed point track height
2596 sc->width = width >> 16;
2597 sc->height = height >> 16;
2598
2599 // save the matrix when it is not the default identity
2600 if (display_matrix[0][0] != (1 << 16) ||
2601 display_matrix[1][1] != (1 << 16) ||
2602 display_matrix[2][2] != (1 << 30) ||
2603 display_matrix[0][1] || display_matrix[0][2] ||
2604 display_matrix[1][0] || display_matrix[1][2] ||
2605 display_matrix[2][0] || display_matrix[2][1]) {
2606 int i, j;
2607
2608 av_freep(&sc->display_matrix);
2609 sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
2610 if (!sc->display_matrix)
2611 return AVERROR(ENOMEM);
2612
2613 for (i = 0; i < 3; i++)
2614 for (j = 0; j < 3; j++)
2615 sc->display_matrix[i * 3 + j] = display_matrix[i][j];
2616 }
2617
2618 // transform the display width/height according to the matrix
2619 // skip this when the display matrix is the identity one
2620 // to keep the same scale, use [width height 1<<16]
2621 if (width && height && sc->display_matrix) {
2622 for (i = 0; i < 2; i++)
2623 disp_transform[i] =
2624 (int64_t) width * display_matrix[0][i] +
2625 (int64_t) height * display_matrix[1][i] +
2626 ((int64_t) display_matrix[2][i] << 16);
2627
2628 //sample aspect ratio is new width/height divided by old width/height
2629 if (disp_transform[0] > 0 && disp_transform[1] > 0)
2630 st->sample_aspect_ratio = av_d2q(
2631 ((double) disp_transform[0] * height) /
2632 ((double) disp_transform[1] * width), INT_MAX);
2633 }
2634 return 0;
2635 }
2636
2637 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2638 {
2639 MOVFragment *frag = &c->fragment;
2640 MOVTrackExt *trex = NULL;
2641 int flags, track_id, i;
2642
2643 avio_r8(pb); /* version */
2644 flags = avio_rb24(pb);
2645
2646 track_id = avio_rb32(pb);
2647 if (!track_id)
2648 return AVERROR_INVALIDDATA;
2649 frag->track_id = track_id;
2650 for (i = 0; i < c->trex_count; i++)
2651 if (c->trex_data[i].track_id == frag->track_id) {
2652 trex = &c->trex_data[i];
2653 break;
2654 }
2655 if (!trex) {
2656 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2657 return AVERROR_INVALIDDATA;
2658 }
2659
2660 frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
2661 avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
2662 frag->moof_offset : frag->implicit_offset;
2663 frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2664
2665 frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2666 avio_rb32(pb) : trex->duration;
2667 frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2668 avio_rb32(pb) : trex->size;
2669 frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2670 avio_rb32(pb) : trex->flags;
2671 av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
2672 return 0;
2673 }
2674
2675 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2676 {
2677 c->chapter_track = avio_rb32(pb);
2678 return 0;
2679 }
2680
2681 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2682 {
2683 MOVTrackExt *trex;
2684 int err;
2685
2686 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2687 return AVERROR_INVALIDDATA;
2688 if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2689 sizeof(*c->trex_data))) < 0) {
2690 c->trex_count = 0;
2691 return err;
2692 }
2693 trex = &c->trex_data[c->trex_count++];
2694 avio_r8(pb); /* version */
2695 avio_rb24(pb); /* flags */
2696 trex->track_id = avio_rb32(pb);
2697 trex->stsd_id = avio_rb32(pb);
2698 trex->duration = avio_rb32(pb);
2699 trex->size = avio_rb32(pb);
2700 trex->flags = avio_rb32(pb);
2701 return 0;
2702 }
2703
2704 static int mov_read_tfdt(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2705 {
2706 MOVFragment *frag = &c->fragment;
2707 AVStream *st = NULL;
2708 MOVStreamContext *sc;
2709 int version, i;
2710
2711 for (i = 0; i < c->fc->nb_streams; i++) {
2712 if (c->fc->streams[i]->id == frag->track_id) {
2713 st = c->fc->streams[i];
2714 break;
2715 }
2716 }
2717 if (!st) {
2718 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2719 return AVERROR_INVALIDDATA;
2720 }
2721 sc = st->priv_data;
2722 if (sc->pseudo_stream_id + 1 != frag->stsd_id)
2723 return 0;
2724 version = avio_r8(pb);
2725 avio_rb24(pb); /* flags */
2726 if (version) {
2727 sc->track_end = avio_rb64(pb);
2728 } else {
2729 sc->track_end = avio_rb32(pb);
2730 }
2731 return 0;
2732 }
2733
2734 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2735 {
2736 MOVFragment *frag = &c->fragment;
2737 AVStream *st = NULL;
2738 MOVStreamContext *sc;
2739 MOVStts *ctts_data;
2740 uint64_t offset;
2741 int64_t dts;
2742 int data_offset = 0;
2743 unsigned entries, first_sample_flags = frag->flags;
2744 int flags, distance, i, found_keyframe = 0, err;
2745
2746 for (i = 0; i < c->fc->nb_streams; i++) {
2747 if (c->fc->streams[i]->id == frag->track_id) {
2748 st = c->fc->streams[i];
2749 break;
2750 }
2751 }
2752 if (!st) {
2753 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2754 return AVERROR_INVALIDDATA;
2755 }
2756 sc = st->priv_data;
2757 if (sc->pseudo_stream_id+1 != frag->stsd_id)
2758 return 0;
2759 avio_r8(pb); /* version */
2760 flags = avio_rb24(pb);
2761 entries = avio_rb32(pb);
2762 av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %d\n", flags, entries);
2763
2764 /* Always assume the presence of composition time offsets.
2765 * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2766 * 1) in the initial movie, there are no samples.
2767 * 2) in the first movie fragment, there is only one sample without composition time offset.
2768 * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2769 if (!sc->ctts_count && sc->sample_count)
2770 {
2771 /* Complement ctts table if moov atom doesn't have ctts atom. */
2772 ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
2773 if (!ctts_data)
2774 return AVERROR(ENOMEM);
2775 sc->ctts_data = ctts_data;
2776 sc->ctts_data[sc->ctts_count].count = sc->sample_count;
2777 sc->ctts_data[sc->ctts_count].duration = 0;
2778 sc->ctts_count++;
2779 }
2780 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2781 return AVERROR_INVALIDDATA;
2782 if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
2783 sizeof(*sc->ctts_data))) < 0) {
2784 sc->ctts_count = 0;
2785 return err;
2786 }
2787 if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
2788 if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
2789 dts = sc->track_end - sc->time_offset;
2790 offset = frag->base_data_offset + data_offset;
2791 distance = 0;
2792 av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
2793 for (i = 0; i < entries && !pb->eof_reached; i++) {
2794 unsigned sample_size = frag->size;
2795 int sample_flags = i ? frag->flags : first_sample_flags;
2796 unsigned sample_duration = frag->duration;
2797 int keyframe = 0;
2798
2799 if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
2800 if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
2801 if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
2802 sc->ctts_data[sc->ctts_count].count = 1;
2803 sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
2804 avio_rb32(pb) : 0;
2805 sc->ctts_count++;
2806 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2807 keyframe = 1;
2808 else if (!found_keyframe)
2809 keyframe = found_keyframe =
2810 !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
2811 MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
2812 if (keyframe)
2813 distance = 0;
2814 av_add_index_entry(st, offset, dts, sample_size, distance,
2815 keyframe ? AVINDEX_KEYFRAME : 0);
2816 av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2817 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2818 offset, dts, sample_size, distance, keyframe);
2819 distance++;
2820 dts += sample_duration;
2821 offset += sample_size;
2822 sc->data_size += sample_size;
2823 }
2824
2825 if (pb->eof_reached)
2826 return AVERROR_EOF;
2827
2828 frag->implicit_offset = offset;
2829 st->duration = sc->track_end = dts + sc->time_offset;
2830 return 0;
2831 }
2832
2833 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2834 /* like the files created with Adobe Premiere 5.0, for samples see */
2835 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2836 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2837 {
2838 int err;
2839
2840 if (atom.size < 8)
2841 return 0; /* continue */
2842 if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2843 avio_skip(pb, atom.size - 4);
2844 return 0;
2845 }
2846 atom.type = avio_rl32(pb);
2847 atom.size -= 8;
2848 if (atom.type != MKTAG('m','d','a','t')) {
2849 avio_skip(pb, atom.size);
2850 return 0;
2851 }
2852 err = mov_read_mdat(c, pb, atom);
2853 return err;
2854 }
2855
2856 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2857 {
2858 #if CONFIG_ZLIB
2859 AVIOContext ctx;
2860 uint8_t *cmov_data;
2861 uint8_t *moov_data; /* uncompressed data */
2862 long cmov_len, moov_len;
2863 int ret = -1;
2864
2865 avio_rb32(pb); /* dcom atom */
2866 if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2867 return AVERROR_INVALIDDATA;
2868 if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2869 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2870 return AVERROR_INVALIDDATA;
2871 }
2872 avio_rb32(pb); /* cmvd atom */
2873 if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2874 return AVERROR_INVALIDDATA;
2875 moov_len = avio_rb32(pb); /* uncompressed size */
2876 cmov_len = atom.size - 6 * 4;
2877
2878 cmov_data = av_malloc(cmov_len);
2879 if (!cmov_data)
2880 return AVERROR(ENOMEM);
2881 moov_data = av_malloc(moov_len);
2882 if (!moov_data) {
2883 av_free(cmov_data);
2884 return AVERROR(ENOMEM);
2885 }
2886 avio_read(pb, cmov_data, cmov_len);
2887 if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2888 goto free_and_return;
2889 if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2890 goto free_and_return;
2891 atom.type = MKTAG('m','o','o','v');
2892 atom.size = moov_len;
2893 ret = mov_read_default(c, &ctx, atom);
2894 free_and_return:
2895 av_free(moov_data);
2896 av_free(cmov_data);
2897 return ret;
2898 #else
2899 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2900 return AVERROR(ENOSYS);
2901 #endif
2902 }
2903
2904 /* edit list atom */
2905 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2906 {
2907 MOVStreamContext *sc;
2908 int i, edit_count, version;
2909
2910 if (c->fc->nb_streams < 1)
2911 return 0;
2912 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2913
2914 version = avio_r8(pb); /* version */
2915 avio_rb24(pb); /* flags */
2916 edit_count = avio_rb32(pb); /* entries */
2917
2918 if ((uint64_t)edit_count*12+8 > atom.size)
2919 return AVERROR_INVALIDDATA;
2920
2921 for (i=0; i<edit_count; i++){
2922 int64_t time;
2923 int64_t duration;
2924 if (version == 1) {
2925 duration = avio_rb64(pb);
2926 time = avio_rb64(pb);
2927 } else {
2928 duration = avio_rb32(pb); /* segment duration */
2929 time = (int32_t)avio_rb32(pb); /* media time */
2930 }
2931 avio_rb32(pb); /* Media rate */
2932 if (i == 0 && time >= -1) {
2933 sc->time_offset = time != -1 ? time : -duration;
2934 }
2935 }
2936
2937 if (edit_count > 1)
2938 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2939 "a/v desync might occur, patch welcome\n");
2940
2941 av_log(c->fc, AV_LOG_TRACE, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2942 return 0;