mov: Do not try to parse multiple stsd for the same track
[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 "libavutil/pixdesc.h"
40 #include "libavutil/spherical.h"
41 #include "libavutil/stereo3d.h"
42
43 #include "libavcodec/ac3tab.h"
44 #include "libavcodec/bitstream.h"
45
46 #include "avformat.h"
47 #include "internal.h"
48 #include "avio_internal.h"
49 #include "riff.h"
50 #include "isom.h"
51 #include "id3v1.h"
52 #include "mov_chan.h"
53 #include "replaygain.h"
54
55 #if CONFIG_ZLIB
56 #include <zlib.h>
57 #endif
58
59 #include "qtpalette.h"
60
61
62 /* those functions parse an atom */
63 /* links atom IDs to parse functions */
64 typedef struct MOVParseTableEntry {
65 uint32_t type;
66 int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
67 } MOVParseTableEntry;
68
69 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
70
71 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
72 unsigned len, const char *key)
73 {
74 char buf[16];
75
76 short current, total = 0;
77 avio_rb16(pb); // unknown
78 current = avio_rb16(pb);
79 if (len >= 6)
80 total = avio_rb16(pb);
81 if (!total)
82 snprintf(buf, sizeof(buf), "%d", current);
83 else
84 snprintf(buf, sizeof(buf), "%d/%d", current, total);
85 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
86 av_dict_set(&c->fc->metadata, key, buf, 0);
87
88 return 0;
89 }
90
91 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
92 unsigned len, const char *key)
93 {
94 char buf[16];
95
96 /* bypass padding bytes */
97 avio_r8(pb);
98 avio_r8(pb);
99 avio_r8(pb);
100
101 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
102 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
103 av_dict_set(&c->fc->metadata, key, buf, 0);
104
105 return 0;
106 }
107
108 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
109 unsigned len, const char *key)
110 {
111 char buf[16];
112
113 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
114 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
115 av_dict_set(&c->fc->metadata, key, buf, 0);
116
117 return 0;
118 }
119
120 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
121 unsigned len, const char *key)
122 {
123 short genre;
124 char buf[20];
125
126 avio_r8(pb); // unknown
127
128 genre = avio_r8(pb);
129 if (genre < 1 || genre > ID3v1_GENRE_MAX)
130 return 0;
131 snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
132 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
133 av_dict_set(&c->fc->metadata, key, buf, 0);
134
135 return 0;
136 }
137
138 static const uint32_t mac_to_unicode[128] = {
139 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
140 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
141 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
142 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
143 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
144 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
145 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
146 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
147 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
148 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
149 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
150 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
151 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
152 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
153 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
154 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
155 };
156
157 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
158 char *dst, int dstlen)
159 {
160 char *p = dst;
161 char *end = dst+dstlen-1;
162 int i;
163
164 for (i = 0; i < len; i++) {
165 uint8_t t, c = avio_r8(pb);
166
167 if (p >= end)
168 continue;
169
170 if (c < 0x80)
171 *p++ = c;
172 else
173 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
174 }
175 *p = 0;
176 return p - dst;
177 }
178
179 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
180 {
181 AVPacket pkt;
182 AVStream *st;
183 MOVStreamContext *sc;
184 enum AVCodecID id;
185 int ret;
186
187 switch (type) {
188 case 0xd: id = AV_CODEC_ID_MJPEG; break;
189 case 0xe: id = AV_CODEC_ID_PNG; break;
190 case 0x1b: id = AV_CODEC_ID_BMP; break;
191 default:
192 av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
193 avio_skip(pb, len);
194 return 0;
195 }
196
197 st = avformat_new_stream(c->fc, NULL);
198 if (!st)
199 return AVERROR(ENOMEM);
200 sc = av_mallocz(sizeof(*sc));
201 if (!sc)
202 return AVERROR(ENOMEM);
203 st->priv_data = sc;
204
205 ret = av_get_packet(pb, &pkt, len);
206 if (ret < 0)
207 return ret;
208
209 if (pkt.size >= 8 && id != AV_CODEC_ID_BMP) {
210 if (AV_RB64(pkt.data) == 0x89504e470d0a1a0a) {
211 id = AV_CODEC_ID_PNG;
212 } else {
213 id = AV_CODEC_ID_MJPEG;
214 }
215 }
216
217 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
218
219 st->attached_pic = pkt;
220 st->attached_pic.stream_index = st->index;
221 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
222
223 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
224 st->codecpar->codec_id = id;
225
226 return 0;
227 }
228
229 // 3GPP TS 26.244
230 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
231 {
232 char language[4] = { 0 };
233 char buf[200], place[100];
234 uint16_t langcode = 0;
235 double longitude, latitude, altitude;
236 const char *key = "location";
237
238 if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
239 av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
240 return AVERROR_INVALIDDATA;
241 }
242
243 avio_skip(pb, 4); // version+flags
244 langcode = avio_rb16(pb);
245 ff_mov_lang_to_iso639(langcode, language);
246 len -= 6;
247
248 len -= avio_get_str(pb, len, place, sizeof(place));
249 if (len < 1) {
250 av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
251 return AVERROR_INVALIDDATA;
252 }
253 avio_skip(pb, 1); // role
254 len -= 1;
255
256 if (len < 12) {
257 av_log(c->fc, AV_LOG_ERROR,
258 "loci too short (%u bytes left, need at least %d)\n", len, 12);
259 return AVERROR_INVALIDDATA;
260 }
261 longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
262 latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
263 altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
264
265 // Try to output in the same format as the ?xyz field
266 snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
267 if (altitude)
268 av_strlcatf(buf, sizeof(buf), "%+f", altitude);
269 av_strlcatf(buf, sizeof(buf), "/%s", place);
270
271 if (*language && strcmp(language, "und")) {
272 char key2[16];
273 snprintf(key2, sizeof(key2), "%s-%s", key, language);
274 av_dict_set(&c->fc->metadata, key2, buf, 0);
275 }
276 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
277 return av_dict_set(&c->fc->metadata, key, buf, 0);
278 }
279
280 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
281 {
282 char tmp_key[5];
283 char *str, key2[32], language[4] = {0};
284 const char *key = NULL;
285 uint16_t langcode = 0;
286 uint32_t data_type = 0, str_size, str_size_alloc;
287 int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
288 int raw = 0;
289
290 switch (atom.type) {
291 case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
292 case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
293 case MKTAG( 'X','M','P','_'):
294 if (c->export_xmp) { key = "xmp"; raw = 1; } break;
295 case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
296 case MKTAG( 'a','k','I','D'): key = "account_type";
297 parse = mov_metadata_int8_no_padding; break;
298 case MKTAG( 'a','p','I','D'): key = "account_id"; break;
299 case MKTAG( 'c','a','t','g'): key = "category"; break;
300 case MKTAG( 'c','p','i','l'): key = "compilation";
301 parse = mov_metadata_int8_no_padding; break;
302 case MKTAG( 'c','p','r','t'): key = "copyright"; break;
303 case MKTAG( 'd','e','s','c'): key = "description"; break;
304 case MKTAG( 'd','i','s','k'): key = "disc";
305 parse = mov_metadata_track_or_disc_number; break;
306 case MKTAG( 'e','g','i','d'): key = "episode_uid";
307 parse = mov_metadata_int8_no_padding; break;
308 case MKTAG( 'g','n','r','e'): key = "genre";
309 parse = mov_metadata_gnre; break;
310 case MKTAG( 'h','d','v','d'): key = "hd_video";
311 parse = mov_metadata_int8_no_padding; break;
312 case MKTAG( 'k','e','y','w'): key = "keywords"; break;
313 case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
314 case MKTAG( 'l','o','c','i'):
315 return mov_metadata_loci(c, pb, atom.size);
316 case MKTAG( 'p','c','s','t'): key = "podcast";
317 parse = mov_metadata_int8_no_padding; break;
318 case MKTAG( 'p','g','a','p'): key = "gapless_playback";
319 parse = mov_metadata_int8_no_padding; break;
320 case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
321 case MKTAG( 'r','t','n','g'): key = "rating";
322 parse = mov_metadata_int8_no_padding; break;
323 case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
324 case MKTAG( 's','o','a','l'): key = "sort_album"; break;
325 case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
326 case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
327 case MKTAG( 's','o','n','m'): key = "sort_name"; break;
328 case MKTAG( 's','o','s','n'): key = "sort_show"; break;
329 case MKTAG( 's','t','i','k'): key = "media_type";
330 parse = mov_metadata_int8_no_padding; break;
331 case MKTAG( 't','r','k','n'): key = "track";
332 parse = mov_metadata_track_or_disc_number; break;
333 case MKTAG( 't','v','e','n'): key = "episode_id"; break;
334 case MKTAG( 't','v','e','s'): key = "episode_sort";
335 parse = mov_metadata_int8_bypass_padding; break;
336 case MKTAG( 't','v','n','n'): key = "network"; break;
337 case MKTAG( 't','v','s','h'): key = "show"; break;
338 case MKTAG( 't','v','s','n'): key = "season_number";
339 parse = mov_metadata_int8_bypass_padding; break;
340 case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
341 case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
342 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
343 case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
344 case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
345 case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
346 case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
347 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
348 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
349 case MKTAG(0xa9,'d','i','r'): key = "director"; break;
350 case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
351 case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
352 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
353 case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
354 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
355 case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
356 case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
357 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
358 case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
359 case MKTAG(0xa9,'m','a','k'): key = "make"; break;
360 case MKTAG(0xa9,'m','o','d'): key = "model"; break;
361 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
362 case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
363 case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
364 case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
365 case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
366 case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
367 case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
368 case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
369 case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
370 case MKTAG(0xa9,'t','r','k'): key = "track"; break;
371 case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
372 case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
373 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
374 case MKTAG(0xa9,'x','y','z'): key = "location"; break;
375 }
376
377 if (c->itunes_metadata && atom.size > 8) {
378 int data_size = avio_rb32(pb);
379 int tag = avio_rl32(pb);
380 if (tag == MKTAG('d','a','t','a')) {
381 data_type = avio_rb32(pb); // type
382 avio_rb32(pb); // unknown
383 str_size = data_size - 16;
384 atom.size -= 16;
385
386 if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
387 int ret = mov_read_covr(c, pb, data_type, str_size);
388 if (ret < 0) {
389 av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
390 return ret;
391 }
392 }
393 } else return 0;
394 } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
395 str_size = avio_rb16(pb); // string length
396 langcode = avio_rb16(pb);
397 ff_mov_lang_to_iso639(langcode, language);
398 atom.size -= 4;
399 } else
400 str_size = atom.size;
401
402 if (c->export_all && !key) {
403 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
404 key = tmp_key;
405 }
406
407 if (!key)
408 return 0;
409 if (atom.size < 0)
410 return AVERROR_INVALIDDATA;
411
412 // allocate twice as much as worst-case
413 str_size_alloc = (raw ? str_size : str_size * 2) + 1;
414 str = av_malloc(str_size_alloc);
415 if (!str)
416 return AVERROR(ENOMEM);
417
418 if (parse)
419 parse(c, pb, str_size, key);
420 else {
421 if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
422 mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
423 } else {
424 int ret = ffio_read_size(pb, str, str_size);
425 if (ret < 0) {
426 av_free(str);
427 return ret;
428 }
429 str[str_size] = 0;
430 }
431 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
432 av_dict_set(&c->fc->metadata, key, str, 0);
433 if (*language && strcmp(language, "und")) {
434 snprintf(key2, sizeof(key2), "%s-%s", key, language);
435 av_dict_set(&c->fc->metadata, key2, str, 0);
436 }
437 }
438
439 av_freep(&str);
440 return 0;
441 }
442
443 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
444 {
445 int64_t start;
446 int i, nb_chapters, str_len, version;
447 char str[256+1];
448 int ret;
449
450 if ((atom.size -= 5) < 0)
451 return 0;
452
453 version = avio_r8(pb);
454 avio_rb24(pb);
455 if (version)
456 avio_rb32(pb); // ???
457 nb_chapters = avio_r8(pb);
458
459 for (i = 0; i < nb_chapters; i++) {
460 if (atom.size < 9)
461 return 0;
462
463 start = avio_rb64(pb);
464 str_len = avio_r8(pb);
465
466 if ((atom.size -= 9+str_len) < 0)
467 return 0;
468
469 ret = ffio_read_size(pb, str, str_len);
470 if (ret < 0)
471 return ret;
472 str[str_len] = 0;
473 avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
474 }
475 return 0;
476 }
477
478 #define MIN_DATA_ENTRY_BOX_SIZE 12
479 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
480 {
481 AVStream *st;
482 MOVStreamContext *sc;
483 int entries, i, j;
484
485 if (c->fc->nb_streams < 1)
486 return 0;
487 st = c->fc->streams[c->fc->nb_streams-1];
488 sc = st->priv_data;
489
490 avio_rb32(pb); // version + flags
491 entries = avio_rb32(pb);
492 if (!entries ||
493 entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
494 entries >= UINT_MAX / sizeof(*sc->drefs))
495 return AVERROR_INVALIDDATA;
496 sc->drefs_count = 0;
497 av_free(sc->drefs);
498 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
499 if (!sc->drefs)
500 return AVERROR(ENOMEM);
501 sc->drefs_count = entries;
502
503 for (i = 0; i < entries; i++) {
504 MOVDref *dref = &sc->drefs[i];
505 uint32_t size = avio_rb32(pb);
506 int64_t next = avio_tell(pb) + size - 4;
507
508 if (size < 12)
509 return AVERROR_INVALIDDATA;
510
511 dref->type = avio_rl32(pb);
512 avio_rb32(pb); // version + flags
513
514 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
515 /* macintosh alias record */
516 uint16_t volume_len, len;
517 int16_t type;
518 int ret;
519
520 avio_skip(pb, 10);
521
522 volume_len = avio_r8(pb);
523 volume_len = FFMIN(volume_len, 27);
524 ret = ffio_read_size(pb, dref->volume, 27);
525 if (ret < 0)
526 return ret;
527 dref->volume[volume_len] = 0;
528 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %"PRIu16"\n",
529 dref->volume, volume_len);
530
531 avio_skip(pb, 12);
532
533 len = avio_r8(pb);
534 len = FFMIN(len, 63);
535 ret = ffio_read_size(pb, dref->filename, 63);
536 if (ret < 0)
537 return ret;
538 dref->filename[len] = 0;
539 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %"PRIu16"\n",
540 dref->filename, len);
541
542 avio_skip(pb, 16);
543
544 /* read next level up_from_alias/down_to_target */
545 dref->nlvl_from = avio_rb16(pb);
546 dref->nlvl_to = avio_rb16(pb);
547 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %"PRId16", nlvl to %"PRId16"\n",
548 dref->nlvl_from, dref->nlvl_to);
549
550 avio_skip(pb, 16);
551
552 for (type = 0; type != -1 && avio_tell(pb) < next; ) {
553 if (pb->eof_reached)
554 return AVERROR_EOF;
555 type = avio_rb16(pb);
556 len = avio_rb16(pb);
557 av_log(c->fc, AV_LOG_DEBUG, "type %"PRId16", len %"PRIu16"\n",
558 type, len);
559 if (len&1)
560 len += 1;
561 if (type == 2) { // absolute path
562 av_free(dref->path);
563 dref->path = av_mallocz(len+1);
564 if (!dref->path)
565 return AVERROR(ENOMEM);
566
567 ret = ffio_read_size(pb, dref->path, len);
568 if (ret < 0) {
569 av_freep(&dref->path);
570 return ret;
571 }
572 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
573 len -= volume_len;
574 memmove(dref->path, dref->path+volume_len, len);
575 dref->path[len] = 0;
576 }
577 // trim string of any ending zeros
578 for (j = len - 1; j >= 0; j--) {
579 if (dref->path[j] == 0)
580 len--;
581 else
582 break;
583 }
584 for (j = 0; j < len; j++)
585 if (dref->path[j] == ':' || dref->path[j] == 0)
586 dref->path[j] = '/';
587 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
588 } else if (type == 0) { // directory name
589 av_free(dref->dir);
590 dref->dir = av_malloc(len+1);
591 if (!dref->dir)
592 return AVERROR(ENOMEM);
593
594 ret = ffio_read_size(pb, dref->dir, len);
595 if (ret < 0) {
596 av_freep(&dref->dir);
597 return ret;
598 }
599 dref->dir[len] = 0;
600 for (j = 0; j < len; j++)
601 if (dref->dir[j] == ':')
602 dref->dir[j] = '/';
603 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
604 } else
605 avio_skip(pb, len);
606 }
607 } else {
608 av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x08%"PRIx32" size %"PRIu32"\n",
609 dref->type, size);
610 entries--;
611 i--;
612 }
613 avio_seek(pb, next, SEEK_SET);
614 }
615 return 0;
616 }
617
618 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
619 {
620 AVStream *st;
621 uint32_t type;
622 uint32_t av_unused ctype;
623 int64_t title_size;
624 char *title_str;
625 int ret;
626
627 if (c->fc->nb_streams < 1) // meta before first trak
628 return 0;
629
630 st = c->fc->streams[c->fc->nb_streams-1];
631
632 avio_r8(pb); /* version */
633 avio_rb24(pb); /* flags */
634
635 /* component type */
636 ctype = avio_rl32(pb);
637 type = avio_rl32(pb); /* component subtype */
638
639 av_log(c->fc, AV_LOG_TRACE, "ctype= %.4s (0x%08"PRIx32")\n", (char *)&ctype, ctype);
640 av_log(c->fc, AV_LOG_TRACE, "stype= %.4s\n", (char*)&type);
641
642 if (type == MKTAG('v','i','d','e'))
643 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
644 else if (type == MKTAG('s','o','u','n'))
645 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
646 else if (type == MKTAG('m','1','a',' '))
647 st->codecpar->codec_id = AV_CODEC_ID_MP2;
648 else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
649 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
650
651 avio_rb32(pb); /* component manufacture */
652 avio_rb32(pb); /* component flags */
653 avio_rb32(pb); /* component flags mask */
654
655 title_size = atom.size - 24;
656 if (title_size > 0) {
657 title_str = av_malloc(title_size + 1); /* Add null terminator */
658 if (!title_str)
659 return AVERROR(ENOMEM);
660
661 ret = ffio_read_size(pb, title_str, title_size);
662 if (ret < 0) {
663 av_freep(&title_str);
664 return ret;
665 }
666 title_str[title_size] = 0;
667 if (title_str[0]) {
668 int off = (!c->isom && title_str[0] == title_size - 1);
669 av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
670 }
671 av_freep(&title_str);
672 }
673
674 return 0;
675 }
676
677 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
678 {
679 AVStream *st;
680 int tag;
681
682 if (fc->nb_streams < 1)
683 return 0;
684 st = fc->streams[fc->nb_streams-1];
685
686 avio_rb32(pb); /* version + flags */
687 ff_mp4_read_descr(fc, pb, &tag);
688 if (tag == MP4ESDescrTag) {
689 ff_mp4_parse_es_descr(pb, NULL);
690 } else
691 avio_rb16(pb); /* ID */
692
693 ff_mp4_read_descr(fc, pb, &tag);
694 if (tag == MP4DecConfigDescrTag)
695 ff_mp4_read_dec_config_descr(fc, st, pb);
696 return 0;
697 }
698
699 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
700 {
701 return ff_mov_read_esds(c->fc, pb);
702 }
703
704 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
705 {
706 AVStream *st;
707 enum AVAudioServiceType *ast;
708 int ac3info, acmod, lfeon, bsmod;
709
710 if (c->fc->nb_streams < 1)
711 return 0;
712 st = c->fc->streams[c->fc->nb_streams-1];
713
714 ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
715 sizeof(*ast));
716 if (!ast)
717 return AVERROR(ENOMEM);
718
719 ac3info = avio_rb24(pb);
720 bsmod = (ac3info >> 14) & 0x7;
721 acmod = (ac3info >> 11) & 0x7;
722 lfeon = (ac3info >> 10) & 0x1;
723 st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
724 st->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
725 if (lfeon)
726 st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
727 *ast = bsmod;
728 if (st->codecpar->channels > 1 && bsmod == 0x7)
729 *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
730
731 #if FF_API_LAVF_AVCTX
732 FF_DISABLE_DEPRECATION_WARNINGS
733 st->codec->audio_service_type = *ast;
734 FF_ENABLE_DEPRECATION_WARNINGS
735 #endif
736
737 return 0;
738 }
739
740 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
741 {
742 AVStream *st;
743 enum AVAudioServiceType *ast;
744 int eac3info, acmod, lfeon, bsmod;
745
746 if (c->fc->nb_streams < 1)
747 return 0;
748 st = c->fc->streams[c->fc->nb_streams-1];
749
750 ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
751 sizeof(*ast));
752 if (!ast)
753 return AVERROR(ENOMEM);
754
755 /* No need to parse fields for additional independent substreams and its
756 * associated dependent substreams since libavcodec's E-AC-3 decoder
757 * does not support them yet. */
758 avio_rb16(pb); /* data_rate and num_ind_sub */
759 eac3info = avio_rb24(pb);
760 bsmod = (eac3info >> 12) & 0x1f;
761 acmod = (eac3info >> 9) & 0x7;
762 lfeon = (eac3info >> 8) & 0x1;
763 st->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
764 if (lfeon)
765 st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
766 st->codecpar->channels = av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
767 *ast = bsmod;
768 if (st->codecpar->channels > 1 && bsmod == 0x7)
769 *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
770
771 #if FF_API_LAVF_AVCTX
772 FF_DISABLE_DEPRECATION_WARNINGS
773 st->codec->audio_service_type = *ast;
774 FF_ENABLE_DEPRECATION_WARNINGS
775 #endif
776
777 return 0;
778 }
779
780 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
781 {
782 AVStream *st;
783
784 if (c->fc->nb_streams < 1)
785 return 0;
786 st = c->fc->streams[c->fc->nb_streams-1];
787
788 if (atom.size < 16)
789 return 0;
790
791 /* skip version and flags */
792 avio_skip(pb, 4);
793
794 ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
795
796 return 0;
797 }
798
799 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
800 {
801 AVStream *st;
802
803 if (c->fc->nb_streams < 1)
804 return 0;
805 st = c->fc->streams[c->fc->nb_streams-1];
806
807 return ff_get_wav_header(c->fc, pb, st->codecpar, atom.size);
808 }
809
810 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
811 {
812 const int num = avio_rb32(pb);
813 const int den = avio_rb32(pb);
814 AVStream *st;
815
816 if (c->fc->nb_streams < 1)
817 return 0;
818 st = c->fc->streams[c->fc->nb_streams-1];
819
820 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
821 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
822 av_log(c->fc, AV_LOG_WARNING,
823 "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
824 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
825 num, den);
826 } else if (den != 0) {
827 st->sample_aspect_ratio.num = num;
828 st->sample_aspect_ratio.den = den;
829 }
830 return 0;
831 }
832
833 /* this atom contains actual media data */
834 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
835 {
836 if (atom.size == 0) /* wrong one (MP4) */
837 return 0;
838 c->found_mdat=1;
839 return 0; /* now go for moov */
840 }
841
842 /* read major brand, minor version and compatible brands and store them as metadata */
843 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
844 {
845 uint32_t minor_ver;
846 int comp_brand_size;
847 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
848 char* comp_brands_str;
849 uint8_t type[5] = {0};
850 int ret = ffio_read_size(pb, type, 4);
851 if (ret < 0)
852 return ret;
853
854 if (strcmp(type, "qt "))
855 c->isom = 1;
856 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
857 av_dict_set(&c->fc->metadata, "major_brand", type, 0);
858 minor_ver = avio_rb32(pb); /* minor version */
859 snprintf(minor_ver_str, sizeof(minor_ver_str), "%"PRIu32"", minor_ver);
860 av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
861
862 comp_brand_size = atom.size - 8;
863 if (comp_brand_size < 0)
864 return AVERROR_INVALIDDATA;
865 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
866 if (!comp_brands_str)
867 return AVERROR(ENOMEM);
868
869 ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
870 if (ret < 0) {
871 av_freep(&comp_brands_str);
872 return ret;
873 }
874 comp_brands_str[comp_brand_size] = 0;
875 av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
876 av_freep(&comp_brands_str);
877
878 return 0;
879 }
880
881 /* this atom should contain all header atoms */
882 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
883 {
884 int ret;
885
886 if ((ret = mov_read_default(c, pb, atom)) < 0)
887 return ret;
888 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
889 /* so we don't parse the whole file if over a network */
890 c->found_moov=1;
891 return 0; /* now go for mdat */
892 }
893
894 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
895 {
896 c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
897 av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
898 return mov_read_default(c, pb, atom);
899 }
900
901 static void mov_metadata_creation_time(AVDictionary **metadata, time_t time)
902 {
903 char buffer[32];
904 if (time) {
905 struct tm *ptm, tmbuf;
906 time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
907 ptm = gmtime_r(&time, &tmbuf);
908 if (!ptm) return;
909 if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
910 av_dict_set(metadata, "creation_time", buffer, 0);
911 }
912 }
913
914 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
915 {
916 AVStream *st;
917 MOVStreamContext *sc;
918 int version;
919 char language[4] = {0};
920 unsigned lang;
921 time_t creation_time;
922
923 if (c->fc->nb_streams < 1)
924 return 0;
925 st = c->fc->streams[c->fc->nb_streams-1];
926 sc = st->priv_data;
927
928 if (sc->time_scale) {
929 av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
930 return AVERROR_INVALIDDATA;
931 }
932
933 version = avio_r8(pb);
934 if (version > 1) {
935 avpriv_request_sample(c->fc, "Version %d", version);
936 return AVERROR_PATCHWELCOME;
937 }
938 avio_rb24(pb); /* flags */
939 if (version == 1) {
940 creation_time = avio_rb64(pb);
941 avio_rb64(pb);
942 } else {
943 creation_time = avio_rb32(pb);
944 avio_rb32(pb); /* modification time */
945 }
946 mov_metadata_creation_time(&st->metadata, creation_time);
947
948 sc->time_scale = avio_rb32(pb);
949 st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
950
951 lang = avio_rb16(pb); /* language */
952 if (ff_mov_lang_to_iso639(lang, language))
953 av_dict_set(&st->metadata, "language", language, 0);
954 avio_rb16(pb); /* quality */
955
956 return 0;
957 }
958
959 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
960 {
961 int i;
962 time_t creation_time;
963 int version = avio_r8(pb); /* version */
964 avio_rb24(pb); /* flags */
965
966 if (version == 1) {
967 creation_time = avio_rb64(pb);
968 avio_rb64(pb);
969 } else {
970 creation_time = avio_rb32(pb);
971 avio_rb32(pb); /* modification time */
972 }
973 mov_metadata_creation_time(&c->fc->metadata, creation_time);
974 c->time_scale = avio_rb32(pb); /* time scale */
975
976 av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
977
978 c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
979 avio_rb32(pb); /* preferred scale */
980
981 avio_rb16(pb); /* preferred volume */
982
983 avio_skip(pb, 10); /* reserved */
984
985 /* movie display matrix, store it in main context and use it later on */
986 for (i = 0; i < 3; i++) {
987 c->movie_display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
988 c->movie_display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
989 c->movie_display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
990 }
991
992 avio_rb32(pb); /* preview time */
993 avio_rb32(pb); /* preview duration */
994 avio_rb32(pb); /* poster time */
995 avio_rb32(pb); /* selection time */
996 avio_rb32(pb); /* selection duration */
997 avio_rb32(pb); /* current time */
998 avio_rb32(pb); /* next track ID */
999
1000 return 0;
1001 }
1002
1003 static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1004 {
1005 AVStream *st;
1006 int ret;
1007
1008 if (c->fc->nb_streams < 1)
1009 return 0;
1010 st = c->fc->streams[c->fc->nb_streams-1];
1011
1012 if ((uint64_t)atom.size > (1<<30))
1013 return AVERROR_INVALIDDATA;
1014
1015 // currently SVQ3 decoder expect full STSD header - so let's fake it
1016 // this should be fixed and just SMI header should be passed
1017 av_free(st->codecpar->extradata);
1018 st->codecpar->extradata = av_mallocz(atom.size + 0x5a + AV_INPUT_BUFFER_PADDING_SIZE);
1019 if (!st->codecpar->extradata)
1020 return AVERROR(ENOMEM);
1021 st->codecpar->extradata_size = 0x5a + atom.size;
1022 memcpy(st->codecpar->extradata, "SVQ3", 4); // fake
1023
1024 ret = ffio_read_size(pb, st->codecpar->extradata + 0x5a, atom.size);
1025 if (ret < 0)
1026 return ret;
1027
1028 av_log(c->fc, AV_LOG_TRACE, "Reading SMI %"PRId64" %s\n", atom.size, st->codecpar->extradata + 0x5a);
1029 return 0;
1030 }
1031
1032 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1033 {
1034 AVStream *st;
1035 int little_endian;
1036
1037 if (c->fc->nb_streams < 1)
1038 return 0;
1039 st = c->fc->streams[c->fc->nb_streams-1];
1040
1041 little_endian = !!avio_rb16(pb);
1042 av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1043 if (little_endian == 1) {
1044 switch (st->codecpar->codec_id) {
1045 case AV_CODEC_ID_PCM_S24BE:
1046 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
1047 break;
1048 case AV_CODEC_ID_PCM_S32BE:
1049 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
1050 break;
1051 case AV_CODEC_ID_PCM_F32BE:
1052 st->codecpar->codec_id = AV_CODEC_ID_PCM_F32LE;
1053 break;
1054 case AV_CODEC_ID_PCM_F64BE:
1055 st->codecpar->codec_id = AV_CODEC_ID_PCM_F64LE;
1056 break;
1057 default:
1058 break;
1059 }
1060 }
1061 return 0;
1062 }
1063
1064 static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1065 {
1066 AVStream *st;
1067 char color_parameter_type[5] = { 0 };
1068 uint16_t color_primaries, color_trc, color_matrix;
1069 int ret;
1070
1071 if (c->fc->nb_streams < 1)
1072 return 0;
1073 st = c->fc->streams[c->fc->nb_streams - 1];
1074
1075 ret = ffio_read_size(pb, color_parameter_type, 4);
1076 if (ret < 0)
1077 return ret;
1078 if (strncmp(color_parameter_type, "nclx", 4) &&
1079 strncmp(color_parameter_type, "nclc", 4)) {
1080 av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1081 color_parameter_type);
1082 return 0;
1083 }
1084
1085 color_primaries = avio_rb16(pb);
1086 color_trc = avio_rb16(pb);
1087 color_matrix = avio_rb16(pb);
1088
1089 av_log(c->fc, AV_LOG_TRACE,
1090 "%s: pri %"PRIu16" trc %"PRIu16" matrix %"PRIu16"",
1091 color_parameter_type, color_primaries, color_trc, color_matrix);
1092
1093 if (!strncmp(color_parameter_type, "nclx", 4)) {
1094 uint8_t color_range = avio_r8(pb) >> 7;
1095 av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1096 if (color_range)
1097 st->codecpar->color_range = AVCOL_RANGE_JPEG;
1098 else
1099 st->codecpar->color_range = AVCOL_RANGE_MPEG;
1100
1101 if (!av_color_primaries_name(color_primaries))
1102 color_primaries = AVCOL_PRI_UNSPECIFIED;
1103 if (!av_color_transfer_name(color_trc))
1104 color_trc = AVCOL_TRC_UNSPECIFIED;
1105 if (!av_color_space_name(color_matrix))
1106 color_matrix = AVCOL_SPC_UNSPECIFIED;
1107
1108 st->codecpar->color_primaries = color_primaries;
1109 st->codecpar->color_trc = color_trc;
1110 st->codecpar->color_space = color_matrix;
1111 } else if (!strncmp(color_parameter_type, "nclc", 4)) {
1112 /* color primaries, Table 4-4 */
1113 switch (color_primaries) {
1114 case 1: st->codecpar->color_primaries = AVCOL_PRI_BT709; break;
1115 case 5: st->codecpar->color_primaries = AVCOL_PRI_SMPTE170M; break;
1116 case 6: st->codecpar->color_primaries = AVCOL_PRI_SMPTE240M; break;
1117 case 9: st->codecpar->color_primaries = AVCOL_PRI_BT2020; break;
1118 case 10: st->codecpar->color_primaries = AVCOL_PRI_SMPTE431; break;
1119 case 11: st->codecpar->color_primaries = AVCOL_PRI_SMPTE432; break;
1120 }
1121 /* color transfer, Table 4-5 */
1122 switch (color_trc) {
1123 case 1: st->codecpar->color_trc = AVCOL_TRC_BT709; break;
1124 case 7: st->codecpar->color_trc = AVCOL_TRC_SMPTE240M; break;
1125 case 17: st->codecpar->color_trc = AVCOL_TRC_SMPTE428; break;
1126 }
1127 /* color matrix, Table 4-6 */
1128 switch (color_matrix) {
1129 case 1: st->codecpar->color_space = AVCOL_SPC_BT709; break;
1130 case 6: st->codecpar->color_space = AVCOL_SPC_BT470BG; break;
1131 case 7: st->codecpar->color_space = AVCOL_SPC_SMPTE240M; break;
1132 case 9: st->codecpar->color_space = AVCOL_SPC_BT2020_NCL; break;
1133 }
1134 }
1135 av_log(c->fc, AV_LOG_TRACE, "\n");
1136
1137 return 0;
1138 }
1139
1140 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1141 {
1142 AVStream *st;
1143 unsigned mov_field_order;
1144 enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1145
1146 if (c->fc->nb_streams < 1) // will happen with jp2 files
1147 return 0;
1148 st = c->fc->streams[c->fc->nb_streams-1];
1149 if (atom.size < 2)
1150 return AVERROR_INVALIDDATA;
1151 mov_field_order = avio_rb16(pb);
1152 if ((mov_field_order & 0xFF00) == 0x0100)
1153 decoded_field_order = AV_FIELD_PROGRESSIVE;
1154 else if ((mov_field_order & 0xFF00) == 0x0200) {
1155 switch (mov_field_order & 0xFF) {
1156 case 0x01: decoded_field_order = AV_FIELD_TT;
1157 break;
1158 case 0x06: decoded_field_order = AV_FIELD_BB;
1159 break;
1160 case 0x09: decoded_field_order = AV_FIELD_TB;
1161 break;
1162 case 0x0E: decoded_field_order = AV_FIELD_BT;
1163 break;
1164 }
1165 }
1166 if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1167 av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1168 }
1169 st->codecpar->field_order = decoded_field_order;
1170
1171 return 0;
1172 }
1173
1174 /* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1175 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1176 {
1177 AVStream *st;
1178 uint64_t size;
1179 uint8_t *buf;
1180 int err;
1181
1182 if (c->fc->nb_streams < 1) // will happen with jp2 files
1183 return 0;
1184 st= c->fc->streams[c->fc->nb_streams-1];
1185 size= (uint64_t)st->codecpar->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1186 if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1187 return AVERROR_INVALIDDATA;
1188 if ((err = av_reallocp(&st->codecpar->extradata, size)) < 0) {
1189 st->codecpar->extradata_size = 0;
1190 return err;
1191 }
1192 buf = st->codecpar->extradata + st->codecpar->extradata_size;
1193 st->codecpar->extradata_size= size - AV_INPUT_BUFFER_PADDING_SIZE;
1194 AV_WB32( buf , atom.size + 8);
1195 AV_WL32( buf + 4, atom.type);
1196
1197 err = ffio_read_size(pb, buf + 8, atom.size);
1198 if (err < 0)
1199 return err;
1200
1201 return 0;
1202 }
1203
1204 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1205 {
1206 AVStream *st;
1207 int ret;
1208
1209 if (c->fc->nb_streams < 1)
1210 return 0;
1211 st = c->fc->streams[c->fc->nb_streams-1];
1212
1213 if ((uint64_t)atom.size > (1<<30))
1214 return AVERROR_INVALIDDATA;
1215
1216 if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 || st->codecpar->codec_id == AV_CODEC_ID_QDMC) {
1217 // pass all frma atom to codec, needed at least for QDMC and QDM2
1218 av_free(st->codecpar->extradata);
1219 st->codecpar->extradata = av_mallocz(atom.size + AV_INPUT_BUFFER_PADDING_SIZE);
1220 if (!st->codecpar->extradata)
1221 return AVERROR(ENOMEM);
1222 st->codecpar->extradata_size = atom.size;
1223
1224 ret = ffio_read_size(pb, st->codecpar->extradata, atom.size);
1225 if (ret < 0)
1226 return ret;
1227 } else if (atom.size > 8) { /* to read frma, esds atoms */
1228 if ((ret = mov_read_default(c, pb, atom)) < 0)
1229 return ret;
1230 } else
1231 avio_skip(pb, atom.size);
1232 return 0;
1233 }
1234
1235 /**
1236 * This function reads atom content and puts data in extradata without tag
1237 * nor size unlike mov_read_extradata.
1238 */
1239 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1240 {
1241 AVStream *st;
1242 int ret;
1243
1244 if (c->fc->nb_streams < 1)
1245 return 0;
1246 st = c->fc->streams[c->fc->nb_streams-1];
1247
1248 if ((uint64_t)atom.size > (1<<30))
1249 return AVERROR_INVALIDDATA;
1250
1251 if (atom.size >= 10) {
1252 // Broken files created by legacy versions of libavformat will
1253 // wrap a whole fiel atom inside of a glbl atom.
1254 unsigned size = avio_rb32(pb);
1255 unsigned type = avio_rl32(pb);
1256 avio_seek(pb, -8, SEEK_CUR);
1257 if (type == MKTAG('f','i','e','l') && size == atom.size)
1258 return mov_read_default(c, pb, atom);
1259 }
1260 av_free(st->codecpar->extradata);
1261 st->codecpar->extradata = av_mallocz(atom.size + AV_INPUT_BUFFER_PADDING_SIZE);
1262 if (!st->codecpar->extradata)
1263 return AVERROR(ENOMEM);
1264 st->codecpar->extradata_size = atom.size;
1265
1266 ret = ffio_read_size(pb, st->codecpar->extradata, atom.size);
1267 if (ret < 0)
1268 return ret;
1269
1270 return 0;
1271 }
1272
1273 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1274 {
1275 AVStream *st;
1276 uint8_t profile_level;
1277 int ret;
1278
1279 if (c->fc->nb_streams < 1)
1280 return 0;
1281 st = c->fc->streams[c->fc->nb_streams-1];
1282
1283 if (atom.size >= (1<<28) || atom.size < 7)
1284 return AVERROR_INVALIDDATA;
1285
1286 profile_level = avio_r8(pb);
1287 if ((profile_level & 0xf0) != 0xc0)
1288 return 0;
1289
1290 av_free(st->codecpar->extradata);
1291 st->codecpar->extradata = av_mallocz(atom.size - 7 + AV_INPUT_BUFFER_PADDING_SIZE);
1292 if (!st->codecpar->extradata)
1293 return AVERROR(ENOMEM);
1294 st->codecpar->extradata_size = atom.size - 7;
1295 avio_seek(pb, 6, SEEK_CUR);
1296
1297 ret = ffio_read_size(pb, st->codecpar->extradata, st->codecpar->extradata_size);
1298 if (ret < 0)
1299 return ret;
1300
1301 return 0;
1302 }
1303
1304 /**
1305 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1306 * but can have extradata appended at the end after the 40 bytes belonging
1307 * to the struct.
1308 */
1309 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1310 {
1311 AVStream *st;
1312 int ret;
1313
1314 if (c->fc->nb_streams < 1)
1315 return 0;
1316 if (atom.size <= 40)
1317 return 0;
1318 st = c->fc->streams[c->fc->nb_streams-1];
1319
1320 if ((uint64_t)atom.size > (1<<30))
1321 return AVERROR_INVALIDDATA;
1322
1323 av_free(st->codecpar->extradata);
1324 st->codecpar->extradata = av_mallocz(atom.size - 40 + AV_INPUT_BUFFER_PADDING_SIZE);
1325 if (!st->codecpar->extradata)
1326 return AVERROR(ENOMEM);
1327 st->codecpar->extradata_size = atom.size - 40;
1328 avio_skip(pb, 40);
1329
1330 ret = ffio_read_size(pb, st->codecpar->extradata, atom.size - 40);
1331 if (ret < 0)
1332 return ret;
1333
1334 return 0;
1335 }
1336
1337 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1338 {
1339 AVStream *st;
1340 MOVStreamContext *sc;
1341 unsigned int i, entries;
1342
1343 if (c->fc->nb_streams < 1)
1344 return 0;
1345 st = c->fc->streams[c->fc->nb_streams-1];
1346 sc = st->priv_data;
1347
1348 avio_r8(pb); /* version */
1349 avio_rb24(pb); /* flags */
1350
1351 entries = avio_rb32(pb);
1352
1353 if (!entries)
1354 return 0;
1355 if (entries >= UINT_MAX/sizeof(int64_t))
1356 return AVERROR_INVALIDDATA;
1357
1358 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1359 if (!sc->chunk_offsets)
1360 return AVERROR(ENOMEM);
1361 sc->chunk_count = entries;
1362
1363 if (atom.type == MKTAG('s','t','c','o'))
1364 for (i = 0; i < entries && !pb->eof_reached; i++)
1365 sc->chunk_offsets[i] = avio_rb32(pb);
1366 else if (atom.type == MKTAG('c','o','6','4'))
1367 for (i = 0; i < entries && !pb->eof_reached; i++)
1368 sc->chunk_offsets[i] = avio_rb64(pb);
1369 else
1370 return AVERROR_INVALIDDATA;
1371
1372 sc->chunk_count = i;
1373
1374 if (pb->eof_reached)
1375 return AVERROR_EOF;
1376
1377 return 0;
1378 }
1379
1380 /**
1381 * Compute codec id for 'lpcm' tag.
1382 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1383 */
1384 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1385 {
1386 /* lpcm flags:
1387 * 0x1 = float
1388 * 0x2 = big-endian
1389 * 0x4 = signed
1390 */
1391 return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1392 }
1393
1394 static int mov_codec_id(AVStream *st, uint32_t format)
1395 {
1396 int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1397
1398 if (id <= 0 &&
1399 ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1400 (format & 0xFFFF) == 'T' + ('S' << 8)))
1401 id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1402
1403 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1404 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1405 } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1406 /* skip old ASF MPEG-4 tag */
1407 format && format != MKTAG('m','p','4','s')) {
1408 id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1409 if (id <= 0)
1410 id = ff_codec_get_id(ff_codec_bmp_tags, format);
1411 if (id > 0)
1412 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
1413 else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1414 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1415 if (id > 0)
1416 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
1417 }
1418 }
1419
1420 st->codecpar->codec_tag = format;
1421
1422 return id;
1423 }
1424
1425 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1426 AVStream *st, MOVStreamContext *sc)
1427 {
1428 uint8_t codec_name[32];
1429 unsigned int color_depth, len, j;
1430 int color_greyscale;
1431 int color_table_id;
1432
1433 avio_rb16(pb); /* version */
1434 avio_rb16(pb); /* revision level */
1435 avio_rb32(pb); /* vendor */
1436 avio_rb32(pb); /* temporal quality */
1437 avio_rb32(pb); /* spatial quality */
1438
1439 st->codecpar->width = avio_rb16(pb); /* width */
1440 st->codecpar->height = avio_rb16(pb); /* height */
1441
1442 avio_rb32(pb); /* horiz resolution */
1443 avio_rb32(pb); /* vert resolution */
1444 avio_rb32(pb); /* data size, always 0 */
1445 avio_rb16(pb); /* frames per samples */
1446
1447 len = avio_r8(pb); /* codec name, pascal string */
1448 if (len > 31)
1449 len = 31;
1450 mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1451 if (len < 31)
1452 avio_skip(pb, 31 - len);
1453
1454 if (codec_name[0])
1455 av_dict_set(&st->metadata, "encoder", codec_name, 0);
1456
1457 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1458 if (!strncmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1459 st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1460 /* Flash Media Server uses tag H.263 with Sorenson Spark */
1461 if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1462 !strncmp(codec_name, "Sorenson H263", 13))
1463 st->codecpar->codec_id = AV_CODEC_ID_FLV1;
1464
1465 st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1466 color_table_id = avio_rb16(pb); /* colortable id */
1467 av_log(c->fc, AV_LOG_TRACE, "depth %d, ctab id %d\n",
1468 st->codecpar->bits_per_coded_sample, color_table_id);
1469 /* figure out the palette situation */
1470 color_depth = st->codecpar->bits_per_coded_sample & 0x1F;
1471 color_greyscale = st->codecpar->bits_per_coded_sample & 0x20;
1472
1473 /* if the depth is 2, 4, or 8 bpp, file is palettized */
1474 if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1475 /* for palette traversal */
1476 unsigned int color_start, color_count, color_end;
1477 unsigned char r, g, b;
1478
1479 if (color_greyscale) {
1480 int color_index, color_dec;
1481 /* compute the greyscale palette */
1482 st->codecpar->bits_per_coded_sample = color_depth;
1483 color_count = 1 << color_depth;
1484 color_index = 255;
1485 color_dec = 256 / (color_count - 1);
1486 for (j = 0; j < color_count; j++) {
1487 r = g = b = color_index;
1488 sc->palette[j] = (r << 16) | (g << 8) | (b);
1489 color_index -= color_dec;
1490 if (color_index < 0)
1491 color_index = 0;
1492 }
1493 } else if (color_table_id) {
1494 const uint8_t *color_table;
1495 /* if flag bit 3 is set, use the default palette */
1496 color_count = 1 << color_depth;
1497 if (color_depth == 2)
1498 color_table = ff_qt_default_palette_4;
1499 else if (color_depth == 4)
1500 color_table = ff_qt_default_palette_16;
1501 else
1502 color_table = ff_qt_default_palette_256;
1503
1504 for (j = 0; j < color_count; j++) {
1505 r = color_table[j * 3 + 0];
1506 g = color_table[j * 3 + 1];
1507 b = color_table[j * 3 + 2];
1508 sc->palette[j] = (r << 16) | (g << 8) | (b);
1509 }
1510 } else {
1511 /* load the palette from the file */
1512 color_start = avio_rb32(pb);
1513 color_count = avio_rb16(pb);
1514 color_end = avio_rb16(pb);
1515 if ((color_start <= 255) && (color_end <= 255)) {
1516 for (j = color_start; j <= color_end; j++) {
1517 /* each R, G, or B component is 16 bits;
1518 * only use the top 8 bits; skip alpha bytes
1519 * up front */
1520 avio_r8(pb);
1521 avio_r8(pb);
1522 r = avio_r8(pb);
1523 avio_r8(pb);
1524 g = avio_r8(pb);
1525 avio_r8(pb);
1526 b = avio_r8(pb);
1527 avio_r8(pb);
1528 sc->palette[j] = (r << 16) | (g << 8) | (b);
1529 }
1530 }
1531 }
1532 sc->has_palette = 1;
1533 }
1534 }
1535
1536 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1537 AVStream *st, MOVStreamContext *sc)
1538 {
1539 int bits_per_sample, flags;
1540 uint16_t version = avio_rb16(pb);
1541
1542 avio_rb16(pb); /* revision level */
1543 avio_rb32(pb); /* vendor */
1544
1545 st->codecpar->channels = avio_rb16(pb); /* channel count */
1546 st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1547 av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1548
1549 sc->audio_cid = avio_rb16(pb);
1550 avio_rb16(pb); /* packet size = 0 */
1551
1552 st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1553
1554 // Read QT version 1 fields. In version 0 these do not exist.
1555 av_log(c->fc, AV_LOG_TRACE, "version =%"PRIu16", isom =%d\n", version, c->isom);
1556 if (!c->isom) {
1557 if (version == 1) {
1558 sc->samples_per_frame = avio_rb32(pb);
1559 avio_rb32(pb); /* bytes per packet */
1560 sc->bytes_per_frame = avio_rb32(pb);
1561 avio_rb32(pb); /* bytes per sample */
1562 } else if (version == 2) {
1563 avio_rb32(pb); /* sizeof struct only */
1564 st->codecpar->sample_rate = av_int2double(avio_rb64(pb));
1565 st->codecpar->channels = avio_rb32(pb);
1566 avio_rb32(pb); /* always 0x7F000000 */
1567 st->codecpar->bits_per_coded_sample = avio_rb32(pb);
1568
1569 flags = avio_rb32(pb); /* lpcm format specific flag */
1570 sc->bytes_per_frame = avio_rb32(pb);
1571 sc->samples_per_frame = avio_rb32(pb);
1572 if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1573 st->codecpar->codec_id =
1574 ff_mov_get_lpcm_codec_id(st->codecpar->bits_per_coded_sample,
1575 flags);
1576 }
1577 if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1578 /* can't correctly handle variable sized packet as audio unit */
1579 switch (st->codecpar->codec_id) {
1580 case AV_CODEC_ID_MP2:
1581 case AV_CODEC_ID_MP3:
1582 st->need_parsing = AVSTREAM_PARSE_FULL;
1583 break;
1584 }
1585 }
1586 }
1587
1588 switch (st->codecpar->codec_id) {
1589 case AV_CODEC_ID_PCM_S8:
1590 case AV_CODEC_ID_PCM_U8:
1591 if (st->codecpar->bits_per_coded_sample == 16)
1592 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
1593 break;
1594 case AV_CODEC_ID_PCM_S16LE:
1595 case AV_CODEC_ID_PCM_S16BE:
1596 if (st->codecpar->bits_per_coded_sample == 8)
1597 st->codecpar->codec_id = AV_CODEC_ID_PCM_S8;
1598 else if (st->codecpar->bits_per_coded_sample == 24)
1599 st->codecpar->codec_id =
1600 st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE ?
1601 AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1602 break;
1603 /* set values for old format before stsd version 1 appeared */
1604 case AV_CODEC_ID_MACE3:
1605 sc->samples_per_frame = 6;
1606 sc->bytes_per_frame = 2 * st->codecpar->channels;
1607 break;
1608 case AV_CODEC_ID_MACE6:
1609 sc->samples_per_frame = 6;
1610 sc->bytes_per_frame = 1 * st->codecpar->channels;
1611 break;
1612 case AV_CODEC_ID_ADPCM_IMA_QT:
1613 sc->samples_per_frame = 64;
1614 sc->bytes_per_frame = 34 * st->codecpar->channels;
1615 break;
1616 case AV_CODEC_ID_GSM:
1617 sc->samples_per_frame = 160;
1618 sc->bytes_per_frame = 33;
1619 break;
1620 default:
1621 break;
1622 }
1623
1624 bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
1625 if (bits_per_sample) {
1626 st->codecpar->bits_per_coded_sample = bits_per_sample;
1627 sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
1628 }
1629 }
1630
1631 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
1632 AVStream *st, MOVStreamContext *sc,
1633 int64_t size)
1634 {
1635 // ttxt stsd contains display flags, justification, background
1636 // color, fonts, and default styles, so fake an atom to read it
1637 MOVAtom fake_atom = { .size = size };
1638 // mp4s contains a regular esds atom
1639 if (st->codecpar->codec_tag != AV_RL32("mp4s"))
1640 mov_read_glbl(c, pb, fake_atom);
1641 st->codecpar->width = sc->width;
1642 st->codecpar->height = sc->height;
1643 }
1644
1645 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1646 {
1647 uint8_t r, g, b;
1648 int y, cb, cr;
1649
1650 y = (ycbcr >> 16) & 0xFF;
1651 cr = (ycbcr >> 8) & 0xFF;
1652 cb = ycbcr & 0xFF;
1653
1654 b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
1655 g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
1656 r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
1657
1658 return (r << 16) | (g << 8) | b;
1659 }
1660
1661 static int mov_rewrite_dvd_sub_extradata(AVStream *st)
1662 {
1663 char buf[256] = {0};
1664 uint8_t *src = st->codecpar->extradata;
1665 int i;
1666
1667 if (st->codecpar->extradata_size != 64)
1668 return 0;
1669
1670 if (st->codecpar->width > 0 && st->codecpar->height > 0)
1671 snprintf(buf, sizeof(buf), "size: %dx%d\n",
1672 st->codecpar->width, st->codecpar->height);
1673 av_strlcat(buf, "palette: ", sizeof(buf));
1674
1675 for (i = 0; i < 16; i++) {
1676 uint32_t yuv = AV_RB32(src + i * 4);
1677 uint32_t rgba = yuv_to_rgba(yuv);
1678
1679 av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1680 }
1681
1682 if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1683 return 0;
1684
1685 av_freep(&st->codecpar->extradata);
1686 st->codecpar->extradata_size = 0;
1687 st->codecpar->extradata = av_mallocz(strlen(buf) + AV_INPUT_BUFFER_PADDING_SIZE);
1688 if (!st->codecpar->extradata)
1689 return AVERROR(ENOMEM);
1690 st->codecpar->extradata_size = strlen(buf);
1691 memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
1692
1693 return 0;
1694 }
1695
1696 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
1697 AVStream *st, MOVStreamContext *sc,
1698 int64_t size)
1699 {
1700 int ret;
1701
1702 if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
1703 st->codecpar->extradata_size = size;
1704 st->codecpar->extradata = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
1705 if (!st->codecpar->extradata)
1706 return AVERROR(ENOMEM);
1707 ret = ffio_read_size(pb, st->codecpar->extradata, size);
1708 if (ret < 0)
1709 return ret;
1710 } else {
1711 /* other codec type, just skip (rtp, mp4s ...) */
1712 avio_skip(pb, size);
1713 }
1714 return 0;
1715 }
1716
1717 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
1718 AVStream *st, MOVStreamContext *sc)
1719 {
1720 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1721 !st->codecpar->sample_rate && sc->time_scale > 1)
1722 st->codecpar->sample_rate = sc->time_scale;
1723
1724 /* special codec parameters handling */
1725 switch (st->codecpar->codec_id) {
1726 #if CONFIG_DV_DEMUXER
1727 case AV_CODEC_ID_DVAUDIO:
1728 c->dv_fctx = avformat_alloc_context();
1729 if (!c->dv_fctx) {
1730 av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
1731 return AVERROR(ENOMEM);
1732 }
1733 c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1734 if (!c->dv_demux) {
1735 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1736 return AVERROR(ENOMEM);
1737 }
1738 sc->dv_audio_container = 1;
1739 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
1740 break;
1741 #endif
1742 /* no ifdef since parameters are always those */
1743 case AV_CODEC_ID_QCELP:
1744 st->codecpar->channels = 1;
1745 // force sample rate for qcelp when not stored in mov
1746 if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
1747 st->codecpar->sample_rate = 8000;
1748 break;
1749 case AV_CODEC_ID_AMR_NB:
1750 st->codecpar->channels = 1;
1751 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1752 st->codecpar->sample_rate = 8000;
1753 break;
1754 case AV_CODEC_ID_AMR_WB:
1755 st->codecpar->channels = 1;
1756 st->codecpar->sample_rate = 16000;
1757 break;
1758 case AV_CODEC_ID_MP2:
1759 case AV_CODEC_ID_MP3:
1760 /* force type after stsd for m1a hdlr */
1761 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1762 break;
1763 case AV_CODEC_ID_GSM:
1764 case AV_CODEC_ID_ADPCM_MS:
1765 case AV_CODEC_ID_ADPCM_IMA_WAV:
1766 case AV_CODEC_ID_ILBC:
1767 st->codecpar->block_align = sc->bytes_per_frame;
1768 break;
1769 case AV_CODEC_ID_ALAC:
1770 if (st->codecpar->extradata_size == 36) {
1771 st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
1772 st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
1773 }
1774 break;
1775 case AV_CODEC_ID_VC1:
1776 st->need_parsing = AVSTREAM_PARSE_FULL;
1777 break;
1778 default:
1779 break;
1780 }
1781 return 0;
1782 }
1783
1784 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
1785 int codec_tag, int format,
1786 int64_t size)
1787 {
1788 int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1789
1790 if (codec_tag &&
1791 (codec_tag != format &&
1792 // prores is allowed to have differing data format and codec tag
1793 codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
1794 // so is dv (sigh)
1795 codec_tag != AV_RL32("dvpp") && codec_tag != AV_RL32("dvcp") &&
1796 (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1797 : codec_tag != MKTAG('j','p','e','g')))) {
1798 /* Multiple fourcc, we skip JPEG. This is not correct, we should
1799 * export it as a separate AVStream but this needs a few changes
1800 * in the MOV demuxer, patch welcome. */
1801
1802 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1803 avio_skip(pb, size);
1804 return 1;
1805 }
1806
1807 return 0;
1808 }
1809
1810 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1811 {
1812 AVStream *st;
1813 MOVStreamContext *sc;
1814 int pseudo_stream_id;
1815
1816 if (c->fc->nb_streams < 1)
1817 return 0;
1818 st = c->fc->streams[c->fc->nb_streams-1];
1819 sc = st->priv_data;
1820
1821 for (pseudo_stream_id = 0;
1822 pseudo_stream_id < entries && !pb->eof_reached;
1823 pseudo_stream_id++) {
1824 //Parsing Sample description table
1825 enum AVCodecID id;
1826 int ret, dref_id = 1;
1827 MOVAtom a = { AV_RL32("stsd") };
1828 int64_t start_pos = avio_tell(pb);
1829 int64_t size = avio_rb32(pb); /* size */
1830 uint32_t format = avio_rl32(pb); /* data format */
1831
1832 if (size >= 16) {
1833 avio_rb32(pb); /* reserved */
1834 avio_rb16(pb); /* reserved */
1835 dref_id = avio_rb16(pb);
1836 } else {
1837 av_log(c->fc, AV_LOG_ERROR,
1838 "invalid size %"PRId64" in stsd\n", size);
1839 return AVERROR_INVALIDDATA;
1840 }
1841
1842 if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
1843 size - (avio_tell(pb) - start_pos)))
1844 continue;
1845
1846 sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
1847 sc->dref_id= dref_id;
1848
1849 id = mov_codec_id(st, format);
1850
1851 av_log(c->fc, AV_LOG_TRACE,
1852 "size=%"PRId64" format=0x%08"PRIx32" codec_type=%d\n",
1853 size, format, st->codecpar->codec_type);
1854
1855 if (st->codecpar->codec_type==AVMEDIA_TYPE_VIDEO) {
1856 st->codecpar->codec_id = id;
1857 mov_parse_stsd_video(c, pb, st, sc);
1858 } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
1859 st->codecpar->codec_id = id;
1860 mov_parse_stsd_audio(c, pb, st, sc);
1861 } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
1862 st->codecpar->codec_id = id;
1863 mov_parse_stsd_subtitle(c, pb, st, sc,
1864 size - (avio_tell(pb) - start_pos));
1865 } else {
1866 ret = mov_parse_stsd_data(c, pb, st, sc,
1867 size - (avio_tell(pb) - start_pos));
1868 if (ret < 0)
1869 return ret;
1870 }
1871 /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1872 a.size = size - (avio_tell(pb) - start_pos);
1873 if (a.size > 8) {
1874 if ((ret = mov_read_default(c, pb, a)) < 0)
1875 return ret;
1876 } else if (a.size > 0)
1877 avio_skip(pb, a.size);
1878
1879 if (sc->extradata) {
1880 int extra_size = st->codecpar->extradata_size;
1881
1882 /* Move the current stream extradata to the stream context one. */
1883 sc->extradata_size[pseudo_stream_id] = extra_size;
1884 sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
1885 if (!sc->extradata[pseudo_stream_id])
1886 return AVERROR(ENOMEM);
1887 memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
1888 av_freep(&st->codecpar->extradata);
1889 st->codecpar->extradata_size = 0;
1890 }
1891 }
1892
1893 if (pb->eof_reached)
1894 return AVERROR_EOF;
1895
1896 return mov_finalize_stsd_codec(c, pb, st, sc);
1897 }
1898
1899 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1900 {
1901 AVStream *st;
1902 MOVStreamContext *sc;
1903 int ret, entries;
1904
1905 if (c->fc->nb_streams < 1)
1906 return 0;
1907 st = c->fc->streams[c->fc->nb_streams - 1];
1908 sc = st->priv_data;
1909
1910 avio_r8(pb); /* version */
1911 avio_rb24(pb); /* flags */
1912 entries = avio_rb32(pb);
1913
1914 if (sc->extradata) {
1915 av_log(c->fc, AV_LOG_ERROR,
1916 "Duplicate stsd found in this track.\n");
1917 return AVERROR_INVALIDDATA;
1918 }
1919
1920 /* Prepare space for hosting multiple extradata. */
1921 sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
1922 if (!sc->extradata)
1923 return AVERROR(ENOMEM);
1924
1925 sc->stsd_count = entries;
1926 sc->extradata_size = av_mallocz_array(sc->stsd_count, sizeof(*sc->extradata_size));
1927 if (!sc->extradata_size)
1928 return AVERROR(ENOMEM);
1929
1930 ret = ff_mov_read_stsd_entries(c, pb, sc->stsd_count);
1931 if (ret < 0)
1932 return ret;
1933
1934 /* Restore back the primary extradata. */
1935 av_free(st->codecpar->extradata);
1936 st->codecpar->extradata_size = sc->extradata_size[0];
1937 st->codecpar->extradata = av_mallocz(sc->extradata_size[0] + AV_INPUT_BUFFER_PADDING_SIZE);
1938 if (!st->codecpar->extradata)
1939 return AVERROR(ENOMEM);
1940 memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
1941
1942 return 0;
1943 }
1944
1945 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1946 {
1947 AVStream *st;
1948 MOVStreamContext *sc;
1949 unsigned int i, entries;
1950
1951 if (c->fc->nb_streams < 1)
1952 return 0;
1953 st = c->fc->streams[c->fc->nb_streams-1];
1954 sc = st->priv_data;
1955
1956 avio_r8(pb); /* version */
1957 avio_rb24(pb); /* flags */
1958
1959 entries = avio_rb32(pb);
1960
1961 av_log(c->fc, AV_LOG_TRACE, "track[%u].stsc.entries = %u\n", c->fc->nb_streams - 1, entries);
1962
1963 if (!entries)
1964 return 0;
1965 if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1966 return AVERROR_INVALIDDATA;
1967 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1968 if (!sc->stsc_data)
1969 return AVERROR(ENOMEM);
1970
1971 for (i = 0; i < entries && !pb->eof_reached; i++) {
1972 sc->stsc_data[i].first = avio_rb32(pb);
1973 sc->stsc_data[i].count = avio_rb32(pb);
1974 sc->stsc_data[i].id = avio_rb32(pb);
1975 if (sc->stsc_data[i].id <= 0 || sc->stsc_data[i].id > sc->stsd_count) {
1976 sc->stsc_data[i].id = 1;
1977 if (c->fc->error_recognition & AV_EF_EXPLODE) {
1978 av_log(c->fc, AV_LOG_ERROR, "Invalid stsc index.\n");
1979 return AVERROR_INVALIDDATA;
1980 }
1981 }
1982 }
1983
1984 sc->stsc_count = i;
1985
1986 if (pb->eof_reached)
1987 return AVERROR_EOF;
1988
1989 return 0;
1990 }
1991
1992 static inline int mov_stsc_index_valid(unsigned int index, unsigned int count)
1993 {
1994 return index < count - 1;
1995 }
1996
1997 /* Compute the samples value for the stsc entry at the given index. */
1998 static inline int mov_get_stsc_samples(MOVStreamContext *sc, unsigned int index)
1999 {
2000 int chunk_count;
2001
2002 if (mov_stsc_index_valid(index, sc->stsc_count))
2003 chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2004 else
2005 chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2006
2007 return sc->stsc_data[index].count * chunk_count;
2008 }
2009
2010 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2011 {
2012 AVStream *st;
2013 MOVStreamContext *sc;
2014 unsigned i, entries;
2015
2016 if (c->fc->nb_streams < 1)
2017 return 0;
2018 st = c->fc->streams[c->fc->nb_streams-1];
2019 sc = st->priv_data;
2020
2021 avio_rb32(pb); // version + flags
2022
2023 entries = avio_rb32(pb);
2024 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
2025 return AVERROR_INVALIDDATA;
2026 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
2027 if (!sc->stps_data)
2028 return AVERROR(ENOMEM);
2029
2030 for (i = 0; i < entries && !pb->eof_reached; i++) {
2031 sc->stps_data[i] = avio_rb32(pb);
2032 }
2033
2034 sc->stps_count = i;
2035
2036 if (pb->eof_reached)
2037 return AVERROR_EOF;
2038
2039 return 0;
2040 }
2041
2042 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2043 {
2044 AVStream *st;
2045 MOVStreamContext *sc;
2046 unsigned int i, entries;
2047
2048 if (c->fc->nb_streams < 1)
2049 return 0;
2050 st = c->fc->streams[c->fc->nb_streams-1];
2051 sc = st->priv_data;
2052
2053 avio_r8(pb); /* version */
2054 avio_rb24(pb); /* flags */
2055
2056 entries = avio_rb32(pb);
2057
2058 av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %u\n", entries);
2059
2060 if (!entries)
2061 {
2062 sc->keyframe_absent = 1;
2063 return 0;
2064 }
2065 if (entries >= UINT_MAX / sizeof(int))
2066 return AVERROR_INVALIDDATA;
2067 av_freep(&sc->keyframes);
2068 sc->keyframes = av_malloc(entries * sizeof(int));
2069 if (!sc->keyframes)
2070 return AVERROR(ENOMEM);
2071
2072 for (i = 0; i < entries && !pb->eof_reached; i++) {
2073 sc->keyframes[i] = avio_rb32(pb);
2074 }
2075
2076 sc->keyframe_count = i;
2077
2078 if (pb->eof_reached)
2079 return AVERROR_EOF;
2080
2081 return 0;
2082 }
2083
2084 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2085 {
2086 AVStream *st;
2087 MOVStreamContext *sc;
2088 unsigned int i, entries, sample_size, field_size, num_bytes;
2089 BitstreamContext bc;
2090 unsigned char* buf;
2091 int ret;
2092
2093 if (c->fc->nb_streams < 1)
2094 return 0;
2095 st = c->fc->streams[c->fc->nb_streams-1];
2096 sc = st->priv_data;
2097
2098 avio_r8(pb); /* version */
2099 avio_rb24(pb); /* flags */
2100
2101 if (atom.type == MKTAG('s','t','s','z')) {
2102 sample_size = avio_rb32(pb);
2103 if (!sc->sample_size) /* do not overwrite value computed in stsd */
2104 sc->sample_size = sample_size;
2105 field_size = 32;
2106 } else {
2107 sample_size = 0;
2108 avio_rb24(pb); /* reserved */
2109 field_size = avio_r8(pb);
2110 }
2111 entries = avio_rb32(pb);
2112
2113 av_log(c->fc, AV_LOG_TRACE, "sample_size = %u sample_count = %u\n", sc->sample_size, entries);
2114
2115 sc->sample_count = entries;
2116 if (sample_size)
2117 return 0;
2118
2119 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2120 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %u\n", field_size);
2121 return AVERROR_INVALIDDATA;
2122 }
2123
2124 if (!entries)
2125 return 0;
2126 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
2127 return AVERROR_INVALIDDATA;
2128 sc->sample_sizes = av_malloc(entries * sizeof(int));
2129 if (!sc->sample_sizes)
2130 return AVERROR(ENOMEM);
2131
2132 num_bytes = (entries*field_size+4)>>3;
2133
2134 buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2135 if (!buf) {
2136 av_freep(&sc->sample_sizes);
2137 return AVERROR(ENOMEM);
2138 }
2139
2140 ret = ffio_read_size(pb, buf, num_bytes);
2141 if (ret < 0) {
2142 av_freep(&sc->sample_sizes);
2143 av_free(buf);
2144 return ret;
2145 }
2146
2147 bitstream_init8(&bc, buf, num_bytes);
2148
2149 for (i = 0; i < entries && !pb->eof_reached; i++) {
2150 sc->sample_sizes[i] = bitstream_read(&bc, field_size);
2151 sc->data_size += sc->sample_sizes[i];
2152 }
2153
2154 sc->sample_count = i;
2155
2156 av_free(buf);
2157
2158 if (pb->eof_reached)
2159 return AVERROR_EOF;
2160
2161 return 0;
2162 }
2163
2164 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2165 {
2166 AVStream *st;
2167 MOVStreamContext *sc;
2168 unsigned int i, entries;
2169 int64_t duration=0;
2170 int64_t total_sample_count=0;
2171
2172 if (c->fc->nb_streams < 1)
2173 return 0;
2174 st = c->fc->streams[c->fc->nb_streams-1];
2175 sc = st->priv_data;
2176
2177 avio_r8(pb); /* version */
2178 avio_rb24(pb); /* flags */
2179 entries = avio_rb32(pb);
2180
2181 av_log(c->fc, AV_LOG_TRACE, "track[%u].stts.entries = %u\n",
2182 c->fc->nb_streams-1, entries);
2183
2184 if (!entries)
2185 return 0;
2186 if (entries >= UINT_MAX / sizeof(*sc->stts_data))
2187 return AVERROR(EINVAL);
2188
2189 av_free(sc->stts_data);
2190 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
2191 if (!sc->stts_data)
2192 return AVERROR(ENOMEM);
2193
2194 for (i = 0; i < entries && !pb->eof_reached; i++) {
2195 int sample_duration;
2196 int sample_count;
2197
2198 sample_count=avio_rb32(pb);
2199 sample_duration = avio_rb32(pb);
2200 if (sample_count < 0) {
2201 av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2202 return AVERROR_INVALIDDATA;
2203 }
2204 sc->stts_data[i].count= sample_count;
2205 sc->stts_data[i].duration= sample_duration;
2206
2207 av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2208 sample_count, sample_duration);
2209
2210 duration+=(int64_t)sample_duration*sample_count;
2211 total_sample_count+=sample_count;
2212 }
2213
2214 sc->stts_count = i;
2215
2216 if (pb->eof_reached)
2217 return AVERROR_EOF;
2218
2219 st->nb_frames= total_sample_count;
2220 if (duration)
2221 st->duration= duration;
2222 sc->track_end = duration;
2223 return 0;
2224 }
2225
2226 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2227 {
2228 AVStream *st;
2229 MOVStreamContext *sc;
2230 unsigned int i, entries;
2231
2232 if (c->fc->nb_streams < 1)
2233 return 0;
2234 st = c->fc->streams[c->fc->nb_streams-1];
2235 sc = st->priv_data;
2236
2237 avio_r8(pb); /* version */
2238 avio_rb24(pb); /* flags */
2239 entries = avio_rb32(pb);
2240
2241 av_log(c->fc, AV_LOG_TRACE, "track[%u].ctts.entries = %u\n", c->fc->nb_streams - 1, entries);
2242
2243 av_freep(&sc->ctts_data);
2244
2245 if (!entries)
2246 return 0;
2247 if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2248 return AVERROR_INVALIDDATA;
2249 sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2250 if (!sc->ctts_data)
2251 return AVERROR(ENOMEM);
2252
2253 for (i = 0; i < entries && !pb->eof_reached; i++) {
2254 int count =avio_rb32(pb);
2255 int duration =avio_rb32(pb);
2256
2257 sc->ctts_data[i].count = count;
2258 sc->ctts_data[i].duration= duration;
2259 if (duration < 0)
2260 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2261 }
2262
2263 sc->ctts_count = i;
2264
2265 if (pb->eof_reached)
2266 return AVERROR_EOF;
2267
2268 av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2269
2270 return 0;
2271 }
2272
2273 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2274 {
2275 AVStream *st;
2276 MOVStreamContext *sc;
2277 unsigned int i, entries;
2278 uint8_t version;
2279 uint32_t grouping_type;
2280
2281 if (c->fc->nb_streams < 1)
2282 return 0;
2283 st = c->fc->streams[c->fc->nb_streams-1];
2284 sc = st->priv_data;
2285
2286 version = avio_r8(pb); /* version */
2287 avio_rb24(pb); /* flags */
2288 grouping_type = avio_rl32(pb);
2289 if (grouping_type != MKTAG( 'r','a','p',' '))
2290 return 0; /* only support 'rap ' grouping */
2291 if (version == 1)
2292 avio_rb32(pb); /* grouping_type_parameter */
2293
2294 entries = avio_rb32(pb);
2295 if (!entries)
2296 return 0;
2297 if (entries >= UINT_MAX / sizeof(*sc->rap_group))
2298 return AVERROR_INVALIDDATA;
2299 sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
2300 if (!sc->rap_group)
2301 return AVERROR(ENOMEM);
2302
2303 for (i = 0; i < entries && !pb->eof_reached; i++) {
2304 sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2305 sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2306 }
2307
2308 sc->rap_group_count = i;
2309
2310 return pb->eof_reached ? AVERROR_EOF : 0;
2311 }
2312
2313 static void mov_build_index(MOVContext *mov, AVStream *st)
2314 {
2315 MOVStreamContext *sc = st->priv_data;
2316 int64_t current_offset;
2317 int64_t current_dts = 0;
2318 unsigned int stts_index = 0;
2319 unsigned int stsc_index = 0;
2320 unsigned int stss_index = 0;
2321 unsigned int stps_index = 0;
2322 unsigned int i, j;
2323 uint64_t stream_size = 0;
2324
2325 /* adjust first dts according to edit list */
2326 if (sc->time_offset && mov->time_scale > 0) {
2327 if (sc->time_offset < 0)
2328 sc->time_offset = av_rescale(sc->time_offset, sc->time_scale, mov->time_scale);
2329 current_dts = -sc->time_offset;
2330 }
2331
2332 /* only use old uncompressed audio chunk demuxing when stts specifies it */
2333 if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2334 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2335 unsigned int current_sample = 0;
2336 unsigned int stts_sample = 0;
2337 unsigned int sample_size;
2338 unsigned int distance = 0;
2339 unsigned int rap_group_index = 0;
2340 unsigned int rap_group_sample = 0;
2341 int rap_group_present = sc->rap_group_count && sc->rap_group;
2342 int key_off = (sc->keyframes && sc->keyframes[0] > 0) || (sc->stps_data && sc->stps_data[0] > 0);
2343
2344 current_dts -= sc->dts_shift;
2345
2346 if (!sc->sample_count)
2347 return;
2348 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2349 return;
2350 if (av_reallocp_array(&st->index_entries,
2351 st->nb_index_entries + sc->sample_count,
2352 sizeof(*st->index_entries)) < 0) {
2353 st->nb_index_entries = 0;
2354 return;
2355 }
2356 st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
2357
2358 for (i = 0; i < sc->chunk_count; i++) {
2359 current_offset = sc->chunk_offsets[i];
2360 while (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
2361 i + 1 == sc->stsc_data[stsc_index + 1].first)
2362 stsc_index++;
2363 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2364 int keyframe = 0;
2365 if (current_sample >= sc->sample_count) {
2366 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2367 return;
2368 }
2369
2370 if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2371 keyframe = 1;
2372 if (stss_index + 1 < sc->keyframe_count)
2373 stss_index++;
2374 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2375 keyframe = 1;
2376 if (stps_index + 1 < sc->stps_count)
2377 stps_index++;
2378 }
2379 if (rap_group_present && rap_group_index < sc->rap_group_count) {
2380 if (sc->rap_group[rap_group_index].index > 0)
2381 keyframe = 1;
2382 if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2383 rap_group_sample = 0;
2384 rap_group_index++;
2385 }
2386 }
2387 if (keyframe)
2388 distance = 0;
2389 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
2390 if (sc->pseudo_stream_id == -1 ||
2391 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2392 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2393 e->pos = current_offset;
2394 e->timestamp = current_dts;
2395 e->size = sample_size;
2396 e->min_distance = distance;
2397 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2398 av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
2399 "size %u, distance %u, keyframe %d\n", st->index, current_sample,
2400 current_offset, current_dts, sample_size, distance, keyframe);
2401 }
2402
2403 current_offset += sample_size;
2404 stream_size += sample_size;
2405 current_dts += sc->stts_data[stts_index].duration;
2406 distance++;
2407 stts_sample++;
2408 current_sample++;
2409 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2410 stts_sample = 0;
2411 stts_index++;
2412 }
2413 }
2414 }
2415 if (st->duration > 0)
2416 st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
2417 } else {
2418 unsigned chunk_samples, total = 0;
2419
2420 // compute total chunk count
2421 for (i = 0; i < sc->stsc_count; i++) {
2422 unsigned count, chunk_count;
2423
2424 chunk_samples = sc->stsc_data[i].count;
2425 if (i != sc->stsc_count - 1 &&
2426 sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2427 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2428 return;
2429 }
2430
2431 if (sc->samples_per_frame >= 160) { // gsm
2432 count = chunk_samples / sc->samples_per_frame;
2433 } else if (sc->samples_per_frame > 1) {
2434 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2435 count = (chunk_samples+samples-1) / samples;
2436 } else {
2437 count = (chunk_samples+1023) / 1024;
2438 }
2439
2440 if (mov_stsc_index_valid(i, sc->stsc_count))
2441 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2442 else
2443 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2444 total += chunk_count * count;
2445 }
2446
2447 av_log(mov->fc, AV_LOG_TRACE, "chunk count %u\n", total);
2448 if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2449 return;
2450 if (av_reallocp_array(&st->index_entries,
2451 st->nb_index_entries + total,
2452 sizeof(*st->index_entries)) < 0) {
2453 st->nb_index_entries = 0;
2454 return;
2455 }
2456 st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2457
2458 // populate index
2459 for (i = 0; i < sc->chunk_count; i++) {
2460 current_offset = sc->chunk_offsets[i];
2461 if (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
2462 i + 1 == sc->stsc_data[stsc_index + 1].first)
2463 stsc_index++;
2464 chunk_samples = sc->stsc_data[stsc_index].count;
2465
2466 while (chunk_samples > 0) {
2467 AVIndexEntry *e;
2468 unsigned size, samples;
2469
2470 if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
2471 avpriv_request_sample(mov->fc,
2472 "Zero bytes per frame, but %d samples per frame",
2473 sc->samples_per_frame);
2474 return;
2475 }
2476
2477 if (sc->samples_per_frame >= 160) { // gsm
2478 samples = sc->samples_per_frame;
2479 size = sc->bytes_per_frame;
2480 } else {
2481 if (sc->samples_per_frame > 1) {
2482 samples = FFMIN((1024 / sc->samples_per_frame)*
2483 sc->samples_per_frame, chunk_samples);
2484 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2485 } else {
2486 samples = FFMIN(1024, chunk_samples);
2487 size = samples * sc->sample_size;
2488 }
2489 }
2490
2491 if (st->nb_index_entries >= total) {
2492 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %u\n", total);
2493 return;
2494 }
2495 e = &st->index_entries[st->nb_index_entries++];
2496 e->pos = current_offset;
2497 e->timestamp = current_dts;
2498 e->size = size;
2499 e->min_distance = 0;
2500 e->flags = AVINDEX_KEYFRAME;
2501 av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %u, offset %"PRIx64", dts %"PRId64", "
2502 "size %u, duration %u\n", st->index, i, current_offset, current_dts,
2503 size, samples);
2504
2505 current_offset += size;
2506 current_dts += samples;
2507 chunk_samples -= samples;
2508 }
2509 }
2510 }
2511 }
2512
2513 static int mov_open_dref(AVFormatContext *s, AVIOContext **pb, char *src,
2514 MOVDref *ref)
2515 {
2516 /* try relative path, we do not try the absolute because it can leak information about our
2517 system to an attacker */
2518 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2519 char filename[1024];
2520 char *src_path;
2521 int i, l;
2522
2523 /* find a source dir */
2524 src_path = strrchr(src, '/');
2525 if (src_path)
2526 src_path++;
2527 else
2528 src_path = src;
2529
2530 /* find a next level down to target */
2531 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2532 if (ref->path[l] == '/') {
2533 if (i == ref->nlvl_to - 1)
2534 break;
2535 else
2536 i++;
2537 }
2538
2539 /* compose filename if next level down to target was found */
2540 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2541 memcpy(filename, src, src_path - src);
2542 filename[src_path - src] = 0;
2543
2544 for (i = 1; i < ref->nlvl_from; i++)
2545 av_strlcat(filename, "../", 1024);
2546
2547 av_strlcat(filename, ref->path + l + 1, 1024);
2548
2549 if (!s->io_open(s, pb, filename, AVIO_FLAG_READ, NULL))
2550 return 0;
2551 }
2552 }
2553
2554 return AVERROR(ENOENT);
2555 }
2556
2557 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2558 {
2559 AVStream *st;
2560 MOVStreamContext *sc;
2561 int ret;
2562
2563 st = avformat_new_stream(c->fc, NULL);
2564 if (!st) return AVERROR(ENOMEM);
2565 st->id = c->fc->nb_streams;
2566 sc = av_mallocz(sizeof(MOVStreamContext));
2567 if (!sc) return AVERROR(ENOMEM);
2568
2569 st->priv_data = sc;
2570 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2571 sc->ffindex = st->index;
2572
2573 if ((ret = mov_read_default(c, pb, atom)) < 0)
2574 return ret;
2575
2576 /* sanity checks */
2577 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2578 (!sc->sample_size && !sc->sample_count))) {
2579 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2580 st->index);
2581 return 0;
2582 }
2583
2584 if (sc->time_scale <= 0) {
2585 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
2586 sc->time_scale = c->time_scale;
2587 if (sc->time_scale <= 0)
2588 sc->time_scale = 1;
2589 }
2590
2591 avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2592
2593 mov_build_index(c, st);
2594
2595 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2596 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2597 if (c->enable_drefs) {
2598 if (mov_open_dref(c->fc, &sc->pb, c->fc->filename, dref) < 0)
2599 av_log(c->fc, AV_LOG_ERROR,
2600 "stream %d, error opening alias: path='%s', dir='%s', "
2601 "filename='%s', volume='%s', nlvl_from=%"PRId16", nlvl_to=%"PRId16"\n",
2602 st->index, dref->path, dref->dir, dref->filename,
2603 dref->volume, dref->nlvl_from, dref->nlvl_to);
2604 } else {
2605 av_log(c->fc, AV_LOG_WARNING,
2606 "Skipped opening external track: "
2607 "stream %d, alias: path='%s', dir='%s', "
2608 "filename='%s', volume='%s', nlvl_from=%"PRId16", nlvl_to=%"PRId16"."
2609 "Set enable_drefs to allow this.\n",
2610 st->index, dref->path, dref->dir, dref->filename,
2611 dref->volume, dref->nlvl_from, dref->nlvl_to);
2612 }
2613 } else
2614 sc->pb = c->fc->pb;
2615
2616 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2617 if (!st->sample_aspect_ratio.num &&
2618 (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
2619 st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
2620 ((double)st->codecpar->width * sc->height), INT_MAX);
2621 }
2622 }
2623
2624 // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2625 if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
2626 TAG_IS_AVCI(st->codecpar->codec_tag)) {
2627 ret = ff_generate_avci_extradata(st);
2628 if (ret < 0)
2629 return ret;
2630 }
2631
2632 switch (st->codecpar->codec_id) {
2633 #if CONFIG_H261_DECODER
2634 case AV_CODEC_ID_H261:
2635 #endif
2636 #if CONFIG_H263_DECODER
2637 case AV_CODEC_ID_H263:
2638 #endif
2639 #if CONFIG_MPEG4_DECODER
2640 case AV_CODEC_ID_MPEG4:
2641 #endif
2642 st->codecpar->width = 0; /* let decoder init width/height */
2643 st->codecpar->height= 0;
2644 break;
2645 case AV_CODEC_ID_MP3:
2646 st->need_parsing = AVSTREAM_PARSE_FULL;
2647 break;
2648 }
2649
2650 /* Do not need those anymore. */
2651 av_freep(&sc->chunk_offsets);
2652 av_freep(&sc->sample_sizes);
2653 av_freep(&sc->keyframes);
2654 av_freep(&sc->stts_data);
2655 av_freep(&sc->stps_data);
2656 av_freep(&sc->rap_group);
2657
2658 return 0;
2659 }
2660
2661 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2662 {
2663 int ret;
2664 c->itunes_metadata = 1;
2665 ret = mov_read_default(c, pb, atom);
2666 c->itunes_metadata = 0;
2667 return ret;
2668 }
2669
2670 static int mov_read_replaygain(MOVContext *c, AVIOContext *pb, int64_t size)
2671 {
2672 int64_t end = avio_tell(pb) + size;
2673 uint8_t *key = NULL, *val = NULL;
2674 int i;
2675
2676 for (i = 0; i < 2; i++) {
2677 uint8_t **p;
2678 uint32_t len, tag;
2679 int ret;
2680
2681 if (end - avio_tell(pb) <= 12)
2682 break;
2683
2684 len = avio_rb32(pb);
2685 tag = avio_rl32(pb);
2686 avio_skip(pb, 4); // flags
2687
2688 if (len < 12 || len - 12 > end - avio_tell(pb))
2689 break;
2690 len -= 12;
2691
2692 if (tag == MKTAG('n', 'a', 'm', 'e'))
2693 p = &key;
2694 else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
2695 avio_skip(pb, 4);
2696 len -= 4;
2697 p = &val;
2698 } else
2699 break;
2700
2701 *p = av_malloc(len + 1);
2702 if (!*p)
2703 break;
2704 ret = ffio_read_size(pb, *p, len);
2705 if (ret < 0) {
2706 av_freep(p);
2707 return ret;
2708 }
2709 (*p)[len] = 0;
2710 }
2711
2712 if (key && val) {
2713 av_dict_set(&c->fc->metadata, key, val,
2714 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
2715 key = val = NULL;
2716 }
2717
2718 avio_seek(pb, end, SEEK_SET);
2719 av_freep(&key);
2720 av_freep(&val);
2721 return 0;
2722 }
2723
2724 static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2725 {
2726 int64_t end = avio_tell(pb) + atom.size;
2727 uint32_t tag, len;
2728
2729 if (atom.size < 8)
2730 goto fail;
2731
2732 len = avio_rb32(pb);
2733 tag = avio_rl32(pb);
2734
2735 if (len > atom.size)
2736 goto fail;
2737
2738 if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
2739 uint8_t domain[128];
2740 int domain_len;
2741
2742 avio_skip(pb, 4); // flags
2743 len -= 12;
2744
2745 domain_len = avio_get_str(pb, len, domain, sizeof(domain));
2746 avio_skip(pb, len - domain_len);
2747 if (!strcmp(domain, "org.hydrogenaudio.replaygain"))
2748 return mov_read_replaygain(c, pb, end - avio_tell(pb));
2749 }
2750
2751 fail:
2752 av_log(c->fc, AV_LOG_VERBOSE,
2753 "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
2754 return 0;
2755 }
2756
2757 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2758 {
2759 while (atom.size > 8) {
2760 uint32_t tag = avio_rl32(pb);
2761 atom.size -= 4;
2762 if (tag == MKTAG('h','d','l','r')) {
2763 avio_seek(pb, -8, SEEK_CUR);
2764 atom.size += 8;
2765 return mov_read_default(c, pb, atom);
2766 }
2767 }
2768 return 0;
2769 }
2770
2771 // return 1 when matrix is identity, 0 otherwise
2772 #define IS_MATRIX_IDENT(matrix) \
2773 ( (matrix)[0][0] == (1 << 16) && \
2774 (matrix)[1][1] == (1 << 16) && \
2775 (matrix)[2][2] == (1 << 30) && \
2776 !(matrix)[0][1] && !(matrix)[0][2] && \
2777 !(matrix)[1][0] && !(matrix)[1][2] && \
2778 !(matrix)[2][0] && !(matrix)[2][1])
2779
2780 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2781 {
2782 int i, j, e;
2783 int width;
2784 int height;
2785 int64_t disp_transform[2];
2786 int display_matrix[3][3];
2787 int res_display_matrix[3][3] = { { 0 } };
2788 AVStream *st;
2789 MOVStreamContext *sc;
2790 int version;
2791 int flags;
2792
2793 if (c->fc->nb_streams < 1)
2794 return 0;
2795 st = c->fc->streams[c->fc->nb_streams-1];
2796 sc = st->priv_data;
2797
2798 version = avio_r8(pb);
2799 flags = avio_rb24(pb);
2800 st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
2801
2802 if (version == 1) {
2803 avio_rb64(pb);
2804 avio_rb64(pb);
2805 } else {
2806 avio_rb32(pb); /* creation time */
2807 avio_rb32(pb); /* modification time */
2808 }
2809 st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2810 avio_rb32(pb); /* reserved */
2811
2812 /* highlevel (considering edits) duration in movie timebase */
2813 (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2814 avio_rb32(pb); /* reserved */
2815 avio_rb32(pb); /* reserved */
2816
2817 avio_rb16(pb); /* layer */
2818 avio_rb16(pb); /* alternate group */
2819 avio_rb16(pb); /* volume */
2820 avio_rb16(pb); /* reserved */
2821
2822 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2823 // they're kept in fixed point format through all calculations
2824 // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
2825 // side data, but the scale factor is not needed to calculate aspect ratio
2826 for (i = 0; i < 3; i++) {
2827 display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2828 display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2829 display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
2830 }
2831
2832 width = avio_rb32(pb); // 16.16 fixed point track width
2833 height = avio_rb32(pb); // 16.16 fixed point track height
2834 sc->width = width >> 16;
2835 sc->height = height >> 16;
2836
2837 // apply the moov display matrix (after the tkhd one)
2838 for (i = 0; i < 3; i++) {
2839 const int sh[3] = { 16, 16, 30 };
2840 for (j = 0; j < 3; j++) {
2841 for (e = 0; e < 3; e++) {
2842 res_display_matrix[i][j] +=
2843 ((int64_t) display_matrix[i][e] *
2844 c->movie_display_matrix[e][j]) >> sh[e];
2845 }
2846 }
2847 }
2848
2849 // save the matrix when it is not the default identity
2850 if (!IS_MATRIX_IDENT(res_display_matrix)) {
2851 av_freep(&sc->display_matrix);
2852 sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
2853 if (!sc->display_matrix)
2854 return AVERROR(ENOMEM);
2855
2856 for (i = 0; i < 3; i++)
2857 for (j = 0; j < 3; j++)
2858 sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
2859 }
2860
2861 // transform the display width/height according to the matrix
2862 // skip this when the display matrix is the identity one
2863 // to keep the same scale, use [width height 1<<16]
2864 if (width && height && sc->display_matrix) {
2865 for (i = 0; i < 2; i++)
2866 disp_transform[i] =
2867 (int64_t) width * sc->display_matrix[0 + i] +
2868 (int64_t) height * sc->display_matrix[3 + i] +
2869 ((int64_t) sc->display_matrix[6 + i] << 16);
2870
2871 //sample aspect ratio is new width/height divided by old width/height
2872 if (disp_transform[0] > 0 && disp_transform[1] > 0)
2873 st->sample_aspect_ratio = av_d2q(
2874 ((double) disp_transform[0] * height) /
2875 ((double) disp_transform[1] * width), INT_MAX);
2876 }
2877 return 0;
2878 }
2879
2880 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2881 {
2882 MOVFragment *frag = &c->fragment;
2883 MOVTrackExt *trex = NULL;
2884 int flags, track_id, i;
2885
2886 avio_r8(pb); /* version */
2887 flags = avio_rb24(pb);
2888
2889 track_id = avio_rb32(pb);
2890 if (!track_id)
2891 return AVERROR_INVALIDDATA;
2892 frag->track_id = track_id;
2893 for (i = 0; i < c->trex_count; i++)
2894 if (c->trex_data[i].track_id == frag->track_id) {
2895 trex = &c->trex_data[i];
2896 break;
2897 }
2898 if (!trex) {
2899 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2900 return AVERROR_INVALIDDATA;
2901 }
2902
2903 frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
2904 avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
2905 frag->moof_offset : frag->implicit_offset;
2906 frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2907
2908 frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2909 avio_rb32(pb) : trex->duration;
2910 frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2911 avio_rb32(pb) : trex->size;
2912 frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2913 avio_rb32(pb) : trex->flags;
2914 av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
2915 return 0;
2916 }
2917
2918 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2919 {
2920 c->chapter_track = avio_rb32(pb);
2921 return 0;
2922 }
2923
2924 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2925 {
2926 MOVTrackExt *trex;
2927 int err;
2928
2929 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2930 return AVERROR_INVALIDDATA;
2931 if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2932 sizeof(*c->trex_data))) < 0) {
2933 c->trex_count = 0;
2934 return err;
2935 }
2936 trex = &c->trex_data[c->trex_count++];
2937 avio_r8(pb); /* version */
2938 avio_rb24(pb); /* flags */
2939 trex->track_id = avio_rb32(pb);
2940 trex->stsd_id = avio_rb32(pb);
2941 trex->duration = avio_rb32(pb);
2942 trex->size = avio_rb32(pb);
2943 trex->flags = avio_rb32(pb);
2944 return 0;
2945 }
2946
2947 static int mov_read_tfdt(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2948 {
2949 MOVFragment *frag = &c->fragment;
2950 AVStream *st = NULL;
2951 MOVStreamContext *sc;
2952 int version, i;
2953
2954 for (i = 0; i < c->fc->nb_streams; i++) {
2955 if (c->fc->streams[i]->id == frag->track_id) {
2956 st = c->fc->streams[i];
2957 break;
2958 }
2959 }
2960 if (!st) {
2961 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
2962 return AVERROR_INVALIDDATA;
2963 }
2964 sc = st->priv_data;
2965 if (sc