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mov.c
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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 FFmpeg.
10  *
11  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 //#define MOV_EXPORT_ALL_METADATA
31 
32 #include "libavutil/attributes.h"
34 #include "libavutil/display.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/intfloat.h"
37 #include "libavutil/mathematics.h"
39 #include "libavutil/avstring.h"
40 #include "libavutil/dict.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/timecode.h"
43 #include "libavcodec/ac3tab.h"
44 #include "avformat.h"
45 #include "internal.h"
46 #include "avio_internal.h"
47 #include "riff.h"
48 #include "isom.h"
49 #include "libavcodec/get_bits.h"
50 #include "id3v1.h"
51 #include "mov_chan.h"
52 #include "replaygain.h"
53 
54 #if CONFIG_ZLIB
55 #include <zlib.h>
56 #endif
57 
58 #include "qtpalette.h"
59 
60 
61 #undef NDEBUG
62 #include <assert.h>
63 
64 /* those functions parse an atom */
65 /* links atom IDs to parse functions */
66 typedef struct MOVParseTableEntry {
67  uint32_t type;
68  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
70 
71 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
72 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
73 
75  unsigned len, const char *key)
76 {
77  char buf[16];
78 
79  short current, total = 0;
80  avio_rb16(pb); // unknown
81  current = avio_rb16(pb);
82  if (len >= 6)
83  total = avio_rb16(pb);
84  if (!total)
85  snprintf(buf, sizeof(buf), "%d", current);
86  else
87  snprintf(buf, sizeof(buf), "%d/%d", current, total);
89  av_dict_set(&c->fc->metadata, key, buf, 0);
90 
91  return 0;
92 }
93 
95  unsigned len, const char *key)
96 {
97  /* bypass padding bytes */
98  avio_r8(pb);
99  avio_r8(pb);
100  avio_r8(pb);
101 
103  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
104 
105  return 0;
106 }
107 
109  unsigned len, const char *key)
110 {
112  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
113 
114  return 0;
115 }
116 
118  unsigned len, const char *key)
119 {
120  short genre;
121 
122  avio_r8(pb); // unknown
123 
124  genre = avio_r8(pb);
125  if (genre < 1 || genre > ID3v1_GENRE_MAX)
126  return 0;
128  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
129 
130  return 0;
131 }
132 
133 static const uint32_t mac_to_unicode[128] = {
134  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
135  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
136  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
137  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
138  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
139  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
140  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
141  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
142  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
143  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
144  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
145  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
146  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
147  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
148  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
149  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
150 };
151 
153  char *dst, int dstlen)
154 {
155  char *p = dst;
156  char *end = dst+dstlen-1;
157  int i;
158 
159  for (i = 0; i < len; i++) {
160  uint8_t t, c = avio_r8(pb);
161  if (c < 0x80 && p < end)
162  *p++ = c;
163  else if (p < end)
164  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
165  }
166  *p = 0;
167  return p - dst;
168 }
169 
170 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
171 {
172  AVPacket pkt;
173  AVStream *st;
174  MOVStreamContext *sc;
175  enum AVCodecID id;
176  int ret;
177 
178  switch (type) {
179  case 0xd: id = AV_CODEC_ID_MJPEG; break;
180  case 0xe: id = AV_CODEC_ID_PNG; break;
181  case 0x1b: id = AV_CODEC_ID_BMP; break;
182  default:
183  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
184  avio_skip(pb, len);
185  return 0;
186  }
187 
188  st = avformat_new_stream(c->fc, NULL);
189  if (!st)
190  return AVERROR(ENOMEM);
191  sc = av_mallocz(sizeof(*sc));
192  if (!sc)
193  return AVERROR(ENOMEM);
194  st->priv_data = sc;
195 
196  ret = av_get_packet(pb, &pkt, len);
197  if (ret < 0)
198  return ret;
199 
201 
202  st->attached_pic = pkt;
203  st->attached_pic.stream_index = st->index;
205 
207  st->codec->codec_id = id;
208 
209  return 0;
210 }
211 
213  unsigned len, const char *key)
214 {
215  char *value = av_malloc(len + 1);
216  if (!value)
217  return AVERROR(ENOMEM);
218  avio_read(pb, value, len);
219  value[len] = 0;
220  return av_dict_set(&c->fc->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
221 }
222 
223 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
224 {
225  char language[4] = { 0 };
226  char buf[100];
227  uint16_t langcode = 0;
228  double longitude, latitude;
229  const char *key = "location";
230 
231  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4)
232  return AVERROR_INVALIDDATA;
233 
234  avio_skip(pb, 4); // version+flags
235  langcode = avio_rb16(pb);
236  ff_mov_lang_to_iso639(langcode, language);
237  len -= 6;
238 
239  len -= avio_get_str(pb, len, buf, sizeof(buf)); // place name
240  if (len < 1)
241  return AVERROR_INVALIDDATA;
242  avio_skip(pb, 1); // role
243  len -= 1;
244 
245  if (len < 14)
246  return AVERROR_INVALIDDATA;
247  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
248  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
249 
250  // Try to output in the same format as the ?xyz field
251  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f/", latitude, longitude);
252  if (*language && strcmp(language, "und")) {
253  char key2[16];
254  snprintf(key2, sizeof(key2), "%s-%s", key, language);
255  av_dict_set(&c->fc->metadata, key2, buf, 0);
256  }
258  return av_dict_set(&c->fc->metadata, key, buf, 0);
259 }
260 
262 {
263 #ifdef MOV_EXPORT_ALL_METADATA
264  char tmp_key[5];
265 #endif
266  char key2[16], language[4] = {0};
267  char *str = NULL;
268  const char *key = NULL;
269  uint16_t langcode = 0;
270  uint32_t data_type = 0, str_size, str_size_alloc;
271  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
272 
273  switch (atom.type) {
274  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
275  case MKTAG(0xa9,'a','u','t'):
276  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
277  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
278  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
279  case MKTAG( 'c','p','i','l'): key = "compilation";
281  case MKTAG( 'c','p','r','t'):
282  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
283  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
284  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
285  case MKTAG(0xa9,'c','m','t'):
286  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
287  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
288  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
289  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
290  case MKTAG( 'g','n','r','e'): key = "genre";
291  parse = mov_metadata_gnre; break;
292  case MKTAG(0xa9,'t','o','o'):
293  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
294  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
295  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
296  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
297  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
298  case MKTAG( 'd','e','s','c'): key = "description";break;
299  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
300  case MKTAG( 't','v','s','h'): key = "show"; break;
301  case MKTAG( 't','v','e','n'): key = "episode_id";break;
302  case MKTAG( 't','v','n','n'): key = "network"; break;
303  case MKTAG( 't','r','k','n'): key = "track";
305  case MKTAG( 'd','i','s','k'): key = "disc";
307  case MKTAG( 't','v','e','s'): key = "episode_sort";
309  case MKTAG( 't','v','s','n'): key = "season_number";
311  case MKTAG( 's','t','i','k'): key = "media_type";
313  case MKTAG( 'h','d','v','d'): key = "hd_video";
315  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
317  case MKTAG( '@','P','R','M'):
318  return mov_metadata_raw(c, pb, atom.size, "premiere_version");
319  case MKTAG( '@','P','R','Q'):
320  return mov_metadata_raw(c, pb, atom.size, "quicktime_version");
321  case MKTAG( 'l','o','c','i'):
322  return mov_metadata_loci(c, pb, atom.size);
323  case MKTAG( 'X','M','P','_'):
324  return mov_metadata_raw(c, pb, atom.size, "xmp");
325  }
326 
327  if (c->itunes_metadata && atom.size > 8) {
328  int data_size = avio_rb32(pb);
329  int tag = avio_rl32(pb);
330  if (tag == MKTAG('d','a','t','a')) {
331  data_type = avio_rb32(pb); // type
332  avio_rb32(pb); // unknown
333  str_size = data_size - 16;
334  atom.size -= 16;
335 
336  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
337  int ret = mov_read_covr(c, pb, data_type, str_size);
338  if (ret < 0) {
339  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
340  }
341  return ret;
342  }
343  } else return 0;
344  } else if (atom.size > 4 && key && !c->itunes_metadata) {
345  str_size = avio_rb16(pb); // string length
346  langcode = avio_rb16(pb);
347  ff_mov_lang_to_iso639(langcode, language);
348  atom.size -= 4;
349  } else
350  str_size = atom.size;
351 
352 #ifdef MOV_EXPORT_ALL_METADATA
353  if (!key) {
354  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
355  key = tmp_key;
356  }
357 #endif
358 
359  if (!key)
360  return 0;
361  if (atom.size < 0)
362  return AVERROR_INVALIDDATA;
363 
364  str_size_alloc = str_size << 1; // worst-case requirement for output string in case of utf8 coded input
365  str = av_malloc(str_size_alloc);
366  if (!str)
367  return AVERROR(ENOMEM);
368 
369  if (parse)
370  parse(c, pb, str_size, key);
371  else {
372  if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
373  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
374  } else {
375  int ret = avio_read(pb, str, str_size);
376  if (ret != str_size) {
377  av_freep(&str);
378  return ret < 0 ? ret : AVERROR_INVALIDDATA;
379  }
380  str[str_size] = 0;
381  }
383  av_dict_set(&c->fc->metadata, key, str, 0);
384  if (*language && strcmp(language, "und")) {
385  snprintf(key2, sizeof(key2), "%s-%s", key, language);
386  av_dict_set(&c->fc->metadata, key2, str, 0);
387  }
388  }
389  av_dlog(c->fc, "lang \"%3s\" ", language);
390  av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
391  key, str, (char*)&atom.type, str_size_alloc, atom.size);
392 
393  av_freep(&str);
394 
395  return 0;
396 }
397 
399 {
400  int64_t start;
401  int i, nb_chapters, str_len, version;
402  char str[256+1];
403 
404  if ((atom.size -= 5) < 0)
405  return 0;
406 
407  version = avio_r8(pb);
408  avio_rb24(pb);
409  if (version)
410  avio_rb32(pb); // ???
411  nb_chapters = avio_r8(pb);
412 
413  for (i = 0; i < nb_chapters; i++) {
414  if (atom.size < 9)
415  return 0;
416 
417  start = avio_rb64(pb);
418  str_len = avio_r8(pb);
419 
420  if ((atom.size -= 9+str_len) < 0)
421  return 0;
422 
423  avio_read(pb, str, str_len);
424  str[str_len] = 0;
425  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
426  }
427  return 0;
428 }
429 
430 #define MIN_DATA_ENTRY_BOX_SIZE 12
432 {
433  AVStream *st;
434  MOVStreamContext *sc;
435  int entries, i, j;
436 
437  if (c->fc->nb_streams < 1)
438  return 0;
439  st = c->fc->streams[c->fc->nb_streams-1];
440  sc = st->priv_data;
441 
442  avio_rb32(pb); // version + flags
443  entries = avio_rb32(pb);
444  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
445  entries >= UINT_MAX / sizeof(*sc->drefs))
446  return AVERROR_INVALIDDATA;
447  av_free(sc->drefs);
448  sc->drefs_count = 0;
449  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
450  if (!sc->drefs)
451  return AVERROR(ENOMEM);
452  sc->drefs_count = entries;
453 
454  for (i = 0; i < sc->drefs_count; i++) {
455  MOVDref *dref = &sc->drefs[i];
456  uint32_t size = avio_rb32(pb);
457  int64_t next = avio_tell(pb) + size - 4;
458 
459  if (size < 12)
460  return AVERROR_INVALIDDATA;
461 
462  dref->type = avio_rl32(pb);
463  avio_rb32(pb); // version + flags
464  av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
465 
466  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
467  /* macintosh alias record */
468  uint16_t volume_len, len;
469  int16_t type;
470 
471  avio_skip(pb, 10);
472 
473  volume_len = avio_r8(pb);
474  volume_len = FFMIN(volume_len, 27);
475  avio_read(pb, dref->volume, 27);
476  dref->volume[volume_len] = 0;
477  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
478 
479  avio_skip(pb, 12);
480 
481  len = avio_r8(pb);
482  len = FFMIN(len, 63);
483  avio_read(pb, dref->filename, 63);
484  dref->filename[len] = 0;
485  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
486 
487  avio_skip(pb, 16);
488 
489  /* read next level up_from_alias/down_to_target */
490  dref->nlvl_from = avio_rb16(pb);
491  dref->nlvl_to = avio_rb16(pb);
492  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
493  dref->nlvl_from, dref->nlvl_to);
494 
495  avio_skip(pb, 16);
496 
497  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
498  if(avio_feof(pb))
499  return AVERROR_EOF;
500  type = avio_rb16(pb);
501  len = avio_rb16(pb);
502  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
503  if (len&1)
504  len += 1;
505  if (type == 2) { // absolute path
506  av_free(dref->path);
507  dref->path = av_mallocz(len+1);
508  if (!dref->path)
509  return AVERROR(ENOMEM);
510  avio_read(pb, dref->path, len);
511  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
512  len -= volume_len;
513  memmove(dref->path, dref->path+volume_len, len);
514  dref->path[len] = 0;
515  }
516  for (j = 0; j < len; j++)
517  if (dref->path[j] == ':')
518  dref->path[j] = '/';
519  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
520  } else if (type == 0) { // directory name
521  av_free(dref->dir);
522  dref->dir = av_malloc(len+1);
523  if (!dref->dir)
524  return AVERROR(ENOMEM);
525  if (avio_read(pb, dref->dir, len) != len)
526  return AVERROR_INVALIDDATA;
527  dref->dir[len] = 0;
528  for (j = 0; j < len; j++)
529  if (dref->dir[j] == ':')
530  dref->dir[j] = '/';
531  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
532  } else
533  avio_skip(pb, len);
534  }
535  }
536  avio_seek(pb, next, SEEK_SET);
537  }
538  return 0;
539 }
540 
542 {
543  AVStream *st;
544  uint32_t type;
545  uint32_t av_unused ctype;
546  int title_size;
547  char *title_str;
548 
549  if (c->fc->nb_streams < 1) // meta before first trak
550  return 0;
551 
552  st = c->fc->streams[c->fc->nb_streams-1];
553 
554  avio_r8(pb); /* version */
555  avio_rb24(pb); /* flags */
556 
557  /* component type */
558  ctype = avio_rl32(pb);
559  type = avio_rl32(pb); /* component subtype */
560 
561  av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
562  av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
563 
564  if (type == MKTAG('v','i','d','e'))
566  else if (type == MKTAG('s','o','u','n'))
568  else if (type == MKTAG('m','1','a',' '))
570  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
572 
573  avio_rb32(pb); /* component manufacture */
574  avio_rb32(pb); /* component flags */
575  avio_rb32(pb); /* component flags mask */
576 
577  title_size = atom.size - 24;
578  if (title_size > 0) {
579  title_str = av_malloc(title_size + 1); /* Add null terminator */
580  if (!title_str)
581  return AVERROR(ENOMEM);
582  avio_read(pb, title_str, title_size);
583  title_str[title_size] = 0;
584  if (title_str[0])
585  av_dict_set(&st->metadata, "handler_name", title_str +
586  (!c->isom && title_str[0] == title_size - 1), 0);
587  av_freep(&title_str);
588  }
589 
590  return 0;
591 }
592 
594 {
595  AVStream *st;
596  int tag;
597 
598  if (fc->nb_streams < 1)
599  return 0;
600  st = fc->streams[fc->nb_streams-1];
601 
602  avio_rb32(pb); /* version + flags */
603  ff_mp4_read_descr(fc, pb, &tag);
604  if (tag == MP4ESDescrTag) {
605  ff_mp4_parse_es_descr(pb, NULL);
606  } else
607  avio_rb16(pb); /* ID */
608 
609  ff_mp4_read_descr(fc, pb, &tag);
610  if (tag == MP4DecConfigDescrTag)
611  ff_mp4_read_dec_config_descr(fc, st, pb);
612  return 0;
613 }
614 
616 {
617  return ff_mov_read_esds(c->fc, pb);
618 }
619 
621 {
622  AVStream *st;
623  int ac3info, acmod, lfeon, bsmod;
624 
625  if (c->fc->nb_streams < 1)
626  return 0;
627  st = c->fc->streams[c->fc->nb_streams-1];
628 
629  ac3info = avio_rb24(pb);
630  bsmod = (ac3info >> 14) & 0x7;
631  acmod = (ac3info >> 11) & 0x7;
632  lfeon = (ac3info >> 10) & 0x1;
633  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
635  if (lfeon)
637  st->codec->audio_service_type = bsmod;
638  if (st->codec->channels > 1 && bsmod == 0x7)
640 
641  return 0;
642 }
643 
645 {
646  AVStream *st;
647  int eac3info, acmod, lfeon, bsmod;
648 
649  if (c->fc->nb_streams < 1)
650  return 0;
651  st = c->fc->streams[c->fc->nb_streams-1];
652 
653  /* No need to parse fields for additional independent substreams and its
654  * associated dependent substreams since libavcodec's E-AC-3 decoder
655  * does not support them yet. */
656  avio_rb16(pb); /* data_rate and num_ind_sub */
657  eac3info = avio_rb24(pb);
658  bsmod = (eac3info >> 12) & 0x1f;
659  acmod = (eac3info >> 9) & 0x7;
660  lfeon = (eac3info >> 8) & 0x1;
662  if (lfeon)
665  st->codec->audio_service_type = bsmod;
666  if (st->codec->channels > 1 && bsmod == 0x7)
668 
669  return 0;
670 }
671 
673 {
674  AVStream *st;
675 
676  if (c->fc->nb_streams < 1)
677  return 0;
678  st = c->fc->streams[c->fc->nb_streams-1];
679 
680  if (atom.size < 16)
681  return 0;
682 
683  /* skip version and flags */
684  avio_skip(pb, 4);
685 
686  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
687 
688  return 0;
689 }
690 
692 {
693  AVStream *st;
694  int ret;
695 
696  if (c->fc->nb_streams < 1)
697  return 0;
698  st = c->fc->streams[c->fc->nb_streams-1];
699 
700  if ((ret = ff_get_wav_header(pb, st->codec, atom.size)) < 0)
701  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
702 
703  return ret;
704 }
705 
707 {
708  const int num = avio_rb32(pb);
709  const int den = avio_rb32(pb);
710  AVStream *st;
711 
712  if (c->fc->nb_streams < 1)
713  return 0;
714  st = c->fc->streams[c->fc->nb_streams-1];
715 
716  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
717  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
719  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
721  num, den);
722  } else if (den != 0) {
723  st->sample_aspect_ratio.num = num;
724  st->sample_aspect_ratio.den = den;
725  }
726  return 0;
727 }
728 
729 /* this atom contains actual media data */
731 {
732  if (atom.size == 0) /* wrong one (MP4) */
733  return 0;
734  c->found_mdat=1;
735  return 0; /* now go for moov */
736 }
737 
738 /* read major brand, minor version and compatible brands and store them as metadata */
740 {
741  uint32_t minor_ver;
742  int comp_brand_size;
743  char* comp_brands_str;
744  uint8_t type[5] = {0};
745 
746  avio_read(pb, type, 4);
747  if (strcmp(type, "qt "))
748  c->isom = 1;
749  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
750  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
751  minor_ver = avio_rb32(pb); /* minor version */
752  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
753 
754  comp_brand_size = atom.size - 8;
755  if (comp_brand_size < 0)
756  return AVERROR_INVALIDDATA;
757  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
758  if (!comp_brands_str)
759  return AVERROR(ENOMEM);
760  avio_read(pb, comp_brands_str, comp_brand_size);
761  comp_brands_str[comp_brand_size] = 0;
762  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
763  av_freep(&comp_brands_str);
764 
765  return 0;
766 }
767 
768 /* this atom should contain all header atoms */
770 {
771  int ret;
772 
773  if (c->found_moov) {
774  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
775  avio_skip(pb, atom.size);
776  return 0;
777  }
778 
779  if ((ret = mov_read_default(c, pb, atom)) < 0)
780  return ret;
781  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
782  /* so we don't parse the whole file if over a network */
783  c->found_moov=1;
784  return 0; /* now go for mdat */
785 }
786 
788 {
789  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
790  c->has_looked_for_mfra = 1;
791  if (pb->seekable) {
792  int ret;
793  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
794  "for a mfra\n");
795  if ((ret = mov_read_mfra(c, pb)) < 0) {
796  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
797  "read the mfra (may be a live ismv)\n");
798  }
799  } else {
800  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
801  "seekable, can not look for mfra\n");
802  }
803  }
805  av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
806  return mov_read_default(c, pb, atom);
807 }
808 
809 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
810 {
811  char buffer[32];
812  if (time) {
813  struct tm *ptm, tmbuf;
814  time_t timet;
815  if(time >= 2082844800)
816  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
817  timet = time;
818  ptm = gmtime_r(&timet, &tmbuf);
819  if (!ptm) return;
820  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
821  av_dict_set(metadata, "creation_time", buffer, 0);
822  }
823 }
824 
826 {
827  AVStream *st;
828  MOVStreamContext *sc;
829  int version;
830  char language[4] = {0};
831  unsigned lang;
832  int64_t creation_time;
833 
834  if (c->fc->nb_streams < 1)
835  return 0;
836  st = c->fc->streams[c->fc->nb_streams-1];
837  sc = st->priv_data;
838 
839  if (sc->time_scale) {
840  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
841  return AVERROR_INVALIDDATA;
842  }
843 
844  version = avio_r8(pb);
845  if (version > 1) {
846  avpriv_request_sample(c->fc, "Version %d", version);
847  return AVERROR_PATCHWELCOME;
848  }
849  avio_rb24(pb); /* flags */
850  if (version == 1) {
851  creation_time = avio_rb64(pb);
852  avio_rb64(pb);
853  } else {
854  creation_time = avio_rb32(pb);
855  avio_rb32(pb); /* modification time */
856  }
857  mov_metadata_creation_time(&st->metadata, creation_time);
858 
859  sc->time_scale = avio_rb32(pb);
860  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
861 
862  lang = avio_rb16(pb); /* language */
863  if (ff_mov_lang_to_iso639(lang, language))
864  av_dict_set(&st->metadata, "language", language, 0);
865  avio_rb16(pb); /* quality */
866 
867  return 0;
868 }
869 
871 {
872  int64_t creation_time;
873  int version = avio_r8(pb); /* version */
874  avio_rb24(pb); /* flags */
875 
876  if (version == 1) {
877  creation_time = avio_rb64(pb);
878  avio_rb64(pb);
879  } else {
880  creation_time = avio_rb32(pb);
881  avio_rb32(pb); /* modification time */
882  }
883  mov_metadata_creation_time(&c->fc->metadata, creation_time);
884  c->time_scale = avio_rb32(pb); /* time scale */
885 
886  av_dlog(c->fc, "time scale = %i\n", c->time_scale);
887 
888  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
889  // set the AVCodecContext duration because the duration of individual tracks
890  // may be inaccurate
891  if (c->time_scale > 0 && !c->trex_data)
893  avio_rb32(pb); /* preferred scale */
894 
895  avio_rb16(pb); /* preferred volume */
896 
897  avio_skip(pb, 10); /* reserved */
898 
899  avio_skip(pb, 36); /* display matrix */
900 
901  avio_rb32(pb); /* preview time */
902  avio_rb32(pb); /* preview duration */
903  avio_rb32(pb); /* poster time */
904  avio_rb32(pb); /* selection time */
905  avio_rb32(pb); /* selection duration */
906  avio_rb32(pb); /* current time */
907  avio_rb32(pb); /* next track ID */
908  return 0;
909 }
910 
912 {
913  AVStream *st;
914  int little_endian;
915 
916  if (c->fc->nb_streams < 1)
917  return 0;
918  st = c->fc->streams[c->fc->nb_streams-1];
919 
920  little_endian = avio_rb16(pb) & 0xFF;
921  av_dlog(c->fc, "enda %d\n", little_endian);
922  if (little_endian == 1) {
923  switch (st->codec->codec_id) {
926  break;
929  break;
932  break;
935  break;
936  default:
937  break;
938  }
939  }
940  return 0;
941 }
942 
944 {
945  AVStream *st;
946  char color_parameter_type[5] = { 0 };
947  int color_primaries, color_trc, color_matrix;
948 
949  if (c->fc->nb_streams < 1)
950  return 0;
951  st = c->fc->streams[c->fc->nb_streams - 1];
952 
953  avio_read(pb, color_parameter_type, 4);
954  if (strncmp(color_parameter_type, "nclx", 4) &&
955  strncmp(color_parameter_type, "nclc", 4)) {
956  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
957  color_parameter_type);
958  return 0;
959  }
960 
961  color_primaries = avio_rb16(pb);
962  color_trc = avio_rb16(pb);
963  color_matrix = avio_rb16(pb);
964 
965  av_dlog(c->fc, "%s: pri %d trc %d matrix %d",
966  color_parameter_type, color_primaries, color_trc, color_matrix);
967 
968  if (c->isom) {
969  uint8_t color_range = avio_r8(pb) >> 7;
970  av_dlog(c->fc, " full %"PRIu8"", color_range);
971  if (color_range)
973  else
975  /* 14496-12 references JPEG XR specs (rather than the more complete
976  * 23001-8) so some adjusting is required */
977  if (color_primaries >= AVCOL_PRI_FILM)
978  color_primaries = AVCOL_PRI_UNSPECIFIED;
979  if ((color_trc >= AVCOL_TRC_LINEAR &&
980  color_trc <= AVCOL_TRC_LOG_SQRT) ||
981  color_trc >= AVCOL_TRC_BT2020_10)
982  color_trc = AVCOL_TRC_UNSPECIFIED;
983  if (color_matrix >= AVCOL_SPC_BT2020_NCL)
984  color_matrix = AVCOL_SPC_UNSPECIFIED;
986  st->codec->color_trc = color_trc;
987  st->codec->colorspace = color_matrix;
988  } else {
989  /* color primaries, Table 4-4 */
990  switch (color_primaries) {
991  case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
992  case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
993  case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
994  }
995  /* color transfer, Table 4-5 */
996  switch (color_trc) {
997  case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
998  case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
999  }
1000  /* color matrix, Table 4-6 */
1001  switch (color_matrix) {
1002  case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
1003  case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
1004  case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
1005  }
1006  }
1007  av_dlog(c->fc, "\n");
1008 
1009  return 0;
1010 }
1011 
1013 {
1014  AVStream *st;
1015  unsigned mov_field_order;
1016  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1017 
1018  if (c->fc->nb_streams < 1) // will happen with jp2 files
1019  return 0;
1020  st = c->fc->streams[c->fc->nb_streams-1];
1021  if (atom.size < 2)
1022  return AVERROR_INVALIDDATA;
1023  mov_field_order = avio_rb16(pb);
1024  if ((mov_field_order & 0xFF00) == 0x0100)
1025  decoded_field_order = AV_FIELD_PROGRESSIVE;
1026  else if ((mov_field_order & 0xFF00) == 0x0200) {
1027  switch (mov_field_order & 0xFF) {
1028  case 0x01: decoded_field_order = AV_FIELD_TT;
1029  break;
1030  case 0x06: decoded_field_order = AV_FIELD_BB;
1031  break;
1032  case 0x09: decoded_field_order = AV_FIELD_TB;
1033  break;
1034  case 0x0E: decoded_field_order = AV_FIELD_BT;
1035  break;
1036  }
1037  }
1038  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1039  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1040  }
1041  st->codec->field_order = decoded_field_order;
1042 
1043  return 0;
1044 }
1045 
1046 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1048  enum AVCodecID codec_id)
1049 {
1050  AVStream *st;
1051  uint64_t size;
1052  uint8_t *buf;
1053  int err;
1054 
1055  if (c->fc->nb_streams < 1) // will happen with jp2 files
1056  return 0;
1057  st= c->fc->streams[c->fc->nb_streams-1];
1058 
1059  if (st->codec->codec_id != codec_id)
1060  return 0; /* unexpected codec_id - don't mess with extradata */
1061 
1062  size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
1063  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1064  return AVERROR_INVALIDDATA;
1065  if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
1066  st->codec->extradata_size = 0;
1067  return err;
1068  }
1069  buf = st->codec->extradata + st->codec->extradata_size;
1071  AV_WB32( buf , atom.size + 8);
1072  AV_WL32( buf + 4, atom.type);
1073  err = avio_read(pb, buf + 8, atom.size);
1074  if (err < 0) {
1075  return err;
1076  } else if (err < atom.size) {
1077  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1078  st->codec->extradata_size -= atom.size - err;
1079  }
1080  memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1081  return 0;
1082 }
1083 
1084 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1086 {
1087  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1088 }
1089 
1091 {
1092  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1093 }
1094 
1096 {
1097  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1098 }
1099 
1101 {
1102  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1103  if(ret == 0)
1104  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1105  return ret;
1106 }
1107 
1109 {
1110  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1111 
1112  if (!ret && c->fc->nb_streams >= 1) {
1113  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1114  if (avctx->extradata_size >= 40) {
1115  avctx->height = AV_RB16(&avctx->extradata[36]);
1116  avctx->width = AV_RB16(&avctx->extradata[38]);
1117  }
1118  }
1119  return ret;
1120 }
1121 
1123 {
1124  if (c->fc->nb_streams >= 1) {
1125  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1126  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1127  codec->codec_id == AV_CODEC_ID_H264 &&
1128  atom.size > 11) {
1129  avio_skip(pb, 10);
1130  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1131  if (avio_rb16(pb) == 0xd4d)
1132  codec->width = 1440;
1133  return 0;
1134  }
1135  }
1136 
1137  return mov_read_avid(c, pb, atom);
1138 }
1139 
1141 {
1142  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1143 }
1144 
1146 {
1147  AVStream *st;
1148 
1149  if (c->fc->nb_streams < 1)
1150  return 0;
1151  st = c->fc->streams[c->fc->nb_streams-1];
1152 
1153  if ((uint64_t)atom.size > (1<<30))
1154  return AVERROR_INVALIDDATA;
1155 
1156  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1157  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1158  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1159  // pass all frma atom to codec, needed at least for QDMC and QDM2
1160  av_free(st->codec->extradata);
1161  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1162  return AVERROR(ENOMEM);
1163  } else if (atom.size > 8) { /* to read frma, esds atoms */
1164  int ret;
1165  if ((ret = mov_read_default(c, pb, atom)) < 0)
1166  return ret;
1167  } else
1168  avio_skip(pb, atom.size);
1169  return 0;
1170 }
1171 
1172 /**
1173  * This function reads atom content and puts data in extradata without tag
1174  * nor size unlike mov_read_extradata.
1175  */
1177 {
1178  AVStream *st;
1179 
1180  if (c->fc->nb_streams < 1)
1181  return 0;
1182  st = c->fc->streams[c->fc->nb_streams-1];
1183 
1184  if ((uint64_t)atom.size > (1<<30))
1185  return AVERROR_INVALIDDATA;
1186 
1187  if (atom.size >= 10) {
1188  // Broken files created by legacy versions of libavformat will
1189  // wrap a whole fiel atom inside of a glbl atom.
1190  unsigned size = avio_rb32(pb);
1191  unsigned type = avio_rl32(pb);
1192  avio_seek(pb, -8, SEEK_CUR);
1193  if (type == MKTAG('f','i','e','l') && size == atom.size)
1194  return mov_read_default(c, pb, atom);
1195  }
1196  if (st->codec->extradata_size > 1 && st->codec->extradata) {
1197  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1198  return 0;
1199  }
1200  av_free(st->codec->extradata);
1201  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1202  return AVERROR(ENOMEM);
1203 
1204  return 0;
1205 }
1206 
1208 {
1209  AVStream *st;
1210  uint8_t profile_level;
1211  int ret;
1212 
1213  if (c->fc->nb_streams < 1)
1214  return 0;
1215  st = c->fc->streams[c->fc->nb_streams-1];
1216 
1217  if (atom.size >= (1<<28) || atom.size < 7)
1218  return AVERROR_INVALIDDATA;
1219 
1220  profile_level = avio_r8(pb);
1221  if ((profile_level & 0xf0) != 0xc0)
1222  return 0;
1223 
1224  avio_seek(pb, 6, SEEK_CUR);
1225  av_free(st->codec->extradata);
1226  if ((ret = ff_get_extradata(st->codec, pb, atom.size - 7)) < 0)
1227  return ret;
1228 
1229  return 0;
1230 }
1231 
1232 /**
1233  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1234  * but can have extradata appended at the end after the 40 bytes belonging
1235  * to the struct.
1236  */
1238 {
1239  AVStream *st;
1240 
1241  if (c->fc->nb_streams < 1)
1242  return 0;
1243  if (atom.size <= 40)
1244  return 0;
1245  st = c->fc->streams[c->fc->nb_streams-1];
1246 
1247  if ((uint64_t)atom.size > (1<<30))
1248  return AVERROR_INVALIDDATA;
1249 
1250  avio_skip(pb, 40);
1251  av_free(st->codec->extradata);
1252  if (ff_get_extradata(st->codec, pb, atom.size - 40) < 0)
1253  return AVERROR(ENOMEM);
1254  return 0;
1255 }
1256 
1258 {
1259  AVStream *st;
1260  MOVStreamContext *sc;
1261  unsigned int i, entries;
1262 
1263  if (c->fc->nb_streams < 1)
1264  return 0;
1265  st = c->fc->streams[c->fc->nb_streams-1];
1266  sc = st->priv_data;
1267 
1268  avio_r8(pb); /* version */
1269  avio_rb24(pb); /* flags */
1270 
1271  entries = avio_rb32(pb);
1272 
1273  if (!entries)
1274  return 0;
1275  if (entries >= UINT_MAX/sizeof(int64_t))
1276  return AVERROR_INVALIDDATA;
1277 
1278  sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1279  if (!sc->chunk_offsets)
1280  return AVERROR(ENOMEM);
1281  sc->chunk_count = entries;
1282 
1283  if (atom.type == MKTAG('s','t','c','o'))
1284  for (i = 0; i < entries && !pb->eof_reached; i++)
1285  sc->chunk_offsets[i] = avio_rb32(pb);
1286  else if (atom.type == MKTAG('c','o','6','4'))
1287  for (i = 0; i < entries && !pb->eof_reached; i++)
1288  sc->chunk_offsets[i] = avio_rb64(pb);
1289  else
1290  return AVERROR_INVALIDDATA;
1291 
1292  sc->chunk_count = i;
1293 
1294  if (pb->eof_reached)
1295  return AVERROR_EOF;
1296 
1297  return 0;
1298 }
1299 
1300 /**
1301  * Compute codec id for 'lpcm' tag.
1302  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1303  */
1305 {
1306  /* lpcm flags:
1307  * 0x1 = float
1308  * 0x2 = big-endian
1309  * 0x4 = signed
1310  */
1311  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1312 }
1313 
1314 static int mov_codec_id(AVStream *st, uint32_t format)
1315 {
1316  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1317 
1318  if (id <= 0 &&
1319  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1320  (format & 0xFFFF) == 'T' + ('S' << 8)))
1321  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1322 
1323  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1325  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1326  /* skip old asf mpeg4 tag */
1327  format && format != MKTAG('m','p','4','s')) {
1329  if (id <= 0)
1330  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1331  if (id > 0)
1333  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1335  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1337  if (id > 0)
1339  }
1340  }
1341 
1342  st->codec->codec_tag = format;
1343 
1344  return id;
1345 }
1346 
1348  AVStream *st, MOVStreamContext *sc)
1349 {
1350  uint8_t codec_name[32];
1351  unsigned int color_depth, len, j;
1352  int color_greyscale;
1353  int color_table_id;
1354 
1355  avio_rb16(pb); /* version */
1356  avio_rb16(pb); /* revision level */
1357  avio_rb32(pb); /* vendor */
1358  avio_rb32(pb); /* temporal quality */
1359  avio_rb32(pb); /* spatial quality */
1360 
1361  st->codec->width = avio_rb16(pb); /* width */
1362  st->codec->height = avio_rb16(pb); /* height */
1363 
1364  avio_rb32(pb); /* horiz resolution */
1365  avio_rb32(pb); /* vert resolution */
1366  avio_rb32(pb); /* data size, always 0 */
1367  avio_rb16(pb); /* frames per samples */
1368 
1369  len = avio_r8(pb); /* codec name, pascal string */
1370  if (len > 31)
1371  len = 31;
1372  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1373  if (len < 31)
1374  avio_skip(pb, 31 - len);
1375 
1376  if (codec_name[0])
1377  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1378 
1379  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1380  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1381  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1382  st->codec->width &= ~1;
1383  st->codec->height &= ~1;
1384  }
1385  /* Flash Media Server uses tag H263 with Sorenson Spark */
1386  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1387  !memcmp(codec_name, "Sorenson H263", 13))
1389 
1390  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1391  color_table_id = avio_rb16(pb); /* colortable id */
1392  av_dlog(c->fc, "depth %d, ctab id %d\n",
1393  st->codec->bits_per_coded_sample, color_table_id);
1394  /* figure out the palette situation */
1395  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1396  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1397  /* Do not create a greyscale palette for cinepak */
1398  if (color_greyscale && st->codec->codec_id == AV_CODEC_ID_CINEPAK)
1399  return;
1400 
1401  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1402  if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1403  /* for palette traversal */
1404  unsigned int color_start, color_count, color_end;
1405  unsigned char a, r, g, b;
1406 
1407  if (color_greyscale) {
1408  int color_index, color_dec;
1409  /* compute the greyscale palette */
1410  st->codec->bits_per_coded_sample = color_depth;
1411  color_count = 1 << color_depth;
1412  color_index = 255;
1413  color_dec = 256 / (color_count - 1);
1414  for (j = 0; j < color_count; j++) {
1415  r = g = b = color_index;
1416  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1417  color_index -= color_dec;
1418  if (color_index < 0)
1419  color_index = 0;
1420  }
1421  } else if (color_table_id) {
1422  const uint8_t *color_table;
1423  /* if flag bit 3 is set, use the default palette */
1424  color_count = 1 << color_depth;
1425  if (color_depth == 2)
1426  color_table = ff_qt_default_palette_4;
1427  else if (color_depth == 4)
1428  color_table = ff_qt_default_palette_16;
1429  else
1430  color_table = ff_qt_default_palette_256;
1431 
1432  for (j = 0; j < color_count; j++) {
1433  r = color_table[j * 3 + 0];
1434  g = color_table[j * 3 + 1];
1435  b = color_table[j * 3 + 2];
1436  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1437  }
1438  } else {
1439  /* load the palette from the file */
1440  color_start = avio_rb32(pb);
1441  color_count = avio_rb16(pb);
1442  color_end = avio_rb16(pb);
1443  if ((color_start <= 255) && (color_end <= 255)) {
1444  for (j = color_start; j <= color_end; j++) {
1445  /* each A, R, G, or B component is 16 bits;
1446  * only use the top 8 bits */
1447  a = avio_r8(pb);
1448  avio_r8(pb);
1449  r = avio_r8(pb);
1450  avio_r8(pb);
1451  g = avio_r8(pb);
1452  avio_r8(pb);
1453  b = avio_r8(pb);
1454  avio_r8(pb);
1455  sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1456  }
1457  }
1458  }
1459  sc->has_palette = 1;
1460  }
1461 }
1462 
1464  AVStream *st, MOVStreamContext *sc)
1465 {
1466  int bits_per_sample, flags;
1467  uint16_t version = avio_rb16(pb);
1468  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1469 
1470  avio_rb16(pb); /* revision level */
1471  avio_rb32(pb); /* vendor */
1472 
1473  st->codec->channels = avio_rb16(pb); /* channel count */
1474  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1475  av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1476 
1477  sc->audio_cid = avio_rb16(pb);
1478  avio_rb16(pb); /* packet size = 0 */
1479 
1480  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1481 
1482  // Read QT version 1 fields. In version 0 these do not exist.
1483  av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
1484  if (!c->isom ||
1485  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1486 
1487  if (version == 1) {
1488  sc->samples_per_frame = avio_rb32(pb);
1489  avio_rb32(pb); /* bytes per packet */
1490  sc->bytes_per_frame = avio_rb32(pb);
1491  avio_rb32(pb); /* bytes per sample */
1492  } else if (version == 2) {
1493  avio_rb32(pb); /* sizeof struct only */
1495  st->codec->channels = avio_rb32(pb);
1496  avio_rb32(pb); /* always 0x7F000000 */
1498 
1499  flags = avio_rb32(pb); /* lpcm format specific flag */
1500  sc->bytes_per_frame = avio_rb32(pb);
1501  sc->samples_per_frame = avio_rb32(pb);
1502  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1503  st->codec->codec_id =
1505  flags);
1506  }
1507  }
1508 
1509  switch (st->codec->codec_id) {
1510  case AV_CODEC_ID_PCM_S8:
1511  case AV_CODEC_ID_PCM_U8:
1512  if (st->codec->bits_per_coded_sample == 16)
1514  break;
1515  case AV_CODEC_ID_PCM_S16LE:
1516  case AV_CODEC_ID_PCM_S16BE:
1517  if (st->codec->bits_per_coded_sample == 8)
1519  else if (st->codec->bits_per_coded_sample == 24)
1520  st->codec->codec_id =
1523  else if (st->codec->bits_per_coded_sample == 32)
1524  st->codec->codec_id =
1527  break;
1528  /* set values for old format before stsd version 1 appeared */
1529  case AV_CODEC_ID_MACE3:
1530  sc->samples_per_frame = 6;
1531  sc->bytes_per_frame = 2 * st->codec->channels;
1532  break;
1533  case AV_CODEC_ID_MACE6:
1534  sc->samples_per_frame = 6;
1535  sc->bytes_per_frame = 1 * st->codec->channels;
1536  break;
1538  sc->samples_per_frame = 64;
1539  sc->bytes_per_frame = 34 * st->codec->channels;
1540  break;
1541  case AV_CODEC_ID_GSM:
1542  sc->samples_per_frame = 160;
1543  sc->bytes_per_frame = 33;
1544  break;
1545  default:
1546  break;
1547  }
1548 
1549  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1550  if (bits_per_sample) {
1551  st->codec->bits_per_coded_sample = bits_per_sample;
1552  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1553  }
1554 }
1555 
1557  AVStream *st, MOVStreamContext *sc,
1558  int size)
1559 {
1560  // ttxt stsd contains display flags, justification, background
1561  // color, fonts, and default styles, so fake an atom to read it
1562  MOVAtom fake_atom = { .size = size };
1563  // mp4s contains a regular esds atom
1564  if (st->codec->codec_tag != AV_RL32("mp4s"))
1565  mov_read_glbl(c, pb, fake_atom);
1566  st->codec->width = sc->width;
1567  st->codec->height = sc->height;
1568 }
1569 
1570 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1571 {
1572  uint8_t r, g, b;
1573  int y, cb, cr;
1574 
1575  y = (ycbcr >> 16) & 0xFF;
1576  cr = (ycbcr >> 8) & 0xFF;
1577  cb = ycbcr & 0xFF;
1578 
1579  b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
1580  g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
1581  r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
1582 
1583  return (r << 16) | (g << 8) | b;
1584 }
1585 
1587 {
1588  char buf[256] = {0};
1589  uint8_t *src = st->codec->extradata;
1590  int i;
1591 
1592  if (st->codec->extradata_size != 64)
1593  return 0;
1594 
1595  if (st->codec->width > 0 && st->codec->height > 0)
1596  snprintf(buf, sizeof(buf), "size: %dx%d\n",
1597  st->codec->width, st->codec->height);
1598  av_strlcat(buf, "palette: ", sizeof(buf));
1599 
1600  for (i = 0; i < 16; i++) {
1601  uint32_t yuv = AV_RB32(src + i * 4);
1602  uint32_t rgba = yuv_to_rgba(yuv);
1603 
1604  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1605  }
1606 
1607  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1608  return 0;
1609 
1610  av_freep(&st->codec->extradata);
1611  st->codec->extradata_size = 0;
1613  if (!st->codec->extradata)
1614  return AVERROR(ENOMEM);
1615  st->codec->extradata_size = strlen(buf);
1616  memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1617 
1618  return 0;
1619 }
1620 
1622  AVStream *st, MOVStreamContext *sc,
1623  int size)
1624 {
1625  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1626  if (ff_get_extradata(st->codec, pb, size) < 0)
1627  return AVERROR(ENOMEM);
1628  if (size > 16) {
1629  MOVStreamContext *tmcd_ctx = st->priv_data;
1630  int val;
1631  val = AV_RB32(st->codec->extradata + 4);
1632  tmcd_ctx->tmcd_flags = val;
1633  if (val & 1)
1635  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1636  st->codec->time_base.num = 1;
1637  if (size > 30) {
1638  uint32_t len = AV_RB32(st->codec->extradata + 18); /* name atom length */
1639  uint32_t format = AV_RB32(st->codec->extradata + 22);
1640  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
1641  uint16_t str_size = AV_RB16(st->codec->extradata + 26); /* string length */
1642  if (str_size > 0 && size >= (int)str_size + 26) {
1643  char *reel_name = av_malloc(str_size + 1);
1644  if (!reel_name)
1645  return AVERROR(ENOMEM);
1646  memcpy(reel_name, st->codec->extradata + 30, str_size);
1647  reel_name[str_size] = 0; /* Add null terminator */
1648  /* don't add reel_name if emtpy string */
1649  if (*reel_name == 0) {
1650  av_free(reel_name);
1651  } else {
1652  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
1653  }
1654  }
1655  }
1656  }
1657  }
1658  } else {
1659  /* other codec type, just skip (rtp, mp4s ...) */
1660  avio_skip(pb, size);
1661  }
1662  return 0;
1663 }
1664 
1666  AVStream *st, MOVStreamContext *sc)
1667 {
1668  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1669  !st->codec->sample_rate && sc->time_scale > 1)
1670  st->codec->sample_rate = sc->time_scale;
1671 
1672  /* special codec parameters handling */
1673  switch (st->codec->codec_id) {
1674 #if CONFIG_DV_DEMUXER
1675  case AV_CODEC_ID_DVAUDIO:
1678  if (!c->dv_demux) {
1679  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1680  return AVERROR(ENOMEM);
1681  }
1682  sc->dv_audio_container = 1;
1684  break;
1685 #endif
1686  /* no ifdef since parameters are always those */
1687  case AV_CODEC_ID_QCELP:
1688  st->codec->channels = 1;
1689  // force sample rate for qcelp when not stored in mov
1690  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1691  st->codec->sample_rate = 8000;
1692  // FIXME: Why is the following needed for some files?
1693  sc->samples_per_frame = 160;
1694  if (!sc->bytes_per_frame)
1695  sc->bytes_per_frame = 35;
1696  break;
1697  case AV_CODEC_ID_AMR_NB:
1698  st->codec->channels = 1;
1699  /* force sample rate for amr, stsd in 3gp does not store sample rate */
1700  st->codec->sample_rate = 8000;
1701  break;
1702  case AV_CODEC_ID_AMR_WB:
1703  st->codec->channels = 1;
1704  st->codec->sample_rate = 16000;
1705  break;
1706  case AV_CODEC_ID_MP2:
1707  case AV_CODEC_ID_MP3:
1708  /* force type after stsd for m1a hdlr */
1711  break;
1712  case AV_CODEC_ID_GSM:
1713  case AV_CODEC_ID_ADPCM_MS:
1715  case AV_CODEC_ID_ILBC:
1716  case AV_CODEC_ID_MACE3:
1717  case AV_CODEC_ID_MACE6:
1718  case AV_CODEC_ID_QDM2:
1719  st->codec->block_align = sc->bytes_per_frame;
1720  break;
1721  case AV_CODEC_ID_ALAC:
1722  if (st->codec->extradata_size == 36) {
1723  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1724  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1725  }
1726  break;
1727  case AV_CODEC_ID_AC3:
1728  case AV_CODEC_ID_EAC3:
1730  case AV_CODEC_ID_VC1:
1732  break;
1733  default:
1734  break;
1735  }
1736  return 0;
1737 }
1738 
1740  int codec_tag, int format,
1741  int64_t size)
1742 {
1743  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1744 
1745  if (codec_tag &&
1746  (codec_tag != format &&
1747  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1748  : codec_tag != MKTAG('j','p','e','g')))) {
1749  /* Multiple fourcc, we skip JPEG. This is not correct, we should
1750  * export it as a separate AVStream but this needs a few changes
1751  * in the MOV demuxer, patch welcome. */
1752 
1753  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1754  avio_skip(pb, size);
1755  return 1;
1756  }
1757  if ( codec_tag == AV_RL32("avc1") ||
1758  codec_tag == AV_RL32("hvc1") ||
1759  codec_tag == AV_RL32("hev1")
1760  )
1761  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
1762 
1763  return 0;
1764 }
1765 
1767 {
1768  AVStream *st;
1769  MOVStreamContext *sc;
1770  int pseudo_stream_id;
1771 
1772  if (c->fc->nb_streams < 1)
1773  return 0;
1774  st = c->fc->streams[c->fc->nb_streams-1];
1775  sc = st->priv_data;
1776 
1777  for (pseudo_stream_id = 0;
1778  pseudo_stream_id < entries && !pb->eof_reached;
1779  pseudo_stream_id++) {
1780  //Parsing Sample description table
1781  enum AVCodecID id;
1782  int ret, dref_id = 1;
1783  MOVAtom a = { AV_RL32("stsd") };
1784  int64_t start_pos = avio_tell(pb);
1785  int64_t size = avio_rb32(pb); /* size */
1786  uint32_t format = avio_rl32(pb); /* data format */
1787 
1788  if (size >= 16) {
1789  avio_rb32(pb); /* reserved */
1790  avio_rb16(pb); /* reserved */
1791  dref_id = avio_rb16(pb);
1792  }else if (size <= 7){
1793  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1794  return AVERROR_INVALIDDATA;
1795  }
1796 
1797  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1798  size - (avio_tell(pb) - start_pos)))
1799  continue;
1800 
1801  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1802  sc->dref_id= dref_id;
1803 
1804  id = mov_codec_id(st, format);
1805 
1806  av_dlog(c->fc, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1807  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1808  (format >> 24) & 0xff, st->codec->codec_type);
1809 
1810  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1811  st->codec->codec_id = id;
1812  mov_parse_stsd_video(c, pb, st, sc);
1813  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1814  st->codec->codec_id = id;
1815  mov_parse_stsd_audio(c, pb, st, sc);
1816  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1817  st->codec->codec_id = id;
1818  mov_parse_stsd_subtitle(c, pb, st, sc,
1819  size - (avio_tell(pb) - start_pos));
1820  } else {
1821  ret = mov_parse_stsd_data(c, pb, st, sc,
1822  size - (avio_tell(pb) - start_pos));
1823  if (ret < 0)
1824  return ret;
1825  }
1826  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1827  a.size = size - (avio_tell(pb) - start_pos);
1828  if (a.size > 8) {
1829  if ((ret = mov_read_default(c, pb, a)) < 0)
1830  return ret;
1831  } else if (a.size > 0)
1832  avio_skip(pb, a.size);
1833  }
1834 
1835  if (pb->eof_reached)
1836  return AVERROR_EOF;
1837 
1838  return mov_finalize_stsd_codec(c, pb, st, sc);
1839 }
1840 
1842 {
1843  int entries;
1844 
1845  avio_r8(pb); /* version */
1846  avio_rb24(pb); /* flags */
1847  entries = avio_rb32(pb);
1848 
1849  return ff_mov_read_stsd_entries(c, pb, entries);
1850 }
1851 
1853 {
1854  AVStream *st;
1855  MOVStreamContext *sc;
1856  unsigned int i, entries;
1857 
1858  if (c->fc->nb_streams < 1)
1859  return 0;
1860  st = c->fc->streams[c->fc->nb_streams-1];
1861  sc = st->priv_data;
1862 
1863  avio_r8(pb); /* version */
1864  avio_rb24(pb); /* flags */
1865 
1866  entries = avio_rb32(pb);
1867 
1868  av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1869 
1870  if (!entries)
1871  return 0;
1872  if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1873  return AVERROR_INVALIDDATA;
1874  sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1875  if (!sc->stsc_data)
1876  return AVERROR(ENOMEM);
1877 
1878  for (i = 0; i < entries && !pb->eof_reached; i++) {
1879  sc->stsc_data[i].first = avio_rb32(pb);
1880  sc->stsc_data[i].count = avio_rb32(pb);
1881  sc->stsc_data[i].id = avio_rb32(pb);
1882  }
1883 
1884  sc->stsc_count = i;
1885 
1886  if (pb->eof_reached)
1887  return AVERROR_EOF;
1888 
1889  return 0;
1890 }
1891 
1893 {
1894  AVStream *st;
1895  MOVStreamContext *sc;
1896  unsigned i, entries;
1897 
1898  if (c->fc->nb_streams < 1)
1899  return 0;
1900  st = c->fc->streams[c->fc->nb_streams-1];
1901  sc = st->priv_data;
1902 
1903  avio_rb32(pb); // version + flags
1904 
1905  entries = avio_rb32(pb);
1906  if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1907  return AVERROR_INVALIDDATA;
1908  sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1909  if (!sc->stps_data)
1910  return AVERROR(ENOMEM);
1911 
1912  for (i = 0; i < entries && !pb->eof_reached; i++) {
1913  sc->stps_data[i] = avio_rb32(pb);
1914  //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1915  }
1916 
1917  sc->stps_count = i;
1918 
1919  if (pb->eof_reached)
1920  return AVERROR_EOF;
1921 
1922  return 0;
1923 }
1924 
1926 {
1927  AVStream *st;
1928  MOVStreamContext *sc;
1929  unsigned int i, entries;
1930 
1931  if (c->fc->nb_streams < 1)
1932  return 0;
1933  st = c->fc->streams[c->fc->nb_streams-1];
1934  sc = st->priv_data;
1935 
1936  avio_r8(pb); /* version */
1937  avio_rb24(pb); /* flags */
1938 
1939  entries = avio_rb32(pb);
1940 
1941  av_dlog(c->fc, "keyframe_count = %d\n", entries);
1942 
1943  if (!entries)
1944  {
1945  sc->keyframe_absent = 1;
1946  if (!st->need_parsing && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1948  return 0;
1949  }
1950  if (entries >= UINT_MAX / sizeof(int))
1951  return AVERROR_INVALIDDATA;
1952  sc->keyframes = av_malloc(entries * sizeof(int));
1953  if (!sc->keyframes)
1954  return AVERROR(ENOMEM);
1955 
1956  for (i = 0; i < entries && !pb->eof_reached; i++) {
1957  sc->keyframes[i] = avio_rb32(pb);
1958  //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1959  }
1960 
1961  sc->keyframe_count = i;
1962 
1963  if (pb->eof_reached)
1964  return AVERROR_EOF;
1965 
1966  return 0;
1967 }
1968 
1970 {
1971  AVStream *st;
1972  MOVStreamContext *sc;
1973  unsigned int i, entries, sample_size, field_size, num_bytes;
1974  GetBitContext gb;
1975  unsigned char* buf;
1976 
1977  if (c->fc->nb_streams < 1)
1978  return 0;
1979  st = c->fc->streams[c->fc->nb_streams-1];
1980  sc = st->priv_data;
1981 
1982  avio_r8(pb); /* version */
1983  avio_rb24(pb); /* flags */
1984 
1985  if (atom.type == MKTAG('s','t','s','z')) {
1986  sample_size = avio_rb32(pb);
1987  if (!sc->sample_size) /* do not overwrite value computed in stsd */
1988  sc->sample_size = sample_size;
1989  sc->stsz_sample_size = sample_size;
1990  field_size = 32;
1991  } else {
1992  sample_size = 0;
1993  avio_rb24(pb); /* reserved */
1994  field_size = avio_r8(pb);
1995  }
1996  entries = avio_rb32(pb);
1997 
1998  av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1999 
2000  sc->sample_count = entries;
2001  if (sample_size)
2002  return 0;
2003 
2004  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2005  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2006  return AVERROR_INVALIDDATA;
2007  }
2008 
2009  if (!entries)
2010  return 0;
2011  if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
2012  return AVERROR_INVALIDDATA;
2013  sc->sample_sizes = av_malloc(entries * sizeof(int));
2014  if (!sc->sample_sizes)
2015  return AVERROR(ENOMEM);
2016 
2017  num_bytes = (entries*field_size+4)>>3;
2018 
2019  buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
2020  if (!buf) {
2021  av_freep(&sc->sample_sizes);
2022  return AVERROR(ENOMEM);
2023  }
2024 
2025  if (avio_read(pb, buf, num_bytes) < num_bytes) {
2026  av_freep(&sc->sample_sizes);
2027  av_free(buf);
2028  return AVERROR_INVALIDDATA;
2029  }
2030 
2031  init_get_bits(&gb, buf, 8*num_bytes);
2032 
2033  for (i = 0; i < entries && !pb->eof_reached; i++) {
2034  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2035  sc->data_size += sc->sample_sizes[i];
2036  }
2037 
2038  sc->sample_count = i;
2039 
2040  if (pb->eof_reached)
2041  return AVERROR_EOF;
2042 
2043  av_free(buf);
2044  return 0;
2045 }
2046 
2048 {
2049  AVStream *st;
2050  MOVStreamContext *sc;
2051  unsigned int i, entries;
2052  int64_t duration=0;
2053  int64_t total_sample_count=0;
2054 
2055  if (c->fc->nb_streams < 1)
2056  return 0;
2057  st = c->fc->streams[c->fc->nb_streams-1];
2058  sc = st->priv_data;
2059 
2060  avio_r8(pb); /* version */
2061  avio_rb24(pb); /* flags */
2062  entries = avio_rb32(pb);
2063 
2064  av_dlog(c->fc, "track[%i].stts.entries = %i\n",
2065  c->fc->nb_streams-1, entries);
2066 
2067  if (entries >= UINT_MAX / sizeof(*sc->stts_data))
2068  return -1;
2069 
2070  av_free(sc->stts_data);
2071  sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
2072  if (!sc->stts_data)
2073  return AVERROR(ENOMEM);
2074 
2075  for (i = 0; i < entries && !pb->eof_reached; i++) {
2076  int sample_duration;
2077  int sample_count;
2078 
2079  sample_count=avio_rb32(pb);
2080  sample_duration = avio_rb32(pb);
2081 
2082  /* sample_duration < 0 is invalid based on the spec */
2083  if (sample_duration < 0) {
2084  av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta %d in STTS, at %d st:%d\n",
2085  sample_duration, i, c->fc->nb_streams-1);
2086  sample_duration = 1;
2087  }
2088  if (sample_count < 0) {
2089  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2090  return AVERROR_INVALIDDATA;
2091  }
2092  sc->stts_data[i].count= sample_count;
2093  sc->stts_data[i].duration= sample_duration;
2094 
2095  av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
2096  sample_count, sample_duration);
2097 
2098  if ( i+1 == entries
2099  && i
2100  && sample_count == 1
2101  && total_sample_count > 100
2102  && sample_duration/10 > duration / total_sample_count)
2103  sample_duration = duration / total_sample_count;
2104  duration+=(int64_t)sample_duration*sample_count;
2105  total_sample_count+=sample_count;
2106  }
2107 
2108  sc->stts_count = i;
2109 
2110  sc->duration_for_fps += duration;
2111  sc->nb_frames_for_fps += total_sample_count;
2112 
2113  if (pb->eof_reached)
2114  return AVERROR_EOF;
2115 
2116  st->nb_frames= total_sample_count;
2117  if (duration)
2118  st->duration= duration;
2119  sc->track_end = duration;
2120  return 0;
2121 }
2122 
2124 {
2125  if (duration < 0) {
2126  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2127  }
2128 }
2129 
2131 {
2132  AVStream *st;
2133  MOVStreamContext *sc;
2134  unsigned int i, entries;
2135 
2136  if (c->fc->nb_streams < 1)
2137  return 0;
2138  st = c->fc->streams[c->fc->nb_streams-1];
2139  sc = st->priv_data;
2140 
2141  avio_r8(pb); /* version */
2142  avio_rb24(pb); /* flags */
2143  entries = avio_rb32(pb);
2144 
2145  av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2146 
2147  if (!entries)
2148  return 0;
2149  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2150  return AVERROR_INVALIDDATA;
2151  sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
2152  if (!sc->ctts_data)
2153  return AVERROR(ENOMEM);
2154 
2155  for (i = 0; i < entries && !pb->eof_reached; i++) {
2156  int count =avio_rb32(pb);
2157  int duration =avio_rb32(pb);
2158 
2159  sc->ctts_data[i].count = count;
2160  sc->ctts_data[i].duration= duration;
2161 
2162  av_dlog(c->fc, "count=%d, duration=%d\n",
2163  count, duration);
2164 
2165  if (FFABS(duration) > (1<<28) && i+2<entries) {
2166  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2167  av_freep(&sc->ctts_data);
2168  sc->ctts_count = 0;
2169  return 0;
2170  }
2171 
2172  if (i+2<entries)
2173  mov_update_dts_shift(sc, duration);
2174  }
2175 
2176  sc->ctts_count = i;
2177 
2178  if (pb->eof_reached)
2179  return AVERROR_EOF;
2180 
2181  av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
2182 
2183  return 0;
2184 }
2185 
2187 {
2188  AVStream *st;
2189  MOVStreamContext *sc;
2190  unsigned int i, entries;
2191  uint8_t version;
2192  uint32_t grouping_type;
2193 
2194  if (c->fc->nb_streams < 1)
2195  return 0;
2196  st = c->fc->streams[c->fc->nb_streams-1];
2197  sc = st->priv_data;
2198 
2199  version = avio_r8(pb); /* version */
2200  avio_rb24(pb); /* flags */
2201  grouping_type = avio_rl32(pb);
2202  if (grouping_type != MKTAG( 'r','a','p',' '))
2203  return 0; /* only support 'rap ' grouping */
2204  if (version == 1)
2205  avio_rb32(pb); /* grouping_type_parameter */
2206 
2207  entries = avio_rb32(pb);
2208  if (!entries)
2209  return 0;
2210  if (entries >= UINT_MAX / sizeof(*sc->rap_group))
2211  return AVERROR_INVALIDDATA;
2212  sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
2213  if (!sc->rap_group)
2214  return AVERROR(ENOMEM);
2215 
2216  for (i = 0; i < entries && !pb->eof_reached; i++) {
2217  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2218  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2219  }
2220 
2221  sc->rap_group_count = i;
2222 
2223  return pb->eof_reached ? AVERROR_EOF : 0;
2224 }
2225 
2226 static void mov_build_index(MOVContext *mov, AVStream *st)
2227 {
2228  MOVStreamContext *sc = st->priv_data;
2229  int64_t current_offset;
2230  int64_t current_dts = 0;
2231  unsigned int stts_index = 0;
2232  unsigned int stsc_index = 0;
2233  unsigned int stss_index = 0;
2234  unsigned int stps_index = 0;
2235  unsigned int i, j;
2236  uint64_t stream_size = 0;
2237 
2238  /* adjust first dts according to edit list */
2239  if ((sc->empty_duration || sc->start_time) && mov->time_scale > 0) {
2240  if (sc->empty_duration)
2242  sc->time_offset = sc->start_time - sc->empty_duration;
2243  current_dts = -sc->time_offset;
2244  if (sc->ctts_count>0 && sc->stts_count>0 &&
2245  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2246  /* more than 16 frames delay, dts are likely wrong
2247  this happens with files created by iMovie */
2248  sc->wrong_dts = 1;
2249  st->codec->has_b_frames = 1;
2250  }
2251  }
2252 
2253  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2254  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2255  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2256  unsigned int current_sample = 0;
2257  unsigned int stts_sample = 0;
2258  unsigned int sample_size;
2259  unsigned int distance = 0;
2260  unsigned int rap_group_index = 0;
2261  unsigned int rap_group_sample = 0;
2262  int rap_group_present = sc->rap_group_count && sc->rap_group;
2263  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2264 
2265  current_dts -= sc->dts_shift;
2266 
2267  if (!sc->sample_count || st->nb_index_entries)
2268  return;
2269  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2270  return;
2272  st->nb_index_entries + sc->sample_count,
2273  sizeof(*st->index_entries)) < 0) {
2274  st->nb_index_entries = 0;
2275  return;
2276  }
2278 
2279  for (i = 0; i < sc->chunk_count; i++) {
2280  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2281  current_offset = sc->chunk_offsets[i];
2282  while (stsc_index + 1 < sc->stsc_count &&
2283  i + 1 == sc->stsc_data[stsc_index + 1].first)
2284  stsc_index++;
2285 
2286  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2287  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2288  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2289  sc->stsz_sample_size = sc->sample_size;
2290  }
2291  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2292  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2293  sc->stsz_sample_size = sc->sample_size;
2294  }
2295 
2296  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2297  int keyframe = 0;
2298  if (current_sample >= sc->sample_count) {
2299  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2300  return;
2301  }
2302 
2303  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2304  keyframe = 1;
2305  if (stss_index + 1 < sc->keyframe_count)
2306  stss_index++;
2307  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2308  keyframe = 1;
2309  if (stps_index + 1 < sc->stps_count)
2310  stps_index++;
2311  }
2312  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2313  if (sc->rap_group[rap_group_index].index > 0)
2314  keyframe = 1;
2315  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2316  rap_group_sample = 0;
2317  rap_group_index++;
2318  }
2319  }
2320  if (sc->keyframe_absent
2321  && !sc->stps_count
2322  && !rap_group_present
2323  && (st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2324  keyframe = 1;
2325  if (keyframe)
2326  distance = 0;
2327  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2328  if (sc->pseudo_stream_id == -1 ||
2329  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2330  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2331  e->pos = current_offset;
2332  e->timestamp = current_dts;
2333  e->size = sample_size;
2334  e->min_distance = distance;
2335  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2336  av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2337  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2338  current_offset, current_dts, sample_size, distance, keyframe);
2339  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2340  ff_rfps_add_frame(mov->fc, st, current_dts);
2341  }
2342 
2343  current_offset += sample_size;
2344  stream_size += sample_size;
2345  current_dts += sc->stts_data[stts_index].duration;
2346  distance++;
2347  stts_sample++;
2348  current_sample++;
2349  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2350  stts_sample = 0;
2351  stts_index++;
2352  }
2353  }
2354  }
2355  if (st->duration > 0)
2356  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2357  } else {
2358  unsigned chunk_samples, total = 0;
2359 
2360  // compute total chunk count
2361  for (i = 0; i < sc->stsc_count; i++) {
2362  unsigned count, chunk_count;
2363 
2364  chunk_samples = sc->stsc_data[i].count;
2365  if (i != sc->stsc_count - 1 &&
2366  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2367  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2368  return;
2369  }
2370 
2371  if (sc->samples_per_frame >= 160) { // gsm
2372  count = chunk_samples / sc->samples_per_frame;
2373  } else if (sc->samples_per_frame > 1) {
2374  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2375  count = (chunk_samples+samples-1) / samples;
2376  } else {
2377  count = (chunk_samples+1023) / 1024;
2378  }
2379 
2380  if (i < sc->stsc_count - 1)
2381  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2382  else
2383  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2384  total += chunk_count * count;
2385  }
2386 
2387  av_dlog(mov->fc, "chunk count %d\n", total);
2388  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2389  return;
2391  st->nb_index_entries + total,
2392  sizeof(*st->index_entries)) < 0) {
2393  st->nb_index_entries = 0;
2394  return;
2395  }
2396  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2397 
2398  // populate index
2399  for (i = 0; i < sc->chunk_count; i++) {
2400  current_offset = sc->chunk_offsets[i];
2401  if (stsc_index + 1 < sc->stsc_count &&
2402  i + 1 == sc->stsc_data[stsc_index + 1].first)
2403  stsc_index++;
2404  chunk_samples = sc->stsc_data[stsc_index].count;
2405 
2406  while (chunk_samples > 0) {
2407  AVIndexEntry *e;
2408  unsigned size, samples;
2409 
2410  if (sc->samples_per_frame >= 160) { // gsm
2411  samples = sc->samples_per_frame;
2412  size = sc->bytes_per_frame;
2413  } else {
2414  if (sc->samples_per_frame > 1) {
2415  samples = FFMIN((1024 / sc->samples_per_frame)*
2416  sc->samples_per_frame, chunk_samples);
2417  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2418  } else {
2419  samples = FFMIN(1024, chunk_samples);
2420  size = samples * sc->sample_size;
2421  }
2422  }
2423 
2424  if (st->nb_index_entries >= total) {
2425  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2426  return;
2427  }
2428  e = &st->index_entries[st->nb_index_entries++];
2429  e->pos = current_offset;
2430  e->timestamp = current_dts;
2431  e->size = size;
2432  e->min_distance = 0;
2433  e->flags = AVINDEX_KEYFRAME;
2434  av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2435  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2436  size, samples);
2437 
2438  current_offset += size;
2439  current_dts += samples;
2440  chunk_samples -= samples;
2441  }
2442  }
2443  }
2444 }
2445 
2446 static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
2447  AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
2448 {
2449  /* try relative path, we do not try the absolute because it can leak information about our
2450  system to an attacker */
2451  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2452  char filename[1024];
2453  const char *src_path;
2454  int i, l;
2455 
2456  /* find a source dir */
2457  src_path = strrchr(src, '/');
2458  if (src_path)
2459  src_path++;
2460  else
2461  src_path = src;
2462 
2463  /* find a next level down to target */
2464  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2465  if (ref->path[l] == '/') {
2466  if (i == ref->nlvl_to - 1)
2467  break;
2468  else
2469  i++;
2470  }
2471 
2472  /* compose filename if next level down to target was found */
2473  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2474  memcpy(filename, src, src_path - src);
2475  filename[src_path - src] = 0;
2476 
2477  for (i = 1; i < ref->nlvl_from; i++)
2478  av_strlcat(filename, "../", 1024);
2479 
2480  av_strlcat(filename, ref->path + l + 1, 1024);
2481 
2482  if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2483  return 0;
2484  }
2485  } else if (use_absolute_path) {
2486  av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
2487  "this is a possible security issue\n");
2488  if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2489  return 0;
2490  }
2491 
2492  return AVERROR(ENOENT);
2493 }
2494 
2496 {
2497  if (sc->time_scale <= 0) {
2498  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2499  sc->time_scale = c->time_scale;
2500  if (sc->time_scale <= 0)
2501  sc->time_scale = 1;
2502  }
2503 }
2504 
2506 {
2507  AVStream *st;
2508  MOVStreamContext *sc;
2509  int ret;
2510 
2511  st = avformat_new_stream(c->fc, NULL);
2512  if (!st) return AVERROR(ENOMEM);
2513  st->id = c->fc->nb_streams;
2514  sc = av_mallocz(sizeof(MOVStreamContext));
2515  if (!sc) return AVERROR(ENOMEM);
2516 
2517  st->priv_data = sc;
2519  sc->ffindex = st->index;
2520 
2521  if ((ret = mov_read_default(c, pb, atom)) < 0)
2522  return ret;
2523 
2524  /* sanity checks */
2525  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2526  (!sc->sample_size && !sc->sample_count))) {
2527  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2528  st->index);
2529  return 0;
2530  }
2531 
2532  fix_timescale(c, sc);
2533 
2534  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2535 
2536  mov_build_index(c, st);
2537 
2538  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2539  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2540  if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
2541  c->use_absolute_path, c->fc) < 0)
2542  av_log(c->fc, AV_LOG_ERROR,
2543  "stream %d, error opening alias: path='%s', dir='%s', "
2544  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2545  st->index, dref->path, dref->dir, dref->filename,
2546  dref->volume, dref->nlvl_from, dref->nlvl_to);
2547  } else {
2548  sc->pb = c->fc->pb;
2549  sc->pb_is_copied = 1;
2550  }
2551 
2552  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2553  if (!st->sample_aspect_ratio.num &&
2554  (st->codec->width != sc->width || st->codec->height != sc->height)) {
2555  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2556  ((double)st->codec->width * sc->height), INT_MAX);
2557  }
2558 
2559 #if FF_API_R_FRAME_RATE
2560  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2562  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2563 #endif
2564  }
2565 
2566  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2567  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2568  TAG_IS_AVCI(st->codec->codec_tag)) {
2569  ret = ff_generate_avci_extradata(st);
2570  if (ret < 0)
2571  return ret;
2572  }
2573 
2574  switch (st->codec->codec_id) {
2575 #if CONFIG_H261_DECODER
2576  case AV_CODEC_ID_H261:
2577 #endif
2578 #if CONFIG_H263_DECODER
2579  case AV_CODEC_ID_H263:
2580 #endif
2581 #if CONFIG_MPEG4_DECODER
2582  case AV_CODEC_ID_MPEG4:
2583 #endif
2584  st->codec->width = 0; /* let decoder init width/height */
2585  st->codec->height= 0;
2586  break;
2587  }
2588 
2589  /* Do not need those anymore. */
2590  av_freep(&sc->chunk_offsets);
2591  av_freep(&sc->stsc_data);
2592  av_freep(&sc->sample_sizes);
2593  av_freep(&sc->keyframes);
2594  av_freep(&sc->stts_data);
2595  av_freep(&sc->stps_data);
2596  av_freep(&sc->rap_group);
2597 
2598  return 0;
2599 }
2600 
2602 {
2603  int ret;
2604  c->itunes_metadata = 1;
2605  ret = mov_read_default(c, pb, atom);
2606  c->itunes_metadata = 0;
2607  return ret;
2608 }
2609 
2611 {
2612  int64_t end = avio_tell(pb) + size;
2613  uint8_t *key = NULL, *val = NULL;
2614  int i;
2615  AVStream *st;
2616  MOVStreamContext *sc;
2617 
2618  if (c->fc->nb_streams < 1)
2619  return 0;
2620  st = c->fc->streams[c->fc->nb_streams-1];
2621  sc = st->priv_data;
2622 
2623  for (i = 0; i < 2; i++) {
2624  uint8_t **p;
2625  uint32_t len, tag;
2626 
2627  if (end - avio_tell(pb) <= 12)
2628  break;
2629 
2630  len = avio_rb32(pb);
2631  tag = avio_rl32(pb);
2632  avio_skip(pb, 4); // flags
2633 
2634  if (len < 12 || len - 12 > end - avio_tell(pb))
2635  break;
2636  len -= 12;
2637 
2638  if (tag == MKTAG('n', 'a', 'm', 'e'))
2639  p = &key;
2640  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
2641  avio_skip(pb, 4);
2642  len -= 4;
2643  p = &val;
2644  } else
2645  break;
2646 
2647  *p = av_malloc(len + 1);
2648  if (!*p)
2649  break;
2650  avio_read(pb, *p, len);
2651  (*p)[len] = 0;
2652  }
2653 
2654  if (key && val) {
2655  if (strcmp(key, "iTunSMPB") == 0) {
2656  int priming, remainder, samples;
2657  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
2658  if(priming>0 && priming<16384)
2659  sc->start_pad = priming;
2660  }
2661  }
2662  if (strcmp(key, "cdec") != 0) {
2663  av_dict_set(&c->fc->metadata, key, val,
2665  key = val = NULL;
2666  }
2667  }
2668 
2669  avio_seek(pb, end, SEEK_SET);
2670  av_freep(&key);
2671  av_freep(&val);
2672  return 0;
2673 }
2674 
2676 {
2677  int64_t end = avio_tell(pb) + atom.size;
2678  uint32_t tag, len;
2679 
2680  if (atom.size < 8)
2681  goto fail;
2682 
2683  len = avio_rb32(pb);
2684  tag = avio_rl32(pb);
2685 
2686  if (len > atom.size)
2687  goto fail;
2688 
2689  if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
2690  uint8_t domain[128];
2691  int domain_len;
2692 
2693  avio_skip(pb, 4); // flags
2694  len -= 12;
2695 
2696  domain_len = avio_get_str(pb, len, domain, sizeof(domain));
2697  avio_skip(pb, len - domain_len);
2698  return mov_read_custom_2plus(c, pb, end - avio_tell(pb));
2699  }
2700 
2701 fail:
2702  av_log(c->fc, AV_LOG_VERBOSE,
2703  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
2704  return 0;
2705 }
2706 
2708 {
2709  while (atom.size > 8) {
2710  uint32_t tag = avio_rl32(pb);
2711  atom.size -= 4;
2712  if (tag == MKTAG('h','d','l','r')) {
2713  avio_seek(pb, -8, SEEK_CUR);
2714  atom.size += 8;
2715  return mov_read_default(c, pb, atom);
2716  }
2717  }
2718  return 0;
2719 }
2720 
2722 {
2723  int i;
2724  int width;
2725  int height;
2726  int64_t disp_transform[2];
2727  int display_matrix[3][3];
2728  AVStream *st;
2729  MOVStreamContext *sc;
2730  int version;
2731  int flags;
2732 
2733  if (c->fc->nb_streams < 1)
2734  return 0;
2735  st = c->fc->streams[c->fc->nb_streams-1];
2736  sc = st->priv_data;
2737 
2738  version = avio_r8(pb);
2739  flags = avio_rb24(pb);
2741 
2742  if (version == 1) {
2743  avio_rb64(pb);
2744  avio_rb64(pb);
2745  } else {
2746  avio_rb32(pb); /* creation time */
2747  avio_rb32(pb); /* modification time */
2748  }
2749  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2750  avio_rb32(pb); /* reserved */
2751 
2752  /* highlevel (considering edits) duration in movie timebase */
2753  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2754  avio_rb32(pb); /* reserved */
2755  avio_rb32(pb); /* reserved */
2756 
2757  avio_rb16(pb); /* layer */
2758  avio_rb16(pb); /* alternate group */
2759  avio_rb16(pb); /* volume */
2760  avio_rb16(pb); /* reserved */
2761 
2762  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2763  // they're kept in fixed point format through all calculations
2764  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
2765  // side data, but the scale factor is not needed to calculate aspect ratio
2766  for (i = 0; i < 3; i++) {
2767  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2768  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2769  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
2770  }
2771 
2772  width = avio_rb32(pb); // 16.16 fixed point track width
2773  height = avio_rb32(pb); // 16.16 fixed point track height
2774  sc->width = width >> 16;
2775  sc->height = height >> 16;
2776 
2777  // save the matrix and add rotate metadata when it is not the default
2778  // identity
2779  if (display_matrix[0][0] != (1 << 16) ||
2780  display_matrix[1][1] != (1 << 16) ||
2781  display_matrix[2][2] != (1 << 30) ||
2782  display_matrix[0][1] || display_matrix[0][2] ||
2783  display_matrix[1][0] || display_matrix[1][2] ||
2784  display_matrix[2][0] || display_matrix[2][1]) {
2785  int i, j;
2786  double rotate;
2787 
2788  av_freep(&sc->display_matrix);
2789  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
2790  if (!sc->display_matrix)
2791  return AVERROR(ENOMEM);
2792 
2793  for (i = 0; i < 3; i++)
2794  for (j = 0; j < 3; j++)
2795  sc->display_matrix[i * 3 + j] = display_matrix[j][i];
2796 
2798  if (!isnan(rotate)) {
2799  char rotate_buf[64];
2800  rotate = -rotate;
2801  if (rotate < 0) // for backward compatibility
2802  rotate += 360;
2803  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
2804  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
2805  }
2806  }
2807 
2808  // transform the display width/height according to the matrix
2809  // skip this if the display matrix is the default identity matrix
2810  // or if it is rotating the picture, ex iPhone 3GS
2811  // to keep the same scale, use [width height 1<<16]
2812  if (width && height &&
2813  ((display_matrix[0][0] != 65536 ||
2814  display_matrix[1][1] != 65536) &&
2815  !display_matrix[0][1] &&
2816  !display_matrix[1][0] &&
2817  !display_matrix[2][0] && !display_matrix[2][1])) {
2818  for (i = 0; i < 2; i++)
2819  disp_transform[i] =
2820  (int64_t) width * display_matrix[0][i] +
2821  (int64_t) height * display_matrix[1][i] +
2822  ((int64_t) display_matrix[2][i] << 16);
2823 
2824  //sample aspect ratio is new width/height divided by old width/height
2826  ((double) disp_transform[0] * height) /
2827  ((double) disp_transform[1] * width), INT_MAX);
2828  }
2829  return 0;
2830 }
2831 
2833 {
2834  MOVFragment *frag = &c->fragment;
2835  MOVTrackExt *trex = NULL;
2836  MOVFragmentIndex* index = NULL;
2837  int flags, track_id, i;
2838 
2839  avio_r8(pb); /* version */
2840  flags = avio_rb24(pb);
2841 
2842  track_id = avio_rb32(pb);
2843  if (!track_id)
2844  return AVERROR_INVALIDDATA;
2845  frag->track_id = track_id;
2846  for (i = 0; i < c->trex_count; i++)
2847  if (c->trex_data[i].track_id == frag->track_id) {
2848  trex = &c->trex_data[i];
2849  break;
2850  }
2851  if (!trex) {
2852  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2853  return AVERROR_INVALIDDATA;
2854  }
2855  for (i = 0; i < c->fragment_index_count; i++) {
2856  MOVFragmentIndex* candidate = c->fragment_index_data[i];
2857  if (candidate->track_id == frag->track_id) {
2858  av_log(c->fc, AV_LOG_DEBUG,
2859  "found fragment index for track %u\n", frag->track_id);
2860  index = candidate;
2861  break;
2862  }
2863  }
2864 
2867  frag->moof_offset : frag->implicit_offset;
2868  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2869 
2870  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2871  avio_rb32(pb) : trex->duration;
2872  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2873  avio_rb32(pb) : trex->size;
2874  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2875  avio_rb32(pb) : trex->flags;
2876  frag->time = AV_NOPTS_VALUE;
2877  if (index) {
2878  int i, found = 0;
2879  for (i = index->current_item; i < index->item_count; i++) {
2880  if (frag->implicit_offset == index->items[i].moof_offset) {
2881  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
2882  "for track %u and moof_offset %"PRId64"\n",
2883  frag->track_id, index->items[i].moof_offset);
2884  frag->time = index->items[i].time;
2885  index->current_item = i + 1;
2886  found = 1;
2887  }
2888  }
2889  if (!found) {
2890  av_log(c->fc, AV_LOG_WARNING, "track %u has a fragment index "
2891  "but it doesn't have an (in-order) entry for moof_offset "
2892  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
2893  }
2894  }
2895  av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2896  return 0;
2897 }
2898 
2900 {
2901  c->chapter_track = avio_rb32(pb);
2902  return 0;
2903 }
2904 
2906 {
2907  MOVTrackExt *trex;
2908  int err;
2909 
2910  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2911  return AVERROR_INVALIDDATA;
2912  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2913  sizeof(*c->trex_data))) < 0) {
2914  c->trex_count = 0;
2915  return err;
2916  }
2917 
2918  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
2919 
2920  trex = &c->trex_data[c->trex_count++];
2921  avio_r8(pb); /* version */
2922  avio_rb24(pb); /* flags */
2923  trex->track_id = avio_rb32(pb);
2924  trex->stsd_id = avio_rb32(pb);
2925  trex->duration = avio_rb32(pb);
2926  trex->size = avio_rb32(pb);
2927  trex->flags = avio_rb32(pb);
2928  return 0;
2929 }
2930 
2932 {
2933  MOVFragment *frag = &c->fragment;
2934  AVStream *st = NULL;
2935  MOVStreamContext *sc;
2936  int version, i;
2937 
2938  for (i = 0; i < c->fc->nb_streams; i++) {
2939  if (c->fc->streams[i]->id == frag->track_id) {
2940  st = c->fc->streams[i];
2941  break;
2942  }
2943  }
2944  if (!st) {
2945  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2946  return AVERROR_INVALIDDATA;
2947  }
2948  sc = st->priv_data;
2949  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
2950  return 0;
2951  version = avio_r8(pb);
2952  avio_rb24(pb); /* flags */
2953  if (version) {
2954  sc->track_end = avio_rb64(pb);
2955  } else {
2956  sc->track_end = avio_rb32(pb);
2957  }
2958  return 0;
2959 }
2960 
2962 {
2963  MOVFragment *frag = &c->fragment;
2964  AVStream *st = NULL;
2965  MOVStreamContext *sc;
2966  MOVStts *ctts_data;
2967  uint64_t offset;
2968  int64_t dts;
2969  int data_offset = 0;
2970  unsigned entries, first_sample_flags = frag->flags;
2971  int flags, distance, i, found_keyframe = 0, err;
2972 
2973  for (i = 0; i < c->fc->nb_streams; i++) {
2974  if (c->fc->streams[i]->id == frag->track_id) {
2975  st = c->fc->streams[i];
2976  break;
2977  }
2978  }
2979  if (!st) {
2980  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2981  return AVERROR_INVALIDDATA;
2982  }
2983  sc = st->priv_data;
2984  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
2985  return 0;
2986  avio_r8(pb); /* version */
2987  flags = avio_rb24(pb);
2988  entries = avio_rb32(pb);
2989  av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2990 
2991  /* Always assume the presence of composition time offsets.
2992  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2993  * 1) in the initial movie, there are no samples.
2994  * 2) in the first movie fragment, there is only one sample without composition time offset.
2995  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2996  if (!sc->ctts_count && sc->sample_count)
2997  {
2998  /* Complement ctts table if moov atom doesn't have ctts atom. */
2999  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
3000  if (!ctts_data)
3001  return AVERROR(ENOMEM);
3002  sc->ctts_data = ctts_data;
3003  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
3004  sc->ctts_data[sc->ctts_count].duration = 0;
3005  sc->ctts_count++;
3006  }
3007  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
3008  return AVERROR_INVALIDDATA;
3009  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
3010  sizeof(*sc->ctts_data))) < 0) {
3011  sc->ctts_count = 0;
3012  return err;
3013  }
3014  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
3015  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
3016  dts = sc->track_end - sc->time_offset;
3017  offset = frag->base_data_offset + data_offset;
3018  distance = 0;
3019  av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
3020  for (i = 0; i < entries && !pb->eof_reached; i++) {
3021  unsigned sample_size = frag->size;
3022  int sample_flags = i ? frag->flags : first_sample_flags;
3023  unsigned sample_duration = frag->duration;
3024  int keyframe = 0;
3025 
3026  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
3027  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
3028  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
3029  sc->ctts_data[sc->ctts_count].count = 1;
3030  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
3031  avio_rb32(pb) : 0;
3033  if (frag->time != AV_NOPTS_VALUE) {
3034  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
3035  int64_t pts = frag->time;
3036  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3037  " sc->dts_shift %d ctts.duration %d"
3038  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
3039  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
3040  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
3041  dts = pts - sc->dts_shift;
3042  if (flags & MOV_TRUN_SAMPLE_CTS) {
3043  dts -= sc->ctts_data[sc->ctts_count].duration;
3044  } else {
3045  dts -= sc->time_offset;
3046  }
3047  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
3048  } else {
3049  dts = frag->time;
3050  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3051  ", using it for dts\n", dts);
3052  }
3053  frag->time = AV_NOPTS_VALUE;
3054  }
3055  sc->ctts_count++;
3056  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3057  keyframe = 1;
3058  else if (!found_keyframe)
3059  keyframe = found_keyframe =
3060  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
3062  if (keyframe)
3063  distance = 0;
3064  av_add_index_entry(st, offset, dts, sample_size, distance,
3065  keyframe ? AVINDEX_KEYFRAME : 0);
3066  av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3067  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
3068  offset, dts, sample_size, distance, keyframe);
3069  distance++;
3070  dts += sample_duration;
3071  offset += sample_size;
3072  sc->data_size += sample_size;
3073  sc->duration_for_fps += sample_duration;
3074  sc->nb_frames_for_fps ++;
3075  }
3076 
3077  if (pb->eof_reached)
3078  return AVERROR_EOF;
3079 
3080  frag->implicit_offset = offset;
3081  st->duration = sc->track_end = dts + sc->time_offset;
3082  return 0;
3083 }
3084 
3085 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
3086 /* like the files created with Adobe Premiere 5.0, for samples see */
3087 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
3089 {
3090  int err;
3091 
3092  if (atom.size < 8)
3093  return 0; /* continue */
3094  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
3095  avio_skip(pb, atom.size - 4);
3096  return 0;
3097  }
3098  atom.type = avio_rl32(pb);
3099  atom.size -= 8;
3100  if (atom.type != MKTAG('m','d','a','t')) {
3101  avio_skip(pb, atom.size);
3102  return 0;
3103  }
3104  err = mov_read_mdat(c, pb, atom);
3105  return err;
3106 }
3107 
3109 {
3110 #if CONFIG_ZLIB
3111  AVIOContext ctx;
3112  uint8_t *cmov_data;
3113  uint8_t *moov_data; /* uncompressed data */
3114  long cmov_len, moov_len;
3115  int ret = -1;
3116 
3117  avio_rb32(pb); /* dcom atom */
3118  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
3119  return AVERROR_INVALIDDATA;
3120  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
3121  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
3122  return AVERROR_INVALIDDATA;
3123  }
3124  avio_rb32(pb); /* cmvd atom */
3125  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
3126  return AVERROR_INVALIDDATA;
3127  moov_len = avio_rb32(pb); /* uncompressed size */
3128  cmov_len = atom.size - 6 * 4;
3129 
3130  cmov_data = av_malloc(cmov_len);
3131  if (!cmov_data)
3132  return AVERROR(ENOMEM);
3133  moov_data = av_malloc(moov_len);
3134  if (!moov_data) {
3135  av_free(cmov_data);
3136  return AVERROR(ENOMEM);
3137  }
3138  avio_read(pb, cmov_data, cmov_len);
3139  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
3140  goto free_and_return;
3141  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
3142  goto free_and_return;
3143  atom.type = MKTAG('m','o','o','v');
3144  atom.size = moov_len;
3145  ret = mov_read_default(c, &ctx, atom);
3146 free_and_return:
3147  av_free(moov_data);
3148  av_free(cmov_data);
3149  return ret;
3150 #else
3151  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
3152  return AVERROR(ENOSYS);
3153 #endif
3154 }
3155 
3156 /* edit list atom */
3158 {
3159  MOVStreamContext *sc;
3160  int i, edit_count, version, edit_start_index = 0;
3161  int unsupported = 0;
3162 
3163  if (c->fc->nb_streams < 1 || c->ignore_editlist)
3164  return 0;
3165  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
3166 
3167  version = avio_r8(pb); /* version */
3168  avio_rb24(pb); /* flags */
3169  edit_count = avio_rb32(pb); /* entries */
3170 
3171  if ((uint64_t)edit_count*12+8 > atom.size)
3172  return AVERROR_INVALIDDATA;
3173 
3174  av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3175  for (i=0; i<edit_count; i++){
3176  int64_t time;
3177  int64_t duration;
3178  int rate;
3179  if (version == 1) {
3180  duration = avio_rb64(pb);
3181  time = avio_rb64(pb);
3182  } else {
3183  duration = avio_rb32(pb); /* segment duration */
3184  time = (int32_t)avio_rb32(pb); /* media time */
3185  }
3186  rate = avio_rb32(pb);
3187  if (i == 0 && time == -1) {
3188  sc->empty_duration = duration;
3189  edit_start_index = 1;
3190  } else if (i == edit_start_index && time >= 0)
3191  sc->start_time = time;
3192  else
3193  unsupported = 1;
3194 
3195  av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3196  duration, time, rate / 65536.0);
3197  }
3198 
3199  if (unsupported)
3200  av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
3201  "a/v desync might occur, patch welcome\n");
3202 
3203  return 0;
3204 }
3205 
3207 {
3208  MOVStreamContext *sc;
3209 
3210  if (c->fc->nb_streams < 1)
3211  return AVERROR_INVALIDDATA;
3212  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3213  sc->timecode_track = avio_rb32(pb);
3214  return 0;
3215 }
3216 
3218 {
3219  int ret;
3220  uint8_t uuid[16];
3221  static const uint8_t uuid_isml_manifest[] = {
3222  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3223  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3224  };
3225 
3226  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3227  return AVERROR_INVALIDDATA;
3228 
3229  ret = avio_read(pb, uuid, sizeof(uuid));
3230  if (ret < 0) {
3231  return ret;
3232  } else if (ret != sizeof(uuid)) {
3233  return AVERROR_INVALIDDATA;
3234  }
3235  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3236  uint8_t *buffer, *ptr;
3237  char *endptr;
3238  size_t len = atom.size - sizeof(uuid);
3239 
3240  if (len < 4) {
3241  return AVERROR_INVALIDDATA;
3242  }
3243  ret = avio_skip(pb, 4); // zeroes
3244  len -= 4;
3245 
3246  buffer = av_mallocz(len + 1);
3247  if (!buffer) {
3248  return AVERROR(ENOMEM);
3249  }
3250  ret = avio_read(pb, buffer, len);
3251  if (ret < 0) {
3252  av_free(buffer);
3253  return ret;
3254  } else if (ret != len) {
3255  av_free(buffer);
3256  return AVERROR_INVALIDDATA;
3257  }
3258 
3259  ptr = buffer;
3260  while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
3261  ptr += sizeof("systemBitrate=\"") - 1;
3262  c->bitrates_count++;
3263  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3264  if (!c->bitrates) {
3265  c->bitrates_count = 0;
3266  av_free(buffer);
3267  return AVERROR(ENOMEM);
3268  }
3269  errno = 0;
3270  ret = strtol(ptr, &endptr, 10);
3271  if (ret < 0 || errno || *endptr != '"') {
3272  c->bitrates[c->bitrates_count - 1] = 0;
3273  } else {
3274  c->bitrates[c->bitrates_count - 1] = ret;
3275  }
3276  }
3277 
3278  av_free(buffer);
3279  }
3280  return 0;
3281 }
3282 
3284 {
3285  int ret;
3286  uint8_t content[16];
3287 
3288  if (atom.size < 8)
3289  return 0;
3290 
3291  ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
3292  if (ret < 0)
3293  return ret;
3294 
3295  if ( !c->found_moov
3296  && !c->found_mdat
3297  && !memcmp(content, "Anevia\x1A\x1A", 8)
3300  }
3301 
3302  return 0;
3303 }
3304 
3306 { MKTAG('A','C','L','R'), mov_read_avid },
3307 { MKTAG('A','P','R','G'), mov_read_avid },
3308 { MKTAG('A','A','L','P'), mov_read_avid },
3309 { MKTAG('A','R','E','S'), mov_read_ares },
3310 { MKTAG('a','v','s','s'), mov_read_avss },
3311 { MKTAG('c','h','p','l'), mov_read_chpl },
3312 { MKTAG('c','o','6','4'), mov_read_stco },
3313 { MKTAG('c','o','l','r'), mov_read_colr },
3314 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
3315 { MKTAG('d','i','n','f'), mov_read_default },
3316 { MKTAG('d','r','e','f'), mov_read_dref },
3317 { MKTAG('e','d','t','s'), mov_read_default },
3318 { MKTAG('e','l','s','t'), mov_read_elst },
3319 { MKTAG('e','n','d','a'), mov_read_enda },
3320 { MKTAG('f','i','e','l'), mov_read_fiel },
3321 { MKTAG('f','t','y','p'), mov_read_ftyp },
3322 { MKTAG('g','l','b','l'), mov_read_glbl },
3323 { MKTAG('h','d','l','r'), mov_read_hdlr },
3324 { MKTAG('i','l','s','t'), mov_read_ilst },
3325 { MKTAG('j','p','2','h'), mov_read_jp2h },
3326 { MKTAG('m','d','a','t'), mov_read_mdat },
3327 { MKTAG('m','d','h','d'), mov_read_mdhd },
3328 { MKTAG('m','d','i','a'), mov_read_default },
3329 { MKTAG('m','e','t','a'), mov_read_meta },
3330 { MKTAG('m','i','n','f'), mov_read_default },
3331 { MKTAG('m','o','o','f'), mov_read_moof },
3332 { MKTAG('m','o','o','v'), mov_read_moov },
3333 { MKTAG('m','v','e','x'), mov_read_default },
3334 { MKTAG('m','v','h','d'), mov_read_mvhd },
3335 { MKTAG('S','M','I',' '), mov_read_svq3 },
3336 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
3337 { MKTAG('a','v','c','C'), mov_read_glbl },
3338 { MKTAG('p','a','s','p'), mov_read_pasp },
3339 { MKTAG('s','t','b','l'), mov_read_default },
3340 { MKTAG('s','t','c','o'), mov_read_stco },
3341 { MKTAG('s','t','p','s'), mov_read_stps },
3342 { MKTAG('s','t','r','f'), mov_read_strf },
3343 { MKTAG('s','t','s','c'), mov_read_stsc },
3344 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
3345 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
3346 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
3347 { MKTAG('s','t','t','s'), mov_read_stts },
3348 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
3349 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
3350 { MKTAG('t','f','d','t'), mov_read_tfdt },
3351 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
3352 { MKTAG('t','r','a','k'), mov_read_trak },
3353 { MKTAG('t','r','a','f'), mov_read_default },
3354 { MKTAG('t','r','e','f'), mov_read_default },
3355 { MKTAG('t','m','c','d'), mov_read_tmcd },
3356 { MKTAG('c','h','a','p'), mov_read_chap },
3357 { MKTAG('t','r','e','x'), mov_read_trex },
3358 { MKTAG('t','r','u','n'), mov_read_trun },
3359 { MKTAG('u','d','t','a'), mov_read_default },
3360 { MKTAG('w','a','v','e'), mov_read_wave },
3361 { MKTAG('e','s','d','s'), mov_read_esds },
3362 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
3363 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
3364 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
3365 { MKTAG('w','f','e','x'), mov_read_wfex },
3366 { MKTAG('c','m','o','v'), mov_read_cmov },
3367 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
3368 { MKTAG('d','v','c','1'), mov_read_dvc1 },
3369 { MKTAG('s','b','g','p'), mov_read_sbgp },
3370 { MKTAG('h','v','c','C'), mov_read_glbl },
3371 { MKTAG('u','u','i','d'), mov_read_uuid },
3372 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
3373 { MKTAG('f','r','e','e'), mov_read_free },
3374 { MKTAG('-','-','-','-'), mov_read_custom },
3375 { 0, NULL }
3376 };
3377 
3379 {
3380  int64_t total_size = 0;
3381  MOVAtom a;
3382  int i;
3383 
3384  if (atom.size < 0)
3385  atom.size = INT64_MAX;
3386  while (total_size + 8 <= atom.size && !avio_feof(pb)) {
3387  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
3388  a.size = atom.size;
3389  a.type=0;
3390  if (atom.size >= 8) {
3391  a.size = avio_rb32(pb);
3392  a.type = avio_rl32(pb);
3393  if (a.type == MKTAG('f','r','e','e') &&
3394  a.size >= 8 &&
3395  c->moov_retry) {
3396  uint8_t buf[8];
3397  uint32_t *type = (uint32_t *)buf + 1;
3398  avio_read(pb, buf, 8);
3399  avio_seek(pb, -8, SEEK_CUR);
3400  if (*type == MKTAG('m','v','h','d') ||
3401  *type == MKTAG('c','m','o','v')) {
3402  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
3403  a.type = MKTAG('m','o','o','v');
3404  }
3405  }
3406  if (atom.type != MKTAG('r','o','o','t') &&
3407  atom.type != MKTAG('m','o','o','v'))
3408  {
3409  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
3410  {
3411  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
3412  avio_skip(pb, -8);
3413  return 0;
3414  }
3415  }
3416  total_size += 8;
3417  if (a.size == 1) { /* 64 bit extended size */
3418  a.size = avio_rb64(pb) - 8;
3419  total_size += 8;
3420  }
3421  }
3422  av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3423  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3424  if (a.size == 0) {
3425  a.size = atom.size - total_size + 8;
3426  }
3427  a.size -= 8;
3428  if (a.size < 0)
3429  break;
3430  a.size = FFMIN(a.size, atom.size - total_size);
3431 
3432  for (i = 0; mov_default_parse_table[i].type; i++)
3433  if (mov_default_parse_table[i].type == a.type) {
3434  parse = mov_default_parse_table[i].parse;
3435  break;
3436  }
3437 
3438  // container is user data
3439  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3440  atom.type == MKTAG('i','l','s','t')))
3442 
3443  if (!parse) { /* skip leaf atoms data */
3444  avio_skip(pb, a.size);
3445  } else {
3446  int64_t start_pos = avio_tell(pb);
3447  int64_t left;
3448  int err = parse(c, pb, a);
3449  if (err < 0)
3450  return err;
3451  if (c->found_moov && c->found_mdat &&
3452  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3453  start_pos + a.size == avio_size(pb))) {
3454  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3455  c->next_root_atom = start_pos + a.size;
3456  return 0;
3457  }
3458  left = a.size - avio_tell(pb) + start_pos;
3459  if (left > 0) /* skip garbage at atom end */
3460  avio_skip(pb, left);
3461  else if (left < 0) {
3462  av_log(c->fc, AV_LOG_WARNING,
3463  "overread end of atom '%.4s' by %"PRId64" bytes\n",
3464  (char*)&a.type, -left);
3465  avio_seek(pb, left, SEEK_CUR);
3466  }
3467  }
3468 
3469  total_size += a.size;
3470  }
3471 
3472  if (total_size < atom.size && atom.size < 0x7ffff)
3473  avio_skip(pb, atom.size - total_size);
3474 
3475  return 0;
3476 }
3477 
3478 static int mov_probe(AVProbeData *p)
3479 {
3480  int64_t offset;
3481  uint32_t tag;
3482  int score = 0;
3483  int moov_offset = -1;
3484 
3485  /* check file header */
3486  offset = 0;
3487  for (;;) {
3488  /* ignore invalid offset */
3489  if ((offset + 8) > (unsigned int)p->buf_size)
3490  break;
3491  tag = AV_RL32(p->buf + offset + 4);
3492  switch(tag) {
3493  /* check for obvious tags */
3494  case MKTAG('m','o','o','v'):
3495  moov_offset = offset + 4;
3496  case MKTAG('m','d','a','t'):
3497  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3498  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3499  case MKTAG('f','t','y','p'):
3500  if (AV_RB32(p->buf+offset) < 8 &&
3501  (AV_RB32(p->buf+offset) != 1 ||
3502  offset + 12 > (unsigned int)p->buf_size ||
3503  AV_RB64(p->buf+offset + 8) == 0)) {
3504  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3505  } else if (tag == MKTAG('f','t','y','p') &&
3506  AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')) {
3507  score = FFMAX(score, 5);
3508  } else {
3509  score = AVPROBE_SCORE_MAX;
3510  }
3511  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3512  break;
3513  /* those are more common words, so rate then a bit less */
3514  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3515  case MKTAG('w','i','d','e'):
3516  case MKTAG('f','r','e','e'):
3517  case MKTAG('j','u','n','k'):
3518  case MKTAG('p','i','c','t'):
3519  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3520  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3521  break;
3522  case MKTAG(0x82,0x82,0x7f,0x7d):
3523  case MKTAG('s','k','i','p'):
3524  case MKTAG('u','u','i','d'):
3525  case MKTAG('p','r','f','l'):
3526  /* if we only find those cause probedata is too small at least rate them */
3527  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3528  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3529  break;
3530  default:
3531  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3532  }
3533  }
3534  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3535  /* moov atom in the header - we should make sure that this is not a
3536  * MOV-packed MPEG-PS */
3537  offset = moov_offset;
3538 
3539  while(offset < (p->buf_size - 16)){ /* Sufficient space */
3540  /* We found an actual hdlr atom */
3541  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3542  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3543  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3544  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3545  /* We found a media handler reference atom describing an
3546  * MPEG-PS-in-MOV, return a
3547  * low score to force expanding the probe window until
3548  * mpegps_probe finds what it needs */
3549  return 5;
3550  }else
3551  /* Keep looking */
3552  offset+=2;
3553  }
3554  }
3555 
3556  return score;
3557 }
3558 
3559 // must be done after parsing all trak because there's no order requirement
3561 {
3562  MOVContext *mov = s->priv_data;
3563  AVStream *st = NULL;
3564  MOVStreamContext *sc;
3565  int64_t cur_pos;
3566  int i;
3567 
3568  for (i = 0; i < s->nb_streams; i++)
3569  if (s->streams[i]->id == mov->chapter_track) {
3570  st = s->streams[i];
3571  break;
3572  }
3573  if (!st) {
3574  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3575  return;
3576  }
3577 
3578  st->discard = AVDISCARD_ALL;
3579  sc = st->priv_data;
3580  cur_pos = avio_tell(sc->pb);
3581 
3582  for (i = 0; i < st->nb_index_entries; i++) {
3583  AVIndexEntry *sample = &st->index_entries[i];
3584  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3585  uint8_t *title;
3586  uint16_t ch;
3587  int len, title_len;
3588 
3589  if (end < sample->timestamp) {
3590  av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
3591  end = AV_NOPTS_VALUE;
3592  }
3593 
3594  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3595  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3596  goto finish;
3597  }
3598 
3599  // the first two bytes are the length of the title
3600  len = avio_rb16(sc->pb);
3601  if (len > sample->size-2)
3602  continue;
3603  title_len = 2*len + 1;
3604  if (!(title = av_mallocz(title_len)))
3605  goto finish;
3606 
3607  // The samples could theoretically be in any encoding if there's an encd
3608  // atom following, but in practice are only utf-8 or utf-16, distinguished
3609  // instead by the presence of a BOM
3610  if (!len) {
3611  title[0] = 0;
3612  } else {
3613  ch = avio_rb16(sc->pb);
3614  if (ch == 0xfeff)
3615  avio_get_str16be(sc->pb, len, title, title_len);
3616  else if (ch == 0xfffe)
3617  avio_get_str16le(sc->pb, len, title, title_len);
3618  else {
3619  AV_WB16(title, ch);
3620  if (len == 1 || len == 2)
3621  title[len] = 0;
3622  else
3623  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3624  }
3625  }
3626 
3627  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3628  av_freep(&title);
3629  }
3630 finish:
3631  avio_seek(sc->pb, cur_pos, SEEK_SET);
3632 }
3633 
3635  uint32_t value, int flags)
3636 {
3637  AVTimecode tc;
3638  char buf[AV_TIMECODE_STR_SIZE];
3639  AVRational rate = {st->codec->time_base.den,
3640  st->codec->time_base.num};
3641  int ret = av_timecode_init(&tc, rate, flags, 0, s);
3642  if (ret < 0)
3643  return ret;
3644  av_dict_set(&st->metadata, "timecode",
3645  av_timecode_make_string(&tc, buf, value), 0);
3646  return 0;
3647 }
3648 
3650 {
3651  MOVStreamContext *sc = st->priv_data;
3652  int flags = 0;
3653  int64_t cur_pos = avio_tell(sc->pb);
3654  uint32_t value;
3655 
3656  if (!st->nb_index_entries)
3657  return -1;
3658 
3659  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3660  value = avio_rb32(s->pb);
3661 
3662  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3663  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3664  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3665 
3666  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3667  * not the case) and thus assume "frame number format" instead of QT one.
3668  * No sample with tmcd track can be found with a QT timecode at the moment,
3669  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3670  * format). */
3671  parse_timecode_in_framenum_format(s, st, value, flags);
3672 
3673  avio_seek(sc->pb, cur_pos, SEEK_SET);
3674  return 0;
3675 }
3676 
3678 {
3679  MOVContext *mov = s->priv_data;
3680  int i, j;
3681 
3682  for (i = 0; i < s->nb_streams; i++) {
3683  AVStream *st = s->streams[i];
3684  MOVStreamContext *sc = st->priv_data;
3685 
3686  av_freep(&sc->ctts_data);
3687  for (j = 0; j < sc->drefs_count; j++) {
3688  av_freep(&sc->drefs[j].path);
3689  av_freep(&sc->drefs[j].dir);
3690  }
3691  av_freep(&sc->drefs);
3692 
3693  sc->drefs_count = 0;
3694 
3695  if (!sc->pb_is_copied)
3696  avio_close(sc->pb);
3697 
3698  sc->pb = NULL;
3699  av_freep(&sc->chunk_offsets);
3700  av_freep(&sc->stsc_data);
3701  av_freep(&sc->sample_sizes);
3702  av_freep(&sc->keyframes);
3703  av_freep(&sc->stts_data);
3704  av_freep(&sc->stps_data);
3705  av_freep(&sc->rap_group);
3706  av_freep(&sc->display_matrix);
3707  }
3708 
3709  if (mov->dv_demux) {
3711  mov->dv_fctx = NULL;
3712  }
3713 
3714  av_freep(&mov->trex_data);
3715  av_freep(&mov->bitrates);
3716 
3717  for (i = 0; i < mov->fragment_index_count; i++) {
3719  av_freep(&index->items);
3720  av_freep(&mov->fragment_index_data[i]);
3721  }
3723 
3724  return 0;
3725 }
3726 
3727 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
3728 {
3729  int i;
3730 
3731  for (i = 0; i < s->nb_streams; i++) {
3732  AVStream *st = s->streams[i];
3733  MOVStreamContext *sc = st->priv_data;
3734 
3735  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3736  sc->timecode_track == tmcd_id)
3737  return 1;
3738  }
3739  return 0;
3740 }
3741 
3742 /* look for a tmcd track not referenced by any video track, and export it globally */
3744 {
3745  int i;
3746 
3747  for (i = 0; i < s->nb_streams; i++) {
3748  AVStream *st = s->streams[i];
3749 
3750  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
3751  !tmcd_is_referenced(s, i + 1)) {
3752  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
3753  if (tcr) {
3754  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
3755  break;
3756  }
3757  }
3758  }
3759 }
3760 
3761 static int read_tfra(MOVContext *mov, AVIOContext *f)
3762 {
3763  MOVFragmentIndex* index = NULL;
3764  int version, fieldlength, i, j, err;
3765  int64_t pos = avio_tell(f);
3766  uint32_t size = avio_rb32(f);
3767  if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a')) {
3768  return -1;
3769  }
3770  av_log(mov->fc, AV_LOG_VERBOSE, "found tfra\n");
3771  index = av_mallocz(sizeof(MOVFragmentIndex));
3772  if (!index) {
3773  return AVERROR(ENOMEM);
3774  }
3775  mov->fragment_index_count++;
3776  if ((err = av_reallocp(&mov->fragment_index_data,
3777  mov->fragment_index_count *
3778  sizeof(MOVFragmentIndex*))) < 0) {
3779  av_freep(&index);
3780  return err;
3781  }
3782  mov->fragment_index_data[mov->fragment_index_count - 1] =
3783  index;
3784 
3785  version = avio_r8(f);
3786  avio_rb24(f);
3787  index->track_id = avio_rb32(f);
3788  fieldlength = avio_rb32(f);
3789  index->item_count = avio_rb32(f);
3790  index->items = av_mallocz(
3791  index->item_count * sizeof(MOVFragmentIndexItem));
3792  if (!index->items) {
3793  return AVERROR(ENOMEM);
3794  }
3795  for (i = 0; i < index->item_count; i++) {
3796  int64_t time, offset;
3797  if (version == 1) {
3798  time = avio_rb64(f);
3799  offset = avio_rb64(f);
3800  } else {
3801  time = avio_rb32(f);
3802  offset = avio_rb32(f);
3803  }
3804  index->items[i].time = time;
3805  index->items[i].moof_offset = offset;
3806  for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
3807  avio_r8(f);
3808  for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
3809  avio_r8(f);
3810  for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
3811  avio_r8(f);
3812  }
3813 
3814  avio_seek(f, pos + size, SEEK_SET);
3815  return 0;
3816 }
3817 
3819 {
3820  int64_t stream_size = avio_size(f);
3821  int64_t original_pos = avio_tell(f);
3822  int64_t seek_ret;
3823  int32_t mfra_size;
3824  int ret = -1;
3825  if ((seek_ret = avio_seek(f, stream_size - 4, SEEK_SET)) < 0) {
3826  ret = seek_ret;
3827  goto fail;
3828  }
3829  mfra_size = avio_rb32(f);
3830  if (mfra_size < 0 || mfra_size > stream_size) {
3831  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (unreasonable size)\n");
3832  goto fail;
3833  }
3834  if ((seek_ret = avio_seek(f, -mfra_size, SEEK_CUR)) < 0) {
3835  ret = seek_ret;
3836  goto fail;
3837  }
3838  if (avio_rb32(f) != mfra_size) {
3839  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (size mismatch)\n");
3840  goto fail;
3841  }
3842  if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
3843  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (tag mismatch)\n");
3844  goto fail;
3845  }
3846  ret = 0;
3847  av_log(c->fc, AV_LOG_VERBOSE, "stream has mfra\n");
3848  while (!read_tfra(c, f)) {
3849  /* Empty */
3850  }
3851 fail:
3852  seek_ret = avio_seek(f, original_pos, SEEK_SET);
3853  if (seek_ret < 0) {
3854  av_log(c->fc, AV_LOG_ERROR,
3855  "failed to seek back after looking for mfra\n");
3856  ret = seek_ret;
3857  }
3858  return ret;
3859 }
3860 
3862 {
3863  MOVContext *mov = s->priv_data;
3864  AVIOContext *pb = s->pb;
3865  int j, err;
3866  MOVAtom atom = { AV_RL32("root") };
3867  int i;
3868 
3869  mov->fc = s;
3870  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
3871  if (pb->seekable)
3872  atom.size = avio_size(pb);
3873  else
3874  atom.size = INT64_MAX;
3875 
3876  /* check MOV header */
3877  do {
3878  if (mov->moov_retry)
3879  avio_seek(pb, 0, SEEK_SET);
3880  if ((err = mov_read_default(mov, pb, atom)) < 0) {
3881  av_log(s, AV_LOG_ERROR, "error reading header\n");
3882  mov_read_close(s);
3883  return err;
3884  }
3885  } while (pb->seekable && !mov->found_moov && !mov->moov_retry++);
3886  if (!mov->found_moov) {
3887  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
3888  mov_read_close(s);
3889  return AVERROR_INVALIDDATA;
3890  }
3891  av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
3892 
3893  if (pb->seekable) {
3894  if (mov->chapter_track > 0)
3895  mov_read_chapters(s);
3896  for (i = 0; i < s->nb_streams; i++)
3897  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
3898  mov_read_timecode_track(s, s->streams[i]);
3899  }
3900 
3901  /* copy timecode metadata from tmcd tracks to the related video streams */
3902  for (i = 0; i < s->nb_streams; i++) {
3903  AVStream *st = s->streams[i];
3904  MOVStreamContext *sc = st->priv_data;
3905  if (sc->timecode_track > 0) {
3906  AVDictionaryEntry *tcr;
3907  int tmcd_st_id = -1;
3908 
3909  for (j = 0; j < s->nb_streams; j++)
3910  if (s->streams[j]->id == sc->timecode_track)
3911  tmcd_st_id = j;
3912 
3913  if (tmcd_st_id < 0 || tmcd_st_id == i)
3914  continue;
3915  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
3916  if (tcr)
3917  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
3918  }
3919  }
3921 
3922  for (i = 0; i < s->nb_streams; i++) {
3923  AVStream *st = s->streams[i];
3924  MOVStreamContext *sc = st->priv_data;
3925  fix_timescale(mov, sc);
3927  st->skip_samples = sc->start_pad;
3928  }
3929  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
3931  sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
3932  if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3933  if (st->codec->width <= 0 || st->codec->height <= 0) {
3934  st->codec->width = sc->width;
3935  st->codec->height = sc->height;
3936  }
3937  if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
3938  if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
3939  return err;
3940  }
3941  }
3942  }
3943 
3944  if (mov->trex_data) {
3945  for (i = 0; i < s->nb_streams; i++) {
3946  AVStream *st = s->streams[i];
3947  MOVStreamContext *sc = st->priv_data;
3948  if (st->duration > 0)
3949  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
3950  }
3951  }
3952 
3953  if (mov->use_mfra_for > 0) {
3954  for (i = 0; i < s->nb_streams; i++) {
3955  AVStream *st = s->streams[i];
3956  MOVStreamContext *sc = st->priv_data;
3957  if (sc->duration_for_fps > 0) {
3958  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale /
3959  sc->duration_for_fps;
3960  }
3961  }
3962  }
3963 
3964  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
3965  if (mov->bitrates[i]) {
3966  s->streams[i]->codec->bit_rate = mov->bitrates[i];
3967  }
3968  }
3969 
3970  ff_rfps_calculate(s);
3971 
3972  for (i = 0; i < s->nb_streams; i++) {
3973  AVStream *st = s->streams[i];
3974  MOVStreamContext *sc = st->priv_data;
3975 
3976  switch (st->codec->codec_type) {
3977  case AVMEDIA_TYPE_AUDIO:
3978  err = ff_replaygain_export(st, s->metadata);
3979  if (err < 0) {
3980  mov_read_close(s);
3981  return err;
3982  }
3983  break;
3984  case AVMEDIA_TYPE_VIDEO:
3985  if (sc->display_matrix) {
3986  AVPacketSideData *sd, *tmp;
3987 
3988  tmp = av_realloc_array(st->side_data,
3989  st->nb_side_data + 1, sizeof(*tmp));
3990  if (!tmp)
3991  return AVERROR(ENOMEM);
3992 
3993  st->side_data = tmp;
3994  st->nb_side_data++;
3995 
3996  sd = &st->side_data[st->nb_side_data - 1];
3998  sd->size = sizeof(int32_t) * 9;
3999  sd->data = (uint8_t*)sc->display_matrix;
4000  sc->display_matrix = NULL;
4001  }
4002  break;
4003  }
4004  }
4005 
4006  return 0;
4007 }
4008 
4010 {
4011  AVIndexEntry *sample = NULL;
4012  int64_t best_dts = INT64_MAX;
4013  int i;
4014  for (i = 0; i < s->nb_streams; i++) {
4015  AVStream *avst = s->streams[i];
4016  MOVStreamContext *msc = avst->priv_data;
4017  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
4018  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
4019  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
4020  av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
4021  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
4022  (s->pb->seekable &&
4023  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
4024  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
4025  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
4026  sample = current_sample;
4027  best_dts = dts;
4028  *st = avst;
4029  }
4030  }
4031  }
4032  return sample;
4033 }
4034 
4036 {
4037  MOVContext *mov = s->priv_data;
4038  MOVStreamContext *sc;
4040  AVStream *st = NULL;
4041  int ret;
4042  mov->fc = s;
4043  retry:
4044  sample = mov_find_next_sample(s, &st);
4045  if (!sample) {
4046  mov->found_mdat = 0;
4047  if (!mov->next_root_atom)
4048  return AVERROR_EOF;
4049  avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
4050  mov->next_root_atom = 0;
4051  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
4052  avio_feof(s->pb))
4053  return AVERROR_EOF;
4054  av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
4055  goto retry;
4056  }
4057  sc = st->priv_data;
4058  /* must be done just before reading, to avoid infinite loop on sample */
4059  sc->current_sample++;
4060 
4061  if (mov->next_root_atom) {
4062  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
4063  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
4064  }
4065 
4066  if (st->discard != AVDISCARD_ALL) {
4067  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
4068  av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
4069  sc->ffindex, sample->pos);
4070  return AVERROR_INVALIDDATA;
4071  }
4072  ret = av_get_packet(sc->pb, pkt, sample->size);
4073  if (ret < 0)
4074  return ret;
4075  if (sc->has_palette) {
4076  uint8_t *pal;
4077 
4079  if (!pal) {
4080  av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
4081  } else {
4082  memcpy(pal, sc->palette, AVPALETTE_SIZE);
4083  sc->has_palette = 0;
4084  }
4085  }
4086 #if CONFIG_DV_DEMUXER
4087  if (mov->dv_demux && sc->dv_audio_container) {
4088  avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
4089  av_free(pkt->data);
4090  pkt->size = 0;
4091  ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
4092  if (ret < 0)
4093  return ret;
4094  }
4095 #endif
4096  }
4097 
4098  pkt->stream_index = sc->ffindex;
4099  pkt->dts = sample->timestamp;
4100  if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
4101  pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
4102  /* update ctts context */
4103  sc->ctts_sample++;
4104  if (sc->ctts_index < sc->ctts_count &&
4105  sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
4106  sc->ctts_index++;
4107  sc->ctts_sample = 0;
4108  }
4109  if (sc->wrong_dts)
4110  pkt->dts = AV_NOPTS_VALUE;
4111  } else {
4112  int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
4114  pkt->duration = next_dts - pkt->dts;
4115  pkt->pts = pkt->dts;
4116  }
4117  if (st->discard == AVDISCARD_ALL)
4118  goto retry;
4119  pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
4120  pkt->pos = sample->pos;
4121  av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
4122  pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
4123  return 0;
4124 }
4125 
4126 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
4127 {
4128  MOVStreamContext *sc = st->priv_data;
4129  int sample, time_sample;
4130  int i;
4131 
4132  sample = av_index_search_timestamp(st, timestamp, flags);
4133  av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
4134  if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
4135  sample = 0;
4136  if (sample < 0) /* not sure what to do */
4137  return AVERROR_INVALIDDATA;
4138  sc->current_sample = sample;
4139  av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
4140  /* adjust ctts index */
4141  if (sc->ctts_data) {
4142  time_sample = 0;
4143  for (i = 0; i < sc->ctts_count; i++) {
4144  int next = time_sample + sc->ctts_data[i].count;
4145  if (next > sc->current_sample) {
4146  sc->ctts_index = i;
4147  sc->ctts_sample = sc->current_sample - time_sample;
4148  break;
4149  }
4150  time_sample = next;
4151  }
4152  }
4153  return sample;
4154 }
4155 
4156 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
4157 {
4158  AVStream *st;
4159  int64_t seek_timestamp, timestamp;
4160  int sample;
4161  int i;
4162 
4163  if (stream_index >= s->nb_streams)
4164  return AVERROR_INVALIDDATA;
4165 
4166  st = s->streams[stream_index];
4167  sample = mov_seek_stream(s, st, sample_time, flags);
4168  if (sample < 0)
4169  return sample;
4170 
4171  /* adjust seek timestamp to found sample timestamp */
4172  seek_timestamp = st->index_entries[sample].timestamp;
4173 
4174  for (i = 0; i < s->nb_streams; i++) {
4175  MOVStreamContext *sc = s->streams[i]->priv_data;
4176  st = s->streams[i];
4177  st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
4178 
4179  if (stream_index == i)
4180  continue;
4181 
4182  timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
4183  mov_seek_stream(s, st, timestamp, flags);
4184  }
4185  return 0;
4186 }
4187 
4188 static const AVOption options[] = {
4189  {"use_absolute_path",
4190  "allow using absolute path when opening alias, this is a possible security issue",
4191  offsetof(MOVContext, use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
4193  {"ignore_editlist", "", offsetof(MOVContext, ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
4195  {"use_mfra_for",
4196  "use mfra for fragment timestamps",
4197  offsetof(MOVContext, use_mfra_for), FF_OPT_TYPE_INT, {.i64 = FF_MOV_FLAG_MFRA_AUTO},
4199  "use_mfra_for"},
4200  {"auto", "auto", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_AUTO}, 0, 0,
4202  {"dts", "dts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_DTS}, 0, 0,
4204  {"pts", "pts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_PTS}, 0, 0,
4206  {NULL}
4207 };
4208 
4209 static const AVClass mov_class = {
4210  .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
4211  .item_name = av_default_item_name,
4212  .option = options,
4213  .version = LIBAVUTIL_VERSION_INT,
4214 };
4215 
4217  .name = "mov,mp4,m4a,3gp,3g2,mj2",
4218  .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
4219  .priv_data_size = sizeof(MOVContext),
4220  .extensions = "mov,mp4,m4a,3gp,3g2,mj2",
4221  .read_probe = mov_probe,
4226  .priv_class = &mov_class,
4228 };