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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 <limits.h>
27 
28 //#define MOV_EXPORT_ALL_METADATA
29 
30 #include "libavutil/attributes.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/intfloat.h"
34 #include "libavutil/mathematics.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/dict.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/timecode.h"
39 #include "libavcodec/ac3tab.h"
40 #include "avformat.h"
41 #include "internal.h"
42 #include "avio_internal.h"
43 #include "riff.h"
44 #include "isom.h"
45 #include "libavcodec/get_bits.h"
46 #include "id3v1.h"
47 #include "mov_chan.h"
48 
49 #if CONFIG_ZLIB
50 #include <zlib.h>
51 #endif
52 
53 #include "qtpalette.h"
54 
55 
56 #undef NDEBUG
57 #include <assert.h>
58 
59 /* those functions parse an atom */
60 /* links atom IDs to parse functions */
61 typedef struct MOVParseTableEntry {
62  uint32_t type;
63  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
65 
66 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
67 
69  unsigned len, const char *key)
70 {
71  char buf[16];
72 
73  short current, total = 0;
74  avio_rb16(pb); // unknown
75  current = avio_rb16(pb);
76  if (len >= 6)
77  total = avio_rb16(pb);
78  if (!total)
79  snprintf(buf, sizeof(buf), "%d", current);
80  else
81  snprintf(buf, sizeof(buf), "%d/%d", current, total);
82  av_dict_set(&c->fc->metadata, key, buf, 0);
83 
84  return 0;
85 }
86 
88  unsigned len, const char *key)
89 {
90  char buf[16];
91 
92  /* bypass padding bytes */
93  avio_r8(pb);
94  avio_r8(pb);
95  avio_r8(pb);
96 
97  snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
98  av_dict_set(&c->fc->metadata, key, buf, 0);
99 
100  return 0;
101 }
102 
104  unsigned len, const char *key)
105 {
106  char buf[16];
107 
108  snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
109  av_dict_set(&c->fc->metadata, key, buf, 0);
110 
111  return 0;
112 }
113 
115  unsigned len, const char *key)
116 {
117  short genre;
118  char buf[20];
119 
120  avio_r8(pb); // unknown
121 
122  genre = avio_r8(pb);
123  if (genre < 1 || genre > ID3v1_GENRE_MAX)
124  return 0;
125  snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
126  av_dict_set(&c->fc->metadata, key, buf, 0);
127 
128  return 0;
129 }
130 
132 {
133  char key[1024]={0}, data[1024]={0};
134  int i;
135  AVStream *st;
136  MOVStreamContext *sc;
137 
138  if (c->fc->nb_streams < 1)
139  return 0;
140  st = c->fc->streams[c->fc->nb_streams-1];
141  sc = st->priv_data;
142 
143  if (atom.size <= 8) return 0;
144 
145  for (i = 0; i < 3; i++) { // Parse up to three sub-atoms looking for name and data.
146  int data_size = avio_rb32(pb);
147  int tag = avio_rl32(pb);
148  int str_size = 0, skip_size = 0;
149  char *target = NULL;
150 
151  switch (tag) {
152  case MKTAG('n','a','m','e'):
153  avio_rb32(pb); // version/flags
154  str_size = skip_size = data_size - 12;
155  atom.size -= 12;
156  target = key;
157  break;
158  case MKTAG('d','a','t','a'):
159  avio_rb32(pb); // version/flags
160  avio_rb32(pb); // reserved (zero)
161  str_size = skip_size = data_size - 16;
162  atom.size -= 16;
163  target = data;
164  break;
165  default:
166  skip_size = data_size - 8;
167  str_size = 0;
168  break;
169  }
170 
171  if (target) {
172  str_size = FFMIN3(sizeof(data)-1, str_size, atom.size);
173  avio_read(pb, target, str_size);
174  target[str_size] = 0;
175  }
176  atom.size -= skip_size;
177 
178  // If we didn't read the full data chunk for the sub-atom, skip to the end of it.
179  if (skip_size > str_size) avio_skip(pb, skip_size - str_size);
180  }
181 
182  if (*key && *data) {
183  if (strcmp(key, "iTunSMPB") == 0) {
184  int priming, remainder, samples;
185  if(sscanf(data, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
186  if(priming>0 && priming<16384)
187  sc->start_pad = priming;
188  return 1;
189  }
190  }
191  if (strcmp(key, "cdec") == 0) {
192 // av_dict_set(&st->metadata, key, data, 0);
193  return 1;
194  }
195  }
196  return 0;
197 }
198 
199 static const uint32_t mac_to_unicode[128] = {
200  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
201  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
202  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
203  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
204  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
205  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
206  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
207  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
208  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
209  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
210  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
211  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
212  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
213  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
214  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
215  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
216 };
217 
219  char *dst, int dstlen)
220 {
221  char *p = dst;
222  char *end = dst+dstlen-1;
223  int i;
224 
225  for (i = 0; i < len; i++) {
226  uint8_t t, c = avio_r8(pb);
227  if (c < 0x80 && p < end)
228  *p++ = c;
229  else if (p < end)
230  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
231  }
232  *p = 0;
233  return p - dst;
234 }
235 
236 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
237 {
238  AVPacket pkt;
239  AVStream *st;
240  MOVStreamContext *sc;
241  enum AVCodecID id;
242  int ret;
243 
244  switch (type) {
245  case 0xd: id = AV_CODEC_ID_MJPEG; break;
246  case 0xe: id = AV_CODEC_ID_PNG; break;
247  case 0x1b: id = AV_CODEC_ID_BMP; break;
248  default:
249  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
250  avio_skip(pb, len);
251  return 0;
252  }
253 
254  st = avformat_new_stream(c->fc, NULL);
255  if (!st)
256  return AVERROR(ENOMEM);
257  sc = av_mallocz(sizeof(*sc));
258  if (!sc)
259  return AVERROR(ENOMEM);
260  st->priv_data = sc;
261 
262  ret = av_get_packet(pb, &pkt, len);
263  if (ret < 0)
264  return ret;
265 
267 
268  st->attached_pic = pkt;
269  st->attached_pic.stream_index = st->index;
271 
273  st->codec->codec_id = id;
274 
275  return 0;
276 }
277 
279  unsigned len, const char *key)
280 {
281  char *value = av_malloc(len + 1);
282  if (!value)
283  return AVERROR(ENOMEM);
284  avio_read(pb, value, len);
285  value[len] = 0;
286  return av_dict_set(&c->fc->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
287 }
288 
290 {
291 #ifdef MOV_EXPORT_ALL_METADATA
292  char tmp_key[5];
293 #endif
294  char str[1024], key2[16], language[4] = {0};
295  const char *key = NULL;
296  uint16_t langcode = 0;
297  uint32_t data_type = 0, str_size;
298  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
299 
300  if (c->itunes_metadata && atom.type == MKTAG('-','-','-','-'))
301  return mov_read_custom_metadata(c, pb, atom);
302 
303  switch (atom.type) {
304  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
305  case MKTAG(0xa9,'a','u','t'):
306  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
307  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
308  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
309  case MKTAG( 'c','p','r','t'):
310  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
311  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
312  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
313  case MKTAG(0xa9,'c','m','t'):
314  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
315  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
316  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
317  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
318  case MKTAG( 'g','n','r','e'): key = "genre";
319  parse = mov_metadata_gnre; break;
320  case MKTAG(0xa9,'t','o','o'):
321  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
322  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
323  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
324  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
325  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
326  case MKTAG( 'd','e','s','c'): key = "description";break;
327  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
328  case MKTAG( 't','v','s','h'): key = "show"; break;
329  case MKTAG( 't','v','e','n'): key = "episode_id";break;
330  case MKTAG( 't','v','n','n'): key = "network"; break;
331  case MKTAG( 't','r','k','n'): key = "track";
333  case MKTAG( 'd','i','s','k'): key = "disc";
335  case MKTAG( 't','v','e','s'): key = "episode_sort";
337  case MKTAG( 't','v','s','n'): key = "season_number";
339  case MKTAG( 's','t','i','k'): key = "media_type";
341  case MKTAG( 'h','d','v','d'): key = "hd_video";
343  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
345  case MKTAG( '@','P','R','M'):
346  return mov_metadata_raw(c, pb, atom.size, "premiere_version");
347  case MKTAG( '@','P','R','Q'):
348  return mov_metadata_raw(c, pb, atom.size, "quicktime_version");
349  }
350 
351  if (c->itunes_metadata && atom.size > 8) {
352  int data_size = avio_rb32(pb);
353  int tag = avio_rl32(pb);
354  if (tag == MKTAG('d','a','t','a')) {
355  data_type = avio_rb32(pb); // type
356  avio_rb32(pb); // unknown
357  str_size = data_size - 16;
358  atom.size -= 16;
359 
360  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
361  int ret = mov_read_covr(c, pb, data_type, str_size);
362  if (ret < 0) {
363  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
364  return ret;
365  }
366  }
367  } else return 0;
368  } else if (atom.size > 4 && key && !c->itunes_metadata) {
369  str_size = avio_rb16(pb); // string length
370  langcode = avio_rb16(pb);
371  ff_mov_lang_to_iso639(langcode, language);
372  atom.size -= 4;
373  } else
374  str_size = atom.size;
375 
376 #ifdef MOV_EXPORT_ALL_METADATA
377  if (!key) {
378  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
379  key = tmp_key;
380  }
381 #endif
382 
383  if (!key)
384  return 0;
385  if (atom.size < 0)
386  return AVERROR_INVALIDDATA;
387 
388  str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
389 
390  if (parse)
391  parse(c, pb, str_size, key);
392  else {
393  if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
394  mov_read_mac_string(c, pb, str_size, str, sizeof(str));
395  } else {
396  avio_read(pb, str, str_size);
397  str[str_size] = 0;
398  }
399  av_dict_set(&c->fc->metadata, key, str, 0);
400  if (*language && strcmp(language, "und")) {
401  snprintf(key2, sizeof(key2), "%s-%s", key, language);
402  av_dict_set(&c->fc->metadata, key2, str, 0);
403  }
404  }
405  av_dlog(c->fc, "lang \"%3s\" ", language);
406  av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
407  key, str, (char*)&atom.type, str_size, atom.size);
408 
409  return 0;
410 }
411 
413 {
414  int64_t start;
415  int i, nb_chapters, str_len, version;
416  char str[256+1];
417 
418  if ((atom.size -= 5) < 0)
419  return 0;
420 
421  version = avio_r8(pb);
422  avio_rb24(pb);
423  if (version)
424  avio_rb32(pb); // ???
425  nb_chapters = avio_r8(pb);
426 
427  for (i = 0; i < nb_chapters; i++) {
428  if (atom.size < 9)
429  return 0;
430 
431  start = avio_rb64(pb);
432  str_len = avio_r8(pb);
433 
434  if ((atom.size -= 9+str_len) < 0)
435  return 0;
436 
437  avio_read(pb, str, str_len);
438  str[str_len] = 0;
439  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
440  }
441  return 0;
442 }
443 
444 #define MIN_DATA_ENTRY_BOX_SIZE 12
446 {
447  AVStream *st;
448  MOVStreamContext *sc;
449  int entries, i, j;
450 
451  if (c->fc->nb_streams < 1)
452  return 0;
453  st = c->fc->streams[c->fc->nb_streams-1];
454  sc = st->priv_data;
455 
456  avio_rb32(pb); // version + flags
457  entries = avio_rb32(pb);
458  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
459  entries >= UINT_MAX / sizeof(*sc->drefs))
460  return AVERROR_INVALIDDATA;
461  av_free(sc->drefs);
462  sc->drefs_count = 0;
463  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
464  if (!sc->drefs)
465  return AVERROR(ENOMEM);
466  sc->drefs_count = entries;
467 
468  for (i = 0; i < sc->drefs_count; i++) {
469  MOVDref *dref = &sc->drefs[i];
470  uint32_t size = avio_rb32(pb);
471  int64_t next = avio_tell(pb) + size - 4;
472 
473  if (size < 12)
474  return AVERROR_INVALIDDATA;
475 
476  dref->type = avio_rl32(pb);
477  avio_rb32(pb); // version + flags
478  av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
479 
480  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
481  /* macintosh alias record */
482  uint16_t volume_len, len;
483  int16_t type;
484 
485  avio_skip(pb, 10);
486 
487  volume_len = avio_r8(pb);
488  volume_len = FFMIN(volume_len, 27);
489  avio_read(pb, dref->volume, 27);
490  dref->volume[volume_len] = 0;
491  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
492 
493  avio_skip(pb, 12);
494 
495  len = avio_r8(pb);
496  len = FFMIN(len, 63);
497  avio_read(pb, dref->filename, 63);
498  dref->filename[len] = 0;
499  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
500 
501  avio_skip(pb, 16);
502 
503  /* read next level up_from_alias/down_to_target */
504  dref->nlvl_from = avio_rb16(pb);
505  dref->nlvl_to = avio_rb16(pb);
506  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
507  dref->nlvl_from, dref->nlvl_to);
508 
509  avio_skip(pb, 16);
510 
511  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
512  if(url_feof(pb))
513  return AVERROR_EOF;
514  type = avio_rb16(pb);
515  len = avio_rb16(pb);
516  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
517  if (len&1)
518  len += 1;
519  if (type == 2) { // absolute path
520  av_free(dref->path);
521  dref->path = av_mallocz(len+1);
522  if (!dref->path)
523  return AVERROR(ENOMEM);
524  avio_read(pb, dref->path, len);
525  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
526  len -= volume_len;
527  memmove(dref->path, dref->path+volume_len, len);
528  dref->path[len] = 0;
529  }
530  for (j = 0; j < len; j++)
531  if (dref->path[j] == ':')
532  dref->path[j] = '/';
533  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
534  } else if (type == 0) { // directory name
535  av_free(dref->dir);
536  dref->dir = av_malloc(len+1);
537  if (!dref->dir)
538  return AVERROR(ENOMEM);
539  avio_read(pb, dref->dir, len);
540  dref->dir[len] = 0;
541  for (j = 0; j < len; j++)
542  if (dref->dir[j] == ':')
543  dref->dir[j] = '/';
544  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
545  } else
546  avio_skip(pb, len);
547  }
548  }
549  avio_seek(pb, next, SEEK_SET);
550  }
551  return 0;
552 }
553 
555 {
556  AVStream *st;
557  uint32_t type;
558  uint32_t av_unused ctype;
559  int title_size;
560  char *title_str;
561 
562  if (c->fc->nb_streams < 1) // meta before first trak
563  return 0;
564 
565  st = c->fc->streams[c->fc->nb_streams-1];
566 
567  avio_r8(pb); /* version */
568  avio_rb24(pb); /* flags */
569 
570  /* component type */
571  ctype = avio_rl32(pb);
572  type = avio_rl32(pb); /* component subtype */
573 
574  av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
575  av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
576 
577  if (type == MKTAG('v','i','d','e'))
579  else if (type == MKTAG('s','o','u','n'))
581  else if (type == MKTAG('m','1','a',' '))
583  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
585 
586  avio_rb32(pb); /* component manufacture */
587  avio_rb32(pb); /* component flags */
588  avio_rb32(pb); /* component flags mask */
589 
590  title_size = atom.size - 24;
591  if (title_size > 0) {
592  title_str = av_malloc(title_size + 1); /* Add null terminator */
593  if (!title_str)
594  return AVERROR(ENOMEM);
595  avio_read(pb, title_str, title_size);
596  title_str[title_size] = 0;
597  if (title_str[0])
598  av_dict_set(&st->metadata, "handler_name", title_str +
599  (!c->isom && title_str[0] == title_size - 1), 0);
600  av_freep(&title_str);
601  }
602 
603  return 0;
604 }
605 
607 {
608  AVStream *st;
609  int tag;
610 
611  if (fc->nb_streams < 1)
612  return 0;
613  st = fc->streams[fc->nb_streams-1];
614 
615  avio_rb32(pb); /* version + flags */
616  ff_mp4_read_descr(fc, pb, &tag);
617  if (tag == MP4ESDescrTag) {
618  ff_mp4_parse_es_descr(pb, NULL);
619  } else
620  avio_rb16(pb); /* ID */
621 
622  ff_mp4_read_descr(fc, pb, &tag);
623  if (tag == MP4DecConfigDescrTag)
624  ff_mp4_read_dec_config_descr(fc, st, pb);
625  return 0;
626 }
627 
629 {
630  return ff_mov_read_esds(c->fc, pb, atom);
631 }
632 
634 {
635  AVStream *st;
636  int ac3info, acmod, lfeon, bsmod;
637 
638  if (c->fc->nb_streams < 1)
639  return 0;
640  st = c->fc->streams[c->fc->nb_streams-1];
641 
642  ac3info = avio_rb24(pb);
643  bsmod = (ac3info >> 14) & 0x7;
644  acmod = (ac3info >> 11) & 0x7;
645  lfeon = (ac3info >> 10) & 0x1;
646  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
648  if (lfeon)
650  st->codec->audio_service_type = bsmod;
651  if (st->codec->channels > 1 && bsmod == 0x7)
653 
654  return 0;
655 }
656 
658 {
659  AVStream *st;
660  int eac3info, acmod, lfeon, bsmod;
661 
662  if (c->fc->nb_streams < 1)
663  return 0;
664  st = c->fc->streams[c->fc->nb_streams-1];
665 
666  /* No need to parse fields for additional independent substreams and its
667  * associated dependent substreams since libavcodec's E-AC-3 decoder
668  * does not support them yet. */
669  avio_rb16(pb); /* data_rate and num_ind_sub */
670  eac3info = avio_rb24(pb);
671  bsmod = (eac3info >> 12) & 0x1f;
672  acmod = (eac3info >> 9) & 0x7;
673  lfeon = (eac3info >> 8) & 0x1;
675  if (lfeon)
678  st->codec->audio_service_type = bsmod;
679  if (st->codec->channels > 1 && bsmod == 0x7)
681 
682  return 0;
683 }
684 
686 {
687  AVStream *st;
688 
689  if (c->fc->nb_streams < 1)
690  return 0;
691  st = c->fc->streams[c->fc->nb_streams-1];
692 
693  if (atom.size < 16)
694  return 0;
695 
696  /* skip version and flags */
697  avio_skip(pb, 4);
698 
699  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
700 
701  return 0;
702 }
703 
705 {
706  AVStream *st;
707 
708  if (c->fc->nb_streams < 1)
709  return 0;
710  st = c->fc->streams[c->fc->nb_streams-1];
711 
712  if (ff_get_wav_header(pb, st->codec, atom.size) < 0) {
713  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
714  }
715 
716  return 0;
717 }
718 
720 {
721  const int num = avio_rb32(pb);
722  const int den = avio_rb32(pb);
723  AVStream *st;
724 
725  if (c->fc->nb_streams < 1)
726  return 0;
727  st = c->fc->streams[c->fc->nb_streams-1];
728 
729  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
730  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
732  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
734  num, den);
735  } else if (den != 0) {
736  st->sample_aspect_ratio.num = num;
737  st->sample_aspect_ratio.den = den;
738  }
739  return 0;
740 }
741 
742 /* this atom contains actual media data */
744 {
745  if (atom.size == 0) /* wrong one (MP4) */
746  return 0;
747  c->found_mdat=1;
748  return 0; /* now go for moov */
749 }
750 
751 /* read major brand, minor version and compatible brands and store them as metadata */
753 {
754  uint32_t minor_ver;
755  int comp_brand_size;
756  char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
757  char* comp_brands_str;
758  uint8_t type[5] = {0};
759 
760  avio_read(pb, type, 4);
761  if (strcmp(type, "qt "))
762  c->isom = 1;
763  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
764  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
765  minor_ver = avio_rb32(pb); /* minor version */
766  snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
767  av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
768 
769  comp_brand_size = atom.size - 8;
770  if (comp_brand_size < 0)
771  return AVERROR_INVALIDDATA;
772  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
773  if (!comp_brands_str)
774  return AVERROR(ENOMEM);
775  avio_read(pb, comp_brands_str, comp_brand_size);
776  comp_brands_str[comp_brand_size] = 0;
777  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
778  av_freep(&comp_brands_str);
779 
780  return 0;
781 }
782 
783 /* this atom should contain all header atoms */
785 {
786  int ret;
787 
788  if (c->found_moov) {
789  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
790  avio_skip(pb, atom.size);
791  return 0;
792  }
793 
794  if ((ret = mov_read_default(c, pb, atom)) < 0)
795  return ret;
796  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
797  /* so we don't parse the whole file if over a network */
798  c->found_moov=1;
799  return 0; /* now go for mdat */
800 }
801 
803 {
804  c->fragment.moof_offset = avio_tell(pb) - 8;
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;
814  time_t timet;
815  if(time >= 2082844800)
816  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
817  timet = time;
818  ptm = gmtime(&timet);
819  if (!ptm) return;
820  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  unsigned mov_field_order;
947  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
948 
949  if (c->fc->nb_streams < 1) // will happen with jp2 files
950  return 0;
951  st = c->fc->streams[c->fc->nb_streams-1];
952  if (atom.size < 2)
953  return AVERROR_INVALIDDATA;
954  mov_field_order = avio_rb16(pb);
955  if ((mov_field_order & 0xFF00) == 0x0100)
956  decoded_field_order = AV_FIELD_PROGRESSIVE;
957  else if ((mov_field_order & 0xFF00) == 0x0200) {
958  switch (mov_field_order & 0xFF) {
959  case 0x01: decoded_field_order = AV_FIELD_TT;
960  break;
961  case 0x06: decoded_field_order = AV_FIELD_BB;
962  break;
963  case 0x09: decoded_field_order = AV_FIELD_TB;
964  break;
965  case 0x0E: decoded_field_order = AV_FIELD_BT;
966  break;
967  }
968  }
969  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
970  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
971  }
972  st->codec->field_order = decoded_field_order;
973 
974  return 0;
975 }
976 
977 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
979  enum AVCodecID codec_id)
980 {
981  AVStream *st;
982  uint64_t size;
983  uint8_t *buf;
984  int err;
985 
986  if (c->fc->nb_streams < 1) // will happen with jp2 files
987  return 0;
988  st= c->fc->streams[c->fc->nb_streams-1];
989 
990  if (st->codec->codec_id != codec_id)
991  return 0; /* unexpected codec_id - don't mess with extradata */
992 
993  size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
994  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
995  return AVERROR_INVALIDDATA;
996  if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
997  st->codec->extradata_size = 0;
998  return err;
999  }
1000  buf = st->codec->extradata + st->codec->extradata_size;
1002  AV_WB32( buf , atom.size + 8);
1003  AV_WL32( buf + 4, atom.type);
1004  avio_read(pb, buf + 8, atom.size);
1005  return 0;
1006 }
1007 
1008 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1010 {
1011  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1012 }
1013 
1015 {
1016  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1017 }
1018 
1020 {
1021  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1022 }
1023 
1025 {
1026  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1027 }
1028 
1030 {
1031  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1032 
1033  if (!ret && c->fc->nb_streams >= 1) {
1034  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1035  if (avctx->extradata_size >= 40) {
1036  avctx->height = AV_RB16(&avctx->extradata[36]);
1037  avctx->width = AV_RB16(&avctx->extradata[38]);
1038  }
1039  }
1040  return ret;
1041 }
1042 
1044 {
1045  if (c->fc->nb_streams >= 1) {
1046  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1047  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1048  codec->codec_id == AV_CODEC_ID_H264 &&
1049  atom.size > 11) {
1050  avio_skip(pb, 10);
1051  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1052  if (avio_rb16(pb) == 0xd4d)
1053  codec->width = 1440;
1054  return 0;
1055  }
1056  }
1057 
1058  return mov_read_avid(c, pb, atom);
1059 }
1060 
1062 {
1063  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1064 }
1065 
1067 {
1068  AVStream *st;
1069 
1070  if (c->fc->nb_streams < 1)
1071  return 0;
1072  st = c->fc->streams[c->fc->nb_streams-1];
1073 
1074  if ((uint64_t)atom.size > (1<<30))
1075  return AVERROR_INVALIDDATA;
1076 
1077  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1078  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1079  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1080  // pass all frma atom to codec, needed at least for QDMC and QDM2
1081  av_free(st->codec->extradata);
1082  if (ff_alloc_extradata(st->codec, atom.size))
1083  return AVERROR(ENOMEM);
1084  avio_read(pb, st->codec->extradata, atom.size);
1085  } else if (atom.size > 8) { /* to read frma, esds atoms */
1086  int ret;
1087  if ((ret = mov_read_default(c, pb, atom)) < 0)
1088  return ret;
1089  } else
1090  avio_skip(pb, atom.size);
1091  return 0;
1092 }
1093 
1094 /**
1095  * This function reads atom content and puts data in extradata without tag
1096  * nor size unlike mov_read_extradata.
1097  */
1099 {
1100  AVStream *st;
1101 
1102  if (c->fc->nb_streams < 1)
1103  return 0;
1104  st = c->fc->streams[c->fc->nb_streams-1];
1105 
1106  if ((uint64_t)atom.size > (1<<30))
1107  return AVERROR_INVALIDDATA;
1108 
1109  if (atom.size >= 10) {
1110  // Broken files created by legacy versions of libavformat will
1111  // wrap a whole fiel atom inside of a glbl atom.
1112  unsigned size = avio_rb32(pb);
1113  unsigned type = avio_rl32(pb);
1114  avio_seek(pb, -8, SEEK_CUR);
1115  if (type == MKTAG('f','i','e','l') && size == atom.size)
1116  return mov_read_default(c, pb, atom);
1117  }
1118  av_free(st->codec->extradata);
1119  if (ff_alloc_extradata(st->codec, atom.size))
1120  return AVERROR(ENOMEM);
1121  avio_read(pb, st->codec->extradata, atom.size);
1122  return 0;
1123 }
1124 
1126 {
1127  AVStream *st;
1128  uint8_t profile_level;
1129 
1130  if (c->fc->nb_streams < 1)
1131  return 0;
1132  st = c->fc->streams[c->fc->nb_streams-1];
1133 
1134  if (atom.size >= (1<<28) || atom.size < 7)
1135  return AVERROR_INVALIDDATA;
1136 
1137  profile_level = avio_r8(pb);
1138  if ((profile_level & 0xf0) != 0xc0)
1139  return 0;
1140 
1141  av_free(st->codec->extradata);
1142  if (ff_alloc_extradata(st->codec, atom.size - 7))
1143  return AVERROR(ENOMEM);
1144  avio_seek(pb, 6, SEEK_CUR);
1145  avio_read(pb, st->codec->extradata, st->codec->extradata_size);
1146  return 0;
1147 }
1148 
1149 /**
1150  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1151  * but can have extradata appended at the end after the 40 bytes belonging
1152  * to the struct.
1153  */
1155 {
1156  AVStream *st;
1157 
1158  if (c->fc->nb_streams < 1)
1159  return 0;
1160  if (atom.size <= 40)
1161  return 0;
1162  st = c->fc->streams[c->fc->nb_streams-1];
1163 
1164  if ((uint64_t)atom.size > (1<<30))
1165  return AVERROR_INVALIDDATA;
1166 
1167  av_free(st->codec->extradata);
1168  if (ff_alloc_extradata(st->codec, atom.size - 40))
1169  return AVERROR(ENOMEM);
1170  avio_skip(pb, 40);
1171  avio_read(pb, st->codec->extradata, atom.size - 40);
1172  return 0;
1173 }
1174 
1176 {
1177  AVStream *st;
1178  MOVStreamContext *sc;
1179  unsigned int i, entries;
1180 
1181  if (c->fc->nb_streams < 1)
1182  return 0;
1183  st = c->fc->streams[c->fc->nb_streams-1];
1184  sc = st->priv_data;
1185 
1186  avio_r8(pb); /* version */
1187  avio_rb24(pb); /* flags */
1188 
1189  entries = avio_rb32(pb);
1190 
1191  if (!entries)
1192  return 0;
1193  if (entries >= UINT_MAX/sizeof(int64_t))
1194  return AVERROR_INVALIDDATA;
1195 
1196  sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1197  if (!sc->chunk_offsets)
1198  return AVERROR(ENOMEM);
1199  sc->chunk_count = entries;
1200 
1201  if (atom.type == MKTAG('s','t','c','o'))
1202  for (i = 0; i < entries && !pb->eof_reached; i++)
1203  sc->chunk_offsets[i] = avio_rb32(pb);
1204  else if (atom.type == MKTAG('c','o','6','4'))
1205  for (i = 0; i < entries && !pb->eof_reached; i++)
1206  sc->chunk_offsets[i] = avio_rb64(pb);
1207  else
1208  return AVERROR_INVALIDDATA;
1209 
1210  sc->chunk_count = i;
1211 
1212  if (pb->eof_reached)
1213  return AVERROR_EOF;
1214 
1215  return 0;
1216 }
1217 
1218 /**
1219  * Compute codec id for 'lpcm' tag.
1220  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1221  */
1223 {
1224  /* lpcm flags:
1225  * 0x1 = float
1226  * 0x2 = big-endian
1227  * 0x4 = signed
1228  */
1229  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1230 }
1231 
1232 static int mov_codec_id(AVStream *st, uint32_t format)
1233 {
1234  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1235 
1236  if (id <= 0 &&
1237  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1238  (format & 0xFFFF) == 'T' + ('S' << 8)))
1239  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1240 
1241  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1243  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1244  /* skip old asf mpeg4 tag */
1245  format && format != MKTAG('m','p','4','s')) {
1247  if (id <= 0)
1248  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1249  if (id > 0)
1251  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1253  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1255  if (id > 0)
1257  }
1258  }
1259 
1260  st->codec->codec_tag = format;
1261 
1262  return id;
1263 }
1264 
1266  AVStream *st, MOVStreamContext *sc)
1267 {
1268  unsigned int color_depth, len, j;
1269  int color_greyscale;
1270  int color_table_id;
1271 
1272  avio_rb16(pb); /* version */
1273  avio_rb16(pb); /* revision level */
1274  avio_rb32(pb); /* vendor */
1275  avio_rb32(pb); /* temporal quality */
1276  avio_rb32(pb); /* spatial quality */
1277 
1278  st->codec->width = avio_rb16(pb); /* width */
1279  st->codec->height = avio_rb16(pb); /* height */
1280 
1281  avio_rb32(pb); /* horiz resolution */
1282  avio_rb32(pb); /* vert resolution */
1283  avio_rb32(pb); /* data size, always 0 */
1284  avio_rb16(pb); /* frames per samples */
1285 
1286  len = avio_r8(pb); /* codec name, pascal string */
1287  if (len > 31)
1288  len = 31;
1289  mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1290  if (len < 31)
1291  avio_skip(pb, 31 - len);
1292  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1293  if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1294  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1295  st->codec->width &= ~1;
1296  st->codec->height &= ~1;
1297  }
1298  /* Flash Media Server uses tag H263 with Sorenson Spark */
1299  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1300  !memcmp(st->codec->codec_name, "Sorenson H263", 13))
1302 
1303  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1304  color_table_id = avio_rb16(pb); /* colortable id */
1305  av_dlog(c->fc, "depth %d, ctab id %d\n",
1306  st->codec->bits_per_coded_sample, color_table_id);
1307  /* figure out the palette situation */
1308  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1309  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1310 
1311  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1312  if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1313  /* for palette traversal */
1314  unsigned int color_start, color_count, color_end;
1315  unsigned char a, r, g, b;
1316 
1317  if (color_greyscale) {
1318  int color_index, color_dec;
1319  /* compute the greyscale palette */
1320  st->codec->bits_per_coded_sample = color_depth;
1321  color_count = 1 << color_depth;
1322  color_index = 255;
1323  color_dec = 256 / (color_count - 1);
1324  for (j = 0; j < color_count; j++) {
1325  if (st->codec->codec_id == AV_CODEC_ID_CINEPAK){
1326  r = g = b = color_count - 1 - color_index;
1327  } else
1328  r = g = b = color_index;
1329  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1330  color_index -= color_dec;
1331  if (color_index < 0)
1332  color_index = 0;
1333  }
1334  } else if (color_table_id) {
1335  const uint8_t *color_table;
1336  /* if flag bit 3 is set, use the default palette */
1337  color_count = 1 << color_depth;
1338  if (color_depth == 2)
1339  color_table = ff_qt_default_palette_4;
1340  else if (color_depth == 4)
1341  color_table = ff_qt_default_palette_16;
1342  else
1343  color_table = ff_qt_default_palette_256;
1344 
1345  for (j = 0; j < color_count; j++) {
1346  r = color_table[j * 3 + 0];
1347  g = color_table[j * 3 + 1];
1348  b = color_table[j * 3 + 2];
1349  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1350  }
1351  } else {
1352  /* load the palette from the file */
1353  color_start = avio_rb32(pb);
1354  color_count = avio_rb16(pb);
1355  color_end = avio_rb16(pb);
1356  if ((color_start <= 255) && (color_end <= 255)) {
1357  for (j = color_start; j <= color_end; j++) {
1358  /* each A, R, G, or B component is 16 bits;
1359  * only use the top 8 bits */
1360  a = avio_r8(pb);
1361  avio_r8(pb);
1362  r = avio_r8(pb);
1363  avio_r8(pb);
1364  g = avio_r8(pb);
1365  avio_r8(pb);
1366  b = avio_r8(pb);
1367  avio_r8(pb);
1368  sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1369  }
1370  }
1371  }
1372  sc->has_palette = 1;
1373  }
1374 }
1375 
1377  AVStream *st, MOVStreamContext *sc)
1378 {
1379  int bits_per_sample, flags;
1380  uint16_t version = avio_rb16(pb);
1381  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1382 
1383  avio_rb16(pb); /* revision level */
1384  avio_rb32(pb); /* vendor */
1385 
1386  st->codec->channels = avio_rb16(pb); /* channel count */
1387  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1388  av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1389 
1390  sc->audio_cid = avio_rb16(pb);
1391  avio_rb16(pb); /* packet size = 0 */
1392 
1393  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1394 
1395  // Read QT version 1 fields. In version 0 these do not exist.
1396  av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
1397  if (!c->isom ||
1398  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1399 
1400  if (version == 1) {
1401  sc->samples_per_frame = avio_rb32(pb);
1402  avio_rb32(pb); /* bytes per packet */
1403  sc->bytes_per_frame = avio_rb32(pb);
1404  avio_rb32(pb); /* bytes per sample */
1405  } else if (version == 2) {
1406  avio_rb32(pb); /* sizeof struct only */
1408  st->codec->channels = avio_rb32(pb);
1409  avio_rb32(pb); /* always 0x7F000000 */
1411 
1412  flags = avio_rb32(pb); /* lpcm format specific flag */
1413  sc->bytes_per_frame = avio_rb32(pb);
1414  sc->samples_per_frame = avio_rb32(pb);
1415  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1416  st->codec->codec_id =
1418  flags);
1419  }
1420  }
1421 
1422  switch (st->codec->codec_id) {
1423  case AV_CODEC_ID_PCM_S8:
1424  case AV_CODEC_ID_PCM_U8:
1425  if (st->codec->bits_per_coded_sample == 16)
1427  break;
1428  case AV_CODEC_ID_PCM_S16LE:
1429  case AV_CODEC_ID_PCM_S16BE:
1430  if (st->codec->bits_per_coded_sample == 8)
1432  else if (st->codec->bits_per_coded_sample == 24)
1433  st->codec->codec_id =
1436  break;
1437  /* set values for old format before stsd version 1 appeared */
1438  case AV_CODEC_ID_MACE3:
1439  sc->samples_per_frame = 6;
1440  sc->bytes_per_frame = 2 * st->codec->channels;
1441  break;
1442  case AV_CODEC_ID_MACE6:
1443  sc->samples_per_frame = 6;
1444  sc->bytes_per_frame = 1 * st->codec->channels;
1445  break;
1447  sc->samples_per_frame = 64;
1448  sc->bytes_per_frame = 34 * st->codec->channels;
1449  break;
1450  case AV_CODEC_ID_GSM:
1451  sc->samples_per_frame = 160;
1452  sc->bytes_per_frame = 33;
1453  break;
1454  default:
1455  break;
1456  }
1457 
1458  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1459  if (bits_per_sample) {
1460  st->codec->bits_per_coded_sample = bits_per_sample;
1461  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1462  }
1463 }
1464 
1466  AVStream *st, MOVStreamContext *sc,
1467  int size)
1468 {
1469  // ttxt stsd contains display flags, justification, background
1470  // color, fonts, and default styles, so fake an atom to read it
1471  MOVAtom fake_atom = { .size = size };
1472  // mp4s contains a regular esds atom
1473  if (st->codec->codec_tag != AV_RL32("mp4s"))
1474  mov_read_glbl(c, pb, fake_atom);
1475  st->codec->width = sc->width;
1476  st->codec->height = sc->height;
1477 }
1478 
1480  AVStream *st, MOVStreamContext *sc,
1481  int size)
1482 {
1483  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1484  if (ff_alloc_extradata(st->codec, size))
1485  return AVERROR(ENOMEM);
1486  avio_read(pb, st->codec->extradata, size);
1487  if (size > 16) {
1488  MOVStreamContext *tmcd_ctx = st->priv_data;
1489  int val;
1490  val = AV_RB32(st->codec->extradata + 4);
1491  tmcd_ctx->tmcd_flags = val;
1492  if (val & 1)
1494  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1495  st->codec->time_base.num = 1;
1496  }
1497  } else {
1498  /* other codec type, just skip (rtp, mp4s ...) */
1499  avio_skip(pb, size);
1500  }
1501  return 0;
1502 }
1503 
1505  AVStream *st, MOVStreamContext *sc)
1506 {
1507  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1508  !st->codec->sample_rate && sc->time_scale > 1)
1509  st->codec->sample_rate = sc->time_scale;
1510 
1511  /* special codec parameters handling */
1512  switch (st->codec->codec_id) {
1513 #if CONFIG_DV_DEMUXER
1514  case AV_CODEC_ID_DVAUDIO:
1517  if (!c->dv_demux) {
1518  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1519  return AVERROR(ENOMEM);
1520  }
1521  sc->dv_audio_container = 1;
1523  break;
1524 #endif
1525  /* no ifdef since parameters are always those */
1526  case AV_CODEC_ID_QCELP:
1527  st->codec->channels = 1;
1528  // force sample rate for qcelp when not stored in mov
1529  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1530  st->codec->sample_rate = 8000;
1531  break;
1532  case AV_CODEC_ID_AMR_NB:
1533  st->codec->channels = 1;
1534  /* force sample rate for amr, stsd in 3gp does not store sample rate */
1535  st->codec->sample_rate = 8000;
1536  break;
1537  case AV_CODEC_ID_AMR_WB:
1538  st->codec->channels = 1;
1539  st->codec->sample_rate = 16000;
1540  break;
1541  case AV_CODEC_ID_MP2:
1542  case AV_CODEC_ID_MP3:
1543  /* force type after stsd for m1a hdlr */
1546  break;
1547  case AV_CODEC_ID_GSM:
1548  case AV_CODEC_ID_ADPCM_MS:
1550  case AV_CODEC_ID_ILBC:
1551  case AV_CODEC_ID_MACE3:
1552  case AV_CODEC_ID_MACE6:
1553  case AV_CODEC_ID_QDM2:
1554  st->codec->block_align = sc->bytes_per_frame;
1555  break;
1556  case AV_CODEC_ID_ALAC:
1557  if (st->codec->extradata_size == 36) {
1558  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1559  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1560  }
1561  break;
1562  case AV_CODEC_ID_AC3:
1564  break;
1567  break;
1568  case AV_CODEC_ID_VC1:
1570  break;
1571  default:
1572  break;
1573  }
1574  return 0;
1575 }
1576 
1578  int codec_tag, int format,
1579  int size)
1580 {
1581  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1582 
1583  if (codec_tag &&
1584  (codec_tag != format &&
1585  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1586  : codec_tag != MKTAG('j','p','e','g')))) {
1587  /* Multiple fourcc, we skip JPEG. This is not correct, we should
1588  * export it as a separate AVStream but this needs a few changes
1589  * in the MOV demuxer, patch welcome. */
1590 
1591  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1592  avio_skip(pb, size);
1593  return 1;
1594  }
1595  if ( codec_tag == AV_RL32("avc1") ||
1596  codec_tag == AV_RL32("hvc1") ||
1597  codec_tag == AV_RL32("hev1")
1598  )
1599  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
1600 
1601  return 0;
1602 }
1603 
1605 {
1606  AVStream *st;
1607  MOVStreamContext *sc;
1608  int pseudo_stream_id;
1609 
1610  if (c->fc->nb_streams < 1)
1611  return 0;
1612  st = c->fc->streams[c->fc->nb_streams-1];
1613  sc = st->priv_data;
1614 
1615  for (pseudo_stream_id = 0;
1616  pseudo_stream_id < entries && !pb->eof_reached;
1617  pseudo_stream_id++) {
1618  //Parsing Sample description table
1619  enum AVCodecID id;
1620  int ret, dref_id = 1;
1621  MOVAtom a = { AV_RL32("stsd") };
1622  int64_t start_pos = avio_tell(pb);
1623  int64_t size = avio_rb32(pb); /* size */
1624  uint32_t format = avio_rl32(pb); /* data format */
1625 
1626  if (size >= 16) {
1627  avio_rb32(pb); /* reserved */
1628  avio_rb16(pb); /* reserved */
1629  dref_id = avio_rb16(pb);
1630  }else if (size <= 7){
1631  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1632  return AVERROR_INVALIDDATA;
1633  }
1634 
1635  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1636  size - (avio_tell(pb) - start_pos)))
1637  continue;
1638 
1639  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1640  sc->dref_id= dref_id;
1641 
1642  id = mov_codec_id(st, format);
1643 
1644  av_dlog(c->fc, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1645  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1646  (format >> 24) & 0xff, st->codec->codec_type);
1647 
1648  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1649  st->codec->codec_id = id;
1650  mov_parse_stsd_video(c, pb, st, sc);
1651  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1652  st->codec->codec_id = id;
1653  mov_parse_stsd_audio(c, pb, st, sc);
1654  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1655  st->codec->codec_id = id;
1656  mov_parse_stsd_subtitle(c, pb, st, sc,
1657  size - (avio_tell(pb) - start_pos));
1658  } else {
1659  ret = mov_parse_stsd_data(c, pb, st, sc,
1660  size - (avio_tell(pb) - start_pos));
1661  if (ret < 0)
1662  return ret;
1663  }
1664  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1665  a.size = size - (avio_tell(pb) - start_pos);
1666  if (a.size > 8) {
1667  if ((ret = mov_read_default(c, pb, a)) < 0)
1668  return ret;
1669  } else if (a.size > 0)
1670  avio_skip(pb, a.size);
1671  }
1672 
1673  if (pb->eof_reached)
1674  return AVERROR_EOF;
1675 
1676  return mov_finalize_stsd_codec(c, pb, st, sc);
1677 }
1678 
1680 {
1681  int entries;
1682 
1683  avio_r8(pb); /* version */
1684  avio_rb24(pb); /* flags */
1685  entries = avio_rb32(pb);
1686 
1687  return ff_mov_read_stsd_entries(c, pb, entries);
1688 }
1689 
1691 {
1692  AVStream *st;
1693  MOVStreamContext *sc;
1694  unsigned int i, entries;
1695 
1696  if (c->fc->nb_streams < 1)
1697  return 0;
1698  st = c->fc->streams[c->fc->nb_streams-1];
1699  sc = st->priv_data;
1700 
1701  avio_r8(pb); /* version */
1702  avio_rb24(pb); /* flags */
1703 
1704  entries = avio_rb32(pb);
1705 
1706  av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1707 
1708  if (!entries)
1709  return 0;
1710  if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1711  return AVERROR_INVALIDDATA;
1712  sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1713  if (!sc->stsc_data)
1714  return AVERROR(ENOMEM);
1715 
1716  for (i = 0; i < entries && !pb->eof_reached; i++) {
1717  sc->stsc_data[i].first = avio_rb32(pb);
1718  sc->stsc_data[i].count = avio_rb32(pb);
1719  sc->stsc_data[i].id = avio_rb32(pb);
1720  }
1721 
1722  sc->stsc_count = i;
1723 
1724  if (pb->eof_reached)
1725  return AVERROR_EOF;
1726 
1727  return 0;
1728 }
1729 
1731 {
1732  AVStream *st;
1733  MOVStreamContext *sc;
1734  unsigned i, entries;
1735 
1736  if (c->fc->nb_streams < 1)
1737  return 0;
1738  st = c->fc->streams[c->fc->nb_streams-1];
1739  sc = st->priv_data;
1740 
1741  avio_rb32(pb); // version + flags
1742 
1743  entries = avio_rb32(pb);
1744  if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1745  return AVERROR_INVALIDDATA;
1746  sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1747  if (!sc->stps_data)
1748  return AVERROR(ENOMEM);
1749 
1750  for (i = 0; i < entries && !pb->eof_reached; i++) {
1751  sc->stps_data[i] = avio_rb32(pb);
1752  //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1753  }
1754 
1755  sc->stps_count = i;
1756 
1757  if (pb->eof_reached)
1758  return AVERROR_EOF;
1759 
1760  return 0;
1761 }
1762 
1764 {
1765  AVStream *st;
1766  MOVStreamContext *sc;
1767  unsigned int i, entries;
1768 
1769  if (c->fc->nb_streams < 1)
1770  return 0;
1771  st = c->fc->streams[c->fc->nb_streams-1];
1772  sc = st->priv_data;
1773 
1774  avio_r8(pb); /* version */
1775  avio_rb24(pb); /* flags */
1776 
1777  entries = avio_rb32(pb);
1778 
1779  av_dlog(c->fc, "keyframe_count = %d\n", entries);
1780 
1781  if (!entries)
1782  {
1783  sc->keyframe_absent = 1;
1784  if (!st->need_parsing)
1786  return 0;
1787  }
1788  if (entries >= UINT_MAX / sizeof(int))
1789  return AVERROR_INVALIDDATA;
1790  sc->keyframes = av_malloc(entries * sizeof(int));
1791  if (!sc->keyframes)
1792  return AVERROR(ENOMEM);
1793 
1794  for (i = 0; i < entries && !pb->eof_reached; i++) {
1795  sc->keyframes[i] = avio_rb32(pb);
1796  //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1797  }
1798 
1799  sc->keyframe_count = i;
1800 
1801  if (pb->eof_reached)
1802  return AVERROR_EOF;
1803 
1804  return 0;
1805 }
1806 
1808 {
1809  AVStream *st;
1810  MOVStreamContext *sc;
1811  unsigned int i, entries, sample_size, field_size, num_bytes;
1812  GetBitContext gb;
1813  unsigned char* buf;
1814 
1815  if (c->fc->nb_streams < 1)
1816  return 0;
1817  st = c->fc->streams[c->fc->nb_streams-1];
1818  sc = st->priv_data;
1819 
1820  avio_r8(pb); /* version */
1821  avio_rb24(pb); /* flags */
1822 
1823  if (atom.type == MKTAG('s','t','s','z')) {
1824  sample_size = avio_rb32(pb);
1825  if (!sc->sample_size) /* do not overwrite value computed in stsd */
1826  sc->sample_size = sample_size;
1827  sc->stsz_sample_size = sample_size;
1828  field_size = 32;
1829  } else {
1830  sample_size = 0;
1831  avio_rb24(pb); /* reserved */
1832  field_size = avio_r8(pb);
1833  }
1834  entries = avio_rb32(pb);
1835 
1836  av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1837 
1838  sc->sample_count = entries;
1839  if (sample_size)
1840  return 0;
1841 
1842  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1843  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1844  return AVERROR_INVALIDDATA;
1845  }
1846 
1847  if (!entries)
1848  return 0;
1849  if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1850  return AVERROR_INVALIDDATA;
1851  sc->sample_sizes = av_malloc(entries * sizeof(int));
1852  if (!sc->sample_sizes)
1853  return AVERROR(ENOMEM);
1854 
1855  num_bytes = (entries*field_size+4)>>3;
1856 
1857  buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1858  if (!buf) {
1859  av_freep(&sc->sample_sizes);
1860  return AVERROR(ENOMEM);
1861  }
1862 
1863  if (avio_read(pb, buf, num_bytes) < num_bytes) {
1864  av_freep(&sc->sample_sizes);
1865  av_free(buf);
1866  return AVERROR_INVALIDDATA;
1867  }
1868 
1869  init_get_bits(&gb, buf, 8*num_bytes);
1870 
1871  for (i = 0; i < entries && !pb->eof_reached; i++) {
1872  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1873  sc->data_size += sc->sample_sizes[i];
1874  }
1875 
1876  sc->sample_count = i;
1877 
1878  if (pb->eof_reached)
1879  return AVERROR_EOF;
1880 
1881  av_free(buf);
1882  return 0;
1883 }
1884 
1886 {
1887  AVStream *st;
1888  MOVStreamContext *sc;
1889  unsigned int i, entries;
1890  int64_t duration=0;
1891  int64_t total_sample_count=0;
1892 
1893  if (c->fc->nb_streams < 1)
1894  return 0;
1895  st = c->fc->streams[c->fc->nb_streams-1];
1896  sc = st->priv_data;
1897 
1898  avio_r8(pb); /* version */
1899  avio_rb24(pb); /* flags */
1900  entries = avio_rb32(pb);
1901 
1902  av_dlog(c->fc, "track[%i].stts.entries = %i\n",
1903  c->fc->nb_streams-1, entries);
1904 
1905  if (entries >= UINT_MAX / sizeof(*sc->stts_data))
1906  return -1;
1907 
1908  sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1909  if (!sc->stts_data)
1910  return AVERROR(ENOMEM);
1911 
1912  for (i = 0; i < entries && !pb->eof_reached; i++) {
1913  int sample_duration;
1914  int sample_count;
1915 
1916  sample_count=avio_rb32(pb);
1917  sample_duration = avio_rb32(pb);
1918 
1919  /* sample_duration < 0 is invalid based on the spec */
1920  if (sample_duration < 0) {
1921  av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta in STTS %d\n", sample_duration);
1922  sample_duration = 1;
1923  }
1924  if (sample_count < 0) {
1925  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
1926  return AVERROR_INVALIDDATA;
1927  }
1928  sc->stts_data[i].count= sample_count;
1929  sc->stts_data[i].duration= sample_duration;
1930 
1931  av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
1932  sample_count, sample_duration);
1933 
1934  duration+=(int64_t)sample_duration*sample_count;
1935  total_sample_count+=sample_count;
1936  }
1937 
1938  sc->stts_count = i;
1939 
1940  if (pb->eof_reached)
1941  return AVERROR_EOF;
1942 
1943  st->nb_frames= total_sample_count;
1944  if (duration)
1945  st->duration= duration;
1946  sc->track_end = duration;
1947  return 0;
1948 }
1949 
1951 {
1952  if (duration < 0) {
1953  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1954  }
1955 }
1956 
1958 {
1959  AVStream *st;
1960  MOVStreamContext *sc;
1961  unsigned int i, entries;
1962 
1963  if (c->fc->nb_streams < 1)
1964  return 0;
1965  st = c->fc->streams[c->fc->nb_streams-1];
1966  sc = st->priv_data;
1967 
1968  avio_r8(pb); /* version */
1969  avio_rb24(pb); /* flags */
1970  entries = avio_rb32(pb);
1971 
1972  av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1973 
1974  if (!entries)
1975  return 0;
1976  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
1977  return AVERROR_INVALIDDATA;
1978  sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1979  if (!sc->ctts_data)
1980  return AVERROR(ENOMEM);
1981 
1982  for (i = 0; i < entries && !pb->eof_reached; i++) {
1983  int count =avio_rb32(pb);
1984  int duration =avio_rb32(pb);
1985 
1986  sc->ctts_data[i].count = count;
1987  sc->ctts_data[i].duration= duration;
1988 
1989  av_dlog(c->fc, "count=%d, duration=%d\n",
1990  count, duration);
1991 
1992  if (FFABS(duration) > (1<<28) && i+2<entries) {
1993  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
1994  av_freep(&sc->ctts_data);
1995  sc->ctts_count = 0;
1996  return 0;
1997  }
1998 
1999  if (i+2<entries)
2000  mov_update_dts_shift(sc, duration);
2001  }
2002 
2003  sc->ctts_count = i;
2004 
2005  if (pb->eof_reached)
2006  return AVERROR_EOF;
2007 
2008  av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
2009 
2010  return 0;
2011 }
2012 
2014 {
2015  AVStream *st;
2016  MOVStreamContext *sc;
2017  unsigned int i, entries;
2018  uint8_t version;
2019  uint32_t grouping_type;
2020 
2021  if (c->fc->nb_streams < 1)
2022  return 0;
2023  st = c->fc->streams[c->fc->nb_streams-1];
2024  sc = st->priv_data;
2025 
2026  version = avio_r8(pb); /* version */
2027  avio_rb24(pb); /* flags */
2028  grouping_type = avio_rl32(pb);
2029  if (grouping_type != MKTAG( 'r','a','p',' '))
2030  return 0; /* only support 'rap ' grouping */
2031  if (version == 1)
2032  avio_rb32(pb); /* grouping_type_parameter */
2033 
2034  entries = avio_rb32(pb);
2035  if (!entries)
2036  return 0;
2037  if (entries >= UINT_MAX / sizeof(*sc->rap_group))
2038  return AVERROR_INVALIDDATA;
2039  sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
2040  if (!sc->rap_group)
2041  return AVERROR(ENOMEM);
2042 
2043  for (i = 0; i < entries && !pb->eof_reached; i++) {
2044  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2045  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2046  }
2047 
2048  sc->rap_group_count = i;
2049 
2050  return pb->eof_reached ? AVERROR_EOF : 0;
2051 }
2052 
2053 static void mov_build_index(MOVContext *mov, AVStream *st)
2054 {
2055  MOVStreamContext *sc = st->priv_data;
2056  int64_t current_offset;
2057  int64_t current_dts = 0;
2058  unsigned int stts_index = 0;
2059  unsigned int stsc_index = 0;
2060  unsigned int stss_index = 0;
2061  unsigned int stps_index = 0;
2062  unsigned int i, j;
2063  uint64_t stream_size = 0;
2064 
2065  /* adjust first dts according to edit list */
2066  if ((sc->empty_duration || sc->start_time) && mov->time_scale > 0) {
2067  if (sc->empty_duration)
2069  sc->time_offset = sc->start_time - sc->empty_duration;
2070  current_dts = -sc->time_offset;
2071  if (sc->ctts_count>0 && sc->stts_count>0 &&
2072  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2073  /* more than 16 frames delay, dts are likely wrong
2074  this happens with files created by iMovie */
2075  sc->wrong_dts = 1;
2076  st->codec->has_b_frames = 1;
2077  }
2078  }
2079 
2080  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2081  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2082  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2083  unsigned int current_sample = 0;
2084  unsigned int stts_sample = 0;
2085  unsigned int sample_size;
2086  unsigned int distance = 0;
2087  unsigned int rap_group_index = 0;
2088  unsigned int rap_group_sample = 0;
2089  int rap_group_present = sc->rap_group_count && sc->rap_group;
2090  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2091 
2092  current_dts -= sc->dts_shift;
2093 
2094  if (!sc->sample_count || st->nb_index_entries)
2095  return;
2096  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2097  return;
2099  st->nb_index_entries + sc->sample_count,
2100  sizeof(*st->index_entries)) < 0) {
2101  st->nb_index_entries = 0;
2102  return;
2103  }
2105 
2106  for (i = 0; i < sc->chunk_count; i++) {
2107  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2108  current_offset = sc->chunk_offsets[i];
2109  while (stsc_index + 1 < sc->stsc_count &&
2110  i + 1 == sc->stsc_data[stsc_index + 1].first)
2111  stsc_index++;
2112 
2113  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2114  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2115  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2116  sc->stsz_sample_size = sc->sample_size;
2117  }
2118  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2119  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2120  sc->stsz_sample_size = sc->sample_size;
2121  }
2122 
2123  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2124  int keyframe = 0;
2125  if (current_sample >= sc->sample_count) {
2126  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2127  return;
2128  }
2129 
2130  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2131  keyframe = 1;
2132  if (stss_index + 1 < sc->keyframe_count)
2133  stss_index++;
2134  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2135  keyframe = 1;
2136  if (stps_index + 1 < sc->stps_count)
2137  stps_index++;
2138  }
2139  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2140  if (sc->rap_group[rap_group_index].index > 0)
2141  keyframe = 1;
2142  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2143  rap_group_sample = 0;
2144  rap_group_index++;
2145  }
2146  }
2147  if (keyframe)
2148  distance = 0;
2149  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2150  if (sc->pseudo_stream_id == -1 ||
2151  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2152  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2153  e->pos = current_offset;
2154  e->timestamp = current_dts;
2155  e->size = sample_size;
2156  e->min_distance = distance;
2157  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2158  av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2159  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2160  current_offset, current_dts, sample_size, distance, keyframe);
2161  }
2162 
2163  current_offset += sample_size;
2164  stream_size += sample_size;
2165  current_dts += sc->stts_data[stts_index].duration;
2166  distance++;
2167  stts_sample++;
2168  current_sample++;
2169  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2170  stts_sample = 0;
2171  stts_index++;
2172  }
2173  }
2174  }
2175  if (st->duration > 0)
2176  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2177  } else {
2178  unsigned chunk_samples, total = 0;
2179 
2180  // compute total chunk count
2181  for (i = 0; i < sc->stsc_count; i++) {
2182  unsigned count, chunk_count;
2183 
2184  chunk_samples = sc->stsc_data[i].count;
2185  if (i != sc->stsc_count - 1 &&
2186  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2187  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2188  return;
2189  }
2190 
2191  if (sc->samples_per_frame >= 160) { // gsm
2192  count = chunk_samples / sc->samples_per_frame;
2193  } else if (sc->samples_per_frame > 1) {
2194  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2195  count = (chunk_samples+samples-1) / samples;
2196  } else {
2197  count = (chunk_samples+1023) / 1024;
2198  }
2199 
2200  if (i < sc->stsc_count - 1)
2201  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2202  else
2203  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2204  total += chunk_count * count;
2205  }
2206 
2207  av_dlog(mov->fc, "chunk count %d\n", total);
2208  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2209  return;
2211  st->nb_index_entries + total,
2212  sizeof(*st->index_entries)) < 0) {
2213  st->nb_index_entries = 0;
2214  return;
2215  }
2216  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2217 
2218  // populate index
2219  for (i = 0; i < sc->chunk_count; i++) {
2220  current_offset = sc->chunk_offsets[i];
2221  if (stsc_index + 1 < sc->stsc_count &&
2222  i + 1 == sc->stsc_data[stsc_index + 1].first)
2223  stsc_index++;
2224  chunk_samples = sc->stsc_data[stsc_index].count;
2225 
2226  while (chunk_samples > 0) {
2227  AVIndexEntry *e;
2228  unsigned size, samples;
2229 
2230  if (sc->samples_per_frame >= 160) { // gsm
2231  samples = sc->samples_per_frame;
2232  size = sc->bytes_per_frame;
2233  } else {
2234  if (sc->samples_per_frame > 1) {
2235  samples = FFMIN((1024 / sc->samples_per_frame)*
2236  sc->samples_per_frame, chunk_samples);
2237  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2238  } else {
2239  samples = FFMIN(1024, chunk_samples);
2240  size = samples * sc->sample_size;
2241  }
2242  }
2243 
2244  if (st->nb_index_entries >= total) {
2245  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2246  return;
2247  }
2248  e = &st->index_entries[st->nb_index_entries++];
2249  e->pos = current_offset;
2250  e->timestamp = current_dts;
2251  e->size = size;
2252  e->min_distance = 0;
2253  e->flags = AVINDEX_KEYFRAME;
2254  av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2255  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2256  size, samples);
2257 
2258  current_offset += size;
2259  current_dts += samples;
2260  chunk_samples -= samples;
2261  }
2262  }
2263  }
2264 }
2265 
2266 static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
2267  AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
2268 {
2269  /* try relative path, we do not try the absolute because it can leak information about our
2270  system to an attacker */
2271  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2272  char filename[1024];
2273  const char *src_path;
2274  int i, l;
2275 
2276  /* find a source dir */
2277  src_path = strrchr(src, '/');
2278  if (src_path)
2279  src_path++;
2280  else
2281  src_path = src;
2282 
2283  /* find a next level down to target */
2284  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2285  if (ref->path[l] == '/') {
2286  if (i == ref->nlvl_to - 1)
2287  break;
2288  else
2289  i++;
2290  }
2291 
2292  /* compose filename if next level down to target was found */
2293  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2294  memcpy(filename, src, src_path - src);
2295  filename[src_path - src] = 0;
2296 
2297  for (i = 1; i < ref->nlvl_from; i++)
2298  av_strlcat(filename, "../", 1024);
2299 
2300  av_strlcat(filename, ref->path + l + 1, 1024);
2301 
2302  if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2303  return 0;
2304  }
2305  } else if (use_absolute_path) {
2306  av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
2307  "this is a possible security issue\n");
2308  if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2309  return 0;
2310  }
2311 
2312  return AVERROR(ENOENT);
2313 }
2314 
2316 {
2317  if (sc->time_scale <= 0) {
2318  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2319  sc->time_scale = c->time_scale;
2320  if (sc->time_scale <= 0)
2321  sc->time_scale = 1;
2322  }
2323 }
2324 
2326 {
2327  AVStream *st;
2328  MOVStreamContext *sc;
2329  int ret;
2330 
2331  st = avformat_new_stream(c->fc, NULL);
2332  if (!st) return AVERROR(ENOMEM);
2333  st->id = c->fc->nb_streams;
2334  sc = av_mallocz(sizeof(MOVStreamContext));
2335  if (!sc) return AVERROR(ENOMEM);
2336 
2337  st->priv_data = sc;
2339  sc->ffindex = st->index;
2340 
2341  if ((ret = mov_read_default(c, pb, atom)) < 0)
2342  return ret;
2343 
2344  /* sanity checks */
2345  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2346  (!sc->sample_size && !sc->sample_count))) {
2347  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2348  st->index);
2349  return 0;
2350  }
2351 
2352  fix_timescale(c, sc);
2353 
2354  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2355 
2356  mov_build_index(c, st);
2357 
2358  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2359  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2360  if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
2361  c->use_absolute_path, c->fc) < 0)
2362  av_log(c->fc, AV_LOG_ERROR,
2363  "stream %d, error opening alias: path='%s', dir='%s', "
2364  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2365  st->index, dref->path, dref->dir, dref->filename,
2366  dref->volume, dref->nlvl_from, dref->nlvl_to);
2367  } else {
2368  sc->pb = c->fc->pb;
2369  sc->pb_is_copied = 1;
2370  }
2371 
2372  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2373  if (!st->sample_aspect_ratio.num &&
2374  (st->codec->width != sc->width || st->codec->height != sc->height)) {
2375  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2376  ((double)st->codec->width * sc->height), INT_MAX);
2377  }
2378 
2379  if (st->duration > 0)
2381  sc->time_scale*st->nb_frames, st->duration, INT_MAX);
2382 
2383 #if FF_API_R_FRAME_RATE
2384  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2386  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2387 #endif
2388  }
2389 
2390  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2391  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2392  st->codec->codec_tag != MKTAG('a', 'v', 'c', '1')) {
2394  }
2395 
2396  switch (st->codec->codec_id) {
2397 #if CONFIG_H261_DECODER
2398  case AV_CODEC_ID_H261:
2399 #endif
2400 #if CONFIG_H263_DECODER
2401  case AV_CODEC_ID_H263:
2402 #endif
2403 #if CONFIG_MPEG4_DECODER
2404  case AV_CODEC_ID_MPEG4:
2405 #endif
2406  st->codec->width = 0; /* let decoder init width/height */
2407  st->codec->height= 0;
2408  break;
2409  }
2410 
2411  /* Do not need those anymore. */
2412  av_freep(&sc->chunk_offsets);
2413  av_freep(&sc->stsc_data);
2414  av_freep(&sc->sample_sizes);
2415  av_freep(&sc->keyframes);
2416  av_freep(&sc->stts_data);
2417  av_freep(&sc->stps_data);
2418  av_freep(&sc->rap_group);
2419 
2420  return 0;
2421 }
2422 
2424 {
2425  int ret;
2426  c->itunes_metadata = 1;
2427  ret = mov_read_default(c, pb, atom);
2428  c->itunes_metadata = 0;
2429  return ret;
2430 }
2431 
2433 {
2434  while (atom.size > 8) {
2435  uint32_t tag = avio_rl32(pb);
2436  atom.size -= 4;
2437  if (tag == MKTAG('h','d','l','r')) {
2438  avio_seek(pb, -8, SEEK_CUR);
2439  atom.size += 8;
2440  return mov_read_default(c, pb, atom);
2441  }
2442  }
2443  return 0;
2444 }
2445 
2447 {
2448  int i;
2449  int width;
2450  int height;
2451  int64_t disp_transform[2];
2452  int display_matrix[3][2];
2453  AVStream *st;
2454  MOVStreamContext *sc;
2455  int version;
2456  int flags;
2457 
2458  if (c->fc->nb_streams < 1)
2459  return 0;
2460  st = c->fc->streams[c->fc->nb_streams-1];
2461  sc = st->priv_data;
2462 
2463  version = avio_r8(pb);
2464  flags = avio_rb24(pb);
2466 
2467  if (version == 1) {
2468  avio_rb64(pb);
2469  avio_rb64(pb);
2470  } else {
2471  avio_rb32(pb); /* creation time */
2472  avio_rb32(pb); /* modification time */
2473  }
2474  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2475  avio_rb32(pb); /* reserved */
2476 
2477  /* highlevel (considering edits) duration in movie timebase */
2478  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2479  avio_rb32(pb); /* reserved */
2480  avio_rb32(pb); /* reserved */
2481 
2482  avio_rb16(pb); /* layer */
2483  avio_rb16(pb); /* alternate group */
2484  avio_rb16(pb); /* volume */
2485  avio_rb16(pb); /* reserved */
2486 
2487  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2488  // they're kept in fixed point format through all calculations
2489  // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
2490  for (i = 0; i < 3; i++) {
2491  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2492  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2493  avio_rb32(pb); // 2.30 fixed point (not used)
2494  }
2495 
2496  width = avio_rb32(pb); // 16.16 fixed point track width
2497  height = avio_rb32(pb); // 16.16 fixed point track height
2498  sc->width = width >> 16;
2499  sc->height = height >> 16;
2500 
2501  //Assign clockwise rotate values based on transform matrix so that
2502  //we can compensate for iPhone orientation during capture.
2503 
2504  if (display_matrix[1][0] == -65536 && display_matrix[0][1] == 65536) {
2505  av_dict_set(&st->metadata, "rotate", "90", 0);
2506  }
2507 
2508  if (display_matrix[0][0] == -65536 && display_matrix[1][1] == -65536) {
2509  av_dict_set(&st->metadata, "rotate", "180", 0);
2510  }
2511 
2512  if (display_matrix[1][0] == 65536 && display_matrix[0][1] == -65536) {
2513  av_dict_set(&st->metadata, "rotate", "270", 0);
2514  }
2515 
2516  // transform the display width/height according to the matrix
2517  // skip this if the display matrix is the default identity matrix
2518  // or if it is rotating the picture, ex iPhone 3GS
2519  // to keep the same scale, use [width height 1<<16]
2520  if (width && height &&
2521  ((display_matrix[0][0] != 65536 ||
2522  display_matrix[1][1] != 65536) &&
2523  !display_matrix[0][1] &&
2524  !display_matrix[1][0] &&
2525  !display_matrix[2][0] && !display_matrix[2][1])) {
2526  for (i = 0; i < 2; i++)
2527  disp_transform[i] =
2528  (int64_t) width * display_matrix[0][i] +
2529  (int64_t) height * display_matrix[1][i] +
2530  ((int64_t) display_matrix[2][i] << 16);
2531 
2532  //sample aspect ratio is new width/height divided by old width/height
2534  ((double) disp_transform[0] * height) /
2535  ((double) disp_transform[1] * width), INT_MAX);
2536  }
2537  return 0;
2538 }
2539 
2541 {
2542  MOVFragment *frag = &c->fragment;
2543  MOVTrackExt *trex = NULL;
2544  int flags, track_id, i;
2545 
2546  avio_r8(pb); /* version */
2547  flags = avio_rb24(pb);
2548 
2549  track_id = avio_rb32(pb);
2550  if (!track_id)
2551  return AVERROR_INVALIDDATA;
2552  frag->track_id = track_id;
2553  for (i = 0; i < c->trex_count; i++)
2554  if (c->trex_data[i].track_id == frag->track_id) {
2555  trex = &c->trex_data[i];
2556  break;
2557  }
2558  if (!trex) {
2559  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2560  return AVERROR_INVALIDDATA;
2561  }
2562 
2564  avio_rb64(pb) : frag->moof_offset;
2565  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2566 
2567  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2568  avio_rb32(pb) : trex->duration;
2569  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2570  avio_rb32(pb) : trex->size;
2571  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2572  avio_rb32(pb) : trex->flags;
2573  av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2574  return 0;
2575 }
2576 
2578 {
2579  c->chapter_track = avio_rb32(pb);
2580  return 0;
2581 }
2582 
2584 {
2585  MOVTrackExt *trex;
2586  int err;
2587 
2588  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2589  return AVERROR_INVALIDDATA;
2590  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2591  sizeof(*c->trex_data))) < 0) {
2592  c->trex_count = 0;
2593  return err;
2594  }
2595 
2596  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
2597 
2598  trex = &c->trex_data[c->trex_count++];
2599  avio_r8(pb); /* version */
2600  avio_rb24(pb); /* flags */
2601  trex->track_id = avio_rb32(pb);
2602  trex->stsd_id = avio_rb32(pb);
2603  trex->duration = avio_rb32(pb);
2604  trex->size = avio_rb32(pb);
2605  trex->flags = avio_rb32(pb);
2606  return 0;
2607 }
2608 
2610 {
2611  MOVFragment *frag = &c->fragment;
2612  AVStream *st = NULL;
2613  MOVStreamContext *sc;
2614  MOVStts *ctts_data;
2615  uint64_t offset;
2616  int64_t dts;
2617  int data_offset = 0;
2618  unsigned entries, first_sample_flags = frag->flags;
2619  int flags, distance, i, found_keyframe = 0, err;
2620 
2621  for (i = 0; i < c->fc->nb_streams; i++) {
2622  if (c->fc->streams[i]->id == frag->track_id) {
2623  st = c->fc->streams[i];
2624  break;
2625  }
2626  }
2627  if (!st) {
2628  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2629  return AVERROR_INVALIDDATA;
2630  }
2631  sc = st->priv_data;
2632  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
2633  return 0;
2634  avio_r8(pb); /* version */
2635  flags = avio_rb24(pb);
2636  entries = avio_rb32(pb);
2637  av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2638 
2639  /* Always assume the presence of composition time offsets.
2640  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2641  * 1) in the initial movie, there are no samples.
2642  * 2) in the first movie fragment, there is only one sample without composition time offset.
2643  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2644  if (!sc->ctts_count && sc->sample_count)
2645  {
2646  /* Complement ctts table if moov atom doesn't have ctts atom. */
2647  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
2648  if (!ctts_data)
2649  return AVERROR(ENOMEM);
2650  sc->ctts_data = ctts_data;
2651  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
2652  sc->ctts_data[sc->ctts_count].duration = 0;
2653  sc->ctts_count++;
2654  }
2655  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2656  return AVERROR_INVALIDDATA;
2657  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
2658  sizeof(*sc->ctts_data))) < 0) {
2659  sc->ctts_count = 0;
2660  return err;
2661  }
2662  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
2663  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
2664  dts = sc->track_end - sc->time_offset;
2665  offset = frag->base_data_offset + data_offset;
2666  distance = 0;
2667  av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2668  for (i = 0; i < entries && !pb->eof_reached; i++) {
2669  unsigned sample_size = frag->size;
2670  int sample_flags = i ? frag->flags : first_sample_flags;
2671  unsigned sample_duration = frag->duration;
2672  int keyframe = 0;
2673 
2674  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
2675  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
2676  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
2677  sc->ctts_data[sc->ctts_count].count = 1;
2678  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
2679  avio_rb32(pb) : 0;
2681  sc->ctts_count++;
2682  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2683  keyframe = 1;
2684  else if (!found_keyframe)
2685  keyframe = found_keyframe =
2686  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
2688  if (keyframe)
2689  distance = 0;
2690  av_add_index_entry(st, offset, dts, sample_size, distance,
2691  keyframe ? AVINDEX_KEYFRAME : 0);
2692  av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2693  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2694  offset, dts, sample_size, distance, keyframe);
2695  distance++;
2696  dts += sample_duration;
2697  offset += sample_size;
2698  sc->data_size += sample_size;
2699  }
2700 
2701  if (pb->eof_reached)
2702  return AVERROR_EOF;
2703 
2704  frag->moof_offset = offset;
2705  st->duration = sc->track_end = dts + sc->time_offset;
2706  return 0;
2707 }
2708 
2709 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2710 /* like the files created with Adobe Premiere 5.0, for samples see */
2711 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2713 {
2714  int err;
2715 
2716  if (atom.size < 8)
2717  return 0; /* continue */
2718  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2719  avio_skip(pb, atom.size - 4);
2720  return 0;
2721  }
2722  atom.type = avio_rl32(pb);
2723  atom.size -= 8;
2724  if (atom.type != MKTAG('m','d','a','t')) {
2725  avio_skip(pb, atom.size);
2726  return 0;
2727  }
2728  err = mov_read_mdat(c, pb, atom);
2729  return err;
2730 }
2731 
2733 {
2734 #if CONFIG_ZLIB
2735  AVIOContext ctx;
2736  uint8_t *cmov_data;
2737  uint8_t *moov_data; /* uncompressed data */
2738  long cmov_len, moov_len;
2739  int ret = -1;
2740 
2741  avio_rb32(pb); /* dcom atom */
2742  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2743  return AVERROR_INVALIDDATA;
2744  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2745  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
2746  return AVERROR_INVALIDDATA;
2747  }
2748  avio_rb32(pb); /* cmvd atom */
2749  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2750  return AVERROR_INVALIDDATA;
2751  moov_len = avio_rb32(pb); /* uncompressed size */
2752  cmov_len = atom.size - 6 * 4;
2753 
2754  cmov_data = av_malloc(cmov_len);
2755  if (!cmov_data)
2756  return AVERROR(ENOMEM);
2757  moov_data = av_malloc(moov_len);
2758  if (!moov_data) {
2759  av_free(cmov_data);
2760  return AVERROR(ENOMEM);
2761  }
2762  avio_read(pb, cmov_data, cmov_len);
2763  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2764  goto free_and_return;
2765  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2766  goto free_and_return;
2767  atom.type = MKTAG('m','o','o','v');
2768  atom.size = moov_len;
2769  ret = mov_read_default(c, &ctx, atom);
2770 free_and_return:
2771  av_free(moov_data);
2772  av_free(cmov_data);
2773  return ret;
2774 #else
2775  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2776  return AVERROR(ENOSYS);
2777 #endif
2778 }
2779 
2780 /* edit list atom */
2782 {
2783  MOVStreamContext *sc;
2784  int i, edit_count, version, edit_start_index = 0;
2785  int unsupported = 0;
2786 
2787  if (c->fc->nb_streams < 1 || c->ignore_editlist)
2788  return 0;
2789  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2790 
2791  version = avio_r8(pb); /* version */
2792  avio_rb24(pb); /* flags */
2793  edit_count = avio_rb32(pb); /* entries */
2794 
2795  if ((uint64_t)edit_count*12+8 > atom.size)
2796  return AVERROR_INVALIDDATA;
2797 
2798  av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2799  for (i=0; i<edit_count; i++){
2800  int64_t time;
2801  int64_t duration;
2802  int rate;
2803  if (version == 1) {
2804  duration = avio_rb64(pb);
2805  time = avio_rb64(pb);
2806  } else {
2807  duration = avio_rb32(pb); /* segment duration */
2808  time = (int32_t)avio_rb32(pb); /* media time */
2809  }
2810  rate = avio_rb32(pb);
2811  if (i == 0 && time == -1) {
2812  sc->empty_duration = duration;
2813  edit_start_index = 1;
2814  } else if (i == edit_start_index && time >= 0)
2815  sc->start_time = time;
2816  else
2817  unsupported = 1;
2818 
2819  av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
2820  duration, time, rate / 65536.0);
2821  }
2822 
2823  if (unsupported)
2824  av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2825  "a/v desync might occur, patch welcome\n");
2826 
2827  return 0;
2828 }
2829 
2831 {
2832  MOVStreamContext *sc;
2833 
2834  if (c->fc->nb_streams < 1)
2835  return AVERROR_INVALIDDATA;
2836  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
2837  sc->timecode_track = avio_rb32(pb);
2838  return 0;
2839 }
2840 
2842 {
2843  int ret;
2844  uint8_t uuid[16];
2845  static const uint8_t uuid_isml_manifest[] = {
2846  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
2847  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
2848  };
2849 
2850  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
2851  return AVERROR_INVALIDDATA;
2852 
2853  ret = avio_read(pb, uuid, sizeof(uuid));
2854  if (ret < 0) {
2855  return ret;
2856  } else if (ret != sizeof(uuid)) {
2857  return AVERROR_INVALIDDATA;
2858  }
2859  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
2860  uint8_t *buffer, *ptr;
2861  char *endptr;
2862  size_t len = atom.size - sizeof(uuid);
2863 
2864  if (len < 4) {
2865  return AVERROR_INVALIDDATA;
2866  }
2867  ret = avio_skip(pb, 4); // zeroes
2868  len -= 4;
2869 
2870  buffer = av_mallocz(len + 1);
2871  if (!buffer) {
2872  return AVERROR(ENOMEM);
2873  }
2874  ret = avio_read(pb, buffer, len);
2875  if (ret < 0) {
2876  av_free(buffer);
2877  return ret;
2878  } else if (ret != len) {
2879  av_free(buffer);
2880  return AVERROR_INVALIDDATA;
2881  }
2882 
2883  ptr = buffer;
2884  while ((ptr = av_stristr(ptr, "systemBitrate=\"")) != NULL) {
2885  ptr += sizeof("systemBitrate=\"") - 1;
2886  c->bitrates_count++;
2887  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
2888  if (!c->bitrates) {
2889  c->bitrates_count = 0;
2890  av_free(buffer);
2891  return AVERROR(ENOMEM);
2892  }
2893  errno = 0;
2894  ret = strtol(ptr, &endptr, 10);
2895  if (ret < 0 || errno || *endptr != '"') {
2896  c->bitrates[c->bitrates_count - 1] = 0;
2897  } else {
2898  c->bitrates[c->bitrates_count - 1] = ret;
2899  }
2900  }
2901 
2902  av_free(buffer);
2903  }
2904  return 0;
2905 }
2906 
2908 { MKTAG('A','C','L','R'), mov_read_avid },
2909 { MKTAG('A','P','R','G'), mov_read_avid },
2910 { MKTAG('A','A','L','P'), mov_read_avid },
2911 { MKTAG('A','R','E','S'), mov_read_ares },
2912 { MKTAG('a','v','s','s'), mov_read_avss },
2913 { MKTAG('c','h','p','l'), mov_read_chpl },
2914 { MKTAG('c','o','6','4'), mov_read_stco },
2915 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2916 { MKTAG('d','i','n','f'), mov_read_default },
2917 { MKTAG('d','r','e','f'), mov_read_dref },
2918 { MKTAG('e','d','t','s'), mov_read_default },
2919 { MKTAG('e','l','s','t'), mov_read_elst },
2920 { MKTAG('e','n','d','a'), mov_read_enda },
2921 { MKTAG('f','i','e','l'), mov_read_fiel },
2922 { MKTAG('f','t','y','p'), mov_read_ftyp },
2923 { MKTAG('g','l','b','l'), mov_read_glbl },
2924 { MKTAG('h','d','l','r'), mov_read_hdlr },
2925 { MKTAG('i','l','s','t'), mov_read_ilst },
2926 { MKTAG('j','p','2','h'), mov_read_jp2h },
2927 { MKTAG('m','d','a','t'), mov_read_mdat },
2928 { MKTAG('m','d','h','d'), mov_read_mdhd },
2929 { MKTAG('m','d','i','a'), mov_read_default },
2930 { MKTAG('m','e','t','a'), mov_read_meta },
2931 { MKTAG('m','i','n','f'), mov_read_default },
2932 { MKTAG('m','o','o','f'), mov_read_moof },
2933 { MKTAG('m','o','o','v'), mov_read_moov },
2934 { MKTAG('m','v','e','x'), mov_read_default },
2935 { MKTAG('m','v','h','d'), mov_read_mvhd },
2936 { MKTAG('S','M','I',' '), mov_read_svq3 },
2937 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
2938 { MKTAG('a','v','c','C'), mov_read_glbl },
2939 { MKTAG('p','a','s','p'), mov_read_pasp },
2940 { MKTAG('s','t','b','l'), mov_read_default },
2941 { MKTAG('s','t','c','o'), mov_read_stco },
2942 { MKTAG('s','t','p','s'), mov_read_stps },
2943 { MKTAG('s','t','r','f'), mov_read_strf },
2944 { MKTAG('s','t','s','c'), mov_read_stsc },
2945 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2946 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2947 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2948 { MKTAG('s','t','t','s'), mov_read_stts },
2949 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2950 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2951 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2952 { MKTAG('t','r','a','k'), mov_read_trak },
2953 { MKTAG('t','r','a','f'), mov_read_default },
2954 { MKTAG('t','r','e','f'), mov_read_default },
2955 { MKTAG('t','m','c','d'), mov_read_tmcd },
2956 { MKTAG('c','h','a','p'), mov_read_chap },
2957 { MKTAG('t','r','e','x'), mov_read_trex },
2958 { MKTAG('t','r','u','n'), mov_read_trun },
2959 { MKTAG('u','d','t','a'), mov_read_default },
2960 { MKTAG('w','a','v','e'), mov_read_wave },
2961 { MKTAG('e','s','d','s'), mov_read_esds },
2962 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2963 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
2964 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2965 { MKTAG('w','f','e','x'), mov_read_wfex },
2966 { MKTAG('c','m','o','v'), mov_read_cmov },
2967 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
2968 { MKTAG('d','v','c','1'), mov_read_dvc1 },
2969 { MKTAG('s','b','g','p'), mov_read_sbgp },
2970 { MKTAG('h','v','c','C'), mov_read_glbl },
2971 { MKTAG('u','u','i','d'), mov_read_uuid },
2972 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
2973 { 0, NULL }
2974 };
2975 
2977 {
2978  int64_t total_size = 0;
2979  MOVAtom a;
2980  int i;
2981 
2982  if (atom.size < 0)
2983  atom.size = INT64_MAX;
2984  while (total_size + 8 <= atom.size && !url_feof(pb)) {
2985  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
2986  a.size = atom.size;
2987  a.type=0;
2988  if (atom.size >= 8) {
2989  a.size = avio_rb32(pb);
2990  a.type = avio_rl32(pb);
2991  if (atom.type != MKTAG('r','o','o','t') &&
2992  atom.type != MKTAG('m','o','o','v'))
2993  {
2994  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
2995  {
2996  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
2997  avio_skip(pb, -8);
2998  return 0;
2999  }
3000  }
3001  total_size += 8;
3002  if (a.size == 1) { /* 64 bit extended size */
3003  a.size = avio_rb64(pb) - 8;
3004  total_size += 8;
3005  }
3006  }
3007  av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3008  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3009  if (a.size == 0) {
3010  a.size = atom.size - total_size + 8;
3011  }
3012  a.size -= 8;
3013  if (a.size < 0)
3014  break;
3015  a.size = FFMIN(a.size, atom.size - total_size);
3016 
3017  for (i = 0; mov_default_parse_table[i].type; i++)
3018  if (mov_default_parse_table[i].type == a.type) {
3019  parse = mov_default_parse_table[i].parse;
3020  break;
3021  }
3022 
3023  // container is user data
3024  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3025  atom.type == MKTAG('i','l','s','t')))
3027 
3028  if (!parse) { /* skip leaf atoms data */
3029  avio_skip(pb, a.size);
3030  } else {
3031  int64_t start_pos = avio_tell(pb);
3032  int64_t left;
3033  int err = parse(c, pb, a);
3034  if (err < 0)
3035  return err;
3036  if (c->found_moov && c->found_mdat &&
3037  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3038  start_pos + a.size == avio_size(pb))) {
3039  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3040  c->next_root_atom = start_pos + a.size;
3041  return 0;
3042  }
3043  left = a.size - avio_tell(pb) + start_pos;
3044  if (left > 0) /* skip garbage at atom end */
3045  avio_skip(pb, left);
3046  else if (left < 0) {
3047  av_log(c->fc, AV_LOG_WARNING,
3048  "overread end of atom '%.4s' by %"PRId64" bytes\n",
3049  (char*)&a.type, -left);
3050  avio_seek(pb, left, SEEK_CUR);
3051  }
3052  }
3053 
3054  total_size += a.size;
3055  }
3056 
3057  if (total_size < atom.size && atom.size < 0x7ffff)
3058  avio_skip(pb, atom.size - total_size);
3059 
3060  return 0;
3061 }
3062 
3063 static int mov_probe(AVProbeData *p)
3064 {
3065  int64_t offset;
3066  uint32_t tag;
3067  int score = 0;
3068  int moov_offset = -1;
3069 
3070  /* check file header */
3071  offset = 0;
3072  for (;;) {
3073  /* ignore invalid offset */
3074  if ((offset + 8) > (unsigned int)p->buf_size)
3075  break;
3076  tag = AV_RL32(p->buf + offset + 4);
3077  switch(tag) {
3078  /* check for obvious tags */
3079  case MKTAG('m','o','o','v'):
3080  moov_offset = offset + 4;
3081  case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
3082  case MKTAG('m','d','a','t'):
3083  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3084  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3085  case MKTAG('f','t','y','p'):
3086  if (AV_RB32(p->buf+offset) < 8 &&
3087  (AV_RB32(p->buf+offset) != 1 ||
3088  offset + 12 > (unsigned int)p->buf_size ||
3089  AV_RB64(p->buf+offset + 8) == 0)) {
3090  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3091  } else {
3092  score = AVPROBE_SCORE_MAX;
3093  }
3094  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3095  break;
3096  /* those are more common words, so rate then a bit less */
3097  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3098  case MKTAG('w','i','d','e'):
3099  case MKTAG('f','r','e','e'):
3100  case MKTAG('j','u','n','k'):
3101  case MKTAG('p','i','c','t'):
3102  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3103  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3104  break;
3105  case MKTAG(0x82,0x82,0x7f,0x7d):
3106  case MKTAG('s','k','i','p'):
3107  case MKTAG('u','u','i','d'):
3108  case MKTAG('p','r','f','l'):
3109  /* if we only find those cause probedata is too small at least rate them */
3110  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3111  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3112  break;
3113  default:
3114  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3115  }
3116  }
3117  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3118  /* moov atom in the header - we should make sure that this is not a
3119  * MOV-packed MPEG-PS */
3120  offset = moov_offset;
3121 
3122  while(offset < (p->buf_size - 16)){ /* Sufficient space */
3123  /* We found an actual hdlr atom */
3124  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3125  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3126  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3127  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3128  /* We found a media handler reference atom describing an
3129  * MPEG-PS-in-MOV, return a
3130  * low score to force expanding the probe window until
3131  * mpegps_probe finds what it needs */
3132  return 5;
3133  }else
3134  /* Keep looking */
3135  offset+=2;
3136  }
3137  }
3138 
3139  return score;
3140 }
3141 
3142 // must be done after parsing all trak because there's no order requirement
3144 {
3145  MOVContext *mov = s->priv_data;
3146  AVStream *st = NULL;
3147  MOVStreamContext *sc;
3148  int64_t cur_pos;
3149  int i;
3150 
3151  for (i = 0; i < s->nb_streams; i++)
3152  if (s->streams[i]->id == mov->chapter_track) {
3153  st = s->streams[i];
3154  break;
3155  }
3156  if (!st) {
3157  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3158  return;
3159  }
3160 
3161  st->discard = AVDISCARD_ALL;
3162  sc = st->priv_data;
3163  cur_pos = avio_tell(sc->pb);
3164 
3165  for (i = 0; i < st->nb_index_entries; i++) {
3166  AVIndexEntry *sample = &st->index_entries[i];
3167  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3168  uint8_t *title;
3169  uint16_t ch;
3170  int len, title_len;
3171 
3172  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3173  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3174  goto finish;
3175  }
3176 
3177  // the first two bytes are the length of the title
3178  len = avio_rb16(sc->pb);
3179  if (len > sample->size-2)
3180  continue;
3181  title_len = 2*len + 1;
3182  if (!(title = av_mallocz(title_len)))
3183  goto finish;
3184 
3185  // The samples could theoretically be in any encoding if there's an encd
3186  // atom following, but in practice are only utf-8 or utf-16, distinguished
3187  // instead by the presence of a BOM
3188  if (!len) {
3189  title[0] = 0;
3190  } else {
3191  ch = avio_rb16(sc->pb);
3192  if (ch == 0xfeff)
3193  avio_get_str16be(sc->pb, len, title, title_len);
3194  else if (ch == 0xfffe)
3195  avio_get_str16le(sc->pb, len, title, title_len);
3196  else {
3197  AV_WB16(title, ch);
3198  if (len == 1 || len == 2)
3199  title[len] = 0;
3200  else
3201  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3202  }
3203  }
3204 
3205  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3206  av_freep(&title);
3207  }
3208 finish:
3209  avio_seek(sc->pb, cur_pos, SEEK_SET);
3210 }
3211 
3213  uint32_t value, int flags)
3214 {
3215  AVTimecode tc;
3216  char buf[AV_TIMECODE_STR_SIZE];
3217  AVRational rate = {st->codec->time_base.den,
3218  st->codec->time_base.num};
3219  int ret = av_timecode_init(&tc, rate, flags, 0, s);
3220  if (ret < 0)
3221  return ret;
3222  av_dict_set(&st->metadata, "timecode",
3223  av_timecode_make_string(&tc, buf, value), 0);
3224  return 0;
3225 }
3226 
3228 {
3229  MOVStreamContext *sc = st->priv_data;
3230  int flags = 0;
3231  int64_t cur_pos = avio_tell(sc->pb);
3232  uint32_t value;
3233 
3234  if (!st->nb_index_entries)
3235  return -1;
3236 
3237  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3238  value = avio_rb32(s->pb);
3239 
3240  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3241  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3242  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3243 
3244  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3245  * not the case) and thus assume "frame number format" instead of QT one.
3246  * No sample with tmcd track can be found with a QT timecode at the moment,
3247  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3248  * format). */
3249  parse_timecode_in_framenum_format(s, st, value, flags);
3250 
3251  avio_seek(sc->pb, cur_pos, SEEK_SET);
3252  return 0;
3253 }
3254 
3256 {
3257  MOVContext *mov = s->priv_data;
3258  int i, j;
3259 
3260  for (i = 0; i < s->nb_streams; i++) {
3261  AVStream *st = s->streams[i];
3262  MOVStreamContext *sc = st->priv_data;
3263 
3264  av_freep(&sc->ctts_data);
3265  for (j = 0; j < sc->drefs_count; j++) {
3266  av_freep(&sc->drefs[j].path);
3267  av_freep(&sc->drefs[j].dir);
3268  }
3269  av_freep(&sc->drefs);
3270  if (!sc->pb_is_copied)
3271  avio_close(sc->pb);
3272  sc->pb = NULL;
3273  av_freep(&sc->chunk_offsets);
3274  av_freep(&sc->keyframes);
3275  av_freep(&sc->sample_sizes);
3276  av_freep(&sc->stps_data);
3277  av_freep(&sc->stsc_data);
3278  av_freep(&sc->stts_data);
3279  }
3280 
3281  if (mov->dv_demux) {
3282  for (i = 0; i < mov->dv_fctx->nb_streams; i++) {
3283  av_freep(&mov->dv_fctx->streams[i]->codec);
3284  av_freep(&mov->dv_fctx->streams[i]);
3285  }
3286  av_freep(&mov->dv_fctx);
3287  av_freep(&mov->dv_demux);
3288  }
3289 
3290  av_freep(&mov->trex_data);
3291  av_freep(&mov->bitrates);
3292 
3293  return 0;
3294 }
3295 
3296 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
3297 {
3298  int i;
3299 
3300  for (i = 0; i < s->nb_streams; i++) {
3301  AVStream *st = s->streams[i];
3302  MOVStreamContext *sc = st->priv_data;
3303 
3304  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3305  sc->timecode_track == tmcd_id)
3306  return 1;
3307  }
3308  return 0;
3309 }
3310 
3311 /* look for a tmcd track not referenced by any video track, and export it globally */
3313 {
3314  int i;
3315 
3316  for (i = 0; i < s->nb_streams; i++) {
3317  AVStream *st = s->streams[i];
3318 
3319  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
3320  !tmcd_is_referenced(s, i + 1)) {
3321  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
3322  if (tcr) {
3323  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
3324  break;
3325  }
3326  }
3327  }
3328 }
3329 
3331 {
3332  MOVContext *mov = s->priv_data;
3333  AVIOContext *pb = s->pb;
3334  int i, j, err;
3335  MOVAtom atom = { AV_RL32("root") };
3336 
3337  mov->fc = s;
3338  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
3339  if (pb->seekable)
3340  atom.size = avio_size(pb);
3341  else
3342  atom.size = INT64_MAX;
3343 
3344  /* check MOV header */
3345  if ((err = mov_read_default(mov, pb, atom)) < 0) {
3346  av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
3347  mov_read_close(s);
3348  return err;
3349  }
3350  if (!mov->found_moov) {
3351  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
3352  mov_read_close(s);
3353  return AVERROR_INVALIDDATA;
3354  }
3355  av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
3356 
3357  if (pb->seekable) {
3358  if (mov->chapter_track > 0)
3359  mov_read_chapters(s);
3360  for (i = 0; i < s->nb_streams; i++)
3361  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
3362  mov_read_timecode_track(s, s->streams[i]);
3363  }
3364 
3365  /* copy timecode metadata from tmcd tracks to the related video streams */
3366  for (i = 0; i < s->nb_streams; i++) {
3367  AVStream *st = s->streams[i];
3368  MOVStreamContext *sc = st->priv_data;
3369  if (sc->timecode_track > 0) {
3370  AVDictionaryEntry *tcr;
3371  int tmcd_st_id = -1;
3372 
3373  for (j = 0; j < s->nb_streams; j++)
3374  if (s->streams[j]->id == sc->timecode_track)
3375  tmcd_st_id = j;
3376 
3377  if (tmcd_st_id < 0 || tmcd_st_id == i)
3378  continue;
3379  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
3380  if (tcr)
3381  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
3382  }
3383  }
3385 
3386  for (i = 0; i < s->nb_streams; i++) {
3387  AVStream *st = s->streams[i];
3388  MOVStreamContext *sc = st->priv_data;
3389  fix_timescale(mov, sc);
3391  st->skip_samples = sc->start_pad;
3392  }
3393  }
3394 
3395  if (mov->trex_data) {
3396  for (i = 0; i < s->nb_streams; i++) {
3397  AVStream *st = s->streams[i];
3398  MOVStreamContext *sc = st->priv_data;
3399  if (st->duration > 0)
3400  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
3401  }
3402  }
3403 
3404  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
3405  if (mov->bitrates[i]) {
3406  s->streams[i]->codec->bit_rate = mov->bitrates[i];
3407  }
3408  }
3409 
3410  return 0;
3411 }
3412 
3414 {
3415  AVIndexEntry *sample = NULL;
3416  int64_t best_dts = INT64_MAX;
3417  int i;
3418  for (i = 0; i < s->nb_streams; i++) {
3419  AVStream *avst = s->streams[i];
3420  MOVStreamContext *msc = avst->priv_data;
3421  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
3422  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
3423  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
3424  av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
3425  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
3426  (s->pb->seekable &&
3427  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
3428  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
3429  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
3430  sample = current_sample;
3431  best_dts = dts;
3432  *st = avst;
3433  }
3434  }
3435  }
3436  return sample;
3437 }
3438 
3440 {
3441  MOVContext *mov = s->priv_data;
3442  MOVStreamContext *sc;
3444  AVStream *st = NULL;
3445  int ret;
3446  mov->fc = s;
3447  retry:
3448  sample = mov_find_next_sample(s, &st);
3449  if (!sample) {
3450  mov->found_mdat = 0;
3451  if (!mov->next_root_atom)
3452  return AVERROR_EOF;
3453  avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
3454  mov->next_root_atom = 0;
3455  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
3456  url_feof(s->pb))
3457  return AVERROR_EOF;
3458  av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
3459  goto retry;
3460  }
3461  sc = st->priv_data;
3462  /* must be done just before reading, to avoid infinite loop on sample */
3463  sc->current_sample++;
3464 
3465  if (mov->next_root_atom) {
3466  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
3467  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
3468  }
3469 
3470  if (st->discard != AVDISCARD_ALL) {
3471  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3472  av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
3473  sc->ffindex, sample->pos);
3474  return AVERROR_INVALIDDATA;
3475  }
3476  ret = av_get_packet(sc->pb, pkt, sample->size);
3477  if (ret < 0)
3478  return ret;
3479  if (sc->has_palette) {
3480  uint8_t *pal;
3481 
3483  if (!pal) {
3484  av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
3485  } else {
3486  memcpy(pal, sc->palette, AVPALETTE_SIZE);
3487  sc->has_palette = 0;
3488  }
3489  }
3490 #if CONFIG_DV_DEMUXER
3491  if (mov->dv_demux && sc->dv_audio_container) {
3492  avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
3493  av_free(pkt->data);
3494  pkt->size = 0;
3495  ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
3496  if (ret < 0)
3497  return ret;
3498  }
3499 #endif
3500  }
3501 
3502  pkt->stream_index = sc->ffindex;
3503  pkt->dts = sample->timestamp;
3504  if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
3505  pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
3506  /* update ctts context */
3507  sc->ctts_sample++;
3508  if (sc->ctts_index < sc->ctts_count &&
3509  sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
3510  sc->ctts_index++;
3511  sc->ctts_sample = 0;
3512  }
3513  if (sc->wrong_dts)
3514  pkt->dts = AV_NOPTS_VALUE;
3515  } else {
3516  int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
3518  pkt->duration = next_dts - pkt->dts;
3519  pkt->pts = pkt->dts;
3520  }
3521  if (st->discard == AVDISCARD_ALL)
3522  goto retry;
3523  pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
3524  pkt->pos = sample->pos;
3525  av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
3526  pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
3527  return 0;
3528 }
3529 
3530 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
3531 {
3532  MOVStreamContext *sc = st->priv_data;
3533  int sample, time_sample;
3534  int i;
3535 
3536  sample = av_index_search_timestamp(st, timestamp, flags);
3537  av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
3538  if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
3539  sample = 0;
3540  if (sample < 0) /* not sure what to do */
3541  return AVERROR_INVALIDDATA;
3542  sc->current_sample = sample;
3543  av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
3544  /* adjust ctts index */
3545  if (sc->ctts_data) {
3546  time_sample = 0;
3547  for (i = 0; i < sc->ctts_count; i++) {
3548  int next = time_sample + sc->ctts_data[i].count;
3549  if (next > sc->current_sample) {
3550  sc->ctts_index = i;
3551  sc->ctts_sample = sc->current_sample - time_sample;
3552  break;
3553  }
3554  time_sample = next;
3555  }
3556  }
3557  return sample;
3558 }
3559 
3560 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3561 {
3562  AVStream *st;
3563  int64_t seek_timestamp, timestamp;
3564  int sample;
3565  int i;
3566 
3567  if (stream_index >= s->nb_streams)
3568  return AVERROR_INVALIDDATA;
3569 
3570  st = s->streams[stream_index];
3571  sample = mov_seek_stream(s, st, sample_time, flags);
3572  if (sample < 0)
3573  return sample;
3574 
3575  /* adjust seek timestamp to found sample timestamp */
3576  seek_timestamp = st->index_entries[sample].timestamp;
3577 
3578  for (i = 0; i < s->nb_streams; i++) {
3579  MOVStreamContext *sc = s->streams[i]->priv_data;
3580  st = s->streams[i];
3581  st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
3582 
3583  if (stream_index == i)
3584  continue;
3585 
3586  timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
3587  mov_seek_stream(s, st, timestamp, flags);
3588  }
3589  return 0;
3590 }
3591 
3592 static const AVOption options[] = {
3593  {"use_absolute_path",
3594  "allow using absolute path when opening alias, this is a possible security issue",
3595  offsetof(MOVContext, use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
3597  {"ignore_editlist", "", offsetof(MOVContext, ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
3599  {NULL}
3600 };
3601 
3602 static const AVClass mov_class = {
3603  .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
3604  .item_name = av_default_item_name,
3605  .option = options,
3606  .version = LIBAVUTIL_VERSION_INT,
3607 };
3608 
3610  .name = "mov,mp4,m4a,3gp,3g2,mj2",
3611  .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
3612  .priv_data_size = sizeof(MOVContext),
3613  .read_probe = mov_probe,
3618  .priv_class = &mov_class,
3620 };