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mov.c
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1 /*
2  * MOV demuxer
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5  *
6  * first version by Francois Revol <revol@free.fr>
7  * seek function by Gael Chardon <gael.dev@4now.net>
8  *
9  * This file is part of FFmpeg.
10  *
11  * FFmpeg is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * FFmpeg is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with FFmpeg; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
26 #include <inttypes.h>
27 #include <limits.h>
28 #include <stdint.h>
29 
30 #include "libavutil/attributes.h"
32 #include "libavutil/display.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/intfloat.h"
35 #include "libavutil/mathematics.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/timecode.h"
41 #include "libavcodec/ac3tab.h"
42 #include "avformat.h"
43 #include "internal.h"
44 #include "avio_internal.h"
45 #include "riff.h"
46 #include "isom.h"
47 #include "libavcodec/get_bits.h"
48 #include "id3v1.h"
49 #include "mov_chan.h"
50 #include "replaygain.h"
51 
52 #if CONFIG_ZLIB
53 #include <zlib.h>
54 #endif
55 
56 #include "qtpalette.h"
57 
58 
59 #undef NDEBUG
60 #include <assert.h>
61 
62 /* those functions parse an atom */
63 /* links atom IDs to parse functions */
64 typedef struct MOVParseTableEntry {
65  uint32_t type;
66  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
68 
69 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
70 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
71 
73  unsigned len, const char *key)
74 {
75  char buf[16];
76 
77  short current, total = 0;
78  avio_rb16(pb); // unknown
79  current = avio_rb16(pb);
80  if (len >= 6)
81  total = avio_rb16(pb);
82  if (!total)
83  snprintf(buf, sizeof(buf), "%d", current);
84  else
85  snprintf(buf, sizeof(buf), "%d/%d", current, total);
87  av_dict_set(&c->fc->metadata, key, buf, 0);
88 
89  return 0;
90 }
91 
93  unsigned len, const char *key)
94 {
95  /* bypass padding bytes */
96  avio_r8(pb);
97  avio_r8(pb);
98  avio_r8(pb);
99 
101  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
102 
103  return 0;
104 }
105 
107  unsigned len, const char *key)
108 {
110  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
111 
112  return 0;
113 }
114 
116  unsigned len, const char *key)
117 {
118  short genre;
119 
120  avio_r8(pb); // unknown
121 
122  genre = avio_r8(pb);
123  if (genre < 1 || genre > ID3v1_GENRE_MAX)
124  return 0;
126  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
127 
128  return 0;
129 }
130 
131 static const uint32_t mac_to_unicode[128] = {
132  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
133  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
134  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
135  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
136  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
137  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
138  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
139  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
140  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
141  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
142  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
143  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
144  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
145  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
146  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
147  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
148 };
149 
151  char *dst, int dstlen)
152 {
153  char *p = dst;
154  char *end = dst+dstlen-1;
155  int i;
156 
157  for (i = 0; i < len; i++) {
158  uint8_t t, c = avio_r8(pb);
159  if (c < 0x80 && p < end)
160  *p++ = c;
161  else if (p < end)
162  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
163  }
164  *p = 0;
165  return p - dst;
166 }
167 
168 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
169 {
170  AVPacket pkt;
171  AVStream *st;
172  MOVStreamContext *sc;
173  enum AVCodecID id;
174  int ret;
175 
176  switch (type) {
177  case 0xd: id = AV_CODEC_ID_MJPEG; break;
178  case 0xe: id = AV_CODEC_ID_PNG; break;
179  case 0x1b: id = AV_CODEC_ID_BMP; break;
180  default:
181  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
182  avio_skip(pb, len);
183  return 0;
184  }
185 
186  st = avformat_new_stream(c->fc, NULL);
187  if (!st)
188  return AVERROR(ENOMEM);
189  sc = av_mallocz(sizeof(*sc));
190  if (!sc)
191  return AVERROR(ENOMEM);
192  st->priv_data = sc;
193 
194  ret = av_get_packet(pb, &pkt, len);
195  if (ret < 0)
196  return ret;
197 
199 
200  st->attached_pic = pkt;
201  st->attached_pic.stream_index = st->index;
203 
205  st->codec->codec_id = id;
206 
207  return 0;
208 }
209 
211  unsigned len, const char *key)
212 {
213  char *value = av_malloc(len + 1);
214  if (!value)
215  return AVERROR(ENOMEM);
216  avio_read(pb, value, len);
217  value[len] = 0;
218  return av_dict_set(&c->fc->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
219 }
220 
221 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
222 {
223  char language[4] = { 0 };
224  char buf[100];
225  uint16_t langcode = 0;
226  double longitude, latitude;
227  const char *key = "location";
228 
229  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4)
230  return AVERROR_INVALIDDATA;
231 
232  avio_skip(pb, 4); // version+flags
233  langcode = avio_rb16(pb);
234  ff_mov_lang_to_iso639(langcode, language);
235  len -= 6;
236 
237  len -= avio_get_str(pb, len, buf, sizeof(buf)); // place name
238  if (len < 1)
239  return AVERROR_INVALIDDATA;
240  avio_skip(pb, 1); // role
241  len -= 1;
242 
243  if (len < 14)
244  return AVERROR_INVALIDDATA;
245  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
246  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
247 
248  // Try to output in the same format as the ?xyz field
249  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f/", latitude, longitude);
250  if (*language && strcmp(language, "und")) {
251  char key2[16];
252  snprintf(key2, sizeof(key2), "%s-%s", key, language);
253  av_dict_set(&c->fc->metadata, key2, buf, 0);
254  }
256  return av_dict_set(&c->fc->metadata, key, buf, 0);
257 }
258 
260 {
261  char tmp_key[5];
262  char key2[32], language[4] = {0};
263  char *str = NULL;
264  const char *key = NULL;
265  uint16_t langcode = 0;
266  uint32_t data_type = 0, str_size, str_size_alloc;
267  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
268 
269  switch (atom.type) {
270  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
271  case MKTAG(0xa9,'a','u','t'):
272  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
273  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
274  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
275  case MKTAG( 'c','p','i','l'): key = "compilation";
277  case MKTAG( 'c','p','r','t'):
278  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
279  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
280  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
281  case MKTAG(0xa9,'c','m','t'):
282  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
283  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
284  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
285  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
286  case MKTAG( 'g','n','r','e'): key = "genre";
287  parse = mov_metadata_gnre; break;
288  case MKTAG(0xa9,'t','o','o'):
289  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
290  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
291  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
292  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
293  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
294  case MKTAG( 'd','e','s','c'): key = "description";break;
295  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
296  case MKTAG( 't','v','s','h'): key = "show"; break;
297  case MKTAG( 't','v','e','n'): key = "episode_id";break;
298  case MKTAG( 't','v','n','n'): key = "network"; break;
299  case MKTAG( 't','r','k','n'): key = "track";
301  case MKTAG( 'd','i','s','k'): key = "disc";
303  case MKTAG( 't','v','e','s'): key = "episode_sort";
305  case MKTAG( 't','v','s','n'): key = "season_number";
307  case MKTAG( 's','t','i','k'): key = "media_type";
309  case MKTAG( 'h','d','v','d'): key = "hd_video";
311  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
313  case MKTAG( '@','P','R','M'):
314  return mov_metadata_raw(c, pb, atom.size, "premiere_version");
315  case MKTAG( '@','P','R','Q'):
316  return mov_metadata_raw(c, pb, atom.size, "quicktime_version");
317  case MKTAG( 'l','o','c','i'):
318  return mov_metadata_loci(c, pb, atom.size);
319  case MKTAG( 'X','M','P','_'):
320  return mov_metadata_raw(c, pb, atom.size, "xmp");
321  }
322 
323  if (c->itunes_metadata && atom.size > 8) {
324  int data_size = avio_rb32(pb);
325  int tag = avio_rl32(pb);
326  if (tag == MKTAG('d','a','t','a')) {
327  data_type = avio_rb32(pb); // type
328  avio_rb32(pb); // unknown
329  str_size = data_size - 16;
330  atom.size -= 16;
331 
332  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
333  int ret = mov_read_covr(c, pb, data_type, str_size);
334  if (ret < 0) {
335  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
336  }
337  return ret;
338  }
339  } else return 0;
340  } else if (atom.size > 4 && key && !c->itunes_metadata) {
341  str_size = avio_rb16(pb); // string length
342  langcode = avio_rb16(pb);
343  ff_mov_lang_to_iso639(langcode, language);
344  atom.size -= 4;
345  } else
346  str_size = atom.size;
347 
348  if (c->export_all && !key) {
349  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
350  key = tmp_key;
351  }
352 
353  if (!key)
354  return 0;
355  if (atom.size < 0)
356  return AVERROR_INVALIDDATA;
357 
358  str_size_alloc = str_size << 1; // worst-case requirement for output string in case of utf8 coded input
359  str = av_malloc(str_size_alloc);
360  if (!str)
361  return AVERROR(ENOMEM);
362 
363  if (parse)
364  parse(c, pb, str_size, key);
365  else {
366  if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
367  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
368  } else {
369  int ret = avio_read(pb, str, str_size);
370  if (ret != str_size) {
371  av_freep(&str);
372  return ret < 0 ? ret : AVERROR_INVALIDDATA;
373  }
374  str[str_size] = 0;
375  }
377  av_dict_set(&c->fc->metadata, key, str, 0);
378  if (*language && strcmp(language, "und")) {
379  snprintf(key2, sizeof(key2), "%s-%s", key, language);
380  av_dict_set(&c->fc->metadata, key2, str, 0);
381  }
382  }
383  av_dlog(c->fc, "lang \"%3s\" ", language);
384  av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
385  key, str, (char*)&atom.type, str_size_alloc, atom.size);
386 
387  av_freep(&str);
388  return 0;
389 }
390 
392 {
393  int64_t start;
394  int i, nb_chapters, str_len, version;
395  char str[256+1];
396 
397  if ((atom.size -= 5) < 0)
398  return 0;
399 
400  version = avio_r8(pb);
401  avio_rb24(pb);
402  if (version)
403  avio_rb32(pb); // ???
404  nb_chapters = avio_r8(pb);
405 
406  for (i = 0; i < nb_chapters; i++) {
407  if (atom.size < 9)
408  return 0;
409 
410  start = avio_rb64(pb);
411  str_len = avio_r8(pb);
412 
413  if ((atom.size -= 9+str_len) < 0)
414  return 0;
415 
416  avio_read(pb, str, str_len);
417  str[str_len] = 0;
418  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
419  }
420  return 0;
421 }
422 
423 #define MIN_DATA_ENTRY_BOX_SIZE 12
425 {
426  AVStream *st;
427  MOVStreamContext *sc;
428  int entries, i, j;
429 
430  if (c->fc->nb_streams < 1)
431  return 0;
432  st = c->fc->streams[c->fc->nb_streams-1];
433  sc = st->priv_data;
434 
435  avio_rb32(pb); // version + flags
436  entries = avio_rb32(pb);
437  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
438  entries >= UINT_MAX / sizeof(*sc->drefs))
439  return AVERROR_INVALIDDATA;
440  av_free(sc->drefs);
441  sc->drefs_count = 0;
442  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
443  if (!sc->drefs)
444  return AVERROR(ENOMEM);
445  sc->drefs_count = entries;
446 
447  for (i = 0; i < sc->drefs_count; i++) {
448  MOVDref *dref = &sc->drefs[i];
449  uint32_t size = avio_rb32(pb);
450  int64_t next = avio_tell(pb) + size - 4;
451 
452  if (size < 12)
453  return AVERROR_INVALIDDATA;
454 
455  dref->type = avio_rl32(pb);
456  avio_rb32(pb); // version + flags
457  av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
458 
459  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
460  /* macintosh alias record */
461  uint16_t volume_len, len;
462  int16_t type;
463 
464  avio_skip(pb, 10);
465 
466  volume_len = avio_r8(pb);
467  volume_len = FFMIN(volume_len, 27);
468  avio_read(pb, dref->volume, 27);
469  dref->volume[volume_len] = 0;
470  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
471 
472  avio_skip(pb, 12);
473 
474  len = avio_r8(pb);
475  len = FFMIN(len, 63);
476  avio_read(pb, dref->filename, 63);
477  dref->filename[len] = 0;
478  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
479 
480  avio_skip(pb, 16);
481 
482  /* read next level up_from_alias/down_to_target */
483  dref->nlvl_from = avio_rb16(pb);
484  dref->nlvl_to = avio_rb16(pb);
485  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
486  dref->nlvl_from, dref->nlvl_to);
487 
488  avio_skip(pb, 16);
489 
490  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
491  if(avio_feof(pb))
492  return AVERROR_EOF;
493  type = avio_rb16(pb);
494  len = avio_rb16(pb);
495  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
496  if (len&1)
497  len += 1;
498  if (type == 2) { // absolute path
499  av_free(dref->path);
500  dref->path = av_mallocz(len+1);
501  if (!dref->path)
502  return AVERROR(ENOMEM);
503  avio_read(pb, dref->path, len);
504  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
505  len -= volume_len;
506  memmove(dref->path, dref->path+volume_len, len);
507  dref->path[len] = 0;
508  }
509  for (j = 0; j < len; j++)
510  if (dref->path[j] == ':')
511  dref->path[j] = '/';
512  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
513  } else if (type == 0) { // directory name
514  av_free(dref->dir);
515  dref->dir = av_malloc(len+1);
516  if (!dref->dir)
517  return AVERROR(ENOMEM);
518  if (avio_read(pb, dref->dir, len) != len)
519  return AVERROR_INVALIDDATA;
520  dref->dir[len] = 0;
521  for (j = 0; j < len; j++)
522  if (dref->dir[j] == ':')
523  dref->dir[j] = '/';
524  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
525  } else
526  avio_skip(pb, len);
527  }
528  }
529  avio_seek(pb, next, SEEK_SET);
530  }
531  return 0;
532 }
533 
535 {
536  AVStream *st;
537  uint32_t type;
538  uint32_t av_unused ctype;
539  int title_size;
540  char *title_str;
541 
542  if (c->fc->nb_streams < 1) // meta before first trak
543  return 0;
544 
545  st = c->fc->streams[c->fc->nb_streams-1];
546 
547  avio_r8(pb); /* version */
548  avio_rb24(pb); /* flags */
549 
550  /* component type */
551  ctype = avio_rl32(pb);
552  type = avio_rl32(pb); /* component subtype */
553 
554  av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
555  av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
556 
557  if (type == MKTAG('v','i','d','e'))
559  else if (type == MKTAG('s','o','u','n'))
561  else if (type == MKTAG('m','1','a',' '))
563  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
565 
566  avio_rb32(pb); /* component manufacture */
567  avio_rb32(pb); /* component flags */
568  avio_rb32(pb); /* component flags mask */
569 
570  title_size = atom.size - 24;
571  if (title_size > 0) {
572  title_str = av_malloc(title_size + 1); /* Add null terminator */
573  if (!title_str)
574  return AVERROR(ENOMEM);
575  avio_read(pb, title_str, title_size);
576  title_str[title_size] = 0;
577  if (title_str[0])
578  av_dict_set(&st->metadata, "handler_name", title_str +
579  (!c->isom && title_str[0] == title_size - 1), 0);
580  av_freep(&title_str);
581  }
582 
583  return 0;
584 }
585 
587 {
588  AVStream *st;
589  int tag;
590 
591  if (fc->nb_streams < 1)
592  return 0;
593  st = fc->streams[fc->nb_streams-1];
594 
595  avio_rb32(pb); /* version + flags */
596  ff_mp4_read_descr(fc, pb, &tag);
597  if (tag == MP4ESDescrTag) {
598  ff_mp4_parse_es_descr(pb, NULL);
599  } else
600  avio_rb16(pb); /* ID */
601 
602  ff_mp4_read_descr(fc, pb, &tag);
603  if (tag == MP4DecConfigDescrTag)
604  ff_mp4_read_dec_config_descr(fc, st, pb);
605  return 0;
606 }
607 
609 {
610  return ff_mov_read_esds(c->fc, pb);
611 }
612 
614 {
615  AVStream *st;
616  int ac3info, acmod, lfeon, bsmod;
617 
618  if (c->fc->nb_streams < 1)
619  return 0;
620  st = c->fc->streams[c->fc->nb_streams-1];
621 
622  ac3info = avio_rb24(pb);
623  bsmod = (ac3info >> 14) & 0x7;
624  acmod = (ac3info >> 11) & 0x7;
625  lfeon = (ac3info >> 10) & 0x1;
626  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
628  if (lfeon)
630  st->codec->audio_service_type = bsmod;
631  if (st->codec->channels > 1 && bsmod == 0x7)
633 
634  return 0;
635 }
636 
638 {
639  AVStream *st;
640  int eac3info, acmod, lfeon, bsmod;
641 
642  if (c->fc->nb_streams < 1)
643  return 0;
644  st = c->fc->streams[c->fc->nb_streams-1];
645 
646  /* No need to parse fields for additional independent substreams and its
647  * associated dependent substreams since libavcodec's E-AC-3 decoder
648  * does not support them yet. */
649  avio_rb16(pb); /* data_rate and num_ind_sub */
650  eac3info = avio_rb24(pb);
651  bsmod = (eac3info >> 12) & 0x1f;
652  acmod = (eac3info >> 9) & 0x7;
653  lfeon = (eac3info >> 8) & 0x1;
655  if (lfeon)
658  st->codec->audio_service_type = bsmod;
659  if (st->codec->channels > 1 && bsmod == 0x7)
661 
662  return 0;
663 }
664 
666 {
667  AVStream *st;
668 
669  if (c->fc->nb_streams < 1)
670  return 0;
671  st = c->fc->streams[c->fc->nb_streams-1];
672 
673  if (atom.size < 16)
674  return 0;
675 
676  /* skip version and flags */
677  avio_skip(pb, 4);
678 
679  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
680 
681  return 0;
682 }
683 
685 {
686  AVStream *st;
687  int ret;
688 
689  if (c->fc->nb_streams < 1)
690  return 0;
691  st = c->fc->streams[c->fc->nb_streams-1];
692 
693  if ((ret = ff_get_wav_header(pb, st->codec, atom.size)) < 0)
694  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
695 
696  return ret;
697 }
698 
700 {
701  const int num = avio_rb32(pb);
702  const int den = avio_rb32(pb);
703  AVStream *st;
704 
705  if (c->fc->nb_streams < 1)
706  return 0;
707  st = c->fc->streams[c->fc->nb_streams-1];
708 
709  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
710  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
712  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
714  num, den);
715  } else if (den != 0) {
716  st->sample_aspect_ratio.num = num;
717  st->sample_aspect_ratio.den = den;
718  }
719  return 0;
720 }
721 
722 /* this atom contains actual media data */
724 {
725  if (atom.size == 0) /* wrong one (MP4) */
726  return 0;
727  c->found_mdat=1;
728  return 0; /* now go for moov */
729 }
730 
731 /* read major brand, minor version and compatible brands and store them as metadata */
733 {
734  uint32_t minor_ver;
735  int comp_brand_size;
736  char* comp_brands_str;
737  uint8_t type[5] = {0};
738 
739  avio_read(pb, type, 4);
740  if (strcmp(type, "qt "))
741  c->isom = 1;
742  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
743  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
744  minor_ver = avio_rb32(pb); /* minor version */
745  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
746 
747  comp_brand_size = atom.size - 8;
748  if (comp_brand_size < 0)
749  return AVERROR_INVALIDDATA;
750  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
751  if (!comp_brands_str)
752  return AVERROR(ENOMEM);
753  avio_read(pb, comp_brands_str, comp_brand_size);
754  comp_brands_str[comp_brand_size] = 0;
755  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
756  av_freep(&comp_brands_str);
757 
758  return 0;
759 }
760 
761 /* this atom should contain all header atoms */
763 {
764  int ret;
765 
766  if (c->found_moov) {
767  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
768  avio_skip(pb, atom.size);
769  return 0;
770  }
771 
772  if ((ret = mov_read_default(c, pb, atom)) < 0)
773  return ret;
774  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
775  /* so we don't parse the whole file if over a network */
776  c->found_moov=1;
777  return 0; /* now go for mdat */
778 }
779 
781 {
782  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
783  c->has_looked_for_mfra = 1;
784  if (pb->seekable) {
785  int ret;
786  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
787  "for a mfra\n");
788  if ((ret = mov_read_mfra(c, pb)) < 0) {
789  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
790  "read the mfra (may be a live ismv)\n");
791  }
792  } else {
793  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
794  "seekable, can not look for mfra\n");
795  }
796  }
798  av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
799  return mov_read_default(c, pb, atom);
800 }
801 
802 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
803 {
804  char buffer[32];
805  if (time) {
806  struct tm *ptm, tmbuf;
807  time_t timet;
808  if(time >= 2082844800)
809  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
810  timet = time;
811  ptm = gmtime_r(&timet, &tmbuf);
812  if (!ptm) return;
813  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
814  av_dict_set(metadata, "creation_time", buffer, 0);
815  }
816 }
817 
819 {
820  AVStream *st;
821  MOVStreamContext *sc;
822  int version;
823  char language[4] = {0};
824  unsigned lang;
825  int64_t creation_time;
826 
827  if (c->fc->nb_streams < 1)
828  return 0;
829  st = c->fc->streams[c->fc->nb_streams-1];
830  sc = st->priv_data;
831 
832  if (sc->time_scale) {
833  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
834  return AVERROR_INVALIDDATA;
835  }
836 
837  version = avio_r8(pb);
838  if (version > 1) {
839  avpriv_request_sample(c->fc, "Version %d", version);
840  return AVERROR_PATCHWELCOME;
841  }
842  avio_rb24(pb); /* flags */
843  if (version == 1) {
844  creation_time = avio_rb64(pb);
845  avio_rb64(pb);
846  } else {
847  creation_time = avio_rb32(pb);
848  avio_rb32(pb); /* modification time */
849  }
850  mov_metadata_creation_time(&st->metadata, creation_time);
851 
852  sc->time_scale = avio_rb32(pb);
853  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
854 
855  lang = avio_rb16(pb); /* language */
856  if (ff_mov_lang_to_iso639(lang, language))
857  av_dict_set(&st->metadata, "language", language, 0);
858  avio_rb16(pb); /* quality */
859 
860  return 0;
861 }
862 
864 {
865  int64_t creation_time;
866  int version = avio_r8(pb); /* version */
867  avio_rb24(pb); /* flags */
868 
869  if (version == 1) {
870  creation_time = avio_rb64(pb);
871  avio_rb64(pb);
872  } else {
873  creation_time = avio_rb32(pb);
874  avio_rb32(pb); /* modification time */
875  }
876  mov_metadata_creation_time(&c->fc->metadata, creation_time);
877  c->time_scale = avio_rb32(pb); /* time scale */
878 
879  av_dlog(c->fc, "time scale = %i\n", c->time_scale);
880 
881  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
882  // set the AVCodecContext duration because the duration of individual tracks
883  // may be inaccurate
884  if (c->time_scale > 0 && !c->trex_data)
886  avio_rb32(pb); /* preferred scale */
887 
888  avio_rb16(pb); /* preferred volume */
889 
890  avio_skip(pb, 10); /* reserved */
891 
892  avio_skip(pb, 36); /* display matrix */
893 
894  avio_rb32(pb); /* preview time */
895  avio_rb32(pb); /* preview duration */
896  avio_rb32(pb); /* poster time */
897  avio_rb32(pb); /* selection time */
898  avio_rb32(pb); /* selection duration */
899  avio_rb32(pb); /* current time */
900  avio_rb32(pb); /* next track ID */
901  return 0;
902 }
903 
905 {
906  AVStream *st;
907  int little_endian;
908 
909  if (c->fc->nb_streams < 1)
910  return 0;
911  st = c->fc->streams[c->fc->nb_streams-1];
912 
913  little_endian = avio_rb16(pb) & 0xFF;
914  av_dlog(c->fc, "enda %d\n", little_endian);
915  if (little_endian == 1) {
916  switch (st->codec->codec_id) {
919  break;
922  break;
925  break;
928  break;
929  default:
930  break;
931  }
932  }
933  return 0;
934 }
935 
937 {
938  AVStream *st;
939  char color_parameter_type[5] = { 0 };
940  int color_primaries, color_trc, color_matrix;
941 
942  if (c->fc->nb_streams < 1)
943  return 0;
944  st = c->fc->streams[c->fc->nb_streams - 1];
945 
946  avio_read(pb, color_parameter_type, 4);
947  if (strncmp(color_parameter_type, "nclx", 4) &&
948  strncmp(color_parameter_type, "nclc", 4)) {
949  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
950  color_parameter_type);
951  return 0;
952  }
953 
954  color_primaries = avio_rb16(pb);
955  color_trc = avio_rb16(pb);
956  color_matrix = avio_rb16(pb);
957 
958  av_dlog(c->fc, "%s: pri %d trc %d matrix %d",
959  color_parameter_type, color_primaries, color_trc, color_matrix);
960 
961  if (c->isom) {
962  uint8_t color_range = avio_r8(pb) >> 7;
963  av_dlog(c->fc, " full %"PRIu8"", color_range);
964  if (color_range)
966  else
968  /* 14496-12 references JPEG XR specs (rather than the more complete
969  * 23001-8) so some adjusting is required */
970  if (color_primaries >= AVCOL_PRI_FILM)
971  color_primaries = AVCOL_PRI_UNSPECIFIED;
972  if ((color_trc >= AVCOL_TRC_LINEAR &&
973  color_trc <= AVCOL_TRC_LOG_SQRT) ||
974  color_trc >= AVCOL_TRC_BT2020_10)
975  color_trc = AVCOL_TRC_UNSPECIFIED;
976  if (color_matrix >= AVCOL_SPC_BT2020_NCL)
977  color_matrix = AVCOL_SPC_UNSPECIFIED;
979  st->codec->color_trc = color_trc;
980  st->codec->colorspace = color_matrix;
981  } else {
982  /* color primaries, Table 4-4 */
983  switch (color_primaries) {
984  case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
985  case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
986  case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
987  }
988  /* color transfer, Table 4-5 */
989  switch (color_trc) {
990  case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
991  case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
992  }
993  /* color matrix, Table 4-6 */
994  switch (color_matrix) {
995  case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
996  case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
997  case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
998  }
999  }
1000  av_dlog(c->fc, "\n");
1001 
1002  return 0;
1003 }
1004 
1006 {
1007  AVStream *st;
1008  unsigned mov_field_order;
1009  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1010 
1011  if (c->fc->nb_streams < 1) // will happen with jp2 files
1012  return 0;
1013  st = c->fc->streams[c->fc->nb_streams-1];
1014  if (atom.size < 2)
1015  return AVERROR_INVALIDDATA;
1016  mov_field_order = avio_rb16(pb);
1017  if ((mov_field_order & 0xFF00) == 0x0100)
1018  decoded_field_order = AV_FIELD_PROGRESSIVE;
1019  else if ((mov_field_order & 0xFF00) == 0x0200) {
1020  switch (mov_field_order & 0xFF) {
1021  case 0x01: decoded_field_order = AV_FIELD_TT;
1022  break;
1023  case 0x06: decoded_field_order = AV_FIELD_BB;
1024  break;
1025  case 0x09: decoded_field_order = AV_FIELD_TB;
1026  break;
1027  case 0x0E: decoded_field_order = AV_FIELD_BT;
1028  break;
1029  }
1030  }
1031  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1032  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1033  }
1034  st->codec->field_order = decoded_field_order;
1035 
1036  return 0;
1037 }
1038 
1039 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1041  enum AVCodecID codec_id)
1042 {
1043  AVStream *st;
1044  uint64_t size;
1045  uint8_t *buf;
1046  int err;
1047 
1048  if (c->fc->nb_streams < 1) // will happen with jp2 files
1049  return 0;
1050  st= c->fc->streams[c->fc->nb_streams-1];
1051 
1052  if (st->codec->codec_id != codec_id)
1053  return 0; /* unexpected codec_id - don't mess with extradata */
1054 
1055  size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
1056  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1057  return AVERROR_INVALIDDATA;
1058  if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
1059  st->codec->extradata_size = 0;
1060  return err;
1061  }
1062  buf = st->codec->extradata + st->codec->extradata_size;
1064  AV_WB32( buf , atom.size + 8);
1065  AV_WL32( buf + 4, atom.type);
1066  err = avio_read(pb, buf + 8, atom.size);
1067  if (err < 0) {
1068  return err;
1069  } else if (err < atom.size) {
1070  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1071  st->codec->extradata_size -= atom.size - err;
1072  }
1073  memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1074  return 0;
1075 }
1076 
1077 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1079 {
1080  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1081 }
1082 
1084 {
1085  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1086 }
1087 
1089 {
1090  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1091 }
1092 
1094 {
1095  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1096  if(ret == 0)
1097  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1098  return ret;
1099 }
1100 
1102 {
1103  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1104 
1105  if (!ret && c->fc->nb_streams >= 1) {
1106  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1107  if (avctx->extradata_size >= 40) {
1108  avctx->height = AV_RB16(&avctx->extradata[36]);
1109  avctx->width = AV_RB16(&avctx->extradata[38]);
1110  }
1111  }
1112  return ret;
1113 }
1114 
1116 {
1117  if (c->fc->nb_streams >= 1) {
1118  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1119  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1120  codec->codec_id == AV_CODEC_ID_H264 &&
1121  atom.size > 11) {
1122  avio_skip(pb, 10);
1123  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1124  if (avio_rb16(pb) == 0xd4d)
1125  codec->width = 1440;
1126  return 0;
1127  }
1128  }
1129 
1130  return mov_read_avid(c, pb, atom);
1131 }
1132 
1134 {
1135  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1136 }
1137 
1139 {
1140  AVStream *st;
1141 
1142  if (c->fc->nb_streams < 1)
1143  return 0;
1144  st = c->fc->streams[c->fc->nb_streams-1];
1145 
1146  if ((uint64_t)atom.size > (1<<30))
1147  return AVERROR_INVALIDDATA;
1148 
1149  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1150  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1151  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1152  // pass all frma atom to codec, needed at least for QDMC and QDM2
1153  av_free(st->codec->extradata);
1154  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1155  return AVERROR(ENOMEM);
1156  } else if (atom.size > 8) { /* to read frma, esds atoms */
1157  int ret;
1158  if ((ret = mov_read_default(c, pb, atom)) < 0)
1159  return ret;
1160  } else
1161  avio_skip(pb, atom.size);
1162  return 0;
1163 }
1164 
1165 /**
1166  * This function reads atom content and puts data in extradata without tag
1167  * nor size unlike mov_read_extradata.
1168  */
1170 {
1171  AVStream *st;
1172 
1173  if (c->fc->nb_streams < 1)
1174  return 0;
1175  st = c->fc->streams[c->fc->nb_streams-1];
1176 
1177  if ((uint64_t)atom.size > (1<<30))
1178  return AVERROR_INVALIDDATA;
1179 
1180  if (atom.size >= 10) {
1181  // Broken files created by legacy versions of libavformat will
1182  // wrap a whole fiel atom inside of a glbl atom.
1183  unsigned size = avio_rb32(pb);
1184  unsigned type = avio_rl32(pb);
1185  avio_seek(pb, -8, SEEK_CUR);
1186  if (type == MKTAG('f','i','e','l') && size == atom.size)
1187  return mov_read_default(c, pb, atom);
1188  }
1189  if (st->codec->extradata_size > 1 && st->codec->extradata) {
1190  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1191  return 0;
1192  }
1193  av_free(st->codec->extradata);
1194  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1195  return AVERROR(ENOMEM);
1196 
1197  return 0;
1198 }
1199 
1201 {
1202  AVStream *st;
1203  uint8_t profile_level;
1204  int ret;
1205 
1206  if (c->fc->nb_streams < 1)
1207  return 0;
1208  st = c->fc->streams[c->fc->nb_streams-1];
1209 
1210  if (atom.size >= (1<<28) || atom.size < 7)
1211  return AVERROR_INVALIDDATA;
1212 
1213  profile_level = avio_r8(pb);
1214  if ((profile_level & 0xf0) != 0xc0)
1215  return 0;
1216 
1217  avio_seek(pb, 6, SEEK_CUR);
1218  av_free(st->codec->extradata);
1219  if ((ret = ff_get_extradata(st->codec, pb, atom.size - 7)) < 0)
1220  return ret;
1221 
1222  return 0;
1223 }
1224 
1225 /**
1226  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1227  * but can have extradata appended at the end after the 40 bytes belonging
1228  * to the struct.
1229  */
1231 {
1232  AVStream *st;
1233 
1234  if (c->fc->nb_streams < 1)
1235  return 0;
1236  if (atom.size <= 40)
1237  return 0;
1238  st = c->fc->streams[c->fc->nb_streams-1];
1239 
1240  if ((uint64_t)atom.size > (1<<30))
1241  return AVERROR_INVALIDDATA;
1242 
1243  avio_skip(pb, 40);
1244  av_free(st->codec->extradata);
1245  if (ff_get_extradata(st->codec, pb, atom.size - 40) < 0)
1246  return AVERROR(ENOMEM);
1247  return 0;
1248 }
1249 
1251 {
1252  AVStream *st;
1253  MOVStreamContext *sc;
1254  unsigned int i, entries;
1255 
1256  if (c->fc->nb_streams < 1)
1257  return 0;
1258  st = c->fc->streams[c->fc->nb_streams-1];
1259  sc = st->priv_data;
1260 
1261  avio_r8(pb); /* version */
1262  avio_rb24(pb); /* flags */
1263 
1264  entries = avio_rb32(pb);
1265 
1266  if (!entries)
1267  return 0;
1268 
1269  if (sc->chunk_offsets)
1270  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1271  av_free(sc->chunk_offsets);
1272  sc->chunk_count = 0;
1273  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1274  if (!sc->chunk_offsets)
1275  return AVERROR(ENOMEM);
1276  sc->chunk_count = entries;
1277 
1278  if (atom.type == MKTAG('s','t','c','o'))
1279  for (i = 0; i < entries && !pb->eof_reached; i++)
1280  sc->chunk_offsets[i] = avio_rb32(pb);
1281  else if (atom.type == MKTAG('c','o','6','4'))
1282  for (i = 0; i < entries && !pb->eof_reached; i++)
1283  sc->chunk_offsets[i] = avio_rb64(pb);
1284  else
1285  return AVERROR_INVALIDDATA;
1286 
1287  sc->chunk_count = i;
1288 
1289  if (pb->eof_reached)
1290  return AVERROR_EOF;
1291 
1292  return 0;
1293 }
1294 
1295 /**
1296  * Compute codec id for 'lpcm' tag.
1297  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1298  */
1300 {
1301  /* lpcm flags:
1302  * 0x1 = float
1303  * 0x2 = big-endian
1304  * 0x4 = signed
1305  */
1306  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1307 }
1308 
1309 static int mov_codec_id(AVStream *st, uint32_t format)
1310 {
1311  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1312 
1313  if (id <= 0 &&
1314  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1315  (format & 0xFFFF) == 'T' + ('S' << 8)))
1316  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1317 
1318  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1320  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1321  /* skip old asf mpeg4 tag */
1322  format && format != MKTAG('m','p','4','s')) {
1324  if (id <= 0)
1325  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1326  if (id > 0)
1328  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1330  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1332  if (id > 0)
1334  }
1335  }
1336 
1337  st->codec->codec_tag = format;
1338 
1339  return id;
1340 }
1341 
1343  AVStream *st, MOVStreamContext *sc)
1344 {
1345  uint8_t codec_name[32];
1346  unsigned int color_depth, len, j;
1347  int color_greyscale;
1348  int color_table_id;
1349 
1350  avio_rb16(pb); /* version */
1351  avio_rb16(pb); /* revision level */
1352  avio_rb32(pb); /* vendor */
1353  avio_rb32(pb); /* temporal quality */
1354  avio_rb32(pb); /* spatial quality */
1355 
1356  st->codec->width = avio_rb16(pb); /* width */
1357  st->codec->height = avio_rb16(pb); /* height */
1358 
1359  avio_rb32(pb); /* horiz resolution */
1360  avio_rb32(pb); /* vert resolution */
1361  avio_rb32(pb); /* data size, always 0 */
1362  avio_rb16(pb); /* frames per samples */
1363 
1364  len = avio_r8(pb); /* codec name, pascal string */
1365  if (len > 31)
1366  len = 31;
1367  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1368  if (len < 31)
1369  avio_skip(pb, 31 - len);
1370 
1371  if (codec_name[0])
1372  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1373 
1374  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1375  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1376  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1377  st->codec->width &= ~1;
1378  st->codec->height &= ~1;
1379  }
1380  /* Flash Media Server uses tag H263 with Sorenson Spark */
1381  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1382  !memcmp(codec_name, "Sorenson H263", 13))
1384 
1385  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1386  color_table_id = avio_rb16(pb); /* colortable id */
1387  av_dlog(c->fc, "depth %d, ctab id %d\n",
1388  st->codec->bits_per_coded_sample, color_table_id);
1389  /* figure out the palette situation */
1390  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1391  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1392  /* Do not create a greyscale palette for cinepak */
1393  if (color_greyscale && st->codec->codec_id == AV_CODEC_ID_CINEPAK)
1394  return;
1395 
1396  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1397  if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1398  /* for palette traversal */
1399  unsigned int color_start, color_count, color_end;
1400  unsigned char a, r, g, b;
1401 
1402  if (color_greyscale) {
1403  int color_index, color_dec;
1404  /* compute the greyscale palette */
1405  st->codec->bits_per_coded_sample = color_depth;
1406  color_count = 1 << color_depth;
1407  color_index = 255;
1408  color_dec = 256 / (color_count - 1);
1409  for (j = 0; j < color_count; j++) {
1410  r = g = b = color_index;
1411  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1412  color_index -= color_dec;
1413  if (color_index < 0)
1414  color_index = 0;
1415  }
1416  } else if (color_table_id) {
1417  const uint8_t *color_table;
1418  /* if flag bit 3 is set, use the default palette */
1419  color_count = 1 << color_depth;
1420  if (color_depth == 2)
1421  color_table = ff_qt_default_palette_4;
1422  else if (color_depth == 4)
1423  color_table = ff_qt_default_palette_16;
1424  else
1425  color_table = ff_qt_default_palette_256;
1426 
1427  for (j = 0; j < color_count; j++) {
1428  r = color_table[j * 3 + 0];
1429  g = color_table[j * 3 + 1];
1430  b = color_table[j * 3 + 2];
1431  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1432  }
1433  } else {
1434  /* load the palette from the file */
1435  color_start = avio_rb32(pb);
1436  color_count = avio_rb16(pb);
1437  color_end = avio_rb16(pb);
1438  if ((color_start <= 255) && (color_end <= 255)) {
1439  for (j = color_start; j <= color_end; j++) {
1440  /* each A, R, G, or B component is 16 bits;
1441  * only use the top 8 bits */
1442  a = avio_r8(pb);
1443  avio_r8(pb);
1444  r = avio_r8(pb);
1445  avio_r8(pb);
1446  g = avio_r8(pb);
1447  avio_r8(pb);
1448  b = avio_r8(pb);
1449  avio_r8(pb);
1450  sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1451  }
1452  }
1453  }
1454  sc->has_palette = 1;
1455  }
1456 }
1457 
1459  AVStream *st, MOVStreamContext *sc)
1460 {
1461  int bits_per_sample, flags;
1462  uint16_t version = avio_rb16(pb);
1463  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1464 
1465  avio_rb16(pb); /* revision level */
1466  avio_rb32(pb); /* vendor */
1467 
1468  st->codec->channels = avio_rb16(pb); /* channel count */
1469  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1470  av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1471 
1472  sc->audio_cid = avio_rb16(pb);
1473  avio_rb16(pb); /* packet size = 0 */
1474 
1475  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1476 
1477  // Read QT version 1 fields. In version 0 these do not exist.
1478  av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
1479  if (!c->isom ||
1480  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1481 
1482  if (version == 1) {
1483  sc->samples_per_frame = avio_rb32(pb);
1484  avio_rb32(pb); /* bytes per packet */
1485  sc->bytes_per_frame = avio_rb32(pb);
1486  avio_rb32(pb); /* bytes per sample */
1487  } else if (version == 2) {
1488  avio_rb32(pb); /* sizeof struct only */
1490  st->codec->channels = avio_rb32(pb);
1491  avio_rb32(pb); /* always 0x7F000000 */
1493 
1494  flags = avio_rb32(pb); /* lpcm format specific flag */
1495  sc->bytes_per_frame = avio_rb32(pb);
1496  sc->samples_per_frame = avio_rb32(pb);
1497  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1498  st->codec->codec_id =
1500  flags);
1501  }
1502  }
1503 
1504  switch (st->codec->codec_id) {
1505  case AV_CODEC_ID_PCM_S8:
1506  case AV_CODEC_ID_PCM_U8:
1507  if (st->codec->bits_per_coded_sample == 16)
1509  break;
1510  case AV_CODEC_ID_PCM_S16LE:
1511  case AV_CODEC_ID_PCM_S16BE:
1512  if (st->codec->bits_per_coded_sample == 8)
1514  else if (st->codec->bits_per_coded_sample == 24)
1515  st->codec->codec_id =
1518  else if (st->codec->bits_per_coded_sample == 32)
1519  st->codec->codec_id =
1522  break;
1523  /* set values for old format before stsd version 1 appeared */
1524  case AV_CODEC_ID_MACE3:
1525  sc->samples_per_frame = 6;
1526  sc->bytes_per_frame = 2 * st->codec->channels;
1527  break;
1528  case AV_CODEC_ID_MACE6:
1529  sc->samples_per_frame = 6;
1530  sc->bytes_per_frame = 1 * st->codec->channels;
1531  break;
1533  sc->samples_per_frame = 64;
1534  sc->bytes_per_frame = 34 * st->codec->channels;
1535  break;
1536  case AV_CODEC_ID_GSM:
1537  sc->samples_per_frame = 160;
1538  sc->bytes_per_frame = 33;
1539  break;
1540  default:
1541  break;
1542  }
1543 
1544  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1545  if (bits_per_sample) {
1546  st->codec->bits_per_coded_sample = bits_per_sample;
1547  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1548  }
1549 }
1550 
1552  AVStream *st, MOVStreamContext *sc,
1553  int size)
1554 {
1555  // ttxt stsd contains display flags, justification, background
1556  // color, fonts, and default styles, so fake an atom to read it
1557  MOVAtom fake_atom = { .size = size };
1558  // mp4s contains a regular esds atom
1559  if (st->codec->codec_tag != AV_RL32("mp4s"))
1560  mov_read_glbl(c, pb, fake_atom);
1561  st->codec->width = sc->width;
1562  st->codec->height = sc->height;
1563 }
1564 
1565 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1566 {
1567  uint8_t r, g, b;
1568  int y, cb, cr;
1569 
1570  y = (ycbcr >> 16) & 0xFF;
1571  cr = (ycbcr >> 8) & 0xFF;
1572  cb = ycbcr & 0xFF;
1573 
1574  b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
1575  g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
1576  r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
1577 
1578  return (r << 16) | (g << 8) | b;
1579 }
1580 
1582 {
1583  char buf[256] = {0};
1584  uint8_t *src = st->codec->extradata;
1585  int i;
1586 
1587  if (st->codec->extradata_size != 64)
1588  return 0;
1589 
1590  if (st->codec->width > 0 && st->codec->height > 0)
1591  snprintf(buf, sizeof(buf), "size: %dx%d\n",
1592  st->codec->width, st->codec->height);
1593  av_strlcat(buf, "palette: ", sizeof(buf));
1594 
1595  for (i = 0; i < 16; i++) {
1596  uint32_t yuv = AV_RB32(src + i * 4);
1597  uint32_t rgba = yuv_to_rgba(yuv);
1598 
1599  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1600  }
1601 
1602  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1603  return 0;
1604 
1605  av_freep(&st->codec->extradata);
1606  st->codec->extradata_size = 0;
1608  if (!st->codec->extradata)
1609  return AVERROR(ENOMEM);
1610  st->codec->extradata_size = strlen(buf);
1611  memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1612 
1613  return 0;
1614 }
1615 
1617  AVStream *st, MOVStreamContext *sc,
1618  int size)
1619 {
1620  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1621  if (ff_get_extradata(st->codec, pb, size) < 0)
1622  return AVERROR(ENOMEM);
1623  if (size > 16) {
1624  MOVStreamContext *tmcd_ctx = st->priv_data;
1625  int val;
1626  val = AV_RB32(st->codec->extradata + 4);
1627  tmcd_ctx->tmcd_flags = val;
1628  if (val & 1)
1630  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1631  st->codec->time_base.num = 1;
1632  if (size > 30) {
1633  uint32_t len = AV_RB32(st->codec->extradata + 18); /* name atom length */
1634  uint32_t format = AV_RB32(st->codec->extradata + 22);
1635  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
1636  uint16_t str_size = AV_RB16(st->codec->extradata + 26); /* string length */
1637  if (str_size > 0 && size >= (int)str_size + 26) {
1638  char *reel_name = av_malloc(str_size + 1);
1639  if (!reel_name)
1640  return AVERROR(ENOMEM);
1641  memcpy(reel_name, st->codec->extradata + 30, str_size);
1642  reel_name[str_size] = 0; /* Add null terminator */
1643  /* don't add reel_name if emtpy string */
1644  if (*reel_name == 0) {
1645  av_free(reel_name);
1646  } else {
1647  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
1648  }
1649  }
1650  }
1651  }
1652  }
1653  } else {
1654  /* other codec type, just skip (rtp, mp4s ...) */
1655  avio_skip(pb, size);
1656  }
1657  return 0;
1658 }
1659 
1661  AVStream *st, MOVStreamContext *sc)
1662 {
1663  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1664  !st->codec->sample_rate && sc->time_scale > 1)
1665  st->codec->sample_rate = sc->time_scale;
1666 
1667  /* special codec parameters handling */
1668  switch (st->codec->codec_id) {
1669 #if CONFIG_DV_DEMUXER
1670  case AV_CODEC_ID_DVAUDIO:
1673  if (!c->dv_demux) {
1674  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1675  return AVERROR(ENOMEM);
1676  }
1677  sc->dv_audio_container = 1;
1679  break;
1680 #endif
1681  /* no ifdef since parameters are always those */
1682  case AV_CODEC_ID_QCELP:
1683  st->codec->channels = 1;
1684  // force sample rate for qcelp when not stored in mov
1685  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1686  st->codec->sample_rate = 8000;
1687  // FIXME: Why is the following needed for some files?
1688  sc->samples_per_frame = 160;
1689  if (!sc->bytes_per_frame)
1690  sc->bytes_per_frame = 35;
1691  break;
1692  case AV_CODEC_ID_AMR_NB:
1693  st->codec->channels = 1;
1694  /* force sample rate for amr, stsd in 3gp does not store sample rate */
1695  st->codec->sample_rate = 8000;
1696  break;
1697  case AV_CODEC_ID_AMR_WB:
1698  st->codec->channels = 1;
1699  st->codec->sample_rate = 16000;
1700  break;
1701  case AV_CODEC_ID_MP2:
1702  case AV_CODEC_ID_MP3:
1703  /* force type after stsd for m1a hdlr */
1706  break;
1707  case AV_CODEC_ID_GSM:
1708  case AV_CODEC_ID_ADPCM_MS:
1710  case AV_CODEC_ID_ILBC:
1711  case AV_CODEC_ID_MACE3:
1712  case AV_CODEC_ID_MACE6:
1713  case AV_CODEC_ID_QDM2:
1714  st->codec->block_align = sc->bytes_per_frame;
1715  break;
1716  case AV_CODEC_ID_ALAC:
1717  if (st->codec->extradata_size == 36) {
1718  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1719  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1720  }
1721  break;
1722  case AV_CODEC_ID_AC3:
1723  case AV_CODEC_ID_EAC3:
1725  case AV_CODEC_ID_VC1:
1727  break;
1728  default:
1729  break;
1730  }
1731  return 0;
1732 }
1733 
1735  int codec_tag, int format,
1736  int64_t size)
1737 {
1738  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1739 
1740  if (codec_tag &&
1741  (codec_tag != format &&
1742  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1743  : codec_tag != MKTAG('j','p','e','g')))) {
1744  /* Multiple fourcc, we skip JPEG. This is not correct, we should
1745  * export it as a separate AVStream but this needs a few changes
1746  * in the MOV demuxer, patch welcome. */
1747 
1748  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1749  avio_skip(pb, size);
1750  return 1;
1751  }
1752  if ( codec_tag == AV_RL32("avc1") ||
1753  codec_tag == AV_RL32("hvc1") ||
1754  codec_tag == AV_RL32("hev1")
1755  )
1756  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
1757 
1758  return 0;
1759 }
1760 
1762 {
1763  AVStream *st;
1764  MOVStreamContext *sc;
1765  int pseudo_stream_id;
1766 
1767  if (c->fc->nb_streams < 1)
1768  return 0;
1769  st = c->fc->streams[c->fc->nb_streams-1];
1770  sc = st->priv_data;
1771 
1772  for (pseudo_stream_id = 0;
1773  pseudo_stream_id < entries && !pb->eof_reached;
1774  pseudo_stream_id++) {
1775  //Parsing Sample description table
1776  enum AVCodecID id;
1777  int ret, dref_id = 1;
1778  MOVAtom a = { AV_RL32("stsd") };
1779  int64_t start_pos = avio_tell(pb);
1780  int64_t size = avio_rb32(pb); /* size */
1781  uint32_t format = avio_rl32(pb); /* data format */
1782 
1783  if (size >= 16) {
1784  avio_rb32(pb); /* reserved */
1785  avio_rb16(pb); /* reserved */
1786  dref_id = avio_rb16(pb);
1787  }else if (size <= 7){
1788  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1789  return AVERROR_INVALIDDATA;
1790  }
1791 
1792  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1793  size - (avio_tell(pb) - start_pos)))
1794  continue;
1795 
1796  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1797  sc->dref_id= dref_id;
1798 
1799  id = mov_codec_id(st, format);
1800 
1801  av_dlog(c->fc, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1802  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1803  (format >> 24) & 0xff, st->codec->codec_type);
1804 
1805  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1806  st->codec->codec_id = id;
1807  mov_parse_stsd_video(c, pb, st, sc);
1808  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1809  st->codec->codec_id = id;
1810  mov_parse_stsd_audio(c, pb, st, sc);
1811  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1812  st->codec->codec_id = id;
1813  mov_parse_stsd_subtitle(c, pb, st, sc,
1814  size - (avio_tell(pb) - start_pos));
1815  } else {
1816  ret = mov_parse_stsd_data(c, pb, st, sc,
1817  size - (avio_tell(pb) - start_pos));
1818  if (ret < 0)
1819  return ret;
1820  }
1821  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1822  a.size = size - (avio_tell(pb) - start_pos);
1823  if (a.size > 8) {
1824  if ((ret = mov_read_default(c, pb, a)) < 0)
1825  return ret;
1826  } else if (a.size > 0)
1827  avio_skip(pb, a.size);
1828  }
1829 
1830  if (pb->eof_reached)
1831  return AVERROR_EOF;
1832 
1833  return mov_finalize_stsd_codec(c, pb, st, sc);
1834 }
1835 
1837 {
1838  int entries;
1839 
1840  avio_r8(pb); /* version */
1841  avio_rb24(pb); /* flags */
1842  entries = avio_rb32(pb);
1843 
1844  return ff_mov_read_stsd_entries(c, pb, entries);
1845 }
1846 
1848 {
1849  AVStream *st;
1850  MOVStreamContext *sc;
1851  unsigned int i, entries;
1852 
1853  if (c->fc->nb_streams < 1)
1854  return 0;
1855  st = c->fc->streams[c->fc->nb_streams-1];
1856  sc = st->priv_data;
1857 
1858  avio_r8(pb); /* version */
1859  avio_rb24(pb); /* flags */
1860 
1861  entries = avio_rb32(pb);
1862 
1863  av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1864 
1865  if (!entries)
1866  return 0;
1867  if (sc->stsc_data)
1868  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
1869  av_free(sc->stsc_data);
1870  sc->stsc_count = 0;
1871  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
1872  if (!sc->stsc_data)
1873  return AVERROR(ENOMEM);
1874 
1875  for (i = 0; i < entries && !pb->eof_reached; i++) {
1876  sc->stsc_data[i].first = avio_rb32(pb);
1877  sc->stsc_data[i].count = avio_rb32(pb);
1878  sc->stsc_data[i].id = avio_rb32(pb);
1879  }
1880 
1881  sc->stsc_count = i;
1882 
1883  if (pb->eof_reached)
1884  return AVERROR_EOF;
1885 
1886  return 0;
1887 }
1888 
1890 {
1891  AVStream *st;
1892  MOVStreamContext *sc;
1893  unsigned i, entries;
1894 
1895  if (c->fc->nb_streams < 1)
1896  return 0;
1897  st = c->fc->streams[c->fc->nb_streams-1];
1898  sc = st->priv_data;
1899 
1900  avio_rb32(pb); // version + flags
1901 
1902  entries = avio_rb32(pb);
1903  if (sc->stps_data)
1904  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
1905  av_free(sc->stps_data);
1906  sc->stps_count = 0;
1907  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
1908  if (!sc->stps_data)
1909  return AVERROR(ENOMEM);
1910 
1911  for (i = 0; i < entries && !pb->eof_reached; i++) {
1912  sc->stps_data[i] = avio_rb32(pb);
1913  //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1914  }
1915 
1916  sc->stps_count = i;
1917 
1918  if (pb->eof_reached)
1919  return AVERROR_EOF;
1920 
1921  return 0;
1922 }
1923 
1925 {
1926  AVStream *st;
1927  MOVStreamContext *sc;
1928  unsigned int i, entries;
1929 
1930  if (c->fc->nb_streams < 1)
1931  return 0;
1932  st = c->fc->streams[c->fc->nb_streams-1];
1933  sc = st->priv_data;
1934 
1935  avio_r8(pb); /* version */
1936  avio_rb24(pb); /* flags */
1937 
1938  entries = avio_rb32(pb);
1939 
1940  av_dlog(c->fc, "keyframe_count = %d\n", entries);
1941 
1942  if (!entries)
1943  {
1944  sc->keyframe_absent = 1;
1945  if (!st->need_parsing && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1947  return 0;
1948  }
1949  if (sc->keyframes)
1950  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
1951  av_free(sc->keyframes);
1952  sc->keyframe_count = 0;
1953  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
1954  if (!sc->keyframes)
1955  return AVERROR(ENOMEM);
1956 
1957  for (i = 0; i < entries && !pb->eof_reached; i++) {
1958  sc->keyframes[i] = avio_rb32(pb);
1959  //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1960  }
1961 
1962  sc->keyframe_count = i;
1963 
1964  if (pb->eof_reached)
1965  return AVERROR_EOF;
1966 
1967  return 0;
1968 }
1969 
1971 {
1972  AVStream *st;
1973  MOVStreamContext *sc;
1974  unsigned int i, entries, sample_size, field_size, num_bytes;
1975  GetBitContext gb;
1976  unsigned char* buf;
1977 
1978  if (c->fc->nb_streams < 1)
1979  return 0;
1980  st = c->fc->streams[c->fc->nb_streams-1];
1981  sc = st->priv_data;
1982 
1983  avio_r8(pb); /* version */
1984  avio_rb24(pb); /* flags */
1985 
1986  if (atom.type == MKTAG('s','t','s','z')) {
1987  sample_size = avio_rb32(pb);
1988  if (!sc->sample_size) /* do not overwrite value computed in stsd */
1989  sc->sample_size = sample_size;
1990  sc->stsz_sample_size = sample_size;
1991  field_size = 32;
1992  } else {
1993  sample_size = 0;
1994  avio_rb24(pb); /* reserved */
1995  field_size = avio_r8(pb);
1996  }
1997  entries = avio_rb32(pb);
1998 
1999  av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2000 
2001  sc->sample_count = entries;
2002  if (sample_size)
2003  return 0;
2004 
2005  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2006  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2007  return AVERROR_INVALIDDATA;
2008  }
2009 
2010  if (!entries)
2011  return 0;
2012  if (entries >= (UINT_MAX - 4) / field_size)
2013  return AVERROR_INVALIDDATA;
2014  if (sc->sample_sizes)
2015  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2016  av_free(sc->sample_sizes);
2017  sc->sample_count = 0;
2018  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2019  if (!sc->sample_sizes)
2020  return AVERROR(ENOMEM);
2021 
2022  num_bytes = (entries*field_size+4)>>3;
2023 
2024  buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
2025  if (!buf) {
2026  av_freep(&sc->sample_sizes);
2027  return AVERROR(ENOMEM);
2028  }
2029 
2030  if (avio_read(pb, buf, num_bytes) < num_bytes) {
2031  av_freep(&sc->sample_sizes);
2032  av_free(buf);
2033  return AVERROR_INVALIDDATA;
2034  }
2035 
2036  init_get_bits(&gb, buf, 8*num_bytes);
2037 
2038  for (i = 0; i < entries && !pb->eof_reached; i++) {
2039  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2040  sc->data_size += sc->sample_sizes[i];
2041  }
2042 
2043  sc->sample_count = i;
2044 
2045  if (pb->eof_reached)
2046  return AVERROR_EOF;
2047 
2048  av_free(buf);
2049  return 0;
2050 }
2051 
2053 {
2054  AVStream *st;
2055  MOVStreamContext *sc;
2056  unsigned int i, entries;
2057  int64_t duration=0;
2058  int64_t total_sample_count=0;
2059 
2060  if (c->fc->nb_streams < 1)
2061  return 0;
2062  st = c->fc->streams[c->fc->nb_streams-1];
2063  sc = st->priv_data;
2064 
2065  avio_r8(pb); /* version */
2066  avio_rb24(pb); /* flags */
2067  entries = avio_rb32(pb);
2068 
2069  av_dlog(c->fc, "track[%i].stts.entries = %i\n",
2070  c->fc->nb_streams-1, entries);
2071 
2072  if (sc->stts_data)
2073  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2074  av_free(sc->stts_data);
2075  sc->stts_count = 0;
2076  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2077  if (!sc->stts_data)
2078  return AVERROR(ENOMEM);
2079 
2080  for (i = 0; i < entries && !pb->eof_reached; i++) {
2081  int sample_duration;
2082  int sample_count;
2083 
2084  sample_count=avio_rb32(pb);
2085  sample_duration = avio_rb32(pb);
2086 
2087  /* sample_duration < 0 is invalid based on the spec */
2088  if (sample_duration < 0) {
2089  av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta %d in STTS, at %d st:%d\n",
2090  sample_duration, i, c->fc->nb_streams-1);
2091  sample_duration = 1;
2092  }
2093  if (sample_count < 0) {
2094  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2095  return AVERROR_INVALIDDATA;
2096  }
2097  sc->stts_data[i].count= sample_count;
2098  sc->stts_data[i].duration= sample_duration;
2099 
2100  av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
2101  sample_count, sample_duration);
2102 
2103  if ( i+1 == entries
2104  && i
2105  && sample_count == 1
2106  && total_sample_count > 100
2107  && sample_duration/10 > duration / total_sample_count)
2108  sample_duration = duration / total_sample_count;
2109  duration+=(int64_t)sample_duration*sample_count;
2110  total_sample_count+=sample_count;
2111  }
2112 
2113  sc->stts_count = i;
2114 
2115  sc->duration_for_fps += duration;
2116  sc->nb_frames_for_fps += total_sample_count;
2117 
2118  if (pb->eof_reached)
2119  return AVERROR_EOF;
2120 
2121  st->nb_frames= total_sample_count;
2122  if (duration)
2123  st->duration= duration;
2124  sc->track_end = duration;
2125  return 0;
2126 }
2127 
2129 {
2130  if (duration < 0) {
2131  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2132  }
2133 }
2134 
2136 {
2137  AVStream *st;
2138  MOVStreamContext *sc;
2139  unsigned int i, entries;
2140 
2141  if (c->fc->nb_streams < 1)
2142  return 0;
2143  st = c->fc->streams[c->fc->nb_streams-1];
2144  sc = st->priv_data;
2145 
2146  avio_r8(pb); /* version */
2147  avio_rb24(pb); /* flags */
2148  entries = avio_rb32(pb);
2149 
2150  av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2151 
2152  if (!entries)
2153  return 0;
2154  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2155  return AVERROR_INVALIDDATA;
2156  sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
2157  if (!sc->ctts_data)
2158  return AVERROR(ENOMEM);
2159 
2160  for (i = 0; i < entries && !pb->eof_reached; i++) {
2161  int count =avio_rb32(pb);
2162  int duration =avio_rb32(pb);
2163 
2164  sc->ctts_data[i].count = count;
2165  sc->ctts_data[i].duration= duration;
2166 
2167  av_dlog(c->fc, "count=%d, duration=%d\n",
2168  count, duration);
2169 
2170  if (FFABS(duration) > (1<<28) && i+2<entries) {
2171  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2172  av_freep(&sc->ctts_data);
2173  sc->ctts_count = 0;
2174  return 0;
2175  }
2176 
2177  if (i+2<entries)
2178  mov_update_dts_shift(sc, duration);
2179  }
2180 
2181  sc->ctts_count = i;
2182 
2183  if (pb->eof_reached)
2184  return AVERROR_EOF;
2185 
2186  av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
2187 
2188  return 0;
2189 }
2190 
2192 {
2193  AVStream *st;
2194  MOVStreamContext *sc;
2195  unsigned int i, entries;
2196  uint8_t version;
2197  uint32_t grouping_type;
2198 
2199  if (c->fc->nb_streams < 1)
2200  return 0;
2201  st = c->fc->streams[c->fc->nb_streams-1];
2202  sc = st->priv_data;
2203 
2204  version = avio_r8(pb); /* version */
2205  avio_rb24(pb); /* flags */
2206  grouping_type = avio_rl32(pb);
2207  if (grouping_type != MKTAG( 'r','a','p',' '))
2208  return 0; /* only support 'rap ' grouping */
2209  if (version == 1)
2210  avio_rb32(pb); /* grouping_type_parameter */
2211 
2212  entries = avio_rb32(pb);
2213  if (!entries)
2214  return 0;
2215  if (sc->rap_group)
2216  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2217  av_free(sc->rap_group);
2218  sc->rap_group_count = 0;
2219  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2220  if (!sc->rap_group)
2221  return AVERROR(ENOMEM);
2222 
2223  for (i = 0; i < entries && !pb->eof_reached; i++) {
2224  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2225  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2226  }
2227 
2228  sc->rap_group_count = i;
2229 
2230  return pb->eof_reached ? AVERROR_EOF : 0;
2231 }
2232 
2233 static void mov_build_index(MOVContext *mov, AVStream *st)
2234 {
2235  MOVStreamContext *sc = st->priv_data;
2236  int64_t current_offset;
2237  int64_t current_dts = 0;
2238  unsigned int stts_index = 0;
2239  unsigned int stsc_index = 0;
2240  unsigned int stss_index = 0;
2241  unsigned int stps_index = 0;
2242  unsigned int i, j;
2243  uint64_t stream_size = 0;
2244 
2245  /* adjust first dts according to edit list */
2246  if ((sc->empty_duration || sc->start_time) && mov->time_scale > 0) {
2247  if (sc->empty_duration)
2249  sc->time_offset = sc->start_time - sc->empty_duration;
2250  current_dts = -sc->time_offset;
2251  if (sc->ctts_count>0 && sc->stts_count>0 &&
2252  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2253  /* more than 16 frames delay, dts are likely wrong
2254  this happens with files created by iMovie */
2255  sc->wrong_dts = 1;
2256  st->codec->has_b_frames = 1;
2257  }
2258  }
2259 
2260  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2261  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2262  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2263  unsigned int current_sample = 0;
2264  unsigned int stts_sample = 0;
2265  unsigned int sample_size;
2266  unsigned int distance = 0;
2267  unsigned int rap_group_index = 0;
2268  unsigned int rap_group_sample = 0;
2269  int rap_group_present = sc->rap_group_count && sc->rap_group;
2270  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2271 
2272  current_dts -= sc->dts_shift;
2273 
2274  if (!sc->sample_count || st->nb_index_entries)
2275  return;
2276  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2277  return;
2279  st->nb_index_entries + sc->sample_count,
2280  sizeof(*st->index_entries)) < 0) {
2281  st->nb_index_entries = 0;
2282  return;
2283  }
2285 
2286  for (i = 0; i < sc->chunk_count; i++) {
2287  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2288  current_offset = sc->chunk_offsets[i];
2289  while (stsc_index + 1 < sc->stsc_count &&
2290  i + 1 == sc->stsc_data[stsc_index + 1].first)
2291  stsc_index++;
2292 
2293  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2294  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2295  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2296  sc->stsz_sample_size = sc->sample_size;
2297  }
2298  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2299  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2300  sc->stsz_sample_size = sc->sample_size;
2301  }
2302 
2303  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2304  int keyframe = 0;
2305  if (current_sample >= sc->sample_count) {
2306  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2307  return;
2308  }
2309 
2310  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2311  keyframe = 1;
2312  if (stss_index + 1 < sc->keyframe_count)
2313  stss_index++;
2314  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2315  keyframe = 1;
2316  if (stps_index + 1 < sc->stps_count)
2317  stps_index++;
2318  }
2319  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2320  if (sc->rap_group[rap_group_index].index > 0)
2321  keyframe = 1;
2322  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2323  rap_group_sample = 0;
2324  rap_group_index++;
2325  }
2326  }
2327  if (sc->keyframe_absent
2328  && !sc->stps_count
2329  && !rap_group_present
2330  && (st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2331  keyframe = 1;
2332  if (keyframe)
2333  distance = 0;
2334  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2335  if (sc->pseudo_stream_id == -1 ||
2336  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2337  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2338  e->pos = current_offset;
2339  e->timestamp = current_dts;
2340  e->size = sample_size;
2341  e->min_distance = distance;
2342  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2343  av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2344  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2345  current_offset, current_dts, sample_size, distance, keyframe);
2346  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2347  ff_rfps_add_frame(mov->fc, st, current_dts);
2348  }
2349 
2350  current_offset += sample_size;
2351  stream_size += sample_size;
2352  current_dts += sc->stts_data[stts_index].duration;
2353  distance++;
2354  stts_sample++;
2355  current_sample++;
2356  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2357  stts_sample = 0;
2358  stts_index++;
2359  }
2360  }
2361  }
2362  if (st->duration > 0)
2363  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2364  } else {
2365  unsigned chunk_samples, total = 0;
2366 
2367  // compute total chunk count
2368  for (i = 0; i < sc->stsc_count; i++) {
2369  unsigned count, chunk_count;
2370 
2371  chunk_samples = sc->stsc_data[i].count;
2372  if (i != sc->stsc_count - 1 &&
2373  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2374  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2375  return;
2376  }
2377 
2378  if (sc->samples_per_frame >= 160) { // gsm
2379  count = chunk_samples / sc->samples_per_frame;
2380  } else if (sc->samples_per_frame > 1) {
2381  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2382  count = (chunk_samples+samples-1) / samples;
2383  } else {
2384  count = (chunk_samples+1023) / 1024;
2385  }
2386 
2387  if (i < sc->stsc_count - 1)
2388  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2389  else
2390  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2391  total += chunk_count * count;
2392  }
2393 
2394  av_dlog(mov->fc, "chunk count %d\n", total);
2395  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2396  return;
2398  st->nb_index_entries + total,
2399  sizeof(*st->index_entries)) < 0) {
2400  st->nb_index_entries = 0;
2401  return;
2402  }
2403  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2404 
2405  // populate index
2406  for (i = 0; i < sc->chunk_count; i++) {
2407  current_offset = sc->chunk_offsets[i];
2408  if (stsc_index + 1 < sc->stsc_count &&
2409  i + 1 == sc->stsc_data[stsc_index + 1].first)
2410  stsc_index++;
2411  chunk_samples = sc->stsc_data[stsc_index].count;
2412 
2413  while (chunk_samples > 0) {
2414  AVIndexEntry *e;
2415  unsigned size, samples;
2416 
2417  if (sc->samples_per_frame >= 160) { // gsm
2418  samples = sc->samples_per_frame;
2419  size = sc->bytes_per_frame;
2420  } else {
2421  if (sc->samples_per_frame > 1) {
2422  samples = FFMIN((1024 / sc->samples_per_frame)*
2423  sc->samples_per_frame, chunk_samples);
2424  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2425  } else {
2426  samples = FFMIN(1024, chunk_samples);
2427  size = samples * sc->sample_size;
2428  }
2429  }
2430 
2431  if (st->nb_index_entries >= total) {
2432  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2433  return;
2434  }
2435  e = &st->index_entries[st->nb_index_entries++];
2436  e->pos = current_offset;
2437  e->timestamp = current_dts;
2438  e->size = size;
2439  e->min_distance = 0;
2440  e->flags = AVINDEX_KEYFRAME;
2441  av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2442  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2443  size, samples);
2444 
2445  current_offset += size;
2446  current_dts += samples;
2447  chunk_samples -= samples;
2448  }
2449  }
2450  }
2451 }
2452 
2453 static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
2454  AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
2455 {
2456  /* try relative path, we do not try the absolute because it can leak information about our
2457  system to an attacker */
2458  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2459  char filename[1024];
2460  const char *src_path;
2461  int i, l;
2462 
2463  /* find a source dir */
2464  src_path = strrchr(src, '/');
2465  if (src_path)
2466  src_path++;
2467  else
2468  src_path = src;
2469 
2470  /* find a next level down to target */
2471  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2472  if (ref->path[l] == '/') {
2473  if (i == ref->nlvl_to - 1)
2474  break;
2475  else
2476  i++;
2477  }
2478 
2479  /* compose filename if next level down to target was found */
2480  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2481  memcpy(filename, src, src_path - src);
2482  filename[src_path - src] = 0;
2483 
2484  for (i = 1; i < ref->nlvl_from; i++)
2485  av_strlcat(filename, "../", 1024);
2486 
2487  av_strlcat(filename, ref->path + l + 1, 1024);
2488 
2489  if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2490  return 0;
2491  }
2492  } else if (use_absolute_path) {
2493  av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
2494  "this is a possible security issue\n");
2495  if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2496  return 0;
2497  }
2498 
2499  return AVERROR(ENOENT);
2500 }
2501 
2503 {
2504  if (sc->time_scale <= 0) {
2505  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2506  sc->time_scale = c->time_scale;
2507  if (sc->time_scale <= 0)
2508  sc->time_scale = 1;
2509  }
2510 }
2511 
2513 {
2514  AVStream *st;
2515  MOVStreamContext *sc;
2516  int ret;
2517 
2518  st = avformat_new_stream(c->fc, NULL);
2519  if (!st) return AVERROR(ENOMEM);
2520  st->id = c->fc->nb_streams;
2521  sc = av_mallocz(sizeof(MOVStreamContext));
2522  if (!sc) return AVERROR(ENOMEM);
2523 
2524  st->priv_data = sc;
2526  sc->ffindex = st->index;
2527 
2528  if ((ret = mov_read_default(c, pb, atom)) < 0)
2529  return ret;
2530 
2531  /* sanity checks */
2532  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2533  (!sc->sample_size && !sc->sample_count))) {
2534  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2535  st->index);
2536  return 0;
2537  }
2538 
2539  fix_timescale(c, sc);
2540 
2541  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2542 
2543  mov_build_index(c, st);
2544 
2545  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2546  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2547  if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
2548  c->use_absolute_path, c->fc) < 0)
2549  av_log(c->fc, AV_LOG_ERROR,
2550  "stream %d, error opening alias: path='%s', dir='%s', "
2551  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2552  st->index, dref->path, dref->dir, dref->filename,
2553  dref->volume, dref->nlvl_from, dref->nlvl_to);
2554  } else {
2555  sc->pb = c->fc->pb;
2556  sc->pb_is_copied = 1;
2557  }
2558 
2559  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2560  if (!st->sample_aspect_ratio.num &&
2561  (st->codec->width != sc->width || st->codec->height != sc->height)) {
2562  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2563  ((double)st->codec->width * sc->height), INT_MAX);
2564  }
2565 
2566 #if FF_API_R_FRAME_RATE
2567  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2569  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2570 #endif
2571  }
2572 
2573  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2574  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2575  TAG_IS_AVCI(st->codec->codec_tag)) {
2576  ret = ff_generate_avci_extradata(st);
2577  if (ret < 0)
2578  return ret;
2579  }
2580 
2581  switch (st->codec->codec_id) {
2582 #if CONFIG_H261_DECODER
2583  case AV_CODEC_ID_H261:
2584 #endif
2585 #if CONFIG_H263_DECODER
2586  case AV_CODEC_ID_H263:
2587 #endif
2588 #if CONFIG_MPEG4_DECODER
2589  case AV_CODEC_ID_MPEG4:
2590 #endif
2591  st->codec->width = 0; /* let decoder init width/height */
2592  st->codec->height= 0;
2593  break;
2594  }
2595 
2596  /* Do not need those anymore. */
2597  av_freep(&sc->chunk_offsets);
2598  av_freep(&sc->stsc_data);
2599  av_freep(&sc->sample_sizes);
2600  av_freep(&sc->keyframes);
2601  av_freep(&sc->stts_data);
2602  av_freep(&sc->stps_data);
2603  av_freep(&sc->rap_group);
2604 
2605  return 0;
2606 }
2607 
2609 {
2610  int ret;
2611  c->itunes_metadata = 1;
2612  ret = mov_read_default(c, pb, atom);
2613  c->itunes_metadata = 0;
2614  return ret;
2615 }
2616 
2618 {
2619  int64_t end = avio_tell(pb) + size;
2620  uint8_t *key = NULL, *val = NULL;
2621  int i;
2622  AVStream *st;
2623  MOVStreamContext *sc;
2624 
2625  if (c->fc->nb_streams < 1)
2626  return 0;
2627  st = c->fc->streams[c->fc->nb_streams-1];
2628  sc = st->priv_data;
2629 
2630  for (i = 0; i < 2; i++) {
2631  uint8_t **p;
2632  uint32_t len, tag;
2633 
2634  if (end - avio_tell(pb) <= 12)
2635  break;
2636 
2637  len = avio_rb32(pb);
2638  tag = avio_rl32(pb);
2639  avio_skip(pb, 4); // flags
2640 
2641  if (len < 12 || len - 12 > end - avio_tell(pb))
2642  break;
2643  len -= 12;
2644 
2645  if (tag == MKTAG('n', 'a', 'm', 'e'))
2646  p = &key;
2647  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
2648  avio_skip(pb, 4);
2649  len -= 4;
2650  p = &val;
2651  } else
2652  break;
2653 
2654  *p = av_malloc(len + 1);
2655  if (!*p)
2656  break;
2657  avio_read(pb, *p, len);
2658  (*p)[len] = 0;
2659  }
2660 
2661  if (key && val) {
2662  if (strcmp(key, "iTunSMPB") == 0) {
2663  int priming, remainder, samples;
2664  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
2665  if(priming>0 && priming<16384)
2666  sc->start_pad = priming;
2667  }
2668  }
2669  if (strcmp(key, "cdec") != 0) {
2670  av_dict_set(&c->fc->metadata, key, val,
2672  key = val = NULL;
2673  }
2674  }
2675 
2676  avio_seek(pb, end, SEEK_SET);
2677  av_freep(&key);
2678  av_freep(&val);
2679  return 0;
2680 }
2681 
2683 {
2684  int64_t end = avio_tell(pb) + atom.size;
2685  uint32_t tag, len;
2686 
2687  if (atom.size < 8)
2688  goto fail;
2689 
2690  len = avio_rb32(pb);
2691  tag = avio_rl32(pb);
2692 
2693  if (len > atom.size)
2694  goto fail;
2695 
2696  if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
2697  uint8_t domain[128];
2698  int domain_len;
2699 
2700  avio_skip(pb, 4); // flags
2701  len -= 12;
2702 
2703  domain_len = avio_get_str(pb, len, domain, sizeof(domain));
2704  avio_skip(pb, len - domain_len);
2705  return mov_read_custom_2plus(c, pb, end - avio_tell(pb));
2706  }
2707 
2708 fail:
2709  av_log(c->fc, AV_LOG_VERBOSE,
2710  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
2711  return 0;
2712 }
2713 
2715 {
2716  while (atom.size > 8) {
2717  uint32_t tag = avio_rl32(pb);
2718  atom.size -= 4;
2719  if (tag == MKTAG('h','d','l','r')) {
2720  avio_seek(pb, -8, SEEK_CUR);
2721  atom.size += 8;
2722  return mov_read_default(c, pb, atom);
2723  }
2724  }
2725  return 0;
2726 }
2727 
2729 {
2730  int i;
2731  int width;
2732  int height;
2733  int64_t disp_transform[2];
2734  int display_matrix[3][3];
2735  AVStream *st;
2736  MOVStreamContext *sc;
2737  int version;
2738  int flags;
2739 
2740  if (c->fc->nb_streams < 1)
2741  return 0;
2742  st = c->fc->streams[c->fc->nb_streams-1];
2743  sc = st->priv_data;
2744 
2745  version = avio_r8(pb);
2746  flags = avio_rb24(pb);
2748 
2749  if (version == 1) {
2750  avio_rb64(pb);
2751  avio_rb64(pb);
2752  } else {
2753  avio_rb32(pb); /* creation time */
2754  avio_rb32(pb); /* modification time */
2755  }
2756  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2757  avio_rb32(pb); /* reserved */
2758 
2759  /* highlevel (considering edits) duration in movie timebase */
2760  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2761  avio_rb32(pb); /* reserved */
2762  avio_rb32(pb); /* reserved */
2763 
2764  avio_rb16(pb); /* layer */
2765  avio_rb16(pb); /* alternate group */
2766  avio_rb16(pb); /* volume */
2767  avio_rb16(pb); /* reserved */
2768 
2769  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2770  // they're kept in fixed point format through all calculations
2771  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
2772  // side data, but the scale factor is not needed to calculate aspect ratio
2773  for (i = 0; i < 3; i++) {
2774  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2775  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2776  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
2777  }
2778 
2779  width = avio_rb32(pb); // 16.16 fixed point track width
2780  height = avio_rb32(pb); // 16.16 fixed point track height
2781  sc->width = width >> 16;
2782  sc->height = height >> 16;
2783 
2784  // save the matrix and add rotate metadata when it is not the default
2785  // identity
2786  if (display_matrix[0][0] != (1 << 16) ||
2787  display_matrix[1][1] != (1 << 16) ||
2788  display_matrix[2][2] != (1 << 30) ||
2789  display_matrix[0][1] || display_matrix[0][2] ||
2790  display_matrix[1][0] || display_matrix[1][2] ||
2791  display_matrix[2][0] || display_matrix[2][1]) {
2792  int i, j;
2793  double rotate;
2794 
2795  av_freep(&sc->display_matrix);
2796  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
2797  if (!sc->display_matrix)
2798  return AVERROR(ENOMEM);
2799 
2800  for (i = 0; i < 3; i++)
2801  for (j = 0; j < 3; j++)
2802  sc->display_matrix[i * 3 + j] = display_matrix[j][i];
2803 
2805  if (!isnan(rotate)) {
2806  char rotate_buf[64];
2807  rotate = -rotate;
2808  if (rotate < 0) // for backward compatibility
2809  rotate += 360;
2810  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
2811  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
2812  }
2813  }
2814 
2815  // transform the display width/height according to the matrix
2816  // skip this if the display matrix is the default identity matrix
2817  // or if it is rotating the picture, ex iPhone 3GS
2818  // to keep the same scale, use [width height 1<<16]
2819  if (width && height &&
2820  ((display_matrix[0][0] != 65536 ||
2821  display_matrix[1][1] != 65536) &&
2822  !display_matrix[0][1] &&
2823  !display_matrix[1][0] &&
2824  !display_matrix[2][0] && !display_matrix[2][1])) {
2825  for (i = 0; i < 2; i++)
2826  disp_transform[i] =
2827  (int64_t) width * display_matrix[0][i] +
2828  (int64_t) height * display_matrix[1][i] +
2829  ((int64_t) display_matrix[2][i] << 16);
2830 
2831  //sample aspect ratio is new width/height divided by old width/height
2833  ((double) disp_transform[0] * height) /
2834  ((double) disp_transform[1] * width), INT_MAX);
2835  }
2836  return 0;
2837 }
2838 
2840 {
2841  MOVFragment *frag = &c->fragment;
2842  MOVTrackExt *trex = NULL;
2843  MOVFragmentIndex* index = NULL;
2844  int flags, track_id, i;
2845 
2846  avio_r8(pb); /* version */
2847  flags = avio_rb24(pb);
2848 
2849  track_id = avio_rb32(pb);
2850  if (!track_id)
2851  return AVERROR_INVALIDDATA;
2852  frag->track_id = track_id;
2853  for (i = 0; i < c->trex_count; i++)
2854  if (c->trex_data[i].track_id == frag->track_id) {
2855  trex = &c->trex_data[i];
2856  break;
2857  }
2858  if (!trex) {
2859  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2860  return AVERROR_INVALIDDATA;
2861  }
2862  for (i = 0; i < c->fragment_index_count; i++) {
2863  MOVFragmentIndex* candidate = c->fragment_index_data[i];
2864  if (candidate->track_id == frag->track_id) {
2865  av_log(c->fc, AV_LOG_DEBUG,
2866  "found fragment index for track %u\n", frag->track_id);
2867  index = candidate;
2868  break;
2869  }
2870  }
2871 
2874  frag->moof_offset : frag->implicit_offset;
2875  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2876 
2877  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2878  avio_rb32(pb) : trex->duration;
2879  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2880  avio_rb32(pb) : trex->size;
2881  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2882  avio_rb32(pb) : trex->flags;
2883  frag->time = AV_NOPTS_VALUE;
2884  if (index) {
2885  int i, found = 0;
2886  for (i = index->current_item; i < index->item_count; i++) {
2887  if (frag->implicit_offset == index->items[i].moof_offset) {
2888  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
2889  "for track %u and moof_offset %"PRId64"\n",
2890  frag->track_id, index->items[i].moof_offset);
2891  frag->time = index->items[i].time;
2892  index->current_item = i + 1;
2893  found = 1;
2894  }
2895  }
2896  if (!found) {
2897  av_log(c->fc, AV_LOG_WARNING, "track %u has a fragment index "
2898  "but it doesn't have an (in-order) entry for moof_offset "
2899  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
2900  }
2901  }
2902  av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2903  return 0;
2904 }
2905 
2907 {
2908  c->chapter_track = avio_rb32(pb);
2909  return 0;
2910 }
2911 
2913 {
2914  MOVTrackExt *trex;
2915  int err;
2916 
2917  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2918  return AVERROR_INVALIDDATA;
2919  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2920  sizeof(*c->trex_data))) < 0) {
2921  c->trex_count = 0;
2922  return err;
2923  }
2924 
2925  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
2926 
2927  trex = &c->trex_data[c->trex_count++];
2928  avio_r8(pb); /* version */
2929  avio_rb24(pb); /* flags */
2930  trex->track_id = avio_rb32(pb);
2931  trex->stsd_id = avio_rb32(pb);
2932  trex->duration = avio_rb32(pb);
2933  trex->size = avio_rb32(pb);
2934  trex->flags = avio_rb32(pb);
2935  return 0;
2936 }
2937 
2939 {
2940  MOVFragment *frag = &c->fragment;
2941  AVStream *st = NULL;
2942  MOVStreamContext *sc;
2943  int version, i;
2944 
2945  for (i = 0; i < c->fc->nb_streams; i++) {
2946  if (c->fc->streams[i]->id == frag->track_id) {
2947  st = c->fc->streams[i];
2948  break;
2949  }
2950  }
2951  if (!st) {
2952  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2953  return AVERROR_INVALIDDATA;
2954  }
2955  sc = st->priv_data;
2956  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
2957  return 0;
2958  version = avio_r8(pb);
2959  avio_rb24(pb); /* flags */
2960  if (version) {
2961  sc->track_end = avio_rb64(pb);
2962  } else {
2963  sc->track_end = avio_rb32(pb);
2964  }
2965  return 0;
2966 }
2967 
2969 {
2970  MOVFragment *frag = &c->fragment;
2971  AVStream *st = NULL;
2972  MOVStreamContext *sc;
2973  MOVStts *ctts_data;
2974  uint64_t offset;
2975  int64_t dts;
2976  int data_offset = 0;
2977  unsigned entries, first_sample_flags = frag->flags;
2978  int flags, distance, i, found_keyframe = 0, err;
2979 
2980  for (i = 0; i < c->fc->nb_streams; i++) {
2981  if (c->fc->streams[i]->id == frag->track_id) {
2982  st = c->fc->streams[i];
2983  break;
2984  }
2985  }
2986  if (!st) {
2987  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2988  return AVERROR_INVALIDDATA;
2989  }
2990  sc = st->priv_data;
2991  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
2992  return 0;
2993  avio_r8(pb); /* version */
2994  flags = avio_rb24(pb);
2995  entries = avio_rb32(pb);
2996  av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2997 
2998  /* Always assume the presence of composition time offsets.
2999  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
3000  * 1) in the initial movie, there are no samples.
3001  * 2) in the first movie fragment, there is only one sample without composition time offset.
3002  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
3003  if (!sc->ctts_count && sc->sample_count)
3004  {
3005  /* Complement ctts table if moov atom doesn't have ctts atom. */
3006  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
3007  if (!ctts_data)
3008  return AVERROR(ENOMEM);
3009  sc->ctts_data = ctts_data;
3010  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
3011  sc->ctts_data[sc->ctts_count].duration = 0;
3012  sc->ctts_count++;
3013  }
3014  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
3015  return AVERROR_INVALIDDATA;
3016  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
3017  sizeof(*sc->ctts_data))) < 0) {
3018  sc->ctts_count = 0;
3019  return err;
3020  }
3021  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
3022  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
3023  dts = sc->track_end - sc->time_offset;
3024  offset = frag->base_data_offset + data_offset;
3025  distance = 0;
3026  av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
3027  for (i = 0; i < entries && !pb->eof_reached; i++) {
3028  unsigned sample_size = frag->size;
3029  int sample_flags = i ? frag->flags : first_sample_flags;
3030  unsigned sample_duration = frag->duration;
3031  int keyframe = 0;
3032 
3033  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
3034  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
3035  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
3036  sc->ctts_data[sc->ctts_count].count = 1;
3037  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
3038  avio_rb32(pb) : 0;
3040  if (frag->time != AV_NOPTS_VALUE) {
3041  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
3042  int64_t pts = frag->time;
3043  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3044  " sc->dts_shift %d ctts.duration %d"
3045  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
3046  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
3047  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
3048  dts = pts - sc->dts_shift;
3049  if (flags & MOV_TRUN_SAMPLE_CTS) {
3050  dts -= sc->ctts_data[sc->ctts_count].duration;
3051  } else {
3052  dts -= sc->time_offset;
3053  }
3054  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
3055  } else {
3056  dts = frag->time;
3057  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3058  ", using it for dts\n", dts);
3059  }
3060  frag->time = AV_NOPTS_VALUE;
3061  }
3062  sc->ctts_count++;
3063  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3064  keyframe = 1;
3065  else if (!found_keyframe)
3066  keyframe = found_keyframe =
3067  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
3069  if (keyframe)
3070  distance = 0;
3071  av_add_index_entry(st, offset, dts, sample_size, distance,
3072  keyframe ? AVINDEX_KEYFRAME : 0);
3073  av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3074  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
3075  offset, dts, sample_size, distance, keyframe);
3076  distance++;
3077  dts += sample_duration;
3078  offset += sample_size;
3079  sc->data_size += sample_size;
3080  sc->duration_for_fps += sample_duration;
3081  sc->nb_frames_for_fps ++;
3082  }
3083 
3084  if (pb->eof_reached)
3085  return AVERROR_EOF;
3086 
3087  frag->implicit_offset = offset;
3088  st->duration = sc->track_end = dts + sc->time_offset;
3089  return 0;
3090 }
3091 
3092 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
3093 /* like the files created with Adobe Premiere 5.0, for samples see */
3094 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
3096 {
3097  int err;
3098 
3099  if (atom.size < 8)
3100  return 0; /* continue */
3101  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
3102  avio_skip(pb, atom.size - 4);
3103  return 0;
3104  }
3105  atom.type = avio_rl32(pb);
3106  atom.size -= 8;
3107  if (atom.type != MKTAG('m','d','a','t')) {
3108  avio_skip(pb, atom.size);
3109  return 0;
3110  }
3111  err = mov_read_mdat(c, pb, atom);
3112  return err;
3113 }
3114 
3116 {
3117 #if CONFIG_ZLIB
3118  AVIOContext ctx;
3119  uint8_t *cmov_data;
3120  uint8_t *moov_data; /* uncompressed data */
3121  long cmov_len, moov_len;
3122  int ret = -1;
3123 
3124  avio_rb32(pb); /* dcom atom */
3125  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
3126  return AVERROR_INVALIDDATA;
3127  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
3128  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
3129  return AVERROR_INVALIDDATA;
3130  }
3131  avio_rb32(pb); /* cmvd atom */
3132  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
3133  return AVERROR_INVALIDDATA;
3134  moov_len = avio_rb32(pb); /* uncompressed size */
3135  cmov_len = atom.size - 6 * 4;
3136 
3137  cmov_data = av_malloc(cmov_len);
3138  if (!cmov_data)
3139  return AVERROR(ENOMEM);
3140  moov_data = av_malloc(moov_len);
3141  if (!moov_data) {
3142  av_free(cmov_data);
3143  return AVERROR(ENOMEM);
3144  }
3145  avio_read(pb, cmov_data, cmov_len);
3146  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
3147  goto free_and_return;
3148  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
3149  goto free_and_return;
3150  atom.type = MKTAG('m','o','o','v');
3151  atom.size = moov_len;
3152  ret = mov_read_default(c, &ctx, atom);
3153 free_and_return:
3154  av_free(moov_data);
3155  av_free(cmov_data);
3156  return ret;
3157 #else
3158  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
3159  return AVERROR(ENOSYS);
3160 #endif
3161 }
3162 
3163 /* edit list atom */
3165 {
3166  MOVStreamContext *sc;
3167  int i, edit_count, version, edit_start_index = 0;
3168  int unsupported = 0;
3169 
3170  if (c->fc->nb_streams < 1 || c->ignore_editlist)
3171  return 0;
3172  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
3173 
3174  version = avio_r8(pb); /* version */
3175  avio_rb24(pb); /* flags */
3176  edit_count = avio_rb32(pb); /* entries */
3177 
3178  if ((uint64_t)edit_count*12+8 > atom.size)
3179  return AVERROR_INVALIDDATA;
3180 
3181  av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3182  for (i=0; i<edit_count; i++){
3183  int64_t time;
3184  int64_t duration;
3185  int rate;
3186  if (version == 1) {
3187  duration = avio_rb64(pb);
3188  time = avio_rb64(pb);
3189  } else {
3190  duration = avio_rb32(pb); /* segment duration */
3191  time = (int32_t)avio_rb32(pb); /* media time */
3192  }
3193  rate = avio_rb32(pb);
3194  if (i == 0 && time == -1) {
3195  sc->empty_duration = duration;
3196  edit_start_index = 1;
3197  } else if (i == edit_start_index && time >= 0)
3198  sc->start_time = time;
3199  else
3200  unsupported = 1;
3201 
3202  av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3203  duration, time, rate / 65536.0);
3204  }
3205 
3206  if (unsupported)
3207  av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
3208  "a/v desync might occur, patch welcome\n");
3209 
3210  return 0;
3211 }
3212 
3214 {
3215  MOVStreamContext *sc;
3216 
3217  if (c->fc->nb_streams < 1)
3218  return AVERROR_INVALIDDATA;
3219  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3220  sc->timecode_track = avio_rb32(pb);
3221  return 0;
3222 }
3223 
3225 {
3226  int ret;
3227  uint8_t uuid[16];
3228  static const uint8_t uuid_isml_manifest[] = {
3229  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3230  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3231  };
3232 
3233  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3234  return AVERROR_INVALIDDATA;
3235 
3236  ret = avio_read(pb, uuid, sizeof(uuid));
3237  if (ret < 0) {
3238  return ret;
3239  } else if (ret != sizeof(uuid)) {
3240  return AVERROR_INVALIDDATA;
3241  }
3242  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3243  uint8_t *buffer, *ptr;
3244  char *endptr;
3245  size_t len = atom.size - sizeof(uuid);
3246 
3247  if (len < 4) {
3248  return AVERROR_INVALIDDATA;
3249  }
3250  ret = avio_skip(pb, 4); // zeroes
3251  len -= 4;
3252 
3253  buffer = av_mallocz(len + 1);
3254  if (!buffer) {
3255  return AVERROR(ENOMEM);
3256  }
3257  ret = avio_read(pb, buffer, len);
3258  if (ret < 0) {
3259  av_free(buffer);
3260  return ret;
3261  } else if (ret != len) {
3262  av_free(buffer);
3263  return AVERROR_INVALIDDATA;
3264  }
3265 
3266  ptr = buffer;
3267  while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
3268  ptr += sizeof("systemBitrate=\"") - 1;
3269  c->bitrates_count++;
3270  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3271  if (!c->bitrates) {
3272  c->bitrates_count = 0;
3273  av_free(buffer);
3274  return AVERROR(ENOMEM);
3275  }
3276  errno = 0;
3277  ret = strtol(ptr, &endptr, 10);
3278  if (ret < 0 || errno || *endptr != '"') {
3279  c->bitrates[c->bitrates_count - 1] = 0;
3280  } else {
3281  c->bitrates[c->bitrates_count - 1] = ret;
3282  }
3283  }
3284 
3285  av_free(buffer);
3286  }
3287  return 0;
3288 }
3289 
3291 {
3292  int ret;
3293  uint8_t content[16];
3294 
3295  if (atom.size < 8)
3296  return 0;
3297 
3298  ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
3299  if (ret < 0)
3300  return ret;
3301 
3302  if ( !c->found_moov
3303  && !c->found_mdat
3304  && !memcmp(content, "Anevia\x1A\x1A", 8)
3307  }
3308 
3309  return 0;
3310 }
3311 
3313 { MKTAG('A','C','L','R'), mov_read_avid },
3314 { MKTAG('A','P','R','G'), mov_read_avid },
3315 { MKTAG('A','A','L','P'), mov_read_avid },
3316 { MKTAG('A','R','E','S'), mov_read_ares },
3317 { MKTAG('a','v','s','s'), mov_read_avss },
3318 { MKTAG('c','h','p','l'), mov_read_chpl },
3319 { MKTAG('c','o','6','4'), mov_read_stco },
3320 { MKTAG('c','o','l','r'), mov_read_colr },
3321 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
3322 { MKTAG('d','i','n','f'), mov_read_default },
3323 { MKTAG('d','r','e','f'), mov_read_dref },
3324 { MKTAG('e','d','t','s'), mov_read_default },
3325 { MKTAG('e','l','s','t'), mov_read_elst },
3326 { MKTAG('e','n','d','a'), mov_read_enda },
3327 { MKTAG('f','i','e','l'), mov_read_fiel },
3328 { MKTAG('f','t','y','p'), mov_read_ftyp },
3329 { MKTAG('g','l','b','l'), mov_read_glbl },
3330 { MKTAG('h','d','l','r'), mov_read_hdlr },
3331 { MKTAG('i','l','s','t'), mov_read_ilst },
3332 { MKTAG('j','p','2','h'), mov_read_jp2h },
3333 { MKTAG('m','d','a','t'), mov_read_mdat },
3334 { MKTAG('m','d','h','d'), mov_read_mdhd },
3335 { MKTAG('m','d','i','a'), mov_read_default },
3336 { MKTAG('m','e','t','a'), mov_read_meta },
3337 { MKTAG('m','i','n','f'), mov_read_default },
3338 { MKTAG('m','o','o','f'), mov_read_moof },
3339 { MKTAG('m','o','o','v'), mov_read_moov },
3340 { MKTAG('m','v','e','x'), mov_read_default },
3341 { MKTAG('m','v','h','d'), mov_read_mvhd },
3342 { MKTAG('S','M','I',' '), mov_read_svq3 },
3343 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
3344 { MKTAG('a','v','c','C'), mov_read_glbl },
3345 { MKTAG('p','a','s','p'), mov_read_pasp },
3346 { MKTAG('s','t','b','l'), mov_read_default },
3347 { MKTAG('s','t','c','o'), mov_read_stco },
3348 { MKTAG('s','t','p','s'), mov_read_stps },
3349 { MKTAG('s','t','r','f'), mov_read_strf },
3350 { MKTAG('s','t','s','c'), mov_read_stsc },
3351 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
3352 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
3353 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
3354 { MKTAG('s','t','t','s'), mov_read_stts },
3355 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
3356 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
3357 { MKTAG('t','f','d','t'), mov_read_tfdt },
3358 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
3359 { MKTAG('t','r','a','k'), mov_read_trak },
3360 { MKTAG('t','r','a','f'), mov_read_default },
3361 { MKTAG('t','r','e','f'), mov_read_default },
3362 { MKTAG('t','m','c','d'), mov_read_tmcd },
3363 { MKTAG('c','h','a','p'), mov_read_chap },
3364 { MKTAG('t','r','e','x'), mov_read_trex },
3365 { MKTAG('t','r','u','n'), mov_read_trun },
3366 { MKTAG('u','d','t','a'), mov_read_default },
3367 { MKTAG('w','a','v','e'), mov_read_wave },
3368 { MKTAG('e','s','d','s'), mov_read_esds },
3369 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
3370 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
3371 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
3372 { MKTAG('w','f','e','x'), mov_read_wfex },
3373 { MKTAG('c','m','o','v'), mov_read_cmov },
3374 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
3375 { MKTAG('d','v','c','1'), mov_read_dvc1 },
3376 { MKTAG('s','b','g','p'), mov_read_sbgp },
3377 { MKTAG('h','v','c','C'), mov_read_glbl },
3378 { MKTAG('u','u','i','d'), mov_read_uuid },
3379 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
3380 { MKTAG('f','r','e','e'), mov_read_free },
3381 { MKTAG('-','-','-','-'), mov_read_custom },
3382 { 0, NULL }
3383 };
3384 
3386 {
3387  int64_t total_size = 0;
3388  MOVAtom a;
3389  int i;
3390 
3391  if (atom.size < 0)
3392  atom.size = INT64_MAX;
3393  while (total_size + 8 <= atom.size && !avio_feof(pb)) {
3394  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
3395  a.size = atom.size;
3396  a.type=0;
3397  if (atom.size >= 8) {
3398  a.size = avio_rb32(pb);
3399  a.type = avio_rl32(pb);
3400  if (a.type == MKTAG('f','r','e','e') &&
3401  a.size >= 8 &&
3402  c->moov_retry) {
3403  uint8_t buf[8];
3404  uint32_t *type = (uint32_t *)buf + 1;
3405  avio_read(pb, buf, 8);
3406  avio_seek(pb, -8, SEEK_CUR);
3407  if (*type == MKTAG('m','v','h','d') ||
3408  *type == MKTAG('c','m','o','v')) {
3409  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
3410  a.type = MKTAG('m','o','o','v');
3411  }
3412  }
3413  if (atom.type != MKTAG('r','o','o','t') &&
3414  atom.type != MKTAG('m','o','o','v'))
3415  {
3416  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
3417  {
3418  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
3419  avio_skip(pb, -8);
3420  return 0;
3421  }
3422  }
3423  total_size += 8;
3424  if (a.size == 1) { /* 64 bit extended size */
3425  a.size = avio_rb64(pb) - 8;
3426  total_size += 8;
3427  }
3428  }
3429  av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3430  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3431  if (a.size == 0) {
3432  a.size = atom.size - total_size + 8;
3433  }
3434  a.size -= 8;
3435  if (a.size < 0)
3436  break;
3437  a.size = FFMIN(a.size, atom.size - total_size);
3438 
3439  for (i = 0; mov_default_parse_table[i].type; i++)
3440  if (mov_default_parse_table[i].type == a.type) {
3441  parse = mov_default_parse_table[i].parse;
3442  break;
3443  }
3444 
3445  // container is user data
3446  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3447  atom.type == MKTAG('i','l','s','t')))
3449 
3450  if (!parse) { /* skip leaf atoms data */
3451  avio_skip(pb, a.size);
3452  } else {
3453  int64_t start_pos = avio_tell(pb);
3454  int64_t left;
3455  int err = parse(c, pb, a);
3456  if (err < 0)
3457  return err;
3458  if (c->found_moov && c->found_mdat &&
3459  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3460  start_pos + a.size == avio_size(pb))) {
3461  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3462  c->next_root_atom = start_pos + a.size;
3463  return 0;
3464  }
3465  left = a.size - avio_tell(pb) + start_pos;
3466  if (left > 0) /* skip garbage at atom end */
3467  avio_skip(pb, left);
3468  else if (left < 0) {
3469  av_log(c->fc, AV_LOG_WARNING,
3470  "overread end of atom '%.4s' by %"PRId64" bytes\n",
3471  (char*)&a.type, -left);
3472  avio_seek(pb, left, SEEK_CUR);
3473  }
3474  }
3475 
3476  total_size += a.size;
3477  }
3478 
3479  if (total_size < atom.size && atom.size < 0x7ffff)
3480  avio_skip(pb, atom.size - total_size);
3481 
3482  return 0;
3483 }
3484 
3485 static int mov_probe(AVProbeData *p)
3486 {
3487  int64_t offset;
3488  uint32_t tag;
3489  int score = 0;
3490  int moov_offset = -1;
3491 
3492  /* check file header */
3493  offset = 0;
3494  for (;;) {
3495  /* ignore invalid offset */
3496  if ((offset + 8) > (unsigned int)p->buf_size)
3497  break;
3498  tag = AV_RL32(p->buf + offset + 4);
3499  switch(tag) {
3500  /* check for obvious tags */
3501  case MKTAG('m','o','o','v'):
3502  moov_offset = offset + 4;
3503  case MKTAG('m','d','a','t'):
3504  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3505  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3506  case MKTAG('f','t','y','p'):
3507  if (AV_RB32(p->buf+offset) < 8 &&
3508  (AV_RB32(p->buf+offset) != 1 ||
3509  offset + 12 > (unsigned int)p->buf_size ||
3510  AV_RB64(p->buf+offset + 8) == 0)) {
3511  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3512  } else if (tag == MKTAG('f','t','y','p') &&
3513  AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')) {
3514  score = FFMAX(score, 5);
3515  } else {
3516  score = AVPROBE_SCORE_MAX;
3517  }
3518  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3519  break;
3520  /* those are more common words, so rate then a bit less */
3521  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3522  case MKTAG('w','i','d','e'):
3523  case MKTAG('f','r','e','e'):
3524  case MKTAG('j','u','n','k'):
3525  case MKTAG('p','i','c','t'):
3526  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3527  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3528  break;
3529  case MKTAG(0x82,0x82,0x7f,0x7d):
3530  case MKTAG('s','k','i','p'):
3531  case MKTAG('u','u','i','d'):
3532  case MKTAG('p','r','f','l'):
3533  /* if we only find those cause probedata is too small at least rate them */
3534  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3535  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3536  break;
3537  default:
3538  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3539  }
3540  }
3541  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3542  /* moov atom in the header - we should make sure that this is not a
3543  * MOV-packed MPEG-PS */
3544  offset = moov_offset;
3545 
3546  while(offset < (p->buf_size - 16)){ /* Sufficient space */
3547  /* We found an actual hdlr atom */
3548  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3549  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3550  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3551  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3552  /* We found a media handler reference atom describing an
3553  * MPEG-PS-in-MOV, return a
3554  * low score to force expanding the probe window until
3555  * mpegps_probe finds what it needs */
3556  return 5;
3557  }else
3558  /* Keep looking */
3559  offset+=2;
3560  }
3561  }
3562 
3563  return score;
3564 }
3565 
3566 // must be done after parsing all trak because there's no order requirement
3568 {
3569  MOVContext *mov = s->priv_data;
3570  AVStream *st = NULL;
3571  MOVStreamContext *sc;
3572  int64_t cur_pos;
3573  int i;
3574 
3575  for (i = 0; i < s->nb_streams; i++)
3576  if (s->streams[i]->id == mov->chapter_track) {
3577  st = s->streams[i];
3578  break;
3579  }
3580  if (!st) {
3581  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3582  return;
3583  }
3584 
3585  st->discard = AVDISCARD_ALL;
3586  sc = st->priv_data;
3587  cur_pos = avio_tell(sc->pb);
3588 
3589  for (i = 0; i < st->nb_index_entries; i++) {
3590  AVIndexEntry *sample = &st->index_entries[i];
3591  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3592  uint8_t *title;
3593  uint16_t ch;
3594  int len, title_len;
3595 
3596  if (end < sample->timestamp) {
3597  av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
3598  end = AV_NOPTS_VALUE;
3599  }
3600 
3601  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3602  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3603  goto finish;
3604  }
3605 
3606  // the first two bytes are the length of the title
3607  len = avio_rb16(sc->pb);
3608  if (len > sample->size-2)
3609  continue;
3610  title_len = 2*len + 1;
3611  if (!(title = av_mallocz(title_len)))
3612  goto finish;
3613 
3614  // The samples could theoretically be in any encoding if there's an encd
3615  // atom following, but in practice are only utf-8 or utf-16, distinguished
3616  // instead by the presence of a BOM
3617  if (!len) {
3618  title[0] = 0;
3619  } else {
3620  ch = avio_rb16(sc->pb);
3621  if (ch == 0xfeff)
3622  avio_get_str16be(sc->pb, len, title, title_len);
3623  else if (ch == 0xfffe)
3624  avio_get_str16le(sc->pb, len, title, title_len);
3625  else {
3626  AV_WB16(title, ch);
3627  if (len == 1 || len == 2)
3628  title[len] = 0;
3629  else
3630  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3631  }
3632  }
3633 
3634  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3635  av_freep(&title);
3636  }
3637 finish:
3638  avio_seek(sc->pb, cur_pos, SEEK_SET);
3639 }
3640 
3642  uint32_t value, int flags)
3643 {
3644  AVTimecode tc;
3645  char buf[AV_TIMECODE_STR_SIZE];
3646  AVRational rate = {st->codec->time_base.den,
3647  st->codec->time_base.num};
3648  int ret = av_timecode_init(&tc, rate, flags, 0, s);
3649  if (ret < 0)
3650  return ret;
3651  av_dict_set(&st->metadata, "timecode",
3652  av_timecode_make_string(&tc, buf, value), 0);
3653  return 0;
3654 }
3655 
3657 {
3658  MOVStreamContext *sc = st->priv_data;
3659  int flags = 0;
3660  int64_t cur_pos = avio_tell(sc->pb);
3661  uint32_t value;
3662 
3663  if (!st->nb_index_entries)
3664  return -1;
3665 
3666  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3667  value = avio_rb32(s->pb);
3668 
3669  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3670  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3671  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3672 
3673  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3674  * not the case) and thus assume "frame number format" instead of QT one.
3675  * No sample with tmcd track can be found with a QT timecode at the moment,
3676  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3677  * format). */
3678  parse_timecode_in_framenum_format(s, st, value, flags);
3679 
3680  avio_seek(sc->pb, cur_pos, SEEK_SET);
3681  return 0;
3682 }
3683 
3685 {
3686  MOVContext *mov = s->priv_data;
3687  int i, j;
3688 
3689  for (i = 0; i < s->nb_streams; i++) {
3690  AVStream *st = s->streams[i];
3691  MOVStreamContext *sc = st->priv_data;
3692 
3693  av_freep(&sc->ctts_data);
3694  for (j = 0; j < sc->drefs_count; j++) {
3695  av_freep(&sc->drefs[j].path);
3696  av_freep(&sc->drefs[j].dir);
3697  }
3698  av_freep(&sc->drefs);
3699 
3700  sc->drefs_count = 0;
3701 
3702  if (!sc->pb_is_copied)
3703  avio_close(sc->pb);
3704 
3705  sc->pb = NULL;
3706  av_freep(&sc->chunk_offsets);
3707  av_freep(&sc->stsc_data);
3708  av_freep(&sc->sample_sizes);
3709  av_freep(&sc->keyframes);
3710  av_freep(&sc->stts_data);
3711  av_freep(&sc->stps_data);
3712  av_freep(&sc->rap_group);
3713  av_freep(&sc->display_matrix);
3714  }
3715 
3716  if (mov->dv_demux) {
3718  mov->dv_fctx = NULL;
3719  }
3720 
3721  av_freep(&mov->trex_data);
3722  av_freep(&mov->bitrates);
3723 
3724  for (i = 0; i < mov->fragment_index_count; i++) {
3726  av_freep(&index->items);
3727  av_freep(&mov->fragment_index_data[i]);
3728  }
3730 
3731  return 0;
3732 }
3733 
3734 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
3735 {
3736  int i;
3737 
3738  for (i = 0; i < s->nb_streams; i++) {
3739  AVStream *st = s->streams[i];
3740  MOVStreamContext *sc = st->priv_data;
3741 
3742  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3743  sc->timecode_track == tmcd_id)
3744  return 1;
3745  }
3746  return 0;
3747 }
3748 
3749 /* look for a tmcd track not referenced by any video track, and export it globally */
3751 {
3752  int i;
3753 
3754  for (i = 0; i < s->nb_streams; i++) {
3755  AVStream *st = s->streams[i];
3756 
3757  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
3758  !tmcd_is_referenced(s, i + 1)) {
3759  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
3760  if (tcr) {
3761  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
3762  break;
3763  }
3764  }
3765  }
3766 }
3767 
3768 static int read_tfra(MOVContext *mov, AVIOContext *f)
3769 {
3770  MOVFragmentIndex* index = NULL;
3771  int version, fieldlength, i, j, err;
3772  int64_t pos = avio_tell(f);
3773  uint32_t size = avio_rb32(f);
3774  if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a')) {
3775  return -1;
3776  }
3777  av_log(mov->fc, AV_LOG_VERBOSE, "found tfra\n");
3778  index = av_mallocz(sizeof(MOVFragmentIndex));
3779  if (!index) {
3780  return AVERROR(ENOMEM);
3781  }
3782  mov->fragment_index_count++;
3783  if ((err = av_reallocp(&mov->fragment_index_data,
3784  mov->fragment_index_count *
3785  sizeof(MOVFragmentIndex*))) < 0) {
3786  av_freep(&index);
3787  return err;
3788  }
3789  mov->fragment_index_data[mov->fragment_index_count - 1] =
3790  index;
3791 
3792  version = avio_r8(f);
3793  avio_rb24(f);
3794  index->track_id = avio_rb32(f);
3795  fieldlength = avio_rb32(f);
3796  index->item_count = avio_rb32(f);
3797  index->items = av_mallocz(
3798  index->item_count * sizeof(MOVFragmentIndexItem));
3799  if (!index->items) {
3800  return AVERROR(ENOMEM);
3801  }
3802  for (i = 0; i < index->item_count; i++) {
3803  int64_t time, offset;
3804  if (version == 1) {
3805  time = avio_rb64(f);
3806  offset = avio_rb64(f);
3807  } else {
3808  time = avio_rb32(f);
3809  offset = avio_rb32(f);
3810  }
3811  index->items[i].time = time;
3812  index->items[i].moof_offset = offset;
3813  for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
3814  avio_r8(f);
3815  for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
3816  avio_r8(f);
3817  for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
3818  avio_r8(f);
3819  }
3820 
3821  avio_seek(f, pos + size, SEEK_SET);
3822  return 0;
3823 }
3824 
3826 {
3827  int64_t stream_size = avio_size(f);
3828  int64_t original_pos = avio_tell(f);
3829  int64_t seek_ret;
3830  int32_t mfra_size;
3831  int ret = -1;
3832  if ((seek_ret = avio_seek(f, stream_size - 4, SEEK_SET)) < 0) {
3833  ret = seek_ret;
3834  goto fail;
3835  }
3836  mfra_size = avio_rb32(f);
3837  if (mfra_size < 0 || mfra_size > stream_size) {
3838  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (unreasonable size)\n");
3839  goto fail;
3840  }
3841  if ((seek_ret = avio_seek(f, -mfra_size, SEEK_CUR)) < 0) {
3842  ret = seek_ret;
3843  goto fail;
3844  }
3845  if (avio_rb32(f) != mfra_size) {
3846  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (size mismatch)\n");
3847  goto fail;
3848  }
3849  if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
3850  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (tag mismatch)\n");
3851  goto fail;
3852  }
3853  ret = 0;
3854  av_log(c->fc, AV_LOG_VERBOSE, "stream has mfra\n");
3855  while (!read_tfra(c, f)) {
3856  /* Empty */
3857  }
3858 fail:
3859  seek_ret = avio_seek(f, original_pos, SEEK_SET);
3860  if (seek_ret < 0) {
3861  av_log(c->fc, AV_LOG_ERROR,
3862  "failed to seek back after looking for mfra\n");
3863  ret = seek_ret;
3864  }
3865  return ret;
3866 }
3867 
3869 {
3870  MOVContext *mov = s->priv_data;
3871  AVIOContext *pb = s->pb;
3872  int j, err;
3873  MOVAtom atom = { AV_RL32("root") };
3874  int i;
3875 
3876  mov->fc = s;
3877  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
3878  if (pb->seekable)
3879  atom.size = avio_size(pb);
3880  else
3881  atom.size = INT64_MAX;
3882 
3883  /* check MOV header */
3884  do {
3885  if (mov->moov_retry)
3886  avio_seek(pb, 0, SEEK_SET);
3887  if ((err = mov_read_default(mov, pb, atom)) < 0) {
3888  av_log(s, AV_LOG_ERROR, "error reading header\n");
3889  mov_read_close(s);
3890  return err;
3891  }
3892  } while (pb->seekable && !mov->found_moov && !mov->moov_retry++);
3893  if (!mov->found_moov) {
3894  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
3895  mov_read_close(s);
3896  return AVERROR_INVALIDDATA;
3897  }
3898  av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
3899 
3900  if (pb->seekable) {
3901  if (mov->chapter_track > 0)
3902  mov_read_chapters(s);
3903  for (i = 0; i < s->nb_streams; i++)
3904  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
3905  mov_read_timecode_track(s, s->streams[i]);
3906  }
3907 
3908  /* copy timecode metadata from tmcd tracks to the related video streams */
3909  for (i = 0; i < s->nb_streams; i++) {
3910  AVStream *st = s->streams[i];
3911  MOVStreamContext *sc = st->priv_data;
3912  if (sc->timecode_track > 0) {
3913  AVDictionaryEntry *tcr;
3914  int tmcd_st_id = -1;
3915 
3916  for (j = 0; j < s->nb_streams; j++)
3917  if (s->streams[j]->id == sc->timecode_track)
3918  tmcd_st_id = j;
3919 
3920  if (tmcd_st_id < 0 || tmcd_st_id == i)
3921  continue;
3922  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
3923  if (tcr)
3924  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
3925  }
3926  }
3928 
3929  for (i = 0; i < s->nb_streams; i++) {
3930  AVStream *st = s->streams[i];
3931  MOVStreamContext *sc = st->priv_data;
3932  fix_timescale(mov, sc);
3934  st->skip_samples = sc->start_pad;
3935  }
3936  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
3938  sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
3939  if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3940  if (st->codec->width <= 0 || st->codec->height <= 0) {
3941  st->codec->width = sc->width;
3942  st->codec->height = sc->height;
3943  }
3944  if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
3945  if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
3946  return err;
3947  }
3948  }
3949  }
3950 
3951  if (mov->trex_data) {
3952  for (i = 0; i < s->nb_streams; i++) {
3953  AVStream *st = s->streams[i];
3954  MOVStreamContext *sc = st->priv_data;
3955  if (st->duration > 0)
3956  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
3957  }
3958  }
3959 
3960  if (mov->use_mfra_for > 0) {
3961  for (i = 0; i < s->nb_streams; i++) {
3962  AVStream *st = s->streams[i];
3963  MOVStreamContext *sc = st->priv_data;
3964  if (sc->duration_for_fps > 0) {
3965  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale /
3966  sc->duration_for_fps;
3967  }
3968  }
3969  }
3970 
3971  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
3972  if (mov->bitrates[i]) {
3973  s->streams[i]->codec->bit_rate = mov->bitrates[i];
3974  }
3975  }
3976 
3977  ff_rfps_calculate(s);
3978 
3979  for (i = 0; i < s->nb_streams; i++) {
3980  AVStream *st = s->streams[i];
3981  MOVStreamContext *sc = st->priv_data;
3982 
3983  switch (st->codec->codec_type) {
3984  case AVMEDIA_TYPE_AUDIO:
3985  err = ff_replaygain_export(st, s->metadata);
3986  if (err < 0) {
3987  mov_read_close(s);
3988  return err;
3989  }
3990  break;
3991  case AVMEDIA_TYPE_VIDEO:
3992  if (sc->display_matrix) {
3993  AVPacketSideData *sd, *tmp;
3994 
3995  tmp = av_realloc_array(st->side_data,
3996  st->nb_side_data + 1, sizeof(*tmp));
3997  if (!tmp)
3998  return AVERROR(ENOMEM);
3999 
4000  st->side_data = tmp;
4001  st->nb_side_data++;
4002 
4003  sd = &st->side_data[st->nb_side_data - 1];
4005  sd->size = sizeof(int32_t) * 9;
4006  sd->data = (uint8_t*)sc->display_matrix;
4007  sc->display_matrix = NULL;
4008  }
4009  break;
4010  }
4011  }
4012 
4013  return 0;
4014 }
4015 
4017 {
4018  AVIndexEntry *sample = NULL;
4019  int64_t best_dts = INT64_MAX;
4020  int i;
4021  for (i = 0; i < s->nb_streams; i++) {
4022  AVStream *avst = s->streams[i];
4023  MOVStreamContext *msc = avst->priv_data;
4024  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
4025  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
4026  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
4027  av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
4028  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
4029  (s->pb->seekable &&
4030  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
4031  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
4032  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
4033  sample = current_sample;
4034  best_dts = dts;
4035  *st = avst;
4036  }
4037  }
4038  }
4039  return sample;
4040 }
4041 
4043 {
4044  MOVContext *mov = s->priv_data;
4045  MOVStreamContext *sc;
4047  AVStream *st = NULL;
4048  int ret;
4049  mov->fc = s;
4050  retry:
4051  sample = mov_find_next_sample(s, &st);
4052  if (!sample) {
4053  mov->found_mdat = 0;
4054  if (!mov->next_root_atom)
4055  return AVERROR_EOF;
4056  avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
4057  mov->next_root_atom = 0;
4058  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
4059  avio_feof(s->pb))
4060  return AVERROR_EOF;
4061  av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
4062  goto retry;
4063  }
4064  sc = st->priv_data;
4065  /* must be done just before reading, to avoid infinite loop on sample */
4066  sc->current_sample++;
4067 
4068  if (mov->next_root_atom) {
4069  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
4070  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
4071  }
4072 
4073  if (st->discard != AVDISCARD_ALL) {
4074  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
4075  av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
4076  sc->ffindex, sample->pos);
4077  return AVERROR_INVALIDDATA;
4078  }
4079  ret = av_get_packet(sc->pb, pkt, sample->size);
4080  if (ret < 0)
4081  return ret;
4082  if (sc->has_palette) {
4083  uint8_t *pal;
4084 
4086  if (!pal) {
4087  av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
4088  } else {
4089  memcpy(pal, sc->palette, AVPALETTE_SIZE);
4090  sc->has_palette = 0;
4091  }
4092  }
4093 #if CONFIG_DV_DEMUXER
4094  if (mov->dv_demux && sc->dv_audio_container) {
4095  avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
4096  av_free(pkt->data);
4097  pkt->size = 0;
4098  ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
4099  if (ret < 0)
4100  return ret;
4101  }
4102 #endif
4103  }
4104 
4105  pkt->stream_index = sc->ffindex;
4106  pkt->dts = sample->timestamp;
4107  if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
4108  pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
4109  /* update ctts context */
4110  sc->ctts_sample++;
4111  if (sc->ctts_index < sc->ctts_count &&
4112  sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
4113  sc->ctts_index++;
4114  sc->ctts_sample = 0;
4115  }
4116  if (sc->wrong_dts)
4117  pkt->dts = AV_NOPTS_VALUE;
4118  } else {
4119  int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
4121  pkt->duration = next_dts - pkt->dts;
4122  pkt->pts = pkt->dts;
4123  }
4124  if (st->discard == AVDISCARD_ALL)
4125  goto retry;
4126  pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
4127  pkt->pos = sample->pos;
4128  av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
4129  pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
4130  return 0;
4131 }
4132 
4133 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
4134 {
4135  MOVStreamContext *sc = st->priv_data;
4136  int sample, time_sample;
4137  int i;
4138 
4139  sample = av_index_search_timestamp(st, timestamp, flags);
4140  av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
4141  if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
4142  sample = 0;
4143  if (sample < 0) /* not sure what to do */
4144  return AVERROR_INVALIDDATA;
4145  sc->current_sample = sample;
4146  av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
4147  /* adjust ctts index */
4148  if (sc->ctts_data) {
4149  time_sample = 0;
4150  for (i = 0; i < sc->ctts_count; i++) {
4151  int next = time_sample + sc->ctts_data[i].count;
4152  if (next > sc->current_sample) {
4153  sc->ctts_index = i;
4154  sc->ctts_sample = sc->current_sample - time_sample;
4155  break;
4156  }
4157  time_sample = next;
4158  }
4159  }
4160  return sample;
4161 }
4162 
4163 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
4164 {
4165  AVStream *st;
4166  int64_t seek_timestamp, timestamp;
4167  int sample;
4168  int i;
4169 
4170  if (stream_index >= s->nb_streams)
4171  return AVERROR_INVALIDDATA;
4172 
4173  st = s->streams[stream_index];
4174  sample = mov_seek_stream(s, st, sample_time, flags);
4175  if (sample < 0)
4176  return sample;
4177 
4178  /* adjust seek timestamp to found sample timestamp */
4179  seek_timestamp = st->index_entries[sample].timestamp;
4180 
4181  for (i = 0; i < s->nb_streams; i++) {
4182  MOVStreamContext *sc = s->streams[i]->priv_data;
4183  st = s->streams[i];
4184  st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
4185 
4186  if (stream_index == i)
4187  continue;
4188 
4189  timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
4190  mov_seek_stream(s, st, timestamp, flags);
4191  }
4192  return 0;
4193 }
4194 
4195 #define OFFSET(x) offsetof(MOVContext, x)
4196 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
4197 static const AVOption mov_options[] = {
4198  {"use_absolute_path",
4199  "allow using absolute path when opening alias, this is a possible security issue",
4200  offsetof(MOVContext, use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
4202  {"ignore_editlist", "", offsetof(MOVContext, ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
4204  {"use_mfra_for",
4205  "use mfra for fragment timestamps",
4206  offsetof(MOVContext, use_mfra_for), FF_OPT_TYPE_INT, {.i64 = FF_MOV_FLAG_MFRA_AUTO},
4208  "use_mfra_for"},
4209  {"auto", "auto", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_AUTO}, 0, 0,
4211  {"dts", "dts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_DTS}, 0, 0,
4213  {"pts", "pts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_PTS}, 0, 0,
4215  { "export_all", "Export unrecognized metadata entries", OFFSET(export_all),
4216  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = FLAGS },
4217  { NULL },
4218 };
4219 
4220 static const AVClass mov_class = {
4221  .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
4222  .item_name = av_default_item_name,
4223  .option = mov_options,
4224  .version = LIBAVUTIL_VERSION_INT,
4225 };
4226 
4228  .name = "mov,mp4,m4a,3gp,3g2,mj2",
4229  .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
4230  .priv_class = &mov_class,
4231  .priv_data_size = sizeof(MOVContext),
4232  .extensions = "mov,mp4,m4a,3gp,3g2,mj2",
4233  .read_probe = mov_probe,
4238  .flags = AVF