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mov.c
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1 /*
2  * MOV demuxer
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5  *
6  * first version by Francois Revol <revol@free.fr>
7  * seek function by Gael Chardon <gael.dev@4now.net>
8  *
9  * This file is part of FFmpeg.
10  *
11  * FFmpeg is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * FFmpeg is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with FFmpeg; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
26 #include <inttypes.h>
27 #include <limits.h>
28 #include <stdint.h>
29 
30 //#define MOV_EXPORT_ALL_METADATA
31 
32 #include "libavutil/attributes.h"
34 #include "libavutil/display.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/intfloat.h"
37 #include "libavutil/mathematics.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/dict.h"
40 #include "libavutil/opt.h"
41 #include "libavutil/timecode.h"
42 #include "libavcodec/ac3tab.h"
43 #include "avformat.h"
44 #include "internal.h"
45 #include "avio_internal.h"
46 #include "riff.h"
47 #include "isom.h"
48 #include "libavcodec/get_bits.h"
49 #include "id3v1.h"
50 #include "mov_chan.h"
51 #include "replaygain.h"
52 
53 #if CONFIG_ZLIB
54 #include <zlib.h>
55 #endif
56 
57 #include "qtpalette.h"
58 
59 
60 #undef NDEBUG
61 #include <assert.h>
62 
63 /* those functions parse an atom */
64 /* links atom IDs to parse functions */
65 typedef struct MOVParseTableEntry {
66  uint32_t type;
67  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
69 
70 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
71 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
72 
74  unsigned len, const char *key)
75 {
76  char buf[16];
77 
78  short current, total = 0;
79  avio_rb16(pb); // unknown
80  current = avio_rb16(pb);
81  if (len >= 6)
82  total = avio_rb16(pb);
83  if (!total)
84  snprintf(buf, sizeof(buf), "%d", current);
85  else
86  snprintf(buf, sizeof(buf), "%d/%d", current, total);
88  av_dict_set(&c->fc->metadata, key, buf, 0);
89 
90  return 0;
91 }
92 
94  unsigned len, const char *key)
95 {
96  /* bypass padding bytes */
97  avio_r8(pb);
98  avio_r8(pb);
99  avio_r8(pb);
100 
102  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
103 
104  return 0;
105 }
106 
108  unsigned len, const char *key)
109 {
111  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
112 
113  return 0;
114 }
115 
117  unsigned len, const char *key)
118 {
119  short genre;
120 
121  avio_r8(pb); // unknown
122 
123  genre = avio_r8(pb);
124  if (genre < 1 || genre > ID3v1_GENRE_MAX)
125  return 0;
127  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
128 
129  return 0;
130 }
131 
132 static const uint32_t mac_to_unicode[128] = {
133  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
134  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
135  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
136  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
137  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
138  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
139  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
140  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
141  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
142  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
143  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
144  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
145  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
146  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
147  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
148  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
149 };
150 
152  char *dst, int dstlen)
153 {
154  char *p = dst;
155  char *end = dst+dstlen-1;
156  int i;
157 
158  for (i = 0; i < len; i++) {
159  uint8_t t, c = avio_r8(pb);
160  if (c < 0x80 && p < end)
161  *p++ = c;
162  else if (p < end)
163  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
164  }
165  *p = 0;
166  return p - dst;
167 }
168 
169 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
170 {
171  AVPacket pkt;
172  AVStream *st;
173  MOVStreamContext *sc;
174  enum AVCodecID id;
175  int ret;
176 
177  switch (type) {
178  case 0xd: id = AV_CODEC_ID_MJPEG; break;
179  case 0xe: id = AV_CODEC_ID_PNG; break;
180  case 0x1b: id = AV_CODEC_ID_BMP; break;
181  default:
182  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
183  avio_skip(pb, len);
184  return 0;
185  }
186 
187  st = avformat_new_stream(c->fc, NULL);
188  if (!st)
189  return AVERROR(ENOMEM);
190  sc = av_mallocz(sizeof(*sc));
191  if (!sc)
192  return AVERROR(ENOMEM);
193  st->priv_data = sc;
194 
195  ret = av_get_packet(pb, &pkt, len);
196  if (ret < 0)
197  return ret;
198 
200 
201  st->attached_pic = pkt;
202  st->attached_pic.stream_index = st->index;
204 
206  st->codec->codec_id = id;
207 
208  return 0;
209 }
210 
212  unsigned len, const char *key)
213 {
214  char *value = av_malloc(len + 1);
215  if (!value)
216  return AVERROR(ENOMEM);
217  avio_read(pb, value, len);
218  value[len] = 0;
219  return av_dict_set(&c->fc->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
220 }
221 
222 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
223 {
224  char language[4] = { 0 };
225  char buf[100];
226  uint16_t langcode = 0;
227  double longitude, latitude;
228  const char *key = "location";
229 
230  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4)
231  return AVERROR_INVALIDDATA;
232 
233  avio_skip(pb, 4); // version+flags
234  langcode = avio_rb16(pb);
235  ff_mov_lang_to_iso639(langcode, language);
236  len -= 6;
237 
238  len -= avio_get_str(pb, len, buf, sizeof(buf)); // place name
239  if (len < 1)
240  return AVERROR_INVALIDDATA;
241  avio_skip(pb, 1); // role
242  len -= 1;
243 
244  if (len < 14)
245  return AVERROR_INVALIDDATA;
246  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
247  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
248 
249  // Try to output in the same format as the ?xyz field
250  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f/", latitude, longitude);
251  if (*language && strcmp(language, "und")) {
252  char key2[16];
253  snprintf(key2, sizeof(key2), "%s-%s", key, language);
254  av_dict_set(&c->fc->metadata, key2, buf, 0);
255  }
257  return av_dict_set(&c->fc->metadata, key, buf, 0);
258 }
259 
261 {
262 #ifdef MOV_EXPORT_ALL_METADATA
263  char tmp_key[5];
264 #endif
265  char key2[16], language[4] = {0};
266  char *str = NULL;
267  const char *key = NULL;
268  uint16_t langcode = 0;
269  uint32_t data_type = 0, str_size, str_size_alloc;
270  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
271 
272  switch (atom.type) {
273  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
274  case MKTAG(0xa9,'a','u','t'):
275  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
276  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
277  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
278  case MKTAG( 'c','p','i','l'): key = "compilation";
280  case MKTAG( 'c','p','r','t'):
281  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
282  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
283  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
284  case MKTAG(0xa9,'c','m','t'):
285  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
286  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
287  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
288  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
289  case MKTAG( 'g','n','r','e'): key = "genre";
290  parse = mov_metadata_gnre; break;
291  case MKTAG(0xa9,'t','o','o'):
292  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
293  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
294  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
295  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
296  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
297  case MKTAG( 'd','e','s','c'): key = "description";break;
298  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
299  case MKTAG( 't','v','s','h'): key = "show"; break;
300  case MKTAG( 't','v','e','n'): key = "episode_id";break;
301  case MKTAG( 't','v','n','n'): key = "network"; break;
302  case MKTAG( 't','r','k','n'): key = "track";
304  case MKTAG( 'd','i','s','k'): key = "disc";
306  case MKTAG( 't','v','e','s'): key = "episode_sort";
308  case MKTAG( 't','v','s','n'): key = "season_number";
310  case MKTAG( 's','t','i','k'): key = "media_type";
312  case MKTAG( 'h','d','v','d'): key = "hd_video";
314  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
316  case MKTAG( '@','P','R','M'):
317  return mov_metadata_raw(c, pb, atom.size, "premiere_version");
318  case MKTAG( '@','P','R','Q'):
319  return mov_metadata_raw(c, pb, atom.size, "quicktime_version");
320  case MKTAG( 'l','o','c','i'):
321  return mov_metadata_loci(c, pb, atom.size);
322  case MKTAG( 'X','M','P','_'):
323  return mov_metadata_raw(c, pb, atom.size, "xmp");
324  }
325 
326  if (c->itunes_metadata && atom.size > 8) {
327  int data_size = avio_rb32(pb);
328  int tag = avio_rl32(pb);
329  if (tag == MKTAG('d','a','t','a')) {
330  data_type = avio_rb32(pb); // type
331  avio_rb32(pb); // unknown
332  str_size = data_size - 16;
333  atom.size -= 16;
334 
335  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
336  int ret = mov_read_covr(c, pb, data_type, str_size);
337  if (ret < 0) {
338  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
339  }
340  return ret;
341  }
342  } else return 0;
343  } else if (atom.size > 4 && key && !c->itunes_metadata) {
344  str_size = avio_rb16(pb); // string length
345  langcode = avio_rb16(pb);
346  ff_mov_lang_to_iso639(langcode, language);
347  atom.size -= 4;
348  } else
349  str_size = atom.size;
350 
351 #ifdef MOV_EXPORT_ALL_METADATA
352  if (!key) {
353  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
354  key = tmp_key;
355  }
356 #endif
357 
358  if (!key)
359  return 0;
360  if (atom.size < 0)
361  return AVERROR_INVALIDDATA;
362 
363  str_size_alloc = str_size << 1; // worst-case requirement for output string in case of utf8 coded input
364  str = av_malloc(str_size_alloc);
365  if (!str)
366  return AVERROR(ENOMEM);
367 
368  if (parse)
369  parse(c, pb, str_size, key);
370  else {
371  if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
372  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
373  } else {
374  int ret = avio_read(pb, str, str_size);
375  if (ret != str_size) {
376  av_freep(&str);
377  return ret < 0 ? ret : AVERROR_INVALIDDATA;
378  }
379  str[str_size] = 0;
380  }
382  av_dict_set(&c->fc->metadata, key, str, 0);
383  if (*language && strcmp(language, "und")) {
384  snprintf(key2, sizeof(key2), "%s-%s", key, language);
385  av_dict_set(&c->fc->metadata, key2, str, 0);
386  }
387  }
388  av_dlog(c->fc, "lang \"%3s\" ", language);
389  av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
390  key, str, (char*)&atom.type, str_size_alloc, atom.size);
391 
392  av_freep(&str);
393 
394  return 0;
395 }
396 
398 {
399  int64_t start;
400  int i, nb_chapters, str_len, version;
401  char str[256+1];
402 
403  if ((atom.size -= 5) < 0)
404  return 0;
405 
406  version = avio_r8(pb);
407  avio_rb24(pb);
408  if (version)
409  avio_rb32(pb); // ???
410  nb_chapters = avio_r8(pb);
411 
412  for (i = 0; i < nb_chapters; i++) {
413  if (atom.size < 9)
414  return 0;
415 
416  start = avio_rb64(pb);
417  str_len = avio_r8(pb);
418 
419  if ((atom.size -= 9+str_len) < 0)
420  return 0;
421 
422  avio_read(pb, str, str_len);
423  str[str_len] = 0;
424  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
425  }
426  return 0;
427 }
428 
429 #define MIN_DATA_ENTRY_BOX_SIZE 12
431 {
432  AVStream *st;
433  MOVStreamContext *sc;
434  int entries, i, j;
435 
436  if (c->fc->nb_streams < 1)
437  return 0;
438  st = c->fc->streams[c->fc->nb_streams-1];
439  sc = st->priv_data;
440 
441  avio_rb32(pb); // version + flags
442  entries = avio_rb32(pb);
443  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
444  entries >= UINT_MAX / sizeof(*sc->drefs))
445  return AVERROR_INVALIDDATA;
446  av_free(sc->drefs);
447  sc->drefs_count = 0;
448  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
449  if (!sc->drefs)
450  return AVERROR(ENOMEM);
451  sc->drefs_count = entries;
452 
453  for (i = 0; i < sc->drefs_count; i++) {
454  MOVDref *dref = &sc->drefs[i];
455  uint32_t size = avio_rb32(pb);
456  int64_t next = avio_tell(pb) + size - 4;
457 
458  if (size < 12)
459  return AVERROR_INVALIDDATA;
460 
461  dref->type = avio_rl32(pb);
462  avio_rb32(pb); // version + flags
463  av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
464 
465  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
466  /* macintosh alias record */
467  uint16_t volume_len, len;
468  int16_t type;
469 
470  avio_skip(pb, 10);
471 
472  volume_len = avio_r8(pb);
473  volume_len = FFMIN(volume_len, 27);
474  avio_read(pb, dref->volume, 27);
475  dref->volume[volume_len] = 0;
476  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
477 
478  avio_skip(pb, 12);
479 
480  len = avio_r8(pb);
481  len = FFMIN(len, 63);
482  avio_read(pb, dref->filename, 63);
483  dref->filename[len] = 0;
484  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
485 
486  avio_skip(pb, 16);
487 
488  /* read next level up_from_alias/down_to_target */
489  dref->nlvl_from = avio_rb16(pb);
490  dref->nlvl_to = avio_rb16(pb);
491  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
492  dref->nlvl_from, dref->nlvl_to);
493 
494  avio_skip(pb, 16);
495 
496  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
497  if(avio_feof(pb))
498  return AVERROR_EOF;
499  type = avio_rb16(pb);
500  len = avio_rb16(pb);
501  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
502  if (len&1)
503  len += 1;
504  if (type == 2) { // absolute path
505  av_free(dref->path);
506  dref->path = av_mallocz(len+1);
507  if (!dref->path)
508  return AVERROR(ENOMEM);
509  avio_read(pb, dref->path, len);
510  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
511  len -= volume_len;
512  memmove(dref->path, dref->path+volume_len, len);
513  dref->path[len] = 0;
514  }
515  for (j = 0; j < len; j++)
516  if (dref->path[j] == ':')
517  dref->path[j] = '/';
518  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
519  } else if (type == 0) { // directory name
520  av_free(dref->dir);
521  dref->dir = av_malloc(len+1);
522  if (!dref->dir)
523  return AVERROR(ENOMEM);
524  if (avio_read(pb, dref->dir, len) != len)
525  return AVERROR_INVALIDDATA;
526  dref->dir[len] = 0;
527  for (j = 0; j < len; j++)
528  if (dref->dir[j] == ':')
529  dref->dir[j] = '/';
530  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
531  } else
532  avio_skip(pb, len);
533  }
534  }
535  avio_seek(pb, next, SEEK_SET);
536  }
537  return 0;
538 }
539 
541 {
542  AVStream *st;
543  uint32_t type;
544  uint32_t av_unused ctype;
545  int title_size;
546  char *title_str;
547 
548  if (c->fc->nb_streams < 1) // meta before first trak
549  return 0;
550 
551  st = c->fc->streams[c->fc->nb_streams-1];
552 
553  avio_r8(pb); /* version */
554  avio_rb24(pb); /* flags */
555 
556  /* component type */
557  ctype = avio_rl32(pb);
558  type = avio_rl32(pb); /* component subtype */
559 
560  av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
561  av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
562 
563  if (type == MKTAG('v','i','d','e'))
565  else if (type == MKTAG('s','o','u','n'))
567  else if (type == MKTAG('m','1','a',' '))
569  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
571 
572  avio_rb32(pb); /* component manufacture */
573  avio_rb32(pb); /* component flags */
574  avio_rb32(pb); /* component flags mask */
575 
576  title_size = atom.size - 24;
577  if (title_size > 0) {
578  title_str = av_malloc(title_size + 1); /* Add null terminator */
579  if (!title_str)
580  return AVERROR(ENOMEM);
581  avio_read(pb, title_str, title_size);
582  title_str[title_size] = 0;
583  if (title_str[0])
584  av_dict_set(&st->metadata, "handler_name", title_str +
585  (!c->isom && title_str[0] == title_size - 1), 0);
586  av_freep(&title_str);
587  }
588 
589  return 0;
590 }
591 
593 {
594  AVStream *st;
595  int tag;
596 
597  if (fc->nb_streams < 1)
598  return 0;
599  st = fc->streams[fc->nb_streams-1];
600 
601  avio_rb32(pb); /* version + flags */
602  ff_mp4_read_descr(fc, pb, &tag);
603  if (tag == MP4ESDescrTag) {
604  ff_mp4_parse_es_descr(pb, NULL);
605  } else
606  avio_rb16(pb); /* ID */
607 
608  ff_mp4_read_descr(fc, pb, &tag);
609  if (tag == MP4DecConfigDescrTag)
610  ff_mp4_read_dec_config_descr(fc, st, pb);
611  return 0;
612 }
613 
615 {
616  return ff_mov_read_esds(c->fc, pb);
617 }
618 
620 {
621  AVStream *st;
622  int ac3info, acmod, lfeon, bsmod;
623 
624  if (c->fc->nb_streams < 1)
625  return 0;
626  st = c->fc->streams[c->fc->nb_streams-1];
627 
628  ac3info = avio_rb24(pb);
629  bsmod = (ac3info >> 14) & 0x7;
630  acmod = (ac3info >> 11) & 0x7;
631  lfeon = (ac3info >> 10) & 0x1;
632  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
634  if (lfeon)
636  st->codec->audio_service_type = bsmod;
637  if (st->codec->channels > 1 && bsmod == 0x7)
639 
640  return 0;
641 }
642 
644 {
645  AVStream *st;
646  int eac3info, acmod, lfeon, bsmod;
647 
648  if (c->fc->nb_streams < 1)
649  return 0;
650  st = c->fc->streams[c->fc->nb_streams-1];
651 
652  /* No need to parse fields for additional independent substreams and its
653  * associated dependent substreams since libavcodec's E-AC-3 decoder
654  * does not support them yet. */
655  avio_rb16(pb); /* data_rate and num_ind_sub */
656  eac3info = avio_rb24(pb);
657  bsmod = (eac3info >> 12) & 0x1f;
658  acmod = (eac3info >> 9) & 0x7;
659  lfeon = (eac3info >> 8) & 0x1;
661  if (lfeon)
664  st->codec->audio_service_type = bsmod;
665  if (st->codec->channels > 1 && bsmod == 0x7)
667 
668  return 0;
669 }
670 
672 {
673  AVStream *st;
674 
675  if (c->fc->nb_streams < 1)
676  return 0;
677  st = c->fc->streams[c->fc->nb_streams-1];
678 
679  if (atom.size < 16)
680  return 0;
681 
682  /* skip version and flags */
683  avio_skip(pb, 4);
684 
685  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
686 
687  return 0;
688 }
689 
691 {
692  AVStream *st;
693 
694  if (c->fc->nb_streams < 1)
695  return 0;
696  st = c->fc->streams[c->fc->nb_streams-1];
697 
698  if (ff_get_wav_header(pb, st->codec, atom.size) < 0) {
699  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
700  }
701 
702  return 0;
703 }
704 
706 {
707  const int num = avio_rb32(pb);
708  const int den = avio_rb32(pb);
709  AVStream *st;
710 
711  if (c->fc->nb_streams < 1)
712  return 0;
713  st = c->fc->streams[c->fc->nb_streams-1];
714 
715  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
716  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
718  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
720  num, den);
721  } else if (den != 0) {
722  st->sample_aspect_ratio.num = num;
723  st->sample_aspect_ratio.den = den;
724  }
725  return 0;
726 }
727 
728 /* this atom contains actual media data */
730 {
731  if (atom.size == 0) /* wrong one (MP4) */
732  return 0;
733  c->found_mdat=1;
734  return 0; /* now go for moov */
735 }
736 
737 /* read major brand, minor version and compatible brands and store them as metadata */
739 {
740  uint32_t minor_ver;
741  int comp_brand_size;
742  char* comp_brands_str;
743  uint8_t type[5] = {0};
744 
745  avio_read(pb, type, 4);
746  if (strcmp(type, "qt "))
747  c->isom = 1;
748  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
749  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
750  minor_ver = avio_rb32(pb); /* minor version */
751  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
752 
753  comp_brand_size = atom.size - 8;
754  if (comp_brand_size < 0)
755  return AVERROR_INVALIDDATA;
756  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
757  if (!comp_brands_str)
758  return AVERROR(ENOMEM);
759  avio_read(pb, comp_brands_str, comp_brand_size);
760  comp_brands_str[comp_brand_size] = 0;
761  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
762  av_freep(&comp_brands_str);
763 
764  return 0;
765 }
766 
767 /* this atom should contain all header atoms */
769 {
770  int ret;
771 
772  if (c->found_moov) {
773  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
774  avio_skip(pb, atom.size);
775  return 0;
776  }
777 
778  if ((ret = mov_read_default(c, pb, atom)) < 0)
779  return ret;
780  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
781  /* so we don't parse the whole file if over a network */
782  c->found_moov=1;
783  return 0; /* now go for mdat */
784 }
785 
787 {
788  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
789  c->has_looked_for_mfra = 1;
790  if (pb->seekable) {
791  int ret;
792  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
793  "for a mfra\n");
794  if ((ret = mov_read_mfra(c, pb)) < 0) {
795  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
796  "read the mfra (may be a live ismv)\n");
797  }
798  } else {
799  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
800  "seekable, can not look for mfra\n");
801  }
802  }
804  av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
805  return mov_read_default(c, pb, atom);
806 }
807 
808 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
809 {
810  char buffer[32];
811  if (time) {
812  struct tm *ptm;
813  time_t timet;
814  if(time >= 2082844800)
815  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
816  timet = time;
817  ptm = gmtime(&timet);
818  if (!ptm) return;
819  strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
820  av_dict_set(metadata, "creation_time", buffer, 0);
821  }
822 }
823 
825 {
826  AVStream *st;
827  MOVStreamContext *sc;
828  int version;
829  char language[4] = {0};
830  unsigned lang;
831  int64_t creation_time;
832 
833  if (c->fc->nb_streams < 1)
834  return 0;
835  st = c->fc->streams[c->fc->nb_streams-1];
836  sc = st->priv_data;
837 
838  if (sc->time_scale) {
839  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
840  return AVERROR_INVALIDDATA;
841  }
842 
843  version = avio_r8(pb);
844  if (version > 1) {
845  avpriv_request_sample(c->fc, "Version %d", version);
846  return AVERROR_PATCHWELCOME;
847  }
848  avio_rb24(pb); /* flags */
849  if (version == 1) {
850  creation_time = avio_rb64(pb);
851  avio_rb64(pb);
852  } else {
853  creation_time = avio_rb32(pb);
854  avio_rb32(pb); /* modification time */
855  }
856  mov_metadata_creation_time(&st->metadata, creation_time);
857 
858  sc->time_scale = avio_rb32(pb);
859  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
860 
861  lang = avio_rb16(pb); /* language */
862  if (ff_mov_lang_to_iso639(lang, language))
863  av_dict_set(&st->metadata, "language", language, 0);
864  avio_rb16(pb); /* quality */
865 
866  return 0;
867 }
868 
870 {
871  int64_t creation_time;
872  int version = avio_r8(pb); /* version */
873  avio_rb24(pb); /* flags */
874 
875  if (version == 1) {
876  creation_time = avio_rb64(pb);
877  avio_rb64(pb);
878  } else {
879  creation_time = avio_rb32(pb);
880  avio_rb32(pb); /* modification time */
881  }
882  mov_metadata_creation_time(&c->fc->metadata, creation_time);
883  c->time_scale = avio_rb32(pb); /* time scale */
884 
885  av_dlog(c->fc, "time scale = %i\n", c->time_scale);
886 
887  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
888  // set the AVCodecContext duration because the duration of individual tracks
889  // may be inaccurate
890  if (c->time_scale > 0 && !c->trex_data)
892  avio_rb32(pb); /* preferred scale */
893 
894  avio_rb16(pb); /* preferred volume */
895 
896  avio_skip(pb, 10); /* reserved */
897 
898  avio_skip(pb, 36); /* display matrix */
899 
900  avio_rb32(pb); /* preview time */
901  avio_rb32(pb); /* preview duration */
902  avio_rb32(pb); /* poster time */
903  avio_rb32(pb); /* selection time */
904  avio_rb32(pb); /* selection duration */
905  avio_rb32(pb); /* current time */
906  avio_rb32(pb); /* next track ID */
907  return 0;
908 }
909 
911 {
912  AVStream *st;
913  int little_endian;
914 
915  if (c->fc->nb_streams < 1)
916  return 0;
917  st = c->fc->streams[c->fc->nb_streams-1];
918 
919  little_endian = avio_rb16(pb) & 0xFF;
920  av_dlog(c->fc, "enda %d\n", little_endian);
921  if (little_endian == 1) {
922  switch (st->codec->codec_id) {
925  break;
928  break;
931  break;
934  break;
935  default:
936  break;
937  }
938  }
939  return 0;
940 }
941 
943 {
944  AVStream *st;
945  char color_parameter_type[5] = { 0 };
946  int color_primaries, color_trc, color_matrix;
947 
948  if (c->fc->nb_streams < 1)
949  return 0;
950  st = c->fc->streams[c->fc->nb_streams - 1];
951 
952  avio_read(pb, color_parameter_type, 4);
953  if (strncmp(color_parameter_type, "nclx", 4) &&
954  strncmp(color_parameter_type, "nclc", 4)) {
955  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
956  color_parameter_type);
957  return 0;
958  }
959 
960  color_primaries = avio_rb16(pb);
961  color_trc = avio_rb16(pb);
962  color_matrix = avio_rb16(pb);
963 
964  av_dlog(c->fc, "%s: pri %d trc %d matrix %d",
965  color_parameter_type, color_primaries, color_trc, color_matrix);
966 
967  if (c->isom) {
968  uint8_t color_range = avio_r8(pb) >> 7;
969  av_dlog(c->fc, " full %"PRIu8"", color_range);
970  if (color_range)
972  else
974  /* 14496-12 references JPEG XR specs (rather than the more complete
975  * 23001-8) so some adjusting is required */
976  if (color_primaries >= AVCOL_PRI_FILM)
977  color_primaries = AVCOL_PRI_UNSPECIFIED;
978  if ((color_trc >= AVCOL_TRC_LINEAR &&
979  color_trc <= AVCOL_TRC_LOG_SQRT) ||
980  color_trc >= AVCOL_TRC_BT2020_10)
981  color_trc = AVCOL_TRC_UNSPECIFIED;
982  if (color_matrix >= AVCOL_SPC_BT2020_NCL)
983  color_matrix = AVCOL_SPC_UNSPECIFIED;
985  st->codec->color_trc = color_trc;
986  st->codec->colorspace = color_matrix;
987  } else {
988  /* color primaries, Table 4-4 */
989  switch (color_primaries) {
990  case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
991  case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
992  case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
993  }
994  /* color transfer, Table 4-5 */
995  switch (color_trc) {
996  case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
997  case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
998  }
999  /* color matrix, Table 4-6 */
1000  switch (color_matrix) {
1001  case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
1002  case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
1003  case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
1004  }
1005  }
1006  av_dlog(c->fc, "\n");
1007 
1008  return 0;
1009 }
1010 
1012 {
1013  AVStream *st;
1014  unsigned mov_field_order;
1015  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1016 
1017  if (c->fc->nb_streams < 1) // will happen with jp2 files
1018  return 0;
1019  st = c->fc->streams[c->fc->nb_streams-1];
1020  if (atom.size < 2)
1021  return AVERROR_INVALIDDATA;
1022  mov_field_order = avio_rb16(pb);
1023  if ((mov_field_order & 0xFF00) == 0x0100)
1024  decoded_field_order = AV_FIELD_PROGRESSIVE;
1025  else if ((mov_field_order & 0xFF00) == 0x0200) {
1026  switch (mov_field_order & 0xFF) {
1027  case 0x01: decoded_field_order = AV_FIELD_TT;
1028  break;
1029  case 0x06: decoded_field_order = AV_FIELD_BB;
1030  break;
1031  case 0x09: decoded_field_order = AV_FIELD_TB;
1032  break;
1033  case 0x0E: decoded_field_order = AV_FIELD_BT;
1034  break;
1035  }
1036  }
1037  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1038  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1039  }
1040  st->codec->field_order = decoded_field_order;
1041 
1042  return 0;
1043 }
1044 
1045 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1047  enum AVCodecID codec_id)
1048 {
1049  AVStream *st;
1050  uint64_t size;
1051  uint8_t *buf;
1052  int err;
1053 
1054  if (c->fc->nb_streams < 1) // will happen with jp2 files
1055  return 0;
1056  st= c->fc->streams[c->fc->nb_streams-1];
1057 
1058  if (st->codec->codec_id != codec_id)
1059  return 0; /* unexpected codec_id - don't mess with extradata */
1060 
1061  size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
1062  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1063  return AVERROR_INVALIDDATA;
1064  if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
1065  st->codec->extradata_size = 0;
1066  return err;
1067  }
1068  buf = st->codec->extradata + st->codec->extradata_size;
1070  AV_WB32( buf , atom.size + 8);
1071  AV_WL32( buf + 4, atom.type);
1072  err = avio_read(pb, buf + 8, atom.size);
1073  if (err < 0) {
1074  return err;
1075  } else if (err < atom.size) {
1076  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1077  st->codec->extradata_size -= atom.size - err;
1078  }
1079  memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1080  return 0;
1081 }
1082 
1083 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1085 {
1086  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1087 }
1088 
1090 {
1091  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1092 }
1093 
1095 {
1096  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1097 }
1098 
1100 {
1101  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1102  if(ret == 0)
1103  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1104  return ret;
1105 }
1106 
1108 {
1109  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1110 
1111  if (!ret && c->fc->nb_streams >= 1) {
1112  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1113  if (avctx->extradata_size >= 40) {
1114  avctx->height = AV_RB16(&avctx->extradata[36]);
1115  avctx->width = AV_RB16(&avctx->extradata[38]);
1116  }
1117  }
1118  return ret;
1119 }
1120 
1122 {
1123  if (c->fc->nb_streams >= 1) {
1124  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1125  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1126  codec->codec_id == AV_CODEC_ID_H264 &&
1127  atom.size > 11) {
1128  avio_skip(pb, 10);
1129  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1130  if (avio_rb16(pb) == 0xd4d)
1131  codec->width = 1440;
1132  return 0;
1133  }
1134  }
1135 
1136  return mov_read_avid(c, pb, atom);
1137 }
1138 
1140 {
1141  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1142 }
1143 
1145 {
1146  AVStream *st;
1147 
1148  if (c->fc->nb_streams < 1)
1149  return 0;
1150  st = c->fc->streams[c->fc->nb_streams-1];
1151 
1152  if ((uint64_t)atom.size > (1<<30))
1153  return AVERROR_INVALIDDATA;
1154 
1155  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1156  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1157  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1158  // pass all frma atom to codec, needed at least for QDMC and QDM2
1159  av_free(st->codec->extradata);
1160  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1161  return AVERROR(ENOMEM);
1162  } else if (atom.size > 8) { /* to read frma, esds atoms */
1163  int ret;
1164  if ((ret = mov_read_default(c, pb, atom)) < 0)
1165  return ret;
1166  } else
1167  avio_skip(pb, atom.size);
1168  return 0;
1169 }
1170 
1171 /**
1172  * This function reads atom content and puts data in extradata without tag
1173  * nor size unlike mov_read_extradata.
1174  */
1176 {
1177  AVStream *st;
1178 
1179  if (c->fc->nb_streams < 1)
1180  return 0;
1181  st = c->fc->streams[c->fc->nb_streams-1];
1182 
1183  if ((uint64_t)atom.size > (1<<30))
1184  return AVERROR_INVALIDDATA;
1185 
1186  if (atom.size >= 10) {
1187  // Broken files created by legacy versions of libavformat will
1188  // wrap a whole fiel atom inside of a glbl atom.
1189  unsigned size = avio_rb32(pb);
1190  unsigned type = avio_rl32(pb);
1191  avio_seek(pb, -8, SEEK_CUR);
1192  if (type == MKTAG('f','i','e','l') && size == atom.size)
1193  return mov_read_default(c, pb, atom);
1194  }
1195  if (st->codec->extradata_size > 1 && st->codec->extradata) {
1196  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1197  return 0;
1198  }
1199  av_free(st->codec->extradata);
1200  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1201  return AVERROR(ENOMEM);
1202 
1203  return 0;
1204 }
1205 
1207 {
1208  AVStream *st;
1209  uint8_t profile_level;
1210  int ret;
1211 
1212  if (c->fc->nb_streams < 1)
1213  return 0;
1214  st = c->fc->streams[c->fc->nb_streams-1];
1215 
1216  if (atom.size >= (1<<28) || atom.size < 7)
1217  return AVERROR_INVALIDDATA;
1218 
1219  profile_level = avio_r8(pb);
1220  if ((profile_level & 0xf0) != 0xc0)
1221  return 0;
1222 
1223  avio_seek(pb, 6, SEEK_CUR);
1224  av_free(st->codec->extradata);
1225  if ((ret = ff_get_extradata(st->codec, pb, atom.size - 7)) < 0)
1226  return ret;
1227 
1228  return 0;
1229 }
1230 
1231 /**
1232  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1233  * but can have extradata appended at the end after the 40 bytes belonging
1234  * to the struct.
1235  */
1237 {
1238  AVStream *st;
1239 
1240  if (c->fc->nb_streams < 1)
1241  return 0;
1242  if (atom.size <= 40)
1243  return 0;
1244  st = c->fc->streams[c->fc->nb_streams-1];
1245 
1246  if ((uint64_t)atom.size > (1<<30))
1247  return AVERROR_INVALIDDATA;
1248 
1249  avio_skip(pb, 40);
1250  av_free(st->codec->extradata);
1251  if (ff_get_extradata(st->codec, pb, atom.size - 40) < 0)
1252  return AVERROR(ENOMEM);
1253  return 0;
1254 }
1255 
1257 {
1258  AVStream *st;
1259  MOVStreamContext *sc;
1260  unsigned int i, entries;
1261 
1262  if (c->fc->nb_streams < 1)
1263  return 0;
1264  st = c->fc->streams[c->fc->nb_streams-1];
1265  sc = st->priv_data;
1266 
1267  avio_r8(pb); /* version */
1268  avio_rb24(pb); /* flags */
1269 
1270  entries = avio_rb32(pb);
1271 
1272  if (!entries)
1273  return 0;
1274  if (entries >= UINT_MAX/sizeof(int64_t))
1275  return AVERROR_INVALIDDATA;
1276 
1277  sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1278  if (!sc->chunk_offsets)
1279  return AVERROR(ENOMEM);
1280  sc->chunk_count = entries;
1281 
1282  if (atom.type == MKTAG('s','t','c','o'))
1283  for (i = 0; i < entries && !pb->eof_reached; i++)
1284  sc->chunk_offsets[i] = avio_rb32(pb);
1285  else if (atom.type == MKTAG('c','o','6','4'))
1286  for (i = 0; i < entries && !pb->eof_reached; i++)
1287  sc->chunk_offsets[i] = avio_rb64(pb);
1288  else
1289  return AVERROR_INVALIDDATA;
1290 
1291  sc->chunk_count = i;
1292 
1293  if (pb->eof_reached)
1294  return AVERROR_EOF;
1295 
1296  return 0;
1297 }
1298 
1299 /**
1300  * Compute codec id for 'lpcm' tag.
1301  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1302  */
1304 {
1305  /* lpcm flags:
1306  * 0x1 = float
1307  * 0x2 = big-endian
1308  * 0x4 = signed
1309  */
1310  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1311 }
1312 
1313 static int mov_codec_id(AVStream *st, uint32_t format)
1314 {
1315  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1316 
1317  if (id <= 0 &&
1318  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1319  (format & 0xFFFF) == 'T' + ('S' << 8)))
1320  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1321 
1322  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1324  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1325  /* skip old asf mpeg4 tag */
1326  format && format != MKTAG('m','p','4','s')) {
1328  if (id <= 0)
1329  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1330  if (id > 0)
1332  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1334  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1336  if (id > 0)
1338  }
1339  }
1340 
1341  st->codec->codec_tag = format;
1342 
1343  return id;
1344 }
1345 
1347  AVStream *st, MOVStreamContext *sc)
1348 {
1349  uint8_t codec_name[32];
1350  unsigned int color_depth, len, j;
1351  int color_greyscale;
1352  int color_table_id;
1353 
1354  avio_rb16(pb); /* version */
1355  avio_rb16(pb); /* revision level */
1356  avio_rb32(pb); /* vendor */
1357  avio_rb32(pb); /* temporal quality */
1358  avio_rb32(pb); /* spatial quality */
1359 
1360  st->codec->width = avio_rb16(pb); /* width */
1361  st->codec->height = avio_rb16(pb); /* height */
1362 
1363  avio_rb32(pb); /* horiz resolution */
1364  avio_rb32(pb); /* vert resolution */
1365  avio_rb32(pb); /* data size, always 0 */
1366  avio_rb16(pb); /* frames per samples */
1367 
1368  len = avio_r8(pb); /* codec name, pascal string */
1369  if (len > 31)
1370  len = 31;
1371  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1372  if (len < 31)
1373  avio_skip(pb, 31 - len);
1374 
1375  if (codec_name[0])
1376  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1377 
1378  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1379  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1380  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1381  st->codec->width &= ~1;
1382  st->codec->height &= ~1;
1383  }
1384  /* Flash Media Server uses tag H263 with Sorenson Spark */
1385  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1386  !memcmp(codec_name, "Sorenson H263", 13))
1388 
1389  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1390  color_table_id = avio_rb16(pb); /* colortable id */
1391  av_dlog(c->fc, "depth %d, ctab id %d\n",
1392  st->codec->bits_per_coded_sample, color_table_id);
1393  /* figure out the palette situation */
1394  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1395  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1396  /* Do not create a greyscale palette for cinepak */
1397  if (color_greyscale && st->codec->codec_id == AV_CODEC_ID_CINEPAK)
1398  return;
1399 
1400  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1401  if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1402  /* for palette traversal */
1403  unsigned int color_start, color_count, color_end;
1404  unsigned char a, r, g, b;
1405 
1406  if (color_greyscale) {
1407  int color_index, color_dec;
1408  /* compute the greyscale palette */
1409  st->codec->bits_per_coded_sample = color_depth;
1410  color_count = 1 << color_depth;
1411  color_index = 255;
1412  color_dec = 256 / (color_count - 1);
1413  for (j = 0; j < color_count; j++) {
1414  r = g = b = color_index;
1415  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1416  color_index -= color_dec;
1417  if (color_index < 0)
1418  color_index = 0;
1419  }
1420  } else if (color_table_id) {
1421  const uint8_t *color_table;
1422  /* if flag bit 3 is set, use the default palette */
1423  color_count = 1 << color_depth;
1424  if (color_depth == 2)
1425  color_table = ff_qt_default_palette_4;
1426  else if (color_depth == 4)
1427  color_table = ff_qt_default_palette_16;
1428  else
1429  color_table = ff_qt_default_palette_256;
1430 
1431  for (j = 0; j < color_count; j++) {
1432  r = color_table[j * 3 + 0];
1433  g = color_table[j * 3 + 1];
1434  b = color_table[j * 3 + 2];
1435  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1436  }
1437  } else {
1438  /* load the palette from the file */
1439  color_start = avio_rb32(pb);
1440  color_count = avio_rb16(pb);
1441  color_end = avio_rb16(pb);
1442  if ((color_start <= 255) && (color_end <= 255)) {
1443  for (j = color_start; j <= color_end; j++) {
1444  /* each A, R, G, or B component is 16 bits;
1445  * only use the top 8 bits */
1446  a = avio_r8(pb);
1447  avio_r8(pb);
1448  r = avio_r8(pb);
1449  avio_r8(pb);
1450  g = avio_r8(pb);
1451  avio_r8(pb);
1452  b = avio_r8(pb);
1453  avio_r8(pb);
1454  sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1455  }
1456  }
1457  }
1458  sc->has_palette = 1;
1459  }
1460 }
1461 
1463  AVStream *st, MOVStreamContext *sc)
1464 {
1465  int bits_per_sample, flags;
1466  uint16_t version = avio_rb16(pb);
1467  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1468 
1469  avio_rb16(pb); /* revision level */
1470  avio_rb32(pb); /* vendor */
1471 
1472  st->codec->channels = avio_rb16(pb); /* channel count */
1473  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1474  av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1475 
1476  sc->audio_cid = avio_rb16(pb);
1477  avio_rb16(pb); /* packet size = 0 */
1478 
1479  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1480 
1481  // Read QT version 1 fields. In version 0 these do not exist.
1482  av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
1483  if (!c->isom ||
1484  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1485 
1486  if (version == 1) {
1487  sc->samples_per_frame = avio_rb32(pb);
1488  avio_rb32(pb); /* bytes per packet */
1489  sc->bytes_per_frame = avio_rb32(pb);
1490  avio_rb32(pb); /* bytes per sample */
1491  } else if (version == 2) {
1492  avio_rb32(pb); /* sizeof struct only */
1494  st->codec->channels = avio_rb32(pb);
1495  avio_rb32(pb); /* always 0x7F000000 */
1497 
1498  flags = avio_rb32(pb); /* lpcm format specific flag */
1499  sc->bytes_per_frame = avio_rb32(pb);
1500  sc->samples_per_frame = avio_rb32(pb);
1501  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1502  st->codec->codec_id =
1504  flags);
1505  }
1506  }
1507 
1508  switch (st->codec->codec_id) {
1509  case AV_CODEC_ID_PCM_S8:
1510  case AV_CODEC_ID_PCM_U8:
1511  if (st->codec->bits_per_coded_sample == 16)
1513  break;
1514  case AV_CODEC_ID_PCM_S16LE:
1515  case AV_CODEC_ID_PCM_S16BE:
1516  if (st->codec->bits_per_coded_sample == 8)
1518  else if (st->codec->bits_per_coded_sample == 24)
1519  st->codec->codec_id =
1522  else if (st->codec->bits_per_coded_sample == 32)
1523  st->codec->codec_id =
1526  break;
1527  /* set values for old format before stsd version 1 appeared */
1528  case AV_CODEC_ID_MACE3:
1529  sc->samples_per_frame = 6;
1530  sc->bytes_per_frame = 2 * st->codec->channels;
1531  break;
1532  case AV_CODEC_ID_MACE6:
1533  sc->samples_per_frame = 6;
1534  sc->bytes_per_frame = 1 * st->codec->channels;
1535  break;
1537  sc->samples_per_frame = 64;
1538  sc->bytes_per_frame = 34 * st->codec->channels;
1539  break;
1540  case AV_CODEC_ID_GSM:
1541  sc->samples_per_frame = 160;
1542  sc->bytes_per_frame = 33;
1543  break;
1544  default:
1545  break;
1546  }
1547 
1548  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1549  if (bits_per_sample) {
1550  st->codec->bits_per_coded_sample = bits_per_sample;
1551  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1552  }
1553 }
1554 
1556  AVStream *st, MOVStreamContext *sc,
1557  int size)
1558 {
1559  // ttxt stsd contains display flags, justification, background
1560  // color, fonts, and default styles, so fake an atom to read it
1561  MOVAtom fake_atom = { .size = size };
1562  // mp4s contains a regular esds atom
1563  if (st->codec->codec_tag != AV_RL32("mp4s"))
1564  mov_read_glbl(c, pb, fake_atom);
1565  st->codec->width = sc->width;
1566  st->codec->height = sc->height;
1567 }
1568 
1569 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1570 {
1571  uint8_t r, g, b;
1572  int y, cb, cr;
1573 
1574  y = (ycbcr >> 16) & 0xFF;
1575  cr = (ycbcr >> 8) & 0xFF;
1576  cb = ycbcr & 0xFF;
1577 
1578  b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
1579  g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
1580  r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
1581 
1582  return (r << 16) | (g << 8) | b;
1583 }
1584 
1586 {
1587  char buf[256] = {0};
1588  uint8_t *src = st->codec->extradata;
1589  int i;
1590 
1591  if (st->codec->extradata_size != 64)
1592  return 0;
1593 
1594  if (st->codec->width > 0 && st->codec->height > 0)
1595  snprintf(buf, sizeof(buf), "size: %dx%d\n",
1596  st->codec->width, st->codec->height);
1597  av_strlcat(buf, "palette: ", sizeof(buf));
1598 
1599  for (i = 0; i < 16; i++) {
1600  uint32_t yuv = AV_RB32(src + i * 4);
1601  uint32_t rgba = yuv_to_rgba(yuv);
1602 
1603  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1604  }
1605 
1606  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1607  return 0;
1608 
1609  av_freep(&st->codec->extradata);
1610  st->codec->extradata_size = 0;
1612  if (!st->codec->extradata)
1613  return AVERROR(ENOMEM);
1614  st->codec->extradata_size = strlen(buf);
1615  memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1616 
1617  return 0;
1618 }
1619 
1621  AVStream *st, MOVStreamContext *sc,
1622  int size)
1623 {
1624  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1625  if (ff_get_extradata(st->codec, pb, size) < 0)
1626  return AVERROR(ENOMEM);
1627  if (size > 16) {
1628  MOVStreamContext *tmcd_ctx = st->priv_data;
1629  int val;
1630  val = AV_RB32(st->codec->extradata + 4);
1631  tmcd_ctx->tmcd_flags = val;
1632  if (val & 1)
1634  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1635  st->codec->time_base.num = 1;
1636  if (size > 30) {
1637  uint32_t len = AV_RB32(st->codec->extradata + 18); /* name atom length */
1638  uint32_t format = AV_RB32(st->codec->extradata + 22);
1639  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
1640  uint16_t str_size = AV_RB16(st->codec->extradata + 26); /* string length */
1641  if (str_size > 0 && size >= (int)str_size + 26) {
1642  char *reel_name = av_malloc(str_size + 1);
1643  if (!reel_name)
1644  return AVERROR(ENOMEM);
1645  memcpy(reel_name, st->codec->extradata + 30, str_size);
1646  reel_name[str_size] = 0; /* Add null terminator */
1647  /* don't add reel_name if emtpy string */
1648  if (*reel_name == 0) {
1649  av_free(reel_name);
1650  } else {
1651  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
1652  }
1653  }
1654  }
1655  }
1656  }
1657  } else {
1658  /* other codec type, just skip (rtp, mp4s ...) */
1659  avio_skip(pb, size);
1660  }
1661  return 0;
1662 }
1663 
1665  AVStream *st, MOVStreamContext *sc)
1666 {
1667  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1668  !st->codec->sample_rate && sc->time_scale > 1)
1669  st->codec->sample_rate = sc->time_scale;
1670 
1671  /* special codec parameters handling */
1672  switch (st->codec->codec_id) {
1673 #if CONFIG_DV_DEMUXER
1674  case AV_CODEC_ID_DVAUDIO:
1677  if (!c->dv_demux) {
1678  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1679  return AVERROR(ENOMEM);
1680  }
1681  sc->dv_audio_container = 1;
1683  break;
1684 #endif
1685  /* no ifdef since parameters are always those */
1686  case AV_CODEC_ID_QCELP:
1687  st->codec->channels = 1;
1688  // force sample rate for qcelp when not stored in mov
1689  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1690  st->codec->sample_rate = 8000;
1691  // FIXME: Why is the following needed for some files?
1692  sc->samples_per_frame = 160;
1693  if (!sc->bytes_per_frame)
1694  sc->bytes_per_frame = 35;
1695  break;
1696  case AV_CODEC_ID_AMR_NB:
1697  st->codec->channels = 1;
1698  /* force sample rate for amr, stsd in 3gp does not store sample rate */
1699  st->codec->sample_rate = 8000;
1700  break;
1701  case AV_CODEC_ID_AMR_WB:
1702  st->codec->channels = 1;
1703  st->codec->sample_rate = 16000;
1704  break;
1705  case AV_CODEC_ID_MP2:
1706  case AV_CODEC_ID_MP3:
1707  /* force type after stsd for m1a hdlr */
1710  break;
1711  case AV_CODEC_ID_GSM:
1712  case AV_CODEC_ID_ADPCM_MS:
1714  case AV_CODEC_ID_ILBC:
1715  case AV_CODEC_ID_MACE3:
1716  case AV_CODEC_ID_MACE6:
1717  case AV_CODEC_ID_QDM2:
1718  st->codec->block_align = sc->bytes_per_frame;
1719  break;
1720  case AV_CODEC_ID_ALAC:
1721  if (st->codec->extradata_size == 36) {
1722  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1723  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1724  }
1725  break;
1726  case AV_CODEC_ID_AC3:
1727  case AV_CODEC_ID_EAC3:
1729  case AV_CODEC_ID_VC1:
1731  break;
1732  default:
1733  break;
1734  }
1735  return 0;
1736 }
1737 
1739  int codec_tag, int format,
1740  int64_t size)
1741 {
1742  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1743 
1744  if (codec_tag &&
1745  (codec_tag != format &&
1746  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1747  : codec_tag != MKTAG('j','p','e','g')))) {
1748  /* Multiple fourcc, we skip JPEG. This is not correct, we should
1749  * export it as a separate AVStream but this needs a few changes
1750  * in the MOV demuxer, patch welcome. */
1751 
1752  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1753  avio_skip(pb, size);
1754  return 1;
1755  }
1756  if ( codec_tag == AV_RL32("avc1") ||
1757  codec_tag == AV_RL32("hvc1") ||
1758  codec_tag == AV_RL32("hev1")
1759  )
1760  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
1761 
1762  return 0;
1763 }
1764 
1766 {
1767  AVStream *st;
1768  MOVStreamContext *sc;
1769  int pseudo_stream_id;
1770 
1771  if (c->fc->nb_streams < 1)
1772  return 0;
1773  st = c->fc->streams[c->fc->nb_streams-1];
1774  sc = st->priv_data;
1775 
1776  for (pseudo_stream_id = 0;
1777  pseudo_stream_id < entries && !pb->eof_reached;
1778  pseudo_stream_id++) {
1779  //Parsing Sample description table
1780  enum AVCodecID id;
1781  int ret, dref_id = 1;
1782  MOVAtom a = { AV_RL32("stsd") };
1783  int64_t start_pos = avio_tell(pb);
1784  int64_t size = avio_rb32(pb); /* size */
1785  uint32_t format = avio_rl32(pb); /* data format */
1786 
1787  if (size >= 16) {
1788  avio_rb32(pb); /* reserved */
1789  avio_rb16(pb); /* reserved */
1790  dref_id = avio_rb16(pb);
1791  }else if (size <= 7){
1792  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1793  return AVERROR_INVALIDDATA;
1794  }
1795 
1796  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1797  size - (avio_tell(pb) - start_pos)))
1798  continue;
1799 
1800  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1801  sc->dref_id= dref_id;
1802 
1803  id = mov_codec_id(st, format);
1804 
1805  av_dlog(c->fc, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1806  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1807  (format >> 24) & 0xff, st->codec->codec_type);
1808 
1809  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1810  st->codec->codec_id = id;
1811  mov_parse_stsd_video(c, pb, st, sc);
1812  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1813  st->codec->codec_id = id;
1814  mov_parse_stsd_audio(c, pb, st, sc);
1815  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1816  st->codec->codec_id = id;
1817  mov_parse_stsd_subtitle(c, pb, st, sc,
1818  size - (avio_tell(pb) - start_pos));
1819  } else {
1820  ret = mov_parse_stsd_data(c, pb, st, sc,
1821  size - (avio_tell(pb) - start_pos));
1822  if (ret < 0)
1823  return ret;
1824  }
1825  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1826  a.size = size - (avio_tell(pb) - start_pos);
1827  if (a.size > 8) {
1828  if ((ret = mov_read_default(c, pb, a)) < 0)
1829  return ret;
1830  } else if (a.size > 0)
1831  avio_skip(pb, a.size);
1832  }
1833 
1834  if (pb->eof_reached)
1835  return AVERROR_EOF;
1836 
1837  return mov_finalize_stsd_codec(c, pb, st, sc);
1838 }
1839 
1841 {
1842  int entries;
1843 
1844  avio_r8(pb); /* version */
1845  avio_rb24(pb); /* flags */
1846  entries = avio_rb32(pb);
1847 
1848  return ff_mov_read_stsd_entries(c, pb, entries);
1849 }
1850 
1852 {
1853  AVStream *st;
1854  MOVStreamContext *sc;
1855  unsigned int i, entries;
1856 
1857  if (c->fc->nb_streams < 1)
1858  return 0;
1859  st = c->fc->streams[c->fc->nb_streams-1];
1860  sc = st->priv_data;
1861 
1862  avio_r8(pb); /* version */
1863  avio_rb24(pb); /* flags */
1864 
1865  entries = avio_rb32(pb);
1866 
1867  av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1868 
1869  if (!entries)
1870  return 0;
1871  if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1872  return AVERROR_INVALIDDATA;
1873  sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1874  if (!sc->stsc_data)
1875  return AVERROR(ENOMEM);
1876 
1877  for (i = 0; i < entries && !pb->eof_reached; i++) {
1878  sc->stsc_data[i].first = avio_rb32(pb);
1879  sc->stsc_data[i].count = avio_rb32(pb);
1880  sc->stsc_data[i].id = avio_rb32(pb);
1881  }
1882 
1883  sc->stsc_count = i;
1884 
1885  if (pb->eof_reached)
1886  return AVERROR_EOF;
1887 
1888  return 0;
1889 }
1890 
1892 {
1893  AVStream *st;
1894  MOVStreamContext *sc;
1895  unsigned i, entries;
1896 
1897  if (c->fc->nb_streams < 1)
1898  return 0;
1899  st = c->fc->streams[c->fc->nb_streams-1];
1900  sc = st->priv_data;
1901 
1902  avio_rb32(pb); // version + flags
1903 
1904  entries = avio_rb32(pb);
1905  if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1906  return AVERROR_INVALIDDATA;
1907  sc->stps_data = av_malloc(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 (entries >= UINT_MAX / sizeof(int))
1950  return AVERROR_INVALIDDATA;
1951  sc->keyframes = av_malloc(entries * sizeof(int));
1952  if (!sc->keyframes)
1953  return AVERROR(ENOMEM);
1954 
1955  for (i = 0; i < entries && !pb->eof_reached; i++) {
1956  sc->keyframes[i] = avio_rb32(pb);
1957  //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1958  }
1959 
1960  sc->keyframe_count = i;
1961 
1962  if (pb->eof_reached)
1963  return AVERROR_EOF;
1964 
1965  return 0;
1966 }
1967 
1969 {
1970  AVStream *st;
1971  MOVStreamContext *sc;
1972  unsigned int i, entries, sample_size, field_size, num_bytes;
1973  GetBitContext gb;
1974  unsigned char* buf;
1975 
1976  if (c->fc->nb_streams < 1)
1977  return 0;
1978  st = c->fc->streams[c->fc->nb_streams-1];
1979  sc = st->priv_data;
1980 
1981  avio_r8(pb); /* version */
1982  avio_rb24(pb); /* flags */
1983 
1984  if (atom.type == MKTAG('s','t','s','z')) {
1985  sample_size = avio_rb32(pb);
1986  if (!sc->sample_size) /* do not overwrite value computed in stsd */
1987  sc->sample_size = sample_size;
1988  sc->stsz_sample_size = sample_size;
1989  field_size = 32;
1990  } else {
1991  sample_size = 0;
1992  avio_rb24(pb); /* reserved */
1993  field_size = avio_r8(pb);
1994  }
1995  entries = avio_rb32(pb);
1996 
1997  av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1998 
1999  sc->sample_count = entries;
2000  if (sample_size)
2001  return 0;
2002 
2003  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2004  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2005  return AVERROR_INVALIDDATA;
2006  }
2007 
2008  if (!entries)
2009  return 0;
2010  if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
2011  return AVERROR_INVALIDDATA;
2012  sc->sample_sizes = av_malloc(entries * sizeof(int));
2013  if (!sc->sample_sizes)
2014  return AVERROR(ENOMEM);
2015 
2016  num_bytes = (entries*field_size+4)>>3;
2017 
2018  buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
2019  if (!buf) {
2020  av_freep(&sc->sample_sizes);
2021  return AVERROR(ENOMEM);
2022  }
2023 
2024  if (avio_read(pb, buf, num_bytes) < num_bytes) {
2025  av_freep(&sc->sample_sizes);
2026  av_free(buf);
2027  return AVERROR_INVALIDDATA;
2028  }
2029 
2030  init_get_bits(&gb, buf, 8*num_bytes);
2031 
2032  for (i = 0; i < entries && !pb->eof_reached; i++) {
2033  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2034  sc->data_size += sc->sample_sizes[i];
2035  }
2036 
2037  sc->sample_count = i;
2038 
2039  if (pb->eof_reached)
2040  return AVERROR_EOF;
2041 
2042  av_free(buf);
2043  return 0;
2044 }
2045 
2047 {
2048  AVStream *st;
2049  MOVStreamContext *sc;
2050  unsigned int i, entries;
2051  int64_t duration=0;
2052  int64_t total_sample_count=0;
2053 
2054  if (c->fc->nb_streams < 1)
2055  return 0;
2056  st = c->fc->streams[c->fc->nb_streams-1];
2057  sc = st->priv_data;
2058 
2059  avio_r8(pb); /* version */
2060  avio_rb24(pb); /* flags */
2061  entries = avio_rb32(pb);
2062 
2063  av_dlog(c->fc, "track[%i].stts.entries = %i\n",
2064  c->fc->nb_streams-1, entries);
2065 
2066  if (entries >= UINT_MAX / sizeof(*sc->stts_data))
2067  return -1;
2068 
2069  av_free(sc->stts_data);
2070  sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
2071  if (!sc->stts_data)
2072  return AVERROR(ENOMEM);
2073 
2074  for (i = 0; i < entries && !pb->eof_reached; i++) {
2075  int sample_duration;
2076  int sample_count;
2077 
2078  sample_count=avio_rb32(pb);
2079  sample_duration = avio_rb32(pb);
2080 
2081  /* sample_duration < 0 is invalid based on the spec */
2082  if (sample_duration < 0) {
2083  av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta %d in STTS, at %d st:%d\n",
2084  sample_duration, i, c->fc->nb_streams-1);
2085  sample_duration = 1;
2086  }
2087  if (sample_count < 0) {
2088  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2089  return AVERROR_INVALIDDATA;
2090  }
2091  sc->stts_data[i].count= sample_count;
2092  sc->stts_data[i].duration= sample_duration;
2093 
2094  av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
2095  sample_count, sample_duration);
2096 
2097  if ( i+1 == entries
2098  && i
2099  && sample_count == 1
2100  && total_sample_count > 100
2101  && sample_duration/10 > duration / total_sample_count)
2102  sample_duration = duration / total_sample_count;
2103  duration+=(int64_t)sample_duration*sample_count;
2104  total_sample_count+=sample_count;
2105  }
2106 
2107  sc->stts_count = i;
2108 
2109  sc->duration_for_fps += duration;
2110  sc->nb_frames_for_fps += total_sample_count;
2111 
2112  if (pb->eof_reached)
2113  return AVERROR_EOF;
2114 
2115  st->nb_frames= total_sample_count;
2116  if (duration)
2117  st->duration= duration;
2118  sc->track_end = duration;
2119  return 0;
2120 }
2121 
2123 {
2124  if (duration < 0) {
2125  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2126  }
2127 }
2128 
2130 {
2131  AVStream *st;
2132  MOVStreamContext *sc;
2133  unsigned int i, entries;
2134 
2135  if (c->fc->nb_streams < 1)
2136  return 0;
2137  st = c->fc->streams[c->fc->nb_streams-1];
2138  sc = st->priv_data;
2139 
2140  avio_r8(pb); /* version */
2141  avio_rb24(pb); /* flags */
2142  entries = avio_rb32(pb);
2143 
2144  av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2145 
2146  if (!entries)
2147  return 0;
2148  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2149  return AVERROR_INVALIDDATA;
2150  sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
2151  if (!sc->ctts_data)
2152  return AVERROR(ENOMEM);
2153 
2154  for (i = 0; i < entries && !pb->eof_reached; i++) {
2155  int count =avio_rb32(pb);
2156  int duration =avio_rb32(pb);
2157 
2158  sc->ctts_data[i].count = count;
2159  sc->ctts_data[i].duration= duration;
2160 
2161  av_dlog(c->fc, "count=%d, duration=%d\n",
2162  count, duration);
2163 
2164  if (FFABS(duration) > (1<<28) && i+2<entries) {
2165  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2166  av_freep(&sc->ctts_data);
2167  sc->ctts_count = 0;
2168  return 0;
2169  }
2170 
2171  if (i+2<entries)
2172  mov_update_dts_shift(sc, duration);
2173  }
2174 
2175  sc->ctts_count = i;
2176 
2177  if (pb->eof_reached)
2178  return AVERROR_EOF;
2179 
2180  av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
2181 
2182  return 0;
2183 }
2184 
2186 {
2187  AVStream *st;
2188  MOVStreamContext *sc;
2189  unsigned int i, entries;
2190  uint8_t version;
2191  uint32_t grouping_type;
2192 
2193  if (c->fc->nb_streams < 1)
2194  return 0;
2195  st = c->fc->streams[c->fc->nb_streams-1];
2196  sc = st->priv_data;
2197 
2198  version = avio_r8(pb); /* version */
2199  avio_rb24(pb); /* flags */
2200  grouping_type = avio_rl32(pb);
2201  if (grouping_type != MKTAG( 'r','a','p',' '))
2202  return 0; /* only support 'rap ' grouping */
2203  if (version == 1)
2204  avio_rb32(pb); /* grouping_type_parameter */
2205 
2206  entries = avio_rb32(pb);
2207  if (!entries)
2208  return 0;
2209  if (entries >= UINT_MAX / sizeof(*sc->rap_group))
2210  return AVERROR_INVALIDDATA;
2211  sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
2212  if (!sc->rap_group)
2213  return AVERROR(ENOMEM);
2214 
2215  for (i = 0; i < entries && !pb->eof_reached; i++) {
2216  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2217  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2218  }
2219 
2220  sc->rap_group_count = i;
2221 
2222  return pb->eof_reached ? AVERROR_EOF : 0;
2223 }
2224 
2225 static void mov_build_index(MOVContext *mov, AVStream *st)
2226 {
2227  MOVStreamContext *sc = st->priv_data;
2228  int64_t current_offset;
2229  int64_t current_dts = 0;
2230  unsigned int stts_index = 0;
2231  unsigned int stsc_index = 0;
2232  unsigned int stss_index = 0;
2233  unsigned int stps_index = 0;
2234  unsigned int i, j;
2235  uint64_t stream_size = 0;
2236 
2237  /* adjust first dts according to edit list */
2238  if ((sc->empty_duration || sc->start_time) && mov->time_scale > 0) {
2239  if (sc->empty_duration)
2241  sc->time_offset = sc->start_time - sc->empty_duration;
2242  current_dts = -sc->time_offset;
2243  if (sc->ctts_count>0 && sc->stts_count>0 &&
2244  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2245  /* more than 16 frames delay, dts are likely wrong
2246  this happens with files created by iMovie */
2247  sc->wrong_dts = 1;
2248  st->codec->has_b_frames = 1;
2249  }
2250  }
2251 
2252  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2253  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2254  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2255  unsigned int current_sample = 0;
2256  unsigned int stts_sample = 0;
2257  unsigned int sample_size;
2258  unsigned int distance = 0;
2259  unsigned int rap_group_index = 0;
2260  unsigned int rap_group_sample = 0;
2261  int rap_group_present = sc->rap_group_count && sc->rap_group;
2262  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2263 
2264  current_dts -= sc->dts_shift;
2265 
2266  if (!sc->sample_count || st->nb_index_entries)
2267  return;
2268  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2269  return;
2271  st->nb_index_entries + sc->sample_count,
2272  sizeof(*st->index_entries)) < 0) {
2273  st->nb_index_entries = 0;
2274  return;
2275  }
2277 
2278  for (i = 0; i < sc->chunk_count; i++) {
2279  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2280  current_offset = sc->chunk_offsets[i];
2281  while (stsc_index + 1 < sc->stsc_count &&
2282  i + 1 == sc->stsc_data[stsc_index + 1].first)
2283  stsc_index++;
2284 
2285  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2286  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2287  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2288  sc->stsz_sample_size = sc->sample_size;
2289  }
2290  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2291  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2292  sc->stsz_sample_size = sc->sample_size;
2293  }
2294 
2295  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2296  int keyframe = 0;
2297  if (current_sample >= sc->sample_count) {
2298  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2299  return;
2300  }
2301 
2302  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2303  keyframe = 1;
2304  if (stss_index + 1 < sc->keyframe_count)
2305  stss_index++;
2306  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2307  keyframe = 1;
2308  if (stps_index + 1 < sc->stps_count)
2309  stps_index++;
2310  }
2311  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2312  if (sc->rap_group[rap_group_index].index > 0)
2313  keyframe = 1;
2314  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2315  rap_group_sample = 0;
2316  rap_group_index++;
2317  }
2318  }
2319  if (sc->keyframe_absent
2320  && !sc->stps_count
2321  && !rap_group_present
2322  && (st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2323  keyframe = 1;
2324  if (keyframe)
2325  distance = 0;
2326  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2327  if (sc->pseudo_stream_id == -1 ||
2328  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2329  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2330  e->pos = current_offset;
2331  e->timestamp = current_dts;
2332  e->size = sample_size;
2333  e->min_distance = distance;
2334  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2335  av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2336  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2337  current_offset, current_dts, sample_size, distance, keyframe);
2338  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2339  ff_rfps_add_frame(mov->fc, st, current_dts);
2340  }
2341 
2342  current_offset += sample_size;
2343  stream_size += sample_size;
2344  current_dts += sc->stts_data[stts_index].duration;
2345  distance++;
2346  stts_sample++;
2347  current_sample++;
2348  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2349  stts_sample = 0;
2350  stts_index++;
2351  }
2352  }
2353  }
2354  if (st->duration > 0)
2355  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2356  } else {
2357  unsigned chunk_samples, total = 0;
2358 
2359  // compute total chunk count
2360  for (i = 0; i < sc->stsc_count; i++) {
2361  unsigned count, chunk_count;
2362 
2363  chunk_samples = sc->stsc_data[i].count;
2364  if (i != sc->stsc_count - 1 &&
2365  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2366  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2367  return;
2368  }
2369 
2370  if (sc->samples_per_frame >= 160) { // gsm
2371  count = chunk_samples / sc->samples_per_frame;
2372  } else if (sc->samples_per_frame > 1) {
2373  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2374  count = (chunk_samples+samples-1) / samples;
2375  } else {
2376  count = (chunk_samples+1023) / 1024;
2377  }
2378 
2379  if (i < sc->stsc_count - 1)
2380  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2381  else
2382  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2383  total += chunk_count * count;
2384  }
2385 
2386  av_dlog(mov->fc, "chunk count %d\n", total);
2387  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2388  return;
2390  st->nb_index_entries + total,
2391  sizeof(*st->index_entries)) < 0) {
2392  st->nb_index_entries = 0;
2393  return;
2394  }
2395  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2396 
2397  // populate index
2398  for (i = 0; i < sc->chunk_count; i++) {
2399  current_offset = sc->chunk_offsets[i];
2400  if (stsc_index + 1 < sc->stsc_count &&
2401  i + 1 == sc->stsc_data[stsc_index + 1].first)
2402  stsc_index++;
2403  chunk_samples = sc->stsc_data[stsc_index].count;
2404 
2405  while (chunk_samples > 0) {
2406  AVIndexEntry *e;
2407  unsigned size, samples;
2408 
2409  if (sc->samples_per_frame >= 160) { // gsm
2410  samples = sc->samples_per_frame;
2411  size = sc->bytes_per_frame;
2412  } else {
2413  if (sc->samples_per_frame > 1) {
2414  samples = FFMIN((1024 / sc->samples_per_frame)*
2415  sc->samples_per_frame, chunk_samples);
2416  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2417  } else {
2418  samples = FFMIN(1024, chunk_samples);
2419  size = samples * sc->sample_size;
2420  }
2421  }
2422 
2423  if (st->nb_index_entries >= total) {
2424  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2425  return;
2426  }
2427  e = &st->index_entries[st->nb_index_entries++];
2428  e->pos = current_offset;
2429  e->timestamp = current_dts;
2430  e->size = size;
2431  e->min_distance = 0;
2432  e->flags = AVINDEX_KEYFRAME;
2433  av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2434  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2435  size, samples);
2436 
2437  current_offset += size;
2438  current_dts += samples;
2439  chunk_samples -= samples;
2440  }
2441  }
2442  }
2443 }
2444 
2445 static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
2446  AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
2447 {
2448  /* try relative path, we do not try the absolute because it can leak information about our
2449  system to an attacker */
2450  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2451  char filename[1024];
2452  const char *src_path;
2453  int i, l;
2454 
2455  /* find a source dir */
2456  src_path = strrchr(src, '/');
2457  if (src_path)
2458  src_path++;
2459  else
2460  src_path = src;
2461 
2462  /* find a next level down to target */
2463  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2464  if (ref->path[l] == '/') {
2465  if (i == ref->nlvl_to - 1)
2466  break;
2467  else
2468  i++;
2469  }
2470 
2471  /* compose filename if next level down to target was found */
2472  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2473  memcpy(filename, src, src_path - src);
2474  filename[src_path - src] = 0;
2475 
2476  for (i = 1; i < ref->nlvl_from; i++)
2477  av_strlcat(filename, "../", 1024);
2478 
2479  av_strlcat(filename, ref->path + l + 1, 1024);
2480 
2481  if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2482  return 0;
2483  }
2484  } else if (use_absolute_path) {
2485  av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
2486  "this is a possible security issue\n");
2487  if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2488  return 0;
2489  }
2490 
2491  return AVERROR(ENOENT);
2492 }
2493 
2495 {
2496  if (sc->time_scale <= 0) {
2497  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2498  sc->time_scale = c->time_scale;
2499  if (sc->time_scale <= 0)
2500  sc->time_scale = 1;
2501  }
2502 }
2503 
2505 {
2506  AVStream *st;
2507  MOVStreamContext *sc;
2508  int ret;
2509 
2510  st = avformat_new_stream(c->fc, NULL);
2511  if (!st) return AVERROR(ENOMEM);
2512  st->id = c->fc->nb_streams;
2513  sc = av_mallocz(sizeof(MOVStreamContext));
2514  if (!sc) return AVERROR(ENOMEM);
2515 
2516  st->priv_data = sc;
2518  sc->ffindex = st->index;
2519 
2520  if ((ret = mov_read_default(c, pb, atom)) < 0)
2521  return ret;
2522 
2523  /* sanity checks */
2524  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2525  (!sc->sample_size && !sc->sample_count))) {
2526  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2527  st->index);
2528  return 0;
2529  }
2530 
2531  fix_timescale(c, sc);
2532 
2533  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2534 
2535  mov_build_index(c, st);
2536 
2537  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2538  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2539  if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
2540  c->use_absolute_path, c->fc) < 0)
2541  av_log(c->fc, AV_LOG_ERROR,
2542  "stream %d, error opening alias: path='%s', dir='%s', "
2543  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2544  st->index, dref->path, dref->dir, dref->filename,
2545  dref->volume, dref->nlvl_from, dref->nlvl_to);
2546  } else {
2547  sc->pb = c->fc->pb;
2548  sc->pb_is_copied = 1;
2549  }
2550 
2551  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2552  if (!st->sample_aspect_ratio.num &&
2553  (st->codec->width != sc->width || st->codec->height != sc->height)) {
2554  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2555  ((double)st->codec->width * sc->height), INT_MAX);
2556  }
2557 
2558 #if FF_API_R_FRAME_RATE
2559  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2561  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2562 #endif
2563  }
2564 
2565  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2566  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2567  TAG_IS_AVCI(st->codec->codec_tag)) {
2568  ret = ff_generate_avci_extradata(st);
2569  if (ret < 0)
2570  return ret;
2571  }
2572 
2573  switch (st->codec->codec_id) {
2574 #if CONFIG_H261_DECODER
2575  case AV_CODEC_ID_H261:
2576 #endif
2577 #if CONFIG_H263_DECODER
2578  case AV_CODEC_ID_H263:
2579 #endif
2580 #if CONFIG_MPEG4_DECODER
2581  case AV_CODEC_ID_MPEG4:
2582 #endif
2583  st->codec->width = 0; /* let decoder init width/height */
2584  st->codec->height= 0;
2585  break;
2586  }
2587 
2588  /* Do not need those anymore. */
2589  av_freep(&sc->chunk_offsets);
2590  av_freep(&sc->stsc_data);
2591  av_freep(&sc->sample_sizes);
2592  av_freep(&sc->keyframes);
2593  av_freep(&sc->stts_data);
2594  av_freep(&sc->stps_data);
2595  av_freep(&sc->rap_group);
2596 
2597  return 0;
2598 }
2599 
2601 {
2602  int ret;
2603  c->itunes_metadata = 1;
2604  ret = mov_read_default(c, pb, atom);
2605  c->itunes_metadata = 0;
2606  return ret;
2607 }
2608 
2610 {
2611  int64_t end = avio_tell(pb) + size;
2612  uint8_t *key = NULL, *val = NULL;
2613  int i;
2614  AVStream *st;
2615  MOVStreamContext *sc;
2616 
2617  if (c->fc->nb_streams < 1)
2618  return 0;
2619  st = c->fc->streams[c->fc->nb_streams-1];
2620  sc = st->priv_data;
2621 
2622  for (i = 0; i < 2; i++) {
2623  uint8_t **p;
2624  uint32_t len, tag;
2625 
2626  if (end - avio_tell(pb) <= 12)
2627  break;
2628 
2629  len = avio_rb32(pb);
2630  tag = avio_rl32(pb);
2631  avio_skip(pb, 4); // flags
2632 
2633  if (len < 12 || len - 12 > end - avio_tell(pb))
2634  break;
2635  len -= 12;
2636 
2637  if (tag == MKTAG('n', 'a', 'm', 'e'))
2638  p = &key;
2639  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
2640  avio_skip(pb, 4);
2641  len -= 4;
2642  p = &val;
2643  } else
2644  break;
2645 
2646  *p = av_malloc(len + 1);
2647  if (!*p)
2648  break;
2649  avio_read(pb, *p, len);
2650  (*p)[len] = 0;
2651  }
2652 
2653  if (key && val) {
2654  if (strcmp(key, "iTunSMPB") == 0) {
2655  int priming, remainder, samples;
2656  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
2657  if(priming>0 && priming<16384)
2658  sc->start_pad = priming;
2659  }
2660  }
2661  if (strcmp(key, "cdec") != 0) {
2662  av_dict_set(&c->fc->metadata, key, val,
2664  key = val = NULL;
2665  }
2666  }
2667 
2668  avio_seek(pb, end, SEEK_SET);
2669  av_freep(&key);
2670  av_freep(&val);
2671  return 0;
2672 }
2673 
2675 {
2676  int64_t end = avio_tell(pb) + atom.size;
2677  uint32_t tag, len;
2678 
2679  if (atom.size < 8)
2680  goto fail;
2681 
2682  len = avio_rb32(pb);
2683  tag = avio_rl32(pb);
2684 
2685  if (len > atom.size)
2686  goto fail;
2687 
2688  if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
2689  uint8_t domain[128];
2690  int domain_len;
2691 
2692  avio_skip(pb, 4); // flags
2693  len -= 12;
2694 
2695  domain_len = avio_get_str(pb, len, domain, sizeof(domain));
2696  avio_skip(pb, len - domain_len);
2697  return mov_read_custom_2plus(c, pb, end - avio_tell(pb));
2698  }
2699 
2700 fail:
2701  av_log(c->fc, AV_LOG_VERBOSE,
2702  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
2703  return 0;
2704 }
2705 
2707 {
2708  while (atom.size > 8) {
2709  uint32_t tag = avio_rl32(pb);
2710  atom.size -= 4;
2711  if (tag == MKTAG('h','d','l','r')) {
2712  avio_seek(pb, -8, SEEK_CUR);
2713  atom.size += 8;
2714  return mov_read_default(c, pb, atom);
2715  }
2716  }
2717  return 0;
2718 }
2719 
2721 {
2722  int i;
2723  int width;
2724  int height;
2725  int64_t disp_transform[2];
2726  int display_matrix[3][3];
2727  AVStream *st;
2728  MOVStreamContext *sc;
2729  int version;
2730  int flags;
2731 
2732  if (c->fc->nb_streams < 1)
2733  return 0;
2734  st = c->fc->streams[c->fc->nb_streams-1];
2735  sc = st->priv_data;
2736 
2737  version = avio_r8(pb);
2738  flags = avio_rb24(pb);
2740 
2741  if (version == 1) {
2742  avio_rb64(pb);
2743  avio_rb64(pb);
2744  } else {
2745  avio_rb32(pb); /* creation time */
2746  avio_rb32(pb); /* modification time */
2747  }
2748  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2749  avio_rb32(pb); /* reserved */
2750 
2751  /* highlevel (considering edits) duration in movie timebase */
2752  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2753  avio_rb32(pb); /* reserved */
2754  avio_rb32(pb); /* reserved */
2755 
2756  avio_rb16(pb); /* layer */
2757  avio_rb16(pb); /* alternate group */
2758  avio_rb16(pb); /* volume */
2759  avio_rb16(pb); /* reserved */
2760 
2761  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2762  // they're kept in fixed point format through all calculations
2763  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
2764  // side data, but the scale factor is not needed to calculate aspect ratio
2765  for (i = 0; i < 3; i++) {
2766  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2767  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2768  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
2769  }
2770 
2771  width = avio_rb32(pb); // 16.16 fixed point track width
2772  height = avio_rb32(pb); // 16.16 fixed point track height
2773  sc->width = width >> 16;
2774  sc->height = height >> 16;
2775 
2776  // save the matrix and add rotate metadata when it is not the default
2777  // identity
2778  if (display_matrix[0][0] != (1 << 16) ||
2779  display_matrix[1][1] != (1 << 16) ||
2780  display_matrix[2][2] != (1 << 30) ||
2781  display_matrix[0][1] || display_matrix[0][2] ||
2782  display_matrix[1][0] || display_matrix[1][2] ||
2783  display_matrix[2][0] || display_matrix[2][1]) {
2784  int i, j;
2785  double rotate;
2786 
2787  av_freep(&sc->display_matrix);
2788  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
2789  if (!sc->display_matrix)
2790  return AVERROR(ENOMEM);
2791 
2792  for (i = 0; i < 3; i++)
2793  for (j = 0; j < 3; j++)
2794  sc->display_matrix[i * 3 + j] = display_matrix[j][i];
2795 
2797  if (!isnan(rotate)) {
2798  char rotate_buf[64];
2799  rotate = -rotate;
2800  if (rotate < 0) // for backward compatibility
2801  rotate += 360;
2802  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
2803  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
2804  }
2805  }
2806 
2807  // transform the display width/height according to the matrix
2808  // skip this if the display matrix is the default identity matrix
2809  // or if it is rotating the picture, ex iPhone 3GS
2810  // to keep the same scale, use [width height 1<<16]
2811  if (width && height &&
2812  ((display_matrix[0][0] != 65536 ||
2813  display_matrix[1][1] != 65536) &&
2814  !display_matrix[0][1] &&
2815  !display_matrix[1][0] &&
2816  !display_matrix[2][0] && !display_matrix[2][1])) {
2817  for (i = 0; i < 2; i++)
2818  disp_transform[i] =
2819  (int64_t) width * display_matrix[0][i] +
2820  (int64_t) height * display_matrix[1][i] +
2821  ((int64_t) display_matrix[2][i] << 16);
2822 
2823  //sample aspect ratio is new width/height divided by old width/height
2825  ((double) disp_transform[0] * height) /
2826  ((double) disp_transform[1] * width), INT_MAX);
2827  }
2828  return 0;
2829 }
2830 
2832 {
2833  MOVFragment *frag = &c->fragment;
2834  MOVTrackExt *trex = NULL;
2835  MOVFragmentIndex* index = NULL;
2836  int flags, track_id, i;
2837 
2838  avio_r8(pb); /* version */
2839  flags = avio_rb24(pb);
2840 
2841  track_id = avio_rb32(pb);
2842  if (!track_id)
2843  return AVERROR_INVALIDDATA;
2844  frag->track_id = track_id;
2845  for (i = 0; i < c->trex_count; i++)
2846  if (c->trex_data[i].track_id == frag->track_id) {
2847  trex = &c->trex_data[i];
2848  break;
2849  }
2850  if (!trex) {
2851  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2852  return AVERROR_INVALIDDATA;
2853  }
2854  for (i = 0; i < c->fragment_index_count; i++) {
2855  MOVFragmentIndex* candidate = c->fragment_index_data[i];
2856  if (candidate->track_id == frag->track_id) {
2857  av_log(c->fc, AV_LOG_DEBUG,
2858  "found fragment index for track %u\n", frag->track_id);
2859  index = candidate;
2860  break;
2861  }
2862  }
2863 
2866  frag->moof_offset : frag->implicit_offset;
2867  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2868 
2869  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2870  avio_rb32(pb) : trex->duration;
2871  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2872  avio_rb32(pb) : trex->size;
2873  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2874  avio_rb32(pb) : trex->flags;
2875  frag->time = AV_NOPTS_VALUE;
2876  if (index) {
2877  int i, found = 0;
2878  for (i = index->current_item; i < index->item_count; i++) {
2879  if (frag->implicit_offset == index->items[i].moof_offset) {
2880  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
2881  "for track %u and moof_offset %"PRId64"\n",
2882  frag->track_id, index->items[i].moof_offset);
2883  frag->time = index->items[i].time;
2884  index->current_item = i + 1;
2885  found = 1;
2886  }
2887  }
2888  if (!found) {
2889  av_log(c->fc, AV_LOG_WARNING, "track %u has a fragment index "
2890  "but it doesn't have an (in-order) entry for moof_offset "
2891  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
2892  }
2893  }
2894  av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2895  return 0;
2896 }
2897 
2899 {
2900  c->chapter_track = avio_rb32(pb);
2901  return 0;
2902 }
2903 
2905 {
2906  MOVTrackExt *trex;
2907  int err;
2908 
2909  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2910  return AVERROR_INVALIDDATA;
2911  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2912  sizeof(*c->trex_data))) < 0) {
2913  c->trex_count = 0;
2914  return err;
2915  }
2916 
2917  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
2918 
2919  trex = &c->trex_data[c->trex_count++];
2920  avio_r8(pb); /* version */
2921  avio_rb24(pb); /* flags */
2922  trex->track_id = avio_rb32(pb);
2923  trex->stsd_id = avio_rb32(pb);
2924  trex->duration = avio_rb32(pb);
2925  trex->size = avio_rb32(pb);
2926  trex->flags = avio_rb32(pb);
2927  return 0;
2928 }
2929 
2931 {
2932  MOVFragment *frag = &c->fragment;
2933  AVStream *st = NULL;
2934  MOVStreamContext *sc;
2935  int version, i;
2936 
2937  for (i = 0; i < c->fc->nb_streams; i++) {
2938  if (c->fc->streams[i]->id == frag->track_id) {
2939  st = c->fc->streams[i];
2940  break;
2941  }
2942  }
2943  if (!st) {
2944  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2945  return AVERROR_INVALIDDATA;
2946  }
2947  sc = st->priv_data;
2948  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
2949  return 0;
2950  version = avio_r8(pb);
2951  avio_rb24(pb); /* flags */
2952  if (version) {
2953  sc->track_end = avio_rb64(pb);
2954  } else {
2955  sc->track_end = avio_rb32(pb);
2956  }
2957  return 0;
2958 }
2959 
2961 {
2962  MOVFragment *frag = &c->fragment;
2963  AVStream *st = NULL;
2964  MOVStreamContext *sc;
2965  MOVStts *ctts_data;
2966  uint64_t offset;
2967  int64_t dts;
2968  int data_offset = 0;
2969  unsigned entries, first_sample_flags = frag->flags;
2970  int flags, distance, i, found_keyframe = 0, err;
2971 
2972  for (i = 0; i < c->fc->nb_streams; i++) {
2973  if (c->fc->streams[i]->id == frag->track_id) {
2974  st = c->fc->streams[i];
2975  break;
2976  }
2977  }
2978  if (!st) {
2979  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2980  return AVERROR_INVALIDDATA;
2981  }
2982  sc = st->priv_data;
2983  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
2984  return 0;
2985  avio_r8(pb); /* version */
2986  flags = avio_rb24(pb);
2987  entries = avio_rb32(pb);
2988  av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2989 
2990  /* Always assume the presence of composition time offsets.
2991  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2992  * 1) in the initial movie, there are no samples.
2993  * 2) in the first movie fragment, there is only one sample without composition time offset.
2994  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2995  if (!sc->ctts_count && sc->sample_count)
2996  {
2997  /* Complement ctts table if moov atom doesn't have ctts atom. */
2998  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
2999  if (!ctts_data)
3000  return AVERROR(ENOMEM);
3001  sc->ctts_data = ctts_data;
3002  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
3003  sc->ctts_data[sc->ctts_count].duration = 0;
3004  sc->ctts_count++;
3005  }
3006  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
3007  return AVERROR_INVALIDDATA;
3008  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
3009  sizeof(*sc->ctts_data))) < 0) {
3010  sc->ctts_count = 0;
3011  return err;
3012  }
3013  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
3014  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
3015  dts = sc->track_end - sc->time_offset;
3016  offset = frag->base_data_offset + data_offset;
3017  distance = 0;
3018  av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
3019  for (i = 0; i < entries && !pb->eof_reached; i++) {
3020  unsigned sample_size = frag->size;
3021  int sample_flags = i ? frag->flags : first_sample_flags;
3022  unsigned sample_duration = frag->duration;
3023  int keyframe = 0;
3024 
3025  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
3026  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
3027  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
3028  sc->ctts_data[sc->ctts_count].count = 1;
3029  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
3030  avio_rb32(pb) : 0;
3032  if (frag->time != AV_NOPTS_VALUE) {
3033  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
3034  int64_t pts = frag->time;
3035  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3036  " sc->dts_shift %d ctts.duration %d"
3037  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
3038  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
3039  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
3040  dts = pts - sc->dts_shift;
3041  if (flags & MOV_TRUN_SAMPLE_CTS) {
3042  dts -= sc->ctts_data[sc->ctts_count].duration;
3043  } else {
3044  dts -= sc->time_offset;
3045  }
3046  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
3047  } else {
3048  dts = frag->time;
3049  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3050  ", using it for dts\n", dts);
3051  }
3052  frag->time = AV_NOPTS_VALUE;
3053  }
3054  sc->ctts_count++;
3055  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3056  keyframe = 1;
3057  else if (!found_keyframe)
3058  keyframe = found_keyframe =
3059  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
3061  if (keyframe)
3062  distance = 0;
3063  av_add_index_entry(st, offset, dts, sample_size, distance,
3064  keyframe ? AVINDEX_KEYFRAME : 0);
3065  av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3066  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
3067  offset, dts, sample_size, distance, keyframe);
3068  distance++;
3069  dts += sample_duration;
3070  offset += sample_size;
3071  sc->data_size += sample_size;
3072  sc->duration_for_fps += sample_duration;
3073  sc->nb_frames_for_fps ++;
3074  }
3075 
3076  if (pb->eof_reached)
3077  return AVERROR_EOF;
3078 
3079  frag->implicit_offset = offset;
3080  st->duration = sc->track_end = dts + sc->time_offset;
3081  return 0;
3082 }
3083 
3084 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
3085 /* like the files created with Adobe Premiere 5.0, for samples see */
3086 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
3088 {
3089  int err;
3090 
3091  if (atom.size < 8)
3092  return 0; /* continue */
3093  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
3094  avio_skip(pb, atom.size - 4);
3095  return 0;
3096  }
3097  atom.type = avio_rl32(pb);
3098  atom.size -= 8;
3099  if (atom.type != MKTAG('m','d','a','t')) {
3100  avio_skip(pb, atom.size);
3101  return 0;
3102  }
3103  err = mov_read_mdat(c, pb, atom);
3104  return err;
3105 }
3106 
3108 {
3109 #if CONFIG_ZLIB
3110  AVIOContext ctx;
3111  uint8_t *cmov_data;
3112  uint8_t *moov_data; /* uncompressed data */
3113  long cmov_len, moov_len;
3114  int ret = -1;
3115 
3116  avio_rb32(pb); /* dcom atom */
3117  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
3118  return AVERROR_INVALIDDATA;
3119  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
3120  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
3121  return AVERROR_INVALIDDATA;
3122  }
3123  avio_rb32(pb); /* cmvd atom */
3124  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
3125  return AVERROR_INVALIDDATA;
3126  moov_len = avio_rb32(pb); /* uncompressed size */
3127  cmov_len = atom.size - 6 * 4;
3128 
3129  cmov_data = av_malloc(cmov_len);
3130  if (!cmov_data)
3131  return AVERROR(ENOMEM);
3132  moov_data = av_malloc(moov_len);
3133  if (!moov_data) {
3134  av_free(cmov_data);
3135  return AVERROR(ENOMEM);
3136  }
3137  avio_read(pb, cmov_data, cmov_len);
3138  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
3139  goto free_and_return;
3140  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
3141  goto free_and_return;
3142  atom.type = MKTAG('m','o','o','v');
3143  atom.size = moov_len;
3144  ret = mov_read_default(c, &ctx, atom);
3145 free_and_return:
3146  av_free(moov_data);
3147  av_free(cmov_data);
3148  return ret;
3149 #else
3150  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
3151  return AVERROR(ENOSYS);
3152 #endif
3153 }
3154 
3155 /* edit list atom */
3157 {
3158  MOVStreamContext *sc;
3159  int i, edit_count, version, edit_start_index = 0;
3160  int unsupported = 0;
3161 
3162  if (c->fc->nb_streams < 1 || c->ignore_editlist)
3163  return 0;
3164  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
3165 
3166  version = avio_r8(pb); /* version */
3167  avio_rb24(pb); /* flags */
3168  edit_count = avio_rb32(pb); /* entries */
3169 
3170  if ((uint64_t)edit_count*12+8 > atom.size)
3171  return AVERROR_INVALIDDATA;
3172 
3173  av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3174  for (i=0; i<edit_count; i++){
3175  int64_t time;
3176  int64_t duration;
3177  int rate;
3178  if (version == 1) {
3179  duration = avio_rb64(pb);
3180  time = avio_rb64(pb);
3181  } else {
3182  duration = avio_rb32(pb); /* segment duration */
3183  time = (int32_t)avio_rb32(pb); /* media time */
3184  }
3185  rate = avio_rb32(pb);
3186  if (i == 0 && time == -1) {
3187  sc->empty_duration = duration;
3188  edit_start_index = 1;
3189  } else if (i == edit_start_index && time >= 0)
3190  sc->start_time = time;
3191  else
3192  unsupported = 1;
3193 
3194  av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3195  duration, time, rate / 65536.0);
3196  }
3197 
3198  if (unsupported)
3199  av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
3200  "a/v desync might occur, patch welcome\n");
3201 
3202  return 0;
3203 }
3204 
3206 {
3207  MOVStreamContext *sc;
3208 
3209  if (c->fc->nb_streams < 1)
3210  return AVERROR_INVALIDDATA;
3211  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3212  sc->timecode_track = avio_rb32(pb);
3213  return 0;
3214 }
3215 
3217 {
3218  int ret;
3219  uint8_t uuid[16];
3220  static const uint8_t uuid_isml_manifest[] = {
3221  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3222  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3223  };
3224 
3225  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3226  return AVERROR_INVALIDDATA;
3227 
3228  ret = avio_read(pb, uuid, sizeof(uuid));
3229  if (ret < 0) {
3230  return ret;
3231  } else if (ret != sizeof(uuid)) {
3232  return AVERROR_INVALIDDATA;
3233  }
3234  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3235  uint8_t *buffer, *ptr;
3236  char *endptr;
3237  size_t len = atom.size - sizeof(uuid);
3238 
3239  if (len < 4) {
3240  return AVERROR_INVALIDDATA;
3241  }
3242  ret = avio_skip(pb, 4); // zeroes
3243  len -= 4;
3244 
3245  buffer = av_mallocz(len + 1);
3246  if (!buffer) {
3247  return AVERROR(ENOMEM);
3248  }
3249  ret = avio_read(pb, buffer, len);
3250  if (ret < 0) {
3251  av_free(buffer);
3252  return ret;
3253  } else if (ret != len) {
3254  av_free(buffer);
3255  return AVERROR_INVALIDDATA;
3256  }
3257 
3258  ptr = buffer;
3259  while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
3260  ptr += sizeof("systemBitrate=\"") - 1;
3261  c->bitrates_count++;
3262  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3263  if (!c->bitrates) {
3264  c->bitrates_count = 0;
3265  av_free(buffer);
3266  return AVERROR(ENOMEM);
3267  }
3268  errno = 0;
3269  ret = strtol(ptr, &endptr, 10);
3270  if (ret < 0 || errno || *endptr != '"') {
3271  c->bitrates[c->bitrates_count - 1] = 0;
3272  } else {
3273  c->bitrates[c->bitrates_count - 1] = ret;
3274  }
3275  }
3276 
3277  av_free(buffer);
3278  }
3279  return 0;
3280 }
3281 
3283 {
3284  int ret;
3285  uint8_t content[16];
3286 
3287  if (atom.size < 8)
3288  return 0;
3289 
3290  ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
3291  if (ret < 0)
3292  return ret;
3293 
3294  if ( !c->found_moov
3295  && !c->found_mdat
3296  && !memcmp(content, "Anevia\x1A\x1A", 8)
3299  }
3300 
3301  return 0;
3302 }
3303 
3305 { MKTAG('A','C','L','R'), mov_read_avid },
3306 { MKTAG('A','P','R','G'), mov_read_avid },
3307 { MKTAG('A','A','L','P'), mov_read_avid },
3308 { MKTAG('A','R','E','S'), mov_read_ares },
3309 { MKTAG('a','v','s','s'), mov_read_avss },
3310 { MKTAG('c','h','p','l'), mov_read_chpl },
3311 { MKTAG('c','o','6','4'), mov_read_stco },
3312 { MKTAG('c','o','l','r'), mov_read_colr },
3313 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
3314 { MKTAG('d','i','n','f'), mov_read_default },
3315 { MKTAG('d','r','e','f'), mov_read_dref },
3316 { MKTAG('e','d','t','s'), mov_read_default },
3317 { MKTAG('e','l','s','t'), mov_read_elst },
3318 { MKTAG('e','n','d','a'), mov_read_enda },
3319 { MKTAG('f','i','e','l'), mov_read_fiel },
3320 { MKTAG('f','t','y','p'), mov_read_ftyp },
3321 { MKTAG('g','l','b','l'), mov_read_glbl },
3322 { MKTAG('h','d','l','r'), mov_read_hdlr },
3323 { MKTAG('i','l','s','t'), mov_read_ilst },
3324 { MKTAG('j','p','2','h'), mov_read_jp2h },
3325 { MKTAG('m','d','a','t'), mov_read_mdat },
3326 { MKTAG('m','d','h','d'), mov_read_mdhd },
3327 { MKTAG('m','d','i','a'), mov_read_default },
3328 { MKTAG('m','e','t','a'), mov_read_meta },
3329 { MKTAG('m','i','n','f'), mov_read_default },
3330 { MKTAG('m','o','o','f'), mov_read_moof },
3331 { MKTAG('m','o','o','v'), mov_read_moov },
3332 { MKTAG('m','v','e','x'), mov_read_default },
3333 { MKTAG('m','v','h','d'), mov_read_mvhd },
3334 { MKTAG('S','M','I',' '), mov_read_svq3 },
3335 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
3336 { MKTAG('a','v','c','C'), mov_read_glbl },
3337 { MKTAG('p','a','s','p'), mov_read_pasp },
3338 { MKTAG('s','t','b','l'), mov_read_default },
3339 { MKTAG('s','t','c','o'), mov_read_stco },
3340 { MKTAG('s','t','p','s'), mov_read_stps },
3341 { MKTAG('s','t','r','f'), mov_read_strf },
3342 { MKTAG('s','t','s','c'), mov_read_stsc },
3343 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
3344 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
3345 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
3346 { MKTAG('s','t','t','s'), mov_read_stts },
3347 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
3348 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
3349 { MKTAG('t','f','d','t'), mov_read_tfdt },
3350 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
3351 { MKTAG('t','r','a','k'), mov_read_trak },
3352 { MKTAG('t','r','a','f'), mov_read_default },
3353 { MKTAG('t','r','e','f'), mov_read_default },
3354 { MKTAG('t','m','c','d'), mov_read_tmcd },
3355 { MKTAG('c','h','a','p'), mov_read_chap },
3356 { MKTAG('t','r','e','x'), mov_read_trex },
3357 { MKTAG('t','r','u','n'), mov_read_trun },
3358 { MKTAG('u','d','t','a'), mov_read_default },
3359 { MKTAG('w','a','v','e'), mov_read_wave },
3360 { MKTAG('e','s','d','s'), mov_read_esds },
3361 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
3362 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
3363 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
3364 { MKTAG('w','f','e','x'), mov_read_wfex },
3365 { MKTAG('c','m','o','v'), mov_read_cmov },
3366 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
3367 { MKTAG('d','v','c','1'), mov_read_dvc1 },
3368 { MKTAG('s','b','g','p'), mov_read_sbgp },
3369 { MKTAG('h','v','c','C'), mov_read_glbl },
3370 { MKTAG('u','u','i','d'), mov_read_uuid },
3371 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
3372 { MKTAG('f','r','e','e'), mov_read_free },
3373 { MKTAG('-','-','-','-'), mov_read_custom },
3374 { 0, NULL }
3375 };
3376 
3378 {
3379  int64_t total_size = 0;
3380  MOVAtom a;
3381  int i;
3382 
3383  if (atom.size < 0)
3384  atom.size = INT64_MAX;
3385  while (total_size + 8 <= atom.size && !avio_feof(pb)) {
3386  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
3387  a.size = atom.size;
3388  a.type=0;
3389  if (atom.size >= 8) {
3390  a.size = avio_rb32(pb);
3391  a.type = avio_rl32(pb);
3392  if (a.type == MKTAG('f','r','e','e') &&
3393  a.size >= 8 &&
3394  c->moov_retry) {
3395  uint8_t buf[8];
3396  uint32_t *type = (uint32_t *)buf + 1;
3397  avio_read(pb, buf, 8);
3398  avio_seek(pb, -8, SEEK_CUR);
3399  if (*type == MKTAG('m','v','h','d') ||
3400  *type == MKTAG('c','m','o','v')) {
3401  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
3402  a.type = MKTAG('m','o','o','v');
3403  }
3404  }
3405  if (atom.type != MKTAG('r','o','o','t') &&
3406  atom.type != MKTAG('m','o','o','v'))
3407  {
3408  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
3409  {
3410  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
3411  avio_skip(pb, -8);
3412  return 0;
3413  }
3414  }
3415  total_size += 8;
3416  if (a.size == 1) { /* 64 bit extended size */
3417  a.size = avio_rb64(pb) - 8;
3418  total_size += 8;
3419  }
3420  }
3421  av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3422  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3423  if (a.size == 0) {
3424  a.size = atom.size - total_size + 8;
3425  }
3426  a.size -= 8;
3427  if (a.size < 0)
3428  break;
3429  a.size = FFMIN(a.size, atom.size - total_size);
3430 
3431  for (i = 0; mov_default_parse_table[i].type; i++)
3432  if (mov_default_parse_table[i].type == a.type) {
3433  parse = mov_default_parse_table[i].parse;
3434  break;
3435  }
3436 
3437  // container is user data
3438  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3439  atom.type == MKTAG('i','l','s','t')))
3441 
3442  if (!parse) { /* skip leaf atoms data */
3443  avio_skip(pb, a.size);
3444  } else {
3445  int64_t start_pos = avio_tell(pb);
3446  int64_t left;
3447  int err = parse(c, pb, a);
3448  if (err < 0)
3449  return err;
3450  if (c->found_moov && c->found_mdat &&
3451  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3452  start_pos + a.size == avio_size(pb))) {
3453  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3454  c->next_root_atom = start_pos + a.size;
3455  return 0;
3456  }
3457  left = a.size - avio_tell(pb) + start_pos;
3458  if (left > 0) /* skip garbage at atom end */
3459  avio_skip(pb, left);
3460  else if (left < 0) {
3461  av_log(c->fc, AV_LOG_WARNING,
3462  "overread end of atom '%.4s' by %"PRId64" bytes\n",
3463  (char*)&a.type, -left);
3464  avio_seek(pb, left, SEEK_CUR);
3465  }
3466  }
3467 
3468  total_size += a.size;
3469  }
3470 
3471  if (total_size < atom.size && atom.size < 0x7ffff)
3472  avio_skip(pb, atom.size - total_size);
3473 
3474  return 0;
3475 }
3476 
3477 static int mov_probe(AVProbeData *p)
3478 {
3479  int64_t offset;
3480  uint32_t tag;
3481  int score = 0;
3482  int moov_offset = -1;
3483 
3484  /* check file header */
3485  offset = 0;
3486  for (;;) {
3487  /* ignore invalid offset */
3488  if ((offset + 8) > (unsigned int)p->buf_size)
3489  break;
3490  tag = AV_RL32(p->buf + offset + 4);
3491  switch(tag) {
3492  /* check for obvious tags */
3493  case MKTAG('m','o','o','v'):
3494  moov_offset = offset + 4;
3495  case MKTAG('m','d','a','t'):
3496  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3497  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3498  case MKTAG('f','t','y','p'):
3499  if (AV_RB32(p->buf+offset) < 8 &&
3500  (AV_RB32(p->buf+offset) != 1 ||
3501  offset + 12 > (unsigned int)p->buf_size ||
3502  AV_RB64(p->buf+offset + 8) == 0)) {
3503  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3504  } else if (tag == MKTAG('f','t','y','p') &&
3505  AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')) {
3506  score = FFMAX(score, 5);
3507  } else {
3508  score = AVPROBE_SCORE_MAX;
3509  }
3510  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3511  break;
3512  /* those are more common words, so rate then a bit less */
3513  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3514  case MKTAG('w','i','d','e'):
3515  case MKTAG('f','r','e','e'):
3516  case MKTAG('j','u','n','k'):
3517  case MKTAG('p','i','c','t'):
3518  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3519  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3520  break;
3521  case MKTAG(0x82,0x82,0x7f,0x7d):
3522  case MKTAG('s','k','i','p'):
3523  case MKTAG('u','u','i','d'):
3524  case MKTAG('p','r','f','l'):
3525  /* if we only find those cause probedata is too small at least rate them */
3526  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3527  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3528  break;
3529  default:
3530  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3531  }
3532  }
3533  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3534  /* moov atom in the header - we should make sure that this is not a
3535  * MOV-packed MPEG-PS */
3536  offset = moov_offset;
3537 
3538  while(offset < (p->buf_size - 16)){ /* Sufficient space */
3539  /* We found an actual hdlr atom */
3540  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3541  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3542  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3543  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3544  /* We found a media handler reference atom describing an
3545  * MPEG-PS-in-MOV, return a
3546  * low score to force expanding the probe window until
3547  * mpegps_probe finds what it needs */
3548  return 5;
3549  }else
3550  /* Keep looking */
3551  offset+=2;
3552  }
3553  }
3554 
3555  return score;
3556 }
3557 
3558 // must be done after parsing all trak because there's no order requirement
3560 {
3561  MOVContext *mov = s->priv_data;
3562  AVStream *st = NULL;
3563  MOVStreamContext *sc;
3564  int64_t cur_pos;
3565  int i;
3566 
3567  for (i = 0; i < s->nb_streams; i++)
3568  if (s->streams[i]->id == mov->chapter_track) {
3569  st = s->streams[i];
3570  break;
3571  }
3572  if (!st) {
3573  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3574  return;
3575  }
3576 
3577  st->discard = AVDISCARD_ALL;
3578  sc = st->priv_data;
3579  cur_pos = avio_tell(sc->pb);
3580 
3581  for (i = 0; i < st->nb_index_entries; i++) {
3582  AVIndexEntry *sample = &st->index_entries[i];
3583  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3584  uint8_t *title;
3585  uint16_t ch;
3586  int len, title_len;
3587 
3588  if (end < sample->timestamp) {
3589  av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
3590  end = AV_NOPTS_VALUE;
3591  }
3592 
3593  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3594  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3595  goto finish;
3596  }
3597 
3598  // the first two bytes are the length of the title
3599  len = avio_rb16(sc->pb);
3600  if (len > sample->size-2)
3601  continue;
3602  title_len = 2*len + 1;
3603  if (!(title = av_mallocz(title_len)))
3604  goto finish;
3605 
3606  // The samples could theoretically be in any encoding if there's an encd
3607  // atom following, but in practice are only utf-8 or utf-16, distinguished
3608  // instead by the presence of a BOM
3609  if (!len) {
3610  title[0] = 0;
3611  } else {
3612  ch = avio_rb16(sc->pb);
3613  if (ch == 0xfeff)
3614  avio_get_str16be(sc->pb, len, title, title_len);
3615  else if (ch == 0xfffe)
3616  avio_get_str16le(sc->pb, len, title, title_len);
3617  else {
3618  AV_WB16(title, ch);
3619  if (len == 1 || len == 2)
3620  title[len] = 0;
3621  else
3622  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3623  }
3624  }
3625 
3626  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3627  av_freep(&title);
3628  }
3629 finish:
3630  avio_seek(sc->pb, cur_pos, SEEK_SET);
3631 }
3632 
3634  uint32_t value, int flags)
3635 {
3636  AVTimecode tc;
3637  char buf[AV_TIMECODE_STR_SIZE];
3638  AVRational rate = {st->codec->time_base.den,
3639  st->codec->time_base.num};
3640  int ret = av_timecode_init(&tc, rate, flags, 0, s);
3641  if (ret < 0)
3642  return ret;
3643  av_dict_set(&st->metadata, "timecode",
3644  av_timecode_make_string(&tc, buf, value), 0);
3645  return 0;
3646 }
3647 
3649 {
3650  MOVStreamContext *sc = st->priv_data;
3651  int flags = 0;
3652  int64_t cur_pos = avio_tell(sc->pb);
3653  uint32_t value;
3654 
3655  if (!st->nb_index_entries)
3656  return -1;
3657 
3658  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3659  value = avio_rb32(s->pb);
3660 
3661  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3662  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3663  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3664 
3665  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3666  * not the case) and thus assume "frame number format" instead of QT one.
3667  * No sample with tmcd track can be found with a QT timecode at the moment,
3668  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3669  * format). */
3670  parse_timecode_in_framenum_format(s, st, value, flags);
3671 
3672  avio_seek(sc->pb, cur_pos, SEEK_SET);
3673  return 0;
3674 }
3675 
3677 {
3678  MOVContext *mov = s->priv_data;
3679  int i, j;
3680 
3681  for (i = 0; i < s->nb_streams; i++) {
3682  AVStream *st = s->streams[i];
3683  MOVStreamContext *sc = st->priv_data;
3684 
3685  av_freep(&sc->ctts_data);
3686  for (j = 0; j < sc->drefs_count; j++) {
3687  av_freep(&sc->drefs[j].path);
3688  av_freep(&sc->drefs[j].dir);
3689  }
3690  av_freep(&sc->drefs);
3691 
3692  sc->drefs_count = 0;
3693 
3694  if (!sc->pb_is_copied)
3695  avio_close(sc->pb);
3696 
3697  sc->pb = NULL;
3698  av_freep(&sc->chunk_offsets);
3699  av_freep(&sc->stsc_data);
3700  av_freep(&sc->sample_sizes);
3701  av_freep(&sc->keyframes);
3702  av_freep(&sc->stts_data);
3703  av_freep(&sc->stps_data);
3704  av_freep(&sc->rap_group);
3705  av_freep(&sc->display_matrix);
3706  }
3707 
3708  if (mov->dv_demux) {
3710  mov->dv_fctx = NULL;
3711  }
3712 
3713  av_freep(&mov->trex_data);
3714  av_freep(&mov->bitrates);
3715 
3716  for (i = 0; i < mov->fragment_index_count; i++) {
3718  av_freep(&index->items);
3719  av_freep(&mov->fragment_index_data[i]);
3720  }
3722 
3723  return 0;
3724 }
3725 
3726 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
3727 {
3728  int i;
3729 
3730  for (i = 0; i < s->nb_streams; i++) {
3731  AVStream *st = s->streams[i];
3732  MOVStreamContext *sc = st->priv_data;
3733 
3734  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3735  sc->timecode_track == tmcd_id)
3736  return 1;
3737  }
3738  return 0;
3739 }
3740 
3741 /* look for a tmcd track not referenced by any video track, and export it globally */
3743 {
3744  int i;
3745 
3746  for (i = 0; i < s->nb_streams; i++) {
3747  AVStream *st = s->streams[i];
3748 
3749  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
3750  !tmcd_is_referenced(s, i + 1)) {
3751  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
3752  if (tcr) {
3753  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
3754  break;
3755  }
3756  }
3757  }
3758 }
3759 
3760 static int read_tfra(MOVContext *mov, AVIOContext *f)
3761 {
3762  MOVFragmentIndex* index = NULL;
3763  int version, fieldlength, i, j, err;
3764  int64_t pos = avio_tell(f);
3765  uint32_t size = avio_rb32(f);
3766  if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a')) {
3767  return -1;
3768  }
3769  av_log(mov->fc, AV_LOG_VERBOSE, "found tfra\n");
3770  index = av_mallocz(sizeof(MOVFragmentIndex));
3771  if (!index) {
3772  return AVERROR(ENOMEM);
3773  }
3774  mov->fragment_index_count++;
3775  if ((err = av_reallocp(&mov->fragment_index_data,
3776  mov->fragment_index_count *
3777  sizeof(MOVFragmentIndex*))) < 0) {
3778  av_freep(&index);
3779  return err;
3780  }
3781  mov->fragment_index_data[mov->fragment_index_count - 1] =
3782  index;
3783 
3784  version = avio_r8(f);
3785  avio_rb24(f);
3786  index->track_id = avio_rb32(f);
3787  fieldlength = avio_rb32(f);
3788  index->item_count = avio_rb32(f);
3789  index->items = av_mallocz(
3790  index->item_count * sizeof(MOVFragmentIndexItem));
3791  if (!index->items) {
3792  return AVERROR(ENOMEM);
3793  }
3794  for (i = 0; i < index->item_count; i++) {
3795  int64_t time, offset;
3796  if (version == 1) {
3797  time = avio_rb64(f);
3798  offset = avio_rb64(f);
3799  } else {
3800  time = avio_rb32(f);
3801  offset = avio_rb32(f);
3802  }
3803  index->items[i].time = time;
3804  index->items[i].moof_offset = offset;
3805  for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
3806  avio_r8(f);
3807  for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
3808  avio_r8(f);
3809  for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
3810  avio_r8(f);
3811  }
3812 
3813  avio_seek(f, pos + size, SEEK_SET);
3814  return 0;
3815 }
3816 
3818 {
3819  int64_t stream_size = avio_size(f);
3820  int64_t original_pos = avio_tell(f);
3821  int32_t mfra_size;
3822  int ret = -1;
3823  if ((ret = avio_seek(f, stream_size - 4, SEEK_SET)) < 0) goto fail;
3824  mfra_size = avio_rb32(f);
3825  if (mfra_size < 0 || mfra_size > stream_size) {
3826  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (unreasonable size)\n");
3827  ret = -1;
3828  goto fail;
3829  }
3830  if ((ret = avio_seek(f, -mfra_size, SEEK_CUR)) < 0) goto fail;
3831  if (avio_rb32(f) != mfra_size) {
3832  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (size mismatch)\n");
3833  ret = -1;
3834  goto fail;
3835  }
3836  if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
3837  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (tag mismatch)\n");
3838  goto fail;
3839  }
3840  av_log(c->fc, AV_LOG_VERBOSE, "stream has mfra\n");
3841  while (!read_tfra(c, f)) {
3842  /* Empty */
3843  }
3844 fail:
3845  ret = avio_seek(f, original_pos, SEEK_SET);
3846  if (ret < 0)
3847  av_log(c->fc, AV_LOG_ERROR,
3848  "failed to seek back after looking for mfra\n");
3849  else
3850  ret = 0;
3851  return ret;
3852 }
3853 
3855 {
3856  MOVContext *mov = s->priv_data;
3857  AVIOContext *pb = s->pb;
3858  int j, err;
3859  MOVAtom atom = { AV_RL32("root") };
3860  int i;
3861 
3862  mov->fc = s;
3863  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
3864  if (pb->seekable)
3865  atom.size = avio_size(pb);
3866  else
3867  atom.size = INT64_MAX;
3868 
3869  /* check MOV header */
3870  do {
3871  if (mov->moov_retry)
3872  avio_seek(pb, 0, SEEK_SET);
3873  if ((err = mov_read_default(mov, pb, atom)) < 0) {
3874  av_log(s, AV_LOG_ERROR, "error reading header\n");
3875  mov_read_close(s);
3876  return err;
3877  }
3878  } while (pb->seekable && !mov->found_moov && !mov->moov_retry++);
3879  if (!mov->found_moov) {
3880  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
3881  mov_read_close(s);
3882  return AVERROR_INVALIDDATA;
3883  }
3884  av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
3885 
3886  if (pb->seekable) {
3887  if (mov->chapter_track > 0)
3888  mov_read_chapters(s);
3889  for (i = 0; i < s->nb_streams; i++)
3890  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
3891  mov_read_timecode_track(s, s->streams[i]);
3892  }
3893 
3894  /* copy timecode metadata from tmcd tracks to the related video streams */
3895  for (i = 0; i < s->nb_streams; i++) {
3896  AVStream *st = s->streams[i];
3897  MOVStreamContext *sc = st->priv_data;
3898  if (sc->timecode_track > 0) {
3899  AVDictionaryEntry *tcr;
3900  int tmcd_st_id = -1;
3901 
3902  for (j = 0; j < s->nb_streams; j++)
3903  if (s->streams[j]->id == sc->timecode_track)
3904  tmcd_st_id = j;
3905 
3906  if (tmcd_st_id < 0 || tmcd_st_id == i)
3907  continue;
3908  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
3909  if (tcr)
3910  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
3911  }
3912  }
3914 
3915  for (i = 0; i < s->nb_streams; i++) {
3916  AVStream *st = s->streams[i];
3917  MOVStreamContext *sc = st->priv_data;
3918  fix_timescale(mov, sc);
3920  st->skip_samples = sc->start_pad;
3921  }
3922  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
3924  sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
3925  if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3926  if (st->codec->width <= 0 && st->codec->height <= 0) {
3927  st->codec->width = sc->width;
3928  st->codec->height = sc->height;
3929  }
3930  if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
3931  if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
3932  return err;
3933  }
3934  }
3935  }
3936 
3937  if (mov->trex_data) {
3938  for (i = 0; i < s->nb_streams; i++) {
3939  AVStream *st = s->streams[i];
3940  MOVStreamContext *sc = st->priv_data;
3941  if (st->duration > 0)
3942  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
3943  }
3944  }
3945 
3946  if (mov->use_mfra_for > 0) {
3947  for (i = 0; i < s->nb_streams; i++) {
3948  AVStream *st = s->streams[i];
3949  MOVStreamContext *sc = st->priv_data;
3950  if (sc->duration_for_fps > 0) {
3951  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale /
3952  sc->duration_for_fps;
3953  }
3954  }
3955  }
3956 
3957  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
3958  if (mov->bitrates[i]) {
3959  s->streams[i]->codec->bit_rate = mov->bitrates[i];
3960  }
3961  }
3962 
3963  ff_rfps_calculate(s);
3964 
3965  for (i = 0; i < s->nb_streams; i++) {
3966  AVStream *st = s->streams[i];
3967  MOVStreamContext *sc = st->priv_data;
3968 
3969  switch (st->codec->codec_type) {
3970  case AVMEDIA_TYPE_AUDIO:
3971  err = ff_replaygain_export(st, s->metadata);
3972  if (err < 0) {
3973  mov_read_close(s);
3974  return err;
3975  }
3976  break;
3977  case AVMEDIA_TYPE_VIDEO:
3978  if (sc->display_matrix) {
3979  AVPacketSideData *sd, *tmp;
3980 
3981  tmp = av_realloc_array(st->side_data,
3982  st->nb_side_data + 1, sizeof(*tmp));
3983  if (!tmp)
3984  return AVERROR(ENOMEM);
3985 
3986  st->side_data = tmp;
3987  st->nb_side_data++;
3988 
3989  sd = &st->side_data[st->nb_side_data - 1];
3991  sd->size = sizeof(int32_t) * 9;
3992  sd->data = (uint8_t*)sc->display_matrix;
3993  sc->display_matrix = NULL;
3994  }
3995  break;
3996  }
3997  }
3998 
3999  return 0;
4000 }
4001 
4003 {
4004  AVIndexEntry *sample = NULL;
4005  int64_t best_dts = INT64_MAX;
4006  int i;
4007  for (i = 0; i < s->nb_streams; i++) {
4008  AVStream *avst = s->streams[i];
4009  MOVStreamContext *msc = avst->priv_data;
4010  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
4011  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
4012  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
4013  av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
4014  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
4015  (s->pb->seekable &&
4016  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
4017  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
4018  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
4019  sample = current_sample;
4020  best_dts = dts;
4021  *st = avst;
4022  }
4023  }
4024  }
4025  return sample;
4026 }
4027 
4029 {
4030  MOVContext *mov = s->priv_data;
4031  MOVStreamContext *sc;
4033  AVStream *st = NULL;
4034  int ret;
4035  mov->fc = s;
4036  retry:
4037  sample = mov_find_next_sample(s, &st);
4038  if (!sample) {
4039  mov->found_mdat = 0;
4040  if (!mov->next_root_atom)
4041  return AVERROR_EOF;
4042  avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
4043  mov->next_root_atom = 0;
4044  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
4045  avio_feof(s->pb))
4046  return AVERROR_EOF;
4047  av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
4048  goto retry;
4049  }
4050  sc = st->priv_data;
4051  /* must be done just before reading, to avoid infinite loop on sample */
4052  sc->current_sample++;
4053 
4054  if (mov->next_root_atom) {
4055  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
4056  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
4057  }
4058 
4059  if (st->discard != AVDISCARD_ALL) {
4060  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
4061  av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
4062  sc->ffindex, sample->pos);
4063  return AVERROR_INVALIDDATA;
4064  }
4065  ret = av_get_packet(sc->pb, pkt, sample->size);
4066  if (ret < 0)
4067  return ret;
4068  if (sc->has_palette) {
4069  uint8_t *pal;
4070 
4072  if (!pal) {
4073  av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
4074  } else {
4075  memcpy(pal, sc->palette, AVPALETTE_SIZE);
4076  sc->has_palette = 0;
4077  }
4078  }
4079 #if CONFIG_DV_DEMUXER
4080  if (mov->dv_demux && sc->dv_audio_container) {
4081  avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
4082  av_free(pkt->data);
4083  pkt->size = 0;
4084  ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
4085  if (ret < 0)
4086  return ret;
4087  }
4088 #endif
4089  }
4090 
4091  pkt->stream_index = sc->ffindex;
4092  pkt->dts = sample->timestamp;
4093  if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
4094  pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
4095  /* update ctts context */
4096  sc->ctts_sample++;
4097  if (sc->ctts_index < sc->ctts_count &&
4098  sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
4099  sc->ctts_index++;
4100  sc->ctts_sample = 0;
4101  }
4102  if (sc->wrong_dts)
4103  pkt->dts = AV_NOPTS_VALUE;
4104  } else {
4105  int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
4107  pkt->duration = next_dts - pkt->dts;
4108  pkt->pts = pkt->dts;
4109  }
4110  if (st->discard == AVDISCARD_ALL)
4111  goto retry;
4112  pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
4113  pkt->pos = sample->pos;
4114  av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
4115  pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
4116  return 0;
4117 }
4118 
4119 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
4120 {
4121  MOVStreamContext *sc = st->priv_data;
4122  int sample, time_sample;
4123  int i;
4124 
4125  sample = av_index_search_timestamp(st, timestamp, flags);
4126  av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
4127  if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
4128  sample = 0;
4129  if (sample < 0) /* not sure what to do */
4130  return AVERROR_INVALIDDATA;
4131  sc->current_sample = sample;
4132  av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
4133  /* adjust ctts index */
4134  if (sc->ctts_data) {
4135  time_sample = 0;
4136  for (i = 0; i < sc->ctts_count; i++) {
4137  int next = time_sample + sc->ctts_data[i].count;
4138  if (next > sc->current_sample) {
4139  sc->ctts_index = i;
4140  sc->ctts_sample = sc->current_sample - time_sample;
4141  break;
4142  }
4143  time_sample = next;
4144  }
4145  }
4146  return sample;
4147 }
4148 
4149 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
4150 {
4151  AVStream *st;
4152  int64_t seek_timestamp, timestamp;
4153  int sample;
4154  int i;
4155 
4156  if (stream_index >= s->nb_streams)
4157  return AVERROR_INVALIDDATA;
4158 
4159  st = s->streams[stream_index];
4160  sample = mov_seek_stream(s, st, sample_time, flags);
4161  if (sample < 0)
4162  return sample;
4163 
4164  /* adjust seek timestamp to found sample timestamp */
4165  seek_timestamp = st->index_entries[sample].timestamp;
4166 
4167  for (i = 0; i < s->nb_streams; i++) {
4168  MOVStreamContext *sc = s->streams[i]->priv_data;
4169  st = s->streams[i];
4170  st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
4171 
4172  if (stream_index == i)
4173  continue;
4174 
4175  timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
4176  mov_seek_stream(s, st, timestamp, flags);
4177  }
4178  return 0;
4179 }
4180 
4181 static const AVOption options[] = {
4182  {"use_absolute_path",
4183  "allow using absolute path when opening alias, this is a possible security issue",
4184  offsetof(MOVContext, use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
4186  {"ignore_editlist", "", offsetof(MOVContext, ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
4188  {"use_mfra_for",
4189  "use mfra for fragment timestamps",
4190  offsetof(MOVContext, use_mfra_for), FF_OPT_TYPE_INT, {.i64 = FF_MOV_FLAG_MFRA_AUTO},
4192  "use_mfra_for"},
4193  {"auto", "auto", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_AUTO}, 0, 0,
4195  {"dts", "dts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_DTS}, 0, 0,
4197  {"pts", "pts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_PTS}, 0, 0,
4199  {NULL}
4200 };
4201 
4202 static const AVClass mov_class = {
4203  .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
4204  .item_name = av_default_item_name,
4205  .option = options,
4206  .version = LIBAVUTIL_VERSION_INT,
4207 };
4208 
4210  .name = "mov,mp4,m4a,3gp,3g2,mj2",
4211  .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
4212  .priv_data_size = sizeof(MOVContext),
4213  .extensions = "mov,mp4,m4a,3gp,3g2,mj2",
4214  .read_probe = mov_probe,
4219  .priv_class = &mov_class,
4221 };