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mov.c
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1 /*
2  * MOV demuxer
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5  *
6  * first version by Francois Revol <revol@free.fr>
7  * seek function by Gael Chardon <gael.dev@4now.net>
8  *
9  * This file is part of FFmpeg.
10  *
11  * FFmpeg is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * FFmpeg is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with FFmpeg; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
26 #include <limits.h>
27 
28 //#define MOV_EXPORT_ALL_METADATA
29 
30 #include "libavutil/attributes.h"
31 #include "libavutil/channel_layout.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/intfloat.h"
34 #include "libavutil/mathematics.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/dict.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/timecode.h"
39 #include "libavcodec/ac3tab.h"
40 #include "avformat.h"
41 #include "internal.h"
42 #include "avio_internal.h"
43 #include "riff.h"
44 #include "isom.h"
45 #include "libavcodec/get_bits.h"
46 #include "id3v1.h"
47 #include "mov_chan.h"
48 
49 #if CONFIG_ZLIB
50 #include <zlib.h>
51 #endif
52 
53 #include "qtpalette.h"
54 
55 
56 #undef NDEBUG
57 #include <assert.h>
58 
59 /* those functions parse an atom */
60 /* links atom IDs to parse functions */
61 typedef struct MOVParseTableEntry {
62  uint32_t type;
63  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
64 } MOVParseTableEntry;
65 
66 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
67 
68 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
69  unsigned len, const char *key)
70 {
71  char buf[16];
72 
73  short current, total = 0;
74  avio_rb16(pb); // unknown
75  current = avio_rb16(pb);
76  if (len >= 6)
77  total = avio_rb16(pb);
78  if (!total)
79  snprintf(buf, sizeof(buf), "%d", current);
80  else
81  snprintf(buf, sizeof(buf), "%d/%d", current, total);
82  av_dict_set(&c->fc->metadata, key, buf, 0);
83 
84  return 0;
85 }
86 
87 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
88  unsigned len, const char *key)
89 {
90  char buf[16];
91 
92  /* bypass padding bytes */
93  avio_r8(pb);
94  avio_r8(pb);
95  avio_r8(pb);
96 
97  snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
98  av_dict_set(&c->fc->metadata, key, buf, 0);
99 
100  return 0;
101 }
102 
103 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
104  unsigned len, const char *key)
105 {
106  char buf[16];
107 
108  snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
109  av_dict_set(&c->fc->metadata, key, buf, 0);
110 
111  return 0;
112 }
113 
114 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
115  unsigned len, const char *key)
116 {
117  short genre;
118  char buf[20];
119 
120  avio_r8(pb); // unknown
121 
122  genre = avio_r8(pb);
123  if (genre < 1 || genre > ID3v1_GENRE_MAX)
124  return 0;
125  snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
126  av_dict_set(&c->fc->metadata, key, buf, 0);
127 
128  return 0;
129 }
130 
131 static int mov_read_custom_metadata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
132 {
133  char key[1024]={0}, data[1024]={0};
134  int i;
135  AVStream *st;
136  MOVStreamContext *sc;
137 
138  if (c->fc->nb_streams < 1)
139  return 0;
140  st = c->fc->streams[c->fc->nb_streams-1];
141  sc = st->priv_data;
142 
143  if (atom.size <= 8) return 0;
144 
145  for (i = 0; i < 3; i++) { // Parse up to three sub-atoms looking for name and data.
146  int data_size = avio_rb32(pb);
147  int tag = avio_rl32(pb);
148  int str_size = 0, skip_size = 0;
149  char *target = NULL;
150 
151  switch (tag) {
152  case MKTAG('n','a','m','e'):
153  avio_rb32(pb); // version/flags
154  str_size = skip_size = data_size - 12;
155  atom.size -= 12;
156  target = key;
157  break;
158  case MKTAG('d','a','t','a'):
159  avio_rb32(pb); // version/flags
160  avio_rb32(pb); // reserved (zero)
161  str_size = skip_size = data_size - 16;
162  atom.size -= 16;
163  target = data;
164  break;
165  default:
166  skip_size = data_size - 8;
167  str_size = 0;
168  break;
169  }
170 
171  if (target) {
172  str_size = FFMIN3(sizeof(data)-1, str_size, atom.size);
173  avio_read(pb, target, str_size);
174  target[str_size] = 0;
175  }
176  atom.size -= skip_size;
177 
178  // If we didn't read the full data chunk for the sub-atom, skip to the end of it.
179  if (skip_size > str_size) avio_skip(pb, skip_size - str_size);
180  }
181 
182  if (*key && *data) {
183  if (strcmp(key, "iTunSMPB") == 0) {
184  int priming, remainder, samples;
185  if(sscanf(data, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
186  if(priming>0 && priming<16384)
187  sc->start_pad = priming;
188  return 1;
189  }
190  }
191  if (strcmp(key, "cdec") == 0) {
192 // av_dict_set(&st->metadata, key, data, 0);
193  return 1;
194  }
195  }
196  return 0;
197 }
198 
199 static const uint32_t mac_to_unicode[128] = {
200  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
201  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
202  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
203  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
204  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
205  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
206  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
207  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
208  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
209  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
210  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
211  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
212  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
213  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
214  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
215  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
216 };
217 
218 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
219  char *dst, int dstlen)
220 {
221  char *p = dst;
222  char *end = dst+dstlen-1;
223  int i;
224 
225  for (i = 0; i < len; i++) {
226  uint8_t t, c = avio_r8(pb);
227  if (c < 0x80 && p < end)
228  *p++ = c;
229  else if (p < end)
230  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
231  }
232  *p = 0;
233  return p - dst;
234 }
235 
236 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
237 {
238  AVPacket pkt;
239  AVStream *st;
240  MOVStreamContext *sc;
241  enum AVCodecID id;
242  int ret;
243 
244  switch (type) {
245  case 0xd: id = AV_CODEC_ID_MJPEG; break;
246  case 0xe: id = AV_CODEC_ID_PNG; break;
247  case 0x1b: id = AV_CODEC_ID_BMP; break;
248  default:
249  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
250  avio_skip(pb, len);
251  return 0;
252  }
253 
254  st = avformat_new_stream(c->fc, NULL);
255  if (!st)
256  return AVERROR(ENOMEM);
257  sc = av_mallocz(sizeof(*sc));
258  if (!sc)
259  return AVERROR(ENOMEM);
260  st->priv_data = sc;
261 
262  ret = av_get_packet(pb, &pkt, len);
263  if (ret < 0)
264  return ret;
265 
266  st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
267 
268  st->attached_pic = pkt;
269  st->attached_pic.stream_index = st->index;
270  st->attached_pic.flags |= AV_PKT_FLAG_KEY;
271 
272  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
273  st->codec->codec_id = id;
274 
275  return 0;
276 }
277 
278 static int mov_metadata_raw(MOVContext *c, AVIOContext *pb,
279  unsigned len, const char *key)
280 {
281  char *value = av_malloc(len + 1);
282  if (!value)
283  return AVERROR(ENOMEM);
284  avio_read(pb, value, len);
285  value[len] = 0;
286  return av_dict_set(&c->fc->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
287 }
288 
289 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
290 {
291 #ifdef MOV_EXPORT_ALL_METADATA
292  char tmp_key[5];
293 #endif
294  char str[1024], key2[16], language[4] = {0};
295  const char *key = NULL;
296  uint16_t langcode = 0;
297  uint32_t data_type = 0, str_size;
298  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
299 
300  if (c->itunes_metadata && atom.type == MKTAG('-','-','-','-'))
301  return mov_read_custom_metadata(c, pb, atom);
302 
303  switch (atom.type) {
304  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
305  case MKTAG(0xa9,'a','u','t'):
306  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
307  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
308  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
309  case MKTAG( 'c','p','r','t'):
310  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
311  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
312  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
313  case MKTAG(0xa9,'c','m','t'):
314  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
315  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
316  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
317  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
318  case MKTAG( 'g','n','r','e'): key = "genre";
319  parse = mov_metadata_gnre; break;
320  case MKTAG(0xa9,'t','o','o'):
321  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
322  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
323  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
324  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
325  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
326  case MKTAG( 'd','e','s','c'): key = "description";break;
327  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
328  case MKTAG( 't','v','s','h'): key = "show"; break;
329  case MKTAG( 't','v','e','n'): key = "episode_id";break;
330  case MKTAG( 't','v','n','n'): key = "network"; break;
331  case MKTAG( 't','r','k','n'): key = "track";
332  parse = mov_metadata_track_or_disc_number; break;
333  case MKTAG( 'd','i','s','k'): key = "disc";
334  parse = mov_metadata_track_or_disc_number; break;
335  case MKTAG( 't','v','e','s'): key = "episode_sort";
336  parse = mov_metadata_int8_bypass_padding; break;
337  case MKTAG( 't','v','s','n'): key = "season_number";
338  parse = mov_metadata_int8_bypass_padding; break;
339  case MKTAG( 's','t','i','k'): key = "media_type";
340  parse = mov_metadata_int8_no_padding; break;
341  case MKTAG( 'h','d','v','d'): key = "hd_video";
342  parse = mov_metadata_int8_no_padding; break;
343  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
344  parse = mov_metadata_int8_no_padding; break;
345  case MKTAG( '@','P','R','M'):
346  return mov_metadata_raw(c, pb, atom.size, "premiere_version");
347  case MKTAG( '@','P','R','Q'):
348  return mov_metadata_raw(c, pb, atom.size, "quicktime_version");
349  }
350 
351  if (c->itunes_metadata && atom.size > 8) {
352  int data_size = avio_rb32(pb);
353  int tag = avio_rl32(pb);
354  if (tag == MKTAG('d','a','t','a')) {
355  data_type = avio_rb32(pb); // type
356  avio_rb32(pb); // unknown
357  str_size = data_size - 16;
358  atom.size -= 16;
359 
360  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
361  int ret = mov_read_covr(c, pb, data_type, str_size);
362  if (ret < 0) {
363  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
364  return ret;
365  }
366  }
367  } else return 0;
368  } else if (atom.size > 4 && key && !c->itunes_metadata) {
369  str_size = avio_rb16(pb); // string length
370  langcode = avio_rb16(pb);
371  ff_mov_lang_to_iso639(langcode, language);
372  atom.size -= 4;
373  } else
374  str_size = atom.size;
375 
376 #ifdef MOV_EXPORT_ALL_METADATA
377  if (!key) {
378  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
379  key = tmp_key;
380  }
381 #endif
382 
383  if (!key)
384  return 0;
385  if (atom.size < 0)
386  return AVERROR_INVALIDDATA;
387 
388  str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
389 
390  if (parse)
391  parse(c, pb, str_size, key);
392  else {
393  if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
394  mov_read_mac_string(c, pb, str_size, str, sizeof(str));
395  } else {
396  avio_read(pb, str, str_size);
397  str[str_size] = 0;
398  }
399  av_dict_set(&c->fc->metadata, key, str, 0);
400  if (*language && strcmp(language, "und")) {
401  snprintf(key2, sizeof(key2), "%s-%s", key, language);
402  av_dict_set(&c->fc->metadata, key2, str, 0);
403  }
404  }
405  av_dlog(c->fc, "lang \"%3s\" ", language);
406  av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
407  key, str, (char*)&atom.type, str_size, atom.size);
408 
409  return 0;
410 }
411 
412 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
413 {
414  int64_t start;
415  int i, nb_chapters, str_len, version;
416  char str[256+1];
417 
418  if ((atom.size -= 5) < 0)
419  return 0;
420 
421  version = avio_r8(pb);
422  avio_rb24(pb);
423  if (version)
424  avio_rb32(pb); // ???
425  nb_chapters = avio_r8(pb);
426 
427  for (i = 0; i < nb_chapters; i++) {
428  if (atom.size < 9)
429  return 0;
430 
431  start = avio_rb64(pb);
432  str_len = avio_r8(pb);
433 
434  if ((atom.size -= 9+str_len) < 0)
435  return 0;
436 
437  avio_read(pb, str, str_len);
438  str[str_len] = 0;
439  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
440  }
441  return 0;
442 }
443 
444 #define MIN_DATA_ENTRY_BOX_SIZE 12
445 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
446 {
447  AVStream *st;
448  MOVStreamContext *sc;
449  int entries, i, j;
450 
451  if (c->fc->nb_streams < 1)
452  return 0;
453  st = c->fc->streams[c->fc->nb_streams-1];
454  sc = st->priv_data;
455 
456  avio_rb32(pb); // version + flags
457  entries = avio_rb32(pb);
458  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
459  entries >= UINT_MAX / sizeof(*sc->drefs))
460  return AVERROR_INVALIDDATA;
461  av_free(sc->drefs);
462  sc->drefs_count = 0;
463  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
464  if (!sc->drefs)
465  return AVERROR(ENOMEM);
466  sc->drefs_count = entries;
467 
468  for (i = 0; i < sc->drefs_count; i++) {
469  MOVDref *dref = &sc->drefs[i];
470  uint32_t size = avio_rb32(pb);
471  int64_t next = avio_tell(pb) + size - 4;
472 
473  if (size < 12)
474  return AVERROR_INVALIDDATA;
475 
476  dref->type = avio_rl32(pb);
477  avio_rb32(pb); // version + flags
478  av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
479 
480  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
481  /* macintosh alias record */
482  uint16_t volume_len, len;
483  int16_t type;
484 
485  avio_skip(pb, 10);
486 
487  volume_len = avio_r8(pb);
488  volume_len = FFMIN(volume_len, 27);
489  avio_read(pb, dref->volume, 27);
490  dref->volume[volume_len] = 0;
491  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
492 
493  avio_skip(pb, 12);
494 
495  len = avio_r8(pb);
496  len = FFMIN(len, 63);
497  avio_read(pb, dref->filename, 63);
498  dref->filename[len] = 0;
499  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
500 
501  avio_skip(pb, 16);
502 
503  /* read next level up_from_alias/down_to_target */
504  dref->nlvl_from = avio_rb16(pb);
505  dref->nlvl_to = avio_rb16(pb);
506  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
507  dref->nlvl_from, dref->nlvl_to);
508 
509  avio_skip(pb, 16);
510 
511  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
512  if(url_feof(pb))
513  return AVERROR_EOF;
514  type = avio_rb16(pb);
515  len = avio_rb16(pb);
516  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
517  if (len&1)
518  len += 1;
519  if (type == 2) { // absolute path
520  av_free(dref->path);
521  dref->path = av_mallocz(len+1);
522  if (!dref->path)
523  return AVERROR(ENOMEM);
524  avio_read(pb, dref->path, len);
525  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
526  len -= volume_len;
527  memmove(dref->path, dref->path+volume_len, len);
528  dref->path[len] = 0;
529  }
530  for (j = 0; j < len; j++)
531  if (dref->path[j] == ':')
532  dref->path[j] = '/';
533  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
534  } else if (type == 0) { // directory name
535  av_free(dref->dir);
536  dref->dir = av_malloc(len+1);
537  if (!dref->dir)
538  return AVERROR(ENOMEM);
539  avio_read(pb, dref->dir, len);
540  dref->dir[len] = 0;
541  for (j = 0; j < len; j++)
542  if (dref->dir[j] == ':')
543  dref->dir[j] = '/';
544  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
545  } else
546  avio_skip(pb, len);
547  }
548  }
549  avio_seek(pb, next, SEEK_SET);
550  }
551  return 0;
552 }
553 
554 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
555 {
556  AVStream *st;
557  uint32_t type;
558  uint32_t av_unused ctype;
559  int title_size;
560  char *title_str;
561 
562  if (c->fc->nb_streams < 1) // meta before first trak
563  return 0;
564 
565  st = c->fc->streams[c->fc->nb_streams-1];
566 
567  avio_r8(pb); /* version */
568  avio_rb24(pb); /* flags */
569 
570  /* component type */
571  ctype = avio_rl32(pb);
572  type = avio_rl32(pb); /* component subtype */
573 
574  av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
575  av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
576 
577  if (type == MKTAG('v','i','d','e'))
578  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
579  else if (type == MKTAG('s','o','u','n'))
580  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
581  else if (type == MKTAG('m','1','a',' '))
582  st->codec->codec_id = AV_CODEC_ID_MP2;
583  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
584  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
585 
586  avio_rb32(pb); /* component manufacture */
587  avio_rb32(pb); /* component flags */
588  avio_rb32(pb); /* component flags mask */
589 
590  title_size = atom.size - 24;
591  if (title_size > 0) {
592  title_str = av_malloc(title_size + 1); /* Add null terminator */
593  if (!title_str)
594  return AVERROR(ENOMEM);
595  avio_read(pb, title_str, title_size);
596  title_str[title_size] = 0;
597  if (title_str[0])
598  av_dict_set(&st->metadata, "handler_name", title_str +
599  (!c->isom && title_str[0] == title_size - 1), 0);
600  av_freep(&title_str);
601  }
602 
603  return 0;
604 }
605 
606 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
607 {
608  AVStream *st;
609  int tag;
610 
611  if (fc->nb_streams < 1)
612  return 0;
613  st = fc->streams[fc->nb_streams-1];
614 
615  avio_rb32(pb); /* version + flags */
616  ff_mp4_read_descr(fc, pb, &tag);
617  if (tag == MP4ESDescrTag) {
618  ff_mp4_parse_es_descr(pb, NULL);
619  } else
620  avio_rb16(pb); /* ID */
621 
622  ff_mp4_read_descr(fc, pb, &tag);
623  if (tag == MP4DecConfigDescrTag)
624  ff_mp4_read_dec_config_descr(fc, st, pb);
625  return 0;
626 }
627 
628 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
629 {
630  return ff_mov_read_esds(c->fc, pb, atom);
631 }
632 
633 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
634 {
635  AVStream *st;
636  int ac3info, acmod, lfeon, bsmod;
637 
638  if (c->fc->nb_streams < 1)
639  return 0;
640  st = c->fc->streams[c->fc->nb_streams-1];
641 
642  ac3info = avio_rb24(pb);
643  bsmod = (ac3info >> 14) & 0x7;
644  acmod = (ac3info >> 11) & 0x7;
645  lfeon = (ac3info >> 10) & 0x1;
646  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
647  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
648  if (lfeon)
649  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
650  st->codec->audio_service_type = bsmod;
651  if (st->codec->channels > 1 && bsmod == 0x7)
652  st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
653 
654  return 0;
655 }
656 
657 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
658 {
659  AVStream *st;
660  int eac3info, acmod, lfeon, bsmod;
661 
662  if (c->fc->nb_streams < 1)
663  return 0;
664  st = c->fc->streams[c->fc->nb_streams-1];
665 
666  /* No need to parse fields for additional independent substreams and its
667  * associated dependent substreams since libavcodec's E-AC-3 decoder
668  * does not support them yet. */
669  avio_rb16(pb); /* data_rate and num_ind_sub */
670  eac3info = avio_rb24(pb);
671  bsmod = (eac3info >> 12) & 0x1f;
672  acmod = (eac3info >> 9) & 0x7;
673  lfeon = (eac3info >> 8) & 0x1;
674  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
675  if (lfeon)
676  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
677  st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
678  st->codec->audio_service_type = bsmod;
679  if (st->codec->channels > 1 && bsmod == 0x7)
680  st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
681 
682  return 0;
683 }
684 
685 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
686 {
687  AVStream *st;
688 
689  if (c->fc->nb_streams < 1)
690  return 0;
691  st = c->fc->streams[c->fc->nb_streams-1];
692 
693  if (atom.size < 16)
694  return 0;
695 
696  /* skip version and flags */
697  avio_skip(pb, 4);
698 
699  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
700 
701  return 0;
702 }
703 
704 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
705 {
706  AVStream *st;
707 
708  if (c->fc->nb_streams < 1)
709  return 0;
710  st = c->fc->streams[c->fc->nb_streams-1];
711 
712  if (ff_get_wav_header(pb, st->codec, atom.size) < 0) {
713  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
714  }
715 
716  return 0;
717 }
718 
719 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
720 {
721  const int num = avio_rb32(pb);
722  const int den = avio_rb32(pb);
723  AVStream *st;
724 
725  if (c->fc->nb_streams < 1)
726  return 0;
727  st = c->fc->streams[c->fc->nb_streams-1];
728 
729  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
730  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
731  av_log(c->fc, AV_LOG_WARNING,
732  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
733  st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
734  num, den);
735  } else if (den != 0) {
736  st->sample_aspect_ratio.num = num;
737  st->sample_aspect_ratio.den = den;
738  }
739  return 0;
740 }
741 
742 /* this atom contains actual media data */
743 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
744 {
745  if (atom.size == 0) /* wrong one (MP4) */
746  return 0;
747  c->found_mdat=1;
748  return 0; /* now go for moov */
749 }
750 
751 /* read major brand, minor version and compatible brands and store them as metadata */
752 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
753 {
754  uint32_t minor_ver;
755  int comp_brand_size;
756  char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
757  char* comp_brands_str;
758  uint8_t type[5] = {0};
759 
760  avio_read(pb, type, 4);
761  if (strcmp(type, "qt "))
762  c->isom = 1;
763  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
764  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
765  minor_ver = avio_rb32(pb); /* minor version */
766  snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
767  av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
768 
769  comp_brand_size = atom.size - 8;
770  if (comp_brand_size < 0)
771  return AVERROR_INVALIDDATA;
772  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
773  if (!comp_brands_str)
774  return AVERROR(ENOMEM);
775  avio_read(pb, comp_brands_str, comp_brand_size);
776  comp_brands_str[comp_brand_size] = 0;
777  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
778  av_freep(&comp_brands_str);
779 
780  return 0;
781 }
782 
783 /* this atom should contain all header atoms */
784 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
785 {
786  int ret;
787 
788  if ((ret = mov_read_default(c, pb, atom)) < 0)
789  return ret;
790  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
791  /* so we don't parse the whole file if over a network */
792  c->found_moov=1;
793  return 0; /* now go for mdat */
794 }
795 
796 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
797 {
798  c->fragment.moof_offset = avio_tell(pb) - 8;
799  av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
800  return mov_read_default(c, pb, atom);
801 }
802 
803 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
804 {
805  char buffer[32];
806  if (time) {
807  struct tm *ptm;
808  time_t timet;
809  if(time >= 2082844800)
810  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
811  timet = time;
812  ptm = gmtime(&timet);
813  if (!ptm) return;
814  strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
815  av_dict_set(metadata, "creation_time", buffer, 0);
816  }
817 }
818 
819 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
820 {
821  AVStream *st;
822  MOVStreamContext *sc;
823  int version;
824  char language[4] = {0};
825  unsigned lang;
826  int64_t creation_time;
827 
828  if (c->fc->nb_streams < 1)
829  return 0;
830  st = c->fc->streams[c->fc->nb_streams-1];
831  sc = st->priv_data;
832 
833  version = avio_r8(pb);
834  if (version > 1) {
835  avpriv_request_sample(c->fc, "Version %d", version);
836  return AVERROR_PATCHWELCOME;
837  }
838  avio_rb24(pb); /* flags */
839  if (version == 1) {
840  creation_time = avio_rb64(pb);
841  avio_rb64(pb);
842  } else {
843  creation_time = avio_rb32(pb);
844  avio_rb32(pb); /* modification time */
845  }
846  mov_metadata_creation_time(&st->metadata, creation_time);
847 
848  sc->time_scale = avio_rb32(pb);
849  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
850 
851  lang = avio_rb16(pb); /* language */
852  if (ff_mov_lang_to_iso639(lang, language))
853  av_dict_set(&st->metadata, "language", language, 0);
854  avio_rb16(pb); /* quality */
855 
856  return 0;
857 }
858 
859 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
860 {
861  int64_t creation_time;
862  int version = avio_r8(pb); /* version */
863  avio_rb24(pb); /* flags */
864 
865  if (version == 1) {
866  creation_time = avio_rb64(pb);
867  avio_rb64(pb);
868  } else {
869  creation_time = avio_rb32(pb);
870  avio_rb32(pb); /* modification time */
871  }
872  mov_metadata_creation_time(&c->fc->metadata, creation_time);
873  c->time_scale = avio_rb32(pb); /* time scale */
874 
875  av_dlog(c->fc, "time scale = %i\n", c->time_scale);
876 
877  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
878  // set the AVCodecContext duration because the duration of individual tracks
879  // may be inaccurate
880  if (c->time_scale > 0 && !c->trex_data)
881  c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
882  avio_rb32(pb); /* preferred scale */
883 
884  avio_rb16(pb); /* preferred volume */
885 
886  avio_skip(pb, 10); /* reserved */
887 
888  avio_skip(pb, 36); /* display matrix */
889 
890  avio_rb32(pb); /* preview time */
891  avio_rb32(pb); /* preview duration */
892  avio_rb32(pb); /* poster time */
893  avio_rb32(pb); /* selection time */
894  avio_rb32(pb); /* selection duration */
895  avio_rb32(pb); /* current time */
896  avio_rb32(pb); /* next track ID */
897  return 0;
898 }
899 
900 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
901 {
902  AVStream *st;
903  int little_endian;
904 
905  if (c->fc->nb_streams < 1)
906  return 0;
907  st = c->fc->streams[c->fc->nb_streams-1];
908 
909  little_endian = avio_rb16(pb) & 0xFF;
910  av_dlog(c->fc, "enda %d\n", little_endian);
911  if (little_endian == 1) {
912  switch (st->codec->codec_id) {
913  case AV_CODEC_ID_PCM_S24BE:
914  st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
915  break;
916  case AV_CODEC_ID_PCM_S32BE:
917  st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
918  break;
919  case AV_CODEC_ID_PCM_F32BE:
920  st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
921  break;
922  case AV_CODEC_ID_PCM_F64BE:
923  st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
924  break;
925  default:
926  break;
927  }
928  }
929  return 0;
930 }
931 
932 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
933 {
934  AVStream *st;
935  unsigned mov_field_order;
936  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
937 
938  if (c->fc->nb_streams < 1) // will happen with jp2 files
939  return 0;
940  st = c->fc->streams[c->fc->nb_streams-1];
941  if (atom.size < 2)
942  return AVERROR_INVALIDDATA;
943  mov_field_order = avio_rb16(pb);
944  if ((mov_field_order & 0xFF00) == 0x0100)
945  decoded_field_order = AV_FIELD_PROGRESSIVE;
946  else if ((mov_field_order & 0xFF00) == 0x0200) {
947  switch (mov_field_order & 0xFF) {
948  case 0x01: decoded_field_order = AV_FIELD_TT;
949  break;
950  case 0x06: decoded_field_order = AV_FIELD_BB;
951  break;
952  case 0x09: decoded_field_order = AV_FIELD_TB;
953  break;
954  case 0x0E: decoded_field_order = AV_FIELD_BT;
955  break;
956  }
957  }
958  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
959  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
960  }
961  st->codec->field_order = decoded_field_order;
962 
963  return 0;
964 }
965 
966 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
967 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
968  enum AVCodecID codec_id)
969 {
970  AVStream *st;
971  uint64_t size;
972  uint8_t *buf;
973 
974  if (c->fc->nb_streams < 1) // will happen with jp2 files
975  return 0;
976  st= c->fc->streams[c->fc->nb_streams-1];
977 
978  if (st->codec->codec_id != codec_id)
979  return 0; /* unexpected codec_id - don't mess with extradata */
980 
981  size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
982  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
983  return AVERROR_INVALIDDATA;
984  buf= av_realloc(st->codec->extradata, size);
985  if (!buf)
986  return AVERROR(ENOMEM);
987  st->codec->extradata= buf;
988  buf+= st->codec->extradata_size;
989  st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
990  AV_WB32( buf , atom.size + 8);
991  AV_WL32( buf + 4, atom.type);
992  avio_read(pb, buf + 8, atom.size);
993  return 0;
994 }
995 
996 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
997 static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
998 {
999  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1000 }
1001 
1002 static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1003 {
1004  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1005 }
1006 
1007 static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1008 {
1009  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1010 }
1011 
1012 static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1013 {
1014  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1015 }
1016 
1017 static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1018 {
1019  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1020  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1021  codec->codec_id == AV_CODEC_ID_H264 &&
1022  atom.size > 11) {
1023  avio_skip(pb, 10);
1024  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1025  if (avio_rb16(pb) == 0xd4d)
1026  codec->width = 1440;
1027  return 0;
1028  }
1029 
1030  return mov_read_avid(c, pb, atom);
1031 }
1032 
1033 static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1034 {
1035  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1036 }
1037 
1038 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1039 {
1040  AVStream *st;
1041 
1042  if (c->fc->nb_streams < 1)
1043  return 0;
1044  st = c->fc->streams[c->fc->nb_streams-1];
1045 
1046  if ((uint64_t)atom.size > (1<<30))
1047  return AVERROR_INVALIDDATA;
1048 
1049  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1050  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1051  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1052  // pass all frma atom to codec, needed at least for QDMC and QDM2
1053  av_free(st->codec->extradata);
1054  st->codec->extradata_size = 0;
1055  st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
1056  if (!st->codec->extradata)
1057  return AVERROR(ENOMEM);
1058  st->codec->extradata_size = atom.size;
1059  avio_read(pb, st->codec->extradata, atom.size);
1060  } else if (atom.size > 8) { /* to read frma, esds atoms */
1061  int ret;
1062  if ((ret = mov_read_default(c, pb, atom)) < 0)
1063  return ret;
1064  } else
1065  avio_skip(pb, atom.size);
1066  return 0;
1067 }
1068 
1069 /**
1070  * This function reads atom content and puts data in extradata without tag
1071  * nor size unlike mov_read_extradata.
1072  */
1073 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1074 {
1075  AVStream *st;
1076 
1077  if (c->fc->nb_streams < 1)
1078  return 0;
1079  st = c->fc->streams[c->fc->nb_streams-1];
1080 
1081  if ((uint64_t)atom.size > (1<<30))
1082  return AVERROR_INVALIDDATA;
1083 
1084  if (atom.size >= 10) {
1085  // Broken files created by legacy versions of libavformat will
1086  // wrap a whole fiel atom inside of a glbl atom.
1087  unsigned size = avio_rb32(pb);
1088  unsigned type = avio_rl32(pb);
1089  avio_seek(pb, -8, SEEK_CUR);
1090  if (type == MKTAG('f','i','e','l') && size == atom.size)
1091  return mov_read_default(c, pb, atom);
1092  }
1093  av_free(st->codec->extradata);
1094  st->codec->extradata_size = 0;
1095  st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
1096  if (!st->codec->extradata)
1097  return AVERROR(ENOMEM);
1098  st->codec->extradata_size = atom.size;
1099  avio_read(pb, st->codec->extradata, atom.size);
1100  return 0;
1101 }
1102 
1103 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1104 {
1105  AVStream *st;
1106  uint8_t profile_level;
1107 
1108  if (c->fc->nb_streams < 1)
1109  return 0;
1110  st = c->fc->streams[c->fc->nb_streams-1];
1111 
1112  if (atom.size >= (1<<28) || atom.size < 7)
1113  return AVERROR_INVALIDDATA;
1114 
1115  profile_level = avio_r8(pb);
1116  if ((profile_level & 0xf0) != 0xc0)
1117  return 0;
1118 
1119  av_free(st->codec->extradata);
1120  st->codec->extradata_size = 0;
1121  st->codec->extradata = av_mallocz(atom.size - 7 + FF_INPUT_BUFFER_PADDING_SIZE);
1122  if (!st->codec->extradata)
1123  return AVERROR(ENOMEM);
1124  st->codec->extradata_size = atom.size - 7;
1125  avio_seek(pb, 6, SEEK_CUR);
1126  avio_read(pb, st->codec->extradata, st->codec->extradata_size);
1127  return 0;
1128 }
1129 
1130 /**
1131  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1132  * but can have extradata appended at the end after the 40 bytes belonging
1133  * to the struct.
1134  */
1135 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1136 {
1137  AVStream *st;
1138 
1139  if (c->fc->nb_streams < 1)
1140  return 0;
1141  if (atom.size <= 40)
1142  return 0;
1143  st = c->fc->streams[c->fc->nb_streams-1];
1144 
1145  if ((uint64_t)atom.size > (1<<30))
1146  return AVERROR_INVALIDDATA;
1147 
1148  av_free(st->codec->extradata);
1149  st->codec->extradata_size = 0;
1150  st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
1151  if (!st->codec->extradata)
1152  return AVERROR(ENOMEM);
1153  st->codec->extradata_size = atom.size - 40;
1154  avio_skip(pb, 40);
1155  avio_read(pb, st->codec->extradata, atom.size - 40);
1156  return 0;
1157 }
1158 
1159 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1160 {
1161  AVStream *st;
1162  MOVStreamContext *sc;
1163  unsigned int i, entries;
1164 
1165  if (c->fc->nb_streams < 1)
1166  return 0;
1167  st = c->fc->streams[c->fc->nb_streams-1];
1168  sc = st->priv_data;
1169 
1170  avio_r8(pb); /* version */
1171  avio_rb24(pb); /* flags */
1172 
1173  entries = avio_rb32(pb);
1174 
1175  if (!entries)
1176  return 0;
1177  if (entries >= UINT_MAX/sizeof(int64_t))
1178  return AVERROR_INVALIDDATA;
1179 
1180  sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1181  if (!sc->chunk_offsets)
1182  return AVERROR(ENOMEM);
1183  sc->chunk_count = entries;
1184 
1185  if (atom.type == MKTAG('s','t','c','o'))
1186  for (i = 0; i < entries && !pb->eof_reached; i++)
1187  sc->chunk_offsets[i] = avio_rb32(pb);
1188  else if (atom.type == MKTAG('c','o','6','4'))
1189  for (i = 0; i < entries && !pb->eof_reached; i++)
1190  sc->chunk_offsets[i] = avio_rb64(pb);
1191  else
1192  return AVERROR_INVALIDDATA;
1193 
1194  sc->chunk_count = i;
1195 
1196  if (pb->eof_reached)
1197  return AVERROR_EOF;
1198 
1199  return 0;
1200 }
1201 
1202 /**
1203  * Compute codec id for 'lpcm' tag.
1204  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1205  */
1206 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1207 {
1208  /* lpcm flags:
1209  * 0x1 = float
1210  * 0x2 = big-endian
1211  * 0x4 = signed
1212  */
1213  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1214 }
1215 
1216 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1217 {
1218  AVStream *st;
1219  MOVStreamContext *sc;
1220  int j, pseudo_stream_id;
1221 
1222  if (c->fc->nb_streams < 1)
1223  return 0;
1224  st = c->fc->streams[c->fc->nb_streams-1];
1225  sc = st->priv_data;
1226 
1227  for (pseudo_stream_id = 0;
1228  pseudo_stream_id < entries && !pb->eof_reached;
1229  pseudo_stream_id++) {
1230  //Parsing Sample description table
1231  enum AVCodecID id;
1232  int dref_id = 1;
1233  MOVAtom a = { AV_RL32("stsd") };
1234  int64_t start_pos = avio_tell(pb);
1235  int64_t size = avio_rb32(pb); /* size */
1236  uint32_t format = avio_rl32(pb); /* data format */
1237 
1238  if (size >= 16) {
1239  avio_rb32(pb); /* reserved */
1240  avio_rb16(pb); /* reserved */
1241  dref_id = avio_rb16(pb);
1242  }else if (size <= 7){
1243  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1244  return AVERROR_INVALIDDATA;
1245  }
1246 
1247  if (st->codec->codec_tag &&
1248  st->codec->codec_tag != format &&
1249  (c->fc->video_codec_id ? ff_codec_get_id(ff_codec_movvideo_tags, format) != c->fc->video_codec_id
1250  : st->codec->codec_tag != MKTAG('j','p','e','g'))
1251  ){
1252  /* Multiple fourcc, we skip JPEG. This is not correct, we should
1253  * export it as a separate AVStream but this needs a few changes
1254  * in the MOV demuxer, patch welcome. */
1255  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1256  avio_skip(pb, size - (avio_tell(pb) - start_pos));
1257  continue;
1258  }
1259  /* we cannot demux concatenated h264 streams because of different extradata */
1260  if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1"))
1261  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 might not play corrently.\n");
1262  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1263  sc->dref_id= dref_id;
1264 
1265  st->codec->codec_tag = format;
1266  id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1267  if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
1268  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF);
1269 
1270  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1271  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1272  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
1273  format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
1274  id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1275  if (id <= 0)
1276  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1277  if (id > 0)
1278  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1279  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1280  (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1281  st->codec->codec_id == AV_CODEC_ID_NONE)){
1282  id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1283  if (id > 0)
1284  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1285  }
1286  }
1287 
1288  av_dlog(c->fc, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1289  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1290  (format >> 24) & 0xff, st->codec->codec_type);
1291 
1292  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1293  unsigned int color_depth, len;
1294  int color_greyscale;
1295  int color_table_id;
1296 
1297  st->codec->codec_id = id;
1298  avio_rb16(pb); /* version */
1299  avio_rb16(pb); /* revision level */
1300  avio_rb32(pb); /* vendor */
1301  avio_rb32(pb); /* temporal quality */
1302  avio_rb32(pb); /* spatial quality */
1303 
1304  st->codec->width = avio_rb16(pb); /* width */
1305  st->codec->height = avio_rb16(pb); /* height */
1306 
1307  avio_rb32(pb); /* horiz resolution */
1308  avio_rb32(pb); /* vert resolution */
1309  avio_rb32(pb); /* data size, always 0 */
1310  avio_rb16(pb); /* frames per samples */
1311 
1312  len = avio_r8(pb); /* codec name, pascal string */
1313  if (len > 31)
1314  len = 31;
1315  mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1316  if (len < 31)
1317  avio_skip(pb, 31 - len);
1318  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1319  if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)){
1320  st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1321  st->codec->width &= ~1;
1322  st->codec->height &= ~1;
1323  }
1324  /* Flash Media Server uses tag H263 with Sorenson Spark */
1325  if (format == MKTAG('H','2','6','3') &&
1326  !memcmp(st->codec->codec_name, "Sorenson H263", 13))
1327  st->codec->codec_id = AV_CODEC_ID_FLV1;
1328 
1329  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1330  color_table_id = avio_rb16(pb); /* colortable id */
1331  av_dlog(c->fc, "depth %d, ctab id %d\n",
1332  st->codec->bits_per_coded_sample, color_table_id);
1333  /* figure out the palette situation */
1334  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1335  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1336 
1337  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1338  if ((color_depth == 2) || (color_depth == 4) ||
1339  (color_depth == 8)) {
1340  /* for palette traversal */
1341  unsigned int color_start, color_count, color_end;
1342  unsigned char a, r, g, b;
1343 
1344  if (color_greyscale) {
1345  int color_index, color_dec;
1346  /* compute the greyscale palette */
1347  st->codec->bits_per_coded_sample = color_depth;
1348  color_count = 1 << color_depth;
1349  color_index = 255;
1350  color_dec = 256 / (color_count - 1);
1351  for (j = 0; j < color_count; j++) {
1352  if (id == AV_CODEC_ID_CINEPAK){
1353  r = g = b = color_count - 1 - color_index;
1354  }else
1355  r = g = b = color_index;
1356  sc->palette[j] =
1357  (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1358  color_index -= color_dec;
1359  if (color_index < 0)
1360  color_index = 0;
1361  }
1362  } else if (color_table_id) {
1363  const uint8_t *color_table;
1364  /* if flag bit 3 is set, use the default palette */
1365  color_count = 1 << color_depth;
1366  if (color_depth == 2)
1367  color_table = ff_qt_default_palette_4;
1368  else if (color_depth == 4)
1369  color_table = ff_qt_default_palette_16;
1370  else
1371  color_table = ff_qt_default_palette_256;
1372 
1373  for (j = 0; j < color_count; j++) {
1374  r = color_table[j * 3 + 0];
1375  g = color_table[j * 3 + 1];
1376  b = color_table[j * 3 + 2];
1377  sc->palette[j] =
1378  (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1379  }
1380  } else {
1381  /* load the palette from the file */
1382  color_start = avio_rb32(pb);
1383  color_count = avio_rb16(pb);
1384  color_end = avio_rb16(pb);
1385  if ((color_start <= 255) &&
1386  (color_end <= 255)) {
1387  for (j = color_start; j <= color_end; j++) {
1388  /* each A, R, G, or B component is 16 bits;
1389  * only use the top 8 bits */
1390  a = avio_r8(pb);
1391  avio_r8(pb);
1392  r = avio_r8(pb);
1393  avio_r8(pb);
1394  g = avio_r8(pb);
1395  avio_r8(pb);
1396  b = avio_r8(pb);
1397  avio_r8(pb);
1398  sc->palette[j] =
1399  (a << 24 ) | (r << 16) | (g << 8) | (b);
1400  }
1401  }
1402  }
1403  sc->has_palette = 1;
1404  }
1405  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1406  int bits_per_sample, flags;
1407  uint16_t version = avio_rb16(pb);
1408  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1409 
1410  st->codec->codec_id = id;
1411  avio_rb16(pb); /* revision level */
1412  avio_rb32(pb); /* vendor */
1413 
1414  st->codec->channels = avio_rb16(pb); /* channel count */
1415  av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1416  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1417 
1418  sc->audio_cid = avio_rb16(pb);
1419  avio_rb16(pb); /* packet size = 0 */
1420 
1421  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1422 
1423  //Read QT version 1 fields. In version 0 these do not exist.
1424  av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom);
1425  if (!c->isom ||
1426  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1427  if (version==1) {
1428  sc->samples_per_frame = avio_rb32(pb);
1429  avio_rb32(pb); /* bytes per packet */
1430  sc->bytes_per_frame = avio_rb32(pb);
1431  avio_rb32(pb); /* bytes per sample */
1432  } else if (version==2) {
1433  avio_rb32(pb); /* sizeof struct only */
1434  st->codec->sample_rate = av_int2double(avio_rb64(pb)); /* float 64 */
1435  st->codec->channels = avio_rb32(pb);
1436  avio_rb32(pb); /* always 0x7F000000 */
1437  st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
1438  flags = avio_rb32(pb); /* lpcm format specific flag */
1439  sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */
1440  sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */
1441  if (format == MKTAG('l','p','c','m'))
1442  st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1443  }
1444  }
1445 
1446  switch (st->codec->codec_id) {
1447  case AV_CODEC_ID_PCM_S8:
1448  case AV_CODEC_ID_PCM_U8:
1449  if (st->codec->bits_per_coded_sample == 16)
1450  st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1451  break;
1452  case AV_CODEC_ID_PCM_S16LE:
1453  case AV_CODEC_ID_PCM_S16BE:
1454  if (st->codec->bits_per_coded_sample == 8)
1455  st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1456  else if (st->codec->bits_per_coded_sample == 24)
1457  st->codec->codec_id =
1458  st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1459  AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1460  break;
1461  /* set values for old format before stsd version 1 appeared */
1462  case AV_CODEC_ID_MACE3:
1463  sc->samples_per_frame = 6;
1464  sc->bytes_per_frame = 2*st->codec->channels;
1465  break;
1466  case AV_CODEC_ID_MACE6:
1467  sc->samples_per_frame = 6;
1468  sc->bytes_per_frame = 1*st->codec->channels;
1469  break;
1470  case AV_CODEC_ID_ADPCM_IMA_QT:
1471  sc->samples_per_frame = 64;
1472  sc->bytes_per_frame = 34*st->codec->channels;
1473  break;
1474  case AV_CODEC_ID_GSM:
1475  sc->samples_per_frame = 160;
1476  sc->bytes_per_frame = 33;
1477  break;
1478  default:
1479  break;
1480  }
1481 
1482  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1483  if (bits_per_sample) {
1484  st->codec->bits_per_coded_sample = bits_per_sample;
1485  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1486  }
1487  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1488  // ttxt stsd contains display flags, justification, background
1489  // color, fonts, and default styles, so fake an atom to read it
1490  MOVAtom fake_atom = { .size = size - (avio_tell(pb) - start_pos) };
1491  if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1492  mov_read_glbl(c, pb, fake_atom);
1493  st->codec->codec_id= id;
1494  st->codec->width = sc->width;
1495  st->codec->height = sc->height;
1496  } else {
1497  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1498  MOVStreamContext *tmcd_ctx = st->priv_data;
1499  int val;
1500  avio_rb32(pb); /* reserved */
1501  val = avio_rb32(pb); /* flags */
1502  tmcd_ctx->tmcd_flags = val;
1503  if (val & 1)
1504  st->codec->flags2 |= CODEC_FLAG2_DROP_FRAME_TIMECODE;
1505  avio_rb32(pb); /* time scale */
1506  avio_rb32(pb); /* frame duration */
1507  st->codec->time_base.den = avio_r8(pb); /* number of frame */
1508  st->codec->time_base.num = 1;
1509  }
1510  /* other codec type, just skip (rtp, mp4s, ...) */
1511  avio_skip(pb, size - (avio_tell(pb) - start_pos));
1512  }
1513  /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1514  a.size = size - (avio_tell(pb) - start_pos);
1515  if (a.size > 8) {
1516  int ret;
1517  if ((ret = mov_read_default(c, pb, a)) < 0)
1518  return ret;
1519  } else if (a.size > 0)
1520  avio_skip(pb, a.size);
1521  }
1522 
1523  if (pb->eof_reached)
1524  return AVERROR_EOF;
1525 
1526  if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1527  st->codec->sample_rate= sc->time_scale;
1528 
1529  /* special codec parameters handling */
1530  switch (st->codec->codec_id) {
1531 #if CONFIG_DV_DEMUXER
1532  case AV_CODEC_ID_DVAUDIO:
1533  c->dv_fctx = avformat_alloc_context();
1534  c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1535  if (!c->dv_demux) {
1536  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1537  return AVERROR(ENOMEM);
1538  }
1539  sc->dv_audio_container = 1;
1540  st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1541  break;
1542 #endif
1543  /* no ifdef since parameters are always those */
1544  case AV_CODEC_ID_QCELP:
1545  // force sample rate for qcelp when not stored in mov
1546  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1547  st->codec->sample_rate = 8000;
1548  st->codec->channels= 1; /* really needed */
1549  break;
1550  case AV_CODEC_ID_AMR_NB:
1551  st->codec->channels= 1; /* really needed */
1552  /* force sample rate for amr, stsd in 3gp does not store sample rate */
1553  st->codec->sample_rate = 8000;
1554  break;
1555  case AV_CODEC_ID_AMR_WB:
1556  st->codec->channels = 1;
1557  st->codec->sample_rate = 16000;
1558  break;
1559  case AV_CODEC_ID_MP2:
1560  case AV_CODEC_ID_MP3:
1561  st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1562  st->need_parsing = AVSTREAM_PARSE_FULL;
1563  break;
1564  case AV_CODEC_ID_GSM:
1565  case AV_CODEC_ID_ADPCM_MS:
1566  case AV_CODEC_ID_ADPCM_IMA_WAV:
1567  case AV_CODEC_ID_ILBC:
1568  case AV_CODEC_ID_MACE3:
1569  case AV_CODEC_ID_MACE6:
1570  case AV_CODEC_ID_QDM2:
1571  st->codec->block_align = sc->bytes_per_frame;
1572  break;
1573  case AV_CODEC_ID_ALAC:
1574  if (st->codec->extradata_size == 36) {
1575  st->codec->channels = AV_RB8 (st->codec->extradata+21);
1576  st->codec->sample_rate = AV_RB32(st->codec->extradata+32);
1577  }
1578  break;
1579  case AV_CODEC_ID_AC3:
1580  st->need_parsing = AVSTREAM_PARSE_FULL;
1581  break;
1582  case AV_CODEC_ID_MPEG1VIDEO:
1583  st->need_parsing = AVSTREAM_PARSE_FULL;
1584  break;
1585  case AV_CODEC_ID_VC1:
1586  st->need_parsing = AVSTREAM_PARSE_FULL;
1587  break;
1588  default:
1589  break;
1590  }
1591 
1592  return 0;
1593 }
1594 
1595 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1596 {
1597  int entries;
1598 
1599  avio_r8(pb); /* version */
1600  avio_rb24(pb); /* flags */
1601  entries = avio_rb32(pb);
1602 
1603  return ff_mov_read_stsd_entries(c, pb, entries);
1604 }
1605 
1606 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1607 {
1608  AVStream *st;
1609  MOVStreamContext *sc;
1610  unsigned int i, entries;
1611 
1612  if (c->fc->nb_streams < 1)
1613  return 0;
1614  st = c->fc->streams[c->fc->nb_streams-1];
1615  sc = st->priv_data;
1616 
1617  avio_r8(pb); /* version */
1618  avio_rb24(pb); /* flags */
1619 
1620  entries = avio_rb32(pb);
1621 
1622  av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1623 
1624  if (!entries)
1625  return 0;
1626  if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1627  return AVERROR_INVALIDDATA;
1628  sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1629  if (!sc->stsc_data)
1630  return AVERROR(ENOMEM);
1631 
1632  for (i = 0; i < entries && !pb->eof_reached; i++) {
1633  sc->stsc_data[i].first = avio_rb32(pb);
1634  sc->stsc_data[i].count = avio_rb32(pb);
1635  sc->stsc_data[i].id = avio_rb32(pb);
1636  }
1637 
1638  sc->stsc_count = i;
1639 
1640  if (pb->eof_reached)
1641  return AVERROR_EOF;
1642 
1643  return 0;
1644 }
1645 
1646 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1647 {
1648  AVStream *st;
1649  MOVStreamContext *sc;
1650  unsigned i, entries;
1651 
1652  if (c->fc->nb_streams < 1)
1653  return 0;
1654  st = c->fc->streams[c->fc->nb_streams-1];
1655  sc = st->priv_data;
1656 
1657  avio_rb32(pb); // version + flags
1658 
1659  entries = avio_rb32(pb);
1660  if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1661  return AVERROR_INVALIDDATA;
1662  sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1663  if (!sc->stps_data)
1664  return AVERROR(ENOMEM);
1665 
1666  for (i = 0; i < entries && !pb->eof_reached; i++) {
1667  sc->stps_data[i] = avio_rb32(pb);
1668  //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1669  }
1670 
1671  sc->stps_count = i;
1672 
1673  if (pb->eof_reached)
1674  return AVERROR_EOF;
1675 
1676  return 0;
1677 }
1678 
1679 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1680 {
1681  AVStream *st;
1682  MOVStreamContext *sc;
1683  unsigned int i, entries;
1684 
1685  if (c->fc->nb_streams < 1)
1686  return 0;
1687  st = c->fc->streams[c->fc->nb_streams-1];
1688  sc = st->priv_data;
1689 
1690  avio_r8(pb); /* version */
1691  avio_rb24(pb); /* flags */
1692 
1693  entries = avio_rb32(pb);
1694 
1695  av_dlog(c->fc, "keyframe_count = %d\n", entries);
1696 
1697  if (!entries)
1698  {
1699  sc->keyframe_absent = 1;
1700  return 0;
1701  }
1702  if (entries >= UINT_MAX / sizeof(int))
1703  return AVERROR_INVALIDDATA;
1704  sc->keyframes = av_malloc(entries * sizeof(int));
1705  if (!sc->keyframes)
1706  return AVERROR(ENOMEM);
1707 
1708  for (i = 0; i < entries && !pb->eof_reached; i++) {
1709  sc->keyframes[i] = avio_rb32(pb);
1710  //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1711  }
1712 
1713  sc->keyframe_count = i;
1714 
1715  if (pb->eof_reached)
1716  return AVERROR_EOF;
1717 
1718  return 0;
1719 }
1720 
1721 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1722 {
1723  AVStream *st;
1724  MOVStreamContext *sc;
1725  unsigned int i, entries, sample_size, field_size, num_bytes;
1726  GetBitContext gb;
1727  unsigned char* buf;
1728 
1729  if (c->fc->nb_streams < 1)
1730  return 0;
1731  st = c->fc->streams[c->fc->nb_streams-1];
1732  sc = st->priv_data;
1733 
1734  avio_r8(pb); /* version */
1735  avio_rb24(pb); /* flags */
1736 
1737  if (atom.type == MKTAG('s','t','s','z')) {
1738  sample_size = avio_rb32(pb);
1739  if (!sc->sample_size) /* do not overwrite value computed in stsd */
1740  sc->sample_size = sample_size;
1741  sc->stsz_sample_size = sample_size;
1742  field_size = 32;
1743  } else {
1744  sample_size = 0;
1745  avio_rb24(pb); /* reserved */
1746  field_size = avio_r8(pb);
1747  }
1748  entries = avio_rb32(pb);
1749 
1750  av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1751 
1752  sc->sample_count = entries;
1753  if (sample_size)
1754  return 0;
1755 
1756  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1757  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1758  return AVERROR_INVALIDDATA;
1759  }
1760 
1761  if (!entries)
1762  return 0;
1763  if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1764  return AVERROR_INVALIDDATA;
1765  sc->sample_sizes = av_malloc(entries * sizeof(int));
1766  if (!sc->sample_sizes)
1767  return AVERROR(ENOMEM);
1768 
1769  num_bytes = (entries*field_size+4)>>3;
1770 
1771  buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1772  if (!buf) {
1773  av_freep(&sc->sample_sizes);
1774  return AVERROR(ENOMEM);
1775  }
1776 
1777  if (avio_read(pb, buf, num_bytes) < num_bytes) {
1778  av_freep(&sc->sample_sizes);
1779  av_free(buf);
1780  return AVERROR_INVALIDDATA;
1781  }
1782 
1783  init_get_bits(&gb, buf, 8*num_bytes);
1784 
1785  for (i = 0; i < entries && !pb->eof_reached; i++) {
1786  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1787  sc->data_size += sc->sample_sizes[i];
1788  }
1789 
1790  sc->sample_count = i;
1791 
1792  if (pb->eof_reached)
1793  return AVERROR_EOF;
1794 
1795  av_free(buf);
1796  return 0;
1797 }
1798 
1799 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1800 {
1801  AVStream *st;
1802  MOVStreamContext *sc;
1803  unsigned int i, entries;
1804  int64_t duration=0;
1805  int64_t total_sample_count=0;
1806 
1807  if (c->fc->nb_streams < 1)
1808  return 0;
1809  st = c->fc->streams[c->fc->nb_streams-1];
1810  sc = st->priv_data;
1811 
1812  avio_r8(pb); /* version */
1813  avio_rb24(pb); /* flags */
1814  entries = avio_rb32(pb);
1815 
1816  av_dlog(c->fc, "track[%i].stts.entries = %i\n",
1817  c->fc->nb_streams-1, entries);
1818 
1819  if (entries >= UINT_MAX / sizeof(*sc->stts_data))
1820  return -1;
1821 
1822  sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1823  if (!sc->stts_data)
1824  return AVERROR(ENOMEM);
1825 
1826  for (i = 0; i < entries && !pb->eof_reached; i++) {
1827  int sample_duration;
1828  int sample_count;
1829 
1830  sample_count=avio_rb32(pb);
1831  sample_duration = avio_rb32(pb);
1832  /* sample_duration < 0 is invalid based on the spec */
1833  if (sample_duration < 0) {
1834  av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta in STTS %d\n", sample_duration);
1835  sample_duration = 1;
1836  }
1837  sc->stts_data[i].count= sample_count;
1838  sc->stts_data[i].duration= sample_duration;
1839 
1840  av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
1841  sample_count, sample_duration);
1842 
1843  duration+=(int64_t)sample_duration*sample_count;
1844  total_sample_count+=sample_count;
1845  }
1846 
1847  sc->stts_count = i;
1848 
1849  if (pb->eof_reached)
1850  return AVERROR_EOF;
1851 
1852  st->nb_frames= total_sample_count;
1853  if (duration)
1854  st->duration= duration;
1855  sc->track_end = duration;
1856  return 0;
1857 }
1858 
1859 static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
1860 {
1861  if (duration < 0) {
1862  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1863  }
1864 }
1865 
1866 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1867 {
1868  AVStream *st;
1869  MOVStreamContext *sc;
1870  unsigned int i, entries;
1871 
1872  if (c->fc->nb_streams < 1)
1873  return 0;
1874  st = c->fc->streams[c->fc->nb_streams-1];
1875  sc = st->priv_data;
1876 
1877  avio_r8(pb); /* version */
1878  avio_rb24(pb); /* flags */
1879  entries = avio_rb32(pb);
1880 
1881  av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1882 
1883  if (!entries)
1884  return 0;
1885  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
1886  return AVERROR_INVALIDDATA;
1887  sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1888  if (!sc->ctts_data)
1889  return AVERROR(ENOMEM);
1890 
1891  for (i = 0; i < entries && !pb->eof_reached; i++) {
1892  int count =avio_rb32(pb);
1893  int duration =avio_rb32(pb);
1894 
1895  sc->ctts_data[i].count = count;
1896  sc->ctts_data[i].duration= duration;
1897 
1898  av_dlog(c->fc, "count=%d, duration=%d\n",
1899  count, duration);
1900 
1901  if (FFABS(duration) > (1<<28) && i+2<entries) {
1902  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
1903  av_freep(&sc->ctts_data);
1904  sc->ctts_count = 0;
1905  return 0;
1906  }
1907 
1908  if (i+2<entries)
1909  mov_update_dts_shift(sc, duration);
1910  }
1911 
1912  sc->ctts_count = i;
1913 
1914  if (pb->eof_reached)
1915  return AVERROR_EOF;
1916 
1917  av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
1918 
1919  return 0;
1920 }
1921 
1922 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1923 {
1924  AVStream *st;
1925  MOVStreamContext *sc;
1926  unsigned int i, entries;
1927  uint8_t version;
1928  uint32_t grouping_type;
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  version = avio_r8(pb); /* version */
1936  avio_rb24(pb); /* flags */
1937  grouping_type = avio_rl32(pb);
1938  if (grouping_type != MKTAG( 'r','a','p',' '))
1939  return 0; /* only support 'rap ' grouping */
1940  if (version == 1)
1941  avio_rb32(pb); /* grouping_type_parameter */
1942 
1943  entries = avio_rb32(pb);
1944  if (!entries)
1945  return 0;
1946  if (entries >= UINT_MAX / sizeof(*sc->rap_group))
1947  return AVERROR_INVALIDDATA;
1948  sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
1949  if (!sc->rap_group)
1950  return AVERROR(ENOMEM);
1951 
1952  for (i = 0; i < entries && !pb->eof_reached; i++) {
1953  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
1954  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
1955  }
1956 
1957  sc->rap_group_count = i;
1958 
1959  return pb->eof_reached ? AVERROR_EOF : 0;
1960 }
1961 
1962 static void mov_build_index(MOVContext *mov, AVStream *st)
1963 {
1964  MOVStreamContext *sc = st->priv_data;
1965  int64_t current_offset;
1966  int64_t current_dts = 0;
1967  unsigned int stts_index = 0;
1968  unsigned int stsc_index = 0;
1969  unsigned int stss_index = 0;
1970  unsigned int stps_index = 0;
1971  unsigned int i, j;
1972  uint64_t stream_size = 0;
1973  AVIndexEntry *mem;
1974 
1975  /* adjust first dts according to edit list */
1976  if ((sc->empty_duration || sc->start_time) && mov->time_scale > 0) {
1977  if (sc->empty_duration)
1978  sc->empty_duration = av_rescale(sc->empty_duration, sc->time_scale, mov->time_scale);
1979  sc->time_offset = sc->start_time - sc->empty_duration;
1980  current_dts = -sc->time_offset;
1981  if (sc->ctts_count>0 && sc->stts_count>0 &&
1982  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
1983  /* more than 16 frames delay, dts are likely wrong
1984  this happens with files created by iMovie */
1985  sc->wrong_dts = 1;
1986  st->codec->has_b_frames = 1;
1987  }
1988  }
1989 
1990  /* only use old uncompressed audio chunk demuxing when stts specifies it */
1991  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1992  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1993  unsigned int current_sample = 0;
1994  unsigned int stts_sample = 0;
1995  unsigned int sample_size;
1996  unsigned int distance = 0;
1997  unsigned int rap_group_index = 0;
1998  unsigned int rap_group_sample = 0;
1999  int rap_group_present = sc->rap_group_count && sc->rap_group;
2000  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2001 
2002  current_dts -= sc->dts_shift;
2003 
2004  if (!sc->sample_count || st->nb_index_entries)
2005  return;
2006  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2007  return;
2008  mem = av_realloc(st->index_entries, (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries));
2009  if (!mem)
2010  return;
2011  st->index_entries = mem;
2012  st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
2013 
2014  for (i = 0; i < sc->chunk_count; i++) {
2015  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2016  current_offset = sc->chunk_offsets[i];
2017  while (stsc_index + 1 < sc->stsc_count &&
2018  i + 1 == sc->stsc_data[stsc_index + 1].first)
2019  stsc_index++;
2020 
2021  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2022  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2023  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2024  sc->stsz_sample_size = sc->sample_size;
2025  }
2026  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2027  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2028  sc->stsz_sample_size = sc->sample_size;
2029  }
2030 
2031  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2032  int keyframe = 0;
2033  if (current_sample >= sc->sample_count) {
2034  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2035  return;
2036  }
2037 
2038  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2039  keyframe = 1;
2040  if (stss_index + 1 < sc->keyframe_count)
2041  stss_index++;
2042  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2043  keyframe = 1;
2044  if (stps_index + 1 < sc->stps_count)
2045  stps_index++;
2046  }
2047  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2048  if (sc->rap_group[rap_group_index].index > 0)
2049  keyframe = 1;
2050  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2051  rap_group_sample = 0;
2052  rap_group_index++;
2053  }
2054  }
2055  if (keyframe)
2056  distance = 0;
2057  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2058  if (sc->pseudo_stream_id == -1 ||
2059  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2060  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2061  e->pos = current_offset;
2062  e->timestamp = current_dts;
2063  e->size = sample_size;
2064  e->min_distance = distance;
2065  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2066  av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2067  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2068  current_offset, current_dts, sample_size, distance, keyframe);
2069  }
2070 
2071  current_offset += sample_size;
2072  stream_size += sample_size;
2073  current_dts += sc->stts_data[stts_index].duration;
2074  distance++;
2075  stts_sample++;
2076  current_sample++;
2077  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2078  stts_sample = 0;
2079  stts_index++;
2080  }
2081  }
2082  }
2083  if (st->duration > 0)
2084  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2085  } else {
2086  unsigned chunk_samples, total = 0;
2087 
2088  // compute total chunk count
2089  for (i = 0; i < sc->stsc_count; i++) {
2090  unsigned count, chunk_count;
2091 
2092  chunk_samples = sc->stsc_data[i].count;
2093  if (i != sc->stsc_count - 1 &&
2094  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2095  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2096  return;
2097  }
2098 
2099  if (sc->samples_per_frame >= 160) { // gsm
2100  count = chunk_samples / sc->samples_per_frame;
2101  } else if (sc->samples_per_frame > 1) {
2102  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2103  count = (chunk_samples+samples-1) / samples;
2104  } else {
2105  count = (chunk_samples+1023) / 1024;
2106  }
2107 
2108  if (i < sc->stsc_count - 1)
2109  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2110  else
2111  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2112  total += chunk_count * count;
2113  }
2114 
2115  av_dlog(mov->fc, "chunk count %d\n", total);
2116  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2117  return;
2118  mem = av_realloc(st->index_entries, (st->nb_index_entries + total) * sizeof(*st->index_entries));
2119  if (!mem)
2120  return;
2121  st->index_entries = mem;
2122  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2123 
2124  // populate index
2125  for (i = 0; i < sc->chunk_count; i++) {
2126  current_offset = sc->chunk_offsets[i];
2127  if (stsc_index + 1 < sc->stsc_count &&
2128  i + 1 == sc->stsc_data[stsc_index + 1].first)
2129  stsc_index++;
2130  chunk_samples = sc->stsc_data[stsc_index].count;
2131 
2132  while (chunk_samples > 0) {
2133  AVIndexEntry *e;
2134  unsigned size, samples;
2135 
2136  if (sc->samples_per_frame >= 160) { // gsm
2137  samples = sc->samples_per_frame;
2138  size = sc->bytes_per_frame;
2139  } else {
2140  if (sc->samples_per_frame > 1) {
2141  samples = FFMIN((1024 / sc->samples_per_frame)*
2142  sc->samples_per_frame, chunk_samples);
2143  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2144  } else {
2145  samples = FFMIN(1024, chunk_samples);
2146  size = samples * sc->sample_size;
2147  }
2148  }
2149 
2150  if (st->nb_index_entries >= total) {
2151  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2152  return;
2153  }
2154  e = &st->index_entries[st->nb_index_entries++];
2155  e->pos = current_offset;
2156  e->timestamp = current_dts;
2157  e->size = size;
2158  e->min_distance = 0;
2159  e->flags = AVINDEX_KEYFRAME;
2160  av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2161  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2162  size, samples);
2163 
2164  current_offset += size;
2165  current_dts += samples;
2166  chunk_samples -= samples;
2167  }
2168  }
2169  }
2170 }
2171 
2172 static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
2173  AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
2174 {
2175  /* try relative path, we do not try the absolute because it can leak information about our
2176  system to an attacker */
2177  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2178  char filename[1024];
2179  const char *src_path;
2180  int i, l;
2181 
2182  /* find a source dir */
2183  src_path = strrchr(src, '/');
2184  if (src_path)
2185  src_path++;
2186  else
2187  src_path = src;
2188 
2189  /* find a next level down to target */
2190  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2191  if (ref->path[l] == '/') {
2192  if (i == ref->nlvl_to - 1)
2193  break;
2194  else
2195  i++;
2196  }
2197 
2198  /* compose filename if next level down to target was found */
2199  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2200  memcpy(filename, src, src_path - src);
2201  filename[src_path - src] = 0;
2202 
2203  for (i = 1; i < ref->nlvl_from; i++)
2204  av_strlcat(filename, "../", 1024);
2205 
2206  av_strlcat(filename, ref->path + l + 1, 1024);
2207 
2208  if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2209  return 0;
2210  }
2211  } else if (use_absolute_path) {
2212  av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
2213  "this is a possible security issue\n");
2214  if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2215  return 0;
2216  }
2217 
2218  return AVERROR(ENOENT);
2219 }
2220 
2221 static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
2222 {
2223  if (sc->time_scale <= 0) {
2224  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2225  sc->time_scale = c->time_scale;
2226  if (sc->time_scale <= 0)
2227  sc->time_scale = 1;
2228  }
2229 }
2230 
2231 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2232 {
2233  AVStream *st;
2234  MOVStreamContext *sc;
2235  int ret;
2236 
2237  st = avformat_new_stream(c->fc, NULL);
2238  if (!st) return AVERROR(ENOMEM);
2239  st->id = c->fc->nb_streams;
2240  sc = av_mallocz(sizeof(MOVStreamContext));
2241  if (!sc) return AVERROR(ENOMEM);
2242 
2243  st->priv_data = sc;
2244  st->codec->codec_type = AVMEDIA_TYPE_DATA;
2245  sc->ffindex = st->index;
2246 
2247  if ((ret = mov_read_default(c, pb, atom)) < 0)
2248  return ret;
2249 
2250  /* sanity checks */
2251  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2252  (!sc->sample_size && !sc->sample_count))) {
2253  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2254  st->index);
2255  return 0;
2256  }
2257 
2258  fix_timescale(c, sc);
2259 
2260  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2261 
2262  mov_build_index(c, st);
2263 
2264  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2265  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2266  if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
2267  c->use_absolute_path, c->fc) < 0)
2268  av_log(c->fc, AV_LOG_ERROR,
2269  "stream %d, error opening alias: path='%s', dir='%s', "
2270  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2271  st->index, dref->path, dref->dir, dref->filename,
2272  dref->volume, dref->nlvl_from, dref->nlvl_to);
2273  } else {
2274  sc->pb = c->fc->pb;
2275  sc->pb_is_copied = 1;
2276  }
2277 
2278  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2279  if (!st->sample_aspect_ratio.num &&
2280  (st->codec->width != sc->width || st->codec->height != sc->height)) {
2281  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2282  ((double)st->codec->width * sc->height), INT_MAX);
2283  }
2284 
2285  if (st->duration > 0)
2286  av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2287  sc->time_scale*st->nb_frames, st->duration, INT_MAX);
2288 
2289 #if FF_API_R_FRAME_RATE
2290  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2291  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
2292  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2293 #endif
2294  }
2295 
2296  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2297  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2298  st->codec->codec_tag != MKTAG('a', 'v', 'c', '1')) {
2299  ff_generate_avci_extradata(st);
2300  }
2301 
2302  switch (st->codec->codec_id) {
2303 #if CONFIG_H261_DECODER
2304  case AV_CODEC_ID_H261:
2305 #endif
2306 #if CONFIG_H263_DECODER
2307  case AV_CODEC_ID_H263:
2308 #endif
2309 #if CONFIG_MPEG4_DECODER
2310  case AV_CODEC_ID_MPEG4:
2311 #endif
2312  st->codec->width = 0; /* let decoder init width/height */
2313  st->codec->height= 0;
2314  break;
2315  }
2316 
2317  /* Do not need those anymore. */
2318  av_freep(&sc->chunk_offsets);
2319  av_freep(&sc->stsc_data);
2320  av_freep(&sc->sample_sizes);
2321  av_freep(&sc->keyframes);
2322  av_freep(&sc->stts_data);
2323  av_freep(&sc->stps_data);
2324  av_freep(&sc->rap_group);
2325 
2326  return 0;
2327 }
2328 
2329 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2330 {
2331  int ret;
2332  c->itunes_metadata = 1;
2333  ret = mov_read_default(c, pb, atom);
2334  c->itunes_metadata = 0;
2335  return ret;
2336 }
2337 
2338 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2339 {
2340  while (atom.size > 8) {
2341  uint32_t tag = avio_rl32(pb);
2342  atom.size -= 4;
2343  if (tag == MKTAG('h','d','l','r')) {
2344  avio_seek(pb, -8, SEEK_CUR);
2345  atom.size += 8;
2346  return mov_read_default(c, pb, atom);
2347  }
2348  }
2349  return 0;
2350 }
2351 
2352 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2353 {
2354  int i;
2355  int width;
2356  int height;
2357  int64_t disp_transform[2];
2358  int display_matrix[3][2];
2359  AVStream *st;
2360  MOVStreamContext *sc;
2361  int version;
2362 
2363  if (c->fc->nb_streams < 1)
2364  return 0;
2365  st = c->fc->streams[c->fc->nb_streams-1];
2366  sc = st->priv_data;
2367 
2368  version = avio_r8(pb);
2369  avio_rb24(pb); /* flags */
2370  /*
2371  MOV_TRACK_ENABLED 0x0001
2372  MOV_TRACK_IN_MOVIE 0x0002
2373  MOV_TRACK_IN_PREVIEW 0x0004
2374  MOV_TRACK_IN_POSTER 0x0008
2375  */
2376 
2377  if (version == 1) {
2378  avio_rb64(pb);
2379  avio_rb64(pb);
2380  } else {
2381  avio_rb32(pb); /* creation time */
2382  avio_rb32(pb); /* modification time */
2383  }
2384  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2385  avio_rb32(pb); /* reserved */
2386 
2387  /* highlevel (considering edits) duration in movie timebase */
2388  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2389  avio_rb32(pb); /* reserved */
2390  avio_rb32(pb); /* reserved */
2391 
2392  avio_rb16(pb); /* layer */
2393  avio_rb16(pb); /* alternate group */
2394  avio_rb16(pb); /* volume */
2395  avio_rb16(pb); /* reserved */
2396 
2397  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2398  // they're kept in fixed point format through all calculations
2399  // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
2400  for (i = 0; i < 3; i++) {
2401  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2402  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2403  avio_rb32(pb); // 2.30 fixed point (not used)
2404  }
2405 
2406  width = avio_rb32(pb); // 16.16 fixed point track width
2407  height = avio_rb32(pb); // 16.16 fixed point track height
2408  sc->width = width >> 16;
2409  sc->height = height >> 16;
2410 
2411  //Assign clockwise rotate values based on transform matrix so that
2412  //we can compensate for iPhone orientation during capture.
2413 
2414  if (display_matrix[1][0] == -65536 && display_matrix[0][1] == 65536) {
2415  av_dict_set(&st->metadata, "rotate", "90", 0);
2416  }
2417 
2418  if (display_matrix[0][0] == -65536 && display_matrix[1][1] == -65536) {
2419  av_dict_set(&st->metadata, "rotate", "180", 0);
2420  }
2421 
2422  if (display_matrix[1][0] == 65536 && display_matrix[0][1] == -65536) {
2423  av_dict_set(&st->metadata, "rotate", "270", 0);
2424  }
2425 
2426  // transform the display width/height according to the matrix
2427  // skip this if the display matrix is the default identity matrix
2428  // or if it is rotating the picture, ex iPhone 3GS
2429  // to keep the same scale, use [width height 1<<16]
2430  if (width && height &&
2431  ((display_matrix[0][0] != 65536 ||
2432  display_matrix[1][1] != 65536) &&
2433  !display_matrix[0][1] &&
2434  !display_matrix[1][0] &&
2435  !display_matrix[2][0] && !display_matrix[2][1])) {
2436  for (i = 0; i < 2; i++)
2437  disp_transform[i] =
2438  (int64_t) width * display_matrix[0][i] +
2439  (int64_t) height * display_matrix[1][i] +
2440  ((int64_t) display_matrix[2][i] << 16);
2441 
2442  //sample aspect ratio is new width/height divided by old width/height
2443  st->sample_aspect_ratio = av_d2q(
2444  ((double) disp_transform[0] * height) /
2445  ((double) disp_transform[1] * width), INT_MAX);
2446  }
2447  return 0;
2448 }
2449 
2450 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2451 {
2452  MOVFragment *frag = &c->fragment;
2453  MOVTrackExt *trex = NULL;
2454  int flags, track_id, i;
2455 
2456  avio_r8(pb); /* version */
2457  flags = avio_rb24(pb);
2458 
2459  track_id = avio_rb32(pb);
2460  if (!track_id)
2461  return AVERROR_INVALIDDATA;
2462  frag->track_id = track_id;
2463  for (i = 0; i < c->trex_count; i++)
2464  if (c->trex_data[i].track_id == frag->track_id) {
2465  trex = &c->trex_data[i];
2466  break;
2467  }
2468  if (!trex) {
2469  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2470  return AVERROR_INVALIDDATA;
2471  }
2472 
2473  frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
2474  avio_rb64(pb) : frag->moof_offset;
2475  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2476 
2477  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2478  avio_rb32(pb) : trex->duration;
2479  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2480  avio_rb32(pb) : trex->size;
2481  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2482  avio_rb32(pb) : trex->flags;
2483  av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2484  return 0;
2485 }
2486 
2487 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2488 {
2489  c->chapter_track = avio_rb32(pb);
2490  return 0;
2491 }
2492 
2493 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2494 {
2495  MOVTrackExt *trex;
2496 
2497  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2498  return AVERROR_INVALIDDATA;
2499  trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
2500  if (!trex)
2501  return AVERROR(ENOMEM);
2502 
2503  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
2504 
2505  c->trex_data = trex;
2506  trex = &c->trex_data[c->trex_count++];
2507  avio_r8(pb); /* version */
2508  avio_rb24(pb); /* flags */
2509  trex->track_id = avio_rb32(pb);
2510  trex->stsd_id = avio_rb32(pb);
2511  trex->duration = avio_rb32(pb);
2512  trex->size = avio_rb32(pb);
2513  trex->flags = avio_rb32(pb);
2514  return 0;
2515 }
2516 
2517 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2518 {
2519  MOVFragment *frag = &c->fragment;
2520  AVStream *st = NULL;
2521  MOVStreamContext *sc;
2522  MOVStts *ctts_data;
2523  uint64_t offset;
2524  int64_t dts;
2525  int data_offset = 0;
2526  unsigned entries, first_sample_flags = frag->flags;
2527  int flags, distance, i, found_keyframe = 0;
2528 
2529  for (i = 0; i < c->fc->nb_streams; i++) {
2530  if (c->fc->streams[i]->id == frag->track_id) {
2531  st = c->fc->streams[i];
2532  break;
2533  }
2534  }
2535  if (!st) {
2536  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2537  return AVERROR_INVALIDDATA;
2538  }
2539  sc = st->priv_data;
2540  if (sc->pseudo_stream_id+1 != frag->stsd_id)
2541  return 0;
2542  avio_r8(pb); /* version */
2543  flags = avio_rb24(pb);
2544  entries = avio_rb32(pb);
2545  av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2546 
2547  /* Always assume the presence of composition time offsets.
2548  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2549  * 1) in the initial movie, there are no samples.
2550  * 2) in the first movie fragment, there is only one sample without composition time offset.
2551  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2552  if (!sc->ctts_count && sc->sample_count)
2553  {
2554  /* Complement ctts table if moov atom doesn't have ctts atom. */
2555  ctts_data = av_malloc(sizeof(*sc->ctts_data));
2556  if (!ctts_data)
2557  return AVERROR(ENOMEM);
2558  sc->ctts_data = ctts_data;
2559  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
2560  sc->ctts_data[sc->ctts_count].duration = 0;
2561  sc->ctts_count++;
2562  }
2563  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2564  return AVERROR_INVALIDDATA;
2565  ctts_data = av_realloc(sc->ctts_data,
2566  (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2567  if (!ctts_data)
2568  return AVERROR(ENOMEM);
2569  sc->ctts_data = ctts_data;
2570 
2571  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
2572  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
2573  dts = sc->track_end - sc->time_offset;
2574  offset = frag->base_data_offset + data_offset;
2575  distance = 0;
2576  av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2577  for (i = 0; i < entries && !pb->eof_reached; i++) {
2578  unsigned sample_size = frag->size;
2579  int sample_flags = i ? frag->flags : first_sample_flags;
2580  unsigned sample_duration = frag->duration;
2581  int keyframe = 0;
2582 
2583  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
2584  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
2585  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
2586  sc->ctts_data[sc->ctts_count].count = 1;
2587  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
2588  avio_rb32(pb) : 0;
2589  mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
2590  sc->ctts_count++;
2591  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2592  keyframe = 1;
2593  else if (!found_keyframe)
2594  keyframe = found_keyframe =
2595  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
2596  MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
2597  if (keyframe)
2598  distance = 0;
2599  av_add_index_entry(st, offset, dts, sample_size, distance,
2600  keyframe ? AVINDEX_KEYFRAME : 0);
2601  av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2602  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2603  offset, dts, sample_size, distance, keyframe);
2604  distance++;
2605  dts += sample_duration;
2606  offset += sample_size;
2607  sc->data_size += sample_size;
2608  }
2609 
2610  if (pb->eof_reached)
2611  return AVERROR_EOF;
2612 
2613  frag->moof_offset = offset;
2614  st->duration = sc->track_end = dts + sc->time_offset;
2615  return 0;
2616 }
2617 
2618 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2619 /* like the files created with Adobe Premiere 5.0, for samples see */
2620 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2621 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2622 {
2623  int err;
2624 
2625  if (atom.size < 8)
2626  return 0; /* continue */
2627  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2628  avio_skip(pb, atom.size - 4);
2629  return 0;
2630  }
2631  atom.type = avio_rl32(pb);
2632  atom.size -= 8;
2633  if (atom.type != MKTAG('m','d','a','t')) {
2634  avio_skip(pb, atom.size);
2635  return 0;
2636  }
2637  err = mov_read_mdat(c, pb, atom);
2638  return err;
2639 }
2640 
2641 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2642 {
2643 #if CONFIG_ZLIB
2644  AVIOContext ctx;
2645  uint8_t *cmov_data;
2646  uint8_t *moov_data; /* uncompressed data */
2647  long cmov_len, moov_len;
2648  int ret = -1;
2649 
2650  avio_rb32(pb); /* dcom atom */
2651  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2652  return AVERROR_INVALIDDATA;
2653  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2654  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
2655  return AVERROR_INVALIDDATA;
2656  }
2657  avio_rb32(pb); /* cmvd atom */
2658  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2659  return AVERROR_INVALIDDATA;
2660  moov_len = avio_rb32(pb); /* uncompressed size */
2661  cmov_len = atom.size - 6 * 4;
2662 
2663  cmov_data = av_malloc(cmov_len);
2664  if (!cmov_data)
2665  return AVERROR(ENOMEM);
2666  moov_data = av_malloc(moov_len);
2667  if (!moov_data) {
2668  av_free(cmov_data);
2669  return AVERROR(ENOMEM);
2670  }
2671  avio_read(pb, cmov_data, cmov_len);
2672  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2673  goto free_and_return;
2674  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2675  goto free_and_return;
2676  atom.type = MKTAG('m','o','o','v');
2677  atom.size = moov_len;
2678  ret = mov_read_default(c, &ctx, atom);
2679 free_and_return:
2680  av_free(moov_data);
2681  av_free(cmov_data);
2682  return ret;
2683 #else
2684  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2685  return AVERROR(ENOSYS);
2686 #endif
2687 }
2688 
2689 /* edit list atom */
2690 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2691 {
2692  MOVStreamContext *sc;
2693  int i, edit_count, version, edit_start_index = 0;
2694  int unsupported = 0;
2695 
2696  if (c->fc->nb_streams < 1 || c->ignore_editlist)
2697  return 0;
2698  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2699 
2700  version = avio_r8(pb); /* version */
2701  avio_rb24(pb); /* flags */
2702  edit_count = avio_rb32(pb); /* entries */
2703 
2704  if ((uint64_t)edit_count*12+8 > atom.size)
2705  return AVERROR_INVALIDDATA;
2706 
2707  av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2708  for (i=0; i<edit_count; i++){
2709  int64_t time;
2710  int64_t duration;
2711  int rate;
2712  if (version == 1) {
2713  duration = avio_rb64(pb);
2714  time = avio_rb64(pb);
2715  } else {
2716  duration = avio_rb32(pb); /* segment duration */
2717  time = (int32_t)avio_rb32(pb); /* media time */
2718  }
2719  rate = avio_rb32(pb);
2720  if (i == 0 && time == -1) {
2721  sc->empty_duration = duration;
2722  edit_start_index = 1;
2723  } else if (i == edit_start_index && time >= 0)
2724  sc->start_time = time;
2725  else
2726  unsupported = 1;
2727 
2728  av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
2729  duration, time, rate / 65536.0);
2730  }
2731 
2732  if (unsupported)
2733  av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2734  "a/v desync might occur, patch welcome\n");
2735 
2736  return 0;
2737 }
2738 
2739 static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2740 {
2741  MOVStreamContext *sc;
2742 
2743  if (c->fc->nb_streams < 1)
2744  return AVERROR_INVALIDDATA;
2745  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
2746  sc->timecode_track = avio_rb32(pb);
2747  return 0;
2748 }
2749 
2750 static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2751 {
2752  int ret;
2753  uint8_t uuid[16];
2754  static const uint8_t uuid_isml_manifest[] = {
2755  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
2756  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
2757  };
2758 
2759  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
2760  return AVERROR_INVALIDDATA;
2761 
2762  ret = avio_read(pb, uuid, sizeof(uuid));
2763  if (ret < 0) {
2764  return ret;
2765  } else if (ret != sizeof(uuid)) {
2766  return AVERROR_INVALIDDATA;
2767  }
2768  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
2769  uint8_t *buffer, *ptr;
2770  char *endptr;
2771  size_t len = atom.size - sizeof(uuid);
2772 
2773  if (len < 4) {
2774  return AVERROR_INVALIDDATA;
2775  }
2776  ret = avio_skip(pb, 4); // zeroes
2777  len -= 4;
2778 
2779  buffer = av_mallocz(len + 1);
2780  if (!buffer) {
2781  return AVERROR(ENOMEM);
2782  }
2783  ret = avio_read(pb, buffer, len);
2784  if (ret < 0) {
2785  av_free(buffer);
2786  return ret;
2787  } else if (ret != len) {
2788  av_free(buffer);
2789  return AVERROR_INVALIDDATA;
2790  }
2791 
2792  ptr = buffer;
2793  while ((ptr = av_stristr(ptr, "systemBitrate=\"")) != NULL) {
2794  ptr += sizeof("systemBitrate=\"") - 1;
2795  c->bitrates_count++;
2796  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
2797  if (!c->bitrates) {
2798  c->bitrates_count = 0;
2799  av_free(buffer);
2800  return AVERROR(ENOMEM);
2801  }
2802  errno = 0;
2803  ret = strtol(ptr, &endptr, 10);
2804  if (ret < 0 || errno || *endptr != '"') {
2805  c->bitrates[c->bitrates_count - 1] = 0;
2806  } else {
2807  c->bitrates[c->bitrates_count - 1] = ret;
2808  }
2809  }
2810 
2811  av_free(buffer);
2812  }
2813  return 0;
2814 }
2815 
2816 static const MOVParseTableEntry mov_default_parse_table[] = {
2817 { MKTAG('A','C','L','R'), mov_read_avid },
2818 { MKTAG('A','P','R','G'), mov_read_avid },
2819 { MKTAG('A','A','L','P'), mov_read_avid },
2820 { MKTAG('A','R','E','S'), mov_read_ares },
2821 { MKTAG('a','v','s','s'), mov_read_avss },
2822 { MKTAG('c','h','p','l'), mov_read_chpl },
2823 { MKTAG('c','o','6','4'), mov_read_stco },
2824 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2825 { MKTAG('d','i','n','f'), mov_read_default },
2826 { MKTAG('d','r','e','f'), mov_read_dref },
2827 { MKTAG('e','d','t','s'), mov_read_default },
2828 { MKTAG('e','l','s','t'), mov_read_elst },
2829 { MKTAG('e','n','d','a'), mov_read_enda },
2830 { MKTAG('f','i','e','l'), mov_read_fiel },
2831 { MKTAG('f','t','y','p'), mov_read_ftyp },
2832 { MKTAG('g','l','b','l'), mov_read_glbl },
2833 { MKTAG('h','d','l','r'), mov_read_hdlr },
2834 { MKTAG('i','l','s','t'), mov_read_ilst },
2835 { MKTAG('j','p','2','h'), mov_read_jp2h },
2836 { MKTAG('m','d','a','t'), mov_read_mdat },
2837 { MKTAG('m','d','h','d'), mov_read_mdhd },
2838 { MKTAG('m','d','i','a'), mov_read_default },
2839 { MKTAG('m','e','t','a'), mov_read_meta },
2840 { MKTAG('m','i','n','f'), mov_read_default },
2841 { MKTAG('m','o','o','f'), mov_read_moof },
2842 { MKTAG('m','o','o','v'), mov_read_moov },
2843 { MKTAG('m','v','e','x'), mov_read_default },
2844 { MKTAG('m','v','h','d'), mov_read_mvhd },
2845 { MKTAG('S','M','I',' '), mov_read_svq3 },
2846 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
2847 { MKTAG('a','v','c','C'), mov_read_glbl },
2848 { MKTAG('p','a','s','p'), mov_read_pasp },
2849 { MKTAG('s','t','b','l'), mov_read_default },
2850 { MKTAG('s','t','c','o'), mov_read_stco },
2851 { MKTAG('s','t','p','s'), mov_read_stps },
2852 { MKTAG('s','t','r','f'), mov_read_strf },
2853 { MKTAG('s','t','s','c'), mov_read_stsc },
2854 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2855 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2856 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2857 { MKTAG('s','t','t','s'), mov_read_stts },
2858 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2859 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2860 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2861 { MKTAG('t','r','a','k'), mov_read_trak },
2862 { MKTAG('t','r','a','f'), mov_read_default },
2863 { MKTAG('t','r','e','f'), mov_read_default },
2864 { MKTAG('t','m','c','d'), mov_read_tmcd },
2865 { MKTAG('c','h','a','p'), mov_read_chap },
2866 { MKTAG('t','r','e','x'), mov_read_trex },
2867 { MKTAG('t','r','u','n'), mov_read_trun },
2868 { MKTAG('u','d','t','a'), mov_read_default },
2869 { MKTAG('w','a','v','e'), mov_read_wave },
2870 { MKTAG('e','s','d','s'), mov_read_esds },
2871 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2872 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
2873 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2874 { MKTAG('w','f','e','x'), mov_read_wfex },
2875 { MKTAG('c','m','o','v'), mov_read_cmov },
2876 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
2877 { MKTAG('d','v','c','1'), mov_read_dvc1 },
2878 { MKTAG('s','b','g','p'), mov_read_sbgp },
2879 { MKTAG('u','u','i','d'), mov_read_uuid },
2880 { 0, NULL }
2881 };
2882 
2883 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2884 {
2885  int64_t total_size = 0;
2886  MOVAtom a;
2887  int i;
2888 
2889  if (atom.size < 0)
2890  atom.size = INT64_MAX;
2891  while (total_size + 8 <= atom.size && !url_feof(pb)) {
2892  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
2893  a.size = atom.size;
2894  a.type=0;
2895  if (atom.size >= 8) {
2896  a.size = avio_rb32(pb);
2897  a.type = avio_rl32(pb);
2898  if (atom.type != MKTAG('r','o','o','t') &&
2899  atom.type != MKTAG('m','o','o','v'))
2900  {
2901  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
2902  {
2903  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
2904  avio_skip(pb, -8);
2905  return 0;
2906  }
2907  }
2908  total_size += 8;
2909  if (a.size == 1) { /* 64 bit extended size */
2910  a.size = avio_rb64(pb) - 8;
2911  total_size += 8;
2912  }
2913  }
2914  av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
2915  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
2916  if (a.size == 0) {
2917  a.size = atom.size - total_size + 8;
2918  }
2919  a.size -= 8;
2920  if (a.size < 0)
2921  break;
2922  a.size = FFMIN(a.size, atom.size - total_size);
2923 
2924  for (i = 0; mov_default_parse_table[i].type; i++)
2925  if (mov_default_parse_table[i].type == a.type) {
2926  parse = mov_default_parse_table[i].parse;
2927  break;
2928  }
2929 
2930  // container is user data
2931  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
2932  atom.type == MKTAG('i','l','s','t')))
2933  parse = mov_read_udta_string;
2934 
2935  if (!parse) { /* skip leaf atoms data */
2936  avio_skip(pb, a.size);
2937  } else {
2938  int64_t start_pos = avio_tell(pb);
2939  int64_t left;
2940  int err = parse(c, pb, a);
2941  if (err < 0)
2942  return err;
2943  if (c->found_moov && c->found_mdat &&
2944  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
2945  start_pos + a.size == avio_size(pb))) {
2946  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
2947  c->next_root_atom = start_pos + a.size;
2948  return 0;
2949  }
2950  left = a.size - avio_tell(pb) + start_pos;
2951  if (left > 0) /* skip garbage at atom end */
2952  avio_skip(pb, left);
2953  else if(left < 0) {
2954  av_log(c->fc, AV_LOG_DEBUG, "undoing overread of %"PRId64" in '%.4s'\n", -left, (char*)&a.type);
2955  avio_seek(pb, left, SEEK_CUR);
2956  }
2957  }
2958 
2959  total_size += a.size;
2960  }
2961 
2962  if (total_size < atom.size && atom.size < 0x7ffff)
2963  avio_skip(pb, atom.size - total_size);
2964 
2965  return 0;
2966 }
2967 
2968 static int mov_probe(AVProbeData *p)
2969 {
2970  int64_t offset;
2971  uint32_t tag;
2972  int score = 0;
2973  int moov_offset = -1;
2974 
2975  /* check file header */
2976  offset = 0;
2977  for (;;) {
2978  /* ignore invalid offset */
2979  if ((offset + 8) > (unsigned int)p->buf_size)
2980  break;
2981  tag = AV_RL32(p->buf + offset + 4);
2982  switch(tag) {
2983  /* check for obvious tags */
2984  case MKTAG('m','o','o','v'):
2985  moov_offset = offset + 4;
2986  case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2987  case MKTAG('m','d','a','t'):
2988  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2989  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2990  case MKTAG('f','t','y','p'):
2991  if (AV_RB32(p->buf+offset) < 8 &&
2992  (AV_RB32(p->buf+offset) != 1 ||
2993  offset + 12 > (unsigned int)p->buf_size ||
2994  AV_RB64(p->buf+offset + 8) == 0)) {
2995  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
2996  } else {
2997  score = AVPROBE_SCORE_MAX;
2998  }
2999  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3000  break;
3001  /* those are more common words, so rate then a bit less */
3002  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3003  case MKTAG('w','i','d','e'):
3004  case MKTAG('f','r','e','e'):
3005  case MKTAG('j','u','n','k'):
3006  case MKTAG('p','i','c','t'):
3007  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3008  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3009  break;
3010  case MKTAG(0x82,0x82,0x7f,0x7d):
3011  case MKTAG('s','k','i','p'):
3012  case MKTAG('u','u','i','d'):
3013  case MKTAG('p','r','f','l'):
3014  /* if we only find those cause probedata is too small at least rate them */
3015  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3016  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3017  break;
3018  default:
3019  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3020  }
3021  }
3022  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3023  /* moov atom in the header - we should make sure that this is not a
3024  * MOV-packed MPEG-PS */
3025  offset = moov_offset;
3026 
3027  while(offset < (p->buf_size - 16)){ /* Sufficient space */
3028  /* We found an actual hdlr atom */
3029  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3030  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3031  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3032  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3033  /* We found a media handler reference atom describing an
3034  * MPEG-PS-in-MOV, return a
3035  * low score to force expanding the probe window until
3036  * mpegps_probe finds what it needs */
3037  return 5;
3038  }else
3039  /* Keep looking */
3040  offset+=2;
3041  }
3042  }
3043 
3044  return score;
3045 }
3046 
3047 // must be done after parsing all trak because there's no order requirement
3048 static void mov_read_chapters(AVFormatContext *s)
3049 {
3050  MOVContext *mov = s->priv_data;
3051  AVStream *st = NULL;
3052  MOVStreamContext *sc;
3053  int64_t cur_pos;
3054  int i;
3055 
3056  for (i = 0; i < s->nb_streams; i++)
3057  if (s->streams[i]->id == mov->chapter_track) {
3058  st = s->streams[i];
3059  break;
3060  }
3061  if (!st) {
3062  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3063  return;
3064  }
3065 
3066  st->discard = AVDISCARD_ALL;
3067  sc = st->priv_data;
3068  cur_pos = avio_tell(sc->pb);
3069 
3070  for (i = 0; i < st->nb_index_entries; i++) {
3071  AVIndexEntry *sample = &st->index_entries[i];
3072  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3073  uint8_t *title;
3074  uint16_t ch;
3075  int len, title_len;
3076 
3077  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3078  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3079  goto finish;
3080  }
3081 
3082  // the first two bytes are the length of the title
3083  len = avio_rb16(sc->pb);
3084  if (len > sample->size-2)
3085  continue;
3086  title_len = 2*len + 1;
3087  if (!(title = av_mallocz(title_len)))
3088  goto finish;
3089 
3090  // The samples could theoretically be in any encoding if there's an encd
3091  // atom following, but in practice are only utf-8 or utf-16, distinguished
3092  // instead by the presence of a BOM
3093  if (!len) {
3094  title[0] = 0;
3095  } else {
3096  ch = avio_rb16(sc->pb);
3097  if (ch == 0xfeff)
3098  avio_get_str16be(sc->pb, len, title, title_len);
3099  else if (ch == 0xfffe)
3100  avio_get_str16le(sc->pb, len, title, title_len);
3101  else {
3102  AV_WB16(title, ch);
3103  if (len == 1 || len == 2)
3104  title[len] = 0;
3105  else
3106  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3107  }
3108  }
3109 
3110  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3111  av_freep(&title);
3112  }
3113 finish:
3114  avio_seek(sc->pb, cur_pos, SEEK_SET);
3115 }
3116 
3117 static int parse_timecode_in_framenum_format(AVFormatContext *s, AVStream *st,
3118  uint32_t value, int flags)
3119 {
3120  AVTimecode tc;
3121  char buf[AV_TIMECODE_STR_SIZE];
3122  AVRational rate = {st->codec->time_base.den,
3123  st->codec->time_base.num};
3124  int ret = av_timecode_init(&tc, rate, flags, 0, s);
3125  if (ret < 0)
3126  return ret;
3127  av_dict_set(&st->metadata, "timecode",
3128  av_timecode_make_string(&tc, buf, value), 0);
3129  return 0;
3130 }
3131 
3132 static int mov_read_timecode_track(AVFormatContext *s, AVStream *st)
3133 {
3134  MOVStreamContext *sc = st->priv_data;
3135  int flags = 0;
3136  int64_t cur_pos = avio_tell(sc->pb);
3137  uint32_t value;
3138 
3139  if (!st->nb_index_entries)
3140  return -1;
3141 
3142  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3143  value = avio_rb32(s->pb);
3144 
3145  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3146  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3147  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3148 
3149  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3150  * not the case) and thus assume "frame number format" instead of QT one.
3151  * No sample with tmcd track can be found with a QT timecode at the moment,
3152  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3153  * format). */
3154  parse_timecode_in_framenum_format(s, st, value, flags);
3155 
3156  avio_seek(sc->pb, cur_pos, SEEK_SET);
3157  return 0;
3158 }
3159 
3160 static int mov_read_close(AVFormatContext *s)
3161 {
3162  MOVContext *mov = s->priv_data;
3163  int i, j;
3164 
3165  for (i = 0; i < s->nb_streams; i++) {
3166  AVStream *st = s->streams[i];
3167  MOVStreamContext *sc = st->priv_data;
3168 
3169  av_freep(&sc->ctts_data);
3170  for (j = 0; j < sc->drefs_count; j++) {
3171  av_freep(&sc->drefs[j].path);
3172  av_freep(&sc->drefs[j].dir);
3173  }
3174  av_freep(&sc->drefs);
3175  if (!sc->pb_is_copied)
3176  avio_close(sc->pb);
3177  sc->pb = NULL;
3178  av_freep(&sc->chunk_offsets);
3179  av_freep(&sc->keyframes);
3180  av_freep(&sc->sample_sizes);
3181  av_freep(&sc->stps_data);
3182  av_freep(&sc->stsc_data);
3183  av_freep(&sc->stts_data);
3184  }
3185 
3186  if (mov->dv_demux) {
3187  for (i = 0; i < mov->dv_fctx->nb_streams; i++) {
3188  av_freep(&mov->dv_fctx->streams[i]->codec);
3189  av_freep(&mov->dv_fctx->streams[i]);
3190  }
3191  av_freep(&mov->dv_fctx);
3192  av_freep(&mov->dv_demux);
3193  }
3194 
3195  av_freep(&mov->trex_data);
3196  av_freep(&mov->bitrates);
3197 
3198  return 0;
3199 }
3200 
3201 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
3202 {
3203  int i;
3204 
3205  for (i = 0; i < s->nb_streams; i++) {
3206  AVStream *st = s->streams[i];
3207  MOVStreamContext *sc = st->priv_data;
3208 
3209  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3210  sc->timecode_track == tmcd_id)
3211  return 1;
3212  }
3213  return 0;
3214 }
3215 
3216 /* look for a tmcd track not referenced by any video track, and export it globally */
3217 static void export_orphan_timecode(AVFormatContext *s)
3218 {
3219  int i;
3220 
3221  for (i = 0; i < s->nb_streams; i++) {
3222  AVStream *st = s->streams[i];
3223 
3224  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
3225  !tmcd_is_referenced(s, i + 1)) {
3226  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
3227  if (tcr) {
3228  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
3229  break;
3230  }
3231  }
3232  }
3233 }
3234 
3235 static int mov_read_header(AVFormatContext *s)
3236 {
3237  MOVContext *mov = s->priv_data;
3238  AVIOContext *pb = s->pb;
3239  int i, j, err;
3240  MOVAtom atom = { AV_RL32("root") };
3241 
3242  mov->fc = s;
3243  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
3244  if (pb->seekable)
3245  atom.size = avio_size(pb);
3246  else
3247  atom.size = INT64_MAX;
3248 
3249  /* check MOV header */
3250  if ((err = mov_read_default(mov, pb, atom)) < 0) {
3251  av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
3252  mov_read_close(s);
3253  return err;
3254  }
3255  if (!mov->found_moov) {
3256  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
3257  mov_read_close(s);
3258  return AVERROR_INVALIDDATA;
3259  }
3260  av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
3261 
3262  if (pb->seekable) {
3263  if (mov->chapter_track > 0)
3264  mov_read_chapters(s);
3265  for (i = 0; i < s->nb_streams; i++)
3266  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
3267  mov_read_timecode_track(s, s->streams[i]);
3268  }
3269 
3270  /* copy timecode metadata from tmcd tracks to the related video streams */
3271  for (i = 0; i < s->nb_streams; i++) {
3272  AVStream *st = s->streams[i];
3273  MOVStreamContext *sc = st->priv_data;
3274  if (sc->timecode_track > 0) {
3275  AVDictionaryEntry *tcr;
3276  int tmcd_st_id = -1;
3277 
3278  for (j = 0; j < s->nb_streams; j++)
3279  if (s->streams[j]->id == sc->timecode_track)
3280  tmcd_st_id = j;
3281 
3282  if (tmcd_st_id < 0 || tmcd_st_id == i)
3283  continue;
3284  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
3285  if (tcr)
3286  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
3287  }
3288  }
3289  export_orphan_timecode(s);
3290 
3291  for (i = 0; i < s->nb_streams; i++) {
3292  AVStream *st = s->streams[i];
3293  MOVStreamContext *sc = st->priv_data;
3294  fix_timescale(mov, sc);
3295  if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_AAC) {
3296  st->skip_samples = sc->start_pad;
3297  }
3298  }
3299 
3300  if (mov->trex_data) {
3301  for (i = 0; i < s->nb_streams; i++) {
3302  AVStream *st = s->streams[i];
3303  MOVStreamContext *sc = st->priv_data;
3304  if (st->duration)
3305  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
3306  }
3307  }
3308 
3309  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
3310  if (mov->bitrates[i]) {
3311  s->streams[i]->codec->bit_rate = mov->bitrates[i];
3312  }
3313  }
3314 
3315  return 0;
3316 }
3317 
3318 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
3319 {
3320  AVIndexEntry *sample = NULL;
3321  int64_t best_dts = INT64_MAX;
3322  int i;
3323  for (i = 0; i < s->nb_streams; i++) {
3324  AVStream *avst = s->streams[i];
3325  MOVStreamContext *msc = avst->priv_data;
3326  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
3327  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
3328  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
3329  av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
3330  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
3331  (s->pb->seekable &&
3332  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
3333  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
3334  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
3335  sample = current_sample;
3336  best_dts = dts;
3337  *st = avst;
3338  }
3339  }
3340  }
3341  return sample;
3342 }
3343 
3344 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
3345 {
3346  MOVContext *mov = s->priv_data;
3347  MOVStreamContext *sc;
3348  AVIndexEntry *sample;
3349  AVStream *st = NULL;
3350  int ret;
3351  mov->fc = s;
3352  retry:
3353  sample = mov_find_next_sample(s, &st);
3354  if (!sample) {
3355  mov->found_mdat = 0;
3356  if (!mov->next_root_atom)
3357  return AVERROR_EOF;
3358  avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
3359  mov->next_root_atom = 0;
3360  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
3361  url_feof(s->pb))
3362  return AVERROR_EOF;
3363  av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
3364  goto retry;
3365  }
3366  sc = st->priv_data;
3367  /* must be done just before reading, to avoid infinite loop on sample */
3368  sc->current_sample++;
3369 
3370  if (mov->next_root_atom) {
3371  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
3372  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
3373  }
3374 
3375  if (st->discard != AVDISCARD_ALL) {
3376  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3377  av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
3378  sc->ffindex, sample->pos);
3379  return AVERROR_INVALIDDATA;
3380  }
3381  ret = av_get_packet(sc->pb, pkt, sample->size);
3382  if (ret < 0)
3383  return ret;
3384  if (sc->has_palette) {
3385  uint8_t *pal;
3386 
3387  pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
3388  if (!pal) {
3389  av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
3390  } else {
3391  memcpy(pal, sc->palette, AVPALETTE_SIZE);
3392  sc->has_palette = 0;
3393  }
3394  }
3395 #if CONFIG_DV_DEMUXER
3396  if (mov->dv_demux && sc->dv_audio_container) {
3397  avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
3398  av_free(pkt->data);
3399  pkt->size = 0;
3400  ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
3401  if (ret < 0)
3402  return ret;
3403  }
3404 #endif
3405  }
3406 
3407  pkt->stream_index = sc->ffindex;
3408  pkt->dts = sample->timestamp;
3409  if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
3410  pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
3411  /* update ctts context */
3412  sc->ctts_sample++;
3413  if (sc->ctts_index < sc->ctts_count &&
3414  sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
3415  sc->ctts_index++;
3416  sc->ctts_sample = 0;
3417  }
3418  if (sc->wrong_dts)
3419  pkt->dts = AV_NOPTS_VALUE;
3420  } else {
3421  int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
3422  st->index_entries[sc->current_sample].timestamp : st->duration;
3423  pkt->duration = next_dts - pkt->dts;
3424  pkt->pts = pkt->dts;
3425  }
3426  if (st->discard == AVDISCARD_ALL)
3427  goto retry;
3428  pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
3429  pkt->pos = sample->pos;
3430  av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
3431  pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
3432  return 0;
3433 }
3434 
3435 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
3436 {
3437  MOVStreamContext *sc = st->priv_data;
3438  int sample, time_sample;
3439  int i;
3440 
3441  sample = av_index_search_timestamp(st, timestamp, flags);
3442  av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
3443  if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
3444  sample = 0;
3445  if (sample < 0) /* not sure what to do */
3446  return AVERROR_INVALIDDATA;
3447  sc->current_sample = sample;
3448  av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
3449  /* adjust ctts index */
3450  if (sc->ctts_data) {
3451  time_sample = 0;
3452  for (i = 0; i < sc->ctts_count; i++) {
3453  int next = time_sample + sc->ctts_data[i].count;
3454  if (next > sc->current_sample) {
3455  sc->ctts_index = i;
3456  sc->ctts_sample = sc->current_sample - time_sample;
3457  break;
3458  }
3459  time_sample = next;
3460  }
3461  }
3462  return sample;
3463 }
3464 
3465 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3466 {
3467  AVStream *st;
3468  int64_t seek_timestamp, timestamp;
3469  int sample;
3470  int i;
3471 
3472  if (stream_index >= s->nb_streams)
3473  return AVERROR_INVALIDDATA;
3474 
3475  st = s->streams[stream_index];
3476  sample = mov_seek_stream(s, st, sample_time, flags);
3477  if (sample < 0)
3478  return sample;
3479 
3480  /* adjust seek timestamp to found sample timestamp */
3481  seek_timestamp = st->index_entries[sample].timestamp;
3482 
3483  for (i = 0; i < s->nb_streams; i++) {
3484  MOVStreamContext *sc = s->streams[i]->priv_data;
3485  st = s->streams[i];
3486  st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
3487 
3488  if (stream_index == i)
3489  continue;
3490 
3491  timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
3492  mov_seek_stream(s, st, timestamp, flags);
3493  }
3494  return 0;
3495 }
3496 
3497 static const AVOption options[] = {
3498  {"use_absolute_path",
3499  "allow using absolute path when opening alias, this is a possible security issue",
3500  offsetof(MOVContext, use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
3501  0, 1, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_DECODING_PARAM},
3502  {"ignore_editlist", "", offsetof(MOVContext, ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
3503  0, 1, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_DECODING_PARAM},
3504  {NULL}
3505 };
3506 
3507 static const AVClass mov_class = {
3508  .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
3509  .item_name = av_default_item_name,
3510  .option = options,
3511  .version = LIBAVUTIL_VERSION_INT,
3512 };
3513 
3514 AVInputFormat ff_mov_demuxer = {
3515  .name = "mov,mp4,m4a,3gp,3g2,mj2",
3516  .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
3517  .priv_data_size = sizeof(MOVContext),
3518  .read_probe = mov_probe,
3519  .read_header = mov_read_header,
3520  .read_packet = mov_read_packet,
3521  .read_close = mov_read_close,
3522  .read_seek = mov_read_seek,
3523  .priv_class = &mov_class,
3524  .flags = AVFMT_NO_BYTE_SEEK,
3525 };
Generated on Wed Jul 10 2013 23:48:12 for FFmpeg by   doxygen 1.8.2