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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 #include <stdint.h>
28 
29 //#define MOV_EXPORT_ALL_METADATA
30 
31 #include "libavutil/attributes.h"
32 #include "libavutil/channel_layout.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/intfloat.h"
35 #include "libavutil/mathematics.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/opt.h"
39 #include "libavutil/timecode.h"
40 #include "libavcodec/ac3tab.h"
41 #include "avformat.h"
42 #include "internal.h"
43 #include "avio_internal.h"
44 #include "riff.h"
45 #include "isom.h"
46 #include "libavcodec/get_bits.h"
47 #include "id3v1.h"
48 #include "mov_chan.h"
49 
50 #if CONFIG_ZLIB
51 #include <zlib.h>
52 #endif
53 
54 #include "qtpalette.h"
55 
56 
57 #undef NDEBUG
58 #include <assert.h>
59 
60 /* those functions parse an atom */
61 /* links atom IDs to parse functions */
62 typedef struct MOVParseTableEntry {
63  uint32_t type;
64  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
65 } MOVParseTableEntry;
66 
67 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
68 
69 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
70  unsigned len, const char *key)
71 {
72  char buf[16];
73 
74  short current, total = 0;
75  avio_rb16(pb); // unknown
76  current = avio_rb16(pb);
77  if (len >= 6)
78  total = avio_rb16(pb);
79  if (!total)
80  snprintf(buf, sizeof(buf), "%d", current);
81  else
82  snprintf(buf, sizeof(buf), "%d/%d", current, total);
83  av_dict_set(&c->fc->metadata, key, buf, 0);
84 
85  return 0;
86 }
87 
88 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
89  unsigned len, const char *key)
90 {
91  char buf[16];
92 
93  /* bypass padding bytes */
94  avio_r8(pb);
95  avio_r8(pb);
96  avio_r8(pb);
97 
98  snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
99  av_dict_set(&c->fc->metadata, key, buf, 0);
100 
101  return 0;
102 }
103 
104 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
105  unsigned len, const char *key)
106 {
107  char buf[16];
108 
109  snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
110  av_dict_set(&c->fc->metadata, key, buf, 0);
111 
112  return 0;
113 }
114 
115 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
116  unsigned len, const char *key)
117 {
118  short genre;
119  char buf[20];
120 
121  avio_r8(pb); // unknown
122 
123  genre = avio_r8(pb);
124  if (genre < 1 || genre > ID3v1_GENRE_MAX)
125  return 0;
126  snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
127  av_dict_set(&c->fc->metadata, key, buf, 0);
128 
129  return 0;
130 }
131 
132 static int mov_read_custom_metadata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
133 {
134  char key[1024]={0}, data[1024]={0};
135  int i;
136  AVStream *st;
137  MOVStreamContext *sc;
138 
139  if (c->fc->nb_streams < 1)
140  return 0;
141  st = c->fc->streams[c->fc->nb_streams-1];
142  sc = st->priv_data;
143 
144  if (atom.size <= 8) return 0;
145 
146  for (i = 0; i < 3; i++) { // Parse up to three sub-atoms looking for name and data.
147  int data_size = avio_rb32(pb);
148  int tag = avio_rl32(pb);
149  int str_size = 0, skip_size = 0;
150  char *target = NULL;
151 
152  switch (tag) {
153  case MKTAG('n','a','m','e'):
154  avio_rb32(pb); // version/flags
155  str_size = skip_size = data_size - 12;
156  atom.size -= 12;
157  target = key;
158  break;
159  case MKTAG('d','a','t','a'):
160  avio_rb32(pb); // version/flags
161  avio_rb32(pb); // reserved (zero)
162  str_size = skip_size = data_size - 16;
163  atom.size -= 16;
164  target = data;
165  break;
166  default:
167  skip_size = data_size - 8;
168  str_size = 0;
169  break;
170  }
171 
172  if (target) {
173  str_size = FFMIN3(sizeof(data)-1, str_size, atom.size);
174  avio_read(pb, target, str_size);
175  target[str_size] = 0;
176  }
177  atom.size -= skip_size;
178 
179  // If we didn't read the full data chunk for the sub-atom, skip to the end of it.
180  if (skip_size > str_size) avio_skip(pb, skip_size - str_size);
181  }
182 
183  if (*key && *data) {
184  if (strcmp(key, "iTunSMPB") == 0) {
185  int priming, remainder, samples;
186  if(sscanf(data, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
187  if(priming>0 && priming<16384)
188  sc->start_pad = priming;
189  return 1;
190  }
191  }
192  if (strcmp(key, "cdec") == 0) {
193 // av_dict_set(&st->metadata, key, data, 0);
194  return 1;
195  }
196  }
197  return 0;
198 }
199 
200 static const uint32_t mac_to_unicode[128] = {
201  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
202  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
203  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
204  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
205  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
206  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
207  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
208  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
209  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
210  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
211  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
212  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
213  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
214  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
215  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
216  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
217 };
218 
219 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
220  char *dst, int dstlen)
221 {
222  char *p = dst;
223  char *end = dst+dstlen-1;
224  int i;
225 
226  for (i = 0; i < len; i++) {
227  uint8_t t, c = avio_r8(pb);
228  if (c < 0x80 && p < end)
229  *p++ = c;
230  else if (p < end)
231  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
232  }
233  *p = 0;
234  return p - dst;
235 }
236 
237 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
238 {
239  AVPacket pkt;
240  AVStream *st;
241  MOVStreamContext *sc;
242  enum AVCodecID id;
243  int ret;
244 
245  switch (type) {
246  case 0xd: id = AV_CODEC_ID_MJPEG; break;
247  case 0xe: id = AV_CODEC_ID_PNG; break;
248  case 0x1b: id = AV_CODEC_ID_BMP; break;
249  default:
250  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
251  avio_skip(pb, len);
252  return 0;
253  }
254 
255  st = avformat_new_stream(c->fc, NULL);
256  if (!st)
257  return AVERROR(ENOMEM);
258  sc = av_mallocz(sizeof(*sc));
259  if (!sc)
260  return AVERROR(ENOMEM);
261  st->priv_data = sc;
262 
263  ret = av_get_packet(pb, &pkt, len);
264  if (ret < 0)
265  return ret;
266 
267  st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
268 
269  st->attached_pic = pkt;
270  st->attached_pic.stream_index = st->index;
271  st->attached_pic.flags |= AV_PKT_FLAG_KEY;
272 
273  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
274  st->codec->codec_id = id;
275 
276  return 0;
277 }
278 
279 static int mov_metadata_raw(MOVContext *c, AVIOContext *pb,
280  unsigned len, const char *key)
281 {
282  char *value = av_malloc(len + 1);
283  if (!value)
284  return AVERROR(ENOMEM);
285  avio_read(pb, value, len);
286  value[len] = 0;
287  return av_dict_set(&c->fc->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
288 }
289 
290 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
291 {
292 #ifdef MOV_EXPORT_ALL_METADATA
293  char tmp_key[5];
294 #endif
295  char str[1024], key2[16], language[4] = {0};
296  const char *key = NULL;
297  uint16_t langcode = 0;
298  uint32_t data_type = 0, str_size;
299  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
300 
301  if (c->itunes_metadata && atom.type == MKTAG('-','-','-','-'))
302  return mov_read_custom_metadata(c, pb, atom);
303 
304  switch (atom.type) {
305  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
306  case MKTAG(0xa9,'a','u','t'):
307  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
308  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
309  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
310  case MKTAG( 'c','p','r','t'):
311  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
312  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
313  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
314  case MKTAG(0xa9,'c','m','t'):
315  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
316  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
317  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
318  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
319  case MKTAG( 'g','n','r','e'): key = "genre";
320  parse = mov_metadata_gnre; break;
321  case MKTAG(0xa9,'t','o','o'):
322  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
323  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
324  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
325  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
326  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
327  case MKTAG( 'd','e','s','c'): key = "description";break;
328  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
329  case MKTAG( 't','v','s','h'): key = "show"; break;
330  case MKTAG( 't','v','e','n'): key = "episode_id";break;
331  case MKTAG( 't','v','n','n'): key = "network"; break;
332  case MKTAG( 't','r','k','n'): key = "track";
333  parse = mov_metadata_track_or_disc_number; break;
334  case MKTAG( 'd','i','s','k'): key = "disc";
335  parse = mov_metadata_track_or_disc_number; break;
336  case MKTAG( 't','v','e','s'): key = "episode_sort";
337  parse = mov_metadata_int8_bypass_padding; break;
338  case MKTAG( 't','v','s','n'): key = "season_number";
339  parse = mov_metadata_int8_bypass_padding; break;
340  case MKTAG( 's','t','i','k'): key = "media_type";
341  parse = mov_metadata_int8_no_padding; break;
342  case MKTAG( 'h','d','v','d'): key = "hd_video";
343  parse = mov_metadata_int8_no_padding; break;
344  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
345  parse = mov_metadata_int8_no_padding; break;
346  case MKTAG( '@','P','R','M'):
347  return mov_metadata_raw(c, pb, atom.size, "premiere_version");
348  case MKTAG( '@','P','R','Q'):
349  return mov_metadata_raw(c, pb, atom.size, "quicktime_version");
350  }
351 
352  if (c->itunes_metadata && atom.size > 8) {
353  int data_size = avio_rb32(pb);
354  int tag = avio_rl32(pb);
355  if (tag == MKTAG('d','a','t','a')) {
356  data_type = avio_rb32(pb); // type
357  avio_rb32(pb); // unknown
358  str_size = data_size - 16;
359  atom.size -= 16;
360 
361  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
362  int ret = mov_read_covr(c, pb, data_type, str_size);
363  if (ret < 0) {
364  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
365  return ret;
366  }
367  }
368  } else return 0;
369  } else if (atom.size > 4 && key && !c->itunes_metadata) {
370  str_size = avio_rb16(pb); // string length
371  langcode = avio_rb16(pb);
372  ff_mov_lang_to_iso639(langcode, language);
373  atom.size -= 4;
374  } else
375  str_size = atom.size;
376 
377 #ifdef MOV_EXPORT_ALL_METADATA
378  if (!key) {
379  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
380  key = tmp_key;
381  }
382 #endif
383 
384  if (!key)
385  return 0;
386  if (atom.size < 0)
387  return AVERROR_INVALIDDATA;
388 
389  str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
390 
391  if (parse)
392  parse(c, pb, str_size, key);
393  else {
394  if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
395  mov_read_mac_string(c, pb, str_size, str, sizeof(str));
396  } else {
397  int ret = avio_read(pb, str, str_size);
398  if (ret != str_size)
399  return ret < 0 ? ret : AVERROR_INVALIDDATA;
400  str[str_size] = 0;
401  }
402  av_dict_set(&c->fc->metadata, key, str, 0);
403  if (*language && strcmp(language, "und")) {
404  snprintf(key2, sizeof(key2), "%s-%s", key, language);
405  av_dict_set(&c->fc->metadata, key2, str, 0);
406  }
407  }
408  av_dlog(c->fc, "lang \"%3s\" ", language);
409  av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
410  key, str, (char*)&atom.type, str_size, atom.size);
411 
412  return 0;
413 }
414 
415 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
416 {
417  int64_t start;
418  int i, nb_chapters, str_len, version;
419  char str[256+1];
420 
421  if ((atom.size -= 5) < 0)
422  return 0;
423 
424  version = avio_r8(pb);
425  avio_rb24(pb);
426  if (version)
427  avio_rb32(pb); // ???
428  nb_chapters = avio_r8(pb);
429 
430  for (i = 0; i < nb_chapters; i++) {
431  if (atom.size < 9)
432  return 0;
433 
434  start = avio_rb64(pb);
435  str_len = avio_r8(pb);
436 
437  if ((atom.size -= 9+str_len) < 0)
438  return 0;
439 
440  avio_read(pb, str, str_len);
441  str[str_len] = 0;
442  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
443  }
444  return 0;
445 }
446 
447 #define MIN_DATA_ENTRY_BOX_SIZE 12
448 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
449 {
450  AVStream *st;
451  MOVStreamContext *sc;
452  int entries, i, j;
453 
454  if (c->fc->nb_streams < 1)
455  return 0;
456  st = c->fc->streams[c->fc->nb_streams-1];
457  sc = st->priv_data;
458 
459  avio_rb32(pb); // version + flags
460  entries = avio_rb32(pb);
461  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
462  entries >= UINT_MAX / sizeof(*sc->drefs))
463  return AVERROR_INVALIDDATA;
464  av_free(sc->drefs);
465  sc->drefs_count = 0;
466  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
467  if (!sc->drefs)
468  return AVERROR(ENOMEM);
469  sc->drefs_count = entries;
470 
471  for (i = 0; i < sc->drefs_count; i++) {
472  MOVDref *dref = &sc->drefs[i];
473  uint32_t size = avio_rb32(pb);
474  int64_t next = avio_tell(pb) + size - 4;
475 
476  if (size < 12)
477  return AVERROR_INVALIDDATA;
478 
479  dref->type = avio_rl32(pb);
480  avio_rb32(pb); // version + flags
481  av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
482 
483  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
484  /* macintosh alias record */
485  uint16_t volume_len, len;
486  int16_t type;
487 
488  avio_skip(pb, 10);
489 
490  volume_len = avio_r8(pb);
491  volume_len = FFMIN(volume_len, 27);
492  avio_read(pb, dref->volume, 27);
493  dref->volume[volume_len] = 0;
494  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
495 
496  avio_skip(pb, 12);
497 
498  len = avio_r8(pb);
499  len = FFMIN(len, 63);
500  avio_read(pb, dref->filename, 63);
501  dref->filename[len] = 0;
502  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
503 
504  avio_skip(pb, 16);
505 
506  /* read next level up_from_alias/down_to_target */
507  dref->nlvl_from = avio_rb16(pb);
508  dref->nlvl_to = avio_rb16(pb);
509  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
510  dref->nlvl_from, dref->nlvl_to);
511 
512  avio_skip(pb, 16);
513 
514  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
515  if(url_feof(pb))
516  return AVERROR_EOF;
517  type = avio_rb16(pb);
518  len = avio_rb16(pb);
519  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
520  if (len&1)
521  len += 1;
522  if (type == 2) { // absolute path
523  av_free(dref->path);
524  dref->path = av_mallocz(len+1);
525  if (!dref->path)
526  return AVERROR(ENOMEM);
527  avio_read(pb, dref->path, len);
528  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
529  len -= volume_len;
530  memmove(dref->path, dref->path+volume_len, len);
531  dref->path[len] = 0;
532  }
533  for (j = 0; j < len; j++)
534  if (dref->path[j] == ':')
535  dref->path[j] = '/';
536  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
537  } else if (type == 0) { // directory name
538  av_free(dref->dir);
539  dref->dir = av_malloc(len+1);
540  if (!dref->dir)
541  return AVERROR(ENOMEM);
542  if (avio_read(pb, dref->dir, len) != len)
543  return AVERROR_INVALIDDATA;
544  dref->dir[len] = 0;
545  for (j = 0; j < len; j++)
546  if (dref->dir[j] == ':')
547  dref->dir[j] = '/';
548  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
549  } else
550  avio_skip(pb, len);
551  }
552  }
553  avio_seek(pb, next, SEEK_SET);
554  }
555  return 0;
556 }
557 
558 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
559 {
560  AVStream *st;
561  uint32_t type;
562  uint32_t av_unused ctype;
563  int title_size;
564  char *title_str;
565 
566  if (c->fc->nb_streams < 1) // meta before first trak
567  return 0;
568 
569  st = c->fc->streams[c->fc->nb_streams-1];
570 
571  avio_r8(pb); /* version */
572  avio_rb24(pb); /* flags */
573 
574  /* component type */
575  ctype = avio_rl32(pb);
576  type = avio_rl32(pb); /* component subtype */
577 
578  av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
579  av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
580 
581  if (type == MKTAG('v','i','d','e'))
582  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
583  else if (type == MKTAG('s','o','u','n'))
584  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
585  else if (type == MKTAG('m','1','a',' '))
586  st->codec->codec_id = AV_CODEC_ID_MP2;
587  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
588  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
589 
590  avio_rb32(pb); /* component manufacture */
591  avio_rb32(pb); /* component flags */
592  avio_rb32(pb); /* component flags mask */
593 
594  title_size = atom.size - 24;
595  if (title_size > 0) {
596  title_str = av_malloc(title_size + 1); /* Add null terminator */
597  if (!title_str)
598  return AVERROR(ENOMEM);
599  avio_read(pb, title_str, title_size);
600  title_str[title_size] = 0;
601  if (title_str[0])
602  av_dict_set(&st->metadata, "handler_name", title_str +
603  (!c->isom && title_str[0] == title_size - 1), 0);
604  av_freep(&title_str);
605  }
606 
607  return 0;
608 }
609 
610 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
611 {
612  AVStream *st;
613  int tag;
614 
615  if (fc->nb_streams < 1)
616  return 0;
617  st = fc->streams[fc->nb_streams-1];
618 
619  avio_rb32(pb); /* version + flags */
620  ff_mp4_read_descr(fc, pb, &tag);
621  if (tag == MP4ESDescrTag) {
622  ff_mp4_parse_es_descr(pb, NULL);
623  } else
624  avio_rb16(pb); /* ID */
625 
626  ff_mp4_read_descr(fc, pb, &tag);
627  if (tag == MP4DecConfigDescrTag)
628  ff_mp4_read_dec_config_descr(fc, st, pb);
629  return 0;
630 }
631 
632 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
633 {
634  return ff_mov_read_esds(c->fc, pb, atom);
635 }
636 
637 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
638 {
639  AVStream *st;
640  int ac3info, acmod, lfeon, bsmod;
641 
642  if (c->fc->nb_streams < 1)
643  return 0;
644  st = c->fc->streams[c->fc->nb_streams-1];
645 
646  ac3info = avio_rb24(pb);
647  bsmod = (ac3info >> 14) & 0x7;
648  acmod = (ac3info >> 11) & 0x7;
649  lfeon = (ac3info >> 10) & 0x1;
650  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
651  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
652  if (lfeon)
653  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
654  st->codec->audio_service_type = bsmod;
655  if (st->codec->channels > 1 && bsmod == 0x7)
656  st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
657 
658  return 0;
659 }
660 
661 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
662 {
663  AVStream *st;
664  int eac3info, acmod, lfeon, bsmod;
665 
666  if (c->fc->nb_streams < 1)
667  return 0;
668  st = c->fc->streams[c->fc->nb_streams-1];
669 
670  /* No need to parse fields for additional independent substreams and its
671  * associated dependent substreams since libavcodec's E-AC-3 decoder
672  * does not support them yet. */
673  avio_rb16(pb); /* data_rate and num_ind_sub */
674  eac3info = avio_rb24(pb);
675  bsmod = (eac3info >> 12) & 0x1f;
676  acmod = (eac3info >> 9) & 0x7;
677  lfeon = (eac3info >> 8) & 0x1;
678  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
679  if (lfeon)
680  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
681  st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
682  st->codec->audio_service_type = bsmod;
683  if (st->codec->channels > 1 && bsmod == 0x7)
684  st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
685 
686  return 0;
687 }
688 
689 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
690 {
691  AVStream *st;
692 
693  if (c->fc->nb_streams < 1)
694  return 0;
695  st = c->fc->streams[c->fc->nb_streams-1];
696 
697  if (atom.size < 16)
698  return 0;
699 
700  /* skip version and flags */
701  avio_skip(pb, 4);
702 
703  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
704 
705  return 0;
706 }
707 
708 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
709 {
710  AVStream *st;
711 
712  if (c->fc->nb_streams < 1)
713  return 0;
714  st = c->fc->streams[c->fc->nb_streams-1];
715 
716  if (ff_get_wav_header(pb, st->codec, atom.size) < 0) {
717  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
718  }
719 
720  return 0;
721 }
722 
723 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
724 {
725  const int num = avio_rb32(pb);
726  const int den = avio_rb32(pb);
727  AVStream *st;
728 
729  if (c->fc->nb_streams < 1)
730  return 0;
731  st = c->fc->streams[c->fc->nb_streams-1];
732 
733  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
734  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
735  av_log(c->fc, AV_LOG_WARNING,
736  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
737  st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
738  num, den);
739  } else if (den != 0) {
740  st->sample_aspect_ratio.num = num;
741  st->sample_aspect_ratio.den = den;
742  }
743  return 0;
744 }
745 
746 /* this atom contains actual media data */
747 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
748 {
749  if (atom.size == 0) /* wrong one (MP4) */
750  return 0;
751  c->found_mdat=1;
752  return 0; /* now go for moov */
753 }
754 
755 /* read major brand, minor version and compatible brands and store them as metadata */
756 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
757 {
758  uint32_t minor_ver;
759  int comp_brand_size;
760  char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
761  char* comp_brands_str;
762  uint8_t type[5] = {0};
763 
764  avio_read(pb, type, 4);
765  if (strcmp(type, "qt "))
766  c->isom = 1;
767  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
768  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
769  minor_ver = avio_rb32(pb); /* minor version */
770  snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
771  av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
772 
773  comp_brand_size = atom.size - 8;
774  if (comp_brand_size < 0)
775  return AVERROR_INVALIDDATA;
776  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
777  if (!comp_brands_str)
778  return AVERROR(ENOMEM);
779  avio_read(pb, comp_brands_str, comp_brand_size);
780  comp_brands_str[comp_brand_size] = 0;
781  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
782  av_freep(&comp_brands_str);
783 
784  return 0;
785 }
786 
787 /* this atom should contain all header atoms */
788 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
789 {
790  int ret;
791 
792  if (c->found_moov) {
793  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
794  avio_skip(pb, atom.size);
795  return 0;
796  }
797 
798  if ((ret = mov_read_default(c, pb, atom)) < 0)
799  return ret;
800  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
801  /* so we don't parse the whole file if over a network */
802  c->found_moov=1;
803  return 0; /* now go for mdat */
804 }
805 
806 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
807 {
808  c->fragment.moof_offset = avio_tell(pb) - 8;
809  av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
810  return mov_read_default(c, pb, atom);
811 }
812 
813 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
814 {
815  char buffer[32];
816  if (time) {
817  struct tm *ptm;
818  time_t timet;
819  if(time >= 2082844800)
820  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
821  timet = time;
822  ptm = gmtime(&timet);
823  if (!ptm) return;
824  strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
825  av_dict_set(metadata, "creation_time", buffer, 0);
826  }
827 }
828 
829 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
830 {
831  AVStream *st;
832  MOVStreamContext *sc;
833  int version;
834  char language[4] = {0};
835  unsigned lang;
836  int64_t creation_time;
837 
838  if (c->fc->nb_streams < 1)
839  return 0;
840  st = c->fc->streams[c->fc->nb_streams-1];
841  sc = st->priv_data;
842 
843  if (sc->time_scale) {
844  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
845  return AVERROR_INVALIDDATA;
846  }
847 
848  version = avio_r8(pb);
849  if (version > 1) {
850  avpriv_request_sample(c->fc, "Version %d", version);
851  return AVERROR_PATCHWELCOME;
852  }
853  avio_rb24(pb); /* flags */
854  if (version == 1) {
855  creation_time = avio_rb64(pb);
856  avio_rb64(pb);
857  } else {
858  creation_time = avio_rb32(pb);
859  avio_rb32(pb); /* modification time */
860  }
861  mov_metadata_creation_time(&st->metadata, creation_time);
862 
863  sc->time_scale = avio_rb32(pb);
864  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
865 
866  lang = avio_rb16(pb); /* language */
867  if (ff_mov_lang_to_iso639(lang, language))
868  av_dict_set(&st->metadata, "language", language, 0);
869  avio_rb16(pb); /* quality */
870 
871  return 0;
872 }
873 
874 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
875 {
876  int64_t creation_time;
877  int version = avio_r8(pb); /* version */
878  avio_rb24(pb); /* flags */
879 
880  if (version == 1) {
881  creation_time = avio_rb64(pb);
882  avio_rb64(pb);
883  } else {
884  creation_time = avio_rb32(pb);
885  avio_rb32(pb); /* modification time */
886  }
887  mov_metadata_creation_time(&c->fc->metadata, creation_time);
888  c->time_scale = avio_rb32(pb); /* time scale */
889 
890  av_dlog(c->fc, "time scale = %i\n", c->time_scale);
891 
892  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
893  // set the AVCodecContext duration because the duration of individual tracks
894  // may be inaccurate
895  if (c->time_scale > 0 && !c->trex_data)
896  c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
897  avio_rb32(pb); /* preferred scale */
898 
899  avio_rb16(pb); /* preferred volume */
900 
901  avio_skip(pb, 10); /* reserved */
902 
903  avio_skip(pb, 36); /* display matrix */
904 
905  avio_rb32(pb); /* preview time */
906  avio_rb32(pb); /* preview duration */
907  avio_rb32(pb); /* poster time */
908  avio_rb32(pb); /* selection time */
909  avio_rb32(pb); /* selection duration */
910  avio_rb32(pb); /* current time */
911  avio_rb32(pb); /* next track ID */
912  return 0;
913 }
914 
915 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
916 {
917  AVStream *st;
918  int little_endian;
919 
920  if (c->fc->nb_streams < 1)
921  return 0;
922  st = c->fc->streams[c->fc->nb_streams-1];
923 
924  little_endian = avio_rb16(pb) & 0xFF;
925  av_dlog(c->fc, "enda %d\n", little_endian);
926  if (little_endian == 1) {
927  switch (st->codec->codec_id) {
928  case AV_CODEC_ID_PCM_S24BE:
929  st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
930  break;
931  case AV_CODEC_ID_PCM_S32BE:
932  st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
933  break;
934  case AV_CODEC_ID_PCM_F32BE:
935  st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
936  break;
937  case AV_CODEC_ID_PCM_F64BE:
938  st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
939  break;
940  default:
941  break;
942  }
943  }
944  return 0;
945 }
946 
947 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
948 {
949  AVStream *st;
950  unsigned mov_field_order;
951  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
952 
953  if (c->fc->nb_streams < 1) // will happen with jp2 files
954  return 0;
955  st = c->fc->streams[c->fc->nb_streams-1];
956  if (atom.size < 2)
957  return AVERROR_INVALIDDATA;
958  mov_field_order = avio_rb16(pb);
959  if ((mov_field_order & 0xFF00) == 0x0100)
960  decoded_field_order = AV_FIELD_PROGRESSIVE;
961  else if ((mov_field_order & 0xFF00) == 0x0200) {
962  switch (mov_field_order & 0xFF) {
963  case 0x01: decoded_field_order = AV_FIELD_TT;
964  break;
965  case 0x06: decoded_field_order = AV_FIELD_BB;
966  break;
967  case 0x09: decoded_field_order = AV_FIELD_TB;
968  break;
969  case 0x0E: decoded_field_order = AV_FIELD_BT;
970  break;
971  }
972  }
973  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
974  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
975  }
976  st->codec->field_order = decoded_field_order;
977 
978  return 0;
979 }
980 
981 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
982 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
983  enum AVCodecID codec_id)
984 {
985  AVStream *st;
986  uint64_t size;
987  uint8_t *buf;
988  int err;
989 
990  if (c->fc->nb_streams < 1) // will happen with jp2 files
991  return 0;
992  st= c->fc->streams[c->fc->nb_streams-1];
993 
994  if (st->codec->codec_id != codec_id)
995  return 0; /* unexpected codec_id - don't mess with extradata */
996 
997  size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
998  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
999  return AVERROR_INVALIDDATA;
1000  if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
1001  st->codec->extradata_size = 0;
1002  return err;
1003  }
1004  buf = st->codec->extradata + st->codec->extradata_size;
1005  st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
1006  AV_WB32( buf , atom.size + 8);
1007  AV_WL32( buf + 4, atom.type);
1008  err = avio_read(pb, buf + 8, atom.size);
1009  if (err < 0) {
1010  return err;
1011  } else if (err < atom.size) {
1012  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1013  st->codec->extradata_size -= atom.size - err;
1014  }
1015  memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1016  return 0;
1017 }
1018 
1019 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1020 static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1021 {
1022  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1023 }
1024 
1025 static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1026 {
1027  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1028 }
1029 
1030 static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1031 {
1032  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1033 }
1034 
1035 static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1036 {
1037  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1038 }
1039 
1040 static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1041 {
1042  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1043 
1044  if (!ret && c->fc->nb_streams >= 1) {
1045  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1046  if (avctx->extradata_size >= 40) {
1047  avctx->height = AV_RB16(&avctx->extradata[36]);
1048  avctx->width = AV_RB16(&avctx->extradata[38]);
1049  }
1050  }
1051  return ret;
1052 }
1053 
1054 static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1055 {
1056  if (c->fc->nb_streams >= 1) {
1057  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1058  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1059  codec->codec_id == AV_CODEC_ID_H264 &&
1060  atom.size > 11) {
1061  avio_skip(pb, 10);
1062  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1063  if (avio_rb16(pb) == 0xd4d)
1064  codec->width = 1440;
1065  return 0;
1066  }
1067  }
1068 
1069  return mov_read_avid(c, pb, atom);
1070 }
1071 
1072 static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1073 {
1074  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1075 }
1076 
1077 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1078 {
1079  AVStream *st;
1080 
1081  if (c->fc->nb_streams < 1)
1082  return 0;
1083  st = c->fc->streams[c->fc->nb_streams-1];
1084 
1085  if ((uint64_t)atom.size > (1<<30))
1086  return AVERROR_INVALIDDATA;
1087 
1088  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1089  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1090  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1091  // pass all frma atom to codec, needed at least for QDMC and QDM2
1092  av_free(st->codec->extradata);
1093  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1094  return AVERROR(ENOMEM);
1095  } else if (atom.size > 8) { /* to read frma, esds atoms */
1096  int ret;
1097  if ((ret = mov_read_default(c, pb, atom)) < 0)
1098  return ret;
1099  } else
1100  avio_skip(pb, atom.size);
1101  return 0;
1102 }
1103 
1104 /**
1105  * This function reads atom content and puts data in extradata without tag
1106  * nor size unlike mov_read_extradata.
1107  */
1108 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1109 {
1110  AVStream *st;
1111 
1112  if (c->fc->nb_streams < 1)
1113  return 0;
1114  st = c->fc->streams[c->fc->nb_streams-1];
1115 
1116  if ((uint64_t)atom.size > (1<<30))
1117  return AVERROR_INVALIDDATA;
1118 
1119  if (atom.size >= 10) {
1120  // Broken files created by legacy versions of libavformat will
1121  // wrap a whole fiel atom inside of a glbl atom.
1122  unsigned size = avio_rb32(pb);
1123  unsigned type = avio_rl32(pb);
1124  avio_seek(pb, -8, SEEK_CUR);
1125  if (type == MKTAG('f','i','e','l') && size == atom.size)
1126  return mov_read_default(c, pb, atom);
1127  }
1128  av_free(st->codec->extradata);
1129  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1130  return AVERROR(ENOMEM);
1131 
1132  return 0;
1133 }
1134 
1135 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1136 {
1137  AVStream *st;
1138  uint8_t profile_level;
1139  int ret;
1140 
1141  if (c->fc->nb_streams < 1)
1142  return 0;
1143  st = c->fc->streams[c->fc->nb_streams-1];
1144 
1145  if (atom.size >= (1<<28) || atom.size < 7)
1146  return AVERROR_INVALIDDATA;
1147 
1148  profile_level = avio_r8(pb);
1149  if ((profile_level & 0xf0) != 0xc0)
1150  return 0;
1151 
1152  avio_seek(pb, 6, SEEK_CUR);
1153  av_free(st->codec->extradata);
1154  if ((ret = ff_get_extradata(st->codec, pb, atom.size - 7)) < 0)
1155  return ret;
1156 
1157  return 0;
1158 }
1159 
1160 /**
1161  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1162  * but can have extradata appended at the end after the 40 bytes belonging
1163  * to the struct.
1164  */
1165 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1166 {
1167  AVStream *st;
1168 
1169  if (c->fc->nb_streams < 1)
1170  return 0;
1171  if (atom.size <= 40)
1172  return 0;
1173  st = c->fc->streams[c->fc->nb_streams-1];
1174 
1175  if ((uint64_t)atom.size > (1<<30))
1176  return AVERROR_INVALIDDATA;
1177 
1178  avio_skip(pb, 40);
1179  av_free(st->codec->extradata);
1180  if (ff_get_extradata(st->codec, pb, atom.size - 40) < 0)
1181  return AVERROR(ENOMEM);
1182  return 0;
1183 }
1184 
1185 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1186 {
1187  AVStream *st;
1188  MOVStreamContext *sc;
1189  unsigned int i, entries;
1190 
1191  if (c->fc->nb_streams < 1)
1192  return 0;
1193  st = c->fc->streams[c->fc->nb_streams-1];
1194  sc = st->priv_data;
1195 
1196  avio_r8(pb); /* version */
1197  avio_rb24(pb); /* flags */
1198 
1199  entries = avio_rb32(pb);
1200 
1201  if (!entries)
1202  return 0;
1203  if (entries >= UINT_MAX/sizeof(int64_t))
1204  return AVERROR_INVALIDDATA;
1205 
1206  sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1207  if (!sc->chunk_offsets)
1208  return AVERROR(ENOMEM);
1209  sc->chunk_count = entries;
1210 
1211  if (atom.type == MKTAG('s','t','c','o'))
1212  for (i = 0; i < entries && !pb->eof_reached; i++)
1213  sc->chunk_offsets[i] = avio_rb32(pb);
1214  else if (atom.type == MKTAG('c','o','6','4'))
1215  for (i = 0; i < entries && !pb->eof_reached; i++)
1216  sc->chunk_offsets[i] = avio_rb64(pb);
1217  else
1218  return AVERROR_INVALIDDATA;
1219 
1220  sc->chunk_count = i;
1221 
1222  if (pb->eof_reached)
1223  return AVERROR_EOF;
1224 
1225  return 0;
1226 }
1227 
1228 /**
1229  * Compute codec id for 'lpcm' tag.
1230  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1231  */
1232 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1233 {
1234  /* lpcm flags:
1235  * 0x1 = float
1236  * 0x2 = big-endian
1237  * 0x4 = signed
1238  */
1239  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1240 }
1241 
1242 static int mov_codec_id(AVStream *st, uint32_t format)
1243 {
1244  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1245 
1246  if (id <= 0 &&
1247  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1248  (format & 0xFFFF) == 'T' + ('S' << 8)))
1249  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1250 
1251  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1252  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1253  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1254  /* skip old asf mpeg4 tag */
1255  format && format != MKTAG('m','p','4','s')) {
1256  id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1257  if (id <= 0)
1258  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1259  if (id > 0)
1260  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1261  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1262  (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1263  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1264  id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1265  if (id > 0)
1266  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1267  }
1268  }
1269 
1270  st->codec->codec_tag = format;
1271 
1272  return id;
1273 }
1274 
1275 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1276  AVStream *st, MOVStreamContext *sc)
1277 {
1278  unsigned int color_depth, len, j;
1279  int color_greyscale;
1280  int color_table_id;
1281 
1282  avio_rb16(pb); /* version */
1283  avio_rb16(pb); /* revision level */
1284  avio_rb32(pb); /* vendor */
1285  avio_rb32(pb); /* temporal quality */
1286  avio_rb32(pb); /* spatial quality */
1287 
1288  st->codec->width = avio_rb16(pb); /* width */
1289  st->codec->height = avio_rb16(pb); /* height */
1290 
1291  avio_rb32(pb); /* horiz resolution */
1292  avio_rb32(pb); /* vert resolution */
1293  avio_rb32(pb); /* data size, always 0 */
1294  avio_rb16(pb); /* frames per samples */
1295 
1296  len = avio_r8(pb); /* codec name, pascal string */
1297  if (len > 31)
1298  len = 31;
1299  mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1300  if (len < 31)
1301  avio_skip(pb, 31 - len);
1302  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1303  if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1304  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1305  st->codec->width &= ~1;
1306  st->codec->height &= ~1;
1307  }
1308  /* Flash Media Server uses tag H263 with Sorenson Spark */
1309  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1310  !memcmp(st->codec->codec_name, "Sorenson H263", 13))
1311  st->codec->codec_id = AV_CODEC_ID_FLV1;
1312 
1313  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1314  color_table_id = avio_rb16(pb); /* colortable id */
1315  av_dlog(c->fc, "depth %d, ctab id %d\n",
1316  st->codec->bits_per_coded_sample, color_table_id);
1317  /* figure out the palette situation */
1318  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1319  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1320  /* Do not create a greyscale palette for cinepak */
1321  if (color_greyscale && st->codec->codec_id == AV_CODEC_ID_CINEPAK)
1322  return;
1323 
1324  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1325  if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1326  /* for palette traversal */
1327  unsigned int color_start, color_count, color_end;
1328  unsigned char a, r, g, b;
1329 
1330  if (color_greyscale) {
1331  int color_index, color_dec;
1332  /* compute the greyscale palette */
1333  st->codec->bits_per_coded_sample = color_depth;
1334  color_count = 1 << color_depth;
1335  color_index = 255;
1336  color_dec = 256 / (color_count - 1);
1337  for (j = 0; j < color_count; j++) {
1338  r = g = b = color_index;
1339  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1340  color_index -= color_dec;
1341  if (color_index < 0)
1342  color_index = 0;
1343  }
1344  } else if (color_table_id) {
1345  const uint8_t *color_table;
1346  /* if flag bit 3 is set, use the default palette */
1347  color_count = 1 << color_depth;
1348  if (color_depth == 2)
1349  color_table = ff_qt_default_palette_4;
1350  else if (color_depth == 4)
1351  color_table = ff_qt_default_palette_16;
1352  else
1353  color_table = ff_qt_default_palette_256;
1354 
1355  for (j = 0; j < color_count; j++) {
1356  r = color_table[j * 3 + 0];
1357  g = color_table[j * 3 + 1];
1358  b = color_table[j * 3 + 2];
1359  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1360  }
1361  } else {
1362  /* load the palette from the file */
1363  color_start = avio_rb32(pb);
1364  color_count = avio_rb16(pb);
1365  color_end = avio_rb16(pb);
1366  if ((color_start <= 255) && (color_end <= 255)) {
1367  for (j = color_start; j <= color_end; j++) {
1368  /* each A, R, G, or B component is 16 bits;
1369  * only use the top 8 bits */
1370  a = avio_r8(pb);
1371  avio_r8(pb);
1372  r = avio_r8(pb);
1373  avio_r8(pb);
1374  g = avio_r8(pb);
1375  avio_r8(pb);
1376  b = avio_r8(pb);
1377  avio_r8(pb);
1378  sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1379  }
1380  }
1381  }
1382  sc->has_palette = 1;
1383  }
1384 }
1385 
1386 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1387  AVStream *st, MOVStreamContext *sc)
1388 {
1389  int bits_per_sample, flags;
1390  uint16_t version = avio_rb16(pb);
1391  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1392 
1393  avio_rb16(pb); /* revision level */
1394  avio_rb32(pb); /* vendor */
1395 
1396  st->codec->channels = avio_rb16(pb); /* channel count */
1397  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1398  av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1399 
1400  sc->audio_cid = avio_rb16(pb);
1401  avio_rb16(pb); /* packet size = 0 */
1402 
1403  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1404 
1405  // Read QT version 1 fields. In version 0 these do not exist.
1406  av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
1407  if (!c->isom ||
1408  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1409 
1410  if (version == 1) {
1411  sc->samples_per_frame = avio_rb32(pb);
1412  avio_rb32(pb); /* bytes per packet */
1413  sc->bytes_per_frame = avio_rb32(pb);
1414  avio_rb32(pb); /* bytes per sample */
1415  } else if (version == 2) {
1416  avio_rb32(pb); /* sizeof struct only */
1417  st->codec->sample_rate = av_int2double(avio_rb64(pb));
1418  st->codec->channels = avio_rb32(pb);
1419  avio_rb32(pb); /* always 0x7F000000 */
1420  st->codec->bits_per_coded_sample = avio_rb32(pb);
1421 
1422  flags = avio_rb32(pb); /* lpcm format specific flag */
1423  sc->bytes_per_frame = avio_rb32(pb);
1424  sc->samples_per_frame = avio_rb32(pb);
1425  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1426  st->codec->codec_id =
1427  ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
1428  flags);
1429  }
1430  }
1431 
1432  switch (st->codec->codec_id) {
1433  case AV_CODEC_ID_PCM_S8:
1434  case AV_CODEC_ID_PCM_U8:
1435  if (st->codec->bits_per_coded_sample == 16)
1436  st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1437  break;
1438  case AV_CODEC_ID_PCM_S16LE:
1439  case AV_CODEC_ID_PCM_S16BE:
1440  if (st->codec->bits_per_coded_sample == 8)
1441  st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1442  else if (st->codec->bits_per_coded_sample == 24)
1443  st->codec->codec_id =
1444  st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1445  AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1446  break;
1447  /* set values for old format before stsd version 1 appeared */
1448  case AV_CODEC_ID_MACE3:
1449  sc->samples_per_frame = 6;
1450  sc->bytes_per_frame = 2 * st->codec->channels;
1451  break;
1452  case AV_CODEC_ID_MACE6:
1453  sc->samples_per_frame = 6;
1454  sc->bytes_per_frame = 1 * st->codec->channels;
1455  break;
1456  case AV_CODEC_ID_ADPCM_IMA_QT:
1457  sc->samples_per_frame = 64;
1458  sc->bytes_per_frame = 34 * st->codec->channels;
1459  break;
1460  case AV_CODEC_ID_GSM:
1461  sc->samples_per_frame = 160;
1462  sc->bytes_per_frame = 33;
1463  break;
1464  default:
1465  break;
1466  }
1467 
1468  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1469  if (bits_per_sample) {
1470  st->codec->bits_per_coded_sample = bits_per_sample;
1471  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1472  }
1473 }
1474 
1475 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
1476  AVStream *st, MOVStreamContext *sc,
1477  int size)
1478 {
1479  // ttxt stsd contains display flags, justification, background
1480  // color, fonts, and default styles, so fake an atom to read it
1481  MOVAtom fake_atom = { .size = size };
1482  // mp4s contains a regular esds atom
1483  if (st->codec->codec_tag != AV_RL32("mp4s"))
1484  mov_read_glbl(c, pb, fake_atom);
1485  st->codec->width = sc->width;
1486  st->codec->height = sc->height;
1487 }
1488 
1489 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
1490  AVStream *st, MOVStreamContext *sc,
1491  int size)
1492 {
1493  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1494  if (ff_get_extradata(st->codec, pb, size) < 0)
1495  return AVERROR(ENOMEM);
1496  if (size > 16) {
1497  MOVStreamContext *tmcd_ctx = st->priv_data;
1498  int val;
1499  val = AV_RB32(st->codec->extradata + 4);
1500  tmcd_ctx->tmcd_flags = val;
1501  if (val & 1)
1502  st->codec->flags2 |= CODEC_FLAG2_DROP_FRAME_TIMECODE;
1503  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1504  st->codec->time_base.num = 1;
1505  }
1506  } else {
1507  /* other codec type, just skip (rtp, mp4s ...) */
1508  avio_skip(pb, size);
1509  }
1510  return 0;
1511 }
1512 
1513 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
1514  AVStream *st, MOVStreamContext *sc)
1515 {
1516  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1517  !st->codec->sample_rate && sc->time_scale > 1)
1518  st->codec->sample_rate = sc->time_scale;
1519 
1520  /* special codec parameters handling */
1521  switch (st->codec->codec_id) {
1522 #if CONFIG_DV_DEMUXER
1523  case AV_CODEC_ID_DVAUDIO:
1524  c->dv_fctx = avformat_alloc_context();
1525  c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1526  if (!c->dv_demux) {
1527  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1528  return AVERROR(ENOMEM);
1529  }
1530  sc->dv_audio_container = 1;
1531  st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1532  break;
1533 #endif
1534  /* no ifdef since parameters are always those */
1535  case AV_CODEC_ID_QCELP:
1536  st->codec->channels = 1;
1537  // force sample rate for qcelp when not stored in mov
1538  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1539  st->codec->sample_rate = 8000;
1540  // FIXME: Why is the following needed for some files?
1541  sc->samples_per_frame = 160;
1542  if (!sc->bytes_per_frame)
1543  sc->bytes_per_frame = 35;
1544  break;
1545  case AV_CODEC_ID_AMR_NB:
1546  st->codec->channels = 1;
1547  /* force sample rate for amr, stsd in 3gp does not store sample rate */
1548  st->codec->sample_rate = 8000;
1549  break;
1550  case AV_CODEC_ID_AMR_WB:
1551  st->codec->channels = 1;
1552  st->codec->sample_rate = 16000;
1553  break;
1554  case AV_CODEC_ID_MP2:
1555  case AV_CODEC_ID_MP3:
1556  /* force type after stsd for m1a hdlr */
1557  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1558  st->need_parsing = AVSTREAM_PARSE_FULL;
1559  break;
1560  case AV_CODEC_ID_GSM:
1561  case AV_CODEC_ID_ADPCM_MS:
1562  case AV_CODEC_ID_ADPCM_IMA_WAV:
1563  case AV_CODEC_ID_ILBC:
1564  case AV_CODEC_ID_MACE3:
1565  case AV_CODEC_ID_MACE6:
1566  case AV_CODEC_ID_QDM2:
1567  st->codec->block_align = sc->bytes_per_frame;
1568  break;
1569  case AV_CODEC_ID_ALAC:
1570  if (st->codec->extradata_size == 36) {
1571  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1572  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1573  }
1574  break;
1575  case AV_CODEC_ID_AC3:
1576  case AV_CODEC_ID_MPEG1VIDEO:
1577  case AV_CODEC_ID_VC1:
1578  st->need_parsing = AVSTREAM_PARSE_FULL;
1579  break;
1580  default:
1581  break;
1582  }
1583  return 0;
1584 }
1585 
1586 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
1587  int codec_tag, int format,
1588  int size)
1589 {
1590  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1591 
1592  if (codec_tag &&
1593  (codec_tag != format &&
1594  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1595  : codec_tag != MKTAG('j','p','e','g')))) {
1596  /* Multiple fourcc, we skip JPEG. This is not correct, we should
1597  * export it as a separate AVStream but this needs a few changes
1598  * in the MOV demuxer, patch welcome. */
1599 
1600  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1601  avio_skip(pb, size);
1602  return 1;
1603  }
1604  if ( codec_tag == AV_RL32("avc1") ||
1605  codec_tag == AV_RL32("hvc1") ||
1606  codec_tag == AV_RL32("hev1")
1607  )
1608  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
1609 
1610  return 0;
1611 }
1612 
1613 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1614 {
1615  AVStream *st;
1616  MOVStreamContext *sc;
1617  int pseudo_stream_id;
1618 
1619  if (c->fc->nb_streams < 1)
1620  return 0;
1621  st = c->fc->streams[c->fc->nb_streams-1];
1622  sc = st->priv_data;
1623 
1624  for (pseudo_stream_id = 0;
1625  pseudo_stream_id < entries && !pb->eof_reached;
1626  pseudo_stream_id++) {
1627  //Parsing Sample description table
1628  enum AVCodecID id;
1629  int ret, dref_id = 1;
1630  MOVAtom a = { AV_RL32("stsd") };
1631  int64_t start_pos = avio_tell(pb);
1632  int64_t size = avio_rb32(pb); /* size */
1633  uint32_t format = avio_rl32(pb); /* data format */
1634 
1635  if (size >= 16) {
1636  avio_rb32(pb); /* reserved */
1637  avio_rb16(pb); /* reserved */
1638  dref_id = avio_rb16(pb);
1639  }else if (size <= 7){
1640  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1641  return AVERROR_INVALIDDATA;
1642  }
1643 
1644  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1645  size - (avio_tell(pb) - start_pos)))
1646  continue;
1647 
1648  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1649  sc->dref_id= dref_id;
1650 
1651  id = mov_codec_id(st, format);
1652 
1653  av_dlog(c->fc, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1654  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1655  (format >> 24) & 0xff, st->codec->codec_type);
1656 
1657  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1658  st->codec->codec_id = id;
1659  mov_parse_stsd_video(c, pb, st, sc);
1660  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1661  st->codec->codec_id = id;
1662  mov_parse_stsd_audio(c, pb, st, sc);
1663  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1664  st->codec->codec_id = id;
1665  mov_parse_stsd_subtitle(c, pb, st, sc,
1666  size - (avio_tell(pb) - start_pos));
1667  } else {
1668  ret = mov_parse_stsd_data(c, pb, st, sc,
1669  size - (avio_tell(pb) - start_pos));
1670  if (ret < 0)
1671  return ret;
1672  }
1673  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1674  a.size = size - (avio_tell(pb) - start_pos);
1675  if (a.size > 8) {
1676  if ((ret = mov_read_default(c, pb, a)) < 0)
1677  return ret;
1678  } else if (a.size > 0)
1679  avio_skip(pb, a.size);
1680  }
1681 
1682  if (pb->eof_reached)
1683  return AVERROR_EOF;
1684 
1685  return mov_finalize_stsd_codec(c, pb, st, sc);
1686 }
1687 
1688 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1689 {
1690  int entries;
1691 
1692  avio_r8(pb); /* version */
1693  avio_rb24(pb); /* flags */
1694  entries = avio_rb32(pb);
1695 
1696  return ff_mov_read_stsd_entries(c, pb, entries);
1697 }
1698 
1699 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1700 {
1701  AVStream *st;
1702  MOVStreamContext *sc;
1703  unsigned int i, entries;
1704 
1705  if (c->fc->nb_streams < 1)
1706  return 0;
1707  st = c->fc->streams[c->fc->nb_streams-1];
1708  sc = st->priv_data;
1709 
1710  avio_r8(pb); /* version */
1711  avio_rb24(pb); /* flags */
1712 
1713  entries = avio_rb32(pb);
1714 
1715  av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1716 
1717  if (!entries)
1718  return 0;
1719  if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1720  return AVERROR_INVALIDDATA;
1721  sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1722  if (!sc->stsc_data)
1723  return AVERROR(ENOMEM);
1724 
1725  for (i = 0; i < entries && !pb->eof_reached; i++) {
1726  sc->stsc_data[i].first = avio_rb32(pb);
1727  sc->stsc_data[i].count = avio_rb32(pb);
1728  sc->stsc_data[i].id = avio_rb32(pb);
1729  }
1730 
1731  sc->stsc_count = i;
1732 
1733  if (pb->eof_reached)
1734  return AVERROR_EOF;
1735 
1736  return 0;
1737 }
1738 
1739 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1740 {
1741  AVStream *st;
1742  MOVStreamContext *sc;
1743  unsigned i, entries;
1744 
1745  if (c->fc->nb_streams < 1)
1746  return 0;
1747  st = c->fc->streams[c->fc->nb_streams-1];
1748  sc = st->priv_data;
1749 
1750  avio_rb32(pb); // version + flags
1751 
1752  entries = avio_rb32(pb);
1753  if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1754  return AVERROR_INVALIDDATA;
1755  sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1756  if (!sc->stps_data)
1757  return AVERROR(ENOMEM);
1758 
1759  for (i = 0; i < entries && !pb->eof_reached; i++) {
1760  sc->stps_data[i] = avio_rb32(pb);
1761  //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1762  }
1763 
1764  sc->stps_count = i;
1765 
1766  if (pb->eof_reached)
1767  return AVERROR_EOF;
1768 
1769  return 0;
1770 }
1771 
1772 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1773 {
1774  AVStream *st;
1775  MOVStreamContext *sc;
1776  unsigned int i, entries;
1777 
1778  if (c->fc->nb_streams < 1)
1779  return 0;
1780  st = c->fc->streams[c->fc->nb_streams-1];
1781  sc = st->priv_data;
1782 
1783  avio_r8(pb); /* version */
1784  avio_rb24(pb); /* flags */
1785 
1786  entries = avio_rb32(pb);
1787 
1788  av_dlog(c->fc, "keyframe_count = %d\n", entries);
1789 
1790  if (!entries)
1791  {
1792  sc->keyframe_absent = 1;
1793  if (!st->need_parsing && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1794  st->need_parsing = AVSTREAM_PARSE_HEADERS;
1795  return 0;
1796  }
1797  if (entries >= UINT_MAX / sizeof(int))
1798  return AVERROR_INVALIDDATA;
1799  sc->keyframes = av_malloc(entries * sizeof(int));
1800  if (!sc->keyframes)
1801  return AVERROR(ENOMEM);
1802 
1803  for (i = 0; i < entries && !pb->eof_reached; i++) {
1804  sc->keyframes[i] = avio_rb32(pb);
1805  //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1806  }
1807 
1808  sc->keyframe_count = i;
1809 
1810  if (pb->eof_reached)
1811  return AVERROR_EOF;
1812 
1813  return 0;
1814 }
1815 
1816 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1817 {
1818  AVStream *st;
1819  MOVStreamContext *sc;
1820  unsigned int i, entries, sample_size, field_size, num_bytes;
1821  GetBitContext gb;
1822  unsigned char* buf;
1823 
1824  if (c->fc->nb_streams < 1)
1825  return 0;
1826  st = c->fc->streams[c->fc->nb_streams-1];
1827  sc = st->priv_data;
1828 
1829  avio_r8(pb); /* version */
1830  avio_rb24(pb); /* flags */
1831 
1832  if (atom.type == MKTAG('s','t','s','z')) {
1833  sample_size = avio_rb32(pb);
1834  if (!sc->sample_size) /* do not overwrite value computed in stsd */
1835  sc->sample_size = sample_size;
1836  sc->stsz_sample_size = sample_size;
1837  field_size = 32;
1838  } else {
1839  sample_size = 0;
1840  avio_rb24(pb); /* reserved */
1841  field_size = avio_r8(pb);
1842  }
1843  entries = avio_rb32(pb);
1844 
1845  av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1846 
1847  sc->sample_count = entries;
1848  if (sample_size)
1849  return 0;
1850 
1851  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1852  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1853  return AVERROR_INVALIDDATA;
1854  }
1855 
1856  if (!entries)
1857  return 0;
1858  if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1859  return AVERROR_INVALIDDATA;
1860  sc->sample_sizes = av_malloc(entries * sizeof(int));
1861  if (!sc->sample_sizes)
1862  return AVERROR(ENOMEM);
1863 
1864  num_bytes = (entries*field_size+4)>>3;
1865 
1866  buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1867  if (!buf) {
1868  av_freep(&sc->sample_sizes);
1869  return AVERROR(ENOMEM);
1870  }
1871 
1872  if (avio_read(pb, buf, num_bytes) < num_bytes) {
1873  av_freep(&sc->sample_sizes);
1874  av_free(buf);
1875  return AVERROR_INVALIDDATA;
1876  }
1877 
1878  init_get_bits(&gb, buf, 8*num_bytes);
1879 
1880  for (i = 0; i < entries && !pb->eof_reached; i++) {
1881  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1882  sc->data_size += sc->sample_sizes[i];
1883  }
1884 
1885  sc->sample_count = i;
1886 
1887  if (pb->eof_reached)
1888  return AVERROR_EOF;
1889 
1890  av_free(buf);
1891  return 0;
1892 }
1893 
1894 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1895 {
1896  AVStream *st;
1897  MOVStreamContext *sc;
1898  unsigned int i, entries;
1899  int64_t duration=0;
1900  int64_t total_sample_count=0;
1901 
1902  if (c->fc->nb_streams < 1)
1903  return 0;
1904  st = c->fc->streams[c->fc->nb_streams-1];
1905  sc = st->priv_data;
1906 
1907  avio_r8(pb); /* version */
1908  avio_rb24(pb); /* flags */
1909  entries = avio_rb32(pb);
1910 
1911  av_dlog(c->fc, "track[%i].stts.entries = %i\n",
1912  c->fc->nb_streams-1, entries);
1913 
1914  if (entries >= UINT_MAX / sizeof(*sc->stts_data))
1915  return -1;
1916 
1917  av_free(sc->stts_data);
1918  sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1919  if (!sc->stts_data)
1920  return AVERROR(ENOMEM);
1921 
1922  for (i = 0; i < entries && !pb->eof_reached; i++) {
1923  int sample_duration;
1924  int sample_count;
1925 
1926  sample_count=avio_rb32(pb);
1927  sample_duration = avio_rb32(pb);
1928 
1929  /* sample_duration < 0 is invalid based on the spec */
1930  if (sample_duration < 0) {
1931  av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta %d in STTS, at %d st:%d\n",
1932  sample_duration, i, c->fc->nb_streams-1);
1933  sample_duration = 1;
1934  }
1935  if (sample_count < 0) {
1936  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
1937  return AVERROR_INVALIDDATA;
1938  }
1939  sc->stts_data[i].count= sample_count;
1940  sc->stts_data[i].duration= sample_duration;
1941 
1942  av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
1943  sample_count, sample_duration);
1944 
1945  if ( i+1 == entries
1946  && i
1947  && sample_count == 1
1948  && total_sample_count > 100
1949  && sample_duration/10 > duration / total_sample_count)
1950  sample_duration = duration / total_sample_count;
1951  duration+=(int64_t)sample_duration*sample_count;
1952  total_sample_count+=sample_count;
1953  }
1954 
1955  sc->stts_count = i;
1956 
1957  sc->duration_for_fps += duration;
1958  sc->nb_frames_for_fps += total_sample_count;
1959 
1960  if (pb->eof_reached)
1961  return AVERROR_EOF;
1962 
1963  st->nb_frames= total_sample_count;
1964  if (duration)
1965  st->duration= duration;
1966  sc->track_end = duration;
1967  return 0;
1968 }
1969 
1970 static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
1971 {
1972  if (duration < 0) {
1973  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1974  }
1975 }
1976 
1977 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1978 {
1979  AVStream *st;
1980  MOVStreamContext *sc;
1981  unsigned int i, entries;
1982 
1983  if (c->fc->nb_streams < 1)
1984  return 0;
1985  st = c->fc->streams[c->fc->nb_streams-1];
1986  sc = st->priv_data;
1987 
1988  avio_r8(pb); /* version */
1989  avio_rb24(pb); /* flags */
1990  entries = avio_rb32(pb);
1991 
1992  av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1993 
1994  if (!entries)
1995  return 0;
1996  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
1997  return AVERROR_INVALIDDATA;
1998  sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1999  if (!sc->ctts_data)
2000  return AVERROR(ENOMEM);
2001 
2002  for (i = 0; i < entries && !pb->eof_reached; i++) {
2003  int count =avio_rb32(pb);
2004  int duration =avio_rb32(pb);
2005 
2006  sc->ctts_data[i].count = count;
2007  sc->ctts_data[i].duration= duration;
2008 
2009  av_dlog(c->fc, "count=%d, duration=%d\n",
2010  count, duration);
2011 
2012  if (FFABS(duration) > (1<<28) && i+2<entries) {
2013  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2014  av_freep(&sc->ctts_data);
2015  sc->ctts_count = 0;
2016  return 0;
2017  }
2018 
2019  if (i+2<entries)
2020  mov_update_dts_shift(sc, duration);
2021  }
2022 
2023  sc->ctts_count = i;
2024 
2025  if (pb->eof_reached)
2026  return AVERROR_EOF;
2027 
2028  av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
2029 
2030  return 0;
2031 }
2032 
2033 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2034 {
2035  AVStream *st;
2036  MOVStreamContext *sc;
2037  unsigned int i, entries;
2038  uint8_t version;
2039  uint32_t grouping_type;
2040 
2041  if (c->fc->nb_streams < 1)
2042  return 0;
2043  st = c->fc->streams[c->fc->nb_streams-1];
2044  sc = st->priv_data;
2045 
2046  version = avio_r8(pb); /* version */
2047  avio_rb24(pb); /* flags */
2048  grouping_type = avio_rl32(pb);
2049  if (grouping_type != MKTAG( 'r','a','p',' '))
2050  return 0; /* only support 'rap ' grouping */
2051  if (version == 1)
2052  avio_rb32(pb); /* grouping_type_parameter */
2053 
2054  entries = avio_rb32(pb);
2055  if (!entries)
2056  return 0;
2057  if (entries >= UINT_MAX / sizeof(*sc->rap_group))
2058  return AVERROR_INVALIDDATA;
2059  sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
2060  if (!sc->rap_group)
2061  return AVERROR(ENOMEM);
2062 
2063  for (i = 0; i < entries && !pb->eof_reached; i++) {
2064  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2065  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2066  }
2067 
2068  sc->rap_group_count = i;
2069 
2070  return pb->eof_reached ? AVERROR_EOF : 0;
2071 }
2072 
2073 static void mov_build_index(MOVContext *mov, AVStream *st)
2074 {
2075  MOVStreamContext *sc = st->priv_data;
2076  int64_t current_offset;
2077  int64_t current_dts = 0;
2078  unsigned int stts_index = 0;
2079  unsigned int stsc_index = 0;
2080  unsigned int stss_index = 0;
2081  unsigned int stps_index = 0;
2082  unsigned int i, j;
2083  uint64_t stream_size = 0;
2084 
2085  /* adjust first dts according to edit list */
2086  if ((sc->empty_duration || sc->start_time) && mov->time_scale > 0) {
2087  if (sc->empty_duration)
2088  sc->empty_duration = av_rescale(sc->empty_duration, sc->time_scale, mov->time_scale);
2089  sc->time_offset = sc->start_time - sc->empty_duration;
2090  current_dts = -sc->time_offset;
2091  if (sc->ctts_count>0 && sc->stts_count>0 &&
2092  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2093  /* more than 16 frames delay, dts are likely wrong
2094  this happens with files created by iMovie */
2095  sc->wrong_dts = 1;
2096  st->codec->has_b_frames = 1;
2097  }
2098  }
2099 
2100  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2101  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2102  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2103  unsigned int current_sample = 0;
2104  unsigned int stts_sample = 0;
2105  unsigned int sample_size;
2106  unsigned int distance = 0;
2107  unsigned int rap_group_index = 0;
2108  unsigned int rap_group_sample = 0;
2109  int rap_group_present = sc->rap_group_count && sc->rap_group;
2110  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2111 
2112  current_dts -= sc->dts_shift;
2113 
2114  if (!sc->sample_count || st->nb_index_entries)
2115  return;
2116  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2117  return;
2118  if (av_reallocp_array(&st->index_entries,
2119  st->nb_index_entries + sc->sample_count,
2120  sizeof(*st->index_entries)) < 0) {
2121  st->nb_index_entries = 0;
2122  return;
2123  }
2124  st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
2125 
2126  for (i = 0; i < sc->chunk_count; i++) {
2127  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2128  current_offset = sc->chunk_offsets[i];
2129  while (stsc_index + 1 < sc->stsc_count &&
2130  i + 1 == sc->stsc_data[stsc_index + 1].first)
2131  stsc_index++;
2132 
2133  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2134  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2135  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2136  sc->stsz_sample_size = sc->sample_size;
2137  }
2138  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2139  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2140  sc->stsz_sample_size = sc->sample_size;
2141  }
2142 
2143  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2144  int keyframe = 0;
2145  if (current_sample >= sc->sample_count) {
2146  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2147  return;
2148  }
2149 
2150  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2151  keyframe = 1;
2152  if (stss_index + 1 < sc->keyframe_count)
2153  stss_index++;
2154  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2155  keyframe = 1;
2156  if (stps_index + 1 < sc->stps_count)
2157  stps_index++;
2158  }
2159  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2160  if (sc->rap_group[rap_group_index].index > 0)
2161  keyframe = 1;
2162  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2163  rap_group_sample = 0;
2164  rap_group_index++;
2165  }
2166  }
2167  if (sc->keyframe_absent
2168  && !sc->stps_count
2169  && !rap_group_present
2170  && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2171  keyframe = 1;
2172  if (keyframe)
2173  distance = 0;
2174  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2175  if (sc->pseudo_stream_id == -1 ||
2176  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2177  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2178  e->pos = current_offset;
2179  e->timestamp = current_dts;
2180  e->size = sample_size;
2181  e->min_distance = distance;
2182  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2183  av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2184  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2185  current_offset, current_dts, sample_size, distance, keyframe);
2186  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2187  ff_rfps_add_frame(mov->fc, st, current_dts);
2188  }
2189 
2190  current_offset += sample_size;
2191  stream_size += sample_size;
2192  current_dts += sc->stts_data[stts_index].duration;
2193  distance++;
2194  stts_sample++;
2195  current_sample++;
2196  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2197  stts_sample = 0;
2198  stts_index++;
2199  }
2200  }
2201  }
2202  if (st->duration > 0)
2203  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2204  } else {
2205  unsigned chunk_samples, total = 0;
2206 
2207  // compute total chunk count
2208  for (i = 0; i < sc->stsc_count; i++) {
2209  unsigned count, chunk_count;
2210 
2211  chunk_samples = sc->stsc_data[i].count;
2212  if (i != sc->stsc_count - 1 &&
2213  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2214  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2215  return;
2216  }
2217 
2218  if (sc->samples_per_frame >= 160) { // gsm
2219  count = chunk_samples / sc->samples_per_frame;
2220  } else if (sc->samples_per_frame > 1) {
2221  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2222  count = (chunk_samples+samples-1) / samples;
2223  } else {
2224  count = (chunk_samples+1023) / 1024;
2225  }
2226 
2227  if (i < sc->stsc_count - 1)
2228  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2229  else
2230  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2231  total += chunk_count * count;
2232  }
2233 
2234  av_dlog(mov->fc, "chunk count %d\n", total);
2235  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2236  return;
2237  if (av_reallocp_array(&st->index_entries,
2238  st->nb_index_entries + total,
2239  sizeof(*st->index_entries)) < 0) {
2240  st->nb_index_entries = 0;
2241  return;
2242  }
2243  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2244 
2245  // populate index
2246  for (i = 0; i < sc->chunk_count; i++) {
2247  current_offset = sc->chunk_offsets[i];
2248  if (stsc_index + 1 < sc->stsc_count &&
2249  i + 1 == sc->stsc_data[stsc_index + 1].first)
2250  stsc_index++;
2251  chunk_samples = sc->stsc_data[stsc_index].count;
2252 
2253  while (chunk_samples > 0) {
2254  AVIndexEntry *e;
2255  unsigned size, samples;
2256 
2257  if (sc->samples_per_frame >= 160) { // gsm
2258  samples = sc->samples_per_frame;
2259  size = sc->bytes_per_frame;
2260  } else {
2261  if (sc->samples_per_frame > 1) {
2262  samples = FFMIN((1024 / sc->samples_per_frame)*
2263  sc->samples_per_frame, chunk_samples);
2264  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2265  } else {
2266  samples = FFMIN(1024, chunk_samples);
2267  size = samples * sc->sample_size;
2268  }
2269  }
2270 
2271  if (st->nb_index_entries >= total) {
2272  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2273  return;
2274  }
2275  e = &st->index_entries[st->nb_index_entries++];
2276  e->pos = current_offset;
2277  e->timestamp = current_dts;
2278  e->size = size;
2279  e->min_distance = 0;
2280  e->flags = AVINDEX_KEYFRAME;
2281  av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2282  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2283  size, samples);
2284 
2285  current_offset += size;
2286  current_dts += samples;
2287  chunk_samples -= samples;
2288  }
2289  }
2290  }
2291 }
2292 
2293 static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
2294  AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
2295 {
2296  /* try relative path, we do not try the absolute because it can leak information about our
2297  system to an attacker */
2298  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2299  char filename[1024];
2300  const char *src_path;
2301  int i, l;
2302 
2303  /* find a source dir */
2304  src_path = strrchr(src, '/');
2305  if (src_path)
2306  src_path++;
2307  else
2308  src_path = src;
2309 
2310  /* find a next level down to target */
2311  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2312  if (ref->path[l] == '/') {
2313  if (i == ref->nlvl_to - 1)
2314  break;
2315  else
2316  i++;
2317  }
2318 
2319  /* compose filename if next level down to target was found */
2320  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2321  memcpy(filename, src, src_path - src);
2322  filename[src_path - src] = 0;
2323 
2324  for (i = 1; i < ref->nlvl_from; i++)
2325  av_strlcat(filename, "../", 1024);
2326 
2327  av_strlcat(filename, ref->path + l + 1, 1024);
2328 
2329  if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2330  return 0;
2331  }
2332  } else if (use_absolute_path) {
2333  av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
2334  "this is a possible security issue\n");
2335  if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2336  return 0;
2337  }
2338 
2339  return AVERROR(ENOENT);
2340 }
2341 
2342 static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
2343 {
2344  if (sc->time_scale <= 0) {
2345  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2346  sc->time_scale = c->time_scale;
2347  if (sc->time_scale <= 0)
2348  sc->time_scale = 1;
2349  }
2350 }
2351 
2352 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2353 {
2354  AVStream *st;
2355  MOVStreamContext *sc;
2356  int ret;
2357 
2358  st = avformat_new_stream(c->fc, NULL);
2359  if (!st) return AVERROR(ENOMEM);
2360  st->id = c->fc->nb_streams;
2361  sc = av_mallocz(sizeof(MOVStreamContext));
2362  if (!sc) return AVERROR(ENOMEM);
2363 
2364  st->priv_data = sc;
2365  st->codec->codec_type = AVMEDIA_TYPE_DATA;
2366  sc->ffindex = st->index;
2367 
2368  if ((ret = mov_read_default(c, pb, atom)) < 0)
2369  return ret;
2370 
2371  /* sanity checks */
2372  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2373  (!sc->sample_size && !sc->sample_count))) {
2374  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2375  st->index);
2376  return 0;
2377  }
2378 
2379  fix_timescale(c, sc);
2380 
2381  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2382 
2383  mov_build_index(c, st);
2384 
2385  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2386  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2387  if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
2388  c->use_absolute_path, c->fc) < 0)
2389  av_log(c->fc, AV_LOG_ERROR,
2390  "stream %d, error opening alias: path='%s', dir='%s', "
2391  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2392  st->index, dref->path, dref->dir, dref->filename,
2393  dref->volume, dref->nlvl_from, dref->nlvl_to);
2394  } else {
2395  sc->pb = c->fc->pb;
2396  sc->pb_is_copied = 1;
2397  }
2398 
2399  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2400  if (!st->sample_aspect_ratio.num &&
2401  (st->codec->width != sc->width || st->codec->height != sc->height)) {
2402  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2403  ((double)st->codec->width * sc->height), INT_MAX);
2404  }
2405 
2406 #if FF_API_R_FRAME_RATE
2407  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2408  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
2409  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2410 #endif
2411  }
2412 
2413  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2414  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2415  TAG_IS_AVCI(st->codec->codec_tag)) {
2416  ret = ff_generate_avci_extradata(st);
2417  if (ret < 0)
2418  return ret;
2419  }
2420 
2421  switch (st->codec->codec_id) {
2422 #if CONFIG_H261_DECODER
2423  case AV_CODEC_ID_H261:
2424 #endif
2425 #if CONFIG_H263_DECODER
2426  case AV_CODEC_ID_H263:
2427 #endif
2428 #if CONFIG_MPEG4_DECODER
2429  case AV_CODEC_ID_MPEG4:
2430 #endif
2431  st->codec->width = 0; /* let decoder init width/height */
2432  st->codec->height= 0;
2433  break;
2434  }
2435 
2436  /* Do not need those anymore. */
2437  av_freep(&sc->chunk_offsets);
2438  av_freep(&sc->stsc_data);
2439  av_freep(&sc->sample_sizes);
2440  av_freep(&sc->keyframes);
2441  av_freep(&sc->stts_data);
2442  av_freep(&sc->stps_data);
2443  av_freep(&sc->rap_group);
2444 
2445  return 0;
2446 }
2447 
2448 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2449 {
2450  int ret;
2451  c->itunes_metadata = 1;
2452  ret = mov_read_default(c, pb, atom);
2453  c->itunes_metadata = 0;
2454  return ret;
2455 }
2456 
2457 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2458 {
2459  while (atom.size > 8) {
2460  uint32_t tag = avio_rl32(pb);
2461  atom.size -= 4;
2462  if (tag == MKTAG('h','d','l','r')) {
2463  avio_seek(pb, -8, SEEK_CUR);
2464  atom.size += 8;
2465  return mov_read_default(c, pb, atom);
2466  }
2467  }
2468  return 0;
2469 }
2470 
2471 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2472 {
2473  int i;
2474  int width;
2475  int height;
2476  int64_t disp_transform[2];
2477  int display_matrix[3][2];
2478  AVStream *st;
2479  MOVStreamContext *sc;
2480  int version;
2481  int flags;
2482 
2483  if (c->fc->nb_streams < 1)
2484  return 0;
2485  st = c->fc->streams[c->fc->nb_streams-1];
2486  sc = st->priv_data;
2487 
2488  version = avio_r8(pb);
2489  flags = avio_rb24(pb);
2490  st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
2491 
2492  if (version == 1) {
2493  avio_rb64(pb);
2494  avio_rb64(pb);
2495  } else {
2496  avio_rb32(pb); /* creation time */
2497  avio_rb32(pb); /* modification time */
2498  }
2499  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2500  avio_rb32(pb); /* reserved */
2501 
2502  /* highlevel (considering edits) duration in movie timebase */
2503  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2504  avio_rb32(pb); /* reserved */
2505  avio_rb32(pb); /* reserved */
2506 
2507  avio_rb16(pb); /* layer */
2508  avio_rb16(pb); /* alternate group */
2509  avio_rb16(pb); /* volume */
2510  avio_rb16(pb); /* reserved */
2511 
2512  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2513  // they're kept in fixed point format through all calculations
2514  // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
2515  for (i = 0; i < 3; i++) {
2516  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2517  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2518  avio_rb32(pb); // 2.30 fixed point (not used)
2519  }
2520 
2521  width = avio_rb32(pb); // 16.16 fixed point track width
2522  height = avio_rb32(pb); // 16.16 fixed point track height
2523  sc->width = width >> 16;
2524  sc->height = height >> 16;
2525 
2526  //Assign clockwise rotate values based on transform matrix so that
2527  //we can compensate for iPhone orientation during capture.
2528 
2529  if (display_matrix[1][0] == -65536 && display_matrix[0][1] == 65536) {
2530  av_dict_set(&st->metadata, "rotate", "90", 0);
2531  }
2532 
2533  if (display_matrix[0][0] == -65536 && display_matrix[1][1] == -65536) {
2534  av_dict_set(&st->metadata, "rotate", "180", 0);
2535  }
2536 
2537  if (display_matrix[1][0] == 65536 && display_matrix[0][1] == -65536) {
2538  av_dict_set(&st->metadata, "rotate", "270", 0);
2539  }
2540 
2541  // transform the display width/height according to the matrix
2542  // skip this if the display matrix is the default identity matrix
2543  // or if it is rotating the picture, ex iPhone 3GS
2544  // to keep the same scale, use [width height 1<<16]
2545  if (width && height &&
2546  ((display_matrix[0][0] != 65536 ||
2547  display_matrix[1][1] != 65536) &&
2548  !display_matrix[0][1] &&
2549  !display_matrix[1][0] &&
2550  !display_matrix[2][0] && !display_matrix[2][1])) {
2551  for (i = 0; i < 2; i++)
2552  disp_transform[i] =
2553  (int64_t) width * display_matrix[0][i] +
2554  (int64_t) height * display_matrix[1][i] +
2555  ((int64_t) display_matrix[2][i] << 16);
2556 
2557  //sample aspect ratio is new width/height divided by old width/height
2558  st->sample_aspect_ratio = av_d2q(
2559  ((double) disp_transform[0] * height) /
2560  ((double) disp_transform[1] * width), INT_MAX);
2561  }
2562  return 0;
2563 }
2564 
2565 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2566 {
2567  MOVFragment *frag = &c->fragment;
2568  MOVTrackExt *trex = NULL;
2569  int flags, track_id, i;
2570 
2571  avio_r8(pb); /* version */
2572  flags = avio_rb24(pb);
2573 
2574  track_id = avio_rb32(pb);
2575  if (!track_id)
2576  return AVERROR_INVALIDDATA;
2577  frag->track_id = track_id;
2578  for (i = 0; i < c->trex_count; i++)
2579  if (c->trex_data[i].track_id == frag->track_id) {
2580  trex = &c->trex_data[i];
2581  break;
2582  }
2583  if (!trex) {
2584  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2585  return AVERROR_INVALIDDATA;
2586  }
2587 
2588  frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
2589  avio_rb64(pb) : frag->moof_offset;
2590  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2591 
2592  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2593  avio_rb32(pb) : trex->duration;
2594  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2595  avio_rb32(pb) : trex->size;
2596  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2597  avio_rb32(pb) : trex->flags;
2598  av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2599  return 0;
2600 }
2601 
2602 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2603 {
2604  c->chapter_track = avio_rb32(pb);
2605  return 0;
2606 }
2607 
2608 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2609 {
2610  MOVTrackExt *trex;
2611  int err;
2612 
2613  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2614  return AVERROR_INVALIDDATA;
2615  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2616  sizeof(*c->trex_data))) < 0) {
2617  c->trex_count = 0;
2618  return err;
2619  }
2620 
2621  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
2622 
2623  trex = &c->trex_data[c->trex_count++];
2624  avio_r8(pb); /* version */
2625  avio_rb24(pb); /* flags */
2626  trex->track_id = avio_rb32(pb);
2627  trex->stsd_id = avio_rb32(pb);
2628  trex->duration = avio_rb32(pb);
2629  trex->size = avio_rb32(pb);
2630  trex->flags = avio_rb32(pb);
2631  return 0;
2632 }
2633 
2634 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2635 {
2636  MOVFragment *frag = &c->fragment;
2637  AVStream *st = NULL;
2638  MOVStreamContext *sc;
2639  MOVStts *ctts_data;
2640  uint64_t offset;
2641  int64_t dts;
2642  int data_offset = 0;
2643  unsigned entries, first_sample_flags = frag->flags;
2644  int flags, distance, i, found_keyframe = 0, err;
2645 
2646  for (i = 0; i < c->fc->nb_streams; i++) {
2647  if (c->fc->streams[i]->id == frag->track_id) {
2648  st = c->fc->streams[i];
2649  break;
2650  }
2651  }
2652  if (!st) {
2653  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2654  return AVERROR_INVALIDDATA;
2655  }
2656  sc = st->priv_data;
2657  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
2658  return 0;
2659  avio_r8(pb); /* version */
2660  flags = avio_rb24(pb);
2661  entries = avio_rb32(pb);
2662  av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2663 
2664  /* Always assume the presence of composition time offsets.
2665  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2666  * 1) in the initial movie, there are no samples.
2667  * 2) in the first movie fragment, there is only one sample without composition time offset.
2668  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2669  if (!sc->ctts_count && sc->sample_count)
2670  {
2671  /* Complement ctts table if moov atom doesn't have ctts atom. */
2672  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
2673  if (!ctts_data)
2674  return AVERROR(ENOMEM);
2675  sc->ctts_data = ctts_data;
2676  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
2677  sc->ctts_data[sc->ctts_count].duration = 0;
2678  sc->ctts_count++;
2679  }
2680  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2681  return AVERROR_INVALIDDATA;
2682  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
2683  sizeof(*sc->ctts_data))) < 0) {
2684  sc->ctts_count = 0;
2685  return err;
2686  }
2687  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
2688  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
2689  dts = sc->track_end - sc->time_offset;
2690  offset = frag->base_data_offset + data_offset;
2691  distance = 0;
2692  av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2693  for (i = 0; i < entries && !pb->eof_reached; i++) {
2694  unsigned sample_size = frag->size;
2695  int sample_flags = i ? frag->flags : first_sample_flags;
2696  unsigned sample_duration = frag->duration;
2697  int keyframe = 0;
2698 
2699  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
2700  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
2701  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
2702  sc->ctts_data[sc->ctts_count].count = 1;
2703  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
2704  avio_rb32(pb) : 0;
2705  mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
2706  sc->ctts_count++;
2707  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2708  keyframe = 1;
2709  else if (!found_keyframe)
2710  keyframe = found_keyframe =
2711  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
2712  MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
2713  if (keyframe)
2714  distance = 0;
2715  av_add_index_entry(st, offset, dts, sample_size, distance,
2716  keyframe ? AVINDEX_KEYFRAME : 0);
2717  av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2718  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2719  offset, dts, sample_size, distance, keyframe);
2720  distance++;
2721  dts += sample_duration;
2722  offset += sample_size;
2723  sc->data_size += sample_size;
2724  sc->duration_for_fps += sample_duration;
2725  sc->nb_frames_for_fps ++;
2726  }
2727 
2728  if (pb->eof_reached)
2729  return AVERROR_EOF;
2730 
2731  frag->moof_offset = offset;
2732  st->duration = sc->track_end = dts + sc->time_offset;
2733  return 0;
2734 }
2735 
2736 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2737 /* like the files created with Adobe Premiere 5.0, for samples see */
2738 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2739 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2740 {
2741  int err;
2742 
2743  if (atom.size < 8)
2744  return 0; /* continue */
2745  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2746  avio_skip(pb, atom.size - 4);
2747  return 0;
2748  }
2749  atom.type = avio_rl32(pb);
2750  atom.size -= 8;
2751  if (atom.type != MKTAG('m','d','a','t')) {
2752  avio_skip(pb, atom.size);
2753  return 0;
2754  }
2755  err = mov_read_mdat(c, pb, atom);
2756  return err;
2757 }
2758 
2759 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2760 {
2761 #if CONFIG_ZLIB
2762  AVIOContext ctx;
2763  uint8_t *cmov_data;
2764  uint8_t *moov_data; /* uncompressed data */
2765  long cmov_len, moov_len;
2766  int ret = -1;
2767 
2768  avio_rb32(pb); /* dcom atom */
2769  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2770  return AVERROR_INVALIDDATA;
2771  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2772  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
2773  return AVERROR_INVALIDDATA;
2774  }
2775  avio_rb32(pb); /* cmvd atom */
2776  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2777  return AVERROR_INVALIDDATA;
2778  moov_len = avio_rb32(pb); /* uncompressed size */
2779  cmov_len = atom.size - 6 * 4;
2780 
2781  cmov_data = av_malloc(cmov_len);
2782  if (!cmov_data)
2783  return AVERROR(ENOMEM);
2784  moov_data = av_malloc(moov_len);
2785  if (!moov_data) {
2786  av_free(cmov_data);
2787  return AVERROR(ENOMEM);
2788  }
2789  avio_read(pb, cmov_data, cmov_len);
2790  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2791  goto free_and_return;
2792  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2793  goto free_and_return;
2794  atom.type = MKTAG('m','o','o','v');
2795  atom.size = moov_len;
2796  ret = mov_read_default(c, &ctx, atom);
2797 free_and_return:
2798  av_free(moov_data);
2799  av_free(cmov_data);
2800  return ret;
2801 #else
2802  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2803  return AVERROR(ENOSYS);
2804 #endif
2805 }
2806 
2807 /* edit list atom */
2808 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2809 {
2810  MOVStreamContext *sc;
2811  int i, edit_count, version, edit_start_index = 0;
2812  int unsupported = 0;
2813 
2814  if (c->fc->nb_streams < 1 || c->ignore_editlist)
2815  return 0;
2816  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2817 
2818  version = avio_r8(pb); /* version */
2819  avio_rb24(pb); /* flags */
2820  edit_count = avio_rb32(pb); /* entries */
2821 
2822  if ((uint64_t)edit_count*12+8 > atom.size)
2823  return AVERROR_INVALIDDATA;
2824 
2825  av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2826  for (i=0; i<edit_count; i++){
2827  int64_t time;
2828  int64_t duration;
2829  int rate;
2830  if (version == 1) {
2831  duration = avio_rb64(pb);
2832  time = avio_rb64(pb);
2833  } else {
2834  duration = avio_rb32(pb); /* segment duration */
2835  time = (int32_t)avio_rb32(pb); /* media time */
2836  }
2837  rate = avio_rb32(pb);
2838  if (i == 0 && time == -1) {
2839  sc->empty_duration = duration;
2840  edit_start_index = 1;
2841  } else if (i == edit_start_index && time >= 0)
2842  sc->start_time = time;
2843  else
2844  unsupported = 1;
2845 
2846  av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
2847  duration, time, rate / 65536.0);
2848  }
2849 
2850  if (unsupported)
2851  av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2852  "a/v desync might occur, patch welcome\n");
2853 
2854  return 0;
2855 }
2856 
2857 static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2858 {
2859  MOVStreamContext *sc;
2860 
2861  if (c->fc->nb_streams < 1)
2862  return AVERROR_INVALIDDATA;
2863  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
2864  sc->timecode_track = avio_rb32(pb);
2865  return 0;
2866 }
2867 
2868 static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2869 {
2870  int ret;
2871  uint8_t uuid[16];
2872  static const uint8_t uuid_isml_manifest[] = {
2873  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
2874  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
2875  };
2876 
2877  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
2878  return AVERROR_INVALIDDATA;
2879 
2880  ret = avio_read(pb, uuid, sizeof(uuid));
2881  if (ret < 0) {
2882  return ret;
2883  } else if (ret != sizeof(uuid)) {
2884  return AVERROR_INVALIDDATA;
2885  }
2886  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
2887  uint8_t *buffer, *ptr;
2888  char *endptr;
2889  size_t len = atom.size - sizeof(uuid);
2890 
2891  if (len < 4) {
2892  return AVERROR_INVALIDDATA;
2893  }
2894  ret = avio_skip(pb, 4); // zeroes
2895  len -= 4;
2896 
2897  buffer = av_mallocz(len + 1);
2898  if (!buffer) {
2899  return AVERROR(ENOMEM);
2900  }
2901  ret = avio_read(pb, buffer, len);
2902  if (ret < 0) {
2903  av_free(buffer);
2904  return ret;
2905  } else if (ret != len) {
2906  av_free(buffer);
2907  return AVERROR_INVALIDDATA;
2908  }
2909 
2910  ptr = buffer;
2911  while ((ptr = av_stristr(ptr, "systemBitrate=\"")) != NULL) {
2912  ptr += sizeof("systemBitrate=\"") - 1;
2913  c->bitrates_count++;
2914  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
2915  if (!c->bitrates) {
2916  c->bitrates_count = 0;
2917  av_free(buffer);
2918  return AVERROR(ENOMEM);
2919  }
2920  errno = 0;
2921  ret = strtol(ptr, &endptr, 10);
2922  if (ret < 0 || errno || *endptr != '"') {
2923  c->bitrates[c->bitrates_count - 1] = 0;
2924  } else {
2925  c->bitrates[c->bitrates_count - 1] = ret;
2926  }
2927  }
2928 
2929  av_free(buffer);
2930  }
2931  return 0;
2932 }
2933 
2934 static const MOVParseTableEntry mov_default_parse_table[] = {
2935 { MKTAG('A','C','L','R'), mov_read_avid },
2936 { MKTAG('A','P','R','G'), mov_read_avid },
2937 { MKTAG('A','A','L','P'), mov_read_avid },
2938 { MKTAG('A','R','E','S'), mov_read_ares },
2939 { MKTAG('a','v','s','s'), mov_read_avss },
2940 { MKTAG('c','h','p','l'), mov_read_chpl },
2941 { MKTAG('c','o','6','4'), mov_read_stco },
2942 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2943 { MKTAG('d','i','n','f'), mov_read_default },
2944 { MKTAG('d','r','e','f'), mov_read_dref },
2945 { MKTAG('e','d','t','s'), mov_read_default },
2946 { MKTAG('e','l','s','t'), mov_read_elst },
2947 { MKTAG('e','n','d','a'), mov_read_enda },
2948 { MKTAG('f','i','e','l'), mov_read_fiel },
2949 { MKTAG('f','t','y','p'), mov_read_ftyp },
2950 { MKTAG('g','l','b','l'), mov_read_glbl },
2951 { MKTAG('h','d','l','r'), mov_read_hdlr },
2952 { MKTAG('i','l','s','t'), mov_read_ilst },
2953 { MKTAG('j','p','2','h'), mov_read_jp2h },
2954 { MKTAG('m','d','a','t'), mov_read_mdat },
2955 { MKTAG('m','d','h','d'), mov_read_mdhd },
2956 { MKTAG('m','d','i','a'), mov_read_default },
2957 { MKTAG('m','e','t','a'), mov_read_meta },
2958 { MKTAG('m','i','n','f'), mov_read_default },
2959 { MKTAG('m','o','o','f'), mov_read_moof },
2960 { MKTAG('m','o','o','v'), mov_read_moov },
2961 { MKTAG('m','v','e','x'), mov_read_default },
2962 { MKTAG('m','v','h','d'), mov_read_mvhd },
2963 { MKTAG('S','M','I',' '), mov_read_svq3 },
2964 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
2965 { MKTAG('a','v','c','C'), mov_read_glbl },
2966 { MKTAG('p','a','s','p'), mov_read_pasp },
2967 { MKTAG('s','t','b','l'), mov_read_default },
2968 { MKTAG('s','t','c','o'), mov_read_stco },
2969 { MKTAG('s','t','p','s'), mov_read_stps },
2970 { MKTAG('s','t','r','f'), mov_read_strf },
2971 { MKTAG('s','t','s','c'), mov_read_stsc },
2972 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2973 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2974 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2975 { MKTAG('s','t','t','s'), mov_read_stts },
2976 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2977 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2978 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2979 { MKTAG('t','r','a','k'), mov_read_trak },
2980 { MKTAG('t','r','a','f'), mov_read_default },
2981 { MKTAG('t','r','e','f'), mov_read_default },
2982 { MKTAG('t','m','c','d'), mov_read_tmcd },
2983 { MKTAG('c','h','a','p'), mov_read_chap },
2984 { MKTAG('t','r','e','x'), mov_read_trex },
2985 { MKTAG('t','r','u','n'), mov_read_trun },
2986 { MKTAG('u','d','t','a'), mov_read_default },
2987 { MKTAG('w','a','v','e'), mov_read_wave },
2988 { MKTAG('e','s','d','s'), mov_read_esds },
2989 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2990 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
2991 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2992 { MKTAG('w','f','e','x'), mov_read_wfex },
2993 { MKTAG('c','m','o','v'), mov_read_cmov },
2994 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
2995 { MKTAG('d','v','c','1'), mov_read_dvc1 },
2996 { MKTAG('s','b','g','p'), mov_read_sbgp },
2997 { MKTAG('h','v','c','C'), mov_read_glbl },
2998 { MKTAG('u','u','i','d'), mov_read_uuid },
2999 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
3000 { 0, NULL }
3001 };
3002 
3003 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3004 {
3005  int64_t total_size = 0;
3006  MOVAtom a;
3007  int i;
3008 
3009  if (atom.size < 0)
3010  atom.size = INT64_MAX;
3011  while (total_size + 8 <= atom.size && !url_feof(pb)) {
3012  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
3013  a.size = atom.size;
3014  a.type=0;
3015  if (atom.size >= 8) {
3016  a.size = avio_rb32(pb);
3017  a.type = avio_rl32(pb);
3018  if (atom.type != MKTAG('r','o','o','t') &&
3019  atom.type != MKTAG('m','o','o','v'))
3020  {
3021  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
3022  {
3023  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
3024  avio_skip(pb, -8);
3025  return 0;
3026  }
3027  }
3028  total_size += 8;
3029  if (a.size == 1) { /* 64 bit extended size */
3030  a.size = avio_rb64(pb) - 8;
3031  total_size += 8;
3032  }
3033  }
3034  av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3035  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3036  if (a.size == 0) {
3037  a.size = atom.size - total_size + 8;
3038  }
3039  a.size -= 8;
3040  if (a.size < 0)
3041  break;
3042  a.size = FFMIN(a.size, atom.size - total_size);
3043 
3044  for (i = 0; mov_default_parse_table[i].type; i++)
3045  if (mov_default_parse_table[i].type == a.type) {
3046  parse = mov_default_parse_table[i].parse;
3047  break;
3048  }
3049 
3050  // container is user data
3051  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3052  atom.type == MKTAG('i','l','s','t')))
3053  parse = mov_read_udta_string;
3054 
3055  if (!parse) { /* skip leaf atoms data */
3056  avio_skip(pb, a.size);
3057  } else {
3058  int64_t start_pos = avio_tell(pb);
3059  int64_t left;
3060  int err = parse(c, pb, a);
3061  if (err < 0)
3062  return err;
3063  if (c->found_moov && c->found_mdat &&
3064  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3065  start_pos + a.size == avio_size(pb))) {
3066  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3067  c->next_root_atom = start_pos + a.size;
3068  return 0;
3069  }
3070  left = a.size - avio_tell(pb) + start_pos;
3071  if (left > 0) /* skip garbage at atom end */
3072  avio_skip(pb, left);
3073  else if (left < 0) {
3074  av_log(c->fc, AV_LOG_WARNING,
3075  "overread end of atom '%.4s' by %"PRId64" bytes\n",
3076  (char*)&a.type, -left);
3077  avio_seek(pb, left, SEEK_CUR);
3078  }
3079  }
3080 
3081  total_size += a.size;
3082  }
3083 
3084  if (total_size < atom.size && atom.size < 0x7ffff)
3085  avio_skip(pb, atom.size - total_size);
3086 
3087  return 0;
3088 }
3089 
3090 static int mov_probe(AVProbeData *p)
3091 {
3092  int64_t offset;
3093  uint32_t tag;
3094  int score = 0;
3095  int moov_offset = -1;
3096 
3097  /* check file header */
3098  offset = 0;
3099  for (;;) {
3100  /* ignore invalid offset */
3101  if ((offset + 8) > (unsigned int)p->buf_size)
3102  break;
3103  tag = AV_RL32(p->buf + offset + 4);
3104  switch(tag) {
3105  /* check for obvious tags */
3106  case MKTAG('m','o','o','v'):
3107  moov_offset = offset + 4;
3108  case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
3109  case MKTAG('m','d','a','t'):
3110  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3111  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3112  case MKTAG('f','t','y','p'):
3113  if (AV_RB32(p->buf+offset) < 8 &&
3114  (AV_RB32(p->buf+offset) != 1 ||
3115  offset + 12 > (unsigned int)p->buf_size ||
3116  AV_RB64(p->buf+offset + 8) == 0)) {
3117  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3118  } else {
3119  score = AVPROBE_SCORE_MAX;
3120  }
3121  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3122  break;
3123  /* those are more common words, so rate then a bit less */
3124  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3125  case MKTAG('w','i','d','e'):
3126  case MKTAG('f','r','e','e'):
3127  case MKTAG('j','u','n','k'):
3128  case MKTAG('p','i','c','t'):
3129  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3130  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3131  break;
3132  case MKTAG(0x82,0x82,0x7f,0x7d):
3133  case MKTAG('s','k','i','p'):
3134  case MKTAG('u','u','i','d'):
3135  case MKTAG('p','r','f','l'):
3136  /* if we only find those cause probedata is too small at least rate them */
3137  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3138  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3139  break;
3140  default:
3141  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3142  }
3143  }
3144  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3145  /* moov atom in the header - we should make sure that this is not a
3146  * MOV-packed MPEG-PS */
3147  offset = moov_offset;
3148 
3149  while(offset < (p->buf_size - 16)){ /* Sufficient space */
3150  /* We found an actual hdlr atom */
3151  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3152  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3153  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3154  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3155  /* We found a media handler reference atom describing an
3156  * MPEG-PS-in-MOV, return a
3157  * low score to force expanding the probe window until
3158  * mpegps_probe finds what it needs */
3159  return 5;
3160  }else
3161  /* Keep looking */
3162  offset+=2;
3163  }
3164  }
3165 
3166  return score;
3167 }
3168 
3169 // must be done after parsing all trak because there's no order requirement
3170 static void mov_read_chapters(AVFormatContext *s)
3171 {
3172  MOVContext *mov = s->priv_data;
3173  AVStream *st = NULL;
3174  MOVStreamContext *sc;
3175  int64_t cur_pos;
3176  int i;
3177 
3178  for (i = 0; i < s->nb_streams; i++)
3179  if (s->streams[i]->id == mov->chapter_track) {
3180  st = s->streams[i];
3181  break;
3182  }
3183  if (!st) {
3184  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3185  return;
3186  }
3187 
3188  st->discard = AVDISCARD_ALL;
3189  sc = st->priv_data;
3190  cur_pos = avio_tell(sc->pb);
3191 
3192  for (i = 0; i < st->nb_index_entries; i++) {
3193  AVIndexEntry *sample = &st->index_entries[i];
3194  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3195  uint8_t *title;
3196  uint16_t ch;
3197  int len, title_len;
3198 
3199  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3200  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3201  goto finish;
3202  }
3203 
3204  // the first two bytes are the length of the title
3205  len = avio_rb16(sc->pb);
3206  if (len > sample->size-2)
3207  continue;
3208  title_len = 2*len + 1;
3209  if (!(title = av_mallocz(title_len)))
3210  goto finish;
3211 
3212  // The samples could theoretically be in any encoding if there's an encd
3213  // atom following, but in practice are only utf-8 or utf-16, distinguished
3214  // instead by the presence of a BOM
3215  if (!len) {
3216  title[0] = 0;
3217  } else {
3218  ch = avio_rb16(sc->pb);
3219  if (ch == 0xfeff)
3220  avio_get_str16be(sc->pb, len, title, title_len);
3221  else if (ch == 0xfffe)
3222  avio_get_str16le(sc->pb, len, title, title_len);
3223  else {
3224  AV_WB16(title, ch);
3225  if (len == 1 || len == 2)
3226  title[len] = 0;
3227  else
3228  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3229  }
3230  }
3231 
3232  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3233  av_freep(&title);
3234  }
3235 finish:
3236  avio_seek(sc->pb, cur_pos, SEEK_SET);
3237 }
3238 
3239 static int parse_timecode_in_framenum_format(AVFormatContext *s, AVStream *st,
3240  uint32_t value, int flags)
3241 {
3242  AVTimecode tc;
3243  char buf[AV_TIMECODE_STR_SIZE];
3244  AVRational rate = {st->codec->time_base.den,
3245  st->codec->time_base.num};
3246  int ret = av_timecode_init(&tc, rate, flags, 0, s);
3247  if (ret < 0)
3248  return ret;
3249  av_dict_set(&st->metadata, "timecode",
3250  av_timecode_make_string(&tc, buf, value), 0);
3251  return 0;
3252 }
3253 
3254 static int mov_read_timecode_track(AVFormatContext *s, AVStream *st)
3255 {
3256  MOVStreamContext *sc = st->priv_data;
3257  int flags = 0;
3258  int64_t cur_pos = avio_tell(sc->pb);
3259  uint32_t value;
3260 
3261  if (!st->nb_index_entries)
3262  return -1;
3263 
3264  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3265  value = avio_rb32(s->pb);
3266 
3267  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3268  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3269  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3270 
3271  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3272  * not the case) and thus assume "frame number format" instead of QT one.
3273  * No sample with tmcd track can be found with a QT timecode at the moment,
3274  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3275  * format). */
3276  parse_timecode_in_framenum_format(s, st, value, flags);
3277 
3278  avio_seek(sc->pb, cur_pos, SEEK_SET);
3279  return 0;
3280 }
3281 
3282 static int mov_read_close(AVFormatContext *s)
3283 {
3284  MOVContext *mov = s->priv_data;
3285  int i, j;
3286 
3287  for (i = 0; i < s->nb_streams; i++) {
3288  AVStream *st = s->streams[i];
3289  MOVStreamContext *sc = st->priv_data;
3290 
3291  av_freep(&sc->ctts_data);
3292  for (j = 0; j < sc->drefs_count; j++) {
3293  av_freep(&sc->drefs[j].path);
3294  av_freep(&sc->drefs[j].dir);
3295  }
3296  av_freep(&sc->drefs);
3297  if (!sc->pb_is_copied)
3298  avio_close(sc->pb);
3299 
3300  sc->pb = NULL;
3301  av_freep(&sc->chunk_offsets);
3302  av_freep(&sc->stsc_data);
3303  av_freep(&sc->sample_sizes);
3304  av_freep(&sc->keyframes);
3305  av_freep(&sc->stts_data);
3306  av_freep(&sc->stps_data);
3307  av_freep(&sc->rap_group);
3308  }
3309 
3310  if (mov->dv_demux) {
3311  for (i = 0; i < mov->dv_fctx->nb_streams; i++) {
3312  av_freep(&mov->dv_fctx->streams[i]->codec);
3313  av_freep(&mov->dv_fctx->streams[i]);
3314  }
3315  av_freep(&mov->dv_fctx);
3316  av_freep(&mov->dv_demux);
3317  }
3318 
3319  av_freep(&mov->trex_data);
3320  av_freep(&mov->bitrates);
3321 
3322  return 0;
3323 }
3324 
3325 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
3326 {
3327  int i;
3328 
3329  for (i = 0; i < s->nb_streams; i++) {
3330  AVStream *st = s->streams[i];
3331  MOVStreamContext *sc = st->priv_data;
3332 
3333  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3334  sc->timecode_track == tmcd_id)
3335  return 1;
3336  }
3337  return 0;
3338 }
3339 
3340 /* look for a tmcd track not referenced by any video track, and export it globally */
3341 static void export_orphan_timecode(AVFormatContext *s)
3342 {
3343  int i;
3344 
3345  for (i = 0; i < s->nb_streams; i++) {
3346  AVStream *st = s->streams[i];
3347 
3348  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
3349  !tmcd_is_referenced(s, i + 1)) {
3350  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
3351  if (tcr) {
3352  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
3353  break;
3354  }
3355  }
3356  }
3357 }
3358 
3359 static int mov_read_header(AVFormatContext *s)
3360 {
3361  MOVContext *mov = s->priv_data;
3362  AVIOContext *pb = s->pb;
3363  int i, j, err;
3364  MOVAtom atom = { AV_RL32("root") };
3365 
3366  mov->fc = s;
3367  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
3368  if (pb->seekable)
3369  atom.size = avio_size(pb);
3370  else
3371  atom.size = INT64_MAX;
3372 
3373  /* check MOV header */
3374  if ((err = mov_read_default(mov, pb, atom)) < 0) {
3375  av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
3376  mov_read_close(s);
3377  return err;
3378  }
3379  if (!mov->found_moov) {
3380  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
3381  mov_read_close(s);
3382  return AVERROR_INVALIDDATA;
3383  }
3384  av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
3385 
3386  if (pb->seekable) {
3387  if (mov->chapter_track > 0)
3388  mov_read_chapters(s);
3389  for (i = 0; i < s->nb_streams; i++)
3390  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
3391  mov_read_timecode_track(s, s->streams[i]);
3392  }
3393 
3394  /* copy timecode metadata from tmcd tracks to the related video streams */
3395  for (i = 0; i < s->nb_streams; i++) {
3396  AVStream *st = s->streams[i];
3397  MOVStreamContext *sc = st->priv_data;
3398  if (sc->timecode_track > 0) {
3399  AVDictionaryEntry *tcr;
3400  int tmcd_st_id = -1;
3401 
3402  for (j = 0; j < s->nb_streams; j++)
3403  if (s->streams[j]->id == sc->timecode_track)
3404  tmcd_st_id = j;
3405 
3406  if (tmcd_st_id < 0 || tmcd_st_id == i)
3407  continue;
3408  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
3409  if (tcr)
3410  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
3411  }
3412  }
3413  export_orphan_timecode(s);
3414 
3415  for (i = 0; i < s->nb_streams; i++) {
3416  AVStream *st = s->streams[i];
3417  MOVStreamContext *sc = st->priv_data;
3418  fix_timescale(mov, sc);
3419  if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_AAC) {
3420  st->skip_samples = sc->start_pad;
3421  }
3422  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
3423  av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3424  sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
3425  }
3426 
3427  if (mov->trex_data) {
3428  for (i = 0; i < s->nb_streams; i++) {
3429  AVStream *st = s->streams[i];
3430  MOVStreamContext *sc = st->priv_data;
3431  if (st->duration > 0)
3432  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
3433  }
3434  }
3435 
3436  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
3437  if (mov->bitrates[i]) {
3438  s->streams[i]->codec->bit_rate = mov->bitrates[i];
3439  }
3440  }
3441 
3442  ff_rfps_calculate(s);
3443 
3444  return 0;
3445 }
3446 
3447 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
3448 {
3449  AVIndexEntry *sample = NULL;
3450  int64_t best_dts = INT64_MAX;
3451  int i;
3452  for (i = 0; i < s->nb_streams; i++) {
3453  AVStream *avst = s->streams[i];
3454  MOVStreamContext *msc = avst->priv_data;
3455  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
3456  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
3457  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
3458  av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
3459  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
3460  (s->pb->seekable &&
3461  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
3462  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
3463  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
3464  sample = current_sample;
3465  best_dts = dts;
3466  *st = avst;
3467  }
3468  }
3469  }
3470  return sample;
3471 }
3472 
3473 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
3474 {
3475  MOVContext *mov = s->priv_data;
3476  MOVStreamContext *sc;
3477  AVIndexEntry *sample;
3478  AVStream *st = NULL;
3479  int ret;
3480  mov->fc = s;
3481  retry:
3482  sample = mov_find_next_sample(s, &st);
3483  if (!sample) {
3484  mov->found_mdat = 0;
3485  if (!mov->next_root_atom)
3486  return AVERROR_EOF;
3487  avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
3488  mov->next_root_atom = 0;
3489  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
3490  url_feof(s->pb))
3491  return AVERROR_EOF;
3492  av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
3493  goto retry;
3494  }
3495  sc = st->priv_data;
3496  /* must be done just before reading, to avoid infinite loop on sample */
3497  sc->current_sample++;
3498 
3499  if (mov->next_root_atom) {
3500  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
3501  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
3502  }
3503 
3504  if (st->discard != AVDISCARD_ALL) {
3505  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3506  av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
3507  sc->ffindex, sample->pos);
3508  return AVERROR_INVALIDDATA;
3509  }
3510  ret = av_get_packet(sc->pb, pkt, sample->size);
3511  if (ret < 0)
3512  return ret;
3513  if (sc->has_palette) {
3514  uint8_t *pal;
3515 
3516  pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
3517  if (!pal) {
3518  av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
3519  } else {
3520  memcpy(pal, sc->palette, AVPALETTE_SIZE);
3521  sc->has_palette = 0;
3522  }
3523  }
3524 #if CONFIG_DV_DEMUXER
3525  if (mov->dv_demux && sc->dv_audio_container) {
3526  avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
3527  av_free(pkt->data);
3528  pkt->size = 0;
3529  ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
3530  if (ret < 0)
3531  return ret;
3532  }
3533 #endif
3534  }
3535 
3536  pkt->stream_index = sc->ffindex;
3537  pkt->dts = sample->timestamp;
3538  if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
3539  pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
3540  /* update ctts context */
3541  sc->ctts_sample++;
3542  if (sc->ctts_index < sc->ctts_count &&
3543  sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
3544  sc->ctts_index++;
3545  sc->ctts_sample = 0;
3546  }
3547  if (sc->wrong_dts)
3548  pkt->dts = AV_NOPTS_VALUE;
3549  } else {
3550  int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
3551  st->index_entries[sc->current_sample].timestamp : st->duration;
3552  pkt->duration = next_dts - pkt->dts;
3553  pkt->pts = pkt->dts;
3554  }
3555  if (st->discard == AVDISCARD_ALL)
3556  goto retry;
3557  pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
3558  pkt->pos = sample->pos;
3559  av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
3560  pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
3561  return 0;
3562 }
3563 
3564 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
3565 {
3566  MOVStreamContext *sc = st->priv_data;
3567  int sample, time_sample;
3568  int i;
3569 
3570  sample = av_index_search_timestamp(st, timestamp, flags);
3571  av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
3572  if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
3573  sample = 0;
3574  if (sample < 0) /* not sure what to do */
3575  return AVERROR_INVALIDDATA;
3576  sc->current_sample = sample;
3577  av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
3578  /* adjust ctts index */
3579  if (sc->ctts_data) {
3580  time_sample = 0;
3581  for (i = 0; i < sc->ctts_count; i++) {
3582  int next = time_sample + sc->ctts_data[i].count;
3583  if (next > sc->current_sample) {
3584  sc->ctts_index = i;
3585  sc->ctts_sample = sc->current_sample - time_sample;
3586  break;
3587  }
3588  time_sample = next;
3589  }
3590  }
3591  return sample;
3592 }
3593 
3594 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3595 {
3596  AVStream *st;
3597  int64_t seek_timestamp, timestamp;
3598  int sample;
3599  int i;
3600 
3601  if (stream_index >= s->nb_streams)
3602  return AVERROR_INVALIDDATA;
3603 
3604  st = s->streams[stream_index];
3605  sample = mov_seek_stream(s, st, sample_time, flags);
3606  if (sample < 0)
3607  return sample;
3608 
3609  /* adjust seek timestamp to found sample timestamp */
3610  seek_timestamp = st->index_entries[sample].timestamp;
3611 
3612  for (i = 0; i < s->nb_streams; i++) {
3613  MOVStreamContext *sc = s->streams[i]->priv_data;
3614  st = s->streams[i];
3615  st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
3616 
3617  if (stream_index == i)
3618  continue;
3619 
3620  timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
3621  mov_seek_stream(s, st, timestamp, flags);
3622  }
3623  return 0;
3624 }
3625 
3626 static const AVOption options[] = {
3627  {"use_absolute_path",
3628  "allow using absolute path when opening alias, this is a possible security issue",
3629  offsetof(MOVContext, use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
3630  0, 1, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_DECODING_PARAM},
3631  {"ignore_editlist", "", offsetof(MOVContext, ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
3632  0, 1, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_DECODING_PARAM},
3633  {NULL}
3634 };
3635 
3636 static const AVClass mov_class = {
3637  .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
3638  .item_name = av_default_item_name,
3639  .option = options,
3640  .version = LIBAVUTIL_VERSION_INT,
3641 };
3642 
3643 AVInputFormat ff_mov_demuxer = {
3644  .name = "mov,mp4,m4a,3gp,3g2,mj2",
3645  .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
3646  .priv_data_size = sizeof(MOVContext),
3647  .read_probe = mov_probe,
3648  .read_header = mov_read_header,
3649  .read_packet = mov_read_packet,
3650  .read_close = mov_read_close,
3651  .read_seek = mov_read_seek,
3652  .priv_class = &mov_class,
3653  .flags = AVFMT_NO_BYTE_SEEK,
3654 };
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