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mov.c
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1 /*
2  * MOV demuxer
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5  *
6  * first version by Francois Revol <revol@free.fr>
7  * seek function by Gael Chardon <gael.dev@4now.net>
8  *
9  * This file is part of FFmpeg.
10  *
11  * FFmpeg is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * FFmpeg is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with FFmpeg; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
26 #include <inttypes.h>
27 #include <limits.h>
28 #include <stdint.h>
29 
30 //#define MOV_EXPORT_ALL_METADATA
31 
32 #include "libavutil/attributes.h"
33 #include "libavutil/channel_layout.h"
34 #include "libavutil/display.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/intfloat.h"
37 #include "libavutil/mathematics.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/dict.h"
40 #include "libavutil/opt.h"
41 #include "libavutil/timecode.h"
42 #include "libavcodec/ac3tab.h"
43 #include "avformat.h"
44 #include "internal.h"
45 #include "avio_internal.h"
46 #include "riff.h"
47 #include "isom.h"
48 #include "libavcodec/get_bits.h"
49 #include "id3v1.h"
50 #include "mov_chan.h"
51 #include "replaygain.h"
52 
53 #if CONFIG_ZLIB
54 #include <zlib.h>
55 #endif
56 
57 #include "qtpalette.h"
58 
59 
60 #undef NDEBUG
61 #include <assert.h>
62 
63 /* those functions parse an atom */
64 /* links atom IDs to parse functions */
65 typedef struct MOVParseTableEntry {
66  uint32_t type;
67  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
68 } MOVParseTableEntry;
69 
70 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
71 
72 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
73  unsigned len, const char *key)
74 {
75  char buf[16];
76 
77  short current, total = 0;
78  avio_rb16(pb); // unknown
79  current = avio_rb16(pb);
80  if (len >= 6)
81  total = avio_rb16(pb);
82  if (!total)
83  snprintf(buf, sizeof(buf), "%d", current);
84  else
85  snprintf(buf, sizeof(buf), "%d/%d", current, total);
86  av_dict_set(&c->fc->metadata, key, buf, 0);
87 
88  return 0;
89 }
90 
91 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
92  unsigned len, const char *key)
93 {
94  char buf[16];
95 
96  /* bypass padding bytes */
97  avio_r8(pb);
98  avio_r8(pb);
99  avio_r8(pb);
100 
101  snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
102  av_dict_set(&c->fc->metadata, key, buf, 0);
103 
104  return 0;
105 }
106 
107 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
108  unsigned len, const char *key)
109 {
110  char buf[16];
111 
112  snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
113  av_dict_set(&c->fc->metadata, key, buf, 0);
114 
115  return 0;
116 }
117 
118 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
119  unsigned len, const char *key)
120 {
121  short genre;
122  char buf[20];
123 
124  avio_r8(pb); // unknown
125 
126  genre = avio_r8(pb);
127  if (genre < 1 || genre > ID3v1_GENRE_MAX)
128  return 0;
129  snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
130  av_dict_set(&c->fc->metadata, key, buf, 0);
131 
132  return 0;
133 }
134 
135 static const uint32_t mac_to_unicode[128] = {
136  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
137  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
138  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
139  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
140  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
141  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
142  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
143  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
144  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
145  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
146  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
147  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
148  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
149  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
150  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
151  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
152 };
153 
154 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
155  char *dst, int dstlen)
156 {
157  char *p = dst;
158  char *end = dst+dstlen-1;
159  int i;
160 
161  for (i = 0; i < len; i++) {
162  uint8_t t, c = avio_r8(pb);
163  if (c < 0x80 && p < end)
164  *p++ = c;
165  else if (p < end)
166  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
167  }
168  *p = 0;
169  return p - dst;
170 }
171 
172 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
173 {
174  AVPacket pkt;
175  AVStream *st;
176  MOVStreamContext *sc;
177  enum AVCodecID id;
178  int ret;
179 
180  switch (type) {
181  case 0xd: id = AV_CODEC_ID_MJPEG; break;
182  case 0xe: id = AV_CODEC_ID_PNG; break;
183  case 0x1b: id = AV_CODEC_ID_BMP; break;
184  default:
185  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
186  avio_skip(pb, len);
187  return 0;
188  }
189 
190  st = avformat_new_stream(c->fc, NULL);
191  if (!st)
192  return AVERROR(ENOMEM);
193  sc = av_mallocz(sizeof(*sc));
194  if (!sc)
195  return AVERROR(ENOMEM);
196  st->priv_data = sc;
197 
198  ret = av_get_packet(pb, &pkt, len);
199  if (ret < 0)
200  return ret;
201 
202  st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
203 
204  st->attached_pic = pkt;
205  st->attached_pic.stream_index = st->index;
206  st->attached_pic.flags |= AV_PKT_FLAG_KEY;
207 
208  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
209  st->codec->codec_id = id;
210 
211  return 0;
212 }
213 
214 static int mov_metadata_raw(MOVContext *c, AVIOContext *pb,
215  unsigned len, const char *key)
216 {
217  char *value = av_malloc(len + 1);
218  if (!value)
219  return AVERROR(ENOMEM);
220  avio_read(pb, value, len);
221  value[len] = 0;
222  return av_dict_set(&c->fc->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
223 }
224 
225 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
226 {
227  char language[4] = { 0 };
228  char buf[100];
229  uint16_t langcode = 0;
230  double longitude, latitude;
231  const char *key = "location";
232 
233  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4)
234  return AVERROR_INVALIDDATA;
235 
236  avio_skip(pb, 4); // version+flags
237  langcode = avio_rb16(pb);
238  ff_mov_lang_to_iso639(langcode, language);
239  len -= 6;
240 
241  len -= avio_get_str(pb, len, buf, sizeof(buf)); // place name
242  if (len < 1)
243  return AVERROR_INVALIDDATA;
244  avio_skip(pb, 1); // role
245  len -= 1;
246 
247  if (len < 14)
248  return AVERROR_INVALIDDATA;
249  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
250  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
251 
252  // Try to output in the same format as the ?xyz field
253  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f/", latitude, longitude);
254  if (*language && strcmp(language, "und")) {
255  char key2[16];
256  snprintf(key2, sizeof(key2), "%s-%s", key, language);
257  av_dict_set(&c->fc->metadata, key2, buf, 0);
258  }
259  return av_dict_set(&c->fc->metadata, key, buf, 0);
260 }
261 
262 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
263 {
264 #ifdef MOV_EXPORT_ALL_METADATA
265  char tmp_key[5];
266 #endif
267  char str[1024], key2[16], language[4] = {0};
268  const char *key = NULL;
269  uint16_t langcode = 0;
270  uint32_t data_type = 0, str_size;
271  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
272 
273  switch (atom.type) {
274  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
275  case MKTAG(0xa9,'a','u','t'):
276  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
277  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
278  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
279  case MKTAG( 'c','p','i','l'): key = "compilation";
280  parse = mov_metadata_int8_no_padding; break;
281  case MKTAG( 'c','p','r','t'):
282  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
283  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
284  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
285  case MKTAG(0xa9,'c','m','t'):
286  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
287  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
288  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
289  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
290  case MKTAG( 'g','n','r','e'): key = "genre";
291  parse = mov_metadata_gnre; break;
292  case MKTAG(0xa9,'t','o','o'):
293  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
294  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
295  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
296  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
297  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
298  case MKTAG( 'd','e','s','c'): key = "description";break;
299  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
300  case MKTAG( 't','v','s','h'): key = "show"; break;
301  case MKTAG( 't','v','e','n'): key = "episode_id";break;
302  case MKTAG( 't','v','n','n'): key = "network"; break;
303  case MKTAG( 't','r','k','n'): key = "track";
304  parse = mov_metadata_track_or_disc_number; break;
305  case MKTAG( 'd','i','s','k'): key = "disc";
306  parse = mov_metadata_track_or_disc_number; break;
307  case MKTAG( 't','v','e','s'): key = "episode_sort";
308  parse = mov_metadata_int8_bypass_padding; break;
309  case MKTAG( 't','v','s','n'): key = "season_number";
310  parse = mov_metadata_int8_bypass_padding; break;
311  case MKTAG( 's','t','i','k'): key = "media_type";
312  parse = mov_metadata_int8_no_padding; break;
313  case MKTAG( 'h','d','v','d'): key = "hd_video";
314  parse = mov_metadata_int8_no_padding; break;
315  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
316  parse = mov_metadata_int8_no_padding; break;
317  case MKTAG( '@','P','R','M'):
318  return mov_metadata_raw(c, pb, atom.size, "premiere_version");
319  case MKTAG( '@','P','R','Q'):
320  return mov_metadata_raw(c, pb, atom.size, "quicktime_version");
321  case MKTAG( 'l','o','c','i'):
322  return mov_metadata_loci(c, pb, atom.size);
323  }
324 
325  if (c->itunes_metadata && atom.size > 8) {
326  int data_size = avio_rb32(pb);
327  int tag = avio_rl32(pb);
328  if (tag == MKTAG('d','a','t','a')) {
329  data_type = avio_rb32(pb); // type
330  avio_rb32(pb); // unknown
331  str_size = data_size - 16;
332  atom.size -= 16;
333 
334  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
335  int ret = mov_read_covr(c, pb, data_type, str_size);
336  if (ret < 0) {
337  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
338  }
339  return ret;
340  }
341  } else return 0;
342  } else if (atom.size > 4 && key && !c->itunes_metadata) {
343  str_size = avio_rb16(pb); // string length
344  langcode = avio_rb16(pb);
345  ff_mov_lang_to_iso639(langcode, language);
346  atom.size -= 4;
347  } else
348  str_size = atom.size;
349 
350 #ifdef MOV_EXPORT_ALL_METADATA
351  if (!key) {
352  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
353  key = tmp_key;
354  }
355 #endif
356 
357  if (!key)
358  return 0;
359  if (atom.size < 0)
360  return AVERROR_INVALIDDATA;
361 
362  str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
363 
364  if (parse)
365  parse(c, pb, str_size, key);
366  else {
367  if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
368  mov_read_mac_string(c, pb, str_size, str, sizeof(str));
369  } else {
370  int ret = avio_read(pb, str, str_size);
371  if (ret != str_size)
372  return ret < 0 ? ret : AVERROR_INVALIDDATA;
373  str[str_size] = 0;
374  }
375  av_dict_set(&c->fc->metadata, key, str, 0);
376  if (*language && strcmp(language, "und")) {
377  snprintf(key2, sizeof(key2), "%s-%s", key, language);
378  av_dict_set(&c->fc->metadata, key2, str, 0);
379  }
380  }
381  av_dlog(c->fc, "lang \"%3s\" ", language);
382  av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
383  key, str, (char*)&atom.type, str_size, atom.size);
384 
385  return 0;
386 }
387 
388 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
389 {
390  int64_t start;
391  int i, nb_chapters, str_len, version;
392  char str[256+1];
393 
394  if ((atom.size -= 5) < 0)
395  return 0;
396 
397  version = avio_r8(pb);
398  avio_rb24(pb);
399  if (version)
400  avio_rb32(pb); // ???
401  nb_chapters = avio_r8(pb);
402 
403  for (i = 0; i < nb_chapters; i++) {
404  if (atom.size < 9)
405  return 0;
406 
407  start = avio_rb64(pb);
408  str_len = avio_r8(pb);
409 
410  if ((atom.size -= 9+str_len) < 0)
411  return 0;
412 
413  avio_read(pb, str, str_len);
414  str[str_len] = 0;
415  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
416  }
417  return 0;
418 }
419 
420 #define MIN_DATA_ENTRY_BOX_SIZE 12
421 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
422 {
423  AVStream *st;
424  MOVStreamContext *sc;
425  int entries, i, j;
426 
427  if (c->fc->nb_streams < 1)
428  return 0;
429  st = c->fc->streams[c->fc->nb_streams-1];
430  sc = st->priv_data;
431 
432  avio_rb32(pb); // version + flags
433  entries = avio_rb32(pb);
434  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
435  entries >= UINT_MAX / sizeof(*sc->drefs))
436  return AVERROR_INVALIDDATA;
437  av_free(sc->drefs);
438  sc->drefs_count = 0;
439  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
440  if (!sc->drefs)
441  return AVERROR(ENOMEM);
442  sc->drefs_count = entries;
443 
444  for (i = 0; i < sc->drefs_count; i++) {
445  MOVDref *dref = &sc->drefs[i];
446  uint32_t size = avio_rb32(pb);
447  int64_t next = avio_tell(pb) + size - 4;
448 
449  if (size < 12)
450  return AVERROR_INVALIDDATA;
451 
452  dref->type = avio_rl32(pb);
453  avio_rb32(pb); // version + flags
454  av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
455 
456  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
457  /* macintosh alias record */
458  uint16_t volume_len, len;
459  int16_t type;
460 
461  avio_skip(pb, 10);
462 
463  volume_len = avio_r8(pb);
464  volume_len = FFMIN(volume_len, 27);
465  avio_read(pb, dref->volume, 27);
466  dref->volume[volume_len] = 0;
467  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
468 
469  avio_skip(pb, 12);
470 
471  len = avio_r8(pb);
472  len = FFMIN(len, 63);
473  avio_read(pb, dref->filename, 63);
474  dref->filename[len] = 0;
475  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
476 
477  avio_skip(pb, 16);
478 
479  /* read next level up_from_alias/down_to_target */
480  dref->nlvl_from = avio_rb16(pb);
481  dref->nlvl_to = avio_rb16(pb);
482  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
483  dref->nlvl_from, dref->nlvl_to);
484 
485  avio_skip(pb, 16);
486 
487  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
488  if(url_feof(pb))
489  return AVERROR_EOF;
490  type = avio_rb16(pb);
491  len = avio_rb16(pb);
492  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
493  if (len&1)
494  len += 1;
495  if (type == 2) { // absolute path
496  av_free(dref->path);
497  dref->path = av_mallocz(len+1);
498  if (!dref->path)
499  return AVERROR(ENOMEM);
500  avio_read(pb, dref->path, len);
501  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
502  len -= volume_len;
503  memmove(dref->path, dref->path+volume_len, len);
504  dref->path[len] = 0;
505  }
506  for (j = 0; j < len; j++)
507  if (dref->path[j] == ':')
508  dref->path[j] = '/';
509  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
510  } else if (type == 0) { // directory name
511  av_free(dref->dir);
512  dref->dir = av_malloc(len+1);
513  if (!dref->dir)
514  return AVERROR(ENOMEM);
515  if (avio_read(pb, dref->dir, len) != len)
516  return AVERROR_INVALIDDATA;
517  dref->dir[len] = 0;
518  for (j = 0; j < len; j++)
519  if (dref->dir[j] == ':')
520  dref->dir[j] = '/';
521  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
522  } else
523  avio_skip(pb, len);
524  }
525  }
526  avio_seek(pb, next, SEEK_SET);
527  }
528  return 0;
529 }
530 
531 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
532 {
533  AVStream *st;
534  uint32_t type;
535  uint32_t av_unused ctype;
536  int title_size;
537  char *title_str;
538 
539  if (c->fc->nb_streams < 1) // meta before first trak
540  return 0;
541 
542  st = c->fc->streams[c->fc->nb_streams-1];
543 
544  avio_r8(pb); /* version */
545  avio_rb24(pb); /* flags */
546 
547  /* component type */
548  ctype = avio_rl32(pb);
549  type = avio_rl32(pb); /* component subtype */
550 
551  av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
552  av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
553 
554  if (type == MKTAG('v','i','d','e'))
555  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
556  else if (type == MKTAG('s','o','u','n'))
557  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
558  else if (type == MKTAG('m','1','a',' '))
559  st->codec->codec_id = AV_CODEC_ID_MP2;
560  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
561  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
562 
563  avio_rb32(pb); /* component manufacture */
564  avio_rb32(pb); /* component flags */
565  avio_rb32(pb); /* component flags mask */
566 
567  title_size = atom.size - 24;
568  if (title_size > 0) {
569  title_str = av_malloc(title_size + 1); /* Add null terminator */
570  if (!title_str)
571  return AVERROR(ENOMEM);
572  avio_read(pb, title_str, title_size);
573  title_str[title_size] = 0;
574  if (title_str[0])
575  av_dict_set(&st->metadata, "handler_name", title_str +
576  (!c->isom && title_str[0] == title_size - 1), 0);
577  av_freep(&title_str);
578  }
579 
580  return 0;
581 }
582 
583 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
584 {
585  AVStream *st;
586  int tag;
587 
588  if (fc->nb_streams < 1)
589  return 0;
590  st = fc->streams[fc->nb_streams-1];
591 
592  avio_rb32(pb); /* version + flags */
593  ff_mp4_read_descr(fc, pb, &tag);
594  if (tag == MP4ESDescrTag) {
595  ff_mp4_parse_es_descr(pb, NULL);
596  } else
597  avio_rb16(pb); /* ID */
598 
599  ff_mp4_read_descr(fc, pb, &tag);
600  if (tag == MP4DecConfigDescrTag)
601  ff_mp4_read_dec_config_descr(fc, st, pb);
602  return 0;
603 }
604 
605 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
606 {
607  return ff_mov_read_esds(c->fc, pb, atom);
608 }
609 
610 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
611 {
612  AVStream *st;
613  int ac3info, acmod, lfeon, bsmod;
614 
615  if (c->fc->nb_streams < 1)
616  return 0;
617  st = c->fc->streams[c->fc->nb_streams-1];
618 
619  ac3info = avio_rb24(pb);
620  bsmod = (ac3info >> 14) & 0x7;
621  acmod = (ac3info >> 11) & 0x7;
622  lfeon = (ac3info >> 10) & 0x1;
623  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
624  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
625  if (lfeon)
626  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
627  st->codec->audio_service_type = bsmod;
628  if (st->codec->channels > 1 && bsmod == 0x7)
629  st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
630 
631  return 0;
632 }
633 
634 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
635 {
636  AVStream *st;
637  int eac3info, acmod, lfeon, bsmod;
638 
639  if (c->fc->nb_streams < 1)
640  return 0;
641  st = c->fc->streams[c->fc->nb_streams-1];
642 
643  /* No need to parse fields for additional independent substreams and its
644  * associated dependent substreams since libavcodec's E-AC-3 decoder
645  * does not support them yet. */
646  avio_rb16(pb); /* data_rate and num_ind_sub */
647  eac3info = avio_rb24(pb);
648  bsmod = (eac3info >> 12) & 0x1f;
649  acmod = (eac3info >> 9) & 0x7;
650  lfeon = (eac3info >> 8) & 0x1;
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->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
655  st->codec->audio_service_type = bsmod;
656  if (st->codec->channels > 1 && bsmod == 0x7)
657  st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
658 
659  return 0;
660 }
661 
662 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
663 {
664  AVStream *st;
665 
666  if (c->fc->nb_streams < 1)
667  return 0;
668  st = c->fc->streams[c->fc->nb_streams-1];
669 
670  if (atom.size < 16)
671  return 0;
672 
673  /* skip version and flags */
674  avio_skip(pb, 4);
675 
676  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
677 
678  return 0;
679 }
680 
681 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
682 {
683  AVStream *st;
684 
685  if (c->fc->nb_streams < 1)
686  return 0;
687  st = c->fc->streams[c->fc->nb_streams-1];
688 
689  if (ff_get_wav_header(pb, st->codec, atom.size) < 0) {
690  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
691  }
692 
693  return 0;
694 }
695 
696 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
697 {
698  const int num = avio_rb32(pb);
699  const int den = avio_rb32(pb);
700  AVStream *st;
701 
702  if (c->fc->nb_streams < 1)
703  return 0;
704  st = c->fc->streams[c->fc->nb_streams-1];
705 
706  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
707  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
708  av_log(c->fc, AV_LOG_WARNING,
709  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
710  st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
711  num, den);
712  } else if (den != 0) {
713  st->sample_aspect_ratio.num = num;
714  st->sample_aspect_ratio.den = den;
715  }
716  return 0;
717 }
718 
719 /* this atom contains actual media data */
720 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
721 {
722  if (atom.size == 0) /* wrong one (MP4) */
723  return 0;
724  c->found_mdat=1;
725  return 0; /* now go for moov */
726 }
727 
728 /* read major brand, minor version and compatible brands and store them as metadata */
729 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
730 {
731  uint32_t minor_ver;
732  int comp_brand_size;
733  char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
734  char* comp_brands_str;
735  uint8_t type[5] = {0};
736 
737  avio_read(pb, type, 4);
738  if (strcmp(type, "qt "))
739  c->isom = 1;
740  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
741  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
742  minor_ver = avio_rb32(pb); /* minor version */
743  snprintf(minor_ver_str, sizeof(minor_ver_str), "%"PRIu32"", minor_ver);
744  av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
745 
746  comp_brand_size = atom.size - 8;
747  if (comp_brand_size < 0)
748  return AVERROR_INVALIDDATA;
749  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
750  if (!comp_brands_str)
751  return AVERROR(ENOMEM);
752  avio_read(pb, comp_brands_str, comp_brand_size);
753  comp_brands_str[comp_brand_size] = 0;
754  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
755  av_freep(&comp_brands_str);
756 
757  return 0;
758 }
759 
760 /* this atom should contain all header atoms */
761 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
762 {
763  int ret;
764 
765  if (c->found_moov) {
766  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
767  avio_skip(pb, atom.size);
768  return 0;
769  }
770 
771  if ((ret = mov_read_default(c, pb, atom)) < 0)
772  return ret;
773  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
774  /* so we don't parse the whole file if over a network */
775  c->found_moov=1;
776  return 0; /* now go for mdat */
777 }
778 
779 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
780 {
781  c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
782  av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
783  return mov_read_default(c, pb, atom);
784 }
785 
786 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
787 {
788  char buffer[32];
789  if (time) {
790  struct tm *ptm;
791  time_t timet;
792  if(time >= 2082844800)
793  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
794  timet = time;
795  ptm = gmtime(&timet);
796  if (!ptm) return;
797  strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
798  av_dict_set(metadata, "creation_time", buffer, 0);
799  }
800 }
801 
802 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
803 {
804  AVStream *st;
805  MOVStreamContext *sc;
806  int version;
807  char language[4] = {0};
808  unsigned lang;
809  int64_t creation_time;
810 
811  if (c->fc->nb_streams < 1)
812  return 0;
813  st = c->fc->streams[c->fc->nb_streams-1];
814  sc = st->priv_data;
815 
816  if (sc->time_scale) {
817  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
818  return AVERROR_INVALIDDATA;
819  }
820 
821  version = avio_r8(pb);
822  if (version > 1) {
823  avpriv_request_sample(c->fc, "Version %d", version);
824  return AVERROR_PATCHWELCOME;
825  }
826  avio_rb24(pb); /* flags */
827  if (version == 1) {
828  creation_time = avio_rb64(pb);
829  avio_rb64(pb);
830  } else {
831  creation_time = avio_rb32(pb);
832  avio_rb32(pb); /* modification time */
833  }
834  mov_metadata_creation_time(&st->metadata, creation_time);
835 
836  sc->time_scale = avio_rb32(pb);
837  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
838 
839  lang = avio_rb16(pb); /* language */
840  if (ff_mov_lang_to_iso639(lang, language))
841  av_dict_set(&st->metadata, "language", language, 0);
842  avio_rb16(pb); /* quality */
843 
844  return 0;
845 }
846 
847 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
848 {
849  int64_t creation_time;
850  int version = avio_r8(pb); /* version */
851  avio_rb24(pb); /* flags */
852 
853  if (version == 1) {
854  creation_time = avio_rb64(pb);
855  avio_rb64(pb);
856  } else {
857  creation_time = avio_rb32(pb);
858  avio_rb32(pb); /* modification time */
859  }
860  mov_metadata_creation_time(&c->fc->metadata, creation_time);
861  c->time_scale = avio_rb32(pb); /* time scale */
862 
863  av_dlog(c->fc, "time scale = %i\n", c->time_scale);
864 
865  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
866  // set the AVCodecContext duration because the duration of individual tracks
867  // may be inaccurate
868  if (c->time_scale > 0 && !c->trex_data)
869  c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
870  avio_rb32(pb); /* preferred scale */
871 
872  avio_rb16(pb); /* preferred volume */
873 
874  avio_skip(pb, 10); /* reserved */
875 
876  avio_skip(pb, 36); /* display matrix */
877 
878  avio_rb32(pb); /* preview time */
879  avio_rb32(pb); /* preview duration */
880  avio_rb32(pb); /* poster time */
881  avio_rb32(pb); /* selection time */
882  avio_rb32(pb); /* selection duration */
883  avio_rb32(pb); /* current time */
884  avio_rb32(pb); /* next track ID */
885  return 0;
886 }
887 
888 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
889 {
890  AVStream *st;
891  int little_endian;
892 
893  if (c->fc->nb_streams < 1)
894  return 0;
895  st = c->fc->streams[c->fc->nb_streams-1];
896 
897  little_endian = avio_rb16(pb) & 0xFF;
898  av_dlog(c->fc, "enda %d\n", little_endian);
899  if (little_endian == 1) {
900  switch (st->codec->codec_id) {
901  case AV_CODEC_ID_PCM_S24BE:
902  st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
903  break;
904  case AV_CODEC_ID_PCM_S32BE:
905  st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
906  break;
907  case AV_CODEC_ID_PCM_F32BE:
908  st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
909  break;
910  case AV_CODEC_ID_PCM_F64BE:
911  st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
912  break;
913  default:
914  break;
915  }
916  }
917  return 0;
918 }
919 
920 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
921 {
922  AVStream *st;
923  unsigned mov_field_order;
924  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
925 
926  if (c->fc->nb_streams < 1) // will happen with jp2 files
927  return 0;
928  st = c->fc->streams[c->fc->nb_streams-1];
929  if (atom.size < 2)
930  return AVERROR_INVALIDDATA;
931  mov_field_order = avio_rb16(pb);
932  if ((mov_field_order & 0xFF00) == 0x0100)
933  decoded_field_order = AV_FIELD_PROGRESSIVE;
934  else if ((mov_field_order & 0xFF00) == 0x0200) {
935  switch (mov_field_order & 0xFF) {
936  case 0x01: decoded_field_order = AV_FIELD_TT;
937  break;
938  case 0x06: decoded_field_order = AV_FIELD_BB;
939  break;
940  case 0x09: decoded_field_order = AV_FIELD_TB;
941  break;
942  case 0x0E: decoded_field_order = AV_FIELD_BT;
943  break;
944  }
945  }
946  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
947  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
948  }
949  st->codec->field_order = decoded_field_order;
950 
951  return 0;
952 }
953 
954 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
955 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
956  enum AVCodecID codec_id)
957 {
958  AVStream *st;
959  uint64_t size;
960  uint8_t *buf;
961  int err;
962 
963  if (c->fc->nb_streams < 1) // will happen with jp2 files
964  return 0;
965  st= c->fc->streams[c->fc->nb_streams-1];
966 
967  if (st->codec->codec_id != codec_id)
968  return 0; /* unexpected codec_id - don't mess with extradata */
969 
970  size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
971  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
972  return AVERROR_INVALIDDATA;
973  if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
974  st->codec->extradata_size = 0;
975  return err;
976  }
977  buf = st->codec->extradata + st->codec->extradata_size;
978  st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
979  AV_WB32( buf , atom.size + 8);
980  AV_WL32( buf + 4, atom.type);
981  err = avio_read(pb, buf + 8, atom.size);
982  if (err < 0) {
983  return err;
984  } else if (err < atom.size) {
985  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
986  st->codec->extradata_size -= atom.size - err;
987  }
988  memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
989  return 0;
990 }
991 
992 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
993 static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
994 {
995  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
996 }
997 
998 static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
999 {
1000  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1001 }
1002 
1003 static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1004 {
1005  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1006 }
1007 
1008 static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1009 {
1010  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1011 }
1012 
1013 static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1014 {
1015  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1016 
1017  if (!ret && c->fc->nb_streams >= 1) {
1018  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1019  if (avctx->extradata_size >= 40) {
1020  avctx->height = AV_RB16(&avctx->extradata[36]);
1021  avctx->width = AV_RB16(&avctx->extradata[38]);
1022  }
1023  }
1024  return ret;
1025 }
1026 
1027 static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1028 {
1029  if (c->fc->nb_streams >= 1) {
1030  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1031  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1032  codec->codec_id == AV_CODEC_ID_H264 &&
1033  atom.size > 11) {
1034  avio_skip(pb, 10);
1035  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1036  if (avio_rb16(pb) == 0xd4d)
1037  codec->width = 1440;
1038  return 0;
1039  }
1040  }
1041 
1042  return mov_read_avid(c, pb, atom);
1043 }
1044 
1045 static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1046 {
1047  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1048 }
1049 
1050 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1051 {
1052  AVStream *st;
1053 
1054  if (c->fc->nb_streams < 1)
1055  return 0;
1056  st = c->fc->streams[c->fc->nb_streams-1];
1057 
1058  if ((uint64_t)atom.size > (1<<30))
1059  return AVERROR_INVALIDDATA;
1060 
1061  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1062  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1063  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1064  // pass all frma atom to codec, needed at least for QDMC and QDM2
1065  av_free(st->codec->extradata);
1066  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1067  return AVERROR(ENOMEM);
1068  } else if (atom.size > 8) { /* to read frma, esds atoms */
1069  int ret;
1070  if ((ret = mov_read_default(c, pb, atom)) < 0)
1071  return ret;
1072  } else
1073  avio_skip(pb, atom.size);
1074  return 0;
1075 }
1076 
1077 /**
1078  * This function reads atom content and puts data in extradata without tag
1079  * nor size unlike mov_read_extradata.
1080  */
1081 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1082 {
1083  AVStream *st;
1084 
1085  if (c->fc->nb_streams < 1)
1086  return 0;
1087  st = c->fc->streams[c->fc->nb_streams-1];
1088 
1089  if ((uint64_t)atom.size > (1<<30))
1090  return AVERROR_INVALIDDATA;
1091 
1092  if (atom.size >= 10) {
1093  // Broken files created by legacy versions of libavformat will
1094  // wrap a whole fiel atom inside of a glbl atom.
1095  unsigned size = avio_rb32(pb);
1096  unsigned type = avio_rl32(pb);
1097  avio_seek(pb, -8, SEEK_CUR);
1098  if (type == MKTAG('f','i','e','l') && size == atom.size)
1099  return mov_read_default(c, pb, atom);
1100  }
1101  av_free(st->codec->extradata);
1102  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1103  return AVERROR(ENOMEM);
1104 
1105  return 0;
1106 }
1107 
1108 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1109 {
1110  AVStream *st;
1111  uint8_t profile_level;
1112  int ret;
1113 
1114  if (c->fc->nb_streams < 1)
1115  return 0;
1116  st = c->fc->streams[c->fc->nb_streams-1];
1117 
1118  if (atom.size >= (1<<28) || atom.size < 7)
1119  return AVERROR_INVALIDDATA;
1120 
1121  profile_level = avio_r8(pb);
1122  if ((profile_level & 0xf0) != 0xc0)
1123  return 0;
1124 
1125  avio_seek(pb, 6, SEEK_CUR);
1126  av_free(st->codec->extradata);
1127  if ((ret = ff_get_extradata(st->codec, pb, atom.size - 7)) < 0)
1128  return ret;
1129 
1130  return 0;
1131 }
1132 
1133 /**
1134  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1135  * but can have extradata appended at the end after the 40 bytes belonging
1136  * to the struct.
1137  */
1138 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1139 {
1140  AVStream *st;
1141 
1142  if (c->fc->nb_streams < 1)
1143  return 0;
1144  if (atom.size <= 40)
1145  return 0;
1146  st = c->fc->streams[c->fc->nb_streams-1];
1147 
1148  if ((uint64_t)atom.size > (1<<30))
1149  return AVERROR_INVALIDDATA;
1150 
1151  avio_skip(pb, 40);
1152  av_free(st->codec->extradata);
1153  if (ff_get_extradata(st->codec, pb, atom.size - 40) < 0)
1154  return AVERROR(ENOMEM);
1155  return 0;
1156 }
1157 
1158 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1159 {
1160  AVStream *st;
1161  MOVStreamContext *sc;
1162  unsigned int i, entries;
1163 
1164  if (c->fc->nb_streams < 1)
1165  return 0;
1166  st = c->fc->streams[c->fc->nb_streams-1];
1167  sc = st->priv_data;
1168 
1169  avio_r8(pb); /* version */
1170  avio_rb24(pb); /* flags */
1171 
1172  entries = avio_rb32(pb);
1173 
1174  if (!entries)
1175  return 0;
1176  if (entries >= UINT_MAX/sizeof(int64_t))
1177  return AVERROR_INVALIDDATA;
1178 
1179  sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1180  if (!sc->chunk_offsets)
1181  return AVERROR(ENOMEM);
1182  sc->chunk_count = entries;
1183 
1184  if (atom.type == MKTAG('s','t','c','o'))
1185  for (i = 0; i < entries && !pb->eof_reached; i++)
1186  sc->chunk_offsets[i] = avio_rb32(pb);
1187  else if (atom.type == MKTAG('c','o','6','4'))
1188  for (i = 0; i < entries && !pb->eof_reached; i++)
1189  sc->chunk_offsets[i] = avio_rb64(pb);
1190  else
1191  return AVERROR_INVALIDDATA;
1192 
1193  sc->chunk_count = i;
1194 
1195  if (pb->eof_reached)
1196  return AVERROR_EOF;
1197 
1198  return 0;
1199 }
1200 
1201 /**
1202  * Compute codec id for 'lpcm' tag.
1203  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1204  */
1205 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1206 {
1207  /* lpcm flags:
1208  * 0x1 = float
1209  * 0x2 = big-endian
1210  * 0x4 = signed
1211  */
1212  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1213 }
1214 
1215 static int mov_codec_id(AVStream *st, uint32_t format)
1216 {
1217  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1218 
1219  if (id <= 0 &&
1220  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1221  (format & 0xFFFF) == 'T' + ('S' << 8)))
1222  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1223 
1224  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1225  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1226  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1227  /* skip old asf mpeg4 tag */
1228  format && format != MKTAG('m','p','4','s')) {
1229  id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1230  if (id <= 0)
1231  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1232  if (id > 0)
1233  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1234  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1235  (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1236  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1237  id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1238  if (id > 0)
1239  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1240  }
1241  }
1242 
1243  st->codec->codec_tag = format;
1244 
1245  return id;
1246 }
1247 
1248 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1249  AVStream *st, MOVStreamContext *sc)
1250 {
1251  uint8_t codec_name[32];
1252  unsigned int color_depth, len, j;
1253  int color_greyscale;
1254  int color_table_id;
1255 
1256  avio_rb16(pb); /* version */
1257  avio_rb16(pb); /* revision level */
1258  avio_rb32(pb); /* vendor */
1259  avio_rb32(pb); /* temporal quality */
1260  avio_rb32(pb); /* spatial quality */
1261 
1262  st->codec->width = avio_rb16(pb); /* width */
1263  st->codec->height = avio_rb16(pb); /* height */
1264 
1265  avio_rb32(pb); /* horiz resolution */
1266  avio_rb32(pb); /* vert resolution */
1267  avio_rb32(pb); /* data size, always 0 */
1268  avio_rb16(pb); /* frames per samples */
1269 
1270  len = avio_r8(pb); /* codec name, pascal string */
1271  if (len > 31)
1272  len = 31;
1273  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1274  if (len < 31)
1275  avio_skip(pb, 31 - len);
1276 
1277  if (codec_name[0])
1278  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1279 
1280  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1281  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1282  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1283  st->codec->width &= ~1;
1284  st->codec->height &= ~1;
1285  }
1286  /* Flash Media Server uses tag H263 with Sorenson Spark */
1287  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1288  !memcmp(codec_name, "Sorenson H263", 13))
1289  st->codec->codec_id = AV_CODEC_ID_FLV1;
1290 
1291  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1292  color_table_id = avio_rb16(pb); /* colortable id */
1293  av_dlog(c->fc, "depth %d, ctab id %d\n",
1294  st->codec->bits_per_coded_sample, color_table_id);
1295  /* figure out the palette situation */
1296  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1297  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1298  /* Do not create a greyscale palette for cinepak */
1299  if (color_greyscale && st->codec->codec_id == AV_CODEC_ID_CINEPAK)
1300  return;
1301 
1302  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1303  if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1304  /* for palette traversal */
1305  unsigned int color_start, color_count, color_end;
1306  unsigned char a, r, g, b;
1307 
1308  if (color_greyscale) {
1309  int color_index, color_dec;
1310  /* compute the greyscale palette */
1311  st->codec->bits_per_coded_sample = color_depth;
1312  color_count = 1 << color_depth;
1313  color_index = 255;
1314  color_dec = 256 / (color_count - 1);
1315  for (j = 0; j < color_count; j++) {
1316  r = g = b = color_index;
1317  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1318  color_index -= color_dec;
1319  if (color_index < 0)
1320  color_index = 0;
1321  }
1322  } else if (color_table_id) {
1323  const uint8_t *color_table;
1324  /* if flag bit 3 is set, use the default palette */
1325  color_count = 1 << color_depth;
1326  if (color_depth == 2)
1327  color_table = ff_qt_default_palette_4;
1328  else if (color_depth == 4)
1329  color_table = ff_qt_default_palette_16;
1330  else
1331  color_table = ff_qt_default_palette_256;
1332 
1333  for (j = 0; j < color_count; j++) {
1334  r = color_table[j * 3 + 0];
1335  g = color_table[j * 3 + 1];
1336  b = color_table[j * 3 + 2];
1337  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1338  }
1339  } else {
1340  /* load the palette from the file */
1341  color_start = avio_rb32(pb);
1342  color_count = avio_rb16(pb);
1343  color_end = avio_rb16(pb);
1344  if ((color_start <= 255) && (color_end <= 255)) {
1345  for (j = color_start; j <= color_end; j++) {
1346  /* each A, R, G, or B component is 16 bits;
1347  * only use the top 8 bits */
1348  a = avio_r8(pb);
1349  avio_r8(pb);
1350  r = avio_r8(pb);
1351  avio_r8(pb);
1352  g = avio_r8(pb);
1353  avio_r8(pb);
1354  b = avio_r8(pb);
1355  avio_r8(pb);
1356  sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1357  }
1358  }
1359  }
1360  sc->has_palette = 1;
1361  }
1362 }
1363 
1364 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1365  AVStream *st, MOVStreamContext *sc)
1366 {
1367  int bits_per_sample, flags;
1368  uint16_t version = avio_rb16(pb);
1369  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1370 
1371  avio_rb16(pb); /* revision level */
1372  avio_rb32(pb); /* vendor */
1373 
1374  st->codec->channels = avio_rb16(pb); /* channel count */
1375  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1376  av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1377 
1378  sc->audio_cid = avio_rb16(pb);
1379  avio_rb16(pb); /* packet size = 0 */
1380 
1381  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1382 
1383  // Read QT version 1 fields. In version 0 these do not exist.
1384  av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
1385  if (!c->isom ||
1386  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1387 
1388  if (version == 1) {
1389  sc->samples_per_frame = avio_rb32(pb);
1390  avio_rb32(pb); /* bytes per packet */
1391  sc->bytes_per_frame = avio_rb32(pb);
1392  avio_rb32(pb); /* bytes per sample */
1393  } else if (version == 2) {
1394  avio_rb32(pb); /* sizeof struct only */
1395  st->codec->sample_rate = av_int2double(avio_rb64(pb));
1396  st->codec->channels = avio_rb32(pb);
1397  avio_rb32(pb); /* always 0x7F000000 */
1398  st->codec->bits_per_coded_sample = avio_rb32(pb);
1399 
1400  flags = avio_rb32(pb); /* lpcm format specific flag */
1401  sc->bytes_per_frame = avio_rb32(pb);
1402  sc->samples_per_frame = avio_rb32(pb);
1403  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1404  st->codec->codec_id =
1405  ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
1406  flags);
1407  }
1408  }
1409 
1410  switch (st->codec->codec_id) {
1411  case AV_CODEC_ID_PCM_S8:
1412  case AV_CODEC_ID_PCM_U8:
1413  if (st->codec->bits_per_coded_sample == 16)
1414  st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1415  break;
1416  case AV_CODEC_ID_PCM_S16LE:
1417  case AV_CODEC_ID_PCM_S16BE:
1418  if (st->codec->bits_per_coded_sample == 8)
1419  st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1420  else if (st->codec->bits_per_coded_sample == 24)
1421  st->codec->codec_id =
1422  st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1423  AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1424  break;
1425  /* set values for old format before stsd version 1 appeared */
1426  case AV_CODEC_ID_MACE3:
1427  sc->samples_per_frame = 6;
1428  sc->bytes_per_frame = 2 * st->codec->channels;
1429  break;
1430  case AV_CODEC_ID_MACE6:
1431  sc->samples_per_frame = 6;
1432  sc->bytes_per_frame = 1 * st->codec->channels;
1433  break;
1434  case AV_CODEC_ID_ADPCM_IMA_QT:
1435  sc->samples_per_frame = 64;
1436  sc->bytes_per_frame = 34 * st->codec->channels;
1437  break;
1438  case AV_CODEC_ID_GSM:
1439  sc->samples_per_frame = 160;
1440  sc->bytes_per_frame = 33;
1441  break;
1442  default:
1443  break;
1444  }
1445 
1446  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1447  if (bits_per_sample) {
1448  st->codec->bits_per_coded_sample = bits_per_sample;
1449  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1450  }
1451 }
1452 
1453 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
1454  AVStream *st, MOVStreamContext *sc,
1455  int size)
1456 {
1457  // ttxt stsd contains display flags, justification, background
1458  // color, fonts, and default styles, so fake an atom to read it
1459  MOVAtom fake_atom = { .size = size };
1460  // mp4s contains a regular esds atom
1461  if (st->codec->codec_tag != AV_RL32("mp4s"))
1462  mov_read_glbl(c, pb, fake_atom);
1463  st->codec->width = sc->width;
1464  st->codec->height = sc->height;
1465 }
1466 
1467 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1468 {
1469  uint8_t r, g, b;
1470  int y, cb, cr;
1471 
1472  y = (ycbcr >> 16) & 0xFF;
1473  cr = (ycbcr >> 8) & 0xFF;
1474  cb = ycbcr & 0xFF;
1475 
1476  b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
1477  g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
1478  r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
1479 
1480  return (r << 16) | (g << 8) | b;
1481 }
1482 
1483 static int mov_rewrite_dvd_sub_extradata(AVStream *st)
1484 {
1485  char buf[256] = {0};
1486  uint8_t *src = st->codec->extradata;
1487  int i;
1488 
1489  if (st->codec->extradata_size != 64)
1490  return 0;
1491 
1492  if (st->codec->width > 0 && st->codec->height > 0)
1493  snprintf(buf, sizeof(buf), "size: %dx%d\n",
1494  st->codec->width, st->codec->height);
1495  av_strlcat(buf, "palette: ", sizeof(buf));
1496 
1497  for (i = 0; i < 16; i++) {
1498  uint32_t yuv = AV_RB32(src + i * 4);
1499  uint32_t rgba = yuv_to_rgba(yuv);
1500 
1501  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1502  }
1503 
1504  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1505  return 0;
1506 
1507  av_freep(&st->codec->extradata);
1508  st->codec->extradata_size = 0;
1509  st->codec->extradata = av_mallocz(strlen(buf) + FF_INPUT_BUFFER_PADDING_SIZE);
1510  if (!st->codec->extradata)
1511  return AVERROR(ENOMEM);
1512  st->codec->extradata_size = strlen(buf);
1513  memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1514 
1515  return 0;
1516 }
1517 
1518 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
1519  AVStream *st, MOVStreamContext *sc,
1520  int size)
1521 {
1522  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1523  if (ff_get_extradata(st->codec, pb, size) < 0)
1524  return AVERROR(ENOMEM);
1525  if (size > 16) {
1526  MOVStreamContext *tmcd_ctx = st->priv_data;
1527  int val;
1528  val = AV_RB32(st->codec->extradata + 4);
1529  tmcd_ctx->tmcd_flags = val;
1530  if (val & 1)
1531  st->codec->flags2 |= CODEC_FLAG2_DROP_FRAME_TIMECODE;
1532  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1533  st->codec->time_base.num = 1;
1534  }
1535  } else {
1536  /* other codec type, just skip (rtp, mp4s ...) */
1537  avio_skip(pb, size);
1538  }
1539  return 0;
1540 }
1541 
1542 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
1543  AVStream *st, MOVStreamContext *sc)
1544 {
1545  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1546  !st->codec->sample_rate && sc->time_scale > 1)
1547  st->codec->sample_rate = sc->time_scale;
1548 
1549  /* special codec parameters handling */
1550  switch (st->codec->codec_id) {
1551 #if CONFIG_DV_DEMUXER
1552  case AV_CODEC_ID_DVAUDIO:
1553  c->dv_fctx = avformat_alloc_context();
1554  c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1555  if (!c->dv_demux) {
1556  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1557  return AVERROR(ENOMEM);
1558  }
1559  sc->dv_audio_container = 1;
1560  st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1561  break;
1562 #endif
1563  /* no ifdef since parameters are always those */
1564  case AV_CODEC_ID_QCELP:
1565  st->codec->channels = 1;
1566  // force sample rate for qcelp when not stored in mov
1567  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1568  st->codec->sample_rate = 8000;
1569  // FIXME: Why is the following needed for some files?
1570  sc->samples_per_frame = 160;
1571  if (!sc->bytes_per_frame)
1572  sc->bytes_per_frame = 35;
1573  break;
1574  case AV_CODEC_ID_AMR_NB:
1575  st->codec->channels = 1;
1576  /* force sample rate for amr, stsd in 3gp does not store sample rate */
1577  st->codec->sample_rate = 8000;
1578  break;
1579  case AV_CODEC_ID_AMR_WB:
1580  st->codec->channels = 1;
1581  st->codec->sample_rate = 16000;
1582  break;
1583  case AV_CODEC_ID_MP2:
1584  case AV_CODEC_ID_MP3:
1585  /* force type after stsd for m1a hdlr */
1586  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1587  st->need_parsing = AVSTREAM_PARSE_FULL;
1588  break;
1589  case AV_CODEC_ID_GSM:
1590  case AV_CODEC_ID_ADPCM_MS:
1591  case AV_CODEC_ID_ADPCM_IMA_WAV:
1592  case AV_CODEC_ID_ILBC:
1593  case AV_CODEC_ID_MACE3:
1594  case AV_CODEC_ID_MACE6:
1595  case AV_CODEC_ID_QDM2:
1596  st->codec->block_align = sc->bytes_per_frame;
1597  break;
1598  case AV_CODEC_ID_ALAC:
1599  if (st->codec->extradata_size == 36) {
1600  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1601  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1602  }
1603  break;
1604  case AV_CODEC_ID_AC3:
1605  case AV_CODEC_ID_MPEG1VIDEO:
1606  case AV_CODEC_ID_VC1:
1607  st->need_parsing = AVSTREAM_PARSE_FULL;
1608  break;
1609  default:
1610  break;
1611  }
1612  return 0;
1613 }
1614 
1615 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
1616  int codec_tag, int format,
1617  int size)
1618 {
1619  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1620 
1621  if (codec_tag &&
1622  (codec_tag != format &&
1623  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1624  : codec_tag != MKTAG('j','p','e','g')))) {
1625  /* Multiple fourcc, we skip JPEG. This is not correct, we should
1626  * export it as a separate AVStream but this needs a few changes
1627  * in the MOV demuxer, patch welcome. */
1628 
1629  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1630  avio_skip(pb, size);
1631  return 1;
1632  }
1633  if ( codec_tag == AV_RL32("avc1") ||
1634  codec_tag == AV_RL32("hvc1") ||
1635  codec_tag == AV_RL32("hev1")
1636  )
1637  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
1638 
1639  return 0;
1640 }
1641 
1642 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1643 {
1644  AVStream *st;
1645  MOVStreamContext *sc;
1646  int pseudo_stream_id;
1647 
1648  if (c->fc->nb_streams < 1)
1649  return 0;
1650  st = c->fc->streams[c->fc->nb_streams-1];
1651  sc = st->priv_data;
1652 
1653  for (pseudo_stream_id = 0;
1654  pseudo_stream_id < entries && !pb->eof_reached;
1655  pseudo_stream_id++) {
1656  //Parsing Sample description table
1657  enum AVCodecID id;
1658  int ret, dref_id = 1;
1659  MOVAtom a = { AV_RL32("stsd") };
1660  int64_t start_pos = avio_tell(pb);
1661  int64_t size = avio_rb32(pb); /* size */
1662  uint32_t format = avio_rl32(pb); /* data format */
1663 
1664  if (size >= 16) {
1665  avio_rb32(pb); /* reserved */
1666  avio_rb16(pb); /* reserved */
1667  dref_id = avio_rb16(pb);
1668  }else if (size <= 7){
1669  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1670  return AVERROR_INVALIDDATA;
1671  }
1672 
1673  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1674  size - (avio_tell(pb) - start_pos)))
1675  continue;
1676 
1677  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1678  sc->dref_id= dref_id;
1679 
1680  id = mov_codec_id(st, format);
1681 
1682  av_dlog(c->fc, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1683  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1684  (format >> 24) & 0xff, st->codec->codec_type);
1685 
1686  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1687  st->codec->codec_id = id;
1688  mov_parse_stsd_video(c, pb, st, sc);
1689  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1690  st->codec->codec_id = id;
1691  mov_parse_stsd_audio(c, pb, st, sc);
1692  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1693  st->codec->codec_id = id;
1694  mov_parse_stsd_subtitle(c, pb, st, sc,
1695  size - (avio_tell(pb) - start_pos));
1696  } else {
1697  ret = mov_parse_stsd_data(c, pb, st, sc,
1698  size - (avio_tell(pb) - start_pos));
1699  if (ret < 0)
1700  return ret;
1701  }
1702  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1703  a.size = size - (avio_tell(pb) - start_pos);
1704  if (a.size > 8) {
1705  if ((ret = mov_read_default(c, pb, a)) < 0)
1706  return ret;
1707  } else if (a.size > 0)
1708  avio_skip(pb, a.size);
1709  }
1710 
1711  if (pb->eof_reached)
1712  return AVERROR_EOF;
1713 
1714  return mov_finalize_stsd_codec(c, pb, st, sc);
1715 }
1716 
1717 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1718 {
1719  int entries;
1720 
1721  avio_r8(pb); /* version */
1722  avio_rb24(pb); /* flags */
1723  entries = avio_rb32(pb);
1724 
1725  return ff_mov_read_stsd_entries(c, pb, entries);
1726 }
1727 
1728 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1729 {
1730  AVStream *st;
1731  MOVStreamContext *sc;
1732  unsigned int i, entries;
1733 
1734  if (c->fc->nb_streams < 1)
1735  return 0;
1736  st = c->fc->streams[c->fc->nb_streams-1];
1737  sc = st->priv_data;
1738 
1739  avio_r8(pb); /* version */
1740  avio_rb24(pb); /* flags */
1741 
1742  entries = avio_rb32(pb);
1743 
1744  av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1745 
1746  if (!entries)
1747  return 0;
1748  if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1749  return AVERROR_INVALIDDATA;
1750  sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1751  if (!sc->stsc_data)
1752  return AVERROR(ENOMEM);
1753 
1754  for (i = 0; i < entries && !pb->eof_reached; i++) {
1755  sc->stsc_data[i].first = avio_rb32(pb);
1756  sc->stsc_data[i].count = avio_rb32(pb);
1757  sc->stsc_data[i].id = avio_rb32(pb);
1758  }
1759 
1760  sc->stsc_count = i;
1761 
1762  if (pb->eof_reached)
1763  return AVERROR_EOF;
1764 
1765  return 0;
1766 }
1767 
1768 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1769 {
1770  AVStream *st;
1771  MOVStreamContext *sc;
1772  unsigned i, entries;
1773 
1774  if (c->fc->nb_streams < 1)
1775  return 0;
1776  st = c->fc->streams[c->fc->nb_streams-1];
1777  sc = st->priv_data;
1778 
1779  avio_rb32(pb); // version + flags
1780 
1781  entries = avio_rb32(pb);
1782  if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1783  return AVERROR_INVALIDDATA;
1784  sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1785  if (!sc->stps_data)
1786  return AVERROR(ENOMEM);
1787 
1788  for (i = 0; i < entries && !pb->eof_reached; i++) {
1789  sc->stps_data[i] = avio_rb32(pb);
1790  //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1791  }
1792 
1793  sc->stps_count = i;
1794 
1795  if (pb->eof_reached)
1796  return AVERROR_EOF;
1797 
1798  return 0;
1799 }
1800 
1801 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1802 {
1803  AVStream *st;
1804  MOVStreamContext *sc;
1805  unsigned int i, entries;
1806 
1807  if (c->fc->nb_streams < 1)
1808  return 0;
1809  st = c->fc->streams[c->fc->nb_streams-1];
1810  sc = st->priv_data;
1811 
1812  avio_r8(pb); /* version */
1813  avio_rb24(pb); /* flags */
1814 
1815  entries = avio_rb32(pb);
1816 
1817  av_dlog(c->fc, "keyframe_count = %d\n", entries);
1818 
1819  if (!entries)
1820  {
1821  sc->keyframe_absent = 1;
1822  if (!st->need_parsing && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1823  st->need_parsing = AVSTREAM_PARSE_HEADERS;
1824  return 0;
1825  }
1826  if (entries >= UINT_MAX / sizeof(int))
1827  return AVERROR_INVALIDDATA;
1828  sc->keyframes = av_malloc(entries * sizeof(int));
1829  if (!sc->keyframes)
1830  return AVERROR(ENOMEM);
1831 
1832  for (i = 0; i < entries && !pb->eof_reached; i++) {
1833  sc->keyframes[i] = avio_rb32(pb);
1834  //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1835  }
1836 
1837  sc->keyframe_count = i;
1838 
1839  if (pb->eof_reached)
1840  return AVERROR_EOF;
1841 
1842  return 0;
1843 }
1844 
1845 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1846 {
1847  AVStream *st;
1848  MOVStreamContext *sc;
1849  unsigned int i, entries, sample_size, field_size, num_bytes;
1850  GetBitContext gb;
1851  unsigned char* buf;
1852 
1853  if (c->fc->nb_streams < 1)
1854  return 0;
1855  st = c->fc->streams[c->fc->nb_streams-1];
1856  sc = st->priv_data;
1857 
1858  avio_r8(pb); /* version */
1859  avio_rb24(pb); /* flags */
1860 
1861  if (atom.type == MKTAG('s','t','s','z')) {
1862  sample_size = avio_rb32(pb);
1863  if (!sc->sample_size) /* do not overwrite value computed in stsd */
1864  sc->sample_size = sample_size;
1865  sc->stsz_sample_size = sample_size;
1866  field_size = 32;
1867  } else {
1868  sample_size = 0;
1869  avio_rb24(pb); /* reserved */
1870  field_size = avio_r8(pb);
1871  }
1872  entries = avio_rb32(pb);
1873 
1874  av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1875 
1876  sc->sample_count = entries;
1877  if (sample_size)
1878  return 0;
1879 
1880  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1881  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1882  return AVERROR_INVALIDDATA;
1883  }
1884 
1885  if (!entries)
1886  return 0;
1887  if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1888  return AVERROR_INVALIDDATA;
1889  sc->sample_sizes = av_malloc(entries * sizeof(int));
1890  if (!sc->sample_sizes)
1891  return AVERROR(ENOMEM);
1892 
1893  num_bytes = (entries*field_size+4)>>3;
1894 
1895  buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1896  if (!buf) {
1897  av_freep(&sc->sample_sizes);
1898  return AVERROR(ENOMEM);
1899  }
1900 
1901  if (avio_read(pb, buf, num_bytes) < num_bytes) {
1902  av_freep(&sc->sample_sizes);
1903  av_free(buf);
1904  return AVERROR_INVALIDDATA;
1905  }
1906 
1907  init_get_bits(&gb, buf, 8*num_bytes);
1908 
1909  for (i = 0; i < entries && !pb->eof_reached; i++) {
1910  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1911  sc->data_size += sc->sample_sizes[i];
1912  }
1913 
1914  sc->sample_count = i;
1915 
1916  if (pb->eof_reached)
1917  return AVERROR_EOF;
1918 
1919  av_free(buf);
1920  return 0;
1921 }
1922 
1923 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1924 {
1925  AVStream *st;
1926  MOVStreamContext *sc;
1927  unsigned int i, entries;
1928  int64_t duration=0;
1929  int64_t total_sample_count=0;
1930 
1931  if (c->fc->nb_streams < 1)
1932  return 0;
1933  st = c->fc->streams[c->fc->nb_streams-1];
1934  sc = st->priv_data;
1935 
1936  avio_r8(pb); /* version */
1937  avio_rb24(pb); /* flags */
1938  entries = avio_rb32(pb);
1939 
1940  av_dlog(c->fc, "track[%i].stts.entries = %i\n",
1941  c->fc->nb_streams-1, entries);
1942 
1943  if (entries >= UINT_MAX / sizeof(*sc->stts_data))
1944  return -1;
1945 
1946  av_free(sc->stts_data);
1947  sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1948  if (!sc->stts_data)
1949  return AVERROR(ENOMEM);
1950 
1951  for (i = 0; i < entries && !pb->eof_reached; i++) {
1952  int sample_duration;
1953  int sample_count;
1954 
1955  sample_count=avio_rb32(pb);
1956  sample_duration = avio_rb32(pb);
1957 
1958  /* sample_duration < 0 is invalid based on the spec */
1959  if (sample_duration < 0) {
1960  av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta %d in STTS, at %d st:%d\n",
1961  sample_duration, i, c->fc->nb_streams-1);
1962  sample_duration = 1;
1963  }
1964  if (sample_count < 0) {
1965  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
1966  return AVERROR_INVALIDDATA;
1967  }
1968  sc->stts_data[i].count= sample_count;
1969  sc->stts_data[i].duration= sample_duration;
1970 
1971  av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
1972  sample_count, sample_duration);
1973 
1974  if ( i+1 == entries
1975  && i
1976  && sample_count == 1
1977  && total_sample_count > 100
1978  && sample_duration/10 > duration / total_sample_count)
1979  sample_duration = duration / total_sample_count;
1980  duration+=(int64_t)sample_duration*sample_count;
1981  total_sample_count+=sample_count;
1982  }
1983 
1984  sc->stts_count = i;
1985 
1986  sc->duration_for_fps += duration;
1987  sc->nb_frames_for_fps += total_sample_count;
1988 
1989  if (pb->eof_reached)
1990  return AVERROR_EOF;
1991 
1992  st->nb_frames= total_sample_count;
1993  if (duration)
1994  st->duration= duration;
1995  sc->track_end = duration;
1996  return 0;
1997 }
1998 
1999 static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
2000 {
2001  if (duration < 0) {
2002  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2003  }
2004 }
2005 
2006 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2007 {
2008  AVStream *st;
2009  MOVStreamContext *sc;
2010  unsigned int i, entries;
2011 
2012  if (c->fc->nb_streams < 1)
2013  return 0;
2014  st = c->fc->streams[c->fc->nb_streams-1];
2015  sc = st->priv_data;
2016 
2017  avio_r8(pb); /* version */
2018  avio_rb24(pb); /* flags */
2019  entries = avio_rb32(pb);
2020 
2021  av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2022 
2023  if (!entries)
2024  return 0;
2025  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2026  return AVERROR_INVALIDDATA;
2027  sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
2028  if (!sc->ctts_data)
2029  return AVERROR(ENOMEM);
2030 
2031  for (i = 0; i < entries && !pb->eof_reached; i++) {
2032  int count =avio_rb32(pb);
2033  int duration =avio_rb32(pb);
2034 
2035  sc->ctts_data[i].count = count;
2036  sc->ctts_data[i].duration= duration;
2037 
2038  av_dlog(c->fc, "count=%d, duration=%d\n",
2039  count, duration);
2040 
2041  if (FFABS(duration) > (1<<28) && i+2<entries) {
2042  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2043  av_freep(&sc->ctts_data);
2044  sc->ctts_count = 0;
2045  return 0;
2046  }
2047 
2048  if (i+2<entries)
2049  mov_update_dts_shift(sc, duration);
2050  }
2051 
2052  sc->ctts_count = i;
2053 
2054  if (pb->eof_reached)
2055  return AVERROR_EOF;
2056 
2057  av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
2058 
2059  return 0;
2060 }
2061 
2062 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2063 {
2064  AVStream *st;
2065  MOVStreamContext *sc;
2066  unsigned int i, entries;
2067  uint8_t version;
2068  uint32_t grouping_type;
2069 
2070  if (c->fc->nb_streams < 1)
2071  return 0;
2072  st = c->fc->streams[c->fc->nb_streams-1];
2073  sc = st->priv_data;
2074 
2075  version = avio_r8(pb); /* version */
2076  avio_rb24(pb); /* flags */
2077  grouping_type = avio_rl32(pb);
2078  if (grouping_type != MKTAG( 'r','a','p',' '))
2079  return 0; /* only support 'rap ' grouping */
2080  if (version == 1)
2081  avio_rb32(pb); /* grouping_type_parameter */
2082 
2083  entries = avio_rb32(pb);
2084  if (!entries)
2085  return 0;
2086  if (entries >= UINT_MAX / sizeof(*sc->rap_group))
2087  return AVERROR_INVALIDDATA;
2088  sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
2089  if (!sc->rap_group)
2090  return AVERROR(ENOMEM);
2091 
2092  for (i = 0; i < entries && !pb->eof_reached; i++) {
2093  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2094  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2095  }
2096 
2097  sc->rap_group_count = i;
2098 
2099  return pb->eof_reached ? AVERROR_EOF : 0;
2100 }
2101 
2102 static void mov_build_index(MOVContext *mov, AVStream *st)
2103 {
2104  MOVStreamContext *sc = st->priv_data;
2105  int64_t current_offset;
2106  int64_t current_dts = 0;
2107  unsigned int stts_index = 0;
2108  unsigned int stsc_index = 0;
2109  unsigned int stss_index = 0;
2110  unsigned int stps_index = 0;
2111  unsigned int i, j;
2112  uint64_t stream_size = 0;
2113 
2114  /* adjust first dts according to edit list */
2115  if ((sc->empty_duration || sc->start_time) && mov->time_scale > 0) {
2116  if (sc->empty_duration)
2117  sc->empty_duration = av_rescale(sc->empty_duration, sc->time_scale, mov->time_scale);
2118  sc->time_offset = sc->start_time - sc->empty_duration;
2119  current_dts = -sc->time_offset;
2120  if (sc->ctts_count>0 && sc->stts_count>0 &&
2121  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2122  /* more than 16 frames delay, dts are likely wrong
2123  this happens with files created by iMovie */
2124  sc->wrong_dts = 1;
2125  st->codec->has_b_frames = 1;
2126  }
2127  }
2128 
2129  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2130  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2131  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2132  unsigned int current_sample = 0;
2133  unsigned int stts_sample = 0;
2134  unsigned int sample_size;
2135  unsigned int distance = 0;
2136  unsigned int rap_group_index = 0;
2137  unsigned int rap_group_sample = 0;
2138  int rap_group_present = sc->rap_group_count && sc->rap_group;
2139  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2140 
2141  current_dts -= sc->dts_shift;
2142 
2143  if (!sc->sample_count || st->nb_index_entries)
2144  return;
2145  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2146  return;
2147  if (av_reallocp_array(&st->index_entries,
2148  st->nb_index_entries + sc->sample_count,
2149  sizeof(*st->index_entries)) < 0) {
2150  st->nb_index_entries = 0;
2151  return;
2152  }
2153  st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
2154 
2155  for (i = 0; i < sc->chunk_count; i++) {
2156  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2157  current_offset = sc->chunk_offsets[i];
2158  while (stsc_index + 1 < sc->stsc_count &&
2159  i + 1 == sc->stsc_data[stsc_index + 1].first)
2160  stsc_index++;
2161 
2162  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2163  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2164  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2165  sc->stsz_sample_size = sc->sample_size;
2166  }
2167  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2168  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2169  sc->stsz_sample_size = sc->sample_size;
2170  }
2171 
2172  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2173  int keyframe = 0;
2174  if (current_sample >= sc->sample_count) {
2175  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2176  return;
2177  }
2178 
2179  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2180  keyframe = 1;
2181  if (stss_index + 1 < sc->keyframe_count)
2182  stss_index++;
2183  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2184  keyframe = 1;
2185  if (stps_index + 1 < sc->stps_count)
2186  stps_index++;
2187  }
2188  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2189  if (sc->rap_group[rap_group_index].index > 0)
2190  keyframe = 1;
2191  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2192  rap_group_sample = 0;
2193  rap_group_index++;
2194  }
2195  }
2196  if (sc->keyframe_absent
2197  && !sc->stps_count
2198  && !rap_group_present
2199  && (st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2200  keyframe = 1;
2201  if (keyframe)
2202  distance = 0;
2203  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2204  if (sc->pseudo_stream_id == -1 ||
2205  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2206  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2207  e->pos = current_offset;
2208  e->timestamp = current_dts;
2209  e->size = sample_size;
2210  e->min_distance = distance;
2211  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2212  av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2213  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2214  current_offset, current_dts, sample_size, distance, keyframe);
2215  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2216  ff_rfps_add_frame(mov->fc, st, current_dts);
2217  }
2218 
2219  current_offset += sample_size;
2220  stream_size += sample_size;
2221  current_dts += sc->stts_data[stts_index].duration;
2222  distance++;
2223  stts_sample++;
2224  current_sample++;
2225  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2226  stts_sample = 0;
2227  stts_index++;
2228  }
2229  }
2230  }
2231  if (st->duration > 0)
2232  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2233  } else {
2234  unsigned chunk_samples, total = 0;
2235 
2236  // compute total chunk count
2237  for (i = 0; i < sc->stsc_count; i++) {
2238  unsigned count, chunk_count;
2239 
2240  chunk_samples = sc->stsc_data[i].count;
2241  if (i != sc->stsc_count - 1 &&
2242  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2243  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2244  return;
2245  }
2246 
2247  if (sc->samples_per_frame >= 160) { // gsm
2248  count = chunk_samples / sc->samples_per_frame;
2249  } else if (sc->samples_per_frame > 1) {
2250  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2251  count = (chunk_samples+samples-1) / samples;
2252  } else {
2253  count = (chunk_samples+1023) / 1024;
2254  }
2255 
2256  if (i < sc->stsc_count - 1)
2257  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2258  else
2259  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2260  total += chunk_count * count;
2261  }
2262 
2263  av_dlog(mov->fc, "chunk count %d\n", total);
2264  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2265  return;
2266  if (av_reallocp_array(&st->index_entries,
2267  st->nb_index_entries + total,
2268  sizeof(*st->index_entries)) < 0) {
2269  st->nb_index_entries = 0;
2270  return;
2271  }
2272  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2273 
2274  // populate index
2275  for (i = 0; i < sc->chunk_count; i++) {
2276  current_offset = sc->chunk_offsets[i];
2277  if (stsc_index + 1 < sc->stsc_count &&
2278  i + 1 == sc->stsc_data[stsc_index + 1].first)
2279  stsc_index++;
2280  chunk_samples = sc->stsc_data[stsc_index].count;
2281 
2282  while (chunk_samples > 0) {
2283  AVIndexEntry *e;
2284  unsigned size, samples;
2285 
2286  if (sc->samples_per_frame >= 160) { // gsm
2287  samples = sc->samples_per_frame;
2288  size = sc->bytes_per_frame;
2289  } else {
2290  if (sc->samples_per_frame > 1) {
2291  samples = FFMIN((1024 / sc->samples_per_frame)*
2292  sc->samples_per_frame, chunk_samples);
2293  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2294  } else {
2295  samples = FFMIN(1024, chunk_samples);
2296  size = samples * sc->sample_size;
2297  }
2298  }
2299 
2300  if (st->nb_index_entries >= total) {
2301  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2302  return;
2303  }
2304  e = &st->index_entries[st->nb_index_entries++];
2305  e->pos = current_offset;
2306  e->timestamp = current_dts;
2307  e->size = size;
2308  e->min_distance = 0;
2309  e->flags = AVINDEX_KEYFRAME;
2310  av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2311  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2312  size, samples);
2313 
2314  current_offset += size;
2315  current_dts += samples;
2316  chunk_samples -= samples;
2317  }
2318  }
2319  }
2320 }
2321 
2322 static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
2323  AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
2324 {
2325  /* try relative path, we do not try the absolute because it can leak information about our
2326  system to an attacker */
2327  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2328  char filename[1024];
2329  const char *src_path;
2330  int i, l;
2331 
2332  /* find a source dir */
2333  src_path = strrchr(src, '/');
2334  if (src_path)
2335  src_path++;
2336  else
2337  src_path = src;
2338 
2339  /* find a next level down to target */
2340  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2341  if (ref->path[l] == '/') {
2342  if (i == ref->nlvl_to - 1)
2343  break;
2344  else
2345  i++;
2346  }
2347 
2348  /* compose filename if next level down to target was found */
2349  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2350  memcpy(filename, src, src_path - src);
2351  filename[src_path - src] = 0;
2352 
2353  for (i = 1; i < ref->nlvl_from; i++)
2354  av_strlcat(filename, "../", 1024);
2355 
2356  av_strlcat(filename, ref->path + l + 1, 1024);
2357 
2358  if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2359  return 0;
2360  }
2361  } else if (use_absolute_path) {
2362  av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
2363  "this is a possible security issue\n");
2364  if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2365  return 0;
2366  }
2367 
2368  return AVERROR(ENOENT);
2369 }
2370 
2371 static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
2372 {
2373  if (sc->time_scale <= 0) {
2374  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2375  sc->time_scale = c->time_scale;
2376  if (sc->time_scale <= 0)
2377  sc->time_scale = 1;
2378  }
2379 }
2380 
2381 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2382 {
2383  AVStream *st;
2384  MOVStreamContext *sc;
2385  int ret;
2386 
2387  st = avformat_new_stream(c->fc, NULL);
2388  if (!st) return AVERROR(ENOMEM);
2389  st->id = c->fc->nb_streams;
2390  sc = av_mallocz(sizeof(MOVStreamContext));
2391  if (!sc) return AVERROR(ENOMEM);
2392 
2393  st->priv_data = sc;
2394  st->codec->codec_type = AVMEDIA_TYPE_DATA;
2395  sc->ffindex = st->index;
2396 
2397  if ((ret = mov_read_default(c, pb, atom)) < 0)
2398  return ret;
2399 
2400  /* sanity checks */
2401  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2402  (!sc->sample_size && !sc->sample_count))) {
2403  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2404  st->index);
2405  return 0;
2406  }
2407 
2408  fix_timescale(c, sc);
2409 
2410  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2411 
2412  mov_build_index(c, st);
2413 
2414  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2415  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2416  if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
2417  c->use_absolute_path, c->fc) < 0)
2418  av_log(c->fc, AV_LOG_ERROR,
2419  "stream %d, error opening alias: path='%s', dir='%s', "
2420  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2421  st->index, dref->path, dref->dir, dref->filename,
2422  dref->volume, dref->nlvl_from, dref->nlvl_to);
2423  } else {
2424  sc->pb = c->fc->pb;
2425  sc->pb_is_copied = 1;
2426  }
2427 
2428  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2429  if (!st->sample_aspect_ratio.num &&
2430  (st->codec->width != sc->width || st->codec->height != sc->height)) {
2431  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2432  ((double)st->codec->width * sc->height), INT_MAX);
2433  }
2434 
2435 #if FF_API_R_FRAME_RATE
2436  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2437  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
2438  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2439 #endif
2440  }
2441 
2442  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2443  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2444  TAG_IS_AVCI(st->codec->codec_tag)) {
2445  ret = ff_generate_avci_extradata(st);
2446  if (ret < 0)
2447  return ret;
2448  }
2449 
2450  switch (st->codec->codec_id) {
2451 #if CONFIG_H261_DECODER
2452  case AV_CODEC_ID_H261:
2453 #endif
2454 #if CONFIG_H263_DECODER
2455  case AV_CODEC_ID_H263:
2456 #endif
2457 #if CONFIG_MPEG4_DECODER
2458  case AV_CODEC_ID_MPEG4:
2459 #endif
2460  st->codec->width = 0; /* let decoder init width/height */
2461  st->codec->height= 0;
2462  break;
2463  }
2464 
2465  /* Do not need those anymore. */
2466  av_freep(&sc->chunk_offsets);
2467  av_freep(&sc->stsc_data);
2468  av_freep(&sc->sample_sizes);
2469  av_freep(&sc->keyframes);
2470  av_freep(&sc->stts_data);
2471  av_freep(&sc->stps_data);
2472  av_freep(&sc->rap_group);
2473 
2474  return 0;
2475 }
2476 
2477 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2478 {
2479  int ret;
2480  c->itunes_metadata = 1;
2481  ret = mov_read_default(c, pb, atom);
2482  c->itunes_metadata = 0;
2483  return ret;
2484 }
2485 
2486 static int mov_read_custom_2plus(MOVContext *c, AVIOContext *pb, int size)
2487 {
2488  int64_t end = avio_tell(pb) + size;
2489  uint8_t *key = NULL, *val = NULL;
2490  int i;
2491  AVStream *st;
2492  MOVStreamContext *sc;
2493 
2494  if (c->fc->nb_streams < 1)
2495  return 0;
2496  st = c->fc->streams[c->fc->nb_streams-1];
2497  sc = st->priv_data;
2498 
2499  for (i = 0; i < 2; i++) {
2500  uint8_t **p;
2501  uint32_t len, tag;
2502 
2503  if (end - avio_tell(pb) <= 12)
2504  break;
2505 
2506  len = avio_rb32(pb);
2507  tag = avio_rl32(pb);
2508  avio_skip(pb, 4); // flags
2509 
2510  if (len < 12 || len - 12 > end - avio_tell(pb))
2511  break;
2512  len -= 12;
2513 
2514  if (tag == MKTAG('n', 'a', 'm', 'e'))
2515  p = &key;
2516  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
2517  avio_skip(pb, 4);
2518  len -= 4;
2519  p = &val;
2520  } else
2521  break;
2522 
2523  *p = av_malloc(len + 1);
2524  if (!*p)
2525  break;
2526  avio_read(pb, *p, len);
2527  (*p)[len] = 0;
2528  }
2529 
2530  if (key && val) {
2531  if (strcmp(key, "iTunSMPB") == 0) {
2532  int priming, remainder, samples;
2533  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
2534  if(priming>0 && priming<16384)
2535  sc->start_pad = priming;
2536  }
2537  } else if (strcmp(key, "cdec") == 0) {
2538  } else {
2539  av_dict_set(&c->fc->metadata, key, val,
2540  AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
2541  key = val = NULL;
2542  }
2543  }
2544 
2545  avio_seek(pb, end, SEEK_SET);
2546  av_freep(&key);
2547  av_freep(&val);
2548  return 0;
2549 }
2550 
2551 static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2552 {
2553  int64_t end = avio_tell(pb) + atom.size;
2554  uint32_t tag, len;
2555 
2556  if (atom.size < 8)
2557  goto fail;
2558 
2559  len = avio_rb32(pb);
2560  tag = avio_rl32(pb);
2561 
2562  if (len > atom.size)
2563  goto fail;
2564 
2565  if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
2566  uint8_t domain[128];
2567  int domain_len;
2568 
2569  avio_skip(pb, 4); // flags
2570  len -= 12;
2571 
2572  domain_len = avio_get_str(pb, len, domain, sizeof(domain));
2573  avio_skip(pb, len - domain_len);
2574  return mov_read_custom_2plus(c, pb, end - avio_tell(pb));
2575  }
2576 
2577 fail:
2578  av_log(c->fc, AV_LOG_VERBOSE,
2579  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
2580  return 0;
2581 }
2582 
2583 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2584 {
2585  while (atom.size > 8) {
2586  uint32_t tag = avio_rl32(pb);
2587  atom.size -= 4;
2588  if (tag == MKTAG('h','d','l','r')) {
2589  avio_seek(pb, -8, SEEK_CUR);
2590  atom.size += 8;
2591  return mov_read_default(c, pb, atom);
2592  }
2593  }
2594  return 0;
2595 }
2596 
2597 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2598 {
2599  int i;
2600  int width;
2601  int height;
2602  int64_t disp_transform[2];
2603  int display_matrix[3][3];
2604  AVStream *st;
2605  MOVStreamContext *sc;
2606  int version;
2607  int flags;
2608 
2609  if (c->fc->nb_streams < 1)
2610  return 0;
2611  st = c->fc->streams[c->fc->nb_streams-1];
2612  sc = st->priv_data;
2613 
2614  version = avio_r8(pb);
2615  flags = avio_rb24(pb);
2616  st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
2617 
2618  if (version == 1) {
2619  avio_rb64(pb);
2620  avio_rb64(pb);
2621  } else {
2622  avio_rb32(pb); /* creation time */
2623  avio_rb32(pb); /* modification time */
2624  }
2625  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2626  avio_rb32(pb); /* reserved */
2627 
2628  /* highlevel (considering edits) duration in movie timebase */
2629  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2630  avio_rb32(pb); /* reserved */
2631  avio_rb32(pb); /* reserved */
2632 
2633  avio_rb16(pb); /* layer */
2634  avio_rb16(pb); /* alternate group */
2635  avio_rb16(pb); /* volume */
2636  avio_rb16(pb); /* reserved */
2637 
2638  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2639  // they're kept in fixed point format through all calculations
2640  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
2641  // side data, but the scale factor is not needed to calculate aspect ratio
2642  for (i = 0; i < 3; i++) {
2643  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2644  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2645  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
2646  }
2647 
2648  width = avio_rb32(pb); // 16.16 fixed point track width
2649  height = avio_rb32(pb); // 16.16 fixed point track height
2650  sc->width = width >> 16;
2651  sc->height = height >> 16;
2652 
2653  // save the matrix and add rotate metadata when it is not the default
2654  // identity
2655  if (display_matrix[0][0] != (1 << 16) ||
2656  display_matrix[1][1] != (1 << 16) ||
2657  display_matrix[2][2] != (1 << 30) ||
2658  display_matrix[0][1] || display_matrix[0][2] ||
2659  display_matrix[1][0] || display_matrix[1][2] ||
2660  display_matrix[2][0] || display_matrix[2][1]) {
2661  int i, j;
2662  double rotate;
2663 
2664  av_freep(&sc->display_matrix);
2665  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
2666  if (!sc->display_matrix)
2667  return AVERROR(ENOMEM);
2668 
2669  for (i = 0; i < 3; i++)
2670  for (j = 0; j < 3; j++)
2671  sc->display_matrix[i * 3 + j] = display_matrix[j][i];
2672 
2673  rotate = av_display_rotation_get(sc->display_matrix);
2674  if (!isnan(rotate)) {
2675  char rotate_buf[64];
2676  rotate = -rotate;
2677  if (rotate < 0) // for backward compatibility
2678  rotate += 360;
2679  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
2680  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
2681  }
2682  }
2683 
2684  // transform the display width/height according to the matrix
2685  // skip this if the display matrix is the default identity matrix
2686  // or if it is rotating the picture, ex iPhone 3GS
2687  // to keep the same scale, use [width height 1<<16]
2688  if (width && height &&
2689  ((display_matrix[0][0] != 65536 ||
2690  display_matrix[1][1] != 65536) &&
2691  !display_matrix[0][1] &&
2692  !display_matrix[1][0] &&
2693  !display_matrix[2][0] && !display_matrix[2][1])) {
2694  for (i = 0; i < 2; i++)
2695  disp_transform[i] =
2696  (int64_t) width * display_matrix[0][i] +
2697  (int64_t) height * display_matrix[1][i] +
2698  ((int64_t) display_matrix[2][i] << 16);
2699 
2700  //sample aspect ratio is new width/height divided by old width/height
2701  st->sample_aspect_ratio = av_d2q(
2702  ((double) disp_transform[0] * height) /
2703  ((double) disp_transform[1] * width), INT_MAX);
2704  }
2705  return 0;
2706 }
2707 
2708 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2709 {
2710  MOVFragment *frag = &c->fragment;
2711  MOVTrackExt *trex = NULL;
2712  int flags, track_id, i;
2713 
2714  avio_r8(pb); /* version */
2715  flags = avio_rb24(pb);
2716 
2717  track_id = avio_rb32(pb);
2718  if (!track_id)
2719  return AVERROR_INVALIDDATA;
2720  frag->track_id = track_id;
2721  for (i = 0; i < c->trex_count; i++)
2722  if (c->trex_data[i].track_id == frag->track_id) {
2723  trex = &c->trex_data[i];
2724  break;
2725  }
2726  if (!trex) {
2727  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2728  return AVERROR_INVALIDDATA;
2729  }
2730 
2731  frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
2732  avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
2733  frag->moof_offset : frag->implicit_offset;
2734  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2735 
2736  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2737  avio_rb32(pb) : trex->duration;
2738  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2739  avio_rb32(pb) : trex->size;
2740  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2741  avio_rb32(pb) : trex->flags;
2742  av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2743  return 0;
2744 }
2745 
2746 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2747 {
2748  c->chapter_track = avio_rb32(pb);
2749  return 0;
2750 }
2751 
2752 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2753 {
2754  MOVTrackExt *trex;
2755  int err;
2756 
2757  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2758  return AVERROR_INVALIDDATA;
2759  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2760  sizeof(*c->trex_data))) < 0) {
2761  c->trex_count = 0;
2762  return err;
2763  }
2764 
2765  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
2766 
2767  trex = &c->trex_data[c->trex_count++];
2768  avio_r8(pb); /* version */
2769  avio_rb24(pb); /* flags */
2770  trex->track_id = avio_rb32(pb);
2771  trex->stsd_id = avio_rb32(pb);
2772  trex->duration = avio_rb32(pb);
2773  trex->size = avio_rb32(pb);
2774  trex->flags = avio_rb32(pb);
2775  return 0;
2776 }
2777 
2778 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2779 {
2780  MOVFragment *frag = &c->fragment;
2781  AVStream *st = NULL;
2782  MOVStreamContext *sc;
2783  MOVStts *ctts_data;
2784  uint64_t offset;
2785  int64_t dts;
2786  int data_offset = 0;
2787  unsigned entries, first_sample_flags = frag->flags;
2788  int flags, distance, i, found_keyframe = 0, err;
2789 
2790  for (i = 0; i < c->fc->nb_streams; i++) {
2791  if (c->fc->streams[i]->id == frag->track_id) {
2792  st = c->fc->streams[i];
2793  break;
2794  }
2795  }
2796  if (!st) {
2797  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2798  return AVERROR_INVALIDDATA;
2799  }
2800  sc = st->priv_data;
2801  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
2802  return 0;
2803  avio_r8(pb); /* version */
2804  flags = avio_rb24(pb);
2805  entries = avio_rb32(pb);
2806  av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2807 
2808  /* Always assume the presence of composition time offsets.
2809  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2810  * 1) in the initial movie, there are no samples.
2811  * 2) in the first movie fragment, there is only one sample without composition time offset.
2812  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2813  if (!sc->ctts_count && sc->sample_count)
2814  {
2815  /* Complement ctts table if moov atom doesn't have ctts atom. */
2816  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
2817  if (!ctts_data)
2818  return AVERROR(ENOMEM);
2819  sc->ctts_data = ctts_data;
2820  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
2821  sc->ctts_data[sc->ctts_count].duration = 0;
2822  sc->ctts_count++;
2823  }
2824  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2825  return AVERROR_INVALIDDATA;
2826  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
2827  sizeof(*sc->ctts_data))) < 0) {
2828  sc->ctts_count = 0;
2829  return err;
2830  }
2831  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
2832  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
2833  dts = sc->track_end - sc->time_offset;
2834  offset = frag->base_data_offset + data_offset;
2835  distance = 0;
2836  av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2837  for (i = 0; i < entries && !pb->eof_reached; i++) {
2838  unsigned sample_size = frag->size;
2839  int sample_flags = i ? frag->flags : first_sample_flags;
2840  unsigned sample_duration = frag->duration;
2841  int keyframe = 0;
2842 
2843  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
2844  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
2845  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
2846  sc->ctts_data[sc->ctts_count].count = 1;
2847  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
2848  avio_rb32(pb) : 0;
2849  mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
2850  sc->ctts_count++;
2851  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2852  keyframe = 1;
2853  else if (!found_keyframe)
2854  keyframe = found_keyframe =
2855  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
2856  MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
2857  if (keyframe)
2858  distance = 0;
2859  av_add_index_entry(st, offset, dts, sample_size, distance,
2860  keyframe ? AVINDEX_KEYFRAME : 0);
2861  av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2862  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2863  offset, dts, sample_size, distance, keyframe);
2864  distance++;
2865  dts += sample_duration;
2866  offset += sample_size;
2867  sc->data_size += sample_size;
2868  sc->duration_for_fps += sample_duration;
2869  sc->nb_frames_for_fps ++;
2870  }
2871 
2872  if (pb->eof_reached)
2873  return AVERROR_EOF;
2874 
2875  frag->implicit_offset = offset;
2876  st->duration = sc->track_end = dts + sc->time_offset;
2877  return 0;
2878 }
2879 
2880 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2881 /* like the files created with Adobe Premiere 5.0, for samples see */
2882 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2883 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2884 {
2885  int err;
2886 
2887  if (atom.size < 8)
2888  return 0; /* continue */
2889  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2890  avio_skip(pb, atom.size - 4);
2891  return 0;
2892  }
2893  atom.type = avio_rl32(pb);
2894  atom.size -= 8;
2895  if (atom.type != MKTAG('m','d','a','t')) {
2896  avio_skip(pb, atom.size);
2897  return 0;
2898  }
2899  err = mov_read_mdat(c, pb, atom);
2900  return err;
2901 }
2902 
2903 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2904 {
2905 #if CONFIG_ZLIB
2906  AVIOContext ctx;
2907  uint8_t *cmov_data;
2908  uint8_t *moov_data; /* uncompressed data */
2909  long cmov_len, moov_len;
2910  int ret = -1;
2911 
2912  avio_rb32(pb); /* dcom atom */
2913  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2914  return AVERROR_INVALIDDATA;
2915  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2916  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
2917  return AVERROR_INVALIDDATA;
2918  }
2919  avio_rb32(pb); /* cmvd atom */
2920  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2921  return AVERROR_INVALIDDATA;
2922  moov_len = avio_rb32(pb); /* uncompressed size */
2923  cmov_len = atom.size - 6 * 4;
2924 
2925  cmov_data = av_malloc(cmov_len);
2926  if (!cmov_data)
2927  return AVERROR(ENOMEM);
2928  moov_data = av_malloc(moov_len);
2929  if (!moov_data) {
2930  av_free(cmov_data);
2931  return AVERROR(ENOMEM);
2932  }
2933  avio_read(pb, cmov_data, cmov_len);
2934  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2935  goto free_and_return;
2936  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2937  goto free_and_return;
2938  atom.type = MKTAG('m','o','o','v');
2939  atom.size = moov_len;
2940  ret = mov_read_default(c, &ctx, atom);
2941 free_and_return:
2942  av_free(moov_data);
2943  av_free(cmov_data);
2944  return ret;
2945 #else
2946  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2947  return AVERROR(ENOSYS);
2948 #endif
2949 }
2950 
2951 /* edit list atom */
2952 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2953 {
2954  MOVStreamContext *sc;
2955  int i, edit_count, version, edit_start_index = 0;
2956  int unsupported = 0;
2957 
2958  if (c->fc->nb_streams < 1 || c->ignore_editlist)
2959  return 0;
2960  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2961 
2962  version = avio_r8(pb); /* version */
2963  avio_rb24(pb); /* flags */
2964  edit_count = avio_rb32(pb); /* entries */
2965 
2966  if ((uint64_t)edit_count*12+8 > atom.size)
2967  return AVERROR_INVALIDDATA;
2968 
2969  av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2970  for (i=0; i<edit_count; i++){
2971  int64_t time;
2972  int64_t duration;
2973  int rate;
2974  if (version == 1) {
2975  duration = avio_rb64(pb);
2976  time = avio_rb64(pb);
2977  } else {
2978  duration = avio_rb32(pb); /* segment duration */
2979  time = (int32_t)avio_rb32(pb); /* media time */
2980  }
2981  rate = avio_rb32(pb);
2982  if (i == 0 && time == -1) {
2983  sc->empty_duration = duration;
2984  edit_start_index = 1;
2985  } else if (i == edit_start_index && time >= 0)
2986  sc->start_time = time;
2987  else
2988  unsupported = 1;
2989 
2990  av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
2991  duration, time, rate / 65536.0);
2992  }
2993 
2994  if (unsupported)
2995  av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2996  "a/v desync might occur, patch welcome\n");
2997 
2998  return 0;
2999 }
3000 
3001 static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3002 {
3003  MOVStreamContext *sc;
3004 
3005  if (c->fc->nb_streams < 1)
3006  return AVERROR_INVALIDDATA;
3007  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3008  sc->timecode_track = avio_rb32(pb);
3009  return 0;
3010 }
3011 
3012 static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3013 {
3014  int ret;
3015  uint8_t uuid[16];
3016  static const uint8_t uuid_isml_manifest[] = {
3017  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3018  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3019  };
3020 
3021  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3022  return AVERROR_INVALIDDATA;
3023 
3024  ret = avio_read(pb, uuid, sizeof(uuid));
3025  if (ret < 0) {
3026  return ret;
3027  } else if (ret != sizeof(uuid)) {
3028  return AVERROR_INVALIDDATA;
3029  }
3030  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3031  uint8_t *buffer, *ptr;
3032  char *endptr;
3033  size_t len = atom.size - sizeof(uuid);
3034 
3035  if (len < 4) {
3036  return AVERROR_INVALIDDATA;
3037  }
3038  ret = avio_skip(pb, 4); // zeroes
3039  len -= 4;
3040 
3041  buffer = av_mallocz(len + 1);
3042  if (!buffer) {
3043  return AVERROR(ENOMEM);
3044  }
3045  ret = avio_read(pb, buffer, len);
3046  if (ret < 0) {
3047  av_free(buffer);
3048  return ret;
3049  } else if (ret != len) {
3050  av_free(buffer);
3051  return AVERROR_INVALIDDATA;
3052  }
3053 
3054  ptr = buffer;
3055  while ((ptr = av_stristr(ptr, "systemBitrate=\"")) != NULL) {
3056  ptr += sizeof("systemBitrate=\"") - 1;
3057  c->bitrates_count++;
3058  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3059  if (!c->bitrates) {
3060  c->bitrates_count = 0;
3061  av_free(buffer);
3062  return AVERROR(ENOMEM);
3063  }
3064  errno = 0;
3065  ret = strtol(ptr, &endptr, 10);
3066  if (ret < 0 || errno || *endptr != '"') {
3067  c->bitrates[c->bitrates_count - 1] = 0;
3068  } else {
3069  c->bitrates[c->bitrates_count - 1] = ret;
3070  }
3071  }
3072 
3073  av_free(buffer);
3074  }
3075  return 0;
3076 }
3077 
3078 static const MOVParseTableEntry mov_default_parse_table[] = {
3079 { MKTAG('A','C','L','R'), mov_read_avid },
3080 { MKTAG('A','P','R','G'), mov_read_avid },
3081 { MKTAG('A','A','L','P'), mov_read_avid },
3082 { MKTAG('A','R','E','S'), mov_read_ares },
3083 { MKTAG('a','v','s','s'), mov_read_avss },
3084 { MKTAG('c','h','p','l'), mov_read_chpl },
3085 { MKTAG('c','o','6','4'), mov_read_stco },
3086 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
3087 { MKTAG('d','i','n','f'), mov_read_default },
3088 { MKTAG('d','r','e','f'), mov_read_dref },
3089 { MKTAG('e','d','t','s'), mov_read_default },
3090 { MKTAG('e','l','s','t'), mov_read_elst },
3091 { MKTAG('e','n','d','a'), mov_read_enda },
3092 { MKTAG('f','i','e','l'), mov_read_fiel },
3093 { MKTAG('f','t','y','p'), mov_read_ftyp },
3094 { MKTAG('g','l','b','l'), mov_read_glbl },
3095 { MKTAG('h','d','l','r'), mov_read_hdlr },
3096 { MKTAG('i','l','s','t'), mov_read_ilst },
3097 { MKTAG('j','p','2','h'), mov_read_jp2h },
3098 { MKTAG('m','d','a','t'), mov_read_mdat },
3099 { MKTAG('m','d','h','d'), mov_read_mdhd },
3100 { MKTAG('m','d','i','a'), mov_read_default },
3101 { MKTAG('m','e','t','a'), mov_read_meta },
3102 { MKTAG('m','i','n','f'), mov_read_default },
3103 { MKTAG('m','o','o','f'), mov_read_moof },
3104 { MKTAG('m','o','o','v'), mov_read_moov },
3105 { MKTAG('m','v','e','x'), mov_read_default },
3106 { MKTAG('m','v','h','d'), mov_read_mvhd },
3107 { MKTAG('S','M','I',' '), mov_read_svq3 },
3108 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
3109 { MKTAG('a','v','c','C'), mov_read_glbl },
3110 { MKTAG('p','a','s','p'), mov_read_pasp },
3111 { MKTAG('s','t','b','l'), mov_read_default },
3112 { MKTAG('s','t','c','o'), mov_read_stco },
3113 { MKTAG('s','t','p','s'), mov_read_stps },
3114 { MKTAG('s','t','r','f'), mov_read_strf },
3115 { MKTAG('s','t','s','c'), mov_read_stsc },
3116 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
3117 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
3118 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
3119 { MKTAG('s','t','t','s'), mov_read_stts },
3120 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
3121 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
3122 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
3123 { MKTAG('t','r','a','k'), mov_read_trak },
3124 { MKTAG('t','r','a','f'), mov_read_default },
3125 { MKTAG('t','r','e','f'), mov_read_default },
3126 { MKTAG('t','m','c','d'), mov_read_tmcd },
3127 { MKTAG('c','h','a','p'), mov_read_chap },
3128 { MKTAG('t','r','e','x'), mov_read_trex },
3129 { MKTAG('t','r','u','n'), mov_read_trun },
3130 { MKTAG('u','d','t','a'), mov_read_default },
3131 { MKTAG('w','a','v','e'), mov_read_wave },
3132 { MKTAG('e','s','d','s'), mov_read_esds },
3133 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
3134 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
3135 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
3136 { MKTAG('w','f','e','x'), mov_read_wfex },
3137 { MKTAG('c','m','o','v'), mov_read_cmov },
3138 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
3139 { MKTAG('d','v','c','1'), mov_read_dvc1 },
3140 { MKTAG('s','b','g','p'), mov_read_sbgp },
3141 { MKTAG('h','v','c','C'), mov_read_glbl },
3142 { MKTAG('u','u','i','d'), mov_read_uuid },
3143 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
3144 { MKTAG('-','-','-','-'), mov_read_custom },
3145 { 0, NULL }
3146 };
3147 
3148 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3149 {
3150  int64_t total_size = 0;
3151  MOVAtom a;
3152  int i;
3153 
3154  if (atom.size < 0)
3155  atom.size = INT64_MAX;
3156  while (total_size + 8 <= atom.size && !url_feof(pb)) {
3157  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
3158  a.size = atom.size;
3159  a.type=0;
3160  if (atom.size >= 8) {
3161  a.size = avio_rb32(pb);
3162  a.type = avio_rl32(pb);
3163  if (a.type == MKTAG('f','r','e','e') &&
3164  a.size >= 8 &&
3165  c->moov_retry) {
3166  uint8_t buf[8];
3167  uint32_t *type = (uint32_t *)buf + 1;
3168  avio_read(pb, buf, 8);
3169  avio_seek(pb, -8, SEEK_CUR);
3170  if (*type == MKTAG('m','v','h','d') ||
3171  *type == MKTAG('c','m','o','v')) {
3172  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
3173  a.type = MKTAG('m','o','o','v');
3174  }
3175  }
3176  if (atom.type != MKTAG('r','o','o','t') &&
3177  atom.type != MKTAG('m','o','o','v'))
3178  {
3179  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
3180  {
3181  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
3182  avio_skip(pb, -8);
3183  return 0;
3184  }
3185  }
3186  total_size += 8;
3187  if (a.size == 1) { /* 64 bit extended size */
3188  a.size = avio_rb64(pb) - 8;
3189  total_size += 8;
3190  }
3191  }
3192  av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3193  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3194  if (a.size == 0) {
3195  a.size = atom.size - total_size + 8;
3196  }
3197  a.size -= 8;
3198  if (a.size < 0)
3199  break;
3200  a.size = FFMIN(a.size, atom.size - total_size);
3201 
3202  for (i = 0; mov_default_parse_table[i].type; i++)
3203  if (mov_default_parse_table[i].type == a.type) {
3204  parse = mov_default_parse_table[i].parse;
3205  break;
3206  }
3207 
3208  // container is user data
3209  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3210  atom.type == MKTAG('i','l','s','t')))
3211  parse = mov_read_udta_string;
3212 
3213  if (!parse) { /* skip leaf atoms data */
3214  avio_skip(pb, a.size);
3215  } else {
3216  int64_t start_pos = avio_tell(pb);
3217  int64_t left;
3218  int err = parse(c, pb, a);
3219  if (err < 0)
3220  return err;
3221  if (c->found_moov && c->found_mdat &&
3222  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3223  start_pos + a.size == avio_size(pb))) {
3224  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3225  c->next_root_atom = start_pos + a.size;
3226  return 0;
3227  }
3228  left = a.size - avio_tell(pb) + start_pos;
3229  if (left > 0) /* skip garbage at atom end */
3230  avio_skip(pb, left);
3231  else if (left < 0) {
3232  av_log(c->fc, AV_LOG_WARNING,
3233  "overread end of atom '%.4s' by %"PRId64" bytes\n",
3234  (char*)&a.type, -left);
3235  avio_seek(pb, left, SEEK_CUR);
3236  }
3237  }
3238 
3239  total_size += a.size;
3240  }
3241 
3242  if (total_size < atom.size && atom.size < 0x7ffff)
3243  avio_skip(pb, atom.size - total_size);
3244 
3245  return 0;
3246 }
3247 
3248 static int mov_probe(AVProbeData *p)
3249 {
3250  int64_t offset;
3251  uint32_t tag;
3252  int score = 0;
3253  int moov_offset = -1;
3254 
3255  /* check file header */
3256  offset = 0;
3257  for (;;) {
3258  /* ignore invalid offset */
3259  if ((offset + 8) > (unsigned int)p->buf_size)
3260  break;
3261  tag = AV_RL32(p->buf + offset + 4);
3262  switch(tag) {
3263  /* check for obvious tags */
3264  case MKTAG('m','o','o','v'):
3265  moov_offset = offset + 4;
3266  case MKTAG('m','d','a','t'):
3267  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3268  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3269  case MKTAG('f','t','y','p'):
3270  if (AV_RB32(p->buf+offset) < 8 &&
3271  (AV_RB32(p->buf+offset) != 1 ||
3272  offset + 12 > (unsigned int)p->buf_size ||
3273  AV_RB64(p->buf+offset + 8) == 0)) {
3274  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3275  } else if (tag == MKTAG('f','t','y','p') &&
3276  AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')) {
3277  score = FFMAX(score, 5);
3278  } else {
3279  score = AVPROBE_SCORE_MAX;
3280  }
3281  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3282  break;
3283  /* those are more common words, so rate then a bit less */
3284  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3285  case MKTAG('w','i','d','e'):
3286  case MKTAG('f','r','e','e'):
3287  case MKTAG('j','u','n','k'):
3288  case MKTAG('p','i','c','t'):
3289  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3290  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3291  break;
3292  case MKTAG(0x82,0x82,0x7f,0x7d):
3293  case MKTAG('s','k','i','p'):
3294  case MKTAG('u','u','i','d'):
3295  case MKTAG('p','r','f','l'):
3296  /* if we only find those cause probedata is too small at least rate them */
3297  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3298  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3299  break;
3300  default:
3301  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3302  }
3303  }
3304  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3305  /* moov atom in the header - we should make sure that this is not a
3306  * MOV-packed MPEG-PS */
3307  offset = moov_offset;
3308 
3309  while(offset < (p->buf_size - 16)){ /* Sufficient space */
3310  /* We found an actual hdlr atom */
3311  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3312  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3313  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3314  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3315  /* We found a media handler reference atom describing an
3316  * MPEG-PS-in-MOV, return a
3317  * low score to force expanding the probe window until
3318  * mpegps_probe finds what it needs */
3319  return 5;
3320  }else
3321  /* Keep looking */
3322  offset+=2;
3323  }
3324  }
3325 
3326  return score;
3327 }
3328 
3329 // must be done after parsing all trak because there's no order requirement
3330 static void mov_read_chapters(AVFormatContext *s)
3331 {
3332  MOVContext *mov = s->priv_data;
3333  AVStream *st = NULL;
3334  MOVStreamContext *sc;
3335  int64_t cur_pos;
3336  int i;
3337 
3338  for (i = 0; i < s->nb_streams; i++)
3339  if (s->streams[i]->id == mov->chapter_track) {
3340  st = s->streams[i];
3341  break;
3342  }
3343  if (!st) {
3344  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3345  return;
3346  }
3347 
3348  st->discard = AVDISCARD_ALL;
3349  sc = st->priv_data;
3350  cur_pos = avio_tell(sc->pb);
3351 
3352  for (i = 0; i < st->nb_index_entries; i++) {
3353  AVIndexEntry *sample = &st->index_entries[i];
3354  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3355  uint8_t *title;
3356  uint16_t ch;
3357  int len, title_len;
3358 
3359  if (end < sample->timestamp) {
3360  av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
3361  end = AV_NOPTS_VALUE;
3362  }
3363 
3364  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3365  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3366  goto finish;
3367  }
3368 
3369  // the first two bytes are the length of the title
3370  len = avio_rb16(sc->pb);
3371  if (len > sample->size-2)
3372  continue;
3373  title_len = 2*len + 1;
3374  if (!(title = av_mallocz(title_len)))
3375  goto finish;
3376 
3377  // The samples could theoretically be in any encoding if there's an encd
3378  // atom following, but in practice are only utf-8 or utf-16, distinguished
3379  // instead by the presence of a BOM
3380  if (!len) {
3381  title[0] = 0;
3382  } else {
3383  ch = avio_rb16(sc->pb);
3384  if (ch == 0xfeff)
3385  avio_get_str16be(sc->pb, len, title, title_len);
3386  else if (ch == 0xfffe)
3387  avio_get_str16le(sc->pb, len, title, title_len);
3388  else {
3389  AV_WB16(title, ch);
3390  if (len == 1 || len == 2)
3391  title[len] = 0;
3392  else
3393  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3394  }
3395  }
3396 
3397  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3398  av_freep(&title);
3399  }
3400 finish:
3401  avio_seek(sc->pb, cur_pos, SEEK_SET);
3402 }
3403 
3404 static int parse_timecode_in_framenum_format(AVFormatContext *s, AVStream *st,
3405  uint32_t value, int flags)
3406 {
3407  AVTimecode tc;
3408  char buf[AV_TIMECODE_STR_SIZE];
3409  AVRational rate = {st->codec->time_base.den,
3410  st->codec->time_base.num};
3411  int ret = av_timecode_init(&tc, rate, flags, 0, s);
3412  if (ret < 0)
3413  return ret;
3414  av_dict_set(&st->metadata, "timecode",
3415  av_timecode_make_string(&tc, buf, value), 0);
3416  return 0;
3417 }
3418 
3419 static int mov_read_timecode_track(AVFormatContext *s, AVStream *st)
3420 {
3421  MOVStreamContext *sc = st->priv_data;
3422  int flags = 0;
3423  int64_t cur_pos = avio_tell(sc->pb);
3424  uint32_t value;
3425 
3426  if (!st->nb_index_entries)
3427  return -1;
3428 
3429  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3430  value = avio_rb32(s->pb);
3431 
3432  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3433  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3434  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3435 
3436  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3437  * not the case) and thus assume "frame number format" instead of QT one.
3438  * No sample with tmcd track can be found with a QT timecode at the moment,
3439  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3440  * format). */
3441  parse_timecode_in_framenum_format(s, st, value, flags);
3442 
3443  avio_seek(sc->pb, cur_pos, SEEK_SET);
3444  return 0;
3445 }
3446 
3447 static int mov_read_close(AVFormatContext *s)
3448 {
3449  MOVContext *mov = s->priv_data;
3450  int i, j;
3451 
3452  for (i = 0; i < s->nb_streams; i++) {
3453  AVStream *st = s->streams[i];
3454  MOVStreamContext *sc = st->priv_data;
3455 
3456  av_freep(&sc->ctts_data);
3457  for (j = 0; j < sc->drefs_count; j++) {
3458  av_freep(&sc->drefs[j].path);
3459  av_freep(&sc->drefs[j].dir);
3460  }
3461  av_freep(&sc->drefs);
3462 
3463  sc->drefs_count = 0;
3464 
3465  if (!sc->pb_is_copied)
3466  avio_close(sc->pb);
3467 
3468  sc->pb = NULL;
3469  av_freep(&sc->chunk_offsets);
3470  av_freep(&sc->stsc_data);
3471  av_freep(&sc->sample_sizes);
3472  av_freep(&sc->keyframes);
3473  av_freep(&sc->stts_data);
3474  av_freep(&sc->stps_data);
3475  av_freep(&sc->rap_group);
3476  av_freep(&sc->display_matrix);
3477  }
3478 
3479  if (mov->dv_demux) {
3480  avformat_free_context(mov->dv_fctx);
3481  mov->dv_fctx = NULL;
3482  }
3483 
3484  av_freep(&mov->trex_data);
3485  av_freep(&mov->bitrates);
3486 
3487  return 0;
3488 }
3489 
3490 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
3491 {
3492  int i;
3493 
3494  for (i = 0; i < s->nb_streams; i++) {
3495  AVStream *st = s->streams[i];
3496  MOVStreamContext *sc = st->priv_data;
3497 
3498  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3499  sc->timecode_track == tmcd_id)
3500  return 1;
3501  }
3502  return 0;
3503 }
3504 
3505 /* look for a tmcd track not referenced by any video track, and export it globally */
3506 static void export_orphan_timecode(AVFormatContext *s)
3507 {
3508  int i;
3509 
3510  for (i = 0; i < s->nb_streams; i++) {
3511  AVStream *st = s->streams[i];
3512 
3513  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
3514  !tmcd_is_referenced(s, i + 1)) {
3515  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
3516  if (tcr) {
3517  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
3518  break;
3519  }
3520  }
3521  }
3522 }
3523 
3524 static int mov_read_header(AVFormatContext *s)
3525 {
3526  MOVContext *mov = s->priv_data;
3527  AVIOContext *pb = s->pb;
3528  int j, err;
3529  MOVAtom atom = { AV_RL32("root") };
3530  int i;
3531 
3532  mov->fc = s;
3533  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
3534  if (pb->seekable)
3535  atom.size = avio_size(pb);
3536  else
3537  atom.size = INT64_MAX;
3538 
3539  /* check MOV header */
3540  do {
3541  if (mov->moov_retry)
3542  avio_seek(pb, 0, SEEK_SET);
3543  if ((err = mov_read_default(mov, pb, atom)) < 0) {
3544  av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
3545  mov_read_close(s);
3546  return err;
3547  }
3548  } while (pb->seekable && !mov->found_moov && !mov->moov_retry++);
3549  if (!mov->found_moov) {
3550  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
3551  mov_read_close(s);
3552  return AVERROR_INVALIDDATA;
3553  }
3554  av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
3555 
3556  if (pb->seekable) {
3557  if (mov->chapter_track > 0)
3558  mov_read_chapters(s);
3559  for (i = 0; i < s->nb_streams; i++)
3560  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
3561  mov_read_timecode_track(s, s->streams[i]);
3562  }
3563 
3564  /* copy timecode metadata from tmcd tracks to the related video streams */
3565  for (i = 0; i < s->nb_streams; i++) {
3566  AVStream *st = s->streams[i];
3567  MOVStreamContext *sc = st->priv_data;
3568  if (sc->timecode_track > 0) {
3569  AVDictionaryEntry *tcr;
3570  int tmcd_st_id = -1;
3571 
3572  for (j = 0; j < s->nb_streams; j++)
3573  if (s->streams[j]->id == sc->timecode_track)
3574  tmcd_st_id = j;
3575 
3576  if (tmcd_st_id < 0 || tmcd_st_id == i)
3577  continue;
3578  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
3579  if (tcr)
3580  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
3581  }
3582  }
3583  export_orphan_timecode(s);
3584 
3585  for (i = 0; i < s->nb_streams; i++) {
3586  AVStream *st = s->streams[i];
3587  MOVStreamContext *sc = st->priv_data;
3588  fix_timescale(mov, sc);
3589  if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_AAC) {
3590  st->skip_samples = sc->start_pad;
3591  }
3592  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
3593  av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3594  sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
3595  if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3596  if (st->codec->width <= 0 && st->codec->height <= 0) {
3597  st->codec->width = sc->width;
3598  st->codec->height = sc->height;
3599  }
3600  if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
3601  if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
3602  return err;
3603  }
3604  }
3605  }
3606 
3607  if (mov->trex_data) {
3608  for (i = 0; i < s->nb_streams; i++) {
3609  AVStream *st = s->streams[i];
3610  MOVStreamContext *sc = st->priv_data;
3611  if (st->duration > 0)
3612  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
3613  }
3614  }
3615 
3616  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
3617  if (mov->bitrates[i]) {
3618  s->streams[i]->codec->bit_rate = mov->bitrates[i];
3619  }
3620  }
3621 
3622  ff_rfps_calculate(s);
3623 
3624  for (i = 0; i < s->nb_streams; i++) {
3625  AVStream *st = s->streams[i];
3626  MOVStreamContext *sc = st->priv_data;
3627 
3628  switch (st->codec->codec_type) {
3629  case AVMEDIA_TYPE_AUDIO:
3630  err = ff_replaygain_export(st, s->metadata);
3631  if (err < 0) {
3632  mov_read_close(s);
3633  return err;
3634  }
3635  break;
3636  case AVMEDIA_TYPE_VIDEO:
3637  if (sc->display_matrix) {
3638  AVPacketSideData *sd, *tmp;
3639 
3640  tmp = av_realloc_array(st->side_data,
3641  st->nb_side_data + 1, sizeof(*tmp));
3642  if (!tmp)
3643  return AVERROR(ENOMEM);
3644 
3645  st->side_data = tmp;
3646  st->nb_side_data++;
3647 
3648  sd = &st->side_data[st->nb_side_data - 1];
3649  sd->type = AV_PKT_DATA_DISPLAYMATRIX;
3650  sd->size = sizeof(int32_t) * 9;
3651  sd->data = (uint8_t*)sc->display_matrix;
3652  sc->display_matrix = NULL;
3653  }
3654  break;
3655  }
3656  }
3657 
3658  return 0;
3659 }
3660 
3661 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
3662 {
3663  AVIndexEntry *sample = NULL;
3664  int64_t best_dts = INT64_MAX;
3665  int i;
3666  for (i = 0; i < s->nb_streams; i++) {
3667  AVStream *avst = s->streams[i];
3668  MOVStreamContext *msc = avst->priv_data;
3669  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
3670  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
3671  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
3672  av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
3673  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
3674  (s->pb->seekable &&
3675  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
3676  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
3677  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
3678  sample = current_sample;
3679  best_dts = dts;
3680  *st = avst;
3681  }
3682  }
3683  }
3684  return sample;
3685 }
3686 
3687 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
3688 {
3689  MOVContext *mov = s->priv_data;
3690  MOVStreamContext *sc;
3691  AVIndexEntry *sample;
3692  AVStream *st = NULL;
3693  int ret;
3694  mov->fc = s;
3695  retry:
3696  sample = mov_find_next_sample(s, &st);
3697  if (!sample) {
3698  mov->found_mdat = 0;
3699  if (!mov->next_root_atom)
3700  return AVERROR_EOF;
3701  avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
3702  mov->next_root_atom = 0;
3703  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
3704  url_feof(s->pb))
3705  return AVERROR_EOF;
3706  av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
3707  goto retry;
3708  }
3709  sc = st->priv_data;
3710  /* must be done just before reading, to avoid infinite loop on sample */
3711  sc->current_sample++;
3712 
3713  if (mov->next_root_atom) {
3714  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
3715  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
3716  }
3717 
3718  if (st->discard != AVDISCARD_ALL) {
3719  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3720  av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
3721  sc->ffindex, sample->pos);
3722  return AVERROR_INVALIDDATA;
3723  }
3724  ret = av_get_packet(sc->pb, pkt, sample->size);
3725  if (ret < 0)
3726  return ret;
3727  if (sc->has_palette) {
3728  uint8_t *pal;
3729 
3730  pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
3731  if (!pal) {
3732  av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
3733  } else {
3734  memcpy(pal, sc->palette, AVPALETTE_SIZE);
3735  sc->has_palette = 0;
3736  }
3737  }
3738 #if CONFIG_DV_DEMUXER
3739  if (mov->dv_demux && sc->dv_audio_container) {
3740  avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
3741  av_free(pkt->data);
3742  pkt->size = 0;
3743  ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
3744  if (ret < 0)
3745  return ret;
3746  }
3747 #endif
3748  }
3749 
3750  pkt->stream_index = sc->ffindex;
3751  pkt->dts = sample->timestamp;
3752  if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
3753  pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
3754  /* update ctts context */
3755  sc->ctts_sample++;
3756  if (sc->ctts_index < sc->ctts_count &&
3757  sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
3758  sc->ctts_index++;
3759  sc->ctts_sample = 0;
3760  }
3761  if (sc->wrong_dts)
3762  pkt->dts = AV_NOPTS_VALUE;
3763  } else {
3764  int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
3765  st->index_entries[sc->current_sample].timestamp : st->duration;
3766  pkt->duration = next_dts - pkt->dts;
3767  pkt->pts = pkt->dts;
3768  }
3769  if (st->discard == AVDISCARD_ALL)
3770  goto retry;
3771  pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
3772  pkt->pos = sample->pos;
3773  av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
3774  pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
3775  return 0;
3776 }
3777 
3778 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
3779 {
3780  MOVStreamContext *sc = st->priv_data;
3781  int sample, time_sample;
3782  int i;
3783 
3784  sample = av_index_search_timestamp(st, timestamp, flags);
3785  av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
3786  if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
3787  sample = 0;
3788  if (sample < 0) /* not sure what to do */
3789  return AVERROR_INVALIDDATA;
3790  sc->current_sample = sample;
3791  av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
3792  /* adjust ctts index */
3793  if (sc->ctts_data) {
3794  time_sample = 0;
3795  for (i = 0; i < sc->ctts_count; i++) {
3796  int next = time_sample + sc->ctts_data[i].count;
3797  if (next > sc->current_sample) {
3798  sc->ctts_index = i;
3799  sc->ctts_sample = sc->current_sample - time_sample;
3800  break;
3801  }
3802  time_sample = next;
3803  }
3804  }
3805  return sample;
3806 }
3807 
3808 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3809 {
3810  AVStream *st;
3811  int64_t seek_timestamp, timestamp;
3812  int sample;
3813  int i;
3814 
3815  if (stream_index >= s->nb_streams)
3816  return AVERROR_INVALIDDATA;
3817 
3818  st = s->streams[stream_index];
3819  sample = mov_seek_stream(s, st, sample_time, flags);
3820  if (sample < 0)
3821  return sample;
3822 
3823  /* adjust seek timestamp to found sample timestamp */
3824  seek_timestamp = st->index_entries[sample].timestamp;
3825 
3826  for (i = 0; i < s->nb_streams; i++) {
3827  MOVStreamContext *sc = s->streams[i]->priv_data;
3828  st = s->streams[i];
3829  st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
3830 
3831  if (stream_index == i)
3832  continue;
3833 
3834  timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
3835  mov_seek_stream(s, st, timestamp, flags);
3836  }
3837  return 0;
3838 }
3839 
3840 static const AVOption options[] = {
3841  {"use_absolute_path",
3842  "allow using absolute path when opening alias, this is a possible security issue",
3843  offsetof(MOVContext, use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
3844  0, 1, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_DECODING_PARAM},
3845  {"ignore_editlist", "", offsetof(MOVContext, ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
3846  0, 1, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_DECODING_PARAM},
3847  {NULL}
3848 };
3849 
3850 static const AVClass mov_class = {
3851  .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
3852  .item_name = av_default_item_name,
3853  .option = options,
3854  .version = LIBAVUTIL_VERSION_INT,
3855 };
3856 
3857 AVInputFormat ff_mov_demuxer = {
3858  .name = "mov,mp4,m4a,3gp,3g2,mj2",
3859  .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
3860  .priv_data_size = sizeof(MOVContext),
3861  .extensions = "mov,mp4,m4a,3gp,3g2,mj2",
3862  .read_probe = mov_probe,
3863  .read_header = mov_read_header,
3864  .read_packet = mov_read_packet,
3865  .read_close = mov_read_close,
3866  .read_seek = mov_read_seek,
3867  .priv_class = &mov_class,
3868  .flags = AVFMT_NO_BYTE_SEEK,
3869 };
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