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mov.c
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1 /*
2  * MOV demuxer
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5  *
6  * first version by Francois Revol <revol@free.fr>
7  * seek function by Gael Chardon <gael.dev@4now.net>
8  *
9  * This file is part of FFmpeg.
10  *
11  * FFmpeg is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * FFmpeg is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with FFmpeg; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
26 #include <inttypes.h>
27 #include <limits.h>
28 #include <stdint.h>
29 
30 #include "libavutil/attributes.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/intfloat.h"
35 #include "libavutil/mathematics.h"
37 #include "libavutil/avassert.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/dict.h"
40 #include "libavutil/display.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/aes.h"
43 #include "libavutil/aes_ctr.h"
44 #include "libavutil/pixdesc.h"
45 #include "libavutil/sha.h"
46 #include "libavutil/spherical.h"
47 #include "libavutil/stereo3d.h"
48 #include "libavutil/timecode.h"
49 #include "libavcodec/ac3tab.h"
50 #include "libavcodec/flac.h"
52 #include "avformat.h"
53 #include "internal.h"
54 #include "avio_internal.h"
55 #include "riff.h"
56 #include "isom.h"
57 #include "libavcodec/get_bits.h"
58 #include "id3v1.h"
59 #include "mov_chan.h"
60 #include "replaygain.h"
61 
62 #if CONFIG_ZLIB
63 #include <zlib.h>
64 #endif
65 
66 #include "qtpalette.h"
67 
68 /* those functions parse an atom */
69 /* links atom IDs to parse functions */
70 typedef struct MOVParseTableEntry {
71  uint32_t type;
74 
75 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
76 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
77 
79  unsigned len, const char *key)
80 {
81  char buf[16];
82 
83  short current, total = 0;
84  avio_rb16(pb); // unknown
85  current = avio_rb16(pb);
86  if (len >= 6)
87  total = avio_rb16(pb);
88  if (!total)
89  snprintf(buf, sizeof(buf), "%d", current);
90  else
91  snprintf(buf, sizeof(buf), "%d/%d", current, total);
93  av_dict_set(&c->fc->metadata, key, buf, 0);
94 
95  return 0;
96 }
97 
99  unsigned len, const char *key)
100 {
101  /* bypass padding bytes */
102  avio_r8(pb);
103  avio_r8(pb);
104  avio_r8(pb);
105 
107  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
108 
109  return 0;
110 }
111 
113  unsigned len, const char *key)
114 {
116  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
117 
118  return 0;
119 }
120 
122  unsigned len, const char *key)
123 {
124  short genre;
125 
126  avio_r8(pb); // unknown
127 
128  genre = avio_r8(pb);
129  if (genre < 1 || genre > ID3v1_GENRE_MAX)
130  return 0;
132  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
133 
134  return 0;
135 }
136 
137 static const uint32_t mac_to_unicode[128] = {
138  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
139  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
140  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
141  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
142  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
143  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
144  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
145  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
146  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
147  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
148  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
149  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
150  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
151  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
152  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
153  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
154 };
155 
157  char *dst, int dstlen)
158 {
159  char *p = dst;
160  char *end = dst+dstlen-1;
161  int i;
162 
163  for (i = 0; i < len; i++) {
164  uint8_t t, c = avio_r8(pb);
165 
166  if (p >= end)
167  continue;
168 
169  if (c < 0x80)
170  *p++ = c;
171  else if (p < end)
172  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
173  }
174  *p = 0;
175  return p - dst;
176 }
177 
178 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
179 {
180  AVPacket pkt;
181  AVStream *st;
182  MOVStreamContext *sc;
183  enum AVCodecID id;
184  int ret;
185 
186  switch (type) {
187  case 0xd: id = AV_CODEC_ID_MJPEG; break;
188  case 0xe: id = AV_CODEC_ID_PNG; break;
189  case 0x1b: id = AV_CODEC_ID_BMP; break;
190  default:
191  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
192  avio_skip(pb, len);
193  return 0;
194  }
195 
196  st = avformat_new_stream(c->fc, NULL);
197  if (!st)
198  return AVERROR(ENOMEM);
199  sc = av_mallocz(sizeof(*sc));
200  if (!sc)
201  return AVERROR(ENOMEM);
202  st->priv_data = sc;
203 
204  ret = av_get_packet(pb, &pkt, len);
205  if (ret < 0)
206  return ret;
207 
208  if (pkt.size >= 8 && id != AV_CODEC_ID_BMP) {
209  if (AV_RB64(pkt.data) == 0x89504e470d0a1a0a) {
210  id = AV_CODEC_ID_PNG;
211  } else {
212  id = AV_CODEC_ID_MJPEG;
213  }
214  }
215 
217 
218  st->attached_pic = pkt;
219  st->attached_pic.stream_index = st->index;
221 
223  st->codecpar->codec_id = id;
224 
225  return 0;
226 }
227 
228 // 3GPP TS 26.244
229 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
230 {
231  char language[4] = { 0 };
232  char buf[200], place[100];
233  uint16_t langcode = 0;
234  double longitude, latitude, altitude;
235  const char *key = "location";
236 
237  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
238  av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
239  return AVERROR_INVALIDDATA;
240  }
241 
242  avio_skip(pb, 4); // version+flags
243  langcode = avio_rb16(pb);
244  ff_mov_lang_to_iso639(langcode, language);
245  len -= 6;
246 
247  len -= avio_get_str(pb, len, place, sizeof(place));
248  if (len < 1) {
249  av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
250  return AVERROR_INVALIDDATA;
251  }
252  avio_skip(pb, 1); // role
253  len -= 1;
254 
255  if (len < 12) {
256  av_log(c->fc, AV_LOG_ERROR,
257  "loci too short (%u bytes left, need at least %d)\n", len, 12);
258  return AVERROR_INVALIDDATA;
259  }
260  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
261  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
262  altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
263 
264  // Try to output in the same format as the ?xyz field
265  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
266  if (altitude)
267  av_strlcatf(buf, sizeof(buf), "%+f", altitude);
268  av_strlcatf(buf, sizeof(buf), "/%s", place);
269 
270  if (*language && strcmp(language, "und")) {
271  char key2[16];
272  snprintf(key2, sizeof(key2), "%s-%s", key, language);
273  av_dict_set(&c->fc->metadata, key2, buf, 0);
274  }
276  return av_dict_set(&c->fc->metadata, key, buf, 0);
277 }
278 
279 static int mov_metadata_hmmt(MOVContext *c, AVIOContext *pb, unsigned len)
280 {
281  int i, n_hmmt;
282 
283  if (len < 2)
284  return 0;
285  if (c->ignore_chapters)
286  return 0;
287 
288  n_hmmt = avio_rb32(pb);
289  for (i = 0; i < n_hmmt && !pb->eof_reached; i++) {
290  int moment_time = avio_rb32(pb);
291  avpriv_new_chapter(c->fc, i, av_make_q(1, 1000), moment_time, AV_NOPTS_VALUE, NULL);
292  }
293  return 0;
294 }
295 
297 {
298  char tmp_key[5];
299  char key2[32], language[4] = {0};
300  char *str = NULL;
301  const char *key = NULL;
302  uint16_t langcode = 0;
303  uint32_t data_type = 0, str_size, str_size_alloc;
304  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
305  int raw = 0;
306  int num = 0;
307 
308  switch (atom.type) {
309  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
310  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
311  case MKTAG( 'X','M','P','_'):
312  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
313  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
314  case MKTAG( 'a','k','I','D'): key = "account_type";
316  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
317  case MKTAG( 'c','a','t','g'): key = "category"; break;
318  case MKTAG( 'c','p','i','l'): key = "compilation";
320  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
321  case MKTAG( 'd','e','s','c'): key = "description"; break;
322  case MKTAG( 'd','i','s','k'): key = "disc";
324  case MKTAG( 'e','g','i','d'): key = "episode_uid";
326  case MKTAG( 'F','I','R','M'): key = "firmware"; raw = 1; break;
327  case MKTAG( 'g','n','r','e'): key = "genre";
328  parse = mov_metadata_gnre; break;
329  case MKTAG( 'h','d','v','d'): key = "hd_video";
331  case MKTAG( 'H','M','M','T'):
332  return mov_metadata_hmmt(c, pb, atom.size);
333  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
334  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
335  case MKTAG( 'l','o','c','i'):
336  return mov_metadata_loci(c, pb, atom.size);
337  case MKTAG( 'p','c','s','t'): key = "podcast";
339  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
341  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
342  case MKTAG( 'r','t','n','g'): key = "rating";
344  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
345  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
346  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
347  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
348  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
349  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
350  case MKTAG( 's','t','i','k'): key = "media_type";
352  case MKTAG( 't','r','k','n'): key = "track";
354  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
355  case MKTAG( 't','v','e','s'): key = "episode_sort";
357  case MKTAG( 't','v','n','n'): key = "network"; break;
358  case MKTAG( 't','v','s','h'): key = "show"; break;
359  case MKTAG( 't','v','s','n'): key = "season_number";
361  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
362  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
363  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
364  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
365  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
366  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
367  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
368  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
369  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
370  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
371  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
372  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
373  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
374  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
375  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
376  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
377  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
378  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
379  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
380  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
381  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
382  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
383  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
384  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
385  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
386  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
387  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
388  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
389  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
390  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
391  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
392  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
393  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
394  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
395  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
396  }
397 retry:
398  if (c->itunes_metadata && atom.size > 8) {
399  int data_size = avio_rb32(pb);
400  int tag = avio_rl32(pb);
401  if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
402  data_type = avio_rb32(pb); // type
403  avio_rb32(pb); // unknown
404  str_size = data_size - 16;
405  atom.size -= 16;
406 
407  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
408  int ret = mov_read_covr(c, pb, data_type, str_size);
409  if (ret < 0) {
410  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
411  }
412  return ret;
413  } else if (!key && c->found_hdlr_mdta && c->meta_keys) {
414  uint32_t index = AV_RB32(&atom.type);
415  if (index < c->meta_keys_count && index > 0) {
416  key = c->meta_keys[index];
417  } else {
419  "The index of 'data' is out of range: %"PRId32" < 1 or >= %d.\n",
420  index, c->meta_keys_count);
421  }
422  }
423  } else return 0;
424  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
425  str_size = avio_rb16(pb); // string length
426  if (str_size > atom.size) {
427  raw = 1;
428  avio_seek(pb, -2, SEEK_CUR);
429  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
430  goto retry;
431  }
432  langcode = avio_rb16(pb);
433  ff_mov_lang_to_iso639(langcode, language);
434  atom.size -= 4;
435  } else
436  str_size = atom.size;
437 
438  if (c->export_all && !key) {
439  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
440  key = tmp_key;
441  }
442 
443  if (!key)
444  return 0;
445  if (atom.size < 0 || str_size >= INT_MAX/2)
446  return AVERROR_INVALIDDATA;
447 
448  // Allocates enough space if data_type is a int32 or float32 number, otherwise
449  // worst-case requirement for output string in case of utf8 coded input
450  num = (data_type >= 21 && data_type <= 23);
451  str_size_alloc = (num ? 512 : (raw ? str_size : str_size * 2)) + 1;
452  str = av_mallocz(str_size_alloc);
453  if (!str)
454  return AVERROR(ENOMEM);
455 
456  if (parse)
457  parse(c, pb, str_size, key);
458  else {
459  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
460  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
461  } else if (data_type == 21) { // BE signed integer, variable size
462  int val = 0;
463  if (str_size == 1)
464  val = (int8_t)avio_r8(pb);
465  else if (str_size == 2)
466  val = (int16_t)avio_rb16(pb);
467  else if (str_size == 3)
468  val = ((int32_t)(avio_rb24(pb)<<8))>>8;
469  else if (str_size == 4)
470  val = (int32_t)avio_rb32(pb);
471  if (snprintf(str, str_size_alloc, "%d", val) >= str_size_alloc) {
472  av_log(c->fc, AV_LOG_ERROR,
473  "Failed to store the number (%d) in string.\n", val);
474  av_free(str);
475  return AVERROR_INVALIDDATA;
476  }
477  } else if (data_type == 22) { // BE unsigned integer, variable size
478  unsigned int val = 0;
479  if (str_size == 1)
480  val = avio_r8(pb);
481  else if (str_size == 2)
482  val = avio_rb16(pb);
483  else if (str_size == 3)
484  val = avio_rb24(pb);
485  else if (str_size == 4)
486  val = avio_rb32(pb);
487  if (snprintf(str, str_size_alloc, "%u", val) >= str_size_alloc) {
488  av_log(c->fc, AV_LOG_ERROR,
489  "Failed to store the number (%u) in string.\n", val);
490  av_free(str);
491  return AVERROR_INVALIDDATA;
492  }
493  } else if (data_type == 23 && str_size >= 4) { // BE float32
494  float val = av_int2float(avio_rb32(pb));
495  if (snprintf(str, str_size_alloc, "%f", val) >= str_size_alloc) {
496  av_log(c->fc, AV_LOG_ERROR,
497  "Failed to store the float32 number (%f) in string.\n", val);
498  av_free(str);
499  return AVERROR_INVALIDDATA;
500  }
501  } else {
502  int ret = ffio_read_size(pb, str, str_size);
503  if (ret < 0) {
504  av_free(str);
505  return ret;
506  }
507  str[str_size] = 0;
508  }
510  av_dict_set(&c->fc->metadata, key, str, 0);
511  if (*language && strcmp(language, "und")) {
512  snprintf(key2, sizeof(key2), "%s-%s", key, language);
513  av_dict_set(&c->fc->metadata, key2, str, 0);
514  }
515  if (!strcmp(key, "encoder")) {
516  int major, minor, micro;
517  if (sscanf(str, "HandBrake %d.%d.%d", &major, &minor, &micro) == 3) {
518  c->handbrake_version = 1000000*major + 1000*minor + micro;
519  }
520  }
521  }
522 
523  av_freep(&str);
524  return 0;
525 }
526 
528 {
529  int64_t start;
530  int i, nb_chapters, str_len, version;
531  char str[256+1];
532  int ret;
533 
534  if (c->ignore_chapters)
535  return 0;
536 
537  if ((atom.size -= 5) < 0)
538  return 0;
539 
540  version = avio_r8(pb);
541  avio_rb24(pb);
542  if (version)
543  avio_rb32(pb); // ???
544  nb_chapters = avio_r8(pb);
545 
546  for (i = 0; i < nb_chapters; i++) {
547  if (atom.size < 9)
548  return 0;
549 
550  start = avio_rb64(pb);
551  str_len = avio_r8(pb);
552 
553  if ((atom.size -= 9+str_len) < 0)
554  return 0;
555 
556  ret = ffio_read_size(pb, str, str_len);
557  if (ret < 0)
558  return ret;
559  str[str_len] = 0;
560  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
561  }
562  return 0;
563 }
564 
565 #define MIN_DATA_ENTRY_BOX_SIZE 12
567 {
568  AVStream *st;
569  MOVStreamContext *sc;
570  int entries, i, j;
571 
572  if (c->fc->nb_streams < 1)
573  return 0;
574  st = c->fc->streams[c->fc->nb_streams-1];
575  sc = st->priv_data;
576 
577  avio_rb32(pb); // version + flags
578  entries = avio_rb32(pb);
579  if (!entries ||
580  entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
581  entries >= UINT_MAX / sizeof(*sc->drefs))
582  return AVERROR_INVALIDDATA;
583  sc->drefs_count = 0;
584  av_free(sc->drefs);
585  sc->drefs_count = 0;
586  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
587  if (!sc->drefs)
588  return AVERROR(ENOMEM);
589  sc->drefs_count = entries;
590 
591  for (i = 0; i < entries; i++) {
592  MOVDref *dref = &sc->drefs[i];
593  uint32_t size = avio_rb32(pb);
594  int64_t next = avio_tell(pb) + size - 4;
595 
596  if (size < 12)
597  return AVERROR_INVALIDDATA;
598 
599  dref->type = avio_rl32(pb);
600  avio_rb32(pb); // version + flags
601 
602  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
603  /* macintosh alias record */
604  uint16_t volume_len, len;
605  int16_t type;
606  int ret;
607 
608  avio_skip(pb, 10);
609 
610  volume_len = avio_r8(pb);
611  volume_len = FFMIN(volume_len, 27);
612  ret = ffio_read_size(pb, dref->volume, 27);
613  if (ret < 0)
614  return ret;
615  dref->volume[volume_len] = 0;
616  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
617 
618  avio_skip(pb, 12);
619 
620  len = avio_r8(pb);
621  len = FFMIN(len, 63);
622  ret = ffio_read_size(pb, dref->filename, 63);
623  if (ret < 0)
624  return ret;
625  dref->filename[len] = 0;
626  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
627 
628  avio_skip(pb, 16);
629 
630  /* read next level up_from_alias/down_to_target */
631  dref->nlvl_from = avio_rb16(pb);
632  dref->nlvl_to = avio_rb16(pb);
633  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
634  dref->nlvl_from, dref->nlvl_to);
635 
636  avio_skip(pb, 16);
637 
638  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
639  if(avio_feof(pb))
640  return AVERROR_EOF;
641  type = avio_rb16(pb);
642  len = avio_rb16(pb);
643  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
644  if (len&1)
645  len += 1;
646  if (type == 2) { // absolute path
647  av_free(dref->path);
648  dref->path = av_mallocz(len+1);
649  if (!dref->path)
650  return AVERROR(ENOMEM);
651 
652  ret = ffio_read_size(pb, dref->path, len);
653  if (ret < 0) {
654  av_freep(&dref->path);
655  return ret;
656  }
657  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
658  len -= volume_len;
659  memmove(dref->path, dref->path+volume_len, len);
660  dref->path[len] = 0;
661  }
662  // trim string of any ending zeros
663  for (j = len - 1; j >= 0; j--) {
664  if (dref->path[j] == 0)
665  len--;
666  else
667  break;
668  }
669  for (j = 0; j < len; j++)
670  if (dref->path[j] == ':' || dref->path[j] == 0)
671  dref->path[j] = '/';
672  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
673  } else if (type == 0) { // directory name
674  av_free(dref->dir);
675  dref->dir = av_malloc(len+1);
676  if (!dref->dir)
677  return AVERROR(ENOMEM);
678 
679  ret = ffio_read_size(pb, dref->dir, len);
680  if (ret < 0) {
681  av_freep(&dref->dir);
682  return ret;
683  }
684  dref->dir[len] = 0;
685  for (j = 0; j < len; j++)
686  if (dref->dir[j] == ':')
687  dref->dir[j] = '/';
688  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
689  } else
690  avio_skip(pb, len);
691  }
692  } else {
693  av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x%08"PRIx32" size %"PRIu32"\n",
694  dref->type, size);
695  entries--;
696  i--;
697  }
698  avio_seek(pb, next, SEEK_SET);
699  }
700  return 0;
701 }
702 
704 {
705  AVStream *st;
706  uint32_t type;
707  uint32_t ctype;
708  int64_t title_size;
709  char *title_str;
710  int ret;
711 
712  avio_r8(pb); /* version */
713  avio_rb24(pb); /* flags */
714 
715  /* component type */
716  ctype = avio_rl32(pb);
717  type = avio_rl32(pb); /* component subtype */
718 
719  av_log(c->fc, AV_LOG_TRACE, "ctype=%s\n", av_fourcc2str(ctype));
720  av_log(c->fc, AV_LOG_TRACE, "stype=%s\n", av_fourcc2str(type));
721 
722  if (c->trak_index < 0) { // meta not inside a trak
723  if (type == MKTAG('m','d','t','a')) {
724  c->found_hdlr_mdta = 1;
725  }
726  return 0;
727  }
728 
729  st = c->fc->streams[c->fc->nb_streams-1];
730 
731  if (type == MKTAG('v','i','d','e'))
733  else if (type == MKTAG('s','o','u','n'))
735  else if (type == MKTAG('m','1','a',' '))
737  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
739 
740  avio_rb32(pb); /* component manufacture */
741  avio_rb32(pb); /* component flags */
742  avio_rb32(pb); /* component flags mask */
743 
744  title_size = atom.size - 24;
745  if (title_size > 0) {
746  if (title_size > FFMIN(INT_MAX, SIZE_MAX-1))
747  return AVERROR_INVALIDDATA;
748  title_str = av_malloc(title_size + 1); /* Add null terminator */
749  if (!title_str)
750  return AVERROR(ENOMEM);
751 
752  ret = ffio_read_size(pb, title_str, title_size);
753  if (ret < 0) {
754  av_freep(&title_str);
755  return ret;
756  }
757  title_str[title_size] = 0;
758  if (title_str[0]) {
759  int off = (!c->isom && title_str[0] == title_size - 1);
760  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
761  }
762  av_freep(&title_str);
763  }
764 
765  return 0;
766 }
767 
769 {
770  AVStream *st;
771  int tag;
772 
773  if (fc->nb_streams < 1)
774  return 0;
775  st = fc->streams[fc->nb_streams-1];
776 
777  avio_rb32(pb); /* version + flags */
778  ff_mp4_read_descr(fc, pb, &tag);
779  if (tag == MP4ESDescrTag) {
781  } else
782  avio_rb16(pb); /* ID */
783 
784  ff_mp4_read_descr(fc, pb, &tag);
785  if (tag == MP4DecConfigDescrTag)
786  ff_mp4_read_dec_config_descr(fc, st, pb);
787  return 0;
788 }
789 
791 {
792  return ff_mov_read_esds(c->fc, pb);
793 }
794 
796 {
797  AVStream *st;
798  enum AVAudioServiceType *ast;
799  int ac3info, acmod, lfeon, bsmod;
800 
801  if (c->fc->nb_streams < 1)
802  return 0;
803  st = c->fc->streams[c->fc->nb_streams-1];
804 
806  sizeof(*ast));
807  if (!ast)
808  return AVERROR(ENOMEM);
809 
810  ac3info = avio_rb24(pb);
811  bsmod = (ac3info >> 14) & 0x7;
812  acmod = (ac3info >> 11) & 0x7;
813  lfeon = (ac3info >> 10) & 0x1;
814  st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
816  if (lfeon)
818  *ast = bsmod;
819  if (st->codecpar->channels > 1 && bsmod == 0x7)
821 
822 #if FF_API_LAVF_AVCTX
824  st->codec->audio_service_type = *ast;
826 #endif
827 
828  return 0;
829 }
830 
832 {
833  AVStream *st;
834  enum AVAudioServiceType *ast;
835  int eac3info, acmod, lfeon, bsmod;
836 
837  if (c->fc->nb_streams < 1)
838  return 0;
839  st = c->fc->streams[c->fc->nb_streams-1];
840 
842  sizeof(*ast));
843  if (!ast)
844  return AVERROR(ENOMEM);
845 
846  /* No need to parse fields for additional independent substreams and its
847  * associated dependent substreams since libavcodec's E-AC-3 decoder
848  * does not support them yet. */
849  avio_rb16(pb); /* data_rate and num_ind_sub */
850  eac3info = avio_rb24(pb);
851  bsmod = (eac3info >> 12) & 0x1f;
852  acmod = (eac3info >> 9) & 0x7;
853  lfeon = (eac3info >> 8) & 0x1;
855  if (lfeon)
858  *ast = bsmod;
859  if (st->codecpar->channels > 1 && bsmod == 0x7)
861 
862 #if FF_API_LAVF_AVCTX
864  st->codec->audio_service_type = *ast;
866 #endif
867 
868  return 0;
869 }
870 
872 {
873  const uint32_t ddts_size = 20;
874  AVStream *st = NULL;
875  uint8_t *buf = NULL;
876  uint32_t frame_duration_code = 0;
877  uint32_t channel_layout_code = 0;
878  GetBitContext gb;
879 
880  buf = av_malloc(ddts_size + AV_INPUT_BUFFER_PADDING_SIZE);
881  if (!buf) {
882  return AVERROR(ENOMEM);
883  }
884  if (avio_read(pb, buf, ddts_size) < ddts_size) {
885  av_free(buf);
886  return AVERROR_INVALIDDATA;
887  }
888 
889  init_get_bits(&gb, buf, 8*ddts_size);
890 
891  if (c->fc->nb_streams < 1) {
892  av_free(buf);
893  return 0;
894  }
895  st = c->fc->streams[c->fc->nb_streams-1];
896 
897  st->codecpar->sample_rate = get_bits_long(&gb, 32);
898  if (st->codecpar->sample_rate <= 0) {
899  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
900  av_free(buf);
901  return AVERROR_INVALIDDATA;
902  }
903  skip_bits_long(&gb, 32); /* max bitrate */
904  st->codecpar->bit_rate = get_bits_long(&gb, 32);
905  st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
906  frame_duration_code = get_bits(&gb, 2);
907  skip_bits(&gb, 30); /* various fields */
908  channel_layout_code = get_bits(&gb, 16);
909 
910  st->codecpar->frame_size =
911  (frame_duration_code == 0) ? 512 :
912  (frame_duration_code == 1) ? 1024 :
913  (frame_duration_code == 2) ? 2048 :
914  (frame_duration_code == 3) ? 4096 : 0;
915 
916  if (channel_layout_code > 0xff) {
917  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
918  }
919  st->codecpar->channel_layout =
920  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
921  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
922  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
923  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
924  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
925  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
926 
928  av_free(buf);
929 
930  return 0;
931 }
932 
934 {
935  AVStream *st;
936 
937  if (c->fc->nb_streams < 1)
938  return 0;
939  st = c->fc->streams[c->fc->nb_streams-1];
940 
941  if (atom.size < 16)
942  return 0;
943 
944  /* skip version and flags */
945  avio_skip(pb, 4);
946 
947  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
948 
949  return 0;
950 }
951 
953 {
954  AVStream *st;
955  int ret;
956 
957  if (c->fc->nb_streams < 1)
958  return 0;
959  st = c->fc->streams[c->fc->nb_streams-1];
960 
961  if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
962  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
963 
964  return ret;
965 }
966 
968 {
969  const int num = avio_rb32(pb);
970  const int den = avio_rb32(pb);
971  AVStream *st;
972 
973  if (c->fc->nb_streams < 1)
974  return 0;
975  st = c->fc->streams[c->fc->nb_streams-1];
976 
977  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
978  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
980  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
982  num, den);
983  } else if (den != 0) {
985  num, den, 32767);
986  }
987  return 0;
988 }
989 
990 /* this atom contains actual media data */
992 {
993  if (atom.size == 0) /* wrong one (MP4) */
994  return 0;
995  c->found_mdat=1;
996  return 0; /* now go for moov */
997 }
998 
999 #define DRM_BLOB_SIZE 56
1000 
1002 {
1003  uint8_t intermediate_key[20];
1004  uint8_t intermediate_iv[20];
1005  uint8_t input[64];
1006  uint8_t output[64];
1007  uint8_t file_checksum[20];
1008  uint8_t calculated_checksum[20];
1009  struct AVSHA *sha;
1010  int i;
1011  int ret = 0;
1012  uint8_t *activation_bytes = c->activation_bytes;
1013  uint8_t *fixed_key = c->audible_fixed_key;
1014 
1015  c->aax_mode = 1;
1016 
1017  sha = av_sha_alloc();
1018  if (!sha)
1019  return AVERROR(ENOMEM);
1020  c->aes_decrypt = av_aes_alloc();
1021  if (!c->aes_decrypt) {
1022  ret = AVERROR(ENOMEM);
1023  goto fail;
1024  }
1025 
1026  /* drm blob processing */
1027  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
1028  avio_read(pb, input, DRM_BLOB_SIZE);
1029  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
1030  avio_read(pb, file_checksum, 20);
1031 
1032  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
1033  for (i = 0; i < 20; i++)
1034  av_log(c->fc, AV_LOG_INFO, "%02x", file_checksum[i]);
1035  av_log(c->fc, AV_LOG_INFO, "\n");
1036 
1037  /* verify activation data */
1038  if (!activation_bytes) {
1039  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
1040  ret = 0; /* allow ffprobe to continue working on .aax files */
1041  goto fail;
1042  }
1043  if (c->activation_bytes_size != 4) {
1044  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
1045  ret = AVERROR(EINVAL);
1046  goto fail;
1047  }
1048 
1049  /* verify fixed key */
1050  if (c->audible_fixed_key_size != 16) {
1051  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
1052  ret = AVERROR(EINVAL);
1053  goto fail;
1054  }
1055 
1056  /* AAX (and AAX+) key derivation */
1057  av_sha_init(sha, 160);
1058  av_sha_update(sha, fixed_key, 16);
1059  av_sha_update(sha, activation_bytes, 4);
1060  av_sha_final(sha, intermediate_key);
1061  av_sha_init(sha, 160);
1062  av_sha_update(sha, fixed_key, 16);
1063  av_sha_update(sha, intermediate_key, 20);
1064  av_sha_update(sha, activation_bytes, 4);
1065  av_sha_final(sha, intermediate_iv);
1066  av_sha_init(sha, 160);
1067  av_sha_update(sha, intermediate_key, 16);
1068  av_sha_update(sha, intermediate_iv, 16);
1069  av_sha_final(sha, calculated_checksum);
1070  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1071  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1072  ret = AVERROR_INVALIDDATA;
1073  goto fail;
1074  }
1075  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1076  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1077  for (i = 0; i < 4; i++) {
1078  // file data (in output) is stored in big-endian mode
1079  if (activation_bytes[i] != output[3 - i]) { // critical error
1080  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1081  ret = AVERROR_INVALIDDATA;
1082  goto fail;
1083  }
1084  }
1085  memcpy(c->file_key, output + 8, 16);
1086  memcpy(input, output + 26, 16);
1087  av_sha_init(sha, 160);
1088  av_sha_update(sha, input, 16);
1089  av_sha_update(sha, c->file_key, 16);
1090  av_sha_update(sha, fixed_key, 16);
1091  av_sha_final(sha, c->file_iv);
1092 
1093 fail:
1094  av_free(sha);
1095 
1096  return ret;
1097 }
1098 
1099 // Audible AAX (and AAX+) bytestream decryption
1100 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1101 {
1102  int blocks = 0;
1103  unsigned char iv[16];
1104 
1105  memcpy(iv, c->file_iv, 16); // iv is overwritten
1106  blocks = size >> 4; // trailing bytes are not encrypted!
1107  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1108  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1109 
1110  return 0;
1111 }
1112 
1113 /* read major brand, minor version and compatible brands and store them as metadata */
1115 {
1116  uint32_t minor_ver;
1117  int comp_brand_size;
1118  char* comp_brands_str;
1119  uint8_t type[5] = {0};
1120  int ret = ffio_read_size(pb, type, 4);
1121  if (ret < 0)
1122  return ret;
1123 
1124  if (strcmp(type, "qt "))
1125  c->isom = 1;
1126  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1127  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1128  minor_ver = avio_rb32(pb); /* minor version */
1129  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1130 
1131  comp_brand_size = atom.size - 8;
1132  if (comp_brand_size < 0)
1133  return AVERROR_INVALIDDATA;
1134  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1135  if (!comp_brands_str)
1136  return AVERROR(ENOMEM);
1137 
1138  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1139  if (ret < 0) {
1140  av_freep(&comp_brands_str);
1141  return ret;
1142  }
1143  comp_brands_str[comp_brand_size] = 0;
1144  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1145  av_freep(&comp_brands_str);
1146 
1147  return 0;
1148 }
1149 
1150 /* this atom should contain all header atoms */
1152 {
1153  int ret;
1154 
1155  if (c->found_moov) {
1156  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1157  avio_skip(pb, atom.size);
1158  return 0;
1159  }
1160 
1161  if ((ret = mov_read_default(c, pb, atom)) < 0)
1162  return ret;
1163  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1164  /* so we don't parse the whole file if over a network */
1165  c->found_moov=1;
1166  return 0; /* now go for mdat */
1167 }
1168 
1170 {
1171  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1172  c->has_looked_for_mfra = 1;
1173  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1174  int ret;
1175  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1176  "for a mfra\n");
1177  if ((ret = mov_read_mfra(c, pb)) < 0) {
1178  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1179  "read the mfra (may be a live ismv)\n");
1180  }
1181  } else {
1182  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1183  "seekable, can not look for mfra\n");
1184  }
1185  }
1187  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1188  return mov_read_default(c, pb, atom);
1189 }
1190 
1191 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1192 {
1193  if (time) {
1194  if(time >= 2082844800)
1195  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1196 
1197  if ((int64_t)(time * 1000000ULL) / 1000000 != time) {
1198  av_log(NULL, AV_LOG_DEBUG, "creation_time is not representable\n");
1199  return;
1200  }
1201 
1202  avpriv_dict_set_timestamp(metadata, "creation_time", time * 1000000);
1203  }
1204 }
1205 
1207 {
1208  AVStream *st;
1209  MOVStreamContext *sc;
1210  int version;
1211  char language[4] = {0};
1212  unsigned lang;
1213  int64_t creation_time;
1214 
1215  if (c->fc->nb_streams < 1)
1216  return 0;
1217  st = c->fc->streams[c->fc->nb_streams-1];
1218  sc = st->priv_data;
1219 
1220  if (sc->time_scale) {
1221  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1222  return AVERROR_INVALIDDATA;
1223  }
1224 
1225  version = avio_r8(pb);
1226  if (version > 1) {
1227  avpriv_request_sample(c->fc, "Version %d", version);
1228  return AVERROR_PATCHWELCOME;
1229  }
1230  avio_rb24(pb); /* flags */
1231  if (version == 1) {
1232  creation_time = avio_rb64(pb);
1233  avio_rb64(pb);
1234  } else {
1235  creation_time = avio_rb32(pb);
1236  avio_rb32(pb); /* modification time */
1237  }
1238  mov_metadata_creation_time(&st->metadata, creation_time);
1239 
1240  sc->time_scale = avio_rb32(pb);
1241  if (sc->time_scale <= 0) {
1242  av_log(c->fc, AV_LOG_ERROR, "Invalid mdhd time scale %d, defaulting to 1\n", sc->time_scale);
1243  sc->time_scale = 1;
1244  }
1245  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1246 
1247  lang = avio_rb16(pb); /* language */
1248  if (ff_mov_lang_to_iso639(lang, language))
1249  av_dict_set(&st->metadata, "language", language, 0);
1250  avio_rb16(pb); /* quality */
1251 
1252  return 0;
1253 }
1254 
1256 {
1257  int i;
1258  int64_t creation_time;
1259  int version = avio_r8(pb); /* version */
1260  avio_rb24(pb); /* flags */
1261 
1262  if (version == 1) {
1263  creation_time = avio_rb64(pb);
1264  avio_rb64(pb);
1265  } else {
1266  creation_time = avio_rb32(pb);
1267  avio_rb32(pb); /* modification time */
1268  }
1269  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1270  c->time_scale = avio_rb32(pb); /* time scale */
1271  if (c->time_scale <= 0) {
1272  av_log(c->fc, AV_LOG_ERROR, "Invalid mvhd time scale %d, defaulting to 1\n", c->time_scale);
1273  c->time_scale = 1;
1274  }
1275  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1276 
1277  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1278  // set the AVCodecContext duration because the duration of individual tracks
1279  // may be inaccurate
1280  if (c->time_scale > 0 && !c->trex_data)
1282  avio_rb32(pb); /* preferred scale */
1283 
1284  avio_rb16(pb); /* preferred volume */
1285 
1286  avio_skip(pb, 10); /* reserved */
1287 
1288  /* movie display matrix, store it in main context and use it later on */
1289  for (i = 0; i < 3; i++) {
1290  c->movie_display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
1291  c->movie_display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
1292  c->movie_display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
1293  }
1294 
1295  avio_rb32(pb); /* preview time */
1296  avio_rb32(pb); /* preview duration */
1297  avio_rb32(pb); /* poster time */
1298  avio_rb32(pb); /* selection time */
1299  avio_rb32(pb); /* selection duration */
1300  avio_rb32(pb); /* current time */
1301  avio_rb32(pb); /* next track ID */
1302 
1303  return 0;
1304 }
1305 
1307 {
1308  AVStream *st;
1309  int little_endian;
1310 
1311  if (c->fc->nb_streams < 1)
1312  return 0;
1313  st = c->fc->streams[c->fc->nb_streams-1];
1314 
1315  little_endian = avio_rb16(pb) & 0xFF;
1316  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1317  if (little_endian == 1) {
1318  switch (st->codecpar->codec_id) {
1319  case AV_CODEC_ID_PCM_S24BE:
1321  break;
1322  case AV_CODEC_ID_PCM_S32BE:
1324  break;
1325  case AV_CODEC_ID_PCM_F32BE:
1327  break;
1328  case AV_CODEC_ID_PCM_F64BE:
1330  break;
1331  default:
1332  break;
1333  }
1334  }
1335  return 0;
1336 }
1337 
1339 {
1340  AVStream *st;
1341  char color_parameter_type[5] = { 0 };
1342  uint16_t color_primaries, color_trc, color_matrix;
1343  int ret;
1344 
1345  if (c->fc->nb_streams < 1)
1346  return 0;
1347  st = c->fc->streams[c->fc->nb_streams - 1];
1348 
1349  ret = ffio_read_size(pb, color_parameter_type, 4);
1350  if (ret < 0)
1351  return ret;
1352  if (strncmp(color_parameter_type, "nclx", 4) &&
1353  strncmp(color_parameter_type, "nclc", 4)) {
1354  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1355  color_parameter_type);
1356  return 0;
1357  }
1358 
1359  color_primaries = avio_rb16(pb);
1360  color_trc = avio_rb16(pb);
1361  color_matrix = avio_rb16(pb);
1362 
1363  av_log(c->fc, AV_LOG_TRACE,
1364  "%s: pri %d trc %d matrix %d",
1365  color_parameter_type, color_primaries, color_trc, color_matrix);
1366 
1367  if (!strncmp(color_parameter_type, "nclx", 4)) {
1368  uint8_t color_range = avio_r8(pb) >> 7;
1369  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1370  if (color_range)
1372  else
1374  }
1375 
1376  if (!av_color_primaries_name(color_primaries))
1377  color_primaries = AVCOL_PRI_UNSPECIFIED;
1378  if (!av_color_transfer_name(color_trc))
1379  color_trc = AVCOL_TRC_UNSPECIFIED;
1380  if (!av_color_space_name(color_matrix))
1381  color_matrix = AVCOL_SPC_UNSPECIFIED;
1382 
1384  st->codecpar->color_trc = color_trc;
1385  st->codecpar->color_space = color_matrix;
1386  av_log(c->fc, AV_LOG_TRACE, "\n");
1387 
1388  return 0;
1389 }
1390 
1392 {
1393  AVStream *st;
1394  unsigned mov_field_order;
1395  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1396 
1397  if (c->fc->nb_streams < 1) // will happen with jp2 files
1398  return 0;
1399  st = c->fc->streams[c->fc->nb_streams-1];
1400  if (atom.size < 2)
1401  return AVERROR_INVALIDDATA;
1402  mov_field_order = avio_rb16(pb);
1403  if ((mov_field_order & 0xFF00) == 0x0100)
1404  decoded_field_order = AV_FIELD_PROGRESSIVE;
1405  else if ((mov_field_order & 0xFF00) == 0x0200) {
1406  switch (mov_field_order & 0xFF) {
1407  case 0x01: decoded_field_order = AV_FIELD_TT;
1408  break;
1409  case 0x06: decoded_field_order = AV_FIELD_BB;
1410  break;
1411  case 0x09: decoded_field_order = AV_FIELD_TB;
1412  break;
1413  case 0x0E: decoded_field_order = AV_FIELD_BT;
1414  break;
1415  }
1416  }
1417  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1418  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1419  }
1420  st->codecpar->field_order = decoded_field_order;
1421 
1422  return 0;
1423 }
1424 
1426 {
1427  int err = 0;
1428  uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1429  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1430  return AVERROR_INVALIDDATA;
1431  if ((err = av_reallocp(&par->extradata, size)) < 0) {
1432  par->extradata_size = 0;
1433  return err;
1434  }
1436  return 0;
1437 }
1438 
1439 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1441  AVCodecParameters *par, uint8_t *buf)
1442 {
1443  int64_t result = atom.size;
1444  int err;
1445 
1446  AV_WB32(buf , atom.size + 8);
1447  AV_WL32(buf + 4, atom.type);
1448  err = ffio_read_size(pb, buf + 8, atom.size);
1449  if (err < 0) {
1450  par->extradata_size -= atom.size;
1451  return err;
1452  } else if (err < atom.size) {
1453  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1454  par->extradata_size -= atom.size - err;
1455  result = err;
1456  }
1457  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1458  return result;
1459 }
1460 
1461 /* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1463  enum AVCodecID codec_id)
1464 {
1465  AVStream *st;
1466  uint64_t original_size;
1467  int err;
1468 
1469  if (c->fc->nb_streams < 1) // will happen with jp2 files
1470  return 0;
1471  st = c->fc->streams[c->fc->nb_streams-1];
1472 
1473  if (st->codecpar->codec_id != codec_id)
1474  return 0; /* unexpected codec_id - don't mess with extradata */
1475 
1476  original_size = st->codecpar->extradata_size;
1477  err = mov_realloc_extradata(st->codecpar, atom);
1478  if (err)
1479  return err;
1480 
1481  err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1482  if (err < 0)
1483  return err;
1484  return 0; // Note: this is the original behavior to ignore truncation.
1485 }
1486 
1487 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1489 {
1490  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1491 }
1492 
1494 {
1495  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1496 }
1497 
1499 {
1500  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1501 }
1502 
1504 {
1505  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1506 }
1507 
1509 {
1510  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1511  if(ret == 0)
1512  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1513  return ret;
1514 }
1515 
1517 {
1518  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1519 
1520  if (!ret && c->fc->nb_streams >= 1) {
1521  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1522  if (par->extradata_size >= 40) {
1523  par->height = AV_RB16(&par->extradata[36]);
1524  par->width = AV_RB16(&par->extradata[38]);
1525  }
1526  }
1527  return ret;
1528 }
1529 
1531 {
1532  if (c->fc->nb_streams >= 1) {
1533  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1534  if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1535  par->codec_id == AV_CODEC_ID_H264 &&
1536  atom.size > 11) {
1537  int cid;
1538  avio_skip(pb, 10);
1539  cid = avio_rb16(pb);
1540  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1541  if (cid == 0xd4d || cid == 0xd4e)
1542  par->width = 1440;
1543  return 0;
1544  } else if ((par->codec_tag == MKTAG('A', 'V', 'd', '1') ||
1545  par->codec_tag == MKTAG('A', 'V', 'd', 'n')) &&
1546  atom.size >= 24) {
1547  int num, den;
1548  avio_skip(pb, 12);
1549  num = avio_rb32(pb);
1550  den = avio_rb32(pb);
1551  if (num <= 0 || den <= 0)
1552  return 0;
1553  switch (avio_rb32(pb)) {
1554  case 2:
1555  if (den >= INT_MAX / 2)
1556  return 0;
1557  den *= 2;
1558  case 1:
1559  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1560  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1561  default:
1562  return 0;
1563  }
1564  }
1565  }
1566 
1567  return mov_read_avid(c, pb, atom);
1568 }
1569 
1571 {
1572  int ret = 0;
1573  int length = 0;
1574  uint64_t original_size;
1575  if (c->fc->nb_streams >= 1) {
1576  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1577  if (par->codec_id == AV_CODEC_ID_H264)
1578  return 0;
1579  if (atom.size == 16) {
1580  original_size = par->extradata_size;
1581  ret = mov_realloc_extradata(par, atom);
1582  if (!ret) {
1583  length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1584  if (length == atom.size) {
1585  const uint8_t range_value = par->extradata[original_size + 19];
1586  switch (range_value) {
1587  case 1:
1589  break;
1590  case 2:
1592  break;
1593  default:
1594  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1595  break;
1596  }
1597  ff_dlog(c, "color_range: %d\n", par->color_range);
1598  } else {
1599  /* For some reason the whole atom was not added to the extradata */
1600  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1601  }
1602  } else {
1603  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1604  }
1605  } else {
1606  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1607  }
1608  }
1609 
1610  return ret;
1611 }
1612 
1614 {
1615  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1616 }
1617 
1619 {
1620  AVStream *st;
1621  int ret;
1622 
1623  if (c->fc->nb_streams < 1)
1624  return 0;
1625  st = c->fc->streams[c->fc->nb_streams-1];
1626 
1627  if ((uint64_t)atom.size > (1<<30))
1628  return AVERROR_INVALIDDATA;
1629 
1630  if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1633  // pass all frma atom to codec, needed at least for QDMC and QDM2
1634  av_freep(&st->codecpar->extradata);
1635  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1636  if (ret < 0)
1637  return ret;
1638  } else if (atom.size > 8) { /* to read frma, esds atoms */
1639  if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1640  uint64_t buffer;
1641  ret = ffio_ensure_seekback(pb, 8);
1642  if (ret < 0)
1643  return ret;
1644  buffer = avio_rb64(pb);
1645  atom.size -= 8;
1646  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1647  && buffer >> 32 <= atom.size
1648  && buffer >> 32 >= 8) {
1649  avio_skip(pb, -8);
1650  atom.size += 8;
1651  } else if (!st->codecpar->extradata_size) {
1652 #define ALAC_EXTRADATA_SIZE 36
1654  if (!st->codecpar->extradata)
1655  return AVERROR(ENOMEM);
1658  AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1659  AV_WB64(st->codecpar->extradata + 12, buffer);
1660  avio_read(pb, st->codecpar->extradata + 20, 16);
1661  avio_skip(pb, atom.size - 24);
1662  return 0;
1663  }
1664  }
1665  if ((ret = mov_read_default(c, pb, atom)) < 0)
1666  return ret;
1667  } else
1668  avio_skip(pb, atom.size);
1669  return 0;
1670 }
1671 
1672 /**
1673  * This function reads atom content and puts data in extradata without tag
1674  * nor size unlike mov_read_extradata.
1675  */
1677 {
1678  AVStream *st;
1679  int ret;
1680 
1681  if (c->fc->nb_streams < 1)
1682  return 0;
1683  st = c->fc->streams[c->fc->nb_streams-1];
1684 
1685  if ((uint64_t)atom.size > (1<<30))
1686  return AVERROR_INVALIDDATA;
1687 
1688  if (atom.size >= 10) {
1689  // Broken files created by legacy versions of libavformat will
1690  // wrap a whole fiel atom inside of a glbl atom.
1691  unsigned size = avio_rb32(pb);
1692  unsigned type = avio_rl32(pb);
1693  avio_seek(pb, -8, SEEK_CUR);
1694  if (type == MKTAG('f','i','e','l') && size == atom.size)
1695  return mov_read_default(c, pb, atom);
1696  }
1697  if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1698  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1699  return 0;
1700  }
1701  av_freep(&st->codecpar->extradata);
1702  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1703  if (ret < 0)
1704  return ret;
1705 
1706  return 0;
1707 }
1708 
1710 {
1711  AVStream *st;
1712  uint8_t profile_level;
1713  int ret;
1714 
1715  if (c->fc->nb_streams < 1)
1716  return 0;
1717  st = c->fc->streams[c->fc->nb_streams-1];
1718 
1719  if (atom.size >= (1<<28) || atom.size < 7)
1720  return AVERROR_INVALIDDATA;
1721 
1722  profile_level = avio_r8(pb);
1723  if ((profile_level & 0xf0) != 0xc0)
1724  return 0;
1725 
1726  avio_seek(pb, 6, SEEK_CUR);
1727  av_freep(&st->codecpar->extradata);
1728  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1729  if (ret < 0)
1730  return ret;
1731 
1732  return 0;
1733 }
1734 
1735 /**
1736  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1737  * but can have extradata appended at the end after the 40 bytes belonging
1738  * to the struct.
1739  */
1741 {
1742  AVStream *st;
1743  int ret;
1744 
1745  if (c->fc->nb_streams < 1)
1746  return 0;
1747  if (atom.size <= 40)
1748  return 0;
1749  st = c->fc->streams[c->fc->nb_streams-1];
1750 
1751  if ((uint64_t)atom.size > (1<<30))
1752  return AVERROR_INVALIDDATA;
1753 
1754  avio_skip(pb, 40);
1755  av_freep(&st->codecpar->extradata);
1756  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1757  if (ret < 0)
1758  return ret;
1759 
1760  return 0;
1761 }
1762 
1764 {
1765  AVStream *st;
1766  MOVStreamContext *sc;
1767  unsigned int i, entries;
1768 
1769  if (c->fc->nb_streams < 1)
1770  return 0;
1771  st = c->fc->streams[c->fc->nb_streams-1];
1772  sc = st->priv_data;
1773 
1774  avio_r8(pb); /* version */
1775  avio_rb24(pb); /* flags */
1776 
1777  entries = avio_rb32(pb);
1778 
1779  if (!entries)
1780  return 0;
1781 
1782  if (sc->chunk_offsets)
1783  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1784  av_free(sc->chunk_offsets);
1785  sc->chunk_count = 0;
1786  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1787  if (!sc->chunk_offsets)
1788  return AVERROR(ENOMEM);
1789  sc->chunk_count = entries;
1790 
1791  if (atom.type == MKTAG('s','t','c','o'))
1792  for (i = 0; i < entries && !pb->eof_reached; i++)
1793  sc->chunk_offsets[i] = avio_rb32(pb);
1794  else if (atom.type == MKTAG('c','o','6','4'))
1795  for (i = 0; i < entries && !pb->eof_reached; i++)
1796  sc->chunk_offsets[i] = avio_rb64(pb);
1797  else
1798  return AVERROR_INVALIDDATA;
1799 
1800  sc->chunk_count = i;
1801 
1802  if (pb->eof_reached)
1803  return AVERROR_EOF;
1804 
1805  return 0;
1806 }
1807 
1808 /**
1809  * Compute codec id for 'lpcm' tag.
1810  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1811  */
1813 {
1814  /* lpcm flags:
1815  * 0x1 = float
1816  * 0x2 = big-endian
1817  * 0x4 = signed
1818  */
1819  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1820 }
1821 
1822 static int mov_codec_id(AVStream *st, uint32_t format)
1823 {
1824  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1825 
1826  if (id <= 0 &&
1827  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1828  (format & 0xFFFF) == 'T' + ('S' << 8)))
1829  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1830 
1831  if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1833  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1834  /* skip old ASF MPEG-4 tag */
1835  format && format != MKTAG('m','p','4','s')) {
1837  if (id <= 0)
1838  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1839  if (id > 0)
1841  else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
1843  st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
1845  if (id > 0)
1847  }
1848  }
1849 
1850  st->codecpar->codec_tag = format;
1851 
1852  return id;
1853 }
1854 
1856  AVStream *st, MOVStreamContext *sc)
1857 {
1858  uint8_t codec_name[32] = { 0 };
1859  int64_t stsd_start;
1860  unsigned int len;
1861 
1862  /* The first 16 bytes of the video sample description are already
1863  * read in ff_mov_read_stsd_entries() */
1864  stsd_start = avio_tell(pb) - 16;
1865 
1866  avio_rb16(pb); /* version */
1867  avio_rb16(pb); /* revision level */
1868  avio_rb32(pb); /* vendor */
1869  avio_rb32(pb); /* temporal quality */
1870  avio_rb32(pb); /* spatial quality */
1871 
1872  st->codecpar->width = avio_rb16(pb); /* width */
1873  st->codecpar->height = avio_rb16(pb); /* height */
1874 
1875  avio_rb32(pb); /* horiz resolution */
1876  avio_rb32(pb); /* vert resolution */
1877  avio_rb32(pb); /* data size, always 0 */
1878  avio_rb16(pb); /* frames per samples */
1879 
1880  len = avio_r8(pb); /* codec name, pascal string */
1881  if (len > 31)
1882  len = 31;
1883  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1884  if (len < 31)
1885  avio_skip(pb, 31 - len);
1886 
1887  if (codec_name[0])
1888  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1889 
1890  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1891  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1892  st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1893  st->codecpar->width &= ~1;
1894  st->codecpar->height &= ~1;
1895  }
1896  /* Flash Media Server uses tag H.263 with Sorenson Spark */
1897  if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1898  !memcmp(codec_name, "Sorenson H263", 13))
1900 
1901  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1902 
1903  avio_seek(pb, stsd_start, SEEK_SET);
1904 
1905  if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
1906  st->codecpar->bits_per_coded_sample &= 0x1F;
1907  sc->has_palette = 1;
1908  }
1909 }
1910 
1912  AVStream *st, MOVStreamContext *sc)
1913 {
1914  int bits_per_sample, flags;
1915  uint16_t version = avio_rb16(pb);
1916  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1917 
1918  avio_rb16(pb); /* revision level */
1919  avio_rb32(pb); /* vendor */
1920 
1921  st->codecpar->channels = avio_rb16(pb); /* channel count */
1922  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1923  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1924 
1925  sc->audio_cid = avio_rb16(pb);
1926  avio_rb16(pb); /* packet size = 0 */
1927 
1928  st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1929 
1930  // Read QT version 1 fields. In version 0 these do not exist.
1931  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1932  if (!c->isom ||
1933  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1934 
1935  if (version == 1) {
1936  sc->samples_per_frame = avio_rb32(pb);
1937  avio_rb32(pb); /* bytes per packet */
1938  sc->bytes_per_frame = avio_rb32(pb);
1939  avio_rb32(pb); /* bytes per sample */
1940  } else if (version == 2) {
1941  avio_rb32(pb); /* sizeof struct only */
1943  st->codecpar->channels = avio_rb32(pb);
1944  avio_rb32(pb); /* always 0x7F000000 */
1946 
1947  flags = avio_rb32(pb); /* lpcm format specific flag */
1948  sc->bytes_per_frame = avio_rb32(pb);
1949  sc->samples_per_frame = avio_rb32(pb);
1950  if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1951  st->codecpar->codec_id =
1953  flags);
1954  }
1955  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1956  /* can't correctly handle variable sized packet as audio unit */
1957  switch (st->codecpar->codec_id) {
1958  case AV_CODEC_ID_MP2:
1959  case AV_CODEC_ID_MP3:
1961  break;
1962  }
1963  }
1964  }
1965 
1966  if (sc->format == 0) {
1967  if (st->codecpar->bits_per_coded_sample == 8)
1968  st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1969  else if (st->codecpar->bits_per_coded_sample == 16)
1970  st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1971  }
1972 
1973  switch (st->codecpar->codec_id) {
1974  case AV_CODEC_ID_PCM_S8:
1975  case AV_CODEC_ID_PCM_U8:
1976  if (st->codecpar->bits_per_coded_sample == 16)
1978  break;
1979  case AV_CODEC_ID_PCM_S16LE:
1980  case AV_CODEC_ID_PCM_S16BE:
1981  if (st->codecpar->bits_per_coded_sample == 8)
1983  else if (st->codecpar->bits_per_coded_sample == 24)
1984  st->codecpar->codec_id =
1987  else if (st->codecpar->bits_per_coded_sample == 32)
1988  st->codecpar->codec_id =
1991  break;
1992  /* set values for old format before stsd version 1 appeared */
1993  case AV_CODEC_ID_MACE3:
1994  sc->samples_per_frame = 6;
1995  sc->bytes_per_frame = 2 * st->codecpar->channels;
1996  break;
1997  case AV_CODEC_ID_MACE6:
1998  sc->samples_per_frame = 6;
1999  sc->bytes_per_frame = 1 * st->codecpar->channels;
2000  break;
2002  sc->samples_per_frame = 64;
2003  sc->bytes_per_frame = 34 * st->codecpar->channels;
2004  break;
2005  case AV_CODEC_ID_GSM:
2006  sc->samples_per_frame = 160;
2007  sc->bytes_per_frame = 33;
2008  break;
2009  default:
2010  break;
2011  }
2012 
2013  bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2014  if (bits_per_sample) {
2015  st->codecpar->bits_per_coded_sample = bits_per_sample;
2016  sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
2017  }
2018 }
2019 
2021  AVStream *st, MOVStreamContext *sc,
2022  int64_t size)
2023 {
2024  // ttxt stsd contains display flags, justification, background
2025  // color, fonts, and default styles, so fake an atom to read it
2026  MOVAtom fake_atom = { .size = size };
2027  // mp4s contains a regular esds atom
2028  if (st->codecpar->codec_tag != AV_RL32("mp4s"))
2029  mov_read_glbl(c, pb, fake_atom);
2030  st->codecpar->width = sc->width;
2031  st->codecpar->height = sc->height;
2032 }
2033 
2034 static uint32_t yuv_to_rgba(uint32_t ycbcr)
2035 {
2036  uint8_t r, g, b;
2037  int y, cb, cr;
2038 
2039  y = (ycbcr >> 16) & 0xFF;
2040  cr = (ycbcr >> 8) & 0xFF;
2041  cb = ycbcr & 0xFF;
2042 
2043  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
2044  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
2045  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
2046 
2047  return (r << 16) | (g << 8) | b;
2048 }
2049 
2051 {
2052  char buf[256] = {0};
2053  uint8_t *src = st->codecpar->extradata;
2054  int i;
2055 
2056  if (st->codecpar->extradata_size != 64)
2057  return 0;
2058 
2059  if (st->codecpar->width > 0 && st->codecpar->height > 0)
2060  snprintf(buf, sizeof(buf), "size: %dx%d\n",
2061  st->codecpar->width, st->codecpar->height);
2062  av_strlcat(buf, "palette: ", sizeof(buf));
2063 
2064  for (i = 0; i < 16; i++) {
2065  uint32_t yuv = AV_RB32(src + i * 4);
2066  uint32_t rgba = yuv_to_rgba(yuv);
2067 
2068  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2069  }
2070 
2071  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2072  return 0;
2073 
2074  av_freep(&st->codecpar->extradata);
2075  st->codecpar->extradata_size = 0;
2077  if (!st->codecpar->extradata)
2078  return AVERROR(ENOMEM);
2079  st->codecpar->extradata_size = strlen(buf);
2080  memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2081 
2082  return 0;
2083 }
2084 
2086  AVStream *st, MOVStreamContext *sc,
2087  int64_t size)
2088 {
2089  int ret;
2090 
2091  if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2092  if ((int)size != size)
2093  return AVERROR(ENOMEM);
2094 
2095  ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2096  if (ret < 0)
2097  return ret;
2098  if (size > 16) {
2099  MOVStreamContext *tmcd_ctx = st->priv_data;
2100  int val;
2101  val = AV_RB32(st->codecpar->extradata + 4);
2102  tmcd_ctx->tmcd_flags = val;
2103  st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2104  st->avg_frame_rate.den = 1;
2105 #if FF_API_LAVF_AVCTX
2107  st->codec->time_base = av_inv_q(st->avg_frame_rate);
2109 #endif
2110  /* adjust for per frame dur in counter mode */
2111  if (tmcd_ctx->tmcd_flags & 0x0008) {
2112  int timescale = AV_RB32(st->codecpar->extradata + 8);
2113  int framedur = AV_RB32(st->codecpar->extradata + 12);
2114  st->avg_frame_rate.num *= timescale;
2115  st->avg_frame_rate.den *= framedur;
2116 #if FF_API_LAVF_AVCTX
2118  st->codec->time_base.den *= timescale;
2119  st->codec->time_base.num *= framedur;
2121 #endif
2122  }
2123  if (size > 30) {
2124  uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2125  uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2126  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2127  uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2128  if (str_size > 0 && size >= (int)str_size + 26) {
2129  char *reel_name = av_malloc(str_size + 1);
2130  if (!reel_name)
2131  return AVERROR(ENOMEM);
2132  memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2133  reel_name[str_size] = 0; /* Add null terminator */
2134  /* don't add reel_name if emtpy string */
2135  if (*reel_name == 0) {
2136  av_free(reel_name);
2137  } else {
2138  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2139  }
2140  }
2141  }
2142  }
2143  }
2144  } else {
2145  /* other codec type, just skip (rtp, mp4s ...) */
2146  avio_skip(pb, size);
2147  }
2148  return 0;
2149 }
2150 
2152  AVStream *st, MOVStreamContext *sc)
2153 {
2154  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2155  !st->codecpar->sample_rate && sc->time_scale > 1)
2156  st->codecpar->sample_rate = sc->time_scale;
2157 
2158  /* special codec parameters handling */
2159  switch (st->codecpar->codec_id) {
2160 #if CONFIG_DV_DEMUXER
2161  case AV_CODEC_ID_DVAUDIO:
2163  if (!c->dv_fctx) {
2164  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2165  return AVERROR(ENOMEM);
2166  }
2168  if (!c->dv_demux) {
2169  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2170  return AVERROR(ENOMEM);
2171  }
2172  sc->dv_audio_container = 1;
2174  break;
2175 #endif
2176  /* no ifdef since parameters are always those */
2177  case AV_CODEC_ID_QCELP:
2178  st->codecpar->channels = 1;
2179  // force sample rate for qcelp when not stored in mov
2180  if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2181  st->codecpar->sample_rate = 8000;
2182  // FIXME: Why is the following needed for some files?
2183  sc->samples_per_frame = 160;
2184  if (!sc->bytes_per_frame)
2185  sc->bytes_per_frame = 35;
2186  break;
2187  case AV_CODEC_ID_AMR_NB:
2188  st->codecpar->channels = 1;
2189  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2190  st->codecpar->sample_rate = 8000;
2191  break;
2192  case AV_CODEC_ID_AMR_WB:
2193  st->codecpar->channels = 1;
2194  st->codecpar->sample_rate = 16000;
2195  break;
2196  case AV_CODEC_ID_MP2:
2197  case AV_CODEC_ID_MP3:
2198  /* force type after stsd for m1a hdlr */
2200  break;
2201  case AV_CODEC_ID_GSM:
2202  case AV_CODEC_ID_ADPCM_MS:
2204  case AV_CODEC_ID_ILBC:
2205  case AV_CODEC_ID_MACE3:
2206  case AV_CODEC_ID_MACE6:
2207  case AV_CODEC_ID_QDM2:
2209  break;
2210  case AV_CODEC_ID_ALAC:
2211  if (st->codecpar->extradata_size == 36) {
2212  st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2213  st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2214  }
2215  break;
2216  case AV_CODEC_ID_AC3:
2217  case AV_CODEC_ID_EAC3:
2219  case AV_CODEC_ID_VC1:
2220  case AV_CODEC_ID_VP9:
2222  break;
2223  default:
2224  break;
2225  }
2226  return 0;
2227 }
2228 
2230  int codec_tag, int format,
2231  int64_t size)
2232 {
2233  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2234 
2235  if (codec_tag &&
2236  (codec_tag != format &&
2237  // AVID 1:1 samples with differing data format and codec tag exist
2238  (codec_tag != AV_RL32("AV1x") || format != AV_RL32("AVup")) &&
2239  // prores is allowed to have differing data format and codec tag
2240  codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
2241  // so is dv (sigh)
2242  codec_tag != AV_RL32("dvpp") && codec_tag != AV_RL32("dvcp") &&
2243  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2244  : codec_tag != MKTAG('j','p','e','g')))) {
2245  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2246  * export it as a separate AVStream but this needs a few changes
2247  * in the MOV demuxer, patch welcome. */
2248 
2249  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2250  avio_skip(pb, size);
2251  return 1;
2252  }
2253 
2254  return 0;
2255 }
2256 
2258 {
2259  AVStream *st;
2260  MOVStreamContext *sc;
2261  int pseudo_stream_id;
2262 
2263  if (c->fc->nb_streams < 1)
2264  return 0;
2265  st = c->fc->streams[c->fc->nb_streams-1];
2266  sc = st->priv_data;
2267 
2268  for (pseudo_stream_id = 0;
2269  pseudo_stream_id < entries && !pb->eof_reached;
2270  pseudo_stream_id++) {
2271  //Parsing Sample description table
2272  enum AVCodecID id;
2273  int ret, dref_id = 1;
2274  MOVAtom a = { AV_RL32("stsd") };
2275  int64_t start_pos = avio_tell(pb);
2276  int64_t size = avio_rb32(pb); /* size */
2277  uint32_t format = avio_rl32(pb); /* data format */
2278 
2279  if (size >= 16) {
2280  avio_rb32(pb); /* reserved */
2281  avio_rb16(pb); /* reserved */
2282  dref_id = avio_rb16(pb);
2283  } else if (size <= 7) {
2284  av_log(c->fc, AV_LOG_ERROR,
2285  "invalid size %"PRId64" in stsd\n", size);
2286  return AVERROR_INVALIDDATA;
2287  }
2288 
2289  if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2290  size - (avio_tell(pb) - start_pos)))
2291  continue;
2292 
2293  sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2294  sc->dref_id= dref_id;
2295  sc->format = format;
2296 
2297  id = mov_codec_id(st, format);
2298 
2299  av_log(c->fc, AV_LOG_TRACE,
2300  "size=%"PRId64" 4CC=%s codec_type=%d\n", size,
2301  av_fourcc2str(format), st->codecpar->codec_type);
2302 
2304  st->codecpar->codec_id = id;
2305  mov_parse_stsd_video(c, pb, st, sc);
2306  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2307  st->codecpar->codec_id = id;
2308  mov_parse_stsd_audio(c, pb, st, sc);
2309  if (st->codecpar->sample_rate < 0) {
2310  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
2311  return AVERROR_INVALIDDATA;
2312  }
2313  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2314  st->codecpar->codec_id = id;
2315  mov_parse_stsd_subtitle(c, pb, st, sc,
2316  size - (avio_tell(pb) - start_pos));
2317  } else {
2318  ret = mov_parse_stsd_data(c, pb, st, sc,
2319  size - (avio_tell(pb) - start_pos));
2320  if (ret < 0)
2321  return ret;
2322  }
2323  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2324  a.size = size - (avio_tell(pb) - start_pos);
2325  if (a.size > 8) {
2326  if ((ret = mov_read_default(c, pb, a)) < 0)
2327  return ret;
2328  } else if (a.size > 0)
2329  avio_skip(pb, a.size);
2330 
2331  if (sc->extradata && st->codecpar->extradata) {
2332  int extra_size = st->codecpar->extradata_size;
2333 
2334  /* Move the current stream extradata to the stream context one. */
2335  sc->extradata_size[pseudo_stream_id] = extra_size;
2336  sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
2337  if (!sc->extradata[pseudo_stream_id])
2338  return AVERROR(ENOMEM);
2339  memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
2340  av_freep(&st->codecpar->extradata);
2341  st->codecpar->extradata_size = 0;
2342  }
2343  }
2344 
2345  if (pb->eof_reached)
2346  return AVERROR_EOF;
2347 
2348  return 0;
2349 }
2350 
2352 {
2353  AVStream *st;
2354  MOVStreamContext *sc;
2355  int ret, entries;
2356 
2357  if (c->fc->nb_streams < 1)
2358  return 0;
2359  st = c->fc->streams[c->fc->nb_streams - 1];
2360  sc = st->priv_data;
2361 
2362  avio_r8(pb); /* version */
2363  avio_rb24(pb); /* flags */
2364  entries = avio_rb32(pb);
2365 
2366  if (entries <= 0) {
2367  av_log(c->fc, AV_LOG_ERROR, "invalid STSD entries %d\n", entries);
2368  return AVERROR_INVALIDDATA;
2369  }
2370 
2371  if (sc->extradata) {
2372  av_log(c->fc, AV_LOG_ERROR, "Duplicate STSD\n");
2373  return AVERROR_INVALIDDATA;
2374  }
2375  /* Prepare space for hosting multiple extradata. */
2376  sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
2377  sc->extradata_size = av_mallocz_array(entries, sizeof(*sc->extradata_size));
2378  if (!sc->extradata_size || !sc->extradata) {
2379  ret = AVERROR(ENOMEM);
2380  goto fail;
2381  }
2382 
2383  ret = ff_mov_read_stsd_entries(c, pb, entries);
2384  if (ret < 0)
2385  return ret;
2386 
2387  sc->stsd_count = entries;
2388 
2389  /* Restore back the primary extradata. */
2390  av_freep(&st->codecpar->extradata);
2391  st->codecpar->extradata_size = sc->extradata_size[0];
2392  if (sc->extradata_size[0]) {
2394  if (!st->codecpar->extradata)
2395  return AVERROR(ENOMEM);
2396  memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
2397  }
2398 
2399  return mov_finalize_stsd_codec(c, pb, st, sc);
2400 fail:
2401  av_freep(&sc->extradata);
2402  av_freep(&sc->extradata_size);
2403  return ret;
2404 }
2405 
2407 {
2408  AVStream *st;
2409  MOVStreamContext *sc;
2410  unsigned int i, entries;
2411 
2412  if (c->fc->nb_streams < 1)
2413  return 0;
2414  st = c->fc->streams[c->fc->nb_streams-1];
2415  sc = st->priv_data;
2416 
2417  avio_r8(pb); /* version */
2418  avio_rb24(pb); /* flags */
2419 
2420  entries = avio_rb32(pb);
2421 
2422  av_log(c->fc, AV_LOG_TRACE, "track[%u].stsc.entries = %u\n", c->fc->nb_streams - 1, entries);
2423 
2424  if (!entries)
2425  return 0;
2426  if (sc->stsc_data)
2427  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2428  av_free(sc->stsc_data);
2429  sc->stsc_count = 0;
2430  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2431  if (!sc->stsc_data)
2432  return AVERROR(ENOMEM);
2433 
2434  for (i = 0; i < entries && !pb->eof_reached; i++) {
2435  sc->stsc_data[i].first = avio_rb32(pb);
2436  sc->stsc_data[i].count = avio_rb32(pb);
2437  sc->stsc_data[i].id = avio_rb32(pb);
2438  }
2439 
2440  sc->stsc_count = i;
2441 
2442  if (pb->eof_reached)
2443  return AVERROR_EOF;
2444 
2445  return 0;
2446 }
2447 
2448 #define mov_stsc_index_valid(index, count) ((index) < (count) - 1)
2449 
2450 /* Compute the samples value for the stsc entry at the given index. */
2451 static inline int mov_get_stsc_samples(MOVStreamContext *sc, int index)
2452 {
2453  int chunk_count;
2454 
2455  if (mov_stsc_index_valid(index, sc->stsc_count))
2456  chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2457  else
2458  chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2459 
2460  return sc->stsc_data[index].count * chunk_count;
2461 }
2462 
2464 {
2465  AVStream *st;
2466  MOVStreamContext *sc;
2467  unsigned i, entries;
2468 
2469  if (c->fc->nb_streams < 1)
2470  return 0;
2471  st = c->fc->streams[c->fc->nb_streams-1];
2472  sc = st->priv_data;
2473 
2474  avio_rb32(pb); // version + flags
2475 
2476  entries = avio_rb32(pb);
2477  if (sc->stps_data)
2478  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2479  av_free(sc->stps_data);
2480  sc->stps_count = 0;
2481  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2482  if (!sc->stps_data)
2483  return AVERROR(ENOMEM);
2484 
2485  for (i = 0; i < entries && !pb->eof_reached; i++) {
2486  sc->stps_data[i] = avio_rb32(pb);
2487  }
2488 
2489  sc->stps_count = i;
2490 
2491  if (pb->eof_reached)
2492  return AVERROR_EOF;
2493 
2494  return 0;
2495 }
2496 
2498 {
2499  AVStream *st;
2500  MOVStreamContext *sc;
2501  unsigned int i, entries;
2502 
2503  if (c->fc->nb_streams < 1)
2504  return 0;
2505  st = c->fc->streams[c->fc->nb_streams-1];
2506  sc = st->priv_data;
2507 
2508  avio_r8(pb); /* version */
2509  avio_rb24(pb); /* flags */
2510 
2511  entries = avio_rb32(pb);
2512 
2513  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %u\n", entries);
2514 
2515  if (!entries)
2516  {
2517  sc->keyframe_absent = 1;
2518  if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2520  return 0;
2521  }
2522  if (sc->keyframes)
2523  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2524  if (entries >= UINT_MAX / sizeof(int))
2525  return AVERROR_INVALIDDATA;
2526  av_freep(&sc->keyframes);
2527  sc->keyframe_count = 0;
2528  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2529  if (!sc->keyframes)
2530  return AVERROR(ENOMEM);
2531 
2532  for (i = 0; i < entries && !pb->eof_reached; i++) {
2533  sc->keyframes[i] = avio_rb32(pb);
2534  }
2535 
2536  sc->keyframe_count = i;
2537 
2538  if (pb->eof_reached)
2539  return AVERROR_EOF;
2540 
2541  return 0;
2542 }
2543 
2545 {
2546  AVStream *st;
2547  MOVStreamContext *sc;
2548  unsigned int i, entries, sample_size, field_size, num_bytes;
2549  GetBitContext gb;
2550  unsigned char* buf;
2551  int ret;
2552 
2553  if (c->fc->nb_streams < 1)
2554  return 0;
2555  st = c->fc->streams[c->fc->nb_streams-1];
2556  sc = st->priv_data;
2557 
2558  avio_r8(pb); /* version */
2559  avio_rb24(pb); /* flags */
2560 
2561  if (atom.type == MKTAG('s','t','s','z')) {
2562  sample_size = avio_rb32(pb);
2563  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2564  sc->sample_size = sample_size;
2565  sc->stsz_sample_size = sample_size;
2566  field_size = 32;
2567  } else {
2568  sample_size = 0;
2569  avio_rb24(pb); /* reserved */
2570  field_size = avio_r8(pb);
2571  }
2572  entries = avio_rb32(pb);
2573 
2574  av_log(c->fc, AV_LOG_TRACE, "sample_size = %u sample_count = %u\n", sc->sample_size, entries);
2575 
2576  sc->sample_count = entries;
2577  if (sample_size)
2578  return 0;
2579 
2580  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2581  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %u\n", field_size);
2582  return AVERROR_INVALIDDATA;
2583  }
2584 
2585  if (!entries)
2586  return 0;
2587  if (entries >= (UINT_MAX - 4) / field_size)
2588  return AVERROR_INVALIDDATA;
2589  if (sc->sample_sizes)
2590  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2591  av_free(sc->sample_sizes);
2592  sc->sample_count = 0;
2593  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2594  if (!sc->sample_sizes)
2595  return AVERROR(ENOMEM);
2596 
2597  num_bytes = (entries*field_size+4)>>3;
2598 
2599  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2600  if (!buf) {
2601  av_freep(&sc->sample_sizes);
2602  return AVERROR(ENOMEM);
2603  }
2604 
2605  ret = ffio_read_size(pb, buf, num_bytes);
2606  if (ret < 0) {
2607  av_freep(&sc->sample_sizes);
2608  av_free(buf);
2609  return ret;
2610  }
2611 
2612  init_get_bits(&gb, buf, 8*num_bytes);
2613 
2614  for (i = 0; i < entries && !pb->eof_reached; i++) {
2615  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2616  sc->data_size += sc->sample_sizes[i];
2617  }
2618 
2619  sc->sample_count = i;
2620 
2621  av_free(buf);
2622 
2623  if (pb->eof_reached)
2624  return AVERROR_EOF;
2625 
2626  return 0;
2627 }
2628 
2630 {
2631  AVStream *st;
2632  MOVStreamContext *sc;
2633  unsigned int i, entries;
2634  int64_t duration=0;
2635  int64_t total_sample_count=0;
2636 
2637  if (c->fc->nb_streams < 1)
2638  return 0;
2639  st = c->fc->streams[c->fc->nb_streams-1];
2640  sc = st->priv_data;
2641 
2642  avio_r8(pb); /* version */
2643  avio_rb24(pb); /* flags */
2644  entries = avio_rb32(pb);
2645 
2646  av_log(c->fc, AV_LOG_TRACE, "track[%u].stts.entries = %u\n",
2647  c->fc->nb_streams-1, entries);
2648 
2649  if (sc->stts_data)
2650  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2651  av_free(sc->stts_data);
2652  sc->stts_count = 0;
2653  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2654  if (!sc->stts_data)
2655  return AVERROR(ENOMEM);
2656 
2657  for (i = 0; i < entries && !pb->eof_reached; i++) {
2658  int sample_duration;
2659  int sample_count;
2660 
2661  sample_count=avio_rb32(pb);
2662  sample_duration = avio_rb32(pb);
2663 
2664  if (sample_count < 0) {
2665  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2666  return AVERROR_INVALIDDATA;
2667  }
2668  sc->stts_data[i].count= sample_count;
2669  sc->stts_data[i].duration= sample_duration;
2670 
2671  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2672  sample_count, sample_duration);
2673 
2674  if ( i+1 == entries
2675  && i
2676  && sample_count == 1
2677  && total_sample_count > 100
2678  && sample_duration/10 > duration / total_sample_count)
2679  sample_duration = duration / total_sample_count;
2680  duration+=(int64_t)sample_duration*sample_count;
2681  total_sample_count+=sample_count;
2682  }
2683 
2684  sc->stts_count = i;
2685 
2686  sc->duration_for_fps += duration;
2687  sc->nb_frames_for_fps += total_sample_count;
2688 
2689  if (pb->eof_reached)
2690  return AVERROR_EOF;
2691 
2692  st->nb_frames= total_sample_count;
2693  if (duration)
2694  st->duration= duration;
2695  sc->track_end = duration;
2696  return 0;
2697 }
2698 
2700 {
2701  if (duration < 0) {
2702  if (duration == INT_MIN) {
2703  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2704  duration++;
2705  }
2706  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2707  }
2708 }
2709 
2711 {
2712  AVStream *st;
2713  MOVStreamContext *sc;
2714  unsigned int i, entries, ctts_count = 0;
2715 
2716  if (c->fc->nb_streams < 1)
2717  return 0;
2718  st = c->fc->streams[c->fc->nb_streams-1];
2719  sc = st->priv_data;
2720 
2721  avio_r8(pb); /* version */
2722  avio_rb24(pb); /* flags */
2723  entries = avio_rb32(pb);
2724 
2725  av_log(c->fc, AV_LOG_TRACE, "track[%u].ctts.entries = %u\n", c->fc->nb_streams - 1, entries);
2726 
2727  if (!entries)
2728  return 0;
2729  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2730  return AVERROR_INVALIDDATA;
2731  av_freep(&sc->ctts_data);
2732  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2733  if (!sc->ctts_data)
2734  return AVERROR(ENOMEM);
2735 
2736  for (i = 0; i < entries && !pb->eof_reached; i++) {
2737  int count =avio_rb32(pb);
2738  int duration =avio_rb32(pb);
2739 
2740  if (count <= 0) {
2741  av_log(c->fc, AV_LOG_TRACE,
2742  "ignoring CTTS entry with count=%d duration=%d\n",
2743  count, duration);
2744  continue;
2745  }
2746 
2747  sc->ctts_data[ctts_count].count = count;
2748  sc->ctts_data[ctts_count].duration = duration;
2749  ctts_count++;
2750 
2751  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2752  count, duration);
2753 
2754  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2755  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2756  av_freep(&sc->ctts_data);
2757  sc->ctts_count = 0;
2758  return 0;
2759  }
2760 
2761  if (i+2<entries)
2762  mov_update_dts_shift(sc, duration);
2763  }
2764 
2765  sc->ctts_count = ctts_count;
2766 
2767  if (pb->eof_reached)
2768  return AVERROR_EOF;
2769 
2770  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2771 
2772  return 0;
2773 }
2774 
2776 {
2777  AVStream *st;
2778  MOVStreamContext *sc;
2779  unsigned int i, entries;
2780  uint8_t version;
2781  uint32_t grouping_type;
2782 
2783  if (c->fc->nb_streams < 1)
2784  return 0;
2785  st = c->fc->streams[c->fc->nb_streams-1];
2786  sc = st->priv_data;
2787 
2788  version = avio_r8(pb); /* version */
2789  avio_rb24(pb); /* flags */
2790  grouping_type = avio_rl32(pb);
2791  if (grouping_type != MKTAG( 'r','a','p',' '))
2792  return 0; /* only support 'rap ' grouping */
2793  if (version == 1)
2794  avio_rb32(pb); /* grouping_type_parameter */
2795 
2796  entries = avio_rb32(pb);
2797  if (!entries)
2798  return 0;
2799  if (sc->rap_group)
2800  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2801  av_free(sc->rap_group);
2802  sc->rap_group_count = 0;
2803  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2804  if (!sc->rap_group)
2805  return AVERROR(ENOMEM);
2806 
2807  for (i = 0; i < entries && !pb->eof_reached; i++) {
2808  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2809  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2810  }
2811 
2812  sc->rap_group_count = i;
2813 
2814  return pb->eof_reached ? AVERROR_EOF : 0;
2815 }
2816 
2817 /**
2818  * Get ith edit list entry (media time, duration).
2819  */
2821  const MOVStreamContext *msc,
2822  unsigned int edit_list_index,
2823  int64_t *edit_list_media_time,
2824  int64_t *edit_list_duration,
2825  int64_t global_timescale)
2826 {
2827  if (edit_list_index == msc->elst_count) {
2828  return 0;
2829  }
2830  *edit_list_media_time = msc->elst_data[edit_list_index].time;
2831  *edit_list_duration = msc->elst_data[edit_list_index].duration;
2832 
2833  /* duration is in global timescale units;convert to msc timescale */
2834  if (global_timescale == 0) {
2835  avpriv_request_sample(mov->fc, "Support for mvhd.timescale = 0 with editlists");
2836  return 0;
2837  }
2838  *edit_list_duration = av_rescale(*edit_list_duration, msc->time_scale,
2839  global_timescale);
2840  return 1;
2841 }
2842 
2843 /**
2844  * Find the closest previous frame to the timestamp, in e_old index
2845  * entries. Searching for just any frame / just key frames can be controlled by
2846  * last argument 'flag'.
2847  * Returns the index of the entry in st->index_entries if successful,
2848  * else returns -1.
2849  */
2851  AVIndexEntry *e_old,
2852  int nb_old,
2853  int64_t timestamp,
2854  int flag)
2855 {
2856  AVIndexEntry *e_keep = st->index_entries;
2857  int nb_keep = st->nb_index_entries;
2858  int64_t found = -1;
2859  int64_t i = 0;
2860 
2861  st->index_entries = e_old;
2862  st->nb_index_entries = nb_old;
2863  found = av_index_search_timestamp(st, timestamp, flag | AVSEEK_FLAG_BACKWARD);
2864 
2865  // Keep going backwards in the index entries until the timestamp is the same.
2866  if (found >= 0) {
2867  for (i = found; i > 0 && e_old[i].timestamp == e_old[i - 1].timestamp;
2868  i--) {
2869  if ((flag & AVSEEK_FLAG_ANY) ||
2870  (e_old[i - 1].flags & AVINDEX_KEYFRAME)) {
2871  found = i - 1;
2872  }
2873  }
2874  }
2875 
2876  /* restore AVStream state*/
2877  st->index_entries = e_keep;
2878  st->nb_index_entries = nb_keep;
2879  return found;
2880 }
2881 
2882 /**
2883  * Add index entry with the given values, to the end of st->index_entries.
2884  * Returns the new size st->index_entries if successful, else returns -1.
2885  *
2886  * This function is similar to ff_add_index_entry in libavformat/utils.c
2887  * except that here we are always unconditionally adding an index entry to
2888  * the end, instead of searching the entries list and skipping the add if
2889  * there is an existing entry with the same timestamp.
2890  * This is needed because the mov_fix_index calls this func with the same
2891  * unincremented timestamp for successive discarded frames.
2892  */
2893 static int64_t add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2894  int size, int distance, int flags)
2895 {
2896  AVIndexEntry *entries, *ie;
2897  int64_t index = -1;
2898  const size_t min_size_needed = (st->nb_index_entries + 1) * sizeof(AVIndexEntry);
2899 
2900  // Double the allocation each time, to lower memory fragmentation.
2901  // Another difference from ff_add_index_entry function.
2902  const size_t requested_size =
2903  min_size_needed > st->index_entries_allocated_size ?
2904  FFMAX(min_size_needed, 2 * st->index_entries_allocated_size) :
2905  min_size_needed;
2906 
2907  if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
2908  return -1;
2909 
2910  entries = av_fast_realloc(st->index_entries,
2912  requested_size);
2913  if(!entries)
2914  return -1;
2915 
2916  st->index_entries= entries;
2917 
2918  index= st->nb_index_entries++;
2919  ie= &entries[index];
2920 
2921  ie->pos = pos;
2922  ie->timestamp = timestamp;
2923  ie->min_distance= distance;
2924  ie->size= size;
2925  ie->flags = flags;
2926  return index;
2927 }
2928 
2929 /**
2930  * Rewrite timestamps of index entries in the range [end_index - frame_duration_buffer_size, end_index)
2931  * by subtracting end_ts successively by the amounts given in frame_duration_buffer.
2932  */
2933 static void fix_index_entry_timestamps(AVStream* st, int end_index, int64_t end_ts,
2934  int64_t* frame_duration_buffer,
2935  int frame_duration_buffer_size) {
2936  int i = 0;
2937  av_assert0(end_index >= 0 && end_index <= st->nb_index_entries);
2938  for (i = 0; i < frame_duration_buffer_size; i++) {
2939  end_ts -= frame_duration_buffer[frame_duration_buffer_size - 1 - i];
2940  st->index_entries[end_index - 1 - i].timestamp = end_ts;
2941  }
2942 }
2943 
2944 /**
2945  * Append a new ctts entry to ctts_data.
2946  * Returns the new ctts_count if successful, else returns -1.
2947  */
2948 static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
2949  int count, int duration)
2950 {
2951  MOVStts *ctts_buf_new;
2952  const size_t min_size_needed = (*ctts_count + 1) * sizeof(MOVStts);
2953  const size_t requested_size =
2954  min_size_needed > *allocated_size ?
2955  FFMAX(min_size_needed, 2 * (*allocated_size)) :
2956  min_size_needed;
2957 
2958  if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts))
2959  return -1;
2960 
2961  ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);
2962 
2963  if(!ctts_buf_new)
2964  return -1;
2965 
2966  *ctts_data = ctts_buf_new;
2967 
2968  ctts_buf_new[*ctts_count].count = count;
2969  ctts_buf_new[*ctts_count].duration = duration;
2970 
2971  *ctts_count = (*ctts_count) + 1;
2972  return *ctts_count;
2973 }
2974 
2976 {
2977  sc->current_sample++;
2978  sc->current_index++;
2979  if (sc->index_ranges &&
2980  sc->current_index >= sc->current_index_range->end &&
2981  sc->current_index_range->end) {
2982  sc->current_index_range++;
2984  }
2985 }
2986 
2988 {
2989  sc->current_sample--;
2990  sc->current_index--;
2991  if (sc->index_ranges &&
2993  sc->current_index_range > sc->index_ranges) {
2994  sc->current_index_range--;
2995  sc->current_index = sc->current_index_range->end - 1;
2996  }
2997 }
2998 
2999 static void mov_current_sample_set(MOVStreamContext *sc, int current_sample)
3000 {
3001  int64_t range_size;
3002 
3003  sc->current_sample = current_sample;
3004  sc->current_index = current_sample;
3005  if (!sc->index_ranges) {
3006  return;
3007  }
3008 
3009  for (sc->current_index_range = sc->index_ranges;
3010  sc->current_index_range->end;
3011  sc->current_index_range++) {
3012  range_size = sc->current_index_range->end - sc->current_index_range->start;
3013  if (range_size > current_sample) {
3014  sc->current_index = sc->current_index_range->start + current_sample;
3015  break;
3016  }
3017  current_sample -= range_size;
3018  }
3019 }
3020 
3021 /**
3022  * Fix st->index_entries, so that it contains only the entries (and the entries
3023  * which are needed to decode them) that fall in the edit list time ranges.
3024  * Also fixes the timestamps of the index entries to match the timeline
3025  * specified the edit lists.
3026  */
3027 static void mov_fix_index(MOVContext *mov, AVStream *st)
3028 {
3029  MOVStreamContext *msc = st->priv_data;
3030  AVIndexEntry *e_old = st->index_entries;
3031  int nb_old = st->nb_index_entries;
3032  const AVIndexEntry *e_old_end = e_old + nb_old;
3033  const AVIndexEntry *current = NULL;
3034  MOVStts *ctts_data_old = msc->ctts_data;
3035  int64_t ctts_index_old = 0;
3036  int64_t ctts_sample_old = 0;
3037  int64_t ctts_count_old = msc->ctts_count;
3038  int64_t edit_list_media_time = 0;
3039  int64_t edit_list_duration = 0;
3040  int64_t frame_duration = 0;
3041  int64_t edit_list_dts_counter = 0;
3042  int64_t edit_list_dts_entry_end = 0;
3043  int64_t edit_list_start_ctts_sample = 0;
3044  int64_t curr_cts;
3045  int64_t curr_ctts = 0;
3046  int64_t min_corrected_pts = -1;
3047  int64_t empty_edits_sum_duration = 0;
3048  int64_t edit_list_index = 0;
3049  int64_t index;
3050  int64_t index_ctts_count;
3051  int flags;
3052  unsigned int ctts_allocated_size = 0;
3053  int64_t start_dts = 0;
3054  int64_t edit_list_media_time_dts = 0;
3055  int64_t edit_list_start_encountered = 0;
3056  int64_t search_timestamp = 0;
3057  int64_t* frame_duration_buffer = NULL;
3058  int num_discarded_begin = 0;
3059  int first_non_zero_audio_edit = -1;
3060  int packet_skip_samples = 0;
3061  MOVIndexRange *current_index_range;
3062  int i;
3063 
3064  if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
3065  return;
3066  }
3067 
3068  // allocate the index ranges array
3069  msc->index_ranges = av_malloc((msc->elst_count + 1) * sizeof(msc->index_ranges[0]));
3070  if (!msc->index_ranges) {
3071  av_log(mov->fc, AV_LOG_ERROR, "Cannot allocate index ranges buffer\n");
3072  return;
3073  }
3074  msc->current_index_range = msc->index_ranges;
3075  current_index_range = msc->index_ranges - 1;
3076 
3077  // Clean AVStream from traces of old index
3078  st->index_entries = NULL;
3080  st->nb_index_entries = 0;
3081 
3082  // Clean ctts fields of MOVStreamContext
3083  msc->ctts_data = NULL;
3084  msc->ctts_count = 0;
3085  msc->ctts_index = 0;
3086  msc->ctts_sample = 0;
3087 
3088  // If the dts_shift is positive (in case of negative ctts values in mov),
3089  // then negate the DTS by dts_shift
3090  if (msc->dts_shift > 0) {
3091  edit_list_dts_entry_end -= msc->dts_shift;
3092  av_log(mov->fc, AV_LOG_DEBUG, "Shifting DTS by %d because of negative CTTS.\n", msc->dts_shift);
3093  }
3094 
3095  start_dts = edit_list_dts_entry_end;
3096 
3097  while (get_edit_list_entry(mov, msc, edit_list_index, &edit_list_media_time,
3098  &edit_list_duration, mov->time_scale)) {
3099  av_log(mov->fc, AV_LOG_DEBUG, "Processing st: %d, edit list %"PRId64" - media time: %"PRId64", duration: %"PRId64"\n",
3100  st->index, edit_list_index, edit_list_media_time, edit_list_duration);
3101  edit_list_index++;
3102  edit_list_dts_counter = edit_list_dts_entry_end;
3103  edit_list_dts_entry_end += edit_list_duration;
3104  num_discarded_begin = 0;
3105  if (edit_list_media_time == -1) {
3106  empty_edits_sum_duration += edit_list_duration;
3107  continue;
3108  }
3109 
3110  // If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
3111  // according to the edit list below.
3112  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3113  if (first_non_zero_audio_edit < 0) {
3114  first_non_zero_audio_edit = 1;
3115  } else {
3116  first_non_zero_audio_edit = 0;
3117  }
3118 
3119  if (first_non_zero_audio_edit > 0)
3120  st->skip_samples = msc->start_pad = 0;
3121  }
3122 
3123  //find closest previous key frame
3124  edit_list_media_time_dts = edit_list_media_time;
3125  if (msc->dts_shift > 0) {
3126  edit_list_media_time_dts -= msc->dts_shift;
3127  }
3128 
3129  // While reordering frame index according to edit list we must handle properly
3130  // the scenario when edit list entry starts from none key frame.
3131  // We find closest previous key frame and preserve it and consequent frames in index.
3132  // All frames which are outside edit list entry time boundaries will be dropped after decoding.
3133  search_timestamp = edit_list_media_time_dts;
3134  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3135  // Audio decoders like AAC need need a decoder delay samples previous to the current sample,
3136  // to correctly decode this frame. Hence for audio we seek to a frame 1 sec. before the
3137  // edit_list_media_time to cover the decoder delay.
3138  search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
3139  }
3140 
3141  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, 0);
3142  if (index == -1) {
3143  av_log(mov->fc, AV_LOG_WARNING,
3144  "st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
3145  st->index, edit_list_index, search_timestamp);
3146  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, AVSEEK_FLAG_ANY);
3147 
3148  if (index == -1) {
3149  av_log(mov->fc, AV_LOG_WARNING,
3150  "st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n"
3151  "Rounding edit list media time to zero.\n",
3152  st->index, edit_list_index, search_timestamp);
3153  index = 0;
3154  edit_list_media_time = 0;
3155  }
3156  }
3157  current = e_old + index;
3158 
3159  ctts_index_old = 0;
3160  ctts_sample_old = 0;
3161 
3162  // set ctts_index properly for the found key frame
3163  for (index_ctts_count = 0; index_ctts_count < index; index_ctts_count++) {
3164  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3165  ctts_sample_old++;
3166  if (ctts_data_old[ctts_index_old].count == ctts_sample_old) {
3167  ctts_index_old++;
3168  ctts_sample_old = 0;
3169  }
3170  }
3171  }
3172 
3173  edit_list_start_ctts_sample = ctts_sample_old;
3174 
3175  // Iterate over index and arrange it according to edit list
3176  edit_list_start_encountered = 0;
3177  for (; current < e_old_end; current++, index++) {
3178  // check if frame outside edit list mark it for discard
3179  frame_duration = (current + 1 < e_old_end) ?
3180  ((current + 1)->timestamp - current->timestamp) : edit_list_duration;
3181 
3182  flags = current->flags;
3183 
3184  // frames (pts) before or after edit list
3185  curr_cts = current->timestamp + msc->dts_shift;
3186  curr_ctts = 0;
3187 
3188  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3189  curr_ctts = ctts_data_old[ctts_index_old].duration;
3190  av_log(mov->fc, AV_LOG_DEBUG, "stts: %"PRId64" ctts: %"PRId64", ctts_index: %"PRId64", ctts_count: %"PRId64"\n",
3191  curr_cts, curr_ctts, ctts_index_old, ctts_count_old);
3192  curr_cts += curr_ctts;
3193  ctts_sample_old++;
3194  if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
3195  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3196  &ctts_allocated_size,
3197  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3198  ctts_data_old[ctts_index_old].duration) == -1) {
3199  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3200  ctts_index_old,
3201  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3202  ctts_data_old[ctts_index_old].duration);
3203  break;
3204  }
3205  ctts_index_old++;
3206  ctts_sample_old = 0;
3207  edit_list_start_ctts_sample = 0;
3208  }
3209  }
3210 
3211  if (curr_cts < edit_list_media_time || curr_cts >= (edit_list_duration + edit_list_media_time)) {
3213  curr_cts < edit_list_media_time && curr_cts + frame_duration > edit_list_media_time &&
3214  first_non_zero_audio_edit > 0) {
3215  packet_skip_samples = edit_list_media_time - curr_cts;
3216  st->skip_samples += packet_skip_samples;
3217 
3218  // Shift the index entry timestamp by packet_skip_samples to be correct.
3219  edit_list_dts_counter -= packet_skip_samples;
3220  if (edit_list_start_encountered == 0) {
3221  edit_list_start_encountered = 1;
3222  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3223  // discarded packets.
3224  if (frame_duration_buffer) {
3225  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3226  frame_duration_buffer, num_discarded_begin);
3227  av_freep(&frame_duration_buffer);
3228  }
3229  }
3230 
3231  av_log(mov->fc, AV_LOG_DEBUG, "skip %d audio samples from curr_cts: %"PRId64"\n", packet_skip_samples, curr_cts);
3232  } else {
3233  flags |= AVINDEX_DISCARD_FRAME;
3234  av_log(mov->fc, AV_LOG_DEBUG, "drop a frame at curr_cts: %"PRId64" @ %"PRId64"\n", curr_cts, index);
3235 
3236  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && edit_list_start_encountered == 0) {
3237  num_discarded_begin++;
3238  frame_duration_buffer = av_realloc(frame_duration_buffer,
3239  num_discarded_begin * sizeof(int64_t));
3240  if (!frame_duration_buffer) {
3241  av_log(mov->fc, AV_LOG_ERROR, "Cannot reallocate frame duration buffer\n");
3242  break;
3243  }
3244  frame_duration_buffer[num_discarded_begin - 1] = frame_duration;
3245 
3246  // Increment skip_samples for the first non-zero audio edit list
3247  if (first_non_zero_audio_edit > 0 && st->codecpar->codec_id != AV_CODEC_ID_VORBIS) {
3248  st->skip_samples += frame_duration;
3249  msc->start_pad = st->skip_samples;
3250  }
3251  }
3252  }
3253  } else {
3254  if (min_corrected_pts < 0) {
3255  min_corrected_pts = edit_list_dts_counter + curr_ctts + msc->dts_shift;
3256  } else {
3257  min_corrected_pts = FFMIN(min_corrected_pts, edit_list_dts_counter + curr_ctts + msc->dts_shift);
3258  }
3259  if (edit_list_start_encountered == 0) {
3260  edit_list_start_encountered = 1;
3261  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3262  // discarded packets.
3263  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && frame_duration_buffer) {
3264  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3265  frame_duration_buffer, num_discarded_begin);
3266  av_freep(&frame_duration_buffer);
3267  }
3268  }
3269  }
3270 
3271  if (add_index_entry(st, current->pos, edit_list_dts_counter, current->size,
3272  current->min_distance, flags) == -1) {
3273  av_log(mov->fc, AV_LOG_ERROR, "Cannot add index entry\n");
3274  break;
3275  }
3276 
3277  // Update the index ranges array
3278  if (current_index_range < msc->index_ranges || index != current_index_range->end) {
3279  current_index_range++;
3280  current_index_range->start = index;
3281  }
3282  current_index_range->end = index + 1;
3283 
3284  // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list.
3285  if (edit_list_start_encountered > 0) {
3286  edit_list_dts_counter = edit_list_dts_counter + frame_duration;
3287  }
3288 
3289  // Break when found first key frame after edit entry completion
3290  if (((curr_cts + frame_duration) >= (edit_list_duration + edit_list_media_time)) &&
3291  ((flags & AVINDEX_KEYFRAME) || ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)))) {
3292 
3293  if (ctts_data_old && ctts_sample_old != 0) {
3294  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3295  &ctts_allocated_size,
3296  ctts_sample_old - edit_list_start_ctts_sample,
3297  ctts_data_old[ctts_index_old].duration) == -1) {
3298  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3299  ctts_index_old, ctts_sample_old - edit_list_start_ctts_sample,
3300  ctts_data_old[ctts_index_old].duration);
3301  break;
3302  }
3303  }
3304  break;
3305  }
3306  }
3307  }
3308  // If there are empty edits, then min_corrected_pts might be positive intentionally. So we subtract the
3309  // sum duration of emtpy edits here.
3310  min_corrected_pts -= empty_edits_sum_duration;
3311 
3312  // If the minimum pts turns out to be greater than zero after fixing the index, then we subtract the
3313  // dts by that amount to make the first pts zero.
3314  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && min_corrected_pts > 0) {
3315  av_log(mov->fc, AV_LOG_DEBUG, "Offset DTS by %"PRId64" to make first pts zero.\n", min_corrected_pts);
3316  for (i = 0; i < st->nb_index_entries; ++i) {
3317  st->index_entries[i].timestamp -= min_corrected_pts;
3318  }
3319  }
3320 
3321  // Update av stream length
3322  st->duration = edit_list_dts_entry_end - start_dts;
3323 
3324  // Free the old index and the old CTTS structures
3325  av_free(e_old);
3326  av_free(ctts_data_old);
3327 
3328  // Null terminate the index ranges array
3329  current_index_range++;
3330  current_index_range->start = 0;
3331  current_index_range->end = 0;
3332  msc->current_index = msc->index_ranges[0].start;
3333 }
3334 
3335 static void mov_build_index(MOVContext *mov, AVStream *st)
3336 {
3337  MOVStreamContext *sc = st->priv_data;
3338  int64_t current_offset;
3339  int64_t current_dts = 0;
3340  unsigned int stts_index = 0;
3341  unsigned int stsc_index = 0;
3342  unsigned int stss_index = 0;
3343  unsigned int stps_index = 0;
3344  unsigned int i, j;
3345  uint64_t stream_size = 0;
3346 
3347  if (sc->elst_count) {
3348  int i, edit_start_index = 0, multiple_edits = 0;
3349  int64_t empty_duration = 0; // empty duration of the first edit list entry
3350  int64_t start_time = 0; // start time of the media
3351 
3352  for (i = 0; i < sc->elst_count; i++) {
3353  const MOVElst *e = &sc->elst_data[i];
3354  if (i == 0 && e->time == -1) {
3355  /* if empty, the first entry is the start time of the stream
3356  * relative to the presentation itself */
3357  empty_duration = e->duration;
3358  edit_start_index = 1;
3359  } else if (i == edit_start_index && e->time >= 0) {
3360  start_time = e->time;
3361  } else {
3362  multiple_edits = 1;
3363  }
3364  }
3365 
3366  if (multiple_edits && !mov->advanced_editlist)
3367  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
3368  "Use -advanced_editlist to correctly decode otherwise "
3369  "a/v desync might occur\n");
3370 
3371  /* adjust first dts according to edit list */
3372  if ((empty_duration || start_time) && mov->time_scale > 0) {
3373  if (empty_duration)
3374  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
3375  sc->time_offset = start_time - empty_duration;
3376  if (!mov->advanced_editlist)
3377  current_dts = -sc->time_offset;
3378  }
3379 
3380  if (!multiple_edits && !mov->advanced_editlist &&
3381  st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
3382  sc->start_pad = start_time;
3383  }
3384 
3385  /* only use old uncompressed audio chunk demuxing when stts specifies it */
3386  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3387  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
3388  unsigned int current_sample = 0;
3389  unsigned int stts_sample = 0;
3390  unsigned int sample_size;
3391  unsigned int distance = 0;
3392  unsigned int rap_group_index = 0;
3393  unsigned int rap_group_sample = 0;
3394  int64_t last_dts = 0;
3395  int64_t dts_correction = 0;
3396  int rap_group_present = sc->rap_group_count && sc->rap_group;
3397  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
3398 
3399  current_dts -= sc->dts_shift;
3400  last_dts = current_dts;
3401 
3402  if (!sc->sample_count || st->nb_index_entries)
3403  return;
3404  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3405  return;
3407  st->nb_index_entries + sc->sample_count,
3408  sizeof(*st->index_entries)) < 0) {
3409  st->nb_index_entries = 0;
3410  return;
3411  }
3413 
3414  for (i = 0; i < sc->chunk_count; i++) {
3415  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
3416  current_offset = sc->chunk_offsets[i];
3417  while (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3418  i + 1 == sc->stsc_data[stsc_index + 1].first)
3419  stsc_index++;
3420 
3421  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
3422  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
3423  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
3424  sc->stsz_sample_size = sc->sample_size;
3425  }
3426  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
3427  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
3428  sc->stsz_sample_size = sc->sample_size;
3429  }
3430 
3431  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
3432  int keyframe = 0;
3433  if (current_sample >= sc->sample_count) {
3434  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
3435  return;
3436  }
3437 
3438  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
3439  keyframe = 1;
3440  if (stss_index + 1 < sc->keyframe_count)
3441  stss_index++;
3442  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
3443  keyframe = 1;
3444  if (stps_index + 1 < sc->stps_count)
3445  stps_index++;
3446  }
3447  if (rap_group_present && rap_group_index < sc->rap_group_count) {
3448  if (sc->rap_group[rap_group_index].index > 0)
3449  keyframe = 1;
3450  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
3451  rap_group_sample = 0;
3452  rap_group_index++;
3453  }
3454  }
3455  if (sc->keyframe_absent
3456  && !sc->stps_count
3457  && !rap_group_present
3458  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
3459  keyframe = 1;
3460  if (keyframe)
3461  distance = 0;
3462  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
3463  if (sc->pseudo_stream_id == -1 ||
3464  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
3465  AVIndexEntry *e;
3466  if (sample_size > 0x3FFFFFFF) {
3467  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
3468  return;
3469  }
3470  e = &st->index_entries[st->nb_index_entries++];
3471  e->pos = current_offset;
3472  e->timestamp = current_dts;
3473  e->size = sample_size;
3474  e->min_distance = distance;
3475  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
3476  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
3477  "size %u, distance %u, keyframe %d\n", st->index, current_sample,
3478  current_offset, current_dts, sample_size, distance, keyframe);
3479  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
3480  ff_rfps_add_frame(mov->fc, st, current_dts);
3481  }
3482 
3483  current_offset += sample_size;
3484  stream_size += sample_size;
3485 
3486  /* A negative sample duration is invalid based on the spec,
3487  * but some samples need it to correct the DTS. */
3488  if (sc->stts_data[stts_index].duration < 0) {
3489  av_log(mov->fc, AV_LOG_WARNING,
3490  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
3491  sc->stts_data[stts_index].duration, stts_index,
3492  st->index);
3493  dts_correction += sc->stts_data[stts_index].duration - 1;
3494  sc->stts_data[stts_index].duration = 1;
3495  }
3496  current_dts += sc->stts_data[stts_index].duration;
3497  if (!dts_correction || current_dts + dts_correction > last_dts) {
3498  current_dts += dts_correction;
3499  dts_correction = 0;
3500  } else {
3501  /* Avoid creating non-monotonous DTS */
3502  dts_correction += current_dts - last_dts - 1;
3503  current_dts = last_dts + 1;
3504  }
3505  last_dts = current_dts;
3506  distance++;
3507  stts_sample++;
3508  current_sample++;
3509  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
3510  stts_sample = 0;
3511  stts_index++;
3512  }
3513  }
3514  }
3515  if (st->duration > 0)
3516  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
3517  } else {
3518  unsigned chunk_samples, total = 0;
3519 
3520  // compute total chunk count
3521  for (i = 0; i < sc->stsc_count; i++) {
3522  unsigned count, chunk_count;
3523 
3524  chunk_samples = sc->stsc_data[i].count;
3525  if (i != sc->stsc_count - 1 &&
3526  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
3527  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
3528  return;
3529  }
3530 
3531  if (sc->samples_per_frame >= 160) { // gsm
3532  count = chunk_samples / sc->samples_per_frame;
3533  } else if (sc->samples_per_frame > 1) {
3534  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
3535  count = (chunk_samples+samples-1) / samples;
3536  } else {
3537  count = (chunk_samples+1023) / 1024;
3538  }
3539 
3540  if (mov_stsc_index_valid(i, sc->stsc_count))
3541  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
3542  else
3543  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
3544  total += chunk_count * count;
3545  }
3546 
3547  av_log(mov->fc, AV_LOG_TRACE, "chunk count %u\n", total);
3548  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3549  return;
3551  st->nb_index_entries + total,
3552  sizeof(*st->index_entries)) < 0) {
3553  st->nb_index_entries = 0;
3554  return;
3555  }
3556  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
3557 
3558  // populate index
3559  for (i = 0; i < sc->chunk_count; i++) {
3560  current_offset = sc->chunk_offsets[i];
3561  if (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3562  i + 1 == sc->stsc_data[stsc_index + 1].first)
3563  stsc_index++;
3564  chunk_samples = sc->stsc_data[stsc_index].count;
3565 
3566  while (chunk_samples > 0) {
3567  AVIndexEntry *e;
3568  unsigned size, samples;
3569 
3570  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3572  "Zero bytes per frame, but %d samples per frame",
3573  sc->samples_per_frame);
3574  return;
3575  }
3576 
3577  if (sc->samples_per_frame >= 160) { // gsm
3578  samples = sc->samples_per_frame;
3579  size = sc->bytes_per_frame;
3580  } else {
3581  if (sc->samples_per_frame > 1) {
3582  samples = FFMIN((1024 / sc->samples_per_frame)*
3583  sc->samples_per_frame, chunk_samples);
3584  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3585  } else {
3586  samples = FFMIN(1024, chunk_samples);
3587  size = samples * sc->sample_size;
3588  }
3589  }
3590 
3591  if (st->nb_index_entries >= total) {
3592  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %u\n", total);
3593  return;
3594  }
3595  if (size > 0x3FFFFFFF) {
3596  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
3597  return;
3598  }
3599  e = &st->index_entries[st->nb_index_entries++];
3600  e->pos = current_offset;
3601  e->timestamp = current_dts;
3602  e->size = size;
3603  e->min_distance = 0;
3604  e->flags = AVINDEX_KEYFRAME;
3605  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %u, offset %"PRIx64", dts %"PRId64", "
3606  "size %u, duration %u\n", st->index, i, current_offset, current_dts,
3607  size, samples);
3608 
3609  current_offset += size;
3610  current_dts += samples;
3611  chunk_samples -= samples;
3612  }
3613  }
3614  }
3615 
3616  if (!mov->ignore_editlist && mov->advanced_editlist) {
3617  // Fix index according to edit lists.
3618  mov_fix_index(mov, st);
3619  }
3620 }
3621 
3622 static int test_same_origin(const char *src, const char *ref) {
3623  char src_proto[64];
3624  char ref_proto[64];
3625  char src_auth[256];
3626  char ref_auth[256];
3627  char src_host[256];
3628  char ref_host[256];
3629  int src_port=-1;
3630  int ref_port=-1;
3631 
3632  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
3633  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
3634 
3635  if (strlen(src) == 0) {
3636  return -1;
3637  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
3638  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
3639  strlen(src_host) + 1 >= sizeof(src_host) ||
3640  strlen(ref_host) + 1 >= sizeof(ref_host)) {
3641  return 0;
3642  } else if (strcmp(src_proto, ref_proto) ||
3643  strcmp(src_auth, ref_auth) ||
3644  strcmp(src_host, ref_host) ||
3645  src_port != ref_port) {
3646  return 0;
3647  } else
3648  return 1;
3649 }
3650 
3651 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
3652 {
3653  /* try relative path, we do not try the absolute because it can leak information about our
3654  system to an attacker */
3655  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
3656  char filename[1025];
3657  const char *src_path;
3658  int i, l;
3659 
3660  /* find a source dir */
3661  src_path = strrchr(src, '/');
3662  if (src_path)
3663  src_path++;
3664  else
3665  src_path = src;
3666 
3667  /* find a next level down to target */
3668  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
3669  if (ref->path[l] == '/') {
3670  if (i == ref->nlvl_to - 1)
3671  break;
3672  else
3673  i++;
3674  }
3675 
3676  /* compose filename if next level down to target was found */
3677  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3678  memcpy(filename, src, src_path - src);
3679  filename[src_path - src] = 0;
3680 
3681  for (i = 1; i < ref->nlvl_from; i++)
3682  av_strlcat(filename, "../", sizeof(filename));
3683 
3684  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3685  if (!c->use_absolute_path) {
3686  int same_origin = test_same_origin(src, filename);
3687 
3688  if (!same_origin) {
3689  av_log(c->fc, AV_LOG_ERROR,
3690  "Reference with mismatching origin, %s not tried for security reasons, "
3691  "set demuxer option use_absolute_path to allow it anyway\n",
3692  ref->path);
3693  return AVERROR(ENOENT);
3694  }
3695 
3696  if(strstr(ref->path + l + 1, "..") ||
3697  strstr(ref->path + l + 1, ":") ||
3698  (ref->nlvl_from > 1 && same_origin < 0) ||
3699  (filename[0] == '/' && src_path == src))
3700  return AVERROR(ENOENT);
3701  }
3702 
3703  if (strlen(filename) + 1 == sizeof(filename))
3704  return AVERROR(ENOENT);
3705  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3706  return 0;
3707  }
3708  } else if (c->use_absolute_path) {
3709  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3710  "this is a possible security issue\n");
3711  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3712  return 0;
3713  } else {
3714  av_log(c->fc, AV_LOG_ERROR,
3715  "Absolute path %s not tried for security reasons, "
3716  "set demuxer option use_absolute_path to allow absolute paths\n",
3717  ref->path);
3718  }
3719 
3720  return AVERROR(ENOENT);
3721 }
3722 
3724 {
3725  if (sc->time_scale <= 0) {
3726  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3727  sc->time_scale = c->time_scale;
3728  if (sc->time_scale <= 0)
3729  sc->time_scale = 1;
3730  }
3731 }
3732 
3734 {
3735  AVStream *st;
3736  MOVStreamContext *sc;
3737  int ret;
3738 
3739  st = avformat_new_stream(c->fc, NULL);
3740  if (!st) return AVERROR(ENOMEM);
3741  st->id = c->fc->nb_streams;
3742  sc = av_mallocz(sizeof(MOVStreamContext));
3743  if (!sc) return AVERROR(ENOMEM);
3744 
3745  st->priv_data = sc;
3747  sc->ffindex = st->index;
3748  c->trak_index = st->index;
3749 
3750  if ((ret = mov_read_default(c, pb, atom)) < 0)
3751  return ret;
3752 
3753  c->trak_index = -1;
3754 
3755  /* sanity checks */
3756  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3757  (!sc->sample_size && !sc->sample_count))) {
3758  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3759  st->index);
3760  return 0;
3761  }
3762 
3763  fix_timescale(c, sc);
3764 
3765  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3766 
3767  mov_build_index(c, st);
3768 
3769  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3770  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3771  if (c->enable_drefs) {
3772  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3773  av_log(c->fc, AV_LOG_ERROR,
3774  "stream %d, error opening alias: path='%s', dir='%s', "
3775  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3776  st->index, dref->path, dref->dir, dref->filename,
3777  dref->volume, dref->nlvl_from, dref->nlvl_to);
3778  } else {
3779  av_log(c->fc, AV_LOG_WARNING,
3780  "Skipped opening external track: "
3781  "stream %d, alias: path='%s', dir='%s', "
3782  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3783  "Set enable_drefs to allow this.\n",
3784  st->index, dref->path, dref->dir, dref->filename,
3785  dref->volume, dref->nlvl_from, dref->nlvl_to);
3786  }
3787  } else {
3788  sc->pb = c->fc->pb;
3789  sc->pb_is_copied = 1;
3790  }
3791 
3792  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3793  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3794  sc->height && sc->width &&
3795  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3796  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3797  ((double)st->codecpar->width * sc->height), INT_MAX);
3798  }
3799 
3800 #if FF_API_R_FRAME_RATE
3801  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3803  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3804 #endif
3805  }
3806 
3807  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3808  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3809  TAG_IS_AVCI(st->codecpar->codec_tag)) {
3810  ret = ff_generate_avci_extradata(st);
3811  if (ret < 0)
3812  return ret;
3813  }
3814 
3815  switch (st->codecpar->codec_id) {
3816 #if CONFIG_H261_DECODER
3817  case AV_CODEC_ID_H261:
3818 #endif
3819 #if CONFIG_H263_DECODER
3820  case AV_CODEC_ID_H263:
3821 #endif
3822 #if CONFIG_MPEG4_DECODER
3823  case AV_CODEC_ID_MPEG4:
3824 #endif
3825  st->codecpar->width = 0; /* let decoder init width/height */
3826  st->codecpar->height= 0;
3827  break;
3828  }
3829 
3830  // If the duration of the mp3 packets is not constant, then they could need a parser
3831  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3832  && sc->stts_count > 3
3833  && sc->stts_count*10 > st->nb_frames
3834  && sc->time_scale == st->codecpar->sample_rate) {
3836  }
3837  /* Do not need those anymore. */
3838  av_freep(&sc->chunk_offsets);
3839  av_freep(&sc->sample_sizes);
3840  av_freep(&sc->keyframes);
3841  av_freep(&sc->stts_data);
3842  av_freep(&sc->stps_data);
3843  av_freep(&sc->elst_data);
3844  av_freep(&sc->rap_group);
3845 
3846  return 0;
3847 }
3848 
3850 {
3851  int ret;
3852  c->itunes_metadata = 1;
3853  ret = mov_read_default(c, pb, atom);
3854  c->itunes_metadata = 0;
3855  return ret;
3856 }
3857 
3859 {
3860  uint32_t count;
3861  uint32_t i;
3862 
3863  if (atom.size < 8)
3864  return 0;
3865 
3866  avio_skip(pb, 4);
3867  count = avio_rb32(pb);
3868  if (count > UINT_MAX / sizeof(*c->meta_keys) - 1) {
3869  av_log(c->fc, AV_LOG_ERROR,
3870  "The 'keys' atom with the invalid key count: %"PRIu32"\n", count);
3871  return AVERROR_INVALIDDATA;
3872  }
3873 
3874  c->meta_keys_count = count + 1;
3875  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3876  if (!c->meta_keys)
3877  return AVERROR(ENOMEM);
3878 
3879  for (i = 1; i <= count; ++i) {
3880  uint32_t key_size = avio_rb32(pb);
3881  uint32_t type = avio_rl32(pb);
3882  if (key_size < 8) {
3883  av_log(c->fc, AV_LOG_ERROR,
3884  "The key# %"PRIu32" in meta has invalid size:"
3885  "%"PRIu32"\n", i, key_size);
3886  return AVERROR_INVALIDDATA;
3887  }
3888  key_size -= 8;
3889  if (type != MKTAG('m','d','t','a')) {
3890  avio_skip(pb, key_size);
3891  }
3892  c->meta_keys[i] = av_mallocz(key_size + 1);
3893  if (!c->meta_keys[i])
3894  return AVERROR(ENOMEM);
3895  avio_read(pb, c->meta_keys[i], key_size);
3896  }
3897 
3898  return 0;
3899 }
3900 
3902 {
3903  int64_t end = avio_tell(pb) + atom.size;
3904  uint8_t *key = NULL, *val = NULL, *mean = NULL;
3905  int i;
3906  int ret = 0;
3907  AVStream *st;
3908  MOVStreamContext *sc;
3909 
3910  if (c->fc->nb_streams < 1)
3911  return 0;
3912  st = c->fc->streams[c->fc->nb_streams-1];
3913  sc = st->priv_data;
3914 
3915  for (i = 0; i < 3; i++) {
3916  uint8_t **p;
3917  uint32_t len, tag;
3918 
3919  if (end - avio_tell(pb) <= 12)
3920  break;
3921 
3922  len = avio_rb32(pb);
3923  tag = avio_rl32(pb);
3924  avio_skip(pb, 4); // flags
3925 
3926  if (len < 12 || len - 12 > end - avio_tell(pb))
3927  break;
3928  len -= 12;
3929 
3930  if (tag == MKTAG('m', 'e', 'a', 'n'))
3931  p = &mean;
3932  else if (tag == MKTAG('n', 'a', 'm', 'e'))
3933  p = &key;
3934  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3935  avio_skip(pb, 4);
3936  len -= 4;
3937  p = &val;
3938  } else
3939  break;
3940 
3941  *p = av_malloc(len + 1);
3942  if (!*p)
3943  break;
3944  ret = ffio_read_size(pb, *p, len);
3945  if (ret < 0) {
3946  av_freep(p);
3947  break;
3948  }
3949  (*p)[len] = 0;
3950  }
3951 
3952  if (mean && key && val) {
3953  if (strcmp(key, "iTunSMPB") == 0) {
3954  int priming, remainder, samples;
3955  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3956  if(priming>0 && priming<16384)
3957  sc->start_pad = priming;
3958  }
3959  }
3960  if (strcmp(key, "cdec") != 0) {
3961  av_dict_set(&c->fc->metadata, key, val,
3963  key = val = NULL;
3964  }
3965  } else {
3966  av_log(c->fc, AV_LOG_VERBOSE,
3967  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3968  }
3969 
3970  avio_seek(pb, end, SEEK_SET);
3971  av_freep(&key);
3972  av_freep(&val);
3973  av_freep(&mean);
3974  return ret;
3975 }
3976 
3978 {
3979  while (atom.size > 8) {
3980  uint32_t tag = avio_rl32(pb);
3981  atom.size -= 4;
3982  if (tag == MKTAG('h','d','l','r')) {
3983  avio_seek(pb, -8, SEEK_CUR);
3984  atom.size += 8;
3985  return mov_read_default(c, pb, atom);
3986  }
3987  }
3988  return 0;
3989 }
3990 
3991 // return 1 when matrix is identity, 0 otherwise
3992 #define IS_MATRIX_IDENT(matrix) \
3993  ( (matrix)[0][0] == (1 << 16) && \
3994  (matrix)[1][1] == (1 << 16) && \
3995  (matrix)[2][2] == (1 << 30) && \
3996  !(matrix)[0][1] && !(matrix)[0][2] && \
3997  !(matrix)[1][0] && !(matrix)[1][2] && \
3998  !(matrix)[2][0] && !(matrix)[2][1])
3999 
4001 {
4002  int i, j, e;
4003  int width;
4004  int height;
4005  int display_matrix[3][3];
4006  int res_display_matrix[3][3] = { { 0 } };
4007  AVStream *st;
4008  MOVStreamContext *sc;
4009  int version;
4010  int flags;
4011 
4012  if (c->fc->nb_streams < 1)
4013  return 0;
4014  st = c->fc->streams[c->fc->nb_streams-1];
4015  sc = st->priv_data;
4016 
4017  version = avio_r8(pb);
4018  flags = avio_rb24(pb);
4020 
4021  if (version == 1) {
4022  avio_rb64(pb);
4023  avio_rb64(pb);
4024  } else {
4025  avio_rb32(pb); /* creation time */
4026  avio_rb32(pb); /* modification time */
4027  }
4028  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
4029  avio_rb32(pb); /* reserved */
4030 
4031  /* highlevel (considering edits) duration in movie timebase */
4032  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
4033  avio_rb32(pb); /* reserved */
4034  avio_rb32(pb); /* reserved */
4035 
4036  avio_rb16(pb); /* layer */
4037  avio_rb16(pb); /* alternate group */
4038  avio_rb16(pb); /* volume */
4039  avio_rb16(pb); /* reserved */
4040 
4041  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
4042  // they're kept in fixed point format through all calculations
4043  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
4044  // side data, but the scale factor is not needed to calculate aspect ratio
4045  for (i = 0; i < 3; i++) {
4046  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
4047  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
4048  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
4049  }
4050 
4051  width = avio_rb32(pb); // 16.16 fixed point track width
4052  height = avio_rb32(pb); // 16.16 fixed point track height
4053  sc->width = width >> 16;
4054  sc->height = height >> 16;
4055 
4056  // apply the moov display matrix (after the tkhd one)
4057  for (i = 0; i < 3; i++) {
4058  const int sh[3] = { 16, 16, 30 };
4059  for (j = 0; j < 3; j++) {
4060  for (e = 0; e < 3; e++) {
4061  res_display_matrix[i][j] +=
4062  ((int64_t) display_matrix[i][e] *
4063  c->movie_display_matrix[e][j]) >> sh[e];
4064  }
4065  }
4066  }
4067 
4068  // save the matrix when it is not the default identity
4069  if (!IS_MATRIX_IDENT(res_display_matrix)) {
4070  double rotate;
4071 
4072  av_freep(&sc->display_matrix);
4073  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
4074  if (!sc->display_matrix)
4075  return AVERROR(ENOMEM);
4076 
4077  for (i = 0; i < 3; i++)
4078  for (j = 0; j < 3; j++)
4079  sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
4080 
4083  if (!isnan(rotate)) {
4084  char rotate_buf[64];
4085  rotate = -rotate;
4086  if (rotate < 0) // for backward compatibility
4087  rotate += 360;
4088  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
4089  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
4090  }
4091 #endif
4092  }
4093 
4094  // transform the display width/height according to the matrix
4095  // to keep the same scale, use [width height 1<<16]
4096  if (width && height && sc->display_matrix) {
4097  double disp_transform[2];
4098 
4099  for (i = 0; i < 2; i++)
4100  disp_transform[i] = hypot(sc->display_matrix[0 + i],
4101  sc->display_matrix[3 + i]);
4102 
4103  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
4104  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
4105  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
4107  disp_transform[0] / disp_transform[1],
4108  INT_MAX);
4109  }
4110  return 0;
4111 }
4112 
4114 {
4115  MOVFragment *frag = &c->fragment;
4116  MOVTrackExt *trex = NULL;
4118  int flags, track_id, i, found = 0;
4119 
4120  avio_r8(pb); /* version */
4121  flags = avio_rb24(pb);
4122 
4123  track_id = avio_rb32(pb);
4124  if (!track_id)
4125  return AVERROR_INVALIDDATA;
4126  frag->track_id = track_id;
4127  for (i = 0; i < c->trex_count; i++)
4128  if (c->trex_data[i].track_id == frag->track_id) {
4129  trex = &c->trex_data[i];
4130  break;
4131  }
4132  if (!trex) {
4133  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
4134  return AVERROR_INVALIDDATA;
4135  }
4136 
4139  frag->moof_offset : frag->implicit_offset;
4140  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
4141 
4142  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
4143  avio_rb32(pb) : trex->duration;
4144  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
4145  avio_rb32(pb) : trex->size;
4146  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
4147  avio_rb32(pb) : trex->flags;
4148  frag->time = AV_NOPTS_VALUE;
4149  for (i = 0; i < c->fragment_index_count; i++) {
4150  int j;
4151  MOVFragmentIndex* candidate = c->fragment_index_data[i];
4152  if (candidate->track_id == frag->track_id) {
4153  av_log(c->fc, AV_LOG_DEBUG,
4154  "found fragment index for track %u\n", frag->track_id);
4155  index = candidate;
4156  for (j = index->current_item; j < index->item_count; j++) {
4157  if (frag->implicit_offset == index->items[j].moof_offset) {
4158  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
4159  "for track %u and moof_offset %"PRId64"\n",
4160  frag->track_id, index->items[j].moof_offset);
4161  frag->time = index->items[j].time;
4162  index->current_item = j + 1;
4163  found = 1;
4164  break;
4165  }
4166  }
4167  if (found)
4168  break;
4169  }
4170  }
4171  if (index && !found) {
4172  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
4173  "it doesn't have an (in-order) entry for moof_offset "
4174  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
4175  }
4176  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
4177  return 0;
4178 }
4179 
4181 {
4182  unsigned i, num;
4183  void *new_tracks;
4184 
4185  num = atom.size / 4;
4186  if (!(new_tracks = av_malloc_array(num, sizeof(int))))
4187  return AVERROR(ENOMEM);
4188 
4189  av_free(c->chapter_tracks);
4190  c->chapter_tracks = new_tracks;
4191  c->nb_chapter_tracks = num;
4192 
4193  for (i = 0; i < num && !pb->eof_reached; i++)
4194  c->chapter_tracks[i] = avio_rb32(pb);
4195 
4196  return 0;
4197 }
4198 
4200 {
4201  MOVTrackExt *trex;
4202  int err;
4203 
4204  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
4205  return AVERROR_INVALIDDATA;
4206  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
4207  sizeof(*c->trex_data))) < 0) {
4208  c->trex_count = 0;
4209  return err;
4210  }
4211 
4212  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
4213 
4214  trex = &c->trex_data[c->trex_count++];
4215  avio_r8(pb); /* version */
4216  avio_rb24(pb); /* flags */
4217  trex->track_id = avio_rb32(pb);
4218  trex->stsd_id = avio_rb32(pb);
4219  trex->duration = avio_rb32(pb);
4220  trex->size = avio_rb32(pb);
4221  trex->flags = avio_rb32(pb);
4222  return 0;
4223 }
4224 
4226 {
4227  MOVFragment *frag = &c->fragment;
4228  AVStream *st = NULL;
4229  MOVStreamContext *sc;
4230  int version, i;
4231 
4232  for (i = 0; i < c->fc->nb_streams; i++) {
4233  if (c->fc->streams[i]->id == frag->track_id) {
4234  st = c->fc->streams[i];
4235  break;
4236  }
4237  }
4238  if (!st) {
4239  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4240  return AVERROR_INVALIDDATA;
4241  }
4242  sc = st->priv_data;
4243  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
4244  return 0;
4245  version = avio_r8(pb);
4246  avio_rb24(pb); /* flags */
4247  if (version) {
4248  sc->track_end = avio_rb64(pb);
4249  } else {
4250  sc->track_end = avio_rb32(pb);
4251  }
4252  return 0;
4253 }
4254 
4256 {
4257  MOVFragment *frag = &c->fragment;
4258  AVStream *st = NULL;
4259  MOVStreamContext *sc;
4260  MOVStts *ctts_data;
4261  uint64_t offset;
4262  int64_t dts;
4263  int data_offset = 0;
4264  unsigned entries, first_sample_flags = frag->flags;
4265  int flags, distance, i, err, old_nb_index_entries;
4266 
4267  for (i = 0; i < c->fc->nb_streams; i++) {
4268  if (c->fc->streams[i]->id == frag->track_id) {
4269  st = c->fc->streams[i];
4270  break;
4271  }
4272  }
4273  if (!st) {
4274  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4275  return AVERROR_INVALIDDATA;
4276  }
4277  sc = st->priv_data;
4278  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4279  return 0;
4280  avio_r8(pb); /* version */
4281  flags = avio_rb24(pb);
4282  entries = avio_rb32(pb);
4283  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %u\n", flags, entries);
4284 
4285  /* Always assume the presence of composition time offsets.
4286  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
4287  * 1) in the initial movie, there are no samples.
4288  * 2) in the first movie fragment, there is only one sample without composition time offset.
4289  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
4290  if (!sc->ctts_count && sc->sample_count)
4291  {
4292  /* Complement ctts table if moov atom doesn't have ctts atom. */
4293  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
4294  if (!ctts_data)
4295  return AVERROR(ENOMEM);
4296  sc->ctts_data = ctts_data;
4297  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
4298  sc->ctts_data[sc->ctts_count].duration = 0;
4299  sc->ctts_count++;
4300  }
4301  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
4302  return AVERROR_INVALIDDATA;
4303  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
4304  sizeof(*sc->ctts_data))) < 0) {
4305  sc->ctts_count = 0;
4306  return err;
4307  }
4308  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
4309  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
4310  dts = sc->track_end - sc->time_offset;
4311  offset = frag->base_data_offset + data_offset;
4312  distance = 0;
4313  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
4314  for (i = 0; i < entries && !pb->eof_reached; i++) {
4315  unsigned sample_size = frag->size;
4316  int sample_flags = i ? frag->flags : first_sample_flags;
4317  unsigned sample_duration = frag->duration;
4318  int keyframe = 0;
4319 
4320  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
4321  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
4322  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
4323  sc->ctts_data[sc->ctts_count].count = 1;
4324  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
4325  avio_rb32(pb) : 0;
4327  if (frag->time != AV_NOPTS_VALUE) {
4328  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
4329  int64_t pts = frag->time;
4330  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4331  " sc->dts_shift %d ctts.duration %d"
4332  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
4333  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
4334  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
4335  dts = pts - sc->dts_shift;
4336  if (flags & MOV_TRUN_SAMPLE_CTS) {
4337  dts -= sc->ctts_data[sc->ctts_count].duration;
4338  } else {
4339  dts -= sc->time_offset;
4340  }
4341  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
4342  } else {
4343  dts = frag->time - sc->time_offset;
4344  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4345  ", using it for dts\n", dts);
4346  }
4347  frag->time = AV_NOPTS_VALUE;
4348  }
4349  sc->ctts_count++;
4351  keyframe = 1;
4352  else
4353  keyframe =
4354  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
4356  if (keyframe)
4357  distance = 0;
4358  old_nb_index_entries = st->nb_index_entries;
4359  err = av_add_index_entry(st, offset, dts, sample_size, distance,
4360  keyframe ? AVINDEX_KEYFRAME : 0);
4361  if (err < 0) {
4362  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
4363  } else if (err <= sc->current_sample && err + 1 != st->nb_index_entries &&
4364  st->nb_index_entries != old_nb_index_entries) {
4365  // if we inserted a new item before the current sample, move the
4366  // counter ahead so it is still pointing to the same sample.
4367  sc->current_sample++;
4368  }
4369  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
4370  "size %u, distance %d, keyframe %d\n", st->index, err,
4371  offset, dts, sample_size, distance, keyframe);
4372  distance++;
4373  dts += sample_duration;
4374  offset += sample_size;
4375  sc->data_size += sample_size;
4376  sc->duration_for_fps += sample_duration;
4377  sc->nb_frames_for_fps ++;
4378  }
4379 
4380  if (pb->eof_reached)
4381  return AVERROR_EOF;
4382 
4383  frag->implicit_offset = offset;
4384 
4385  sc->track_end = dts + sc->time_offset;
4386  if (st->duration < sc->track_end)
4387  st->duration = sc->track_end;
4388 
4389  return 0;
4390 }
4391 
4393 {
4394  int64_t offset = avio_tell(pb) + atom.size, pts;
4395  uint8_t version;
4396  unsigned i, track_id;
4397  AVStream *st = NULL;
4398  AVStream *ref_st = NULL;
4399  MOVStreamContext *sc, *ref_sc = NULL;
4402  AVRational timescale;
4403 
4404  version = avio_r8(pb);
4405  if (version > 1) {
4406  avpriv_request_sample(c->fc, "sidx version %u", version);
4407  return 0;
4408  }
4409 
4410  avio_rb24(pb); // flags
4411 
4412  track_id = avio_rb32(pb); // Reference ID
4413  for (i = 0; i < c->fc->nb_streams; i++) {
4414  if (c->fc->streams[i]->id == track_id) {
4415  st = c->fc->streams[i];
4416  break;
4417  }
4418  }
4419  if (!st) {
4420  av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
4421  return 0;
4422  }
4423 
4424  sc = st->priv_data;
4425 
4426  timescale = av_make_q(1, avio_rb32(pb));
4427 
4428  if (timescale.den <= 0) {
4429  av_log(c->fc, AV_LOG_ERROR, "Invalid sidx timescale 1/%d\n", timescale.den);
4430  return AVERROR_INVALIDDATA;
4431  }
4432 
4433  if (version == 0) {
4434  pts = avio_rb32(pb);
4435  offset += avio_rb32(pb);
4436  } else {
4437  pts = avio_rb64(pb);
4438  offset += avio_rb64(pb);
4439  }
4440 
4441  avio_rb16(pb); // reserved
4442 
4443  index = av_mallocz(sizeof(MOVFragmentIndex));
4444  if (!index)
4445  return AVERROR(ENOMEM);
4446 
4447  index->track_id = track_id;
4448 
4449  index->item_count = avio_rb16(pb);
4450  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
4451 
4452  if (!index->items) {
4453  av_freep(&index);
4454  return AVERROR(ENOMEM);
4455  }
4456 
4457  for (i = 0; i < index->item_count; i++) {
4458  uint32_t size = avio_rb32(pb);
4459  uint32_t duration = avio_rb32(pb);
4460  if (size & 0x80000000) {
4461  avpriv_request_sample(c->fc, "sidx reference_type 1");
4462  av_freep(&index->items);
4463  av_freep(&index);
4464  return AVERROR_PATCHWELCOME;
4465  }
4466  avio_rb32(pb); // sap_flags
4467  index->items[i].moof_offset = offset;
4468  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
4469  offset += size;
4470  pts += duration;
4471  }
4472 
4473  st->duration = sc->track_end = pts;
4474 
4476  c->fragment_index_count + 1,
4477  sizeof(MOVFragmentIndex*));
4478  if (!tmp) {
4479  av_freep(&index->items);
4480  av_freep(&index);
4481  return AVERROR(ENOMEM);
4482  }
4483 
4484  c->fragment_index_data = tmp;
4486  sc->has_sidx = 1;
4487 
4488  if (offset == avio_size(pb)) {
4489  for (i = 0; i < c->fc->nb_streams; i++) {
4490  if (c->fc->streams[i]->id == c->fragment_index_data[0]->track_id) {
4491  ref_st = c->fc->streams[i];
4492  ref_sc = ref_st->priv_data;
4493  break;
4494  }
4495  }
4496  for (i = 0; i < c->fc->nb_streams; i++) {
4497  st = c->fc->streams[i];
4498  sc = st->priv_data;
4499  if (!sc->has_sidx) {
4500  st->duration = sc->track_end = av_rescale(ref_st->duration, sc->time_scale, ref_sc->time_scale);
4501  }
4502  }
4503 
4504  c->fragment_index_complete = 1;
4505  }
4506 
4507  return 0;
4508 }
4509 
4510 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
4511 /* like the files created with Adobe Premiere 5.0, for samples see */
4512 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
4514 {
4515  int err;
4516 
4517  if (atom.size < 8)
4518  return 0; /* continue */
4519  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
4520  avio_skip(pb, atom.size - 4);
4521  return 0;
4522  }
4523  atom.type = avio_rl32(pb);
4524  atom.size -= 8;
4525  if (atom.type != MKTAG('m','d','a','t')) {
4526  avio_skip(pb, atom.size);
4527  return 0;
4528  }
4529  err = mov_read_mdat(c, pb, atom);
4530  return err;
4531 }
4532 
4534 {
4535 #if CONFIG_ZLIB
4536  AVIOContext ctx;
4537  uint8_t *cmov_data;
4538  uint8_t *moov_data; /* uncompressed data */
4539  long cmov_len, moov_len;
4540  int ret = -1;
4541 
4542  avio_rb32(pb); /* dcom atom */
4543  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
4544  return AVERROR_INVALIDDATA;
4545  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
4546  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
4547  return AVERROR_INVALIDDATA;
4548  }
4549  avio_rb32(pb); /* cmvd atom */
4550  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
4551  return AVERROR_INVALIDDATA;
4552  moov_len = avio_rb32(pb); /* uncompressed size */
4553  cmov_len = atom.size - 6 * 4;
4554 
4555  cmov_data = av_malloc(cmov_len);
4556  if (!cmov_data)
4557  return AVERROR(ENOMEM);
4558  moov_data = av_malloc(moov_len);
4559  if (!moov_data) {
4560  av_free(cmov_data);
4561  return AVERROR(ENOMEM);
4562  }
4563  ret = ffio_read_size(pb, cmov_data, cmov_len);
4564  if (ret < 0)
4565  goto free_and_return;
4566 
4567  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
4568  goto free_and_return;
4569  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
4570  goto free_and_return;
4572  atom.type = MKTAG('m','o','o','v');
4573  atom.size = moov_len;
4574  ret = mov_read_default(c, &ctx, atom);
4575 free_and_return:
4576  av_free(moov_data);
4577  av_free(cmov_data);
4578  return ret;
4579 #else
4580  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
4581  return AVERROR(ENOSYS);
4582 #endif
4583 }
4584 
4585 /* edit list atom */
4587 {
4588  MOVStreamContext *sc;
4589  int i, edit_count, version;
4590 
4591  if (c->fc->nb_streams < 1 || c->ignore_editlist)
4592  return 0;
4593  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
4594 
4595  version = avio_r8(pb); /* version */
4596  avio_rb24(pb); /* flags */
4597  edit_count = avio_rb32(pb); /* entries */
4598 
4599  if (!edit_count)
4600  return 0;
4601  if (sc->elst_data)
4602  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
4603  av_free(sc->elst_data);
4604  sc->elst_count = 0;
4605  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
4606  if (!sc->elst_data)
4607  return AVERROR(ENOMEM);
4608 
4609  av_log(c->fc, AV_LOG_TRACE, "track[%u].edit_count = %i\n", c->fc->nb_streams - 1, edit_count);
4610  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
4611  MOVElst *e = &sc->elst_data[i];
4612 
4613  if (version == 1) {
4614  e->duration = avio_rb64(pb);
4615  e->time = avio_rb64(pb);
4616  } else {
4617  e->duration = avio_rb32(pb); /* segment duration */
4618  e->time = (int32_t)avio_rb32(pb); /* media time */
4619  }
4620  e->rate = avio_rb32(pb) / 65536.0;
4621  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
4622  e->duration, e->time, e->rate);
4623 
4624  if (e->time < 0 && e->time != -1 &&
4626  av_log(c->fc, AV_LOG_ERROR, "Track %d, edit %d: Invalid edit list media time=%"PRId64"\n",
4627  c->fc->nb_streams-1, i, e->time);
4628  return AVERROR_INVALIDDATA;
4629  }
4630  }
4631  sc->elst_count = i;
4632 
4633  return 0;
4634 }
4635 
4637 {
4638  MOVStreamContext *sc;
4639 
4640  if (c->fc->nb_streams < 1)
4641  return AVERROR_INVALIDDATA;
4642  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4643  sc->timecode_track = avio_rb32(pb);
4644  return 0;
4645 }
4646 
4648 {
4649  AVStream *st;
4650  int version, color_range, color_primaries, color_trc, color_space;
4651 
4652  if (c->fc->nb_streams < 1)
4653  return 0;
4654  st = c->fc->streams[c->fc->nb_streams - 1];
4655 
4656  if (atom.size < 5) {
4657  av_log(c->fc, AV_LOG_ERROR, "Empty VP Codec Configuration box\n");
4658  return AVERROR_INVALIDDATA;
4659  }
4660 
4661  version = avio_r8(pb);
4662  if (version != 1) {
4663  av_log(c->fc, AV_LOG_WARNING, "Unsupported VP Codec Configuration box version %d\n", version);
4664  return 0;
4665  }
4666  avio_skip(pb, 3); /* flags */
4667 
4668  avio_skip(pb, 2); /* profile + level */
4669  color_range = avio_r8(pb); /* bitDepth, chromaSubsampling, videoFullRangeFlag */
4670  color_primaries = avio_r8(pb);
4671  color_trc = avio_r8(pb);
4672  color_space = avio_r8(pb);
4673  if (avio_rb16(pb)) /* codecIntializationDataSize */
4674  return AVERROR_INVALIDDATA;
4675 
4676  if (!av_color_primaries_name(color_primaries))
4677  color_primaries = AVCOL_PRI_UNSPECIFIED;
4678  if (!av_color_transfer_name(color_trc))
4679  color_trc = AVCOL_TRC_UNSPECIFIED;
4680  if (!av_color_space_name(color_space))
4681  color_space = AVCOL_SPC_UNSPECIFIED;
4682 
4683  st->codecpar->color_range = (color_range & 1) ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
4685  st->codecpar->color_trc = color_trc;
4686  st->codecpar->color_space = color_space;
4687 
4688  return 0;
4689 }
4690 
4692 {
4693  MOVStreamContext *sc;
4694  const int chroma_den = 50000;
4695  const int luma_den = 10000;
4696  int i, j, version;
4697 
4698  if (c->fc->nb_streams < 1)
4699  return AVERROR_INVALIDDATA;
4700 
4701  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4702 
4703  if (atom.size < 5) {
4704  av_log(c->fc, AV_LOG_ERROR, "Empty Mastering Display Metadata box\n");
4705  return AVERROR_INVALIDDATA;
4706  }