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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  return 0;
893  }
894  st = c->fc->streams[c->fc->nb_streams-1];
895 
896  st->codecpar->sample_rate = get_bits_long(&gb, 32);
897  if (st->codecpar->sample_rate <= 0) {
898  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
899  return AVERROR_INVALIDDATA;
900  }
901  skip_bits_long(&gb, 32); /* max bitrate */
902  st->codecpar->bit_rate = get_bits_long(&gb, 32);
903  st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
904  frame_duration_code = get_bits(&gb, 2);
905  skip_bits(&gb, 30); /* various fields */
906  channel_layout_code = get_bits(&gb, 16);
907 
908  st->codecpar->frame_size =
909  (frame_duration_code == 0) ? 512 :
910  (frame_duration_code == 1) ? 1024 :
911  (frame_duration_code == 2) ? 2048 :
912  (frame_duration_code == 3) ? 4096 : 0;
913 
914  if (channel_layout_code > 0xff) {
915  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
916  }
917  st->codecpar->channel_layout =
918  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
919  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
920  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
921  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
922  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
923  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
924 
926 
927  return 0;
928 }
929 
931 {
932  AVStream *st;
933 
934  if (c->fc->nb_streams < 1)
935  return 0;
936  st = c->fc->streams[c->fc->nb_streams-1];
937 
938  if (atom.size < 16)
939  return 0;
940 
941  /* skip version and flags */
942  avio_skip(pb, 4);
943 
944  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
945 
946  return 0;
947 }
948 
950 {
951  AVStream *st;
952  int ret;
953 
954  if (c->fc->nb_streams < 1)
955  return 0;
956  st = c->fc->streams[c->fc->nb_streams-1];
957 
958  if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
959  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
960 
961  return ret;
962 }
963 
965 {
966  const int num = avio_rb32(pb);
967  const int den = avio_rb32(pb);
968  AVStream *st;
969 
970  if (c->fc->nb_streams < 1)
971  return 0;
972  st = c->fc->streams[c->fc->nb_streams-1];
973 
974  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
975  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
977  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
979  num, den);
980  } else if (den != 0) {
982  num, den, 32767);
983  }
984  return 0;
985 }
986 
987 /* this atom contains actual media data */
989 {
990  if (atom.size == 0) /* wrong one (MP4) */
991  return 0;
992  c->found_mdat=1;
993  return 0; /* now go for moov */
994 }
995 
996 #define DRM_BLOB_SIZE 56
997 
999 {
1000  uint8_t intermediate_key[20];
1001  uint8_t intermediate_iv[20];
1002  uint8_t input[64];
1003  uint8_t output[64];
1004  uint8_t file_checksum[20];
1005  uint8_t calculated_checksum[20];
1006  struct AVSHA *sha;
1007  int i;
1008  int ret = 0;
1009  uint8_t *activation_bytes = c->activation_bytes;
1010  uint8_t *fixed_key = c->audible_fixed_key;
1011 
1012  c->aax_mode = 1;
1013 
1014  sha = av_sha_alloc();
1015  if (!sha)
1016  return AVERROR(ENOMEM);
1017  c->aes_decrypt = av_aes_alloc();
1018  if (!c->aes_decrypt) {
1019  ret = AVERROR(ENOMEM);
1020  goto fail;
1021  }
1022 
1023  /* drm blob processing */
1024  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
1025  avio_read(pb, input, DRM_BLOB_SIZE);
1026  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
1027  avio_read(pb, file_checksum, 20);
1028 
1029  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
1030  for (i = 0; i < 20; i++)
1031  av_log(c->fc, AV_LOG_INFO, "%02x", file_checksum[i]);
1032  av_log(c->fc, AV_LOG_INFO, "\n");
1033 
1034  /* verify activation data */
1035  if (!activation_bytes) {
1036  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
1037  ret = 0; /* allow ffprobe to continue working on .aax files */
1038  goto fail;
1039  }
1040  if (c->activation_bytes_size != 4) {
1041  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
1042  ret = AVERROR(EINVAL);
1043  goto fail;
1044  }
1045 
1046  /* verify fixed key */
1047  if (c->audible_fixed_key_size != 16) {
1048  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
1049  ret = AVERROR(EINVAL);
1050  goto fail;
1051  }
1052 
1053  /* AAX (and AAX+) key derivation */
1054  av_sha_init(sha, 160);
1055  av_sha_update(sha, fixed_key, 16);
1056  av_sha_update(sha, activation_bytes, 4);
1057  av_sha_final(sha, intermediate_key);
1058  av_sha_init(sha, 160);
1059  av_sha_update(sha, fixed_key, 16);
1060  av_sha_update(sha, intermediate_key, 20);
1061  av_sha_update(sha, activation_bytes, 4);
1062  av_sha_final(sha, intermediate_iv);
1063  av_sha_init(sha, 160);
1064  av_sha_update(sha, intermediate_key, 16);
1065  av_sha_update(sha, intermediate_iv, 16);
1066  av_sha_final(sha, calculated_checksum);
1067  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1068  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1069  ret = AVERROR_INVALIDDATA;
1070  goto fail;
1071  }
1072  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1073  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1074  for (i = 0; i < 4; i++) {
1075  // file data (in output) is stored in big-endian mode
1076  if (activation_bytes[i] != output[3 - i]) { // critical error
1077  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1078  ret = AVERROR_INVALIDDATA;
1079  goto fail;
1080  }
1081  }
1082  memcpy(c->file_key, output + 8, 16);
1083  memcpy(input, output + 26, 16);
1084  av_sha_init(sha, 160);
1085  av_sha_update(sha, input, 16);
1086  av_sha_update(sha, c->file_key, 16);
1087  av_sha_update(sha, fixed_key, 16);
1088  av_sha_final(sha, c->file_iv);
1089 
1090 fail:
1091  av_free(sha);
1092 
1093  return ret;
1094 }
1095 
1096 // Audible AAX (and AAX+) bytestream decryption
1097 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1098 {
1099  int blocks = 0;
1100  unsigned char iv[16];
1101 
1102  memcpy(iv, c->file_iv, 16); // iv is overwritten
1103  blocks = size >> 4; // trailing bytes are not encrypted!
1104  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1105  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1106 
1107  return 0;
1108 }
1109 
1110 /* read major brand, minor version and compatible brands and store them as metadata */
1112 {
1113  uint32_t minor_ver;
1114  int comp_brand_size;
1115  char* comp_brands_str;
1116  uint8_t type[5] = {0};
1117  int ret = ffio_read_size(pb, type, 4);
1118  if (ret < 0)
1119  return ret;
1120 
1121  if (strcmp(type, "qt "))
1122  c->isom = 1;
1123  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1124  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1125  minor_ver = avio_rb32(pb); /* minor version */
1126  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1127 
1128  comp_brand_size = atom.size - 8;
1129  if (comp_brand_size < 0)
1130  return AVERROR_INVALIDDATA;
1131  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1132  if (!comp_brands_str)
1133  return AVERROR(ENOMEM);
1134 
1135  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1136  if (ret < 0) {
1137  av_freep(&comp_brands_str);
1138  return ret;
1139  }
1140  comp_brands_str[comp_brand_size] = 0;
1141  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1142  av_freep(&comp_brands_str);
1143 
1144  return 0;
1145 }
1146 
1147 /* this atom should contain all header atoms */
1149 {
1150  int ret;
1151 
1152  if (c->found_moov) {
1153  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1154  avio_skip(pb, atom.size);
1155  return 0;
1156  }
1157 
1158  if ((ret = mov_read_default(c, pb, atom)) < 0)
1159  return ret;
1160  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1161  /* so we don't parse the whole file if over a network */
1162  c->found_moov=1;
1163  return 0; /* now go for mdat */
1164 }
1165 
1167 {
1168  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1169  c->has_looked_for_mfra = 1;
1170  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1171  int ret;
1172  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1173  "for a mfra\n");
1174  if ((ret = mov_read_mfra(c, pb)) < 0) {
1175  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1176  "read the mfra (may be a live ismv)\n");
1177  }
1178  } else {
1179  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1180  "seekable, can not look for mfra\n");
1181  }
1182  }
1184  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1185  return mov_read_default(c, pb, atom);
1186 }
1187 
1188 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1189 {
1190  if (time) {
1191  if(time >= 2082844800)
1192  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1193 
1194  if ((int64_t)(time * 1000000ULL) / 1000000 != time) {
1195  av_log(NULL, AV_LOG_DEBUG, "creation_time is not representable\n");
1196  return;
1197  }
1198 
1199  avpriv_dict_set_timestamp(metadata, "creation_time", time * 1000000);
1200  }
1201 }
1202 
1204 {
1205  AVStream *st;
1206  MOVStreamContext *sc;
1207  int version;
1208  char language[4] = {0};
1209  unsigned lang;
1210  int64_t creation_time;
1211 
1212  if (c->fc->nb_streams < 1)
1213  return 0;
1214  st = c->fc->streams[c->fc->nb_streams-1];
1215  sc = st->priv_data;
1216 
1217  if (sc->time_scale) {
1218  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1219  return AVERROR_INVALIDDATA;
1220  }
1221 
1222  version = avio_r8(pb);
1223  if (version > 1) {
1224  avpriv_request_sample(c->fc, "Version %d", version);
1225  return AVERROR_PATCHWELCOME;
1226  }
1227  avio_rb24(pb); /* flags */
1228  if (version == 1) {
1229  creation_time = avio_rb64(pb);
1230  avio_rb64(pb);
1231  } else {
1232  creation_time = avio_rb32(pb);
1233  avio_rb32(pb); /* modification time */
1234  }
1235  mov_metadata_creation_time(&st->metadata, creation_time);
1236 
1237  sc->time_scale = avio_rb32(pb);
1238  if (sc->time_scale <= 0) {
1239  av_log(c->fc, AV_LOG_ERROR, "Invalid mdhd time scale %d, defaulting to 1\n", sc->time_scale);
1240  sc->time_scale = 1;
1241  }
1242  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1243 
1244  lang = avio_rb16(pb); /* language */
1245  if (ff_mov_lang_to_iso639(lang, language))
1246  av_dict_set(&st->metadata, "language", language, 0);
1247  avio_rb16(pb); /* quality */
1248 
1249  return 0;
1250 }
1251 
1253 {
1254  int i;
1255  int64_t creation_time;
1256  int version = avio_r8(pb); /* version */
1257  avio_rb24(pb); /* flags */
1258 
1259  if (version == 1) {
1260  creation_time = avio_rb64(pb);
1261  avio_rb64(pb);
1262  } else {
1263  creation_time = avio_rb32(pb);
1264  avio_rb32(pb); /* modification time */
1265  }
1266  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1267  c->time_scale = avio_rb32(pb); /* time scale */
1268  if (c->time_scale <= 0) {
1269  av_log(c->fc, AV_LOG_ERROR, "Invalid mvhd time scale %d, defaulting to 1\n", c->time_scale);
1270  c->time_scale = 1;
1271  }
1272  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1273 
1274  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1275  // set the AVCodecContext duration because the duration of individual tracks
1276  // may be inaccurate
1277  if (c->time_scale > 0 && !c->trex_data)
1279  avio_rb32(pb); /* preferred scale */
1280 
1281  avio_rb16(pb); /* preferred volume */
1282 
1283  avio_skip(pb, 10); /* reserved */
1284 
1285  /* movie display matrix, store it in main context and use it later on */
1286  for (i = 0; i < 3; i++) {
1287  c->movie_display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
1288  c->movie_display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
1289  c->movie_display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
1290  }
1291 
1292  avio_rb32(pb); /* preview time */
1293  avio_rb32(pb); /* preview duration */
1294  avio_rb32(pb); /* poster time */
1295  avio_rb32(pb); /* selection time */
1296  avio_rb32(pb); /* selection duration */
1297  avio_rb32(pb); /* current time */
1298  avio_rb32(pb); /* next track ID */
1299 
1300  return 0;
1301 }
1302 
1304 {
1305  AVStream *st;
1306  int little_endian;
1307 
1308  if (c->fc->nb_streams < 1)
1309  return 0;
1310  st = c->fc->streams[c->fc->nb_streams-1];
1311 
1312  little_endian = avio_rb16(pb) & 0xFF;
1313  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1314  if (little_endian == 1) {
1315  switch (st->codecpar->codec_id) {
1316  case AV_CODEC_ID_PCM_S24BE:
1318  break;
1319  case AV_CODEC_ID_PCM_S32BE:
1321  break;
1322  case AV_CODEC_ID_PCM_F32BE:
1324  break;
1325  case AV_CODEC_ID_PCM_F64BE:
1327  break;
1328  default:
1329  break;
1330  }
1331  }
1332  return 0;
1333 }
1334 
1336 {
1337  AVStream *st;
1338  char color_parameter_type[5] = { 0 };
1339  uint16_t color_primaries, color_trc, color_matrix;
1340  int ret;
1341 
1342  if (c->fc->nb_streams < 1)
1343  return 0;
1344  st = c->fc->streams[c->fc->nb_streams - 1];
1345 
1346  ret = ffio_read_size(pb, color_parameter_type, 4);
1347  if (ret < 0)
1348  return ret;
1349  if (strncmp(color_parameter_type, "nclx", 4) &&
1350  strncmp(color_parameter_type, "nclc", 4)) {
1351  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1352  color_parameter_type);
1353  return 0;
1354  }
1355 
1356  color_primaries = avio_rb16(pb);
1357  color_trc = avio_rb16(pb);
1358  color_matrix = avio_rb16(pb);
1359 
1360  av_log(c->fc, AV_LOG_TRACE,
1361  "%s: pri %d trc %d matrix %d",
1362  color_parameter_type, color_primaries, color_trc, color_matrix);
1363 
1364  if (!strncmp(color_parameter_type, "nclx", 4)) {
1365  uint8_t color_range = avio_r8(pb) >> 7;
1366  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1367  if (color_range)
1369  else
1371  }
1372 
1373  if (!av_color_primaries_name(color_primaries))
1374  color_primaries = AVCOL_PRI_UNSPECIFIED;
1375  if (!av_color_transfer_name(color_trc))
1376  color_trc = AVCOL_TRC_UNSPECIFIED;
1377  if (!av_color_space_name(color_matrix))
1378  color_matrix = AVCOL_SPC_UNSPECIFIED;
1379 
1381  st->codecpar->color_trc = color_trc;
1382  st->codecpar->color_space = color_matrix;
1383  av_log(c->fc, AV_LOG_TRACE, "\n");
1384 
1385  return 0;
1386 }
1387 
1389 {
1390  AVStream *st;
1391  unsigned mov_field_order;
1392  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1393 
1394  if (c->fc->nb_streams < 1) // will happen with jp2 files
1395  return 0;
1396  st = c->fc->streams[c->fc->nb_streams-1];
1397  if (atom.size < 2)
1398  return AVERROR_INVALIDDATA;
1399  mov_field_order = avio_rb16(pb);
1400  if ((mov_field_order & 0xFF00) == 0x0100)
1401  decoded_field_order = AV_FIELD_PROGRESSIVE;
1402  else if ((mov_field_order & 0xFF00) == 0x0200) {
1403  switch (mov_field_order & 0xFF) {
1404  case 0x01: decoded_field_order = AV_FIELD_TT;
1405  break;
1406  case 0x06: decoded_field_order = AV_FIELD_BB;
1407  break;
1408  case 0x09: decoded_field_order = AV_FIELD_TB;
1409  break;
1410  case 0x0E: decoded_field_order = AV_FIELD_BT;
1411  break;
1412  }
1413  }
1414  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1415  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1416  }
1417  st->codecpar->field_order = decoded_field_order;
1418 
1419  return 0;
1420 }
1421 
1423 {
1424  int err = 0;
1425  uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1426  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1427  return AVERROR_INVALIDDATA;
1428  if ((err = av_reallocp(&par->extradata, size)) < 0) {
1429  par->extradata_size = 0;
1430  return err;
1431  }
1433  return 0;
1434 }
1435 
1436 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1438  AVCodecParameters *par, uint8_t *buf)
1439 {
1440  int64_t result = atom.size;
1441  int err;
1442 
1443  AV_WB32(buf , atom.size + 8);
1444  AV_WL32(buf + 4, atom.type);
1445  err = ffio_read_size(pb, buf + 8, atom.size);
1446  if (err < 0) {
1447  par->extradata_size -= atom.size;
1448  return err;
1449  } else if (err < atom.size) {
1450  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1451  par->extradata_size -= atom.size - err;
1452  result = err;
1453  }
1454  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1455  return result;
1456 }
1457 
1458 /* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1460  enum AVCodecID codec_id)
1461 {
1462  AVStream *st;
1463  uint64_t original_size;
1464  int err;
1465 
1466  if (c->fc->nb_streams < 1) // will happen with jp2 files
1467  return 0;
1468  st = c->fc->streams[c->fc->nb_streams-1];
1469 
1470  if (st->codecpar->codec_id != codec_id)
1471  return 0; /* unexpected codec_id - don't mess with extradata */
1472 
1473  original_size = st->codecpar->extradata_size;
1474  err = mov_realloc_extradata(st->codecpar, atom);
1475  if (err)
1476  return err;
1477 
1478  err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1479  if (err < 0)
1480  return err;
1481  return 0; // Note: this is the original behavior to ignore truncation.
1482 }
1483 
1484 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1486 {
1487  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1488 }
1489 
1491 {
1492  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1493 }
1494 
1496 {
1497  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1498 }
1499 
1501 {
1502  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1503 }
1504 
1506 {
1507  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1508  if(ret == 0)
1509  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1510  return ret;
1511 }
1512 
1514 {
1515  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1516 
1517  if (!ret && c->fc->nb_streams >= 1) {
1518  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1519  if (par->extradata_size >= 40) {
1520  par->height = AV_RB16(&par->extradata[36]);
1521  par->width = AV_RB16(&par->extradata[38]);
1522  }
1523  }
1524  return ret;
1525 }
1526 
1528 {
1529  if (c->fc->nb_streams >= 1) {
1530  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1531  if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1532  par->codec_id == AV_CODEC_ID_H264 &&
1533  atom.size > 11) {
1534  int cid;
1535  avio_skip(pb, 10);
1536  cid = avio_rb16(pb);
1537  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1538  if (cid == 0xd4d || cid == 0xd4e)
1539  par->width = 1440;
1540  return 0;
1541  } else if ((par->codec_tag == MKTAG('A', 'V', 'd', '1') ||
1542  par->codec_tag == MKTAG('A', 'V', 'd', 'n')) &&
1543  atom.size >= 24) {
1544  int num, den;
1545  avio_skip(pb, 12);
1546  num = avio_rb32(pb);
1547  den = avio_rb32(pb);
1548  if (num <= 0 || den <= 0)
1549  return 0;
1550  switch (avio_rb32(pb)) {
1551  case 2:
1552  if (den >= INT_MAX / 2)
1553  return 0;
1554  den *= 2;
1555  case 1:
1556  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1557  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1558  default:
1559  return 0;
1560  }
1561  }
1562  }
1563 
1564  return mov_read_avid(c, pb, atom);
1565 }
1566 
1568 {
1569  int ret = 0;
1570  int length = 0;
1571  uint64_t original_size;
1572  if (c->fc->nb_streams >= 1) {
1573  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1574  if (par->codec_id == AV_CODEC_ID_H264)
1575  return 0;
1576  if (atom.size == 16) {
1577  original_size = par->extradata_size;
1578  ret = mov_realloc_extradata(par, atom);
1579  if (!ret) {
1580  length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1581  if (length == atom.size) {
1582  const uint8_t range_value = par->extradata[original_size + 19];
1583  switch (range_value) {
1584  case 1:
1586  break;
1587  case 2:
1589  break;
1590  default:
1591  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1592  break;
1593  }
1594  ff_dlog(c, "color_range: %d\n", par->color_range);
1595  } else {
1596  /* For some reason the whole atom was not added to the extradata */
1597  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1598  }
1599  } else {
1600  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1601  }
1602  } else {
1603  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1604  }
1605  }
1606 
1607  return ret;
1608 }
1609 
1611 {
1612  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1613 }
1614 
1616 {
1617  AVStream *st;
1618  int ret;
1619 
1620  if (c->fc->nb_streams < 1)
1621  return 0;
1622  st = c->fc->streams[c->fc->nb_streams-1];
1623 
1624  if ((uint64_t)atom.size > (1<<30))
1625  return AVERROR_INVALIDDATA;
1626 
1627  if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1630  // pass all frma atom to codec, needed at least for QDMC and QDM2
1631  av_freep(&st->codecpar->extradata);
1632  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1633  if (ret < 0)
1634  return ret;
1635  } else if (atom.size > 8) { /* to read frma, esds atoms */
1636  if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1637  uint64_t buffer;
1638  ret = ffio_ensure_seekback(pb, 8);
1639  if (ret < 0)
1640  return ret;
1641  buffer = avio_rb64(pb);
1642  atom.size -= 8;
1643  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1644  && buffer >> 32 <= atom.size
1645  && buffer >> 32 >= 8) {
1646  avio_skip(pb, -8);
1647  atom.size += 8;
1648  } else if (!st->codecpar->extradata_size) {
1649 #define ALAC_EXTRADATA_SIZE 36
1651  if (!st->codecpar->extradata)
1652  return AVERROR(ENOMEM);
1655  AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1656  AV_WB64(st->codecpar->extradata + 12, buffer);
1657  avio_read(pb, st->codecpar->extradata + 20, 16);
1658  avio_skip(pb, atom.size - 24);
1659  return 0;
1660  }
1661  }
1662  if ((ret = mov_read_default(c, pb, atom)) < 0)
1663  return ret;
1664  } else
1665  avio_skip(pb, atom.size);
1666  return 0;
1667 }
1668 
1669 /**
1670  * This function reads atom content and puts data in extradata without tag
1671  * nor size unlike mov_read_extradata.
1672  */
1674 {
1675  AVStream *st;
1676  int ret;
1677 
1678  if (c->fc->nb_streams < 1)
1679  return 0;
1680  st = c->fc->streams[c->fc->nb_streams-1];
1681 
1682  if ((uint64_t)atom.size > (1<<30))
1683  return AVERROR_INVALIDDATA;
1684 
1685  if (atom.size >= 10) {
1686  // Broken files created by legacy versions of libavformat will
1687  // wrap a whole fiel atom inside of a glbl atom.
1688  unsigned size = avio_rb32(pb);
1689  unsigned type = avio_rl32(pb);
1690  avio_seek(pb, -8, SEEK_CUR);
1691  if (type == MKTAG('f','i','e','l') && size == atom.size)
1692  return mov_read_default(c, pb, atom);
1693  }
1694  if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1695  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1696  return 0;
1697  }
1698  av_freep(&st->codecpar->extradata);
1699  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1700  if (ret < 0)
1701  return ret;
1702 
1703  return 0;
1704 }
1705 
1707 {
1708  AVStream *st;
1709  uint8_t profile_level;
1710  int ret;
1711 
1712  if (c->fc->nb_streams < 1)
1713  return 0;
1714  st = c->fc->streams[c->fc->nb_streams-1];
1715 
1716  if (atom.size >= (1<<28) || atom.size < 7)
1717  return AVERROR_INVALIDDATA;
1718 
1719  profile_level = avio_r8(pb);
1720  if ((profile_level & 0xf0) != 0xc0)
1721  return 0;
1722 
1723  avio_seek(pb, 6, SEEK_CUR);
1724  av_freep(&st->codecpar->extradata);
1725  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1726  if (ret < 0)
1727  return ret;
1728 
1729  return 0;
1730 }
1731 
1732 /**
1733  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1734  * but can have extradata appended at the end after the 40 bytes belonging
1735  * to the struct.
1736  */
1738 {
1739  AVStream *st;
1740  int ret;
1741 
1742  if (c->fc->nb_streams < 1)
1743  return 0;
1744  if (atom.size <= 40)
1745  return 0;
1746  st = c->fc->streams[c->fc->nb_streams-1];
1747 
1748  if ((uint64_t)atom.size > (1<<30))
1749  return AVERROR_INVALIDDATA;
1750 
1751  avio_skip(pb, 40);
1752  av_freep(&st->codecpar->extradata);
1753  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1754  if (ret < 0)
1755  return ret;
1756 
1757  return 0;
1758 }
1759 
1761 {
1762  AVStream *st;
1763  MOVStreamContext *sc;
1764  unsigned int i, entries;
1765 
1766  if (c->fc->nb_streams < 1)
1767  return 0;
1768  st = c->fc->streams[c->fc->nb_streams-1];
1769  sc = st->priv_data;
1770 
1771  avio_r8(pb); /* version */
1772  avio_rb24(pb); /* flags */
1773 
1774  entries = avio_rb32(pb);
1775 
1776  if (!entries)
1777  return 0;
1778 
1779  if (sc->chunk_offsets)
1780  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1781  av_free(sc->chunk_offsets);
1782  sc->chunk_count = 0;
1783  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1784  if (!sc->chunk_offsets)
1785  return AVERROR(ENOMEM);
1786  sc->chunk_count = entries;
1787 
1788  if (atom.type == MKTAG('s','t','c','o'))
1789  for (i = 0; i < entries && !pb->eof_reached; i++)
1790  sc->chunk_offsets[i] = avio_rb32(pb);
1791  else if (atom.type == MKTAG('c','o','6','4'))
1792  for (i = 0; i < entries && !pb->eof_reached; i++)
1793  sc->chunk_offsets[i] = avio_rb64(pb);
1794  else
1795  return AVERROR_INVALIDDATA;
1796 
1797  sc->chunk_count = i;
1798 
1799  if (pb->eof_reached)
1800  return AVERROR_EOF;
1801 
1802  return 0;
1803 }
1804 
1805 /**
1806  * Compute codec id for 'lpcm' tag.
1807  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1808  */
1810 {
1811  /* lpcm flags:
1812  * 0x1 = float
1813  * 0x2 = big-endian
1814  * 0x4 = signed
1815  */
1816  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1817 }
1818 
1819 static int mov_codec_id(AVStream *st, uint32_t format)
1820 {
1821  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1822 
1823  if (id <= 0 &&
1824  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1825  (format & 0xFFFF) == 'T' + ('S' << 8)))
1826  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1827 
1828  if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1830  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1831  /* skip old ASF MPEG-4 tag */
1832  format && format != MKTAG('m','p','4','s')) {
1834  if (id <= 0)
1835  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1836  if (id > 0)
1838  else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
1840  st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
1842  if (id > 0)
1844  }
1845  }
1846 
1847  st->codecpar->codec_tag = format;
1848 
1849  return id;
1850 }
1851 
1853  AVStream *st, MOVStreamContext *sc)
1854 {
1855  uint8_t codec_name[32] = { 0 };
1856  int64_t stsd_start;
1857  unsigned int len;
1858 
1859  /* The first 16 bytes of the video sample description are already
1860  * read in ff_mov_read_stsd_entries() */
1861  stsd_start = avio_tell(pb) - 16;
1862 
1863  avio_rb16(pb); /* version */
1864  avio_rb16(pb); /* revision level */
1865  avio_rb32(pb); /* vendor */
1866  avio_rb32(pb); /* temporal quality */
1867  avio_rb32(pb); /* spatial quality */
1868 
1869  st->codecpar->width = avio_rb16(pb); /* width */
1870  st->codecpar->height = avio_rb16(pb); /* height */
1871 
1872  avio_rb32(pb); /* horiz resolution */
1873  avio_rb32(pb); /* vert resolution */
1874  avio_rb32(pb); /* data size, always 0 */
1875  avio_rb16(pb); /* frames per samples */
1876 
1877  len = avio_r8(pb); /* codec name, pascal string */
1878  if (len > 31)
1879  len = 31;
1880  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1881  if (len < 31)
1882  avio_skip(pb, 31 - len);
1883 
1884  if (codec_name[0])
1885  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1886 
1887  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1888  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1889  st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1890  st->codecpar->width &= ~1;
1891  st->codecpar->height &= ~1;
1892  }
1893  /* Flash Media Server uses tag H.263 with Sorenson Spark */
1894  if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1895  !memcmp(codec_name, "Sorenson H263", 13))
1897 
1898  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1899 
1900  avio_seek(pb, stsd_start, SEEK_SET);
1901 
1902  if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
1903  st->codecpar->bits_per_coded_sample &= 0x1F;
1904  sc->has_palette = 1;
1905  }
1906 }
1907 
1909  AVStream *st, MOVStreamContext *sc)
1910 {
1911  int bits_per_sample, flags;
1912  uint16_t version = avio_rb16(pb);
1913  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1914 
1915  avio_rb16(pb); /* revision level */
1916  avio_rb32(pb); /* vendor */
1917 
1918  st->codecpar->channels = avio_rb16(pb); /* channel count */
1919  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1920  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1921 
1922  sc->audio_cid = avio_rb16(pb);
1923  avio_rb16(pb); /* packet size = 0 */
1924 
1925  st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1926 
1927  // Read QT version 1 fields. In version 0 these do not exist.
1928  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1929  if (!c->isom ||
1930  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1931 
1932  if (version == 1) {
1933  sc->samples_per_frame = avio_rb32(pb);
1934  avio_rb32(pb); /* bytes per packet */
1935  sc->bytes_per_frame = avio_rb32(pb);
1936  avio_rb32(pb); /* bytes per sample */
1937  } else if (version == 2) {
1938  avio_rb32(pb); /* sizeof struct only */
1940  st->codecpar->channels = avio_rb32(pb);
1941  avio_rb32(pb); /* always 0x7F000000 */
1943 
1944  flags = avio_rb32(pb); /* lpcm format specific flag */
1945  sc->bytes_per_frame = avio_rb32(pb);
1946  sc->samples_per_frame = avio_rb32(pb);
1947  if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1948  st->codecpar->codec_id =
1950  flags);
1951  }
1952  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1953  /* can't correctly handle variable sized packet as audio unit */
1954  switch (st->codecpar->codec_id) {
1955  case AV_CODEC_ID_MP2:
1956  case AV_CODEC_ID_MP3:
1958  break;
1959  }
1960  }
1961  }
1962 
1963  if (sc->format == 0) {
1964  if (st->codecpar->bits_per_coded_sample == 8)
1965  st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1966  else if (st->codecpar->bits_per_coded_sample == 16)
1967  st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1968  }
1969 
1970  switch (st->codecpar->codec_id) {
1971  case AV_CODEC_ID_PCM_S8:
1972  case AV_CODEC_ID_PCM_U8:
1973  if (st->codecpar->bits_per_coded_sample == 16)
1975  break;
1976  case AV_CODEC_ID_PCM_S16LE:
1977  case AV_CODEC_ID_PCM_S16BE:
1978  if (st->codecpar->bits_per_coded_sample == 8)
1980  else if (st->codecpar->bits_per_coded_sample == 24)
1981  st->codecpar->codec_id =
1984  else if (st->codecpar->bits_per_coded_sample == 32)
1985  st->codecpar->codec_id =
1988  break;
1989  /* set values for old format before stsd version 1 appeared */
1990  case AV_CODEC_ID_MACE3:
1991  sc->samples_per_frame = 6;
1992  sc->bytes_per_frame = 2 * st->codecpar->channels;
1993  break;
1994  case AV_CODEC_ID_MACE6:
1995  sc->samples_per_frame = 6;
1996  sc->bytes_per_frame = 1 * st->codecpar->channels;
1997  break;
1999  sc->samples_per_frame = 64;
2000  sc->bytes_per_frame = 34 * st->codecpar->channels;
2001  break;
2002  case AV_CODEC_ID_GSM:
2003  sc->samples_per_frame = 160;
2004  sc->bytes_per_frame = 33;
2005  break;
2006  default:
2007  break;
2008  }
2009 
2010  bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2011  if (bits_per_sample) {
2012  st->codecpar->bits_per_coded_sample = bits_per_sample;
2013  sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
2014  }
2015 }
2016 
2018  AVStream *st, MOVStreamContext *sc,
2019  int64_t size)
2020 {
2021  // ttxt stsd contains display flags, justification, background
2022  // color, fonts, and default styles, so fake an atom to read it
2023  MOVAtom fake_atom = { .size = size };
2024  // mp4s contains a regular esds atom
2025  if (st->codecpar->codec_tag != AV_RL32("mp4s"))
2026  mov_read_glbl(c, pb, fake_atom);
2027  st->codecpar->width = sc->width;
2028  st->codecpar->height = sc->height;
2029 }
2030 
2031 static uint32_t yuv_to_rgba(uint32_t ycbcr)
2032 {
2033  uint8_t r, g, b;
2034  int y, cb, cr;
2035 
2036  y = (ycbcr >> 16) & 0xFF;
2037  cr = (ycbcr >> 8) & 0xFF;
2038  cb = ycbcr & 0xFF;
2039 
2040  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
2041  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
2042  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
2043 
2044  return (r << 16) | (g << 8) | b;
2045 }
2046 
2048 {
2049  char buf[256] = {0};
2050  uint8_t *src = st->codecpar->extradata;
2051  int i;
2052 
2053  if (st->codecpar->extradata_size != 64)
2054  return 0;
2055 
2056  if (st->codecpar->width > 0 && st->codecpar->height > 0)
2057  snprintf(buf, sizeof(buf), "size: %dx%d\n",
2058  st->codecpar->width, st->codecpar->height);
2059  av_strlcat(buf, "palette: ", sizeof(buf));
2060 
2061  for (i = 0; i < 16; i++) {
2062  uint32_t yuv = AV_RB32(src + i * 4);
2063  uint32_t rgba = yuv_to_rgba(yuv);
2064 
2065  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2066  }
2067 
2068  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2069  return 0;
2070 
2071  av_freep(&st->codecpar->extradata);
2072  st->codecpar->extradata_size = 0;
2074  if (!st->codecpar->extradata)
2075  return AVERROR(ENOMEM);
2076  st->codecpar->extradata_size = strlen(buf);
2077  memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2078 
2079  return 0;
2080 }
2081 
2083  AVStream *st, MOVStreamContext *sc,
2084  int64_t size)
2085 {
2086  int ret;
2087 
2088  if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2089  if ((int)size != size)
2090  return AVERROR(ENOMEM);
2091 
2092  ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2093  if (ret < 0)
2094  return ret;
2095  if (size > 16) {
2096  MOVStreamContext *tmcd_ctx = st->priv_data;
2097  int val;
2098  val = AV_RB32(st->codecpar->extradata + 4);
2099  tmcd_ctx->tmcd_flags = val;
2100  st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2101  st->avg_frame_rate.den = 1;
2102 #if FF_API_LAVF_AVCTX
2104  st->codec->time_base = av_inv_q(st->avg_frame_rate);
2106 #endif
2107  /* adjust for per frame dur in counter mode */
2108  if (tmcd_ctx->tmcd_flags & 0x0008) {
2109  int timescale = AV_RB32(st->codecpar->extradata + 8);
2110  int framedur = AV_RB32(st->codecpar->extradata + 12);
2111  st->avg_frame_rate.num *= timescale;
2112  st->avg_frame_rate.den *= framedur;
2113 #if FF_API_LAVF_AVCTX
2115  st->codec->time_base.den *= timescale;
2116  st->codec->time_base.num *= framedur;
2118 #endif
2119  }
2120  if (size > 30) {
2121  uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2122  uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2123  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2124  uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2125  if (str_size > 0 && size >= (int)str_size + 26) {
2126  char *reel_name = av_malloc(str_size + 1);
2127  if (!reel_name)
2128  return AVERROR(ENOMEM);
2129  memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2130  reel_name[str_size] = 0; /* Add null terminator */
2131  /* don't add reel_name if emtpy string */
2132  if (*reel_name == 0) {
2133  av_free(reel_name);
2134  } else {
2135  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2136  }
2137  }
2138  }
2139  }
2140  }
2141  } else {
2142  /* other codec type, just skip (rtp, mp4s ...) */
2143  avio_skip(pb, size);
2144  }
2145  return 0;
2146 }
2147 
2149  AVStream *st, MOVStreamContext *sc)
2150 {
2151  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2152  !st->codecpar->sample_rate && sc->time_scale > 1)
2153  st->codecpar->sample_rate = sc->time_scale;
2154 
2155  /* special codec parameters handling */
2156  switch (st->codecpar->codec_id) {
2157 #if CONFIG_DV_DEMUXER
2158  case AV_CODEC_ID_DVAUDIO:
2160  if (!c->dv_fctx) {
2161  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2162  return AVERROR(ENOMEM);
2163  }
2165  if (!c->dv_demux) {
2166  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2167  return AVERROR(ENOMEM);
2168  }
2169  sc->dv_audio_container = 1;
2171  break;
2172 #endif
2173  /* no ifdef since parameters are always those */
2174  case AV_CODEC_ID_QCELP:
2175  st->codecpar->channels = 1;
2176  // force sample rate for qcelp when not stored in mov
2177  if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2178  st->codecpar->sample_rate = 8000;
2179  // FIXME: Why is the following needed for some files?
2180  sc->samples_per_frame = 160;
2181  if (!sc->bytes_per_frame)
2182  sc->bytes_per_frame = 35;
2183  break;
2184  case AV_CODEC_ID_AMR_NB:
2185  st->codecpar->channels = 1;
2186  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2187  st->codecpar->sample_rate = 8000;
2188  break;
2189  case AV_CODEC_ID_AMR_WB:
2190  st->codecpar->channels = 1;
2191  st->codecpar->sample_rate = 16000;
2192  break;
2193  case AV_CODEC_ID_MP2:
2194  case AV_CODEC_ID_MP3:
2195  /* force type after stsd for m1a hdlr */
2197  break;
2198  case AV_CODEC_ID_GSM:
2199  case AV_CODEC_ID_ADPCM_MS:
2201  case AV_CODEC_ID_ILBC:
2202  case AV_CODEC_ID_MACE3:
2203  case AV_CODEC_ID_MACE6:
2204  case AV_CODEC_ID_QDM2:
2206  break;
2207  case AV_CODEC_ID_ALAC:
2208  if (st->codecpar->extradata_size == 36) {
2209  st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2210  st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2211  }
2212  break;
2213  case AV_CODEC_ID_AC3:
2214  case AV_CODEC_ID_EAC3:
2216  case AV_CODEC_ID_VC1:
2217  case AV_CODEC_ID_VP9:
2219  break;
2220  default:
2221  break;
2222  }
2223  return 0;
2224 }
2225 
2227  int codec_tag, int format,
2228  int64_t size)
2229 {
2230  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2231 
2232  if (codec_tag &&
2233  (codec_tag != format &&
2234  // AVID 1:1 samples with differing data format and codec tag exist
2235  (codec_tag != AV_RL32("AV1x") || format != AV_RL32("AVup")) &&
2236  // prores is allowed to have differing data format and codec tag
2237  codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
2238  // so is dv (sigh)
2239  codec_tag != AV_RL32("dvpp") && codec_tag != AV_RL32("dvcp") &&
2240  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2241  : codec_tag != MKTAG('j','p','e','g')))) {
2242  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2243  * export it as a separate AVStream but this needs a few changes
2244  * in the MOV demuxer, patch welcome. */
2245 
2246  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2247  avio_skip(pb, size);
2248  return 1;
2249  }
2250 
2251  return 0;
2252 }
2253 
2255 {
2256  AVStream *st;
2257  MOVStreamContext *sc;
2258  int pseudo_stream_id;
2259 
2260  if (c->fc->nb_streams < 1)
2261  return 0;
2262  st = c->fc->streams[c->fc->nb_streams-1];
2263  sc = st->priv_data;
2264 
2265  for (pseudo_stream_id = 0;
2266  pseudo_stream_id < entries && !pb->eof_reached;
2267  pseudo_stream_id++) {
2268  //Parsing Sample description table
2269  enum AVCodecID id;
2270  int ret, dref_id = 1;
2271  MOVAtom a = { AV_RL32("stsd") };
2272  int64_t start_pos = avio_tell(pb);
2273  int64_t size = avio_rb32(pb); /* size */
2274  uint32_t format = avio_rl32(pb); /* data format */
2275 
2276  if (size >= 16) {
2277  avio_rb32(pb); /* reserved */
2278  avio_rb16(pb); /* reserved */
2279  dref_id = avio_rb16(pb);
2280  } else if (size <= 7) {
2281  av_log(c->fc, AV_LOG_ERROR,
2282  "invalid size %"PRId64" in stsd\n", size);
2283  return AVERROR_INVALIDDATA;
2284  }
2285 
2286  if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2287  size - (avio_tell(pb) - start_pos)))
2288  continue;
2289 
2290  sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2291  sc->dref_id= dref_id;
2292  sc->format = format;
2293 
2294  id = mov_codec_id(st, format);
2295 
2296  av_log(c->fc, AV_LOG_TRACE,
2297  "size=%"PRId64" 4CC=%s codec_type=%d\n", size,
2298  av_fourcc2str(format), st->codecpar->codec_type);
2299 
2301  st->codecpar->codec_id = id;
2302  mov_parse_stsd_video(c, pb, st, sc);
2303  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2304  st->codecpar->codec_id = id;
2305  mov_parse_stsd_audio(c, pb, st, sc);
2306  if (st->codecpar->sample_rate < 0) {
2307  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
2308  return AVERROR_INVALIDDATA;
2309  }
2310  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2311  st->codecpar->codec_id = id;
2312  mov_parse_stsd_subtitle(c, pb, st, sc,
2313  size - (avio_tell(pb) - start_pos));
2314  } else {
2315  ret = mov_parse_stsd_data(c, pb, st, sc,
2316  size - (avio_tell(pb) - start_pos));
2317  if (ret < 0)
2318  return ret;
2319  }
2320  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2321  a.size = size - (avio_tell(pb) - start_pos);
2322  if (a.size > 8) {
2323  if ((ret = mov_read_default(c, pb, a)) < 0)
2324  return ret;
2325  } else if (a.size > 0)
2326  avio_skip(pb, a.size);
2327 
2328  if (sc->extradata && st->codecpar->extradata) {
2329  int extra_size = st->codecpar->extradata_size;
2330 
2331  /* Move the current stream extradata to the stream context one. */
2332  sc->extradata_size[pseudo_stream_id] = extra_size;
2333  sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
2334  if (!sc->extradata[pseudo_stream_id])
2335  return AVERROR(ENOMEM);
2336  memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
2337  av_freep(&st->codecpar->extradata);
2338  st->codecpar->extradata_size = 0;
2339  }
2340  }
2341 
2342  if (pb->eof_reached)
2343  return AVERROR_EOF;
2344 
2345  return 0;
2346 }
2347 
2349 {
2350  AVStream *st;
2351  MOVStreamContext *sc;
2352  int ret, entries;
2353 
2354  if (c->fc->nb_streams < 1)
2355  return 0;
2356  st = c->fc->streams[c->fc->nb_streams - 1];
2357  sc = st->priv_data;
2358 
2359  avio_r8(pb); /* version */
2360  avio_rb24(pb); /* flags */
2361  entries = avio_rb32(pb);
2362 
2363  if (entries <= 0) {
2364  av_log(c->fc, AV_LOG_ERROR, "invalid STSD entries %d\n", entries);
2365  return AVERROR_INVALIDDATA;
2366  }
2367 
2368  if (sc->extradata) {
2369  av_log(c->fc, AV_LOG_ERROR, "Duplicate STSD\n");
2370  return AVERROR_INVALIDDATA;
2371  }
2372  /* Prepare space for hosting multiple extradata. */
2373  sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
2374  sc->extradata_size = av_mallocz_array(entries, sizeof(*sc->extradata_size));
2375  if (!sc->extradata_size || !sc->extradata) {
2376  ret = AVERROR(ENOMEM);
2377  goto fail;
2378  }
2379 
2380  ret = ff_mov_read_stsd_entries(c, pb, entries);
2381  if (ret < 0)
2382  return ret;
2383 
2384  sc->stsd_count = entries;
2385 
2386  /* Restore back the primary extradata. */
2387  av_freep(&st->codecpar->extradata);
2388  st->codecpar->extradata_size = sc->extradata_size[0];
2389  if (sc->extradata_size[0]) {
2391  if (!st->codecpar->extradata)
2392  return AVERROR(ENOMEM);
2393  memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
2394  }
2395 
2396  return mov_finalize_stsd_codec(c, pb, st, sc);
2397 fail:
2398  av_freep(&sc->extradata);
2399  av_freep(&sc->extradata_size);
2400  return ret;
2401 }
2402 
2404 {
2405  AVStream *st;
2406  MOVStreamContext *sc;
2407  unsigned int i, entries;
2408 
2409  if (c->fc->nb_streams < 1)
2410  return 0;
2411  st = c->fc->streams[c->fc->nb_streams-1];
2412  sc = st->priv_data;
2413 
2414  avio_r8(pb); /* version */
2415  avio_rb24(pb); /* flags */
2416 
2417  entries = avio_rb32(pb);
2418 
2419  av_log(c->fc, AV_LOG_TRACE, "track[%u].stsc.entries = %u\n", c->fc->nb_streams - 1, entries);
2420 
2421  if (!entries)
2422  return 0;
2423  if (sc->stsc_data)
2424  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2425  av_free(sc->stsc_data);
2426  sc->stsc_count = 0;
2427  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2428  if (!sc->stsc_data)
2429  return AVERROR(ENOMEM);
2430 
2431  for (i = 0; i < entries && !pb->eof_reached; i++) {
2432  sc->stsc_data[i].first = avio_rb32(pb);
2433  sc->stsc_data[i].count = avio_rb32(pb);
2434  sc->stsc_data[i].id = avio_rb32(pb);
2435  }
2436 
2437  sc->stsc_count = i;
2438 
2439  if (pb->eof_reached)
2440  return AVERROR_EOF;
2441 
2442  return 0;
2443 }
2444 
2445 #define mov_stsc_index_valid(index, count) ((index) < (count) - 1)
2446 
2447 /* Compute the samples value for the stsc entry at the given index. */
2448 static inline int mov_get_stsc_samples(MOVStreamContext *sc, int index)
2449 {
2450  int chunk_count;
2451 
2452  if (mov_stsc_index_valid(index, sc->stsc_count))
2453  chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2454  else
2455  chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2456 
2457  return sc->stsc_data[index].count * chunk_count;
2458 }
2459 
2461 {
2462  AVStream *st;
2463  MOVStreamContext *sc;
2464  unsigned i, entries;
2465 
2466  if (c->fc->nb_streams < 1)
2467  return 0;
2468  st = c->fc->streams[c->fc->nb_streams-1];
2469  sc = st->priv_data;
2470 
2471  avio_rb32(pb); // version + flags
2472 
2473  entries = avio_rb32(pb);
2474  if (sc->stps_data)
2475  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2476  av_free(sc->stps_data);
2477  sc->stps_count = 0;
2478  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2479  if (!sc->stps_data)
2480  return AVERROR(ENOMEM);
2481 
2482  for (i = 0; i < entries && !pb->eof_reached; i++) {
2483  sc->stps_data[i] = avio_rb32(pb);
2484  }
2485 
2486  sc->stps_count = i;
2487 
2488  if (pb->eof_reached)
2489  return AVERROR_EOF;
2490 
2491  return 0;
2492 }
2493 
2495 {
2496  AVStream *st;
2497  MOVStreamContext *sc;
2498  unsigned int i, entries;
2499 
2500  if (c->fc->nb_streams < 1)
2501  return 0;
2502  st = c->fc->streams[c->fc->nb_streams-1];
2503  sc = st->priv_data;
2504 
2505  avio_r8(pb); /* version */
2506  avio_rb24(pb); /* flags */
2507 
2508  entries = avio_rb32(pb);
2509 
2510  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %u\n", entries);
2511 
2512  if (!entries)
2513  {
2514  sc->keyframe_absent = 1;
2515  if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2517  return 0;
2518  }
2519  if (sc->keyframes)
2520  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2521  if (entries >= UINT_MAX / sizeof(int))
2522  return AVERROR_INVALIDDATA;
2523  av_freep(&sc->keyframes);
2524  sc->keyframe_count = 0;
2525  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2526  if (!sc->keyframes)
2527  return AVERROR(ENOMEM);
2528 
2529  for (i = 0; i < entries && !pb->eof_reached; i++) {
2530  sc->keyframes[i] = avio_rb32(pb);
2531  }
2532 
2533  sc->keyframe_count = i;
2534 
2535  if (pb->eof_reached)
2536  return AVERROR_EOF;
2537 
2538  return 0;
2539 }
2540 
2542 {
2543  AVStream *st;
2544  MOVStreamContext *sc;
2545  unsigned int i, entries, sample_size, field_size, num_bytes;
2546  GetBitContext gb;
2547  unsigned char* buf;
2548  int ret;
2549 
2550  if (c->fc->nb_streams < 1)
2551  return 0;
2552  st = c->fc->streams[c->fc->nb_streams-1];
2553  sc = st->priv_data;
2554 
2555  avio_r8(pb); /* version */
2556  avio_rb24(pb); /* flags */
2557 
2558  if (atom.type == MKTAG('s','t','s','z')) {
2559  sample_size = avio_rb32(pb);
2560  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2561  sc->sample_size = sample_size;
2562  sc->stsz_sample_size = sample_size;
2563  field_size = 32;
2564  } else {
2565  sample_size = 0;
2566  avio_rb24(pb); /* reserved */
2567  field_size = avio_r8(pb);
2568  }
2569  entries = avio_rb32(pb);
2570 
2571  av_log(c->fc, AV_LOG_TRACE, "sample_size = %u sample_count = %u\n", sc->sample_size, entries);
2572 
2573  sc->sample_count = entries;
2574  if (sample_size)
2575  return 0;
2576 
2577  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2578  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %u\n", field_size);
2579  return AVERROR_INVALIDDATA;
2580  }
2581 
2582  if (!entries)
2583  return 0;
2584  if (entries >= (UINT_MAX - 4) / field_size)
2585  return AVERROR_INVALIDDATA;
2586  if (sc->sample_sizes)
2587  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2588  av_free(sc->sample_sizes);
2589  sc->sample_count = 0;
2590  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2591  if (!sc->sample_sizes)
2592  return AVERROR(ENOMEM);
2593 
2594  num_bytes = (entries*field_size+4)>>3;
2595 
2596  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2597  if (!buf) {
2598  av_freep(&sc->sample_sizes);
2599  return AVERROR(ENOMEM);
2600  }
2601 
2602  ret = ffio_read_size(pb, buf, num_bytes);
2603  if (ret < 0) {
2604  av_freep(&sc->sample_sizes);
2605  av_free(buf);
2606  return ret;
2607  }
2608 
2609  init_get_bits(&gb, buf, 8*num_bytes);
2610 
2611  for (i = 0; i < entries && !pb->eof_reached; i++) {
2612  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2613  sc->data_size += sc->sample_sizes[i];
2614  }
2615 
2616  sc->sample_count = i;
2617 
2618  av_free(buf);
2619 
2620  if (pb->eof_reached)
2621  return AVERROR_EOF;
2622 
2623  return 0;
2624 }
2625 
2627 {
2628  AVStream *st;
2629  MOVStreamContext *sc;
2630  unsigned int i, entries;
2631  int64_t duration=0;
2632  int64_t total_sample_count=0;
2633 
2634  if (c->fc->nb_streams < 1)
2635  return 0;
2636  st = c->fc->streams[c->fc->nb_streams-1];
2637  sc = st->priv_data;
2638 
2639  avio_r8(pb); /* version */
2640  avio_rb24(pb); /* flags */
2641  entries = avio_rb32(pb);
2642 
2643  av_log(c->fc, AV_LOG_TRACE, "track[%u].stts.entries = %u\n",
2644  c->fc->nb_streams-1, entries);
2645 
2646  if (sc->stts_data)
2647  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2648  av_free(sc->stts_data);
2649  sc->stts_count = 0;
2650  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2651  if (!sc->stts_data)
2652  return AVERROR(ENOMEM);
2653 
2654  for (i = 0; i < entries && !pb->eof_reached; i++) {
2655  int sample_duration;
2656  int sample_count;
2657 
2658  sample_count=avio_rb32(pb);
2659  sample_duration = avio_rb32(pb);
2660 
2661  if (sample_count < 0) {
2662  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2663  return AVERROR_INVALIDDATA;
2664  }
2665  sc->stts_data[i].count= sample_count;
2666  sc->stts_data[i].duration= sample_duration;
2667 
2668  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2669  sample_count, sample_duration);
2670 
2671  if ( i+1 == entries
2672  && i
2673  && sample_count == 1
2674  && total_sample_count > 100
2675  && sample_duration/10 > duration / total_sample_count)
2676  sample_duration = duration / total_sample_count;
2677  duration+=(int64_t)sample_duration*sample_count;
2678  total_sample_count+=sample_count;
2679  }
2680 
2681  sc->stts_count = i;
2682 
2683  sc->duration_for_fps += duration;
2684  sc->nb_frames_for_fps += total_sample_count;
2685 
2686  if (pb->eof_reached)
2687  return AVERROR_EOF;
2688 
2689  st->nb_frames= total_sample_count;
2690  if (duration)
2691  st->duration= duration;
2692  sc->track_end = duration;
2693  return 0;
2694 }
2695 
2697 {
2698  if (duration < 0) {
2699  if (duration == INT_MIN) {
2700  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2701  duration++;
2702  }
2703  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2704  }
2705 }
2706 
2708 {
2709  AVStream *st;
2710  MOVStreamContext *sc;
2711  unsigned int i, entries, ctts_count = 0;
2712 
2713  if (c->fc->nb_streams < 1)
2714  return 0;
2715  st = c->fc->streams[c->fc->nb_streams-1];
2716  sc = st->priv_data;
2717 
2718  avio_r8(pb); /* version */
2719  avio_rb24(pb); /* flags */
2720  entries = avio_rb32(pb);
2721 
2722  av_log(c->fc, AV_LOG_TRACE, "track[%u].ctts.entries = %u\n", c->fc->nb_streams - 1, entries);
2723 
2724  if (!entries)
2725  return 0;
2726  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2727  return AVERROR_INVALIDDATA;
2728  av_freep(&sc->ctts_data);
2729  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2730  if (!sc->ctts_data)
2731  return AVERROR(ENOMEM);
2732 
2733  for (i = 0; i < entries && !pb->eof_reached; i++) {
2734  int count =avio_rb32(pb);
2735  int duration =avio_rb32(pb);
2736 
2737  if (count <= 0) {
2738  av_log(c->fc, AV_LOG_TRACE,
2739  "ignoring CTTS entry with count=%d duration=%d\n",
2740  count, duration);
2741  continue;
2742  }
2743 
2744  sc->ctts_data[ctts_count].count = count;
2745  sc->ctts_data[ctts_count].duration = duration;
2746  ctts_count++;
2747 
2748  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2749  count, duration);
2750 
2751  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2752  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2753  av_freep(&sc->ctts_data);
2754  sc->ctts_count = 0;
2755  return 0;
2756  }
2757 
2758  if (i+2<entries)
2759  mov_update_dts_shift(sc, duration);
2760  }
2761 
2762  sc->ctts_count = ctts_count;
2763 
2764  if (pb->eof_reached)
2765  return AVERROR_EOF;
2766 
2767  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2768 
2769  return 0;
2770 }
2771 
2773 {
2774  AVStream *st;
2775  MOVStreamContext *sc;
2776  unsigned int i, entries;
2777  uint8_t version;
2778  uint32_t grouping_type;
2779 
2780  if (c->fc->nb_streams < 1)
2781  return 0;
2782  st = c->fc->streams[c->fc->nb_streams-1];
2783  sc = st->priv_data;
2784 
2785  version = avio_r8(pb); /* version */
2786  avio_rb24(pb); /* flags */
2787  grouping_type = avio_rl32(pb);
2788  if (grouping_type != MKTAG( 'r','a','p',' '))
2789  return 0; /* only support 'rap ' grouping */
2790  if (version == 1)
2791  avio_rb32(pb); /* grouping_type_parameter */
2792 
2793  entries = avio_rb32(pb);
2794  if (!entries)
2795  return 0;
2796  if (sc->rap_group)
2797  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2798  av_free(sc->rap_group);
2799  sc->rap_group_count = 0;
2800  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2801  if (!sc->rap_group)
2802  return AVERROR(ENOMEM);
2803 
2804  for (i = 0; i < entries && !pb->eof_reached; i++) {
2805  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2806  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2807  }
2808 
2809  sc->rap_group_count = i;
2810 
2811  return pb->eof_reached ? AVERROR_EOF : 0;
2812 }
2813 
2814 /**
2815  * Get ith edit list entry (media time, duration).
2816  */
2818  const MOVStreamContext *msc,
2819  unsigned int edit_list_index,
2820  int64_t *edit_list_media_time,
2821  int64_t *edit_list_duration,
2822  int64_t global_timescale)
2823 {
2824  if (edit_list_index == msc->elst_count) {
2825  return 0;
2826  }
2827  *edit_list_media_time = msc->elst_data[edit_list_index].time;
2828  *edit_list_duration = msc->elst_data[edit_list_index].duration;
2829 
2830  /* duration is in global timescale units;convert to msc timescale */
2831  if (global_timescale == 0) {
2832  avpriv_request_sample(mov->fc, "Support for mvhd.timescale = 0 with editlists");
2833  return 0;
2834  }
2835  *edit_list_duration = av_rescale(*edit_list_duration, msc->time_scale,
2836  global_timescale);
2837  return 1;
2838 }
2839 
2840 /**
2841  * Find the closest previous frame to the timestamp, in e_old index
2842  * entries. Searching for just any frame / just key frames can be controlled by
2843  * last argument 'flag'.
2844  * Returns the index of the entry in st->index_entries if successful,
2845  * else returns -1.
2846  */
2848  AVIndexEntry *e_old,
2849  int nb_old,
2850  int64_t timestamp,
2851  int flag)
2852 {
2853  AVIndexEntry *e_keep = st->index_entries;
2854  int nb_keep = st->nb_index_entries;
2855  int64_t found = -1;
2856  int64_t i = 0;
2857 
2858  st->index_entries = e_old;
2859  st->nb_index_entries = nb_old;
2860  found = av_index_search_timestamp(st, timestamp, flag | AVSEEK_FLAG_BACKWARD);
2861 
2862  // Keep going backwards in the index entries until the timestamp is the same.
2863  if (found >= 0) {
2864  for (i = found; i > 0 && e_old[i].timestamp == e_old[i - 1].timestamp;
2865  i--) {
2866  if ((flag & AVSEEK_FLAG_ANY) ||
2867  (e_old[i - 1].flags & AVINDEX_KEYFRAME)) {
2868  found = i - 1;
2869  }
2870  }
2871  }
2872 
2873  /* restore AVStream state*/
2874  st->index_entries = e_keep;
2875  st->nb_index_entries = nb_keep;
2876  return found;
2877 }
2878 
2879 /**
2880  * Add index entry with the given values, to the end of st->index_entries.
2881  * Returns the new size st->index_entries if successful, else returns -1.
2882  *
2883  * This function is similar to ff_add_index_entry in libavformat/utils.c
2884  * except that here we are always unconditionally adding an index entry to
2885  * the end, instead of searching the entries list and skipping the add if
2886  * there is an existing entry with the same timestamp.
2887  * This is needed because the mov_fix_index calls this func with the same
2888  * unincremented timestamp for successive discarded frames.
2889  */
2890 static int64_t add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2891  int size, int distance, int flags)
2892 {
2893  AVIndexEntry *entries, *ie;
2894  int64_t index = -1;
2895  const size_t min_size_needed = (st->nb_index_entries + 1) * sizeof(AVIndexEntry);
2896 
2897  // Double the allocation each time, to lower memory fragmentation.
2898  // Another difference from ff_add_index_entry function.
2899  const size_t requested_size =
2900  min_size_needed > st->index_entries_allocated_size ?
2901  FFMAX(min_size_needed, 2 * st->index_entries_allocated_size) :
2902  min_size_needed;
2903 
2904  if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
2905  return -1;
2906 
2907  entries = av_fast_realloc(st->index_entries,
2909  requested_size);
2910  if(!entries)
2911  return -1;
2912 
2913  st->index_entries= entries;
2914 
2915  index= st->nb_index_entries++;
2916  ie= &entries[index];
2917 
2918  ie->pos = pos;
2919  ie->timestamp = timestamp;
2920  ie->min_distance= distance;
2921  ie->size= size;
2922  ie->flags = flags;
2923  return index;
2924 }
2925 
2926 /**
2927  * Rewrite timestamps of index entries in the range [end_index - frame_duration_buffer_size, end_index)
2928  * by subtracting end_ts successively by the amounts given in frame_duration_buffer.
2929  */
2930 static void fix_index_entry_timestamps(AVStream* st, int end_index, int64_t end_ts,
2931  int64_t* frame_duration_buffer,
2932  int frame_duration_buffer_size) {
2933  int i = 0;
2934  av_assert0(end_index >= 0 && end_index <= st->nb_index_entries);
2935  for (i = 0; i < frame_duration_buffer_size; i++) {
2936  end_ts -= frame_duration_buffer[frame_duration_buffer_size - 1 - i];
2937  st->index_entries[end_index - 1 - i].timestamp = end_ts;
2938  }
2939 }
2940 
2941 /**
2942  * Append a new ctts entry to ctts_data.
2943  * Returns the new ctts_count if successful, else returns -1.
2944  */
2945 static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
2946  int count, int duration)
2947 {
2948  MOVStts *ctts_buf_new;
2949  const size_t min_size_needed = (*ctts_count + 1) * sizeof(MOVStts);
2950  const size_t requested_size =
2951  min_size_needed > *allocated_size ?
2952  FFMAX(min_size_needed, 2 * (*allocated_size)) :
2953  min_size_needed;
2954 
2955  if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts))
2956  return -1;
2957 
2958  ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);
2959 
2960  if(!ctts_buf_new)
2961  return -1;
2962 
2963  *ctts_data = ctts_buf_new;
2964 
2965  ctts_buf_new[*ctts_count].count = count;
2966  ctts_buf_new[*ctts_count].duration = duration;
2967 
2968  *ctts_count = (*ctts_count) + 1;
2969  return *ctts_count;
2970 }
2971 
2973 {
2974  sc->current_sample++;
2975  sc->current_index++;
2976  if (sc->index_ranges &&
2977  sc->current_index >= sc->current_index_range->end &&
2978  sc->current_index_range->end) {
2979  sc->current_index_range++;
2981  }
2982 }
2983 
2985 {
2986  sc->current_sample--;
2987  sc->current_index--;
2988  if (sc->index_ranges &&
2990  sc->current_index_range > sc->index_ranges) {
2991  sc->current_index_range--;
2992  sc->current_index = sc->current_index_range->end - 1;
2993  }
2994 }
2995 
2996 static void mov_current_sample_set(MOVStreamContext *sc, int current_sample)
2997 {
2998  int64_t range_size;
2999 
3000  sc->current_sample = current_sample;
3001  sc->current_index = current_sample;
3002  if (!sc->index_ranges) {
3003  return;
3004  }
3005 
3006  for (sc->current_index_range = sc->index_ranges;
3007  sc->current_index_range->end;
3008  sc->current_index_range++) {
3009  range_size = sc->current_index_range->end - sc->current_index_range->start;
3010  if (range_size > current_sample) {
3011  sc->current_index = sc->current_index_range->start + current_sample;
3012  break;
3013  }
3014  current_sample -= range_size;
3015  }
3016 }
3017 
3018 /**
3019  * Fix st->index_entries, so that it contains only the entries (and the entries
3020  * which are needed to decode them) that fall in the edit list time ranges.
3021  * Also fixes the timestamps of the index entries to match the timeline
3022  * specified the edit lists.
3023  */
3024 static void mov_fix_index(MOVContext *mov, AVStream *st)
3025 {
3026  MOVStreamContext *msc = st->priv_data;
3027  AVIndexEntry *e_old = st->index_entries;
3028  int nb_old = st->nb_index_entries;
3029  const AVIndexEntry *e_old_end = e_old + nb_old;
3030  const AVIndexEntry *current = NULL;
3031  MOVStts *ctts_data_old = msc->ctts_data;
3032  int64_t ctts_index_old = 0;
3033  int64_t ctts_sample_old = 0;
3034  int64_t ctts_count_old = msc->ctts_count;
3035  int64_t edit_list_media_time = 0;
3036  int64_t edit_list_duration = 0;
3037  int64_t frame_duration = 0;
3038  int64_t edit_list_dts_counter = 0;
3039  int64_t edit_list_dts_entry_end = 0;
3040  int64_t edit_list_start_ctts_sample = 0;
3041  int64_t curr_cts;
3042  int64_t curr_ctts = 0;
3043  int64_t min_corrected_pts = -1;
3044  int64_t empty_edits_sum_duration = 0;
3045  int64_t edit_list_index = 0;
3046  int64_t index;
3047  int64_t index_ctts_count;
3048  int flags;
3049  unsigned int ctts_allocated_size = 0;
3050  int64_t start_dts = 0;
3051  int64_t edit_list_media_time_dts = 0;
3052  int64_t edit_list_start_encountered = 0;
3053  int64_t search_timestamp = 0;
3054  int64_t* frame_duration_buffer = NULL;
3055  int num_discarded_begin = 0;
3056  int first_non_zero_audio_edit = -1;
3057  int packet_skip_samples = 0;
3058  MOVIndexRange *current_index_range;
3059  int i;
3060 
3061  if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
3062  return;
3063  }
3064 
3065  // allocate the index ranges array
3066  msc->index_ranges = av_malloc((msc->elst_count + 1) * sizeof(msc->index_ranges[0]));
3067  if (!msc->index_ranges) {
3068  av_log(mov->fc, AV_LOG_ERROR, "Cannot allocate index ranges buffer\n");
3069  return;
3070  }
3071  msc->current_index_range = msc->index_ranges;
3072  current_index_range = msc->index_ranges - 1;
3073 
3074  // Clean AVStream from traces of old index
3075  st->index_entries = NULL;
3077  st->nb_index_entries = 0;
3078 
3079  // Clean ctts fields of MOVStreamContext
3080  msc->ctts_data = NULL;
3081  msc->ctts_count = 0;
3082  msc->ctts_index = 0;
3083  msc->ctts_sample = 0;
3084 
3085  // If the dts_shift is positive (in case of negative ctts values in mov),
3086  // then negate the DTS by dts_shift
3087  if (msc->dts_shift > 0) {
3088  edit_list_dts_entry_end -= msc->dts_shift;
3089  av_log(mov->fc, AV_LOG_DEBUG, "Shifting DTS by %d because of negative CTTS.\n", msc->dts_shift);
3090  }
3091 
3092  start_dts = edit_list_dts_entry_end;
3093 
3094  while (get_edit_list_entry(mov, msc, edit_list_index, &edit_list_media_time,
3095  &edit_list_duration, mov->time_scale)) {
3096  av_log(mov->fc, AV_LOG_DEBUG, "Processing st: %d, edit list %"PRId64" - media time: %"PRId64", duration: %"PRId64"\n",
3097  st->index, edit_list_index, edit_list_media_time, edit_list_duration);
3098  edit_list_index++;
3099  edit_list_dts_counter = edit_list_dts_entry_end;
3100  edit_list_dts_entry_end += edit_list_duration;
3101  num_discarded_begin = 0;
3102  if (edit_list_media_time == -1) {
3103  empty_edits_sum_duration += edit_list_duration;
3104  continue;
3105  }
3106 
3107  // If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
3108  // according to the edit list below.
3109  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3110  if (first_non_zero_audio_edit < 0) {
3111  first_non_zero_audio_edit = 1;
3112  } else {
3113  first_non_zero_audio_edit = 0;
3114  }
3115 
3116  if (first_non_zero_audio_edit > 0)
3117  st->skip_samples = msc->start_pad = 0;
3118  }
3119 
3120  //find closest previous key frame
3121  edit_list_media_time_dts = edit_list_media_time;
3122  if (msc->dts_shift > 0) {
3123  edit_list_media_time_dts -= msc->dts_shift;
3124  }
3125 
3126  // While reordering frame index according to edit list we must handle properly
3127  // the scenario when edit list entry starts from none key frame.
3128  // We find closest previous key frame and preserve it and consequent frames in index.
3129  // All frames which are outside edit list entry time boundaries will be dropped after decoding.
3130  search_timestamp = edit_list_media_time_dts;
3131  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3132  // Audio decoders like AAC need need a decoder delay samples previous to the current sample,
3133  // to correctly decode this frame. Hence for audio we seek to a frame 1 sec. before the
3134  // edit_list_media_time to cover the decoder delay.
3135  search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
3136  }
3137 
3138  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, 0);
3139  if (index == -1) {
3140  av_log(mov->fc, AV_LOG_WARNING,
3141  "st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
3142  st->index, edit_list_index, search_timestamp);
3143  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, AVSEEK_FLAG_ANY);
3144 
3145  if (index == -1) {
3146  av_log(mov->fc, AV_LOG_WARNING,
3147  "st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n"
3148  "Rounding edit list media time to zero.\n",
3149  st->index, edit_list_index, search_timestamp);
3150  index = 0;
3151  edit_list_media_time = 0;
3152  }
3153  }
3154  current = e_old + index;
3155 
3156  ctts_index_old = 0;
3157  ctts_sample_old = 0;
3158 
3159  // set ctts_index properly for the found key frame
3160  for (index_ctts_count = 0; index_ctts_count < index; index_ctts_count++) {
3161  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3162  ctts_sample_old++;
3163  if (ctts_data_old[ctts_index_old].count == ctts_sample_old) {
3164  ctts_index_old++;
3165  ctts_sample_old = 0;
3166  }
3167  }
3168  }
3169 
3170  edit_list_start_ctts_sample = ctts_sample_old;
3171 
3172  // Iterate over index and arrange it according to edit list
3173  edit_list_start_encountered = 0;
3174  for (; current < e_old_end; current++, index++) {
3175  // check if frame outside edit list mark it for discard
3176  frame_duration = (current + 1 < e_old_end) ?
3177  ((current + 1)->timestamp - current->timestamp) : edit_list_duration;
3178 
3179  flags = current->flags;
3180 
3181  // frames (pts) before or after edit list
3182  curr_cts = current->timestamp + msc->dts_shift;
3183  curr_ctts = 0;
3184 
3185  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3186  curr_ctts = ctts_data_old[ctts_index_old].duration;
3187  av_log(mov->fc, AV_LOG_DEBUG, "stts: %"PRId64" ctts: %"PRId64", ctts_index: %"PRId64", ctts_count: %"PRId64"\n",
3188  curr_cts, curr_ctts, ctts_index_old, ctts_count_old);
3189  curr_cts += curr_ctts;
3190  ctts_sample_old++;
3191  if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
3192  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3193  &ctts_allocated_size,
3194  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3195  ctts_data_old[ctts_index_old].duration) == -1) {
3196  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3197  ctts_index_old,
3198  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3199  ctts_data_old[ctts_index_old].duration);
3200  break;
3201  }
3202  ctts_index_old++;
3203  ctts_sample_old = 0;
3204  edit_list_start_ctts_sample = 0;
3205  }
3206  }
3207 
3208  if (curr_cts < edit_list_media_time || curr_cts >= (edit_list_duration + edit_list_media_time)) {
3210  curr_cts < edit_list_media_time && curr_cts + frame_duration > edit_list_media_time &&
3211  first_non_zero_audio_edit > 0) {
3212  packet_skip_samples = edit_list_media_time - curr_cts;
3213  st->skip_samples += packet_skip_samples;
3214 
3215  // Shift the index entry timestamp by packet_skip_samples to be correct.
3216  edit_list_dts_counter -= packet_skip_samples;
3217  if (edit_list_start_encountered == 0) {
3218  edit_list_start_encountered = 1;
3219  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3220  // discarded packets.
3221  if (frame_duration_buffer) {
3222  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3223  frame_duration_buffer, num_discarded_begin);
3224  av_freep(&frame_duration_buffer);
3225  }
3226  }
3227 
3228  av_log(mov->fc, AV_LOG_DEBUG, "skip %d audio samples from curr_cts: %"PRId64"\n", packet_skip_samples, curr_cts);
3229  } else {
3230  flags |= AVINDEX_DISCARD_FRAME;
3231  av_log(mov->fc, AV_LOG_DEBUG, "drop a frame at curr_cts: %"PRId64" @ %"PRId64"\n", curr_cts, index);
3232 
3233  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && edit_list_start_encountered == 0) {
3234  num_discarded_begin++;
3235  frame_duration_buffer = av_realloc(frame_duration_buffer,
3236  num_discarded_begin * sizeof(int64_t));
3237  if (!frame_duration_buffer) {
3238  av_log(mov->fc, AV_LOG_ERROR, "Cannot reallocate frame duration buffer\n");
3239  break;
3240  }
3241  frame_duration_buffer[num_discarded_begin - 1] = frame_duration;
3242 
3243  // Increment skip_samples for the first non-zero audio edit list
3244  if (first_non_zero_audio_edit > 0 && st->codecpar->codec_id != AV_CODEC_ID_VORBIS) {
3245  st->skip_samples += frame_duration;
3246  msc->start_pad = st->skip_samples;
3247  }
3248  }
3249  }
3250  } else {
3251  if (min_corrected_pts < 0) {
3252  min_corrected_pts = edit_list_dts_counter + curr_ctts + msc->dts_shift;
3253  } else {
3254  min_corrected_pts = FFMIN(min_corrected_pts, edit_list_dts_counter + curr_ctts + msc->dts_shift);
3255  }
3256  if (edit_list_start_encountered == 0) {
3257  edit_list_start_encountered = 1;
3258  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3259  // discarded packets.
3260  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && frame_duration_buffer) {
3261  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3262  frame_duration_buffer, num_discarded_begin);
3263  av_freep(&frame_duration_buffer);
3264  }
3265  }
3266  }
3267 
3268  if (add_index_entry(st, current->pos, edit_list_dts_counter, current->size,
3269  current->min_distance, flags) == -1) {
3270  av_log(mov->fc, AV_LOG_ERROR, "Cannot add index entry\n");
3271  break;
3272  }
3273 
3274  // Update the index ranges array
3275  if (current_index_range < msc->index_ranges || index != current_index_range->end) {
3276  current_index_range++;
3277  current_index_range->start = index;
3278  }
3279  current_index_range->end = index + 1;
3280 
3281  // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list.
3282  if (edit_list_start_encountered > 0) {
3283  edit_list_dts_counter = edit_list_dts_counter + frame_duration;
3284  }
3285 
3286  // Break when found first key frame after edit entry completion
3287  if (((curr_cts + frame_duration) >= (edit_list_duration + edit_list_media_time)) &&
3288  ((flags & AVINDEX_KEYFRAME) || ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)))) {
3289 
3290  if (ctts_data_old && ctts_sample_old != 0) {
3291  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3292  &ctts_allocated_size,
3293  ctts_sample_old - edit_list_start_ctts_sample,
3294  ctts_data_old[ctts_index_old].duration) == -1) {
3295  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3296  ctts_index_old, ctts_sample_old - edit_list_start_ctts_sample,
3297  ctts_data_old[ctts_index_old].duration);
3298  break;
3299  }
3300  }
3301  break;
3302  }
3303  }
3304  }
3305  // If there are empty edits, then min_corrected_pts might be positive intentionally. So we subtract the
3306  // sum duration of emtpy edits here.
3307  min_corrected_pts -= empty_edits_sum_duration;
3308 
3309  // If the minimum pts turns out to be greater than zero after fixing the index, then we subtract the
3310  // dts by that amount to make the first pts zero.
3311  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && min_corrected_pts > 0) {
3312  av_log(mov->fc, AV_LOG_DEBUG, "Offset DTS by %"PRId64" to make first pts zero.\n", min_corrected_pts);
3313  for (i = 0; i < st->nb_index_entries; ++i) {
3314  st->index_entries[i].timestamp -= min_corrected_pts;
3315  }
3316  }
3317 
3318  // Update av stream length
3319  st->duration = edit_list_dts_entry_end - start_dts;
3320 
3321  // Free the old index and the old CTTS structures
3322  av_free(e_old);
3323  av_free(ctts_data_old);
3324 
3325  // Null terminate the index ranges array
3326  current_index_range++;
3327  current_index_range->start = 0;
3328  current_index_range->end = 0;
3329  msc->current_index = msc->index_ranges[0].start;
3330 }
3331 
3332 static void mov_build_index(MOVContext *mov, AVStream *st)
3333 {
3334  MOVStreamContext *sc = st->priv_data;
3335  int64_t current_offset;
3336  int64_t current_dts = 0;
3337  unsigned int stts_index = 0;
3338  unsigned int stsc_index = 0;
3339  unsigned int stss_index = 0;
3340  unsigned int stps_index = 0;
3341  unsigned int i, j;
3342  uint64_t stream_size = 0;
3343 
3344  if (sc->elst_count) {
3345  int i, edit_start_index = 0, multiple_edits = 0;
3346  int64_t empty_duration = 0; // empty duration of the first edit list entry
3347  int64_t start_time = 0; // start time of the media
3348 
3349  for (i = 0; i < sc->elst_count; i++) {
3350  const MOVElst *e = &sc->elst_data[i];
3351  if (i == 0 && e->time == -1) {
3352  /* if empty, the first entry is the start time of the stream
3353  * relative to the presentation itself */
3354  empty_duration = e->duration;
3355  edit_start_index = 1;
3356  } else if (i == edit_start_index && e->time >= 0) {
3357  start_time = e->time;
3358  } else {
3359  multiple_edits = 1;
3360  }
3361  }
3362 
3363  if (multiple_edits && !mov->advanced_editlist)
3364  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
3365  "Use -advanced_editlist to correctly decode otherwise "
3366  "a/v desync might occur\n");
3367 
3368  /* adjust first dts according to edit list */
3369  if ((empty_duration || start_time) && mov->time_scale > 0) {
3370  if (empty_duration)
3371  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
3372  sc->time_offset = start_time - empty_duration;
3373  if (!mov->advanced_editlist)
3374  current_dts = -sc->time_offset;
3375  }
3376 
3377  if (!multiple_edits && !mov->advanced_editlist &&
3378  st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
3379  sc->start_pad = start_time;
3380  }
3381 
3382  /* only use old uncompressed audio chunk demuxing when stts specifies it */
3383  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3384  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
3385  unsigned int current_sample = 0;
3386  unsigned int stts_sample = 0;
3387  unsigned int sample_size;
3388  unsigned int distance = 0;
3389  unsigned int rap_group_index = 0;
3390  unsigned int rap_group_sample = 0;
3391  int64_t last_dts = 0;
3392  int64_t dts_correction = 0;
3393  int rap_group_present = sc->rap_group_count && sc->rap_group;
3394  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
3395 
3396  current_dts -= sc->dts_shift;
3397  last_dts = current_dts;
3398 
3399  if (!sc->sample_count || st->nb_index_entries)
3400  return;
3401  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3402  return;
3404  st->nb_index_entries + sc->sample_count,
3405  sizeof(*st->index_entries)) < 0) {
3406  st->nb_index_entries = 0;
3407  return;
3408  }
3410 
3411  for (i = 0; i < sc->chunk_count; i++) {
3412  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
3413  current_offset = sc->chunk_offsets[i];
3414  while (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3415  i + 1 == sc->stsc_data[stsc_index + 1].first)
3416  stsc_index++;
3417 
3418  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
3419  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
3420  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
3421  sc->stsz_sample_size = sc->sample_size;
3422  }
3423  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
3424  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
3425  sc->stsz_sample_size = sc->sample_size;
3426  }
3427 
3428  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
3429  int keyframe = 0;
3430  if (current_sample >= sc->sample_count) {
3431  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
3432  return;
3433  }
3434 
3435  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
3436  keyframe = 1;
3437  if (stss_index + 1 < sc->keyframe_count)
3438  stss_index++;
3439  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
3440  keyframe = 1;
3441  if (stps_index + 1 < sc->stps_count)
3442  stps_index++;
3443  }
3444  if (rap_group_present && rap_group_index < sc->rap_group_count) {
3445  if (sc->rap_group[rap_group_index].index > 0)
3446  keyframe = 1;
3447  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
3448  rap_group_sample = 0;
3449  rap_group_index++;
3450  }
3451  }
3452  if (sc->keyframe_absent
3453  && !sc->stps_count
3454  && !rap_group_present
3455  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
3456  keyframe = 1;
3457  if (keyframe)
3458  distance = 0;
3459  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
3460  if (sc->pseudo_stream_id == -1 ||
3461  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
3462  AVIndexEntry *e;
3463  if (sample_size > 0x3FFFFFFF) {
3464  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
3465  return;
3466  }
3467  e = &st->index_entries[st->nb_index_entries++];
3468  e->pos = current_offset;
3469  e->timestamp = current_dts;
3470  e->size = sample_size;
3471  e->min_distance = distance;
3472  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
3473  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
3474  "size %u, distance %u, keyframe %d\n", st->index, current_sample,
3475  current_offset, current_dts, sample_size, distance, keyframe);
3476  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
3477  ff_rfps_add_frame(mov->fc, st, current_dts);
3478  }
3479 
3480  current_offset += sample_size;
3481  stream_size += sample_size;
3482 
3483  /* A negative sample duration is invalid based on the spec,
3484  * but some samples need it to correct the DTS. */
3485  if (sc->stts_data[stts_index].duration < 0) {
3486  av_log(mov->fc, AV_LOG_WARNING,
3487  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
3488  sc->stts_data[stts_index].duration, stts_index,
3489  st->index);
3490  dts_correction += sc->stts_data[stts_index].duration - 1;
3491  sc->stts_data[stts_index].duration = 1;
3492  }
3493  current_dts += sc->stts_data[stts_index].duration;
3494  if (!dts_correction || current_dts + dts_correction > last_dts) {
3495  current_dts += dts_correction;
3496  dts_correction = 0;
3497  } else {
3498  /* Avoid creating non-monotonous DTS */
3499  dts_correction += current_dts - last_dts - 1;
3500  current_dts = last_dts + 1;
3501  }
3502  last_dts = current_dts;
3503  distance++;
3504  stts_sample++;
3505  current_sample++;
3506  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
3507  stts_sample = 0;
3508  stts_index++;
3509  }
3510  }
3511  }
3512  if (st->duration > 0)
3513  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
3514  } else {
3515  unsigned chunk_samples, total = 0;
3516 
3517  // compute total chunk count
3518  for (i = 0; i < sc->stsc_count; i++) {
3519  unsigned count, chunk_count;
3520 
3521  chunk_samples = sc->stsc_data[i].count;
3522  if (i != sc->stsc_count - 1 &&
3523  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
3524  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
3525  return;
3526  }
3527 
3528  if (sc->samples_per_frame >= 160) { // gsm
3529  count = chunk_samples / sc->samples_per_frame;
3530  } else if (sc->samples_per_frame > 1) {
3531  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
3532  count = (chunk_samples+samples-1) / samples;
3533  } else {
3534  count = (chunk_samples+1023) / 1024;
3535  }
3536 
3537  if (mov_stsc_index_valid(i, sc->stsc_count))
3538  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
3539  else
3540  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
3541  total += chunk_count * count;
3542  }
3543 
3544  av_log(mov->fc, AV_LOG_TRACE, "chunk count %u\n", total);
3545  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3546  return;
3548  st->nb_index_entries + total,
3549  sizeof(*st->index_entries)) < 0) {
3550  st->nb_index_entries = 0;
3551  return;
3552  }
3553  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
3554 
3555  // populate index
3556  for (i = 0; i < sc->chunk_count; i++) {
3557  current_offset = sc->chunk_offsets[i];
3558  if (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3559  i + 1 == sc->stsc_data[stsc_index + 1].first)
3560  stsc_index++;
3561  chunk_samples = sc->stsc_data[stsc_index].count;
3562 
3563  while (chunk_samples > 0) {
3564  AVIndexEntry *e;
3565  unsigned size, samples;
3566 
3567  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3569  "Zero bytes per frame, but %d samples per frame",
3570  sc->samples_per_frame);
3571  return;
3572  }
3573 
3574  if (sc->samples_per_frame >= 160) { // gsm
3575  samples = sc->samples_per_frame;
3576  size = sc->bytes_per_frame;
3577  } else {
3578  if (sc->samples_per_frame > 1) {
3579  samples = FFMIN((1024 / sc->samples_per_frame)*
3580  sc->samples_per_frame, chunk_samples);
3581  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3582  } else {
3583  samples = FFMIN(1024, chunk_samples);
3584  size = samples * sc->sample_size;
3585  }
3586  }
3587 
3588  if (st->nb_index_entries >= total) {
3589  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %u\n", total);
3590  return;
3591  }
3592  if (size > 0x3FFFFFFF) {
3593  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
3594  return;
3595  }
3596  e = &st->index_entries[st->nb_index_entries++];
3597  e->pos = current_offset;
3598  e->timestamp = current_dts;
3599  e->size = size;
3600  e->min_distance = 0;
3601  e->flags = AVINDEX_KEYFRAME;
3602  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %u, offset %"PRIx64", dts %"PRId64", "
3603  "size %u, duration %u\n", st->index, i, current_offset, current_dts,
3604  size, samples);
3605 
3606  current_offset += size;
3607  current_dts += samples;
3608  chunk_samples -= samples;
3609  }
3610  }
3611  }
3612 
3613  if (!mov->ignore_editlist && mov->advanced_editlist) {
3614  // Fix index according to edit lists.
3615  mov_fix_index(mov, st);
3616  }
3617 }
3618 
3619 static int test_same_origin(const char *src, const char *ref) {
3620  char src_proto[64];
3621  char ref_proto[64];
3622  char src_auth[256];
3623  char ref_auth[256];
3624  char src_host[256];
3625  char ref_host[256];
3626  int src_port=-1;
3627  int ref_port=-1;
3628 
3629  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
3630  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
3631 
3632  if (strlen(src) == 0) {
3633  return -1;
3634  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
3635  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
3636  strlen(src_host) + 1 >= sizeof(src_host) ||
3637  strlen(ref_host) + 1 >= sizeof(ref_host)) {
3638  return 0;
3639  } else if (strcmp(src_proto, ref_proto) ||
3640  strcmp(src_auth, ref_auth) ||
3641  strcmp(src_host, ref_host) ||
3642  src_port != ref_port) {
3643  return 0;
3644  } else
3645  return 1;
3646 }
3647 
3648 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
3649 {
3650  /* try relative path, we do not try the absolute because it can leak information about our
3651  system to an attacker */
3652  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
3653  char filename[1025];
3654  const char *src_path;
3655  int i, l;
3656 
3657  /* find a source dir */
3658  src_path = strrchr(src, '/');
3659  if (src_path)
3660  src_path++;
3661  else
3662  src_path = src;
3663 
3664  /* find a next level down to target */
3665  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
3666  if (ref->path[l] == '/') {
3667  if (i == ref->nlvl_to - 1)
3668  break;
3669  else
3670  i++;
3671  }
3672 
3673  /* compose filename if next level down to target was found */
3674  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3675  memcpy(filename, src, src_path - src);
3676  filename[src_path - src] = 0;
3677 
3678  for (i = 1; i < ref->nlvl_from; i++)
3679  av_strlcat(filename, "../", sizeof(filename));
3680 
3681  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3682  if (!c->use_absolute_path) {
3683  int same_origin = test_same_origin(src, filename);
3684 
3685  if (!same_origin) {
3686  av_log(c->fc, AV_LOG_ERROR,
3687  "Reference with mismatching origin, %s not tried for security reasons, "
3688  "set demuxer option use_absolute_path to allow it anyway\n",
3689  ref->path);
3690  return AVERROR(ENOENT);
3691  }
3692 
3693  if(strstr(ref->path + l + 1, "..") ||
3694  strstr(ref->path + l + 1, ":") ||
3695  (ref->nlvl_from > 1 && same_origin < 0) ||
3696  (filename[0] == '/' && src_path == src))
3697  return AVERROR(ENOENT);
3698  }
3699 
3700  if (strlen(filename) + 1 == sizeof(filename))
3701  return AVERROR(ENOENT);
3702  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3703  return 0;
3704  }
3705  } else if (c->use_absolute_path) {
3706  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3707  "this is a possible security issue\n");
3708  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3709  return 0;
3710  } else {
3711  av_log(c->fc, AV_LOG_ERROR,
3712  "Absolute path %s not tried for security reasons, "
3713  "set demuxer option use_absolute_path to allow absolute paths\n",
3714  ref->path);
3715  }
3716 
3717  return AVERROR(ENOENT);
3718 }
3719 
3721 {
3722  if (sc->time_scale <= 0) {
3723  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3724  sc->time_scale = c->time_scale;
3725  if (sc->time_scale <= 0)
3726  sc->time_scale = 1;
3727  }
3728 }
3729 
3731 {
3732  AVStream *st;
3733  MOVStreamContext *sc;
3734  int ret;
3735 
3736  st = avformat_new_stream(c->fc, NULL);
3737  if (!st) return AVERROR(ENOMEM);
3738  st->id = c->fc->nb_streams;
3739  sc = av_mallocz(sizeof(MOVStreamContext));
3740  if (!sc) return AVERROR(ENOMEM);
3741 
3742  st->priv_data = sc;
3744  sc->ffindex = st->index;
3745  c->trak_index = st->index;
3746 
3747  if ((ret = mov_read_default(c, pb, atom)) < 0)
3748  return ret;
3749 
3750  c->trak_index = -1;
3751 
3752  /* sanity checks */
3753  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3754  (!sc->sample_size && !sc->sample_count))) {
3755  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3756  st->index);
3757  return 0;
3758  }
3759 
3760  fix_timescale(c, sc);
3761 
3762  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3763 
3764  mov_build_index(c, st);
3765 
3766  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3767  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3768  if (c->enable_drefs) {
3769  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3770  av_log(c->fc, AV_LOG_ERROR,
3771  "stream %d, error opening alias: path='%s', dir='%s', "
3772  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3773  st->index, dref->path, dref->dir, dref->filename,
3774  dref->volume, dref->nlvl_from, dref->nlvl_to);
3775  } else {
3776  av_log(c->fc, AV_LOG_WARNING,
3777  "Skipped opening external track: "
3778  "stream %d, alias: path='%s', dir='%s', "
3779  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3780  "Set enable_drefs to allow this.\n",
3781  st->index, dref->path, dref->dir, dref->filename,
3782  dref->volume, dref->nlvl_from, dref->nlvl_to);
3783  }
3784  } else {
3785  sc->pb = c->fc->pb;
3786  sc->pb_is_copied = 1;
3787  }
3788 
3789  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3790  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3791  sc->height && sc->width &&
3792  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3793  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3794  ((double)st->codecpar->width * sc->height), INT_MAX);
3795  }
3796 
3797 #if FF_API_R_FRAME_RATE
3798  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3800  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3801 #endif
3802  }
3803 
3804  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3805  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3806  TAG_IS_AVCI(st->codecpar->codec_tag)) {
3807  ret = ff_generate_avci_extradata(st);
3808  if (ret < 0)
3809  return ret;
3810  }
3811 
3812  switch (st->codecpar->codec_id) {
3813 #if CONFIG_H261_DECODER
3814  case AV_CODEC_ID_H261:
3815 #endif
3816 #if CONFIG_H263_DECODER
3817  case AV_CODEC_ID_H263:
3818 #endif
3819 #if CONFIG_MPEG4_DECODER
3820  case AV_CODEC_ID_MPEG4:
3821 #endif
3822  st->codecpar->width = 0; /* let decoder init width/height */
3823  st->codecpar->height= 0;
3824  break;
3825  }
3826 
3827  // If the duration of the mp3 packets is not constant, then they could need a parser
3828  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3829  && sc->stts_count > 3
3830  && sc->stts_count*10 > st->nb_frames
3831  && sc->time_scale == st->codecpar->sample_rate) {
3833  }
3834  /* Do not need those anymore. */
3835  av_freep(&sc->chunk_offsets);
3836  av_freep(&sc->sample_sizes);
3837  av_freep(&sc->keyframes);
3838  av_freep(&sc->stts_data);
3839  av_freep(&sc->stps_data);
3840  av_freep(&sc->elst_data);
3841  av_freep(&sc->rap_group);
3842 
3843  return 0;
3844 }
3845 
3847 {
3848  int ret;
3849  c->itunes_metadata = 1;
3850  ret = mov_read_default(c, pb, atom);
3851  c->itunes_metadata = 0;
3852  return ret;
3853 }
3854 
3856 {
3857  uint32_t count;
3858  uint32_t i;
3859 
3860  if (atom.size < 8)
3861  return 0;
3862 
3863  avio_skip(pb, 4);
3864  count = avio_rb32(pb);
3865  if (count > UINT_MAX / sizeof(*c->meta_keys) - 1) {
3866  av_log(c->fc, AV_LOG_ERROR,
3867  "The 'keys' atom with the invalid key count: %"PRIu32"\n", count);
3868  return AVERROR_INVALIDDATA;
3869  }
3870 
3871  c->meta_keys_count = count + 1;
3872  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3873  if (!c->meta_keys)
3874  return AVERROR(ENOMEM);
3875 
3876  for (i = 1; i <= count; ++i) {
3877  uint32_t key_size = avio_rb32(pb);
3878  uint32_t type = avio_rl32(pb);
3879  if (key_size < 8) {
3880  av_log(c->fc, AV_LOG_ERROR,
3881  "The key# %"PRIu32" in meta has invalid size:"
3882  "%"PRIu32"\n", i, key_size);
3883  return AVERROR_INVALIDDATA;
3884  }
3885  key_size -= 8;
3886  if (type != MKTAG('m','d','t','a')) {
3887  avio_skip(pb, key_size);
3888  }
3889  c->meta_keys[i] = av_mallocz(key_size + 1);
3890  if (!c->meta_keys[i])
3891  return AVERROR(ENOMEM);
3892  avio_read(pb, c->meta_keys[i], key_size);
3893  }
3894 
3895  return 0;
3896 }
3897 
3899 {
3900  int64_t end = avio_tell(pb) + atom.size;
3901  uint8_t *key = NULL, *val = NULL, *mean = NULL;
3902  int i;
3903  int ret = 0;
3904  AVStream *st;
3905  MOVStreamContext *sc;
3906 
3907  if (c->fc->nb_streams < 1)
3908  return 0;
3909  st = c->fc->streams[c->fc->nb_streams-1];
3910  sc = st->priv_data;
3911 
3912  for (i = 0; i < 3; i++) {
3913  uint8_t **p;
3914  uint32_t len, tag;
3915 
3916  if (end - avio_tell(pb) <= 12)
3917  break;
3918 
3919  len = avio_rb32(pb);
3920  tag = avio_rl32(pb);
3921  avio_skip(pb, 4); // flags
3922 
3923  if (len < 12 || len - 12 > end - avio_tell(pb))
3924  break;
3925  len -= 12;
3926 
3927  if (tag == MKTAG('m', 'e', 'a', 'n'))
3928  p = &mean;
3929  else if (tag == MKTAG('n', 'a', 'm', 'e'))
3930  p = &key;
3931  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3932  avio_skip(pb, 4);
3933  len -= 4;
3934  p = &val;
3935  } else
3936  break;
3937 
3938  *p = av_malloc(len + 1);
3939  if (!*p)
3940  break;
3941  ret = ffio_read_size(pb, *p, len);
3942  if (ret < 0) {
3943  av_freep(p);
3944  break;
3945  }
3946  (*p)[len] = 0;
3947  }
3948 
3949  if (mean && key && val) {
3950  if (strcmp(key, "iTunSMPB") == 0) {
3951  int priming, remainder, samples;
3952  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3953  if(priming>0 && priming<16384)
3954  sc->start_pad = priming;
3955  }
3956  }
3957  if (strcmp(key, "cdec") != 0) {
3958  av_dict_set(&c->fc->metadata, key, val,
3960  key = val = NULL;
3961  }
3962  } else {
3963  av_log(c->fc, AV_LOG_VERBOSE,
3964  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3965  }
3966 
3967  avio_seek(pb, end, SEEK_SET);
3968  av_freep(&key);
3969  av_freep(&val);
3970  av_freep(&mean);
3971  return ret;
3972 }
3973 
3975 {
3976  while (atom.size > 8) {
3977  uint32_t tag = avio_rl32(pb);
3978  atom.size -= 4;
3979  if (tag == MKTAG('h','d','l','r')) {
3980  avio_seek(pb, -8, SEEK_CUR);
3981  atom.size += 8;
3982  return mov_read_default(c, pb, atom);
3983  }
3984  }
3985  return 0;
3986 }
3987 
3988 // return 1 when matrix is identity, 0 otherwise
3989 #define IS_MATRIX_IDENT(matrix) \
3990  ( (matrix)[0][0] == (1 << 16) && \
3991  (matrix)[1][1] == (1 << 16) && \
3992  (matrix)[2][2] == (1 << 30) && \
3993  !(matrix)[0][1] && !(matrix)[0][2] && \
3994  !(matrix)[1][0] && !(matrix)[1][2] && \
3995  !(matrix)[2][0] && !(matrix)[2][1])
3996 
3998 {
3999  int i, j, e;
4000  int width;
4001  int height;
4002  int display_matrix[3][3];
4003  int res_display_matrix[3][3] = { { 0 } };
4004  AVStream *st;
4005  MOVStreamContext *sc;
4006  int version;
4007  int flags;
4008 
4009  if (c->fc->nb_streams < 1)
4010  return 0;
4011  st = c->fc->streams[c->fc->nb_streams-1];
4012  sc = st->priv_data;
4013 
4014  version = avio_r8(pb);
4015  flags = avio_rb24(pb);
4017 
4018  if (version == 1) {
4019  avio_rb64(pb);
4020  avio_rb64(pb);
4021  } else {
4022  avio_rb32(pb); /* creation time */
4023  avio_rb32(pb); /* modification time */
4024  }
4025  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
4026  avio_rb32(pb); /* reserved */
4027 
4028  /* highlevel (considering edits) duration in movie timebase */
4029  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
4030  avio_rb32(pb); /* reserved */
4031  avio_rb32(pb); /* reserved */
4032 
4033  avio_rb16(pb); /* layer */
4034  avio_rb16(pb); /* alternate group */
4035  avio_rb16(pb); /* volume */
4036  avio_rb16(pb); /* reserved */
4037 
4038  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
4039  // they're kept in fixed point format through all calculations
4040  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
4041  // side data, but the scale factor is not needed to calculate aspect ratio
4042  for (i = 0; i < 3; i++) {
4043  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
4044  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
4045  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
4046  }
4047 
4048  width = avio_rb32(pb); // 16.16 fixed point track width
4049  height = avio_rb32(pb); // 16.16 fixed point track height
4050  sc->width = width >> 16;
4051  sc->height = height >> 16;
4052 
4053  // apply the moov display matrix (after the tkhd one)
4054  for (i = 0; i < 3; i++) {
4055  const int sh[3] = { 16, 16, 30 };
4056  for (j = 0; j < 3; j++) {
4057  for (e = 0; e < 3; e++) {
4058  res_display_matrix[i][j] +=
4059  ((int64_t) display_matrix[i][e] *
4060  c->movie_display_matrix[e][j]) >> sh[e];
4061  }
4062  }
4063  }
4064 
4065  // save the matrix when it is not the default identity
4066  if (!IS_MATRIX_IDENT(res_display_matrix)) {
4067  double rotate;
4068 
4069  av_freep(&sc->display_matrix);
4070  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
4071  if (!sc->display_matrix)
4072  return AVERROR(ENOMEM);
4073 
4074  for (i = 0; i < 3; i++)
4075  for (j = 0; j < 3; j++)
4076  sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
4077 
4080  if (!isnan(rotate)) {
4081  char rotate_buf[64];
4082  rotate = -rotate;
4083  if (rotate < 0) // for backward compatibility
4084  rotate += 360;
4085  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
4086  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
4087  }
4088 #endif
4089  }
4090 
4091  // transform the display width/height according to the matrix
4092  // to keep the same scale, use [width height 1<<16]
4093  if (width && height && sc->display_matrix) {
4094  double disp_transform[2];
4095 
4096  for (i = 0; i < 2; i++)
4097  disp_transform[i] = hypot(sc->display_matrix[0 + i],
4098  sc->display_matrix[3 + i]);
4099 
4100  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
4101  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
4102  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
4104  disp_transform[0] / disp_transform[1],
4105  INT_MAX);
4106  }
4107  return 0;
4108 }
4109 
4111 {
4112  MOVFragment *frag = &c->fragment;
4113  MOVTrackExt *trex = NULL;
4115  int flags, track_id, i, found = 0;
4116 
4117  avio_r8(pb); /* version */
4118  flags = avio_rb24(pb);
4119 
4120  track_id = avio_rb32(pb);
4121  if (!track_id)
4122  return AVERROR_INVALIDDATA;
4123  frag->track_id = track_id;
4124  for (i = 0; i < c->trex_count; i++)
4125  if (c->trex_data[i].track_id == frag->track_id) {
4126  trex = &c->trex_data[i];
4127  break;
4128  }
4129  if (!trex) {
4130  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
4131  return AVERROR_INVALIDDATA;
4132  }
4133 
4136  frag->moof_offset : frag->implicit_offset;
4137  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
4138 
4139  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
4140  avio_rb32(pb) : trex->duration;
4141  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
4142  avio_rb32(pb) : trex->size;
4143  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
4144  avio_rb32(pb) : trex->flags;
4145  frag->time = AV_NOPTS_VALUE;
4146  for (i = 0; i < c->fragment_index_count; i++) {
4147  int j;
4148  MOVFragmentIndex* candidate = c->fragment_index_data[i];
4149  if (candidate->track_id == frag->track_id) {
4150  av_log(c->fc, AV_LOG_DEBUG,
4151  "found fragment index for track %u\n", frag->track_id);
4152  index = candidate;
4153  for (j = index->current_item; j < index->item_count; j++) {
4154  if (frag->implicit_offset == index->items[j].moof_offset) {
4155  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
4156  "for track %u and moof_offset %"PRId64"\n",
4157  frag->track_id, index->items[j].moof_offset);
4158  frag->time = index->items[j].time;
4159  index->current_item = j + 1;
4160  found = 1;
4161  break;
4162  }
4163  }
4164  if (found)
4165  break;
4166  }
4167  }
4168  if (index && !found) {
4169  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
4170  "it doesn't have an (in-order) entry for moof_offset "
4171  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
4172  }
4173  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
4174  return 0;
4175 }
4176 
4178 {
4179  unsigned i, num;
4180  void *new_tracks;
4181 
4182  num = atom.size / 4;
4183  if (!(new_tracks = av_malloc_array(num, sizeof(int))))
4184  return AVERROR(ENOMEM);
4185 
4186  av_free(c->chapter_tracks);
4187  c->chapter_tracks = new_tracks;
4188  c->nb_chapter_tracks = num;
4189 
4190  for (i = 0; i < num && !pb->eof_reached; i++)
4191  c->chapter_tracks[i] = avio_rb32(pb);
4192 
4193  return 0;
4194 }
4195 
4197 {
4198  MOVTrackExt *trex;
4199  int err;
4200 
4201  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
4202  return AVERROR_INVALIDDATA;
4203  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
4204  sizeof(*c->trex_data))) < 0) {
4205  c->trex_count = 0;
4206  return err;
4207  }
4208 
4209  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
4210 
4211  trex = &c->trex_data[c->trex_count++];
4212  avio_r8(pb); /* version */
4213  avio_rb24(pb); /* flags */
4214  trex->track_id = avio_rb32(pb);
4215  trex->stsd_id = avio_rb32(pb);
4216  trex->duration = avio_rb32(pb);
4217  trex->size = avio_rb32(pb);
4218  trex->flags = avio_rb32(pb);
4219  return 0;
4220 }
4221 
4223 {
4224  MOVFragment *frag = &c->fragment;
4225  AVStream *st = NULL;
4226  MOVStreamContext *sc;
4227  int version, i;
4228 
4229  for (i = 0; i < c->fc->nb_streams; i++) {
4230  if (c->fc->streams[i]->id == frag->track_id) {
4231  st = c->fc->streams[i];
4232  break;
4233  }
4234  }
4235  if (!st) {
4236  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4237  return AVERROR_INVALIDDATA;
4238  }
4239  sc = st->priv_data;
4240  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
4241  return 0;
4242  version = avio_r8(pb);
4243  avio_rb24(pb); /* flags */
4244  if (version) {
4245  sc->track_end = avio_rb64(pb);
4246  } else {
4247  sc->track_end = avio_rb32(pb);
4248  }
4249  return 0;
4250 }
4251 
4253 {
4254  MOVFragment *frag = &c->fragment;
4255  AVStream *st = NULL;
4256  MOVStreamContext *sc;
4257  MOVStts *ctts_data;
4258  uint64_t offset;
4259  int64_t dts;
4260  int data_offset = 0;
4261  unsigned entries, first_sample_flags = frag->flags;
4262  int flags, distance, i, err;
4263 
4264  for (i = 0; i < c->fc->nb_streams; i++) {
4265  if (c->fc->streams[i]->id == frag->track_id) {
4266  st = c->fc->streams[i];
4267  break;
4268  }
4269  }
4270  if (!st) {
4271  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4272  return AVERROR_INVALIDDATA;
4273  }
4274  sc = st->priv_data;
4275  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4276  return 0;
4277  avio_r8(pb); /* version */
4278  flags = avio_rb24(pb);
4279  entries = avio_rb32(pb);
4280  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %u\n", flags, entries);
4281 
4282  /* Always assume the presence of composition time offsets.
4283  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
4284  * 1) in the initial movie, there are no samples.
4285  * 2) in the first movie fragment, there is only one sample without composition time offset.
4286  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
4287  if (!sc->ctts_count && sc->sample_count)
4288  {
4289  /* Complement ctts table if moov atom doesn't have ctts atom. */
4290  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
4291  if (!ctts_data)
4292  return AVERROR(ENOMEM);
4293  sc->ctts_data = ctts_data;
4294  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
4295  sc->ctts_data[sc->ctts_count].duration = 0;
4296  sc->ctts_count++;
4297  }
4298  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
4299  return AVERROR_INVALIDDATA;
4300  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
4301  sizeof(*sc->ctts_data))) < 0) {
4302  sc->ctts_count = 0;
4303  return err;
4304  }
4305  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
4306  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
4307  dts = sc->track_end - sc->time_offset;
4308  offset = frag->base_data_offset + data_offset;
4309  distance = 0;
4310  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
4311  for (i = 0; i < entries && !pb->eof_reached; i++) {
4312  unsigned sample_size = frag->size;
4313  int sample_flags = i ? frag->flags : first_sample_flags;
4314  unsigned sample_duration = frag->duration;
4315  int keyframe = 0;
4316 
4317  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
4318  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
4319  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
4320  sc->ctts_data[sc->ctts_count].count = 1;
4321  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
4322  avio_rb32(pb) : 0;
4324  if (frag->time != AV_NOPTS_VALUE) {
4325  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
4326  int64_t pts = frag->time;
4327  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4328  " sc->dts_shift %d ctts.duration %d"
4329  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
4330  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
4331  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
4332  dts = pts - sc->dts_shift;
4333  if (flags & MOV_TRUN_SAMPLE_CTS) {
4334  dts -= sc->ctts_data[sc->ctts_count].duration;
4335  } else {
4336  dts -= sc->time_offset;
4337  }
4338  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
4339  } else {
4340  dts = frag->time - sc->time_offset;
4341  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4342  ", using it for dts\n", dts);
4343  }
4344  frag->time = AV_NOPTS_VALUE;
4345  }
4346  sc->ctts_count++;
4348  keyframe = 1;
4349  else
4350  keyframe =
4351  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
4353  if (keyframe)
4354  distance = 0;
4355  err = av_add_index_entry(st, offset, dts, sample_size, distance,
4356  keyframe ? AVINDEX_KEYFRAME : 0);
4357  if (err < 0) {
4358  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
4359  }
4360  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
4361  "size %u, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
4362  offset, dts, sample_size, distance, keyframe);
4363  distance++;
4364  dts += sample_duration;
4365  offset += sample_size;
4366  sc->data_size += sample_size;
4367  sc->duration_for_fps += sample_duration;
4368  sc->nb_frames_for_fps ++;
4369  }
4370 
4371  if (pb->eof_reached)
4372  return AVERROR_EOF;
4373 
4374  frag->implicit_offset = offset;
4375 
4376  sc->track_end = dts + sc->time_offset;
4377  if (st->duration < sc->track_end)
4378  st->duration = sc->track_end;
4379 
4380  return 0;
4381 }
4382 
4384 {
4385  int64_t offset = avio_tell(pb) + atom.size, pts;
4386  uint8_t version;
4387  unsigned i, track_id;
4388  AVStream *st = NULL;
4389  AVStream *ref_st = NULL;
4390  MOVStreamContext *sc, *ref_sc = NULL;
4393  AVRational timescale;
4394 
4395  version = avio_r8(pb);
4396  if (version > 1) {
4397  avpriv_request_sample(c->fc, "sidx version %u", version);
4398  return 0;
4399  }
4400 
4401  avio_rb24(pb); // flags
4402 
4403  track_id = avio_rb32(pb); // Reference ID
4404  for (i = 0; i < c->fc->nb_streams; i++) {
4405  if (c->fc->streams[i]->id == track_id) {
4406  st = c->fc->streams[i];
4407  break;
4408  }
4409  }
4410  if (!st) {
4411  av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
4412  return 0;
4413  }
4414 
4415  sc = st->priv_data;
4416 
4417  timescale = av_make_q(1, avio_rb32(pb));
4418 
4419  if (timescale.den <= 0) {
4420  av_log(c->fc, AV_LOG_ERROR, "Invalid sidx timescale 1/%d\n", timescale.den);
4421  return AVERROR_INVALIDDATA;
4422  }
4423 
4424  if (version == 0) {
4425  pts = avio_rb32(pb);
4426  offset += avio_rb32(pb);
4427  } else {
4428  pts = avio_rb64(pb);
4429  offset += avio_rb64(pb);
4430  }
4431 
4432  avio_rb16(pb); // reserved
4433 
4434  index = av_mallocz(sizeof(MOVFragmentIndex));
4435  if (!index)
4436  return AVERROR(ENOMEM);
4437 
4438  index->track_id = track_id;
4439 
4440  index->item_count = avio_rb16(pb);
4441  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
4442 
4443  if (!index->items) {
4444  av_freep(&index);
4445  return AVERROR(ENOMEM);
4446  }
4447 
4448  for (i = 0; i < index->item_count; i++) {
4449  uint32_t size = avio_rb32(pb);
4450  uint32_t duration = avio_rb32(pb);
4451  if (size & 0x80000000) {
4452  avpriv_request_sample(c->fc, "sidx reference_type 1");
4453  av_freep(&index->items);
4454  av_freep(&index);
4455  return AVERROR_PATCHWELCOME;
4456  }
4457  avio_rb32(pb); // sap_flags
4458  index->items[i].moof_offset = offset;
4459  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
4460  offset += size;
4461  pts += duration;
4462  }
4463 
4464  st->duration = sc->track_end = pts;
4465 
4467  c->fragment_index_count + 1,
4468  sizeof(MOVFragmentIndex*));
4469  if (!tmp) {
4470  av_freep(&index->items);
4471  av_freep(&index);
4472  return AVERROR(ENOMEM);
4473  }
4474 
4475  c->fragment_index_data = tmp;
4477  sc->has_sidx = 1;
4478 
4479  if (offset == avio_size(pb)) {
4480  for (i = 0; i < c->fc->nb_streams; i++) {
4481  if (c->fc->streams[i]->id == c->fragment_index_data[0]->track_id) {
4482  ref_st = c->fc->streams[i];
4483  ref_sc = ref_st->priv_data;
4484  break;
4485  }
4486  }
4487  for (i = 0; i < c->fc->nb_streams; i++) {
4488  st = c->fc->streams[i];
4489  sc = st->priv_data;
4490  if (!sc->has_sidx) {
4491  st->duration = sc->track_end = av_rescale(ref_st->duration, sc->time_scale, ref_sc->time_scale);
4492  }
4493  }
4494 
4495  c->fragment_index_complete = 1;
4496  }
4497 
4498  return 0;
4499 }
4500 
4501 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
4502 /* like the files created with Adobe Premiere 5.0, for samples see */
4503 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
4505 {
4506  int err;
4507 
4508  if (atom.size < 8)
4509  return 0; /* continue */
4510  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
4511  avio_skip(pb, atom.size - 4);
4512  return 0;
4513  }
4514  atom.type = avio_rl32(pb);
4515  atom.size -= 8;
4516  if (atom.type != MKTAG('m','d','a','t')) {
4517  avio_skip(pb, atom.size);
4518  return 0;
4519  }
4520  err = mov_read_mdat(c, pb, atom);
4521  return err;
4522 }
4523 
4525 {
4526 #if CONFIG_ZLIB
4527  AVIOContext ctx;
4528  uint8_t *cmov_data;
4529  uint8_t *moov_data; /* uncompressed data */
4530  long cmov_len, moov_len;
4531  int ret = -1;
4532 
4533  avio_rb32(pb); /* dcom atom */
4534  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
4535  return AVERROR_INVALIDDATA;
4536  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
4537  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
4538  return AVERROR_INVALIDDATA;
4539  }
4540  avio_rb32(pb); /* cmvd atom */
4541  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
4542  return AVERROR_INVALIDDATA;
4543  moov_len = avio_rb32(pb); /* uncompressed size */
4544  cmov_len = atom.size - 6 * 4;
4545 
4546  cmov_data = av_malloc(cmov_len);
4547  if (!cmov_data)
4548  return AVERROR(ENOMEM);
4549  moov_data = av_malloc(moov_len);
4550  if (!moov_data) {
4551  av_free(cmov_data);
4552  return AVERROR(ENOMEM);
4553  }
4554  ret = ffio_read_size(pb, cmov_data, cmov_len);
4555  if (ret < 0)
4556  goto free_and_return;
4557 
4558  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
4559  goto free_and_return;
4560  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
4561  goto free_and_return;
4563  atom.type = MKTAG('m','o','o','v');
4564  atom.size = moov_len;
4565  ret = mov_read_default(c, &ctx, atom);
4566 free_and_return:
4567  av_free(moov_data);
4568  av_free(cmov_data);
4569  return ret;
4570 #else
4571  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
4572  return AVERROR(ENOSYS);
4573 #endif
4574 }
4575 
4576 /* edit list atom */
4578 {
4579  MOVStreamContext *sc;
4580  int i, edit_count, version;
4581 
4582  if (c->fc->nb_streams < 1 || c->ignore_editlist)
4583  return 0;
4584  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
4585 
4586  version = avio_r8(pb); /* version */
4587  avio_rb24(pb); /* flags */
4588  edit_count = avio_rb32(pb); /* entries */
4589 
4590  if (!edit_count)
4591  return 0;
4592  if (sc->elst_data)
4593  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
4594  av_free(sc->elst_data);
4595  sc->elst_count = 0;
4596  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
4597  if (!sc->elst_data)
4598  return AVERROR(ENOMEM);
4599 
4600  av_log(c->fc, AV_LOG_TRACE, "track[%u].edit_count = %i\n", c->fc->nb_streams - 1, edit_count);
4601  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
4602  MOVElst *e = &sc->elst_data[i];
4603 
4604  if (version == 1) {
4605  e->duration = avio_rb64(pb);
4606  e->time = avio_rb64(pb);
4607  } else {
4608  e->duration = avio_rb32(pb); /* segment duration */
4609  e->time = (int32_t)avio_rb32(pb); /* media time */
4610  }
4611  e->rate = avio_rb32(pb) / 65536.0;
4612  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
4613  e->duration, e->time, e->rate);
4614 
4615  if (e->time < 0 && e->time != -1 &&
4617  av_log(c->fc, AV_LOG_ERROR, "Track %d, edit %d: Invalid edit list media time=%"PRId64"\n",
4618  c->fc->nb_streams-1, i, e->time);
4619  return AVERROR_INVALIDDATA;
4620  }
4621  }
4622  sc->elst_count = i;
4623 
4624  return 0;
4625 }
4626 
4628 {
4629  MOVStreamContext *sc;
4630 
4631  if (c->fc->nb_streams < 1)
4632  return AVERROR_INVALIDDATA;
4633  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4634  sc->timecode_track = avio_rb32(pb);
4635  return 0;
4636 }
4637 
4639 {
4640  AVStream *st;
4641  int version, color_range, color_primaries, color_trc, color_space;
4642 
4643  if (c->fc->nb_streams < 1)
4644  return 0;
4645  st = c->fc->streams[c->fc->nb_streams - 1];
4646 
4647  if (atom.size < 5) {
4648  av_log(c->fc, AV_LOG_ERROR, "Empty VP Codec Configuration box\n");
4649  return AVERROR_INVALIDDATA;
4650  }
4651 
4652  version = avio_r8(pb);
4653  if (version != 1) {
4654  av_log(c->fc, AV_LOG_WARNING, "Unsupported VP Codec Configuration box version %d\n", version);
4655  return 0;
4656  }
4657  avio_skip(pb, 3); /* flags */
4658 
4659  avio_skip(pb, 2); /* profile + level */
4660  color_range = avio_r8(pb); /* bitDepth, chromaSubsampling, videoFullRangeFlag */
4661  color_primaries = avio_r8(pb);
4662  color_trc = avio_r8(pb);
4663  color_space = avio_r8(pb);
4664  if (avio_rb16(pb)) /* codecIntializationDataSize */
4665  return AVERROR_INVALIDDATA;
4666 
4667  if (!av_color_primaries_name(color_primaries))
4668  color_primaries = AVCOL_PRI_UNSPECIFIED;
4669  if (!av_color_transfer_name(color_trc))
4670  color_trc = AVCOL_TRC_UNSPECIFIED;
4671  if (!av_color_space_name(color_space))
4672  color_space = AVCOL_SPC_UNSPECIFIED;
4673 
4674  st->codecpar->color_range = (color_range & 1) ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
4676  st->codecpar->color_trc = color_trc;
4677  st->codecpar->color_space = color_space;
4678 
4679  return 0;
4680 }
4681 
4683 {
4684  MOVStreamContext *sc;
4685  const int chroma_den = 50000;
4686  const int luma_den = 10000;
4687  int i, j, version;
4688 
4689  if (c->fc->nb_streams < 1)
4690  return AVERROR_INVALIDDATA;
4691 
4692  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4693 
4694  if (atom.size < 5) {
4695  av_log(c->fc, AV_LOG_ERROR, "Empty Mastering Display Metadata box\n");
4696  return AVERROR_INVALIDDATA;
4697  }
4698 
4699  version = avio_r8(pb);
4700  if (version) {
4701  av_log(c->fc, AV_LOG_WARNING, "Unsupported Mastering Display Metadata box version %d\n", version);
4702  return 0;
4703  }
4704  avio_skip(pb, 3); /* flags */
4705 
4707  if (!sc->