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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 edit_list_index = 0;
3043  int64_t index;
3044  int64_t index_ctts_count;
3045  int flags;
3046  unsigned int ctts_allocated_size = 0;
3047  int64_t start_dts = 0;
3048  int64_t edit_list_media_time_dts = 0;
3049  int64_t edit_list_start_encountered = 0;
3050  int64_t search_timestamp = 0;
3051  int64_t* frame_duration_buffer = NULL;
3052  int num_discarded_begin = 0;
3053  int first_non_zero_audio_edit = -1;
3054  int packet_skip_samples = 0;
3055  MOVIndexRange *current_index_range;
3056 
3057  if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
3058  return;
3059  }
3060 
3061  // allocate the index ranges array
3062  msc->index_ranges = av_malloc((msc->elst_count + 1) * sizeof(msc->index_ranges[0]));
3063  if (!msc->index_ranges) {
3064  av_log(mov->fc, AV_LOG_ERROR, "Cannot allocate index ranges buffer\n");
3065  return;
3066  }
3067  msc->current_index_range = msc->index_ranges;
3068  current_index_range = msc->index_ranges - 1;
3069 
3070  // Clean AVStream from traces of old index
3071  st->index_entries = NULL;
3073  st->nb_index_entries = 0;
3074 
3075  // Clean ctts fields of MOVStreamContext
3076  msc->ctts_data = NULL;
3077  msc->ctts_count = 0;
3078  msc->ctts_index = 0;
3079  msc->ctts_sample = 0;
3080 
3081  // If the dts_shift is positive (in case of negative ctts values in mov),
3082  // then negate the DTS by dts_shift
3083  if (msc->dts_shift > 0)
3084  edit_list_dts_entry_end -= msc->dts_shift;
3085 
3086  // Offset the DTS by ctts[0] to make the PTS of the first frame 0
3087  if (ctts_data_old && ctts_count_old > 0) {
3088  edit_list_dts_entry_end -= ctts_data_old[0].duration;
3089  av_log(mov->fc, AV_LOG_DEBUG, "Offset DTS by ctts[%d].duration: %d\n", 0, ctts_data_old[0].duration);
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  continue;
3104  }
3105 
3106  // If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
3107  // according to the edit list below.
3108  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3109  if (first_non_zero_audio_edit < 0) {
3110  first_non_zero_audio_edit = 1;
3111  } else {
3112  first_non_zero_audio_edit = 0;
3113  }
3114 
3115  if (first_non_zero_audio_edit > 0)
3116  st->skip_samples = msc->start_pad = 0;
3117  }
3118 
3119  //find closest previous key frame
3120  edit_list_media_time_dts = edit_list_media_time;
3121  if (msc->dts_shift > 0) {
3122  edit_list_media_time_dts -= msc->dts_shift;
3123  }
3124 
3125  // While reordering frame index according to edit list we must handle properly
3126  // the scenario when edit list entry starts from none key frame.
3127  // We find closest previous key frame and preserve it and consequent frames in index.
3128  // All frames which are outside edit list entry time boundaries will be dropped after decoding.
3129  search_timestamp = edit_list_media_time_dts;
3130  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3131  // Audio decoders like AAC need need a decoder delay samples previous to the current sample,
3132  // to correctly decode this frame. Hence for audio we seek to a frame 1 sec. before the
3133  // edit_list_media_time to cover the decoder delay.
3134  search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
3135  }
3136 
3137  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, 0);
3138  if (index == -1) {
3139  av_log(mov->fc, AV_LOG_WARNING,
3140  "st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
3141  st->index, edit_list_index, search_timestamp);
3142  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, AVSEEK_FLAG_ANY);
3143 
3144  if (index == -1) {
3145  av_log(mov->fc, AV_LOG_WARNING,
3146  "st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n"
3147  "Rounding edit list media time to zero.\n",
3148  st->index, edit_list_index, search_timestamp);
3149  index = 0;
3150  edit_list_media_time = 0;
3151  }
3152  }
3153  current = e_old + index;
3154 
3155  ctts_index_old = 0;
3156  ctts_sample_old = 0;
3157 
3158  // set ctts_index properly for the found key frame
3159  for (index_ctts_count = 0; index_ctts_count < index; index_ctts_count++) {
3160  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3161  ctts_sample_old++;
3162  if (ctts_data_old[ctts_index_old].count == ctts_sample_old) {
3163  ctts_index_old++;
3164  ctts_sample_old = 0;
3165  }
3166  }
3167  }
3168 
3169  edit_list_start_ctts_sample = ctts_sample_old;
3170 
3171  // Iterate over index and arrange it according to edit list
3172  edit_list_start_encountered = 0;
3173  for (; current < e_old_end; current++, index++) {
3174  // check if frame outside edit list mark it for discard
3175  frame_duration = (current + 1 < e_old_end) ?
3176  ((current + 1)->timestamp - current->timestamp) : edit_list_duration;
3177 
3178  flags = current->flags;
3179 
3180  // frames (pts) before or after edit list
3181  curr_cts = current->timestamp + msc->dts_shift;
3182 
3183  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3184  av_log(mov->fc, AV_LOG_DEBUG, "shifted frame pts, curr_cts: %"PRId64" @ %"PRId64", ctts: %d, ctts_count: %"PRId64"\n",
3185  curr_cts, ctts_index_old, ctts_data_old[ctts_index_old].duration, ctts_count_old);
3186  curr_cts += ctts_data_old[ctts_index_old].duration;
3187  ctts_sample_old++;
3188  if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
3189  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3190  &ctts_allocated_size,
3191  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3192  ctts_data_old[ctts_index_old].duration) == -1) {
3193  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3194  ctts_index_old,
3195  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3196  ctts_data_old[ctts_index_old].duration);
3197  break;
3198  }
3199  ctts_index_old++;
3200  ctts_sample_old = 0;
3201  edit_list_start_ctts_sample = 0;
3202  }
3203  }
3204 
3205  if (curr_cts < edit_list_media_time || curr_cts >= (edit_list_duration + edit_list_media_time)) {
3207  curr_cts < edit_list_media_time && curr_cts + frame_duration > edit_list_media_time &&
3208  first_non_zero_audio_edit > 0) {
3209  packet_skip_samples = edit_list_media_time - curr_cts;
3210  st->skip_samples += packet_skip_samples;
3211 
3212  // Shift the index entry timestamp by packet_skip_samples to be correct.
3213  edit_list_dts_counter -= packet_skip_samples;
3214  if (edit_list_start_encountered == 0) {
3215  edit_list_start_encountered = 1;
3216  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3217  // discarded packets.
3218  if (frame_duration_buffer) {
3219  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3220  frame_duration_buffer, num_discarded_begin);
3221  av_freep(&frame_duration_buffer);
3222  }
3223  }
3224 
3225  av_log(mov->fc, AV_LOG_DEBUG, "skip %d audio samples from curr_cts: %"PRId64"\n", packet_skip_samples, curr_cts);
3226  } else {
3227  flags |= AVINDEX_DISCARD_FRAME;
3228  av_log(mov->fc, AV_LOG_DEBUG, "drop a frame at curr_cts: %"PRId64" @ %"PRId64"\n", curr_cts, index);
3229 
3230  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && edit_list_start_encountered == 0) {
3231  num_discarded_begin++;
3232  frame_duration_buffer = av_realloc(frame_duration_buffer,
3233  num_discarded_begin * sizeof(int64_t));
3234  if (!frame_duration_buffer) {
3235  av_log(mov->fc, AV_LOG_ERROR, "Cannot reallocate frame duration buffer\n");
3236  break;
3237  }
3238  frame_duration_buffer[num_discarded_begin - 1] = frame_duration;
3239 
3240  // Increment skip_samples for the first non-zero audio edit list
3241  if (first_non_zero_audio_edit > 0 && st->codecpar->codec_id != AV_CODEC_ID_VORBIS) {
3242  st->skip_samples += frame_duration;
3243  msc->start_pad = st->skip_samples;
3244  }
3245  }
3246  }
3247  } else if (edit_list_start_encountered == 0) {
3248  edit_list_start_encountered = 1;
3249  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3250  // discarded packets.
3251  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && frame_duration_buffer) {
3252  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3253  frame_duration_buffer, num_discarded_begin);
3254  av_freep(&frame_duration_buffer);
3255  }
3256  }
3257 
3258  if (add_index_entry(st, current->pos, edit_list_dts_counter, current->size,
3259  current->min_distance, flags) == -1) {
3260  av_log(mov->fc, AV_LOG_ERROR, "Cannot add index entry\n");
3261  break;
3262  }
3263 
3264  // Update the index ranges array
3265  if (current_index_range < msc->index_ranges || index != current_index_range->end) {
3266  current_index_range++;
3267  current_index_range->start = index;
3268  }
3269  current_index_range->end = index + 1;
3270 
3271  // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list.
3272  if (edit_list_start_encountered > 0) {
3273  edit_list_dts_counter = edit_list_dts_counter + frame_duration;
3274  }
3275 
3276  // Break when found first key frame after edit entry completion
3277  if (((curr_cts + frame_duration) >= (edit_list_duration + edit_list_media_time)) &&
3278  ((flags & AVINDEX_KEYFRAME) || ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)))) {
3279 
3280  if (ctts_data_old && ctts_sample_old != 0) {
3281  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3282  &ctts_allocated_size,
3283  ctts_sample_old - edit_list_start_ctts_sample,
3284  ctts_data_old[ctts_index_old].duration) == -1) {
3285  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3286  ctts_index_old, ctts_sample_old - edit_list_start_ctts_sample,
3287  ctts_data_old[ctts_index_old].duration);
3288  break;
3289  }
3290  }
3291  break;
3292  }
3293  }
3294  }
3295  // Update av stream length
3296  st->duration = edit_list_dts_entry_end - start_dts;
3297 
3298  // Free the old index and the old CTTS structures
3299  av_free(e_old);
3300  av_free(ctts_data_old);
3301 
3302  // Null terminate the index ranges array
3303  current_index_range++;
3304  current_index_range->start = 0;
3305  current_index_range->end = 0;
3306  msc->current_index = msc->index_ranges[0].start;
3307 }
3308 
3309 static void mov_build_index(MOVContext *mov, AVStream *st)
3310 {
3311  MOVStreamContext *sc = st->priv_data;
3312  int64_t current_offset;
3313  int64_t current_dts = 0;
3314  unsigned int stts_index = 0;
3315  unsigned int stsc_index = 0;
3316  unsigned int stss_index = 0;
3317  unsigned int stps_index = 0;
3318  unsigned int i, j;
3319  uint64_t stream_size = 0;
3320 
3321  if (sc->elst_count) {
3322  int i, edit_start_index = 0, multiple_edits = 0;
3323  int64_t empty_duration = 0; // empty duration of the first edit list entry
3324  int64_t start_time = 0; // start time of the media
3325 
3326  for (i = 0; i < sc->elst_count; i++) {
3327  const MOVElst *e = &sc->elst_data[i];
3328  if (i == 0 && e->time == -1) {
3329  /* if empty, the first entry is the start time of the stream
3330  * relative to the presentation itself */
3331  empty_duration = e->duration;
3332  edit_start_index = 1;
3333  } else if (i == edit_start_index && e->time >= 0) {
3334  start_time = e->time;
3335  } else {
3336  multiple_edits = 1;
3337  }
3338  }
3339 
3340  if (multiple_edits && !mov->advanced_editlist)
3341  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
3342  "Use -advanced_editlist to correctly decode otherwise "
3343  "a/v desync might occur\n");
3344 
3345  /* adjust first dts according to edit list */
3346  if ((empty_duration || start_time) && mov->time_scale > 0) {
3347  if (empty_duration)
3348  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
3349  sc->time_offset = start_time - empty_duration;
3350  if (!mov->advanced_editlist)
3351  current_dts = -sc->time_offset;
3352  }
3353 
3354  if (!multiple_edits && !mov->advanced_editlist &&
3355  st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
3356  sc->start_pad = start_time;
3357  }
3358 
3359  /* only use old uncompressed audio chunk demuxing when stts specifies it */
3360  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3361  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
3362  unsigned int current_sample = 0;
3363  unsigned int stts_sample = 0;
3364  unsigned int sample_size;
3365  unsigned int distance = 0;
3366  unsigned int rap_group_index = 0;
3367  unsigned int rap_group_sample = 0;
3368  int64_t last_dts = 0;
3369  int64_t dts_correction = 0;
3370  int rap_group_present = sc->rap_group_count && sc->rap_group;
3371  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
3372 
3373  current_dts -= sc->dts_shift;
3374  last_dts = current_dts;
3375 
3376  if (!sc->sample_count || st->nb_index_entries)
3377  return;
3378  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3379  return;
3381  st->nb_index_entries + sc->sample_count,
3382  sizeof(*st->index_entries)) < 0) {
3383  st->nb_index_entries = 0;
3384  return;
3385  }
3387 
3388  for (i = 0; i < sc->chunk_count; i++) {
3389  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
3390  current_offset = sc->chunk_offsets[i];
3391  while (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3392  i + 1 == sc->stsc_data[stsc_index + 1].first)
3393  stsc_index++;
3394 
3395  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
3396  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
3397  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
3398  sc->stsz_sample_size = sc->sample_size;
3399  }
3400  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
3401  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
3402  sc->stsz_sample_size = sc->sample_size;
3403  }
3404 
3405  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
3406  int keyframe = 0;
3407  if (current_sample >= sc->sample_count) {
3408  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
3409  return;
3410  }
3411 
3412  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
3413  keyframe = 1;
3414  if (stss_index + 1 < sc->keyframe_count)
3415  stss_index++;
3416  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
3417  keyframe = 1;
3418  if (stps_index + 1 < sc->stps_count)
3419  stps_index++;
3420  }
3421  if (rap_group_present && rap_group_index < sc->rap_group_count) {
3422  if (sc->rap_group[rap_group_index].index > 0)
3423  keyframe = 1;
3424  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
3425  rap_group_sample = 0;
3426  rap_group_index++;
3427  }
3428  }
3429  if (sc->keyframe_absent
3430  && !sc->stps_count
3431  && !rap_group_present
3432  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
3433  keyframe = 1;
3434  if (keyframe)
3435  distance = 0;
3436  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
3437  if (sc->pseudo_stream_id == -1 ||
3438  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
3439  AVIndexEntry *e;
3440  if (sample_size > 0x3FFFFFFF) {
3441  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
3442  return;
3443  }
3444  e = &st->index_entries[st->nb_index_entries++];
3445  e->pos = current_offset;
3446  e->timestamp = current_dts;
3447  e->size = sample_size;
3448  e->min_distance = distance;
3449  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
3450  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
3451  "size %u, distance %u, keyframe %d\n", st->index, current_sample,
3452  current_offset, current_dts, sample_size, distance, keyframe);
3453  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
3454  ff_rfps_add_frame(mov->fc, st, current_dts);
3455  }
3456 
3457  current_offset += sample_size;
3458  stream_size += sample_size;
3459 
3460  /* A negative sample duration is invalid based on the spec,
3461  * but some samples need it to correct the DTS. */
3462  if (sc->stts_data[stts_index].duration < 0) {
3463  av_log(mov->fc, AV_LOG_WARNING,
3464  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
3465  sc->stts_data[stts_index].duration, stts_index,
3466  st->index);
3467  dts_correction += sc->stts_data[stts_index].duration - 1;
3468  sc->stts_data[stts_index].duration = 1;
3469  }
3470  current_dts += sc->stts_data[stts_index].duration;
3471  if (!dts_correction || current_dts + dts_correction > last_dts) {
3472  current_dts += dts_correction;
3473  dts_correction = 0;
3474  } else {
3475  /* Avoid creating non-monotonous DTS */
3476  dts_correction += current_dts - last_dts - 1;
3477  current_dts = last_dts + 1;
3478  }
3479  last_dts = current_dts;
3480  distance++;
3481  stts_sample++;
3482  current_sample++;
3483  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
3484  stts_sample = 0;
3485  stts_index++;
3486  }
3487  }
3488  }
3489  if (st->duration > 0)
3490  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
3491  } else {
3492  unsigned chunk_samples, total = 0;
3493 
3494  // compute total chunk count
3495  for (i = 0; i < sc->stsc_count; i++) {
3496  unsigned count, chunk_count;
3497 
3498  chunk_samples = sc->stsc_data[i].count;
3499  if (i != sc->stsc_count - 1 &&
3500  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
3501  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
3502  return;
3503  }
3504 
3505  if (sc->samples_per_frame >= 160) { // gsm
3506  count = chunk_samples / sc->samples_per_frame;
3507  } else if (sc->samples_per_frame > 1) {
3508  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
3509  count = (chunk_samples+samples-1) / samples;
3510  } else {
3511  count = (chunk_samples+1023) / 1024;
3512  }
3513 
3514  if (mov_stsc_index_valid(i, sc->stsc_count))
3515  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
3516  else
3517  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
3518  total += chunk_count * count;
3519  }
3520 
3521  av_log(mov->fc, AV_LOG_TRACE, "chunk count %u\n", total);
3522  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3523  return;
3525  st->nb_index_entries + total,
3526  sizeof(*st->index_entries)) < 0) {
3527  st->nb_index_entries = 0;
3528  return;
3529  }
3530  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
3531 
3532  // populate index
3533  for (i = 0; i < sc->chunk_count; i++) {
3534  current_offset = sc->chunk_offsets[i];
3535  if (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3536  i + 1 == sc->stsc_data[stsc_index + 1].first)
3537  stsc_index++;
3538  chunk_samples = sc->stsc_data[stsc_index].count;
3539 
3540  while (chunk_samples > 0) {
3541  AVIndexEntry *e;
3542  unsigned size, samples;
3543 
3544  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3546  "Zero bytes per frame, but %d samples per frame",
3547  sc->samples_per_frame);
3548  return;
3549  }
3550 
3551  if (sc->samples_per_frame >= 160) { // gsm
3552  samples = sc->samples_per_frame;
3553  size = sc->bytes_per_frame;
3554  } else {
3555  if (sc->samples_per_frame > 1) {
3556  samples = FFMIN((1024 / sc->samples_per_frame)*
3557  sc->samples_per_frame, chunk_samples);
3558  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3559  } else {
3560  samples = FFMIN(1024, chunk_samples);
3561  size = samples * sc->sample_size;
3562  }
3563  }
3564 
3565  if (st->nb_index_entries >= total) {
3566  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %u\n", total);
3567  return;
3568  }
3569  if (size > 0x3FFFFFFF) {
3570  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
3571  return;
3572  }
3573  e = &st->index_entries[st->nb_index_entries++];
3574  e->pos = current_offset;
3575  e->timestamp = current_dts;
3576  e->size = size;
3577  e->min_distance = 0;
3578  e->flags = AVINDEX_KEYFRAME;
3579  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %u, offset %"PRIx64", dts %"PRId64", "
3580  "size %u, duration %u\n", st->index, i, current_offset, current_dts,
3581  size, samples);
3582 
3583  current_offset += size;
3584  current_dts += samples;
3585  chunk_samples -= samples;
3586  }
3587  }
3588  }
3589 
3590  if (!mov->ignore_editlist && mov->advanced_editlist) {
3591  // Fix index according to edit lists.
3592  mov_fix_index(mov, st);
3593  }
3594 }
3595 
3596 static int test_same_origin(const char *src, const char *ref) {
3597  char src_proto[64];
3598  char ref_proto[64];
3599  char src_auth[256];
3600  char ref_auth[256];
3601  char src_host[256];
3602  char ref_host[256];
3603  int src_port=-1;
3604  int ref_port=-1;
3605 
3606  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
3607  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
3608 
3609  if (strlen(src) == 0) {
3610  return -1;
3611  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
3612  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
3613  strlen(src_host) + 1 >= sizeof(src_host) ||
3614  strlen(ref_host) + 1 >= sizeof(ref_host)) {
3615  return 0;
3616  } else if (strcmp(src_proto, ref_proto) ||
3617  strcmp(src_auth, ref_auth) ||
3618  strcmp(src_host, ref_host) ||
3619  src_port != ref_port) {
3620  return 0;
3621  } else
3622  return 1;
3623 }
3624 
3625 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
3626 {
3627  /* try relative path, we do not try the absolute because it can leak information about our
3628  system to an attacker */
3629  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
3630  char filename[1025];
3631  const char *src_path;
3632  int i, l;
3633 
3634  /* find a source dir */
3635  src_path = strrchr(src, '/');
3636  if (src_path)
3637  src_path++;
3638  else
3639  src_path = src;
3640 
3641  /* find a next level down to target */
3642  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
3643  if (ref->path[l] == '/') {
3644  if (i == ref->nlvl_to - 1)
3645  break;
3646  else
3647  i++;
3648  }
3649 
3650  /* compose filename if next level down to target was found */
3651  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3652  memcpy(filename, src, src_path - src);
3653  filename[src_path - src] = 0;
3654 
3655  for (i = 1; i < ref->nlvl_from; i++)
3656  av_strlcat(filename, "../", sizeof(filename));
3657 
3658  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3659  if (!c->use_absolute_path) {
3660  int same_origin = test_same_origin(src, filename);
3661 
3662  if (!same_origin) {
3663  av_log(c->fc, AV_LOG_ERROR,
3664  "Reference with mismatching origin, %s not tried for security reasons, "
3665  "set demuxer option use_absolute_path to allow it anyway\n",
3666  ref->path);
3667  return AVERROR(ENOENT);
3668  }
3669 
3670  if(strstr(ref->path + l + 1, "..") ||
3671  strstr(ref->path + l + 1, ":") ||
3672  (ref->nlvl_from > 1 && same_origin < 0) ||
3673  (filename[0] == '/' && src_path == src))
3674  return AVERROR(ENOENT);
3675  }
3676 
3677  if (strlen(filename) + 1 == sizeof(filename))
3678  return AVERROR(ENOENT);
3679  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3680  return 0;
3681  }
3682  } else if (c->use_absolute_path) {
3683  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3684  "this is a possible security issue\n");
3685  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3686  return 0;
3687  } else {
3688  av_log(c->fc, AV_LOG_ERROR,
3689  "Absolute path %s not tried for security reasons, "
3690  "set demuxer option use_absolute_path to allow absolute paths\n",
3691  ref->path);
3692  }
3693 
3694  return AVERROR(ENOENT);
3695 }
3696 
3698 {
3699  if (sc->time_scale <= 0) {
3700  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3701  sc->time_scale = c->time_scale;
3702  if (sc->time_scale <= 0)
3703  sc->time_scale = 1;
3704  }
3705 }
3706 
3708 {
3709  AVStream *st;
3710  MOVStreamContext *sc;
3711  int ret;
3712 
3713  st = avformat_new_stream(c->fc, NULL);
3714  if (!st) return AVERROR(ENOMEM);
3715  st->id = c->fc->nb_streams;
3716  sc = av_mallocz(sizeof(MOVStreamContext));
3717  if (!sc) return AVERROR(ENOMEM);
3718 
3719  st->priv_data = sc;
3721  sc->ffindex = st->index;
3722  c->trak_index = st->index;
3723 
3724  if ((ret = mov_read_default(c, pb, atom)) < 0)
3725  return ret;
3726 
3727  c->trak_index = -1;
3728 
3729  /* sanity checks */
3730  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3731  (!sc->sample_size && !sc->sample_count))) {
3732  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3733  st->index);
3734  return 0;
3735  }
3736 
3737  fix_timescale(c, sc);
3738 
3739  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3740 
3741  mov_build_index(c, st);
3742 
3743  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3744  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3745  if (c->enable_drefs) {
3746  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3747  av_log(c->fc, AV_LOG_ERROR,
3748  "stream %d, error opening alias: path='%s', dir='%s', "
3749  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3750  st->index, dref->path, dref->dir, dref->filename,
3751  dref->volume, dref->nlvl_from, dref->nlvl_to);
3752  } else {
3753  av_log(c->fc, AV_LOG_WARNING,
3754  "Skipped opening external track: "
3755  "stream %d, alias: path='%s', dir='%s', "
3756  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3757  "Set enable_drefs to allow this.\n",
3758  st->index, dref->path, dref->dir, dref->filename,
3759  dref->volume, dref->nlvl_from, dref->nlvl_to);
3760  }
3761  } else {
3762  sc->pb = c->fc->pb;
3763  sc->pb_is_copied = 1;
3764  }
3765 
3766  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3767  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3768  sc->height && sc->width &&
3769  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3770  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3771  ((double)st->codecpar->width * sc->height), INT_MAX);
3772  }
3773 
3774 #if FF_API_R_FRAME_RATE
3775  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3777  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3778 #endif
3779  }
3780 
3781  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3782  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3783  TAG_IS_AVCI(st->codecpar->codec_tag)) {
3784  ret = ff_generate_avci_extradata(st);
3785  if (ret < 0)
3786  return ret;
3787  }
3788 
3789  switch (st->codecpar->codec_id) {
3790 #if CONFIG_H261_DECODER
3791  case AV_CODEC_ID_H261:
3792 #endif
3793 #if CONFIG_H263_DECODER
3794  case AV_CODEC_ID_H263:
3795 #endif
3796 #if CONFIG_MPEG4_DECODER
3797  case AV_CODEC_ID_MPEG4:
3798 #endif
3799  st->codecpar->width = 0; /* let decoder init width/height */
3800  st->codecpar->height= 0;
3801  break;
3802  }
3803 
3804  // If the duration of the mp3 packets is not constant, then they could need a parser
3805  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3806  && sc->stts_count > 3
3807  && sc->stts_count*10 > st->nb_frames
3808  && sc->time_scale == st->codecpar->sample_rate) {
3810  }
3811  /* Do not need those anymore. */
3812  av_freep(&sc->chunk_offsets);
3813  av_freep(&sc->sample_sizes);
3814  av_freep(&sc->keyframes);
3815  av_freep(&sc->stts_data);
3816  av_freep(&sc->stps_data);
3817  av_freep(&sc->elst_data);
3818  av_freep(&sc->rap_group);
3819 
3820  return 0;
3821 }
3822 
3824 {
3825  int ret;
3826  c->itunes_metadata = 1;
3827  ret = mov_read_default(c, pb, atom);
3828  c->itunes_metadata = 0;
3829  return ret;
3830 }
3831 
3833 {
3834  uint32_t count;
3835  uint32_t i;
3836 
3837  if (atom.size < 8)
3838  return 0;
3839 
3840  avio_skip(pb, 4);
3841  count = avio_rb32(pb);
3842  if (count > UINT_MAX / sizeof(*c->meta_keys) - 1) {
3843  av_log(c->fc, AV_LOG_ERROR,
3844  "The 'keys' atom with the invalid key count: %"PRIu32"\n", count);
3845  return AVERROR_INVALIDDATA;
3846  }
3847 
3848  c->meta_keys_count = count + 1;
3849  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3850  if (!c->meta_keys)
3851  return AVERROR(ENOMEM);
3852 
3853  for (i = 1; i <= count; ++i) {
3854  uint32_t key_size = avio_rb32(pb);
3855  uint32_t type = avio_rl32(pb);
3856  if (key_size < 8) {
3857  av_log(c->fc, AV_LOG_ERROR,
3858  "The key# %"PRIu32" in meta has invalid size:"
3859  "%"PRIu32"\n", i, key_size);
3860  return AVERROR_INVALIDDATA;
3861  }
3862  key_size -= 8;
3863  if (type != MKTAG('m','d','t','a')) {
3864  avio_skip(pb, key_size);
3865  }
3866  c->meta_keys[i] = av_mallocz(key_size + 1);
3867  if (!c->meta_keys[i])
3868  return AVERROR(ENOMEM);
3869  avio_read(pb, c->meta_keys[i], key_size);
3870  }
3871 
3872  return 0;
3873 }
3874 
3876 {
3877  int64_t end = avio_tell(pb) + atom.size;
3878  uint8_t *key = NULL, *val = NULL, *mean = NULL;
3879  int i;
3880  int ret = 0;
3881  AVStream *st;
3882  MOVStreamContext *sc;
3883 
3884  if (c->fc->nb_streams < 1)
3885  return 0;
3886  st = c->fc->streams[c->fc->nb_streams-1];
3887  sc = st->priv_data;
3888 
3889  for (i = 0; i < 3; i++) {
3890  uint8_t **p;
3891  uint32_t len, tag;
3892 
3893  if (end - avio_tell(pb) <= 12)
3894  break;
3895 
3896  len = avio_rb32(pb);
3897  tag = avio_rl32(pb);
3898  avio_skip(pb, 4); // flags
3899 
3900  if (len < 12 || len - 12 > end - avio_tell(pb))
3901  break;
3902  len -= 12;
3903 
3904  if (tag == MKTAG('m', 'e', 'a', 'n'))
3905  p = &mean;
3906  else if (tag == MKTAG('n', 'a', 'm', 'e'))
3907  p = &key;
3908  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3909  avio_skip(pb, 4);
3910  len -= 4;
3911  p = &val;
3912  } else
3913  break;
3914 
3915  *p = av_malloc(len + 1);
3916  if (!*p)
3917  break;
3918  ret = ffio_read_size(pb, *p, len);
3919  if (ret < 0) {
3920  av_freep(p);
3921  break;
3922  }
3923  (*p)[len] = 0;
3924  }
3925 
3926  if (mean && key && val) {
3927  if (strcmp(key, "iTunSMPB") == 0) {
3928  int priming, remainder, samples;
3929  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3930  if(priming>0 && priming<16384)
3931  sc->start_pad = priming;
3932  }
3933  }
3934  if (strcmp(key, "cdec") != 0) {
3935  av_dict_set(&c->fc->metadata, key, val,
3937  key = val = NULL;
3938  }
3939  } else {
3940  av_log(c->fc, AV_LOG_VERBOSE,
3941  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3942  }
3943 
3944  avio_seek(pb, end, SEEK_SET);
3945  av_freep(&key);
3946  av_freep(&val);
3947  av_freep(&mean);
3948  return ret;
3949 }
3950 
3952 {
3953  while (atom.size > 8) {
3954  uint32_t tag = avio_rl32(pb);
3955  atom.size -= 4;
3956  if (tag == MKTAG('h','d','l','r')) {
3957  avio_seek(pb, -8, SEEK_CUR);
3958  atom.size += 8;
3959  return mov_read_default(c, pb, atom);
3960  }
3961  }
3962  return 0;
3963 }
3964 
3965 // return 1 when matrix is identity, 0 otherwise
3966 #define IS_MATRIX_IDENT(matrix) \
3967  ( (matrix)[0][0] == (1 << 16) && \
3968  (matrix)[1][1] == (1 << 16) && \
3969  (matrix)[2][2] == (1 << 30) && \
3970  !(matrix)[0][1] && !(matrix)[0][2] && \
3971  !(matrix)[1][0] && !(matrix)[1][2] && \
3972  !(matrix)[2][0] && !(matrix)[2][1])
3973 
3975 {
3976  int i, j, e;
3977  int width;
3978  int height;
3979  int display_matrix[3][3];
3980  int res_display_matrix[3][3] = { { 0 } };
3981  AVStream *st;
3982  MOVStreamContext *sc;
3983  int version;
3984  int flags;
3985 
3986  if (c->fc->nb_streams < 1)
3987  return 0;
3988  st = c->fc->streams[c->fc->nb_streams-1];
3989  sc = st->priv_data;
3990 
3991  version = avio_r8(pb);
3992  flags = avio_rb24(pb);
3994 
3995  if (version == 1) {
3996  avio_rb64(pb);
3997  avio_rb64(pb);
3998  } else {
3999  avio_rb32(pb); /* creation time */
4000  avio_rb32(pb); /* modification time */
4001  }
4002  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
4003  avio_rb32(pb); /* reserved */
4004 
4005  /* highlevel (considering edits) duration in movie timebase */
4006  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
4007  avio_rb32(pb); /* reserved */
4008  avio_rb32(pb); /* reserved */
4009 
4010  avio_rb16(pb); /* layer */
4011  avio_rb16(pb); /* alternate group */
4012  avio_rb16(pb); /* volume */
4013  avio_rb16(pb); /* reserved */
4014 
4015  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
4016  // they're kept in fixed point format through all calculations
4017  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
4018  // side data, but the scale factor is not needed to calculate aspect ratio
4019  for (i = 0; i < 3; i++) {
4020  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
4021  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
4022  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
4023  }
4024 
4025  width = avio_rb32(pb); // 16.16 fixed point track width
4026  height = avio_rb32(pb); // 16.16 fixed point track height
4027  sc->width = width >> 16;
4028  sc->height = height >> 16;
4029 
4030  // apply the moov display matrix (after the tkhd one)
4031  for (i = 0; i < 3; i++) {
4032  const int sh[3] = { 16, 16, 30 };
4033  for (j = 0; j < 3; j++) {
4034  for (e = 0; e < 3; e++) {
4035  res_display_matrix[i][j] +=
4036  ((int64_t) display_matrix[i][e] *
4037  c->movie_display_matrix[e][j]) >> sh[e];
4038  }
4039  }
4040  }
4041 
4042  // save the matrix when it is not the default identity
4043  if (!IS_MATRIX_IDENT(res_display_matrix)) {
4044  double rotate;
4045 
4046  av_freep(&sc->display_matrix);
4047  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
4048  if (!sc->display_matrix)
4049  return AVERROR(ENOMEM);
4050 
4051  for (i = 0; i < 3; i++)
4052  for (j = 0; j < 3; j++)
4053  sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
4054 
4057  if (!isnan(rotate)) {
4058  char rotate_buf[64];
4059  rotate = -rotate;
4060  if (rotate < 0) // for backward compatibility
4061  rotate += 360;
4062  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
4063  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
4064  }
4065 #endif
4066  }
4067 
4068  // transform the display width/height according to the matrix
4069  // to keep the same scale, use [width height 1<<16]
4070  if (width && height && sc->display_matrix) {
4071  double disp_transform[2];
4072 
4073  for (i = 0; i < 2; i++)
4074  disp_transform[i] = hypot(sc->display_matrix[0 + i],
4075  sc->display_matrix[3 + i]);
4076 
4077  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
4078  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
4079  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
4081  disp_transform[0] / disp_transform[1],
4082  INT_MAX);
4083  }
4084  return 0;
4085 }
4086 
4088 {
4089  MOVFragment *frag = &c->fragment;
4090  MOVTrackExt *trex = NULL;
4092  int flags, track_id, i, found = 0;
4093 
4094  avio_r8(pb); /* version */
4095  flags = avio_rb24(pb);
4096 
4097  track_id = avio_rb32(pb);
4098  if (!track_id)
4099  return AVERROR_INVALIDDATA;
4100  frag->track_id = track_id;
4101  for (i = 0; i < c->trex_count; i++)
4102  if (c->trex_data[i].track_id == frag->track_id) {
4103  trex = &c->trex_data[i];
4104  break;
4105  }
4106  if (!trex) {
4107  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
4108  return AVERROR_INVALIDDATA;
4109  }
4110 
4113  frag->moof_offset : frag->implicit_offset;
4114  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
4115 
4116  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
4117  avio_rb32(pb) : trex->duration;
4118  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
4119  avio_rb32(pb) : trex->size;
4120  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
4121  avio_rb32(pb) : trex->flags;
4122  frag->time = AV_NOPTS_VALUE;
4123  for (i = 0; i < c->fragment_index_count; i++) {
4124  int j;
4125  MOVFragmentIndex* candidate = c->fragment_index_data[i];
4126  if (candidate->track_id == frag->track_id) {
4127  av_log(c->fc, AV_LOG_DEBUG,
4128  "found fragment index for track %u\n", frag->track_id);
4129  index = candidate;
4130  for (j = index->current_item; j < index->item_count; j++) {
4131  if (frag->implicit_offset == index->items[j].moof_offset) {
4132  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
4133  "for track %u and moof_offset %"PRId64"\n",
4134  frag->track_id, index->items[j].moof_offset);
4135  frag->time = index->items[j].time;
4136  index->current_item = j + 1;
4137  found = 1;
4138  break;
4139  }
4140  }
4141  if (found)
4142  break;
4143  }
4144  }
4145  if (index && !found) {
4146  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
4147  "it doesn't have an (in-order) entry for moof_offset "
4148  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
4149  }
4150  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
4151  return 0;
4152 }
4153 
4155 {
4156  unsigned i, num;
4157  void *new_tracks;
4158 
4159  num = atom.size / 4;
4160  if (!(new_tracks = av_malloc_array(num, sizeof(int))))
4161  return AVERROR(ENOMEM);
4162 
4163  av_free(c->chapter_tracks);
4164  c->chapter_tracks = new_tracks;
4165  c->nb_chapter_tracks = num;
4166 
4167  for (i = 0; i < num && !pb->eof_reached; i++)
4168  c->chapter_tracks[i] = avio_rb32(pb);
4169 
4170  return 0;
4171 }
4172 
4174 {
4175  MOVTrackExt *trex;
4176  int err;
4177 
4178  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
4179  return AVERROR_INVALIDDATA;
4180  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
4181  sizeof(*c->trex_data))) < 0) {
4182  c->trex_count = 0;
4183  return err;
4184  }
4185 
4186  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
4187 
4188  trex = &c->trex_data[c->trex_count++];
4189  avio_r8(pb); /* version */
4190  avio_rb24(pb); /* flags */
4191  trex->track_id = avio_rb32(pb);
4192  trex->stsd_id = avio_rb32(pb);
4193  trex->duration = avio_rb32(pb);
4194  trex->size = avio_rb32(pb);
4195  trex->flags = avio_rb32(pb);
4196  return 0;
4197 }
4198 
4200 {
4201  MOVFragment *frag = &c->fragment;
4202  AVStream *st = NULL;
4203  MOVStreamContext *sc;
4204  int version, i;
4205 
4206  for (i = 0; i < c->fc->nb_streams; i++) {
4207  if (c->fc->streams[i]->id == frag->track_id) {
4208  st = c->fc->streams[i];
4209  break;
4210  }
4211  }
4212  if (!st) {
4213  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4214  return AVERROR_INVALIDDATA;
4215  }
4216  sc = st->priv_data;
4217  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
4218  return 0;
4219  version = avio_r8(pb);
4220  avio_rb24(pb); /* flags */
4221  if (version) {
4222  sc->track_end = avio_rb64(pb);
4223  } else {
4224  sc->track_end = avio_rb32(pb);
4225  }
4226  return 0;
4227 }
4228 
4230 {
4231  MOVFragment *frag = &c->fragment;
4232  AVStream *st = NULL;
4233  MOVStreamContext *sc;
4234  MOVStts *ctts_data;
4235  uint64_t offset;
4236  int64_t dts;
4237  int data_offset = 0;
4238  unsigned entries, first_sample_flags = frag->flags;
4239  int flags, distance, i, err;
4240 
4241  for (i = 0; i < c->fc->nb_streams; i++) {
4242  if (c->fc->streams[i]->id == frag->track_id) {
4243  st = c->fc->streams[i];
4244  break;
4245  }
4246  }
4247  if (!st) {
4248  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4249  return AVERROR_INVALIDDATA;
4250  }
4251  sc = st->priv_data;
4252  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4253  return 0;
4254  avio_r8(pb); /* version */
4255  flags = avio_rb24(pb);
4256  entries = avio_rb32(pb);
4257  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %u\n", flags, entries);
4258 
4259  /* Always assume the presence of composition time offsets.
4260  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
4261  * 1) in the initial movie, there are no samples.
4262  * 2) in the first movie fragment, there is only one sample without composition time offset.
4263  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
4264  if (!sc->ctts_count && sc->sample_count)
4265  {
4266  /* Complement ctts table if moov atom doesn't have ctts atom. */
4267  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
4268  if (!ctts_data)
4269  return AVERROR(ENOMEM);
4270  sc->ctts_data = ctts_data;
4271  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
4272  sc->ctts_data[sc->ctts_count].duration = 0;
4273  sc->ctts_count++;
4274  }
4275  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
4276  return AVERROR_INVALIDDATA;
4277  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
4278  sizeof(*sc->ctts_data))) < 0) {
4279  sc->ctts_count = 0;
4280  return err;
4281  }
4282  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
4283  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
4284  dts = sc->track_end - sc->time_offset;
4285  offset = frag->base_data_offset + data_offset;
4286  distance = 0;
4287  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
4288  for (i = 0; i < entries && !pb->eof_reached; i++) {
4289  unsigned sample_size = frag->size;
4290  int sample_flags = i ? frag->flags : first_sample_flags;
4291  unsigned sample_duration = frag->duration;
4292  int keyframe = 0;
4293 
4294  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
4295  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
4296  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
4297  sc->ctts_data[sc->ctts_count].count = 1;
4298  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
4299  avio_rb32(pb) : 0;
4301  if (frag->time != AV_NOPTS_VALUE) {
4302  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
4303  int64_t pts = frag->time;
4304  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4305  " sc->dts_shift %d ctts.duration %d"
4306  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
4307  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
4308  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
4309  dts = pts - sc->dts_shift;
4310  if (flags & MOV_TRUN_SAMPLE_CTS) {
4311  dts -= sc->ctts_data[sc->ctts_count].duration;
4312  } else {
4313  dts -= sc->time_offset;
4314  }
4315  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
4316  } else {
4317  dts = frag->time - sc->time_offset;
4318  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4319  ", using it for dts\n", dts);
4320  }
4321  frag->time = AV_NOPTS_VALUE;
4322  }
4323  sc->ctts_count++;
4325  keyframe = 1;
4326  else
4327  keyframe =
4328  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
4330  if (keyframe)
4331  distance = 0;
4332  err = av_add_index_entry(st, offset, dts, sample_size, distance,
4333  keyframe ? AVINDEX_KEYFRAME : 0);
4334  if (err < 0) {
4335  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
4336  }
4337  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
4338  "size %u, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
4339  offset, dts, sample_size, distance, keyframe);
4340  distance++;
4341  dts += sample_duration;
4342  offset += sample_size;
4343  sc->data_size += sample_size;
4344  sc->duration_for_fps += sample_duration;
4345  sc->nb_frames_for_fps ++;
4346  }
4347 
4348  if (pb->eof_reached)
4349  return AVERROR_EOF;
4350 
4351  frag->implicit_offset = offset;
4352 
4353  sc->track_end = dts + sc->time_offset;
4354  if (st->duration < sc->track_end)
4355  st->duration = sc->track_end;
4356 
4357  return 0;
4358 }
4359 
4361 {
4362  int64_t offset = avio_tell(pb) + atom.size, pts;
4363  uint8_t version;
4364  unsigned i, track_id;
4365  AVStream *st = NULL;
4366  AVStream *ref_st = NULL;
4367  MOVStreamContext *sc, *ref_sc = NULL;
4370  AVRational timescale;
4371 
4372  version = avio_r8(pb);
4373  if (version > 1) {
4374  avpriv_request_sample(c->fc, "sidx version %u", version);
4375  return 0;
4376  }
4377 
4378  avio_rb24(pb); // flags
4379 
4380  track_id = avio_rb32(pb); // Reference ID
4381  for (i = 0; i < c->fc->nb_streams; i++) {
4382  if (c->fc->streams[i]->id == track_id) {
4383  st = c->fc->streams[i];
4384  break;
4385  }
4386  }
4387  if (!st) {
4388  av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
4389  return 0;
4390  }
4391 
4392  sc = st->priv_data;
4393 
4394  timescale = av_make_q(1, avio_rb32(pb));
4395 
4396  if (timescale.den <= 0) {
4397  av_log(c->fc, AV_LOG_ERROR, "Invalid sidx timescale 1/%d\n", timescale.den);
4398  return AVERROR_INVALIDDATA;
4399  }
4400 
4401  if (version == 0) {
4402  pts = avio_rb32(pb);
4403  offset += avio_rb32(pb);
4404  } else {
4405  pts = avio_rb64(pb);
4406  offset += avio_rb64(pb);
4407  }
4408 
4409  avio_rb16(pb); // reserved
4410 
4411  index = av_mallocz(sizeof(MOVFragmentIndex));
4412  if (!index)
4413  return AVERROR(ENOMEM);
4414 
4415  index->track_id = track_id;
4416 
4417  index->item_count = avio_rb16(pb);
4418  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
4419 
4420  if (!index->items) {
4421  av_freep(&index);
4422  return AVERROR(ENOMEM);
4423  }
4424 
4425  for (i = 0; i < index->item_count; i++) {
4426  uint32_t size = avio_rb32(pb);
4427  uint32_t duration = avio_rb32(pb);
4428  if (size & 0x80000000) {
4429  avpriv_request_sample(c->fc, "sidx reference_type 1");
4430  av_freep(&index->items);
4431  av_freep(&index);
4432  return AVERROR_PATCHWELCOME;
4433  }
4434  avio_rb32(pb); // sap_flags
4435  index->items[i].moof_offset = offset;
4436  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
4437  offset += size;
4438  pts += duration;
4439  }
4440 
4441  st->duration = sc->track_end = pts;
4442 
4444  c->fragment_index_count + 1,
4445  sizeof(MOVFragmentIndex*));
4446  if (!tmp) {
4447  av_freep(&index->items);
4448  av_freep(&index);
4449  return AVERROR(ENOMEM);
4450  }
4451 
4452  c->fragment_index_data = tmp;
4454  sc->has_sidx = 1;
4455 
4456  if (offset == avio_size(pb)) {
4457  for (i = 0; i < c->fc->nb_streams; i++) {
4458  if (c->fc->streams[i]->id == c->fragment_index_data[0]->track_id) {
4459  ref_st = c->fc->streams[i];
4460  ref_sc = ref_st->priv_data;
4461  break;
4462  }
4463  }
4464  for (i = 0; i < c->fc->nb_streams; i++) {
4465  st = c->fc->streams[i];
4466  sc = st->priv_data;
4467  if (!sc->has_sidx) {
4468  st->duration = sc->track_end = av_rescale(ref_st->duration, sc->time_scale, ref_sc->time_scale);
4469  }
4470  }
4471 
4472  c->fragment_index_complete = 1;
4473  }
4474 
4475  return 0;
4476 }
4477 
4478 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
4479 /* like the files created with Adobe Premiere 5.0, for samples see */
4480 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
4482 {
4483  int err;
4484 
4485  if (atom.size < 8)
4486  return 0; /* continue */
4487  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
4488  avio_skip(pb, atom.size - 4);
4489  return 0;
4490  }
4491  atom.type = avio_rl32(pb);
4492  atom.size -= 8;
4493  if (atom.type != MKTAG('m','d','a','t')) {
4494  avio_skip(pb, atom.size);
4495  return 0;
4496  }
4497  err = mov_read_mdat(c, pb, atom);
4498  return err;
4499 }
4500 
4502 {
4503 #if CONFIG_ZLIB
4504  AVIOContext ctx;
4505  uint8_t *cmov_data;
4506  uint8_t *moov_data; /* uncompressed data */
4507  long cmov_len, moov_len;
4508  int ret = -1;
4509 
4510  avio_rb32(pb); /* dcom atom */
4511  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
4512  return AVERROR_INVALIDDATA;
4513  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
4514  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
4515  return AVERROR_INVALIDDATA;
4516  }
4517  avio_rb32(pb); /* cmvd atom */
4518  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
4519  return AVERROR_INVALIDDATA;
4520  moov_len = avio_rb32(pb); /* uncompressed size */
4521  cmov_len = atom.size - 6 * 4;
4522 
4523  cmov_data = av_malloc(cmov_len);
4524  if (!cmov_data)
4525  return AVERROR(ENOMEM);
4526  moov_data = av_malloc(moov_len);
4527  if (!moov_data) {
4528  av_free(cmov_data);
4529  return AVERROR(ENOMEM);
4530  }
4531  ret = ffio_read_size(pb, cmov_data, cmov_len);
4532  if (ret < 0)
4533  goto free_and_return;
4534 
4535  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
4536  goto free_and_return;
4537  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
4538  goto free_and_return;
4540  atom.type = MKTAG('m','o','o','v');
4541  atom.size = moov_len;
4542  ret = mov_read_default(c, &ctx, atom);
4543 free_and_return:
4544  av_free(moov_data);
4545  av_free(cmov_data);
4546  return ret;
4547 #else
4548  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
4549  return AVERROR(ENOSYS);
4550 #endif
4551 }
4552 
4553 /* edit list atom */
4555 {
4556  MOVStreamContext *sc;
4557  int i, edit_count, version;
4558 
4559  if (c->fc->nb_streams < 1 || c->ignore_editlist)
4560  return 0;
4561  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
4562 
4563  version = avio_r8(pb); /* version */
4564  avio_rb24(pb); /* flags */
4565  edit_count = avio_rb32(pb); /* entries */
4566 
4567  if (!edit_count)
4568  return 0;
4569  if (sc->elst_data)
4570  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
4571  av_free(sc->elst_data);
4572  sc->elst_count = 0;
4573  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
4574  if (!sc->elst_data)
4575  return AVERROR(ENOMEM);
4576 
4577  av_log(c->fc, AV_LOG_TRACE, "track[%u].edit_count = %i\n", c->fc->nb_streams - 1, edit_count);
4578  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
4579  MOVElst *e = &sc->elst_data[i];
4580 
4581  if (version == 1) {
4582  e->duration = avio_rb64(pb);
4583  e->time = avio_rb64(pb);
4584  } else {
4585  e->duration = avio_rb32(pb); /* segment duration */
4586  e->time = (int32_t)avio_rb32(pb); /* media time */
4587  }
4588  e->rate = avio_rb32(pb) / 65536.0;
4589  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
4590  e->duration, e->time, e->rate);
4591 
4592  if (e->time < 0 && e->time != -1 &&
4594  av_log(c->fc, AV_LOG_ERROR, "Track %d, edit %d: Invalid edit list media time=%"PRId64"\n",
4595  c->fc->nb_streams-1, i, e->time);
4596  return AVERROR_INVALIDDATA;
4597  }
4598  }
4599  sc->elst_count = i;
4600 
4601  return 0;
4602 }
4603 
4605 {
4606  MOVStreamContext *sc;
4607 
4608  if (c->fc->nb_streams < 1)
4609  return AVERROR_INVALIDDATA;
4610  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4611  sc->timecode_track = avio_rb32(pb);
4612  return 0;
4613 }
4614 
4616 {
4617  AVStream *st;
4618  MOVStreamContext *sc;
4619  enum AVStereo3DType type;
4620  int mode;
4621 
4622  if (c->fc->nb_streams < 1)
4623  return 0;
4624 
4625  st = c->fc->streams[c->fc->nb_streams - 1];
4626  sc = st->priv_data;
4627 
4628  if (atom.size < 5) {
4629  av_log(c->fc, AV_LOG_ERROR, "Empty stereoscopic video box\n");
4630  return AVERROR_INVALIDDATA;
4631  }
4632  avio_skip(pb, 4); /* version + flags */
4633 
4634  mode = avio_r8(pb);
4635  switch (mode) {
4636  case 0:
4637  type = AV_STEREO3D_2D;
4638  break;
4639  case 1:
4640  type = AV_STEREO3D_TOPBOTTOM;
4641  break;
4642  case 2:
4643  type = AV_STEREO3D_SIDEBYSIDE;
4644  break;
4645  default:
4646  av_log(c->fc, AV_LOG_WARNING, "Unknown st3d mode value %d\n", mode);
4647  return 0;
4648  }
4649 
4650  sc->stereo3d = av_stereo3d_alloc();
4651  if (!sc->stereo3d)
4652  return AVERROR(ENOMEM);
4653 
4654  sc->stereo3d->type = type;
4655  return 0;
4656 }
4657 
4659 {
4660  AVStream *st;
4661  MOVStreamContext *sc;
4662  int size, layout;
4663  int32_t yaw, pitch, roll;
4664  uint32_t l = 0, t = 0, r = 0, b = 0;
4665  uint32_t tag, padding = 0;
4666  enum AVSphericalProjection projection;
4667 
4668  if (c->fc->nb_streams < 1)
4669  return 0;
4670 
4671  st = c->fc->streams[c->fc->nb_streams - 1];
4672  sc = st->priv_data;
4673 
4674  if (atom.size < 8) {
4675  av_log(c->fc, AV_LOG_ERROR, "Empty spherical video box\n");
4676  return AVERROR_INVALIDDATA;
4677  }
4678 
4679  size = avio_rb32(pb);
4680  if (size <= 12 || size > atom.size)
4681  return AVERROR_INVALIDDATA;
4682 
4683  tag = avio_rl32(pb);
4684  if (tag != MKTAG('s','v','h','d')) {
4685  av_log(c->fc, AV_LOG_ERROR, "Missing spherical video header\n");
4686  return 0;
4687  }
4688  avio_skip(pb, 4); /* version + flags */
4689  avio_skip(pb, size - 12); /* metadata_source */
4690 
4691  size = avio_rb32(pb);
4692  if (size > atom.size)
4693  return AVERROR_INVALIDDATA;
4694 
4695  tag = avio_rl32(pb);
4696  if (tag != MKTAG('p','r','o','j')) {
4697  av_log(c->fc, AV_LOG_ERROR, "Missing projection box\n");
4698  return 0;
4699  }
4700 
4701  size = avio_rb32(pb);
4702  if (size > atom.size)
4703  return AVERROR_INVALIDDATA;
4704 
4705  tag = avio_rl32(pb);
4706  if (tag != MKTAG('p','r','h','d')) {
4707  av_log(c->fc, AV_LOG_ERROR, "Missing projection header box\n");
4708  return 0;
4709  }
4710  <