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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/sha.h"
45 #include "libavutil/spherical.h"
46 #include "libavutil/stereo3d.h"
47 #include "libavutil/timecode.h"
48 #include "libavcodec/ac3tab.h"
49 #include "libavcodec/flac.h"
51 #include "avformat.h"
52 #include "internal.h"
53 #include "avio_internal.h"
54 #include "riff.h"
55 #include "isom.h"
56 #include "libavcodec/get_bits.h"
57 #include "id3v1.h"
58 #include "mov_chan.h"
59 #include "replaygain.h"
60 
61 #if CONFIG_ZLIB
62 #include <zlib.h>
63 #endif
64 
65 #include "qtpalette.h"
66 
67 /* those functions parse an atom */
68 /* links atom IDs to parse functions */
69 typedef struct MOVParseTableEntry {
70  uint32_t type;
73 
74 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
75 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
76 
78  unsigned len, const char *key)
79 {
80  char buf[16];
81 
82  short current, total = 0;
83  avio_rb16(pb); // unknown
84  current = avio_rb16(pb);
85  if (len >= 6)
86  total = avio_rb16(pb);
87  if (!total)
88  snprintf(buf, sizeof(buf), "%d", current);
89  else
90  snprintf(buf, sizeof(buf), "%d/%d", current, total);
92  av_dict_set(&c->fc->metadata, key, buf, 0);
93 
94  return 0;
95 }
96 
98  unsigned len, const char *key)
99 {
100  /* bypass padding bytes */
101  avio_r8(pb);
102  avio_r8(pb);
103  avio_r8(pb);
104 
106  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
107 
108  return 0;
109 }
110 
112  unsigned len, const char *key)
113 {
115  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
116 
117  return 0;
118 }
119 
121  unsigned len, const char *key)
122 {
123  short genre;
124 
125  avio_r8(pb); // unknown
126 
127  genre = avio_r8(pb);
128  if (genre < 1 || genre > ID3v1_GENRE_MAX)
129  return 0;
131  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
132 
133  return 0;
134 }
135 
136 static const uint32_t mac_to_unicode[128] = {
137  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
138  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
139  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
140  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
141  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
142  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
143  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
144  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
145  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
146  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
147  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
148  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
149  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
150  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
151  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
152  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
153 };
154 
156  char *dst, int dstlen)
157 {
158  char *p = dst;
159  char *end = dst+dstlen-1;
160  int i;
161 
162  for (i = 0; i < len; i++) {
163  uint8_t t, c = avio_r8(pb);
164  if (c < 0x80 && p < end)
165  *p++ = c;
166  else if (p < end)
167  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
168  }
169  *p = 0;
170  return p - dst;
171 }
172 
173 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
174 {
175  AVPacket pkt;
176  AVStream *st;
177  MOVStreamContext *sc;
178  enum AVCodecID id;
179  int ret;
180 
181  switch (type) {
182  case 0xd: id = AV_CODEC_ID_MJPEG; break;
183  case 0xe: id = AV_CODEC_ID_PNG; break;
184  case 0x1b: id = AV_CODEC_ID_BMP; break;
185  default:
186  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
187  avio_skip(pb, len);
188  return 0;
189  }
190 
191  st = avformat_new_stream(c->fc, NULL);
192  if (!st)
193  return AVERROR(ENOMEM);
194  sc = av_mallocz(sizeof(*sc));
195  if (!sc)
196  return AVERROR(ENOMEM);
197  st->priv_data = sc;
198 
199  ret = av_get_packet(pb, &pkt, len);
200  if (ret < 0)
201  return ret;
202 
203  if (pkt.size >= 8 && id != AV_CODEC_ID_BMP) {
204  if (AV_RB64(pkt.data) == 0x89504e470d0a1a0a) {
205  id = AV_CODEC_ID_PNG;
206  } else {
207  id = AV_CODEC_ID_MJPEG;
208  }
209  }
210 
212 
213  st->attached_pic = pkt;
214  st->attached_pic.stream_index = st->index;
216 
218  st->codecpar->codec_id = id;
219 
220  return 0;
221 }
222 
223 // 3GPP TS 26.244
224 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
225 {
226  char language[4] = { 0 };
227  char buf[200], place[100];
228  uint16_t langcode = 0;
229  double longitude, latitude, altitude;
230  const char *key = "location";
231 
232  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
233  av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
234  return AVERROR_INVALIDDATA;
235  }
236 
237  avio_skip(pb, 4); // version+flags
238  langcode = avio_rb16(pb);
239  ff_mov_lang_to_iso639(langcode, language);
240  len -= 6;
241 
242  len -= avio_get_str(pb, len, place, sizeof(place));
243  if (len < 1) {
244  av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
245  return AVERROR_INVALIDDATA;
246  }
247  avio_skip(pb, 1); // role
248  len -= 1;
249 
250  if (len < 12) {
251  av_log(c->fc, AV_LOG_ERROR,
252  "loci too short (%u bytes left, need at least %d)\n", len, 12);
253  return AVERROR_INVALIDDATA;
254  }
255  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
256  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
257  altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
258 
259  // Try to output in the same format as the ?xyz field
260  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
261  if (altitude)
262  av_strlcatf(buf, sizeof(buf), "%+f", altitude);
263  av_strlcatf(buf, sizeof(buf), "/%s", place);
264 
265  if (*language && strcmp(language, "und")) {
266  char key2[16];
267  snprintf(key2, sizeof(key2), "%s-%s", key, language);
268  av_dict_set(&c->fc->metadata, key2, buf, 0);
269  }
271  return av_dict_set(&c->fc->metadata, key, buf, 0);
272 }
273 
274 static int mov_metadata_hmmt(MOVContext *c, AVIOContext *pb, unsigned len)
275 {
276  int i, n_hmmt;
277 
278  if (len < 2)
279  return 0;
280  if (c->ignore_chapters)
281  return 0;
282 
283  n_hmmt = avio_rb32(pb);
284  for (i = 0; i < n_hmmt && !pb->eof_reached; i++) {
285  int moment_time = avio_rb32(pb);
286  avpriv_new_chapter(c->fc, i, av_make_q(1, 1000), moment_time, AV_NOPTS_VALUE, NULL);
287  }
288  return 0;
289 }
290 
292 {
293  char tmp_key[5];
294  char key2[32], language[4] = {0};
295  char *str = NULL;
296  const char *key = NULL;
297  uint16_t langcode = 0;
298  uint32_t data_type = 0, str_size, str_size_alloc;
299  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
300  int raw = 0;
301  int num = 0;
302 
303  switch (atom.type) {
304  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
305  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
306  case MKTAG( 'X','M','P','_'):
307  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
308  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
309  case MKTAG( 'a','k','I','D'): key = "account_type";
311  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
312  case MKTAG( 'c','a','t','g'): key = "category"; break;
313  case MKTAG( 'c','p','i','l'): key = "compilation";
315  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
316  case MKTAG( 'd','e','s','c'): key = "description"; break;
317  case MKTAG( 'd','i','s','k'): key = "disc";
319  case MKTAG( 'e','g','i','d'): key = "episode_uid";
321  case MKTAG( 'F','I','R','M'): key = "firmware"; raw = 1; break;
322  case MKTAG( 'g','n','r','e'): key = "genre";
323  parse = mov_metadata_gnre; break;
324  case MKTAG( 'h','d','v','d'): key = "hd_video";
326  case MKTAG( 'H','M','M','T'):
327  return mov_metadata_hmmt(c, pb, atom.size);
328  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
329  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
330  case MKTAG( 'l','o','c','i'):
331  return mov_metadata_loci(c, pb, atom.size);
332  case MKTAG( 'p','c','s','t'): key = "podcast";
334  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
336  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
337  case MKTAG( 'r','t','n','g'): key = "rating";
339  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
340  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
341  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
342  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
343  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
344  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
345  case MKTAG( 's','t','i','k'): key = "media_type";
347  case MKTAG( 't','r','k','n'): key = "track";
349  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
350  case MKTAG( 't','v','e','s'): key = "episode_sort";
352  case MKTAG( 't','v','n','n'): key = "network"; break;
353  case MKTAG( 't','v','s','h'): key = "show"; break;
354  case MKTAG( 't','v','s','n'): key = "season_number";
356  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
357  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
358  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
359  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
360  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
361  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
362  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
363  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
364  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
365  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
366  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
367  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
368  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
369  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
370  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
371  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
372  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
373  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
374  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
375  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
376  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
377  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
378  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
379  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
380  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
381  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
382  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
383  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
384  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
385  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
386  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
387  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
388  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
389  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
390  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
391  }
392 retry:
393  if (c->itunes_metadata && atom.size > 8) {
394  int data_size = avio_rb32(pb);
395  int tag = avio_rl32(pb);
396  if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
397  data_type = avio_rb32(pb); // type
398  avio_rb32(pb); // unknown
399  str_size = data_size - 16;
400  atom.size -= 16;
401 
402  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
403  int ret = mov_read_covr(c, pb, data_type, str_size);
404  if (ret < 0) {
405  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
406  }
407  return ret;
408  } else if (!key && c->found_hdlr_mdta && c->meta_keys) {
409  uint32_t index = AV_RB32(&atom.type);
410  if (index < c->meta_keys_count && index > 0) {
411  key = c->meta_keys[index];
412  } else {
414  "The index of 'data' is out of range: %d < 1 or >= %d.\n",
415  index, c->meta_keys_count);
416  }
417  }
418  } else return 0;
419  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
420  str_size = avio_rb16(pb); // string length
421  if (str_size > atom.size) {
422  raw = 1;
423  avio_seek(pb, -2, SEEK_CUR);
424  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
425  goto retry;
426  }
427  langcode = avio_rb16(pb);
428  ff_mov_lang_to_iso639(langcode, language);
429  atom.size -= 4;
430  } else
431  str_size = atom.size;
432 
433  if (c->export_all && !key) {
434  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
435  key = tmp_key;
436  }
437 
438  if (!key)
439  return 0;
440  if (atom.size < 0 || str_size >= INT_MAX/2)
441  return AVERROR_INVALIDDATA;
442 
443  // Allocates enough space if data_type is a int32 or float32 number, otherwise
444  // worst-case requirement for output string in case of utf8 coded input
445  num = (data_type >= 21 && data_type <= 23);
446  str_size_alloc = (num ? 512 : (raw ? str_size : str_size * 2)) + 1;
447  str = av_mallocz(str_size_alloc);
448  if (!str)
449  return AVERROR(ENOMEM);
450 
451  if (parse)
452  parse(c, pb, str_size, key);
453  else {
454  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
455  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
456  } else if (data_type == 21) { // BE signed integer, variable size
457  int val = 0;
458  if (str_size == 1)
459  val = (int8_t)avio_r8(pb);
460  else if (str_size == 2)
461  val = (int16_t)avio_rb16(pb);
462  else if (str_size == 3)
463  val = ((int32_t)(avio_rb24(pb)<<8))>>8;
464  else if (str_size == 4)
465  val = (int32_t)avio_rb32(pb);
466  if (snprintf(str, str_size_alloc, "%d", val) >= str_size_alloc) {
467  av_log(c->fc, AV_LOG_ERROR,
468  "Failed to store the number (%d) in string.\n", val);
469  av_free(str);
470  return AVERROR_INVALIDDATA;
471  }
472  } else if (data_type == 22) { // BE unsigned integer, variable size
473  unsigned int val = 0;
474  if (str_size == 1)
475  val = avio_r8(pb);
476  else if (str_size == 2)
477  val = avio_rb16(pb);
478  else if (str_size == 3)
479  val = avio_rb24(pb);
480  else if (str_size == 4)
481  val = avio_rb32(pb);
482  if (snprintf(str, str_size_alloc, "%u", val) >= str_size_alloc) {
483  av_log(c->fc, AV_LOG_ERROR,
484  "Failed to store the number (%u) in string.\n", val);
485  av_free(str);
486  return AVERROR_INVALIDDATA;
487  }
488  } else if (data_type == 23 && str_size >= 4) { // BE float32
489  float val = av_int2float(avio_rb32(pb));
490  if (snprintf(str, str_size_alloc, "%f", val) >= str_size_alloc) {
491  av_log(c->fc, AV_LOG_ERROR,
492  "Failed to store the float32 number (%f) in string.\n", val);
493  av_free(str);
494  return AVERROR_INVALIDDATA;
495  }
496  } else {
497  int ret = ffio_read_size(pb, str, str_size);
498  if (ret < 0) {
499  av_free(str);
500  return ret;
501  }
502  str[str_size] = 0;
503  }
505  av_dict_set(&c->fc->metadata, key, str, 0);
506  if (*language && strcmp(language, "und")) {
507  snprintf(key2, sizeof(key2), "%s-%s", key, language);
508  av_dict_set(&c->fc->metadata, key2, str, 0);
509  }
510  if (!strcmp(key, "encoder")) {
511  int major, minor, micro;
512  if (sscanf(str, "HandBrake %d.%d.%d", &major, &minor, &micro) == 3) {
513  c->handbrake_version = 1000000*major + 1000*minor + micro;
514  }
515  }
516  }
517  av_log(c->fc, AV_LOG_TRACE, "lang \"%3s\" ", language);
518  av_log(c->fc, AV_LOG_TRACE, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
519  key, str, (char*)&atom.type, str_size_alloc, atom.size);
520 
521  av_freep(&str);
522  return 0;
523 }
524 
526 {
527  int64_t start;
528  int i, nb_chapters, str_len, version;
529  char str[256+1];
530  int ret;
531 
532  if (c->ignore_chapters)
533  return 0;
534 
535  if ((atom.size -= 5) < 0)
536  return 0;
537 
538  version = avio_r8(pb);
539  avio_rb24(pb);
540  if (version)
541  avio_rb32(pb); // ???
542  nb_chapters = avio_r8(pb);
543 
544  for (i = 0; i < nb_chapters; i++) {
545  if (atom.size < 9)
546  return 0;
547 
548  start = avio_rb64(pb);
549  str_len = avio_r8(pb);
550 
551  if ((atom.size -= 9+str_len) < 0)
552  return 0;
553 
554  ret = ffio_read_size(pb, str, str_len);
555  if (ret < 0)
556  return ret;
557  str[str_len] = 0;
558  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
559  }
560  return 0;
561 }
562 
563 #define MIN_DATA_ENTRY_BOX_SIZE 12
565 {
566  AVStream *st;
567  MOVStreamContext *sc;
568  int entries, i, j;
569 
570  if (c->fc->nb_streams < 1)
571  return 0;
572  st = c->fc->streams[c->fc->nb_streams-1];
573  sc = st->priv_data;
574 
575  avio_rb32(pb); // version + flags
576  entries = avio_rb32(pb);
577  if (!entries ||
578  entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
579  entries >= UINT_MAX / sizeof(*sc->drefs))
580  return AVERROR_INVALIDDATA;
581  sc->drefs_count = 0;
582  av_free(sc->drefs);
583  sc->drefs_count = 0;
584  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
585  if (!sc->drefs)
586  return AVERROR(ENOMEM);
587  sc->drefs_count = entries;
588 
589  for (i = 0; i < entries; i++) {
590  MOVDref *dref = &sc->drefs[i];
591  uint32_t size = avio_rb32(pb);
592  int64_t next = avio_tell(pb) + size - 4;
593 
594  if (size < 12)
595  return AVERROR_INVALIDDATA;
596 
597  dref->type = avio_rl32(pb);
598  avio_rb32(pb); // version + flags
599  av_log(c->fc, AV_LOG_TRACE, "type %.4s size %d\n", (char*)&dref->type, size);
600 
601  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
602  /* macintosh alias record */
603  uint16_t volume_len, len;
604  int16_t type;
605  int ret;
606 
607  avio_skip(pb, 10);
608 
609  volume_len = avio_r8(pb);
610  volume_len = FFMIN(volume_len, 27);
611  ret = ffio_read_size(pb, dref->volume, 27);
612  if (ret < 0)
613  return ret;
614  dref->volume[volume_len] = 0;
615  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
616 
617  avio_skip(pb, 12);
618 
619  len = avio_r8(pb);
620  len = FFMIN(len, 63);
621  ret = ffio_read_size(pb, dref->filename, 63);
622  if (ret < 0)
623  return ret;
624  dref->filename[len] = 0;
625  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
626 
627  avio_skip(pb, 16);
628 
629  /* read next level up_from_alias/down_to_target */
630  dref->nlvl_from = avio_rb16(pb);
631  dref->nlvl_to = avio_rb16(pb);
632  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
633  dref->nlvl_from, dref->nlvl_to);
634 
635  avio_skip(pb, 16);
636 
637  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
638  if(avio_feof(pb))
639  return AVERROR_EOF;
640  type = avio_rb16(pb);
641  len = avio_rb16(pb);
642  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
643  if (len&1)
644  len += 1;
645  if (type == 2) { // absolute path
646  av_free(dref->path);
647  dref->path = av_mallocz(len+1);
648  if (!dref->path)
649  return AVERROR(ENOMEM);
650 
651  ret = ffio_read_size(pb, dref->path, len);
652  if (ret < 0) {
653  av_freep(&dref->path);
654  return ret;
655  }
656  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
657  len -= volume_len;
658  memmove(dref->path, dref->path+volume_len, len);
659  dref->path[len] = 0;
660  }
661  // trim string of any ending zeros
662  for (j = len - 1; j >= 0; j--) {
663  if (dref->path[j] == 0)
664  len--;
665  else
666  break;
667  }
668  for (j = 0; j < len; j++)
669  if (dref->path[j] == ':' || dref->path[j] == 0)
670  dref->path[j] = '/';
671  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
672  } else if (type == 0) { // directory name
673  av_free(dref->dir);
674  dref->dir = av_malloc(len+1);
675  if (!dref->dir)
676  return AVERROR(ENOMEM);
677 
678  ret = ffio_read_size(pb, dref->dir, len);
679  if (ret < 0) {
680  av_freep(&dref->dir);
681  return ret;
682  }
683  dref->dir[len] = 0;
684  for (j = 0; j < len; j++)
685  if (dref->dir[j] == ':')
686  dref->dir[j] = '/';
687  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
688  } else
689  avio_skip(pb, len);
690  }
691  } else {
692  av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x%08x size %d\n",
693  dref->type, size);
694  entries--;
695  i--;
696  }
697  avio_seek(pb, next, SEEK_SET);
698  }
699  return 0;
700 }
701 
703 {
704  AVStream *st;
705  uint32_t type;
706  uint32_t av_unused ctype;
707  int64_t title_size;
708  char *title_str;
709  int ret;
710 
711  avio_r8(pb); /* version */
712  avio_rb24(pb); /* flags */
713 
714  /* component type */
715  ctype = avio_rl32(pb);
716  type = avio_rl32(pb); /* component subtype */
717 
718  av_log(c->fc, AV_LOG_TRACE, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
719  av_log(c->fc, AV_LOG_TRACE, "stype= %.4s\n", (char*)&type);
720 
721  if (c->trak_index < 0) { // meta not inside a trak
722  if (type == MKTAG('m','d','t','a')) {
723  c->found_hdlr_mdta = 1;
724  }
725  return 0;
726  }
727 
728  st = c->fc->streams[c->fc->nb_streams-1];
729 
730  if (type == MKTAG('v','i','d','e'))
732  else if (type == MKTAG('s','o','u','n'))
734  else if (type == MKTAG('m','1','a',' '))
736  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
738 
739  avio_rb32(pb); /* component manufacture */
740  avio_rb32(pb); /* component flags */
741  avio_rb32(pb); /* component flags mask */
742 
743  title_size = atom.size - 24;
744  if (title_size > 0) {
745  if (title_size > FFMIN(INT_MAX, SIZE_MAX-1))
746  return AVERROR_INVALIDDATA;
747  title_str = av_malloc(title_size + 1); /* Add null terminator */
748  if (!title_str)
749  return AVERROR(ENOMEM);
750 
751  ret = ffio_read_size(pb, title_str, title_size);
752  if (ret < 0) {
753  av_freep(&title_str);
754  return ret;
755  }
756  title_str[title_size] = 0;
757  if (title_str[0]) {
758  int off = (!c->isom && title_str[0] == title_size - 1);
759  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
760  }
761  av_freep(&title_str);
762  }
763 
764  return 0;
765 }
766 
768 {
769  AVStream *st;
770  int tag;
771 
772  if (fc->nb_streams < 1)
773  return 0;
774  st = fc->streams[fc->nb_streams-1];
775 
776  avio_rb32(pb); /* version + flags */
777  ff_mp4_read_descr(fc, pb, &tag);
778  if (tag == MP4ESDescrTag) {
780  } else
781  avio_rb16(pb); /* ID */
782 
783  ff_mp4_read_descr(fc, pb, &tag);
784  if (tag == MP4DecConfigDescrTag)
785  ff_mp4_read_dec_config_descr(fc, st, pb);
786  return 0;
787 }
788 
790 {
791  return ff_mov_read_esds(c->fc, pb);
792 }
793 
795 {
796  AVStream *st;
797  enum AVAudioServiceType *ast;
798  int ac3info, acmod, lfeon, bsmod;
799 
800  if (c->fc->nb_streams < 1)
801  return 0;
802  st = c->fc->streams[c->fc->nb_streams-1];
803 
805  sizeof(*ast));
806  if (!ast)
807  return AVERROR(ENOMEM);
808 
809  ac3info = avio_rb24(pb);
810  bsmod = (ac3info >> 14) & 0x7;
811  acmod = (ac3info >> 11) & 0x7;
812  lfeon = (ac3info >> 10) & 0x1;
813  st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
815  if (lfeon)
817  *ast = bsmod;
818  if (st->codecpar->channels > 1 && bsmod == 0x7)
820 
821 #if FF_API_LAVF_AVCTX
823  st->codec->audio_service_type = *ast;
825 #endif
826 
827  return 0;
828 }
829 
831 {
832  AVStream *st;
833  enum AVAudioServiceType *ast;
834  int eac3info, acmod, lfeon, bsmod;
835 
836  if (c->fc->nb_streams < 1)
837  return 0;
838  st = c->fc->streams[c->fc->nb_streams-1];
839 
841  sizeof(*ast));
842  if (!ast)
843  return AVERROR(ENOMEM);
844 
845  /* No need to parse fields for additional independent substreams and its
846  * associated dependent substreams since libavcodec's E-AC-3 decoder
847  * does not support them yet. */
848  avio_rb16(pb); /* data_rate and num_ind_sub */
849  eac3info = avio_rb24(pb);
850  bsmod = (eac3info >> 12) & 0x1f;
851  acmod = (eac3info >> 9) & 0x7;
852  lfeon = (eac3info >> 8) & 0x1;
854  if (lfeon)
857  *ast = bsmod;
858  if (st->codecpar->channels > 1 && bsmod == 0x7)
860 
861 #if FF_API_LAVF_AVCTX
863  st->codec->audio_service_type = *ast;
865 #endif
866 
867  return 0;
868 }
869 
871 {
872  const uint32_t ddts_size = 20;
873  AVStream *st = NULL;
874  uint8_t *buf = NULL;
875  uint32_t frame_duration_code = 0;
876  uint32_t channel_layout_code = 0;
877  GetBitContext gb;
878 
879  buf = av_malloc(ddts_size + FF_INPUT_BUFFER_PADDING_SIZE);
880  if (!buf) {
881  return AVERROR(ENOMEM);
882  }
883  if (avio_read(pb, buf, ddts_size) < ddts_size) {
884  av_free(buf);
885  return AVERROR_INVALIDDATA;
886  }
887 
888  init_get_bits(&gb, buf, 8*ddts_size);
889 
890  if (c->fc->nb_streams < 1) {
891  return 0;
892  }
893  st = c->fc->streams[c->fc->nb_streams-1];
894 
895  st->codecpar->sample_rate = get_bits_long(&gb, 32);
896  if (st->codecpar->sample_rate <= 0) {
897  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
898  return AVERROR_INVALIDDATA;
899  }
900  skip_bits_long(&gb, 32); /* max bitrate */
901  st->codecpar->bit_rate = get_bits_long(&gb, 32);
902  st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
903  frame_duration_code = get_bits(&gb, 2);
904  skip_bits(&gb, 30); /* various fields */
905  channel_layout_code = get_bits(&gb, 16);
906 
907  st->codecpar->frame_size =
908  (frame_duration_code == 0) ? 512 :
909  (frame_duration_code == 1) ? 1024 :
910  (frame_duration_code == 2) ? 2048 :
911  (frame_duration_code == 3) ? 4096 : 0;
912 
913  if (channel_layout_code > 0xff) {
914  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
915  }
916  st->codecpar->channel_layout =
917  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
918  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
919  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
920  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
921  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
922  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
923 
925 
926  return 0;
927 }
928 
930 {
931  AVStream *st;
932 
933  if (c->fc->nb_streams < 1)
934  return 0;
935  st = c->fc->streams[c->fc->nb_streams-1];
936 
937  if (atom.size < 16)
938  return 0;
939 
940  /* skip version and flags */
941  avio_skip(pb, 4);
942 
943  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
944 
945  return 0;
946 }
947 
949 {
950  AVStream *st;
951  int ret;
952 
953  if (c->fc->nb_streams < 1)
954  return 0;
955  st = c->fc->streams[c->fc->nb_streams-1];
956 
957  if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
958  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
959 
960  return ret;
961 }
962 
964 {
965  const int num = avio_rb32(pb);
966  const int den = avio_rb32(pb);
967  AVStream *st;
968 
969  if (c->fc->nb_streams < 1)
970  return 0;
971  st = c->fc->streams[c->fc->nb_streams-1];
972 
973  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
974  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
976  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
978  num, den);
979  } else if (den != 0) {
981  num, den, 32767);
982  }
983  return 0;
984 }
985 
986 /* this atom contains actual media data */
988 {
989  if (atom.size == 0) /* wrong one (MP4) */
990  return 0;
991  c->found_mdat=1;
992  return 0; /* now go for moov */
993 }
994 
995 #define DRM_BLOB_SIZE 56
996 
998 {
999  uint8_t intermediate_key[20];
1000  uint8_t intermediate_iv[20];
1001  uint8_t input[64];
1002  uint8_t output[64];
1003  uint8_t file_checksum[20];
1004  uint8_t calculated_checksum[20];
1005  struct AVSHA *sha;
1006  int i;
1007  int ret = 0;
1008  uint8_t *activation_bytes = c->activation_bytes;
1009  uint8_t *fixed_key = c->audible_fixed_key;
1010 
1011  c->aax_mode = 1;
1012 
1013  sha = av_sha_alloc();
1014  if (!sha)
1015  return AVERROR(ENOMEM);
1016  c->aes_decrypt = av_aes_alloc();
1017  if (!c->aes_decrypt) {
1018  ret = AVERROR(ENOMEM);
1019  goto fail;
1020  }
1021 
1022  /* drm blob processing */
1023  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
1024  avio_read(pb, input, DRM_BLOB_SIZE);
1025  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
1026  avio_read(pb, file_checksum, 20);
1027 
1028  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
1029  for (i = 0; i < 20; i++)
1030  av_log(c->fc, AV_LOG_INFO, "%02x", file_checksum[i]);
1031  av_log(c->fc, AV_LOG_INFO, "\n");
1032 
1033  /* verify activation data */
1034  if (!activation_bytes) {
1035  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
1036  ret = 0; /* allow ffprobe to continue working on .aax files */
1037  goto fail;
1038  }
1039  if (c->activation_bytes_size != 4) {
1040  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
1041  ret = AVERROR(EINVAL);
1042  goto fail;
1043  }
1044 
1045  /* verify fixed key */
1046  if (c->audible_fixed_key_size != 16) {
1047  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
1048  ret = AVERROR(EINVAL);
1049  goto fail;
1050  }
1051 
1052  /* AAX (and AAX+) key derivation */
1053  av_sha_init(sha, 160);
1054  av_sha_update(sha, fixed_key, 16);
1055  av_sha_update(sha, activation_bytes, 4);
1056  av_sha_final(sha, intermediate_key);
1057  av_sha_init(sha, 160);
1058  av_sha_update(sha, fixed_key, 16);
1059  av_sha_update(sha, intermediate_key, 20);
1060  av_sha_update(sha, activation_bytes, 4);
1061  av_sha_final(sha, intermediate_iv);
1062  av_sha_init(sha, 160);
1063  av_sha_update(sha, intermediate_key, 16);
1064  av_sha_update(sha, intermediate_iv, 16);
1065  av_sha_final(sha, calculated_checksum);
1066  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1067  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1068  ret = AVERROR_INVALIDDATA;
1069  goto fail;
1070  }
1071  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1072  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1073  for (i = 0; i < 4; i++) {
1074  // file data (in output) is stored in big-endian mode
1075  if (activation_bytes[i] != output[3 - i]) { // critical error
1076  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1077  ret = AVERROR_INVALIDDATA;
1078  goto fail;
1079  }
1080  }
1081  memcpy(c->file_key, output + 8, 16);
1082  memcpy(input, output + 26, 16);
1083  av_sha_init(sha, 160);
1084  av_sha_update(sha, input, 16);
1085  av_sha_update(sha, c->file_key, 16);
1086  av_sha_update(sha, fixed_key, 16);
1087  av_sha_final(sha, c->file_iv);
1088 
1089 fail:
1090  av_free(sha);
1091 
1092  return ret;
1093 }
1094 
1095 // Audible AAX (and AAX+) bytestream decryption
1096 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1097 {
1098  int blocks = 0;
1099  unsigned char iv[16];
1100 
1101  memcpy(iv, c->file_iv, 16); // iv is overwritten
1102  blocks = size >> 4; // trailing bytes are not encrypted!
1103  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1104  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1105 
1106  return 0;
1107 }
1108 
1109 /* read major brand, minor version and compatible brands and store them as metadata */
1111 {
1112  uint32_t minor_ver;
1113  int comp_brand_size;
1114  char* comp_brands_str;
1115  uint8_t type[5] = {0};
1116  int ret = ffio_read_size(pb, type, 4);
1117  if (ret < 0)
1118  return ret;
1119 
1120  if (strcmp(type, "qt "))
1121  c->isom = 1;
1122  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1123  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1124  minor_ver = avio_rb32(pb); /* minor version */
1125  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1126 
1127  comp_brand_size = atom.size - 8;
1128  if (comp_brand_size < 0)
1129  return AVERROR_INVALIDDATA;
1130  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1131  if (!comp_brands_str)
1132  return AVERROR(ENOMEM);
1133 
1134  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1135  if (ret < 0) {
1136  av_freep(&comp_brands_str);
1137  return ret;
1138  }
1139  comp_brands_str[comp_brand_size] = 0;
1140  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1141  av_freep(&comp_brands_str);
1142 
1143  return 0;
1144 }
1145 
1146 /* this atom should contain all header atoms */
1148 {
1149  int ret;
1150 
1151  if (c->found_moov) {
1152  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1153  avio_skip(pb, atom.size);
1154  return 0;
1155  }
1156 
1157  if ((ret = mov_read_default(c, pb, atom)) < 0)
1158  return ret;
1159  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1160  /* so we don't parse the whole file if over a network */
1161  c->found_moov=1;
1162  return 0; /* now go for mdat */
1163 }
1164 
1166 {
1167  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1168  c->has_looked_for_mfra = 1;
1169  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1170  int ret;
1171  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1172  "for a mfra\n");
1173  if ((ret = mov_read_mfra(c, pb)) < 0) {
1174  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1175  "read the mfra (may be a live ismv)\n");
1176  }
1177  } else {
1178  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1179  "seekable, can not look for mfra\n");
1180  }
1181  }
1183  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1184  return mov_read_default(c, pb, atom);
1185 }
1186 
1187 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1188 {
1189  if (time) {
1190  if(time >= 2082844800)
1191  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1192  avpriv_dict_set_timestamp(metadata, "creation_time", time * 1000000);
1193  }
1194 }
1195 
1197 {
1198  AVStream *st;
1199  MOVStreamContext *sc;
1200  int version;
1201  char language[4] = {0};
1202  unsigned lang;
1203  int64_t creation_time;
1204 
1205  if (c->fc->nb_streams < 1)
1206  return 0;
1207  st = c->fc->streams[c->fc->nb_streams-1];
1208  sc = st->priv_data;
1209 
1210  if (sc->time_scale) {
1211  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1212  return AVERROR_INVALIDDATA;
1213  }
1214 
1215  version = avio_r8(pb);
1216  if (version > 1) {
1217  avpriv_request_sample(c->fc, "Version %d", version);
1218  return AVERROR_PATCHWELCOME;
1219  }
1220  avio_rb24(pb); /* flags */
1221  if (version == 1) {
1222  creation_time = avio_rb64(pb);
1223  avio_rb64(pb);
1224  } else {
1225  creation_time = avio_rb32(pb);
1226  avio_rb32(pb); /* modification time */
1227  }
1228  mov_metadata_creation_time(&st->metadata, creation_time);
1229 
1230  sc->time_scale = avio_rb32(pb);
1231  if (sc->time_scale <= 0) {
1232  av_log(c->fc, AV_LOG_ERROR, "Invalid mdhd time scale %d\n", sc->time_scale);
1233  return AVERROR_INVALIDDATA;
1234  }
1235  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1236 
1237  lang = avio_rb16(pb); /* language */
1238  if (ff_mov_lang_to_iso639(lang, language))
1239  av_dict_set(&st->metadata, "language", language, 0);
1240  avio_rb16(pb); /* quality */
1241 
1242  return 0;
1243 }
1244 
1246 {
1247  int i;
1248  int64_t creation_time;
1249  int version = avio_r8(pb); /* version */
1250  avio_rb24(pb); /* flags */
1251 
1252  if (version == 1) {
1253  creation_time = avio_rb64(pb);
1254  avio_rb64(pb);
1255  } else {
1256  creation_time = avio_rb32(pb);
1257  avio_rb32(pb); /* modification time */
1258  }
1259  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1260  c->time_scale = avio_rb32(pb); /* time scale */
1261  if (c->time_scale <= 0) {
1262  av_log(c->fc, AV_LOG_ERROR, "Invalid mvhd time scale %d\n", c->time_scale);
1263  return AVERROR_INVALIDDATA;
1264  }
1265  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1266 
1267  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1268  // set the AVCodecContext duration because the duration of individual tracks
1269  // may be inaccurate
1270  if (c->time_scale > 0 && !c->trex_data)
1272  avio_rb32(pb); /* preferred scale */
1273 
1274  avio_rb16(pb); /* preferred volume */
1275 
1276  avio_skip(pb, 10); /* reserved */
1277 
1278  /* movie display matrix, store it in main context and use it later on */
1279  for (i = 0; i < 3; i++) {
1280  c->movie_display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
1281  c->movie_display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
1282  c->movie_display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
1283  }
1284 
1285  avio_rb32(pb); /* preview time */
1286  avio_rb32(pb); /* preview duration */
1287  avio_rb32(pb); /* poster time */
1288  avio_rb32(pb); /* selection time */
1289  avio_rb32(pb); /* selection duration */
1290  avio_rb32(pb); /* current time */
1291  avio_rb32(pb); /* next track ID */
1292 
1293  return 0;
1294 }
1295 
1297 {
1298  AVStream *st;
1299  int little_endian;
1300 
1301  if (c->fc->nb_streams < 1)
1302  return 0;
1303  st = c->fc->streams[c->fc->nb_streams-1];
1304 
1305  little_endian = avio_rb16(pb) & 0xFF;
1306  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1307  if (little_endian == 1) {
1308  switch (st->codecpar->codec_id) {
1309  case AV_CODEC_ID_PCM_S24BE:
1311  break;
1312  case AV_CODEC_ID_PCM_S32BE:
1314  break;
1315  case AV_CODEC_ID_PCM_F32BE:
1317  break;
1318  case AV_CODEC_ID_PCM_F64BE:
1320  break;
1321  default:
1322  break;
1323  }
1324  }
1325  return 0;
1326 }
1327 
1329 {
1330  AVStream *st;
1331  char color_parameter_type[5] = { 0 };
1332  uint16_t color_primaries, color_trc, color_matrix;
1333  int ret;
1334 
1335  if (c->fc->nb_streams < 1)
1336  return 0;
1337  st = c->fc->streams[c->fc->nb_streams - 1];
1338 
1339  ret = ffio_read_size(pb, color_parameter_type, 4);
1340  if (ret < 0)
1341  return ret;
1342  if (strncmp(color_parameter_type, "nclx", 4) &&
1343  strncmp(color_parameter_type, "nclc", 4)) {
1344  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1345  color_parameter_type);
1346  return 0;
1347  }
1348 
1349  color_primaries = avio_rb16(pb);
1350  color_trc = avio_rb16(pb);
1351  color_matrix = avio_rb16(pb);
1352 
1353  av_log(c->fc, AV_LOG_TRACE,
1354  "%s: pri %d trc %d matrix %d",
1355  color_parameter_type, color_primaries, color_trc, color_matrix);
1356 
1357  if (!strncmp(color_parameter_type, "nclx", 4)) {
1358  uint8_t color_range = avio_r8(pb) >> 7;
1359  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1360  if (color_range)
1362  else
1364  }
1365  if (color_primaries >= AVCOL_PRI_NB)
1366  color_primaries = AVCOL_PRI_UNSPECIFIED;
1367  if (color_trc >= AVCOL_TRC_NB)
1368  color_trc = AVCOL_TRC_UNSPECIFIED;
1369  if (color_matrix >= AVCOL_SPC_NB)
1370  color_matrix = AVCOL_SPC_UNSPECIFIED;
1372  st->codecpar->color_trc = color_trc;
1373  st->codecpar->color_space = color_matrix;
1374  av_log(c->fc, AV_LOG_TRACE, "\n");
1375 
1376  return 0;
1377 }
1378 
1380 {
1381  AVStream *st;
1382  unsigned mov_field_order;
1383  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1384 
1385  if (c->fc->nb_streams < 1) // will happen with jp2 files
1386  return 0;
1387  st = c->fc->streams[c->fc->nb_streams-1];
1388  if (atom.size < 2)
1389  return AVERROR_INVALIDDATA;
1390  mov_field_order = avio_rb16(pb);
1391  if ((mov_field_order & 0xFF00) == 0x0100)
1392  decoded_field_order = AV_FIELD_PROGRESSIVE;
1393  else if ((mov_field_order & 0xFF00) == 0x0200) {
1394  switch (mov_field_order & 0xFF) {
1395  case 0x01: decoded_field_order = AV_FIELD_TT;
1396  break;
1397  case 0x06: decoded_field_order = AV_FIELD_BB;
1398  break;
1399  case 0x09: decoded_field_order = AV_FIELD_TB;
1400  break;
1401  case 0x0E: decoded_field_order = AV_FIELD_BT;
1402  break;
1403  }
1404  }
1405  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1406  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1407  }
1408  st->codecpar->field_order = decoded_field_order;
1409 
1410  return 0;
1411 }
1412 
1414 {
1415  int err = 0;
1416  uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1417  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1418  return AVERROR_INVALIDDATA;
1419  if ((err = av_reallocp(&par->extradata, size)) < 0) {
1420  par->extradata_size = 0;
1421  return err;
1422  }
1424  return 0;
1425 }
1426 
1427 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1429  AVCodecParameters *par, uint8_t *buf)
1430 {
1431  int64_t result = atom.size;
1432  int err;
1433 
1434  AV_WB32(buf , atom.size + 8);
1435  AV_WL32(buf + 4, atom.type);
1436  err = ffio_read_size(pb, buf + 8, atom.size);
1437  if (err < 0) {
1438  par->extradata_size -= atom.size;
1439  return err;
1440  } else if (err < atom.size) {
1441  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1442  par->extradata_size -= atom.size - err;
1443  result = err;
1444  }
1445  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1446  return result;
1447 }
1448 
1449 /* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1451  enum AVCodecID codec_id)
1452 {
1453  AVStream *st;
1454  uint64_t original_size;
1455  int err;
1456 
1457  if (c->fc->nb_streams < 1) // will happen with jp2 files
1458  return 0;
1459  st = c->fc->streams[c->fc->nb_streams-1];
1460 
1461  if (st->codecpar->codec_id != codec_id)
1462  return 0; /* unexpected codec_id - don't mess with extradata */
1463 
1464  original_size = st->codecpar->extradata_size;
1465  err = mov_realloc_extradata(st->codecpar, atom);
1466  if (err)
1467  return err;
1468 
1469  err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1470  if (err < 0)
1471  return err;
1472  return 0; // Note: this is the original behavior to ignore truncation.
1473 }
1474 
1475 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1477 {
1478  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1479 }
1480 
1482 {
1483  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1484 }
1485 
1487 {
1488  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1489 }
1490 
1492 {
1493  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1494 }
1495 
1497 {
1498  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1499  if(ret == 0)
1500  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1501  return ret;
1502 }
1503 
1505 {
1506  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1507 
1508  if (!ret && c->fc->nb_streams >= 1) {
1509  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1510  if (par->extradata_size >= 40) {
1511  par->height = AV_RB16(&par->extradata[36]);
1512  par->width = AV_RB16(&par->extradata[38]);
1513  }
1514  }
1515  return ret;
1516 }
1517 
1519 {
1520  if (c->fc->nb_streams >= 1) {
1521  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1522  if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1523  par->codec_id == AV_CODEC_ID_H264 &&
1524  atom.size > 11) {
1525  int cid;
1526  avio_skip(pb, 10);
1527  cid = avio_rb16(pb);
1528  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1529  if (cid == 0xd4d || cid == 0xd4e)
1530  par->width = 1440;
1531  return 0;
1532  } else if ((par->codec_tag == MKTAG('A', 'V', 'd', '1') ||
1533  par->codec_tag == MKTAG('A', 'V', 'd', 'n')) &&
1534  atom.size >= 24) {
1535  int num, den;
1536  avio_skip(pb, 12);
1537  num = avio_rb32(pb);
1538  den = avio_rb32(pb);
1539  if (num <= 0 || den <= 0)
1540  return 0;
1541  switch (avio_rb32(pb)) {
1542  case 2:
1543  if (den >= INT_MAX / 2)
1544  return 0;
1545  den *= 2;
1546  case 1:
1547  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1548  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1549  default:
1550  return 0;
1551  }
1552  }
1553  }
1554 
1555  return mov_read_avid(c, pb, atom);
1556 }
1557 
1559 {
1560  int ret = 0;
1561  int length = 0;
1562  uint64_t original_size;
1563  if (c->fc->nb_streams >= 1) {
1564  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1565  if (par->codec_id == AV_CODEC_ID_H264)
1566  return 0;
1567  if (atom.size == 16) {
1568  original_size = par->extradata_size;
1569  ret = mov_realloc_extradata(par, atom);
1570  if (!ret) {
1571  length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1572  if (length == atom.size) {
1573  const uint8_t range_value = par->extradata[original_size + 19];
1574  switch (range_value) {
1575  case 1:
1577  break;
1578  case 2:
1580  break;
1581  default:
1582  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1583  break;
1584  }
1585  ff_dlog(c, "color_range: %d\n", par->color_range);
1586  } else {
1587  /* For some reason the whole atom was not added to the extradata */
1588  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1589  }
1590  } else {
1591  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1592  }
1593  } else {
1594  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1595  }
1596  }
1597 
1598  return ret;
1599 }
1600 
1602 {
1603  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1604 }
1605 
1607 {
1608  AVStream *st;
1609  int ret;
1610 
1611  if (c->fc->nb_streams < 1)
1612  return 0;
1613  st = c->fc->streams[c->fc->nb_streams-1];
1614 
1615  if ((uint64_t)atom.size > (1<<30))
1616  return AVERROR_INVALIDDATA;
1617 
1618  if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1621  // pass all frma atom to codec, needed at least for QDMC and QDM2
1622  av_freep(&st->codecpar->extradata);
1623  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1624  if (ret < 0)
1625  return ret;
1626  } else if (atom.size > 8) { /* to read frma, esds atoms */
1627  if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1628  uint64_t buffer;
1629  ret = ffio_ensure_seekback(pb, 8);
1630  if (ret < 0)
1631  return ret;
1632  buffer = avio_rb64(pb);
1633  atom.size -= 8;
1634  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1635  && buffer >> 32 <= atom.size
1636  && buffer >> 32 >= 8) {
1637  avio_skip(pb, -8);
1638  atom.size += 8;
1639  } else if (!st->codecpar->extradata_size) {
1640 #define ALAC_EXTRADATA_SIZE 36
1642  if (!st->codecpar->extradata)
1643  return AVERROR(ENOMEM);
1646  AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1647  AV_WB64(st->codecpar->extradata + 12, buffer);
1648  avio_read(pb, st->codecpar->extradata + 20, 16);
1649  avio_skip(pb, atom.size - 24);
1650  return 0;
1651  }
1652  }
1653  if ((ret = mov_read_default(c, pb, atom)) < 0)
1654  return ret;
1655  } else
1656  avio_skip(pb, atom.size);
1657  return 0;
1658 }
1659 
1660 /**
1661  * This function reads atom content and puts data in extradata without tag
1662  * nor size unlike mov_read_extradata.
1663  */
1665 {
1666  AVStream *st;
1667  int ret;
1668 
1669  if (c->fc->nb_streams < 1)
1670  return 0;
1671  st = c->fc->streams[c->fc->nb_streams-1];
1672 
1673  if ((uint64_t)atom.size > (1<<30))
1674  return AVERROR_INVALIDDATA;
1675 
1676  if (atom.size >= 10) {
1677  // Broken files created by legacy versions of libavformat will
1678  // wrap a whole fiel atom inside of a glbl atom.
1679  unsigned size = avio_rb32(pb);
1680  unsigned type = avio_rl32(pb);
1681  avio_seek(pb, -8, SEEK_CUR);
1682  if (type == MKTAG('f','i','e','l') && size == atom.size)
1683  return mov_read_default(c, pb, atom);
1684  }
1685  if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1686  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1687  return 0;
1688  }
1689  av_freep(&st->codecpar->extradata);
1690  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1691  if (ret < 0)
1692  return ret;
1693 
1694  return 0;
1695 }
1696 
1698 {
1699  AVStream *st;
1700  uint8_t profile_level;
1701  int ret;
1702 
1703  if (c->fc->nb_streams < 1)
1704  return 0;
1705  st = c->fc->streams[c->fc->nb_streams-1];
1706 
1707  if (atom.size >= (1<<28) || atom.size < 7)
1708  return AVERROR_INVALIDDATA;
1709 
1710  profile_level = avio_r8(pb);
1711  if ((profile_level & 0xf0) != 0xc0)
1712  return 0;
1713 
1714  avio_seek(pb, 6, SEEK_CUR);
1715  av_freep(&st->codecpar->extradata);
1716  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1717  if (ret < 0)
1718  return ret;
1719 
1720  return 0;
1721 }
1722 
1723 /**
1724  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1725  * but can have extradata appended at the end after the 40 bytes belonging
1726  * to the struct.
1727  */
1729 {
1730  AVStream *st;
1731  int ret;
1732 
1733  if (c->fc->nb_streams < 1)
1734  return 0;
1735  if (atom.size <= 40)
1736  return 0;
1737  st = c->fc->streams[c->fc->nb_streams-1];
1738 
1739  if ((uint64_t)atom.size > (1<<30))
1740  return AVERROR_INVALIDDATA;
1741 
1742  avio_skip(pb, 40);
1743  av_freep(&st->codecpar->extradata);
1744  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1745  if (ret < 0)
1746  return ret;
1747 
1748  return 0;
1749 }
1750 
1752 {
1753  AVStream *st;
1754  MOVStreamContext *sc;
1755  unsigned int i, entries;
1756 
1757  if (c->fc->nb_streams < 1)
1758  return 0;
1759  st = c->fc->streams[c->fc->nb_streams-1];
1760  sc = st->priv_data;
1761 
1762  avio_r8(pb); /* version */
1763  avio_rb24(pb); /* flags */
1764 
1765  entries = avio_rb32(pb);
1766 
1767  if (!entries)
1768  return 0;
1769 
1770  if (sc->chunk_offsets)
1771  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1772  av_free(sc->chunk_offsets);
1773  sc->chunk_count = 0;
1774  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1775  if (!sc->chunk_offsets)
1776  return AVERROR(ENOMEM);
1777  sc->chunk_count = entries;
1778 
1779  if (atom.type == MKTAG('s','t','c','o'))
1780  for (i = 0; i < entries && !pb->eof_reached; i++)
1781  sc->chunk_offsets[i] = avio_rb32(pb);
1782  else if (atom.type == MKTAG('c','o','6','4'))
1783  for (i = 0; i < entries && !pb->eof_reached; i++)
1784  sc->chunk_offsets[i] = avio_rb64(pb);
1785  else
1786  return AVERROR_INVALIDDATA;
1787 
1788  sc->chunk_count = i;
1789 
1790  if (pb->eof_reached)
1791  return AVERROR_EOF;
1792 
1793  return 0;
1794 }
1795 
1796 /**
1797  * Compute codec id for 'lpcm' tag.
1798  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1799  */
1801 {
1802  /* lpcm flags:
1803  * 0x1 = float
1804  * 0x2 = big-endian
1805  * 0x4 = signed
1806  */
1807  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1808 }
1809 
1810 static int mov_codec_id(AVStream *st, uint32_t format)
1811 {
1812  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1813 
1814  if (id <= 0 &&
1815  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1816  (format & 0xFFFF) == 'T' + ('S' << 8)))
1817  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1818 
1819  if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1821  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1822  /* skip old ASF MPEG-4 tag */
1823  format && format != MKTAG('m','p','4','s')) {
1825  if (id <= 0)
1826  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1827  if (id > 0)
1829  else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
1831  st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
1833  if (id > 0)
1835  }
1836  }
1837 
1838  st->codecpar->codec_tag = format;
1839 
1840  return id;
1841 }
1842 
1844  AVStream *st, MOVStreamContext *sc)
1845 {
1846  uint8_t codec_name[32] = { 0 };
1847  int64_t stsd_start;
1848  unsigned int len;
1849 
1850  /* The first 16 bytes of the video sample description are already
1851  * read in ff_mov_read_stsd_entries() */
1852  stsd_start = avio_tell(pb) - 16;
1853 
1854  avio_rb16(pb); /* version */
1855  avio_rb16(pb); /* revision level */
1856  avio_rb32(pb); /* vendor */
1857  avio_rb32(pb); /* temporal quality */
1858  avio_rb32(pb); /* spatial quality */
1859 
1860  st->codecpar->width = avio_rb16(pb); /* width */
1861  st->codecpar->height = avio_rb16(pb); /* height */
1862 
1863  avio_rb32(pb); /* horiz resolution */
1864  avio_rb32(pb); /* vert resolution */
1865  avio_rb32(pb); /* data size, always 0 */
1866  avio_rb16(pb); /* frames per samples */
1867 
1868  len = avio_r8(pb); /* codec name, pascal string */
1869  if (len > 31)
1870  len = 31;
1871  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1872  if (len < 31)
1873  avio_skip(pb, 31 - len);
1874 
1875  if (codec_name[0])
1876  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1877 
1878  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1879  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1880  st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1881  st->codecpar->width &= ~1;
1882  st->codecpar->height &= ~1;
1883  }
1884  /* Flash Media Server uses tag H.263 with Sorenson Spark */
1885  if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1886  !memcmp(codec_name, "Sorenson H263", 13))
1888 
1889  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1890 
1891  avio_seek(pb, stsd_start, SEEK_SET);
1892 
1893  if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
1894  st->codecpar->bits_per_coded_sample &= 0x1F;
1895  sc->has_palette = 1;
1896  }
1897 }
1898 
1900  AVStream *st, MOVStreamContext *sc)
1901 {
1902  int bits_per_sample, flags;
1903  uint16_t version = avio_rb16(pb);
1904  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1905 
1906  avio_rb16(pb); /* revision level */
1907  avio_rb32(pb); /* vendor */
1908 
1909  st->codecpar->channels = avio_rb16(pb); /* channel count */
1910  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1911  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1912 
1913  sc->audio_cid = avio_rb16(pb);
1914  avio_rb16(pb); /* packet size = 0 */
1915 
1916  st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1917 
1918  // Read QT version 1 fields. In version 0 these do not exist.
1919  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1920  if (!c->isom ||
1921  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1922 
1923  if (version == 1) {
1924  sc->samples_per_frame = avio_rb32(pb);
1925  avio_rb32(pb); /* bytes per packet */
1926  sc->bytes_per_frame = avio_rb32(pb);
1927  avio_rb32(pb); /* bytes per sample */
1928  } else if (version == 2) {
1929  avio_rb32(pb); /* sizeof struct only */
1931  st->codecpar->channels = avio_rb32(pb);
1932  avio_rb32(pb); /* always 0x7F000000 */
1934 
1935  flags = avio_rb32(pb); /* lpcm format specific flag */
1936  sc->bytes_per_frame = avio_rb32(pb);
1937  sc->samples_per_frame = avio_rb32(pb);
1938  if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1939  st->codecpar->codec_id =
1941  flags);
1942  }
1943  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1944  /* can't correctly handle variable sized packet as audio unit */
1945  switch (st->codecpar->codec_id) {
1946  case AV_CODEC_ID_MP2:
1947  case AV_CODEC_ID_MP3:
1949  break;
1950  }
1951  }
1952  }
1953 
1954  if (sc->format == 0) {
1955  if (st->codecpar->bits_per_coded_sample == 8)
1956  st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1957  else if (st->codecpar->bits_per_coded_sample == 16)
1958  st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1959  }
1960 
1961  switch (st->codecpar->codec_id) {
1962  case AV_CODEC_ID_PCM_S8:
1963  case AV_CODEC_ID_PCM_U8:
1964  if (st->codecpar->bits_per_coded_sample == 16)
1966  break;
1967  case AV_CODEC_ID_PCM_S16LE:
1968  case AV_CODEC_ID_PCM_S16BE:
1969  if (st->codecpar->bits_per_coded_sample == 8)
1971  else if (st->codecpar->bits_per_coded_sample == 24)
1972  st->codecpar->codec_id =
1975  else if (st->codecpar->bits_per_coded_sample == 32)
1976  st->codecpar->codec_id =
1979  break;
1980  /* set values for old format before stsd version 1 appeared */
1981  case AV_CODEC_ID_MACE3:
1982  sc->samples_per_frame = 6;
1983  sc->bytes_per_frame = 2 * st->codecpar->channels;
1984  break;
1985  case AV_CODEC_ID_MACE6:
1986  sc->samples_per_frame = 6;
1987  sc->bytes_per_frame = 1 * st->codecpar->channels;
1988  break;
1990  sc->samples_per_frame = 64;
1991  sc->bytes_per_frame = 34 * st->codecpar->channels;
1992  break;
1993  case AV_CODEC_ID_GSM:
1994  sc->samples_per_frame = 160;
1995  sc->bytes_per_frame = 33;
1996  break;
1997  default:
1998  break;
1999  }
2000 
2001  bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2002  if (bits_per_sample) {
2003  st->codecpar->bits_per_coded_sample = bits_per_sample;
2004  sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
2005  }
2006 }
2007 
2009  AVStream *st, MOVStreamContext *sc,
2010  int64_t size)
2011 {
2012  // ttxt stsd contains display flags, justification, background
2013  // color, fonts, and default styles, so fake an atom to read it
2014  MOVAtom fake_atom = { .size = size };
2015  // mp4s contains a regular esds atom
2016  if (st->codecpar->codec_tag != AV_RL32("mp4s"))
2017  mov_read_glbl(c, pb, fake_atom);
2018  st->codecpar->width = sc->width;
2019  st->codecpar->height = sc->height;
2020 }
2021 
2022 static uint32_t yuv_to_rgba(uint32_t ycbcr)
2023 {
2024  uint8_t r, g, b;
2025  int y, cb, cr;
2026 
2027  y = (ycbcr >> 16) & 0xFF;
2028  cr = (ycbcr >> 8) & 0xFF;
2029  cb = ycbcr & 0xFF;
2030 
2031  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
2032  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
2033  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
2034 
2035  return (r << 16) | (g << 8) | b;
2036 }
2037 
2039 {
2040  char buf[256] = {0};
2041  uint8_t *src = st->codecpar->extradata;
2042  int i;
2043 
2044  if (st->codecpar->extradata_size != 64)
2045  return 0;
2046 
2047  if (st->codecpar->width > 0 && st->codecpar->height > 0)
2048  snprintf(buf, sizeof(buf), "size: %dx%d\n",
2049  st->codecpar->width, st->codecpar->height);
2050  av_strlcat(buf, "palette: ", sizeof(buf));
2051 
2052  for (i = 0; i < 16; i++) {
2053  uint32_t yuv = AV_RB32(src + i * 4);
2054  uint32_t rgba = yuv_to_rgba(yuv);
2055 
2056  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2057  }
2058 
2059  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2060  return 0;
2061 
2062  av_freep(&st->codecpar->extradata);
2063  st->codecpar->extradata_size = 0;
2065  if (!st->codecpar->extradata)
2066  return AVERROR(ENOMEM);
2067  st->codecpar->extradata_size = strlen(buf);
2068  memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2069 
2070  return 0;
2071 }
2072 
2074  AVStream *st, MOVStreamContext *sc,
2075  int64_t size)
2076 {
2077  int ret;
2078 
2079  if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2080  if ((int)size != size)
2081  return AVERROR(ENOMEM);
2082 
2083  ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2084  if (ret < 0)
2085  return ret;
2086  if (size > 16) {
2087  MOVStreamContext *tmcd_ctx = st->priv_data;
2088  int val;
2089  val = AV_RB32(st->codecpar->extradata + 4);
2090  tmcd_ctx->tmcd_flags = val;
2091  st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2092  st->avg_frame_rate.den = 1;
2093 #if FF_API_LAVF_AVCTX
2095  st->codec->time_base = av_inv_q(st->avg_frame_rate);
2097 #endif
2098  /* adjust for per frame dur in counter mode */
2099  if (tmcd_ctx->tmcd_flags & 0x0008) {
2100  int timescale = AV_RB32(st->codecpar->extradata + 8);
2101  int framedur = AV_RB32(st->codecpar->extradata + 12);
2102  st->avg_frame_rate.num *= timescale;
2103  st->avg_frame_rate.den *= framedur;
2104 #if FF_API_LAVF_AVCTX
2106  st->codec->time_base.den *= timescale;
2107  st->codec->time_base.num *= framedur;
2109 #endif
2110  }
2111  if (size > 30) {
2112  uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2113  uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2114  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2115  uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2116  if (str_size > 0 && size >= (int)str_size + 26) {
2117  char *reel_name = av_malloc(str_size + 1);
2118  if (!reel_name)
2119  return AVERROR(ENOMEM);
2120  memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2121  reel_name[str_size] = 0; /* Add null terminator */
2122  /* don't add reel_name if emtpy string */
2123  if (*reel_name == 0) {
2124  av_free(reel_name);
2125  } else {
2126  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2127  }
2128  }
2129  }
2130  }
2131  }
2132  } else {
2133  /* other codec type, just skip (rtp, mp4s ...) */
2134  avio_skip(pb, size);
2135  }
2136  return 0;
2137 }
2138 
2140  AVStream *st, MOVStreamContext *sc)
2141 {
2142  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2143  !st->codecpar->sample_rate && sc->time_scale > 1)
2144  st->codecpar->sample_rate = sc->time_scale;
2145 
2146  /* special codec parameters handling */
2147  switch (st->codecpar->codec_id) {
2148 #if CONFIG_DV_DEMUXER
2149  case AV_CODEC_ID_DVAUDIO:
2151  if (!c->dv_fctx) {
2152  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2153  return AVERROR(ENOMEM);
2154  }
2156  if (!c->dv_demux) {
2157  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2158  return AVERROR(ENOMEM);
2159  }
2160  sc->dv_audio_container = 1;
2162  break;
2163 #endif
2164  /* no ifdef since parameters are always those */
2165  case AV_CODEC_ID_QCELP:
2166  st->codecpar->channels = 1;
2167  // force sample rate for qcelp when not stored in mov
2168  if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2169  st->codecpar->sample_rate = 8000;
2170  // FIXME: Why is the following needed for some files?
2171  sc->samples_per_frame = 160;
2172  if (!sc->bytes_per_frame)
2173  sc->bytes_per_frame = 35;
2174  break;
2175  case AV_CODEC_ID_AMR_NB:
2176  st->codecpar->channels = 1;
2177  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2178  st->codecpar->sample_rate = 8000;
2179  break;
2180  case AV_CODEC_ID_AMR_WB:
2181  st->codecpar->channels = 1;
2182  st->codecpar->sample_rate = 16000;
2183  break;
2184  case AV_CODEC_ID_MP2:
2185  case AV_CODEC_ID_MP3:
2186  /* force type after stsd for m1a hdlr */
2188  break;
2189  case AV_CODEC_ID_GSM:
2190  case AV_CODEC_ID_ADPCM_MS:
2192  case AV_CODEC_ID_ILBC:
2193  case AV_CODEC_ID_MACE3:
2194  case AV_CODEC_ID_MACE6:
2195  case AV_CODEC_ID_QDM2:
2197  break;
2198  case AV_CODEC_ID_ALAC:
2199  if (st->codecpar->extradata_size == 36) {
2200  st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2201  st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2202  }
2203  break;
2204  case AV_CODEC_ID_AC3:
2205  case AV_CODEC_ID_EAC3:
2207  case AV_CODEC_ID_VC1:
2208  case AV_CODEC_ID_VP9:
2210  break;
2211  default:
2212  break;
2213  }
2214  return 0;
2215 }
2216 
2218  int codec_tag, int format,
2219  int64_t size)
2220 {
2221  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2222 
2223  if (codec_tag &&
2224  (codec_tag != format &&
2225  // AVID 1:1 samples with differing data format and codec tag exist
2226  (codec_tag != AV_RL32("AV1x") || format != AV_RL32("AVup")) &&
2227  // prores is allowed to have differing data format and codec tag
2228  codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
2229  // so is dv (sigh)
2230  codec_tag != AV_RL32("dvpp") && codec_tag != AV_RL32("dvcp") &&
2231  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2232  : codec_tag != MKTAG('j','p','e','g')))) {
2233  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2234  * export it as a separate AVStream but this needs a few changes
2235  * in the MOV demuxer, patch welcome. */
2236 
2237  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2238  avio_skip(pb, size);
2239  return 1;
2240  }
2241 
2242  return 0;
2243 }
2244 
2246 {
2247  AVStream *st;
2248  MOVStreamContext *sc;
2249  int pseudo_stream_id;
2250 
2251  if (c->fc->nb_streams < 1)
2252  return 0;
2253  st = c->fc->streams[c->fc->nb_streams-1];
2254  sc = st->priv_data;
2255 
2256  for (pseudo_stream_id = 0;
2257  pseudo_stream_id < entries && !pb->eof_reached;
2258  pseudo_stream_id++) {
2259  //Parsing Sample description table
2260  enum AVCodecID id;
2261  int ret, dref_id = 1;
2262  MOVAtom a = { AV_RL32("stsd") };
2263  int64_t start_pos = avio_tell(pb);
2264  int64_t size = avio_rb32(pb); /* size */
2265  uint32_t format = avio_rl32(pb); /* data format */
2266 
2267  if (size >= 16) {
2268  avio_rb32(pb); /* reserved */
2269  avio_rb16(pb); /* reserved */
2270  dref_id = avio_rb16(pb);
2271  } else if (size <= 7) {
2272  av_log(c->fc, AV_LOG_ERROR,
2273  "invalid size %"PRId64" in stsd\n", size);
2274  return AVERROR_INVALIDDATA;
2275  }
2276 
2277  if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2278  size - (avio_tell(pb) - start_pos)))
2279  continue;
2280 
2281  sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2282  sc->dref_id= dref_id;
2283  sc->format = format;
2284 
2285  id = mov_codec_id(st, format);
2286 
2287  av_log(c->fc, AV_LOG_TRACE,
2288  "size=%"PRId64" 4CC= %c%c%c%c/0x%08x codec_type=%d\n", size,
2289  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
2290  (format >> 24) & 0xff, format, st->codecpar->codec_type);
2291 
2293  st->codecpar->codec_id = id;
2294  mov_parse_stsd_video(c, pb, st, sc);
2295  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2296  st->codecpar->codec_id = id;
2297  mov_parse_stsd_audio(c, pb, st, sc);
2298  if (st->codecpar->sample_rate < 0) {
2299  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
2300  return AVERROR_INVALIDDATA;
2301  }
2302  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2303  st->codecpar->codec_id = id;
2304  mov_parse_stsd_subtitle(c, pb, st, sc,
2305  size - (avio_tell(pb) - start_pos));
2306  } else {
2307  ret = mov_parse_stsd_data(c, pb, st, sc,
2308  size - (avio_tell(pb) - start_pos));
2309  if (ret < 0)
2310  return ret;
2311  }
2312  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2313  a.size = size - (avio_tell(pb) - start_pos);
2314  if (a.size > 8) {
2315  if ((ret = mov_read_default(c, pb, a)) < 0)
2316  return ret;
2317  } else if (a.size > 0)
2318  avio_skip(pb, a.size);
2319 
2320  if (sc->extradata) {
2321  int extra_size = st->codecpar->extradata_size;
2322 
2323  /* Move the current stream extradata to the stream context one. */
2324  sc->extradata_size[pseudo_stream_id] = extra_size;
2325  sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
2326  if (!sc->extradata[pseudo_stream_id])
2327  return AVERROR(ENOMEM);
2328  memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
2329  av_freep(&st->codecpar->extradata);
2330  st->codecpar->extradata_size = 0;
2331  }
2332  }
2333 
2334  if (pb->eof_reached)
2335  return AVERROR_EOF;
2336 
2337  return 0;
2338 }
2339 
2341 {
2342  AVStream *st;
2343  MOVStreamContext *sc;
2344  int ret, entries;
2345 
2346  if (c->fc->nb_streams < 1)
2347  return 0;
2348  st = c->fc->streams[c->fc->nb_streams - 1];
2349  sc = st->priv_data;
2350 
2351  avio_r8(pb); /* version */
2352  avio_rb24(pb); /* flags */
2353  entries = avio_rb32(pb);
2354 
2355  if (entries <= 0) {
2356  av_log(c->fc, AV_LOG_ERROR, "invalid STSD entries %d\n", entries);
2357  return AVERROR_INVALIDDATA;
2358  }
2359 
2360  if (sc->extradata) {
2361  av_log(c->fc, AV_LOG_ERROR, "Duplicate STSD\n");
2362  return AVERROR_INVALIDDATA;
2363  }
2364  /* Prepare space for hosting multiple extradata. */
2365  sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
2366  sc->extradata_size = av_mallocz_array(entries, sizeof(*sc->extradata_size));
2367  if (!sc->extradata_size || !sc->extradata) {
2368  ret = AVERROR(ENOMEM);
2369  goto fail;
2370  }
2371 
2372  ret = ff_mov_read_stsd_entries(c, pb, entries);
2373  if (ret < 0)
2374  return ret;
2375 
2376  sc->stsd_count = entries;
2377 
2378  /* Restore back the primary extradata. */
2379  av_freep(&st->codecpar->extradata);
2380  st->codecpar->extradata_size = sc->extradata_size[0];
2381  if (sc->extradata_size[0]) {
2383  if (!st->codecpar->extradata)
2384  return AVERROR(ENOMEM);
2385  memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
2386  }
2387 
2388  return mov_finalize_stsd_codec(c, pb, st, sc);
2389 fail:
2390  av_freep(&sc->extradata);
2391  av_freep(&sc->extradata_size);
2392  return ret;
2393 }
2394 
2396 {
2397  AVStream *st;
2398  MOVStreamContext *sc;
2399  unsigned int i, entries;
2400 
2401  if (c->fc->nb_streams < 1)
2402  return 0;
2403  st = c->fc->streams[c->fc->nb_streams-1];
2404  sc = st->priv_data;
2405 
2406  avio_r8(pb); /* version */
2407  avio_rb24(pb); /* flags */
2408 
2409  entries = avio_rb32(pb);
2410 
2411  av_log(c->fc, AV_LOG_TRACE, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
2412 
2413  if (!entries)
2414  return 0;
2415  if (sc->stsc_data)
2416  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2417  av_free(sc->stsc_data);
2418  sc->stsc_count = 0;
2419  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2420  if (!sc->stsc_data)
2421  return AVERROR(ENOMEM);
2422 
2423  for (i = 0; i < entries && !pb->eof_reached; i++) {
2424  sc->stsc_data[i].first = avio_rb32(pb);
2425  sc->stsc_data[i].count = avio_rb32(pb);
2426  sc->stsc_data[i].id = avio_rb32(pb);
2427  }
2428 
2429  sc->stsc_count = i;
2430 
2431  if (pb->eof_reached)
2432  return AVERROR_EOF;
2433 
2434  return 0;
2435 }
2436 
2437 #define mov_stsc_index_valid(index, count) ((index) < (count) - 1)
2438 
2439 /* Compute the samples value for the stsc entry at the given index. */
2440 static inline int mov_get_stsc_samples(MOVStreamContext *sc, int index)
2441 {
2442  int chunk_count;
2443 
2444  if (mov_stsc_index_valid(index, sc->stsc_count))
2445  chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2446  else
2447  chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2448 
2449  return sc->stsc_data[index].count * chunk_count;
2450 }
2451 
2453 {
2454  AVStream *st;
2455  MOVStreamContext *sc;
2456  unsigned i, entries;
2457 
2458  if (c->fc->nb_streams < 1)
2459  return 0;
2460  st = c->fc->streams[c->fc->nb_streams-1];
2461  sc = st->priv_data;
2462 
2463  avio_rb32(pb); // version + flags
2464 
2465  entries = avio_rb32(pb);
2466  if (sc->stps_data)
2467  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2468  av_free(sc->stps_data);
2469  sc->stps_count = 0;
2470  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2471  if (!sc->stps_data)
2472  return AVERROR(ENOMEM);
2473 
2474  for (i = 0; i < entries && !pb->eof_reached; i++) {
2475  sc->stps_data[i] = avio_rb32(pb);
2476  //av_log(c->fc, AV_LOG_TRACE, "stps %d\n", sc->stps_data[i]);
2477  }
2478 
2479  sc->stps_count = i;
2480 
2481  if (pb->eof_reached)
2482  return AVERROR_EOF;
2483 
2484  return 0;
2485 }
2486 
2488 {
2489  AVStream *st;
2490  MOVStreamContext *sc;
2491  unsigned int i, entries;
2492 
2493  if (c->fc->nb_streams < 1)
2494  return 0;
2495  st = c->fc->streams[c->fc->nb_streams-1];
2496  sc = st->priv_data;
2497 
2498  avio_r8(pb); /* version */
2499  avio_rb24(pb); /* flags */
2500 
2501  entries = avio_rb32(pb);
2502 
2503  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %d\n", entries);
2504 
2505  if (!entries)
2506  {
2507  sc->keyframe_absent = 1;
2508  if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2510  return 0;
2511  }
2512  if (sc->keyframes)
2513  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2514  if (entries >= UINT_MAX / sizeof(int))
2515  return AVERROR_INVALIDDATA;
2516  av_freep(&sc->keyframes);
2517  sc->keyframe_count = 0;
2518  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2519  if (!sc->keyframes)
2520  return AVERROR(ENOMEM);
2521 
2522  for (i = 0; i < entries && !pb->eof_reached; i++) {
2523  sc->keyframes[i] = avio_rb32(pb);
2524  //av_log(c->fc, AV_LOG_TRACE, "keyframes[]=%d\n", sc->keyframes[i]);
2525  }
2526 
2527  sc->keyframe_count = i;
2528 
2529  if (pb->eof_reached)
2530  return AVERROR_EOF;
2531 
2532  return 0;
2533 }
2534 
2536 {
2537  AVStream *st;
2538  MOVStreamContext *sc;
2539  unsigned int i, entries, sample_size, field_size, num_bytes;
2540  GetBitContext gb;
2541  unsigned char* buf;
2542  int ret;
2543 
2544  if (c->fc->nb_streams < 1)
2545  return 0;
2546  st = c->fc->streams[c->fc->nb_streams-1];
2547  sc = st->priv_data;
2548 
2549  avio_r8(pb); /* version */
2550  avio_rb24(pb); /* flags */
2551 
2552  if (atom.type == MKTAG('s','t','s','z')) {
2553  sample_size = avio_rb32(pb);
2554  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2555  sc->sample_size = sample_size;
2556  sc->stsz_sample_size = sample_size;
2557  field_size = 32;
2558  } else {
2559  sample_size = 0;
2560  avio_rb24(pb); /* reserved */
2561  field_size = avio_r8(pb);
2562  }
2563  entries = avio_rb32(pb);
2564 
2565  av_log(c->fc, AV_LOG_TRACE, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2566 
2567  sc->sample_count = entries;
2568  if (sample_size)
2569  return 0;
2570 
2571  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2572  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2573  return AVERROR_INVALIDDATA;
2574  }
2575 
2576  if (!entries)
2577  return 0;
2578  if (entries >= (UINT_MAX - 4) / field_size)
2579  return AVERROR_INVALIDDATA;
2580  if (sc->sample_sizes)
2581  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2582  av_free(sc->sample_sizes);
2583  sc->sample_count = 0;
2584  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2585  if (!sc->sample_sizes)
2586  return AVERROR(ENOMEM);
2587 
2588  num_bytes = (entries*field_size+4)>>3;
2589 
2590  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2591  if (!buf) {
2592  av_freep(&sc->sample_sizes);
2593  return AVERROR(ENOMEM);
2594  }
2595 
2596  ret = ffio_read_size(pb, buf, num_bytes);
2597  if (ret < 0) {
2598  av_freep(&sc->sample_sizes);
2599  av_free(buf);
2600  return ret;
2601  }
2602 
2603  init_get_bits(&gb, buf, 8*num_bytes);
2604 
2605  for (i = 0; i < entries && !pb->eof_reached; i++) {
2606  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2607  sc->data_size += sc->sample_sizes[i];
2608  }
2609 
2610  sc->sample_count = i;
2611 
2612  av_free(buf);
2613 
2614  if (pb->eof_reached)
2615  return AVERROR_EOF;
2616 
2617  return 0;
2618 }
2619 
2621 {
2622  AVStream *st;
2623  MOVStreamContext *sc;
2624  unsigned int i, entries;
2625  int64_t duration=0;
2626  int64_t total_sample_count=0;
2627 
2628  if (c->fc->nb_streams < 1)
2629  return 0;
2630  st = c->fc->streams[c->fc->nb_streams-1];
2631  sc = st->priv_data;
2632 
2633  avio_r8(pb); /* version */
2634  avio_rb24(pb); /* flags */
2635  entries = avio_rb32(pb);
2636 
2637  av_log(c->fc, AV_LOG_TRACE, "track[%i].stts.entries = %i\n",
2638  c->fc->nb_streams-1, entries);
2639 
2640  if (sc->stts_data)
2641  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2642  av_free(sc->stts_data);
2643  sc->stts_count = 0;
2644  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2645  if (!sc->stts_data)
2646  return AVERROR(ENOMEM);
2647 
2648  for (i = 0; i < entries && !pb->eof_reached; i++) {
2649  int sample_duration;
2650  int sample_count;
2651 
2652  sample_count=avio_rb32(pb);
2653  sample_duration = avio_rb32(pb);
2654 
2655  if (sample_count < 0) {
2656  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2657  return AVERROR_INVALIDDATA;
2658  }
2659  sc->stts_data[i].count= sample_count;
2660  sc->stts_data[i].duration= sample_duration;
2661 
2662  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2663  sample_count, sample_duration);
2664 
2665  if ( i+1 == entries
2666  && i
2667  && sample_count == 1
2668  && total_sample_count > 100
2669  && sample_duration/10 > duration / total_sample_count)
2670  sample_duration = duration / total_sample_count;
2671  duration+=(int64_t)sample_duration*sample_count;
2672  total_sample_count+=sample_count;
2673  }
2674 
2675  sc->stts_count = i;
2676 
2677  sc->duration_for_fps += duration;
2678  sc->nb_frames_for_fps += total_sample_count;
2679 
2680  if (pb->eof_reached)
2681  return AVERROR_EOF;
2682 
2683  st->nb_frames= total_sample_count;
2684  if (duration)
2685  st->duration= duration;
2686  sc->track_end = duration;
2687  return 0;
2688 }
2689 
2691 {
2692  if (duration < 0) {
2693  if (duration == INT_MIN) {
2694  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2695  duration++;
2696  }
2697  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2698  }
2699 }
2700 
2702 {
2703  AVStream *st;
2704  MOVStreamContext *sc;
2705  unsigned int i, entries, ctts_count = 0;
2706 
2707  if (c->fc->nb_streams < 1)
2708  return 0;
2709  st = c->fc->streams[c->fc->nb_streams-1];
2710  sc = st->priv_data;
2711 
2712  avio_r8(pb); /* version */
2713  avio_rb24(pb); /* flags */
2714  entries = avio_rb32(pb);
2715 
2716  av_log(c->fc, AV_LOG_TRACE, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2717 
2718  if (!entries)
2719  return 0;
2720  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2721  return AVERROR_INVALIDDATA;
2722  av_freep(&sc->ctts_data);
2723  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2724  if (!sc->ctts_data)
2725  return AVERROR(ENOMEM);
2726 
2727  for (i = 0; i < entries && !pb->eof_reached; i++) {
2728  int count =avio_rb32(pb);
2729  int duration =avio_rb32(pb);
2730 
2731  if (count <= 0) {
2732  av_log(c->fc, AV_LOG_TRACE,
2733  "ignoring CTTS entry with count=%d duration=%d\n",
2734  count, duration);
2735  continue;
2736  }
2737 
2738  sc->ctts_data[ctts_count].count = count;
2739  sc->ctts_data[ctts_count].duration = duration;
2740  ctts_count++;
2741 
2742  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2743  count, duration);
2744 
2745  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2746  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2747  av_freep(&sc->ctts_data);
2748  sc->ctts_count = 0;
2749  return 0;
2750  }
2751 
2752  if (i+2<entries)
2753  mov_update_dts_shift(sc, duration);
2754  }
2755 
2756  sc->ctts_count = ctts_count;
2757 
2758  if (pb->eof_reached)
2759  return AVERROR_EOF;
2760 
2761  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2762 
2763  return 0;
2764 }
2765 
2767 {
2768  AVStream *st;
2769  MOVStreamContext *sc;
2770  unsigned int i, entries;
2771  uint8_t version;
2772  uint32_t grouping_type;
2773 
2774  if (c->fc->nb_streams < 1)
2775  return 0;
2776  st = c->fc->streams[c->fc->nb_streams-1];
2777  sc = st->priv_data;
2778 
2779  version = avio_r8(pb); /* version */
2780  avio_rb24(pb); /* flags */
2781  grouping_type = avio_rl32(pb);
2782  if (grouping_type != MKTAG( 'r','a','p',' '))
2783  return 0; /* only support 'rap ' grouping */
2784  if (version == 1)
2785  avio_rb32(pb); /* grouping_type_parameter */
2786 
2787  entries = avio_rb32(pb);
2788  if (!entries)
2789  return 0;
2790  if (sc->rap_group)
2791  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2792  av_free(sc->rap_group);
2793  sc->rap_group_count = 0;
2794  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2795  if (!sc->rap_group)
2796  return AVERROR(ENOMEM);
2797 
2798  for (i = 0; i < entries && !pb->eof_reached; i++) {
2799  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2800  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2801  }
2802 
2803  sc->rap_group_count = i;
2804 
2805  return pb->eof_reached ? AVERROR_EOF : 0;
2806 }
2807 
2808 /**
2809  * Get ith edit list entry (media time, duration).
2810  */
2812  const MOVStreamContext *msc,
2813  unsigned int edit_list_index,
2814  int64_t *edit_list_media_time,
2815  int64_t *edit_list_duration,
2816  int64_t global_timescale)
2817 {
2818  if (edit_list_index == msc->elst_count) {
2819  return 0;
2820  }
2821  *edit_list_media_time = msc->elst_data[edit_list_index].time;
2822  *edit_list_duration = msc->elst_data[edit_list_index].duration;
2823 
2824  /* duration is in global timescale units;convert to msc timescale */
2825  if (global_timescale == 0) {
2826  avpriv_request_sample(mov->fc, "Support for mvhd.timescale = 0 with editlists");
2827  return 0;
2828  }
2829  *edit_list_duration = av_rescale(*edit_list_duration, msc->time_scale,
2830  global_timescale);
2831  return 1;
2832 }
2833 
2834 /**
2835  * Find the closest previous frame to the timestamp, in e_old index
2836  * entries. Searching for just any frame / just key frames can be controlled by
2837  * last argument 'flag'.
2838  * Returns the index of the entry in st->index_entries if successful,
2839  * else returns -1.
2840  */
2842  AVIndexEntry *e_old,
2843  int nb_old,
2844  int64_t timestamp,
2845  int flag)
2846 {
2847  AVIndexEntry *e_keep = st->index_entries;
2848  int nb_keep = st->nb_index_entries;
2849  int64_t found = -1;
2850  int64_t i = 0;
2851 
2852  st->index_entries = e_old;
2853  st->nb_index_entries = nb_old;
2854  found = av_index_search_timestamp(st, timestamp, flag | AVSEEK_FLAG_BACKWARD);
2855 
2856  // Keep going backwards in the index entries until the timestamp is the same.
2857  if (found >= 0) {
2858  for (i = found; i > 0 && e_old[i].timestamp == e_old[i - 1].timestamp;
2859  i--) {
2860  if ((flag & AVSEEK_FLAG_ANY) ||
2861  (e_old[i - 1].flags & AVINDEX_KEYFRAME)) {
2862  found = i - 1;
2863  }
2864  }
2865  }
2866 
2867  /* restore AVStream state*/
2868  st->index_entries = e_keep;
2869  st->nb_index_entries = nb_keep;
2870  return found;
2871 }
2872 
2873 /**
2874  * Add index entry with the given values, to the end of st->index_entries.
2875  * Returns the new size st->index_entries if successful, else returns -1.
2876  *
2877  * This function is similar to ff_add_index_entry in libavformat/utils.c
2878  * except that here we are always unconditionally adding an index entry to
2879  * the end, instead of searching the entries list and skipping the add if
2880  * there is an existing entry with the same timestamp.
2881  * This is needed because the mov_fix_index calls this func with the same
2882  * unincremented timestamp for successive discarded frames.
2883  */
2884 static int64_t add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2885  int size, int distance, int flags)
2886 {
2887  AVIndexEntry *entries, *ie;
2888  int64_t index = -1;
2889  const size_t min_size_needed = (st->nb_index_entries + 1) * sizeof(AVIndexEntry);
2890 
2891  // Double the allocation each time, to lower memory fragmentation.
2892  // Another difference from ff_add_index_entry function.
2893  const size_t requested_size =
2894  min_size_needed > st->index_entries_allocated_size ?
2895  FFMAX(min_size_needed, 2 * st->index_entries_allocated_size) :
2896  min_size_needed;
2897 
2898  if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
2899  return -1;
2900 
2901  entries = av_fast_realloc(st->index_entries,
2903  requested_size);
2904  if(!entries)
2905  return -1;
2906 
2907  st->index_entries= entries;
2908 
2909  index= st->nb_index_entries++;
2910  ie= &entries[index];
2911 
2912  ie->pos = pos;
2913  ie->timestamp = timestamp;
2914  ie->min_distance= distance;
2915  ie->size= size;
2916  ie->flags = flags;
2917  return index;
2918 }
2919 
2920 /**
2921  * Rewrite timestamps of index entries in the range [end_index - frame_duration_buffer_size, end_index)
2922  * by subtracting end_ts successively by the amounts given in frame_duration_buffer.
2923  */
2924 static void fix_index_entry_timestamps(AVStream* st, int end_index, int64_t end_ts,
2925  int64_t* frame_duration_buffer,
2926  int frame_duration_buffer_size) {
2927  int i = 0;
2928  av_assert0(end_index >= 0 && end_index <= st->nb_index_entries);
2929  for (i = 0; i < frame_duration_buffer_size; i++) {
2930  end_ts -= frame_duration_buffer[frame_duration_buffer_size - 1 - i];
2931  st->index_entries[end_index - 1 - i].timestamp = end_ts;
2932  }
2933 }
2934 
2935 /**
2936  * Append a new ctts entry to ctts_data.
2937  * Returns the new ctts_count if successful, else returns -1.
2938  */
2939 static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
2940  int count, int duration)
2941 {
2942  MOVStts *ctts_buf_new;
2943  const size_t min_size_needed = (*ctts_count + 1) * sizeof(MOVStts);
2944  const size_t requested_size =
2945  min_size_needed > *allocated_size ?
2946  FFMAX(min_size_needed, 2 * (*allocated_size)) :
2947  min_size_needed;
2948 
2949  if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts))
2950  return -1;
2951 
2952  ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);
2953 
2954  if(!ctts_buf_new)
2955  return -1;
2956 
2957  *ctts_data = ctts_buf_new;
2958 
2959  ctts_buf_new[*ctts_count].count = count;
2960  ctts_buf_new[*ctts_count].duration = duration;
2961 
2962  *ctts_count = (*ctts_count) + 1;
2963  return *ctts_count;
2964 }
2965 
2967 {
2968  sc->current_sample++;
2969  sc->current_index++;
2970  if (sc->index_ranges &&
2971  sc->current_index >= sc->current_index_range->end &&
2972  sc->current_index_range->end) {
2973  sc->current_index_range++;
2975  }
2976 }
2977 
2979 {
2980  sc->current_sample--;
2981  sc->current_index--;
2982  if (sc->index_ranges &&
2984  sc->current_index_range > sc->index_ranges) {
2985  sc->current_index_range--;
2986  sc->current_index = sc->current_index_range->end - 1;
2987  }
2988 }
2989 
2990 static void mov_current_sample_set(MOVStreamContext *sc, int current_sample)
2991 {
2992  int64_t range_size;
2993 
2994  sc->current_sample = current_sample;
2995  sc->current_index = current_sample;
2996  if (!sc->index_ranges) {
2997  return;
2998  }
2999 
3000  for (sc->current_index_range = sc->index_ranges;
3001  sc->current_index_range->end;
3002  sc->current_index_range++) {
3003  range_size = sc->current_index_range->end - sc->current_index_range->start;
3004  if (range_size > current_sample) {
3005  sc->current_index = sc->current_index_range->start + current_sample;
3006  break;
3007  }
3008  current_sample -= range_size;
3009  }
3010 }
3011 
3012 /**
3013  * Fix st->index_entries, so that it contains only the entries (and the entries
3014  * which are needed to decode them) that fall in the edit list time ranges.
3015  * Also fixes the timestamps of the index entries to match the timeline
3016  * specified the edit lists.
3017  */
3018 static void mov_fix_index(MOVContext *mov, AVStream *st)
3019 {
3020  MOVStreamContext *msc = st->priv_data;
3021  AVIndexEntry *e_old = st->index_entries;
3022  int nb_old = st->nb_index_entries;
3023  const AVIndexEntry *e_old_end = e_old + nb_old;
3024  const AVIndexEntry *current = NULL;
3025  MOVStts *ctts_data_old = msc->ctts_data;
3026  int64_t ctts_index_old = 0;
3027  int64_t ctts_sample_old = 0;
3028  int64_t ctts_count_old = msc->ctts_count;
3029  int64_t edit_list_media_time = 0;
3030  int64_t edit_list_duration = 0;
3031  int64_t frame_duration = 0;
3032  int64_t edit_list_dts_counter = 0;
3033  int64_t edit_list_dts_entry_end = 0;
3034  int64_t edit_list_start_ctts_sample = 0;
3035  int64_t curr_cts;
3036  int64_t edit_list_index = 0;
3037  int64_t index;
3038  int64_t index_ctts_count;
3039  int flags;
3040  unsigned int ctts_allocated_size = 0;
3041  int64_t start_dts = 0;
3042  int64_t edit_list_media_time_dts = 0;
3043  int64_t edit_list_start_encountered = 0;
3044  int64_t search_timestamp = 0;
3045  int64_t* frame_duration_buffer = NULL;
3046  int num_discarded_begin = 0;
3047  int first_non_zero_audio_edit = -1;
3048  int packet_skip_samples = 0;
3049  MOVIndexRange *current_index_range;
3050 
3051  if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
3052  return;
3053  }
3054 
3055  // allocate the index ranges array
3056  msc->index_ranges = av_malloc((msc->elst_count + 1) * sizeof(msc->index_ranges[0]));
3057  if (!msc->index_ranges) {
3058  av_log(mov->fc, AV_LOG_ERROR, "Cannot allocate index ranges buffer\n");
3059  return;
3060  }
3061  msc->current_index_range = msc->index_ranges;
3062  current_index_range = msc->index_ranges - 1;
3063 
3064  // Clean AVStream from traces of old index
3065  st->index_entries = NULL;
3067  st->nb_index_entries = 0;
3068 
3069  // Clean ctts fields of MOVStreamContext
3070  msc->ctts_data = NULL;
3071  msc->ctts_count = 0;
3072  msc->ctts_index = 0;
3073  msc->ctts_sample = 0;
3074 
3075  // If the dts_shift is positive (in case of negative ctts values in mov),
3076  // then negate the DTS by dts_shift
3077  if (msc->dts_shift > 0)
3078  edit_list_dts_entry_end -= msc->dts_shift;
3079 
3080  // Offset the DTS by ctts[0] to make the PTS of the first frame 0
3081  if (ctts_data_old && ctts_count_old > 0) {
3082  edit_list_dts_entry_end -= ctts_data_old[0].duration;
3083  av_log(mov->fc, AV_LOG_DEBUG, "Offset DTS by ctts[%d].duration: %d\n", 0, ctts_data_old[0].duration);
3084  }
3085 
3086  start_dts = edit_list_dts_entry_end;
3087 
3088  while (get_edit_list_entry(mov, msc, edit_list_index, &edit_list_media_time,
3089  &edit_list_duration, mov->time_scale)) {
3090  av_log(mov->fc, AV_LOG_DEBUG, "Processing st: %d, edit list %"PRId64" - media time: %"PRId64", duration: %"PRId64"\n",
3091  st->index, edit_list_index, edit_list_media_time, edit_list_duration);
3092  edit_list_index++;
3093  edit_list_dts_counter = edit_list_dts_entry_end;
3094  edit_list_dts_entry_end += edit_list_duration;
3095  num_discarded_begin = 0;
3096  if (edit_list_media_time == -1) {
3097  continue;
3098  }
3099 
3100  // If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
3101  // according to the edit list below.
3102  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3103  if (first_non_zero_audio_edit < 0) {
3104  first_non_zero_audio_edit = 1;
3105  } else {
3106  first_non_zero_audio_edit = 0;
3107  }
3108 
3109  if (first_non_zero_audio_edit > 0)
3110  st->skip_samples = msc->start_pad = 0;
3111  }
3112 
3113  //find closest previous key frame
3114  edit_list_media_time_dts = edit_list_media_time;
3115  if (msc->dts_shift > 0) {
3116  edit_list_media_time_dts -= msc->dts_shift;
3117  }
3118 
3119  // While reordering frame index according to edit list we must handle properly
3120  // the scenario when edit list entry starts from none key frame.
3121  // We find closest previous key frame and preserve it and consequent frames in index.
3122  // All frames which are outside edit list entry time boundaries will be dropped after decoding.
3123  search_timestamp = edit_list_media_time_dts;
3124  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3125  // Audio decoders like AAC need need a decoder delay samples previous to the current sample,
3126  // to correctly decode this frame. Hence for audio we seek to a frame 1 sec. before the
3127  // edit_list_media_time to cover the decoder delay.
3128  search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
3129  }
3130 
3131  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, 0);
3132  if (index == -1) {
3133  av_log(mov->fc, AV_LOG_WARNING,
3134  "st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
3135  st->index, edit_list_index, search_timestamp);
3136  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, AVSEEK_FLAG_ANY);
3137 
3138  if (index == -1) {
3139  av_log(mov->fc, AV_LOG_WARNING,
3140  "st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n"
3141  "Rounding edit list media time to zero.\n",
3142  st->index, edit_list_index, search_timestamp);
3143  index = 0;
3144  edit_list_media_time = 0;
3145  }
3146  }
3147  current = e_old + index;
3148 
3149  ctts_index_old = 0;
3150  ctts_sample_old = 0;
3151 
3152  // set ctts_index properly for the found key frame
3153  for (index_ctts_count = 0; index_ctts_count < index; index_ctts_count++) {
3154  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3155  ctts_sample_old++;
3156  if (ctts_data_old[ctts_index_old].count == ctts_sample_old) {
3157  ctts_index_old++;
3158  ctts_sample_old = 0;
3159  }
3160  }
3161  }
3162 
3163  edit_list_start_ctts_sample = ctts_sample_old;
3164 
3165  // Iterate over index and arrange it according to edit list
3166  edit_list_start_encountered = 0;
3167  for (; current < e_old_end; current++, index++) {
3168  // check if frame outside edit list mark it for discard
3169  frame_duration = (current + 1 < e_old_end) ?
3170  ((current + 1)->timestamp - current->timestamp) : edit_list_duration;
3171 
3172  flags = current->flags;
3173 
3174  // frames (pts) before or after edit list
3175  curr_cts = current->timestamp + msc->dts_shift;
3176 
3177  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3178  av_log(mov->fc, AV_LOG_DEBUG, "shifted frame pts, curr_cts: %"PRId64" @ %"PRId64", ctts: %d, ctts_count: %"PRId64"\n",
3179  curr_cts, ctts_index_old, ctts_data_old[ctts_index_old].duration, ctts_count_old);
3180  curr_cts += ctts_data_old[ctts_index_old].duration;
3181  ctts_sample_old++;
3182  if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
3183  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3184  &ctts_allocated_size,
3185  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3186  ctts_data_old[ctts_index_old].duration) == -1) {
3187  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3188  ctts_index_old,
3189  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3190  ctts_data_old[ctts_index_old].duration);
3191  break;
3192  }
3193  ctts_index_old++;
3194  ctts_sample_old = 0;
3195  edit_list_start_ctts_sample = 0;
3196  }
3197  }
3198 
3199  if (curr_cts < edit_list_media_time || curr_cts >= (edit_list_duration + edit_list_media_time)) {
3201  curr_cts < edit_list_media_time && curr_cts + frame_duration > edit_list_media_time &&
3202  first_non_zero_audio_edit > 0) {
3203  packet_skip_samples = edit_list_media_time - curr_cts;
3204  st->skip_samples += packet_skip_samples;
3205 
3206  // Shift the index entry timestamp by packet_skip_samples to be correct.
3207  edit_list_dts_counter -= packet_skip_samples;
3208  if (edit_list_start_encountered == 0) {
3209  edit_list_start_encountered = 1;
3210  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3211  // discarded packets.
3212  if (frame_duration_buffer) {
3213  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3214  frame_duration_buffer, num_discarded_begin);
3215  av_freep(&frame_duration_buffer);
3216  }
3217  }
3218 
3219  av_log(mov->fc, AV_LOG_DEBUG, "skip %d audio samples from curr_cts: %"PRId64"\n", packet_skip_samples, curr_cts);
3220  } else {
3221  flags |= AVINDEX_DISCARD_FRAME;
3222  av_log(mov->fc, AV_LOG_DEBUG, "drop a frame at curr_cts: %"PRId64" @ %"PRId64"\n", curr_cts, index);
3223 
3224  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && edit_list_start_encountered == 0) {
3225  num_discarded_begin++;
3226  frame_duration_buffer = av_realloc(frame_duration_buffer,
3227  num_discarded_begin * sizeof(int64_t));
3228  if (!frame_duration_buffer) {
3229  av_log(mov->fc, AV_LOG_ERROR, "Cannot reallocate frame duration buffer\n");
3230  break;
3231  }
3232  frame_duration_buffer[num_discarded_begin - 1] = frame_duration;
3233 
3234  // Increment skip_samples for the first non-zero audio edit list
3235  if (first_non_zero_audio_edit > 0 && st->codecpar->codec_id != AV_CODEC_ID_VORBIS) {
3236  st->skip_samples += frame_duration;
3237  msc->start_pad = st->skip_samples;
3238  }
3239  }
3240  }
3241  } else if (edit_list_start_encountered == 0) {
3242  edit_list_start_encountered = 1;
3243  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3244  // discarded packets.
3245  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && frame_duration_buffer) {
3246  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3247  frame_duration_buffer, num_discarded_begin);
3248  av_freep(&frame_duration_buffer);
3249  }
3250  }
3251 
3252  if (add_index_entry(st, current->pos, edit_list_dts_counter, current->size,
3253  current->min_distance, flags) == -1) {
3254  av_log(mov->fc, AV_LOG_ERROR, "Cannot add index entry\n");
3255  break;
3256  }
3257 
3258  // Update the index ranges array
3259  if (current_index_range < msc->index_ranges || index != current_index_range->end) {
3260  current_index_range++;
3261  current_index_range->start = index;
3262  }
3263  current_index_range->end = index + 1;
3264 
3265  // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list.
3266  if (edit_list_start_encountered > 0) {
3267  edit_list_dts_counter = edit_list_dts_counter + frame_duration;
3268  }
3269 
3270  // Break when found first key frame after edit entry completion
3271  if (((curr_cts + frame_duration) >= (edit_list_duration + edit_list_media_time)) &&
3272  ((flags & AVINDEX_KEYFRAME) || ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)))) {
3273 
3274  if (ctts_data_old && ctts_sample_old != 0) {
3275  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3276  &ctts_allocated_size,
3277  ctts_sample_old - edit_list_start_ctts_sample,
3278  ctts_data_old[ctts_index_old].duration) == -1) {
3279  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3280  ctts_index_old, ctts_sample_old - edit_list_start_ctts_sample,
3281  ctts_data_old[ctts_index_old].duration);
3282  break;
3283  }
3284  }
3285  break;
3286  }
3287  }
3288  }
3289  // Update av stream length
3290  st->duration = edit_list_dts_entry_end - start_dts;
3291 
3292  // Free the old index and the old CTTS structures
3293  av_free(e_old);
3294  av_free(ctts_data_old);
3295 
3296  // Null terminate the index ranges array
3297  current_index_range++;
3298  current_index_range->start = 0;
3299  current_index_range->end = 0;
3300  msc->current_index = msc->index_ranges[0].start;
3301 }
3302 
3303 static void mov_build_index(MOVContext *mov, AVStream *st)
3304 {
3305  MOVStreamContext *sc = st->priv_data;
3306  int64_t current_offset;
3307  int64_t current_dts = 0;
3308  unsigned int stts_index = 0;
3309  unsigned int stsc_index = 0;
3310  unsigned int stss_index = 0;
3311  unsigned int stps_index = 0;
3312  unsigned int i, j;
3313  uint64_t stream_size = 0;
3314 
3315  if (sc->elst_count) {
3316  int i, edit_start_index = 0;
3317  int64_t empty_duration = 0; // empty duration of the first edit list entry
3318  int64_t start_time = 0; // start time of the media
3319 
3320  for (i = 0; i < sc->elst_count; i++) {
3321  const MOVElst *e = &sc->elst_data[i];
3322  if (i == 0 && e->time == -1) {
3323  /* if empty, the first entry is the start time of the stream
3324  * relative to the presentation itself */
3325  empty_duration = e->duration;
3326  edit_start_index = 1;
3327  } else if (i == edit_start_index && e->time >= 0) {
3328  start_time = e->time;
3329  }
3330  }
3331 
3332  /* adjust first dts according to edit list */
3333  if ((empty_duration || start_time) && mov->time_scale > 0) {
3334  if (empty_duration)
3335  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
3336  sc->time_offset = start_time - empty_duration;
3337  }
3338  }
3339 
3340  /* only use old uncompressed audio chunk demuxing when stts specifies it */
3341  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3342  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
3343  unsigned int current_sample = 0;
3344  unsigned int stts_sample = 0;
3345  unsigned int sample_size;
3346  unsigned int distance = 0;
3347  unsigned int rap_group_index = 0;
3348  unsigned int rap_group_sample = 0;
3349  int64_t last_dts = 0;
3350  int64_t dts_correction = 0;
3351  int rap_group_present = sc->rap_group_count && sc->rap_group;
3352  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
3353 
3354  current_dts -= sc->dts_shift;
3355  last_dts = current_dts;
3356 
3357  if (!sc->sample_count || st->nb_index_entries)
3358  return;
3359  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3360  return;
3362  st->nb_index_entries + sc->sample_count,
3363  sizeof(*st->index_entries)) < 0) {
3364  st->nb_index_entries = 0;
3365  return;
3366  }
3368 
3369  for (i = 0; i < sc->chunk_count; i++) {
3370  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
3371  current_offset = sc->chunk_offsets[i];
3372  while (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3373  i + 1 == sc->stsc_data[stsc_index + 1].first)
3374  stsc_index++;
3375 
3376  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
3377  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
3378  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
3379  sc->stsz_sample_size = sc->sample_size;
3380  }
3381  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
3382  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
3383  sc->stsz_sample_size = sc->sample_size;
3384  }
3385 
3386  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
3387  int keyframe = 0;
3388  if (current_sample >= sc->sample_count) {
3389  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
3390  return;
3391  }
3392 
3393  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
3394  keyframe = 1;
3395  if (stss_index + 1 < sc->keyframe_count)
3396  stss_index++;
3397  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
3398  keyframe = 1;
3399  if (stps_index + 1 < sc->stps_count)
3400  stps_index++;
3401  }
3402  if (rap_group_present && rap_group_index < sc->rap_group_count) {
3403  if (sc->rap_group[rap_group_index].index > 0)
3404  keyframe = 1;
3405  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
3406  rap_group_sample = 0;
3407  rap_group_index++;
3408  }
3409  }
3410  if (sc->keyframe_absent
3411  && !sc->stps_count
3412  && !rap_group_present
3413  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
3414  keyframe = 1;
3415  if (keyframe)
3416  distance = 0;
3417  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
3418  if (sc->pseudo_stream_id == -1 ||
3419  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
3420  AVIndexEntry *e;
3421  if (sample_size > 0x3FFFFFFF) {
3422  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
3423  return;
3424  }
3425  e = &st->index_entries[st->nb_index_entries++];
3426  e->pos = current_offset;
3427  e->timestamp = current_dts;
3428  e->size = sample_size;
3429  e->min_distance = distance;
3430  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
3431  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3432  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
3433  current_offset, current_dts, sample_size, distance, keyframe);
3434  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
3435  ff_rfps_add_frame(mov->fc, st, current_dts);
3436  }
3437 
3438  current_offset += sample_size;
3439  stream_size += sample_size;
3440 
3441  /* A negative sample duration is invalid based on the spec,
3442  * but some samples need it to correct the DTS. */
3443  if (sc->stts_data[stts_index].duration < 0) {
3444  av_log(mov->fc, AV_LOG_WARNING,
3445  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
3446  sc->stts_data[stts_index].duration, stts_index,
3447  st->index);
3448  dts_correction += sc->stts_data[stts_index].duration - 1;
3449  sc->stts_data[stts_index].duration = 1;
3450  }
3451  current_dts += sc->stts_data[stts_index].duration;
3452  if (!dts_correction || current_dts + dts_correction > last_dts) {
3453  current_dts += dts_correction;
3454  dts_correction = 0;
3455  } else {
3456  /* Avoid creating non-monotonous DTS */
3457  dts_correction += current_dts - last_dts - 1;
3458  current_dts = last_dts + 1;
3459  }
3460  last_dts = current_dts;
3461  distance++;
3462  stts_sample++;
3463  current_sample++;
3464  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
3465  stts_sample = 0;
3466  stts_index++;
3467  }
3468  }
3469  }
3470  if (st->duration > 0)
3471  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
3472  } else {
3473  unsigned chunk_samples, total = 0;
3474 
3475  // compute total chunk count
3476  for (i = 0; i < sc->stsc_count; i++) {
3477  unsigned count, chunk_count;
3478 
3479  chunk_samples = sc->stsc_data[i].count;
3480  if (i != sc->stsc_count - 1 &&
3481  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
3482  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
3483  return;
3484  }
3485 
3486  if (sc->samples_per_frame >= 160) { // gsm
3487  count = chunk_samples / sc->samples_per_frame;
3488  } else if (sc->samples_per_frame > 1) {
3489  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
3490  count = (chunk_samples+samples-1) / samples;
3491  } else {
3492  count = (chunk_samples+1023) / 1024;
3493  }
3494 
3495  if (mov_stsc_index_valid(i, sc->stsc_count))
3496  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
3497  else
3498  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
3499  total += chunk_count * count;
3500  }
3501 
3502  av_log(mov->fc, AV_LOG_TRACE, "chunk count %d\n", total);
3503  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3504  return;
3506  st->nb_index_entries + total,
3507  sizeof(*st->index_entries)) < 0) {
3508  st->nb_index_entries = 0;
3509  return;
3510  }
3511  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
3512 
3513  // populate index
3514  for (i = 0; i < sc->chunk_count; i++) {
3515  current_offset = sc->chunk_offsets[i];
3516  if (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3517  i + 1 == sc->stsc_data[stsc_index + 1].first)
3518  stsc_index++;
3519  chunk_samples = sc->stsc_data[stsc_index].count;
3520 
3521  while (chunk_samples > 0) {
3522  AVIndexEntry *e;
3523  unsigned size, samples;
3524 
3525  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3527  "Zero bytes per frame, but %d samples per frame",
3528  sc->samples_per_frame);
3529  return;
3530  }
3531 
3532  if (sc->samples_per_frame >= 160) { // gsm
3533  samples = sc->samples_per_frame;
3534  size = sc->bytes_per_frame;
3535  } else {
3536  if (sc->samples_per_frame > 1) {
3537  samples = FFMIN((1024 / sc->samples_per_frame)*
3538  sc->samples_per_frame, chunk_samples);
3539  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3540  } else {
3541  samples = FFMIN(1024, chunk_samples);
3542  size = samples * sc->sample_size;
3543  }
3544  }
3545 
3546  if (st->nb_index_entries >= total) {
3547  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
3548  return;
3549  }
3550  if (size > 0x3FFFFFFF) {
3551  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
3552  return;
3553  }
3554  e = &st->index_entries[st->nb_index_entries++];
3555  e->pos = current_offset;
3556  e->timestamp = current_dts;
3557  e->size = size;
3558  e->min_distance = 0;
3559  e->flags = AVINDEX_KEYFRAME;
3560  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
3561  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
3562  size, samples);
3563 
3564  current_offset += size;
3565  current_dts += samples;
3566  chunk_samples -= samples;
3567  }
3568  }
3569  }
3570 
3571  // Fix index according to edit lists.
3572  mov_fix_index(mov, st);
3573 }
3574 
3575 static int test_same_origin(const char *src, const char *ref) {
3576  char src_proto[64];
3577  char ref_proto[64];
3578  char src_auth[256];
3579  char ref_auth[256];
3580  char src_host[256];
3581  char ref_host[256];
3582  int src_port=-1;
3583  int ref_port=-1;
3584 
3585  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
3586  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
3587 
3588  if (strlen(src) == 0) {
3589  return -1;
3590  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
3591  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
3592  strlen(src_host) + 1 >= sizeof(src_host) ||
3593  strlen(ref_host) + 1 >= sizeof(ref_host)) {
3594  return 0;
3595  } else if (strcmp(src_proto, ref_proto) ||
3596  strcmp(src_auth, ref_auth) ||
3597  strcmp(src_host, ref_host) ||
3598  src_port != ref_port) {
3599  return 0;
3600  } else
3601  return 1;
3602 }
3603 
3604 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
3605 {
3606  /* try relative path, we do not try the absolute because it can leak information about our
3607  system to an attacker */
3608  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
3609  char filename[1025];
3610  const char *src_path;
3611  int i, l;
3612 
3613  /* find a source dir */
3614  src_path = strrchr(src, '/');
3615  if (src_path)
3616  src_path++;
3617  else
3618  src_path = src;
3619 
3620  /* find a next level down to target */
3621  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
3622  if (ref->path[l] == '/') {
3623  if (i == ref->nlvl_to - 1)
3624  break;
3625  else
3626  i++;
3627  }
3628 
3629  /* compose filename if next level down to target was found */
3630  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3631  memcpy(filename, src, src_path - src);
3632  filename[src_path - src] = 0;
3633 
3634  for (i = 1; i < ref->nlvl_from; i++)
3635  av_strlcat(filename, "../", sizeof(filename));
3636 
3637  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3638  if (!c->use_absolute_path) {
3639  int same_origin = test_same_origin(src, filename);
3640 
3641  if (!same_origin) {
3642  av_log(c->fc, AV_LOG_ERROR,
3643  "Reference with mismatching origin, %s not tried for security reasons, "
3644  "set demuxer option use_absolute_path to allow it anyway\n",
3645  ref->path);
3646  return AVERROR(ENOENT);
3647  }
3648 
3649  if(strstr(ref->path + l + 1, "..") ||
3650  strstr(ref->path + l + 1, ":") ||
3651  (ref->nlvl_from > 1 && same_origin < 0) ||
3652  (filename[0] == '/' && src_path == src))
3653  return AVERROR(ENOENT);
3654  }
3655 
3656  if (strlen(filename) + 1 == sizeof(filename))
3657  return AVERROR(ENOENT);
3658  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3659  return 0;
3660  }
3661  } else if (c->use_absolute_path) {
3662  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3663  "this is a possible security issue\n");
3664  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3665  return 0;
3666  } else {
3667  av_log(c->fc, AV_LOG_ERROR,
3668  "Absolute path %s not tried for security reasons, "
3669  "set demuxer option use_absolute_path to allow absolute paths\n",
3670  ref->path);
3671  }
3672 
3673  return AVERROR(ENOENT);
3674 }
3675 
3677 {
3678  if (sc->time_scale <= 0) {
3679  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3680  sc->time_scale = c->time_scale;
3681  if (sc->time_scale <= 0)
3682  sc->time_scale = 1;
3683  }
3684 }
3685 
3687 {
3688  AVStream *st;
3689  MOVStreamContext *sc;
3690  int ret;
3691 
3692  st = avformat_new_stream(c->fc, NULL);
3693  if (!st) return AVERROR(ENOMEM);
3694  st->id = c->fc->nb_streams;
3695  sc = av_mallocz(sizeof(MOVStreamContext));
3696  if (!sc) return AVERROR(ENOMEM);
3697 
3698  st->priv_data = sc;
3700  sc->ffindex = st->index;
3701  c->trak_index = st->index;
3702 
3703  if ((ret = mov_read_default(c, pb, atom)) < 0)
3704  return ret;
3705 
3706  c->trak_index = -1;
3707 
3708  /* sanity checks */
3709  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3710  (!sc->sample_size && !sc->sample_count))) {
3711  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3712  st->index);
3713  return 0;
3714  }
3715 
3716  fix_timescale(c, sc);
3717 
3718  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3719 
3720  mov_build_index(c, st);
3721 
3722  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3723  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3724  if (c->enable_drefs) {
3725  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3726  av_log(c->fc, AV_LOG_ERROR,
3727  "stream %d, error opening alias: path='%s', dir='%s', "
3728  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3729  st->index, dref->path, dref->dir, dref->filename,
3730  dref->volume, dref->nlvl_from, dref->nlvl_to);
3731  } else {
3732  av_log(c->fc, AV_LOG_WARNING,
3733  "Skipped opening external track: "
3734  "stream %d, alias: path='%s', dir='%s', "
3735  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3736  "Set enable_drefs to allow this.\n",
3737  st->index, dref->path, dref->dir, dref->filename,
3738  dref->volume, dref->nlvl_from, dref->nlvl_to);
3739  }
3740  } else {
3741  sc->pb = c->fc->pb;
3742  sc->pb_is_copied = 1;
3743  }
3744 
3745  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3746  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3747  sc->height && sc->width &&
3748  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3749  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3750  ((double)st->codecpar->width * sc->height), INT_MAX);
3751  }
3752 
3753 #if FF_API_R_FRAME_RATE
3754  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3756  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3757 #endif
3758  }
3759 
3760  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3761  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3762  TAG_IS_AVCI(st->codecpar->codec_tag)) {
3763  ret = ff_generate_avci_extradata(st);
3764  if (ret < 0)
3765  return ret;
3766  }
3767 
3768  switch (st->codecpar->codec_id) {
3769 #if CONFIG_H261_DECODER
3770  case AV_CODEC_ID_H261:
3771 #endif
3772 #if CONFIG_H263_DECODER
3773  case AV_CODEC_ID_H263:
3774 #endif
3775 #if CONFIG_MPEG4_DECODER
3776  case AV_CODEC_ID_MPEG4:
3777 #endif
3778  st->codecpar->width = 0; /* let decoder init width/height */
3779  st->codecpar->height= 0;
3780  break;
3781  }
3782 
3783  // If the duration of the mp3 packets is not constant, then they could need a parser
3784  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3785  && sc->stts_count > 3
3786  && sc->stts_count*10 > st->nb_frames
3787  && sc->time_scale == st->codecpar->sample_rate) {
3789  }
3790  /* Do not need those anymore. */
3791  av_freep(&sc->chunk_offsets);
3792  av_freep(&sc->sample_sizes);
3793  av_freep(&sc->keyframes);
3794  av_freep(&sc->stts_data);
3795  av_freep(&sc->stps_data);
3796  av_freep(&sc->elst_data);
3797  av_freep(&sc->rap_group);
3798 
3799  return 0;
3800 }
3801 
3803 {
3804  int ret;
3805  c->itunes_metadata = 1;
3806  ret = mov_read_default(c, pb, atom);
3807  c->itunes_metadata = 0;
3808  return ret;
3809 }
3810 
3812 {
3813  uint32_t count;
3814  uint32_t i;
3815 
3816  if (atom.size < 8)
3817  return 0;
3818 
3819  avio_skip(pb, 4);
3820  count = avio_rb32(pb);
3821  if (count > UINT_MAX / sizeof(*c->meta_keys) - 1) {
3822  av_log(c->fc, AV_LOG_ERROR,
3823  "The 'keys' atom with the invalid key count: %d\n", count);
3824  return AVERROR_INVALIDDATA;
3825  }
3826 
3827  c->meta_keys_count = count + 1;
3828  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3829  if (!c->meta_keys)
3830  return AVERROR(ENOMEM);
3831 
3832  for (i = 1; i <= count; ++i) {
3833  uint32_t key_size = avio_rb32(pb);
3834  uint32_t type = avio_rl32(pb);
3835  if (key_size < 8) {
3836  av_log(c->fc, AV_LOG_ERROR,
3837  "The key# %d in meta has invalid size: %d\n", i, key_size);
3838  return AVERROR_INVALIDDATA;
3839  }
3840  key_size -= 8;
3841  if (type != MKTAG('m','d','t','a')) {
3842  avio_skip(pb, key_size);
3843  }
3844  c->meta_keys[i] = av_mallocz(key_size + 1);
3845  if (!c->meta_keys[i])
3846  return AVERROR(ENOMEM);
3847  avio_read(pb, c->meta_keys[i], key_size);
3848  }
3849 
3850  return 0;
3851 }
3852 
3854 {
3855  int64_t end = avio_tell(pb) + atom.size;
3856  uint8_t *key = NULL, *val = NULL, *mean = NULL;
3857  int i;
3858  int ret = 0;
3859  AVStream *st;
3860  MOVStreamContext *sc;
3861 
3862  if (c->fc->nb_streams < 1)
3863  return 0;
3864  st = c->fc->streams[c->fc->nb_streams-1];
3865  sc = st->priv_data;
3866 
3867  for (i = 0; i < 3; i++) {
3868  uint8_t **p;
3869  uint32_t len, tag;
3870 
3871  if (end - avio_tell(pb) <= 12)
3872  break;
3873 
3874  len = avio_rb32(pb);
3875  tag = avio_rl32(pb);
3876  avio_skip(pb, 4); // flags
3877 
3878  if (len < 12 || len - 12 > end - avio_tell(pb))
3879  break;
3880  len -= 12;
3881 
3882  if (tag == MKTAG('m', 'e', 'a', 'n'))
3883  p = &mean;
3884  else if (tag == MKTAG('n', 'a', 'm', 'e'))
3885  p = &key;
3886  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3887  avio_skip(pb, 4);
3888  len -= 4;
3889  p = &val;
3890  } else
3891  break;
3892 
3893  *p = av_malloc(len + 1);
3894  if (!*p)
3895  break;
3896  ret = ffio_read_size(pb, *p, len);
3897  if (ret < 0) {
3898  av_freep(p);
3899  break;
3900  }
3901  (*p)[len] = 0;
3902  }
3903 
3904  if (mean && key && val) {
3905  if (strcmp(key, "iTunSMPB") == 0) {
3906  int priming, remainder, samples;
3907  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3908  if(priming>0 && priming<16384)
3909  sc->start_pad = priming;
3910  }
3911  }
3912  if (strcmp(key, "cdec") != 0) {
3913  av_dict_set(&c->fc->metadata, key, val,
3915  key = val = NULL;
3916  }
3917  } else {
3918  av_log(c->fc, AV_LOG_VERBOSE,
3919  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3920  }
3921 
3922  avio_seek(pb, end, SEEK_SET);
3923  av_freep(&key);
3924  av_freep(&val);
3925  av_freep(&mean);
3926  return ret;
3927 }
3928 
3930 {
3931  while (atom.size > 8) {
3932  uint32_t tag = avio_rl32(pb);
3933  atom.size -= 4;
3934  if (tag == MKTAG('h','d','l','r')) {
3935  avio_seek(pb, -8, SEEK_CUR);
3936  atom.size += 8;
3937  return mov_read_default(c, pb, atom);
3938  }
3939  }
3940  return 0;
3941 }
3942 
3943 // return 1 when matrix is identity, 0 otherwise
3944 #define IS_MATRIX_IDENT(matrix) \
3945  ( (matrix)[0][0] == (1 << 16) && \
3946  (matrix)[1][1] == (1 << 16) && \
3947  (matrix)[2][2] == (1 << 30) && \
3948  !(matrix)[0][1] && !(matrix)[0][2] && \
3949  !(matrix)[1][0] && !(matrix)[1][2] && \
3950  !(matrix)[2][0] && !(matrix)[2][1])
3951 
3953 {
3954  int i, j, e;
3955  int width;
3956  int height;
3957  int display_matrix[3][3];
3958  int res_display_matrix[3][3] = { { 0 } };
3959  AVStream *st;
3960  MOVStreamContext *sc;
3961  int version;
3962  int flags;
3963 
3964  if (c->fc->nb_streams < 1)
3965  return 0;
3966  st = c->fc->streams[c->fc->nb_streams-1];
3967  sc = st->priv_data;
3968 
3969  version = avio_r8(pb);
3970  flags = avio_rb24(pb);
3972 
3973  if (version == 1) {
3974  avio_rb64(pb);
3975  avio_rb64(pb);
3976  } else {
3977  avio_rb32(pb); /* creation time */
3978  avio_rb32(pb); /* modification time */
3979  }
3980  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
3981  avio_rb32(pb); /* reserved */
3982 
3983  /* highlevel (considering edits) duration in movie timebase */
3984  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
3985  avio_rb32(pb); /* reserved */
3986  avio_rb32(pb); /* reserved */
3987 
3988  avio_rb16(pb); /* layer */
3989  avio_rb16(pb); /* alternate group */
3990  avio_rb16(pb); /* volume */
3991  avio_rb16(pb); /* reserved */
3992 
3993  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
3994  // they're kept in fixed point format through all calculations
3995  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
3996  // side data, but the scale factor is not needed to calculate aspect ratio
3997  for (i = 0; i < 3; i++) {
3998  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
3999  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
4000  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
4001  }
4002 
4003  width = avio_rb32(pb); // 16.16 fixed point track width
4004  height = avio_rb32(pb); // 16.16 fixed point track height
4005  sc->width = width >> 16;
4006  sc->height = height >> 16;
4007 
4008  // apply the moov display matrix (after the tkhd one)
4009  for (i = 0; i < 3; i++) {
4010  const int sh[3] = { 16, 16, 30 };
4011  for (j = 0; j < 3; j++) {
4012  for (e = 0; e < 3; e++) {
4013  res_display_matrix[i][j] +=
4014  ((int64_t) display_matrix[i][e] *
4015  c->movie_display_matrix[e][j]) >> sh[e];
4016  }
4017  }
4018  }
4019 
4020  // save the matrix when it is not the default identity
4021  if (!IS_MATRIX_IDENT(res_display_matrix)) {
4022  double rotate;
4023 
4024  av_freep(&sc->display_matrix);
4025  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
4026  if (!sc->display_matrix)
4027  return AVERROR(ENOMEM);
4028 
4029  for (i = 0; i < 3; i++)
4030  for (j = 0; j < 3; j++)
4031  sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
4032 
4034  if (!isnan(rotate)) {
4035  char rotate_buf[64];
4036  rotate = -rotate;
4037  if (rotate < 0) // for backward compatibility
4038  rotate += 360;
4039  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
4040  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
4041  }
4042  }
4043 
4044  // transform the display width/height according to the matrix
4045  // to keep the same scale, use [width height 1<<16]
4046  if (width && height && sc->display_matrix) {
4047  double disp_transform[2];
4048 
4049  for (i = 0; i < 2; i++)
4050  disp_transform[i] = hypot(sc->display_matrix[0 + i],
4051  sc->display_matrix[3 + i]);
4052 
4053  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
4054  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
4055  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
4057  disp_transform[0] / disp_transform[1],
4058  INT_MAX);
4059  }
4060  return 0;
4061 }
4062 
4064 {
4065  MOVFragment *frag = &c->fragment;
4066  MOVTrackExt *trex = NULL;
4068  int flags, track_id, i, found = 0;
4069 
4070  avio_r8(pb); /* version */
4071  flags = avio_rb24(pb);
4072 
4073  track_id = avio_rb32(pb);
4074  if (!track_id)
4075  return AVERROR_INVALIDDATA;
4076  frag->track_id = track_id;
4077  for (i = 0; i < c->trex_count; i++)
4078  if (c->trex_data[i].track_id == frag->track_id) {
4079  trex = &c->trex_data[i];
4080  break;
4081  }
4082  if (!trex) {
4083  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
4084  return AVERROR_INVALIDDATA;
4085  }
4086 
4089  frag->moof_offset : frag->implicit_offset;
4090  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
4091 
4092  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
4093  avio_rb32(pb) : trex->duration;
4094  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
4095  avio_rb32(pb) : trex->size;
4096  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
4097  avio_rb32(pb) : trex->flags;
4098  frag->time = AV_NOPTS_VALUE;
4099  for (i = 0; i < c->fragment_index_count; i++) {
4100  int j;
4101  MOVFragmentIndex* candidate = c->fragment_index_data[i];
4102  if (candidate->track_id == frag->track_id) {
4103  av_log(c->fc, AV_LOG_DEBUG,
4104  "found fragment index for track %u\n", frag->track_id);
4105  index = candidate;
4106  for (j = index->current_item; j < index->item_count; j++) {
4107  if (frag->implicit_offset == index->items[j].moof_offset) {
4108  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
4109  "for track %u and moof_offset %"PRId64"\n",
4110  frag->track_id, index->items[j].moof_offset);
4111  frag->time = index->items[j].time;
4112  index->current_item = j + 1;
4113  found = 1;
4114  break;
4115  }
4116  }
4117  if (found)
4118  break;
4119  }
4120  }
4121  if (index && !found) {
4122  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
4123  "it doesn't have an (in-order) entry for moof_offset "
4124  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
4125  }
4126  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
4127  return 0;
4128 }
4129 
4131 {
4132  unsigned i, num;
4133  void *new_tracks;
4134 
4135  num = atom.size / 4;
4136  if (!(new_tracks = av_malloc_array(num, sizeof(int))))
4137  return AVERROR(ENOMEM);
4138 
4139  av_free(c->chapter_tracks);
4140  c->chapter_tracks = new_tracks;
4141  c->nb_chapter_tracks = num;
4142 
4143  for (i = 0; i < num && !pb->eof_reached; i++)
4144  c->chapter_tracks[i] = avio_rb32(pb);
4145 
4146  return 0;
4147 }
4148 
4150 {
4151  MOVTrackExt *trex;
4152  int err;
4153 
4154  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
4155  return AVERROR_INVALIDDATA;
4156  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
4157  sizeof(*c->trex_data))) < 0) {
4158  c->trex_count = 0;
4159  return err;
4160  }
4161 
4162  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
4163 
4164  trex = &c->trex_data[c->trex_count++];
4165  avio_r8(pb); /* version */
4166  avio_rb24(pb); /* flags */
4167  trex->track_id = avio_rb32(pb);
4168  trex->stsd_id = avio_rb32(pb);
4169  trex->duration = avio_rb32(pb);
4170  trex->size = avio_rb32(pb);
4171  trex->flags = avio_rb32(pb);
4172  return 0;
4173 }
4174 
4176 {
4177  MOVFragment *frag = &c->fragment;
4178  AVStream *st = NULL;
4179  MOVStreamContext *sc;
4180  int version, i;
4181 
4182  for (i = 0; i < c->fc->nb_streams; i++) {
4183  if (c->fc->streams[i]->id == frag->track_id) {
4184  st = c->fc->streams[i];
4185  break;
4186  }
4187  }
4188  if (!st) {
4189  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
4190  return AVERROR_INVALIDDATA;
4191  }
4192  sc = st->priv_data;
4193  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
4194  return 0;
4195  version = avio_r8(pb);
4196  avio_rb24(pb); /* flags */
4197  if (version) {
4198  sc->track_end = avio_rb64(pb);
4199  } else {
4200  sc->track_end = avio_rb32(pb);
4201  }
4202  return 0;
4203 }
4204 
4206 {
4207  MOVFragment *frag = &c->fragment;
4208  AVStream *st = NULL;
4209  MOVStreamContext *sc;
4210  MOVStts *ctts_data;
4211  uint64_t offset;
4212  int64_t dts;
4213  int data_offset = 0;
4214  unsigned entries, first_sample_flags = frag->flags;
4215  int flags, distance, i, err;
4216 
4217  for (i = 0; i < c->fc->nb_streams; i++) {
4218  if (c->fc->streams[i]->id == frag->track_id) {
4219  st = c->fc->streams[i];
4220  break;
4221  }
4222  }
4223  if (!st) {
4224  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
4225  return AVERROR_INVALIDDATA;
4226  }
4227  sc = st->priv_data;
4228  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4229  return 0;
4230  avio_r8(pb); /* version */
4231  flags = avio_rb24(pb);
4232  entries = avio_rb32(pb);
4233  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %d\n", flags, entries);
4234 
4235  /* Always assume the presence of composition time offsets.
4236  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
4237  * 1) in the initial movie, there are no samples.
4238  * 2) in the first movie fragment, there is only one sample without composition time offset.
4239  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
4240  if (!sc->ctts_count && sc->sample_count)
4241  {
4242  /* Complement ctts table if moov atom doesn't have ctts atom. */
4243  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
4244  if (!ctts_data)
4245  return AVERROR(ENOMEM);
4246  sc->ctts_data = ctts_data;
4247  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
4248  sc->ctts_data[sc->ctts_count].duration = 0;
4249  sc->ctts_count++;
4250  }
4251  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
4252  return AVERROR_INVALIDDATA;
4253  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
4254  sizeof(*sc->ctts_data))) < 0) {
4255  sc->ctts_count = 0;
4256  return err;
4257  }
4258  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
4259  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
4260  dts = sc->track_end - sc->time_offset;
4261  offset = frag->base_data_offset + data_offset;
4262  distance = 0;
4263  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
4264  for (i = 0; i < entries && !pb->eof_reached; i++) {
4265  unsigned sample_size = frag->size;
4266  int sample_flags = i ? frag->flags : first_sample_flags;
4267  unsigned sample_duration = frag->duration;
4268  int keyframe = 0;
4269 
4270  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
4271  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
4272  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
4273  sc->ctts_data[sc->ctts_count].count = 1;
4274  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
4275  avio_rb32(pb) : 0;
4277  if (frag->time != AV_NOPTS_VALUE) {
4278  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
4279  int64_t pts = frag->time;
4280  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4281  " sc->dts_shift %d ctts.duration %d"
4282  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
4283  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
4284  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
4285  dts = pts - sc->dts_shift;
4286  if (flags & MOV_TRUN_SAMPLE_CTS) {
4287  dts -= sc->ctts_data[sc->ctts_count].duration;
4288  } else {
4289  dts -= sc->time_offset;
4290  }
4291  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
4292  } else {
4293  dts = frag->time - sc->time_offset;
4294  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4295  ", using it for dts\n", dts);
4296  }
4297  frag->time = AV_NOPTS_VALUE;
4298  }
4299  sc->ctts_count++;
4301  keyframe = 1;
4302  else
4303  keyframe =
4304  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
4306  if (keyframe)
4307  distance = 0;
4308  err = av_add_index_entry(st, offset, dts, sample_size, distance,
4309  keyframe ? AVINDEX_KEYFRAME : 0);
4310  if (err < 0) {
4311  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
4312  }
4313  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
4314  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
4315  offset, dts, sample_size, distance, keyframe);
4316  distance++;
4317  dts += sample_duration;
4318  offset += sample_size;
4319  sc->data_size += sample_size;
4320  sc->duration_for_fps += sample_duration;
4321  sc->nb_frames_for_fps ++;
4322  }
4323 
4324  if (pb->eof_reached)
4325  return AVERROR_EOF;
4326 
4327  frag->implicit_offset = offset;
4328 
4329  sc->track_end = dts + sc->time_offset;
4330  if (st->duration < sc->track_end)
4331  st->duration = sc->track_end;
4332 
4333  return 0;
4334 }
4335 
4337 {
4338  int64_t offset = avio_tell(pb) + atom.size, pts;
4339  uint8_t version;
4340  unsigned i, track_id;
4341  AVStream *st = NULL;
4342  AVStream *ref_st;
4343  MOVStreamContext *sc, *ref_sc;
4346  AVRational timescale;
4347 
4348  version = avio_r8(pb);
4349  if (version > 1) {
4350  avpriv_request_sample(c->fc, "sidx version %u", version);
4351  return 0;
4352  }
4353 
4354  avio_rb24(pb); // flags
4355 
4356  track_id = avio_rb32(pb); // Reference ID
4357  for (i = 0; i < c->fc->nb_streams; i++) {
4358  if (c->fc->streams[i]->id == track_id) {
4359  st = c->fc->streams[i];
4360  break;
4361  }
4362  }
4363  if (!st) {
4364  av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
4365  return 0;
4366  }
4367 
4368  sc = st->priv_data;
4369 
4370  timescale = av_make_q(1, avio_rb32(pb));
4371 
4372  if (timescale.den <= 0) {
4373  av_log(c->fc, AV_LOG_ERROR, "Invalid sidx timescale 1/%d\n", timescale.den);
4374  return AVERROR_INVALIDDATA;
4375  }
4376 
4377  if (version == 0) {
4378  pts = avio_rb32(pb);
4379  offset += avio_rb32(pb);
4380  } else {
4381  pts = avio_rb64(pb);
4382  offset += avio_rb64(pb);
4383  }
4384 
4385  avio_rb16(pb); // reserved
4386 
4387  index = av_mallocz(sizeof(MOVFragmentIndex));
4388  if (!index)
4389  return AVERROR(ENOMEM);
4390 
4391  index->track_id = track_id;
4392 
4393  index->item_count = avio_rb16(pb);
4394  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
4395 
4396  if (!index->items) {
4397  av_freep(&index);
4398  return AVERROR(ENOMEM);
4399  }
4400 
4401  for (i = 0; i < index->item_count; i++) {
4402  uint32_t size = avio_rb32(pb);
4403  uint32_t duration = avio_rb32(pb);
4404  if (size & 0x80000000) {
4405  avpriv_request_sample(c->fc, "sidx reference_type 1");
4406  av_freep(&index->items);
4407  av_freep(&index);
4408  return AVERROR_PATCHWELCOME;
4409  }
4410  avio_rb32(pb); // sap_flags
4411  index->items[i].moof_offset = offset;
4412  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
4413  offset += size;
4414  pts += duration;
4415  }
4416 
4417  st->duration = sc->track_end = pts;
4418 
4420  c->fragment_index_count + 1,
4421  sizeof(MOVFragmentIndex*));
4422  if (!tmp) {
4423  av_freep(&index->items);
4424  av_freep(&index);
4425  return AVERROR(ENOMEM);
4426  }
4427 
4428  c->fragment_index_data = tmp;
4430  sc->has_sidx = 1;
4431 
4432  if (offset == avio_size(pb)) {
4433  for (i = 0; i < c->fc->nb_streams; i++) {
4434  if (c->fc->streams[i]->id == c->fragment_index_data[0]->track_id) {
4435  ref_st = c->fc->streams[i];
4436  ref_sc = ref_st->priv_data;
4437  break;
4438  }
4439  }
4440  for (i = 0; i < c->fc->nb_streams; i++) {
4441  st = c->fc->streams[i];
4442  sc = st->priv_data;
4443  if (!sc->has_sidx) {
4444  st->duration = sc->track_end = av_rescale(ref_st->duration, sc->time_scale, ref_sc->time_scale);
4445  }
4446  }
4447 
4448  c->fragment_index_complete = 1;
4449  }
4450 
4451  return 0;
4452 }
4453 
4454 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
4455 /* like the files created with Adobe Premiere 5.0, for samples see */
4456 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
4458 {
4459  int err;
4460 
4461  if (atom.size < 8)
4462  return 0; /* continue */
4463  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
4464  avio_skip(pb, atom.size - 4);
4465  return 0;
4466  }
4467  atom.type = avio_rl32(pb);
4468  atom.size -= 8;
4469  if (atom.type != MKTAG('m','d','a','t')) {
4470  avio_skip(pb, atom.size);
4471  return 0;
4472  }
4473  err = mov_read_mdat(c, pb, atom);
4474  return err;
4475 }
4476 
4478 {
4479 #if CONFIG_ZLIB
4480  AVIOContext ctx;
4481  uint8_t *cmov_data;
4482  uint8_t *moov_data; /* uncompressed data */
4483  long cmov_len, moov_len;
4484  int ret = -1;
4485 
4486  avio_rb32(pb); /* dcom atom */
4487  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
4488  return AVERROR_INVALIDDATA;
4489  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
4490  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
4491  return AVERROR_INVALIDDATA;
4492  }
4493  avio_rb32(pb); /* cmvd atom */
4494  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
4495  return AVERROR_INVALIDDATA;
4496  moov_len = avio_rb32(pb); /* uncompressed size */
4497  cmov_len = atom.size - 6 * 4;
4498 
4499  cmov_data = av_malloc(cmov_len);
4500  if (!cmov_data)
4501  return AVERROR(ENOMEM);
4502  moov_data = av_malloc(moov_len);
4503  if (!moov_data) {
4504  av_free(cmov_data);
4505  return AVERROR(ENOMEM);
4506  }
4507  ret = ffio_read_size(pb, cmov_data, cmov_len);
4508  if (ret < 0)
4509  goto free_and_return;
4510 
4511  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
4512  goto free_and_return;
4513  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
4514  goto free_and_return;
4516  atom.type = MKTAG('m','o','o','v');
4517  atom.size = moov_len;
4518  ret = mov_read_default(c, &ctx, atom);
4519 free_and_return:
4520  av_free(moov_data);
4521  av_free(cmov_data);
4522  return ret;
4523 #else
4524  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
4525  return AVERROR(ENOSYS);
4526 #endif
4527 }
4528 
4529 /* edit list atom */
4531 {
4532  MOVStreamContext *sc;
4533  int i, edit_count, version;
4534 
4535  if (c->fc->nb_streams < 1 || c->ignore_editlist)
4536  return 0;
4537  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
4538 
4539  version = avio_r8(pb); /* version */
4540  avio_rb24(pb); /* flags */
4541  edit_count = avio_rb32(pb); /* entries */
4542 
4543  if (!edit_count)
4544  return 0;
4545  if (sc->elst_data)
4546  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
4547  av_free(sc->elst_data);
4548  sc->elst_count = 0;
4549  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
4550  if (!sc->elst_data)
4551  return AVERROR(ENOMEM);
4552 
4553  av_log(c->fc, AV_LOG_TRACE, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
4554  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
4555  MOVElst *e = &sc->elst_data[i];
4556 
4557  if (version == 1) {
4558  e->duration = avio_rb64(pb);
4559  e->time = avio_rb64(pb);
4560  } else {
4561  e->duration = avio_rb32(pb); /* segment duration */
4562  e->time = (int32_t)avio_rb32(pb); /* media time */
4563  }
4564  e->rate = avio_rb32(pb) / 65536.0;
4565  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
4566  e->duration, e->time, e->rate);
4567 
4568  if (e->time < 0 && e->time != -1 &&
4570  av_log(c->fc, AV_LOG_ERROR, "Track %d, edit %d: Invalid edit list media time=%"PRId64"\n",
4571  c->fc->nb_streams-1, i, e->time);
4572  return AVERROR_INVALIDDATA;
4573  }
4574  }
4575  sc->elst_count = i;
4576 
4577  return 0;
4578 }
4579 
4581 {
4582  MOVStreamContext *sc;
4583 
4584  if (c->fc->nb_streams < 1)
4585  return AVERROR_INVALIDDATA;
4586  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4587  sc->timecode_track = avio_rb32(pb);
4588  return 0;
4589 }
4590 
4592 {
4593  AVStream *st;
4594  MOVStreamContext *sc;
4595  enum AVStereo3DType type;
4596  int mode;
4597 
4598  if (c->fc->nb_streams < 1)
4599  return 0;
4600 
4601  st = c->fc->streams[c->fc->nb_streams - 1];
4602  sc = st->priv_data;
4603 
4604  if (atom.size < 5) {
4605  av_log(c->fc, AV_LOG_ERROR, "Empty stereoscopic video box\n");
4606  return AVERROR_INVALIDDATA;
4607  }
4608  avio_skip(pb, 4); /* version + flags */
4609 
4610  mode = avio_r8(pb);
4611  switch (mode) {
4612  case 0:
4613  type = AV_STEREO3D_2D;
4614  break;
4615  case 1:
4616  type = AV_STEREO3D_TOPBOTTOM;
4617  break;
4618  case 2:
4619  type = AV_STEREO3D_SIDEBYSIDE;
4620  break;
4621  default:
4622  av_log(c->fc, AV_LOG_WARNING, "Unknown st3d mode value %d\n", mode);
4623  return 0;
4624  }
4625 
4626  sc->stereo3d = av_stereo3d_alloc();
4627  if (!sc->stereo3d)
4628  return AVERROR(ENOMEM);
4629 
4630  sc->stereo3d->type = type;
4631  return 0;
4632 }
4633 
4635 {
4636  AVStream *st;
4637  MOVStreamContext *sc;
4638  int size, layout;
4639  int32_t yaw, pitch, roll;
4640  uint32_t l = 0, t = 0, r = 0, b = 0;
4641  uint32_t tag, padding = 0;
4642  enum AVSphericalProjection projection;
4643 
4644  if (c->fc->nb_streams < 1)
4645  return 0;
4646 
4647  st = c->fc->streams[c->fc->nb_streams - 1];
4648  sc = st->priv_data;
4649 
4650  if (atom.size < 8) {
4651  av_log(c->fc, AV_LOG_ERROR, "Empty spherical video box\n");
4652  return AVERROR_INVALIDDATA;
4653  }
4654 
4655  size = avio_rb32(pb);
4656  if (size <= 12 || size > atom.size)
4657  return AVERROR_INVALIDDATA;
4658 
4659  tag = avio_rl32(pb);
4660  if (tag != MKTAG('s','v','h','d')) {
4661  av_log(c->fc, AV_LOG_ERROR, "Missing spherical video header\n");
4662  return 0;
4663  }
4664  avio_skip(pb, 4); /* version + flags */
4665  avio_skip(pb, size - 12); /* metadata_source */
4666 
4667  size = avio_rb32(pb);
4668  if (size > atom.size)
4669  return AVERROR_INVALIDDATA;
4670 
4671  tag = avio_rl32(pb);
4672  if (tag != MKTAG('p','r','o','j')) {
4673  av_log(c->fc, AV_LOG_ERROR, "Missing projection box\n");
4674  return 0;
4675  }
4676 
4677  size = avio_rb32(pb);
4678  if (size > atom.size)
4679  return AVERROR_INVALIDDATA;
4680 
4681  tag = avio_rl32(pb);
4682  if (tag != MKTAG('p','r','h','d')) {
4683  av_log(c->fc, AV_LOG_ERROR, "Missing projection header box\n");
4684  return 0;
4685  }
4686  avio_skip(pb, 4); /* version + flags */
4687 
4688  /* 16.16 fixed point */
4689  yaw = avio_rb32(pb);
4690  pitch = avio_rb32(pb);
4691  roll = avio_rb32(pb);
4692 
4693  size = avio_rb32(pb);
4694  if (size > atom.size)
4695  return AVERROR_INVALIDDATA;
4696 
4697  tag = avio_rl32(pb);
4698  avio_skip(pb, 4); /* version + flags */
4699  switch (tag) {
4700  case MKTAG('c','b','m','p'):
4701  layout = avio_rb32(pb);
4702  if (layout) {
4703  av_log(c->fc, AV_LOG_WARNING,
4704  "Unsupported cubemap layout %d\n", layout);
4705  return 0;
4706  }
4707  projection = AV_SPHERICAL_CUBEMAP;