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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) {
411  key = c->meta_keys[index];
412  } else {
414  "The index of 'data' is out of range: %d >= %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 0x08%x 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  title_str = av_malloc(title_size + 1); /* Add null terminator */
746  if (!title_str)
747  return AVERROR(ENOMEM);
748 
749  ret = ffio_read_size(pb, title_str, title_size);
750  if (ret < 0) {
751  av_freep(&title_str);
752  return ret;
753  }
754  title_str[title_size] = 0;
755  if (title_str[0]) {
756  int off = (!c->isom && title_str[0] == title_size - 1);
757  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
758  }
759  av_freep(&title_str);
760  }
761 
762  return 0;
763 }
764 
766 {
767  AVStream *st;
768  int tag;
769 
770  if (fc->nb_streams < 1)
771  return 0;
772  st = fc->streams[fc->nb_streams-1];
773 
774  avio_rb32(pb); /* version + flags */
775  ff_mp4_read_descr(fc, pb, &tag);
776  if (tag == MP4ESDescrTag) {
778  } else
779  avio_rb16(pb); /* ID */
780 
781  ff_mp4_read_descr(fc, pb, &tag);
782  if (tag == MP4DecConfigDescrTag)
783  ff_mp4_read_dec_config_descr(fc, st, pb);
784  return 0;
785 }
786 
788 {
789  return ff_mov_read_esds(c->fc, pb);
790 }
791 
793 {
794  AVStream *st;
795  enum AVAudioServiceType *ast;
796  int ac3info, acmod, lfeon, bsmod;
797 
798  if (c->fc->nb_streams < 1)
799  return 0;
800  st = c->fc->streams[c->fc->nb_streams-1];
801 
803  sizeof(*ast));
804  if (!ast)
805  return AVERROR(ENOMEM);
806 
807  ac3info = avio_rb24(pb);
808  bsmod = (ac3info >> 14) & 0x7;
809  acmod = (ac3info >> 11) & 0x7;
810  lfeon = (ac3info >> 10) & 0x1;
811  st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
813  if (lfeon)
815  *ast = bsmod;
816  if (st->codecpar->channels > 1 && bsmod == 0x7)
818 
819 #if FF_API_LAVF_AVCTX
821  st->codec->audio_service_type = *ast;
823 #endif
824 
825  return 0;
826 }
827 
829 {
830  AVStream *st;
831  enum AVAudioServiceType *ast;
832  int eac3info, acmod, lfeon, bsmod;
833 
834  if (c->fc->nb_streams < 1)
835  return 0;
836  st = c->fc->streams[c->fc->nb_streams-1];
837 
839  sizeof(*ast));
840  if (!ast)
841  return AVERROR(ENOMEM);
842 
843  /* No need to parse fields for additional independent substreams and its
844  * associated dependent substreams since libavcodec's E-AC-3 decoder
845  * does not support them yet. */
846  avio_rb16(pb); /* data_rate and num_ind_sub */
847  eac3info = avio_rb24(pb);
848  bsmod = (eac3info >> 12) & 0x1f;
849  acmod = (eac3info >> 9) & 0x7;
850  lfeon = (eac3info >> 8) & 0x1;
852  if (lfeon)
855  *ast = bsmod;
856  if (st->codecpar->channels > 1 && bsmod == 0x7)
858 
859 #if FF_API_LAVF_AVCTX
861  st->codec->audio_service_type = *ast;
863 #endif
864 
865  return 0;
866 }
867 
869 {
870  const uint32_t ddts_size = 20;
871  AVStream *st = NULL;
872  uint8_t *buf = NULL;
873  uint32_t frame_duration_code = 0;
874  uint32_t channel_layout_code = 0;
875  GetBitContext gb;
876 
877  buf = av_malloc(ddts_size + FF_INPUT_BUFFER_PADDING_SIZE);
878  if (!buf) {
879  return AVERROR(ENOMEM);
880  }
881  if (avio_read(pb, buf, ddts_size) < ddts_size) {
882  av_free(buf);
883  return AVERROR_INVALIDDATA;
884  }
885 
886  init_get_bits(&gb, buf, 8*ddts_size);
887 
888  if (c->fc->nb_streams < 1) {
889  return 0;
890  }
891  st = c->fc->streams[c->fc->nb_streams-1];
892 
893  st->codecpar->sample_rate = get_bits_long(&gb, 32);
894  if (st->codecpar->sample_rate <= 0) {
895  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
896  return AVERROR_INVALIDDATA;
897  }
898  skip_bits_long(&gb, 32); /* max bitrate */
899  st->codecpar->bit_rate = get_bits_long(&gb, 32);
900  st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
901  frame_duration_code = get_bits(&gb, 2);
902  skip_bits(&gb, 30); /* various fields */
903  channel_layout_code = get_bits(&gb, 16);
904 
905  st->codecpar->frame_size =
906  (frame_duration_code == 0) ? 512 :
907  (frame_duration_code == 1) ? 1024 :
908  (frame_duration_code == 2) ? 2048 :
909  (frame_duration_code == 3) ? 4096 : 0;
910 
911  if (channel_layout_code > 0xff) {
912  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
913  }
914  st->codecpar->channel_layout =
915  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
916  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
917  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
918  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
919  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
920  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
921 
923 
924  return 0;
925 }
926 
928 {
929  AVStream *st;
930 
931  if (c->fc->nb_streams < 1)
932  return 0;
933  st = c->fc->streams[c->fc->nb_streams-1];
934 
935  if (atom.size < 16)
936  return 0;
937 
938  /* skip version and flags */
939  avio_skip(pb, 4);
940 
941  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
942 
943  return 0;
944 }
945 
947 {
948  AVStream *st;
949  int ret;
950 
951  if (c->fc->nb_streams < 1)
952  return 0;
953  st = c->fc->streams[c->fc->nb_streams-1];
954 
955  if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
956  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
957 
958  return ret;
959 }
960 
962 {
963  const int num = avio_rb32(pb);
964  const int den = avio_rb32(pb);
965  AVStream *st;
966 
967  if (c->fc->nb_streams < 1)
968  return 0;
969  st = c->fc->streams[c->fc->nb_streams-1];
970 
971  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
972  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
974  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
976  num, den);
977  } else if (den != 0) {
979  num, den, 32767);
980  }
981  return 0;
982 }
983 
984 /* this atom contains actual media data */
986 {
987  if (atom.size == 0) /* wrong one (MP4) */
988  return 0;
989  c->found_mdat=1;
990  return 0; /* now go for moov */
991 }
992 
993 #define DRM_BLOB_SIZE 56
994 
996 {
997  uint8_t intermediate_key[20];
998  uint8_t intermediate_iv[20];
999  uint8_t input[64];
1000  uint8_t output[64];
1001  uint8_t file_checksum[20];
1002  uint8_t calculated_checksum[20];
1003  struct AVSHA *sha;
1004  int i;
1005  int ret = 0;
1006  uint8_t *activation_bytes = c->activation_bytes;
1007  uint8_t *fixed_key = c->audible_fixed_key;
1008 
1009  c->aax_mode = 1;
1010 
1011  sha = av_sha_alloc();
1012  if (!sha)
1013  return AVERROR(ENOMEM);
1014  c->aes_decrypt = av_aes_alloc();
1015  if (!c->aes_decrypt) {
1016  ret = AVERROR(ENOMEM);
1017  goto fail;
1018  }
1019 
1020  /* drm blob processing */
1021  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
1022  avio_read(pb, input, DRM_BLOB_SIZE);
1023  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
1024  avio_read(pb, file_checksum, 20);
1025 
1026  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
1027  for (i = 0; i < 20; i++)
1028  av_log(c->fc, AV_LOG_INFO, "%02x", file_checksum[i]);
1029  av_log(c->fc, AV_LOG_INFO, "\n");
1030 
1031  /* verify activation data */
1032  if (!activation_bytes) {
1033  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
1034  ret = 0; /* allow ffprobe to continue working on .aax files */
1035  goto fail;
1036  }
1037  if (c->activation_bytes_size != 4) {
1038  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
1039  ret = AVERROR(EINVAL);
1040  goto fail;
1041  }
1042 
1043  /* verify fixed key */
1044  if (c->audible_fixed_key_size != 16) {
1045  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
1046  ret = AVERROR(EINVAL);
1047  goto fail;
1048  }
1049 
1050  /* AAX (and AAX+) key derivation */
1051  av_sha_init(sha, 160);
1052  av_sha_update(sha, fixed_key, 16);
1053  av_sha_update(sha, activation_bytes, 4);
1054  av_sha_final(sha, intermediate_key);
1055  av_sha_init(sha, 160);
1056  av_sha_update(sha, fixed_key, 16);
1057  av_sha_update(sha, intermediate_key, 20);
1058  av_sha_update(sha, activation_bytes, 4);
1059  av_sha_final(sha, intermediate_iv);
1060  av_sha_init(sha, 160);
1061  av_sha_update(sha, intermediate_key, 16);
1062  av_sha_update(sha, intermediate_iv, 16);
1063  av_sha_final(sha, calculated_checksum);
1064  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1065  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1066  ret = AVERROR_INVALIDDATA;
1067  goto fail;
1068  }
1069  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1070  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1071  for (i = 0; i < 4; i++) {
1072  // file data (in output) is stored in big-endian mode
1073  if (activation_bytes[i] != output[3 - i]) { // critical error
1074  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1075  ret = AVERROR_INVALIDDATA;
1076  goto fail;
1077  }
1078  }
1079  memcpy(c->file_key, output + 8, 16);
1080  memcpy(input, output + 26, 16);
1081  av_sha_init(sha, 160);
1082  av_sha_update(sha, input, 16);
1083  av_sha_update(sha, c->file_key, 16);
1084  av_sha_update(sha, fixed_key, 16);
1085  av_sha_final(sha, c->file_iv);
1086 
1087 fail:
1088  av_free(sha);
1089 
1090  return ret;
1091 }
1092 
1093 // Audible AAX (and AAX+) bytestream decryption
1094 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1095 {
1096  int blocks = 0;
1097  unsigned char iv[16];
1098 
1099  memcpy(iv, c->file_iv, 16); // iv is overwritten
1100  blocks = size >> 4; // trailing bytes are not encrypted!
1101  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1102  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1103 
1104  return 0;
1105 }
1106 
1107 /* read major brand, minor version and compatible brands and store them as metadata */
1109 {
1110  uint32_t minor_ver;
1111  int comp_brand_size;
1112  char* comp_brands_str;
1113  uint8_t type[5] = {0};
1114  int ret = ffio_read_size(pb, type, 4);
1115  if (ret < 0)
1116  return ret;
1117 
1118  if (strcmp(type, "qt "))
1119  c->isom = 1;
1120  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1121  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1122  minor_ver = avio_rb32(pb); /* minor version */
1123  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1124 
1125  comp_brand_size = atom.size - 8;
1126  if (comp_brand_size < 0)
1127  return AVERROR_INVALIDDATA;
1128  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1129  if (!comp_brands_str)
1130  return AVERROR(ENOMEM);
1131 
1132  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1133  if (ret < 0) {
1134  av_freep(&comp_brands_str);
1135  return ret;
1136  }
1137  comp_brands_str[comp_brand_size] = 0;
1138  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1139  av_freep(&comp_brands_str);
1140 
1141  return 0;
1142 }
1143 
1144 /* this atom should contain all header atoms */
1146 {
1147  int ret;
1148 
1149  if (c->found_moov) {
1150  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1151  avio_skip(pb, atom.size);
1152  return 0;
1153  }
1154 
1155  if ((ret = mov_read_default(c, pb, atom)) < 0)
1156  return ret;
1157  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1158  /* so we don't parse the whole file if over a network */
1159  c->found_moov=1;
1160  return 0; /* now go for mdat */
1161 }
1162 
1164 {
1165  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1166  c->has_looked_for_mfra = 1;
1167  if (pb->seekable) {
1168  int ret;
1169  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1170  "for a mfra\n");
1171  if ((ret = mov_read_mfra(c, pb)) < 0) {
1172  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1173  "read the mfra (may be a live ismv)\n");
1174  }
1175  } else {
1176  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1177  "seekable, can not look for mfra\n");
1178  }
1179  }
1181  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1182  return mov_read_default(c, pb, atom);
1183 }
1184 
1185 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1186 {
1187  if (time) {
1188  if(time >= 2082844800)
1189  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1190  avpriv_dict_set_timestamp(metadata, "creation_time", time * 1000000);
1191  }
1192 }
1193 
1195 {
1196  AVStream *st;
1197  MOVStreamContext *sc;
1198  int version;
1199  char language[4] = {0};
1200  unsigned lang;
1201  int64_t creation_time;
1202 
1203  if (c->fc->nb_streams < 1)
1204  return 0;
1205  st = c->fc->streams[c->fc->nb_streams-1];
1206  sc = st->priv_data;
1207 
1208  if (sc->time_scale) {
1209  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1210  return AVERROR_INVALIDDATA;
1211  }
1212 
1213  version = avio_r8(pb);
1214  if (version > 1) {
1215  avpriv_request_sample(c->fc, "Version %d", version);
1216  return AVERROR_PATCHWELCOME;
1217  }
1218  avio_rb24(pb); /* flags */
1219  if (version == 1) {
1220  creation_time = avio_rb64(pb);
1221  avio_rb64(pb);
1222  } else {
1223  creation_time = avio_rb32(pb);
1224  avio_rb32(pb); /* modification time */
1225  }
1226  mov_metadata_creation_time(&st->metadata, creation_time);
1227 
1228  sc->time_scale = avio_rb32(pb);
1229  if (sc->time_scale <= 0) {
1230  av_log(c->fc, AV_LOG_ERROR, "Invalid mdhd time scale %d\n", sc->time_scale);
1231  return AVERROR_INVALIDDATA;
1232  }
1233  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1234 
1235  lang = avio_rb16(pb); /* language */
1236  if (ff_mov_lang_to_iso639(lang, language))
1237  av_dict_set(&st->metadata, "language", language, 0);
1238  avio_rb16(pb); /* quality */
1239 
1240  return 0;
1241 }
1242 
1244 {
1245  int i;
1246  int64_t creation_time;
1247  int version = avio_r8(pb); /* version */
1248  avio_rb24(pb); /* flags */
1249 
1250  if (version == 1) {
1251  creation_time = avio_rb64(pb);
1252  avio_rb64(pb);
1253  } else {
1254  creation_time = avio_rb32(pb);
1255  avio_rb32(pb); /* modification time */
1256  }
1257  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1258  c->time_scale = avio_rb32(pb); /* time scale */
1259  if (c->time_scale <= 0) {
1260  av_log(c->fc, AV_LOG_ERROR, "Invalid mvhd time scale %d\n", c->time_scale);
1261  return AVERROR_INVALIDDATA;
1262  }
1263  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1264 
1265  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1266  // set the AVCodecContext duration because the duration of individual tracks
1267  // may be inaccurate
1268  if (c->time_scale > 0 && !c->trex_data)
1270  avio_rb32(pb); /* preferred scale */
1271 
1272  avio_rb16(pb); /* preferred volume */
1273 
1274  avio_skip(pb, 10); /* reserved */
1275 
1276  /* movie display matrix, store it in main context and use it later on */
1277  for (i = 0; i < 3; i++) {
1278  c->movie_display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
1279  c->movie_display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
1280  c->movie_display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
1281  }
1282 
1283  avio_rb32(pb); /* preview time */
1284  avio_rb32(pb); /* preview duration */
1285  avio_rb32(pb); /* poster time */
1286  avio_rb32(pb); /* selection time */
1287  avio_rb32(pb); /* selection duration */
1288  avio_rb32(pb); /* current time */
1289  avio_rb32(pb); /* next track ID */
1290 
1291  return 0;
1292 }
1293 
1295 {
1296  AVStream *st;
1297  int little_endian;
1298 
1299  if (c->fc->nb_streams < 1)
1300  return 0;
1301  st = c->fc->streams[c->fc->nb_streams-1];
1302 
1303  little_endian = avio_rb16(pb) & 0xFF;
1304  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1305  if (little_endian == 1) {
1306  switch (st->codecpar->codec_id) {
1307  case AV_CODEC_ID_PCM_S24BE:
1309  break;
1310  case AV_CODEC_ID_PCM_S32BE:
1312  break;
1313  case AV_CODEC_ID_PCM_F32BE:
1315  break;
1316  case AV_CODEC_ID_PCM_F64BE:
1318  break;
1319  default:
1320  break;
1321  }
1322  }
1323  return 0;
1324 }
1325 
1327 {
1328  AVStream *st;
1329  char color_parameter_type[5] = { 0 };
1330  uint16_t color_primaries, color_trc, color_matrix;
1331  int ret;
1332 
1333  if (c->fc->nb_streams < 1)
1334  return 0;
1335  st = c->fc->streams[c->fc->nb_streams - 1];
1336 
1337  ret = ffio_read_size(pb, color_parameter_type, 4);
1338  if (ret < 0)
1339  return ret;
1340  if (strncmp(color_parameter_type, "nclx", 4) &&
1341  strncmp(color_parameter_type, "nclc", 4)) {
1342  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1343  color_parameter_type);
1344  return 0;
1345  }
1346 
1347  color_primaries = avio_rb16(pb);
1348  color_trc = avio_rb16(pb);
1349  color_matrix = avio_rb16(pb);
1350 
1351  av_log(c->fc, AV_LOG_TRACE,
1352  "%s: pri %d trc %d matrix %d",
1353  color_parameter_type, color_primaries, color_trc, color_matrix);
1354 
1355  if (!strncmp(color_parameter_type, "nclx", 4)) {
1356  uint8_t color_range = avio_r8(pb) >> 7;
1357  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1358  if (color_range)
1360  else
1362  }
1363  if (color_primaries >= AVCOL_PRI_NB)
1364  color_primaries = AVCOL_PRI_UNSPECIFIED;
1365  if (color_trc >= AVCOL_TRC_NB)
1366  color_trc = AVCOL_TRC_UNSPECIFIED;
1367  if (color_matrix >= AVCOL_SPC_NB)
1368  color_matrix = AVCOL_SPC_UNSPECIFIED;
1370  st->codecpar->color_trc = color_trc;
1371  st->codecpar->color_space = color_matrix;
1372  av_log(c->fc, AV_LOG_TRACE, "\n");
1373 
1374  return 0;
1375 }
1376 
1378 {
1379  AVStream *st;
1380  unsigned mov_field_order;
1381  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1382 
1383  if (c->fc->nb_streams < 1) // will happen with jp2 files
1384  return 0;
1385  st = c->fc->streams[c->fc->nb_streams-1];
1386  if (atom.size < 2)
1387  return AVERROR_INVALIDDATA;
1388  mov_field_order = avio_rb16(pb);
1389  if ((mov_field_order & 0xFF00) == 0x0100)
1390  decoded_field_order = AV_FIELD_PROGRESSIVE;
1391  else if ((mov_field_order & 0xFF00) == 0x0200) {
1392  switch (mov_field_order & 0xFF) {
1393  case 0x01: decoded_field_order = AV_FIELD_TT;
1394  break;
1395  case 0x06: decoded_field_order = AV_FIELD_BB;
1396  break;
1397  case 0x09: decoded_field_order = AV_FIELD_TB;
1398  break;
1399  case 0x0E: decoded_field_order = AV_FIELD_BT;
1400  break;
1401  }
1402  }
1403  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1404  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1405  }
1406  st->codecpar->field_order = decoded_field_order;
1407 
1408  return 0;
1409 }
1410 
1412 {
1413  int err = 0;
1414  uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1415  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1416  return AVERROR_INVALIDDATA;
1417  if ((err = av_reallocp(&par->extradata, size)) < 0) {
1418  par->extradata_size = 0;
1419  return err;
1420  }
1422  return 0;
1423 }
1424 
1425 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1427  AVCodecParameters *par, uint8_t *buf)
1428 {
1429  int64_t result = atom.size;
1430  int err;
1431 
1432  AV_WB32(buf , atom.size + 8);
1433  AV_WL32(buf + 4, atom.type);
1434  err = ffio_read_size(pb, buf + 8, atom.size);
1435  if (err < 0) {
1436  par->extradata_size -= atom.size;
1437  return err;
1438  } else if (err < atom.size) {
1439  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1440  par->extradata_size -= atom.size - err;
1441  result = err;
1442  }
1443  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1444  return result;
1445 }
1446 
1447 /* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1449  enum AVCodecID codec_id)
1450 {
1451  AVStream *st;
1452  uint64_t original_size;
1453  int err;
1454 
1455  if (c->fc->nb_streams < 1) // will happen with jp2 files
1456  return 0;
1457  st = c->fc->streams[c->fc->nb_streams-1];
1458 
1459  if (st->codecpar->codec_id != codec_id)
1460  return 0; /* unexpected codec_id - don't mess with extradata */
1461 
1462  original_size = st->codecpar->extradata_size;
1463  err = mov_realloc_extradata(st->codecpar, atom);
1464  if (err)
1465  return err;
1466 
1467  err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1468  if (err < 0)
1469  return err;
1470  return 0; // Note: this is the original behavior to ignore truncation.
1471 }
1472 
1473 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1475 {
1476  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1477 }
1478 
1480 {
1481  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1482 }
1483 
1485 {
1486  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1487 }
1488 
1490 {
1491  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1492 }
1493 
1495 {
1496  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1497  if(ret == 0)
1498  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1499  return ret;
1500 }
1501 
1503 {
1504  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1505 
1506  if (!ret && c->fc->nb_streams >= 1) {
1507  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1508  if (par->extradata_size >= 40) {
1509  par->height = AV_RB16(&par->extradata[36]);
1510  par->width = AV_RB16(&par->extradata[38]);
1511  }
1512  }
1513  return ret;
1514 }
1515 
1517 {
1518  if (c->fc->nb_streams >= 1) {
1519  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1520  if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1521  par->codec_id == AV_CODEC_ID_H264 &&
1522  atom.size > 11) {
1523  int cid;
1524  avio_skip(pb, 10);
1525  cid = avio_rb16(pb);
1526  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1527  if (cid == 0xd4d || cid == 0xd4e)
1528  par->width = 1440;
1529  return 0;
1530  } else if ((par->codec_tag == MKTAG('A', 'V', 'd', '1') ||
1531  par->codec_tag == MKTAG('A', 'V', 'd', 'n')) &&
1532  atom.size >= 24) {
1533  int num, den;
1534  avio_skip(pb, 12);
1535  num = avio_rb32(pb);
1536  den = avio_rb32(pb);
1537  if (num <= 0 || den <= 0)
1538  return 0;
1539  switch (avio_rb32(pb)) {
1540  case 2:
1541  if (den >= INT_MAX / 2)
1542  return 0;
1543  den *= 2;
1544  case 1:
1545  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1546  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1547  default:
1548  return 0;
1549  }
1550  }
1551  }
1552 
1553  return mov_read_avid(c, pb, atom);
1554 }
1555 
1557 {
1558  int ret = 0;
1559  int length = 0;
1560  uint64_t original_size;
1561  if (c->fc->nb_streams >= 1) {
1562  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1563  if (par->codec_id == AV_CODEC_ID_H264)
1564  return 0;
1565  if (atom.size == 16) {
1566  original_size = par->extradata_size;
1567  ret = mov_realloc_extradata(par, atom);
1568  if (!ret) {
1569  length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1570  if (length == atom.size) {
1571  const uint8_t range_value = par->extradata[original_size + 19];
1572  switch (range_value) {
1573  case 1:
1575  break;
1576  case 2:
1578  break;
1579  default:
1580  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1581  break;
1582  }
1583  ff_dlog(c, "color_range: %d\n", par->color_range);
1584  } else {
1585  /* For some reason the whole atom was not added to the extradata */
1586  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1587  }
1588  } else {
1589  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1590  }
1591  } else {
1592  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1593  }
1594  }
1595 
1596  return ret;
1597 }
1598 
1600 {
1601  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1602 }
1603 
1605 {
1606  AVStream *st;
1607  int ret;
1608 
1609  if (c->fc->nb_streams < 1)
1610  return 0;
1611  st = c->fc->streams[c->fc->nb_streams-1];
1612 
1613  if ((uint64_t)atom.size > (1<<30))
1614  return AVERROR_INVALIDDATA;
1615 
1616  if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1619  // pass all frma atom to codec, needed at least for QDMC and QDM2
1620  av_freep(&st->codecpar->extradata);
1621  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1622  if (ret < 0)
1623  return ret;
1624  } else if (atom.size > 8) { /* to read frma, esds atoms */
1625  if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1626  uint64_t buffer;
1627  ret = ffio_ensure_seekback(pb, 8);
1628  if (ret < 0)
1629  return ret;
1630  buffer = avio_rb64(pb);
1631  atom.size -= 8;
1632  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1633  && buffer >> 32 <= atom.size
1634  && buffer >> 32 >= 8) {
1635  avio_skip(pb, -8);
1636  atom.size += 8;
1637  } else if (!st->codecpar->extradata_size) {
1638 #define ALAC_EXTRADATA_SIZE 36
1640  if (!st->codecpar->extradata)
1641  return AVERROR(ENOMEM);
1644  AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1645  AV_WB64(st->codecpar->extradata + 12, buffer);
1646  avio_read(pb, st->codecpar->extradata + 20, 16);
1647  avio_skip(pb, atom.size - 24);
1648  return 0;
1649  }
1650  }
1651  if ((ret = mov_read_default(c, pb, atom)) < 0)
1652  return ret;
1653  } else
1654  avio_skip(pb, atom.size);
1655  return 0;
1656 }
1657 
1658 /**
1659  * This function reads atom content and puts data in extradata without tag
1660  * nor size unlike mov_read_extradata.
1661  */
1663 {
1664  AVStream *st;
1665  int ret;
1666 
1667  if (c->fc->nb_streams < 1)
1668  return 0;
1669  st = c->fc->streams[c->fc->nb_streams-1];
1670 
1671  if ((uint64_t)atom.size > (1<<30))
1672  return AVERROR_INVALIDDATA;
1673 
1674  if (atom.size >= 10) {
1675  // Broken files created by legacy versions of libavformat will
1676  // wrap a whole fiel atom inside of a glbl atom.
1677  unsigned size = avio_rb32(pb);
1678  unsigned type = avio_rl32(pb);
1679  avio_seek(pb, -8, SEEK_CUR);
1680  if (type == MKTAG('f','i','e','l') && size == atom.size)
1681  return mov_read_default(c, pb, atom);
1682  }
1683  if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1684  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1685  return 0;
1686  }
1687  av_freep(&st->codecpar->extradata);
1688  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1689  if (ret < 0)
1690  return ret;
1691 
1692  return 0;
1693 }
1694 
1696 {
1697  AVStream *st;
1698  uint8_t profile_level;
1699  int ret;
1700 
1701  if (c->fc->nb_streams < 1)
1702  return 0;
1703  st = c->fc->streams[c->fc->nb_streams-1];
1704 
1705  if (atom.size >= (1<<28) || atom.size < 7)
1706  return AVERROR_INVALIDDATA;
1707 
1708  profile_level = avio_r8(pb);
1709  if ((profile_level & 0xf0) != 0xc0)
1710  return 0;
1711 
1712  avio_seek(pb, 6, SEEK_CUR);
1713  av_freep(&st->codecpar->extradata);
1714  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1715  if (ret < 0)
1716  return ret;
1717 
1718  return 0;
1719 }
1720 
1721 /**
1722  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1723  * but can have extradata appended at the end after the 40 bytes belonging
1724  * to the struct.
1725  */
1727 {
1728  AVStream *st;
1729  int ret;
1730 
1731  if (c->fc->nb_streams < 1)
1732  return 0;
1733  if (atom.size <= 40)
1734  return 0;
1735  st = c->fc->streams[c->fc->nb_streams-1];
1736 
1737  if ((uint64_t)atom.size > (1<<30))
1738  return AVERROR_INVALIDDATA;
1739 
1740  avio_skip(pb, 40);
1741  av_freep(&st->codecpar->extradata);
1742  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1743  if (ret < 0)
1744  return ret;
1745 
1746  return 0;
1747 }
1748 
1750 {
1751  AVStream *st;
1752  MOVStreamContext *sc;
1753  unsigned int i, entries;
1754 
1755  if (c->fc->nb_streams < 1)
1756  return 0;
1757  st = c->fc->streams[c->fc->nb_streams-1];
1758  sc = st->priv_data;
1759 
1760  avio_r8(pb); /* version */
1761  avio_rb24(pb); /* flags */
1762 
1763  entries = avio_rb32(pb);
1764 
1765  if (!entries)
1766  return 0;
1767 
1768  if (sc->chunk_offsets)
1769  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1770  av_free(sc->chunk_offsets);
1771  sc->chunk_count = 0;
1772  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1773  if (!sc->chunk_offsets)
1774  return AVERROR(ENOMEM);
1775  sc->chunk_count = entries;
1776 
1777  if (atom.type == MKTAG('s','t','c','o'))
1778  for (i = 0; i < entries && !pb->eof_reached; i++)
1779  sc->chunk_offsets[i] = avio_rb32(pb);
1780  else if (atom.type == MKTAG('c','o','6','4'))
1781  for (i = 0; i < entries && !pb->eof_reached; i++)
1782  sc->chunk_offsets[i] = avio_rb64(pb);
1783  else
1784  return AVERROR_INVALIDDATA;
1785 
1786  sc->chunk_count = i;
1787 
1788  if (pb->eof_reached)
1789  return AVERROR_EOF;
1790 
1791  return 0;
1792 }
1793 
1794 /**
1795  * Compute codec id for 'lpcm' tag.
1796  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1797  */
1799 {
1800  /* lpcm flags:
1801  * 0x1 = float
1802  * 0x2 = big-endian
1803  * 0x4 = signed
1804  */
1805  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1806 }
1807 
1808 static int mov_codec_id(AVStream *st, uint32_t format)
1809 {
1810  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1811 
1812  if (id <= 0 &&
1813  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1814  (format & 0xFFFF) == 'T' + ('S' << 8)))
1815  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1816 
1817  if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1819  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1820  /* skip old ASF MPEG-4 tag */
1821  format && format != MKTAG('m','p','4','s')) {
1823  if (id <= 0)
1824  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1825  if (id > 0)
1827  else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
1829  st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
1831  if (id > 0)
1833  }
1834  }
1835 
1836  st->codecpar->codec_tag = format;
1837 
1838  return id;
1839 }
1840 
1842  AVStream *st, MOVStreamContext *sc)
1843 {
1844  uint8_t codec_name[32] = { 0 };
1845  int64_t stsd_start;
1846  unsigned int len;
1847 
1848  /* The first 16 bytes of the video sample description are already
1849  * read in ff_mov_read_stsd_entries() */
1850  stsd_start = avio_tell(pb) - 16;
1851 
1852  avio_rb16(pb); /* version */
1853  avio_rb16(pb); /* revision level */
1854  avio_rb32(pb); /* vendor */
1855  avio_rb32(pb); /* temporal quality */
1856  avio_rb32(pb); /* spatial quality */
1857 
1858  st->codecpar->width = avio_rb16(pb); /* width */
1859  st->codecpar->height = avio_rb16(pb); /* height */
1860 
1861  avio_rb32(pb); /* horiz resolution */
1862  avio_rb32(pb); /* vert resolution */
1863  avio_rb32(pb); /* data size, always 0 */
1864  avio_rb16(pb); /* frames per samples */
1865 
1866  len = avio_r8(pb); /* codec name, pascal string */
1867  if (len > 31)
1868  len = 31;
1869  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1870  if (len < 31)
1871  avio_skip(pb, 31 - len);
1872 
1873  if (codec_name[0])
1874  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1875 
1876  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1877  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1878  st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1879  st->codecpar->width &= ~1;
1880  st->codecpar->height &= ~1;
1881  }
1882  /* Flash Media Server uses tag H.263 with Sorenson Spark */
1883  if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1884  !memcmp(codec_name, "Sorenson H263", 13))
1886 
1887  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1888 
1889  avio_seek(pb, stsd_start, SEEK_SET);
1890 
1891  if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
1892  st->codecpar->bits_per_coded_sample &= 0x1F;
1893  sc->has_palette = 1;
1894  }
1895 }
1896 
1898  AVStream *st, MOVStreamContext *sc)
1899 {
1900  int bits_per_sample, flags;
1901  uint16_t version = avio_rb16(pb);
1902  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1903 
1904  avio_rb16(pb); /* revision level */
1905  avio_rb32(pb); /* vendor */
1906 
1907  st->codecpar->channels = avio_rb16(pb); /* channel count */
1908  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1909  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1910 
1911  sc->audio_cid = avio_rb16(pb);
1912  avio_rb16(pb); /* packet size = 0 */
1913 
1914  st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1915 
1916  // Read QT version 1 fields. In version 0 these do not exist.
1917  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1918  if (!c->isom ||
1919  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1920 
1921  if (version == 1) {
1922  sc->samples_per_frame = avio_rb32(pb);
1923  avio_rb32(pb); /* bytes per packet */
1924  sc->bytes_per_frame = avio_rb32(pb);
1925  avio_rb32(pb); /* bytes per sample */
1926  } else if (version == 2) {
1927  avio_rb32(pb); /* sizeof struct only */
1929  st->codecpar->channels = avio_rb32(pb);
1930  avio_rb32(pb); /* always 0x7F000000 */
1932 
1933  flags = avio_rb32(pb); /* lpcm format specific flag */
1934  sc->bytes_per_frame = avio_rb32(pb);
1935  sc->samples_per_frame = avio_rb32(pb);
1936  if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1937  st->codecpar->codec_id =
1939  flags);
1940  }
1941  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1942  /* can't correctly handle variable sized packet as audio unit */
1943  switch (st->codecpar->codec_id) {
1944  case AV_CODEC_ID_MP2:
1945  case AV_CODEC_ID_MP3:
1947  break;
1948  }
1949  }
1950  }
1951 
1952  if (sc->format == 0) {
1953  if (st->codecpar->bits_per_coded_sample == 8)
1954  st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1955  else if (st->codecpar->bits_per_coded_sample == 16)
1956  st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1957  }
1958 
1959  switch (st->codecpar->codec_id) {
1960  case AV_CODEC_ID_PCM_S8:
1961  case AV_CODEC_ID_PCM_U8:
1962  if (st->codecpar->bits_per_coded_sample == 16)
1964  break;
1965  case AV_CODEC_ID_PCM_S16LE:
1966  case AV_CODEC_ID_PCM_S16BE:
1967  if (st->codecpar->bits_per_coded_sample == 8)
1969  else if (st->codecpar->bits_per_coded_sample == 24)
1970  st->codecpar->codec_id =
1973  else if (st->codecpar->bits_per_coded_sample == 32)
1974  st->codecpar->codec_id =
1977  break;
1978  /* set values for old format before stsd version 1 appeared */
1979  case AV_CODEC_ID_MACE3:
1980  sc->samples_per_frame = 6;
1981  sc->bytes_per_frame = 2 * st->codecpar->channels;
1982  break;
1983  case AV_CODEC_ID_MACE6:
1984  sc->samples_per_frame = 6;
1985  sc->bytes_per_frame = 1 * st->codecpar->channels;
1986  break;
1988  sc->samples_per_frame = 64;
1989  sc->bytes_per_frame = 34 * st->codecpar->channels;
1990  break;
1991  case AV_CODEC_ID_GSM:
1992  sc->samples_per_frame = 160;
1993  sc->bytes_per_frame = 33;
1994  break;
1995  default:
1996  break;
1997  }
1998 
1999  bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2000  if (bits_per_sample) {
2001  st->codecpar->bits_per_coded_sample = bits_per_sample;
2002  sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
2003  }
2004 }
2005 
2007  AVStream *st, MOVStreamContext *sc,
2008  int64_t size)
2009 {
2010  // ttxt stsd contains display flags, justification, background
2011  // color, fonts, and default styles, so fake an atom to read it
2012  MOVAtom fake_atom = { .size = size };
2013  // mp4s contains a regular esds atom
2014  if (st->codecpar->codec_tag != AV_RL32("mp4s"))
2015  mov_read_glbl(c, pb, fake_atom);
2016  st->codecpar->width = sc->width;
2017  st->codecpar->height = sc->height;
2018 }
2019 
2020 static uint32_t yuv_to_rgba(uint32_t ycbcr)
2021 {
2022  uint8_t r, g, b;
2023  int y, cb, cr;
2024 
2025  y = (ycbcr >> 16) & 0xFF;
2026  cr = (ycbcr >> 8) & 0xFF;
2027  cb = ycbcr & 0xFF;
2028 
2029  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
2030  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
2031  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
2032 
2033  return (r << 16) | (g << 8) | b;
2034 }
2035 
2037 {
2038  char buf[256] = {0};
2039  uint8_t *src = st->codecpar->extradata;
2040  int i;
2041 
2042  if (st->codecpar->extradata_size != 64)
2043  return 0;
2044 
2045  if (st->codecpar->width > 0 && st->codecpar->height > 0)
2046  snprintf(buf, sizeof(buf), "size: %dx%d\n",
2047  st->codecpar->width, st->codecpar->height);
2048  av_strlcat(buf, "palette: ", sizeof(buf));
2049 
2050  for (i = 0; i < 16; i++) {
2051  uint32_t yuv = AV_RB32(src + i * 4);
2052  uint32_t rgba = yuv_to_rgba(yuv);
2053 
2054  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2055  }
2056 
2057  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2058  return 0;
2059 
2060  av_freep(&st->codecpar->extradata);
2061  st->codecpar->extradata_size = 0;
2063  if (!st->codecpar->extradata)
2064  return AVERROR(ENOMEM);
2065  st->codecpar->extradata_size = strlen(buf);
2066  memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2067 
2068  return 0;
2069 }
2070 
2072  AVStream *st, MOVStreamContext *sc,
2073  int64_t size)
2074 {
2075  int ret;
2076 
2077  if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2078  if ((int)size != size)
2079  return AVERROR(ENOMEM);
2080 
2081  ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2082  if (ret < 0)
2083  return ret;
2084  if (size > 16) {
2085  MOVStreamContext *tmcd_ctx = st->priv_data;
2086  int val;
2087  val = AV_RB32(st->codecpar->extradata + 4);
2088  tmcd_ctx->tmcd_flags = val;
2089  st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2090  st->avg_frame_rate.den = 1;
2091 #if FF_API_LAVF_AVCTX
2093  st->codec->time_base = av_inv_q(st->avg_frame_rate);
2095 #endif
2096  /* adjust for per frame dur in counter mode */
2097  if (tmcd_ctx->tmcd_flags & 0x0008) {
2098  int timescale = AV_RB32(st->codecpar->extradata + 8);
2099  int framedur = AV_RB32(st->codecpar->extradata + 12);
2100  st->avg_frame_rate.num *= timescale;
2101  st->avg_frame_rate.den *= framedur;
2102 #if FF_API_LAVF_AVCTX
2104  st->codec->time_base.den *= timescale;
2105  st->codec->time_base.num *= framedur;
2107 #endif
2108  }
2109  if (size > 30) {
2110  uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2111  uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2112  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2113  uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2114  if (str_size > 0 && size >= (int)str_size + 26) {
2115  char *reel_name = av_malloc(str_size + 1);
2116  if (!reel_name)
2117  return AVERROR(ENOMEM);
2118  memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2119  reel_name[str_size] = 0; /* Add null terminator */
2120  /* don't add reel_name if emtpy string */
2121  if (*reel_name == 0) {
2122  av_free(reel_name);
2123  } else {
2124  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2125  }
2126  }
2127  }
2128  }
2129  }
2130  } else {
2131  /* other codec type, just skip (rtp, mp4s ...) */
2132  avio_skip(pb, size);
2133  }
2134  return 0;
2135 }
2136 
2138  AVStream *st, MOVStreamContext *sc)
2139 {
2140  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2141  !st->codecpar->sample_rate && sc->time_scale > 1)
2142  st->codecpar->sample_rate = sc->time_scale;
2143 
2144  /* special codec parameters handling */
2145  switch (st->codecpar->codec_id) {
2146 #if CONFIG_DV_DEMUXER
2147  case AV_CODEC_ID_DVAUDIO:
2149  if (!c->dv_fctx) {
2150  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2151  return AVERROR(ENOMEM);
2152  }
2154  if (!c->dv_demux) {
2155  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2156  return AVERROR(ENOMEM);
2157  }
2158  sc->dv_audio_container = 1;
2160  break;
2161 #endif
2162  /* no ifdef since parameters are always those */
2163  case AV_CODEC_ID_QCELP:
2164  st->codecpar->channels = 1;
2165  // force sample rate for qcelp when not stored in mov
2166  if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2167  st->codecpar->sample_rate = 8000;
2168  // FIXME: Why is the following needed for some files?
2169  sc->samples_per_frame = 160;
2170  if (!sc->bytes_per_frame)
2171  sc->bytes_per_frame = 35;
2172  break;
2173  case AV_CODEC_ID_AMR_NB:
2174  st->codecpar->channels = 1;
2175  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2176  st->codecpar->sample_rate = 8000;
2177  break;
2178  case AV_CODEC_ID_AMR_WB:
2179  st->codecpar->channels = 1;
2180  st->codecpar->sample_rate = 16000;
2181  break;
2182  case AV_CODEC_ID_MP2:
2183  case AV_CODEC_ID_MP3:
2184  /* force type after stsd for m1a hdlr */
2186  break;
2187  case AV_CODEC_ID_GSM:
2188  case AV_CODEC_ID_ADPCM_MS:
2190  case AV_CODEC_ID_ILBC:
2191  case AV_CODEC_ID_MACE3:
2192  case AV_CODEC_ID_MACE6:
2193  case AV_CODEC_ID_QDM2:
2195  break;
2196  case AV_CODEC_ID_ALAC:
2197  if (st->codecpar->extradata_size == 36) {
2198  st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2199  st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2200  }
2201  break;
2202  case AV_CODEC_ID_AC3:
2203  case AV_CODEC_ID_EAC3:
2205  case AV_CODEC_ID_VC1:
2206  case AV_CODEC_ID_VP9:
2208  break;
2209  default:
2210  break;
2211  }
2212  return 0;
2213 }
2214 
2216  int codec_tag, int format,
2217  int64_t size)
2218 {
2219  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2220 
2221  if (codec_tag &&
2222  (codec_tag != format &&
2223  // AVID 1:1 samples with differing data format and codec tag exist
2224  (codec_tag != AV_RL32("AV1x") || format != AV_RL32("AVup")) &&
2225  // prores is allowed to have differing data format and codec tag
2226  codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
2227  // so is dv (sigh)
2228  codec_tag != AV_RL32("dvpp") && codec_tag != AV_RL32("dvcp") &&
2229  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2230  : codec_tag != MKTAG('j','p','e','g')))) {
2231  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2232  * export it as a separate AVStream but this needs a few changes
2233  * in the MOV demuxer, patch welcome. */
2234 
2235  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2236  avio_skip(pb, size);
2237  return 1;
2238  }
2239 
2240  return 0;
2241 }
2242 
2244 {
2245  AVStream *st;
2246  MOVStreamContext *sc;
2247  int pseudo_stream_id;
2248 
2249  if (c->fc->nb_streams < 1)
2250  return 0;
2251  st = c->fc->streams[c->fc->nb_streams-1];
2252  sc = st->priv_data;
2253 
2254  for (pseudo_stream_id = 0;
2255  pseudo_stream_id < entries && !pb->eof_reached;
2256  pseudo_stream_id++) {
2257  //Parsing Sample description table
2258  enum AVCodecID id;
2259  int ret, dref_id = 1;
2260  MOVAtom a = { AV_RL32("stsd") };
2261  int64_t start_pos = avio_tell(pb);
2262  int64_t size = avio_rb32(pb); /* size */
2263  uint32_t format = avio_rl32(pb); /* data format */
2264 
2265  if (size >= 16) {
2266  avio_rb32(pb); /* reserved */
2267  avio_rb16(pb); /* reserved */
2268  dref_id = avio_rb16(pb);
2269  } else if (size <= 7) {
2270  av_log(c->fc, AV_LOG_ERROR,
2271  "invalid size %"PRId64" in stsd\n", size);
2272  return AVERROR_INVALIDDATA;
2273  }
2274 
2275  if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2276  size - (avio_tell(pb) - start_pos)))
2277  continue;
2278 
2279  sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2280  sc->dref_id= dref_id;
2281  sc->format = format;
2282 
2283  id = mov_codec_id(st, format);
2284 
2285  av_log(c->fc, AV_LOG_TRACE,
2286  "size=%"PRId64" 4CC= %c%c%c%c/0x%08x codec_type=%d\n", size,
2287  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
2288  (format >> 24) & 0xff, format, st->codecpar->codec_type);
2289 
2291  st->codecpar->codec_id = id;
2292  mov_parse_stsd_video(c, pb, st, sc);
2293  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2294  st->codecpar->codec_id = id;
2295  mov_parse_stsd_audio(c, pb, st, sc);
2296  if (st->codecpar->sample_rate < 0) {
2297  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
2298  return AVERROR_INVALIDDATA;
2299  }
2300  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2301  st->codecpar->codec_id = id;
2302  mov_parse_stsd_subtitle(c, pb, st, sc,
2303  size - (avio_tell(pb) - start_pos));
2304  } else {
2305  ret = mov_parse_stsd_data(c, pb, st, sc,
2306  size - (avio_tell(pb) - start_pos));
2307  if (ret < 0)
2308  return ret;
2309  }
2310  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2311  a.size = size - (avio_tell(pb) - start_pos);
2312  if (a.size > 8) {
2313  if ((ret = mov_read_default(c, pb, a)) < 0)
2314  return ret;
2315  } else if (a.size > 0)
2316  avio_skip(pb, a.size);
2317 
2318  if (sc->extradata) {
2319  int extra_size = st->codecpar->extradata_size;
2320 
2321  /* Move the current stream extradata to the stream context one. */
2322  sc->extradata_size[pseudo_stream_id] = extra_size;
2323  sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
2324  if (!sc->extradata[pseudo_stream_id])
2325  return AVERROR(ENOMEM);
2326  memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
2327  av_freep(&st->codecpar->extradata);
2328  st->codecpar->extradata_size = 0;
2329  }
2330  }
2331 
2332  if (pb->eof_reached)
2333  return AVERROR_EOF;
2334 
2335  return 0;
2336 }
2337 
2339 {
2340  AVStream *st;
2341  MOVStreamContext *sc;
2342  int ret, entries;
2343 
2344  if (c->fc->nb_streams < 1)
2345  return 0;
2346  st = c->fc->streams[c->fc->nb_streams - 1];
2347  sc = st->priv_data;
2348 
2349  avio_r8(pb); /* version */
2350  avio_rb24(pb); /* flags */
2351  entries = avio_rb32(pb);
2352 
2353  if (entries <= 0) {
2354  av_log(c->fc, AV_LOG_ERROR, "invalid STSD entries %d\n", entries);
2355  return AVERROR_INVALIDDATA;
2356  }
2357 
2358  if (sc->extradata) {
2359  av_log(c->fc, AV_LOG_ERROR, "Duplicate STSD\n");
2360  return AVERROR_INVALIDDATA;
2361  }
2362  /* Prepare space for hosting multiple extradata. */
2363  sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
2364  sc->extradata_size = av_mallocz_array(entries, sizeof(*sc->extradata_size));
2365  if (!sc->extradata_size || !sc->extradata) {
2366  ret = AVERROR(ENOMEM);
2367  goto fail;
2368  }
2369 
2370  ret = ff_mov_read_stsd_entries(c, pb, entries);
2371  if (ret < 0)
2372  return ret;
2373 
2374  sc->stsd_count = entries;
2375 
2376  /* Restore back the primary extradata. */
2377  av_freep(&st->codecpar->extradata);
2378  st->codecpar->extradata_size = sc->extradata_size[0];
2379  if (sc->extradata_size[0]) {
2381  if (!st->codecpar->extradata)
2382  return AVERROR(ENOMEM);
2383  memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
2384  }
2385 
2386  return mov_finalize_stsd_codec(c, pb, st, sc);
2387 fail:
2388  av_freep(&sc->extradata);
2389  av_freep(&sc->extradata_size);
2390  return ret;
2391 }
2392 
2394 {
2395  AVStream *st;
2396  MOVStreamContext *sc;
2397  unsigned int i, entries;
2398 
2399  if (c->fc->nb_streams < 1)
2400  return 0;
2401  st = c->fc->streams[c->fc->nb_streams-1];
2402  sc = st->priv_data;
2403 
2404  avio_r8(pb); /* version */
2405  avio_rb24(pb); /* flags */
2406 
2407  entries = avio_rb32(pb);
2408 
2409  av_log(c->fc, AV_LOG_TRACE, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
2410 
2411  if (!entries)
2412  return 0;
2413  if (sc->stsc_data)
2414  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2415  av_free(sc->stsc_data);
2416  sc->stsc_count = 0;
2417  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2418  if (!sc->stsc_data)
2419  return AVERROR(ENOMEM);
2420 
2421  for (i = 0; i < entries && !pb->eof_reached; i++) {
2422  sc->stsc_data[i].first = avio_rb32(pb);
2423  sc->stsc_data[i].count = avio_rb32(pb);
2424  sc->stsc_data[i].id = avio_rb32(pb);
2425  }
2426 
2427  sc->stsc_count = i;
2428 
2429  if (pb->eof_reached)
2430  return AVERROR_EOF;
2431 
2432  return 0;
2433 }
2434 
2435 /* Compute the samples value for the stsc entry at the given index. */
2436 static inline int mov_get_stsc_samples(MOVStreamContext *sc, int index)
2437 {
2438  int chunk_count;
2439 
2440  if (index < sc->stsc_count - 1)
2441  chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2442  else
2443  chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2444 
2445  return sc->stsc_data[index].count * chunk_count;
2446 }
2447 
2449 {
2450  AVStream *st;
2451  MOVStreamContext *sc;
2452  unsigned i, entries;
2453 
2454  if (c->fc->nb_streams < 1)
2455  return 0;
2456  st = c->fc->streams[c->fc->nb_streams-1];
2457  sc = st->priv_data;
2458 
2459  avio_rb32(pb); // version + flags
2460 
2461  entries = avio_rb32(pb);
2462  if (sc->stps_data)
2463  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2464  av_free(sc->stps_data);
2465  sc->stps_count = 0;
2466  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2467  if (!sc->stps_data)
2468  return AVERROR(ENOMEM);
2469 
2470  for (i = 0; i < entries && !pb->eof_reached; i++) {
2471  sc->stps_data[i] = avio_rb32(pb);
2472  //av_log(c->fc, AV_LOG_TRACE, "stps %d\n", sc->stps_data[i]);
2473  }
2474 
2475  sc->stps_count = i;
2476 
2477  if (pb->eof_reached)
2478  return AVERROR_EOF;
2479 
2480  return 0;
2481 }
2482 
2484 {
2485  AVStream *st;
2486  MOVStreamContext *sc;
2487  unsigned int i, entries;
2488 
2489  if (c->fc->nb_streams < 1)
2490  return 0;
2491  st = c->fc->streams[c->fc->nb_streams-1];
2492  sc = st->priv_data;
2493 
2494  avio_r8(pb); /* version */
2495  avio_rb24(pb); /* flags */
2496 
2497  entries = avio_rb32(pb);
2498 
2499  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %d\n", entries);
2500 
2501  if (!entries)
2502  {
2503  sc->keyframe_absent = 1;
2504  if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2506  return 0;
2507  }
2508  if (sc->keyframes)
2509  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2510  if (entries >= UINT_MAX / sizeof(int))
2511  return AVERROR_INVALIDDATA;
2512  av_freep(&sc->keyframes);
2513  sc->keyframe_count = 0;
2514  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2515  if (!sc->keyframes)
2516  return AVERROR(ENOMEM);
2517 
2518  for (i = 0; i < entries && !pb->eof_reached; i++) {
2519  sc->keyframes[i] = avio_rb32(pb);
2520  //av_log(c->fc, AV_LOG_TRACE, "keyframes[]=%d\n", sc->keyframes[i]);
2521  }
2522 
2523  sc->keyframe_count = i;
2524 
2525  if (pb->eof_reached)
2526  return AVERROR_EOF;
2527 
2528  return 0;
2529 }
2530 
2532 {
2533  AVStream *st;
2534  MOVStreamContext *sc;
2535  unsigned int i, entries, sample_size, field_size, num_bytes;
2536  GetBitContext gb;
2537  unsigned char* buf;
2538  int ret;
2539 
2540  if (c->fc->nb_streams < 1)
2541  return 0;
2542  st = c->fc->streams[c->fc->nb_streams-1];
2543  sc = st->priv_data;
2544 
2545  avio_r8(pb); /* version */
2546  avio_rb24(pb); /* flags */
2547 
2548  if (atom.type == MKTAG('s','t','s','z')) {
2549  sample_size = avio_rb32(pb);
2550  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2551  sc->sample_size = sample_size;
2552  sc->stsz_sample_size = sample_size;
2553  field_size = 32;
2554  } else {
2555  sample_size = 0;
2556  avio_rb24(pb); /* reserved */
2557  field_size = avio_r8(pb);
2558  }
2559  entries = avio_rb32(pb);
2560 
2561  av_log(c->fc, AV_LOG_TRACE, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2562 
2563  sc->sample_count = entries;
2564  if (sample_size)
2565  return 0;
2566 
2567  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2568  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2569  return AVERROR_INVALIDDATA;
2570  }
2571 
2572  if (!entries)
2573  return 0;
2574  if (entries >= (UINT_MAX - 4) / field_size)
2575  return AVERROR_INVALIDDATA;
2576  if (sc->sample_sizes)
2577  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2578  av_free(sc->sample_sizes);
2579  sc->sample_count = 0;
2580  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2581  if (!sc->sample_sizes)
2582  return AVERROR(ENOMEM);
2583 
2584  num_bytes = (entries*field_size+4)>>3;
2585 
2586  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2587  if (!buf) {
2588  av_freep(&sc->sample_sizes);
2589  return AVERROR(ENOMEM);
2590  }
2591 
2592  ret = ffio_read_size(pb, buf, num_bytes);
2593  if (ret < 0) {
2594  av_freep(&sc->sample_sizes);
2595  av_free(buf);
2596  return ret;
2597  }
2598 
2599  init_get_bits(&gb, buf, 8*num_bytes);
2600 
2601  for (i = 0; i < entries && !pb->eof_reached; i++) {
2602  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2603  sc->data_size += sc->sample_sizes[i];
2604  }
2605 
2606  sc->sample_count = i;
2607 
2608  av_free(buf);
2609 
2610  if (pb->eof_reached)
2611  return AVERROR_EOF;
2612 
2613  return 0;
2614 }
2615 
2617 {
2618  AVStream *st;
2619  MOVStreamContext *sc;
2620  unsigned int i, entries;
2621  int64_t duration=0;
2622  int64_t total_sample_count=0;
2623 
2624  if (c->fc->nb_streams < 1)
2625  return 0;
2626  st = c->fc->streams[c->fc->nb_streams-1];
2627  sc = st->priv_data;
2628 
2629  avio_r8(pb); /* version */
2630  avio_rb24(pb); /* flags */
2631  entries = avio_rb32(pb);
2632 
2633  av_log(c->fc, AV_LOG_TRACE, "track[%i].stts.entries = %i\n",
2634  c->fc->nb_streams-1, entries);
2635 
2636  if (sc->stts_data)
2637  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2638  av_free(sc->stts_data);
2639  sc->stts_count = 0;
2640  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2641  if (!sc->stts_data)
2642  return AVERROR(ENOMEM);
2643 
2644  for (i = 0; i < entries && !pb->eof_reached; i++) {
2645  int sample_duration;
2646  int sample_count;
2647 
2648  sample_count=avio_rb32(pb);
2649  sample_duration = avio_rb32(pb);
2650 
2651  if (sample_count < 0) {
2652  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2653  return AVERROR_INVALIDDATA;
2654  }
2655  sc->stts_data[i].count= sample_count;
2656  sc->stts_data[i].duration= sample_duration;
2657 
2658  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2659  sample_count, sample_duration);
2660 
2661  if ( i+1 == entries
2662  && i
2663  && sample_count == 1
2664  && total_sample_count > 100
2665  && sample_duration/10 > duration / total_sample_count)
2666  sample_duration = duration / total_sample_count;
2667  duration+=(int64_t)sample_duration*sample_count;
2668  total_sample_count+=sample_count;
2669  }
2670 
2671  sc->stts_count = i;
2672 
2673  sc->duration_for_fps += duration;
2674  sc->nb_frames_for_fps += total_sample_count;
2675 
2676  if (pb->eof_reached)
2677  return AVERROR_EOF;
2678 
2679  st->nb_frames= total_sample_count;
2680  if (duration)
2681  st->duration= duration;
2682  sc->track_end = duration;
2683  return 0;
2684 }
2685 
2687 {
2688  if (duration < 0) {
2689  if (duration == INT_MIN) {
2690  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2691  duration++;
2692  }
2693  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2694  }
2695 }
2696 
2698 {
2699  AVStream *st;
2700  MOVStreamContext *sc;
2701  unsigned int i, entries, ctts_count = 0;
2702 
2703  if (c->fc->nb_streams < 1)
2704  return 0;
2705  st = c->fc->streams[c->fc->nb_streams-1];
2706  sc = st->priv_data;
2707 
2708  avio_r8(pb); /* version */
2709  avio_rb24(pb); /* flags */
2710  entries = avio_rb32(pb);
2711 
2712  av_log(c->fc, AV_LOG_TRACE, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2713 
2714  if (!entries)
2715  return 0;
2716  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2717  return AVERROR_INVALIDDATA;
2718  av_freep(&sc->ctts_data);
2719  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2720  if (!sc->ctts_data)
2721  return AVERROR(ENOMEM);
2722 
2723  for (i = 0; i < entries && !pb->eof_reached; i++) {
2724  int count =avio_rb32(pb);
2725  int duration =avio_rb32(pb);
2726 
2727  if (count <= 0) {
2728  av_log(c->fc, AV_LOG_TRACE,
2729  "ignoring CTTS entry with count=%d duration=%d\n",
2730  count, duration);
2731  continue;
2732  }
2733 
2734  sc->ctts_data[ctts_count].count = count;
2735  sc->ctts_data[ctts_count].duration = duration;
2736  ctts_count++;
2737 
2738  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2739  count, duration);
2740 
2741  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2742  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2743  av_freep(&sc->ctts_data);
2744  sc->ctts_count = 0;
2745  return 0;
2746  }
2747 
2748  if (i+2<entries)
2749  mov_update_dts_shift(sc, duration);
2750  }
2751 
2752  sc->ctts_count = ctts_count;
2753 
2754  if (pb->eof_reached)
2755  return AVERROR_EOF;
2756 
2757  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2758 
2759  return 0;
2760 }
2761 
2763 {
2764  AVStream *st;
2765  MOVStreamContext *sc;
2766  unsigned int i, entries;
2767  uint8_t version;
2768  uint32_t grouping_type;
2769 
2770  if (c->fc->nb_streams < 1)
2771  return 0;
2772  st = c->fc->streams[c->fc->nb_streams-1];
2773  sc = st->priv_data;
2774 
2775  version = avio_r8(pb); /* version */
2776  avio_rb24(pb); /* flags */
2777  grouping_type = avio_rl32(pb);
2778  if (grouping_type != MKTAG( 'r','a','p',' '))
2779  return 0; /* only support 'rap ' grouping */
2780  if (version == 1)
2781  avio_rb32(pb); /* grouping_type_parameter */
2782 
2783  entries = avio_rb32(pb);
2784  if (!entries)
2785  return 0;
2786  if (sc->rap_group)
2787  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2788  av_free(sc->rap_group);
2789  sc->rap_group_count = 0;
2790  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2791  if (!sc->rap_group)
2792  return AVERROR(ENOMEM);
2793 
2794  for (i = 0; i < entries && !pb->eof_reached; i++) {
2795  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2796  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2797  }
2798 
2799  sc->rap_group_count = i;
2800 
2801  return pb->eof_reached ? AVERROR_EOF : 0;
2802 }
2803 
2804 /**
2805  * Get ith edit list entry (media time, duration).
2806  */
2808  const MOVStreamContext *msc,
2809  unsigned int edit_list_index,
2810  int64_t *edit_list_media_time,
2811  int64_t *edit_list_duration,
2812  int64_t global_timescale)
2813 {
2814  if (edit_list_index == msc->elst_count) {
2815  return 0;
2816  }
2817  *edit_list_media_time = msc->elst_data[edit_list_index].time;
2818  *edit_list_duration = msc->elst_data[edit_list_index].duration;
2819 
2820  /* duration is in global timescale units;convert to msc timescale */
2821  if (global_timescale == 0) {
2822  avpriv_request_sample(mov->fc, "Support for mvhd.timescale = 0 with editlists");
2823  return 0;
2824  }
2825  *edit_list_duration = av_rescale(*edit_list_duration, msc->time_scale,
2826  global_timescale);
2827  return 1;
2828 }
2829 
2830 /**
2831  * Find the closest previous frame to the timestamp, in e_old index
2832  * entries. Searching for just any frame / just key frames can be controlled by
2833  * last argument 'flag'.
2834  * Returns the index of the entry in st->index_entries if successful,
2835  * else returns -1.
2836  */
2838  AVIndexEntry *e_old,
2839  int nb_old,
2840  int64_t timestamp,
2841  int flag)
2842 {
2843  AVIndexEntry *e_keep = st->index_entries;
2844  int nb_keep = st->nb_index_entries;
2845  int64_t found = -1;
2846 
2847  st->index_entries = e_old;
2848  st->nb_index_entries = nb_old;
2849  found = av_index_search_timestamp(st, timestamp, flag | AVSEEK_FLAG_BACKWARD);
2850 
2851  /* restore AVStream state*/
2852  st->index_entries = e_keep;
2853  st->nb_index_entries = nb_keep;
2854  return found;
2855 }
2856 
2857 /**
2858  * Add index entry with the given values, to the end of st->index_entries.
2859  * Returns the new size st->index_entries if successful, else returns -1.
2860  *
2861  * This function is similar to ff_add_index_entry in libavformat/utils.c
2862  * except that here we are always unconditionally adding an index entry to
2863  * the end, instead of searching the entries list and skipping the add if
2864  * there is an existing entry with the same timestamp.
2865  * This is needed because the mov_fix_index calls this func with the same
2866  * unincremented timestamp for successive discarded frames.
2867  */
2868 static int64_t add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2869  int size, int distance, int flags)
2870 {
2871  AVIndexEntry *entries, *ie;
2872  int64_t index = -1;
2873  const size_t min_size_needed = (st->nb_index_entries + 1) * sizeof(AVIndexEntry);
2874 
2875  // Double the allocation each time, to lower memory fragmentation.
2876  // Another difference from ff_add_index_entry function.
2877  const size_t requested_size =
2878  min_size_needed > st->index_entries_allocated_size ?
2879  FFMAX(min_size_needed, 2 * st->index_entries_allocated_size) :
2880  min_size_needed;
2881 
2882  if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
2883  return -1;
2884 
2885  entries = av_fast_realloc(st->index_entries,
2887  requested_size);
2888  if(!entries)
2889  return -1;
2890 
2891  st->index_entries= entries;
2892 
2893  index= st->nb_index_entries++;
2894  ie= &entries[index];
2895 
2896  ie->pos = pos;
2897  ie->timestamp = timestamp;
2898  ie->min_distance= distance;
2899  ie->size= size;
2900  ie->flags = flags;
2901  return index;
2902 }
2903 
2904 /**
2905  * Rewrite timestamps of index entries in the range [end_index - frame_duration_buffer_size, end_index)
2906  * by subtracting end_ts successively by the amounts given in frame_duration_buffer.
2907  */
2908 static void fix_index_entry_timestamps(AVStream* st, int end_index, int64_t end_ts,
2909  int64_t* frame_duration_buffer,
2910  int frame_duration_buffer_size) {
2911  int i = 0;
2912  av_assert0(end_index >= 0 && end_index <= st->nb_index_entries);
2913  for (i = 0; i < frame_duration_buffer_size; i++) {
2914  end_ts -= frame_duration_buffer[frame_duration_buffer_size - 1 - i];
2915  st->index_entries[end_index - 1 - i].timestamp = end_ts;
2916  }
2917 }
2918 
2919 /**
2920  * Append a new ctts entry to ctts_data.
2921  * Returns the new ctts_count if successful, else returns -1.
2922  */
2923 static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
2924  int count, int duration)
2925 {
2926  MOVStts *ctts_buf_new;
2927  const size_t min_size_needed = (*ctts_count + 1) * sizeof(MOVStts);
2928  const size_t requested_size =
2929  min_size_needed > *allocated_size ?
2930  FFMAX(min_size_needed, 2 * (*allocated_size)) :
2931  min_size_needed;
2932 
2933  if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts))
2934  return -1;
2935 
2936  ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);
2937 
2938  if(!ctts_buf_new)
2939  return -1;
2940 
2941  *ctts_data = ctts_buf_new;
2942 
2943  ctts_buf_new[*ctts_count].count = count;
2944  ctts_buf_new[*ctts_count].duration = duration;
2945 
2946  *ctts_count = (*ctts_count) + 1;
2947  return *ctts_count;
2948 }
2949 
2950 /**
2951  * Fix st->index_entries, so that it contains only the entries (and the entries
2952  * which are needed to decode them) that fall in the edit list time ranges.
2953  * Also fixes the timestamps of the index entries to match the timeline
2954  * specified the edit lists.
2955  */
2956 static void mov_fix_index(MOVContext *mov, AVStream *st)
2957 {
2958  MOVStreamContext *msc = st->priv_data;
2959  AVIndexEntry *e_old = st->index_entries;
2960  int nb_old = st->nb_index_entries;
2961  const AVIndexEntry *e_old_end = e_old + nb_old;
2962  const AVIndexEntry *current = NULL;
2963  MOVStts *ctts_data_old = msc->ctts_data;
2964  int64_t ctts_index_old = 0;
2965  int64_t ctts_sample_old = 0;
2966  int64_t ctts_count_old = msc->ctts_count;
2967  int64_t edit_list_media_time = 0;
2968  int64_t edit_list_duration = 0;
2969  int64_t frame_duration = 0;
2970  int64_t edit_list_dts_counter = 0;
2971  int64_t edit_list_dts_entry_end = 0;
2972  int64_t edit_list_start_ctts_sample = 0;
2973  int64_t curr_cts;
2974  int64_t edit_list_index = 0;
2975  int64_t index;
2976  int64_t index_ctts_count;
2977  int flags;
2978  unsigned int ctts_allocated_size = 0;
2979  int64_t start_dts = 0;
2980  int64_t edit_list_media_time_dts = 0;
2981  int64_t edit_list_start_encountered = 0;
2982  int64_t search_timestamp = 0;
2983  int64_t* frame_duration_buffer = NULL;
2984  int num_discarded_begin = 0;
2985  int first_non_zero_audio_edit = -1;
2986  int packet_skip_samples = 0;
2987 
2988  if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
2989  return;
2990  }
2991  // Clean AVStream from traces of old index
2992  st->index_entries = NULL;
2994  st->nb_index_entries = 0;
2995 
2996  // Clean ctts fields of MOVStreamContext
2997  msc->ctts_data = NULL;
2998  msc->ctts_count = 0;
2999  msc->ctts_index = 0;
3000  msc->ctts_sample = 0;
3001 
3002  // If the dts_shift is positive (in case of negative ctts values in mov),
3003  // then negate the DTS by dts_shift
3004  if (msc->dts_shift > 0)
3005  edit_list_dts_entry_end -= msc->dts_shift;
3006 
3007  // Offset the DTS by ctts[0] to make the PTS of the first frame 0
3008  if (ctts_data_old && ctts_count_old > 0) {
3009  edit_list_dts_entry_end -= ctts_data_old[0].duration;
3010  av_log(mov->fc, AV_LOG_DEBUG, "Offset DTS by ctts[%d].duration: %d\n", 0, ctts_data_old[0].duration);
3011  }
3012 
3013  start_dts = edit_list_dts_entry_end;
3014 
3015  while (get_edit_list_entry(mov, msc, edit_list_index, &edit_list_media_time,
3016  &edit_list_duration, mov->time_scale)) {
3017  av_log(mov->fc, AV_LOG_DEBUG, "Processing st: %d, edit list %"PRId64" - media time: %"PRId64", duration: %"PRId64"\n",
3018  st->index, edit_list_index, edit_list_media_time, edit_list_duration);
3019  edit_list_index++;
3020  edit_list_dts_counter = edit_list_dts_entry_end;
3021  edit_list_dts_entry_end += edit_list_duration;
3022  num_discarded_begin = 0;
3023  if (edit_list_media_time == -1) {
3024  continue;
3025  }
3026 
3027  // If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
3028  // according to the edit list below.
3029  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3030  if (first_non_zero_audio_edit < 0) {
3031  first_non_zero_audio_edit = 1;
3032  } else {
3033  first_non_zero_audio_edit = 0;
3034  }
3035 
3036  if (first_non_zero_audio_edit > 0)
3037  st->skip_samples = msc->start_pad = 0;
3038  }
3039 
3040  //find closest previous key frame
3041  edit_list_media_time_dts = edit_list_media_time;
3042  if (msc->dts_shift > 0) {
3043  edit_list_media_time_dts -= msc->dts_shift;
3044  }
3045 
3046  // While reordering frame index according to edit list we must handle properly
3047  // the scenario when edit list entry starts from none key frame.
3048  // We find closest previous key frame and preserve it and consequent frames in index.
3049  // All frames which are outside edit list entry time boundaries will be dropped after decoding.
3050  search_timestamp = edit_list_media_time_dts;
3051  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3052  // Audio decoders like AAC need need a decoder delay samples previous to the current sample,
3053  // to correctly decode this frame. Hence for audio we seek to a frame 1 sec. before the
3054  // edit_list_media_time to cover the decoder delay.
3055  search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
3056  }
3057 
3058  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, 0);
3059  if (index == -1) {
3060  av_log(mov->fc, AV_LOG_WARNING,
3061  "st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
3062  st->index, edit_list_index, search_timestamp);
3063  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, AVSEEK_FLAG_ANY);
3064 
3065  if (index == -1) {
3066  av_log(mov->fc, AV_LOG_WARNING,
3067  "st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n"
3068  "Rounding edit list media time to zero.\n",
3069  st->index, edit_list_index, search_timestamp);
3070  index = 0;
3071  edit_list_media_time = 0;
3072  }
3073  }
3074  current = e_old + index;
3075 
3076  ctts_index_old = 0;
3077  ctts_sample_old = 0;
3078 
3079  // set ctts_index properly for the found key frame
3080  for (index_ctts_count = 0; index_ctts_count < index; index_ctts_count++) {
3081  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3082  ctts_sample_old++;
3083  if (ctts_data_old[ctts_index_old].count == ctts_sample_old) {
3084  ctts_index_old++;
3085  ctts_sample_old = 0;
3086  }
3087  }
3088  }
3089 
3090  edit_list_start_ctts_sample = ctts_sample_old;
3091 
3092  // Iterate over index and arrange it according to edit list
3093  edit_list_start_encountered = 0;
3094  for (; current < e_old_end; current++, index++) {
3095  // check if frame outside edit list mark it for discard
3096  frame_duration = (current + 1 < e_old_end) ?
3097  ((current + 1)->timestamp - current->timestamp) : edit_list_duration;
3098 
3099  flags = current->flags;
3100 
3101  // frames (pts) before or after edit list
3102  curr_cts = current->timestamp + msc->dts_shift;
3103 
3104  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3105  av_log(mov->fc, AV_LOG_DEBUG, "shifted frame pts, curr_cts: %"PRId64" @ %"PRId64", ctts: %d, ctts_count: %"PRId64"\n",
3106  curr_cts, ctts_index_old, ctts_data_old[ctts_index_old].duration, ctts_count_old);
3107  curr_cts += ctts_data_old[ctts_index_old].duration;
3108  ctts_sample_old++;
3109  if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
3110  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3111  &ctts_allocated_size,
3112  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3113  ctts_data_old[ctts_index_old].duration) == -1) {
3114  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3115  ctts_index_old,
3116  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3117  ctts_data_old[ctts_index_old].duration);
3118  break;
3119  }
3120  ctts_index_old++;
3121  ctts_sample_old = 0;
3122  edit_list_start_ctts_sample = 0;
3123  }
3124  }
3125 
3126  if (curr_cts < edit_list_media_time || curr_cts >= (edit_list_duration + edit_list_media_time)) {
3128  curr_cts < edit_list_media_time && curr_cts + frame_duration > edit_list_media_time &&
3129  first_non_zero_audio_edit > 0) {
3130  packet_skip_samples = edit_list_media_time - curr_cts;
3131  st->skip_samples += packet_skip_samples;
3132 
3133  // Shift the index entry timestamp by packet_skip_samples to be correct.
3134  edit_list_dts_counter -= packet_skip_samples;
3135  if (edit_list_start_encountered == 0) {
3136  edit_list_start_encountered = 1;
3137  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3138  // discarded packets.
3139  if (frame_duration_buffer) {
3140  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3141  frame_duration_buffer, num_discarded_begin);
3142  av_freep(&frame_duration_buffer);
3143  }
3144  }
3145 
3146  av_log(mov->fc, AV_LOG_DEBUG, "skip %d audio samples from curr_cts: %"PRId64"\n", packet_skip_samples, curr_cts);
3147  } else {
3148  flags |= AVINDEX_DISCARD_FRAME;
3149  av_log(mov->fc, AV_LOG_DEBUG, "drop a frame at curr_cts: %"PRId64" @ %"PRId64"\n", curr_cts, index);
3150 
3151  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && edit_list_start_encountered == 0) {
3152  num_discarded_begin++;
3153  frame_duration_buffer = av_realloc(frame_duration_buffer,
3154  num_discarded_begin * sizeof(int64_t));
3155  if (!frame_duration_buffer) {
3156  av_log(mov->fc, AV_LOG_ERROR, "Cannot reallocate frame duration buffer\n");
3157  break;
3158  }
3159  frame_duration_buffer[num_discarded_begin - 1] = frame_duration;
3160 
3161  // Increment skip_samples for the first non-zero audio edit list
3162  if (first_non_zero_audio_edit > 0 && st->codecpar->codec_id != AV_CODEC_ID_VORBIS) {
3163  st->skip_samples += frame_duration;
3164  msc->start_pad = st->skip_samples;
3165  }
3166  }
3167  }
3168  } else if (edit_list_start_encountered == 0) {
3169  edit_list_start_encountered = 1;
3170  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3171  // discarded packets.
3172  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && frame_duration_buffer) {
3173  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3174  frame_duration_buffer, num_discarded_begin);
3175  av_freep(&frame_duration_buffer);
3176  }
3177  }
3178 
3179  if (add_index_entry(st, current->pos, edit_list_dts_counter, current->size,
3180  current->min_distance, flags) == -1) {
3181  av_log(mov->fc, AV_LOG_ERROR, "Cannot add index entry\n");
3182  break;
3183  }
3184 
3185  // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list.
3186  if (edit_list_start_encountered > 0) {
3187  edit_list_dts_counter = edit_list_dts_counter + frame_duration;
3188  }
3189 
3190  // Break when found first key frame after edit entry completion
3191  if (((curr_cts + frame_duration) >= (edit_list_duration + edit_list_media_time)) &&
3192  ((flags & AVINDEX_KEYFRAME) || ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)))) {
3193 
3194  if (ctts_data_old && ctts_sample_old != 0) {
3195  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3196  &ctts_allocated_size,
3197  ctts_sample_old - edit_list_start_ctts_sample,
3198  ctts_data_old[ctts_index_old].duration) == -1) {
3199  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3200  ctts_index_old, ctts_sample_old - edit_list_start_ctts_sample,
3201  ctts_data_old[ctts_index_old].duration);
3202  break;
3203  }
3204  }
3205  break;
3206  }
3207  }
3208  }
3209  // Update av stream length
3210  st->duration = edit_list_dts_entry_end - start_dts;
3211 
3212  // Free the old index and the old CTTS structures
3213  av_free(e_old);
3214  av_free(ctts_data_old);
3215 }
3216 
3217 static void mov_build_index(MOVContext *mov, AVStream *st)
3218 {
3219  MOVStreamContext *sc = st->priv_data;
3220  int64_t current_offset;
3221  int64_t current_dts = 0;
3222  unsigned int stts_index = 0;
3223  unsigned int stsc_index = 0;
3224  unsigned int stss_index = 0;
3225  unsigned int stps_index = 0;
3226  unsigned int i, j;
3227  uint64_t stream_size = 0;
3228 
3229  if (sc->elst_count) {
3230  int i, edit_start_index = 0;
3231  int64_t empty_duration = 0; // empty duration of the first edit list entry
3232  int64_t start_time = 0; // start time of the media
3233 
3234  for (i = 0; i < sc->elst_count; i++) {
3235  const MOVElst *e = &sc->elst_data[i];
3236  if (i == 0 && e->time == -1) {
3237  /* if empty, the first entry is the start time of the stream
3238  * relative to the presentation itself */
3239  empty_duration = e->duration;
3240  edit_start_index = 1;
3241  } else if (i == edit_start_index && e->time >= 0) {
3242  start_time = e->time;
3243  }
3244  }
3245 
3246  /* adjust first dts according to edit list */
3247  if ((empty_duration || start_time) && mov->time_scale > 0) {
3248  if (empty_duration)
3249  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
3250  sc->time_offset = start_time - empty_duration;
3251  }
3252  }
3253 
3254  /* only use old uncompressed audio chunk demuxing when stts specifies it */
3255  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3256  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
3257  unsigned int current_sample = 0;
3258  unsigned int stts_sample = 0;
3259  unsigned int sample_size;
3260  unsigned int distance = 0;
3261  unsigned int rap_group_index = 0;
3262  unsigned int rap_group_sample = 0;
3263  int64_t last_dts = 0;
3264  int64_t dts_correction = 0;
3265  int rap_group_present = sc->rap_group_count && sc->rap_group;
3266  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
3267 
3268  current_dts -= sc->dts_shift;
3269  last_dts = current_dts;
3270 
3271  if (!sc->sample_count || st->nb_index_entries)
3272  return;
3273  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3274  return;
3276  st->nb_index_entries + sc->sample_count,
3277  sizeof(*st->index_entries)) < 0) {
3278  st->nb_index_entries = 0;
3279  return;
3280  }
3282 
3283  for (i = 0; i < sc->chunk_count; i++) {
3284  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
3285  current_offset = sc->chunk_offsets[i];
3286  while (stsc_index + 1 < sc->stsc_count &&
3287  i + 1 == sc->stsc_data[stsc_index + 1].first)
3288  stsc_index++;
3289 
3290  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
3291  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
3292  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
3293  sc->stsz_sample_size = sc->sample_size;
3294  }
3295  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
3296  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
3297  sc->stsz_sample_size = sc->sample_size;
3298  }
3299 
3300  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
3301  int keyframe = 0;
3302  if (current_sample >= sc->sample_count) {
3303  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
3304  return;
3305  }
3306 
3307  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
3308  keyframe = 1;
3309  if (stss_index + 1 < sc->keyframe_count)
3310  stss_index++;
3311  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
3312  keyframe = 1;
3313  if (stps_index + 1 < sc->stps_count)
3314  stps_index++;
3315  }
3316  if (rap_group_present && rap_group_index < sc->rap_group_count) {
3317  if (sc->rap_group[rap_group_index].index > 0)
3318  keyframe = 1;
3319  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
3320  rap_group_sample = 0;
3321  rap_group_index++;
3322  }
3323  }
3324  if (sc->keyframe_absent
3325  && !sc->stps_count
3326  && !rap_group_present
3327  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
3328  keyframe = 1;
3329  if (keyframe)
3330  distance = 0;
3331  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
3332  if (sc->pseudo_stream_id == -1 ||
3333  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
3334  AVIndexEntry *e;
3335  if (sample_size > 0x3FFFFFFF) {
3336  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
3337  return;
3338  }
3339  e = &st->index_entries[st->nb_index_entries++];
3340  e->pos = current_offset;
3341  e->timestamp = current_dts;
3342  e->size = sample_size;
3343  e->min_distance = distance;
3344  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
3345  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3346  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
3347  current_offset, current_dts, sample_size, distance, keyframe);
3348  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
3349  ff_rfps_add_frame(mov->fc, st, current_dts);
3350  }
3351 
3352  current_offset += sample_size;
3353  stream_size += sample_size;
3354 
3355  /* A negative sample duration is invalid based on the spec,
3356  * but some samples need it to correct the DTS. */
3357  if (sc->stts_data[stts_index].duration < 0) {
3358  av_log(mov->fc, AV_LOG_WARNING,
3359  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
3360  sc->stts_data[stts_index].duration, stts_index,
3361  st->index);
3362  dts_correction += sc->stts_data[stts_index].duration - 1;
3363  sc->stts_data[stts_index].duration = 1;
3364  }
3365  current_dts += sc->stts_data[stts_index].duration;
3366  if (!dts_correction || current_dts + dts_correction > last_dts) {
3367  current_dts += dts_correction;
3368  dts_correction = 0;
3369  } else {
3370  /* Avoid creating non-monotonous DTS */
3371  dts_correction += current_dts - last_dts - 1;
3372  current_dts = last_dts + 1;
3373  }
3374  last_dts = current_dts;
3375  distance++;
3376  stts_sample++;
3377  current_sample++;
3378  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
3379  stts_sample = 0;
3380  stts_index++;
3381  }
3382  }
3383  }
3384  if (st->duration > 0)
3385  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
3386  } else {
3387  unsigned chunk_samples, total = 0;
3388 
3389  // compute total chunk count
3390  for (i = 0; i < sc->stsc_count; i++) {
3391  unsigned count, chunk_count;
3392 
3393  chunk_samples = sc->stsc_data[i].count;
3394  if (i != sc->stsc_count - 1 &&
3395  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
3396  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
3397  return;
3398  }
3399 
3400  if (sc->samples_per_frame >= 160) { // gsm
3401  count = chunk_samples / sc->samples_per_frame;
3402  } else if (sc->samples_per_frame > 1) {
3403  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
3404  count = (chunk_samples+samples-1) / samples;
3405  } else {
3406  count = (chunk_samples+1023) / 1024;
3407  }
3408 
3409  if (i < sc->stsc_count - 1)
3410  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
3411  else
3412  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
3413  total += chunk_count * count;
3414  }
3415 
3416  av_log(mov->fc, AV_LOG_TRACE, "chunk count %d\n", total);
3417  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3418  return;
3420  st->nb_index_entries + total,
3421  sizeof(*st->index_entries)) < 0) {
3422  st->nb_index_entries = 0;
3423  return;
3424  }
3425  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
3426 
3427  // populate index
3428  for (i = 0; i < sc->chunk_count; i++) {
3429  current_offset = sc->chunk_offsets[i];
3430  if (stsc_index + 1 < sc->stsc_count &&
3431  i + 1 == sc->stsc_data[stsc_index + 1].first)
3432  stsc_index++;
3433  chunk_samples = sc->stsc_data[stsc_index].count;
3434 
3435  while (chunk_samples > 0) {
3436  AVIndexEntry *e;
3437  unsigned size, samples;
3438 
3439  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3441  "Zero bytes per frame, but %d samples per frame",
3442  sc->samples_per_frame);
3443  return;
3444  }
3445 
3446  if (sc->samples_per_frame >= 160) { // gsm
3447  samples = sc->samples_per_frame;
3448  size = sc->bytes_per_frame;
3449  } else {
3450  if (sc->samples_per_frame > 1) {
3451  samples = FFMIN((1024 / sc->samples_per_frame)*
3452  sc->samples_per_frame, chunk_samples);
3453  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3454  } else {
3455  samples = FFMIN(1024, chunk_samples);
3456  size = samples * sc->sample_size;
3457  }
3458  }
3459 
3460  if (st->nb_index_entries >= total) {
3461  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
3462  return;
3463  }
3464  if (size > 0x3FFFFFFF) {
3465  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
3466  return;
3467  }
3468  e = &st->index_entries[st->nb_index_entries++];
3469  e->pos = current_offset;
3470  e->timestamp = current_dts;
3471  e->size = size;
3472  e->min_distance = 0;
3473  e->flags = AVINDEX_KEYFRAME;
3474  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
3475  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
3476  size, samples);
3477 
3478  current_offset += size;
3479  current_dts += samples;
3480  chunk_samples -= samples;
3481  }
3482  }
3483  }
3484 
3485  // Fix index according to edit lists.
3486  mov_fix_index(mov, st);
3487 }
3488 
3489 static int test_same_origin(const char *src, const char *ref) {
3490  char src_proto[64];
3491  char ref_proto[64];
3492  char src_auth[256];
3493  char ref_auth[256];
3494  char src_host[256];
3495  char ref_host[256];
3496  int src_port=-1;
3497  int ref_port=-1;
3498 
3499  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
3500  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
3501 
3502  if (strlen(src) == 0) {
3503  return -1;
3504  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
3505  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
3506  strlen(src_host) + 1 >= sizeof(src_host) ||
3507  strlen(ref_host) + 1 >= sizeof(ref_host)) {
3508  return 0;
3509  } else if (strcmp(src_proto, ref_proto) ||
3510  strcmp(src_auth, ref_auth) ||
3511  strcmp(src_host, ref_host) ||
3512  src_port != ref_port) {
3513  return 0;
3514  } else
3515  return 1;
3516 }
3517 
3518 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
3519 {
3520  /* try relative path, we do not try the absolute because it can leak information about our
3521  system to an attacker */
3522  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
3523  char filename[1025];
3524  const char *src_path;
3525  int i, l;
3526 
3527  /* find a source dir */
3528  src_path = strrchr(src, '/');
3529  if (src_path)
3530  src_path++;
3531  else
3532  src_path = src;
3533 
3534  /* find a next level down to target */
3535  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
3536  if (ref->path[l] == '/') {
3537  if (i == ref->nlvl_to - 1)
3538  break;
3539  else
3540  i++;
3541  }
3542 
3543  /* compose filename if next level down to target was found */
3544  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3545  memcpy(filename, src, src_path - src);
3546  filename[src_path - src] = 0;
3547 
3548  for (i = 1; i < ref->nlvl_from; i++)
3549  av_strlcat(filename, "../", sizeof(filename));
3550 
3551  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3552  if (!c->use_absolute_path) {
3553  int same_origin = test_same_origin(src, filename);
3554 
3555  if (!same_origin) {
3556  av_log(c->fc, AV_LOG_ERROR,
3557  "Reference with mismatching origin, %s not tried for security reasons, "
3558  "set demuxer option use_absolute_path to allow it anyway\n",
3559  ref->path);
3560  return AVERROR(ENOENT);
3561  }
3562 
3563  if(strstr(ref->path + l + 1, "..") ||
3564  strstr(ref->path + l + 1, ":") ||
3565  (ref->nlvl_from > 1 && same_origin < 0) ||
3566  (filename[0] == '/' && src_path == src))
3567  return AVERROR(ENOENT);
3568  }
3569 
3570  if (strlen(filename) + 1 == sizeof(filename))
3571  return AVERROR(ENOENT);
3572  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3573  return 0;
3574  }
3575  } else if (c->use_absolute_path) {
3576  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3577  "this is a possible security issue\n");
3578  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3579  return 0;
3580  } else {
3581  av_log(c->fc, AV_LOG_ERROR,
3582  "Absolute path %s not tried for security reasons, "
3583  "set demuxer option use_absolute_path to allow absolute paths\n",
3584  ref->path);
3585  }
3586 
3587  return AVERROR(ENOENT);
3588 }
3589 
3591 {
3592  if (sc->time_scale <= 0) {
3593  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3594  sc->time_scale = c->time_scale;
3595  if (sc->time_scale <= 0)
3596  sc->time_scale = 1;
3597  }
3598 }
3599 
3601 {
3602  AVStream *st;
3603  MOVStreamContext *sc;
3604  int ret;
3605 
3606  st = avformat_new_stream(c->fc, NULL);
3607  if (!st) return AVERROR(ENOMEM);
3608  st->id = c->fc->nb_streams;
3609  sc = av_mallocz(sizeof(MOVStreamContext));
3610  if (!sc) return AVERROR(ENOMEM);
3611 
3612  st->priv_data = sc;
3614  sc->ffindex = st->index;
3615  c->trak_index = st->index;
3616 
3617  if ((ret = mov_read_default(c, pb, atom)) < 0)
3618  return ret;
3619 
3620  c->trak_index = -1;
3621 
3622  /* sanity checks */
3623  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3624  (!sc->sample_size && !sc->sample_count))) {
3625  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3626  st->index);
3627  return 0;
3628  }
3629 
3630  fix_timescale(c, sc);
3631 
3632  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3633 
3634  mov_build_index(c, st);
3635 
3636  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3637  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3638  if (c->enable_drefs) {
3639  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3640  av_log(c->fc, AV_LOG_ERROR,
3641  "stream %d, error opening alias: path='%s', dir='%s', "
3642  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3643  st->index, dref->path, dref->dir, dref->filename,
3644  dref->volume, dref->nlvl_from, dref->nlvl_to);
3645  } else {
3646  av_log(c->fc, AV_LOG_WARNING,
3647  "Skipped opening external track: "
3648  "stream %d, alias: path='%s', dir='%s', "
3649  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3650  "Set enable_drefs to allow this.\n",
3651  st->index, dref->path, dref->dir, dref->filename,
3652  dref->volume, dref->nlvl_from, dref->nlvl_to);
3653  }
3654  } else {
3655  sc->pb = c->fc->pb;
3656  sc->pb_is_copied = 1;
3657  }
3658 
3659  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3660  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3661  sc->height && sc->width &&
3662  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3663  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3664  ((double)st->codecpar->width * sc->height), INT_MAX);
3665  }
3666 
3667 #if FF_API_R_FRAME_RATE
3668  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3670  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3671 #endif
3672  }
3673 
3674  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3675  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3676  TAG_IS_AVCI(st->codecpar->codec_tag)) {
3677  ret = ff_generate_avci_extradata(st);
3678  if (ret < 0)
3679  return ret;
3680  }
3681 
3682  switch (st->codecpar->codec_id) {
3683 #if CONFIG_H261_DECODER
3684  case AV_CODEC_ID_H261:
3685 #endif
3686 #if CONFIG_H263_DECODER
3687  case AV_CODEC_ID_H263:
3688 #endif
3689 #if CONFIG_MPEG4_DECODER
3690  case AV_CODEC_ID_MPEG4:
3691 #endif
3692  st->codecpar->width = 0; /* let decoder init width/height */
3693  st->codecpar->height= 0;
3694  break;
3695  }
3696 
3697  // If the duration of the mp3 packets is not constant, then they could need a parser
3698  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3699  && sc->stts_count > 3
3700  && sc->stts_count*10 > st->nb_frames
3701  && sc->time_scale == st->codecpar->sample_rate) {
3703  }
3704  /* Do not need those anymore. */
3705  av_freep(&sc->chunk_offsets);
3706  av_freep(&sc->sample_sizes);
3707  av_freep(&sc->keyframes);
3708  av_freep(&sc->stts_data);
3709  av_freep(&sc->stps_data);
3710  av_freep(&sc->elst_data);
3711  av_freep(&sc->rap_group);
3712 
3713  return 0;
3714 }
3715 
3717 {
3718  int ret;
3719  c->itunes_metadata = 1;
3720  ret = mov_read_default(c, pb, atom);
3721  c->itunes_metadata = 0;
3722  return ret;
3723 }
3724 
3726 {
3727  uint32_t count;
3728  uint32_t i;
3729 
3730  if (atom.size < 8)
3731  return 0;
3732 
3733  avio_skip(pb, 4);
3734  count = avio_rb32(pb);
3735  if (count > UINT_MAX / sizeof(*c->meta_keys) - 1) {
3736  av_log(c->fc, AV_LOG_ERROR,
3737  "The 'keys' atom with the invalid key count: %d\n", count);
3738  return AVERROR_INVALIDDATA;
3739  }
3740 
3741  c->meta_keys_count = count + 1;
3742  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3743  if (!c->meta_keys)
3744  return AVERROR(ENOMEM);
3745 
3746  for (i = 1; i <= count; ++i) {
3747  uint32_t key_size = avio_rb32(pb);
3748  uint32_t type = avio_rl32(pb);
3749  if (key_size < 8) {
3750  av_log(c->fc, AV_LOG_ERROR,
3751  "The key# %d in meta has invalid size: %d\n", i, key_size);
3752  return AVERROR_INVALIDDATA;
3753  }
3754  key_size -= 8;
3755  if (type != MKTAG('m','d','t','a')) {
3756  avio_skip(pb, key_size);
3757  }
3758  c->meta_keys[i] = av_mallocz(key_size + 1);
3759  if (!c->meta_keys[i])
3760  return AVERROR(ENOMEM);
3761  avio_read(pb, c->meta_keys[i], key_size);
3762  }
3763 
3764  return 0;
3765 }
3766 
3768 {
3769  int64_t end = avio_tell(pb) + atom.size;
3770  uint8_t *key = NULL, *val = NULL, *mean = NULL;
3771  int i;
3772  int ret = 0;
3773  AVStream *st;
3774  MOVStreamContext *sc;
3775 
3776  if (c->fc->nb_streams < 1)
3777  return 0;
3778  st = c->fc->streams[c->fc->nb_streams-1];
3779  sc = st->priv_data;
3780 
3781  for (i = 0; i < 3; i++) {
3782  uint8_t **p;
3783  uint32_t len, tag;
3784 
3785  if (end - avio_tell(pb) <= 12)
3786  break;
3787 
3788  len = avio_rb32(pb);
3789  tag = avio_rl32(pb);
3790  avio_skip(pb, 4); // flags
3791 
3792  if (len < 12 || len - 12 > end - avio_tell(pb))
3793  break;
3794  len -= 12;
3795 
3796  if (tag == MKTAG('m', 'e', 'a', 'n'))
3797  p = &mean;
3798  else if (tag == MKTAG('n', 'a', 'm', 'e'))
3799  p = &key;
3800  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3801  avio_skip(pb, 4);
3802  len -= 4;
3803  p = &val;
3804  } else
3805  break;
3806 
3807  *p = av_malloc(len + 1);
3808  if (!*p)
3809  break;
3810  ret = ffio_read_size(pb, *p, len);
3811  if (ret < 0) {
3812  av_freep(p);
3813  break;
3814  }
3815  (*p)[len] = 0;
3816  }
3817 
3818  if (mean && key && val) {
3819  if (strcmp(key, "iTunSMPB") == 0) {
3820  int priming, remainder, samples;
3821  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3822  if(priming>0 && priming<16384)
3823  sc->start_pad = priming;
3824  }
3825  }
3826  if (strcmp(key, "cdec") != 0) {
3827  av_dict_set(&c->fc->metadata, key, val,
3829  key = val = NULL;
3830  }
3831  } else {
3832  av_log(c->fc, AV_LOG_VERBOSE,
3833  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3834  }
3835 
3836  avio_seek(pb, end, SEEK_SET);
3837  av_freep(&key);
3838  av_freep(&val);
3839  av_freep(&mean);
3840  return ret;
3841 }
3842 
3844 {
3845  while (atom.size > 8) {
3846  uint32_t tag = avio_rl32(pb);
3847  atom.size -= 4;
3848  if (tag == MKTAG('h','d','l','r')) {
3849  avio_seek(pb, -8, SEEK_CUR);
3850  atom.size += 8;
3851  return mov_read_default(c, pb, atom);
3852  }
3853  }
3854  return 0;
3855 }
3856 
3857 // return 1 when matrix is identity, 0 otherwise
3858 #define IS_MATRIX_IDENT(matrix) \
3859  ( (matrix)[0][0] == (1 << 16) && \
3860  (matrix)[1][1] == (1 << 16) && \
3861  (matrix)[2][2] == (1 << 30) && \
3862  !(matrix)[0][1] && !(matrix)[0][2] && \
3863  !(matrix)[1][0] && !(matrix)[1][2] && \
3864  !(matrix)[2][0] && !(matrix)[2][1])
3865 
3867 {
3868  int i, j, e;
3869  int width;
3870  int height;
3871  int display_matrix[3][3];
3872  int res_display_matrix[3][3] = { { 0 } };
3873  AVStream *st;
3874  MOVStreamContext *sc;
3875  int version;
3876  int flags;
3877 
3878  if (c->fc->nb_streams < 1)
3879  return 0;
3880  st = c->fc->streams[c->fc->nb_streams-1];
3881  sc = st->priv_data;
3882 
3883  version = avio_r8(pb);
3884  flags = avio_rb24(pb);
3886 
3887  if (version == 1) {
3888  avio_rb64(pb);
3889  avio_rb64(pb);
3890  } else {
3891  avio_rb32(pb); /* creation time */
3892  avio_rb32(pb); /* modification time */
3893  }
3894  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
3895  avio_rb32(pb); /* reserved */
3896 
3897  /* highlevel (considering edits) duration in movie timebase */
3898  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
3899  avio_rb32(pb); /* reserved */
3900  avio_rb32(pb); /* reserved */
3901 
3902  avio_rb16(pb); /* layer */
3903  avio_rb16(pb); /* alternate group */
3904  avio_rb16(pb); /* volume */
3905  avio_rb16(pb); /* reserved */
3906 
3907  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
3908  // they're kept in fixed point format through all calculations
3909  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
3910  // side data, but the scale factor is not needed to calculate aspect ratio
3911  for (i = 0; i < 3; i++) {
3912  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
3913  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
3914  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
3915  }
3916 
3917  width = avio_rb32(pb); // 16.16 fixed point track width
3918  height = avio_rb32(pb); // 16.16 fixed point track height
3919  sc->width = width >> 16;
3920  sc->height = height >> 16;
3921 
3922  // apply the moov display matrix (after the tkhd one)
3923  for (i = 0; i < 3; i++) {
3924  const int sh[3] = { 16, 16, 30 };
3925  for (j = 0; j < 3; j++) {
3926  for (e = 0; e < 3; e++) {
3927  res_display_matrix[i][j] +=
3928  ((int64_t) display_matrix[i][e] *
3929  c->movie_display_matrix[e][j]) >> sh[e];
3930  }
3931  }
3932  }
3933 
3934  // save the matrix when it is not the default identity
3935  if (!IS_MATRIX_IDENT(res_display_matrix)) {
3936  double rotate;
3937 
3938  av_freep(&sc->display_matrix);
3939  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
3940  if (!sc->display_matrix)
3941  return AVERROR(ENOMEM);
3942 
3943  for (i = 0; i < 3; i++)
3944  for (j = 0; j < 3; j++)
3945  sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
3946 
3948  if (!isnan(rotate)) {
3949  char rotate_buf[64];
3950  rotate = -rotate;
3951  if (rotate < 0) // for backward compatibility
3952  rotate += 360;
3953  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
3954  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
3955  }
3956  }
3957 
3958  // transform the display width/height according to the matrix
3959  // to keep the same scale, use [width height 1<<16]
3960  if (width && height && sc->display_matrix) {
3961  double disp_transform[2];
3962 
3963  for (i = 0; i < 2; i++)
3964  disp_transform[i] = hypot(sc->display_matrix[0 + i],
3965  sc->display_matrix[3 + i]);
3966 
3967  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
3968  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
3969  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
3971  disp_transform[0] / disp_transform[1],
3972  INT_MAX);
3973  }
3974  return 0;
3975 }
3976 
3978 {
3979  MOVFragment *frag = &c->fragment;
3980  MOVTrackExt *trex = NULL;
3982  int flags, track_id, i, found = 0;
3983 
3984  avio_r8(pb); /* version */
3985  flags = avio_rb24(pb);
3986 
3987  track_id = avio_rb32(pb);
3988  if (!track_id)
3989  return AVERROR_INVALIDDATA;
3990  frag->track_id = track_id;
3991  for (i = 0; i < c->trex_count; i++)
3992  if (c->trex_data[i].track_id == frag->track_id) {
3993  trex = &c->trex_data[i];
3994  break;
3995  }
3996  if (!trex) {
3997  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
3998  return AVERROR_INVALIDDATA;
3999  }
4000 
4003  frag->moof_offset : frag->implicit_offset;
4004  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
4005 
4006  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
4007  avio_rb32(pb) : trex->duration;
4008  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
4009  avio_rb32(pb) : trex->size;
4010  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
4011  avio_rb32(pb) : trex->flags;
4012  frag->time = AV_NOPTS_VALUE;
4013  for (i = 0; i < c->fragment_index_count; i++) {
4014  int j;
4015  MOVFragmentIndex* candidate = c->fragment_index_data[i];
4016  if (candidate->track_id == frag->track_id) {
4017  av_log(c->fc, AV_LOG_DEBUG,
4018  "found fragment index for track %u\n", frag->track_id);
4019  index = candidate;
4020  for (j = index->current_item; j < index->item_count; j++) {
4021  if (frag->implicit_offset == index->items[j].moof_offset) {
4022  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
4023  "for track %u and moof_offset %"PRId64"\n",
4024  frag->track_id, index->items[j].moof_offset);
4025  frag->time = index->items[j].time;
4026  index->current_item = j + 1;
4027  found = 1;
4028  break;
4029  }
4030  }
4031  if (found)
4032  break;
4033  }
4034  }
4035  if (index && !found) {
4036  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
4037  "it doesn't have an (in-order) entry for moof_offset "
4038  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
4039  }
4040  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
4041  return 0;
4042 }
4043 
4045 {
4046  unsigned i, num;
4047  void *new_tracks;
4048 
4049  num = atom.size / 4;
4050  if (!(new_tracks = av_malloc_array(num, sizeof(int))))
4051  return AVERROR(ENOMEM);
4052 
4053  av_free(c->chapter_tracks);
4054  c->chapter_tracks = new_tracks;
4055  c->nb_chapter_tracks = num;
4056 
4057  for (i = 0; i < num && !pb->eof_reached; i++)
4058  c->chapter_tracks[i] = avio_rb32(pb);
4059 
4060  return 0;
4061 }
4062 
4064 {
4065  MOVTrackExt *trex;
4066  int err;
4067 
4068  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
4069  return AVERROR_INVALIDDATA;
4070  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
4071  sizeof(*c->trex_data))) < 0) {
4072  c->trex_count = 0;
4073  return err;
4074  }
4075 
4076  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
4077 
4078  trex = &c->trex_data[c->trex_count++];
4079  avio_r8(pb); /* version */
4080  avio_rb24(pb); /* flags */
4081  trex->track_id = avio_rb32(pb);
4082  trex->stsd_id = avio_rb32(pb);
4083  trex->duration = avio_rb32(pb);
4084  trex->size = avio_rb32(pb);
4085  trex->flags = avio_rb32(pb);
4086  return 0;
4087 }
4088 
4090 {
4091  MOVFragment *frag = &c->fragment;
4092  AVStream *st = NULL;
4093  MOVStreamContext *sc;
4094  int version, i;
4095 
4096  for (i = 0; i < c->fc->nb_streams; i++) {
4097  if (c->fc->streams[i]->id == frag->track_id) {
4098  st = c->fc->streams[i];
4099  break;
4100  }
4101  }
4102  if (!st) {
4103  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
4104  return AVERROR_INVALIDDATA;
4105  }
4106  sc = st->priv_data;
4107  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
4108  return 0;
4109  version = avio_r8(pb);
4110  avio_rb24(pb); /* flags */
4111  if (version) {
4112  sc->track_end = avio_rb64(pb);
4113  } else {
4114  sc->track_end = avio_rb32(pb);
4115  }
4116  return 0;
4117 }
4118 
4120 {
4121  MOVFragment *frag = &c->fragment;
4122  AVStream *st = NULL;
4123  MOVStreamContext *sc;
4124  MOVStts *ctts_data;
4125  uint64_t offset;
4126  int64_t dts;
4127  int data_offset = 0;
4128  unsigned entries, first_sample_flags = frag->flags;
4129  int flags, distance, i, err;
4130 
4131  for (i = 0; i < c->fc->nb_streams; i++) {
4132  if (c->fc->streams[i]->id == frag->track_id) {
4133  st = c->fc->streams[i];
4134  break;
4135  }
4136  }
4137  if (!st) {
4138  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
4139  return AVERROR_INVALIDDATA;
4140  }
4141  sc = st->priv_data;
4142  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4143  return 0;
4144  avio_r8(pb); /* version */
4145  flags = avio_rb24(pb);
4146  entries = avio_rb32(pb);
4147  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %d\n", flags, entries);
4148 
4149  /* Always assume the presence of composition time offsets.
4150  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
4151  * 1) in the initial movie, there are no samples.
4152  * 2) in the first movie fragment, there is only one sample without composition time offset.
4153  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
4154  if (!sc->ctts_count && sc->sample_count)
4155  {
4156  /* Complement ctts table if moov atom doesn't have ctts atom. */
4157  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
4158  if (!ctts_data)
4159  return AVERROR(ENOMEM);
4160  sc->ctts_data = ctts_data;
4161  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
4162  sc->ctts_data[sc->ctts_count].duration = 0;
4163  sc->ctts_count++;
4164  }
4165  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
4166  return AVERROR_INVALIDDATA;
4167  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
4168  sizeof(*sc->ctts_data))) < 0) {
4169  sc->ctts_count = 0;
4170  return err;
4171  }
4172  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
4173  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
4174  dts = sc->track_end - sc->time_offset;
4175  offset = frag->base_data_offset + data_offset;
4176  distance = 0;
4177  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
4178  for (i = 0; i < entries && !pb->eof_reached; i++) {
4179  unsigned sample_size = frag->size;
4180  int sample_flags = i ? frag->flags : first_sample_flags;
4181  unsigned sample_duration = frag->duration;
4182  int keyframe = 0;
4183 
4184  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
4185  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
4186  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
4187  sc->ctts_data[sc->ctts_count].count = 1;
4188  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
4189  avio_rb32(pb) : 0;
4191  if (frag->time != AV_NOPTS_VALUE) {
4192  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
4193  int64_t pts = frag->time;
4194  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4195  " sc->dts_shift %d ctts.duration %d"
4196  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
4197  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
4198  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
4199  dts = pts - sc->dts_shift;
4200  if (flags & MOV_TRUN_SAMPLE_CTS) {
4201  dts -= sc->ctts_data[sc->ctts_count].duration;
4202  } else {
4203  dts -= sc->time_offset;
4204  }
4205  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
4206  } else {
4207  dts = frag->time - sc->time_offset;
4208  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4209  ", using it for dts\n", dts);
4210  }
4211  frag->time = AV_NOPTS_VALUE;
4212  }
4213  sc->ctts_count++;
4215  keyframe = 1;
4216  else
4217  keyframe =
4218  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
4220  if (keyframe)
4221  distance = 0;
4222  err = av_add_index_entry(st, offset, dts, sample_size, distance,
4223  keyframe ? AVINDEX_KEYFRAME : 0);
4224  if (err < 0) {
4225  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
4226  }
4227  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
4228  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
4229  offset, dts, sample_size, distance, keyframe);
4230  distance++;
4231  dts += sample_duration;
4232  offset += sample_size;
4233  sc->data_size += sample_size;
4234  sc->duration_for_fps += sample_duration;
4235  sc->nb_frames_for_fps ++;
4236  }
4237 
4238  if (pb->eof_reached)
4239  return AVERROR_EOF;
4240 
4241  frag->implicit_offset = offset;
4242 
4243  sc->track_end = dts + sc->time_offset;
4244  if (st->duration < sc->track_end)
4245  st->duration = sc->track_end;
4246 
4247  return 0;
4248 }
4249 
4251 {
4252  int64_t offset = avio_tell(pb) + atom.size, pts;
4253  uint8_t version;
4254  unsigned i, track_id;
4255  AVStream *st = NULL;
4256  AVStream *ref_st;
4257  MOVStreamContext *sc, *ref_sc;
4260  AVRational timescale;
4261 
4262  version = avio_r8(pb);
4263  if (version > 1) {
4264  avpriv_request_sample(c->fc, "sidx version %u", version);
4265  return 0;
4266  }
4267 
4268  avio_rb24(pb); // flags
4269 
4270  track_id = avio_rb32(pb); // Reference ID
4271  for (i = 0; i < c->fc->nb_streams; i++) {
4272  if (c->fc->streams[i]->id == track_id) {
4273  st = c->fc->streams[i];
4274  break;
4275  }
4276  }
4277  if (!st) {
4278  av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
4279  return 0;
4280  }
4281 
4282  sc = st->priv_data;
4283 
4284  timescale = av_make_q(1, avio_rb32(pb));
4285 
4286  if (timescale.den <= 0) {
4287  av_log(c->fc, AV_LOG_ERROR, "Invalid sidx timescale 1/%d\n", timescale.den);
4288  return AVERROR_INVALIDDATA;
4289  }
4290 
4291  if (version == 0) {
4292  pts = avio_rb32(pb);
4293  offset += avio_rb32(pb);
4294  } else {
4295  pts = avio_rb64(pb);
4296  offset += avio_rb64(pb);
4297  }
4298 
4299  avio_rb16(pb); // reserved
4300 
4301  index = av_mallocz(sizeof(MOVFragmentIndex));
4302  if (!index)
4303  return AVERROR(ENOMEM);
4304 
4305  index->track_id = track_id;
4306 
4307  index->item_count = avio_rb16(pb);
4308  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
4309 
4310  if (!index->items) {
4311  av_freep(&index);
4312  return AVERROR(ENOMEM);
4313  }
4314 
4315  for (i = 0; i < index->item_count; i++) {
4316  uint32_t size = avio_rb32(pb);
4317  uint32_t duration = avio_rb32(pb);
4318  if (size & 0x80000000) {
4319  avpriv_request_sample(c->fc, "sidx reference_type 1");
4320  av_freep(&index->items);
4321  av_freep(&index);
4322  return AVERROR_PATCHWELCOME;
4323  }
4324  avio_rb32(pb); // sap_flags
4325  index->items[i].moof_offset = offset;
4326  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
4327  offset += size;
4328  pts += duration;
4329  }
4330 
4331  st->duration = sc->track_end = pts;
4332 
4334  c->fragment_index_count + 1,
4335  sizeof(MOVFragmentIndex*));
4336  if (!tmp) {
4337  av_freep(&index->items);
4338  av_freep(&index);
4339  return AVERROR(ENOMEM);
4340  }
4341 
4342  c->fragment_index_data = tmp;
4344  sc->has_sidx = 1;
4345 
4346  if (offset == avio_size(pb)) {
4347  for (i = 0; i < c->fc->nb_streams; i++) {
4348  if (c->fc->streams[i]->id == c->fragment_index_data[0]->track_id) {
4349  ref_st = c->fc->streams[i];
4350  ref_sc = ref_st->priv_data;
4351  break;
4352  }
4353  }
4354  for (i = 0; i < c->fc->nb_streams; i++) {
4355  st = c->fc->streams[i];
4356  sc = st->priv_data;
4357  if (!sc->has_sidx) {
4358  st->duration = sc->track_end = av_rescale(ref_st->duration, sc->time_scale, ref_sc->time_scale);
4359  }
4360  }
4361 
4362  c->fragment_index_complete = 1;
4363  }
4364 
4365  return 0;
4366 }
4367 
4368 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
4369 /* like the files created with Adobe Premiere 5.0, for samples see */
4370 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
4372 {
4373  int err;
4374 
4375  if (atom.size < 8)
4376  return 0; /* continue */
4377  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
4378  avio_skip(pb, atom.size - 4);
4379  return 0;
4380  }
4381  atom.type = avio_rl32(pb);
4382  atom.size -= 8;
4383  if (atom.type != MKTAG('m','d','a','t')) {
4384  avio_skip(pb, atom.size);
4385  return 0;
4386  }
4387  err = mov_read_mdat(c, pb, atom);
4388  return err;
4389 }
4390 
4392 {
4393 #if CONFIG_ZLIB
4394  AVIOContext ctx;
4395  uint8_t *cmov_data;
4396  uint8_t *moov_data; /* uncompressed data */
4397  long cmov_len, moov_len;
4398  int ret = -1;
4399 
4400  avio_rb32(pb); /* dcom atom */
4401  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
4402  return AVERROR_INVALIDDATA;
4403  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
4404  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
4405  return AVERROR_INVALIDDATA;
4406  }
4407  avio_rb32(pb); /* cmvd atom */
4408  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
4409  return AVERROR_INVALIDDATA;
4410  moov_len = avio_rb32(pb); /* uncompressed size */
4411  cmov_len = atom.size - 6 * 4;
4412 
4413  cmov_data = av_malloc(cmov_len);
4414  if (!cmov_data)
4415  return AVERROR(ENOMEM);
4416  moov_data = av_malloc(moov_len);
4417  if (!moov_data) {
4418  av_free(cmov_data);
4419  return AVERROR(ENOMEM);
4420  }
4421  ret = ffio_read_size(pb, cmov_data, cmov_len);
4422  if (ret < 0)
4423  goto free_and_return;
4424 
4425  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
4426  goto free_and_return;
4427  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
4428  goto free_and_return;
4430  atom.type = MKTAG('m','o','o','v');
4431  atom.size = moov_len;
4432  ret = mov_read_default(c, &ctx, atom);
4433 free_and_return:
4434  av_free(moov_data);
4435  av_free(cmov_data);
4436  return ret;
4437 #else
4438  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
4439  return AVERROR(ENOSYS);
4440 #endif
4441 }
4442 
4443 /* edit list atom */
4445 {
4446  MOVStreamContext *sc;
4447  int i, edit_count, version;
4448 
4449  if (c->fc->nb_streams < 1 || c->ignore_editlist)
4450  return 0;
4451  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
4452 
4453  version = avio_r8(pb); /* version */
4454  avio_rb24(pb); /* flags */
4455  edit_count = avio_rb32(pb); /* entries */
4456 
4457  if (!edit_count)
4458  return 0;
4459  if (sc->elst_data)
4460  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
4461  av_free(sc->elst_data);
4462  sc->elst_count = 0;
4463  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
4464  if (!sc->elst_data)
4465  return AVERROR(ENOMEM);
4466 
4467  av_log(c->fc, AV_LOG_TRACE, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
4468  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
4469  MOVElst *e = &sc->elst_data[i];
4470 
4471  if (version == 1) {
4472  e->duration = avio_rb64(pb);
4473  e->time = avio_rb64(pb);
4474  } else {
4475  e->duration = avio_rb32(pb); /* segment duration */
4476  e->time = (int32_t)avio_rb32(pb); /* media time */
4477  }
4478  e->rate = avio_rb32(pb) / 65536.0;
4479  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
4480  e->duration, e->time, e->rate);
4481 
4482  if (e->time < 0 && e->time != -1 &&
4484  av_log(c->fc, AV_LOG_ERROR, "Track %d, edit %d: Invalid edit list media time=%"PRId64"\n",
4485  c->fc->nb_streams-1, i, e->time);
4486  return AVERROR_INVALIDDATA;
4487  }
4488  }
4489  sc->elst_count = i;
4490 
4491  return 0;
4492 }
4493 
4495 {
4496  MOVStreamContext *sc;
4497 
4498  if (c->fc->nb_streams < 1)
4499  return AVERROR_INVALIDDATA;
4500  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4501  sc->timecode_track = avio_rb32(pb);
4502  return 0;
4503 }
4504 
4506 {
4507  AVStream *st;
4508  MOVStreamContext *sc;
4509  enum AVStereo3DType type;
4510  int mode;
4511 
4512  if (c->fc->nb_streams < 1)
4513  return 0;
4514 
4515  st = c->fc->streams[c->fc->nb_streams - 1];
4516  sc = st->priv_data;
4517 
4518  if (atom.size < 5) {
4519  av_log(c->fc, AV_LOG_ERROR, "Empty stereoscopic video box\n");
4520  return AVERROR_INVALIDDATA;
4521  }
4522  avio_skip(pb, 4); /* version + flags */
4523 
4524  mode = avio_r8(pb);
4525  switch (mode) {
4526  case 0:
4527  type = AV_STEREO3D_2D;
4528  break;
4529  case 1:
4530  type = AV_STEREO3D_TOPBOTTOM;
4531  break;
4532  case 2:
4533  type = AV_STEREO3D_SIDEBYSIDE;
4534  break;
4535  default:
4536  av_log(c->fc, AV_LOG_WARNING, "Unknown st3d mode value %d\n", mode);
4537  return 0;
4538  }
4539 
4540  sc->stereo3d = av_stereo3d_alloc();
4541  if (!sc->stereo3d)
4542  return AVERROR(ENOMEM);
4543 
4544  sc->stereo3d->type = type;
4545  return 0;
4546 }
4547 
4549 {
4550  AVStream *st;
4551  MOVStreamContext *sc;
4552  int size;
4553  int32_t yaw, pitch, roll;
4554  uint32_t tag;
4555  enum AVSphericalProjection projection;
4556 
4557  if (c->fc->nb_streams < 1)
4558  return 0;
4559 
4560  st = c->fc->streams[c->fc->nb_streams - 1];
4561  sc = st->priv_data;
4562 
4563  if (atom.size < 8) {
4564  av_log(c->fc, AV_LOG_ERROR, "Empty spherical video box\n");
4565  return AVERROR_INVALIDDATA;
4566  }
4567 
4568  size = avio_rb32(pb);
4569  if (size > atom.size)
4570  return AVERROR_INVALIDDATA;
4571 
4572  tag = avio_rl32(pb);
4573  if (tag != MKTAG('s','v','h','d')) {
4574  av_log(c->fc, AV_LOG_ERROR, "Missing spherical video header\n");
4575  return 0;
4576  }
4577  avio_skip(pb, 4); /* version + flags */
4578  avio_skip(pb, avio_r8(pb)); /* metadata_source */
4579 
4580  size = avio_rb32(pb);
4581  if (size > atom.size)
4582  return AVERROR_INVALIDDATA;
4583 
4584  tag = avio_rl32(pb);
4585  if (tag != MKTAG('p','r','o','j')) {
4586  av_log(c->fc, AV_LOG_ERROR, "Missing projection box\n");
4587  return 0;
4588  }
4589 
4590  size = avio_rb32(pb);
4591  if (size > atom.size)
4592  return AVERROR_INVALIDDATA;
4593 
4594  tag = avio_rl32(pb);
4595  if (tag != MKTAG('p','r','h','d')) {
4596  av_log(c->fc, AV_LOG_ERROR, "Missing projection header box\n");
4597  return 0;
4598  }
4599  avio_skip(pb, 4); /* version + flags */
4600 
4601  /* 16.16 fixed point */
4602  yaw = avio_rb32(pb);
4603  pitch = avio_rb32(pb);
4604  roll = avio_rb32(pb);
4605 
4606  size = avio_rb32(pb);
4607  if (size > atom.size)
4608  return AVERROR_INVALIDDATA;
4609 
4610  tag = avio_rl32(pb);
4611  avio_skip(pb, 4); /* version + flags */
4612  switch (tag) {
4613  case MKTAG('c','b','m','p'):
4614  projection = AV_SPHERICAL_CUBEMAP;
4615  break;
4616  case MKTAG('e','q','u','i'):
4617  projection = AV_SPHERICAL_EQUIRECTANGULAR;
4618  break;
4619  default:
4620  av_log(c->fc, AV_LOG_ERROR, "Unknown projection type\n");
4621  return 0;
4622  }
4623 
4625  if (!sc->spherical)
4626  return AVERROR(ENOMEM);
4627 
4628  sc->spherical->projection = projection;
4629 
4630  sc->spherical->yaw = yaw;
4631  sc->spherical->pitch = pitch;
4632  sc->spherical->roll = roll;
4633 
4634  return 0;
4635 }
4636 
4638 {
4639  int ret = 0;
4640  uint8_t *buffer = av_malloc(len + 1);
4641  const char *val;
4642 
4643  if (!buffer)
4644  return AVERROR(ENOMEM);
4645  buffer[len] = '\0';
4646 
4647  ret = ffio_read_size(pb, buffer, len);
4648  if (ret < 0)
4649  goto out;
4650 
4651  /* Check for mandatory keys and values, try to support XML as best-effort */
4652  if (av_stristr(buffer, "<GSpherical:StitchingSoftware>") &&
4653  (val = av_stristr(buffer, "<GSpherical:Spherical>")) &&
4654  av_stristr(val, "true") &&
4655  (val = av_stristr(buffer, "<GSpherical:Stitched>")) &&
4656  av_stristr(val, "true") &&
4657  (val = av_stristr(buffer, "<GSpherical:ProjectionType>")) &&
4658  av_stristr(val, "equirectangular")) {
4660  if (!sc->spherical)
4661  goto out;
4662 
4664 
4665  if (av_stristr(buffer, "<GSpherical:StereoMode>")) {
4666  enum AVStereo3DType mode;
4667 
4668  if (av_stristr(buffer, "left-right"))
4669  mode = AV_STEREO3D_SIDEBYSIDE;
4670  else if (av_stristr(buffer, "top-bottom"))
4671  mode = AV_STEREO3D_TOPBOTTOM;
4672  else
4673  mode = AV_STEREO3D_2D;
4674 
4675  sc->stereo3d = av_stereo3d_alloc();
4676  if (!sc->stereo3d)
4677  goto out;
4678 
4679  sc->stereo3d->type = mode;
4680  }
4681 
4682  /* orientation */
4683  val = av_stristr(buffer, "<GSpherical:InitialViewHeadingDegrees>");
4684  if (val)
4685  sc->spherical->yaw = strtol(val, NULL, 10) * (1 << 16);
4686  val = av_stristr(buffer, "<GSpherical:InitialViewPitchDegrees>");
4687  if (val)
4688  sc->spherical->pitch = strtol(val, NULL, 10) * (1 << 16);
4689  val = av_stristr(buffer, "<GSpherical:InitialViewRollDegrees>");
4690  if (val)
4691  sc->spherical->roll = strtol(val, NULL, 10) * (1 << 16);
4692  }
4693 
4694 out:
4695  av_free(buffer);
4696  return ret;
4697 }
4698 
4700 {
4701  AVStream *st;
4702  MOVStreamContext *sc;
4703  int ret;
4704  uint8_t uuid[16];
4705  static