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mov.c
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1 /*
2  * MOV demuxer
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5  *
6  * first version by Francois Revol <revol@free.fr>
7  * seek function by Gael Chardon <gael.dev@4now.net>
8  *
9  * This file is part of FFmpeg.
10  *
11  * FFmpeg is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * FFmpeg is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with FFmpeg; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
26 #include <inttypes.h>
27 #include <limits.h>
28 #include <stdint.h>
29 
30 #include "libavutil/attributes.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/intfloat.h"
35 #include "libavutil/mathematics.h"
37 #include "libavutil/avassert.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/dict.h"
40 #include "libavutil/display.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/aes.h"
43 #include "libavutil/aes_ctr.h"
44 #include "libavutil/pixdesc.h"
45 #include "libavutil/sha.h"
46 #include "libavutil/spherical.h"
47 #include "libavutil/stereo3d.h"
48 #include "libavutil/timecode.h"
49 #include "libavcodec/ac3tab.h"
50 #include "libavcodec/flac.h"
52 #include "avformat.h"
53 #include "internal.h"
54 #include "avio_internal.h"
55 #include "riff.h"
56 #include "isom.h"
57 #include "libavcodec/get_bits.h"
58 #include "id3v1.h"
59 #include "mov_chan.h"
60 #include "replaygain.h"
61 
62 #if CONFIG_ZLIB
63 #include <zlib.h>
64 #endif
65 
66 #include "qtpalette.h"
67 
68 /* those functions parse an atom */
69 /* links atom IDs to parse functions */
70 typedef struct MOVParseTableEntry {
71  uint32_t type;
74 
75 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
76 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
77 static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
78  int count, int duration);
79 
81  unsigned len, const char *key)
82 {
83  char buf[16];
84 
85  short current, total = 0;
86  avio_rb16(pb); // unknown
87  current = avio_rb16(pb);
88  if (len >= 6)
89  total = avio_rb16(pb);
90  if (!total)
91  snprintf(buf, sizeof(buf), "%d", current);
92  else
93  snprintf(buf, sizeof(buf), "%d/%d", current, total);
95  av_dict_set(&c->fc->metadata, key, buf, 0);
96 
97  return 0;
98 }
99 
101  unsigned len, const char *key)
102 {
103  /* bypass padding bytes */
104  avio_r8(pb);
105  avio_r8(pb);
106  avio_r8(pb);
107 
109  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
110 
111  return 0;
112 }
113 
115  unsigned len, const char *key)
116 {
118  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
119 
120  return 0;
121 }
122 
124  unsigned len, const char *key)
125 {
126  short genre;
127 
128  avio_r8(pb); // unknown
129 
130  genre = avio_r8(pb);
131  if (genre < 1 || genre > ID3v1_GENRE_MAX)
132  return 0;
134  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
135 
136  return 0;
137 }
138 
139 static const uint32_t mac_to_unicode[128] = {
140  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
141  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
142  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
143  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
144  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
145  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
146  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
147  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
148  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
149  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
150  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
151  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
152  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
153  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
154  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
155  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
156 };
157 
159  char *dst, int dstlen)
160 {
161  char *p = dst;
162  char *end = dst+dstlen-1;
163  int i;
164 
165  for (i = 0; i < len; i++) {
166  uint8_t t, c = avio_r8(pb);
167 
168  if (p >= end)
169  continue;
170 
171  if (c < 0x80)
172  *p++ = c;
173  else if (p < end)
174  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
175  }
176  *p = 0;
177  return p - dst;
178 }
179 
180 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
181 {
182  AVPacket pkt;
183  AVStream *st;
184  MOVStreamContext *sc;
185  enum AVCodecID id;
186  int ret;
187 
188  switch (type) {
189  case 0xd: id = AV_CODEC_ID_MJPEG; break;
190  case 0xe: id = AV_CODEC_ID_PNG; break;
191  case 0x1b: id = AV_CODEC_ID_BMP; break;
192  default:
193  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
194  avio_skip(pb, len);
195  return 0;
196  }
197 
198  st = avformat_new_stream(c->fc, NULL);
199  if (!st)
200  return AVERROR(ENOMEM);
201  sc = av_mallocz(sizeof(*sc));
202  if (!sc)
203  return AVERROR(ENOMEM);
204  st->priv_data = sc;
205 
206  ret = av_get_packet(pb, &pkt, len);
207  if (ret < 0)
208  return ret;
209 
210  if (pkt.size >= 8 && id != AV_CODEC_ID_BMP) {
211  if (AV_RB64(pkt.data) == 0x89504e470d0a1a0a) {
212  id = AV_CODEC_ID_PNG;
213  } else {
214  id = AV_CODEC_ID_MJPEG;
215  }
216  }
217 
219 
220  st->attached_pic = pkt;
221  st->attached_pic.stream_index = st->index;
223 
225  st->codecpar->codec_id = id;
226 
227  return 0;
228 }
229 
230 // 3GPP TS 26.244
231 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
232 {
233  char language[4] = { 0 };
234  char buf[200], place[100];
235  uint16_t langcode = 0;
236  double longitude, latitude, altitude;
237  const char *key = "location";
238 
239  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
240  av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
241  return AVERROR_INVALIDDATA;
242  }
243 
244  avio_skip(pb, 4); // version+flags
245  langcode = avio_rb16(pb);
246  ff_mov_lang_to_iso639(langcode, language);
247  len -= 6;
248 
249  len -= avio_get_str(pb, len, place, sizeof(place));
250  if (len < 1) {
251  av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
252  return AVERROR_INVALIDDATA;
253  }
254  avio_skip(pb, 1); // role
255  len -= 1;
256 
257  if (len < 12) {
258  av_log(c->fc, AV_LOG_ERROR,
259  "loci too short (%u bytes left, need at least %d)\n", len, 12);
260  return AVERROR_INVALIDDATA;
261  }
262  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
263  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
264  altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
265 
266  // Try to output in the same format as the ?xyz field
267  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
268  if (altitude)
269  av_strlcatf(buf, sizeof(buf), "%+f", altitude);
270  av_strlcatf(buf, sizeof(buf), "/%s", place);
271 
272  if (*language && strcmp(language, "und")) {
273  char key2[16];
274  snprintf(key2, sizeof(key2), "%s-%s", key, language);
275  av_dict_set(&c->fc->metadata, key2, buf, 0);
276  }
278  return av_dict_set(&c->fc->metadata, key, buf, 0);
279 }
280 
281 static int mov_metadata_hmmt(MOVContext *c, AVIOContext *pb, unsigned len)
282 {
283  int i, n_hmmt;
284 
285  if (len < 2)
286  return 0;
287  if (c->ignore_chapters)
288  return 0;
289 
290  n_hmmt = avio_rb32(pb);
291  for (i = 0; i < n_hmmt && !pb->eof_reached; i++) {
292  int moment_time = avio_rb32(pb);
293  avpriv_new_chapter(c->fc, i, av_make_q(1, 1000), moment_time, AV_NOPTS_VALUE, NULL);
294  }
295  return 0;
296 }
297 
299 {
300  char tmp_key[5];
301  char key2[32], language[4] = {0};
302  char *str = NULL;
303  const char *key = NULL;
304  uint16_t langcode = 0;
305  uint32_t data_type = 0, str_size, str_size_alloc;
306  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
307  int raw = 0;
308  int num = 0;
309 
310  switch (atom.type) {
311  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
312  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
313  case MKTAG( 'X','M','P','_'):
314  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
315  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
316  case MKTAG( 'a','k','I','D'): key = "account_type";
318  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
319  case MKTAG( 'c','a','t','g'): key = "category"; break;
320  case MKTAG( 'c','p','i','l'): key = "compilation";
322  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
323  case MKTAG( 'd','e','s','c'): key = "description"; break;
324  case MKTAG( 'd','i','s','k'): key = "disc";
326  case MKTAG( 'e','g','i','d'): key = "episode_uid";
328  case MKTAG( 'F','I','R','M'): key = "firmware"; raw = 1; break;
329  case MKTAG( 'g','n','r','e'): key = "genre";
330  parse = mov_metadata_gnre; break;
331  case MKTAG( 'h','d','v','d'): key = "hd_video";
333  case MKTAG( 'H','M','M','T'):
334  return mov_metadata_hmmt(c, pb, atom.size);
335  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
336  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
337  case MKTAG( 'l','o','c','i'):
338  return mov_metadata_loci(c, pb, atom.size);
339  case MKTAG( 'p','c','s','t'): key = "podcast";
341  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
343  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
344  case MKTAG( 'r','t','n','g'): key = "rating";
346  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
347  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
348  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
349  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
350  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
351  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
352  case MKTAG( 's','t','i','k'): key = "media_type";
354  case MKTAG( 't','r','k','n'): key = "track";
356  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
357  case MKTAG( 't','v','e','s'): key = "episode_sort";
359  case MKTAG( 't','v','n','n'): key = "network"; break;
360  case MKTAG( 't','v','s','h'): key = "show"; break;
361  case MKTAG( 't','v','s','n'): key = "season_number";
363  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
364  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
365  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
366  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
367  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
368  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
369  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
370  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
371  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
372  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
373  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
374  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
375  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
376  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
377  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
378  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
379  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
380  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
381  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
382  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
383  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
384  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
385  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
386  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
387  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
388  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
389  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
390  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
391  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
392  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
393  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
394  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
395  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
396  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
397  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
398  }
399 retry:
400  if (c->itunes_metadata && atom.size > 8) {
401  int data_size = avio_rb32(pb);
402  int tag = avio_rl32(pb);
403  if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
404  data_type = avio_rb32(pb); // type
405  avio_rb32(pb); // unknown
406  str_size = data_size - 16;
407  atom.size -= 16;
408 
409  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
410  int ret = mov_read_covr(c, pb, data_type, str_size);
411  if (ret < 0) {
412  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
413  }
414  return ret;
415  } else if (!key && c->found_hdlr_mdta && c->meta_keys) {
416  uint32_t index = AV_RB32(&atom.type);
417  if (index < c->meta_keys_count && index > 0) {
418  key = c->meta_keys[index];
419  } else {
421  "The index of 'data' is out of range: %"PRId32" < 1 or >= %d.\n",
422  index, c->meta_keys_count);
423  }
424  }
425  } else return 0;
426  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
427  str_size = avio_rb16(pb); // string length
428  if (str_size > atom.size) {
429  raw = 1;
430  avio_seek(pb, -2, SEEK_CUR);
431  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
432  goto retry;
433  }
434  langcode = avio_rb16(pb);
435  ff_mov_lang_to_iso639(langcode, language);
436  atom.size -= 4;
437  } else
438  str_size = atom.size;
439 
440  if (c->export_all && !key) {
441  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
442  key = tmp_key;
443  }
444 
445  if (!key)
446  return 0;
447  if (atom.size < 0 || str_size >= INT_MAX/2)
448  return AVERROR_INVALIDDATA;
449 
450  // Allocates enough space if data_type is a int32 or float32 number, otherwise
451  // worst-case requirement for output string in case of utf8 coded input
452  num = (data_type >= 21 && data_type <= 23);
453  str_size_alloc = (num ? 512 : (raw ? str_size : str_size * 2)) + 1;
454  str = av_mallocz(str_size_alloc);
455  if (!str)
456  return AVERROR(ENOMEM);
457 
458  if (parse)
459  parse(c, pb, str_size, key);
460  else {
461  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
462  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
463  } else if (data_type == 21) { // BE signed integer, variable size
464  int val = 0;
465  if (str_size == 1)
466  val = (int8_t)avio_r8(pb);
467  else if (str_size == 2)
468  val = (int16_t)avio_rb16(pb);
469  else if (str_size == 3)
470  val = ((int32_t)(avio_rb24(pb)<<8))>>8;
471  else if (str_size == 4)
472  val = (int32_t)avio_rb32(pb);
473  if (snprintf(str, str_size_alloc, "%d", val) >= str_size_alloc) {
474  av_log(c->fc, AV_LOG_ERROR,
475  "Failed to store the number (%d) in string.\n", val);
476  av_free(str);
477  return AVERROR_INVALIDDATA;
478  }
479  } else if (data_type == 22) { // BE unsigned integer, variable size
480  unsigned int val = 0;
481  if (str_size == 1)
482  val = avio_r8(pb);
483  else if (str_size == 2)
484  val = avio_rb16(pb);
485  else if (str_size == 3)
486  val = avio_rb24(pb);
487  else if (str_size == 4)
488  val = avio_rb32(pb);
489  if (snprintf(str, str_size_alloc, "%u", val) >= str_size_alloc) {
490  av_log(c->fc, AV_LOG_ERROR,
491  "Failed to store the number (%u) in string.\n", val);
492  av_free(str);
493  return AVERROR_INVALIDDATA;
494  }
495  } else if (data_type == 23 && str_size >= 4) { // BE float32
496  float val = av_int2float(avio_rb32(pb));
497  if (snprintf(str, str_size_alloc, "%f", val) >= str_size_alloc) {
498  av_log(c->fc, AV_LOG_ERROR,
499  "Failed to store the float32 number (%f) in string.\n", val);
500  av_free(str);
501  return AVERROR_INVALIDDATA;
502  }
503  } else {
504  int ret = ffio_read_size(pb, str, str_size);
505  if (ret < 0) {
506  av_free(str);
507  return ret;
508  }
509  str[str_size] = 0;
510  }
512  av_dict_set(&c->fc->metadata, key, str, 0);
513  if (*language && strcmp(language, "und")) {
514  snprintf(key2, sizeof(key2), "%s-%s", key, language);
515  av_dict_set(&c->fc->metadata, key2, str, 0);
516  }
517  if (!strcmp(key, "encoder")) {
518  int major, minor, micro;
519  if (sscanf(str, "HandBrake %d.%d.%d", &major, &minor, &micro) == 3) {
520  c->handbrake_version = 1000000*major + 1000*minor + micro;
521  }
522  }
523  }
524 
525  av_freep(&str);
526  return 0;
527 }
528 
530 {
531  int64_t start;
532  int i, nb_chapters, str_len, version;
533  char str[256+1];
534  int ret;
535 
536  if (c->ignore_chapters)
537  return 0;
538 
539  if ((atom.size -= 5) < 0)
540  return 0;
541 
542  version = avio_r8(pb);
543  avio_rb24(pb);
544  if (version)
545  avio_rb32(pb); // ???
546  nb_chapters = avio_r8(pb);
547 
548  for (i = 0; i < nb_chapters; i++) {
549  if (atom.size < 9)
550  return 0;
551 
552  start = avio_rb64(pb);
553  str_len = avio_r8(pb);
554 
555  if ((atom.size -= 9+str_len) < 0)
556  return 0;
557 
558  ret = ffio_read_size(pb, str, str_len);
559  if (ret < 0)
560  return ret;
561  str[str_len] = 0;
562  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
563  }
564  return 0;
565 }
566 
567 #define MIN_DATA_ENTRY_BOX_SIZE 12
569 {
570  AVStream *st;
571  MOVStreamContext *sc;
572  int entries, i, j;
573 
574  if (c->fc->nb_streams < 1)
575  return 0;
576  st = c->fc->streams[c->fc->nb_streams-1];
577  sc = st->priv_data;
578 
579  avio_rb32(pb); // version + flags
580  entries = avio_rb32(pb);
581  if (!entries ||
582  entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
583  entries >= UINT_MAX / sizeof(*sc->drefs))
584  return AVERROR_INVALIDDATA;
585  sc->drefs_count = 0;
586  av_free(sc->drefs);
587  sc->drefs_count = 0;
588  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
589  if (!sc->drefs)
590  return AVERROR(ENOMEM);
591  sc->drefs_count = entries;
592 
593  for (i = 0; i < entries; i++) {
594  MOVDref *dref = &sc->drefs[i];
595  uint32_t size = avio_rb32(pb);
596  int64_t next = avio_tell(pb) + size - 4;
597 
598  if (size < 12)
599  return AVERROR_INVALIDDATA;
600 
601  dref->type = avio_rl32(pb);
602  avio_rb32(pb); // version + flags
603 
604  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
605  /* macintosh alias record */
606  uint16_t volume_len, len;
607  int16_t type;
608  int ret;
609 
610  avio_skip(pb, 10);
611 
612  volume_len = avio_r8(pb);
613  volume_len = FFMIN(volume_len, 27);
614  ret = ffio_read_size(pb, dref->volume, 27);
615  if (ret < 0)
616  return ret;
617  dref->volume[volume_len] = 0;
618  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
619 
620  avio_skip(pb, 12);
621 
622  len = avio_r8(pb);
623  len = FFMIN(len, 63);
624  ret = ffio_read_size(pb, dref->filename, 63);
625  if (ret < 0)
626  return ret;
627  dref->filename[len] = 0;
628  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
629 
630  avio_skip(pb, 16);
631 
632  /* read next level up_from_alias/down_to_target */
633  dref->nlvl_from = avio_rb16(pb);
634  dref->nlvl_to = avio_rb16(pb);
635  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
636  dref->nlvl_from, dref->nlvl_to);
637 
638  avio_skip(pb, 16);
639 
640  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
641  if(avio_feof(pb))
642  return AVERROR_EOF;
643  type = avio_rb16(pb);
644  len = avio_rb16(pb);
645  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
646  if (len&1)
647  len += 1;
648  if (type == 2) { // absolute path
649  av_free(dref->path);
650  dref->path = av_mallocz(len+1);
651  if (!dref->path)
652  return AVERROR(ENOMEM);
653 
654  ret = ffio_read_size(pb, dref->path, len);
655  if (ret < 0) {
656  av_freep(&dref->path);
657  return ret;
658  }
659  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
660  len -= volume_len;
661  memmove(dref->path, dref->path+volume_len, len);
662  dref->path[len] = 0;
663  }
664  // trim string of any ending zeros
665  for (j = len - 1; j >= 0; j--) {
666  if (dref->path[j] == 0)
667  len--;
668  else
669  break;
670  }
671  for (j = 0; j < len; j++)
672  if (dref->path[j] == ':' || dref->path[j] == 0)
673  dref->path[j] = '/';
674  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
675  } else if (type == 0) { // directory name
676  av_free(dref->dir);
677  dref->dir = av_malloc(len+1);
678  if (!dref->dir)
679  return AVERROR(ENOMEM);
680 
681  ret = ffio_read_size(pb, dref->dir, len);
682  if (ret < 0) {
683  av_freep(&dref->dir);
684  return ret;
685  }
686  dref->dir[len] = 0;
687  for (j = 0; j < len; j++)
688  if (dref->dir[j] == ':')
689  dref->dir[j] = '/';
690  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
691  } else
692  avio_skip(pb, len);
693  }
694  } else {
695  av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x%08"PRIx32" size %"PRIu32"\n",
696  dref->type, size);
697  entries--;
698  i--;
699  }
700  avio_seek(pb, next, SEEK_SET);
701  }
702  return 0;
703 }
704 
706 {
707  AVStream *st;
708  uint32_t type;
709  uint32_t ctype;
710  int64_t title_size;
711  char *title_str;
712  int ret;
713 
714  avio_r8(pb); /* version */
715  avio_rb24(pb); /* flags */
716 
717  /* component type */
718  ctype = avio_rl32(pb);
719  type = avio_rl32(pb); /* component subtype */
720 
721  av_log(c->fc, AV_LOG_TRACE, "ctype=%s\n", av_fourcc2str(ctype));
722  av_log(c->fc, AV_LOG_TRACE, "stype=%s\n", av_fourcc2str(type));
723 
724  if (c->trak_index < 0) { // meta not inside a trak
725  if (type == MKTAG('m','d','t','a')) {
726  c->found_hdlr_mdta = 1;
727  }
728  return 0;
729  }
730 
731  st = c->fc->streams[c->fc->nb_streams-1];
732 
733  if (type == MKTAG('v','i','d','e'))
735  else if (type == MKTAG('s','o','u','n'))
737  else if (type == MKTAG('m','1','a',' '))
739  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
741 
742  avio_rb32(pb); /* component manufacture */
743  avio_rb32(pb); /* component flags */
744  avio_rb32(pb); /* component flags mask */
745 
746  title_size = atom.size - 24;
747  if (title_size > 0) {
748  if (title_size > FFMIN(INT_MAX, SIZE_MAX-1))
749  return AVERROR_INVALIDDATA;
750  title_str = av_malloc(title_size + 1); /* Add null terminator */
751  if (!title_str)
752  return AVERROR(ENOMEM);
753 
754  ret = ffio_read_size(pb, title_str, title_size);
755  if (ret < 0) {
756  av_freep(&title_str);
757  return ret;
758  }
759  title_str[title_size] = 0;
760  if (title_str[0]) {
761  int off = (!c->isom && title_str[0] == title_size - 1);
762  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
763  }
764  av_freep(&title_str);
765  }
766 
767  return 0;
768 }
769 
771 {
772  AVStream *st;
773  int tag;
774 
775  if (fc->nb_streams < 1)
776  return 0;
777  st = fc->streams[fc->nb_streams-1];
778 
779  avio_rb32(pb); /* version + flags */
780  ff_mp4_read_descr(fc, pb, &tag);
781  if (tag == MP4ESDescrTag) {
783  } else
784  avio_rb16(pb); /* ID */
785 
786  ff_mp4_read_descr(fc, pb, &tag);
787  if (tag == MP4DecConfigDescrTag)
788  ff_mp4_read_dec_config_descr(fc, st, pb);
789  return 0;
790 }
791 
793 {
794  return ff_mov_read_esds(c->fc, pb);
795 }
796 
798 {
799  AVStream *st;
800  enum AVAudioServiceType *ast;
801  int ac3info, acmod, lfeon, bsmod;
802 
803  if (c->fc->nb_streams < 1)
804  return 0;
805  st = c->fc->streams[c->fc->nb_streams-1];
806 
808  sizeof(*ast));
809  if (!ast)
810  return AVERROR(ENOMEM);
811 
812  ac3info = avio_rb24(pb);
813  bsmod = (ac3info >> 14) & 0x7;
814  acmod = (ac3info >> 11) & 0x7;
815  lfeon = (ac3info >> 10) & 0x1;
816  st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
818  if (lfeon)
820  *ast = bsmod;
821  if (st->codecpar->channels > 1 && bsmod == 0x7)
823 
824 #if FF_API_LAVF_AVCTX
826  st->codec->audio_service_type = *ast;
828 #endif
829 
830  return 0;
831 }
832 
834 {
835  AVStream *st;
836  enum AVAudioServiceType *ast;
837  int eac3info, acmod, lfeon, bsmod;
838 
839  if (c->fc->nb_streams < 1)
840  return 0;
841  st = c->fc->streams[c->fc->nb_streams-1];
842 
844  sizeof(*ast));
845  if (!ast)
846  return AVERROR(ENOMEM);
847 
848  /* No need to parse fields for additional independent substreams and its
849  * associated dependent substreams since libavcodec's E-AC-3 decoder
850  * does not support them yet. */
851  avio_rb16(pb); /* data_rate and num_ind_sub */
852  eac3info = avio_rb24(pb);
853  bsmod = (eac3info >> 12) & 0x1f;
854  acmod = (eac3info >> 9) & 0x7;
855  lfeon = (eac3info >> 8) & 0x1;
857  if (lfeon)
860  *ast = bsmod;
861  if (st->codecpar->channels > 1 && bsmod == 0x7)
863 
864 #if FF_API_LAVF_AVCTX
866  st->codec->audio_service_type = *ast;
868 #endif
869 
870  return 0;
871 }
872 
874 {
875  const uint32_t ddts_size = 20;
876  AVStream *st = NULL;
877  uint8_t *buf = NULL;
878  uint32_t frame_duration_code = 0;
879  uint32_t channel_layout_code = 0;
880  GetBitContext gb;
881 
882  buf = av_malloc(ddts_size + AV_INPUT_BUFFER_PADDING_SIZE);
883  if (!buf) {
884  return AVERROR(ENOMEM);
885  }
886  if (avio_read(pb, buf, ddts_size) < ddts_size) {
887  av_free(buf);
888  return AVERROR_INVALIDDATA;
889  }
890 
891  init_get_bits(&gb, buf, 8*ddts_size);
892 
893  if (c->fc->nb_streams < 1) {
894  av_free(buf);
895  return 0;
896  }
897  st = c->fc->streams[c->fc->nb_streams-1];
898 
899  st->codecpar->sample_rate = get_bits_long(&gb, 32);
900  if (st->codecpar->sample_rate <= 0) {
901  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
902  av_free(buf);
903  return AVERROR_INVALIDDATA;
904  }
905  skip_bits_long(&gb, 32); /* max bitrate */
906  st->codecpar->bit_rate = get_bits_long(&gb, 32);
907  st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
908  frame_duration_code = get_bits(&gb, 2);
909  skip_bits(&gb, 30); /* various fields */
910  channel_layout_code = get_bits(&gb, 16);
911 
912  st->codecpar->frame_size =
913  (frame_duration_code == 0) ? 512 :
914  (frame_duration_code == 1) ? 1024 :
915  (frame_duration_code == 2) ? 2048 :
916  (frame_duration_code == 3) ? 4096 : 0;
917 
918  if (channel_layout_code > 0xff) {
919  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
920  }
921  st->codecpar->channel_layout =
922  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
923  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
924  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
925  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
926  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
927  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
928 
930  av_free(buf);
931 
932  return 0;
933 }
934 
936 {
937  AVStream *st;
938 
939  if (c->fc->nb_streams < 1)
940  return 0;
941  st = c->fc->streams[c->fc->nb_streams-1];
942 
943  if (atom.size < 16)
944  return 0;
945 
946  /* skip version and flags */
947  avio_skip(pb, 4);
948 
949  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
950 
951  return 0;
952 }
953 
955 {
956  AVStream *st;
957  int ret;
958 
959  if (c->fc->nb_streams < 1)
960  return 0;
961  st = c->fc->streams[c->fc->nb_streams-1];
962 
963  if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
964  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
965 
966  return ret;
967 }
968 
970 {
971  const int num = avio_rb32(pb);
972  const int den = avio_rb32(pb);
973  AVStream *st;
974 
975  if (c->fc->nb_streams < 1)
976  return 0;
977  st = c->fc->streams[c->fc->nb_streams-1];
978 
979  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
980  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
982  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
984  num, den);
985  } else if (den != 0) {
987  num, den, 32767);
988  }
989  return 0;
990 }
991 
992 /* this atom contains actual media data */
994 {
995  if (atom.size == 0) /* wrong one (MP4) */
996  return 0;
997  c->found_mdat=1;
998  return 0; /* now go for moov */
999 }
1000 
1001 #define DRM_BLOB_SIZE 56
1002 
1004 {
1005  uint8_t intermediate_key[20];
1006  uint8_t intermediate_iv[20];
1007  uint8_t input[64];
1008  uint8_t output[64];
1009  uint8_t file_checksum[20];
1010  uint8_t calculated_checksum[20];
1011  struct AVSHA *sha;
1012  int i;
1013  int ret = 0;
1014  uint8_t *activation_bytes = c->activation_bytes;
1015  uint8_t *fixed_key = c->audible_fixed_key;
1016 
1017  c->aax_mode = 1;
1018 
1019  sha = av_sha_alloc();
1020  if (!sha)
1021  return AVERROR(ENOMEM);
1022  c->aes_decrypt = av_aes_alloc();
1023  if (!c->aes_decrypt) {
1024  ret = AVERROR(ENOMEM);
1025  goto fail;
1026  }
1027 
1028  /* drm blob processing */
1029  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
1030  avio_read(pb, input, DRM_BLOB_SIZE);
1031  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
1032  avio_read(pb, file_checksum, 20);
1033 
1034  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
1035  for (i = 0; i < 20; i++)
1036  av_log(c->fc, AV_LOG_INFO, "%02x", file_checksum[i]);
1037  av_log(c->fc, AV_LOG_INFO, "\n");
1038 
1039  /* verify activation data */
1040  if (!activation_bytes) {
1041  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
1042  ret = 0; /* allow ffprobe to continue working on .aax files */
1043  goto fail;
1044  }
1045  if (c->activation_bytes_size != 4) {
1046  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
1047  ret = AVERROR(EINVAL);
1048  goto fail;
1049  }
1050 
1051  /* verify fixed key */
1052  if (c->audible_fixed_key_size != 16) {
1053  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
1054  ret = AVERROR(EINVAL);
1055  goto fail;
1056  }
1057 
1058  /* AAX (and AAX+) key derivation */
1059  av_sha_init(sha, 160);
1060  av_sha_update(sha, fixed_key, 16);
1061  av_sha_update(sha, activation_bytes, 4);
1062  av_sha_final(sha, intermediate_key);
1063  av_sha_init(sha, 160);
1064  av_sha_update(sha, fixed_key, 16);
1065  av_sha_update(sha, intermediate_key, 20);
1066  av_sha_update(sha, activation_bytes, 4);
1067  av_sha_final(sha, intermediate_iv);
1068  av_sha_init(sha, 160);
1069  av_sha_update(sha, intermediate_key, 16);
1070  av_sha_update(sha, intermediate_iv, 16);
1071  av_sha_final(sha, calculated_checksum);
1072  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1073  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1074  ret = AVERROR_INVALIDDATA;
1075  goto fail;
1076  }
1077  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1078  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1079  for (i = 0; i < 4; i++) {
1080  // file data (in output) is stored in big-endian mode
1081  if (activation_bytes[i] != output[3 - i]) { // critical error
1082  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1083  ret = AVERROR_INVALIDDATA;
1084  goto fail;
1085  }
1086  }
1087  memcpy(c->file_key, output + 8, 16);
1088  memcpy(input, output + 26, 16);
1089  av_sha_init(sha, 160);
1090  av_sha_update(sha, input, 16);
1091  av_sha_update(sha, c->file_key, 16);
1092  av_sha_update(sha, fixed_key, 16);
1093  av_sha_final(sha, c->file_iv);
1094 
1095 fail:
1096  av_free(sha);
1097 
1098  return ret;
1099 }
1100 
1101 // Audible AAX (and AAX+) bytestream decryption
1102 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1103 {
1104  int blocks = 0;
1105  unsigned char iv[16];
1106 
1107  memcpy(iv, c->file_iv, 16); // iv is overwritten
1108  blocks = size >> 4; // trailing bytes are not encrypted!
1109  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1110  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1111 
1112  return 0;
1113 }
1114 
1115 /* read major brand, minor version and compatible brands and store them as metadata */
1117 {
1118  uint32_t minor_ver;
1119  int comp_brand_size;
1120  char* comp_brands_str;
1121  uint8_t type[5] = {0};
1122  int ret = ffio_read_size(pb, type, 4);
1123  if (ret < 0)
1124  return ret;
1125 
1126  if (strcmp(type, "qt "))
1127  c->isom = 1;
1128  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1129  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1130  minor_ver = avio_rb32(pb); /* minor version */
1131  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1132 
1133  comp_brand_size = atom.size - 8;
1134  if (comp_brand_size < 0)
1135  return AVERROR_INVALIDDATA;
1136  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1137  if (!comp_brands_str)
1138  return AVERROR(ENOMEM);
1139 
1140  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1141  if (ret < 0) {
1142  av_freep(&comp_brands_str);
1143  return ret;
1144  }
1145  comp_brands_str[comp_brand_size] = 0;
1146  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1147  av_freep(&comp_brands_str);
1148 
1149  return 0;
1150 }
1151 
1152 /* this atom should contain all header atoms */
1154 {
1155  int ret;
1156 
1157  if (c->found_moov) {
1158  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1159  avio_skip(pb, atom.size);
1160  return 0;
1161  }
1162 
1163  if ((ret = mov_read_default(c, pb, atom)) < 0)
1164  return ret;
1165  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1166  /* so we don't parse the whole file if over a network */
1167  c->found_moov=1;
1168  return 0; /* now go for mdat */
1169 }
1170 
1172 {
1173  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1174  c->has_looked_for_mfra = 1;
1175  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1176  int ret;
1177  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1178  "for a mfra\n");
1179  if ((ret = mov_read_mfra(c, pb)) < 0) {
1180  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1181  "read the mfra (may be a live ismv)\n");
1182  }
1183  } else {
1184  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1185  "seekable, can not look for mfra\n");
1186  }
1187  }
1189  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1190  return mov_read_default(c, pb, atom);
1191 }
1192 
1193 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1194 {
1195  if (time) {
1196  if(time >= 2082844800)
1197  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1198 
1199  if ((int64_t)(time * 1000000ULL) / 1000000 != time) {
1200  av_log(NULL, AV_LOG_DEBUG, "creation_time is not representable\n");
1201  return;
1202  }
1203 
1204  avpriv_dict_set_timestamp(metadata, "creation_time", time * 1000000);
1205  }
1206 }
1207 
1209 {
1210  AVStream *st;
1211  MOVStreamContext *sc;
1212  int version;
1213  char language[4] = {0};
1214  unsigned lang;
1215  int64_t creation_time;
1216 
1217  if (c->fc->nb_streams < 1)
1218  return 0;
1219  st = c->fc->streams[c->fc->nb_streams-1];
1220  sc = st->priv_data;
1221 
1222  if (sc->time_scale) {
1223  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1224  return AVERROR_INVALIDDATA;
1225  }
1226 
1227  version = avio_r8(pb);
1228  if (version > 1) {
1229  avpriv_request_sample(c->fc, "Version %d", version);
1230  return AVERROR_PATCHWELCOME;
1231  }
1232  avio_rb24(pb); /* flags */
1233  if (version == 1) {
1234  creation_time = avio_rb64(pb);
1235  avio_rb64(pb);
1236  } else {
1237  creation_time = avio_rb32(pb);
1238  avio_rb32(pb); /* modification time */
1239  }
1240  mov_metadata_creation_time(&st->metadata, creation_time);
1241 
1242  sc->time_scale = avio_rb32(pb);
1243  if (sc->time_scale <= 0) {
1244  av_log(c->fc, AV_LOG_ERROR, "Invalid mdhd time scale %d, defaulting to 1\n", sc->time_scale);
1245  sc->time_scale = 1;
1246  }
1247  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1248 
1249  lang = avio_rb16(pb); /* language */
1250  if (ff_mov_lang_to_iso639(lang, language))
1251  av_dict_set(&st->metadata, "language", language, 0);
1252  avio_rb16(pb); /* quality */
1253 
1254  return 0;
1255 }
1256 
1258 {
1259  int i;
1260  int64_t creation_time;
1261  int version = avio_r8(pb); /* version */
1262  avio_rb24(pb); /* flags */
1263 
1264  if (version == 1) {
1265  creation_time = avio_rb64(pb);
1266  avio_rb64(pb);
1267  } else {
1268  creation_time = avio_rb32(pb);
1269  avio_rb32(pb); /* modification time */
1270  }
1271  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1272  c->time_scale = avio_rb32(pb); /* time scale */
1273  if (c->time_scale <= 0) {
1274  av_log(c->fc, AV_LOG_ERROR, "Invalid mvhd time scale %d, defaulting to 1\n", c->time_scale);
1275  c->time_scale = 1;
1276  }
1277  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1278 
1279  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1280  // set the AVCodecContext duration because the duration of individual tracks
1281  // may be inaccurate
1282  if (c->time_scale > 0 && !c->trex_data)
1284  avio_rb32(pb); /* preferred scale */
1285 
1286  avio_rb16(pb); /* preferred volume */
1287 
1288  avio_skip(pb, 10); /* reserved */
1289 
1290  /* movie display matrix, store it in main context and use it later on */
1291  for (i = 0; i < 3; i++) {
1292  c->movie_display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
1293  c->movie_display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
1294  c->movie_display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
1295  }
1296 
1297  avio_rb32(pb); /* preview time */
1298  avio_rb32(pb); /* preview duration */
1299  avio_rb32(pb); /* poster time */
1300  avio_rb32(pb); /* selection time */
1301  avio_rb32(pb); /* selection duration */
1302  avio_rb32(pb); /* current time */
1303  avio_rb32(pb); /* next track ID */
1304 
1305  return 0;
1306 }
1307 
1309 {
1310  AVStream *st;
1311  int little_endian;
1312 
1313  if (c->fc->nb_streams < 1)
1314  return 0;
1315  st = c->fc->streams[c->fc->nb_streams-1];
1316 
1317  little_endian = avio_rb16(pb) & 0xFF;
1318  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1319  if (little_endian == 1) {
1320  switch (st->codecpar->codec_id) {
1321  case AV_CODEC_ID_PCM_S24BE:
1323  break;
1324  case AV_CODEC_ID_PCM_S32BE:
1326  break;
1327  case AV_CODEC_ID_PCM_F32BE:
1329  break;
1330  case AV_CODEC_ID_PCM_F64BE:
1332  break;
1333  default:
1334  break;
1335  }
1336  }
1337  return 0;
1338 }
1339 
1341 {
1342  AVStream *st;
1343  char color_parameter_type[5] = { 0 };
1344  uint16_t color_primaries, color_trc, color_matrix;
1345  int ret;
1346 
1347  if (c->fc->nb_streams < 1)
1348  return 0;
1349  st = c->fc->streams[c->fc->nb_streams - 1];
1350 
1351  ret = ffio_read_size(pb, color_parameter_type, 4);
1352  if (ret < 0)
1353  return ret;
1354  if (strncmp(color_parameter_type, "nclx", 4) &&
1355  strncmp(color_parameter_type, "nclc", 4)) {
1356  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1357  color_parameter_type);
1358  return 0;
1359  }
1360 
1361  color_primaries = avio_rb16(pb);
1362  color_trc = avio_rb16(pb);
1363  color_matrix = avio_rb16(pb);
1364 
1365  av_log(c->fc, AV_LOG_TRACE,
1366  "%s: pri %d trc %d matrix %d",
1367  color_parameter_type, color_primaries, color_trc, color_matrix);
1368 
1369  if (!strncmp(color_parameter_type, "nclx", 4)) {
1370  uint8_t color_range = avio_r8(pb) >> 7;
1371  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1372  if (color_range)
1374  else
1376  }
1377 
1378  if (!av_color_primaries_name(color_primaries))
1379  color_primaries = AVCOL_PRI_UNSPECIFIED;
1380  if (!av_color_transfer_name(color_trc))
1381  color_trc = AVCOL_TRC_UNSPECIFIED;
1382  if (!av_color_space_name(color_matrix))
1383  color_matrix = AVCOL_SPC_UNSPECIFIED;
1384 
1386  st->codecpar->color_trc = color_trc;
1387  st->codecpar->color_space = color_matrix;
1388  av_log(c->fc, AV_LOG_TRACE, "\n");
1389 
1390  return 0;
1391 }
1392 
1394 {
1395  AVStream *st;
1396  unsigned mov_field_order;
1397  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1398 
1399  if (c->fc->nb_streams < 1) // will happen with jp2 files
1400  return 0;
1401  st = c->fc->streams[c->fc->nb_streams-1];
1402  if (atom.size < 2)
1403  return AVERROR_INVALIDDATA;
1404  mov_field_order = avio_rb16(pb);
1405  if ((mov_field_order & 0xFF00) == 0x0100)
1406  decoded_field_order = AV_FIELD_PROGRESSIVE;
1407  else if ((mov_field_order & 0xFF00) == 0x0200) {
1408  switch (mov_field_order & 0xFF) {
1409  case 0x01: decoded_field_order = AV_FIELD_TT;
1410  break;
1411  case 0x06: decoded_field_order = AV_FIELD_BB;
1412  break;
1413  case 0x09: decoded_field_order = AV_FIELD_TB;
1414  break;
1415  case 0x0E: decoded_field_order = AV_FIELD_BT;
1416  break;
1417  }
1418  }
1419  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1420  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1421  }
1422  st->codecpar->field_order = decoded_field_order;
1423 
1424  return 0;
1425 }
1426 
1428 {
1429  int err = 0;
1430  uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1431  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1432  return AVERROR_INVALIDDATA;
1433  if ((err = av_reallocp(&par->extradata, size)) < 0) {
1434  par->extradata_size = 0;
1435  return err;
1436  }
1438  return 0;
1439 }
1440 
1441 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1443  AVCodecParameters *par, uint8_t *buf)
1444 {
1445  int64_t result = atom.size;
1446  int err;
1447 
1448  AV_WB32(buf , atom.size + 8);
1449  AV_WL32(buf + 4, atom.type);
1450  err = ffio_read_size(pb, buf + 8, atom.size);
1451  if (err < 0) {
1452  par->extradata_size -= atom.size;
1453  return err;
1454  } else if (err < atom.size) {
1455  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1456  par->extradata_size -= atom.size - err;
1457  result = err;
1458  }
1459  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1460  return result;
1461 }
1462 
1463 /* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1465  enum AVCodecID codec_id)
1466 {
1467  AVStream *st;
1468  uint64_t original_size;
1469  int err;
1470 
1471  if (c->fc->nb_streams < 1) // will happen with jp2 files
1472  return 0;
1473  st = c->fc->streams[c->fc->nb_streams-1];
1474 
1475  if (st->codecpar->codec_id != codec_id)
1476  return 0; /* unexpected codec_id - don't mess with extradata */
1477 
1478  original_size = st->codecpar->extradata_size;
1479  err = mov_realloc_extradata(st->codecpar, atom);
1480  if (err)
1481  return err;
1482 
1483  err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1484  if (err < 0)
1485  return err;
1486  return 0; // Note: this is the original behavior to ignore truncation.
1487 }
1488 
1489 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1491 {
1492  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1493 }
1494 
1496 {
1497  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1498 }
1499 
1501 {
1502  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1503 }
1504 
1506 {
1507  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1508 }
1509 
1511 {
1512  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1513  if(ret == 0)
1514  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1515  return ret;
1516 }
1517 
1519 {
1520  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1521 
1522  if (!ret && c->fc->nb_streams >= 1) {
1523  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1524  if (par->extradata_size >= 40) {
1525  par->height = AV_RB16(&par->extradata[36]);
1526  par->width = AV_RB16(&par->extradata[38]);
1527  }
1528  }
1529  return ret;
1530 }
1531 
1533 {
1534  if (c->fc->nb_streams >= 1) {
1535  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1536  if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1537  par->codec_id == AV_CODEC_ID_H264 &&
1538  atom.size > 11) {
1539  int cid;
1540  avio_skip(pb, 10);
1541  cid = avio_rb16(pb);
1542  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1543  if (cid == 0xd4d || cid == 0xd4e)
1544  par->width = 1440;
1545  return 0;
1546  } else if ((par->codec_tag == MKTAG('A', 'V', 'd', '1') ||
1547  par->codec_tag == MKTAG('A', 'V', 'd', 'n')) &&
1548  atom.size >= 24) {
1549  int num, den;
1550  avio_skip(pb, 12);
1551  num = avio_rb32(pb);
1552  den = avio_rb32(pb);
1553  if (num <= 0 || den <= 0)
1554  return 0;
1555  switch (avio_rb32(pb)) {
1556  case 2:
1557  if (den >= INT_MAX / 2)
1558  return 0;
1559  den *= 2;
1560  case 1:
1561  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1562  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1563  default:
1564  return 0;
1565  }
1566  }
1567  }
1568 
1569  return mov_read_avid(c, pb, atom);
1570 }
1571 
1573 {
1574  int ret = 0;
1575  int length = 0;
1576  uint64_t original_size;
1577  if (c->fc->nb_streams >= 1) {
1578  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1579  if (par->codec_id == AV_CODEC_ID_H264)
1580  return 0;
1581  if (atom.size == 16) {
1582  original_size = par->extradata_size;
1583  ret = mov_realloc_extradata(par, atom);
1584  if (!ret) {
1585  length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1586  if (length == atom.size) {
1587  const uint8_t range_value = par->extradata[original_size + 19];
1588  switch (range_value) {
1589  case 1:
1591  break;
1592  case 2:
1594  break;
1595  default:
1596  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1597  break;
1598  }
1599  ff_dlog(c, "color_range: %d\n", par->color_range);
1600  } else {
1601  /* For some reason the whole atom was not added to the extradata */
1602  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1603  }
1604  } else {
1605  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1606  }
1607  } else {
1608  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1609  }
1610  }
1611 
1612  return ret;
1613 }
1614 
1616 {
1617  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1618 }
1619 
1621 {
1622  AVStream *st;
1623  int ret;
1624 
1625  if (c->fc->nb_streams < 1)
1626  return 0;
1627  st = c->fc->streams[c->fc->nb_streams-1];
1628 
1629  if ((uint64_t)atom.size > (1<<30))
1630  return AVERROR_INVALIDDATA;
1631 
1632  if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1635  // pass all frma atom to codec, needed at least for QDMC and QDM2
1636  av_freep(&st->codecpar->extradata);
1637  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1638  if (ret < 0)
1639  return ret;
1640  } else if (atom.size > 8) { /* to read frma, esds atoms */
1641  if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1642  uint64_t buffer;
1643  ret = ffio_ensure_seekback(pb, 8);
1644  if (ret < 0)
1645  return ret;
1646  buffer = avio_rb64(pb);
1647  atom.size -= 8;
1648  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1649  && buffer >> 32 <= atom.size
1650  && buffer >> 32 >= 8) {
1651  avio_skip(pb, -8);
1652  atom.size += 8;
1653  } else if (!st->codecpar->extradata_size) {
1654 #define ALAC_EXTRADATA_SIZE 36
1656  if (!st->codecpar->extradata)
1657  return AVERROR(ENOMEM);
1660  AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1661  AV_WB64(st->codecpar->extradata + 12, buffer);
1662  avio_read(pb, st->codecpar->extradata + 20, 16);
1663  avio_skip(pb, atom.size - 24);
1664  return 0;
1665  }
1666  }
1667  if ((ret = mov_read_default(c, pb, atom)) < 0)
1668  return ret;
1669  } else
1670  avio_skip(pb, atom.size);
1671  return 0;
1672 }
1673 
1674 /**
1675  * This function reads atom content and puts data in extradata without tag
1676  * nor size unlike mov_read_extradata.
1677  */
1679 {
1680  AVStream *st;
1681  int ret;
1682 
1683  if (c->fc->nb_streams < 1)
1684  return 0;
1685  st = c->fc->streams[c->fc->nb_streams-1];
1686 
1687  if ((uint64_t)atom.size > (1<<30))
1688  return AVERROR_INVALIDDATA;
1689 
1690  if (atom.size >= 10) {
1691  // Broken files created by legacy versions of libavformat will
1692  // wrap a whole fiel atom inside of a glbl atom.
1693  unsigned size = avio_rb32(pb);
1694  unsigned type = avio_rl32(pb);
1695  avio_seek(pb, -8, SEEK_CUR);
1696  if (type == MKTAG('f','i','e','l') && size == atom.size)
1697  return mov_read_default(c, pb, atom);
1698  }
1699  if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1700  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1701  return 0;
1702  }
1703  av_freep(&st->codecpar->extradata);
1704  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1705  if (ret < 0)
1706  return ret;
1707 
1708  return 0;
1709 }
1710 
1712 {
1713  AVStream *st;
1714  uint8_t profile_level;
1715  int ret;
1716 
1717  if (c->fc->nb_streams < 1)
1718  return 0;
1719  st = c->fc->streams[c->fc->nb_streams-1];
1720 
1721  if (atom.size >= (1<<28) || atom.size < 7)
1722  return AVERROR_INVALIDDATA;
1723 
1724  profile_level = avio_r8(pb);
1725  if ((profile_level & 0xf0) != 0xc0)
1726  return 0;
1727 
1728  avio_seek(pb, 6, SEEK_CUR);
1729  av_freep(&st->codecpar->extradata);
1730  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1731  if (ret < 0)
1732  return ret;
1733 
1734  return 0;
1735 }
1736 
1737 /**
1738  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1739  * but can have extradata appended at the end after the 40 bytes belonging
1740  * to the struct.
1741  */
1743 {
1744  AVStream *st;
1745  int ret;
1746 
1747  if (c->fc->nb_streams < 1)
1748  return 0;
1749  if (atom.size <= 40)
1750  return 0;
1751  st = c->fc->streams[c->fc->nb_streams-1];
1752 
1753  if ((uint64_t)atom.size > (1<<30))
1754  return AVERROR_INVALIDDATA;
1755 
1756  avio_skip(pb, 40);
1757  av_freep(&st->codecpar->extradata);
1758  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1759  if (ret < 0)
1760  return ret;
1761 
1762  return 0;
1763 }
1764 
1766 {
1767  AVStream *st;
1768  MOVStreamContext *sc;
1769  unsigned int i, entries;
1770 
1771  if (c->fc->nb_streams < 1)
1772  return 0;
1773  st = c->fc->streams[c->fc->nb_streams-1];
1774  sc = st->priv_data;
1775 
1776  avio_r8(pb); /* version */
1777  avio_rb24(pb); /* flags */
1778 
1779  entries = avio_rb32(pb);
1780 
1781  if (!entries)
1782  return 0;
1783 
1784  if (sc->chunk_offsets)
1785  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1786  av_free(sc->chunk_offsets);
1787  sc->chunk_count = 0;
1788  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1789  if (!sc->chunk_offsets)
1790  return AVERROR(ENOMEM);
1791  sc->chunk_count = entries;
1792 
1793  if (atom.type == MKTAG('s','t','c','o'))
1794  for (i = 0; i < entries && !pb->eof_reached; i++)
1795  sc->chunk_offsets[i] = avio_rb32(pb);
1796  else if (atom.type == MKTAG('c','o','6','4'))
1797  for (i = 0; i < entries && !pb->eof_reached; i++)
1798  sc->chunk_offsets[i] = avio_rb64(pb);
1799  else
1800  return AVERROR_INVALIDDATA;
1801 
1802  sc->chunk_count = i;
1803 
1804  if (pb->eof_reached)
1805  return AVERROR_EOF;
1806 
1807  return 0;
1808 }
1809 
1810 /**
1811  * Compute codec id for 'lpcm' tag.
1812  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1813  */
1815 {
1816  /* lpcm flags:
1817  * 0x1 = float
1818  * 0x2 = big-endian
1819  * 0x4 = signed
1820  */
1821  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1822 }
1823 
1824 static int mov_codec_id(AVStream *st, uint32_t format)
1825 {
1826  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1827 
1828  if (id <= 0 &&
1829  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1830  (format & 0xFFFF) == 'T' + ('S' << 8)))
1831  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1832 
1833  if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1835  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1836  /* skip old ASF MPEG-4 tag */
1837  format && format != MKTAG('m','p','4','s')) {
1839  if (id <= 0)
1840  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1841  if (id > 0)
1843  else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
1845  st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
1847  if (id > 0)
1849  }
1850  }
1851 
1852  st->codecpar->codec_tag = format;
1853 
1854  return id;
1855 }
1856 
1858  AVStream *st, MOVStreamContext *sc)
1859 {
1860  uint8_t codec_name[32] = { 0 };
1861  int64_t stsd_start;
1862  unsigned int len;
1863 
1864  /* The first 16 bytes of the video sample description are already
1865  * read in ff_mov_read_stsd_entries() */
1866  stsd_start = avio_tell(pb) - 16;
1867 
1868  avio_rb16(pb); /* version */
1869  avio_rb16(pb); /* revision level */
1870  avio_rb32(pb); /* vendor */
1871  avio_rb32(pb); /* temporal quality */
1872  avio_rb32(pb); /* spatial quality */
1873 
1874  st->codecpar->width = avio_rb16(pb); /* width */
1875  st->codecpar->height = avio_rb16(pb); /* height */
1876 
1877  avio_rb32(pb); /* horiz resolution */
1878  avio_rb32(pb); /* vert resolution */
1879  avio_rb32(pb); /* data size, always 0 */
1880  avio_rb16(pb); /* frames per samples */
1881 
1882  len = avio_r8(pb); /* codec name, pascal string */
1883  if (len > 31)
1884  len = 31;
1885  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1886  if (len < 31)
1887  avio_skip(pb, 31 - len);
1888 
1889  if (codec_name[0])
1890  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1891 
1892  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1893  if (!strncmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1894  st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1895  st->codecpar->width &= ~1;
1896  st->codecpar->height &= ~1;
1897  }
1898  /* Flash Media Server uses tag H.263 with Sorenson Spark */
1899  if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1900  !strncmp(codec_name, "Sorenson H263", 13))
1902 
1903  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1904 
1905  avio_seek(pb, stsd_start, SEEK_SET);
1906 
1907  if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
1908  st->codecpar->bits_per_coded_sample &= 0x1F;
1909  sc->has_palette = 1;
1910  }
1911 }
1912 
1914  AVStream *st, MOVStreamContext *sc)
1915 {
1916  int bits_per_sample, flags;
1917  uint16_t version = avio_rb16(pb);
1918  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1919 
1920  avio_rb16(pb); /* revision level */
1921  avio_rb32(pb); /* vendor */
1922 
1923  st->codecpar->channels = avio_rb16(pb); /* channel count */
1924  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1925  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1926 
1927  sc->audio_cid = avio_rb16(pb);
1928  avio_rb16(pb); /* packet size = 0 */
1929 
1930  st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1931 
1932  // Read QT version 1 fields. In version 0 these do not exist.
1933  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1934  if (!c->isom ||
1935  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1936 
1937  if (version == 1) {
1938  sc->samples_per_frame = avio_rb32(pb);
1939  avio_rb32(pb); /* bytes per packet */
1940  sc->bytes_per_frame = avio_rb32(pb);
1941  avio_rb32(pb); /* bytes per sample */
1942  } else if (version == 2) {
1943  avio_rb32(pb); /* sizeof struct only */
1945  st->codecpar->channels = avio_rb32(pb);
1946  avio_rb32(pb); /* always 0x7F000000 */
1948 
1949  flags = avio_rb32(pb); /* lpcm format specific flag */
1950  sc->bytes_per_frame = avio_rb32(pb);
1951  sc->samples_per_frame = avio_rb32(pb);
1952  if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1953  st->codecpar->codec_id =
1955  flags);
1956  }
1957  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1958  /* can't correctly handle variable sized packet as audio unit */
1959  switch (st->codecpar->codec_id) {
1960  case AV_CODEC_ID_MP2:
1961  case AV_CODEC_ID_MP3:
1963  break;
1964  }
1965  }
1966  }
1967 
1968  if (sc->format == 0) {
1969  if (st->codecpar->bits_per_coded_sample == 8)
1970  st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1971  else if (st->codecpar->bits_per_coded_sample == 16)
1972  st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1973  }
1974 
1975  switch (st->codecpar->codec_id) {
1976  case AV_CODEC_ID_PCM_S8:
1977  case AV_CODEC_ID_PCM_U8:
1978  if (st->codecpar->bits_per_coded_sample == 16)
1980  break;
1981  case AV_CODEC_ID_PCM_S16LE:
1982  case AV_CODEC_ID_PCM_S16BE:
1983  if (st->codecpar->bits_per_coded_sample == 8)
1985  else if (st->codecpar->bits_per_coded_sample == 24)
1986  st->codecpar->codec_id =
1989  else if (st->codecpar->bits_per_coded_sample == 32)
1990  st->codecpar->codec_id =
1993  break;
1994  /* set values for old format before stsd version 1 appeared */
1995  case AV_CODEC_ID_MACE3:
1996  sc->samples_per_frame = 6;
1997  sc->bytes_per_frame = 2 * st->codecpar->channels;
1998  break;
1999  case AV_CODEC_ID_MACE6:
2000  sc->samples_per_frame = 6;
2001  sc->bytes_per_frame = 1 * st->codecpar->channels;
2002  break;
2004  sc->samples_per_frame = 64;
2005  sc->bytes_per_frame = 34 * st->codecpar->channels;
2006  break;
2007  case AV_CODEC_ID_GSM:
2008  sc->samples_per_frame = 160;
2009  sc->bytes_per_frame = 33;
2010  break;
2011  default:
2012  break;
2013  }
2014 
2015  bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2016  if (bits_per_sample) {
2017  st->codecpar->bits_per_coded_sample = bits_per_sample;
2018  sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
2019  }
2020 }
2021 
2023  AVStream *st, MOVStreamContext *sc,
2024  int64_t size)
2025 {
2026  // ttxt stsd contains display flags, justification, background
2027  // color, fonts, and default styles, so fake an atom to read it
2028  MOVAtom fake_atom = { .size = size };
2029  // mp4s contains a regular esds atom
2030  if (st->codecpar->codec_tag != AV_RL32("mp4s"))
2031  mov_read_glbl(c, pb, fake_atom);
2032  st->codecpar->width = sc->width;
2033  st->codecpar->height = sc->height;
2034 }
2035 
2036 static uint32_t yuv_to_rgba(uint32_t ycbcr)
2037 {
2038  uint8_t r, g, b;
2039  int y, cb, cr;
2040 
2041  y = (ycbcr >> 16) & 0xFF;
2042  cr = (ycbcr >> 8) & 0xFF;
2043  cb = ycbcr & 0xFF;
2044 
2045  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
2046  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
2047  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
2048 
2049  return (r << 16) | (g << 8) | b;
2050 }
2051 
2053 {
2054  char buf[256] = {0};
2055  uint8_t *src = st->codecpar->extradata;
2056  int i;
2057 
2058  if (st->codecpar->extradata_size != 64)
2059  return 0;
2060 
2061  if (st->codecpar->width > 0 && st->codecpar->height > 0)
2062  snprintf(buf, sizeof(buf), "size: %dx%d\n",
2063  st->codecpar->width, st->codecpar->height);
2064  av_strlcat(buf, "palette: ", sizeof(buf));
2065 
2066  for (i = 0; i < 16; i++) {
2067  uint32_t yuv = AV_RB32(src + i * 4);
2068  uint32_t rgba = yuv_to_rgba(yuv);
2069 
2070  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2071  }
2072 
2073  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2074  return 0;
2075 
2076  av_freep(&st->codecpar->extradata);
2077  st->codecpar->extradata_size = 0;
2079  if (!st->codecpar->extradata)
2080  return AVERROR(ENOMEM);
2081  st->codecpar->extradata_size = strlen(buf);
2082  memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2083 
2084  return 0;
2085 }
2086 
2088  AVStream *st, MOVStreamContext *sc,
2089  int64_t size)
2090 {
2091  int ret;
2092 
2093  if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2094  if ((int)size != size)
2095  return AVERROR(ENOMEM);
2096 
2097  ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2098  if (ret < 0)
2099  return ret;
2100  if (size > 16) {
2101  MOVStreamContext *tmcd_ctx = st->priv_data;
2102  int val;
2103  val = AV_RB32(st->codecpar->extradata + 4);
2104  tmcd_ctx->tmcd_flags = val;
2105  st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2106  st->avg_frame_rate.den = 1;
2107 #if FF_API_LAVF_AVCTX
2109  st->codec->time_base = av_inv_q(st->avg_frame_rate);
2111 #endif
2112  /* adjust for per frame dur in counter mode */
2113  if (tmcd_ctx->tmcd_flags & 0x0008) {
2114  int timescale = AV_RB32(st->codecpar->extradata + 8);
2115  int framedur = AV_RB32(st->codecpar->extradata + 12);
2116  st->avg_frame_rate.num *= timescale;
2117  st->avg_frame_rate.den *= framedur;
2118 #if FF_API_LAVF_AVCTX
2120  st->codec->time_base.den *= timescale;
2121  st->codec->time_base.num *= framedur;
2123 #endif
2124  }
2125  if (size > 30) {
2126  uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2127  uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2128  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2129  uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2130  if (str_size > 0 && size >= (int)str_size + 26) {
2131  char *reel_name = av_malloc(str_size + 1);
2132  if (!reel_name)
2133  return AVERROR(ENOMEM);
2134  memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2135  reel_name[str_size] = 0; /* Add null terminator */
2136  /* don't add reel_name if emtpy string */
2137  if (*reel_name == 0) {
2138  av_free(reel_name);
2139  } else {
2140  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2141  }
2142  }
2143  }
2144  }
2145  }
2146  } else {
2147  /* other codec type, just skip (rtp, mp4s ...) */
2148  avio_skip(pb, size);
2149  }
2150  return 0;
2151 }
2152 
2154  AVStream *st, MOVStreamContext *sc)
2155 {
2156  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2157  !st->codecpar->sample_rate && sc->time_scale > 1)
2158  st->codecpar->sample_rate = sc->time_scale;
2159 
2160  /* special codec parameters handling */
2161  switch (st->codecpar->codec_id) {
2162 #if CONFIG_DV_DEMUXER
2163  case AV_CODEC_ID_DVAUDIO:
2165  if (!c->dv_fctx) {
2166  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2167  return AVERROR(ENOMEM);
2168  }
2170  if (!c->dv_demux) {
2171  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2172  return AVERROR(ENOMEM);
2173  }
2174  sc->dv_audio_container = 1;
2176  break;
2177 #endif
2178  /* no ifdef since parameters are always those */
2179  case AV_CODEC_ID_QCELP:
2180  st->codecpar->channels = 1;
2181  // force sample rate for qcelp when not stored in mov
2182  if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2183  st->codecpar->sample_rate = 8000;
2184  // FIXME: Why is the following needed for some files?
2185  sc->samples_per_frame = 160;
2186  if (!sc->bytes_per_frame)
2187  sc->bytes_per_frame = 35;
2188  break;
2189  case AV_CODEC_ID_AMR_NB:
2190  st->codecpar->channels = 1;
2191  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2192  st->codecpar->sample_rate = 8000;
2193  break;
2194  case AV_CODEC_ID_AMR_WB:
2195  st->codecpar->channels = 1;
2196  st->codecpar->sample_rate = 16000;
2197  break;
2198  case AV_CODEC_ID_MP2:
2199  case AV_CODEC_ID_MP3:
2200  /* force type after stsd for m1a hdlr */
2202  break;
2203  case AV_CODEC_ID_GSM:
2204  case AV_CODEC_ID_ADPCM_MS:
2206  case AV_CODEC_ID_ILBC:
2207  case AV_CODEC_ID_MACE3:
2208  case AV_CODEC_ID_MACE6:
2209  case AV_CODEC_ID_QDM2:
2211  break;
2212  case AV_CODEC_ID_ALAC:
2213  if (st->codecpar->extradata_size == 36) {
2214  st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2215  st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2216  }
2217  break;
2218  case AV_CODEC_ID_AC3:
2219  case AV_CODEC_ID_EAC3:
2221  case AV_CODEC_ID_VC1:
2222  case AV_CODEC_ID_VP9:
2224  break;
2225  default:
2226  break;
2227  }
2228  return 0;
2229 }
2230 
2232  int codec_tag, int format,
2233  int64_t size)
2234 {
2235  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2236 
2237  if (codec_tag &&
2238  (codec_tag != format &&
2239  // AVID 1:1 samples with differing data format and codec tag exist
2240  (codec_tag != AV_RL32("AV1x") || format != AV_RL32("AVup")) &&
2241  // prores is allowed to have differing data format and codec tag
2242  codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
2243  // so is dv (sigh)
2244  codec_tag != AV_RL32("dvpp") && codec_tag != AV_RL32("dvcp") &&
2245  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2246  : codec_tag != MKTAG('j','p','e','g')))) {
2247  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2248  * export it as a separate AVStream but this needs a few changes
2249  * in the MOV demuxer, patch welcome. */
2250 
2251  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2252  avio_skip(pb, size);
2253  return 1;
2254  }
2255 
2256  return 0;
2257 }
2258 
2260 {
2261  AVStream *st;
2262  MOVStreamContext *sc;
2263  int pseudo_stream_id;
2264 
2265  if (c->fc->nb_streams < 1)
2266  return 0;
2267  st = c->fc->streams[c->fc->nb_streams-1];
2268  sc = st->priv_data;
2269 
2270  for (pseudo_stream_id = 0;
2271  pseudo_stream_id < entries && !pb->eof_reached;
2272  pseudo_stream_id++) {
2273  //Parsing Sample description table
2274  enum AVCodecID id;
2275  int ret, dref_id = 1;
2276  MOVAtom a = { AV_RL32("stsd") };
2277  int64_t start_pos = avio_tell(pb);
2278  int64_t size = avio_rb32(pb); /* size */
2279  uint32_t format = avio_rl32(pb); /* data format */
2280 
2281  if (size >= 16) {
2282  avio_rb32(pb); /* reserved */
2283  avio_rb16(pb); /* reserved */
2284  dref_id = avio_rb16(pb);
2285  } else if (size <= 7) {
2286  av_log(c->fc, AV_LOG_ERROR,
2287  "invalid size %"PRId64" in stsd\n", size);
2288  return AVERROR_INVALIDDATA;
2289  }
2290 
2291  if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2292  size - (avio_tell(pb) - start_pos)))
2293  continue;
2294 
2295  sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2296  sc->dref_id= dref_id;
2297  sc->format = format;
2298 
2299  id = mov_codec_id(st, format);
2300 
2301  av_log(c->fc, AV_LOG_TRACE,
2302  "size=%"PRId64" 4CC=%s codec_type=%d\n", size,
2303  av_fourcc2str(format), st->codecpar->codec_type);
2304 
2306  st->codecpar->codec_id = id;
2307  mov_parse_stsd_video(c, pb, st, sc);
2308  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2309  st->codecpar->codec_id = id;
2310  mov_parse_stsd_audio(c, pb, st, sc);
2311  if (st->codecpar->sample_rate < 0) {
2312  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
2313  return AVERROR_INVALIDDATA;
2314  }
2315  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2316  st->codecpar->codec_id = id;
2317  mov_parse_stsd_subtitle(c, pb, st, sc,
2318  size - (avio_tell(pb) - start_pos));
2319  } else {
2320  ret = mov_parse_stsd_data(c, pb, st, sc,
2321  size - (avio_tell(pb) - start_pos));
2322  if (ret < 0)
2323  return ret;
2324  }
2325  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2326  a.size = size - (avio_tell(pb) - start_pos);
2327  if (a.size > 8) {
2328  if ((ret = mov_read_default(c, pb, a)) < 0)
2329  return ret;
2330  } else if (a.size > 0)
2331  avio_skip(pb, a.size);
2332 
2333  if (sc->extradata && st->codecpar->extradata) {
2334  int extra_size = st->codecpar->extradata_size;
2335 
2336  /* Move the current stream extradata to the stream context one. */
2337  sc->extradata_size[pseudo_stream_id] = extra_size;
2338  sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
2339  if (!sc->extradata[pseudo_stream_id])
2340  return AVERROR(ENOMEM);
2341  memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
2342  av_freep(&st->codecpar->extradata);
2343  st->codecpar->extradata_size = 0;
2344  }
2345  }
2346 
2347  if (pb->eof_reached)
2348  return AVERROR_EOF;
2349 
2350  return 0;
2351 }
2352 
2354 {
2355  AVStream *st;
2356  MOVStreamContext *sc;
2357  int ret, entries;
2358 
2359  if (c->fc->nb_streams < 1)
2360  return 0;
2361  st = c->fc->streams[c->fc->nb_streams - 1];
2362  sc = st->priv_data;
2363 
2364  avio_r8(pb); /* version */
2365  avio_rb24(pb); /* flags */
2366  entries = avio_rb32(pb);
2367 
2368  if (entries <= 0) {
2369  av_log(c->fc, AV_LOG_ERROR, "invalid STSD entries %d\n", entries);
2370  return AVERROR_INVALIDDATA;
2371  }
2372 
2373  if (sc->extradata) {
2374  av_log(c->fc, AV_LOG_ERROR,
2375  "Duplicate stsd found in this track.\n");
2376  return AVERROR_INVALIDDATA;
2377  }
2378 
2379  /* Prepare space for hosting multiple extradata. */
2380  sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
2381  sc->extradata_size = av_mallocz_array(entries, sizeof(*sc->extradata_size));
2382  if (!sc->extradata_size || !sc->extradata) {
2383  ret = AVERROR(ENOMEM);
2384  goto fail;
2385  }
2386 
2387  ret = ff_mov_read_stsd_entries(c, pb, entries);
2388  if (ret < 0)
2389  return ret;
2390 
2391  sc->stsd_count = entries;
2392 
2393  /* Restore back the primary extradata. */
2394  av_freep(&st->codecpar->extradata);
2395  st->codecpar->extradata_size = sc->extradata_size[0];
2396  if (sc->extradata_size[0]) {
2398  if (!st->codecpar->extradata)
2399  return AVERROR(ENOMEM);
2400  memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
2401  }
2402 
2403  return mov_finalize_stsd_codec(c, pb, st, sc);
2404 fail:
2405  av_freep(&sc->extradata);
2406  av_freep(&sc->extradata_size);
2407  return ret;
2408 }
2409 
2411 {
2412  AVStream *st;
2413  MOVStreamContext *sc;
2414  unsigned int i, entries;
2415 
2416  if (c->fc->nb_streams < 1)
2417  return 0;
2418  st = c->fc->streams[c->fc->nb_streams-1];
2419  sc = st->priv_data;
2420 
2421  avio_r8(pb); /* version */
2422  avio_rb24(pb); /* flags */
2423 
2424  entries = avio_rb32(pb);
2425  if ((uint64_t)entries * 12 + 4 > atom.size)
2426  return AVERROR_INVALIDDATA;
2427 
2428  av_log(c->fc, AV_LOG_TRACE, "track[%u].stsc.entries = %u\n", c->fc->nb_streams - 1, entries);
2429 
2430  if (!entries)
2431  return 0;
2432  if (sc->stsc_data)
2433  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2434  av_free(sc->stsc_data);
2435  sc->stsc_count = 0;
2436  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2437  if (!sc->stsc_data)
2438  return AVERROR(ENOMEM);
2439 
2440  for (i = 0; i < entries && !pb->eof_reached; i++) {
2441  sc->stsc_data[i].first = avio_rb32(pb);
2442  sc->stsc_data[i].count = avio_rb32(pb);
2443  sc->stsc_data[i].id = avio_rb32(pb);
2444  }
2445 
2446  sc->stsc_count = i;
2447 
2448  if (pb->eof_reached)
2449  return AVERROR_EOF;
2450 
2451  return 0;
2452 }
2453 
2454 static inline int mov_stsc_index_valid(unsigned int index, unsigned int count)
2455 {
2456  return index < count - 1;
2457 }
2458 
2459 /* Compute the samples value for the stsc entry at the given index. */
2460 static inline int mov_get_stsc_samples(MOVStreamContext *sc, unsigned int index)
2461 {
2462  int chunk_count;
2463 
2464  if (mov_stsc_index_valid(index, sc->stsc_count))
2465  chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2466  else
2467  chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2468 
2469  return sc->stsc_data[index].count * chunk_count;
2470 }
2471 
2473 {
2474  AVStream *st;
2475  MOVStreamContext *sc;
2476  unsigned i, entries;
2477 
2478  if (c->fc->nb_streams < 1)
2479  return 0;
2480  st = c->fc->streams[c->fc->nb_streams-1];
2481  sc = st->priv_data;
2482 
2483  avio_rb32(pb); // version + flags
2484 
2485  entries = avio_rb32(pb);
2486  if (sc->stps_data)
2487  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2488  av_free(sc->stps_data);
2489  sc->stps_count = 0;
2490  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2491  if (!sc->stps_data)
2492  return AVERROR(ENOMEM);
2493 
2494  for (i = 0; i < entries && !pb->eof_reached; i++) {
2495  sc->stps_data[i] = avio_rb32(pb);
2496  }
2497 
2498  sc->stps_count = i;
2499 
2500  if (pb->eof_reached)
2501  return AVERROR_EOF;
2502 
2503  return 0;
2504 }
2505 
2507 {
2508  AVStream *st;
2509  MOVStreamContext *sc;
2510  unsigned int i, entries;
2511 
2512  if (c->fc->nb_streams < 1)
2513  return 0;
2514  st = c->fc->streams[c->fc->nb_streams-1];
2515  sc = st->priv_data;
2516 
2517  avio_r8(pb); /* version */
2518  avio_rb24(pb); /* flags */
2519 
2520  entries = avio_rb32(pb);
2521 
2522  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %u\n", entries);
2523 
2524  if (!entries)
2525  {
2526  sc->keyframe_absent = 1;
2527  if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2529  return 0;
2530  }
2531  if (sc->keyframes)
2532  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2533  if (entries >= UINT_MAX / sizeof(int))
2534  return AVERROR_INVALIDDATA;
2535  av_freep(&sc->keyframes);
2536  sc->keyframe_count = 0;
2537  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2538  if (!sc->keyframes)
2539  return AVERROR(ENOMEM);
2540 
2541  for (i = 0; i < entries && !pb->eof_reached; i++) {
2542  sc->keyframes[i] = avio_rb32(pb);
2543  }
2544 
2545  sc->keyframe_count = i;
2546 
2547  if (pb->eof_reached)
2548  return AVERROR_EOF;
2549 
2550  return 0;
2551 }
2552 
2554 {
2555  AVStream *st;
2556  MOVStreamContext *sc;
2557  unsigned int i, entries, sample_size, field_size, num_bytes;
2558  GetBitContext gb;
2559  unsigned char* buf;
2560  int ret;
2561 
2562  if (c->fc->nb_streams < 1)
2563  return 0;
2564  st = c->fc->streams[c->fc->nb_streams-1];
2565  sc = st->priv_data;
2566 
2567  avio_r8(pb); /* version */
2568  avio_rb24(pb); /* flags */
2569 
2570  if (atom.type == MKTAG('s','t','s','z')) {
2571  sample_size = avio_rb32(pb);
2572  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2573  sc->sample_size = sample_size;
2574  sc->stsz_sample_size = sample_size;
2575  field_size = 32;
2576  } else {
2577  sample_size = 0;
2578  avio_rb24(pb); /* reserved */
2579  field_size = avio_r8(pb);
2580  }
2581  entries = avio_rb32(pb);
2582 
2583  av_log(c->fc, AV_LOG_TRACE, "sample_size = %u sample_count = %u\n", sc->sample_size, entries);
2584 
2585  sc->sample_count = entries;
2586  if (sample_size)
2587  return 0;
2588 
2589  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2590  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %u\n", field_size);
2591  return AVERROR_INVALIDDATA;
2592  }
2593 
2594  if (!entries)
2595  return 0;
2596  if (entries >= (UINT_MAX - 4) / field_size)
2597  return AVERROR_INVALIDDATA;
2598  if (sc->sample_sizes)
2599  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2600  av_free(sc->sample_sizes);
2601  sc->sample_count = 0;
2602  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2603  if (!sc->sample_sizes)
2604  return AVERROR(ENOMEM);
2605 
2606  num_bytes = (entries*field_size+4)>>3;
2607 
2608  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2609  if (!buf) {
2610  av_freep(&sc->sample_sizes);
2611  return AVERROR(ENOMEM);
2612  }
2613 
2614  ret = ffio_read_size(pb, buf, num_bytes);
2615  if (ret < 0) {
2616  av_freep(&sc->sample_sizes);
2617  av_free(buf);
2618  return ret;
2619  }
2620 
2621  init_get_bits(&gb, buf, 8*num_bytes);
2622 
2623  for (i = 0; i < entries && !pb->eof_reached; i++) {
2624  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2625  sc->data_size += sc->sample_sizes[i];
2626  }
2627 
2628  sc->sample_count = i;
2629 
2630  av_free(buf);
2631 
2632  if (pb->eof_reached)
2633  return AVERROR_EOF;
2634 
2635  return 0;
2636 }
2637 
2639 {
2640  AVStream *st;
2641  MOVStreamContext *sc;
2642  unsigned int i, entries;
2643  int64_t duration=0;
2644  int64_t total_sample_count=0;
2645 
2646  if (c->fc->nb_streams < 1)
2647  return 0;
2648  st = c->fc->streams[c->fc->nb_streams-1];
2649  sc = st->priv_data;
2650 
2651  avio_r8(pb); /* version */
2652  avio_rb24(pb); /* flags */
2653  entries = avio_rb32(pb);
2654 
2655  av_log(c->fc, AV_LOG_TRACE, "track[%u].stts.entries = %u\n",
2656  c->fc->nb_streams-1, entries);
2657 
2658  if (sc->stts_data)
2659  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2660  av_free(sc->stts_data);
2661  sc->stts_count = 0;
2662  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2663  if (!sc->stts_data)
2664  return AVERROR(ENOMEM);
2665 
2666  for (i = 0; i < entries && !pb->eof_reached; i++) {
2667  int sample_duration;
2668  unsigned int sample_count;
2669 
2670  sample_count=avio_rb32(pb);
2671  sample_duration = avio_rb32(pb);
2672 
2673  sc->stts_data[i].count= sample_count;
2674  sc->stts_data[i].duration= sample_duration;
2675 
2676  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2677  sample_count, sample_duration);
2678 
2679  if ( i+1 == entries
2680  && i
2681  && sample_count == 1
2682  && total_sample_count > 100
2683  && sample_duration/10 > duration / total_sample_count)
2684  sample_duration = duration / total_sample_count;
2685  duration+=(int64_t)sample_duration*sample_count;
2686  total_sample_count+=sample_count;
2687  }
2688 
2689  sc->stts_count = i;
2690 
2691  sc->duration_for_fps += duration;
2692  sc->nb_frames_for_fps += total_sample_count;
2693 
2694  if (pb->eof_reached)
2695  return AVERROR_EOF;
2696 
2697  st->nb_frames= total_sample_count;
2698  if (duration)
2699  st->duration= duration;
2700  sc->track_end = duration;
2701  return 0;
2702 }
2703 
2705 {
2706  if (duration < 0) {
2707  if (duration == INT_MIN) {
2708  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2709  duration++;
2710  }
2711  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2712  }
2713 }
2714 
2716 {
2717  AVStream *st;
2718  MOVStreamContext *sc;
2719  unsigned int i, entries, ctts_count = 0;
2720 
2721  if (c->fc->nb_streams < 1)
2722  return 0;
2723  st = c->fc->streams[c->fc->nb_streams-1];
2724  sc = st->priv_data;
2725 
2726  avio_r8(pb); /* version */
2727  avio_rb24(pb); /* flags */
2728  entries = avio_rb32(pb);
2729 
2730  av_log(c->fc, AV_LOG_TRACE, "track[%u].ctts.entries = %u\n", c->fc->nb_streams - 1, entries);
2731 
2732  if (!entries)
2733  return 0;
2734  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2735  return AVERROR_INVALIDDATA;
2736  av_freep(&sc->ctts_data);
2737  sc->ctts_data = av_fast_realloc(NULL, &sc->ctts_allocated_size, entries * sizeof(*sc->ctts_data));
2738  if (!sc->ctts_data)
2739  return AVERROR(ENOMEM);
2740 
2741  for (i = 0; i < entries && !pb->eof_reached; i++) {
2742  int count =avio_rb32(pb);
2743  int duration =avio_rb32(pb);
2744 
2745  if (count <= 0) {
2746  av_log(c->fc, AV_LOG_TRACE,
2747  "ignoring CTTS entry with count=%d duration=%d\n",
2748  count, duration);
2749  continue;
2750  }
2751 
2752  add_ctts_entry(&sc->ctts_data, &ctts_count, &sc->ctts_allocated_size,
2753  count, duration);
2754 
2755  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2756  count, duration);
2757 
2758  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2759  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2760  av_freep(&sc->ctts_data);
2761  sc->ctts_count = 0;
2762  return 0;
2763  }
2764 
2765  if (i+2<entries)
2766  mov_update_dts_shift(sc, duration);
2767  }
2768 
2769  sc->ctts_count = ctts_count;
2770 
2771  if (pb->eof_reached)
2772  return AVERROR_EOF;
2773 
2774  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2775 
2776  return 0;
2777 }
2778 
2780 {
2781  AVStream *st;
2782  MOVStreamContext *sc;
2783  unsigned int i, entries;
2784  uint8_t version;
2785  uint32_t grouping_type;
2786 
2787  if (c->fc->nb_streams < 1)
2788  return 0;
2789  st = c->fc->streams[c->fc->nb_streams-1];
2790  sc = st->priv_data;
2791 
2792  version = avio_r8(pb); /* version */
2793  avio_rb24(pb); /* flags */
2794  grouping_type = avio_rl32(pb);
2795  if (grouping_type != MKTAG( 'r','a','p',' '))
2796  return 0; /* only support 'rap ' grouping */
2797  if (version == 1)
2798  avio_rb32(pb); /* grouping_type_parameter */
2799 
2800  entries = avio_rb32(pb);
2801  if (!entries)
2802  return 0;
2803  if (sc->rap_group)
2804  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2805  av_free(sc->rap_group);
2806  sc->rap_group_count = 0;
2807  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2808  if (!sc->rap_group)
2809  return AVERROR(ENOMEM);
2810 
2811  for (i = 0; i < entries && !pb->eof_reached; i++) {
2812  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2813  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2814  }
2815 
2816  sc->rap_group_count = i;
2817 
2818  return pb->eof_reached ? AVERROR_EOF : 0;
2819 }
2820 
2821 /**
2822  * Get ith edit list entry (media time, duration).
2823  */
2825  const MOVStreamContext *msc,
2826  unsigned int edit_list_index,
2827  int64_t *edit_list_media_time,
2828  int64_t *edit_list_duration,
2829  int64_t global_timescale)
2830 {
2831  if (edit_list_index == msc->elst_count) {
2832  return 0;
2833  }
2834  *edit_list_media_time = msc->elst_data[edit_list_index].time;
2835  *edit_list_duration = msc->elst_data[edit_list_index].duration;
2836 
2837  /* duration is in global timescale units;convert to msc timescale */
2838  if (global_timescale == 0) {
2839  avpriv_request_sample(mov->fc, "Support for mvhd.timescale = 0 with editlists");
2840  return 0;
2841  }
2842  *edit_list_duration = av_rescale(*edit_list_duration, msc->time_scale,
2843  global_timescale);
2844  return 1;
2845 }
2846 
2847 /**
2848  * Find the closest previous frame to the timestamp, in e_old index
2849  * entries. Searching for just any frame / just key frames can be controlled by
2850  * last argument 'flag'.
2851  * Returns the index of the entry in st->index_entries if successful,
2852  * else returns -1.
2853  */
2855  AVIndexEntry *e_old,
2856  int nb_old,
2857  int64_t timestamp,
2858  int flag)
2859 {
2860  AVIndexEntry *e_keep = st->index_entries;
2861  int nb_keep = st->nb_index_entries;
2862  int64_t found = -1;
2863  int64_t i = 0;
2864 
2865  st->index_entries = e_old;
2866  st->nb_index_entries = nb_old;
2867  found = av_index_search_timestamp(st, timestamp, flag | AVSEEK_FLAG_BACKWARD);
2868 
2869  // Keep going backwards in the index entries until the timestamp is the same.
2870  if (found >= 0) {
2871  for (i = found; i > 0 && e_old[i].timestamp == e_old[i - 1].timestamp;
2872  i--) {
2873  if ((flag & AVSEEK_FLAG_ANY) ||
2874  (e_old[i - 1].flags & AVINDEX_KEYFRAME)) {
2875  found = i - 1;
2876  }
2877  }
2878  }
2879 
2880  /* restore AVStream state*/
2881  st->index_entries = e_keep;
2882  st->nb_index_entries = nb_keep;
2883  return found;
2884 }
2885 
2886 /**
2887  * Add index entry with the given values, to the end of st->index_entries.
2888  * Returns the new size st->index_entries if successful, else returns -1.
2889  *
2890  * This function is similar to ff_add_index_entry in libavformat/utils.c
2891  * except that here we are always unconditionally adding an index entry to
2892  * the end, instead of searching the entries list and skipping the add if
2893  * there is an existing entry with the same timestamp.
2894  * This is needed because the mov_fix_index calls this func with the same
2895  * unincremented timestamp for successive discarded frames.
2896  */
2897 static int64_t add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2898  int size, int distance, int flags)
2899 {
2900  AVIndexEntry *entries, *ie;
2901  int64_t index = -1;
2902  const size_t min_size_needed = (st->nb_index_entries + 1) * sizeof(AVIndexEntry);
2903 
2904  // Double the allocation each time, to lower memory fragmentation.
2905  // Another difference from ff_add_index_entry function.
2906  const size_t requested_size =
2907  min_size_needed > st->index_entries_allocated_size ?
2908  FFMAX(min_size_needed, 2 * st->index_entries_allocated_size) :
2909  min_size_needed;
2910 
2911  if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
2912  return -1;
2913 
2914  entries = av_fast_realloc(st->index_entries,
2916  requested_size);
2917  if(!entries)
2918  return -1;
2919 
2920  st->index_entries= entries;
2921 
2922  index= st->nb_index_entries++;
2923  ie= &entries[index];
2924 
2925  ie->pos = pos;
2926  ie->timestamp = timestamp;
2927  ie->min_distance= distance;
2928  ie->size= size;
2929  ie->flags = flags;
2930  return index;
2931 }
2932 
2933 /**
2934  * Rewrite timestamps of index entries in the range [end_index - frame_duration_buffer_size, end_index)
2935  * by subtracting end_ts successively by the amounts given in frame_duration_buffer.
2936  */
2937 static void fix_index_entry_timestamps(AVStream* st, int end_index, int64_t end_ts,
2938  int64_t* frame_duration_buffer,
2939  int frame_duration_buffer_size) {
2940  int i = 0;
2941  av_assert0(end_index >= 0 && end_index <= st->nb_index_entries);
2942  for (i = 0; i < frame_duration_buffer_size; i++) {
2943  end_ts -= frame_duration_buffer[frame_duration_buffer_size - 1 - i];
2944  st->index_entries[end_index - 1 - i].timestamp = end_ts;
2945  }
2946 }
2947 
2948 /**
2949  * Append a new ctts entry to ctts_data.
2950  * Returns the new ctts_count if successful, else returns -1.
2951  */
2952 static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
2953  int count, int duration)
2954 {
2955  MOVStts *ctts_buf_new;
2956  const size_t min_size_needed = (*ctts_count + 1) * sizeof(MOVStts);
2957  const size_t requested_size =
2958  min_size_needed > *allocated_size ?
2959  FFMAX(min_size_needed, 2 * (*allocated_size)) :
2960  min_size_needed;
2961 
2962  if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts))
2963  return -1;
2964 
2965  ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);
2966 
2967  if(!ctts_buf_new)
2968  return -1;
2969 
2970  *ctts_data = ctts_buf_new;
2971 
2972  ctts_buf_new[*ctts_count].count = count;
2973  ctts_buf_new[*ctts_count].duration = duration;
2974 
2975  *ctts_count = (*ctts_count) + 1;
2976  return *ctts_count;
2977 }
2978 
2980 {
2981  sc->current_sample++;
2982  sc->current_index++;
2983  if (sc->index_ranges &&
2984  sc->current_index >= sc->current_index_range->end &&
2985  sc->current_index_range->end) {
2986  sc->current_index_range++;
2988  }
2989 }
2990 
2992 {
2993  sc->current_sample--;
2994  sc->current_index--;
2995  if (sc->index_ranges &&
2997  sc->current_index_range > sc->index_ranges) {
2998  sc->current_index_range--;
2999  sc->current_index = sc->current_index_range->end - 1;
3000  }
3001 }
3002 
3003 static void mov_current_sample_set(MOVStreamContext *sc, int current_sample)
3004 {
3005  int64_t range_size;
3006 
3007  sc->current_sample = current_sample;
3008  sc->current_index = current_sample;
3009  if (!sc->index_ranges) {
3010  return;
3011  }
3012 
3013  for (sc->current_index_range = sc->index_ranges;
3014  sc->current_index_range->end;
3015  sc->current_index_range++) {
3016  range_size = sc->current_index_range->end - sc->current_index_range->start;
3017  if (range_size > current_sample) {
3018  sc->current_index = sc->current_index_range->start + current_sample;
3019  break;
3020  }
3021  current_sample -= range_size;
3022  }
3023 }
3024 
3025 /**
3026  * Fix st->index_entries, so that it contains only the entries (and the entries
3027  * which are needed to decode them) that fall in the edit list time ranges.
3028  * Also fixes the timestamps of the index entries to match the timeline
3029  * specified the edit lists.
3030  */
3031 static void mov_fix_index(MOVContext *mov, AVStream *st)
3032 {
3033  MOVStreamContext *msc = st->priv_data;
3034  AVIndexEntry *e_old = st->index_entries;
3035  int nb_old = st->nb_index_entries;
3036  const AVIndexEntry *e_old_end = e_old + nb_old;
3037  const AVIndexEntry *current = NULL;
3038  MOVStts *ctts_data_old = msc->ctts_data;
3039  int64_t ctts_index_old = 0;
3040  int64_t ctts_sample_old = 0;
3041  int64_t ctts_count_old = msc->ctts_count;
3042  int64_t edit_list_media_time = 0;
3043  int64_t edit_list_duration = 0;
3044  int64_t frame_duration = 0;
3045  int64_t edit_list_dts_counter = 0;
3046  int64_t edit_list_dts_entry_end = 0;
3047  int64_t edit_list_start_ctts_sample = 0;
3048  int64_t curr_cts;
3049  int64_t curr_ctts = 0;
3050  int64_t min_corrected_pts = -1;
3051  int64_t empty_edits_sum_duration = 0;
3052  int64_t edit_list_index = 0;
3053  int64_t index;
3054  int64_t index_ctts_count;
3055  int flags;
3056  int64_t start_dts = 0;
3057  int64_t edit_list_media_time_dts = 0;
3058  int64_t edit_list_start_encountered = 0;
3059  int64_t search_timestamp = 0;
3060  int64_t* frame_duration_buffer = NULL;
3061  int num_discarded_begin = 0;
3062  int first_non_zero_audio_edit = -1;
3063  int packet_skip_samples = 0;
3064  MOVIndexRange *current_index_range;
3065  int i;
3066 
3067  if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
3068  return;
3069  }
3070 
3071  // allocate the index ranges array
3072  msc->index_ranges = av_malloc((msc->elst_count + 1) * sizeof(msc->index_ranges[0]));
3073  if (!msc->index_ranges) {
3074  av_log(mov->fc, AV_LOG_ERROR, "Cannot allocate index ranges buffer\n");
3075  return;
3076  }
3077  msc->current_index_range = msc->index_ranges;
3078  current_index_range = msc->index_ranges - 1;
3079 
3080  // Clean AVStream from traces of old index
3081  st->index_entries = NULL;
3083  st->nb_index_entries = 0;
3084 
3085  // Clean ctts fields of MOVStreamContext
3086  msc->ctts_data = NULL;
3087  msc->ctts_count = 0;
3088  msc->ctts_index = 0;
3089  msc->ctts_sample = 0;
3090  msc->ctts_allocated_size = 0;
3091 
3092  // If the dts_shift is positive (in case of negative ctts values in mov),
3093  // then negate the DTS by dts_shift
3094  if (msc->dts_shift > 0) {
3095  edit_list_dts_entry_end -= msc->dts_shift;
3096  av_log(mov->fc, AV_LOG_DEBUG, "Shifting DTS by %d because of negative CTTS.\n", msc->dts_shift);
3097  }
3098 
3099  start_dts = edit_list_dts_entry_end;
3100 
3101  while (get_edit_list_entry(mov, msc, edit_list_index, &edit_list_media_time,
3102  &edit_list_duration, mov->time_scale)) {
3103  av_log(mov->fc, AV_LOG_DEBUG, "Processing st: %d, edit list %"PRId64" - media time: %"PRId64", duration: %"PRId64"\n",
3104  st->index, edit_list_index, edit_list_media_time, edit_list_duration);
3105  edit_list_index++;
3106  edit_list_dts_counter = edit_list_dts_entry_end;
3107  edit_list_dts_entry_end += edit_list_duration;
3108  num_discarded_begin = 0;
3109  if (edit_list_media_time == -1) {
3110  empty_edits_sum_duration += edit_list_duration;
3111  continue;
3112  }
3113 
3114  // If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
3115  // according to the edit list below.
3116  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3117  if (first_non_zero_audio_edit < 0) {
3118  first_non_zero_audio_edit = 1;
3119  } else {
3120  first_non_zero_audio_edit = 0;
3121  }
3122 
3123  if (first_non_zero_audio_edit > 0)
3124  st->skip_samples = msc->start_pad = 0;
3125  }
3126 
3127  //find closest previous key frame
3128  edit_list_media_time_dts = edit_list_media_time;
3129  if (msc->dts_shift > 0) {
3130  edit_list_media_time_dts -= msc->dts_shift;
3131  }
3132 
3133  // While reordering frame index according to edit list we must handle properly
3134  // the scenario when edit list entry starts from none key frame.
3135  // We find closest previous key frame and preserve it and consequent frames in index.
3136  // All frames which are outside edit list entry time boundaries will be dropped after decoding.
3137  search_timestamp = edit_list_media_time_dts;
3138  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3139  // Audio decoders like AAC need need a decoder delay samples previous to the current sample,
3140  // to correctly decode this frame. Hence for audio we seek to a frame 1 sec. before the
3141  // edit_list_media_time to cover the decoder delay.
3142  search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
3143  }
3144 
3145  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, 0);
3146  if (index == -1) {
3147  av_log(mov->fc, AV_LOG_WARNING,
3148  "st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
3149  st->index, edit_list_index, search_timestamp);
3150  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, AVSEEK_FLAG_ANY);
3151 
3152  if (index == -1) {
3153  av_log(mov->fc, AV_LOG_WARNING,
3154  "st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n"
3155  "Rounding edit list media time to zero.\n",
3156  st->index, edit_list_index, search_timestamp);
3157  index = 0;
3158  edit_list_media_time = 0;
3159  }
3160  }
3161  current = e_old + index;
3162 
3163  ctts_index_old = 0;
3164  ctts_sample_old = 0;
3165 
3166  // set ctts_index properly for the found key frame
3167  for (index_ctts_count = 0; index_ctts_count < index; index_ctts_count++) {
3168  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3169  ctts_sample_old++;
3170  if (ctts_data_old[ctts_index_old].count == ctts_sample_old) {
3171  ctts_index_old++;
3172  ctts_sample_old = 0;
3173  }
3174  }
3175  }
3176 
3177  edit_list_start_ctts_sample = ctts_sample_old;
3178 
3179  // Iterate over index and arrange it according to edit list
3180  edit_list_start_encountered = 0;
3181  for (; current < e_old_end; current++, index++) {
3182  // check if frame outside edit list mark it for discard
3183  frame_duration = (current + 1 < e_old_end) ?
3184  ((current + 1)->timestamp - current->timestamp) : edit_list_duration;
3185 
3186  flags = current->flags;
3187 
3188  // frames (pts) before or after edit list
3189  curr_cts = current->timestamp + msc->dts_shift;
3190  curr_ctts = 0;
3191 
3192  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3193  curr_ctts = ctts_data_old[ctts_index_old].duration;
3194  av_log(mov->fc, AV_LOG_DEBUG, "stts: %"PRId64" ctts: %"PRId64", ctts_index: %"PRId64", ctts_count: %"PRId64"\n",
3195  curr_cts, curr_ctts, ctts_index_old, ctts_count_old);
3196  curr_cts += curr_ctts;
3197  ctts_sample_old++;
3198  if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
3199  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3200  &msc->ctts_allocated_size,
3201  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3202  ctts_data_old[ctts_index_old].duration) == -1) {
3203  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3204  ctts_index_old,
3205  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3206  ctts_data_old[ctts_index_old].duration);
3207  break;
3208  }
3209  ctts_index_old++;
3210  ctts_sample_old = 0;
3211  edit_list_start_ctts_sample = 0;
3212  }
3213  }
3214 
3215  if (curr_cts < edit_list_media_time || curr_cts >= (edit_list_duration + edit_list_media_time)) {
3217  curr_cts < edit_list_media_time && curr_cts + frame_duration > edit_list_media_time &&
3218  first_non_zero_audio_edit > 0) {
3219  packet_skip_samples = edit_list_media_time - curr_cts;
3220  st->skip_samples += packet_skip_samples;
3221 
3222  // Shift the index entry timestamp by packet_skip_samples to be correct.
3223  edit_list_dts_counter -= packet_skip_samples;
3224  if (edit_list_start_encountered == 0) {
3225  edit_list_start_encountered = 1;
3226  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3227  // discarded packets.
3228  if (frame_duration_buffer) {
3229  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3230  frame_duration_buffer, num_discarded_begin);
3231  av_freep(&frame_duration_buffer);
3232  }
3233  }
3234 
3235  av_log(mov->fc, AV_LOG_DEBUG, "skip %d audio samples from curr_cts: %"PRId64"\n", packet_skip_samples, curr_cts);
3236  } else {
3237  flags |= AVINDEX_DISCARD_FRAME;
3238  av_log(mov->fc, AV_LOG_DEBUG, "drop a frame at curr_cts: %"PRId64" @ %"PRId64"\n", curr_cts, index);
3239 
3240  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && edit_list_start_encountered == 0) {
3241  num_discarded_begin++;
3242  frame_duration_buffer = av_realloc(frame_duration_buffer,
3243  num_discarded_begin * sizeof(int64_t));
3244  if (!frame_duration_buffer) {
3245  av_log(mov->fc, AV_LOG_ERROR, "Cannot reallocate frame duration buffer\n");
3246  break;
3247  }
3248  frame_duration_buffer[num_discarded_begin - 1] = frame_duration;
3249 
3250  // Increment skip_samples for the first non-zero audio edit list
3251  if (first_non_zero_audio_edit > 0 && st->codecpar->codec_id != AV_CODEC_ID_VORBIS) {
3252  st->skip_samples += frame_duration;
3253  msc->start_pad = st->skip_samples;
3254  }
3255  }
3256  }
3257  } else {
3258  if (min_corrected_pts < 0) {
3259  min_corrected_pts = edit_list_dts_counter + curr_ctts + msc->dts_shift;
3260  } else {
3261  min_corrected_pts = FFMIN(min_corrected_pts, edit_list_dts_counter + curr_ctts + msc->dts_shift);
3262  }
3263  if (edit_list_start_encountered == 0) {
3264  edit_list_start_encountered = 1;
3265  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3266  // discarded packets.
3267  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && frame_duration_buffer) {
3268  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3269  frame_duration_buffer, num_discarded_begin);
3270  av_freep(&frame_duration_buffer);
3271  }
3272  }
3273  }
3274 
3275  if (add_index_entry(st, current->pos, edit_list_dts_counter, current->size,
3276  current->min_distance, flags) == -1) {
3277  av_log(mov->fc, AV_LOG_ERROR, "Cannot add index entry\n");
3278  break;
3279  }
3280 
3281  // Update the index ranges array
3282  if (current_index_range < msc->index_ranges || index != current_index_range->end) {
3283  current_index_range++;
3284  current_index_range->start = index;
3285  }
3286  current_index_range->end = index + 1;
3287 
3288  // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list.
3289  if (edit_list_start_encountered > 0) {
3290  edit_list_dts_counter = edit_list_dts_counter + frame_duration;
3291  }
3292 
3293  // Break when found first key frame after edit entry completion
3294  if (((curr_cts + frame_duration) >= (edit_list_duration + edit_list_media_time)) &&
3295  ((flags & AVINDEX_KEYFRAME) || ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)))) {
3296 
3297  if (ctts_data_old && ctts_sample_old != 0) {
3298  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3299  &msc->ctts_allocated_size,
3300  ctts_sample_old - edit_list_start_ctts_sample,
3301  ctts_data_old[ctts_index_old].duration) == -1) {
3302  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3303  ctts_index_old, ctts_sample_old - edit_list_start_ctts_sample,
3304  ctts_data_old[ctts_index_old].duration);
3305  break;
3306  }
3307  }
3308  break;
3309  }
3310  }
3311  }
3312  // If there are empty edits, then min_corrected_pts might be positive intentionally. So we subtract the
3313  // sum duration of emtpy edits here.
3314  min_corrected_pts -= empty_edits_sum_duration;
3315 
3316  // If the minimum pts turns out to be greater than zero after fixing the index, then we subtract the
3317  // dts by that amount to make the first pts zero.
3318  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && min_corrected_pts > 0) {
3319  av_log(mov->fc, AV_LOG_DEBUG, "Offset DTS by %"PRId64" to make first pts zero.\n", min_corrected_pts);
3320  for (i = 0; i < st->nb_index_entries; ++i) {
3321  st->index_entries[i].timestamp -= min_corrected_pts;
3322  }
3323  }
3324 
3325  // Update av stream length
3326  st->duration = edit_list_dts_entry_end - start_dts;
3327 
3328  // Free the old index and the old CTTS structures
3329  av_free(e_old);
3330  av_free(ctts_data_old);
3331  av_freep(&frame_duration_buffer);
3332 
3333  // Null terminate the index ranges array
3334  current_index_range++;
3335  current_index_range->start = 0;
3336  current_index_range->end = 0;
3337  msc->current_index = msc->index_ranges[0].start;
3338 }
3339 
3340 static void mov_build_index(MOVContext *mov, AVStream *st)
3341 {
3342  MOVStreamContext *sc = st->priv_data;
3343  int64_t current_offset;
3344  int64_t current_dts = 0;
3345  unsigned int stts_index = 0;
3346  unsigned int stsc_index = 0;
3347  unsigned int stss_index = 0;
3348  unsigned int stps_index = 0;
3349  unsigned int i, j;
3350  uint64_t stream_size = 0;
3351  MOVStts *ctts_data_old = sc->ctts_data;
3352  unsigned int ctts_count_old = sc->ctts_count;
3353 
3354  if (sc->elst_count) {
3355  int i, edit_start_index = 0, multiple_edits = 0;
3356  int64_t empty_duration = 0; // empty duration of the first edit list entry
3357  int64_t start_time = 0; // start time of the media
3358 
3359  for (i = 0; i < sc->elst_count; i++) {
3360  const MOVElst *e = &sc->elst_data[i];
3361  if (i == 0 && e->time == -1) {
3362  /* if empty, the first entry is the start time of the stream
3363  * relative to the presentation itself */
3364  empty_duration = e->duration;
3365  edit_start_index = 1;
3366  } else if (i == edit_start_index && e->time >= 0) {
3367  start_time = e->time;
3368  } else {
3369  multiple_edits = 1;
3370  }
3371  }
3372 
3373  if (multiple_edits && !mov->advanced_editlist)
3374  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
3375  "Use -advanced_editlist to correctly decode otherwise "
3376  "a/v desync might occur\n");
3377 
3378  /* adjust first dts according to edit list */
3379  if ((empty_duration || start_time) && mov->time_scale > 0) {
3380  if (empty_duration)
3381  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
3382  sc->time_offset = start_time - empty_duration;
3383  if (!mov->advanced_editlist)
3384  current_dts = -sc->time_offset;
3385  }
3386 
3387  if (!multiple_edits && !mov->advanced_editlist &&
3388  st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
3389  sc->start_pad = start_time;
3390  }
3391 
3392  /* only use old uncompressed audio chunk demuxing when stts specifies it */
3393  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3394  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
3395  unsigned int current_sample = 0;
3396  unsigned int stts_sample = 0;
3397  unsigned int sample_size;
3398  unsigned int distance = 0;
3399  unsigned int rap_group_index = 0;
3400  unsigned int rap_group_sample = 0;
3401  int64_t last_dts = 0;
3402  int64_t dts_correction = 0;
3403  int rap_group_present = sc->rap_group_count && sc->rap_group;
3404  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
3405 
3406  current_dts -= sc->dts_shift;
3407  last_dts = current_dts;
3408 
3409  if (!sc->sample_count || st->nb_index_entries)
3410  return;
3411  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3412  return;
3414  st->nb_index_entries + sc->sample_count,
3415  sizeof(*st->index_entries)) < 0) {
3416  st->nb_index_entries = 0;
3417  return;
3418  }
3420 
3421  if (ctts_data_old) {
3422  // Expand ctts entries such that we have a 1-1 mapping with samples
3423  if (sc->sample_count >= UINT_MAX / sizeof(*sc->ctts_data))
3424  return;
3425  sc->ctts_count = 0;
3426  sc->ctts_allocated_size = 0;
3428  sc->sample_count * sizeof(*sc->ctts_data));
3429  if (!sc->ctts_data) {
3430  av_free(ctts_data_old);
3431  return;
3432  }
3433  for (i = 0; i < ctts_count_old &&
3434  sc->ctts_count < sc->sample_count; i++)
3435  for (j = 0; j < ctts_data_old[i].count &&
3436  sc->ctts_count < sc->sample_count; j++)
3437  add_ctts_entry(&sc->ctts_data, &sc->ctts_count,
3438  &sc->ctts_allocated_size, 1,
3439  ctts_data_old[i].duration);
3440  av_free(ctts_data_old);
3441  }
3442 
3443  for (i = 0; i < sc->chunk_count; i++) {
3444  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
3445  current_offset = sc->chunk_offsets[i];
3446  while (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3447  i + 1 == sc->stsc_data[stsc_index + 1].first)
3448  stsc_index++;
3449 
3450  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
3451  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
3452  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
3453  sc->stsz_sample_size = sc->sample_size;
3454  }
3455  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
3456  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
3457  sc->stsz_sample_size = sc->sample_size;
3458  }
3459 
3460  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
3461  int keyframe = 0;
3462  if (current_sample >= sc->sample_count) {
3463  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
3464  return;
3465  }
3466 
3467  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
3468  keyframe = 1;
3469  if (stss_index + 1 < sc->keyframe_count)
3470  stss_index++;
3471  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
3472  keyframe = 1;
3473  if (stps_index + 1 < sc->stps_count)
3474  stps_index++;
3475  }
3476  if (rap_group_present && rap_group_index < sc->rap_group_count) {
3477  if (sc->rap_group[rap_group_index].index > 0)
3478  keyframe = 1;
3479  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
3480  rap_group_sample = 0;
3481  rap_group_index++;
3482  }
3483  }
3484  if (sc->keyframe_absent
3485  && !sc->stps_count
3486  && !rap_group_present
3487  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
3488  keyframe = 1;
3489  if (keyframe)
3490  distance = 0;
3491  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
3492  if (sc->pseudo_stream_id == -1 ||
3493  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
3494  AVIndexEntry *e;
3495  if (sample_size > 0x3FFFFFFF) {
3496  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
3497  return;
3498  }
3499  e = &st->index_entries[st->nb_index_entries++];
3500  e->pos = current_offset;
3501  e->timestamp = current_dts;
3502  e->size = sample_size;
3503  e->min_distance = distance;
3504  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
3505  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
3506  "size %u, distance %u, keyframe %d\n", st->index, current_sample,
3507  current_offset, current_dts, sample_size, distance, keyframe);
3508  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
3509  ff_rfps_add_frame(mov->fc, st, current_dts);
3510  }
3511 
3512  current_offset += sample_size;
3513  stream_size += sample_size;
3514 
3515  /* A negative sample duration is invalid based on the spec,
3516  * but some samples need it to correct the DTS. */
3517  if (sc->stts_data[stts_index].duration < 0) {
3518  av_log(mov->fc, AV_LOG_WARNING,
3519  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
3520  sc->stts_data[stts_index].duration, stts_index,
3521  st->index);
3522  dts_correction += sc->stts_data[stts_index].duration - 1;
3523  sc->stts_data[stts_index].duration = 1;
3524  }
3525  current_dts += sc->stts_data[stts_index].duration;
3526  if (!dts_correction || current_dts + dts_correction > last_dts) {
3527  current_dts += dts_correction;
3528  dts_correction = 0;
3529  } else {
3530  /* Avoid creating non-monotonous DTS */
3531  dts_correction += current_dts - last_dts - 1;
3532  current_dts = last_dts + 1;
3533  }
3534  last_dts = current_dts;
3535  distance++;
3536  stts_sample++;
3537  current_sample++;
3538  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
3539  stts_sample = 0;
3540  stts_index++;
3541  }
3542  }
3543  }
3544  if (st->duration > 0)
3545  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
3546  } else {
3547  unsigned chunk_samples, total = 0;
3548 
3549  // compute total chunk count
3550  for (i = 0; i < sc->stsc_count; i++) {
3551  unsigned count, chunk_count;
3552 
3553  chunk_samples = sc->stsc_data[i].count;
3554  if (i != sc->stsc_count - 1 &&
3555  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
3556  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
3557  return;
3558  }
3559 
3560  if (sc->samples_per_frame >= 160) { // gsm
3561  count = chunk_samples / sc->samples_per_frame;
3562  } else if (sc->samples_per_frame > 1) {
3563  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
3564  count = (chunk_samples+samples-1) / samples;
3565  } else {
3566  count = (chunk_samples+1023) / 1024;
3567  }
3568 
3569  if (mov_stsc_index_valid(i, sc->stsc_count))
3570  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
3571  else
3572  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
3573  total += chunk_count * count;
3574  }
3575 
3576  av_log(mov->fc, AV_LOG_TRACE, "chunk count %u\n", total);
3577  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3578  return;
3580  st->nb_index_entries + total,
3581  sizeof(*st->index_entries)) < 0) {
3582  st->nb_index_entries = 0;
3583  return;
3584  }
3585  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
3586 
3587  // populate index
3588  for (i = 0; i < sc->chunk_count; i++) {
3589  current_offset = sc->chunk_offsets[i];
3590  if (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3591  i + 1 == sc->stsc_data[stsc_index + 1].first)
3592  stsc_index++;
3593  chunk_samples = sc->stsc_data[stsc_index].count;
3594 
3595  while (chunk_samples > 0) {
3596  AVIndexEntry *e;
3597  unsigned size, samples;
3598 
3599  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3601  "Zero bytes per frame, but %d samples per frame",
3602  sc->samples_per_frame);
3603  return;
3604  }
3605 
3606  if (sc->samples_per_frame >= 160) { // gsm
3607  samples = sc->samples_per_frame;
3608  size = sc->bytes_per_frame;
3609  } else {
3610  if (sc->samples_per_frame > 1) {
3611  samples = FFMIN((1024 / sc->samples_per_frame)*
3612  sc->samples_per_frame, chunk_samples);
3613  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3614  } else {
3615  samples = FFMIN(1024, chunk_samples);
3616  size = samples * sc->sample_size;
3617  }
3618  }
3619 
3620  if (st->nb_index_entries >= total) {
3621  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %u\n", total);
3622  return;
3623  }
3624  if (size > 0x3FFFFFFF) {
3625  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
3626  return;
3627  }
3628  e = &st->index_entries[st->nb_index_entries++];
3629  e->pos = current_offset;
3630  e->timestamp = current_dts;
3631  e->size = size;
3632  e->min_distance = 0;
3633  e->flags = AVINDEX_KEYFRAME;
3634  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %u, offset %"PRIx64", dts %"PRId64", "
3635  "size %u, duration %u\n", st->index, i, current_offset, current_dts,
3636  size, samples);
3637 
3638  current_offset += size;
3639  current_dts += samples;
3640  chunk_samples -= samples;
3641  }
3642  }
3643  }
3644 
3645  if (!mov->ignore_editlist && mov->advanced_editlist) {
3646  // Fix index according to edit lists.
3647  mov_fix_index(mov, st);
3648  }
3649 }
3650 
3651 static int test_same_origin(const char *src, const char *ref) {
3652  char src_proto[64];
3653  char ref_proto[64];
3654  char src_auth[256];
3655  char ref_auth[256];
3656  char src_host[256];
3657  char ref_host[256];
3658  int src_port=-1;
3659  int ref_port=-1;
3660 
3661  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
3662  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
3663 
3664  if (strlen(src) == 0) {
3665  return -1;
3666  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
3667  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
3668  strlen(src_host) + 1 >= sizeof(src_host) ||
3669  strlen(ref_host) + 1 >= sizeof(ref_host)) {
3670  return 0;
3671  } else if (strcmp(src_proto, ref_proto) ||
3672  strcmp(src_auth, ref_auth) ||
3673  strcmp(src_host, ref_host) ||
3674  src_port != ref_port) {
3675  return 0;
3676  } else
3677  return 1;
3678 }
3679 
3680 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
3681 {
3682  /* try relative path, we do not try the absolute because it can leak information about our
3683  system to an attacker */
3684  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
3685  char filename[1025];
3686  const char *src_path;
3687  int i, l;
3688 
3689  /* find a source dir */
3690  src_path = strrchr(src, '/');
3691  if (src_path)
3692  src_path++;
3693  else
3694  src_path = src;
3695 
3696  /* find a next level down to target */
3697  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
3698  if (ref->path[l] == '/') {
3699  if (i == ref->nlvl_to - 1)
3700  break;
3701  else
3702  i++;
3703  }
3704 
3705  /* compose filename if next level down to target was found */
3706  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3707  memcpy(filename, src, src_path - src);
3708  filename[src_path - src] = 0;
3709 
3710  for (i = 1; i < ref->nlvl_from; i++)
3711  av_strlcat(filename, "../", sizeof(filename));
3712 
3713  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3714  if (!c->use_absolute_path) {
3715  int same_origin = test_same_origin(src, filename);
3716 
3717  if (!same_origin) {
3718  av_log(c->fc, AV_LOG_ERROR,
3719  "Reference with mismatching origin, %s not tried for security reasons, "
3720  "set demuxer option use_absolute_path to allow it anyway\n",
3721  ref->path);
3722  return AVERROR(ENOENT);
3723  }
3724 
3725  if(strstr(ref->path + l + 1, "..") ||
3726  strstr(ref->path + l + 1, ":") ||
3727  (ref->nlvl_from > 1 && same_origin < 0) ||
3728  (filename[0] == '/' && src_path == src))
3729  return AVERROR(ENOENT);
3730  }
3731 
3732  if (strlen(filename) + 1 == sizeof(filename))
3733  return AVERROR(ENOENT);
3734  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3735  return 0;
3736  }
3737  } else if (c->use_absolute_path) {
3738  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3739  "this is a possible security issue\n");
3740  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3741  return 0;
3742  } else {
3743  av_log(c->fc, AV_LOG_ERROR,
3744  "Absolute path %s not tried for security reasons, "
3745  "set demuxer option use_absolute_path to allow absolute paths\n",
3746  ref->path);
3747  }
3748 
3749  return AVERROR(ENOENT);
3750 }
3751 
3753 {
3754  if (sc->time_scale <= 0) {
3755  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3756  sc->time_scale = c->time_scale;
3757  if (sc->time_scale <= 0)
3758  sc->time_scale = 1;
3759  }
3760 }
3761 
3763 {
3764  AVStream *st;
3765  MOVStreamContext *sc;
3766  int ret;
3767 
3768  st = avformat_new_stream(c->fc, NULL);
3769  if (!st) return AVERROR(ENOMEM);
3770  st->id = c->fc->nb_streams;
3771  sc = av_mallocz(sizeof(MOVStreamContext));
3772  if (!sc) return AVERROR(ENOMEM);
3773 
3774  st->priv_data = sc;
3776  sc->ffindex = st->index;
3777  c->trak_index = st->index;
3778 
3779  if ((ret = mov_read_default(c, pb, atom)) < 0)
3780  return ret;
3781 
3782  c->trak_index = -1;
3783 
3784  /* sanity checks */
3785  if ((sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3786  (!sc->sample_size && !sc->sample_count))) ||
3787  (!sc->chunk_count && sc->sample_count)) {
3788  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3789  st->index);
3790  return 0;
3791  }
3792 
3793  fix_timescale(c, sc);
3794 
3795  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3796 
3797  mov_build_index(c, st);
3798 
3799  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3800  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3801  if (c->enable_drefs) {
3802  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3803  av_log(c->fc, AV_LOG_ERROR,
3804  "stream %d, error opening alias: path='%s', dir='%s', "
3805  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3806  st->index, dref->path, dref->dir, dref->filename,
3807  dref->volume, dref->nlvl_from, dref->nlvl_to);
3808  } else {
3809  av_log(c->fc, AV_LOG_WARNING,
3810  "Skipped opening external track: "
3811  "stream %d, alias: path='%s', dir='%s', "
3812  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3813  "Set enable_drefs to allow this.\n",
3814  st->index, dref->path, dref->dir, dref->filename,
3815  dref->volume, dref->nlvl_from, dref->nlvl_to);
3816  }
3817  } else {
3818  sc->pb = c->fc->pb;
3819  sc->pb_is_copied = 1;
3820  }
3821 
3822  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3823  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3824  sc->height && sc->width &&
3825  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3826  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3827  ((double)st->codecpar->width * sc->height), INT_MAX);
3828  }
3829 
3830 #if FF_API_R_FRAME_RATE
3831  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3833  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3834 #endif
3835  }
3836 
3837  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3838  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3839  TAG_IS_AVCI(st->codecpar->codec_tag)) {
3840  ret = ff_generate_avci_extradata(st);
3841  if (ret < 0)
3842  return ret;
3843  }
3844 
3845  switch (st->codecpar->codec_id) {
3846 #if CONFIG_H261_DECODER
3847  case AV_CODEC_ID_H261:
3848 #endif
3849 #if CONFIG_H263_DECODER
3850  case AV_CODEC_ID_H263:
3851 #endif
3852 #if CONFIG_MPEG4_DECODER
3853  case AV_CODEC_ID_MPEG4:
3854 #endif
3855  st->codecpar->width = 0; /* let decoder init width/height */
3856  st->codecpar->height= 0;
3857  break;
3858  }
3859 
3860  // If the duration of the mp3 packets is not constant, then they could need a parser
3861  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3862  && sc->stts_count > 3
3863  && sc->stts_count*10 > st->nb_frames
3864  && sc->time_scale == st->codecpar->sample_rate) {
3866  }
3867  /* Do not need those anymore. */
3868  av_freep(&sc->chunk_offsets);
3869  av_freep(&sc->sample_sizes);
3870  av_freep(&sc->keyframes);
3871  av_freep(&sc->stts_data);
3872  av_freep(&sc->stps_data);
3873  av_freep(&sc->elst_data);
3874  av_freep(&sc->rap_group);
3875 
3876  return 0;
3877 }
3878 
3880 {
3881  int ret;
3882  c->itunes_metadata = 1;
3883  ret = mov_read_default(c, pb, atom);
3884  c->itunes_metadata = 0;
3885  return ret;
3886 }
3887 
3889 {
3890  uint32_t count;
3891  uint32_t i;
3892 
3893  if (atom.size < 8)
3894  return 0;
3895 
3896  avio_skip(pb, 4);
3897  count = avio_rb32(pb);
3898  if (count > UINT_MAX / sizeof(*c->meta_keys) - 1) {
3899  av_log(c->fc, AV_LOG_ERROR,
3900  "The 'keys' atom with the invalid key count: %"PRIu32"\n", count);
3901  return AVERROR_INVALIDDATA;
3902  }
3903 
3904  c->meta_keys_count = count + 1;
3905  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3906  if (!c->meta_keys)
3907  return AVERROR(ENOMEM);
3908 
3909  for (i = 1; i <= count; ++i) {
3910  uint32_t key_size = avio_rb32(pb);
3911  uint32_t type = avio_rl32(pb);
3912  if (key_size < 8) {
3913  av_log(c->fc, AV_LOG_ERROR,
3914  "The key# %"PRIu32" in meta has invalid size:"
3915  "%"PRIu32"\n", i, key_size);
3916  return AVERROR_INVALIDDATA;
3917  }
3918  key_size -= 8;
3919  if (type != MKTAG('m','d','t','a')) {
3920  avio_skip(pb, key_size);
3921  }
3922  c->meta_keys[i] = av_mallocz(key_size + 1);
3923  if (!c->meta_keys[i])
3924  return AVERROR(ENOMEM);
3925  avio_read(pb, c->meta_keys[i], key_size);
3926  }
3927 
3928  return 0;
3929 }
3930 
3932 {
3933  int64_t end = avio_tell(pb) + atom.size;
3934  uint8_t *key = NULL, *val = NULL, *mean = NULL;
3935  int i;
3936  int ret = 0;
3937  AVStream *st;
3938  MOVStreamContext *sc;
3939 
3940  if (c->fc->nb_streams < 1)
3941  return 0;
3942  st = c->fc->streams[c->fc->nb_streams-1];
3943  sc = st->priv_data;
3944 
3945  for (i = 0; i < 3; i++) {
3946  uint8_t **p;
3947  uint32_t len, tag;
3948 
3949  if (end - avio_tell(pb) <= 12)
3950  break;
3951 
3952  len = avio_rb32(pb);
3953  tag = avio_rl32(pb);
3954  avio_skip(pb, 4); // flags
3955 
3956  if (len < 12 || len - 12 > end - avio_tell(pb))
3957  break;
3958  len -= 12;
3959 
3960  if (tag == MKTAG('m', 'e', 'a', 'n'))
3961  p = &mean;
3962  else if (tag == MKTAG('n', 'a', 'm', 'e'))
3963  p = &key;
3964  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3965  avio_skip(pb, 4);
3966  len -= 4;
3967  p = &val;
3968  } else
3969  break;
3970 
3971  *p = av_malloc(len + 1);
3972  if (!*p)
3973  break;
3974  ret = ffio_read_size(pb, *p, len);
3975  if (ret < 0) {
3976  av_freep(p);
3977  break;
3978  }
3979  (*p)[len] = 0;
3980  }
3981 
3982  if (mean && key && val) {
3983  if (strcmp(key, "iTunSMPB") == 0) {
3984  int priming, remainder, samples;
3985  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3986  if(priming>0 && priming<16384)
3987  sc->start_pad = priming;
3988  }
3989  }
3990  if (strcmp(key, "cdec") != 0) {
3991  av_dict_set(&c->fc->metadata, key, val,
3993  key = val = NULL;
3994  }
3995  } else {
3996  av_log(c->fc, AV_LOG_VERBOSE,
3997  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3998  }
3999 
4000  avio_seek(pb, end, SEEK_SET);
4001  av_freep(&key);
4002  av_freep(&val);
4003  av_freep(&mean);
4004  return ret;
4005 }
4006 
4008 {
4009  while (atom.size > 8) {
4010  uint32_t tag = avio_rl32(pb);
4011  atom.size -= 4;
4012  if (tag == MKTAG('h','d','l','r')) {
4013  avio_seek(pb, -8, SEEK_CUR);
4014  atom.size += 8;
4015  return mov_read_default(c, pb, atom);
4016  }
4017  }
4018  return 0;
4019 }
4020 
4021 // return 1 when matrix is identity, 0 otherwise
4022 #define IS_MATRIX_IDENT(matrix) \
4023  ( (matrix)[0][0] == (1 << 16) && \
4024  (matrix)[1][1] == (1 << 16) && \
4025  (matrix)[2][2] == (1 << 30) && \
4026  !(matrix)[0][1] && !(matrix)[0][2] && \
4027  !(matrix)[1][0] && !(matrix)[1][2] && \
4028  !(matrix)[2][0] && !(matrix)[2][1])
4029 
4031 {
4032  int i, j, e;
4033  int width;
4034  int height;
4035  int display_matrix[3][3];
4036  int res_display_matrix[3][3] = { { 0 } };
4037  AVStream *st;
4038  MOVStreamContext *sc;
4039  int version;
4040  int flags;
4041 
4042  if (c->fc->nb_streams < 1)
4043  return 0;
4044  st = c->fc->streams[c->fc->nb_streams-1];
4045  sc = st->priv_data;
4046 
4047  version = avio_r8(pb);
4048  flags = avio_rb24(pb);
4050 
4051  if (version == 1) {
4052  avio_rb64(pb);
4053  avio_rb64(pb);
4054  } else {
4055  avio_rb32(pb); /* creation time */
4056  avio_rb32(pb); /* modification time */
4057  }
4058  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
4059  avio_rb32(pb); /* reserved */
4060 
4061  /* highlevel (considering edits) duration in movie timebase */
4062  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
4063  avio_rb32(pb); /* reserved */
4064  avio_rb32(pb); /* reserved */
4065 
4066  avio_rb16(pb); /* layer */
4067  avio_rb16(pb); /* alternate group */
4068  avio_rb16(pb); /* volume */
4069  avio_rb16(pb); /* reserved */
4070 
4071  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
4072  // they're kept in fixed point format through all calculations
4073  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
4074  // side data, but the scale factor is not needed to calculate aspect ratio
4075  for (i = 0; i < 3; i++) {
4076  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
4077  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
4078  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
4079  }
4080 
4081  width = avio_rb32(pb); // 16.16 fixed point track width
4082  height = avio_rb32(pb); // 16.16 fixed point track height
4083  sc->width = width >> 16;
4084  sc->height = height >> 16;
4085 
4086  // apply the moov display matrix (after the tkhd one)
4087  for (i = 0; i < 3; i++) {
4088  const int sh[3] = { 16, 16, 30 };
4089  for (j = 0; j < 3; j++) {
4090  for (e = 0; e < 3; e++) {
4091  res_display_matrix[i][j] +=
4092  ((int64_t) display_matrix[i][e] *
4093  c->movie_display_matrix[e][j]) >> sh[e];
4094  }
4095  }
4096  }
4097 
4098  // save the matrix when it is not the default identity
4099  if (!IS_MATRIX_IDENT(res_display_matrix)) {
4100  double rotate;
4101 
4102  av_freep(&sc->display_matrix);
4103  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
4104  if (!sc->display_matrix)
4105  return AVERROR(ENOMEM);
4106 
4107  for (i = 0; i < 3; i++)
4108  for (j = 0; j < 3; j++)
4109  sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
4110 
4113  if (!isnan(rotate)) {
4114  char rotate_buf[64];
4115  rotate = -rotate;
4116  if (rotate < 0) // for backward compatibility
4117  rotate += 360;
4118  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
4119  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
4120  }
4121 #endif
4122  }
4123 
4124  // transform the display width/height according to the matrix
4125  // to keep the same scale, use [width height 1<<16]
4126  if (width && height && sc->display_matrix) {
4127  double disp_transform[2];
4128 
4129  for (i = 0; i < 2; i++)
4130  disp_transform[i] = hypot(sc->display_matrix[0 + i],
4131  sc->display_matrix[3 + i]);
4132 
4133  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
4134  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
4135  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
4137  disp_transform[0] / disp_transform[1],
4138  INT_MAX);
4139  }
4140  return 0;
4141 }
4142 
4144 {
4145  MOVFragment *frag = &c->fragment;
4146  MOVTrackExt *trex = NULL;
4148  int flags, track_id, i, found = 0;
4149 
4150  avio_r8(pb); /* version */
4151  flags = avio_rb24(pb);
4152 
4153  track_id = avio_rb32(pb);
4154  if (!track_id)
4155  return AVERROR_INVALIDDATA;
4156  frag->track_id = track_id;
4157  for (i = 0; i < c->trex_count; i++)
4158  if (c->trex_data[i].track_id == frag->track_id) {
4159  trex = &c->trex_data[i];
4160  break;
4161  }
4162  if (!trex) {
4163  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
4164  return AVERROR_INVALIDDATA;
4165  }
4166 
4169  frag->moof_offset : frag->implicit_offset;
4170  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
4171 
4172  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
4173  avio_rb32(pb) : trex->duration;
4174  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
4175  avio_rb32(pb) : trex->size;
4176  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
4177  avio_rb32(pb) : trex->flags;
4178  frag->time = AV_NOPTS_VALUE;
4179  for (i = 0; i < c->fragment_index_count; i++) {
4180  int j;
4181  MOVFragmentIndex* candidate = c->fragment_index_data[i];
4182  if (candidate->track_id == frag->track_id) {
4183  av_log(c->fc, AV_LOG_DEBUG,
4184  "found fragment index for track %u\n", frag->track_id);
4185  index = candidate;
4186  for (j = index->current_item; j < index->item_count; j++) {
4187  if (frag->implicit_offset == index->items[j].moof_offset) {
4188  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
4189  "for track %u and moof_offset %"PRId64"\n",
4190  frag->track_id, index->items[j].moof_offset);
4191  frag->time = index->items[j].time;
4192  index->current_item = j + 1;
4193  found = 1;
4194  break;
4195  }
4196  }
4197  if (found)
4198  break;
4199  }
4200  }
4201  if (index && !found) {
4202  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
4203  "it doesn't have an (in-order) entry for moof_offset "
4204  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
4205  }
4206  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
4207  return 0;
4208 }
4209 
4211 {
4212  unsigned i, num;
4213  void *new_tracks;
4214 
4215  num = atom.size / 4;
4216  if (!(new_tracks = av_malloc_array(num, sizeof(int))))
4217  return AVERROR(ENOMEM);
4218 
4219  av_free(c->chapter_tracks);
4220  c->chapter_tracks = new_tracks;
4221  c->nb_chapter_tracks = num;
4222 
4223  for (i = 0; i < num && !pb->eof_reached; i++)
4224  c->chapter_tracks[i] = avio_rb32(pb);
4225 
4226  return 0;
4227 }
4228 
4230 {
4231  MOVTrackExt *trex;
4232  int err;
4233 
4234  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
4235  return AVERROR_INVALIDDATA;
4236  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
4237  sizeof(*c->trex_data))) < 0) {
4238  c->trex_count = 0;
4239  return err;
4240  }
4241 
4242  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
4243 
4244  trex = &c->trex_data[c->trex_count++];
4245  avio_r8(pb); /* version */
4246  avio_rb24(pb); /* flags */
4247  trex->track_id = avio_rb32(pb);
4248  trex->stsd_id = avio_rb32(pb);
4249  trex->duration = avio_rb32(pb);
4250  trex->size = avio_rb32(pb);
4251  trex->flags = avio_rb32(pb);
4252  return 0;
4253 }
4254 
4256 {
4257  MOVFragment *frag = &c->fragment;
4258  AVStream *st = NULL;
4259  MOVStreamContext *sc;
4260  int version, i;
4261 
4262  for (i = 0; i < c->fc->nb_streams; i++) {
4263  if (c->fc->streams[i]->id == frag->track_id) {
4264  st = c->fc->streams[i];
4265  break;
4266  }
4267  }
4268  if (!st) {
4269  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4270  return AVERROR_INVALIDDATA;
4271  }
4272  sc = st->priv_data;
4273  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
4274  return 0;
4275  version = avio_r8(pb);
4276  avio_rb24(pb); /* flags */
4277  if (version) {
4278  sc->track_end = avio_rb64(pb);
4279  } else {
4280  sc->track_end = avio_rb32(pb);
4281  }
4282  return 0;
4283 }
4284 
4286 {
4287  MOVFragment *frag = &c->fragment;
4288  AVStream *st = NULL;
4289  MOVStreamContext *sc;
4290  MOVStts *ctts_data;
4291  uint64_t offset;
4292  int64_t dts;
4293  int data_offset = 0;
4294  unsigned entries, first_sample_flags = frag->flags;
4295  int flags, distance, i;
4296 
4297  for (i = 0; i < c->fc->nb_streams; i++) {
4298  if (c->fc->streams[i]->id == frag->track_id) {
4299  st = c->fc->streams[i];
4300  break;
4301  }
4302  }
4303  if (!st) {
4304  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4305  return AVERROR_INVALIDDATA;
4306  }
4307  sc = st->priv_data;
4308  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4309  return 0;
4310  avio_r8(pb); /* version */
4311  flags = avio_rb24(pb);
4312  entries = avio_rb32(pb);
4313  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %u\n", flags, entries);
4314 
4315  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
4316  return AVERROR_INVALIDDATA;
4317  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
4318  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
4319  dts = sc->track_end - sc->time_offset;
4320  offset = frag->base_data_offset + data_offset;
4321  distance = 0;
4322  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
4323  for (i = 0; i < entries && !pb->eof_reached; i++) {
4324  unsigned sample_size = frag->size;
4325  int sample_flags = i ? frag->flags : first_sample_flags;
4326  unsigned sample_duration = frag->duration;
4327  unsigned ctts_duration = 0;
4328  int keyframe = 0;
4329  int ctts_index = 0;
4330  int old_nb_index_entries = st->nb_index_entries;
4331 
4332  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
4333  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
4334  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
4335  if (flags & MOV_TRUN_SAMPLE_CTS) ctts_duration = avio_rb32(pb);
4336 
4337  mov_update_dts_shift(sc, ctts_duration);
4338  if (frag->time != AV_NOPTS_VALUE) {
4339  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
4340  int64_t pts = frag->time;
4341  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4342  " sc->dts_shift %d ctts.duration %d"
4343  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
4344  sc->dts_shift, ctts_duration,
4345  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
4346  dts = pts - sc->dts_shift;
4347  if (flags & MOV_TRUN_SAMPLE_CTS) {
4348  dts -= ctts_duration;
4349  } else {
4350  dts -= sc->time_offset;
4351  }
4352  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
4353  } else {
4354  dts = frag->time - sc->time_offset;
4355  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4356  ", using it for dts\n", dts);
4357  }
4358  frag->time = AV_NOPTS_VALUE;
4359  }
4360 
4362  keyframe = 1;
4363  else
4364  keyframe =
4365  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
4367  if (keyframe)
4368  distance = 0;
4369  ctts_index = av_add_index_entry(st, offset, dts, sample_size, distance,
4370  keyframe ? AVINDEX_KEYFRAME : 0);
4371  if (ctts_index >= 0 && old_nb_index_entries < st->nb_index_entries) {
4372  unsigned int size_needed = st->nb_index_entries * sizeof(*sc->ctts_data);
4373  unsigned int request_size = size_needed > sc->ctts_allocated_size ?
4374  FFMAX(size_needed, 2 * sc->ctts_allocated_size) : size_needed;
4375  unsigned int old_ctts_size = sc->ctts_allocated_size;
4376  ctts_data = av_fast_realloc(sc->ctts_data, &sc->ctts_allocated_size, request_size);
4377  if (!ctts_data) {
4378  av_freep(&sc->ctts_data);
4379  return AVERROR(ENOMEM);
4380  }
4381  sc->ctts_data = ctts_data;
4382 
4383  // In case there were samples without ctts entries, ensure they get
4384  // zero valued entries. This ensures clips which mix boxes with and
4385  // without ctts entries don't pickup uninitialized data.
4386  memset((uint8_t*)(sc->ctts_data) + old_ctts_size, 0, sc->ctts_allocated_size - old_ctts_size);
4387 
4388  if (ctts_index != old_nb_index_entries) {
4389  memmove(sc->ctts_data + ctts_index + 1, sc->ctts_data + ctts_index,
4390  sizeof(*sc->ctts_data) * (sc->ctts_count - ctts_index));
4391  if (ctts_index <= sc->current_sample) {
4392  // if we inserted a new item before the current sample, move the
4393  // counter ahead so it is still pointing to the same sample.
4394  sc->current_sample++;
4395  }
4396  }
4397 
4398  sc->ctts_data[ctts_index].count = 1;
4399  sc->ctts_data[ctts_index].duration = ctts_duration;
4400  sc->ctts_count++;
4401  } else {
4402  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
4403  }
4404 
4405  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
4406  "size %u, distance %d, keyframe %d\n", st->index, ctts_index,
4407  offset, dts, sample_size, distance, keyframe);
4408  distance++;
4409  dts += sample_duration;
4410  offset += sample_size;
4411  sc->data_size += sample_size;
4412  sc->duration_for_fps += sample_duration;
4413  sc->nb_frames_for_fps ++;
4414  }
4415 
4416  if (pb->eof_reached)
4417  return AVERROR_EOF;
4418 
4419  frag->implicit_offset = offset;
4420 
4421  sc->track_end = dts + sc->time_offset;
4422  if (st->duration < sc->track_end)
4423  st->duration = sc->track_end;
4424 
4425  return 0;
4426 }
4427 
4429 {
4430  int64_t offset = avio_tell(pb) + atom.size, pts;
4431  uint8_t version;
4432  unsigned i, track_id;
4433  AVStream *st = NULL;
4434  AVStream *ref_st = NULL;
4435  MOVStreamContext *sc, *ref_sc = NULL;
4438  AVRational timescale;
4439 
4440  version = avio_r8(pb);
4441  if (version > 1) {
4442  avpriv_request_sample(c->fc, "sidx version %u", version);
4443  return 0;
4444  }
4445 
4446  avio_rb24(pb); // flags
4447 
4448  track_id = avio_rb32(pb); // Reference ID
4449  for (i = 0; i < c->fc->nb_streams; i++) {
4450  if (c->fc->streams[i]->id == track_id) {
4451  st = c->fc->streams[i];
4452  break;
4453  }
4454  }
4455  if (!st) {
4456  av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
4457  return 0;
4458  }
4459 
4460  sc = st->priv_data;
4461 
4462  timescale = av_make_q(1, avio_rb32(pb));
4463 
4464  if (timescale.den <= 0) {
4465  av_log(c->fc, AV_LOG_ERROR, "Invalid sidx timescale 1/%d\n", timescale.den);
4466  return AVERROR_INVALIDDATA;
4467  }
4468 
4469  if (version == 0) {
4470  pts = avio_rb32(pb);
4471  offset += avio_rb32(pb);
4472  } else {
4473  pts = avio_rb64(pb);
4474  offset += avio_rb64(pb);
4475  }
4476 
4477  avio_rb16(pb); // reserved
4478 
4479  index = av_mallocz(sizeof(MOVFragmentIndex));
4480  if (!index)
4481  return AVERROR(ENOMEM);
4482 
4483  index->track_id = track_id;
4484 
4485  index->item_count = avio_rb16(pb);
4486  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
4487 
4488  if (!index->items) {
4489  av_freep(&index);
4490  return AVERROR(ENOMEM);
4491  }
4492 
4493  for (i = 0; i < index->item_count; i++) {
4494  uint32_t size = avio_rb32(pb);
4495  uint32_t duration = avio_rb32(pb);
4496  if (size & 0x80000000) {
4497  avpriv_request_sample(c->fc, "sidx reference_type 1");
4498  av_freep(&index->items);
4499  av_freep(&index);
4500  return AVERROR_PATCHWELCOME;
4501  }
4502  avio_rb32(pb); // sap_flags
4503  index->items[i].moof_offset = offset;
4504  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
4505  offset += size;
4506  pts += duration;
4507  }
4508 
4509  st->duration = sc->track_end = pts;
4510 
4512  c->fragment_index_count + 1,
4513  sizeof(MOVFragmentIndex*));
4514  if (!tmp) {
4515  av_freep(&index->items);
4516  av_freep(&index);
4517  return AVERROR(ENOMEM);
4518  }
4519 
4520  c->fragment_index_data = tmp;
4522  sc->has_sidx = 1;
4523 
4524  if (offset == avio_size(pb)) {
4525  for (i = 0; i < c->fc->nb_streams; i++) {
4526  if (c->fc->streams[i]->id == c->fragment_index_data[0]->track_id) {
4527  ref_st = c->fc->streams[i];
4528  ref_sc = ref_st->priv_data;
4529  break;
4530  }
4531  }
4532  for (i = 0; i < c->fc->nb_streams; i++) {
4533  st = c->fc->streams[i];
4534  sc = st->priv_data;
4535  if (!sc->has_sidx) {
4536  st->duration = sc->track_end = av_rescale(ref_st->duration, sc->time_scale, ref_sc->time_scale);
4537  }
4538  }
4539 
4540  c->fragment_index_complete = 1;
4541  }
4542 
4543  return 0;
4544 }
4545 
4546 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
4547 /* like the files created with Adobe Premiere 5.0, for samples see */
4548 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
4550 {
4551  int err;
4552 
4553  if (atom.size < 8)
4554  return 0; /* continue */
4555  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
4556  avio_skip(pb, atom.size - 4);
4557  return 0;
4558  }
4559  atom.type = avio_rl32(pb);
4560  atom.size -= 8;
4561  if (atom.type != MKTAG('m','d','a','t')) {
4562  avio_skip(pb, atom.size);
4563  return 0;
4564  }
4565  err = mov_read_mdat(c, pb, atom);
4566  return err;
4567 }
4568 
4570 {
4571 #if CONFIG_ZLIB
4572  AVIOContext ctx;
4573  uint8_t *cmov_data;
4574  uint8_t *moov_data; /* uncompressed data */
4575  long cmov_len, moov_len;
4576  int ret = -1;
4577 
4578  avio_rb32(pb); /* dcom atom */
4579  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
4580  return AVERROR_INVALIDDATA;
4581  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
4582  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
4583  return AVERROR_INVALIDDATA;
4584  }
4585  avio_rb32(pb); /* cmvd atom */
4586  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
4587  return AVERROR_INVALIDDATA;
4588  moov_len = avio_rb32(pb); /* uncompressed size */
4589  cmov_len = atom.size - 6 * 4;
4590 
4591  cmov_data = av_malloc(cmov_len);
4592  if (!cmov_data)
4593  return AVERROR(ENOMEM);
4594  moov_data = av_malloc(moov_len);
4595  if (!moov_data) {
4596  av_free(cmov_data);
4597  return AVERROR(ENOMEM);
4598  }
4599  ret = ffio_read_size(pb, cmov_data, cmov_len);
4600  if (ret < 0)
4601  goto free_and_return;
4602 
4603  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
4604  goto free_and_return;
4605  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
4606  goto free_and_return;
4608  atom.type = MKTAG('m','o','o','v');
4609  atom.size = moov_len;
4610  ret = mov_read_default(c, &ctx, atom);
4611 free_and_return:
4612  av_free(moov_data);
4613  av_free(cmov_data);
4614  return ret;
4615 #else
4616  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
4617  return AVERROR(ENOSYS);
4618 #endif
4619 }
4620 
4621 /* edit list atom */
4623 {
4624  MOVStreamContext *sc;
4625  int i, edit_count, version;
4626 
4627  if (c->fc->nb_streams < 1 || c->ignore_editlist)
4628  return 0;
4629  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
4630 
4631  version = avio_r8(pb); /* version */
4632  avio_rb24(pb); /* flags */
4633  edit_count = avio_rb32(pb); /* entries */
4634 
4635  if (!edit_count)
4636  return 0;
4637  if (sc->elst_data)
4638  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
4639  av_free(sc->elst_data);
4640  sc->elst_count = 0;
4641  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
4642  if (!sc->elst_data)
4643  return AVERROR(ENOMEM);
4644 
4645  av_log(c->fc, AV_LOG_TRACE, "track[%u].edit_count = %i\n", c->fc->nb_streams - 1, edit_count);
4646  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
4647  MOVElst *e = &sc->elst_data[i];
4648 
4649  if (version == 1) {
4650  e->duration = avio_rb64(pb);
4651  e->time = avio_rb64(pb);
4652  } else {
4653  e->duration = avio_rb32(pb); /* segment duration */
4654  e->time = (int32_t)avio_rb32(pb); /* media time */
4655  }
4656  e->rate = avio_rb32(pb) / 65536.0;
4657  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
4658  e->duration, e->time, e->rate);
4659 
4660  if (e->time < 0 && e->time != -1 &&
4662  av_log(c->fc, AV_LOG_ERROR, "Track %d, edit %d: Invalid edit list media time=%"PRId64"\n",
4663  c->fc->nb_streams-1, i, e->time);
4664  return AVERROR_INVALIDDATA;
4665  }
4666  }
4667  sc->elst_count = i;
4668 
4669  return 0;
4670 }
4671 
4673 {
4674  MOVStreamContext *sc;
4675 
4676  if (c->fc->nb_streams < 1)
4677  return AVERROR_INVALIDDATA;
4678  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4679  sc->timecode_track = avio_rb32(pb);
4680  return 0;
4681 }
4682 
4684 {
4685  AVStream *st;
4686  int version, color_range, color_primaries, color_trc, color_space;
4687 
4688  if (c->fc->nb_streams < 1)
4689  return 0;
4690  st = c->fc->streams[c->fc->nb_streams - 1];
4691 
4692  if (atom.size < 5) {
4693  av_log(c->fc, AV_LOG_ERROR, "Empty VP Codec Configuration box\n");
4694  return AVERROR_INVALIDDATA;
4695  }
4696 
4697  version = avio_r8(pb);
4698  if (version != 1) {
4699  av_log(c->fc, AV_LOG_WARNING, "Unsupported VP Codec Configuration box version %d\n", version);
4700  return 0;
4701  }
4702  avio_skip(pb, 3); /* flags */
4703 
4704  avio_skip(pb, 2); /* profile + level */
4705  color_range = avio_r8(pb); /* bitDepth, chromaSubsampling, videoFullRangeFlag */
4706  color_primaries = avio_r8(pb);
4707  color_trc = avio_r8(pb);
4708  color_space = avio_r8(pb);
4709  if (avio_rb16(pb)) /* codecIntializationDataSize */
4710  return AVERROR_INVALIDDATA;
4711 
4712