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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/avstring.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/display.h"
40 #include "libavutil/opt.h"
41 #include "libavutil/aes.h"
42 #include "libavutil/aes_ctr.h"
43 #include "libavutil/sha.h"
44 #include "libavutil/timecode.h"
45 #include "libavcodec/ac3tab.h"
46 #include "avformat.h"
47 #include "internal.h"
48 #include "avio_internal.h"
49 #include "riff.h"
50 #include "isom.h"
51 #include "libavcodec/get_bits.h"
52 #include "id3v1.h"
53 #include "mov_chan.h"
54 #include "replaygain.h"
55 
56 #if CONFIG_ZLIB
57 #include <zlib.h>
58 #endif
59 
60 #include "qtpalette.h"
61 
62 /* those functions parse an atom */
63 /* links atom IDs to parse functions */
64 typedef struct MOVParseTableEntry {
65  uint32_t type;
66  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
68 
69 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
70 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
71 
73  unsigned len, const char *key)
74 {
75  char buf[16];
76 
77  short current, total = 0;
78  avio_rb16(pb); // unknown
79  current = avio_rb16(pb);
80  if (len >= 6)
81  total = avio_rb16(pb);
82  if (!total)
83  snprintf(buf, sizeof(buf), "%d", current);
84  else
85  snprintf(buf, sizeof(buf), "%d/%d", current, total);
87  av_dict_set(&c->fc->metadata, key, buf, 0);
88 
89  return 0;
90 }
91 
93  unsigned len, const char *key)
94 {
95  /* bypass padding bytes */
96  avio_r8(pb);
97  avio_r8(pb);
98  avio_r8(pb);
99 
101  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
102 
103  return 0;
104 }
105 
107  unsigned len, const char *key)
108 {
110  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
111 
112  return 0;
113 }
114 
116  unsigned len, const char *key)
117 {
118  short genre;
119 
120  avio_r8(pb); // unknown
121 
122  genre = avio_r8(pb);
123  if (genre < 1 || genre > ID3v1_GENRE_MAX)
124  return 0;
126  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
127 
128  return 0;
129 }
130 
131 static const uint32_t mac_to_unicode[128] = {
132  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
133  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
134  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
135  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
136  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
137  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
138  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
139  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
140  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
141  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
142  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
143  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
144  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
145  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
146  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
147  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
148 };
149 
151  char *dst, int dstlen)
152 {
153  char *p = dst;
154  char *end = dst+dstlen-1;
155  int i;
156 
157  for (i = 0; i < len; i++) {
158  uint8_t t, c = avio_r8(pb);
159  if (c < 0x80 && p < end)
160  *p++ = c;
161  else if (p < end)
162  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
163  }
164  *p = 0;
165  return p - dst;
166 }
167 
168 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
169 {
170  AVPacket pkt;
171  AVStream *st;
172  MOVStreamContext *sc;
173  enum AVCodecID id;
174  int ret;
175 
176  switch (type) {
177  case 0xd: id = AV_CODEC_ID_MJPEG; break;
178  case 0xe: id = AV_CODEC_ID_PNG; break;
179  case 0x1b: id = AV_CODEC_ID_BMP; break;
180  default:
181  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
182  avio_skip(pb, len);
183  return 0;
184  }
185 
186  st = avformat_new_stream(c->fc, NULL);
187  if (!st)
188  return AVERROR(ENOMEM);
189  sc = av_mallocz(sizeof(*sc));
190  if (!sc)
191  return AVERROR(ENOMEM);
192  st->priv_data = sc;
193 
194  ret = av_get_packet(pb, &pkt, len);
195  if (ret < 0)
196  return ret;
197 
198  if (pkt.size >= 8 && id != AV_CODEC_ID_BMP) {
199  if (AV_RB64(pkt.data) == 0x89504e470d0a1a0a) {
200  id = AV_CODEC_ID_PNG;
201  } else {
202  id = AV_CODEC_ID_MJPEG;
203  }
204  }
205 
207 
208  st->attached_pic = pkt;
209  st->attached_pic.stream_index = st->index;
211 
213  st->codecpar->codec_id = id;
214 
215  return 0;
216 }
217 
218 // 3GPP TS 26.244
219 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
220 {
221  char language[4] = { 0 };
222  char buf[200], place[100];
223  uint16_t langcode = 0;
224  double longitude, latitude, altitude;
225  const char *key = "location";
226 
227  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
228  av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
229  return AVERROR_INVALIDDATA;
230  }
231 
232  avio_skip(pb, 4); // version+flags
233  langcode = avio_rb16(pb);
234  ff_mov_lang_to_iso639(langcode, language);
235  len -= 6;
236 
237  len -= avio_get_str(pb, len, place, sizeof(place));
238  if (len < 1) {
239  av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
240  return AVERROR_INVALIDDATA;
241  }
242  avio_skip(pb, 1); // role
243  len -= 1;
244 
245  if (len < 12) {
246  av_log(c->fc, AV_LOG_ERROR,
247  "loci too short (%u bytes left, need at least %d)\n", len, 12);
248  return AVERROR_INVALIDDATA;
249  }
250  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
251  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
252  altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
253 
254  // Try to output in the same format as the ?xyz field
255  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
256  if (altitude)
257  av_strlcatf(buf, sizeof(buf), "%+f", altitude);
258  av_strlcatf(buf, sizeof(buf), "/%s", place);
259 
260  if (*language && strcmp(language, "und")) {
261  char key2[16];
262  snprintf(key2, sizeof(key2), "%s-%s", key, language);
263  av_dict_set(&c->fc->metadata, key2, buf, 0);
264  }
266  return av_dict_set(&c->fc->metadata, key, buf, 0);
267 }
268 
270 {
271  char tmp_key[5];
272  char key2[32], language[4] = {0};
273  char *str = NULL;
274  const char *key = NULL;
275  uint16_t langcode = 0;
276  uint32_t data_type = 0, str_size, str_size_alloc;
277  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
278  int raw = 0;
279  int num = 0;
280 
281  switch (atom.type) {
282  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
283  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
284  case MKTAG( 'X','M','P','_'):
285  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
286  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
287  case MKTAG( 'a','k','I','D'): key = "account_type";
289  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
290  case MKTAG( 'c','a','t','g'): key = "category"; break;
291  case MKTAG( 'c','p','i','l'): key = "compilation";
293  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
294  case MKTAG( 'd','e','s','c'): key = "description"; break;
295  case MKTAG( 'd','i','s','k'): key = "disc";
297  case MKTAG( 'e','g','i','d'): key = "episode_uid";
299  case MKTAG( 'g','n','r','e'): key = "genre";
300  parse = mov_metadata_gnre; break;
301  case MKTAG( 'h','d','v','d'): key = "hd_video";
303  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
304  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
305  case MKTAG( 'l','o','c','i'):
306  return mov_metadata_loci(c, pb, atom.size);
307  case MKTAG( 'p','c','s','t'): key = "podcast";
309  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
311  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
312  case MKTAG( 'r','t','n','g'): key = "rating";
314  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
315  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
316  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
317  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
318  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
319  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
320  case MKTAG( 's','t','i','k'): key = "media_type";
322  case MKTAG( 't','r','k','n'): key = "track";
324  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
325  case MKTAG( 't','v','e','s'): key = "episode_sort";
327  case MKTAG( 't','v','n','n'): key = "network"; break;
328  case MKTAG( 't','v','s','h'): key = "show"; break;
329  case MKTAG( 't','v','s','n'): key = "season_number";
331  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
332  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
333  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
334  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
335  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
336  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
337  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
338  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
339  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
340  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
341  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
342  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
343  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
344  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
345  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
346  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
347  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
348  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
349  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
350  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
351  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
352  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
353  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
354  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
355  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
356  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
357  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
358  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
359  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
360  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
361  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
362  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
363  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
364  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
365  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
366  }
367 retry:
368  if (c->itunes_metadata && atom.size > 8) {
369  int data_size = avio_rb32(pb);
370  int tag = avio_rl32(pb);
371  if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
372  data_type = avio_rb32(pb); // type
373  avio_rb32(pb); // unknown
374  str_size = data_size - 16;
375  atom.size -= 16;
376 
377  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
378  int ret = mov_read_covr(c, pb, data_type, str_size);
379  if (ret < 0) {
380  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
381  }
382  return ret;
383  } else if (!key && c->found_hdlr_mdta && c->meta_keys) {
384  uint32_t index = AV_RB32(&atom.type);
385  if (index < c->meta_keys_count) {
386  key = c->meta_keys[index];
387  } else {
389  "The index of 'data' is out of range: %d >= %d.\n",
390  index, c->meta_keys_count);
391  }
392  }
393  } else return 0;
394  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
395  str_size = avio_rb16(pb); // string length
396  if (str_size > atom.size) {
397  raw = 1;
398  avio_seek(pb, -2, SEEK_CUR);
399  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
400  goto retry;
401  }
402  langcode = avio_rb16(pb);
403  ff_mov_lang_to_iso639(langcode, language);
404  atom.size -= 4;
405  } else
406  str_size = atom.size;
407 
408  if (c->export_all && !key) {
409  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
410  key = tmp_key;
411  }
412 
413  if (!key)
414  return 0;
415  if (atom.size < 0 || str_size >= INT_MAX/2)
416  return AVERROR_INVALIDDATA;
417 
418  // Allocates enough space if data_type is a int32 or float32 number, otherwise
419  // worst-case requirement for output string in case of utf8 coded input
420  num = (data_type >= 21 && data_type <= 23);
421  str_size_alloc = (num ? 512 : (raw ? str_size : str_size * 2)) + 1;
422  str = av_mallocz(str_size_alloc);
423  if (!str)
424  return AVERROR(ENOMEM);
425 
426  if (parse)
427  parse(c, pb, str_size, key);
428  else {
429  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
430  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
431  } else if (data_type == 21) { // BE signed integer, variable size
432  int val = 0;
433  if (str_size == 1)
434  val = (int8_t)avio_r8(pb);
435  else if (str_size == 2)
436  val = (int16_t)avio_rb16(pb);
437  else if (str_size == 3)
438  val = ((int32_t)(avio_rb24(pb)<<8))>>8;
439  else if (str_size == 4)
440  val = (int32_t)avio_rb32(pb);
441  if (snprintf(str, str_size_alloc, "%d", val) >= str_size_alloc) {
442  av_log(c->fc, AV_LOG_ERROR,
443  "Failed to store the number (%d) in string.\n", val);
444  av_free(str);
445  return AVERROR_INVALIDDATA;
446  }
447  } else if (data_type == 22) { // BE unsigned integer, variable size
448  unsigned int val = 0;
449  if (str_size == 1)
450  val = avio_r8(pb);
451  else if (str_size == 2)
452  val = avio_rb16(pb);
453  else if (str_size == 3)
454  val = avio_rb24(pb);
455  else if (str_size == 4)
456  val = avio_rb32(pb);
457  if (snprintf(str, str_size_alloc, "%u", val) >= str_size_alloc) {
458  av_log(c->fc, AV_LOG_ERROR,
459  "Failed to store the number (%u) in string.\n", val);
460  av_free(str);
461  return AVERROR_INVALIDDATA;
462  }
463  } else if (data_type == 23 && str_size >= 4) { // BE float32
464  float val = av_int2float(avio_rb32(pb));
465  if (snprintf(str, str_size_alloc, "%f", val) >= str_size_alloc) {
466  av_log(c->fc, AV_LOG_ERROR,
467  "Failed to store the float32 number (%f) in string.\n", val);
468  av_free(str);
469  return AVERROR_INVALIDDATA;
470  }
471  } else {
472  int ret = ffio_read_size(pb, str, str_size);
473  if (ret < 0) {
474  av_free(str);
475  return ret;
476  }
477  str[str_size] = 0;
478  }
480  av_dict_set(&c->fc->metadata, key, str, 0);
481  if (*language && strcmp(language, "und")) {
482  snprintf(key2, sizeof(key2), "%s-%s", key, language);
483  av_dict_set(&c->fc->metadata, key2, str, 0);
484  }
485  if (!strcmp(key, "encoder")) {
486  int major, minor, micro;
487  if (sscanf(str, "HandBrake %d.%d.%d", &major, &minor, &micro) == 3) {
488  c->handbrake_version = 1000000*major + 1000*minor + micro;
489  }
490  }
491  }
492  av_log(c->fc, AV_LOG_TRACE, "lang \"%3s\" ", language);
493  av_log(c->fc, AV_LOG_TRACE, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
494  key, str, (char*)&atom.type, str_size_alloc, atom.size);
495 
496  av_freep(&str);
497  return 0;
498 }
499 
501 {
502  int64_t start;
503  int i, nb_chapters, str_len, version;
504  char str[256+1];
505  int ret;
506 
507  if (c->ignore_chapters)
508  return 0;
509 
510  if ((atom.size -= 5) < 0)
511  return 0;
512 
513  version = avio_r8(pb);
514  avio_rb24(pb);
515  if (version)
516  avio_rb32(pb); // ???
517  nb_chapters = avio_r8(pb);
518 
519  for (i = 0; i < nb_chapters; i++) {
520  if (atom.size < 9)
521  return 0;
522 
523  start = avio_rb64(pb);
524  str_len = avio_r8(pb);
525 
526  if ((atom.size -= 9+str_len) < 0)
527  return 0;
528 
529  ret = ffio_read_size(pb, str, str_len);
530  if (ret < 0)
531  return ret;
532  str[str_len] = 0;
533  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
534  }
535  return 0;
536 }
537 
538 #define MIN_DATA_ENTRY_BOX_SIZE 12
540 {
541  AVStream *st;
542  MOVStreamContext *sc;
543  int entries, i, j;
544 
545  if (c->fc->nb_streams < 1)
546  return 0;
547  st = c->fc->streams[c->fc->nb_streams-1];
548  sc = st->priv_data;
549 
550  avio_rb32(pb); // version + flags
551  entries = avio_rb32(pb);
552  if (!entries ||
553  entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
554  entries >= UINT_MAX / sizeof(*sc->drefs))
555  return AVERROR_INVALIDDATA;
556  sc->drefs_count = 0;
557  av_free(sc->drefs);
558  sc->drefs_count = 0;
559  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
560  if (!sc->drefs)
561  return AVERROR(ENOMEM);
562  sc->drefs_count = entries;
563 
564  for (i = 0; i < entries; i++) {
565  MOVDref *dref = &sc->drefs[i];
566  uint32_t size = avio_rb32(pb);
567  int64_t next = avio_tell(pb) + size - 4;
568 
569  if (size < 12)
570  return AVERROR_INVALIDDATA;
571 
572  dref->type = avio_rl32(pb);
573  avio_rb32(pb); // version + flags
574  av_log(c->fc, AV_LOG_TRACE, "type %.4s size %d\n", (char*)&dref->type, size);
575 
576  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
577  /* macintosh alias record */
578  uint16_t volume_len, len;
579  int16_t type;
580  int ret;
581 
582  avio_skip(pb, 10);
583 
584  volume_len = avio_r8(pb);
585  volume_len = FFMIN(volume_len, 27);
586  ret = ffio_read_size(pb, dref->volume, 27);
587  if (ret < 0)
588  return ret;
589  dref->volume[volume_len] = 0;
590  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
591 
592  avio_skip(pb, 12);
593 
594  len = avio_r8(pb);
595  len = FFMIN(len, 63);
596  ret = ffio_read_size(pb, dref->filename, 63);
597  if (ret < 0)
598  return ret;
599  dref->filename[len] = 0;
600  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
601 
602  avio_skip(pb, 16);
603 
604  /* read next level up_from_alias/down_to_target */
605  dref->nlvl_from = avio_rb16(pb);
606  dref->nlvl_to = avio_rb16(pb);
607  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
608  dref->nlvl_from, dref->nlvl_to);
609 
610  avio_skip(pb, 16);
611 
612  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
613  if(avio_feof(pb))
614  return AVERROR_EOF;
615  type = avio_rb16(pb);
616  len = avio_rb16(pb);
617  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
618  if (len&1)
619  len += 1;
620  if (type == 2) { // absolute path
621  av_free(dref->path);
622  dref->path = av_mallocz(len+1);
623  if (!dref->path)
624  return AVERROR(ENOMEM);
625 
626  ret = ffio_read_size(pb, dref->path, len);
627  if (ret < 0) {
628  av_freep(&dref->path);
629  return ret;
630  }
631  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
632  len -= volume_len;
633  memmove(dref->path, dref->path+volume_len, len);
634  dref->path[len] = 0;
635  }
636  // trim string of any ending zeros
637  for (j = len - 1; j >= 0; j--) {
638  if (dref->path[j] == 0)
639  len--;
640  else
641  break;
642  }
643  for (j = 0; j < len; j++)
644  if (dref->path[j] == ':' || dref->path[j] == 0)
645  dref->path[j] = '/';
646  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
647  } else if (type == 0) { // directory name
648  av_free(dref->dir);
649  dref->dir = av_malloc(len+1);
650  if (!dref->dir)
651  return AVERROR(ENOMEM);
652 
653  ret = ffio_read_size(pb, dref->dir, len);
654  if (ret < 0) {
655  av_freep(&dref->dir);
656  return ret;
657  }
658  dref->dir[len] = 0;
659  for (j = 0; j < len; j++)
660  if (dref->dir[j] == ':')
661  dref->dir[j] = '/';
662  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
663  } else
664  avio_skip(pb, len);
665  }
666  } else {
667  av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x08%x size %d\n",
668  dref->type, size);
669  entries--;
670  i--;
671  }
672  avio_seek(pb, next, SEEK_SET);
673  }
674  return 0;
675 }
676 
678 {
679  AVStream *st;
680  uint32_t type;
681  uint32_t av_unused ctype;
682  int64_t title_size;
683  char *title_str;
684  int ret;
685 
686  avio_r8(pb); /* version */
687  avio_rb24(pb); /* flags */
688 
689  /* component type */
690  ctype = avio_rl32(pb);
691  type = avio_rl32(pb); /* component subtype */
692 
693  av_log(c->fc, AV_LOG_TRACE, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
694  av_log(c->fc, AV_LOG_TRACE, "stype= %.4s\n", (char*)&type);
695 
696  if (c->trak_index < 0) { // meta not inside a trak
697  if (type == MKTAG('m','d','t','a')) {
698  c->found_hdlr_mdta = 1;
699  }
700  return 0;
701  }
702 
703  st = c->fc->streams[c->fc->nb_streams-1];
704 
705  if (type == MKTAG('v','i','d','e'))
707  else if (type == MKTAG('s','o','u','n'))
709  else if (type == MKTAG('m','1','a',' '))
711  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
713 
714  avio_rb32(pb); /* component manufacture */
715  avio_rb32(pb); /* component flags */
716  avio_rb32(pb); /* component flags mask */
717 
718  title_size = atom.size - 24;
719  if (title_size > 0) {
720  title_str = av_malloc(title_size + 1); /* Add null terminator */
721  if (!title_str)
722  return AVERROR(ENOMEM);
723 
724  ret = ffio_read_size(pb, title_str, title_size);
725  if (ret < 0) {
726  av_freep(&title_str);
727  return ret;
728  }
729  title_str[title_size] = 0;
730  if (title_str[0]) {
731  int off = (!c->isom && title_str[0] == title_size - 1);
732  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
733  }
734  av_freep(&title_str);
735  }
736 
737  return 0;
738 }
739 
741 {
742  AVStream *st;
743  int tag;
744 
745  if (fc->nb_streams < 1)
746  return 0;
747  st = fc->streams[fc->nb_streams-1];
748 
749  avio_rb32(pb); /* version + flags */
750  ff_mp4_read_descr(fc, pb, &tag);
751  if (tag == MP4ESDescrTag) {
753  } else
754  avio_rb16(pb); /* ID */
755 
756  ff_mp4_read_descr(fc, pb, &tag);
757  if (tag == MP4DecConfigDescrTag)
758  ff_mp4_read_dec_config_descr(fc, st, pb);
759  return 0;
760 }
761 
763 {
764  return ff_mov_read_esds(c->fc, pb);
765 }
766 
768 {
769  AVStream *st;
770  enum AVAudioServiceType *ast;
771  int ac3info, acmod, lfeon, bsmod;
772 
773  if (c->fc->nb_streams < 1)
774  return 0;
775  st = c->fc->streams[c->fc->nb_streams-1];
776 
778  sizeof(*ast));
779  if (!ast)
780  return AVERROR(ENOMEM);
781 
782  ac3info = avio_rb24(pb);
783  bsmod = (ac3info >> 14) & 0x7;
784  acmod = (ac3info >> 11) & 0x7;
785  lfeon = (ac3info >> 10) & 0x1;
786  st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
788  if (lfeon)
790  *ast = bsmod;
791  if (st->codecpar->channels > 1 && bsmod == 0x7)
793 
794 #if FF_API_LAVF_AVCTX
796  st->codec->audio_service_type = *ast;
798 #endif
799 
800  return 0;
801 }
802 
804 {
805  AVStream *st;
806  enum AVAudioServiceType *ast;
807  int eac3info, acmod, lfeon, bsmod;
808 
809  if (c->fc->nb_streams < 1)
810  return 0;
811  st = c->fc->streams[c->fc->nb_streams-1];
812 
814  sizeof(*ast));
815  if (!ast)
816  return AVERROR(ENOMEM);
817 
818  /* No need to parse fields for additional independent substreams and its
819  * associated dependent substreams since libavcodec's E-AC-3 decoder
820  * does not support them yet. */
821  avio_rb16(pb); /* data_rate and num_ind_sub */
822  eac3info = avio_rb24(pb);
823  bsmod = (eac3info >> 12) & 0x1f;
824  acmod = (eac3info >> 9) & 0x7;
825  lfeon = (eac3info >> 8) & 0x1;
827  if (lfeon)
830  *ast = bsmod;
831  if (st->codecpar->channels > 1 && bsmod == 0x7)
833 
834 #if FF_API_LAVF_AVCTX
836  st->codec->audio_service_type = *ast;
838 #endif
839 
840  return 0;
841 }
842 
844 {
845  const uint32_t ddts_size = 20;
846  AVStream *st = NULL;
847  uint8_t *buf = NULL;
848  uint32_t frame_duration_code = 0;
849  uint32_t channel_layout_code = 0;
850  GetBitContext gb;
851 
852  buf = av_malloc(ddts_size + FF_INPUT_BUFFER_PADDING_SIZE);
853  if (!buf) {
854  return AVERROR(ENOMEM);
855  }
856  if (avio_read(pb, buf, ddts_size) < ddts_size) {
857  av_free(buf);
858  return AVERROR_INVALIDDATA;
859  }
860 
861  init_get_bits(&gb, buf, 8*ddts_size);
862 
863  if (c->fc->nb_streams < 1) {
864  return 0;
865  }
866  st = c->fc->streams[c->fc->nb_streams-1];
867 
868  st->codecpar->sample_rate = get_bits_long(&gb, 32);
869  skip_bits_long(&gb, 32); /* max bitrate */
870  st->codecpar->bit_rate = get_bits_long(&gb, 32);
871  st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
872  frame_duration_code = get_bits(&gb, 2);
873  skip_bits(&gb, 30); /* various fields */
874  channel_layout_code = get_bits(&gb, 16);
875 
876  st->codecpar->frame_size =
877  (frame_duration_code == 0) ? 512 :
878  (frame_duration_code == 1) ? 1024 :
879  (frame_duration_code == 2) ? 2048 :
880  (frame_duration_code == 3) ? 4096 : 0;
881 
882  if (channel_layout_code > 0xff) {
883  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
884  }
885  st->codecpar->channel_layout =
886  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
887  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
888  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
889  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
890  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
891  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
892 
894 
895  return 0;
896 }
897 
899 {
900  AVStream *st;
901 
902  if (c->fc->nb_streams < 1)
903  return 0;
904  st = c->fc->streams[c->fc->nb_streams-1];
905 
906  if (atom.size < 16)
907  return 0;
908 
909  /* skip version and flags */
910  avio_skip(pb, 4);
911 
912  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
913 
914  return 0;
915 }
916 
918 {
919  AVStream *st;
920  int ret;
921 
922  if (c->fc->nb_streams < 1)
923  return 0;
924  st = c->fc->streams[c->fc->nb_streams-1];
925 
926  if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
927  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
928 
929  return ret;
930 }
931 
933 {
934  const int num = avio_rb32(pb);
935  const int den = avio_rb32(pb);
936  AVStream *st;
937 
938  if (c->fc->nb_streams < 1)
939  return 0;
940  st = c->fc->streams[c->fc->nb_streams-1];
941 
942  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
943  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
945  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
947  num, den);
948  } else if (den != 0) {
950  num, den, 32767);
951  }
952  return 0;
953 }
954 
955 /* this atom contains actual media data */
957 {
958  if (atom.size == 0) /* wrong one (MP4) */
959  return 0;
960  c->found_mdat=1;
961  return 0; /* now go for moov */
962 }
963 
964 #define DRM_BLOB_SIZE 56
965 
967 {
968  uint8_t intermediate_key[20];
969  uint8_t intermediate_iv[20];
970  uint8_t input[64];
971  uint8_t output[64];
972  uint8_t file_checksum[20];
973  uint8_t calculated_checksum[20];
974  struct AVSHA *sha;
975  int i;
976  int ret = 0;
977  uint8_t *activation_bytes = c->activation_bytes;
978  uint8_t *fixed_key = c->audible_fixed_key;
979 
980  c->aax_mode = 1;
981 
982  sha = av_sha_alloc();
983  if (!sha)
984  return AVERROR(ENOMEM);
985  c->aes_decrypt = av_aes_alloc();
986  if (!c->aes_decrypt) {
987  ret = AVERROR(ENOMEM);
988  goto fail;
989  }
990 
991  /* drm blob processing */
992  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
993  avio_read(pb, input, DRM_BLOB_SIZE);
994  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
995  avio_read(pb, file_checksum, 20);
996 
997  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
998  for (i = 0; i < 20; i++)
999  av_log(sha, AV_LOG_INFO, "%02x", file_checksum[i]);
1000  av_log(c->fc, AV_LOG_INFO, "\n");
1001 
1002  /* verify activation data */
1003  if (!activation_bytes) {
1004  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
1005  ret = 0; /* allow ffprobe to continue working on .aax files */
1006  goto fail;
1007  }
1008  if (c->activation_bytes_size != 4) {
1009  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
1010  ret = AVERROR(EINVAL);
1011  goto fail;
1012  }
1013 
1014  /* verify fixed key */
1015  if (c->audible_fixed_key_size != 16) {
1016  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
1017  ret = AVERROR(EINVAL);
1018  goto fail;
1019  }
1020 
1021  /* AAX (and AAX+) key derivation */
1022  av_sha_init(sha, 160);
1023  av_sha_update(sha, fixed_key, 16);
1024  av_sha_update(sha, activation_bytes, 4);
1025  av_sha_final(sha, intermediate_key);
1026  av_sha_init(sha, 160);
1027  av_sha_update(sha, fixed_key, 16);
1028  av_sha_update(sha, intermediate_key, 20);
1029  av_sha_update(sha, activation_bytes, 4);
1030  av_sha_final(sha, intermediate_iv);
1031  av_sha_init(sha, 160);
1032  av_sha_update(sha, intermediate_key, 16);
1033  av_sha_update(sha, intermediate_iv, 16);
1034  av_sha_final(sha, calculated_checksum);
1035  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1036  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1037  ret = AVERROR_INVALIDDATA;
1038  goto fail;
1039  }
1040  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1041  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1042  for (i = 0; i < 4; i++) {
1043  // file data (in output) is stored in big-endian mode
1044  if (activation_bytes[i] != output[3 - i]) { // critical error
1045  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1046  ret = AVERROR_INVALIDDATA;
1047  goto fail;
1048  }
1049  }
1050  memcpy(c->file_key, output + 8, 16);
1051  memcpy(input, output + 26, 16);
1052  av_sha_init(sha, 160);
1053  av_sha_update(sha, input, 16);
1054  av_sha_update(sha, c->file_key, 16);
1055  av_sha_update(sha, fixed_key, 16);
1056  av_sha_final(sha, c->file_iv);
1057 
1058 fail:
1059  av_free(sha);
1060 
1061  return ret;
1062 }
1063 
1064 // Audible AAX (and AAX+) bytestream decryption
1065 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1066 {
1067  int blocks = 0;
1068  unsigned char iv[16];
1069 
1070  memcpy(iv, c->file_iv, 16); // iv is overwritten
1071  blocks = size >> 4; // trailing bytes are not encrypted!
1072  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1073  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1074 
1075  return 0;
1076 }
1077 
1078 /* read major brand, minor version and compatible brands and store them as metadata */
1080 {
1081  uint32_t minor_ver;
1082  int comp_brand_size;
1083  char* comp_brands_str;
1084  uint8_t type[5] = {0};
1085  int ret = ffio_read_size(pb, type, 4);
1086  if (ret < 0)
1087  return ret;
1088 
1089  if (strcmp(type, "qt "))
1090  c->isom = 1;
1091  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1092  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1093  minor_ver = avio_rb32(pb); /* minor version */
1094  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1095 
1096  comp_brand_size = atom.size - 8;
1097  if (comp_brand_size < 0)
1098  return AVERROR_INVALIDDATA;
1099  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1100  if (!comp_brands_str)
1101  return AVERROR(ENOMEM);
1102 
1103  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1104  if (ret < 0) {
1105  av_freep(&comp_brands_str);
1106  return ret;
1107  }
1108  comp_brands_str[comp_brand_size] = 0;
1109  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1110  av_freep(&comp_brands_str);
1111 
1112  return 0;
1113 }
1114 
1115 /* this atom should contain all header atoms */
1117 {
1118  int ret;
1119 
1120  if (c->found_moov) {
1121  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1122  avio_skip(pb, atom.size);
1123  return 0;
1124  }
1125 
1126  if ((ret = mov_read_default(c, pb, atom)) < 0)
1127  return ret;
1128  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1129  /* so we don't parse the whole file if over a network */
1130  c->found_moov=1;
1131  return 0; /* now go for mdat */
1132 }
1133 
1135 {
1136  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1137  c->has_looked_for_mfra = 1;
1138  if (pb->seekable) {
1139  int ret;
1140  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1141  "for a mfra\n");
1142  if ((ret = mov_read_mfra(c, pb)) < 0) {
1143  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1144  "read the mfra (may be a live ismv)\n");
1145  }
1146  } else {
1147  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1148  "seekable, can not look for mfra\n");
1149  }
1150  }
1152  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1153  return mov_read_default(c, pb, atom);
1154 }
1155 
1156 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1157 {
1158  char buffer[32];
1159  if (time) {
1160  struct tm *ptm, tmbuf;
1161  time_t timet;
1162  if(time >= 2082844800)
1163  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1164  timet = time;
1165  ptm = gmtime_r(&timet, &tmbuf);
1166  if (!ptm) return;
1167  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1168  av_dict_set(metadata, "creation_time", buffer, 0);
1169  }
1170 }
1171 
1173 {
1174  AVStream *st;
1175  MOVStreamContext *sc;
1176  int version;
1177  char language[4] = {0};
1178  unsigned lang;
1179  int64_t creation_time;
1180 
1181  if (c->fc->nb_streams < 1)
1182  return 0;
1183  st = c->fc->streams[c->fc->nb_streams-1];
1184  sc = st->priv_data;
1185 
1186  if (sc->time_scale) {
1187  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1188  return AVERROR_INVALIDDATA;
1189  }
1190 
1191  version = avio_r8(pb);
1192  if (version > 1) {
1193  avpriv_request_sample(c->fc, "Version %d", version);
1194  return AVERROR_PATCHWELCOME;
1195  }
1196  avio_rb24(pb); /* flags */
1197  if (version == 1) {
1198  creation_time = avio_rb64(pb);
1199  avio_rb64(pb);
1200  } else {
1201  creation_time = avio_rb32(pb);
1202  avio_rb32(pb); /* modification time */
1203  }
1204  mov_metadata_creation_time(&st->metadata, creation_time);
1205 
1206  sc->time_scale = avio_rb32(pb);
1207  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1208 
1209  lang = avio_rb16(pb); /* language */
1210  if (ff_mov_lang_to_iso639(lang, language))
1211  av_dict_set(&st->metadata, "language", language, 0);
1212  avio_rb16(pb); /* quality */
1213 
1214  return 0;
1215 }
1216 
1218 {
1219  int64_t creation_time;
1220  int version = avio_r8(pb); /* version */
1221  avio_rb24(pb); /* flags */
1222 
1223  if (version == 1) {
1224  creation_time = avio_rb64(pb);
1225  avio_rb64(pb);
1226  } else {
1227  creation_time = avio_rb32(pb);
1228  avio_rb32(pb); /* modification time */
1229  }
1230  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1231  c->time_scale = avio_rb32(pb); /* time scale */
1232 
1233  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1234 
1235  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1236  // set the AVCodecContext duration because the duration of individual tracks
1237  // may be inaccurate
1238  if (c->time_scale > 0 && !c->trex_data)
1240  avio_rb32(pb); /* preferred scale */
1241 
1242  avio_rb16(pb); /* preferred volume */
1243 
1244  avio_skip(pb, 10); /* reserved */
1245 
1246  avio_skip(pb, 36); /* display matrix */
1247 
1248  avio_rb32(pb); /* preview time */
1249  avio_rb32(pb); /* preview duration */
1250  avio_rb32(pb); /* poster time */
1251  avio_rb32(pb); /* selection time */
1252  avio_rb32(pb); /* selection duration */
1253  avio_rb32(pb); /* current time */
1254  avio_rb32(pb); /* next track ID */
1255 
1256  return 0;
1257 }
1258 
1260 {
1261  AVStream *st;
1262  int little_endian;
1263 
1264  if (c->fc->nb_streams < 1)
1265  return 0;
1266  st = c->fc->streams[c->fc->nb_streams-1];
1267 
1268  little_endian = avio_rb16(pb) & 0xFF;
1269  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1270  if (little_endian == 1) {
1271  switch (st->codecpar->codec_id) {
1272  case AV_CODEC_ID_PCM_S24BE:
1274  break;
1275  case AV_CODEC_ID_PCM_S32BE:
1277  break;
1278  case AV_CODEC_ID_PCM_F32BE:
1280  break;
1281  case AV_CODEC_ID_PCM_F64BE:
1283  break;
1284  default:
1285  break;
1286  }
1287  }
1288  return 0;
1289 }
1290 
1292 {
1293  AVStream *st;
1294  char color_parameter_type[5] = { 0 };
1295  uint16_t color_primaries, color_trc, color_matrix;
1296  int ret;
1297 
1298  if (c->fc->nb_streams < 1)
1299  return 0;
1300  st = c->fc->streams[c->fc->nb_streams - 1];
1301 
1302  ret = ffio_read_size(pb, color_parameter_type, 4);
1303  if (ret < 0)
1304  return ret;
1305  if (strncmp(color_parameter_type, "nclx", 4) &&
1306  strncmp(color_parameter_type, "nclc", 4)) {
1307  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1308  color_parameter_type);
1309  return 0;
1310  }
1311 
1312  color_primaries = avio_rb16(pb);
1313  color_trc = avio_rb16(pb);
1314  color_matrix = avio_rb16(pb);
1315 
1316  av_log(c->fc, AV_LOG_TRACE,
1317  "%s: pri %d trc %d matrix %d",
1318  color_parameter_type, color_primaries, color_trc, color_matrix);
1319 
1320  if (!strncmp(color_parameter_type, "nclx", 4)) {
1321  uint8_t color_range = avio_r8(pb) >> 7;
1322  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1323  if (color_range)
1325  else
1327  /* 14496-12 references JPEG XR specs (rather than the more complete
1328  * 23001-8) so some adjusting is required */
1329  if (color_primaries >= AVCOL_PRI_FILM)
1330  color_primaries = AVCOL_PRI_UNSPECIFIED;
1331  if ((color_trc >= AVCOL_TRC_LINEAR &&
1332  color_trc <= AVCOL_TRC_LOG_SQRT) ||
1333  color_trc >= AVCOL_TRC_BT2020_10)
1334  color_trc = AVCOL_TRC_UNSPECIFIED;
1335  if (color_matrix >= AVCOL_SPC_BT2020_NCL)
1336  color_matrix = AVCOL_SPC_UNSPECIFIED;
1338  st->codecpar->color_trc = color_trc;
1339  st->codecpar->color_space = color_matrix;
1340  } else if (!strncmp(color_parameter_type, "nclc", 4)) {
1341  /* color primaries, Table 4-4 */
1342  switch (color_primaries) {
1343  case 1: st->codecpar->color_primaries = AVCOL_PRI_BT709; break;
1344  case 5: st->codecpar->color_primaries = AVCOL_PRI_SMPTE170M; break;
1345  case 6: st->codecpar->color_primaries = AVCOL_PRI_SMPTE240M; break;
1346  }
1347  /* color transfer, Table 4-5 */
1348  switch (color_trc) {
1349  case 1: st->codecpar->color_trc = AVCOL_TRC_BT709; break;
1350  case 7: st->codecpar->color_trc = AVCOL_TRC_SMPTE240M; break;
1351  }
1352  /* color matrix, Table 4-6 */
1353  switch (color_matrix) {
1354  case 1: st->codecpar->color_space = AVCOL_SPC_BT709; break;
1355  case 6: st->codecpar->color_space = AVCOL_SPC_BT470BG; break;
1356  case 7: st->codecpar->color_space = AVCOL_SPC_SMPTE240M; break;
1357  }
1358  }
1359  av_log(c->fc, AV_LOG_TRACE, "\n");
1360 
1361  return 0;
1362 }
1363 
1365 {
1366  AVStream *st;
1367  unsigned mov_field_order;
1368  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1369 
1370  if (c->fc->nb_streams < 1) // will happen with jp2 files
1371  return 0;
1372  st = c->fc->streams[c->fc->nb_streams-1];
1373  if (atom.size < 2)
1374  return AVERROR_INVALIDDATA;
1375  mov_field_order = avio_rb16(pb);
1376  if ((mov_field_order & 0xFF00) == 0x0100)
1377  decoded_field_order = AV_FIELD_PROGRESSIVE;
1378  else if ((mov_field_order & 0xFF00) == 0x0200) {
1379  switch (mov_field_order & 0xFF) {
1380  case 0x01: decoded_field_order = AV_FIELD_TT;
1381  break;
1382  case 0x06: decoded_field_order = AV_FIELD_BB;
1383  break;
1384  case 0x09: decoded_field_order = AV_FIELD_TB;
1385  break;
1386  case 0x0E: decoded_field_order = AV_FIELD_BT;
1387  break;
1388  }
1389  }
1390  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1391  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1392  }
1393  st->codecpar->field_order = decoded_field_order;
1394 
1395  return 0;
1396 }
1397 
1399 {
1400  int err = 0;
1401  uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1402  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1403  return AVERROR_INVALIDDATA;
1404  if ((err = av_reallocp(&par->extradata, size)) < 0) {
1405  par->extradata_size = 0;
1406  return err;
1407  }
1409  return 0;
1410 }
1411 
1412 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1414  AVCodecParameters *par, uint8_t *buf)
1415 {
1416  int64_t result = atom.size;
1417  int err;
1418 
1419  AV_WB32(buf , atom.size + 8);
1420  AV_WL32(buf + 4, atom.type);
1421  err = ffio_read_size(pb, buf + 8, atom.size);
1422  if (err < 0) {
1423  par->extradata_size -= atom.size;
1424  return err;
1425  } else if (err < atom.size) {
1426  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1427  par->extradata_size -= atom.size - err;
1428  result = err;
1429  }
1430  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1431  return result;
1432 }
1433 
1434 /* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1436  enum AVCodecID codec_id)
1437 {
1438  AVStream *st;
1439  uint64_t original_size;
1440  int err;
1441 
1442  if (c->fc->nb_streams < 1) // will happen with jp2 files
1443  return 0;
1444  st = c->fc->streams[c->fc->nb_streams-1];
1445 
1446  if (st->codecpar->codec_id != codec_id)
1447  return 0; /* unexpected codec_id - don't mess with extradata */
1448 
1449  original_size = st->codecpar->extradata_size;
1450  err = mov_realloc_extradata(st->codecpar, atom);
1451  if (err)
1452  return err;
1453 
1454  err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1455  if (err < 0)
1456  return err;
1457  return 0; // Note: this is the original behavior to ignore truncation.
1458 }
1459 
1460 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1462 {
1463  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1464 }
1465 
1467 {
1468  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1469 }
1470 
1472 {
1473  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1474 }
1475 
1477 {
1478  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1479 }
1480 
1482 {
1483  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1484  if(ret == 0)
1485  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1486  return ret;
1487 }
1488 
1490 {
1491  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1492 
1493  if (!ret && c->fc->nb_streams >= 1) {
1494  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1495  if (par->extradata_size >= 40) {
1496  par->height = AV_RB16(&par->extradata[36]);
1497  par->width = AV_RB16(&par->extradata[38]);
1498  }
1499  }
1500  return ret;
1501 }
1502 
1504 {
1505  if (c->fc->nb_streams >= 1) {
1506  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1507  if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1508  par->codec_id == AV_CODEC_ID_H264 &&
1509  atom.size > 11) {
1510  int cid;
1511  avio_skip(pb, 10);
1512  cid = avio_rb16(pb);
1513  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1514  if (cid == 0xd4d || cid == 0xd4e)
1515  par->width = 1440;
1516  return 0;
1517  } else if (par->codec_tag == MKTAG('A', 'V', 'd', '1') &&
1518  atom.size >= 24) {
1519  int num, den;
1520  avio_skip(pb, 12);
1521  num = avio_rb32(pb);
1522  den = avio_rb32(pb);
1523  if (num <= 0 || den <= 0)
1524  return 0;
1525  switch (avio_rb32(pb)) {
1526  case 2:
1527  if (den >= INT_MAX / 2)
1528  return 0;
1529  den *= 2;
1530  case 1:
1531  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1532  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1533  default:
1534  return 0;
1535  }
1536  }
1537  }
1538 
1539  return mov_read_avid(c, pb, atom);
1540 }
1541 
1543 {
1544  int ret = 0;
1545  int length = 0;
1546  uint64_t original_size;
1547  if (c->fc->nb_streams >= 1) {
1548  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1549  if (par->codec_id == AV_CODEC_ID_H264)
1550  return 0;
1551  if (atom.size == 16) {
1552  original_size = par->extradata_size;
1553  ret = mov_realloc_extradata(par, atom);
1554  if (!ret) {
1555  length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1556  if (length == atom.size) {
1557  const uint8_t range_value = par->extradata[original_size + 19];
1558  switch (range_value) {
1559  case 1:
1561  break;
1562  case 2:
1564  break;
1565  default:
1566  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1567  break;
1568  }
1569  ff_dlog(c, "color_range: %d\n", par->color_range);
1570  } else {
1571  /* For some reason the whole atom was not added to the extradata */
1572  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1573  }
1574  } else {
1575  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1576  }
1577  } else {
1578  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1579  }
1580  }
1581 
1582  return ret;
1583 }
1584 
1586 {
1587  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1588 }
1589 
1591 {
1592  AVStream *st;
1593  int ret;
1594 
1595  if (c->fc->nb_streams < 1)
1596  return 0;
1597  st = c->fc->streams[c->fc->nb_streams-1];
1598 
1599  if ((uint64_t)atom.size > (1<<30))
1600  return AVERROR_INVALIDDATA;
1601 
1602  if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1605  // pass all frma atom to codec, needed at least for QDMC and QDM2
1606  av_freep(&st->codecpar->extradata);
1607  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1608  if (ret < 0)
1609  return ret;
1610  } else if (atom.size > 8) { /* to read frma, esds atoms */
1611  if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1612  uint64_t buffer;
1613  ret = ffio_ensure_seekback(pb, 8);
1614  if (ret < 0)
1615  return ret;
1616  buffer = avio_rb64(pb);
1617  atom.size -= 8;
1618  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1619  && buffer >> 32 <= atom.size
1620  && buffer >> 32 >= 8) {
1621  avio_skip(pb, -8);
1622  atom.size += 8;
1623  } else if (!st->codecpar->extradata_size) {
1624 #define ALAC_EXTRADATA_SIZE 36
1626  if (!st->codecpar->extradata)
1627  return AVERROR(ENOMEM);
1630  AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1631  AV_WB64(st->codecpar->extradata + 12, buffer);
1632  avio_read(pb, st->codecpar->extradata + 20, 16);
1633  avio_skip(pb, atom.size - 24);
1634  return 0;
1635  }
1636  }
1637  if ((ret = mov_read_default(c, pb, atom)) < 0)
1638  return ret;
1639  } else
1640  avio_skip(pb, atom.size);
1641  return 0;
1642 }
1643 
1644 /**
1645  * This function reads atom content and puts data in extradata without tag
1646  * nor size unlike mov_read_extradata.
1647  */
1649 {
1650  AVStream *st;
1651  int ret;
1652 
1653  if (c->fc->nb_streams < 1)
1654  return 0;
1655  st = c->fc->streams[c->fc->nb_streams-1];
1656 
1657  if ((uint64_t)atom.size > (1<<30))
1658  return AVERROR_INVALIDDATA;
1659 
1660  if (atom.size >= 10) {
1661  // Broken files created by legacy versions of libavformat will
1662  // wrap a whole fiel atom inside of a glbl atom.
1663  unsigned size = avio_rb32(pb);
1664  unsigned type = avio_rl32(pb);
1665  avio_seek(pb, -8, SEEK_CUR);
1666  if (type == MKTAG('f','i','e','l') && size == atom.size)
1667  return mov_read_default(c, pb, atom);
1668  }
1669  if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1670  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1671  return 0;
1672  }
1673  av_freep(&st->codecpar->extradata);
1674  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1675  if (ret < 0)
1676  return ret;
1677 
1678  return 0;
1679 }
1680 
1682 {
1683  AVStream *st;
1684  uint8_t profile_level;
1685  int ret;
1686 
1687  if (c->fc->nb_streams < 1)
1688  return 0;
1689  st = c->fc->streams[c->fc->nb_streams-1];
1690 
1691  if (atom.size >= (1<<28) || atom.size < 7)
1692  return AVERROR_INVALIDDATA;
1693 
1694  profile_level = avio_r8(pb);
1695  if ((profile_level & 0xf0) != 0xc0)
1696  return 0;
1697 
1698  avio_seek(pb, 6, SEEK_CUR);
1699  av_freep(&st->codecpar->extradata);
1700  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1701  if (ret < 0)
1702  return ret;
1703 
1704  return 0;
1705 }
1706 
1707 /**
1708  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1709  * but can have extradata appended at the end after the 40 bytes belonging
1710  * to the struct.
1711  */
1713 {
1714  AVStream *st;
1715  int ret;
1716 
1717  if (c->fc->nb_streams < 1)
1718  return 0;
1719  if (atom.size <= 40)
1720  return 0;
1721  st = c->fc->streams[c->fc->nb_streams-1];
1722 
1723  if ((uint64_t)atom.size > (1<<30))
1724  return AVERROR_INVALIDDATA;
1725 
1726  avio_skip(pb, 40);
1727  av_freep(&st->codecpar->extradata);
1728  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1729  if (ret < 0)
1730  return ret;
1731 
1732  return 0;
1733 }
1734 
1736 {
1737  AVStream *st;
1738  MOVStreamContext *sc;
1739  unsigned int i, entries;
1740 
1741  if (c->fc->nb_streams < 1)
1742  return 0;
1743  st = c->fc->streams[c->fc->nb_streams-1];
1744  sc = st->priv_data;
1745 
1746  avio_r8(pb); /* version */
1747  avio_rb24(pb); /* flags */
1748 
1749  entries = avio_rb32(pb);
1750 
1751  if (!entries)
1752  return 0;
1753 
1754  if (sc->chunk_offsets)
1755  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1756  av_free(sc->chunk_offsets);
1757  sc->chunk_count = 0;
1758  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1759  if (!sc->chunk_offsets)
1760  return AVERROR(ENOMEM);
1761  sc->chunk_count = entries;
1762 
1763  if (atom.type == MKTAG('s','t','c','o'))
1764  for (i = 0; i < entries && !pb->eof_reached; i++)
1765  sc->chunk_offsets[i] = avio_rb32(pb);
1766  else if (atom.type == MKTAG('c','o','6','4'))
1767  for (i = 0; i < entries && !pb->eof_reached; i++)
1768  sc->chunk_offsets[i] = avio_rb64(pb);
1769  else
1770  return AVERROR_INVALIDDATA;
1771 
1772  sc->chunk_count = i;
1773 
1774  if (pb->eof_reached)
1775  return AVERROR_EOF;
1776 
1777  return 0;
1778 }
1779 
1780 /**
1781  * Compute codec id for 'lpcm' tag.
1782  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1783  */
1785 {
1786  /* lpcm flags:
1787  * 0x1 = float
1788  * 0x2 = big-endian
1789  * 0x4 = signed
1790  */
1791  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1792 }
1793 
1794 static int mov_codec_id(AVStream *st, uint32_t format)
1795 {
1796  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1797 
1798  if (id <= 0 &&
1799  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1800  (format & 0xFFFF) == 'T' + ('S' << 8)))
1801  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1802 
1803  if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1805  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1806  /* skip old ASF MPEG-4 tag */
1807  format && format != MKTAG('m','p','4','s')) {
1809  if (id <= 0)
1810  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1811  if (id > 0)
1813  else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
1815  st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
1817  if (id > 0)
1819  }
1820  }
1821 
1822  st->codecpar->codec_tag = format;
1823 
1824  return id;
1825 }
1826 
1828  AVStream *st, MOVStreamContext *sc)
1829 {
1830  uint8_t codec_name[32];
1831  int64_t stsd_start;
1832  unsigned int len;
1833 
1834  /* The first 16 bytes of the video sample description are already
1835  * read in ff_mov_read_stsd_entries() */
1836  stsd_start = avio_tell(pb) - 16;
1837 
1838  avio_rb16(pb); /* version */
1839  avio_rb16(pb); /* revision level */
1840  avio_rb32(pb); /* vendor */
1841  avio_rb32(pb); /* temporal quality */
1842  avio_rb32(pb); /* spatial quality */
1843 
1844  st->codecpar->width = avio_rb16(pb); /* width */
1845  st->codecpar->height = avio_rb16(pb); /* height */
1846 
1847  avio_rb32(pb); /* horiz resolution */
1848  avio_rb32(pb); /* vert resolution */
1849  avio_rb32(pb); /* data size, always 0 */
1850  avio_rb16(pb); /* frames per samples */
1851 
1852  len = avio_r8(pb); /* codec name, pascal string */
1853  if (len > 31)
1854  len = 31;
1855  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1856  if (len < 31)
1857  avio_skip(pb, 31 - len);
1858 
1859  if (codec_name[0])
1860  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1861 
1862  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1863  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1864  st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1865  st->codecpar->width &= ~1;
1866  st->codecpar->height &= ~1;
1867  }
1868  /* Flash Media Server uses tag H.263 with Sorenson Spark */
1869  if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1870  !memcmp(codec_name, "Sorenson H263", 13))
1872 
1873  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1874 
1875  avio_seek(pb, stsd_start, SEEK_SET);
1876 
1877  if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
1878  st->codecpar->bits_per_coded_sample &= 0x1F;
1879  sc->has_palette = 1;
1880  }
1881 }
1882 
1884  AVStream *st, MOVStreamContext *sc)
1885 {
1886  int bits_per_sample, flags;
1887  uint16_t version = avio_rb16(pb);
1888  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1889 
1890  avio_rb16(pb); /* revision level */
1891  avio_rb32(pb); /* vendor */
1892 
1893  st->codecpar->channels = avio_rb16(pb); /* channel count */
1894  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1895  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1896 
1897  sc->audio_cid = avio_rb16(pb);
1898  avio_rb16(pb); /* packet size = 0 */
1899 
1900  st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1901 
1902  // Read QT version 1 fields. In version 0 these do not exist.
1903  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1904  if (!c->isom ||
1905  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1906 
1907  if (version == 1) {
1908  sc->samples_per_frame = avio_rb32(pb);
1909  avio_rb32(pb); /* bytes per packet */
1910  sc->bytes_per_frame = avio_rb32(pb);
1911  avio_rb32(pb); /* bytes per sample */
1912  } else if (version == 2) {
1913  avio_rb32(pb); /* sizeof struct only */
1915  st->codecpar->channels = avio_rb32(pb);
1916  avio_rb32(pb); /* always 0x7F000000 */
1918 
1919  flags = avio_rb32(pb); /* lpcm format specific flag */
1920  sc->bytes_per_frame = avio_rb32(pb);
1921  sc->samples_per_frame = avio_rb32(pb);
1922  if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1923  st->codecpar->codec_id =
1925  flags);
1926  }
1927  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1928  /* can't correctly handle variable sized packet as audio unit */
1929  switch (st->codecpar->codec_id) {
1930  case AV_CODEC_ID_MP2:
1931  case AV_CODEC_ID_MP3:
1933  break;
1934  }
1935  }
1936  }
1937 
1938  if (sc->format == 0) {
1939  if (st->codecpar->bits_per_coded_sample == 8)
1940  st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1941  else if (st->codecpar->bits_per_coded_sample == 16)
1942  st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1943  }
1944 
1945  switch (st->codecpar->codec_id) {
1946  case AV_CODEC_ID_PCM_S8:
1947  case AV_CODEC_ID_PCM_U8:
1948  if (st->codecpar->bits_per_coded_sample == 16)
1950  break;
1951  case AV_CODEC_ID_PCM_S16LE:
1952  case AV_CODEC_ID_PCM_S16BE:
1953  if (st->codecpar->bits_per_coded_sample == 8)
1955  else if (st->codecpar->bits_per_coded_sample == 24)
1956  st->codecpar->codec_id =
1959  else if (st->codecpar->bits_per_coded_sample == 32)
1960  st->codecpar->codec_id =
1963  break;
1964  /* set values for old format before stsd version 1 appeared */
1965  case AV_CODEC_ID_MACE3:
1966  sc->samples_per_frame = 6;
1967  sc->bytes_per_frame = 2 * st->codecpar->channels;
1968  break;
1969  case AV_CODEC_ID_MACE6:
1970  sc->samples_per_frame = 6;
1971  sc->bytes_per_frame = 1 * st->codecpar->channels;
1972  break;
1974  sc->samples_per_frame = 64;
1975  sc->bytes_per_frame = 34 * st->codecpar->channels;
1976  break;
1977  case AV_CODEC_ID_GSM:
1978  sc->samples_per_frame = 160;
1979  sc->bytes_per_frame = 33;
1980  break;
1981  default:
1982  break;
1983  }
1984 
1985  bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
1986  if (bits_per_sample) {
1987  st->codecpar->bits_per_coded_sample = bits_per_sample;
1988  sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
1989  }
1990 }
1991 
1993  AVStream *st, MOVStreamContext *sc,
1994  int64_t size)
1995 {
1996  // ttxt stsd contains display flags, justification, background
1997  // color, fonts, and default styles, so fake an atom to read it
1998  MOVAtom fake_atom = { .size = size };
1999  // mp4s contains a regular esds atom
2000  if (st->codecpar->codec_tag != AV_RL32("mp4s"))
2001  mov_read_glbl(c, pb, fake_atom);
2002  st->codecpar->width = sc->width;
2003  st->codecpar->height = sc->height;
2004 }
2005 
2006 static uint32_t yuv_to_rgba(uint32_t ycbcr)
2007 {
2008  uint8_t r, g, b;
2009  int y, cb, cr;
2010 
2011  y = (ycbcr >> 16) & 0xFF;
2012  cr = (ycbcr >> 8) & 0xFF;
2013  cb = ycbcr & 0xFF;
2014 
2015  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
2016  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
2017  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
2018 
2019  return (r << 16) | (g << 8) | b;
2020 }
2021 
2023 {
2024  char buf[256] = {0};
2025  uint8_t *src = st->codecpar->extradata;
2026  int i;
2027 
2028  if (st->codecpar->extradata_size != 64)
2029  return 0;
2030 
2031  if (st->codecpar->width > 0 && st->codecpar->height > 0)
2032  snprintf(buf, sizeof(buf), "size: %dx%d\n",
2033  st->codecpar->width, st->codecpar->height);
2034  av_strlcat(buf, "palette: ", sizeof(buf));
2035 
2036  for (i = 0; i < 16; i++) {
2037  uint32_t yuv = AV_RB32(src + i * 4);
2038  uint32_t rgba = yuv_to_rgba(yuv);
2039 
2040  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2041  }
2042 
2043  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2044  return 0;
2045 
2046  av_freep(&st->codecpar->extradata);
2047  st->codecpar->extradata_size = 0;
2049  if (!st->codecpar->extradata)
2050  return AVERROR(ENOMEM);
2051  st->codecpar->extradata_size = strlen(buf);
2052  memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2053 
2054  return 0;
2055 }
2056 
2058  AVStream *st, MOVStreamContext *sc,
2059  int64_t size)
2060 {
2061  int ret;
2062 
2063  if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2064  if ((int)size != size)
2065  return AVERROR(ENOMEM);
2066 
2067  ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2068  if (ret < 0)
2069  return ret;
2070  if (size > 16) {
2071  MOVStreamContext *tmcd_ctx = st->priv_data;
2072  int val;
2073  val = AV_RB32(st->codecpar->extradata + 4);
2074  tmcd_ctx->tmcd_flags = val;
2075  st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2076  st->avg_frame_rate.den = 1;
2077 #if FF_API_LAVF_AVCTX
2079  st->codec->time_base = av_inv_q(st->avg_frame_rate);
2081 #endif
2082  /* adjust for per frame dur in counter mode */
2083  if (tmcd_ctx->tmcd_flags & 0x0008) {
2084  int timescale = AV_RB32(st->codecpar->extradata + 8);
2085  int framedur = AV_RB32(st->codecpar->extradata + 12);
2086  st->avg_frame_rate.num *= timescale;
2087  st->avg_frame_rate.den *= framedur;
2088 #if FF_API_LAVF_AVCTX
2090  st->codec->time_base.den *= timescale;
2091  st->codec->time_base.num *= framedur;
2093 #endif
2094  }
2095  if (size > 30) {
2096  uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2097  uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2098  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2099  uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2100  if (str_size > 0 && size >= (int)str_size + 26) {
2101  char *reel_name = av_malloc(str_size + 1);
2102  if (!reel_name)
2103  return AVERROR(ENOMEM);
2104  memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2105  reel_name[str_size] = 0; /* Add null terminator */
2106  /* don't add reel_name if emtpy string */
2107  if (*reel_name == 0) {
2108  av_free(reel_name);
2109  } else {
2110  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2111  }
2112  }
2113  }
2114  }
2115  }
2116  } else {
2117  /* other codec type, just skip (rtp, mp4s ...) */
2118  avio_skip(pb, size);
2119  }
2120  return 0;
2121 }
2122 
2124  AVStream *st, MOVStreamContext *sc)
2125 {
2126  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2127  !st->codecpar->sample_rate && sc->time_scale > 1)
2128  st->codecpar->sample_rate = sc->time_scale;
2129 
2130  /* special codec parameters handling */
2131  switch (st->codecpar->codec_id) {
2132 #if CONFIG_DV_DEMUXER
2133  case AV_CODEC_ID_DVAUDIO:
2135  if (!c->dv_fctx) {
2136  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2137  return AVERROR(ENOMEM);
2138  }
2140  if (!c->dv_demux) {
2141  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2142  return AVERROR(ENOMEM);
2143  }
2144  sc->dv_audio_container = 1;
2146  break;
2147 #endif
2148  /* no ifdef since parameters are always those */
2149  case AV_CODEC_ID_QCELP:
2150  st->codecpar->channels = 1;
2151  // force sample rate for qcelp when not stored in mov
2152  if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2153  st->codecpar->sample_rate = 8000;
2154  // FIXME: Why is the following needed for some files?
2155  sc->samples_per_frame = 160;
2156  if (!sc->bytes_per_frame)
2157  sc->bytes_per_frame = 35;
2158  break;
2159  case AV_CODEC_ID_AMR_NB:
2160  st->codecpar->channels = 1;
2161  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2162  st->codecpar->sample_rate = 8000;
2163  break;
2164  case AV_CODEC_ID_AMR_WB:
2165  st->codecpar->channels = 1;
2166  st->codecpar->sample_rate = 16000;
2167  break;
2168  case AV_CODEC_ID_MP2:
2169  case AV_CODEC_ID_MP3:
2170  /* force type after stsd for m1a hdlr */
2172  break;
2173  case AV_CODEC_ID_GSM:
2174  case AV_CODEC_ID_ADPCM_MS:
2176  case AV_CODEC_ID_ILBC:
2177  case AV_CODEC_ID_MACE3:
2178  case AV_CODEC_ID_MACE6:
2179  case AV_CODEC_ID_QDM2:
2181  break;
2182  case AV_CODEC_ID_ALAC:
2183  if (st->codecpar->extradata_size == 36) {
2184  st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2185  st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2186  }
2187  break;
2188  case AV_CODEC_ID_AC3:
2189  case AV_CODEC_ID_EAC3:
2191  case AV_CODEC_ID_VC1:
2193  break;
2194  default:
2195  break;
2196  }
2197  return 0;
2198 }
2199 
2201  int codec_tag, int format,
2202  int64_t size)
2203 {
2204  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2205 
2206  if (codec_tag &&
2207  (codec_tag != format &&
2208  // prores is allowed to have differing data format and codec tag
2209  codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
2210  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2211  : codec_tag != MKTAG('j','p','e','g')))) {
2212  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2213  * export it as a separate AVStream but this needs a few changes
2214  * in the MOV demuxer, patch welcome. */
2215 
2216  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2217  avio_skip(pb, size);
2218  return 1;
2219  }
2220  if ( codec_tag == AV_RL32("hvc1") ||
2221  codec_tag == AV_RL32("hev1")
2222  )
2223  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
2224 
2225  return 0;
2226 }
2227 
2229 {
2230  AVStream *st;
2231  MOVStreamContext *sc;
2232  int pseudo_stream_id;
2233 
2234  if (c->fc->nb_streams < 1)
2235  return 0;
2236  st = c->fc->streams[c->fc->nb_streams-1];
2237  sc = st->priv_data;
2238 
2239  for (pseudo_stream_id = 0;
2240  pseudo_stream_id < entries && !pb->eof_reached;
2241  pseudo_stream_id++) {
2242  //Parsing Sample description table
2243  enum AVCodecID id;
2244  int ret, dref_id = 1;
2245  MOVAtom a = { AV_RL32("stsd") };
2246  int64_t start_pos = avio_tell(pb);
2247  int64_t size = avio_rb32(pb); /* size */
2248  uint32_t format = avio_rl32(pb); /* data format */
2249 
2250  if (size >= 16) {
2251  avio_rb32(pb); /* reserved */
2252  avio_rb16(pb); /* reserved */
2253  dref_id = avio_rb16(pb);
2254  } else if (size <= 7) {
2255  av_log(c->fc, AV_LOG_ERROR,
2256  "invalid size %"PRId64" in stsd\n", size);
2257  return AVERROR_INVALIDDATA;
2258  }
2259 
2260  if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2261  size - (avio_tell(pb) - start_pos)))
2262  continue;
2263 
2264  sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2265  sc->dref_id= dref_id;
2266  sc->format = format;
2267 
2268  id = mov_codec_id(st, format);
2269 
2270  av_log(c->fc, AV_LOG_TRACE,
2271  "size=%"PRId64" 4CC= %c%c%c%c/0x%08x codec_type=%d\n", size,
2272  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
2273  (format >> 24) & 0xff, format, st->codecpar->codec_type);
2274 
2276  st->codecpar->codec_id = id;
2277  mov_parse_stsd_video(c, pb, st, sc);
2278  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2279  st->codecpar->codec_id = id;
2280  mov_parse_stsd_audio(c, pb, st, sc);
2281  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2282  st->codecpar->codec_id = id;
2283  mov_parse_stsd_subtitle(c, pb, st, sc,
2284  size - (avio_tell(pb) - start_pos));
2285  } else {
2286  ret = mov_parse_stsd_data(c, pb, st, sc,
2287  size - (avio_tell(pb) - start_pos));
2288  if (ret < 0)
2289  return ret;
2290  }
2291  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2292  a.size = size - (avio_tell(pb) - start_pos);
2293  if (a.size > 8) {
2294  if ((ret = mov_read_default(c, pb, a)) < 0)
2295  return ret;
2296  } else if (a.size > 0)
2297  avio_skip(pb, a.size);
2298 
2299  if (sc->extradata) {
2300  int extra_size = st->codecpar->extradata_size;
2301 
2302  /* Move the current stream extradata to the stream context one. */
2303  sc->extradata_size[pseudo_stream_id] = extra_size;
2304  sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
2305  if (!sc->extradata[pseudo_stream_id])
2306  return AVERROR(ENOMEM);
2307  memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
2308  av_freep(&st->codecpar->extradata);
2309  st->codecpar->extradata_size = 0;
2310  }
2311  }
2312 
2313  if (pb->eof_reached)
2314  return AVERROR_EOF;
2315 
2316  return mov_finalize_stsd_codec(c, pb, st, sc);
2317 }
2318 
2320 {
2321  AVStream *st;
2322  MOVStreamContext *sc;
2323  int ret;
2324 
2325  if (c->fc->nb_streams < 1)
2326  return 0;
2327  st = c->fc->streams[c->fc->nb_streams - 1];
2328  sc = st->priv_data;
2329 
2330  avio_r8(pb); /* version */
2331  avio_rb24(pb); /* flags */
2332  sc->stsd_count = avio_rb32(pb); /* entries */
2333 
2334  /* Prepare space for hosting multiple extradata. */
2335  sc->extradata = av_mallocz_array(sc->stsd_count, sizeof(*sc->extradata));
2336  if (!sc->extradata)
2337  return AVERROR(ENOMEM);
2338 
2339  sc->extradata_size = av_mallocz_array(sc->stsd_count, sizeof(*sc->extradata_size));
2340  if (!sc->extradata_size)
2341  return AVERROR(ENOMEM);
2342 
2343  ret = ff_mov_read_stsd_entries(c, pb, sc->stsd_count);
2344  if (ret < 0)
2345  return ret;
2346 
2347  /* Restore back the primary extradata. */
2348  av_free(st->codecpar->extradata);
2349  st->codecpar->extradata_size = sc->extradata_size[0];
2351  if (!st->codecpar->extradata)
2352  return AVERROR(ENOMEM);
2353  memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
2354 
2355  return 0;
2356 }
2357 
2359 {
2360  AVStream *st;
2361  MOVStreamContext *sc;
2362  unsigned int i, entries;
2363 
2364  if (c->fc->nb_streams < 1)
2365  return 0;
2366  st = c->fc->streams[c->fc->nb_streams-1];
2367  sc = st->priv_data;
2368 
2369  avio_r8(pb); /* version */
2370  avio_rb24(pb); /* flags */
2371 
2372  entries = avio_rb32(pb);
2373 
2374  av_log(c->fc, AV_LOG_TRACE, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
2375 
2376  if (!entries)
2377  return 0;
2378  if (sc->stsc_data)
2379  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2380  av_free(sc->stsc_data);
2381  sc->stsc_count = 0;
2382  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2383  if (!sc->stsc_data)
2384  return AVERROR(ENOMEM);
2385 
2386  for (i = 0; i < entries && !pb->eof_reached; i++) {
2387  sc->stsc_data[i].first = avio_rb32(pb);
2388  sc->stsc_data[i].count = avio_rb32(pb);
2389  sc->stsc_data[i].id = avio_rb32(pb);
2390  }
2391 
2392  sc->stsc_count = i;
2393 
2394  if (pb->eof_reached)
2395  return AVERROR_EOF;
2396 
2397  return 0;
2398 }
2399 
2400 /* Compute the samples value for the stsc entry at the given index. */
2401 static inline int mov_get_stsc_samples(MOVStreamContext *sc, int index)
2402 {
2403  int chunk_count;
2404 
2405  if (index < sc->stsc_count - 1)
2406  chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2407  else
2408  chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2409 
2410  return sc->stsc_data[index].count * chunk_count;
2411 }
2412 
2414 {
2415  AVStream *st;
2416  MOVStreamContext *sc;
2417  unsigned i, entries;
2418 
2419  if (c->fc->nb_streams < 1)
2420  return 0;
2421  st = c->fc->streams[c->fc->nb_streams-1];
2422  sc = st->priv_data;
2423 
2424  avio_rb32(pb); // version + flags
2425 
2426  entries = avio_rb32(pb);
2427  if (sc->stps_data)
2428  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2429  av_free(sc->stps_data);
2430  sc->stps_count = 0;
2431  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2432  if (!sc->stps_data)
2433  return AVERROR(ENOMEM);
2434 
2435  for (i = 0; i < entries && !pb->eof_reached; i++) {
2436  sc->stps_data[i] = avio_rb32(pb);
2437  //av_log(c->fc, AV_LOG_TRACE, "stps %d\n", sc->stps_data[i]);
2438  }
2439 
2440  sc->stps_count = i;
2441 
2442  if (pb->eof_reached)
2443  return AVERROR_EOF;
2444 
2445  return 0;
2446 }
2447 
2449 {
2450  AVStream *st;
2451  MOVStreamContext *sc;
2452  unsigned int i, entries;
2453 
2454  if (c->fc->nb_streams < 1)
2455  return 0;
2456  st = c->fc->streams[c->fc->nb_streams-1];
2457  sc = st->priv_data;
2458 
2459  avio_r8(pb); /* version */
2460  avio_rb24(pb); /* flags */
2461 
2462  entries = avio_rb32(pb);
2463 
2464  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %d\n", entries);
2465 
2466  if (!entries)
2467  {
2468  sc->keyframe_absent = 1;
2469  if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2471  return 0;
2472  }
2473  if (sc->keyframes)
2474  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2475  if (entries >= UINT_MAX / sizeof(int))
2476  return AVERROR_INVALIDDATA;
2477  av_freep(&sc->keyframes);
2478  sc->keyframe_count = 0;
2479  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2480  if (!sc->keyframes)
2481  return AVERROR(ENOMEM);
2482 
2483  for (i = 0; i < entries && !pb->eof_reached; i++) {
2484  sc->keyframes[i] = avio_rb32(pb);
2485  //av_log(c->fc, AV_LOG_TRACE, "keyframes[]=%d\n", sc->keyframes[i]);
2486  }
2487 
2488  sc->keyframe_count = i;
2489 
2490  if (pb->eof_reached)
2491  return AVERROR_EOF;
2492 
2493  return 0;
2494 }
2495 
2497 {
2498  AVStream *st;
2499  MOVStreamContext *sc;
2500  unsigned int i, entries, sample_size, field_size, num_bytes;
2501  GetBitContext gb;
2502  unsigned char* buf;
2503  int ret;
2504 
2505  if (c->fc->nb_streams < 1)
2506  return 0;
2507  st = c->fc->streams[c->fc->nb_streams-1];
2508  sc = st->priv_data;
2509 
2510  avio_r8(pb); /* version */
2511  avio_rb24(pb); /* flags */
2512 
2513  if (atom.type == MKTAG('s','t','s','z')) {
2514  sample_size = avio_rb32(pb);
2515  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2516  sc->sample_size = sample_size;
2517  sc->stsz_sample_size = sample_size;
2518  field_size = 32;
2519  } else {
2520  sample_size = 0;
2521  avio_rb24(pb); /* reserved */
2522  field_size = avio_r8(pb);
2523  }
2524  entries = avio_rb32(pb);
2525 
2526  av_log(c->fc, AV_LOG_TRACE, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2527 
2528  sc->sample_count = entries;
2529  if (sample_size)
2530  return 0;
2531 
2532  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2533  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2534  return AVERROR_INVALIDDATA;
2535  }
2536 
2537  if (!entries)
2538  return 0;
2539  if (entries >= (UINT_MAX - 4) / field_size)
2540  return AVERROR_INVALIDDATA;
2541  if (sc->sample_sizes)
2542  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2543  av_free(sc->sample_sizes);
2544  sc->sample_count = 0;
2545  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2546  if (!sc->sample_sizes)
2547  return AVERROR(ENOMEM);
2548 
2549  num_bytes = (entries*field_size+4)>>3;
2550 
2551  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2552  if (!buf) {
2553  av_freep(&sc->sample_sizes);
2554  return AVERROR(ENOMEM);
2555  }
2556 
2557  ret = ffio_read_size(pb, buf, num_bytes);
2558  if (ret < 0) {
2559  av_freep(&sc->sample_sizes);
2560  av_free(buf);
2561  return ret;
2562  }
2563 
2564  init_get_bits(&gb, buf, 8*num_bytes);
2565 
2566  for (i = 0; i < entries && !pb->eof_reached; i++) {
2567  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2568  sc->data_size += sc->sample_sizes[i];
2569  }
2570 
2571  sc->sample_count = i;
2572 
2573  av_free(buf);
2574 
2575  if (pb->eof_reached)
2576  return AVERROR_EOF;
2577 
2578  return 0;
2579 }
2580 
2582 {
2583  AVStream *st;
2584  MOVStreamContext *sc;
2585  unsigned int i, entries;
2586  int64_t duration=0;
2587  int64_t total_sample_count=0;
2588 
2589  if (c->fc->nb_streams < 1)
2590  return 0;
2591  st = c->fc->streams[c->fc->nb_streams-1];
2592  sc = st->priv_data;
2593 
2594  avio_r8(pb); /* version */
2595  avio_rb24(pb); /* flags */
2596  entries = avio_rb32(pb);
2597 
2598  av_log(c->fc, AV_LOG_TRACE, "track[%i].stts.entries = %i\n",
2599  c->fc->nb_streams-1, entries);
2600 
2601  if (sc->stts_data)
2602  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2603  av_free(sc->stts_data);
2604  sc->stts_count = 0;
2605  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2606  if (!sc->stts_data)
2607  return AVERROR(ENOMEM);
2608 
2609  for (i = 0; i < entries && !pb->eof_reached; i++) {
2610  int sample_duration;
2611  int sample_count;
2612 
2613  sample_count=avio_rb32(pb);
2614  sample_duration = avio_rb32(pb);
2615 
2616  if (sample_count < 0) {
2617  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2618  return AVERROR_INVALIDDATA;
2619  }
2620  sc->stts_data[i].count= sample_count;
2621  sc->stts_data[i].duration= sample_duration;
2622 
2623  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2624  sample_count, sample_duration);
2625 
2626  if ( i+1 == entries
2627  && i
2628  && sample_count == 1
2629  && total_sample_count > 100
2630  && sample_duration/10 > duration / total_sample_count)
2631  sample_duration = duration / total_sample_count;
2632  duration+=(int64_t)sample_duration*sample_count;
2633  total_sample_count+=sample_count;
2634  }
2635 
2636  sc->stts_count = i;
2637 
2638  sc->duration_for_fps += duration;
2639  sc->nb_frames_for_fps += total_sample_count;
2640 
2641  if (pb->eof_reached)
2642  return AVERROR_EOF;
2643 
2644  st->nb_frames= total_sample_count;
2645  if (duration)
2646  st->duration= duration;
2647  sc->track_end = duration;
2648  return 0;
2649 }
2650 
2652 {
2653  if (duration < 0) {
2654  if (duration == INT_MIN) {
2655  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2656  duration++;
2657  }
2658  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2659  }
2660 }
2661 
2663 {
2664  AVStream *st;
2665  MOVStreamContext *sc;
2666  unsigned int i, entries, ctts_count = 0;
2667 
2668  if (c->fc->nb_streams < 1)
2669  return 0;
2670  st = c->fc->streams[c->fc->nb_streams-1];
2671  sc = st->priv_data;
2672 
2673  avio_r8(pb); /* version */
2674  avio_rb24(pb); /* flags */
2675  entries = avio_rb32(pb);
2676 
2677  av_log(c->fc, AV_LOG_TRACE, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2678 
2679  if (!entries)
2680  return 0;
2681  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2682  return AVERROR_INVALIDDATA;
2683  av_freep(&sc->ctts_data);
2684  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2685  if (!sc->ctts_data)
2686  return AVERROR(ENOMEM);
2687 
2688  for (i = 0; i < entries && !pb->eof_reached; i++) {
2689  int count =avio_rb32(pb);
2690  int duration =avio_rb32(pb);
2691 
2692  if (count <= 0) {
2693  av_log(c->fc, AV_LOG_TRACE,
2694  "ignoring CTTS entry with count=%d duration=%d\n",
2695  count, duration);
2696  continue;
2697  }
2698 
2699  sc->ctts_data[ctts_count].count = count;
2700  sc->ctts_data[ctts_count].duration = duration;
2701  ctts_count++;
2702 
2703  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2704  count, duration);
2705 
2706  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2707  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2708  av_freep(&sc->ctts_data);
2709  sc->ctts_count = 0;
2710  return 0;
2711  }
2712 
2713  if (i+2<entries)
2714  mov_update_dts_shift(sc, duration);
2715  }
2716 
2717  sc->ctts_count = ctts_count;
2718 
2719  if (pb->eof_reached)
2720  return AVERROR_EOF;
2721 
2722  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2723 
2724  return 0;
2725 }
2726 
2728 {
2729  AVStream *st;
2730  MOVStreamContext *sc;
2731  unsigned int i, entries;
2732  uint8_t version;
2733  uint32_t grouping_type;
2734 
2735  if (c->fc->nb_streams < 1)
2736  return 0;
2737  st = c->fc->streams[c->fc->nb_streams-1];
2738  sc = st->priv_data;
2739 
2740  version = avio_r8(pb); /* version */
2741  avio_rb24(pb); /* flags */
2742  grouping_type = avio_rl32(pb);
2743  if (grouping_type != MKTAG( 'r','a','p',' '))
2744  return 0; /* only support 'rap ' grouping */
2745  if (version == 1)
2746  avio_rb32(pb); /* grouping_type_parameter */
2747 
2748  entries = avio_rb32(pb);
2749  if (!entries)
2750  return 0;
2751  if (sc->rap_group)
2752  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2753  av_free(sc->rap_group);
2754  sc->rap_group_count = 0;
2755  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2756  if (!sc->rap_group)
2757  return AVERROR(ENOMEM);
2758 
2759  for (i = 0; i < entries && !pb->eof_reached; i++) {
2760  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2761  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2762  }
2763 
2764  sc->rap_group_count = i;
2765 
2766  return pb->eof_reached ? AVERROR_EOF : 0;
2767 }
2768 
2769 static void mov_build_index(MOVContext *mov, AVStream *st)
2770 {
2771  MOVStreamContext *sc = st->priv_data;
2772  int64_t current_offset;
2773  int64_t current_dts = 0;
2774  unsigned int stts_index = 0;
2775  unsigned int stsc_index = 0;
2776  unsigned int stss_index = 0;
2777  unsigned int stps_index = 0;
2778  unsigned int i, j;
2779  uint64_t stream_size = 0;
2780 
2781  if (sc->elst_count) {
2782  int i, edit_start_index = 0, unsupported = 0;
2783  int64_t empty_duration = 0; // empty duration of the first edit list entry
2784  int64_t start_time = 0; // start time of the media
2785 
2786  for (i = 0; i < sc->elst_count; i++) {
2787  const MOVElst *e = &sc->elst_data[i];
2788  if (i == 0 && e->time == -1) {
2789  /* if empty, the first entry is the start time of the stream
2790  * relative to the presentation itself */
2791  empty_duration = e->duration;
2792  edit_start_index = 1;
2793  } else if (i == edit_start_index && e->time >= 0) {
2794  start_time = e->time;
2795  } else
2796  unsupported = 1;
2797  }
2798  if (unsupported)
2799  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
2800  "a/v desync might occur, patch welcome\n");
2801 
2802  /* adjust first dts according to edit list */
2803  if ((empty_duration || start_time) && mov->time_scale > 0) {
2804  if (empty_duration)
2805  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
2806  sc->time_offset = start_time - empty_duration;
2807  current_dts = -sc->time_offset;
2808  if (sc->ctts_count>0 && sc->stts_count>0 &&
2809  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2810  /* more than 16 frames delay, dts are likely wrong
2811  this happens with files created by iMovie */
2812  sc->wrong_dts = 1;
2813  st->codecpar->video_delay = 1;
2814  }
2815  }
2816 
2817  if (!unsupported && st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
2818  sc->start_pad = start_time;
2819  }
2820 
2821  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2822  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2823  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2824  unsigned int current_sample = 0;
2825  unsigned int stts_sample = 0;
2826  unsigned int sample_size;
2827  unsigned int distance = 0;
2828  unsigned int rap_group_index = 0;
2829  unsigned int rap_group_sample = 0;
2830  int64_t last_dts = 0;
2831  int64_t dts_correction = 0;
2832  int rap_group_present = sc->rap_group_count && sc->rap_group;
2833  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2834 
2835  current_dts -= sc->dts_shift;
2836  last_dts = current_dts;
2837 
2838  if (!sc->sample_count || st->nb_index_entries)
2839  return;
2840  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2841  return;
2843  st->nb_index_entries + sc->sample_count,
2844  sizeof(*st->index_entries)) < 0) {
2845  st->nb_index_entries = 0;
2846  return;
2847  }
2849 
2850  for (i = 0; i < sc->chunk_count; i++) {
2851  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2852  current_offset = sc->chunk_offsets[i];
2853  while (stsc_index + 1 < sc->stsc_count &&
2854  i + 1 == sc->stsc_data[stsc_index + 1].first)
2855  stsc_index++;
2856 
2857  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2858  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2859  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2860  sc->stsz_sample_size = sc->sample_size;
2861  }
2862  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2863  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2864  sc->stsz_sample_size = sc->sample_size;
2865  }
2866 
2867  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2868  int keyframe = 0;
2869  if (current_sample >= sc->sample_count) {
2870  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2871  return;
2872  }
2873 
2874  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2875  keyframe = 1;
2876  if (stss_index + 1 < sc->keyframe_count)
2877  stss_index++;
2878  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2879  keyframe = 1;
2880  if (stps_index + 1 < sc->stps_count)
2881  stps_index++;
2882  }
2883  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2884  if (sc->rap_group[rap_group_index].index > 0)
2885  keyframe = 1;
2886  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2887  rap_group_sample = 0;
2888  rap_group_index++;
2889  }
2890  }
2891  if (sc->keyframe_absent
2892  && !sc->stps_count
2893  && !rap_group_present
2894  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2895  keyframe = 1;
2896  if (keyframe)
2897  distance = 0;
2898  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2899  if (sc->pseudo_stream_id == -1 ||
2900  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2901  AVIndexEntry *e;
2902  if (sample_size > 0x3FFFFFFF) {
2903  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
2904  return;
2905  }
2906  e = &st->index_entries[st->nb_index_entries++];
2907  e->pos = current_offset;
2908  e->timestamp = current_dts;
2909  e->size = sample_size;
2910  e->min_distance = distance;
2911  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2912  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2913  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2914  current_offset, current_dts, sample_size, distance, keyframe);
2915  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2916  ff_rfps_add_frame(mov->fc, st, current_dts);
2917  }
2918 
2919  current_offset += sample_size;
2920  stream_size += sample_size;
2921 
2922  /* A negative sample duration is invalid based on the spec,
2923  * but some samples need it to correct the DTS. */
2924  if (sc->stts_data[stts_index].duration < 0) {
2925  av_log(mov->fc, AV_LOG_WARNING,
2926  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
2927  sc->stts_data[stts_index].duration, stts_index,
2928  st->index);
2929  dts_correction += sc->stts_data[stts_index].duration - 1;
2930  sc->stts_data[stts_index].duration = 1;
2931  }
2932  current_dts += sc->stts_data[stts_index].duration;
2933  if (!dts_correction || current_dts + dts_correction > last_dts) {
2934  current_dts += dts_correction;
2935  dts_correction = 0;
2936  } else {
2937  /* Avoid creating non-monotonous DTS */
2938  dts_correction += current_dts - last_dts - 1;
2939  current_dts = last_dts + 1;
2940  }
2941  last_dts = current_dts;
2942  distance++;
2943  stts_sample++;
2944  current_sample++;
2945  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2946  stts_sample = 0;
2947  stts_index++;
2948  }
2949  }
2950  }
2951  if (st->duration > 0)
2952  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
2953  } else {
2954  unsigned chunk_samples, total = 0;
2955 
2956  // compute total chunk count
2957  for (i = 0; i < sc->stsc_count; i++) {
2958  unsigned count, chunk_count;
2959 
2960  chunk_samples = sc->stsc_data[i].count;
2961  if (i != sc->stsc_count - 1 &&
2962  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2963  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2964  return;
2965  }
2966 
2967  if (sc->samples_per_frame >= 160) { // gsm
2968  count = chunk_samples / sc->samples_per_frame;
2969  } else if (sc->samples_per_frame > 1) {
2970  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2971  count = (chunk_samples+samples-1) / samples;
2972  } else {
2973  count = (chunk_samples+1023) / 1024;
2974  }
2975 
2976  if (i < sc->stsc_count - 1)
2977  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2978  else
2979  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2980  total += chunk_count * count;
2981  }
2982 
2983  av_log(mov->fc, AV_LOG_TRACE, "chunk count %d\n", total);
2984  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2985  return;
2987  st->nb_index_entries + total,
2988  sizeof(*st->index_entries)) < 0) {
2989  st->nb_index_entries = 0;
2990  return;
2991  }
2992  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2993 
2994  // populate index
2995  for (i = 0; i < sc->chunk_count; i++) {
2996  current_offset = sc->chunk_offsets[i];
2997  if (stsc_index + 1 < sc->stsc_count &&
2998  i + 1 == sc->stsc_data[stsc_index + 1].first)
2999  stsc_index++;
3000  chunk_samples = sc->stsc_data[stsc_index].count;
3001 
3002  while (chunk_samples > 0) {
3003  AVIndexEntry *e;
3004  unsigned size, samples;
3005 
3006  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3008  "Zero bytes per frame, but %d samples per frame",
3009  sc->samples_per_frame);
3010  return;
3011  }
3012 
3013  if (sc->samples_per_frame >= 160) { // gsm
3014  samples = sc->samples_per_frame;
3015  size = sc->bytes_per_frame;
3016  } else {
3017  if (sc->samples_per_frame > 1) {
3018  samples = FFMIN((1024 / sc->samples_per_frame)*
3019  sc->samples_per_frame, chunk_samples);
3020  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3021  } else {
3022  samples = FFMIN(1024, chunk_samples);
3023  size = samples * sc->sample_size;
3024  }
3025  }
3026 
3027  if (st->nb_index_entries >= total) {
3028  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
3029  return;
3030  }
3031  if (size > 0x3FFFFFFF) {
3032  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
3033  return;
3034  }
3035  e = &st->index_entries[st->nb_index_entries++];
3036  e->pos = current_offset;
3037  e->timestamp = current_dts;
3038  e->size = size;
3039  e->min_distance = 0;
3040  e->flags = AVINDEX_KEYFRAME;
3041  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
3042  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
3043  size, samples);
3044 
3045  current_offset += size;
3046  current_dts += samples;
3047  chunk_samples -= samples;
3048  }
3049  }
3050  }
3051 }
3052 
3053 static int test_same_origin(const char *src, const char *ref) {
3054  char src_proto[64];
3055  char ref_proto[64];
3056  char src_auth[256];
3057  char ref_auth[256];
3058  char src_host[256];
3059  char ref_host[256];
3060  int src_port=-1;
3061  int ref_port=-1;
3062 
3063  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
3064  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
3065 
3066  if (strlen(src) == 0) {
3067  return -1;
3068  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
3069  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
3070  strlen(src_host) + 1 >= sizeof(src_host) ||
3071  strlen(ref_host) + 1 >= sizeof(ref_host)) {
3072  return 0;
3073  } else if (strcmp(src_proto, ref_proto) ||
3074  strcmp(src_auth, ref_auth) ||
3075  strcmp(src_host, ref_host) ||
3076  src_port != ref_port) {
3077  return 0;
3078  } else
3079  return 1;
3080 }
3081 
3082 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
3083 {
3084  /* try relative path, we do not try the absolute because it can leak information about our
3085  system to an attacker */
3086  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
3087  char filename[1025];
3088  const char *src_path;
3089  int i, l;
3090 
3091  /* find a source dir */
3092  src_path = strrchr(src, '/');
3093  if (src_path)
3094  src_path++;
3095  else
3096  src_path = src;
3097 
3098  /* find a next level down to target */
3099  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
3100  if (ref->path[l] == '/') {
3101  if (i == ref->nlvl_to - 1)
3102  break;
3103  else
3104  i++;
3105  }
3106 
3107  /* compose filename if next level down to target was found */
3108  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3109  memcpy(filename, src, src_path - src);
3110  filename[src_path - src] = 0;
3111 
3112  for (i = 1; i < ref->nlvl_from; i++)
3113  av_strlcat(filename, "../", sizeof(filename));
3114 
3115  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3116  if (!c->use_absolute_path) {
3117  int same_origin = test_same_origin(src, filename);
3118 
3119  if (!same_origin) {
3120  av_log(c->fc, AV_LOG_ERROR,
3121  "Reference with mismatching origin, %s not tried for security reasons, "
3122  "set demuxer option use_absolute_path to allow it anyway\n",
3123  ref->path);
3124  return AVERROR(ENOENT);
3125  }
3126 
3127  if(strstr(ref->path + l + 1, "..") ||
3128  strstr(ref->path + l + 1, ":") ||
3129  (ref->nlvl_from > 1 && same_origin < 0) ||
3130  (filename[0] == '/' && src_path == src))
3131  return AVERROR(ENOENT);
3132  }
3133 
3134  if (strlen(filename) + 1 == sizeof(filename))
3135  return AVERROR(ENOENT);
3136  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3137  return 0;
3138  }
3139  } else if (c->use_absolute_path) {
3140  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3141  "this is a possible security issue\n");
3142  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3143  return 0;
3144  } else {
3145  av_log(c->fc, AV_LOG_ERROR,
3146  "Absolute path %s not tried for security reasons, "
3147  "set demuxer option use_absolute_path to allow absolute paths\n",
3148  ref->path);
3149  }
3150 
3151  return AVERROR(ENOENT);
3152 }
3153 
3155 {
3156  if (sc->time_scale <= 0) {
3157  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3158  sc->time_scale = c->time_scale;
3159  if (sc->time_scale <= 0)
3160  sc->time_scale = 1;
3161  }
3162 }
3163 
3165 {
3166  AVStream *st;
3167  MOVStreamContext *sc;
3168  int ret;
3169 
3170  st = avformat_new_stream(c->fc, NULL);
3171  if (!st) return AVERROR(ENOMEM);
3172  st->id = c->fc->nb_streams;
3173  sc = av_mallocz(sizeof(MOVStreamContext));
3174  if (!sc) return AVERROR(ENOMEM);
3175 
3176  st->priv_data = sc;
3178  sc->ffindex = st->index;
3179  c->trak_index = st->index;
3180 
3181  if ((ret = mov_read_default(c, pb, atom)) < 0)
3182  return ret;
3183 
3184  c->trak_index = -1;
3185 
3186  /* sanity checks */
3187  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3188  (!sc->sample_size && !sc->sample_count))) {
3189  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3190  st->index);
3191  return 0;
3192  }
3193 
3194  fix_timescale(c, sc);
3195 
3196  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3197 
3198  mov_build_index(c, st);
3199 
3200  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3201  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3202  if (c->enable_drefs) {
3203  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3204  av_log(c->fc, AV_LOG_ERROR,
3205  "stream %d, error opening alias: path='%s', dir='%s', "
3206  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3207  st->index, dref->path, dref->dir, dref->filename,
3208  dref->volume, dref->nlvl_from, dref->nlvl_to);
3209  } else {
3210  av_log(c->fc, AV_LOG_WARNING,
3211  "Skipped opening external track: "
3212  "stream %d, alias: path='%s', dir='%s', "
3213  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3214  "Set enable_drefs to allow this.\n",
3215  st->index, dref->path, dref->dir, dref->filename,
3216  dref->volume, dref->nlvl_from, dref->nlvl_to);
3217  }
3218  } else {
3219  sc->pb = c->fc->pb;
3220  sc->pb_is_copied = 1;
3221  }
3222 
3223  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3224  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3225  sc->height && sc->width &&
3226  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3227  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3228  ((double)st->codecpar->width * sc->height), INT_MAX);
3229  }
3230 
3231 #if FF_API_R_FRAME_RATE
3232  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3234  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3235 #endif
3236  }
3237 
3238  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3239  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3240  TAG_IS_AVCI(st->codecpar->codec_tag)) {
3241  ret = ff_generate_avci_extradata(st);
3242  if (ret < 0)
3243  return ret;
3244  }
3245 
3246  switch (st->codecpar->codec_id) {
3247 #if CONFIG_H261_DECODER
3248  case AV_CODEC_ID_H261:
3249 #endif
3250 #if CONFIG_H263_DECODER
3251  case AV_CODEC_ID_H263:
3252 #endif
3253 #if CONFIG_MPEG4_DECODER
3254  case AV_CODEC_ID_MPEG4:
3255 #endif
3256  st->codecpar->width = 0; /* let decoder init width/height */
3257  st->codecpar->height= 0;
3258  break;
3259  }
3260 
3261  // If the duration of the mp3 packets is not constant, then they could need a parser
3262  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3263  && sc->stts_count > 3
3264  && sc->stts_count*10 > st->nb_frames
3265  && sc->time_scale == st->codecpar->sample_rate) {
3267  }
3268  /* Do not need those anymore. */
3269  av_freep(&sc->chunk_offsets);
3270  av_freep(&sc->sample_sizes);
3271  av_freep(&sc->keyframes);
3272  av_freep(&sc->stts_data);
3273  av_freep(&sc->stps_data);
3274  av_freep(&sc->elst_data);
3275  av_freep(&sc->rap_group);
3276 
3277  return 0;
3278 }
3279 
3281 {
3282  int ret;
3283  c->itunes_metadata = 1;
3284  ret = mov_read_default(c, pb, atom);
3285  c->itunes_metadata = 0;
3286  return ret;
3287 }
3288 
3290 {
3291  uint32_t count;
3292  uint32_t i;
3293 
3294  if (atom.size < 8)
3295  return 0;
3296 
3297  avio_skip(pb, 4);
3298  count = avio_rb32(pb);
3299  if (count > UINT_MAX / sizeof(*c->meta_keys)) {
3300  av_log(c->fc, AV_LOG_ERROR,
3301  "The 'keys' atom with the invalid key count: %d\n", count);
3302  return AVERROR_INVALIDDATA;
3303  }
3304 
3305  c->meta_keys_count = count + 1;
3306  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3307  if (!c->meta_keys)
3308  return AVERROR(ENOMEM);
3309 
3310  for (i = 1; i <= count; ++i) {
3311  uint32_t key_size = avio_rb32(pb);
3312  uint32_t type = avio_rl32(pb);
3313  if (key_size < 8) {
3314  av_log(c->fc, AV_LOG_ERROR,
3315  "The key# %d in meta has invalid size: %d\n", i, key_size);
3316  return AVERROR_INVALIDDATA;
3317  }
3318  key_size -= 8;
3319  if (type != MKTAG('m','d','t','a')) {
3320  avio_skip(pb, key_size);
3321  }
3322  c->meta_keys[i] = av_mallocz(key_size + 1);
3323  if (!c->meta_keys[i])
3324  return AVERROR(ENOMEM);
3325  avio_read(pb, c->meta_keys[i], key_size);
3326  }
3327 
3328  return 0;
3329 }
3330 
3332 {
3333  int64_t end = avio_tell(pb) + atom.size;
3334  uint8_t *key = NULL, *val = NULL, *mean = NULL;
3335  int i;
3336  int ret = 0;
3337  AVStream *st;
3338  MOVStreamContext *sc;
3339 
3340  if (c->fc->nb_streams < 1)
3341  return 0;
3342  st = c->fc->streams[c->fc->nb_streams-1];
3343  sc = st->priv_data;
3344 
3345  for (i = 0; i < 3; i++) {
3346  uint8_t **p;
3347  uint32_t len, tag;
3348 
3349  if (end - avio_tell(pb) <= 12)
3350  break;
3351 
3352  len = avio_rb32(pb);
3353  tag = avio_rl32(pb);
3354  avio_skip(pb, 4); // flags
3355 
3356  if (len < 12 || len - 12 > end - avio_tell(pb))
3357  break;
3358  len -= 12;
3359 
3360  if (tag == MKTAG('m', 'e', 'a', 'n'))
3361  p = &mean;
3362  else if (tag == MKTAG('n', 'a', 'm', 'e'))
3363  p = &key;
3364  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3365  avio_skip(pb, 4);
3366  len -= 4;
3367  p = &val;
3368  } else
3369  break;
3370 
3371  *p = av_malloc(len + 1);
3372  if (!*p)
3373  break;
3374  ret = ffio_read_size(pb, *p, len);
3375  if (ret < 0) {
3376  av_freep(p);
3377  break;
3378  }
3379  (*p)[len] = 0;
3380  }
3381 
3382  if (mean && key && val) {
3383  if (strcmp(key, "iTunSMPB") == 0) {
3384  int priming, remainder, samples;
3385  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3386  if(priming>0 && priming<16384)
3387  sc->start_pad = priming;
3388  }
3389  }
3390  if (strcmp(key, "cdec") != 0) {
3391  av_dict_set(&c->fc->metadata, key, val,
3393  key = val = NULL;
3394  }
3395  } else {
3396  av_log(c->fc, AV_LOG_VERBOSE,
3397  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3398  }
3399 
3400  avio_seek(pb, end, SEEK_SET);
3401  av_freep(&key);
3402  av_freep(&val);
3403  av_freep(&mean);
3404  return ret;
3405 }
3406 
3408 {
3409  while (atom.size > 8) {
3410  uint32_t tag = avio_rl32(pb);
3411  atom.size -= 4;
3412  if (tag == MKTAG('h','d','l','r')) {
3413  avio_seek(pb, -8, SEEK_CUR);
3414  atom.size += 8;
3415  return mov_read_default(c, pb, atom);
3416  }
3417  }
3418  return 0;
3419 }
3420 
3422 {
3423  int i;
3424  int width;
3425  int height;
3426  int display_matrix[3][3];
3427  AVStream *st;
3428  MOVStreamContext *sc;
3429  int version;
3430  int flags;
3431 
3432  if (c->fc->nb_streams < 1)
3433  return 0;
3434  st = c->fc->streams[c->fc->nb_streams-1];
3435  sc = st->priv_data;
3436 
3437  version = avio_r8(pb);
3438  flags = avio_rb24(pb);
3440 
3441  if (version == 1) {
3442  avio_rb64(pb);
3443  avio_rb64(pb);
3444  } else {
3445  avio_rb32(pb); /* creation time */
3446  avio_rb32(pb); /* modification time */
3447  }
3448  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
3449  avio_rb32(pb); /* reserved */
3450 
3451  /* highlevel (considering edits) duration in movie timebase */
3452  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
3453  avio_rb32(pb); /* reserved */
3454  avio_rb32(pb); /* reserved */
3455 
3456  avio_rb16(pb); /* layer */
3457  avio_rb16(pb); /* alternate group */
3458  avio_rb16(pb); /* volume */
3459  avio_rb16(pb); /* reserved */
3460 
3461  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
3462  // they're kept in fixed point format through all calculations
3463  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
3464  // side data, but the scale factor is not needed to calculate aspect ratio
3465  for (i = 0; i < 3; i++) {
3466  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
3467  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
3468  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
3469  }
3470 
3471  width = avio_rb32(pb); // 16.16 fixed point track width
3472  height = avio_rb32(pb); // 16.16 fixed point track height
3473  sc->width = width >> 16;
3474  sc->height = height >> 16;
3475 
3476  // save the matrix and add rotate metadata when it is not the default
3477  // identity
3478  if (display_matrix[0][0] != (1 << 16) ||
3479  display_matrix[1][1] != (1 << 16) ||
3480  display_matrix[2][2] != (1 << 30) ||
3481  display_matrix[0][1] || display_matrix[0][2] ||
3482  display_matrix[1][0] || display_matrix[1][2] ||
3483  display_matrix[2][0] || display_matrix[2][1]) {
3484  int i, j;
3485  double rotate;
3486 
3487  av_freep(&sc->display_matrix);
3488  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
3489  if (!sc->display_matrix)
3490  return AVERROR(ENOMEM);
3491 
3492  for (i = 0; i < 3; i++)
3493  for (j = 0; j < 3; j++)
3494  sc->display_matrix[i * 3 + j] = display_matrix[i][j];
3495 
3497  if (!isnan(rotate)) {
3498  char rotate_buf[64];
3499  rotate = -rotate;
3500  if (rotate < 0) // for backward compatibility
3501  rotate += 360;
3502  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
3503  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
3504  }
3505  }
3506 
3507  // transform the display width/height according to the matrix
3508  // to keep the same scale, use [width height 1<<16]
3509  if (width && height && sc->display_matrix) {
3510  double disp_transform[2];
3511 
3512  for (i = 0; i < 2; i++)
3513  disp_transform[i] = hypot(display_matrix[i][0], display_matrix[i][1]);
3514 
3515  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
3516  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
3517  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
3519  disp_transform[0] / disp_transform[1],
3520  INT_MAX);
3521  }
3522  return 0;
3523 }
3524 
3526 {
3527  MOVFragment *frag = &c->fragment;
3528  MOVTrackExt *trex = NULL;
3530  int flags, track_id, i, found = 0;
3531 
3532  avio_r8(pb); /* version */
3533  flags = avio_rb24(pb);
3534 
3535  track_id = avio_rb32(pb);
3536  if (!track_id)
3537  return AVERROR_INVALIDDATA;
3538  frag->track_id = track_id;
3539  for (i = 0; i < c->trex_count; i++)
3540  if (c->trex_data[i].track_id == frag->track_id) {
3541  trex = &c->trex_data[i];
3542  break;
3543  }
3544  if (!trex) {
3545  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
3546  return AVERROR_INVALIDDATA;
3547  }
3548 
3551  frag->moof_offset : frag->implicit_offset;
3552  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
3553 
3554  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
3555  avio_rb32(pb) : trex->duration;
3556  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
3557  avio_rb32(pb) : trex->size;
3558  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
3559  avio_rb32(pb) : trex->flags;
3560  frag->time = AV_NOPTS_VALUE;
3561  for (i = 0; i < c->fragment_index_count; i++) {
3562  int j;
3563  MOVFragmentIndex* candidate = c->fragment_index_data[i];
3564  if (candidate->track_id == frag->track_id) {
3565  av_log(c->fc, AV_LOG_DEBUG,
3566  "found fragment index for track %u\n", frag->track_id);
3567  index = candidate;
3568  for (j = index->current_item; j < index->item_count; j++) {
3569  if (frag->implicit_offset == index->items[j].moof_offset) {
3570  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
3571  "for track %u and moof_offset %"PRId64"\n",
3572  frag->track_id, index->items[j].moof_offset);
3573  frag->time = index->items[j].time;
3574  index->current_item = j + 1;
3575  found = 1;
3576  break;
3577  }
3578  }
3579  if (found)
3580  break;
3581  }
3582  }
3583  if (index && !found) {
3584  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
3585  "it doesn't have an (in-order) entry for moof_offset "
3586  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
3587  }
3588  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
3589  return 0;
3590 }
3591 
3593 {
3594  c->chapter_track = avio_rb32(pb);
3595  return 0;
3596 }
3597 
3599 {
3600  MOVTrackExt *trex;
3601  int err;
3602 
3603  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
3604  return AVERROR_INVALIDDATA;
3605  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
3606  sizeof(*c->trex_data))) < 0) {
3607  c->trex_count = 0;
3608  return err;
3609  }
3610 
3611  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
3612 
3613  trex = &c->trex_data[c->trex_count++];
3614  avio_r8(pb); /* version */
3615  avio_rb24(pb); /* flags */
3616  trex->track_id = avio_rb32(pb);
3617  trex->stsd_id = avio_rb32(pb);
3618  trex->duration = avio_rb32(pb);
3619  trex->size = avio_rb32(pb);
3620  trex->flags = avio_rb32(pb);
3621  return 0;
3622 }
3623 
3625 {
3626  MOVFragment *frag = &c->fragment;
3627  AVStream *st = NULL;
3628  MOVStreamContext *sc;
3629  int version, i;
3630 
3631  for (i = 0; i < c->fc->nb_streams; i++) {
3632  if (c->fc->streams[i]->id == frag->track_id) {
3633  st = c->fc->streams[i];
3634  break;
3635  }
3636  }
3637  if (!st) {
3638  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3639  return AVERROR_INVALIDDATA;
3640  }
3641  sc = st->priv_data;
3642  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
3643  return 0;
3644  version = avio_r8(pb);
3645  avio_rb24(pb); /* flags */
3646  if (version) {
3647  sc->track_end = avio_rb64(pb);
3648  } else {
3649  sc->track_end = avio_rb32(pb);
3650  }
3651  return 0;
3652 }
3653 
3655 {
3656  MOVFragment *frag = &c->fragment;
3657  AVStream *st = NULL;
3658  MOVStreamContext *sc;
3659  MOVStts *ctts_data;
3660  uint64_t offset;
3661  int64_t dts;
3662  int data_offset = 0;
3663  unsigned entries, first_sample_flags = frag->flags;
3664  int flags, distance, i, err;
3665 
3666  for (i = 0; i < c->fc->nb_streams; i++) {
3667  if (c->fc->streams[i]->id == frag->track_id) {
3668  st = c->fc->streams[i];
3669  break;
3670  }
3671  }
3672  if (!st) {
3673  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3674  return AVERROR_INVALIDDATA;
3675  }
3676  sc = st->priv_data;
3677  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
3678  return 0;
3679  avio_r8(pb); /* version */
3680  flags = avio_rb24(pb);
3681  entries = avio_rb32(pb);
3682  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %d\n", flags, entries);
3683 
3684  /* Always assume the presence of composition time offsets.
3685  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
3686  * 1) in the initial movie, there are no samples.
3687  * 2) in the first movie fragment, there is only one sample without composition time offset.
3688  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
3689  if (!sc->ctts_count && sc->sample_count)
3690  {
3691  /* Complement ctts table if moov atom doesn't have ctts atom. */
3692  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
3693  if (!ctts_data)
3694  return AVERROR(ENOMEM);
3695  sc->ctts_data = ctts_data;
3696  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
3697  sc->ctts_data[sc->ctts_count].duration = 0;
3698  sc->ctts_count++;
3699  }
3700  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
3701  return AVERROR_INVALIDDATA;
3702  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
3703  sizeof(*sc->ctts_data))) < 0) {
3704  sc->ctts_count = 0;
3705  return err;
3706  }
3707  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
3708  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
3709  dts = sc->track_end - sc->time_offset;
3710  offset = frag->base_data_offset + data_offset;
3711  distance = 0;
3712  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
3713  for (i = 0; i < entries && !pb->eof_reached; i++) {
3714  unsigned sample_size = frag->size;
3715  int sample_flags = i ? frag->flags : first_sample_flags;
3716  unsigned sample_duration = frag->duration;
3717  int keyframe = 0;
3718 
3719  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
3720  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
3721  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
3722  sc->ctts_data[sc->ctts_count].count = 1;
3723  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
3724  avio_rb32(pb) : 0;
3726  if (frag->time != AV_NOPTS_VALUE) {
3727  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
3728  int64_t pts = frag->time;
3729  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3730  " sc->dts_shift %d ctts.duration %d"
3731  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
3732  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
3733  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
3734  dts = pts - sc->dts_shift;
3735  if (flags & MOV_TRUN_SAMPLE_CTS) {
3736  dts -= sc->ctts_data[sc->ctts_count].duration;
3737  } else {
3738  dts -= sc->time_offset;
3739  }
3740  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
3741  } else {
3742  dts = frag->time - sc->time_offset;
3743  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3744  ", using it for dts\n", dts);
3745  }
3746  frag->time = AV_NOPTS_VALUE;
3747  }
3748  sc->ctts_count++;
3750  keyframe = 1;
3751  else
3752  keyframe =
3753  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
3755  if (keyframe)
3756  distance = 0;
3757  err = av_add_index_entry(st, offset, dts, sample_size, distance,
3758  keyframe ? AVINDEX_KEYFRAME : 0);
3759  if (err < 0) {
3760  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
3761  }
3762  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3763  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
3764  offset, dts, sample_size, distance, keyframe);
3765  distance++;
3766  dts += sample_duration;
3767  offset += sample_size;
3768  sc->data_size += sample_size;
3769  sc->duration_for_fps += sample_duration;
3770  sc->nb_frames_for_fps ++;
3771  }
3772 
3773  if (pb->eof_reached)
3774  return AVERROR_EOF;
3775 
3776  frag->implicit_offset = offset;
3777 
3778  sc->track_end = dts + sc->time_offset;
3779  if (st->duration < sc->track_end)
3780  st->duration = sc->track_end;
3781 
3782  return 0;
3783 }
3784 
3786 {
3787  int64_t offset = avio_tell(pb) + atom.size, pts;
3788  uint8_t version;
3789  unsigned i, track_id;
3790  AVStream *st = NULL;
3791  MOVStreamContext *sc;
3794  AVRational timescale;
3795 
3796  version = avio_r8(pb);
3797  if (version > 1) {
3798  avpriv_request_sample(c->fc, "sidx version %u", version);
3799  return 0;
3800  }
3801 
3802  avio_rb24(pb); // flags
3803 
3804  track_id = avio_rb32(pb); // Reference ID
3805  for (i = 0; i < c->fc->nb_streams; i++) {
3806  if (c->fc->streams[i]->id == track_id) {
3807  st = c->fc->streams[i];
3808  break;
3809  }
3810  }
3811  if (!st) {
3812  av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
3813  return 0;
3814  }
3815 
3816  sc = st->priv_data;
3817 
3818  timescale = av_make_q(1, avio_rb32(pb));
3819 
3820  if (version == 0) {
3821  pts = avio_rb32(pb);
3822  offset += avio_rb32(pb);
3823  } else {
3824  pts = avio_rb64(pb);
3825  offset += avio_rb64(pb);
3826  }
3827 
3828  avio_rb16(pb); // reserved
3829 
3830  index = av_mallocz(sizeof(MOVFragmentIndex));
3831  if (!index)
3832  return AVERROR(ENOMEM);
3833 
3834  index->track_id = track_id;
3835 
3836  index->item_count = avio_rb16(pb);
3837  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
3838 
3839  if (!index->items) {
3840  av_freep(&index);
3841  return AVERROR(ENOMEM);
3842  }
3843 
3844  for (i = 0; i < index->item_count; i++) {
3845  uint32_t size = avio_rb32(pb);
3846  uint32_t duration = avio_rb32(pb);
3847  if (size & 0x80000000) {
3848  avpriv_request_sample(c->fc, "sidx reference_type 1");
3849  av_freep(&index->items);
3850  av_freep(&index);
3851  return AVERROR_PATCHWELCOME;
3852  }
3853  avio_rb32(pb); // sap_flags
3854  index->items[i].moof_offset = offset;
3855  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
3856  offset += size;
3857  pts += duration;
3858  }
3859 
3860  st->duration = sc->track_end = pts;
3861 
3863  c->fragment_index_count + 1,
3864  sizeof(MOVFragmentIndex*));
3865  if (!tmp) {
3866  av_freep(&index->items);
3867  av_freep(&index);
3868  return AVERROR(ENOMEM);
3869  }
3870 
3871  c->fragment_index_data = tmp;
3873 
3874  if (offset == avio_size(pb))
3875  c->fragment_index_complete = 1;
3876 
3877  return 0;
3878 }
3879 
3880 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
3881 /* like the files created with Adobe Premiere 5.0, for samples see */
3882 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
3884 {
3885  int err;
3886 
3887  if (atom.size < 8)
3888  return 0; /* continue */
3889  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
3890  avio_skip(pb, atom.size - 4);
3891  return 0;
3892  }
3893  atom.type = avio_rl32(pb);
3894  atom.size -= 8;
3895  if (atom.type != MKTAG('m','d','a','t')) {
3896  avio_skip(pb, atom.size);
3897  return 0;
3898  }
3899  err = mov_read_mdat(c, pb, atom);
3900  return err;
3901 }
3902 
3904 {
3905 #if CONFIG_ZLIB
3906  AVIOContext ctx;
3907  uint8_t *cmov_data;
3908  uint8_t *moov_data; /* uncompressed data */
3909  long cmov_len, moov_len;
3910  int ret = -1;
3911 
3912  avio_rb32(pb); /* dcom atom */
3913  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
3914  return AVERROR_INVALIDDATA;
3915  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
3916  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
3917  return AVERROR_INVALIDDATA;
3918  }
3919  avio_rb32(pb); /* cmvd atom */
3920  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
3921  return AVERROR_INVALIDDATA;
3922  moov_len = avio_rb32(pb); /* uncompressed size */
3923  cmov_len = atom.size - 6 * 4;
3924 
3925  cmov_data = av_malloc(cmov_len);
3926  if (!cmov_data)
3927  return AVERROR(ENOMEM);
3928  moov_data = av_malloc(moov_len);
3929  if (!moov_data) {
3930  av_free(cmov_data);
3931  return AVERROR(ENOMEM);
3932  }
3933  ret = ffio_read_size(pb, cmov_data, cmov_len);
3934  if (ret < 0)
3935  goto free_and_return;
3936 
3937  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
3938  goto free_and_return;
3939  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
3940  goto free_and_return;
3942  atom.type = MKTAG('m','o','o','v');
3943  atom.size = moov_len;
3944  ret = mov_read_default(c, &ctx, atom);
3945 free_and_return:
3946  av_free(moov_data);
3947  av_free(cmov_data);
3948  return ret;
3949 #else
3950  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
3951  return AVERROR(ENOSYS);
3952 #endif
3953 }
3954 
3955 /* edit list atom */
3957 {
3958  MOVStreamContext *sc;
3959  int i, edit_count, version;
3960 
3961  if (c->fc->nb_streams < 1 || c->ignore_editlist)
3962  return 0;
3963  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
3964 
3965  version = avio_r8(pb); /* version */
3966  avio_rb24(pb); /* flags */
3967  edit_count = avio_rb32(pb); /* entries */
3968 
3969  if (!edit_count)
3970  return 0;
3971  if (sc->elst_data)
3972  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
3973  av_free(sc->elst_data);
3974  sc->elst_count = 0;
3975  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
3976  if (!sc->elst_data)
3977  return AVERROR(ENOMEM);
3978 
3979  av_log(c->fc, AV_LOG_TRACE, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3980  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
3981  MOVElst *e = &sc->elst_data[i];
3982 
3983  if (version == 1) {
3984  e->duration = avio_rb64(pb);
3985  e->time = avio_rb64(pb);
3986  } else {
3987  e->duration = avio_rb32(pb); /* segment duration */
3988  e->time = (int32_t)avio_rb32(pb); /* media time */
3989  }
3990  e->rate = avio_rb32(pb) / 65536.0;
3991  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3992  e->duration, e->time, e->rate);
3993  }
3994  sc->elst_count = i;
3995 
3996  return 0;
3997 }
3998 
4000 {
4001  MOVStreamContext *sc;
4002 
4003  if (c->fc->nb_streams < 1)
4004  return AVERROR_INVALIDDATA;
4005  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4006  sc->timecode_track = avio_rb32(pb);
4007  return 0;
4008 }
4009 
4011 {
4012  int ret;
4013  uint8_t uuid[16];
4014  static const uint8_t uuid_isml_manifest[] = {
4015  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
4016  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
4017  };
4018  static const uint8_t uuid_xmp[] = {
4019  0xbe, 0x7a, 0xcf, 0xcb, 0x97, 0xa9, 0x42, 0xe8,
4020  0x9c, 0x71, 0x99, 0x94, 0x91, 0xe3, 0xaf, 0xac
4021  };
4022 
4023  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
4024  return AVERROR_INVALIDDATA;
4025 
4026  ret = avio_read(pb, uuid, sizeof(uuid));
4027  if (ret < 0) {
4028  return ret;
4029  } else if (ret != sizeof(uuid)) {
4030  return AVERROR_INVALIDDATA;
4031  }
4032  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
4033  uint8_t *buffer, *ptr;
4034  char *endptr;
4035  size_t len = atom.size - sizeof(uuid);
4036 
4037  if (len < 4) {
4038  return AVERROR_INVALIDDATA;
4039  }
4040  ret = avio_skip(pb, 4); // zeroes
4041  len -= 4;
4042 
4043  buffer = av_mallocz(len + 1);
4044  if (!buffer) {
4045  return AVERROR(ENOMEM);
4046  }
4047  ret = avio_read(pb, buffer, len);
4048  if (ret < 0) {
4049  av_free(buffer);
4050  return ret;
4051  } else if (ret != len) {
4052  av_free(buffer);
4053  return AVERROR_INVALIDDATA;
4054  }
4055 
4056  ptr = buffer;
4057  while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
4058  ptr += sizeof("systemBitrate=\"") - 1;
4059  c->bitrates_count++;
4060  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
4061  if (!c->bitrates) {
4062  c->bitrates_count = 0;
4063  av_free(buffer);
4064  return AVERROR(ENOMEM);
4065  }
4066  errno = 0;
4067  ret = strtol(ptr, &endptr, 10);
4068  if (ret < 0 || errno || *endptr != '"') {
4069  c->bitrates[c->bitrates_count - 1] = 0;
4070  } else {
4071  c->bitrates[c->bitrates_count - 1] = ret;
4072  }
4073  }
4074 
4075  av_free(buffer);
4076  } else if (!memcmp(uuid, uuid_xmp, sizeof(uuid))) {
4077  uint8_t *buffer;
4078  size_t len = atom.size - sizeof(uuid);
4079 
4080  buffer = av_mallocz(len + 1);
4081  if (!buffer) {
4082  return AVERROR(ENOMEM);
4083  }
4084  ret = avio_read(pb, buffer, len);
4085  if (ret < 0) {
4086  av_free(buffer);
4087  return ret;
4088  } else if (ret != len) {
4089  av_free(buffer);
4090  return AVERROR_INVALIDDATA;
4091  }
4092  if (c->export_xmp) {
4093  buffer[len] = '\0';
4094  av_dict_set(&c->fc->metadata, "xmp", buffer, 0);
4095  }
4096  av_free(buffer);
4097  }
4098  return 0;
4099 }
4100 
4102 {
4103  int ret;
4104  uint8_t content[16];
4105 
4106  if (atom.size < 8)
4107  return 0;
4108 
4109  ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
4110  if (ret < 0)
4111  return ret;
4112 
4113  if ( !c->found_moov
4114  && !c->found_mdat
4115  && !memcmp(content, "Anevia\x1A\x1A", 8)
4118  }
4119 
4120  return 0;
4121 }
4122 
4124 {
4125  uint32_t format = avio_rl32(pb);
4126  MOVStreamContext *sc;
4127  enum AVCodecID id;
4128  AVStream *st;
4129 
4130  if (c->fc->nb_streams < 1)
4131  return 0;
4132  st = c->fc->streams[c->fc->nb_streams - 1];
4133  sc = st->priv_data;
4134 
4135  switch (sc->format)
4136  {
4137  case MKTAG('e','n','c','v'): // encrypted video
4138  case MKTAG('e','n','c','a'): // encrypted audio
4139  id = mov_codec_id(st, format);
4140  if (st->codecpar->codec_id != AV_CODEC_ID_NONE &&
4141  st->codecpar->codec_id != id) {
4142  av_log(c->fc, AV_LOG_WARNING,
4143  "ignoring 'frma' atom of '%.4s', stream has codec id %d\n",
4144  (char*)&format, st->codecpar->codec_id);
4145  break;
4146  }
4147 
4148  st->codecpar->codec_id = id;
4149  sc->format = format;
4150  break;
4151 
4152  default:
4153  if (format != sc->format) {
4154  av_log(c->fc, AV_LOG_WARNING,
4155  "ignoring 'frma' atom of '%.4s', stream format is '%.4s'\n",
4156  (char*)&format, (char*)&sc->format);
4157  }
4158  break;
4159  }
4160 
4161  return 0;
4162 }
4163 
4165 {
4166  AVStream *st;
4167  MOVStreamContext *sc;
4168  size_t auxiliary_info_size;
4169 
4170  if (c->decryption_key_len == 0 || c->fc->nb_streams < 1)
4171  return 0;
4172 
4173  st = c->fc->streams[c->fc->nb_streams - 1];
4174  sc = st->priv_data;
4175 
4176  if (sc->cenc.aes_ctr) {
4177  av_log(c->fc, AV_LOG_ERROR, "duplicate senc atom\n");
4178  return AVERROR_INVALIDDATA;
4179  }
4180 
4181  avio_r8(pb); /* version */
4182  sc->cenc.use_subsamples = avio_rb24(pb) & 0x02; /* flags */
4183 
4184  avio_rb32(pb); /* entries */
4185 
4186  if (atom.size < 8) {
4187  av_log(c->fc, AV_LOG_ERROR, "senc atom size %"PRId64" too small\n", atom.size);
4188  return AVERROR_INVALIDDATA;
4189  }
4190 
4191  /* save the auxiliary info as is */
4192  auxiliary_info_size = atom.size - 8;
4193 
4194  sc->cenc.auxiliary_info = av_malloc(auxiliary_info_size);
4195  if (!sc->cenc.auxiliary_info) {
4196  return AVERROR(ENOMEM);
4197  }
4198 
4199  sc->cenc.auxiliary_info_end = sc->cenc.auxiliary_info + auxiliary_info_size;
4200 
4202 
4203  if (avio_read(pb, sc->cenc.auxiliary_info, auxiliary_info_size) != auxiliary_info_size) {
4204  av_log(c->fc, AV_LOG_ERROR, "failed to read the auxiliary info");
4205  return AVERROR_INVALIDDATA;
4206  }
4207 
4208  /* initialize the cipher */
4209  sc->cenc.aes_ctr = av_aes_ctr_alloc();
4210  if (!sc->cenc.aes_ctr) {
4211  return AVERROR(ENOMEM);
4212  }
4213 
4214  return av_aes_ctr_init(sc->cenc.aes_ctr, c->decryption_key);
4215 }
4216 
4218 {
4219  AVStream *st;
4220  MOVStreamContext *sc;
4221  size_t data_size;
4222  int atom_header_size;
4223  int flags;
4224 
4225  if (c->decryption_key_len == 0 || c->fc->nb_streams < 1)
4226  return 0;
4227 
4228  st = c->fc->streams[c->fc->nb_streams - 1];
4229  sc = st->priv_data;
4230 
4232  av_log(c->fc, AV_LOG_ERROR, "duplicate saiz atom\n");
4233  return AVERROR_INVALIDDATA;
4234  }
4235 
4236  atom_header_size = 9;
4237 
4238  avio_r8(pb); /* version */
4239  flags = avio_rb24(pb);
4240 
4241  if ((flags & 0x01) != 0) {
4242  atom_header_size += 8;
4243 
4244  avio_rb32(pb); /* info type */
4245  avio_rb32(pb); /* info type param */
4246  }
4247 
4249  avio_rb32(pb); /* entries */
4250 
4251  if (atom.size <= atom_header_size) {
4252  return 0;
4253  }
4254 
4255  /* save the auxiliary info sizes as is */
4256  data_size = atom.size - atom_header_size;
4257 
4258  sc->cenc.auxiliary_info_sizes = av_malloc(data_size);
4259  if (!sc->cenc.auxiliary_info_sizes) {
4260  return AVERROR(ENOMEM);
4261  }
4262 
4263  sc->cenc.auxiliary_info_sizes_count = data_size;
4264 
4265  if (avio_read(pb, sc->cenc.auxiliary_info_sizes, data_size) != data_size) {
4266  av_log(c->fc, AV_LOG_ERROR, "failed to read the auxiliary info sizes");
4267  return AVERROR_INVALIDDATA;
4268  }
4269 
4270  return 0;
4271 }
4272 
4273 static int cenc_filter(MOVContext *c, MOVStreamContext *sc, uint8_t *input, int size)
4274 {
4275  uint32_t encrypted_bytes;
4276  uint16_t subsample_count;
4277  uint16_t clear_bytes;
4278  uint8_t* input_end = input + size;
4279 
4280  /* read the iv */
4282  av_log(c->fc, AV_LOG_ERROR, "failed to read iv from the auxiliary info\n");
4283  return AVERROR_INVALIDDATA;
4284  }
4285 
4288 
4289  if (!sc->cenc.use_subsamples)
4290  {
4291  /* decrypt the whole packet */
4292  av_aes_ctr_crypt(sc->cenc.aes_ctr, input, input, size);
4293  return 0;
4294  }
4295 
4296  /* read the subsample count */
4297  if (sizeof(uint16_t) > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) {
4298  av_log(c->fc, AV_LOG_ERROR, "failed to read subsample count from the auxiliary info\n");
4299  return AVERROR_INVALIDDATA;
4300  }
4301 
4302  subsample_count = AV_RB16(sc->cenc.auxiliary_info_pos);
4303  sc->cenc.auxiliary_info_pos += sizeof(uint16_t);
4304 
4305  for (; subsample_count > 0; subsample_count--)
4306  {
4307  if (6 > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) {
4308  av_log(c->fc, AV_LOG_ERROR, "failed to read subsample from the auxiliary info\n");
4309  return AVERROR_INVALIDDATA;
4310  }
4311 
4312  /* read the number of clear / encrypted bytes */
4313  clear_bytes = AV_RB16(sc->cenc.auxiliary_info_pos);
4314  sc->cenc.auxiliary_info_pos += sizeof(uint16_t);
4315  encrypted_bytes = AV_RB32(sc->cenc.auxiliary_info_pos);
4316  sc->cenc.auxiliary_info_pos += sizeof(uint32_t);
4317 
4318  if ((uint64_t)clear_bytes + encrypted_bytes > input_end - input) {
4319  av_log(c->fc, AV_LOG_ERROR, "subsample size exceeds the packet size left\n");
4320  return AVERROR_INVALIDDATA;
4321  }
4322 
4323  /* skip the clear bytes */
4324  input += clear_bytes;
4325 
4326  /* decrypt the encrypted bytes */
4327  av_aes_ctr_crypt(sc->cenc.aes_ctr, input, input, encrypted_bytes);
4328  input += encrypted_bytes;
4329  }
4330 
4331  if (input < input_end) {
4332  av_log(c->fc, AV_LOG_ERROR, "leftover packet bytes after subsample processing\n");
4333  return AVERROR_INVALIDDATA;
4334  }
4335 
4336  return 0;
4337 }
4338 
4340 {
4341  size_t auxiliary_info_seek_offset = 0;
4342  int i;
4343 
4345  auxiliary_info_seek_offset = (size_t)sc->cenc.auxiliary_info_default_size * sc->current_sample;
4346  } else if (sc->cenc.auxiliary_info_sizes) {
4348  av_log(s, AV_LOG_ERROR, "current sample %d greater than the number of auxiliary info sample sizes %"SIZE_SPECIFIER"\n",
4350  return AVERROR_INVALIDDATA;
4351  }
4352 
4353  for (i = 0; i < sc->current_sample; i++) {
4354  auxiliary_info_seek_offset += sc->cenc.auxiliary_info_sizes[i];
4355  }
4356  }
4357 
4358  if (auxiliary_info_seek_offset > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info) {
4359  av_log(s, AV_LOG_ERROR, "auxiliary info offset %"SIZE_SPECIFIER" greater than auxiliary info size %"SIZE_SPECIFIER"\n",
4360  auxiliary_info_seek_offset, (size_t)(sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info));
4361  return AVERROR_INVALIDDATA;
4362  }
4363 
4364  sc->cenc.auxiliary_info_pos = sc->cenc.auxiliary_info + auxiliary_info_seek_offset;
4365 
4366  return 0;
4367 }
4368 
4370 { MKTAG('A','C','L','R'), mov_read_aclr },
4371 { MKTAG('A','P','R','G'), mov_read_avid },
4372 { MKTAG('A','A','L','P'), mov_read_avid },
4373 { MKTAG('A','R','E','S'), mov_read_ares },
4374 { MKTAG('a','v','s','s'), mov_read_avss },
4375 { MKTAG('c','h','p','l'), mov_read_chpl },
4376 { MKTAG('c','o','6','4'), mov_read_stco },
4377 { MKTAG('c','o','l','r'), mov_read_colr },
4378 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
4379 { MKTAG('d','i','n','f'), mov_read_default },
4380 { MKTAG('D','p','x','E'), mov_read_dpxe },
4381 { MKTAG('d','r','e','f'), mov_read_dref },
4382 { MKTAG('e','d','t','s'), mov_read_default },
4383 { MKTAG('e','l','s','t'), mov_read_elst },
4384 { MKTAG('e','n','d','a'), mov_read_enda },
4385 { MKTAG('f','i','e','l'), mov_read_fiel },
4386 { MKTAG('a','d','r','m'), mov_read_adrm },
4387 { MKTAG('f','t','y','p'), mov_read_ftyp },
4388 { MKTAG('g','l','b','l'), mov_read_glbl },
4389 { MKTAG('h','d','l','r'), mov_read_hdlr },
4390 { MKTAG('i','l','s','t'), mov_read_ilst },
4391 { MKTAG('j','p','2','h'), mov_read_jp2h },
4392 { MKTAG('m','d','a','t'), mov_read_mdat },
4393 { MKTAG('m','d','h','d'), mov_read_mdhd },
4394 { MKTAG('m','d','i','a'), mov_read_default },
4395 { MKTAG('m','e','t','a'), mov_read_meta },
4396 { MKTAG('m','i','n','f'), mov_read_default },
4397 { MKTAG('m','o','o','f'), mov_read_moof },
4398 { MKTAG('m','o','o','v'), mov_read_moov },
4399 { MKTAG('m','v','e','x'), mov_read_default },
4400 { MKTAG('m','v','h','d'), mov_read_mvhd },
4401 { MKTAG('S','M','I',' '), mov_read_svq3 },
4402 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
4403 { MKTAG('a','v','c','C'), mov_read_glbl },
4404 { MKTAG('p','a','s','p'), mov_read_pasp },
4405 { MKTAG('s','i','d','x'), mov_read_sidx },
4406 { MKTAG('s','t','b','l'), mov_read_default },
4407 { MKTAG('s','t','c','o'), mov_read_stco },
4408 { MKTAG('s','t','p','s'), mov_read_stps },
4409 { MKTAG('s','t','r','f'), mov_read_strf },
4410 { MKTAG('s','t','s','c'), mov_read_stsc },
4411 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
4412 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
4413 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
4414 { MKTAG('s','t','t','s'), mov_read_stts },
4415 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
4416 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
4417 { MKTAG('t','f','d','t'), mov_read_tfdt },
4418 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
4419 { MKTAG('t','r','a','k'), mov_read_trak },
4420 { MKTAG('t','r','a','f'), mov_read_default },
4421 { MKTAG('t','r','e','f'), mov_read_default },
4422 { MKTAG('t','m','c','d'), mov_read_tmcd },
4423 { MKTAG('c','h','a','p'), mov_read_chap },
4424 { MKTAG('t','r','e','x'), mov_read_trex },
4425 { MKTAG('t','r','u','n'), mov_read_trun },
4426 { MKTAG('u','d','t','a'), mov_read_default },
4427 { MKTAG('w','a','v','e'), mov_read_wave },
4428 { MKTAG('e','s','d','s'), mov_read_esds },
4429 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
4430 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
4431 { MKTAG('d','d','t','s'), mov_read_ddts }, /* DTS audio descriptor */
4432 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
4433 { MKTAG('w','f','e','x'), mov_read_wfex },
4434 { MKTAG('c','m','o','v'), mov_read_cmov },
4435 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
4436 { MKTAG('d','v','c','1'), mov_read_dvc1 },
4437 { MKTAG('s','b','g','p'), mov_read_sbgp },
4438 { MKTAG('h','v','c','C'), mov_read_glbl },
4439 { MKTAG('u','u','i','d'), mov_read_uuid },
4440 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
4441 { MKTAG('f','r','e','e'), mov_read_free },
4442 { MKTAG('-','-','-','-'), mov_read_custom },
4443 { MKTAG('s','i','n','f'), mov_read_default },
4444 { MKTAG('f','r','m','a'), mov_read_frma },
4445 { MKTAG('s','e','n','c'), mov_read_senc },
4446 { MKTAG('s','a','i','z'), mov_read_saiz },
4447 { 0, NULL }
4448 };
4449 
4451 {
4452  int64_t total_size = 0;
4453  MOVAtom a;
4454  int i;
4455 
4456  if (c->atom_depth > 10) {
4457  av_log(c->fc, AV_LOG_ERROR, "Atoms too deeply nested\n");
4458  return AVERROR_INVALIDDATA;
4459  }
4460  c->atom_depth ++;
4461 
4462  if (atom.size < 0)
4463  atom.size = INT64_MAX;
4464  while (total_size + 8 <= atom.size && !avio_feof(pb)) {
4465  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
4466  a.size = atom.size;
4467  a.type=0;
4468  if (atom.size >= 8) {
4469  a.size = avio_rb32(pb);
4470  a.type = avio_rl32(pb);
4471  if (a.type == MKTAG('f','r','e','e') &&
4472  a.size >= 8 &&
4473  c->moov_retry) {
4474  uint8_t buf[8];
4475  uint32_t *type = (uint32_t *)buf + 1;
4476  if (avio_read(pb, buf, 8) != 8)
4477  return AVERROR_INVALIDDATA;
4478  avio_seek(pb, -8, SEEK_CUR);
4479  if (*type == MKTAG('m','v','h','d') ||
4480  *type == MKTAG('c','m','o','v')) {
4481  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
4482  a.type = MKTAG('m','o','o','v');
4483  }
4484  }
4485  if (atom.type != MKTAG('r','o','o','t') &&
4486  atom.type != MKTAG('m','o','o','v'))
4487  {
4488  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
4489  {
4490  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
4491  avio_skip(pb, -8);
4492  c->atom_depth --;
4493  return 0;
4494  }
4495  }
4496  total_size += 8;
4497  if (a.size == 1 && total_size + 8 <= atom.size) { /* 64 bit extended size */
4498  a.size = avio_rb64(pb) - 8;
4499  total_size += 8;
4500  }
4501  }
4502  av_log(c->fc, AV_LOG_TRACE, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
4503  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
4504  if (a.size == 0) {
4505  a.size = atom.size - total_size + 8;
4506  }
4507  a.size -= 8;
4508  if (a.size < 0)
4509  break;
4510  a.size = FFMIN(a.size, atom.size - total_size);
4511 
4512  for (i = 0; mov_default_parse_table[i].type; i++)
4513  if (mov_default_parse_table[i].type == a.type) {
4514  parse = mov_default_parse_table[i].parse;
4515  break;
4516  }
4517 
4518  // container is user data
4519  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
4520  atom.type == MKTAG('i','l','s','t')))
4522 
4523  // Supports parsing the QuickTime Metadata Keys.
4524  // https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/Metadata/Metadata.html
4525  if (!parse && c->found_hdlr_mdta &&
4526  atom.type == MKTAG('m','e','t','a') &&
4527  a.type == MKTAG('k','e','y','s')) {
4528  parse = mov_read_keys;
4529  }
4530 
4531  if (!parse) { /* skip leaf atoms data */
4532  avio_skip(pb, a.size);
4533  } else {
4534  int64_t start_pos = avio_tell(pb);
4535  int64_t left;
4536  int err = parse(c, pb, a);
4537  if (err < 0) {
4538  c->atom_depth --;
4539  return err;
4540  }
4541  if (c->found_moov && c->found_mdat &&
4542  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX || c->fragment_index_complete) ||
4543  start_pos + a.size == avio_size(pb))) {
4544  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX || c->fragment_index_complete)
4545  c->next_root_atom = start_pos + a.size;
4546  c->atom_depth --;
4547  return 0;
4548  }
4549  left = a.size - avio_tell(pb) + start_pos;
4550  if (left > 0) /* skip garbage at atom end */
4551