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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 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
219 {
220  char language[4] = { 0 };
221  char buf[200], place[100];
222  uint16_t langcode = 0;
223  double longitude, latitude, altitude;
224  const char *key = "location";
225 
226  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
227  av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
228  return AVERROR_INVALIDDATA;
229  }
230 
231  avio_skip(pb, 4); // version+flags
232  langcode = avio_rb16(pb);
233  ff_mov_lang_to_iso639(langcode, language);
234  len -= 6;
235 
236  len -= avio_get_str(pb, len, place, sizeof(place));
237  if (len < 1) {
238  av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
239  return AVERROR_INVALIDDATA;
240  }
241  avio_skip(pb, 1); // role
242  len -= 1;
243 
244  if (len < 12) {
245  av_log(c->fc, AV_LOG_ERROR, "no space for coordinates left (%d)\n", len);
246  return AVERROR_INVALIDDATA;
247  }
248  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
249  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
250  altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
251 
252  // Try to output in the same format as the ?xyz field
253  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
254  if (altitude)
255  av_strlcatf(buf, sizeof(buf), "%+f", altitude);
256  av_strlcatf(buf, sizeof(buf), "/%s", place);
257 
258  if (*language && strcmp(language, "und")) {
259  char key2[16];
260  snprintf(key2, sizeof(key2), "%s-%s", key, language);
261  av_dict_set(&c->fc->metadata, key2, buf, 0);
262  }
264  return av_dict_set(&c->fc->metadata, key, buf, 0);
265 }
266 
268 {
269  char tmp_key[5];
270  char key2[32], language[4] = {0};
271  char *str = NULL;
272  const char *key = NULL;
273  uint16_t langcode = 0;
274  uint32_t data_type = 0, str_size, str_size_alloc;
275  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
276  int raw = 0;
277  int num = 0;
278 
279  switch (atom.type) {
280  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
281  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
282  case MKTAG( 'X','M','P','_'):
283  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
284  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
285  case MKTAG( 'a','k','I','D'): key = "account_type";
287  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
288  case MKTAG( 'c','a','t','g'): key = "category"; break;
289  case MKTAG( 'c','p','i','l'): key = "compilation";
291  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
292  case MKTAG( 'd','e','s','c'): key = "description"; break;
293  case MKTAG( 'd','i','s','k'): key = "disc";
295  case MKTAG( 'e','g','i','d'): key = "episode_uid";
297  case MKTAG( 'g','n','r','e'): key = "genre";
298  parse = mov_metadata_gnre; break;
299  case MKTAG( 'h','d','v','d'): key = "hd_video";
301  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
302  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
303  case MKTAG( 'l','o','c','i'):
304  return mov_metadata_loci(c, pb, atom.size);
305  case MKTAG( 'p','c','s','t'): key = "podcast";
307  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
309  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
310  case MKTAG( 'r','t','n','g'): key = "rating";
312  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
313  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
314  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
315  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
316  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
317  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
318  case MKTAG( 's','t','i','k'): key = "media_type";
320  case MKTAG( 't','r','k','n'): key = "track";
322  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
323  case MKTAG( 't','v','e','s'): key = "episode_sort";
325  case MKTAG( 't','v','n','n'): key = "network"; break;
326  case MKTAG( 't','v','s','h'): key = "show"; break;
327  case MKTAG( 't','v','s','n'): key = "season_number";
329  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
330  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
331  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
332  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
333  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
334  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
335  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
336  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
337  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
338  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
339  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
340  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
341  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
342  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
343  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
344  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
345  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
346  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
347  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
348  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
349  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
350  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
351  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
352  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
353  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
354  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
355  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
356  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
357  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
358  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
359  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
360  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
361  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
362  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
363  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
364  }
365 retry:
366  if (c->itunes_metadata && atom.size > 8) {
367  int data_size = avio_rb32(pb);
368  int tag = avio_rl32(pb);
369  if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
370  data_type = avio_rb32(pb); // type
371  avio_rb32(pb); // unknown
372  str_size = data_size - 16;
373  atom.size -= 16;
374 
375  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
376  int ret = mov_read_covr(c, pb, data_type, str_size);
377  if (ret < 0) {
378  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
379  }
380  return ret;
381  } else if (!key && c->found_hdlr_mdta && c->meta_keys) {
382  uint32_t index = AV_RB32(&atom.type);
383  if (index < c->meta_keys_count) {
384  key = c->meta_keys[index];
385  } else {
387  "The index of 'data' is out of range: %d >= %d.\n",
388  index, c->meta_keys_count);
389  }
390  }
391  } else return 0;
392  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
393  str_size = avio_rb16(pb); // string length
394  if (str_size > atom.size) {
395  raw = 1;
396  avio_seek(pb, -2, SEEK_CUR);
397  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
398  goto retry;
399  }
400  langcode = avio_rb16(pb);
401  ff_mov_lang_to_iso639(langcode, language);
402  atom.size -= 4;
403  } else
404  str_size = atom.size;
405 
406  if (c->export_all && !key) {
407  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
408  key = tmp_key;
409  }
410 
411  if (!key)
412  return 0;
413  if (atom.size < 0 || str_size >= INT_MAX/2)
414  return AVERROR_INVALIDDATA;
415 
416  // Allocates enough space if data_type is a float32 number, otherwise
417  // worst-case requirement for output string in case of utf8 coded input
418  num = (data_type == 23);
419  str_size_alloc = (num ? 512 : (raw ? str_size : str_size * 2)) + 1;
420  str = av_mallocz(str_size_alloc);
421  if (!str)
422  return AVERROR(ENOMEM);
423 
424  if (parse)
425  parse(c, pb, str_size, key);
426  else {
427  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
428  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
429  } else if (data_type == 23 && str_size >= 4) { // BE float32
430  float val = av_int2float(avio_rb32(pb));
431  if (snprintf(str, str_size_alloc, "%f", val) >= str_size_alloc) {
432  av_log(c->fc, AV_LOG_ERROR,
433  "Failed to store the float32 number (%f) in string.\n", val);
434  av_free(str);
435  return AVERROR_INVALIDDATA;
436  }
437  } else {
438  int ret = ffio_read_size(pb, str, str_size);
439  if (ret < 0) {
440  av_free(str);
441  return ret;
442  }
443  str[str_size] = 0;
444  }
446  av_dict_set(&c->fc->metadata, key, str, 0);
447  if (*language && strcmp(language, "und")) {
448  snprintf(key2, sizeof(key2), "%s-%s", key, language);
449  av_dict_set(&c->fc->metadata, key2, str, 0);
450  }
451  if (!strcmp(key, "encoder")) {
452  int major, minor, micro;
453  if (sscanf(str, "HandBrake %d.%d.%d", &major, &minor, &micro) == 3) {
454  c->handbrake_version = 1000000*major + 1000*minor + micro;
455  }
456  }
457  }
458  av_log(c->fc, AV_LOG_TRACE, "lang \"%3s\" ", language);
459  av_log(c->fc, AV_LOG_TRACE, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
460  key, str, (char*)&atom.type, str_size_alloc, atom.size);
461 
462  av_freep(&str);
463  return 0;
464 }
465 
467 {
468  int64_t start;
469  int i, nb_chapters, str_len, version;
470  char str[256+1];
471  int ret;
472 
473  if (c->ignore_chapters)
474  return 0;
475 
476  if ((atom.size -= 5) < 0)
477  return 0;
478 
479  version = avio_r8(pb);
480  avio_rb24(pb);
481  if (version)
482  avio_rb32(pb); // ???
483  nb_chapters = avio_r8(pb);
484 
485  for (i = 0; i < nb_chapters; i++) {
486  if (atom.size < 9)
487  return 0;
488 
489  start = avio_rb64(pb);
490  str_len = avio_r8(pb);
491 
492  if ((atom.size -= 9+str_len) < 0)
493  return 0;
494 
495  ret = ffio_read_size(pb, str, str_len);
496  if (ret < 0)
497  return ret;
498  str[str_len] = 0;
499  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
500  }
501  return 0;
502 }
503 
504 #define MIN_DATA_ENTRY_BOX_SIZE 12
506 {
507  AVStream *st;
508  MOVStreamContext *sc;
509  int entries, i, j;
510 
511  if (c->fc->nb_streams < 1)
512  return 0;
513  st = c->fc->streams[c->fc->nb_streams-1];
514  sc = st->priv_data;
515 
516  avio_rb32(pb); // version + flags
517  entries = avio_rb32(pb);
518  if (!entries ||
519  entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
520  entries >= UINT_MAX / sizeof(*sc->drefs))
521  return AVERROR_INVALIDDATA;
522  sc->drefs_count = 0;
523  av_free(sc->drefs);
524  sc->drefs_count = 0;
525  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
526  if (!sc->drefs)
527  return AVERROR(ENOMEM);
528  sc->drefs_count = entries;
529 
530  for (i = 0; i < entries; i++) {
531  MOVDref *dref = &sc->drefs[i];
532  uint32_t size = avio_rb32(pb);
533  int64_t next = avio_tell(pb) + size - 4;
534 
535  if (size < 12)
536  return AVERROR_INVALIDDATA;
537 
538  dref->type = avio_rl32(pb);
539  avio_rb32(pb); // version + flags
540  av_log(c->fc, AV_LOG_TRACE, "type %.4s size %d\n", (char*)&dref->type, size);
541 
542  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
543  /* macintosh alias record */
544  uint16_t volume_len, len;
545  int16_t type;
546  int ret;
547 
548  avio_skip(pb, 10);
549 
550  volume_len = avio_r8(pb);
551  volume_len = FFMIN(volume_len, 27);
552  ret = ffio_read_size(pb, dref->volume, 27);
553  if (ret < 0)
554  return ret;
555  dref->volume[volume_len] = 0;
556  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
557 
558  avio_skip(pb, 12);
559 
560  len = avio_r8(pb);
561  len = FFMIN(len, 63);
562  ret = ffio_read_size(pb, dref->filename, 63);
563  if (ret < 0)
564  return ret;
565  dref->filename[len] = 0;
566  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
567 
568  avio_skip(pb, 16);
569 
570  /* read next level up_from_alias/down_to_target */
571  dref->nlvl_from = avio_rb16(pb);
572  dref->nlvl_to = avio_rb16(pb);
573  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
574  dref->nlvl_from, dref->nlvl_to);
575 
576  avio_skip(pb, 16);
577 
578  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
579  if(avio_feof(pb))
580  return AVERROR_EOF;
581  type = avio_rb16(pb);
582  len = avio_rb16(pb);
583  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
584  if (len&1)
585  len += 1;
586  if (type == 2) { // absolute path
587  av_free(dref->path);
588  dref->path = av_mallocz(len+1);
589  if (!dref->path)
590  return AVERROR(ENOMEM);
591 
592  ret = ffio_read_size(pb, dref->path, len);
593  if (ret < 0) {
594  av_freep(&dref->path);
595  return ret;
596  }
597  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
598  len -= volume_len;
599  memmove(dref->path, dref->path+volume_len, len);
600  dref->path[len] = 0;
601  }
602  // trim string of any ending zeros
603  for (j = len - 1; j >= 0; j--) {
604  if (dref->path[j] == 0)
605  len--;
606  else
607  break;
608  }
609  for (j = 0; j < len; j++)
610  if (dref->path[j] == ':' || dref->path[j] == 0)
611  dref->path[j] = '/';
612  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
613  } else if (type == 0) { // directory name
614  av_free(dref->dir);
615  dref->dir = av_malloc(len+1);
616  if (!dref->dir)
617  return AVERROR(ENOMEM);
618 
619  ret = ffio_read_size(pb, dref->dir, len);
620  if (ret < 0) {
621  av_freep(&dref->dir);
622  return ret;
623  }
624  dref->dir[len] = 0;
625  for (j = 0; j < len; j++)
626  if (dref->dir[j] == ':')
627  dref->dir[j] = '/';
628  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
629  } else
630  avio_skip(pb, len);
631  }
632  } else {
633  av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x08%x size %d\n",
634  dref->type, size);
635  entries--;
636  i--;
637  }
638  avio_seek(pb, next, SEEK_SET);
639  }
640  return 0;
641 }
642 
644 {
645  AVStream *st;
646  uint32_t type;
647  uint32_t av_unused ctype;
648  int64_t title_size;
649  char *title_str;
650  int ret;
651 
652  avio_r8(pb); /* version */
653  avio_rb24(pb); /* flags */
654 
655  /* component type */
656  ctype = avio_rl32(pb);
657  type = avio_rl32(pb); /* component subtype */
658 
659  av_log(c->fc, AV_LOG_TRACE, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
660  av_log(c->fc, AV_LOG_TRACE, "stype= %.4s\n", (char*)&type);
661 
662  if (c->trak_index < 0) { // meta not inside a trak
663  if (type == MKTAG('m','d','t','a')) {
664  c->found_hdlr_mdta = 1;
665  }
666  return 0;
667  }
668 
669  st = c->fc->streams[c->fc->nb_streams-1];
670 
671  if (type == MKTAG('v','i','d','e'))
673  else if (type == MKTAG('s','o','u','n'))
675  else if (type == MKTAG('m','1','a',' '))
677  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
679 
680  avio_rb32(pb); /* component manufacture */
681  avio_rb32(pb); /* component flags */
682  avio_rb32(pb); /* component flags mask */
683 
684  title_size = atom.size - 24;
685  if (title_size > 0) {
686  title_str = av_malloc(title_size + 1); /* Add null terminator */
687  if (!title_str)
688  return AVERROR(ENOMEM);
689 
690  ret = ffio_read_size(pb, title_str, title_size);
691  if (ret < 0) {
692  av_freep(&title_str);
693  return ret;
694  }
695  title_str[title_size] = 0;
696  if (title_str[0]) {
697  int off = (!c->isom && title_str[0] == title_size - 1);
698  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
699  }
700  av_freep(&title_str);
701  }
702 
703  return 0;
704 }
705 
707 {
708  AVStream *st;
709  int tag;
710 
711  if (fc->nb_streams < 1)
712  return 0;
713  st = fc->streams[fc->nb_streams-1];
714 
715  avio_rb32(pb); /* version + flags */
716  ff_mp4_read_descr(fc, pb, &tag);
717  if (tag == MP4ESDescrTag) {
719  } else
720  avio_rb16(pb); /* ID */
721 
722  ff_mp4_read_descr(fc, pb, &tag);
723  if (tag == MP4DecConfigDescrTag)
724  ff_mp4_read_dec_config_descr(fc, st, pb);
725  return 0;
726 }
727 
729 {
730  return ff_mov_read_esds(c->fc, pb);
731 }
732 
734 {
735  AVStream *st;
736  enum AVAudioServiceType *ast;
737  int ac3info, acmod, lfeon, bsmod;
738 
739  if (c->fc->nb_streams < 1)
740  return 0;
741  st = c->fc->streams[c->fc->nb_streams-1];
742 
744  sizeof(*ast));
745  if (!ast)
746  return AVERROR(ENOMEM);
747 
748  ac3info = avio_rb24(pb);
749  bsmod = (ac3info >> 14) & 0x7;
750  acmod = (ac3info >> 11) & 0x7;
751  lfeon = (ac3info >> 10) & 0x1;
752  st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
754  if (lfeon)
756  *ast = bsmod;
757  if (st->codecpar->channels > 1 && bsmod == 0x7)
759 
760 #if FF_API_LAVF_AVCTX
762  st->codec->audio_service_type = *ast;
764 #endif
765 
766  return 0;
767 }
768 
770 {
771  AVStream *st;
772  enum AVAudioServiceType *ast;
773  int eac3info, acmod, lfeon, bsmod;
774 
775  if (c->fc->nb_streams < 1)
776  return 0;
777  st = c->fc->streams[c->fc->nb_streams-1];
778 
780  sizeof(*ast));
781  if (!ast)
782  return AVERROR(ENOMEM);
783 
784  /* No need to parse fields for additional independent substreams and its
785  * associated dependent substreams since libavcodec's E-AC-3 decoder
786  * does not support them yet. */
787  avio_rb16(pb); /* data_rate and num_ind_sub */
788  eac3info = avio_rb24(pb);
789  bsmod = (eac3info >> 12) & 0x1f;
790  acmod = (eac3info >> 9) & 0x7;
791  lfeon = (eac3info >> 8) & 0x1;
793  if (lfeon)
796  *ast = bsmod;
797  if (st->codecpar->channels > 1 && bsmod == 0x7)
799 
800 #if FF_API_LAVF_AVCTX
802  st->codec->audio_service_type = *ast;
804 #endif
805 
806  return 0;
807 }
808 
810 {
811  const uint32_t ddts_size = 20;
812  AVStream *st = NULL;
813  uint8_t *buf = NULL;
814  uint32_t frame_duration_code = 0;
815  uint32_t channel_layout_code = 0;
816  GetBitContext gb;
817 
818  buf = av_malloc(ddts_size + FF_INPUT_BUFFER_PADDING_SIZE);
819  if (!buf) {
820  return AVERROR(ENOMEM);
821  }
822  if (avio_read(pb, buf, ddts_size) < ddts_size) {
823  av_free(buf);
824  return AVERROR_INVALIDDATA;
825  }
826 
827  init_get_bits(&gb, buf, 8*ddts_size);
828 
829  if (c->fc->nb_streams < 1) {
830  return 0;
831  }
832  st = c->fc->streams[c->fc->nb_streams-1];
833 
834  st->codecpar->sample_rate = get_bits_long(&gb, 32);
835  skip_bits_long(&gb, 32); /* max bitrate */
836  st->codecpar->bit_rate = get_bits_long(&gb, 32);
837  st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
838  frame_duration_code = get_bits(&gb, 2);
839  skip_bits(&gb, 30); /* various fields */
840  channel_layout_code = get_bits(&gb, 16);
841 
842  st->codecpar->frame_size =
843  (frame_duration_code == 0) ? 512 :
844  (frame_duration_code == 1) ? 1024 :
845  (frame_duration_code == 2) ? 2048 :
846  (frame_duration_code == 3) ? 4096 : 0;
847 
848  if (channel_layout_code > 0xff) {
849  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
850  }
851  st->codecpar->channel_layout =
852  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
853  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
854  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
855  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
856  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
857  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
858 
860 
861  return 0;
862 }
863 
865 {
866  AVStream *st;
867 
868  if (c->fc->nb_streams < 1)
869  return 0;
870  st = c->fc->streams[c->fc->nb_streams-1];
871 
872  if (atom.size < 16)
873  return 0;
874 
875  /* skip version and flags */
876  avio_skip(pb, 4);
877 
878  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
879 
880  return 0;
881 }
882 
884 {
885  AVStream *st;
886  int ret;
887 
888  if (c->fc->nb_streams < 1)
889  return 0;
890  st = c->fc->streams[c->fc->nb_streams-1];
891 
892  if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
893  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
894 
895  return ret;
896 }
897 
899 {
900  const int num = avio_rb32(pb);
901  const int den = avio_rb32(pb);
902  AVStream *st;
903 
904  if (c->fc->nb_streams < 1)
905  return 0;
906  st = c->fc->streams[c->fc->nb_streams-1];
907 
908  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
909  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
911  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
913  num, den);
914  } else if (den != 0) {
916  num, den, 32767);
917  }
918  return 0;
919 }
920 
921 /* this atom contains actual media data */
923 {
924  if (atom.size == 0) /* wrong one (MP4) */
925  return 0;
926  c->found_mdat=1;
927  return 0; /* now go for moov */
928 }
929 
930 #define DRM_BLOB_SIZE 56
931 
933 {
934  uint8_t intermediate_key[20];
935  uint8_t intermediate_iv[20];
936  uint8_t input[64];
937  uint8_t output[64];
938  uint8_t file_checksum[20];
939  uint8_t calculated_checksum[20];
940  struct AVSHA *sha;
941  int i;
942  int ret = 0;
943  uint8_t *activation_bytes = c->activation_bytes;
944  uint8_t *fixed_key = c->audible_fixed_key;
945 
946  c->aax_mode = 1;
947 
948  sha = av_sha_alloc();
949  if (!sha)
950  return AVERROR(ENOMEM);
951  c->aes_decrypt = av_aes_alloc();
952  if (!c->aes_decrypt) {
953  ret = AVERROR(ENOMEM);
954  goto fail;
955  }
956 
957  /* drm blob processing */
958  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
959  avio_read(pb, input, DRM_BLOB_SIZE);
960  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
961  avio_read(pb, file_checksum, 20);
962 
963  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
964  for (i = 0; i < 20; i++)
965  av_log(sha, AV_LOG_INFO, "%02x", file_checksum[i]);
966  av_log(c->fc, AV_LOG_INFO, "\n");
967 
968  /* verify activation data */
969  if (!activation_bytes) {
970  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
971  ret = 0; /* allow ffprobe to continue working on .aax files */
972  goto fail;
973  }
974  if (c->activation_bytes_size != 4) {
975  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
976  ret = AVERROR(EINVAL);
977  goto fail;
978  }
979 
980  /* verify fixed key */
981  if (c->audible_fixed_key_size != 16) {
982  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
983  ret = AVERROR(EINVAL);
984  goto fail;
985  }
986 
987  /* AAX (and AAX+) key derivation */
988  av_sha_init(sha, 160);
989  av_sha_update(sha, fixed_key, 16);
990  av_sha_update(sha, activation_bytes, 4);
991  av_sha_final(sha, intermediate_key);
992  av_sha_init(sha, 160);
993  av_sha_update(sha, fixed_key, 16);
994  av_sha_update(sha, intermediate_key, 20);
995  av_sha_update(sha, activation_bytes, 4);
996  av_sha_final(sha, intermediate_iv);
997  av_sha_init(sha, 160);
998  av_sha_update(sha, intermediate_key, 16);
999  av_sha_update(sha, intermediate_iv, 16);
1000  av_sha_final(sha, calculated_checksum);
1001  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1002  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1003  ret = AVERROR_INVALIDDATA;
1004  goto fail;
1005  }
1006  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1007  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1008  for (i = 0; i < 4; i++) {
1009  // file data (in output) is stored in big-endian mode
1010  if (activation_bytes[i] != output[3 - i]) { // critical error
1011  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1012  ret = AVERROR_INVALIDDATA;
1013  goto fail;
1014  }
1015  }
1016  memcpy(c->file_key, output + 8, 16);
1017  memcpy(input, output + 26, 16);
1018  av_sha_init(sha, 160);
1019  av_sha_update(sha, input, 16);
1020  av_sha_update(sha, c->file_key, 16);
1021  av_sha_update(sha, fixed_key, 16);
1022  av_sha_final(sha, c->file_iv);
1023 
1024 fail:
1025  av_free(sha);
1026 
1027  return ret;
1028 }
1029 
1030 // Audible AAX (and AAX+) bytestream decryption
1031 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1032 {
1033  int blocks = 0;
1034  unsigned char iv[16];
1035 
1036  memcpy(iv, c->file_iv, 16); // iv is overwritten
1037  blocks = size >> 4; // trailing bytes are not encrypted!
1038  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1039  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1040 
1041  return 0;
1042 }
1043 
1044 /* read major brand, minor version and compatible brands and store them as metadata */
1046 {
1047  uint32_t minor_ver;
1048  int comp_brand_size;
1049  char* comp_brands_str;
1050  uint8_t type[5] = {0};
1051  int ret = ffio_read_size(pb, type, 4);
1052  if (ret < 0)
1053  return ret;
1054 
1055  if (strcmp(type, "qt "))
1056  c->isom = 1;
1057  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1058  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1059  minor_ver = avio_rb32(pb); /* minor version */
1060  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1061 
1062  comp_brand_size = atom.size - 8;
1063  if (comp_brand_size < 0)
1064  return AVERROR_INVALIDDATA;
1065  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1066  if (!comp_brands_str)
1067  return AVERROR(ENOMEM);
1068 
1069  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1070  if (ret < 0) {
1071  av_freep(&comp_brands_str);
1072  return ret;
1073  }
1074  comp_brands_str[comp_brand_size] = 0;
1075  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1076  av_freep(&comp_brands_str);
1077 
1078  return 0;
1079 }
1080 
1081 /* this atom should contain all header atoms */
1083 {
1084  int ret;
1085 
1086  if (c->found_moov) {
1087  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1088  avio_skip(pb, atom.size);
1089  return 0;
1090  }
1091 
1092  if ((ret = mov_read_default(c, pb, atom)) < 0)
1093  return ret;
1094  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1095  /* so we don't parse the whole file if over a network */
1096  c->found_moov=1;
1097  return 0; /* now go for mdat */
1098 }
1099 
1101 {
1102  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1103  c->has_looked_for_mfra = 1;
1104  if (pb->seekable) {
1105  int ret;
1106  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1107  "for a mfra\n");
1108  if ((ret = mov_read_mfra(c, pb)) < 0) {
1109  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1110  "read the mfra (may be a live ismv)\n");
1111  }
1112  } else {
1113  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1114  "seekable, can not look for mfra\n");
1115  }
1116  }
1118  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1119  return mov_read_default(c, pb, atom);
1120 }
1121 
1122 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1123 {
1124  char buffer[32];
1125  if (time) {
1126  struct tm *ptm, tmbuf;
1127  time_t timet;
1128  if(time >= 2082844800)
1129  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1130  timet = time;
1131  ptm = gmtime_r(&timet, &tmbuf);
1132  if (!ptm) return;
1133  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1134  av_dict_set(metadata, "creation_time", buffer, 0);
1135  }
1136 }
1137 
1139 {
1140  AVStream *st;
1141  MOVStreamContext *sc;
1142  int version;
1143  char language[4] = {0};
1144  unsigned lang;
1145  int64_t creation_time;
1146 
1147  if (c->fc->nb_streams < 1)
1148  return 0;
1149  st = c->fc->streams[c->fc->nb_streams-1];
1150  sc = st->priv_data;
1151 
1152  if (sc->time_scale) {
1153  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1154  return AVERROR_INVALIDDATA;
1155  }
1156 
1157  version = avio_r8(pb);
1158  if (version > 1) {
1159  avpriv_request_sample(c->fc, "Version %d", version);
1160  return AVERROR_PATCHWELCOME;
1161  }
1162  avio_rb24(pb); /* flags */
1163  if (version == 1) {
1164  creation_time = avio_rb64(pb);
1165  avio_rb64(pb);
1166  } else {
1167  creation_time = avio_rb32(pb);
1168  avio_rb32(pb); /* modification time */
1169  }
1170  mov_metadata_creation_time(&st->metadata, creation_time);
1171 
1172  sc->time_scale = avio_rb32(pb);
1173  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1174 
1175  lang = avio_rb16(pb); /* language */
1176  if (ff_mov_lang_to_iso639(lang, language))
1177  av_dict_set(&st->metadata, "language", language, 0);
1178  avio_rb16(pb); /* quality */
1179 
1180  return 0;
1181 }
1182 
1184 {
1185  int64_t creation_time;
1186  int version = avio_r8(pb); /* version */
1187  avio_rb24(pb); /* flags */
1188 
1189  if (version == 1) {
1190  creation_time = avio_rb64(pb);
1191  avio_rb64(pb);
1192  } else {
1193  creation_time = avio_rb32(pb);
1194  avio_rb32(pb); /* modification time */
1195  }
1196  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1197  c->time_scale = avio_rb32(pb); /* time scale */
1198 
1199  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1200 
1201  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1202  // set the AVCodecContext duration because the duration of individual tracks
1203  // may be inaccurate
1204  if (c->time_scale > 0 && !c->trex_data)
1206  avio_rb32(pb); /* preferred scale */
1207 
1208  avio_rb16(pb); /* preferred volume */
1209 
1210  avio_skip(pb, 10); /* reserved */
1211 
1212  avio_skip(pb, 36); /* display matrix */
1213 
1214  avio_rb32(pb); /* preview time */
1215  avio_rb32(pb); /* preview duration */
1216  avio_rb32(pb); /* poster time */
1217  avio_rb32(pb); /* selection time */
1218  avio_rb32(pb); /* selection duration */
1219  avio_rb32(pb); /* current time */
1220  avio_rb32(pb); /* next track ID */
1221 
1222  return 0;
1223 }
1224 
1226 {
1227  AVStream *st;
1228  int little_endian;
1229 
1230  if (c->fc->nb_streams < 1)
1231  return 0;
1232  st = c->fc->streams[c->fc->nb_streams-1];
1233 
1234  little_endian = avio_rb16(pb) & 0xFF;
1235  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1236  if (little_endian == 1) {
1237  switch (st->codecpar->codec_id) {
1238  case AV_CODEC_ID_PCM_S24BE:
1240  break;
1241  case AV_CODEC_ID_PCM_S32BE:
1243  break;
1244  case AV_CODEC_ID_PCM_F32BE:
1246  break;
1247  case AV_CODEC_ID_PCM_F64BE:
1249  break;
1250  default:
1251  break;
1252  }
1253  }
1254  return 0;
1255 }
1256 
1258 {
1259  AVStream *st;
1260  char color_parameter_type[5] = { 0 };
1261  uint16_t color_primaries, color_trc, color_matrix;
1262  int ret;
1263 
1264  if (c->fc->nb_streams < 1)
1265  return 0;
1266  st = c->fc->streams[c->fc->nb_streams - 1];
1267 
1268  ret = ffio_read_size(pb, color_parameter_type, 4);
1269  if (ret < 0)
1270  return ret;
1271  if (strncmp(color_parameter_type, "nclx", 4) &&
1272  strncmp(color_parameter_type, "nclc", 4)) {
1273  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1274  color_parameter_type);
1275  return 0;
1276  }
1277 
1278  color_primaries = avio_rb16(pb);
1279  color_trc = avio_rb16(pb);
1280  color_matrix = avio_rb16(pb);
1281 
1282  av_log(c->fc, AV_LOG_TRACE,
1283  "%s: pri %d trc %d matrix %d",
1284  color_parameter_type, color_primaries, color_trc, color_matrix);
1285 
1286  if (!strncmp(color_parameter_type, "nclx", 4)) {
1287  uint8_t color_range = avio_r8(pb) >> 7;
1288  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1289  if (color_range)
1291  else
1293  /* 14496-12 references JPEG XR specs (rather than the more complete
1294  * 23001-8) so some adjusting is required */
1295  if (color_primaries >= AVCOL_PRI_FILM)
1296  color_primaries = AVCOL_PRI_UNSPECIFIED;
1297  if ((color_trc >= AVCOL_TRC_LINEAR &&
1298  color_trc <= AVCOL_TRC_LOG_SQRT) ||
1299  color_trc >= AVCOL_TRC_BT2020_10)
1300  color_trc = AVCOL_TRC_UNSPECIFIED;
1301  if (color_matrix >= AVCOL_SPC_BT2020_NCL)
1302  color_matrix = AVCOL_SPC_UNSPECIFIED;
1304  st->codecpar->color_trc = color_trc;
1305  st->codecpar->color_space = color_matrix;
1306  } else if (!strncmp(color_parameter_type, "nclc", 4)) {
1307  /* color primaries, Table 4-4 */
1308  switch (color_primaries) {
1309  case 1: st->codecpar->color_primaries = AVCOL_PRI_BT709; break;
1310  case 5: st->codecpar->color_primaries = AVCOL_PRI_SMPTE170M; break;
1311  case 6: st->codecpar->color_primaries = AVCOL_PRI_SMPTE240M; break;
1312  }
1313  /* color transfer, Table 4-5 */
1314  switch (color_trc) {
1315  case 1: st->codecpar->color_trc = AVCOL_TRC_BT709; break;
1316  case 7: st->codecpar->color_trc = AVCOL_TRC_SMPTE240M; break;
1317  }
1318  /* color matrix, Table 4-6 */
1319  switch (color_matrix) {
1320  case 1: st->codecpar->color_space = AVCOL_SPC_BT709; break;
1321  case 6: st->codecpar->color_space = AVCOL_SPC_BT470BG; break;
1322  case 7: st->codecpar->color_space = AVCOL_SPC_SMPTE240M; break;
1323  }
1324  }
1325  av_log(c->fc, AV_LOG_TRACE, "\n");
1326 
1327  return 0;
1328 }
1329 
1331 {
1332  AVStream *st;
1333  unsigned mov_field_order;
1334  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1335 
1336  if (c->fc->nb_streams < 1) // will happen with jp2 files
1337  return 0;
1338  st = c->fc->streams[c->fc->nb_streams-1];
1339  if (atom.size < 2)
1340  return AVERROR_INVALIDDATA;
1341  mov_field_order = avio_rb16(pb);
1342  if ((mov_field_order & 0xFF00) == 0x0100)
1343  decoded_field_order = AV_FIELD_PROGRESSIVE;
1344  else if ((mov_field_order & 0xFF00) == 0x0200) {
1345  switch (mov_field_order & 0xFF) {
1346  case 0x01: decoded_field_order = AV_FIELD_TT;
1347  break;
1348  case 0x06: decoded_field_order = AV_FIELD_BB;
1349  break;
1350  case 0x09: decoded_field_order = AV_FIELD_TB;
1351  break;
1352  case 0x0E: decoded_field_order = AV_FIELD_BT;
1353  break;
1354  }
1355  }
1356  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1357  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1358  }
1359  st->codecpar->field_order = decoded_field_order;
1360 
1361  return 0;
1362 }
1363 
1365 {
1366  int err = 0;
1367  uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1368  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1369  return AVERROR_INVALIDDATA;
1370  if ((err = av_reallocp(&par->extradata, size)) < 0) {
1371  par->extradata_size = 0;
1372  return err;
1373  }
1375  return 0;
1376 }
1377 
1378 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1380  AVCodecParameters *par, uint8_t *buf)
1381 {
1382  int64_t result = atom.size;
1383  int err;
1384 
1385  AV_WB32(buf , atom.size + 8);
1386  AV_WL32(buf + 4, atom.type);
1387  err = ffio_read_size(pb, buf + 8, atom.size);
1388  if (err < 0) {
1389  par->extradata_size -= atom.size;
1390  return err;
1391  } else if (err < atom.size) {
1392  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1393  par->extradata_size -= atom.size - err;
1394  result = err;
1395  }
1396  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1397  return result;
1398 }
1399 
1400 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1402  enum AVCodecID codec_id)
1403 {
1404  AVStream *st;
1405  uint64_t original_size;
1406  int err;
1407 
1408  if (c->fc->nb_streams < 1) // will happen with jp2 files
1409  return 0;
1410  st = c->fc->streams[c->fc->nb_streams-1];
1411 
1412  if (st->codecpar->codec_id != codec_id)
1413  return 0; /* unexpected codec_id - don't mess with extradata */
1414 
1415  original_size = st->codecpar->extradata_size;
1416  err = mov_realloc_extradata(st->codecpar, atom);
1417  if (err)
1418  return err;
1419 
1420  err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1421  if (err < 0)
1422  return err;
1423  return 0; // Note: this is the original behavior to ignore truncation.
1424 }
1425 
1426 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1428 {
1429  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1430 }
1431 
1433 {
1434  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1435 }
1436 
1438 {
1439  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1440 }
1441 
1443 {
1444  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1445 }
1446 
1448 {
1449  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1450  if(ret == 0)
1451  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1452  return ret;
1453 }
1454 
1456 {
1457  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1458 
1459  if (!ret && c->fc->nb_streams >= 1) {
1460  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1461  if (par->extradata_size >= 40) {
1462  par->height = AV_RB16(&par->extradata[36]);
1463  par->width = AV_RB16(&par->extradata[38]);
1464  }
1465  }
1466  return ret;
1467 }
1468 
1470 {
1471  if (c->fc->nb_streams >= 1) {
1472  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1473  if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1474  par->codec_id == AV_CODEC_ID_H264 &&
1475  atom.size > 11) {
1476  avio_skip(pb, 10);
1477  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1478  if (avio_rb16(pb) == 0xd4d)
1479  par->width = 1440;
1480  return 0;
1481  } else if (par->codec_tag == MKTAG('A', 'V', 'd', '1') &&
1482  atom.size >= 24) {
1483  int num, den;
1484  avio_skip(pb, 12);
1485  num = avio_rb32(pb);
1486  den = avio_rb32(pb);
1487  if (num <= 0 || den <= 0)
1488  return 0;
1489  switch (avio_rb32(pb)) {
1490  case 2:
1491  if (den >= INT_MAX / 2)
1492  return 0;
1493  den *= 2;
1494  case 1:
1495  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1496  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1497  default:
1498  return 0;
1499  }
1500  }
1501  }
1502 
1503  return mov_read_avid(c, pb, atom);
1504 }
1505 
1507 {
1508  int ret = 0;
1509  int length = 0;
1510  uint64_t original_size;
1511  if (c->fc->nb_streams >= 1) {
1512  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1513  if (par->codec_id == AV_CODEC_ID_H264)
1514  return 0;
1515  if (atom.size == 16) {
1516  original_size = par->extradata_size;
1517  ret = mov_realloc_extradata(par, atom);
1518  if (!ret) {
1519  length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1520  if (length == atom.size) {
1521  const uint8_t range_value = par->extradata[original_size + 19];
1522  switch (range_value) {
1523  case 1:
1525  break;
1526  case 2:
1528  break;
1529  default:
1530  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1531  break;
1532  }
1533  ff_dlog(c, "color_range: %d\n", par->color_range);
1534  } else {
1535  /* For some reason the whole atom was not added to the extradata */
1536  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1537  }
1538  } else {
1539  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1540  }
1541  } else {
1542  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1543  }
1544  }
1545 
1546  return ret;
1547 }
1548 
1550 {
1551  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1552 }
1553 
1555 {
1556  AVStream *st;
1557  int ret;
1558 
1559  if (c->fc->nb_streams < 1)
1560  return 0;
1561  st = c->fc->streams[c->fc->nb_streams-1];
1562 
1563  if ((uint64_t)atom.size > (1<<30))
1564  return AVERROR_INVALIDDATA;
1565 
1566  if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1569  // pass all frma atom to codec, needed at least for QDMC and QDM2
1570  av_freep(&st->codecpar->extradata);
1571  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1572  if (ret < 0)
1573  return ret;
1574  } else if (atom.size > 8) { /* to read frma, esds atoms */
1575  if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1576  uint64_t buffer;
1577  ret = ffio_ensure_seekback(pb, 8);
1578  if (ret < 0)
1579  return ret;
1580  buffer = avio_rb64(pb);
1581  atom.size -= 8;
1582  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1583  && buffer >> 32 <= atom.size
1584  && buffer >> 32 >= 8) {
1585  avio_skip(pb, -8);
1586  atom.size += 8;
1587  } else if (!st->codecpar->extradata_size) {
1588 #define ALAC_EXTRADATA_SIZE 36
1590  if (!st->codecpar->extradata)
1591  return AVERROR(ENOMEM);
1594  AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1595  AV_WB64(st->codecpar->extradata + 12, buffer);
1596  avio_read(pb, st->codecpar->extradata + 20, 16);
1597  avio_skip(pb, atom.size - 24);
1598  return 0;
1599  }
1600  }
1601  if ((ret = mov_read_default(c, pb, atom)) < 0)
1602  return ret;
1603  } else
1604  avio_skip(pb, atom.size);
1605  return 0;
1606 }
1607 
1608 /**
1609  * This function reads atom content and puts data in extradata without tag
1610  * nor size unlike mov_read_extradata.
1611  */
1613 {
1614  AVStream *st;
1615  int ret;
1616 
1617  if (c->fc->nb_streams < 1)
1618  return 0;
1619  st = c->fc->streams[c->fc->nb_streams-1];
1620 
1621  if ((uint64_t)atom.size > (1<<30))
1622  return AVERROR_INVALIDDATA;
1623 
1624  if (atom.size >= 10) {
1625  // Broken files created by legacy versions of libavformat will
1626  // wrap a whole fiel atom inside of a glbl atom.
1627  unsigned size = avio_rb32(pb);
1628  unsigned type = avio_rl32(pb);
1629  avio_seek(pb, -8, SEEK_CUR);
1630  if (type == MKTAG('f','i','e','l') && size == atom.size)
1631  return mov_read_default(c, pb, atom);
1632  }
1633  if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1634  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1635  return 0;
1636  }
1637  av_freep(&st->codecpar->extradata);
1638  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1639  if (ret < 0)
1640  return ret;
1641 
1642  return 0;
1643 }
1644 
1646 {
1647  AVStream *st;
1648  uint8_t profile_level;
1649  int ret;
1650 
1651  if (c->fc->nb_streams < 1)
1652  return 0;
1653  st = c->fc->streams[c->fc->nb_streams-1];
1654 
1655  if (atom.size >= (1<<28) || atom.size < 7)
1656  return AVERROR_INVALIDDATA;
1657 
1658  profile_level = avio_r8(pb);
1659  if ((profile_level & 0xf0) != 0xc0)
1660  return 0;
1661 
1662  avio_seek(pb, 6, SEEK_CUR);
1663  av_freep(&st->codecpar->extradata);
1664  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1665  if (ret < 0)
1666  return ret;
1667 
1668  return 0;
1669 }
1670 
1671 /**
1672  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1673  * but can have extradata appended at the end after the 40 bytes belonging
1674  * to the struct.
1675  */
1677 {
1678  AVStream *st;
1679  int ret;
1680 
1681  if (c->fc->nb_streams < 1)
1682  return 0;
1683  if (atom.size <= 40)
1684  return 0;
1685  st = c->fc->streams[c->fc->nb_streams-1];
1686 
1687  if ((uint64_t)atom.size > (1<<30))
1688  return AVERROR_INVALIDDATA;
1689 
1690  avio_skip(pb, 40);
1691  av_freep(&st->codecpar->extradata);
1692  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1693  if (ret < 0)
1694  return ret;
1695 
1696  return 0;
1697 }
1698 
1700 {
1701  AVStream *st;
1702  MOVStreamContext *sc;
1703  unsigned int i, entries;
1704 
1705  if (c->fc->nb_streams < 1)
1706  return 0;
1707  st = c->fc->streams[c->fc->nb_streams-1];
1708  sc = st->priv_data;
1709 
1710  avio_r8(pb); /* version */
1711  avio_rb24(pb); /* flags */
1712 
1713  entries = avio_rb32(pb);
1714 
1715  if (!entries)
1716  return 0;
1717 
1718  if (sc->chunk_offsets)
1719  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1720  av_free(sc->chunk_offsets);
1721  sc->chunk_count = 0;
1722  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1723  if (!sc->chunk_offsets)
1724  return AVERROR(ENOMEM);
1725  sc->chunk_count = entries;
1726 
1727  if (atom.type == MKTAG('s','t','c','o'))
1728  for (i = 0; i < entries && !pb->eof_reached; i++)
1729  sc->chunk_offsets[i] = avio_rb32(pb);
1730  else if (atom.type == MKTAG('c','o','6','4'))
1731  for (i = 0; i < entries && !pb->eof_reached; i++)
1732  sc->chunk_offsets[i] = avio_rb64(pb);
1733  else
1734  return AVERROR_INVALIDDATA;
1735 
1736  sc->chunk_count = i;
1737 
1738  if (pb->eof_reached)
1739  return AVERROR_EOF;
1740 
1741  return 0;
1742 }
1743 
1744 /**
1745  * Compute codec id for 'lpcm' tag.
1746  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1747  */
1749 {
1750  /* lpcm flags:
1751  * 0x1 = float
1752  * 0x2 = big-endian
1753  * 0x4 = signed
1754  */
1755  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1756 }
1757 
1758 static int mov_codec_id(AVStream *st, uint32_t format)
1759 {
1760  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1761 
1762  if (id <= 0 &&
1763  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1764  (format & 0xFFFF) == 'T' + ('S' << 8)))
1765  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1766 
1767  if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1769  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1770  /* skip old asf mpeg4 tag */
1771  format && format != MKTAG('m','p','4','s')) {
1773  if (id <= 0)
1774  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1775  if (id > 0)
1777  else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
1779  st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
1781  if (id > 0)
1783  }
1784  }
1785 
1786  st->codecpar->codec_tag = format;
1787 
1788  return id;
1789 }
1790 
1792  AVStream *st, MOVStreamContext *sc)
1793 {
1794  uint8_t codec_name[32];
1795  int64_t stsd_start;
1796  unsigned int len;
1797 
1798  /* The first 16 bytes of the video sample description are already
1799  * read in ff_mov_read_stsd_entries() */
1800  stsd_start = avio_tell(pb) - 16;
1801 
1802  avio_rb16(pb); /* version */
1803  avio_rb16(pb); /* revision level */
1804  avio_rb32(pb); /* vendor */
1805  avio_rb32(pb); /* temporal quality */
1806  avio_rb32(pb); /* spatial quality */
1807 
1808  st->codecpar->width = avio_rb16(pb); /* width */
1809  st->codecpar->height = avio_rb16(pb); /* height */
1810 
1811  avio_rb32(pb); /* horiz resolution */
1812  avio_rb32(pb); /* vert resolution */
1813  avio_rb32(pb); /* data size, always 0 */
1814  avio_rb16(pb); /* frames per samples */
1815 
1816  len = avio_r8(pb); /* codec name, pascal string */
1817  if (len > 31)
1818  len = 31;
1819  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1820  if (len < 31)
1821  avio_skip(pb, 31 - len);
1822 
1823  if (codec_name[0])
1824  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1825 
1826  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1827  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1828  st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1829  st->codecpar->width &= ~1;
1830  st->codecpar->height &= ~1;
1831  }
1832  /* Flash Media Server uses tag H263 with Sorenson Spark */
1833  if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1834  !memcmp(codec_name, "Sorenson H263", 13))
1836 
1837  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1838 
1839  avio_seek(pb, stsd_start, SEEK_SET);
1840 
1841  if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
1842  st->codecpar->bits_per_coded_sample &= 0x1F;
1843  sc->has_palette = 1;
1844  }
1845 }
1846 
1848  AVStream *st, MOVStreamContext *sc)
1849 {
1850  int bits_per_sample, flags;
1851  uint16_t version = avio_rb16(pb);
1852  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1853 
1854  avio_rb16(pb); /* revision level */
1855  avio_rb32(pb); /* vendor */
1856 
1857  st->codecpar->channels = avio_rb16(pb); /* channel count */
1858  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1859  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1860 
1861  sc->audio_cid = avio_rb16(pb);
1862  avio_rb16(pb); /* packet size = 0 */
1863 
1864  st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1865 
1866  // Read QT version 1 fields. In version 0 these do not exist.
1867  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1868  if (!c->isom ||
1869  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1870 
1871  if (version == 1) {
1872  sc->samples_per_frame = avio_rb32(pb);
1873  avio_rb32(pb); /* bytes per packet */
1874  sc->bytes_per_frame = avio_rb32(pb);
1875  avio_rb32(pb); /* bytes per sample */
1876  } else if (version == 2) {
1877  avio_rb32(pb); /* sizeof struct only */
1879  st->codecpar->channels = avio_rb32(pb);
1880  avio_rb32(pb); /* always 0x7F000000 */
1882 
1883  flags = avio_rb32(pb); /* lpcm format specific flag */
1884  sc->bytes_per_frame = avio_rb32(pb);
1885  sc->samples_per_frame = avio_rb32(pb);
1886  if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1887  st->codecpar->codec_id =
1889  flags);
1890  }
1891  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1892  /* can't correctly handle variable sized packet as audio unit */
1893  switch (st->codecpar->codec_id) {
1894  case AV_CODEC_ID_MP2:
1895  case AV_CODEC_ID_MP3:
1897  break;
1898  }
1899  }
1900  }
1901 
1902  if (sc->format == 0) {
1903  if (st->codecpar->bits_per_coded_sample == 8)
1904  st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1905  else if (st->codecpar->bits_per_coded_sample == 16)
1906  st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1907  }
1908 
1909  switch (st->codecpar->codec_id) {
1910  case AV_CODEC_ID_PCM_S8:
1911  case AV_CODEC_ID_PCM_U8:
1912  if (st->codecpar->bits_per_coded_sample == 16)
1914  break;
1915  case AV_CODEC_ID_PCM_S16LE:
1916  case AV_CODEC_ID_PCM_S16BE:
1917  if (st->codecpar->bits_per_coded_sample == 8)
1919  else if (st->codecpar->bits_per_coded_sample == 24)
1920  st->codecpar->codec_id =
1923  else if (st->codecpar->bits_per_coded_sample == 32)
1924  st->codecpar->codec_id =
1927  break;
1928  /* set values for old format before stsd version 1 appeared */
1929  case AV_CODEC_ID_MACE3:
1930  sc->samples_per_frame = 6;
1931  sc->bytes_per_frame = 2 * st->codecpar->channels;
1932  break;
1933  case AV_CODEC_ID_MACE6:
1934  sc->samples_per_frame = 6;
1935  sc->bytes_per_frame = 1 * st->codecpar->channels;
1936  break;
1938  sc->samples_per_frame = 64;
1939  sc->bytes_per_frame = 34 * st->codecpar->channels;
1940  break;
1941  case AV_CODEC_ID_GSM:
1942  sc->samples_per_frame = 160;
1943  sc->bytes_per_frame = 33;
1944  break;
1945  default:
1946  break;
1947  }
1948 
1949  bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
1950  if (bits_per_sample) {
1951  st->codecpar->bits_per_coded_sample = bits_per_sample;
1952  sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
1953  }
1954 }
1955 
1957  AVStream *st, MOVStreamContext *sc,
1958  int64_t size)
1959 {
1960  // ttxt stsd contains display flags, justification, background
1961  // color, fonts, and default styles, so fake an atom to read it
1962  MOVAtom fake_atom = { .size = size };
1963  // mp4s contains a regular esds atom
1964  if (st->codecpar->codec_tag != AV_RL32("mp4s"))
1965  mov_read_glbl(c, pb, fake_atom);
1966  st->codecpar->width = sc->width;
1967  st->codecpar->height = sc->height;
1968 }
1969 
1970 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1971 {
1972  uint8_t r, g, b;
1973  int y, cb, cr;
1974 
1975  y = (ycbcr >> 16) & 0xFF;
1976  cr = (ycbcr >> 8) & 0xFF;
1977  cb = ycbcr & 0xFF;
1978 
1979  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
1980  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
1981  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
1982 
1983  return (r << 16) | (g << 8) | b;
1984 }
1985 
1987 {
1988  char buf[256] = {0};
1989  uint8_t *src = st->codecpar->extradata;
1990  int i;
1991 
1992  if (st->codecpar->extradata_size != 64)
1993  return 0;
1994 
1995  if (st->codecpar->width > 0 && st->codecpar->height > 0)
1996  snprintf(buf, sizeof(buf), "size: %dx%d\n",
1997  st->codecpar->width, st->codecpar->height);
1998  av_strlcat(buf, "palette: ", sizeof(buf));
1999 
2000  for (i = 0; i < 16; i++) {
2001  uint32_t yuv = AV_RB32(src + i * 4);
2002  uint32_t rgba = yuv_to_rgba(yuv);
2003 
2004  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2005  }
2006 
2007  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2008  return 0;
2009 
2010  av_freep(&st->codecpar->extradata);
2011  st->codecpar->extradata_size = 0;
2013  if (!st->codecpar->extradata)
2014  return AVERROR(ENOMEM);
2015  st->codecpar->extradata_size = strlen(buf);
2016  memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2017 
2018  return 0;
2019 }
2020 
2022  AVStream *st, MOVStreamContext *sc,
2023  int64_t size)
2024 {
2025  int ret;
2026 
2027  if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2028  if ((int)size != size)
2029  return AVERROR(ENOMEM);
2030 
2031  ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2032  if (ret < 0)
2033  return ret;
2034  if (size > 16) {
2035  MOVStreamContext *tmcd_ctx = st->priv_data;
2036  int val;
2037  val = AV_RB32(st->codecpar->extradata + 4);
2038  tmcd_ctx->tmcd_flags = val;
2039  st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2040  st->avg_frame_rate.den = 1;
2041 #if FF_API_LAVF_AVCTX
2043  st->codec->time_base = av_inv_q(st->avg_frame_rate);
2045 #endif
2046  /* adjust for per frame dur in counter mode */
2047  if (tmcd_ctx->tmcd_flags & 0x0008) {
2048  int timescale = AV_RB32(st->codecpar->extradata + 8);
2049  int framedur = AV_RB32(st->codecpar->extradata + 12);
2050  st->avg_frame_rate.num *= timescale;
2051  st->avg_frame_rate.den *= framedur;
2052 #if FF_API_LAVF_AVCTX
2054  st->codec->time_base.den *= timescale;
2055  st->codec->time_base.num *= framedur;
2057 #endif
2058  }
2059  if (size > 30) {
2060  uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2061  uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2062  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2063  uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2064  if (str_size > 0 && size >= (int)str_size + 26) {
2065  char *reel_name = av_malloc(str_size + 1);
2066  if (!reel_name)
2067  return AVERROR(ENOMEM);
2068  memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2069  reel_name[str_size] = 0; /* Add null terminator */
2070  /* don't add reel_name if emtpy string */
2071  if (*reel_name == 0) {
2072  av_free(reel_name);
2073  } else {
2074  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2075  }
2076  }
2077  }
2078  }
2079  }
2080  } else {
2081  /* other codec type, just skip (rtp, mp4s ...) */
2082  avio_skip(pb, size);
2083  }
2084  return 0;
2085 }
2086 
2088  AVStream *st, MOVStreamContext *sc)
2089 {
2090  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2091  !st->codecpar->sample_rate && sc->time_scale > 1)
2092  st->codecpar->sample_rate = sc->time_scale;
2093 
2094  /* special codec parameters handling */
2095  switch (st->codecpar->codec_id) {
2096 #if CONFIG_DV_DEMUXER
2097  case AV_CODEC_ID_DVAUDIO:
2099  if (!c->dv_fctx) {
2100  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2101  return AVERROR(ENOMEM);
2102  }
2104  if (!c->dv_demux) {
2105  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2106  return AVERROR(ENOMEM);
2107  }
2108  sc->dv_audio_container = 1;
2110  break;
2111 #endif
2112  /* no ifdef since parameters are always those */
2113  case AV_CODEC_ID_QCELP:
2114  st->codecpar->channels = 1;
2115  // force sample rate for qcelp when not stored in mov
2116  if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2117  st->codecpar->sample_rate = 8000;
2118  // FIXME: Why is the following needed for some files?
2119  sc->samples_per_frame = 160;
2120  if (!sc->bytes_per_frame)
2121  sc->bytes_per_frame = 35;
2122  break;
2123  case AV_CODEC_ID_AMR_NB:
2124  st->codecpar->channels = 1;
2125  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2126  st->codecpar->sample_rate = 8000;
2127  break;
2128  case AV_CODEC_ID_AMR_WB:
2129  st->codecpar->channels = 1;
2130  st->codecpar->sample_rate = 16000;
2131  break;
2132  case AV_CODEC_ID_MP2:
2133  case AV_CODEC_ID_MP3:
2134  /* force type after stsd for m1a hdlr */
2136  break;
2137  case AV_CODEC_ID_GSM:
2138  case AV_CODEC_ID_ADPCM_MS:
2140  case AV_CODEC_ID_ILBC:
2141  case AV_CODEC_ID_MACE3:
2142  case AV_CODEC_ID_MACE6:
2143  case AV_CODEC_ID_QDM2:
2145  break;
2146  case AV_CODEC_ID_ALAC:
2147  if (st->codecpar->extradata_size == 36) {
2148  st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2149  st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2150  }
2151  break;
2152  case AV_CODEC_ID_AC3:
2153  case AV_CODEC_ID_EAC3:
2155  case AV_CODEC_ID_VC1:
2157  break;
2158  default:
2159  break;
2160  }
2161  return 0;
2162 }
2163 
2165  int codec_tag, int format,
2166  int64_t size)
2167 {
2168  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2169 
2170  if (codec_tag &&
2171  (codec_tag != format &&
2172  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2173  : codec_tag != MKTAG('j','p','e','g')))) {
2174  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2175  * export it as a separate AVStream but this needs a few changes
2176  * in the MOV demuxer, patch welcome. */
2177 
2178  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2179  avio_skip(pb, size);
2180  return 1;
2181  }
2182  if ( codec_tag == AV_RL32("avc1") ||
2183  codec_tag == AV_RL32("hvc1") ||
2184  codec_tag == AV_RL32("hev1")
2185  )
2186  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
2187 
2188  return 0;
2189 }
2190 
2192 {
2193  AVStream *st;
2194  MOVStreamContext *sc;
2195  int pseudo_stream_id;
2196 
2197  if (c->fc->nb_streams < 1)
2198  return 0;
2199  st = c->fc->streams[c->fc->nb_streams-1];
2200  sc = st->priv_data;
2201 
2202  for (pseudo_stream_id = 0;
2203  pseudo_stream_id < entries && !pb->eof_reached;
2204  pseudo_stream_id++) {
2205  //Parsing Sample description table
2206  enum AVCodecID id;
2207  int ret, dref_id = 1;
2208  MOVAtom a = { AV_RL32("stsd") };
2209  int64_t start_pos = avio_tell(pb);
2210  int64_t size = avio_rb32(pb); /* size */
2211  uint32_t format = avio_rl32(pb); /* data format */
2212 
2213  if (size >= 16) {
2214  avio_rb32(pb); /* reserved */
2215  avio_rb16(pb); /* reserved */
2216  dref_id = avio_rb16(pb);
2217  } else if (size <= 7) {
2218  av_log(c->fc, AV_LOG_ERROR,
2219  "invalid size %"PRId64" in stsd\n", size);
2220  return AVERROR_INVALIDDATA;
2221  }
2222 
2223  if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2224  size - (avio_tell(pb) - start_pos)))
2225  continue;
2226 
2227  sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2228  sc->dref_id= dref_id;
2229  sc->format = format;
2230 
2231  id = mov_codec_id(st, format);
2232 
2233  av_log(c->fc, AV_LOG_TRACE,
2234  "size=%"PRId64" 4CC= %c%c%c%c/0x%08x codec_type=%d\n", size,
2235  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
2236  (format >> 24) & 0xff, format, st->codecpar->codec_type);
2237 
2239  st->codecpar->codec_id = id;
2240  mov_parse_stsd_video(c, pb, st, sc);
2241  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2242  st->codecpar->codec_id = id;
2243  mov_parse_stsd_audio(c, pb, st, sc);
2244  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2245  st->codecpar->codec_id = id;
2246  mov_parse_stsd_subtitle(c, pb, st, sc,
2247  size - (avio_tell(pb) - start_pos));
2248  } else {
2249  ret = mov_parse_stsd_data(c, pb, st, sc,
2250  size - (avio_tell(pb) - start_pos));
2251  if (ret < 0)
2252  return ret;
2253  }
2254  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2255  a.size = size - (avio_tell(pb) - start_pos);
2256  if (a.size > 8) {
2257  if ((ret = mov_read_default(c, pb, a)) < 0)
2258  return ret;
2259  } else if (a.size > 0)
2260  avio_skip(pb, a.size);
2261  }
2262 
2263  if (pb->eof_reached)
2264  return AVERROR_EOF;
2265 
2266  return mov_finalize_stsd_codec(c, pb, st, sc);
2267 }
2268 
2270 {
2271  int entries;
2272 
2273  avio_r8(pb); /* version */
2274  avio_rb24(pb); /* flags */
2275  entries = avio_rb32(pb);
2276 
2277  return ff_mov_read_stsd_entries(c, pb, entries);
2278 }
2279 
2281 {
2282  AVStream *st;
2283  MOVStreamContext *sc;
2284  unsigned int i, entries;
2285 
2286  if (c->fc->nb_streams < 1)
2287  return 0;
2288  st = c->fc->streams[c->fc->nb_streams-1];
2289  sc = st->priv_data;
2290 
2291  avio_r8(pb); /* version */
2292  avio_rb24(pb); /* flags */
2293 
2294  entries = avio_rb32(pb);
2295 
2296  av_log(c->fc, AV_LOG_TRACE, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
2297 
2298  if (!entries)
2299  return 0;
2300  if (sc->stsc_data)
2301  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2302  av_free(sc->stsc_data);
2303  sc->stsc_count = 0;
2304  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2305  if (!sc->stsc_data)
2306  return AVERROR(ENOMEM);
2307 
2308  for (i = 0; i < entries && !pb->eof_reached; i++) {
2309  sc->stsc_data[i].first = avio_rb32(pb);
2310  sc->stsc_data[i].count = avio_rb32(pb);
2311  sc->stsc_data[i].id = avio_rb32(pb);
2312  }
2313 
2314  sc->stsc_count = i;
2315 
2316  if (pb->eof_reached)
2317  return AVERROR_EOF;
2318 
2319  return 0;
2320 }
2321 
2323 {
2324  AVStream *st;
2325  MOVStreamContext *sc;
2326  unsigned i, entries;
2327 
2328  if (c->fc->nb_streams < 1)
2329  return 0;
2330  st = c->fc->streams[c->fc->nb_streams-1];
2331  sc = st->priv_data;
2332 
2333  avio_rb32(pb); // version + flags
2334 
2335  entries = avio_rb32(pb);
2336  if (sc->stps_data)
2337  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2338  av_free(sc->stps_data);
2339  sc->stps_count = 0;
2340  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2341  if (!sc->stps_data)
2342  return AVERROR(ENOMEM);
2343 
2344  for (i = 0; i < entries && !pb->eof_reached; i++) {
2345  sc->stps_data[i] = avio_rb32(pb);
2346  //av_log(c->fc, AV_LOG_TRACE, "stps %d\n", sc->stps_data[i]);
2347  }
2348 
2349  sc->stps_count = i;
2350 
2351  if (pb->eof_reached)
2352  return AVERROR_EOF;
2353 
2354  return 0;
2355 }
2356 
2358 {
2359  AVStream *st;
2360  MOVStreamContext *sc;
2361  unsigned int i, entries;
2362 
2363  if (c->fc->nb_streams < 1)
2364  return 0;
2365  st = c->fc->streams[c->fc->nb_streams-1];
2366  sc = st->priv_data;
2367 
2368  avio_r8(pb); /* version */
2369  avio_rb24(pb); /* flags */
2370 
2371  entries = avio_rb32(pb);
2372 
2373  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %d\n", entries);
2374 
2375  if (!entries)
2376  {
2377  sc->keyframe_absent = 1;
2378  if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2380  return 0;
2381  }
2382  if (sc->keyframes)
2383  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2384  if (entries >= UINT_MAX / sizeof(int))
2385  return AVERROR_INVALIDDATA;
2386  av_freep(&sc->keyframes);
2387  sc->keyframe_count = 0;
2388  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2389  if (!sc->keyframes)
2390  return AVERROR(ENOMEM);
2391 
2392  for (i = 0; i < entries && !pb->eof_reached; i++) {
2393  sc->keyframes[i] = avio_rb32(pb);
2394  //av_log(c->fc, AV_LOG_TRACE, "keyframes[]=%d\n", sc->keyframes[i]);
2395  }
2396 
2397  sc->keyframe_count = i;
2398 
2399  if (pb->eof_reached)
2400  return AVERROR_EOF;
2401 
2402  return 0;
2403 }
2404 
2406 {
2407  AVStream *st;
2408  MOVStreamContext *sc;
2409  unsigned int i, entries, sample_size, field_size, num_bytes;
2410  GetBitContext gb;
2411  unsigned char* buf;
2412  int ret;
2413 
2414  if (c->fc->nb_streams < 1)
2415  return 0;
2416  st = c->fc->streams[c->fc->nb_streams-1];
2417  sc = st->priv_data;
2418 
2419  avio_r8(pb); /* version */
2420  avio_rb24(pb); /* flags */
2421 
2422  if (atom.type == MKTAG('s','t','s','z')) {
2423  sample_size = avio_rb32(pb);
2424  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2425  sc->sample_size = sample_size;
2426  sc->stsz_sample_size = sample_size;
2427  field_size = 32;
2428  } else {
2429  sample_size = 0;
2430  avio_rb24(pb); /* reserved */
2431  field_size = avio_r8(pb);
2432  }
2433  entries = avio_rb32(pb);
2434 
2435  av_log(c->fc, AV_LOG_TRACE, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2436 
2437  sc->sample_count = entries;
2438  if (sample_size)
2439  return 0;
2440 
2441  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2442  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2443  return AVERROR_INVALIDDATA;
2444  }
2445 
2446  if (!entries)
2447  return 0;
2448  if (entries >= (UINT_MAX - 4) / field_size)
2449  return AVERROR_INVALIDDATA;
2450  if (sc->sample_sizes)
2451  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2452  av_free(sc->sample_sizes);
2453  sc->sample_count = 0;
2454  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2455  if (!sc->sample_sizes)
2456  return AVERROR(ENOMEM);
2457 
2458  num_bytes = (entries*field_size+4)>>3;
2459 
2460  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2461  if (!buf) {
2462  av_freep(&sc->sample_sizes);
2463  return AVERROR(ENOMEM);
2464  }
2465 
2466  ret = ffio_read_size(pb, buf, num_bytes);
2467  if (ret < 0) {
2468  av_freep(&sc->sample_sizes);
2469  av_free(buf);
2470  return ret;
2471  }
2472 
2473  init_get_bits(&gb, buf, 8*num_bytes);
2474 
2475  for (i = 0; i < entries && !pb->eof_reached; i++) {
2476  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2477  sc->data_size += sc->sample_sizes[i];
2478  }
2479 
2480  sc->sample_count = i;
2481 
2482  av_free(buf);
2483 
2484  if (pb->eof_reached)
2485  return AVERROR_EOF;
2486 
2487  return 0;
2488 }
2489 
2491 {
2492  AVStream *st;
2493  MOVStreamContext *sc;
2494  unsigned int i, entries;
2495  int64_t duration=0;
2496  int64_t total_sample_count=0;
2497 
2498  if (c->fc->nb_streams < 1)
2499  return 0;
2500  st = c->fc->streams[c->fc->nb_streams-1];
2501  sc = st->priv_data;
2502 
2503  avio_r8(pb); /* version */
2504  avio_rb24(pb); /* flags */
2505  entries = avio_rb32(pb);
2506 
2507  av_log(c->fc, AV_LOG_TRACE, "track[%i].stts.entries = %i\n",
2508  c->fc->nb_streams-1, entries);
2509 
2510  if (sc->stts_data)
2511  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2512  av_free(sc->stts_data);
2513  sc->stts_count = 0;
2514  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2515  if (!sc->stts_data)
2516  return AVERROR(ENOMEM);
2517 
2518  for (i = 0; i < entries && !pb->eof_reached; i++) {
2519  int sample_duration;
2520  int sample_count;
2521 
2522  sample_count=avio_rb32(pb);
2523  sample_duration = avio_rb32(pb);
2524 
2525  if (sample_count < 0) {
2526  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2527  return AVERROR_INVALIDDATA;
2528  }
2529  sc->stts_data[i].count= sample_count;
2530  sc->stts_data[i].duration= sample_duration;
2531 
2532  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2533  sample_count, sample_duration);
2534 
2535  if ( i+1 == entries
2536  && i
2537  && sample_count == 1
2538  && total_sample_count > 100
2539  && sample_duration/10 > duration / total_sample_count)
2540  sample_duration = duration / total_sample_count;
2541  duration+=(int64_t)sample_duration*sample_count;
2542  total_sample_count+=sample_count;
2543  }
2544 
2545  sc->stts_count = i;
2546 
2547  sc->duration_for_fps += duration;
2548  sc->nb_frames_for_fps += total_sample_count;
2549 
2550  if (pb->eof_reached)
2551  return AVERROR_EOF;
2552 
2553  st->nb_frames= total_sample_count;
2554  if (duration)
2555  st->duration= duration;
2556  sc->track_end = duration;
2557  return 0;
2558 }
2559 
2561 {
2562  if (duration < 0) {
2563  if (duration == INT_MIN) {
2564  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2565  duration++;
2566  }
2567  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2568  }
2569 }
2570 
2572 {
2573  AVStream *st;
2574  MOVStreamContext *sc;
2575  unsigned int i, entries;
2576 
2577  if (c->fc->nb_streams < 1)
2578  return 0;
2579  st = c->fc->streams[c->fc->nb_streams-1];
2580  sc = st->priv_data;
2581 
2582  avio_r8(pb); /* version */
2583  avio_rb24(pb); /* flags */
2584  entries = avio_rb32(pb);
2585 
2586  av_log(c->fc, AV_LOG_TRACE, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2587 
2588  if (!entries)
2589  return 0;
2590  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2591  return AVERROR_INVALIDDATA;
2592  av_freep(&sc->ctts_data);
2593  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2594  if (!sc->ctts_data)
2595  return AVERROR(ENOMEM);
2596 
2597  for (i = 0; i < entries && !pb->eof_reached; i++) {
2598  int count =avio_rb32(pb);
2599  int duration =avio_rb32(pb);
2600 
2601  sc->ctts_data[i].count = count;
2602  sc->ctts_data[i].duration= duration;
2603 
2604  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2605  count, duration);
2606 
2607  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2608  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2609  av_freep(&sc->ctts_data);
2610  sc->ctts_count = 0;
2611  return 0;
2612  }
2613 
2614  if (i+2<entries)
2615  mov_update_dts_shift(sc, duration);
2616  }
2617 
2618  sc->ctts_count = i;
2619 
2620  if (pb->eof_reached)
2621  return AVERROR_EOF;
2622 
2623  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2624 
2625  return 0;
2626 }
2627 
2629 {
2630  AVStream *st;
2631  MOVStreamContext *sc;
2632  unsigned int i, entries;
2633  uint8_t version;
2634  uint32_t grouping_type;
2635 
2636  if (c->fc->nb_streams < 1)
2637  return 0;
2638  st = c->fc->streams[c->fc->nb_streams-1];
2639  sc = st->priv_data;
2640 
2641  version = avio_r8(pb); /* version */
2642  avio_rb24(pb); /* flags */
2643  grouping_type = avio_rl32(pb);
2644  if (grouping_type != MKTAG( 'r','a','p',' '))
2645  return 0; /* only support 'rap ' grouping */
2646  if (version == 1)
2647  avio_rb32(pb); /* grouping_type_parameter */
2648 
2649  entries = avio_rb32(pb);
2650  if (!entries)
2651  return 0;
2652  if (sc->rap_group)
2653  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2654  av_free(sc->rap_group);
2655  sc->rap_group_count = 0;
2656  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2657  if (!sc->rap_group)
2658  return AVERROR(ENOMEM);
2659 
2660  for (i = 0; i < entries && !pb->eof_reached; i++) {
2661  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2662  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2663  }
2664 
2665  sc->rap_group_count = i;
2666 
2667  return pb->eof_reached ? AVERROR_EOF : 0;
2668 }
2669 
2670 static void mov_build_index(MOVContext *mov, AVStream *st)
2671 {
2672  MOVStreamContext *sc = st->priv_data;
2673  int64_t current_offset;
2674  int64_t current_dts = 0;
2675  unsigned int stts_index = 0;
2676  unsigned int stsc_index = 0;
2677  unsigned int stss_index = 0;
2678  unsigned int stps_index = 0;
2679  unsigned int i, j;
2680  uint64_t stream_size = 0;
2681 
2682  if (sc->elst_count) {
2683  int i, edit_start_index = 0, unsupported = 0;
2684  int64_t empty_duration = 0; // empty duration of the first edit list entry
2685  int64_t start_time = 0; // start time of the media
2686 
2687  for (i = 0; i < sc->elst_count; i++) {
2688  const MOVElst *e = &sc->elst_data[i];
2689  if (i == 0 && e->time == -1) {
2690  /* if empty, the first entry is the start time of the stream
2691  * relative to the presentation itself */
2692  empty_duration = e->duration;
2693  edit_start_index = 1;
2694  } else if (i == edit_start_index && e->time >= 0) {
2695  start_time = e->time;
2696  } else
2697  unsupported = 1;
2698  }
2699  if (unsupported)
2700  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
2701  "a/v desync might occur, patch welcome\n");
2702 
2703  /* adjust first dts according to edit list */
2704  if ((empty_duration || start_time) && mov->time_scale > 0) {
2705  if (empty_duration)
2706  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
2707  sc->time_offset = start_time - empty_duration;
2708  current_dts = -sc->time_offset;
2709  if (sc->ctts_count>0 && sc->stts_count>0 &&
2710  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2711  /* more than 16 frames delay, dts are likely wrong
2712  this happens with files created by iMovie */
2713  sc->wrong_dts = 1;
2714  st->codecpar->video_delay = 1;
2715  }
2716  }
2717 
2718  if (!unsupported && st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
2719  sc->start_pad = start_time;
2720  }
2721 
2722  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2723  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2724  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2725  unsigned int current_sample = 0;
2726  unsigned int stts_sample = 0;
2727  unsigned int sample_size;
2728  unsigned int distance = 0;
2729  unsigned int rap_group_index = 0;
2730  unsigned int rap_group_sample = 0;
2731  int64_t last_dts = 0;
2732  int64_t dts_correction = 0;
2733  int rap_group_present = sc->rap_group_count && sc->rap_group;
2734  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2735 
2736  current_dts -= sc->dts_shift;
2737  last_dts = current_dts;
2738 
2739  if (!sc->sample_count || st->nb_index_entries)
2740  return;
2741  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2742  return;
2744  st->nb_index_entries + sc->sample_count,
2745  sizeof(*st->index_entries)) < 0) {
2746  st->nb_index_entries = 0;
2747  return;
2748  }
2750 
2751  for (i = 0; i < sc->chunk_count; i++) {
2752  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2753  current_offset = sc->chunk_offsets[i];
2754  while (stsc_index + 1 < sc->stsc_count &&
2755  i + 1 == sc->stsc_data[stsc_index + 1].first)
2756  stsc_index++;
2757 
2758  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2759  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2760  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2761  sc->stsz_sample_size = sc->sample_size;
2762  }
2763  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2764  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2765  sc->stsz_sample_size = sc->sample_size;
2766  }
2767 
2768  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2769  int keyframe = 0;
2770  if (current_sample >= sc->sample_count) {
2771  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2772  return;
2773  }
2774 
2775  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2776  keyframe = 1;
2777  if (stss_index + 1 < sc->keyframe_count)
2778  stss_index++;
2779  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2780  keyframe = 1;
2781  if (stps_index + 1 < sc->stps_count)
2782  stps_index++;
2783  }
2784  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2785  if (sc->rap_group[rap_group_index].index > 0)
2786  keyframe = 1;
2787  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2788  rap_group_sample = 0;
2789  rap_group_index++;
2790  }
2791  }
2792  if (sc->keyframe_absent
2793  && !sc->stps_count
2794  && !rap_group_present
2795  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2796  keyframe = 1;
2797  if (keyframe)
2798  distance = 0;
2799  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2800  if (sc->pseudo_stream_id == -1 ||
2801  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2802  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2803  e->pos = current_offset;
2804  e->timestamp = current_dts;
2805  e->size = sample_size;
2806  e->min_distance = distance;
2807  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2808  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2809  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2810  current_offset, current_dts, sample_size, distance, keyframe);
2811  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2812  ff_rfps_add_frame(mov->fc, st, current_dts);
2813  }
2814 
2815  current_offset += sample_size;
2816  stream_size += sample_size;
2817 
2818  /* A negative sample duration is invalid based on the spec,
2819  * but some samples need it to correct the DTS. */
2820  if (sc->stts_data[stts_index].duration < 0) {
2821  av_log(mov->fc, AV_LOG_WARNING,
2822  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
2823  sc->stts_data[stts_index].duration, stts_index,
2824  st->index);
2825  dts_correction += sc->stts_data[stts_index].duration - 1;
2826  sc->stts_data[stts_index].duration = 1;
2827  }
2828  current_dts += sc->stts_data[stts_index].duration;
2829  if (!dts_correction || current_dts + dts_correction > last_dts) {
2830  current_dts += dts_correction;
2831  dts_correction = 0;
2832  } else {
2833  /* Avoid creating non-monotonous DTS */
2834  dts_correction += current_dts - last_dts - 1;
2835  current_dts = last_dts + 1;
2836  }
2837  last_dts = current_dts;
2838  distance++;
2839  stts_sample++;
2840  current_sample++;
2841  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2842  stts_sample = 0;
2843  stts_index++;
2844  }
2845  }
2846  }
2847  if (st->duration > 0)
2848  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
2849  } else {
2850  unsigned chunk_samples, total = 0;
2851 
2852  // compute total chunk count
2853  for (i = 0; i < sc->stsc_count; i++) {
2854  unsigned count, chunk_count;
2855 
2856  chunk_samples = sc->stsc_data[i].count;
2857  if (i != sc->stsc_count - 1 &&
2858  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2859  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2860  return;
2861  }
2862 
2863  if (sc->samples_per_frame >= 160) { // gsm
2864  count = chunk_samples / sc->samples_per_frame;
2865  } else if (sc->samples_per_frame > 1) {
2866  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2867  count = (chunk_samples+samples-1) / samples;
2868  } else {
2869  count = (chunk_samples+1023) / 1024;
2870  }
2871 
2872  if (i < sc->stsc_count - 1)
2873  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2874  else
2875  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2876  total += chunk_count * count;
2877  }
2878 
2879  av_log(mov->fc, AV_LOG_TRACE, "chunk count %d\n", total);
2880  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2881  return;
2883  st->nb_index_entries + total,
2884  sizeof(*st->index_entries)) < 0) {
2885  st->nb_index_entries = 0;
2886  return;
2887  }
2888  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2889 
2890  // populate index
2891  for (i = 0; i < sc->chunk_count; i++) {
2892  current_offset = sc->chunk_offsets[i];
2893  if (stsc_index + 1 < sc->stsc_count &&
2894  i + 1 == sc->stsc_data[stsc_index + 1].first)
2895  stsc_index++;
2896  chunk_samples = sc->stsc_data[stsc_index].count;
2897 
2898  while (chunk_samples > 0) {
2899  AVIndexEntry *e;
2900  unsigned size, samples;
2901 
2902  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
2904  "Zero bytes per frame, but %d samples per frame",
2905  sc->samples_per_frame);
2906  return;
2907  }
2908 
2909  if (sc->samples_per_frame >= 160) { // gsm
2910  samples = sc->samples_per_frame;
2911  size = sc->bytes_per_frame;
2912  } else {
2913  if (sc->samples_per_frame > 1) {
2914  samples = FFMIN((1024 / sc->samples_per_frame)*
2915  sc->samples_per_frame, chunk_samples);
2916  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2917  } else {
2918  samples = FFMIN(1024, chunk_samples);
2919  size = samples * sc->sample_size;
2920  }
2921  }
2922 
2923  if (st->nb_index_entries >= total) {
2924  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2925  return;
2926  }
2927  e = &st->index_entries[st->nb_index_entries++];
2928  e->pos = current_offset;
2929  e->timestamp = current_dts;
2930  e->size = size;
2931  e->min_distance = 0;
2932  e->flags = AVINDEX_KEYFRAME;
2933  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2934  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2935  size, samples);
2936 
2937  current_offset += size;
2938  current_dts += samples;
2939  chunk_samples -= samples;
2940  }
2941  }
2942  }
2943 }
2944 
2945 static int test_same_origin(const char *src, const char *ref) {
2946  char src_proto[64];
2947  char ref_proto[64];
2948  char src_auth[256];
2949  char ref_auth[256];
2950  char src_host[256];
2951  char ref_host[256];
2952  int src_port=-1;
2953  int ref_port=-1;
2954 
2955  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
2956  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
2957 
2958  if (strlen(src) == 0) {
2959  return -1;
2960  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
2961  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
2962  strlen(src_host) + 1 >= sizeof(src_host) ||
2963  strlen(ref_host) + 1 >= sizeof(ref_host)) {
2964  return 0;
2965  } else if (strcmp(src_proto, ref_proto) ||
2966  strcmp(src_auth, ref_auth) ||
2967  strcmp(src_host, ref_host) ||
2968  src_port != ref_port) {
2969  return 0;
2970  } else
2971  return 1;
2972 }
2973 
2974 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
2975 {
2976  /* try relative path, we do not try the absolute because it can leak information about our
2977  system to an attacker */
2978  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2979  char filename[1025];
2980  const char *src_path;
2981  int i, l;
2982 
2983  /* find a source dir */
2984  src_path = strrchr(src, '/');
2985  if (src_path)
2986  src_path++;
2987  else
2988  src_path = src;
2989 
2990  /* find a next level down to target */
2991  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2992  if (ref->path[l] == '/') {
2993  if (i == ref->nlvl_to - 1)
2994  break;
2995  else
2996  i++;
2997  }
2998 
2999  /* compose filename if next level down to target was found */
3000  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3001  memcpy(filename, src, src_path - src);
3002  filename[src_path - src] = 0;
3003 
3004  for (i = 1; i < ref->nlvl_from; i++)
3005  av_strlcat(filename, "../", sizeof(filename));
3006 
3007  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3008  if (!c->use_absolute_path) {
3009  int same_origin = test_same_origin(src, filename);
3010 
3011  if (!same_origin) {
3012  av_log(c->fc, AV_LOG_ERROR,
3013  "Reference with mismatching origin, %s not tried for security reasons, "
3014  "set demuxer option use_absolute_path to allow it anyway\n",
3015  ref->path);
3016  return AVERROR(ENOENT);
3017  }
3018 
3019  if(strstr(ref->path + l + 1, "..") ||
3020  strstr(ref->path + l + 1, ":") ||
3021  (ref->nlvl_from > 1 && same_origin < 0) ||
3022  (filename[0] == '/' && src_path == src))
3023  return AVERROR(ENOENT);
3024  }
3025 
3026  if (strlen(filename) + 1 == sizeof(filename))
3027  return AVERROR(ENOENT);
3028  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3029  return 0;
3030  }
3031  } else if (c->use_absolute_path) {
3032  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3033  "this is a possible security issue\n");
3034  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3035  return 0;
3036  } else {
3037  av_log(c->fc, AV_LOG_ERROR,
3038  "Absolute path %s not tried for security reasons, "
3039  "set demuxer option use_absolute_path to allow absolute paths\n",
3040  ref->path);
3041  }
3042 
3043  return AVERROR(ENOENT);
3044 }
3045 
3047 {
3048  if (sc->time_scale <= 0) {
3049  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3050  sc->time_scale = c->time_scale;
3051  if (sc->time_scale <= 0)
3052  sc->time_scale = 1;
3053  }
3054 }
3055 
3057 {
3058  AVStream *st;
3059  MOVStreamContext *sc;
3060  int ret;
3061 
3062  st = avformat_new_stream(c->fc, NULL);
3063  if (!st) return AVERROR(ENOMEM);
3064  st->id = c->fc->nb_streams;
3065  sc = av_mallocz(sizeof(MOVStreamContext));
3066  if (!sc) return AVERROR(ENOMEM);
3067 
3068  st->priv_data = sc;
3070  sc->ffindex = st->index;
3071  c->trak_index = st->index;
3072 
3073  if ((ret = mov_read_default(c, pb, atom)) < 0)
3074  return ret;
3075 
3076  c->trak_index = -1;
3077 
3078  /* sanity checks */
3079  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3080  (!sc->sample_size && !sc->sample_count))) {
3081  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3082  st->index);
3083  return 0;
3084  }
3085 
3086  fix_timescale(c, sc);
3087 
3088  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3089 
3090  mov_build_index(c, st);
3091 
3092  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3093  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3094  if (c->enable_drefs) {
3095  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3096  av_log(c->fc, AV_LOG_ERROR,
3097  "stream %d, error opening alias: path='%s', dir='%s', "
3098  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3099  st->index, dref->path, dref->dir, dref->filename,
3100  dref->volume, dref->nlvl_from, dref->nlvl_to);
3101  } else {
3102  av_log(c->fc, AV_LOG_WARNING,
3103  "Skipped opening external track: "
3104  "stream %d, alias: path='%s', dir='%s', "
3105  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3106  "Set enable_drefs to allow this.\n",
3107  st->index, dref->path, dref->dir, dref->filename,
3108  dref->volume, dref->nlvl_from, dref->nlvl_to);
3109  }
3110  } else {
3111  sc->pb = c->fc->pb;
3112  sc->pb_is_copied = 1;
3113  }
3114 
3115  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3116  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3117  sc->height && sc->width &&
3118  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3119  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3120  ((double)st->codecpar->width * sc->height), INT_MAX);
3121  }
3122 
3123 #if FF_API_R_FRAME_RATE
3124  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3126  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3127 #endif
3128  }
3129 
3130  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3131  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3132  TAG_IS_AVCI(st->codecpar->codec_tag)) {
3133  ret = ff_generate_avci_extradata(st);
3134  if (ret < 0)
3135  return ret;
3136  }
3137 
3138  switch (st->codecpar->codec_id) {
3139 #if CONFIG_H261_DECODER
3140  case AV_CODEC_ID_H261:
3141 #endif
3142 #if CONFIG_H263_DECODER
3143  case AV_CODEC_ID_H263:
3144 #endif
3145 #if CONFIG_MPEG4_DECODER
3146  case AV_CODEC_ID_MPEG4:
3147 #endif
3148  st->codecpar->width = 0; /* let decoder init width/height */
3149  st->codecpar->height= 0;
3150  break;
3151  }
3152 
3153  // If the duration of the mp3 packets is not constant, then they could need a parser
3154  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3155  && sc->stts_count > 3
3156  && sc->stts_count*10 > st->nb_frames
3157  && sc->time_scale == st->codecpar->sample_rate) {
3159  }
3160  /* Do not need those anymore. */
3161  av_freep(&sc->chunk_offsets);
3162  av_freep(&sc->stsc_data);
3163  av_freep(&sc->sample_sizes);
3164  av_freep(&sc->keyframes);
3165  av_freep(&sc->stts_data);
3166  av_freep(&sc->stps_data);
3167  av_freep(&sc->elst_data);
3168  av_freep(&sc->rap_group);
3169 
3170  return 0;
3171 }
3172 
3174 {
3175  int ret;
3176  c->itunes_metadata = 1;
3177  ret = mov_read_default(c, pb, atom);
3178  c->itunes_metadata = 0;
3179  return ret;
3180 }
3181 
3183 {
3184  uint32_t count;
3185  uint32_t i;
3186 
3187  if (atom.size < 8)
3188  return 0;
3189 
3190  avio_skip(pb, 4);
3191  count = avio_rb32(pb);
3192  if (count > UINT_MAX / sizeof(*c->meta_keys)) {
3193  av_log(c->fc, AV_LOG_ERROR,
3194  "The 'keys' atom with the invalid key count: %d\n", count);
3195  return AVERROR_INVALIDDATA;
3196  }
3197 
3198  c->meta_keys_count = count + 1;
3199  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3200  if (!c->meta_keys)
3201  return AVERROR(ENOMEM);
3202 
3203  for (i = 1; i <= count; ++i) {
3204  uint32_t key_size = avio_rb32(pb);
3205  uint32_t type = avio_rl32(pb);
3206  if (key_size < 8) {
3207  av_log(c->fc, AV_LOG_ERROR,
3208  "The key# %d in meta has invalid size: %d\n", i, key_size);
3209  return AVERROR_INVALIDDATA;
3210  }
3211  key_size -= 8;
3212  if (type != MKTAG('m','d','t','a')) {
3213  avio_skip(pb, key_size);
3214  }
3215  c->meta_keys[i] = av_mallocz(key_size + 1);
3216  if (!c->meta_keys[i])
3217  return AVERROR(ENOMEM);
3218  avio_read(pb, c->meta_keys[i], key_size);
3219  }
3220 
3221  return 0;
3222 }
3223 
3225 {
3226  int64_t end = avio_tell(pb) + atom.size;
3227  uint8_t *key = NULL, *val = NULL, *mean = NULL;
3228  int i;
3229  int ret = 0;
3230  AVStream *st;
3231  MOVStreamContext *sc;
3232 
3233  if (c->fc->nb_streams < 1)
3234  return 0;
3235  st = c->fc->streams[c->fc->nb_streams-1];
3236  sc = st->priv_data;
3237 
3238  for (i = 0; i < 3; i++) {
3239  uint8_t **p;
3240  uint32_t len, tag;
3241 
3242  if (end - avio_tell(pb) <= 12)
3243  break;
3244 
3245  len = avio_rb32(pb);
3246  tag = avio_rl32(pb);
3247  avio_skip(pb, 4); // flags
3248 
3249  if (len < 12 || len - 12 > end - avio_tell(pb))
3250  break;
3251  len -= 12;
3252 
3253  if (tag == MKTAG('m', 'e', 'a', 'n'))
3254  p = &mean;
3255  else if (tag == MKTAG('n', 'a', 'm', 'e'))
3256  p = &key;
3257  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3258  avio_skip(pb, 4);
3259  len -= 4;
3260  p = &val;
3261  } else
3262  break;
3263 
3264  *p = av_malloc(len + 1);
3265  if (!*p)
3266  break;
3267  ret = ffio_read_size(pb, *p, len);
3268  if (ret < 0) {
3269  av_freep(p);
3270  break;
3271  }
3272  (*p)[len] = 0;
3273  }
3274 
3275  if (mean && key && val) {
3276  if (strcmp(key, "iTunSMPB") == 0) {
3277  int priming, remainder, samples;
3278  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3279  if(priming>0 && priming<16384)
3280  sc->start_pad = priming;
3281  }
3282  }
3283  if (strcmp(key, "cdec") != 0) {
3284  av_dict_set(&c->fc->metadata, key, val,
3286  key = val = NULL;
3287  }
3288  } else {
3289  av_log(c->fc, AV_LOG_VERBOSE,
3290  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3291  }
3292 
3293  avio_seek(pb, end, SEEK_SET);
3294  av_freep(&key);
3295  av_freep(&val);
3296  av_freep(&mean);
3297  return ret;
3298 }
3299 
3301 {
3302  while (atom.size > 8) {
3303  uint32_t tag = avio_rl32(pb);
3304  atom.size -= 4;
3305  if (tag == MKTAG('h','d','l','r')) {
3306  avio_seek(pb, -8, SEEK_CUR);
3307  atom.size += 8;
3308  return mov_read_default(c, pb, atom);
3309  }
3310  }
3311  return 0;
3312 }
3313 
3315 {
3316  int i;
3317  int width;
3318  int height;
3319  int display_matrix[3][3];
3320  AVStream *st;
3321  MOVStreamContext *sc;
3322  int version;
3323  int flags;
3324 
3325  if (c->fc->nb_streams < 1)
3326  return 0;
3327  st = c->fc->streams[c->fc->nb_streams-1];
3328  sc = st->priv_data;
3329 
3330  version = avio_r8(pb);
3331  flags = avio_rb24(pb);
3333 
3334  if (version == 1) {
3335  avio_rb64(pb);
3336  avio_rb64(pb);
3337  } else {
3338  avio_rb32(pb); /* creation time */
3339  avio_rb32(pb); /* modification time */
3340  }
3341  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
3342  avio_rb32(pb); /* reserved */
3343 
3344  /* highlevel (considering edits) duration in movie timebase */
3345  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
3346  avio_rb32(pb); /* reserved */
3347  avio_rb32(pb); /* reserved */
3348 
3349  avio_rb16(pb); /* layer */
3350  avio_rb16(pb); /* alternate group */
3351  avio_rb16(pb); /* volume */
3352  avio_rb16(pb); /* reserved */
3353 
3354  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
3355  // they're kept in fixed point format through all calculations
3356  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
3357  // side data, but the scale factor is not needed to calculate aspect ratio
3358  for (i = 0; i < 3; i++) {
3359  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
3360  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
3361  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
3362  }
3363 
3364  width = avio_rb32(pb); // 16.16 fixed point track width
3365  height = avio_rb32(pb); // 16.16 fixed point track height
3366  sc->width = width >> 16;
3367  sc->height = height >> 16;
3368 
3369  // save the matrix and add rotate metadata when it is not the default
3370  // identity
3371  if (display_matrix[0][0] != (1 << 16) ||
3372  display_matrix[1][1] != (1 << 16) ||
3373  display_matrix[2][2] != (1 << 30) ||
3374  display_matrix[0][1] || display_matrix[0][2] ||
3375  display_matrix[1][0] || display_matrix[1][2] ||
3376  display_matrix[2][0] || display_matrix[2][1]) {
3377  int i, j;
3378  double rotate;
3379 
3380  av_freep(&sc->display_matrix);
3381  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
3382  if (!sc->display_matrix)
3383  return AVERROR(ENOMEM);
3384 
3385  for (i = 0; i < 3; i++)
3386  for (j = 0; j < 3; j++)
3387  sc->display_matrix[i * 3 + j] = display_matrix[i][j];
3388 
3390  if (!isnan(rotate)) {
3391  char rotate_buf[64];
3392  rotate = -rotate;
3393  if (rotate < 0) // for backward compatibility
3394  rotate += 360;
3395  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
3396  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
3397  }
3398  }
3399 
3400  // transform the display width/height according to the matrix
3401  // to keep the same scale, use [width height 1<<16]
3402  if (width && height && sc->display_matrix) {
3403  double disp_transform[2];
3404 
3405  for (i = 0; i < 2; i++)
3406  disp_transform[i] = hypot(display_matrix[i][0], display_matrix[i][1]);
3407 
3408  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
3409  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
3410  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
3412  disp_transform[0] / disp_transform[1],
3413  INT_MAX);
3414  }
3415  return 0;
3416 }
3417 
3419 {
3420  MOVFragment *frag = &c->fragment;
3421  MOVTrackExt *trex = NULL;
3423  int flags, track_id, i, found = 0;
3424 
3425  avio_r8(pb); /* version */
3426  flags = avio_rb24(pb);
3427 
3428  track_id = avio_rb32(pb);
3429  if (!track_id)
3430  return AVERROR_INVALIDDATA;
3431  frag->track_id = track_id;
3432  for (i = 0; i < c->trex_count; i++)
3433  if (c->trex_data[i].track_id == frag->track_id) {
3434  trex = &c->trex_data[i];
3435  break;
3436  }
3437  if (!trex) {
3438  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
3439  return AVERROR_INVALIDDATA;
3440  }
3441 
3444  frag->moof_offset : frag->implicit_offset;
3445  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
3446 
3447  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
3448  avio_rb32(pb) : trex->duration;
3449  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
3450  avio_rb32(pb) : trex->size;
3451  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
3452  avio_rb32(pb) : trex->flags;
3453  frag->time = AV_NOPTS_VALUE;
3454  for (i = 0; i < c->fragment_index_count; i++) {
3455  int j;
3456  MOVFragmentIndex* candidate = c->fragment_index_data[i];
3457  if (candidate->track_id == frag->track_id) {
3458  av_log(c->fc, AV_LOG_DEBUG,
3459  "found fragment index for track %u\n", frag->track_id);
3460  index = candidate;
3461  for (j = index->current_item; j < index->item_count; j++) {
3462  if (frag->implicit_offset == index->items[j].moof_offset) {
3463  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
3464  "for track %u and moof_offset %"PRId64"\n",
3465  frag->track_id, index->items[j].moof_offset);
3466  frag->time = index->items[j].time;
3467  index->current_item = j + 1;
3468  found = 1;
3469  break;
3470  }
3471  }
3472  if (found)
3473  break;
3474  }
3475  }
3476  if (index && !found) {
3477  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
3478  "it doesn't have an (in-order) entry for moof_offset "
3479  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
3480  }
3481  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
3482  return 0;
3483 }
3484 
3486 {
3487  c->chapter_track = avio_rb32(pb);
3488  return 0;
3489 }
3490 
3492 {
3493  MOVTrackExt *trex;
3494  int err;
3495 
3496  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
3497  return AVERROR_INVALIDDATA;
3498  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
3499  sizeof(*c->trex_data))) < 0) {
3500  c->trex_count = 0;
3501  return err;
3502  }
3503 
3504  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
3505 
3506  trex = &c->trex_data[c->trex_count++];
3507  avio_r8(pb); /* version */
3508  avio_rb24(pb); /* flags */
3509  trex->track_id = avio_rb32(pb);
3510  trex->stsd_id = avio_rb32(pb);
3511  trex->duration = avio_rb32(pb);
3512  trex->size = avio_rb32(pb);
3513  trex->flags = avio_rb32(pb);
3514  return 0;
3515 }
3516 
3518 {
3519  MOVFragment *frag = &c->fragment;
3520  AVStream *st = NULL;
3521  MOVStreamContext *sc;
3522  int version, i;
3523 
3524  for (i = 0; i < c->fc->nb_streams; i++) {
3525  if (c->fc->streams[i]->id == frag->track_id) {
3526  st = c->fc->streams[i];
3527  break;
3528  }
3529  }
3530  if (!st) {
3531  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3532  return AVERROR_INVALIDDATA;
3533  }
3534  sc = st->priv_data;
3535  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
3536  return 0;
3537  version = avio_r8(pb);
3538  avio_rb24(pb); /* flags */
3539  if (version) {
3540  sc->track_end = avio_rb64(pb);
3541  } else {
3542  sc->track_end = avio_rb32(pb);
3543  }
3544  return 0;
3545 }
3546 
3548 {
3549  MOVFragment *frag = &c->fragment;
3550  AVStream *st = NULL;
3551  MOVStreamContext *sc;
3552  MOVStts *ctts_data;
3553  uint64_t offset;
3554  int64_t dts;
3555  int data_offset = 0;
3556  unsigned entries, first_sample_flags = frag->flags;
3557  int flags, distance, i, err;
3558 
3559  for (i = 0; i < c->fc->nb_streams; i++) {
3560  if (c->fc->streams[i]->id == frag->track_id) {
3561  st = c->fc->streams[i];
3562  break;
3563  }
3564  }
3565  if (!st) {
3566  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3567  return AVERROR_INVALIDDATA;
3568  }
3569  sc = st->priv_data;
3570  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
3571  return 0;
3572  avio_r8(pb); /* version */
3573  flags = avio_rb24(pb);
3574  entries = avio_rb32(pb);
3575  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %d\n", flags, entries);
3576 
3577  /* Always assume the presence of composition time offsets.
3578  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
3579  * 1) in the initial movie, there are no samples.
3580  * 2) in the first movie fragment, there is only one sample without composition time offset.
3581  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
3582  if (!sc->ctts_count && sc->sample_count)
3583  {
3584  /* Complement ctts table if moov atom doesn't have ctts atom. */
3585  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
3586  if (!ctts_data)
3587  return AVERROR(ENOMEM);
3588  sc->ctts_data = ctts_data;
3589  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
3590  sc->ctts_data[sc->ctts_count].duration = 0;
3591  sc->ctts_count++;
3592  }
3593  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
3594  return AVERROR_INVALIDDATA;
3595  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
3596  sizeof(*sc->ctts_data))) < 0) {
3597  sc->ctts_count = 0;
3598  return err;
3599  }
3600  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
3601  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
3602  dts = sc->track_end - sc->time_offset;
3603  offset = frag->base_data_offset + data_offset;
3604  distance = 0;
3605  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
3606  for (i = 0; i < entries && !pb->eof_reached; i++) {
3607  unsigned sample_size = frag->size;
3608  int sample_flags = i ? frag->flags : first_sample_flags;
3609  unsigned sample_duration = frag->duration;
3610  int keyframe = 0;
3611 
3612  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
3613  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
3614  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
3615  sc->ctts_data[sc->ctts_count].count = 1;
3616  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
3617  avio_rb32(pb) : 0;
3619  if (frag->time != AV_NOPTS_VALUE) {
3620  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
3621  int64_t pts = frag->time;
3622  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3623  " sc->dts_shift %d ctts.duration %d"
3624  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
3625  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
3626  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
3627  dts = pts - sc->dts_shift;
3628  if (flags & MOV_TRUN_SAMPLE_CTS) {
3629  dts -= sc->ctts_data[sc->ctts_count].duration;
3630  } else {
3631  dts -= sc->time_offset;
3632  }
3633  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
3634  } else {
3635  dts = frag->time - sc->time_offset;
3636  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3637  ", using it for dts\n", dts);
3638  }
3639  frag->time = AV_NOPTS_VALUE;
3640  }
3641  sc->ctts_count++;
3643  keyframe = 1;
3644  else
3645  keyframe =
3646  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
3648  if (keyframe)
3649  distance = 0;
3650  err = av_add_index_entry(st, offset, dts, sample_size, distance,
3651  keyframe ? AVINDEX_KEYFRAME : 0);
3652  if (err < 0) {
3653  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
3654  }
3655  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3656  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
3657  offset, dts, sample_size, distance, keyframe);
3658  distance++;
3659  dts += sample_duration;
3660  offset += sample_size;
3661  sc->data_size += sample_size;
3662  sc->duration_for_fps += sample_duration;
3663  sc->nb_frames_for_fps ++;
3664  }
3665 
3666  if (pb->eof_reached)
3667  return AVERROR_EOF;
3668 
3669  frag->implicit_offset = offset;
3670 
3671  sc->track_end = dts + sc->time_offset;
3672  if (st->duration < sc->track_end)
3673  st->duration = sc->track_end;
3674 
3675  return 0;
3676 }
3677 
3679 {
3680  int64_t offset = avio_tell(pb) + atom.size, pts;
3681  uint8_t version;
3682  unsigned i, track_id;
3683  AVStream *st = NULL;
3684  MOVStreamContext *sc;
3687  AVRational timescale;
3688 
3689  version = avio_r8(pb);
3690  if (version > 1) {
3691  avpriv_request_sample(c->fc, "sidx version %u", version);
3692  return 0;
3693  }
3694 
3695  avio_rb24(pb); // flags
3696 
3697  track_id = avio_rb32(pb); // Reference ID
3698  for (i = 0; i < c->fc->nb_streams; i++) {
3699  if (c->fc->streams[i]->id == track_id) {
3700  st = c->fc->streams[i];
3701  break;
3702  }
3703  }
3704  if (!st) {
3705  av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
3706  return 0;
3707  }
3708 
3709  sc = st->priv_data;
3710 
3711  timescale = av_make_q(1, avio_rb32(pb));
3712 
3713  if (version == 0) {
3714  pts = avio_rb32(pb);
3715  offset += avio_rb32(pb);
3716  } else {
3717  pts = avio_rb64(pb);
3718  offset += avio_rb64(pb);
3719  }
3720 
3721  avio_rb16(pb); // reserved
3722 
3723  index = av_mallocz(sizeof(MOVFragmentIndex));
3724  if (!index)
3725  return AVERROR(ENOMEM);
3726 
3727  index->track_id = track_id;
3728 
3729  index->item_count = avio_rb16(pb);
3730  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
3731 
3732  if (!index->items) {
3733  av_freep(&index);
3734  return AVERROR(ENOMEM);
3735  }
3736 
3737  for (i = 0; i < index->item_count; i++) {
3738  uint32_t size = avio_rb32(pb);
3739  uint32_t duration = avio_rb32(pb);
3740  if (size & 0x80000000) {
3741  avpriv_request_sample(c->fc, "sidx reference_type 1");
3742  av_freep(&index->items);
3743  av_freep(&index);
3744  return AVERROR_PATCHWELCOME;
3745  }
3746  avio_rb32(pb); // sap_flags
3747  index->items[i].moof_offset = offset;
3748  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
3749  offset += size;
3750  pts += duration;
3751  }
3752 
3753  st->duration = sc->track_end = pts;
3754 
3756  c->fragment_index_count + 1,
3757  sizeof(MOVFragmentIndex*));
3758  if (!tmp) {
3759  av_freep(&index->items);
3760  av_freep(&index);
3761  return AVERROR(ENOMEM);
3762  }
3763 
3764  c->fragment_index_data = tmp;
3766 
3767  if (offset == avio_size(pb))
3768  c->fragment_index_complete = 1;
3769 
3770  return 0;
3771 }
3772 
3773 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
3774 /* like the files created with Adobe Premiere 5.0, for samples see */
3775 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
3777 {
3778  int err;
3779 
3780  if (atom.size < 8)
3781  return 0; /* continue */
3782  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
3783  avio_skip(pb, atom.size - 4);
3784  return 0;
3785  }
3786  atom.type = avio_rl32(pb);
3787  atom.size -= 8;
3788  if (atom.type != MKTAG('m','d','a','t')) {
3789  avio_skip(pb, atom.size);
3790  return 0;
3791  }
3792  err = mov_read_mdat(c, pb, atom);
3793  return err;
3794 }
3795 
3797 {
3798 #if CONFIG_ZLIB
3799  AVIOContext ctx;
3800  uint8_t *cmov_data;
3801  uint8_t *moov_data; /* uncompressed data */
3802  long cmov_len, moov_len;
3803  int ret = -1;
3804 
3805  avio_rb32(pb); /* dcom atom */
3806  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
3807  return AVERROR_INVALIDDATA;
3808  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
3809  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
3810  return AVERROR_INVALIDDATA;
3811  }
3812  avio_rb32(pb); /* cmvd atom */
3813  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
3814  return AVERROR_INVALIDDATA;
3815  moov_len = avio_rb32(pb); /* uncompressed size */
3816  cmov_len = atom.size - 6 * 4;
3817 
3818  cmov_data = av_malloc(cmov_len);
3819  if (!cmov_data)
3820  return AVERROR(ENOMEM);
3821  moov_data = av_malloc(moov_len);
3822  if (!moov_data) {
3823  av_free(cmov_data);
3824  return AVERROR(ENOMEM);
3825  }
3826  ret = ffio_read_size(pb, cmov_data, cmov_len);
3827  if (ret < 0)
3828  goto free_and_return;
3829 
3830  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
3831  goto free_and_return;
3832  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
3833  goto free_and_return;
3835  atom.type = MKTAG('m','o','o','v');
3836  atom.size = moov_len;
3837  ret = mov_read_default(c, &ctx, atom);
3838 free_and_return:
3839  av_free(moov_data);
3840  av_free(cmov_data);
3841  return ret;
3842 #else
3843  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
3844  return AVERROR(ENOSYS);
3845 #endif
3846 }
3847 
3848 /* edit list atom */
3850 {
3851  MOVStreamContext *sc;
3852  int i, edit_count, version;
3853 
3854  if (c->fc->nb_streams < 1 || c->ignore_editlist)
3855  return 0;
3856  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
3857 
3858  version = avio_r8(pb); /* version */
3859  avio_rb24(pb); /* flags */
3860  edit_count = avio_rb32(pb); /* entries */
3861 
3862  if (!edit_count)
3863  return 0;
3864  if (sc->elst_data)
3865  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
3866  av_free(sc->elst_data);
3867  sc->elst_count = 0;
3868  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
3869  if (!sc->elst_data)
3870  return AVERROR(ENOMEM);
3871 
3872  av_log(c->fc, AV_LOG_TRACE, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3873  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
3874  MOVElst *e = &sc->elst_data[i];
3875 
3876  if (version == 1) {
3877  e->duration = avio_rb64(pb);
3878  e->time = avio_rb64(pb);
3879  } else {
3880  e->duration = avio_rb32(pb); /* segment duration */
3881  e->time = (int32_t)avio_rb32(pb); /* media time */
3882  }
3883  e->rate = avio_rb32(pb) / 65536.0;
3884  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3885  e->duration, e->time, e->rate);
3886  }
3887  sc->elst_count = i;
3888 
3889  return 0;
3890 }
3891 
3893 {
3894  MOVStreamContext *sc;
3895 
3896  if (c->fc->nb_streams < 1)
3897  return AVERROR_INVALIDDATA;
3898  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3899  sc->timecode_track = avio_rb32(pb);
3900  return 0;
3901 }
3902 
3904 {
3905  int ret;
3906  uint8_t uuid[16];
3907  static const uint8_t uuid_isml_manifest[] = {
3908  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3909  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3910  };
3911  static const uint8_t uuid_xmp[] = {
3912  0xbe, 0x7a, 0xcf, 0xcb, 0x97, 0xa9, 0x42, 0xe8,
3913  0x9c, 0x71, 0x99, 0x94, 0x91, 0xe3, 0xaf, 0xac
3914  };
3915 
3916  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3917  return AVERROR_INVALIDDATA;
3918 
3919  ret = avio_read(pb, uuid, sizeof(uuid));
3920  if (ret < 0) {
3921  return ret;
3922  } else if (ret != sizeof(uuid)) {
3923  return AVERROR_INVALIDDATA;
3924  }
3925  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3926  uint8_t *buffer, *ptr;
3927  char *endptr;
3928  size_t len = atom.size - sizeof(uuid);
3929 
3930  if (len < 4) {
3931  return AVERROR_INVALIDDATA;
3932  }
3933  ret = avio_skip(pb, 4); // zeroes
3934  len -= 4;
3935 
3936  buffer = av_mallocz(len + 1);
3937  if (!buffer) {
3938  return AVERROR(ENOMEM);
3939  }
3940  ret = avio_read(pb, buffer, len);
3941  if (ret < 0) {
3942  av_free(buffer);
3943  return ret;
3944  } else if (ret != len) {
3945  av_free(buffer);
3946  return AVERROR_INVALIDDATA;
3947  }
3948 
3949  ptr = buffer;
3950  while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
3951  ptr += sizeof("systemBitrate=\"") - 1;
3952  c->bitrates_count++;
3953  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3954  if (!c->bitrates) {
3955  c->bitrates_count = 0;
3956  av_free(buffer);
3957  return AVERROR(ENOMEM);
3958  }
3959  errno = 0;
3960  ret = strtol(ptr, &endptr, 10);
3961  if (ret < 0 || errno || *endptr != '"') {
3962  c->bitrates[c->bitrates_count - 1] = 0;
3963  } else {
3964  c->bitrates[c->bitrates_count - 1] = ret;
3965  }
3966  }
3967 
3968  av_free(buffer);
3969  } else if (!memcmp(uuid, uuid_xmp, sizeof(uuid))) {
3970  uint8_t *buffer;
3971  size_t len = atom.size - sizeof(uuid);
3972 
3973  buffer = av_mallocz(len + 1);
3974  if (!buffer) {
3975  return AVERROR(ENOMEM);
3976  }
3977  ret = avio_read(pb, buffer, len);
3978  if (ret < 0) {
3979  av_free(buffer);
3980  return ret;
3981  } else if (ret != len) {
3982  av_free(buffer);
3983  return AVERROR_INVALIDDATA;
3984  }
3985  if (c->export_xmp) {
3986  buffer[len] = '\0';
3987  av_dict_set(&c->fc->metadata, "xmp", buffer, 0);
3988  }
3989  av_free(buffer);
3990  }
3991  return 0;
3992 }
3993 
3995 {
3996  int ret;
3997  uint8_t content[16];
3998 
3999  if (atom.size < 8)
4000  return 0;
4001 
4002  ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
4003  if (ret < 0)
4004  return ret;
4005 
4006  if ( !c->found_moov
4007  && !c->found_mdat
4008  && !memcmp(content, "Anevia\x1A\x1A", 8)
4011  }
4012 
4013  return 0;
4014 }
4015 
4017 {
4018  uint32_t format = avio_rl32(pb);
4019  MOVStreamContext *sc;
4020  enum AVCodecID id;
4021  AVStream *st;
4022 
4023  if (c->fc->nb_streams < 1)
4024  return 0;
4025  st = c->fc->streams[c->fc->nb_streams - 1];
4026  sc = st->priv_data;
4027 
4028  switch (sc->format)
4029  {
4030  case MKTAG('e','n','c','v'): // encrypted video
4031  case MKTAG('e','n','c','a'): // encrypted audio
4032  id = mov_codec_id(st, format);
4033  if (st->codecpar->codec_id != AV_CODEC_ID_NONE &&
4034  st->codecpar->codec_id != id) {
4035  av_log(c->fc, AV_LOG_WARNING,
4036  "ignoring 'frma' atom of '%.4s', stream has codec id %d\n",
4037  (char*)&format, st->codecpar->codec_id);
4038  break;
4039  }
4040 
4041  st->codecpar->codec_id = id;
4042  sc->format = format;
4043  break;
4044 
4045  default:
4046  if (format != sc->format) {
4047  av_log(c->fc, AV_LOG_WARNING,
4048  "ignoring 'frma' atom of '%.4s', stream format is '%.4s'\n",
4049  (char*)&format, (char*)&sc->format);
4050  }
4051  break;
4052  }
4053 
4054  return 0;
4055 }
4056 
4058 {
4059  AVStream *st;
4060  MOVStreamContext *sc;
4061  size_t auxiliary_info_size;
4062 
4063  if (c->decryption_key_len == 0 || c->fc->nb_streams < 1)
4064  return 0;
4065 
4066  st = c->fc->streams[c->fc->nb_streams - 1];
4067  sc = st->priv_data;
4068 
4069  if (sc->cenc.aes_ctr) {
4070  av_log(c->fc, AV_LOG_ERROR, "duplicate senc atom\n");
4071  return AVERROR_INVALIDDATA;
4072  }
4073 
4074  avio_r8(pb); /* version */
4075  sc->cenc.use_subsamples = avio_rb24(pb) & 0x02; /* flags */
4076 
4077  avio_rb32(pb); /* entries */
4078 
4079  if (atom.size < 8) {
4080  av_log(c->fc, AV_LOG_ERROR, "senc atom size %"PRId64" too small\n", atom.size);
4081  return AVERROR_INVALIDDATA;
4082  }
4083 
4084  /* save the auxiliary info as is */
4085  auxiliary_info_size = atom.size - 8;
4086 
4087  sc->cenc.auxiliary_info = av_malloc(auxiliary_info_size);
4088  if (!sc->cenc.auxiliary_info) {
4089  return AVERROR(ENOMEM);
4090  }
4091 
4092  sc->cenc.auxiliary_info_end = sc->cenc.auxiliary_info + auxiliary_info_size;
4093 
4095 
4096  if (avio_read(pb, sc->cenc.auxiliary_info, auxiliary_info_size) != auxiliary_info_size) {
4097  av_log(c->fc, AV_LOG_ERROR, "failed to read the auxiliary info");
4098  return AVERROR_INVALIDDATA;
4099  }
4100 
4101  /* initialize the cipher */
4102  sc->cenc.aes_ctr = av_aes_ctr_alloc();
4103  if (!sc->cenc.aes_ctr) {
4104  return AVERROR(ENOMEM);
4105  }
4106 
4107  return av_aes_ctr_init(sc->cenc.aes_ctr, c->decryption_key);
4108 }
4109 
4111 {
4112  AVStream *st;
4113  MOVStreamContext *sc;
4114  size_t data_size;
4115  int atom_header_size;
4116  int flags;
4117 
4118  if (c->decryption_key_len == 0 || c->fc->nb_streams < 1)
4119  return 0;
4120 
4121  st = c->fc->streams[c->fc->nb_streams - 1];
4122  sc = st->priv_data;
4123 
4125  av_log(c->fc, AV_LOG_ERROR, "duplicate saiz atom\n");
4126  return AVERROR_INVALIDDATA;
4127  }
4128 
4129  atom_header_size = 9;
4130 
4131  avio_r8(pb); /* version */
4132  flags = avio_rb24(pb);
4133 
4134  if ((flags & 0x01) != 0) {
4135  atom_header_size += 8;
4136 
4137  avio_rb32(pb); /* info type */
4138  avio_rb32(pb); /* info type param */
4139  }
4140 
4142  avio_rb32(pb); /* entries */
4143 
4144  if (atom.size <= atom_header_size) {
4145  return 0;
4146  }
4147 
4148  /* save the auxiliary info sizes as is */
4149  data_size = atom.size - atom_header_size;
4150 
4151  sc->cenc.auxiliary_info_sizes = av_malloc(data_size);
4152  if (!sc->cenc.auxiliary_info_sizes) {
4153  return AVERROR(ENOMEM);
4154  }
4155 
4156  sc->cenc.auxiliary_info_sizes_count = data_size;
4157 
4158  if (avio_read(pb, sc->cenc.auxiliary_info_sizes, data_size) != data_size) {
4159  av_log(c->fc, AV_LOG_ERROR, "failed to read the auxiliary info sizes");
4160  return AVERROR_INVALIDDATA;
4161  }
4162 
4163  return 0;
4164 }
4165 
4166 static int cenc_filter(MOVContext *c, MOVStreamContext *sc, uint8_t *input, int size)
4167 {
4168  uint32_t encrypted_bytes;
4169  uint16_t subsample_count;
4170  uint16_t clear_bytes;
4171  uint8_t* input_end = input + size;
4172 
4173  /* read the iv */
4175  av_log(c->fc, AV_LOG_ERROR, "failed to read iv from the auxiliary info\n");
4176  return AVERROR_INVALIDDATA;
4177  }
4178 
4181 
4182  if (!sc->cenc.use_subsamples)
4183  {
4184  /* decrypt the whole packet */
4185  av_aes_ctr_crypt(sc->cenc.aes_ctr, input, input, size);
4186  return 0;
4187  }
4188 
4189  /* read the subsample count */
4190  if (sizeof(uint16_t) > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) {
4191  av_log(c->fc, AV_LOG_ERROR, "failed to read subsample count from the auxiliary info\n");
4192  return AVERROR_INVALIDDATA;
4193  }
4194 
4195  subsample_count = AV_RB16(sc->cenc.auxiliary_info_pos);
4196  sc->cenc.auxiliary_info_pos += sizeof(uint16_t);
4197 
4198  for (; subsample_count > 0; subsample_count--)
4199  {
4200  if (6 > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) {
4201  av_log(c->fc, AV_LOG_ERROR, "failed to read subsample from the auxiliary info\n");
4202  return AVERROR_INVALIDDATA;
4203  }
4204 
4205  /* read the number of clear / encrypted bytes */
4206  clear_bytes = AV_RB16(sc->cenc.auxiliary_info_pos);
4207  sc->cenc.auxiliary_info_pos += sizeof(uint16_t);
4208  encrypted_bytes = AV_RB32(sc->cenc.auxiliary_info_pos);
4209  sc->cenc.auxiliary_info_pos += sizeof(uint32_t);
4210 
4211  if ((uint64_t)clear_bytes + encrypted_bytes > input_end - input) {
4212  av_log(c->fc, AV_LOG_ERROR, "subsample size exceeds the packet size left\n");
4213  return AVERROR_INVALIDDATA;
4214  }
4215 
4216  /* skip the clear bytes */
4217  input += clear_bytes;
4218 
4219  /* decrypt the encrypted bytes */
4220  av_aes_ctr_crypt(sc->cenc.aes_ctr, input, input, encrypted_bytes);
4221  input += encrypted_bytes;
4222  }
4223 
4224  if (input < input_end) {
4225  av_log(c->fc, AV_LOG_ERROR, "leftover packet bytes after subsample processing\n");
4226  return AVERROR_INVALIDDATA;
4227  }
4228 
4229  return 0;
4230 }
4231 
4233 {
4234  size_t auxiliary_info_seek_offset = 0;
4235  int i;
4236 
4238  auxiliary_info_seek_offset = (size_t)sc->cenc.auxiliary_info_default_size * sc->current_sample;
4239  } else if (sc->cenc.auxiliary_info_sizes) {
4241  av_log(s, AV_LOG_ERROR, "current sample %d greater than the number of auxiliary info sample sizes %"SIZE_SPECIFIER"\n",
4243  return AVERROR_INVALIDDATA;
4244  }
4245 
4246  for (i = 0; i < sc->current_sample; i++) {
4247  auxiliary_info_seek_offset += sc->cenc.auxiliary_info_sizes[i];
4248  }
4249  }
4250 
4251  if (auxiliary_info_seek_offset > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info) {
4252  av_log(s, AV_LOG_ERROR, "auxiliary info offset %"SIZE_SPECIFIER" greater than auxiliary info size %"SIZE_SPECIFIER"\n",
4253  auxiliary_info_seek_offset, (size_t)(sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info));
4254  return AVERROR_INVALIDDATA;
4255  }
4256 
4257  sc->cenc.auxiliary_info_pos = sc->cenc.auxiliary_info + auxiliary_info_seek_offset;
4258 
4259  return 0;
4260 }
4261 
4263 { MKTAG('A','C','L','R'), mov_read_aclr },
4264 { MKTAG('A','P','R','G'), mov_read_avid },
4265 { MKTAG('A','A','L','P'), mov_read_avid },
4266 { MKTAG('A','R','E','S'), mov_read_ares },
4267 { MKTAG('a','v','s','s'), mov_read_avss },
4268 { MKTAG('c','h','p','l'), mov_read_chpl },
4269 { MKTAG('c','o','6','4'), mov_read_stco },
4270 { MKTAG('c','o','l','r'), mov_read_colr },
4271 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
4272 { MKTAG('d','i','n','f'), mov_read_default },
4273 { MKTAG('D','p','x','E'), mov_read_dpxe },
4274 { MKTAG('d','r','e','f'), mov_read_dref },
4275 { MKTAG('e','d','t','s'), mov_read_default },
4276 { MKTAG('e','l','s','t'), mov_read_elst },
4277 { MKTAG('e','n','d','a'), mov_read_enda },
4278 { MKTAG('f','i','e','l'), mov_read_fiel },
4279 { MKTAG('a','d','r','m'), mov_read_adrm },
4280 { MKTAG('f','t','y','p'), mov_read_ftyp },
4281 { MKTAG('g','l','b','l'), mov_read_glbl },
4282 { MKTAG('h','d','l','r'), mov_read_hdlr },
4283 { MKTAG('i','l','s','t'), mov_read_ilst },
4284 { MKTAG('j','p','2','h'), mov_read_jp2h },
4285 { MKTAG('m','d','a','t'), mov_read_mdat },
4286 { MKTAG('m','d','h','d'), mov_read_mdhd },
4287 { MKTAG('m','d','i','a'), mov_read_default },
4288 { MKTAG('m','e','t','a'), mov_read_meta },
4289 { MKTAG('m','i','n','f'), mov_read_default },
4290 { MKTAG('m','o','o','f'), mov_read_moof },
4291 { MKTAG('m','o','o','v'), mov_read_moov },
4292 { MKTAG('m','v','e','x'), mov_read_default },
4293 { MKTAG('m','v','h','d'), mov_read_mvhd },
4294 { MKTAG('S','M','I',' '), mov_read_svq3 },
4295 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
4296 { MKTAG('a','v','c','C'), mov_read_glbl },
4297 { MKTAG('p','a','s','p'), mov_read_pasp },
4298 { MKTAG('s','i','d','x'), mov_read_sidx },
4299 { MKTAG('s','t','b','l'), mov_read_default },
4300 { MKTAG('s','t','c','o'), mov_read_stco },
4301 { MKTAG('s','t','p','s'), mov_read_stps },
4302 { MKTAG('s','t','r','f'), mov_read_strf },
4303 { MKTAG('s','t','s','c'), mov_read_stsc },
4304 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
4305 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
4306 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
4307 { MKTAG('s','t','t','s'), mov_read_stts },
4308 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
4309 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
4310 { MKTAG('t','f','d','t'), mov_read_tfdt },
4311 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
4312 { MKTAG('t','r','a','k'), mov_read_trak },
4313 { MKTAG('t','r','a','f'), mov_read_default },
4314 { MKTAG('t','r','e','f'), mov_read_default },
4315 { MKTAG('t','m','c','d'), mov_read_tmcd },
4316 { MKTAG('c','h','a','p'), mov_read_chap },
4317 { MKTAG('t','r','e','x'), mov_read_trex },
4318 { MKTAG('t','r','u','n'), mov_read_trun },
4319 { MKTAG('u','d','t','a'), mov_read_default },
4320 { MKTAG('w','a','v','e'), mov_read_wave },
4321 { MKTAG('e','s','d','s'), mov_read_esds },
4322 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
4323 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
4324 { MKTAG('d','d','t','s'), mov_read_ddts }, /* DTS audio descriptor */
4325 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
4326 { MKTAG('w','f','e','x'), mov_read_wfex },
4327 { MKTAG('c','m','o','v'), mov_read_cmov },
4328 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
4329 { MKTAG('d','v','c','1'), mov_read_dvc1 },
4330 { MKTAG('s','b','g','p'), mov_read_sbgp },
4331 { MKTAG('h','v','c','C'), mov_read_glbl },
4332 { MKTAG('u','u','i','d'), mov_read_uuid },
4333 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
4334 { MKTAG('f','r','e','e'), mov_read_free },
4335 { MKTAG('-','-','-','-'), mov_read_custom },
4336 { MKTAG('s','i','n','f'), mov_read_default },
4337 { MKTAG('f','r','m','a'), mov_read_frma },
4338 { MKTAG('s','e','n','c'), mov_read_senc },
4339 { MKTAG('s','a','i','z'), mov_read_saiz },
4340 { 0, NULL }
4341 };
4342 
4344 {
4345  int64_t total_size = 0;
4346  MOVAtom a;
4347  int i;
4348 
4349  if (c->atom_depth > 10) {
4350  av_log(c->fc, AV_LOG_ERROR, "Atoms too deeply nested\n");
4351  return AVERROR_INVALIDDATA;
4352  }
4353  c->atom_depth ++;
4354 
4355  if (atom.size < 0)
4356  atom.size = INT64_MAX;
4357  while (total_size + 8 <= atom.size && !avio_feof(pb)) {
4358  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
4359  a.size = atom.size;
4360  a.type=0;
4361  if (atom.size >= 8) {
4362  a.size = avio_rb32(pb);
4363  a.type = avio_rl32(pb);
4364  if (a.type == MKTAG('f','r','e','e') &&
4365  a.size >= 8 &&
4366  c->moov_retry) {
4367  uint8_t buf[8];
4368  uint32_t *type = (uint32_t *)buf + 1;
4369  if (avio_read(pb, buf, 8) != 8)
4370  return AVERROR_INVALIDDATA;
4371  avio_seek(pb, -8, SEEK_CUR);
4372  if (*type == MKTAG('m','v','h','d') ||
4373  *type == MKTAG('c','m','o','v')) {
4374  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
4375  a.type = MKTAG('m','o','o','v');
4376  }
4377  }
4378  if (atom.type != MKTAG('r','o','o','t') &&
4379  atom.type != MKTAG('m','o','o','v'))
4380  {
4381  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
4382  {
4383  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
4384  avio_skip(pb, -8);
4385  c->atom_depth --;
4386  return 0;
4387  }
4388  }
4389  total_size += 8;
4390  if (a.size == 1 && total_size + 8 <= atom.size) { /* 64 bit extended size */
4391  a.size = avio_rb64(pb) - 8;
4392  total_size += 8;
4393  }
4394  }
4395  av_log(c->fc, AV_LOG_TRACE, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
4396  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
4397  if (a.size == 0) {
4398  a.size = atom.size - total_size + 8;
4399  }
4400  a.size -= 8;
4401  if (a.size < 0)
4402  break;
4403  a.size = FFMIN(a.size, atom.size - total_size);
4404 
4405  for (i = 0; mov_default_parse_table[i].type; i++)
4406  if (mov_default_parse_table[i].type == a.type) {
4407  parse = mov_default_parse_table[i].parse;
4408  break;
4409  }
4410 
4411  // container is user data
4412  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
4413  atom.type == MKTAG('i','l','s','t')))
4415 
4416  // Supports parsing the QuickTime Metadata Keys.
4417  // https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/Metadata/Metadata.html
4418  if (!parse && c->found_hdlr_mdta &&
4419  atom.type == MKTAG('m','e','t','a') &&
4420  a.type == MKTAG('k','e','y','s')) {
4421  parse = mov_read_keys;
4422  }
4423 
4424  if (!parse) { /* skip leaf atoms data */
4425  avio_skip(pb, a.size);
4426  } else {
4427  int64_t start_pos = avio_tell(pb);
4428  int64_t left;
4429  int err = parse(c, pb, a);
4430  if (err < 0) {
4431  c->atom_depth --;
4432  return err;
4433  }
4434  if (c->found_moov && c->found_mdat &&
4435  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX || c->fragment_index_complete) ||
4436  start_pos + a.size == avio_size(pb))) {
4437  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX || c->fragment_index_complete)
4438  c->next_root_atom = start_pos + a.size;
4439  c->atom_depth --;
4440  return 0;
4441  }
4442  left = a.size - avio_tell(pb) + start_pos;
4443  if (left > 0) /* skip garbage at atom end */
4444  avio_skip(pb, left);
4445  else if (left < 0) {
4446  av_log(c->fc, AV_LOG_WARNING,
4447  "overread end of atom '%.4s' by %"PRId64" bytes\n",
4448  (char*)&a.type, -left);
4449  avio_seek(pb, left, SEEK_CUR);
4450  }
4451  }
4452 
4453  total_size += a.size;
4454  }
4455 
4456  if (total_size < atom.size && atom.size < 0x7ffff)
4457  avio_skip(pb, atom.size - total_size);
4458 
4459  c->atom_depth --;
4460  return 0;
4461 }
4462 
4463 static int mov_probe(AVProbeData *p)
4464 {
4465  int64_t offset;
4466  uint32_t tag;
4467  int score = 0;
4468  int moov_offset = -1;
4469 
4470  /* check file header */
4471  offset = 0;
4472  for (;;) {
4473  /* ignore invalid offset */
4474  if ((offset + 8) > (unsigned int)p->buf_size)
4475  break;
4476  tag = AV_RL32(p->buf + offset + 4);
4477  switch(tag) {
4478  /* check for obvious tags */
4479  case MKTAG('m','o','o','v'):
4480  moov_offset = offset + 4;
4481  case MKTAG('m','d','a','t'):
4482  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
4483  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
4484  case MKTAG('f','t','y','p'):
4485  if (AV_RB32(p->buf+offset) < 8 &&
4486  (AV_RB32(p->buf+offset) != 1 ||
4487  offset + 12 > (unsigned int)p->buf_size ||
4488  AV_RB64(p->buf+offset + 8) == 0)) {
4489  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
4490  } else if (tag == MKTAG('f','t','y','p') &&
4491  ( AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')
4492  || AV_RL32(p->buf + offset + 8) == MKTAG('j','p','x',' ')
4493  )) {
4494  score = FFMAX(score, 5);
4495  } else {
4496  score = AVPROBE_SCORE_MAX;
4497  }
4498  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4499  break;
4500  /* those are more common words, so rate then a bit less */
4501  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
4502  case MKTAG('w','i','d','e'):
4503  case MKTAG('f','r','e','e'):
4504  case MKTAG('j','u','n','k'):
4505  case MKTAG('p','i','c','t'):
4506  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
4507  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4508  break;
4509  case MKTAG(0x82,0x82,0x7f,0x7d):
4510  case MKTAG('s','k','i','p'):
4511  case MKTAG('u','u','i','d'):
4512  case MKTAG('p','r','f','l'):
4513  /* if we only find those cause probedata is too small at least rate them */
4514  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
4515  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4516  break;
4517  default:
4518  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4519  }
4520  }
4521  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
4522  /* moov atom in the header - we should make sure that this is not a
4523  * MOV-packed MPEG-PS */
4524  offset = moov_offset;
4525 
4526  while(offset < (p->buf_size - 16)){ /* Sufficient space */
4527  /* We found an actual hdlr atom */
4528  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
4529  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
4530  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
4531  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
4532  /* We found a media handler reference atom describing an
4533  * MPEG-PS-in-MOV, return a
4534  * low score to force expanding the probe window until
4535  * mpegps_probe finds what it needs */
4536  return 5;
4537  }else
4538  /* Keep looking */
4539  offset+=2;
4540  }
4541  }
4542 
4543  return score;
4544 }
4545 
4546 // must be done after parsing all trak because there's no order requirement