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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->codec->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 > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
519  entries >= UINT_MAX / sizeof(*sc->drefs))
520  return AVERROR_INVALIDDATA;
521  av_free(sc->drefs);
522  sc->drefs_count = 0;
523  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
524  if (!sc->drefs)
525  return AVERROR(ENOMEM);
526  sc->drefs_count = entries;
527 
528  for (i = 0; i < entries; i++) {
529  MOVDref *dref = &sc->drefs[i];
530  uint32_t size = avio_rb32(pb);
531  int64_t next = avio_tell(pb) + size - 4;
532 
533  if (size < 12)
534  return AVERROR_INVALIDDATA;
535 
536  dref->type = avio_rl32(pb);
537  avio_rb32(pb); // version + flags
538  av_log(c->fc, AV_LOG_TRACE, "type %.4s size %d\n", (char*)&dref->type, size);
539 
540  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
541  /* macintosh alias record */
542  uint16_t volume_len, len;
543  int16_t type;
544  int ret;
545 
546  avio_skip(pb, 10);
547 
548  volume_len = avio_r8(pb);
549  volume_len = FFMIN(volume_len, 27);
550  ret = ffio_read_size(pb, dref->volume, 27);
551  if (ret < 0)
552  return ret;
553  dref->volume[volume_len] = 0;
554  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
555 
556  avio_skip(pb, 12);
557 
558  len = avio_r8(pb);
559  len = FFMIN(len, 63);
560  ret = ffio_read_size(pb, dref->filename, 63);
561  if (ret < 0)
562  return ret;
563  dref->filename[len] = 0;
564  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
565 
566  avio_skip(pb, 16);
567 
568  /* read next level up_from_alias/down_to_target */
569  dref->nlvl_from = avio_rb16(pb);
570  dref->nlvl_to = avio_rb16(pb);
571  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
572  dref->nlvl_from, dref->nlvl_to);
573 
574  avio_skip(pb, 16);
575 
576  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
577  if(avio_feof(pb))
578  return AVERROR_EOF;
579  type = avio_rb16(pb);
580  len = avio_rb16(pb);
581  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
582  if (len&1)
583  len += 1;
584  if (type == 2) { // absolute path
585  av_free(dref->path);
586  dref->path = av_mallocz(len+1);
587  if (!dref->path)
588  return AVERROR(ENOMEM);
589 
590  ret = ffio_read_size(pb, dref->path, len);
591  if (ret < 0) {
592  av_freep(&dref->path);
593  return ret;
594  }
595  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
596  len -= volume_len;
597  memmove(dref->path, dref->path+volume_len, len);
598  dref->path[len] = 0;
599  }
600  for (j = 0; j < len; j++)
601  if (dref->path[j] == ':' || dref->path[j] == 0)
602  dref->path[j] = '/';
603  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
604  } else if (type == 0) { // directory name
605  av_free(dref->dir);
606  dref->dir = av_malloc(len+1);
607  if (!dref->dir)
608  return AVERROR(ENOMEM);
609 
610  ret = ffio_read_size(pb, dref->dir, len);
611  if (ret < 0) {
612  av_freep(&dref->dir);
613  return ret;
614  }
615  dref->dir[len] = 0;
616  for (j = 0; j < len; j++)
617  if (dref->dir[j] == ':')
618  dref->dir[j] = '/';
619  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
620  } else
621  avio_skip(pb, len);
622  }
623  } else {
624  av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x08%x size %d\n",
625  dref->type, size);
626  entries--;
627  i--;
628  }
629  avio_seek(pb, next, SEEK_SET);
630  }
631  return 0;
632 }
633 
635 {
636  AVStream *st;
637  uint32_t type;
638  uint32_t av_unused ctype;
639  int64_t title_size;
640  char *title_str;
641  int ret;
642 
643  avio_r8(pb); /* version */
644  avio_rb24(pb); /* flags */
645 
646  /* component type */
647  ctype = avio_rl32(pb);
648  type = avio_rl32(pb); /* component subtype */
649 
650  av_log(c->fc, AV_LOG_TRACE, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
651  av_log(c->fc, AV_LOG_TRACE, "stype= %.4s\n", (char*)&type);
652 
653  if (c->trak_index < 0) { // meta not inside a trak
654  if (type == MKTAG('m','d','t','a')) {
655  c->found_hdlr_mdta = 1;
656  }
657  return 0;
658  }
659 
660  st = c->fc->streams[c->fc->nb_streams-1];
661 
662  if (type == MKTAG('v','i','d','e'))
664  else if (type == MKTAG('s','o','u','n'))
666  else if (type == MKTAG('m','1','a',' '))
668  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
670 
671  avio_rb32(pb); /* component manufacture */
672  avio_rb32(pb); /* component flags */
673  avio_rb32(pb); /* component flags mask */
674 
675  title_size = atom.size - 24;
676  if (title_size > 0) {
677  title_str = av_malloc(title_size + 1); /* Add null terminator */
678  if (!title_str)
679  return AVERROR(ENOMEM);
680 
681  ret = ffio_read_size(pb, title_str, title_size);
682  if (ret < 0) {
683  av_freep(&title_str);
684  return ret;
685  }
686  title_str[title_size] = 0;
687  if (title_str[0]) {
688  int off = (!c->isom && title_str[0] == title_size - 1);
689  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
690  }
691  av_freep(&title_str);
692  }
693 
694  return 0;
695 }
696 
698 {
699  AVStream *st;
700  int tag;
701 
702  if (fc->nb_streams < 1)
703  return 0;
704  st = fc->streams[fc->nb_streams-1];
705 
706  avio_rb32(pb); /* version + flags */
707  ff_mp4_read_descr(fc, pb, &tag);
708  if (tag == MP4ESDescrTag) {
710  } else
711  avio_rb16(pb); /* ID */
712 
713  ff_mp4_read_descr(fc, pb, &tag);
714  if (tag == MP4DecConfigDescrTag)
715  ff_mp4_read_dec_config_descr(fc, st, pb);
716  return 0;
717 }
718 
720 {
721  return ff_mov_read_esds(c->fc, pb);
722 }
723 
725 {
726  AVStream *st;
727  enum AVAudioServiceType *ast;
728  int ac3info, acmod, lfeon, bsmod;
729 
730  if (c->fc->nb_streams < 1)
731  return 0;
732  st = c->fc->streams[c->fc->nb_streams-1];
733 
735  sizeof(*ast));
736  if (!ast)
737  return AVERROR(ENOMEM);
738 
739  ac3info = avio_rb24(pb);
740  bsmod = (ac3info >> 14) & 0x7;
741  acmod = (ac3info >> 11) & 0x7;
742  lfeon = (ac3info >> 10) & 0x1;
743  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
745  if (lfeon)
747  *ast = bsmod;
748  if (st->codec->channels > 1 && bsmod == 0x7)
750 
751  st->codec->audio_service_type = *ast;
752 
753  return 0;
754 }
755 
757 {
758  AVStream *st;
759  enum AVAudioServiceType *ast;
760  int eac3info, acmod, lfeon, bsmod;
761 
762  if (c->fc->nb_streams < 1)
763  return 0;
764  st = c->fc->streams[c->fc->nb_streams-1];
765 
767  sizeof(*ast));
768  if (!ast)
769  return AVERROR(ENOMEM);
770 
771  /* No need to parse fields for additional independent substreams and its
772  * associated dependent substreams since libavcodec's E-AC-3 decoder
773  * does not support them yet. */
774  avio_rb16(pb); /* data_rate and num_ind_sub */
775  eac3info = avio_rb24(pb);
776  bsmod = (eac3info >> 12) & 0x1f;
777  acmod = (eac3info >> 9) & 0x7;
778  lfeon = (eac3info >> 8) & 0x1;
780  if (lfeon)
783  *ast = bsmod;
784  if (st->codec->channels > 1 && bsmod == 0x7)
786 
787  st->codec->audio_service_type = *ast;
788 
789  return 0;
790 }
791 
793 {
794  const uint32_t ddts_size = 20;
795  AVStream *st = NULL;
796  uint8_t *buf = NULL;
797  uint32_t frame_duration_code = 0;
798  uint32_t channel_layout_code = 0;
799  GetBitContext gb;
800 
801  buf = av_malloc(ddts_size + FF_INPUT_BUFFER_PADDING_SIZE);
802  if (!buf) {
803  return AVERROR(ENOMEM);
804  }
805  if (avio_read(pb, buf, ddts_size) < ddts_size) {
806  av_free(buf);
807  return AVERROR_INVALIDDATA;
808  }
809 
810  init_get_bits(&gb, buf, 8*ddts_size);
811 
812  if (c->fc->nb_streams < 1) {
813  return 0;
814  }
815  st = c->fc->streams[c->fc->nb_streams-1];
816 
817  st->codec->sample_rate = get_bits_long(&gb, 32);
818  skip_bits_long(&gb, 32); /* max bitrate */
819  st->codec->bit_rate = get_bits_long(&gb, 32);
820  st->codec->bits_per_coded_sample = get_bits(&gb, 8);
821  frame_duration_code = get_bits(&gb, 2);
822  skip_bits(&gb, 30); /* various fields */
823  channel_layout_code = get_bits(&gb, 16);
824 
825  st->codec->frame_size =
826  (frame_duration_code == 0) ? 512 :
827  (frame_duration_code == 1) ? 1024 :
828  (frame_duration_code == 2) ? 2048 :
829  (frame_duration_code == 3) ? 4096 : 0;
830 
831  if (channel_layout_code > 0xff) {
832  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
833  }
834  st->codec->channel_layout =
835  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
836  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
837  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
838  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
839  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
840  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
841 
843 
844  return 0;
845 }
846 
848 {
849  AVStream *st;
850 
851  if (c->fc->nb_streams < 1)
852  return 0;
853  st = c->fc->streams[c->fc->nb_streams-1];
854 
855  if (atom.size < 16)
856  return 0;
857 
858  /* skip version and flags */
859  avio_skip(pb, 4);
860 
861  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
862 
863  return 0;
864 }
865 
867 {
868  AVStream *st;
869  int ret;
870 
871  if (c->fc->nb_streams < 1)
872  return 0;
873  st = c->fc->streams[c->fc->nb_streams-1];
874 
875  if ((ret = ff_get_wav_header(c->fc, pb, st->codec, atom.size, 0)) < 0)
876  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
877 
878  return ret;
879 }
880 
882 {
883  const int num = avio_rb32(pb);
884  const int den = avio_rb32(pb);
885  AVStream *st;
886 
887  if (c->fc->nb_streams < 1)
888  return 0;
889  st = c->fc->streams[c->fc->nb_streams-1];
890 
891  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
892  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
894  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
896  num, den);
897  } else if (den != 0) {
899  num, den, 32767);
900  }
901  return 0;
902 }
903 
904 /* this atom contains actual media data */
906 {
907  if (atom.size == 0) /* wrong one (MP4) */
908  return 0;
909  c->found_mdat=1;
910  return 0; /* now go for moov */
911 }
912 
913 #define DRM_BLOB_SIZE 56
914 
916 {
917  uint8_t intermediate_key[20];
918  uint8_t intermediate_iv[20];
919  uint8_t input[64];
920  uint8_t output[64];
921  uint8_t file_checksum[20];
922  uint8_t calculated_checksum[20];
923  struct AVSHA *sha;
924  int i;
925  int ret = 0;
926  uint8_t *activation_bytes = c->activation_bytes;
927  uint8_t *fixed_key = c->audible_fixed_key;
928 
929  c->aax_mode = 1;
930 
931  sha = av_sha_alloc();
932  if (!sha)
933  return AVERROR(ENOMEM);
934  c->aes_decrypt = av_aes_alloc();
935  if (!c->aes_decrypt) {
936  ret = AVERROR(ENOMEM);
937  goto fail;
938  }
939 
940  /* drm blob processing */
941  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
942  avio_read(pb, input, DRM_BLOB_SIZE);
943  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
944  avio_read(pb, file_checksum, 20);
945 
946  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
947  for (i = 0; i < 20; i++)
948  av_log(sha, AV_LOG_INFO, "%02x", file_checksum[i]);
949  av_log(c->fc, AV_LOG_INFO, "\n");
950 
951  /* verify activation data */
952  if (!activation_bytes) {
953  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
954  ret = 0; /* allow ffprobe to continue working on .aax files */
955  goto fail;
956  }
957  if (c->activation_bytes_size != 4) {
958  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
959  ret = AVERROR(EINVAL);
960  goto fail;
961  }
962 
963  /* verify fixed key */
964  if (c->audible_fixed_key_size != 16) {
965  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
966  ret = AVERROR(EINVAL);
967  goto fail;
968  }
969 
970  /* AAX (and AAX+) key derivation */
971  av_sha_init(sha, 160);
972  av_sha_update(sha, fixed_key, 16);
973  av_sha_update(sha, activation_bytes, 4);
974  av_sha_final(sha, intermediate_key);
975  av_sha_init(sha, 160);
976  av_sha_update(sha, fixed_key, 16);
977  av_sha_update(sha, intermediate_key, 20);
978  av_sha_update(sha, activation_bytes, 4);
979  av_sha_final(sha, intermediate_iv);
980  av_sha_init(sha, 160);
981  av_sha_update(sha, intermediate_key, 16);
982  av_sha_update(sha, intermediate_iv, 16);
983  av_sha_final(sha, calculated_checksum);
984  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
985  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
986  ret = AVERROR_INVALIDDATA;
987  goto fail;
988  }
989  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
990  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
991  for (i = 0; i < 4; i++) {
992  // file data (in output) is stored in big-endian mode
993  if (activation_bytes[i] != output[3 - i]) { // critical error
994  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
995  ret = AVERROR_INVALIDDATA;
996  goto fail;
997  }
998  }
999  memcpy(c->file_key, output + 8, 16);
1000  memcpy(input, output + 26, 16);
1001  av_sha_init(sha, 160);
1002  av_sha_update(sha, input, 16);
1003  av_sha_update(sha, c->file_key, 16);
1004  av_sha_update(sha, fixed_key, 16);
1005  av_sha_final(sha, c->file_iv);
1006 
1007 fail:
1008  av_free(sha);
1009 
1010  return ret;
1011 }
1012 
1013 // Audible AAX (and AAX+) bytestream decryption
1014 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1015 {
1016  int blocks = 0;
1017  unsigned char iv[16];
1018 
1019  memcpy(iv, c->file_iv, 16); // iv is overwritten
1020  blocks = size >> 4; // trailing bytes are not encrypted!
1021  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1022  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1023 
1024  return 0;
1025 }
1026 
1027 /* read major brand, minor version and compatible brands and store them as metadata */
1029 {
1030  uint32_t minor_ver;
1031  int comp_brand_size;
1032  char* comp_brands_str;
1033  uint8_t type[5] = {0};
1034  int ret = ffio_read_size(pb, type, 4);
1035  if (ret < 0)
1036  return ret;
1037 
1038  if (strcmp(type, "qt "))
1039  c->isom = 1;
1040  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1041  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1042  minor_ver = avio_rb32(pb); /* minor version */
1043  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1044 
1045  comp_brand_size = atom.size - 8;
1046  if (comp_brand_size < 0)
1047  return AVERROR_INVALIDDATA;
1048  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1049  if (!comp_brands_str)
1050  return AVERROR(ENOMEM);
1051 
1052  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1053  if (ret < 0) {
1054  av_freep(&comp_brands_str);
1055  return ret;
1056  }
1057  comp_brands_str[comp_brand_size] = 0;
1058  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1059  av_freep(&comp_brands_str);
1060 
1061  return 0;
1062 }
1063 
1064 /* this atom should contain all header atoms */
1066 {
1067  int ret;
1068 
1069  if (c->found_moov) {
1070  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1071  avio_skip(pb, atom.size);
1072  return 0;
1073  }
1074 
1075  if ((ret = mov_read_default(c, pb, atom)) < 0)
1076  return ret;
1077  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1078  /* so we don't parse the whole file if over a network */
1079  c->found_moov=1;
1080  return 0; /* now go for mdat */
1081 }
1082 
1084 {
1085  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1086  c->has_looked_for_mfra = 1;
1087  if (pb->seekable) {
1088  int ret;
1089  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1090  "for a mfra\n");
1091  if ((ret = mov_read_mfra(c, pb)) < 0) {
1092  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1093  "read the mfra (may be a live ismv)\n");
1094  }
1095  } else {
1096  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1097  "seekable, can not look for mfra\n");
1098  }
1099  }
1101  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1102  return mov_read_default(c, pb, atom);
1103 }
1104 
1105 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1106 {
1107  char buffer[32];
1108  if (time) {
1109  struct tm *ptm, tmbuf;
1110  time_t timet;
1111  if(time >= 2082844800)
1112  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1113  timet = time;
1114  ptm = gmtime_r(&timet, &tmbuf);
1115  if (!ptm) return;
1116  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1117  av_dict_set(metadata, "creation_time", buffer, 0);
1118  }
1119 }
1120 
1122 {
1123  AVStream *st;
1124  MOVStreamContext *sc;
1125  int version;
1126  char language[4] = {0};
1127  unsigned lang;
1128  int64_t creation_time;
1129 
1130  if (c->fc->nb_streams < 1)
1131  return 0;
1132  st = c->fc->streams[c->fc->nb_streams-1];
1133  sc = st->priv_data;
1134 
1135  if (sc->time_scale) {
1136  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1137  return AVERROR_INVALIDDATA;
1138  }
1139 
1140  version = avio_r8(pb);
1141  if (version > 1) {
1142  avpriv_request_sample(c->fc, "Version %d", version);
1143  return AVERROR_PATCHWELCOME;
1144  }
1145  avio_rb24(pb); /* flags */
1146  if (version == 1) {
1147  creation_time = avio_rb64(pb);
1148  avio_rb64(pb);
1149  } else {
1150  creation_time = avio_rb32(pb);
1151  avio_rb32(pb); /* modification time */
1152  }
1153  mov_metadata_creation_time(&st->metadata, creation_time);
1154 
1155  sc->time_scale = avio_rb32(pb);
1156  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1157 
1158  lang = avio_rb16(pb); /* language */
1159  if (ff_mov_lang_to_iso639(lang, language))
1160  av_dict_set(&st->metadata, "language", language, 0);
1161  avio_rb16(pb); /* quality */
1162 
1163  return 0;
1164 }
1165 
1167 {
1168  int64_t creation_time;
1169  int version = avio_r8(pb); /* version */
1170  avio_rb24(pb); /* flags */
1171 
1172  if (version == 1) {
1173  creation_time = avio_rb64(pb);
1174  avio_rb64(pb);
1175  } else {
1176  creation_time = avio_rb32(pb);
1177  avio_rb32(pb); /* modification time */
1178  }
1179  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1180  c->time_scale = avio_rb32(pb); /* time scale */
1181 
1182  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1183 
1184  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1185  // set the AVCodecContext duration because the duration of individual tracks
1186  // may be inaccurate
1187  if (c->time_scale > 0 && !c->trex_data)
1189  avio_rb32(pb); /* preferred scale */
1190 
1191  avio_rb16(pb); /* preferred volume */
1192 
1193  avio_skip(pb, 10); /* reserved */
1194 
1195  avio_skip(pb, 36); /* display matrix */
1196 
1197  avio_rb32(pb); /* preview time */
1198  avio_rb32(pb); /* preview duration */
1199  avio_rb32(pb); /* poster time */
1200  avio_rb32(pb); /* selection time */
1201  avio_rb32(pb); /* selection duration */
1202  avio_rb32(pb); /* current time */
1203  avio_rb32(pb); /* next track ID */
1204 
1205  return 0;
1206 }
1207 
1209 {
1210  AVStream *st;
1211  int little_endian;
1212 
1213  if (c->fc->nb_streams < 1)
1214  return 0;
1215  st = c->fc->streams[c->fc->nb_streams-1];
1216 
1217  little_endian = avio_rb16(pb) & 0xFF;
1218  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1219  if (little_endian == 1) {
1220  switch (st->codec->codec_id) {
1221  case AV_CODEC_ID_PCM_S24BE:
1223  break;
1224  case AV_CODEC_ID_PCM_S32BE:
1226  break;
1227  case AV_CODEC_ID_PCM_F32BE:
1229  break;
1230  case AV_CODEC_ID_PCM_F64BE:
1232  break;
1233  default:
1234  break;
1235  }
1236  }
1237  return 0;
1238 }
1239 
1241 {
1242  AVStream *st;
1243  char color_parameter_type[5] = { 0 };
1244  uint16_t color_primaries, color_trc, color_matrix;
1245  int ret;
1246 
1247  if (c->fc->nb_streams < 1)
1248  return 0;
1249  st = c->fc->streams[c->fc->nb_streams - 1];
1250 
1251  ret = ffio_read_size(pb, color_parameter_type, 4);
1252  if (ret < 0)
1253  return ret;
1254  if (strncmp(color_parameter_type, "nclx", 4) &&
1255  strncmp(color_parameter_type, "nclc", 4)) {
1256  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1257  color_parameter_type);
1258  return 0;
1259  }
1260 
1261  color_primaries = avio_rb16(pb);
1262  color_trc = avio_rb16(pb);
1263  color_matrix = avio_rb16(pb);
1264 
1265  av_log(c->fc, AV_LOG_TRACE,
1266  "%s: pri %d trc %d matrix %d",
1267  color_parameter_type, color_primaries, color_trc, color_matrix);
1268 
1269  if (!strncmp(color_parameter_type, "nclx", 4)) {
1270  uint8_t color_range = avio_r8(pb) >> 7;
1271  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1272  if (color_range)
1274  else
1276  /* 14496-12 references JPEG XR specs (rather than the more complete
1277  * 23001-8) so some adjusting is required */
1278  if (color_primaries >= AVCOL_PRI_FILM)
1279  color_primaries = AVCOL_PRI_UNSPECIFIED;
1280  if ((color_trc >= AVCOL_TRC_LINEAR &&
1281  color_trc <= AVCOL_TRC_LOG_SQRT) ||
1282  color_trc >= AVCOL_TRC_BT2020_10)
1283  color_trc = AVCOL_TRC_UNSPECIFIED;
1284  if (color_matrix >= AVCOL_SPC_BT2020_NCL)
1285  color_matrix = AVCOL_SPC_UNSPECIFIED;
1286  st->codec->color_primaries = color_primaries;
1287  st->codec->color_trc = color_trc;
1288  st->codec->colorspace = color_matrix;
1289  } else if (!strncmp(color_parameter_type, "nclc", 4)) {
1290  /* color primaries, Table 4-4 */
1291  switch (color_primaries) {
1292  case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
1293  case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
1294  case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
1295  }
1296  /* color transfer, Table 4-5 */
1297  switch (color_trc) {
1298  case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
1299  case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
1300  }
1301  /* color matrix, Table 4-6 */
1302  switch (color_matrix) {
1303  case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
1304  case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
1305  case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
1306  }
1307  }
1308  av_log(c->fc, AV_LOG_TRACE, "\n");
1309 
1310  return 0;
1311 }
1312 
1314 {
1315  AVStream *st;
1316  unsigned mov_field_order;
1317  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1318 
1319  if (c->fc->nb_streams < 1) // will happen with jp2 files
1320  return 0;
1321  st = c->fc->streams[c->fc->nb_streams-1];
1322  if (atom.size < 2)
1323  return AVERROR_INVALIDDATA;
1324  mov_field_order = avio_rb16(pb);
1325  if ((mov_field_order & 0xFF00) == 0x0100)
1326  decoded_field_order = AV_FIELD_PROGRESSIVE;
1327  else if ((mov_field_order & 0xFF00) == 0x0200) {
1328  switch (mov_field_order & 0xFF) {
1329  case 0x01: decoded_field_order = AV_FIELD_TT;
1330  break;
1331  case 0x06: decoded_field_order = AV_FIELD_BB;
1332  break;
1333  case 0x09: decoded_field_order = AV_FIELD_TB;
1334  break;
1335  case 0x0E: decoded_field_order = AV_FIELD_BT;
1336  break;
1337  }
1338  }
1339  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1340  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1341  }
1342  st->codec->field_order = decoded_field_order;
1343 
1344  return 0;
1345 }
1346 
1348 {
1349  int err = 0;
1350  uint64_t size = (uint64_t)codec->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1351  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1352  return AVERROR_INVALIDDATA;
1353  if ((err = av_reallocp(&codec->extradata, size)) < 0) {
1354  codec->extradata_size = 0;
1355  return err;
1356  }
1358  return 0;
1359 }
1360 
1361 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1363  AVCodecContext *codec, uint8_t *buf)
1364 {
1365  int64_t result = atom.size;
1366  int err;
1367 
1368  AV_WB32(buf , atom.size + 8);
1369  AV_WL32(buf + 4, atom.type);
1370  err = ffio_read_size(pb, buf + 8, atom.size);
1371  if (err < 0) {
1372  codec->extradata_size -= atom.size;
1373  return err;
1374  } else if (err < atom.size) {
1375  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1376  codec->extradata_size -= atom.size - err;
1377  result = err;
1378  }
1379  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1380  return result;
1381 }
1382 
1383 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1385  enum AVCodecID codec_id)
1386 {
1387  AVStream *st;
1388  uint64_t original_size;
1389  int err;
1390 
1391  if (c->fc->nb_streams < 1) // will happen with jp2 files
1392  return 0;
1393  st = c->fc->streams[c->fc->nb_streams-1];
1394 
1395  if (st->codec->codec_id != codec_id)
1396  return 0; /* unexpected codec_id - don't mess with extradata */
1397 
1398  original_size = st->codec->extradata_size;
1399  err = mov_realloc_extradata(st->codec, atom);
1400  if (err)
1401  return err;
1402 
1403  err = mov_read_atom_into_extradata(c, pb, atom, st->codec, st->codec->extradata + original_size);
1404  if (err < 0)
1405  return err;
1406  return 0; // Note: this is the original behavior to ignore truncation.
1407 }
1408 
1409 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1411 {
1412  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1413 }
1414 
1416 {
1417  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1418 }
1419 
1421 {
1422  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1423 }
1424 
1426 {
1427  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1428 }
1429 
1431 {
1432  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1433  if(ret == 0)
1434  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1435  return ret;
1436 }
1437 
1439 {
1440  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1441 
1442  if (!ret && c->fc->nb_streams >= 1) {
1443  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1444  if (avctx->extradata_size >= 40) {
1445  avctx->height = AV_RB16(&avctx->extradata[36]);
1446  avctx->width = AV_RB16(&avctx->extradata[38]);
1447  }
1448  }
1449  return ret;
1450 }
1451 
1453 {
1454  if (c->fc->nb_streams >= 1) {
1455  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1456  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1457  codec->codec_id == AV_CODEC_ID_H264 &&
1458  atom.size > 11) {
1459  avio_skip(pb, 10);
1460  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1461  if (avio_rb16(pb) == 0xd4d)
1462  codec->width = 1440;
1463  return 0;
1464  }
1465  }
1466 
1467  return mov_read_avid(c, pb, atom);
1468 }
1469 
1471 {
1472  int ret = 0;
1473  int length = 0;
1474  uint64_t original_size;
1475  if (c->fc->nb_streams >= 1) {
1476  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1477  if (codec->codec_id == AV_CODEC_ID_H264)
1478  return 0;
1479  if (atom.size == 16) {
1480  original_size = codec->extradata_size;
1481  ret = mov_realloc_extradata(codec, atom);
1482  if (!ret) {
1483  length = mov_read_atom_into_extradata(c, pb, atom, codec, codec->extradata + original_size);
1484  if (length == atom.size) {
1485  const uint8_t range_value = codec->extradata[original_size + 19];
1486  switch (range_value) {
1487  case 1:
1488  codec->color_range = AVCOL_RANGE_MPEG;
1489  break;
1490  case 2:
1491  codec->color_range = AVCOL_RANGE_JPEG;
1492  break;
1493  default:
1494  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1495  break;
1496  }
1497  ff_dlog(c, "color_range: %d\n", codec->color_range);
1498  } else {
1499  /* For some reason the whole atom was not added to the extradata */
1500  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1501  }
1502  } else {
1503  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1504  }
1505  } else {
1506  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1507  }
1508  }
1509 
1510  return ret;
1511 }
1512 
1514 {
1515  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1516 }
1517 
1519 {
1520  AVStream *st;
1521  int ret;
1522 
1523  if (c->fc->nb_streams < 1)
1524  return 0;
1525  st = c->fc->streams[c->fc->nb_streams-1];
1526 
1527  if ((uint64_t)atom.size > (1<<30))
1528  return AVERROR_INVALIDDATA;
1529 
1530  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1531  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1532  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1533  // pass all frma atom to codec, needed at least for QDMC and QDM2
1534  av_freep(&st->codec->extradata);
1535  ret = ff_get_extradata(st->codec, pb, atom.size);
1536  if (ret < 0)
1537  return ret;
1538  } else if (atom.size > 8) { /* to read frma, esds atoms */
1539  if (st->codec->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1540  uint64_t buffer;
1541  ret = ffio_ensure_seekback(pb, 8);
1542  if (ret < 0)
1543  return ret;
1544  buffer = avio_rb64(pb);
1545  atom.size -= 8;
1546  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1547  && buffer >> 32 <= atom.size
1548  && buffer >> 32 >= 8) {
1549  avio_skip(pb, -8);
1550  atom.size += 8;
1551  } else if (!st->codec->extradata_size) {
1552 #define ALAC_EXTRADATA_SIZE 36
1554  if (!st->codec->extradata)
1555  return AVERROR(ENOMEM);
1558  AV_WB32(st->codec->extradata + 4, MKTAG('a','l','a','c'));
1559  AV_WB64(st->codec->extradata + 12, buffer);
1560  avio_read(pb, st->codec->extradata + 20, 16);
1561  avio_skip(pb, atom.size - 24);
1562  return 0;
1563  }
1564  }
1565  if ((ret = mov_read_default(c, pb, atom)) < 0)
1566  return ret;
1567  } else
1568  avio_skip(pb, atom.size);
1569  return 0;
1570 }
1571 
1572 /**
1573  * This function reads atom content and puts data in extradata without tag
1574  * nor size unlike mov_read_extradata.
1575  */
1577 {
1578  AVStream *st;
1579  int ret;
1580 
1581  if (c->fc->nb_streams < 1)
1582  return 0;
1583  st = c->fc->streams[c->fc->nb_streams-1];
1584 
1585  if ((uint64_t)atom.size > (1<<30))
1586  return AVERROR_INVALIDDATA;
1587 
1588  if (atom.size >= 10) {
1589  // Broken files created by legacy versions of libavformat will
1590  // wrap a whole fiel atom inside of a glbl atom.
1591  unsigned size = avio_rb32(pb);
1592  unsigned type = avio_rl32(pb);
1593  avio_seek(pb, -8, SEEK_CUR);
1594  if (type == MKTAG('f','i','e','l') && size == atom.size)
1595  return mov_read_default(c, pb, atom);
1596  }
1597  if (st->codec->extradata_size > 1 && st->codec->extradata) {
1598  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1599  return 0;
1600  }
1601  av_freep(&st->codec->extradata);
1602  ret = ff_get_extradata(st->codec, pb, atom.size);
1603  if (ret < 0)
1604  return ret;
1605 
1606  return 0;
1607 }
1608 
1610 {
1611  AVStream *st;
1612  uint8_t profile_level;
1613  int ret;
1614 
1615  if (c->fc->nb_streams < 1)
1616  return 0;
1617  st = c->fc->streams[c->fc->nb_streams-1];
1618 
1619  if (atom.size >= (1<<28) || atom.size < 7)
1620  return AVERROR_INVALIDDATA;
1621 
1622  profile_level = avio_r8(pb);
1623  if ((profile_level & 0xf0) != 0xc0)
1624  return 0;
1625 
1626  avio_seek(pb, 6, SEEK_CUR);
1627  av_freep(&st->codec->extradata);
1628  ret = ff_get_extradata(st->codec, pb, atom.size - 7);
1629  if (ret < 0)
1630  return ret;
1631 
1632  return 0;
1633 }
1634 
1635 /**
1636  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1637  * but can have extradata appended at the end after the 40 bytes belonging
1638  * to the struct.
1639  */
1641 {
1642  AVStream *st;
1643  int ret;
1644 
1645  if (c->fc->nb_streams < 1)
1646  return 0;
1647  if (atom.size <= 40)
1648  return 0;
1649  st = c->fc->streams[c->fc->nb_streams-1];
1650 
1651  if ((uint64_t)atom.size > (1<<30))
1652  return AVERROR_INVALIDDATA;
1653 
1654  avio_skip(pb, 40);
1655  av_freep(&st->codec->extradata);
1656  ret = ff_get_extradata(st->codec, pb, atom.size - 40);
1657  if (ret < 0)
1658  return ret;
1659 
1660  return 0;
1661 }
1662 
1664 {
1665  AVStream *st;
1666  MOVStreamContext *sc;
1667  unsigned int i, entries;
1668 
1669  if (c->fc->nb_streams < 1)
1670  return 0;
1671  st = c->fc->streams[c->fc->nb_streams-1];
1672  sc = st->priv_data;
1673 
1674  avio_r8(pb); /* version */
1675  avio_rb24(pb); /* flags */
1676 
1677  entries = avio_rb32(pb);
1678 
1679  if (!entries)
1680  return 0;
1681 
1682  if (sc->chunk_offsets)
1683  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1684  av_free(sc->chunk_offsets);
1685  sc->chunk_count = 0;
1686  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1687  if (!sc->chunk_offsets)
1688  return AVERROR(ENOMEM);
1689  sc->chunk_count = entries;
1690 
1691  if (atom.type == MKTAG('s','t','c','o'))
1692  for (i = 0; i < entries && !pb->eof_reached; i++)
1693  sc->chunk_offsets[i] = avio_rb32(pb);
1694  else if (atom.type == MKTAG('c','o','6','4'))
1695  for (i = 0; i < entries && !pb->eof_reached; i++)
1696  sc->chunk_offsets[i] = avio_rb64(pb);
1697  else
1698  return AVERROR_INVALIDDATA;
1699 
1700  sc->chunk_count = i;
1701 
1702  if (pb->eof_reached)
1703  return AVERROR_EOF;
1704 
1705  return 0;
1706 }
1707 
1708 /**
1709  * Compute codec id for 'lpcm' tag.
1710  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1711  */
1713 {
1714  /* lpcm flags:
1715  * 0x1 = float
1716  * 0x2 = big-endian
1717  * 0x4 = signed
1718  */
1719  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1720 }
1721 
1722 static int mov_codec_id(AVStream *st, uint32_t format)
1723 {
1724  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1725 
1726  if (id <= 0 &&
1727  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1728  (format & 0xFFFF) == 'T' + ('S' << 8)))
1729  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1730 
1731  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1733  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1734  /* skip old asf mpeg4 tag */
1735  format && format != MKTAG('m','p','4','s')) {
1737  if (id <= 0)
1738  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1739  if (id > 0)
1741  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1743  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1745  if (id > 0)
1747  }
1748  }
1749 
1750  st->codec->codec_tag = format;
1751 
1752  return id;
1753 }
1754 
1756  AVStream *st, MOVStreamContext *sc)
1757 {
1758  uint8_t codec_name[32];
1759  int64_t stsd_start;
1760  unsigned int len;
1761 
1762  /* The first 16 bytes of the video sample description are already
1763  * read in ff_mov_read_stsd_entries() */
1764  stsd_start = avio_tell(pb) - 16;
1765 
1766  avio_rb16(pb); /* version */
1767  avio_rb16(pb); /* revision level */
1768  avio_rb32(pb); /* vendor */
1769  avio_rb32(pb); /* temporal quality */
1770  avio_rb32(pb); /* spatial quality */
1771 
1772  st->codec->width = avio_rb16(pb); /* width */
1773  st->codec->height = avio_rb16(pb); /* height */
1774 
1775  avio_rb32(pb); /* horiz resolution */
1776  avio_rb32(pb); /* vert resolution */
1777  avio_rb32(pb); /* data size, always 0 */
1778  avio_rb16(pb); /* frames per samples */
1779 
1780  len = avio_r8(pb); /* codec name, pascal string */
1781  if (len > 31)
1782  len = 31;
1783  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1784  if (len < 31)
1785  avio_skip(pb, 31 - len);
1786 
1787  if (codec_name[0])
1788  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1789 
1790  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1791  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1792  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1793  st->codec->width &= ~1;
1794  st->codec->height &= ~1;
1795  }
1796  /* Flash Media Server uses tag H263 with Sorenson Spark */
1797  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1798  !memcmp(codec_name, "Sorenson H263", 13))
1800 
1801  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1802 
1803  avio_seek(pb, stsd_start, SEEK_SET);
1804 
1805  if (ff_get_qtpalette(st->codec->codec_id, pb, sc->palette)) {
1806  st->codec->bits_per_coded_sample &= 0x1F;
1807  sc->has_palette = 1;
1808  }
1809 }
1810 
1812  AVStream *st, MOVStreamContext *sc)
1813 {
1814  int bits_per_sample, flags;
1815  uint16_t version = avio_rb16(pb);
1816  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1817 
1818  avio_rb16(pb); /* revision level */
1819  avio_rb32(pb); /* vendor */
1820 
1821  st->codec->channels = avio_rb16(pb); /* channel count */
1822  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1823  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codec->channels);
1824 
1825  sc->audio_cid = avio_rb16(pb);
1826  avio_rb16(pb); /* packet size = 0 */
1827 
1828  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1829 
1830  // Read QT version 1 fields. In version 0 these do not exist.
1831  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1832  if (!c->isom ||
1833  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1834 
1835  if (version == 1) {
1836  sc->samples_per_frame = avio_rb32(pb);
1837  avio_rb32(pb); /* bytes per packet */
1838  sc->bytes_per_frame = avio_rb32(pb);
1839  avio_rb32(pb); /* bytes per sample */
1840  } else if (version == 2) {
1841  avio_rb32(pb); /* sizeof struct only */
1843  st->codec->channels = avio_rb32(pb);
1844  avio_rb32(pb); /* always 0x7F000000 */
1846 
1847  flags = avio_rb32(pb); /* lpcm format specific flag */
1848  sc->bytes_per_frame = avio_rb32(pb);
1849  sc->samples_per_frame = avio_rb32(pb);
1850  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1851  st->codec->codec_id =
1853  flags);
1854  }
1855  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1856  /* can't correctly handle variable sized packet as audio unit */
1857  switch (st->codec->codec_id) {
1858  case AV_CODEC_ID_MP2:
1859  case AV_CODEC_ID_MP3:
1861  break;
1862  }
1863  }
1864  }
1865 
1866  if (sc->format == 0) {
1867  if (st->codec->bits_per_coded_sample == 8)
1868  st->codec->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1869  else if (st->codec->bits_per_coded_sample == 16)
1870  st->codec->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1871  }
1872 
1873  switch (st->codec->codec_id) {
1874  case AV_CODEC_ID_PCM_S8:
1875  case AV_CODEC_ID_PCM_U8:
1876  if (st->codec->bits_per_coded_sample == 16)
1878  break;
1879  case AV_CODEC_ID_PCM_S16LE:
1880  case AV_CODEC_ID_PCM_S16BE:
1881  if (st->codec->bits_per_coded_sample == 8)
1883  else if (st->codec->bits_per_coded_sample == 24)
1884  st->codec->codec_id =
1887  else if (st->codec->bits_per_coded_sample == 32)
1888  st->codec->codec_id =
1891  break;
1892  /* set values for old format before stsd version 1 appeared */
1893  case AV_CODEC_ID_MACE3:
1894  sc->samples_per_frame = 6;
1895  sc->bytes_per_frame = 2 * st->codec->channels;
1896  break;
1897  case AV_CODEC_ID_MACE6:
1898  sc->samples_per_frame = 6;
1899  sc->bytes_per_frame = 1 * st->codec->channels;
1900  break;
1902  sc->samples_per_frame = 64;
1903  sc->bytes_per_frame = 34 * st->codec->channels;
1904  break;
1905  case AV_CODEC_ID_GSM:
1906  sc->samples_per_frame = 160;
1907  sc->bytes_per_frame = 33;
1908  break;
1909  default:
1910  break;
1911  }
1912 
1913  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1914  if (bits_per_sample) {
1915  st->codec->bits_per_coded_sample = bits_per_sample;
1916  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1917  }
1918 }
1919 
1921  AVStream *st, MOVStreamContext *sc,
1922  int64_t size)
1923 {
1924  // ttxt stsd contains display flags, justification, background
1925  // color, fonts, and default styles, so fake an atom to read it
1926  MOVAtom fake_atom = { .size = size };
1927  // mp4s contains a regular esds atom
1928  if (st->codec->codec_tag != AV_RL32("mp4s"))
1929  mov_read_glbl(c, pb, fake_atom);
1930  st->codec->width = sc->width;
1931  st->codec->height = sc->height;
1932 }
1933 
1934 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1935 {
1936  uint8_t r, g, b;
1937  int y, cb, cr;
1938 
1939  y = (ycbcr >> 16) & 0xFF;
1940  cr = (ycbcr >> 8) & 0xFF;
1941  cb = ycbcr & 0xFF;
1942 
1943  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
1944  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
1945  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
1946 
1947  return (r << 16) | (g << 8) | b;
1948 }
1949 
1951 {
1952  char buf[256] = {0};
1953  uint8_t *src = st->codec->extradata;
1954  int i;
1955 
1956  if (st->codec->extradata_size != 64)
1957  return 0;
1958 
1959  if (st->codec->width > 0 && st->codec->height > 0)
1960  snprintf(buf, sizeof(buf), "size: %dx%d\n",
1961  st->codec->width, st->codec->height);
1962  av_strlcat(buf, "palette: ", sizeof(buf));
1963 
1964  for (i = 0; i < 16; i++) {
1965  uint32_t yuv = AV_RB32(src + i * 4);
1966  uint32_t rgba = yuv_to_rgba(yuv);
1967 
1968  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1969  }
1970 
1971  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1972  return 0;
1973 
1974  av_freep(&st->codec->extradata);
1975  st->codec->extradata_size = 0;
1977  if (!st->codec->extradata)
1978  return AVERROR(ENOMEM);
1979  st->codec->extradata_size = strlen(buf);
1980  memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1981 
1982  return 0;
1983 }
1984 
1986  AVStream *st, MOVStreamContext *sc,
1987  int64_t size)
1988 {
1989  int ret;
1990 
1991  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1992  if ((int)size != size)
1993  return AVERROR(ENOMEM);
1994 
1995  ret = ff_get_extradata(st->codec, pb, size);
1996  if (ret < 0)
1997  return ret;
1998  if (size > 16) {
1999  MOVStreamContext *tmcd_ctx = st->priv_data;
2000  int val;
2001  val = AV_RB32(st->codec->extradata + 4);
2002  tmcd_ctx->tmcd_flags = val;
2003  if (val & 1)
2005  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
2006  st->codec->time_base.num = 1;
2007  /* adjust for per frame dur in counter mode */
2008  if (tmcd_ctx->tmcd_flags & 0x0008) {
2009  int timescale = AV_RB32(st->codec->extradata + 8);
2010  int framedur = AV_RB32(st->codec->extradata + 12);
2011  st->codec->time_base.den *= timescale;
2012  st->codec->time_base.num *= framedur;
2013  }
2014  if (size > 30) {
2015  uint32_t len = AV_RB32(st->codec->extradata + 18); /* name atom length */
2016  uint32_t format = AV_RB32(st->codec->extradata + 22);
2017  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2018  uint16_t str_size = AV_RB16(st->codec->extradata + 26); /* string length */
2019  if (str_size > 0 && size >= (int)str_size + 26) {
2020  char *reel_name = av_malloc(str_size + 1);
2021  if (!reel_name)
2022  return AVERROR(ENOMEM);
2023  memcpy(reel_name, st->codec->extradata + 30, str_size);
2024  reel_name[str_size] = 0; /* Add null terminator */
2025  /* don't add reel_name if emtpy string */
2026  if (*reel_name == 0) {
2027  av_free(reel_name);
2028  } else {
2029  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2030  }
2031  }
2032  }
2033  }
2034  }
2035  } else {
2036  /* other codec type, just skip (rtp, mp4s ...) */
2037  avio_skip(pb, size);
2038  }
2039  return 0;
2040 }
2041 
2043  AVStream *st, MOVStreamContext *sc)
2044 {
2045  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2046  !st->codec->sample_rate && sc->time_scale > 1)
2047  st->codec->sample_rate = sc->time_scale;
2048 
2049  /* special codec parameters handling */
2050  switch (st->codec->codec_id) {
2051 #if CONFIG_DV_DEMUXER
2052  case AV_CODEC_ID_DVAUDIO:
2054  if (!c->dv_fctx) {
2055  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2056  return AVERROR(ENOMEM);
2057  }
2059  if (!c->dv_demux) {
2060  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2061  return AVERROR(ENOMEM);
2062  }
2063  sc->dv_audio_container = 1;
2065  break;
2066 #endif
2067  /* no ifdef since parameters are always those */
2068  case AV_CODEC_ID_QCELP:
2069  st->codec->channels = 1;
2070  // force sample rate for qcelp when not stored in mov
2071  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
2072  st->codec->sample_rate = 8000;
2073  // FIXME: Why is the following needed for some files?
2074  sc->samples_per_frame = 160;
2075  if (!sc->bytes_per_frame)
2076  sc->bytes_per_frame = 35;
2077  break;
2078  case AV_CODEC_ID_AMR_NB:
2079  st->codec->channels = 1;
2080  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2081  st->codec->sample_rate = 8000;
2082  break;
2083  case AV_CODEC_ID_AMR_WB:
2084  st->codec->channels = 1;
2085  st->codec->sample_rate = 16000;
2086  break;
2087  case AV_CODEC_ID_MP2:
2088  case AV_CODEC_ID_MP3:
2089  /* force type after stsd for m1a hdlr */
2091  break;
2092  case AV_CODEC_ID_GSM:
2093  case AV_CODEC_ID_ADPCM_MS:
2095  case AV_CODEC_ID_ILBC:
2096  case AV_CODEC_ID_MACE3:
2097  case AV_CODEC_ID_MACE6:
2098  case AV_CODEC_ID_QDM2:
2099  st->codec->block_align = sc->bytes_per_frame;
2100  break;
2101  case AV_CODEC_ID_ALAC:
2102  if (st->codec->extradata_size == 36) {
2103  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
2104  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
2105  }
2106  break;
2107  case AV_CODEC_ID_AC3:
2108  case AV_CODEC_ID_EAC3:
2110  case AV_CODEC_ID_VC1:
2112  break;
2113  default:
2114  break;
2115  }
2116  return 0;
2117 }
2118 
2120  int codec_tag, int format,
2121  int64_t size)
2122 {
2123  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2124 
2125  if (codec_tag &&
2126  (codec_tag != format &&
2127  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2128  : codec_tag != MKTAG('j','p','e','g')))) {
2129  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2130  * export it as a separate AVStream but this needs a few changes
2131  * in the MOV demuxer, patch welcome. */
2132 
2133  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2134  avio_skip(pb, size);
2135  return 1;
2136  }
2137  if ( codec_tag == AV_RL32("avc1") ||
2138  codec_tag == AV_RL32("hvc1") ||
2139  codec_tag == AV_RL32("hev1")
2140  )
2141  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
2142 
2143  return 0;
2144 }
2145 
2147 {
2148  AVStream *st;
2149  MOVStreamContext *sc;
2150  int pseudo_stream_id;
2151 
2152  if (c->fc->nb_streams < 1)
2153  return 0;
2154  st = c->fc->streams[c->fc->nb_streams-1];
2155  sc = st->priv_data;
2156 
2157  for (pseudo_stream_id = 0;
2158  pseudo_stream_id < entries && !pb->eof_reached;
2159  pseudo_stream_id++) {
2160  //Parsing Sample description table
2161  enum AVCodecID id;
2162  int ret, dref_id = 1;
2163  MOVAtom a = { AV_RL32("stsd") };
2164  int64_t start_pos = avio_tell(pb);
2165  int64_t size = avio_rb32(pb); /* size */
2166  uint32_t format = avio_rl32(pb); /* data format */
2167 
2168  if (size >= 16) {
2169  avio_rb32(pb); /* reserved */
2170  avio_rb16(pb); /* reserved */
2171  dref_id = avio_rb16(pb);
2172  }else if (size <= 7){
2173  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
2174  return AVERROR_INVALIDDATA;
2175  }
2176 
2177  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
2178  size - (avio_tell(pb) - start_pos)))
2179  continue;
2180 
2181  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
2182  sc->dref_id= dref_id;
2183  sc->format = format;
2184 
2185  id = mov_codec_id(st, format);
2186 
2187  av_log(c->fc, AV_LOG_TRACE,
2188  "size=%"PRId64" 4CC= %c%c%c%c/0x%08x codec_type=%d\n", size,
2189  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
2190  (format >> 24) & 0xff, format, st->codec->codec_type);
2191 
2192  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
2193  st->codec->codec_id = id;
2194  mov_parse_stsd_video(c, pb, st, sc);
2195  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
2196  st->codec->codec_id = id;
2197  mov_parse_stsd_audio(c, pb, st, sc);
2198  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
2199  st->codec->codec_id = id;
2200  mov_parse_stsd_subtitle(c, pb, st, sc,
2201  size - (avio_tell(pb) - start_pos));
2202  } else {
2203  ret = mov_parse_stsd_data(c, pb, st, sc,
2204  size - (avio_tell(pb) - start_pos));
2205  if (ret < 0)
2206  return ret;
2207  }
2208  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2209  a.size = size - (avio_tell(pb) - start_pos);
2210  if (a.size > 8) {
2211  if ((ret = mov_read_default(c, pb, a)) < 0)
2212  return ret;
2213  } else if (a.size > 0)
2214  avio_skip(pb, a.size);
2215  }
2216 
2217  if (pb->eof_reached)
2218  return AVERROR_EOF;
2219 
2220  return mov_finalize_stsd_codec(c, pb, st, sc);
2221 }
2222 
2224 {
2225  int entries;
2226 
2227  avio_r8(pb); /* version */
2228  avio_rb24(pb); /* flags */
2229  entries = avio_rb32(pb);
2230 
2231  return ff_mov_read_stsd_entries(c, pb, entries);
2232 }
2233 
2235 {
2236  AVStream *st;
2237  MOVStreamContext *sc;
2238  unsigned int i, entries;
2239 
2240  if (c->fc->nb_streams < 1)
2241  return 0;
2242  st = c->fc->streams[c->fc->nb_streams-1];
2243  sc = st->priv_data;
2244 
2245  avio_r8(pb); /* version */
2246  avio_rb24(pb); /* flags */
2247 
2248  entries = avio_rb32(pb);
2249 
2250  av_log(c->fc, AV_LOG_TRACE, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
2251 
2252  if (!entries)
2253  return 0;
2254  if (sc->stsc_data)
2255  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2256  av_free(sc->stsc_data);
2257  sc->stsc_count = 0;
2258  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2259  if (!sc->stsc_data)
2260  return AVERROR(ENOMEM);
2261 
2262  for (i = 0; i < entries && !pb->eof_reached; i++) {
2263  sc->stsc_data[i].first = avio_rb32(pb);
2264  sc->stsc_data[i].count = avio_rb32(pb);
2265  sc->stsc_data[i].id = avio_rb32(pb);
2266  }
2267 
2268  sc->stsc_count = i;
2269 
2270  if (pb->eof_reached)
2271  return AVERROR_EOF;
2272 
2273  return 0;
2274 }
2275 
2277 {
2278  AVStream *st;
2279  MOVStreamContext *sc;
2280  unsigned i, entries;
2281 
2282  if (c->fc->nb_streams < 1)
2283  return 0;
2284  st = c->fc->streams[c->fc->nb_streams-1];
2285  sc = st->priv_data;
2286 
2287  avio_rb32(pb); // version + flags
2288 
2289  entries = avio_rb32(pb);
2290  if (sc->stps_data)
2291  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2292  av_free(sc->stps_data);
2293  sc->stps_count = 0;
2294  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2295  if (!sc->stps_data)
2296  return AVERROR(ENOMEM);
2297 
2298  for (i = 0; i < entries && !pb->eof_reached; i++) {
2299  sc->stps_data[i] = avio_rb32(pb);
2300  //av_log(c->fc, AV_LOG_TRACE, "stps %d\n", sc->stps_data[i]);
2301  }
2302 
2303  sc->stps_count = i;
2304 
2305  if (pb->eof_reached)
2306  return AVERROR_EOF;
2307 
2308  return 0;
2309 }
2310 
2312 {
2313  AVStream *st;
2314  MOVStreamContext *sc;
2315  unsigned int i, entries;
2316 
2317  if (c->fc->nb_streams < 1)
2318  return 0;
2319  st = c->fc->streams[c->fc->nb_streams-1];
2320  sc = st->priv_data;
2321 
2322  avio_r8(pb); /* version */
2323  avio_rb24(pb); /* flags */
2324 
2325  entries = avio_rb32(pb);
2326 
2327  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %d\n", entries);
2328 
2329  if (!entries)
2330  {
2331  sc->keyframe_absent = 1;
2332  if (!st->need_parsing && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2334  return 0;
2335  }
2336  if (sc->keyframes)
2337  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2338  if (entries >= UINT_MAX / sizeof(int))
2339  return AVERROR_INVALIDDATA;
2340  av_freep(&sc->keyframes);
2341  sc->keyframe_count = 0;
2342  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2343  if (!sc->keyframes)
2344  return AVERROR(ENOMEM);
2345 
2346  for (i = 0; i < entries && !pb->eof_reached; i++) {
2347  sc->keyframes[i] = avio_rb32(pb);
2348  //av_log(c->fc, AV_LOG_TRACE, "keyframes[]=%d\n", sc->keyframes[i]);
2349  }
2350 
2351  sc->keyframe_count = i;
2352 
2353  if (pb->eof_reached)
2354  return AVERROR_EOF;
2355 
2356  return 0;
2357 }
2358 
2360 {
2361  AVStream *st;
2362  MOVStreamContext *sc;
2363  unsigned int i, entries, sample_size, field_size, num_bytes;
2364  GetBitContext gb;
2365  unsigned char* buf;
2366  int ret;
2367 
2368  if (c->fc->nb_streams < 1)
2369  return 0;
2370  st = c->fc->streams[c->fc->nb_streams-1];
2371  sc = st->priv_data;
2372 
2373  avio_r8(pb); /* version */
2374  avio_rb24(pb); /* flags */
2375 
2376  if (atom.type == MKTAG('s','t','s','z')) {
2377  sample_size = avio_rb32(pb);
2378  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2379  sc->sample_size = sample_size;
2380  sc->stsz_sample_size = sample_size;
2381  field_size = 32;
2382  } else {
2383  sample_size = 0;
2384  avio_rb24(pb); /* reserved */
2385  field_size = avio_r8(pb);
2386  }
2387  entries = avio_rb32(pb);
2388 
2389  av_log(c->fc, AV_LOG_TRACE, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2390 
2391  sc->sample_count = entries;
2392  if (sample_size)
2393  return 0;
2394 
2395  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2396  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2397  return AVERROR_INVALIDDATA;
2398  }
2399 
2400  if (!entries)
2401  return 0;
2402  if (entries >= (UINT_MAX - 4) / field_size)
2403  return AVERROR_INVALIDDATA;
2404  if (sc->sample_sizes)
2405  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2406  av_free(sc->sample_sizes);
2407  sc->sample_count = 0;
2408  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2409  if (!sc->sample_sizes)
2410  return AVERROR(ENOMEM);
2411 
2412  num_bytes = (entries*field_size+4)>>3;
2413 
2414  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2415  if (!buf) {
2416  av_freep(&sc->sample_sizes);
2417  return AVERROR(ENOMEM);
2418  }
2419 
2420  ret = ffio_read_size(pb, buf, num_bytes);
2421  if (ret < 0) {
2422  av_freep(&sc->sample_sizes);
2423  av_free(buf);
2424  return ret;
2425  }
2426 
2427  init_get_bits(&gb, buf, 8*num_bytes);
2428 
2429  for (i = 0; i < entries && !pb->eof_reached; i++) {
2430  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2431  sc->data_size += sc->sample_sizes[i];
2432  }
2433 
2434  sc->sample_count = i;
2435 
2436  av_free(buf);
2437 
2438  if (pb->eof_reached)
2439  return AVERROR_EOF;
2440 
2441  return 0;
2442 }
2443 
2445 {
2446  AVStream *st;
2447  MOVStreamContext *sc;
2448  unsigned int i, entries;
2449  int64_t duration=0;
2450  int64_t total_sample_count=0;
2451 
2452  if (c->fc->nb_streams < 1)
2453  return 0;
2454  st = c->fc->streams[c->fc->nb_streams-1];
2455  sc = st->priv_data;
2456 
2457  avio_r8(pb); /* version */
2458  avio_rb24(pb); /* flags */
2459  entries = avio_rb32(pb);
2460 
2461  av_log(c->fc, AV_LOG_TRACE, "track[%i].stts.entries = %i\n",
2462  c->fc->nb_streams-1, entries);
2463 
2464  if (sc->stts_data)
2465  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2466  av_free(sc->stts_data);
2467  sc->stts_count = 0;
2468  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2469  if (!sc->stts_data)
2470  return AVERROR(ENOMEM);
2471 
2472  for (i = 0; i < entries && !pb->eof_reached; i++) {
2473  int sample_duration;
2474  int sample_count;
2475 
2476  sample_count=avio_rb32(pb);
2477  sample_duration = avio_rb32(pb);
2478 
2479  if (sample_count < 0) {
2480  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2481  return AVERROR_INVALIDDATA;
2482  }
2483  sc->stts_data[i].count= sample_count;
2484  sc->stts_data[i].duration= sample_duration;
2485 
2486  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2487  sample_count, sample_duration);
2488 
2489  if ( i+1 == entries
2490  && i
2491  && sample_count == 1
2492  && total_sample_count > 100
2493  && sample_duration/10 > duration / total_sample_count)
2494  sample_duration = duration / total_sample_count;
2495  duration+=(int64_t)sample_duration*sample_count;
2496  total_sample_count+=sample_count;
2497  }
2498 
2499  sc->stts_count = i;
2500 
2501  sc->duration_for_fps += duration;
2502  sc->nb_frames_for_fps += total_sample_count;
2503 
2504  if (pb->eof_reached)
2505  return AVERROR_EOF;
2506 
2507  st->nb_frames= total_sample_count;
2508  if (duration)
2509  st->duration= duration;
2510  sc->track_end = duration;
2511  return 0;
2512 }
2513 
2515 {
2516  if (duration < 0) {
2517  if (duration == INT_MIN) {
2518  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2519  duration++;
2520  }
2521  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2522  }
2523 }
2524 
2526 {
2527  AVStream *st;
2528  MOVStreamContext *sc;
2529  unsigned int i, entries;
2530 
2531  if (c->fc->nb_streams < 1)
2532  return 0;
2533  st = c->fc->streams[c->fc->nb_streams-1];
2534  sc = st->priv_data;
2535 
2536  avio_r8(pb); /* version */
2537  avio_rb24(pb); /* flags */
2538  entries = avio_rb32(pb);
2539 
2540  av_log(c->fc, AV_LOG_TRACE, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2541 
2542  if (!entries)
2543  return 0;
2544  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2545  return AVERROR_INVALIDDATA;
2546  av_freep(&sc->ctts_data);
2547  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2548  if (!sc->ctts_data)
2549  return AVERROR(ENOMEM);
2550 
2551  for (i = 0; i < entries && !pb->eof_reached; i++) {
2552  int count =avio_rb32(pb);
2553  int duration =avio_rb32(pb);
2554 
2555  sc->ctts_data[i].count = count;
2556  sc->ctts_data[i].duration= duration;
2557 
2558  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2559  count, duration);
2560 
2561  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2562  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2563  av_freep(&sc->ctts_data);
2564  sc->ctts_count = 0;
2565  return 0;
2566  }
2567 
2568  if (i+2<entries)
2569  mov_update_dts_shift(sc, duration);
2570  }
2571 
2572  sc->ctts_count = i;
2573 
2574  if (pb->eof_reached)
2575  return AVERROR_EOF;
2576 
2577  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2578 
2579  return 0;
2580 }
2581 
2583 {
2584  AVStream *st;
2585  MOVStreamContext *sc;
2586  unsigned int i, entries;
2587  uint8_t version;
2588  uint32_t grouping_type;
2589 
2590  if (c->fc->nb_streams < 1)
2591  return 0;
2592  st = c->fc->streams[c->fc->nb_streams-1];
2593  sc = st->priv_data;
2594 
2595  version = avio_r8(pb); /* version */
2596  avio_rb24(pb); /* flags */
2597  grouping_type = avio_rl32(pb);
2598  if (grouping_type != MKTAG( 'r','a','p',' '))
2599  return 0; /* only support 'rap ' grouping */
2600  if (version == 1)
2601  avio_rb32(pb); /* grouping_type_parameter */
2602 
2603  entries = avio_rb32(pb);
2604  if (!entries)
2605  return 0;
2606  if (sc->rap_group)
2607  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2608  av_free(sc->rap_group);
2609  sc->rap_group_count = 0;
2610  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2611  if (!sc->rap_group)
2612  return AVERROR(ENOMEM);
2613 
2614  for (i = 0; i < entries && !pb->eof_reached; i++) {
2615  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2616  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2617  }
2618 
2619  sc->rap_group_count = i;
2620 
2621  return pb->eof_reached ? AVERROR_EOF : 0;
2622 }
2623 
2624 static void mov_build_index(MOVContext *mov, AVStream *st)
2625 {
2626  MOVStreamContext *sc = st->priv_data;
2627  int64_t current_offset;
2628  int64_t current_dts = 0;
2629  unsigned int stts_index = 0;
2630  unsigned int stsc_index = 0;
2631  unsigned int stss_index = 0;
2632  unsigned int stps_index = 0;
2633  unsigned int i, j;
2634  uint64_t stream_size = 0;
2635 
2636  if (sc->elst_count) {
2637  int i, edit_start_index = 0, unsupported = 0;
2638  int64_t empty_duration = 0; // empty duration of the first edit list entry
2639  int64_t start_time = 0; // start time of the media
2640 
2641  for (i = 0; i < sc->elst_count; i++) {
2642  const MOVElst *e = &sc->elst_data[i];
2643  if (i == 0 && e->time == -1) {
2644  /* if empty, the first entry is the start time of the stream
2645  * relative to the presentation itself */
2646  empty_duration = e->duration;
2647  edit_start_index = 1;
2648  } else if (i == edit_start_index && e->time >= 0) {
2649  start_time = e->time;
2650  } else
2651  unsupported = 1;
2652  }
2653  if (unsupported)
2654  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
2655  "a/v desync might occur, patch welcome\n");
2656 
2657  /* adjust first dts according to edit list */
2658  if ((empty_duration || start_time) && mov->time_scale > 0) {
2659  if (empty_duration)
2660  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
2661  sc->time_offset = start_time - empty_duration;
2662  current_dts = -sc->time_offset;
2663  if (sc->ctts_count>0 && sc->stts_count>0 &&
2664  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2665  /* more than 16 frames delay, dts are likely wrong
2666  this happens with files created by iMovie */
2667  sc->wrong_dts = 1;
2668  st->codec->has_b_frames = 1;
2669  }
2670  }
2671  }
2672 
2673  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2674  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2675  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2676  unsigned int current_sample = 0;
2677  unsigned int stts_sample = 0;
2678  unsigned int sample_size;
2679  unsigned int distance = 0;
2680  unsigned int rap_group_index = 0;
2681  unsigned int rap_group_sample = 0;
2682  int64_t last_dts = 0;
2683  int64_t dts_correction = 0;
2684  int rap_group_present = sc->rap_group_count && sc->rap_group;
2685  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2686 
2687  current_dts -= sc->dts_shift;
2688  last_dts = current_dts;
2689 
2690  if (!sc->sample_count || st->nb_index_entries)
2691  return;
2692  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2693  return;
2695  st->nb_index_entries + sc->sample_count,
2696  sizeof(*st->index_entries)) < 0) {
2697  st->nb_index_entries = 0;
2698  return;
2699  }
2701 
2702  for (i = 0; i < sc->chunk_count; i++) {
2703  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2704  current_offset = sc->chunk_offsets[i];
2705  while (stsc_index + 1 < sc->stsc_count &&
2706  i + 1 == sc->stsc_data[stsc_index + 1].first)
2707  stsc_index++;
2708 
2709  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2710  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2711  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2712  sc->stsz_sample_size = sc->sample_size;
2713  }
2714  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2715  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2716  sc->stsz_sample_size = sc->sample_size;
2717  }
2718 
2719  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2720  int keyframe = 0;
2721  if (current_sample >= sc->sample_count) {
2722  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2723  return;
2724  }
2725 
2726  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2727  keyframe = 1;
2728  if (stss_index + 1 < sc->keyframe_count)
2729  stss_index++;
2730  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2731  keyframe = 1;
2732  if (stps_index + 1 < sc->stps_count)
2733  stps_index++;
2734  }
2735  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2736  if (sc->rap_group[rap_group_index].index > 0)
2737  keyframe = 1;
2738  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2739  rap_group_sample = 0;
2740  rap_group_index++;
2741  }
2742  }
2743  if (sc->keyframe_absent
2744  && !sc->stps_count
2745  && !rap_group_present
2746  && (st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2747  keyframe = 1;
2748  if (keyframe)
2749  distance = 0;
2750  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2751  if (sc->pseudo_stream_id == -1 ||
2752  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2753  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2754  e->pos = current_offset;
2755  e->timestamp = current_dts;
2756  e->size = sample_size;
2757  e->min_distance = distance;
2758  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2759  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2760  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2761  current_offset, current_dts, sample_size, distance, keyframe);
2762  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2763  ff_rfps_add_frame(mov->fc, st, current_dts);
2764  }
2765 
2766  current_offset += sample_size;
2767  stream_size += sample_size;
2768 
2769  /* A negative sample duration is invalid based on the spec,
2770  * but some samples need it to correct the DTS. */
2771  if (sc->stts_data[stts_index].duration < 0) {
2772  av_log(mov->fc, AV_LOG_WARNING,
2773  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
2774  sc->stts_data[stts_index].duration, stts_index,
2775  st->index);
2776  dts_correction += sc->stts_data[stts_index].duration - 1;
2777  sc->stts_data[stts_index].duration = 1;
2778  }
2779  current_dts += sc->stts_data[stts_index].duration;
2780  if (!dts_correction || current_dts + dts_correction > last_dts) {
2781  current_dts += dts_correction;
2782  dts_correction = 0;
2783  } else {
2784  /* Avoid creating non-monotonous DTS */
2785  dts_correction += current_dts - last_dts - 1;
2786  current_dts = last_dts + 1;
2787  }
2788  last_dts = current_dts;
2789  distance++;
2790  stts_sample++;
2791  current_sample++;
2792  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2793  stts_sample = 0;
2794  stts_index++;
2795  }
2796  }
2797  }
2798  if (st->duration > 0)
2799  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2800  } else {
2801  unsigned chunk_samples, total = 0;
2802 
2803  // compute total chunk count
2804  for (i = 0; i < sc->stsc_count; i++) {
2805  unsigned count, chunk_count;
2806 
2807  chunk_samples = sc->stsc_data[i].count;
2808  if (i != sc->stsc_count - 1 &&
2809  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2810  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2811  return;
2812  }
2813 
2814  if (sc->samples_per_frame >= 160) { // gsm
2815  count = chunk_samples / sc->samples_per_frame;
2816  } else if (sc->samples_per_frame > 1) {
2817  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2818  count = (chunk_samples+samples-1) / samples;
2819  } else {
2820  count = (chunk_samples+1023) / 1024;
2821  }
2822 
2823  if (i < sc->stsc_count - 1)
2824  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2825  else
2826  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2827  total += chunk_count * count;
2828  }
2829 
2830  av_log(mov->fc, AV_LOG_TRACE, "chunk count %d\n", total);
2831  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2832  return;
2834  st->nb_index_entries + total,
2835  sizeof(*st->index_entries)) < 0) {
2836  st->nb_index_entries = 0;
2837  return;
2838  }
2839  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2840 
2841  // populate index
2842  for (i = 0; i < sc->chunk_count; i++) {
2843  current_offset = sc->chunk_offsets[i];
2844  if (stsc_index + 1 < sc->stsc_count &&
2845  i + 1 == sc->stsc_data[stsc_index + 1].first)
2846  stsc_index++;
2847  chunk_samples = sc->stsc_data[stsc_index].count;
2848 
2849  while (chunk_samples > 0) {
2850  AVIndexEntry *e;
2851  unsigned size, samples;
2852 
2853  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
2855  "Zero bytes per frame, but %d samples per frame",
2856  sc->samples_per_frame);
2857  return;
2858  }
2859 
2860  if (sc->samples_per_frame >= 160) { // gsm
2861  samples = sc->samples_per_frame;
2862  size = sc->bytes_per_frame;
2863  } else {
2864  if (sc->samples_per_frame > 1) {
2865  samples = FFMIN((1024 / sc->samples_per_frame)*
2866  sc->samples_per_frame, chunk_samples);
2867  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2868  } else {
2869  samples = FFMIN(1024, chunk_samples);
2870  size = samples * sc->sample_size;
2871  }
2872  }
2873 
2874  if (st->nb_index_entries >= total) {
2875  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2876  return;
2877  }
2878  e = &st->index_entries[st->nb_index_entries++];
2879  e->pos = current_offset;
2880  e->timestamp = current_dts;
2881  e->size = size;
2882  e->min_distance = 0;
2883  e->flags = AVINDEX_KEYFRAME;
2884  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2885  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2886  size, samples);
2887 
2888  current_offset += size;
2889  current_dts += samples;
2890  chunk_samples -= samples;
2891  }
2892  }
2893  }
2894 }
2895 
2896 static int test_same_origin(const char *src, const char *ref) {
2897  char src_proto[64];
2898  char ref_proto[64];
2899  char src_auth[256];
2900  char ref_auth[256];
2901  char src_host[256];
2902  char ref_host[256];
2903  int src_port=-1;
2904  int ref_port=-1;
2905 
2906  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
2907  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
2908 
2909  if (strlen(src) == 0) {
2910  return -1;
2911  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
2912  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
2913  strlen(src_host) + 1 >= sizeof(src_host) ||
2914  strlen(ref_host) + 1 >= sizeof(ref_host)) {
2915  return 0;
2916  } else if (strcmp(src_proto, ref_proto) ||
2917  strcmp(src_auth, ref_auth) ||
2918  strcmp(src_host, ref_host) ||
2919  src_port != ref_port) {
2920  return 0;
2921  } else
2922  return 1;
2923 }
2924 
2925 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
2926 {
2927  /* try relative path, we do not try the absolute because it can leak information about our
2928  system to an attacker */
2929  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2930  char filename[1025];
2931  const char *src_path;
2932  int i, l;
2933 
2934  /* find a source dir */
2935  src_path = strrchr(src, '/');
2936  if (src_path)
2937  src_path++;
2938  else
2939  src_path = src;
2940 
2941  /* find a next level down to target */
2942  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2943  if (ref->path[l] == '/') {
2944  if (i == ref->nlvl_to - 1)
2945  break;
2946  else
2947  i++;
2948  }
2949 
2950  /* compose filename if next level down to target was found */
2951  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2952  memcpy(filename, src, src_path - src);
2953  filename[src_path - src] = 0;
2954 
2955  for (i = 1; i < ref->nlvl_from; i++)
2956  av_strlcat(filename, "../", sizeof(filename));
2957 
2958  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
2959  if (!c->use_absolute_path) {
2960  int same_origin = test_same_origin(src, filename);
2961 
2962  if (!same_origin) {
2963  av_log(c->fc, AV_LOG_ERROR,
2964  "Reference with mismatching origin, %s not tried for security reasons, "
2965  "set demuxer option use_absolute_path to allow it anyway\n",
2966  ref->path);
2967  return AVERROR(ENOENT);
2968  }
2969 
2970  if(strstr(ref->path + l + 1, "..") ||
2971  strstr(ref->path + l + 1, ":") ||
2972  (ref->nlvl_from > 1 && same_origin < 0) ||
2973  (filename[0] == '/' && src_path == src))
2974  return AVERROR(ENOENT);
2975  }
2976 
2977  if (strlen(filename) + 1 == sizeof(filename))
2978  return AVERROR(ENOENT);
2979  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
2980  return 0;
2981  }
2982  } else if (c->use_absolute_path) {
2983  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
2984  "this is a possible security issue\n");
2985  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
2986  return 0;
2987  } else {
2988  av_log(c->fc, AV_LOG_ERROR,
2989  "Absolute path %s not tried for security reasons, "
2990  "set demuxer option use_absolute_path to allow absolute paths\n",
2991  ref->path);
2992  }
2993 
2994  return AVERROR(ENOENT);
2995 }
2996 
2998 {
2999  if (sc->time_scale <= 0) {
3000  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3001  sc->time_scale = c->time_scale;
3002  if (sc->time_scale <= 0)
3003  sc->time_scale = 1;
3004  }
3005 }
3006 
3008 {
3009  AVStream *st;
3010  MOVStreamContext *sc;
3011  int ret;
3012 
3013  st = avformat_new_stream(c->fc, NULL);
3014  if (!st) return AVERROR(ENOMEM);
3015  st->id = c->fc->nb_streams;
3016  sc = av_mallocz(sizeof(MOVStreamContext));
3017  if (!sc) return AVERROR(ENOMEM);
3018 
3019  st->priv_data = sc;
3021  sc->ffindex = st->index;
3022  c->trak_index = st->index;
3023 
3024  if ((ret = mov_read_default(c, pb, atom)) < 0)
3025  return ret;
3026 
3027  c->trak_index = -1;
3028 
3029  /* sanity checks */
3030  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3031  (!sc->sample_size && !sc->sample_count))) {
3032  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3033  st->index);
3034  return 0;
3035  }
3036 
3037  fix_timescale(c, sc);
3038 
3039  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3040 
3041  mov_build_index(c, st);
3042 
3043  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3044  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3045  if (c->enable_drefs) {
3046  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3047  av_log(c->fc, AV_LOG_ERROR,
3048  "stream %d, error opening alias: path='%s', dir='%s', "
3049  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3050  st->index, dref->path, dref->dir, dref->filename,
3051  dref->volume, dref->nlvl_from, dref->nlvl_to);
3052  } else {
3053  av_log(c->fc, AV_LOG_WARNING,
3054  "Skipped opening external track: "
3055  "stream %d, alias: path='%s', dir='%s', "
3056  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3057  "Set enable_drefs to allow this.\n",
3058  st->index, dref->path, dref->dir, dref->filename,
3059  dref->volume, dref->nlvl_from, dref->nlvl_to);
3060  }
3061  } else {
3062  sc->pb = c->fc->pb;
3063  sc->pb_is_copied = 1;
3064  }
3065 
3066  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3067  if (!st->sample_aspect_ratio.num && st->codec->width && st->codec->height &&
3068  sc->height && sc->width &&
3069  (st->codec->width != sc->width || st->codec->height != sc->height)) {
3070  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
3071  ((double)st->codec->width * sc->height), INT_MAX);
3072  }
3073 
3074 #if FF_API_R_FRAME_RATE
3075  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3077  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3078 #endif
3079  }
3080 
3081  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3082  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
3083  TAG_IS_AVCI(st->codec->codec_tag)) {
3084  ret = ff_generate_avci_extradata(st);
3085  if (ret < 0)
3086  return ret;
3087  }
3088 
3089  switch (st->codec->codec_id) {
3090 #if CONFIG_H261_DECODER
3091  case AV_CODEC_ID_H261:
3092 #endif
3093 #if CONFIG_H263_DECODER
3094  case AV_CODEC_ID_H263:
3095 #endif
3096 #if CONFIG_MPEG4_DECODER
3097  case AV_CODEC_ID_MPEG4:
3098 #endif
3099  st->codec->width = 0; /* let decoder init width/height */
3100  st->codec->height= 0;
3101  break;
3102  }
3103 
3104  // If the duration of the mp3 packets is not constant, then they could need a parser
3105  if (st->codec->codec_id == AV_CODEC_ID_MP3
3106  && sc->stts_count > 3
3107  && sc->stts_count*10 > st->nb_frames
3108  && sc->time_scale == st->codec->sample_rate) {
3110  }
3111  /* Do not need those anymore. */
3112  av_freep(&sc->chunk_offsets);
3113  av_freep(&sc->stsc_data);
3114  av_freep(&sc->sample_sizes);
3115  av_freep(&sc->keyframes);
3116  av_freep(&sc->stts_data);
3117  av_freep(&sc->stps_data);
3118  av_freep(&sc->elst_data);
3119  av_freep(&sc->rap_group);
3120 
3121  return 0;
3122 }
3123 
3125 {
3126  int ret;
3127  c->itunes_metadata = 1;
3128  ret = mov_read_default(c, pb, atom);
3129  c->itunes_metadata = 0;
3130  return ret;
3131 }
3132 
3134 {
3135  uint32_t count;
3136  uint32_t i;
3137 
3138  if (atom.size < 8)
3139  return 0;
3140 
3141  avio_skip(pb, 4);
3142  count = avio_rb32(pb);
3143  if (count > UINT_MAX / sizeof(*c->meta_keys)) {
3144  av_log(c->fc, AV_LOG_ERROR,
3145  "The 'keys' atom with the invalid key count: %d\n", count);
3146  return AVERROR_INVALIDDATA;
3147  }
3148 
3149  c->meta_keys_count = count + 1;
3150  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3151  if (!c->meta_keys)
3152  return AVERROR(ENOMEM);
3153 
3154  for (i = 1; i <= count; ++i) {
3155  uint32_t key_size = avio_rb32(pb);
3156  uint32_t type = avio_rl32(pb);
3157  if (key_size < 8) {
3158  av_log(c->fc, AV_LOG_ERROR,
3159  "The key# %d in meta has invalid size: %d\n", i, key_size);
3160  return AVERROR_INVALIDDATA;
3161  }
3162  key_size -= 8;
3163  if (type != MKTAG('m','d','t','a')) {
3164  avio_skip(pb, key_size);
3165  }
3166  c->meta_keys[i] = av_mallocz(key_size + 1);
3167  if (!c->meta_keys[i])
3168  return AVERROR(ENOMEM);
3169  avio_read(pb, c->meta_keys[i], key_size);
3170  }
3171 
3172  return 0;
3173 }
3174 
3176 {
3177  int64_t end = avio_tell(pb) + size;
3178  uint8_t *key = NULL, *val = NULL;
3179  int i;
3180  AVStream *st;
3181  MOVStreamContext *sc;
3182 
3183  if (c->fc->nb_streams < 1)
3184  return 0;
3185  st = c->fc->streams[c->fc->nb_streams-1];
3186  sc = st->priv_data;
3187 
3188  for (i = 0; i < 2; i++) {
3189  uint8_t **p;
3190  uint32_t len, tag;
3191  int ret;
3192 
3193  if (end - avio_tell(pb) <= 12)
3194  break;
3195 
3196  len = avio_rb32(pb);
3197  tag = avio_rl32(pb);
3198  avio_skip(pb, 4); // flags
3199 
3200  if (len < 12 || len - 12 > end - avio_tell(pb))
3201  break;
3202  len -= 12;
3203 
3204  if (tag == MKTAG('n', 'a', 'm', 'e'))
3205  p = &key;
3206  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3207  avio_skip(pb, 4);
3208  len -= 4;
3209  p = &val;
3210  } else
3211  break;
3212 
3213  *p = av_malloc(len + 1);
3214  if (!*p)
3215  break;
3216  ret = ffio_read_size(pb, *p, len);
3217  if (ret < 0) {
3218  av_freep(p);
3219  return ret;
3220  }
3221  (*p)[len] = 0;
3222  }
3223 
3224  if (key && val) {
3225  if (strcmp(key, "iTunSMPB") == 0) {
3226  int priming, remainder, samples;
3227  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3228  if(priming>0 && priming<16384)
3229  sc->start_pad = priming;
3230  }
3231  }
3232  if (strcmp(key, "cdec") != 0) {
3233  av_dict_set(&c->fc->metadata, key, val,
3235  key = val = NULL;
3236  }
3237  }
3238 
3239  avio_seek(pb, end, SEEK_SET);
3240  av_freep(&key);
3241  av_freep(&val);
3242  return 0;
3243 }
3244 
3246 {
3247  int64_t end = avio_tell(pb) + atom.size;
3248  uint32_t tag, len;
3249 
3250  if (atom.size < 8)
3251  goto fail;
3252 
3253  len = avio_rb32(pb);
3254  tag = avio_rl32(pb);
3255 
3256  if (len > atom.size)
3257  goto fail;
3258 
3259  if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
3260  uint8_t domain[128];
3261  int domain_len;
3262 
3263  avio_skip(pb, 4); // flags
3264  len -= 12;
3265 
3266  domain_len = avio_get_str(pb, len, domain, sizeof(domain));
3267  avio_skip(pb, len - domain_len);
3268  return mov_read_custom_2plus(c, pb, end - avio_tell(pb));
3269  }
3270 
3271 fail:
3272  av_log(c->fc, AV_LOG_VERBOSE,
3273  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3274  return 0;
3275 }
3276 
3278 {
3279  while (atom.size > 8) {
3280  uint32_t tag = avio_rl32(pb);
3281  atom.size -= 4;
3282  if (tag == MKTAG('h','d','l','r')) {
3283  avio_seek(pb, -8, SEEK_CUR);
3284  atom.size += 8;
3285  return mov_read_default(c, pb, atom);
3286  }
3287  }
3288  return 0;
3289 }
3290 
3292 {
3293  int i;
3294  int width;
3295  int height;
3296  int display_matrix[3][3];
3297  AVStream *st;
3298  MOVStreamContext *sc;
3299  int version;
3300  int flags;
3301 
3302  if (c->fc->nb_streams < 1)
3303  return 0;
3304  st = c->fc->streams[c->fc->nb_streams-1];
3305  sc = st->priv_data;
3306 
3307  version = avio_r8(pb);
3308  flags = avio_rb24(pb);
3310 
3311  if (version == 1) {
3312  avio_rb64(pb);
3313  avio_rb64(pb);
3314  } else {
3315  avio_rb32(pb); /* creation time */
3316  avio_rb32(pb); /* modification time */
3317  }
3318  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
3319  avio_rb32(pb); /* reserved */
3320 
3321  /* highlevel (considering edits) duration in movie timebase */
3322  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
3323  avio_rb32(pb); /* reserved */
3324  avio_rb32(pb); /* reserved */
3325 
3326  avio_rb16(pb); /* layer */
3327  avio_rb16(pb); /* alternate group */
3328  avio_rb16(pb); /* volume */
3329  avio_rb16(pb); /* reserved */
3330 
3331  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
3332  // they're kept in fixed point format through all calculations
3333  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
3334  // side data, but the scale factor is not needed to calculate aspect ratio
3335  for (i = 0; i < 3; i++) {
3336  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
3337  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
3338  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
3339  }
3340 
3341  width = avio_rb32(pb); // 16.16 fixed point track width
3342  height = avio_rb32(pb); // 16.16 fixed point track height
3343  sc->width = width >> 16;
3344  sc->height = height >> 16;
3345 
3346  // save the matrix and add rotate metadata when it is not the default
3347  // identity
3348  if (display_matrix[0][0] != (1 << 16) ||
3349  display_matrix[1][1] != (1 << 16) ||
3350  display_matrix[2][2] != (1 << 30) ||
3351  display_matrix[0][1] || display_matrix[0][2] ||
3352  display_matrix[1][0] || display_matrix[1][2] ||
3353  display_matrix[2][0] || display_matrix[2][1]) {
3354  int i, j;
3355  double rotate;
3356 
3357  av_freep(&sc->display_matrix);
3358  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
3359  if (!sc->display_matrix)
3360  return AVERROR(ENOMEM);
3361 
3362  for (i = 0; i < 3; i++)
3363  for (j = 0; j < 3; j++)
3364  sc->display_matrix[i * 3 + j] = display_matrix[i][j];
3365 
3367  if (!isnan(rotate)) {
3368  char rotate_buf[64];
3369  rotate = -rotate;
3370  if (rotate < 0) // for backward compatibility
3371  rotate += 360;
3372  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
3373  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
3374  }
3375  }
3376 
3377  // transform the display width/height according to the matrix
3378  // to keep the same scale, use [width height 1<<16]
3379  if (width && height && sc->display_matrix) {
3380  double disp_transform[2];
3381 
3382  for (i = 0; i < 2; i++)
3383  disp_transform[i] = hypot(display_matrix[i][0], display_matrix[i][1]);
3384 
3385  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
3386  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
3387  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
3389  disp_transform[0] / disp_transform[1],
3390  INT_MAX);
3391  }
3392  return 0;
3393 }
3394 
3396 {
3397  MOVFragment *frag = &c->fragment;
3398  MOVTrackExt *trex = NULL;
3400  int flags, track_id, i, found = 0;
3401 
3402  avio_r8(pb); /* version */
3403  flags = avio_rb24(pb);
3404 
3405  track_id = avio_rb32(pb);
3406  if (!track_id)
3407  return AVERROR_INVALIDDATA;
3408  frag->track_id = track_id;
3409  for (i = 0; i < c->trex_count; i++)
3410  if (c->trex_data[i].track_id == frag->track_id) {
3411  trex = &c->trex_data[i];
3412  break;
3413  }
3414  if (!trex) {
3415  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
3416  return AVERROR_INVALIDDATA;
3417  }
3418 
3421  frag->moof_offset : frag->implicit_offset;
3422  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
3423 
3424  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
3425  avio_rb32(pb) : trex->duration;
3426  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
3427  avio_rb32(pb) : trex->size;
3428  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
3429  avio_rb32(pb) : trex->flags;
3430  frag->time = AV_NOPTS_VALUE;
3431  for (i = 0; i < c->fragment_index_count; i++) {
3432  int j;
3433  MOVFragmentIndex* candidate = c->fragment_index_data[i];
3434  if (candidate->track_id == frag->track_id) {
3435  av_log(c->fc, AV_LOG_DEBUG,
3436  "found fragment index for track %u\n", frag->track_id);
3437  index = candidate;
3438  for (j = index->current_item; j < index->item_count; j++) {
3439  if (frag->implicit_offset == index->items[j].moof_offset) {
3440  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
3441  "for track %u and moof_offset %"PRId64"\n",
3442  frag->track_id, index->items[j].moof_offset);
3443  frag->time = index->items[j].time;
3444  index->current_item = j + 1;
3445  found = 1;
3446  break;
3447  }
3448  }
3449  if (found)
3450  break;
3451  }
3452  }
3453  if (index && !found) {
3454  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
3455  "it doesn't have an (in-order) entry for moof_offset "
3456  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
3457  }
3458  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
3459  return 0;
3460 }
3461 
3463 {
3464  c->chapter_track = avio_rb32(pb);
3465  return 0;
3466 }
3467 
3469 {
3470  MOVTrackExt *trex;
3471  int err;
3472 
3473  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
3474  return AVERROR_INVALIDDATA;
3475  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
3476  sizeof(*c->trex_data))) < 0) {
3477  c->trex_count = 0;
3478  return err;
3479  }
3480 
3481  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
3482 
3483  trex = &c->trex_data[c->trex_count++];
3484  avio_r8(pb); /* version */
3485  avio_rb24(pb); /* flags */
3486  trex->track_id = avio_rb32(pb);
3487  trex->stsd_id = avio_rb32(pb);
3488  trex->duration = avio_rb32(pb);
3489  trex->size = avio_rb32(pb);
3490  trex->flags = avio_rb32(pb);
3491  return 0;
3492 }
3493 
3495 {
3496  MOVFragment *frag = &c->fragment;
3497  AVStream *st = NULL;
3498  MOVStreamContext *sc;
3499  int version, i;
3500 
3501  for (i = 0; i < c->fc->nb_streams; i++) {
3502  if (c->fc->streams[i]->id == frag->track_id) {
3503  st = c->fc->streams[i];
3504  break;
3505  }
3506  }
3507  if (!st) {
3508  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3509  return AVERROR_INVALIDDATA;
3510  }
3511  sc = st->priv_data;
3512  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
3513  return 0;
3514  version = avio_r8(pb);
3515  avio_rb24(pb); /* flags */
3516  if (version) {
3517  sc->track_end = avio_rb64(pb);
3518  } else {
3519  sc->track_end = avio_rb32(pb);
3520  }
3521  return 0;
3522 }
3523 
3525 {
3526  MOVFragment *frag = &c->fragment;
3527  AVStream *st = NULL;
3528  MOVStreamContext *sc;
3529  MOVStts *ctts_data;
3530  uint64_t offset;
3531  int64_t dts;
3532  int data_offset = 0;
3533  unsigned entries, first_sample_flags = frag->flags;
3534  int flags, distance, i, err;
3535 
3536  for (i = 0; i < c->fc->nb_streams; i++) {
3537  if (c->fc->streams[i]->id == frag->track_id) {
3538  st = c->fc->streams[i];
3539  break;
3540  }
3541  }
3542  if (!st) {
3543  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3544  return AVERROR_INVALIDDATA;
3545  }
3546  sc = st->priv_data;
3547  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
3548  return 0;
3549  avio_r8(pb); /* version */
3550  flags = avio_rb24(pb);
3551  entries = avio_rb32(pb);
3552  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %d\n", flags, entries);
3553 
3554  /* Always assume the presence of composition time offsets.
3555  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
3556  * 1) in the initial movie, there are no samples.
3557  * 2) in the first movie fragment, there is only one sample without composition time offset.
3558  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
3559  if (!sc->ctts_count && sc->sample_count)
3560  {
3561  /* Complement ctts table if moov atom doesn't have ctts atom. */
3562  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
3563  if (!ctts_data)
3564  return AVERROR(ENOMEM);
3565  sc->ctts_data = ctts_data;
3566  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
3567  sc->ctts_data[sc->ctts_count].duration = 0;
3568  sc->ctts_count++;
3569  }
3570  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
3571  return AVERROR_INVALIDDATA;
3572  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
3573  sizeof(*sc->ctts_data))) < 0) {
3574  sc->ctts_count = 0;
3575  return err;
3576  }
3577  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
3578  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
3579  dts = sc->track_end - sc->time_offset;
3580  offset = frag->base_data_offset + data_offset;
3581  distance = 0;
3582  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
3583  for (i = 0; i < entries && !pb->eof_reached; i++) {
3584  unsigned sample_size = frag->size;
3585  int sample_flags = i ? frag->flags : first_sample_flags;
3586  unsigned sample_duration = frag->duration;
3587  int keyframe = 0;
3588 
3589  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
3590  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
3591  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
3592  sc->ctts_data[sc->ctts_count].count = 1;
3593  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
3594  avio_rb32(pb) : 0;
3596  if (frag->time != AV_NOPTS_VALUE) {
3597  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
3598  int64_t pts = frag->time;
3599  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3600  " sc->dts_shift %d ctts.duration %d"
3601  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
3602  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
3603  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
3604  dts = pts - sc->dts_shift;
3605  if (flags & MOV_TRUN_SAMPLE_CTS) {
3606  dts -= sc->ctts_data[sc->ctts_count].duration;
3607  } else {
3608  dts -= sc->time_offset;
3609  }
3610  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
3611  } else {
3612  dts = frag->time;
3613  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3614  ", using it for dts\n", dts);
3615  }
3616  frag->time = AV_NOPTS_VALUE;
3617  }
3618  sc->ctts_count++;
3619  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3620  keyframe = 1;
3621  else
3622  keyframe =
3623  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
3625  if (keyframe)
3626  distance = 0;
3627  err = av_add_index_entry(st, offset, dts, sample_size, distance,
3628  keyframe ? AVINDEX_KEYFRAME : 0);
3629  if (err < 0) {
3630  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
3631  }
3632  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3633  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
3634  offset, dts, sample_size, distance, keyframe);
3635  distance++;
3636  dts += sample_duration;
3637  offset += sample_size;
3638  sc->data_size += sample_size;
3639  sc->duration_for_fps += sample_duration;
3640  sc->nb_frames_for_fps ++;
3641  }
3642 
3643  if (pb->eof_reached)
3644  return AVERROR_EOF;
3645 
3646  frag->implicit_offset = offset;
3647 
3648  sc->track_end = dts + sc->time_offset;
3649  if (st->duration < sc->track_end)
3650  st->duration = sc->track_end;
3651 
3652  return 0;
3653 }
3654 
3656 {
3657  int64_t offset = avio_tell(pb) + atom.size, pts;
3658  uint8_t version;
3659  unsigned i, track_id;
3660  AVStream *st = NULL;
3661  MOVStreamContext *sc;
3663  MOVFragmentIndex **tmp;
3664  AVRational timescale;
3665 
3666  version = avio_r8(pb);
3667  if (version > 1) {
3668  avpriv_request_sample(c->fc, "sidx version %u", version);
3669  return AVERROR_PATCHWELCOME;
3670  }
3671 
3672  avio_rb24(pb); // flags
3673 
3674  track_id = avio_rb32(pb); // Reference ID
3675  for (i = 0; i < c->fc->nb_streams; i++) {
3676  if (c->fc->streams[i]->id == track_id) {
3677  st = c->fc->streams[i];
3678  break;
3679  }
3680  }
3681  if (!st) {
3682  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", track_id);
3683  return AVERROR_INVALIDDATA;
3684  }
3685 
3686  sc = st->priv_data;
3687 
3688  timescale = av_make_q(1, avio_rb32(pb));
3689 
3690  if (version == 0) {
3691  pts = avio_rb32(pb);
3692  offset += avio_rb32(pb);
3693  } else {
3694  pts = avio_rb64(pb);
3695  offset += avio_rb64(pb);
3696  }
3697 
3698  avio_rb16(pb); // reserved
3699 
3700  index = av_mallocz(sizeof(MOVFragmentIndex));
3701  if (!index)
3702  return AVERROR(ENOMEM);
3703 
3704  index->track_id = track_id;
3705 
3706  index->item_count = avio_rb16(pb);
3707  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
3708 
3709  if (!index->items) {
3710  av_freep(&index);
3711  return AVERROR(ENOMEM);
3712  }
3713 
3714  for (i = 0; i < index->item_count; i++) {
3715  uint32_t size = avio_rb32(pb);
3716  uint32_t duration = avio_rb32(pb);
3717  if (size & 0x80000000) {
3718  avpriv_request_sample(c->fc, "sidx reference_type 1");
3719  av_freep(&index->items);
3720  av_freep(&index);
3721  return AVERROR_PATCHWELCOME;
3722  }
3723  avio_rb32(pb); // sap_flags
3724  index->items[i].moof_offset = offset;
3725  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
3726  offset += size;
3727  pts += duration;
3728  }
3729 
3730  st->duration = sc->track_end = pts;
3731 
3733  c->fragment_index_count + 1,
3734  sizeof(MOVFragmentIndex*));
3735  if (!tmp) {
3736  av_freep(&index->items);
3737  av_freep(&index);
3738  return AVERROR(ENOMEM);
3739  }
3740 
3741  c->fragment_index_data = tmp;
3743 
3744  if (offset == avio_size(pb))
3745  c->fragment_index_complete = 1;
3746 
3747  return 0;
3748 }
3749 
3750 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
3751 /* like the files created with Adobe Premiere 5.0, for samples see */
3752 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
3754 {
3755  int err;
3756 
3757  if (atom.size < 8)
3758  return 0; /* continue */
3759  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
3760  avio_skip(pb, atom.size - 4);
3761  return 0;
3762  }
3763  atom.type = avio_rl32(pb);
3764  atom.size -= 8;
3765  if (atom.type != MKTAG('m','d','a','t')) {
3766  avio_skip(pb, atom.size);
3767  return 0;
3768  }
3769  err = mov_read_mdat(c, pb, atom);
3770  return err;
3771 }
3772 
3774 {
3775 #if CONFIG_ZLIB
3776  AVIOContext ctx;
3777  uint8_t *cmov_data;
3778  uint8_t *moov_data; /* uncompressed data */
3779  long cmov_len, moov_len;
3780  int ret = -1;
3781 
3782  avio_rb32(pb); /* dcom atom */
3783  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
3784  return AVERROR_INVALIDDATA;
3785  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
3786  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
3787  return AVERROR_INVALIDDATA;
3788  }
3789  avio_rb32(pb); /* cmvd atom */
3790  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
3791  return AVERROR_INVALIDDATA;
3792  moov_len = avio_rb32(pb); /* uncompressed size */
3793  cmov_len = atom.size - 6 * 4;
3794 
3795  cmov_data = av_malloc(cmov_len);
3796  if (!cmov_data)
3797  return AVERROR(ENOMEM);
3798  moov_data = av_malloc(moov_len);
3799  if (!moov_data) {
3800  av_free(cmov_data);
3801  return AVERROR(ENOMEM);
3802  }
3803  ret = ffio_read_size(pb, cmov_data, cmov_len);
3804  if (ret < 0)
3805  goto free_and_return;
3806 
3807  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
3808  goto free_and_return;
3809  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
3810  goto free_and_return;
3812  atom.type = MKTAG('m','o','o','v');
3813  atom.size = moov_len;
3814  ret = mov_read_default(c, &ctx, atom);
3815 free_and_return:
3816  av_free(moov_data);
3817  av_free(cmov_data);
3818  return ret;
3819 #else
3820  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
3821  return AVERROR(ENOSYS);
3822 #endif
3823 }
3824 
3825 /* edit list atom */
3827 {
3828  MOVStreamContext *sc;
3829  int i, edit_count, version;
3830 
3831  if (c->fc->nb_streams < 1 || c->ignore_editlist)
3832  return 0;
3833  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
3834 
3835  version = avio_r8(pb); /* version */
3836  avio_rb24(pb); /* flags */
3837  edit_count = avio_rb32(pb); /* entries */
3838 
3839  if (!edit_count)
3840  return 0;
3841  if (sc->elst_data)
3842  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
3843  av_free(sc->elst_data);
3844  sc->elst_count = 0;
3845  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
3846  if (!sc->elst_data)
3847  return AVERROR(ENOMEM);
3848 
3849  av_log(c->fc, AV_LOG_TRACE, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3850  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
3851  MOVElst *e = &sc->elst_data[i];
3852 
3853  if (version == 1) {
3854  e->duration = avio_rb64(pb);
3855  e->time = avio_rb64(pb);
3856  } else {
3857  e->duration = avio_rb32(pb); /* segment duration */
3858  e->time = (int32_t)avio_rb32(pb); /* media time */
3859  }
3860  e->rate = avio_rb32(pb) / 65536.0;
3861  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3862  e->duration, e->time, e->rate);
3863  }
3864  sc->elst_count = i;
3865 
3866  return 0;
3867 }
3868 
3870 {
3871  MOVStreamContext *sc;
3872 
3873  if (c->fc->nb_streams < 1)
3874  return AVERROR_INVALIDDATA;
3875  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3876  sc->timecode_track = avio_rb32(pb);
3877  return 0;
3878 }
3879 
3881 {
3882  int ret;
3883  uint8_t uuid[16];
3884  static const uint8_t uuid_isml_manifest[] = {
3885  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3886  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3887  };
3888  static const uint8_t uuid_xmp[] = {
3889  0xbe, 0x7a, 0xcf, 0xcb, 0x97, 0xa9, 0x42, 0xe8,
3890  0x9c, 0x71, 0x99, 0x94, 0x91, 0xe3, 0xaf, 0xac
3891  };
3892 
3893  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3894  return AVERROR_INVALIDDATA;
3895 
3896  ret = avio_read(pb, uuid, sizeof(uuid));
3897  if (ret < 0) {
3898  return ret;
3899  } else if (ret != sizeof(uuid)) {
3900  return AVERROR_INVALIDDATA;
3901  }
3902  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3903  uint8_t *buffer, *ptr;
3904  char *endptr;
3905  size_t len = atom.size - sizeof(uuid);
3906 
3907  if (len < 4) {
3908  return AVERROR_INVALIDDATA;
3909  }
3910  ret = avio_skip(pb, 4); // zeroes
3911  len -= 4;
3912 
3913  buffer = av_mallocz(len + 1);
3914  if (!buffer) {
3915  return AVERROR(ENOMEM);
3916  }
3917  ret = avio_read(pb, buffer, len);
3918  if (ret < 0) {
3919  av_free(buffer);
3920  return ret;
3921  } else if (ret != len) {
3922  av_free(buffer);
3923  return AVERROR_INVALIDDATA;
3924  }
3925 
3926  ptr = buffer;
3927  while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
3928  ptr += sizeof("systemBitrate=\"") - 1;
3929  c->bitrates_count++;
3930  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3931  if (!c->bitrates) {
3932  c->bitrates_count = 0;
3933  av_free(buffer);
3934  return AVERROR(ENOMEM);
3935  }
3936  errno = 0;
3937  ret = strtol(ptr, &endptr, 10);
3938  if (ret < 0 || errno || *endptr != '"') {
3939  c->bitrates[c->bitrates_count - 1] = 0;
3940  } else {
3941  c->bitrates[c->bitrates_count - 1] = ret;
3942  }
3943  }
3944 
3945  av_free(buffer);
3946  } else if (!memcmp(uuid, uuid_xmp, sizeof(uuid))) {
3947  uint8_t *buffer;
3948  size_t len = atom.size - sizeof(uuid);
3949 
3950  buffer = av_mallocz(len + 1);
3951  if (!buffer) {
3952  return AVERROR(ENOMEM);
3953  }
3954  ret = avio_read(pb, buffer, len);
3955  if (ret < 0) {
3956  av_free(buffer);
3957  return ret;
3958  } else if (ret != len) {
3959  av_free(buffer);
3960  return AVERROR_INVALIDDATA;
3961  }
3962  if (c->export_xmp) {
3963  buffer[len] = '\0';
3964  av_dict_set(&c->fc->metadata, "xmp", buffer, 0);
3965  }
3966  av_free(buffer);
3967  }
3968  return 0;
3969 }
3970 
3972 {
3973  int ret;
3974  uint8_t content[16];
3975 
3976  if (atom.size < 8)
3977  return 0;
3978 
3979  ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
3980  if (ret < 0)
3981  return ret;
3982 
3983  if ( !c->found_moov
3984  && !c->found_mdat
3985  && !memcmp(content, "Anevia\x1A\x1A", 8)
3988  }
3989 
3990  return 0;
3991 }
3992 
3994 {
3995  uint32_t format = avio_rl32(pb);
3996  MOVStreamContext *sc;
3997  enum AVCodecID id;
3998  AVStream *st;
3999 
4000  if (c->fc->nb_streams < 1)
4001  return 0;
4002  st = c->fc->streams[c->fc->nb_streams - 1];
4003  sc = st->priv_data;
4004 
4005  switch (sc->format)
4006  {
4007  case MKTAG('e','n','c','v'): // encrypted video
4008  case MKTAG('e','n','c','a'): // encrypted audio
4009  id = mov_codec_id(st, format);
4010  if (st->codec->codec_id != AV_CODEC_ID_NONE &&
4011  st->codec->codec_id != id) {
4012  av_log(c->fc, AV_LOG_WARNING,
4013  "ignoring 'frma' atom of '%.4s', stream has codec id %d\n",
4014  (char*)&format, st->codec->codec_id);
4015  break;
4016  }
4017 
4018  st->codec->codec_id = id;
4019  sc->format = format;
4020  break;
4021 
4022  default:
4023  if (format != sc->format) {
4024  av_log(c->fc, AV_LOG_WARNING,
4025  "ignoring 'frma' atom of '%.4s', stream format is '%.4s'\n",
4026  (char*)&format, (char*)&sc->format);
4027  }
4028  break;
4029  }
4030 
4031  return 0;
4032 }
4033 
4035 {
4036  AVStream *st;
4037  MOVStreamContext *sc;
4038  size_t auxiliary_info_size;
4039 
4040  if (c->decryption_key_len == 0 || c->fc->nb_streams < 1)
4041  return 0;
4042 
4043  st = c->fc->streams[c->fc->nb_streams - 1];
4044  sc = st->priv_data;
4045 
4046  if (sc->cenc.aes_ctr) {
4047  av_log(c->fc, AV_LOG_ERROR, "duplicate senc atom\n");
4048  return AVERROR_INVALIDDATA;
4049  }
4050 
4051  avio_r8(pb); /* version */
4052  sc->cenc.use_subsamples = avio_rb24(pb) & 0x02; /* flags */
4053 
4054  avio_rb32(pb); /* entries */
4055 
4056  if (atom.size < 8) {
4057  av_log(c->fc, AV_LOG_ERROR, "senc atom size %"PRId64" too small\n", atom.size);
4058  return AVERROR_INVALIDDATA;
4059  }
4060 
4061  /* save the auxiliary info as is */
4062  auxiliary_info_size = atom.size - 8;
4063 
4064  sc->cenc.auxiliary_info = av_malloc(auxiliary_info_size);
4065  if (!sc->cenc.auxiliary_info) {
4066  return AVERROR(ENOMEM);
4067  }
4068 
4069  sc->cenc.auxiliary_info_end = sc->cenc.auxiliary_info + auxiliary_info_size;
4070 
4072 
4073  if (avio_read(pb, sc->cenc.auxiliary_info, auxiliary_info_size) != auxiliary_info_size) {
4074  av_log(c->fc, AV_LOG_ERROR, "failed to read the auxiliary info");
4075  return AVERROR_INVALIDDATA;
4076  }
4077 
4078  /* initialize the cipher */
4079  sc->cenc.aes_ctr = av_aes_ctr_alloc();
4080  if (!sc->cenc.aes_ctr) {
4081  return AVERROR(ENOMEM);
4082  }
4083 
4084  return av_aes_ctr_init(sc->cenc.aes_ctr, c->decryption_key);
4085 }
4086 
4087 static int cenc_filter(MOVContext *c, MOVStreamContext *sc, uint8_t *input, int size)
4088 {
4089  uint32_t encrypted_bytes;
4090  uint16_t subsample_count;
4091  uint16_t clear_bytes;
4092  uint8_t* input_end = input + size;
4093 
4094  /* read the iv */
4096  av_log(c->fc, AV_LOG_ERROR, "failed to read iv from the auxiliary info\n");
4097  return AVERROR_INVALIDDATA;
4098  }
4099 
4102 
4103  if (!sc->cenc.use_subsamples)
4104  {
4105  /* decrypt the whole packet */
4106  av_aes_ctr_crypt(sc->cenc.aes_ctr, input, input, size);
4107  return 0;
4108  }
4109 
4110  /* read the subsample count */
4111  if (sizeof(uint16_t) > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) {
4112  av_log(c->fc, AV_LOG_ERROR, "failed to read subsample count from the auxiliary info\n");
4113  return AVERROR_INVALIDDATA;
4114  }
4115 
4116  subsample_count = AV_RB16(sc->cenc.auxiliary_info_pos);
4117  sc->cenc.auxiliary_info_pos += sizeof(uint16_t);
4118 
4119  for (; subsample_count > 0; subsample_count--)
4120  {
4121  if (6 > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) {
4122  av_log(c->fc, AV_LOG_ERROR, "failed to read subsample from the auxiliary info\n");
4123  return AVERROR_INVALIDDATA;
4124  }
4125 
4126  /* read the number of clear / encrypted bytes */
4127  clear_bytes = AV_RB16(sc->cenc.auxiliary_info_pos);
4128  sc->cenc.auxiliary_info_pos += sizeof(uint16_t);
4129  encrypted_bytes = AV_RB32(sc->cenc.auxiliary_info_pos);
4130  sc->cenc.auxiliary_info_pos += sizeof(uint32_t);
4131 
4132  if ((uint64_t)clear_bytes + encrypted_bytes > input_end - input) {
4133  av_log(c->fc, AV_LOG_ERROR, "subsample size exceeds the packet size left\n");
4134  return AVERROR_INVALIDDATA;
4135  }
4136 
4137  /* skip the clear bytes */
4138  input += clear_bytes;
4139 
4140  /* decrypt the encrypted bytes */
4141  av_aes_ctr_crypt(sc->cenc.aes_ctr, input, input, encrypted_bytes);
4142  input += encrypted_bytes;
4143  }
4144 
4145  if (input < input_end) {
4146  av_log(c->fc, AV_LOG_ERROR, "leftover packet bytes after subsample processing\n");
4147  return AVERROR_INVALIDDATA;
4148  }
4149 
4150  return 0;
4151 }
4152 
4154 { MKTAG('A','C','L','R'), mov_read_aclr },
4155 { MKTAG('A','P','R','G'), mov_read_avid },
4156 { MKTAG('A','A','L','P'), mov_read_avid },
4157 { MKTAG('A','R','E','S'), mov_read_ares },
4158 { MKTAG('a','v','s','s'), mov_read_avss },
4159 { MKTAG('c','h','p','l'), mov_read_chpl },
4160 { MKTAG('c','o','6','4'), mov_read_stco },
4161 { MKTAG('c','o','l','r'), mov_read_colr },
4162 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
4163 { MKTAG('d','i','n','f'), mov_read_default },
4164 { MKTAG('D','p','x','E'), mov_read_dpxe },
4165 { MKTAG('d','r','e','f'), mov_read_dref },
4166 { MKTAG('e','d','t','s'), mov_read_default },
4167 { MKTAG('e','l','s','t'), mov_read_elst },
4168 { MKTAG('e','n','d','a'), mov_read_enda },
4169 { MKTAG('f','i','e','l'), mov_read_fiel },
4170 { MKTAG('a','d','r','m'), mov_read_adrm },
4171 { MKTAG('f','t','y','p'), mov_read_ftyp },
4172 { MKTAG('g','l','b','l'), mov_read_glbl },
4173 { MKTAG('h','d','l','r'), mov_read_hdlr },
4174 { MKTAG('i','l','s','t'), mov_read_ilst },
4175 { MKTAG('j','p','2','h'), mov_read_jp2h },
4176 { MKTAG('m','d','a','t'), mov_read_mdat },
4177 { MKTAG('m','d','h','d'), mov_read_mdhd },
4178 { MKTAG('m','d','i','a'), mov_read_default },
4179 { MKTAG('m','e','t','a'), mov_read_meta },
4180 { MKTAG('m','i','n','f'), mov_read_default },
4181 { MKTAG('m','o','o','f'), mov_read_moof },
4182 { MKTAG('m','o','o','v'), mov_read_moov },
4183 { MKTAG('m','v','e','x'), mov_read_default },
4184 { MKTAG('m','v','h','d'), mov_read_mvhd },
4185 { MKTAG('S','M','I',' '), mov_read_svq3 },
4186 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
4187 { MKTAG('a','v','c','C'), mov_read_glbl },
4188 { MKTAG('p','a','s','p'), mov_read_pasp },
4189 { MKTAG('s','i','d','x'), mov_read_sidx },
4190 { MKTAG('s','t','b','l'), mov_read_default },
4191 { MKTAG('s','t','c','o'), mov_read_stco },
4192 { MKTAG('s','t','p','s'), mov_read_stps },
4193 { MKTAG('s','t','r','f'), mov_read_strf },
4194 { MKTAG('s','t','s','c'), mov_read_stsc },
4195 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
4196 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
4197 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
4198 { MKTAG('s','t','t','s'), mov_read_stts },
4199 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
4200 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
4201 { MKTAG('t','f','d','t'), mov_read_tfdt },
4202 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
4203 { MKTAG('t','r','a','k'), mov_read_trak },
4204 { MKTAG('t','r','a','f'), mov_read_default },
4205 { MKTAG('t','r','e','f'), mov_read_default },
4206 { MKTAG('t','m','c','d'), mov_read_tmcd },
4207 { MKTAG('c','h','a','p'), mov_read_chap },
4208 { MKTAG('t','r','e','x'), mov_read_trex },
4209 { MKTAG('t','r','u','n'), mov_read_trun },
4210 { MKTAG('u','d','t','a'), mov_read_default },
4211 { MKTAG('w','a','v','e'), mov_read_wave },
4212 { MKTAG('e','s','d','s'), mov_read_esds },
4213 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
4214 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
4215 { MKTAG('d','d','t','s'), mov_read_ddts }, /* DTS audio descriptor */
4216 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
4217 { MKTAG('w','f','e','x'), mov_read_wfex },
4218 { MKTAG('c','m','o','v'), mov_read_cmov },
4219 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
4220 { MKTAG('d','v','c','1'), mov_read_dvc1 },
4221 { MKTAG('s','b','g','p'), mov_read_sbgp },
4222 { MKTAG('h','v','c','C'), mov_read_glbl },
4223 { MKTAG('u','u','i','d'), mov_read_uuid },
4224 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
4225 { MKTAG('f','r','e','e'), mov_read_free },
4226 { MKTAG('-','-','-','-'), mov_read_custom },
4227 { MKTAG('s','i','n','f'), mov_read_default },
4228 { MKTAG('f','r','m','a'), mov_read_frma },
4229 { MKTAG('s','e','n','c'), mov_read_senc },
4230 { 0, NULL }
4231 };
4232 
4234 {
4235  int64_t total_size = 0;
4236  MOVAtom a;
4237  int i;
4238 
4239  if (c->atom_depth > 10) {
4240  av_log(c->fc, AV_LOG_ERROR, "Atoms too deeply nested\n");
4241  return AVERROR_INVALIDDATA;
4242  }
4243  c->atom_depth ++;
4244 
4245  if (atom.size < 0)
4246  atom.size = INT64_MAX;
4247  while (total_size + 8 <= atom.size && !avio_feof(pb)) {
4248  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
4249  a.size = atom.size;
4250  a.type=0;
4251  if (atom.size >= 8) {
4252  a.size = avio_rb32(pb);
4253  a.type = avio_rl32(pb);
4254  if (a.type == MKTAG('f','r','e','e') &&
4255  a.size >= 8 &&
4256  c->moov_retry) {
4257  uint8_t buf[8];
4258  uint32_t *type = (uint32_t *)buf + 1;
4259  if (avio_read(pb, buf, 8) != 8)
4260  return AVERROR_INVALIDDATA;
4261  avio_seek(pb, -8, SEEK_CUR);
4262  if (*type == MKTAG('m','v','h','d') ||
4263  *type == MKTAG('c','m','o','v')) {
4264  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
4265  a.type = MKTAG('m','o','o','v');
4266  }
4267  }
4268  if (atom.type != MKTAG('r','o','o','t') &&
4269  atom.type != MKTAG('m','o','o','v'))
4270  {
4271  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
4272  {
4273  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
4274  avio_skip(pb, -8);
4275  c->atom_depth --;
4276  return 0;
4277  }
4278  }
4279  total_size += 8;
4280  if (a.size == 1 && total_size + 8 <= atom.size) { /* 64 bit extended size */
4281  a.size = avio_rb64(pb) - 8;
4282  total_size += 8;
4283  }
4284  }
4285  av_log(c->fc, AV_LOG_TRACE, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
4286  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
4287  if (a.size == 0) {
4288  a.size = atom.size - total_size + 8;
4289  }
4290  a.size -= 8;
4291  if (a.size < 0)
4292  break;
4293  a.size = FFMIN(a.size, atom.size - total_size);
4294 
4295  for (i = 0; mov_default_parse_table[i].type; i++)
4296  if (mov_default_parse_table[i].type == a.type) {
4297  parse = mov_default_parse_table[i].parse;
4298  break;
4299  }
4300 
4301  // container is user data
4302  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
4303  atom.type == MKTAG('i','l','s','t')))
4305 
4306  // Supports parsing the QuickTime Metadata Keys.
4307  // https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/Metadata/Metadata.html
4308  if (!parse && c->found_hdlr_mdta &&
4309  atom.type == MKTAG('m','e','t','a') &&
4310  a.type == MKTAG('k','e','y','s')) {
4311  parse = mov_read_keys;
4312  }
4313 
4314  if (!parse) { /* skip leaf atoms data */
4315  avio_skip(pb, a.size);
4316  } else {
4317  int64_t start_pos = avio_tell(pb);
4318  int64_t left;
4319  int err = parse(c, pb, a);
4320  if (err < 0) {
4321  c->atom_depth --;
4322  return err;
4323  }
4324  if (c->found_moov && c->found_mdat &&
4325  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX || c->fragment_index_complete) ||
4326  start_pos + a.size == avio_size(pb))) {
4327  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX || c->fragment_index_complete)
4328  c->next_root_atom = start_pos + a.size;
4329  c->atom_depth --;
4330  return 0;
4331  }
4332  left = a.size - avio_tell(pb) + start_pos;
4333  if (left > 0) /* skip garbage at atom end */
4334  avio_skip(pb, left);
4335  else if (left < 0) {
4336  av_log(c->fc, AV_LOG_WARNING,
4337  "overread end of atom '%.4s' by %"PRId64" bytes\n",
4338  (char*)&a.type, -left);
4339  avio_seek(pb, left, SEEK_CUR);
4340  }
4341  }
4342 
4343  total_size += a.size;
4344  }
4345 
4346  if (total_size < atom.size && atom.size < 0x7ffff)
4347  avio_skip(pb, atom.size - total_size);
4348 
4349  c->atom_depth --;
4350  return 0;
4351 }
4352 
4353 static int mov_probe(AVProbeData *p)
4354 {
4355  int64_t offset;
4356  uint32_t tag;
4357  int score = 0;
4358  int moov_offset = -1;
4359 
4360  /* check file header */
4361  offset = 0;
4362  for (;;) {
4363  /* ignore invalid offset */
4364  if ((offset + 8) > (unsigned int)p->buf_size)
4365  break;
4366  tag = AV_RL32(p->buf + offset + 4);
4367  switch(tag) {
4368  /* check for obvious tags */
4369  case MKTAG('m','o','o','v'):
4370  moov_offset = offset + 4;
4371  case MKTAG('m','d','a','t'):
4372  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
4373  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
4374  case MKTAG('f','t','y','p'):
4375  if (AV_RB32(p->buf+offset) < 8 &&
4376  (AV_RB32(p->buf+offset) != 1 ||
4377  offset + 12 > (unsigned int)p->buf_size ||
4378  AV_RB64(p->buf+offset + 8) == 0)) {
4379  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
4380  } else if (tag == MKTAG('f','t','y','p') &&
4381  ( AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')
4382  || AV_RL32(p->buf + offset + 8) == MKTAG('j','p','x',' ')
4383  )) {
4384  score = FFMAX(score, 5);
4385  } else {
4386  score = AVPROBE_SCORE_MAX;
4387  }
4388  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4389  break;
4390  /* those are more common words, so rate then a bit less */
4391  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
4392  case MKTAG('w','i','d','e'):
4393  case MKTAG('f','r','e','e'):
4394  case MKTAG('j','u','n','k'):
4395  case MKTAG('p','i','c','t'):
4396  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
4397  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4398  break;
4399  case MKTAG(0x82,0x82,0x7f,0x7d):
4400  case MKTAG('s','k','i','p'):
4401  case MKTAG('u','u','i','d'):
4402  case MKTAG('p','r','f','l'):
4403  /* if we only find those cause probedata is too small at least rate them */
4404  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
4405  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4406  break;
4407  default:
4408  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4409  }
4410  }
4411  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
4412  /* moov atom in the header - we should make sure that this is not a
4413  * MOV-packed MPEG-PS */
4414  offset = moov_offset;
4415 
4416  while(offset < (p->buf_size - 16)){ /* Sufficient space */
4417  /* We found an actual hdlr atom */
4418  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
4419  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
4420  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
4421  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
4422  /* We found a media handler reference atom describing an
4423  * MPEG-PS-in-MOV, return a
4424  * low score to force expanding the probe window until
4425  * mpegps_probe finds what it needs */
4426  return 5;
4427  }else
4428  /* Keep looking */
4429  offset+=2;
4430  }
4431  }
4432 
4433  return score;
4434 }
4435 
4436 // must be done after parsing all trak because there's no order requirement
4438 {
4439  MOVContext *mov = s->priv_data;
4440  AVStream *st = NULL;
4441  MOVStreamContext *sc;
4442  int64_t cur_pos;
4443  int i;
4444 
4445  for (i = 0; i < s->nb_streams; i++)
4446  if (s->streams[i]->id == mov->chapter_track) {
4447  st = s->streams[i];
4448  break;
4449  }
4450  if (!st) {
4451  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
4452  return;
4453  }
4454 
4455  st->discard = AVDISCARD_ALL;
4456  sc = st->priv_data;
4457  cur_pos = avio_tell(sc->pb);
4458 
4459  for (i = 0; i < st->nb_index_entries; i++) {
4460  AVIndexEntry *sample = &st->index_entries[i];
4461  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
4462  uint8_t *title;
4463  uint16_t ch;
4464  int len, title_len;
4465 
4466  if (end < sample->timestamp) {
4467  av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
4468  end = AV_NOPTS_VALUE;
4469  }
4470 
4471  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
4472  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
4473  goto finish;
4474  }
4475 
4476  // the first two bytes are the length of the title
4477  len = avio_rb16(sc->pb);
4478  if (len > sample->size-2)
4479  continue;
4480  title_len = 2*len + 1;
4481  if (!(title = av_mallocz(title_len)))
4482  goto finish;
4483 
4484  // The samples could theoretically be in any encoding if there's an encd
4485  // atom following, but in practice are only utf-8 or utf-16, distinguished
4486  // instead by the presence of a BOM
4487  if (!len) {
4488  title[0] = 0;
4489  } else {
4490  ch = avio_rb16(sc->pb);
4491  if (ch == 0xfeff)
4492  avio_get_str16be(sc->pb, len, title, title_len);
4493  else if (ch == 0xfffe)
4494  avio_get_str16le(sc->pb, len, title, title_len);
4495  else {
4496  AV_WB16(title, ch);
4497  if (len == 1 || len == 2)
4498  title[len] = 0;
4499  else
4500  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
4501  }
4502  }
4503 
4504  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
4505  av_freep(&title);
4506  }
4507 finish:
4508  avio_seek(sc->pb, cur_pos, SEEK_SET);
4509 }
4510 
4512  uint32_t value, int flags)
4513 {
4514  AVTimecode tc;
4515  char buf[AV_TIMECODE_STR_SIZE];
4516  AVRational rate = {st->codec->time_base.den,
4517  st->codec->time_base.num};
4518  int ret = av_timecode_init(&tc, rate, flags, 0, s);
4519  if (ret < 0)
4520  return ret;
4521  av_dict_set(&st->metadata, "timecode",
4522  av_timecode_make_string(&tc, buf, value), 0);
4523  return 0;
4524 }
4525 
4527 {
4528  MOVStreamContext *sc = st->priv_data;
4529  int flags = 0;
4530  int64_t cur_pos = avio_tell(sc->pb);
4531  uint32_t value;
4532 
4533  if (!st->nb_index_entries)
4534  return -1;
4535 
4536  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
4537  value = avio_rb32(s->pb);
4538 
4539  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
4540  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
4541  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
4542 
4543  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
4544  * not the case) and thus assume "frame number format" instead of QT one.
4545  * No sample with tmcd track can be found with a QT timecode at the moment,
4546  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
4547  * format). */
4548  parse_timecode_in_framenum_format(s, st, value, flags);
4549 
4550  avio_seek(sc->pb, cur_pos, SEEK_SET);
4551  return 0;
4552 }
4553 
4555 {
4556  MOVContext *mov = s->priv_data;
4557  int i, j;
4558 
4559  for (i = 0; i < s->nb_streams; i++) {
4560  AVStream *st = s->streams[i];
4561  MOVStreamContext *sc = st->priv_data;
4562 
4563  if (!sc)
4564  continue;