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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"
31 #include "libavutil/channel_layout.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/intfloat.h"
34 #include "libavutil/mathematics.h"
35 #include "libavutil/time_internal.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/display.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/timecode.h"
41 #include "libavcodec/ac3tab.h"
42 #include "avformat.h"
43 #include "internal.h"
44 #include "avio_internal.h"
45 #include "riff.h"
46 #include "isom.h"
47 #include "libavcodec/get_bits.h"
48 #include "id3v1.h"
49 #include "mov_chan.h"
50 #include "replaygain.h"
51 
52 #if CONFIG_ZLIB
53 #include <zlib.h>
54 #endif
55 
56 #include "qtpalette.h"
57 
58 /* those functions parse an atom */
59 /* links atom IDs to parse functions */
60 typedef struct MOVParseTableEntry {
61  uint32_t type;
62  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
63 } MOVParseTableEntry;
64 
65 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
66 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
67 
68 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
69  unsigned len, const char *key)
70 {
71  char buf[16];
72 
73  short current, total = 0;
74  avio_rb16(pb); // unknown
75  current = avio_rb16(pb);
76  if (len >= 6)
77  total = avio_rb16(pb);
78  if (!total)
79  snprintf(buf, sizeof(buf), "%d", current);
80  else
81  snprintf(buf, sizeof(buf), "%d/%d", current, total);
82  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
83  av_dict_set(&c->fc->metadata, key, buf, 0);
84 
85  return 0;
86 }
87 
88 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
89  unsigned len, const char *key)
90 {
91  /* bypass padding bytes */
92  avio_r8(pb);
93  avio_r8(pb);
94  avio_r8(pb);
95 
96  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
97  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
98 
99  return 0;
100 }
101 
102 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
103  unsigned len, const char *key)
104 {
105  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
106  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
107 
108  return 0;
109 }
110 
111 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
112  unsigned len, const char *key)
113 {
114  short genre;
115 
116  avio_r8(pb); // unknown
117 
118  genre = avio_r8(pb);
119  if (genre < 1 || genre > ID3v1_GENRE_MAX)
120  return 0;
121  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
122  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
123 
124  return 0;
125 }
126 
127 static const uint32_t mac_to_unicode[128] = {
128  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
129  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
130  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
131  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
132  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
133  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
134  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
135  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
136  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
137  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
138  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
139  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
140  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
141  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
142  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
143  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
144 };
145 
146 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
147  char *dst, int dstlen)
148 {
149  char *p = dst;
150  char *end = dst+dstlen-1;
151  int i;
152 
153  for (i = 0; i < len; i++) {
154  uint8_t t, c = avio_r8(pb);
155  if (c < 0x80 && p < end)
156  *p++ = c;
157  else if (p < end)
158  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
159  }
160  *p = 0;
161  return p - dst;
162 }
163 
164 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
165 {
166  AVPacket pkt;
167  AVStream *st;
168  MOVStreamContext *sc;
169  enum AVCodecID id;
170  int ret;
171 
172  switch (type) {
173  case 0xd: id = AV_CODEC_ID_MJPEG; break;
174  case 0xe: id = AV_CODEC_ID_PNG; break;
175  case 0x1b: id = AV_CODEC_ID_BMP; break;
176  default:
177  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
178  avio_skip(pb, len);
179  return 0;
180  }
181 
182  st = avformat_new_stream(c->fc, NULL);
183  if (!st)
184  return AVERROR(ENOMEM);
185  sc = av_mallocz(sizeof(*sc));
186  if (!sc)
187  return AVERROR(ENOMEM);
188  st->priv_data = sc;
189 
190  ret = av_get_packet(pb, &pkt, len);
191  if (ret < 0)
192  return ret;
193 
194  st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
195 
196  st->attached_pic = pkt;
197  st->attached_pic.stream_index = st->index;
198  st->attached_pic.flags |= AV_PKT_FLAG_KEY;
199 
200  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
201  st->codec->codec_id = id;
202 
203  return 0;
204 }
205 
206 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
207 {
208  char language[4] = { 0 };
209  char buf[100];
210  uint16_t langcode = 0;
211  double longitude, latitude;
212  const char *key = "location";
213 
214  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4)
215  return AVERROR_INVALIDDATA;
216 
217  avio_skip(pb, 4); // version+flags
218  langcode = avio_rb16(pb);
219  ff_mov_lang_to_iso639(langcode, language);
220  len -= 6;
221 
222  len -= avio_get_str(pb, len, buf, sizeof(buf)); // place name
223  if (len < 1)
224  return AVERROR_INVALIDDATA;
225  avio_skip(pb, 1); // role
226  len -= 1;
227 
228  if (len < 14)
229  return AVERROR_INVALIDDATA;
230  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
231  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
232 
233  // Try to output in the same format as the ?xyz field
234  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f/", latitude, longitude);
235  if (*language && strcmp(language, "und")) {
236  char key2[16];
237  snprintf(key2, sizeof(key2), "%s-%s", key, language);
238  av_dict_set(&c->fc->metadata, key2, buf, 0);
239  }
240  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
241  return av_dict_set(&c->fc->metadata, key, buf, 0);
242 }
243 
244 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
245 {
246  char tmp_key[5];
247  char key2[32], language[4] = {0};
248  char *str = NULL;
249  const char *key = NULL;
250  uint16_t langcode = 0;
251  uint32_t data_type = 0, str_size, str_size_alloc;
252  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
253  int raw = 0;
254 
255  switch (atom.type) {
256  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
257  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
258  case MKTAG( 'X','M','P','_'):
259  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
260  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
261  case MKTAG( 'a','k','I','D'): key = "account_type";
262  parse = mov_metadata_int8_no_padding; break;
263  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
264  case MKTAG( 'c','a','t','g'): key = "category"; break;
265  case MKTAG( 'c','p','i','l'): key = "compilation";
266  parse = mov_metadata_int8_no_padding; break;
267  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
268  case MKTAG( 'd','e','s','c'): key = "description"; break;
269  case MKTAG( 'd','i','s','k'): key = "disc";
270  parse = mov_metadata_track_or_disc_number; break;
271  case MKTAG( 'e','g','i','d'): key = "episode_uid";
272  parse = mov_metadata_int8_no_padding; break;
273  case MKTAG( 'g','n','r','e'): key = "genre";
274  parse = mov_metadata_gnre; break;
275  case MKTAG( 'h','d','v','d'): key = "hd_video";
276  parse = mov_metadata_int8_no_padding; break;
277  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
278  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
279  case MKTAG( 'l','o','c','i'):
280  return mov_metadata_loci(c, pb, atom.size);
281  case MKTAG( 'p','c','s','t'): key = "podcast";
282  parse = mov_metadata_int8_no_padding; break;
283  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
284  parse = mov_metadata_int8_no_padding; break;
285  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
286  case MKTAG( 'r','t','n','g'): key = "rating";
287  parse = mov_metadata_int8_no_padding; break;
288  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
289  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
290  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
291  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
292  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
293  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
294  case MKTAG( 's','t','i','k'): key = "media_type";
295  parse = mov_metadata_int8_no_padding; break;
296  case MKTAG( 't','r','k','n'): key = "track";
297  parse = mov_metadata_track_or_disc_number; break;
298  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
299  case MKTAG( 't','v','e','s'): key = "episode_sort";
300  parse = mov_metadata_int8_bypass_padding; break;
301  case MKTAG( 't','v','n','n'): key = "network"; break;
302  case MKTAG( 't','v','s','h'): key = "show"; break;
303  case MKTAG( 't','v','s','n'): key = "season_number";
304  parse = mov_metadata_int8_bypass_padding; break;
305  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
306  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
307  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
308  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
309  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
310  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
311  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
312  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
313  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
314  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
315  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
316  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
317  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
318  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
319  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
320  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
321  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
322  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
323  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
324  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
325  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
326  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
327  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
328  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
329  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
330  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
331  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
332  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
333  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
334  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
335  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
336  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
337  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
338  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
339  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
340  }
341 retry:
342  if (c->itunes_metadata && atom.size > 8) {
343  int data_size = avio_rb32(pb);
344  int tag = avio_rl32(pb);
345  if (tag == MKTAG('d','a','t','a')) {
346  data_type = avio_rb32(pb); // type
347  avio_rb32(pb); // unknown
348  str_size = data_size - 16;
349  atom.size -= 16;
350 
351  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
352  int ret = mov_read_covr(c, pb, data_type, str_size);
353  if (ret < 0) {
354  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
355  }
356  return ret;
357  }
358  } else return 0;
359  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
360  str_size = avio_rb16(pb); // string length
361  if (str_size > atom.size) {
362  raw = 1;
363  avio_seek(pb, -2, SEEK_CUR);
364  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
365  goto retry;
366  }
367  langcode = avio_rb16(pb);
368  ff_mov_lang_to_iso639(langcode, language);
369  atom.size -= 4;
370  } else
371  str_size = atom.size;
372 
373  if (c->export_all && !key) {
374  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
375  key = tmp_key;
376  }
377 
378  if (!key)
379  return 0;
380  if (atom.size < 0 || str_size >= INT_MAX/2)
381  return AVERROR_INVALIDDATA;
382 
383  // worst-case requirement for output string in case of utf8 coded input
384  str_size_alloc = (raw ? str_size : str_size * 2) + 1;
385  str = av_mallocz(str_size_alloc);
386  if (!str)
387  return AVERROR(ENOMEM);
388 
389  if (parse)
390  parse(c, pb, str_size, key);
391  else {
392  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
393  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
394  } else {
395  int ret = avio_read(pb, str, str_size);
396  if (ret != str_size) {
397  av_freep(&str);
398  return ret < 0 ? ret : AVERROR_INVALIDDATA;
399  }
400  str[str_size] = 0;
401  }
402  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
403  av_dict_set(&c->fc->metadata, key, str, 0);
404  if (*language && strcmp(language, "und")) {
405  snprintf(key2, sizeof(key2), "%s-%s", key, language);
406  av_dict_set(&c->fc->metadata, key2, str, 0);
407  }
408  }
409  av_dlog(c->fc, "lang \"%3s\" ", language);
410  av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
411  key, str, (char*)&atom.type, str_size_alloc, atom.size);
412 
413  av_freep(&str);
414  return 0;
415 }
416 
417 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
418 {
419  int64_t start;
420  int i, nb_chapters, str_len, version;
421  char str[256+1];
422 
423  if ((atom.size -= 5) < 0)
424  return 0;
425 
426  version = avio_r8(pb);
427  avio_rb24(pb);
428  if (version)
429  avio_rb32(pb); // ???
430  nb_chapters = avio_r8(pb);
431 
432  for (i = 0; i < nb_chapters; i++) {
433  if (atom.size < 9)
434  return 0;
435 
436  start = avio_rb64(pb);
437  str_len = avio_r8(pb);
438 
439  if ((atom.size -= 9+str_len) < 0)
440  return 0;
441 
442  avio_read(pb, str, str_len);
443  str[str_len] = 0;
444  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
445  }
446  return 0;
447 }
448 
449 #define MIN_DATA_ENTRY_BOX_SIZE 12
450 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
451 {
452  AVStream *st;
453  MOVStreamContext *sc;
454  int entries, i, j;
455 
456  if (c->fc->nb_streams < 1)
457  return 0;
458  st = c->fc->streams[c->fc->nb_streams-1];
459  sc = st->priv_data;
460 
461  avio_rb32(pb); // version + flags
462  entries = avio_rb32(pb);
463  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
464  entries >= UINT_MAX / sizeof(*sc->drefs))
465  return AVERROR_INVALIDDATA;
466  av_free(sc->drefs);
467  sc->drefs_count = 0;
468  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
469  if (!sc->drefs)
470  return AVERROR(ENOMEM);
471  sc->drefs_count = entries;
472 
473  for (i = 0; i < sc->drefs_count; i++) {
474  MOVDref *dref = &sc->drefs[i];
475  uint32_t size = avio_rb32(pb);
476  int64_t next = avio_tell(pb) + size - 4;
477 
478  if (size < 12)
479  return AVERROR_INVALIDDATA;
480 
481  dref->type = avio_rl32(pb);
482  avio_rb32(pb); // version + flags
483  av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
484 
485  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
486  /* macintosh alias record */
487  uint16_t volume_len, len;
488  int16_t type;
489 
490  avio_skip(pb, 10);
491 
492  volume_len = avio_r8(pb);
493  volume_len = FFMIN(volume_len, 27);
494  avio_read(pb, dref->volume, 27);
495  dref->volume[volume_len] = 0;
496  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
497 
498  avio_skip(pb, 12);
499 
500  len = avio_r8(pb);
501  len = FFMIN(len, 63);
502  avio_read(pb, dref->filename, 63);
503  dref->filename[len] = 0;
504  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
505 
506  avio_skip(pb, 16);
507 
508  /* read next level up_from_alias/down_to_target */
509  dref->nlvl_from = avio_rb16(pb);
510  dref->nlvl_to = avio_rb16(pb);
511  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
512  dref->nlvl_from, dref->nlvl_to);
513 
514  avio_skip(pb, 16);
515 
516  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
517  if(avio_feof(pb))
518  return AVERROR_EOF;
519  type = avio_rb16(pb);
520  len = avio_rb16(pb);
521  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
522  if (len&1)
523  len += 1;
524  if (type == 2) { // absolute path
525  av_free(dref->path);
526  dref->path = av_mallocz(len+1);
527  if (!dref->path)
528  return AVERROR(ENOMEM);
529  avio_read(pb, dref->path, len);
530  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
531  len -= volume_len;
532  memmove(dref->path, dref->path+volume_len, len);
533  dref->path[len] = 0;
534  }
535  for (j = 0; j < len; j++)
536  if (dref->path[j] == ':')
537  dref->path[j] = '/';
538  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
539  } else if (type == 0) { // directory name
540  av_free(dref->dir);
541  dref->dir = av_malloc(len+1);
542  if (!dref->dir)
543  return AVERROR(ENOMEM);
544  if (avio_read(pb, dref->dir, len) != len)
545  return AVERROR_INVALIDDATA;
546  dref->dir[len] = 0;
547  for (j = 0; j < len; j++)
548  if (dref->dir[j] == ':')
549  dref->dir[j] = '/';
550  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
551  } else
552  avio_skip(pb, len);
553  }
554  }
555  avio_seek(pb, next, SEEK_SET);
556  }
557  return 0;
558 }
559 
560 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
561 {
562  AVStream *st;
563  uint32_t type;
564  uint32_t av_unused ctype;
565  int64_t title_size;
566  char *title_str;
567 
568  if (c->fc->nb_streams < 1) // meta before first trak
569  return 0;
570 
571  st = c->fc->streams[c->fc->nb_streams-1];
572 
573  avio_r8(pb); /* version */
574  avio_rb24(pb); /* flags */
575 
576  /* component type */
577  ctype = avio_rl32(pb);
578  type = avio_rl32(pb); /* component subtype */
579 
580  av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
581  av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
582 
583  if (type == MKTAG('v','i','d','e'))
584  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
585  else if (type == MKTAG('s','o','u','n'))
586  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
587  else if (type == MKTAG('m','1','a',' '))
588  st->codec->codec_id = AV_CODEC_ID_MP2;
589  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
590  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
591 
592  avio_rb32(pb); /* component manufacture */
593  avio_rb32(pb); /* component flags */
594  avio_rb32(pb); /* component flags mask */
595 
596  title_size = atom.size - 24;
597  if (title_size > 0) {
598  title_str = av_malloc(title_size + 1); /* Add null terminator */
599  if (!title_str)
600  return AVERROR(ENOMEM);
601  avio_read(pb, title_str, title_size);
602  title_str[title_size] = 0;
603  if (title_str[0]) {
604  int off = (!c->isom && title_str[0] == title_size - 1);
605  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
606  }
607  av_freep(&title_str);
608  }
609 
610  return 0;
611 }
612 
613 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
614 {
615  AVStream *st;
616  int tag;
617 
618  if (fc->nb_streams < 1)
619  return 0;
620  st = fc->streams[fc->nb_streams-1];
621 
622  avio_rb32(pb); /* version + flags */
623  ff_mp4_read_descr(fc, pb, &tag);
624  if (tag == MP4ESDescrTag) {
625  ff_mp4_parse_es_descr(pb, NULL);
626  } else
627  avio_rb16(pb); /* ID */
628 
629  ff_mp4_read_descr(fc, pb, &tag);
630  if (tag == MP4DecConfigDescrTag)
631  ff_mp4_read_dec_config_descr(fc, st, pb);
632  return 0;
633 }
634 
635 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
636 {
637  return ff_mov_read_esds(c->fc, pb);
638 }
639 
640 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
641 {
642  AVStream *st;
643  enum AVAudioServiceType *ast;
644  int ac3info, acmod, lfeon, bsmod;
645 
646  if (c->fc->nb_streams < 1)
647  return 0;
648  st = c->fc->streams[c->fc->nb_streams-1];
649 
650  ast = (enum AVAudioServiceType*)ff_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
651  sizeof(*ast));
652  if (!ast)
653  return AVERROR(ENOMEM);
654 
655  ac3info = avio_rb24(pb);
656  bsmod = (ac3info >> 14) & 0x7;
657  acmod = (ac3info >> 11) & 0x7;
658  lfeon = (ac3info >> 10) & 0x1;
659  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
660  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
661  if (lfeon)
662  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
663  *ast = bsmod;
664  if (st->codec->channels > 1 && bsmod == 0x7)
665  *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
666 
667  st->codec->audio_service_type = *ast;
668 
669  return 0;
670 }
671 
672 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
673 {
674  AVStream *st;
675  enum AVAudioServiceType *ast;
676  int eac3info, acmod, lfeon, bsmod;
677 
678  if (c->fc->nb_streams < 1)
679  return 0;
680  st = c->fc->streams[c->fc->nb_streams-1];
681 
682  ast = (enum AVAudioServiceType*)ff_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
683  sizeof(*ast));
684  if (!ast)
685  return AVERROR(ENOMEM);
686 
687  /* No need to parse fields for additional independent substreams and its
688  * associated dependent substreams since libavcodec's E-AC-3 decoder
689  * does not support them yet. */
690  avio_rb16(pb); /* data_rate and num_ind_sub */
691  eac3info = avio_rb24(pb);
692  bsmod = (eac3info >> 12) & 0x1f;
693  acmod = (eac3info >> 9) & 0x7;
694  lfeon = (eac3info >> 8) & 0x1;
695  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
696  if (lfeon)
697  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
698  st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
699  *ast = bsmod;
700  if (st->codec->channels > 1 && bsmod == 0x7)
701  *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
702 
703  st->codec->audio_service_type = *ast;
704 
705  return 0;
706 }
707 
708 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
709 {
710  AVStream *st;
711 
712  if (c->fc->nb_streams < 1)
713  return 0;
714  st = c->fc->streams[c->fc->nb_streams-1];
715 
716  if (atom.size < 16)
717  return 0;
718 
719  /* skip version and flags */
720  avio_skip(pb, 4);
721 
722  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
723 
724  return 0;
725 }
726 
727 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
728 {
729  AVStream *st;
730  int ret;
731 
732  if (c->fc->nb_streams < 1)
733  return 0;
734  st = c->fc->streams[c->fc->nb_streams-1];
735 
736  if ((ret = ff_get_wav_header(pb, st->codec, atom.size, 0)) < 0)
737  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
738 
739  return ret;
740 }
741 
742 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
743 {
744  const int num = avio_rb32(pb);
745  const int den = avio_rb32(pb);
746  AVStream *st;
747 
748  if (c->fc->nb_streams < 1)
749  return 0;
750  st = c->fc->streams[c->fc->nb_streams-1];
751 
752  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
753  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
754  av_log(c->fc, AV_LOG_WARNING,
755  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
756  st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
757  num, den);
758  } else if (den != 0) {
759  av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den,
760  num, den, 32767);
761  }
762  return 0;
763 }
764 
765 /* this atom contains actual media data */
766 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
767 {
768  if (atom.size == 0) /* wrong one (MP4) */
769  return 0;
770  c->found_mdat=1;
771  return 0; /* now go for moov */
772 }
773 
774 /* read major brand, minor version and compatible brands and store them as metadata */
775 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
776 {
777  uint32_t minor_ver;
778  int comp_brand_size;
779  char* comp_brands_str;
780  uint8_t type[5] = {0};
781 
782  avio_read(pb, type, 4);
783  if (strcmp(type, "qt "))
784  c->isom = 1;
785  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
786  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
787  minor_ver = avio_rb32(pb); /* minor version */
788  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
789 
790  comp_brand_size = atom.size - 8;
791  if (comp_brand_size < 0)
792  return AVERROR_INVALIDDATA;
793  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
794  if (!comp_brands_str)
795  return AVERROR(ENOMEM);
796  avio_read(pb, comp_brands_str, comp_brand_size);
797  comp_brands_str[comp_brand_size] = 0;
798  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
799  av_freep(&comp_brands_str);
800 
801  return 0;
802 }
803 
804 /* this atom should contain all header atoms */
805 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
806 {
807  int ret;
808 
809  if (c->found_moov) {
810  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
811  avio_skip(pb, atom.size);
812  return 0;
813  }
814 
815  if ((ret = mov_read_default(c, pb, atom)) < 0)
816  return ret;
817  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
818  /* so we don't parse the whole file if over a network */
819  c->found_moov=1;
820  return 0; /* now go for mdat */
821 }
822 
823 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
824 {
825  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
826  c->has_looked_for_mfra = 1;
827  if (pb->seekable) {
828  int ret;
829  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
830  "for a mfra\n");
831  if ((ret = mov_read_mfra(c, pb)) < 0) {
832  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
833  "read the mfra (may be a live ismv)\n");
834  }
835  } else {
836  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
837  "seekable, can not look for mfra\n");
838  }
839  }
840  c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
841  av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
842  return mov_read_default(c, pb, atom);
843 }
844 
845 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
846 {
847  char buffer[32];
848  if (time) {
849  struct tm *ptm, tmbuf;
850  time_t timet;
851  if(time >= 2082844800)
852  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
853  timet = time;
854  ptm = gmtime_r(&timet, &tmbuf);
855  if (!ptm) return;
856  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
857  av_dict_set(metadata, "creation_time", buffer, 0);
858  }
859 }
860 
861 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
862 {
863  AVStream *st;
864  MOVStreamContext *sc;
865  int version;
866  char language[4] = {0};
867  unsigned lang;
868  int64_t creation_time;
869 
870  if (c->fc->nb_streams < 1)
871  return 0;
872  st = c->fc->streams[c->fc->nb_streams-1];
873  sc = st->priv_data;
874 
875  if (sc->time_scale) {
876  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
877  return AVERROR_INVALIDDATA;
878  }
879 
880  version = avio_r8(pb);
881  if (version > 1) {
882  avpriv_request_sample(c->fc, "Version %d", version);
883  return AVERROR_PATCHWELCOME;
884  }
885  avio_rb24(pb); /* flags */
886  if (version == 1) {
887  creation_time = avio_rb64(pb);
888  avio_rb64(pb);
889  } else {
890  creation_time = avio_rb32(pb);
891  avio_rb32(pb); /* modification time */
892  }
893  mov_metadata_creation_time(&st->metadata, creation_time);
894 
895  sc->time_scale = avio_rb32(pb);
896  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
897 
898  lang = avio_rb16(pb); /* language */
899  if (ff_mov_lang_to_iso639(lang, language))
900  av_dict_set(&st->metadata, "language", language, 0);
901  avio_rb16(pb); /* quality */
902 
903  return 0;
904 }
905 
906 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
907 {
908  int64_t creation_time;
909  int version = avio_r8(pb); /* version */
910  avio_rb24(pb); /* flags */
911 
912  if (version == 1) {
913  creation_time = avio_rb64(pb);
914  avio_rb64(pb);
915  } else {
916  creation_time = avio_rb32(pb);
917  avio_rb32(pb); /* modification time */
918  }
919  mov_metadata_creation_time(&c->fc->metadata, creation_time);
920  c->time_scale = avio_rb32(pb); /* time scale */
921 
922  av_dlog(c->fc, "time scale = %i\n", c->time_scale);
923 
924  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
925  // set the AVCodecContext duration because the duration of individual tracks
926  // may be inaccurate
927  if (c->time_scale > 0 && !c->trex_data)
928  c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
929  avio_rb32(pb); /* preferred scale */
930 
931  avio_rb16(pb); /* preferred volume */
932 
933  avio_skip(pb, 10); /* reserved */
934 
935  avio_skip(pb, 36); /* display matrix */
936 
937  avio_rb32(pb); /* preview time */
938  avio_rb32(pb); /* preview duration */
939  avio_rb32(pb); /* poster time */
940  avio_rb32(pb); /* selection time */
941  avio_rb32(pb); /* selection duration */
942  avio_rb32(pb); /* current time */
943  avio_rb32(pb); /* next track ID */
944  return 0;
945 }
946 
947 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
948 {
949  AVStream *st;
950  int little_endian;
951 
952  if (c->fc->nb_streams < 1)
953  return 0;
954  st = c->fc->streams[c->fc->nb_streams-1];
955 
956  little_endian = avio_rb16(pb) & 0xFF;
957  av_dlog(c->fc, "enda %d\n", little_endian);
958  if (little_endian == 1) {
959  switch (st->codec->codec_id) {
960  case AV_CODEC_ID_PCM_S24BE:
961  st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
962  break;
963  case AV_CODEC_ID_PCM_S32BE:
964  st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
965  break;
966  case AV_CODEC_ID_PCM_F32BE:
967  st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
968  break;
969  case AV_CODEC_ID_PCM_F64BE:
970  st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
971  break;
972  default:
973  break;
974  }
975  }
976  return 0;
977 }
978 
979 static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
980 {
981  AVStream *st;
982  char color_parameter_type[5] = { 0 };
983  int color_primaries, color_trc, color_matrix;
984 
985  if (c->fc->nb_streams < 1)
986  return 0;
987  st = c->fc->streams[c->fc->nb_streams - 1];
988 
989  avio_read(pb, color_parameter_type, 4);
990  if (strncmp(color_parameter_type, "nclx", 4) &&
991  strncmp(color_parameter_type, "nclc", 4)) {
992  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
993  color_parameter_type);
994  return 0;
995  }
996 
997  color_primaries = avio_rb16(pb);
998  color_trc = avio_rb16(pb);
999  color_matrix = avio_rb16(pb);
1000 
1001  av_dlog(c->fc, "%s: pri %d trc %d matrix %d",
1002  color_parameter_type, color_primaries, color_trc, color_matrix);
1003 
1004  if (c->isom) {
1005  uint8_t color_range = avio_r8(pb) >> 7;
1006  av_dlog(c->fc, " full %"PRIu8"", color_range);
1007  if (color_range)
1008  st->codec->color_range = AVCOL_RANGE_JPEG;
1009  else
1010  st->codec->color_range = AVCOL_RANGE_MPEG;
1011  /* 14496-12 references JPEG XR specs (rather than the more complete
1012  * 23001-8) so some adjusting is required */
1013  if (color_primaries >= AVCOL_PRI_FILM)
1014  color_primaries = AVCOL_PRI_UNSPECIFIED;
1015  if ((color_trc >= AVCOL_TRC_LINEAR &&
1016  color_trc <= AVCOL_TRC_LOG_SQRT) ||
1017  color_trc >= AVCOL_TRC_BT2020_10)
1018  color_trc = AVCOL_TRC_UNSPECIFIED;
1019  if (color_matrix >= AVCOL_SPC_BT2020_NCL)
1020  color_matrix = AVCOL_SPC_UNSPECIFIED;
1021  st->codec->color_primaries = color_primaries;
1022  st->codec->color_trc = color_trc;
1023  st->codec->colorspace = color_matrix;
1024  } else {
1025  /* color primaries, Table 4-4 */
1026  switch (color_primaries) {
1027  case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
1028  case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
1029  case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
1030  }
1031  /* color transfer, Table 4-5 */
1032  switch (color_trc) {
1033  case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
1034  case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
1035  }
1036  /* color matrix, Table 4-6 */
1037  switch (color_matrix) {
1038  case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
1039  case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
1040  case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
1041  }
1042  }
1043  av_dlog(c->fc, "\n");
1044 
1045  return 0;
1046 }
1047 
1048 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1049 {
1050  AVStream *st;
1051  unsigned mov_field_order;
1052  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1053 
1054  if (c->fc->nb_streams < 1) // will happen with jp2 files
1055  return 0;
1056  st = c->fc->streams[c->fc->nb_streams-1];
1057  if (atom.size < 2)
1058  return AVERROR_INVALIDDATA;
1059  mov_field_order = avio_rb16(pb);
1060  if ((mov_field_order & 0xFF00) == 0x0100)
1061  decoded_field_order = AV_FIELD_PROGRESSIVE;
1062  else if ((mov_field_order & 0xFF00) == 0x0200) {
1063  switch (mov_field_order & 0xFF) {
1064  case 0x01: decoded_field_order = AV_FIELD_TT;
1065  break;
1066  case 0x06: decoded_field_order = AV_FIELD_BB;
1067  break;
1068  case 0x09: decoded_field_order = AV_FIELD_TB;
1069  break;
1070  case 0x0E: decoded_field_order = AV_FIELD_BT;
1071  break;
1072  }
1073  }
1074  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1075  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1076  }
1077  st->codec->field_order = decoded_field_order;
1078 
1079  return 0;
1080 }
1081 
1082 static int mov_realloc_extradata(AVCodecContext *codec, MOVAtom atom)
1083 {
1084  int err = 0;
1085  uint64_t size = (uint64_t)codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
1086  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1087  return AVERROR_INVALIDDATA;
1088  if ((err = av_reallocp(&codec->extradata, size)) < 0) {
1089  codec->extradata_size = 0;
1090  return err;
1091  }
1092  codec->extradata_size = size - FF_INPUT_BUFFER_PADDING_SIZE;
1093  return 0;
1094 }
1095 
1096 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1097 static int64_t mov_read_atom_into_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1098  AVCodecContext *codec, uint8_t *buf)
1099 {
1100  int64_t result = atom.size;
1101  int err;
1102 
1103  AV_WB32(buf , atom.size + 8);
1104  AV_WL32(buf + 4, atom.type);
1105  err = avio_read(pb, buf + 8, atom.size);
1106  if (err < 0) {
1107  codec->extradata_size -= atom.size;
1108  return err;
1109  } else if (err < atom.size) {
1110  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1111  codec->extradata_size -= atom.size - err;
1112  result = err;
1113  }
1114  memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1115  return result;
1116 }
1117 
1118 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1119 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1120  enum AVCodecID codec_id)
1121 {
1122  AVStream *st;
1123  uint64_t original_size;
1124  int err;
1125 
1126  if (c->fc->nb_streams < 1) // will happen with jp2 files
1127  return 0;
1128  st = c->fc->streams[c->fc->nb_streams-1];
1129 
1130  if (st->codec->codec_id != codec_id)
1131  return 0; /* unexpected codec_id - don't mess with extradata */
1132 
1133  original_size = st->codec->extradata_size;
1134  err = mov_realloc_extradata(st->codec, atom);
1135  if (err)
1136  return err;
1137 
1138  err = mov_read_atom_into_extradata(c, pb, atom, st->codec, st->codec->extradata + original_size);
1139  if (err < 0)
1140  return err;
1141  return 0; // Note: this is the original behavior to ignore truncation.
1142 }
1143 
1144 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1145 static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1146 {
1147  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1148 }
1149 
1150 static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1151 {
1152  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1153 }
1154 
1155 static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1156 {
1157  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1158 }
1159 
1160 static int mov_read_dpxe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1161 {
1162  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1163 }
1164 
1165 static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1166 {
1167  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1168  if(ret == 0)
1169  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1170  return ret;
1171 }
1172 
1173 static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1174 {
1175  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1176 
1177  if (!ret && c->fc->nb_streams >= 1) {
1178  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1179  if (avctx->extradata_size >= 40) {
1180  avctx->height = AV_RB16(&avctx->extradata[36]);
1181  avctx->width = AV_RB16(&avctx->extradata[38]);
1182  }
1183  }
1184  return ret;
1185 }
1186 
1187 static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1188 {
1189  if (c->fc->nb_streams >= 1) {
1190  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1191  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1192  codec->codec_id == AV_CODEC_ID_H264 &&
1193  atom.size > 11) {
1194  avio_skip(pb, 10);
1195  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1196  if (avio_rb16(pb) == 0xd4d)
1197  codec->width = 1440;
1198  return 0;
1199  }
1200  }
1201 
1202  return mov_read_avid(c, pb, atom);
1203 }
1204 
1205 static int mov_read_aclr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1206 {
1207  int ret = 0;
1208  int length = 0;
1209  uint64_t original_size;
1210  if (c->fc->nb_streams >= 1) {
1211  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1212  if (atom.size == 16) {
1213  original_size = codec->extradata_size;
1214  ret = mov_realloc_extradata(codec, atom);
1215  if (!ret) {
1216  length = mov_read_atom_into_extradata(c, pb, atom, codec, codec->extradata + original_size);
1217  if (length == atom.size) {
1218  const uint8_t range_value = codec->extradata[original_size + 19];
1219  switch (range_value) {
1220  case 1:
1221  codec->color_range = AVCOL_RANGE_MPEG;
1222  break;
1223  case 2:
1224  codec->color_range = AVCOL_RANGE_JPEG;
1225  break;
1226  default:
1227  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1228  break;
1229  }
1230  av_dlog(c, "color_range: %"PRIu8"\n", codec->color_range);
1231  } else {
1232  /* For some reason the whole atom was not added to the extradata */
1233  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1234  }
1235  } else {
1236  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1237  }
1238  } else {
1239  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1240  }
1241  }
1242 
1243  return ret;
1244 }
1245 
1246 static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1247 {
1248  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1249 }
1250 
1251 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1252 {
1253  AVStream *st;
1254 
1255  if (c->fc->nb_streams < 1)
1256  return 0;
1257  st = c->fc->streams[c->fc->nb_streams-1];
1258 
1259  if ((uint64_t)atom.size > (1<<30))
1260  return AVERROR_INVALIDDATA;
1261 
1262  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1263  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1264  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1265  // pass all frma atom to codec, needed at least for QDMC and QDM2
1266  av_freep(&st->codec->extradata);
1267  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1268  return AVERROR(ENOMEM);
1269  } else if (atom.size > 8) { /* to read frma, esds atoms */
1270  int ret;
1271  if ((ret = mov_read_default(c, pb, atom)) < 0)
1272  return ret;
1273  } else
1274  avio_skip(pb, atom.size);
1275  return 0;
1276 }
1277 
1278 /**
1279  * This function reads atom content and puts data in extradata without tag
1280  * nor size unlike mov_read_extradata.
1281  */
1282 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1283 {
1284  AVStream *st;
1285 
1286  if (c->fc->nb_streams < 1)
1287  return 0;
1288  st = c->fc->streams[c->fc->nb_streams-1];
1289 
1290  if ((uint64_t)atom.size > (1<<30))
1291  return AVERROR_INVALIDDATA;
1292 
1293  if (atom.size >= 10) {
1294  // Broken files created by legacy versions of libavformat will
1295  // wrap a whole fiel atom inside of a glbl atom.
1296  unsigned size = avio_rb32(pb);
1297  unsigned type = avio_rl32(pb);
1298  avio_seek(pb, -8, SEEK_CUR);
1299  if (type == MKTAG('f','i','e','l') && size == atom.size)
1300  return mov_read_default(c, pb, atom);
1301  }
1302  if (st->codec->extradata_size > 1 && st->codec->extradata) {
1303  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1304  return 0;
1305  }
1306  av_freep(&st->codec->extradata);
1307  if (ff_get_extradata(st->codec, pb, atom.size) < 0)
1308  return AVERROR(ENOMEM);
1309 
1310  return 0;
1311 }
1312 
1313 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1314 {
1315  AVStream *st;
1316  uint8_t profile_level;
1317  int ret;
1318 
1319  if (c->fc->nb_streams < 1)
1320  return 0;
1321  st = c->fc->streams[c->fc->nb_streams-1];
1322 
1323  if (atom.size >= (1<<28) || atom.size < 7)
1324  return AVERROR_INVALIDDATA;
1325 
1326  profile_level = avio_r8(pb);
1327  if ((profile_level & 0xf0) != 0xc0)
1328  return 0;
1329 
1330  avio_seek(pb, 6, SEEK_CUR);
1331  av_freep(&st->codec->extradata);
1332  if ((ret = ff_get_extradata(st->codec, pb, atom.size - 7)) < 0)
1333  return ret;
1334 
1335  return 0;
1336 }
1337 
1338 /**
1339  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1340  * but can have extradata appended at the end after the 40 bytes belonging
1341  * to the struct.
1342  */
1343 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1344 {
1345  AVStream *st;
1346 
1347  if (c->fc->nb_streams < 1)
1348  return 0;
1349  if (atom.size <= 40)
1350  return 0;
1351  st = c->fc->streams[c->fc->nb_streams-1];
1352 
1353  if ((uint64_t)atom.size > (1<<30))
1354  return AVERROR_INVALIDDATA;
1355 
1356  avio_skip(pb, 40);
1357  av_freep(&st->codec->extradata);
1358  if (ff_get_extradata(st->codec, pb, atom.size - 40) < 0)
1359  return AVERROR(ENOMEM);
1360  return 0;
1361 }
1362 
1363 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1364 {
1365  AVStream *st;
1366  MOVStreamContext *sc;
1367  unsigned int i, entries;
1368 
1369  if (c->fc->nb_streams < 1)
1370  return 0;
1371  st = c->fc->streams[c->fc->nb_streams-1];
1372  sc = st->priv_data;
1373 
1374  avio_r8(pb); /* version */
1375  avio_rb24(pb); /* flags */
1376 
1377  entries = avio_rb32(pb);
1378 
1379  if (!entries)
1380  return 0;
1381 
1382  if (sc->chunk_offsets)
1383  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1384  av_free(sc->chunk_offsets);
1385  sc->chunk_count = 0;
1386  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1387  if (!sc->chunk_offsets)
1388  return AVERROR(ENOMEM);
1389  sc->chunk_count = entries;
1390 
1391  if (atom.type == MKTAG('s','t','c','o'))
1392  for (i = 0; i < entries && !pb->eof_reached; i++)
1393  sc->chunk_offsets[i] = avio_rb32(pb);
1394  else if (atom.type == MKTAG('c','o','6','4'))
1395  for (i = 0; i < entries && !pb->eof_reached; i++)
1396  sc->chunk_offsets[i] = avio_rb64(pb);
1397  else
1398  return AVERROR_INVALIDDATA;
1399 
1400  sc->chunk_count = i;
1401 
1402  if (pb->eof_reached)
1403  return AVERROR_EOF;
1404 
1405  return 0;
1406 }
1407 
1408 /**
1409  * Compute codec id for 'lpcm' tag.
1410  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1411  */
1412 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1413 {
1414  /* lpcm flags:
1415  * 0x1 = float
1416  * 0x2 = big-endian
1417  * 0x4 = signed
1418  */
1419  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1420 }
1421 
1422 static int mov_codec_id(AVStream *st, uint32_t format)
1423 {
1424  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1425 
1426  if (id <= 0 &&
1427  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1428  (format & 0xFFFF) == 'T' + ('S' << 8)))
1429  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1430 
1431  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1432  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1433  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1434  /* skip old asf mpeg4 tag */
1435  format && format != MKTAG('m','p','4','s')) {
1436  id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1437  if (id <= 0)
1438  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1439  if (id > 0)
1440  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1441  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1442  (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1443  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1444  id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1445  if (id > 0)
1446  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1447  }
1448  }
1449 
1450  st->codec->codec_tag = format;
1451 
1452  return id;
1453 }
1454 
1455 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1456  AVStream *st, MOVStreamContext *sc)
1457 {
1458  uint8_t codec_name[32];
1459  unsigned int color_depth, len, j;
1460  int color_greyscale;
1461  int color_table_id;
1462 
1463  avio_rb16(pb); /* version */
1464  avio_rb16(pb); /* revision level */
1465  avio_rb32(pb); /* vendor */
1466  avio_rb32(pb); /* temporal quality */
1467  avio_rb32(pb); /* spatial quality */
1468 
1469  st->codec->width = avio_rb16(pb); /* width */
1470  st->codec->height = avio_rb16(pb); /* height */
1471 
1472  avio_rb32(pb); /* horiz resolution */
1473  avio_rb32(pb); /* vert resolution */
1474  avio_rb32(pb); /* data size, always 0 */
1475  avio_rb16(pb); /* frames per samples */
1476 
1477  len = avio_r8(pb); /* codec name, pascal string */
1478  if (len > 31)
1479  len = 31;
1480  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1481  if (len < 31)
1482  avio_skip(pb, 31 - len);
1483 
1484  if (codec_name[0])
1485  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1486 
1487  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1488  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1489  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1490  st->codec->width &= ~1;
1491  st->codec->height &= ~1;
1492  }
1493  /* Flash Media Server uses tag H263 with Sorenson Spark */
1494  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1495  !memcmp(codec_name, "Sorenson H263", 13))
1496  st->codec->codec_id = AV_CODEC_ID_FLV1;
1497 
1498  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1499  color_table_id = avio_rb16(pb); /* colortable id */
1500  av_dlog(c->fc, "depth %d, ctab id %d\n",
1501  st->codec->bits_per_coded_sample, color_table_id);
1502  /* figure out the palette situation */
1503  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1504  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1505  /* Do not create a greyscale palette for cinepak */
1506  if (color_greyscale && st->codec->codec_id == AV_CODEC_ID_CINEPAK)
1507  return;
1508 
1509  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1510  if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1511  /* for palette traversal */
1512  unsigned int color_start, color_count, color_end;
1513  unsigned char a, r, g, b;
1514 
1515  if (color_greyscale) {
1516  int color_index, color_dec;
1517  /* compute the greyscale palette */
1518  st->codec->bits_per_coded_sample = color_depth;
1519  color_count = 1 << color_depth;
1520  color_index = 255;
1521  color_dec = 256 / (color_count - 1);
1522  for (j = 0; j < color_count; j++) {
1523  r = g = b = color_index;
1524  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1525  color_index -= color_dec;
1526  if (color_index < 0)
1527  color_index = 0;
1528  }
1529  } else if (color_table_id) {
1530  const uint8_t *color_table;
1531  /* if flag bit 3 is set, use the default palette */
1532  color_count = 1 << color_depth;
1533  if (color_depth == 2)
1534  color_table = ff_qt_default_palette_4;
1535  else if (color_depth == 4)
1536  color_table = ff_qt_default_palette_16;
1537  else
1538  color_table = ff_qt_default_palette_256;
1539 
1540  for (j = 0; j < color_count; j++) {
1541  r = color_table[j * 3 + 0];
1542  g = color_table[j * 3 + 1];
1543  b = color_table[j * 3 + 2];
1544  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1545  }
1546  } else {
1547  /* load the palette from the file */
1548  color_start = avio_rb32(pb);
1549  color_count = avio_rb16(pb);
1550  color_end = avio_rb16(pb);
1551  if ((color_start <= 255) && (color_end <= 255)) {
1552  for (j = color_start; j <= color_end; j++) {
1553  /* each A, R, G, or B component is 16 bits;
1554  * only use the top 8 bits */
1555  a = avio_r8(pb);
1556  avio_r8(pb);
1557  r = avio_r8(pb);
1558  avio_r8(pb);
1559  g = avio_r8(pb);
1560  avio_r8(pb);
1561  b = avio_r8(pb);
1562  avio_r8(pb);
1563  sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1564  }
1565  }
1566  }
1567  sc->has_palette = 1;
1568  }
1569 }
1570 
1571 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1572  AVStream *st, MOVStreamContext *sc)
1573 {
1574  int bits_per_sample, flags;
1575  uint16_t version = avio_rb16(pb);
1576  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1577 
1578  avio_rb16(pb); /* revision level */
1579  avio_rb32(pb); /* vendor */
1580 
1581  st->codec->channels = avio_rb16(pb); /* channel count */
1582  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1583  av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1584 
1585  sc->audio_cid = avio_rb16(pb);
1586  avio_rb16(pb); /* packet size = 0 */
1587 
1588  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1589 
1590  // Read QT version 1 fields. In version 0 these do not exist.
1591  av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
1592  if (!c->isom ||
1593  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1594 
1595  if (version == 1) {
1596  sc->samples_per_frame = avio_rb32(pb);
1597  avio_rb32(pb); /* bytes per packet */
1598  sc->bytes_per_frame = avio_rb32(pb);
1599  avio_rb32(pb); /* bytes per sample */
1600  } else if (version == 2) {
1601  avio_rb32(pb); /* sizeof struct only */
1602  st->codec->sample_rate = av_int2double(avio_rb64(pb));
1603  st->codec->channels = avio_rb32(pb);
1604  avio_rb32(pb); /* always 0x7F000000 */
1605  st->codec->bits_per_coded_sample = avio_rb32(pb);
1606 
1607  flags = avio_rb32(pb); /* lpcm format specific flag */
1608  sc->bytes_per_frame = avio_rb32(pb);
1609  sc->samples_per_frame = avio_rb32(pb);
1610  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1611  st->codec->codec_id =
1612  ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
1613  flags);
1614  }
1615  }
1616 
1617  switch (st->codec->codec_id) {
1618  case AV_CODEC_ID_PCM_S8:
1619  case AV_CODEC_ID_PCM_U8:
1620  if (st->codec->bits_per_coded_sample == 16)
1621  st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1622  break;
1623  case AV_CODEC_ID_PCM_S16LE:
1624  case AV_CODEC_ID_PCM_S16BE:
1625  if (st->codec->bits_per_coded_sample == 8)
1626  st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1627  else if (st->codec->bits_per_coded_sample == 24)
1628  st->codec->codec_id =
1629  st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1630  AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1631  else if (st->codec->bits_per_coded_sample == 32)
1632  st->codec->codec_id =
1633  st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1634  AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
1635  break;
1636  /* set values for old format before stsd version 1 appeared */
1637  case AV_CODEC_ID_MACE3:
1638  sc->samples_per_frame = 6;
1639  sc->bytes_per_frame = 2 * st->codec->channels;
1640  break;
1641  case AV_CODEC_ID_MACE6:
1642  sc->samples_per_frame = 6;
1643  sc->bytes_per_frame = 1 * st->codec->channels;
1644  break;
1645  case AV_CODEC_ID_ADPCM_IMA_QT:
1646  sc->samples_per_frame = 64;
1647  sc->bytes_per_frame = 34 * st->codec->channels;
1648  break;
1649  case AV_CODEC_ID_GSM:
1650  sc->samples_per_frame = 160;
1651  sc->bytes_per_frame = 33;
1652  break;
1653  default:
1654  break;
1655  }
1656 
1657  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1658  if (bits_per_sample) {
1659  st->codec->bits_per_coded_sample = bits_per_sample;
1660  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1661  }
1662 }
1663 
1664 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
1665  AVStream *st, MOVStreamContext *sc,
1666  int64_t size)
1667 {
1668  // ttxt stsd contains display flags, justification, background
1669  // color, fonts, and default styles, so fake an atom to read it
1670  MOVAtom fake_atom = { .size = size };
1671  // mp4s contains a regular esds atom
1672  if (st->codec->codec_tag != AV_RL32("mp4s"))
1673  mov_read_glbl(c, pb, fake_atom);
1674  st->codec->width = sc->width;
1675  st->codec->height = sc->height;
1676 }
1677 
1678 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1679 {
1680  uint8_t r, g, b;
1681  int y, cb, cr;
1682 
1683  y = (ycbcr >> 16) & 0xFF;
1684  cr = (ycbcr >> 8) & 0xFF;
1685  cb = ycbcr & 0xFF;
1686 
1687  b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
1688  g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
1689  r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
1690 
1691  return (r << 16) | (g << 8) | b;
1692 }
1693 
1694 static int mov_rewrite_dvd_sub_extradata(AVStream *st)
1695 {
1696  char buf[256] = {0};
1697  uint8_t *src = st->codec->extradata;
1698  int i;
1699 
1700  if (st->codec->extradata_size != 64)
1701  return 0;
1702 
1703  if (st->codec->width > 0 && st->codec->height > 0)
1704  snprintf(buf, sizeof(buf), "size: %dx%d\n",
1705  st->codec->width, st->codec->height);
1706  av_strlcat(buf, "palette: ", sizeof(buf));
1707 
1708  for (i = 0; i < 16; i++) {
1709  uint32_t yuv = AV_RB32(src + i * 4);
1710  uint32_t rgba = yuv_to_rgba(yuv);
1711 
1712  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1713  }
1714 
1715  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1716  return 0;
1717 
1718  av_freep(&st->codec->extradata);
1719  st->codec->extradata_size = 0;
1720  st->codec->extradata = av_mallocz(strlen(buf) + FF_INPUT_BUFFER_PADDING_SIZE);
1721  if (!st->codec->extradata)
1722  return AVERROR(ENOMEM);
1723  st->codec->extradata_size = strlen(buf);
1724  memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1725 
1726  return 0;
1727 }
1728 
1729 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
1730  AVStream *st, MOVStreamContext *sc,
1731  int64_t size)
1732 {
1733  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1734  if ((int)size != size || ff_get_extradata(st->codec, pb, size) < 0)
1735  return AVERROR(ENOMEM);
1736  if (size > 16) {
1737  MOVStreamContext *tmcd_ctx = st->priv_data;
1738  int val;
1739  val = AV_RB32(st->codec->extradata + 4);
1740  tmcd_ctx->tmcd_flags = val;
1741  if (val & 1)
1742  st->codec->flags2 |= CODEC_FLAG2_DROP_FRAME_TIMECODE;
1743  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1744  st->codec->time_base.num = 1;
1745  /* adjust for per frame dur in counter mode */
1746  if (tmcd_ctx->tmcd_flags & 0x0008) {
1747  int timescale = AV_RB32(st->codec->extradata + 8);
1748  int framedur = AV_RB32(st->codec->extradata + 12);
1749  st->codec->time_base.den *= timescale;
1750  st->codec->time_base.num *= framedur;
1751  }
1752  if (size > 30) {
1753  uint32_t len = AV_RB32(st->codec->extradata + 18); /* name atom length */
1754  uint32_t format = AV_RB32(st->codec->extradata + 22);
1755  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
1756  uint16_t str_size = AV_RB16(st->codec->extradata + 26); /* string length */
1757  if (str_size > 0 && size >= (int)str_size + 26) {
1758  char *reel_name = av_malloc(str_size + 1);
1759  if (!reel_name)
1760  return AVERROR(ENOMEM);
1761  memcpy(reel_name, st->codec->extradata + 30, str_size);
1762  reel_name[str_size] = 0; /* Add null terminator */
1763  /* don't add reel_name if emtpy string */
1764  if (*reel_name == 0) {
1765  av_free(reel_name);
1766  } else {
1767  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
1768  }
1769  }
1770  }
1771  }
1772  }
1773  } else {
1774  /* other codec type, just skip (rtp, mp4s ...) */
1775  avio_skip(pb, size);
1776  }
1777  return 0;
1778 }
1779 
1780 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
1781  AVStream *st, MOVStreamContext *sc)
1782 {
1783  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1784  !st->codec->sample_rate && sc->time_scale > 1)
1785  st->codec->sample_rate = sc->time_scale;
1786 
1787  /* special codec parameters handling */
1788  switch (st->codec->codec_id) {
1789 #if CONFIG_DV_DEMUXER
1790  case AV_CODEC_ID_DVAUDIO:
1791  c->dv_fctx = avformat_alloc_context();
1792  c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1793  if (!c->dv_demux) {
1794  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1795  return AVERROR(ENOMEM);
1796  }
1797  sc->dv_audio_container = 1;
1798  st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1799  break;
1800 #endif
1801  /* no ifdef since parameters are always those */
1802  case AV_CODEC_ID_QCELP:
1803  st->codec->channels = 1;
1804  // force sample rate for qcelp when not stored in mov
1805  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1806  st->codec->sample_rate = 8000;
1807  // FIXME: Why is the following needed for some files?
1808  sc->samples_per_frame = 160;
1809  if (!sc->bytes_per_frame)
1810  sc->bytes_per_frame = 35;
1811  break;
1812  case AV_CODEC_ID_AMR_NB:
1813  st->codec->channels = 1;
1814  /* force sample rate for amr, stsd in 3gp does not store sample rate */
1815  st->codec->sample_rate = 8000;
1816  break;
1817  case AV_CODEC_ID_AMR_WB:
1818  st->codec->channels = 1;
1819  st->codec->sample_rate = 16000;
1820  break;
1821  case AV_CODEC_ID_MP2:
1822  case AV_CODEC_ID_MP3:
1823  /* force type after stsd for m1a hdlr */
1824  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1825  st->need_parsing = AVSTREAM_PARSE_FULL;
1826  break;
1827  case AV_CODEC_ID_GSM:
1828  case AV_CODEC_ID_ADPCM_MS:
1829  case AV_CODEC_ID_ADPCM_IMA_WAV:
1830  case AV_CODEC_ID_ILBC:
1831  case AV_CODEC_ID_MACE3:
1832  case AV_CODEC_ID_MACE6:
1833  case AV_CODEC_ID_QDM2:
1834  st->codec->block_align = sc->bytes_per_frame;
1835  break;
1836  case AV_CODEC_ID_ALAC:
1837  if (st->codec->extradata_size == 36) {
1838  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1839  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1840  }
1841  break;
1842  case AV_CODEC_ID_AC3:
1843  case AV_CODEC_ID_EAC3:
1844  case AV_CODEC_ID_MPEG1VIDEO:
1845  case AV_CODEC_ID_VC1:
1846  st->need_parsing = AVSTREAM_PARSE_FULL;
1847  break;
1848  default:
1849  break;
1850  }
1851  return 0;
1852 }
1853 
1854 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
1855  int codec_tag, int format,
1856  int64_t size)
1857 {
1858  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1859 
1860  if (codec_tag &&
1861  (codec_tag != format &&
1862  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1863  : codec_tag != MKTAG('j','p','e','g')))) {
1864  /* Multiple fourcc, we skip JPEG. This is not correct, we should
1865  * export it as a separate AVStream but this needs a few changes
1866  * in the MOV demuxer, patch welcome. */
1867 
1868  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1869  avio_skip(pb, size);
1870  return 1;
1871  }
1872  if ( codec_tag == AV_RL32("avc1") ||
1873  codec_tag == AV_RL32("hvc1") ||
1874  codec_tag == AV_RL32("hev1")
1875  )
1876  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
1877 
1878  return 0;
1879 }
1880 
1881 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1882 {
1883  AVStream *st;
1884  MOVStreamContext *sc;
1885  int pseudo_stream_id;
1886 
1887  if (c->fc->nb_streams < 1)
1888  return 0;
1889  st = c->fc->streams[c->fc->nb_streams-1];
1890  sc = st->priv_data;
1891 
1892  for (pseudo_stream_id = 0;
1893  pseudo_stream_id < entries && !pb->eof_reached;
1894  pseudo_stream_id++) {
1895  //Parsing Sample description table
1896  enum AVCodecID id;
1897  int ret, dref_id = 1;
1898  MOVAtom a = { AV_RL32("stsd") };
1899  int64_t start_pos = avio_tell(pb);
1900  int64_t size = avio_rb32(pb); /* size */
1901  uint32_t format = avio_rl32(pb); /* data format */
1902 
1903  if (size >= 16) {
1904  avio_rb32(pb); /* reserved */
1905  avio_rb16(pb); /* reserved */
1906  dref_id = avio_rb16(pb);
1907  }else if (size <= 7){
1908  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1909  return AVERROR_INVALIDDATA;
1910  }
1911 
1912  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1913  size - (avio_tell(pb) - start_pos)))
1914  continue;
1915 
1916  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1917  sc->dref_id= dref_id;
1918 
1919  id = mov_codec_id(st, format);
1920 
1921  av_dlog(c->fc, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1922  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1923  (format >> 24) & 0xff, st->codec->codec_type);
1924 
1925  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1926  st->codec->codec_id = id;
1927  mov_parse_stsd_video(c, pb, st, sc);
1928  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1929  st->codec->codec_id = id;
1930  mov_parse_stsd_audio(c, pb, st, sc);
1931  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1932  st->codec->codec_id = id;
1933  mov_parse_stsd_subtitle(c, pb, st, sc,
1934  size - (avio_tell(pb) - start_pos));
1935  } else {
1936  ret = mov_parse_stsd_data(c, pb, st, sc,
1937  size - (avio_tell(pb) - start_pos));
1938  if (ret < 0)
1939  return ret;
1940  }
1941  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1942  a.size = size - (avio_tell(pb) - start_pos);
1943  if (a.size > 8) {
1944  if ((ret = mov_read_default(c, pb, a)) < 0)
1945  return ret;
1946  } else if (a.size > 0)
1947  avio_skip(pb, a.size);
1948  }
1949 
1950  if (pb->eof_reached)
1951  return AVERROR_EOF;
1952 
1953  return mov_finalize_stsd_codec(c, pb, st, sc);
1954 }
1955 
1956 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1957 {
1958  int entries;
1959 
1960  avio_r8(pb); /* version */
1961  avio_rb24(pb); /* flags */
1962  entries = avio_rb32(pb);
1963 
1964  return ff_mov_read_stsd_entries(c, pb, entries);
1965 }
1966 
1967 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1968 {
1969  AVStream *st;
1970  MOVStreamContext *sc;
1971  unsigned int i, entries;
1972 
1973  if (c->fc->nb_streams < 1)
1974  return 0;
1975  st = c->fc->streams[c->fc->nb_streams-1];
1976  sc = st->priv_data;
1977 
1978  avio_r8(pb); /* version */
1979  avio_rb24(pb); /* flags */
1980 
1981  entries = avio_rb32(pb);
1982 
1983  av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1984 
1985  if (!entries)
1986  return 0;
1987  if (sc->stsc_data)
1988  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
1989  av_free(sc->stsc_data);
1990  sc->stsc_count = 0;
1991  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
1992  if (!sc->stsc_data)
1993  return AVERROR(ENOMEM);
1994 
1995  for (i = 0; i < entries && !pb->eof_reached; i++) {
1996  sc->stsc_data[i].first = avio_rb32(pb);
1997  sc->stsc_data[i].count = avio_rb32(pb);
1998  sc->stsc_data[i].id = avio_rb32(pb);
1999  }
2000 
2001  sc->stsc_count = i;
2002 
2003  if (pb->eof_reached)
2004  return AVERROR_EOF;
2005 
2006  return 0;
2007 }
2008 
2009 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2010 {
2011  AVStream *st;
2012  MOVStreamContext *sc;
2013  unsigned i, entries;
2014 
2015  if (c->fc->nb_streams < 1)
2016  return 0;
2017  st = c->fc->streams[c->fc->nb_streams-1];
2018  sc = st->priv_data;
2019 
2020  avio_rb32(pb); // version + flags
2021 
2022  entries = avio_rb32(pb);
2023  if (sc->stps_data)
2024  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2025  av_free(sc->stps_data);
2026  sc->stps_count = 0;
2027  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2028  if (!sc->stps_data)
2029  return AVERROR(ENOMEM);
2030 
2031  for (i = 0; i < entries && !pb->eof_reached; i++) {
2032  sc->stps_data[i] = avio_rb32(pb);
2033  //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
2034  }
2035 
2036  sc->stps_count = i;
2037 
2038  if (pb->eof_reached)
2039  return AVERROR_EOF;
2040 
2041  return 0;
2042 }
2043 
2044 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2045 {
2046  AVStream *st;
2047  MOVStreamContext *sc;
2048  unsigned int i, entries;
2049 
2050  if (c->fc->nb_streams < 1)
2051  return 0;
2052  st = c->fc->streams[c->fc->nb_streams-1];
2053  sc = st->priv_data;
2054 
2055  avio_r8(pb); /* version */
2056  avio_rb24(pb); /* flags */
2057 
2058  entries = avio_rb32(pb);
2059 
2060  av_dlog(c->fc, "keyframe_count = %d\n", entries);
2061 
2062  if (!entries)
2063  {
2064  sc->keyframe_absent = 1;
2065  if (!st->need_parsing && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2066  st->need_parsing = AVSTREAM_PARSE_HEADERS;
2067  return 0;
2068  }
2069  if (sc->keyframes)
2070  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2071  if (entries >= UINT_MAX / sizeof(int))
2072  return AVERROR_INVALIDDATA;
2073  av_freep(&sc->keyframes);
2074  sc->keyframe_count = 0;
2075  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2076  if (!sc->keyframes)
2077  return AVERROR(ENOMEM);
2078 
2079  for (i = 0; i < entries && !pb->eof_reached; i++) {
2080  sc->keyframes[i] = avio_rb32(pb);
2081  //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
2082  }
2083 
2084  sc->keyframe_count = i;
2085 
2086  if (pb->eof_reached)
2087  return AVERROR_EOF;
2088 
2089  return 0;
2090 }
2091 
2092 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2093 {
2094  AVStream *st;
2095  MOVStreamContext *sc;
2096  unsigned int i, entries, sample_size, field_size, num_bytes;
2097  GetBitContext gb;
2098  unsigned char* buf;
2099 
2100  if (c->fc->nb_streams < 1)
2101  return 0;
2102  st = c->fc->streams[c->fc->nb_streams-1];
2103  sc = st->priv_data;
2104 
2105  avio_r8(pb); /* version */
2106  avio_rb24(pb); /* flags */
2107 
2108  if (atom.type == MKTAG('s','t','s','z')) {
2109  sample_size = avio_rb32(pb);
2110  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2111  sc->sample_size = sample_size;
2112  sc->stsz_sample_size = sample_size;
2113  field_size = 32;
2114  } else {
2115  sample_size = 0;
2116  avio_rb24(pb); /* reserved */
2117  field_size = avio_r8(pb);
2118  }
2119  entries = avio_rb32(pb);
2120 
2121  av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2122 
2123  sc->sample_count = entries;
2124  if (sample_size)
2125  return 0;
2126 
2127  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2128  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2129  return AVERROR_INVALIDDATA;
2130  }
2131 
2132  if (!entries)
2133  return 0;
2134  if (entries >= (UINT_MAX - 4) / field_size)
2135  return AVERROR_INVALIDDATA;
2136  if (sc->sample_sizes)
2137  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2138  av_free(sc->sample_sizes);
2139  sc->sample_count = 0;
2140  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2141  if (!sc->sample_sizes)
2142  return AVERROR(ENOMEM);
2143 
2144  num_bytes = (entries*field_size+4)>>3;
2145 
2146  buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
2147  if (!buf) {
2148  av_freep(&sc->sample_sizes);
2149  return AVERROR(ENOMEM);
2150  }
2151 
2152  if (avio_read(pb, buf, num_bytes) < num_bytes) {
2153  av_freep(&sc->sample_sizes);
2154  av_free(buf);
2155  return AVERROR_INVALIDDATA;
2156  }
2157 
2158  init_get_bits(&gb, buf, 8*num_bytes);
2159 
2160  for (i = 0; i < entries && !pb->eof_reached; i++) {
2161  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2162  sc->data_size += sc->sample_sizes[i];
2163  }
2164 
2165  sc->sample_count = i;
2166 
2167  if (pb->eof_reached)
2168  return AVERROR_EOF;
2169 
2170  av_free(buf);
2171  return 0;
2172 }
2173 
2174 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2175 {
2176  AVStream *st;
2177  MOVStreamContext *sc;
2178  unsigned int i, entries;
2179  int64_t duration=0;
2180  int64_t total_sample_count=0;
2181 
2182  if (c->fc->nb_streams < 1)
2183  return 0;
2184  st = c->fc->streams[c->fc->nb_streams-1];
2185  sc = st->priv_data;
2186 
2187  avio_r8(pb); /* version */
2188  avio_rb24(pb); /* flags */
2189  entries = avio_rb32(pb);
2190 
2191  av_dlog(c->fc, "track[%i].stts.entries = %i\n",
2192  c->fc->nb_streams-1, entries);
2193 
2194  if (sc->stts_data)
2195  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2196  av_free(sc->stts_data);
2197  sc->stts_count = 0;
2198  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2199  if (!sc->stts_data)
2200  return AVERROR(ENOMEM);
2201 
2202  for (i = 0; i < entries && !pb->eof_reached; i++) {
2203  int sample_duration;
2204  int sample_count;
2205 
2206  sample_count=avio_rb32(pb);
2207  sample_duration = avio_rb32(pb);
2208 
2209  /* sample_duration < 0 is invalid based on the spec */
2210  if (sample_duration < 0) {
2211  av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta %d in STTS, at %d st:%d\n",
2212  sample_duration, i, c->fc->nb_streams-1);
2213  sample_duration = 1;
2214  }
2215  if (sample_count < 0) {
2216  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2217  return AVERROR_INVALIDDATA;
2218  }
2219  sc->stts_data[i].count= sample_count;
2220  sc->stts_data[i].duration= sample_duration;
2221 
2222  av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
2223  sample_count, sample_duration);
2224 
2225  if ( i+1 == entries
2226  && i
2227  && sample_count == 1
2228  && total_sample_count > 100
2229  && sample_duration/10 > duration / total_sample_count)
2230  sample_duration = duration / total_sample_count;
2231  duration+=(int64_t)sample_duration*sample_count;
2232  total_sample_count+=sample_count;
2233  }
2234 
2235  sc->stts_count = i;
2236 
2237  sc->duration_for_fps += duration;
2238  sc->nb_frames_for_fps += total_sample_count;
2239 
2240  if (pb->eof_reached)
2241  return AVERROR_EOF;
2242 
2243  st->nb_frames= total_sample_count;
2244  if (duration)
2245  st->duration= duration;
2246  sc->track_end = duration;
2247  return 0;
2248 }
2249 
2250 static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
2251 {
2252  if (duration < 0) {
2253  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2254  }
2255 }
2256 
2257 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2258 {
2259  AVStream *st;
2260  MOVStreamContext *sc;
2261  unsigned int i, entries;
2262 
2263  if (c->fc->nb_streams < 1)
2264  return 0;
2265  st = c->fc->streams[c->fc->nb_streams-1];
2266  sc = st->priv_data;
2267 
2268  avio_r8(pb); /* version */
2269  avio_rb24(pb); /* flags */
2270  entries = avio_rb32(pb);
2271 
2272  av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2273 
2274  if (!entries)
2275  return 0;
2276  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2277  return AVERROR_INVALIDDATA;
2278  sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
2279  if (!sc->ctts_data)
2280  return AVERROR(ENOMEM);
2281 
2282  for (i = 0; i < entries && !pb->eof_reached; i++) {
2283  int count =avio_rb32(pb);
2284  int duration =avio_rb32(pb);
2285 
2286  sc->ctts_data[i].count = count;
2287  sc->ctts_data[i].duration= duration;
2288 
2289  av_dlog(c->fc, "count=%d, duration=%d\n",
2290  count, duration);
2291 
2292  if (FFABS(duration) > (1<<28) && i+2<entries) {
2293  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2294  av_freep(&sc->ctts_data);
2295  sc->ctts_count = 0;
2296  return 0;
2297  }
2298 
2299  if (i+2<entries)
2300  mov_update_dts_shift(sc, duration);
2301  }
2302 
2303  sc->ctts_count = i;
2304 
2305  if (pb->eof_reached)
2306  return AVERROR_EOF;
2307 
2308  av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
2309 
2310  return 0;
2311 }
2312 
2313 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2314 {
2315  AVStream *st;
2316  MOVStreamContext *sc;
2317  unsigned int i, entries;
2318  uint8_t version;
2319  uint32_t grouping_type;
2320 
2321  if (c->fc->nb_streams < 1)
2322  return 0;
2323  st = c->fc->streams[c->fc->nb_streams-1];
2324  sc = st->priv_data;
2325 
2326  version = avio_r8(pb); /* version */
2327  avio_rb24(pb); /* flags */
2328  grouping_type = avio_rl32(pb);
2329  if (grouping_type != MKTAG( 'r','a','p',' '))
2330  return 0; /* only support 'rap ' grouping */
2331  if (version == 1)
2332  avio_rb32(pb); /* grouping_type_parameter */
2333 
2334  entries = avio_rb32(pb);
2335  if (!entries)
2336  return 0;
2337  if (sc->rap_group)
2338  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2339  av_free(sc->rap_group);
2340  sc->rap_group_count = 0;
2341  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2342  if (!sc->rap_group)
2343  return AVERROR(ENOMEM);
2344 
2345  for (i = 0; i < entries && !pb->eof_reached; i++) {
2346  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2347  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2348  }
2349 
2350  sc->rap_group_count = i;
2351 
2352  return pb->eof_reached ? AVERROR_EOF : 0;
2353 }
2354 
2355 static void mov_build_index(MOVContext *mov, AVStream *st)
2356 {
2357  MOVStreamContext *sc = st->priv_data;
2358  int64_t current_offset;
2359  int64_t current_dts = 0;
2360  unsigned int stts_index = 0;
2361  unsigned int stsc_index = 0;
2362  unsigned int stss_index = 0;
2363  unsigned int stps_index = 0;
2364  unsigned int i, j;
2365  uint64_t stream_size = 0;
2366 
2367  if (sc->elst_count) {
2368  int i, edit_start_index = 0, unsupported = 0;
2369  int64_t empty_duration = 0; // empty duration of the first edit list entry
2370  int64_t start_time = 0; // start time of the media
2371 
2372  for (i = 0; i < sc->elst_count; i++) {
2373  const MOVElst *e = &sc->elst_data[i];
2374  if (i == 0 && e->time == -1) {
2375  /* if empty, the first entry is the start time of the stream
2376  * relative to the presentation itself */
2377  empty_duration = e->duration;
2378  edit_start_index = 1;
2379  } else if (i == edit_start_index && e->time >= 0) {
2380  start_time = e->time;
2381  } else
2382  unsupported = 1;
2383  }
2384  if (unsupported)
2385  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
2386  "a/v desync might occur, patch welcome\n");
2387 
2388  /* adjust first dts according to edit list */
2389  if ((empty_duration || start_time) && mov->time_scale > 0) {
2390  if (empty_duration)
2391  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
2392  sc->time_offset = start_time - empty_duration;
2393  current_dts = -sc->time_offset;
2394  if (sc->ctts_count>0 && sc->stts_count>0 &&
2395  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2396  /* more than 16 frames delay, dts are likely wrong
2397  this happens with files created by iMovie */
2398  sc->wrong_dts = 1;
2399  st->codec->has_b_frames = 1;
2400  }
2401  }
2402  }
2403 
2404  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2405  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2406  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2407  unsigned int current_sample = 0;
2408  unsigned int stts_sample = 0;
2409  unsigned int sample_size;
2410  unsigned int distance = 0;
2411  unsigned int rap_group_index = 0;
2412  unsigned int rap_group_sample = 0;
2413  int rap_group_present = sc->rap_group_count && sc->rap_group;
2414  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2415 
2416  current_dts -= sc->dts_shift;
2417 
2418  if (!sc->sample_count || st->nb_index_entries)
2419  return;
2420  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2421  return;
2422  if (av_reallocp_array(&st->index_entries,
2423  st->nb_index_entries + sc->sample_count,
2424  sizeof(*st->index_entries)) < 0) {
2425  st->nb_index_entries = 0;
2426  return;
2427  }
2428  st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
2429 
2430  for (i = 0; i < sc->chunk_count; i++) {
2431  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2432  current_offset = sc->chunk_offsets[i];
2433  while (stsc_index + 1 < sc->stsc_count &&
2434  i + 1 == sc->stsc_data[stsc_index + 1].first)
2435  stsc_index++;
2436 
2437  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2438  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2439  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2440  sc->stsz_sample_size = sc->sample_size;
2441  }
2442  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2443  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2444  sc->stsz_sample_size = sc->sample_size;
2445  }
2446 
2447  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2448  int keyframe = 0;
2449  if (current_sample >= sc->sample_count) {
2450  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2451  return;
2452  }
2453 
2454  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2455  keyframe = 1;
2456  if (stss_index + 1 < sc->keyframe_count)
2457  stss_index++;
2458  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2459  keyframe = 1;
2460  if (stps_index + 1 < sc->stps_count)
2461  stps_index++;
2462  }
2463  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2464  if (sc->rap_group[rap_group_index].index > 0)
2465  keyframe = 1;
2466  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2467  rap_group_sample = 0;
2468  rap_group_index++;
2469  }
2470  }
2471  if (sc->keyframe_absent
2472  && !sc->stps_count
2473  && !rap_group_present
2474  && (st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2475  keyframe = 1;
2476  if (keyframe)
2477  distance = 0;
2478  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2479  if (sc->pseudo_stream_id == -1 ||
2480  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2481  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2482  e->pos = current_offset;
2483  e->timestamp = current_dts;
2484  e->size = sample_size;
2485  e->min_distance = distance;
2486  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2487  av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2488  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2489  current_offset, current_dts, sample_size, distance, keyframe);
2490  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2491  ff_rfps_add_frame(mov->fc, st, current_dts);
2492  }
2493 
2494  current_offset += sample_size;
2495  stream_size += sample_size;
2496  current_dts += sc->stts_data[stts_index].duration;
2497  distance++;
2498  stts_sample++;
2499  current_sample++;
2500  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2501  stts_sample = 0;
2502  stts_index++;
2503  }
2504  }
2505  }
2506  if (st->duration > 0)
2507  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2508  } else {
2509  unsigned chunk_samples, total = 0;
2510 
2511  // compute total chunk count
2512  for (i = 0; i < sc->stsc_count; i++) {
2513  unsigned count, chunk_count;
2514 
2515  chunk_samples = sc->stsc_data[i].count;
2516  if (i != sc->stsc_count - 1 &&
2517  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2518  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2519  return;
2520  }
2521 
2522  if (sc->samples_per_frame >= 160) { // gsm
2523  count = chunk_samples / sc->samples_per_frame;
2524  } else if (sc->samples_per_frame > 1) {
2525  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2526  count = (chunk_samples+samples-1) / samples;
2527  } else {
2528  count = (chunk_samples+1023) / 1024;
2529  }
2530 
2531  if (i < sc->stsc_count - 1)
2532  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2533  else
2534  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2535  total += chunk_count * count;
2536  }
2537 
2538  av_dlog(mov->fc, "chunk count %d\n", total);
2539  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2540  return;
2541  if (av_reallocp_array(&st->index_entries,
2542  st->nb_index_entries + total,
2543  sizeof(*st->index_entries)) < 0) {
2544  st->nb_index_entries = 0;
2545  return;
2546  }
2547  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2548 
2549  // populate index
2550  for (i = 0; i < sc->chunk_count; i++) {
2551  current_offset = sc->chunk_offsets[i];
2552  if (stsc_index + 1 < sc->stsc_count &&
2553  i + 1 == sc->stsc_data[stsc_index + 1].first)
2554  stsc_index++;
2555  chunk_samples = sc->stsc_data[stsc_index].count;
2556 
2557  while (chunk_samples > 0) {
2558  AVIndexEntry *e;
2559  unsigned size, samples;
2560 
2561  if (sc->samples_per_frame >= 160) { // gsm
2562  samples = sc->samples_per_frame;
2563  size = sc->bytes_per_frame;
2564  } else {
2565  if (sc->samples_per_frame > 1) {
2566  samples = FFMIN((1024 / sc->samples_per_frame)*
2567  sc->samples_per_frame, chunk_samples);
2568  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2569  } else {
2570  samples = FFMIN(1024, chunk_samples);
2571  size = samples * sc->sample_size;
2572  }
2573  }
2574 
2575  if (st->nb_index_entries >= total) {
2576  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2577  return;
2578  }
2579  e = &st->index_entries[st->nb_index_entries++];
2580  e->pos = current_offset;
2581  e->timestamp = current_dts;
2582  e->size = size;
2583  e->min_distance = 0;
2584  e->flags = AVINDEX_KEYFRAME;
2585  av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2586  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2587  size, samples);
2588 
2589  current_offset += size;
2590  current_dts += samples;
2591  chunk_samples -= samples;
2592  }
2593  }
2594  }
2595 }
2596 
2597 static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
2598  AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
2599 {
2600  /* try relative path, we do not try the absolute because it can leak information about our
2601  system to an attacker */
2602  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2603  char filename[1024];
2604  const char *src_path;
2605  int i, l;
2606 
2607  /* find a source dir */
2608  src_path = strrchr(src, '/');
2609  if (src_path)
2610  src_path++;
2611  else
2612  src_path = src;
2613 
2614  /* find a next level down to target */
2615  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2616  if (ref->path[l] == '/') {
2617  if (i == ref->nlvl_to - 1)
2618  break;
2619  else
2620  i++;
2621  }
2622 
2623  /* compose filename if next level down to target was found */
2624  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2625  memcpy(filename, src, src_path - src);
2626  filename[src_path - src] = 0;
2627 
2628  for (i = 1; i < ref->nlvl_from; i++)
2629  av_strlcat(filename, "../", 1024);
2630 
2631  av_strlcat(filename, ref->path + l + 1, 1024);
2632 
2633  if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2634  return 0;
2635  }
2636  } else if (use_absolute_path) {
2637  av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
2638  "this is a possible security issue\n");
2639  if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2640  return 0;
2641  }
2642 
2643  return AVERROR(ENOENT);
2644 }
2645 
2646 static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
2647 {
2648  if (sc->time_scale <= 0) {
2649  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2650  sc->time_scale = c->time_scale;
2651  if (sc->time_scale <= 0)
2652  sc->time_scale = 1;
2653  }
2654 }
2655 
2656 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2657 {
2658  AVStream *st;
2659  MOVStreamContext *sc;
2660  int ret;
2661 
2662  st = avformat_new_stream(c->fc, NULL);
2663  if (!st) return AVERROR(ENOMEM);
2664  st->id = c->fc->nb_streams;
2665  sc = av_mallocz(sizeof(MOVStreamContext));
2666  if (!sc) return AVERROR(ENOMEM);
2667 
2668  st->priv_data = sc;
2669  st->codec->codec_type = AVMEDIA_TYPE_DATA;
2670  sc->ffindex = st->index;
2671 
2672  if ((ret = mov_read_default(c, pb, atom)) < 0)
2673  return ret;
2674 
2675  /* sanity checks */
2676  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2677  (!sc->sample_size && !sc->sample_count))) {
2678  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2679  st->index);
2680  return 0;
2681  }
2682 
2683  fix_timescale(c, sc);
2684 
2685  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2686 
2687  mov_build_index(c, st);
2688 
2689  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2690  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2691  if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
2692  c->use_absolute_path, c->fc) < 0)
2693  av_log(c->fc, AV_LOG_ERROR,
2694  "stream %d, error opening alias: path='%s', dir='%s', "
2695  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2696  st->index, dref->path, dref->dir, dref->filename,
2697  dref->volume, dref->nlvl_from, dref->nlvl_to);
2698  } else {
2699  sc->pb = c->fc->pb;
2700  sc->pb_is_copied = 1;
2701  }
2702 
2703  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2704  if (!st->sample_aspect_ratio.num && st->codec->width && st->codec->height &&
2705  sc->height && sc->width &&
2706  (st->codec->width != sc->width || st->codec->height != sc->height)) {
2707  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2708  ((double)st->codec->width * sc->height), INT_MAX);
2709  }
2710 
2711 #if FF_API_R_FRAME_RATE
2712  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2713  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
2714  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2715 #endif
2716  }
2717 
2718  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2719  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2720  TAG_IS_AVCI(st->codec->codec_tag)) {
2721  ret = ff_generate_avci_extradata(st);
2722  if (ret < 0)
2723  return ret;
2724  }
2725 
2726  switch (st->codec->codec_id) {
2727 #if CONFIG_H261_DECODER
2728  case AV_CODEC_ID_H261:
2729 #endif
2730 #if CONFIG_H263_DECODER
2731  case AV_CODEC_ID_H263:
2732 #endif
2733 #if CONFIG_MPEG4_DECODER
2734  case AV_CODEC_ID_MPEG4:
2735 #endif
2736  st->codec->width = 0; /* let decoder init width/height */
2737  st->codec->height= 0;
2738  break;
2739  }
2740 
2741  /* Do not need those anymore. */
2742  av_freep(&sc->chunk_offsets);
2743  av_freep(&sc->stsc_data);
2744  av_freep(&sc->sample_sizes);
2745  av_freep(&sc->keyframes);
2746  av_freep(&sc->stts_data);
2747  av_freep(&sc->stps_data);
2748  av_freep(&sc->elst_data);
2749  av_freep(&sc->rap_group);
2750 
2751  return 0;
2752 }
2753 
2754 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2755 {
2756  int ret;
2757  c->itunes_metadata = 1;
2758  ret = mov_read_default(c, pb, atom);
2759  c->itunes_metadata = 0;
2760  return ret;
2761 }
2762 
2763 static int mov_read_custom_2plus(MOVContext *c, AVIOContext *pb, int size)
2764 {
2765  int64_t end = avio_tell(pb) + size;
2766  uint8_t *key = NULL, *val = NULL;
2767  int i;
2768  AVStream *st;
2769  MOVStreamContext *sc;
2770 
2771  if (c->fc->nb_streams < 1)
2772  return 0;
2773  st = c->fc->streams[c->fc->nb_streams-1];
2774  sc = st->priv_data;
2775 
2776  for (i = 0; i < 2; i++) {
2777  uint8_t **p;
2778  uint32_t len, tag;
2779 
2780  if (end - avio_tell(pb) <= 12)
2781  break;
2782 
2783  len = avio_rb32(pb);
2784  tag = avio_rl32(pb);
2785  avio_skip(pb, 4); // flags
2786 
2787  if (len < 12 || len - 12 > end - avio_tell(pb))
2788  break;
2789  len -= 12;
2790 
2791  if (tag == MKTAG('n', 'a', 'm', 'e'))
2792  p = &key;
2793  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
2794  avio_skip(pb, 4);
2795  len -= 4;
2796  p = &val;
2797  } else
2798  break;
2799 
2800  *p = av_malloc(len + 1);
2801  if (!*p)
2802  break;
2803  avio_read(pb, *p, len);
2804  (*p)[len] = 0;
2805  }
2806 
2807  if (key && val) {
2808  if (strcmp(key, "iTunSMPB") == 0) {
2809  int priming, remainder, samples;
2810  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
2811  if(priming>0 && priming<16384)
2812  sc->start_pad = priming;
2813  }
2814  }
2815  if (strcmp(key, "cdec") != 0) {
2816  av_dict_set(&c->fc->metadata, key, val,
2817  AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
2818  key = val = NULL;
2819  }
2820  }
2821 
2822  avio_seek(pb, end, SEEK_SET);
2823  av_freep(&key);
2824  av_freep(&val);
2825  return 0;
2826 }
2827 
2828 static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2829 {
2830  int64_t end = avio_tell(pb) + atom.size;
2831  uint32_t tag, len;
2832 
2833  if (atom.size < 8)
2834  goto fail;
2835 
2836  len = avio_rb32(pb);
2837  tag = avio_rl32(pb);
2838 
2839  if (len > atom.size)
2840  goto fail;
2841 
2842  if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
2843  uint8_t domain[128];
2844  int domain_len;
2845 
2846  avio_skip(pb, 4); // flags
2847  len -= 12;
2848 
2849  domain_len = avio_get_str(pb, len, domain, sizeof(domain));
2850  avio_skip(pb, len - domain_len);
2851  return mov_read_custom_2plus(c, pb, end - avio_tell(pb));
2852  }
2853 
2854 fail:
2855  av_log(c->fc, AV_LOG_VERBOSE,
2856  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
2857  return 0;
2858 }
2859 
2860 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2861 {
2862  while (atom.size > 8) {
2863  uint32_t tag = avio_rl32(pb);
2864  atom.size -= 4;
2865  if (tag == MKTAG('h','d','l','r')) {
2866  avio_seek(pb, -8, SEEK_CUR);
2867  atom.size += 8;
2868  return mov_read_default(c, pb, atom);
2869  }
2870  }
2871  return 0;
2872 }
2873 
2874 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2875 {
2876  int i;
2877  int width;
2878  int height;
2879  int display_matrix[3][3];
2880  AVStream *st;
2881  MOVStreamContext *sc;
2882  int version;
2883  int flags;
2884 
2885  if (c->fc->nb_streams < 1)
2886  return 0;
2887  st = c->fc->streams[c->fc->nb_streams-1];
2888  sc = st->priv_data;
2889 
2890  version = avio_r8(pb);
2891  flags = avio_rb24(pb);
2892  st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
2893 
2894  if (version == 1) {
2895  avio_rb64(pb);
2896  avio_rb64(pb);
2897  } else {
2898  avio_rb32(pb); /* creation time */
2899  avio_rb32(pb); /* modification time */
2900  }
2901  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2902  avio_rb32(pb); /* reserved */
2903 
2904  /* highlevel (considering edits) duration in movie timebase */
2905  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2906  avio_rb32(pb); /* reserved */
2907  avio_rb32(pb); /* reserved */
2908 
2909  avio_rb16(pb); /* layer */
2910  avio_rb16(pb); /* alternate group */
2911  avio_rb16(pb); /* volume */
2912  avio_rb16(pb); /* reserved */
2913 
2914  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2915  // they're kept in fixed point format through all calculations
2916  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
2917  // side data, but the scale factor is not needed to calculate aspect ratio
2918  for (i = 0; i < 3; i++) {
2919  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2920  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2921  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
2922  }
2923 
2924  width = avio_rb32(pb); // 16.16 fixed point track width
2925  height = avio_rb32(pb); // 16.16 fixed point track height
2926  sc->width = width >> 16;
2927  sc->height = height >> 16;
2928 
2929  // save the matrix and add rotate metadata when it is not the default
2930  // identity
2931  if (display_matrix[0][0] != (1 << 16) ||
2932  display_matrix[1][1] != (1 << 16) ||
2933  display_matrix[2][2] != (1 << 30) ||
2934  display_matrix[0][1] || display_matrix[0][2] ||
2935  display_matrix[1][0] || display_matrix[1][2] ||
2936  display_matrix[2][0] || display_matrix[2][1]) {
2937  int i, j;
2938  double rotate;
2939 
2940  av_freep(&sc->display_matrix);
2941  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
2942  if (!sc->display_matrix)
2943  return AVERROR(ENOMEM);
2944 
2945  for (i = 0; i < 3; i++)
2946  for (j = 0; j < 3; j++)
2947  sc->display_matrix[i * 3 + j] = display_matrix[j][i];
2948 
2949  rotate = av_display_rotation_get(sc->display_matrix);
2950  if (!isnan(rotate)) {
2951  char rotate_buf[64];
2952  rotate = -rotate;
2953  if (rotate < 0) // for backward compatibility
2954  rotate += 360;
2955  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
2956  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
2957  }
2958  }
2959 
2960  // transform the display width/height according to the matrix
2961  // to keep the same scale, use [width height 1<<16]
2962  if (width && height && sc->display_matrix) {
2963  double disp_transform[2];
2964 
2965 #define SQR(a) ((a)*(double)(a))
2966  for (i = 0; i < 2; i++)
2967  disp_transform[i] = sqrt(SQR(display_matrix[i][0]) + SQR(display_matrix[i][1]));
2968 
2969  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
2970  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
2971  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
2972  st->sample_aspect_ratio = av_d2q(
2973  disp_transform[0] / disp_transform[1],
2974  INT_MAX);
2975  }
2976  return 0;
2977 }
2978 
2979 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2980 {
2981  MOVFragment *frag = &c->fragment;
2982  MOVTrackExt *trex = NULL;
2983  MOVFragmentIndex* index = NULL;
2984  int flags, track_id, i;
2985 
2986  avio_r8(pb); /* version */
2987  flags = avio_rb24(pb);
2988 
2989  track_id = avio_rb32(pb);
2990  if (!track_id)
2991  return AVERROR_INVALIDDATA;
2992  frag->track_id = track_id;
2993  for (i = 0; i < c->trex_count; i++)
2994  if (c->trex_data[i].track_id == frag->track_id) {
2995  trex = &c->trex_data[i];
2996  break;
2997  }
2998  if (!trex) {
2999  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
3000  return AVERROR_INVALIDDATA;
3001  }
3002  for (i = 0; i < c->fragment_index_count; i++) {
3003  MOVFragmentIndex* candidate = c->fragment_index_data[i];
3004  if (candidate->track_id == frag->track_id) {
3005  av_log(c->fc, AV_LOG_DEBUG,
3006  "found fragment index for track %u\n", frag->track_id);
3007  index = candidate;
3008  break;
3009  }
3010  }
3011 
3012  frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
3013  avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
3014  frag->moof_offset : frag->implicit_offset;
3015  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
3016 
3017  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
3018  avio_rb32(pb) : trex->duration;
3019  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
3020  avio_rb32(pb) : trex->size;
3021  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
3022  avio_rb32(pb) : trex->flags;
3023  frag->time = AV_NOPTS_VALUE;
3024  if (index) {
3025  int i, found = 0;
3026  for (i = index->current_item; i < index->item_count; i++) {
3027  if (frag->implicit_offset == index->items[i].moof_offset) {
3028  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
3029  "for track %u and moof_offset %"PRId64"\n",
3030  frag->track_id, index->items[i].moof_offset);
3031  frag->time = index->items[i].time;
3032  index->current_item = i + 1;
3033  found = 1;
3034  }
3035  }
3036  if (!found) {
3037  av_log(c->fc, AV_LOG_WARNING, "track %u has a fragment index "
3038  "but it doesn't have an (in-order) entry for moof_offset "
3039  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
3040  }
3041  }
3042  av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
3043  return 0;
3044 }
3045 
3046 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3047 {
3048  c->chapter_track = avio_rb32(pb);
3049  return 0;
3050 }
3051 
3052 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3053 {
3054  MOVTrackExt *trex;
3055  int err;
3056 
3057  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
3058  return AVERROR_INVALIDDATA;
3059  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
3060  sizeof(*c->trex_data))) < 0) {
3061  c->trex_count = 0;
3062  return err;
3063  }
3064 
3065  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
3066 
3067  trex = &c->trex_data[c->trex_count++];
3068  avio_r8(pb); /* version */
3069  avio_rb24(pb); /* flags */
3070  trex->track_id = avio_rb32(pb);
3071  trex->stsd_id = avio_rb32(pb);
3072  trex->duration = avio_rb32(pb);
3073  trex->size = avio_rb32(pb);
3074  trex->flags = avio_rb32(pb);
3075  return 0;
3076 }
3077 
3078 static int mov_read_tfdt(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3079 {
3080  MOVFragment *frag = &c->fragment;
3081  AVStream *st = NULL;
3082  MOVStreamContext *sc;
3083  int version, i;
3084 
3085  for (i = 0; i < c->fc->nb_streams; i++) {
3086  if (c->fc->streams[i]->id == frag->track_id) {
3087  st = c->fc->streams[i];
3088  break;
3089  }
3090  }
3091  if (!st) {
3092  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3093  return AVERROR_INVALIDDATA;
3094  }
3095  sc = st->priv_data;
3096  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
3097  return 0;
3098  version = avio_r8(pb);
3099  avio_rb24(pb); /* flags */
3100  if (version) {
3101  sc->track_end = avio_rb64(pb);
3102  } else {
3103  sc->track_end = avio_rb32(pb);
3104  }
3105  return 0;
3106 }
3107 
3108 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3109 {
3110  MOVFragment *frag = &c->fragment;
3111  AVStream *st = NULL;
3112  MOVStreamContext *sc;
3113  MOVStts *ctts_data;
3114  uint64_t offset;
3115  int64_t dts;
3116  int data_offset = 0;
3117  unsigned entries, first_sample_flags = frag->flags;
3118  int flags, distance, i, found_keyframe = 0, err;
3119 
3120  for (i = 0; i < c->fc->nb_streams; i++) {
3121  if (c->fc->streams[i]->id == frag->track_id) {
3122  st = c->fc->streams[i];
3123  break;
3124  }
3125  }
3126  if (!st) {
3127  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3128  return AVERROR_INVALIDDATA;
3129  }
3130  sc = st->priv_data;
3131  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
3132  return 0;
3133  avio_r8(pb); /* version */
3134  flags = avio_rb24(pb);
3135  entries = avio_rb32(pb);
3136  av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
3137 
3138  /* Always assume the presence of composition time offsets.
3139  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
3140  * 1) in the initial movie, there are no samples.
3141  * 2) in the first movie fragment, there is only one sample without composition time offset.
3142  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
3143  if (!sc->ctts_count && sc->sample_count)
3144  {
3145  /* Complement ctts table if moov atom doesn't have ctts atom. */
3146  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
3147  if (!ctts_data)
3148  return AVERROR(ENOMEM);
3149  sc->ctts_data = ctts_data;
3150  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
3151  sc->ctts_data[sc->ctts_count].duration = 0;
3152  sc->ctts_count++;
3153  }
3154  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
3155  return AVERROR_INVALIDDATA;
3156  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
3157  sizeof(*sc->ctts_data))) < 0) {
3158  sc->ctts_count = 0;
3159  return err;
3160  }
3161  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
3162  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
3163  dts = sc->track_end - sc->time_offset;
3164  offset = frag->base_data_offset + data_offset;
3165  distance = 0;
3166  av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
3167  for (i = 0; i < entries && !pb->eof_reached; i++) {
3168  unsigned sample_size = frag->size;
3169  int sample_flags = i ? frag->flags : first_sample_flags;
3170  unsigned sample_duration = frag->duration;
3171  int keyframe = 0;
3172 
3173  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
3174  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
3175  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
3176  sc->ctts_data[sc->ctts_count].count = 1;
3177  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
3178  avio_rb32(pb) : 0;
3179  mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
3180  if (frag->time != AV_NOPTS_VALUE) {
3181  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
3182  int64_t pts = frag->time;
3183  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3184  " sc->dts_shift %d ctts.duration %d"
3185  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
3186  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
3187  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
3188  dts = pts - sc->dts_shift;
3189  if (flags & MOV_TRUN_SAMPLE_CTS) {
3190  dts -= sc->ctts_data[sc->ctts_count].duration;
3191  } else {
3192  dts -= sc->time_offset;
3193  }
3194  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
3195  } else {
3196  dts = frag->time;
3197  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3198  ", using it for dts\n", dts);
3199  }
3200  frag->time = AV_NOPTS_VALUE;
3201  }
3202  sc->ctts_count++;
3203  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3204  keyframe = 1;
3205  else if (!found_keyframe)
3206  keyframe = found_keyframe =
3207  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
3208  MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
3209  if (keyframe)
3210  distance = 0;
3211  err = av_add_index_entry(st, offset, dts, sample_size, distance,
3212  keyframe ? AVINDEX_KEYFRAME : 0);
3213  if (err < 0) {
3214  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
3215  }
3216  av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3217  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
3218  offset, dts, sample_size, distance, keyframe);
3219  distance++;
3220  dts += sample_duration;
3221  offset += sample_size;
3222  sc->data_size += sample_size;
3223  sc->duration_for_fps += sample_duration;
3224  sc->nb_frames_for_fps ++;
3225  }
3226 
3227  if (pb->eof_reached)
3228  return AVERROR_EOF;
3229 
3230  frag->implicit_offset = offset;
3231  st->duration = sc->track_end = dts + sc->time_offset;
3232  return 0;
3233 }
3234 
3235 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
3236 /* like the files created with Adobe Premiere 5.0, for samples see */
3237 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
3238 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3239 {
3240  int err;
3241 
3242  if (atom.size < 8)
3243  return 0; /* continue */
3244  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
3245  avio_skip(pb, atom.size - 4);
3246  return 0;
3247  }
3248  atom.type = avio_rl32(pb);
3249  atom.size -= 8;
3250  if (atom.type != MKTAG('m','d','a','t')) {
3251  avio_skip(pb, atom.size);
3252  return 0;
3253  }
3254  err = mov_read_mdat(c, pb, atom);
3255  return err;
3256 }
3257 
3258 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3259 {
3260 #if CONFIG_ZLIB
3261  AVIOContext ctx;
3262  uint8_t *cmov_data;
3263  uint8_t *moov_data; /* uncompressed data */
3264  long cmov_len, moov_len;
3265  int ret = -1;
3266 
3267  avio_rb32(pb); /* dcom atom */
3268  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
3269  return AVERROR_INVALIDDATA;
3270  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
3271  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
3272  return AVERROR_INVALIDDATA;
3273  }
3274  avio_rb32(pb); /* cmvd atom */
3275  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
3276  return AVERROR_INVALIDDATA;
3277  moov_len = avio_rb32(pb); /* uncompressed size */
3278  cmov_len = atom.size - 6 * 4;
3279 
3280  cmov_data = av_malloc(cmov_len);
3281  if (!cmov_data)
3282  return AVERROR(ENOMEM);
3283  moov_data = av_malloc(moov_len);
3284  if (!moov_data) {
3285  av_free(cmov_data);
3286  return AVERROR(ENOMEM);
3287  }
3288  avio_read(pb, cmov_data, cmov_len);
3289  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
3290  goto free_and_return;
3291  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
3292  goto free_and_return;
3293  atom.type = MKTAG('m','o','o','v');
3294  atom.size = moov_len;
3295  ret = mov_read_default(c, &ctx, atom);
3296 free_and_return:
3297  av_free(moov_data);
3298  av_free(cmov_data);
3299  return ret;
3300 #else
3301  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
3302  return AVERROR(ENOSYS);
3303 #endif
3304 }
3305 
3306 /* edit list atom */
3307 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3308 {
3309  MOVStreamContext *sc;
3310  int i, edit_count, version;
3311 
3312  if (c->fc->nb_streams < 1 || c->ignore_editlist)
3313  return 0;
3314  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
3315 
3316  version = avio_r8(pb); /* version */
3317  avio_rb24(pb); /* flags */
3318  edit_count = avio_rb32(pb); /* entries */
3319 
3320  if (!edit_count)
3321  return 0;
3322  if (sc->elst_data)
3323  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
3324  av_free(sc->elst_data);
3325  sc->elst_count = 0;
3326  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
3327  if (!sc->elst_data)
3328  return AVERROR(ENOMEM);
3329 
3330  av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3331  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
3332  MOVElst *e = &sc->elst_data[i];
3333 
3334  if (version == 1) {
3335  e->duration = avio_rb64(pb);
3336  e->time = avio_rb64(pb);
3337  } else {
3338  e->duration = avio_rb32(pb); /* segment duration */
3339  e->time = (int32_t)avio_rb32(pb); /* media time */
3340  }
3341  e->rate = avio_rb32(pb) / 65536.0;
3342  av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3343  e->duration, e->time, e->rate);
3344  }
3345  sc->elst_count = i;
3346 
3347  return 0;
3348 }
3349 
3350 static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3351 {
3352  MOVStreamContext *sc;
3353 
3354  if (c->fc->nb_streams < 1)
3355  return AVERROR_INVALIDDATA;
3356  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3357  sc->timecode_track = avio_rb32(pb);
3358  return 0;
3359 }
3360 
3361 static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3362 {
3363  int ret;
3364  uint8_t uuid[16];
3365  static const uint8_t uuid_isml_manifest[] = {
3366  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3367  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3368  };
3369 
3370  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3371  return AVERROR_INVALIDDATA;
3372 
3373  ret = avio_read(pb, uuid, sizeof(uuid));
3374  if (ret < 0) {
3375  return ret;
3376  } else if (ret != sizeof(uuid)) {
3377  return AVERROR_INVALIDDATA;
3378  }
3379  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3380  uint8_t *buffer, *ptr;
3381  char *endptr;
3382  size_t len = atom.size - sizeof(uuid);
3383 
3384  if (len < 4) {
3385  return AVERROR_INVALIDDATA;
3386  }
3387  ret = avio_skip(pb, 4); // zeroes
3388  len -= 4;
3389 
3390  buffer = av_mallocz(len + 1);
3391  if (!buffer) {
3392  return AVERROR(ENOMEM);
3393  }
3394  ret = avio_read(pb, buffer, len);
3395  if (ret < 0) {
3396  av_free(buffer);
3397  return ret;
3398  } else if (ret != len) {
3399  av_free(buffer);
3400  return AVERROR_INVALIDDATA;
3401  }
3402 
3403  ptr = buffer;
3404  while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
3405  ptr += sizeof("systemBitrate=\"") - 1;
3406  c->bitrates_count++;
3407  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3408  if (!c->bitrates) {
3409  c->bitrates_count = 0;
3410  av_free(buffer);
3411  return AVERROR(ENOMEM);
3412  }
3413  errno = 0;
3414  ret = strtol(ptr, &endptr, 10);
3415  if (ret < 0 || errno || *endptr != '"') {
3416  c->bitrates[c->bitrates_count - 1] = 0;
3417  } else {
3418  c->bitrates[c->bitrates_count - 1] = ret;
3419  }
3420  }
3421 
3422  av_free(buffer);
3423  }
3424  return 0;
3425 }
3426 
3427 static int mov_read_free(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3428 {
3429  int ret;
3430  uint8_t content[16];
3431 
3432  if (atom.size < 8)
3433  return 0;
3434 
3435  ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
3436  if (ret < 0)
3437  return ret;
3438 
3439  if ( !c->found_moov
3440  && !c->found_mdat
3441  && !memcmp(content, "Anevia\x1A\x1A", 8)
3442  && c->use_mfra_for == FF_MOV_FLAG_MFRA_AUTO) {
3443  c->use_mfra_for = FF_MOV_FLAG_MFRA_PTS;
3444  }
3445 
3446  return 0;
3447 }
3448 
3449 static const MOVParseTableEntry mov_default_parse_table[] = {
3450 { MKTAG('A','C','L','R'), mov_read_aclr },
3451 { MKTAG('A','P','R','G'), mov_read_avid },
3452 { MKTAG('A','A','L','P'), mov_read_avid },
3453 { MKTAG('A','R','E','S'), mov_read_ares },
3454 { MKTAG('a','v','s','s'), mov_read_avss },
3455 { MKTAG('c','h','p','l'), mov_read_chpl },
3456 { MKTAG('c','o','6','4'), mov_read_stco },
3457 { MKTAG('c','o','l','r'), mov_read_colr },
3458 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
3459 { MKTAG('d','i','n','f'), mov_read_default },
3460 { MKTAG('D','p','x','E'), mov_read_dpxe },
3461 { MKTAG('d','r','e','f'), mov_read_dref },
3462 { MKTAG('e','d','t','s'), mov_read_default },
3463 { MKTAG('e','l','s','t'), mov_read_elst },
3464 { MKTAG('e','n','d','a'), mov_read_enda },
3465 { MKTAG('f','i','e','l'), mov_read_fiel },
3466 { MKTAG('f','t','y','p'), mov_read_ftyp },
3467 { MKTAG('g','l','b','l'), mov_read_glbl },
3468 { MKTAG('h','d','l','r'), mov_read_hdlr },
3469 { MKTAG('i','l','s','t'), mov_read_ilst },
3470 { MKTAG('j','p','2','h'), mov_read_jp2h },
3471 { MKTAG('m','d','a','t'), mov_read_mdat },
3472 { MKTAG('m','d','h','d'), mov_read_mdhd },
3473 { MKTAG('m','d','i','a'), mov_read_default },
3474 { MKTAG('m','e','t','a'), mov_read_meta },
3475 { MKTAG('m','i','n','f'), mov_read_default },
3476 { MKTAG('m','o','o','f'), mov_read_moof },
3477 { MKTAG('m','o','o','v'), mov_read_moov },
3478 { MKTAG('m','v','e','x'), mov_read_default },
3479 { MKTAG('m','v','h','d'), mov_read_mvhd },
3480 { MKTAG('S','M','I',' '), mov_read_svq3 },
3481 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
3482 { MKTAG('a','v','c','C'), mov_read_glbl },
3483 { MKTAG('p','a','s','p'), mov_read_pasp },
3484 { MKTAG('s','t','b','l'), mov_read_default },
3485 { MKTAG('s','t','c','o'), mov_read_stco },
3486 { MKTAG('s','t','p','s'), mov_read_stps },
3487 { MKTAG('s','t','r','f'), mov_read_strf },
3488 { MKTAG('s','t','s','c'), mov_read_stsc },
3489 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
3490 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
3491 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
3492 { MKTAG('s','t','t','s'), mov_read_stts },
3493 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
3494 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
3495 { MKTAG('t','f','d','t'), mov_read_tfdt },
3496 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
3497 { MKTAG('t','r','a','k'), mov_read_trak },
3498 { MKTAG('t','r','a','f'), mov_read_default },
3499 { MKTAG('t','r','e','f'), mov_read_default },
3500 { MKTAG('t','m','c','d'), mov_read_tmcd },
3501 { MKTAG('c','h','a','p'), mov_read_chap },
3502 { MKTAG('t','r','e','x'), mov_read_trex },
3503 { MKTAG('t','r','u','n'), mov_read_trun },
3504 { MKTAG('u','d','t','a'), mov_read_default },
3505 { MKTAG('w','a','v','e'), mov_read_wave },
3506 { MKTAG('e','s','d','s'), mov_read_esds },
3507 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
3508 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
3509 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
3510 { MKTAG('w','f','e','x'), mov_read_wfex },
3511 { MKTAG('c','m','o','v'), mov_read_cmov },
3512 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
3513 { MKTAG('d','v','c','1'), mov_read_dvc1 },
3514 { MKTAG('s','b','g','p'), mov_read_sbgp },
3515 { MKTAG('h','v','c','C'), mov_read_glbl },
3516 { MKTAG('u','u','i','d'), mov_read_uuid },
3517 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
3518 { MKTAG('f','r','e','e'), mov_read_free },
3519 { MKTAG('-','-','-','-'), mov_read_custom },
3520 { 0, NULL }
3521 };
3522 
3523 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3524 {
3525  int64_t total_size = 0;
3526  MOVAtom a;
3527  int i;
3528 
3529  if (c->atom_depth > 10) {
3530  av_log(c->fc, AV_LOG_ERROR, "Atoms too deeply nested\n");
3531  return AVERROR_INVALIDDATA;
3532  }
3533  c->atom_depth ++;
3534 
3535  if (atom.size < 0)
3536  atom.size = INT64_MAX;
3537  while (total_size + 8 <= atom.size && !avio_feof(pb)) {
3538  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
3539  a.size = atom.size;
3540  a.type=0;
3541  if (atom.size >= 8) {
3542  a.size = avio_rb32(pb);
3543  a.type = avio_rl32(pb);
3544  if (a.type == MKTAG('f','r','e','e') &&
3545  a.size >= 8 &&
3546  c->moov_retry) {
3547  uint8_t buf[8];
3548  uint32_t *type = (uint32_t *)buf + 1;
3549  avio_read(pb, buf, 8);
3550  avio_seek(pb, -8, SEEK_CUR);
3551  if (*type == MKTAG('m','v','h','d') ||
3552  *type == MKTAG('c','m','o','v')) {
3553  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
3554  a.type = MKTAG('m','o','o','v');
3555  }
3556  }
3557  if (atom.type != MKTAG('r','o','o','t') &&
3558  atom.type != MKTAG('m','o','o','v'))
3559  {
3560  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
3561  {
3562  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
3563  avio_skip(pb, -8);
3564  c->atom_depth --;
3565  return 0;
3566  }
3567  }
3568  total_size += 8;
3569  if (a.size == 1 && total_size + 8 <= atom.size) { /* 64 bit extended size */
3570  a.size = avio_rb64(pb) - 8;
3571  total_size += 8;
3572  }
3573  }
3574  av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3575  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3576  if (a.size == 0) {
3577  a.size = atom.size - total_size + 8;
3578  }
3579  a.size -= 8;
3580  if (a.size < 0)
3581  break;
3582  a.size = FFMIN(a.size, atom.size - total_size);
3583 
3584  for (i = 0; mov_default_parse_table[i].type; i++)
3585  if (mov_default_parse_table[i].type == a.type) {
3586  parse = mov_default_parse_table[i].parse;
3587  break;
3588  }
3589 
3590  // container is user data
3591  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3592  atom.type == MKTAG('i','l','s','t')))
3593  parse = mov_read_udta_string;
3594 
3595  if (!parse) { /* skip leaf atoms data */
3596  avio_skip(pb, a.size);
3597  } else {
3598  int64_t start_pos = avio_tell(pb);
3599  int64_t left;
3600  int err = parse(c, pb, a);
3601  if (err < 0) {
3602  c->atom_depth --;
3603  return err;
3604  }
3605  if (c->found_moov && c->found_mdat &&
3606  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3607  start_pos + a.size == avio_size(pb))) {
3608  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3609  c->next_root_atom = start_pos + a.size;
3610  c->atom_depth --;
3611  return 0;
3612  }
3613  left = a.size - avio_tell(pb) + start_pos;
3614  if (left > 0) /* skip garbage at atom end */
3615  avio_skip(pb, left);
3616  else if (left < 0) {
3617  av_log(c->fc, AV_LOG_WARNING,
3618  "overread end of atom '%.4s' by %"PRId64" bytes\n",
3619  (char*)&a.type, -left);
3620  avio_seek(pb, left, SEEK_CUR);
3621  }
3622  }
3623 
3624  total_size += a.size;
3625  }
3626 
3627  if (total_size < atom.size && atom.size < 0x7ffff)
3628  avio_skip(pb, atom.size - total_size);
3629 
3630  c->atom_depth --;
3631  return 0;
3632 }
3633 
3634 static int mov_probe(AVProbeData *p)
3635 {
3636  int64_t offset;
3637  uint32_t tag;
3638  int score = 0;
3639  int moov_offset = -1;
3640 
3641  /* check file header */
3642  offset = 0;
3643  for (;;) {
3644  /* ignore invalid offset */
3645  if ((offset + 8) > (unsigned int)p->buf_size)
3646  break;
3647  tag = AV_RL32(p->buf + offset + 4);
3648  switch(tag) {
3649  /* check for obvious tags */
3650  case MKTAG('m','o','o','v'):
3651  moov_offset = offset + 4;
3652  case MKTAG('m','d','a','t'):
3653  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3654  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3655  case MKTAG('f','t','y','p'):
3656  if (AV_RB32(p->buf+offset) < 8 &&
3657  (AV_RB32(p->buf+offset) != 1 ||
3658  offset + 12 > (unsigned int)p->buf_size ||
3659  AV_RB64(p->buf+offset + 8) == 0)) {
3660  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3661  } else if (tag == MKTAG('f','t','y','p') &&
3662  AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')) {
3663  score = FFMAX(score, 5);
3664  } else {
3665  score = AVPROBE_SCORE_MAX;
3666  }
3667  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3668  break;
3669  /* those are more common words, so rate then a bit less */
3670  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3671  case MKTAG('w','i','d','e'):
3672  case MKTAG('f','r','e','e'):
3673  case MKTAG('j','u','n','k'):
3674  case MKTAG('p','i','c','t'):
3675  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3676  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3677  break;
3678  case MKTAG(0x82,0x82,0x7f,0x7d):
3679  case MKTAG('s','k','i','p'):
3680  case MKTAG('u','u','i','d'):
3681  case MKTAG('p','r','f','l'):
3682  /* if we only find those cause probedata is too small at least rate them */
3683  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3684  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3685  break;
3686  default:
3687  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3688  }
3689  }
3690  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3691  /* moov atom in the header - we should make sure that this is not a
3692  * MOV-packed MPEG-PS */
3693  offset = moov_offset;
3694 
3695  while(offset < (p->buf_size - 16)){ /* Sufficient space */
3696  /* We found an actual hdlr atom */
3697  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3698  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3699  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3700  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3701  /* We found a media handler reference atom describing an
3702  * MPEG-PS-in-MOV, return a
3703  * low score to force expanding the probe window until
3704  * mpegps_probe finds what it needs */
3705  return 5;
3706  }else
3707  /* Keep looking */
3708  offset+=2;
3709  }
3710  }
3711 
3712  return score;
3713 }
3714 
3715 // must be done after parsing all trak because there's no order requirement
3716 static void mov_read_chapters(AVFormatContext *s)
3717 {
3718  MOVContext *mov = s->priv_data;
3719  AVStream *st = NULL;
3720  MOVStreamContext *sc;
3721  int64_t cur_pos;
3722  int i;
3723 
3724  for (i = 0; i < s->nb_streams; i++)
3725  if (s->streams[i]->id == mov->chapter_track) {
3726  st = s->streams[i];
3727  break;
3728  }
3729  if (!st) {
3730  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3731  return;
3732  }
3733 
3734  st->discard = AVDISCARD_ALL;
3735  sc = st->priv_data;
3736  cur_pos = avio_tell(sc->pb);
3737 
3738  for (i = 0; i < st->nb_index_entries; i++) {
3739  AVIndexEntry *sample = &st->index_entries[i];
3740  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3741  uint8_t *title;
3742  uint16_t ch;
3743  int len, title_len;
3744 
3745  if (end < sample->timestamp) {
3746  av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
3747  end = AV_NOPTS_VALUE;
3748  }
3749 
3750  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3751  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3752  goto finish;
3753  }
3754 
3755  // the first two bytes are the length of the title
3756  len = avio_rb16(sc->pb);
3757  if (len > sample->size-2)
3758  continue;
3759  title_len = 2*len + 1;
3760  if (!(title = av_mallocz(title_len)))
3761  goto finish;
3762 
3763  // The samples could theoretically be in any encoding if there's an encd
3764  // atom following, but in practice are only utf-8 or utf-16, distinguished
3765  // instead by the presence of a BOM
3766  if (!len) {
3767  title[0] = 0;
3768  } else {
3769  ch = avio_rb16(sc->pb);
3770  if (ch == 0xfeff)
3771  avio_get_str16be(sc->pb, len, title, title_len);
3772  else if (ch == 0xfffe)
3773  avio_get_str16le(sc->pb, len, title, title_len);
3774  else {
3775  AV_WB16(title, ch);
3776  if (len == 1 || len == 2)
3777  title[len] = 0;
3778  else
3779  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3780  }
3781  }
3782 
3783  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3784  av_freep(&title);
3785  }
3786 finish:
3787  avio_seek(sc->pb, cur_pos, SEEK_SET);
3788 }
3789 
3790 static int parse_timecode_in_framenum_format(AVFormatContext *s, AVStream *st,
3791  uint32_t value, int flags)
3792 {
3793  AVTimecode tc;
3794  char buf[AV_TIMECODE_STR_SIZE];
3795  AVRational rate = {st->codec->time_base.den,
3796  st->codec->time_base.num};
3797  int ret = av_timecode_init(&tc, rate, flags, 0, s);
3798  if (ret < 0)
3799  return ret;
3800  av_dict_set(&st->metadata, "timecode",
3801  av_timecode_make_string(&tc, buf, value), 0);
3802  return 0;
3803 }
3804 
3805 static int mov_read_timecode_track(AVFormatContext *s, AVStream *st)
3806 {
3807  MOVStreamContext *sc = st->priv_data;
3808  int flags = 0;
3809  int64_t cur_pos = avio_tell(sc->pb);
3810  uint32_t value;
3811 
3812  if (!st->nb_index_entries)
3813  return -1;
3814 
3815  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3816  value = avio_rb32(s->pb);
3817 
3818  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3819  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3820  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3821 
3822  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3823  * not the case) and thus assume "frame number format" instead of QT one.
3824  * No sample with tmcd track can be found with a QT timecode at the moment,
3825  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3826  * format). */
3827  parse_timecode_in_framenum_format(s, st, value, flags);
3828 
3829  avio_seek(sc->pb, cur_pos, SEEK_SET);
3830  return 0;
3831 }
3832 
3833 static int mov_read_close(AVFormatContext *s)
3834 {
3835  MOVContext *mov = s->priv_data;
3836  int i, j;
3837 
3838  for (i = 0; i < s->nb_streams; i++) {
3839  AVStream *st = s->streams[i];
3840  MOVStreamContext *sc = st->priv_data;
3841 
3842  av_freep(&sc->ctts_data);
3843  for (j = 0; j < sc->drefs_count; j++) {
3844  av_freep(&sc->drefs[j].path);
3845  av_freep(&sc->drefs[j].dir);
3846  }
3847  av_freep(&sc->drefs);
3848 
3849  sc->drefs_count = 0;
3850 
3851  if (!sc->pb_is_copied)
3852  avio_closep(&sc->pb);
3853 
3854  sc->pb = NULL;
3855  av_freep(&sc->chunk_offsets);
3856  av_freep(&sc->stsc_data);
3857  av_freep(&sc->sample_sizes);
3858  av_freep(&sc->keyframes);
3859  av_freep(&sc->stts_data);
3860  av_freep(&sc->stps_data);
3861  av_freep(&sc->elst_data);
3862  av_freep(&sc->rap_group);
3863  av_freep(&sc->display_matrix);
3864  }
3865 
3866  if (mov->dv_demux) {
3867  avformat_free_context(mov->dv_fctx);
3868  mov->dv_fctx = NULL;
3869  }
3870 
3871  av_freep(&mov->trex_data);
3872  av_freep(&mov->bitrates);
3873 
3874  for (i = 0; i < mov->fragment_index_count; i++) {
3875  MOVFragmentIndex* index = mov->fragment_index_data[i];
3876  av_freep(&index->items);
3877  av_freep(&mov->fragment_index_data[i]);
3878  }
3879  av_freep(&mov->fragment_index_data);
3880 
3881  return 0;
3882 }
3883 
3884 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
3885 {
3886  int i;
3887 
3888  for (i = 0; i < s->nb_streams; i++) {
3889  AVStream *st = s->streams[i];
3890  MOVStreamContext *sc = st->priv_data;
3891 
3892  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3893  sc->timecode_track == tmcd_id)
3894  return 1;
3895  }
3896  return 0;
3897 }
3898 
3899 /* look for a tmcd track not referenced by any video track, and export it globally */
3900 static void export_orphan_timecode(AVFormatContext *s)
3901 {
3902  int i;
3903 
3904  for (i = 0; i < s->nb_streams; i++) {
3905  AVStream *st = s->streams[i];
3906 
3907  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
3908  !tmcd_is_referenced(s, i + 1)) {
3909  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
3910  if (tcr) {
3911  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
3912  break;
3913  }
3914  }
3915  }
3916 }
3917 
3918 static int read_tfra(MOVContext *mov, AVIOContext *f)
3919 {
3920  MOVFragmentIndex* index = NULL;
3921  int version, fieldlength, i, j;
3922  int64_t pos = avio_tell(f);
3923  uint32_t size = avio_rb32(f);
3924  void *tmp;
3925 
3926  if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a')) {
3927  return 1;
3928  }
3929  av_log(mov->fc, AV_LOG_VERBOSE, "found tfra\n");
3930  index = av_mallocz(sizeof(MOVFragmentIndex));
3931  if (!index) {
3932  return AVERROR(ENOMEM);
3933  }
3934 
3935  tmp = av_realloc_array(mov->fragment_index_data,
3936  mov->fragment_index_count + 1,
3937  sizeof(MOVFragmentIndex*));
3938  if (!tmp) {
3939  av_freep(&index);
3940  return AVERROR(ENOMEM);
3941  }
3942  mov->fragment_index_data = tmp;
3943  mov->fragment_index_data[mov->fragment_index_count++] = index;
3944 
3945  version = avio_r8(f);
3946  avio_rb24(f);
3947  index->track_id = avio_rb32(f);
3948  fieldlength = avio_rb32(f);
3949  index->item_count = avio_rb32(f);
3950  index->items = av_mallocz_array(
3951  index->item_count, sizeof(MOVFragmentIndexItem));
3952  if (!index->items) {
3953  index->item_count = 0;
3954  return AVERROR(ENOMEM);
3955  }
3956  for (i = 0; i < index->item_count; i++) {
3957  int64_t time, offset;
3958  if (version == 1) {
3959  time = avio_rb64(f);
3960  offset = avio_rb64(f);
3961  } else {
3962  time = avio_rb32(f);
3963  offset = avio_rb32(f);
3964  }
3965  index->items[i].time = time;
3966  index->items[i].moof_offset = offset;
3967  for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
3968  avio_r8(f);
3969  for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
3970  avio_r8(f);
3971  for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
3972  avio_r8(f);
3973  }
3974 
3975  avio_seek(f, pos + size, SEEK_SET);
3976  return 0;
3977 }
3978 
3979 static int mov_read_mfra(MOVContext *c, AVIOContext *f)
3980 {
3981  int64_t stream_size = avio_size(f);
3982  int64_t original_pos = avio_tell(f);
3983  int64_t seek_ret;
3984  int32_t mfra_size;
3985  int ret = -1;
3986  if ((seek_ret = avio_seek(f, stream_size - 4, SEEK_SET)) < 0) {
3987  ret = seek_ret;
3988  goto fail;
3989  }
3990  mfra_size = avio_rb32(f);
3991  if (mfra_size < 0 || mfra_size > stream_size) {
3992  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (unreasonable size)\n");
3993  goto fail;
3994  }
3995  if ((seek_ret = avio_seek(f, -mfra_size, SEEK_CUR)) < 0) {
3996  ret = seek_ret;
3997  goto fail;
3998  }
3999  if (avio_rb32(f) != mfra_size) {
4000  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (size mismatch)\n");
4001  goto fail;
4002  }
4003  if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
4004  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (tag mismatch)\n");
4005  goto fail;
4006  }
4007  av_log(c->fc, AV_LOG_VERBOSE, "stream has mfra\n");
4008  do {
4009  ret = read_tfra(c, f);
4010  if (ret < 0)
4011  goto fail;
4012  } while (!ret);
4013  ret = 0;
4014 fail:
4015  seek_ret = avio_seek(f, original_pos, SEEK_SET);
4016  if (seek_ret < 0) {
4017  av_log(c->fc, AV_LOG_ERROR,
4018  "failed to seek back after looking for mfra\n");
4019  ret = seek_ret;
4020  }
4021  return ret;
4022 }
4023 
4024 static int mov_read_header(AVFormatContext *s)
4025 {
4026  MOVContext *mov = s->priv_data;
4027  AVIOContext *pb = s->pb;
4028  int j, err;
4029  MOVAtom atom = { AV_RL32("root") };
4030  int i;
4031 
4032  mov->fc = s;
4033  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
4034  if (pb->seekable)
4035  atom.size = avio_size(pb);
4036  else
4037  atom.size = INT64_MAX;
4038 
4039  /* check MOV header */
4040  do {
4041  if (mov->moov_retry)
4042  avio_seek(pb, 0, SEEK_SET);
4043  if ((err = mov_read_default(mov, pb, atom)) < 0) {
4044  av_log(s, AV_LOG_ERROR, "error reading header\n");
4045  mov_read_close(s);
4046  return err;
4047  }
4048  } while (pb->seekable && !mov->found_moov && !mov->moov_retry++);
4049  if (!mov->found_moov) {
4050  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
4051  mov_read_close(s);
4052  return AVERROR_INVALIDDATA;
4053  }
4054  av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
4055 
4056  if (pb->seekable) {
4057  if (mov->chapter_track > 0)
4058  mov_read_chapters(s);
4059  for (i = 0; i < s->nb_streams; i++)
4060  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
4061  mov_read_timecode_track(s, s->streams[i]);
4062  }
4063 
4064  /* copy timecode metadata from tmcd tracks to the related video streams */
4065  for (i = 0; i < s->nb_streams; i++) {
4066  AVStream *st = s->streams[i];
4067  MOVStreamContext *sc = st->priv_data;
4068  if (sc->timecode_track > 0) {
4069  AVDictionaryEntry *tcr;
4070  int tmcd_st_id = -1;
4071 
4072  for (j = 0; j < s->nb_streams; j++)
4073  if (s->streams[j]->id == sc->timecode_track)
4074  tmcd_st_id = j;
4075 
4076  if (tmcd_st_id < 0 || tmcd_st_id == i)
4077  continue;
4078  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
4079  if (tcr)
4080  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
4081  }
4082  }
4083  export_orphan_timecode(s);
4084 
4085  for (i = 0; i < s->nb_streams; i++) {
4086  AVStream *st = s->streams[i];
4087  MOVStreamContext *sc = st->priv_data;
4088  fix_timescale(mov, sc);
4089  if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_AAC) {
4090  st->skip_samples = sc->start_pad;
4091  }
4092  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
4093  av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
4094  sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
4095  if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
4096  if (st->codec->width <= 0 || st->codec->height <= 0) {
4097  st->codec->width = sc->width;
4098  st->codec->height = sc->height;
4099  }
4100  if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
4101  if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
4102  return err;
4103  }
4104  }
4105  }
4106 
4107  if (mov->trex_data) {
4108  for (i = 0; i < s->nb_streams; i++) {
4109  AVStream *st = s->streams[i];
4110  MOVStreamContext *sc = st->priv_data;
4111  if (st->duration > 0)
4112  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
4113  }
4114  }
4115 
4116  if (mov->use_mfra_for > 0) {
4117  for (i = 0; i < s->nb_streams; i++) {
4118  AVStream *st = s->streams[i];
4119  MOVStreamContext *sc = st->priv_data;
4120  if (sc->duration_for_fps > 0) {
4121  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale /
4122  sc->duration_for_fps;
4123  }
4124  }
4125  }
4126 
4127  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
4128  if (mov->bitrates[i]) {
4129  s->streams[i]->codec->bit_rate = mov->bitrates[i];
4130  }
4131  }
4132 
4133  ff_rfps_calculate(s);
4134 
4135  for (i = 0; i < s->nb_streams; i++) {
4136  AVStream *st = s->streams[i];
4137  MOVStreamContext *sc = st->priv_data;
4138 
4139  switch (st->codec->codec_type) {
4140  case AVMEDIA_TYPE_AUDIO:
4141  err = ff_replaygain_export(st, s->metadata);
4142  if (err < 0) {
4143  mov_read_close(s);
4144  return err;
4145  }
4146  break;
4147  case AVMEDIA_TYPE_VIDEO:
4148  if (sc->display_matrix) {
4149  AVPacketSideData *sd, *tmp;
4150 
4151  tmp = av_realloc_array(st->side_data,
4152  st->nb_side_data + 1, sizeof(*tmp));
4153  if (!tmp)
4154  return AVERROR(ENOMEM);
4155 
4156  st->side_data = tmp;
4157  st->nb_side_data++;
4158 
4159  sd = &st->side_data[st->nb_side_data - 1];
4160  sd->type = AV_PKT_DATA_DISPLAYMATRIX;
4161  sd->size = sizeof(int32_t) * 9;
4162  sd->data = (uint8_t*)sc->display_matrix;
4163  sc->display_matrix = NULL;
4164  }
4165  break;
4166  }
4167  }
4168 
4169  return 0;
4170 }
4171 
4172 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
4173 {
4174  AVIndexEntry *sample = NULL;
4175  int64_t best_dts = INT64_MAX;
4176  int i;
4177  for (i = 0; i < s->nb_streams; i++) {
4178  AVStream *avst = s->streams[i];
4179  MOVStreamContext *msc = avst->priv_data;
4180  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
4181  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
4182  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
4183  av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
4184  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
4185  (s->pb->seekable &&
4186  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
4187  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
4188  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
4189  sample = current_sample;
4190  best_dts = dts;
4191  *st = avst;
4192  }
4193  }
4194  }
4195  return sample;
4196 }
4197 
4198 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
4199 {
4200  MOVContext *mov = s->priv_data;
4201  MOVStreamContext *sc;
4202  AVIndexEntry *sample;
4203  AVStream *st = NULL;
4204  int ret;
4205  mov->fc = s;
4206  retry:
4207  sample = mov_find_next_sample(s, &st);
4208  if (!sample) {
4209  mov->found_mdat = 0;
4210  if (!mov->next_root_atom)
4211  return AVERROR_EOF;
4212  avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
4213  mov->next_root_atom = 0;
4214  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
4215  avio_feof(s->pb))
4216  return AVERROR_EOF;
4217  av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
4218  goto retry;
4219  }
4220  sc = st->priv_data;
4221  /* must be done just before reading, to avoid infinite loop on sample */
4222  sc->current_sample++;
4223 
4224  if (mov->next_root_atom) {
4225  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
4226  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
4227  }
4228 
4229  if (st->discard != AVDISCARD_ALL) {
4230  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
4231  av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
4232  sc->ffindex, sample->pos);
4233  return AVERROR_INVALIDDATA;
4234  }
4235  ret = av_get_packet(sc->pb, pkt, sample->size);
4236  if (ret < 0)
4237  return ret;
4238  if (sc->has_palette) {
4239  uint8_t *pal;
4240 
4241  pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
4242  if (!pal) {
4243  av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
4244  } else {
4245  memcpy(pal, sc->palette, AVPALETTE_SIZE);
4246  sc->has_palette = 0;
4247  }
4248  }
4249 #if CONFIG_DV_DEMUXER
4250  if (mov->dv_demux && sc->dv_audio_container) {
4251  avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
4252  av_freep(&pkt->data);
4253  pkt->size = 0;
4254  ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
4255  if (ret < 0)
4256  return ret;
4257  }
4258 #endif
4259  }
4260 
4261  pkt->stream_index = sc->ffindex;
4262  pkt->dts = sample->timestamp;
4263  if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
4264  pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
4265  /* update ctts context */
4266  sc->ctts_sample++;
4267  if (sc->ctts_index < sc->ctts_count &&
4268  sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
4269  sc->ctts_index++;
4270  sc->ctts_sample = 0;
4271  }
4272  if (sc->wrong_dts)
4273  pkt->dts = AV_NOPTS_VALUE;
4274  } else {
4275  int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
4276  st->index_entries[sc->current_sample].timestamp : st->duration;
4277  pkt->duration = next_dts - pkt->dts;
4278  pkt->pts = pkt->dts;
4279  }
4280  if (st->discard == AVDISCARD_ALL)
4281  goto retry;
4282  pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
4283  pkt->pos = sample->pos;
4284  av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
4285  pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
4286  return 0;
4287 }
4288 
4289 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
4290 {
4291  MOVStreamContext *sc = st->priv_data;
4292  int sample, time_sample;
4293  int i;
4294 
4295  sample = av_index_search_timestamp(st, timestamp, flags);
4296  av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
4297  if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
4298  sample = 0;
4299  if (sample < 0) /* not sure what to do */
4300  return AVERROR_INVALIDDATA;
4301  sc->current_sample = sample;
4302  av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
4303  /* adjust ctts index */
4304  if (sc->ctts_data) {
4305  time_sample = 0;
4306  for (i = 0; i < sc->ctts_count; i++) {
4307  int next = time_sample + sc->ctts_data[i].count;
4308  if (next > sc->current_sample) {
4309  sc->ctts_index = i;
4310  sc->ctts_sample = sc->current_sample - time_sample;
4311  break;
4312  }
4313  time_sample = next;
4314  }
4315  }
4316  return sample;
4317 }
4318 
4319 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
4320 {
4321  AVStream *st;
4322  int64_t seek_timestamp, timestamp;
4323  int sample;
4324  int i;
4325 
4326  if (stream_index >= s->nb_streams)
4327  return AVERROR_INVALIDDATA;
4328 
4329  st = s->streams[stream_index];
4330  sample = mov_seek_stream(s, st, sample_time, flags);
4331  if (sample < 0)
4332  return sample;
4333 
4334  /* adjust seek timestamp to found sample timestamp */
4335  seek_timestamp = st->index_entries[sample].timestamp;
4336 
4337  for (i = 0; i < s->nb_streams; i++) {
4338  MOVStreamContext *sc = s->streams[i]->priv_data;
4339  st = s->streams[i];
4340  st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
4341 
4342  if (stream_index == i)
4343  continue;
4344 
4345  timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
4346  mov_seek_stream(s, st, timestamp, flags);
4347  }
4348  return 0;
4349 }
4350 
4351 #define OFFSET(x) offsetof(MOVContext, x)
4352 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
4353 static const AVOption mov_options[] = {
4354  {"use_absolute_path",
4355  "allow using absolute path when opening alias, this is a possible security issue",
4356  OFFSET(use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
4357  0, 1, FLAGS},
4358  {"ignore_editlist", "", OFFSET(ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
4359  0, 1, FLAGS},
4360  {"use_mfra_for",
4361  "use mfra for fragment timestamps",
4362  OFFSET(use_mfra_for), FF_OPT_TYPE_INT, {.i64 = FF_MOV_FLAG_MFRA_AUTO},
4363  -1, FF_MOV_FLAG_MFRA_PTS, FLAGS,
4364  "use_mfra_for"},
4365  {"auto", "auto", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_AUTO}, 0, 0,
4366  FLAGS, "use_mfra_for" },
4367  {"dts", "dts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_DTS}, 0, 0,
4368  FLAGS, "use_mfra_for" },
4369  {"pts", "pts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_PTS}, 0, 0,
4370  FLAGS, "use_mfra_for" },
4371  { "export_all", "Export unrecognized metadata entries", OFFSET(export_all),
4372  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = FLAGS },
4373  { "export_xmp", "Export full XMP metadata", OFFSET(export_xmp),
4374  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = FLAGS },
4375  { NULL },
4376 };
4377 
4378 static const AVClass mov_class = {
4379  .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
4380  .item_name = av_default_item_name,
4381  .option = mov_options,
4382  .version = LIBAVUTIL_VERSION_INT,
4383 };
4384 
4385 AVInputFormat ff_mov_demuxer = {
4386  .name = "mov,mp4,m4a,3gp,3g2,mj2",
4387  .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
4388  .priv_class = &mov_class,
4389  .priv_data_size = sizeof(MOVContext),
4390  .extensions = "mov,mp4,m4a,3gp,3g2,mj2",
4391  .read_probe = mov_probe,
4392  .read_header = mov_read_header,
4393  .read_packet = mov_read_packet,
4394  .read_close = mov_read_close,
4395  .read_seek = mov_read_seek,
4396  .flags = AVFMT_NO_BYTE_SEEK,
4397 };
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