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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[200], place[100];
210  uint16_t langcode = 0;
211  double longitude, latitude, altitude;
212  const char *key = "location";
213 
214  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
215  av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
216  return AVERROR_INVALIDDATA;
217  }
218 
219  avio_skip(pb, 4); // version+flags
220  langcode = avio_rb16(pb);
221  ff_mov_lang_to_iso639(langcode, language);
222  len -= 6;
223 
224  len -= avio_get_str(pb, len, place, sizeof(place));
225  if (len < 1) {
226  av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
227  return AVERROR_INVALIDDATA;
228  }
229  avio_skip(pb, 1); // role
230  len -= 1;
231 
232  if (len < 12) {
233  av_log(c->fc, AV_LOG_ERROR, "no space for coordinates left (%d)\n", len);
234  return AVERROR_INVALIDDATA;
235  }
236  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
237  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
238  altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
239 
240  // Try to output in the same format as the ?xyz field
241  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
242  if (altitude)
243  av_strlcatf(buf, sizeof(buf), "%+f", altitude);
244  av_strlcatf(buf, sizeof(buf), "/%s", place);
245 
246  if (*language && strcmp(language, "und")) {
247  char key2[16];
248  snprintf(key2, sizeof(key2), "%s-%s", key, language);
249  av_dict_set(&c->fc->metadata, key2, buf, 0);
250  }
251  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
252  return av_dict_set(&c->fc->metadata, key, buf, 0);
253 }
254 
255 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
256 {
257  char tmp_key[5];
258  char key2[32], language[4] = {0};
259  char *str = NULL;
260  const char *key = NULL;
261  uint16_t langcode = 0;
262  uint32_t data_type = 0, str_size, str_size_alloc;
263  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
264  int raw = 0;
265 
266  switch (atom.type) {
267  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
268  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
269  case MKTAG( 'X','M','P','_'):
270  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
271  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
272  case MKTAG( 'a','k','I','D'): key = "account_type";
273  parse = mov_metadata_int8_no_padding; break;
274  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
275  case MKTAG( 'c','a','t','g'): key = "category"; break;
276  case MKTAG( 'c','p','i','l'): key = "compilation";
277  parse = mov_metadata_int8_no_padding; break;
278  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
279  case MKTAG( 'd','e','s','c'): key = "description"; break;
280  case MKTAG( 'd','i','s','k'): key = "disc";
281  parse = mov_metadata_track_or_disc_number; break;
282  case MKTAG( 'e','g','i','d'): key = "episode_uid";
283  parse = mov_metadata_int8_no_padding; break;
284  case MKTAG( 'g','n','r','e'): key = "genre";
285  parse = mov_metadata_gnre; break;
286  case MKTAG( 'h','d','v','d'): key = "hd_video";
287  parse = mov_metadata_int8_no_padding; break;
288  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
289  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
290  case MKTAG( 'l','o','c','i'):
291  return mov_metadata_loci(c, pb, atom.size);
292  case MKTAG( 'p','c','s','t'): key = "podcast";
293  parse = mov_metadata_int8_no_padding; break;
294  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
295  parse = mov_metadata_int8_no_padding; break;
296  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
297  case MKTAG( 'r','t','n','g'): key = "rating";
298  parse = mov_metadata_int8_no_padding; break;
299  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
300  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
301  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
302  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
303  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
304  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
305  case MKTAG( 's','t','i','k'): key = "media_type";
306  parse = mov_metadata_int8_no_padding; break;
307  case MKTAG( 't','r','k','n'): key = "track";
308  parse = mov_metadata_track_or_disc_number; break;
309  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
310  case MKTAG( 't','v','e','s'): key = "episode_sort";
311  parse = mov_metadata_int8_bypass_padding; break;
312  case MKTAG( 't','v','n','n'): key = "network"; break;
313  case MKTAG( 't','v','s','h'): key = "show"; break;
314  case MKTAG( 't','v','s','n'): key = "season_number";
315  parse = mov_metadata_int8_bypass_padding; break;
316  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
317  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
318  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
319  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
320  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
321  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
322  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
323  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
324  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
325  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
326  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
327  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
328  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
329  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
330  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
331  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
332  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
333  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
334  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
335  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
336  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
337  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
338  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
339  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
340  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
341  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
342  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
343  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
344  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
345  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
346  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
347  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
348  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
349  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
350  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
351  }
352 retry:
353  if (c->itunes_metadata && atom.size > 8) {
354  int data_size = avio_rb32(pb);
355  int tag = avio_rl32(pb);
356  if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
357  data_type = avio_rb32(pb); // type
358  avio_rb32(pb); // unknown
359  str_size = data_size - 16;
360  atom.size -= 16;
361 
362  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
363  int ret = mov_read_covr(c, pb, data_type, str_size);
364  if (ret < 0) {
365  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
366  }
367  return ret;
368  }
369  } else return 0;
370  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
371  str_size = avio_rb16(pb); // string length
372  if (str_size > atom.size) {
373  raw = 1;
374  avio_seek(pb, -2, SEEK_CUR);
375  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
376  goto retry;
377  }
378  langcode = avio_rb16(pb);
379  ff_mov_lang_to_iso639(langcode, language);
380  atom.size -= 4;
381  } else
382  str_size = atom.size;
383 
384  if (c->export_all && !key) {
385  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
386  key = tmp_key;
387  }
388 
389  if (!key)
390  return 0;
391  if (atom.size < 0 || str_size >= INT_MAX/2)
392  return AVERROR_INVALIDDATA;
393 
394  // worst-case requirement for output string in case of utf8 coded input
395  str_size_alloc = (raw ? str_size : str_size * 2) + 1;
396  str = av_mallocz(str_size_alloc);
397  if (!str)
398  return AVERROR(ENOMEM);
399 
400  if (parse)
401  parse(c, pb, str_size, key);
402  else {
403  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
404  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
405  } else {
406  int ret = ffio_read_size(pb, str, str_size);
407  if (ret < 0) {
408  av_free(str);
409  return ret;
410  }
411  str[str_size] = 0;
412  }
413  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
414  av_dict_set(&c->fc->metadata, key, str, 0);
415  if (*language && strcmp(language, "und")) {
416  snprintf(key2, sizeof(key2), "%s-%s", key, language);
417  av_dict_set(&c->fc->metadata, key2, str, 0);
418  }
419  }
420  av_log(c->fc, AV_LOG_TRACE, "lang \"%3s\" ", language);
421  av_log(c->fc, AV_LOG_TRACE, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
422  key, str, (char*)&atom.type, str_size_alloc, atom.size);
423 
424  av_freep(&str);
425  return 0;
426 }
427 
428 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
429 {
430  int64_t start;
431  int i, nb_chapters, str_len, version;
432  char str[256+1];
433  int ret;
434 
435  if ((atom.size -= 5) < 0)
436  return 0;
437 
438  version = avio_r8(pb);
439  avio_rb24(pb);
440  if (version)
441  avio_rb32(pb); // ???
442  nb_chapters = avio_r8(pb);
443 
444  for (i = 0; i < nb_chapters; i++) {
445  if (atom.size < 9)
446  return 0;
447 
448  start = avio_rb64(pb);
449  str_len = avio_r8(pb);
450 
451  if ((atom.size -= 9+str_len) < 0)
452  return 0;
453 
454  ret = ffio_read_size(pb, str, str_len);
455  if (ret < 0)
456  return ret;
457  str[str_len] = 0;
458  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
459  }
460  return 0;
461 }
462 
463 #define MIN_DATA_ENTRY_BOX_SIZE 12
464 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
465 {
466  AVStream *st;
467  MOVStreamContext *sc;
468  int entries, i, j;
469 
470  if (c->fc->nb_streams < 1)
471  return 0;
472  st = c->fc->streams[c->fc->nb_streams-1];
473  sc = st->priv_data;
474 
475  avio_rb32(pb); // version + flags
476  entries = avio_rb32(pb);
477  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
478  entries >= UINT_MAX / sizeof(*sc->drefs))
479  return AVERROR_INVALIDDATA;
480  av_free(sc->drefs);
481  sc->drefs_count = 0;
482  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
483  if (!sc->drefs)
484  return AVERROR(ENOMEM);
485  sc->drefs_count = entries;
486 
487  for (i = 0; i < sc->drefs_count; i++) {
488  MOVDref *dref = &sc->drefs[i];
489  uint32_t size = avio_rb32(pb);
490  int64_t next = avio_tell(pb) + size - 4;
491 
492  if (size < 12)
493  return AVERROR_INVALIDDATA;
494 
495  dref->type = avio_rl32(pb);
496  avio_rb32(pb); // version + flags
497  av_log(c->fc, AV_LOG_TRACE, "type %.4s size %d\n", (char*)&dref->type, size);
498 
499  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
500  /* macintosh alias record */
501  uint16_t volume_len, len;
502  int16_t type;
503  int ret;
504 
505  avio_skip(pb, 10);
506 
507  volume_len = avio_r8(pb);
508  volume_len = FFMIN(volume_len, 27);
509  ret = ffio_read_size(pb, dref->volume, 27);
510  if (ret < 0)
511  return ret;
512  dref->volume[volume_len] = 0;
513  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
514 
515  avio_skip(pb, 12);
516 
517  len = avio_r8(pb);
518  len = FFMIN(len, 63);
519  ret = ffio_read_size(pb, dref->filename, 63);
520  if (ret < 0)
521  return ret;
522  dref->filename[len] = 0;
523  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
524 
525  avio_skip(pb, 16);
526 
527  /* read next level up_from_alias/down_to_target */
528  dref->nlvl_from = avio_rb16(pb);
529  dref->nlvl_to = avio_rb16(pb);
530  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
531  dref->nlvl_from, dref->nlvl_to);
532 
533  avio_skip(pb, 16);
534 
535  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
536  if(avio_feof(pb))
537  return AVERROR_EOF;
538  type = avio_rb16(pb);
539  len = avio_rb16(pb);
540  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
541  if (len&1)
542  len += 1;
543  if (type == 2 || type == 18) { // absolute path
544  av_free(dref->path);
545  dref->path = av_mallocz(len+1);
546  if (!dref->path)
547  return AVERROR(ENOMEM);
548 
549  ret = ffio_read_size(pb, dref->path, len);
550  if (ret < 0) {
551  av_freep(&dref->path);
552  return ret;
553  }
554  if (type == 18) // no additional processing needed
555  continue;
556  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
557  len -= volume_len;
558  memmove(dref->path, dref->path+volume_len, len);
559  dref->path[len] = 0;
560  }
561  for (j = 0; j < len; j++)
562  if (dref->path[j] == ':')
563  dref->path[j] = '/';
564  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
565  } else if (type == 0) { // directory name
566  av_free(dref->dir);
567  dref->dir = av_malloc(len+1);
568  if (!dref->dir)
569  return AVERROR(ENOMEM);
570 
571  ret = ffio_read_size(pb, dref->dir, len);
572  if (ret < 0) {
573  av_freep(&dref->dir);
574  return ret;
575  }
576  dref->dir[len] = 0;
577  for (j = 0; j < len; j++)
578  if (dref->dir[j] == ':')
579  dref->dir[j] = '/';
580  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
581  } else
582  avio_skip(pb, len);
583  }
584  }
585  avio_seek(pb, next, SEEK_SET);
586  }
587  return 0;
588 }
589 
590 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
591 {
592  AVStream *st;
593  uint32_t type;
594  uint32_t av_unused ctype;
595  int64_t title_size;
596  char *title_str;
597  int ret;
598 
599  if (c->fc->nb_streams < 1) // meta before first trak
600  return 0;
601 
602  st = c->fc->streams[c->fc->nb_streams-1];
603 
604  avio_r8(pb); /* version */
605  avio_rb24(pb); /* flags */
606 
607  /* component type */
608  ctype = avio_rl32(pb);
609  type = avio_rl32(pb); /* component subtype */
610 
611  av_log(c->fc, AV_LOG_TRACE, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
612  av_log(c->fc, AV_LOG_TRACE, "stype= %.4s\n", (char*)&type);
613 
614  if (type == MKTAG('v','i','d','e'))
615  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
616  else if (type == MKTAG('s','o','u','n'))
617  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
618  else if (type == MKTAG('m','1','a',' '))
619  st->codec->codec_id = AV_CODEC_ID_MP2;
620  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
621  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
622 
623  avio_rb32(pb); /* component manufacture */
624  avio_rb32(pb); /* component flags */
625  avio_rb32(pb); /* component flags mask */
626 
627  title_size = atom.size - 24;
628  if (title_size > 0) {
629  title_str = av_malloc(title_size + 1); /* Add null terminator */
630  if (!title_str)
631  return AVERROR(ENOMEM);
632 
633  ret = ffio_read_size(pb, title_str, title_size);
634  if (ret < 0) {
635  av_freep(&title_str);
636  return ret;
637  }
638  title_str[title_size] = 0;
639  if (title_str[0]) {
640  int off = (!c->isom && title_str[0] == title_size - 1);
641  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
642  }
643  av_freep(&title_str);
644  }
645 
646  return 0;
647 }
648 
649 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
650 {
651  AVStream *st;
652  int tag;
653 
654  if (fc->nb_streams < 1)
655  return 0;
656  st = fc->streams[fc->nb_streams-1];
657 
658  avio_rb32(pb); /* version + flags */
659  ff_mp4_read_descr(fc, pb, &tag);
660  if (tag == MP4ESDescrTag) {
661  ff_mp4_parse_es_descr(pb, NULL);
662  } else
663  avio_rb16(pb); /* ID */
664 
665  ff_mp4_read_descr(fc, pb, &tag);
666  if (tag == MP4DecConfigDescrTag)
667  ff_mp4_read_dec_config_descr(fc, st, pb);
668  return 0;
669 }
670 
671 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
672 {
673  return ff_mov_read_esds(c->fc, pb);
674 }
675 
676 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
677 {
678  AVStream *st;
679  enum AVAudioServiceType *ast;
680  int ac3info, acmod, lfeon, bsmod;
681 
682  if (c->fc->nb_streams < 1)
683  return 0;
684  st = c->fc->streams[c->fc->nb_streams-1];
685 
686  ast = (enum AVAudioServiceType*)ff_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
687  sizeof(*ast));
688  if (!ast)
689  return AVERROR(ENOMEM);
690 
691  ac3info = avio_rb24(pb);
692  bsmod = (ac3info >> 14) & 0x7;
693  acmod = (ac3info >> 11) & 0x7;
694  lfeon = (ac3info >> 10) & 0x1;
695  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
696  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
697  if (lfeon)
698  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
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_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
709 {
710  AVStream *st;
711  enum AVAudioServiceType *ast;
712  int eac3info, acmod, lfeon, bsmod;
713 
714  if (c->fc->nb_streams < 1)
715  return 0;
716  st = c->fc->streams[c->fc->nb_streams-1];
717 
718  ast = (enum AVAudioServiceType*)ff_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
719  sizeof(*ast));
720  if (!ast)
721  return AVERROR(ENOMEM);
722 
723  /* No need to parse fields for additional independent substreams and its
724  * associated dependent substreams since libavcodec's E-AC-3 decoder
725  * does not support them yet. */
726  avio_rb16(pb); /* data_rate and num_ind_sub */
727  eac3info = avio_rb24(pb);
728  bsmod = (eac3info >> 12) & 0x1f;
729  acmod = (eac3info >> 9) & 0x7;
730  lfeon = (eac3info >> 8) & 0x1;
731  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
732  if (lfeon)
733  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
734  st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
735  *ast = bsmod;
736  if (st->codec->channels > 1 && bsmod == 0x7)
737  *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
738 
739  st->codec->audio_service_type = *ast;
740 
741  return 0;
742 }
743 
744 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
745 {
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 (atom.size < 16)
753  return 0;
754 
755  /* skip version and flags */
756  avio_skip(pb, 4);
757 
758  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
759 
760  return 0;
761 }
762 
763 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
764 {
765  AVStream *st;
766  int ret;
767 
768  if (c->fc->nb_streams < 1)
769  return 0;
770  st = c->fc->streams[c->fc->nb_streams-1];
771 
772  if ((ret = ff_get_wav_header(pb, st->codec, atom.size, 0)) < 0)
773  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
774 
775  return ret;
776 }
777 
778 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
779 {
780  const int num = avio_rb32(pb);
781  const int den = avio_rb32(pb);
782  AVStream *st;
783 
784  if (c->fc->nb_streams < 1)
785  return 0;
786  st = c->fc->streams[c->fc->nb_streams-1];
787 
788  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
789  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
790  av_log(c->fc, AV_LOG_WARNING,
791  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
792  st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
793  num, den);
794  } else if (den != 0) {
795  av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den,
796  num, den, 32767);
797  }
798  return 0;
799 }
800 
801 /* this atom contains actual media data */
802 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
803 {
804  if (atom.size == 0) /* wrong one (MP4) */
805  return 0;
806  c->found_mdat=1;
807  return 0; /* now go for moov */
808 }
809 
810 /* read major brand, minor version and compatible brands and store them as metadata */
811 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
812 {
813  uint32_t minor_ver;
814  int comp_brand_size;
815  char* comp_brands_str;
816  uint8_t type[5] = {0};
817  int ret = ffio_read_size(pb, type, 4);
818  if (ret < 0)
819  return ret;
820 
821  if (strcmp(type, "qt "))
822  c->isom = 1;
823  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
824  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
825  minor_ver = avio_rb32(pb); /* minor version */
826  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
827 
828  comp_brand_size = atom.size - 8;
829  if (comp_brand_size < 0)
830  return AVERROR_INVALIDDATA;
831  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
832  if (!comp_brands_str)
833  return AVERROR(ENOMEM);
834 
835  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
836  if (ret < 0) {
837  av_freep(&comp_brands_str);
838  return ret;
839  }
840  comp_brands_str[comp_brand_size] = 0;
841  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
842  av_freep(&comp_brands_str);
843 
844  return 0;
845 }
846 
847 /* this atom should contain all header atoms */
848 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
849 {
850  int ret;
851 
852  if (c->found_moov) {
853  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
854  avio_skip(pb, atom.size);
855  return 0;
856  }
857 
858  if ((ret = mov_read_default(c, pb, atom)) < 0)
859  return ret;
860  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
861  /* so we don't parse the whole file if over a network */
862  c->found_moov=1;
863  return 0; /* now go for mdat */
864 }
865 
866 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
867 {
868  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
869  c->has_looked_for_mfra = 1;
870  if (pb->seekable) {
871  int ret;
872  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
873  "for a mfra\n");
874  if ((ret = mov_read_mfra(c, pb)) < 0) {
875  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
876  "read the mfra (may be a live ismv)\n");
877  }
878  } else {
879  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
880  "seekable, can not look for mfra\n");
881  }
882  }
883  c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
884  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
885  return mov_read_default(c, pb, atom);
886 }
887 
888 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
889 {
890  char buffer[32];
891  if (time) {
892  struct tm *ptm, tmbuf;
893  time_t timet;
894  if(time >= 2082844800)
895  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
896  timet = time;
897  ptm = gmtime_r(&timet, &tmbuf);
898  if (!ptm) return;
899  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
900  av_dict_set(metadata, "creation_time", buffer, 0);
901  }
902 }
903 
904 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
905 {
906  AVStream *st;
907  MOVStreamContext *sc;
908  int version;
909  char language[4] = {0};
910  unsigned lang;
911  int64_t creation_time;
912 
913  if (c->fc->nb_streams < 1)
914  return 0;
915  st = c->fc->streams[c->fc->nb_streams-1];
916  sc = st->priv_data;
917 
918  if (sc->time_scale) {
919  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
920  return AVERROR_INVALIDDATA;
921  }
922 
923  version = avio_r8(pb);
924  if (version > 1) {
925  avpriv_request_sample(c->fc, "Version %d", version);
926  return AVERROR_PATCHWELCOME;
927  }
928  avio_rb24(pb); /* flags */
929  if (version == 1) {
930  creation_time = avio_rb64(pb);
931  avio_rb64(pb);
932  } else {
933  creation_time = avio_rb32(pb);
934  avio_rb32(pb); /* modification time */
935  }
936  mov_metadata_creation_time(&st->metadata, creation_time);
937 
938  sc->time_scale = avio_rb32(pb);
939  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
940 
941  lang = avio_rb16(pb); /* language */
942  if (ff_mov_lang_to_iso639(lang, language))
943  av_dict_set(&st->metadata, "language", language, 0);
944  avio_rb16(pb); /* quality */
945 
946  return 0;
947 }
948 
949 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
950 {
951  int64_t creation_time;
952  int version = avio_r8(pb); /* version */
953  avio_rb24(pb); /* flags */
954 
955  if (version == 1) {
956  creation_time = avio_rb64(pb);
957  avio_rb64(pb);
958  } else {
959  creation_time = avio_rb32(pb);
960  avio_rb32(pb); /* modification time */
961  }
962  mov_metadata_creation_time(&c->fc->metadata, creation_time);
963  c->time_scale = avio_rb32(pb); /* time scale */
964 
965  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
966 
967  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
968  // set the AVCodecContext duration because the duration of individual tracks
969  // may be inaccurate
970  if (c->time_scale > 0 && !c->trex_data)
971  c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
972  avio_rb32(pb); /* preferred scale */
973 
974  avio_rb16(pb); /* preferred volume */
975 
976  avio_skip(pb, 10); /* reserved */
977 
978  avio_skip(pb, 36); /* display matrix */
979 
980  avio_rb32(pb); /* preview time */
981  avio_rb32(pb); /* preview duration */
982  avio_rb32(pb); /* poster time */
983  avio_rb32(pb); /* selection time */
984  avio_rb32(pb); /* selection duration */
985  avio_rb32(pb); /* current time */
986  avio_rb32(pb); /* next track ID */
987 
988  return 0;
989 }
990 
991 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
992 {
993  AVStream *st;
994  int little_endian;
995 
996  if (c->fc->nb_streams < 1)
997  return 0;
998  st = c->fc->streams[c->fc->nb_streams-1];
999 
1000  little_endian = avio_rb16(pb) & 0xFF;
1001  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1002  if (little_endian == 1) {
1003  switch (st->codec->codec_id) {
1004  case AV_CODEC_ID_PCM_S24BE:
1005  st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1006  break;
1007  case AV_CODEC_ID_PCM_S32BE:
1008  st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1009  break;
1010  case AV_CODEC_ID_PCM_F32BE:
1011  st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
1012  break;
1013  case AV_CODEC_ID_PCM_F64BE:
1014  st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
1015  break;
1016  default:
1017  break;
1018  }
1019  }
1020  return 0;
1021 }
1022 
1023 static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1024 {
1025  AVStream *st;
1026  char color_parameter_type[5] = { 0 };
1027  int color_primaries, color_trc, color_matrix;
1028  int ret;
1029 
1030  if (c->fc->nb_streams < 1)
1031  return 0;
1032  st = c->fc->streams[c->fc->nb_streams - 1];
1033 
1034  ret = ffio_read_size(pb, color_parameter_type, 4);
1035  if (ret < 0)
1036  return ret;
1037  if (strncmp(color_parameter_type, "nclx", 4) &&
1038  strncmp(color_parameter_type, "nclc", 4)) {
1039  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1040  color_parameter_type);
1041  return 0;
1042  }
1043 
1044  color_primaries = avio_rb16(pb);
1045  color_trc = avio_rb16(pb);
1046  color_matrix = avio_rb16(pb);
1047 
1048  av_log(c->fc, AV_LOG_TRACE,
1049  "%s: pri %d trc %d matrix %d",
1050  color_parameter_type, color_primaries, color_trc, color_matrix);
1051 
1052  if (!strncmp(color_parameter_type, "nclx", 4)) {
1053  uint8_t color_range = avio_r8(pb) >> 7;
1054  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1055  if (color_range)
1056  st->codec->color_range = AVCOL_RANGE_JPEG;
1057  else
1058  st->codec->color_range = AVCOL_RANGE_MPEG;
1059  /* 14496-12 references JPEG XR specs (rather than the more complete
1060  * 23001-8) so some adjusting is required */
1061  if (color_primaries >= AVCOL_PRI_FILM)
1062  color_primaries = AVCOL_PRI_UNSPECIFIED;
1063  if ((color_trc >= AVCOL_TRC_LINEAR &&
1064  color_trc <= AVCOL_TRC_LOG_SQRT) ||
1065  color_trc >= AVCOL_TRC_BT2020_10)
1066  color_trc = AVCOL_TRC_UNSPECIFIED;
1067  if (color_matrix >= AVCOL_SPC_BT2020_NCL)
1068  color_matrix = AVCOL_SPC_UNSPECIFIED;
1069  st->codec->color_primaries = color_primaries;
1070  st->codec->color_trc = color_trc;
1071  st->codec->colorspace = color_matrix;
1072  } else if (!strncmp(color_parameter_type, "nclc", 4)) {
1073  /* color primaries, Table 4-4 */
1074  switch (color_primaries) {
1075  case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
1076  case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
1077  case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
1078  }
1079  /* color transfer, Table 4-5 */
1080  switch (color_trc) {
1081  case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
1082  case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
1083  }
1084  /* color matrix, Table 4-6 */
1085  switch (color_matrix) {
1086  case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
1087  case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
1088  case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
1089  }
1090  }
1091  av_log(c->fc, AV_LOG_TRACE, "\n");
1092 
1093  return 0;
1094 }
1095 
1096 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1097 {
1098  AVStream *st;
1099  unsigned mov_field_order;
1100  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1101 
1102  if (c->fc->nb_streams < 1) // will happen with jp2 files
1103  return 0;
1104  st = c->fc->streams[c->fc->nb_streams-1];
1105  if (atom.size < 2)
1106  return AVERROR_INVALIDDATA;
1107  mov_field_order = avio_rb16(pb);
1108  if ((mov_field_order & 0xFF00) == 0x0100)
1109  decoded_field_order = AV_FIELD_PROGRESSIVE;
1110  else if ((mov_field_order & 0xFF00) == 0x0200) {
1111  switch (mov_field_order & 0xFF) {
1112  case 0x01: decoded_field_order = AV_FIELD_TT;
1113  break;
1114  case 0x06: decoded_field_order = AV_FIELD_BB;
1115  break;
1116  case 0x09: decoded_field_order = AV_FIELD_TB;
1117  break;
1118  case 0x0E: decoded_field_order = AV_FIELD_BT;
1119  break;
1120  }
1121  }
1122  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1123  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1124  }
1125  st->codec->field_order = decoded_field_order;
1126 
1127  return 0;
1128 }
1129 
1130 static int mov_realloc_extradata(AVCodecContext *codec, MOVAtom atom)
1131 {
1132  int err = 0;
1133  uint64_t size = (uint64_t)codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
1134  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1135  return AVERROR_INVALIDDATA;
1136  if ((err = av_reallocp(&codec->extradata, size)) < 0) {
1137  codec->extradata_size = 0;
1138  return err;
1139  }
1140  codec->extradata_size = size - FF_INPUT_BUFFER_PADDING_SIZE;
1141  return 0;
1142 }
1143 
1144 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1145 static int64_t mov_read_atom_into_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1146  AVCodecContext *codec, uint8_t *buf)
1147 {
1148  int64_t result = atom.size;
1149  int err;
1150 
1151  AV_WB32(buf , atom.size + 8);
1152  AV_WL32(buf + 4, atom.type);
1153  err = ffio_read_size(pb, buf + 8, atom.size);
1154  if (err < 0) {
1155  codec->extradata_size -= atom.size;
1156  return err;
1157  } else if (err < atom.size) {
1158  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1159  codec->extradata_size -= atom.size - err;
1160  result = err;
1161  }
1162  memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1163  return result;
1164 }
1165 
1166 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1167 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1168  enum AVCodecID codec_id)
1169 {
1170  AVStream *st;
1171  uint64_t original_size;
1172  int err;
1173 
1174  if (c->fc->nb_streams < 1) // will happen with jp2 files
1175  return 0;
1176  st = c->fc->streams[c->fc->nb_streams-1];
1177 
1178  if (st->codec->codec_id != codec_id)
1179  return 0; /* unexpected codec_id - don't mess with extradata */
1180 
1181  original_size = st->codec->extradata_size;
1182  err = mov_realloc_extradata(st->codec, atom);
1183  if (err)
1184  return err;
1185 
1186  err = mov_read_atom_into_extradata(c, pb, atom, st->codec, st->codec->extradata + original_size);
1187  if (err < 0)
1188  return err;
1189  return 0; // Note: this is the original behavior to ignore truncation.
1190 }
1191 
1192 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1193 static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1194 {
1195  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1196 }
1197 
1198 static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1199 {
1200  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1201 }
1202 
1203 static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1204 {
1205  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1206 }
1207 
1208 static int mov_read_dpxe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1209 {
1210  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1211 }
1212 
1213 static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1214 {
1215  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1216  if(ret == 0)
1217  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1218  return ret;
1219 }
1220 
1221 static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1222 {
1223  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1224 
1225  if (!ret && c->fc->nb_streams >= 1) {
1226  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1227  if (avctx->extradata_size >= 40) {
1228  avctx->height = AV_RB16(&avctx->extradata[36]);
1229  avctx->width = AV_RB16(&avctx->extradata[38]);
1230  }
1231  }
1232  return ret;
1233 }
1234 
1235 static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1236 {
1237  if (c->fc->nb_streams >= 1) {
1238  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1239  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1240  codec->codec_id == AV_CODEC_ID_H264 &&
1241  atom.size > 11) {
1242  avio_skip(pb, 10);
1243  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1244  if (avio_rb16(pb) == 0xd4d)
1245  codec->width = 1440;
1246  return 0;
1247  }
1248  }
1249 
1250  return mov_read_avid(c, pb, atom);
1251 }
1252 
1253 static int mov_read_aclr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1254 {
1255  int ret = 0;
1256  int length = 0;
1257  uint64_t original_size;
1258  if (c->fc->nb_streams >= 1) {
1259  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1260  if (codec->codec_id == AV_CODEC_ID_H264)
1261  return 0;
1262  if (atom.size == 16) {
1263  original_size = codec->extradata_size;
1264  ret = mov_realloc_extradata(codec, atom);
1265  if (!ret) {
1266  length = mov_read_atom_into_extradata(c, pb, atom, codec, codec->extradata + original_size);
1267  if (length == atom.size) {
1268  const uint8_t range_value = codec->extradata[original_size + 19];
1269  switch (range_value) {
1270  case 1:
1271  codec->color_range = AVCOL_RANGE_MPEG;
1272  break;
1273  case 2:
1274  codec->color_range = AVCOL_RANGE_JPEG;
1275  break;
1276  default:
1277  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1278  break;
1279  }
1280  av_dlog(c, "color_range: %d\n", codec->color_range);
1281  } else {
1282  /* For some reason the whole atom was not added to the extradata */
1283  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1284  }
1285  } else {
1286  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1287  }
1288  } else {
1289  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1290  }
1291  }
1292 
1293  return ret;
1294 }
1295 
1296 static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1297 {
1298  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1299 }
1300 
1301 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1302 {
1303  AVStream *st;
1304  int ret;
1305 
1306  if (c->fc->nb_streams < 1)
1307  return 0;
1308  st = c->fc->streams[c->fc->nb_streams-1];
1309 
1310  if ((uint64_t)atom.size > (1<<30))
1311  return AVERROR_INVALIDDATA;
1312 
1313  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1314  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1315  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1316  // pass all frma atom to codec, needed at least for QDMC and QDM2
1317  av_freep(&st->codec->extradata);
1318  ret = ff_get_extradata(st->codec, pb, atom.size);
1319  if (ret < 0)
1320  return ret;
1321  } else if (atom.size > 8) { /* to read frma, esds atoms */
1322  if ((ret = mov_read_default(c, pb, atom)) < 0)
1323  return ret;
1324  } else
1325  avio_skip(pb, atom.size);
1326  return 0;
1327 }
1328 
1329 /**
1330  * This function reads atom content and puts data in extradata without tag
1331  * nor size unlike mov_read_extradata.
1332  */
1333 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1334 {
1335  AVStream *st;
1336  int ret;
1337 
1338  if (c->fc->nb_streams < 1)
1339  return 0;
1340  st = c->fc->streams[c->fc->nb_streams-1];
1341 
1342  if ((uint64_t)atom.size > (1<<30))
1343  return AVERROR_INVALIDDATA;
1344 
1345  if (atom.size >= 10) {
1346  // Broken files created by legacy versions of libavformat will
1347  // wrap a whole fiel atom inside of a glbl atom.
1348  unsigned size = avio_rb32(pb);
1349  unsigned type = avio_rl32(pb);
1350  avio_seek(pb, -8, SEEK_CUR);
1351  if (type == MKTAG('f','i','e','l') && size == atom.size)
1352  return mov_read_default(c, pb, atom);
1353  }
1354  if (st->codec->extradata_size > 1 && st->codec->extradata) {
1355  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1356  return 0;
1357  }
1358  av_freep(&st->codec->extradata);
1359  ret = ff_get_extradata(st->codec, pb, atom.size);
1360  if (ret < 0)
1361  return ret;
1362 
1363  return 0;
1364 }
1365 
1366 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1367 {
1368  AVStream *st;
1369  uint8_t profile_level;
1370  int ret;
1371 
1372  if (c->fc->nb_streams < 1)
1373  return 0;
1374  st = c->fc->streams[c->fc->nb_streams-1];
1375 
1376  if (atom.size >= (1<<28) || atom.size < 7)
1377  return AVERROR_INVALIDDATA;
1378 
1379  profile_level = avio_r8(pb);
1380  if ((profile_level & 0xf0) != 0xc0)
1381  return 0;
1382 
1383  avio_seek(pb, 6, SEEK_CUR);
1384  av_freep(&st->codec->extradata);
1385  ret = ff_get_extradata(st->codec, pb, atom.size - 7);
1386  if (ret < 0)
1387  return ret;
1388 
1389  return 0;
1390 }
1391 
1392 /**
1393  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1394  * but can have extradata appended at the end after the 40 bytes belonging
1395  * to the struct.
1396  */
1397 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1398 {
1399  AVStream *st;
1400  int ret;
1401 
1402  if (c->fc->nb_streams < 1)
1403  return 0;
1404  if (atom.size <= 40)
1405  return 0;
1406  st = c->fc->streams[c->fc->nb_streams-1];
1407 
1408  if ((uint64_t)atom.size > (1<<30))
1409  return AVERROR_INVALIDDATA;
1410 
1411  avio_skip(pb, 40);
1412  av_freep(&st->codec->extradata);
1413  ret = ff_get_extradata(st->codec, pb, atom.size - 40);
1414  if (ret < 0)
1415  return ret;
1416 
1417  return 0;
1418 }
1419 
1420 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1421 {
1422  AVStream *st;
1423  MOVStreamContext *sc;
1424  unsigned int i, entries;
1425 
1426  if (c->fc->nb_streams < 1)
1427  return 0;
1428  st = c->fc->streams[c->fc->nb_streams-1];
1429  sc = st->priv_data;
1430 
1431  avio_r8(pb); /* version */
1432  avio_rb24(pb); /* flags */
1433 
1434  entries = avio_rb32(pb);
1435 
1436  if (!entries)
1437  return 0;
1438 
1439  if (sc->chunk_offsets)
1440  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1441  av_free(sc->chunk_offsets);
1442  sc->chunk_count = 0;
1443  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1444  if (!sc->chunk_offsets)
1445  return AVERROR(ENOMEM);
1446  sc->chunk_count = entries;
1447 
1448  if (atom.type == MKTAG('s','t','c','o'))
1449  for (i = 0; i < entries && !pb->eof_reached; i++)
1450  sc->chunk_offsets[i] = avio_rb32(pb);
1451  else if (atom.type == MKTAG('c','o','6','4'))
1452  for (i = 0; i < entries && !pb->eof_reached; i++)
1453  sc->chunk_offsets[i] = avio_rb64(pb);
1454  else
1455  return AVERROR_INVALIDDATA;
1456 
1457  sc->chunk_count = i;
1458 
1459  if (pb->eof_reached)
1460  return AVERROR_EOF;
1461 
1462  return 0;
1463 }
1464 
1465 /**
1466  * Compute codec id for 'lpcm' tag.
1467  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1468  */
1469 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1470 {
1471  /* lpcm flags:
1472  * 0x1 = float
1473  * 0x2 = big-endian
1474  * 0x4 = signed
1475  */
1476  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1477 }
1478 
1479 static int mov_codec_id(AVStream *st, uint32_t format)
1480 {
1481  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1482 
1483  if (id <= 0 &&
1484  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1485  (format & 0xFFFF) == 'T' + ('S' << 8)))
1486  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1487 
1488  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1489  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1490  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1491  /* skip old asf mpeg4 tag */
1492  format && format != MKTAG('m','p','4','s')) {
1493  id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1494  if (id <= 0)
1495  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1496  if (id > 0)
1497  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1498  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1499  (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1500  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1501  id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1502  if (id > 0)
1503  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1504  }
1505  }
1506 
1507  st->codec->codec_tag = format;
1508 
1509  return id;
1510 }
1511 
1512 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1513  AVStream *st, MOVStreamContext *sc)
1514 {
1515  uint8_t codec_name[32];
1516  unsigned int color_depth, len, j;
1517  int color_greyscale;
1518  int color_table_id;
1519 
1520  avio_rb16(pb); /* version */
1521  avio_rb16(pb); /* revision level */
1522  avio_rb32(pb); /* vendor */
1523  avio_rb32(pb); /* temporal quality */
1524  avio_rb32(pb); /* spatial quality */
1525 
1526  st->codec->width = avio_rb16(pb); /* width */
1527  st->codec->height = avio_rb16(pb); /* height */
1528 
1529  avio_rb32(pb); /* horiz resolution */
1530  avio_rb32(pb); /* vert resolution */
1531  avio_rb32(pb); /* data size, always 0 */
1532  avio_rb16(pb); /* frames per samples */
1533 
1534  len = avio_r8(pb); /* codec name, pascal string */
1535  if (len > 31)
1536  len = 31;
1537  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1538  if (len < 31)
1539  avio_skip(pb, 31 - len);
1540 
1541  if (codec_name[0])
1542  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1543 
1544  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1545  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1546  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1547  st->codec->width &= ~1;
1548  st->codec->height &= ~1;
1549  }
1550  /* Flash Media Server uses tag H263 with Sorenson Spark */
1551  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1552  !memcmp(codec_name, "Sorenson H263", 13))
1553  st->codec->codec_id = AV_CODEC_ID_FLV1;
1554 
1555  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1556  color_table_id = avio_rb16(pb); /* colortable id */
1557  av_log(c->fc, AV_LOG_TRACE, "depth %d, ctab id %d\n",
1558  st->codec->bits_per_coded_sample, color_table_id);
1559  /* figure out the palette situation */
1560  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1561  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1562  /* Do not create a greyscale palette for cinepak */
1563  if (color_greyscale && st->codec->codec_id == AV_CODEC_ID_CINEPAK)
1564  return;
1565 
1566  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1567  if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1568  /* for palette traversal */
1569  unsigned int color_start, color_count, color_end;
1570  unsigned char a, r, g, b;
1571 
1572  if (color_greyscale) {
1573  int color_index, color_dec;
1574  /* compute the greyscale palette */
1575  st->codec->bits_per_coded_sample = color_depth;
1576  color_count = 1 << color_depth;
1577  color_index = 255;
1578  color_dec = 256 / (color_count - 1);
1579  for (j = 0; j < color_count; j++) {
1580  r = g = b = color_index;
1581  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1582  color_index -= color_dec;
1583  if (color_index < 0)
1584  color_index = 0;
1585  }
1586  } else if (color_table_id) {
1587  const uint8_t *color_table;
1588  /* if flag bit 3 is set, use the default palette */
1589  color_count = 1 << color_depth;
1590  if (color_depth == 2)
1591  color_table = ff_qt_default_palette_4;
1592  else if (color_depth == 4)
1593  color_table = ff_qt_default_palette_16;
1594  else
1595  color_table = ff_qt_default_palette_256;
1596 
1597  for (j = 0; j < color_count; j++) {
1598  r = color_table[j * 3 + 0];
1599  g = color_table[j * 3 + 1];
1600  b = color_table[j * 3 + 2];
1601  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1602  }
1603  } else {
1604  /* load the palette from the file */
1605  color_start = avio_rb32(pb);
1606  color_count = avio_rb16(pb);
1607  color_end = avio_rb16(pb);
1608  if ((color_start <= 255) && (color_end <= 255)) {
1609  for (j = color_start; j <= color_end; j++) {
1610  /* each A, R, G, or B component is 16 bits;
1611  * only use the top 8 bits */
1612  a = avio_r8(pb);
1613  avio_r8(pb);
1614  r = avio_r8(pb);
1615  avio_r8(pb);
1616  g = avio_r8(pb);
1617  avio_r8(pb);
1618  b = avio_r8(pb);
1619  avio_r8(pb);
1620  sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1621  }
1622  }
1623  }
1624  sc->has_palette = 1;
1625  }
1626 }
1627 
1628 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1629  AVStream *st, MOVStreamContext *sc)
1630 {
1631  int bits_per_sample, flags;
1632  uint16_t version = avio_rb16(pb);
1633  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1634 
1635  avio_rb16(pb); /* revision level */
1636  avio_rb32(pb); /* vendor */
1637 
1638  st->codec->channels = avio_rb16(pb); /* channel count */
1639  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1640  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codec->channels);
1641 
1642  sc->audio_cid = avio_rb16(pb);
1643  avio_rb16(pb); /* packet size = 0 */
1644 
1645  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1646 
1647  // Read QT version 1 fields. In version 0 these do not exist.
1648  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1649  if (!c->isom ||
1650  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1651 
1652  if (version == 1) {
1653  sc->samples_per_frame = avio_rb32(pb);
1654  avio_rb32(pb); /* bytes per packet */
1655  sc->bytes_per_frame = avio_rb32(pb);
1656  avio_rb32(pb); /* bytes per sample */
1657  } else if (version == 2) {
1658  avio_rb32(pb); /* sizeof struct only */
1659  st->codec->sample_rate = av_int2double(avio_rb64(pb));
1660  st->codec->channels = avio_rb32(pb);
1661  avio_rb32(pb); /* always 0x7F000000 */
1662  st->codec->bits_per_coded_sample = avio_rb32(pb);
1663 
1664  flags = avio_rb32(pb); /* lpcm format specific flag */
1665  sc->bytes_per_frame = avio_rb32(pb);
1666  sc->samples_per_frame = avio_rb32(pb);
1667  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1668  st->codec->codec_id =
1669  ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
1670  flags);
1671  }
1672  }
1673 
1674  switch (st->codec->codec_id) {
1675  case AV_CODEC_ID_PCM_S8:
1676  case AV_CODEC_ID_PCM_U8:
1677  if (st->codec->bits_per_coded_sample == 16)
1678  st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1679  break;
1680  case AV_CODEC_ID_PCM_S16LE:
1681  case AV_CODEC_ID_PCM_S16BE:
1682  if (st->codec->bits_per_coded_sample == 8)
1683  st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1684  else if (st->codec->bits_per_coded_sample == 24)
1685  st->codec->codec_id =
1686  st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1687  AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1688  else if (st->codec->bits_per_coded_sample == 32)
1689  st->codec->codec_id =
1690  st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1691  AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
1692  break;
1693  /* set values for old format before stsd version 1 appeared */
1694  case AV_CODEC_ID_MACE3:
1695  sc->samples_per_frame = 6;
1696  sc->bytes_per_frame = 2 * st->codec->channels;
1697  break;
1698  case AV_CODEC_ID_MACE6:
1699  sc->samples_per_frame = 6;
1700  sc->bytes_per_frame = 1 * st->codec->channels;
1701  break;
1702  case AV_CODEC_ID_ADPCM_IMA_QT:
1703  sc->samples_per_frame = 64;
1704  sc->bytes_per_frame = 34 * st->codec->channels;
1705  break;
1706  case AV_CODEC_ID_GSM:
1707  sc->samples_per_frame = 160;
1708  sc->bytes_per_frame = 33;
1709  break;
1710  default:
1711  break;
1712  }
1713 
1714  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1715  if (bits_per_sample) {
1716  st->codec->bits_per_coded_sample = bits_per_sample;
1717  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1718  }
1719 }
1720 
1721 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
1722  AVStream *st, MOVStreamContext *sc,
1723  int64_t size)
1724 {
1725  // ttxt stsd contains display flags, justification, background
1726  // color, fonts, and default styles, so fake an atom to read it
1727  MOVAtom fake_atom = { .size = size };
1728  // mp4s contains a regular esds atom
1729  if (st->codec->codec_tag != AV_RL32("mp4s"))
1730  mov_read_glbl(c, pb, fake_atom);
1731  st->codec->width = sc->width;
1732  st->codec->height = sc->height;
1733 }
1734 
1735 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1736 {
1737  uint8_t r, g, b;
1738  int y, cb, cr;
1739 
1740  y = (ycbcr >> 16) & 0xFF;
1741  cr = (ycbcr >> 8) & 0xFF;
1742  cb = ycbcr & 0xFF;
1743 
1744  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
1745  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
1746  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
1747 
1748  return (r << 16) | (g << 8) | b;
1749 }
1750 
1751 static int mov_rewrite_dvd_sub_extradata(AVStream *st)
1752 {
1753  char buf[256] = {0};
1754  uint8_t *src = st->codec->extradata;
1755  int i;
1756 
1757  if (st->codec->extradata_size != 64)
1758  return 0;
1759 
1760  if (st->codec->width > 0 && st->codec->height > 0)
1761  snprintf(buf, sizeof(buf), "size: %dx%d\n",
1762  st->codec->width, st->codec->height);
1763  av_strlcat(buf, "palette: ", sizeof(buf));
1764 
1765  for (i = 0; i < 16; i++) {
1766  uint32_t yuv = AV_RB32(src + i * 4);
1767  uint32_t rgba = yuv_to_rgba(yuv);
1768 
1769  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1770  }
1771 
1772  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1773  return 0;
1774 
1775  av_freep(&st->codec->extradata);
1776  st->codec->extradata_size = 0;
1777  st->codec->extradata = av_mallocz(strlen(buf) + FF_INPUT_BUFFER_PADDING_SIZE);
1778  if (!st->codec->extradata)
1779  return AVERROR(ENOMEM);
1780  st->codec->extradata_size = strlen(buf);
1781  memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1782 
1783  return 0;
1784 }
1785 
1786 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
1787  AVStream *st, MOVStreamContext *sc,
1788  int64_t size)
1789 {
1790  int ret;
1791 
1792  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1793  if ((int)size != size)
1794  return AVERROR(ENOMEM);
1795 
1796  ret = ff_get_extradata(st->codec, pb, size);
1797  if (ret < 0)
1798  return ret;
1799  if (size > 16) {
1800  MOVStreamContext *tmcd_ctx = st->priv_data;
1801  int val;
1802  val = AV_RB32(st->codec->extradata + 4);
1803  tmcd_ctx->tmcd_flags = val;
1804  if (val & 1)
1805  st->codec->flags2 |= CODEC_FLAG2_DROP_FRAME_TIMECODE;
1806  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1807  st->codec->time_base.num = 1;
1808  /* adjust for per frame dur in counter mode */
1809  if (tmcd_ctx->tmcd_flags & 0x0008) {
1810  int timescale = AV_RB32(st->codec->extradata + 8);
1811  int framedur = AV_RB32(st->codec->extradata + 12);
1812  st->codec->time_base.den *= timescale;
1813  st->codec->time_base.num *= framedur;
1814  }
1815  if (size > 30) {
1816  uint32_t len = AV_RB32(st->codec->extradata + 18); /* name atom length */
1817  uint32_t format = AV_RB32(st->codec->extradata + 22);
1818  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
1819  uint16_t str_size = AV_RB16(st->codec->extradata + 26); /* string length */
1820  if (str_size > 0 && size >= (int)str_size + 26) {
1821  char *reel_name = av_malloc(str_size + 1);
1822  if (!reel_name)
1823  return AVERROR(ENOMEM);
1824  memcpy(reel_name, st->codec->extradata + 30, str_size);
1825  reel_name[str_size] = 0; /* Add null terminator */
1826  /* don't add reel_name if emtpy string */
1827  if (*reel_name == 0) {
1828  av_free(reel_name);
1829  } else {
1830  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
1831  }
1832  }
1833  }
1834  }
1835  }
1836  } else {
1837  /* other codec type, just skip (rtp, mp4s ...) */
1838  avio_skip(pb, size);
1839  }
1840  return 0;
1841 }
1842 
1843 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
1844  AVStream *st, MOVStreamContext *sc)
1845 {
1846  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1847  !st->codec->sample_rate && sc->time_scale > 1)
1848  st->codec->sample_rate = sc->time_scale;
1849 
1850  /* special codec parameters handling */
1851  switch (st->codec->codec_id) {
1852 #if CONFIG_DV_DEMUXER
1853  case AV_CODEC_ID_DVAUDIO:
1854  c->dv_fctx = avformat_alloc_context();
1855  if (!c->dv_fctx) {
1856  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
1857  return AVERROR(ENOMEM);
1858  }
1859  c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1860  if (!c->dv_demux) {
1861  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1862  return AVERROR(ENOMEM);
1863  }
1864  sc->dv_audio_container = 1;
1865  st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1866  break;
1867 #endif
1868  /* no ifdef since parameters are always those */
1869  case AV_CODEC_ID_QCELP:
1870  st->codec->channels = 1;
1871  // force sample rate for qcelp when not stored in mov
1872  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1873  st->codec->sample_rate = 8000;
1874  // FIXME: Why is the following needed for some files?
1875  sc->samples_per_frame = 160;
1876  if (!sc->bytes_per_frame)
1877  sc->bytes_per_frame = 35;
1878  break;
1879  case AV_CODEC_ID_AMR_NB:
1880  st->codec->channels = 1;
1881  /* force sample rate for amr, stsd in 3gp does not store sample rate */
1882  st->codec->sample_rate = 8000;
1883  break;
1884  case AV_CODEC_ID_AMR_WB:
1885  st->codec->channels = 1;
1886  st->codec->sample_rate = 16000;
1887  break;
1888  case AV_CODEC_ID_MP2:
1889  case AV_CODEC_ID_MP3:
1890  /* force type after stsd for m1a hdlr */
1891  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1892  st->need_parsing = AVSTREAM_PARSE_FULL;
1893  break;
1894  case AV_CODEC_ID_GSM:
1895  case AV_CODEC_ID_ADPCM_MS:
1896  case AV_CODEC_ID_ADPCM_IMA_WAV:
1897  case AV_CODEC_ID_ILBC:
1898  case AV_CODEC_ID_MACE3:
1899  case AV_CODEC_ID_MACE6:
1900  case AV_CODEC_ID_QDM2:
1901  st->codec->block_align = sc->bytes_per_frame;
1902  break;
1903  case AV_CODEC_ID_ALAC:
1904  if (st->codec->extradata_size == 36) {
1905  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1906  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1907  }
1908  break;
1909  case AV_CODEC_ID_AC3:
1910  case AV_CODEC_ID_EAC3:
1911  case AV_CODEC_ID_MPEG1VIDEO:
1912  case AV_CODEC_ID_VC1:
1913  st->need_parsing = AVSTREAM_PARSE_FULL;
1914  break;
1915  default:
1916  break;
1917  }
1918  return 0;
1919 }
1920 
1921 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
1922  int codec_tag, int format,
1923  int64_t size)
1924 {
1925  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1926 
1927  if (codec_tag &&
1928  (codec_tag != format &&
1929  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1930  : codec_tag != MKTAG('j','p','e','g')))) {
1931  /* Multiple fourcc, we skip JPEG. This is not correct, we should
1932  * export it as a separate AVStream but this needs a few changes
1933  * in the MOV demuxer, patch welcome. */
1934 
1935  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1936  avio_skip(pb, size);
1937  return 1;
1938  }
1939  if ( codec_tag == AV_RL32("avc1") ||
1940  codec_tag == AV_RL32("hvc1") ||
1941  codec_tag == AV_RL32("hev1")
1942  )
1943  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
1944 
1945  return 0;
1946 }
1947 
1948 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1949 {
1950  AVStream *st;
1951  MOVStreamContext *sc;
1952  int pseudo_stream_id;
1953 
1954  if (c->fc->nb_streams < 1)
1955  return 0;
1956  st = c->fc->streams[c->fc->nb_streams-1];
1957  sc = st->priv_data;
1958 
1959  for (pseudo_stream_id = 0;
1960  pseudo_stream_id < entries && !pb->eof_reached;
1961  pseudo_stream_id++) {
1962  //Parsing Sample description table
1963  enum AVCodecID id;
1964  int ret, dref_id = 1;
1965  MOVAtom a = { AV_RL32("stsd") };
1966  int64_t start_pos = avio_tell(pb);
1967  int64_t size = avio_rb32(pb); /* size */
1968  uint32_t format = avio_rl32(pb); /* data format */
1969 
1970  if (size >= 16) {
1971  avio_rb32(pb); /* reserved */
1972  avio_rb16(pb); /* reserved */
1973  dref_id = avio_rb16(pb);
1974  }else if (size <= 7){
1975  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1976  return AVERROR_INVALIDDATA;
1977  }
1978 
1979  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1980  size - (avio_tell(pb) - start_pos)))
1981  continue;
1982 
1983  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1984  sc->dref_id= dref_id;
1985 
1986  id = mov_codec_id(st, format);
1987 
1988  av_log(c->fc, AV_LOG_TRACE, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1989  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1990  (format >> 24) & 0xff, st->codec->codec_type);
1991 
1992  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1993  st->codec->codec_id = id;
1994  mov_parse_stsd_video(c, pb, st, sc);
1995  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1996  st->codec->codec_id = id;
1997  mov_parse_stsd_audio(c, pb, st, sc);
1998  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1999  st->codec->codec_id = id;
2000  mov_parse_stsd_subtitle(c, pb, st, sc,
2001  size - (avio_tell(pb) - start_pos));
2002  } else {
2003  ret = mov_parse_stsd_data(c, pb, st, sc,
2004  size - (avio_tell(pb) - start_pos));
2005  if (ret < 0)
2006  return ret;
2007  }
2008  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2009  a.size = size - (avio_tell(pb) - start_pos);
2010  if (a.size > 8) {
2011  if ((ret = mov_read_default(c, pb, a)) < 0)
2012  return ret;
2013  } else if (a.size > 0)
2014  avio_skip(pb, a.size);
2015  }
2016 
2017  if (pb->eof_reached)
2018  return AVERROR_EOF;
2019 
2020  return mov_finalize_stsd_codec(c, pb, st, sc);
2021 }
2022 
2023 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2024 {
2025  int entries;
2026 
2027  avio_r8(pb); /* version */
2028  avio_rb24(pb); /* flags */
2029  entries = avio_rb32(pb);
2030 
2031  return ff_mov_read_stsd_entries(c, pb, entries);
2032 }
2033 
2034 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2035 {
2036  AVStream *st;
2037  MOVStreamContext *sc;
2038  unsigned int i, entries;
2039 
2040  if (c->fc->nb_streams < 1)
2041  return 0;
2042  st = c->fc->streams[c->fc->nb_streams-1];
2043  sc = st->priv_data;
2044 
2045  avio_r8(pb); /* version */
2046  avio_rb24(pb); /* flags */
2047 
2048  entries = avio_rb32(pb);
2049 
2050  av_log(c->fc, AV_LOG_TRACE, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
2051 
2052  if (!entries)
2053  return 0;
2054  if (sc->stsc_data)
2055  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2056  av_free(sc->stsc_data);
2057  sc->stsc_count = 0;
2058  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2059  if (!sc->stsc_data)
2060  return AVERROR(ENOMEM);
2061 
2062  for (i = 0; i < entries && !pb->eof_reached; i++) {
2063  sc->stsc_data[i].first = avio_rb32(pb);
2064  sc->stsc_data[i].count = avio_rb32(pb);
2065  sc->stsc_data[i].id = avio_rb32(pb);
2066  }
2067 
2068  sc->stsc_count = i;
2069 
2070  if (pb->eof_reached)
2071  return AVERROR_EOF;
2072 
2073  return 0;
2074 }
2075 
2076 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2077 {
2078  AVStream *st;
2079  MOVStreamContext *sc;
2080  unsigned i, entries;
2081 
2082  if (c->fc->nb_streams < 1)
2083  return 0;
2084  st = c->fc->streams[c->fc->nb_streams-1];
2085  sc = st->priv_data;
2086 
2087  avio_rb32(pb); // version + flags
2088 
2089  entries = avio_rb32(pb);
2090  if (sc->stps_data)
2091  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2092  av_free(sc->stps_data);
2093  sc->stps_count = 0;
2094  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2095  if (!sc->stps_data)
2096  return AVERROR(ENOMEM);
2097 
2098  for (i = 0; i < entries && !pb->eof_reached; i++) {
2099  sc->stps_data[i] = avio_rb32(pb);
2100  //av_log(c->fc, AV_LOG_TRACE, "stps %d\n", sc->stps_data[i]);
2101  }
2102 
2103  sc->stps_count = i;
2104 
2105  if (pb->eof_reached)
2106  return AVERROR_EOF;
2107 
2108  return 0;
2109 }
2110 
2111 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2112 {
2113  AVStream *st;
2114  MOVStreamContext *sc;
2115  unsigned int i, entries;
2116 
2117  if (c->fc->nb_streams < 1)
2118  return 0;
2119  st = c->fc->streams[c->fc->nb_streams-1];
2120  sc = st->priv_data;
2121 
2122  avio_r8(pb); /* version */
2123  avio_rb24(pb); /* flags */
2124 
2125  entries = avio_rb32(pb);
2126 
2127  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %d\n", entries);
2128 
2129  if (!entries)
2130  {
2131  sc->keyframe_absent = 1;
2132  if (!st->need_parsing && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2133  st->need_parsing = AVSTREAM_PARSE_HEADERS;
2134  return 0;
2135  }
2136  if (sc->keyframes)
2137  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2138  if (entries >= UINT_MAX / sizeof(int))
2139  return AVERROR_INVALIDDATA;
2140  av_freep(&sc->keyframes);
2141  sc->keyframe_count = 0;
2142  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2143  if (!sc->keyframes)
2144  return AVERROR(ENOMEM);
2145 
2146  for (i = 0; i < entries && !pb->eof_reached; i++) {
2147  sc->keyframes[i] = avio_rb32(pb);
2148  //av_log(c->fc, AV_LOG_TRACE, "keyframes[]=%d\n", sc->keyframes[i]);
2149  }
2150 
2151  sc->keyframe_count = i;
2152 
2153  if (pb->eof_reached)
2154  return AVERROR_EOF;
2155 
2156  return 0;
2157 }
2158 
2159 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2160 {
2161  AVStream *st;
2162  MOVStreamContext *sc;
2163  unsigned int i, entries, sample_size, field_size, num_bytes;
2164  GetBitContext gb;
2165  unsigned char* buf;
2166  int ret;
2167 
2168  if (c->fc->nb_streams < 1)
2169  return 0;
2170  st = c->fc->streams[c->fc->nb_streams-1];
2171  sc = st->priv_data;
2172 
2173  avio_r8(pb); /* version */
2174  avio_rb24(pb); /* flags */
2175 
2176  if (atom.type == MKTAG('s','t','s','z')) {
2177  sample_size = avio_rb32(pb);
2178  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2179  sc->sample_size = sample_size;
2180  sc->stsz_sample_size = sample_size;
2181  field_size = 32;
2182  } else {
2183  sample_size = 0;
2184  avio_rb24(pb); /* reserved */
2185  field_size = avio_r8(pb);
2186  }
2187  entries = avio_rb32(pb);
2188 
2189  av_log(c->fc, AV_LOG_TRACE, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2190 
2191  sc->sample_count = entries;
2192  if (sample_size)
2193  return 0;
2194 
2195  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2196  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2197  return AVERROR_INVALIDDATA;
2198  }
2199 
2200  if (!entries)
2201  return 0;
2202  if (entries >= (UINT_MAX - 4) / field_size)
2203  return AVERROR_INVALIDDATA;
2204  if (sc->sample_sizes)
2205  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2206  av_free(sc->sample_sizes);
2207  sc->sample_count = 0;
2208  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2209  if (!sc->sample_sizes)
2210  return AVERROR(ENOMEM);
2211 
2212  num_bytes = (entries*field_size+4)>>3;
2213 
2214  buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
2215  if (!buf) {
2216  av_freep(&sc->sample_sizes);
2217  return AVERROR(ENOMEM);
2218  }
2219 
2220  ret = ffio_read_size(pb, buf, num_bytes);
2221  if (ret < 0) {
2222  av_freep(&sc->sample_sizes);
2223  av_free(buf);
2224  return ret;
2225  }
2226 
2227  init_get_bits(&gb, buf, 8*num_bytes);
2228 
2229  for (i = 0; i < entries && !pb->eof_reached; i++) {
2230  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2231  sc->data_size += sc->sample_sizes[i];
2232  }
2233 
2234  sc->sample_count = i;
2235 
2236  av_free(buf);
2237 
2238  if (pb->eof_reached)
2239  return AVERROR_EOF;
2240 
2241  return 0;
2242 }
2243 
2244 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2245 {
2246  AVStream *st;
2247  MOVStreamContext *sc;
2248  unsigned int i, entries;
2249  int64_t duration=0;
2250  int64_t total_sample_count=0;
2251 
2252  if (c->fc->nb_streams < 1)
2253  return 0;
2254  st = c->fc->streams[c->fc->nb_streams-1];
2255  sc = st->priv_data;
2256 
2257  avio_r8(pb); /* version */
2258  avio_rb24(pb); /* flags */
2259  entries = avio_rb32(pb);
2260 
2261  av_log(c->fc, AV_LOG_TRACE, "track[%i].stts.entries = %i\n",
2262  c->fc->nb_streams-1, entries);
2263 
2264  if (sc->stts_data)
2265  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2266  av_free(sc->stts_data);
2267  sc->stts_count = 0;
2268  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2269  if (!sc->stts_data)
2270  return AVERROR(ENOMEM);
2271 
2272  for (i = 0; i < entries && !pb->eof_reached; i++) {
2273  int sample_duration;
2274  int sample_count;
2275 
2276  sample_count=avio_rb32(pb);
2277  sample_duration = avio_rb32(pb);
2278 
2279  if (sample_count < 0) {
2280  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2281  return AVERROR_INVALIDDATA;
2282  }
2283  sc->stts_data[i].count= sample_count;
2284  sc->stts_data[i].duration= sample_duration;
2285 
2286  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2287  sample_count, sample_duration);
2288 
2289  if ( i+1 == entries
2290  && i
2291  && sample_count == 1
2292  && total_sample_count > 100
2293  && sample_duration/10 > duration / total_sample_count)
2294  sample_duration = duration / total_sample_count;
2295  duration+=(int64_t)sample_duration*sample_count;
2296  total_sample_count+=sample_count;
2297  }
2298 
2299  sc->stts_count = i;
2300 
2301  sc->duration_for_fps += duration;
2302  sc->nb_frames_for_fps += total_sample_count;
2303 
2304  if (pb->eof_reached)
2305  return AVERROR_EOF;
2306 
2307  st->nb_frames= total_sample_count;
2308  if (duration)
2309  st->duration= duration;
2310  sc->track_end = duration;
2311  return 0;
2312 }
2313 
2314 static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
2315 {
2316  if (duration < 0) {
2317  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2318  }
2319 }
2320 
2321 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2322 {
2323  AVStream *st;
2324  MOVStreamContext *sc;
2325  unsigned int i, entries;
2326 
2327  if (c->fc->nb_streams < 1)
2328  return 0;
2329  st = c->fc->streams[c->fc->nb_streams-1];
2330  sc = st->priv_data;
2331 
2332  avio_r8(pb); /* version */
2333  avio_rb24(pb); /* flags */
2334  entries = avio_rb32(pb);
2335 
2336  av_log(c->fc, AV_LOG_TRACE, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2337 
2338  if (!entries)
2339  return 0;
2340  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2341  return AVERROR_INVALIDDATA;
2342  av_freep(&sc->ctts_data);
2343  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2344  if (!sc->ctts_data)
2345  return AVERROR(ENOMEM);
2346 
2347  for (i = 0; i < entries && !pb->eof_reached; i++) {
2348  int count =avio_rb32(pb);
2349  int duration =avio_rb32(pb);
2350 
2351  sc->ctts_data[i].count = count;
2352  sc->ctts_data[i].duration= duration;
2353 
2354  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2355  count, duration);
2356 
2357  if (FFABS(duration) > (1<<28) && i+2<entries) {
2358  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2359  av_freep(&sc->ctts_data);
2360  sc->ctts_count = 0;
2361  return 0;
2362  }
2363 
2364  if (i+2<entries)
2365  mov_update_dts_shift(sc, duration);
2366  }
2367 
2368  sc->ctts_count = i;
2369 
2370  if (pb->eof_reached)
2371  return AVERROR_EOF;
2372 
2373  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2374 
2375  return 0;
2376 }
2377 
2378 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2379 {
2380  AVStream *st;
2381  MOVStreamContext *sc;
2382  unsigned int i, entries;
2383  uint8_t version;
2384  uint32_t grouping_type;
2385 
2386  if (c->fc->nb_streams < 1)
2387  return 0;
2388  st = c->fc->streams[c->fc->nb_streams-1];
2389  sc = st->priv_data;
2390 
2391  version = avio_r8(pb); /* version */
2392  avio_rb24(pb); /* flags */
2393  grouping_type = avio_rl32(pb);
2394  if (grouping_type != MKTAG( 'r','a','p',' '))
2395  return 0; /* only support 'rap ' grouping */
2396  if (version == 1)
2397  avio_rb32(pb); /* grouping_type_parameter */
2398 
2399  entries = avio_rb32(pb);
2400  if (!entries)
2401  return 0;
2402  if (sc->rap_group)
2403  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2404  av_free(sc->rap_group);
2405  sc->rap_group_count = 0;
2406  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2407  if (!sc->rap_group)
2408  return AVERROR(ENOMEM);
2409 
2410  for (i = 0; i < entries && !pb->eof_reached; i++) {
2411  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2412  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2413  }
2414 
2415  sc->rap_group_count = i;
2416 
2417  return pb->eof_reached ? AVERROR_EOF : 0;
2418 }
2419 
2420 static void mov_build_index(MOVContext *mov, AVStream *st)
2421 {
2422  MOVStreamContext *sc = st->priv_data;
2423  int64_t current_offset;
2424  int64_t current_dts = 0;
2425  unsigned int stts_index = 0;
2426  unsigned int stsc_index = 0;
2427  unsigned int stss_index = 0;
2428  unsigned int stps_index = 0;
2429  unsigned int i, j;
2430  uint64_t stream_size = 0;
2431 
2432  if (sc->elst_count) {
2433  int i, edit_start_index = 0, unsupported = 0;
2434  int64_t empty_duration = 0; // empty duration of the first edit list entry
2435  int64_t start_time = 0; // start time of the media
2436 
2437  for (i = 0; i < sc->elst_count; i++) {
2438  const MOVElst *e = &sc->elst_data[i];
2439  if (i == 0 && e->time == -1) {
2440  /* if empty, the first entry is the start time of the stream
2441  * relative to the presentation itself */
2442  empty_duration = e->duration;
2443  edit_start_index = 1;
2444  } else if (i == edit_start_index && e->time >= 0) {
2445  start_time = e->time;
2446  } else
2447  unsupported = 1;
2448  }
2449  if (unsupported)
2450  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
2451  "a/v desync might occur, patch welcome\n");
2452 
2453  /* adjust first dts according to edit list */
2454  if ((empty_duration || start_time) && mov->time_scale > 0) {
2455  if (empty_duration)
2456  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
2457  sc->time_offset = start_time - empty_duration;
2458  current_dts = -sc->time_offset;
2459  if (sc->ctts_count>0 && sc->stts_count>0 &&
2460  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2461  /* more than 16 frames delay, dts are likely wrong
2462  this happens with files created by iMovie */
2463  sc->wrong_dts = 1;
2464  st->codec->has_b_frames = 1;
2465  }
2466  }
2467  }
2468 
2469  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2470  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2471  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2472  unsigned int current_sample = 0;
2473  unsigned int stts_sample = 0;
2474  unsigned int sample_size;
2475  unsigned int distance = 0;
2476  unsigned int rap_group_index = 0;
2477  unsigned int rap_group_sample = 0;
2478  int64_t last_dts = 0;
2479  int64_t dts_correction = 0;
2480  int rap_group_present = sc->rap_group_count && sc->rap_group;
2481  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2482 
2483  current_dts -= sc->dts_shift;
2484  last_dts = current_dts;
2485 
2486  if (!sc->sample_count || st->nb_index_entries)
2487  return;
2488  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2489  return;
2490  if (av_reallocp_array(&st->index_entries,
2491  st->nb_index_entries + sc->sample_count,
2492  sizeof(*st->index_entries)) < 0) {
2493  st->nb_index_entries = 0;
2494  return;
2495  }
2496  st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
2497 
2498  for (i = 0; i < sc->chunk_count; i++) {
2499  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2500  current_offset = sc->chunk_offsets[i];
2501  while (stsc_index + 1 < sc->stsc_count &&
2502  i + 1 == sc->stsc_data[stsc_index + 1].first)
2503  stsc_index++;
2504 
2505  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2506  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2507  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2508  sc->stsz_sample_size = sc->sample_size;
2509  }
2510  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2511  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2512  sc->stsz_sample_size = sc->sample_size;
2513  }
2514 
2515  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2516  int keyframe = 0;
2517  if (current_sample >= sc->sample_count) {
2518  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2519  return;
2520  }
2521 
2522  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2523  keyframe = 1;
2524  if (stss_index + 1 < sc->keyframe_count)
2525  stss_index++;
2526  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2527  keyframe = 1;
2528  if (stps_index + 1 < sc->stps_count)
2529  stps_index++;
2530  }
2531  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2532  if (sc->rap_group[rap_group_index].index > 0)
2533  keyframe = 1;
2534  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2535  rap_group_sample = 0;
2536  rap_group_index++;
2537  }
2538  }
2539  if (sc->keyframe_absent
2540  && !sc->stps_count
2541  && !rap_group_present
2542  && (st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2543  keyframe = 1;
2544  if (keyframe)
2545  distance = 0;
2546  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2547  if (sc->pseudo_stream_id == -1 ||
2548  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2549  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2550  e->pos = current_offset;
2551  e->timestamp = current_dts;
2552  e->size = sample_size;
2553  e->min_distance = distance;
2554  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2555  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2556  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2557  current_offset, current_dts, sample_size, distance, keyframe);
2558  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2559  ff_rfps_add_frame(mov->fc, st, current_dts);
2560  }
2561 
2562  current_offset += sample_size;
2563  stream_size += sample_size;
2564 
2565  /* A negative sample duration is invalid based on the spec,
2566  * but some samples need it to correct the DTS. */
2567  if (sc->stts_data[stts_index].duration < 0) {
2568  av_log(mov->fc, AV_LOG_WARNING,
2569  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
2570  sc->stts_data[stts_index].duration, stts_index,
2571  st->index);
2572  dts_correction += sc->stts_data[stts_index].duration - 1;
2573  sc->stts_data[stts_index].duration = 1;
2574  }
2575  current_dts += sc->stts_data[stts_index].duration;
2576  if (!dts_correction || current_dts + dts_correction > last_dts) {
2577  current_dts += dts_correction;
2578  dts_correction = 0;
2579  } else {
2580  /* Avoid creating non-monotonous DTS */
2581  dts_correction += current_dts - last_dts - 1;
2582  current_dts = last_dts + 1;
2583  }
2584  last_dts = current_dts;
2585  distance++;
2586  stts_sample++;
2587  current_sample++;
2588  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2589  stts_sample = 0;
2590  stts_index++;
2591  }
2592  }
2593  }
2594  if (st->duration > 0)
2595  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2596  } else {
2597  unsigned chunk_samples, total = 0;
2598 
2599  // compute total chunk count
2600  for (i = 0; i < sc->stsc_count; i++) {
2601  unsigned count, chunk_count;
2602 
2603  chunk_samples = sc->stsc_data[i].count;
2604  if (i != sc->stsc_count - 1 &&
2605  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2606  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2607  return;
2608  }
2609 
2610  if (sc->samples_per_frame >= 160) { // gsm
2611  count = chunk_samples / sc->samples_per_frame;
2612  } else if (sc->samples_per_frame > 1) {
2613  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2614  count = (chunk_samples+samples-1) / samples;
2615  } else {
2616  count = (chunk_samples+1023) / 1024;
2617  }
2618 
2619  if (i < sc->stsc_count - 1)
2620  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2621  else
2622  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2623  total += chunk_count * count;
2624  }
2625 
2626  av_log(mov->fc, AV_LOG_TRACE, "chunk count %d\n", total);
2627  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2628  return;
2629  if (av_reallocp_array(&st->index_entries,
2630  st->nb_index_entries + total,
2631  sizeof(*st->index_entries)) < 0) {
2632  st->nb_index_entries = 0;
2633  return;
2634  }
2635  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2636 
2637  // populate index
2638  for (i = 0; i < sc->chunk_count; i++) {
2639  current_offset = sc->chunk_offsets[i];
2640  if (stsc_index + 1 < sc->stsc_count &&
2641  i + 1 == sc->stsc_data[stsc_index + 1].first)
2642  stsc_index++;
2643  chunk_samples = sc->stsc_data[stsc_index].count;
2644 
2645  while (chunk_samples > 0) {
2646  AVIndexEntry *e;
2647  unsigned size, samples;
2648 
2649  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
2650  avpriv_request_sample(mov->fc,
2651  "Zero bytes per frame, but %d samples per frame",
2652  sc->samples_per_frame);
2653  return;
2654  }
2655 
2656  if (sc->samples_per_frame >= 160) { // gsm
2657  samples = sc->samples_per_frame;
2658  size = sc->bytes_per_frame;
2659  } else {
2660  if (sc->samples_per_frame > 1) {
2661  samples = FFMIN((1024 / sc->samples_per_frame)*
2662  sc->samples_per_frame, chunk_samples);
2663  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2664  } else {
2665  samples = FFMIN(1024, chunk_samples);
2666  size = samples * sc->sample_size;
2667  }
2668  }
2669 
2670  if (st->nb_index_entries >= total) {
2671  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2672  return;
2673  }
2674  e = &st->index_entries[st->nb_index_entries++];
2675  e->pos = current_offset;
2676  e->timestamp = current_dts;
2677  e->size = size;
2678  e->min_distance = 0;
2679  e->flags = AVINDEX_KEYFRAME;
2680  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2681  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2682  size, samples);
2683 
2684  current_offset += size;
2685  current_dts += samples;
2686  chunk_samples -= samples;
2687  }
2688  }
2689  }
2690 }
2691 
2692 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref,
2693  AVIOInterruptCB *int_cb)
2694 {
2695  AVOpenCallback open_func = c->fc->open_cb;
2696 
2697  if (!open_func)
2698  open_func = ffio_open2_wrapper;
2699 
2700  /* try relative path, we do not try the absolute because it can leak information about our
2701  system to an attacker */
2702  if (ref->nlvl_to > 0 && ref->nlvl_from > 0 && ref->path[0] != '/') {
2703  char filename[1025];
2704  const char *src_path;
2705  int i, l;
2706 
2707  /* find a source dir */
2708  src_path = strrchr(src, '/');
2709  if (src_path)
2710  src_path++;
2711  else
2712  src_path = src;
2713 
2714  /* find a next level down to target */
2715  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2716  if (ref->path[l] == '/') {
2717  if (i == ref->nlvl_to - 1)
2718  break;
2719  else
2720  i++;
2721  }
2722 
2723  /* compose filename if next level down to target was found */
2724  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2725  memcpy(filename, src, src_path - src);
2726  filename[src_path - src] = 0;
2727 
2728  for (i = 1; i < ref->nlvl_from; i++)
2729  av_strlcat(filename, "../", sizeof(filename));
2730 
2731  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
2732  if (!c->use_absolute_path && !c->fc->open_cb)
2733  if(strstr(ref->path + l + 1, "..") || ref->nlvl_from > 1)
2734  return AVERROR(ENOENT);
2735 
2736  if (strlen(filename) + 1 == sizeof(filename))
2737  return AVERROR(ENOENT);
2738  if (!open_func(c->fc, pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2739  return 0;
2740  }
2741  } else if (c->use_absolute_path) {
2742  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
2743  "this is a possible security issue\n");
2744  if (!open_func(c->fc, pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2745  return 0;
2746  } else if (c->fc->open_cb) {
2747  if (!open_func(c->fc, pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2748  return 0;
2749  } else {
2750  av_log(c->fc, AV_LOG_ERROR,
2751  "Absolute path %s not tried for security reasons, "
2752  "set demuxer option use_absolute_path to allow absolute paths\n",
2753  ref->path);
2754  }
2755 
2756  return AVERROR(ENOENT);
2757 }
2758 
2759 static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
2760 {
2761  if (sc->time_scale <= 0) {
2762  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2763  sc->time_scale = c->time_scale;
2764  if (sc->time_scale <= 0)
2765  sc->time_scale = 1;
2766  }
2767 }
2768 
2769 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2770 {
2771  AVStream *st;
2772  MOVStreamContext *sc;
2773  int ret;
2774 
2775  st = avformat_new_stream(c->fc, NULL);
2776  if (!st) return AVERROR(ENOMEM);
2777  st->id = c->fc->nb_streams;
2778  sc = av_mallocz(sizeof(MOVStreamContext));
2779  if (!sc) return AVERROR(ENOMEM);
2780 
2781  st->priv_data = sc;
2782  st->codec->codec_type = AVMEDIA_TYPE_DATA;
2783  sc->ffindex = st->index;
2784 
2785  if ((ret = mov_read_default(c, pb, atom)) < 0)
2786  return ret;
2787 
2788  /* sanity checks */
2789  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2790  (!sc->sample_size && !sc->sample_count))) {
2791  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2792  st->index);
2793  return 0;
2794  }
2795 
2796  fix_timescale(c, sc);
2797 
2798  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2799 
2800  mov_build_index(c, st);
2801 
2802  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2803  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2804  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref,
2805  &c->fc->interrupt_callback) < 0)
2806  av_log(c->fc, AV_LOG_ERROR,
2807  "stream %d, error opening alias: path='%s', dir='%s', "
2808  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2809  st->index, dref->path, dref->dir, dref->filename,
2810  dref->volume, dref->nlvl_from, dref->nlvl_to);
2811  } else {
2812  sc->pb = c->fc->pb;
2813  sc->pb_is_copied = 1;
2814  }
2815 
2816  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2817  if (!st->sample_aspect_ratio.num && st->codec->width && st->codec->height &&
2818  sc->height && sc->width &&
2819  (st->codec->width != sc->width || st->codec->height != sc->height)) {
2820  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2821  ((double)st->codec->width * sc->height), INT_MAX);
2822  }
2823 
2824 #if FF_API_R_FRAME_RATE
2825  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2826  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
2827  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2828 #endif
2829  }
2830 
2831  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2832  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2833  TAG_IS_AVCI(st->codec->codec_tag)) {
2834  ret = ff_generate_avci_extradata(st);
2835  if (ret < 0)
2836  return ret;
2837  }
2838 
2839  switch (st->codec->codec_id) {
2840 #if CONFIG_H261_DECODER
2841  case AV_CODEC_ID_H261:
2842 #endif
2843 #if CONFIG_H263_DECODER
2844  case AV_CODEC_ID_H263:
2845 #endif
2846 #if CONFIG_MPEG4_DECODER
2847  case AV_CODEC_ID_MPEG4:
2848 #endif
2849  st->codec->width = 0; /* let decoder init width/height */
2850  st->codec->height= 0;
2851  break;
2852  }
2853 
2854  /* Do not need those anymore. */
2855  av_freep(&sc->chunk_offsets);
2856  av_freep(&sc->stsc_data);
2857  av_freep(&sc->sample_sizes);
2858  av_freep(&sc->keyframes);
2859  av_freep(&sc->stts_data);
2860  av_freep(&sc->stps_data);
2861  av_freep(&sc->elst_data);
2862  av_freep(&sc->rap_group);
2863 
2864  return 0;
2865 }
2866 
2867 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2868 {
2869  int ret;
2870  c->itunes_metadata = 1;
2871  ret = mov_read_default(c, pb, atom);
2872  c->itunes_metadata = 0;
2873  return ret;
2874 }
2875 
2876 static int mov_read_custom_2plus(MOVContext *c, AVIOContext *pb, int size)
2877 {
2878  int64_t end = avio_tell(pb) + size;
2879  uint8_t *key = NULL, *val = NULL;
2880  int i;
2881  AVStream *st;
2882  MOVStreamContext *sc;
2883 
2884  if (c->fc->nb_streams < 1)
2885  return 0;
2886  st = c->fc->streams[c->fc->nb_streams-1];
2887  sc = st->priv_data;
2888 
2889  for (i = 0; i < 2; i++) {
2890  uint8_t **p;
2891  uint32_t len, tag;
2892  int ret;
2893 
2894  if (end - avio_tell(pb) <= 12)
2895  break;
2896 
2897  len = avio_rb32(pb);
2898  tag = avio_rl32(pb);
2899  avio_skip(pb, 4); // flags
2900 
2901  if (len < 12 || len - 12 > end - avio_tell(pb))
2902  break;
2903  len -= 12;
2904 
2905  if (tag == MKTAG('n', 'a', 'm', 'e'))
2906  p = &key;
2907  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
2908  avio_skip(pb, 4);
2909  len -= 4;
2910  p = &val;
2911  } else
2912  break;
2913 
2914  *p = av_malloc(len + 1);
2915  if (!*p)
2916  break;
2917  ret = ffio_read_size(pb, *p, len);
2918  if (ret < 0) {
2919  av_freep(p);
2920  return ret;
2921  }
2922  (*p)[len] = 0;
2923  }
2924 
2925  if (key && val) {
2926  if (strcmp(key, "iTunSMPB") == 0) {
2927  int priming, remainder, samples;
2928  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
2929  if(priming>0 && priming<16384)
2930  sc->start_pad = priming;
2931  }
2932  }
2933  if (strcmp(key, "cdec") != 0) {
2934  av_dict_set(&c->fc->metadata, key, val,
2935  AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
2936  key = val = NULL;
2937  }
2938  }
2939 
2940  avio_seek(pb, end, SEEK_SET);
2941  av_freep(&key);
2942  av_freep(&val);
2943  return 0;
2944 }
2945 
2946 static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2947 {
2948  int64_t end = avio_tell(pb) + atom.size;
2949  uint32_t tag, len;
2950 
2951  if (atom.size < 8)
2952  goto fail;
2953 
2954  len = avio_rb32(pb);
2955  tag = avio_rl32(pb);
2956 
2957  if (len > atom.size)
2958  goto fail;
2959 
2960  if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
2961  uint8_t domain[128];
2962  int domain_len;
2963 
2964  avio_skip(pb, 4); // flags
2965  len -= 12;
2966 
2967  domain_len = avio_get_str(pb, len, domain, sizeof(domain));
2968  avio_skip(pb, len - domain_len);
2969  return mov_read_custom_2plus(c, pb, end - avio_tell(pb));
2970  }
2971 
2972 fail:
2973  av_log(c->fc, AV_LOG_VERBOSE,
2974  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
2975  return 0;
2976 }
2977 
2978 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2979 {
2980  while (atom.size > 8) {
2981  uint32_t tag = avio_rl32(pb);
2982  atom.size -= 4;
2983  if (tag == MKTAG('h','d','l','r')) {
2984  avio_seek(pb, -8, SEEK_CUR);
2985  atom.size += 8;
2986  return mov_read_default(c, pb, atom);
2987  }
2988  }
2989  return 0;
2990 }
2991 
2992 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2993 {
2994  int i;
2995  int width;
2996  int height;
2997  int display_matrix[3][3];
2998  AVStream *st;
2999  MOVStreamContext *sc;
3000  int version;
3001  int flags;
3002 
3003  if (c->fc->nb_streams < 1)
3004  return 0;
3005  st = c->fc->streams[c->fc->nb_streams-1];
3006  sc = st->priv_data;
3007 
3008  version = avio_r8(pb);
3009  flags = avio_rb24(pb);
3010  st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
3011 
3012  if (version == 1) {
3013  avio_rb64(pb);
3014  avio_rb64(pb);
3015  } else {
3016  avio_rb32(pb); /* creation time */
3017  avio_rb32(pb); /* modification time */
3018  }
3019  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
3020  avio_rb32(pb); /* reserved */
3021 
3022  /* highlevel (considering edits) duration in movie timebase */
3023  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
3024  avio_rb32(pb); /* reserved */
3025  avio_rb32(pb); /* reserved */
3026 
3027  avio_rb16(pb); /* layer */
3028  avio_rb16(pb); /* alternate group */
3029  avio_rb16(pb); /* volume */
3030  avio_rb16(pb); /* reserved */
3031 
3032  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
3033  // they're kept in fixed point format through all calculations
3034  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
3035  // side data, but the scale factor is not needed to calculate aspect ratio
3036  for (i = 0; i < 3; i++) {
3037  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
3038  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
3039  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
3040  }
3041 
3042  width = avio_rb32(pb); // 16.16 fixed point track width
3043  height = avio_rb32(pb); // 16.16 fixed point track height
3044  sc->width = width >> 16;
3045  sc->height = height >> 16;
3046 
3047  // save the matrix and add rotate metadata when it is not the default
3048  // identity
3049  if (display_matrix[0][0] != (1 << 16) ||
3050  display_matrix[1][1] != (1 << 16) ||
3051  display_matrix[2][2] != (1 << 30) ||
3052  display_matrix[0][1] || display_matrix[0][2] ||
3053  display_matrix[1][0] || display_matrix[1][2] ||
3054  display_matrix[2][0] || display_matrix[2][1]) {
3055  int i, j;
3056  double rotate;
3057 
3058  av_freep(&sc->display_matrix);
3059  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
3060  if (!sc->display_matrix)
3061  return AVERROR(ENOMEM);
3062 
3063  for (i = 0; i < 3; i++)
3064  for (j = 0; j < 3; j++)
3065  sc->display_matrix[i * 3 + j] = display_matrix[i][j];
3066 
3067  rotate = av_display_rotation_get(sc->display_matrix);
3068  if (!isnan(rotate)) {
3069  char rotate_buf[64];
3070  rotate = -rotate;
3071  if (rotate < 0) // for backward compatibility
3072  rotate += 360;
3073  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
3074  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
3075  }
3076  }
3077 
3078  // transform the display width/height according to the matrix
3079  // to keep the same scale, use [width height 1<<16]
3080  if (width && height && sc->display_matrix) {
3081  double disp_transform[2];
3082 
3083 #define SQR(a) ((a)*(double)(a))
3084  for (i = 0; i < 2; i++)
3085  disp_transform[i] = sqrt(SQR(display_matrix[i][0]) + SQR(display_matrix[i][1]));
3086 
3087  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
3088  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
3089  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
3090  st->sample_aspect_ratio = av_d2q(
3091  disp_transform[0] / disp_transform[1],
3092  INT_MAX);
3093  }
3094  return 0;
3095 }
3096 
3097 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3098 {
3099  MOVFragment *frag = &c->fragment;
3100  MOVTrackExt *trex = NULL;
3101  MOVFragmentIndex* index = NULL;
3102  int flags, track_id, i;
3103 
3104  avio_r8(pb); /* version */
3105  flags = avio_rb24(pb);
3106 
3107  track_id = avio_rb32(pb);
3108  if (!track_id)
3109  return AVERROR_INVALIDDATA;
3110  frag->track_id = track_id;
3111  for (i = 0; i < c->trex_count; i++)
3112  if (c->trex_data[i].track_id == frag->track_id) {
3113  trex = &c->trex_data[i];
3114  break;
3115  }
3116  if (!trex) {
3117  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
3118  return AVERROR_INVALIDDATA;
3119  }
3120  for (i = 0; i < c->fragment_index_count; i++) {
3121  MOVFragmentIndex* candidate = c->fragment_index_data[i];
3122  if (candidate->track_id == frag->track_id) {
3123  av_log(c->fc, AV_LOG_DEBUG,
3124  "found fragment index for track %u\n", frag->track_id);
3125  index = candidate;
3126  break;
3127  }
3128  }
3129 
3130  frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
3131  avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
3132  frag->moof_offset : frag->implicit_offset;
3133  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
3134 
3135  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
3136  avio_rb32(pb) : trex->duration;
3137  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
3138  avio_rb32(pb) : trex->size;
3139  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
3140  avio_rb32(pb) : trex->flags;
3141  frag->time = AV_NOPTS_VALUE;
3142  if (index) {
3143  int i, found = 0;
3144  for (i = index->current_item; i < index->item_count; i++) {
3145  if (frag->implicit_offset == index->items[i].moof_offset) {
3146  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
3147  "for track %u and moof_offset %"PRId64"\n",
3148  frag->track_id, index->items[i].moof_offset);
3149  frag->time = index->items[i].time;
3150  index->current_item = i + 1;
3151  found = 1;
3152  }
3153  }
3154  if (!found) {
3155  av_log(c->fc, AV_LOG_WARNING, "track %u has a fragment index "
3156  "but it doesn't have an (in-order) entry for moof_offset "
3157  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
3158  }
3159  }
3160  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
3161  return 0;
3162 }
3163 
3164 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3165 {
3166  c->chapter_track = avio_rb32(pb);
3167  return 0;
3168 }
3169 
3170 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3171 {
3172  MOVTrackExt *trex;
3173  int err;
3174 
3175  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
3176  return AVERROR_INVALIDDATA;
3177  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
3178  sizeof(*c->trex_data))) < 0) {
3179  c->trex_count = 0;
3180  return err;
3181  }
3182 
3183  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
3184 
3185  trex = &c->trex_data[c->trex_count++];
3186  avio_r8(pb); /* version */
3187  avio_rb24(pb); /* flags */
3188  trex->track_id = avio_rb32(pb);
3189  trex->stsd_id = avio_rb32(pb);
3190  trex->duration = avio_rb32(pb);
3191  trex->size = avio_rb32(pb);
3192  trex->flags = avio_rb32(pb);
3193  return 0;
3194 }
3195 
3196 static int mov_read_tfdt(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3197 {
3198  MOVFragment *frag = &c->fragment;
3199  AVStream *st = NULL;
3200  MOVStreamContext *sc;
3201  int version, i;
3202 
3203  for (i = 0; i < c->fc->nb_streams; i++) {
3204  if (c->fc->streams[i]->id == frag->track_id) {
3205  st = c->fc->streams[i];
3206  break;
3207  }
3208  }
3209  if (!st) {
3210  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3211  return AVERROR_INVALIDDATA;
3212  }
3213  sc = st->priv_data;
3214  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
3215  return 0;
3216  version = avio_r8(pb);
3217  avio_rb24(pb); /* flags */
3218  if (version) {
3219  sc->track_end = avio_rb64(pb);
3220  } else {
3221  sc->track_end = avio_rb32(pb);
3222  }
3223  return 0;
3224 }
3225 
3226 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3227 {
3228  MOVFragment *frag = &c->fragment;
3229  AVStream *st = NULL;
3230  MOVStreamContext *sc;
3231  MOVStts *ctts_data;
3232  uint64_t offset;
3233  int64_t dts;
3234  int data_offset = 0;
3235  unsigned entries, first_sample_flags = frag->flags;
3236  int flags, distance, i, found_keyframe = 0, err;
3237 
3238  for (i = 0; i < c->fc->nb_streams; i++) {
3239  if (c->fc->streams[i]->id == frag->track_id) {
3240  st = c->fc->streams[i];
3241  break;
3242  }
3243  }
3244  if (!st) {
3245  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3246  return AVERROR_INVALIDDATA;
3247  }
3248  sc = st->priv_data;
3249  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
3250  return 0;
3251  avio_r8(pb); /* version */
3252  flags = avio_rb24(pb);
3253  entries = avio_rb32(pb);
3254  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %d\n", flags, entries);
3255 
3256  /* Always assume the presence of composition time offsets.
3257  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
3258  * 1) in the initial movie, there are no samples.
3259  * 2) in the first movie fragment, there is only one sample without composition time offset.
3260  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
3261  if (!sc->ctts_count && sc->sample_count)
3262  {
3263  /* Complement ctts table if moov atom doesn't have ctts atom. */
3264  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
3265  if (!ctts_data)
3266  return AVERROR(ENOMEM);
3267  sc->ctts_data = ctts_data;
3268  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
3269  sc->ctts_data[sc->ctts_count].duration = 0;
3270  sc->ctts_count++;
3271  }
3272  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
3273  return AVERROR_INVALIDDATA;
3274  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
3275  sizeof(*sc->ctts_data))) < 0) {
3276  sc->ctts_count = 0;
3277  return err;
3278  }
3279  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
3280  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
3281  dts = sc->track_end - sc->time_offset;
3282  offset = frag->base_data_offset + data_offset;
3283  distance = 0;
3284  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
3285  for (i = 0; i < entries && !pb->eof_reached; i++) {
3286  unsigned sample_size = frag->size;
3287  int sample_flags = i ? frag->flags : first_sample_flags;
3288  unsigned sample_duration = frag->duration;
3289  int keyframe = 0;
3290 
3291  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
3292  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
3293  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
3294  sc->ctts_data[sc->ctts_count].count = 1;
3295  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
3296  avio_rb32(pb) : 0;
3297  mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
3298  if (frag->time != AV_NOPTS_VALUE) {
3299  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
3300  int64_t pts = frag->time;
3301  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3302  " sc->dts_shift %d ctts.duration %d"
3303  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
3304  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
3305  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
3306  dts = pts - sc->dts_shift;
3307  if (flags & MOV_TRUN_SAMPLE_CTS) {
3308  dts -= sc->ctts_data[sc->ctts_count].duration;
3309  } else {
3310  dts -= sc->time_offset;
3311  }
3312  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
3313  } else {
3314  dts = frag->time;
3315  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3316  ", using it for dts\n", dts);
3317  }
3318  frag->time = AV_NOPTS_VALUE;
3319  }
3320  sc->ctts_count++;
3321  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3322  keyframe = 1;
3323  else if (!found_keyframe)
3324  keyframe = found_keyframe =
3325  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
3326  MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
3327  if (keyframe)
3328  distance = 0;
3329  err = av_add_index_entry(st, offset, dts, sample_size, distance,
3330  keyframe ? AVINDEX_KEYFRAME : 0);
3331  if (err < 0) {
3332  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
3333  }
3334  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3335  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
3336  offset, dts, sample_size, distance, keyframe);
3337  distance++;
3338  dts += sample_duration;
3339  offset += sample_size;
3340  sc->data_size += sample_size;
3341  sc->duration_for_fps += sample_duration;
3342  sc->nb_frames_for_fps ++;
3343  }
3344 
3345  if (pb->eof_reached)
3346  return AVERROR_EOF;
3347 
3348  frag->implicit_offset = offset;
3349  st->duration = sc->track_end = dts + sc->time_offset;
3350  return 0;
3351 }
3352 
3353 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
3354 /* like the files created with Adobe Premiere 5.0, for samples see */
3355 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
3356 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3357 {
3358  int err;
3359 
3360  if (atom.size < 8)
3361  return 0; /* continue */
3362  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
3363  avio_skip(pb, atom.size - 4);
3364  return 0;
3365  }
3366  atom.type = avio_rl32(pb);
3367  atom.size -= 8;
3368  if (atom.type != MKTAG('m','d','a','t')) {
3369  avio_skip(pb, atom.size);
3370  return 0;
3371  }
3372  err = mov_read_mdat(c, pb, atom);
3373  return err;
3374 }
3375 
3376 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3377 {
3378 #if CONFIG_ZLIB
3379  AVIOContext ctx;
3380  uint8_t *cmov_data;
3381  uint8_t *moov_data; /* uncompressed data */
3382  long cmov_len, moov_len;
3383  int ret = -1;
3384 
3385  avio_rb32(pb); /* dcom atom */
3386  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
3387  return AVERROR_INVALIDDATA;
3388  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
3389  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
3390  return AVERROR_INVALIDDATA;
3391  }
3392  avio_rb32(pb); /* cmvd atom */
3393  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
3394  return AVERROR_INVALIDDATA;
3395  moov_len = avio_rb32(pb); /* uncompressed size */
3396  cmov_len = atom.size - 6 * 4;
3397 
3398  cmov_data = av_malloc(cmov_len);
3399  if (!cmov_data)
3400  return AVERROR(ENOMEM);
3401  moov_data = av_malloc(moov_len);
3402  if (!moov_data) {
3403  av_free(cmov_data);
3404  return AVERROR(ENOMEM);
3405  }
3406  ret = ffio_read_size(pb, cmov_data, cmov_len);
3407  if (ret < 0)
3408  goto free_and_return;
3409 
3410  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
3411  goto free_and_return;
3412  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
3413  goto free_and_return;
3414  ctx.seekable = AVIO_SEEKABLE_NORMAL;
3415  atom.type = MKTAG('m','o','o','v');
3416  atom.size = moov_len;
3417  ret = mov_read_default(c, &ctx, atom);
3418 free_and_return:
3419  av_free(moov_data);
3420  av_free(cmov_data);
3421  return ret;
3422 #else
3423  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
3424  return AVERROR(ENOSYS);
3425 #endif
3426 }
3427 
3428 /* edit list atom */
3429 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3430 {
3431  MOVStreamContext *sc;
3432  int i, edit_count, version;
3433 
3434  if (c->fc->nb_streams < 1 || c->ignore_editlist)
3435  return 0;
3436  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
3437 
3438  version = avio_r8(pb); /* version */
3439  avio_rb24(pb); /* flags */
3440  edit_count = avio_rb32(pb); /* entries */
3441 
3442  if (!edit_count)
3443  return 0;
3444  if (sc->elst_data)
3445  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
3446  av_free(sc->elst_data);
3447  sc->elst_count = 0;
3448  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
3449  if (!sc->elst_data)
3450  return AVERROR(ENOMEM);
3451 
3452  av_log(c->fc, AV_LOG_TRACE, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3453  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
3454  MOVElst *e = &sc->elst_data[i];
3455 
3456  if (version == 1) {
3457  e->duration = avio_rb64(pb);
3458  e->time = avio_rb64(pb);
3459  } else {
3460  e->duration = avio_rb32(pb); /* segment duration */
3461  e->time = (int32_t)avio_rb32(pb); /* media time */
3462  }
3463  e->rate = avio_rb32(pb) / 65536.0;
3464  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3465  e->duration, e->time, e->rate);
3466  }
3467  sc->elst_count = i;
3468 
3469  return 0;
3470 }
3471 
3472 static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3473 {
3474  MOVStreamContext *sc;
3475 
3476  if (c->fc->nb_streams < 1)
3477  return AVERROR_INVALIDDATA;
3478  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3479  sc->timecode_track = avio_rb32(pb);
3480  return 0;
3481 }
3482 
3483 static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3484 {
3485  int ret;
3486  uint8_t uuid[16];
3487  static const uint8_t uuid_isml_manifest[] = {
3488  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3489  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3490  };
3491 
3492  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3493  return AVERROR_INVALIDDATA;
3494 
3495  ret = avio_read(pb, uuid, sizeof(uuid));
3496  if (ret < 0) {
3497  return ret;
3498  } else if (ret != sizeof(uuid)) {
3499  return AVERROR_INVALIDDATA;
3500  }
3501  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3502  uint8_t *buffer, *ptr;
3503  char *endptr;
3504  size_t len = atom.size - sizeof(uuid);
3505 
3506  if (len < 4) {
3507  return AVERROR_INVALIDDATA;
3508  }
3509  ret = avio_skip(pb, 4); // zeroes
3510  len -= 4;
3511 
3512  buffer = av_mallocz(len + 1);
3513  if (!buffer) {
3514  return AVERROR(ENOMEM);
3515  }
3516  ret = avio_read(pb, buffer, len);
3517  if (ret < 0) {
3518  av_free(buffer);
3519  return ret;
3520  } else if (ret != len) {
3521  av_free(buffer);
3522  return AVERROR_INVALIDDATA;
3523  }
3524 
3525  ptr = buffer;
3526  while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
3527  ptr += sizeof("systemBitrate=\"") - 1;
3528  c->bitrates_count++;
3529  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3530  if (!c->bitrates) {
3531  c->bitrates_count = 0;
3532  av_free(buffer);
3533  return AVERROR(ENOMEM);
3534  }
3535  errno = 0;
3536  ret = strtol(ptr, &endptr, 10);
3537  if (ret < 0 || errno || *endptr != '"') {
3538  c->bitrates[c->bitrates_count - 1] = 0;
3539  } else {
3540  c->bitrates[c->bitrates_count - 1] = ret;
3541  }
3542  }
3543 
3544  av_free(buffer);
3545  }
3546  return 0;
3547 }
3548 
3549 static int mov_read_free(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3550 {
3551  int ret;
3552  uint8_t content[16];
3553 
3554  if (atom.size < 8)
3555  return 0;
3556 
3557  ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
3558  if (ret < 0)
3559  return ret;
3560 
3561  if ( !c->found_moov
3562  && !c->found_mdat
3563  && !memcmp(content, "Anevia\x1A\x1A", 8)
3564  && c->use_mfra_for == FF_MOV_FLAG_MFRA_AUTO) {
3565  c->use_mfra_for = FF_MOV_FLAG_MFRA_PTS;
3566  }
3567 
3568  return 0;
3569 }
3570 
3571 static const MOVParseTableEntry mov_default_parse_table[] = {
3572 { MKTAG('A','C','L','R'), mov_read_aclr },
3573 { MKTAG('A','P','R','G'), mov_read_avid },
3574 { MKTAG('A','A','L','P'), mov_read_avid },
3575 { MKTAG('A','R','E','S'), mov_read_ares },
3576 { MKTAG('a','v','s','s'), mov_read_avss },
3577 { MKTAG('c','h','p','l'), mov_read_chpl },
3578 { MKTAG('c','o','6','4'), mov_read_stco },
3579 { MKTAG('c','o','l','r'), mov_read_colr },
3580 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
3581 { MKTAG('d','i','n','f'), mov_read_default },
3582 { MKTAG('D','p','x','E'), mov_read_dpxe },
3583 { MKTAG('d','r','e','f'), mov_read_dref },
3584 { MKTAG('e','d','t','s'), mov_read_default },
3585 { MKTAG('e','l','s','t'), mov_read_elst },
3586 { MKTAG('e','n','d','a'), mov_read_enda },
3587 { MKTAG('f','i','e','l'), mov_read_fiel },
3588 { MKTAG('f','t','y','p'), mov_read_ftyp },
3589 { MKTAG('g','l','b','l'), mov_read_glbl },
3590 { MKTAG('h','d','l','r'), mov_read_hdlr },
3591 { MKTAG('i','l','s','t'), mov_read_ilst },
3592 { MKTAG('j','p','2','h'), mov_read_jp2h },
3593 { MKTAG('m','d','a','t'), mov_read_mdat },
3594 { MKTAG('m','d','h','d'), mov_read_mdhd },
3595 { MKTAG('m','d','i','a'), mov_read_default },
3596 { MKTAG('m','e','t','a'), mov_read_meta },
3597 { MKTAG('m','i','n','f'), mov_read_default },
3598 { MKTAG('m','o','o','f'), mov_read_moof },
3599 { MKTAG('m','o','o','v'), mov_read_moov },
3600 { MKTAG('m','v','e','x'), mov_read_default },
3601 { MKTAG('m','v','h','d'), mov_read_mvhd },
3602 { MKTAG('S','M','I',' '), mov_read_svq3 },
3603 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
3604 { MKTAG('a','v','c','C'), mov_read_glbl },
3605 { MKTAG('p','a','s','p'), mov_read_pasp },
3606 { MKTAG('s','t','b','l'), mov_read_default },
3607 { MKTAG('s','t','c','o'), mov_read_stco },
3608 { MKTAG('s','t','p','s'), mov_read_stps },
3609 { MKTAG('s','t','r','f'), mov_read_strf },
3610 { MKTAG('s','t','s','c'), mov_read_stsc },
3611 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
3612 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
3613 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
3614 { MKTAG('s','t','t','s'), mov_read_stts },
3615 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
3616 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
3617 { MKTAG('t','f','d','t'), mov_read_tfdt },
3618 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
3619 { MKTAG('t','r','a','k'), mov_read_trak },
3620 { MKTAG('t','r','a','f'), mov_read_default },
3621 { MKTAG('t','r','e','f'), mov_read_default },
3622 { MKTAG('t','m','c','d'), mov_read_tmcd },
3623 { MKTAG('c','h','a','p'), mov_read_chap },
3624 { MKTAG('t','r','e','x'), mov_read_trex },
3625 { MKTAG('t','r','u','n'), mov_read_trun },
3626 { MKTAG('u','d','t','a'), mov_read_default },
3627 { MKTAG('w','a','v','e'), mov_read_wave },
3628 { MKTAG('e','s','d','s'), mov_read_esds },
3629 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
3630 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
3631 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
3632 { MKTAG('w','f','e','x'), mov_read_wfex },
3633 { MKTAG('c','m','o','v'), mov_read_cmov },
3634 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
3635 { MKTAG('d','v','c','1'), mov_read_dvc1 },
3636 { MKTAG('s','b','g','p'), mov_read_sbgp },
3637 { MKTAG('h','v','c','C'), mov_read_glbl },
3638 { MKTAG('u','u','i','d'), mov_read_uuid },
3639 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
3640 { MKTAG('f','r','e','e'), mov_read_free },
3641 { MKTAG('-','-','-','-'), mov_read_custom },
3642 { 0, NULL }
3643 };
3644 
3645 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3646 {
3647  int64_t total_size = 0;
3648  MOVAtom a;
3649  int i;
3650 
3651  if (c->atom_depth > 10) {
3652  av_log(c->fc, AV_LOG_ERROR, "Atoms too deeply nested\n");
3653  return AVERROR_INVALIDDATA;
3654  }
3655  c->atom_depth ++;
3656 
3657  if (atom.size < 0)
3658  atom.size = INT64_MAX;
3659  while (total_size + 8 <= atom.size && !avio_feof(pb)) {
3660  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
3661  a.size = atom.size;
3662  a.type=0;
3663  if (atom.size >= 8) {
3664  a.size = avio_rb32(pb);
3665  a.type = avio_rl32(pb);
3666  if (a.type == MKTAG('f','r','e','e') &&
3667  a.size >= 8 &&
3668  c->moov_retry) {
3669  uint8_t buf[8];
3670  uint32_t *type = (uint32_t *)buf + 1;
3671  if (avio_read(pb, buf, 8) != 8)
3672  return AVERROR_INVALIDDATA;
3673  avio_seek(pb, -8, SEEK_CUR);
3674  if (*type == MKTAG('m','v','h','d') ||
3675  *type == MKTAG('c','m','o','v')) {
3676  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
3677  a.type = MKTAG('m','o','o','v');
3678  }
3679  }
3680  if (atom.type != MKTAG('r','o','o','t') &&
3681  atom.type != MKTAG('m','o','o','v'))
3682  {
3683  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
3684  {
3685  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
3686  avio_skip(pb, -8);
3687  c->atom_depth --;
3688  return 0;
3689  }
3690  }
3691  total_size += 8;
3692  if (a.size == 1 && total_size + 8 <= atom.size) { /* 64 bit extended size */
3693  a.size = avio_rb64(pb) - 8;
3694  total_size += 8;
3695  }
3696  }
3697  av_log(c->fc, AV_LOG_TRACE, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3698  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3699  if (a.size == 0) {
3700  a.size = atom.size - total_size + 8;
3701  }
3702  a.size -= 8;
3703  if (a.size < 0)
3704  break;
3705  a.size = FFMIN(a.size, atom.size - total_size);
3706 
3707  for (i = 0; mov_default_parse_table[i].type; i++)
3708  if (mov_default_parse_table[i].type == a.type) {
3709  parse = mov_default_parse_table[i].parse;
3710  break;
3711  }
3712 
3713  // container is user data
3714  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3715  atom.type == MKTAG('i','l','s','t')))
3716  parse = mov_read_udta_string;
3717 
3718  if (!parse) { /* skip leaf atoms data */
3719  avio_skip(pb, a.size);
3720  } else {
3721  int64_t start_pos = avio_tell(pb);
3722  int64_t left;
3723  int err = parse(c, pb, a);
3724  if (err < 0) {
3725  c->atom_depth --;
3726  return err;
3727  }
3728  if (c->found_moov && c->found_mdat &&
3729  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3730  start_pos + a.size == avio_size(pb))) {
3731  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3732  c->next_root_atom = start_pos + a.size;
3733  c->atom_depth --;
3734  return 0;
3735  }
3736  left = a.size - avio_tell(pb) + start_pos;
3737  if (left > 0) /* skip garbage at atom end */
3738  avio_skip(pb, left);
3739  else if (left < 0) {
3740  av_log(c->fc, AV_LOG_WARNING,
3741  "overread end of atom '%.4s' by %"PRId64" bytes\n",
3742  (char*)&a.type, -left);
3743  avio_seek(pb, left, SEEK_CUR);
3744  }
3745  }
3746 
3747  total_size += a.size;
3748  }
3749 
3750  if (total_size < atom.size && atom.size < 0x7ffff)
3751  avio_skip(pb, atom.size - total_size);
3752 
3753  c->atom_depth --;
3754  return 0;
3755 }
3756 
3757 static int mov_probe(AVProbeData *p)
3758 {
3759  int64_t offset;
3760  uint32_t tag;
3761  int score = 0;
3762  int moov_offset = -1;
3763 
3764  /* check file header */
3765  offset = 0;
3766  for (;;) {
3767  /* ignore invalid offset */
3768  if ((offset + 8) > (unsigned int)p->buf_size)
3769  break;
3770  tag = AV_RL32(p->buf + offset + 4);
3771  switch(tag) {
3772  /* check for obvious tags */
3773  case MKTAG('m','o','o','v'):
3774  moov_offset = offset + 4;
3775  case MKTAG('m','d','a','t'):
3776  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3777  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3778  case MKTAG('f','t','y','p'):
3779  if (AV_RB32(p->buf+offset) < 8 &&
3780  (AV_RB32(p->buf+offset) != 1 ||
3781  offset + 12 > (unsigned int)p->buf_size ||
3782  AV_RB64(p->buf+offset + 8) == 0)) {
3783  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3784  } else if (tag == MKTAG('f','t','y','p') &&
3785  ( AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')
3786  || AV_RL32(p->buf + offset + 8) == MKTAG('j','p','x',' ')
3787  )) {
3788  score = FFMAX(score, 5);
3789  } else {
3790  score = AVPROBE_SCORE_MAX;
3791  }
3792  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3793  break;
3794  /* those are more common words, so rate then a bit less */
3795  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3796  case MKTAG('w','i','d','e'):
3797  case MKTAG('f','r','e','e'):
3798  case MKTAG('j','u','n','k'):
3799  case MKTAG('p','i','c','t'):
3800  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3801  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3802  break;
3803  case MKTAG(0x82,0x82,0x7f,0x7d):
3804  case MKTAG('s','k','i','p'):
3805  case MKTAG('u','u','i','d'):
3806  case MKTAG('p','r','f','l'):
3807  /* if we only find those cause probedata is too small at least rate them */
3808  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3809  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3810  break;
3811  default:
3812  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3813  }
3814  }
3815  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3816  /* moov atom in the header - we should make sure that this is not a
3817  * MOV-packed MPEG-PS */
3818  offset = moov_offset;
3819 
3820  while(offset < (p->buf_size - 16)){ /* Sufficient space */
3821  /* We found an actual hdlr atom */
3822  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3823  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3824  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3825  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3826  /* We found a media handler reference atom describing an
3827  * MPEG-PS-in-MOV, return a
3828  * low score to force expanding the probe window until
3829  * mpegps_probe finds what it needs */
3830  return 5;
3831  }else
3832  /* Keep looking */
3833  offset+=2;
3834  }
3835  }
3836 
3837  return score;
3838 }
3839 
3840 // must be done after parsing all trak because there's no order requirement
3841 static void mov_read_chapters(AVFormatContext *s)
3842 {
3843  MOVContext *mov = s->priv_data;
3844  AVStream *st = NULL;
3845  MOVStreamContext *sc;
3846  int64_t cur_pos;
3847  int i;
3848 
3849  for (i = 0; i < s->nb_streams; i++)
3850  if (s->streams[i]->id == mov->chapter_track) {
3851  st = s->streams[i];
3852  break;
3853  }
3854  if (!st) {
3855  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3856  return;
3857  }
3858 
3859  st->discard = AVDISCARD_ALL;
3860  sc = st->priv_data;
3861  cur_pos = avio_tell(sc->pb);
3862 
3863  for (i = 0; i < st->nb_index_entries; i++) {
3864  AVIndexEntry *sample = &st->index_entries[i];
3865  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3866  uint8_t *title;
3867  uint16_t ch;
3868  int len, title_len;
3869 
3870  if (end < sample->timestamp) {
3871  av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
3872  end = AV_NOPTS_VALUE;
3873  }
3874 
3875  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3876  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3877  goto finish;
3878  }
3879 
3880  // the first two bytes are the length of the title
3881  len = avio_rb16(sc->pb);
3882  if (len > sample->size-2)
3883  continue;
3884  title_len = 2*len + 1;
3885  if (!(title = av_mallocz(title_len)))
3886  goto finish;
3887 
3888  // The samples could theoretically be in any encoding if there's an encd
3889  // atom following, but in practice are only utf-8 or utf-16, distinguished
3890  // instead by the presence of a BOM
3891  if (!len) {
3892  title[0] = 0;
3893  } else {
3894  ch = avio_rb16(sc->pb);
3895  if (ch == 0xfeff)
3896  avio_get_str16be(sc->pb, len, title, title_len);
3897  else if (ch == 0xfffe)
3898  avio_get_str16le(sc->pb, len, title, title_len);
3899  else {
3900  AV_WB16(title, ch);
3901  if (len == 1 || len == 2)
3902  title[len] = 0;
3903  else
3904  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3905  }
3906  }
3907 
3908  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3909  av_freep(&title);
3910  }
3911 finish:
3912  avio_seek(sc->pb, cur_pos, SEEK_SET);
3913 }
3914 
3915 static int parse_timecode_in_framenum_format(AVFormatContext *s, AVStream *st,
3916  uint32_t value, int flags)
3917 {
3918  AVTimecode tc;
3919  char buf[AV_TIMECODE_STR_SIZE];
3920  AVRational rate = {st->codec->time_base.den,
3921  st->codec->time_base.num};
3922  int ret = av_timecode_init(&tc, rate, flags, 0, s);
3923  if (ret < 0)
3924  return ret;
3925  av_dict_set(&st->metadata, "timecode",
3926  av_timecode_make_string(&tc, buf, value), 0);
3927  return 0;
3928 }
3929 
3930 static int mov_read_timecode_track(AVFormatContext *s, AVStream *st)
3931 {
3932  MOVStreamContext *sc = st->priv_data;
3933  int flags = 0;
3934  int64_t cur_pos = avio_tell(sc->pb);
3935  uint32_t value;
3936 
3937  if (!st->nb_index_entries)
3938  return -1;
3939 
3940  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3941  value = avio_rb32(s->pb);
3942 
3943  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3944  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3945  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3946 
3947  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3948  * not the case) and thus assume "frame number format" instead of QT one.
3949  * No sample with tmcd track can be found with a QT timecode at the moment,
3950  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3951  * format). */
3952  parse_timecode_in_framenum_format(s, st, value, flags);
3953 
3954  avio_seek(sc->pb, cur_pos, SEEK_SET);
3955  return 0;
3956 }
3957 
3958 static int mov_read_close(AVFormatContext *s)
3959 {
3960  MOVContext *mov = s->priv_data;
3961  int i, j;
3962 
3963  for (i = 0; i < s->nb_streams; i++) {
3964  AVStream *st = s->streams[i];
3965  MOVStreamContext *sc = st->priv_data;
3966 
3967  av_freep(&sc->ctts_data);
3968  for (j = 0; j < sc->drefs_count; j++) {
3969  av_freep(&sc->drefs[j].path);
3970  av_freep(&sc->drefs[j].dir);
3971  }
3972  av_freep(&sc->drefs);
3973 
3974  sc->drefs_count = 0;
3975 
3976  if (!sc->pb_is_copied)
3977  avio_closep(&sc->pb);
3978 
3979  sc->pb = NULL;
3980  av_freep(&sc->chunk_offsets);
3981  av_freep(&sc->stsc_data);
3982  av_freep(&sc->sample_sizes);
3983  av_freep(&sc->keyframes);
3984  av_freep(&sc->stts_data);
3985  av_freep(&sc->stps_data);
3986  av_freep(&sc->elst_data);
3987  av_freep(&sc->rap_group);
3988  av_freep(&sc->display_matrix);
3989  }
3990 
3991  if (mov->dv_demux) {
3992  avformat_free_context(mov->dv_fctx);
3993  mov->dv_fctx = NULL;
3994  }
3995 
3996  av_freep(&mov->trex_data);
3997  av_freep(&mov->bitrates);
3998 
3999  for (i = 0; i < mov->fragment_index_count; i++) {
4000  MOVFragmentIndex* index = mov->fragment_index_data[i];
4001  av_freep(&index->items);
4002  av_freep(&mov->fragment_index_data[i]);
4003  }
4004  av_freep(&mov->fragment_index_data);
4005 
4006  return 0;
4007 }
4008 
4009 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
4010 {
4011  int i;
4012 
4013  for (i = 0; i < s->nb_streams; i++) {
4014  AVStream *st = s->streams[i];
4015  MOVStreamContext *sc = st->priv_data;
4016 
4017  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
4018  sc->timecode_track == tmcd_id)
4019  return 1;
4020  }
4021  return 0;
4022 }
4023 
4024 /* look for a tmcd track not referenced by any video track, and export it globally */
4025 static void export_orphan_timecode(AVFormatContext *s)
4026 {
4027  int i;
4028 
4029  for (i = 0; i < s->nb_streams; i++) {
4030  AVStream *st = s->streams[i];
4031 
4032  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
4033  !tmcd_is_referenced(s, i + 1)) {
4034  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
4035  if (tcr) {
4036  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
4037  break;
4038  }
4039  }
4040  }
4041 }
4042 
4043 static int read_tfra(MOVContext *mov, AVIOContext *f)
4044 {
4045  MOVFragmentIndex* index = NULL;
4046  int version, fieldlength, i, j;
4047  int64_t pos = avio_tell(f);
4048  uint32_t size = avio_rb32(f);
4049  void *tmp;
4050 
4051  if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a')) {
4052  return 1;
4053  }
4054  av_log(mov->fc, AV_LOG_VERBOSE, "found tfra\n");
4055  index = av_mallocz(sizeof(MOVFragmentIndex));
4056  if (!index) {
4057  return AVERROR(ENOMEM);
4058  }
4059 
4060  tmp = av_realloc_array(mov->fragment_index_data,
4061  mov->fragment_index_count + 1,
4062  sizeof(MOVFragmentIndex*));
4063  if (!tmp) {
4064  av_freep(&index);
4065  return AVERROR(ENOMEM);
4066  }
4067  mov->fragment_index_data = tmp;
4068  mov->fragment_index_data[mov->fragment_index_count++] = index;
4069 
4070  version = avio_r8(f);
4071  avio_rb24(f);
4072  index->track_id = avio_rb32(f);
4073  fieldlength = avio_rb32(f);
4074  index->item_count = avio_rb32(f);
4075  index->items = av_mallocz_array(
4076  index->item_count, sizeof(MOVFragmentIndexItem));
4077  if (!index->items) {
4078  index->item_count = 0;
4079  return AVERROR(ENOMEM);
4080  }
4081  for (i = 0; i < index->item_count; i++) {
4082  int64_t time, offset;
4083  if (version == 1) {
4084  time = avio_rb64(f);
4085  offset = avio_rb64(f);
4086  } else {
4087  time = avio_rb32(f);
4088  offset = avio_rb32(f);
4089  }
4090  index->items[i].time = time;
4091  index->items[i].moof_offset = offset;
4092  for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
4093  avio_r8(f);
4094  for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
4095  avio_r8(f);
4096  for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
4097  avio_r8(f);
4098  }
4099 
4100  avio_seek(f, pos + size, SEEK_SET);
4101  return 0;
4102 }
4103 
4104 static int mov_read_mfra(MOVContext *c, AVIOContext *f)
4105 {
4106  int64_t stream_size = avio_size(f);
4107  int64_t original_pos = avio_tell(f);
4108  int64_t seek_ret;
4109  int32_t mfra_size;
4110  int ret = -1;
4111  if ((seek_ret = avio_seek(f, stream_size - 4, SEEK_SET)) < 0) {
4112  ret = seek_ret;
4113  goto fail;
4114  }
4115  mfra_size = avio_rb32(f);
4116  if (mfra_size < 0 || mfra_size > stream_size) {
4117  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (unreasonable size)\n");
4118  goto fail;
4119  }
4120  if ((seek_ret = avio_seek(f, -mfra_size, SEEK_CUR)) < 0) {
4121  ret = seek_ret;
4122  goto fail;
4123  }
4124  if (avio_rb32(f) != mfra_size) {
4125  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (size mismatch)\n");
4126  goto fail;
4127  }
4128  if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
4129  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (tag mismatch)\n");
4130  goto fail;
4131  }
4132  av_log(c->fc, AV_LOG_VERBOSE, "stream has mfra\n");
4133  do {
4134  ret = read_tfra(c, f);
4135  if (ret < 0)
4136  goto fail;
4137  } while (!ret);
4138  ret = 0;
4139 fail:
4140  seek_ret = avio_seek(f, original_pos, SEEK_SET);
4141  if (seek_ret < 0) {
4142  av_log(c->fc, AV_LOG_ERROR,
4143  "failed to seek back after looking for mfra\n");
4144  ret = seek_ret;
4145  }
4146  return ret;
4147 }
4148 
4149 static int mov_read_header(AVFormatContext *s)
4150 {
4151  MOVContext *mov = s->priv_data;
4152  AVIOContext *pb = s->pb;
4153  int j, err;
4154  MOVAtom atom = { AV_RL32("root") };
4155  int i;
4156 
4157  mov->fc = s;
4158  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
4159  if (pb->seekable)
4160  atom.size = avio_size(pb);
4161  else
4162  atom.size = INT64_MAX;
4163 
4164  /* check MOV header */
4165  do {
4166  if (mov->moov_retry)
4167  avio_seek(pb, 0, SEEK_SET);
4168  if ((err = mov_read_default(mov, pb, atom)) < 0) {
4169  av_log(s, AV_LOG_ERROR, "error reading header\n");
4170  mov_read_close(s);
4171  return err;
4172  }
4173  } while (pb->seekable && !mov->found_moov && !mov->moov_retry++);
4174  if (!mov->found_moov) {
4175  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
4176  mov_read_close(s);
4177  return AVERROR_INVALIDDATA;
4178  }
4179  av_log(mov->fc, AV_LOG_TRACE, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
4180 
4181  if (pb->seekable) {
4182  if (mov->chapter_track > 0)
4183  mov_read_chapters(s);
4184  for (i = 0; i < s->nb_streams; i++)
4185  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
4186  mov_read_timecode_track(s, s->streams[i]);
4187  }
4188 
4189  /* copy timecode metadata from tmcd tracks to the related video streams */
4190  for (i = 0; i < s->nb_streams; i++) {
4191  AVStream *st = s->streams[i];
4192  MOVStreamContext *sc = st->priv_data;
4193  if (sc->timecode_track > 0) {
4194  AVDictionaryEntry *tcr;
4195  int tmcd_st_id = -1;
4196 
4197  for (j = 0; j < s->nb_streams; j++)
4198  if (s->streams[j]->id == sc->timecode_track)
4199  tmcd_st_id = j;
4200 
4201  if (tmcd_st_id < 0 || tmcd_st_id == i)
4202  continue;
4203  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
4204  if (tcr)
4205  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
4206  }
4207  }
4208  export_orphan_timecode(s);
4209 
4210  for (i = 0; i < s->nb_streams; i++) {
4211  AVStream *st = s->streams[i];
4212  MOVStreamContext *sc = st->priv_data;
4213  fix_timescale(mov, sc);
4214  if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_AAC) {
4215  st->skip_samples = sc->start_pad;
4216  }
4217  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
4218  av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
4219  sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
4220  if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
4221  if (st->codec->width <= 0 || st->codec->height <= 0) {
4222  st->codec->width = sc->width;
4223  st->codec->height = sc->height;
4224  }
4225  if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
4226  if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
4227  return err;
4228  }
4229  }
4230  }
4231 
4232  if (mov->trex_data) {
4233  for (i = 0; i < s->nb_streams; i++) {
4234  AVStream *st = s->streams[i];
4235  MOVStreamContext *sc = st->priv_data;
4236  if (st->duration > 0)
4237  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
4238  }
4239  }
4240 
4241  if (mov->use_mfra_for > 0) {
4242  for (i = 0; i < s->nb_streams; i++) {
4243  AVStream *st = s->streams[i];
4244  MOVStreamContext *sc = st->priv_data;
4245  if (sc->duration_for_fps > 0) {
4246  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale /
4247  sc->duration_for_fps;
4248  }
4249  }
4250  }
4251 
4252  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
4253  if (mov->bitrates[i]) {
4254  s->streams[i]->codec->bit_rate = mov->bitrates[i];
4255  }
4256  }
4257 
4258  ff_rfps_calculate(s);
4259 
4260  for (i = 0; i < s->nb_streams; i++) {
4261  AVStream *st = s->streams[i];
4262  MOVStreamContext *sc = st->priv_data;
4263 
4264  switch (st->codec->codec_type) {
4265  case AVMEDIA_TYPE_AUDIO:
4266  err = ff_replaygain_export(st, s->metadata);
4267  if (err < 0) {
4268  mov_read_close(s);
4269  return err;
4270  }
4271  break;
4272  case AVMEDIA_TYPE_VIDEO:
4273  if (sc->display_matrix) {
4274  AVPacketSideData *sd, *tmp;
4275 
4276  tmp = av_realloc_array(st->side_data,
4277  st->nb_side_data + 1, sizeof(*tmp));
4278  if (!tmp)
4279  return AVERROR(ENOMEM);
4280 
4281  st->side_data = tmp;
4282  st->nb_side_data++;
4283 
4284  sd = &st->side_data[st->nb_side_data - 1];
4285  sd->type = AV_PKT_DATA_DISPLAYMATRIX;
4286  sd->size = sizeof(int32_t) * 9;
4287  sd->data = (uint8_t*)sc->display_matrix;
4288  sc->display_matrix = NULL;
4289  }
4290  break;
4291  }
4292  }
4293 
4294  return 0;
4295 }
4296 
4297 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
4298 {
4299  AVIndexEntry *sample = NULL;
4300  int64_t best_dts = INT64_MAX;
4301  int i;
4302  for (i = 0; i < s->nb_streams; i++) {
4303  AVStream *avst = s->streams[i];
4304  MOVStreamContext *msc = avst->priv_data;
4305  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
4306  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
4307  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
4308  av_log(s, AV_LOG_TRACE, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
4309  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
4310  (s->pb->seekable &&
4311  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
4312  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
4313  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
4314  sample = current_sample;
4315  best_dts = dts;
4316  *st = avst;
4317  }
4318  }
4319  }
4320  return sample;
4321 }
4322 
4323 static int should_retry(AVIOContext *pb, int error_code) {
4324  if (error_code == AVERROR_EOF || avio_feof(pb))
4325  return 0;
4326 
4327  return 1;
4328 }
4329 
4330 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
4331 {
4332  MOVContext *mov = s->priv_data;
4333  MOVStreamContext *sc;
4334  AVIndexEntry *sample;
4335  AVStream *st = NULL;
4336  int ret;
4337  mov->fc = s;
4338  retry:
4339  sample = mov_find_next_sample(s, &st);
4340  if (!sample) {
4341  mov->found_mdat = 0;
4342  if (!mov->next_root_atom)
4343  return AVERROR_EOF;
4344  if (avio_seek(s->pb, mov->next_root_atom, SEEK_SET) != mov->next_root_atom) {
4345  av_log(mov->fc, AV_LOG_ERROR, "next root atom offset 0x%"PRIx64": partial file\n", mov->next_root_atom);
4346  return AVERROR_INVALIDDATA;
4347  }
4348  mov->next_root_atom = 0;
4349  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
4350  avio_feof(s->pb))
4351  return AVERROR_EOF;
4352  av_log(s, AV_LOG_TRACE, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
4353  goto retry;
4354  }
4355  sc = st->priv_data;
4356  /* must be done just before reading, to avoid infinite loop on sample */
4357  sc->current_sample++;
4358 
4359  if (mov->next_root_atom) {
4360  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
4361  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
4362  }
4363 
4364  if (st->discard != AVDISCARD_ALL) {
4365  int64_t ret64 = avio_seek(sc->pb, sample->pos, SEEK_SET);
4366  if (ret64 != sample->pos) {
4367  av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
4368  sc->ffindex, sample->pos);
4369  sc->current_sample -= should_retry(sc->pb, ret64);
4370  return AVERROR_INVALIDDATA;
4371  }
4372  ret = av_get_packet(sc->pb, pkt, sample->size);
4373  if (ret < 0) {
4374  sc->current_sample -= should_retry(sc->pb, ret);
4375  return ret;
4376  }
4377  if (sc->has_palette) {
4378  uint8_t *pal;
4379 
4380  pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
4381  if (!pal) {
4382  av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
4383  } else {
4384  memcpy(pal, sc->palette, AVPALETTE_SIZE);
4385  sc->has_palette = 0;
4386  }
4387  }
4388 #if CONFIG_DV_DEMUXER
4389  if (mov->dv_demux && sc->dv_audio_container) {
4390  avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
4391  av_freep(&pkt->data);
4392  pkt->size = 0;
4393  ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
4394  if (ret < 0)
4395  return ret;
4396  }
4397 #endif
4398  }
4399 
4400  pkt->stream_index = sc->ffindex;
4401  pkt->dts = sample->timestamp;
4402  if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
4403  pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
4404  /* update ctts context */
4405  sc->ctts_sample++;
4406  if (sc->ctts_index < sc->ctts_count &&
4407  sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
4408  sc->ctts_index++;
4409  sc->ctts_sample = 0;
4410  }
4411  if (sc->wrong_dts)
4412  pkt->dts = AV_NOPTS_VALUE;
4413  } else {
4414  int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
4415  st->index_entries[sc->current_sample].timestamp : st->duration;
4416  pkt->duration = next_dts - pkt->dts;
4417  pkt->pts = pkt->dts;
4418  }
4419  if (st->discard == AVDISCARD_ALL)
4420  goto retry;
4421  pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
4422  pkt->pos = sample->pos;
4423 
4424  return 0;
4425 }
4426 
4427 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
4428 {
4429  MOVStreamContext *sc = st->priv_data;
4430  int sample, time_sample;
4431  int i;
4432 
4433  sample = av_index_search_timestamp(st, timestamp, flags);
4434  av_log(s, AV_LOG_TRACE, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
4435  if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
4436  sample = 0;
4437  if (sample < 0) /* not sure what to do */
4438  return AVERROR_INVALIDDATA;
4439  sc->current_sample = sample;
4440  av_log(s, AV_LOG_TRACE, "stream %d, found sample %d\n", st->index, sc->current_sample);
4441  /* adjust ctts index */
4442  if (sc->ctts_data) {
4443  time_sample = 0;
4444  for (i = 0; i < sc->ctts_count; i++) {
4445  int next = time_sample + sc->ctts_data[i].count;
4446  if (next > sc->current_sample) {
4447  sc->ctts_index = i;
4448  sc->ctts_sample = sc->current_sample - time_sample;
4449  break;
4450  }
4451  time_sample = next;
4452  }
4453  }
4454  return sample;
4455 }
4456 
4457 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
4458 {
4459  MOVContext *mc = s->priv_data;
4460  AVStream *st;
4461  int sample;
4462  int i;
4463 
4464  if (stream_index >= s->nb_streams)
4465  return AVERROR_INVALIDDATA;
4466 
4467  st = s->streams[stream_index];
4468  sample = mov_seek_stream(s, st, sample_time, flags);
4469  if (sample < 0)
4470  return sample;
4471 
4472  if (mc->seek_individually) {
4473  /* adjust seek timestamp to found sample timestamp */
4474  int64_t seek_timestamp = st->index_entries[sample].timestamp;
4475 
4476  for (i = 0; i < s->nb_streams; i++) {
4477  int64_t timestamp;
4478  MOVStreamContext *sc = s->streams[i]->priv_data;
4479  st = s->streams[i];
4480  st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
4481 
4482  if (stream_index == i)
4483  continue;
4484 
4485  timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
4486  mov_seek_stream(s, st, timestamp, flags);
4487  }
4488  } else {
4489  for (i = 0; i < s->nb_streams; i++) {
4490  MOVStreamContext *sc;
4491  st = s->streams[i];
4492  sc = st->priv_data;
4493  sc->current_sample = 0;
4494  }
4495  while (1) {
4496  MOVStreamContext *sc;
4497  AVIndexEntry *entry = mov_find_next_sample(s, &st);
4498  if (!entry)
4499  return AVERROR_INVALIDDATA;
4500  sc = st->priv_data;
4501  if (sc->ffindex == stream_index && sc->current_sample == sample)
4502  break;
4503  sc->current_sample++;
4504  }
4505  }
4506  return 0;
4507 }
4508 
4509 #define OFFSET(x) offsetof(MOVContext, x)
4510 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
4511 static const AVOption mov_options[] = {
4512  {"use_absolute_path",
4513  "allow using absolute path when opening alias, this is a possible security issue",
4514  OFFSET(use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
4515  0, 1, FLAGS},
4516  {"seek_streams_individually",
4517  "Seek each stream individually to the to the closest point",
4518  OFFSET(seek_individually), AV_OPT_TYPE_INT, { .i64 = 1 },
4519  0, 1, FLAGS},
4520  {"ignore_editlist", "", OFFSET(ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
4521  0, 1, FLAGS},
4522  {"use_mfra_for",
4523  "use mfra for fragment timestamps",
4524  OFFSET(use_mfra_for), FF_OPT_TYPE_INT, {.i64 = FF_MOV_FLAG_MFRA_AUTO},
4525  -1, FF_MOV_FLAG_MFRA_PTS, FLAGS,
4526  "use_mfra_for"},
4527  {"auto", "auto", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_AUTO}, 0, 0,
4528  FLAGS, "use_mfra_for" },
4529  {"dts", "dts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_DTS}, 0, 0,
4530  FLAGS, "use_mfra_for" },