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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/internal.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/intfloat.h"
35 #include "libavutil/mathematics.h"
36 #include "libavutil/time_internal.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/display.h"
40 #include "libavutil/opt.h"
41 #include "libavutil/aes.h"
42 #include "libavutil/sha.h"
43 #include "libavutil/timecode.h"
44 #include "libavcodec/ac3tab.h"
45 #include "avformat.h"
46 #include "internal.h"
47 #include "avio_internal.h"
48 #include "riff.h"
49 #include "isom.h"
50 #include "libavcodec/get_bits.h"
51 #include "id3v1.h"
52 #include "mov_chan.h"
53 #include "replaygain.h"
54 
55 #if CONFIG_ZLIB
56 #include <zlib.h>
57 #endif
58 
59 #include "qtpalette.h"
60 
61 /* those functions parse an atom */
62 /* links atom IDs to parse functions */
63 typedef struct MOVParseTableEntry {
64  uint32_t type;
65  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
66 } MOVParseTableEntry;
67 
68 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
69 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
70 
71 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
72  unsigned len, const char *key)
73 {
74  char buf[16];
75 
76  short current, total = 0;
77  avio_rb16(pb); // unknown
78  current = avio_rb16(pb);
79  if (len >= 6)
80  total = avio_rb16(pb);
81  if (!total)
82  snprintf(buf, sizeof(buf), "%d", current);
83  else
84  snprintf(buf, sizeof(buf), "%d/%d", current, total);
85  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
86  av_dict_set(&c->fc->metadata, key, buf, 0);
87 
88  return 0;
89 }
90 
91 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
92  unsigned len, const char *key)
93 {
94  /* bypass padding bytes */
95  avio_r8(pb);
96  avio_r8(pb);
97  avio_r8(pb);
98 
99  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
100  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
101 
102  return 0;
103 }
104 
105 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
106  unsigned len, const char *key)
107 {
108  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
109  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
110 
111  return 0;
112 }
113 
114 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
115  unsigned len, const char *key)
116 {
117  short genre;
118 
119  avio_r8(pb); // unknown
120 
121  genre = avio_r8(pb);
122  if (genre < 1 || genre > ID3v1_GENRE_MAX)
123  return 0;
124  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
125  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
126 
127  return 0;
128 }
129 
130 static const uint32_t mac_to_unicode[128] = {
131  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
132  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
133  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
134  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
135  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
136  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
137  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
138  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
139  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
140  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
141  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
142  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
143  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
144  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
145  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
146  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
147 };
148 
149 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
150  char *dst, int dstlen)
151 {
152  char *p = dst;
153  char *end = dst+dstlen-1;
154  int i;
155 
156  for (i = 0; i < len; i++) {
157  uint8_t t, c = avio_r8(pb);
158  if (c < 0x80 && p < end)
159  *p++ = c;
160  else if (p < end)
161  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
162  }
163  *p = 0;
164  return p - dst;
165 }
166 
167 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
168 {
169  AVPacket pkt;
170  AVStream *st;
171  MOVStreamContext *sc;
172  enum AVCodecID id;
173  int ret;
174 
175  switch (type) {
176  case 0xd: id = AV_CODEC_ID_MJPEG; break;
177  case 0xe: id = AV_CODEC_ID_PNG; break;
178  case 0x1b: id = AV_CODEC_ID_BMP; break;
179  default:
180  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
181  avio_skip(pb, len);
182  return 0;
183  }
184 
185  st = avformat_new_stream(c->fc, NULL);
186  if (!st)
187  return AVERROR(ENOMEM);
188  sc = av_mallocz(sizeof(*sc));
189  if (!sc)
190  return AVERROR(ENOMEM);
191  st->priv_data = sc;
192 
193  ret = av_get_packet(pb, &pkt, len);
194  if (ret < 0)
195  return ret;
196 
197  st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
198 
199  st->attached_pic = pkt;
200  st->attached_pic.stream_index = st->index;
201  st->attached_pic.flags |= AV_PKT_FLAG_KEY;
202 
203  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
204  st->codec->codec_id = id;
205 
206  return 0;
207 }
208 
209 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
210 {
211  char language[4] = { 0 };
212  char buf[200], place[100];
213  uint16_t langcode = 0;
214  double longitude, latitude, altitude;
215  const char *key = "location";
216 
217  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
218  av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
219  return AVERROR_INVALIDDATA;
220  }
221 
222  avio_skip(pb, 4); // version+flags
223  langcode = avio_rb16(pb);
224  ff_mov_lang_to_iso639(langcode, language);
225  len -= 6;
226 
227  len -= avio_get_str(pb, len, place, sizeof(place));
228  if (len < 1) {
229  av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
230  return AVERROR_INVALIDDATA;
231  }
232  avio_skip(pb, 1); // role
233  len -= 1;
234 
235  if (len < 12) {
236  av_log(c->fc, AV_LOG_ERROR, "no space for coordinates left (%d)\n", len);
237  return AVERROR_INVALIDDATA;
238  }
239  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
240  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
241  altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
242 
243  // Try to output in the same format as the ?xyz field
244  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
245  if (altitude)
246  av_strlcatf(buf, sizeof(buf), "%+f", altitude);
247  av_strlcatf(buf, sizeof(buf), "/%s", place);
248 
249  if (*language && strcmp(language, "und")) {
250  char key2[16];
251  snprintf(key2, sizeof(key2), "%s-%s", key, language);
252  av_dict_set(&c->fc->metadata, key2, buf, 0);
253  }
254  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
255  return av_dict_set(&c->fc->metadata, key, buf, 0);
256 }
257 
258 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
259 {
260  char tmp_key[5];
261  char key2[32], language[4] = {0};
262  char *str = NULL;
263  const char *key = NULL;
264  uint16_t langcode = 0;
265  uint32_t data_type = 0, str_size, str_size_alloc;
266  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
267  int raw = 0;
268 
269  switch (atom.type) {
270  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
271  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
272  case MKTAG( 'X','M','P','_'):
273  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
274  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
275  case MKTAG( 'a','k','I','D'): key = "account_type";
276  parse = mov_metadata_int8_no_padding; break;
277  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
278  case MKTAG( 'c','a','t','g'): key = "category"; break;
279  case MKTAG( 'c','p','i','l'): key = "compilation";
280  parse = mov_metadata_int8_no_padding; break;
281  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
282  case MKTAG( 'd','e','s','c'): key = "description"; break;
283  case MKTAG( 'd','i','s','k'): key = "disc";
284  parse = mov_metadata_track_or_disc_number; break;
285  case MKTAG( 'e','g','i','d'): key = "episode_uid";
286  parse = mov_metadata_int8_no_padding; break;
287  case MKTAG( 'g','n','r','e'): key = "genre";
288  parse = mov_metadata_gnre; break;
289  case MKTAG( 'h','d','v','d'): key = "hd_video";
290  parse = mov_metadata_int8_no_padding; break;
291  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
292  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
293  case MKTAG( 'l','o','c','i'):
294  return mov_metadata_loci(c, pb, atom.size);
295  case MKTAG( 'p','c','s','t'): key = "podcast";
296  parse = mov_metadata_int8_no_padding; break;
297  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
298  parse = mov_metadata_int8_no_padding; break;
299  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
300  case MKTAG( 'r','t','n','g'): key = "rating";
301  parse = mov_metadata_int8_no_padding; break;
302  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
303  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
304  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
305  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
306  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
307  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
308  case MKTAG( 's','t','i','k'): key = "media_type";
309  parse = mov_metadata_int8_no_padding; break;
310  case MKTAG( 't','r','k','n'): key = "track";
311  parse = mov_metadata_track_or_disc_number; break;
312  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
313  case MKTAG( 't','v','e','s'): key = "episode_sort";
314  parse = mov_metadata_int8_bypass_padding; break;
315  case MKTAG( 't','v','n','n'): key = "network"; break;
316  case MKTAG( 't','v','s','h'): key = "show"; break;
317  case MKTAG( 't','v','s','n'): key = "season_number";
318  parse = mov_metadata_int8_bypass_padding; break;
319  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
320  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
321  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
322  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
323  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
324  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
325  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
326  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
327  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
328  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
329  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
330  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
331  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
332  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
333  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
334  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
335  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
336  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
337  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
338  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
339  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
340  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
341  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
342  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
343  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
344  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
345  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
346  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
347  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
348  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
349  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
350  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
351  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
352  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
353  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
354  }
355 retry:
356  if (c->itunes_metadata && atom.size > 8) {
357  int data_size = avio_rb32(pb);
358  int tag = avio_rl32(pb);
359  if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
360  data_type = avio_rb32(pb); // type
361  avio_rb32(pb); // unknown
362  str_size = data_size - 16;
363  atom.size -= 16;
364 
365  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
366  int ret = mov_read_covr(c, pb, data_type, str_size);
367  if (ret < 0) {
368  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
369  }
370  return ret;
371  }
372  } else return 0;
373  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
374  str_size = avio_rb16(pb); // string length
375  if (str_size > atom.size) {
376  raw = 1;
377  avio_seek(pb, -2, SEEK_CUR);
378  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
379  goto retry;
380  }
381  langcode = avio_rb16(pb);
382  ff_mov_lang_to_iso639(langcode, language);
383  atom.size -= 4;
384  } else
385  str_size = atom.size;
386 
387  if (c->export_all && !key) {
388  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
389  key = tmp_key;
390  }
391 
392  if (!key)
393  return 0;
394  if (atom.size < 0 || str_size >= INT_MAX/2)
395  return AVERROR_INVALIDDATA;
396 
397  // worst-case requirement for output string in case of utf8 coded input
398  str_size_alloc = (raw ? str_size : str_size * 2) + 1;
399  str = av_mallocz(str_size_alloc);
400  if (!str)
401  return AVERROR(ENOMEM);
402 
403  if (parse)
404  parse(c, pb, str_size, key);
405  else {
406  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
407  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
408  } else {
409  int ret = ffio_read_size(pb, str, str_size);
410  if (ret < 0) {
411  av_free(str);
412  return ret;
413  }
414  str[str_size] = 0;
415  }
416  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
417  av_dict_set(&c->fc->metadata, key, str, 0);
418  if (*language && strcmp(language, "und")) {
419  snprintf(key2, sizeof(key2), "%s-%s", key, language);
420  av_dict_set(&c->fc->metadata, key2, str, 0);
421  }
422  }
423  av_log(c->fc, AV_LOG_TRACE, "lang \"%3s\" ", language);
424  av_log(c->fc, AV_LOG_TRACE, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
425  key, str, (char*)&atom.type, str_size_alloc, atom.size);
426 
427  av_freep(&str);
428  return 0;
429 }
430 
431 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
432 {
433  int64_t start;
434  int i, nb_chapters, str_len, version;
435  char str[256+1];
436  int ret;
437 
438  if ((atom.size -= 5) < 0)
439  return 0;
440 
441  version = avio_r8(pb);
442  avio_rb24(pb);
443  if (version)
444  avio_rb32(pb); // ???
445  nb_chapters = avio_r8(pb);
446 
447  for (i = 0; i < nb_chapters; i++) {
448  if (atom.size < 9)
449  return 0;
450 
451  start = avio_rb64(pb);
452  str_len = avio_r8(pb);
453 
454  if ((atom.size -= 9+str_len) < 0)
455  return 0;
456 
457  ret = ffio_read_size(pb, str, str_len);
458  if (ret < 0)
459  return ret;
460  str[str_len] = 0;
461  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
462  }
463  return 0;
464 }
465 
466 #define MIN_DATA_ENTRY_BOX_SIZE 12
467 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
468 {
469  AVStream *st;
470  MOVStreamContext *sc;
471  int entries, i, j;
472 
473  if (c->fc->nb_streams < 1)
474  return 0;
475  st = c->fc->streams[c->fc->nb_streams-1];
476  sc = st->priv_data;
477 
478  avio_rb32(pb); // version + flags
479  entries = avio_rb32(pb);
480  if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
481  entries >= UINT_MAX / sizeof(*sc->drefs))
482  return AVERROR_INVALIDDATA;
483  av_free(sc->drefs);
484  sc->drefs_count = 0;
485  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
486  if (!sc->drefs)
487  return AVERROR(ENOMEM);
488  sc->drefs_count = entries;
489 
490  for (i = 0; i < sc->drefs_count; i++) {
491  MOVDref *dref = &sc->drefs[i];
492  uint32_t size = avio_rb32(pb);
493  int64_t next = avio_tell(pb) + size - 4;
494 
495  if (size < 12)
496  return AVERROR_INVALIDDATA;
497 
498  dref->type = avio_rl32(pb);
499  avio_rb32(pb); // version + flags
500  av_log(c->fc, AV_LOG_TRACE, "type %.4s size %d\n", (char*)&dref->type, size);
501 
502  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
503  /* macintosh alias record */
504  uint16_t volume_len, len;
505  int16_t type;
506  int ret;
507 
508  avio_skip(pb, 10);
509 
510  volume_len = avio_r8(pb);
511  volume_len = FFMIN(volume_len, 27);
512  ret = ffio_read_size(pb, dref->volume, 27);
513  if (ret < 0)
514  return ret;
515  dref->volume[volume_len] = 0;
516  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
517 
518  avio_skip(pb, 12);
519 
520  len = avio_r8(pb);
521  len = FFMIN(len, 63);
522  ret = ffio_read_size(pb, dref->filename, 63);
523  if (ret < 0)
524  return ret;
525  dref->filename[len] = 0;
526  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
527 
528  avio_skip(pb, 16);
529 
530  /* read next level up_from_alias/down_to_target */
531  dref->nlvl_from = avio_rb16(pb);
532  dref->nlvl_to = avio_rb16(pb);
533  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
534  dref->nlvl_from, dref->nlvl_to);
535 
536  avio_skip(pb, 16);
537 
538  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
539  if(avio_feof(pb))
540  return AVERROR_EOF;
541  type = avio_rb16(pb);
542  len = avio_rb16(pb);
543  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
544  if (len&1)
545  len += 1;
546  if (type == 2 || type == 18) { // absolute path
547  av_free(dref->path);
548  dref->path = av_mallocz(len+1);
549  if (!dref->path)
550  return AVERROR(ENOMEM);
551 
552  ret = ffio_read_size(pb, dref->path, len);
553  if (ret < 0) {
554  av_freep(&dref->path);
555  return ret;
556  }
557  if (type == 18) // no additional processing needed
558  continue;
559  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
560  len -= volume_len;
561  memmove(dref->path, dref->path+volume_len, len);
562  dref->path[len] = 0;
563  }
564  for (j = 0; j < len; j++)
565  if (dref->path[j] == ':')
566  dref->path[j] = '/';
567  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
568  } else if (type == 0) { // directory name
569  av_free(dref->dir);
570  dref->dir = av_malloc(len+1);
571  if (!dref->dir)
572  return AVERROR(ENOMEM);
573 
574  ret = ffio_read_size(pb, dref->dir, len);
575  if (ret < 0) {
576  av_freep(&dref->dir);
577  return ret;
578  }
579  dref->dir[len] = 0;
580  for (j = 0; j < len; j++)
581  if (dref->dir[j] == ':')
582  dref->dir[j] = '/';
583  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
584  } else
585  avio_skip(pb, len);
586  }
587  }
588  avio_seek(pb, next, SEEK_SET);
589  }
590  return 0;
591 }
592 
593 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
594 {
595  AVStream *st;
596  uint32_t type;
597  uint32_t av_unused ctype;
598  int64_t title_size;
599  char *title_str;
600  int ret;
601 
602  if (c->fc->nb_streams < 1) // meta before first trak
603  return 0;
604 
605  st = c->fc->streams[c->fc->nb_streams-1];
606 
607  avio_r8(pb); /* version */
608  avio_rb24(pb); /* flags */
609 
610  /* component type */
611  ctype = avio_rl32(pb);
612  type = avio_rl32(pb); /* component subtype */
613 
614  av_log(c->fc, AV_LOG_TRACE, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
615  av_log(c->fc, AV_LOG_TRACE, "stype= %.4s\n", (char*)&type);
616 
617  if (type == MKTAG('v','i','d','e'))
618  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
619  else if (type == MKTAG('s','o','u','n'))
620  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
621  else if (type == MKTAG('m','1','a',' '))
622  st->codec->codec_id = AV_CODEC_ID_MP2;
623  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
624  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
625 
626  avio_rb32(pb); /* component manufacture */
627  avio_rb32(pb); /* component flags */
628  avio_rb32(pb); /* component flags mask */
629 
630  title_size = atom.size - 24;
631  if (title_size > 0) {
632  title_str = av_malloc(title_size + 1); /* Add null terminator */
633  if (!title_str)
634  return AVERROR(ENOMEM);
635 
636  ret = ffio_read_size(pb, title_str, title_size);
637  if (ret < 0) {
638  av_freep(&title_str);
639  return ret;
640  }
641  title_str[title_size] = 0;
642  if (title_str[0]) {
643  int off = (!c->isom && title_str[0] == title_size - 1);
644  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
645  }
646  av_freep(&title_str);
647  }
648 
649  return 0;
650 }
651 
652 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
653 {
654  AVStream *st;
655  int tag;
656 
657  if (fc->nb_streams < 1)
658  return 0;
659  st = fc->streams[fc->nb_streams-1];
660 
661  avio_rb32(pb); /* version + flags */
662  ff_mp4_read_descr(fc, pb, &tag);
663  if (tag == MP4ESDescrTag) {
664  ff_mp4_parse_es_descr(pb, NULL);
665  } else
666  avio_rb16(pb); /* ID */
667 
668  ff_mp4_read_descr(fc, pb, &tag);
669  if (tag == MP4DecConfigDescrTag)
670  ff_mp4_read_dec_config_descr(fc, st, pb);
671  return 0;
672 }
673 
674 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
675 {
676  return ff_mov_read_esds(c->fc, pb);
677 }
678 
679 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
680 {
681  AVStream *st;
682  enum AVAudioServiceType *ast;
683  int ac3info, acmod, lfeon, bsmod;
684 
685  if (c->fc->nb_streams < 1)
686  return 0;
687  st = c->fc->streams[c->fc->nb_streams-1];
688 
689  ast = (enum AVAudioServiceType*)ff_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
690  sizeof(*ast));
691  if (!ast)
692  return AVERROR(ENOMEM);
693 
694  ac3info = avio_rb24(pb);
695  bsmod = (ac3info >> 14) & 0x7;
696  acmod = (ac3info >> 11) & 0x7;
697  lfeon = (ac3info >> 10) & 0x1;
698  st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
699  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
700  if (lfeon)
701  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
702  *ast = bsmod;
703  if (st->codec->channels > 1 && bsmod == 0x7)
704  *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
705 
706  st->codec->audio_service_type = *ast;
707 
708  return 0;
709 }
710 
711 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
712 {
713  AVStream *st;
714  enum AVAudioServiceType *ast;
715  int eac3info, acmod, lfeon, bsmod;
716 
717  if (c->fc->nb_streams < 1)
718  return 0;
719  st = c->fc->streams[c->fc->nb_streams-1];
720 
721  ast = (enum AVAudioServiceType*)ff_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
722  sizeof(*ast));
723  if (!ast)
724  return AVERROR(ENOMEM);
725 
726  /* No need to parse fields for additional independent substreams and its
727  * associated dependent substreams since libavcodec's E-AC-3 decoder
728  * does not support them yet. */
729  avio_rb16(pb); /* data_rate and num_ind_sub */
730  eac3info = avio_rb24(pb);
731  bsmod = (eac3info >> 12) & 0x1f;
732  acmod = (eac3info >> 9) & 0x7;
733  lfeon = (eac3info >> 8) & 0x1;
734  st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
735  if (lfeon)
736  st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
737  st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
738  *ast = bsmod;
739  if (st->codec->channels > 1 && bsmod == 0x7)
740  *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
741 
742  st->codec->audio_service_type = *ast;
743 
744  return 0;
745 }
746 
747 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
748 {
749  AVStream *st;
750 
751  if (c->fc->nb_streams < 1)
752  return 0;
753  st = c->fc->streams[c->fc->nb_streams-1];
754 
755  if (atom.size < 16)
756  return 0;
757 
758  /* skip version and flags */
759  avio_skip(pb, 4);
760 
761  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
762 
763  return 0;
764 }
765 
766 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
767 {
768  AVStream *st;
769  int ret;
770 
771  if (c->fc->nb_streams < 1)
772  return 0;
773  st = c->fc->streams[c->fc->nb_streams-1];
774 
775  if ((ret = ff_get_wav_header(c->fc, pb, st->codec, atom.size, 0)) < 0)
776  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
777 
778  return ret;
779 }
780 
781 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
782 {
783  const int num = avio_rb32(pb);
784  const int den = avio_rb32(pb);
785  AVStream *st;
786 
787  if (c->fc->nb_streams < 1)
788  return 0;
789  st = c->fc->streams[c->fc->nb_streams-1];
790 
791  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
792  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
793  av_log(c->fc, AV_LOG_WARNING,
794  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
795  st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
796  num, den);
797  } else if (den != 0) {
798  av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den,
799  num, den, 32767);
800  }
801  return 0;
802 }
803 
804 /* this atom contains actual media data */
805 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
806 {
807  if (atom.size == 0) /* wrong one (MP4) */
808  return 0;
809  c->found_mdat=1;
810  return 0; /* now go for moov */
811 }
812 
813 #define DRM_BLOB_SIZE 56
814 
815 static int mov_read_adrm(MOVContext *c, AVIOContext *pb, MOVAtom atom)
816 {
817  uint8_t intermediate_key[20];
818  uint8_t intermediate_iv[20];
819  uint8_t input[64];
820  uint8_t output[64];
821  uint8_t file_checksum[20];
822  uint8_t calculated_checksum[20];
823  struct AVSHA *sha;
824  int i;
825  int ret = 0;
826  uint8_t *activation_bytes = c->activation_bytes;
827  uint8_t *fixed_key = c->audible_fixed_key;
828 
829  c->aax_mode = 1;
830 
831  sha = av_sha_alloc();
832  if (!sha)
833  return AVERROR(ENOMEM);
834  c->aes_decrypt = av_aes_alloc();
835  if (!c->aes_decrypt) {
836  ret = AVERROR(ENOMEM);
837  goto fail;
838  }
839 
840  /* drm blob processing */
841  avio_read(pb, output, 8); // go to offset 8, absolute postion 0x251
842  avio_read(pb, input, DRM_BLOB_SIZE);
843  avio_read(pb, output, 4); // go to offset 4, absolute postion 0x28d
844  avio_read(pb, file_checksum, 20);
845 
846  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
847  for (i = 0; i < 20; i++)
848  av_log(sha, AV_LOG_INFO, "%02x", file_checksum[i]);
849  av_log(c->fc, AV_LOG_INFO, "\n");
850 
851  /* verify activation data */
852  if (!activation_bytes) {
853  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
854  ret = 0; /* allow ffprobe to continue working on .aax files */
855  goto fail;
856  }
857  if (c->activation_bytes_size != 4) {
858  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
859  ret = AVERROR(EINVAL);
860  goto fail;
861  }
862 
863  /* verify fixed key */
864  if (c->audible_fixed_key_size != 16) {
865  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
866  ret = AVERROR(EINVAL);
867  goto fail;
868  }
869 
870  /* AAX (and AAX+) key derivation */
871  av_sha_init(sha, 160);
872  av_sha_update(sha, fixed_key, 16);
873  av_sha_update(sha, activation_bytes, 4);
874  av_sha_final(sha, intermediate_key);
875  av_sha_init(sha, 160);
876  av_sha_update(sha, fixed_key, 16);
877  av_sha_update(sha, intermediate_key, 20);
878  av_sha_update(sha, activation_bytes, 4);
879  av_sha_final(sha, intermediate_iv);
880  av_sha_init(sha, 160);
881  av_sha_update(sha, intermediate_key, 16);
882  av_sha_update(sha, intermediate_iv, 16);
883  av_sha_final(sha, calculated_checksum);
884  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
885  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
886  ret = AVERROR_INVALIDDATA;
887  goto fail;
888  }
889  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
890  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
891  for (i = 0; i < 4; i++) {
892  // file data (in output) is stored in big-endian mode
893  if (activation_bytes[i] != output[3 - i]) { // critical error
894  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
895  ret = AVERROR_INVALIDDATA;
896  goto fail;
897  }
898  }
899  memcpy(c->file_key, output + 8, 16);
900  memcpy(input, output + 26, 16);
901  av_sha_init(sha, 160);
902  av_sha_update(sha, input, 16);
903  av_sha_update(sha, c->file_key, 16);
904  av_sha_update(sha, fixed_key, 16);
905  av_sha_final(sha, c->file_iv);
906 
907 fail:
908  av_free(sha);
909 
910  return ret;
911 }
912 
913 // Audible AAX (and AAX+) bytestream decryption
914 static int aax_filter(uint8_t *input, int size, MOVContext *c)
915 {
916  int blocks = 0;
917  unsigned char iv[16];
918 
919  memcpy(iv, c->file_iv, 16); // iv is overwritten
920  blocks = size >> 4; // trailing bytes are not encrypted!
921  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
922  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
923 
924  return 0;
925 }
926 
927 /* read major brand, minor version and compatible brands and store them as metadata */
928 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
929 {
930  uint32_t minor_ver;
931  int comp_brand_size;
932  char* comp_brands_str;
933  uint8_t type[5] = {0};
934  int ret = ffio_read_size(pb, type, 4);
935  if (ret < 0)
936  return ret;
937 
938  if (strcmp(type, "qt "))
939  c->isom = 1;
940  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
941  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
942  minor_ver = avio_rb32(pb); /* minor version */
943  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
944 
945  comp_brand_size = atom.size - 8;
946  if (comp_brand_size < 0)
947  return AVERROR_INVALIDDATA;
948  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
949  if (!comp_brands_str)
950  return AVERROR(ENOMEM);
951 
952  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
953  if (ret < 0) {
954  av_freep(&comp_brands_str);
955  return ret;
956  }
957  comp_brands_str[comp_brand_size] = 0;
958  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
959  av_freep(&comp_brands_str);
960 
961  return 0;
962 }
963 
964 /* this atom should contain all header atoms */
965 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
966 {
967  int ret;
968 
969  if (c->found_moov) {
970  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
971  avio_skip(pb, atom.size);
972  return 0;
973  }
974 
975  if ((ret = mov_read_default(c, pb, atom)) < 0)
976  return ret;
977  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
978  /* so we don't parse the whole file if over a network */
979  c->found_moov=1;
980  return 0; /* now go for mdat */
981 }
982 
983 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
984 {
985  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
986  c->has_looked_for_mfra = 1;
987  if (pb->seekable) {
988  int ret;
989  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
990  "for a mfra\n");
991  if ((ret = mov_read_mfra(c, pb)) < 0) {
992  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
993  "read the mfra (may be a live ismv)\n");
994  }
995  } else {
996  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
997  "seekable, can not look for mfra\n");
998  }
999  }
1000  c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
1001  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1002  return mov_read_default(c, pb, atom);
1003 }
1004 
1005 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1006 {
1007  char buffer[32];
1008  if (time) {
1009  struct tm *ptm, tmbuf;
1010  time_t timet;
1011  if(time >= 2082844800)
1012  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1013  timet = time;
1014  ptm = gmtime_r(&timet, &tmbuf);
1015  if (!ptm) return;
1016  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1017  av_dict_set(metadata, "creation_time", buffer, 0);
1018  }
1019 }
1020 
1021 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1022 {
1023  AVStream *st;
1024  MOVStreamContext *sc;
1025  int version;
1026  char language[4] = {0};
1027  unsigned lang;
1028  int64_t creation_time;
1029 
1030  if (c->fc->nb_streams < 1)
1031  return 0;
1032  st = c->fc->streams[c->fc->nb_streams-1];
1033  sc = st->priv_data;
1034 
1035  if (sc->time_scale) {
1036  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1037  return AVERROR_INVALIDDATA;
1038  }
1039 
1040  version = avio_r8(pb);
1041  if (version > 1) {
1042  avpriv_request_sample(c->fc, "Version %d", version);
1043  return AVERROR_PATCHWELCOME;
1044  }
1045  avio_rb24(pb); /* flags */
1046  if (version == 1) {
1047  creation_time = avio_rb64(pb);
1048  avio_rb64(pb);
1049  } else {
1050  creation_time = avio_rb32(pb);
1051  avio_rb32(pb); /* modification time */
1052  }
1053  mov_metadata_creation_time(&st->metadata, creation_time);
1054 
1055  sc->time_scale = avio_rb32(pb);
1056  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1057 
1058  lang = avio_rb16(pb); /* language */
1059  if (ff_mov_lang_to_iso639(lang, language))
1060  av_dict_set(&st->metadata, "language", language, 0);
1061  avio_rb16(pb); /* quality */
1062 
1063  return 0;
1064 }
1065 
1066 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1067 {
1068  int64_t creation_time;
1069  int version = avio_r8(pb); /* version */
1070  avio_rb24(pb); /* flags */
1071 
1072  if (version == 1) {
1073  creation_time = avio_rb64(pb);
1074  avio_rb64(pb);
1075  } else {
1076  creation_time = avio_rb32(pb);
1077  avio_rb32(pb); /* modification time */
1078  }
1079  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1080  c->time_scale = avio_rb32(pb); /* time scale */
1081 
1082  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1083 
1084  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1085  // set the AVCodecContext duration because the duration of individual tracks
1086  // may be inaccurate
1087  if (c->time_scale > 0 && !c->trex_data)
1088  c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
1089  avio_rb32(pb); /* preferred scale */
1090 
1091  avio_rb16(pb); /* preferred volume */
1092 
1093  avio_skip(pb, 10); /* reserved */
1094 
1095  avio_skip(pb, 36); /* display matrix */
1096 
1097  avio_rb32(pb); /* preview time */
1098  avio_rb32(pb); /* preview duration */
1099  avio_rb32(pb); /* poster time */
1100  avio_rb32(pb); /* selection time */
1101  avio_rb32(pb); /* selection duration */
1102  avio_rb32(pb); /* current time */
1103  avio_rb32(pb); /* next track ID */
1104 
1105  return 0;
1106 }
1107 
1108 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1109 {
1110  AVStream *st;
1111  int little_endian;
1112 
1113  if (c->fc->nb_streams < 1)
1114  return 0;
1115  st = c->fc->streams[c->fc->nb_streams-1];
1116 
1117  little_endian = avio_rb16(pb) & 0xFF;
1118  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1119  if (little_endian == 1) {
1120  switch (st->codec->codec_id) {
1121  case AV_CODEC_ID_PCM_S24BE:
1122  st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1123  break;
1124  case AV_CODEC_ID_PCM_S32BE:
1125  st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1126  break;
1127  case AV_CODEC_ID_PCM_F32BE:
1128  st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
1129  break;
1130  case AV_CODEC_ID_PCM_F64BE:
1131  st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
1132  break;
1133  default:
1134  break;
1135  }
1136  }
1137  return 0;
1138 }
1139 
1140 static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1141 {
1142  AVStream *st;
1143  char color_parameter_type[5] = { 0 };
1144  uint16_t color_primaries, color_trc, color_matrix;
1145  int ret;
1146 
1147  if (c->fc->nb_streams < 1)
1148  return 0;
1149  st = c->fc->streams[c->fc->nb_streams - 1];
1150 
1151  ret = ffio_read_size(pb, color_parameter_type, 4);
1152  if (ret < 0)
1153  return ret;
1154  if (strncmp(color_parameter_type, "nclx", 4) &&
1155  strncmp(color_parameter_type, "nclc", 4)) {
1156  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1157  color_parameter_type);
1158  return 0;
1159  }
1160 
1161  color_primaries = avio_rb16(pb);
1162  color_trc = avio_rb16(pb);
1163  color_matrix = avio_rb16(pb);
1164 
1165  av_log(c->fc, AV_LOG_TRACE,
1166  "%s: pri %d trc %d matrix %d",
1167  color_parameter_type, color_primaries, color_trc, color_matrix);
1168 
1169  if (!strncmp(color_parameter_type, "nclx", 4)) {
1170  uint8_t color_range = avio_r8(pb) >> 7;
1171  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1172  if (color_range)
1173  st->codec->color_range = AVCOL_RANGE_JPEG;
1174  else
1175  st->codec->color_range = AVCOL_RANGE_MPEG;
1176  /* 14496-12 references JPEG XR specs (rather than the more complete
1177  * 23001-8) so some adjusting is required */
1178  if (color_primaries >= AVCOL_PRI_FILM)
1179  color_primaries = AVCOL_PRI_UNSPECIFIED;
1180  if ((color_trc >= AVCOL_TRC_LINEAR &&
1181  color_trc <= AVCOL_TRC_LOG_SQRT) ||
1182  color_trc >= AVCOL_TRC_BT2020_10)
1183  color_trc = AVCOL_TRC_UNSPECIFIED;
1184  if (color_matrix >= AVCOL_SPC_BT2020_NCL)
1185  color_matrix = AVCOL_SPC_UNSPECIFIED;
1186  st->codec->color_primaries = color_primaries;
1187  st->codec->color_trc = color_trc;
1188  st->codec->colorspace = color_matrix;
1189  } else if (!strncmp(color_parameter_type, "nclc", 4)) {
1190  /* color primaries, Table 4-4 */
1191  switch (color_primaries) {
1192  case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
1193  case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
1194  case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
1195  }
1196  /* color transfer, Table 4-5 */
1197  switch (color_trc) {
1198  case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
1199  case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
1200  }
1201  /* color matrix, Table 4-6 */
1202  switch (color_matrix) {
1203  case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
1204  case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
1205  case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
1206  }
1207  }
1208  av_log(c->fc, AV_LOG_TRACE, "\n");
1209 
1210  return 0;
1211 }
1212 
1213 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1214 {
1215  AVStream *st;
1216  unsigned mov_field_order;
1217  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1218 
1219  if (c->fc->nb_streams < 1) // will happen with jp2 files
1220  return 0;
1221  st = c->fc->streams[c->fc->nb_streams-1];
1222  if (atom.size < 2)
1223  return AVERROR_INVALIDDATA;
1224  mov_field_order = avio_rb16(pb);
1225  if ((mov_field_order & 0xFF00) == 0x0100)
1226  decoded_field_order = AV_FIELD_PROGRESSIVE;
1227  else if ((mov_field_order & 0xFF00) == 0x0200) {
1228  switch (mov_field_order & 0xFF) {
1229  case 0x01: decoded_field_order = AV_FIELD_TT;
1230  break;
1231  case 0x06: decoded_field_order = AV_FIELD_BB;
1232  break;
1233  case 0x09: decoded_field_order = AV_FIELD_TB;
1234  break;
1235  case 0x0E: decoded_field_order = AV_FIELD_BT;
1236  break;
1237  }
1238  }
1239  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1240  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1241  }
1242  st->codec->field_order = decoded_field_order;
1243 
1244  return 0;
1245 }
1246 
1247 static int mov_realloc_extradata(AVCodecContext *codec, MOVAtom atom)
1248 {
1249  int err = 0;
1250  uint64_t size = (uint64_t)codec->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1251  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1252  return AVERROR_INVALIDDATA;
1253  if ((err = av_reallocp(&codec->extradata, size)) < 0) {
1254  codec->extradata_size = 0;
1255  return err;
1256  }
1257  codec->extradata_size = size - AV_INPUT_BUFFER_PADDING_SIZE;
1258  return 0;
1259 }
1260 
1261 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1262 static int64_t mov_read_atom_into_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1263  AVCodecContext *codec, uint8_t *buf)
1264 {
1265  int64_t result = atom.size;
1266  int err;
1267 
1268  AV_WB32(buf , atom.size + 8);
1269  AV_WL32(buf + 4, atom.type);
1270  err = ffio_read_size(pb, buf + 8, atom.size);
1271  if (err < 0) {
1272  codec->extradata_size -= atom.size;
1273  return err;
1274  } else if (err < atom.size) {
1275  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1276  codec->extradata_size -= atom.size - err;
1277  result = err;
1278  }
1279  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1280  return result;
1281 }
1282 
1283 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1284 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1285  enum AVCodecID codec_id)
1286 {
1287  AVStream *st;
1288  uint64_t original_size;
1289  int err;
1290 
1291  if (c->fc->nb_streams < 1) // will happen with jp2 files
1292  return 0;
1293  st = c->fc->streams[c->fc->nb_streams-1];
1294 
1295  if (st->codec->codec_id != codec_id)
1296  return 0; /* unexpected codec_id - don't mess with extradata */
1297 
1298  original_size = st->codec->extradata_size;
1299  err = mov_realloc_extradata(st->codec, atom);
1300  if (err)
1301  return err;
1302 
1303  err = mov_read_atom_into_extradata(c, pb, atom, st->codec, st->codec->extradata + original_size);
1304  if (err < 0)
1305  return err;
1306  return 0; // Note: this is the original behavior to ignore truncation.
1307 }
1308 
1309 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1310 static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1311 {
1312  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1313 }
1314 
1315 static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1316 {
1317  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1318 }
1319 
1320 static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1321 {
1322  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1323 }
1324 
1325 static int mov_read_dpxe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1326 {
1327  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1328 }
1329 
1330 static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1331 {
1332  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1333  if(ret == 0)
1334  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1335  return ret;
1336 }
1337 
1338 static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1339 {
1340  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1341 
1342  if (!ret && c->fc->nb_streams >= 1) {
1343  AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1344  if (avctx->extradata_size >= 40) {
1345  avctx->height = AV_RB16(&avctx->extradata[36]);
1346  avctx->width = AV_RB16(&avctx->extradata[38]);
1347  }
1348  }
1349  return ret;
1350 }
1351 
1352 static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1353 {
1354  if (c->fc->nb_streams >= 1) {
1355  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1356  if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1357  codec->codec_id == AV_CODEC_ID_H264 &&
1358  atom.size > 11) {
1359  avio_skip(pb, 10);
1360  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1361  if (avio_rb16(pb) == 0xd4d)
1362  codec->width = 1440;
1363  return 0;
1364  }
1365  }
1366 
1367  return mov_read_avid(c, pb, atom);
1368 }
1369 
1370 static int mov_read_aclr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1371 {
1372  int ret = 0;
1373  int length = 0;
1374  uint64_t original_size;
1375  if (c->fc->nb_streams >= 1) {
1376  AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1377  if (codec->codec_id == AV_CODEC_ID_H264)
1378  return 0;
1379  if (atom.size == 16) {
1380  original_size = codec->extradata_size;
1381  ret = mov_realloc_extradata(codec, atom);
1382  if (!ret) {
1383  length = mov_read_atom_into_extradata(c, pb, atom, codec, codec->extradata + original_size);
1384  if (length == atom.size) {
1385  const uint8_t range_value = codec->extradata[original_size + 19];
1386  switch (range_value) {
1387  case 1:
1388  codec->color_range = AVCOL_RANGE_MPEG;
1389  break;
1390  case 2:
1391  codec->color_range = AVCOL_RANGE_JPEG;
1392  break;
1393  default:
1394  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1395  break;
1396  }
1397  ff_dlog(c, "color_range: %d\n", codec->color_range);
1398  } else {
1399  /* For some reason the whole atom was not added to the extradata */
1400  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1401  }
1402  } else {
1403  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1404  }
1405  } else {
1406  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1407  }
1408  }
1409 
1410  return ret;
1411 }
1412 
1413 static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1414 {
1415  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1416 }
1417 
1418 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1419 {
1420  AVStream *st;
1421  int ret;
1422 
1423  if (c->fc->nb_streams < 1)
1424  return 0;
1425  st = c->fc->streams[c->fc->nb_streams-1];
1426 
1427  if ((uint64_t)atom.size > (1<<30))
1428  return AVERROR_INVALIDDATA;
1429 
1430  if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1431  st->codec->codec_id == AV_CODEC_ID_QDMC ||
1432  st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1433  // pass all frma atom to codec, needed at least for QDMC and QDM2
1434  av_freep(&st->codec->extradata);
1435  ret = ff_get_extradata(st->codec, pb, atom.size);
1436  if (ret < 0)
1437  return ret;
1438  } else if (atom.size > 8) { /* to read frma, esds atoms */
1439  if (st->codec->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1440  uint64_t buffer;
1441  ret = ffio_ensure_seekback(pb, 8);
1442  if (ret < 0)
1443  return ret;
1444  buffer = avio_rb64(pb);
1445  atom.size -= 8;
1446  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1447  && buffer >> 32 <= atom.size
1448  && buffer >> 32 >= 8) {
1449  avio_skip(pb, -8);
1450  atom.size += 8;
1451  } else if (!st->codec->extradata_size) {
1452 #define ALAC_EXTRADATA_SIZE 36
1453  st->codec->extradata = av_mallocz(ALAC_EXTRADATA_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
1454  if (!st->codec->extradata)
1455  return AVERROR(ENOMEM);
1456  st->codec->extradata_size = ALAC_EXTRADATA_SIZE;
1457  AV_WB32(st->codec->extradata , ALAC_EXTRADATA_SIZE);
1458  AV_WB32(st->codec->extradata + 4, MKTAG('a','l','a','c'));
1459  AV_WB64(st->codec->extradata + 12, buffer);
1460  avio_read(pb, st->codec->extradata + 20, 16);
1461  avio_skip(pb, atom.size - 24);
1462  return 0;
1463  }
1464  }
1465  if ((ret = mov_read_default(c, pb, atom)) < 0)
1466  return ret;
1467  } else
1468  avio_skip(pb, atom.size);
1469  return 0;
1470 }
1471 
1472 /**
1473  * This function reads atom content and puts data in extradata without tag
1474  * nor size unlike mov_read_extradata.
1475  */
1476 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1477 {
1478  AVStream *st;
1479  int ret;
1480 
1481  if (c->fc->nb_streams < 1)
1482  return 0;
1483  st = c->fc->streams[c->fc->nb_streams-1];
1484 
1485  if ((uint64_t)atom.size > (1<<30))
1486  return AVERROR_INVALIDDATA;
1487 
1488  if (atom.size >= 10) {
1489  // Broken files created by legacy versions of libavformat will
1490  // wrap a whole fiel atom inside of a glbl atom.
1491  unsigned size = avio_rb32(pb);
1492  unsigned type = avio_rl32(pb);
1493  avio_seek(pb, -8, SEEK_CUR);
1494  if (type == MKTAG('f','i','e','l') && size == atom.size)
1495  return mov_read_default(c, pb, atom);
1496  }
1497  if (st->codec->extradata_size > 1 && st->codec->extradata) {
1498  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1499  return 0;
1500  }
1501  av_freep(&st->codec->extradata);
1502  ret = ff_get_extradata(st->codec, pb, atom.size);
1503  if (ret < 0)
1504  return ret;
1505 
1506  return 0;
1507 }
1508 
1509 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1510 {
1511  AVStream *st;
1512  uint8_t profile_level;
1513  int ret;
1514 
1515  if (c->fc->nb_streams < 1)
1516  return 0;
1517  st = c->fc->streams[c->fc->nb_streams-1];
1518 
1519  if (atom.size >= (1<<28) || atom.size < 7)
1520  return AVERROR_INVALIDDATA;
1521 
1522  profile_level = avio_r8(pb);
1523  if ((profile_level & 0xf0) != 0xc0)
1524  return 0;
1525 
1526  avio_seek(pb, 6, SEEK_CUR);
1527  av_freep(&st->codec->extradata);
1528  ret = ff_get_extradata(st->codec, pb, atom.size - 7);
1529  if (ret < 0)
1530  return ret;
1531 
1532  return 0;
1533 }
1534 
1535 /**
1536  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1537  * but can have extradata appended at the end after the 40 bytes belonging
1538  * to the struct.
1539  */
1540 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1541 {
1542  AVStream *st;
1543  int ret;
1544 
1545  if (c->fc->nb_streams < 1)
1546  return 0;
1547  if (atom.size <= 40)
1548  return 0;
1549  st = c->fc->streams[c->fc->nb_streams-1];
1550 
1551  if ((uint64_t)atom.size > (1<<30))
1552  return AVERROR_INVALIDDATA;
1553 
1554  avio_skip(pb, 40);
1555  av_freep(&st->codec->extradata);
1556  ret = ff_get_extradata(st->codec, pb, atom.size - 40);
1557  if (ret < 0)
1558  return ret;
1559 
1560  return 0;
1561 }
1562 
1563 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1564 {
1565  AVStream *st;
1566  MOVStreamContext *sc;
1567  unsigned int i, entries;
1568 
1569  if (c->fc->nb_streams < 1)
1570  return 0;
1571  st = c->fc->streams[c->fc->nb_streams-1];
1572  sc = st->priv_data;
1573 
1574  avio_r8(pb); /* version */
1575  avio_rb24(pb); /* flags */
1576 
1577  entries = avio_rb32(pb);
1578 
1579  if (!entries)
1580  return 0;
1581 
1582  if (sc->chunk_offsets)
1583  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1584  av_free(sc->chunk_offsets);
1585  sc->chunk_count = 0;
1586  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1587  if (!sc->chunk_offsets)
1588  return AVERROR(ENOMEM);
1589  sc->chunk_count = entries;
1590 
1591  if (atom.type == MKTAG('s','t','c','o'))
1592  for (i = 0; i < entries && !pb->eof_reached; i++)
1593  sc->chunk_offsets[i] = avio_rb32(pb);
1594  else if (atom.type == MKTAG('c','o','6','4'))
1595  for (i = 0; i < entries && !pb->eof_reached; i++)
1596  sc->chunk_offsets[i] = avio_rb64(pb);
1597  else
1598  return AVERROR_INVALIDDATA;
1599 
1600  sc->chunk_count = i;
1601 
1602  if (pb->eof_reached)
1603  return AVERROR_EOF;
1604 
1605  return 0;
1606 }
1607 
1608 /**
1609  * Compute codec id for 'lpcm' tag.
1610  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1611  */
1612 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1613 {
1614  /* lpcm flags:
1615  * 0x1 = float
1616  * 0x2 = big-endian
1617  * 0x4 = signed
1618  */
1619  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1620 }
1621 
1622 static int mov_codec_id(AVStream *st, uint32_t format)
1623 {
1624  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1625 
1626  if (id <= 0 &&
1627  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1628  (format & 0xFFFF) == 'T' + ('S' << 8)))
1629  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1630 
1631  if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1632  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1633  } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1634  /* skip old asf mpeg4 tag */
1635  format && format != MKTAG('m','p','4','s')) {
1636  id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1637  if (id <= 0)
1638  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1639  if (id > 0)
1640  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1641  else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1642  (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1643  st->codec->codec_id == AV_CODEC_ID_NONE)) {
1644  id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1645  if (id > 0)
1646  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1647  }
1648  }
1649 
1650  st->codec->codec_tag = format;
1651 
1652  return id;
1653 }
1654 
1655 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1656  AVStream *st, MOVStreamContext *sc)
1657 {
1658  uint8_t codec_name[32];
1659  unsigned int color_depth, len, j;
1660  int color_greyscale;
1661  int color_table_id;
1662 
1663  avio_rb16(pb); /* version */
1664  avio_rb16(pb); /* revision level */
1665  avio_rb32(pb); /* vendor */
1666  avio_rb32(pb); /* temporal quality */
1667  avio_rb32(pb); /* spatial quality */
1668 
1669  st->codec->width = avio_rb16(pb); /* width */
1670  st->codec->height = avio_rb16(pb); /* height */
1671 
1672  avio_rb32(pb); /* horiz resolution */
1673  avio_rb32(pb); /* vert resolution */
1674  avio_rb32(pb); /* data size, always 0 */
1675  avio_rb16(pb); /* frames per samples */
1676 
1677  len = avio_r8(pb); /* codec name, pascal string */
1678  if (len > 31)
1679  len = 31;
1680  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1681  if (len < 31)
1682  avio_skip(pb, 31 - len);
1683 
1684  if (codec_name[0])
1685  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1686 
1687  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1688  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1689  st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1690  st->codec->width &= ~1;
1691  st->codec->height &= ~1;
1692  }
1693  /* Flash Media Server uses tag H263 with Sorenson Spark */
1694  if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1695  !memcmp(codec_name, "Sorenson H263", 13))
1696  st->codec->codec_id = AV_CODEC_ID_FLV1;
1697 
1698  st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1699  color_table_id = avio_rb16(pb); /* colortable id */
1700  av_log(c->fc, AV_LOG_TRACE, "depth %d, ctab id %d\n",
1701  st->codec->bits_per_coded_sample, color_table_id);
1702  /* figure out the palette situation */
1703  color_depth = st->codec->bits_per_coded_sample & 0x1F;
1704  color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1705  /* Do not create a greyscale palette for cinepak */
1706  if (color_greyscale && st->codec->codec_id == AV_CODEC_ID_CINEPAK)
1707  return;
1708 
1709  /* if the depth is 2, 4, or 8 bpp, file is palettized */
1710  if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1711  /* for palette traversal */
1712  unsigned int color_start, color_count, color_end;
1713  unsigned int a, r, g, b;
1714 
1715  if (color_greyscale) {
1716  int color_index, color_dec;
1717  /* compute the greyscale palette */
1718  st->codec->bits_per_coded_sample = color_depth;
1719  color_count = 1 << color_depth;
1720  color_index = 255;
1721  color_dec = 256 / (color_count - 1);
1722  for (j = 0; j < color_count; j++) {
1723  r = g = b = color_index;
1724  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1725  color_index -= color_dec;
1726  if (color_index < 0)
1727  color_index = 0;
1728  }
1729  } else if (color_table_id) {
1730  const uint8_t *color_table;
1731  /* if flag bit 3 is set, use the default palette */
1732  color_count = 1 << color_depth;
1733  if (color_depth == 2)
1734  color_table = ff_qt_default_palette_4;
1735  else if (color_depth == 4)
1736  color_table = ff_qt_default_palette_16;
1737  else
1738  color_table = ff_qt_default_palette_256;
1739 
1740  for (j = 0; j < color_count; j++) {
1741  r = color_table[j * 3 + 0];
1742  g = color_table[j * 3 + 1];
1743  b = color_table[j * 3 + 2];
1744  sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1745  }
1746  } else {
1747  /* load the palette from the file */
1748  color_start = avio_rb32(pb);
1749  color_count = avio_rb16(pb);
1750  color_end = avio_rb16(pb);
1751  if ((color_start <= 255) && (color_end <= 255)) {
1752  for (j = color_start; j <= color_end; j++) {
1753  /* each A, R, G, or B component is 16 bits;
1754  * only use the top 8 bits */
1755  a = avio_r8(pb);
1756  avio_r8(pb);
1757  r = avio_r8(pb);
1758  avio_r8(pb);
1759  g = avio_r8(pb);
1760  avio_r8(pb);
1761  b = avio_r8(pb);
1762  avio_r8(pb);
1763  sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1764  }
1765  }
1766  }
1767  sc->has_palette = 1;
1768  }
1769 }
1770 
1771 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1772  AVStream *st, MOVStreamContext *sc)
1773 {
1774  int bits_per_sample, flags;
1775  uint16_t version = avio_rb16(pb);
1776  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1777 
1778  avio_rb16(pb); /* revision level */
1779  avio_rb32(pb); /* vendor */
1780 
1781  st->codec->channels = avio_rb16(pb); /* channel count */
1782  st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1783  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codec->channels);
1784 
1785  sc->audio_cid = avio_rb16(pb);
1786  avio_rb16(pb); /* packet size = 0 */
1787 
1788  st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1789 
1790  // Read QT version 1 fields. In version 0 these do not exist.
1791  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1792  if (!c->isom ||
1793  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1794 
1795  if (version == 1) {
1796  sc->samples_per_frame = avio_rb32(pb);
1797  avio_rb32(pb); /* bytes per packet */
1798  sc->bytes_per_frame = avio_rb32(pb);
1799  avio_rb32(pb); /* bytes per sample */
1800  } else if (version == 2) {
1801  avio_rb32(pb); /* sizeof struct only */
1802  st->codec->sample_rate = av_int2double(avio_rb64(pb));
1803  st->codec->channels = avio_rb32(pb);
1804  avio_rb32(pb); /* always 0x7F000000 */
1805  st->codec->bits_per_coded_sample = avio_rb32(pb);
1806 
1807  flags = avio_rb32(pb); /* lpcm format specific flag */
1808  sc->bytes_per_frame = avio_rb32(pb);
1809  sc->samples_per_frame = avio_rb32(pb);
1810  if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1811  st->codec->codec_id =
1812  ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
1813  flags);
1814  }
1815  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1816  /* can't correctly handle variable sized packet as audio unit */
1817  switch (st->codec->codec_id) {
1818  case AV_CODEC_ID_MP2:
1819  case AV_CODEC_ID_MP3:
1820  st->need_parsing = AVSTREAM_PARSE_FULL;
1821  break;
1822  }
1823  }
1824  }
1825 
1826  switch (st->codec->codec_id) {
1827  case AV_CODEC_ID_PCM_S8:
1828  case AV_CODEC_ID_PCM_U8:
1829  if (st->codec->bits_per_coded_sample == 16)
1830  st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1831  break;
1832  case AV_CODEC_ID_PCM_S16LE:
1833  case AV_CODEC_ID_PCM_S16BE:
1834  if (st->codec->bits_per_coded_sample == 8)
1835  st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1836  else if (st->codec->bits_per_coded_sample == 24)
1837  st->codec->codec_id =
1838  st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1839  AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1840  else if (st->codec->bits_per_coded_sample == 32)
1841  st->codec->codec_id =
1842  st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1843  AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
1844  break;
1845  /* set values for old format before stsd version 1 appeared */
1846  case AV_CODEC_ID_MACE3:
1847  sc->samples_per_frame = 6;
1848  sc->bytes_per_frame = 2 * st->codec->channels;
1849  break;
1850  case AV_CODEC_ID_MACE6:
1851  sc->samples_per_frame = 6;
1852  sc->bytes_per_frame = 1 * st->codec->channels;
1853  break;
1854  case AV_CODEC_ID_ADPCM_IMA_QT:
1855  sc->samples_per_frame = 64;
1856  sc->bytes_per_frame = 34 * st->codec->channels;
1857  break;
1858  case AV_CODEC_ID_GSM:
1859  sc->samples_per_frame = 160;
1860  sc->bytes_per_frame = 33;
1861  break;
1862  default:
1863  break;
1864  }
1865 
1866  bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1867  if (bits_per_sample) {
1868  st->codec->bits_per_coded_sample = bits_per_sample;
1869  sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1870  }
1871 }
1872 
1873 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
1874  AVStream *st, MOVStreamContext *sc,
1875  int64_t size)
1876 {
1877  // ttxt stsd contains display flags, justification, background
1878  // color, fonts, and default styles, so fake an atom to read it
1879  MOVAtom fake_atom = { .size = size };
1880  // mp4s contains a regular esds atom
1881  if (st->codec->codec_tag != AV_RL32("mp4s"))
1882  mov_read_glbl(c, pb, fake_atom);
1883  st->codec->width = sc->width;
1884  st->codec->height = sc->height;
1885 }
1886 
1887 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1888 {
1889  uint8_t r, g, b;
1890  int y, cb, cr;
1891 
1892  y = (ycbcr >> 16) & 0xFF;
1893  cr = (ycbcr >> 8) & 0xFF;
1894  cb = ycbcr & 0xFF;
1895 
1896  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
1897  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
1898  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
1899 
1900  return (r << 16) | (g << 8) | b;
1901 }
1902 
1903 static int mov_rewrite_dvd_sub_extradata(AVStream *st)
1904 {
1905  char buf[256] = {0};
1906  uint8_t *src = st->codec->extradata;
1907  int i;
1908 
1909  if (st->codec->extradata_size != 64)
1910  return 0;
1911 
1912  if (st->codec->width > 0 && st->codec->height > 0)
1913  snprintf(buf, sizeof(buf), "size: %dx%d\n",
1914  st->codec->width, st->codec->height);
1915  av_strlcat(buf, "palette: ", sizeof(buf));
1916 
1917  for (i = 0; i < 16; i++) {
1918  uint32_t yuv = AV_RB32(src + i * 4);
1919  uint32_t rgba = yuv_to_rgba(yuv);
1920 
1921  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1922  }
1923 
1924  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1925  return 0;
1926 
1927  av_freep(&st->codec->extradata);
1928  st->codec->extradata_size = 0;
1929  st->codec->extradata = av_mallocz(strlen(buf) + AV_INPUT_BUFFER_PADDING_SIZE);
1930  if (!st->codec->extradata)
1931  return AVERROR(ENOMEM);
1932  st->codec->extradata_size = strlen(buf);
1933  memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1934 
1935  return 0;
1936 }
1937 
1938 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
1939  AVStream *st, MOVStreamContext *sc,
1940  int64_t size)
1941 {
1942  int ret;
1943 
1944  if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1945  if ((int)size != size)
1946  return AVERROR(ENOMEM);
1947 
1948  ret = ff_get_extradata(st->codec, pb, size);
1949  if (ret < 0)
1950  return ret;
1951  if (size > 16) {
1952  MOVStreamContext *tmcd_ctx = st->priv_data;
1953  int val;
1954  val = AV_RB32(st->codec->extradata + 4);
1955  tmcd_ctx->tmcd_flags = val;
1956  if (val & 1)
1957  st->codec->flags2 |= AV_CODEC_FLAG2_DROP_FRAME_TIMECODE;
1958  st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1959  st->codec->time_base.num = 1;
1960  /* adjust for per frame dur in counter mode */
1961  if (tmcd_ctx->tmcd_flags & 0x0008) {
1962  int timescale = AV_RB32(st->codec->extradata + 8);
1963  int framedur = AV_RB32(st->codec->extradata + 12);
1964  st->codec->time_base.den *= timescale;
1965  st->codec->time_base.num *= framedur;
1966  }
1967  if (size > 30) {
1968  uint32_t len = AV_RB32(st->codec->extradata + 18); /* name atom length */
1969  uint32_t format = AV_RB32(st->codec->extradata + 22);
1970  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
1971  uint16_t str_size = AV_RB16(st->codec->extradata + 26); /* string length */
1972  if (str_size > 0 && size >= (int)str_size + 26) {
1973  char *reel_name = av_malloc(str_size + 1);
1974  if (!reel_name)
1975  return AVERROR(ENOMEM);
1976  memcpy(reel_name, st->codec->extradata + 30, str_size);
1977  reel_name[str_size] = 0; /* Add null terminator */
1978  /* don't add reel_name if emtpy string */
1979  if (*reel_name == 0) {
1980  av_free(reel_name);
1981  } else {
1982  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
1983  }
1984  }
1985  }
1986  }
1987  }
1988  } else {
1989  /* other codec type, just skip (rtp, mp4s ...) */
1990  avio_skip(pb, size);
1991  }
1992  return 0;
1993 }
1994 
1995 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
1996  AVStream *st, MOVStreamContext *sc)
1997 {
1998  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1999  !st->codec->sample_rate && sc->time_scale > 1)
2000  st->codec->sample_rate = sc->time_scale;
2001 
2002  /* special codec parameters handling */
2003  switch (st->codec->codec_id) {
2004 #if CONFIG_DV_DEMUXER
2005  case AV_CODEC_ID_DVAUDIO:
2006  c->dv_fctx = avformat_alloc_context();
2007  if (!c->dv_fctx) {
2008  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2009  return AVERROR(ENOMEM);
2010  }
2011  c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
2012  if (!c->dv_demux) {
2013  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2014  return AVERROR(ENOMEM);
2015  }
2016  sc->dv_audio_container = 1;
2017  st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
2018  break;
2019 #endif
2020  /* no ifdef since parameters are always those */
2021  case AV_CODEC_ID_QCELP:
2022  st->codec->channels = 1;
2023  // force sample rate for qcelp when not stored in mov
2024  if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
2025  st->codec->sample_rate = 8000;
2026  // FIXME: Why is the following needed for some files?
2027  sc->samples_per_frame = 160;
2028  if (!sc->bytes_per_frame)
2029  sc->bytes_per_frame = 35;
2030  break;
2031  case AV_CODEC_ID_AMR_NB:
2032  st->codec->channels = 1;
2033  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2034  st->codec->sample_rate = 8000;
2035  break;
2036  case AV_CODEC_ID_AMR_WB:
2037  st->codec->channels = 1;
2038  st->codec->sample_rate = 16000;
2039  break;
2040  case AV_CODEC_ID_MP2:
2041  case AV_CODEC_ID_MP3:
2042  /* force type after stsd for m1a hdlr */
2043  st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
2044  break;
2045  case AV_CODEC_ID_GSM:
2046  case AV_CODEC_ID_ADPCM_MS:
2047  case AV_CODEC_ID_ADPCM_IMA_WAV:
2048  case AV_CODEC_ID_ILBC:
2049  case AV_CODEC_ID_MACE3:
2050  case AV_CODEC_ID_MACE6:
2051  case AV_CODEC_ID_QDM2:
2052  st->codec->block_align = sc->bytes_per_frame;
2053  break;
2054  case AV_CODEC_ID_ALAC:
2055  if (st->codec->extradata_size == 36) {
2056  st->codec->channels = AV_RB8 (st->codec->extradata + 21);
2057  st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
2058  }
2059  break;
2060  case AV_CODEC_ID_AC3:
2061  case AV_CODEC_ID_EAC3:
2062  case AV_CODEC_ID_MPEG1VIDEO:
2063  case AV_CODEC_ID_VC1:
2064  st->need_parsing = AVSTREAM_PARSE_FULL;
2065  break;
2066  default:
2067  break;
2068  }
2069  return 0;
2070 }
2071 
2072 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
2073  int codec_tag, int format,
2074  int64_t size)
2075 {
2076  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2077 
2078  if (codec_tag &&
2079  (codec_tag != format &&
2080  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2081  : codec_tag != MKTAG('j','p','e','g')))) {
2082  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2083  * export it as a separate AVStream but this needs a few changes
2084  * in the MOV demuxer, patch welcome. */
2085 
2086  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2087  avio_skip(pb, size);
2088  return 1;
2089  }
2090  if ( codec_tag == AV_RL32("avc1") ||
2091  codec_tag == AV_RL32("hvc1") ||
2092  codec_tag == AV_RL32("hev1")
2093  )
2094  av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
2095 
2096  return 0;
2097 }
2098 
2099 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
2100 {
2101  AVStream *st;
2102  MOVStreamContext *sc;
2103  int pseudo_stream_id;
2104 
2105  if (c->fc->nb_streams < 1)
2106  return 0;
2107  st = c->fc->streams[c->fc->nb_streams-1];
2108  sc = st->priv_data;
2109 
2110  for (pseudo_stream_id = 0;
2111  pseudo_stream_id < entries && !pb->eof_reached;
2112  pseudo_stream_id++) {
2113  //Parsing Sample description table
2114  enum AVCodecID id;
2115  int ret, dref_id = 1;
2116  MOVAtom a = { AV_RL32("stsd") };
2117  int64_t start_pos = avio_tell(pb);
2118  int64_t size = avio_rb32(pb); /* size */
2119  uint32_t format = avio_rl32(pb); /* data format */
2120 
2121  if (size >= 16) {
2122  avio_rb32(pb); /* reserved */
2123  avio_rb16(pb); /* reserved */
2124  dref_id = avio_rb16(pb);
2125  }else if (size <= 7){
2126  av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
2127  return AVERROR_INVALIDDATA;
2128  }
2129 
2130  if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
2131  size - (avio_tell(pb) - start_pos)))
2132  continue;
2133 
2134  sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
2135  sc->dref_id= dref_id;
2136 
2137  id = mov_codec_id(st, format);
2138 
2139  av_log(c->fc, AV_LOG_TRACE,
2140  "size=%"PRId64" 4CC= %c%c%c%c/0x%08x codec_type=%d\n", size,
2141  (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
2142  (format >> 24) & 0xff, format, st->codec->codec_type);
2143 
2144  if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
2145  st->codec->codec_id = id;
2146  mov_parse_stsd_video(c, pb, st, sc);
2147  } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
2148  st->codec->codec_id = id;
2149  mov_parse_stsd_audio(c, pb, st, sc);
2150  } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
2151  st->codec->codec_id = id;
2152  mov_parse_stsd_subtitle(c, pb, st, sc,
2153  size - (avio_tell(pb) - start_pos));
2154  } else {
2155  ret = mov_parse_stsd_data(c, pb, st, sc,
2156  size - (avio_tell(pb) - start_pos));
2157  if (ret < 0)
2158  return ret;
2159  }
2160  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2161  a.size = size - (avio_tell(pb) - start_pos);
2162  if (a.size > 8) {
2163  if ((ret = mov_read_default(c, pb, a)) < 0)
2164  return ret;
2165  } else if (a.size > 0)
2166  avio_skip(pb, a.size);
2167  }
2168 
2169  if (pb->eof_reached)
2170  return AVERROR_EOF;
2171 
2172  return mov_finalize_stsd_codec(c, pb, st, sc);
2173 }
2174 
2175 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2176 {
2177  int entries;
2178 
2179  avio_r8(pb); /* version */
2180  avio_rb24(pb); /* flags */
2181  entries = avio_rb32(pb);
2182 
2183  return ff_mov_read_stsd_entries(c, pb, entries);
2184 }
2185 
2186 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2187 {
2188  AVStream *st;
2189  MOVStreamContext *sc;
2190  unsigned int i, entries;
2191 
2192  if (c->fc->nb_streams < 1)
2193  return 0;
2194  st = c->fc->streams[c->fc->nb_streams-1];
2195  sc = st->priv_data;
2196 
2197  avio_r8(pb); /* version */
2198  avio_rb24(pb); /* flags */
2199 
2200  entries = avio_rb32(pb);
2201 
2202  av_log(c->fc, AV_LOG_TRACE, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
2203 
2204  if (!entries)
2205  return 0;
2206  if (sc->stsc_data)
2207  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2208  av_free(sc->stsc_data);
2209  sc->stsc_count = 0;
2210  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2211  if (!sc->stsc_data)
2212  return AVERROR(ENOMEM);
2213 
2214  for (i = 0; i < entries && !pb->eof_reached; i++) {
2215  sc->stsc_data[i].first = avio_rb32(pb);
2216  sc->stsc_data[i].count = avio_rb32(pb);
2217  sc->stsc_data[i].id = avio_rb32(pb);
2218  }
2219 
2220  sc->stsc_count = i;
2221 
2222  if (pb->eof_reached)
2223  return AVERROR_EOF;
2224 
2225  return 0;
2226 }
2227 
2228 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2229 {
2230  AVStream *st;
2231  MOVStreamContext *sc;
2232  unsigned i, entries;
2233 
2234  if (c->fc->nb_streams < 1)
2235  return 0;
2236  st = c->fc->streams[c->fc->nb_streams-1];
2237  sc = st->priv_data;
2238 
2239  avio_rb32(pb); // version + flags
2240 
2241  entries = avio_rb32(pb);
2242  if (sc->stps_data)
2243  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2244  av_free(sc->stps_data);
2245  sc->stps_count = 0;
2246  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2247  if (!sc->stps_data)
2248  return AVERROR(ENOMEM);
2249 
2250  for (i = 0; i < entries && !pb->eof_reached; i++) {
2251  sc->stps_data[i] = avio_rb32(pb);
2252  //av_log(c->fc, AV_LOG_TRACE, "stps %d\n", sc->stps_data[i]);
2253  }
2254 
2255  sc->stps_count = i;
2256 
2257  if (pb->eof_reached)
2258  return AVERROR_EOF;
2259 
2260  return 0;
2261 }
2262 
2263 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2264 {
2265  AVStream *st;
2266  MOVStreamContext *sc;
2267  unsigned int i, entries;
2268 
2269  if (c->fc->nb_streams < 1)
2270  return 0;
2271  st = c->fc->streams[c->fc->nb_streams-1];
2272  sc = st->priv_data;
2273 
2274  avio_r8(pb); /* version */
2275  avio_rb24(pb); /* flags */
2276 
2277  entries = avio_rb32(pb);
2278 
2279  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %d\n", entries);
2280 
2281  if (!entries)
2282  {
2283  sc->keyframe_absent = 1;
2284  if (!st->need_parsing && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2285  st->need_parsing = AVSTREAM_PARSE_HEADERS;
2286  return 0;
2287  }
2288  if (sc->keyframes)
2289  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2290  if (entries >= UINT_MAX / sizeof(int))
2291  return AVERROR_INVALIDDATA;
2292  av_freep(&sc->keyframes);
2293  sc->keyframe_count = 0;
2294  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2295  if (!sc->keyframes)
2296  return AVERROR(ENOMEM);
2297 
2298  for (i = 0; i < entries && !pb->eof_reached; i++) {
2299  sc->keyframes[i] = avio_rb32(pb);
2300  //av_log(c->fc, AV_LOG_TRACE, "keyframes[]=%d\n", sc->keyframes[i]);
2301  }
2302 
2303  sc->keyframe_count = i;
2304 
2305  if (pb->eof_reached)
2306  return AVERROR_EOF;
2307 
2308  return 0;
2309 }
2310 
2311 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2312 {
2313  AVStream *st;
2314  MOVStreamContext *sc;
2315  unsigned int i, entries, sample_size, field_size, num_bytes;
2316  GetBitContext gb;
2317  unsigned char* buf;
2318  int ret;
2319 
2320  if (c->fc->nb_streams < 1)
2321  return 0;
2322  st = c->fc->streams[c->fc->nb_streams-1];
2323  sc = st->priv_data;
2324 
2325  avio_r8(pb); /* version */
2326  avio_rb24(pb); /* flags */
2327 
2328  if (atom.type == MKTAG('s','t','s','z')) {
2329  sample_size = avio_rb32(pb);
2330  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2331  sc->sample_size = sample_size;
2332  sc->stsz_sample_size = sample_size;
2333  field_size = 32;
2334  } else {
2335  sample_size = 0;
2336  avio_rb24(pb); /* reserved */
2337  field_size = avio_r8(pb);
2338  }
2339  entries = avio_rb32(pb);
2340 
2341  av_log(c->fc, AV_LOG_TRACE, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2342 
2343  sc->sample_count = entries;
2344  if (sample_size)
2345  return 0;
2346 
2347  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2348  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2349  return AVERROR_INVALIDDATA;
2350  }
2351 
2352  if (!entries)
2353  return 0;
2354  if (entries >= (UINT_MAX - 4) / field_size)
2355  return AVERROR_INVALIDDATA;
2356  if (sc->sample_sizes)
2357  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2358  av_free(sc->sample_sizes);
2359  sc->sample_count = 0;
2360  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2361  if (!sc->sample_sizes)
2362  return AVERROR(ENOMEM);
2363 
2364  num_bytes = (entries*field_size+4)>>3;
2365 
2366  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2367  if (!buf) {
2368  av_freep(&sc->sample_sizes);
2369  return AVERROR(ENOMEM);
2370  }
2371 
2372  ret = ffio_read_size(pb, buf, num_bytes);
2373  if (ret < 0) {
2374  av_freep(&sc->sample_sizes);
2375  av_free(buf);
2376  return ret;
2377  }
2378 
2379  init_get_bits(&gb, buf, 8*num_bytes);
2380 
2381  for (i = 0; i < entries && !pb->eof_reached; i++) {
2382  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2383  sc->data_size += sc->sample_sizes[i];
2384  }
2385 
2386  sc->sample_count = i;
2387 
2388  av_free(buf);
2389 
2390  if (pb->eof_reached)
2391  return AVERROR_EOF;
2392 
2393  return 0;
2394 }
2395 
2396 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2397 {
2398  AVStream *st;
2399  MOVStreamContext *sc;
2400  unsigned int i, entries;
2401  int64_t duration=0;
2402  int64_t total_sample_count=0;
2403 
2404  if (c->fc->nb_streams < 1)
2405  return 0;
2406  st = c->fc->streams[c->fc->nb_streams-1];
2407  sc = st->priv_data;
2408 
2409  avio_r8(pb); /* version */
2410  avio_rb24(pb); /* flags */
2411  entries = avio_rb32(pb);
2412 
2413  av_log(c->fc, AV_LOG_TRACE, "track[%i].stts.entries = %i\n",
2414  c->fc->nb_streams-1, entries);
2415 
2416  if (sc->stts_data)
2417  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2418  av_free(sc->stts_data);
2419  sc->stts_count = 0;
2420  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2421  if (!sc->stts_data)
2422  return AVERROR(ENOMEM);
2423 
2424  for (i = 0; i < entries && !pb->eof_reached; i++) {
2425  int sample_duration;
2426  int sample_count;
2427 
2428  sample_count=avio_rb32(pb);
2429  sample_duration = avio_rb32(pb);
2430 
2431  if (sample_count < 0) {
2432  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2433  return AVERROR_INVALIDDATA;
2434  }
2435  sc->stts_data[i].count= sample_count;
2436  sc->stts_data[i].duration= sample_duration;
2437 
2438  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2439  sample_count, sample_duration);
2440 
2441  if ( i+1 == entries
2442  && i
2443  && sample_count == 1
2444  && total_sample_count > 100
2445  && sample_duration/10 > duration / total_sample_count)
2446  sample_duration = duration / total_sample_count;
2447  duration+=(int64_t)sample_duration*sample_count;
2448  total_sample_count+=sample_count;
2449  }
2450 
2451  sc->stts_count = i;
2452 
2453  sc->duration_for_fps += duration;
2454  sc->nb_frames_for_fps += total_sample_count;
2455 
2456  if (pb->eof_reached)
2457  return AVERROR_EOF;
2458 
2459  st->nb_frames= total_sample_count;
2460  if (duration)
2461  st->duration= duration;
2462  sc->track_end = duration;
2463  return 0;
2464 }
2465 
2466 static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
2467 {
2468  if (duration < 0) {
2469  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2470  }
2471 }
2472 
2473 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2474 {
2475  AVStream *st;
2476  MOVStreamContext *sc;
2477  unsigned int i, entries;
2478 
2479  if (c->fc->nb_streams < 1)
2480  return 0;
2481  st = c->fc->streams[c->fc->nb_streams-1];
2482  sc = st->priv_data;
2483 
2484  avio_r8(pb); /* version */
2485  avio_rb24(pb); /* flags */
2486  entries = avio_rb32(pb);
2487 
2488  av_log(c->fc, AV_LOG_TRACE, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2489 
2490  if (!entries)
2491  return 0;
2492  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2493  return AVERROR_INVALIDDATA;
2494  av_freep(&sc->ctts_data);
2495  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2496  if (!sc->ctts_data)
2497  return AVERROR(ENOMEM);
2498 
2499  for (i = 0; i < entries && !pb->eof_reached; i++) {
2500  int count =avio_rb32(pb);
2501  int duration =avio_rb32(pb);
2502 
2503  sc->ctts_data[i].count = count;
2504  sc->ctts_data[i].duration= duration;
2505 
2506  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2507  count, duration);
2508 
2509  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2510  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2511  av_freep(&sc->ctts_data);
2512  sc->ctts_count = 0;
2513  return 0;
2514  }
2515 
2516  if (i+2<entries)
2517  mov_update_dts_shift(sc, duration);
2518  }
2519 
2520  sc->ctts_count = i;
2521 
2522  if (pb->eof_reached)
2523  return AVERROR_EOF;
2524 
2525  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2526 
2527  return 0;
2528 }
2529 
2530 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2531 {
2532  AVStream *st;
2533  MOVStreamContext *sc;
2534  unsigned int i, entries;
2535  uint8_t version;
2536  uint32_t grouping_type;
2537 
2538  if (c->fc->nb_streams < 1)
2539  return 0;
2540  st = c->fc->streams[c->fc->nb_streams-1];
2541  sc = st->priv_data;
2542 
2543  version = avio_r8(pb); /* version */
2544  avio_rb24(pb); /* flags */
2545  grouping_type = avio_rl32(pb);
2546  if (grouping_type != MKTAG( 'r','a','p',' '))
2547  return 0; /* only support 'rap ' grouping */
2548  if (version == 1)
2549  avio_rb32(pb); /* grouping_type_parameter */
2550 
2551  entries = avio_rb32(pb);
2552  if (!entries)
2553  return 0;
2554  if (sc->rap_group)
2555  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2556  av_free(sc->rap_group);
2557  sc->rap_group_count = 0;
2558  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2559  if (!sc->rap_group)
2560  return AVERROR(ENOMEM);
2561 
2562  for (i = 0; i < entries && !pb->eof_reached; i++) {
2563  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2564  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2565  }
2566 
2567  sc->rap_group_count = i;
2568 
2569  return pb->eof_reached ? AVERROR_EOF : 0;
2570 }
2571 
2572 static void mov_build_index(MOVContext *mov, AVStream *st)
2573 {
2574  MOVStreamContext *sc = st->priv_data;
2575  int64_t current_offset;
2576  int64_t current_dts = 0;
2577  unsigned int stts_index = 0;
2578  unsigned int stsc_index = 0;
2579  unsigned int stss_index = 0;
2580  unsigned int stps_index = 0;
2581  unsigned int i, j;
2582  uint64_t stream_size = 0;
2583 
2584  if (sc->elst_count) {
2585  int i, edit_start_index = 0, unsupported = 0;
2586  int64_t empty_duration = 0; // empty duration of the first edit list entry
2587  int64_t start_time = 0; // start time of the media
2588 
2589  for (i = 0; i < sc->elst_count; i++) {
2590  const MOVElst *e = &sc->elst_data[i];
2591  if (i == 0 && e->time == -1) {
2592  /* if empty, the first entry is the start time of the stream
2593  * relative to the presentation itself */
2594  empty_duration = e->duration;
2595  edit_start_index = 1;
2596  } else if (i == edit_start_index && e->time >= 0) {
2597  start_time = e->time;
2598  } else
2599  unsupported = 1;
2600  }
2601  if (unsupported)
2602  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
2603  "a/v desync might occur, patch welcome\n");
2604 
2605  /* adjust first dts according to edit list */
2606  if ((empty_duration || start_time) && mov->time_scale > 0) {
2607  if (empty_duration)
2608  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
2609  sc->time_offset = start_time - empty_duration;
2610  current_dts = -sc->time_offset;
2611  if (sc->ctts_count>0 && sc->stts_count>0 &&
2612  sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2613  /* more than 16 frames delay, dts are likely wrong
2614  this happens with files created by iMovie */
2615  sc->wrong_dts = 1;
2616  st->codec->has_b_frames = 1;
2617  }
2618  }
2619  }
2620 
2621  /* only use old uncompressed audio chunk demuxing when stts specifies it */
2622  if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2623  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2624  unsigned int current_sample = 0;
2625  unsigned int stts_sample = 0;
2626  unsigned int sample_size;
2627  unsigned int distance = 0;
2628  unsigned int rap_group_index = 0;
2629  unsigned int rap_group_sample = 0;
2630  int64_t last_dts = 0;
2631  int64_t dts_correction = 0;
2632  int rap_group_present = sc->rap_group_count && sc->rap_group;
2633  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2634 
2635  current_dts -= sc->dts_shift;
2636  last_dts = current_dts;
2637 
2638  if (!sc->sample_count || st->nb_index_entries)
2639  return;
2640  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2641  return;
2642  if (av_reallocp_array(&st->index_entries,
2643  st->nb_index_entries + sc->sample_count,
2644  sizeof(*st->index_entries)) < 0) {
2645  st->nb_index_entries = 0;
2646  return;
2647  }
2648  st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
2649 
2650  for (i = 0; i < sc->chunk_count; i++) {
2651  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2652  current_offset = sc->chunk_offsets[i];
2653  while (stsc_index + 1 < sc->stsc_count &&
2654  i + 1 == sc->stsc_data[stsc_index + 1].first)
2655  stsc_index++;
2656 
2657  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2658  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2659  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2660  sc->stsz_sample_size = sc->sample_size;
2661  }
2662  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2663  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2664  sc->stsz_sample_size = sc->sample_size;
2665  }
2666 
2667  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2668  int keyframe = 0;
2669  if (current_sample >= sc->sample_count) {
2670  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2671  return;
2672  }
2673 
2674  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2675  keyframe = 1;
2676  if (stss_index + 1 < sc->keyframe_count)
2677  stss_index++;
2678  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2679  keyframe = 1;
2680  if (stps_index + 1 < sc->stps_count)
2681  stps_index++;
2682  }
2683  if (rap_group_present && rap_group_index < sc->rap_group_count) {
2684  if (sc->rap_group[rap_group_index].index > 0)
2685  keyframe = 1;
2686  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2687  rap_group_sample = 0;
2688  rap_group_index++;
2689  }
2690  }
2691  if (sc->keyframe_absent
2692  && !sc->stps_count
2693  && !rap_group_present
2694  && (st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
2695  keyframe = 1;
2696  if (keyframe)
2697  distance = 0;
2698  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2699  if (sc->pseudo_stream_id == -1 ||
2700  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2701  AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2702  e->pos = current_offset;
2703  e->timestamp = current_dts;
2704  e->size = sample_size;
2705  e->min_distance = distance;
2706  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2707  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2708  "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2709  current_offset, current_dts, sample_size, distance, keyframe);
2710  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
2711  ff_rfps_add_frame(mov->fc, st, current_dts);
2712  }
2713 
2714  current_offset += sample_size;
2715  stream_size += sample_size;
2716 
2717  /* A negative sample duration is invalid based on the spec,
2718  * but some samples need it to correct the DTS. */
2719  if (sc->stts_data[stts_index].duration < 0) {
2720  av_log(mov->fc, AV_LOG_WARNING,
2721  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
2722  sc->stts_data[stts_index].duration, stts_index,
2723  st->index);
2724  dts_correction += sc->stts_data[stts_index].duration - 1;
2725  sc->stts_data[stts_index].duration = 1;
2726  }
2727  current_dts += sc->stts_data[stts_index].duration;
2728  if (!dts_correction || current_dts + dts_correction > last_dts) {
2729  current_dts += dts_correction;
2730  dts_correction = 0;
2731  } else {
2732  /* Avoid creating non-monotonous DTS */
2733  dts_correction += current_dts - last_dts - 1;
2734  current_dts = last_dts + 1;
2735  }
2736  last_dts = current_dts;
2737  distance++;
2738  stts_sample++;
2739  current_sample++;
2740  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2741  stts_sample = 0;
2742  stts_index++;
2743  }
2744  }
2745  }
2746  if (st->duration > 0)
2747  st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2748  } else {
2749  unsigned chunk_samples, total = 0;
2750 
2751  // compute total chunk count
2752  for (i = 0; i < sc->stsc_count; i++) {
2753  unsigned count, chunk_count;
2754 
2755  chunk_samples = sc->stsc_data[i].count;
2756  if (i != sc->stsc_count - 1 &&
2757  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2758  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2759  return;
2760  }
2761 
2762  if (sc->samples_per_frame >= 160) { // gsm
2763  count = chunk_samples / sc->samples_per_frame;
2764  } else if (sc->samples_per_frame > 1) {
2765  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2766  count = (chunk_samples+samples-1) / samples;
2767  } else {
2768  count = (chunk_samples+1023) / 1024;
2769  }
2770 
2771  if (i < sc->stsc_count - 1)
2772  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2773  else
2774  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2775  total += chunk_count * count;
2776  }
2777 
2778  av_log(mov->fc, AV_LOG_TRACE, "chunk count %d\n", total);
2779  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2780  return;
2781  if (av_reallocp_array(&st->index_entries,
2782  st->nb_index_entries + total,
2783  sizeof(*st->index_entries)) < 0) {
2784  st->nb_index_entries = 0;
2785  return;
2786  }
2787  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2788 
2789  // populate index
2790  for (i = 0; i < sc->chunk_count; i++) {
2791  current_offset = sc->chunk_offsets[i];
2792  if (stsc_index + 1 < sc->stsc_count &&
2793  i + 1 == sc->stsc_data[stsc_index + 1].first)
2794  stsc_index++;
2795  chunk_samples = sc->stsc_data[stsc_index].count;
2796 
2797  while (chunk_samples > 0) {
2798  AVIndexEntry *e;
2799  unsigned size, samples;
2800 
2801  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
2802  avpriv_request_sample(mov->fc,
2803  "Zero bytes per frame, but %d samples per frame",
2804  sc->samples_per_frame);
2805  return;
2806  }
2807 
2808  if (sc->samples_per_frame >= 160) { // gsm
2809  samples = sc->samples_per_frame;
2810  size = sc->bytes_per_frame;
2811  } else {
2812  if (sc->samples_per_frame > 1) {
2813  samples = FFMIN((1024 / sc->samples_per_frame)*
2814  sc->samples_per_frame, chunk_samples);
2815  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2816  } else {
2817  samples = FFMIN(1024, chunk_samples);
2818  size = samples * sc->sample_size;
2819  }
2820  }
2821 
2822  if (st->nb_index_entries >= total) {
2823  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2824  return;
2825  }
2826  e = &st->index_entries[st->nb_index_entries++];
2827  e->pos = current_offset;
2828  e->timestamp = current_dts;
2829  e->size = size;
2830  e->min_distance = 0;
2831  e->flags = AVINDEX_KEYFRAME;
2832  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2833  "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2834  size, samples);
2835 
2836  current_offset += size;
2837  current_dts += samples;
2838  chunk_samples -= samples;
2839  }
2840  }
2841  }
2842 }
2843 
2844 static int test_same_origin(const char *src, const char *ref) {
2845  char src_proto[64];
2846  char ref_proto[64];
2847  char src_auth[256];
2848  char ref_auth[256];
2849  char src_host[256];
2850  char ref_host[256];
2851  int src_port=-1;
2852  int ref_port=-1;
2853 
2854  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
2855  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
2856 
2857  if (strlen(src) == 0) {
2858  return -1;
2859  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
2860  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
2861  strlen(src_host) + 1 >= sizeof(src_host) ||
2862  strlen(ref_host) + 1 >= sizeof(ref_host)) {
2863  return 0;
2864  } else if (strcmp(src_proto, ref_proto) ||
2865  strcmp(src_auth, ref_auth) ||
2866  strcmp(src_host, ref_host) ||
2867  src_port != ref_port) {
2868  return 0;
2869  } else
2870  return 1;
2871 }
2872 
2873 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref,
2874  AVIOInterruptCB *int_cb)
2875 {
2876  AVOpenCallback open_func = c->fc->open_cb;
2877 
2878  if (!open_func)
2879  open_func = ffio_open2_wrapper;
2880 
2881  /* try relative path, we do not try the absolute because it can leak information about our
2882  system to an attacker */
2883  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2884  char filename[1025];
2885  const char *src_path;
2886  int i, l;
2887 
2888  /* find a source dir */
2889  src_path = strrchr(src, '/');
2890  if (src_path)
2891  src_path++;
2892  else
2893  src_path = src;
2894 
2895  /* find a next level down to target */
2896  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2897  if (ref->path[l] == '/') {
2898  if (i == ref->nlvl_to - 1)
2899  break;
2900  else
2901  i++;
2902  }
2903 
2904  /* compose filename if next level down to target was found */
2905  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2906  memcpy(filename, src, src_path - src);
2907  filename[src_path - src] = 0;
2908 
2909  for (i = 1; i < ref->nlvl_from; i++)
2910  av_strlcat(filename, "../", sizeof(filename));
2911 
2912  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
2913  if (!c->use_absolute_path && !c->fc->open_cb) {
2914  int same_origin = test_same_origin(src, filename);
2915 
2916  if (!same_origin) {
2917  av_log(c->fc, AV_LOG_ERROR,
2918  "Reference with mismatching origin, %s not tried for security reasons, "
2919  "set demuxer option use_absolute_path to allow it anyway\n",
2920  ref->path);
2921  return AVERROR(ENOENT);
2922  }
2923 
2924  if(strstr(ref->path + l + 1, "..") ||
2925  strstr(ref->path + l + 1, ":") ||
2926  (ref->nlvl_from > 1 && same_origin < 0) ||
2927  (filename[0] == '/' && src_path == src))
2928  return AVERROR(ENOENT);
2929  }
2930 
2931  if (strlen(filename) + 1 == sizeof(filename))
2932  return AVERROR(ENOENT);
2933  if (!open_func(c->fc, pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2934  return 0;
2935  }
2936  } else if (c->use_absolute_path) {
2937  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
2938  "this is a possible security issue\n");
2939  if (!open_func(c->fc, pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2940  return 0;
2941  } else if (c->fc->open_cb) {
2942  if (!open_func(c->fc, pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2943  return 0;
2944  } else {
2945  av_log(c->fc, AV_LOG_ERROR,
2946  "Absolute path %s not tried for security reasons, "
2947  "set demuxer option use_absolute_path to allow absolute paths\n",
2948  ref->path);
2949  }
2950 
2951  return AVERROR(ENOENT);
2952 }
2953 
2954 static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
2955 {
2956  if (sc->time_scale <= 0) {
2957  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2958  sc->time_scale = c->time_scale;
2959  if (sc->time_scale <= 0)
2960  sc->time_scale = 1;
2961  }
2962 }
2963 
2964 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2965 {
2966  AVStream *st;
2967  MOVStreamContext *sc;
2968  int ret;
2969 
2970  st = avformat_new_stream(c->fc, NULL);
2971  if (!st) return AVERROR(ENOMEM);
2972  st->id = c->fc->nb_streams;
2973  sc = av_mallocz(sizeof(MOVStreamContext));
2974  if (!sc) return AVERROR(ENOMEM);
2975 
2976  st->priv_data = sc;
2977  st->codec->codec_type = AVMEDIA_TYPE_DATA;
2978  sc->ffindex = st->index;
2979 
2980  if ((ret = mov_read_default(c, pb, atom)) < 0)
2981  return ret;
2982 
2983  /* sanity checks */
2984  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2985  (!sc->sample_size && !sc->sample_count))) {
2986  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2987  st->index);
2988  return 0;
2989  }
2990 
2991  fix_timescale(c, sc);
2992 
2993  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2994 
2995  mov_build_index(c, st);
2996 
2997  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2998  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2999  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref,
3000  &c->fc->interrupt_callback) < 0)
3001  av_log(c->fc, AV_LOG_ERROR,
3002  "stream %d, error opening alias: path='%s', dir='%s', "
3003  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3004  st->index, dref->path, dref->dir, dref->filename,
3005  dref->volume, dref->nlvl_from, dref->nlvl_to);
3006  } else {
3007  sc->pb = c->fc->pb;
3008  sc->pb_is_copied = 1;
3009  }
3010 
3011  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3012  if (!st->sample_aspect_ratio.num && st->codec->width && st->codec->height &&
3013  sc->height && sc->width &&
3014  (st->codec->width != sc->width || st->codec->height != sc->height)) {
3015  st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
3016  ((double)st->codec->width * sc->height), INT_MAX);
3017  }
3018 
3019 #if FF_API_R_FRAME_RATE
3020  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3021  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
3022  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3023 #endif
3024  }
3025 
3026  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3027  if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
3028  TAG_IS_AVCI(st->codec->codec_tag)) {
3029  ret = ff_generate_avci_extradata(st);
3030  if (ret < 0)
3031  return ret;
3032  }
3033 
3034  switch (st->codec->codec_id) {
3035 #if CONFIG_H261_DECODER
3036  case AV_CODEC_ID_H261:
3037 #endif
3038 #if CONFIG_H263_DECODER
3039  case AV_CODEC_ID_H263:
3040 #endif
3041 #if CONFIG_MPEG4_DECODER
3042  case AV_CODEC_ID_MPEG4:
3043 #endif
3044  st->codec->width = 0; /* let decoder init width/height */
3045  st->codec->height= 0;
3046  break;
3047  }
3048 
3049  /* Do not need those anymore. */
3050  av_freep(&sc->chunk_offsets);
3051  av_freep(&sc->stsc_data);
3052  av_freep(&sc->sample_sizes);
3053  av_freep(&sc->keyframes);
3054  av_freep(&sc->stts_data);
3055  av_freep(&sc->stps_data);
3056  av_freep(&sc->elst_data);
3057  av_freep(&sc->rap_group);
3058 
3059  return 0;
3060 }
3061 
3062 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3063 {
3064  int ret;
3065  c->itunes_metadata = 1;
3066  ret = mov_read_default(c, pb, atom);
3067  c->itunes_metadata = 0;
3068  return ret;
3069 }
3070 
3071 static int mov_read_custom_2plus(MOVContext *c, AVIOContext *pb, int size)
3072 {
3073  int64_t end = avio_tell(pb) + size;
3074  uint8_t *key = NULL, *val = NULL;
3075  int i;
3076  AVStream *st;
3077  MOVStreamContext *sc;
3078 
3079  if (c->fc->nb_streams < 1)
3080  return 0;
3081  st = c->fc->streams[c->fc->nb_streams-1];
3082  sc = st->priv_data;
3083 
3084  for (i = 0; i < 2; i++) {
3085  uint8_t **p;
3086  uint32_t len, tag;
3087  int ret;
3088 
3089  if (end - avio_tell(pb) <= 12)
3090  break;
3091 
3092  len = avio_rb32(pb);
3093  tag = avio_rl32(pb);
3094  avio_skip(pb, 4); // flags
3095 
3096  if (len < 12 || len - 12 > end - avio_tell(pb))
3097  break;
3098  len -= 12;
3099 
3100  if (tag == MKTAG('n', 'a', 'm', 'e'))
3101  p = &key;
3102  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3103  avio_skip(pb, 4);
3104  len -= 4;
3105  p = &val;
3106  } else
3107  break;
3108 
3109  *p = av_malloc(len + 1);
3110  if (!*p)
3111  break;
3112  ret = ffio_read_size(pb, *p, len);
3113  if (ret < 0) {
3114  av_freep(p);
3115  return ret;
3116  }
3117  (*p)[len] = 0;
3118  }
3119 
3120  if (key && val) {
3121  if (strcmp(key, "iTunSMPB") == 0) {
3122  int priming, remainder, samples;
3123  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3124  if(priming>0 && priming<16384)
3125  sc->start_pad = priming;
3126  }
3127  }
3128  if (strcmp(key, "cdec") != 0) {
3129  av_dict_set(&c->fc->metadata, key, val,
3130  AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
3131  key = val = NULL;
3132  }
3133  }
3134 
3135  avio_seek(pb, end, SEEK_SET);
3136  av_freep(&key);
3137  av_freep(&val);
3138  return 0;
3139 }
3140 
3141 static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3142 {
3143  int64_t end = avio_tell(pb) + atom.size;
3144  uint32_t tag, len;
3145 
3146  if (atom.size < 8)
3147  goto fail;
3148 
3149  len = avio_rb32(pb);
3150  tag = avio_rl32(pb);
3151 
3152  if (len > atom.size)
3153  goto fail;
3154 
3155  if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
3156  uint8_t domain[128];
3157  int domain_len;
3158 
3159  avio_skip(pb, 4); // flags
3160  len -= 12;
3161 
3162  domain_len = avio_get_str(pb, len, domain, sizeof(domain));
3163  avio_skip(pb, len - domain_len);
3164  return mov_read_custom_2plus(c, pb, end - avio_tell(pb));
3165  }
3166 
3167 fail:
3168  av_log(c->fc, AV_LOG_VERBOSE,
3169  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3170  return 0;
3171 }
3172 
3173 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3174 {
3175  while (atom.size > 8) {
3176  uint32_t tag = avio_rl32(pb);
3177  atom.size -= 4;
3178  if (tag == MKTAG('h','d','l','r')) {
3179  avio_seek(pb, -8, SEEK_CUR);
3180  atom.size += 8;
3181  return mov_read_default(c, pb, atom);
3182  }
3183  }
3184  return 0;
3185 }
3186 
3187 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3188 {
3189  int i;
3190  int width;
3191  int height;
3192  int display_matrix[3][3];
3193  AVStream *st;
3194  MOVStreamContext *sc;
3195  int version;
3196  int flags;
3197 
3198  if (c->fc->nb_streams < 1)
3199  return 0;
3200  st = c->fc->streams[c->fc->nb_streams-1];
3201  sc = st->priv_data;
3202 
3203  version = avio_r8(pb);
3204  flags = avio_rb24(pb);
3205  st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
3206 
3207  if (version == 1) {
3208  avio_rb64(pb);
3209  avio_rb64(pb);
3210  } else {
3211  avio_rb32(pb); /* creation time */
3212  avio_rb32(pb); /* modification time */
3213  }
3214  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
3215  avio_rb32(pb); /* reserved */
3216 
3217  /* highlevel (considering edits) duration in movie timebase */
3218  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
3219  avio_rb32(pb); /* reserved */
3220  avio_rb32(pb); /* reserved */
3221 
3222  avio_rb16(pb); /* layer */
3223  avio_rb16(pb); /* alternate group */
3224  avio_rb16(pb); /* volume */
3225  avio_rb16(pb); /* reserved */
3226 
3227  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
3228  // they're kept in fixed point format through all calculations
3229  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
3230  // side data, but the scale factor is not needed to calculate aspect ratio
3231  for (i = 0; i < 3; i++) {
3232  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
3233  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
3234  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
3235  }
3236 
3237  width = avio_rb32(pb); // 16.16 fixed point track width
3238  height = avio_rb32(pb); // 16.16 fixed point track height
3239  sc->width = width >> 16;
3240  sc->height = height >> 16;
3241 
3242  // save the matrix and add rotate metadata when it is not the default
3243  // identity
3244  if (display_matrix[0][0] != (1 << 16) ||
3245  display_matrix[1][1] != (1 << 16) ||
3246  display_matrix[2][2] != (1 << 30) ||
3247  display_matrix[0][1] || display_matrix[0][2] ||
3248  display_matrix[1][0] || display_matrix[1][2] ||
3249  display_matrix[2][0] || display_matrix[2][1]) {
3250  int i, j;
3251  double rotate;
3252 
3253  av_freep(&sc->display_matrix);
3254  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
3255  if (!sc->display_matrix)
3256  return AVERROR(ENOMEM);
3257 
3258  for (i = 0; i < 3; i++)
3259  for (j = 0; j < 3; j++)
3260  sc->display_matrix[i * 3 + j] = display_matrix[i][j];
3261 
3262  rotate = av_display_rotation_get(sc->display_matrix);
3263  if (!isnan(rotate)) {
3264  char rotate_buf[64];
3265  rotate = -rotate;
3266  if (rotate < 0) // for backward compatibility
3267  rotate += 360;
3268  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
3269  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
3270  }
3271  }
3272 
3273  // transform the display width/height according to the matrix
3274  // to keep the same scale, use [width height 1<<16]
3275  if (width && height && sc->display_matrix) {
3276  double disp_transform[2];
3277 
3278 #define SQR(a) ((a)*(double)(a))
3279  for (i = 0; i < 2; i++)
3280  disp_transform[i] = sqrt(SQR(display_matrix[i][0]) + SQR(display_matrix[i][1]));
3281 
3282  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
3283  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
3284  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
3285  st->sample_aspect_ratio = av_d2q(
3286  disp_transform[0] / disp_transform[1],
3287  INT_MAX);
3288  }
3289  return 0;
3290 }
3291 
3292 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3293 {
3294  MOVFragment *frag = &c->fragment;
3295  MOVTrackExt *trex = NULL;
3296  MOVFragmentIndex* index = NULL;
3297  int flags, track_id, i;
3298 
3299  avio_r8(pb); /* version */
3300  flags = avio_rb24(pb);
3301 
3302  track_id = avio_rb32(pb);
3303  if (!track_id)
3304  return AVERROR_INVALIDDATA;
3305  frag->track_id = track_id;
3306  for (i = 0; i < c->trex_count; i++)
3307  if (c->trex_data[i].track_id == frag->track_id) {
3308  trex = &c->trex_data[i];
3309  break;
3310  }
3311  if (!trex) {
3312  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
3313  return AVERROR_INVALIDDATA;
3314  }
3315  for (i = 0; i < c->fragment_index_count; i++) {
3316  MOVFragmentIndex* candidate = c->fragment_index_data[i];
3317  if (candidate->track_id == frag->track_id) {
3318  av_log(c->fc, AV_LOG_DEBUG,
3319  "found fragment index for track %u\n", frag->track_id);
3320  index = candidate;
3321  break;
3322  }
3323  }
3324 
3325  frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
3326  avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
3327  frag->moof_offset : frag->implicit_offset;
3328  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
3329 
3330  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
3331  avio_rb32(pb) : trex->duration;
3332  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
3333  avio_rb32(pb) : trex->size;
3334  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
3335  avio_rb32(pb) : trex->flags;
3336  frag->time = AV_NOPTS_VALUE;
3337  if (index) {
3338  int i, found = 0;
3339  for (i = index->current_item; i < index->item_count; i++) {
3340  if (frag->implicit_offset == index->items[i].moof_offset) {
3341  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
3342  "for track %u and moof_offset %"PRId64"\n",
3343  frag->track_id, index->items[i].moof_offset);
3344  frag->time = index->items[i].time;
3345  index->current_item = i + 1;
3346  found = 1;
3347  }
3348  }
3349  if (!found) {
3350  av_log(c->fc, AV_LOG_WARNING, "track %u has a fragment index "
3351  "but it doesn't have an (in-order) entry for moof_offset "
3352  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
3353  }
3354  }
3355  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
3356  return 0;
3357 }
3358 
3359 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3360 {
3361  c->chapter_track = avio_rb32(pb);
3362  return 0;
3363 }
3364 
3365 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3366 {
3367  MOVTrackExt *trex;
3368  int err;
3369 
3370  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
3371  return AVERROR_INVALIDDATA;
3372  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
3373  sizeof(*c->trex_data))) < 0) {
3374  c->trex_count = 0;
3375  return err;
3376  }
3377 
3378  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
3379 
3380  trex = &c->trex_data[c->trex_count++];
3381  avio_r8(pb); /* version */
3382  avio_rb24(pb); /* flags */
3383  trex->track_id = avio_rb32(pb);
3384  trex->stsd_id = avio_rb32(pb);
3385  trex->duration = avio_rb32(pb);
3386  trex->size = avio_rb32(pb);
3387  trex->flags = avio_rb32(pb);
3388  return 0;
3389 }
3390 
3391 static int mov_read_tfdt(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3392 {
3393  MOVFragment *frag = &c->fragment;
3394  AVStream *st = NULL;
3395  MOVStreamContext *sc;
3396  int version, i;
3397 
3398  for (i = 0; i < c->fc->nb_streams; i++) {
3399  if (c->fc->streams[i]->id == frag->track_id) {
3400  st = c->fc->streams[i];
3401  break;
3402  }
3403  }
3404  if (!st) {
3405  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3406  return AVERROR_INVALIDDATA;
3407  }
3408  sc = st->priv_data;
3409  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
3410  return 0;
3411  version = avio_r8(pb);
3412  avio_rb24(pb); /* flags */
3413  if (version) {
3414  sc->track_end = avio_rb64(pb);
3415  } else {
3416  sc->track_end = avio_rb32(pb);
3417  }
3418  return 0;
3419 }
3420 
3421 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3422 {
3423  MOVFragment *frag = &c->fragment;
3424  AVStream *st = NULL;
3425  MOVStreamContext *sc;
3426  MOVStts *ctts_data;
3427  uint64_t offset;
3428  int64_t dts;
3429  int data_offset = 0;
3430  unsigned entries, first_sample_flags = frag->flags;
3431  int flags, distance, i, found_keyframe = 0, err;
3432 
3433  for (i = 0; i < c->fc->nb_streams; i++) {
3434  if (c->fc->streams[i]->id == frag->track_id) {
3435  st = c->fc->streams[i];
3436  break;
3437  }
3438  }
3439  if (!st) {
3440  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
3441  return AVERROR_INVALIDDATA;
3442  }
3443  sc = st->priv_data;
3444  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
3445  return 0;
3446  avio_r8(pb); /* version */
3447  flags = avio_rb24(pb);
3448  entries = avio_rb32(pb);
3449  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %d\n", flags, entries);
3450 
3451  /* Always assume the presence of composition time offsets.
3452  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
3453  * 1) in the initial movie, there are no samples.
3454  * 2) in the first movie fragment, there is only one sample without composition time offset.
3455  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
3456  if (!sc->ctts_count && sc->sample_count)
3457  {
3458  /* Complement ctts table if moov atom doesn't have ctts atom. */
3459  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
3460  if (!ctts_data)
3461  return AVERROR(ENOMEM);
3462  sc->ctts_data = ctts_data;
3463  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
3464  sc->ctts_data[sc->ctts_count].duration = 0;
3465  sc->ctts_count++;
3466  }
3467  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
3468  return AVERROR_INVALIDDATA;
3469  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
3470  sizeof(*sc->ctts_data))) < 0) {
3471  sc->ctts_count = 0;
3472  return err;
3473  }
3474  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
3475  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
3476  dts = sc->track_end - sc->time_offset;
3477  offset = frag->base_data_offset + data_offset;
3478  distance = 0;
3479  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
3480  for (i = 0; i < entries && !pb->eof_reached; i++) {
3481  unsigned sample_size = frag->size;
3482  int sample_flags = i ? frag->flags : first_sample_flags;
3483  unsigned sample_duration = frag->duration;
3484  int keyframe = 0;
3485 
3486  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
3487  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
3488  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
3489  sc->ctts_data[sc->ctts_count].count = 1;
3490  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
3491  avio_rb32(pb) : 0;
3492  mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
3493  if (frag->time != AV_NOPTS_VALUE) {
3494  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
3495  int64_t pts = frag->time;
3496  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3497  " sc->dts_shift %d ctts.duration %d"
3498  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
3499  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
3500  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
3501  dts = pts - sc->dts_shift;
3502  if (flags & MOV_TRUN_SAMPLE_CTS) {
3503  dts -= sc->ctts_data[sc->ctts_count].duration;
3504  } else {
3505  dts -= sc->time_offset;
3506  }
3507  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
3508  } else {
3509  dts = frag->time;
3510  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
3511  ", using it for dts\n", dts);
3512  }
3513  frag->time = AV_NOPTS_VALUE;
3514  }
3515  sc->ctts_count++;
3516  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3517  keyframe = 1;
3518  else if (!found_keyframe)
3519  keyframe = found_keyframe =
3520  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
3521  MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
3522  if (keyframe)
3523  distance = 0;
3524  err = av_add_index_entry(st, offset, dts, sample_size, distance,
3525  keyframe ? AVINDEX_KEYFRAME : 0);
3526  if (err < 0) {
3527  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
3528  }
3529  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
3530  "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
3531  offset, dts, sample_size, distance, keyframe);
3532  distance++;
3533  dts += sample_duration;
3534  offset += sample_size;
3535  sc->data_size += sample_size;
3536  sc->duration_for_fps += sample_duration;
3537  sc->nb_frames_for_fps ++;
3538  }
3539 
3540  if (pb->eof_reached)
3541  return AVERROR_EOF;
3542 
3543  frag->implicit_offset = offset;
3544  st->duration = sc->track_end = dts + sc->time_offset;
3545  return 0;
3546 }
3547 
3548 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
3549 /* like the files created with Adobe Premiere 5.0, for samples see */
3550 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
3551 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3552 {
3553  int err;
3554 
3555  if (atom.size < 8)
3556  return 0; /* continue */
3557  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
3558  avio_skip(pb, atom.size - 4);
3559  return 0;
3560  }
3561  atom.type = avio_rl32(pb);
3562  atom.size -= 8;
3563  if (atom.type != MKTAG('m','d','a','t')) {
3564  avio_skip(pb, atom.size);
3565  return 0;
3566  }
3567  err = mov_read_mdat(c, pb, atom);
3568  return err;
3569 }
3570 
3571 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3572 {
3573 #if CONFIG_ZLIB
3574  AVIOContext ctx;
3575  uint8_t *cmov_data;
3576  uint8_t *moov_data; /* uncompressed data */
3577  long cmov_len, moov_len;
3578  int ret = -1;
3579 
3580  avio_rb32(pb); /* dcom atom */
3581  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
3582  return AVERROR_INVALIDDATA;
3583  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
3584  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
3585  return AVERROR_INVALIDDATA;
3586  }
3587  avio_rb32(pb); /* cmvd atom */
3588  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
3589  return AVERROR_INVALIDDATA;
3590  moov_len = avio_rb32(pb); /* uncompressed size */
3591  cmov_len = atom.size - 6 * 4;
3592 
3593  cmov_data = av_malloc(cmov_len);
3594  if (!cmov_data)
3595  return AVERROR(ENOMEM);
3596  moov_data = av_malloc(moov_len);
3597  if (!moov_data) {
3598  av_free(cmov_data);
3599  return AVERROR(ENOMEM);
3600  }
3601  ret = ffio_read_size(pb, cmov_data, cmov_len);
3602  if (ret < 0)
3603  goto free_and_return;
3604 
3605  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
3606  goto free_and_return;
3607  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
3608  goto free_and_return;
3609  ctx.seekable = AVIO_SEEKABLE_NORMAL;
3610  atom.type = MKTAG('m','o','o','v');
3611  atom.size = moov_len;
3612  ret = mov_read_default(c, &ctx, atom);
3613 free_and_return:
3614  av_free(moov_data);
3615  av_free(cmov_data);
3616  return ret;
3617 #else
3618  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
3619  return AVERROR(ENOSYS);
3620 #endif
3621 }
3622 
3623 /* edit list atom */
3624 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3625 {
3626  MOVStreamContext *sc;
3627  int i, edit_count, version;
3628 
3629  if (c->fc->nb_streams < 1 || c->ignore_editlist)
3630  return 0;
3631  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
3632 
3633  version = avio_r8(pb); /* version */
3634  avio_rb24(pb); /* flags */
3635  edit_count = avio_rb32(pb); /* entries */
3636 
3637  if (!edit_count)
3638  return 0;
3639  if (sc->elst_data)
3640  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
3641  av_free(sc->elst_data);
3642  sc->elst_count = 0;
3643  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
3644  if (!sc->elst_data)
3645  return AVERROR(ENOMEM);
3646 
3647  av_log(c->fc, AV_LOG_TRACE, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3648  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
3649  MOVElst *e = &sc->elst_data[i];
3650 
3651  if (version == 1) {
3652  e->duration = avio_rb64(pb);
3653  e->time = avio_rb64(pb);
3654  } else {
3655  e->duration = avio_rb32(pb); /* segment duration */
3656  e->time = (int32_t)avio_rb32(pb); /* media time */
3657  }
3658  e->rate = avio_rb32(pb) / 65536.0;
3659  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3660  e->duration, e->time, e->rate);
3661  }
3662  sc->elst_count = i;
3663 
3664  return 0;
3665 }
3666 
3667 static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3668 {
3669  MOVStreamContext *sc;
3670 
3671  if (c->fc->nb_streams < 1)
3672  return AVERROR_INVALIDDATA;
3673  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3674  sc->timecode_track = avio_rb32(pb);
3675  return 0;
3676 }
3677 
3678 static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3679 {
3680  int ret;
3681  uint8_t uuid[16];
3682  static const uint8_t uuid_isml_manifest[] = {
3683  0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3684  0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3685  };
3686 
3687  if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3688  return AVERROR_INVALIDDATA;
3689 
3690  ret = avio_read(pb, uuid, sizeof(uuid));
3691  if (ret < 0) {
3692  return ret;
3693  } else if (ret != sizeof(uuid)) {
3694  return AVERROR_INVALIDDATA;
3695  }
3696  if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3697  uint8_t *buffer, *ptr;
3698  char *endptr;
3699  size_t len = atom.size - sizeof(uuid);
3700 
3701  if (len < 4) {
3702  return AVERROR_INVALIDDATA;
3703  }
3704  ret = avio_skip(pb, 4); // zeroes
3705  len -= 4;
3706 
3707  buffer = av_mallocz(len + 1);
3708  if (!buffer) {
3709  return AVERROR(ENOMEM);
3710  }
3711  ret = avio_read(pb, buffer, len);
3712  if (ret < 0) {
3713  av_free(buffer);
3714  return ret;
3715  } else if (ret != len) {
3716  av_free(buffer);
3717  return AVERROR_INVALIDDATA;
3718  }
3719 
3720  ptr = buffer;
3721  while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
3722  ptr += sizeof("systemBitrate=\"") - 1;
3723  c->bitrates_count++;
3724  c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3725  if (!c->bitrates) {
3726  c->bitrates_count = 0;
3727  av_free(buffer);
3728  return AVERROR(ENOMEM);
3729  }
3730  errno = 0;
3731  ret = strtol(ptr, &endptr, 10);
3732  if (ret < 0 || errno || *endptr != '"') {
3733  c->bitrates[c->bitrates_count - 1] = 0;
3734  } else {
3735  c->bitrates[c->bitrates_count - 1] = ret;
3736  }
3737  }
3738 
3739  av_free(buffer);
3740  }
3741  return 0;
3742 }
3743 
3744 static int mov_read_free(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3745 {
3746  int ret;
3747  uint8_t content[16];
3748 
3749  if (atom.size < 8)
3750  return 0;
3751 
3752  ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
3753  if (ret < 0)
3754  return ret;
3755 
3756  if ( !c->found_moov
3757  && !c->found_mdat
3758  && !memcmp(content, "Anevia\x1A\x1A", 8)
3759  && c->use_mfra_for == FF_MOV_FLAG_MFRA_AUTO) {
3760  c->use_mfra_for = FF_MOV_FLAG_MFRA_PTS;
3761  }
3762 
3763  return 0;
3764 }
3765 
3766 static const MOVParseTableEntry mov_default_parse_table[] = {
3767 { MKTAG('A','C','L','R'), mov_read_aclr },
3768 { MKTAG('A','P','R','G'), mov_read_avid },
3769 { MKTAG('A','A','L','P'), mov_read_avid },
3770 { MKTAG('A','R','E','S'), mov_read_ares },
3771 { MKTAG('a','v','s','s'), mov_read_avss },
3772 { MKTAG('c','h','p','l'), mov_read_chpl },
3773 { MKTAG('c','o','6','4'), mov_read_stco },
3774 { MKTAG('c','o','l','r'), mov_read_colr },
3775 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
3776 { MKTAG('d','i','n','f'), mov_read_default },
3777 { MKTAG('D','p','x','E'), mov_read_dpxe },
3778 { MKTAG('d','r','e','f'), mov_read_dref },
3779 { MKTAG('e','d','t','s'), mov_read_default },
3780 { MKTAG('e','l','s','t'), mov_read_elst },
3781 { MKTAG('e','n','d','a'), mov_read_enda },
3782 { MKTAG('f','i','e','l'), mov_read_fiel },
3783 { MKTAG('a','d','r','m'), mov_read_adrm },
3784 { MKTAG('f','t','y','p'), mov_read_ftyp },
3785 { MKTAG('g','l','b','l'), mov_read_glbl },
3786 { MKTAG('h','d','l','r'), mov_read_hdlr },
3787 { MKTAG('i','l','s','t'), mov_read_ilst },
3788 { MKTAG('j','p','2','h'), mov_read_jp2h },
3789 { MKTAG('m','d','a','t'), mov_read_mdat },
3790 { MKTAG('m','d','h','d'), mov_read_mdhd },
3791 { MKTAG('m','d','i','a'), mov_read_default },
3792 { MKTAG('m','e','t','a'), mov_read_meta },
3793 { MKTAG('m','i','n','f'), mov_read_default },
3794 { MKTAG('m','o','o','f'), mov_read_moof },
3795 { MKTAG('m','o','o','v'), mov_read_moov },
3796 { MKTAG('m','v','e','x'), mov_read_default },
3797 { MKTAG('m','v','h','d'), mov_read_mvhd },
3798 { MKTAG('S','M','I',' '), mov_read_svq3 },
3799 { MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
3800 { MKTAG('a','v','c','C'), mov_read_glbl },
3801 { MKTAG('p','a','s','p'), mov_read_pasp },
3802 { MKTAG('s','t','b','l'), mov_read_default },
3803 { MKTAG('s','t','c','o'), mov_read_stco },
3804 { MKTAG('s','t','p','s'), mov_read_stps },
3805 { MKTAG('s','t','r','f'), mov_read_strf },
3806 { MKTAG('s','t','s','c'), mov_read_stsc },
3807 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
3808 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
3809 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
3810 { MKTAG('s','t','t','s'), mov_read_stts },
3811 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
3812 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
3813 { MKTAG('t','f','d','t'), mov_read_tfdt },
3814 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
3815 { MKTAG('t','r','a','k'), mov_read_trak },
3816 { MKTAG('t','r','a','f'), mov_read_default },
3817 { MKTAG('t','r','e','f'), mov_read_default },
3818 { MKTAG('t','m','c','d'), mov_read_tmcd },
3819 { MKTAG('c','h','a','p'), mov_read_chap },
3820 { MKTAG('t','r','e','x'), mov_read_trex },
3821 { MKTAG('t','r','u','n'), mov_read_trun },
3822 { MKTAG('u','d','t','a'), mov_read_default },
3823 { MKTAG('w','a','v','e'), mov_read_wave },
3824 { MKTAG('e','s','d','s'), mov_read_esds },
3825 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
3826 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
3827 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
3828 { MKTAG('w','f','e','x'), mov_read_wfex },
3829 { MKTAG('c','m','o','v'), mov_read_cmov },
3830 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
3831 { MKTAG('d','v','c','1'), mov_read_dvc1 },
3832 { MKTAG('s','b','g','p'), mov_read_sbgp },
3833 { MKTAG('h','v','c','C'), mov_read_glbl },
3834 { MKTAG('u','u','i','d'), mov_read_uuid },
3835 { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
3836 { MKTAG('f','r','e','e'), mov_read_free },
3837 { MKTAG('-','-','-','-'), mov_read_custom },
3838 { 0, NULL }
3839 };
3840 
3841 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3842 {
3843  int64_t total_size = 0;
3844  MOVAtom a;
3845  int i;
3846 
3847  if (c->atom_depth > 10) {
3848  av_log(c->fc, AV_LOG_ERROR, "Atoms too deeply nested\n");
3849  return AVERROR_INVALIDDATA;
3850  }
3851  c->atom_depth ++;
3852 
3853  if (atom.size < 0)
3854  atom.size = INT64_MAX;
3855  while (total_size + 8 <= atom.size && !avio_feof(pb)) {
3856  int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
3857  a.size = atom.size;
3858  a.type=0;
3859  if (atom.size >= 8) {
3860  a.size = avio_rb32(pb);
3861  a.type = avio_rl32(pb);
3862  if (a.type == MKTAG('f','r','e','e') &&
3863  a.size >= 8 &&
3864  c->moov_retry) {
3865  uint8_t buf[8];
3866  uint32_t *type = (uint32_t *)buf + 1;
3867  if (avio_read(pb, buf, 8) != 8)
3868  return AVERROR_INVALIDDATA;
3869  avio_seek(pb, -8, SEEK_CUR);
3870  if (*type == MKTAG('m','v','h','d') ||
3871  *type == MKTAG('c','m','o','v')) {
3872  av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
3873  a.type = MKTAG('m','o','o','v');
3874  }
3875  }
3876  if (atom.type != MKTAG('r','o','o','t') &&
3877  atom.type != MKTAG('m','o','o','v'))
3878  {
3879  if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
3880  {
3881  av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
3882  avio_skip(pb, -8);
3883  c->atom_depth --;
3884  return 0;
3885  }
3886  }
3887  total_size += 8;
3888  if (a.size == 1 && total_size + 8 <= atom.size) { /* 64 bit extended size */
3889  a.size = avio_rb64(pb) - 8;
3890  total_size += 8;
3891  }
3892  }
3893  av_log(c->fc, AV_LOG_TRACE, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3894  a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3895  if (a.size == 0) {
3896  a.size = atom.size - total_size + 8;
3897  }
3898  a.size -= 8;
3899  if (a.size < 0)
3900  break;
3901  a.size = FFMIN(a.size, atom.size - total_size);
3902 
3903  for (i = 0; mov_default_parse_table[i].type; i++)
3904  if (mov_default_parse_table[i].type == a.type) {
3905  parse = mov_default_parse_table[i].parse;
3906  break;
3907  }
3908 
3909  // container is user data
3910  if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3911  atom.type == MKTAG('i','l','s','t')))
3912  parse = mov_read_udta_string;
3913 
3914  if (!parse) { /* skip leaf atoms data */
3915  avio_skip(pb, a.size);
3916  } else {
3917  int64_t start_pos = avio_tell(pb);
3918  int64_t left;
3919  int err = parse(c, pb, a);
3920  if (err < 0) {
3921  c->atom_depth --;
3922  return err;
3923  }
3924  if (c->found_moov && c->found_mdat &&
3925  ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3926  start_pos + a.size == avio_size(pb))) {
3927  if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3928  c->next_root_atom = start_pos + a.size;
3929  c->atom_depth --;
3930  return 0;
3931  }
3932  left = a.size - avio_tell(pb) + start_pos;
3933  if (left > 0) /* skip garbage at atom end */
3934  avio_skip(pb, left);
3935  else if (left < 0) {
3936  av_log(c->fc, AV_LOG_WARNING,
3937  "overread end of atom '%.4s' by %"PRId64" bytes\n",
3938  (char*)&a.type, -left);
3939  avio_seek(pb, left, SEEK_CUR);
3940  }
3941  }
3942 
3943  total_size += a.size;
3944  }
3945 
3946  if (total_size < atom.size && atom.size < 0x7ffff)
3947  avio_skip(pb, atom.size - total_size);
3948 
3949  c->atom_depth --;
3950  return 0;
3951 }
3952 
3953 static int mov_probe(AVProbeData *p)
3954 {
3955  int64_t offset;
3956  uint32_t tag;
3957  int score = 0;
3958  int moov_offset = -1;
3959 
3960  /* check file header */
3961  offset = 0;
3962  for (;;) {
3963  /* ignore invalid offset */
3964  if ((offset + 8) > (unsigned int)p->buf_size)
3965  break;
3966  tag = AV_RL32(p->buf + offset + 4);
3967  switch(tag) {
3968  /* check for obvious tags */
3969  case MKTAG('m','o','o','v'):
3970  moov_offset = offset + 4;
3971  case MKTAG('m','d','a','t'):
3972  case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3973  case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3974  case MKTAG('f','t','y','p'):
3975  if (AV_RB32(p->buf+offset) < 8 &&
3976  (AV_RB32(p->buf+offset) != 1 ||
3977  offset + 12 > (unsigned int)p->buf_size ||
3978  AV_RB64(p->buf+offset + 8) == 0)) {
3979  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3980  } else if (tag == MKTAG('f','t','y','p') &&
3981  ( AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')
3982  || AV_RL32(p->buf + offset + 8) == MKTAG('j','p','x',' ')
3983  )) {
3984  score = FFMAX(score, 5);
3985  } else {
3986  score = AVPROBE_SCORE_MAX;
3987  }
3988  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3989  break;
3990  /* those are more common words, so rate then a bit less */
3991  case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3992  case MKTAG('w','i','d','e'):
3993  case MKTAG('f','r','e','e'):
3994  case MKTAG('j','u','n','k'):
3995  case MKTAG('p','i','c','t'):
3996  score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3997  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3998  break;
3999  case MKTAG(0x82,0x82,0x7f,0x7d):
4000  case MKTAG('s','k','i','p'):
4001  case MKTAG('u','u','i','d'):
4002  case MKTAG('p','r','f','l'):
4003  /* if we only find those cause probedata is too small at least rate them */
4004  score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
4005  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4006  break;
4007  default:
4008  offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
4009  }
4010  }
4011  if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
4012  /* moov atom in the header - we should make sure that this is not a
4013  * MOV-packed MPEG-PS */
4014  offset = moov_offset;
4015 
4016  while(offset < (p->buf_size - 16)){ /* Sufficient space */
4017  /* We found an actual hdlr atom */
4018  if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
4019  AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
4020  AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
4021  av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
4022  /* We found a media handler reference atom describing an
4023  * MPEG-PS-in-MOV, return a
4024  * low score to force expanding the probe window until
4025  * mpegps_probe finds what it needs */
4026  return 5;
4027  }else
4028  /* Keep looking */
4029  offset+=2;
4030  }
4031  }
4032 
4033  return score;
4034 }
4035 
4036 // must be done after parsing all trak because there's no order requirement
4037 static void mov_read_chapters(AVFormatContext *s)
4038 {
4039  MOVContext *mov = s->priv_data;
4040  AVStream *st = NULL;
4041  MOVStreamContext *sc;
4042  int64_t cur_pos;
4043  int i;
4044 
4045  for (i = 0; i < s->nb_streams; i++)
4046  if (s->streams[i]->id == mov->chapter_track) {
4047  st = s->streams[i];
4048  break;
4049  }
4050  if (!st) {
4051  av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
4052  return;
4053  }
4054 
4055  st->discard = AVDISCARD_ALL;
4056  sc = st->priv_data;
4057  cur_pos = avio_tell(sc->pb);
4058 
4059  for (i = 0; i < st->nb_index_entries; i++) {
4060  AVIndexEntry *sample = &st->index_entries[i];
4061  int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
4062  uint8_t *title;
4063  uint16_t ch;
4064  int len, title_len;
4065 
4066  if (end < sample->timestamp) {
4067  av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
4068  end = AV_NOPTS_VALUE;
4069  }
4070 
4071  if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
4072  av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
4073  goto finish;
4074  }
4075 
4076  // the first two bytes are the length of the title
4077  len = avio_rb16(sc->pb);
4078  if (len > sample->size-2)
4079  continue;
4080  title_len = 2*len + 1;
4081  if (!(title = av_mallocz(title_len)))
4082  goto finish;
4083 
4084  // The samples could theoretically be in any encoding if there's an encd
4085  // atom following, but in practice are only utf-8 or utf-16, distinguished
4086  // instead by the presence of a BOM
4087  if (!len) {
4088  title[0] = 0;
4089  } else {
4090  ch = avio_rb16(sc->pb);
4091  if (ch == 0xfeff)
4092  avio_get_str16be(sc->pb, len, title, title_len);
4093  else if (ch == 0xfffe)
4094  avio_get_str16le(sc->pb, len, title, title_len);
4095  else {
4096  AV_WB16(title, ch);
4097  if (len == 1 || len == 2)
4098  title[len] = 0;
4099  else
4100  avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
4101  }
4102  }
4103 
4104  avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
4105  av_freep(&title);
4106  }
4107 finish:
4108  avio_seek(sc->pb, cur_pos, SEEK_SET);
4109 }
4110 
4111 static int parse_timecode_in_framenum_format(AVFormatContext *s, AVStream *st,
4112  uint32_t value, int flags)
4113 {
4114  AVTimecode tc;
4115  char buf[AV_TIMECODE_STR_SIZE];
4116  AVRational rate = {st->codec->time_base.den,
4117  st->codec->time_base.num};
4118  int ret = av_timecode_init(&tc, rate, flags, 0, s);
4119  if (ret < 0)
4120  return ret;
4121  av_dict_set(&st->metadata, "timecode",
4122  av_timecode_make_string(&tc, buf, value), 0);
4123  return 0;
4124 }
4125 
4126 static int mov_read_timecode_track(AVFormatContext *s, AVStream *st)
4127 {
4128  MOVStreamContext *sc = st->priv_data;
4129  int flags = 0;
4130  int64_t cur_pos = avio_tell(sc->pb);
4131  uint32_t value;
4132 
4133  if (!st->nb_index_entries)
4134  return -1;
4135 
4136  avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
4137  value = avio_rb32(s->pb);
4138 
4139  if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
4140  if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
4141  if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
4142 
4143  /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
4144  * not the case) and thus assume "frame number format" instead of QT one.
4145  * No sample with tmcd track can be found with a QT timecode at the moment,
4146  * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
4147  * format). */
4148  parse_timecode_in_framenum_format(s, st, value, flags);
4149 
4150  avio_seek(sc->pb, cur_pos, SEEK_SET);
4151  return 0;
4152 }
4153 
4154 static int mov_read_close(AVFormatContext *s)
4155 {
4156  MOVContext *mov = s->priv_data;
4157  int i, j;
4158 
4159  for (i = 0; i < s->nb_streams; i++) {
4160  AVStream *st = s->streams[i];
4161  MOVStreamContext *sc = st->priv_data;
4162 
4163  if (!sc)
4164  continue;
4165 
4166  av_freep(&sc->ctts_data);
4167  for (j = 0; j < sc->drefs_count; j++) {
4168  av_freep(&sc->drefs[j].path);
4169  av_freep(&sc->drefs[j].dir);
4170  }
4171  av_freep(&sc->drefs);
4172 
4173  sc->drefs_count = 0;
4174 
4175  if (!sc->pb_is_copied)
4176  avio_closep(&sc->pb);
4177 
4178  sc->pb = NULL;
4179  av_freep(&sc->chunk_offsets);
4180  av_freep(&sc->stsc_data);
4181  av_freep(&sc->sample_sizes);
4182  av_freep(&sc->keyframes);
4183  av_freep(&sc->stts_data);
4184  av_freep(&sc->stps_data);
4185  av_freep(&sc->elst_data);
4186  av_freep(&sc->rap_group);
4187  av_freep(&sc->display_matrix);
4188  }
4189 
4190  if (mov->dv_demux) {
4191  avformat_free_context(mov->dv_fctx);
4192  mov->dv_fctx = NULL;
4193  }
4194 
4195  av_freep(&mov->trex_data);
4196  av_freep(&mov->bitrates);
4197 
4198  for (i = 0; i < mov->fragment_index_count; i++) {
4199  MOVFragmentIndex* index = mov->fragment_index_data[i];
4200  av_freep(&index->items);
4201  av_freep(&mov->fragment_index_data[i]);
4202  }
4203  av_freep(&mov->fragment_index_data);
4204 
4205  av_freep(&mov->aes_decrypt);
4206 
4207  return 0;
4208 }
4209 
4210 static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
4211 {
4212  int i;
4213 
4214  for (i = 0; i < s->nb_streams; i++) {
4215  AVStream *st = s->streams[i];
4216  MOVStreamContext *sc = st->priv_data;
4217 
4218  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
4219  sc->timecode_track == tmcd_id)
4220  return 1;
4221  }
4222  return 0;
4223 }
4224 
4225 /* look for a tmcd track not referenced by any video track, and export it globally */
4226 static void export_orphan_timecode(AVFormatContext *s)
4227 {
4228  int i;
4229 
4230  for (i = 0; i < s->nb_streams; i++) {
4231  AVStream *st = s->streams[i];
4232 
4233  if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
4234  !tmcd_is_referenced(s, i + 1)) {
4235  AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
4236  if (tcr) {
4237  av_dict_set(&s->metadata, "timecode", tcr->value, 0);
4238  break;
4239  }
4240  }
4241  }
4242 }
4243 
4244 static int read_tfra(MOVContext *mov, AVIOContext *f)
4245 {
4246  MOVFragmentIndex* index = NULL;
4247  int version, fieldlength, i, j;
4248  int64_t pos = avio_tell(f);
4249  uint32_t size = avio_rb32(f);
4250  void *tmp;
4251 
4252  if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a')) {
4253  return 1;
4254  }
4255  av_log(mov->fc, AV_LOG_VERBOSE, "found tfra\n");
4256  index = av_mallocz(sizeof(MOVFragmentIndex));
4257  if (!index) {
4258  return AVERROR(ENOMEM);
4259  }
4260 
4261  tmp = av_realloc_array(mov->fragment_index_data,
4262  mov->fragment_index_count + 1,
4263  sizeof(MOVFragmentIndex*));
4264  if (!tmp) {
4265  av_freep(&index);
4266  return AVERROR(ENOMEM);
4267  }
4268  mov->fragment_index_data = tmp;
4269  mov->fragment_index_data[mov->fragment_index_count++] = index;
4270 
4271  version = avio_r8(f);
4272  avio_rb24(f);
4273  index->track_id = avio_rb32(f);
4274  fieldlength = avio_rb32(f);
4275  index->item_count = avio_rb32(f);
4276  index->items = av_mallocz_array(
4277  index->item_count, sizeof(MOVFragmentIndexItem));
4278  if (!index->items) {
4279  index->item_count = 0;
4280  return AVERROR(ENOMEM);
4281  }
4282  for (i = 0; i < index->item_count; i++) {
4283  int64_t time, offset;
4284  if (version == 1) {
4285  time = avio_rb64(f);
4286  offset = avio_rb64(f);
4287  } else {
4288  time = avio_rb32(f);
4289  offset = avio_rb32(f);
4290  }
4291  index->items[i].time = time;
4292  index->items[i].moof_offset = offset;
4293  for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
4294  avio_r8(f);
4295  for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
4296  avio_r8(f);
4297  for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
4298  avio_r8(f);
4299  }
4300 
4301  avio_seek(f, pos + size, SEEK_SET);
4302  return 0;
4303 }
4304 
4305 static int mov_read_mfra(MOVContext *c, AVIOContext *f)
4306 {
4307  int64_t stream_size = avio_size(f);
4308  int64_t original_pos = avio_tell(f);
4309  int64_t seek_ret;
4310  int32_t mfra_size;
4311  int ret = -1;
4312  if ((seek_ret = avio_seek(f, stream_size - 4, SEEK_SET)) < 0) {
4313  ret = seek_ret;
4314  goto fail;
4315  }
4316  mfra_size = avio_rb32(f);
4317  if (mfra_size < 0 || mfra_size > stream_size) {
4318  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (unreasonable size)\n");
4319  goto fail;
4320  }
4321  if ((seek_ret = avio_seek(f, -mfra_size, SEEK_CUR)) < 0) {
4322  ret = seek_ret;
4323  goto fail;
4324  }
4325  if (avio_rb32(f) != mfra_size) {
4326  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (size mismatch)\n");
4327  goto fail;
4328  }
4329  if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
4330  av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (tag mismatch)\n");
4331  goto fail;
4332  }
4333  av_log(c->fc, AV_LOG_VERBOSE, "stream has mfra\n");
4334  do {
4335  ret = read_tfra(c, f);
4336  if (ret < 0)
4337  goto fail;
4338  } while (!ret);
4339  ret = 0;
4340 fail:
4341  seek_ret = avio_seek(f, original_pos, SEEK_SET);
4342  if (seek_ret < 0) {
4343  av_log(c->fc, AV_LOG_ERROR,
4344  "failed to seek back after looking for mfra\n");
4345  ret = seek_ret;
4346  }
4347  return ret;
4348 }
4349 
4350 static int mov_read_header(AVFormatContext *s)
4351 {
4352  MOVContext *mov = s->priv_data;
4353  AVIOContext *pb = s->pb;
4354  int j, err;
4355  MOVAtom atom = { AV_RL32("root") };
4356  int i;
4357 
4358  mov->fc = s;
4359  /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
4360  if (pb->seekable)
4361  atom.size = avio_size(pb);
4362  else
4363  atom.size = INT64_MAX;
4364 
4365  /* check MOV header */
4366  do {
4367  if (mov->moov_retry)
4368  avio_seek(pb, 0, SEEK_SET);
4369  if ((err = mov_read_default(mov, pb, atom)) < 0) {
4370  av_log(s, AV_LOG_ERROR, "error reading header\n");
4371  mov_read_close(s);
4372  return err;
4373  }
4374  } while (pb->seekable && !mov->found_moov && !mov->moov_retry++);
4375  if (!mov->found_moov) {
4376  av_log(s, AV_LOG_ERROR, "moov atom not found\n");
4377  mov_read_close(s);
4378  return AVERROR_INVALIDDATA;
4379  }
4380  av_log(mov->fc, AV_LOG_TRACE, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
4381 
4382  if (pb->seekable) {
4383  if (mov->chapter_track > 0)
4384  mov_read_chapters(s);
4385  for (i = 0; i < s->nb_streams; i++)
4386  if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
4387  mov_read_timecode_track(s, s->streams[i]);
4388  }
4389 
4390  /* copy timecode metadata from tmcd tracks to the related video streams */
4391  for (i = 0; i < s->nb_streams; i++) {
4392  AVStream *st = s->streams[i];
4393  MOVStreamContext *sc = st->priv_data;
4394  if (sc->timecode_track > 0) {
4395  AVDictionaryEntry *tcr;
4396  int tmcd_st_id = -1;
4397 
4398  for (j = 0; j < s->nb_streams; j++)
4399  if (s->streams[j]->id == sc->timecode_track)
4400  tmcd_st_id = j;
4401 
4402  if (tmcd_st_id < 0 || tmcd_st_id == i)
4403  continue;
4404  tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
4405  if (tcr)
4406  av_dict_set(&st->metadata, "timecode", tcr->value, 0);
4407  }
4408  }
4409  export_orphan_timecode(s);
4410 
4411  for (i = 0; i < s->nb_streams; i++) {
4412  AVStream *st = s->streams[i];
4413  MOVStreamContext *sc = st->priv_data;
4414  fix_timescale(mov, sc);
4415  if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_AAC) {
4416  st->skip_samples = sc->start_pad;
4417  }
4418  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
4419  av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
4420  sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
4421  if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
4422  if (st->codec->width <= 0 || st->codec->height <= 0) {
4423  st->codec->width = sc->width;
4424  st->codec->height = sc->height;
4425  }
4426  if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
4427  if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
4428  return err;
4429  }
4430  }
4431  }
4432 
4433  if (mov->trex_data) {
4434  for (i = 0; i < s->nb_streams; i++) {
4435  AVStream *st = s->streams[i];
4436  MOVStreamContext *sc = st->priv_data;
4437  if (st->duration > 0)
4438  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
4439  }
4440  }
4441 
4442  if (mov->use_mfra_for > 0) {
4443  for (i = 0; i < s->nb_streams; i++) {
4444  AVStream *st = s->streams[i];
4445  MOVStreamContext *sc = st->priv_data;
4446  if (sc->duration_for_fps > 0) {
4447  st->codec->bit_rate = sc->data_size * 8 * sc->time_scale /
4448  sc->duration_for_fps;
4449  }
4450  }
4451  }
4452 
4453  for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
4454  if (mov->bitrates[i]) {
4455  s->streams[i]->codec->bit_rate = mov->bitrates[i];
4456  }
4457  }
4458 
4459  ff_rfps_calculate(s);
4460 
4461  for (i = 0; i < s->nb_streams; i++) {
4462  AVStream *st = s->streams[i];
4463  MOVStreamContext *sc = st->priv_data;
4464 
4465  switch (st->codec->codec_type) {
4466  case AVMEDIA_TYPE_AUDIO:
4467  err = ff_replaygain_export(st, s->metadata);
4468  if (err < 0) {
4469  mov_read_close(s);
4470  return err;
4471  }
4472  break;
4473  case AVMEDIA_TYPE_VIDEO:
4474  if (sc->display_matrix) {
4475  AVPacketSideData *sd, *tmp;
4476 
4477  tmp = av_realloc_array(st->side_data,
4478  st->nb_side_data + 1, sizeof(*tmp));
4479  if (!tmp)
4480  return AVERROR(ENOMEM);
4481 
4482  st->side_data = tmp;
4483  st->nb_side_data++;
4484 
4485  sd = &st->side_data[st->nb_side_data - 1];
4486  sd->type = AV_PKT_DATA_DISPLAYMATRIX;
4487  sd->size = sizeof(int32_t) * 9;
4488  sd->data = (uint8_t*)sc->display_matrix;
4489  sc->display_matrix = NULL;
4490  }
4491  break;
4492  }
4493  }
4494  ff_configure_buffers_for_index(s, AV_TIME_BASE);
4495 
4496  return 0;
4497 }
4498 
4499 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
4500 {
4501  AVIndexEntry *sample = NULL;
4502  int64_t best_dts = INT64_MAX;
4503  int i;
4504  for (i = 0; i < s->nb_streams; i++) {
4505  AVStream *avst = s->streams[i];
4506  MOVStreamContext *msc = avst->priv_data;
4507  if (msc->pb && msc->current_sample < avst->nb_index_entries) {
4508  AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
4509  int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
4510  av_log(s, AV_LOG_TRACE, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
4511  if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
4512  (s->pb->seekable &&
4513  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
4514  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
4515  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
4516  sample = current_sample;
4517  best_dts = dts;
4518  *st = avst;
4519  }
4520  }
4521  }
4522  return sample;
4523 }
4524 
4525 static int should_retry(AVIOContext *pb, int error_code) {
4526  if (error_code == AVERROR_EOF || avio_feof(pb))
4527  return 0;
4528 
4529  return 1;
4530 }
4531 
4532 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
4533 {
4534  MOVContext *mov = s->priv_data;
4535  MOVStreamContext *sc;
4536  AVIndexEntry *sample;
4537  AVStream *st = NULL;
4538  int ret;
4539  mov->fc = s;
4540  retry:
4541  sample = mov_find_next_sample(s, &st);
4542  if (!sample) {
4543  mov->found_mdat = 0;
4544  if (!mov->next_root_atom)
4545  return AVERROR_EOF;
4546  if (avio_seek(s->pb, mov->next_root_atom, SEEK_SET) != mov->next_root_atom) {
4547  av_log(mov->fc, AV_LOG_ERROR, "next root atom offset 0x%"PRIx64": partial file\n", mov->next_root_atom);
4548  return AVERROR_INVALIDDATA;
4549  }
4550  mov->next_root_atom = 0;
4551  if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
4552  avio_feof(s->pb))
4553  return AVERROR_EOF;
4554  av_log(s, AV_LOG_TRACE, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
4555  goto retry;
4556  }
4557  sc = st->priv_data;
4558  /* must be done just before reading, to avoid infinite loop on sample */
4559  sc->current_sample++;
4560 
4561  if (mov->next_root_atom) {
4562  sample->pos = FFMIN(sample->pos, mov->next_root_atom);
4563  sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
4564  }
4565 
4566  if (st->discard != AVDISCARD_ALL) {
4567  int64_t ret64 = avio_seek(sc->pb, sample->pos, SEEK_SET);
4