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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/avassert.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/dict.h"
40 #include "libavutil/display.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/aes.h"
43 #include "libavutil/aes_ctr.h"
44 #include "libavutil/pixdesc.h"
45 #include "libavutil/sha.h"
46 #include "libavutil/spherical.h"
47 #include "libavutil/stereo3d.h"
48 #include "libavutil/timecode.h"
49 #include "libavcodec/ac3tab.h"
50 #include "libavcodec/flac.h"
51 #include "libavcodec/mpegaudiodecheader.h"
52 #include "avformat.h"
53 #include "internal.h"
54 #include "avio_internal.h"
55 #include "riff.h"
56 #include "isom.h"
57 #include "libavcodec/get_bits.h"
58 #include "id3v1.h"
59 #include "mov_chan.h"
60 #include "replaygain.h"
61 
62 #if CONFIG_ZLIB
63 #include <zlib.h>
64 #endif
65 
66 #include "qtpalette.h"
67 
68 /* those functions parse an atom */
69 /* links atom IDs to parse functions */
70 typedef struct MOVParseTableEntry {
71  uint32_t type;
72  int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
73 } MOVParseTableEntry;
74 
75 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
76 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
77 
78 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
79  unsigned len, const char *key)
80 {
81  char buf[16];
82 
83  short current, total = 0;
84  avio_rb16(pb); // unknown
85  current = avio_rb16(pb);
86  if (len >= 6)
87  total = avio_rb16(pb);
88  if (!total)
89  snprintf(buf, sizeof(buf), "%d", current);
90  else
91  snprintf(buf, sizeof(buf), "%d/%d", current, total);
92  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
93  av_dict_set(&c->fc->metadata, key, buf, 0);
94 
95  return 0;
96 }
97 
98 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
99  unsigned len, const char *key)
100 {
101  /* bypass padding bytes */
102  avio_r8(pb);
103  avio_r8(pb);
104  avio_r8(pb);
105 
106  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
107  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
108 
109  return 0;
110 }
111 
112 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
113  unsigned len, const char *key)
114 {
115  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
116  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
117 
118  return 0;
119 }
120 
121 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
122  unsigned len, const char *key)
123 {
124  short genre;
125 
126  avio_r8(pb); // unknown
127 
128  genre = avio_r8(pb);
129  if (genre < 1 || genre > ID3v1_GENRE_MAX)
130  return 0;
131  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
132  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
133 
134  return 0;
135 }
136 
137 static const uint32_t mac_to_unicode[128] = {
138  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
139  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
140  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
141  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
142  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
143  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
144  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
145  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
146  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
147  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
148  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
149  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
150  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
151  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
152  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
153  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
154 };
155 
156 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
157  char *dst, int dstlen)
158 {
159  char *p = dst;
160  char *end = dst+dstlen-1;
161  int i;
162 
163  for (i = 0; i < len; i++) {
164  uint8_t t, c = avio_r8(pb);
165  if (c < 0x80 && p < end)
166  *p++ = c;
167  else if (p < end)
168  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
169  }
170  *p = 0;
171  return p - dst;
172 }
173 
174 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
175 {
176  AVPacket pkt;
177  AVStream *st;
178  MOVStreamContext *sc;
179  enum AVCodecID id;
180  int ret;
181 
182  switch (type) {
183  case 0xd: id = AV_CODEC_ID_MJPEG; break;
184  case 0xe: id = AV_CODEC_ID_PNG; break;
185  case 0x1b: id = AV_CODEC_ID_BMP; break;
186  default:
187  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
188  avio_skip(pb, len);
189  return 0;
190  }
191 
192  st = avformat_new_stream(c->fc, NULL);
193  if (!st)
194  return AVERROR(ENOMEM);
195  sc = av_mallocz(sizeof(*sc));
196  if (!sc)
197  return AVERROR(ENOMEM);
198  st->priv_data = sc;
199 
200  ret = av_get_packet(pb, &pkt, len);
201  if (ret < 0)
202  return ret;
203 
204  if (pkt.size >= 8 && id != AV_CODEC_ID_BMP) {
205  if (AV_RB64(pkt.data) == 0x89504e470d0a1a0a) {
206  id = AV_CODEC_ID_PNG;
207  } else {
208  id = AV_CODEC_ID_MJPEG;
209  }
210  }
211 
212  st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
213 
214  st->attached_pic = pkt;
215  st->attached_pic.stream_index = st->index;
216  st->attached_pic.flags |= AV_PKT_FLAG_KEY;
217 
218  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
219  st->codecpar->codec_id = id;
220 
221  return 0;
222 }
223 
224 // 3GPP TS 26.244
225 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
226 {
227  char language[4] = { 0 };
228  char buf[200], place[100];
229  uint16_t langcode = 0;
230  double longitude, latitude, altitude;
231  const char *key = "location";
232 
233  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
234  av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
235  return AVERROR_INVALIDDATA;
236  }
237 
238  avio_skip(pb, 4); // version+flags
239  langcode = avio_rb16(pb);
240  ff_mov_lang_to_iso639(langcode, language);
241  len -= 6;
242 
243  len -= avio_get_str(pb, len, place, sizeof(place));
244  if (len < 1) {
245  av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
246  return AVERROR_INVALIDDATA;
247  }
248  avio_skip(pb, 1); // role
249  len -= 1;
250 
251  if (len < 12) {
252  av_log(c->fc, AV_LOG_ERROR,
253  "loci too short (%u bytes left, need at least %d)\n", len, 12);
254  return AVERROR_INVALIDDATA;
255  }
256  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
257  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
258  altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
259 
260  // Try to output in the same format as the ?xyz field
261  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
262  if (altitude)
263  av_strlcatf(buf, sizeof(buf), "%+f", altitude);
264  av_strlcatf(buf, sizeof(buf), "/%s", place);
265 
266  if (*language && strcmp(language, "und")) {
267  char key2[16];
268  snprintf(key2, sizeof(key2), "%s-%s", key, language);
269  av_dict_set(&c->fc->metadata, key2, buf, 0);
270  }
271  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
272  return av_dict_set(&c->fc->metadata, key, buf, 0);
273 }
274 
275 static int mov_metadata_hmmt(MOVContext *c, AVIOContext *pb, unsigned len)
276 {
277  int i, n_hmmt;
278 
279  if (len < 2)
280  return 0;
281  if (c->ignore_chapters)
282  return 0;
283 
284  n_hmmt = avio_rb32(pb);
285  for (i = 0; i < n_hmmt && !pb->eof_reached; i++) {
286  int moment_time = avio_rb32(pb);
287  avpriv_new_chapter(c->fc, i, av_make_q(1, 1000), moment_time, AV_NOPTS_VALUE, NULL);
288  }
289  return 0;
290 }
291 
292 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
293 {
294  char tmp_key[5];
295  char key2[32], language[4] = {0};
296  char *str = NULL;
297  const char *key = NULL;
298  uint16_t langcode = 0;
299  uint32_t data_type = 0, str_size, str_size_alloc;
300  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
301  int raw = 0;
302  int num = 0;
303 
304  switch (atom.type) {
305  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
306  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
307  case MKTAG( 'X','M','P','_'):
308  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
309  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
310  case MKTAG( 'a','k','I','D'): key = "account_type";
311  parse = mov_metadata_int8_no_padding; break;
312  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
313  case MKTAG( 'c','a','t','g'): key = "category"; break;
314  case MKTAG( 'c','p','i','l'): key = "compilation";
315  parse = mov_metadata_int8_no_padding; break;
316  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
317  case MKTAG( 'd','e','s','c'): key = "description"; break;
318  case MKTAG( 'd','i','s','k'): key = "disc";
319  parse = mov_metadata_track_or_disc_number; break;
320  case MKTAG( 'e','g','i','d'): key = "episode_uid";
321  parse = mov_metadata_int8_no_padding; break;
322  case MKTAG( 'F','I','R','M'): key = "firmware"; raw = 1; break;
323  case MKTAG( 'g','n','r','e'): key = "genre";
324  parse = mov_metadata_gnre; break;
325  case MKTAG( 'h','d','v','d'): key = "hd_video";
326  parse = mov_metadata_int8_no_padding; break;
327  case MKTAG( 'H','M','M','T'):
328  return mov_metadata_hmmt(c, pb, atom.size);
329  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
330  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
331  case MKTAG( 'l','o','c','i'):
332  return mov_metadata_loci(c, pb, atom.size);
333  case MKTAG( 'p','c','s','t'): key = "podcast";
334  parse = mov_metadata_int8_no_padding; break;
335  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
336  parse = mov_metadata_int8_no_padding; break;
337  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
338  case MKTAG( 'r','t','n','g'): key = "rating";
339  parse = mov_metadata_int8_no_padding; break;
340  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
341  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
342  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
343  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
344  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
345  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
346  case MKTAG( 's','t','i','k'): key = "media_type";
347  parse = mov_metadata_int8_no_padding; break;
348  case MKTAG( 't','r','k','n'): key = "track";
349  parse = mov_metadata_track_or_disc_number; break;
350  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
351  case MKTAG( 't','v','e','s'): key = "episode_sort";
352  parse = mov_metadata_int8_bypass_padding; break;
353  case MKTAG( 't','v','n','n'): key = "network"; break;
354  case MKTAG( 't','v','s','h'): key = "show"; break;
355  case MKTAG( 't','v','s','n'): key = "season_number";
356  parse = mov_metadata_int8_bypass_padding; break;
357  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
358  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
359  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
360  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
361  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
362  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
363  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
364  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
365  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
366  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
367  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
368  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
369  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
370  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
371  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
372  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
373  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
374  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
375  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
376  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
377  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
378  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
379  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
380  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
381  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
382  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
383  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
384  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
385  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
386  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
387  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
388  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
389  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
390  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
391  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
392  }
393 retry:
394  if (c->itunes_metadata && atom.size > 8) {
395  int data_size = avio_rb32(pb);
396  int tag = avio_rl32(pb);
397  if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
398  data_type = avio_rb32(pb); // type
399  avio_rb32(pb); // unknown
400  str_size = data_size - 16;
401  atom.size -= 16;
402 
403  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
404  int ret = mov_read_covr(c, pb, data_type, str_size);
405  if (ret < 0) {
406  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
407  }
408  return ret;
409  } else if (!key && c->found_hdlr_mdta && c->meta_keys) {
410  uint32_t index = AV_RB32(&atom.type);
411  if (index < c->meta_keys_count && index > 0) {
412  key = c->meta_keys[index];
413  } else {
414  av_log(c->fc, AV_LOG_WARNING,
415  "The index of 'data' is out of range: %"PRId32" < 1 or >= %d.\n",
416  index, c->meta_keys_count);
417  }
418  }
419  } else return 0;
420  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
421  str_size = avio_rb16(pb); // string length
422  if (str_size > atom.size) {
423  raw = 1;
424  avio_seek(pb, -2, SEEK_CUR);
425  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
426  goto retry;
427  }
428  langcode = avio_rb16(pb);
429  ff_mov_lang_to_iso639(langcode, language);
430  atom.size -= 4;
431  } else
432  str_size = atom.size;
433 
434  if (c->export_all && !key) {
435  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
436  key = tmp_key;
437  }
438 
439  if (!key)
440  return 0;
441  if (atom.size < 0 || str_size >= INT_MAX/2)
442  return AVERROR_INVALIDDATA;
443 
444  // Allocates enough space if data_type is a int32 or float32 number, otherwise
445  // worst-case requirement for output string in case of utf8 coded input
446  num = (data_type >= 21 && data_type <= 23);
447  str_size_alloc = (num ? 512 : (raw ? str_size : str_size * 2)) + 1;
448  str = av_mallocz(str_size_alloc);
449  if (!str)
450  return AVERROR(ENOMEM);
451 
452  if (parse)
453  parse(c, pb, str_size, key);
454  else {
455  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
456  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
457  } else if (data_type == 21) { // BE signed integer, variable size
458  int val = 0;
459  if (str_size == 1)
460  val = (int8_t)avio_r8(pb);
461  else if (str_size == 2)
462  val = (int16_t)avio_rb16(pb);
463  else if (str_size == 3)
464  val = ((int32_t)(avio_rb24(pb)<<8))>>8;
465  else if (str_size == 4)
466  val = (int32_t)avio_rb32(pb);
467  if (snprintf(str, str_size_alloc, "%d", val) >= str_size_alloc) {
468  av_log(c->fc, AV_LOG_ERROR,
469  "Failed to store the number (%d) in string.\n", val);
470  av_free(str);
471  return AVERROR_INVALIDDATA;
472  }
473  } else if (data_type == 22) { // BE unsigned integer, variable size
474  unsigned int val = 0;
475  if (str_size == 1)
476  val = avio_r8(pb);
477  else if (str_size == 2)
478  val = avio_rb16(pb);
479  else if (str_size == 3)
480  val = avio_rb24(pb);
481  else if (str_size == 4)
482  val = avio_rb32(pb);
483  if (snprintf(str, str_size_alloc, "%u", val) >= str_size_alloc) {
484  av_log(c->fc, AV_LOG_ERROR,
485  "Failed to store the number (%u) in string.\n", val);
486  av_free(str);
487  return AVERROR_INVALIDDATA;
488  }
489  } else if (data_type == 23 && str_size >= 4) { // BE float32
490  float val = av_int2float(avio_rb32(pb));
491  if (snprintf(str, str_size_alloc, "%f", val) >= str_size_alloc) {
492  av_log(c->fc, AV_LOG_ERROR,
493  "Failed to store the float32 number (%f) in string.\n", val);
494  av_free(str);
495  return AVERROR_INVALIDDATA;
496  }
497  } else {
498  int ret = ffio_read_size(pb, str, str_size);
499  if (ret < 0) {
500  av_free(str);
501  return ret;
502  }
503  str[str_size] = 0;
504  }
505  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
506  av_dict_set(&c->fc->metadata, key, str, 0);
507  if (*language && strcmp(language, "und")) {
508  snprintf(key2, sizeof(key2), "%s-%s", key, language);
509  av_dict_set(&c->fc->metadata, key2, str, 0);
510  }
511  if (!strcmp(key, "encoder")) {
512  int major, minor, micro;
513  if (sscanf(str, "HandBrake %d.%d.%d", &major, &minor, &micro) == 3) {
514  c->handbrake_version = 1000000*major + 1000*minor + micro;
515  }
516  }
517  }
518 
519  av_freep(&str);
520  return 0;
521 }
522 
523 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
524 {
525  int64_t start;
526  int i, nb_chapters, str_len, version;
527  char str[256+1];
528  int ret;
529 
530  if (c->ignore_chapters)
531  return 0;
532 
533  if ((atom.size -= 5) < 0)
534  return 0;
535 
536  version = avio_r8(pb);
537  avio_rb24(pb);
538  if (version)
539  avio_rb32(pb); // ???
540  nb_chapters = avio_r8(pb);
541 
542  for (i = 0; i < nb_chapters; i++) {
543  if (atom.size < 9)
544  return 0;
545 
546  start = avio_rb64(pb);
547  str_len = avio_r8(pb);
548 
549  if ((atom.size -= 9+str_len) < 0)
550  return 0;
551 
552  ret = ffio_read_size(pb, str, str_len);
553  if (ret < 0)
554  return ret;
555  str[str_len] = 0;
556  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
557  }
558  return 0;
559 }
560 
561 #define MIN_DATA_ENTRY_BOX_SIZE 12
562 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
563 {
564  AVStream *st;
565  MOVStreamContext *sc;
566  int entries, i, j;
567 
568  if (c->fc->nb_streams < 1)
569  return 0;
570  st = c->fc->streams[c->fc->nb_streams-1];
571  sc = st->priv_data;
572 
573  avio_rb32(pb); // version + flags
574  entries = avio_rb32(pb);
575  if (!entries ||
576  entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
577  entries >= UINT_MAX / sizeof(*sc->drefs))
578  return AVERROR_INVALIDDATA;
579  sc->drefs_count = 0;
580  av_free(sc->drefs);
581  sc->drefs_count = 0;
582  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
583  if (!sc->drefs)
584  return AVERROR(ENOMEM);
585  sc->drefs_count = entries;
586 
587  for (i = 0; i < entries; i++) {
588  MOVDref *dref = &sc->drefs[i];
589  uint32_t size = avio_rb32(pb);
590  int64_t next = avio_tell(pb) + size - 4;
591 
592  if (size < 12)
593  return AVERROR_INVALIDDATA;
594 
595  dref->type = avio_rl32(pb);
596  avio_rb32(pb); // version + flags
597 
598  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
599  /* macintosh alias record */
600  uint16_t volume_len, len;
601  int16_t type;
602  int ret;
603 
604  avio_skip(pb, 10);
605 
606  volume_len = avio_r8(pb);
607  volume_len = FFMIN(volume_len, 27);
608  ret = ffio_read_size(pb, dref->volume, 27);
609  if (ret < 0)
610  return ret;
611  dref->volume[volume_len] = 0;
612  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
613 
614  avio_skip(pb, 12);
615 
616  len = avio_r8(pb);
617  len = FFMIN(len, 63);
618  ret = ffio_read_size(pb, dref->filename, 63);
619  if (ret < 0)
620  return ret;
621  dref->filename[len] = 0;
622  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
623 
624  avio_skip(pb, 16);
625 
626  /* read next level up_from_alias/down_to_target */
627  dref->nlvl_from = avio_rb16(pb);
628  dref->nlvl_to = avio_rb16(pb);
629  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
630  dref->nlvl_from, dref->nlvl_to);
631 
632  avio_skip(pb, 16);
633 
634  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
635  if(avio_feof(pb))
636  return AVERROR_EOF;
637  type = avio_rb16(pb);
638  len = avio_rb16(pb);
639  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
640  if (len&1)
641  len += 1;
642  if (type == 2) { // absolute path
643  av_free(dref->path);
644  dref->path = av_mallocz(len+1);
645  if (!dref->path)
646  return AVERROR(ENOMEM);
647 
648  ret = ffio_read_size(pb, dref->path, len);
649  if (ret < 0) {
650  av_freep(&dref->path);
651  return ret;
652  }
653  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
654  len -= volume_len;
655  memmove(dref->path, dref->path+volume_len, len);
656  dref->path[len] = 0;
657  }
658  // trim string of any ending zeros
659  for (j = len - 1; j >= 0; j--) {
660  if (dref->path[j] == 0)
661  len--;
662  else
663  break;
664  }
665  for (j = 0; j < len; j++)
666  if (dref->path[j] == ':' || dref->path[j] == 0)
667  dref->path[j] = '/';
668  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
669  } else if (type == 0) { // directory name
670  av_free(dref->dir);
671  dref->dir = av_malloc(len+1);
672  if (!dref->dir)
673  return AVERROR(ENOMEM);
674 
675  ret = ffio_read_size(pb, dref->dir, len);
676  if (ret < 0) {
677  av_freep(&dref->dir);
678  return ret;
679  }
680  dref->dir[len] = 0;
681  for (j = 0; j < len; j++)
682  if (dref->dir[j] == ':')
683  dref->dir[j] = '/';
684  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
685  } else
686  avio_skip(pb, len);
687  }
688  } else {
689  av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x%08"PRIx32" size %"PRIu32"\n",
690  dref->type, size);
691  entries--;
692  i--;
693  }
694  avio_seek(pb, next, SEEK_SET);
695  }
696  return 0;
697 }
698 
699 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
700 {
701  AVStream *st;
702  uint32_t type;
703  uint32_t ctype;
704  int64_t title_size;
705  char *title_str;
706  int ret;
707 
708  avio_r8(pb); /* version */
709  avio_rb24(pb); /* flags */
710 
711  /* component type */
712  ctype = avio_rl32(pb);
713  type = avio_rl32(pb); /* component subtype */
714 
715  av_log(c->fc, AV_LOG_TRACE, "ctype=%s\n", av_fourcc2str(ctype));
716  av_log(c->fc, AV_LOG_TRACE, "stype=%s\n", av_fourcc2str(type));
717 
718  if (c->trak_index < 0) { // meta not inside a trak
719  if (type == MKTAG('m','d','t','a')) {
720  c->found_hdlr_mdta = 1;
721  }
722  return 0;
723  }
724 
725  st = c->fc->streams[c->fc->nb_streams-1];
726 
727  if (type == MKTAG('v','i','d','e'))
728  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
729  else if (type == MKTAG('s','o','u','n'))
730  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
731  else if (type == MKTAG('m','1','a',' '))
732  st->codecpar->codec_id = AV_CODEC_ID_MP2;
733  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
734  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
735 
736  avio_rb32(pb); /* component manufacture */
737  avio_rb32(pb); /* component flags */
738  avio_rb32(pb); /* component flags mask */
739 
740  title_size = atom.size - 24;
741  if (title_size > 0) {
742  if (title_size > FFMIN(INT_MAX, SIZE_MAX-1))
743  return AVERROR_INVALIDDATA;
744  title_str = av_malloc(title_size + 1); /* Add null terminator */
745  if (!title_str)
746  return AVERROR(ENOMEM);
747 
748  ret = ffio_read_size(pb, title_str, title_size);
749  if (ret < 0) {
750  av_freep(&title_str);
751  return ret;
752  }
753  title_str[title_size] = 0;
754  if (title_str[0]) {
755  int off = (!c->isom && title_str[0] == title_size - 1);
756  av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
757  }
758  av_freep(&title_str);
759  }
760 
761  return 0;
762 }
763 
764 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
765 {
766  AVStream *st;
767  int tag;
768 
769  if (fc->nb_streams < 1)
770  return 0;
771  st = fc->streams[fc->nb_streams-1];
772 
773  avio_rb32(pb); /* version + flags */
774  ff_mp4_read_descr(fc, pb, &tag);
775  if (tag == MP4ESDescrTag) {
776  ff_mp4_parse_es_descr(pb, NULL);
777  } else
778  avio_rb16(pb); /* ID */
779 
780  ff_mp4_read_descr(fc, pb, &tag);
781  if (tag == MP4DecConfigDescrTag)
782  ff_mp4_read_dec_config_descr(fc, st, pb);
783  return 0;
784 }
785 
786 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
787 {
788  return ff_mov_read_esds(c->fc, pb);
789 }
790 
791 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
792 {
793  AVStream *st;
794  enum AVAudioServiceType *ast;
795  int ac3info, acmod, lfeon, bsmod;
796 
797  if (c->fc->nb_streams < 1)
798  return 0;
799  st = c->fc->streams[c->fc->nb_streams-1];
800 
801  ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
802  sizeof(*ast));
803  if (!ast)
804  return AVERROR(ENOMEM);
805 
806  ac3info = avio_rb24(pb);
807  bsmod = (ac3info >> 14) & 0x7;
808  acmod = (ac3info >> 11) & 0x7;
809  lfeon = (ac3info >> 10) & 0x1;
810  st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
811  st->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
812  if (lfeon)
813  st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
814  *ast = bsmod;
815  if (st->codecpar->channels > 1 && bsmod == 0x7)
816  *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
817 
818 #if FF_API_LAVF_AVCTX
819  FF_DISABLE_DEPRECATION_WARNINGS
820  st->codec->audio_service_type = *ast;
821  FF_ENABLE_DEPRECATION_WARNINGS
822 #endif
823 
824  return 0;
825 }
826 
827 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
828 {
829  AVStream *st;
830  enum AVAudioServiceType *ast;
831  int eac3info, acmod, lfeon, bsmod;
832 
833  if (c->fc->nb_streams < 1)
834  return 0;
835  st = c->fc->streams[c->fc->nb_streams-1];
836 
837  ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
838  sizeof(*ast));
839  if (!ast)
840  return AVERROR(ENOMEM);
841 
842  /* No need to parse fields for additional independent substreams and its
843  * associated dependent substreams since libavcodec's E-AC-3 decoder
844  * does not support them yet. */
845  avio_rb16(pb); /* data_rate and num_ind_sub */
846  eac3info = avio_rb24(pb);
847  bsmod = (eac3info >> 12) & 0x1f;
848  acmod = (eac3info >> 9) & 0x7;
849  lfeon = (eac3info >> 8) & 0x1;
850  st->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
851  if (lfeon)
852  st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
853  st->codecpar->channels = av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
854  *ast = bsmod;
855  if (st->codecpar->channels > 1 && bsmod == 0x7)
856  *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
857 
858 #if FF_API_LAVF_AVCTX
859  FF_DISABLE_DEPRECATION_WARNINGS
860  st->codec->audio_service_type = *ast;
861  FF_ENABLE_DEPRECATION_WARNINGS
862 #endif
863 
864  return 0;
865 }
866 
867 static int mov_read_ddts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
868 {
869  const uint32_t ddts_size = 20;
870  AVStream *st = NULL;
871  uint8_t *buf = NULL;
872  uint32_t frame_duration_code = 0;
873  uint32_t channel_layout_code = 0;
874  GetBitContext gb;
875 
876  buf = av_malloc(ddts_size + AV_INPUT_BUFFER_PADDING_SIZE);
877  if (!buf) {
878  return AVERROR(ENOMEM);
879  }
880  if (avio_read(pb, buf, ddts_size) < ddts_size) {
881  av_free(buf);
882  return AVERROR_INVALIDDATA;
883  }
884 
885  init_get_bits(&gb, buf, 8*ddts_size);
886 
887  if (c->fc->nb_streams < 1) {
888  return 0;
889  }
890  st = c->fc->streams[c->fc->nb_streams-1];
891 
892  st->codecpar->sample_rate = get_bits_long(&gb, 32);
893  if (st->codecpar->sample_rate <= 0) {
894  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
895  return AVERROR_INVALIDDATA;
896  }
897  skip_bits_long(&gb, 32); /* max bitrate */
898  st->codecpar->bit_rate = get_bits_long(&gb, 32);
899  st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
900  frame_duration_code = get_bits(&gb, 2);
901  skip_bits(&gb, 30); /* various fields */
902  channel_layout_code = get_bits(&gb, 16);
903 
904  st->codecpar->frame_size =
905  (frame_duration_code == 0) ? 512 :
906  (frame_duration_code == 1) ? 1024 :
907  (frame_duration_code == 2) ? 2048 :
908  (frame_duration_code == 3) ? 4096 : 0;
909 
910  if (channel_layout_code > 0xff) {
911  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
912  }
913  st->codecpar->channel_layout =
914  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
915  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
916  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
917  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
918  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
919  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
920 
921  st->codecpar->channels = av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
922 
923  return 0;
924 }
925 
926 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
927 {
928  AVStream *st;
929 
930  if (c->fc->nb_streams < 1)
931  return 0;
932  st = c->fc->streams[c->fc->nb_streams-1];
933 
934  if (atom.size < 16)
935  return 0;
936 
937  /* skip version and flags */
938  avio_skip(pb, 4);
939 
940  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
941 
942  return 0;
943 }
944 
945 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
946 {
947  AVStream *st;
948  int ret;
949 
950  if (c->fc->nb_streams < 1)
951  return 0;
952  st = c->fc->streams[c->fc->nb_streams-1];
953 
954  if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
955  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
956 
957  return ret;
958 }
959 
960 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
961 {
962  const int num = avio_rb32(pb);
963  const int den = avio_rb32(pb);
964  AVStream *st;
965 
966  if (c->fc->nb_streams < 1)
967  return 0;
968  st = c->fc->streams[c->fc->nb_streams-1];
969 
970  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
971  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
972  av_log(c->fc, AV_LOG_WARNING,
973  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
974  st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
975  num, den);
976  } else if (den != 0) {
977  av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den,
978  num, den, 32767);
979  }
980  return 0;
981 }
982 
983 /* this atom contains actual media data */
984 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
985 {
986  if (atom.size == 0) /* wrong one (MP4) */
987  return 0;
988  c->found_mdat=1;
989  return 0; /* now go for moov */
990 }
991 
992 #define DRM_BLOB_SIZE 56
993 
994 static int mov_read_adrm(MOVContext *c, AVIOContext *pb, MOVAtom atom)
995 {
996  uint8_t intermediate_key[20];
997  uint8_t intermediate_iv[20];
998  uint8_t input[64];
999  uint8_t output[64];
1000  uint8_t file_checksum[20];
1001  uint8_t calculated_checksum[20];
1002  struct AVSHA *sha;
1003  int i;
1004  int ret = 0;
1005  uint8_t *activation_bytes = c->activation_bytes;
1006  uint8_t *fixed_key = c->audible_fixed_key;
1007 
1008  c->aax_mode = 1;
1009 
1010  sha = av_sha_alloc();
1011  if (!sha)
1012  return AVERROR(ENOMEM);
1013  c->aes_decrypt = av_aes_alloc();
1014  if (!c->aes_decrypt) {
1015  ret = AVERROR(ENOMEM);
1016  goto fail;
1017  }
1018 
1019  /* drm blob processing */
1020  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
1021  avio_read(pb, input, DRM_BLOB_SIZE);
1022  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
1023  avio_read(pb, file_checksum, 20);
1024 
1025  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
1026  for (i = 0; i < 20; i++)
1027  av_log(c->fc, AV_LOG_INFO, "%02x", file_checksum[i]);
1028  av_log(c->fc, AV_LOG_INFO, "\n");
1029 
1030  /* verify activation data */
1031  if (!activation_bytes) {
1032  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
1033  ret = 0; /* allow ffprobe to continue working on .aax files */
1034  goto fail;
1035  }
1036  if (c->activation_bytes_size != 4) {
1037  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
1038  ret = AVERROR(EINVAL);
1039  goto fail;
1040  }
1041 
1042  /* verify fixed key */
1043  if (c->audible_fixed_key_size != 16) {
1044  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
1045  ret = AVERROR(EINVAL);
1046  goto fail;
1047  }
1048 
1049  /* AAX (and AAX+) key derivation */
1050  av_sha_init(sha, 160);
1051  av_sha_update(sha, fixed_key, 16);
1052  av_sha_update(sha, activation_bytes, 4);
1053  av_sha_final(sha, intermediate_key);
1054  av_sha_init(sha, 160);
1055  av_sha_update(sha, fixed_key, 16);
1056  av_sha_update(sha, intermediate_key, 20);
1057  av_sha_update(sha, activation_bytes, 4);
1058  av_sha_final(sha, intermediate_iv);
1059  av_sha_init(sha, 160);
1060  av_sha_update(sha, intermediate_key, 16);
1061  av_sha_update(sha, intermediate_iv, 16);
1062  av_sha_final(sha, calculated_checksum);
1063  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1064  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1065  ret = AVERROR_INVALIDDATA;
1066  goto fail;
1067  }
1068  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1069  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1070  for (i = 0; i < 4; i++) {
1071  // file data (in output) is stored in big-endian mode
1072  if (activation_bytes[i] != output[3 - i]) { // critical error
1073  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1074  ret = AVERROR_INVALIDDATA;
1075  goto fail;
1076  }
1077  }
1078  memcpy(c->file_key, output + 8, 16);
1079  memcpy(input, output + 26, 16);
1080  av_sha_init(sha, 160);
1081  av_sha_update(sha, input, 16);
1082  av_sha_update(sha, c->file_key, 16);
1083  av_sha_update(sha, fixed_key, 16);
1084  av_sha_final(sha, c->file_iv);
1085 
1086 fail:
1087  av_free(sha);
1088 
1089  return ret;
1090 }
1091 
1092 // Audible AAX (and AAX+) bytestream decryption
1093 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1094 {
1095  int blocks = 0;
1096  unsigned char iv[16];
1097 
1098  memcpy(iv, c->file_iv, 16); // iv is overwritten
1099  blocks = size >> 4; // trailing bytes are not encrypted!
1100  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1101  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1102 
1103  return 0;
1104 }
1105 
1106 /* read major brand, minor version and compatible brands and store them as metadata */
1107 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1108 {
1109  uint32_t minor_ver;
1110  int comp_brand_size;
1111  char* comp_brands_str;
1112  uint8_t type[5] = {0};
1113  int ret = ffio_read_size(pb, type, 4);
1114  if (ret < 0)
1115  return ret;
1116 
1117  if (strcmp(type, "qt "))
1118  c->isom = 1;
1119  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1120  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1121  minor_ver = avio_rb32(pb); /* minor version */
1122  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1123 
1124  comp_brand_size = atom.size - 8;
1125  if (comp_brand_size < 0)
1126  return AVERROR_INVALIDDATA;
1127  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1128  if (!comp_brands_str)
1129  return AVERROR(ENOMEM);
1130 
1131  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1132  if (ret < 0) {
1133  av_freep(&comp_brands_str);
1134  return ret;
1135  }
1136  comp_brands_str[comp_brand_size] = 0;
1137  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1138  av_freep(&comp_brands_str);
1139 
1140  return 0;
1141 }
1142 
1143 /* this atom should contain all header atoms */
1144 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1145 {
1146  int ret;
1147 
1148  if (c->found_moov) {
1149  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1150  avio_skip(pb, atom.size);
1151  return 0;
1152  }
1153 
1154  if ((ret = mov_read_default(c, pb, atom)) < 0)
1155  return ret;
1156  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1157  /* so we don't parse the whole file if over a network */
1158  c->found_moov=1;
1159  return 0; /* now go for mdat */
1160 }
1161 
1162 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1163 {
1164  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1165  c->has_looked_for_mfra = 1;
1166  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1167  int ret;
1168  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1169  "for a mfra\n");
1170  if ((ret = mov_read_mfra(c, pb)) < 0) {
1171  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1172  "read the mfra (may be a live ismv)\n");
1173  }
1174  } else {
1175  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1176  "seekable, can not look for mfra\n");
1177  }
1178  }
1179  c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
1180  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1181  return mov_read_default(c, pb, atom);
1182 }
1183 
1184 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1185 {
1186  if (time) {
1187  if(time >= 2082844800)
1188  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1189 
1190  if ((int64_t)(time * 1000000ULL) / 1000000 != time) {
1191  av_log(NULL, AV_LOG_DEBUG, "creation_time is not representable\n");
1192  return;
1193  }
1194 
1195  avpriv_dict_set_timestamp(metadata, "creation_time", time * 1000000);
1196  }
1197 }
1198 
1199 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1200 {
1201  AVStream *st;
1202  MOVStreamContext *sc;
1203  int version;
1204  char language[4] = {0};
1205  unsigned lang;
1206  int64_t creation_time;
1207 
1208  if (c->fc->nb_streams < 1)
1209  return 0;
1210  st = c->fc->streams[c->fc->nb_streams-1];
1211  sc = st->priv_data;
1212 
1213  if (sc->time_scale) {
1214  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1215  return AVERROR_INVALIDDATA;
1216  }
1217 
1218  version = avio_r8(pb);
1219  if (version > 1) {
1220  avpriv_request_sample(c->fc, "Version %d", version);
1221  return AVERROR_PATCHWELCOME;
1222  }
1223  avio_rb24(pb); /* flags */
1224  if (version == 1) {
1225  creation_time = avio_rb64(pb);
1226  avio_rb64(pb);
1227  } else {
1228  creation_time = avio_rb32(pb);
1229  avio_rb32(pb); /* modification time */
1230  }
1231  mov_metadata_creation_time(&st->metadata, creation_time);
1232 
1233  sc->time_scale = avio_rb32(pb);
1234  if (sc->time_scale <= 0) {
1235  av_log(c->fc, AV_LOG_ERROR, "Invalid mdhd time scale %d, defaulting to 1\n", sc->time_scale);
1236  sc->time_scale = 1;
1237  }
1238  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1239 
1240  lang = avio_rb16(pb); /* language */
1241  if (ff_mov_lang_to_iso639(lang, language))
1242  av_dict_set(&st->metadata, "language", language, 0);
1243  avio_rb16(pb); /* quality */
1244 
1245  return 0;
1246 }
1247 
1248 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1249 {
1250  int i;
1251  int64_t creation_time;
1252  int version = avio_r8(pb); /* version */
1253  avio_rb24(pb); /* flags */
1254 
1255  if (version == 1) {
1256  creation_time = avio_rb64(pb);
1257  avio_rb64(pb);
1258  } else {
1259  creation_time = avio_rb32(pb);
1260  avio_rb32(pb); /* modification time */
1261  }
1262  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1263  c->time_scale = avio_rb32(pb); /* time scale */
1264  if (c->time_scale <= 0) {
1265  av_log(c->fc, AV_LOG_ERROR, "Invalid mvhd time scale %d, defaulting to 1\n", c->time_scale);
1266  c->time_scale = 1;
1267  }
1268  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1269 
1270  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1271  // set the AVCodecContext duration because the duration of individual tracks
1272  // may be inaccurate
1273  if (c->time_scale > 0 && !c->trex_data)
1274  c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
1275  avio_rb32(pb); /* preferred scale */
1276 
1277  avio_rb16(pb); /* preferred volume */
1278 
1279  avio_skip(pb, 10); /* reserved */
1280 
1281  /* movie display matrix, store it in main context and use it later on */
1282  for (i = 0; i < 3; i++) {
1283  c->movie_display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
1284  c->movie_display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
1285  c->movie_display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
1286  }
1287 
1288  avio_rb32(pb); /* preview time */
1289  avio_rb32(pb); /* preview duration */
1290  avio_rb32(pb); /* poster time */
1291  avio_rb32(pb); /* selection time */
1292  avio_rb32(pb); /* selection duration */
1293  avio_rb32(pb); /* current time */
1294  avio_rb32(pb); /* next track ID */
1295 
1296  return 0;
1297 }
1298 
1299 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1300 {
1301  AVStream *st;
1302  int little_endian;
1303 
1304  if (c->fc->nb_streams < 1)
1305  return 0;
1306  st = c->fc->streams[c->fc->nb_streams-1];
1307 
1308  little_endian = avio_rb16(pb) & 0xFF;
1309  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1310  if (little_endian == 1) {
1311  switch (st->codecpar->codec_id) {
1312  case AV_CODEC_ID_PCM_S24BE:
1313  st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
1314  break;
1315  case AV_CODEC_ID_PCM_S32BE:
1316  st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
1317  break;
1318  case AV_CODEC_ID_PCM_F32BE:
1319  st->codecpar->codec_id = AV_CODEC_ID_PCM_F32LE;
1320  break;
1321  case AV_CODEC_ID_PCM_F64BE:
1322  st->codecpar->codec_id = AV_CODEC_ID_PCM_F64LE;
1323  break;
1324  default:
1325  break;
1326  }
1327  }
1328  return 0;
1329 }
1330 
1331 static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1332 {
1333  AVStream *st;
1334  char color_parameter_type[5] = { 0 };
1335  uint16_t color_primaries, color_trc, color_matrix;
1336  int ret;
1337 
1338  if (c->fc->nb_streams < 1)
1339  return 0;
1340  st = c->fc->streams[c->fc->nb_streams - 1];
1341 
1342  ret = ffio_read_size(pb, color_parameter_type, 4);
1343  if (ret < 0)
1344  return ret;
1345  if (strncmp(color_parameter_type, "nclx", 4) &&
1346  strncmp(color_parameter_type, "nclc", 4)) {
1347  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1348  color_parameter_type);
1349  return 0;
1350  }
1351 
1352  color_primaries = avio_rb16(pb);
1353  color_trc = avio_rb16(pb);
1354  color_matrix = avio_rb16(pb);
1355 
1356  av_log(c->fc, AV_LOG_TRACE,
1357  "%s: pri %d trc %d matrix %d",
1358  color_parameter_type, color_primaries, color_trc, color_matrix);
1359 
1360  if (!strncmp(color_parameter_type, "nclx", 4)) {
1361  uint8_t color_range = avio_r8(pb) >> 7;
1362  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1363  if (color_range)
1364  st->codecpar->color_range = AVCOL_RANGE_JPEG;
1365  else
1366  st->codecpar->color_range = AVCOL_RANGE_MPEG;
1367  }
1368 
1369  if (!av_color_primaries_name(color_primaries))
1370  color_primaries = AVCOL_PRI_UNSPECIFIED;
1371  if (!av_color_transfer_name(color_trc))
1372  color_trc = AVCOL_TRC_UNSPECIFIED;
1373  if (!av_color_space_name(color_matrix))
1374  color_matrix = AVCOL_SPC_UNSPECIFIED;
1375 
1376  st->codecpar->color_primaries = color_primaries;
1377  st->codecpar->color_trc = color_trc;
1378  st->codecpar->color_space = color_matrix;
1379  av_log(c->fc, AV_LOG_TRACE, "\n");
1380 
1381  return 0;
1382 }
1383 
1384 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1385 {
1386  AVStream *st;
1387  unsigned mov_field_order;
1388  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1389 
1390  if (c->fc->nb_streams < 1) // will happen with jp2 files
1391  return 0;
1392  st = c->fc->streams[c->fc->nb_streams-1];
1393  if (atom.size < 2)
1394  return AVERROR_INVALIDDATA;
1395  mov_field_order = avio_rb16(pb);
1396  if ((mov_field_order & 0xFF00) == 0x0100)
1397  decoded_field_order = AV_FIELD_PROGRESSIVE;
1398  else if ((mov_field_order & 0xFF00) == 0x0200) {
1399  switch (mov_field_order & 0xFF) {
1400  case 0x01: decoded_field_order = AV_FIELD_TT;
1401  break;
1402  case 0x06: decoded_field_order = AV_FIELD_BB;
1403  break;
1404  case 0x09: decoded_field_order = AV_FIELD_TB;
1405  break;
1406  case 0x0E: decoded_field_order = AV_FIELD_BT;
1407  break;
1408  }
1409  }
1410  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1411  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1412  }
1413  st->codecpar->field_order = decoded_field_order;
1414 
1415  return 0;
1416 }
1417 
1418 static int mov_realloc_extradata(AVCodecParameters *par, MOVAtom atom)
1419 {
1420  int err = 0;
1421  uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1422  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1423  return AVERROR_INVALIDDATA;
1424  if ((err = av_reallocp(&par->extradata, size)) < 0) {
1425  par->extradata_size = 0;
1426  return err;
1427  }
1428  par->extradata_size = size - AV_INPUT_BUFFER_PADDING_SIZE;
1429  return 0;
1430 }
1431 
1432 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1433 static int64_t mov_read_atom_into_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1434  AVCodecParameters *par, uint8_t *buf)
1435 {
1436  int64_t result = atom.size;
1437  int err;
1438 
1439  AV_WB32(buf , atom.size + 8);
1440  AV_WL32(buf + 4, atom.type);
1441  err = ffio_read_size(pb, buf + 8, atom.size);
1442  if (err < 0) {
1443  par->extradata_size -= atom.size;
1444  return err;
1445  } else if (err < atom.size) {
1446  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1447  par->extradata_size -= atom.size - err;
1448  result = err;
1449  }
1450  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1451  return result;
1452 }
1453 
1454 /* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1455 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1456  enum AVCodecID codec_id)
1457 {
1458  AVStream *st;
1459  uint64_t original_size;
1460  int err;
1461 
1462  if (c->fc->nb_streams < 1) // will happen with jp2 files
1463  return 0;
1464  st = c->fc->streams[c->fc->nb_streams-1];
1465 
1466  if (st->codecpar->codec_id != codec_id)
1467  return 0; /* unexpected codec_id - don't mess with extradata */
1468 
1469  original_size = st->codecpar->extradata_size;
1470  err = mov_realloc_extradata(st->codecpar, atom);
1471  if (err)
1472  return err;
1473 
1474  err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1475  if (err < 0)
1476  return err;
1477  return 0; // Note: this is the original behavior to ignore truncation.
1478 }
1479 
1480 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1481 static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1482 {
1483  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1484 }
1485 
1486 static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1487 {
1488  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1489 }
1490 
1491 static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1492 {
1493  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1494 }
1495 
1496 static int mov_read_dpxe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1497 {
1498  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1499 }
1500 
1501 static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1502 {
1503  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1504  if(ret == 0)
1505  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1506  return ret;
1507 }
1508 
1509 static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1510 {
1511  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1512 
1513  if (!ret && c->fc->nb_streams >= 1) {
1514  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1515  if (par->extradata_size >= 40) {
1516  par->height = AV_RB16(&par->extradata[36]);
1517  par->width = AV_RB16(&par->extradata[38]);
1518  }
1519  }
1520  return ret;
1521 }
1522 
1523 static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1524 {
1525  if (c->fc->nb_streams >= 1) {
1526  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1527  if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1528  par->codec_id == AV_CODEC_ID_H264 &&
1529  atom.size > 11) {
1530  int cid;
1531  avio_skip(pb, 10);
1532  cid = avio_rb16(pb);
1533  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1534  if (cid == 0xd4d || cid == 0xd4e)
1535  par->width = 1440;
1536  return 0;
1537  } else if ((par->codec_tag == MKTAG('A', 'V', 'd', '1') ||
1538  par->codec_tag == MKTAG('A', 'V', 'd', 'n')) &&
1539  atom.size >= 24) {
1540  int num, den;
1541  avio_skip(pb, 12);
1542  num = avio_rb32(pb);
1543  den = avio_rb32(pb);
1544  if (num <= 0 || den <= 0)
1545  return 0;
1546  switch (avio_rb32(pb)) {
1547  case 2:
1548  if (den >= INT_MAX / 2)
1549  return 0;
1550  den *= 2;
1551  case 1:
1552  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1553  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1554  default:
1555  return 0;
1556  }
1557  }
1558  }
1559 
1560  return mov_read_avid(c, pb, atom);
1561 }
1562 
1563 static int mov_read_aclr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1564 {
1565  int ret = 0;
1566  int length = 0;
1567  uint64_t original_size;
1568  if (c->fc->nb_streams >= 1) {
1569  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1570  if (par->codec_id == AV_CODEC_ID_H264)
1571  return 0;
1572  if (atom.size == 16) {
1573  original_size = par->extradata_size;
1574  ret = mov_realloc_extradata(par, atom);
1575  if (!ret) {
1576  length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1577  if (length == atom.size) {
1578  const uint8_t range_value = par->extradata[original_size + 19];
1579  switch (range_value) {
1580  case 1:
1581  par->color_range = AVCOL_RANGE_MPEG;
1582  break;
1583  case 2:
1584  par->color_range = AVCOL_RANGE_JPEG;
1585  break;
1586  default:
1587  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1588  break;
1589  }
1590  ff_dlog(c, "color_range: %d\n", par->color_range);
1591  } else {
1592  /* For some reason the whole atom was not added to the extradata */
1593  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1594  }
1595  } else {
1596  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1597  }
1598  } else {
1599  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1600  }
1601  }
1602 
1603  return ret;
1604 }
1605 
1606 static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1607 {
1608  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1609 }
1610 
1611 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1612 {
1613  AVStream *st;
1614  int ret;
1615 
1616  if (c->fc->nb_streams < 1)
1617  return 0;
1618  st = c->fc->streams[c->fc->nb_streams-1];
1619 
1620  if ((uint64_t)atom.size > (1<<30))
1621  return AVERROR_INVALIDDATA;
1622 
1623  if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1624  st->codecpar->codec_id == AV_CODEC_ID_QDMC ||
1625  st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
1626  // pass all frma atom to codec, needed at least for QDMC and QDM2
1627  av_freep(&st->codecpar->extradata);
1628  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1629  if (ret < 0)
1630  return ret;
1631  } else if (atom.size > 8) { /* to read frma, esds atoms */
1632  if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1633  uint64_t buffer;
1634  ret = ffio_ensure_seekback(pb, 8);
1635  if (ret < 0)
1636  return ret;
1637  buffer = avio_rb64(pb);
1638  atom.size -= 8;
1639  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1640  && buffer >> 32 <= atom.size
1641  && buffer >> 32 >= 8) {
1642  avio_skip(pb, -8);
1643  atom.size += 8;
1644  } else if (!st->codecpar->extradata_size) {
1645 #define ALAC_EXTRADATA_SIZE 36
1646  st->codecpar->extradata = av_mallocz(ALAC_EXTRADATA_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
1647  if (!st->codecpar->extradata)
1648  return AVERROR(ENOMEM);
1649  st->codecpar->extradata_size = ALAC_EXTRADATA_SIZE;
1650  AV_WB32(st->codecpar->extradata , ALAC_EXTRADATA_SIZE);
1651  AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1652  AV_WB64(st->codecpar->extradata + 12, buffer);
1653  avio_read(pb, st->codecpar->extradata + 20, 16);
1654  avio_skip(pb, atom.size - 24);
1655  return 0;
1656  }
1657  }
1658  if ((ret = mov_read_default(c, pb, atom)) < 0)
1659  return ret;
1660  } else
1661  avio_skip(pb, atom.size);
1662  return 0;
1663 }
1664 
1665 /**
1666  * This function reads atom content and puts data in extradata without tag
1667  * nor size unlike mov_read_extradata.
1668  */
1669 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1670 {
1671  AVStream *st;
1672  int ret;
1673 
1674  if (c->fc->nb_streams < 1)
1675  return 0;
1676  st = c->fc->streams[c->fc->nb_streams-1];
1677 
1678  if ((uint64_t)atom.size > (1<<30))
1679  return AVERROR_INVALIDDATA;
1680 
1681  if (atom.size >= 10) {
1682  // Broken files created by legacy versions of libavformat will
1683  // wrap a whole fiel atom inside of a glbl atom.
1684  unsigned size = avio_rb32(pb);
1685  unsigned type = avio_rl32(pb);
1686  avio_seek(pb, -8, SEEK_CUR);
1687  if (type == MKTAG('f','i','e','l') && size == atom.size)
1688  return mov_read_default(c, pb, atom);
1689  }
1690  if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1691  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1692  return 0;
1693  }
1694  av_freep(&st->codecpar->extradata);
1695  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1696  if (ret < 0)
1697  return ret;
1698 
1699  return 0;
1700 }
1701 
1702 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1703 {
1704  AVStream *st;
1705  uint8_t profile_level;
1706  int ret;
1707 
1708  if (c->fc->nb_streams < 1)
1709  return 0;
1710  st = c->fc->streams[c->fc->nb_streams-1];
1711 
1712  if (atom.size >= (1<<28) || atom.size < 7)
1713  return AVERROR_INVALIDDATA;
1714 
1715  profile_level = avio_r8(pb);
1716  if ((profile_level & 0xf0) != 0xc0)
1717  return 0;
1718 
1719  avio_seek(pb, 6, SEEK_CUR);
1720  av_freep(&st->codecpar->extradata);
1721  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1722  if (ret < 0)
1723  return ret;
1724 
1725  return 0;
1726 }
1727 
1728 /**
1729  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1730  * but can have extradata appended at the end after the 40 bytes belonging
1731  * to the struct.
1732  */
1733 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1734 {
1735  AVStream *st;
1736  int ret;
1737 
1738  if (c->fc->nb_streams < 1)
1739  return 0;
1740  if (atom.size <= 40)
1741  return 0;
1742  st = c->fc->streams[c->fc->nb_streams-1];
1743 
1744  if ((uint64_t)atom.size > (1<<30))
1745  return AVERROR_INVALIDDATA;
1746 
1747  avio_skip(pb, 40);
1748  av_freep(&st->codecpar->extradata);
1749  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1750  if (ret < 0)
1751  return ret;
1752 
1753  return 0;
1754 }
1755 
1756 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1757 {
1758  AVStream *st;
1759  MOVStreamContext *sc;
1760  unsigned int i, entries;
1761 
1762  if (c->fc->nb_streams < 1)
1763  return 0;
1764  st = c->fc->streams[c->fc->nb_streams-1];
1765  sc = st->priv_data;
1766 
1767  avio_r8(pb); /* version */
1768  avio_rb24(pb); /* flags */
1769 
1770  entries = avio_rb32(pb);
1771 
1772  if (!entries)
1773  return 0;
1774 
1775  if (sc->chunk_offsets)
1776  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1777  av_free(sc->chunk_offsets);
1778  sc->chunk_count = 0;
1779  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1780  if (!sc->chunk_offsets)
1781  return AVERROR(ENOMEM);
1782  sc->chunk_count = entries;
1783 
1784  if (atom.type == MKTAG('s','t','c','o'))
1785  for (i = 0; i < entries && !pb->eof_reached; i++)
1786  sc->chunk_offsets[i] = avio_rb32(pb);
1787  else if (atom.type == MKTAG('c','o','6','4'))
1788  for (i = 0; i < entries && !pb->eof_reached; i++)
1789  sc->chunk_offsets[i] = avio_rb64(pb);
1790  else
1791  return AVERROR_INVALIDDATA;
1792 
1793  sc->chunk_count = i;
1794 
1795  if (pb->eof_reached)
1796  return AVERROR_EOF;
1797 
1798  return 0;
1799 }
1800 
1801 /**
1802  * Compute codec id for 'lpcm' tag.
1803  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1804  */
1805 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1806 {
1807  /* lpcm flags:
1808  * 0x1 = float
1809  * 0x2 = big-endian
1810  * 0x4 = signed
1811  */
1812  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1813 }
1814 
1815 static int mov_codec_id(AVStream *st, uint32_t format)
1816 {
1817  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1818 
1819  if (id <= 0 &&
1820  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1821  (format & 0xFFFF) == 'T' + ('S' << 8)))
1822  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1823 
1824  if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1825  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1826  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1827  /* skip old ASF MPEG-4 tag */
1828  format && format != MKTAG('m','p','4','s')) {
1829  id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1830  if (id <= 0)
1831  id = ff_codec_get_id(ff_codec_bmp_tags, format);
1832  if (id > 0)
1833  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
1834  else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
1835  (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1836  st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
1837  id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1838  if (id > 0)
1839  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
1840  }
1841  }
1842 
1843  st->codecpar->codec_tag = format;
1844 
1845  return id;
1846 }
1847 
1848 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1849  AVStream *st, MOVStreamContext *sc)
1850 {
1851  uint8_t codec_name[32] = { 0 };
1852  int64_t stsd_start;
1853  unsigned int len;
1854 
1855  /* The first 16 bytes of the video sample description are already
1856  * read in ff_mov_read_stsd_entries() */
1857  stsd_start = avio_tell(pb) - 16;
1858 
1859  avio_rb16(pb); /* version */
1860  avio_rb16(pb); /* revision level */
1861  avio_rb32(pb); /* vendor */
1862  avio_rb32(pb); /* temporal quality */
1863  avio_rb32(pb); /* spatial quality */
1864 
1865  st->codecpar->width = avio_rb16(pb); /* width */
1866  st->codecpar->height = avio_rb16(pb); /* height */
1867 
1868  avio_rb32(pb); /* horiz resolution */
1869  avio_rb32(pb); /* vert resolution */
1870  avio_rb32(pb); /* data size, always 0 */
1871  avio_rb16(pb); /* frames per samples */
1872 
1873  len = avio_r8(pb); /* codec name, pascal string */
1874  if (len > 31)
1875  len = 31;
1876  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1877  if (len < 31)
1878  avio_skip(pb, 31 - len);
1879 
1880  if (codec_name[0])
1881  av_dict_set(&st->metadata, "encoder", codec_name, 0);
1882 
1883  /* codec_tag YV12 triggers an UV swap in rawdec.c */
1884  if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1885  st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1886  st->codecpar->width &= ~1;
1887  st->codecpar->height &= ~1;
1888  }
1889  /* Flash Media Server uses tag H.263 with Sorenson Spark */
1890  if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1891  !memcmp(codec_name, "Sorenson H263", 13))
1892  st->codecpar->codec_id = AV_CODEC_ID_FLV1;
1893 
1894  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1895 
1896  avio_seek(pb, stsd_start, SEEK_SET);
1897 
1898  if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
1899  st->codecpar->bits_per_coded_sample &= 0x1F;
1900  sc->has_palette = 1;
1901  }
1902 }
1903 
1904 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1905  AVStream *st, MOVStreamContext *sc)
1906 {
1907  int bits_per_sample, flags;
1908  uint16_t version = avio_rb16(pb);
1909  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1910 
1911  avio_rb16(pb); /* revision level */
1912  avio_rb32(pb); /* vendor */
1913 
1914  st->codecpar->channels = avio_rb16(pb); /* channel count */
1915  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1916  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1917 
1918  sc->audio_cid = avio_rb16(pb);
1919  avio_rb16(pb); /* packet size = 0 */
1920 
1921  st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1922 
1923  // Read QT version 1 fields. In version 0 these do not exist.
1924  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1925  if (!c->isom ||
1926  (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1927 
1928  if (version == 1) {
1929  sc->samples_per_frame = avio_rb32(pb);
1930  avio_rb32(pb); /* bytes per packet */
1931  sc->bytes_per_frame = avio_rb32(pb);
1932  avio_rb32(pb); /* bytes per sample */
1933  } else if (version == 2) {
1934  avio_rb32(pb); /* sizeof struct only */
1935  st->codecpar->sample_rate = av_int2double(avio_rb64(pb));
1936  st->codecpar->channels = avio_rb32(pb);
1937  avio_rb32(pb); /* always 0x7F000000 */
1938  st->codecpar->bits_per_coded_sample = avio_rb32(pb);
1939 
1940  flags = avio_rb32(pb); /* lpcm format specific flag */
1941  sc->bytes_per_frame = avio_rb32(pb);
1942  sc->samples_per_frame = avio_rb32(pb);
1943  if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1944  st->codecpar->codec_id =
1945  ff_mov_get_lpcm_codec_id(st->codecpar->bits_per_coded_sample,
1946  flags);
1947  }
1948  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1949  /* can't correctly handle variable sized packet as audio unit */
1950  switch (st->codecpar->codec_id) {
1951  case AV_CODEC_ID_MP2:
1952  case AV_CODEC_ID_MP3:
1953  st->need_parsing = AVSTREAM_PARSE_FULL;
1954  break;
1955  }
1956  }
1957  }
1958 
1959  if (sc->format == 0) {
1960  if (st->codecpar->bits_per_coded_sample == 8)
1961  st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1962  else if (st->codecpar->bits_per_coded_sample == 16)
1963  st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1964  }
1965 
1966  switch (st->codecpar->codec_id) {
1967  case AV_CODEC_ID_PCM_S8:
1968  case AV_CODEC_ID_PCM_U8:
1969  if (st->codecpar->bits_per_coded_sample == 16)
1970  st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
1971  break;
1972  case AV_CODEC_ID_PCM_S16LE:
1973  case AV_CODEC_ID_PCM_S16BE:
1974  if (st->codecpar->bits_per_coded_sample == 8)
1975  st->codecpar->codec_id = AV_CODEC_ID_PCM_S8;
1976  else if (st->codecpar->bits_per_coded_sample == 24)
1977  st->codecpar->codec_id =
1978  st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE ?
1979  AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1980  else if (st->codecpar->bits_per_coded_sample == 32)
1981  st->codecpar->codec_id =
1982  st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE ?
1983  AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
1984  break;
1985  /* set values for old format before stsd version 1 appeared */
1986  case AV_CODEC_ID_MACE3:
1987  sc->samples_per_frame = 6;
1988  sc->bytes_per_frame = 2 * st->codecpar->channels;
1989  break;
1990  case AV_CODEC_ID_MACE6:
1991  sc->samples_per_frame = 6;
1992  sc->bytes_per_frame = 1 * st->codecpar->channels;
1993  break;
1994  case AV_CODEC_ID_ADPCM_IMA_QT:
1995  sc->samples_per_frame = 64;
1996  sc->bytes_per_frame = 34 * st->codecpar->channels;
1997  break;
1998  case AV_CODEC_ID_GSM:
1999  sc->samples_per_frame = 160;
2000  sc->bytes_per_frame = 33;
2001  break;
2002  default:
2003  break;
2004  }
2005 
2006  bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2007  if (bits_per_sample) {
2008  st->codecpar->bits_per_coded_sample = bits_per_sample;
2009  sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
2010  }
2011 }
2012 
2013 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
2014  AVStream *st, MOVStreamContext *sc,
2015  int64_t size)
2016 {
2017  // ttxt stsd contains display flags, justification, background
2018  // color, fonts, and default styles, so fake an atom to read it
2019  MOVAtom fake_atom = { .size = size };
2020  // mp4s contains a regular esds atom
2021  if (st->codecpar->codec_tag != AV_RL32("mp4s"))
2022  mov_read_glbl(c, pb, fake_atom);
2023  st->codecpar->width = sc->width;
2024  st->codecpar->height = sc->height;
2025 }
2026 
2027 static uint32_t yuv_to_rgba(uint32_t ycbcr)
2028 {
2029  uint8_t r, g, b;
2030  int y, cb, cr;
2031 
2032  y = (ycbcr >> 16) & 0xFF;
2033  cr = (ycbcr >> 8) & 0xFF;
2034  cb = ycbcr & 0xFF;
2035 
2036  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
2037  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
2038  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
2039 
2040  return (r << 16) | (g << 8) | b;
2041 }
2042 
2043 static int mov_rewrite_dvd_sub_extradata(AVStream *st)
2044 {
2045  char buf[256] = {0};
2046  uint8_t *src = st->codecpar->extradata;
2047  int i;
2048 
2049  if (st->codecpar->extradata_size != 64)
2050  return 0;
2051 
2052  if (st->codecpar->width > 0 && st->codecpar->height > 0)
2053  snprintf(buf, sizeof(buf), "size: %dx%d\n",
2054  st->codecpar->width, st->codecpar->height);
2055  av_strlcat(buf, "palette: ", sizeof(buf));
2056 
2057  for (i = 0; i < 16; i++) {
2058  uint32_t yuv = AV_RB32(src + i * 4);
2059  uint32_t rgba = yuv_to_rgba(yuv);
2060 
2061  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2062  }
2063 
2064  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2065  return 0;
2066 
2067  av_freep(&st->codecpar->extradata);
2068  st->codecpar->extradata_size = 0;
2069  st->codecpar->extradata = av_mallocz(strlen(buf) + AV_INPUT_BUFFER_PADDING_SIZE);
2070  if (!st->codecpar->extradata)
2071  return AVERROR(ENOMEM);
2072  st->codecpar->extradata_size = strlen(buf);
2073  memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2074 
2075  return 0;
2076 }
2077 
2078 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
2079  AVStream *st, MOVStreamContext *sc,
2080  int64_t size)
2081 {
2082  int ret;
2083 
2084  if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2085  if ((int)size != size)
2086  return AVERROR(ENOMEM);
2087 
2088  ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2089  if (ret < 0)
2090  return ret;
2091  if (size > 16) {
2092  MOVStreamContext *tmcd_ctx = st->priv_data;
2093  int val;
2094  val = AV_RB32(st->codecpar->extradata + 4);
2095  tmcd_ctx->tmcd_flags = val;
2096  st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2097  st->avg_frame_rate.den = 1;
2098 #if FF_API_LAVF_AVCTX
2099 FF_DISABLE_DEPRECATION_WARNINGS
2100  st->codec->time_base = av_inv_q(st->avg_frame_rate);
2101 FF_ENABLE_DEPRECATION_WARNINGS
2102 #endif
2103  /* adjust for per frame dur in counter mode */
2104  if (tmcd_ctx->tmcd_flags & 0x0008) {
2105  int timescale = AV_RB32(st->codecpar->extradata + 8);
2106  int framedur = AV_RB32(st->codecpar->extradata + 12);
2107  st->avg_frame_rate.num *= timescale;
2108  st->avg_frame_rate.den *= framedur;
2109 #if FF_API_LAVF_AVCTX
2110 FF_DISABLE_DEPRECATION_WARNINGS
2111  st->codec->time_base.den *= timescale;
2112  st->codec->time_base.num *= framedur;
2113 FF_ENABLE_DEPRECATION_WARNINGS
2114 #endif
2115  }
2116  if (size > 30) {
2117  uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2118  uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2119  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2120  uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2121  if (str_size > 0 && size >= (int)str_size + 26) {
2122  char *reel_name = av_malloc(str_size + 1);
2123  if (!reel_name)
2124  return AVERROR(ENOMEM);
2125  memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2126  reel_name[str_size] = 0; /* Add null terminator */
2127  /* don't add reel_name if emtpy string */
2128  if (*reel_name == 0) {
2129  av_free(reel_name);
2130  } else {
2131  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2132  }
2133  }
2134  }
2135  }
2136  }
2137  } else {
2138  /* other codec type, just skip (rtp, mp4s ...) */
2139  avio_skip(pb, size);
2140  }
2141  return 0;
2142 }
2143 
2144 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
2145  AVStream *st, MOVStreamContext *sc)
2146 {
2147  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2148  !st->codecpar->sample_rate && sc->time_scale > 1)
2149  st->codecpar->sample_rate = sc->time_scale;
2150 
2151  /* special codec parameters handling */
2152  switch (st->codecpar->codec_id) {
2153 #if CONFIG_DV_DEMUXER
2154  case AV_CODEC_ID_DVAUDIO:
2155  c->dv_fctx = avformat_alloc_context();
2156  if (!c->dv_fctx) {
2157  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2158  return AVERROR(ENOMEM);
2159  }
2160  c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
2161  if (!c->dv_demux) {
2162  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2163  return AVERROR(ENOMEM);
2164  }
2165  sc->dv_audio_container = 1;
2166  st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
2167  break;
2168 #endif
2169  /* no ifdef since parameters are always those */
2170  case AV_CODEC_ID_QCELP:
2171  st->codecpar->channels = 1;
2172  // force sample rate for qcelp when not stored in mov
2173  if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2174  st->codecpar->sample_rate = 8000;
2175  // FIXME: Why is the following needed for some files?
2176  sc->samples_per_frame = 160;
2177  if (!sc->bytes_per_frame)
2178  sc->bytes_per_frame = 35;
2179  break;
2180  case AV_CODEC_ID_AMR_NB:
2181  st->codecpar->channels = 1;
2182  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2183  st->codecpar->sample_rate = 8000;
2184  break;
2185  case AV_CODEC_ID_AMR_WB:
2186  st->codecpar->channels = 1;
2187  st->codecpar->sample_rate = 16000;
2188  break;
2189  case AV_CODEC_ID_MP2:
2190  case AV_CODEC_ID_MP3:
2191  /* force type after stsd for m1a hdlr */
2192  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2193  break;
2194  case AV_CODEC_ID_GSM:
2195  case AV_CODEC_ID_ADPCM_MS:
2196  case AV_CODEC_ID_ADPCM_IMA_WAV:
2197  case AV_CODEC_ID_ILBC:
2198  case AV_CODEC_ID_MACE3:
2199  case AV_CODEC_ID_MACE6:
2200  case AV_CODEC_ID_QDM2:
2201  st->codecpar->block_align = sc->bytes_per_frame;
2202  break;
2203  case AV_CODEC_ID_ALAC:
2204  if (st->codecpar->extradata_size == 36) {
2205  st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2206  st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2207  }
2208  break;
2209  case AV_CODEC_ID_AC3:
2210  case AV_CODEC_ID_EAC3:
2211  case AV_CODEC_ID_MPEG1VIDEO:
2212  case AV_CODEC_ID_VC1:
2213  case AV_CODEC_ID_VP9:
2214  st->need_parsing = AVSTREAM_PARSE_FULL;
2215  break;
2216  default:
2217  break;
2218  }
2219  return 0;
2220 }
2221 
2222 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
2223  int codec_tag, int format,
2224  int64_t size)
2225 {
2226  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2227 
2228  if (codec_tag &&
2229  (codec_tag != format &&
2230  // AVID 1:1 samples with differing data format and codec tag exist
2231  (codec_tag != AV_RL32("AV1x") || format != AV_RL32("AVup")) &&
2232  // prores is allowed to have differing data format and codec tag
2233  codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
2234  // so is dv (sigh)
2235  codec_tag != AV_RL32("dvpp") && codec_tag != AV_RL32("dvcp") &&
2236  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2237  : codec_tag != MKTAG('j','p','e','g')))) {
2238  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2239  * export it as a separate AVStream but this needs a few changes
2240  * in the MOV demuxer, patch welcome. */
2241 
2242  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2243  avio_skip(pb, size);
2244  return 1;
2245  }
2246 
2247  return 0;
2248 }
2249 
2250 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
2251 {
2252  AVStream *st;
2253  MOVStreamContext *sc;
2254  int pseudo_stream_id;
2255 
2256  if (c->fc->nb_streams < 1)
2257  return 0;
2258  st = c->fc->streams[c->fc->nb_streams-1];
2259  sc = st->priv_data;
2260 
2261  for (pseudo_stream_id = 0;
2262  pseudo_stream_id < entries && !pb->eof_reached;
2263  pseudo_stream_id++) {
2264  //Parsing Sample description table
2265  enum AVCodecID id;
2266  int ret, dref_id = 1;
2267  MOVAtom a = { AV_RL32("stsd") };
2268  int64_t start_pos = avio_tell(pb);
2269  int64_t size = avio_rb32(pb); /* size */
2270  uint32_t format = avio_rl32(pb); /* data format */
2271 
2272  if (size >= 16) {
2273  avio_rb32(pb); /* reserved */
2274  avio_rb16(pb); /* reserved */
2275  dref_id = avio_rb16(pb);
2276  } else if (size <= 7) {
2277  av_log(c->fc, AV_LOG_ERROR,
2278  "invalid size %"PRId64" in stsd\n", size);
2279  return AVERROR_INVALIDDATA;
2280  }
2281 
2282  if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2283  size - (avio_tell(pb) - start_pos)))
2284  continue;
2285 
2286  sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2287  sc->dref_id= dref_id;
2288  sc->format = format;
2289 
2290  id = mov_codec_id(st, format);
2291 
2292  av_log(c->fc, AV_LOG_TRACE,
2293  "size=%"PRId64" 4CC=%s codec_type=%d\n", size,
2294  av_fourcc2str(format), st->codecpar->codec_type);
2295 
2296  if (st->codecpar->codec_type==AVMEDIA_TYPE_VIDEO) {
2297  st->codecpar->codec_id = id;
2298  mov_parse_stsd_video(c, pb, st, sc);
2299  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2300  st->codecpar->codec_id = id;
2301  mov_parse_stsd_audio(c, pb, st, sc);
2302  if (st->codecpar->sample_rate < 0) {
2303  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
2304  return AVERROR_INVALIDDATA;
2305  }
2306  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2307  st->codecpar->codec_id = id;
2308  mov_parse_stsd_subtitle(c, pb, st, sc,
2309  size - (avio_tell(pb) - start_pos));
2310  } else {
2311  ret = mov_parse_stsd_data(c, pb, st, sc,
2312  size - (avio_tell(pb) - start_pos));
2313  if (ret < 0)
2314  return ret;
2315  }
2316  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2317  a.size = size - (avio_tell(pb) - start_pos);
2318  if (a.size > 8) {
2319  if ((ret = mov_read_default(c, pb, a)) < 0)
2320  return ret;
2321  } else if (a.size > 0)
2322  avio_skip(pb, a.size);
2323 
2324  if (sc->extradata) {
2325  int extra_size = st->codecpar->extradata_size;
2326 
2327  /* Move the current stream extradata to the stream context one. */
2328  sc->extradata_size[pseudo_stream_id] = extra_size;
2329  sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
2330  if (!sc->extradata[pseudo_stream_id])
2331  return AVERROR(ENOMEM);
2332  memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
2333  av_freep(&st->codecpar->extradata);
2334  st->codecpar->extradata_size = 0;
2335  }
2336  }
2337 
2338  if (pb->eof_reached)
2339  return AVERROR_EOF;
2340 
2341  return 0;
2342 }
2343 
2344 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2345 {
2346  AVStream *st;
2347  MOVStreamContext *sc;
2348  int ret, entries;
2349 
2350  if (c->fc->nb_streams < 1)
2351  return 0;
2352  st = c->fc->streams[c->fc->nb_streams - 1];
2353  sc = st->priv_data;
2354 
2355  avio_r8(pb); /* version */
2356  avio_rb24(pb); /* flags */
2357  entries = avio_rb32(pb);
2358 
2359  if (entries <= 0) {
2360  av_log(c->fc, AV_LOG_ERROR, "invalid STSD entries %d\n", entries);
2361  return AVERROR_INVALIDDATA;
2362  }
2363 
2364  if (sc->extradata) {
2365  av_log(c->fc, AV_LOG_ERROR, "Duplicate STSD\n");
2366  return AVERROR_INVALIDDATA;
2367  }
2368  /* Prepare space for hosting multiple extradata. */
2369  sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
2370  sc->extradata_size = av_mallocz_array(entries, sizeof(*sc->extradata_size));
2371  if (!sc->extradata_size || !sc->extradata) {
2372  ret = AVERROR(ENOMEM);
2373  goto fail;
2374  }
2375 
2376  ret = ff_mov_read_stsd_entries(c, pb, entries);
2377  if (ret < 0)
2378  return ret;
2379 
2380  sc->stsd_count = entries;
2381 
2382  /* Restore back the primary extradata. */
2383  av_freep(&st->codecpar->extradata);
2384  st->codecpar->extradata_size = sc->extradata_size[0];
2385  if (sc->extradata_size[0]) {
2386  st->codecpar->extradata = av_mallocz(sc->extradata_size[0] + AV_INPUT_BUFFER_PADDING_SIZE);
2387  if (!st->codecpar->extradata)
2388  return AVERROR(ENOMEM);
2389  memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
2390  }
2391 
2392  return mov_finalize_stsd_codec(c, pb, st, sc);
2393 fail:
2394  av_freep(&sc->extradata);
2395  av_freep(&sc->extradata_size);
2396  return ret;
2397 }
2398 
2399 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2400 {
2401  AVStream *st;
2402  MOVStreamContext *sc;
2403  unsigned int i, entries;
2404 
2405  if (c->fc->nb_streams < 1)
2406  return 0;
2407  st = c->fc->streams[c->fc->nb_streams-1];
2408  sc = st->priv_data;
2409 
2410  avio_r8(pb); /* version */
2411  avio_rb24(pb); /* flags */
2412 
2413  entries = avio_rb32(pb);
2414  if ((uint64_t)entries * 12 + 4 > atom.size)
2415  return AVERROR_INVALIDDATA;
2416 
2417  av_log(c->fc, AV_LOG_TRACE, "track[%u].stsc.entries = %u\n", c->fc->nb_streams - 1, entries);
2418 
2419  if (!entries)
2420  return 0;
2421  if (sc->stsc_data)
2422  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2423  av_free(sc->stsc_data);
2424  sc->stsc_count = 0;
2425  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2426  if (!sc->stsc_data)
2427  return AVERROR(ENOMEM);
2428 
2429  for (i = 0; i < entries && !pb->eof_reached; i++) {
2430  sc->stsc_data[i].first = avio_rb32(pb);
2431  sc->stsc_data[i].count = avio_rb32(pb);
2432  sc->stsc_data[i].id = avio_rb32(pb);
2433  }
2434 
2435  sc->stsc_count = i;
2436 
2437  if (pb->eof_reached)
2438  return AVERROR_EOF;
2439 
2440  return 0;
2441 }
2442 
2443 #define mov_stsc_index_valid(index, count) ((index) < (count) - 1)
2444 
2445 /* Compute the samples value for the stsc entry at the given index. */
2446 static inline int mov_get_stsc_samples(MOVStreamContext *sc, int index)
2447 {
2448  int chunk_count;
2449 
2450  if (mov_stsc_index_valid(index, sc->stsc_count))
2451  chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2452  else
2453  chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2454 
2455  return sc->stsc_data[index].count * chunk_count;
2456 }
2457 
2458 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2459 {
2460  AVStream *st;
2461  MOVStreamContext *sc;
2462  unsigned i, entries;
2463 
2464  if (c->fc->nb_streams < 1)
2465  return 0;
2466  st = c->fc->streams[c->fc->nb_streams-1];
2467  sc = st->priv_data;
2468 
2469  avio_rb32(pb); // version + flags
2470 
2471  entries = avio_rb32(pb);
2472  if (sc->stps_data)
2473  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2474  av_free(sc->stps_data);
2475  sc->stps_count = 0;
2476  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2477  if (!sc->stps_data)
2478  return AVERROR(ENOMEM);
2479 
2480  for (i = 0; i < entries && !pb->eof_reached; i++) {
2481  sc->stps_data[i] = avio_rb32(pb);
2482  }
2483 
2484  sc->stps_count = i;
2485 
2486  if (pb->eof_reached)
2487  return AVERROR_EOF;
2488 
2489  return 0;
2490 }
2491 
2492 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2493 {
2494  AVStream *st;
2495  MOVStreamContext *sc;
2496  unsigned int i, entries;
2497 
2498  if (c->fc->nb_streams < 1)
2499  return 0;
2500  st = c->fc->streams[c->fc->nb_streams-1];
2501  sc = st->priv_data;
2502 
2503  avio_r8(pb); /* version */
2504  avio_rb24(pb); /* flags */
2505 
2506  entries = avio_rb32(pb);
2507 
2508  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %u\n", entries);
2509 
2510  if (!entries)
2511  {
2512  sc->keyframe_absent = 1;
2513  if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2514  st->need_parsing = AVSTREAM_PARSE_HEADERS;
2515  return 0;
2516  }
2517  if (sc->keyframes)
2518  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2519  if (entries >= UINT_MAX / sizeof(int))
2520  return AVERROR_INVALIDDATA;
2521  av_freep(&sc->keyframes);
2522  sc->keyframe_count = 0;
2523  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2524  if (!sc->keyframes)
2525  return AVERROR(ENOMEM);
2526 
2527  for (i = 0; i < entries && !pb->eof_reached; i++) {
2528  sc->keyframes[i] = avio_rb32(pb);
2529  }
2530 
2531  sc->keyframe_count = i;
2532 
2533  if (pb->eof_reached)
2534  return AVERROR_EOF;
2535 
2536  return 0;
2537 }
2538 
2539 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2540 {
2541  AVStream *st;
2542  MOVStreamContext *sc;
2543  unsigned int i, entries, sample_size, field_size, num_bytes;
2544  GetBitContext gb;
2545  unsigned char* buf;
2546  int ret;
2547 
2548  if (c->fc->nb_streams < 1)
2549  return 0;
2550  st = c->fc->streams[c->fc->nb_streams-1];
2551  sc = st->priv_data;
2552 
2553  avio_r8(pb); /* version */
2554  avio_rb24(pb); /* flags */
2555 
2556  if (atom.type == MKTAG('s','t','s','z')) {
2557  sample_size = avio_rb32(pb);
2558  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2559  sc->sample_size = sample_size;
2560  sc->stsz_sample_size = sample_size;
2561  field_size = 32;
2562  } else {
2563  sample_size = 0;
2564  avio_rb24(pb); /* reserved */
2565  field_size = avio_r8(pb);
2566  }
2567  entries = avio_rb32(pb);
2568 
2569  av_log(c->fc, AV_LOG_TRACE, "sample_size = %u sample_count = %u\n", sc->sample_size, entries);
2570 
2571  sc->sample_count = entries;
2572  if (sample_size)
2573  return 0;
2574 
2575  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2576  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %u\n", field_size);
2577  return AVERROR_INVALIDDATA;
2578  }
2579 
2580  if (!entries)
2581  return 0;
2582  if (entries >= (UINT_MAX - 4) / field_size)
2583  return AVERROR_INVALIDDATA;
2584  if (sc->sample_sizes)
2585  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2586  av_free(sc->sample_sizes);
2587  sc->sample_count = 0;
2588  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2589  if (!sc->sample_sizes)
2590  return AVERROR(ENOMEM);
2591 
2592  num_bytes = (entries*field_size+4)>>3;
2593 
2594  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2595  if (!buf) {
2596  av_freep(&sc->sample_sizes);
2597  return AVERROR(ENOMEM);
2598  }
2599 
2600  ret = ffio_read_size(pb, buf, num_bytes);
2601  if (ret < 0) {
2602  av_freep(&sc->sample_sizes);
2603  av_free(buf);
2604  return ret;
2605  }
2606 
2607  init_get_bits(&gb, buf, 8*num_bytes);
2608 
2609  for (i = 0; i < entries && !pb->eof_reached; i++) {
2610  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2611  sc->data_size += sc->sample_sizes[i];
2612  }
2613 
2614  sc->sample_count = i;
2615 
2616  av_free(buf);
2617 
2618  if (pb->eof_reached)
2619  return AVERROR_EOF;
2620 
2621  return 0;
2622 }
2623 
2624 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2625 {
2626  AVStream *st;
2627  MOVStreamContext *sc;
2628  unsigned int i, entries;
2629  int64_t duration=0;
2630  int64_t total_sample_count=0;
2631 
2632  if (c->fc->nb_streams < 1)
2633  return 0;
2634  st = c->fc->streams[c->fc->nb_streams-1];
2635  sc = st->priv_data;
2636 
2637  avio_r8(pb); /* version */
2638  avio_rb24(pb); /* flags */
2639  entries = avio_rb32(pb);
2640 
2641  av_log(c->fc, AV_LOG_TRACE, "track[%u].stts.entries = %u\n",
2642  c->fc->nb_streams-1, entries);
2643 
2644  if (sc->stts_data)
2645  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2646  av_free(sc->stts_data);
2647  sc->stts_count = 0;
2648  sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2649  if (!sc->stts_data)
2650  return AVERROR(ENOMEM);
2651 
2652  for (i = 0; i < entries && !pb->eof_reached; i++) {
2653  int sample_duration;
2654  int sample_count;
2655 
2656  sample_count=avio_rb32(pb);
2657  sample_duration = avio_rb32(pb);
2658 
2659  if (sample_count < 0) {
2660  av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2661  return AVERROR_INVALIDDATA;
2662  }
2663  sc->stts_data[i].count= sample_count;
2664  sc->stts_data[i].duration= sample_duration;
2665 
2666  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2667  sample_count, sample_duration);
2668 
2669  if ( i+1 == entries
2670  && i
2671  && sample_count == 1
2672  && total_sample_count > 100
2673  && sample_duration/10 > duration / total_sample_count)
2674  sample_duration = duration / total_sample_count;
2675  duration+=(int64_t)sample_duration*sample_count;
2676  total_sample_count+=sample_count;
2677  }
2678 
2679  sc->stts_count = i;
2680 
2681  sc->duration_for_fps += duration;
2682  sc->nb_frames_for_fps += total_sample_count;
2683 
2684  if (pb->eof_reached)
2685  return AVERROR_EOF;
2686 
2687  st->nb_frames= total_sample_count;
2688  if (duration)
2689  st->duration= duration;
2690  sc->track_end = duration;
2691  return 0;
2692 }
2693 
2694 static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
2695 {
2696  if (duration < 0) {
2697  if (duration == INT_MIN) {
2698  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2699  duration++;
2700  }
2701  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2702  }
2703 }
2704 
2705 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2706 {
2707  AVStream *st;
2708  MOVStreamContext *sc;
2709  unsigned int i, entries, ctts_count = 0;
2710 
2711  if (c->fc->nb_streams < 1)
2712  return 0;
2713  st = c->fc->streams[c->fc->nb_streams-1];
2714  sc = st->priv_data;
2715 
2716  avio_r8(pb); /* version */
2717  avio_rb24(pb); /* flags */
2718  entries = avio_rb32(pb);
2719 
2720  av_log(c->fc, AV_LOG_TRACE, "track[%u].ctts.entries = %u\n", c->fc->nb_streams - 1, entries);
2721 
2722  if (!entries)
2723  return 0;
2724  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2725  return AVERROR_INVALIDDATA;
2726  av_freep(&sc->ctts_data);
2727  sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2728  if (!sc->ctts_data)
2729  return AVERROR(ENOMEM);
2730 
2731  for (i = 0; i < entries && !pb->eof_reached; i++) {
2732  int count =avio_rb32(pb);
2733  int duration =avio_rb32(pb);
2734 
2735  if (count <= 0) {
2736  av_log(c->fc, AV_LOG_TRACE,
2737  "ignoring CTTS entry with count=%d duration=%d\n",
2738  count, duration);
2739  continue;
2740  }
2741 
2742  sc->ctts_data[ctts_count].count = count;
2743  sc->ctts_data[ctts_count].duration = duration;
2744  ctts_count++;
2745 
2746  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2747  count, duration);
2748 
2749  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2750  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2751  av_freep(&sc->ctts_data);
2752  sc->ctts_count = 0;
2753  return 0;
2754  }
2755 
2756  if (i+2<entries)
2757  mov_update_dts_shift(sc, duration);
2758  }
2759 
2760  sc->ctts_count = ctts_count;
2761 
2762  if (pb->eof_reached)
2763  return AVERROR_EOF;
2764 
2765  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2766 
2767  return 0;
2768 }
2769 
2770 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2771 {
2772  AVStream *st;
2773  MOVStreamContext *sc;
2774  unsigned int i, entries;
2775  uint8_t version;
2776  uint32_t grouping_type;
2777 
2778  if (c->fc->nb_streams < 1)
2779  return 0;
2780  st = c->fc->streams[c->fc->nb_streams-1];
2781  sc = st->priv_data;
2782 
2783  version = avio_r8(pb); /* version */
2784  avio_rb24(pb); /* flags */
2785  grouping_type = avio_rl32(pb);
2786  if (grouping_type != MKTAG( 'r','a','p',' '))
2787  return 0; /* only support 'rap ' grouping */
2788  if (version == 1)
2789  avio_rb32(pb); /* grouping_type_parameter */
2790 
2791  entries = avio_rb32(pb);
2792  if (!entries)
2793  return 0;
2794  if (sc->rap_group)
2795  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2796  av_free(sc->rap_group);
2797  sc->rap_group_count = 0;
2798  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2799  if (!sc->rap_group)
2800  return AVERROR(ENOMEM);
2801 
2802  for (i = 0; i < entries && !pb->eof_reached; i++) {
2803  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2804  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2805  }
2806 
2807  sc->rap_group_count = i;
2808 
2809  return pb->eof_reached ? AVERROR_EOF : 0;
2810 }
2811 
2812 /**
2813  * Get ith edit list entry (media time, duration).
2814  */
2815 static int get_edit_list_entry(MOVContext *mov,
2816  const MOVStreamContext *msc,
2817  unsigned int edit_list_index,
2818  int64_t *edit_list_media_time,
2819  int64_t *edit_list_duration,
2820  int64_t global_timescale)
2821 {
2822  if (edit_list_index == msc->elst_count) {
2823  return 0;
2824  }
2825  *edit_list_media_time = msc->elst_data[edit_list_index].time;
2826  *edit_list_duration = msc->elst_data[edit_list_index].duration;
2827 
2828  /* duration is in global timescale units;convert to msc timescale */
2829  if (global_timescale == 0) {
2830  avpriv_request_sample(mov->fc, "Support for mvhd.timescale = 0 with editlists");
2831  return 0;
2832  }
2833  *edit_list_duration = av_rescale(*edit_list_duration, msc->time_scale,
2834  global_timescale);
2835  return 1;
2836 }
2837 
2838 /**
2839  * Find the closest previous frame to the timestamp, in e_old index
2840  * entries. Searching for just any frame / just key frames can be controlled by
2841  * last argument 'flag'.
2842  * Returns the index of the entry in st->index_entries if successful,
2843  * else returns -1.
2844  */
2845 static int64_t find_prev_closest_index(AVStream *st,
2846  AVIndexEntry *e_old,
2847  int nb_old,
2848  int64_t timestamp,
2849  int flag)
2850 {
2851  AVIndexEntry *e_keep = st->index_entries;
2852  int nb_keep = st->nb_index_entries;
2853  int64_t found = -1;
2854  int64_t i = 0;
2855 
2856  st->index_entries = e_old;
2857  st->nb_index_entries = nb_old;
2858  found = av_index_search_timestamp(st, timestamp, flag | AVSEEK_FLAG_BACKWARD);
2859 
2860  // Keep going backwards in the index entries until the timestamp is the same.
2861  if (found >= 0) {
2862  for (i = found; i > 0 && e_old[i].timestamp == e_old[i - 1].timestamp;
2863  i--) {
2864  if ((flag & AVSEEK_FLAG_ANY) ||
2865  (e_old[i - 1].flags & AVINDEX_KEYFRAME)) {
2866  found = i - 1;
2867  }
2868  }
2869  }
2870 
2871  /* restore AVStream state*/
2872  st->index_entries = e_keep;
2873  st->nb_index_entries = nb_keep;
2874  return found;
2875 }
2876 
2877 /**
2878  * Add index entry with the given values, to the end of st->index_entries.
2879  * Returns the new size st->index_entries if successful, else returns -1.
2880  *
2881  * This function is similar to ff_add_index_entry in libavformat/utils.c
2882  * except that here we are always unconditionally adding an index entry to
2883  * the end, instead of searching the entries list and skipping the add if
2884  * there is an existing entry with the same timestamp.
2885  * This is needed because the mov_fix_index calls this func with the same
2886  * unincremented timestamp for successive discarded frames.
2887  */
2888 static int64_t add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2889  int size, int distance, int flags)
2890 {
2891  AVIndexEntry *entries, *ie;
2892  int64_t index = -1;
2893  const size_t min_size_needed = (st->nb_index_entries + 1) * sizeof(AVIndexEntry);
2894 
2895  // Double the allocation each time, to lower memory fragmentation.
2896  // Another difference from ff_add_index_entry function.
2897  const size_t requested_size =
2898  min_size_needed > st->index_entries_allocated_size ?
2899  FFMAX(min_size_needed, 2 * st->index_entries_allocated_size) :
2900  min_size_needed;
2901 
2902  if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
2903  return -1;
2904 
2905  entries = av_fast_realloc(st->index_entries,
2906  &st->index_entries_allocated_size,
2907  requested_size);
2908  if(!entries)
2909  return -1;
2910 
2911  st->index_entries= entries;
2912 
2913  index= st->nb_index_entries++;
2914  ie= &entries[index];
2915 
2916  ie->pos = pos;
2917  ie->timestamp = timestamp;
2918  ie->min_distance= distance;
2919  ie->size= size;
2920  ie->flags = flags;
2921  return index;
2922 }
2923 
2924 /**
2925  * Rewrite timestamps of index entries in the range [end_index - frame_duration_buffer_size, end_index)
2926  * by subtracting end_ts successively by the amounts given in frame_duration_buffer.
2927  */
2928 static void fix_index_entry_timestamps(AVStream* st, int end_index, int64_t end_ts,
2929  int64_t* frame_duration_buffer,
2930  int frame_duration_buffer_size) {
2931  int i = 0;
2932  av_assert0(end_index >= 0 && end_index <= st->nb_index_entries);
2933  for (i = 0; i < frame_duration_buffer_size; i++) {
2934  end_ts -= frame_duration_buffer[frame_duration_buffer_size - 1 - i];
2935  st->index_entries[end_index - 1 - i].timestamp = end_ts;
2936  }
2937 }
2938 
2939 /**
2940  * Append a new ctts entry to ctts_data.
2941  * Returns the new ctts_count if successful, else returns -1.
2942  */
2943 static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
2944  int count, int duration)
2945 {
2946  MOVStts *ctts_buf_new;
2947  const size_t min_size_needed = (*ctts_count + 1) * sizeof(MOVStts);
2948  const size_t requested_size =
2949  min_size_needed > *allocated_size ?
2950  FFMAX(min_size_needed, 2 * (*allocated_size)) :
2951  min_size_needed;
2952 
2953  if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts))
2954  return -1;
2955 
2956  ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);
2957 
2958  if(!ctts_buf_new)
2959  return -1;
2960 
2961  *ctts_data = ctts_buf_new;
2962 
2963  ctts_buf_new[*ctts_count].count = count;
2964  ctts_buf_new[*ctts_count].duration = duration;
2965 
2966  *ctts_count = (*ctts_count) + 1;
2967  return *ctts_count;
2968 }
2969 
2970 static void mov_current_sample_inc(MOVStreamContext *sc)
2971 {
2972  sc->current_sample++;
2973  sc->current_index++;
2974  if (sc->index_ranges &&
2975  sc->current_index >= sc->current_index_range->end &&
2976  sc->current_index_range->end) {
2977  sc->current_index_range++;
2978  sc->current_index = sc->current_index_range->start;
2979  }
2980 }
2981 
2982 static void mov_current_sample_dec(MOVStreamContext *sc)
2983 {
2984  sc->current_sample--;
2985  sc->current_index--;
2986  if (sc->index_ranges &&
2987  sc->current_index < sc->current_index_range->start &&
2988  sc->current_index_range > sc->index_ranges) {
2989  sc->current_index_range--;
2990  sc->current_index = sc->current_index_range->end - 1;
2991  }
2992 }
2993 
2994 static void mov_current_sample_set(MOVStreamContext *sc, int current_sample)
2995 {
2996  int64_t range_size;
2997 
2998  sc->current_sample = current_sample;
2999  sc->current_index = current_sample;
3000  if (!sc->index_ranges) {
3001  return;
3002  }
3003 
3004  for (sc->current_index_range = sc->index_ranges;
3005  sc->current_index_range->end;
3006  sc->current_index_range++) {
3007  range_size = sc->current_index_range->end - sc->current_index_range->start;
3008  if (range_size > current_sample) {
3009  sc->current_index = sc->current_index_range->start + current_sample;
3010  break;
3011  }
3012  current_sample -= range_size;
3013  }
3014 }
3015 
3016 /**
3017  * Fix st->index_entries, so that it contains only the entries (and the entries
3018  * which are needed to decode them) that fall in the edit list time ranges.
3019  * Also fixes the timestamps of the index entries to match the timeline
3020  * specified the edit lists.
3021  */
3022 static void mov_fix_index(MOVContext *mov, AVStream *st)
3023 {
3024  MOVStreamContext *msc = st->priv_data;
3025  AVIndexEntry *e_old = st->index_entries;
3026  int nb_old = st->nb_index_entries;
3027  const AVIndexEntry *e_old_end = e_old + nb_old;
3028  const AVIndexEntry *current = NULL;
3029  MOVStts *ctts_data_old = msc->ctts_data;
3030  int64_t ctts_index_old = 0;
3031  int64_t ctts_sample_old = 0;
3032  int64_t ctts_count_old = msc->ctts_count;
3033  int64_t edit_list_media_time = 0;
3034  int64_t edit_list_duration = 0;
3035  int64_t frame_duration = 0;
3036  int64_t edit_list_dts_counter = 0;
3037  int64_t edit_list_dts_entry_end = 0;
3038  int64_t edit_list_start_ctts_sample = 0;
3039  int64_t curr_cts;
3040  int64_t edit_list_index = 0;
3041  int64_t index;
3042  int64_t index_ctts_count;
3043  int flags;
3044  unsigned int ctts_allocated_size = 0;
3045  int64_t start_dts = 0;
3046  int64_t edit_list_media_time_dts = 0;
3047  int64_t edit_list_start_encountered = 0;
3048  int64_t search_timestamp = 0;
3049  int64_t* frame_duration_buffer = NULL;
3050  int num_discarded_begin = 0;
3051  int first_non_zero_audio_edit = -1;
3052  int packet_skip_samples = 0;
3053  MOVIndexRange *current_index_range;
3054 
3055  if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
3056  return;
3057  }
3058 
3059  // allocate the index ranges array
3060  msc->index_ranges = av_malloc((msc->elst_count + 1) * sizeof(msc->index_ranges[0]));
3061  if (!msc->index_ranges) {
3062  av_log(mov->fc, AV_LOG_ERROR, "Cannot allocate index ranges buffer\n");
3063  return;
3064  }
3065  msc->current_index_range = msc->index_ranges;
3066  current_index_range = msc->index_ranges - 1;
3067 
3068  // Clean AVStream from traces of old index
3069  st->index_entries = NULL;
3070  st->index_entries_allocated_size = 0;
3071  st->nb_index_entries = 0;
3072 
3073  // Clean ctts fields of MOVStreamContext
3074  msc->ctts_data = NULL;
3075  msc->ctts_count = 0;
3076  msc->ctts_index = 0;
3077  msc->ctts_sample = 0;
3078 
3079  // If the dts_shift is positive (in case of negative ctts values in mov),
3080  // then negate the DTS by dts_shift
3081  if (msc->dts_shift > 0)
3082  edit_list_dts_entry_end -= msc->dts_shift;
3083 
3084  // Offset the DTS by ctts[0] to make the PTS of the first frame 0
3085  if (ctts_data_old && ctts_count_old > 0) {
3086  edit_list_dts_entry_end -= ctts_data_old[0].duration;
3087  av_log(mov->fc, AV_LOG_DEBUG, "Offset DTS by ctts[%d].duration: %d\n", 0, ctts_data_old[0].duration);
3088  }
3089 
3090  start_dts = edit_list_dts_entry_end;
3091 
3092  while (get_edit_list_entry(mov, msc, edit_list_index, &edit_list_media_time,
3093  &edit_list_duration, mov->time_scale)) {
3094  av_log(mov->fc, AV_LOG_DEBUG, "Processing st: %d, edit list %"PRId64" - media time: %"PRId64", duration: %"PRId64"\n",
3095  st->index, edit_list_index, edit_list_media_time, edit_list_duration);
3096  edit_list_index++;
3097  edit_list_dts_counter = edit_list_dts_entry_end;
3098  edit_list_dts_entry_end += edit_list_duration;
3099  num_discarded_begin = 0;
3100  if (edit_list_media_time == -1) {
3101  continue;
3102  }
3103 
3104  // If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
3105  // according to the edit list below.
3106  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3107  if (first_non_zero_audio_edit < 0) {
3108  first_non_zero_audio_edit = 1;
3109  } else {
3110  first_non_zero_audio_edit = 0;
3111  }
3112 
3113  if (first_non_zero_audio_edit > 0)
3114  st->skip_samples = msc->start_pad = 0;
3115  }
3116 
3117  //find closest previous key frame
3118  edit_list_media_time_dts = edit_list_media_time;
3119  if (msc->dts_shift > 0) {
3120  edit_list_media_time_dts -= msc->dts_shift;
3121  }
3122 
3123  // While reordering frame index according to edit list we must handle properly
3124  // the scenario when edit list entry starts from none key frame.
3125  // We find closest previous key frame and preserve it and consequent frames in index.
3126  // All frames which are outside edit list entry time boundaries will be dropped after decoding.
3127  search_timestamp = edit_list_media_time_dts;
3128  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3129  // Audio decoders like AAC need need a decoder delay samples previous to the current sample,
3130  // to correctly decode this frame. Hence for audio we seek to a frame 1 sec. before the
3131  // edit_list_media_time to cover the decoder delay.
3132  search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
3133  }
3134 
3135  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, 0);
3136  if (index == -1) {
3137  av_log(mov->fc, AV_LOG_WARNING,
3138  "st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
3139  st->index, edit_list_index, search_timestamp);
3140  index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, AVSEEK_FLAG_ANY);
3141 
3142  if (index == -1) {
3143  av_log(mov->fc, AV_LOG_WARNING,
3144  "st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n"
3145  "Rounding edit list media time to zero.\n",
3146  st->index, edit_list_index, search_timestamp);
3147  index = 0;
3148  edit_list_media_time = 0;
3149  }
3150  }
3151  current = e_old + index;
3152 
3153  ctts_index_old = 0;
3154  ctts_sample_old = 0;
3155 
3156  // set ctts_index properly for the found key frame
3157  for (index_ctts_count = 0; index_ctts_count < index; index_ctts_count++) {
3158  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3159  ctts_sample_old++;
3160  if (ctts_data_old[ctts_index_old].count == ctts_sample_old) {
3161  ctts_index_old++;
3162  ctts_sample_old = 0;
3163  }
3164  }
3165  }
3166 
3167  edit_list_start_ctts_sample = ctts_sample_old;
3168 
3169  // Iterate over index and arrange it according to edit list
3170  edit_list_start_encountered = 0;
3171  for (; current < e_old_end; current++, index++) {
3172  // check if frame outside edit list mark it for discard
3173  frame_duration = (current + 1 < e_old_end) ?
3174  ((current + 1)->timestamp - current->timestamp) : edit_list_duration;
3175 
3176  flags = current->flags;
3177 
3178  // frames (pts) before or after edit list
3179  curr_cts = current->timestamp + msc->dts_shift;
3180 
3181  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3182  av_log(mov->fc, AV_LOG_DEBUG, "shifted frame pts, curr_cts: %"PRId64" @ %"PRId64", ctts: %d, ctts_count: %"PRId64"\n",
3183  curr_cts, ctts_index_old, ctts_data_old[ctts_index_old].duration, ctts_count_old);
3184  curr_cts += ctts_data_old[ctts_index_old].duration;
3185  ctts_sample_old++;
3186  if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
3187  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3188  &ctts_allocated_size,
3189  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3190  ctts_data_old[ctts_index_old].duration) == -1) {
3191  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3192  ctts_index_old,
3193  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3194  ctts_data_old[ctts_index_old].duration);
3195  break;
3196  }
3197  ctts_index_old++;
3198  ctts_sample_old = 0;
3199  edit_list_start_ctts_sample = 0;
3200  }
3201  }
3202 
3203  if (curr_cts < edit_list_media_time || curr_cts >= (edit_list_duration + edit_list_media_time)) {
3204  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->codec_id != AV_CODEC_ID_VORBIS &&
3205  curr_cts < edit_list_media_time && curr_cts + frame_duration > edit_list_media_time &&
3206  first_non_zero_audio_edit > 0) {
3207  packet_skip_samples = edit_list_media_time - curr_cts;
3208  st->skip_samples += packet_skip_samples;
3209 
3210  // Shift the index entry timestamp by packet_skip_samples to be correct.
3211  edit_list_dts_counter -= packet_skip_samples;
3212  if (edit_list_start_encountered == 0) {
3213  edit_list_start_encountered = 1;
3214  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3215  // discarded packets.
3216  if (frame_duration_buffer) {
3217  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3218  frame_duration_buffer, num_discarded_begin);
3219  av_freep(&frame_duration_buffer);
3220  }
3221  }
3222 
3223  av_log(mov->fc, AV_LOG_DEBUG, "skip %d audio samples from curr_cts: %"PRId64"\n", packet_skip_samples, curr_cts);
3224  } else {
3225  flags |= AVINDEX_DISCARD_FRAME;
3226  av_log(mov->fc, AV_LOG_DEBUG, "drop a frame at curr_cts: %"PRId64" @ %"PRId64"\n", curr_cts, index);
3227 
3228  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && edit_list_start_encountered == 0) {
3229  num_discarded_begin++;
3230  frame_duration_buffer = av_realloc(frame_duration_buffer,
3231  num_discarded_begin * sizeof(int64_t));
3232  if (!frame_duration_buffer) {
3233  av_log(mov->fc, AV_LOG_ERROR, "Cannot reallocate frame duration buffer\n");
3234  break;
3235  }
3236  frame_duration_buffer[num_discarded_begin - 1] = frame_duration;
3237 
3238  // Increment skip_samples for the first non-zero audio edit list
3239  if (first_non_zero_audio_edit > 0 && st->codecpar->codec_id != AV_CODEC_ID_VORBIS) {
3240  st->skip_samples += frame_duration;
3241  msc->start_pad = st->skip_samples;
3242  }
3243  }
3244  }
3245  } else if (edit_list_start_encountered == 0) {
3246  edit_list_start_encountered = 1;
3247  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3248  // discarded packets.
3249  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && frame_duration_buffer) {
3250  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3251  frame_duration_buffer, num_discarded_begin);
3252  av_freep(&frame_duration_buffer);
3253  }
3254  }
3255 
3256  if (add_index_entry(st, current->pos, edit_list_dts_counter, current->size,
3257  current->min_distance, flags) == -1) {
3258  av_log(mov->fc, AV_LOG_ERROR, "Cannot add index entry\n");
3259  break;
3260  }
3261 
3262  // Update the index ranges array
3263  if (current_index_range < msc->index_ranges || index != current_index_range->end) {
3264  current_index_range++;
3265  current_index_range->start = index;
3266  }
3267  current_index_range->end = index + 1;
3268 
3269  // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list.
3270  if (edit_list_start_encountered > 0) {
3271  edit_list_dts_counter = edit_list_dts_counter + frame_duration;
3272  }
3273 
3274  // Break when found first key frame after edit entry completion
3275  if (((curr_cts + frame_duration) >= (edit_list_duration + edit_list_media_time)) &&
3276  ((flags & AVINDEX_KEYFRAME) || ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)))) {
3277 
3278  if (ctts_data_old && ctts_sample_old != 0) {
3279  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3280  &ctts_allocated_size,
3281  ctts_sample_old - edit_list_start_ctts_sample,
3282  ctts_data_old[ctts_index_old].duration) == -1) {
3283  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3284  ctts_index_old, ctts_sample_old - edit_list_start_ctts_sample,
3285  ctts_data_old[ctts_index_old].duration);
3286  break;
3287  }
3288  }
3289  break;
3290  }
3291  }
3292  }
3293  // Update av stream length
3294  st->duration = edit_list_dts_entry_end - start_dts;
3295 
3296  // Free the old index and the old CTTS structures
3297  av_free(e_old);
3298  av_free(ctts_data_old);
3299  av_freep(&frame_duration_buffer);
3300 
3301  // Null terminate the index ranges array
3302  current_index_range++;
3303  current_index_range->start = 0;
3304  current_index_range->end = 0;
3305  msc->current_index = msc->index_ranges[0].start;
3306 }
3307 
3308 static void mov_build_index(MOVContext *mov, AVStream *st)
3309 {
3310  MOVStreamContext *sc = st->priv_data;
3311  int64_t current_offset;
3312  int64_t current_dts = 0;
3313  unsigned int stts_index = 0;
3314  unsigned int stsc_index = 0;
3315  unsigned int stss_index = 0;
3316  unsigned int stps_index = 0;
3317  unsigned int i, j;
3318  uint64_t stream_size = 0;
3319 
3320  if (sc->elst_count) {
3321  int i, edit_start_index = 0, multiple_edits = 0;
3322  int64_t empty_duration = 0; // empty duration of the first edit list entry
3323  int64_t start_time = 0; // start time of the media
3324 
3325  for (i = 0; i < sc->elst_count; i++) {
3326  const MOVElst *e = &sc->elst_data[i];
3327  if (i == 0 && e->time == -1) {
3328  /* if empty, the first entry is the start time of the stream
3329  * relative to the presentation itself */
3330  empty_duration = e->duration;
3331  edit_start_index = 1;
3332  } else if (i == edit_start_index && e->time >= 0) {
3333  start_time = e->time;
3334  } else {
3335  multiple_edits = 1;
3336  }
3337  }
3338 
3339  if (multiple_edits && !mov->advanced_editlist)
3340  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
3341  "Use -advanced_editlist to correctly decode otherwise "
3342  "a/v desync might occur\n");
3343 
3344  /* adjust first dts according to edit list */
3345  if ((empty_duration || start_time) && mov->time_scale > 0) {
3346  if (empty_duration)
3347  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
3348  sc->time_offset = start_time - empty_duration;
3349  if (!mov->advanced_editlist)
3350  current_dts = -sc->time_offset;
3351  }
3352 
3353  if (!multiple_edits && !mov->advanced_editlist &&
3354  st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
3355  sc->start_pad = start_time;
3356  }
3357 
3358  /* only use old uncompressed audio chunk demuxing when stts specifies it */
3359  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3360  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
3361  unsigned int current_sample = 0;
3362  unsigned int stts_sample = 0;
3363  unsigned int sample_size;
3364  unsigned int distance = 0;
3365  unsigned int rap_group_index = 0;
3366  unsigned int rap_group_sample = 0;
3367  int64_t last_dts = 0;
3368  int64_t dts_correction = 0;
3369  int rap_group_present = sc->rap_group_count && sc->rap_group;
3370  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
3371 
3372  current_dts -= sc->dts_shift;
3373  last_dts = current_dts;
3374 
3375  if (!sc->sample_count || st->nb_index_entries)
3376  return;
3377  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3378  return;
3379  if (av_reallocp_array(&st->index_entries,
3380  st->nb_index_entries + sc->sample_count,
3381  sizeof(*st->index_entries)) < 0) {
3382  st->nb_index_entries = 0;
3383  return;
3384  }
3385  st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
3386 
3387  for (i = 0; i < sc->chunk_count; i++) {
3388  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
3389  current_offset = sc->chunk_offsets[i];
3390  while (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3391  i + 1 == sc->stsc_data[stsc_index + 1].first)
3392  stsc_index++;
3393 
3394  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
3395  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
3396  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
3397  sc->stsz_sample_size = sc->sample_size;
3398  }
3399  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
3400  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
3401  sc->stsz_sample_size = sc->sample_size;
3402  }
3403 
3404  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
3405  int keyframe = 0;
3406  if (current_sample >= sc->sample_count) {
3407  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
3408  return;
3409  }
3410 
3411  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
3412  keyframe = 1;
3413  if (stss_index + 1 < sc->keyframe_count)
3414  stss_index++;
3415  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
3416  keyframe = 1;
3417  if (stps_index + 1 < sc->stps_count)
3418  stps_index++;
3419  }
3420  if (rap_group_present && rap_group_index < sc->rap_group_count) {
3421  if (sc->rap_group[rap_group_index].index > 0)
3422  keyframe = 1;
3423  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
3424  rap_group_sample = 0;
3425  rap_group_index++;
3426  }
3427  }
3428  if (sc->keyframe_absent
3429  && !sc->stps_count
3430  && !rap_group_present
3431  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
3432  keyframe = 1;
3433  if (keyframe)
3434  distance = 0;
3435  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
3436  if (sc->pseudo_stream_id == -1 ||
3437  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
3438  AVIndexEntry *e;
3439  if (sample_size > 0x3FFFFFFF) {
3440  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
3441  return;
3442  }
3443  e = &st->index_entries[st->nb_index_entries++];
3444  e->pos = current_offset;
3445  e->timestamp = current_dts;
3446  e->size = sample_size;
3447  e->min_distance = distance;
3448  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
3449  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
3450  "size %u, distance %u, keyframe %d\n", st->index, current_sample,
3451  current_offset, current_dts, sample_size, distance, keyframe);
3452  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
3453  ff_rfps_add_frame(mov->fc, st, current_dts);
3454  }
3455 
3456  current_offset += sample_size;
3457  stream_size += sample_size;
3458 
3459  /* A negative sample duration is invalid based on the spec,
3460  * but some samples need it to correct the DTS. */
3461  if (sc->stts_data[stts_index].duration < 0) {
3462  av_log(mov->fc, AV_LOG_WARNING,
3463  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
3464  sc->stts_data[stts_index].duration, stts_index,
3465  st->index);
3466  dts_correction += sc->stts_data[stts_index].duration - 1;
3467  sc->stts_data[stts_index].duration = 1;
3468  }
3469  current_dts += sc->stts_data[stts_index].duration;
3470  if (!dts_correction || current_dts + dts_correction > last_dts) {
3471  current_dts += dts_correction;
3472  dts_correction = 0;
3473  } else {
3474  /* Avoid creating non-monotonous DTS */
3475  dts_correction += current_dts - last_dts - 1;
3476  current_dts = last_dts + 1;
3477  }
3478  last_dts = current_dts;
3479  distance++;
3480  stts_sample++;
3481  current_sample++;
3482  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
3483  stts_sample = 0;
3484  stts_index++;
3485  }
3486  }
3487  }
3488  if (st->duration > 0)
3489  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
3490  } else {
3491  unsigned chunk_samples, total = 0;
3492 
3493  // compute total chunk count
3494  for (i = 0; i < sc->stsc_count; i++) {
3495  unsigned count, chunk_count;
3496 
3497  chunk_samples = sc->stsc_data[i].count;
3498  if (i != sc->stsc_count - 1 &&
3499  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
3500  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
3501  return;
3502  }
3503 
3504  if (sc->samples_per_frame >= 160) { // gsm
3505  count = chunk_samples / sc->samples_per_frame;
3506  } else if (sc->samples_per_frame > 1) {
3507  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
3508  count = (chunk_samples+samples-1) / samples;
3509  } else {
3510  count = (chunk_samples+1023) / 1024;
3511  }
3512 
3513  if (mov_stsc_index_valid(i, sc->stsc_count))
3514  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
3515  else
3516  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
3517  total += chunk_count * count;
3518  }
3519 
3520  av_log(mov->fc, AV_LOG_TRACE, "chunk count %u\n", total);
3521  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3522  return;
3523  if (av_reallocp_array(&st->index_entries,
3524  st->nb_index_entries + total,
3525  sizeof(*st->index_entries)) < 0) {
3526  st->nb_index_entries = 0;
3527  return;
3528  }
3529  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
3530 
3531  // populate index
3532  for (i = 0; i < sc->chunk_count; i++) {
3533  current_offset = sc->chunk_offsets[i];
3534  if (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3535  i + 1 == sc->stsc_data[stsc_index + 1].first)
3536  stsc_index++;
3537  chunk_samples = sc->stsc_data[stsc_index].count;
3538 
3539  while (chunk_samples > 0) {
3540  AVIndexEntry *e;
3541  unsigned size, samples;
3542 
3543  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3544  avpriv_request_sample(mov->fc,
3545  "Zero bytes per frame, but %d samples per frame",
3546  sc->samples_per_frame);
3547  return;
3548  }
3549 
3550  if (sc->samples_per_frame >= 160) { // gsm
3551  samples = sc->samples_per_frame;
3552  size = sc->bytes_per_frame;
3553  } else {
3554  if (sc->samples_per_frame > 1) {
3555  samples = FFMIN((1024 / sc->samples_per_frame)*
3556  sc->samples_per_frame, chunk_samples);
3557  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3558  } else {
3559  samples = FFMIN(1024, chunk_samples);
3560  size = samples * sc->sample_size;
3561  }
3562  }
3563 
3564  if (st->nb_index_entries >= total) {
3565  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %u\n", total);
3566  return;
3567  }
3568  if (size > 0x3FFFFFFF) {
3569  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
3570  return;
3571  }
3572  e = &st->index_entries[st->nb_index_entries++];
3573  e->pos = current_offset;
3574  e->timestamp = current_dts;
3575  e->size = size;
3576  e->min_distance = 0;
3577  e->flags = AVINDEX_KEYFRAME;
3578  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %u, offset %"PRIx64", dts %"PRId64", "
3579  "size %u, duration %u\n", st->index, i, current_offset, current_dts,
3580  size, samples);
3581 
3582  current_offset += size;
3583  current_dts += samples;
3584  chunk_samples -= samples;
3585  }
3586  }
3587  }
3588 
3589  if (!mov->ignore_editlist && mov->advanced_editlist) {
3590  // Fix index according to edit lists.
3591  mov_fix_index(mov, st);
3592  }
3593 }
3594 
3595 static int test_same_origin(const char *src, const char *ref) {
3596  char src_proto[64];
3597  char ref_proto[64];
3598  char src_auth[256];
3599  char ref_auth[256];
3600  char src_host[256];
3601  char ref_host[256];
3602  int src_port=-1;
3603  int ref_port=-1;
3604 
3605  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
3606  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
3607 
3608  if (strlen(src) == 0) {
3609  return -1;
3610  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
3611  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
3612  strlen(src_host) + 1 >= sizeof(src_host) ||
3613  strlen(ref_host) + 1 >= sizeof(ref_host)) {
3614  return 0;
3615  } else if (strcmp(src_proto, ref_proto) ||
3616  strcmp(src_auth, ref_auth) ||
3617  strcmp(src_host, ref_host) ||
3618  src_port != ref_port) {
3619  return 0;
3620  } else
3621  return 1;
3622 }
3623 
3624 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
3625 {
3626  /* try relative path, we do not try the absolute because it can leak information about our
3627  system to an attacker */
3628  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
3629  char filename[1025];
3630  const char *src_path;
3631  int i, l;
3632 
3633  /* find a source dir */
3634  src_path = strrchr(src, '/');
3635  if (src_path)
3636  src_path++;
3637  else
3638  src_path = src;
3639 
3640  /* find a next level down to target */
3641  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
3642  if (ref->path[l] == '/') {
3643  if (i == ref->nlvl_to - 1)
3644  break;
3645  else
3646  i++;
3647  }
3648 
3649  /* compose filename if next level down to target was found */
3650  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3651  memcpy(filename, src, src_path - src);
3652  filename[src_path - src] = 0;
3653 
3654  for (i = 1; i < ref->nlvl_from; i++)
3655  av_strlcat(filename, "../", sizeof(filename));
3656 
3657  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3658  if (!c->use_absolute_path) {
3659  int same_origin = test_same_origin(src, filename);
3660 
3661  if (!same_origin) {
3662  av_log(c->fc, AV_LOG_ERROR,
3663  "Reference with mismatching origin, %s not tried for security reasons, "
3664  "set demuxer option use_absolute_path to allow it anyway\n",
3665  ref->path);
3666  return AVERROR(ENOENT);
3667  }
3668 
3669  if(strstr(ref->path + l + 1, "..") ||
3670  strstr(ref->path + l + 1, ":") ||
3671  (ref->nlvl_from > 1 && same_origin < 0) ||
3672  (filename[0] == '/' && src_path == src))
3673  return AVERROR(ENOENT);
3674  }
3675 
3676  if (strlen(filename) + 1 == sizeof(filename))
3677  return AVERROR(ENOENT);
3678  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3679  return 0;
3680  }
3681  } else if (c->use_absolute_path) {
3682  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3683  "this is a possible security issue\n");
3684  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3685  return 0;
3686  } else {
3687  av_log(c->fc, AV_LOG_ERROR,
3688  "Absolute path %s not tried for security reasons, "
3689  "set demuxer option use_absolute_path to allow absolute paths\n",
3690  ref->path);
3691  }
3692 
3693  return AVERROR(ENOENT);
3694 }
3695 
3696 static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
3697 {
3698  if (sc->time_scale <= 0) {
3699  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3700  sc->time_scale = c->time_scale;
3701  if (sc->time_scale <= 0)
3702  sc->time_scale = 1;
3703  }
3704 }
3705 
3706 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3707 {
3708  AVStream *st;
3709  MOVStreamContext *sc;
3710  int ret;
3711 
3712  st = avformat_new_stream(c->fc, NULL);
3713  if (!st) return AVERROR(ENOMEM);
3714  st->id = c->fc->nb_streams;
3715  sc = av_mallocz(sizeof(MOVStreamContext));
3716  if (!sc) return AVERROR(ENOMEM);
3717 
3718  st->priv_data = sc;
3719  st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3720  sc->ffindex = st->index;
3721  c->trak_index = st->index;
3722 
3723  if ((ret = mov_read_default(c, pb, atom)) < 0)
3724  return ret;
3725 
3726  c->trak_index = -1;
3727 
3728  /* sanity checks */
3729  if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3730  (!sc->sample_size && !sc->sample_count))) {
3731  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3732  st->index);
3733  return 0;
3734  }
3735 
3736  fix_timescale(c, sc);
3737 
3738  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3739 
3740  mov_build_index(c, st);
3741 
3742  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3743  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3744  if (c->enable_drefs) {
3745  if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3746  av_log(c->fc, AV_LOG_ERROR,
3747  "stream %d, error opening alias: path='%s', dir='%s', "
3748  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3749  st->index, dref->path, dref->dir, dref->filename,
3750  dref->volume, dref->nlvl_from, dref->nlvl_to);
3751  } else {
3752  av_log(c->fc, AV_LOG_WARNING,
3753  "Skipped opening external track: "
3754  "stream %d, alias: path='%s', dir='%s', "
3755  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3756  "Set enable_drefs to allow this.\n",
3757  st->index, dref->path, dref->dir, dref->filename,
3758  dref->volume, dref->nlvl_from, dref->nlvl_to);
3759  }
3760  } else {
3761  sc->pb = c->fc->pb;
3762  sc->pb_is_copied = 1;
3763  }
3764 
3765  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3766  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3767  sc->height && sc->width &&
3768  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3769  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3770  ((double)st->codecpar->width * sc->height), INT_MAX);
3771  }
3772 
3773 #if FF_API_R_FRAME_RATE
3774  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3775  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
3776  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3777 #endif
3778  }
3779 
3780  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3781  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3782  TAG_IS_AVCI(st->codecpar->codec_tag)) {
3783  ret = ff_generate_avci_extradata(st);
3784  if (ret < 0)
3785  return ret;
3786  }
3787 
3788  switch (st->codecpar->codec_id) {
3789 #if CONFIG_H261_DECODER
3790  case AV_CODEC_ID_H261:
3791 #endif
3792 #if CONFIG_H263_DECODER
3793  case AV_CODEC_ID_H263:
3794 #endif
3795 #if CONFIG_MPEG4_DECODER
3796  case AV_CODEC_ID_MPEG4:
3797 #endif
3798  st->codecpar->width = 0; /* let decoder init width/height */
3799  st->codecpar->height= 0;
3800  break;
3801  }
3802 
3803  // If the duration of the mp3 packets is not constant, then they could need a parser
3804  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3805  && sc->stts_count > 3
3806  && sc->stts_count*10 > st->nb_frames
3807  && sc->time_scale == st->codecpar->sample_rate) {
3808  st->need_parsing = AVSTREAM_PARSE_FULL;
3809  }
3810  /* Do not need those anymore. */
3811  av_freep(&sc->chunk_offsets);
3812  av_freep(&sc->sample_sizes);
3813  av_freep(&sc->keyframes);
3814  av_freep(&sc->stts_data);
3815  av_freep(&sc->stps_data);
3816  av_freep(&sc->elst_data);
3817  av_freep(&sc->rap_group);
3818 
3819  return 0;
3820 }
3821 
3822 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3823 {
3824  int ret;
3825  c->itunes_metadata = 1;
3826  ret = mov_read_default(c, pb, atom);
3827  c->itunes_metadata = 0;
3828  return ret;
3829 }
3830 
3831 static int mov_read_keys(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3832 {
3833  uint32_t count;
3834  uint32_t i;
3835 
3836  if (atom.size < 8)
3837  return 0;
3838 
3839  avio_skip(pb, 4);
3840  count = avio_rb32(pb);
3841  if (count > UINT_MAX / sizeof(*c->meta_keys) - 1) {
3842  av_log(c->fc, AV_LOG_ERROR,
3843  "The 'keys' atom with the invalid key count: %"PRIu32"\n", count);
3844  return AVERROR_INVALIDDATA;
3845  }
3846 
3847  c->meta_keys_count = count + 1;
3848  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3849  if (!c->meta_keys)
3850  return AVERROR(ENOMEM);
3851 
3852  for (i = 1; i <= count; ++i) {
3853  uint32_t key_size = avio_rb32(pb);
3854  uint32_t type = avio_rl32(pb);
3855  if (key_size < 8) {
3856  av_log(c->fc, AV_LOG_ERROR,
3857  "The key# %"PRIu32" in meta has invalid size:"
3858  "%"PRIu32"\n", i, key_size);
3859  return AVERROR_INVALIDDATA;
3860  }
3861  key_size -= 8;
3862  if (type != MKTAG('m','d','t','a')) {
3863  avio_skip(pb, key_size);
3864  }
3865  c->meta_keys[i] = av_mallocz(key_size + 1);
3866  if (!c->meta_keys[i])
3867  return AVERROR(ENOMEM);
3868  avio_read(pb, c->meta_keys[i], key_size);
3869  }
3870 
3871  return 0;
3872 }
3873 
3874 static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3875 {
3876  int64_t end = avio_tell(pb) + atom.size;
3877  uint8_t *key = NULL, *val = NULL, *mean = NULL;
3878  int i;
3879  int ret = 0;
3880  AVStream *st;
3881  MOVStreamContext *sc;
3882 
3883  if (c->fc->nb_streams < 1)
3884  return 0;
3885  st = c->fc->streams[c->fc->nb_streams-1];
3886  sc = st->priv_data;
3887 
3888  for (i = 0; i < 3; i++) {
3889  uint8_t **p;
3890  uint32_t len, tag;
3891 
3892  if (end - avio_tell(pb) <= 12)
3893  break;
3894 
3895  len = avio_rb32(pb);
3896  tag = avio_rl32(pb);
3897  avio_skip(pb, 4); // flags
3898 
3899  if (len < 12 || len - 12 > end - avio_tell(pb))
3900  break;
3901  len -= 12;
3902 
3903  if (tag == MKTAG('m', 'e', 'a', 'n'))
3904  p = &mean;
3905  else if (tag == MKTAG('n', 'a', 'm', 'e'))
3906  p = &key;
3907  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3908  avio_skip(pb, 4);
3909  len -= 4;
3910  p = &val;
3911  } else
3912  break;
3913 
3914  *p = av_malloc(len + 1);
3915  if (!*p)
3916  break;
3917  ret = ffio_read_size(pb, *p, len);
3918  if (ret < 0) {
3919  av_freep(p);
3920  break;
3921  }
3922  (*p)[len] = 0;
3923  }
3924 
3925  if (mean && key && val) {
3926  if (strcmp(key, "iTunSMPB") == 0) {
3927  int priming, remainder, samples;
3928  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3929  if(priming>0 && priming<16384)
3930  sc->start_pad = priming;
3931  }
3932  }
3933  if (strcmp(key, "cdec") != 0) {
3934  av_dict_set(&c->fc->metadata, key, val,
3935  AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
3936  key = val = NULL;
3937  }
3938  } else {
3939  av_log(c->fc, AV_LOG_VERBOSE,
3940  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3941  }
3942 
3943  avio_seek(pb, end, SEEK_SET);
3944  av_freep(&key);
3945  av_freep(&val);
3946  av_freep(&mean);
3947  return ret;
3948 }
3949 
3950 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3951 {
3952  while (atom.size > 8) {
3953  uint32_t tag = avio_rl32(pb);
3954  atom.size -= 4;
3955  if (tag == MKTAG('h','d','l','r')) {
3956  avio_seek(pb, -8, SEEK_CUR);
3957  atom.size += 8;
3958  return mov_read_default(c, pb, atom);
3959  }
3960  }
3961  return 0;
3962 }
3963 
3964 // return 1 when matrix is identity, 0 otherwise
3965 #define IS_MATRIX_IDENT(matrix) \
3966  ( (matrix)[0][0] == (1 << 16) && \
3967  (matrix)[1][1] == (1 << 16) && \
3968  (matrix)[2][2] == (1 << 30) && \
3969  !(matrix)[0][1] && !(matrix)[0][2] && \
3970  !(matrix)[1][0] && !(matrix)[1][2] && \
3971  !(matrix)[2][0] && !(matrix)[2][1])
3972 
3973 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3974 {
3975  int i, j, e;
3976  int width;
3977  int height;
3978  int display_matrix[3][3];
3979  int res_display_matrix[3][3] = { { 0 } };
3980  AVStream *st;
3981  MOVStreamContext *sc;
3982  int version;
3983  int flags;
3984 
3985  if (c->fc->nb_streams < 1)
3986  return 0;
3987  st = c->fc->streams[c->fc->nb_streams-1];
3988  sc = st->priv_data;
3989 
3990  version = avio_r8(pb);
3991  flags = avio_rb24(pb);
3992  st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
3993 
3994  if (version == 1) {
3995  avio_rb64(pb);
3996  avio_rb64(pb);
3997  } else {
3998  avio_rb32(pb); /* creation time */
3999  avio_rb32(pb); /* modification time */
4000  }
4001  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
4002  avio_rb32(pb); /* reserved */
4003 
4004  /* highlevel (considering edits) duration in movie timebase */
4005  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
4006  avio_rb32(pb); /* reserved */
4007  avio_rb32(pb); /* reserved */
4008 
4009  avio_rb16(pb); /* layer */
4010  avio_rb16(pb); /* alternate group */
4011  avio_rb16(pb); /* volume */
4012  avio_rb16(pb); /* reserved */
4013 
4014  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
4015  // they're kept in fixed point format through all calculations
4016  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
4017  // side data, but the scale factor is not needed to calculate aspect ratio
4018  for (i = 0; i < 3; i++) {
4019  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
4020  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
4021  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
4022  }
4023 
4024  width = avio_rb32(pb); // 16.16 fixed point track width
4025  height = avio_rb32(pb); // 16.16 fixed point track height
4026  sc->width = width >> 16;
4027  sc->height = height >> 16;
4028 
4029  // apply the moov display matrix (after the tkhd one)
4030  for (i = 0; i < 3; i++) {
4031  const int sh[3] = { 16, 16, 30 };
4032  for (j = 0; j < 3; j++) {
4033  for (e = 0; e < 3; e++) {
4034  res_display_matrix[i][j] +=
4035  ((int64_t) display_matrix[i][e] *
4036  c->movie_display_matrix[e][j]) >> sh[e];
4037  }
4038  }
4039  }
4040 
4041  // save the matrix when it is not the default identity
4042  if (!IS_MATRIX_IDENT(res_display_matrix)) {
4043  double rotate;
4044 
4045  av_freep(&sc->display_matrix);
4046  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
4047  if (!sc->display_matrix)
4048  return AVERROR(ENOMEM);
4049 
4050  for (i = 0; i < 3; i++)
4051  for (j = 0; j < 3; j++)
4052  sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
4053 
4054 #if FF_API_OLD_ROTATE_API
4055  rotate = av_display_rotation_get(sc->display_matrix);
4056  if (!isnan(rotate)) {
4057  char rotate_buf[64];
4058  rotate = -rotate;
4059  if (rotate < 0) // for backward compatibility
4060  rotate += 360;
4061  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
4062  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
4063  }
4064 #endif
4065  }
4066 
4067  // transform the display width/height according to the matrix
4068  // to keep the same scale, use [width height 1<<16]
4069  if (width && height && sc->display_matrix) {
4070  double disp_transform[2];
4071 
4072  for (i = 0; i < 2; i++)
4073  disp_transform[i] = hypot(sc->display_matrix[0 + i],
4074  sc->display_matrix[3 + i]);
4075 
4076  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
4077  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
4078  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
4079  st->sample_aspect_ratio = av_d2q(
4080  disp_transform[0] / disp_transform[1],
4081  INT_MAX);
4082  }
4083  return 0;
4084 }
4085 
4086 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4087 {
4088  MOVFragment *frag = &c->fragment;
4089  MOVTrackExt *trex = NULL;
4090  MOVFragmentIndex* index = NULL;
4091  int flags, track_id, i, found = 0;
4092 
4093  avio_r8(pb); /* version */
4094  flags = avio_rb24(pb);
4095 
4096  track_id = avio_rb32(pb);
4097  if (!track_id)
4098  return AVERROR_INVALIDDATA;
4099  frag->track_id = track_id;
4100  for (i = 0; i < c->trex_count; i++)
4101  if (c->trex_data[i].track_id == frag->track_id) {
4102  trex = &c->trex_data[i];
4103  break;
4104  }
4105  if (!trex) {
4106  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
4107  return AVERROR_INVALIDDATA;
4108  }
4109 
4110  frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
4111  avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
4112  frag->moof_offset : frag->implicit_offset;
4113  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
4114 
4115  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
4116  avio_rb32(pb) : trex->duration;
4117  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
4118  avio_rb32(pb) : trex->size;
4119  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
4120  avio_rb32(pb) : trex->flags;
4121  frag->time = AV_NOPTS_VALUE;
4122  for (i = 0; i < c->fragment_index_count; i++) {
4123  int j;
4124  MOVFragmentIndex* candidate = c->fragment_index_data[i];
4125  if (candidate->track_id == frag->track_id) {
4126  av_log(c->fc, AV_LOG_DEBUG,
4127  "found fragment index for track %u\n", frag->track_id);
4128  index = candidate;
4129  for (j = index->current_item; j < index->item_count; j++) {
4130  if (frag->implicit_offset == index->items[j].moof_offset) {
4131  av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
4132  "for track %u and moof_offset %"PRId64"\n",
4133  frag->track_id, index->items[j].moof_offset);
4134  frag->time = index->items[j].time;
4135  index->current_item = j + 1;
4136  found = 1;
4137  break;
4138  }
4139  }
4140  if (found)
4141  break;
4142  }
4143  }
4144  if (index && !found) {
4145  av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
4146  "it doesn't have an (in-order) entry for moof_offset "
4147  "%"PRId64"\n", frag->track_id, frag->implicit_offset);
4148  }
4149  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
4150  return 0;
4151 }
4152 
4153 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4154 {
4155  unsigned i, num;
4156  void *new_tracks;
4157 
4158  num = atom.size / 4;
4159  if (!(new_tracks = av_malloc_array(num, sizeof(int))))
4160  return AVERROR(ENOMEM);
4161 
4162  av_free(c->chapter_tracks);
4163  c->chapter_tracks = new_tracks;
4164  c->nb_chapter_tracks = num;
4165 
4166  for (i = 0; i < num && !pb->eof_reached; i++)
4167  c->chapter_tracks[i] = avio_rb32(pb);
4168 
4169  return 0;
4170 }
4171 
4172 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4173 {
4174  MOVTrackExt *trex;
4175  int err;
4176 
4177  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
4178  return AVERROR_INVALIDDATA;
4179  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
4180  sizeof(*c->trex_data))) < 0) {
4181  c->trex_count = 0;
4182  return err;
4183  }
4184 
4185  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
4186 
4187  trex = &c->trex_data[c->trex_count++];
4188  avio_r8(pb); /* version */
4189  avio_rb24(pb); /* flags */
4190  trex->track_id = avio_rb32(pb);
4191  trex->stsd_id = avio_rb32(pb);
4192  trex->duration = avio_rb32(pb);
4193  trex->size = avio_rb32(pb);
4194  trex->flags = avio_rb32(pb);
4195  return 0;
4196 }
4197 
4198 static int mov_read_tfdt(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4199 {
4200  MOVFragment *frag = &c->fragment;
4201  AVStream *st = NULL;
4202  MOVStreamContext *sc;
4203  int version, i;
4204 
4205  for (i = 0; i < c->fc->nb_streams; i++) {
4206  if (c->fc->streams[i]->id == frag->track_id) {
4207  st = c->fc->streams[i];
4208  break;
4209  }
4210  }
4211  if (!st) {
4212  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4213  return AVERROR_INVALIDDATA;
4214  }
4215  sc = st->priv_data;
4216  if (sc->pseudo_stream_id + 1 != frag->stsd_id)
4217  return 0;
4218  version = avio_r8(pb);
4219  avio_rb24(pb); /* flags */
4220  if (version) {
4221  sc->track_end = avio_rb64(pb);
4222  } else {
4223  sc->track_end = avio_rb32(pb);
4224  }
4225  return 0;
4226 }
4227 
4228 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4229 {
4230  MOVFragment *frag = &c->fragment;
4231  AVStream *st = NULL;
4232  MOVStreamContext *sc;
4233  MOVStts *ctts_data;
4234  uint64_t offset;
4235  int64_t dts;
4236  int data_offset = 0;
4237  unsigned entries, first_sample_flags = frag->flags;
4238  int flags, distance, i, err;
4239 
4240  for (i = 0; i < c->fc->nb_streams; i++) {
4241  if (c->fc->streams[i]->id == frag->track_id) {
4242  st = c->fc->streams[i];
4243  break;
4244  }
4245  }
4246  if (!st) {
4247  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4248  return AVERROR_INVALIDDATA;
4249  }
4250  sc = st->priv_data;
4251  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4252  return 0;
4253  avio_r8(pb); /* version */
4254  flags = avio_rb24(pb);
4255  entries = avio_rb32(pb);
4256  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %u\n", flags, entries);
4257 
4258  /* Always assume the presence of composition time offsets.
4259  * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
4260  * 1) in the initial movie, there are no samples.
4261  * 2) in the first movie fragment, there is only one sample without composition time offset.
4262  * 3) in the subsequent movie fragments, there are samples with composition time offset. */
4263  if (!sc->ctts_count && sc->sample_count)
4264  {
4265  /* Complement ctts table if moov atom doesn't have ctts atom. */
4266  ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
4267  if (!ctts_data)
4268  return AVERROR(ENOMEM);
4269  sc->ctts_data = ctts_data;
4270  sc->ctts_data[sc->ctts_count].count = sc->sample_count;
4271  sc->ctts_data[sc->ctts_count].duration = 0;
4272  sc->ctts_count++;
4273  }
4274  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
4275  return AVERROR_INVALIDDATA;
4276  if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
4277  sizeof(*sc->ctts_data))) < 0) {
4278  sc->ctts_count = 0;
4279  return err;
4280  }
4281  if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
4282  if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
4283  dts = sc->track_end - sc->time_offset;
4284  offset = frag->base_data_offset + data_offset;
4285  distance = 0;
4286  av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
4287  for (i = 0; i < entries && !pb->eof_reached; i++) {
4288  unsigned sample_size = frag->size;
4289  int sample_flags = i ? frag->flags : first_sample_flags;
4290  unsigned sample_duration = frag->duration;
4291  int keyframe = 0;
4292 
4293  if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
4294  if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
4295  if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
4296  sc->ctts_data[sc->ctts_count].count = 1;
4297  sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
4298  avio_rb32(pb) : 0;
4299  mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
4300  if (frag->time != AV_NOPTS_VALUE) {
4301  if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
4302  int64_t pts = frag->time;
4303  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4304  " sc->dts_shift %d ctts.duration %d"
4305  " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
4306  sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
4307  sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
4308  dts = pts - sc->dts_shift;
4309  if (flags & MOV_TRUN_SAMPLE_CTS) {
4310  dts -= sc->ctts_data[sc->ctts_count].duration;
4311  } else {
4312  dts -= sc->time_offset;
4313  }
4314  av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
4315  } else {
4316  dts = frag->time - sc->time_offset;
4317  av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4318  ", using it for dts\n", dts);
4319  }
4320  frag->time = AV_NOPTS_VALUE;
4321  }
4322  sc->ctts_count++;
4323  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
4324  keyframe = 1;
4325  else
4326  keyframe =
4327  !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
4328  MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
4329  if (keyframe)
4330  distance = 0;
4331  err = av_add_index_entry(st, offset, dts, sample_size, distance,
4332  keyframe ? AVINDEX_KEYFRAME : 0);
4333  if (err < 0) {
4334  av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
4335  }
4336  av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
4337  "size %u, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
4338  offset, dts, sample_size, distance, keyframe);
4339  distance++;
4340  dts += sample_duration;
4341  offset += sample_size;
4342  sc->data_size += sample_size;
4343  sc->duration_for_fps += sample_duration;
4344  sc->nb_frames_for_fps ++;
4345  }
4346 
4347  if (pb->eof_reached)
4348  return AVERROR_EOF;
4349 
4350  frag->implicit_offset = offset;
4351 
4352  sc->track_end = dts + sc->time_offset;
4353  if (st->duration < sc->track_end)
4354  st->duration = sc->track_end;
4355 
4356  return 0;
4357 }
4358 
4359 static int mov_read_sidx(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4360 {
4361  int64_t offset = avio_tell(pb) + atom.size, pts;
4362  uint8_t version;
4363  unsigned i, track_id;
4364  AVStream *st = NULL;
4365  AVStream *ref_st = NULL;
4366  MOVStreamContext *sc, *ref_sc = NULL;
4367  MOVFragmentIndex *index = NULL;
4368  MOVFragmentIndex **tmp;
4369  AVRational timescale;
4370 
4371  version = avio_r8(pb);
4372  if (version > 1) {
4373  avpriv_request_sample(c->fc, "sidx version %u", version);
4374  return 0;
4375  }
4376 
4377  avio_rb24(pb); // flags
4378 
4379  track_id = avio_rb32(pb); // Reference ID
4380  for (i = 0; i < c->fc->nb_streams; i++) {
4381  if (c->fc->streams[i]->id == track_id) {
4382  st = c->fc->streams[i];
4383  break;
4384  }
4385  }
4386  if (!st) {
4387  av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
4388  return 0;
4389  }
4390 
4391  sc = st->priv_data;
4392 
4393  timescale = av_make_q(1, avio_rb32(pb));
4394 
4395  if (timescale.den <= 0) {
4396  av_log(c->fc, AV_LOG_ERROR, "Invalid sidx timescale 1/%d\n", timescale.den);
4397  return AVERROR_INVALIDDATA;
4398  }
4399 
4400  if (version == 0) {
4401  pts = avio_rb32(pb);
4402  offset += avio_rb32(pb);
4403  } else {
4404  pts = avio_rb64(pb);
4405  offset += avio_rb64(pb);
4406  }
4407 
4408  avio_rb16(pb); // reserved
4409 
4410  index = av_mallocz(sizeof(MOVFragmentIndex));
4411  if (!index)
4412  return AVERROR(ENOMEM);
4413 
4414  index->track_id = track_id;
4415 
4416  index->item_count = avio_rb16(pb);
4417  index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
4418 
4419  if (!index->items) {
4420  av_freep(&index);
4421  return AVERROR(ENOMEM);
4422  }
4423 
4424  for (i = 0; i < index->item_count; i++) {
4425  uint32_t size = avio_rb32(pb);
4426  uint32_t duration = avio_rb32(pb);
4427  if (size & 0x80000000) {
4428  avpriv_request_sample(c->fc, "sidx reference_type 1");
4429  av_freep(&index->items);
4430  av_freep(&index);
4431  return AVERROR_PATCHWELCOME;
4432  }
4433  avio_rb32(pb); // sap_flags
4434  index->items[i].moof_offset = offset;
4435  index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
4436  offset += size;
4437  pts += duration;
4438  }
4439 
4440  st->duration = sc->track_end = pts;
4441 
4442  tmp = av_realloc_array(c->fragment_index_data,
4443  c->fragment_index_count + 1,
4444  sizeof(MOVFragmentIndex*));
4445  if (!tmp) {
4446  av_freep(&index->items);
4447  av_freep(&index);
4448  return AVERROR(ENOMEM);
4449  }
4450 
4451  c->fragment_index_data = tmp;
4452  c->fragment_index_data[c->fragment_index_count++] = index;
4453  sc->has_sidx = 1;
4454 
4455  if (offset == avio_size(pb)) {
4456  for (i = 0; i < c->fc->nb_streams; i++) {
4457  if (c->fc->streams[i]->id == c->fragment_index_data[0]->track_id) {
4458  ref_st = c->fc->streams[i];
4459  ref_sc = ref_st->priv_data;
4460  break;
4461  }
4462  }
4463  for (i = 0; i < c->fc->nb_streams; i++) {
4464  st = c->fc->streams[i];
4465  sc = st->priv_data;
4466  if (!sc->has_sidx) {
4467  st->duration = sc->track_end = av_rescale(ref_st->duration, sc->time_scale, ref_sc->time_scale);
4468  }
4469  }
4470 
4471  c->fragment_index_complete = 1;
4472  }
4473 
4474  return 0;
4475 }
4476 
4477 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
4478 /* like the files created with Adobe Premiere 5.0, for samples see */
4479 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
4480 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4481 {
4482  int err;
4483 
4484  if (atom.size < 8)
4485  return 0; /* continue */
4486  if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
4487  avio_skip(pb, atom.size - 4);
4488  return 0;
4489  }
4490  atom.type = avio_rl32(pb);
4491  atom.size -= 8;
4492  if (atom.type != MKTAG('m','d','a','t')) {
4493  avio_skip(pb, atom.size);
4494  return 0;
4495  }
4496  err = mov_read_mdat(c, pb, atom);
4497  return err;
4498 }
4499 
4500 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4501 {
4502 #if CONFIG_ZLIB
4503  AVIOContext ctx;
4504  uint8_t *cmov_data;
4505  uint8_t *moov_data; /* uncompressed data */
4506  long cmov_len, moov_len;
4507  int ret = -1;
4508 
4509  avio_rb32(pb); /* dcom atom */
4510  if (avio_rl32(pb) != MKTAG('d','c','o','m'))
4511  return AVERROR_INVALIDDATA;
4512  if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
4513  av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
4514  return AVERROR_INVALIDDATA;
4515  }
4516  avio_rb32(pb); /* cmvd atom */
4517  if (avio_rl32(pb) != MKTAG('c','m','v','d'))
4518  return AVERROR_INVALIDDATA;
4519  moov_len = avio_rb32(pb); /* uncompressed size */
4520  cmov_len = atom.size - 6 * 4;
4521 
4522  cmov_data = av_malloc(cmov_len);
4523  if (!cmov_data)
4524  return AVERROR(ENOMEM);
4525  moov_data = av_malloc(moov_len);
4526  if (!moov_data) {
4527  av_free(cmov_data);
4528  return AVERROR(ENOMEM);
4529  }
4530  ret = ffio_read_size(pb, cmov_data, cmov_len);
4531  if (ret < 0)
4532  goto free_and_return;
4533 
4534  if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
4535  goto free_and_return;
4536  if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
4537  goto free_and_return;
4538  ctx.seekable = AVIO_SEEKABLE_NORMAL;
4539  atom.type = MKTAG('m','o','o','v');
4540  atom.size = moov_len;
4541  ret = mov_read_default(c, &ctx, atom);
4542 free_and_return:
4543  av_free(moov_data);
4544  av_free(cmov_data);
4545  return ret;
4546 #else
4547  av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
4548  return AVERROR(ENOSYS);
4549 #endif
4550 }
4551 
4552 /* edit list atom */
4553 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4554 {
4555  MOVStreamContext *sc;
4556  int i, edit_count, version;
4557 
4558  if (c->fc->nb_streams < 1 || c->ignore_editlist)
4559  return 0;
4560  sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
4561 
4562  version = avio_r8(pb); /* version */
4563  avio_rb24(pb); /* flags */
4564  edit_count = avio_rb32(pb); /* entries */
4565 
4566  if (!edit_count)
4567  return 0;
4568  if (sc->elst_data)
4569  av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
4570  av_free(sc->elst_data);
4571  sc->elst_count = 0;
4572  sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
4573  if (!sc->elst_data)
4574  return AVERROR(ENOMEM);
4575 
4576  av_log(c->fc, AV_LOG_TRACE, "track[%u].edit_count = %i\n", c->fc->nb_streams - 1, edit_count);
4577  for (i = 0; i < edit_count && !pb->eof_reached; i++) {
4578  MOVElst *e = &sc->elst_data[i];
4579 
4580  if (version == 1) {
4581  e->duration = avio_rb64(pb);
4582  e->time = avio_rb64(pb);
4583  } else {
4584  e->duration = avio_rb32(pb); /* segment duration */
4585  e->time = (int32_t)avio_rb32(pb); /* media time */
4586  }
4587  e->rate = avio_rb32(pb) / 65536.0;
4588  av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
4589  e->duration, e->time, e->rate);
4590 
4591  if (e->time < 0 && e->time != -1 &&
4592  c->fc->strict_std_compliance >= FF_COMPLIANCE_STRICT) {
4593  av_log(c->fc, AV_LOG_ERROR, "Track %d, edit %d: Invalid edit list media time=%"PRId64"\n",
4594  c->fc->nb_streams-1, i, e->time);
4595  return AVERROR_INVALIDDATA;
4596  }
4597  }
4598  sc->elst_count = i;
4599 
4600  return 0;
4601 }
4602 
4603 static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4604 {
4605  MOVStreamContext *sc;
4606 
4607  if (c->fc->nb_streams < 1)
4608  return AVERROR_INVALIDDATA;
4609  sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4610  sc->timecode_track = avio_rb32(pb);
4611  return 0;
4612 }
4613 
4614 static int mov_read_st3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4615 {
4616  AVStream *st;
4617  MOVStreamContext *sc;
4618  enum AVStereo3DType type;
4619  int mode;
4620 
4621  if (c->fc->nb_streams < 1)
4622  return 0;
4623 
4624  st = c->fc->streams[c->fc->nb_streams - 1];
4625  sc = st->priv_data;
4626 
4627  if (atom.size < 5) {
4628  av_log(c->fc, AV_LOG_ERROR, "Empty stereoscopic video box\n");
4629  return AVERROR_INVALIDDATA;
4630  }
4631  avio_skip(pb, 4); /* version + flags */
4632 
4633  mode = avio_r8(pb);
4634  switch (mode) {
4635  case 0:
4636  type = AV_STEREO3D_2D;
4637  break;
4638  case 1:
4639  type = AV_STEREO3D_TOPBOTTOM;
4640  break;
4641  case 2:
4642  type = AV_STEREO3D_SIDEBYSIDE;
4643  break;
4644  default:
4645  av_log(c->fc, AV_LOG_WARNING, "Unknown st3d mode value %d\n", mode);
4646  return 0;
4647  }
4648 
4649  sc->stereo3d = av_stereo3d_alloc();
4650  if (!sc->stereo3d)
4651  return AVERROR(ENOMEM);
4652 
4653  sc->stereo3d->type = type;
4654  return 0;
4655 }
4656 
4657 static int mov_read_sv3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4658 {
4659  AVStream *st;
4660  MOVStreamContext *sc;
4661  int size, layout;
4662  int32_t yaw, pitch, roll;
4663  uint32_t l = 0, t = 0, r = 0, b = 0;
4664  uint32_t tag, padding = 0;
4665  enum AVSphericalProjection projection;
4666 
4667  if (c->fc->nb_streams < 1)
4668  return 0;
4669 
4670  st = c->fc->streams[c->fc->nb_streams - 1];
4671  sc = st->priv_data;
4672 
4673  if (atom.size < 8) {
4674  av_log(c->fc, AV_LOG_ERROR, "Empty spherical video box\n");
4675  return AVERROR_INVALIDDATA;
4676  }
4677 
4678  size = avio_rb32(pb);
4679  if (size <= 12 || size > atom.size)
4680  return AVERROR_INVALIDDATA;
4681 
4682  tag = avio_rl32(pb);
4683  if (tag != MKTAG('s','v','h','d')) {
4684  av_log(c->fc, AV_LOG_ERROR, "Missing spherical video header\n");
4685  return 0;
4686  }
4687  avio_skip(pb, 4); /* version + flags */
4688  avio_skip(pb, size - 12); /* metadata_source */
4689 
4690  size = avio_rb32(pb);
4691  if (size > atom.size)
4692  return AVERROR_INVALIDDATA;
4693 
4694  tag = avio_rl32(pb);
4695  if (tag != MKTAG('p','r','o','j')) {
4696  av_log(c->fc, AV_LOG_ERROR, "Missing projection box\n");
4697  return 0;
4698  }
4699 
4700  size = avio_rb32(pb);
4701  if (size > atom.size)
4702  return AVERROR_INVALIDDATA;
4703 
4704  tag = avio_rl32(pb);
4705  if (tag != MKTAG('p','r','h','d')) {
4706  av_log(c->fc, AV_LOG_ERROR, "Missing projection header box\n");
4707  return 0;
4708  }
4709