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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 static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
78  int count, int duration);
79 
80 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
81  unsigned len, const char *key)
82 {
83  char buf[16];
84 
85  short current, total = 0;
86  avio_rb16(pb); // unknown
87  current = avio_rb16(pb);
88  if (len >= 6)
89  total = avio_rb16(pb);
90  if (!total)
91  snprintf(buf, sizeof(buf), "%d", current);
92  else
93  snprintf(buf, sizeof(buf), "%d/%d", current, total);
94  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
95  av_dict_set(&c->fc->metadata, key, buf, 0);
96 
97  return 0;
98 }
99 
100 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
101  unsigned len, const char *key)
102 {
103  /* bypass padding bytes */
104  avio_r8(pb);
105  avio_r8(pb);
106  avio_r8(pb);
107 
108  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
109  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
110 
111  return 0;
112 }
113 
114 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
115  unsigned len, const char *key)
116 {
117  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
118  av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
119 
120  return 0;
121 }
122 
123 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
124  unsigned len, const char *key)
125 {
126  short genre;
127 
128  avio_r8(pb); // unknown
129 
130  genre = avio_r8(pb);
131  if (genre < 1 || genre > ID3v1_GENRE_MAX)
132  return 0;
133  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
134  av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
135 
136  return 0;
137 }
138 
139 static const uint32_t mac_to_unicode[128] = {
140  0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
141  0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
142  0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
143  0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
144  0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
145  0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
146  0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
147  0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
148  0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
149  0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
150  0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
151  0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
152  0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
153  0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
154  0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
155  0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
156 };
157 
158 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
159  char *dst, int dstlen)
160 {
161  char *p = dst;
162  char *end = dst+dstlen-1;
163  int i;
164 
165  for (i = 0; i < len; i++) {
166  uint8_t t, c = avio_r8(pb);
167 
168  if (p >= end)
169  continue;
170 
171  if (c < 0x80)
172  *p++ = c;
173  else if (p < end)
174  PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
175  }
176  *p = 0;
177  return p - dst;
178 }
179 
180 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
181 {
182  AVPacket pkt;
183  AVStream *st;
184  MOVStreamContext *sc;
185  enum AVCodecID id;
186  int ret;
187 
188  switch (type) {
189  case 0xd: id = AV_CODEC_ID_MJPEG; break;
190  case 0xe: id = AV_CODEC_ID_PNG; break;
191  case 0x1b: id = AV_CODEC_ID_BMP; break;
192  default:
193  av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
194  avio_skip(pb, len);
195  return 0;
196  }
197 
198  st = avformat_new_stream(c->fc, NULL);
199  if (!st)
200  return AVERROR(ENOMEM);
201  sc = av_mallocz(sizeof(*sc));
202  if (!sc)
203  return AVERROR(ENOMEM);
204  st->priv_data = sc;
205 
206  ret = av_get_packet(pb, &pkt, len);
207  if (ret < 0)
208  return ret;
209 
210  if (pkt.size >= 8 && id != AV_CODEC_ID_BMP) {
211  if (AV_RB64(pkt.data) == 0x89504e470d0a1a0a) {
212  id = AV_CODEC_ID_PNG;
213  } else {
214  id = AV_CODEC_ID_MJPEG;
215  }
216  }
217 
218  st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
219 
220  st->attached_pic = pkt;
221  st->attached_pic.stream_index = st->index;
222  st->attached_pic.flags |= AV_PKT_FLAG_KEY;
223 
224  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
225  st->codecpar->codec_id = id;
226 
227  return 0;
228 }
229 
230 // 3GPP TS 26.244
231 static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
232 {
233  char language[4] = { 0 };
234  char buf[200], place[100];
235  uint16_t langcode = 0;
236  double longitude, latitude, altitude;
237  const char *key = "location";
238 
239  if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
240  av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
241  return AVERROR_INVALIDDATA;
242  }
243 
244  avio_skip(pb, 4); // version+flags
245  langcode = avio_rb16(pb);
246  ff_mov_lang_to_iso639(langcode, language);
247  len -= 6;
248 
249  len -= avio_get_str(pb, len, place, sizeof(place));
250  if (len < 1) {
251  av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
252  return AVERROR_INVALIDDATA;
253  }
254  avio_skip(pb, 1); // role
255  len -= 1;
256 
257  if (len < 12) {
258  av_log(c->fc, AV_LOG_ERROR,
259  "loci too short (%u bytes left, need at least %d)\n", len, 12);
260  return AVERROR_INVALIDDATA;
261  }
262  longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
263  latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
264  altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
265 
266  // Try to output in the same format as the ?xyz field
267  snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
268  if (altitude)
269  av_strlcatf(buf, sizeof(buf), "%+f", altitude);
270  av_strlcatf(buf, sizeof(buf), "/%s", place);
271 
272  if (*language && strcmp(language, "und")) {
273  char key2[16];
274  snprintf(key2, sizeof(key2), "%s-%s", key, language);
275  av_dict_set(&c->fc->metadata, key2, buf, 0);
276  }
277  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
278  return av_dict_set(&c->fc->metadata, key, buf, 0);
279 }
280 
281 static int mov_metadata_hmmt(MOVContext *c, AVIOContext *pb, unsigned len)
282 {
283  int i, n_hmmt;
284 
285  if (len < 2)
286  return 0;
287  if (c->ignore_chapters)
288  return 0;
289 
290  n_hmmt = avio_rb32(pb);
291  for (i = 0; i < n_hmmt && !pb->eof_reached; i++) {
292  int moment_time = avio_rb32(pb);
293  avpriv_new_chapter(c->fc, i, av_make_q(1, 1000), moment_time, AV_NOPTS_VALUE, NULL);
294  }
295  return 0;
296 }
297 
298 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
299 {
300  char tmp_key[5];
301  char key2[32], language[4] = {0};
302  char *str = NULL;
303  const char *key = NULL;
304  uint16_t langcode = 0;
305  uint32_t data_type = 0, str_size, str_size_alloc;
306  int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
307  int raw = 0;
308  int num = 0;
309 
310  switch (atom.type) {
311  case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
312  case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
313  case MKTAG( 'X','M','P','_'):
314  if (c->export_xmp) { key = "xmp"; raw = 1; } break;
315  case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
316  case MKTAG( 'a','k','I','D'): key = "account_type";
317  parse = mov_metadata_int8_no_padding; break;
318  case MKTAG( 'a','p','I','D'): key = "account_id"; break;
319  case MKTAG( 'c','a','t','g'): key = "category"; break;
320  case MKTAG( 'c','p','i','l'): key = "compilation";
321  parse = mov_metadata_int8_no_padding; break;
322  case MKTAG( 'c','p','r','t'): key = "copyright"; break;
323  case MKTAG( 'd','e','s','c'): key = "description"; break;
324  case MKTAG( 'd','i','s','k'): key = "disc";
325  parse = mov_metadata_track_or_disc_number; break;
326  case MKTAG( 'e','g','i','d'): key = "episode_uid";
327  parse = mov_metadata_int8_no_padding; break;
328  case MKTAG( 'F','I','R','M'): key = "firmware"; raw = 1; break;
329  case MKTAG( 'g','n','r','e'): key = "genre";
330  parse = mov_metadata_gnre; break;
331  case MKTAG( 'h','d','v','d'): key = "hd_video";
332  parse = mov_metadata_int8_no_padding; break;
333  case MKTAG( 'H','M','M','T'):
334  return mov_metadata_hmmt(c, pb, atom.size);
335  case MKTAG( 'k','e','y','w'): key = "keywords"; break;
336  case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
337  case MKTAG( 'l','o','c','i'):
338  return mov_metadata_loci(c, pb, atom.size);
339  case MKTAG( 'm','a','n','u'): key = "make"; break;
340  case MKTAG( 'm','o','d','l'): key = "model"; break;
341  case MKTAG( 'p','c','s','t'): key = "podcast";
342  parse = mov_metadata_int8_no_padding; break;
343  case MKTAG( 'p','g','a','p'): key = "gapless_playback";
344  parse = mov_metadata_int8_no_padding; break;
345  case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
346  case MKTAG( 'r','t','n','g'): key = "rating";
347  parse = mov_metadata_int8_no_padding; break;
348  case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
349  case MKTAG( 's','o','a','l'): key = "sort_album"; break;
350  case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
351  case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
352  case MKTAG( 's','o','n','m'): key = "sort_name"; break;
353  case MKTAG( 's','o','s','n'): key = "sort_show"; break;
354  case MKTAG( 's','t','i','k'): key = "media_type";
355  parse = mov_metadata_int8_no_padding; break;
356  case MKTAG( 't','r','k','n'): key = "track";
357  parse = mov_metadata_track_or_disc_number; break;
358  case MKTAG( 't','v','e','n'): key = "episode_id"; break;
359  case MKTAG( 't','v','e','s'): key = "episode_sort";
360  parse = mov_metadata_int8_bypass_padding; break;
361  case MKTAG( 't','v','n','n'): key = "network"; break;
362  case MKTAG( 't','v','s','h'): key = "show"; break;
363  case MKTAG( 't','v','s','n'): key = "season_number";
364  parse = mov_metadata_int8_bypass_padding; break;
365  case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
366  case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
367  case MKTAG(0xa9,'a','l','b'): key = "album"; break;
368  case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
369  case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
370  case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
371  case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
372  case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
373  case MKTAG(0xa9,'d','a','y'): key = "date"; break;
374  case MKTAG(0xa9,'d','i','r'): key = "director"; break;
375  case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
376  case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
377  case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
378  case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
379  case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
380  case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
381  case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
382  case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
383  case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
384  case MKTAG(0xa9,'m','a','k'): key = "make"; break;
385  case MKTAG(0xa9,'m','o','d'): key = "model"; break;
386  case MKTAG(0xa9,'n','a','m'): key = "title"; break;
387  case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
388  case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
389  case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
390  case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
391  case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
392  case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
393  case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
394  case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
395  case MKTAG(0xa9,'t','r','k'): key = "track"; break;
396  case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
397  case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
398  case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
399  case MKTAG(0xa9,'x','y','z'): key = "location"; break;
400  }
401 retry:
402  if (c->itunes_metadata && atom.size > 8) {
403  int data_size = avio_rb32(pb);
404  int tag = avio_rl32(pb);
405  if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
406  data_type = avio_rb32(pb); // type
407  avio_rb32(pb); // unknown
408  str_size = data_size - 16;
409  atom.size -= 16;
410 
411  if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
412  int ret = mov_read_covr(c, pb, data_type, str_size);
413  if (ret < 0) {
414  av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
415  return ret;
416  }
417  atom.size -= str_size;
418  if (atom.size > 8)
419  goto retry;
420  return ret;
421  } else if (!key && c->found_hdlr_mdta && c->meta_keys) {
422  uint32_t index = AV_RB32(&atom.type);
423  if (index < c->meta_keys_count && index > 0) {
424  key = c->meta_keys[index];
425  } else {
426  av_log(c->fc, AV_LOG_WARNING,
427  "The index of 'data' is out of range: %"PRId32" < 1 or >= %d.\n",
428  index, c->meta_keys_count);
429  }
430  }
431  } else return 0;
432  } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
433  str_size = avio_rb16(pb); // string length
434  if (str_size > atom.size) {
435  raw = 1;
436  avio_seek(pb, -2, SEEK_CUR);
437  av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
438  goto retry;
439  }
440  langcode = avio_rb16(pb);
441  ff_mov_lang_to_iso639(langcode, language);
442  atom.size -= 4;
443  } else
444  str_size = atom.size;
445 
446  if (c->export_all && !key) {
447  snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
448  key = tmp_key;
449  }
450 
451  if (!key)
452  return 0;
453  if (atom.size < 0 || str_size >= INT_MAX/2)
454  return AVERROR_INVALIDDATA;
455 
456  // Allocates enough space if data_type is a int32 or float32 number, otherwise
457  // worst-case requirement for output string in case of utf8 coded input
458  num = (data_type >= 21 && data_type <= 23);
459  str_size_alloc = (num ? 512 : (raw ? str_size : str_size * 2)) + 1;
460  str = av_mallocz(str_size_alloc);
461  if (!str)
462  return AVERROR(ENOMEM);
463 
464  if (parse)
465  parse(c, pb, str_size, key);
466  else {
467  if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
468  mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
469  } else if (data_type == 21) { // BE signed integer, variable size
470  int val = 0;
471  if (str_size == 1)
472  val = (int8_t)avio_r8(pb);
473  else if (str_size == 2)
474  val = (int16_t)avio_rb16(pb);
475  else if (str_size == 3)
476  val = ((int32_t)(avio_rb24(pb)<<8))>>8;
477  else if (str_size == 4)
478  val = (int32_t)avio_rb32(pb);
479  if (snprintf(str, str_size_alloc, "%d", val) >= str_size_alloc) {
480  av_log(c->fc, AV_LOG_ERROR,
481  "Failed to store the number (%d) in string.\n", val);
482  av_free(str);
483  return AVERROR_INVALIDDATA;
484  }
485  } else if (data_type == 22) { // BE unsigned integer, variable size
486  unsigned int val = 0;
487  if (str_size == 1)
488  val = avio_r8(pb);
489  else if (str_size == 2)
490  val = avio_rb16(pb);
491  else if (str_size == 3)
492  val = avio_rb24(pb);
493  else if (str_size == 4)
494  val = avio_rb32(pb);
495  if (snprintf(str, str_size_alloc, "%u", val) >= str_size_alloc) {
496  av_log(c->fc, AV_LOG_ERROR,
497  "Failed to store the number (%u) in string.\n", val);
498  av_free(str);
499  return AVERROR_INVALIDDATA;
500  }
501  } else if (data_type == 23 && str_size >= 4) { // BE float32
502  float val = av_int2float(avio_rb32(pb));
503  if (snprintf(str, str_size_alloc, "%f", val) >= str_size_alloc) {
504  av_log(c->fc, AV_LOG_ERROR,
505  "Failed to store the float32 number (%f) in string.\n", val);
506  av_free(str);
507  return AVERROR_INVALIDDATA;
508  }
509  } else {
510  int ret = ffio_read_size(pb, str, str_size);
511  if (ret < 0) {
512  av_free(str);
513  return ret;
514  }
515  str[str_size] = 0;
516  }
517  c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
518  av_dict_set(&c->fc->metadata, key, str, 0);
519  if (*language && strcmp(language, "und")) {
520  snprintf(key2, sizeof(key2), "%s-%s", key, language);
521  av_dict_set(&c->fc->metadata, key2, str, 0);
522  }
523  if (!strcmp(key, "encoder")) {
524  int major, minor, micro;
525  if (sscanf(str, "HandBrake %d.%d.%d", &major, &minor, &micro) == 3) {
526  c->handbrake_version = 1000000*major + 1000*minor + micro;
527  }
528  }
529  }
530 
531  av_freep(&str);
532  return 0;
533 }
534 
535 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
536 {
537  int64_t start;
538  int i, nb_chapters, str_len, version;
539  char str[256+1];
540  int ret;
541 
542  if (c->ignore_chapters)
543  return 0;
544 
545  if ((atom.size -= 5) < 0)
546  return 0;
547 
548  version = avio_r8(pb);
549  avio_rb24(pb);
550  if (version)
551  avio_rb32(pb); // ???
552  nb_chapters = avio_r8(pb);
553 
554  for (i = 0; i < nb_chapters; i++) {
555  if (atom.size < 9)
556  return 0;
557 
558  start = avio_rb64(pb);
559  str_len = avio_r8(pb);
560 
561  if ((atom.size -= 9+str_len) < 0)
562  return 0;
563 
564  ret = ffio_read_size(pb, str, str_len);
565  if (ret < 0)
566  return ret;
567  str[str_len] = 0;
568  avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
569  }
570  return 0;
571 }
572 
573 #define MIN_DATA_ENTRY_BOX_SIZE 12
574 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
575 {
576  AVStream *st;
577  MOVStreamContext *sc;
578  int entries, i, j;
579 
580  if (c->fc->nb_streams < 1)
581  return 0;
582  st = c->fc->streams[c->fc->nb_streams-1];
583  sc = st->priv_data;
584 
585  avio_rb32(pb); // version + flags
586  entries = avio_rb32(pb);
587  if (!entries ||
588  entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
589  entries >= UINT_MAX / sizeof(*sc->drefs))
590  return AVERROR_INVALIDDATA;
591  sc->drefs_count = 0;
592  av_free(sc->drefs);
593  sc->drefs_count = 0;
594  sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
595  if (!sc->drefs)
596  return AVERROR(ENOMEM);
597  sc->drefs_count = entries;
598 
599  for (i = 0; i < entries; i++) {
600  MOVDref *dref = &sc->drefs[i];
601  uint32_t size = avio_rb32(pb);
602  int64_t next = avio_tell(pb) + size - 4;
603 
604  if (size < 12)
605  return AVERROR_INVALIDDATA;
606 
607  dref->type = avio_rl32(pb);
608  avio_rb32(pb); // version + flags
609 
610  if (dref->type == MKTAG('a','l','i','s') && size > 150) {
611  /* macintosh alias record */
612  uint16_t volume_len, len;
613  int16_t type;
614  int ret;
615 
616  avio_skip(pb, 10);
617 
618  volume_len = avio_r8(pb);
619  volume_len = FFMIN(volume_len, 27);
620  ret = ffio_read_size(pb, dref->volume, 27);
621  if (ret < 0)
622  return ret;
623  dref->volume[volume_len] = 0;
624  av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
625 
626  avio_skip(pb, 12);
627 
628  len = avio_r8(pb);
629  len = FFMIN(len, 63);
630  ret = ffio_read_size(pb, dref->filename, 63);
631  if (ret < 0)
632  return ret;
633  dref->filename[len] = 0;
634  av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
635 
636  avio_skip(pb, 16);
637 
638  /* read next level up_from_alias/down_to_target */
639  dref->nlvl_from = avio_rb16(pb);
640  dref->nlvl_to = avio_rb16(pb);
641  av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
642  dref->nlvl_from, dref->nlvl_to);
643 
644  avio_skip(pb, 16);
645 
646  for (type = 0; type != -1 && avio_tell(pb) < next; ) {
647  if(avio_feof(pb))
648  return AVERROR_EOF;
649  type = avio_rb16(pb);
650  len = avio_rb16(pb);
651  av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
652  if (len&1)
653  len += 1;
654  if (type == 2) { // absolute path
655  av_free(dref->path);
656  dref->path = av_mallocz(len+1);
657  if (!dref->path)
658  return AVERROR(ENOMEM);
659 
660  ret = ffio_read_size(pb, dref->path, len);
661  if (ret < 0) {
662  av_freep(&dref->path);
663  return ret;
664  }
665  if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
666  len -= volume_len;
667  memmove(dref->path, dref->path+volume_len, len);
668  dref->path[len] = 0;
669  }
670  // trim string of any ending zeros
671  for (j = len - 1; j >= 0; j--) {
672  if (dref->path[j] == 0)
673  len--;
674  else
675  break;
676  }
677  for (j = 0; j < len; j++)
678  if (dref->path[j] == ':' || dref->path[j] == 0)
679  dref->path[j] = '/';
680  av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
681  } else if (type == 0) { // directory name
682  av_free(dref->dir);
683  dref->dir = av_malloc(len+1);
684  if (!dref->dir)
685  return AVERROR(ENOMEM);
686 
687  ret = ffio_read_size(pb, dref->dir, len);
688  if (ret < 0) {
689  av_freep(&dref->dir);
690  return ret;
691  }
692  dref->dir[len] = 0;
693  for (j = 0; j < len; j++)
694  if (dref->dir[j] == ':')
695  dref->dir[j] = '/';
696  av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
697  } else
698  avio_skip(pb, len);
699  }
700  } else {
701  av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x%08"PRIx32" size %"PRIu32"\n",
702  dref->type, size);
703  entries--;
704  i--;
705  }
706  avio_seek(pb, next, SEEK_SET);
707  }
708  return 0;
709 }
710 
711 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
712 {
713  AVStream *st;
714  uint32_t type;
715  uint32_t ctype;
716  int64_t title_size;
717  char *title_str;
718  int ret;
719 
720  avio_r8(pb); /* version */
721  avio_rb24(pb); /* flags */
722 
723  /* component type */
724  ctype = avio_rl32(pb);
725  type = avio_rl32(pb); /* component subtype */
726 
727  av_log(c->fc, AV_LOG_TRACE, "ctype=%s\n", av_fourcc2str(ctype));
728  av_log(c->fc, AV_LOG_TRACE, "stype=%s\n", av_fourcc2str(type));
729 
730  if (c->trak_index < 0) { // meta not inside a trak
731  if (type == MKTAG('m','d','t','a')) {
732  c->found_hdlr_mdta = 1;
733  }
734  return 0;
735  }
736 
737  st = c->fc->streams[c->fc->nb_streams-1];
738 
739  if (type == MKTAG('v','i','d','e'))
740  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
741  else if (type == MKTAG('s','o','u','n'))
742  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
743  else if (type == MKTAG('m','1','a',' '))
744  st->codecpar->codec_id = AV_CODEC_ID_MP2;
745  else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
746  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
747 
748  avio_rb32(pb); /* component manufacture */
749  avio_rb32(pb); /* component flags */
750  avio_rb32(pb); /* component flags mask */
751 
752  title_size = atom.size - 24;
753  if (title_size > 0) {
754  if (title_size > FFMIN(INT_MAX, SIZE_MAX-1))
755  return AVERROR_INVALIDDATA;
756  title_str = av_malloc(title_size + 1); /* Add null terminator */
757  if (!title_str)
758  return AVERROR(ENOMEM);
759 
760  ret = ffio_read_size(pb, title_str, title_size);
761  if (ret < 0) {
762  av_freep(&title_str);
763  return ret;
764  }
765  title_str[title_size] = 0;
766  if (title_str[0]) {
767  int off = (!c->isom && title_str[0] == title_size - 1);
768  // flag added so as to not set stream handler name if already set from mdia->hdlr
769  av_dict_set(&st->metadata, "handler_name", title_str + off, AV_DICT_DONT_OVERWRITE);
770  }
771  av_freep(&title_str);
772  }
773 
774  return 0;
775 }
776 
777 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
778 {
779  return ff_mov_read_esds(c->fc, pb);
780 }
781 
782 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
783 {
784  AVStream *st;
785  enum AVAudioServiceType *ast;
786  int ac3info, acmod, lfeon, bsmod;
787 
788  if (c->fc->nb_streams < 1)
789  return 0;
790  st = c->fc->streams[c->fc->nb_streams-1];
791 
792  ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
793  sizeof(*ast));
794  if (!ast)
795  return AVERROR(ENOMEM);
796 
797  ac3info = avio_rb24(pb);
798  bsmod = (ac3info >> 14) & 0x7;
799  acmod = (ac3info >> 11) & 0x7;
800  lfeon = (ac3info >> 10) & 0x1;
801  st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
802  st->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
803  if (lfeon)
804  st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
805  *ast = bsmod;
806  if (st->codecpar->channels > 1 && bsmod == 0x7)
807  *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
808 
809 #if FF_API_LAVF_AVCTX
810  FF_DISABLE_DEPRECATION_WARNINGS
811  st->codec->audio_service_type = *ast;
812  FF_ENABLE_DEPRECATION_WARNINGS
813 #endif
814 
815  return 0;
816 }
817 
818 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
819 {
820  AVStream *st;
821  enum AVAudioServiceType *ast;
822  int eac3info, acmod, lfeon, bsmod;
823 
824  if (c->fc->nb_streams < 1)
825  return 0;
826  st = c->fc->streams[c->fc->nb_streams-1];
827 
828  ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
829  sizeof(*ast));
830  if (!ast)
831  return AVERROR(ENOMEM);
832 
833  /* No need to parse fields for additional independent substreams and its
834  * associated dependent substreams since libavcodec's E-AC-3 decoder
835  * does not support them yet. */
836  avio_rb16(pb); /* data_rate and num_ind_sub */
837  eac3info = avio_rb24(pb);
838  bsmod = (eac3info >> 12) & 0x1f;
839  acmod = (eac3info >> 9) & 0x7;
840  lfeon = (eac3info >> 8) & 0x1;
841  st->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
842  if (lfeon)
843  st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
844  st->codecpar->channels = av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
845  *ast = bsmod;
846  if (st->codecpar->channels > 1 && bsmod == 0x7)
847  *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
848 
849 #if FF_API_LAVF_AVCTX
850  FF_DISABLE_DEPRECATION_WARNINGS
851  st->codec->audio_service_type = *ast;
852  FF_ENABLE_DEPRECATION_WARNINGS
853 #endif
854 
855  return 0;
856 }
857 
858 static int mov_read_ddts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
859 {
860  const uint32_t ddts_size = 20;
861  AVStream *st = NULL;
862  uint8_t *buf = NULL;
863  uint32_t frame_duration_code = 0;
864  uint32_t channel_layout_code = 0;
865  GetBitContext gb;
866 
867  buf = av_malloc(ddts_size + AV_INPUT_BUFFER_PADDING_SIZE);
868  if (!buf) {
869  return AVERROR(ENOMEM);
870  }
871  if (avio_read(pb, buf, ddts_size) < ddts_size) {
872  av_free(buf);
873  return AVERROR_INVALIDDATA;
874  }
875 
876  init_get_bits(&gb, buf, 8*ddts_size);
877 
878  if (c->fc->nb_streams < 1) {
879  av_free(buf);
880  return 0;
881  }
882  st = c->fc->streams[c->fc->nb_streams-1];
883 
884  st->codecpar->sample_rate = get_bits_long(&gb, 32);
885  if (st->codecpar->sample_rate <= 0) {
886  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
887  av_free(buf);
888  return AVERROR_INVALIDDATA;
889  }
890  skip_bits_long(&gb, 32); /* max bitrate */
891  st->codecpar->bit_rate = get_bits_long(&gb, 32);
892  st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
893  frame_duration_code = get_bits(&gb, 2);
894  skip_bits(&gb, 30); /* various fields */
895  channel_layout_code = get_bits(&gb, 16);
896 
897  st->codecpar->frame_size =
898  (frame_duration_code == 0) ? 512 :
899  (frame_duration_code == 1) ? 1024 :
900  (frame_duration_code == 2) ? 2048 :
901  (frame_duration_code == 3) ? 4096 : 0;
902 
903  if (channel_layout_code > 0xff) {
904  av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
905  }
906  st->codecpar->channel_layout =
907  ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
908  ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
909  ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
910  ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
911  ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
912  ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
913 
914  st->codecpar->channels = av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
915  av_free(buf);
916 
917  return 0;
918 }
919 
920 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
921 {
922  AVStream *st;
923 
924  if (c->fc->nb_streams < 1)
925  return 0;
926  st = c->fc->streams[c->fc->nb_streams-1];
927 
928  if (atom.size < 16)
929  return 0;
930 
931  /* skip version and flags */
932  avio_skip(pb, 4);
933 
934  ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
935 
936  return 0;
937 }
938 
939 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
940 {
941  AVStream *st;
942  int ret;
943 
944  if (c->fc->nb_streams < 1)
945  return 0;
946  st = c->fc->streams[c->fc->nb_streams-1];
947 
948  if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
949  av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
950 
951  return ret;
952 }
953 
954 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
955 {
956  const int num = avio_rb32(pb);
957  const int den = avio_rb32(pb);
958  AVStream *st;
959 
960  if (c->fc->nb_streams < 1)
961  return 0;
962  st = c->fc->streams[c->fc->nb_streams-1];
963 
964  if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
965  (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
966  av_log(c->fc, AV_LOG_WARNING,
967  "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
968  st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
969  num, den);
970  } else if (den != 0) {
971  av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den,
972  num, den, 32767);
973  }
974  return 0;
975 }
976 
977 /* this atom contains actual media data */
978 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
979 {
980  if (atom.size == 0) /* wrong one (MP4) */
981  return 0;
982  c->found_mdat=1;
983  return 0; /* now go for moov */
984 }
985 
986 #define DRM_BLOB_SIZE 56
987 
988 static int mov_read_adrm(MOVContext *c, AVIOContext *pb, MOVAtom atom)
989 {
990  uint8_t intermediate_key[20];
991  uint8_t intermediate_iv[20];
992  uint8_t input[64];
993  uint8_t output[64];
994  uint8_t file_checksum[20];
995  uint8_t calculated_checksum[20];
996  struct AVSHA *sha;
997  int i;
998  int ret = 0;
999  uint8_t *activation_bytes = c->activation_bytes;
1000  uint8_t *fixed_key = c->audible_fixed_key;
1001 
1002  c->aax_mode = 1;
1003 
1004  sha = av_sha_alloc();
1005  if (!sha)
1006  return AVERROR(ENOMEM);
1007  c->aes_decrypt = av_aes_alloc();
1008  if (!c->aes_decrypt) {
1009  ret = AVERROR(ENOMEM);
1010  goto fail;
1011  }
1012 
1013  /* drm blob processing */
1014  avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
1015  avio_read(pb, input, DRM_BLOB_SIZE);
1016  avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
1017  avio_read(pb, file_checksum, 20);
1018 
1019  av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
1020  for (i = 0; i < 20; i++)
1021  av_log(c->fc, AV_LOG_INFO, "%02x", file_checksum[i]);
1022  av_log(c->fc, AV_LOG_INFO, "\n");
1023 
1024  /* verify activation data */
1025  if (!activation_bytes) {
1026  av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
1027  ret = 0; /* allow ffprobe to continue working on .aax files */
1028  goto fail;
1029  }
1030  if (c->activation_bytes_size != 4) {
1031  av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
1032  ret = AVERROR(EINVAL);
1033  goto fail;
1034  }
1035 
1036  /* verify fixed key */
1037  if (c->audible_fixed_key_size != 16) {
1038  av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
1039  ret = AVERROR(EINVAL);
1040  goto fail;
1041  }
1042 
1043  /* AAX (and AAX+) key derivation */
1044  av_sha_init(sha, 160);
1045  av_sha_update(sha, fixed_key, 16);
1046  av_sha_update(sha, activation_bytes, 4);
1047  av_sha_final(sha, intermediate_key);
1048  av_sha_init(sha, 160);
1049  av_sha_update(sha, fixed_key, 16);
1050  av_sha_update(sha, intermediate_key, 20);
1051  av_sha_update(sha, activation_bytes, 4);
1052  av_sha_final(sha, intermediate_iv);
1053  av_sha_init(sha, 160);
1054  av_sha_update(sha, intermediate_key, 16);
1055  av_sha_update(sha, intermediate_iv, 16);
1056  av_sha_final(sha, calculated_checksum);
1057  if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1058  av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1059  ret = AVERROR_INVALIDDATA;
1060  goto fail;
1061  }
1062  av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1063  av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1064  for (i = 0; i < 4; i++) {
1065  // file data (in output) is stored in big-endian mode
1066  if (activation_bytes[i] != output[3 - i]) { // critical error
1067  av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1068  ret = AVERROR_INVALIDDATA;
1069  goto fail;
1070  }
1071  }
1072  memcpy(c->file_key, output + 8, 16);
1073  memcpy(input, output + 26, 16);
1074  av_sha_init(sha, 160);
1075  av_sha_update(sha, input, 16);
1076  av_sha_update(sha, c->file_key, 16);
1077  av_sha_update(sha, fixed_key, 16);
1078  av_sha_final(sha, c->file_iv);
1079 
1080 fail:
1081  av_free(sha);
1082 
1083  return ret;
1084 }
1085 
1086 // Audible AAX (and AAX+) bytestream decryption
1087 static int aax_filter(uint8_t *input, int size, MOVContext *c)
1088 {
1089  int blocks = 0;
1090  unsigned char iv[16];
1091 
1092  memcpy(iv, c->file_iv, 16); // iv is overwritten
1093  blocks = size >> 4; // trailing bytes are not encrypted!
1094  av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1095  av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1096 
1097  return 0;
1098 }
1099 
1100 /* read major brand, minor version and compatible brands and store them as metadata */
1101 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1102 {
1103  uint32_t minor_ver;
1104  int comp_brand_size;
1105  char* comp_brands_str;
1106  uint8_t type[5] = {0};
1107  int ret = ffio_read_size(pb, type, 4);
1108  if (ret < 0)
1109  return ret;
1110 
1111  if (strcmp(type, "qt "))
1112  c->isom = 1;
1113  av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1114  av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1115  minor_ver = avio_rb32(pb); /* minor version */
1116  av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1117 
1118  comp_brand_size = atom.size - 8;
1119  if (comp_brand_size < 0)
1120  return AVERROR_INVALIDDATA;
1121  comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1122  if (!comp_brands_str)
1123  return AVERROR(ENOMEM);
1124 
1125  ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1126  if (ret < 0) {
1127  av_freep(&comp_brands_str);
1128  return ret;
1129  }
1130  comp_brands_str[comp_brand_size] = 0;
1131  av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1132  av_freep(&comp_brands_str);
1133 
1134  return 0;
1135 }
1136 
1137 /* this atom should contain all header atoms */
1138 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1139 {
1140  int ret;
1141 
1142  if (c->found_moov) {
1143  av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1144  avio_skip(pb, atom.size);
1145  return 0;
1146  }
1147 
1148  if ((ret = mov_read_default(c, pb, atom)) < 0)
1149  return ret;
1150  /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1151  /* so we don't parse the whole file if over a network */
1152  c->found_moov=1;
1153  return 0; /* now go for mdat */
1154 }
1155 
1156 static MOVFragmentStreamInfo * get_frag_stream_info(
1157  MOVFragmentIndex *frag_index,
1158  int index,
1159  int id)
1160 {
1161  int i;
1162  MOVFragmentIndexItem * item;
1163 
1164  if (index < 0 || index >= frag_index->nb_items)
1165  return NULL;
1166  item = &frag_index->item[index];
1167  for (i = 0; i < item->nb_stream_info; i++)
1168  if (item->stream_info[i].id == id)
1169  return &item->stream_info[i];
1170 
1171  // This shouldn't happen
1172  return NULL;
1173 }
1174 
1175 static void set_frag_stream(MOVFragmentIndex *frag_index, int id)
1176 {
1177  int i;
1178  MOVFragmentIndexItem * item;
1179 
1180  if (frag_index->current < 0 ||
1181  frag_index->current >= frag_index->nb_items)
1182  return;
1183 
1184  item = &frag_index->item[frag_index->current];
1185  for (i = 0; i < item->nb_stream_info; i++)
1186  if (item->stream_info[i].id == id) {
1187  item->current = i;
1188  return;
1189  }
1190 
1191  // id not found. This shouldn't happen.
1192  item->current = -1;
1193 }
1194 
1195 static MOVFragmentStreamInfo * get_current_frag_stream_info(
1196  MOVFragmentIndex *frag_index)
1197 {
1198  MOVFragmentIndexItem *item;
1199  if (frag_index->current < 0 ||
1200  frag_index->current >= frag_index->nb_items)
1201  return NULL;
1202 
1203  item = &frag_index->item[frag_index->current];
1204  if (item->current >= 0 && item->current < item->nb_stream_info)
1205  return &item->stream_info[item->current];
1206 
1207  // This shouldn't happen
1208  return NULL;
1209 }
1210 
1211 static int search_frag_moof_offset(MOVFragmentIndex *frag_index, int64_t offset)
1212 {
1213  int a, b, m;
1214  int64_t moof_offset;
1215 
1216  // Optimize for appending new entries
1217  if (!frag_index->nb_items ||
1218  frag_index->item[frag_index->nb_items - 1].moof_offset < offset)
1219  return frag_index->nb_items;
1220 
1221  a = -1;
1222  b = frag_index->nb_items;
1223 
1224  while (b - a > 1) {
1225  m = (a + b) >> 1;
1226  moof_offset = frag_index->item[m].moof_offset;
1227  if (moof_offset >= offset)
1228  b = m;
1229  if (moof_offset <= offset)
1230  a = m;
1231  }
1232  return b;
1233 }
1234 
1235 static int64_t get_stream_info_time(MOVFragmentStreamInfo * frag_stream_info)
1236 {
1237 
1238  if (frag_stream_info) {
1239  if (frag_stream_info->sidx_pts != AV_NOPTS_VALUE)
1240  return frag_stream_info->sidx_pts;
1241  if (frag_stream_info->first_tfra_pts != AV_NOPTS_VALUE)
1242  return frag_stream_info->first_tfra_pts;
1243  if (frag_stream_info->tfdt_dts != AV_NOPTS_VALUE)
1244  return frag_stream_info->tfdt_dts;
1245  }
1246  return AV_NOPTS_VALUE;
1247 }
1248 
1249 static int64_t get_frag_time(MOVFragmentIndex *frag_index,
1250  int index, int track_id)
1251 {
1252  MOVFragmentStreamInfo * frag_stream_info;
1253  int64_t timestamp;
1254  int i;
1255 
1256  if (track_id >= 0) {
1257  frag_stream_info = get_frag_stream_info(frag_index, index, track_id);
1258  return frag_stream_info->sidx_pts;
1259  }
1260 
1261  for (i = 0; i < frag_index->item[index].nb_stream_info; i++) {
1262  frag_stream_info = &frag_index->item[index].stream_info[i];
1263  timestamp = get_stream_info_time(frag_stream_info);
1264  if (timestamp != AV_NOPTS_VALUE)
1265  return timestamp;
1266  }
1267  return AV_NOPTS_VALUE;
1268 }
1269 
1270 static int search_frag_timestamp(MOVFragmentIndex *frag_index,
1271  AVStream *st, int64_t timestamp)
1272 {
1273  int a, b, m;
1274  int64_t frag_time;
1275  int id = -1;
1276 
1277  if (st) {
1278  // If the stream is referenced by any sidx, limit the search
1279  // to fragments that referenced this stream in the sidx
1280  MOVStreamContext *sc = st->priv_data;
1281  if (sc->has_sidx)
1282  id = st->id;
1283  }
1284 
1285  a = -1;
1286  b = frag_index->nb_items;
1287 
1288  while (b - a > 1) {
1289  m = (a + b) >> 1;
1290  frag_time = get_frag_time(frag_index, m, id);
1291  if (frag_time != AV_NOPTS_VALUE) {
1292  if (frag_time >= timestamp)
1293  b = m;
1294  if (frag_time <= timestamp)
1295  a = m;
1296  }
1297  }
1298  return a;
1299 }
1300 
1301 static int update_frag_index(MOVContext *c, int64_t offset)
1302 {
1303  int index, i;
1304  MOVFragmentIndexItem * item;
1305  MOVFragmentStreamInfo * frag_stream_info;
1306 
1307  // If moof_offset already exists in frag_index, return index to it
1308  index = search_frag_moof_offset(&c->frag_index, offset);
1309  if (index < c->frag_index.nb_items &&
1310  c->frag_index.item[index].moof_offset == offset)
1311  return index;
1312 
1313  // offset is not yet in frag index.
1314  // Insert new item at index (sorted by moof offset)
1315  item = av_fast_realloc(c->frag_index.item,
1316  &c->frag_index.allocated_size,
1317  (c->frag_index.nb_items + 1) *
1318  sizeof(*c->frag_index.item));
1319  if(!item)
1320  return -1;
1321  c->frag_index.item = item;
1322 
1323  frag_stream_info = av_realloc_array(NULL, c->fc->nb_streams,
1324  sizeof(*item->stream_info));
1325  if (!frag_stream_info)
1326  return -1;
1327 
1328  for (i = 0; i < c->fc->nb_streams; i++) {
1329  frag_stream_info[i].id = c->fc->streams[i]->id;
1330  frag_stream_info[i].sidx_pts = AV_NOPTS_VALUE;
1331  frag_stream_info[i].tfdt_dts = AV_NOPTS_VALUE;
1332  frag_stream_info[i].first_tfra_pts = AV_NOPTS_VALUE;
1333  frag_stream_info[i].index_entry = -1;
1334  frag_stream_info[i].encryption_index = NULL;
1335  }
1336 
1337  if (index < c->frag_index.nb_items)
1338  memmove(c->frag_index.item + index + 1, c->frag_index.item + index,
1339  (c->frag_index.nb_items - index) * sizeof(*c->frag_index.item));
1340 
1341  item = &c->frag_index.item[index];
1342  item->headers_read = 0;
1343  item->current = 0;
1344  item->nb_stream_info = c->fc->nb_streams;
1345  item->moof_offset = offset;
1346  item->stream_info = frag_stream_info;
1347  c->frag_index.nb_items++;
1348 
1349  return index;
1350 }
1351 
1352 static void fix_frag_index_entries(MOVFragmentIndex *frag_index, int index,
1353  int id, int entries)
1354 {
1355  int i;
1356  MOVFragmentStreamInfo * frag_stream_info;
1357 
1358  if (index < 0)
1359  return;
1360  for (i = index; i < frag_index->nb_items; i++) {
1361  frag_stream_info = get_frag_stream_info(frag_index, i, id);
1362  if (frag_stream_info && frag_stream_info->index_entry >= 0)
1363  frag_stream_info->index_entry += entries;
1364  }
1365 }
1366 
1367 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1368 {
1369  if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1370  c->has_looked_for_mfra = 1;
1371  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1372  int ret;
1373  av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1374  "for a mfra\n");
1375  if ((ret = mov_read_mfra(c, pb)) < 0) {
1376  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1377  "read the mfra (may be a live ismv)\n");
1378  }
1379  } else {
1380  av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1381  "seekable, can not look for mfra\n");
1382  }
1383  }
1384  c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
1385  av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1386  c->frag_index.current = update_frag_index(c, c->fragment.moof_offset);
1387  return mov_read_default(c, pb, atom);
1388 }
1389 
1390 static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1391 {
1392  if (time) {
1393  if(time >= 2082844800)
1394  time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1395 
1396  if ((int64_t)(time * 1000000ULL) / 1000000 != time) {
1397  av_log(NULL, AV_LOG_DEBUG, "creation_time is not representable\n");
1398  return;
1399  }
1400 
1401  avpriv_dict_set_timestamp(metadata, "creation_time", time * 1000000);
1402  }
1403 }
1404 
1405 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1406 {
1407  AVStream *st;
1408  MOVStreamContext *sc;
1409  int version;
1410  char language[4] = {0};
1411  unsigned lang;
1412  int64_t creation_time;
1413 
1414  if (c->fc->nb_streams < 1)
1415  return 0;
1416  st = c->fc->streams[c->fc->nb_streams-1];
1417  sc = st->priv_data;
1418 
1419  if (sc->time_scale) {
1420  av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1421  return AVERROR_INVALIDDATA;
1422  }
1423 
1424  version = avio_r8(pb);
1425  if (version > 1) {
1426  avpriv_request_sample(c->fc, "Version %d", version);
1427  return AVERROR_PATCHWELCOME;
1428  }
1429  avio_rb24(pb); /* flags */
1430  if (version == 1) {
1431  creation_time = avio_rb64(pb);
1432  avio_rb64(pb);
1433  } else {
1434  creation_time = avio_rb32(pb);
1435  avio_rb32(pb); /* modification time */
1436  }
1437  mov_metadata_creation_time(&st->metadata, creation_time);
1438 
1439  sc->time_scale = avio_rb32(pb);
1440  if (sc->time_scale <= 0) {
1441  av_log(c->fc, AV_LOG_ERROR, "Invalid mdhd time scale %d, defaulting to 1\n", sc->time_scale);
1442  sc->time_scale = 1;
1443  }
1444  st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1445 
1446  lang = avio_rb16(pb); /* language */
1447  if (ff_mov_lang_to_iso639(lang, language))
1448  av_dict_set(&st->metadata, "language", language, 0);
1449  avio_rb16(pb); /* quality */
1450 
1451  return 0;
1452 }
1453 
1454 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1455 {
1456  int i;
1457  int64_t creation_time;
1458  int version = avio_r8(pb); /* version */
1459  avio_rb24(pb); /* flags */
1460 
1461  if (version == 1) {
1462  creation_time = avio_rb64(pb);
1463  avio_rb64(pb);
1464  } else {
1465  creation_time = avio_rb32(pb);
1466  avio_rb32(pb); /* modification time */
1467  }
1468  mov_metadata_creation_time(&c->fc->metadata, creation_time);
1469  c->time_scale = avio_rb32(pb); /* time scale */
1470  if (c->time_scale <= 0) {
1471  av_log(c->fc, AV_LOG_ERROR, "Invalid mvhd time scale %d, defaulting to 1\n", c->time_scale);
1472  c->time_scale = 1;
1473  }
1474  av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1475 
1476  c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1477  // set the AVCodecContext duration because the duration of individual tracks
1478  // may be inaccurate
1479  if (c->time_scale > 0 && !c->trex_data)
1480  c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
1481  avio_rb32(pb); /* preferred scale */
1482 
1483  avio_rb16(pb); /* preferred volume */
1484 
1485  avio_skip(pb, 10); /* reserved */
1486 
1487  /* movie display matrix, store it in main context and use it later on */
1488  for (i = 0; i < 3; i++) {
1489  c->movie_display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
1490  c->movie_display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
1491  c->movie_display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
1492  }
1493 
1494  avio_rb32(pb); /* preview time */
1495  avio_rb32(pb); /* preview duration */
1496  avio_rb32(pb); /* poster time */
1497  avio_rb32(pb); /* selection time */
1498  avio_rb32(pb); /* selection duration */
1499  avio_rb32(pb); /* current time */
1500  avio_rb32(pb); /* next track ID */
1501 
1502  return 0;
1503 }
1504 
1505 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1506 {
1507  AVStream *st;
1508  int little_endian;
1509 
1510  if (c->fc->nb_streams < 1)
1511  return 0;
1512  st = c->fc->streams[c->fc->nb_streams-1];
1513 
1514  little_endian = avio_rb16(pb) & 0xFF;
1515  av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1516  if (little_endian == 1) {
1517  switch (st->codecpar->codec_id) {
1518  case AV_CODEC_ID_PCM_S24BE:
1519  st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
1520  break;
1521  case AV_CODEC_ID_PCM_S32BE:
1522  st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
1523  break;
1524  case AV_CODEC_ID_PCM_F32BE:
1525  st->codecpar->codec_id = AV_CODEC_ID_PCM_F32LE;
1526  break;
1527  case AV_CODEC_ID_PCM_F64BE:
1528  st->codecpar->codec_id = AV_CODEC_ID_PCM_F64LE;
1529  break;
1530  default:
1531  break;
1532  }
1533  }
1534  return 0;
1535 }
1536 
1537 static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1538 {
1539  AVStream *st;
1540  char color_parameter_type[5] = { 0 };
1541  uint16_t color_primaries, color_trc, color_matrix;
1542  int ret;
1543 
1544  if (c->fc->nb_streams < 1)
1545  return 0;
1546  st = c->fc->streams[c->fc->nb_streams - 1];
1547 
1548  ret = ffio_read_size(pb, color_parameter_type, 4);
1549  if (ret < 0)
1550  return ret;
1551  if (strncmp(color_parameter_type, "nclx", 4) &&
1552  strncmp(color_parameter_type, "nclc", 4)) {
1553  av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1554  color_parameter_type);
1555  return 0;
1556  }
1557 
1558  color_primaries = avio_rb16(pb);
1559  color_trc = avio_rb16(pb);
1560  color_matrix = avio_rb16(pb);
1561 
1562  av_log(c->fc, AV_LOG_TRACE,
1563  "%s: pri %d trc %d matrix %d",
1564  color_parameter_type, color_primaries, color_trc, color_matrix);
1565 
1566  if (!strncmp(color_parameter_type, "nclx", 4)) {
1567  uint8_t color_range = avio_r8(pb) >> 7;
1568  av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1569  if (color_range)
1570  st->codecpar->color_range = AVCOL_RANGE_JPEG;
1571  else
1572  st->codecpar->color_range = AVCOL_RANGE_MPEG;
1573  }
1574 
1575  if (!av_color_primaries_name(color_primaries))
1576  color_primaries = AVCOL_PRI_UNSPECIFIED;
1577  if (!av_color_transfer_name(color_trc))
1578  color_trc = AVCOL_TRC_UNSPECIFIED;
1579  if (!av_color_space_name(color_matrix))
1580  color_matrix = AVCOL_SPC_UNSPECIFIED;
1581 
1582  st->codecpar->color_primaries = color_primaries;
1583  st->codecpar->color_trc = color_trc;
1584  st->codecpar->color_space = color_matrix;
1585  av_log(c->fc, AV_LOG_TRACE, "\n");
1586 
1587  return 0;
1588 }
1589 
1590 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1591 {
1592  AVStream *st;
1593  unsigned mov_field_order;
1594  enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1595 
1596  if (c->fc->nb_streams < 1) // will happen with jp2 files
1597  return 0;
1598  st = c->fc->streams[c->fc->nb_streams-1];
1599  if (atom.size < 2)
1600  return AVERROR_INVALIDDATA;
1601  mov_field_order = avio_rb16(pb);
1602  if ((mov_field_order & 0xFF00) == 0x0100)
1603  decoded_field_order = AV_FIELD_PROGRESSIVE;
1604  else if ((mov_field_order & 0xFF00) == 0x0200) {
1605  switch (mov_field_order & 0xFF) {
1606  case 0x01: decoded_field_order = AV_FIELD_TT;
1607  break;
1608  case 0x06: decoded_field_order = AV_FIELD_BB;
1609  break;
1610  case 0x09: decoded_field_order = AV_FIELD_TB;
1611  break;
1612  case 0x0E: decoded_field_order = AV_FIELD_BT;
1613  break;
1614  }
1615  }
1616  if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1617  av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1618  }
1619  st->codecpar->field_order = decoded_field_order;
1620 
1621  return 0;
1622 }
1623 
1624 static int mov_realloc_extradata(AVCodecParameters *par, MOVAtom atom)
1625 {
1626  int err = 0;
1627  uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1628  if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1629  return AVERROR_INVALIDDATA;
1630  if ((err = av_reallocp(&par->extradata, size)) < 0) {
1631  par->extradata_size = 0;
1632  return err;
1633  }
1634  par->extradata_size = size - AV_INPUT_BUFFER_PADDING_SIZE;
1635  return 0;
1636 }
1637 
1638 /* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1639 static int64_t mov_read_atom_into_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1640  AVCodecParameters *par, uint8_t *buf)
1641 {
1642  int64_t result = atom.size;
1643  int err;
1644 
1645  AV_WB32(buf , atom.size + 8);
1646  AV_WL32(buf + 4, atom.type);
1647  err = ffio_read_size(pb, buf + 8, atom.size);
1648  if (err < 0) {
1649  par->extradata_size -= atom.size;
1650  return err;
1651  } else if (err < atom.size) {
1652  av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1653  par->extradata_size -= atom.size - err;
1654  result = err;
1655  }
1656  memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1657  return result;
1658 }
1659 
1660 /* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1661 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1662  enum AVCodecID codec_id)
1663 {
1664  AVStream *st;
1665  uint64_t original_size;
1666  int err;
1667 
1668  if (c->fc->nb_streams < 1) // will happen with jp2 files
1669  return 0;
1670  st = c->fc->streams[c->fc->nb_streams-1];
1671 
1672  if (st->codecpar->codec_id != codec_id)
1673  return 0; /* unexpected codec_id - don't mess with extradata */
1674 
1675  original_size = st->codecpar->extradata_size;
1676  err = mov_realloc_extradata(st->codecpar, atom);
1677  if (err)
1678  return err;
1679 
1680  err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1681  if (err < 0)
1682  return err;
1683  return 0; // Note: this is the original behavior to ignore truncation.
1684 }
1685 
1686 /* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1687 static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1688 {
1689  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1690 }
1691 
1692 static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1693 {
1694  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1695 }
1696 
1697 static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1698 {
1699  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1700 }
1701 
1702 static int mov_read_dpxe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1703 {
1704  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1705 }
1706 
1707 static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1708 {
1709  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1710  if(ret == 0)
1711  ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1712  return ret;
1713 }
1714 
1715 static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1716 {
1717  int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1718 
1719  if (!ret && c->fc->nb_streams >= 1) {
1720  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1721  if (par->extradata_size >= 40) {
1722  par->height = AV_RB16(&par->extradata[36]);
1723  par->width = AV_RB16(&par->extradata[38]);
1724  }
1725  }
1726  return ret;
1727 }
1728 
1729 static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1730 {
1731  if (c->fc->nb_streams >= 1) {
1732  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1733  if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1734  par->codec_id == AV_CODEC_ID_H264 &&
1735  atom.size > 11) {
1736  int cid;
1737  avio_skip(pb, 10);
1738  cid = avio_rb16(pb);
1739  /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1740  if (cid == 0xd4d || cid == 0xd4e)
1741  par->width = 1440;
1742  return 0;
1743  } else if ((par->codec_tag == MKTAG('A', 'V', 'd', '1') ||
1744  par->codec_tag == MKTAG('A', 'V', 'j', '2') ||
1745  par->codec_tag == MKTAG('A', 'V', 'd', 'n')) &&
1746  atom.size >= 24) {
1747  int num, den;
1748  avio_skip(pb, 12);
1749  num = avio_rb32(pb);
1750  den = avio_rb32(pb);
1751  if (num <= 0 || den <= 0)
1752  return 0;
1753  switch (avio_rb32(pb)) {
1754  case 2:
1755  if (den >= INT_MAX / 2)
1756  return 0;
1757  den *= 2;
1758  case 1:
1759  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1760  c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1761  default:
1762  return 0;
1763  }
1764  }
1765  }
1766 
1767  return mov_read_avid(c, pb, atom);
1768 }
1769 
1770 static int mov_read_aclr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1771 {
1772  int ret = 0;
1773  int length = 0;
1774  uint64_t original_size;
1775  if (c->fc->nb_streams >= 1) {
1776  AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1777  if (par->codec_id == AV_CODEC_ID_H264)
1778  return 0;
1779  if (atom.size == 16) {
1780  original_size = par->extradata_size;
1781  ret = mov_realloc_extradata(par, atom);
1782  if (!ret) {
1783  length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1784  if (length == atom.size) {
1785  const uint8_t range_value = par->extradata[original_size + 19];
1786  switch (range_value) {
1787  case 1:
1788  par->color_range = AVCOL_RANGE_MPEG;
1789  break;
1790  case 2:
1791  par->color_range = AVCOL_RANGE_JPEG;
1792  break;
1793  default:
1794  av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1795  break;
1796  }
1797  ff_dlog(c, "color_range: %d\n", par->color_range);
1798  } else {
1799  /* For some reason the whole atom was not added to the extradata */
1800  av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1801  }
1802  } else {
1803  av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1804  }
1805  } else {
1806  av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1807  }
1808  }
1809 
1810  return ret;
1811 }
1812 
1813 static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1814 {
1815  return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1816 }
1817 
1818 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1819 {
1820  AVStream *st;
1821  int ret;
1822 
1823  if (c->fc->nb_streams < 1)
1824  return 0;
1825  st = c->fc->streams[c->fc->nb_streams-1];
1826 
1827  if ((uint64_t)atom.size > (1<<30))
1828  return AVERROR_INVALIDDATA;
1829 
1830  if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1831  st->codecpar->codec_id == AV_CODEC_ID_QDMC ||
1832  st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
1833  // pass all frma atom to codec, needed at least for QDMC and QDM2
1834  av_freep(&st->codecpar->extradata);
1835  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1836  if (ret < 0)
1837  return ret;
1838  } else if (atom.size > 8) { /* to read frma, esds atoms */
1839  if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1840  uint64_t buffer;
1841  ret = ffio_ensure_seekback(pb, 8);
1842  if (ret < 0)
1843  return ret;
1844  buffer = avio_rb64(pb);
1845  atom.size -= 8;
1846  if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1847  && buffer >> 32 <= atom.size
1848  && buffer >> 32 >= 8) {
1849  avio_skip(pb, -8);
1850  atom.size += 8;
1851  } else if (!st->codecpar->extradata_size) {
1852 #define ALAC_EXTRADATA_SIZE 36
1853  st->codecpar->extradata = av_mallocz(ALAC_EXTRADATA_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
1854  if (!st->codecpar->extradata)
1855  return AVERROR(ENOMEM);
1856  st->codecpar->extradata_size = ALAC_EXTRADATA_SIZE;
1857  AV_WB32(st->codecpar->extradata , ALAC_EXTRADATA_SIZE);
1858  AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1859  AV_WB64(st->codecpar->extradata + 12, buffer);
1860  avio_read(pb, st->codecpar->extradata + 20, 16);
1861  avio_skip(pb, atom.size - 24);
1862  return 0;
1863  }
1864  }
1865  if ((ret = mov_read_default(c, pb, atom)) < 0)
1866  return ret;
1867  } else
1868  avio_skip(pb, atom.size);
1869  return 0;
1870 }
1871 
1872 /**
1873  * This function reads atom content and puts data in extradata without tag
1874  * nor size unlike mov_read_extradata.
1875  */
1876 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1877 {
1878  AVStream *st;
1879  int ret;
1880 
1881  if (c->fc->nb_streams < 1)
1882  return 0;
1883  st = c->fc->streams[c->fc->nb_streams-1];
1884 
1885  if ((uint64_t)atom.size > (1<<30))
1886  return AVERROR_INVALIDDATA;
1887 
1888  if (atom.size >= 10) {
1889  // Broken files created by legacy versions of libavformat will
1890  // wrap a whole fiel atom inside of a glbl atom.
1891  unsigned size = avio_rb32(pb);
1892  unsigned type = avio_rl32(pb);
1893  avio_seek(pb, -8, SEEK_CUR);
1894  if (type == MKTAG('f','i','e','l') && size == atom.size)
1895  return mov_read_default(c, pb, atom);
1896  }
1897  if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1898  av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1899  return 0;
1900  }
1901  av_freep(&st->codecpar->extradata);
1902  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1903  if (ret < 0)
1904  return ret;
1905  if (atom.type == MKTAG('h','v','c','C') && st->codecpar->codec_tag == MKTAG('d','v','h','1'))
1906  st->codecpar->codec_id = AV_CODEC_ID_HEVC;
1907 
1908  return 0;
1909 }
1910 
1911 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1912 {
1913  AVStream *st;
1914  uint8_t profile_level;
1915  int ret;
1916 
1917  if (c->fc->nb_streams < 1)
1918  return 0;
1919  st = c->fc->streams[c->fc->nb_streams-1];
1920 
1921  if (atom.size >= (1<<28) || atom.size < 7)
1922  return AVERROR_INVALIDDATA;
1923 
1924  profile_level = avio_r8(pb);
1925  if ((profile_level & 0xf0) != 0xc0)
1926  return 0;
1927 
1928  avio_seek(pb, 6, SEEK_CUR);
1929  av_freep(&st->codecpar->extradata);
1930  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1931  if (ret < 0)
1932  return ret;
1933 
1934  return 0;
1935 }
1936 
1937 /**
1938  * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1939  * but can have extradata appended at the end after the 40 bytes belonging
1940  * to the struct.
1941  */
1942 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1943 {
1944  AVStream *st;
1945  int ret;
1946 
1947  if (c->fc->nb_streams < 1)
1948  return 0;
1949  if (atom.size <= 40)
1950  return 0;
1951  st = c->fc->streams[c->fc->nb_streams-1];
1952 
1953  if ((uint64_t)atom.size > (1<<30))
1954  return AVERROR_INVALIDDATA;
1955 
1956  avio_skip(pb, 40);
1957  av_freep(&st->codecpar->extradata);
1958  ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1959  if (ret < 0)
1960  return ret;
1961 
1962  return 0;
1963 }
1964 
1965 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1966 {
1967  AVStream *st;
1968  MOVStreamContext *sc;
1969  unsigned int i, entries;
1970 
1971  if (c->fc->nb_streams < 1)
1972  return 0;
1973  st = c->fc->streams[c->fc->nb_streams-1];
1974  sc = st->priv_data;
1975 
1976  avio_r8(pb); /* version */
1977  avio_rb24(pb); /* flags */
1978 
1979  entries = avio_rb32(pb);
1980 
1981  if (!entries)
1982  return 0;
1983 
1984  if (sc->chunk_offsets)
1985  av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1986  av_free(sc->chunk_offsets);
1987  sc->chunk_count = 0;
1988  sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1989  if (!sc->chunk_offsets)
1990  return AVERROR(ENOMEM);
1991  sc->chunk_count = entries;
1992 
1993  if (atom.type == MKTAG('s','t','c','o'))
1994  for (i = 0; i < entries && !pb->eof_reached; i++)
1995  sc->chunk_offsets[i] = avio_rb32(pb);
1996  else if (atom.type == MKTAG('c','o','6','4'))
1997  for (i = 0; i < entries && !pb->eof_reached; i++)
1998  sc->chunk_offsets[i] = avio_rb64(pb);
1999  else
2000  return AVERROR_INVALIDDATA;
2001 
2002  sc->chunk_count = i;
2003 
2004  if (pb->eof_reached) {
2005  av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted STCO atom\n");
2006  return AVERROR_EOF;
2007  }
2008 
2009  return 0;
2010 }
2011 
2012 static int mov_codec_id(AVStream *st, uint32_t format)
2013 {
2014  int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
2015 
2016  if (id <= 0 &&
2017  ((format & 0xFFFF) == 'm' + ('s' << 8) ||
2018  (format & 0xFFFF) == 'T' + ('S' << 8)))
2019  id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
2020 
2021  if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
2022  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2023  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
2024  /* skip old ASF MPEG-4 tag */
2025  format && format != MKTAG('m','p','4','s')) {
2026  id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2027  if (id <= 0)
2028  id = ff_codec_get_id(ff_codec_bmp_tags, format);
2029  if (id > 0)
2030  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2031  else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
2032  (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE &&
2033  st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
2034  id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
2035  if (id > 0)
2036  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2037  else
2038  id = ff_codec_get_id(ff_codec_movdata_tags, format);
2039  }
2040  }
2041 
2042  st->codecpar->codec_tag = format;
2043 
2044  return id;
2045 }
2046 
2047 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
2048  AVStream *st, MOVStreamContext *sc)
2049 {
2050  uint8_t codec_name[32] = { 0 };
2051  int64_t stsd_start;
2052  unsigned int len;
2053 
2054  /* The first 16 bytes of the video sample description are already
2055  * read in ff_mov_read_stsd_entries() */
2056  stsd_start = avio_tell(pb) - 16;
2057 
2058  avio_rb16(pb); /* version */
2059  avio_rb16(pb); /* revision level */
2060  avio_rb32(pb); /* vendor */
2061  avio_rb32(pb); /* temporal quality */
2062  avio_rb32(pb); /* spatial quality */
2063 
2064  st->codecpar->width = avio_rb16(pb); /* width */
2065  st->codecpar->height = avio_rb16(pb); /* height */
2066 
2067  avio_rb32(pb); /* horiz resolution */
2068  avio_rb32(pb); /* vert resolution */
2069  avio_rb32(pb); /* data size, always 0 */
2070  avio_rb16(pb); /* frames per samples */
2071 
2072  len = avio_r8(pb); /* codec name, pascal string */
2073  if (len > 31)
2074  len = 31;
2075  mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
2076  if (len < 31)
2077  avio_skip(pb, 31 - len);
2078 
2079  if (codec_name[0])
2080  av_dict_set(&st->metadata, "encoder", codec_name, 0);
2081 
2082  /* codec_tag YV12 triggers an UV swap in rawdec.c */
2083  if (!strncmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
2084  st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
2085  st->codecpar->width &= ~1;
2086  st->codecpar->height &= ~1;
2087  }
2088  /* Flash Media Server uses tag H.263 with Sorenson Spark */
2089  if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
2090  !strncmp(codec_name, "Sorenson H263", 13))
2091  st->codecpar->codec_id = AV_CODEC_ID_FLV1;
2092 
2093  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
2094 
2095  avio_seek(pb, stsd_start, SEEK_SET);
2096 
2097  if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
2098  st->codecpar->bits_per_coded_sample &= 0x1F;
2099  sc->has_palette = 1;
2100  }
2101 }
2102 
2103 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
2104  AVStream *st, MOVStreamContext *sc)
2105 {
2106  int bits_per_sample, flags;
2107  uint16_t version = avio_rb16(pb);
2108  AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
2109 
2110  avio_rb16(pb); /* revision level */
2111  avio_rb32(pb); /* vendor */
2112 
2113  st->codecpar->channels = avio_rb16(pb); /* channel count */
2114  st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
2115  av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
2116 
2117  sc->audio_cid = avio_rb16(pb);
2118  avio_rb16(pb); /* packet size = 0 */
2119 
2120  st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
2121 
2122  // Read QT version 1 fields. In version 0 these do not exist.
2123  av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
2124  if (!c->isom ||
2125  (compatible_brands && strstr(compatible_brands->value, "qt ")) ||
2126  (sc->stsd_version == 0 && version > 0)) {
2127  if (version == 1) {
2128  sc->samples_per_frame = avio_rb32(pb);
2129  avio_rb32(pb); /* bytes per packet */
2130  sc->bytes_per_frame = avio_rb32(pb);
2131  avio_rb32(pb); /* bytes per sample */
2132  } else if (version == 2) {
2133  avio_rb32(pb); /* sizeof struct only */
2134  st->codecpar->sample_rate = av_int2double(avio_rb64(pb));
2135  st->codecpar->channels = avio_rb32(pb);
2136  avio_rb32(pb); /* always 0x7F000000 */
2137  st->codecpar->bits_per_coded_sample = avio_rb32(pb);
2138 
2139  flags = avio_rb32(pb); /* lpcm format specific flag */
2140  sc->bytes_per_frame = avio_rb32(pb);
2141  sc->samples_per_frame = avio_rb32(pb);
2142  if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
2143  st->codecpar->codec_id =
2144  ff_mov_get_lpcm_codec_id(st->codecpar->bits_per_coded_sample,
2145  flags);
2146  }
2147  if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
2148  /* can't correctly handle variable sized packet as audio unit */
2149  switch (st->codecpar->codec_id) {
2150  case AV_CODEC_ID_MP2:
2151  case AV_CODEC_ID_MP3:
2152  st->need_parsing = AVSTREAM_PARSE_FULL;
2153  break;
2154  }
2155  }
2156  }
2157 
2158  if (sc->format == 0) {
2159  if (st->codecpar->bits_per_coded_sample == 8)
2160  st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
2161  else if (st->codecpar->bits_per_coded_sample == 16)
2162  st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
2163  }
2164 
2165  switch (st->codecpar->codec_id) {
2166  case AV_CODEC_ID_PCM_S8:
2167  case AV_CODEC_ID_PCM_U8:
2168  if (st->codecpar->bits_per_coded_sample == 16)
2169  st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
2170  break;
2171  case AV_CODEC_ID_PCM_S16LE:
2172  case AV_CODEC_ID_PCM_S16BE:
2173  if (st->codecpar->bits_per_coded_sample == 8)
2174  st->codecpar->codec_id = AV_CODEC_ID_PCM_S8;
2175  else if (st->codecpar->bits_per_coded_sample == 24)
2176  st->codecpar->codec_id =
2177  st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE ?
2178  AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2179  else if (st->codecpar->bits_per_coded_sample == 32)
2180  st->codecpar->codec_id =
2181  st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE ?
2182  AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2183  break;
2184  /* set values for old format before stsd version 1 appeared */
2185  case AV_CODEC_ID_MACE3:
2186  sc->samples_per_frame = 6;
2187  sc->bytes_per_frame = 2 * st->codecpar->channels;
2188  break;
2189  case AV_CODEC_ID_MACE6:
2190  sc->samples_per_frame = 6;
2191  sc->bytes_per_frame = 1 * st->codecpar->channels;
2192  break;
2193  case AV_CODEC_ID_ADPCM_IMA_QT:
2194  sc->samples_per_frame = 64;
2195  sc->bytes_per_frame = 34 * st->codecpar->channels;
2196  break;
2197  case AV_CODEC_ID_GSM:
2198  sc->samples_per_frame = 160;
2199  sc->bytes_per_frame = 33;
2200  break;
2201  default:
2202  break;
2203  }
2204 
2205  bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2206  if (bits_per_sample) {
2207  st->codecpar->bits_per_coded_sample = bits_per_sample;
2208  sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
2209  }
2210 }
2211 
2212 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
2213  AVStream *st, MOVStreamContext *sc,
2214  int64_t size)
2215 {
2216  // ttxt stsd contains display flags, justification, background
2217  // color, fonts, and default styles, so fake an atom to read it
2218  MOVAtom fake_atom = { .size = size };
2219  // mp4s contains a regular esds atom
2220  if (st->codecpar->codec_tag != AV_RL32("mp4s"))
2221  mov_read_glbl(c, pb, fake_atom);
2222  st->codecpar->width = sc->width;
2223  st->codecpar->height = sc->height;
2224 }
2225 
2226 static uint32_t yuv_to_rgba(uint32_t ycbcr)
2227 {
2228  uint8_t r, g, b;
2229  int y, cb, cr;
2230 
2231  y = (ycbcr >> 16) & 0xFF;
2232  cr = (ycbcr >> 8) & 0xFF;
2233  cb = ycbcr & 0xFF;
2234 
2235  b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
2236  g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
2237  r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
2238 
2239  return (r << 16) | (g << 8) | b;
2240 }
2241 
2242 static int mov_rewrite_dvd_sub_extradata(AVStream *st)
2243 {
2244  char buf[256] = {0};
2245  uint8_t *src = st->codecpar->extradata;
2246  int i;
2247 
2248  if (st->codecpar->extradata_size != 64)
2249  return 0;
2250 
2251  if (st->codecpar->width > 0 && st->codecpar->height > 0)
2252  snprintf(buf, sizeof(buf), "size: %dx%d\n",
2253  st->codecpar->width, st->codecpar->height);
2254  av_strlcat(buf, "palette: ", sizeof(buf));
2255 
2256  for (i = 0; i < 16; i++) {
2257  uint32_t yuv = AV_RB32(src + i * 4);
2258  uint32_t rgba = yuv_to_rgba(yuv);
2259 
2260  av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2261  }
2262 
2263  if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2264  return 0;
2265 
2266  av_freep(&st->codecpar->extradata);
2267  st->codecpar->extradata_size = 0;
2268  st->codecpar->extradata = av_mallocz(strlen(buf) + AV_INPUT_BUFFER_PADDING_SIZE);
2269  if (!st->codecpar->extradata)
2270  return AVERROR(ENOMEM);
2271  st->codecpar->extradata_size = strlen(buf);
2272  memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2273 
2274  return 0;
2275 }
2276 
2277 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
2278  AVStream *st, MOVStreamContext *sc,
2279  int64_t size)
2280 {
2281  int ret;
2282 
2283  if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2284  if ((int)size != size)
2285  return AVERROR(ENOMEM);
2286 
2287  ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2288  if (ret < 0)
2289  return ret;
2290  if (size > 16) {
2291  MOVStreamContext *tmcd_ctx = st->priv_data;
2292  int val;
2293  val = AV_RB32(st->codecpar->extradata + 4);
2294  tmcd_ctx->tmcd_flags = val;
2295  st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2296  st->avg_frame_rate.den = 1;
2297 #if FF_API_LAVF_AVCTX
2298 FF_DISABLE_DEPRECATION_WARNINGS
2299  st->codec->time_base = av_inv_q(st->avg_frame_rate);
2300 FF_ENABLE_DEPRECATION_WARNINGS
2301 #endif
2302  /* adjust for per frame dur in counter mode */
2303  if (tmcd_ctx->tmcd_flags & 0x0008) {
2304  int timescale = AV_RB32(st->codecpar->extradata + 8);
2305  int framedur = AV_RB32(st->codecpar->extradata + 12);
2306  st->avg_frame_rate.num *= timescale;
2307  st->avg_frame_rate.den *= framedur;
2308 #if FF_API_LAVF_AVCTX
2309 FF_DISABLE_DEPRECATION_WARNINGS
2310  st->codec->time_base.den *= timescale;
2311  st->codec->time_base.num *= framedur;
2312 FF_ENABLE_DEPRECATION_WARNINGS
2313 #endif
2314  }
2315  if (size > 30) {
2316  uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2317  uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2318  if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2319  uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2320  if (str_size > 0 && size >= (int)str_size + 26) {
2321  char *reel_name = av_malloc(str_size + 1);
2322  if (!reel_name)
2323  return AVERROR(ENOMEM);
2324  memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2325  reel_name[str_size] = 0; /* Add null terminator */
2326  /* don't add reel_name if emtpy string */
2327  if (*reel_name == 0) {
2328  av_free(reel_name);
2329  } else {
2330  av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2331  }
2332  }
2333  }
2334  }
2335  }
2336  } else {
2337  /* other codec type, just skip (rtp, mp4s ...) */
2338  avio_skip(pb, size);
2339  }
2340  return 0;
2341 }
2342 
2343 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
2344  AVStream *st, MOVStreamContext *sc)
2345 {
2346  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2347  !st->codecpar->sample_rate && sc->time_scale > 1)
2348  st->codecpar->sample_rate = sc->time_scale;
2349 
2350  /* special codec parameters handling */
2351  switch (st->codecpar->codec_id) {
2352 #if CONFIG_DV_DEMUXER
2353  case AV_CODEC_ID_DVAUDIO:
2354  c->dv_fctx = avformat_alloc_context();
2355  if (!c->dv_fctx) {
2356  av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2357  return AVERROR(ENOMEM);
2358  }
2359  c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
2360  if (!c->dv_demux) {
2361  av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2362  return AVERROR(ENOMEM);
2363  }
2364  sc->dv_audio_container = 1;
2365  st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
2366  break;
2367 #endif
2368  /* no ifdef since parameters are always those */
2369  case AV_CODEC_ID_QCELP:
2370  st->codecpar->channels = 1;
2371  // force sample rate for qcelp when not stored in mov
2372  if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2373  st->codecpar->sample_rate = 8000;
2374  // FIXME: Why is the following needed for some files?
2375  sc->samples_per_frame = 160;
2376  if (!sc->bytes_per_frame)
2377  sc->bytes_per_frame = 35;
2378  break;
2379  case AV_CODEC_ID_AMR_NB:
2380  st->codecpar->channels = 1;
2381  /* force sample rate for amr, stsd in 3gp does not store sample rate */
2382  st->codecpar->sample_rate = 8000;
2383  break;
2384  case AV_CODEC_ID_AMR_WB:
2385  st->codecpar->channels = 1;
2386  st->codecpar->sample_rate = 16000;
2387  break;
2388  case AV_CODEC_ID_MP2:
2389  case AV_CODEC_ID_MP3:
2390  /* force type after stsd for m1a hdlr */
2391  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2392  break;
2393  case AV_CODEC_ID_GSM:
2394  case AV_CODEC_ID_ADPCM_MS:
2395  case AV_CODEC_ID_ADPCM_IMA_WAV:
2396  case AV_CODEC_ID_ILBC:
2397  case AV_CODEC_ID_MACE3:
2398  case AV_CODEC_ID_MACE6:
2399  case AV_CODEC_ID_QDM2:
2400  st->codecpar->block_align = sc->bytes_per_frame;
2401  break;
2402  case AV_CODEC_ID_ALAC:
2403  if (st->codecpar->extradata_size == 36) {
2404  st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2405  st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2406  }
2407  break;
2408  case AV_CODEC_ID_AC3:
2409  case AV_CODEC_ID_EAC3:
2410  case AV_CODEC_ID_MPEG1VIDEO:
2411  case AV_CODEC_ID_VC1:
2412  case AV_CODEC_ID_VP8:
2413  case AV_CODEC_ID_VP9:
2414  st->need_parsing = AVSTREAM_PARSE_FULL;
2415  break;
2416  default:
2417  break;
2418  }
2419  return 0;
2420 }
2421 
2422 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
2423  int codec_tag, int format,
2424  int64_t size)
2425 {
2426  int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2427 
2428  if (codec_tag &&
2429  (codec_tag != format &&
2430  // AVID 1:1 samples with differing data format and codec tag exist
2431  (codec_tag != AV_RL32("AV1x") || format != AV_RL32("AVup")) &&
2432  // prores is allowed to have differing data format and codec tag
2433  codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
2434  // so is dv (sigh)
2435  codec_tag != AV_RL32("dvpp") && codec_tag != AV_RL32("dvcp") &&
2436  (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2437  : codec_tag != MKTAG('j','p','e','g')))) {
2438  /* Multiple fourcc, we skip JPEG. This is not correct, we should
2439  * export it as a separate AVStream but this needs a few changes
2440  * in the MOV demuxer, patch welcome. */
2441 
2442  av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2443  avio_skip(pb, size);
2444  return 1;
2445  }
2446 
2447  return 0;
2448 }
2449 
2450 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
2451 {
2452  AVStream *st;
2453  MOVStreamContext *sc;
2454  int pseudo_stream_id;
2455 
2456  av_assert0 (c->fc->nb_streams >= 1);
2457  st = c->fc->streams[c->fc->nb_streams-1];
2458  sc = st->priv_data;
2459 
2460  for (pseudo_stream_id = 0;
2461  pseudo_stream_id < entries && !pb->eof_reached;
2462  pseudo_stream_id++) {
2463  //Parsing Sample description table
2464  enum AVCodecID id;
2465  int ret, dref_id = 1;
2466  MOVAtom a = { AV_RL32("stsd") };
2467  int64_t start_pos = avio_tell(pb);
2468  int64_t size = avio_rb32(pb); /* size */
2469  uint32_t format = avio_rl32(pb); /* data format */
2470 
2471  if (size >= 16) {
2472  avio_rb32(pb); /* reserved */
2473  avio_rb16(pb); /* reserved */
2474  dref_id = avio_rb16(pb);
2475  } else if (size <= 7) {
2476  av_log(c->fc, AV_LOG_ERROR,
2477  "invalid size %"PRId64" in stsd\n", size);
2478  return AVERROR_INVALIDDATA;
2479  }
2480 
2481  if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2482  size - (avio_tell(pb) - start_pos))) {
2483  sc->stsd_count++;
2484  continue;
2485  }
2486 
2487  sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2488  sc->dref_id= dref_id;
2489  sc->format = format;
2490 
2491  id = mov_codec_id(st, format);
2492 
2493  av_log(c->fc, AV_LOG_TRACE,
2494  "size=%"PRId64" 4CC=%s codec_type=%d\n", size,
2495  av_fourcc2str(format), st->codecpar->codec_type);
2496 
2497  st->codecpar->codec_id = id;
2498  if (st->codecpar->codec_type==AVMEDIA_TYPE_VIDEO) {
2499  mov_parse_stsd_video(c, pb, st, sc);
2500  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2501  mov_parse_stsd_audio(c, pb, st, sc);
2502  if (st->codecpar->sample_rate < 0) {
2503  av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
2504  return AVERROR_INVALIDDATA;
2505  }
2506  } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2507  mov_parse_stsd_subtitle(c, pb, st, sc,
2508  size - (avio_tell(pb) - start_pos));
2509  } else {
2510  ret = mov_parse_stsd_data(c, pb, st, sc,
2511  size - (avio_tell(pb) - start_pos));
2512  if (ret < 0)
2513  return ret;
2514  }
2515  /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2516  a.size = size - (avio_tell(pb) - start_pos);
2517  if (a.size > 8) {
2518  if ((ret = mov_read_default(c, pb, a)) < 0)
2519  return ret;
2520  } else if (a.size > 0)
2521  avio_skip(pb, a.size);
2522 
2523  if (sc->extradata && st->codecpar->extradata) {
2524  int extra_size = st->codecpar->extradata_size;
2525 
2526  /* Move the current stream extradata to the stream context one. */
2527  sc->extradata_size[pseudo_stream_id] = extra_size;
2528  sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
2529  if (!sc->extradata[pseudo_stream_id])
2530  return AVERROR(ENOMEM);
2531  memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
2532  av_freep(&st->codecpar->extradata);
2533  st->codecpar->extradata_size = 0;
2534  }
2535  sc->stsd_count++;
2536  }
2537 
2538  if (pb->eof_reached) {
2539  av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted STSD atom\n");
2540  return AVERROR_EOF;
2541  }
2542 
2543  return 0;
2544 }
2545 
2546 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2547 {
2548  AVStream *st;
2549  MOVStreamContext *sc;
2550  int ret, entries;
2551 
2552  if (c->fc->nb_streams < 1)
2553  return 0;
2554  st = c->fc->streams[c->fc->nb_streams - 1];
2555  sc = st->priv_data;
2556 
2557  sc->stsd_version = avio_r8(pb);
2558  avio_rb24(pb); /* flags */
2559  entries = avio_rb32(pb);
2560 
2561  /* Each entry contains a size (4 bytes) and format (4 bytes). */
2562  if (entries <= 0 || entries > atom.size / 8) {
2563  av_log(c->fc, AV_LOG_ERROR, "invalid STSD entries %d\n", entries);
2564  return AVERROR_INVALIDDATA;
2565  }
2566 
2567  if (sc->extradata) {
2568  av_log(c->fc, AV_LOG_ERROR,
2569  "Duplicate stsd found in this track.\n");
2570  return AVERROR_INVALIDDATA;
2571  }
2572 
2573  /* Prepare space for hosting multiple extradata. */
2574  sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
2575  if (!sc->extradata)
2576  return AVERROR(ENOMEM);
2577 
2578  sc->extradata_size = av_mallocz_array(entries, sizeof(*sc->extradata_size));
2579  if (!sc->extradata_size) {
2580  ret = AVERROR(ENOMEM);
2581  goto fail;
2582  }
2583 
2584  ret = ff_mov_read_stsd_entries(c, pb, entries);
2585  if (ret < 0)
2586  goto fail;
2587 
2588  /* Restore back the primary extradata. */
2589  av_freep(&st->codecpar->extradata);
2590  st->codecpar->extradata_size = sc->extradata_size[0];
2591  if (sc->extradata_size[0]) {
2592  st->codecpar->extradata = av_mallocz(sc->extradata_size[0] + AV_INPUT_BUFFER_PADDING_SIZE);
2593  if (!st->codecpar->extradata)
2594  return AVERROR(ENOMEM);
2595  memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
2596  }
2597 
2598  return mov_finalize_stsd_codec(c, pb, st, sc);
2599 fail:
2600  if (sc->extradata) {
2601  int j;
2602  for (j = 0; j < sc->stsd_count; j++)
2603  av_freep(&sc->extradata[j]);
2604  }
2605 
2606  av_freep(&sc->extradata);
2607  av_freep(&sc->extradata_size);
2608  return ret;
2609 }
2610 
2611 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2612 {
2613  AVStream *st;
2614  MOVStreamContext *sc;
2615  unsigned int i, entries;
2616 
2617  if (c->fc->nb_streams < 1)
2618  return 0;
2619  st = c->fc->streams[c->fc->nb_streams-1];
2620  sc = st->priv_data;
2621 
2622  avio_r8(pb); /* version */
2623  avio_rb24(pb); /* flags */
2624 
2625  entries = avio_rb32(pb);
2626  if ((uint64_t)entries * 12 + 4 > atom.size)
2627  return AVERROR_INVALIDDATA;
2628 
2629  av_log(c->fc, AV_LOG_TRACE, "track[%u].stsc.entries = %u\n", c->fc->nb_streams - 1, entries);
2630 
2631  if (!entries)
2632  return 0;
2633  if (sc->stsc_data)
2634  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2635  av_free(sc->stsc_data);
2636  sc->stsc_count = 0;
2637  sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2638  if (!sc->stsc_data)
2639  return AVERROR(ENOMEM);
2640 
2641  for (i = 0; i < entries && !pb->eof_reached; i++) {
2642  sc->stsc_data[i].first = avio_rb32(pb);
2643  sc->stsc_data[i].count = avio_rb32(pb);
2644  sc->stsc_data[i].id = avio_rb32(pb);
2645  }
2646 
2647  sc->stsc_count = i;
2648  for (i = sc->stsc_count - 1; i < UINT_MAX; i--) {
2649  int64_t first_min = i + 1;
2650  if ((i+1 < sc->stsc_count && sc->stsc_data[i].first >= sc->stsc_data[i+1].first) ||
2651  (i > 0 && sc->stsc_data[i].first <= sc->stsc_data[i-1].first) ||
2652  sc->stsc_data[i].first < first_min ||
2653  sc->stsc_data[i].count < 1 ||
2654  sc->stsc_data[i].id < 1) {
2655  av_log(c->fc, AV_LOG_WARNING, "STSC entry %d is invalid (first=%d count=%d id=%d)\n", i, sc->stsc_data[i].first, sc->stsc_data[i].count, sc->stsc_data[i].id);
2656  if (i+1 >= sc->stsc_count) {
2657  sc->stsc_data[i].first = FFMAX(sc->stsc_data[i].first, first_min);
2658  if (i > 0 && sc->stsc_data[i].first <= sc->stsc_data[i-1].first)
2659  sc->stsc_data[i].first = FFMIN(sc->stsc_data[i-1].first + 1LL, INT_MAX);
2660  sc->stsc_data[i].count = FFMAX(sc->stsc_data[i].count, 1);
2661  sc->stsc_data[i].id = FFMAX(sc->stsc_data[i].id, 1);
2662  continue;
2663  }
2664  av_assert0(sc->stsc_data[i+1].first >= 2);
2665  // We replace this entry by the next valid
2666  sc->stsc_data[i].first = sc->stsc_data[i+1].first - 1;
2667  sc->stsc_data[i].count = sc->stsc_data[i+1].count;
2668  sc->stsc_data[i].id = sc->stsc_data[i+1].id;
2669  }
2670  }
2671 
2672  if (pb->eof_reached) {
2673  av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted STSC atom\n");
2674  return AVERROR_EOF;
2675  }
2676 
2677  return 0;
2678 }
2679 
2680 static inline int mov_stsc_index_valid(unsigned int index, unsigned int count)
2681 {
2682  return index < count - 1;
2683 }
2684 
2685 /* Compute the samples value for the stsc entry at the given index. */
2686 static inline int64_t mov_get_stsc_samples(MOVStreamContext *sc, unsigned int index)
2687 {
2688  int chunk_count;
2689 
2690  if (mov_stsc_index_valid(index, sc->stsc_count))
2691  chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2692  else
2693  chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2694 
2695  return sc->stsc_data[index].count * (int64_t)chunk_count;
2696 }
2697 
2698 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2699 {
2700  AVStream *st;
2701  MOVStreamContext *sc;
2702  unsigned i, entries;
2703 
2704  if (c->fc->nb_streams < 1)
2705  return 0;
2706  st = c->fc->streams[c->fc->nb_streams-1];
2707  sc = st->priv_data;
2708 
2709  avio_rb32(pb); // version + flags
2710 
2711  entries = avio_rb32(pb);
2712  if (sc->stps_data)
2713  av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2714  av_free(sc->stps_data);
2715  sc->stps_count = 0;
2716  sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2717  if (!sc->stps_data)
2718  return AVERROR(ENOMEM);
2719 
2720  for (i = 0; i < entries && !pb->eof_reached; i++) {
2721  sc->stps_data[i] = avio_rb32(pb);
2722  }
2723 
2724  sc->stps_count = i;
2725 
2726  if (pb->eof_reached) {
2727  av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted STPS atom\n");
2728  return AVERROR_EOF;
2729  }
2730 
2731  return 0;
2732 }
2733 
2734 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2735 {
2736  AVStream *st;
2737  MOVStreamContext *sc;
2738  unsigned int i, entries;
2739 
2740  if (c->fc->nb_streams < 1)
2741  return 0;
2742  st = c->fc->streams[c->fc->nb_streams-1];
2743  sc = st->priv_data;
2744 
2745  avio_r8(pb); /* version */
2746  avio_rb24(pb); /* flags */
2747 
2748  entries = avio_rb32(pb);
2749 
2750  av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %u\n", entries);
2751 
2752  if (!entries)
2753  {
2754  sc->keyframe_absent = 1;
2755  if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2756  st->need_parsing = AVSTREAM_PARSE_HEADERS;
2757  return 0;
2758  }
2759  if (sc->keyframes)
2760  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2761  if (entries >= UINT_MAX / sizeof(int))
2762  return AVERROR_INVALIDDATA;
2763  av_freep(&sc->keyframes);
2764  sc->keyframe_count = 0;
2765  sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2766  if (!sc->keyframes)
2767  return AVERROR(ENOMEM);
2768 
2769  for (i = 0; i < entries && !pb->eof_reached; i++) {
2770  sc->keyframes[i] = avio_rb32(pb);
2771  }
2772 
2773  sc->keyframe_count = i;
2774 
2775  if (pb->eof_reached) {
2776  av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted STSS atom\n");
2777  return AVERROR_EOF;
2778  }
2779 
2780  return 0;
2781 }
2782 
2783 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2784 {
2785  AVStream *st;
2786  MOVStreamContext *sc;
2787  unsigned int i, entries, sample_size, field_size, num_bytes;
2788  GetBitContext gb;
2789  unsigned char* buf;
2790  int ret;
2791 
2792  if (c->fc->nb_streams < 1)
2793  return 0;
2794  st = c->fc->streams[c->fc->nb_streams-1];
2795  sc = st->priv_data;
2796 
2797  avio_r8(pb); /* version */
2798  avio_rb24(pb); /* flags */
2799 
2800  if (atom.type == MKTAG('s','t','s','z')) {
2801  sample_size = avio_rb32(pb);
2802  if (!sc->sample_size) /* do not overwrite value computed in stsd */
2803  sc->sample_size = sample_size;
2804  sc->stsz_sample_size = sample_size;
2805  field_size = 32;
2806  } else {
2807  sample_size = 0;
2808  avio_rb24(pb); /* reserved */
2809  field_size = avio_r8(pb);
2810  }
2811  entries = avio_rb32(pb);
2812 
2813  av_log(c->fc, AV_LOG_TRACE, "sample_size = %u sample_count = %u\n", sc->sample_size, entries);
2814 
2815  sc->sample_count = entries;
2816  if (sample_size)
2817  return 0;
2818 
2819  if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2820  av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %u\n", field_size);
2821  return AVERROR_INVALIDDATA;
2822  }
2823 
2824  if (!entries)
2825  return 0;
2826  if (entries >= (UINT_MAX - 4) / field_size)
2827  return AVERROR_INVALIDDATA;
2828  if (sc->sample_sizes)
2829  av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2830  av_free(sc->sample_sizes);
2831  sc->sample_count = 0;
2832  sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2833  if (!sc->sample_sizes)
2834  return AVERROR(ENOMEM);
2835 
2836  num_bytes = (entries*field_size+4)>>3;
2837 
2838  buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2839  if (!buf) {
2840  av_freep(&sc->sample_sizes);
2841  return AVERROR(ENOMEM);
2842  }
2843 
2844  ret = ffio_read_size(pb, buf, num_bytes);
2845  if (ret < 0) {
2846  av_freep(&sc->sample_sizes);
2847  av_free(buf);
2848  av_log(c->fc, AV_LOG_WARNING, "STSZ atom truncated\n");
2849  return 0;
2850  }
2851 
2852  init_get_bits(&gb, buf, 8*num_bytes);
2853 
2854  for (i = 0; i < entries && !pb->eof_reached; i++) {
2855  sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2856  sc->data_size += sc->sample_sizes[i];
2857  }
2858 
2859  sc->sample_count = i;
2860 
2861  av_free(buf);
2862 
2863  if (pb->eof_reached) {
2864  av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted STSZ atom\n");
2865  return AVERROR_EOF;
2866  }
2867 
2868  return 0;
2869 }
2870 
2871 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2872 {
2873  AVStream *st;
2874  MOVStreamContext *sc;
2875  unsigned int i, entries, alloc_size = 0;
2876  int64_t duration=0;
2877  int64_t total_sample_count=0;
2878 
2879  if (c->fc->nb_streams < 1)
2880  return 0;
2881  st = c->fc->streams[c->fc->nb_streams-1];
2882  sc = st->priv_data;
2883 
2884  avio_r8(pb); /* version */
2885  avio_rb24(pb); /* flags */
2886  entries = avio_rb32(pb);
2887 
2888  av_log(c->fc, AV_LOG_TRACE, "track[%u].stts.entries = %u\n",
2889  c->fc->nb_streams-1, entries);
2890 
2891  if (sc->stts_data)
2892  av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2893  av_freep(&sc->stts_data);
2894  sc->stts_count = 0;
2895  if (entries >= INT_MAX / sizeof(*sc->stts_data))
2896  return AVERROR(ENOMEM);
2897 
2898  for (i = 0; i < entries && !pb->eof_reached; i++) {
2899  int sample_duration;
2900  unsigned int sample_count;
2901  unsigned int min_entries = FFMIN(FFMAX(i + 1, 1024 * 1024), entries);
2902  MOVStts *stts_data = av_fast_realloc(sc->stts_data, &alloc_size,
2903  min_entries * sizeof(*sc->stts_data));
2904  if (!stts_data) {
2905  av_freep(&sc->stts_data);
2906  sc->stts_count = 0;
2907  return AVERROR(ENOMEM);
2908  }
2909  sc->stts_count = min_entries;
2910  sc->stts_data = stts_data;
2911 
2912  sample_count=avio_rb32(pb);
2913  sample_duration = avio_rb32(pb);
2914 
2915  sc->stts_data[i].count= sample_count;
2916  sc->stts_data[i].duration= sample_duration;
2917 
2918  av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2919  sample_count, sample_duration);
2920 
2921  if ( i+1 == entries
2922  && i
2923  && sample_count == 1
2924  && total_sample_count > 100
2925  && sample_duration/10 > duration / total_sample_count)
2926  sample_duration = duration / total_sample_count;
2927  duration+=(int64_t)sample_duration*(uint64_t)sample_count;
2928  total_sample_count+=sample_count;
2929  }
2930 
2931  sc->stts_count = i;
2932 
2933  if (duration > 0 &&
2934  duration <= INT64_MAX - sc->duration_for_fps &&
2935  total_sample_count <= INT64_MAX - sc->nb_frames_for_fps
2936  ) {
2937  sc->duration_for_fps += duration;
2938  sc->nb_frames_for_fps += total_sample_count;
2939  }
2940 
2941  if (pb->eof_reached) {
2942  av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted STTS atom\n");
2943  return AVERROR_EOF;
2944  }
2945 
2946  st->nb_frames= total_sample_count;
2947  if (duration)
2948  st->duration= FFMIN(st->duration, duration);
2949  sc->track_end = duration;
2950  return 0;
2951 }
2952 
2953 static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
2954 {
2955  if (duration < 0) {
2956  if (duration == INT_MIN) {
2957  av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2958  duration++;
2959  }
2960  sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2961  }
2962 }
2963 
2964 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2965 {
2966  AVStream *st;
2967  MOVStreamContext *sc;
2968  unsigned int i, entries, ctts_count = 0;
2969 
2970  if (c->fc->nb_streams < 1)
2971  return 0;
2972  st = c->fc->streams[c->fc->nb_streams-1];
2973  sc = st->priv_data;
2974 
2975  avio_r8(pb); /* version */
2976  avio_rb24(pb); /* flags */
2977  entries = avio_rb32(pb);
2978 
2979  av_log(c->fc, AV_LOG_TRACE, "track[%u].ctts.entries = %u\n", c->fc->nb_streams - 1, entries);
2980 
2981  if (!entries)
2982  return 0;
2983  if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2984  return AVERROR_INVALIDDATA;
2985  av_freep(&sc->ctts_data);
2986  sc->ctts_data = av_fast_realloc(NULL, &sc->ctts_allocated_size, entries * sizeof(*sc->ctts_data));
2987  if (!sc->ctts_data)
2988  return AVERROR(ENOMEM);
2989 
2990  for (i = 0; i < entries && !pb->eof_reached; i++) {
2991  int count =avio_rb32(pb);
2992  int duration =avio_rb32(pb);
2993 
2994  if (count <= 0) {
2995  av_log(c->fc, AV_LOG_TRACE,
2996  "ignoring CTTS entry with count=%d duration=%d\n",
2997  count, duration);
2998  continue;
2999  }
3000 
3001  add_ctts_entry(&sc->ctts_data, &ctts_count, &sc->ctts_allocated_size,
3002  count, duration);
3003 
3004  av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
3005  count, duration);
3006 
3007  if (FFNABS(duration) < -(1<<28) && i+2<entries) {
3008  av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
3009  av_freep(&sc->ctts_data);
3010  sc->ctts_count = 0;
3011  return 0;
3012  }
3013 
3014  if (i+2<entries)
3015  mov_update_dts_shift(sc, duration);
3016  }
3017 
3018  sc->ctts_count = ctts_count;
3019 
3020  if (pb->eof_reached) {
3021  av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted CTTS atom\n");
3022  return AVERROR_EOF;
3023  }
3024 
3025  av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
3026 
3027  return 0;
3028 }
3029 
3030 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3031 {
3032  AVStream *st;
3033  MOVStreamContext *sc;
3034  unsigned int i, entries;
3035  uint8_t version;
3036  uint32_t grouping_type;
3037 
3038  if (c->fc->nb_streams < 1)
3039  return 0;
3040  st = c->fc->streams[c->fc->nb_streams-1];
3041  sc = st->priv_data;
3042 
3043  version = avio_r8(pb); /* version */
3044  avio_rb24(pb); /* flags */
3045  grouping_type = avio_rl32(pb);
3046  if (grouping_type != MKTAG( 'r','a','p',' '))
3047  return 0; /* only support 'rap ' grouping */
3048  if (version == 1)
3049  avio_rb32(pb); /* grouping_type_parameter */
3050 
3051  entries = avio_rb32(pb);
3052  if (!entries)
3053  return 0;
3054  if (sc->rap_group)
3055  av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
3056  av_free(sc->rap_group);
3057  sc->rap_group_count = 0;
3058  sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
3059  if (!sc->rap_group)
3060  return AVERROR(ENOMEM);
3061 
3062  for (i = 0; i < entries && !pb->eof_reached; i++) {
3063  sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
3064  sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
3065  }
3066 
3067  sc->rap_group_count = i;
3068 
3069  if (pb->eof_reached) {
3070  av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted SBGP atom\n");
3071  return AVERROR_EOF;
3072  }
3073 
3074  return 0;
3075 }
3076 
3077 /**
3078  * Get ith edit list entry (media time, duration).
3079  */
3080 static int get_edit_list_entry(MOVContext *mov,
3081  const MOVStreamContext *msc,
3082  unsigned int edit_list_index,
3083  int64_t *edit_list_media_time,
3084  int64_t *edit_list_duration,
3085  int64_t global_timescale)
3086 {
3087  if (edit_list_index == msc->elst_count) {
3088  return 0;
3089  }
3090  *edit_list_media_time = msc->elst_data[edit_list_index].time;
3091  *edit_list_duration = msc->elst_data[edit_list_index].duration;
3092 
3093  /* duration is in global timescale units;convert to msc timescale */
3094  if (global_timescale == 0) {
3095  avpriv_request_sample(mov->fc, "Support for mvhd.timescale = 0 with editlists");
3096  return 0;
3097  }
3098  *edit_list_duration = av_rescale(*edit_list_duration, msc->time_scale,
3099  global_timescale);
3100  return 1;
3101 }
3102 
3103 /**
3104  * Find the closest previous frame to the timestamp_pts, in e_old index
3105  * entries. Searching for just any frame / just key frames can be controlled by
3106  * last argument 'flag'.
3107  * Note that if ctts_data is not NULL, we will always search for a key frame
3108  * irrespective of the value of 'flag'. If we don't find any keyframe, we will
3109  * return the first frame of the video.
3110  *
3111  * Here the timestamp_pts is considered to be a presentation timestamp and
3112  * the timestamp of index entries are considered to be decoding timestamps.
3113  *
3114  * Returns 0 if successful in finding a frame, else returns -1.
3115  * Places the found index corresponding output arg.
3116  *
3117  * If ctts_old is not NULL, then refines the searched entry by searching
3118  * backwards from the found timestamp, to find the frame with correct PTS.
3119  *
3120  * Places the found ctts_index and ctts_sample in corresponding output args.
3121  */
3122 static int find_prev_closest_index(AVStream *st,
3123  AVIndexEntry *e_old,
3124  int nb_old,
3125  MOVStts* ctts_data,
3126  int64_t ctts_count,
3127  int64_t timestamp_pts,
3128  int flag,
3129  int64_t* index,
3130  int64_t* ctts_index,
3131  int64_t* ctts_sample)
3132 {
3133  MOVStreamContext *msc = st->priv_data;
3134  AVIndexEntry *e_keep = st->index_entries;
3135  int nb_keep = st->nb_index_entries;
3136  int64_t i = 0;
3137  int64_t index_ctts_count;
3138 
3139  av_assert0(index);
3140 
3141  // If dts_shift > 0, then all the index timestamps will have to be offset by
3142  // at least dts_shift amount to obtain PTS.
3143  // Hence we decrement the searched timestamp_pts by dts_shift to find the closest index element.
3144  if (msc->dts_shift > 0) {
3145  timestamp_pts -= msc->dts_shift;
3146  }
3147 
3148  st->index_entries = e_old;
3149  st->nb_index_entries = nb_old;
3150  *index = av_index_search_timestamp(st, timestamp_pts, flag | AVSEEK_FLAG_BACKWARD);
3151 
3152  // Keep going backwards in the index entries until the timestamp is the same.
3153  if (*index >= 0) {
3154  for (i = *index; i > 0 && e_old[i].timestamp == e_old[i - 1].timestamp;
3155  i--) {
3156  if ((flag & AVSEEK_FLAG_ANY) ||
3157  (e_old[i - 1].flags & AVINDEX_KEYFRAME)) {
3158  *index = i - 1;
3159  }
3160  }
3161  }
3162 
3163  // If we have CTTS then refine the search, by searching backwards over PTS
3164  // computed by adding corresponding CTTS durations to index timestamps.
3165  if (ctts_data && *index >= 0) {
3166  av_assert0(ctts_index);
3167  av_assert0(ctts_sample);
3168  // Find out the ctts_index for the found frame.
3169  *ctts_index = 0;
3170  *ctts_sample = 0;
3171  for (index_ctts_count = 0; index_ctts_count < *index; index_ctts_count++) {
3172  if (*ctts_index < ctts_count) {
3173  (*ctts_sample)++;
3174  if (ctts_data[*ctts_index].count == *ctts_sample) {
3175  (*ctts_index)++;
3176  *ctts_sample = 0;
3177  }
3178  }
3179  }
3180 
3181  while (*index >= 0 && (*ctts_index) >= 0 && (*ctts_index) < ctts_count) {
3182  // Find a "key frame" with PTS <= timestamp_pts (So that we can decode B-frames correctly).
3183  // No need to add dts_shift to the timestamp here becase timestamp_pts has already been
3184  // compensated by dts_shift above.
3185  if ((e_old[*index].timestamp + ctts_data[*ctts_index].duration) <= timestamp_pts &&
3186  (e_old[*index].flags & AVINDEX_KEYFRAME)) {
3187  break;
3188  }
3189 
3190  (*index)--;
3191  if (*ctts_sample == 0) {
3192  (*ctts_index)--;
3193  if (*ctts_index >= 0)
3194  *ctts_sample = ctts_data[*ctts_index].count - 1;
3195  } else {
3196  (*ctts_sample)--;
3197  }
3198  }
3199  }
3200 
3201  /* restore AVStream state*/
3202  st->index_entries = e_keep;
3203  st->nb_index_entries = nb_keep;
3204  return *index >= 0 ? 0 : -1;
3205 }
3206 
3207 /**
3208  * Add index entry with the given values, to the end of st->index_entries.
3209  * Returns the new size st->index_entries if successful, else returns -1.
3210  *
3211  * This function is similar to ff_add_index_entry in libavformat/utils.c
3212  * except that here we are always unconditionally adding an index entry to
3213  * the end, instead of searching the entries list and skipping the add if
3214  * there is an existing entry with the same timestamp.
3215  * This is needed because the mov_fix_index calls this func with the same
3216  * unincremented timestamp for successive discarded frames.
3217  */
3218 static int64_t add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
3219  int size, int distance, int flags)
3220 {
3221  AVIndexEntry *entries, *ie;
3222  int64_t index = -1;
3223  const size_t min_size_needed = (st->nb_index_entries + 1) * sizeof(AVIndexEntry);
3224 
3225  // Double the allocation each time, to lower memory fragmentation.
3226  // Another difference from ff_add_index_entry function.
3227  const size_t requested_size =
3228  min_size_needed > st->index_entries_allocated_size ?
3229  FFMAX(min_size_needed, 2 * st->index_entries_allocated_size) :
3230  min_size_needed;
3231 
3232  if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
3233  return -1;
3234 
3235  entries = av_fast_realloc(st->index_entries,
3236  &st->index_entries_allocated_size,
3237  requested_size);
3238  if(!entries)
3239  return -1;
3240 
3241  st->index_entries= entries;
3242 
3243  index= st->nb_index_entries++;
3244  ie= &entries[index];
3245 
3246  ie->pos = pos;
3247  ie->timestamp = timestamp;
3248  ie->min_distance= distance;
3249  ie->size= size;
3250  ie->flags = flags;
3251  return index;
3252 }
3253 
3254 /**
3255  * Rewrite timestamps of index entries in the range [end_index - frame_duration_buffer_size, end_index)
3256  * by subtracting end_ts successively by the amounts given in frame_duration_buffer.
3257  */
3258 static void fix_index_entry_timestamps(AVStream* st, int end_index, int64_t end_ts,
3259  int64_t* frame_duration_buffer,
3260  int frame_duration_buffer_size) {
3261  int i = 0;
3262  av_assert0(end_index >= 0 && end_index <= st->nb_index_entries);
3263  for (i = 0; i < frame_duration_buffer_size; i++) {
3264  end_ts -= frame_duration_buffer[frame_duration_buffer_size - 1 - i];
3265  st->index_entries[end_index - 1 - i].timestamp = end_ts;
3266  }
3267 }
3268 
3269 /**
3270  * Append a new ctts entry to ctts_data.
3271  * Returns the new ctts_count if successful, else returns -1.
3272  */
3273 static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
3274  int count, int duration)
3275 {
3276  MOVStts *ctts_buf_new;
3277  const size_t min_size_needed = (*ctts_count + 1) * sizeof(MOVStts);
3278  const size_t requested_size =
3279  min_size_needed > *allocated_size ?
3280  FFMAX(min_size_needed, 2 * (*allocated_size)) :
3281  min_size_needed;
3282 
3283  if((unsigned)(*ctts_count) >= UINT_MAX / sizeof(MOVStts) - 1)
3284  return -1;
3285 
3286  ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);
3287 
3288  if(!ctts_buf_new)
3289  return -1;
3290 
3291  *ctts_data = ctts_buf_new;
3292 
3293  ctts_buf_new[*ctts_count].count = count;
3294  ctts_buf_new[*ctts_count].duration = duration;
3295 
3296  *ctts_count = (*ctts_count) + 1;
3297  return *ctts_count;
3298 }
3299 
3300 #define MAX_REORDER_DELAY 16
3301 static void mov_estimate_video_delay(MOVContext *c, AVStream* st) {
3302  MOVStreamContext *msc = st->priv_data;
3303  int ind;
3304  int ctts_ind = 0;
3305  int ctts_sample = 0;
3306  int64_t pts_buf[MAX_REORDER_DELAY + 1]; // Circular buffer to sort pts.
3307  int buf_start = 0;
3308  int j, r, num_swaps;
3309 
3310  for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
3311  pts_buf[j] = INT64_MIN;
3312 
3313  if (st->codecpar->video_delay <= 0 && msc->ctts_data &&
3314  st->codecpar->codec_id == AV_CODEC_ID_H264) {
3315  st->codecpar->video_delay = 0;
3316  for(ind = 0; ind < st->nb_index_entries && ctts_ind < msc->ctts_count; ++ind) {
3317  // Point j to the last elem of the buffer and insert the current pts there.
3318  j = buf_start;
3319  buf_start = (buf_start + 1);
3320  if (buf_start == MAX_REORDER_DELAY + 1)
3321  buf_start = 0;
3322 
3323  pts_buf[j] = st->index_entries[ind].timestamp + msc->ctts_data[ctts_ind].duration;
3324 
3325  // The timestamps that are already in the sorted buffer, and are greater than the
3326  // current pts, are exactly the timestamps that need to be buffered to output PTS
3327  // in correct sorted order.
3328  // Hence the video delay (which is the buffer size used to sort DTS and output PTS),
3329  // can be computed as the maximum no. of swaps any particular timestamp needs to
3330  // go through, to keep this buffer in sorted order.
3331  num_swaps = 0;
3332  while (j != buf_start) {
3333  r = j - 1;
3334  if (r < 0) r = MAX_REORDER_DELAY;
3335  if (pts_buf[j] < pts_buf[r]) {
3336  FFSWAP(int64_t, pts_buf[j], pts_buf[r]);
3337  ++num_swaps;
3338  } else {
3339  break;
3340  }
3341  j = r;
3342  }
3343  st->codecpar->video_delay = FFMAX(st->codecpar->video_delay, num_swaps);
3344 
3345  ctts_sample++;
3346  if (ctts_sample == msc->ctts_data[ctts_ind].count) {
3347  ctts_ind++;
3348  ctts_sample = 0;
3349  }
3350  }
3351  av_log(c->fc, AV_LOG_DEBUG, "Setting codecpar->delay to %d for stream st: %d\n",
3352  st->codecpar->video_delay, st->index);
3353  }
3354 }
3355 
3356 static void mov_current_sample_inc(MOVStreamContext *sc)
3357 {
3358  sc->current_sample++;
3359  sc->current_index++;
3360  if (sc->index_ranges &&
3361  sc->current_index >= sc->current_index_range->end &&
3362  sc->current_index_range->end) {
3363  sc->current_index_range++;
3364  sc->current_index = sc->current_index_range->start;
3365  }
3366 }
3367 
3368 static void mov_current_sample_dec(MOVStreamContext *sc)
3369 {
3370  sc->current_sample--;
3371  sc->current_index--;
3372  if (sc->index_ranges &&
3373  sc->current_index < sc->current_index_range->start &&
3374  sc->current_index_range > sc->index_ranges) {
3375  sc->current_index_range--;
3376  sc->current_index = sc->current_index_range->end - 1;
3377  }
3378 }
3379 
3380 static void mov_current_sample_set(MOVStreamContext *sc, int current_sample)
3381 {
3382  int64_t range_size;
3383 
3384  sc->current_sample = current_sample;
3385  sc->current_index = current_sample;
3386  if (!sc->index_ranges) {
3387  return;
3388  }
3389 
3390  for (sc->current_index_range = sc->index_ranges;
3391  sc->current_index_range->end;
3392  sc->current_index_range++) {
3393  range_size = sc->current_index_range->end - sc->current_index_range->start;
3394  if (range_size > current_sample) {
3395  sc->current_index = sc->current_index_range->start + current_sample;
3396  break;
3397  }
3398  current_sample -= range_size;
3399  }
3400 }
3401 
3402 /**
3403  * Fix st->index_entries, so that it contains only the entries (and the entries
3404  * which are needed to decode them) that fall in the edit list time ranges.
3405  * Also fixes the timestamps of the index entries to match the timeline
3406  * specified the edit lists.
3407  */
3408 static void mov_fix_index(MOVContext *mov, AVStream *st)
3409 {
3410  MOVStreamContext *msc = st->priv_data;
3411  AVIndexEntry *e_old = st->index_entries;
3412  int nb_old = st->nb_index_entries;
3413  const AVIndexEntry *e_old_end = e_old + nb_old;
3414  const AVIndexEntry *current = NULL;
3415  MOVStts *ctts_data_old = msc->ctts_data;
3416  int64_t ctts_index_old = 0;
3417  int64_t ctts_sample_old = 0;
3418  int64_t ctts_count_old = msc->ctts_count;
3419  int64_t edit_list_media_time = 0;
3420  int64_t edit_list_duration = 0;
3421  int64_t frame_duration = 0;
3422  int64_t edit_list_dts_counter = 0;
3423  int64_t edit_list_dts_entry_end = 0;
3424  int64_t edit_list_start_ctts_sample = 0;
3425  int64_t curr_cts;
3426  int64_t curr_ctts = 0;
3427  int64_t empty_edits_sum_duration = 0;
3428  int64_t edit_list_index = 0;
3429  int64_t index;
3430  int flags;
3431  int64_t start_dts = 0;
3432  int64_t edit_list_start_encountered = 0;
3433  int64_t search_timestamp = 0;
3434  int64_t* frame_duration_buffer = NULL;
3435  int num_discarded_begin = 0;
3436  int first_non_zero_audio_edit = -1;
3437  int packet_skip_samples = 0;
3438  MOVIndexRange *current_index_range;
3439  int i;
3440  int found_keyframe_after_edit = 0;
3441 
3442  if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
3443  return;
3444  }
3445 
3446  // allocate the index ranges array
3447  msc->index_ranges = av_malloc((msc->elst_count + 1) * sizeof(msc->index_ranges[0]));
3448  if (!msc->index_ranges) {
3449  av_log(mov->fc, AV_LOG_ERROR, "Cannot allocate index ranges buffer\n");
3450  return;
3451  }
3452  msc->current_index_range = msc->index_ranges;
3453  current_index_range = msc->index_ranges - 1;
3454 
3455  // Clean AVStream from traces of old index
3456  st->index_entries = NULL;
3457  st->index_entries_allocated_size = 0;
3458  st->nb_index_entries = 0;
3459 
3460  // Clean ctts fields of MOVStreamContext
3461  msc->ctts_data = NULL;
3462  msc->ctts_count = 0;
3463  msc->ctts_index = 0;
3464  msc->ctts_sample = 0;
3465  msc->ctts_allocated_size = 0;
3466 
3467  // Reinitialize min_corrected_pts so that it can be computed again.
3468  msc->min_corrected_pts = -1;
3469 
3470  // If the dts_shift is positive (in case of negative ctts values in mov),
3471  // then negate the DTS by dts_shift
3472  if (msc->dts_shift > 0) {
3473  edit_list_dts_entry_end -= msc->dts_shift;
3474  av_log(mov->fc, AV_LOG_DEBUG, "Shifting DTS by %d because of negative CTTS.\n", msc->dts_shift);
3475  }
3476 
3477  start_dts = edit_list_dts_entry_end;
3478 
3479  while (get_edit_list_entry(mov, msc, edit_list_index, &edit_list_media_time,
3480  &edit_list_duration, mov->time_scale)) {
3481  av_log(mov->fc, AV_LOG_DEBUG, "Processing st: %d, edit list %"PRId64" - media time: %"PRId64", duration: %"PRId64"\n",
3482  st->index, edit_list_index, edit_list_media_time, edit_list_duration);
3483  edit_list_index++;
3484  edit_list_dts_counter = edit_list_dts_entry_end;
3485  edit_list_dts_entry_end += edit_list_duration;
3486  num_discarded_begin = 0;
3487  if (edit_list_media_time == -1) {
3488  empty_edits_sum_duration += edit_list_duration;
3489  continue;
3490  }
3491 
3492  // If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
3493  // according to the edit list below.
3494  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3495  if (first_non_zero_audio_edit < 0) {
3496  first_non_zero_audio_edit = 1;
3497  } else {
3498  first_non_zero_audio_edit = 0;
3499  }
3500 
3501  if (first_non_zero_audio_edit > 0)
3502  st->skip_samples = msc->start_pad = 0;
3503  }
3504 
3505  // While reordering frame index according to edit list we must handle properly
3506  // the scenario when edit list entry starts from none key frame.
3507  // We find closest previous key frame and preserve it and consequent frames in index.
3508  // All frames which are outside edit list entry time boundaries will be dropped after decoding.
3509  search_timestamp = edit_list_media_time;
3510  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3511  // Audio decoders like AAC need need a decoder delay samples previous to the current sample,
3512  // to correctly decode this frame. Hence for audio we seek to a frame 1 sec. before the
3513  // edit_list_media_time to cover the decoder delay.
3514  search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
3515  }
3516 
3517  if (find_prev_closest_index(st, e_old, nb_old, ctts_data_old, ctts_count_old, search_timestamp, 0,
3518  &index, &ctts_index_old, &ctts_sample_old) < 0) {
3519  av_log(mov->fc, AV_LOG_WARNING,
3520  "st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
3521  st->index, edit_list_index, search_timestamp);
3522  if (find_prev_closest_index(st, e_old, nb_old, ctts_data_old, ctts_count_old, search_timestamp, AVSEEK_FLAG_ANY,
3523  &index, &ctts_index_old, &ctts_sample_old) < 0) {
3524  av_log(mov->fc, AV_LOG_WARNING,
3525  "st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n",
3526  st->index, edit_list_index, search_timestamp);
3527  index = 0;
3528  ctts_index_old = 0;
3529  ctts_sample_old = 0;
3530  }
3531  }
3532  current = e_old + index;
3533  edit_list_start_ctts_sample = ctts_sample_old;
3534 
3535  // Iterate over index and arrange it according to edit list
3536  edit_list_start_encountered = 0;
3537  found_keyframe_after_edit = 0;
3538  for (; current < e_old_end; current++, index++) {
3539  // check if frame outside edit list mark it for discard
3540  frame_duration = (current + 1 < e_old_end) ?
3541  ((current + 1)->timestamp - current->timestamp) : edit_list_duration;
3542 
3543  flags = current->flags;
3544 
3545  // frames (pts) before or after edit list
3546  curr_cts = current->timestamp + msc->dts_shift;
3547  curr_ctts = 0;
3548 
3549  if (ctts_data_old && ctts_index_old < ctts_count_old) {
3550  curr_ctts = ctts_data_old[ctts_index_old].duration;
3551  av_log(mov->fc, AV_LOG_DEBUG, "stts: %"PRId64" ctts: %"PRId64", ctts_index: %"PRId64", ctts_count: %"PRId64"\n",
3552  curr_cts, curr_ctts, ctts_index_old, ctts_count_old);
3553  curr_cts += curr_ctts;
3554  ctts_sample_old++;
3555  if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
3556  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3557  &msc->ctts_allocated_size,
3558  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3559  ctts_data_old[ctts_index_old].duration) == -1) {
3560  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3561  ctts_index_old,
3562  ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3563  ctts_data_old[ctts_index_old].duration);
3564  break;
3565  }
3566  ctts_index_old++;
3567  ctts_sample_old = 0;
3568  edit_list_start_ctts_sample = 0;
3569  }
3570  }
3571 
3572  if (curr_cts < edit_list_media_time || curr_cts >= (edit_list_duration + edit_list_media_time)) {
3573  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->codec_id != AV_CODEC_ID_VORBIS &&
3574  curr_cts < edit_list_media_time && curr_cts + frame_duration > edit_list_media_time &&
3575  first_non_zero_audio_edit > 0) {
3576  packet_skip_samples = edit_list_media_time - curr_cts;
3577  st->skip_samples += packet_skip_samples;
3578 
3579  // Shift the index entry timestamp by packet_skip_samples to be correct.
3580  edit_list_dts_counter -= packet_skip_samples;
3581  if (edit_list_start_encountered == 0) {
3582  edit_list_start_encountered = 1;
3583  // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3584  // discarded packets.
3585  if (frame_duration_buffer) {
3586  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3587  frame_duration_buffer, num_discarded_begin);
3588  av_freep(&frame_duration_buffer);
3589  }
3590  }
3591 
3592  av_log(mov->fc, AV_LOG_DEBUG, "skip %d audio samples from curr_cts: %"PRId64"\n", packet_skip_samples, curr_cts);
3593  } else {
3594  flags |= AVINDEX_DISCARD_FRAME;
3595  av_log(mov->fc, AV_LOG_DEBUG, "drop a frame at curr_cts: %"PRId64" @ %"PRId64"\n", curr_cts, index);
3596 
3597  if (edit_list_start_encountered == 0) {
3598  num_discarded_begin++;
3599  frame_duration_buffer = av_realloc(frame_duration_buffer,
3600  num_discarded_begin * sizeof(int64_t));
3601  if (!frame_duration_buffer) {
3602  av_log(mov->fc, AV_LOG_ERROR, "Cannot reallocate frame duration buffer\n");
3603  break;
3604  }
3605  frame_duration_buffer[num_discarded_begin - 1] = frame_duration;
3606 
3607  // Increment skip_samples for the first non-zero audio edit list
3608  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3609  first_non_zero_audio_edit > 0 && st->codecpar->codec_id != AV_CODEC_ID_VORBIS) {
3610  st->skip_samples += frame_duration;
3611  }
3612  }
3613  }
3614  } else {
3615  if (msc->min_corrected_pts < 0) {
3616  msc->min_corrected_pts = edit_list_dts_counter + curr_ctts + msc->dts_shift;
3617  } else {
3618  msc->min_corrected_pts = FFMIN(msc->min_corrected_pts, edit_list_dts_counter + curr_ctts + msc->dts_shift);
3619  }
3620  if (edit_list_start_encountered == 0) {
3621  edit_list_start_encountered = 1;
3622  // Make timestamps strictly monotonically increasing by rewriting timestamps for
3623  // discarded packets.
3624  if (frame_duration_buffer) {
3625  fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3626  frame_duration_buffer, num_discarded_begin);
3627  av_freep(&frame_duration_buffer);
3628  }
3629  }
3630  }
3631 
3632  if (add_index_entry(st, current->pos, edit_list_dts_counter, current->size,
3633  current->min_distance, flags) == -1) {
3634  av_log(mov->fc, AV_LOG_ERROR, "Cannot add index entry\n");
3635  break;
3636  }
3637 
3638  // Update the index ranges array
3639  if (current_index_range < msc->index_ranges || index != current_index_range->end) {
3640  current_index_range++;
3641  current_index_range->start = index;
3642  }
3643  current_index_range->end = index + 1;
3644 
3645  // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list.
3646  if (edit_list_start_encountered > 0) {
3647  edit_list_dts_counter = edit_list_dts_counter + frame_duration;
3648  }
3649 
3650  // Break when found first key frame after edit entry completion
3651  if ((curr_cts + frame_duration >= (edit_list_duration + edit_list_media_time)) &&
3652  ((flags & AVINDEX_KEYFRAME) || ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)))) {
3653  if (ctts_data_old) {
3654  // If we have CTTS and this is the first keyframe after edit elist,
3655  // wait for one more, because there might be trailing B-frames after this I-frame
3656  // that do belong to the edit.
3657  if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO && found_keyframe_after_edit == 0) {
3658  found_keyframe_after_edit = 1;
3659  continue;
3660  }
3661  if (ctts_sample_old != 0) {
3662  if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3663  &msc->ctts_allocated_size,
3664  ctts_sample_old - edit_list_start_ctts_sample,
3665  ctts_data_old[ctts_index_old].duration) == -1) {
3666  av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3667  ctts_index_old, ctts_sample_old - edit_list_start_ctts_sample,
3668  ctts_data_old[ctts_index_old].duration);
3669  break;
3670  }
3671  }
3672  }
3673  break;
3674  }
3675  }
3676  }
3677  // If there are empty edits, then msc->min_corrected_pts might be positive
3678  // intentionally. So we subtract the sum duration of emtpy edits here.
3679  msc->min_corrected_pts -= empty_edits_sum_duration;
3680 
3681  // If the minimum pts turns out to be greater than zero after fixing the index, then we subtract the
3682  // dts by that amount to make the first pts zero.
3683  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3684  if (msc->min_corrected_pts > 0) {
3685  av_log(mov->fc, AV_LOG_DEBUG, "Offset DTS by %"PRId64" to make first pts zero.\n", msc->min_corrected_pts);
3686  for (i = 0; i < st->nb_index_entries; ++i) {
3687  st->index_entries[i].timestamp -= msc->min_corrected_pts;
3688  }
3689  }
3690  }
3691  // Start time should be equal to zero or the duration of any empty edits.
3692  st->start_time = empty_edits_sum_duration;
3693 
3694  // Update av stream length, if it ends up shorter than the track's media duration
3695  st->duration = FFMIN(st->duration, edit_list_dts_entry_end - start_dts);
3696  msc->start_pad = st->skip_samples;
3697 
3698  // Free the old index and the old CTTS structures
3699  av_free(e_old);
3700  av_free(ctts_data_old);
3701  av_freep(&frame_duration_buffer);
3702 
3703  // Null terminate the index ranges array
3704  current_index_range++;
3705  current_index_range->start = 0;
3706  current_index_range->end = 0;
3707  msc->current_index = msc->index_ranges[0].start;
3708 }
3709 
3710 static void mov_build_index(MOVContext *mov, AVStream *st)
3711 {
3712  MOVStreamContext *sc = st->priv_data;
3713  int64_t current_offset;
3714  int64_t current_dts = 0;
3715  unsigned int stts_index = 0;
3716  unsigned int stsc_index = 0;
3717  unsigned int stss_index = 0;
3718  unsigned int stps_index = 0;
3719  unsigned int i, j;
3720  uint64_t stream_size = 0;
3721  MOVStts *ctts_data_old = sc->ctts_data;
3722  unsigned int ctts_count_old = sc->ctts_count;
3723 
3724  if (sc->elst_count) {
3725  int i, edit_start_index = 0, multiple_edits = 0;
3726  int64_t empty_duration = 0; // empty duration of the first edit list entry
3727  int64_t start_time = 0; // start time of the media
3728 
3729  for (i = 0; i < sc->elst_count; i++) {
3730  const MOVElst *e = &sc->elst_data[i];
3731  if (i == 0 && e->time == -1) {
3732  /* if empty, the first entry is the start time of the stream
3733  * relative to the presentation itself */
3734  empty_duration = e->duration;
3735  edit_start_index = 1;
3736  } else if (i == edit_start_index && e->time >= 0) {
3737  start_time = e->time;
3738  } else {
3739  multiple_edits = 1;
3740  }
3741  }
3742 
3743  if (multiple_edits && !mov->advanced_editlist)
3744  av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
3745  "Use -advanced_editlist to correctly decode otherwise "
3746  "a/v desync might occur\n");
3747 
3748  /* adjust first dts according to edit list */
3749  if ((empty_duration || start_time) && mov->time_scale > 0) {
3750  if (empty_duration)
3751  empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
3752  sc->time_offset = start_time - empty_duration;
3753  sc->min_corrected_pts = start_time;
3754  if (!mov->advanced_editlist)
3755  current_dts = -sc->time_offset;
3756  }
3757 
3758  if (!multiple_edits && !mov->advanced_editlist &&
3759  st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
3760  sc->start_pad = start_time;
3761  }
3762 
3763  /* only use old uncompressed audio chunk demuxing when stts specifies it */
3764  if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3765  sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
3766  unsigned int current_sample = 0;
3767  unsigned int stts_sample = 0;
3768  unsigned int sample_size;
3769  unsigned int distance = 0;
3770  unsigned int rap_group_index = 0;
3771  unsigned int rap_group_sample = 0;
3772  int64_t last_dts = 0;
3773  int64_t dts_correction = 0;
3774  int rap_group_present = sc->rap_group_count && sc->rap_group;
3775  int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
3776 
3777  current_dts -= sc->dts_shift;
3778  last_dts = current_dts;
3779 
3780  if (!sc->sample_count || st->nb_index_entries)
3781  return;
3782  if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3783  return;
3784  if (av_reallocp_array(&st->index_entries,
3785  st->nb_index_entries + sc->sample_count,
3786  sizeof(*st->index_entries)) < 0) {
3787  st->nb_index_entries = 0;
3788  return;
3789  }
3790  st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
3791 
3792  if (ctts_data_old) {
3793  // Expand ctts entries such that we have a 1-1 mapping with samples
3794  if (sc->sample_count >= UINT_MAX / sizeof(*sc->ctts_data))
3795  return;
3796  sc->ctts_count = 0;
3797  sc->ctts_allocated_size = 0;
3798  sc->ctts_data = av_fast_realloc(NULL, &sc->ctts_allocated_size,
3799  sc->sample_count * sizeof(*sc->ctts_data));
3800  if (!sc->ctts_data) {
3801  av_free(ctts_data_old);
3802  return;
3803  }
3804 
3805  memset((uint8_t*)(sc->ctts_data), 0, sc->ctts_allocated_size);
3806 
3807  for (i = 0; i < ctts_count_old &&
3808  sc->ctts_count < sc->sample_count; i++)
3809  for (j = 0; j < ctts_data_old[i].count &&
3810  sc->ctts_count < sc->sample_count; j++)
3811  add_ctts_entry(&sc->ctts_data, &sc->ctts_count,
3812  &sc->ctts_allocated_size, 1,
3813  ctts_data_old[i].duration);
3814  av_free(ctts_data_old);
3815  }
3816 
3817  for (i = 0; i < sc->chunk_count; i++) {
3818  int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
3819  current_offset = sc->chunk_offsets[i];
3820  while (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3821  i + 1 == sc->stsc_data[stsc_index + 1].first)
3822  stsc_index++;
3823 
3824  if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
3825  sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
3826  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
3827  sc->stsz_sample_size = sc->sample_size;
3828  }
3829  if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
3830  av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
3831  sc->stsz_sample_size = sc->sample_size;
3832  }
3833 
3834  for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
3835  int keyframe = 0;
3836  if (current_sample >= sc->sample_count) {
3837  av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
3838  return;
3839  }
3840 
3841  if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
3842  keyframe = 1;
3843  if (stss_index + 1 < sc->keyframe_count)
3844  stss_index++;
3845  } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
3846  keyframe = 1;
3847  if (stps_index + 1 < sc->stps_count)
3848  stps_index++;
3849  }
3850  if (rap_group_present && rap_group_index < sc->rap_group_count) {
3851  if (sc->rap_group[rap_group_index].index > 0)
3852  keyframe = 1;
3853  if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
3854  rap_group_sample = 0;
3855  rap_group_index++;
3856  }
3857  }
3858  if (sc->keyframe_absent
3859  && !sc->stps_count
3860  && !rap_group_present
3861  && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
3862  keyframe = 1;
3863  if (keyframe)
3864  distance = 0;
3865  sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
3866  if (sc->pseudo_stream_id == -1 ||
3867  sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
3868  AVIndexEntry *e;
3869  if (sample_size > 0x3FFFFFFF) {
3870  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
3871  return;
3872  }
3873  e = &st->index_entries[st->nb_index_entries++];
3874  e->pos = current_offset;
3875  e->timestamp = current_dts;
3876  e->size = sample_size;
3877  e->min_distance = distance;
3878  e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
3879  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
3880  "size %u, distance %u, keyframe %d\n", st->index, current_sample,
3881  current_offset, current_dts, sample_size, distance, keyframe);
3882  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
3883  ff_rfps_add_frame(mov->fc, st, current_dts);
3884  }
3885 
3886  current_offset += sample_size;
3887  stream_size += sample_size;
3888 
3889  /* A negative sample duration is invalid based on the spec,
3890  * but some samples need it to correct the DTS. */
3891  if (sc->stts_data[stts_index].duration < 0) {
3892  av_log(mov->fc, AV_LOG_WARNING,
3893  "Invalid SampleDelta %d in STTS, at %d st:%d\n",
3894  sc->stts_data[stts_index].duration, stts_index,
3895  st->index);
3896  dts_correction += sc->stts_data[stts_index].duration - 1;
3897  sc->stts_data[stts_index].duration = 1;
3898  }
3899  current_dts += sc->stts_data[stts_index].duration;
3900  if (!dts_correction || current_dts + dts_correction > last_dts) {
3901  current_dts += dts_correction;
3902  dts_correction = 0;
3903  } else {
3904  /* Avoid creating non-monotonous DTS */
3905  dts_correction += current_dts - last_dts - 1;
3906  current_dts = last_dts + 1;
3907  }
3908  last_dts = current_dts;
3909  distance++;
3910  stts_sample++;
3911  current_sample++;
3912  if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
3913  stts_sample = 0;
3914  stts_index++;
3915  }
3916  }
3917  }
3918  if (st->duration > 0)
3919  st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
3920  } else {
3921  unsigned chunk_samples, total = 0;
3922 
3923  if (!sc->chunk_count)
3924  return;
3925 
3926  // compute total chunk count
3927  for (i = 0; i < sc->stsc_count; i++) {
3928  unsigned count, chunk_count;
3929 
3930  chunk_samples = sc->stsc_data[i].count;
3931  if (i != sc->stsc_count - 1 &&
3932  sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
3933  av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
3934  return;
3935  }
3936 
3937  if (sc->samples_per_frame >= 160) { // gsm
3938  count = chunk_samples / sc->samples_per_frame;
3939  } else if (sc->samples_per_frame > 1) {
3940  unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
3941  count = (chunk_samples+samples-1) / samples;
3942  } else {
3943  count = (chunk_samples+1023) / 1024;
3944  }
3945 
3946  if (mov_stsc_index_valid(i, sc->stsc_count))
3947  chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
3948  else
3949  chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
3950  total += chunk_count * count;
3951  }
3952 
3953  av_log(mov->fc, AV_LOG_TRACE, "chunk count %u\n", total);
3954  if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3955  return;
3956  if (av_reallocp_array(&st->index_entries,
3957  st->nb_index_entries + total,
3958  sizeof(*st->index_entries)) < 0) {
3959  st->nb_index_entries = 0;
3960  return;
3961  }
3962  st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
3963 
3964  // populate index
3965  for (i = 0; i < sc->chunk_count; i++) {
3966  current_offset = sc->chunk_offsets[i];
3967  if (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3968  i + 1 == sc->stsc_data[stsc_index + 1].first)
3969  stsc_index++;
3970  chunk_samples = sc->stsc_data[stsc_index].count;
3971 
3972  while (chunk_samples > 0) {
3973  AVIndexEntry *e;
3974  unsigned size, samples;
3975 
3976  if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3977  avpriv_request_sample(mov->fc,
3978  "Zero bytes per frame, but %d samples per frame",
3979  sc->samples_per_frame);
3980  return;
3981  }
3982 
3983  if (sc->samples_per_frame >= 160) { // gsm
3984  samples = sc->samples_per_frame;
3985  size = sc->bytes_per_frame;
3986  } else {
3987  if (sc->samples_per_frame > 1) {
3988  samples = FFMIN((1024 / sc->samples_per_frame)*
3989  sc->samples_per_frame, chunk_samples);
3990  size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3991  } else {
3992  samples = FFMIN(1024, chunk_samples);
3993  size = samples * sc->sample_size;
3994  }
3995  }
3996 
3997  if (st->nb_index_entries >= total) {
3998  av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %u\n", total);
3999  return;
4000  }
4001  if (size > 0x3FFFFFFF) {
4002  av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
4003  return;
4004  }
4005  e = &st->index_entries[st->nb_index_entries++];
4006  e->pos = current_offset;
4007  e->timestamp = current_dts;
4008  e->size = size;
4009  e->min_distance = 0;
4010  e->flags = AVINDEX_KEYFRAME;
4011  av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %u, offset %"PRIx64", dts %"PRId64", "
4012  "size %u, duration %u\n", st->index, i, current_offset, current_dts,
4013  size, samples);
4014 
4015  current_offset += size;
4016  current_dts += samples;
4017  chunk_samples -= samples;
4018  }
4019  }
4020  }
4021 
4022  if (!mov->ignore_editlist && mov->advanced_editlist) {
4023  // Fix index according to edit lists.
4024  mov_fix_index(mov, st);
4025  }
4026 
4027  // Update start time of the stream.
4028  if (st->start_time == AV_NOPTS_VALUE && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries > 0) {
4029  st->start_time = st->index_entries[0].timestamp + sc->dts_shift;
4030  if (sc->ctts_data) {
4031  st->start_time += sc->ctts_data[0].duration;
4032  }
4033  }
4034 
4035  mov_estimate_video_delay(mov, st);
4036 }
4037 
4038 static int test_same_origin(const char *src, const char *ref) {
4039  char src_proto[64];
4040  char ref_proto[64];
4041  char src_auth[256];
4042  char ref_auth[256];
4043  char src_host[256];
4044  char ref_host[256];
4045  int src_port=-1;
4046  int ref_port=-1;
4047 
4048  av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
4049  av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
4050 
4051  if (strlen(src) == 0) {
4052  return -1;
4053  } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
4054  strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
4055  strlen(src_host) + 1 >= sizeof(src_host) ||
4056  strlen(ref_host) + 1 >= sizeof(ref_host)) {
4057  return 0;
4058  } else if (strcmp(src_proto, ref_proto) ||
4059  strcmp(src_auth, ref_auth) ||
4060  strcmp(src_host, ref_host) ||
4061  src_port != ref_port) {
4062  return 0;
4063  } else
4064  return 1;
4065 }
4066 
4067 static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
4068 {
4069  /* try relative path, we do not try the absolute because it can leak information about our
4070  system to an attacker */
4071  if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
4072  char filename[1025];
4073  const char *src_path;
4074  int i, l;
4075 
4076  /* find a source dir */
4077  src_path = strrchr(src, '/');
4078  if (src_path)
4079  src_path++;
4080  else
4081  src_path = src;
4082 
4083  /* find a next level down to target */
4084  for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
4085  if (ref->path[l] == '/') {
4086  if (i == ref->nlvl_to - 1)
4087  break;
4088  else
4089  i++;
4090  }
4091 
4092  /* compose filename if next level down to target was found */
4093  if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
4094  memcpy(filename, src, src_path - src);
4095  filename[src_path - src] = 0;
4096 
4097  for (i = 1; i < ref->nlvl_from; i++)
4098  av_strlcat(filename, "../", sizeof(filename));
4099 
4100  av_strlcat(filename, ref->path + l + 1, sizeof(filename));
4101  if (!c->use_absolute_path) {
4102  int same_origin = test_same_origin(src, filename);
4103 
4104  if (!same_origin) {
4105  av_log(c->fc, AV_LOG_ERROR,
4106  "Reference with mismatching origin, %s not tried for security reasons, "
4107  "set demuxer option use_absolute_path to allow it anyway\n",
4108  ref->path);
4109  return AVERROR(ENOENT);
4110  }
4111 
4112  if(strstr(ref->path + l + 1, "..") ||
4113  strstr(ref->path + l + 1, ":") ||
4114  (ref->nlvl_from > 1 && same_origin < 0) ||
4115  (filename[0] == '/' && src_path == src))
4116  return AVERROR(ENOENT);
4117  }
4118 
4119  if (strlen(filename) + 1 == sizeof(filename))
4120  return AVERROR(ENOENT);
4121  if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
4122  return 0;
4123  }
4124  } else if (c->use_absolute_path) {
4125  av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
4126  "this is a possible security issue\n");
4127  if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
4128  return 0;
4129  } else {
4130  av_log(c->fc, AV_LOG_ERROR,
4131  "Absolute path %s not tried for security reasons, "
4132  "set demuxer option use_absolute_path to allow absolute paths\n",
4133  ref->path);
4134  }
4135 
4136  return AVERROR(ENOENT);
4137 }
4138 
4139 static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
4140 {
4141  if (sc->time_scale <= 0) {
4142  av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
4143  sc->time_scale = c->time_scale;
4144  if (sc->time_scale <= 0)
4145  sc->time_scale = 1;
4146  }
4147 }
4148 
4149 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4150 {
4151  AVStream *st;
4152  MOVStreamContext *sc;
4153  int ret;
4154 
4155  st = avformat_new_stream(c->fc, NULL);
4156  if (!st) return AVERROR(ENOMEM);
4157  st->id = c->fc->nb_streams;
4158  sc = av_mallocz(sizeof(MOVStreamContext));
4159  if (!sc) return AVERROR(ENOMEM);
4160 
4161  st->priv_data = sc;
4162  st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
4163  sc->ffindex = st->index;
4164  c->trak_index = st->index;
4165 
4166  if ((ret = mov_read_default(c, pb, atom)) < 0)
4167  return ret;
4168 
4169  c->trak_index = -1;
4170 
4171  /* sanity checks */
4172  if ((sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
4173  (!sc->sample_size && !sc->sample_count))) ||
4174  (!sc->chunk_count && sc->sample_count)) {
4175  av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
4176  st->index);
4177  return 0;
4178  }
4179  if (sc->chunk_count && sc->stsc_count && sc->stsc_data[ sc->stsc_count - 1 ].first > sc->chunk_count) {
4180  av_log(c->fc, AV_LOG_ERROR, "stream %d, contradictionary STSC and STCO\n",
4181  st->index);
4182  return AVERROR_INVALIDDATA;
4183  }
4184 
4185  fix_timescale(c, sc);
4186 
4187  avpriv_set_pts_info(st, 64, 1, sc->time_scale);
4188 
4189  mov_build_index(c, st);
4190 
4191  if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
4192  MOVDref *dref = &sc->drefs[sc->dref_id - 1];
4193  if (c->enable_drefs) {
4194  if (mov_open_dref(c, &sc->pb, c->fc->url, dref) < 0)
4195  av_log(c->fc, AV_LOG_ERROR,
4196  "stream %d, error opening alias: path='%s', dir='%s', "
4197  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
4198  st->index, dref->path, dref->dir, dref->filename,
4199  dref->volume, dref->nlvl_from, dref->nlvl_to);
4200  } else {
4201  av_log(c->fc, AV_LOG_WARNING,
4202  "Skipped opening external track: "
4203  "stream %d, alias: path='%s', dir='%s', "
4204  "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
4205  "Set enable_drefs to allow this.\n",
4206  st->index, dref->path, dref->dir, dref->filename,
4207  dref->volume, dref->nlvl_from, dref->nlvl_to);
4208  }
4209  } else {
4210  sc->pb = c->fc->pb;
4211  sc->pb_is_copied = 1;
4212  }
4213 
4214  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
4215  if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
4216  sc->height && sc->width &&
4217  (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
4218  st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
4219  ((double)st->codecpar->width * sc->height), INT_MAX);
4220  }
4221 
4222 #if FF_API_R_FRAME_RATE
4223  if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
4224  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
4225  sc->time_scale, sc->stts_data[0].duration, INT_MAX);
4226 #endif
4227  }
4228 
4229  // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
4230  if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
4231  TAG_IS_AVCI(st->codecpar->codec_tag)) {
4232  ret = ff_generate_avci_extradata(st);
4233  if (ret < 0)
4234  return ret;
4235  }
4236 
4237  switch (st->codecpar->codec_id) {
4238 #if CONFIG_H261_DECODER
4239  case AV_CODEC_ID_H261:
4240 #endif
4241 #if CONFIG_H263_DECODER
4242  case AV_CODEC_ID_H263:
4243 #endif
4244 #if CONFIG_MPEG4_DECODER
4245  case AV_CODEC_ID_MPEG4:
4246 #endif
4247  st->codecpar->width = 0; /* let decoder init width/height */
4248  st->codecpar->height= 0;
4249  break;
4250  }
4251 
4252  // If the duration of the mp3 packets is not constant, then they could need a parser
4253  if (st->codecpar->codec_id == AV_CODEC_ID_MP3
4254  && sc->stts_count > 3
4255  && sc->stts_count*10 > st->nb_frames
4256  && sc->time_scale == st->codecpar->sample_rate) {
4257  st->need_parsing = AVSTREAM_PARSE_FULL;
4258  }
4259  /* Do not need those anymore. */
4260  av_freep(&sc->chunk_offsets);
4261  av_freep(&sc->sample_sizes);
4262  av_freep(&sc->keyframes);
4263  av_freep(&sc->stts_data);
4264  av_freep(&sc->stps_data);
4265  av_freep(&sc->elst_data);
4266  av_freep(&sc->rap_group);
4267 
4268  return 0;
4269 }
4270 
4271 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4272 {
4273  int ret;
4274  c->itunes_metadata = 1;
4275  ret = mov_read_default(c, pb, atom);
4276  c->itunes_metadata = 0;
4277  return ret;
4278 }
4279 
4280 static int mov_read_keys(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4281 {
4282  uint32_t count;
4283  uint32_t i;
4284 
4285  if (atom.size < 8)
4286  return 0;
4287 
4288  avio_skip(pb, 4);
4289  count = avio_rb32(pb);
4290  if (count > UINT_MAX / sizeof(*c->meta_keys) - 1) {
4291  av_log(c->fc, AV_LOG_ERROR,
4292  "The 'keys' atom with the invalid key count: %"PRIu32"\n", count);
4293  return AVERROR_INVALIDDATA;
4294  }
4295 
4296  c->meta_keys_count = count + 1;
4297  c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
4298  if (!c->meta_keys)
4299  return AVERROR(ENOMEM);
4300 
4301  for (i = 1; i <= count; ++i) {
4302  uint32_t key_size = avio_rb32(pb);
4303  uint32_t type = avio_rl32(pb);
4304  if (key_size < 8) {
4305  av_log(c->fc, AV_LOG_ERROR,
4306  "The key# %"PRIu32" in meta has invalid size:"
4307  "%"PRIu32"\n", i, key_size);
4308  return AVERROR_INVALIDDATA;
4309  }
4310  key_size -= 8;
4311  if (type != MKTAG('m','d','t','a')) {
4312  avio_skip(pb, key_size);
4313  }
4314  c->meta_keys[i] = av_mallocz(key_size + 1);
4315  if (!c->meta_keys[i])
4316  return AVERROR(ENOMEM);
4317  avio_read(pb, c->meta_keys[i], key_size);
4318  }
4319 
4320  return 0;
4321 }
4322 
4323 static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4324 {
4325  int64_t end = avio_tell(pb) + atom.size;
4326  uint8_t *key = NULL, *val = NULL, *mean = NULL;
4327  int i;
4328  int ret = 0;
4329  AVStream *st;
4330  MOVStreamContext *sc;
4331 
4332  if (c->fc->nb_streams < 1)
4333  return 0;
4334  st = c->fc->streams[c->fc->nb_streams-1];
4335  sc = st->priv_data;
4336 
4337  for (i = 0; i < 3; i++) {
4338  uint8_t **p;
4339  uint32_t len, tag;
4340 
4341  if (end - avio_tell(pb) <= 12)
4342  break;
4343 
4344  len = avio_rb32(pb);
4345  tag = avio_rl32(pb);
4346  avio_skip(pb, 4); // flags
4347 
4348  if (len < 12 || len - 12 > end - avio_tell(pb))
4349  break;
4350  len -= 12;
4351 
4352  if (tag == MKTAG('m', 'e', 'a', 'n'))
4353  p = &mean;
4354  else if (tag == MKTAG('n', 'a', 'm', 'e'))
4355  p = &key;
4356  else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
4357  avio_skip(pb, 4);
4358  len -= 4;
4359  p = &val;
4360  } else
4361  break;
4362 
4363  *p = av_malloc(len + 1);
4364  if (!*p) {
4365  ret = AVERROR(ENOMEM);
4366  break;
4367  }
4368  ret = ffio_read_size(pb, *p, len);
4369  if (ret < 0) {
4370  av_freep(p);
4371  break;
4372  }
4373  (*p)[len] = 0;
4374  }
4375 
4376  if (mean && key && val) {
4377  if (strcmp(key, "iTunSMPB") == 0) {
4378  int priming, remainder, samples;
4379  if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
4380  if(priming>0 && priming<16384)
4381  sc->start_pad = priming;
4382  }
4383  }
4384  if (strcmp(key, "cdec") != 0) {
4385  av_dict_set(&c->fc->metadata, key, val,
4386  AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
4387  key = val = NULL;
4388  }
4389  } else {
4390  av_log(c->fc, AV_LOG_VERBOSE,
4391  "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
4392  }
4393 
4394  avio_seek(pb, end, SEEK_SET);
4395  av_freep(&key);
4396  av_freep(&val);
4397  av_freep(&mean);
4398  return ret;
4399 }
4400 
4401 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4402 {
4403  while (atom.size > 8) {
4404  uint32_t tag = avio_rl32(pb);
4405  atom.size -= 4;
4406  if (tag == MKTAG('h','d','l','r')) {
4407  avio_seek(pb, -8, SEEK_CUR);
4408  atom.size += 8;
4409  return mov_read_default(c, pb, atom);
4410  }
4411  }
4412  return 0;
4413 }
4414 
4415 // return 1 when matrix is identity, 0 otherwise
4416 #define IS_MATRIX_IDENT(matrix) \
4417  ( (matrix)[0][0] == (1 << 16) && \
4418  (matrix)[1][1] == (1 << 16) && \
4419  (matrix)[2][2] == (1 << 30) && \
4420  !(matrix)[0][1] && !(matrix)[0][2] && \
4421  !(matrix)[1][0] && !(matrix)[1][2] && \
4422  !(matrix)[2][0] && !(matrix)[2][1])
4423 
4424 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4425 {
4426  int i, j, e;
4427  int width;
4428  int height;
4429  int display_matrix[3][3];
4430  int res_display_matrix[3][3] = { { 0 } };
4431  AVStream *st;
4432  MOVStreamContext *sc;
4433  int version;
4434  int flags;
4435 
4436  if (c->fc->nb_streams < 1)
4437  return 0;
4438  st = c->fc->streams[c->fc->nb_streams-1];
4439  sc = st->priv_data;
4440 
4441  version = avio_r8(pb);
4442  flags = avio_rb24(pb);
4443  st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
4444 
4445  if (version == 1) {
4446  avio_rb64(pb);
4447  avio_rb64(pb);
4448  } else {
4449  avio_rb32(pb); /* creation time */
4450  avio_rb32(pb); /* modification time */
4451  }
4452  st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
4453  avio_rb32(pb); /* reserved */
4454 
4455  /* highlevel (considering edits) duration in movie timebase */
4456  (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
4457  avio_rb32(pb); /* reserved */
4458  avio_rb32(pb); /* reserved */
4459 
4460  avio_rb16(pb); /* layer */
4461  avio_rb16(pb); /* alternate group */
4462  avio_rb16(pb); /* volume */
4463  avio_rb16(pb); /* reserved */
4464 
4465  //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
4466  // they're kept in fixed point format through all calculations
4467  // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
4468  // side data, but the scale factor is not needed to calculate aspect ratio
4469  for (i = 0; i < 3; i++) {
4470  display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
4471  display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
4472  display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
4473  }
4474 
4475  width = avio_rb32(pb); // 16.16 fixed point track width
4476  height = avio_rb32(pb); // 16.16 fixed point track height
4477  sc->width = width >> 16;
4478  sc->height = height >> 16;
4479 
4480  // apply the moov display matrix (after the tkhd one)
4481  for (i = 0; i < 3; i++) {
4482  const int sh[3] = { 16, 16, 30 };
4483  for (j = 0; j < 3; j++) {
4484  for (e = 0; e < 3; e++) {
4485  res_display_matrix[i][j] +=
4486  ((int64_t) display_matrix[i][e] *
4487  c->movie_display_matrix[e][j]) >> sh[e];
4488  }
4489  }
4490  }
4491 
4492  // save the matrix when it is not the default identity
4493  if (!IS_MATRIX_IDENT(res_display_matrix)) {
4494  double rotate;
4495 
4496  av_freep(&sc->display_matrix);
4497  sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
4498  if (!sc->display_matrix)
4499  return AVERROR(ENOMEM);
4500 
4501  for (i = 0; i < 3; i++)
4502  for (j = 0; j < 3; j++)
4503  sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
4504 
4505 #if FF_API_OLD_ROTATE_API
4506  rotate = av_display_rotation_get(sc->display_matrix);
4507  if (!isnan(rotate)) {
4508  char rotate_buf[64];
4509  rotate = -rotate;
4510  if (rotate < 0) // for backward compatibility
4511  rotate += 360;
4512  snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
4513  av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
4514  }
4515 #endif
4516  }
4517 
4518  // transform the display width/height according to the matrix
4519  // to keep the same scale, use [width height 1<<16]
4520  if (width && height && sc->display_matrix) {
4521  double disp_transform[2];
4522 
4523  for (i = 0; i < 2; i++)
4524  disp_transform[i] = hypot(sc->display_matrix[0 + i],
4525  sc->display_matrix[3 + i]);
4526 
4527  if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
4528  disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
4529  fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
4530  st->sample_aspect_ratio = av_d2q(
4531  disp_transform[0] / disp_transform[1],
4532  INT_MAX);
4533  }
4534  return 0;
4535 }
4536 
4537 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4538 {
4539  MOVFragment *frag = &c->fragment;
4540  MOVTrackExt *trex = NULL;
4541  int flags, track_id, i;
4542 
4543  avio_r8(pb); /* version */
4544  flags = avio_rb24(pb);
4545 
4546  track_id = avio_rb32(pb);
4547  if (!track_id)
4548  return AVERROR_INVALIDDATA;
4549  frag->track_id = track_id;
4550  set_frag_stream(&c->frag_index, track_id);
4551  for (i = 0; i < c->trex_count; i++)
4552  if (c->trex_data[i].track_id == frag->track_id) {
4553  trex = &c->trex_data[i];
4554  break;
4555  }
4556  if (!trex) {
4557  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
4558  return AVERROR_INVALIDDATA;
4559  }
4560 
4561  frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
4562  avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
4563  frag->moof_offset : frag->implicit_offset;
4564  frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
4565 
4566  frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
4567  avio_rb32(pb) : trex->duration;
4568  frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
4569  avio_rb32(pb) : trex->size;
4570  frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
4571  avio_rb32(pb) : trex->flags;
4572  av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
4573 
4574  return 0;
4575 }
4576 
4577 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4578 {
4579  unsigned i, num;
4580  void *new_tracks;
4581 
4582  num = atom.size / 4;
4583  if (!(new_tracks = av_malloc_array(num, sizeof(int))))
4584  return AVERROR(ENOMEM);
4585 
4586  av_free(c->chapter_tracks);
4587  c->chapter_tracks = new_tracks;
4588  c->nb_chapter_tracks = num;
4589 
4590  for (i = 0; i < num && !pb->eof_reached; i++)
4591  c->chapter_tracks[i] = avio_rb32(pb);
4592 
4593  return 0;
4594 }
4595 
4596 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4597 {
4598  MOVTrackExt *trex;
4599  int err;
4600 
4601  if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
4602  return AVERROR_INVALIDDATA;
4603  if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
4604  sizeof(*c->trex_data))) < 0) {
4605  c->trex_count = 0;
4606  return err;
4607  }
4608 
4609  c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
4610 
4611  trex = &c->trex_data[c->trex_count++];
4612  avio_r8(pb); /* version */
4613  avio_rb24(pb); /* flags */
4614  trex->track_id = avio_rb32(pb);
4615  trex->stsd_id = avio_rb32(pb);
4616  trex->duration = avio_rb32(pb);
4617  trex->size = avio_rb32(pb);
4618  trex->flags = avio_rb32(pb);
4619  return 0;
4620 }
4621 
4622 static int mov_read_tfdt(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4623 {
4624  MOVFragment *frag = &c->fragment;
4625  AVStream *st = NULL;
4626  MOVStreamContext *sc;
4627  int version, i;
4628  MOVFragmentStreamInfo * frag_stream_info;
4629  int64_t base_media_decode_time;
4630 
4631  for (i = 0; i < c->fc->nb_streams; i++) {
4632  if (c->fc->streams[i]->id == frag->track_id) {
4633  st = c->fc->streams[i];
4634  break;
4635  }
4636  }
4637  if (!st) {
4638  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4639  return AVERROR_INVALIDDATA;
4640  }
4641  sc = st->priv_data;
4642  if (sc->pseudo_stream_id + 1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4643  return 0;
4644  version = avio_r8(pb);
4645  avio_rb24(pb); /* flags */
4646  if (version) {
4647  base_media_decode_time = avio_rb64(pb);
4648  } else {
4649  base_media_decode_time = avio_rb32(pb);
4650  }
4651 
4652  frag_stream_info = get_current_frag_stream_info(&c->frag_index);
4653  if (frag_stream_info)
4654  frag_stream_info->tfdt_dts = base_media_decode_time;
4655  sc->track_end = base_media_decode_time;
4656 
4657  return 0;
4658 }
4659 
4660 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4661 {
4662  MOVFragment *frag = &c->fragment;
4663  AVStream *st = NULL;
4664  MOVStreamContext *sc;
4665  MOVStts *ctts_data;
4666  uint64_t offset;
4667  int64_t dts, pts = AV_NOPTS_VALUE;
4668  int data_offset = 0;
4669  unsigned entries, first_sample_flags = frag->flags;
4670  int flags, distance, i;
4671  int64_t prev_dts = AV_NOPTS_VALUE;
4672  int next_frag_index = -1, index_entry_pos;
4673  size_t requested_size;
4674  size_t old_ctts_allocated_size;
4675  AVIndexEntry *new_entries;
4676  MOVFragmentStreamInfo * frag_stream_info;
4677 
4678  for (i = 0; i < c->fc->nb_streams; i++) {
4679  if (c->fc->streams[i]->id == frag->track_id) {
4680  st = c->fc->streams[i];
4681  break;
4682  }
4683  }
4684  if (!st) {
4685  av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4686  return AVERROR_INVALIDDATA;
4687  }
4688  sc = st->priv_data;
4689  if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4690  return 0;
4691 
4692  // Find the next frag_index index that has a valid index_entry for
4693  // the current track_id.
4694  //
4695  // A valid index_entry means the trun for the fragment was read
4696  // and it's samples are in index_entries at the given position.
4697  // New index entries will be inserted before the index_entry found.
4698  index_entry_pos = st->nb_index_entries;
4699  for (i = c->frag_index.current + 1; i < c->frag_index.nb_items; i++) {
4700  frag_stream_info = get_frag_stream_info(&c->frag_index, i, frag->track_id);
4701  if (frag_stream_info && frag_stream_info->index_entry >= 0) {
4702  next_frag_index = i;
4703  index_entry_pos = frag_stream_info->index_entry;
4704  break;
4705  }
4706  }
4707 
4708  avio_r8(pb); /* version */
4709  flags = avio_rb24(pb);
4710  entries = avio_rb32(pb);
4711  av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %u\n", flags, entries);
4712 
4713  if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
4714  return AVERROR_INVALIDDATA;
4715  if (flags &