FFmpeg  4.4.5
wtvdec.c
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1 /*
2  * Windows Television (WTV) demuxer
3  * Copyright (c) 2010-2011 Peter Ross <pross@xvid.org>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Windows Television (WTV) demuxer
25  * @author Peter Ross <pross@xvid.org>
26  */
27 
28 #include <inttypes.h>
29 
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/intfloat.h"
34 #include "avformat.h"
35 #include "internal.h"
36 #include "wtv.h"
37 #include "mpegts.h"
38 
39 /* Macros for formatting GUIDs */
40 #define PRI_PRETTY_GUID \
41  "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"
42 #define ARG_PRETTY_GUID(g) \
43  AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15]
44 #define LEN_PRETTY_GUID 34
45 
46 /*
47  * File system routines
48  */
49 
50 typedef struct WtvFile {
51  AVIOContext *pb_filesystem; /**< file system (AVFormatContext->pb) */
52 
53  int sector_bits; /**< sector shift bits; used to convert sector number into pb_filesystem offset */
54  uint32_t *sectors; /**< file allocation table */
55  int nb_sectors; /**< number of sectors */
56 
57  int error;
60 } WtvFile;
61 
63 {
64  return avio_seek(pb, (sector << WTV_SECTOR_BITS) + offset, SEEK_SET);
65 }
66 
67 /**
68  * @return bytes read, AVERROR_EOF on end of file, or <0 on error
69  */
70 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
71 {
72  WtvFile *wf = opaque;
73  AVIOContext *pb = wf->pb_filesystem;
74  int nread = 0, n = 0;
75 
76  if (wf->error || pb->error)
77  return -1;
78  if (wf->position >= wf->length || avio_feof(pb))
79  return AVERROR_EOF;
80 
81  buf_size = FFMIN(buf_size, wf->length - wf->position);
82  while(nread < buf_size) {
83  int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
84  int read_request = FFMIN(buf_size - nread, remaining_in_sector);
85 
86  n = avio_read(pb, buf, read_request);
87  if (n <= 0)
88  break;
89  nread += n;
90  buf += n;
91  wf->position += n;
92  if (n == remaining_in_sector) {
93  int i = wf->position >> wf->sector_bits;
94  if (i >= wf->nb_sectors ||
95  (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
96  seek_by_sector(pb, wf->sectors[i], 0) < 0)) {
97  wf->error = 1;
98  break;
99  }
100  }
101  }
102  return nread ? nread : n;
103 }
104 
105 /**
106  * @return position (or file length)
107  */
108 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
109 {
110  WtvFile *wf = opaque;
111  AVIOContext *pb = wf->pb_filesystem;
112 
113  if (whence == AVSEEK_SIZE)
114  return wf->length;
115  else if (whence == SEEK_CUR)
116  offset = wf->position + offset;
117  else if (whence == SEEK_END)
118  offset = wf->length;
119 
120  wf->error = offset < 0 || offset >= wf->length ||
121  seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits],
122  offset & ((1 << wf->sector_bits) - 1)) < 0;
123  wf->position = offset;
124  return offset;
125 }
126 
127 /**
128  * read non-zero integers (le32) from input stream
129  * @param pb
130  * @param[out] data destination
131  * @param count maximum number of integers to read
132  * @return total number of integers read
133  */
134 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
135 {
136  int i, total = 0;
137  for (i = 0; i < count; i++) {
138  if ((data[total] = avio_rl32(pb)))
139  total++;
140  }
141  return total;
142 }
143 
144 /**
145  * Open file
146  * @param first_sector First sector
147  * @param length Length of file (bytes)
148  * @param depth File allocation table depth
149  * @return NULL on error
150  */
151 static AVIOContext * wtvfile_open_sector(unsigned first_sector, uint64_t length, int depth, AVFormatContext *s)
152 {
153  AVIOContext *pb;
154  WtvFile *wf;
155  uint8_t *buffer;
156  int64_t size;
157 
158  if (seek_by_sector(s->pb, first_sector, 0) < 0)
159  return NULL;
160 
161  wf = av_mallocz(sizeof(WtvFile));
162  if (!wf)
163  return NULL;
164 
165  if (depth == 0) {
166  wf->sectors = av_malloc(sizeof(uint32_t));
167  if (!wf->sectors) {
168  av_free(wf);
169  return NULL;
170  }
171  wf->sectors[0] = first_sector;
172  wf->nb_sectors = 1;
173  } else if (depth == 1) {
175  if (!wf->sectors) {
176  av_free(wf);
177  return NULL;
178  }
179  wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
180  } else if (depth == 2) {
181  uint32_t sectors1[WTV_SECTOR_SIZE / 4];
182  int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
183  int i;
184 
185  wf->sectors = av_malloc_array(nb_sectors1, 1 << WTV_SECTOR_BITS);
186  if (!wf->sectors) {
187  av_free(wf);
188  return NULL;
189  }
190  wf->nb_sectors = 0;
191  for (i = 0; i < nb_sectors1; i++) {
192  if (seek_by_sector(s->pb, sectors1[i], 0) < 0)
193  break;
194  wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
195  }
196  } else {
197  av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
198  av_free(wf);
199  return NULL;
200  }
201  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
202 
203  if (!wf->nb_sectors) {
204  av_freep(&wf->sectors);
205  av_freep(&wf);
206  return NULL;
207  }
208 
209  size = avio_size(s->pb);
210  if (size >= 0 && (int64_t)wf->sectors[wf->nb_sectors - 1] << WTV_SECTOR_BITS > size)
211  av_log(s, AV_LOG_WARNING, "truncated file\n");
212 
213  /* check length */
214  length &= 0xFFFFFFFFFFFF;
215  if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
216  av_log(s, AV_LOG_WARNING, "reported file length (0x%"PRIx64") exceeds number of available sectors (0x%"PRIx64")\n", length, (int64_t)wf->nb_sectors << wf->sector_bits);
217  length = (int64_t)wf->nb_sectors << wf->sector_bits;
218  }
219  wf->length = length;
220 
221  /* seek to initial sector */
222  wf->position = 0;
223  if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) {
224  av_freep(&wf->sectors);
225  av_freep(&wf);
226  return NULL;
227  }
228 
229  wf->pb_filesystem = s->pb;
230  buffer = av_malloc(1 << wf->sector_bits);
231  if (!buffer) {
232  av_freep(&wf->sectors);
233  av_freep(&wf);
234  return NULL;
235  }
236 
237  pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
239  if (!pb) {
240  av_freep(&buffer);
241  av_freep(&wf->sectors);
242  av_freep(&wf);
243  }
244  return pb;
245 }
246 
247 /**
248  * Open file using filename
249  * @param[in] buf directory buffer
250  * @param buf_size directory buffer size
251  * @param[in] filename
252  * @param filename_size size of filename
253  * @return NULL on error
254  */
255 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
256 {
257  const uint8_t *buf_end = buf + buf_size;
258 
259  while(buf + 48 <= buf_end) {
260  int dir_length, name_size, first_sector, depth;
261  uint64_t file_length;
262  const uint8_t *name;
263  if (ff_guidcmp(buf, ff_dir_entry_guid)) {
264  av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; "
265  "remaining directory entries ignored\n", FF_ARG_GUID(buf));
266  break;
267  }
268  dir_length = AV_RL16(buf + 16);
269  file_length = AV_RL64(buf + 24);
270  name_size = 2 * AV_RL32(buf + 32);
271  if (name_size < 0) {
273  "bad filename length, remaining directory entries ignored\n");
274  break;
275  }
276  if (dir_length == 0) {
278  "bad dir length, remaining directory entries ignored\n");
279  break;
280  }
281  if (48 + (int64_t)name_size > buf_end - buf) {
282  av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
283  break;
284  }
285  first_sector = AV_RL32(buf + 40 + name_size);
286  depth = AV_RL32(buf + 44 + name_size);
287 
288  /* compare file name; test optional null terminator */
289  name = buf + 40;
290  if (name_size >= filename_size &&
291  !memcmp(name, filename, filename_size) &&
292  (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
293  return wtvfile_open_sector(first_sector, file_length, depth, s);
294 
295  buf += dir_length;
296  }
297  return NULL;
298 }
299 
300 #define wtvfile_open(s, buf, buf_size, filename) \
301  wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
302 
303 /**
304  * Close file opened with wtvfile_open_sector(), or wtv_open()
305  */
306 static void wtvfile_close(AVIOContext *pb)
307 {
308  WtvFile *wf = pb->opaque;
309  av_freep(&wf->sectors);
310  av_freep(&pb->opaque);
311  av_freep(&pb->buffer);
312  avio_context_free(&pb);
313 }
314 
315 /*
316  * Main demuxer
317  */
318 
319 typedef struct WtvStream {
321 } WtvStream;
322 
323 typedef struct WtvContext {
324  AVIOContext *pb; /**< timeline file */
326  int64_t pts; /**< pts for next data chunk */
327  int64_t last_valid_pts; /**< latest valid pts, used for interactive seeking */
328 
329  /* maintain private seek index, as the AVIndexEntry->pos is relative to the
330  start of the 'timeline' file, not the file system (AVFormatContext->pb) */
334 } WtvContext;
335 
336 /* WTV GUIDs */
338  {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
340  {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
342  {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
344  {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
346  {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
348  {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
350  {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
352  {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
354  {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
355 
356 /* Windows media GUIDs */
357 
358 /* Media types */
360  {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
362  {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
364  {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
366  {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
367 
368 /* Media subtypes */
370  {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
372  {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
374  {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
376  {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
377 
378 static int read_probe(const AVProbeData *p)
379 {
380  return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
381 }
382 
383 /**
384  * Convert win32 FILETIME to ISO-8601 string
385  * @return <0 on error
386  */
387 static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
388 {
389  time_t t = (value / 10000000LL) - 11644473600LL;
390  struct tm tmbuf;
391  struct tm *tm = gmtime_r(&t, &tmbuf);
392  if (!tm)
393  return -1;
394  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
395  return -1;
396  return 0;
397 }
398 
399 /**
400  * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
401  * @return <0 on error
402  */
403 static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
404 {
405  time_t t = (value / 10000000LL) - 719162LL*86400LL;
406  struct tm tmbuf;
407  struct tm *tm = gmtime_r(&t, &tmbuf);
408  if (!tm)
409  return -1;
410  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
411  return -1;
412  return 0;
413 }
414 
415 /**
416  * Convert OLE DATE to ISO-8601 string
417  * @return <0 on error
418  */
419 static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
420 {
421  time_t t = (av_int2double(value) - 25569.0) * 86400;
422  struct tm tmbuf;
423  struct tm *tm= gmtime_r(&t, &tmbuf);
424  if (!tm)
425  return -1;
426  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
427  return -1;
428  return 0;
429 }
430 
431 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
432 {
433  char mime[1024];
434  char description[1024];
435  unsigned int filesize;
436  AVStream *st;
437  int ret;
438  int64_t pos = avio_tell(pb);
439 
440  avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
441  if (strcmp(mime, "image/jpeg"))
442  goto done;
443 
444  avio_r8(pb);
445  avio_get_str16le(pb, INT_MAX, description, sizeof(description));
446  filesize = avio_rl32(pb);
447  if (!filesize)
448  goto done;
449 
450  st = avformat_new_stream(s, NULL);
451  if (!st)
452  goto done;
453  av_dict_set(&st->metadata, "title", description, 0);
456  st->id = -1;
457  ret = av_get_packet(pb, &st->attached_pic, filesize);
458  if (ret < 0)
459  goto done;
460  st->attached_pic.stream_index = st->index;
463 done:
464  avio_seek(pb, pos + length, SEEK_SET);
465 }
466 
467 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
468 {
469  int buf_size;
470  char *buf;
471 
472  if (!strcmp(key, "WM/MediaThumbType")) {
473  avio_skip(pb, length);
474  return;
475  }
476 
477  buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
478  buf = av_malloc(buf_size);
479  if (!buf)
480  return;
481 
482  if (type == 0 && length == 4) {
483  snprintf(buf, buf_size, "%u", avio_rl32(pb));
484  } else if (type == 1) {
485  avio_get_str16le(pb, length, buf, buf_size);
486  if (!strlen(buf)) {
487  av_free(buf);
488  return;
489  }
490  } else if (type == 3 && length == 4) {
491  strcpy(buf, avio_rl32(pb) ? "true" : "false");
492  } else if (type == 4 && length == 8) {
493  int64_t num = avio_rl64(pb);
494  if (!strcmp(key, "WM/EncodingTime") ||
495  !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) {
496  if (filetime_to_iso8601(buf, buf_size, num) < 0) {
497  av_free(buf);
498  return;
499  }
500  } else if (!strcmp(key, "WM/WMRVEncodeTime") ||
501  !strcmp(key, "WM/WMRVEndTime")) {
502  if (crazytime_to_iso8601(buf, buf_size, num) < 0) {
503  av_free(buf);
504  return;
505  }
506  } else if (!strcmp(key, "WM/WMRVExpirationDate")) {
507  if (oledate_to_iso8601(buf, buf_size, num) < 0 ) {
508  av_free(buf);
509  return;
510  }
511  } else if (!strcmp(key, "WM/WMRVBitrate"))
512  snprintf(buf, buf_size, "%f", av_int2double(num));
513  else
514  snprintf(buf, buf_size, "%"PRIi64, num);
515  } else if (type == 5 && length == 2) {
516  snprintf(buf, buf_size, "%u", avio_rl16(pb));
517  } else if (type == 6 && length == 16) {
518  ff_asf_guid guid;
519  avio_read(pb, guid, 16);
520  snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
521  } else if (type == 2 && !strcmp(key, "WM/Picture")) {
522  get_attachment(s, pb, length);
523  av_freep(&buf);
524  return;
525  } else {
526  av_freep(&buf);
527  av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
528  avio_skip(pb, length);
529  return;
530  }
531 
532  av_dict_set(&s->metadata, key, buf, 0);
533  av_freep(&buf);
534 }
535 
536 /**
537  * Parse metadata entries
538  */
540 {
541  ff_asf_guid guid;
542  int length, type;
543  while(!avio_feof(pb)) {
544  char key[1024];
545  ff_get_guid(pb, &guid);
546  type = avio_rl32(pb);
547  length = avio_rl32(pb);
548  if (!length)
549  break;
550  if (ff_guidcmp(&guid, ff_metadata_guid)) {
551  av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
552  "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
553  break;
554  }
555  avio_get_str16le(pb, INT_MAX, key, sizeof(key));
556  get_tag(s, pb, key, type, length);
557  }
558 
560 }
561 
562 /**
563  * parse VIDEOINFOHEADER2 structure
564  * @return bytes consumed
565  */
567 {
568  WtvContext *wtv = s->priv_data;
569  AVIOContext *pb = wtv->pb;
570 
571  avio_skip(pb, 72); // picture aspect ratio is unreliable
572  st->codecpar->codec_tag = ff_get_bmp_header(pb, st, NULL);
573 
574  return 72 + 40;
575 }
576 
577 /**
578  * Parse MPEG1WAVEFORMATEX extradata structure
579  */
581 {
582  /* fwHeadLayer */
583  switch (AV_RL16(st->codecpar->extradata)) {
584  case 0x0001 : st->codecpar->codec_id = AV_CODEC_ID_MP1; break;
585  case 0x0002 : st->codecpar->codec_id = AV_CODEC_ID_MP2; break;
586  case 0x0004 : st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
587  }
588 
589  st->codecpar->bit_rate = AV_RL32(st->codecpar->extradata + 2); /* dwHeadBitrate */
590 
591  /* dwHeadMode */
592  switch (AV_RL16(st->codecpar->extradata + 6)) {
593  case 1 :
594  case 2 :
595  case 4 : st->codecpar->channels = 2;
597  break;
598  case 8 : st->codecpar->channels = 1;
600  break;
601  }
602 }
603 
604 /**
605  * Initialise stream
606  * @param st Stream to initialise, or NULL to create and initialise new stream
607  * @return NULL on error
608  */
610 {
611  if (st) {
612  if (st->codecpar->extradata) {
613  av_freep(&st->codecpar->extradata);
614  st->codecpar->extradata_size = 0;
615  }
616  } else {
617  WtvStream *wst = av_mallocz(sizeof(WtvStream));
618  if (!wst)
619  return NULL;
620  st = avformat_new_stream(s, NULL);
621  if (!st) {
622  av_free(wst);
623  return NULL;
624  }
625  st->id = sid;
626  st->priv_data = wst;
627  }
630  avpriv_set_pts_info(st, 64, 1, 10000000);
631  return st;
632 }
633 
634 /**
635  * parse Media Type structure and populate stream
636  * @param st Stream, or NULL to create new stream
637  * @param mediatype Mediatype GUID
638  * @param subtype Subtype GUID
639  * @param formattype Format GUID
640  * @param size Size of format buffer
641  * @return NULL on error
642  */
644  ff_asf_guid mediatype, ff_asf_guid subtype,
645  ff_asf_guid formattype, uint64_t size)
646 {
647  WtvContext *wtv = s->priv_data;
648  AVIOContext *pb = wtv->pb;
651  ff_asf_guid actual_subtype;
652  ff_asf_guid actual_formattype;
653 
654  if (size < 32) {
655  av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
656  avio_skip(pb, size);
657  return NULL;
658  }
659 
660  avio_skip(pb, size - 32);
661  ff_get_guid(pb, &actual_subtype);
662  ff_get_guid(pb, &actual_formattype);
663  if (avio_feof(pb))
664  return NULL;
665  avio_seek(pb, -size, SEEK_CUR);
666 
667  st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
668  avio_skip(pb, 32);
669  return st;
670  } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
671  st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
672  if (!st)
673  return NULL;
674  if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
675  int ret = ff_get_wav_header(s, pb, st->codecpar, size, 0);
676  if (ret < 0)
677  return NULL;
678  } else {
679  if (ff_guidcmp(formattype, ff_format_none))
680  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
681  avio_skip(pb, size);
682  }
683 
684  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
686  } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
687  if (st->codecpar->extradata && st->codecpar->extradata_size >= 22)
689  else
690  av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
691  } else {
693  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
694  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
695  }
696  return st;
697  } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
698  st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
699  if (!st)
700  return NULL;
701  if (!ff_guidcmp(formattype, ff_format_videoinfo2)) {
702  int consumed = parse_videoinfoheader2(s, st);
703  avio_skip(pb, FFMAX(size - consumed, 0));
704  } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
705  uint64_t consumed = parse_videoinfoheader2(s, st);
706  /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
707  avio_skip(pb, FFMAX(size - consumed, 0));
708  } else {
709  if (ff_guidcmp(formattype, ff_format_none))
710  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
711  avio_skip(pb, size);
712  }
713 
714  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
716  } else {
718  }
719  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
720  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
721  return st;
722  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
724  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
725  if (!st)
726  return NULL;
727  if (ff_guidcmp(formattype, ff_format_none))
728  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
729  avio_skip(pb, size);
731  return st;
732  } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
734  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
735  if (!st)
736  return NULL;
737  if (ff_guidcmp(formattype, ff_format_none))
738  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
739  avio_skip(pb, size);
741  return st;
742  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
744  if (ff_guidcmp(formattype, ff_format_none))
745  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
746  avio_skip(pb, size);
747  return NULL;
748  }
749 
750  av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
751  ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
752  FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
753  avio_skip(pb, size);
754  return NULL;
755 }
756 
757 enum {
760 };
761 
762 /**
763  * Try to seek over a broken chunk
764  * @return <0 on error
765  */
766 static int recover(WtvContext *wtv, uint64_t broken_pos)
767 {
768  AVIOContext *pb = wtv->pb;
769  int i;
770  for (i = 0; i < wtv->nb_index_entries; i++) {
771  if (wtv->index_entries[i].pos > broken_pos) {
772  int64_t ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
773  if (ret < 0)
774  return ret;
775  wtv->pts = wtv->index_entries[i].timestamp;
776  return 0;
777  }
778  }
779  return AVERROR(EIO);
780 }
781 
782 /**
783  * Parse WTV chunks
784  * @param mode SEEK_TO_DATA or SEEK_TO_PTS
785  * @param seekts timestamp
786  * @param[out] len_ptr Length of data chunk
787  * @return stream index of data chunk, or <0 on error
788  */
789 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
790 {
791  WtvContext *wtv = s->priv_data;
792  AVIOContext *pb = wtv->pb;
793  while (!avio_feof(pb)) {
794  ff_asf_guid g;
795  int len, sid, consumed;
796 
797  ff_get_guid(pb, &g);
798  len = avio_rl32(pb);
799  if (len < 32 || len > INT_MAX - 7) {
800  int ret;
801  if (avio_feof(pb))
802  return AVERROR_EOF;
803  av_log(s, AV_LOG_WARNING, "encountered broken chunk\n");
804  if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0)
805  return ret;
806  continue;
807  }
808  sid = avio_rl32(pb) & 0x7FFF;
809  avio_skip(pb, 8);
810  consumed = 32;
811 
813  if (ff_find_stream_index(s, sid) < 0) {
814  ff_asf_guid mediatype, subtype, formattype;
815  int size;
816  avio_skip(pb, 28);
817  ff_get_guid(pb, &mediatype);
818  ff_get_guid(pb, &subtype);
819  avio_skip(pb, 12);
820  ff_get_guid(pb, &formattype);
821  size = avio_rl32(pb);
822  if (size < 0 || size > INT_MAX - 92 - consumed)
823  return AVERROR_INVALIDDATA;
824  parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
825  consumed += 92 + size;
826  }
827  } else if (!ff_guidcmp(g, ff_stream2_guid)) {
828  int stream_index = ff_find_stream_index(s, sid);
829  if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
830  ff_asf_guid mediatype, subtype, formattype;
831  int size;
832  avio_skip(pb, 12);
833  ff_get_guid(pb, &mediatype);
834  ff_get_guid(pb, &subtype);
835  avio_skip(pb, 12);
836  ff_get_guid(pb, &formattype);
837  size = avio_rl32(pb);
838  if (size < 0 || size > INT_MAX - 76 - consumed)
839  return AVERROR_INVALIDDATA;
840  parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
841  consumed += 76 + size;
842  }
849  int stream_index = ff_find_stream_index(s, sid);
850  if (stream_index >= 0) {
851  AVStream *st = s->streams[stream_index];
852  uint8_t buf[258];
853  const uint8_t *pbuf = buf;
854  int buf_size;
855 
856  avio_skip(pb, 8);
857  consumed += 8;
860  avio_skip(pb, 6);
861  consumed += 6;
862  }
863 
864  buf_size = FFMIN(len - consumed, sizeof(buf));
865  avio_read(pb, buf, buf_size);
866  consumed += buf_size;
867  ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
868  }
870  int stream_index = ff_find_stream_index(s, sid);
871  if (stream_index >= 0) {
872  AVStream *st = s->streams[stream_index];
873  int audio_type;
874  avio_skip(pb, 8);
875  audio_type = avio_r8(pb);
876  if (audio_type == 2)
878  else if (audio_type == 3)
880  consumed += 9;
881  }
883  int stream_index = ff_find_stream_index(s, sid);
884  if (stream_index >= 0) {
885  avio_skip(pb, 12);
886  if (avio_rl32(pb))
887  av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
888  consumed += 16;
889  }
891  int stream_index = ff_find_stream_index(s, sid);
892  if (stream_index >= 0) {
893  AVStream *st = s->streams[stream_index];
894  uint8_t language[4];
895  avio_skip(pb, 12);
896  avio_read(pb, language, 3);
897  if (language[0]) {
898  language[3] = 0;
899  av_dict_set(&st->metadata, "language", language, 0);
900  if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
902  }
903  consumed += 15;
904  }
905  } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
906  int stream_index = ff_find_stream_index(s, sid);
907  if (stream_index >= 0) {
908  avio_skip(pb, 8);
909  wtv->pts = avio_rl64(pb);
910  consumed += 16;
911  if (wtv->pts == -1)
912  wtv->pts = AV_NOPTS_VALUE;
913  else {
914  wtv->last_valid_pts = wtv->pts;
915  if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
916  wtv->epoch = wtv->pts;
917  if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
918  avio_skip(pb, WTV_PAD8(len) - consumed);
919  return 0;
920  }
921  }
922  }
923  } else if (!ff_guidcmp(g, ff_data_guid)) {
924  int stream_index = ff_find_stream_index(s, sid);
925  if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
926  WtvStream *wst = s->streams[stream_index]->priv_data;
927  wst->seen_data = 1;
928  if (len_ptr) {
929  *len_ptr = len;
930  }
931  return stream_index;
932  }
933  } else if (!ff_guidcmp(g, /* DSATTRIB_WMDRMProtectionInfo */ (const ff_asf_guid){0x83,0x95,0x74,0x40,0x9D,0x6B,0xEC,0x4E,0xB4,0x3C,0x67,0xA1,0x80,0x1E,0x1A,0x9B})) {
934  int stream_index = ff_find_stream_index(s, sid);
935  if (stream_index >= 0)
936  av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index);
937  } else if (
938  !ff_guidcmp(g, /* DSATTRIB_CAPTURE_STREAMTIME */ (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) ||
939  !ff_guidcmp(g, /* DSATTRIB_PBDATAG_ATTRIBUTE */ (const ff_asf_guid){0x79,0x66,0xB5,0xE0,0xB9,0x12,0xCC,0x43,0xB7,0xDF,0x57,0x8C,0xAA,0x5A,0x7B,0x63}) ||
940  !ff_guidcmp(g, /* DSATTRIB_PicSampleSeq */ (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) ||
941  !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
942  !ff_guidcmp(g, /* dvr_ms_vid_frame_rep_data */ (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) ||
943  !ff_guidcmp(g, /* EVENTID_ChannelChangeSpanningEvent */ (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) ||
944  !ff_guidcmp(g, /* EVENTID_ChannelInfoSpanningEvent */ (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) ||
945  !ff_guidcmp(g, /* EVENTID_ChannelTypeSpanningEvent */ (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) ||
946  !ff_guidcmp(g, /* EVENTID_PIDListSpanningEvent */ (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) ||
947  !ff_guidcmp(g, /* EVENTID_SignalAndServiceStatusSpanningEvent */ (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) ||
948  !ff_guidcmp(g, /* EVENTID_StreamTypeSpanningEvent */ (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) ||
949  !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
950  !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
951  !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
952  !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
953  !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
957  !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
958  //ignore known guids
959  } else
960  av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
961 
962  if (avio_feof(pb))
963  break;
964 
965  avio_skip(pb, WTV_PAD8(len) - consumed);
966  }
967  return AVERROR_EOF;
968 }
969 
971 {
972  WtvContext *wtv = s->priv_data;
973  unsigned root_sector;
974  int root_size;
975  uint8_t root[WTV_SECTOR_SIZE];
976  AVIOContext *pb;
977  int64_t timeline_pos;
978  int64_t ret;
979 
980  wtv->epoch =
981  wtv->pts =
983 
984  /* read root directory sector */
985  avio_skip(s->pb, 0x30);
986  root_size = avio_rl32(s->pb);
987  if (root_size > sizeof(root)) {
988  av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
989  return AVERROR_INVALIDDATA;
990  }
991  avio_skip(s->pb, 4);
992  root_sector = avio_rl32(s->pb);
993 
994  ret = seek_by_sector(s->pb, root_sector, 0);
995  if (ret < 0)
996  return ret;
997  root_size = avio_read(s->pb, root, root_size);
998  if (root_size < 0)
999  return AVERROR_INVALIDDATA;
1000 
1001  /* parse chunks up until first data chunk */
1002  wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
1003  if (!wtv->pb) {
1004  av_log(s, AV_LOG_ERROR, "timeline data missing\n");
1005  return AVERROR_INVALIDDATA;
1006  }
1007 
1008  ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
1009  if (ret < 0) {
1010  wtvfile_close(wtv->pb);
1011  return ret;
1012  }
1013  avio_seek(wtv->pb, -32, SEEK_CUR);
1014 
1015  timeline_pos = avio_tell(s->pb); // save before opening another file
1016 
1017  /* read metadata */
1018  pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
1019  if (pb) {
1020  parse_legacy_attrib(s, pb);
1021  wtvfile_close(pb);
1022  }
1023 
1024  s->ctx_flags |= AVFMTCTX_NOHEADER; // Needed for noStreams.wtv
1025 
1026  /* read seek index */
1027  if (s->nb_streams) {
1028  AVStream *st = s->streams[0];
1029  pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
1030  if (pb) {
1031  while(1) {
1032  uint64_t timestamp = avio_rl64(pb);
1033  uint64_t frame_nb = avio_rl64(pb);
1034  if (avio_feof(pb))
1035  break;
1037  0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1038  }
1039  wtvfile_close(pb);
1040 
1041  if (wtv->nb_index_entries) {
1042  pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
1043  if (pb) {
1044  AVIndexEntry *e = wtv->index_entries;
1045  AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1;
1046  uint64_t last_position = 0;
1047  while (1) {
1048  uint64_t frame_nb = avio_rl64(pb);
1049  uint64_t position = avio_rl64(pb);
1050  while (e <= e_end && frame_nb > e->size) {
1051  e->pos = last_position;
1052  e++;
1053  }
1054  if (avio_feof(pb))
1055  break;
1056  last_position = position;
1057  }
1058  e_end->pos = last_position;
1059  wtvfile_close(pb);
1060  st->duration = e_end->timestamp;
1061  }
1062  }
1063  }
1064  }
1065 
1066  avio_seek(s->pb, timeline_pos, SEEK_SET);
1067  return 0;
1068 }
1069 
1071 {
1072  WtvContext *wtv = s->priv_data;
1073  AVIOContext *pb = wtv->pb;
1074  int stream_index, len, ret;
1075 
1076  stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1077  if (stream_index < 0)
1078  return stream_index;
1079 
1080  ret = av_get_packet(pb, pkt, len - 32);
1081  if (ret < 0)
1082  return ret;
1083  pkt->stream_index = stream_index;
1084  pkt->pts = wtv->pts;
1085  avio_skip(pb, WTV_PAD8(len) - len);
1086  return 0;
1087 }
1088 
1089 static int read_seek(AVFormatContext *s, int stream_index,
1090  int64_t ts, int flags)
1091 {
1092  WtvContext *wtv = s->priv_data;
1093  AVIOContext *pb = wtv->pb;
1094  AVStream *st = s->streams[0];
1095  int64_t ts_relative;
1096  int i;
1097 
1099  return AVERROR(ENOSYS);
1100 
1101  /* timestamp adjustment is required because wtv->pts values are absolute,
1102  * whereas AVIndexEntry->timestamp values are relative to epoch. */
1103  ts_relative = ts;
1104  if (wtv->epoch != AV_NOPTS_VALUE)
1105  ts_relative -= wtv->epoch;
1106 
1107  i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1108  if (i < 0) {
1109  if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1110  if (avio_seek(pb, 0, SEEK_SET) < 0)
1111  return -1;
1112  } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1113  if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1114  return -1;
1115  }
1116  if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1117  return AVERROR(ERANGE);
1118  return 0;
1119  }
1120  if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1121  return -1;
1122  wtv->pts = wtv->index_entries[i].timestamp;
1123  if (wtv->epoch != AV_NOPTS_VALUE)
1124  wtv->pts += wtv->epoch;
1125  wtv->last_valid_pts = wtv->pts;
1126  return 0;
1127 }
1128 
1130 {
1131  WtvContext *wtv = s->priv_data;
1132  av_freep(&wtv->index_entries);
1133  wtvfile_close(wtv->pb);
1134  return 0;
1135 }
1136 
1138  .name = "wtv",
1139  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1140  .priv_data_size = sizeof(WtvContext),
1144  .read_seek = read_seek,
1146  .flags = AVFMT_SHOW_IDS,
1147 };
const AVMetadataConv ff_asf_metadata_conv[]
Definition: asf.c:153
uint8_t
Main libavformat public API header.
#define AVINDEX_KEYFRAME
Definition: avformat.h:811
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:831
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1177
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2416
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:460
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:310
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:832
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:841
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:2418
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:794
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:342
int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a UTF-16 string from pb and convert it to UTF-8.
#define AVSEEK_SIZE
ORing this as the "whence" parameter to a seek function causes it to return the filesize without seek...
Definition: avio.h:531
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:734
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
Definition: aviobuf.c:138
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:155
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:624
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:758
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_RL64
Definition: intreadwrite.h:173
#define AV_RL32
Definition: intreadwrite.h:146
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
audio channel layout utility functions
#define FFMIN(a, b)
Definition: common.h:105
#define FFMAX(a, b)
Definition: common.h:103
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
double value
Definition: eval.c:98
#define AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_STEREO
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: codec_id.h:524
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
@ AV_CODEC_ID_MP1
Definition: codec_id.h:466
@ AV_CODEC_ID_EIA_608
Definition: codec_id.h:534
@ AV_CODEC_ID_MP2
Definition: codec_id.h:424
@ AV_CODEC_ID_DVB_TELETEXT
Definition: codec_id.h:530
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:425
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
cl_device_type type
const char * key
int i
Definition: input.c:407
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
#define AV_RN16(p)
Definition: intreadwrite.h:360
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:5029
int ff_add_index_entry(AVIndexEntry **index_entries, int *nb_index_entries, unsigned int *index_entries_allocated_size, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Internal version of av_add_index_entry.
Definition: utils.c:1954
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)
Internal version of av_index_search_timestamp.
Definition: utils.c:2022
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4945
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3131
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type, const uint8_t **pp, const uint8_t *desc_list_end, Mp4Descr *mp4_descr, int mp4_descr_count, int pid, MpegTSContext *ts)
Parse an MPEG-2 descriptor.
Definition: mpegts.c:1781
const char data[16]
Definition: mxf.c:142
const char * name
Definition: qsvenc.c:46
const AVCodecGuid ff_codec_wav_guids[]
Definition: riff.c:630
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:33
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:122
int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riffdec.c:32
int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size)
Read BITMAPINFOHEADER structure and set AVStream codec width, height and bits_per_encoded_sample fiel...
Definition: riffdec.c:209
#define FF_PRI_GUID
Definition: riff.h:105
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
Definition: riffdec.c:192
#define FF_ARG_GUID(g)
Definition: riff.h:109
#define FF_MEDIASUBTYPE_BASE_GUID
Definition: riff.h:115
uint8_t ff_asf_guid[16]
Definition: riff.h:96
enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
Definition: riffdec.c:44
enum AVMediaType codec_type
Definition: rtp.c:37
static char buffer[20]
Definition: seek.c:32
#define snprintf
Definition: snprintf.h:34
unsigned int pos
Definition: spdifenc.c:412
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
int channels
Audio only.
Definition: codec_par.h:166
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
Format I/O context.
Definition: avformat.h:1232
Bytestream IO Context.
Definition: avio.h:161
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:233
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
int64_t pos
Definition: avformat.h:804
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:805
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:922
AVDictionary * metadata
Definition: avformat.h:937
void * priv_data
Definition: avformat.h:888
int id
Format-specific stream ID.
Definition: avformat.h:880
int index
stream index in AVFormatContext
Definition: avformat.h:874
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:955
enum AVStreamParseType need_parsing
Definition: avformat.h:1081
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:926
unsigned int index_entries_allocated_size
Definition: wtvdec.c:333
int nb_index_entries
Definition: wtvdec.c:332
int64_t pts
pts for next data chunk
Definition: wtvdec.c:326
int64_t last_valid_pts
latest valid pts, used for interactive seeking
Definition: wtvdec.c:327
AVIOContext * pb
timeline file
Definition: wtvdec.c:324
int64_t epoch
Definition: wtvdec.c:325
AVIndexEntry * index_entries
Definition: wtvdec.c:331
Definition: wtvdec.c:50
uint32_t * sectors
file allocation table
Definition: wtvdec.c:54
int64_t position
Definition: wtvdec.c:58
AVIOContext * pb_filesystem
file system (AVFormatContext->pb)
Definition: wtvdec.c:51
int error
Definition: wtvdec.c:57
int nb_sectors
number of sectors
Definition: wtvdec.c:55
int64_t length
Definition: wtvdec.c:59
int sector_bits
sector shift bits; used to convert sector number into pb_filesystem offset
Definition: wtvdec.c:53
int seen_data
Definition: wtvdec.c:320
#define av_free(p)
#define av_malloc_array(a, b)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
#define gmtime_r
Definition: time_internal.h:34
int size
const char * g
Definition: vf_curves.c:117
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
int len
const ff_asf_guid ff_mediatype_audio
Definition: wtv_common.c:41
const uint8_t ff_timeline_table_0_entries_Events_le16[62]
Definition: wtv_common.c:52
const ff_asf_guid ff_format_mpeg2_video
Definition: wtv_common.c:76
const ff_asf_guid ff_metadata_guid
Definition: wtv_common.c:62
#define WTV_SECTOR_BITS
Definition: wtv.h:28
const ff_asf_guid ff_format_none
Definition: wtv_common.c:45
const ff_asf_guid ff_mediasubtype_cpfilters_processed
Definition: wtv_common.c:68
const uint8_t ff_table_0_entries_time_le16[40]
Definition: wtv_common.c:56
const ff_asf_guid ff_SBE2_STREAM_DESC_EVENT
Definition: wtv_common.c:33
const ff_asf_guid ff_mediatype_video
Definition: wtv_common.c:43
const ff_asf_guid ff_stream2_guid
Definition: wtv_common.c:64
const AVCodecGuid ff_video_guids[]
Definition: wtv_common.c:81
const ff_asf_guid ff_data_guid
Definition: wtv_common.c:31
const ff_asf_guid ff_format_waveformatex
Definition: wtv_common.c:74
const uint8_t ff_timeline_le16[16]
Definition: wtv_common.c:50
const ff_asf_guid ff_format_videoinfo2
Definition: wtv_common.c:78
const ff_asf_guid ff_timestamp_guid
Definition: wtv_common.c:29
const ff_asf_guid ff_index_guid
Definition: wtv_common.c:39
const ff_asf_guid ff_DSATTRIB_TRANSPORT_PROPERTIES
Definition: wtv_common.c:60
#define WTV_BIGSECTOR_BITS
Definition: wtv.h:30
const uint8_t ff_table_0_entries_legacy_attrib_le16[58]
Definition: wtv_common.c:54
const ff_asf_guid ff_dir_entry_guid
Definition: wtv_common.c:25
#define WTV_PAD8(x)
Definition: wtv.h:31
const ff_asf_guid ff_sync_guid
Definition: wtv_common.c:37
const ff_asf_guid ff_wtv_guid
Definition: wtv_common.c:27
#define WTV_SECTOR_SIZE
Definition: wtv.h:29
const ff_asf_guid ff_format_cpfilters_processed
Definition: wtv_common.c:72
const ff_asf_guid ff_stream1_guid
Definition: wtv_common.c:35
AVInputFormat ff_wtv_demuxer
Definition: wtvdec.c:1137
static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string.
Definition: wtvdec.c:403
#define PRI_PRETTY_GUID
Definition: wtvdec.c:40
static const ff_asf_guid EVENTID_SubtitleSpanningEvent
Definition: wtvdec.c:337
static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
Convert OLE DATE to ISO-8601 string.
Definition: wtvdec.c:419
static int recover(WtvContext *wtv, uint64_t broken_pos)
Try to seek over a broken chunk.
Definition: wtvdec.c:766
static const ff_asf_guid mediasubtype_mpeg2_sections
Definition: wtvdec.c:375
#define wtvfile_open(s, buf, buf_size, filename)
Definition: wtvdec.c:300
static const ff_asf_guid mediatype_mstvcaption
Definition: wtvdec.c:365
static int read_close(AVFormatContext *s)
Definition: wtvdec.c:1129
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
Parse WTV chunks.
Definition: wtvdec.c:789
static const ff_asf_guid mediatype_mpeg2_pes
Definition: wtvdec.c:363
static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
Definition: wtvdec.c:62
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent
Definition: wtvdec.c:345
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
Definition: wtvdec.c:353
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
parse VIDEOINFOHEADER2 structure
Definition: wtvdec.c:566
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wtvdec.c:1070
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
Definition: wtvdec.c:467
static const ff_asf_guid mediatype_mpeg2_sections
Definition: wtvdec.c:361
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
Initialise stream.
Definition: wtvdec.c:609
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
Definition: wtvdec.c:431
static int read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: wtvdec.c:1089
static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert win32 FILETIME to ISO-8601 string.
Definition: wtvdec.c:387
static const ff_asf_guid mediasubtype_dvb_subtitle
Definition: wtvdec.c:369
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent
Definition: wtvdec.c:347
static int read_probe(const AVProbeData *p)
Definition: wtvdec.c:378
static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
Open file using filename.
Definition: wtvdec.c:255
#define ARG_PRETTY_GUID(g)
Definition: wtvdec.c:42
static AVIOContext * wtvfile_open_sector(unsigned first_sector, uint64_t length, int depth, AVFormatContext *s)
Open file.
Definition: wtvdec.c:151
static const ff_asf_guid mediasubtype_mpeg1payload
Definition: wtvdec.c:359
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent
Definition: wtvdec.c:343
static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, ff_asf_guid mediatype, ff_asf_guid subtype, ff_asf_guid formattype, uint64_t size)
parse Media Type structure and populate stream
Definition: wtvdec.c:643
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
Parse metadata entries.
Definition: wtvdec.c:539
#define LEN_PRETTY_GUID
Definition: wtvdec.c:44
@ SEEK_TO_DATA
Definition: wtvdec.c:758
@ SEEK_TO_PTS
Definition: wtvdec.c:759
static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
Definition: wtvdec.c:108
static const ff_asf_guid mediasubtype_dtvccdata
Definition: wtvdec.c:373
static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent
Definition: wtvdec.c:341
static void parse_mpeg1waveformatex(AVStream *st)
Parse MPEG1WAVEFORMATEX extradata structure.
Definition: wtvdec.c:580
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: wtvdec.c:70
static const ff_asf_guid EVENTID_LanguageSpanningEvent
Definition: wtvdec.c:339
static int read_header(AVFormatContext *s)
Definition: wtvdec.c:970
static const ff_asf_guid EVENTID_StreamIDSpanningEvent
Definition: wtvdec.c:349
static int read_ints(AVIOContext *pb, uint32_t *data, int count)
read non-zero integers (le32) from input stream
Definition: wtvdec.c:134
static const ff_asf_guid EVENTID_TeletextSpanningEvent
Definition: wtvdec.c:351
static void wtvfile_close(AVIOContext *pb)
Close file opened with wtvfile_open_sector(), or wtv_open()
Definition: wtvdec.c:306
static const ff_asf_guid mediasubtype_teletext
Definition: wtvdec.c:371