FFmpeg
wtvdec.c
Go to the documentation of this file.
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;
58  int64_t position;
59  int64_t length;
60 } WtvFile;
61 
62 static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
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 */
325  int64_t epoch;
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  int64_t pos = avio_tell(pb);
438 
439  avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
440  if (strcmp(mime, "image/jpeg"))
441  goto done;
442 
443  avio_r8(pb);
444  avio_get_str16le(pb, INT_MAX, description, sizeof(description));
445  filesize = avio_rl32(pb);
446  if (!filesize)
447  goto done;
448 
449  if (ff_add_attached_pic(s, NULL, pb, NULL, filesize) < 0)
450  goto done;
451  st = s->streams[s->nb_streams - 1];
452  av_dict_set(&st->metadata, "title", description, 0);
454  st->id = -1;
455 done:
456  avio_seek(pb, pos + length, SEEK_SET);
457 }
458 
459 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
460 {
461  int buf_size;
462  char *buf;
463 
464  if (!strcmp(key, "WM/MediaThumbType")) {
465  avio_skip(pb, length);
466  return;
467  }
468 
469  buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
470  buf = av_malloc(buf_size);
471  if (!buf)
472  return;
473 
474  if (type == 0 && length == 4) {
475  snprintf(buf, buf_size, "%u", avio_rl32(pb));
476  } else if (type == 1) {
477  avio_get_str16le(pb, length, buf, buf_size);
478  if (!strlen(buf)) {
479  av_free(buf);
480  return;
481  }
482  } else if (type == 3 && length == 4) {
483  strcpy(buf, avio_rl32(pb) ? "true" : "false");
484  } else if (type == 4 && length == 8) {
485  int64_t num = avio_rl64(pb);
486  if (!strcmp(key, "WM/EncodingTime") ||
487  !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) {
488  if (filetime_to_iso8601(buf, buf_size, num) < 0) {
489  av_free(buf);
490  return;
491  }
492  } else if (!strcmp(key, "WM/WMRVEncodeTime") ||
493  !strcmp(key, "WM/WMRVEndTime")) {
494  if (crazytime_to_iso8601(buf, buf_size, num) < 0) {
495  av_free(buf);
496  return;
497  }
498  } else if (!strcmp(key, "WM/WMRVExpirationDate")) {
499  if (oledate_to_iso8601(buf, buf_size, num) < 0 ) {
500  av_free(buf);
501  return;
502  }
503  } else if (!strcmp(key, "WM/WMRVBitrate"))
504  snprintf(buf, buf_size, "%f", av_int2double(num));
505  else
506  snprintf(buf, buf_size, "%"PRIi64, num);
507  } else if (type == 5 && length == 2) {
508  snprintf(buf, buf_size, "%u", avio_rl16(pb));
509  } else if (type == 6 && length == 16) {
510  ff_asf_guid guid;
511  avio_read(pb, guid, 16);
512  snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
513  } else if (type == 2 && !strcmp(key, "WM/Picture")) {
514  get_attachment(s, pb, length);
515  av_freep(&buf);
516  return;
517  } else {
518  av_freep(&buf);
519  av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
520  avio_skip(pb, length);
521  return;
522  }
523 
524  av_dict_set(&s->metadata, key, buf, 0);
525  av_freep(&buf);
526 }
527 
528 /**
529  * Parse metadata entries
530  */
532 {
533  ff_asf_guid guid;
534  int length, type;
535  while(!avio_feof(pb)) {
536  char key[1024];
537  ff_get_guid(pb, &guid);
538  type = avio_rl32(pb);
539  length = avio_rl32(pb);
540  if (!length)
541  break;
542  if (ff_guidcmp(&guid, ff_metadata_guid)) {
543  av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
544  "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
545  break;
546  }
547  avio_get_str16le(pb, INT_MAX, key, sizeof(key));
548  get_tag(s, pb, key, type, length);
549  }
550 
552 }
553 
554 /**
555  * parse VIDEOINFOHEADER2 structure
556  * @return bytes consumed
557  */
559 {
560  WtvContext *wtv = s->priv_data;
561  AVIOContext *pb = wtv->pb;
562 
563  avio_skip(pb, 72); // picture aspect ratio is unreliable
564  st->codecpar->codec_tag = ff_get_bmp_header(pb, st, NULL);
565 
566  return 72 + 40;
567 }
568 
569 /**
570  * Parse MPEG1WAVEFORMATEX extradata structure
571  */
573 {
574  /* fwHeadLayer */
575  switch (AV_RL16(st->codecpar->extradata)) {
576  case 0x0001 : st->codecpar->codec_id = AV_CODEC_ID_MP1; break;
577  case 0x0002 : st->codecpar->codec_id = AV_CODEC_ID_MP2; break;
578  case 0x0004 : st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
579  }
580 
581  st->codecpar->bit_rate = AV_RL32(st->codecpar->extradata + 2); /* dwHeadBitrate */
582 
583  /* dwHeadMode */
584  switch (AV_RL16(st->codecpar->extradata + 6)) {
585  case 1 :
586  case 2 :
587  case 4 : st->codecpar->channels = 2;
589  break;
590  case 8 : st->codecpar->channels = 1;
592  break;
593  }
594 }
595 
596 /**
597  * Initialise stream
598  * @param st Stream to initialise, or NULL to create and initialise new stream
599  * @return NULL on error
600  */
602 {
603  if (st) {
604  if (st->codecpar->extradata) {
605  av_freep(&st->codecpar->extradata);
606  st->codecpar->extradata_size = 0;
607  }
608  } else {
609  WtvStream *wst = av_mallocz(sizeof(WtvStream));
610  if (!wst)
611  return NULL;
612  st = avformat_new_stream(s, NULL);
613  if (!st) {
614  av_free(wst);
615  return NULL;
616  }
617  st->id = sid;
618  st->priv_data = wst;
619  }
622  avpriv_set_pts_info(st, 64, 1, 10000000);
623  return st;
624 }
625 
626 /**
627  * parse Media Type structure and populate stream
628  * @param st Stream, or NULL to create new stream
629  * @param mediatype Mediatype GUID
630  * @param subtype Subtype GUID
631  * @param formattype Format GUID
632  * @param size Size of format buffer
633  * @return NULL on error
634  */
636  ff_asf_guid mediatype, ff_asf_guid subtype,
637  ff_asf_guid formattype, uint64_t size)
638 {
639  WtvContext *wtv = s->priv_data;
640  AVIOContext *pb = wtv->pb;
643  ff_asf_guid actual_subtype;
644  ff_asf_guid actual_formattype;
645 
646  if (size < 32) {
647  av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
648  avio_skip(pb, size);
649  return NULL;
650  }
651 
652  avio_skip(pb, size - 32);
653  ff_get_guid(pb, &actual_subtype);
654  ff_get_guid(pb, &actual_formattype);
655  avio_seek(pb, -size, SEEK_CUR);
656 
657  st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
658  avio_skip(pb, 32);
659  return st;
660  } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
661  st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
662  if (!st)
663  return NULL;
664  if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
665  int ret = ff_get_wav_header(s, pb, st->codecpar, size, 0);
666  if (ret < 0)
667  return NULL;
668  } else {
669  if (ff_guidcmp(formattype, ff_format_none))
670  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
671  avio_skip(pb, size);
672  }
673 
674  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
676  } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
677  if (st->codecpar->extradata && st->codecpar->extradata_size >= 22)
679  else
680  av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
681  } else {
683  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
684  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
685  }
686  return st;
687  } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
688  st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
689  if (!st)
690  return NULL;
691  if (!ff_guidcmp(formattype, ff_format_videoinfo2)) {
692  int consumed = parse_videoinfoheader2(s, st);
693  avio_skip(pb, FFMAX(size - consumed, 0));
694  } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
695  uint64_t consumed = parse_videoinfoheader2(s, st);
696  /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
697  avio_skip(pb, FFMAX(size - consumed, 0));
698  } else {
699  if (ff_guidcmp(formattype, ff_format_none))
700  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
701  avio_skip(pb, size);
702  }
703 
704  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
706  } else {
708  }
709  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
710  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
711  return st;
712  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
714  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
715  if (!st)
716  return NULL;
717  if (ff_guidcmp(formattype, ff_format_none))
718  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
719  avio_skip(pb, size);
721  return st;
722  } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
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_mpeg2_sections) &&
734  if (ff_guidcmp(formattype, ff_format_none))
735  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
736  avio_skip(pb, size);
737  return NULL;
738  }
739 
740  av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
741  ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
742  FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
743  avio_skip(pb, size);
744  return NULL;
745 }
746 
747 enum {
750 };
751 
752 /**
753  * Try to seek over a broken chunk
754  * @return <0 on error
755  */
756 static int recover(WtvContext *wtv, uint64_t broken_pos)
757 {
758  AVIOContext *pb = wtv->pb;
759  int i;
760  for (i = 0; i < wtv->nb_index_entries; i++) {
761  if (wtv->index_entries[i].pos > broken_pos) {
762  int64_t ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
763  if (ret < 0)
764  return ret;
765  wtv->pts = wtv->index_entries[i].timestamp;
766  return 0;
767  }
768  }
769  return AVERROR(EIO);
770 }
771 
772 /**
773  * Parse WTV chunks
774  * @param mode SEEK_TO_DATA or SEEK_TO_PTS
775  * @param seekts timestamp
776  * @param[out] len_ptr Length of data chunk
777  * @return stream index of data chunk, or <0 on error
778  */
779 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
780 {
781  WtvContext *wtv = s->priv_data;
782  AVIOContext *pb = wtv->pb;
783  while (!avio_feof(pb)) {
784  ff_asf_guid g;
785  int len, sid, consumed;
786 
787  ff_get_guid(pb, &g);
788  len = avio_rl32(pb);
789  if (len < 32 || len > INT_MAX - 7) {
790  int ret;
791  if (avio_feof(pb))
792  return AVERROR_EOF;
793  av_log(s, AV_LOG_WARNING, "encountered broken chunk\n");
794  if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0)
795  return ret;
796  continue;
797  }
798  sid = avio_rl32(pb) & 0x7FFF;
799  avio_skip(pb, 8);
800  consumed = 32;
801 
803  if (ff_find_stream_index(s, sid) < 0) {
804  ff_asf_guid mediatype, subtype, formattype;
805  int size;
806  avio_skip(pb, 28);
807  ff_get_guid(pb, &mediatype);
808  ff_get_guid(pb, &subtype);
809  avio_skip(pb, 12);
810  ff_get_guid(pb, &formattype);
811  size = avio_rl32(pb);
812  if (size < 0 || size > INT_MAX - 92 - consumed)
813  return AVERROR_INVALIDDATA;
814  parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
815  consumed += 92 + size;
816  }
817  } else if (!ff_guidcmp(g, ff_stream2_guid)) {
818  int stream_index = ff_find_stream_index(s, sid);
819  if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
820  ff_asf_guid mediatype, subtype, formattype;
821  int size;
822  avio_skip(pb, 12);
823  ff_get_guid(pb, &mediatype);
824  ff_get_guid(pb, &subtype);
825  avio_skip(pb, 12);
826  ff_get_guid(pb, &formattype);
827  size = avio_rl32(pb);
828  if (size < 0 || size > INT_MAX - 76 - consumed)
829  return AVERROR_INVALIDDATA;
830  parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
831  consumed += 76 + size;
832  }
839  int stream_index = ff_find_stream_index(s, sid);
840  if (stream_index >= 0) {
841  AVStream *st = s->streams[stream_index];
842  uint8_t buf[258];
843  const uint8_t *pbuf = buf;
844  int buf_size;
845 
846  avio_skip(pb, 8);
847  consumed += 8;
850  avio_skip(pb, 6);
851  consumed += 6;
852  }
853 
854  buf_size = FFMIN(len - consumed, sizeof(buf));
855  avio_read(pb, buf, buf_size);
856  consumed += buf_size;
857  ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
858  }
860  int stream_index = ff_find_stream_index(s, sid);
861  if (stream_index >= 0) {
862  AVStream *st = s->streams[stream_index];
863  int audio_type;
864  avio_skip(pb, 8);
865  audio_type = avio_r8(pb);
866  if (audio_type == 2)
868  else if (audio_type == 3)
870  consumed += 9;
871  }
873  int stream_index = ff_find_stream_index(s, sid);
874  if (stream_index >= 0) {
875  avio_skip(pb, 12);
876  if (avio_rl32(pb))
877  av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
878  consumed += 16;
879  }
881  int stream_index = ff_find_stream_index(s, sid);
882  if (stream_index >= 0) {
883  AVStream *st = s->streams[stream_index];
884  uint8_t language[4];
885  avio_skip(pb, 12);
886  avio_read(pb, language, 3);
887  if (language[0]) {
888  language[3] = 0;
889  av_dict_set(&st->metadata, "language", language, 0);
890  if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
892  }
893  consumed += 15;
894  }
895  } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
896  int stream_index = ff_find_stream_index(s, sid);
897  if (stream_index >= 0) {
898  avio_skip(pb, 8);
899  wtv->pts = avio_rl64(pb);
900  consumed += 16;
901  if (wtv->pts == -1)
902  wtv->pts = AV_NOPTS_VALUE;
903  else {
904  wtv->last_valid_pts = wtv->pts;
905  if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
906  wtv->epoch = wtv->pts;
907  if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
908  avio_skip(pb, WTV_PAD8(len) - consumed);
909  return 0;
910  }
911  }
912  }
913  } else if (!ff_guidcmp(g, ff_data_guid)) {
914  int stream_index = ff_find_stream_index(s, sid);
915  if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
916  WtvStream *wst = s->streams[stream_index]->priv_data;
917  wst->seen_data = 1;
918  if (len_ptr) {
919  *len_ptr = len;
920  }
921  return stream_index;
922  }
923  } 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})) {
924  int stream_index = ff_find_stream_index(s, sid);
925  if (stream_index >= 0)
926  av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index);
927  } else if (
928  !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}) ||
929  !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}) ||
930  !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}) ||
931  !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
932  !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}) ||
933  !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}) ||
934  !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}) ||
935  !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}) ||
936  !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}) ||
937  !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}) ||
938  !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}) ||
939  !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
940  !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
941  !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
942  !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
943  !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
947  !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
948  //ignore known guids
949  } else
950  av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
951 
952  if (avio_feof(pb))
953  break;
954 
955  avio_skip(pb, WTV_PAD8(len) - consumed);
956  }
957  return AVERROR_EOF;
958 }
959 
961 {
962  WtvContext *wtv = s->priv_data;
963  unsigned root_sector;
964  int root_size;
965  uint8_t root[WTV_SECTOR_SIZE];
966  AVIOContext *pb;
967  int64_t timeline_pos;
968  int64_t ret;
969 
970  wtv->epoch =
971  wtv->pts =
973 
974  /* read root directory sector */
975  avio_skip(s->pb, 0x30);
976  root_size = avio_rl32(s->pb);
977  if (root_size > sizeof(root)) {
978  av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
979  return AVERROR_INVALIDDATA;
980  }
981  avio_skip(s->pb, 4);
982  root_sector = avio_rl32(s->pb);
983 
984  ret = seek_by_sector(s->pb, root_sector, 0);
985  if (ret < 0)
986  return ret;
987  root_size = avio_read(s->pb, root, root_size);
988  if (root_size < 0)
989  return AVERROR_INVALIDDATA;
990 
991  /* parse chunks up until first data chunk */
992  wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
993  if (!wtv->pb) {
994  av_log(s, AV_LOG_ERROR, "timeline data missing\n");
995  return AVERROR_INVALIDDATA;
996  }
997 
998  ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
999  if (ret < 0) {
1000  wtvfile_close(wtv->pb);
1001  return ret;
1002  }
1003  avio_seek(wtv->pb, -32, SEEK_CUR);
1004 
1005  timeline_pos = avio_tell(s->pb); // save before opening another file
1006 
1007  /* read metadata */
1008  pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
1009  if (pb) {
1010  parse_legacy_attrib(s, pb);
1011  wtvfile_close(pb);
1012  }
1013 
1014  s->ctx_flags |= AVFMTCTX_NOHEADER; // Needed for noStreams.wtv
1015 
1016  /* read seek index */
1017  if (s->nb_streams) {
1018  AVStream *st = s->streams[0];
1019  pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
1020  if (pb) {
1021  while(1) {
1022  uint64_t timestamp = avio_rl64(pb);
1023  uint64_t frame_nb = avio_rl64(pb);
1024  if (avio_feof(pb))
1025  break;
1027  0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1028  }
1029  wtvfile_close(pb);
1030 
1031  if (wtv->nb_index_entries) {
1032  pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
1033  if (pb) {
1034  AVIndexEntry *e = wtv->index_entries;
1035  AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1;
1036  uint64_t last_position = 0;
1037  while (1) {
1038  uint64_t frame_nb = avio_rl64(pb);
1039  uint64_t position = avio_rl64(pb);
1040  while (e <= e_end && frame_nb > e->size) {
1041  e->pos = last_position;
1042  e++;
1043  }
1044  if (avio_feof(pb))
1045  break;
1046  last_position = position;
1047  }
1048  e_end->pos = last_position;
1049  wtvfile_close(pb);
1050  st->duration = e_end->timestamp;
1051  }
1052  }
1053  }
1054  }
1055 
1056  avio_seek(s->pb, timeline_pos, SEEK_SET);
1057  return 0;
1058 }
1059 
1061 {
1062  WtvContext *wtv = s->priv_data;
1063  AVIOContext *pb = wtv->pb;
1064  int stream_index, len, ret;
1065 
1066  stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1067  if (stream_index < 0)
1068  return stream_index;
1069 
1070  ret = av_get_packet(pb, pkt, len - 32);
1071  if (ret < 0)
1072  return ret;
1073  pkt->stream_index = stream_index;
1074  pkt->pts = wtv->pts;
1075  avio_skip(pb, WTV_PAD8(len) - len);
1076  return 0;
1077 }
1078 
1079 static int read_seek(AVFormatContext *s, int stream_index,
1080  int64_t ts, int flags)
1081 {
1082  WtvContext *wtv = s->priv_data;
1083  AVIOContext *pb = wtv->pb;
1084  AVStream *st = s->streams[0];
1085  int64_t ts_relative;
1086  int i;
1087 
1089  return AVERROR(ENOSYS);
1090 
1091  /* timestamp adjustment is required because wtv->pts values are absolute,
1092  * whereas AVIndexEntry->timestamp values are relative to epoch. */
1093  ts_relative = ts;
1094  if (wtv->epoch != AV_NOPTS_VALUE)
1095  ts_relative -= wtv->epoch;
1096 
1097  i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1098  if (i < 0) {
1099  if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1100  if (avio_seek(pb, 0, SEEK_SET) < 0)
1101  return -1;
1102  } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1103  if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1104  return -1;
1105  }
1106  if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1107  return AVERROR(ERANGE);
1108  return 0;
1109  }
1110  if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1111  return -1;
1112  wtv->pts = wtv->index_entries[i].timestamp;
1113  if (wtv->epoch != AV_NOPTS_VALUE)
1114  wtv->pts += wtv->epoch;
1115  wtv->last_valid_pts = wtv->pts;
1116  return 0;
1117 }
1118 
1120 {
1121  WtvContext *wtv = s->priv_data;
1122  av_freep(&wtv->index_entries);
1123  wtvfile_close(wtv->pb);
1124  return 0;
1125 }
1126 
1128  .name = "wtv",
1129  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1130  .priv_data_size = sizeof(WtvContext),
1134  .read_seek = read_seek,
1136  .flags = AVFMT_SHOW_IDS,
1137 };
LEN_PRETTY_GUID
#define LEN_PRETTY_GUID
Definition: wtvdec.c:44
AV_CODEC_ID_EIA_608
@ AV_CODEC_ID_EIA_608
Definition: codec_id.h:528
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:187
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
crazytime_to_iso8601
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
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
filetime_to_iso8601
static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert win32 FILETIME to ISO-8601 string.
Definition: wtvdec.c:387
EVENTID_StreamIDSpanningEvent
static const ff_asf_guid EVENTID_StreamIDSpanningEvent
Definition: wtvdec.c:349
ff_mediasubtype_cpfilters_processed
const ff_asf_guid ff_mediasubtype_cpfilters_processed
Definition: wtv_common.c:68
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
ff_get_guid
int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riffdec.c:32
EVENTID_CtxADescriptorSpanningEvent
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent
Definition: wtvdec.c:343
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4374
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVFMT_SHOW_IDS
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:460
mpegts.h
EVENTID_AudioTypeSpanningEvent
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
Definition: wtvdec.c:353
EVENTID_DVBScramblingControlSpanningEvent
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent
Definition: wtvdec.c:347
wtvfile_read_packet
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: wtvdec.c:70
AVSEEK_FLAG_FRAME
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:2159
EVENTID_AudioDescriptorSpanningEvent
static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent
Definition: wtvdec.c:341
ff_mediatype_video
const ff_asf_guid ff_mediatype_video
Definition: wtv_common.c:43
WtvFile::position
int64_t position
Definition: wtvdec.c:58
mediasubtype_mpeg1payload
static const ff_asf_guid mediasubtype_mpeg1payload
Definition: wtvdec.c:359
AVStream::priv_data
void * priv_data
Definition: avformat.h:841
AV_RL64
uint64_t_TMPL AV_RL64
Definition: bytestream.h:91
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
WtvContext::pb
AVIOContext * pb
timeline file
Definition: wtvdec.c:324
av_int2double
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
avio_context_free
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:145
ff_timestamp_guid
const ff_asf_guid ff_timestamp_guid
Definition: wtv_common.c:29
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:90
WtvContext
Definition: wtvdec.c:323
parse_chunks
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
Parse WTV chunks.
Definition: wtvdec.c:779
parse_legacy_attrib
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
Parse metadata entries.
Definition: wtvdec.c:531
AV_RN16
#define AV_RN16(p)
Definition: intreadwrite.h:360
WtvFile::sectors
uint32_t * sectors
file allocation table
Definition: wtvdec.c:54
wtvfile_close
static void wtvfile_close(AVIOContext *pb)
Close file opened with wtvfile_open_sector(), or wtv_open()
Definition: wtvdec.c:306
ff_wav_codec_get_id
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
Definition: riffdec.c:192
EVENTID_SubtitleSpanningEvent
static const ff_asf_guid EVENTID_SubtitleSpanningEvent
Definition: wtvdec.c:337
WtvContext::epoch
int64_t epoch
Definition: wtvdec.c:325
AV_CODEC_ID_DVB_TELETEXT
@ AV_CODEC_ID_DVB_TELETEXT
Definition: codec_id.h:525
ff_sync_guid
const ff_asf_guid ff_sync_guid
Definition: wtv_common.c:37
WtvFile::sector_bits
int sector_bits
sector shift bits; used to convert sector number into pb_filesystem offset
Definition: wtvdec.c:53
AVStream::internal
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1008
ff_add_index_entry
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:1878
ff_format_waveformatex
const ff_asf_guid ff_format_waveformatex
Definition: wtv_common.c:74
AVSEEK_SIZE
#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
data
const char data[16]
Definition: mxf.c:142
AVSEEK_FLAG_BYTE
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2157
AVIOContext::error
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
wtvfile_seek
static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
Definition: wtvdec.c:108
intfloat.h
codec_type
enum AVMediaType codec_type
Definition: rtp.c:37
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:332
ff_timeline_table_0_entries_Events_le16
const uint8_t ff_timeline_table_0_entries_Events_le16[62]
Definition: wtv_common.c:52
AVIndexEntry
Definition: avformat.h:762
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
ff_stream1_guid
const ff_asf_guid ff_stream1_guid
Definition: wtv_common.c:35
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:770
ff_guidcmp
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:122
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
mediasubtype_teletext
static const ff_asf_guid mediasubtype_teletext
Definition: wtvdec.c:371
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
ff_get_bmp_header
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
ff_index_guid
const ff_asf_guid ff_index_guid
Definition: wtv_common.c:39
ff_data_guid
const ff_asf_guid ff_data_guid
Definition: wtv_common.c:31
parse_media_type
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:635
gmtime_r
#define gmtime_r
Definition: time_internal.h:34
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
wtvfile_open_sector
static AVIOContext * wtvfile_open_sector(unsigned first_sector, uint64_t length, int depth, AVFormatContext *s)
Open file.
Definition: wtvdec.c:151
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
WtvContext::index_entries_allocated_size
unsigned int index_entries_allocated_size
Definition: wtvdec.c:333
AV_CODEC_ID_MP3
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:421
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:875
SEEK_TO_PTS
@ SEEK_TO_PTS
Definition: wtvdec.c:749
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:717
SEEK_TO_DATA
@ SEEK_TO_DATA
Definition: wtvdec.c:748
ff_video_guids
const AVCodecGuid ff_video_guids[]
Definition: wtv_common.c:81
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
WtvFile::error
int error
Definition: wtvdec.c:57
AV_CODEC_ID_DVB_SUBTITLE
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: codec_id.h:519
ff_mediatype_audio
const ff_asf_guid ff_mediatype_audio
Definition: wtv_common.c:41
description
Tag description
Definition: snow.txt:206
read_seek
static int read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: wtvdec.c:1079
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:181
AVInputFormat
Definition: avformat.h:616
ff_parse_mpeg2_descriptor
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
mediasubtype_dvb_subtitle
static const ff_asf_guid mediasubtype_dvb_subtitle
Definition: wtvdec.c:369
avio_get_str16le
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.
FF_ARG_GUID
#define FF_ARG_GUID(g)
Definition: riff.h:109
intreadwrite.h
parse_mpeg1waveformatex
static void parse_mpeg1waveformatex(AVStream *st)
Parse MPEG1WAVEFORMATEX extradata structure.
Definition: wtvdec.c:572
s
#define s(width, name)
Definition: cbs_vp9.c:257
ff_timeline_le16
const uint8_t ff_timeline_le16[16]
Definition: wtv_common.c:50
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:621
g
const char * g
Definition: vf_curves.c:117
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_MP2
@ AV_CODEC_ID_MP2
Definition: codec_id.h:420
AVIndexEntry::size
int size
Definition: avformat.h:773
WtvStream::seen_data
int seen_data
Definition: wtvdec.c:320
AVIndexEntry::timestamp
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:764
WtvContext::index_entries
AVIndexEntry * index_entries
Definition: wtvdec.c:331
ff_format_none
const ff_asf_guid ff_format_none
Definition: wtv_common.c:45
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:94
mediasubtype_dtvccdata
static const ff_asf_guid mediasubtype_dtvccdata
Definition: wtvdec.c:373
key
const char * key
Definition: hwcontext_opencl.c:168
wtvfile_open2
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
EVENTID_LanguageSpanningEvent
static const ff_asf_guid EVENTID_LanguageSpanningEvent
Definition: wtvdec.c:339
time_internal.h
ARG_PRETTY_GUID
#define ARG_PRETTY_GUID(g)
Definition: wtvdec.c:42
AVFormatContext
Format I/O context.
Definition: avformat.h:1106
internal.h
WtvFile
Definition: wtvdec.c:50
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:979
WTV_BIGSECTOR_BITS
#define WTV_BIGSECTOR_BITS
Definition: wtv.h:30
NULL
#define NULL
Definition: coverity.c:32
ff_asf_guid
uint8_t ff_asf_guid[16]
Definition: riff.h:96
AVFMTCTX_NOHEADER
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1055
ff_asf_metadata_conv
const AVMetadataConv ff_asf_metadata_conv[]
Definition: asf.c:155
EVENTID_TeletextSpanningEvent
static const ff_asf_guid EVENTID_TeletextSpanningEvent
Definition: wtvdec.c:351
mediasubtype_mpeg2_sections
static const ff_asf_guid mediasubtype_mpeg2_sections
Definition: wtvdec.c:375
read_probe
static int read_probe(const AVProbeData *p)
Definition: wtvdec.c:378
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
ff_format_cpfilters_processed
const ff_asf_guid ff_format_cpfilters_processed
Definition: wtv_common.c:72
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:890
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
ff_wtv_guid
const ff_asf_guid ff_wtv_guid
Definition: wtv_common.c:27
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:733
mediatype_mstvcaption
static const ff_asf_guid mediatype_mstvcaption
Definition: wtvdec.c:365
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
ff_wtv_demuxer
const AVInputFormat ff_wtv_demuxer
Definition: wtvdec.c:1127
recover
static int recover(WtvContext *wtv, uint64_t broken_pos)
Try to seek over a broken chunk.
Definition: wtvdec.c:756
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3078
WtvFile::nb_sectors
int nb_sectors
number of sectors
Definition: wtvdec.c:55
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
avpriv_set_pts_info
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:4799
size
int size
Definition: twinvq_data.h:10344
EVENTID_CSDescriptorSpanningEvent
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent
Definition: wtvdec.c:345
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
read_ints
static int read_ints(AVIOContext *pb, uint32_t *data, int count)
read non-zero integers (le32) from input stream
Definition: wtvdec.c:134
ff_format_mpeg2_video
const ff_asf_guid ff_format_mpeg2_video
Definition: wtv_common.c:76
ff_stream2_guid
const ff_asf_guid ff_stream2_guid
Definition: wtv_common.c:64
AV_DISPOSITION_HEARING_IMPAIRED
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:790
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:607
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
ff_codec_guid_get_id
enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
Definition: riffdec.c:44
ff_DSATTRIB_TRANSPORT_PROPERTIES
const ff_asf_guid ff_DSATTRIB_TRANSPORT_PROPERTIES
Definition: wtv_common.c:60
mediatype_mpeg2_sections
static const ff_asf_guid mediatype_mpeg2_sections
Definition: wtvdec.c:361
AV_CODEC_ID_MJPEG
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
AVIOContext::opaque
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:233
parse_videoinfoheader2
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
parse VIDEOINFOHEADER2 structure
Definition: wtvdec.c:558
i
int i
Definition: input.c:407
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:358
WTV_SECTOR_SIZE
#define WTV_SECTOR_SIZE
Definition: wtv.h:29
WtvContext::pts
int64_t pts
pts for next data chunk
Definition: wtvdec.c:326
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wtvdec.c:1060
read_header
static int read_header(AVFormatContext *s)
Definition: wtvdec.c:960
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
ff_metadata_conv
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
value
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default value
Definition: writing_filters.txt:86
avio_alloc_context
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:128
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:243
len
int len
Definition: vorbis_enc_data.h:452
ff_get_wav_header
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
av_get_packet
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:280
language
Undefined Behavior In the C language
Definition: undefined.txt:3
WtvContext::nb_index_entries
int nb_index_entries
Definition: wtvdec.c:332
AVStream::disposition
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:879
AV_DISPOSITION_VISUAL_IMPAIRED
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:791
AVStream::id
int id
Format-specific stream ID.
Definition: avformat.h:839
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:832
WtvStream
Definition: wtvdec.c:319
PRI_PRETTY_GUID
#define PRI_PRETTY_GUID
Definition: wtvdec.c:40
WTV_SECTOR_BITS
#define WTV_SECTOR_BITS
Definition: wtv.h:28
oledate_to_iso8601
static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
Convert OLE DATE to ISO-8601 string.
Definition: wtvdec.c:419
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:243
WtvFile::pb_filesystem
AVIOContext * pb_filesystem
file system (AVFormatContext->pb)
Definition: wtvdec.c:51
AVStreamInternal::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:378
WtvContext::last_valid_pts
int64_t last_valid_pts
latest valid pts, used for interactive seeking
Definition: wtvdec.c:327
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
ff_table_0_entries_time_le16
const uint8_t ff_table_0_entries_time_le16[40]
Definition: wtv_common.c:56
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
ff_SBE2_STREAM_DESC_EVENT
const ff_asf_guid ff_SBE2_STREAM_DESC_EVENT
Definition: wtv_common.c:33
ff_codec_bmp_tags
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:33
channel_layout.h
ff_format_videoinfo2
const ff_asf_guid ff_format_videoinfo2
Definition: wtv_common.c:78
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
mode
mode
Definition: ebur128.h:83
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:616
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:763
ff_index_search_timestamp
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:1946
ff_dir_entry_guid
const ff_asf_guid ff_dir_entry_guid
Definition: wtv_common.c:25
AVPacket::stream_index
int stream_index
Definition: packet.h:367
FF_MEDIASUBTYPE_BASE_GUID
#define FF_MEDIASUBTYPE_BASE_GUID
Definition: riff.h:115
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:327
get_tag
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
Definition: wtvdec.c:459
seek_by_sector
static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
Definition: wtvdec.c:62
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
WTV_PAD8
#define WTV_PAD8(x)
Definition: wtv.h:31
AVIOContext::buffer
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:342
ff_find_stream_index
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4878
read_close
static int read_close(AVFormatContext *s)
Definition: wtvdec.c:1119
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_dict_set
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
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
avio_rl64
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:741
ff_codec_wav_guids
const AVCodecGuid ff_codec_wav_guids[]
Definition: riff.c:630
AVSTREAM_PARSE_FULL
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:753
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
ff_table_0_entries_legacy_attrib_le16
const uint8_t ff_table_0_entries_legacy_attrib_le16[58]
Definition: wtv_common.c:54
new_stream
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
Initialise stream.
Definition: wtvdec.c:601
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
wtvfile_open
#define wtvfile_open(s, buf, buf_size, filename)
Definition: wtvdec.c:300
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
WtvFile::length
int64_t length
Definition: wtvdec.c:59
ff_metadata_guid
const ff_asf_guid ff_metadata_guid
Definition: wtv_common.c:62
wtv.h
mediatype_mpeg2_pes
static const ff_asf_guid mediatype_mpeg2_pes
Definition: wtvdec.c:363
snprintf
#define snprintf
Definition: snprintf.h:34
AV_CODEC_ID_MP1
@ AV_CODEC_ID_MP1
Definition: codec_id.h:462
get_attachment
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
Definition: wtvdec.c:431
FF_PRI_GUID
#define FF_PRI_GUID
Definition: riff.h:105
ff_add_attached_pic
int ff_add_attached_pic(AVFormatContext *s, AVStream *st, AVIOContext *pb, AVBufferRef **buf, int size)
Add an attached pic to an AVStream.
Definition: utils.c:420
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:354