FFmpeg  4.3
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;
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  */
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) {
272  av_log(s, AV_LOG_ERROR,
273  "bad filename length, remaining directory entries ignored\n");
274  break;
275  }
276  if (48 + (int64_t)name_size > buf_end - buf) {
277  av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
278  break;
279  }
280  first_sector = AV_RL32(buf + 40 + name_size);
281  depth = AV_RL32(buf + 44 + name_size);
282 
283  /* compare file name; test optional null terminator */
284  name = buf + 40;
285  if (name_size >= filename_size &&
286  !memcmp(name, filename, filename_size) &&
287  (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
288  return wtvfile_open_sector(first_sector, file_length, depth, s);
289 
290  buf += dir_length;
291  }
292  return NULL;
293 }
294 
295 #define wtvfile_open(s, buf, buf_size, filename) \
296  wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
297 
298 /**
299  * Close file opened with wtvfile_open_sector(), or wtv_open()
300  */
301 static void wtvfile_close(AVIOContext *pb)
302 {
303  WtvFile *wf = pb->opaque;
304  av_freep(&wf->sectors);
305  av_freep(&pb->opaque);
306  av_freep(&pb->buffer);
307  avio_context_free(&pb);
308 }
309 
310 /*
311  * Main demuxer
312  */
313 
314 typedef struct WtvStream {
316 } WtvStream;
317 
318 typedef struct WtvContext {
319  AVIOContext *pb; /**< timeline file */
320  int64_t epoch;
321  int64_t pts; /**< pts for next data chunk */
322  int64_t last_valid_pts; /**< latest valid pts, used for interactive seeking */
323 
324  /* maintain private seek index, as the AVIndexEntry->pos is relative to the
325  start of the 'timeline' file, not the file system (AVFormatContext->pb) */
329 } WtvContext;
330 
331 /* WTV GUIDs */
333  {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
335  {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
337  {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
339  {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
341  {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
343  {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
345  {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
347  {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
349  {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
350 
351 /* Windows media GUIDs */
352 
353 /* Media types */
355  {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
357  {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
359  {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
361  {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
362 
363 /* Media subtypes */
365  {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
367  {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
369  {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
371  {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
372 
373 static int read_probe(const AVProbeData *p)
374 {
375  return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
376 }
377 
378 /**
379  * Convert win32 FILETIME to ISO-8601 string
380  * @return <0 on error
381  */
382 static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
383 {
384  time_t t = (value / 10000000LL) - 11644473600LL;
385  struct tm tmbuf;
386  struct tm *tm = gmtime_r(&t, &tmbuf);
387  if (!tm)
388  return -1;
389  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
390  return -1;
391  return 0;
392 }
393 
394 /**
395  * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
396  * @return <0 on error
397  */
398 static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
399 {
400  time_t t = (value / 10000000LL) - 719162LL*86400LL;
401  struct tm tmbuf;
402  struct tm *tm = gmtime_r(&t, &tmbuf);
403  if (!tm)
404  return -1;
405  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
406  return -1;
407  return 0;
408 }
409 
410 /**
411  * Convert OLE DATE to ISO-8601 string
412  * @return <0 on error
413  */
414 static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
415 {
416  time_t t = (av_int2double(value) - 25569.0) * 86400;
417  struct tm tmbuf;
418  struct tm *tm= gmtime_r(&t, &tmbuf);
419  if (!tm)
420  return -1;
421  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
422  return -1;
423  return 0;
424 }
425 
427 {
428  char mime[1024];
429  char description[1024];
430  unsigned int filesize;
431  AVStream *st;
432  int ret;
433  int64_t pos = avio_tell(pb);
434 
435  avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
436  if (strcmp(mime, "image/jpeg"))
437  goto done;
438 
439  avio_r8(pb);
440  avio_get_str16le(pb, INT_MAX, description, sizeof(description));
441  filesize = avio_rl32(pb);
442  if (!filesize)
443  goto done;
444 
445  st = avformat_new_stream(s, NULL);
446  if (!st)
447  goto done;
448  av_dict_set(&st->metadata, "title", description, 0);
451  st->id = -1;
452  ret = av_get_packet(pb, &st->attached_pic, filesize);
453  if (ret < 0)
454  goto done;
455  st->attached_pic.stream_index = st->index;
458 done:
459  avio_seek(pb, pos + length, SEEK_SET);
460 }
461 
462 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
463 {
464  int buf_size;
465  char *buf;
466 
467  if (!strcmp(key, "WM/MediaThumbType")) {
468  avio_skip(pb, length);
469  return;
470  }
471 
472  buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
473  buf = av_malloc(buf_size);
474  if (!buf)
475  return;
476 
477  if (type == 0 && length == 4) {
478  snprintf(buf, buf_size, "%u", avio_rl32(pb));
479  } else if (type == 1) {
480  avio_get_str16le(pb, length, buf, buf_size);
481  if (!strlen(buf)) {
482  av_free(buf);
483  return;
484  }
485  } else if (type == 3 && length == 4) {
486  strcpy(buf, avio_rl32(pb) ? "true" : "false");
487  } else if (type == 4 && length == 8) {
488  int64_t num = avio_rl64(pb);
489  if (!strcmp(key, "WM/EncodingTime") ||
490  !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) {
491  if (filetime_to_iso8601(buf, buf_size, num) < 0) {
492  av_free(buf);
493  return;
494  }
495  } else if (!strcmp(key, "WM/WMRVEncodeTime") ||
496  !strcmp(key, "WM/WMRVEndTime")) {
497  if (crazytime_to_iso8601(buf, buf_size, num) < 0) {
498  av_free(buf);
499  return;
500  }
501  } else if (!strcmp(key, "WM/WMRVExpirationDate")) {
502  if (oledate_to_iso8601(buf, buf_size, num) < 0 ) {
503  av_free(buf);
504  return;
505  }
506  } else if (!strcmp(key, "WM/WMRVBitrate"))
507  snprintf(buf, buf_size, "%f", av_int2double(num));
508  else
509  snprintf(buf, buf_size, "%"PRIi64, num);
510  } else if (type == 5 && length == 2) {
511  snprintf(buf, buf_size, "%u", avio_rl16(pb));
512  } else if (type == 6 && length == 16) {
513  ff_asf_guid guid;
514  avio_read(pb, guid, 16);
515  snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
516  } else if (type == 2 && !strcmp(key, "WM/Picture")) {
517  get_attachment(s, pb, length);
518  av_freep(&buf);
519  return;
520  } else {
521  av_freep(&buf);
522  av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
523  avio_skip(pb, length);
524  return;
525  }
526 
527  av_dict_set(&s->metadata, key, buf, 0);
528  av_freep(&buf);
529 }
530 
531 /**
532  * Parse metadata entries
533  */
535 {
536  ff_asf_guid guid;
537  int length, type;
538  while(!avio_feof(pb)) {
539  char key[1024];
540  ff_get_guid(pb, &guid);
541  type = avio_rl32(pb);
542  length = avio_rl32(pb);
543  if (!length)
544  break;
545  if (ff_guidcmp(&guid, ff_metadata_guid)) {
546  av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
547  "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
548  break;
549  }
550  avio_get_str16le(pb, INT_MAX, key, sizeof(key));
551  get_tag(s, pb, key, type, length);
552  }
553 
555 }
556 
557 /**
558  * parse VIDEOINFOHEADER2 structure
559  * @return bytes consumed
560  */
562 {
563  WtvContext *wtv = s->priv_data;
564  AVIOContext *pb = wtv->pb;
565 
566  avio_skip(pb, 72); // picture aspect ratio is unreliable
567  st->codecpar->codec_tag = ff_get_bmp_header(pb, st, NULL);
568 
569  return 72 + 40;
570 }
571 
572 /**
573  * Parse MPEG1WAVEFORMATEX extradata structure
574  */
576 {
577  /* fwHeadLayer */
578  switch (AV_RL16(st->codecpar->extradata)) {
579  case 0x0001 : st->codecpar->codec_id = AV_CODEC_ID_MP1; break;
580  case 0x0002 : st->codecpar->codec_id = AV_CODEC_ID_MP2; break;
581  case 0x0004 : st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
582  }
583 
584  st->codecpar->bit_rate = AV_RL32(st->codecpar->extradata + 2); /* dwHeadBitrate */
585 
586  /* dwHeadMode */
587  switch (AV_RL16(st->codecpar->extradata + 6)) {
588  case 1 :
589  case 2 :
590  case 4 : st->codecpar->channels = 2;
592  break;
593  case 8 : st->codecpar->channels = 1;
595  break;
596  }
597 }
598 
599 /**
600  * Initialise stream
601  * @param st Stream to initialise, or NULL to create and initialise new stream
602  * @return NULL on error
603  */
605 {
606  if (st) {
607  if (st->codecpar->extradata) {
608  av_freep(&st->codecpar->extradata);
609  st->codecpar->extradata_size = 0;
610  }
611  } else {
612  WtvStream *wst = av_mallocz(sizeof(WtvStream));
613  if (!wst)
614  return NULL;
615  st = avformat_new_stream(s, NULL);
616  if (!st) {
617  av_free(wst);
618  return NULL;
619  }
620  st->id = sid;
621  st->priv_data = wst;
622  }
625  avpriv_set_pts_info(st, 64, 1, 10000000);
626  return st;
627 }
628 
629 /**
630  * parse Media Type structure and populate stream
631  * @param st Stream, or NULL to create new stream
632  * @param mediatype Mediatype GUID
633  * @param subtype Subtype GUID
634  * @param formattype Format GUID
635  * @param size Size of format buffer
636  * @return NULL on error
637  */
639  ff_asf_guid mediatype, ff_asf_guid subtype,
640  ff_asf_guid formattype, uint64_t size)
641 {
642  WtvContext *wtv = s->priv_data;
643  AVIOContext *pb = wtv->pb;
646  ff_asf_guid actual_subtype;
647  ff_asf_guid actual_formattype;
648 
649  if (size < 32) {
650  av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
651  avio_skip(pb, size);
652  return NULL;
653  }
654 
655  avio_skip(pb, size - 32);
656  ff_get_guid(pb, &actual_subtype);
657  ff_get_guid(pb, &actual_formattype);
658  avio_seek(pb, -size, SEEK_CUR);
659 
660  st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
661  avio_skip(pb, 32);
662  return st;
663  } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
664  st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
665  if (!st)
666  return NULL;
667  if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
668  int ret = ff_get_wav_header(s, pb, st->codecpar, size, 0);
669  if (ret < 0)
670  return NULL;
671  } else {
672  if (ff_guidcmp(formattype, ff_format_none))
673  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
674  avio_skip(pb, size);
675  }
676 
677  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
679  } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
680  if (st->codecpar->extradata && st->codecpar->extradata_size >= 22)
682  else
683  av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
684  } else {
686  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
687  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
688  }
689  return st;
690  } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
691  st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
692  if (!st)
693  return NULL;
694  if (!ff_guidcmp(formattype, ff_format_videoinfo2)) {
695  int consumed = parse_videoinfoheader2(s, st);
696  avio_skip(pb, FFMAX(size - consumed, 0));
697  } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
698  uint64_t consumed = parse_videoinfoheader2(s, st);
699  /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
700  avio_skip(pb, FFMAX(size - consumed, 0));
701  } else {
702  if (ff_guidcmp(formattype, ff_format_none))
703  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
704  avio_skip(pb, size);
705  }
706 
707  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
709  } else {
711  }
712  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
713  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
714  return st;
715  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
717  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
718  if (!st)
719  return NULL;
720  if (ff_guidcmp(formattype, ff_format_none))
721  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
722  avio_skip(pb, size);
724  return st;
725  } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
727  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
728  if (!st)
729  return NULL;
730  if (ff_guidcmp(formattype, ff_format_none))
731  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
732  avio_skip(pb, size);
734  return st;
735  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
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);
740  return NULL;
741  }
742 
743  av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
744  ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
745  FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
746  avio_skip(pb, size);
747  return NULL;
748 }
749 
750 enum {
753 };
754 
755 /**
756  * Try to seek over a broken chunk
757  * @return <0 on error
758  */
759 static int recover(WtvContext *wtv, uint64_t broken_pos)
760 {
761  AVIOContext *pb = wtv->pb;
762  int i;
763  for (i = 0; i < wtv->nb_index_entries; i++) {
764  if (wtv->index_entries[i].pos > broken_pos) {
765  int64_t ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
766  if (ret < 0)
767  return ret;
768  wtv->pts = wtv->index_entries[i].timestamp;
769  return 0;
770  }
771  }
772  return AVERROR(EIO);
773 }
774 
775 /**
776  * Parse WTV chunks
777  * @param mode SEEK_TO_DATA or SEEK_TO_PTS
778  * @param seekts timestamp
779  * @param[out] len_ptr Length of data chunk
780  * @return stream index of data chunk, or <0 on error
781  */
782 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
783 {
784  WtvContext *wtv = s->priv_data;
785  AVIOContext *pb = wtv->pb;
786  while (!avio_feof(pb)) {
787  ff_asf_guid g;
788  int len, sid, consumed;
789 
790  ff_get_guid(pb, &g);
791  len = avio_rl32(pb);
792  if (len < 32) {
793  int ret;
794  if (avio_feof(pb))
795  return AVERROR_EOF;
796  av_log(s, AV_LOG_WARNING, "encountered broken chunk\n");
797  if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0)
798  return ret;
799  continue;
800  }
801  sid = avio_rl32(pb) & 0x7FFF;
802  avio_skip(pb, 8);
803  consumed = 32;
804 
806  if (ff_find_stream_index(s, sid) < 0) {
807  ff_asf_guid mediatype, subtype, formattype;
808  int size;
809  avio_skip(pb, 28);
810  ff_get_guid(pb, &mediatype);
811  ff_get_guid(pb, &subtype);
812  avio_skip(pb, 12);
813  ff_get_guid(pb, &formattype);
814  size = avio_rl32(pb);
815  parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
816  consumed += 92 + size;
817  }
818  } else if (!ff_guidcmp(g, ff_stream2_guid)) {
819  int stream_index = ff_find_stream_index(s, sid);
820  if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
821  ff_asf_guid mediatype, subtype, formattype;
822  int size;
823  avio_skip(pb, 12);
824  ff_get_guid(pb, &mediatype);
825  ff_get_guid(pb, &subtype);
826  avio_skip(pb, 12);
827  ff_get_guid(pb, &formattype);
828  size = avio_rl32(pb);
829  parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
830  consumed += 76 + size;
831  }
838  int stream_index = ff_find_stream_index(s, sid);
839  if (stream_index >= 0) {
840  AVStream *st = s->streams[stream_index];
841  uint8_t buf[258];
842  const uint8_t *pbuf = buf;
843  int buf_size;
844 
845  avio_skip(pb, 8);
846  consumed += 8;
849  avio_skip(pb, 6);
850  consumed += 6;
851  }
852 
853  buf_size = FFMIN(len - consumed, sizeof(buf));
854  avio_read(pb, buf, buf_size);
855  consumed += buf_size;
856  ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
857  }
858  } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
859  int stream_index = ff_find_stream_index(s, sid);
860  if (stream_index >= 0) {
861  AVStream *st = s->streams[stream_index];
862  int audio_type;
863  avio_skip(pb, 8);
864  audio_type = avio_r8(pb);
865  if (audio_type == 2)
867  else if (audio_type == 3)
869  consumed += 9;
870  }
872  int stream_index = ff_find_stream_index(s, sid);
873  if (stream_index >= 0) {
874  avio_skip(pb, 12);
875  if (avio_rl32(pb))
876  av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
877  consumed += 16;
878  }
879  } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
880  int stream_index = ff_find_stream_index(s, sid);
881  if (stream_index >= 0) {
882  AVStream *st = s->streams[stream_index];
883  uint8_t language[4];
884  avio_skip(pb, 12);
885  avio_read(pb, language, 3);
886  if (language[0]) {
887  language[3] = 0;
888  av_dict_set(&st->metadata, "language", language, 0);
889  if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
891  }
892  consumed += 15;
893  }
894  } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
895  int stream_index = ff_find_stream_index(s, sid);
896  if (stream_index >= 0) {
897  avio_skip(pb, 8);
898  wtv->pts = avio_rl64(pb);
899  consumed += 16;
900  if (wtv->pts == -1)
901  wtv->pts = AV_NOPTS_VALUE;
902  else {
903  wtv->last_valid_pts = wtv->pts;
904  if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
905  wtv->epoch = wtv->pts;
906  if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
907  avio_skip(pb, WTV_PAD8(len) - consumed);
908  return 0;
909  }
910  }
911  }
912  } else if (!ff_guidcmp(g, ff_data_guid)) {
913  int stream_index = ff_find_stream_index(s, sid);
914  if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
915  WtvStream *wst = s->streams[stream_index]->priv_data;
916  wst->seen_data = 1;
917  if (len_ptr) {
918  *len_ptr = len;
919  }
920  return stream_index;
921  }
922  } 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})) {
923  int stream_index = ff_find_stream_index(s, sid);
924  if (stream_index >= 0)
925  av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index);
926  } else if (
927  !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}) ||
928  !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}) ||
929  !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}) ||
930  !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
931  !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}) ||
932  !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}) ||
933  !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}) ||
934  !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}) ||
935  !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}) ||
936  !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}) ||
937  !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}) ||
938  !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
939  !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
940  !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
941  !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
942  !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
943  !ff_guidcmp(g, ff_index_guid) ||
944  !ff_guidcmp(g, ff_sync_guid) ||
946  !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
947  //ignore known guids
948  } else
949  av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
950 
951  avio_skip(pb, WTV_PAD8(len) - consumed);
952  }
953  return AVERROR_EOF;
954 }
955 
957 {
958  WtvContext *wtv = s->priv_data;
959  unsigned root_sector;
960  int root_size;
961  uint8_t root[WTV_SECTOR_SIZE];
962  AVIOContext *pb;
963  int64_t timeline_pos;
964  int64_t ret;
965 
966  wtv->epoch =
967  wtv->pts =
969 
970  /* read root directory sector */
971  avio_skip(s->pb, 0x30);
972  root_size = avio_rl32(s->pb);
973  if (root_size > sizeof(root)) {
974  av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
975  return AVERROR_INVALIDDATA;
976  }
977  avio_skip(s->pb, 4);
978  root_sector = avio_rl32(s->pb);
979 
980  ret = seek_by_sector(s->pb, root_sector, 0);
981  if (ret < 0)
982  return ret;
983  root_size = avio_read(s->pb, root, root_size);
984  if (root_size < 0)
985  return AVERROR_INVALIDDATA;
986 
987  /* parse chunks up until first data chunk */
988  wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
989  if (!wtv->pb) {
990  av_log(s, AV_LOG_ERROR, "timeline data missing\n");
991  return AVERROR_INVALIDDATA;
992  }
993 
994  ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
995  if (ret < 0) {
996  wtvfile_close(wtv->pb);
997  return ret;
998  }
999  avio_seek(wtv->pb, -32, SEEK_CUR);
1000 
1001  timeline_pos = avio_tell(s->pb); // save before opening another file
1002 
1003  /* read metadata */
1004  pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
1005  if (pb) {
1006  parse_legacy_attrib(s, pb);
1007  wtvfile_close(pb);
1008  }
1009 
1010  s->ctx_flags |= AVFMTCTX_NOHEADER; // Needed for noStreams.wtv
1011 
1012  /* read seek index */
1013  if (s->nb_streams) {
1014  AVStream *st = s->streams[0];
1015  pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
1016  if (pb) {
1017  while(1) {
1018  uint64_t timestamp = avio_rl64(pb);
1019  uint64_t frame_nb = avio_rl64(pb);
1020  if (avio_feof(pb))
1021  break;
1023  0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1024  }
1025  wtvfile_close(pb);
1026 
1027  if (wtv->nb_index_entries) {
1028  pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
1029  if (pb) {
1030  AVIndexEntry *e = wtv->index_entries;
1031  AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1;
1032  uint64_t last_position = 0;
1033  while (1) {
1034  uint64_t frame_nb = avio_rl64(pb);
1035  uint64_t position = avio_rl64(pb);
1036  while (e <= e_end && frame_nb > e->size) {
1037  e->pos = last_position;
1038  e++;
1039  }
1040  if (avio_feof(pb))
1041  break;
1042  last_position = position;
1043  }
1044  e_end->pos = last_position;
1045  wtvfile_close(pb);
1046  st->duration = e_end->timestamp;
1047  }
1048  }
1049  }
1050  }
1051 
1052  avio_seek(s->pb, timeline_pos, SEEK_SET);
1053  return 0;
1054 }
1055 
1057 {
1058  WtvContext *wtv = s->priv_data;
1059  AVIOContext *pb = wtv->pb;
1060  int stream_index, len, ret;
1061 
1062  stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1063  if (stream_index < 0)
1064  return stream_index;
1065 
1066  ret = av_get_packet(pb, pkt, len - 32);
1067  if (ret < 0)
1068  return ret;
1069  pkt->stream_index = stream_index;
1070  pkt->pts = wtv->pts;
1071  avio_skip(pb, WTV_PAD8(len) - len);
1072  return 0;
1073 }
1074 
1075 static int read_seek(AVFormatContext *s, int stream_index,
1076  int64_t ts, int flags)
1077 {
1078  WtvContext *wtv = s->priv_data;
1079  AVIOContext *pb = wtv->pb;
1080  AVStream *st = s->streams[0];
1081  int64_t ts_relative;
1082  int i;
1083 
1084  if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1085  return AVERROR(ENOSYS);
1086 
1087  /* timestamp adjustment is required because wtv->pts values are absolute,
1088  * whereas AVIndexEntry->timestamp values are relative to epoch. */
1089  ts_relative = ts;
1090  if (wtv->epoch != AV_NOPTS_VALUE)
1091  ts_relative -= wtv->epoch;
1092 
1093  i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1094  if (i < 0) {
1095  if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1096  if (avio_seek(pb, 0, SEEK_SET) < 0)
1097  return -1;
1098  } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1099  if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1100  return -1;
1101  }
1102  if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1103  return AVERROR(ERANGE);
1104  return 0;
1105  }
1106  if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1107  return -1;
1108  wtv->pts = wtv->index_entries[i].timestamp;
1109  if (wtv->epoch != AV_NOPTS_VALUE)
1110  wtv->pts += wtv->epoch;
1111  wtv->last_valid_pts = wtv->pts;
1112  return 0;
1113 }
1114 
1116 {
1117  WtvContext *wtv = s->priv_data;
1118  av_freep(&wtv->index_entries);
1119  wtvfile_close(wtv->pb);
1120  return 0;
1121 }
1122 
1124  .name = "wtv",
1125  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1126  .priv_data_size = sizeof(WtvContext),
1130  .read_seek = read_seek,
1132  .flags = AVFMT_SHOW_IDS,
1133 };
const uint8_t ff_table_0_entries_time_le16[40]
Definition: wtv_common.c:56
static int recover(WtvContext *wtv, uint64_t broken_pos)
Try to seek over a broken chunk.
Definition: wtvdec.c:759
#define WTV_SECTOR_BITS
Definition: wtv.h:28
const ff_asf_guid ff_metadata_guid
Definition: wtv_common.c:62
static const ff_asf_guid mediasubtype_mpeg2_sections
Definition: wtvdec.c:370
#define NULL
Definition: coverity.c:32
const ff_asf_guid ff_SBE2_STREAM_DESC_EVENT
Definition: wtv_common.c:33
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:334
int size
#define WTV_BIGSECTOR_BITS
Definition: wtv.h:30
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent
Definition: wtvdec.c:340
int64_t pts
pts for next data chunk
Definition: wtvdec.c:321
static int read_ints(AVIOContext *pb, uint32_t *data, int count)
read non-zero integers (le32) from input stream
Definition: wtvdec.c:134
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3158
int64_t epoch
Definition: wtvdec.c:320
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define FF_ARG_GUID(g)
Definition: riff.h:105
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:4938
const char * g
Definition: vf_curves.c:115
int64_t position
Definition: wtvdec.c:58
int64_t pos
Definition: avformat.h:805
static const ff_asf_guid mediatype_mstvcaption
Definition: wtvdec.c:360
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int sector_bits
sector shift bits; used to convert sector number into pb_filesystem offset
Definition: wtvdec.c:53
int index
stream index in AVFormatContext
Definition: avformat.h:877
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
enum AVMediaType codec_type
Definition: rtp.c:37
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
parse VIDEOINFOHEADER2 structure
Definition: wtvdec.c:561
const ff_asf_guid ff_mediatype_video
Definition: wtv_common.c:43
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:834
int error
Definition: wtvdec.c:57
void * priv_data
Definition: avformat.h:891
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:233
const char * key
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
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:2054
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
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.
const ff_asf_guid ff_format_waveformatex
Definition: wtv_common.c:74
int seen_data
Definition: wtvdec.c:315
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:460
const AVCodecGuid ff_codec_wav_guids[]
Definition: riff.c:618
Format I/O context.
Definition: avformat.h:1351
#define gmtime_r
Definition: time_internal.h:34
#define AV_RL64
Definition: intreadwrite.h:173
static const ff_asf_guid mediatype_mpeg2_sections
Definition: wtvdec.c:356
#define PRI_PRETTY_GUID
Definition: wtvdec.c:40
const ff_asf_guid ff_data_guid
Definition: wtv_common.c:31
static char buffer[20]
Definition: seek.c:32
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wtvdec.c:1056
#define av_malloc(s)
#define FF_MEDIASUBTYPE_BASE_GUID
Definition: riff.h:111
static int read_header(AVFormatContext *s)
Definition: wtvdec.c:956
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1295
enum AVStreamParseType need_parsing
Definition: avformat.h:1094
int id
Format-specific stream ID.
Definition: avformat.h:883
int64_t length
Definition: wtvdec.c:59
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
const ff_asf_guid ff_mediatype_audio
Definition: wtv_common.c:41
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
const ff_asf_guid ff_mediasubtype_cpfilters_processed
Definition: wtv_common.c:68
const char data[16]
Definition: mxf.c:91
#define AVERROR_EOF
End of file.
Definition: error.h:55
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
Definition: wtvdec.c:462
static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
Convert OLE DATE to ISO-8601 string.
Definition: wtvdec.c:414
static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
Definition: wtvdec.c:62
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:304
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
const ff_asf_guid ff_sync_guid
Definition: wtv_common.c:37
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
static int read_close(AVFormatContext *s)
Definition: wtvdec.c:1115
#define AVINDEX_KEYFRAME
Definition: avformat.h:812
const uint8_t ff_table_0_entries_legacy_attrib_le16[58]
Definition: wtv_common.c:54
Definition: wtvdec.c:50
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:126
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
Initialise stream.
Definition: wtvdec.c:604
AVInputFormat ff_wtv_demuxer
Definition: wtvdec.c:1123
AVIOContext * pb_filesystem
file system (AVFormatContext->pb)
Definition: wtvdec.c:51
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
#define AVERROR(e)
Definition: error.h:43
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:806
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
unsigned int pos
Definition: spdifenc.c:410
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:411
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
Definition: wtvdec.c:426
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riffdec.c:32
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
#define FFMAX(a, b)
Definition: common.h:94
const uint8_t ff_timeline_table_0_entries_Events_le16[62]
Definition: wtv_common.c:52
#define LEN_PRETTY_GUID
Definition: wtvdec.c:44
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
AVIOContext * pb
timeline file
Definition: wtvdec.c:319
#define wtvfile_open(s, buf, buf_size, filename)
Definition: wtvdec.c:295
const ff_asf_guid ff_format_cpfilters_processed
Definition: wtv_common.c:72
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert win32 FILETIME to ISO-8601 string.
Definition: wtvdec.c:382
const char * name
Definition: qsvenc.c:46
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:5022
audio channel layout utility functions
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent
Definition: wtvdec.c:342
#define FFMIN(a, b)
Definition: common.h:96
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
static const ff_asf_guid mediatype_mpeg2_pes
Definition: wtvdec.c:358
int depth
Definition: wtvenc.c:72
const uint8_t ff_timeline_le16[16]
Definition: wtv_common.c:50
static const ff_asf_guid mediasubtype_mpeg1payload
Definition: wtvdec.c:354
#define WTV_PAD8(x)
Definition: wtv.h:31
const ff_asf_guid ff_timestamp_guid
Definition: wtv_common.c:29
#define s(width, name)
Definition: cbs_vp9.c:257
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
Parse WTV chunks.
Definition: wtvdec.c:782
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
Parse metadata entries.
Definition: wtvdec.c:534
#define AV_RL32
Definition: intreadwrite.h:146
static void wtvfile_close(AVIOContext *pb)
Close file opened with wtvfile_open_sector(), or wtv_open()
Definition: wtvdec.c:301
AVDictionary * metadata
Definition: avformat.h:940
const ff_asf_guid ff_format_mpeg2_video
Definition: wtv_common.c:76
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:398
static const ff_asf_guid EVENTID_StreamIDSpanningEvent
Definition: wtvdec.c:344
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent
Definition: wtvdec.c:338
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:844
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
Definition: wtvdec.c:348
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:835
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: wtvdec.c:70
uint8_t ff_asf_guid[16]
Definition: riff.h:92
Stream structure.
Definition: avformat.h:876
const ff_asf_guid ff_DSATTRIB_TRANSPORT_PROPERTIES
Definition: wtv_common.c:60
static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent
Definition: wtvdec.c:336
#define WTV_SECTOR_SIZE
Definition: wtv.h:29
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:1986
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
int first_sector
Definition: wtvenc.c:73
#define AV_RN16(p)
Definition: intreadwrite.h:360
static const ff_asf_guid EVENTID_SubtitleSpanningEvent
Definition: wtvdec.c:332
int nb_index_entries
Definition: wtvdec.c:327
static const ff_asf_guid mediasubtype_teletext
Definition: wtvdec.c:366
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
const ff_asf_guid ff_index_guid
Definition: wtv_common.c:39
double value
Definition: eval.c:98
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:638
const AVCodecGuid ff_video_guids[]
Definition: wtv_common.c:81
static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
Definition: wtvdec.c:108
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2513
cl_device_type type
const AVMetadataConv ff_asf_metadata_conv[]
Definition: asf.c:159
#define snprintf
Definition: snprintf.h:34
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
unsigned int index_entries_allocated_size
Definition: wtvdec.c:328
static int read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: wtvdec.c:1075
#define flags(name, subs,...)
Definition: cbs_av1.c:564
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:1777
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
full parsing and repack
Definition: avformat.h:795
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
Main libavformat public API header.
static void parse_mpeg1waveformatex(AVStream *st)
Parse MPEG1WAVEFORMATEX extradata structure.
Definition: wtvdec.c:575
const ff_asf_guid ff_stream2_guid
Definition: wtv_common.c:64
enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
Definition: riffdec.c:44
const ff_asf_guid ff_dir_entry_guid
Definition: wtv_common.c:25
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
Definition: riffdec.c:192
static AVIOContext * wtvfile_open_sector(unsigned first_sector, uint64_t length, int depth, AVFormatContext *s)
Open file.
Definition: wtvdec.c:151
#define FF_PRI_GUID
Definition: riff.h:101
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:143
#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 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
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
static const ff_asf_guid mediasubtype_dtvccdata
Definition: wtvdec.c:368
const ff_asf_guid ff_format_videoinfo2
Definition: wtv_common.c:78
const ff_asf_guid ff_wtv_guid
Definition: wtv_common.c:27
int64_t last_valid_pts
latest valid pts, used for interactive seeking
Definition: wtvdec.c:322
#define av_free(p)
uint32_t * sectors
file allocation table
Definition: wtvdec.c:54
static const ff_asf_guid EVENTID_LanguageSpanningEvent
Definition: wtvdec.c:334
int len
static const ff_asf_guid mediasubtype_dvb_subtitle
Definition: wtvdec.c:364
void * priv_data
Format private data.
Definition: avformat.h:1379
const ff_asf_guid ff_format_none
Definition: wtv_common.c:45
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:2515
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int channels
Audio only.
Definition: codec_par.h:166
static const ff_asf_guid EVENTID_TeletextSpanningEvent
Definition: wtvdec.c:346
#define av_freep(p)
static int read_probe(const AVProbeData *p)
Definition: wtvdec.c:373
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
const ff_asf_guid ff_stream1_guid
Definition: wtv_common.c:35
int stream_index
Definition: packet.h:357
int nb_sectors
number of sectors
Definition: wtvdec.c:55
#define AV_CH_LAYOUT_MONO
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
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:118
This structure stores compressed data.
Definition: packet.h:332
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:755
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
#define ARG_PRETTY_GUID(g)
Definition: wtvdec.c:42
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:958
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
AVIndexEntry * index_entries
Definition: wtvdec.c:326