Libav
wtv.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 Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/intfloat.h"
31 #include "libavutil/dict.h"
32 #include "avformat.h"
33 #include "internal.h"
34 #include "riff.h"
35 #include "asf.h"
36 #include "mpegts.h"
37 
38 /* Macros for formating GUIDs */
39 #define PRI_PRETTY_GUID \
40  "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"
41 #define ARG_PRETTY_GUID(g) \
42  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]
43 #define LEN_PRETTY_GUID 34
44 
45 /*
46  *
47  * File system routines
48  *
49  */
50 
51 #define WTV_SECTOR_BITS 12
52 #define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS)
53 #define WTV_BIGSECTOR_BITS 18
54 
55 #define SHIFT_SECTOR_BITS(a) ((int64_t)(a) << WTV_SECTOR_BITS)
56 
57 typedef struct {
61  uint32_t *sectors;
62  int nb_sectors;
64  int error;
65  int64_t position;
66  int64_t length;
67 } WtvFile;
68 
69 static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
70 {
71  return avio_seek(pb, SHIFT_SECTOR_BITS(sector) + offset, SEEK_SET);
72 }
73 
77 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
78 {
79  WtvFile *wf = opaque;
80  AVIOContext *pb = wf->pb_filesystem;
81  int nread = 0;
82 
83  if (wf->error || pb->error)
84  return -1;
85  if (wf->position >= wf->length || pb->eof_reached)
86  return 0;
87 
88  buf_size = FFMIN(buf_size, wf->length - wf->position);
89  while(nread < buf_size) {
90  int n;
91  int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
92  int read_request = FFMIN(buf_size - nread, remaining_in_sector);
93 
94  n = avio_read(pb, buf, read_request);
95  if (n <= 0)
96  break;
97  nread += n;
98  buf += n;
99  wf->position += n;
100  if (n == remaining_in_sector) {
101  int i = wf->position >> wf->sector_bits;
102  if (i >= wf->nb_sectors ||
103  (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
104  seek_by_sector(pb, wf->sectors[i], 0) < 0)) {
105  wf->error = 1;
106  break;
107  }
108  }
109  }
110  return nread;
111 }
112 
116 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
117 {
118  WtvFile *wf = opaque;
119  AVIOContext *pb = wf->pb_filesystem;
120 
121  if (whence == AVSEEK_SIZE)
122  return wf->length;
123  else if (whence == SEEK_CUR)
124  offset = wf->position + offset;
125  else if (whence == SEEK_END)
126  offset = wf->length;
127 
128  wf->error = offset < 0 || offset >= wf->length ||
129  seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits],
130  offset & ((1 << wf->sector_bits) - 1)) < 0;
131  wf->position = offset;
132  return offset;
133 }
134 
142 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
143 {
144  int i, total = 0;
145  for (i = 0; i < count; i++) {
146  if ((data[total] = avio_rl32(pb)))
147  total++;
148  }
149  return total;
150 }
151 
159 static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
160 {
161  AVIOContext *pb;
162  WtvFile *wf;
163  uint8_t *buffer;
164 
165  if (seek_by_sector(s->pb, first_sector, 0) < 0)
166  return NULL;
167 
168  wf = av_mallocz(sizeof(WtvFile));
169  if (!wf)
170  return NULL;
171 
172  if (depth == 0) {
173  wf->sectors = av_malloc(sizeof(uint32_t));
174  if (!wf->sectors) {
175  av_free(wf);
176  return NULL;
177  }
178  wf->sectors[0] = first_sector;
179  wf->nb_sectors = 1;
181  } else if (depth == 1) {
183  if (!wf->sectors) {
184  av_free(wf);
185  return NULL;
186  }
187  wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
188  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
189  } else if (depth == 2) {
190  uint32_t sectors1[WTV_SECTOR_SIZE / 4];
191  int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
192  int i;
193 
194  wf->sectors = av_malloc(SHIFT_SECTOR_BITS(nb_sectors1));
195  if (!wf->sectors) {
196  av_free(wf);
197  return NULL;
198  }
199  wf->nb_sectors = 0;
200  for (i = 0; i < nb_sectors1; i++) {
201  if (seek_by_sector(s->pb, sectors1[i], 0) < 0)
202  break;
203  wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
204  }
205  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
206  } else {
207  av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
208  av_free(wf);
209  return NULL;
210  }
211 
212  if (!wf->nb_sectors) {
213  av_free(wf->sectors);
214  av_free(wf);
215  return NULL;
216  }
217 
218  /* check length */
219  length &= 0xFFFFFFFFFFFF;
220  if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
221  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);
222  length = (int64_t)wf->nb_sectors << wf->sector_bits;
223  }
224  wf->length = length;
225 
226  /* seek to initial sector */
227  wf->position = 0;
228  if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) {
229  av_free(wf->sectors);
230  av_free(wf);
231  return NULL;
232  }
233 
234  wf->pb_filesystem = s->pb;
235  buffer = av_malloc(1 << wf->sector_bits);
236  if (!buffer) {
237  av_free(wf->sectors);
238  av_free(wf);
239  return NULL;
240  }
241 
242  pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
244  if (!pb) {
245  av_free(buffer);
246  av_free(wf->sectors);
247  av_free(wf);
248  }
249  return pb;
250 }
251 
253  {0x92,0xB7,0x74,0x91,0x59,0x70,0x70,0x44,0x88,0xDF,0x06,0x3B,0x82,0xCC,0x21,0x3D};
254 
263 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
264 {
265  const uint8_t *buf_end = buf + buf_size;
266 
267  while(buf + 48 <= buf_end) {
268  int dir_length, name_size, first_sector, depth;
269  uint64_t file_length;
270  const uint8_t *name;
271  if (ff_guidcmp(buf, dir_entry_guid)) {
272  av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; "
273  "remaining directory entries ignored\n", FF_ARG_GUID(buf));
274  break;
275  }
276  dir_length = AV_RL16(buf + 16);
277  file_length = AV_RL64(buf + 24);
278  name_size = 2 * AV_RL32(buf + 32);
279  if (name_size < 0) {
280  av_log(s, AV_LOG_ERROR,
281  "bad filename length, remaining directory entries ignored\n");
282  break;
283  }
284  if (48 + name_size > buf_end - buf) {
285  av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
286  break;
287  }
288  first_sector = AV_RL32(buf + 40 + name_size);
289  depth = AV_RL32(buf + 44 + name_size);
290 
291  /* compare file name; test optional null terminator */
292  name = buf + 40;
293  if (name_size >= filename_size &&
294  !memcmp(name, filename, filename_size) &&
295  (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
296  return wtvfile_open_sector(first_sector, file_length, depth, s);
297 
298  buf += dir_length;
299  }
300  return 0;
301 }
302 
303 #define wtvfile_open(s, buf, buf_size, filename) \
304  wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
305 
309 static void wtvfile_close(AVIOContext *pb)
310 {
311  WtvFile *wf = pb->opaque;
312  av_free(wf->sectors);
313  av_free(wf);
314  av_free(pb->buffer);
315  av_free(pb);
316 }
317 
318 /*
319  *
320  * Main demuxer
321  *
322  */
323 
324 typedef struct {
326 } WtvStream;
327 
328 typedef struct {
330  int64_t epoch;
331  int64_t pts;
332  int64_t last_valid_pts;
334  /* maintain private seek index, as the AVIndexEntry->pos is relative to the
335  start of the 'timeline' file, not the file system (AVFormatContext->pb) */
339 } WtvContext;
340 
341 /* WTV GUIDs */
342 static const ff_asf_guid wtv_guid =
343  {0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
345  {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
347  {0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
348 static const ff_asf_guid data_guid =
349  {0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
350 static const ff_asf_guid stream_guid =
351  {0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
352 static const ff_asf_guid stream2_guid =
353  {0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
355  {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
357  {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
359  {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
361  {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
363  {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
365  {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
367  {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
369  {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
371  {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
372 
373 /* Windows media GUIDs */
374 
375 /* Media types */
377  {'a','u','d','s',FF_MEDIASUBTYPE_BASE_GUID};
379  {'v','i','d','s',FF_MEDIASUBTYPE_BASE_GUID};
381  {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
383  {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
385  {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
387  {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
388 
389 /* Media subtypes */
391  {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
393  {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
395  {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
397  {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
399  {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
400 
401 /* Formats */
403  {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
405  {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
407  {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
409  {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
410 static const ff_asf_guid format_none =
411  {0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
412 
413 static const AVCodecGuid video_guids[] = {
414  {AV_CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
416 };
417 
418 static int read_probe(AVProbeData *p)
419 {
420  return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
421 }
422 
426 static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
427 {
428  time_t t = (value / 10000000LL) - 11644473600LL;
429  struct tm *tm = gmtime(&t);
430  if (tm)
431  strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
432  else
433  buf[0] = '\0';
434 }
435 
439 static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
440 {
441  time_t t = (value / 10000000LL) - 719162LL*86400LL;
442  struct tm *tm = gmtime(&t);
443  if (tm)
444  strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
445  else
446  buf[0] = '\0';
447 }
448 
452 static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
453 {
454  time_t t = 631112400LL + 86400*av_int2double(value);
455  struct tm *tm = gmtime(&t);
456  if (tm)
457  strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
458  else
459  buf[0] = '\0';
460 }
461 
462 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
463 {
464  char mime[1024];
465  char description[1024];
466  unsigned int filesize;
467  AVStream *st;
468  int64_t pos = avio_tell(pb);
469 
470  avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
471  if (strcmp(mime, "image/jpeg"))
472  goto done;
473 
474  avio_r8(pb);
475  avio_get_str16le(pb, INT_MAX, description, sizeof(description));
476  filesize = avio_rl32(pb);
477  if (!filesize)
478  goto done;
479 
480  st = avformat_new_stream(s, NULL);
481  if (!st)
482  goto done;
483  av_dict_set(&st->metadata, "title", description, 0);
486  st->codec->extradata = av_mallocz(filesize);
487  st->id = -1;
488  if (!st->codec->extradata)
489  goto done;
490  st->codec->extradata_size = filesize;
491  avio_read(pb, st->codec->extradata, filesize);
492 done:
493  avio_seek(pb, pos + length, SEEK_SET);
494 }
495 
496 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
497 {
498  int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
499  char *buf = av_malloc(buf_size);
500  if (!buf)
501  return;
502 
503  if (type == 0 && length == 4) {
504  snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
505  } else if (type == 1) {
506  avio_get_str16le(pb, length, buf, buf_size);
507  if (!strlen(buf)) {
508  av_free(buf);
509  return;
510  }
511  } else if (type == 3 && length == 4) {
512  strcpy(buf, avio_rl32(pb) ? "true" : "false");
513  } else if (type == 4 && length == 8) {
514  int64_t num = avio_rl64(pb);
515  if (!strcmp(key, "WM/EncodingTime") ||
516  !strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
517  filetime_to_iso8601(buf, buf_size, num);
518  else if (!strcmp(key, "WM/WMRVEncodeTime") ||
519  !strcmp(key, "WM/WMRVEndTime"))
520  crazytime_to_iso8601(buf, buf_size, num);
521  else if (!strcmp(key, "WM/WMRVExpirationDate"))
522  oledate_to_iso8601(buf, buf_size, num);
523  else if (!strcmp(key, "WM/WMRVBitrate"))
524  snprintf(buf, buf_size, "%f", av_int2double(num));
525  else
526  snprintf(buf, buf_size, "%"PRIi64, num);
527  } else if (type == 5 && length == 2) {
528  snprintf(buf, buf_size, "%u", avio_rl16(pb));
529  } else if (type == 6 && length == 16) {
530  ff_asf_guid guid;
531  avio_read(pb, guid, 16);
532  snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
533  } else if (type == 2 && !strcmp(key, "WM/Picture")) {
534  get_attachment(s, pb, length);
535  av_freep(&buf);
536  return;
537  } else {
538  av_freep(&buf);
539  av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
540  avio_skip(pb, length);
541  return;
542  }
543 
544  av_dict_set(&s->metadata, key, buf, 0);
545  av_freep(&buf);
546 }
547 
552 {
553  ff_asf_guid guid;
554  int length, type;
555  while(!pb->eof_reached) {
556  char key[1024];
557  ff_get_guid(pb, &guid);
558  type = avio_rl32(pb);
559  length = avio_rl32(pb);
560  if (!length)
561  break;
562  if (ff_guidcmp(&guid, metadata_guid)) {
563  av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
564  "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
565  break;
566  }
567  avio_get_str16le(pb, INT_MAX, key, sizeof(key));
568  get_tag(s, pb, key, type, length);
569  }
570 
572 }
573 
579 {
580  WtvContext *wtv = s->priv_data;
581  AVIOContext *pb = wtv->pb;
582 
583  avio_skip(pb, 72); // picture aspect ratio is unreliable
584  ff_get_bmp_header(pb, st);
585 
586  return 72 + 40;
587 }
588 
593 {
594  /* fwHeadLayer */
595  switch (AV_RL16(st->codec->extradata)) {
596  case 0x0001 : st->codec->codec_id = AV_CODEC_ID_MP1; break;
597  case 0x0002 : st->codec->codec_id = AV_CODEC_ID_MP2; break;
598  case 0x0004 : st->codec->codec_id = AV_CODEC_ID_MP3; break;
599  }
600 
601  st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
602 
603  /* dwHeadMode */
604  switch (AV_RL16(st->codec->extradata + 6)) {
605  case 1 :
606  case 2 :
607  case 4 : st->codec->channels = 2;
609  break;
610  case 8 : st->codec->channels = 1;
612  break;
613  }
614 }
615 
621 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
622 {
623  if (st) {
624  if (st->codec->extradata) {
625  av_freep(&st->codec->extradata);
626  st->codec->extradata_size = 0;
627  }
628  } else {
629  WtvStream *wst = av_mallocz(sizeof(WtvStream));
630  if (!wst)
631  return NULL;
632  st = avformat_new_stream(s, NULL);
633  if (!st)
634  return NULL;
635  st->id = sid;
636  st->priv_data = wst;
637  }
638  st->codec->codec_type = codec_type;
640  avpriv_set_pts_info(st, 64, 1, 10000000);
641  return st;
642 }
643 
654  ff_asf_guid mediatype, ff_asf_guid subtype,
655  ff_asf_guid formattype, int size)
656 {
657  WtvContext *wtv = s->priv_data;
658  AVIOContext *pb = wtv->pb;
660  !ff_guidcmp(formattype, format_cpfilters_processed)) {
661  ff_asf_guid actual_subtype;
662  ff_asf_guid actual_formattype;
663 
664  if (size < 32) {
665  av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
666  avio_skip(pb, size);
667  return NULL;
668  }
669 
670  avio_skip(pb, size - 32);
671  ff_get_guid(pb, &actual_subtype);
672  ff_get_guid(pb, &actual_formattype);
673  avio_seek(pb, -size, SEEK_CUR);
674 
675  st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
676  avio_skip(pb, 32);
677  return st;
678  } else if (!ff_guidcmp(mediatype, mediatype_audio)) {
679  st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
680  if (!st)
681  return NULL;
682  if (!ff_guidcmp(formattype, format_waveformatex)) {
683  int ret = ff_get_wav_header(pb, st->codec, size);
684  if (ret < 0)
685  return NULL;
686  } else {
687  if (ff_guidcmp(formattype, format_none))
688  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
689  avio_skip(pb, size);
690  }
691 
692  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
694  } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
695  if (st->codec->extradata && st->codec->extradata_size >= 22)
697  else
698  av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
699  } else {
701  if (st->codec->codec_id == AV_CODEC_ID_NONE)
702  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
703  }
704  return st;
705  } else if (!ff_guidcmp(mediatype, mediatype_video)) {
706  st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
707  if (!st)
708  return NULL;
709  if (!ff_guidcmp(formattype, format_videoinfo2)) {
710  int consumed = parse_videoinfoheader2(s, st);
711  avio_skip(pb, FFMAX(size - consumed, 0));
712  } else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
713  int consumed = parse_videoinfoheader2(s, st);
714  avio_skip(pb, FFMAX(size - consumed, 0));
715  } else {
716  if (ff_guidcmp(formattype, format_none))
717  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
718  avio_skip(pb, size);
719  }
720 
721  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
723  } else {
724  st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype);
725  }
726  if (st->codec->codec_id == AV_CODEC_ID_NONE)
727  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
728  return st;
729  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
731  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
732  if (!st)
733  return NULL;
734  if (ff_guidcmp(formattype, format_none))
735  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
736  avio_skip(pb, size);
738  return st;
739  } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
741  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
742  if (!st)
743  return NULL;
744  if (ff_guidcmp(formattype, format_none))
745  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
746  avio_skip(pb, size);
748  return st;
749  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
751  if (ff_guidcmp(formattype, format_none))
752  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
753  avio_skip(pb, size);
754  return NULL;
755  }
756 
757  av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
758  ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
759  FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
760  avio_skip(pb, size);
761  return NULL;
762 }
763 
764 enum {
767 };
768 
776 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
777 {
778  WtvContext *wtv = s->priv_data;
779  AVIOContext *pb = wtv->pb;
780  while (!pb->eof_reached) {
781  ff_asf_guid g;
782  int len, sid, consumed;
783 
784  ff_get_guid(pb, &g);
785  len = avio_rl32(pb);
786  if (len < 32)
787  break;
788  sid = avio_rl32(pb) & 0x7FFF;
789  avio_skip(pb, 8);
790  consumed = 32;
791 
792  if (!ff_guidcmp(g, stream_guid)) {
793  if (ff_find_stream_index(s, sid) < 0) {
794  ff_asf_guid mediatype, subtype, formattype;
795  int size;
796  avio_skip(pb, 28);
797  ff_get_guid(pb, &mediatype);
798  ff_get_guid(pb, &subtype);
799  avio_skip(pb, 12);
800  ff_get_guid(pb, &formattype);
801  size = avio_rl32(pb);
802  parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
803  consumed += 92 + size;
804  }
805  } else if (!ff_guidcmp(g, stream2_guid)) {
806  int stream_index = ff_find_stream_index(s, sid);
807  if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
808  ff_asf_guid mediatype, subtype, formattype;
809  int size;
810  avio_skip(pb, 12);
811  ff_get_guid(pb, &mediatype);
812  ff_get_guid(pb, &subtype);
813  avio_skip(pb, 12);
814  ff_get_guid(pb, &formattype);
815  size = avio_rl32(pb);
816  parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
817  consumed += 76 + size;
818  }
825  int stream_index = ff_find_stream_index(s, sid);
826  if (stream_index >= 0) {
827  AVStream *st = s->streams[stream_index];
828  uint8_t buf[258];
829  const uint8_t *pbuf = buf;
830  int buf_size;
831 
832  avio_skip(pb, 8);
833  consumed += 8;
836  avio_skip(pb, 6);
837  consumed += 6;
838  }
839 
840  buf_size = FFMIN(len - consumed, sizeof(buf));
841  avio_read(pb, buf, buf_size);
842  consumed += buf_size;
843  ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
844  }
845  } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
846  int stream_index = ff_find_stream_index(s, sid);
847  if (stream_index >= 0) {
848  AVStream *st = s->streams[stream_index];
849  int audio_type;
850  avio_skip(pb, 8);
851  audio_type = avio_r8(pb);
852  if (audio_type == 2)
854  else if (audio_type == 3)
856  consumed += 9;
857  }
859  int stream_index = ff_find_stream_index(s, sid);
860  if (stream_index >= 0) {
861  avio_skip(pb, 12);
862  if (avio_rl32(pb))
863  av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
864  consumed += 16;
865  }
866  } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
867  int stream_index = ff_find_stream_index(s, sid);
868  if (stream_index >= 0) {
869  AVStream *st = s->streams[stream_index];
870  uint8_t language[4];
871  avio_skip(pb, 12);
872  avio_read(pb, language, 3);
873  if (language[0]) {
874  language[3] = 0;
875  av_dict_set(&st->metadata, "language", language, 0);
876  if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
878  }
879  consumed += 15;
880  }
881  } else if (!ff_guidcmp(g, timestamp_guid)) {
882  int stream_index = ff_find_stream_index(s, sid);
883  if (stream_index >= 0) {
884  avio_skip(pb, 8);
885  wtv->pts = avio_rl64(pb);
886  consumed += 16;
887  if (wtv->pts == -1)
888  wtv->pts = AV_NOPTS_VALUE;
889  else {
890  wtv->last_valid_pts = wtv->pts;
891  if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
892  wtv->epoch = wtv->pts;
893  if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
894 #define WTV_PAD8(x) (((x) + 7) & ~7)
895  avio_skip(pb, WTV_PAD8(len) - consumed);
896  return 0;
897  }
898  }
899  }
900  } else if (!ff_guidcmp(g, data_guid)) {
901  int stream_index = ff_find_stream_index(s, sid);
902  if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) {
903  WtvStream *wst = s->streams[stream_index]->priv_data;
904  wst->seen_data = 1;
905  if (len_ptr) {
906  *len_ptr = len;
907  }
908  return stream_index;
909  }
910  } else if (
911  !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}) ||
912  !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}) ||
913  !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) ||
914  !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}) ||
915  !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}) ||
916  !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}) ||
917  !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}) ||
918  !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}) ||
919  !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}) ||
920  !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}) ||
921  !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
922  !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
923  !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
924  !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
925  !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
926  !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
927  !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
928  !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
929  //ignore known guids
930  } else
931  av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
932 
933  avio_skip(pb, WTV_PAD8(len) - consumed);
934  }
935  return AVERROR_EOF;
936 }
937 
938 /* declare utf16le strings */
939 #define _ , 0,
940 static const uint8_t timeline_le16[] =
941  {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
943  {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
945  {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
947  {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e'_'.'_'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'E'_'v'_'e'_'n'_'t'_'s', 0};
948 #undef _
949 
951 {
952  WtvContext *wtv = s->priv_data;
953  int root_sector, root_size;
954  uint8_t root[WTV_SECTOR_SIZE];
955  AVIOContext *pb;
956  int64_t timeline_pos;
957  int ret;
958 
959  wtv->epoch =
960  wtv->pts =
962 
963  /* read root directory sector */
964  avio_skip(s->pb, 0x30);
965  root_size = avio_rl32(s->pb);
966  if (root_size > sizeof(root)) {
967  av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
968  return AVERROR_INVALIDDATA;
969  }
970  avio_skip(s->pb, 4);
971  root_sector = avio_rl32(s->pb);
972 
973  seek_by_sector(s->pb, root_sector, 0);
974  root_size = avio_read(s->pb, root, root_size);
975  if (root_size < 0)
976  return AVERROR_INVALIDDATA;
977 
978  /* parse chunks up until first data chunk */
979  wtv->pb = wtvfile_open(s, root, root_size, timeline_le16);
980  if (!wtv->pb) {
981  av_log(s, AV_LOG_ERROR, "timeline data missing\n");
982  return AVERROR_INVALIDDATA;
983  }
984 
985  ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
986  if (ret < 0)
987  return ret;
988  avio_seek(wtv->pb, -32, SEEK_CUR);
989 
990  timeline_pos = avio_tell(s->pb); // save before opening another file
991 
992  /* read metadata */
993  pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16);
994  if (pb) {
995  parse_legacy_attrib(s, pb);
996  wtvfile_close(pb);
997  }
998 
999  /* read seek index */
1000  if (s->nb_streams) {
1001  AVStream *st = s->streams[0];
1002  pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16);
1003  if (pb) {
1004  while(1) {
1005  uint64_t timestamp = avio_rl64(pb);
1006  uint64_t frame_nb = avio_rl64(pb);
1007  if (pb->eof_reached)
1008  break;
1010  0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1011  }
1012  wtvfile_close(pb);
1013 
1014  if (wtv->nb_index_entries) {
1015  pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16);
1016  if (pb) {
1017  int i;
1018  while (1) {
1019  uint64_t frame_nb = avio_rl64(pb);
1020  uint64_t position = avio_rl64(pb);
1021  if (pb->eof_reached)
1022  break;
1023  for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
1024  AVIndexEntry *e = wtv->index_entries + i;
1025  if (frame_nb > e->size)
1026  break;
1027  if (position > e->pos)
1028  e->pos = position;
1029  }
1030  }
1031  wtvfile_close(pb);
1032  st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
1033  }
1034  }
1035  }
1036  }
1037 
1038  avio_seek(s->pb, timeline_pos, SEEK_SET);
1039  return 0;
1040 }
1041 
1043 {
1044  WtvContext *wtv = s->priv_data;
1045  AVIOContext *pb = wtv->pb;
1046  int stream_index, len, ret;
1047 
1048  stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1049  if (stream_index < 0)
1050  return stream_index;
1051 
1052  ret = av_get_packet(pb, pkt, len - 32);
1053  if (ret < 0)
1054  return ret;
1055  pkt->stream_index = stream_index;
1056  pkt->pts = wtv->pts;
1057  avio_skip(pb, WTV_PAD8(len) - len);
1058  return 0;
1059 }
1060 
1061 static int read_seek(AVFormatContext *s, int stream_index,
1062  int64_t ts, int flags)
1063 {
1064  WtvContext *wtv = s->priv_data;
1065  AVIOContext *pb = wtv->pb;
1066  AVStream *st = s->streams[0];
1067  int64_t ts_relative;
1068  int i;
1069 
1070  if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1071  return AVERROR(ENOSYS);
1072 
1073  /* timestamp adjustment is required because wtv->pts values are absolute,
1074  * whereas AVIndexEntry->timestamp values are relative to epoch. */
1075  ts_relative = ts;
1076  if (wtv->epoch != AV_NOPTS_VALUE)
1077  ts_relative -= wtv->epoch;
1078 
1079  i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1080  if (i < 0) {
1081  if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
1082  avio_seek(pb, 0, SEEK_SET);
1083  else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
1084  avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
1085  if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1086  return AVERROR(ERANGE);
1087  return 0;
1088  }
1089  wtv->pts = wtv->index_entries[i].timestamp;
1090  if (wtv->epoch != AV_NOPTS_VALUE)
1091  wtv->pts += wtv->epoch;
1092  wtv->last_valid_pts = wtv->pts;
1093  avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
1094  return 0;
1095 }
1096 
1098 {
1099  WtvContext *wtv = s->priv_data;
1100  av_free(wtv->index_entries);
1101  wtvfile_close(wtv->pb);
1102  return 0;
1103 }
1104 
1106  .name = "wtv",
1107  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1108  .priv_data_size = sizeof(WtvContext),
1112  .read_seek = read_seek,
1114  .flags = AVFMT_SHOW_IDS,
1115 };
#define PRI_PRETTY_GUID
Definition: wtv.c:39
#define WTV_BIGSECTOR_BITS
Definition: wtv.c:53
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
Definition: wtv.c:69
Bytestream IO Context.
Definition: avio.h:68
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
static const ff_asf_guid mediatype_video
Definition: wtv.c:378
static const AVCodecGuid video_guids[]
Definition: wtv.c:413
int size
int64_t pts
Definition: wtv.c:331
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: wtv.c:263
static const ff_asf_guid timestamp_guid
Definition: wtv.c:346
static const ff_asf_guid mediatype_audio
Definition: wtv.c:376
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2074
int64_t epoch
timeline file
Definition: wtv.c:330
static av_always_inline int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riff.h:94
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
Definition: wtv.c:462
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
#define FF_ARG_GUID(g)
Definition: riff.h:82
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:3208
int64_t position
Definition: wtv.c:65
int64_t pos
Definition: avformat.h:644
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
parse VIDEOINFOHEADER2 structure
Definition: wtv.c:578
#define ARG_PRETTY_GUID(g)
Definition: wtv.c:41
int sector_bits
file system (AVFormatContext->pb)
Definition: wtv.c:60
#define LEN_PRETTY_GUID
Definition: wtv.c:43
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:186
unsigned char * buffer
Start of the buffer.
Definition: avio.h:82
enum AVMediaType codec_type
Definition: rtp.c:36
static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
Definition: wtv.c:116
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:665
int error
number of sectors
Definition: wtv.c:64
void * priv_data
Definition: avformat.h:703
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:89
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
Parse metadata entries.
Definition: wtv.c:551
static const ff_asf_guid dir_entry_guid
Definition: wtv.c:252
static const ff_asf_guid stream_guid
Definition: wtv.c:350
#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:1320
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.
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wtv.c:1042
int seen_data
Definition: wtv.c:325
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:402
static const ff_asf_guid mediatype_mpeg2_sections
Definition: wtv.c:382
Format I/O context.
Definition: avformat.h:871
static const ff_asf_guid mediatype_mstvcaption
Definition: wtv.c:386
#define AV_RL64
Definition: intreadwrite.h:173
static const ff_asf_guid stream2_guid
Definition: wtv.c:352
static const ff_asf_guid data_guid
Definition: wtv.c:348
Public dictionary API.
static const ff_asf_guid EVENTID_StreamIDSpanningEvent
Definition: wtv.c:366
static const ff_asf_guid EVENTID_SubtitleSpanningEvent
Definition: wtv.c:354
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 const ff_asf_guid format_waveformatex
Definition: wtv.c:404
#define FF_MEDIASUBTYPE_BASE_GUID
Definition: riff.h:86
static int read_probe(AVProbeData *p)
Definition: wtv.c:418
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent
Definition: wtv.c:364
enum AVStreamParseType need_parsing
Definition: avformat.h:816
int id
Format-specific stream ID.
Definition: avformat.h:690
int64_t length
Definition: wtv.c:66
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1162
const char * name
static const ff_asf_guid mediasubtype_dvb_subtitle
Definition: wtv.c:392
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:935
const char data[16]
Definition: mxf.c:66
static const ff_asf_guid mediasubtype_teletext
Definition: wtv.c:394
static int flags
Definition: log.c:44
#define AVERROR_EOF
End of file.
Definition: error.h:51
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:118
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:219
AVInputFormat ff_wtv_demuxer
Definition: wtv.c:1105
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2481
static float t
Definition: output.c:52
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: wtv.c:77
static const ff_asf_guid EVENTID_TeletextSpanningEvent
Definition: wtv.c:368
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:446
static const uint8_t timeline_table_0_entries_Events_le16[]
Definition: wtv.c:946
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
Definition: wtv.c:496
#define AVINDEX_KEYFRAME
Definition: avformat.h:646
Definition: wtv.c:57
#define SHIFT_SECTOR_BITS(a)
Definition: wtv.c:55
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:107
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
Parse WTV chunks.
Definition: wtv.c:776
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1064
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent
Definition: wtv.c:362
AVIOContext * pb_filesystem
Definition: wtv.c:58
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:558
#define AVERROR(e)
Definition: error.h:43
int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
Definition: riffdec.c:78
int64_t timestamp
Definition: avformat.h:645
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:142
g
Definition: yuv2rgb.c:535
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:369
static int read_close(AVFormatContext *s)
Definition: wtv.c:1097
static const ff_asf_guid mediatype_mpeg2_pes
Definition: wtv.c:384
static void parse_mpeg1waveformatex(AVStream *st)
Parse MPEG1WAVEFORMATEX extradata structure.
Definition: wtv.c:592
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:148
AVStream * avformat_new_stream(AVFormatContext *s, AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2662
#define WTV_PAD8(x)
Definition: wtv.c:324
#define FFMAX(a, b)
Definition: common.h:55
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1840
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:437
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:702
AVIOContext * pb
Definition: wtv.c:329
static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent
Definition: wtv.c:358
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:390
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:923
static const ff_asf_guid metadata_guid
Definition: wtv.c:344
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:3285
int bit_rate
the average bitrate
Definition: avcodec.h:1112
audio channel layout utility functions
static const ff_asf_guid format_mpeg2_video
Definition: wtv.c:408
#define FFMIN(a, b)
Definition: common.h:57
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:29
static const uint8_t table_0_entries_time_le16[]
Definition: wtv.c:944
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: avio.h:210
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
static const ff_asf_guid EVENTID_LanguageSpanningEvent
Definition: wtv.c:356
static char buffer[20]
Definition: seek-test.c:31
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
Definition: wtv.c:370
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:749
Opaque data information usually sparse.
Definition: avutil.h:191
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:110
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:666
uint8_t ff_asf_guid[16]
Definition: riff.h:70
Stream structure.
Definition: avformat.h:683
const AVCodecGuid ff_codec_wav_guids[]
Definition: riffdec.c:32
static const ff_asf_guid format_none
Definition: wtv.c:410
NULL
Definition: eval.c:55
static const ff_asf_guid wtv_guid
Definition: wtv.c:342
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent
Definition: wtv.c:360
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:1262
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
Initialise stream.
Definition: wtv.c:621
enum AVMediaType codec_type
Definition: avcodec.h:1062
enum AVCodecID codec_id
Definition: avcodec.h:1065
AVIOContext * pb
I/O context.
Definition: avformat.h:913
#define AV_RN16(p)
Definition: intreadwrite.h:322
static const ff_asf_guid mediasubtype_mpeg2_sections
Definition: wtv.c:398
int nb_index_entries
Definition: wtv.c:337
int extradata_size
Definition: avcodec.h:1163
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:62
static void wtvfile_close(AVIOContext *pb)
Close file opened with wtvfile_open_sector(), or wtv_open()
Definition: wtv.c:309
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:1519
static const ff_asf_guid mediasubtype_cpfilters_processed
Definition: wtv.c:390
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert win32 FILETIME to ISO-8601 string.
Definition: wtv.c:426
const AVMetadataConv ff_asf_metadata_conv[]
Definition: asf.c:147
static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string.
Definition: wtv.c:439
static const ff_asf_guid mediasubtype_mpeg1payload
Definition: wtv.c:380
int error
contains the error code or 0 if no error happened
Definition: avio.h:102
This structure contains the data a format has to probe a file.
Definition: avformat.h:388
unsigned int index_entries_allocated_size
Definition: wtv.c:338
static const ff_asf_guid format_videoinfo2
Definition: wtv.c:406
static const ff_asf_guid format_cpfilters_processed
Definition: wtv.c:402
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:1250
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:734
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:395
full parsing and repack
Definition: avformat.h:637
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:542
Main libavformat public API header.
enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
Definition: riffdec.c:40
static const uint8_t timeline_le16[]
Definition: wtv.c:940
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
Definition: riffdec.c:141
#define FF_PRI_GUID
Definition: riff.h:79
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:738
static const ff_asf_guid mediasubtype_dtvccdata
Definition: wtv.c:396
#define AVSEEK_SIZE
Passing this as the "whence" parameter to a seek function causes it to return the filesize without se...
Definition: avio.h:190
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
Convert OLE DATE to ISO-8601 string.
Definition: wtv.c:452
int64_t last_valid_pts
pts for next data chunk
Definition: wtv.c:332
uint32_t * sectors
sector shift bits; used to convert sector number into pb_filesystem offset
Definition: wtv.c:61
static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
Open file.
Definition: wtv.c:159
int eof_reached
true if eof reached
Definition: avio.h:96
int len
#define WTV_SECTOR_SIZE
Definition: wtv.c:52
#define wtvfile_open(s, buf, buf_size, filename)
Definition: wtv.c:303
int channels
number of audio channels
Definition: avcodec.h:1780
void * priv_data
Format private data.
Definition: avformat.h:899
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:1521
#define _
Definition: wtv.c:939
static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, ff_asf_guid mediatype, ff_asf_guid subtype, ff_asf_guid formattype, int size)
parse Media Type structure and populate stream
Definition: wtv.c:653
int ff_get_bmp_header(AVIOContext *pb, AVStream *st)
Read BITMAPINFOHEADER structure and set AVStream codec width, height and bits_per_encoded_sample fiel...
Definition: riffdec.c:158
static int read_ints(AVIOContext *pb, uint32_t *data, int count)
read non-zero integers (le32) from input stream
Definition: wtv.c:142
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:516
int stream_index
Definition: avcodec.h:975
int nb_sectors
file allocation table
Definition: wtv.c:62
#define AV_CH_LAYOUT_MONO
static int read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: wtv.c:1061
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:89
#define WTV_SECTOR_BITS
Definition: wtv.c:51
This structure stores compressed data.
Definition: avcodec.h:950
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:566
static const uint8_t table_0_entries_legacy_attrib_le16[]
Definition: wtv.c:942
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:205
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:966
static int read_header(AVFormatContext *s)
Definition: wtv.c:950
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:228
AVIndexEntry * index_entries
latest valid pts, used for interative seeking
Definition: wtv.c:336