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 
28 #include <inttypes.h>
29 
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/intfloat.h"
33 #include "libavutil/dict.h"
34 #include "avformat.h"
35 #include "internal.h"
36 #include "riff.h"
37 #include "asf.h"
38 #include "mpegts.h"
39 
40 /* Macros for formating GUIDs */
41 #define PRI_PRETTY_GUID \
42  "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"
43 #define ARG_PRETTY_GUID(g) \
44  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]
45 #define LEN_PRETTY_GUID 34
46 
47 /*
48  *
49  * File system routines
50  *
51  */
52 
53 #define WTV_SECTOR_BITS 12
54 #define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS)
55 #define WTV_BIGSECTOR_BITS 18
56 
57 #define SHIFT_SECTOR_BITS(a) ((int64_t)(a) << WTV_SECTOR_BITS)
58 
59 typedef struct {
63  uint32_t *sectors;
64  int nb_sectors;
66  int error;
67  int64_t position;
68  int64_t length;
69 } WtvFile;
70 
71 static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
72 {
73  return avio_seek(pb, SHIFT_SECTOR_BITS(sector) + offset, SEEK_SET);
74 }
75 
79 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
80 {
81  WtvFile *wf = opaque;
82  AVIOContext *pb = wf->pb_filesystem;
83  int nread = 0;
84 
85  if (wf->error || pb->error)
86  return -1;
87  if (wf->position >= wf->length || pb->eof_reached)
88  return 0;
89 
90  buf_size = FFMIN(buf_size, wf->length - wf->position);
91  while(nread < buf_size) {
92  int n;
93  int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
94  int read_request = FFMIN(buf_size - nread, remaining_in_sector);
95 
96  n = avio_read(pb, buf, read_request);
97  if (n <= 0)
98  break;
99  nread += n;
100  buf += n;
101  wf->position += n;
102  if (n == remaining_in_sector) {
103  int i = wf->position >> wf->sector_bits;
104  if (i >= wf->nb_sectors ||
105  (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
106  seek_by_sector(pb, wf->sectors[i], 0) < 0)) {
107  wf->error = 1;
108  break;
109  }
110  }
111  }
112  return nread;
113 }
114 
118 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
119 {
120  WtvFile *wf = opaque;
121  AVIOContext *pb = wf->pb_filesystem;
122 
123  if (whence == AVSEEK_SIZE)
124  return wf->length;
125  else if (whence == SEEK_CUR)
126  offset = wf->position + offset;
127  else if (whence == SEEK_END)
128  offset = wf->length;
129 
130  wf->error = offset < 0 || offset >= wf->length ||
131  seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits],
132  offset & ((1 << wf->sector_bits) - 1)) < 0;
133  wf->position = offset;
134  return offset;
135 }
136 
144 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
145 {
146  int i, total = 0;
147  for (i = 0; i < count; i++) {
148  if ((data[total] = avio_rl32(pb)))
149  total++;
150  }
151  return total;
152 }
153 
161 static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
162 {
163  AVIOContext *pb;
164  WtvFile *wf;
165  uint8_t *buffer;
166 
167  if (seek_by_sector(s->pb, first_sector, 0) < 0)
168  return NULL;
169 
170  wf = av_mallocz(sizeof(WtvFile));
171  if (!wf)
172  return NULL;
173 
174  if (depth == 0) {
175  wf->sectors = av_malloc(sizeof(uint32_t));
176  if (!wf->sectors) {
177  av_free(wf);
178  return NULL;
179  }
180  wf->sectors[0] = first_sector;
181  wf->nb_sectors = 1;
183  } else if (depth == 1) {
185  if (!wf->sectors) {
186  av_free(wf);
187  return NULL;
188  }
189  wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
190  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
191  } else if (depth == 2) {
192  uint32_t sectors1[WTV_SECTOR_SIZE / 4];
193  int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
194  int i;
195 
196  wf->sectors = av_malloc(SHIFT_SECTOR_BITS(nb_sectors1));
197  if (!wf->sectors) {
198  av_free(wf);
199  return NULL;
200  }
201  wf->nb_sectors = 0;
202  for (i = 0; i < nb_sectors1; i++) {
203  if (seek_by_sector(s->pb, sectors1[i], 0) < 0)
204  break;
205  wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
206  }
207  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
208  } else {
209  av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
210  av_free(wf);
211  return NULL;
212  }
213 
214  if (!wf->nb_sectors) {
215  av_free(wf->sectors);
216  av_free(wf);
217  return NULL;
218  }
219 
220  /* check length */
221  length &= 0xFFFFFFFFFFFF;
222  if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
223  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);
224  length = (int64_t)wf->nb_sectors << wf->sector_bits;
225  }
226  wf->length = length;
227 
228  /* seek to initial sector */
229  wf->position = 0;
230  if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) {
231  av_free(wf->sectors);
232  av_free(wf);
233  return NULL;
234  }
235 
236  wf->pb_filesystem = s->pb;
237  buffer = av_malloc(1 << wf->sector_bits);
238  if (!buffer) {
239  av_free(wf->sectors);
240  av_free(wf);
241  return NULL;
242  }
243 
244  pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
246  if (!pb) {
247  av_free(buffer);
248  av_free(wf->sectors);
249  av_free(wf);
250  }
251  return pb;
252 }
253 
255  {0x92,0xB7,0x74,0x91,0x59,0x70,0x70,0x44,0x88,0xDF,0x06,0x3B,0x82,0xCC,0x21,0x3D};
256 
265 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
266 {
267  const uint8_t *buf_end = buf + buf_size;
268 
269  while(buf + 48 <= buf_end) {
270  int dir_length, name_size, first_sector, depth;
271  uint64_t file_length;
272  const uint8_t *name;
273  if (ff_guidcmp(buf, dir_entry_guid)) {
274  av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; "
275  "remaining directory entries ignored\n", FF_ARG_GUID(buf));
276  break;
277  }
278  dir_length = AV_RL16(buf + 16);
279  file_length = AV_RL64(buf + 24);
280  name_size = 2 * AV_RL32(buf + 32);
281  if (name_size < 0) {
282  av_log(s, AV_LOG_ERROR,
283  "bad filename length, remaining directory entries ignored\n");
284  break;
285  }
286  if (48 + name_size > buf_end - buf) {
287  av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
288  break;
289  }
290  first_sector = AV_RL32(buf + 40 + name_size);
291  depth = AV_RL32(buf + 44 + name_size);
292 
293  /* compare file name; test optional null terminator */
294  name = buf + 40;
295  if (name_size >= filename_size &&
296  !memcmp(name, filename, filename_size) &&
297  (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
298  return wtvfile_open_sector(first_sector, file_length, depth, s);
299 
300  buf += dir_length;
301  }
302  return 0;
303 }
304 
305 #define wtvfile_open(s, buf, buf_size, filename) \
306  wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
307 
311 static void wtvfile_close(AVIOContext *pb)
312 {
313  WtvFile *wf = pb->opaque;
314  av_free(wf->sectors);
315  av_free(wf);
316  av_free(pb->buffer);
317  av_free(pb);
318 }
319 
320 /*
321  *
322  * Main demuxer
323  *
324  */
325 
326 typedef struct {
328 } WtvStream;
329 
330 typedef struct {
332  int64_t epoch;
333  int64_t pts;
334  int64_t last_valid_pts;
336  /* maintain private seek index, as the AVIndexEntry->pos is relative to the
337  start of the 'timeline' file, not the file system (AVFormatContext->pb) */
341 } WtvContext;
342 
343 /* WTV GUIDs */
344 static const ff_asf_guid wtv_guid =
345  {0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
347  {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
349  {0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
350 static const ff_asf_guid data_guid =
351  {0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
352 static const ff_asf_guid stream_guid =
353  {0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
354 static const ff_asf_guid stream2_guid =
355  {0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
357  {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
359  {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
361  {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
363  {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
365  {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
367  {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
369  {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
371  {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
373  {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
374 
375 /* Windows media GUIDs */
376 
377 /* Media types */
379  {'a','u','d','s',FF_MEDIASUBTYPE_BASE_GUID};
381  {'v','i','d','s',FF_MEDIASUBTYPE_BASE_GUID};
383  {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
385  {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
387  {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
389  {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
390 
391 /* Media subtypes */
393  {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
395  {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
397  {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
399  {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
401  {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
402 
403 /* Formats */
405  {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
407  {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
409  {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
411  {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
412 static const ff_asf_guid format_none =
413  {0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
414 
415 static const AVCodecGuid video_guids[] = {
416  {AV_CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
418 };
419 
420 static int read_probe(AVProbeData *p)
421 {
422  return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
423 }
424 
428 static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
429 {
430  time_t t = (value / 10000000LL) - 11644473600LL;
431  struct tm *tm = gmtime(&t);
432  if (tm)
433  strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
434  else
435  buf[0] = '\0';
436 }
437 
441 static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
442 {
443  time_t t = (value / 10000000LL) - 719162LL*86400LL;
444  struct tm *tm = gmtime(&t);
445  if (tm)
446  strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
447  else
448  buf[0] = '\0';
449 }
450 
454 static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
455 {
456  time_t t = 631112400LL + 86400*av_int2double(value);
457  struct tm *tm = gmtime(&t);
458  if (tm)
459  strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
460  else
461  buf[0] = '\0';
462 }
463 
464 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
465 {
466  char mime[1024];
467  char description[1024];
468  unsigned int filesize;
469  AVStream *st;
470  int64_t pos = avio_tell(pb);
471 
472  avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
473  if (strcmp(mime, "image/jpeg"))
474  goto done;
475 
476  avio_r8(pb);
477  avio_get_str16le(pb, INT_MAX, description, sizeof(description));
478  filesize = avio_rl32(pb);
479  if (!filesize)
480  goto done;
481 
482  st = avformat_new_stream(s, NULL);
483  if (!st)
484  goto done;
485  av_dict_set(&st->metadata, "title", description, 0);
488  st->codec->extradata = av_mallocz(filesize);
489  st->id = -1;
490  if (!st->codec->extradata)
491  goto done;
492  st->codec->extradata_size = filesize;
493  avio_read(pb, st->codec->extradata, filesize);
494 done:
495  avio_seek(pb, pos + length, SEEK_SET);
496 }
497 
498 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
499 {
500  int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
501  char *buf = av_malloc(buf_size);
502  if (!buf)
503  return;
504 
505  if (type == 0 && length == 4) {
506  snprintf(buf, buf_size, "%u", avio_rl32(pb));
507  } else if (type == 1) {
508  avio_get_str16le(pb, length, buf, buf_size);
509  if (!strlen(buf)) {
510  av_free(buf);
511  return;
512  }
513  } else if (type == 3 && length == 4) {
514  strcpy(buf, avio_rl32(pb) ? "true" : "false");
515  } else if (type == 4 && length == 8) {
516  int64_t num = avio_rl64(pb);
517  if (!strcmp(key, "WM/EncodingTime") ||
518  !strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
519  filetime_to_iso8601(buf, buf_size, num);
520  else if (!strcmp(key, "WM/WMRVEncodeTime") ||
521  !strcmp(key, "WM/WMRVEndTime"))
522  crazytime_to_iso8601(buf, buf_size, num);
523  else if (!strcmp(key, "WM/WMRVExpirationDate"))
524  oledate_to_iso8601(buf, buf_size, num);
525  else if (!strcmp(key, "WM/WMRVBitrate"))
526  snprintf(buf, buf_size, "%f", av_int2double(num));
527  else
528  snprintf(buf, buf_size, "%"PRIi64, num);
529  } else if (type == 5 && length == 2) {
530  snprintf(buf, buf_size, "%u", avio_rl16(pb));
531  } else if (type == 6 && length == 16) {
532  ff_asf_guid guid;
533  avio_read(pb, guid, 16);
534  snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
535  } else if (type == 2 && !strcmp(key, "WM/Picture")) {
536  get_attachment(s, pb, length);
537  av_freep(&buf);
538  return;
539  } else {
540  av_freep(&buf);
541  av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
542  avio_skip(pb, length);
543  return;
544  }
545 
546  av_dict_set(&s->metadata, key, buf, 0);
547  av_freep(&buf);
548 }
549 
554 {
555  ff_asf_guid guid;
556  int length, type;
557  while(!pb->eof_reached) {
558  char key[1024];
559  ff_get_guid(pb, &guid);
560  type = avio_rl32(pb);
561  length = avio_rl32(pb);
562  if (!length)
563  break;
564  if (ff_guidcmp(&guid, metadata_guid)) {
565  av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
566  "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
567  break;
568  }
569  avio_get_str16le(pb, INT_MAX, key, sizeof(key));
570  get_tag(s, pb, key, type, length);
571  }
572 
574 }
575 
581 {
582  WtvContext *wtv = s->priv_data;
583  AVIOContext *pb = wtv->pb;
584 
585  avio_skip(pb, 72); // picture aspect ratio is unreliable
586  ff_get_bmp_header(pb, st);
587 
588  return 72 + 40;
589 }
590 
595 {
596  /* fwHeadLayer */
597  switch (AV_RL16(st->codec->extradata)) {
598  case 0x0001 : st->codec->codec_id = AV_CODEC_ID_MP1; break;
599  case 0x0002 : st->codec->codec_id = AV_CODEC_ID_MP2; break;
600  case 0x0004 : st->codec->codec_id = AV_CODEC_ID_MP3; break;
601  }
602 
603  st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
604 
605  /* dwHeadMode */
606  switch (AV_RL16(st->codec->extradata + 6)) {
607  case 1 :
608  case 2 :
609  case 4 : st->codec->channels = 2;
611  break;
612  case 8 : st->codec->channels = 1;
614  break;
615  }
616 }
617 
623 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
624 {
625  if (st) {
626  if (st->codec->extradata) {
627  av_freep(&st->codec->extradata);
628  st->codec->extradata_size = 0;
629  }
630  } else {
631  WtvStream *wst = av_mallocz(sizeof(WtvStream));
632  if (!wst)
633  return NULL;
634  st = avformat_new_stream(s, NULL);
635  if (!st)
636  return NULL;
637  st->id = sid;
638  st->priv_data = wst;
639  }
640  st->codec->codec_type = codec_type;
642  avpriv_set_pts_info(st, 64, 1, 10000000);
643  return st;
644 }
645 
656  ff_asf_guid mediatype, ff_asf_guid subtype,
657  ff_asf_guid formattype, int size)
658 {
659  WtvContext *wtv = s->priv_data;
660  AVIOContext *pb = wtv->pb;
662  !ff_guidcmp(formattype, format_cpfilters_processed)) {
663  ff_asf_guid actual_subtype;
664  ff_asf_guid actual_formattype;
665 
666  if (size < 32) {
667  av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
668  avio_skip(pb, size);
669  return NULL;
670  }
671 
672  avio_skip(pb, size - 32);
673  ff_get_guid(pb, &actual_subtype);
674  ff_get_guid(pb, &actual_formattype);
675  avio_seek(pb, -size, SEEK_CUR);
676 
677  st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
678  avio_skip(pb, 32);
679  return st;
680  } else if (!ff_guidcmp(mediatype, mediatype_audio)) {
681  st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
682  if (!st)
683  return NULL;
684  if (!ff_guidcmp(formattype, format_waveformatex)) {
685  int ret = ff_get_wav_header(pb, st->codec, size);
686  if (ret < 0)
687  return NULL;
688  } else {
689  if (ff_guidcmp(formattype, format_none))
690  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
691  avio_skip(pb, size);
692  }
693 
694  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
696  } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
697  if (st->codec->extradata && st->codec->extradata_size >= 22)
699  else
700  av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
701  } else {
703  if (st->codec->codec_id == AV_CODEC_ID_NONE)
704  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
705  }
706  return st;
707  } else if (!ff_guidcmp(mediatype, mediatype_video)) {
708  st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
709  if (!st)
710  return NULL;
711  if (!ff_guidcmp(formattype, format_videoinfo2)) {
712  int consumed = parse_videoinfoheader2(s, st);
713  avio_skip(pb, FFMAX(size - consumed, 0));
714  } else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
715  int consumed = parse_videoinfoheader2(s, st);
716  avio_skip(pb, FFMAX(size - consumed, 0));
717  } else {
718  if (ff_guidcmp(formattype, format_none))
719  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
720  avio_skip(pb, size);
721  }
722 
723  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
725  } else {
726  st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype);
727  }
728  if (st->codec->codec_id == AV_CODEC_ID_NONE)
729  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
730  return st;
731  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
733  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
734  if (!st)
735  return NULL;
736  if (ff_guidcmp(formattype, format_none))
737  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
738  avio_skip(pb, size);
740  return st;
741  } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
743  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
744  if (!st)
745  return NULL;
746  if (ff_guidcmp(formattype, format_none))
747  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
748  avio_skip(pb, size);
750  return st;
751  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
753  if (ff_guidcmp(formattype, format_none))
754  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
755  avio_skip(pb, size);
756  return NULL;
757  }
758 
759  av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
760  ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
761  FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
762  avio_skip(pb, size);
763  return NULL;
764 }
765 
766 enum {
769 };
770 
778 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
779 {
780  WtvContext *wtv = s->priv_data;
781  AVIOContext *pb = wtv->pb;
782  while (!pb->eof_reached) {
783  ff_asf_guid g;
784  int len, sid, consumed;
785 
786  ff_get_guid(pb, &g);
787  len = avio_rl32(pb);
788  if (len < 32)
789  break;
790  sid = avio_rl32(pb) & 0x7FFF;
791  avio_skip(pb, 8);
792  consumed = 32;
793 
794  if (!ff_guidcmp(g, stream_guid)) {
795  if (ff_find_stream_index(s, sid) < 0) {
796  ff_asf_guid mediatype, subtype, formattype;
797  int size;
798  avio_skip(pb, 28);
799  ff_get_guid(pb, &mediatype);
800  ff_get_guid(pb, &subtype);
801  avio_skip(pb, 12);
802  ff_get_guid(pb, &formattype);
803  size = avio_rl32(pb);
804  parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
805  consumed += 92 + size;
806  }
807  } else if (!ff_guidcmp(g, stream2_guid)) {
808  int stream_index = ff_find_stream_index(s, sid);
809  if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
810  ff_asf_guid mediatype, subtype, formattype;
811  int size;
812  avio_skip(pb, 12);
813  ff_get_guid(pb, &mediatype);
814  ff_get_guid(pb, &subtype);
815  avio_skip(pb, 12);
816  ff_get_guid(pb, &formattype);
817  size = avio_rl32(pb);
818  parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
819  consumed += 76 + size;
820  }
827  int stream_index = ff_find_stream_index(s, sid);
828  if (stream_index >= 0) {
829  AVStream *st = s->streams[stream_index];
830  uint8_t buf[258];
831  const uint8_t *pbuf = buf;
832  int buf_size;
833 
834  avio_skip(pb, 8);
835  consumed += 8;
838  avio_skip(pb, 6);
839  consumed += 6;
840  }
841 
842  buf_size = FFMIN(len - consumed, sizeof(buf));
843  avio_read(pb, buf, buf_size);
844  consumed += buf_size;
845  ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
846  }
847  } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
848  int stream_index = ff_find_stream_index(s, sid);
849  if (stream_index >= 0) {
850  AVStream *st = s->streams[stream_index];
851  int audio_type;
852  avio_skip(pb, 8);
853  audio_type = avio_r8(pb);
854  if (audio_type == 2)
856  else if (audio_type == 3)
858  consumed += 9;
859  }
861  int stream_index = ff_find_stream_index(s, sid);
862  if (stream_index >= 0) {
863  avio_skip(pb, 12);
864  if (avio_rl32(pb))
865  av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
866  consumed += 16;
867  }
868  } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
869  int stream_index = ff_find_stream_index(s, sid);
870  if (stream_index >= 0) {
871  AVStream *st = s->streams[stream_index];
872  uint8_t language[4];
873  avio_skip(pb, 12);
874  avio_read(pb, language, 3);
875  if (language[0]) {
876  language[3] = 0;
877  av_dict_set(&st->metadata, "language", language, 0);
878  if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
880  }
881  consumed += 15;
882  }
883  } else if (!ff_guidcmp(g, timestamp_guid)) {
884  int stream_index = ff_find_stream_index(s, sid);
885  if (stream_index >= 0) {
886  avio_skip(pb, 8);
887  wtv->pts = avio_rl64(pb);
888  consumed += 16;
889  if (wtv->pts == -1)
890  wtv->pts = AV_NOPTS_VALUE;
891  else {
892  wtv->last_valid_pts = wtv->pts;
893  if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
894  wtv->epoch = wtv->pts;
895  if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
896 #define WTV_PAD8(x) (((x) + 7) & ~7)
897  avio_skip(pb, WTV_PAD8(len) - consumed);
898  return 0;
899  }
900  }
901  }
902  } else if (!ff_guidcmp(g, data_guid)) {
903  int stream_index = ff_find_stream_index(s, sid);
904  if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) {
905  WtvStream *wst = s->streams[stream_index]->priv_data;
906  wst->seen_data = 1;
907  if (len_ptr) {
908  *len_ptr = len;
909  }
910  return stream_index;
911  }
912  } else if (
913  !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}) ||
914  !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}) ||
915  !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}) ||
916  !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}) ||
917  !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}) ||
918  !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}) ||
919  !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}) ||
920  !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}) ||
921  !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}) ||
922  !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}) ||
923  !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
924  !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
925  !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
926  !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
927  !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
928  !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
929  !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
930  !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
931  //ignore known guids
932  } else
933  av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
934 
935  avio_skip(pb, WTV_PAD8(len) - consumed);
936  }
937  return AVERROR_EOF;
938 }
939 
940 /* declare utf16le strings */
941 #define _ , 0,
942 static const uint8_t timeline_le16[] =
943  {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
945  {'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};
947  {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
949  {'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};
950 #undef _
951 
953 {
954  WtvContext *wtv = s->priv_data;
955  int root_sector, root_size;
956  uint8_t root[WTV_SECTOR_SIZE];
957  AVIOContext *pb;
958  int64_t timeline_pos;
959  int ret;
960 
961  wtv->epoch =
962  wtv->pts =
964 
965  /* read root directory sector */
966  avio_skip(s->pb, 0x30);
967  root_size = avio_rl32(s->pb);
968  if (root_size > sizeof(root)) {
969  av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
970  return AVERROR_INVALIDDATA;
971  }
972  avio_skip(s->pb, 4);
973  root_sector = avio_rl32(s->pb);
974 
975  seek_by_sector(s->pb, root_sector, 0);
976  root_size = avio_read(s->pb, root, root_size);
977  if (root_size < 0)
978  return AVERROR_INVALIDDATA;
979 
980  /* parse chunks up until first data chunk */
981  wtv->pb = wtvfile_open(s, root, root_size, timeline_le16);
982  if (!wtv->pb) {
983  av_log(s, AV_LOG_ERROR, "timeline data missing\n");
984  return AVERROR_INVALIDDATA;
985  }
986 
987  ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
988  if (ret < 0)
989  return ret;
990  avio_seek(wtv->pb, -32, SEEK_CUR);
991 
992  timeline_pos = avio_tell(s->pb); // save before opening another file
993 
994  /* read metadata */
995  pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16);
996  if (pb) {
997  parse_legacy_attrib(s, pb);
998  wtvfile_close(pb);
999  }
1000 
1001  /* read seek index */
1002  if (s->nb_streams) {
1003  AVStream *st = s->streams[0];
1004  pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16);
1005  if (pb) {
1006  while(1) {
1007  uint64_t timestamp = avio_rl64(pb);
1008  uint64_t frame_nb = avio_rl64(pb);
1009  if (pb->eof_reached)
1010  break;
1012  0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1013  }
1014  wtvfile_close(pb);
1015 
1016  if (wtv->nb_index_entries) {
1017  pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16);
1018  if (pb) {
1019  int i;
1020  while (1) {
1021  uint64_t frame_nb = avio_rl64(pb);
1022  uint64_t position = avio_rl64(pb);
1023  if (pb->eof_reached)
1024  break;
1025  for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
1026  AVIndexEntry *e = wtv->index_entries + i;
1027  if (frame_nb > e->size)
1028  break;
1029  if (position > e->pos)
1030  e->pos = position;
1031  }
1032  }
1033  wtvfile_close(pb);
1034  st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
1035  }
1036  }
1037  }
1038  }
1039 
1040  avio_seek(s->pb, timeline_pos, SEEK_SET);
1041  return 0;
1042 }
1043 
1045 {
1046  WtvContext *wtv = s->priv_data;
1047  AVIOContext *pb = wtv->pb;
1048  int stream_index, len, ret;
1049 
1050  stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1051  if (stream_index < 0)
1052  return stream_index;
1053 
1054  ret = av_get_packet(pb, pkt, len - 32);
1055  if (ret < 0)
1056  return ret;
1057  pkt->stream_index = stream_index;
1058  pkt->pts = wtv->pts;
1059  avio_skip(pb, WTV_PAD8(len) - len);
1060  return 0;
1061 }
1062 
1063 static int read_seek(AVFormatContext *s, int stream_index,
1064  int64_t ts, int flags)
1065 {
1066  WtvContext *wtv = s->priv_data;
1067  AVIOContext *pb = wtv->pb;
1068  AVStream *st = s->streams[0];
1069  int64_t ts_relative;
1070  int i;
1071 
1072  if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1073  return AVERROR(ENOSYS);
1074 
1075  /* timestamp adjustment is required because wtv->pts values are absolute,
1076  * whereas AVIndexEntry->timestamp values are relative to epoch. */
1077  ts_relative = ts;
1078  if (wtv->epoch != AV_NOPTS_VALUE)
1079  ts_relative -= wtv->epoch;
1080 
1081  i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1082  if (i < 0) {
1083  if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
1084  avio_seek(pb, 0, SEEK_SET);
1085  else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
1086  avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
1087  if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1088  return AVERROR(ERANGE);
1089  return 0;
1090  }
1091  wtv->pts = wtv->index_entries[i].timestamp;
1092  if (wtv->epoch != AV_NOPTS_VALUE)
1093  wtv->pts += wtv->epoch;
1094  wtv->last_valid_pts = wtv->pts;
1095  avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
1096  return 0;
1097 }
1098 
1100 {
1101  WtvContext *wtv = s->priv_data;
1102  av_free(wtv->index_entries);
1103  wtvfile_close(wtv->pb);
1104  return 0;
1105 }
1106 
1108  .name = "wtv",
1109  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1110  .priv_data_size = sizeof(WtvContext),
1114  .read_seek = read_seek,
1116  .flags = AVFMT_SHOW_IDS,
1117 };
#define PRI_PRETTY_GUID
Definition: wtv.c:41
#define WTV_BIGSECTOR_BITS
Definition: wtv.c:55
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:71
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:380
static const AVCodecGuid video_guids[]
Definition: wtv.c:415
int size
int64_t pts
Definition: wtv.c:333
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:265
static const ff_asf_guid timestamp_guid
Definition: wtv.c:348
static const ff_asf_guid mediatype_audio
Definition: wtv.c:378
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:1943
int64_t epoch
timeline file
Definition: wtv.c:332
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:464
#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:2829
int64_t position
Definition: wtv.c:67
int64_t pos
Definition: avformat.h:660
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
parse VIDEOINFOHEADER2 structure
Definition: wtv.c:580
#define ARG_PRETTY_GUID(g)
Definition: wtv.c:43
int sector_bits
file system (AVFormatContext->pb)
Definition: wtv.c:62
#define LEN_PRETTY_GUID
Definition: wtv.c:45
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:118
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:681
int error
number of sectors
Definition: wtv.c:66
void * priv_data
Definition: avformat.h:719
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:553
static const ff_asf_guid dir_entry_guid
Definition: wtv.c:254
static const ff_asf_guid stream_guid
Definition: wtv.c:352
#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:1189
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:1044
int seen_data
Definition: wtv.c:327
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:411
static const ff_asf_guid mediatype_mpeg2_sections
Definition: wtv.c:384
Format I/O context.
Definition: avformat.h:922
static const ff_asf_guid mediatype_mstvcaption
Definition: wtv.c:388
#define AV_RL64
Definition: intreadwrite.h:173
static const ff_asf_guid stream2_guid
Definition: wtv.c:354
static const ff_asf_guid data_guid
Definition: wtv.c:350
Public dictionary API.
static const ff_asf_guid EVENTID_StreamIDSpanningEvent
Definition: wtv.c:368
static const ff_asf_guid EVENTID_SubtitleSpanningEvent
Definition: wtv.c:356
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:406
#define FF_MEDIASUBTYPE_BASE_GUID
Definition: riff.h:86
static int read_probe(AVProbeData *p)
Definition: wtv.c:420
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent
Definition: wtv.c:366
enum AVStreamParseType need_parsing
Definition: avformat.h:867
int id
Format-specific stream ID.
Definition: avformat.h:706
int64_t length
Definition: wtv.c:68
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
const char * name
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2521
static const ff_asf_guid mediasubtype_dvb_subtitle
Definition: wtv.c:394
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:990
const char data[16]
Definition: mxf.c:70
static const ff_asf_guid mediasubtype_teletext
Definition: wtv.c:396
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:117
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:1107
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2523
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: wtv.c:79
static const ff_asf_guid EVENTID_TeletextSpanningEvent
Definition: wtv.c:370
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:452
static const uint8_t timeline_table_0_entries_Events_le16[]
Definition: wtv.c:948
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
Definition: wtv.c:498
#define AVINDEX_KEYFRAME
Definition: avformat.h:662
Definition: wtv.c:59
#define SHIFT_SECTOR_BITS(a)
Definition: wtv.c:57
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:778
#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:1130
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:364
AVIOContext * pb_filesystem
Definition: wtv.c:60
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:564
#define AVERROR(e)
Definition: error.h:43
int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
Definition: riffdec.c:82
int64_t timestamp
Definition: avformat.h:661
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
g
Definition: yuv2rgb.c:535
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:379
static int read_close(AVFormatContext *s)
Definition: wtv.c:1099
static const ff_asf_guid mediatype_mpeg2_pes
Definition: wtv.c:386
static void parse_mpeg1waveformatex(AVStream *st)
Parse MPEG1WAVEFORMATEX extradata structure.
Definition: wtv.c:594
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
#define WTV_PAD8(x)
Definition: wtv.c:326
#define FFMAX(a, b)
Definition: common.h:55
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1868
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:443
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
AVIOContext * pb
Definition: wtv.c:331
static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent
Definition: wtv.c:360
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:397
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:978
static const ff_asf_guid metadata_guid
Definition: wtv.c:346
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:2906
int bit_rate
the average bitrate
Definition: avcodec.h:1114
audio channel layout utility functions
static const ff_asf_guid format_mpeg2_video
Definition: wtv.c:410
#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:946
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:358
static char buffer[20]
Definition: seek-test.c:31
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
Definition: wtv.c:372
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:771
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:682
uint8_t ff_asf_guid[16]
Definition: riff.h:70
Stream structure.
Definition: avformat.h:699
const AVCodecGuid ff_codec_wav_guids[]
Definition: riffdec.c:32
static const ff_asf_guid format_none
Definition: wtv.c:412
NULL
Definition: eval.c:55
static const ff_asf_guid wtv_guid
Definition: wtv.c:344
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent
Definition: wtv.c:362
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:1131
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
Initialise stream.
Definition: wtv.c:623
enum AVMediaType codec_type
Definition: avcodec.h:1058
enum AVCodecID codec_id
Definition: avcodec.h:1067
AVIOContext * pb
I/O context.
Definition: avformat.h:964
#define AV_RN16(p)
Definition: intreadwrite.h:322
static const ff_asf_guid mediasubtype_mpeg2_sections
Definition: wtv.c:400
int nb_index_entries
Definition: wtv.c:339
int extradata_size
Definition: avcodec.h:1165
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:68
static void wtvfile_close(AVIOContext *pb)
Close file opened with wtvfile_open_sector(), or wtv_open()
Definition: wtv.c:311
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:1610
static const ff_asf_guid mediasubtype_cpfilters_processed
Definition: wtv.c:392
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert win32 FILETIME to ISO-8601 string.
Definition: wtv.c:428
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:441
static const ff_asf_guid mediasubtype_mpeg1payload
Definition: wtv.c:382
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:395
unsigned int index_entries_allocated_size
Definition: wtv.c:340
static const ff_asf_guid format_videoinfo2
Definition: wtv.c:408
static const ff_asf_guid format_cpfilters_processed
Definition: wtv.c:404
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:1306
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:756
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:404
full parsing and repack
Definition: avformat.h:653
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:548
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:942
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
Definition: riffdec.c:145
#define FF_PRI_GUID
Definition: riff.h:79
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:760
static const ff_asf_guid mediasubtype_dtvccdata
Definition: wtv.c:398
#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:454
int64_t last_valid_pts
pts for next data chunk
Definition: wtv.c:334
uint32_t * sectors
sector shift bits; used to convert sector number into pb_filesystem offset
Definition: wtv.c:63
static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
Open file.
Definition: wtv.c:161
int eof_reached
true if eof reached
Definition: avio.h:96
int len
#define WTV_SECTOR_SIZE
Definition: wtv.c:54
#define wtvfile_open(s, buf, buf_size, filename)
Definition: wtv.c:305
int channels
number of audio channels
Definition: avcodec.h:1808
void * priv_data
Format private data.
Definition: avformat.h:950
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:1612
#define _
Definition: wtv.c:941
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:655
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:162
static int read_ints(AVIOContext *pb, uint32_t *data, int count)
read non-zero integers (le32) from input stream
Definition: wtv.c:144
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:525
int stream_index
Definition: avcodec.h:975
int nb_sectors
file allocation table
Definition: wtv.c:64
#define AV_CH_LAYOUT_MONO
static int read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: wtv.c:1063
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:89
#define WTV_SECTOR_BITS
Definition: wtv.c:53
This structure stores compressed data.
Definition: avcodec.h:950
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:572
static const uint8_t table_0_entries_legacy_attrib_le16[]
Definition: wtv.c:944
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:952
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:228
AVIndexEntry * index_entries
latest valid pts, used for interative seeking
Definition: wtv.c:338