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_GUID \
40  "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
41 #define ARG_GUID(g) \
42  g[0],g[1],g[2],g[3],g[4],g[5],g[6],g[7],g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15]
43 
44 #define PRI_PRETTY_GUID \
45  "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"
46 #define ARG_PRETTY_GUID(g) \
47  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]
48 #define LEN_PRETTY_GUID 34
49 
50 /*
51  *
52  * File system routines
53  *
54  */
55 
56 #define WTV_SECTOR_BITS 12
57 #define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS)
58 #define WTV_BIGSECTOR_BITS 18
59 
60 typedef struct {
64  uint32_t *sectors;
65  int nb_sectors;
67  int error;
68  int64_t position;
69  int64_t length;
70 } WtvFile;
71 
75 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
76 {
77  WtvFile *wf = opaque;
78  AVIOContext *pb = wf->pb_filesystem;
79  int nread = 0;
80 
81  if (wf->error || pb->error)
82  return -1;
83  if (wf->position >= wf->length || pb->eof_reached)
84  return 0;
85 
86  buf_size = FFMIN(buf_size, wf->length - wf->position);
87  while(nread < buf_size) {
88  int n;
89  int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
90  int read_request = FFMIN(buf_size - nread, remaining_in_sector);
91 
92  n = avio_read(pb, buf, read_request);
93  if (n <= 0)
94  break;
95  nread += n;
96  buf += n;
97  wf->position += n;
98  if (n == remaining_in_sector) {
99  int i = wf->position >> wf->sector_bits;
100  if (i >= wf->nb_sectors ||
101  (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
102  avio_seek(pb, (int64_t)wf->sectors[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)) {
103  wf->error = 1;
104  break;
105  }
106  }
107  }
108  return nread;
109 }
110 
114 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
115 {
116  WtvFile *wf = opaque;
117  AVIOContext *pb = wf->pb_filesystem;
118 
119  if (whence == AVSEEK_SIZE)
120  return wf->length;
121  else if (whence == SEEK_CUR)
122  offset = wf->position + offset;
123  else if (whence == SEEK_END)
124  offset = wf->length;
125 
126  wf->error = offset < 0 || offset >= wf->length ||
127  avio_seek(pb, ((int64_t)wf->sectors[offset >> wf->sector_bits] << WTV_SECTOR_BITS)
128  + (offset & ((1 << wf->sector_bits) - 1)), SEEK_SET) < 0;
129  wf->position = offset;
130  return offset;
131 }
132 
140 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
141 {
142  int i, total = 0;
143  for (i = 0; i < count; i++) {
144  if ((data[total] = avio_rl32(pb)))
145  total++;
146  }
147  return total;
148 }
149 
157 static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
158 {
159  AVIOContext *pb;
160  WtvFile *wf;
161  uint8_t *buffer;
162 
163  if (avio_seek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0)
164  return NULL;
165 
166  wf = av_mallocz(sizeof(WtvFile));
167  if (!wf)
168  return NULL;
169 
170  if (depth == 0) {
171  wf->sectors = av_malloc(sizeof(uint32_t));
172  if (!wf->sectors) {
173  av_free(wf);
174  return NULL;
175  }
176  wf->sectors[0] = first_sector;
177  wf->nb_sectors = 1;
179  } else if (depth == 1) {
181  if (!wf->sectors) {
182  av_free(wf);
183  return NULL;
184  }
185  wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
186  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
187  } else if (depth == 2) {
188  uint32_t sectors1[WTV_SECTOR_SIZE / 4];
189  int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
190  int i;
191 
192  wf->sectors = av_malloc(nb_sectors1 << WTV_SECTOR_BITS);
193  if (!wf->sectors) {
194  av_free(wf);
195  return NULL;
196  }
197  wf->nb_sectors = 0;
198  for (i = 0; i < nb_sectors1; i++) {
199  if (avio_seek(s->pb, (int64_t)sectors1[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)
200  break;
201  wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
202  }
203  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
204  } else {
205  av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
206  av_free(wf);
207  return NULL;
208  }
209 
210  if (!wf->nb_sectors) {
211  av_free(wf->sectors);
212  av_free(wf);
213  return NULL;
214  }
215 
216  /* check length */
217  length &= 0xFFFFFFFFFFFF;
218  if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
219  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);
220  length = (int64_t)wf->nb_sectors << wf->sector_bits;
221  }
222  wf->length = length;
223 
224  /* seek to initial sector */
225  wf->position = 0;
226  if (avio_seek(s->pb, (int64_t)wf->sectors[0] << WTV_SECTOR_BITS, SEEK_SET) < 0) {
227  av_free(wf->sectors);
228  av_free(wf);
229  return NULL;
230  }
231 
232  wf->pb_filesystem = s->pb;
233  buffer = av_malloc(1 << wf->sector_bits);
234  if (!buffer) {
235  av_free(wf->sectors);
236  av_free(wf);
237  return NULL;
238  }
239 
240  pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
242  if (!pb) {
243  av_free(buffer);
244  av_free(wf->sectors);
245  av_free(wf);
246  }
247  return pb;
248 }
249 
251  {0x92,0xB7,0x74,0x91,0x59,0x70,0x70,0x44,0x88,0xDF,0x06,0x3B,0x82,0xCC,0x21,0x3D};
252 
261 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
262 {
263  const uint8_t *buf_end = buf + buf_size;
264 
265  while(buf + 48 <= buf_end) {
266  int dir_length, name_size, first_sector, depth;
267  uint64_t file_length;
268  const uint8_t *name;
269  if (ff_guidcmp(buf, dir_entry_guid)) {
270  av_log(s, AV_LOG_ERROR, "unknown guid "PRI_GUID", expected dir_entry_guid; "
271  "remaining directory entries ignored\n", ARG_GUID(buf));
272  break;
273  }
274  dir_length = AV_RL16(buf + 16);
275  file_length = AV_RL64(buf + 24);
276  name_size = 2 * AV_RL32(buf + 32);
277  if (name_size < 0) {
278  av_log(s, AV_LOG_ERROR,
279  "bad filename length, remaining directory entries ignored\n");
280  break;
281  }
282  if (48 + name_size > buf_end - buf) {
283  av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
284  break;
285  }
286  first_sector = AV_RL32(buf + 40 + name_size);
287  depth = AV_RL32(buf + 44 + name_size);
288 
289  /* compare file name; test optional null terminator */
290  name = buf + 40;
291  if (name_size >= filename_size &&
292  !memcmp(name, filename, filename_size) &&
293  (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
294  return wtvfile_open_sector(first_sector, file_length, depth, s);
295 
296  buf += dir_length;
297  }
298  return 0;
299 }
300 
301 #define wtvfile_open(s, buf, buf_size, filename) \
302  wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
303 
307 static void wtvfile_close(AVIOContext *pb)
308 {
309  WtvFile *wf = pb->opaque;
310  av_free(wf->sectors);
311  av_free(wf);
312  av_free(pb->buffer);
313  av_free(pb);
314 }
315 
316 /*
317  *
318  * Main demuxer
319  *
320  */
321 
322 typedef struct {
324 } WtvStream;
325 
326 typedef struct {
328  int64_t epoch;
329  int64_t pts;
330  int64_t last_valid_pts;
332  /* maintain private seek index, as the AVIndexEntry->pos is relative to the
333  start of the 'timeline' file, not the file system (AVFormatContext->pb) */
337 } WtvContext;
338 
339 typedef struct {
340  enum AVCodecID id;
342 } AVCodecGuid;
343 
344 static enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
345 {
346  int i;
347  for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++) {
348  if (!ff_guidcmp(guids[i].guid, guid))
349  return guids[i].id;
350  }
351  return AV_CODEC_ID_NONE;
352 }
353 
354 /* WTV GUIDs */
355 static const ff_asf_guid wtv_guid =
356  {0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
358  {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
360  {0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
361 static const ff_asf_guid data_guid =
362  {0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
363 static const ff_asf_guid stream_guid =
364  {0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
365 static const ff_asf_guid stream2_guid =
366  {0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
368  {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
370  {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
372  {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
374  {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
376  {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
378  {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
380  {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
382  {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
384  {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
385 
386 /* Windows media GUIDs */
387 
388 #define MEDIASUBTYPE_BASE_GUID \
389  0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71
390 
391 /* Media types */
393  {'a','u','d','s',MEDIASUBTYPE_BASE_GUID};
395  {'v','i','d','s',MEDIASUBTYPE_BASE_GUID};
397  {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
399  {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
401  {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
403  {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
404 
405 /* Media subtypes */
407  {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
409  {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
411  {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
413  {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
415  {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
416 
417 /* Formats */
419  {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
421  {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
423  {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
425  {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
426 static const ff_asf_guid format_none =
427  {0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
428 
429 static const AVCodecGuid video_guids[] = {
430  {AV_CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
432 };
433 
434 static const AVCodecGuid audio_guids[] = {
435  {AV_CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
436  {AV_CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
437  {AV_CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
439 };
440 
441 static int read_probe(AVProbeData *p)
442 {
443  return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
444 }
445 
449 static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
450 {
451  time_t t = (value / 10000000LL) - 11644473600LL;
452  struct tm *tm = gmtime(&t);
453  if (tm)
454  strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
455  else
456  buf[0] = '\0';
457 }
458 
462 static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
463 {
464  time_t t = (value / 10000000LL) - 719162LL*86400LL;
465  struct tm *tm = gmtime(&t);
466  if (tm)
467  strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
468  else
469  buf[0] = '\0';
470 }
471 
475 static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
476 {
477  time_t t = 631112400LL + 86400*av_int2double(value);
478  struct tm *tm = gmtime(&t);
479  if (tm)
480  strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
481  else
482  buf[0] = '\0';
483 }
484 
485 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
486 {
487  char mime[1024];
488  char description[1024];
489  unsigned int filesize;
490  AVStream *st;
491  int64_t pos = avio_tell(pb);
492 
493  avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
494  if (strcmp(mime, "image/jpeg"))
495  goto done;
496 
497  avio_r8(pb);
498  avio_get_str16le(pb, INT_MAX, description, sizeof(description));
499  filesize = avio_rl32(pb);
500  if (!filesize)
501  goto done;
502 
503  st = avformat_new_stream(s, NULL);
504  if (!st)
505  goto done;
506  av_dict_set(&st->metadata, "title", description, 0);
509  st->codec->extradata = av_mallocz(filesize);
510  st->id = -1;
511  if (!st->codec->extradata)
512  goto done;
513  st->codec->extradata_size = filesize;
514  avio_read(pb, st->codec->extradata, filesize);
515 done:
516  avio_seek(pb, pos + length, SEEK_SET);
517 }
518 
519 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
520 {
521  int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
522  char *buf = av_malloc(buf_size);
523  if (!buf)
524  return;
525 
526  if (type == 0 && length == 4) {
527  snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
528  } else if (type == 1) {
529  avio_get_str16le(pb, length, buf, buf_size);
530  if (!strlen(buf)) {
531  av_free(buf);
532  return;
533  }
534  } else if (type == 3 && length == 4) {
535  strcpy(buf, avio_rl32(pb) ? "true" : "false");
536  } else if (type == 4 && length == 8) {
537  int64_t num = avio_rl64(pb);
538  if (!strcmp(key, "WM/EncodingTime") ||
539  !strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
540  filetime_to_iso8601(buf, buf_size, num);
541  else if (!strcmp(key, "WM/WMRVEncodeTime") ||
542  !strcmp(key, "WM/WMRVEndTime"))
543  crazytime_to_iso8601(buf, buf_size, num);
544  else if (!strcmp(key, "WM/WMRVExpirationDate"))
545  oledate_to_iso8601(buf, buf_size, num);
546  else if (!strcmp(key, "WM/WMRVBitrate"))
547  snprintf(buf, buf_size, "%f", av_int2double(num));
548  else
549  snprintf(buf, buf_size, "%"PRIi64, num);
550  } else if (type == 5 && length == 2) {
551  snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
552  } else if (type == 6 && length == 16) {
553  ff_asf_guid guid;
554  avio_read(pb, guid, 16);
555  snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
556  } else if (type == 2 && !strcmp(key, "WM/Picture")) {
557  get_attachment(s, pb, length);
558  av_freep(&buf);
559  return;
560  } else {
561  av_freep(&buf);
562  av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
563  avio_skip(pb, length);
564  return;
565  }
566 
567  av_dict_set(&s->metadata, key, buf, 0);
568  av_freep(&buf);
569 }
570 
575 {
576  ff_asf_guid guid;
577  int length, type;
578  while(!pb->eof_reached) {
579  char key[1024];
580  ff_get_guid(pb, &guid);
581  type = avio_rl32(pb);
582  length = avio_rl32(pb);
583  if (!length)
584  break;
585  if (ff_guidcmp(&guid, metadata_guid)) {
586  av_log(s, AV_LOG_WARNING, "unknown guid "PRI_GUID", expected metadata_guid; "
587  "remaining metadata entries ignored\n", ARG_GUID(guid));
588  break;
589  }
590  avio_get_str16le(pb, INT_MAX, key, sizeof(key));
591  get_tag(s, pb, key, type, length);
592  }
593 
595 }
596 
602 {
603  WtvContext *wtv = s->priv_data;
604  AVIOContext *pb = wtv->pb;
605 
606  avio_skip(pb, 72); // picture aspect ratio is unreliable
607  ff_get_bmp_header(pb, st);
608 
609  return 72 + 40;
610 }
611 
616 {
617  /* fwHeadLayer */
618  switch (AV_RL16(st->codec->extradata)) {
619  case 0x0001 : st->codec->codec_id = AV_CODEC_ID_MP1; break;
620  case 0x0002 : st->codec->codec_id = AV_CODEC_ID_MP2; break;
621  case 0x0004 : st->codec->codec_id = AV_CODEC_ID_MP3; break;
622  }
623 
624  st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
625 
626  /* dwHeadMode */
627  switch (AV_RL16(st->codec->extradata + 6)) {
628  case 1 :
629  case 2 :
630  case 4 : st->codec->channels = 2;
632  break;
633  case 8 : st->codec->channels = 1;
635  break;
636  }
637 }
638 
644 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
645 {
646  if (st) {
647  if (st->codec->extradata) {
648  av_freep(&st->codec->extradata);
649  st->codec->extradata_size = 0;
650  }
651  } else {
652  WtvStream *wst = av_mallocz(sizeof(WtvStream));
653  if (!wst)
654  return NULL;
655  st = avformat_new_stream(s, NULL);
656  if (!st)
657  return NULL;
658  st->id = sid;
659  st->priv_data = wst;
660  }
661  st->codec->codec_type = codec_type;
663  avpriv_set_pts_info(st, 64, 1, 10000000);
664  return st;
665 }
666 
677  ff_asf_guid mediatype, ff_asf_guid subtype,
678  ff_asf_guid formattype, int size)
679 {
680  WtvContext *wtv = s->priv_data;
681  AVIOContext *pb = wtv->pb;
683  !ff_guidcmp(formattype, format_cpfilters_processed)) {
684  ff_asf_guid actual_subtype;
685  ff_asf_guid actual_formattype;
686 
687  if (size < 32) {
688  av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
689  avio_skip(pb, size);
690  return NULL;
691  }
692 
693  avio_skip(pb, size - 32);
694  ff_get_guid(pb, &actual_subtype);
695  ff_get_guid(pb, &actual_formattype);
696  avio_seek(pb, -size, SEEK_CUR);
697 
698  st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
699  avio_skip(pb, 32);
700  return st;
701  } else if (!ff_guidcmp(mediatype, mediatype_audio)) {
702  st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
703  if (!st)
704  return NULL;
705  if (!ff_guidcmp(formattype, format_waveformatex)) {
706  int ret = ff_get_wav_header(pb, st->codec, size);
707  if (ret < 0)
708  return NULL;
709  } else {
710  if (ff_guidcmp(formattype, format_none))
711  av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
712  avio_skip(pb, size);
713  }
714 
715  if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
717  } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
718  if (st->codec->extradata && st->codec->extradata_size >= 22)
720  else
721  av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
722  } else {
723  st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype);
724  if (st->codec->codec_id == AV_CODEC_ID_NONE)
725  av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
726  }
727  return st;
728  } else if (!ff_guidcmp(mediatype, mediatype_video)) {
729  st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
730  if (!st)
731  return NULL;
732  if (!ff_guidcmp(formattype, format_videoinfo2)) {
733  int consumed = parse_videoinfoheader2(s, st);
734  avio_skip(pb, FFMAX(size - consumed, 0));
735  } else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
736  int consumed = parse_videoinfoheader2(s, st);
737  avio_skip(pb, FFMAX(size - consumed, 0));
738  } else {
739  if (ff_guidcmp(formattype, format_none))
740  av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
741  avio_skip(pb, size);
742  }
743 
744  if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
746  } else {
747  st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype);
748  }
749  if (st->codec->codec_id == AV_CODEC_ID_NONE)
750  av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
751  return st;
752  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
754  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
755  if (!st)
756  return NULL;
757  if (ff_guidcmp(formattype, format_none))
758  av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
759  avio_skip(pb, size);
761  return st;
762  } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
764  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
765  if (!st)
766  return NULL;
767  if (ff_guidcmp(formattype, format_none))
768  av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
769  avio_skip(pb, size);
771  return st;
772  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
774  if (ff_guidcmp(formattype, format_none))
775  av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
776  avio_skip(pb, size);
777  return NULL;
778  }
779 
780  av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
781  ", subtype:"PRI_GUID", formattype:"PRI_GUID"\n",
782  ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype));
783  avio_skip(pb, size);
784  return NULL;
785 }
786 
787 enum {
790 };
791 
799 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
800 {
801  WtvContext *wtv = s->priv_data;
802  AVIOContext *pb = wtv->pb;
803  while (!pb->eof_reached) {
804  ff_asf_guid g;
805  int len, sid, consumed;
806 
807  ff_get_guid(pb, &g);
808  len = avio_rl32(pb);
809  if (len < 32)
810  break;
811  sid = avio_rl32(pb) & 0x7FFF;
812  avio_skip(pb, 8);
813  consumed = 32;
814 
815  if (!ff_guidcmp(g, stream_guid)) {
816  if (ff_find_stream_index(s, sid) < 0) {
817  ff_asf_guid mediatype, subtype, formattype;
818  int size;
819  avio_skip(pb, 28);
820  ff_get_guid(pb, &mediatype);
821  ff_get_guid(pb, &subtype);
822  avio_skip(pb, 12);
823  ff_get_guid(pb, &formattype);
824  size = avio_rl32(pb);
825  parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
826  consumed += 92 + size;
827  }
828  } else if (!ff_guidcmp(g, stream2_guid)) {
829  int stream_index = ff_find_stream_index(s, sid);
830  if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
831  ff_asf_guid mediatype, subtype, formattype;
832  int size;
833  avio_skip(pb, 12);
834  ff_get_guid(pb, &mediatype);
835  ff_get_guid(pb, &subtype);
836  avio_skip(pb, 12);
837  ff_get_guid(pb, &formattype);
838  size = avio_rl32(pb);
839  parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
840  consumed += 76 + size;
841  }
848  int stream_index = ff_find_stream_index(s, sid);
849  if (stream_index >= 0) {
850  AVStream *st = s->streams[stream_index];
851  uint8_t buf[258];
852  const uint8_t *pbuf = buf;
853  int buf_size;
854 
855  avio_skip(pb, 8);
856  consumed += 8;
859  avio_skip(pb, 6);
860  consumed += 6;
861  }
862 
863  buf_size = FFMIN(len - consumed, sizeof(buf));
864  avio_read(pb, buf, buf_size);
865  consumed += buf_size;
866  ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
867  }
868  } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
869  int stream_index = ff_find_stream_index(s, sid);
870  if (stream_index >= 0) {
871  AVStream *st = s->streams[stream_index];
872  int audio_type;
873  avio_skip(pb, 8);
874  audio_type = avio_r8(pb);
875  if (audio_type == 2)
877  else if (audio_type == 3)
879  consumed += 9;
880  }
882  int stream_index = ff_find_stream_index(s, sid);
883  if (stream_index >= 0) {
884  avio_skip(pb, 12);
885  if (avio_rl32(pb))
886  av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
887  consumed += 16;
888  }
889  } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
890  int stream_index = ff_find_stream_index(s, sid);
891  if (stream_index >= 0) {
892  AVStream *st = s->streams[stream_index];
893  uint8_t language[4];
894  avio_skip(pb, 12);
895  avio_read(pb, language, 3);
896  if (language[0]) {
897  language[3] = 0;
898  av_dict_set(&st->metadata, "language", language, 0);
899  if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
901  }
902  consumed += 15;
903  }
904  } else if (!ff_guidcmp(g, timestamp_guid)) {
905  int stream_index = ff_find_stream_index(s, sid);
906  if (stream_index >= 0) {
907  avio_skip(pb, 8);
908  wtv->pts = avio_rl64(pb);
909  consumed += 16;
910  if (wtv->pts == -1)
911  wtv->pts = AV_NOPTS_VALUE;
912  else {
913  wtv->last_valid_pts = wtv->pts;
914  if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
915  wtv->epoch = wtv->pts;
916  if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
917 #define WTV_PAD8(x) (((x) + 7) & ~7)
918  avio_skip(pb, WTV_PAD8(len) - consumed);
919  return 0;
920  }
921  }
922  }
923  } else if (!ff_guidcmp(g, data_guid)) {
924  int stream_index = ff_find_stream_index(s, sid);
925  if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) {
926  WtvStream *wst = s->streams[stream_index]->priv_data;
927  wst->seen_data = 1;
928  if (len_ptr) {
929  *len_ptr = len;
930  }
931  return stream_index;
932  }
933  } else if (
934  !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}) ||
935  !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}) ||
936  !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}) ||
937  !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}) ||
938  !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}) ||
939  !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}) ||
940  !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}) ||
941  !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}) ||
942  !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}) ||
943  !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}) ||
944  !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
945  !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
946  !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
947  !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
948  !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
949  !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
950  !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
951  !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
952  //ignore known guids
953  } else
954  av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g));
955 
956  avio_skip(pb, WTV_PAD8(len) - consumed);
957  }
958  return AVERROR_EOF;
959 }
960 
961 /* declare utf16le strings */
962 #define _ , 0,
963 static const uint8_t timeline_le16[] =
964  {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
966  {'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};
968  {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
970  {'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};
971 #undef _
972 
974 {
975  WtvContext *wtv = s->priv_data;
976  int root_sector, root_size;
977  uint8_t root[WTV_SECTOR_SIZE];
978  AVIOContext *pb;
979  int64_t timeline_pos;
980  int ret;
981 
982  wtv->epoch =
983  wtv->pts =
985 
986  /* read root directory sector */
987  avio_skip(s->pb, 0x30);
988  root_size = avio_rl32(s->pb);
989  if (root_size > sizeof(root)) {
990  av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
991  return AVERROR_INVALIDDATA;
992  }
993  avio_skip(s->pb, 4);
994  root_sector = avio_rl32(s->pb);
995 
996  avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
997  root_size = avio_read(s->pb, root, root_size);
998  if (root_size < 0)
999  return AVERROR_INVALIDDATA;
1000 
1001  /* parse chunks up until first data chunk */
1002  wtv->pb = wtvfile_open(s, root, root_size, timeline_le16);
1003  if (!wtv->pb) {
1004  av_log(s, AV_LOG_ERROR, "timeline data missing\n");
1005  return AVERROR_INVALIDDATA;
1006  }
1007 
1008  ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
1009  if (ret < 0)
1010  return ret;
1011  avio_seek(wtv->pb, -32, SEEK_CUR);
1012 
1013  timeline_pos = avio_tell(s->pb); // save before opening another file
1014 
1015  /* read metadata */
1016  pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16);
1017  if (pb) {
1018  parse_legacy_attrib(s, pb);
1019  wtvfile_close(pb);
1020  }
1021 
1022  /* read seek index */
1023  if (s->nb_streams) {
1024  AVStream *st = s->streams[0];
1025  pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16);
1026  if (pb) {
1027  while(1) {
1028  uint64_t timestamp = avio_rl64(pb);
1029  uint64_t frame_nb = avio_rl64(pb);
1030  if (pb->eof_reached)
1031  break;
1033  0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1034  }
1035  wtvfile_close(pb);
1036 
1037  if (wtv->nb_index_entries) {
1038  pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16);
1039  if (pb) {
1040  int i;
1041  while (1) {
1042  uint64_t frame_nb = avio_rl64(pb);
1043  uint64_t position = avio_rl64(pb);
1044  if (pb->eof_reached)
1045  break;
1046  for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
1047  AVIndexEntry *e = wtv->index_entries + i;
1048  if (frame_nb > e->size)
1049  break;
1050  if (position > e->pos)
1051  e->pos = position;
1052  }
1053  }
1054  wtvfile_close(pb);
1055  st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
1056  }
1057  }
1058  }
1059  }
1060 
1061  avio_seek(s->pb, timeline_pos, SEEK_SET);
1062  return 0;
1063 }
1064 
1066 {
1067  WtvContext *wtv = s->priv_data;
1068  AVIOContext *pb = wtv->pb;
1069  int stream_index, len, ret;
1070 
1071  stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1072  if (stream_index < 0)
1073  return stream_index;
1074 
1075  ret = av_get_packet(pb, pkt, len - 32);
1076  if (ret < 0)
1077  return ret;
1078  pkt->stream_index = stream_index;
1079  pkt->pts = wtv->pts;
1080  avio_skip(pb, WTV_PAD8(len) - len);
1081  return 0;
1082 }
1083 
1084 static int read_seek(AVFormatContext *s, int stream_index,
1085  int64_t ts, int flags)
1086 {
1087  WtvContext *wtv = s->priv_data;
1088  AVIOContext *pb = wtv->pb;
1089  AVStream *st = s->streams[0];
1090  int64_t ts_relative;
1091  int i;
1092 
1093  if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1094  return AVERROR(ENOSYS);
1095 
1096  /* timestamp adjustment is required because wtv->pts values are absolute,
1097  * whereas AVIndexEntry->timestamp values are relative to epoch. */
1098  ts_relative = ts;
1099  if (wtv->epoch != AV_NOPTS_VALUE)
1100  ts_relative -= wtv->epoch;
1101 
1102  i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1103  if (i < 0) {
1104  if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
1105  avio_seek(pb, 0, SEEK_SET);
1106  else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
1107  avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
1108  if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1109  return AVERROR(ERANGE);
1110  return 0;
1111  }
1112  wtv->pts = wtv->index_entries[i].timestamp;
1113  if (wtv->epoch != AV_NOPTS_VALUE)
1114  wtv->pts += wtv->epoch;
1115  wtv->last_valid_pts = wtv->pts;
1116  avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
1117  return 0;
1118 }
1119 
1121 {
1122  WtvContext *wtv = s->priv_data;
1123  av_free(wtv->index_entries);
1124  wtvfile_close(wtv->pb);
1125  return 0;
1126 }
1127 
1129  .name = "wtv",
1130  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1131  .priv_data_size = sizeof(WtvContext),
1135  .read_seek = read_seek,
1137  .flags = AVFMT_SHOW_IDS,
1138 };
#define PRI_PRETTY_GUID
Definition: wtv.c:44
#define WTV_BIGSECTOR_BITS
Definition: wtv.c:58
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:61
Bytestream IO Context.
Definition: avio.h:68
static const ff_asf_guid mediatype_video
Definition: wtv.c:394
static const AVCodecGuid video_guids[]
Definition: wtv.c:429
int size
int64_t pts
Definition: wtv.c:329
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:261
enum AVCodecID id
Definition: mxfenc.c:85
static const ff_asf_guid timestamp_guid
Definition: wtv.c:359
static const ff_asf_guid mediatype_audio
Definition: wtv.c:392
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2126
int64_t epoch
timeline file
Definition: wtv.c:328
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
Definition: wtv.c:485
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:3283
int64_t position
Definition: wtv.c:68
int64_t pos
Definition: avformat.h:583
static const AVCodecGuid audio_guids[]
Definition: wtv.c:434
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
parse VIDEOINFOHEADER2 structure
Definition: wtv.c:601
#define ARG_PRETTY_GUID(g)
Definition: wtv.c:46
enum AVCodecID id
Definition: wtv.c:340
int sector_bits
file system (AVFormatContext->pb)
Definition: wtv.c:63
ff_asf_guid guid
Definition: wtv.c:341
#define LEN_PRETTY_GUID
Definition: wtv.c:48
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:39
static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
Definition: wtv.c:114
#define AV_RL16
Definition: intreadwrite.h:42
int error
number of sectors
Definition: wtv.c:67
void * priv_data
Definition: avformat.h:653
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:574
static const ff_asf_guid dir_entry_guid
Definition: wtv.c:250
static const ff_asf_guid stream_guid
Definition: wtv.c:363
#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:1401
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:1065
int seen_data
Definition: wtv.c:323
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:151
static const ff_asf_guid mediatype_mpeg2_sections
Definition: wtv.c:398
Format I/O context.
Definition: avformat.h:828
static const ff_asf_guid mediatype_mstvcaption
Definition: wtv.c:402
uint8_t ff_asf_guid[16]
Definition: asf.h:51
#define AV_RL64
Definition: intreadwrite.h:173
static const ff_asf_guid stream2_guid
Definition: wtv.c:365
static const ff_asf_guid data_guid
Definition: wtv.c:361
Public dictionary API.
static const ff_asf_guid EVENTID_StreamIDSpanningEvent
Definition: wtv.c:379
static const ff_asf_guid EVENTID_SubtitleSpanningEvent
Definition: wtv.c:367
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:420
static int read_probe(AVProbeData *p)
Definition: wtv.c:441
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent
Definition: wtv.c:377
enum AVStreamParseType need_parsing
Definition: avformat.h:775
int id
Format-specific stream ID.
Definition: avformat.h:629
int64_t length
Definition: wtv.c:69
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1454
const char * name
static const ff_asf_guid mediasubtype_dvb_subtitle
Definition: wtv.c:408
AVStream ** streams
Definition: avformat.h:876
const char data[16]
Definition: mxf.c:66
static const ff_asf_guid mediasubtype_teletext
Definition: wtv.c:410
static int flags
Definition: log.c:42
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:218
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:1128
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2704
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: wtv.c:75
static const ff_asf_guid EVENTID_TeletextSpanningEvent
Definition: wtv.c:381
static float t
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:969
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
Definition: wtv.c:519
Definition: wtv.c:60
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:799
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:95
AVDictionary * metadata
Definition: avformat.h:972
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:139
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent
Definition: wtv.c:375
AVIOContext * pb_filesystem
Definition: wtv.c:61
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:546
int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
int64_t timestamp
Definition: avformat.h:584
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
g
Definition: yuv2rgb.c:540
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:348
static int read_close(AVFormatContext *s)
Definition: wtv.c:1120
static const ff_asf_guid mediatype_mpeg2_pes
Definition: wtv.c:400
static void parse_mpeg1waveformatex(AVStream *st)
Parse MPEG1WAVEFORMATEX extradata structure.
Definition: wtv.c:615
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
AVStream * avformat_new_stream(AVFormatContext *s, AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2736
#define WTV_PAD8(x)
Definition: wtv.c:322
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2165
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:437
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:641
AVIOContext * pb
Definition: wtv.c:327
static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent
Definition: wtv.c:371
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:340
unsigned int nb_streams
A list of all streams in the file.
Definition: avformat.h:875
static const ff_asf_guid metadata_guid
Definition: wtv.c:357
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:3417
int bit_rate
the average bitrate
Definition: avcodec.h:1404
audio channel layout utility functions
static const ff_asf_guid format_mpeg2_video
Definition: wtv.c:424
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:31
static const uint8_t table_0_entries_time_le16[]
Definition: wtv.c:967
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:369
static char buffer[20]
Definition: seek-test.c:31
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
Definition: wtv.c:383
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:699
Opaque data information usually sparse.
Definition: avutil.h:183
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:100
Stream structure.
Definition: avformat.h:622
static const ff_asf_guid format_none
Definition: wtv.c:426
NULL
Definition: eval.c:52
static const ff_asf_guid wtv_guid
Definition: wtv.c:355
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent
Definition: wtv.c:373
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:1347
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
Initialise stream.
Definition: wtv.c:644
enum AVMediaType codec_type
Definition: avcodec.h:1347
enum AVCodecID codec_id
Definition: avcodec.h:1350
AVIOContext * pb
I/O context.
Definition: avformat.h:861
#define AV_RN16(p)
Definition: intreadwrite.h:322
static const ff_asf_guid mediasubtype_mpeg2_sections
Definition: wtv.c:414
int nb_index_entries
Definition: wtv.c:335
static enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
Definition: wtv.c:344
#define ARG_GUID(g)
Definition: wtv.c:41
int extradata_size
Definition: avcodec.h:1455
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:63
static void wtvfile_close(AVIOContext *pb)
Close file opened with wtvfile_open_sector(), or wtv_open()
Definition: wtv.c:307
static const ff_asf_guid mediasubtype_cpfilters_processed
Definition: wtv.c:406
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert win32 FILETIME to ISO-8601 string.
Definition: wtv.c:449
const AVMetadataConv ff_asf_metadata_conv[]
Definition: asf.c:140
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:462
static const ff_asf_guid mediasubtype_mpeg1payload
Definition: wtv.c:396
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:338
unsigned int index_entries_allocated_size
Definition: wtv.c:336
static const ff_asf_guid format_videoinfo2
Definition: wtv.c:422
static const ff_asf_guid format_cpfilters_processed
Definition: wtv.c:418
#define PRI_GUID
Definition: wtv.c:39
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:1231
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:684
full parsing and repack
Definition: avformat.h:576
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:530
Main libavformat public API header.
static const uint8_t timeline_le16[]
Definition: wtv.c:963
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:688
static const ff_asf_guid mediasubtype_dtvccdata
Definition: wtv.c:412
static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
Convert OLE DATE to ISO-8601 string.
Definition: wtv.c:475
int64_t last_valid_pts
pts for next data chunk
Definition: wtv.c:330
uint32_t * sectors
sector shift bits; used to convert sector number into pb_filesystem offset
Definition: wtv.c:64
static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
Open file.
Definition: wtv.c:157
int eof_reached
true if eof reached
Definition: avio.h:96
int len
#define WTV_SECTOR_SIZE
Definition: wtv.c:57
#define wtvfile_open(s, buf, buf_size, filename)
Definition: wtv.c:301
int channels
number of audio channels
Definition: avcodec.h:2105
void * priv_data
Format private data.
Definition: avformat.h:848
#define _
Definition: wtv.c:962
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:676
int ff_get_bmp_header(AVIOContext *pb, AVStream *st)
Read BITMAPINFOHEADER structure and set AVStream codec width, height and bits_per_encoded_sample fiel...
static int read_ints(AVIOContext *pb, uint32_t *data, int count)
read non-zero integers (le32) from input stream
Definition: wtv.c:140
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:455
#define MEDIASUBTYPE_BASE_GUID
Definition: wtv.c:388
int stream_index
Definition: avcodec.h:917
int nb_sectors
file allocation table
Definition: wtv.c:65
#define AV_CH_LAYOUT_MONO
void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: asfdec.c:153
static int read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: wtv.c:1084
#define WTV_SECTOR_BITS
Definition: wtv.c:56
This structure stores compressed data.
Definition: avcodec.h:898
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:554
static const uint8_t table_0_entries_legacy_attrib_le16[]
Definition: wtv.c:965
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:158
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: asf.h:178
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:908
static int read_header(AVFormatContext *s)
Definition: wtv.c:973
AVIndexEntry * index_entries
latest valid pts, used for interative seeking
Definition: wtv.c:334