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"
35 #include "avformat.h"
36 #include "internal.h"
37 #include "riff.h"
38 #include "asf.h"
39 #include "mpegts.h"
40 
41 /* Macros for formatting GUIDs */
42 #define PRI_PRETTY_GUID \
43  "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"
44 #define ARG_PRETTY_GUID(g) \
45  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]
46 #define LEN_PRETTY_GUID 34
47 
48 /*
49  * File system routines
50  */
51 
52 #define WTV_SECTOR_BITS 12
53 #define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS)
54 #define WTV_BIGSECTOR_BITS 18
55 
56 #define SHIFT_SECTOR_BITS(a) ((int64_t)(a) << WTV_SECTOR_BITS)
57 
58 typedef struct WtvFile {
62  uint32_t *sectors;
63  int nb_sectors;
65  int error;
66  int64_t position;
67  int64_t length;
68 } WtvFile;
69 
70 static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
71 {
72  return avio_seek(pb, SHIFT_SECTOR_BITS(sector) + offset, SEEK_SET);
73 }
74 
78 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
79 {
80  WtvFile *wf = opaque;
81  AVIOContext *pb = wf->pb_filesystem;
82  int nread = 0;
83 
84  if (wf->error || pb->error)
85  return -1;
86  if (wf->position >= wf->length || pb->eof_reached)
87  return 0;
88 
89  buf_size = FFMIN(buf_size, wf->length - wf->position);
90  while(nread < buf_size) {
91  int n;
92  int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
93  int read_request = FFMIN(buf_size - nread, remaining_in_sector);
94 
95  n = avio_read(pb, buf, read_request);
96  if (n <= 0)
97  break;
98  nread += n;
99  buf += n;
100  wf->position += n;
101  if (n == remaining_in_sector) {
102  int i = wf->position >> wf->sector_bits;
103  if (i >= wf->nb_sectors ||
104  (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
105  seek_by_sector(pb, wf->sectors[i], 0) < 0)) {
106  wf->error = 1;
107  break;
108  }
109  }
110  }
111  return nread;
112 }
113 
117 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
118 {
119  WtvFile *wf = opaque;
120  AVIOContext *pb = wf->pb_filesystem;
121 
122  if (whence == AVSEEK_SIZE)
123  return wf->length;
124  else if (whence == SEEK_CUR)
125  offset = wf->position + offset;
126  else if (whence == SEEK_END)
127  offset = wf->length;
128 
129  wf->error = offset < 0 || offset >= wf->length ||
130  seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits],
131  offset & ((1 << wf->sector_bits) - 1)) < 0;
132  wf->position = offset;
133  return offset;
134 }
135 
143 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
144 {
145  int i, total = 0;
146  for (i = 0; i < count; i++) {
147  if ((data[total] = avio_rl32(pb)))
148  total++;
149  }
150  return total;
151 }
152 
160 static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
161 {
162  AVIOContext *pb;
163  WtvFile *wf;
164  uint8_t *buffer;
165 
166  if (seek_by_sector(s->pb, first_sector, 0) < 0)
167  return NULL;
168 
169  wf = av_mallocz(sizeof(WtvFile));
170  if (!wf)
171  return NULL;
172 
173  if (depth == 0) {
174  wf->sectors = av_malloc(sizeof(uint32_t));
175  if (!wf->sectors) {
176  av_free(wf);
177  return NULL;
178  }
179  wf->sectors[0] = first_sector;
180  wf->nb_sectors = 1;
182  } else if (depth == 1) {
184  if (!wf->sectors) {
185  av_free(wf);
186  return NULL;
187  }
188  wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
189  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
190  } else if (depth == 2) {
191  uint32_t sectors1[WTV_SECTOR_SIZE / 4];
192  int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
193  int i;
194 
195  wf->sectors = av_malloc(SHIFT_SECTOR_BITS(nb_sectors1));
196  if (!wf->sectors) {
197  av_free(wf);
198  return NULL;
199  }
200  wf->nb_sectors = 0;
201  for (i = 0; i < nb_sectors1; i++) {
202  if (seek_by_sector(s->pb, sectors1[i], 0) < 0)
203  break;
204  wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
205  }
206  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
207  } else {
208  av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
209  av_free(wf);
210  return NULL;
211  }
212 
213  if (!wf->nb_sectors) {
214  av_free(wf->sectors);
215  av_free(wf);
216  return NULL;
217  }
218 
219  /* check length */
220  length &= 0xFFFFFFFFFFFF;
221  if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
222  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);
223  length = (int64_t)wf->nb_sectors << wf->sector_bits;
224  }
225  wf->length = length;
226 
227  /* seek to initial sector */
228  wf->position = 0;
229  if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) {
230  av_free(wf->sectors);
231  av_free(wf);
232  return NULL;
233  }
234 
235  wf->pb_filesystem = s->pb;
236  buffer = av_malloc(1 << wf->sector_bits);
237  if (!buffer) {
238  av_free(wf->sectors);
239  av_free(wf);
240  return NULL;
241  }
242 
243  pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
245  if (!pb) {
246  av_free(buffer);
247  av_free(wf->sectors);
248  av_free(wf);
249  }
250  return pb;
251 }
252 
254  {0x92,0xB7,0x74,0x91,0x59,0x70,0x70,0x44,0x88,0xDF,0x06,0x3B,0x82,0xCC,0x21,0x3D};
255 
264 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
265 {
266  const uint8_t *buf_end = buf + buf_size;
267 
268  while(buf + 48 <= buf_end) {
269  int dir_length, name_size, first_sector, depth;
270  uint64_t file_length;
271  const uint8_t *name;
272  if (ff_guidcmp(buf, dir_entry_guid)) {
273  av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; "
274  "remaining directory entries ignored\n", FF_ARG_GUID(buf));
275  break;
276  }
277  dir_length = AV_RL16(buf + 16);
278  file_length = AV_RL64(buf + 24);
279  name_size = 2 * AV_RL32(buf + 32);
280  if (name_size < 0) {
281  av_log(s, AV_LOG_ERROR,
282  "bad filename length, remaining directory entries ignored\n");
283  break;
284  }
285  if (48 + name_size > buf_end - buf) {
286  av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
287  break;
288  }
289  first_sector = AV_RL32(buf + 40 + name_size);
290  depth = AV_RL32(buf + 44 + name_size);
291 
292  /* compare file name; test optional null terminator */
293  name = buf + 40;
294  if (name_size >= filename_size &&
295  !memcmp(name, filename, filename_size) &&
296  (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
297  return wtvfile_open_sector(first_sector, file_length, depth, s);
298 
299  buf += dir_length;
300  }
301  return 0;
302 }
303 
304 #define wtvfile_open(s, buf, buf_size, filename) \
305  wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
306 
310 static void wtvfile_close(AVIOContext *pb)
311 {
312  WtvFile *wf = pb->opaque;
313  av_free(wf->sectors);
314  av_free(wf);
315  av_free(pb->buffer);
316  av_free(pb);
317 }
318 
319 /*
320  * Main demuxer
321  */
322 
323 typedef struct WtvStream {
325 } WtvStream;
326 
327 typedef struct WtvContext {
329  int64_t epoch;
330  int64_t pts;
331  int64_t last_valid_pts;
333  /* maintain private seek index, as the AVIndexEntry->pos is relative to the
334  start of the 'timeline' file, not the file system (AVFormatContext->pb) */
338 } WtvContext;
339 
340 /* WTV GUIDs */
341 static const ff_asf_guid wtv_guid =
342  {0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
344  {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
346  {0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
347 static const ff_asf_guid data_guid =
348  {0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
349 static const ff_asf_guid stream_guid =
350  {0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
351 static const ff_asf_guid stream2_guid =
352  {0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
354  {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
356  {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
358  {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
360  {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
362  {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
364  {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
366  {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
368  {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
370  {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
371 
372 /* Windows media GUIDs */
373 
374 /* Media types */
376  {'a','u','d','s',FF_MEDIASUBTYPE_BASE_GUID};
378  {'v','i','d','s',FF_MEDIASUBTYPE_BASE_GUID};
380  {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
382  {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
384  {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
386  {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
387 
388 /* Media subtypes */
390  {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
392  {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
394  {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
396  {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
398  {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
399 
400 /* Formats */
402  {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
404  {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
406  {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
408  {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
409 static const ff_asf_guid format_none =
410  {0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
411 
412 static const AVCodecGuid video_guids[] = {
413  {AV_CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
415 };
416 
417 static int read_probe(AVProbeData *p)
418 {
419  return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
420 }
421 
425 static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
426 {
427  time_t t = (value / 10000000LL) - 11644473600LL;
428  struct tm tmbuf;
429  struct tm *tm = gmtime_r(&t, &tmbuf);
430  if (tm) {
431  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
432  buf[0] = '\0';
433  } else
434  buf[0] = '\0';
435 }
436 
440 static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
441 {
442  time_t t = (value / 10000000LL) - 719162LL*86400LL;
443  struct tm tmbuf;
444  struct tm *tm = gmtime_r(&t, &tmbuf);
445  if (tm) {
446  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
447  buf[0] = '\0';
448  } else
449  buf[0] = '\0';
450 }
451 
455 static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
456 {
457  time_t t = 631112400LL + 86400*av_int2double(value);
458  struct tm tmbuf;
459  struct tm *tm = gmtime_r(&t, &tmbuf);
460  if (tm) {
461  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
462  buf[0] = '\0';
463  } else
464  buf[0] = '\0';
465 }
466 
468 {
469  char mime[1024];
470  char description[1024];
471  unsigned int filesize;
472  AVStream *st;
473  int64_t pos = avio_tell(pb);
474 
475  avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
476  if (strcmp(mime, "image/jpeg"))
477  goto done;
478 
479  avio_r8(pb);
480  avio_get_str16le(pb, INT_MAX, description, sizeof(description));
481  filesize = avio_rl32(pb);
482  if (!filesize)
483  goto done;
484 
485  st = avformat_new_stream(s, NULL);
486  if (!st)
487  goto done;
488  av_dict_set(&st->metadata, "title", description, 0);
491  st->codecpar->extradata = av_mallocz(filesize);
492  st->id = -1;
493  if (!st->codecpar->extradata)
494  goto done;
495  st->codecpar->extradata_size = filesize;
496  avio_read(pb, st->codecpar->extradata, filesize);
497 done:
498  avio_seek(pb, pos + length, SEEK_SET);
499 }
500 
501 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
502 {
503  int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
504  char *buf = av_malloc(buf_size);
505  if (!buf)
506  return;
507 
508  if (type == 0 && length == 4) {
509  snprintf(buf, buf_size, "%u", avio_rl32(pb));
510  } else if (type == 1) {
511  avio_get_str16le(pb, length, buf, buf_size);
512  if (!strlen(buf)) {
513  av_free(buf);
514  return;
515  }
516  } else if (type == 3 && length == 4) {
517  strcpy(buf, avio_rl32(pb) ? "true" : "false");
518  } else if (type == 4 && length == 8) {
519  int64_t num = avio_rl64(pb);
520  if (!strcmp(key, "WM/EncodingTime") ||
521  !strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
522  filetime_to_iso8601(buf, buf_size, num);
523  else if (!strcmp(key, "WM/WMRVEncodeTime") ||
524  !strcmp(key, "WM/WMRVEndTime"))
525  crazytime_to_iso8601(buf, buf_size, num);
526  else if (!strcmp(key, "WM/WMRVExpirationDate"))
527  oledate_to_iso8601(buf, buf_size, num);
528  else if (!strcmp(key, "WM/WMRVBitrate"))
529  snprintf(buf, buf_size, "%f", av_int2double(num));
530  else
531  snprintf(buf, buf_size, "%"PRIi64, num);
532  } else if (type == 5 && length == 2) {
533  snprintf(buf, buf_size, "%u", avio_rl16(pb));
534  } else if (type == 6 && length == 16) {
535  ff_asf_guid guid;
536  avio_read(pb, guid, 16);
537  snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
538  } else if (type == 2 && !strcmp(key, "WM/Picture")) {
539  get_attachment(s, pb, length);
540  av_freep(&buf);
541  return;
542  } else {
543  av_freep(&buf);
544  av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
545  avio_skip(pb, length);
546  return;
547  }
548 
549  av_dict_set(&s->metadata, key, buf, 0);
550  av_freep(&buf);
551 }
552 
557 {
558  ff_asf_guid guid;
559  int length, type;
560  while(!pb->eof_reached) {
561  char key[1024];
562  ff_get_guid(pb, &guid);
563  type = avio_rl32(pb);
564  length = avio_rl32(pb);
565  if (!length)
566  break;
567  if (ff_guidcmp(&guid, metadata_guid)) {
568  av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
569  "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
570  break;
571  }
572  avio_get_str16le(pb, INT_MAX, key, sizeof(key));
573  get_tag(s, pb, key, type, length);
574  }
575 
577 }
578 
584 {
585  WtvContext *wtv = s->priv_data;
586  AVIOContext *pb = wtv->pb;
587 
588  avio_skip(pb, 72); // picture aspect ratio is unreliable
589  ff_get_bmp_header(pb, st, NULL);
590 
591  return 72 + 40;
592 }
593 
598 {
599  /* fwHeadLayer */
600  switch (AV_RL16(st->codecpar->extradata)) {
601  case 0x0001 : st->codecpar->codec_id = AV_CODEC_ID_MP1; break;
602  case 0x0002 : st->codecpar->codec_id = AV_CODEC_ID_MP2; break;
603  case 0x0004 : st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
604  }
605 
606  st->codecpar->bit_rate = AV_RL32(st->codecpar->extradata + 2); /* dwHeadBitrate */
607 
608  /* dwHeadMode */
609  switch (AV_RL16(st->codecpar->extradata + 6)) {
610  case 1 :
611  case 2 :
612  case 4 : st->codecpar->channels = 2;
614  break;
615  case 8 : st->codecpar->channels = 1;
617  break;
618  }
619 }
620 
626 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
627 {
628  if (st) {
629  if (st->codecpar->extradata) {
630  av_freep(&st->codecpar->extradata);
631  st->codecpar->extradata_size = 0;
632  }
633  } else {
634  WtvStream *wst = av_mallocz(sizeof(WtvStream));
635  if (!wst)
636  return NULL;
637  st = avformat_new_stream(s, NULL);
638  if (!st) {
639  av_free(wst);
640  return NULL;
641  }
642  st->id = sid;
643  st->priv_data = wst;
644  }
647  avpriv_set_pts_info(st, 64, 1, 10000000);
648  return st;
649 }
650 
661  ff_asf_guid mediatype, ff_asf_guid subtype,
662  ff_asf_guid formattype, int size)
663 {
664  WtvContext *wtv = s->priv_data;
665  AVIOContext *pb = wtv->pb;
667  !ff_guidcmp(formattype, format_cpfilters_processed)) {
668  ff_asf_guid actual_subtype;
669  ff_asf_guid actual_formattype;
670 
671  if (size < 32) {
672  av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
673  avio_skip(pb, size);
674  return NULL;
675  }
676 
677  avio_skip(pb, size - 32);
678  ff_get_guid(pb, &actual_subtype);
679  ff_get_guid(pb, &actual_formattype);
680  avio_seek(pb, -size, SEEK_CUR);
681 
682  st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
683  avio_skip(pb, 32);
684  return st;
685  } else if (!ff_guidcmp(mediatype, mediatype_audio)) {
686  st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
687  if (!st)
688  return NULL;
689  if (!ff_guidcmp(formattype, format_waveformatex)) {
690  int ret = ff_get_wav_header(s, pb, st->codecpar, size);
691  if (ret < 0)
692  return NULL;
693  } else {
694  if (ff_guidcmp(formattype, format_none))
695  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
696  avio_skip(pb, size);
697  }
698 
699  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
701  } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
702  if (st->codecpar->extradata && st->codecpar->extradata_size >= 22)
704  else
705  av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
706  } else {
708  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
709  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
710  }
711  return st;
712  } else if (!ff_guidcmp(mediatype, mediatype_video)) {
713  st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
714  if (!st)
715  return NULL;
716  if (!ff_guidcmp(formattype, format_videoinfo2)) {
717  int consumed = parse_videoinfoheader2(s, st);
718  avio_skip(pb, FFMAX(size - consumed, 0));
719  } else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
720  int consumed = parse_videoinfoheader2(s, st);
721  avio_skip(pb, FFMAX(size - consumed, 0));
722  } else {
723  if (ff_guidcmp(formattype, format_none))
724  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
725  avio_skip(pb, size);
726  }
727 
728  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
730  } else {
731  st->codecpar->codec_id = ff_codec_guid_get_id(video_guids, subtype);
732  }
733  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
734  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
735  return st;
736  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
738  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
739  if (!st)
740  return NULL;
741  if (ff_guidcmp(formattype, format_none))
742  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
743  avio_skip(pb, size);
745  return st;
746  } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
748  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
749  if (!st)
750  return NULL;
751  if (ff_guidcmp(formattype, format_none))
752  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
753  avio_skip(pb, size);
755  return st;
756  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
758  if (ff_guidcmp(formattype, format_none))
759  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
760  avio_skip(pb, size);
761  return NULL;
762  }
763 
764  av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
765  ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
766  FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
767  avio_skip(pb, size);
768  return NULL;
769 }
770 
771 enum {
774 };
775 
783 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
784 {
785  WtvContext *wtv = s->priv_data;
786  AVIOContext *pb = wtv->pb;
787  while (!pb->eof_reached) {
788  ff_asf_guid g;
789  int len, sid, consumed;
790 
791  ff_get_guid(pb, &g);
792  len = avio_rl32(pb);
793  if (len < 32)
794  break;
795  sid = avio_rl32(pb) & 0x7FFF;
796  avio_skip(pb, 8);
797  consumed = 32;
798 
799  if (!ff_guidcmp(g, stream_guid)) {
800  if (ff_find_stream_index(s, sid) < 0) {
801  ff_asf_guid mediatype, subtype, formattype;
802  int size;
803  avio_skip(pb, 28);
804  ff_get_guid(pb, &mediatype);
805  ff_get_guid(pb, &subtype);
806  avio_skip(pb, 12);
807  ff_get_guid(pb, &formattype);
808  size = avio_rl32(pb);
809  parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
810  consumed += 92 + size;
811  }
812  } else if (!ff_guidcmp(g, stream2_guid)) {
813  int stream_index = ff_find_stream_index(s, sid);
814  if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
815  ff_asf_guid mediatype, subtype, formattype;
816  int size;
817  avio_skip(pb, 12);
818  ff_get_guid(pb, &mediatype);
819  ff_get_guid(pb, &subtype);
820  avio_skip(pb, 12);
821  ff_get_guid(pb, &formattype);
822  size = avio_rl32(pb);
823  parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
824  consumed += 76 + size;
825  }
832  int stream_index = ff_find_stream_index(s, sid);
833  if (stream_index >= 0) {
834  AVStream *st = s->streams[stream_index];
835  uint8_t buf[258];
836  const uint8_t *pbuf = buf;
837  int buf_size;
838 
839  avio_skip(pb, 8);
840  consumed += 8;
843  avio_skip(pb, 6);
844  consumed += 6;
845  }
846 
847  buf_size = FFMIN(len - consumed, sizeof(buf));
848  avio_read(pb, buf, buf_size);
849  consumed += buf_size;
850  ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
851  }
852  } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
853  int stream_index = ff_find_stream_index(s, sid);
854  if (stream_index >= 0) {
855  AVStream *st = s->streams[stream_index];
856  int audio_type;
857  avio_skip(pb, 8);
858  audio_type = avio_r8(pb);
859  if (audio_type == 2)
861  else if (audio_type == 3)
863  consumed += 9;
864  }
866  int stream_index = ff_find_stream_index(s, sid);
867  if (stream_index >= 0) {
868  avio_skip(pb, 12);
869  if (avio_rl32(pb))
870  av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
871  consumed += 16;
872  }
873  } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
874  int stream_index = ff_find_stream_index(s, sid);
875  if (stream_index >= 0) {
876  AVStream *st = s->streams[stream_index];
877  uint8_t language[4];
878  avio_skip(pb, 12);
879  avio_read(pb, language, 3);
880  if (language[0]) {
881  language[3] = 0;
882  av_dict_set(&st->metadata, "language", language, 0);
883  if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
885  }
886  consumed += 15;
887  }
888  } else if (!ff_guidcmp(g, timestamp_guid)) {
889  int stream_index = ff_find_stream_index(s, sid);
890  if (stream_index >= 0) {
891  avio_skip(pb, 8);
892  wtv->pts = avio_rl64(pb);
893  consumed += 16;
894  if (wtv->pts == -1)
895  wtv->pts = AV_NOPTS_VALUE;
896  else {
897  wtv->last_valid_pts = wtv->pts;
898  if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
899  wtv->epoch = wtv->pts;
900  if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
901 #define WTV_PAD8(x) (((x) + 7) & ~7)
902  avio_skip(pb, WTV_PAD8(len) - consumed);
903  return 0;
904  }
905  }
906  }
907  } else if (!ff_guidcmp(g, data_guid)) {
908  int stream_index = ff_find_stream_index(s, sid);
909  if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) {
910  WtvStream *wst = s->streams[stream_index]->priv_data;
911  wst->seen_data = 1;
912  if (len_ptr) {
913  *len_ptr = len;
914  }
915  return stream_index;
916  }
917  } else if (
918  !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}) ||
919  !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}) ||
920  !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}) ||
921  !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}) ||
922  !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}) ||
923  !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}) ||
924  !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}) ||
925  !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}) ||
926  !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}) ||
927  !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}) ||
928  !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
929  !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
930  !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
931  !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
932  !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
933  !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
934  !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
935  !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
936  //ignore known guids
937  } else
938  av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
939 
940  avio_skip(pb, WTV_PAD8(len) - consumed);
941  }
942  return AVERROR_EOF;
943 }
944 
945 /* declare utf16le strings */
946 #define _ , 0,
947 static const uint8_t timeline_le16[] =
948  {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
950  {'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};
952  {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
954  {'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};
955 #undef _
956 
958 {
959  WtvContext *wtv = s->priv_data;
960  int root_sector, root_size;
961  uint8_t root[WTV_SECTOR_SIZE];
962  AVIOContext *pb;
963  int64_t timeline_pos;
964  int ret;
965 
966  wtv->epoch =
967  wtv->pts =
969 
970  /* read root directory sector */
971  avio_skip(s->pb, 0x30);
972  root_size = avio_rl32(s->pb);
973  if (root_size > sizeof(root)) {
974  av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
975  return AVERROR_INVALIDDATA;
976  }
977  avio_skip(s->pb, 4);
978  root_sector = avio_rl32(s->pb);
979 
980  ret = seek_by_sector(s->pb, root_sector, 0);
981  if (ret < 0)
982  return ret;
983  root_size = avio_read(s->pb, root, root_size);
984  if (root_size < 0)
985  return AVERROR_INVALIDDATA;
986 
987  /* parse chunks up until first data chunk */
988  wtv->pb = wtvfile_open(s, root, root_size, timeline_le16);
989  if (!wtv->pb) {
990  av_log(s, AV_LOG_ERROR, "timeline data missing\n");
991  return AVERROR_INVALIDDATA;
992  }
993 
994  ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
995  if (ret < 0)
996  return ret;
997  avio_seek(wtv->pb, -32, SEEK_CUR);
998 
999  timeline_pos = avio_tell(s->pb); // save before opening another file
1000 
1001  /* read metadata */
1002  pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16);
1003  if (pb) {
1004  parse_legacy_attrib(s, pb);
1005  wtvfile_close(pb);
1006  }
1007 
1008  /* read seek index */
1009  if (s->nb_streams) {
1010  AVStream *st = s->streams[0];
1011  pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16);
1012  if (pb) {
1013  while(1) {
1014  uint64_t timestamp = avio_rl64(pb);
1015  uint64_t frame_nb = avio_rl64(pb);
1016  if (pb->eof_reached)
1017  break;
1019  0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1020  }
1021  wtvfile_close(pb);
1022 
1023  if (wtv->nb_index_entries) {
1024  pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16);
1025  if (pb) {
1026  int i;
1027  while (1) {
1028  uint64_t frame_nb = avio_rl64(pb);
1029  uint64_t position = avio_rl64(pb);
1030  if (pb->eof_reached)
1031  break;
1032  for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
1033  AVIndexEntry *e = wtv->index_entries + i;
1034  if (frame_nb > e->size)
1035  break;
1036  if (position > e->pos)
1037  e->pos = position;
1038  }
1039  }
1040  wtvfile_close(pb);
1041  st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
1042  }
1043  }
1044  }
1045  }
1046 
1047  avio_seek(s->pb, timeline_pos, SEEK_SET);
1048  return 0;
1049 }
1050 
1052 {
1053  WtvContext *wtv = s->priv_data;
1054  AVIOContext *pb = wtv->pb;
1055  int stream_index, len, ret;
1056 
1057  stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1058  if (stream_index < 0)
1059  return stream_index;
1060 
1061  ret = av_get_packet(pb, pkt, len - 32);
1062  if (ret < 0)
1063  return ret;
1064  pkt->stream_index = stream_index;
1065  pkt->pts = wtv->pts;
1066  avio_skip(pb, WTV_PAD8(len) - len);
1067  return 0;
1068 }
1069 
1070 static int read_seek(AVFormatContext *s, int stream_index,
1071  int64_t ts, int flags)
1072 {
1073  WtvContext *wtv = s->priv_data;
1074  AVIOContext *pb = wtv->pb;
1075  AVStream *st = s->streams[0];
1076  int64_t ts_relative;
1077  int i;
1078 
1079  if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1080  return AVERROR(ENOSYS);
1081 
1082  /* timestamp adjustment is required because wtv->pts values are absolute,
1083  * whereas AVIndexEntry->timestamp values are relative to epoch. */
1084  ts_relative = ts;
1085  if (wtv->epoch != AV_NOPTS_VALUE)
1086  ts_relative -= wtv->epoch;
1087 
1088  i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1089  if (i < 0) {
1090  if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
1091  avio_seek(pb, 0, SEEK_SET);
1092  else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
1093  avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
1094  if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1095  return AVERROR(ERANGE);
1096  return 0;
1097  }
1098  wtv->pts = wtv->index_entries[i].timestamp;
1099  if (wtv->epoch != AV_NOPTS_VALUE)
1100  wtv->pts += wtv->epoch;
1101  wtv->last_valid_pts = wtv->pts;
1102  avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
1103  return 0;
1104 }
1105 
1107 {
1108  WtvContext *wtv = s->priv_data;
1109  av_free(wtv->index_entries);
1110  wtvfile_close(wtv->pb);
1111  return 0;
1112 }
1113 
1115  .name = "wtv",
1116  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1117  .priv_data_size = sizeof(WtvContext),
1121  .read_seek = read_seek,
1123  .flags = AVFMT_SHOW_IDS,
1124 };
#define PRI_PRETTY_GUID
Definition: wtv.c:42
#define WTV_BIGSECTOR_BITS
Definition: wtv.c:54
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:70
Bytestream IO Context.
Definition: avio.h:104
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
static const ff_asf_guid mediatype_video
Definition: wtv.c:377
static const AVCodecGuid video_guids[]
Definition: wtv.c:412
int size
int64_t pts
Definition: wtv.c:330
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:264
static const ff_asf_guid timestamp_guid
Definition: wtv.c:345
static const ff_asf_guid mediatype_audio
Definition: wtv.c:375
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:1983
int64_t epoch
timeline file
Definition: wtv.c:329
static av_always_inline int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riff.h:95
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
Definition: wtv.c:467
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:130
#define FF_ARG_GUID(g)
Definition: riff.h:83
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:2986
int64_t position
Definition: wtv.c:66
int64_t pos
Definition: avformat.h:664
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
parse VIDEOINFOHEADER2 structure
Definition: wtv.c:583
#define ARG_PRETTY_GUID(g)
Definition: wtv.c:44
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3483
int sector_bits
file system (AVFormatContext->pb)
Definition: wtv.c:61
#define LEN_PRETTY_GUID
Definition: wtv.c:46
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:242
unsigned char * buffer
Start of the buffer.
Definition: avio.h:118
enum AVMediaType codec_type
Definition: rtp.c:36
static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
Definition: wtv.c:117
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:685
int error
number of sectors
Definition: wtv.c:65
void * priv_data
Definition: avformat.h:720
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:125
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
Parse metadata entries.
Definition: wtv.c:556
static const ff_asf_guid dir_entry_guid
Definition: wtv.c:253
static const ff_asf_guid stream_guid
Definition: wtv.c:349
#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:1222
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:1051
int seen_data
Definition: wtv.c:324
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:202
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:414
static const ff_asf_guid mediatype_mpeg2_sections
Definition: wtv.c:381
Format I/O context.
Definition: avformat.h:940
static const ff_asf_guid mediatype_mstvcaption
Definition: wtv.c:385
#define AV_RL64
Definition: intreadwrite.h:173
static const ff_asf_guid stream2_guid
Definition: wtv.c:351
static const ff_asf_guid data_guid
Definition: wtv.c:347
Public dictionary API.
static const ff_asf_guid EVENTID_StreamIDSpanningEvent
Definition: wtv.c:365
static char buffer[20]
Definition: seek.c:32
static const ff_asf_guid EVENTID_SubtitleSpanningEvent
Definition: wtv.c:353
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:403
#define FF_MEDIASUBTYPE_BASE_GUID
Definition: riff.h:87
static int read_probe(AVProbeData *p)
Definition: wtv.c:417
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent
Definition: wtv.c:363
enum AVStreamParseType need_parsing
Definition: avformat.h:879
int id
Format-specific stream ID.
Definition: avformat.h:712
int64_t length
Definition: wtv.c:67
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2648
static const ff_asf_guid mediasubtype_dvb_subtitle
Definition: wtv.c:391
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1008
const char data[16]
Definition: mxf.c:70
static const ff_asf_guid mediasubtype_teletext
Definition: wtv.c:393
static int flags
Definition: log.c:50
#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:295
AVInputFormat ff_wtv_demuxer
Definition: wtv.c:1114
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: wtv.c:78
static const ff_asf_guid EVENTID_TeletextSpanningEvent
Definition: wtv.c:367
uint64_t channel_layout
Audio only.
Definition: avcodec.h:3556
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:545
static const uint8_t timeline_table_0_entries_Events_le16[]
Definition: wtv.c:953
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
Definition: wtv.c:501
#define AVINDEX_KEYFRAME
Definition: avformat.h:666
Definition: wtv.c:58
#define SHIFT_SECTOR_BITS(a)
Definition: wtv.c:56
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:151
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
Parse WTV chunks.
Definition: wtv.c:783
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1148
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:190
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent
Definition: wtv.c:361
AVIOContext * pb_filesystem
Definition: wtv.c:59
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:665
#define AVERROR(e)
Definition: error.h:43
int64_t timestamp
Definition: avformat.h:665
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
g
Definition: yuv2rgb.c:546
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:479
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3479
static int read_close(AVFormatContext *s)
Definition: wtv.c:1106
static const ff_asf_guid mediatype_mpeg2_pes
Definition: wtv.c:383
static void parse_mpeg1waveformatex(AVStream *st)
Parse MPEG1WAVEFORMATEX extradata structure.
Definition: wtv.c:597
#define WTV_PAD8(x)
Definition: wtv.c:323
#define FFMAX(a, b)
Definition: common.h:64
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3501
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:536
AVIOContext * pb
Definition: wtv.c:328
int bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3512
static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent
Definition: wtv.c:357
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:400
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:996
static const ff_asf_guid metadata_guid
Definition: wtv.c:343
const char * name
Definition: qsvenc.c:44
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:3063
audio channel layout utility functions
static const ff_asf_guid format_mpeg2_video
Definition: wtv.c:407
#define FFMIN(a, b)
Definition: common.h:66
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:29
static const uint8_t table_0_entries_time_le16[]
Definition: wtv.c:951
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: avio.h:286
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:355
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
Definition: wtv.c:369
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:772
Opaque data information usually sparse.
Definition: avutil.h:198
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:198
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:686
uint8_t ff_asf_guid[16]
Definition: riff.h:71
Stream structure.
Definition: avformat.h:705
const AVCodecGuid ff_codec_wav_guids[]
Definition: riffdec.c:32
static const ff_asf_guid format_none
Definition: wtv.c:409
NULL
Definition: eval.c:55
static const ff_asf_guid wtv_guid
Definition: wtv.c:341
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent
Definition: wtv.c:359
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:1164
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
Initialise stream.
Definition: wtv.c:626
AVIOContext * pb
I/O context.
Definition: avformat.h:982
#define AV_RN16(p)
Definition: intreadwrite.h:333
static const ff_asf_guid mediasubtype_mpeg2_sections
Definition: wtv.c:397
int nb_index_entries
Definition: wtv.c:336
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:310
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:1658
static const ff_asf_guid mediasubtype_cpfilters_processed
Definition: wtv.c:389
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert win32 FILETIME to ISO-8601 string.
Definition: wtv.c:425
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:440
static const ff_asf_guid mediasubtype_mpeg1payload
Definition: wtv.c:379
int error
contains the error code or 0 if no error happened
Definition: avio.h:138
This structure contains the data a format has to probe a file.
Definition: avformat.h:398
unsigned int index_entries_allocated_size
Definition: wtv.c:337
static const ff_asf_guid format_videoinfo2
Definition: wtv.c:405
static const ff_asf_guid format_cpfilters_processed
Definition: wtv.c:401
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:1352
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:757
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:407
full parsing and repack
Definition: avformat.h:657
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:649
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:947
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
Definition: riffdec.c:166
#define FF_PRI_GUID
Definition: riff.h:80
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:761
static const ff_asf_guid mediasubtype_dtvccdata
Definition: wtv.c:395
#define AVSEEK_SIZE
ORing this as the "whence" parameter to a seek function causes it to return the filesize without seek...
Definition: avio.h:266
int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size)
Read BITMAPINFOHEADER structure and set AVStream codec width, height and bits_per_encoded_sample fiel...
Definition: riffdec.c:183
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:455
int64_t last_valid_pts
pts for next data chunk
Definition: wtv.c:331
uint32_t * sectors
sector shift bits; used to convert sector number into pb_filesystem offset
Definition: wtv.c:62
static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
Open file.
Definition: wtv.c:160
int eof_reached
true if eof reached
Definition: avio.h:132
int len
#define WTV_SECTOR_SIZE
Definition: wtv.c:53
#define wtvfile_open(s, buf, buf_size, filename)
Definition: wtv.c:304
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size)
Definition: riffdec.c:82
void * priv_data
Format private data.
Definition: avformat.h:968
int bits_per_coded_sample
Definition: avcodec.h:3514
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:1660
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3497
#define _
Definition: wtv.c:946
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:660
int channels
Audio only.
Definition: avcodec.h:3560
static int read_ints(AVIOContext *pb, uint32_t *data, int count)
read non-zero integers (le32) from input stream
Definition: wtv.c:143
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:529
AVCodecParameters * codecpar
Definition: avformat.h:831
int stream_index
Definition: avcodec.h:1348
int nb_sectors
file allocation table
Definition: wtv.c:63
#define AV_CH_LAYOUT_MONO
static int read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: wtv.c:1070
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:90
#define WTV_SECTOR_BITS
Definition: wtv.c:52
This structure stores compressed data.
Definition: avcodec.h:1323
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:673
static const uint8_t table_0_entries_legacy_attrib_le16[]
Definition: wtv.c:949
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:211
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1339
static int read_header(AVFormatContext *s)
Definition: wtv.c:957
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:235
AVIndexEntry * index_entries
latest valid pts, used for interactive seeking
Definition: wtv.c:335