FFmpeg
wtvdec.c
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1 /*
2  * Windows Television (WTV) demuxer
3  * Copyright (c) 2010-2011 Peter Ross <pross@xvid.org>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Windows Television (WTV) demuxer
25  * @author Peter Ross <pross@xvid.org>
26  */
27 
28 #include <inttypes.h>
29 
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/intfloat.h"
34 #include "avformat.h"
35 #include "internal.h"
36 #include "wtv.h"
37 #include "mpegts.h"
38 
39 /* Macros for formatting GUIDs */
40 #define PRI_PRETTY_GUID \
41  "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"
42 #define ARG_PRETTY_GUID(g) \
43  AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15]
44 #define LEN_PRETTY_GUID 34
45 
46 /*
47  * File system routines
48  */
49 
50 typedef struct WtvFile {
51  AVIOContext *pb_filesystem; /**< file system (AVFormatContext->pb) */
52 
53  int sector_bits; /**< sector shift bits; used to convert sector number into pb_filesystem offset */
54  uint32_t *sectors; /**< file allocation table */
55  int nb_sectors; /**< number of sectors */
56 
57  int error;
58  int64_t position;
59  int64_t length;
60 } WtvFile;
61 
62 static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
63 {
64  return avio_seek(pb, (sector << WTV_SECTOR_BITS) + offset, SEEK_SET);
65 }
66 
67 /**
68  * @return bytes read, AVERROR_EOF on end of file, or <0 on error
69  */
70 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
71 {
72  WtvFile *wf = opaque;
73  AVIOContext *pb = wf->pb_filesystem;
74  int nread = 0;
75 
76  if (wf->error || pb->error)
77  return -1;
78  if (wf->position >= wf->length || avio_feof(pb))
79  return AVERROR_EOF;
80 
81  buf_size = FFMIN(buf_size, wf->length - wf->position);
82  while(nread < buf_size) {
83  int n;
84  int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
85  int read_request = FFMIN(buf_size - nread, remaining_in_sector);
86 
87  n = avio_read(pb, buf, read_request);
88  if (n <= 0)
89  break;
90  nread += n;
91  buf += n;
92  wf->position += n;
93  if (n == remaining_in_sector) {
94  int i = wf->position >> wf->sector_bits;
95  if (i >= wf->nb_sectors ||
96  (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
97  seek_by_sector(pb, wf->sectors[i], 0) < 0)) {
98  wf->error = 1;
99  break;
100  }
101  }
102  }
103  return nread;
104 }
105 
106 /**
107  * @return position (or file length)
108  */
109 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
110 {
111  WtvFile *wf = opaque;
112  AVIOContext *pb = wf->pb_filesystem;
113 
114  if (whence == AVSEEK_SIZE)
115  return wf->length;
116  else if (whence == SEEK_CUR)
117  offset = wf->position + offset;
118  else if (whence == SEEK_END)
119  offset = wf->length;
120 
121  wf->error = offset < 0 || offset >= wf->length ||
122  seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits],
123  offset & ((1 << wf->sector_bits) - 1)) < 0;
124  wf->position = offset;
125  return offset;
126 }
127 
128 /**
129  * read non-zero integers (le32) from input stream
130  * @param pb
131  * @param[out] data destination
132  * @param count maximum number of integers to read
133  * @return total number of integers read
134  */
135 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
136 {
137  int i, total = 0;
138  for (i = 0; i < count; i++) {
139  if ((data[total] = avio_rl32(pb)))
140  total++;
141  }
142  return total;
143 }
144 
145 /**
146  * Open file
147  * @param first_sector First sector
148  * @param length Length of file (bytes)
149  * @param depth File allocation table depth
150  * @return NULL on error
151  */
153 {
154  AVIOContext *pb;
155  WtvFile *wf;
156  uint8_t *buffer;
157  int64_t size;
158 
159  if (seek_by_sector(s->pb, first_sector, 0) < 0)
160  return NULL;
161 
162  wf = av_mallocz(sizeof(WtvFile));
163  if (!wf)
164  return NULL;
165 
166  if (depth == 0) {
167  wf->sectors = av_malloc(sizeof(uint32_t));
168  if (!wf->sectors) {
169  av_free(wf);
170  return NULL;
171  }
172  wf->sectors[0] = first_sector;
173  wf->nb_sectors = 1;
174  } else if (depth == 1) {
176  if (!wf->sectors) {
177  av_free(wf);
178  return NULL;
179  }
180  wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
181  } else if (depth == 2) {
182  uint32_t sectors1[WTV_SECTOR_SIZE / 4];
183  int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
184  int i;
185 
186  wf->sectors = av_malloc_array(nb_sectors1, 1 << WTV_SECTOR_BITS);
187  if (!wf->sectors) {
188  av_free(wf);
189  return NULL;
190  }
191  wf->nb_sectors = 0;
192  for (i = 0; i < nb_sectors1; i++) {
193  if (seek_by_sector(s->pb, sectors1[i], 0) < 0)
194  break;
195  wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
196  }
197  } else {
198  av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
199  av_free(wf);
200  return NULL;
201  }
202  wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
203 
204  if (!wf->nb_sectors) {
205  av_freep(&wf->sectors);
206  av_freep(&wf);
207  return NULL;
208  }
209 
210  size = avio_size(s->pb);
211  if (size >= 0 && (int64_t)wf->sectors[wf->nb_sectors - 1] << WTV_SECTOR_BITS > size)
212  av_log(s, AV_LOG_WARNING, "truncated file\n");
213 
214  /* check length */
215  length &= 0xFFFFFFFFFFFF;
216  if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
217  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);
218  length = (int64_t)wf->nb_sectors << wf->sector_bits;
219  }
220  wf->length = length;
221 
222  /* seek to initial sector */
223  wf->position = 0;
224  if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) {
225  av_freep(&wf->sectors);
226  av_freep(&wf);
227  return NULL;
228  }
229 
230  wf->pb_filesystem = s->pb;
231  buffer = av_malloc(1 << wf->sector_bits);
232  if (!buffer) {
233  av_freep(&wf->sectors);
234  av_freep(&wf);
235  return NULL;
236  }
237 
238  pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
240  if (!pb) {
241  av_freep(&buffer);
242  av_freep(&wf->sectors);
243  av_freep(&wf);
244  }
245  return pb;
246 }
247 
248 /**
249  * Open file using filename
250  * @param[in] buf directory buffer
251  * @param buf_size directory buffer size
252  * @param[in] filename
253  * @param filename_size size of filename
254  * @return NULL on error
255  */
256 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
257 {
258  const uint8_t *buf_end = buf + buf_size;
259 
260  while(buf + 48 <= buf_end) {
261  int dir_length, name_size, first_sector, depth;
262  uint64_t file_length;
263  const uint8_t *name;
264  if (ff_guidcmp(buf, ff_dir_entry_guid)) {
265  av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; "
266  "remaining directory entries ignored\n", FF_ARG_GUID(buf));
267  break;
268  }
269  dir_length = AV_RL16(buf + 16);
270  file_length = AV_RL64(buf + 24);
271  name_size = 2 * AV_RL32(buf + 32);
272  if (name_size < 0) {
273  av_log(s, AV_LOG_ERROR,
274  "bad filename length, remaining directory entries ignored\n");
275  break;
276  }
277  if (48 + (int64_t)name_size > buf_end - buf) {
278  av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
279  break;
280  }
281  first_sector = AV_RL32(buf + 40 + name_size);
282  depth = AV_RL32(buf + 44 + name_size);
283 
284  /* compare file name; test optional null terminator */
285  name = buf + 40;
286  if (name_size >= filename_size &&
287  !memcmp(name, filename, filename_size) &&
288  (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
289  return wtvfile_open_sector(first_sector, file_length, depth, s);
290 
291  buf += dir_length;
292  }
293  return 0;
294 }
295 
296 #define wtvfile_open(s, buf, buf_size, filename) \
297  wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
298 
299 /**
300  * Close file opened with wtvfile_open_sector(), or wtv_open()
301  */
302 static void wtvfile_close(AVIOContext *pb)
303 {
304  WtvFile *wf = pb->opaque;
305  av_freep(&wf->sectors);
306  av_freep(&pb->opaque);
307  av_freep(&pb->buffer);
308  avio_context_free(&pb);
309 }
310 
311 /*
312  * Main demuxer
313  */
314 
315 typedef struct WtvStream {
317 } WtvStream;
318 
319 typedef struct WtvContext {
320  AVIOContext *pb; /**< timeline file */
321  int64_t epoch;
322  int64_t pts; /**< pts for next data chunk */
323  int64_t last_valid_pts; /**< latest valid pts, used for interactive seeking */
324 
325  /* maintain private seek index, as the AVIndexEntry->pos is relative to the
326  start of the 'timeline' file, not the file system (AVFormatContext->pb) */
330 } WtvContext;
331 
332 /* WTV GUIDs */
334  {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
336  {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
338  {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
340  {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
342  {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
344  {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
346  {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
348  {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
350  {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
351 
352 /* Windows media GUIDs */
353 
354 /* Media types */
356  {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
358  {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
360  {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
362  {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
363 
364 /* Media subtypes */
366  {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
368  {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
370  {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
372  {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
373 
374 static int read_probe(const AVProbeData *p)
375 {
376  return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
377 }
378 
379 /**
380  * Convert win32 FILETIME to ISO-8601 string
381  * @return <0 on error
382  */
383 static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
384 {
385  time_t t = (value / 10000000LL) - 11644473600LL;
386  struct tm tmbuf;
387  struct tm *tm = gmtime_r(&t, &tmbuf);
388  if (!tm)
389  return -1;
390  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
391  return -1;
392  return 0;
393 }
394 
395 /**
396  * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
397  * @return <0 on error
398  */
399 static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
400 {
401  time_t t = (value / 10000000LL) - 719162LL*86400LL;
402  struct tm tmbuf;
403  struct tm *tm = gmtime_r(&t, &tmbuf);
404  if (!tm)
405  return -1;
406  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
407  return -1;
408  return 0;
409 }
410 
411 /**
412  * Convert OLE DATE to ISO-8601 string
413  * @return <0 on error
414  */
415 static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
416 {
417  time_t t = (av_int2double(value) - 25569.0) * 86400;
418  struct tm tmbuf;
419  struct tm *tm= gmtime_r(&t, &tmbuf);
420  if (!tm)
421  return -1;
422  if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
423  return -1;
424  return 0;
425 }
426 
428 {
429  char mime[1024];
430  char description[1024];
431  unsigned int filesize;
432  AVStream *st;
433  int ret;
434  int64_t pos = avio_tell(pb);
435 
436  avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
437  if (strcmp(mime, "image/jpeg"))
438  goto done;
439 
440  avio_r8(pb);
441  avio_get_str16le(pb, INT_MAX, description, sizeof(description));
442  filesize = avio_rl32(pb);
443  if (!filesize)
444  goto done;
445 
446  st = avformat_new_stream(s, NULL);
447  if (!st)
448  goto done;
449  av_dict_set(&st->metadata, "title", description, 0);
452  st->id = -1;
453  ret = av_get_packet(pb, &st->attached_pic, filesize);
454  if (ret < 0)
455  goto done;
456  st->attached_pic.stream_index = st->index;
459 done:
460  avio_seek(pb, pos + length, SEEK_SET);
461 }
462 
463 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
464 {
465  int buf_size;
466  char *buf;
467 
468  if (!strcmp(key, "WM/MediaThumbType")) {
469  avio_skip(pb, length);
470  return;
471  }
472 
473  buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
474  buf = av_malloc(buf_size);
475  if (!buf)
476  return;
477 
478  if (type == 0 && length == 4) {
479  snprintf(buf, buf_size, "%u", avio_rl32(pb));
480  } else if (type == 1) {
481  avio_get_str16le(pb, length, buf, buf_size);
482  if (!strlen(buf)) {
483  av_free(buf);
484  return;
485  }
486  } else if (type == 3 && length == 4) {
487  strcpy(buf, avio_rl32(pb) ? "true" : "false");
488  } else if (type == 4 && length == 8) {
489  int64_t num = avio_rl64(pb);
490  if (!strcmp(key, "WM/EncodingTime") ||
491  !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) {
492  if (filetime_to_iso8601(buf, buf_size, num) < 0) {
493  av_free(buf);
494  return;
495  }
496  } else if (!strcmp(key, "WM/WMRVEncodeTime") ||
497  !strcmp(key, "WM/WMRVEndTime")) {
498  if (crazytime_to_iso8601(buf, buf_size, num) < 0) {
499  av_free(buf);
500  return;
501  }
502  } else if (!strcmp(key, "WM/WMRVExpirationDate")) {
503  if (oledate_to_iso8601(buf, buf_size, num) < 0 ) {
504  av_free(buf);
505  return;
506  }
507  } else if (!strcmp(key, "WM/WMRVBitrate"))
508  snprintf(buf, buf_size, "%f", av_int2double(num));
509  else
510  snprintf(buf, buf_size, "%"PRIi64, num);
511  } else if (type == 5 && length == 2) {
512  snprintf(buf, buf_size, "%u", avio_rl16(pb));
513  } else if (type == 6 && length == 16) {
514  ff_asf_guid guid;
515  avio_read(pb, guid, 16);
516  snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
517  } else if (type == 2 && !strcmp(key, "WM/Picture")) {
518  get_attachment(s, pb, length);
519  av_freep(&buf);
520  return;
521  } else {
522  av_freep(&buf);
523  av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
524  avio_skip(pb, length);
525  return;
526  }
527 
528  av_dict_set(&s->metadata, key, buf, 0);
529  av_freep(&buf);
530 }
531 
532 /**
533  * Parse metadata entries
534  */
536 {
537  ff_asf_guid guid;
538  int length, type;
539  while(!avio_feof(pb)) {
540  char key[1024];
541  ff_get_guid(pb, &guid);
542  type = avio_rl32(pb);
543  length = avio_rl32(pb);
544  if (!length)
545  break;
546  if (ff_guidcmp(&guid, ff_metadata_guid)) {
547  av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
548  "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
549  break;
550  }
551  avio_get_str16le(pb, INT_MAX, key, sizeof(key));
552  get_tag(s, pb, key, type, length);
553  }
554 
556 }
557 
558 /**
559  * parse VIDEOINFOHEADER2 structure
560  * @return bytes consumed
561  */
563 {
564  WtvContext *wtv = s->priv_data;
565  AVIOContext *pb = wtv->pb;
566 
567  avio_skip(pb, 72); // picture aspect ratio is unreliable
568  st->codecpar->codec_tag = ff_get_bmp_header(pb, st, NULL);
569 
570  return 72 + 40;
571 }
572 
573 /**
574  * Parse MPEG1WAVEFORMATEX extradata structure
575  */
577 {
578  /* fwHeadLayer */
579  switch (AV_RL16(st->codecpar->extradata)) {
580  case 0x0001 : st->codecpar->codec_id = AV_CODEC_ID_MP1; break;
581  case 0x0002 : st->codecpar->codec_id = AV_CODEC_ID_MP2; break;
582  case 0x0004 : st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
583  }
584 
585  st->codecpar->bit_rate = AV_RL32(st->codecpar->extradata + 2); /* dwHeadBitrate */
586 
587  /* dwHeadMode */
588  switch (AV_RL16(st->codecpar->extradata + 6)) {
589  case 1 :
590  case 2 :
591  case 4 : st->codecpar->channels = 2;
593  break;
594  case 8 : st->codecpar->channels = 1;
596  break;
597  }
598 }
599 
600 /**
601  * Initialise stream
602  * @param st Stream to initialise, or NULL to create and initialise new stream
603  * @return NULL on error
604  */
606 {
607  if (st) {
608  if (st->codecpar->extradata) {
609  av_freep(&st->codecpar->extradata);
610  st->codecpar->extradata_size = 0;
611  }
612  } else {
613  WtvStream *wst = av_mallocz(sizeof(WtvStream));
614  if (!wst)
615  return NULL;
616  st = avformat_new_stream(s, NULL);
617  if (!st) {
618  av_free(wst);
619  return NULL;
620  }
621  st->id = sid;
622  st->priv_data = wst;
623  }
626  avpriv_set_pts_info(st, 64, 1, 10000000);
627  return st;
628 }
629 
630 /**
631  * parse Media Type structure and populate stream
632  * @param st Stream, or NULL to create new stream
633  * @param mediatype Mediatype GUID
634  * @param subtype Subtype GUID
635  * @param formattype Format GUID
636  * @param size Size of format buffer
637  * @return NULL on error
638  */
640  ff_asf_guid mediatype, ff_asf_guid subtype,
641  ff_asf_guid formattype, uint64_t size)
642 {
643  WtvContext *wtv = s->priv_data;
644  AVIOContext *pb = wtv->pb;
647  ff_asf_guid actual_subtype;
648  ff_asf_guid actual_formattype;
649 
650  if (size < 32) {
651  av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
652  avio_skip(pb, size);
653  return NULL;
654  }
655 
656  avio_skip(pb, size - 32);
657  ff_get_guid(pb, &actual_subtype);
658  ff_get_guid(pb, &actual_formattype);
659  avio_seek(pb, -size, SEEK_CUR);
660 
661  st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
662  avio_skip(pb, 32);
663  return st;
664  } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
665  st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
666  if (!st)
667  return NULL;
668  if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
669  int ret = ff_get_wav_header(s, pb, st->codecpar, size, 0);
670  if (ret < 0)
671  return NULL;
672  } else {
673  if (ff_guidcmp(formattype, ff_format_none))
674  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
675  avio_skip(pb, size);
676  }
677 
678  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
680  } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
681  if (st->codecpar->extradata && st->codecpar->extradata_size >= 22)
683  else
684  av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
685  } else {
687  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
688  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
689  }
690  return st;
691  } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
692  st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
693  if (!st)
694  return NULL;
695  if (!ff_guidcmp(formattype, ff_format_videoinfo2)) {
696  int consumed = parse_videoinfoheader2(s, st);
697  avio_skip(pb, FFMAX(size - consumed, 0));
698  } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
699  uint64_t consumed = parse_videoinfoheader2(s, st);
700  /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
701  avio_skip(pb, FFMAX(size - consumed, 0));
702  } else {
703  if (ff_guidcmp(formattype, ff_format_none))
704  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
705  avio_skip(pb, size);
706  }
707 
708  if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
710  } else {
712  }
713  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
714  av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
715  return st;
716  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
718  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
719  if (!st)
720  return NULL;
721  if (ff_guidcmp(formattype, ff_format_none))
722  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
723  avio_skip(pb, size);
725  return st;
726  } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
728  st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
729  if (!st)
730  return NULL;
731  if (ff_guidcmp(formattype, ff_format_none))
732  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
733  avio_skip(pb, size);
735  return st;
736  } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
738  if (ff_guidcmp(formattype, ff_format_none))
739  av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
740  avio_skip(pb, size);
741  return NULL;
742  }
743 
744  av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
745  ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
746  FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
747  avio_skip(pb, size);
748  return NULL;
749 }
750 
751 enum {
754 };
755 
756 /**
757  * Try to seek over a broken chunk
758  * @return <0 on error
759  */
760 static int recover(WtvContext *wtv, uint64_t broken_pos)
761 {
762  AVIOContext *pb = wtv->pb;
763  int i;
764  for (i = 0; i < wtv->nb_index_entries; i++) {
765  if (wtv->index_entries[i].pos > broken_pos) {
766  int64_t ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
767  if (ret < 0)
768  return ret;
769  wtv->pts = wtv->index_entries[i].timestamp;
770  return 0;
771  }
772  }
773  return AVERROR(EIO);
774 }
775 
776 /**
777  * Parse WTV chunks
778  * @param mode SEEK_TO_DATA or SEEK_TO_PTS
779  * @param seekts timestamp
780  * @param[out] len_ptr Length of data chunk
781  * @return stream index of data chunk, or <0 on error
782  */
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 (!avio_feof(pb)) {
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  int ret;
795  if (avio_feof(pb))
796  return AVERROR_EOF;
797  av_log(s, AV_LOG_WARNING, "encountered broken chunk\n");
798  if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0)
799  return ret;
800  continue;
801  }
802  sid = avio_rl32(pb) & 0x7FFF;
803  avio_skip(pb, 8);
804  consumed = 32;
805 
807  if (ff_find_stream_index(s, sid) < 0) {
808  ff_asf_guid mediatype, subtype, formattype;
809  int size;
810  avio_skip(pb, 28);
811  ff_get_guid(pb, &mediatype);
812  ff_get_guid(pb, &subtype);
813  avio_skip(pb, 12);
814  ff_get_guid(pb, &formattype);
815  size = avio_rl32(pb);
816  parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
817  consumed += 92 + size;
818  }
819  } else if (!ff_guidcmp(g, ff_stream2_guid)) {
820  int stream_index = ff_find_stream_index(s, sid);
821  if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
822  ff_asf_guid mediatype, subtype, formattype;
823  int size;
824  avio_skip(pb, 12);
825  ff_get_guid(pb, &mediatype);
826  ff_get_guid(pb, &subtype);
827  avio_skip(pb, 12);
828  ff_get_guid(pb, &formattype);
829  size = avio_rl32(pb);
830  parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
831  consumed += 76 + size;
832  }
839  int stream_index = ff_find_stream_index(s, sid);
840  if (stream_index >= 0) {
841  AVStream *st = s->streams[stream_index];
842  uint8_t buf[258];
843  const uint8_t *pbuf = buf;
844  int buf_size;
845 
846  avio_skip(pb, 8);
847  consumed += 8;
850  avio_skip(pb, 6);
851  consumed += 6;
852  }
853 
854  buf_size = FFMIN(len - consumed, sizeof(buf));
855  avio_read(pb, buf, buf_size);
856  consumed += buf_size;
857  ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
858  }
859  } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
860  int stream_index = ff_find_stream_index(s, sid);
861  if (stream_index >= 0) {
862  AVStream *st = s->streams[stream_index];
863  int audio_type;
864  avio_skip(pb, 8);
865  audio_type = avio_r8(pb);
866  if (audio_type == 2)
868  else if (audio_type == 3)
870  consumed += 9;
871  }
873  int stream_index = ff_find_stream_index(s, sid);
874  if (stream_index >= 0) {
875  avio_skip(pb, 12);
876  if (avio_rl32(pb))
877  av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
878  consumed += 16;
879  }
880  } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
881  int stream_index = ff_find_stream_index(s, sid);
882  if (stream_index >= 0) {
883  AVStream *st = s->streams[stream_index];
884  uint8_t language[4];
885  avio_skip(pb, 12);
886  avio_read(pb, language, 3);
887  if (language[0]) {
888  language[3] = 0;
889  av_dict_set(&st->metadata, "language", language, 0);
890  if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
892  }
893  consumed += 15;
894  }
895  } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
896  int stream_index = ff_find_stream_index(s, sid);
897  if (stream_index >= 0) {
898  avio_skip(pb, 8);
899  wtv->pts = avio_rl64(pb);
900  consumed += 16;
901  if (wtv->pts == -1)
902  wtv->pts = AV_NOPTS_VALUE;
903  else {
904  wtv->last_valid_pts = wtv->pts;
905  if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
906  wtv->epoch = wtv->pts;
907  if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
908  avio_skip(pb, WTV_PAD8(len) - consumed);
909  return 0;
910  }
911  }
912  }
913  } else if (!ff_guidcmp(g, ff_data_guid)) {
914  int stream_index = ff_find_stream_index(s, sid);
915  if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
916  WtvStream *wst = s->streams[stream_index]->priv_data;
917  wst->seen_data = 1;
918  if (len_ptr) {
919  *len_ptr = len;
920  }
921  return stream_index;
922  }
923  } else if (!ff_guidcmp(g, /* DSATTRIB_WMDRMProtectionInfo */ (const ff_asf_guid){0x83,0x95,0x74,0x40,0x9D,0x6B,0xEC,0x4E,0xB4,0x3C,0x67,0xA1,0x80,0x1E,0x1A,0x9B})) {
924  int stream_index = ff_find_stream_index(s, sid);
925  if (stream_index >= 0)
926  av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index);
927  } else if (
928  !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}) ||
929  !ff_guidcmp(g, /* DSATTRIB_PBDATAG_ATTRIBUTE */ (const ff_asf_guid){0x79,0x66,0xB5,0xE0,0xB9,0x12,0xCC,0x43,0xB7,0xDF,0x57,0x8C,0xAA,0x5A,0x7B,0x63}) ||
930  !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}) ||
931  !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
932  !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}) ||
933  !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}) ||
934  !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}) ||
935  !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}) ||
936  !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}) ||
937  !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}) ||
938  !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}) ||
939  !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
940  !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
941  !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
942  !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
943  !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
944  !ff_guidcmp(g, ff_index_guid) ||
945  !ff_guidcmp(g, ff_sync_guid) ||
947  !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
948  //ignore known guids
949  } else
950  av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
951 
952  avio_skip(pb, WTV_PAD8(len) - consumed);
953  }
954  return AVERROR_EOF;
955 }
956 
958 {
959  WtvContext *wtv = s->priv_data;
960  unsigned root_sector;
961  int root_size;
962  uint8_t root[WTV_SECTOR_SIZE];
963  AVIOContext *pb;
964  int64_t timeline_pos;
965  int64_t ret;
966 
967  wtv->epoch =
968  wtv->pts =
970 
971  /* read root directory sector */
972  avio_skip(s->pb, 0x30);
973  root_size = avio_rl32(s->pb);
974  if (root_size > sizeof(root)) {
975  av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
976  return AVERROR_INVALIDDATA;
977  }
978  avio_skip(s->pb, 4);
979  root_sector = avio_rl32(s->pb);
980 
981  ret = seek_by_sector(s->pb, root_sector, 0);
982  if (ret < 0)
983  return ret;
984  root_size = avio_read(s->pb, root, root_size);
985  if (root_size < 0)
986  return AVERROR_INVALIDDATA;
987 
988  /* parse chunks up until first data chunk */
989  wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
990  if (!wtv->pb) {
991  av_log(s, AV_LOG_ERROR, "timeline data missing\n");
992  return AVERROR_INVALIDDATA;
993  }
994 
995  ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
996  if (ret < 0)
997  return ret;
998  avio_seek(wtv->pb, -32, SEEK_CUR);
999 
1000  timeline_pos = avio_tell(s->pb); // save before opening another file
1001 
1002  /* read metadata */
1003  pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
1004  if (pb) {
1005  parse_legacy_attrib(s, pb);
1006  wtvfile_close(pb);
1007  }
1008 
1009  s->ctx_flags |= AVFMTCTX_NOHEADER; // Needed for noStreams.wtv
1010 
1011  /* read seek index */
1012  if (s->nb_streams) {
1013  AVStream *st = s->streams[0];
1014  pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
1015  if (pb) {
1016  while(1) {
1017  uint64_t timestamp = avio_rl64(pb);
1018  uint64_t frame_nb = avio_rl64(pb);
1019  if (avio_feof(pb))
1020  break;
1022  0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1023  }
1024  wtvfile_close(pb);
1025 
1026  if (wtv->nb_index_entries) {
1027  pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
1028  if (pb) {
1029  AVIndexEntry *e = wtv->index_entries;
1030  AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1;
1031  uint64_t last_position = 0;
1032  while (1) {
1033  uint64_t frame_nb = avio_rl64(pb);
1034  uint64_t position = avio_rl64(pb);
1035  while (e <= e_end && frame_nb > e->size) {
1036  e->pos = last_position;
1037  e++;
1038  }
1039  if (avio_feof(pb))
1040  break;
1041  last_position = position;
1042  }
1043  e_end->pos = last_position;
1044  wtvfile_close(pb);
1045  st->duration = e_end->timestamp;
1046  }
1047  }
1048  }
1049  }
1050 
1051  avio_seek(s->pb, timeline_pos, SEEK_SET);
1052  return 0;
1053 }
1054 
1056 {
1057  WtvContext *wtv = s->priv_data;
1058  AVIOContext *pb = wtv->pb;
1059  int stream_index, len, ret;
1060 
1061  stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1062  if (stream_index < 0)
1063  return stream_index;
1064 
1065  ret = av_get_packet(pb, pkt, len - 32);
1066  if (ret < 0)
1067  return ret;
1068  pkt->stream_index = stream_index;
1069  pkt->pts = wtv->pts;
1070  avio_skip(pb, WTV_PAD8(len) - len);
1071  return 0;
1072 }
1073 
1074 static int read_seek(AVFormatContext *s, int stream_index,
1075  int64_t ts, int flags)
1076 {
1077  WtvContext *wtv = s->priv_data;
1078  AVIOContext *pb = wtv->pb;
1079  AVStream *st = s->streams[0];
1080  int64_t ts_relative;
1081  int i;
1082 
1083  if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1084  return AVERROR(ENOSYS);
1085 
1086  /* timestamp adjustment is required because wtv->pts values are absolute,
1087  * whereas AVIndexEntry->timestamp values are relative to epoch. */
1088  ts_relative = ts;
1089  if (wtv->epoch != AV_NOPTS_VALUE)
1090  ts_relative -= wtv->epoch;
1091 
1092  i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1093  if (i < 0) {
1094  if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1095  if (avio_seek(pb, 0, SEEK_SET) < 0)
1096  return -1;
1097  } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1098  if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1099  return -1;
1100  }
1101  if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1102  return AVERROR(ERANGE);
1103  return 0;
1104  }
1105  if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1106  return -1;
1107  wtv->pts = wtv->index_entries[i].timestamp;
1108  if (wtv->epoch != AV_NOPTS_VALUE)
1109  wtv->pts += wtv->epoch;
1110  wtv->last_valid_pts = wtv->pts;
1111  return 0;
1112 }
1113 
1115 {
1116  WtvContext *wtv = s->priv_data;
1117  av_freep(&wtv->index_entries);
1118  wtvfile_close(wtv->pb);
1119  return 0;
1120 }
1121 
1123  .name = "wtv",
1124  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1125  .priv_data_size = sizeof(WtvContext),
1129  .read_seek = read_seek,
1131  .flags = AVFMT_SHOW_IDS,
1132 };
const uint8_t ff_table_0_entries_time_le16[40]
Definition: wtv_common.c:56
static int recover(WtvContext *wtv, uint64_t broken_pos)
Try to seek over a broken chunk.
Definition: wtvdec.c:760
#define WTV_SECTOR_BITS
Definition: wtv.h:28
const ff_asf_guid ff_metadata_guid
Definition: wtv_common.c:62
static const ff_asf_guid mediasubtype_mpeg2_sections
Definition: wtvdec.c:371
#define NULL
Definition: coverity.c:32
const ff_asf_guid ff_SBE2_STREAM_DESC_EVENT
Definition: wtv_common.c:33
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:339
#define WTV_BIGSECTOR_BITS
Definition: wtv.h:30
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent
Definition: wtvdec.c:341
int64_t pts
pts for next data chunk
Definition: wtvdec.c:322
static int read_ints(AVIOContext *pb, uint32_t *data, int count)
read non-zero integers (le32) from input stream
Definition: wtvdec.c:135
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3158
int64_t epoch
Definition: wtvdec.c:321
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define FF_ARG_GUID(g)
Definition: riff.h:105
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4926
const char * g
Definition: vf_curves.c:115
int64_t position
Definition: wtvdec.c:58
int64_t pos
Definition: avformat.h:810
static const ff_asf_guid mediatype_mstvcaption
Definition: wtvdec.c:361
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3968
int sector_bits
sector shift bits; used to convert sector number into pb_filesystem offset
Definition: wtvdec.c:53
int index
stream index in AVFormatContext
Definition: avformat.h:882
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
enum AVMediaType codec_type
Definition: rtp.c:37
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
parse VIDEOINFOHEADER2 structure
Definition: wtvdec.c:562
const ff_asf_guid ff_mediatype_video
Definition: wtv_common.c:43
GLint GLenum type
Definition: opengl_enc.c:104
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:839
int error
Definition: wtvdec.c:57
void * priv_data
Definition: avformat.h:896
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:334
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:233
const char * key
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
uint64_t_TMPL AV_RL64
Definition: bytestream.h:87
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)
Internal version of av_index_search_timestamp.
Definition: utils.c:2058
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1407
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a UTF-16 string from pb and convert it to UTF-8.
const ff_asf_guid ff_format_waveformatex
Definition: wtv_common.c:74
int seen_data
Definition: wtvdec.c:316
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:465
const AVCodecGuid ff_codec_wav_guids[]
Definition: riff.c:612
Format I/O context.
Definition: avformat.h:1358
#define gmtime_r
Definition: time_internal.h:34
static const ff_asf_guid mediatype_mpeg2_sections
Definition: wtvdec.c:357
#define PRI_PRETTY_GUID
Definition: wtvdec.c:40
const ff_asf_guid ff_data_guid
Definition: wtv_common.c:31
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wtvdec.c:1055
#define av_malloc(s)
#define FF_MEDIASUBTYPE_BASE_GUID
Definition: riff.h:111
static int read_header(AVFormatContext *s)
Definition: wtvdec.c:957
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1302
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
enum AVStreamParseType need_parsing
Definition: avformat.h:1099
int id
Format-specific stream ID.
Definition: avformat.h:888
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:108
int64_t length
Definition: wtvdec.c:59
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4499
const ff_asf_guid ff_mediatype_audio
Definition: wtv_common.c:41
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
const ff_asf_guid ff_mediasubtype_cpfilters_processed
Definition: wtv_common.c:68
#define AVERROR_EOF
End of file.
Definition: error.h:55
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
Definition: wtvdec.c:463
static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
Convert OLE DATE to ISO-8601 string.
Definition: wtvdec.c:415
static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
Definition: wtvdec.c:62
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:310
ptrdiff_t size
Definition: opengl_enc.c:100
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
const ff_asf_guid ff_sync_guid
Definition: wtv_common.c:37
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4070
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:650
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3997
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1512
static int read_close(AVFormatContext *s)
Definition: wtvdec.c:1114
#define AVINDEX_KEYFRAME
Definition: avformat.h:817
const uint8_t ff_table_0_entries_legacy_attrib_le16[58]
Definition: wtv_common.c:54
Definition: wtvdec.c:50
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
Definition: aviobuf.c:131
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1598
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
Initialise stream.
Definition: wtvdec.c:605
AVInputFormat ff_wtv_demuxer
Definition: wtvdec.c:1122
AVIOContext * pb_filesystem
file system (AVFormatContext->pb)
Definition: wtvdec.c:51
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:772
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:811
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:566
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
Definition: wtvdec.c:427
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3964
Tag description
Definition: snow.txt:206
GLsizei GLsizei * length
Definition: opengl_enc.c:114
int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riffdec.c:32
GLsizei count
Definition: opengl_enc.c:108
#define FFMAX(a, b)
Definition: common.h:94
const uint8_t ff_timeline_table_0_entries_Events_le16[62]
Definition: wtv_common.c:52
#define LEN_PRETTY_GUID
Definition: wtvdec.c:44
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1486
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3986
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:641
AVIOContext * pb
timeline file
Definition: wtvdec.c:320
#define wtvfile_open(s, buf, buf_size, filename)
Definition: wtvdec.c:296
const ff_asf_guid ff_format_cpfilters_processed
Definition: wtv_common.c:72
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert win32 FILETIME to ISO-8601 string.
Definition: wtvdec.c:383
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:5010
audio channel layout utility functions
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent
Definition: wtvdec.c:343
#define FFMIN(a, b)
Definition: common.h:96
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
static const ff_asf_guid mediatype_mpeg2_pes
Definition: wtvdec.c:359
int depth
Definition: wtvenc.c:72
const uint8_t ff_timeline_le16[16]
Definition: wtv_common.c:50
static const ff_asf_guid mediasubtype_mpeg1payload
Definition: wtvdec.c:355
#define WTV_PAD8(x)
Definition: wtv.h:31
const ff_asf_guid ff_timestamp_guid
Definition: wtv_common.c:29
#define s(width, name)
Definition: cbs_vp9.c:257
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
Parse WTV chunks.
Definition: wtvdec.c:783
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
Parse metadata entries.
Definition: wtvdec.c:535
static void wtvfile_close(AVIOContext *pb)
Close file opened with wtvfile_open_sector(), or wtv_open()
Definition: wtvdec.c:302
int n
Definition: avisynth_c.h:760
AVDictionary * metadata
Definition: avformat.h:945
const ff_asf_guid ff_format_mpeg2_video
Definition: wtv_common.c:76
static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string.
Definition: wtvdec.c:399
static const ff_asf_guid EVENTID_StreamIDSpanningEvent
Definition: wtvdec.c:345
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent
Definition: wtvdec.c:339
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:849
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
Definition: wtvdec.c:349
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:840
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: wtvdec.c:70
uint8_t ff_asf_guid[16]
Definition: riff.h:92
Stream structure.
Definition: avformat.h:881
const ff_asf_guid ff_DSATTRIB_TRANSPORT_PROPERTIES
Definition: wtv_common.c:60
static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent
Definition: wtvdec.c:337
#define WTV_SECTOR_SIZE
Definition: wtv.h:29
int ff_add_index_entry(AVIndexEntry **index_entries, int *nb_index_entries, unsigned int *index_entries_allocated_size, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Internal version of av_add_index_entry.
Definition: utils.c:1990
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
int first_sector
Definition: wtvenc.c:73
#define AV_RN16(p)
Definition: intreadwrite.h:360
static const ff_asf_guid EVENTID_SubtitleSpanningEvent
Definition: wtvdec.c:333
int nb_index_entries
Definition: wtvdec.c:328
void * buf
Definition: avisynth_c.h:766
static const ff_asf_guid mediasubtype_teletext
Definition: wtvdec.c:367
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
const ff_asf_guid ff_index_guid
Definition: wtv_common.c:39
Undefined Behavior In the C language
Definition: undefined.txt:3
static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, ff_asf_guid mediatype, ff_asf_guid subtype, ff_asf_guid formattype, uint64_t size)
parse Media Type structure and populate stream
Definition: wtvdec.c:639
const AVCodecGuid ff_video_guids[]
Definition: wtv_common.c:81
static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
Definition: wtvdec.c:109
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2512
const AVMetadataConv ff_asf_metadata_conv[]
Definition: asf.c:159
#define snprintf
Definition: snprintf.h:34
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
unsigned int index_entries_allocated_size
Definition: wtvdec.c:329
static int read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: wtvdec.c:1074
#define flags(name, subs,...)
Definition: cbs_av1.c:561
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:1769
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
full parsing and repack
Definition: avformat.h:800
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:756
Main libavformat public API header.
static void parse_mpeg1waveformatex(AVStream *st)
Parse MPEG1WAVEFORMATEX extradata structure.
Definition: wtvdec.c:576
const ff_asf_guid ff_stream2_guid
Definition: wtv_common.c:64
enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
Definition: riffdec.c:44
const ff_asf_guid ff_dir_entry_guid
Definition: wtv_common.c:25
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
Definition: riffdec.c:194
static AVIOContext * wtvfile_open_sector(unsigned first_sector, uint64_t length, int depth, AVFormatContext *s)
Open file.
Definition: wtvdec.c:152
#define FF_PRI_GUID
Definition: riff.h:101
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:148
#define AVSEEK_SIZE
ORing this as the "whence" parameter to a seek function causes it to return the filesize without seek...
Definition: avio.h:531
int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size)
Read BITMAPINFOHEADER structure and set AVStream codec width, height and bits_per_encoded_sample fiel...
Definition: riffdec.c:211
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
static const ff_asf_guid mediasubtype_dtvccdata
Definition: wtvdec.c:369
const ff_asf_guid ff_format_videoinfo2
Definition: wtv_common.c:78
const ff_asf_guid ff_wtv_guid
Definition: wtv_common.c:27
int64_t last_valid_pts
latest valid pts, used for interactive seeking
Definition: wtvdec.c:323
#define av_free(p)
uint32_t * sectors
file allocation table
Definition: wtvdec.c:54
static const ff_asf_guid EVENTID_LanguageSpanningEvent
Definition: wtvdec.c:335
int len
static const ff_asf_guid mediasubtype_dvb_subtitle
Definition: wtvdec.c:365
void * priv_data
Format private data.
Definition: avformat.h:1386
const ff_asf_guid ff_format_none
Definition: wtv_common.c:45
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:4010
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:2514
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3982
int channels
Audio only.
Definition: avcodec.h:4074
static const ff_asf_guid EVENTID_TeletextSpanningEvent
Definition: wtvdec.c:347
#define av_freep(p)
static int read_probe(const AVProbeData *p)
Definition: wtvdec.c:374
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:361
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3972
const ff_asf_guid ff_stream1_guid
Definition: wtv_common.c:35
int stream_index
Definition: avcodec.h:1482
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int nb_sectors
number of sectors
Definition: wtvdec.c:55
#define AV_CH_LAYOUT_MONO
static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
Open file using filename.
Definition: wtvdec.c:256
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:118
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1457
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:780
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
#define ARG_PRETTY_GUID(g)
Definition: wtvdec.c:42
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1473
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:963
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
GLuint buffer
Definition: opengl_enc.c:101
AVIndexEntry * index_entries
Definition: wtvdec.c:327
const char * name
Definition: opengl_enc.c:102