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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, 0 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 0;
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  */
152 static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
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  av_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(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  int root_sector, root_size;
961  uint8_t root[WTV_SECTOR_SIZE];
962  AVIOContext *pb;
963  int64_t timeline_pos;
964  int64_t 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, ff_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, ff_table_0_entries_legacy_attrib_le16);
1003  if (pb) {
1004  parse_legacy_attrib(s, pb);
1005  wtvfile_close(pb);
1006  }
1007 
1008  s->ctx_flags |= AVFMTCTX_NOHEADER; // Needed for noStreams.wtv
1009 
1010  /* read seek index */
1011  if (s->nb_streams) {
1012  AVStream *st = s->streams[0];
1013  pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
1014  if (pb) {
1015  while(1) {
1016  uint64_t timestamp = avio_rl64(pb);
1017  uint64_t frame_nb = avio_rl64(pb);
1018  if (avio_feof(pb))
1019  break;
1021  0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1022  }
1023  wtvfile_close(pb);
1024 
1025  if (wtv->nb_index_entries) {
1026  pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
1027  if (pb) {
1028  AVIndexEntry *e = wtv->index_entries;
1029  AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1;
1030  uint64_t last_position = 0;
1031  while (1) {
1032  uint64_t frame_nb = avio_rl64(pb);
1033  uint64_t position = avio_rl64(pb);
1034  while (e <= e_end && frame_nb > e->size) {
1035  e->pos = last_position;
1036  e++;
1037  }
1038  if (avio_feof(pb))
1039  break;
1040  last_position = position;
1041  }
1042  e_end->pos = last_position;
1043  wtvfile_close(pb);
1044  st->duration = e_end->timestamp;
1045  }
1046  }
1047  }
1048  }
1049 
1050  avio_seek(s->pb, timeline_pos, SEEK_SET);
1051  return 0;
1052 }
1053 
1055 {
1056  WtvContext *wtv = s->priv_data;
1057  AVIOContext *pb = wtv->pb;
1058  int stream_index, len, ret;
1059 
1060  stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1061  if (stream_index < 0)
1062  return stream_index;
1063 
1064  ret = av_get_packet(pb, pkt, len - 32);
1065  if (ret < 0)
1066  return ret;
1067  pkt->stream_index = stream_index;
1068  pkt->pts = wtv->pts;
1069  avio_skip(pb, WTV_PAD8(len) - len);
1070  return 0;
1071 }
1072 
1073 static int read_seek(AVFormatContext *s, int stream_index,
1074  int64_t ts, int flags)
1075 {
1076  WtvContext *wtv = s->priv_data;
1077  AVIOContext *pb = wtv->pb;
1078  AVStream *st = s->streams[0];
1079  int64_t ts_relative;
1080  int i;
1081 
1082  if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1083  return AVERROR(ENOSYS);
1084 
1085  /* timestamp adjustment is required because wtv->pts values are absolute,
1086  * whereas AVIndexEntry->timestamp values are relative to epoch. */
1087  ts_relative = ts;
1088  if (wtv->epoch != AV_NOPTS_VALUE)
1089  ts_relative -= wtv->epoch;
1090 
1091  i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1092  if (i < 0) {
1093  if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1094  if (avio_seek(pb, 0, SEEK_SET) < 0)
1095  return -1;
1096  } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1097  if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1098  return -1;
1099  }
1100  if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1101  return AVERROR(ERANGE);
1102  return 0;
1103  }
1104  if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1105  return -1;
1106  wtv->pts = wtv->index_entries[i].timestamp;
1107  if (wtv->epoch != AV_NOPTS_VALUE)
1108  wtv->pts += wtv->epoch;
1109  wtv->last_valid_pts = wtv->pts;
1110  return 0;
1111 }
1112 
1114 {
1115  WtvContext *wtv = s->priv_data;
1116  av_freep(&wtv->index_entries);
1117  wtvfile_close(wtv->pb);
1118  return 0;
1119 }
1120 
1122  .name = "wtv",
1123  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1124  .priv_data_size = sizeof(WtvContext),
1128  .read_seek = read_seek,
1130  .flags = AVFMT_SHOW_IDS,
1131 };
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
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
#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:309
#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:101
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3002
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:102
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:4549
const char * g
Definition: vf_curves.c:112
int64_t position
Definition: wtvdec.c:58
int64_t pos
Definition: avformat.h:818
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:3969
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:230
unsigned char * buffer
Start of the buffer.
Definition: avio.h:208
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
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:847
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:304
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:215
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
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:1954
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1379
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:480
const AVCodecGuid ff_codec_wav_guids[]
Definition: riff.c:546
Format I/O context.
Definition: avformat.h:1330
static const ff_asf_guid mediatype_mpeg2_sections
Definition: wtvdec.c:357
#define PRI_PRETTY_GUID
Definition: wtvdec.c:40
static int read_probe(AVProbeData *p)
Definition: wtvdec.c:374
const ff_asf_guid ff_data_guid
Definition: wtv_common.c:31
static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
Open file.
Definition: wtvdec.c:152
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:1054
#define av_malloc(s)
#define FF_MEDIASUBTYPE_BASE_GUID
Definition: riff.h:108
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:1283
mode
Definition: f_perms.c:27
enum AVStreamParseType need_parsing
Definition: avformat.h:1068
int id
Format-specific stream ID.
Definition: avformat.h:888
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:4182
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:1398
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:289
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
const ff_asf_guid ff_sync_guid
Definition: wtv_common.c:37
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4071
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:604
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:88
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3998
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1632
static int read_close(AVFormatContext *s)
Definition: wtvdec.c:1113
#define AVINDEX_KEYFRAME
Definition: avformat.h:825
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:126
int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize)
Read BITMAPINFOHEADER structure and set AVStream codec width, height and bits_per_encoded_sample fiel...
Definition: riffdec.c:208
#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:1546
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:1121
AVIOContext * pb_filesystem
file system (AVFormatContext->pb)
Definition: wtvdec.c:51
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:726
#define AVERROR(e)
Definition: error.h:43
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:819
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:517
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:3965
GLsizei GLsizei * length
Definition: opengl_enc.c:115
int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riffdec.c:32
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
GLsizei count
Definition: opengl_enc.c:109
#define FFMAX(a, b)
Definition: common.h:94
const uint8_t ff_timeline_table_0_entries_Events_le16[62]
Definition: wtv_common.c:52
int depth
Definition: v4l.c:62
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
#define LEN_PRETTY_GUID
Definition: wtvdec.c:44
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1606
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3987
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:595
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:463
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1386
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:4633
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
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
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
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:684
AVDictionary * metadata
Definition: avformat.h:950
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:856
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
Definition: wtvdec.c:349
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:848
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:89
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:1886
AVIOContext * pb
I/O context.
Definition: avformat.h:1372
#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:690
static const ff_asf_guid mediasubtype_teletext
Definition: wtvdec.c:367
GLint GLenum type
Definition: opengl_enc.c:105
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
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:2379
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:228
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
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:1073
static int flags
Definition: cpu.c:47
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:1612
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:935
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:473
full parsing and repack
Definition: avformat.h:808
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:710
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:191
#define FF_PRI_GUID
Definition: riff.h:98
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:939
#define AVSEEK_SIZE
ORing this as the "whence" parameter to a seek function causes it to return the filesize without seek...
Definition: avio.h:485
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:1358
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:4011
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:2381
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3983
int channels
Audio only.
Definition: avcodec.h:4075
static const ff_asf_guid EVENTID_TeletextSpanningEvent
Definition: wtvdec.c:347
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:662
AVCodecParameters * codecpar
Definition: avformat.h:1233
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3973
const ff_asf_guid ff_stream1_guid
Definition: wtv_common.c:35
int stream_index
Definition: avcodec.h:1602
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:113
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1577
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:734
#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:1593
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:968
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242
GLuint buffer
Definition: opengl_enc.c:102
AVIndexEntry * index_entries
Definition: wtvdec.c:327
const char * name
Definition: opengl_enc.c:103