FFmpeg  4.4
asfdec_o.c
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1 /*
2  * Microsoft Advanced Streaming Format demuxer
3  * Copyright (c) 2014 Alexandra Hájková
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 #include "libavutil/attributes.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/bswap.h"
25 #include "libavutil/common.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
31 
32 #include "avformat.h"
33 #include "avio_internal.h"
34 #include "avlanguage.h"
35 #include "id3v2.h"
36 #include "internal.h"
37 #include "riff.h"
38 #include "asf.h"
39 #include "asfcrypt.h"
40 
41 #define ASF_BOOL 0x2
42 #define ASF_WORD 0x5
43 #define ASF_GUID 0x6
44 #define ASF_DWORD 0x3
45 #define ASF_QWORD 0x4
46 #define ASF_UNICODE 0x0
47 #define ASF_FLAG_BROADCAST 0x1
48 #define ASF_BYTE_ARRAY 0x1
49 #define ASF_TYPE_AUDIO 0x2
50 #define ASF_TYPE_VIDEO 0x1
51 #define ASF_STREAM_NUM 0x7F
52 #define ASF_MAX_STREAMS 128
53 #define BMP_HEADER_SIZE 40
54 #define ASF_NUM_OF_PAYLOADS 0x3F
55 #define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
56 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
57 
58 typedef struct GUIDParseTable {
59  const char *name;
64 
65 typedef struct ASFPacket {
67  int64_t dts;
68  uint32_t frame_num; // ASF payloads with the same number are parts of the same frame
69  int flags;
70  int data_size;
71  int duration;
72  int size_left;
74 } ASFPacket;
75 
76 typedef struct ASFStream {
77  uint8_t stream_index; // from packet header
78  int index; // stream index in AVFormatContext, set in asf_read_stream_properties
79  int type;
80  int indexed; // added index entries from the Simple Index Object or not
81  int8_t span; // for deinterleaving
82  uint16_t virtual_pkt_len;
84  int16_t lang_idx;
86 } ASFStream;
87 
88 typedef struct ASFStreamData{
89  char langs[32];
90  AVDictionary *asf_met; // for storing per-stream metadata
93 
94 typedef struct ASFContext {
96  int is_simple_index; // is simple index present or not 1/0
97  int is_header;
98 
99  uint64_t preroll;
100  uint64_t nb_packets; // ASF packets
101  uint32_t packet_size;
102  int64_t send_time;
103  int duration;
104 
105  uint32_t b_flags; // flags with broadcast flag
106  uint32_t prop_flags; // file properties object flags
107 
108  uint64_t data_size; // data object size
109  uint64_t unknown_size; // size of the unknown object
110 
111  int64_t offset; // offset of the current object
112 
113  int64_t data_offset;
114  int64_t first_packet_offset; // packet offset
115  int64_t unknown_offset; // for top level header objects or subobjects without specified behavior
116 
117  // ASF file must not contain more than 128 streams according to the specification
121 
122  int stream_index; // from packet header, for the subpayload case
123 
124  // packet parameters
125  uint64_t sub_header_offset; // offset of subpayload header
126  int64_t sub_dts;
127  uint8_t dts_delta; // for subpayloads
128  uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0
129  int64_t packet_offset; // offset of the current packet inside Data Object
130  uint32_t pad_len; // padding after payload
131  uint32_t rep_data_len;
132 
133  // packet state
134  uint64_t sub_left; // subpayloads left or not
135  unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet
136  uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload
137  uint64_t nb_mult_left; // multiple payloads left
139  enum {
144  } state;
145 } ASFContext;
146 
147 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size);
148 static const GUIDParseTable *find_guid(ff_asf_guid guid);
149 
150 static int asf_probe(const AVProbeData *pd)
151 {
152  /* check file header */
153  if (!ff_guidcmp(pd->buf, &ff_asf_header))
154  return AVPROBE_SCORE_MAX/2;
155  else
156  return 0;
157 }
158 
159 static void swap_guid(ff_asf_guid guid)
160 {
161  FFSWAP(unsigned char, guid[0], guid[3]);
162  FFSWAP(unsigned char, guid[1], guid[2]);
163  FFSWAP(unsigned char, guid[4], guid[5]);
164  FFSWAP(unsigned char, guid[6], guid[7]);
165 }
166 
167 static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
168 {
169  if (size < INT64_MAX - offset && avio_tell(pb) != offset + size)
170  avio_seek(pb, offset + size, SEEK_SET);
171 }
172 
174 {
175  ASFContext *asf = s->priv_data;
176  AVIOContext *pb = s->pb;
177  uint64_t size = avio_rl64(pb);
178  int ret;
179 
180  if (size > INT64_MAX)
181  return AVERROR_INVALIDDATA;
182 
183  if (asf->is_header)
184  asf->unknown_size = size;
185  asf->is_header = 0;
186  if (!g->is_subobject) {
187  if (!(ret = strcmp(g->name, "Header Extension")))
188  avio_skip(pb, 22); // skip reserved fields and Data Size
189  if ((ret = detect_unknown_subobject(s, asf->unknown_offset,
190  asf->unknown_size)) < 0)
191  return ret;
192  } else {
193  if (size < 24) {
194  av_log(s, AV_LOG_ERROR, "Too small size %"PRIu64" (< 24).\n", size);
195  return AVERROR_INVALIDDATA;
196  }
197  avio_skip(pb, size - 24);
198  }
199 
200  return 0;
201 }
202 
203 static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
204 {
205  char *q = buf;
206  int ret = 0;
207  if (buflen <= 0)
208  return AVERROR(EINVAL);
209  while (ret + 1 < maxlen) {
210  uint8_t tmp;
211  uint32_t ch;
212  GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;);
213  PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)
214  }
215  *q = 0;
216 
217  return ret;
218 }
219 
221 {
222  ASFContext *asf = s->priv_data;
223  AVIOContext *pb = s->pb;
224  uint64_t size = avio_rl64(pb);
225  int i, nb_markers, ret;
226  size_t len;
227  char name[1024];
228 
229  avio_skip(pb, 8);
230  avio_skip(pb, 8); // skip reserved GUID
231  nb_markers = avio_rl32(pb);
232  avio_skip(pb, 2); // skip reserved field
233  len = avio_rl16(pb);
234  for (i = 0; i < len; i++)
235  avio_skip(pb, 1);
236 
237  for (i = 0; i < nb_markers; i++) {
238  int64_t pts;
239 
240  avio_skip(pb, 8);
241  pts = avio_rl64(pb);
242  pts -= asf->preroll * 10000;
243  avio_skip(pb, 2); // entry length
244  avio_skip(pb, 4); // send time
245  avio_skip(pb, 4); // flags
246  len = avio_rl32(pb);
247 
248  if (avio_feof(pb))
249  return AVERROR_INVALIDDATA;
250 
251  if ((ret = avio_get_str16le(pb, len, name,
252  sizeof(name))) < len)
253  avio_skip(pb, len - ret);
254  avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
256  }
257  align_position(pb, asf->offset, size);
258 
259  return 0;
260 }
261 
262 static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
263  unsigned char *ch, uint16_t buflen)
264 {
265  AVIOContext *pb = s->pb;
266 
267  avio_get_str16le(pb, len, ch, buflen);
268  if (ch[0]) {
269  if (av_dict_set(&s->metadata, title, ch, 0) < 0)
270  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
271  }
272 
273  return 0;
274 }
275 
277  uint16_t val_len, int type, AVDictionary **met)
278 {
279  int ret;
280  uint8_t *value;
281  uint16_t buflen = 2 * val_len + 1;
282  AVIOContext *pb = s->pb;
283 
284  value = av_malloc(buflen);
285  if (!value)
286  return AVERROR(ENOMEM);
287  if (type == ASF_UNICODE) {
288  // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
289  if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
290  goto failed;
291  if (av_dict_set(met, name, value, 0) < 0)
292  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
293  } else {
294  char buf[256];
295  if (val_len > sizeof(buf)) {
296  ret = AVERROR_INVALIDDATA;
297  goto failed;
298  }
299  if ((ret = avio_read(pb, value, val_len)) < 0)
300  goto failed;
301  if (ret < 2 * val_len)
302  value[ret] = '\0';
303  else
304  value[2 * val_len - 1] = '\0';
305  snprintf(buf, sizeof(buf), "%s", value);
306  if (av_dict_set(met, name, buf, 0) < 0)
307  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
308  }
309  av_freep(&value);
310 
311  return 0;
312 
313 failed:
314  av_freep(&value);
315  return ret;
316 }
317 static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
318 {
319 
320  switch (type) {
321  case ASF_BOOL:
322  *value = avio_rl16(pb);
323  break;
324  case ASF_DWORD:
325  *value = avio_rl32(pb);
326  break;
327  case ASF_QWORD:
328  *value = avio_rl64(pb);
329  break;
330  case ASF_WORD:
331  *value = avio_rl16(pb);
332  break;
333  default:
334  return AVERROR_INVALIDDATA;
335  }
336 
337  return 0;
338 }
339 
341  int type, AVDictionary **met)
342 {
343  AVIOContext *pb = s->pb;
344  uint64_t value;
345  char buf[32];
346  int ret;
347 
348  ret = asf_read_generic_value(pb, type, &value);
349  if (ret < 0)
350  return ret;
351 
352  snprintf(buf, sizeof(buf), "%"PRIu64, value);
353  if (av_dict_set(met, name, buf, 0) < 0)
354  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
355 
356  return 0;
357 }
358 
359 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
360  * but in reality this is only loosely similar */
362 {
363  AVPacket pkt = { 0 };
364  const CodecMime *mime = ff_id3v2_mime_tags;
365  enum AVCodecID id = AV_CODEC_ID_NONE;
366  char mimetype[64];
367  uint8_t *desc = NULL;
368  AVStream *st = NULL;
369  int ret, type, picsize, desc_len;
370 
371  /* type + picsize + mime + desc */
372  if (len < 1 + 4 + 2 + 2) {
373  av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
374  return AVERROR_INVALIDDATA;
375  }
376 
377  /* picture type */
378  type = avio_r8(s->pb);
379  len--;
381  av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
382  type = 0;
383  }
384 
385  /* picture data size */
386  picsize = avio_rl32(s->pb);
387  len -= 4;
388 
389  /* picture MIME type */
390  len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
391  while (mime->id != AV_CODEC_ID_NONE) {
392  if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
393  id = mime->id;
394  break;
395  }
396  mime++;
397  }
398  if (id == AV_CODEC_ID_NONE) {
399  av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
400  mimetype);
401  return 0;
402  }
403 
404  if (picsize >= len) {
405  av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
406  picsize, len);
407  return AVERROR_INVALIDDATA;
408  }
409 
410  /* picture description */
411  desc_len = (len - picsize) * 2 + 1;
412  desc = av_malloc(desc_len);
413  if (!desc)
414  return AVERROR(ENOMEM);
415  len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
416 
417  ret = av_get_packet(s->pb, &pkt, picsize);
418  if (ret < 0)
419  goto fail;
420 
421  st = avformat_new_stream(s, NULL);
422  if (!st) {
423  ret = AVERROR(ENOMEM);
424  goto fail;
425  }
426 
429  st->codecpar->codec_id = id;
430  st->attached_pic = pkt;
431  st->attached_pic.stream_index = st->index;
433 
434  if (*desc) {
435  if (av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL) < 0)
436  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
437  } else
438  av_freep(&desc);
439 
440  if (av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0) < 0)
441  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
442 
443  return 0;
444 
445 fail:
446  av_freep(&desc);
448  return ret;
449 }
450 
451 static void get_id3_tag(AVFormatContext *s, int len)
452 {
453  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
454 
455  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
456  if (id3v2_extra_meta) {
457  ff_id3v2_parse_apic(s, id3v2_extra_meta);
458  ff_id3v2_parse_chapters(s, id3v2_extra_meta);
459  }
460  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
461 }
462 
463 static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
464  uint16_t val_len, uint16_t type, AVDictionary **met)
465 {
466  int ret;
467  ff_asf_guid guid;
468 
469  if (val_len) {
470  switch (type) {
471  case ASF_UNICODE:
472  asf_read_value(s, name, val_len, type, met);
473  break;
474  case ASF_BYTE_ARRAY:
475  if (!strcmp(name, "WM/Picture")) // handle cover art
476  asf_read_picture(s, val_len);
477  else if (!strcmp(name, "ID3")) // handle ID3 tag
478  get_id3_tag(s, val_len);
479  else
480  asf_read_value(s, name, val_len, type, met);
481  break;
482  case ASF_GUID:
483  ff_get_guid(s->pb, &guid);
484  break;
485  default:
486  if ((ret = asf_set_metadata(s, name, type, met)) < 0)
487  return ret;
488  break;
489  }
490  }
491 
492  return 0;
493 }
494 
496 {
497  ASFContext *asf = s->priv_data;
498  AVIOContext *pb = s->pb;
499  uint64_t size = avio_rl64(pb);
500  uint16_t nb_desc = avio_rl16(pb);
501  int i, ret;
502 
503  for (i = 0; i < nb_desc; i++) {
504  uint16_t name_len, type, val_len;
505  uint8_t *name = NULL;
506 
507  name_len = avio_rl16(pb);
508  if (!name_len)
509  return AVERROR_INVALIDDATA;
510  name = av_malloc(name_len);
511  if (!name)
512  return AVERROR(ENOMEM);
513  avio_get_str16le(pb, name_len, name,
514  name_len);
515  type = avio_rl16(pb);
516  // BOOL values are 16 bits long in the Metadata Object
517  // but 32 bits long in the Extended Content Description Object
518  if (type == ASF_BOOL)
519  type = ASF_DWORD;
520  val_len = avio_rl16(pb);
521 
522  ret = process_metadata(s, name, name_len, val_len, type, &s->metadata);
523  av_freep(&name);
524  if (ret < 0)
525  return ret;
526  }
527 
528  align_position(pb, asf->offset, size);
529  return 0;
530 }
531 
532 static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
533 {
534  AVStream *st = NULL;
535  ASFContext *asf = s->priv_data;
536  int i;
537 
538  for (i = 0; i < asf->nb_streams; i++) {
539  if (asf->asf_st[i]->stream_index == st_num) {
540  st = s->streams[asf->asf_st[i]->index];
541  break;
542  }
543  }
544 
545  return st;
546 }
547 
549 {
550  ASFContext *asf = s->priv_data;
551  AVIOContext *pb = s->pb;
552  uint64_t value = 0;
553  int ret;
554 
555  ret = asf_read_generic_value(pb, type, &value);
556  if (ret < 0)
557  return ret;
558 
559  if (st_num < ASF_MAX_STREAMS) {
560  if (!strcmp(name, "AspectRatioX"))
561  asf->asf_sd[st_num].aspect_ratio.num = value;
562  else
563  asf->asf_sd[st_num].aspect_ratio.den = value;
564  }
565  return 0;
566 }
567 
569 {
570  ASFContext *asf = s->priv_data;
571  AVIOContext *pb = s->pb;
572  uint64_t size = avio_rl64(pb);
573  uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
574  int i, ret;
575 
576  for (i = 0; i < nb_recs; i++) {
577  uint16_t name_len, buflen, type, val_len, st_num;
578  uint8_t *name = NULL;
579 
580  avio_skip(pb, 2); // skip reserved field
581  st_num = avio_rl16(pb);
582  name_len = avio_rl16(pb);
583  buflen = 2 * name_len + 1;
584  if (!name_len)
585  break;
586  type = avio_rl16(pb);
587  val_len = avio_rl32(pb);
588  name = av_malloc(buflen);
589  if (!name)
590  return AVERROR(ENOMEM);
591  avio_get_str16le(pb, name_len, name,
592  buflen);
593  if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
594  ret = asf_store_aspect_ratio(s, st_num, name, type);
595  if (ret < 0) {
596  av_freep(&name);
597  break;
598  }
599  } else {
600  if (st_num < ASF_MAX_STREAMS) {
601  if ((ret = process_metadata(s, name, name_len, val_len, type,
602  st_num ? &asf->asf_sd[st_num].asf_met
603  : &s->metadata)) < 0) {
604  av_freep(&name);
605  break;
606  }
607  }
608  }
609  av_freep(&name);
610  }
611 
612  align_position(pb, asf->offset, size);
613  return 0;
614 }
615 
617 {
618  ASFContext *asf = s->priv_data;
619  AVIOContext *pb = s->pb;
620  int i;
621  static const char *const titles[] =
622  { "Title", "Author", "Copyright", "Description", "Rate" };
623  uint16_t len[5], buflen[5] = { 0 };
624  uint8_t *ch;
625  uint64_t size = avio_rl64(pb);
626 
627  for (i = 0; i < 5; i++) {
628  len[i] = avio_rl16(pb);
629  // utf8 string should be <= 2 * utf16 string, extra byte for the terminator
630  buflen[i] = 2 * len[i] + 1;
631  }
632 
633  for (i = 0; i < 5; i++) {
634  ch = av_malloc(buflen[i]);
635  if (!ch)
636  return(AVERROR(ENOMEM));
637  asf_read_metadata(s, titles[i], len[i], ch, buflen[i]);
638  av_freep(&ch);
639  }
640  align_position(pb, asf->offset, size);
641 
642  return 0;
643 }
644 
646 {
647  ASFContext *asf = s->priv_data;
648  AVIOContext *pb = s->pb;
649  time_t creation_time;
650 
651  avio_rl64(pb); // read object size
652  avio_skip(pb, 16); // skip File ID
653  avio_skip(pb, 8); // skip File size
654  creation_time = avio_rl64(pb);
655  if (!(asf->b_flags & ASF_FLAG_BROADCAST)) {
656  struct tm tmbuf;
657  struct tm *tm;
658  char buf[64];
659 
660  // creation date is in 100 ns units from 1 Jan 1601, conversion to s
661  creation_time /= 10000000;
662  // there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970
663  creation_time -= 11644473600;
664  tm = gmtime_r(&creation_time, &tmbuf);
665  if (tm) {
666  if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
667  buf[0] = '\0';
668  } else
669  buf[0] = '\0';
670  if (buf[0]) {
671  if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0)
672  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
673  }
674  }
675  asf->nb_packets = avio_rl64(pb);
676  asf->duration = avio_rl64(pb) / 10000; // stream duration
677  avio_skip(pb, 8); // skip send duration
678  asf->preroll = avio_rl64(pb);
679  asf->duration -= asf->preroll;
680  asf->b_flags = avio_rl32(pb);
681  avio_skip(pb, 4); // skip minimal packet size
682  asf->packet_size = avio_rl32(pb);
683  avio_skip(pb, 4); // skip max_bitrate
684 
685  return 0;
686 }
687 
689 {
690  uint16_t size_asf; // ASF-specific Format Data size
691  uint32_t size_bmp; // BMP_HEADER-specific Format Data size
692  unsigned int tag;
693 
694  st->codecpar->width = avio_rl32(pb);
695  st->codecpar->height = avio_rl32(pb);
696  avio_skip(pb, 1); // skip reserved flags
697  size_asf = avio_rl16(pb);
698  tag = ff_get_bmp_header(pb, st, &size_bmp);
699  st->codecpar->codec_tag = tag;
701  size_bmp = FFMAX(size_asf, size_bmp);
702 
703  if (size_bmp > BMP_HEADER_SIZE &&
704  size_bmp < INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
705  int ret;
706  st->codecpar->extradata_size = size_bmp - BMP_HEADER_SIZE;
709  st->codecpar->extradata_size = 0;
710  return AVERROR(ENOMEM);
711  }
712  memset(st->codecpar->extradata + st->codecpar->extradata_size , 0,
714  if ((ret = avio_read(pb, st->codecpar->extradata,
715  st->codecpar->extradata_size)) < 0)
716  return ret;
717  }
718  return 0;
719 }
720 
722 {
723  ASFContext *asf = s->priv_data;
724  AVIOContext *pb = s->pb;
725  uint64_t size;
726  uint32_t err_data_len, ts_data_len; // type specific data length
727  uint16_t flags;
728  ff_asf_guid stream_type;
729  enum AVMediaType type;
730  int i, ret;
731  uint8_t stream_index;
732  AVStream *st;
733  ASFStream *asf_st;
734 
735  // ASF file must not contain more than 128 streams according to the specification
736  if (asf->nb_streams >= ASF_MAX_STREAMS)
737  return AVERROR_INVALIDDATA;
738 
739  size = avio_rl64(pb);
740  ff_get_guid(pb, &stream_type);
741  if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
743  else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
745  else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
747  else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
749  else if (!ff_guidcmp(&stream_type,
752  else
753  return AVERROR_INVALIDDATA;
754 
755  ff_get_guid(pb, &stream_type); // error correction type
756  avio_skip(pb, 8); // skip the time offset
757  ts_data_len = avio_rl32(pb);
758  err_data_len = avio_rl32(pb);
759  flags = avio_rl16(pb); // bit 15 - Encrypted Content
760 
761  stream_index = flags & ASF_STREAM_NUM;
762  for (i = 0; i < asf->nb_streams; i++)
763  if (stream_index == asf->asf_st[i]->stream_index) {
765  "Duplicate stream found, this stream will be ignored.\n");
766  align_position(pb, asf->offset, size);
767  return 0;
768  }
769 
770  st = avformat_new_stream(s, NULL);
771  if (!st)
772  return AVERROR(ENOMEM);
773  avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
774  st->codecpar->codec_type = type;
775  asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
776  if (!asf->asf_st[asf->nb_streams])
777  return AVERROR(ENOMEM);
778  asf_st = asf->asf_st[asf->nb_streams];
779  asf->nb_streams++;
780  asf_st->stream_index = stream_index;
781  asf_st->index = st->index;
782  asf_st->indexed = 0;
783  st->id = flags & ASF_STREAM_NUM;
784  asf_st->pkt.data_size = 0;
785  asf_st->pkt.avpkt = av_packet_alloc();
786  if (!asf_st->pkt.avpkt)
787  return AVERROR(ENOMEM);
788  avio_skip(pb, 4); // skip reserved field
789 
790  switch (type) {
791  case AVMEDIA_TYPE_AUDIO:
792  asf_st->type = AVMEDIA_TYPE_AUDIO;
793  if ((ret = ff_get_wav_header(s, pb, st->codecpar, ts_data_len, 0)) < 0)
794  return ret;
795  break;
796  case AVMEDIA_TYPE_VIDEO:
797  asf_st->type = AVMEDIA_TYPE_VIDEO;
798  if ((ret = parse_video_info(pb, st)) < 0)
799  return ret;
800  break;
801  default:
802  avio_skip(pb, ts_data_len);
803  break;
804  }
805 
806  if (err_data_len) {
807  if (type == AVMEDIA_TYPE_AUDIO) {
808  uint8_t span = avio_r8(pb);
809  if (span > 1) {
810  asf_st->span = span;
811  asf_st->virtual_pkt_len = avio_rl16(pb);
812  asf_st->virtual_chunk_len = avio_rl16(pb);
813  if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
814  return AVERROR_INVALIDDATA;
815  avio_skip(pb, err_data_len - 5);
816  } else
817  avio_skip(pb, err_data_len - 1);
818  } else
819  avio_skip(pb, err_data_len);
820  }
821 
822  align_position(pb, asf->offset, size);
823 
824  return 0;
825 }
826 
827 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
828 {
829  // language abbr should contain at least 2 chars
830  if (rfc1766 && strlen(rfc1766) > 1) {
831  const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
832  const char *iso6392 = ff_convert_lang_to(primary_tag,
834  if (iso6392)
835  if (av_dict_set(met, "language", iso6392, 0) < 0)
836  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
837  }
838 }
839 
841 {
842  ASFContext *asf = s->priv_data;
843  AVIOContext *pb = s->pb;
844  AVStream *st = NULL;
845  ff_asf_guid guid;
846  uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
847  int i, ret;
848  uint32_t bitrate;
849  uint64_t start_time, end_time, time_per_frame;
850  uint64_t size = avio_rl64(pb);
851 
852  start_time = avio_rl64(pb);
853  end_time = avio_rl64(pb);
854  bitrate = avio_rl32(pb);
855  avio_skip(pb, 28); // skip some unused values
856  st_num = avio_rl16(pb);
857  st_num &= ASF_STREAM_NUM;
858  lang_idx = avio_rl16(pb); // Stream Language ID Index
859  if (lang_idx >= ASF_MAX_STREAMS)
860  return AVERROR_INVALIDDATA;
861  for (i = 0; i < asf->nb_streams; i++) {
862  if (st_num == asf->asf_st[i]->stream_index) {
863  st = s->streams[asf->asf_st[i]->index];
864  asf->asf_st[i]->lang_idx = lang_idx;
865  break;
866  }
867  }
868  time_per_frame = avio_rl64(pb); // average time per frame
869  if (st) {
870  st->start_time = start_time;
871  st->duration = end_time - start_time;
872  st->codecpar->bit_rate = bitrate;
873  st->avg_frame_rate.num = 10000000;
874  st->avg_frame_rate.den = time_per_frame;
875  }
876  nb_st_name = avio_rl16(pb);
877  nb_pay_exts = avio_rl16(pb);
878  for (i = 0; i < nb_st_name; i++) {
879  uint16_t len;
880 
881  avio_rl16(pb); // Language ID Index
882  len = avio_rl16(pb);
883  avio_skip(pb, len);
884  }
885 
886  for (i = 0; i < nb_pay_exts; i++) {
887  uint32_t len;
888  avio_skip(pb, 16); // Extension System ID
889  avio_skip(pb, 2); // Extension Data Size
890  len = avio_rl32(pb);
891  avio_skip(pb, len);
892  }
893 
894  if ((ret = ff_get_guid(pb, &guid)) < 0) {
895  align_position(pb, asf->offset, size);
896 
897  return 0;
898  }
899 
900  g = find_guid(guid);
901  if (g && !(strcmp(g->name, "Stream Properties"))) {
902  if ((ret = g->read_object(s, g)) < 0)
903  return ret;
904  }
905 
906  align_position(pb, asf->offset, size);
907  return 0;
908 }
909 
911 {
912  ASFContext *asf = s->priv_data;
913  AVIOContext *pb = s->pb;
914  int i, ret;
915  uint64_t size = avio_rl64(pb);
916  uint16_t nb_langs = avio_rl16(pb);
917 
918  if (nb_langs < ASF_MAX_STREAMS) {
919  for (i = 0; i < nb_langs; i++) {
920  size_t len;
921  len = avio_r8(pb);
922  if (!len)
923  len = 6;
924  if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
925  sizeof(asf->asf_sd[i].langs))) < 0) {
926  return ret;
927  }
928  }
929  }
930 
931  align_position(pb, asf->offset, size);
932  return 0;
933 }
934 
935 // returns data object offset when reading this object for the first time
937 {
938  ASFContext *asf = s->priv_data;
939  AVIOContext *pb = s->pb;
940  uint64_t size = asf->data_size = avio_rl64(pb);
941  int i;
942 
943  if (!asf->data_reached) {
944  asf->data_reached = 1;
945  asf->data_offset = asf->offset;
946  }
947 
948  for (i = 0; i < asf->nb_streams; i++) {
949  if (!(asf->b_flags & ASF_FLAG_BROADCAST))
950  s->streams[i]->duration = asf->duration;
951  }
952  asf->nb_mult_left = 0;
953  asf->sub_left = 0;
954  asf->state = PARSE_PACKET_HEADER;
955  asf->return_subpayload = 0;
956  asf->packet_size_internal = 0;
957  avio_skip(pb, 16); // skip File ID
958  size = avio_rl64(pb); // Total Data Packets
959  if (size != asf->nb_packets)
961  "Number of Packets from File Properties Object is not equal to Total"
962  "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
963  size, asf->nb_packets);
964  avio_skip(pb, 2); // skip reserved field
965  asf->first_packet_offset = avio_tell(pb);
966  if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(asf->b_flags & ASF_FLAG_BROADCAST))
967  align_position(pb, asf->offset, asf->data_size);
968 
969  return 0;
970 }
971 
973 {
974  ASFContext *asf = s->priv_data;
975  AVIOContext *pb = s->pb;
976  AVStream *st = NULL;
977  uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
978  uint32_t pkt_num, nb_entries;
979  int32_t prev_pkt_num = -1;
980  int i;
981  int64_t offset;
982  uint64_t size = avio_rl64(pb);
983 
984  // simple index objects should be ordered by stream number, this loop tries to find
985  // the first not indexed video stream
986  for (i = 0; i < asf->nb_streams; i++) {
987  if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
988  asf->asf_st[i]->indexed = 1;
989  st = s->streams[asf->asf_st[i]->index];
990  break;
991  }
992  }
993  if (!st) {
994  avio_skip(pb, size - 24); // if there's no video stream, skip index object
995  return 0;
996  }
997  avio_skip(pb, 16); // skip File ID
998  interval = avio_rl64(pb);
999  avio_skip(pb, 4);
1000  nb_entries = avio_rl32(pb);
1001  for (i = 0; i < nb_entries; i++) {
1002  pkt_num = avio_rl32(pb);
1003  offset = avio_skip(pb, 2);
1004  if (offset < 0) {
1005  av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
1006  return offset;
1007  }
1008  if (prev_pkt_num != pkt_num) {
1010  pkt_num, av_rescale(interval, i, 10000),
1011  asf->packet_size, 0, AVINDEX_KEYFRAME);
1012  prev_pkt_num = pkt_num;
1013  }
1014  }
1015  asf->is_simple_index = 1;
1016  align_position(pb, asf->offset, size);
1017 
1018  return 0;
1019 }
1020 
1021 static const GUIDParseTable gdef[] = {
1022  { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
1023  { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
1024  { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
1025  { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
1026  { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
1027  { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
1028  { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
1029  { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
1030  { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1031  { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
1032  { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1033  { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
1034  { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
1035  { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1036  { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
1037  { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1038  { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
1039  { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
1040  { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1041  { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
1042  { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1043  { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1044  { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
1045  { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1046  { "Extended Stream Properties", { 0x14, 0xE6, 0xA5, 0xCB, 0xC6, 0x72, 0x43, 0x32, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A }, asf_read_ext_stream_properties, 1 },
1047  { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
1048  { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
1049  { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
1050  { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1051  { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
1052  { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
1053  { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
1054  { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1055  { "Content Encryption System Windows Media DRM Network Devices",
1056  { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
1057  { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1058  { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1059  { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1060  { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1061  { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1062  { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
1063  { "Payload Extension System File Name", { 0xE1, 0x65, 0xEC, 0x0E, 0x19, 0xED, 0x45, 0xD7, 0xB4, 0xA7, 0x25, 0xCB, 0xD1, 0xE2, 0x8E, 0x9B }, asf_read_unknown, 1 },
1064  { "Payload Extension System Content Type", { 0xD5, 0x90, 0xDC, 0x20, 0x07, 0xBC, 0x43, 0x6C, 0x9C, 0xF7, 0xF3, 0xBB, 0xFB, 0xF1, 0xA4, 0xDC }, asf_read_unknown, 1 },
1065  { "Payload Extension System Pixel Aspect Ratio", { 0x1, 0x1E, 0xE5, 0x54, 0xF9, 0xEA, 0x4B, 0xC8, 0x82, 0x1A, 0x37, 0x6B, 0x74, 0xE4, 0xC4, 0xB8 }, asf_read_unknown, 1 },
1066  { "Payload Extension System Sample Duration", { 0xC6, 0xBD, 0x94, 0x50, 0x86, 0x7F, 0x49, 0x07, 0x83, 0xA3, 0xC7, 0x79, 0x21, 0xB7, 0x33, 0xAD }, asf_read_unknown, 1 },
1067  { "Payload Extension System Encryption Sample ID", { 0x66, 0x98, 0xB8, 0x4E, 0x0A, 0xFA, 0x43, 0x30, 0xAE, 0xB2, 0x1C, 0x0A, 0x98, 0xD7, 0xA4, 0x4D }, asf_read_unknown, 1 },
1068  { "Payload Extension System Degradable JPEG", { 0x00, 0xE1, 0xAF, 0x06, 0x7B, 0xEC, 0x11, 0xD1, 0xA5, 0x82, 0x00, 0xC0, 0x4F, 0xC2, 0x9C, 0xFB }, asf_read_unknown, 1 },
1069 };
1070 
1071 #define READ_LEN(flag, name, len) \
1072  do { \
1073  if ((flag) == name ## IS_BYTE) \
1074  len = avio_r8(pb); \
1075  else if ((flag) == name ## IS_WORD) \
1076  len = avio_rl16(pb); \
1077  else if ((flag) == name ## IS_DWORD) \
1078  len = avio_rl32(pb); \
1079  else \
1080  len = 0; \
1081  } while(0)
1082 
1083 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
1084 {
1085  ASFContext *asf = s->priv_data;
1086  AVIOContext *pb = s->pb;
1087  uint8_t sub_len;
1088  int ret, i;
1089 
1090  if (is_header) {
1091  asf->dts_delta = avio_r8(pb);
1092  if (asf->nb_mult_left) {
1093  asf->mult_sub_len = avio_rl16(pb); // total
1094  }
1095  asf->sub_header_offset = avio_tell(pb);
1096  asf->nb_sub = 0;
1097  asf->sub_left = 1;
1098  }
1099  sub_len = avio_r8(pb);
1100  if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
1101  return ret;
1102  for (i = 0; i < asf->nb_streams; i++) {
1103  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1104  pkt->stream_index = asf->asf_st[i]->index;
1105  break;
1106  }
1107  }
1108  asf->return_subpayload = 1;
1109  if (!sub_len)
1110  asf->return_subpayload = 0;
1111 
1112  if (sub_len)
1113  asf->nb_sub++;
1114  pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1115  if (asf->nb_mult_left && (avio_tell(pb) >=
1116  (asf->sub_header_offset + asf->mult_sub_len))) {
1117  asf->sub_left = 0;
1118  asf->nb_mult_left--;
1119  }
1120  if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1121  asf->sub_left = 0;
1122  if (!asf->nb_mult_left) {
1123  avio_skip(pb, asf->pad_len);
1124  if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1125  if (!asf->packet_size)
1126  return AVERROR_INVALIDDATA;
1128  "Position %"PRId64" wrong, should be %"PRId64"\n",
1129  avio_tell(pb), asf->packet_offset + asf->packet_size);
1130  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1131  }
1132  }
1133  }
1134 
1135  return 0;
1136 }
1137 
1138 static void reset_packet(ASFPacket *asf_pkt)
1139 {
1140  asf_pkt->size_left = 0;
1141  asf_pkt->data_size = 0;
1142  asf_pkt->duration = 0;
1143  asf_pkt->flags = 0;
1144  asf_pkt->dts = 0;
1145  av_packet_unref(asf_pkt->avpkt);
1146 }
1147 
1149 {
1150  ASFContext *asf = s->priv_data;
1151  AVIOContext *pb = s->pb;
1152  int ret, data_size;
1153 
1154  if (!asf_pkt->data_size) {
1155  data_size = avio_rl32(pb); // read media object size
1156  if (data_size <= 0)
1157  return AVERROR_INVALIDDATA;
1158  if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1159  return ret;
1160  asf_pkt->data_size = asf_pkt->size_left = data_size;
1161  } else
1162  avio_skip(pb, 4); // reading of media object size is already done
1163  asf_pkt->dts = avio_rl32(pb); // read presentation time
1164  if (asf->rep_data_len >= 8)
1165  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1166 
1167  return 0;
1168 }
1169 
1171  ASFPacket *asf_pkt)
1172 {
1173  ASFContext *asf = s->priv_data;
1174  AVIOContext *pb = s->pb;
1175  uint16_t pay_len;
1176  unsigned char *p;
1177  int ret;
1178  int skip = 0;
1179 
1180  // if replicated length is 1, subpayloads are present
1181  if (asf->rep_data_len == 1) {
1182  asf->sub_left = 1;
1183  asf->state = READ_MULTI_SUB;
1184  pkt->flags = asf_pkt->flags;
1185  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1186  return ret;
1187  } else {
1188  if (asf->rep_data_len)
1189  if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1190  return ret;
1191  pay_len = avio_rl16(pb); // payload length should be WORD
1192  if (pay_len > asf->packet_size) {
1194  "Error: invalid data packet size, pay_len %"PRIu16", "
1195  "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1196  pay_len, asf->packet_size, avio_tell(pb));
1197  return AVERROR_INVALIDDATA;
1198  }
1199  p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1200  if (pay_len > asf_pkt->size_left) {
1202  "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1203  pay_len, asf_pkt->size_left);
1204  skip = pay_len - asf_pkt->size_left;
1205  pay_len = asf_pkt->size_left;
1206  }
1207  if (asf_pkt->size_left <= 0)
1208  return AVERROR_INVALIDDATA;
1209  if ((ret = avio_read(pb, p, pay_len)) < 0)
1210  return ret;
1211  if (s->key && s->keylen == 20)
1212  ff_asfcrypt_dec(s->key, p, ret);
1213  avio_skip(pb, skip);
1214  asf_pkt->size_left -= pay_len;
1215  asf->nb_mult_left--;
1216  }
1217 
1218  return 0;
1219 }
1220 
1222 {
1223  ASFContext *asf = s->priv_data;
1224  AVIOContext *pb = s->pb;
1225  int64_t offset;
1226  uint64_t size;
1227  unsigned char *p;
1228  int ret, data_size;
1229 
1230  if (!asf_pkt->data_size) {
1231  data_size = avio_rl32(pb); // read media object size
1232  if (data_size <= 0)
1233  return AVERROR_EOF;
1234  if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1235  return ret;
1236  asf_pkt->data_size = asf_pkt->size_left = data_size;
1237  } else
1238  avio_skip(pb, 4); // skip media object size
1239  asf_pkt->dts = avio_rl32(pb); // read presentation time
1240  if (asf->rep_data_len >= 8)
1241  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1242  offset = avio_tell(pb);
1243 
1244  // size of the payload - size of the packet without header and padding
1245  if (asf->packet_size_internal)
1246  size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1247  else
1248  size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1249  if (size > asf->packet_size) {
1251  "Error: invalid data packet size, offset %"PRId64".\n",
1252  avio_tell(pb));
1253  return AVERROR_INVALIDDATA;
1254  }
1255  p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1256  if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1257  return AVERROR_INVALIDDATA;
1258  if (asf_pkt->size_left > size)
1259  asf_pkt->size_left -= size;
1260  else
1261  asf_pkt->size_left = 0;
1262  if ((ret = avio_read(pb, p, size)) < 0)
1263  return ret;
1264  if (s->key && s->keylen == 20)
1265  ff_asfcrypt_dec(s->key, p, ret);
1266  if (asf->packet_size_internal)
1267  avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1268  avio_skip(pb, asf->pad_len); // skip padding
1269 
1270  return 0;
1271 }
1272 
1274 {
1275  ASFContext *asf = s->priv_data;
1276  AVIOContext *pb = s->pb;
1277  int ret, i;
1278  ASFPacket *asf_pkt = NULL;
1279 
1280  if (!asf->sub_left) {
1281  uint32_t off_len, media_len;
1282  uint8_t stream_num;
1283 
1284  stream_num = avio_r8(pb);
1285  asf->stream_index = stream_num & ASF_STREAM_NUM;
1286  for (i = 0; i < asf->nb_streams; i++) {
1287  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1288  asf_pkt = &asf->asf_st[i]->pkt;
1289  asf_pkt->stream_index = asf->asf_st[i]->index;
1290  break;
1291  }
1292  }
1293  if (!asf_pkt) {
1294  if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1295  if (!asf->packet_size) {
1296  av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1297  return AVERROR_INVALIDDATA;
1298  }
1299  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1300  av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1301  asf->stream_index);
1302  return AVERROR(EAGAIN);
1303  } else
1304  return AVERROR_INVALIDDATA;
1305  }
1306 
1307  if (stream_num >> 7)
1308  asf_pkt->flags |= AV_PKT_FLAG_KEY;
1310  ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1312  ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1314  ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1315  if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1316  av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1317  reset_packet(asf_pkt);
1318  }
1319  asf_pkt->frame_num = media_len;
1320  asf->sub_dts = off_len;
1321  if (asf->nb_mult_left) {
1322  if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1323  return ret;
1324  } else if (asf->rep_data_len == 1) {
1325  asf->sub_left = 1;
1326  asf->state = READ_SINGLE;
1327  pkt->flags = asf_pkt->flags;
1328  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1329  return ret;
1330  } else {
1331  if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1332  return ret;
1333  }
1334  } else {
1335  for (i = 0; i <= asf->nb_streams; i++) {
1336  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1337  asf_pkt = &asf->asf_st[i]->pkt;
1338  break;
1339  }
1340  }
1341  if (!asf_pkt)
1342  return AVERROR_INVALIDDATA;
1343  pkt->flags = asf_pkt->flags;
1344  pkt->dts = asf_pkt->dts;
1345  pkt->stream_index = asf->asf_st[i]->index;
1346  if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1347  return ret;
1348  }
1349 
1350  return 0;
1351 }
1352 
1354 {
1355  ASFContext *asf = s->priv_data;
1356  AVIOContext *pb = s->pb;
1357  uint64_t size;
1358  uint32_t av_unused seq;
1359  unsigned char error_flags, len_flags, pay_flags;
1360 
1361  asf->packet_offset = avio_tell(pb);
1362  error_flags = avio_r8(pb); // read Error Correction Flags
1363  if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1364  if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1366  avio_skip(pb, size);
1367  }
1368  len_flags = avio_r8(pb);
1369  } else
1370  len_flags = error_flags;
1371  asf->prop_flags = avio_r8(pb);
1373  ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1375  ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1377  ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1378  asf->send_time = avio_rl32(pb); // send time
1379  avio_skip(pb, 2); // skip duration
1380  if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1381  pay_flags = avio_r8(pb);
1382  asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1383  }
1384 
1385  return 0;
1386 }
1387 
1388 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1389 {
1390  ASFContext *asf = s->priv_data;
1391  ASFStream *asf_st = asf->asf_st[st_num];
1392  unsigned char *p = asf_pkt->avpkt->data;
1393  uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1394  uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1395  int nchunks = pkt_len / chunk_len;
1396  uint8_t *data;
1397  int pos = 0, j, l, ret;
1398 
1399 
1401  if (!data)
1402  return AVERROR(ENOMEM);
1403  memset(data + asf_pkt->data_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1404 
1405  while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1406  if (pos >= asf_pkt->data_size) {
1407  break;
1408  }
1409  for (l = 0; l < pkt_len; l++) {
1410  if (pos >= asf_pkt->data_size) {
1411  break;
1412  }
1413  for (j = 0; j < asf_st->span; j++) {
1414  if ((pos + chunk_len) >= asf_pkt->data_size)
1415  break;
1416  memcpy(data + pos,
1417  p + (j * nchunks + l) * chunk_len,
1418  chunk_len);
1419  pos += chunk_len;
1420  }
1421  }
1422  p += asf_st->span * pkt_len;
1423  if (p > asf_pkt->avpkt->data + asf_pkt->data_size)
1424  break;
1425  }
1426  av_packet_unref(asf_pkt->avpkt);
1427  ret = av_packet_from_data(asf_pkt->avpkt, data, asf_pkt->data_size);
1428  if (ret < 0)
1429  av_free(data);
1430 
1431  return ret;
1432 }
1433 
1435 {
1436  ASFContext *asf = s->priv_data;
1437  AVIOContext *pb = s->pb;
1438  int ret, i;
1439 
1440  if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1441  !(asf->b_flags & ASF_FLAG_BROADCAST))
1442  return AVERROR_EOF;
1443  while (!pb->eof_reached) {
1444  if (asf->state == PARSE_PACKET_HEADER) {
1446  if (pb->eof_reached)
1447  break;
1448  if (!asf->nb_mult_left)
1449  asf->state = READ_SINGLE;
1450  else
1451  asf->state = READ_MULTI;
1452  }
1453  ret = asf_read_payload(s, pkt);
1454  if (ret == AVERROR(EAGAIN)) {
1455  asf->state = PARSE_PACKET_HEADER;
1456  continue;
1457  }
1458  else if (ret < 0)
1459  return ret;
1460 
1461  switch (asf->state) {
1462  case READ_SINGLE:
1463  if (!asf->sub_left)
1464  asf->state = PARSE_PACKET_HEADER;
1465  break;
1466  case READ_MULTI_SUB:
1467  if (!asf->sub_left && !asf->nb_mult_left) {
1468  asf->state = PARSE_PACKET_HEADER;
1469  if (!asf->return_subpayload &&
1470  (avio_tell(pb) <= asf->packet_offset +
1471  asf->packet_size - asf->pad_len))
1472  avio_skip(pb, asf->pad_len); // skip padding
1473  if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1474  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1475  } else if (!asf->sub_left)
1476  asf->state = READ_MULTI;
1477  break;
1478  case READ_MULTI:
1479  if (!asf->nb_mult_left) {
1480  asf->state = PARSE_PACKET_HEADER;
1481  if (!asf->return_subpayload &&
1482  (avio_tell(pb) <= asf->packet_offset +
1483  asf->packet_size - asf->pad_len))
1484  avio_skip(pb, asf->pad_len); // skip padding
1485  if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1486  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1487  }
1488  break;
1489  }
1490  if (asf->return_subpayload) {
1491  asf->return_subpayload = 0;
1492  return 0;
1493  }
1494  for (i = 0; i < asf->nb_streams; i++) {
1495  ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1496  if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1497  if (asf->asf_st[i]->span > 1 &&
1498  asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1499  if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1500  return ret;
1501  av_packet_move_ref(pkt, asf_pkt->avpkt);
1502  pkt->stream_index = asf->asf_st[i]->index;
1503  pkt->flags = asf_pkt->flags;
1504  pkt->dts = asf_pkt->dts - asf->preroll;
1505  asf_pkt->data_size = 0;
1506  asf_pkt->frame_num = 0;
1507  return 0;
1508  }
1509  }
1510  }
1511 
1512  if (pb->eof_reached)
1513  return AVERROR_EOF;
1514 
1515  return 0;
1516 }
1517 
1519 {
1520  ASFContext *asf = s->priv_data;
1521  int i;
1522 
1523  for (i = 0; i < ASF_MAX_STREAMS; i++) {
1524  av_dict_free(&asf->asf_sd[i].asf_met);
1525  if (i < asf->nb_streams) {
1526  av_packet_free(&asf->asf_st[i]->pkt.avpkt);
1527  av_freep(&asf->asf_st[i]);
1528  }
1529  }
1530 
1531  asf->nb_streams = 0;
1532  return 0;
1533 }
1534 
1536 {
1537  ASFContext *asf = s->priv_data;
1538  int i;
1539 
1540  asf->state = PARSE_PACKET_HEADER;
1541  asf->offset = 0;
1542  asf->return_subpayload = 0;
1543  asf->sub_left = 0;
1544  asf->sub_header_offset = 0;
1545  asf->packet_offset = asf->first_packet_offset;
1546  asf->pad_len = 0;
1547  asf->rep_data_len = 0;
1548  asf->dts_delta = 0;
1549  asf->mult_sub_len = 0;
1550  asf->nb_mult_left = 0;
1551  asf->nb_sub = 0;
1552  asf->prop_flags = 0;
1553  asf->sub_dts = 0;
1554  for (i = 0; i < asf->nb_streams; i++) {
1555  ASFPacket *pkt = &asf->asf_st[i]->pkt;
1556  reset_packet(pkt);
1557  }
1558 }
1559 
1560 /*
1561  * Find a timestamp for the requested position within the payload
1562  * where the pos (position) is the offset inside the Data Object.
1563  * When position is not on the packet boundary, asf_read_timestamp tries
1564  * to find the closest packet offset after this position. If this packet
1565  * is a key frame, this packet timestamp is read and an index entry is created
1566  * for the packet. If this packet belongs to the requested stream,
1567  * asf_read_timestamp upgrades pos to the packet beginning offset and
1568  * returns this packet's dts. So returned dts is the dts of the first key frame with
1569  * matching stream number after given position.
1570  */
1571 static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1572  int64_t *pos, int64_t pos_limit)
1573 {
1574  ASFContext *asf = s->priv_data;
1575  int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1577  int n;
1578 
1579  if (!pkt)
1580  return AVERROR(ENOMEM);
1581 
1582  data_end = asf->data_offset + asf->data_size;
1583 
1584  n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1585  asf->packet_size;
1586  n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1587  pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1588 
1589  avio_seek(s->pb, pkt_pos, SEEK_SET);
1590  pkt_offset = pkt_pos;
1591 
1593  while (avio_tell(s->pb) < data_end) {
1594 
1595  int i, ret, st_found;
1596 
1597  pkt_offset = avio_tell(s->pb);
1598  if ((ret = asf_read_packet(s, pkt)) < 0) {
1599  av_packet_free(&pkt);
1600  dts = AV_NOPTS_VALUE;
1601  return ret;
1602  }
1603  // ASFPacket may contain fragments of packets belonging to different streams,
1604  // pkt_offset is the offset of the first fragment within it.
1605  if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1606  pkt_pos += asf->packet_size;
1607  for (i = 0; i < asf->nb_streams; i++) {
1608  ASFStream *st = asf->asf_st[i];
1609 
1610  st_found = 0;
1611  if (pkt->flags & AV_PKT_FLAG_KEY) {
1612  dts = pkt->dts;
1613  if (dts) {
1614  av_add_index_entry(s->streams[pkt->stream_index], pkt_pos,
1615  dts, pkt->size, 0, AVINDEX_KEYFRAME);
1616  if (stream_index == st->index) {
1617  st_found = 1;
1618  break;
1619  }
1620  }
1621  }
1622  }
1623  if (st_found)
1624  break;
1626  }
1627  *pos = pkt_pos;
1628 
1629  av_packet_free(&pkt);
1630  return dts;
1631 }
1632 
1633 static int asf_read_seek(AVFormatContext *s, int stream_index,
1634  int64_t timestamp, int flags)
1635 {
1636  ASFContext *asf = s->priv_data;
1637  int idx, ret;
1638 
1639  if (s->streams[stream_index]->nb_index_entries && asf->is_simple_index) {
1640  idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
1641  if (idx < 0 || idx >= s->streams[stream_index]->nb_index_entries)
1642  return AVERROR_INVALIDDATA;
1643  avio_seek(s->pb, s->streams[stream_index]->index_entries[idx].pos, SEEK_SET);
1644  } else {
1645  if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1646  return ret;
1647  }
1648 
1650 
1651  return 0;
1652 }
1653 
1655 {
1656  int j, ret;
1657  const GUIDParseTable *g;
1658 
1659  swap_guid(guid);
1660  g = gdef;
1661  for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1662  if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1663  return g;
1664  g++;
1665  }
1666 
1667  return NULL;
1668 }
1669 
1670 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
1671 {
1672  ASFContext *asf = s->priv_data;
1673  AVIOContext *pb = s->pb;
1674  const GUIDParseTable *g = NULL;
1675  ff_asf_guid guid;
1676  int ret;
1677 
1678  if (offset > INT64_MAX - size)
1679  return AVERROR_INVALIDDATA;
1680 
1681  while (avio_tell(pb) <= offset + size) {
1682  if (avio_tell(pb) == asf->offset)
1683  break;
1684  asf->offset = avio_tell(pb);
1685  if ((ret = ff_get_guid(pb, &guid)) < 0)
1686  return ret;
1687  g = find_guid(guid);
1688  if (g) {
1689  if ((ret = g->read_object(s, g)) < 0)
1690  return ret;
1691  } else {
1692  GUIDParseTable g2;
1693 
1694  g2.name = "Unknown";
1695  g2.is_subobject = 1;
1696  asf_read_unknown(s, &g2);
1697  }
1698  }
1699 
1700  return 0;
1701 }
1702 
1704 {
1705  ASFContext *asf = s->priv_data;
1706  AVIOContext *pb = s->pb;
1707  const GUIDParseTable *g = NULL;
1708  ff_asf_guid guid;
1709  int i, ret;
1710  uint64_t size;
1711 
1712  asf->preroll = 0;
1713  asf->is_simple_index = 0;
1714  ff_get_guid(pb, &guid);
1715  if (ff_guidcmp(&guid, &ff_asf_header))
1716  return AVERROR_INVALIDDATA;
1717  avio_skip(pb, 8); // skip header object size
1718  avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1719  asf->data_reached = 0;
1720 
1721  /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1722  * for the first time,
1723  * Index object is processed and got eof and then seeking back to the Data is performed.
1724  */
1725  while (1) {
1726  // for the cases when object size is invalid
1727  if (avio_tell(pb) == asf->offset)
1728  break;
1729  asf->offset = avio_tell(pb);
1730  if ((ret = ff_get_guid(pb, &guid)) < 0) {
1731  if (ret == AVERROR_EOF && asf->data_reached)
1732  break;
1733  else
1734  goto failed;
1735  }
1736  g = find_guid(guid);
1737  if (g) {
1738  asf->unknown_offset = asf->offset;
1739  asf->is_header = 1;
1740  if ((ret = g->read_object(s, g)) < 0)
1741  goto failed;
1742  } else {
1743  size = avio_rl64(pb);
1744  align_position(pb, asf->offset, size);
1745  }
1746  if (asf->data_reached &&
1747  (!(pb->seekable & AVIO_SEEKABLE_NORMAL) ||
1748  (asf->b_flags & ASF_FLAG_BROADCAST)))
1749  break;
1750  }
1751 
1752  if (!asf->data_reached) {
1753  av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1754  ret = AVERROR_INVALIDDATA;
1755  goto failed;
1756  }
1757  if (pb->seekable & AVIO_SEEKABLE_NORMAL)
1758  avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1759 
1760  for (i = 0; i < asf->nb_streams; i++) {
1761  const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1762  AVStream *st = s->streams[asf->asf_st[i]->index];
1763  set_language(s, rfc1766, &st->metadata);
1764  }
1765 
1766  for (i = 0; i < ASF_MAX_STREAMS; i++) {
1767  AVStream *st = NULL;
1768 
1769  st = find_stream(s, i);
1770  if (st) {
1772  if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1775  }
1776  }
1777  }
1778 
1779  return 0;
1780 
1781 failed:
1782  asf_read_close(s);
1783  return ret;
1784 }
1785 
1787  .name = "asf_o",
1788  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1789  .priv_data_size = sizeof(ASFContext),
1790  .read_probe = asf_probe,
1794  .read_timestamp = asf_read_timestamp,
1797 };
const ff_asf_guid ff_asf_video_stream
Definition: asf.c:47
const ff_asf_guid ff_asf_command_stream
Definition: asf.c:59
const ff_asf_guid ff_asf_header
Definition: asf.c:23
const ff_asf_guid ff_asf_audio_stream
Definition: asf.c:39
const ff_asf_guid ff_asf_ext_stream_embed_stream_header
Definition: asf.c:94
const ff_asf_guid ff_asf_jfif_media
Definition: asf.c:51
#define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT
Definition: asf.h:126
#define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE
Definition: asf.h:152
#define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE
Definition: asf.h:157
#define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE
Definition: asf.h:136
#define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE
Definition: asf.h:147
#define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT
Definition: asf.h:107
#define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE
Definition: asf.h:141
#define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE
Definition: asf.h:131
void ff_asfcrypt_dec(const uint8_t key[20], uint8_t *data, int len)
Definition: asfcrypt.c:147
#define ASF_FLAG_BROADCAST
Definition: asfdec_o.c:47
static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type)
Definition: asfdec_o.c:548
static const GUIDParseTable * find_guid(ff_asf_guid guid)
Definition: asfdec_o.c:1654
static int asf_read_picture(AVFormatContext *s, int len)
Definition: asfdec_o.c:361
static void get_id3_tag(AVFormatContext *s, int len)
Definition: asfdec_o.c:451
static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:936
static int parse_video_info(AVIOContext *pb, AVStream *st)
Definition: asfdec_o.c:688
static int asf_read_value(AVFormatContext *s, const uint8_t *name, uint16_t val_len, int type, AVDictionary **met)
Definition: asfdec_o.c:276
static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:840
static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:568
static int asf_read_header(AVFormatContext *s)
Definition: asfdec_o.c:1703
#define ASF_ERROR_CORRECTION_LENGTH_TYPE
Definition: asfdec_o.c:55
#define ASF_BOOL
Definition: asfdec_o.c:41
static void reset_packet(ASFPacket *asf_pkt)
Definition: asfdec_o.c:1138
static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
Definition: asfdec_o.c:827
AVInputFormat ff_asf_o_demuxer
Definition: asfdec_o.c:1786
static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
Definition: asfdec_o.c:317
static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:495
static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1170
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec_o.c:1434
static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
Definition: asfdec_o.c:203
#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE
Definition: asfdec_o.c:56
static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index, int64_t *pos, int64_t pos_limit)
Definition: asfdec_o.c:1571
static int asf_read_packet_header(AVFormatContext *s)
Definition: asfdec_o.c:1353
static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
Definition: asfdec_o.c:167
#define ASF_UNICODE
Definition: asfdec_o.c:46
static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
Definition: asfdec_o.c:1388
#define ASF_DWORD
Definition: asfdec_o.c:44
static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:220
#define BMP_HEADER_SIZE
Definition: asfdec_o.c:53
static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len, uint16_t val_len, uint16_t type, AVDictionary **met)
Definition: asfdec_o.c:463
#define READ_LEN(flag, name, len)
Definition: asfdec_o.c:1071
static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:616
static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:910
static int asf_probe(const AVProbeData *pd)
Definition: asfdec_o.c:150
#define ASF_GUID
Definition: asfdec_o.c:43
#define ASF_BYTE_ARRAY
Definition: asfdec_o.c:48
static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1221
#define ASF_QWORD
Definition: asfdec_o.c:45
static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:645
static const GUIDParseTable gdef[]
Definition: asfdec_o.c:1021
static void swap_guid(ff_asf_guid guid)
Definition: asfdec_o.c:159
static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
Definition: asfdec_o.c:1670
static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:173
#define ASF_NUM_OF_PAYLOADS
Definition: asfdec_o.c:54
static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:972
static int asf_read_close(AVFormatContext *s)
Definition: asfdec_o.c:1518
#define ASF_MAX_STREAMS
Definition: asfdec_o.c:52
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: asfdec_o.c:1633
static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len, unsigned char *ch, uint16_t buflen)
Definition: asfdec_o.c:262
static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
Definition: asfdec_o.c:1083
static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec_o.c:1273
static AVStream * find_stream(AVFormatContext *s, uint16_t st_num)
Definition: asfdec_o.c:532
#define ASF_STREAM_NUM
Definition: asfdec_o.c:51
static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:721
static int asf_set_metadata(AVFormatContext *s, const uint8_t *name, int type, AVDictionary **met)
Definition: asfdec_o.c:340
#define ASF_WORD
Definition: asfdec_o.c:42
static void reset_packet_state(AVFormatContext *s)
Definition: asfdec_o.c:1535
static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1148
Macro definitions for various function/variable attributes.
#define av_unused
Definition: attributes.h:131
uint8_t
int32_t
Main libavformat public API header.
#define AVINDEX_KEYFRAME
Definition: avformat.h:811
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:469
#define AVFMT_NOBINSEARCH
Format does not allow to fall back on binary search via read_timestamp.
Definition: avformat.h:468
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
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:841
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
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.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:734
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:624
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:758
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
const char * ff_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
Convert a language code to a target codespace.
Definition: avlanguage.c:736
@ AV_LANG_ISO639_2_BIBL
Definition: avlanguage.h:28
byte swapping routines
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
#define fail()
Definition: checkasm.h:133
common internal and external API header
#define FFSWAP(type, a, b)
Definition: common.h:108
#define GET_UTF16(val, GET_16BIT, ERROR)
Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.
Definition: common.h:524
#define av_clip
Definition: common.h:122
#define FFMAX(a, b)
Definition: common.h:103
#define PUT_UTF8(val, tmp, PUT_BYTE)
Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
Definition: common.h:552
#define NULL
Definition: coverity.c:32
Public dictionary API.
double value
Definition: eval.c:98
enum AVCodecID id
int
static int64_t start_time
Definition: ffplay.c:332
static int nb_streams
Definition: ffprobe.c:283
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding.
Definition: avcodec.h:215
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:75
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:634
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
Initialize a reference-counted packet from av_malloc()ed data.
Definition: avpacket.c:166
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:690
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:99
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4505
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2011
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2128
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key,...
Definition: dict.h:70
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:74
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
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
AVMediaType
Definition: avutil.h:199
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
@ AVMEDIA_TYPE_UNKNOWN
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
cl_device_type type
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata.
Definition: id3v2.c:1116
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:107
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1122
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header.
Definition: id3v2.c:1138
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1178
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:131
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int i
Definition: input.c:407
int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().
Definition: utils.c:2143
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:4941
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4635
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3129
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
const char * desc
Definition: libsvtav1.c:79
uint32_t tag
Definition: movenc.c:1600
const char data[16]
Definition: mxf.c:142
AVOptions.
const char * name
Definition: qsvenc.c:46
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:33
internal header for RIFF based (de)muxers do NOT include this in end user applications
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:122
int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riffdec.c:32
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:209
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
uint8_t ff_asf_guid[16]
Definition: riff.h:96
#define FF_ARRAY_ELEMS(a)
#define snprintf
Definition: snprintf.h:34
unsigned int pos
Definition: spdifenc.c:412
uint64_t nb_packets
how many packets are there in the file, invalid if broadcasting
Definition: asfdec_o.c:100
int64_t packet_offset
Definition: asfdec_o.c:129
ASFStream * asf_st
currently decoded stream
Definition: asfdec_f.c:112
uint32_t packet_size_internal
Definition: asfdec_o.c:128
enum ASFContext::@243 state
uint64_t sub_header_offset
Definition: asfdec_o.c:125
int64_t offset
Definition: asfdec_o.c:111
@ READ_SINGLE
Definition: asfdec_o.c:141
@ PARSE_PACKET_HEADER
Definition: asfdec_o.c:140
@ READ_MULTI_SUB
Definition: asfdec_o.c:143
@ READ_MULTI
Definition: asfdec_o.c:142
int is_header
Definition: asfdec_o.c:97
int return_subpayload
Definition: asfdec_o.c:138
int nb_streams
Definition: asfdec_o.c:120
uint64_t data_offset
beginning of the first data packet
Definition: asfdec_f.c:85
uint32_t pad_len
Definition: asfdec_o.c:130
int64_t send_time
Definition: asfdec_o.c:102
int64_t sub_dts
Definition: asfdec_o.c:126
uint64_t preroll
Definition: asfdec_o.c:99
unsigned int nb_sub
Definition: asfdec_o.c:135
uint32_t prop_flags
Definition: asfdec_o.c:106
uint64_t data_size
Definition: asfdec_o.c:108
uint64_t nb_mult_left
Definition: asfdec_o.c:137
uint64_t unknown_size
Definition: asfdec_o.c:109
int64_t data_offset
Definition: asfdec_o.c:113
ASFStreamData asf_sd[ASF_MAX_STREAMS]
Definition: asfdec_o.c:119
uint32_t packet_size
Definition: asfdec_o.c:101
int stream_index
Definition: asfdec_f.c:110
uint32_t b_flags
Definition: asfdec_o.c:105
uint16_t mult_sub_len
Definition: asfdec_o.c:136
uint8_t dts_delta
Definition: asfdec_o.c:127
uint32_t rep_data_len
Definition: asfdec_o.c:131
int data_reached
Definition: asfdec_o.c:95
int64_t first_packet_offset
Definition: asfdec_o.c:114
int duration
Definition: asfdec_o.c:103
int64_t unknown_offset
Definition: asfdec_o.c:115
int is_simple_index
Definition: asfdec_o.c:96
uint64_t sub_left
Definition: asfdec_o.c:134
int duration
Definition: asfdec_o.c:71
int64_t dts
Definition: asfdec_o.c:67
int data_size
Definition: asfdec_o.c:70
uint8_t stream_index
Definition: asfdec_o.c:73
AVPacket * avpkt
Definition: asfdec_o.c:66
int size_left
Definition: asfdec_o.c:72
int flags
Definition: asfdec_o.c:69
uint32_t frame_num
Definition: asfdec_o.c:68
AVRational aspect_ratio
Definition: asfdec_o.c:91
char langs[32]
Definition: asfdec_o.c:89
AVDictionary * asf_met
Definition: asfdec_o.c:90
int type
Definition: asfdec_o.c:79
int8_t span
Definition: asfdec_o.c:81
AVPacket pkt
Definition: asfdec_f.c:51
int indexed
Definition: asfdec_o.c:80
ASFPacket pkt
Definition: asfdec_o.c:85
uint16_t virtual_chunk_len
Definition: asfdec_o.c:83
int index
Definition: asfdec_o.c:78
uint16_t virtual_pkt_len
Definition: asfdec_o.c:82
int16_t lang_idx
Definition: asfdec_o.c:84
uint8_t stream_index
Definition: asfdec_o.c:77
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
int width
Video only.
Definition: codec_par.h:126
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
Format I/O context.
Definition: avformat.h:1232
Bytestream IO Context.
Definition: avio.h:161
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int size
Definition: packet.h:370
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:368
uint8_t * data
Definition: packet.h:369
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:935
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:922
AVDictionary * metadata
Definition: avformat.h:937
int id
Format-specific stream ID.
Definition: avformat.h:880
int index
stream index in AVFormatContext
Definition: avformat.h:874
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:912
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:955
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:946
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:926
char str[32]
Definition: internal.h:48
enum AVCodecID id
Definition: internal.h:49
int(* read_object)(AVFormatContext *, const struct GUIDParseTable *)
Definition: asfdec_o.c:61
const char * name
Definition: asfdec_o.c:59
ff_asf_guid guid
Definition: asfdec_o.c:60
int is_subobject
Definition: asfdec_o.c:62
#define av_free(p)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
static uint8_t tmp[11]
Definition: aes_ctr.c:27
int64_t bitrate
Definition: h264_levels.c:131
AVPacket * pkt
Definition: movenc.c:59
#define gmtime_r
Definition: time_internal.h:34
static int64_t pts
int size
const char * g
Definition: vf_curves.c:117
if(ret< 0)
Definition: vf_mcdeint.c:282
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
int len