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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;
61  int (*read_object)(AVFormatContext *, const struct GUIDParseTable *);
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(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 ((ret = avio_get_str16le(pb, len, name,
249  sizeof(name))) < len)
250  avio_skip(pb, len - ret);
251  avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
253  }
254  align_position(pb, asf->offset, size);
255 
256  return 0;
257 }
258 
259 static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
260  unsigned char *ch, uint16_t buflen)
261 {
262  AVIOContext *pb = s->pb;
263 
264  avio_get_str16le(pb, len, ch, buflen);
265  if (ch[0]) {
266  if (av_dict_set(&s->metadata, title, ch, 0) < 0)
267  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
268  }
269 
270  return 0;
271 }
272 
274  uint16_t val_len, int type, AVDictionary **met)
275 {
276  int ret;
277  uint8_t *value;
278  uint16_t buflen = 2 * val_len + 1;
279  AVIOContext *pb = s->pb;
280 
281  value = av_malloc(buflen);
282  if (!value)
283  return AVERROR(ENOMEM);
284  if (type == ASF_UNICODE) {
285  // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
286  if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
287  goto failed;
288  if (av_dict_set(met, name, value, 0) < 0)
289  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
290  } else {
291  char buf[256];
292  if (val_len > sizeof(buf)) {
293  ret = AVERROR_INVALIDDATA;
294  goto failed;
295  }
296  if ((ret = avio_read(pb, value, val_len)) < 0)
297  goto failed;
298  if (ret < 2 * val_len)
299  value[ret] = '\0';
300  else
301  value[2 * val_len - 1] = '\0';
302  snprintf(buf, sizeof(buf), "%s", value);
303  if (av_dict_set(met, name, buf, 0) < 0)
304  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
305  }
306  av_freep(&value);
307 
308  return 0;
309 
310 failed:
311  av_freep(&value);
312  return ret;
313 }
314 static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
315 {
316 
317  switch (type) {
318  case ASF_BOOL:
319  *value = avio_rl16(pb);
320  break;
321  case ASF_DWORD:
322  *value = avio_rl32(pb);
323  break;
324  case ASF_QWORD:
325  *value = avio_rl64(pb);
326  break;
327  case ASF_WORD:
328  *value = avio_rl16(pb);
329  break;
330  default:
331  return AVERROR_INVALIDDATA;
332  }
333 
334  return 0;
335 }
336 
338  int type, AVDictionary **met)
339 {
340  AVIOContext *pb = s->pb;
341  uint64_t value;
342  char buf[32];
343  int ret;
344 
345  ret = asf_read_generic_value(pb, type, &value);
346  if (ret < 0)
347  return ret;
348 
349  snprintf(buf, sizeof(buf), "%"PRIu64, value);
350  if (av_dict_set(met, name, buf, 0) < 0)
351  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
352 
353  return 0;
354 }
355 
356 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
357  * but in reality this is only loosely similar */
359 {
360  ASFContext *asf = s->priv_data;
361  AVPacket pkt = { 0 };
362  const CodecMime *mime = ff_id3v2_mime_tags;
363  enum AVCodecID id = AV_CODEC_ID_NONE;
364  char mimetype[64];
365  uint8_t *desc = NULL;
366  AVStream *st = NULL;
367  int ret, type, picsize, desc_len;
368  ASFStream *asf_st;
369 
370  /* type + picsize + mime + desc */
371  if (len < 1 + 4 + 2 + 2) {
372  av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
373  return AVERROR_INVALIDDATA;
374  }
375 
376  /* picture type */
377  type = avio_r8(s->pb);
378  len--;
379  if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
380  av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
381  type = 0;
382  }
383 
384  /* picture data size */
385  picsize = avio_rl32(s->pb);
386  len -= 4;
387 
388  /* picture MIME type */
389  len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
390  while (mime->id != AV_CODEC_ID_NONE) {
391  if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
392  id = mime->id;
393  break;
394  }
395  mime++;
396  }
397  if (id == AV_CODEC_ID_NONE) {
398  av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
399  mimetype);
400  return 0;
401  }
402 
403  if (picsize >= len) {
404  av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
405  picsize, len);
406  return AVERROR_INVALIDDATA;
407  }
408 
409  /* picture description */
410  desc_len = (len - picsize) * 2 + 1;
411  desc = av_malloc(desc_len);
412  if (!desc)
413  return AVERROR(ENOMEM);
414  len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
415 
416  ret = av_get_packet(s->pb, &pkt, picsize);
417  if (ret < 0)
418  goto fail;
419 
420  st = avformat_new_stream(s, NULL);
421  if (!st) {
422  ret = AVERROR(ENOMEM);
423  goto fail;
424  }
425  asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
426  asf_st = asf->asf_st[asf->nb_streams];
427  if (!asf_st) {
428  ret = AVERROR(ENOMEM);
429  goto fail;
430  }
431 
433  st->codecpar->codec_type = asf_st->type = AVMEDIA_TYPE_VIDEO;
434  st->codecpar->codec_id = id;
435  st->attached_pic = pkt;
436  st->attached_pic.stream_index = asf_st->index = st->index;
438 
439  asf->nb_streams++;
440 
441  if (*desc) {
442  if (av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL) < 0)
443  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
444  } else
445  av_freep(&desc);
446 
447  if (av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0) < 0)
448  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
449 
450  return 0;
451 
452 fail:
453  av_freep(&desc);
454  av_packet_unref(&pkt);
455  return ret;
456 }
457 
458 static void get_id3_tag(AVFormatContext *s, int len)
459 {
460  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
461 
462  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
463  if (id3v2_extra_meta)
464  ff_id3v2_parse_apic(s, &id3v2_extra_meta);
465  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
466 }
467 
468 static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
469  uint16_t val_len, uint16_t type, AVDictionary **met)
470 {
471  int ret;
472  ff_asf_guid guid;
473 
474  if (val_len) {
475  switch (type) {
476  case ASF_UNICODE:
477  asf_read_value(s, name, val_len, type, met);
478  break;
479  case ASF_BYTE_ARRAY:
480  if (!strcmp(name, "WM/Picture")) // handle cover art
481  asf_read_picture(s, val_len);
482  else if (!strcmp(name, "ID3")) // handle ID3 tag
483  get_id3_tag(s, val_len);
484  else
485  asf_read_value(s, name, val_len, type, met);
486  break;
487  case ASF_GUID:
488  ff_get_guid(s->pb, &guid);
489  break;
490  default:
491  if ((ret = asf_set_metadata(s, name, type, met)) < 0)
492  return ret;
493  break;
494  }
495  }
496 
497  return 0;
498 }
499 
501 {
502  ASFContext *asf = s->priv_data;
503  AVIOContext *pb = s->pb;
504  uint64_t size = avio_rl64(pb);
505  uint16_t nb_desc = avio_rl16(pb);
506  int i, ret;
507 
508  for (i = 0; i < nb_desc; i++) {
509  uint16_t name_len, type, val_len;
510  uint8_t *name = NULL;
511 
512  name_len = avio_rl16(pb);
513  if (!name_len)
514  return AVERROR_INVALIDDATA;
515  name = av_malloc(name_len);
516  if (!name)
517  return AVERROR(ENOMEM);
518  avio_get_str16le(pb, name_len, name,
519  name_len);
520  type = avio_rl16(pb);
521  // BOOL values are 16 bits long in the Metadata Object
522  // but 32 bits long in the Extended Content Description Object
523  if (type == ASF_BOOL)
524  type = ASF_DWORD;
525  val_len = avio_rl16(pb);
526 
527  ret = process_metadata(s, name, name_len, val_len, type, &s->metadata);
528  av_freep(&name);
529  if (ret < 0)
530  return ret;
531  }
532 
533  align_position(pb, asf->offset, size);
534  return 0;
535 }
536 
537 static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
538 {
539  AVStream *st = NULL;
540  ASFContext *asf = s->priv_data;
541  int i;
542 
543  for (i = 0; i < asf->nb_streams; i++) {
544  if (asf->asf_st[i]->stream_index == st_num) {
545  st = s->streams[asf->asf_st[i]->index];
546  break;
547  }
548  }
549 
550  return st;
551 }
552 
554 {
555  ASFContext *asf = s->priv_data;
556  AVIOContext *pb = s->pb;
557  uint64_t value = 0;
558  int ret;
559 
560  ret = asf_read_generic_value(pb, type, &value);
561  if (ret < 0)
562  return ret;
563 
564  if (st_num < ASF_MAX_STREAMS) {
565  if (!strcmp(name, "AspectRatioX"))
566  asf->asf_sd[st_num].aspect_ratio.num = value;
567  else
568  asf->asf_sd[st_num].aspect_ratio.den = value;
569  }
570  return 0;
571 }
572 
574 {
575  ASFContext *asf = s->priv_data;
576  AVIOContext *pb = s->pb;
577  uint64_t size = avio_rl64(pb);
578  uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
579  int i, ret;
580 
581  for (i = 0; i < nb_recs; i++) {
582  uint16_t name_len, buflen, type, val_len, st_num;
583  uint8_t *name = NULL;
584 
585  avio_skip(pb, 2); // skip reserved field
586  st_num = avio_rl16(pb);
587  name_len = avio_rl16(pb);
588  buflen = 2 * name_len + 1;
589  if (!name_len)
590  break;
591  type = avio_rl16(pb);
592  val_len = avio_rl32(pb);
593  name = av_malloc(buflen);
594  if (!name)
595  return AVERROR(ENOMEM);
596  avio_get_str16le(pb, name_len, name,
597  buflen);
598  if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
599  ret = asf_store_aspect_ratio(s, st_num, name, type);
600  if (ret < 0) {
601  av_freep(&name);
602  break;
603  }
604  } else {
605  if (st_num < ASF_MAX_STREAMS) {
606  if ((ret = process_metadata(s, name, name_len, val_len, type,
607  &asf->asf_sd[st_num].asf_met)) < 0) {
608  av_freep(&name);
609  break;
610  }
611  }
612  }
613  av_freep(&name);
614  }
615 
616  align_position(pb, asf->offset, size);
617  return 0;
618 }
619 
621 {
622  ASFContext *asf = s->priv_data;
623  AVIOContext *pb = s->pb;
624  int i;
625  static const char *const titles[] =
626  { "Title", "Author", "Copyright", "Description", "Rate" };
627  uint16_t len[5], buflen[5] = { 0 };
628  uint8_t *ch;
629  uint64_t size = avio_rl64(pb);
630 
631  for (i = 0; i < 5; i++) {
632  len[i] = avio_rl16(pb);
633  // utf8 string should be <= 2 * utf16 string, extra byte for the terminator
634  buflen[i] = 2 * len[i] + 1;
635  }
636 
637  for (i = 0; i < 5; i++) {
638  ch = av_malloc(buflen[i]);
639  if (!ch)
640  return(AVERROR(ENOMEM));
641  asf_read_metadata(s, titles[i], len[i], ch, buflen[i]);
642  av_freep(&ch);
643  }
644  align_position(pb, asf->offset, size);
645 
646  return 0;
647 }
648 
650 {
651  ASFContext *asf = s->priv_data;
652  AVIOContext *pb = s->pb;
653  time_t creation_time;
654 
655  avio_rl64(pb); // read object size
656  avio_skip(pb, 16); // skip File ID
657  avio_skip(pb, 8); // skip File size
658  creation_time = avio_rl64(pb);
659  if (!(asf->b_flags & ASF_FLAG_BROADCAST)) {
660  struct tm tmbuf;
661  struct tm *tm;
662  char buf[64];
663 
664  // creation date is in 100 ns units from 1 Jan 1601, conversion to s
665  creation_time /= 10000000;
666  // there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970
667  creation_time -= 11644473600;
668  tm = gmtime_r(&creation_time, &tmbuf);
669  if (tm) {
670  if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
671  buf[0] = '\0';
672  } else
673  buf[0] = '\0';
674  if (buf[0]) {
675  if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0)
676  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
677  }
678  }
679  asf->nb_packets = avio_rl64(pb);
680  asf->duration = avio_rl64(pb) / 10000; // stream duration
681  avio_skip(pb, 8); // skip send duration
682  asf->preroll = avio_rl64(pb);
683  asf->duration -= asf->preroll;
684  asf->b_flags = avio_rl32(pb);
685  avio_skip(pb, 4); // skip minimal packet size
686  asf->packet_size = avio_rl32(pb);
687  avio_skip(pb, 4); // skip max_bitrate
688 
689  return 0;
690 }
691 
693 {
694  uint16_t size;
695  unsigned int tag;
696 
697  st->codecpar->width = avio_rl32(pb);
698  st->codecpar->height = avio_rl32(pb);
699  avio_skip(pb, 1); // skip reserved flags
700  size = avio_rl16(pb); // size of the Format Data
701  tag = ff_get_bmp_header(pb, st, NULL);
702  st->codecpar->codec_tag = tag;
704 
705  if (size > BMP_HEADER_SIZE) {
706  int ret;
710  st->codecpar->extradata_size = 0;
711  return AVERROR(ENOMEM);
712  }
713  memset(st->codecpar->extradata + st->codecpar->extradata_size , 0,
715  if ((ret = avio_read(pb, st->codecpar->extradata,
716  st->codecpar->extradata_size)) < 0)
717  return ret;
718  }
719  return 0;
720 }
721 
723 {
724  ASFContext *asf = s->priv_data;
725  AVIOContext *pb = s->pb;
726  uint64_t size;
727  uint32_t err_data_len, ts_data_len; // type specific data length
728  uint16_t flags;
729  ff_asf_guid stream_type;
730  enum AVMediaType type;
731  int i, ret;
732  uint8_t stream_index;
733  AVStream *st;
734  ASFStream *asf_st;
735 
736  // ASF file must not contain more than 128 streams according to the specification
737  if (asf->nb_streams >= ASF_MAX_STREAMS)
738  return AVERROR_INVALIDDATA;
739 
740  size = avio_rl64(pb);
741  ff_get_guid(pb, &stream_type);
742  if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
743  type = AVMEDIA_TYPE_AUDIO;
744  else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
745  type = AVMEDIA_TYPE_VIDEO;
746  else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
747  type = AVMEDIA_TYPE_VIDEO;
748  else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
749  type = AVMEDIA_TYPE_DATA;
750  else if (!ff_guidcmp(&stream_type,
752  type = AVMEDIA_TYPE_UNKNOWN;
753  else
754  return AVERROR_INVALIDDATA;
755 
756  ff_get_guid(pb, &stream_type); // error correction type
757  avio_skip(pb, 8); // skip the time offset
758  ts_data_len = avio_rl32(pb);
759  err_data_len = avio_rl32(pb);
760  flags = avio_rl16(pb); // bit 15 - Encrypted Content
761 
762  stream_index = flags & ASF_STREAM_NUM;
763  for (i = 0; i < asf->nb_streams; i++)
764  if (stream_index == asf->asf_st[i]->stream_index) {
766  "Duplicate stream found, this stream will be ignored.\n");
767  align_position(pb, asf->offset, size);
768  return 0;
769  }
770 
771  st = avformat_new_stream(s, NULL);
772  if (!st)
773  return AVERROR(ENOMEM);
774  avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
775  st->codecpar->codec_type = type;
776  asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
777  if (!asf->asf_st[asf->nb_streams])
778  return AVERROR(ENOMEM);
779  asf_st = asf->asf_st[asf->nb_streams];
780  asf->nb_streams++;
781  asf_st->stream_index = stream_index;
782  asf_st->index = st->index;
783  asf_st->indexed = 0;
784  st->id = flags & ASF_STREAM_NUM;
785  av_init_packet(&asf_st->pkt.avpkt);
786  asf_st->pkt.data_size = 0;
787  avio_skip(pb, 4); // skip reserved field
788 
789  switch (type) {
790  case AVMEDIA_TYPE_AUDIO:
791  asf_st->type = AVMEDIA_TYPE_AUDIO;
792  if ((ret = ff_get_wav_header(s, pb, st->codecpar, ts_data_len, 0)) < 0)
793  return ret;
794  break;
795  case AVMEDIA_TYPE_VIDEO:
796  asf_st->type = AVMEDIA_TYPE_VIDEO;
797  if ((ret = parse_video_info(pb, st)) < 0)
798  return ret;
799  break;
800  default:
801  avio_skip(pb, ts_data_len);
802  break;
803  }
804 
805  if (err_data_len) {
806  if (type == AVMEDIA_TYPE_AUDIO) {
807  uint8_t span = avio_r8(pb);
808  if (span > 1) {
809  asf_st->span = span;
810  asf_st->virtual_pkt_len = avio_rl16(pb);
811  asf_st->virtual_chunk_len = avio_rl16(pb);
812  if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
813  return AVERROR_INVALIDDATA;
814  avio_skip(pb, err_data_len - 5);
815  } else
816  avio_skip(pb, err_data_len - 1);
817  } else
818  avio_skip(pb, err_data_len);
819  }
820 
821  align_position(pb, asf->offset, size);
822 
823  return 0;
824 }
825 
826 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
827 {
828  // language abbr should contain at least 2 chars
829  if (rfc1766 && strlen(rfc1766) > 1) {
830  const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
831  const char *iso6392 = av_convert_lang_to(primary_tag,
833  if (iso6392)
834  if (av_dict_set(met, "language", iso6392, 0) < 0)
835  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
836  }
837 }
838 
840 {
841  ASFContext *asf = s->priv_data;
842  AVIOContext *pb = s->pb;
843  AVStream *st = NULL;
844  ff_asf_guid guid;
845  uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
846  int i, ret;
847  uint32_t bitrate;
848  uint64_t start_time, end_time, time_per_frame;
849  uint64_t size = avio_rl64(pb);
850 
851  start_time = avio_rl64(pb);
852  end_time = avio_rl64(pb);
853  bitrate = avio_rl32(pb);
854  avio_skip(pb, 28); // skip some unused values
855  st_num = avio_rl16(pb);
856  st_num &= ASF_STREAM_NUM;
857  lang_idx = avio_rl16(pb); // Stream Language ID Index
858  for (i = 0; i < asf->nb_streams; i++) {
859  if (st_num == asf->asf_st[i]->stream_index) {
860  st = s->streams[asf->asf_st[i]->index];
861  asf->asf_st[i]->lang_idx = lang_idx;
862  break;
863  }
864  }
865  time_per_frame = avio_rl64(pb); // average time per frame
866  if (st) {
867  st->start_time = start_time;
868  st->duration = end_time - start_time;
869  st->codecpar->bit_rate = bitrate;
870  st->avg_frame_rate.num = 10000000;
871  st->avg_frame_rate.den = time_per_frame;
872  }
873  nb_st_name = avio_rl16(pb);
874  nb_pay_exts = avio_rl16(pb);
875  for (i = 0; i < nb_st_name; i++) {
876  uint16_t len;
877 
878  avio_rl16(pb); // Language ID Index
879  len = avio_rl16(pb);
880  avio_skip(pb, len);
881  }
882 
883  for (i = 0; i < nb_pay_exts; i++) {
884  uint32_t len;
885  avio_skip(pb, 16); // Extension System ID
886  avio_skip(pb, 2); // Extension Data Size
887  len = avio_rl32(pb);
888  avio_skip(pb, len);
889  }
890 
891  if ((ret = ff_get_guid(pb, &guid)) < 0) {
892  align_position(pb, asf->offset, size);
893 
894  return 0;
895  }
896 
897  g = find_guid(guid);
898  if (g && !(strcmp(g->name, "Stream Properties"))) {
899  if ((ret = g->read_object(s, g)) < 0)
900  return ret;
901  }
902 
903  align_position(pb, asf->offset, size);
904  return 0;
905 }
906 
908 {
909  ASFContext *asf = s->priv_data;
910  AVIOContext *pb = s->pb;
911  int i, ret;
912  uint64_t size = avio_rl64(pb);
913  uint16_t nb_langs = avio_rl16(pb);
914 
915  if (nb_langs < ASF_MAX_STREAMS) {
916  for (i = 0; i < nb_langs; i++) {
917  size_t len;
918  len = avio_r8(pb);
919  if (!len)
920  len = 6;
921  if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
922  sizeof(asf->asf_sd[i].langs))) < 0) {
923  return ret;
924  }
925  }
926  }
927 
928  align_position(pb, asf->offset, size);
929  return 0;
930 }
931 
932 // returns data object offset when reading this object for the first time
934 {
935  ASFContext *asf = s->priv_data;
936  AVIOContext *pb = s->pb;
937  uint64_t size = asf->data_size = avio_rl64(pb);
938  int i;
939 
940  if (!asf->data_reached) {
941  asf->data_reached = 1;
942  asf->data_offset = asf->offset;
943  }
944 
945  for (i = 0; i < asf->nb_streams; i++) {
946  if (!(asf->b_flags & ASF_FLAG_BROADCAST))
947  s->streams[i]->duration = asf->duration;
948  }
949  asf->nb_mult_left = 0;
950  asf->sub_left = 0;
951  asf->state = PARSE_PACKET_HEADER;
952  asf->return_subpayload = 0;
953  asf->packet_size_internal = 0;
954  avio_skip(pb, 16); // skip File ID
955  size = avio_rl64(pb); // Total Data Packets
956  if (size != asf->nb_packets)
958  "Number of Packets from File Properties Object is not equal to Total"
959  "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
960  size, asf->nb_packets);
961  avio_skip(pb, 2); // skip reserved field
962  asf->first_packet_offset = avio_tell(pb);
963  if (pb->seekable && !(asf->b_flags & ASF_FLAG_BROADCAST))
964  align_position(pb, asf->offset, asf->data_size);
965 
966  return 0;
967 }
968 
970 {
971  ASFContext *asf = s->priv_data;
972  AVIOContext *pb = s->pb;
973  AVStream *st = NULL;
974  uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
975  uint32_t pkt_num, nb_entries;
976  int32_t prev_pkt_num = -1;
977  int i, ret;
978  uint64_t size = avio_rl64(pb);
979 
980  // simple index objects should be ordered by stream number, this loop tries to find
981  // the first not indexed video stream
982  for (i = 0; i < asf->nb_streams; i++) {
983  if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
984  asf->asf_st[i]->indexed = 1;
985  st = s->streams[asf->asf_st[i]->index];
986  break;
987  }
988  }
989  if (!st) {
990  avio_skip(pb, size - 24); // if there's no video stream, skip index object
991  return 0;
992  }
993  avio_skip(pb, 16); // skip File ID
994  interval = avio_rl64(pb);
995  avio_skip(pb, 4);
996  nb_entries = avio_rl32(pb);
997  for (i = 0; i < nb_entries; i++) {
998  pkt_num = avio_rl32(pb);
999  ret = avio_skip(pb, 2);
1000  if (ret < 0) {
1001  av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
1002  return ret;
1003  }
1004  if (prev_pkt_num != pkt_num) {
1006  pkt_num, av_rescale(interval, i, 10000),
1007  asf->packet_size, 0, AVINDEX_KEYFRAME);
1008  prev_pkt_num = pkt_num;
1009  }
1010  }
1011  asf->is_simple_index = 1;
1012  align_position(pb, asf->offset, size);
1013 
1014  return 0;
1015 }
1016 
1017 static const GUIDParseTable gdef[] = {
1018  { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
1019  { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
1020  { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
1021  { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
1022  { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
1023  { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
1024  { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
1025  { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
1026  { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1027  { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
1028  { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1029  { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
1030  { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
1031  { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1032  { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
1033  { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1034  { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
1035  { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
1036  { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1037  { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
1038  { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1039  { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1040  { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
1041  { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1042  { "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 },
1043  { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
1044  { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
1045  { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
1046  { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1047  { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
1048  { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
1049  { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
1050  { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1051  { "Content Encryption System Windows Media DRM Network Devices",
1052  { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
1053  { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1054  { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1055  { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1056  { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1057  { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1058  { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
1059  { "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 },
1060  { "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 },
1061  { "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 },
1062  { "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 },
1063  { "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 },
1064  { "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 },
1065 };
1066 
1067 #define READ_LEN(flag, name, len) \
1068  do { \
1069  if ((flag) == name ## IS_BYTE) \
1070  len = avio_r8(pb); \
1071  else if ((flag) == name ## IS_WORD) \
1072  len = avio_rl16(pb); \
1073  else if ((flag) == name ## IS_DWORD) \
1074  len = avio_rl32(pb); \
1075  else \
1076  len = 0; \
1077  } while(0)
1078 
1079 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
1080 {
1081  ASFContext *asf = s->priv_data;
1082  AVIOContext *pb = s->pb;
1083  uint8_t sub_len;
1084  int ret, i;
1085 
1086  if (is_header) {
1087  asf->dts_delta = avio_r8(pb);
1088  if (asf->nb_mult_left) {
1089  asf->mult_sub_len = avio_rl16(pb); // total
1090  }
1091  asf->sub_header_offset = avio_tell(pb);
1092  asf->nb_sub = 0;
1093  asf->sub_left = 1;
1094  }
1095  sub_len = avio_r8(pb);
1096  if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
1097  return ret;
1098  for (i = 0; i < asf->nb_streams; i++) {
1099  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1100  pkt->stream_index = asf->asf_st[i]->index;
1101  break;
1102  }
1103  }
1104  asf->return_subpayload = 1;
1105  if (!sub_len)
1106  asf->return_subpayload = 0;
1107 
1108  if (sub_len)
1109  asf->nb_sub++;
1110  pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1111  if (asf->nb_mult_left && (avio_tell(pb) >=
1112  (asf->sub_header_offset + asf->mult_sub_len))) {
1113  asf->sub_left = 0;
1114  asf->nb_mult_left--;
1115  }
1116  if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1117  asf->sub_left = 0;
1118  if (!asf->nb_mult_left) {
1119  avio_skip(pb, asf->pad_len);
1120  if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1121  if (!asf->packet_size)
1122  return AVERROR_INVALIDDATA;
1124  "Position %"PRId64" wrong, should be %"PRId64"\n",
1125  avio_tell(pb), asf->packet_offset + asf->packet_size);
1126  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1127  }
1128  }
1129  }
1130 
1131  return 0;
1132 }
1133 
1134 static void reset_packet(ASFPacket *asf_pkt)
1135 {
1136  asf_pkt->size_left = 0;
1137  asf_pkt->data_size = 0;
1138  asf_pkt->duration = 0;
1139  asf_pkt->flags = 0;
1140  asf_pkt->dts = 0;
1141  asf_pkt->duration = 0;
1142  av_packet_unref(&asf_pkt->avpkt);
1143  av_init_packet(&asf_pkt->avpkt);
1144 }
1145 
1147 {
1148  ASFContext *asf = s->priv_data;
1149  AVIOContext *pb = s->pb;
1150  int ret, data_size;
1151 
1152  if (!asf_pkt->data_size) {
1153  data_size = avio_rl32(pb); // read media object size
1154  if (data_size <= 0)
1155  return AVERROR_INVALIDDATA;
1156  if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1157  return ret;
1158  asf_pkt->data_size = asf_pkt->size_left = data_size;
1159  } else
1160  avio_skip(pb, 4); // reading of media object size is already done
1161  asf_pkt->dts = avio_rl32(pb); // read presentation time
1162  if (asf->rep_data_len && (asf->rep_data_len >= 8))
1163  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1164 
1165  return 0;
1166 }
1167 
1169  ASFPacket *asf_pkt)
1170 {
1171  ASFContext *asf = s->priv_data;
1172  AVIOContext *pb = s->pb;
1173  uint16_t pay_len;
1174  unsigned char *p;
1175  int ret;
1176  int skip = 0;
1177 
1178  // if replicated length is 1, subpayloads are present
1179  if (asf->rep_data_len == 1) {
1180  asf->sub_left = 1;
1181  asf->state = READ_MULTI_SUB;
1182  pkt->flags = asf_pkt->flags;
1183  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1184  return ret;
1185  } else {
1186  if (asf->rep_data_len)
1187  if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1188  return ret;
1189  pay_len = avio_rl16(pb); // payload length should be WORD
1190  if (pay_len > asf->packet_size) {
1191  av_log(s, AV_LOG_ERROR,
1192  "Error: invalid data packet size, pay_len %"PRIu16", "
1193  "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1194  pay_len, asf->packet_size, avio_tell(pb));
1195  return AVERROR_INVALIDDATA;
1196  }
1197  p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1198  if (pay_len > asf_pkt->size_left) {
1199  av_log(s, AV_LOG_ERROR,
1200  "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1201  pay_len, asf_pkt->size_left);
1202  skip = pay_len - asf_pkt->size_left;
1203  pay_len = asf_pkt->size_left;
1204  }
1205  if (asf_pkt->size_left <= 0)
1206  return AVERROR_INVALIDDATA;
1207  if ((ret = avio_read(pb, p, pay_len)) < 0)
1208  return ret;
1209  if (s->key && s->keylen == 20)
1210  ff_asfcrypt_dec(s->key, p, ret);
1211  avio_skip(pb, skip);
1212  asf_pkt->size_left -= pay_len;
1213  asf->nb_mult_left--;
1214  }
1215 
1216  return 0;
1217 }
1218 
1220 {
1221  ASFContext *asf = s->priv_data;
1222  AVIOContext *pb = s->pb;
1223  int64_t offset;
1224  uint64_t size;
1225  unsigned char *p;
1226  int ret, data_size;
1227 
1228  if (!asf_pkt->data_size) {
1229  data_size = avio_rl32(pb); // read media object size
1230  if (data_size <= 0)
1231  return AVERROR_EOF;
1232  if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1233  return ret;
1234  asf_pkt->data_size = asf_pkt->size_left = data_size;
1235  } else
1236  avio_skip(pb, 4); // skip media object size
1237  asf_pkt->dts = avio_rl32(pb); // read presentation time
1238  if (asf->rep_data_len >= 8)
1239  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1240  offset = avio_tell(pb);
1241 
1242  // size of the payload - size of the packet without header and padding
1243  if (asf->packet_size_internal)
1244  size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1245  else
1246  size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1247  if (size > asf->packet_size) {
1248  av_log(s, AV_LOG_ERROR,
1249  "Error: invalid data packet size, offset %"PRId64".\n",
1250  avio_tell(pb));
1251  return AVERROR_INVALIDDATA;
1252  }
1253  p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1254  if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1255  return AVERROR_INVALIDDATA;
1256  if (asf_pkt->size_left > size)
1257  asf_pkt->size_left -= size;
1258  else
1259  asf_pkt->size_left = 0;
1260  if ((ret = avio_read(pb, p, size)) < 0)
1261  return ret;
1262  if (s->key && s->keylen == 20)
1263  ff_asfcrypt_dec(s->key, p, ret);
1264  if (asf->packet_size_internal)
1265  avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1266  avio_skip(pb, asf->pad_len); // skip padding
1267 
1268  return 0;
1269 }
1270 
1272 {
1273  ASFContext *asf = s->priv_data;
1274  AVIOContext *pb = s->pb;
1275  int ret, i;
1276  ASFPacket *asf_pkt = NULL;
1277 
1278  if (!asf->sub_left) {
1279  uint32_t off_len, media_len;
1280  uint8_t stream_num;
1281 
1282  stream_num = avio_r8(pb);
1283  asf->stream_index = stream_num & ASF_STREAM_NUM;
1284  for (i = 0; i < asf->nb_streams; i++) {
1285  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1286  asf_pkt = &asf->asf_st[i]->pkt;
1287  asf_pkt->stream_index = asf->asf_st[i]->index;
1288  break;
1289  }
1290  }
1291  if (!asf_pkt) {
1292  if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1293  if (!asf->packet_size) {
1294  av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1295  return AVERROR_INVALIDDATA;
1296  }
1297  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1298  av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1299  asf->stream_index);
1300  return AVERROR(EAGAIN);
1301  } else
1302  return AVERROR_INVALIDDATA;
1303  }
1304 
1305  if (stream_num >> 7)
1306  asf_pkt->flags |= AV_PKT_FLAG_KEY;
1308  ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1310  ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1312  ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1313  if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1314  av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1315  reset_packet(asf_pkt);
1316  }
1317  asf_pkt->frame_num = media_len;
1318  asf->sub_dts = off_len;
1319  if (asf->nb_mult_left) {
1320  if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1321  return ret;
1322  } else if (asf->rep_data_len == 1) {
1323  asf->sub_left = 1;
1324  asf->state = READ_SINGLE;
1325  pkt->flags = asf_pkt->flags;
1326  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1327  return ret;
1328  } else {
1329  if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1330  return ret;
1331  }
1332  } else {
1333  for (i = 0; i <= asf->nb_streams; i++) {
1334  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1335  asf_pkt = &asf->asf_st[i]->pkt;
1336  break;
1337  }
1338  }
1339  if (!asf_pkt)
1340  return AVERROR_INVALIDDATA;
1341  pkt->flags = asf_pkt->flags;
1342  pkt->dts = asf_pkt->dts;
1343  pkt->stream_index = asf->asf_st[i]->index;
1344  if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1345  return ret;
1346  }
1347 
1348  return 0;
1349 }
1350 
1352 {
1353  ASFContext *asf = s->priv_data;
1354  AVIOContext *pb = s->pb;
1355  uint64_t size;
1356  uint32_t av_unused seq;
1357  unsigned char error_flags, len_flags, pay_flags;
1358 
1359  asf->packet_offset = avio_tell(pb);
1360  error_flags = avio_r8(pb); // read Error Correction Flags
1361  if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1362  if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1363  size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1364  avio_skip(pb, size);
1365  }
1366  len_flags = avio_r8(pb);
1367  } else
1368  len_flags = error_flags;
1369  asf->prop_flags = avio_r8(pb);
1371  ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1373  ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1375  ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1376  asf->send_time = avio_rl32(pb); // send time
1377  avio_skip(pb, 2); // skip duration
1378  if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1379  pay_flags = avio_r8(pb);
1380  asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1381  }
1382 
1383  return 0;
1384 }
1385 
1386 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1387 {
1388  ASFContext *asf = s->priv_data;
1389  ASFStream *asf_st = asf->asf_st[st_num];
1390  unsigned char *p = asf_pkt->avpkt.data;
1391  uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1392  uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1393  int nchunks = pkt_len / chunk_len;
1394  AVPacket pkt;
1395  int pos = 0, j, l, ret;
1396 
1397 
1398  if ((ret = av_new_packet(&pkt, asf_pkt->data_size)) < 0)
1399  return ret;
1400 
1401  while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1402  if (pos >= asf_pkt->data_size) {
1403  break;
1404  }
1405  for (l = 0; l < pkt_len; l++) {
1406  if (pos >= asf_pkt->data_size) {
1407  break;
1408  }
1409  for (j = 0; j < asf_st->span; j++) {
1410  if ((pos + chunk_len) >= asf_pkt->data_size)
1411  break;
1412  memcpy(pkt.data + pos,
1413  p + (j * nchunks + l) * chunk_len,
1414  chunk_len);
1415  pos += chunk_len;
1416  }
1417  }
1418  p += asf_st->span * pkt_len;
1419  if (p > asf_pkt->avpkt.data + asf_pkt->data_size)
1420  break;
1421  }
1422  av_packet_unref(&asf_pkt->avpkt);
1423  asf_pkt->avpkt = pkt;
1424 
1425  return 0;
1426 }
1427 
1429 {
1430  ASFContext *asf = s->priv_data;
1431  AVIOContext *pb = s->pb;
1432  int ret, i;
1433 
1434  if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1435  !(asf->b_flags & ASF_FLAG_BROADCAST))
1436  return AVERROR_EOF;
1437  while (!pb->eof_reached) {
1438  if (asf->state == PARSE_PACKET_HEADER) {
1440  if (pb->eof_reached)
1441  break;
1442  if (!asf->nb_mult_left)
1443  asf->state = READ_SINGLE;
1444  else
1445  asf->state = READ_MULTI;
1446  }
1447  ret = asf_read_payload(s, pkt);
1448  if (ret == AVERROR(EAGAIN)) {
1449  asf->state = PARSE_PACKET_HEADER;
1450  continue;
1451  }
1452  else if (ret < 0)
1453  return ret;
1454 
1455  switch (asf->state) {
1456  case READ_SINGLE:
1457  if (!asf->sub_left)
1458  asf->state = PARSE_PACKET_HEADER;
1459  break;
1460  case READ_MULTI_SUB:
1461  if (!asf->sub_left && !asf->nb_mult_left) {
1462  asf->state = PARSE_PACKET_HEADER;
1463  if (!asf->return_subpayload &&
1464  (avio_tell(pb) <= asf->packet_offset +
1465  asf->packet_size - asf->pad_len))
1466  avio_skip(pb, asf->pad_len); // skip padding
1467  if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1468  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1469  } else if (!asf->sub_left)
1470  asf->state = READ_MULTI;
1471  break;
1472  case READ_MULTI:
1473  if (!asf->nb_mult_left) {
1474  asf->state = PARSE_PACKET_HEADER;
1475  if (!asf->return_subpayload &&
1476  (avio_tell(pb) <= asf->packet_offset +
1477  asf->packet_size - asf->pad_len))
1478  avio_skip(pb, asf->pad_len); // skip padding
1479  if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1480  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1481  }
1482  break;
1483  }
1484  if (asf->return_subpayload) {
1485  asf->return_subpayload = 0;
1486  return 0;
1487  }
1488  for (i = 0; i < s->nb_streams; i++) {
1489  ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1490  if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1491  if (asf->asf_st[i]->span > 1 &&
1492  asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1493  if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1494  return ret;
1495  av_packet_move_ref(pkt, &asf_pkt->avpkt);
1496  pkt->stream_index = asf->asf_st[i]->index;
1497  pkt->flags = asf_pkt->flags;
1498  pkt->dts = asf_pkt->dts - asf->preroll;
1499  asf_pkt->data_size = 0;
1500  asf_pkt->frame_num = 0;
1501  return 0;
1502  }
1503  }
1504  }
1505 
1506  if (pb->eof_reached)
1507  return AVERROR_EOF;
1508 
1509  return 0;
1510 }
1511 
1513 {
1514  ASFContext *asf = s->priv_data;
1515  int i;
1516 
1517  for (i = 0; i < ASF_MAX_STREAMS; i++) {
1518  av_dict_free(&asf->asf_sd[i].asf_met);
1519  if (i < asf->nb_streams) {
1520  av_packet_unref(&asf->asf_st[i]->pkt.avpkt);
1521  av_freep(&asf->asf_st[i]);
1522  }
1523  }
1524 
1525  asf->nb_streams = 0;
1526  return 0;
1527 }
1528 
1530 {
1531  ASFContext *asf = s->priv_data;
1532  int i;
1533 
1534  asf->state = PARSE_PACKET_HEADER;
1535  asf->offset = 0;
1536  asf->return_subpayload = 0;
1537  asf->sub_left = 0;
1538  asf->sub_header_offset = 0;
1539  asf->packet_offset = asf->first_packet_offset;
1540  asf->pad_len = 0;
1541  asf->rep_data_len = 0;
1542  asf->dts_delta = 0;
1543  asf->mult_sub_len = 0;
1544  asf->nb_mult_left = 0;
1545  asf->nb_sub = 0;
1546  asf->prop_flags = 0;
1547  asf->sub_dts = 0;
1548  for (i = 0; i < asf->nb_streams; i++) {
1549  ASFPacket *pkt = &asf->asf_st[i]->pkt;
1550  pkt->size_left = 0;
1551  pkt->data_size = 0;
1552  pkt->duration = 0;
1553  pkt->flags = 0;
1554  pkt->dts = 0;
1555  pkt->duration = 0;
1556  av_packet_unref(&pkt->avpkt);
1557  av_init_packet(&pkt->avpkt);
1558  }
1559 }
1560 
1561 /*
1562  * Find a timestamp for the requested position within the payload
1563  * where the pos (position) is the offset inside the Data Object.
1564  * When position is not on the packet boundary, asf_read_timestamp tries
1565  * to find the closest packet offset after this position. If this packet
1566  * is a key frame, this packet timestamp is read and an index entry is created
1567  * for the packet. If this packet belongs to the requested stream,
1568  * asf_read_timestamp upgrades pos to the packet beginning offset and
1569  * returns this packet's dts. So returned dts is the dts of the first key frame with
1570  * matching stream number after given position.
1571  */
1572 static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1573  int64_t *pos, int64_t pos_limit)
1574 {
1575  ASFContext *asf = s->priv_data;
1576  int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1577  AVPacket pkt;
1578  int n;
1579 
1580  data_end = asf->data_offset + asf->data_size;
1581 
1582  n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1583  asf->packet_size;
1584  n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1585  pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1586 
1587  avio_seek(s->pb, pkt_pos, SEEK_SET);
1588  pkt_offset = pkt_pos;
1589 
1590  reset_packet_state(s);
1591  while (avio_tell(s->pb) < data_end) {
1592 
1593  int i, ret, st_found;
1594 
1595  av_init_packet(&pkt);
1596  pkt_offset = avio_tell(s->pb);
1597  if ((ret = asf_read_packet(s, &pkt)) < 0) {
1598  dts = AV_NOPTS_VALUE;
1599  return ret;
1600  }
1601  // ASFPacket may contain fragments of packets belonging to different streams,
1602  // pkt_offset is the offset of the first fragment within it.
1603  if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1604  pkt_pos += asf->packet_size;
1605  for (i = 0; i < asf->nb_streams; i++) {
1606  ASFStream *st = asf->asf_st[i];
1607 
1608  st_found = 0;
1609  if (pkt.flags & AV_PKT_FLAG_KEY) {
1610  dts = pkt.dts;
1611  if (dts) {
1612  av_add_index_entry(s->streams[pkt.stream_index], pkt_pos,
1613  dts, pkt.size, 0, AVINDEX_KEYFRAME);
1614  if (stream_index == st->index) {
1615  st_found = 1;
1616  break;
1617  }
1618  }
1619  }
1620  }
1621  if (st_found)
1622  break;
1623  av_packet_unref(&pkt);
1624  }
1625  *pos = pkt_pos;
1626 
1627  av_packet_unref(&pkt);
1628  return dts;
1629 }
1630 
1631 static int asf_read_seek(AVFormatContext *s, int stream_index,
1632  int64_t timestamp, int flags)
1633 {
1634  ASFContext *asf = s->priv_data;
1635  int idx, ret;
1636 
1637  if (s->streams[stream_index]->nb_index_entries && asf->is_simple_index) {
1638  idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
1639  if (idx < 0 || idx >= s->streams[stream_index]->nb_index_entries)
1640  return AVERROR_INVALIDDATA;
1641  avio_seek(s->pb, s->streams[stream_index]->index_entries[idx].pos, SEEK_SET);
1642  } else {
1643  if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1644  return ret;
1645  }
1646 
1647  reset_packet_state(s);
1648 
1649  return 0;
1650 }
1651 
1653 {
1654  int j, ret;
1655  const GUIDParseTable *g;
1656 
1657  swap_guid(guid);
1658  g = gdef;
1659  for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1660  if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1661  return g;
1662  g++;
1663  }
1664 
1665  return NULL;
1666 }
1667 
1668 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
1669 {
1670  ASFContext *asf = s->priv_data;
1671  AVIOContext *pb = s->pb;
1672  const GUIDParseTable *g = NULL;
1673  ff_asf_guid guid;
1674  int ret;
1675 
1676  while (avio_tell(pb) <= offset + size) {
1677  if (avio_tell(pb) == asf->offset)
1678  break;
1679  asf->offset = avio_tell(pb);
1680  if ((ret = ff_get_guid(pb, &guid)) < 0)
1681  return ret;
1682  g = find_guid(guid);
1683  if (g) {
1684  if ((ret = g->read_object(s, g)) < 0)
1685  return ret;
1686  } else {
1687  GUIDParseTable g2;
1688 
1689  g2.name = "Unknown";
1690  g2.is_subobject = 1;
1691  asf_read_unknown(s, &g2);
1692  }
1693  }
1694 
1695  return 0;
1696 }
1697 
1699 {
1700  ASFContext *asf = s->priv_data;
1701  AVIOContext *pb = s->pb;
1702  const GUIDParseTable *g = NULL;
1703  ff_asf_guid guid;
1704  int i, ret;
1705  uint64_t size;
1706 
1707  asf->preroll = 0;
1708  asf->is_simple_index = 0;
1709  ff_get_guid(pb, &guid);
1710  if (ff_guidcmp(&guid, &ff_asf_header))
1711  return AVERROR_INVALIDDATA;
1712  avio_skip(pb, 8); // skip header object size
1713  avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1714  asf->data_reached = 0;
1715 
1716  /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1717  * for the first time,
1718  * Index object is processed and got eof and then seeking back to the Data is performed.
1719  */
1720  while (1) {
1721  // for the cases when object size is invalid
1722  if (avio_tell(pb) == asf->offset)
1723  break;
1724  asf->offset = avio_tell(pb);
1725  if ((ret = ff_get_guid(pb, &guid)) < 0) {
1726  if (ret == AVERROR_EOF && asf->data_reached)
1727  break;
1728  else
1729  goto failed;
1730  }
1731  g = find_guid(guid);
1732  if (g) {
1733  asf->unknown_offset = asf->offset;
1734  asf->is_header = 1;
1735  if ((ret = g->read_object(s, g)) < 0)
1736  goto failed;
1737  } else {
1738  size = avio_rl64(pb);
1739  align_position(pb, asf->offset, size);
1740  }
1741  if (asf->data_reached && (!pb->seekable || (asf->b_flags & ASF_FLAG_BROADCAST)))
1742  break;
1743  }
1744 
1745  if (!asf->data_reached) {
1746  av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1747  ret = AVERROR_INVALIDDATA;
1748  goto failed;
1749  }
1750  if (pb->seekable)
1751  avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1752 
1753  for (i = 0; i < asf->nb_streams; i++) {
1754  const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1755  AVStream *st = s->streams[asf->asf_st[i]->index];
1756  set_language(s, rfc1766, &st->metadata);
1757  }
1758 
1759  for (i = 0; i < ASF_MAX_STREAMS; i++) {
1760  AVStream *st = NULL;
1761 
1762  st = find_stream(s, i);
1763  if (st) {
1765  if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1768  }
1769  }
1770  }
1771 
1772  return 0;
1773 
1774 failed:
1775  asf_read_close(s);
1776  return ret;
1777 }
1778 
1780  .name = "asf_o",
1781  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1782  .priv_data_size = sizeof(ASFContext),
1783  .read_probe = asf_probe,
1787  .read_timestamp = asf_read_timestamp,
1790 };
int nb_streams
Definition: asfdec_o.c:120
int data_reached
Definition: asfdec_o.c:95
const ff_asf_guid ff_asf_header
Definition: asf.c:23
static void swap_guid(ff_asf_guid guid)
Definition: asfdec_o.c:159
static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:839
#define NULL
Definition: coverity.c:32
#define AVFMT_NOBINSEARCH
Format does not allow to fall back on binary search via read_timestamp.
Definition: avformat.h:490
static int asf_read_close(AVFormatContext *s)
Definition: asfdec_o.c:1512
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define ASF_BYTE_ARRAY
Definition: asfdec_o.c:48
uint8_t stream_index
Definition: asfdec_o.c:77
static int asf_read_packet_header(AVFormatContext *s)
Definition: asfdec_o.c:1351
int64_t data_offset
Definition: asfdec_o.c:113
static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:173
#define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE
Definition: asf.h:137
static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
Definition: asfdec_o.c:167
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:1900
enum AVCodecID id
Definition: mxfenc.c:104
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2946
int size_left
Definition: asfdec_o.c:72
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
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:4427
const char * g
Definition: vf_curves.c:108
const char * desc
Definition: nvenc.c:89
int64_t pos
Definition: avformat.h:816
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
uint64_t data_offset
beginning of the first data packet
Definition: asfdec_f.c:85
int data_size
Definition: asfdec_o.c:70
static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:220
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3922
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: avcodec.h:1581
uint32_t packet_size
Definition: asfdec_o.c:101
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1085
uint16_t virtual_pkt_len
Definition: asfdec_o.c:82
#define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE
Definition: asf.h:153
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:216
const ff_asf_guid ff_asf_command_stream
Definition: asf.c:65
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
const char * name
Definition: asfdec_o.c:59
static void get_id3_tag(AVFormatContext *s, int len)
Definition: asfdec_o.c:458
#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:414
static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:722
static AVPacket pkt
#define ASF_UNICODE
Definition: asfdec_o.c:46
static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1146
ASFStreamData asf_sd[ASF_MAX_STREAMS]
Definition: asfdec_o.c:119
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:1078
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 return_subpayload
Definition: asfdec_o.c:138
static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:907
Macro definitions for various function/variable attributes.
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:4189
Format I/O context.
Definition: avformat.h:1325
static const GUIDParseTable * find_guid(ff_asf_guid guid)
Definition: asfdec_o.c:1652
char str[32]
Definition: internal.h:50
#define ASF_STREAM_NUM
Definition: asfdec_o.c:51
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:468
Public dictionary API.
static int64_t start_time
Definition: ffplay.c:330
static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:573
uint8_t
static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
Definition: asfdec_o.c:314
uint8_t stream_index
Definition: asfdec_o.c:73
static int nb_streams
Definition: ffprobe.c:254
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:195
int width
Video only.
Definition: avcodec.h:3988
const ff_asf_guid ff_asf_audio_stream
Definition: asf.c:39
static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type)
Definition: asfdec_o.c:553
int is_simple_index
Definition: asfdec_o.c:96
AVOptions.
uint8_t dts_delta
Definition: asfdec_o.c:127
#define BMP_HEADER_SIZE
Definition: asfdec_o.c:53
int id
Format-specific stream ID.
Definition: avformat.h:883
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4065
int64_t send_time
Definition: asfdec_o.c:102
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:933
uint8_t * data
Definition: avcodec.h:1580
int64_t offset
Definition: asfdec_o.c:111
int64_t packet_offset
Definition: asfdec_o.c:129
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:617
static void reset_packet_state(AVFormatContext *s)
Definition: asfdec_o.c:1529
uint32_t tag
Definition: movenc.c:1367
#define AVERROR_EOF
End of file.
Definition: error.h:55
enum AVCodecID id
Definition: internal.h:51
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
AVPacket pkt
Definition: asfdec_f.c:51
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:260
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
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:598
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:88
uint32_t pad_len
Definition: asfdec_o.c:130
AVRational aspect_ratio
Definition: asfdec_o.c:91
static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:620
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3951
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1612
#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:386
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
int16_t lang_idx
Definition: asfdec_o.c:84
#define AVINDEX_KEYFRAME
Definition: avformat.h:823
static int asf_probe(AVProbeData *pd)
Definition: asfdec_o.c:150
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:189
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:1539
int indexed
Definition: asfdec_o.c:80
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:1999
#define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE
Definition: asf.h:148
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:720
int type
Definition: asfdec_o.c:79
#define AVERROR(e)
Definition: error.h:43
#define ASF_QWORD
Definition: asfdec_o.c:45
const char * av_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
Convert a language code to a target codespace.
Definition: avlanguage.c:736
uint64_t preroll
Definition: asfdec_o.c:99
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
void ff_asfcrypt_dec(const uint8_t key[20], uint8_t *data, int len)
Definition: asfcrypt.c:147
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:202
static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:500
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3918
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1062
int64_t sub_dts
Definition: asfdec_o.c:126
int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riffdec.c:32
ff_asf_guid guid
Definition: asfdec_o.c:60
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:954
#define fail()
Definition: checkasm.h:81
int index
Definition: asfdec_o.c:78
enum ASFContext::@175 state
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
const char * ff_id3v2_picture_types[21]
Definition: id3v2.c:105
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1586
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3940
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:589
static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
Definition: asfdec_o.c:1386
#define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT
Definition: asf.h:127
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:129
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1381
static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1168
#define ASF_FLAG_BROADCAST
Definition: asfdec_o.c:47
static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1219
static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec_o.c:1271
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
static int asf_read_value(AVFormatContext *s, const uint8_t *name, uint16_t val_len, int type, AVDictionary **met)
Definition: asfdec_o.c:273
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
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:969
#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE
Definition: asfdec_o.c:56
#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:76
uint32_t frame_num
Definition: asfdec_o.c:68
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
AVInputFormat ff_asf_o_demuxer
Definition: asfdec_o.c:1779
int64_t dts
Definition: asfdec_o.c:67
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
ASFStream * asf_st
currently decoded stream
Definition: asfdec_f.c:112
static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
Definition: asfdec_o.c:203
uint64_t data_size
Definition: asfdec_o.c:108
#define ASF_WORD
Definition: asfdec_o.c:42
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
#define ASF_ERROR_CORRECTION_LENGTH_TYPE
Definition: asfdec_o.c:55
int32_t
#define READ_LEN(flag, name, len)
Definition: asfdec_o.c:1067
const ff_asf_guid ff_asf_ext_stream_embed_stream_header
Definition: asf.c:100
static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
Definition: asfdec_o.c:826
int n
Definition: avisynth_c.h:547
AVDictionary * metadata
Definition: avformat.h:945
static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index, int64_t *pos, int64_t pos_limit)
Definition: asfdec_o.c:1572
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:192
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: asfdec_o.c:1631
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:851
unsigned int nb_sub
Definition: asfdec_o.c:135
#define ASF_BOOL
Definition: asfdec_o.c:41
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
#define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT
Definition: asf.h:108
uint8_t ff_asf_guid[16]
Definition: riff.h:89
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define ASF_NUM_OF_PAYLOADS
Definition: asfdec_o.c:54
uint32_t rep_data_len
Definition: asfdec_o.c:131
uint32_t prop_flags
Definition: asfdec_o.c:106
AVPacket avpkt
Definition: asfdec_o.c:66
uint32_t packet_size_internal
Definition: asfdec_o.c:128
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
const ff_asf_guid ff_asf_video_stream
Definition: asf.c:53
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:563
static int asf_read_picture(AVFormatContext *s, int len)
Definition: asfdec_o.c:358
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:491
void * buf
Definition: avisynth_c.h:553
int64_t first_packet_offset
Definition: asfdec_o.c:114
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:69
int nb_index_entries
Definition: avformat.h:1087
static const GUIDParseTable gdef[]
Definition: asfdec_o.c:1017
AVDictionary * asf_met
Definition: asfdec_o.c:90
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec_o.c:1428
rational number numerator/denominator
Definition: rational.h:43
#define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE
Definition: asf.h:132
#define ASF_DWORD
Definition: asfdec_o.c:44
byte swapping routines
uint64_t sub_left
Definition: asfdec_o.c:134
uint64_t unknown_size
Definition: asfdec_o.c:109
AVMediaType
Definition: avutil.h:191
#define snprintf
Definition: snprintf.h:34
uint16_t mult_sub_len
Definition: asfdec_o.c:136
This structure contains the data a format has to probe a file.
Definition: avformat.h:459
uint32_t b_flags
Definition: asfdec_o.c:105
ASFPacket pkt
Definition: asfdec_o.c:85
static int64_t pts
Global timestamp for the audio frames.
int64_t unknown_offset
Definition: asfdec_o.c:115
static void reset_packet(ASFPacket *asf_pkt)
Definition: asfdec_o.c:1134
static int flags
Definition: cpu.c:47
int duration
Definition: asfdec_o.c:71
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
int is_header
Definition: asfdec_o.c:97
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:471
const uint8_t * key
Definition: avformat.h:1475
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:704
Main libavformat public API header.
#define ASF_MAX_STREAMS
Definition: asfdec_o.c:52
uint64_t sub_header_offset
Definition: asfdec_o.c:125
const ff_asf_guid ff_asf_jfif_media
Definition: asf.c:57
#define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE
Definition: asf.h:142
common internal and external API header
if(ret< 0)
Definition: vf_mcdeint.c:282
static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len, unsigned char *ch, uint16_t buflen)
Definition: asfdec_o.c:259
int is_subobject
Definition: asfdec_o.c:62
uint64_t nb_packets
how many packets are there in the file, invalid if broadcasting
Definition: asfdec_o.c:100
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:923
static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
Definition: asfdec_o.c:1079
#define ASF_GUID
Definition: asfdec_o.c:43
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
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 and chapters.
Definition: id3v2.c:1056
int(* read_object)(AVFormatContext *, const struct GUIDParseTable *)
Definition: asfdec_o.c:61
int den
denominator
Definition: rational.h:45
#define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE
Definition: asf.h:158
static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:649
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:731
int eof_reached
true if eof reached
Definition: avio.h:222
int len
static int asf_set_metadata(AVFormatContext *s, const uint8_t *name, int type, AVDictionary **met)
Definition: asfdec_o.c:337
static uint8_t tmp[8]
Definition: des.c:38
void * priv_data
Format private data.
Definition: avformat.h:1353
static AVStream * find_stream(AVFormatContext *s, uint16_t st_num)
Definition: asfdec_o.c:537
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3936
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1579
int duration
Definition: asfdec_o.c:103
uint64_t nb_mult_left
Definition: asfdec_o.c:137
char langs[32]
Definition: asfdec_o.c:89
int stream_index
Definition: asfdec_f.c:110
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
AVCodecParameters * codecpar
Definition: avformat.h:1006
static int parse_video_info(AVIOContext *pb, AVStream *st)
Definition: asfdec_o.c:692
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3926
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: avcodec.h:1582
int flags
Definition: asfdec_o.c:69
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:113
This structure stores compressed data.
Definition: avcodec.h:1557
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:728
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int8_t span
Definition: asfdec_o.c:81
uint16_t virtual_chunk_len
Definition: asfdec_o.c:83
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:963
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
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:2014
#define av_unused
Definition: attributes.h:126
const char * name
Definition: opengl_enc.c:103
static int asf_read_header(AVFormatContext *s)
Definition: asfdec_o.c:1698
static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
Definition: asfdec_o.c:1668