Libav
asfdec.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 Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
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 {
143  READ_MULTI_SUB
144  } state;
145 } ASFContext;
146 
147 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size);
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;
155  else
156  return 0;
157 }
158 
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 (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 
459 {
460  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
461 
462  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
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;
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);
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 
553 static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type)
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_asf; // ASF-specific Format Data size
695  uint32_t size_bmp; // BMP_HEADER-specific Format Data size
696  unsigned int tag;
697 
698  st->codecpar->width = avio_rl32(pb);
699  st->codecpar->height = avio_rl32(pb);
700  avio_skip(pb, 1); // skip reserved flags
701  size_asf = avio_rl16(pb);
702  tag = ff_get_bmp_header(pb, st, &size_bmp);
703  st->codecpar->codec_tag = tag;
705  size_bmp = FFMAX(size_asf, size_bmp);
706 
707  if (size_bmp > BMP_HEADER_SIZE) {
708  int ret;
709  st->codecpar->extradata_size = size_bmp - BMP_HEADER_SIZE;
712  st->codecpar->extradata_size = 0;
713  return AVERROR(ENOMEM);
714  }
715  memset(st->codecpar->extradata + st->codecpar->extradata_size , 0,
717  if ((ret = avio_read(pb, st->codecpar->extradata,
718  st->codecpar->extradata_size)) < 0)
719  return ret;
720  }
721  return 0;
722 }
723 
725 {
726  ASFContext *asf = s->priv_data;
727  AVIOContext *pb = s->pb;
728  uint64_t size;
729  uint32_t err_data_len, ts_data_len; // type specific data length
730  uint16_t flags;
731  ff_asf_guid stream_type;
732  enum AVMediaType type;
733  int i, ret;
734  uint8_t stream_index;
735  AVStream *st;
736  ASFStream *asf_st;
737 
738  // ASF file must not contain more than 128 streams according to the specification
739  if (asf->nb_streams >= ASF_MAX_STREAMS)
740  return AVERROR_INVALIDDATA;
741 
742  size = avio_rl64(pb);
743  ff_get_guid(pb, &stream_type);
744  if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
745  type = AVMEDIA_TYPE_AUDIO;
746  else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
747  type = AVMEDIA_TYPE_VIDEO;
748  else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
749  type = AVMEDIA_TYPE_VIDEO;
750  else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
751  type = AVMEDIA_TYPE_DATA;
752  else if (!ff_guidcmp(&stream_type,
754  type = AVMEDIA_TYPE_UNKNOWN;
755  else
756  return AVERROR_INVALIDDATA;
757 
758  ff_get_guid(pb, &stream_type); // error correction type
759  avio_skip(pb, 8); // skip the time offset
760  ts_data_len = avio_rl32(pb);
761  err_data_len = avio_rl32(pb);
762  flags = avio_rl16(pb); // bit 15 - Encrypted Content
763 
764  stream_index = flags & ASF_STREAM_NUM;
765  for (i = 0; i < asf->nb_streams; i++)
766  if (stream_index == asf->asf_st[i]->stream_index) {
768  "Duplicate stream found, this stream will be ignored.\n");
769  align_position(pb, asf->offset, size);
770  return 0;
771  }
772 
773  st = avformat_new_stream(s, NULL);
774  if (!st)
775  return AVERROR(ENOMEM);
776  avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
777  st->codecpar->codec_type = type;
778  asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
779  if (!asf->asf_st[asf->nb_streams])
780  return AVERROR(ENOMEM);
781  asf_st = asf->asf_st[asf->nb_streams];
782  asf->nb_streams++;
783  asf_st->stream_index = stream_index;
784  asf_st->index = st->index;
785  asf_st->indexed = 0;
786  st->id = flags & ASF_STREAM_NUM;
787  av_init_packet(&asf_st->pkt.avpkt);
788  asf_st->pkt.data_size = 0;
789  avio_skip(pb, 4); // skip reserved field
790 
791  switch (type) {
792  case AVMEDIA_TYPE_AUDIO:
793  asf_st->type = AVMEDIA_TYPE_AUDIO;
794  if ((ret = ff_get_wav_header(s, pb, st->codecpar, ts_data_len)) < 0)
795  return ret;
796  break;
797  case AVMEDIA_TYPE_VIDEO:
798  asf_st->type = AVMEDIA_TYPE_VIDEO;
799  if ((ret = parse_video_info(pb, st)) < 0)
800  return ret;
801  break;
802  default:
803  avio_skip(pb, ts_data_len);
804  break;
805  }
806 
807  if (err_data_len) {
808  if (type == AVMEDIA_TYPE_AUDIO) {
809  uint8_t span = avio_r8(pb);
810  if (span > 1) {
811  asf_st->span = span;
812  asf_st->virtual_pkt_len = avio_rl16(pb);
813  asf_st->virtual_chunk_len = avio_rl16(pb);
814  if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
815  return AVERROR_INVALIDDATA;
816  avio_skip(pb, err_data_len - 5);
817  } else
818  avio_skip(pb, err_data_len - 1);
819  } else
820  avio_skip(pb, err_data_len);
821  }
822 
823  align_position(pb, asf->offset, size);
824 
825  return 0;
826 }
827 
828 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
829 {
830  // language abbr should contain at least 2 chars
831  if (rfc1766 && strlen(rfc1766) > 1) {
832  const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
833  const char *iso6392 = av_convert_lang_to(primary_tag,
835  if (iso6392)
836  if (av_dict_set(met, "language", iso6392, 0) < 0)
837  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
838  }
839 }
840 
842 {
843  ASFContext *asf = s->priv_data;
844  AVIOContext *pb = s->pb;
845  AVStream *st = NULL;
847  uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
848  int i, ret;
849  uint32_t bitrate;
850  uint64_t start_time, end_time, time_per_frame;
851  uint64_t size = avio_rl64(pb);
852 
853  start_time = avio_rl64(pb);
854  end_time = avio_rl64(pb);
855  bitrate = avio_rl32(pb);
856  avio_skip(pb, 28); // skip some unused values
857  st_num = avio_rl16(pb);
858  st_num &= ASF_STREAM_NUM;
859  lang_idx = avio_rl16(pb); // Stream Language ID Index
860  for (i = 0; i < asf->nb_streams; i++) {
861  if (st_num == asf->asf_st[i]->stream_index) {
862  st = s->streams[asf->asf_st[i]->index];
863  asf->asf_st[i]->lang_idx = lang_idx;
864  break;
865  }
866  }
867  time_per_frame = avio_rl64(pb); // average time per frame
868  if (st) {
869  st->start_time = start_time;
870  st->duration = end_time - start_time;
871  st->codecpar->bit_rate = bitrate;
872  st->avg_frame_rate.num = 10000000;
873  st->avg_frame_rate.den = time_per_frame;
874  }
875  nb_st_name = avio_rl16(pb);
876  nb_pay_exts = avio_rl16(pb);
877  for (i = 0; i < nb_st_name; i++) {
878  uint16_t len;
879 
880  avio_rl16(pb); // Language ID Index
881  len = avio_rl16(pb);
882  avio_skip(pb, len);
883  }
884 
885  for (i = 0; i < nb_pay_exts; i++) {
886  uint32_t len;
887  avio_skip(pb, 16); // Extension System ID
888  avio_skip(pb, 2); // Extension Data Size
889  len = avio_rl32(pb);
890  avio_skip(pb, len);
891  }
892 
893  if ((ret = ff_get_guid(pb, &guid)) < 0) {
894  align_position(pb, asf->offset, size);
895 
896  return 0;
897  }
898 
899  g = find_guid(guid);
900  if (g && !(strcmp(g->name, "Stream Properties"))) {
901  if ((ret = g->read_object(s, g)) < 0)
902  return ret;
903  }
904 
905  align_position(pb, asf->offset, size);
906  return 0;
907 }
908 
910 {
911  ASFContext *asf = s->priv_data;
912  AVIOContext *pb = s->pb;
913  int i, ret;
914  uint64_t size = avio_rl64(pb);
915  uint16_t nb_langs = avio_rl16(pb);
916 
917  if (nb_langs < ASF_MAX_STREAMS) {
918  for (i = 0; i < nb_langs; i++) {
919  size_t len;
920  len = avio_r8(pb);
921  if (!len)
922  len = 6;
923  if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
924  sizeof(asf->asf_sd[i].langs))) < 0) {
925  return ret;
926  }
927  }
928  }
929 
930  align_position(pb, asf->offset, size);
931  return 0;
932 }
933 
934 // returns data object offset when reading this object for the first time
936 {
937  ASFContext *asf = s->priv_data;
938  AVIOContext *pb = s->pb;
939  uint64_t size = asf->data_size = avio_rl64(pb);
940  int i;
941 
942  if (!asf->data_reached) {
943  asf->data_reached = 1;
944  asf->data_offset = asf->offset;
945  }
946 
947  for (i = 0; i < asf->nb_streams; i++) {
948  if (!(asf->b_flags & ASF_FLAG_BROADCAST))
949  s->streams[i]->duration = asf->duration;
950  }
951  asf->nb_mult_left = 0;
952  asf->sub_left = 0;
953  asf->state = PARSE_PACKET_HEADER;
954  asf->return_subpayload = 0;
955  asf->packet_size_internal = 0;
956  avio_skip(pb, 16); // skip File ID
957  size = avio_rl64(pb); // Total Data Packets
958  if (size != asf->nb_packets)
960  "Number of Packets from File Properties Object is not equal to Total"
961  "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
962  size, asf->nb_packets);
963  avio_skip(pb, 2); // skip reserved field
964  asf->first_packet_offset = avio_tell(pb);
965  if (pb->seekable && !(asf->b_flags & ASF_FLAG_BROADCAST))
966  align_position(pb, asf->offset, asf->data_size);
967 
968  return 0;
969 }
970 
972 {
973  ASFContext *asf = s->priv_data;
974  AVIOContext *pb = s->pb;
975  AVStream *st = NULL;
976  uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
977  uint32_t pkt_num, nb_entries;
978  int32_t prev_pkt_num = -1;
979  int i;
980  int64_t offset;
981  uint64_t size = avio_rl64(pb);
982 
983  // simple index objects should be ordered by stream number, this loop tries to find
984  // the first not indexed video stream
985  for (i = 0; i < asf->nb_streams; i++) {
986  if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
987  asf->asf_st[i]->indexed = 1;
988  st = s->streams[asf->asf_st[i]->index];
989  break;
990  }
991  }
992  if (!st) {
993  avio_skip(pb, size - 24); // if there's no video stream, skip index object
994  return 0;
995  }
996  avio_skip(pb, 16); // skip File ID
997  interval = avio_rl64(pb);
998  avio_skip(pb, 4);
999  nb_entries = avio_rl32(pb);
1000  for (i = 0; i < nb_entries; i++) {
1001  pkt_num = avio_rl32(pb);
1002  offset = avio_skip(pb, 2);
1003  if (offset < 0) {
1004  av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
1005  return offset;
1006  }
1007  if (prev_pkt_num != pkt_num) {
1009  pkt_num, av_rescale(interval, i, 10000),
1010  asf->packet_size, 0, AVINDEX_KEYFRAME);
1011  prev_pkt_num = pkt_num;
1012  }
1013  }
1014  asf->is_simple_index = 1;
1015  align_position(pb, asf->offset, size);
1016 
1017  return 0;
1018 }
1019 
1020 static const GUIDParseTable gdef[] = {
1021  { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
1022  { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
1023  { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
1024  { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
1025  { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
1026  { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
1027  { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
1028  { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
1029  { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1030  { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
1031  { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1032  { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
1033  { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
1034  { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1035  { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
1036  { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1037  { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
1038  { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
1039  { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1040  { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
1041  { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1042  { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1043  { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
1044  { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1045  { "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 },
1046  { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
1047  { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
1048  { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
1049  { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1050  { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
1051  { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
1052  { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
1053  { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1054  { "Content Encryption System Windows Media DRM Network Devices",
1055  { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
1056  { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1057  { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1058  { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1059  { "Bandwith Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1060  { "Bandwith Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1061  { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
1062  { "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 },
1063  { "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 },
1064  { "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 },
1065  { "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 },
1066  { "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 },
1067  { "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 },
1068 };
1069 
1070 #define READ_LEN(flag, name, len) \
1071  do { \
1072  if ((flag) == name ## IS_BYTE) \
1073  len = avio_r8(pb); \
1074  else if ((flag) == name ## IS_WORD) \
1075  len = avio_rl16(pb); \
1076  else if ((flag) == name ## IS_DWORD) \
1077  len = avio_rl32(pb); \
1078  else \
1079  len = 0; \
1080  } while(0)
1081 
1082 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
1083 {
1084  ASFContext *asf = s->priv_data;
1085  AVIOContext *pb = s->pb;
1086  uint8_t sub_len;
1087  int ret, i;
1088 
1089  if (is_header) {
1090  asf->dts_delta = avio_r8(pb);
1091  if (asf->nb_mult_left) {
1092  asf->mult_sub_len = avio_rl16(pb); // total
1093  }
1094  asf->sub_header_offset = avio_tell(pb);
1095  asf->nb_sub = 0;
1096  asf->sub_left = 1;
1097  }
1098  sub_len = avio_r8(pb);
1099  if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
1100  return ret;
1101  for (i = 0; i < asf->nb_streams; i++) {
1102  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1103  pkt->stream_index = asf->asf_st[i]->index;
1104  break;
1105  }
1106  }
1107  asf->return_subpayload = 1;
1108  if (!sub_len)
1109  asf->return_subpayload = 0;
1110 
1111  if (sub_len)
1112  asf->nb_sub++;
1113  pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1114  if (asf->nb_mult_left && (avio_tell(pb) >=
1115  (asf->sub_header_offset + asf->mult_sub_len))) {
1116  asf->sub_left = 0;
1117  asf->nb_mult_left--;
1118  }
1119  if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1120  asf->sub_left = 0;
1121  if (!asf->nb_mult_left) {
1122  avio_skip(pb, asf->pad_len);
1123  if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1124  if (!asf->packet_size)
1125  return AVERROR_INVALIDDATA;
1127  "Position %"PRId64" wrong, should be %"PRId64"\n",
1128  avio_tell(pb), asf->packet_offset + asf->packet_size);
1129  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1130  }
1131  }
1132  }
1133 
1134  return 0;
1135 }
1136 
1137 static void reset_packet(ASFPacket *asf_pkt)
1138 {
1139  asf_pkt->size_left = 0;
1140  asf_pkt->data_size = 0;
1141  asf_pkt->duration = 0;
1142  asf_pkt->flags = 0;
1143  asf_pkt->dts = 0;
1144  asf_pkt->duration = 0;
1145  av_packet_unref(&asf_pkt->avpkt);
1146  av_init_packet(&asf_pkt->avpkt);
1147 }
1148 
1150 {
1151  ASFContext *asf = s->priv_data;
1152  AVIOContext *pb = s->pb;
1153  int ret, data_size;
1154 
1155  if (!asf_pkt->data_size) {
1156  data_size = avio_rl32(pb); // read media object size
1157  if (data_size <= 0)
1158  return AVERROR_INVALIDDATA;
1159  if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1160  return ret;
1161  asf_pkt->data_size = asf_pkt->size_left = data_size;
1162  } else
1163  avio_skip(pb, 4); // reading of media object size is already done
1164  asf_pkt->dts = avio_rl32(pb); // read presentation time
1165  if (asf->rep_data_len && (asf->rep_data_len >= 8))
1166  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1167 
1168  return 0;
1169 }
1170 
1172  ASFPacket *asf_pkt)
1173 {
1174  ASFContext *asf = s->priv_data;
1175  AVIOContext *pb = s->pb;
1176  uint16_t pay_len;
1177  unsigned char *p;
1178  int ret;
1179  int skip = 0;
1180 
1181  // if replicated length is 1, subpayloads are present
1182  if (asf->rep_data_len == 1) {
1183  asf->sub_left = 1;
1184  asf->state = READ_MULTI_SUB;
1185  pkt->flags = asf_pkt->flags;
1186  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1187  return ret;
1188  } else {
1189  if (asf->rep_data_len)
1190  if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1191  return ret;
1192  pay_len = avio_rl16(pb); // payload length should be WORD
1193  if (pay_len > asf->packet_size) {
1194  av_log(s, AV_LOG_ERROR,
1195  "Error: invalid data packet size, pay_len %"PRIu16", "
1196  "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1197  pay_len, asf->packet_size, avio_tell(pb));
1198  return AVERROR_INVALIDDATA;
1199  }
1200  p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1201  if (pay_len > asf_pkt->size_left) {
1202  av_log(s, AV_LOG_ERROR,
1203  "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1204  pay_len, asf_pkt->size_left);
1205  skip = pay_len - asf_pkt->size_left;
1206  pay_len = asf_pkt->size_left;
1207  }
1208  if (asf_pkt->size_left <= 0)
1209  return AVERROR_INVALIDDATA;
1210  if ((ret = avio_read(pb, p, pay_len)) < 0)
1211  return ret;
1212  if (s->key && s->keylen == 20)
1213  ff_asfcrypt_dec(s->key, p, ret);
1214  avio_skip(pb, skip);
1215  asf_pkt->size_left -= pay_len;
1216  asf->nb_mult_left--;
1217  }
1218 
1219  return 0;
1220 }
1221 
1223 {
1224  ASFContext *asf = s->priv_data;
1225  AVIOContext *pb = s->pb;
1226  int64_t offset;
1227  uint64_t size;
1228  unsigned char *p;
1229  int ret, data_size;
1230 
1231  if (!asf_pkt->data_size) {
1232  data_size = avio_rl32(pb); // read media object size
1233  if (data_size <= 0)
1234  return AVERROR_EOF;
1235  if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1236  return ret;
1237  asf_pkt->data_size = asf_pkt->size_left = data_size;
1238  } else
1239  avio_skip(pb, 4); // skip media object size
1240  asf_pkt->dts = avio_rl32(pb); // read presentation time
1241  if (asf->rep_data_len >= 8)
1242  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1243  offset = avio_tell(pb);
1244 
1245  // size of the payload - size of the packet without header and padding
1246  if (asf->packet_size_internal)
1247  size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1248  else
1249  size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1250  if (size > asf->packet_size) {
1251  av_log(s, AV_LOG_ERROR,
1252  "Error: invalid data packet size, offset %"PRId64".\n",
1253  avio_tell(pb));
1254  return AVERROR_INVALIDDATA;
1255  }
1256  p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1257  if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1258  return AVERROR_INVALIDDATA;
1259  if (asf_pkt->size_left > size)
1260  asf_pkt->size_left -= size;
1261  else
1262  asf_pkt->size_left = 0;
1263  if ((ret = avio_read(pb, p, size)) < 0)
1264  return ret;
1265  if (s->key && s->keylen == 20)
1266  ff_asfcrypt_dec(s->key, p, ret);
1267  if (asf->packet_size_internal)
1268  avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1269  avio_skip(pb, asf->pad_len); // skip padding
1270 
1271  return 0;
1272 }
1273 
1275 {
1276  ASFContext *asf = s->priv_data;
1277  AVIOContext *pb = s->pb;
1278  int ret, i;
1279  ASFPacket *asf_pkt = NULL;
1280 
1281  if (!asf->sub_left) {
1282  uint32_t off_len, media_len;
1283  uint8_t stream_num;
1284 
1285  stream_num = avio_r8(pb);
1286  asf->stream_index = stream_num & ASF_STREAM_NUM;
1287  for (i = 0; i < asf->nb_streams; i++) {
1288  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1289  asf_pkt = &asf->asf_st[i]->pkt;
1290  asf_pkt->stream_index = asf->asf_st[i]->index;
1291  break;
1292  }
1293  }
1294  if (!asf_pkt) {
1295  if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1296  if (!asf->packet_size) {
1297  av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1298  return AVERROR_INVALIDDATA;
1299  }
1300  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1301  av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1302  asf->stream_index);
1303  return AVERROR(EAGAIN);
1304  } else
1305  return AVERROR_INVALIDDATA;
1306  }
1307 
1308  if (stream_num >> 7)
1309  asf_pkt->flags |= AV_PKT_FLAG_KEY;
1311  ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1313  ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1315  ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1316  if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1317  av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1318  reset_packet(asf_pkt);
1319  }
1320  asf_pkt->frame_num = media_len;
1321  asf->sub_dts = off_len;
1322  if (asf->nb_mult_left) {
1323  if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1324  return ret;
1325  } else if (asf->rep_data_len == 1) {
1326  asf->sub_left = 1;
1327  asf->state = READ_SINGLE;
1328  pkt->flags = asf_pkt->flags;
1329  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1330  return ret;
1331  } else {
1332  if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1333  return ret;
1334  }
1335  } else {
1336  for (i = 0; i <= asf->nb_streams; i++) {
1337  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1338  asf_pkt = &asf->asf_st[i]->pkt;
1339  break;
1340  }
1341  }
1342  if (!asf_pkt)
1343  return AVERROR_INVALIDDATA;
1344  pkt->flags = asf_pkt->flags;
1345  pkt->dts = asf_pkt->dts;
1346  pkt->stream_index = asf->asf_st[i]->index;
1347  if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1348  return ret;
1349  }
1350 
1351  return 0;
1352 }
1353 
1355 {
1356  ASFContext *asf = s->priv_data;
1357  AVIOContext *pb = s->pb;
1358  uint64_t size;
1359  uint32_t av_unused seq;
1360  unsigned char error_flags, len_flags, pay_flags;
1361 
1362  asf->packet_offset = avio_tell(pb);
1363  error_flags = avio_r8(pb); // read Error Correction Flags
1364  if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1365  if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1366  size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1367  avio_skip(pb, size);
1368  }
1369  len_flags = avio_r8(pb);
1370  } else
1371  len_flags = error_flags;
1372  asf->prop_flags = avio_r8(pb);
1374  ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1376  ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1378  ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1379  asf->send_time = avio_rl32(pb); // send time
1380  avio_skip(pb, 2); // skip duration
1381  if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1382  pay_flags = avio_r8(pb);
1383  asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1384  }
1385 
1386  return 0;
1387 }
1388 
1389 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1390 {
1391  ASFContext *asf = s->priv_data;
1392  ASFStream *asf_st = asf->asf_st[st_num];
1393  unsigned char *p = asf_pkt->avpkt.data;
1394  uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1395  uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1396  int nchunks = pkt_len / chunk_len;
1397  AVPacket pkt;
1398  int pos = 0, j, l, ret;
1399 
1400 
1401  if ((ret = av_new_packet(&pkt, asf_pkt->data_size)) < 0)
1402  return ret;
1403 
1404  while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1405  if (pos >= asf_pkt->data_size) {
1406  break;
1407  }
1408  for (l = 0; l < pkt_len; l++) {
1409  if (pos >= asf_pkt->data_size) {
1410  break;
1411  }
1412  for (j = 0; j < asf_st->span; j++) {
1413  if ((pos + chunk_len) >= asf_pkt->data_size)
1414  break;
1415  memcpy(pkt.data + pos,
1416  p + (j * nchunks + l) * chunk_len,
1417  chunk_len);
1418  pos += chunk_len;
1419  }
1420  }
1421  p += asf_st->span * pkt_len;
1422  if (p > asf_pkt->avpkt.data + asf_pkt->data_size)
1423  break;
1424  }
1425  av_packet_unref(&asf_pkt->avpkt);
1426  asf_pkt->avpkt = pkt;
1427 
1428  return 0;
1429 }
1430 
1432 {
1433  ASFContext *asf = s->priv_data;
1434  AVIOContext *pb = s->pb;
1435  int ret, i;
1436 
1437  if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1438  !(asf->b_flags & ASF_FLAG_BROADCAST))
1439  return AVERROR_EOF;
1440  while (!pb->eof_reached) {
1441  if (asf->state == PARSE_PACKET_HEADER) {
1443  if (pb->eof_reached)
1444  break;
1445  if (!asf->nb_mult_left)
1446  asf->state = READ_SINGLE;
1447  else
1448  asf->state = READ_MULTI;
1449  }
1450  ret = asf_read_payload(s, pkt);
1451  if (ret == AVERROR(EAGAIN)) {
1452  asf->state = PARSE_PACKET_HEADER;
1453  continue;
1454  }
1455  else if (ret < 0)
1456  return ret;
1457 
1458  switch (asf->state) {
1459  case READ_SINGLE:
1460  if (!asf->sub_left)
1461  asf->state = PARSE_PACKET_HEADER;
1462  break;
1463  case READ_MULTI_SUB:
1464  if (!asf->sub_left && !asf->nb_mult_left) {
1465  asf->state = PARSE_PACKET_HEADER;
1466  if (!asf->return_subpayload &&
1467  (avio_tell(pb) <= asf->packet_offset +
1468  asf->packet_size - asf->pad_len))
1469  avio_skip(pb, asf->pad_len); // skip padding
1470  if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1471  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1472  } else if (!asf->sub_left)
1473  asf->state = READ_MULTI;
1474  break;
1475  case READ_MULTI:
1476  if (!asf->nb_mult_left) {
1477  asf->state = PARSE_PACKET_HEADER;
1478  if (!asf->return_subpayload &&
1479  (avio_tell(pb) <= asf->packet_offset +
1480  asf->packet_size - asf->pad_len))
1481  avio_skip(pb, asf->pad_len); // skip padding
1482  if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1483  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1484  }
1485  break;
1486  }
1487  if (asf->return_subpayload) {
1488  asf->return_subpayload = 0;
1489  return 0;
1490  }
1491  for (i = 0; i < asf->nb_streams; i++) {
1492  ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1493  if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1494  if (asf->asf_st[i]->span > 1 &&
1495  asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1496  if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1497  return ret;
1498  av_packet_move_ref(pkt, &asf_pkt->avpkt);
1499  pkt->stream_index = asf->asf_st[i]->index;
1500  pkt->flags = asf_pkt->flags;
1501  pkt->dts = asf_pkt->dts - asf->preroll;
1502  asf_pkt->data_size = 0;
1503  asf_pkt->frame_num = 0;
1504  return 0;
1505  }
1506  }
1507  }
1508 
1509  if (pb->eof_reached)
1510  return AVERROR_EOF;
1511 
1512  return 0;
1513 }
1514 
1516 {
1517  ASFContext *asf = s->priv_data;
1518  int i;
1519 
1520  for (i = 0; i < ASF_MAX_STREAMS; i++) {
1521  av_dict_free(&asf->asf_sd[i].asf_met);
1522  if (i < asf->nb_streams) {
1523  av_packet_unref(&asf->asf_st[i]->pkt.avpkt);
1524  av_freep(&asf->asf_st[i]);
1525  }
1526  }
1527 
1528  asf->nb_streams = 0;
1529  return 0;
1530 }
1531 
1533 {
1534  ASFContext *asf = s->priv_data;
1535  int i;
1536 
1537  asf->state = PARSE_PACKET_HEADER;
1538  asf->offset = 0;
1539  asf->return_subpayload = 0;
1540  asf->sub_left = 0;
1541  asf->sub_header_offset = 0;
1542  asf->packet_offset = asf->first_packet_offset;
1543  asf->pad_len = 0;
1544  asf->rep_data_len = 0;
1545  asf->dts_delta = 0;
1546  asf->mult_sub_len = 0;
1547  asf->nb_mult_left = 0;
1548  asf->nb_sub = 0;
1549  asf->prop_flags = 0;
1550  asf->sub_dts = 0;
1551  for (i = 0; i < asf->nb_streams; i++) {
1552  ASFPacket *pkt = &asf->asf_st[i]->pkt;
1553  pkt->size_left = 0;
1554  pkt->data_size = 0;
1555  pkt->duration = 0;
1556  pkt->flags = 0;
1557  pkt->dts = 0;
1558  pkt->duration = 0;
1559  av_packet_unref(&pkt->avpkt);
1560  av_init_packet(&pkt->avpkt);
1561  }
1562 }
1563 
1564 /*
1565  * Find a timestamp for the requested position within the payload
1566  * where the pos (position) is the offset inside the Data Object.
1567  * When position is not on the packet boundary, asf_read_timestamp tries
1568  * to find the closest packet offset after this position. If this packet
1569  * is a key frame, this packet timestamp is read and an index entry is created
1570  * for the packet. If this packet belongs to the requested stream,
1571  * asf_read_timestamp upgrades pos to the packet beginning offset and
1572  * returns this packet's dts. So returned dts is the dts of the first key frame with
1573  * matching stream number after given position.
1574  */
1575 static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1576  int64_t *pos, int64_t pos_limit)
1577 {
1578  ASFContext *asf = s->priv_data;
1579  int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1580  AVPacket pkt;
1581  int n;
1582 
1583  data_end = asf->data_offset + asf->data_size;
1584 
1585  n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1586  asf->packet_size;
1587  n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1588  pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1589 
1590  avio_seek(s->pb, pkt_pos, SEEK_SET);
1591  pkt_offset = pkt_pos;
1592 
1593  reset_packet_state(s);
1594  while (avio_tell(s->pb) < data_end) {
1595 
1596  int i, ret, st_found;
1597 
1598  av_init_packet(&pkt);
1599  pkt_offset = avio_tell(s->pb);
1600  if ((ret = asf_read_packet(s, &pkt)) < 0) {
1601  dts = AV_NOPTS_VALUE;
1602  return ret;
1603  }
1604  // ASFPacket may contain fragments of packets belonging to different streams,
1605  // pkt_offset is the offset of the first fragment within it.
1606  if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1607  pkt_pos += asf->packet_size;
1608  for (i = 0; i < asf->nb_streams; i++) {
1609  ASFStream *st = asf->asf_st[i];
1610 
1611  st_found = 0;
1612  if (pkt.flags & AV_PKT_FLAG_KEY) {
1613  dts = pkt.dts;
1614  if (dts) {
1615  av_add_index_entry(s->streams[pkt.stream_index], pkt_pos,
1616  dts, pkt.size, 0, AVINDEX_KEYFRAME);
1617  if (stream_index == st->index) {
1618  st_found = 1;
1619  break;
1620  }
1621  }
1622  }
1623  }
1624  if (st_found)
1625  break;
1626  av_packet_unref(&pkt);
1627  }
1628  *pos = pkt_pos;
1629 
1630  av_packet_unref(&pkt);
1631  return dts;
1632 }
1633 
1634 static int asf_read_seek(AVFormatContext *s, int stream_index,
1635  int64_t timestamp, int flags)
1636 {
1637  ASFContext *asf = s->priv_data;
1638  int idx, ret;
1639 
1640  if (s->streams[stream_index]->nb_index_entries && asf->is_simple_index) {
1641  idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
1642  if (idx < 0 || idx >= s->streams[stream_index]->nb_index_entries)
1643  return AVERROR_INVALIDDATA;
1644  avio_seek(s->pb, s->streams[stream_index]->index_entries[idx].pos, SEEK_SET);
1645  } else {
1646  if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1647  return ret;
1648  }
1649 
1650  reset_packet_state(s);
1651 
1652  return 0;
1653 }
1654 
1656 {
1657  int j, ret;
1658  const GUIDParseTable *g;
1659 
1660  swap_guid(guid);
1661  g = gdef;
1662  for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1663  if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1664  return g;
1665  g++;
1666  }
1667 
1668  return NULL;
1669 }
1670 
1671 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
1672 {
1673  ASFContext *asf = s->priv_data;
1674  AVIOContext *pb = s->pb;
1675  const GUIDParseTable *g = NULL;
1676  ff_asf_guid guid;
1677  int ret;
1678 
1679  while (avio_tell(pb) <= offset + size) {
1680  if (avio_tell(pb) == asf->offset)
1681  break;
1682  asf->offset = avio_tell(pb);
1683  if ((ret = ff_get_guid(pb, &guid)) < 0)
1684  return ret;
1685  g = find_guid(guid);
1686  if (g) {
1687  if ((ret = g->read_object(s, g)) < 0)
1688  return ret;
1689  } else {
1690  GUIDParseTable g2;
1691 
1692  g2.name = "Unknown";
1693  g2.is_subobject = 1;
1694  asf_read_unknown(s, &g2);
1695  }
1696  }
1697 
1698  return 0;
1699 }
1700 
1702 {
1703  ASFContext *asf = s->priv_data;
1704  AVIOContext *pb = s->pb;
1705  const GUIDParseTable *g = NULL;
1706  ff_asf_guid guid;
1707  int i, ret;
1708  uint64_t size;
1709 
1710  asf->preroll = 0;
1711  asf->is_simple_index = 0;
1712  ff_get_guid(pb, &guid);
1713  if (ff_guidcmp(&guid, &ff_asf_header))
1714  return AVERROR_INVALIDDATA;
1715  avio_skip(pb, 8); // skip header object size
1716  avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1717  asf->data_reached = 0;
1718 
1719  /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1720  * for the first time,
1721  * Index object is processed and got eof and then seeking back to the Data is performed.
1722  */
1723  while (1) {
1724  // for the cases when object size is invalid
1725  if (avio_tell(pb) == asf->offset)
1726  break;
1727  asf->offset = avio_tell(pb);
1728  if ((ret = ff_get_guid(pb, &guid)) < 0) {
1729  if (ret == AVERROR_EOF && asf->data_reached)
1730  break;
1731  else
1732  goto failed;
1733  }
1734  g = find_guid(guid);
1735  if (g) {
1736  asf->unknown_offset = asf->offset;
1737  asf->is_header = 1;
1738  if ((ret = g->read_object(s, g)) < 0)
1739  goto failed;
1740  } else {
1741  size = avio_rl64(pb);
1742  align_position(pb, asf->offset, size);
1743  }
1744  if (asf->data_reached && (!pb->seekable || (asf->b_flags & ASF_FLAG_BROADCAST)))
1745  break;
1746  }
1747 
1748  if (!asf->data_reached) {
1749  av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1750  ret = AVERROR_INVALIDDATA;
1751  goto failed;
1752  }
1753  if (pb->seekable)
1754  avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1755 
1756  for (i = 0; i < asf->nb_streams; i++) {
1757  const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1758  AVStream *st = s->streams[asf->asf_st[i]->index];
1759  set_language(s, rfc1766, &st->metadata);
1760  }
1761 
1762  for (i = 0; i < ASF_MAX_STREAMS; i++) {
1763  AVStream *st = NULL;
1764 
1765  st = find_stream(s, i);
1766  if (st) {
1768  if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1771  }
1772  }
1773  }
1774 
1775  return 0;
1776 
1777 failed:
1778  asf_read_close(s);
1779  return ret;
1780 }
1781 
1783  .name = "asf",
1784  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1785  .priv_data_size = sizeof(ASFContext),
1786  .read_probe = asf_probe,
1790  .read_timestamp = asf_read_timestamp,
1793 };
int nb_streams
Definition: asfdec.c:120
int data_reached
Definition: asfdec.c:95
const ff_asf_guid ff_asf_header
Definition: asf.c:23
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
#define AVFMT_NOBINSEARCH
Format does not allow to fall back on binary search via read_timestamp.
Definition: avformat.h:426
Bytestream IO Context.
Definition: avio.h:104
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
uint8_t stream_index
Definition: asfdec.c:77
int size
int64_t data_offset
Definition: asfdec.c:113
#define ASF_BOOL
Definition: asfdec.c:41
#define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE
Definition: asf.h:126
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:1214
enum AVCodecID id
Definition: mxfenc.c:85
static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
Definition: asfdec.c:828
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:1983
int size_left
Definition: asfdec.c:72
static av_always_inline int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riff.h:95
static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:620
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:130
AVInputFormat ff_asf_demuxer
Definition: asfdec.c:1782
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:2986
const char * desc
Definition: nvenc.c:101
int64_t pos
Definition: avformat.h:664
static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
Definition: asfdec.c:314
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
int data_size
Definition: asfdec.c:70
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3483
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:770
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:706
int size
Definition: avcodec.h:1347
uint32_t packet_size
Definition: asfdec.c:101
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:242
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:890
uint16_t virtual_pkt_len
Definition: asfdec.c:82
#define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE
Definition: asf.h:142
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:189
const ff_asf_guid ff_asf_command_stream
Definition: asf.c:65
#define FF_ARRAY_ELEMS(a)
const char * name
Definition: asfdec.c:59
#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:323
ASFStreamData asf_sd[ASF_MAX_STREAMS]
Definition: asfdec.c:119
static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:841
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:748
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.c:138
Macro definitions for various function/variable attributes.
static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:935
static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
Definition: asfdec.c:1149
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:202
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:2758
#define ASF_QWORD
Definition: asfdec.c:45
Format I/O context.
Definition: avformat.h:940
char str[32]
Definition: internal.h:42
Public dictionary API.
static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
Definition: asfdec.c:1222
uint8_t
uint8_t stream_index
Definition: asfdec.c:73
Opaque data information usually continuous.
Definition: avutil.h:196
int width
Video only.
Definition: avcodec.h:3525
const ff_asf_guid ff_asf_audio_stream
Definition: asf.c:39
int is_simple_index
Definition: asfdec.c:96
AVOptions.
uint8_t dts_delta
Definition: asfdec.c:127
int id
Format-specific stream ID.
Definition: avformat.h:712
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2648
int64_t send_time
Definition: asfdec.c:102
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1008
uint8_t * data
Definition: avcodec.h:1346
int64_t offset
Definition: asfdec.c:111
int64_t packet_offset
Definition: asfdec.c:129
static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:649
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:401
static int flags
Definition: log.c:50
uint32_t tag
Definition: movenc.c:854
#define AVERROR_EOF
End of file.
Definition: error.h:51
enum AVCodecID id
Definition: internal.h:43
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:117
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:295
#define ASF_GUID
Definition: asfdec.c:43
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:545
uint32_t pad_len
Definition: asfdec.c:130
AVRational aspect_ratio
Definition: asfdec.c:91
static int asf_read_value(AVFormatContext *s, const uint8_t *name, uint16_t val_len, int type, AVDictionary **met)
Definition: asfdec.c:273
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1378
static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type)
Definition: asfdec.c:553
#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:295
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:84
int16_t lang_idx
Definition: asfdec.c:84
#define AVINDEX_KEYFRAME
Definition: avformat.h:666
static int asf_read_picture(AVFormatContext *s, int len)
Definition: asfdec.c:358
static int64_t start_time
Definition: avplay.c:245
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:193
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1148
static void get_id3_tag(AVFormatContext *s)
Definition: asfdec.c:458
int indexed
Definition: asfdec.c:80
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:1255
#define ASF_MAX_STREAMS
Definition: asfdec.c:52
#define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE
Definition: asf.h:137
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:665
#define ASF_BYTE_ARRAY
Definition: asfdec.c:48
int type
Definition: asfdec.c:79
#define AVERROR(e)
Definition: error.h:43
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.c:99
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
g
Definition: yuv2rgb.c:546
void ff_asfcrypt_dec(const uint8_t key[20], uint8_t *data, int len)
Definition: asfcrypt.c:147
#define ASF_FLAG_BROADCAST
Definition: asfdec.c:47
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:175
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3479
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:734
int64_t sub_dts
Definition: asfdec.c:126
#define ASF_WORD
Definition: asfdec.c:42
static const GUIDParseTable * find_guid(ff_asf_guid guid)
Definition: asfdec.c:1655
ff_asf_guid guid
Definition: asfdec.c:60
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:781
#define FFMAX(a, b)
Definition: common.h:64
static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:573
#define fail()
Definition: checkasm.h:80
int index
Definition: asfdec.c:78
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:89
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1352
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3501
static int asf_read_header(AVFormatContext *s)
Definition: asfdec.c:1701
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:536
#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE
Definition: asfdec.c:56
int bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3512
#define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT
Definition: asf.h:116
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:400
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:113
common internal API header
static int asf_set_metadata(AVFormatContext *s, const uint8_t *name, int type, AVDictionary **met)
Definition: asfdec.c:337
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:153
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:86
enum ASFContext::@124 state
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:29
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() and children.
Definition: dict.h:64
uint32_t frame_num
Definition: asfdec.c:68
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
int64_t dts
Definition: asfdec.c:67
#define ASF_DWORD
Definition: asfdec.c:44
static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:173
uint64_t data_size
Definition: asfdec.c:108
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: avio.h:286
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
int32_t
const ff_asf_guid ff_asf_ext_stream_embed_stream_header
Definition: asf.c:100
AVDictionary * metadata
Definition: avformat.h:772
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:193
static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:500
static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index, int64_t *pos, int64_t pos_limit)
Definition: asfdec.c:1575
static int asf_read_packet_header(AVFormatContext *s)
Definition: asfdec.c:1354
static int asf_probe(AVProbeData *pd)
Definition: asfdec.c:150
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:694
unsigned int nb_sub
Definition: asfdec.c:135
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag, including supported extra metadata.
Definition: id3v2.c:702
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:546
if(ac->has_optimized_func)
#define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT
Definition: asf.h:97
uint8_t ff_asf_guid[16]
Definition: riff.h:71
Stream structure.
Definition: avformat.h:705
uint32_t rep_data_len
Definition: asfdec.c:131
NULL
Definition: eval.c:55
uint32_t prop_flags
Definition: asfdec.c:106
AVPacket avpkt
Definition: asfdec.c:66
static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:220
static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:909
uint32_t packet_size_internal
Definition: asfdec.c:128
AVIOContext * pb
I/O context.
Definition: avformat.h:982
static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:724
const ff_asf_guid ff_asf_video_stream
Definition: asf.c:53
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:347
static int parse_video_info(AVIOContext *pb, AVStream *st)
Definition: asfdec.c:692
#define READ_LEN(flag, name, len)
Definition: asfdec.c:1070
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:427
int64_t first_packet_offset
Definition: asfdec.c:114
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:68
int nb_index_entries
Definition: avformat.h:892
static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
Definition: asfdec.c:167
AVDictionary * asf_met
Definition: asfdec.c:90
rational number numerator/denominator
Definition: rational.h:43
#define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE
Definition: asf.h:121
byte swapping routines
static int asf_read_close(AVFormatContext *s)
Definition: asfdec.c:1515
uint64_t sub_left
Definition: asfdec.c:134
#define BMP_HEADER_SIZE
Definition: asfdec.c:53
uint64_t unknown_size
Definition: asfdec.c:109
AVMediaType
Definition: avutil.h:192
static void reset_packet_state(AVFormatContext *s)
Definition: asfdec.c:1532
uint16_t mult_sub_len
Definition: asfdec.c:136
This structure contains the data a format has to probe a file.
Definition: avformat.h:398
uint32_t b_flags
Definition: asfdec.c:105
static void reset_packet(ASFPacket *asf_pkt)
Definition: asfdec.c:1137
static AVStream * find_stream(AVFormatContext *s, uint16_t st_num)
Definition: asfdec.c:537
ASFPacket pkt
Definition: asfdec.c:85
#define ASF_ERROR_CORRECTION_LENGTH_TYPE
Definition: asfdec.c:55
static int64_t pts
Global timestamp for the audio frames.
#define ASF_STREAM_NUM
Definition: asfdec.c:51
int64_t unknown_offset
Definition: asfdec.c:115
int duration
Definition: asfdec.c:71
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.c:468
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:757
int is_header
Definition: asfdec.c:97
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:407
const uint8_t * key
Definition: avformat.h:1084
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:649
Main libavformat public API header.
static struct @174 state
uint64_t sub_header_offset
Definition: asfdec.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:131
static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len, unsigned char *ch, uint16_t buflen)
Definition: asfdec.c:259
#define ASF_UNICODE
Definition: asfdec.c:46
common internal and external API header
int is_subobject
Definition: asfdec.c:62
uint64_t nb_packets
how many packets are there in the file, invalid if broadcasting
Definition: asfdec.c:100
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:750
#define ASF_NUM_OF_PAYLOADS
Definition: asfdec.c:54
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:761
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:31
static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec.c:971
int den
denominator
Definition: rational.h:45
#define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE
Definition: asf.h:147
int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size)
Read BITMAPINFOHEADER structure and set AVStream codec width, height and bits_per_encoded_sample fiel...
Definition: riffdec.c:183
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:638
static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec.c:1274
int eof_reached
true if eof reached
Definition: avio.h:132
int len
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size)
Definition: riffdec.c:82
static uint8_t tmp[8]
Definition: des.c:38
void * priv_data
Format private data.
Definition: avformat.h:968
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3497
static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
Definition: asfdec.c:203
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1345
int duration
Definition: asfdec.c:103
uint64_t nb_mult_left
Definition: asfdec.c:137
char langs[32]
Definition: asfdec.c:89
int stream_index
Definition: asfdec.c:122
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: asfdec.c:1634
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:529
#define AV_DICT_IGNORE_SUFFIX
Definition: dict.h:60
static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
Definition: asfdec.c:1671
static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt, ASFPacket *asf_pkt)
Definition: asfdec.c:1171
ASFStream * asf_st[ASF_MAX_STREAMS]
Definition: asfdec.c:118
AVCodecParameters * codecpar
Definition: avformat.h:831
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3487
#define FFSWAP(type, a, b)
Definition: common.h:69
int stream_index
Definition: avcodec.h:1348
static void swap_guid(ff_asf_guid guid)
Definition: asfdec.c:159
static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
Definition: asfdec.c:1389
int(* read_object)(AVFormatContext *, const struct GUIDParseTable *)
Definition: asfdec.c:61
static const GUIDParseTable gdef[]
Definition: asfdec.c:1020
int flags
Definition: asfdec.c:69
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:90
This structure stores compressed data.
Definition: avcodec.h:1323
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:673
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:211
int8_t span
Definition: asfdec.c:81
uint16_t virtual_chunk_len
Definition: asfdec.c:83
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:790
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec.c:1431
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:235
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:1261
#define av_unused
Definition: attributes.h:86
static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
Definition: asfdec.c:1082