FFmpeg  4.3.8
asfdec_o.c
Go to the documentation of this file.
1 /*
2  * Microsoft Advanced Streaming Format demuxer
3  * Copyright (c) 2014 Alexandra Hájková
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/attributes.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/bswap.h"
25 #include "libavutil/common.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
31 
32 #include "avformat.h"
33 #include "avio_internal.h"
34 #include "avlanguage.h"
35 #include "id3v2.h"
36 #include "internal.h"
37 #include "riff.h"
38 #include "asf.h"
39 #include "asfcrypt.h"
40 
41 #define ASF_BOOL 0x2
42 #define ASF_WORD 0x5
43 #define ASF_GUID 0x6
44 #define ASF_DWORD 0x3
45 #define ASF_QWORD 0x4
46 #define ASF_UNICODE 0x0
47 #define ASF_FLAG_BROADCAST 0x1
48 #define ASF_BYTE_ARRAY 0x1
49 #define ASF_TYPE_AUDIO 0x2
50 #define ASF_TYPE_VIDEO 0x1
51 #define ASF_STREAM_NUM 0x7F
52 #define ASF_MAX_STREAMS 128
53 #define BMP_HEADER_SIZE 40
54 #define ASF_NUM_OF_PAYLOADS 0x3F
55 #define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
56 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
57 
58 typedef struct GUIDParseTable {
59  const char *name;
64 
65 typedef struct ASFPacket {
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;
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 
114  int64_t first_packet_offset; // packet offset
115  int64_t unknown_offset; // for top level header objects or subobjects without specified behavior
117 
118  // ASF file must not contain more than 128 streams according to the specification
119  ASFStream *asf_st[ASF_MAX_STREAMS];
122 
123  int stream_index; // from packet header, for the subpayload case
124 
125  // packet parameters
126  uint64_t sub_header_offset; // offset of subpayload header
128  uint8_t dts_delta; // for subpayloads
129  uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0
130  int64_t packet_offset; // offset of the current packet inside Data Object
131  uint32_t pad_len; // padding after payload
132  uint32_t rep_data_len;
133 
134  // packet state
135  uint64_t sub_left; // subpayloads left or not
136  unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet
137  uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload
138  uint64_t nb_mult_left; // multiple payloads left
140  enum {
144  READ_MULTI_SUB
145  } state;
146 } ASFContext;
147 
150 
151 static int asf_probe(const AVProbeData *pd)
152 {
153  /* check file header */
154  if (!ff_guidcmp(pd->buf, &ff_asf_header))
155  return AVPROBE_SCORE_MAX/2;
156  else
157  return 0;
158 }
159 
161 {
162  FFSWAP(unsigned char, guid[0], guid[3]);
163  FFSWAP(unsigned char, guid[1], guid[2]);
164  FFSWAP(unsigned char, guid[4], guid[5]);
165  FFSWAP(unsigned char, guid[6], guid[7]);
166 }
167 
168 static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
169 {
170  if (size < INT64_MAX - offset && avio_tell(pb) != offset + size)
171  avio_seek(pb, offset + size, SEEK_SET);
172 }
173 
175 {
176  ASFContext *asf = s->priv_data;
177  AVIOContext *pb = s->pb;
178  uint64_t size = avio_rl64(pb);
179  int ret;
180 
181  if (size > INT64_MAX || asf->in_asf_read_unknown > 5)
182  return AVERROR_INVALIDDATA;
183 
184  if (asf->is_header)
185  asf->unknown_size = size;
186  asf->is_header = 0;
187  if (!g->is_subobject) {
188  if (!(ret = strcmp(g->name, "Header Extension")))
189  avio_skip(pb, 22); // skip reserved fields and Data Size
190  asf->in_asf_read_unknown ++;
192  asf->unknown_size);
193  asf->in_asf_read_unknown --;
194  if (ret < 0)
195  return ret;
196  } else {
197  if (size < 24) {
198  av_log(s, AV_LOG_ERROR, "Too small size %"PRIu64" (< 24).\n", size);
199  return AVERROR_INVALIDDATA;
200  }
201  avio_skip(pb, size - 24);
202  }
203 
204  return 0;
205 }
206 
207 static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
208 {
209  char *q = buf;
210  int ret = 0;
211  if (buflen <= 0)
212  return AVERROR(EINVAL);
213  while (ret + 1 < maxlen) {
214  uint8_t tmp;
215  uint32_t ch;
216  GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;);
217  PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)
218  }
219  *q = 0;
220 
221  return ret;
222 }
223 
225 {
226  ASFContext *asf = s->priv_data;
227  AVIOContext *pb = s->pb;
228  uint64_t size = avio_rl64(pb);
229  int i, nb_markers, ret;
230  size_t len;
231  char name[1024];
232 
233  avio_skip(pb, 8);
234  avio_skip(pb, 8); // skip reserved GUID
235  nb_markers = avio_rl32(pb);
236  avio_skip(pb, 2); // skip reserved field
237  len = avio_rl16(pb);
238  for (i = 0; i < len; i++)
239  avio_skip(pb, 1);
240 
241  for (i = 0; i < nb_markers; i++) {
242  int64_t pts;
243 
244  avio_skip(pb, 8);
245  pts = avio_rl64(pb);
246  pts -= asf->preroll * 10000;
247  avio_skip(pb, 2); // entry length
248  avio_skip(pb, 4); // send time
249  avio_skip(pb, 4); // flags
250  len = avio_rl32(pb);
251 
252  if (avio_feof(pb))
253  return AVERROR_INVALIDDATA;
254 
255  if ((ret = avio_get_str16le(pb, len, name,
256  sizeof(name))) < len)
257  avio_skip(pb, len - ret);
258  avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
260  }
261  align_position(pb, asf->offset, size);
262 
263  return 0;
264 }
265 
266 static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
267  unsigned char *ch, uint16_t buflen)
268 {
269  AVIOContext *pb = s->pb;
270 
271  avio_get_str16le(pb, len, ch, buflen);
272  if (ch[0]) {
273  if (av_dict_set(&s->metadata, title, ch, 0) < 0)
274  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
275  }
276 
277  return 0;
278 }
279 
281  uint16_t val_len, int type, AVDictionary **met)
282 {
283  int ret;
284  uint8_t *value;
285  uint16_t buflen = 2 * val_len + 1;
286  AVIOContext *pb = s->pb;
287 
288  value = av_malloc(buflen);
289  if (!value)
290  return AVERROR(ENOMEM);
291  if (type == ASF_UNICODE) {
292  // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
293  if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
294  goto failed;
295  if (av_dict_set(met, name, value, 0) < 0)
296  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
297  } else {
298  char buf[256];
299  if (val_len > sizeof(buf)) {
300  ret = AVERROR_INVALIDDATA;
301  goto failed;
302  }
303  if ((ret = avio_read(pb, value, val_len)) < 0)
304  goto failed;
305  if (ret < 2 * val_len)
306  value[ret] = '\0';
307  else
308  value[2 * val_len - 1] = '\0';
309  snprintf(buf, sizeof(buf), "%s", value);
310  if (av_dict_set(met, name, buf, 0) < 0)
311  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
312  }
313  av_freep(&value);
314 
315  return 0;
316 
317 failed:
318  av_freep(&value);
319  return ret;
320 }
321 static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
322 {
323 
324  switch (type) {
325  case ASF_BOOL:
326  *value = avio_rl16(pb);
327  break;
328  case ASF_DWORD:
329  *value = avio_rl32(pb);
330  break;
331  case ASF_QWORD:
332  *value = avio_rl64(pb);
333  break;
334  case ASF_WORD:
335  *value = avio_rl16(pb);
336  break;
337  default:
338  return AVERROR_INVALIDDATA;
339  }
340 
341  return 0;
342 }
343 
345  int type, AVDictionary **met)
346 {
347  AVIOContext *pb = s->pb;
348  uint64_t value;
349  char buf[32];
350  int ret;
351 
352  ret = asf_read_generic_value(pb, type, &value);
353  if (ret < 0)
354  return ret;
355 
356  snprintf(buf, sizeof(buf), "%"PRIu64, value);
357  if (av_dict_set(met, name, buf, 0) < 0)
358  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
359 
360  return 0;
361 }
362 
363 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
364  * but in reality this is only loosely similar */
366 {
367  AVPacket pkt = { 0 };
368  const CodecMime *mime = ff_id3v2_mime_tags;
369  enum AVCodecID id = AV_CODEC_ID_NONE;
370  char mimetype[64];
371  uint8_t *desc = NULL;
372  AVStream *st = NULL;
373  int ret, type, picsize, desc_len;
374 
375  /* type + picsize + mime + desc */
376  if (len < 1 + 4 + 2 + 2) {
377  av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
378  return AVERROR_INVALIDDATA;
379  }
380 
381  /* picture type */
382  type = avio_r8(s->pb);
383  len--;
384  if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
385  av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
386  type = 0;
387  }
388 
389  /* picture data size */
390  picsize = avio_rl32(s->pb);
391  len -= 4;
392 
393  /* picture MIME type */
394  len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
395  while (mime->id != AV_CODEC_ID_NONE) {
396  if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
397  id = mime->id;
398  break;
399  }
400  mime++;
401  }
402  if (id == AV_CODEC_ID_NONE) {
403  av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
404  mimetype);
405  return 0;
406  }
407 
408  if (picsize >= len) {
409  av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
410  picsize, len);
411  return AVERROR_INVALIDDATA;
412  }
413 
414  /* picture description */
415  desc_len = (len - picsize) * 2 + 1;
416  desc = av_malloc(desc_len);
417  if (!desc)
418  return AVERROR(ENOMEM);
419  len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
420 
421  ret = av_get_packet(s->pb, &pkt, picsize);
422  if (ret < 0)
423  goto fail;
424 
425  st = avformat_new_stream(s, NULL);
426  if (!st) {
427  ret = AVERROR(ENOMEM);
428  goto fail;
429  }
430 
433  st->codecpar->codec_id = id;
434  st->attached_pic = pkt;
435  st->attached_pic.stream_index = st->index;
437 
438  if (*desc) {
439  if (av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL) < 0)
440  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
441  } else
442  av_freep(&desc);
443 
444  if (av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0) < 0)
445  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
446 
447  return 0;
448 
449 fail:
450  av_freep(&desc);
451  av_packet_unref(&pkt);
452  return ret;
453 }
454 
455 static void get_id3_tag(AVFormatContext *s, int len)
456 {
457  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
458 
459  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
460  if (id3v2_extra_meta) {
461  ff_id3v2_parse_apic(s, id3v2_extra_meta);
462  ff_id3v2_parse_chapters(s, id3v2_extra_meta);
463  }
464  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
465 }
466 
467 static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
468  uint16_t val_len, uint16_t type, AVDictionary **met)
469 {
470  int ret;
472 
473  if (val_len) {
474  switch (type) {
475  case ASF_UNICODE:
476  asf_read_value(s, name, val_len, type, met);
477  break;
478  case ASF_BYTE_ARRAY:
479  if (!strcmp(name, "WM/Picture")) // handle cover art
480  asf_read_picture(s, val_len);
481  else if (!strcmp(name, "ID3")) // handle ID3 tag
482  get_id3_tag(s, val_len);
483  else
484  asf_read_value(s, name, val_len, type, met);
485  break;
486  case ASF_GUID:
487  ff_get_guid(s->pb, &guid);
488  break;
489  default:
490  if ((ret = asf_set_metadata(s, name, type, met)) < 0)
491  return ret;
492  break;
493  }
494  }
495 
496  return 0;
497 }
498 
500 {
501  ASFContext *asf = s->priv_data;
502  AVIOContext *pb = s->pb;
503  uint64_t size = avio_rl64(pb);
504  uint16_t nb_desc = avio_rl16(pb);
505  int i, ret;
506 
507  for (i = 0; i < nb_desc; i++) {
508  uint16_t name_len, type, val_len;
509  uint8_t *name = NULL;
510 
511  name_len = avio_rl16(pb);
512  if (!name_len)
513  return AVERROR_INVALIDDATA;
514  name = av_malloc(name_len);
515  if (!name)
516  return AVERROR(ENOMEM);
517  avio_get_str16le(pb, name_len, name,
518  name_len);
519  type = avio_rl16(pb);
520  // BOOL values are 16 bits long in the Metadata Object
521  // but 32 bits long in the Extended Content Description Object
522  if (type == ASF_BOOL)
523  type = ASF_DWORD;
524  val_len = avio_rl16(pb);
525 
526  ret = process_metadata(s, name, name_len, val_len, type, &s->metadata);
527  av_freep(&name);
528  if (ret < 0)
529  return ret;
530  }
531 
532  align_position(pb, asf->offset, size);
533  return 0;
534 }
535 
536 static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
537 {
538  AVStream *st = NULL;
539  ASFContext *asf = s->priv_data;
540  int i;
541 
542  for (i = 0; i < asf->nb_streams; i++) {
543  if (asf->asf_st[i]->stream_index == st_num) {
544  st = s->streams[asf->asf_st[i]->index];
545  break;
546  }
547  }
548 
549  return st;
550 }
551 
553 {
554  ASFContext *asf = s->priv_data;
555  AVIOContext *pb = s->pb;
556  uint64_t value = 0;
557  int ret;
558 
559  ret = asf_read_generic_value(pb, type, &value);
560  if (ret < 0)
561  return ret;
562 
563  if (st_num < ASF_MAX_STREAMS) {
564  if (!strcmp(name, "AspectRatioX"))
565  asf->asf_sd[st_num].aspect_ratio.num = value;
566  else
567  asf->asf_sd[st_num].aspect_ratio.den = value;
568  }
569  return 0;
570 }
571 
573 {
574  ASFContext *asf = s->priv_data;
575  AVIOContext *pb = s->pb;
576  uint64_t size = avio_rl64(pb);
577  uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
578  int i, ret;
579 
580  for (i = 0; i < nb_recs; i++) {
581  uint16_t name_len, buflen, type, val_len, st_num;
582  uint8_t *name = NULL;
583 
584  avio_skip(pb, 2); // skip reserved field
585  st_num = avio_rl16(pb);
586  name_len = avio_rl16(pb);
587  buflen = 2 * name_len + 1;
588  if (!name_len)
589  break;
590  type = avio_rl16(pb);
591  val_len = avio_rl32(pb);
592  name = av_malloc(buflen);
593  if (!name)
594  return AVERROR(ENOMEM);
595  avio_get_str16le(pb, name_len, name,
596  buflen);
597  if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
598  ret = asf_store_aspect_ratio(s, st_num, name, type);
599  if (ret < 0) {
600  av_freep(&name);
601  break;
602  }
603  } else {
604  if (st_num < ASF_MAX_STREAMS) {
605  if ((ret = process_metadata(s, name, name_len, val_len, type,
606  &asf->asf_sd[st_num].asf_met)) < 0) {
607  av_freep(&name);
608  break;
609  }
610  }
611  }
612  av_freep(&name);
613  }
614 
615  align_position(pb, asf->offset, size);
616  return 0;
617 }
618 
620 {
621  ASFContext *asf = s->priv_data;
622  AVIOContext *pb = s->pb;
623  int i;
624  static const char *const titles[] =
625  { "Title", "Author", "Copyright", "Description", "Rate" };
626  uint16_t len[5], buflen[5] = { 0 };
627  uint8_t *ch;
628  uint64_t size = avio_rl64(pb);
629 
630  for (i = 0; i < 5; i++) {
631  len[i] = avio_rl16(pb);
632  // utf8 string should be <= 2 * utf16 string, extra byte for the terminator
633  buflen[i] = 2 * len[i] + 1;
634  }
635 
636  for (i = 0; i < 5; i++) {
637  ch = av_malloc(buflen[i]);
638  if (!ch)
639  return(AVERROR(ENOMEM));
640  asf_read_metadata(s, titles[i], len[i], ch, buflen[i]);
641  av_freep(&ch);
642  }
643  align_position(pb, asf->offset, size);
644 
645  return 0;
646 }
647 
649 {
650  ASFContext *asf = s->priv_data;
651  AVIOContext *pb = s->pb;
652  time_t creation_time;
653 
654  avio_rl64(pb); // read object size
655  avio_skip(pb, 16); // skip File ID
656  avio_skip(pb, 8); // skip File size
657  creation_time = avio_rl64(pb);
658  if (!(asf->b_flags & ASF_FLAG_BROADCAST)) {
659  struct tm tmbuf;
660  struct tm *tm;
661  char buf[64];
662 
663  // creation date is in 100 ns units from 1 Jan 1601, conversion to s
664  creation_time /= 10000000;
665  // there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970
666  creation_time -= 11644473600;
667  tm = gmtime_r(&creation_time, &tmbuf);
668  if (tm) {
669  if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
670  buf[0] = '\0';
671  } else
672  buf[0] = '\0';
673  if (buf[0]) {
674  if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0)
675  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
676  }
677  }
678  asf->nb_packets = avio_rl64(pb);
679  asf->duration = avio_rl64(pb) / 10000; // stream duration
680  avio_skip(pb, 8); // skip send duration
681  asf->preroll = avio_rl64(pb);
682  asf->duration -= asf->preroll;
683  asf->b_flags = avio_rl32(pb);
684  avio_skip(pb, 4); // skip minimal packet size
685  asf->packet_size = avio_rl32(pb);
686  avio_skip(pb, 4); // skip max_bitrate
687 
688  return 0;
689 }
690 
692 {
693  uint16_t size_asf; // ASF-specific Format Data size
694  uint32_t size_bmp; // BMP_HEADER-specific Format Data 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_asf = avio_rl16(pb);
701  tag = ff_get_bmp_header(pb, st, &size_bmp);
702  st->codecpar->codec_tag = tag;
704  size_bmp = FFMAX(size_asf, size_bmp);
705 
706  if (size_bmp > BMP_HEADER_SIZE) {
707  int ret = ff_get_extradata(avfmt, st->codecpar, pb, size_bmp - BMP_HEADER_SIZE);
708 
709  if (ret < 0)
710  return ret;
711  }
712  return 0;
713 }
714 
716 {
717  ASFContext *asf = s->priv_data;
718  AVIOContext *pb = s->pb;
719  uint64_t size;
720  uint32_t err_data_len, ts_data_len; // type specific data length
721  uint16_t flags;
722  ff_asf_guid stream_type;
723  enum AVMediaType type;
724  int i, ret;
725  uint8_t stream_index;
726  AVStream *st;
727  ASFStream *asf_st;
728 
729  // ASF file must not contain more than 128 streams according to the specification
730  if (asf->nb_streams >= ASF_MAX_STREAMS)
731  return AVERROR_INVALIDDATA;
732 
733  size = avio_rl64(pb);
734  ff_get_guid(pb, &stream_type);
735  if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
736  type = AVMEDIA_TYPE_AUDIO;
737  else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
738  type = AVMEDIA_TYPE_VIDEO;
739  else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
740  type = AVMEDIA_TYPE_VIDEO;
741  else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
742  type = AVMEDIA_TYPE_DATA;
743  else if (!ff_guidcmp(&stream_type,
745  type = AVMEDIA_TYPE_UNKNOWN;
746  else
747  return AVERROR_INVALIDDATA;
748 
749  ff_get_guid(pb, &stream_type); // error correction type
750  avio_skip(pb, 8); // skip the time offset
751  ts_data_len = avio_rl32(pb);
752  err_data_len = avio_rl32(pb);
753  flags = avio_rl16(pb); // bit 15 - Encrypted Content
754 
755  stream_index = flags & ASF_STREAM_NUM;
756  for (i = 0; i < asf->nb_streams; i++)
757  if (stream_index == asf->asf_st[i]->stream_index) {
759  "Duplicate stream found, this stream will be ignored.\n");
760  align_position(pb, asf->offset, size);
761  return 0;
762  }
763 
764  st = avformat_new_stream(s, NULL);
765  if (!st)
766  return AVERROR(ENOMEM);
767  avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
768  st->codecpar->codec_type = type;
769  asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
770  if (!asf->asf_st[asf->nb_streams])
771  return AVERROR(ENOMEM);
772  asf_st = asf->asf_st[asf->nb_streams];
773  asf->nb_streams++;
774  asf_st->stream_index = stream_index;
775  asf_st->index = st->index;
776  asf_st->indexed = 0;
777  st->id = flags & ASF_STREAM_NUM;
778  av_init_packet(&asf_st->pkt.avpkt);
779  asf_st->pkt.data_size = 0;
780  avio_skip(pb, 4); // skip reserved field
781 
782  switch (type) {
783  case AVMEDIA_TYPE_AUDIO:
784  asf_st->type = AVMEDIA_TYPE_AUDIO;
785  if ((ret = ff_get_wav_header(s, pb, st->codecpar, ts_data_len, 0)) < 0)
786  return ret;
787  break;
788  case AVMEDIA_TYPE_VIDEO:
789  asf_st->type = AVMEDIA_TYPE_VIDEO;
790  if ((ret = parse_video_info(s, pb, st)) < 0)
791  return ret;
792  break;
793  default:
794  avio_skip(pb, ts_data_len);
795  break;
796  }
797 
798  if (err_data_len) {
799  if (type == AVMEDIA_TYPE_AUDIO) {
800  uint8_t span = avio_r8(pb);
801  if (span > 1) {
802  asf_st->span = span;
803  asf_st->virtual_pkt_len = avio_rl16(pb);
804  asf_st->virtual_chunk_len = avio_rl16(pb);
805  if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
806  return AVERROR_INVALIDDATA;
807  avio_skip(pb, err_data_len - 5);
808  } else
809  avio_skip(pb, err_data_len - 1);
810  } else
811  avio_skip(pb, err_data_len);
812  }
813 
814  align_position(pb, asf->offset, size);
815 
816  return 0;
817 }
818 
819 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
820 {
821  // language abbr should contain at least 2 chars
822  if (rfc1766 && strlen(rfc1766) > 1) {
823  const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
824  const char *iso6392 = ff_convert_lang_to(primary_tag,
826  if (iso6392)
827  if (av_dict_set(met, "language", iso6392, 0) < 0)
828  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
829  }
830 }
831 
833 {
834  ASFContext *asf = s->priv_data;
835  AVIOContext *pb = s->pb;
836  AVStream *st = NULL;
838  uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
839  int i, ret;
840  uint32_t bitrate;
841  uint64_t start_time, end_time, time_per_frame;
842  uint64_t size = avio_rl64(pb);
843 
844  start_time = avio_rl64(pb);
845  end_time = avio_rl64(pb);
846  bitrate = avio_rl32(pb);
847  avio_skip(pb, 28); // skip some unused values
848  st_num = avio_rl16(pb);
849  st_num &= ASF_STREAM_NUM;
850  lang_idx = avio_rl16(pb); // Stream Language ID Index
851  for (i = 0; i < asf->nb_streams; i++) {
852  if (st_num == asf->asf_st[i]->stream_index) {
853  st = s->streams[asf->asf_st[i]->index];
854  asf->asf_st[i]->lang_idx = lang_idx;
855  break;
856  }
857  }
858  time_per_frame = avio_rl64(pb); // average time per frame
859  if (st) {
860  st->start_time = start_time;
861  st->duration = end_time - start_time;
862  st->codecpar->bit_rate = bitrate;
863  st->avg_frame_rate.num = 10000000;
864  st->avg_frame_rate.den = time_per_frame;
865  }
866  nb_st_name = avio_rl16(pb);
867  nb_pay_exts = avio_rl16(pb);
868  for (i = 0; i < nb_st_name; i++) {
869  uint16_t len;
870 
871  avio_rl16(pb); // Language ID Index
872  len = avio_rl16(pb);
873  avio_skip(pb, len);
874  }
875 
876  for (i = 0; i < nb_pay_exts; i++) {
877  uint32_t len;
878  avio_skip(pb, 16); // Extension System ID
879  avio_skip(pb, 2); // Extension Data Size
880  len = avio_rl32(pb);
881  avio_skip(pb, len);
882  }
883 
884  if ((ret = ff_get_guid(pb, &guid)) < 0) {
885  align_position(pb, asf->offset, size);
886 
887  return 0;
888  }
889 
890  g = find_guid(guid);
891  if (g && !(strcmp(g->name, "Stream Properties"))) {
892  if ((ret = g->read_object(s, g)) < 0)
893  return ret;
894  }
895 
896  align_position(pb, asf->offset, size);
897  return 0;
898 }
899 
901 {
902  ASFContext *asf = s->priv_data;
903  AVIOContext *pb = s->pb;
904  int i, ret;
905  uint64_t size = avio_rl64(pb);
906  uint16_t nb_langs = avio_rl16(pb);
907 
908  if (nb_langs < ASF_MAX_STREAMS) {
909  for (i = 0; i < nb_langs; i++) {
910  size_t len;
911  len = avio_r8(pb);
912  if (!len)
913  len = 6;
914  if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
915  sizeof(asf->asf_sd[i].langs))) < 0) {
916  return ret;
917  }
918  }
919  }
920 
921  align_position(pb, asf->offset, size);
922  return 0;
923 }
924 
925 // returns data object offset when reading this object for the first time
927 {
928  ASFContext *asf = s->priv_data;
929  AVIOContext *pb = s->pb;
930  uint64_t size = asf->data_size = avio_rl64(pb);
931  int i;
932 
933  if (!asf->data_reached) {
934  asf->data_reached = 1;
935  asf->data_offset = asf->offset;
936  }
937 
938  for (i = 0; i < asf->nb_streams; i++) {
939  if (!(asf->b_flags & ASF_FLAG_BROADCAST))
940  s->streams[i]->duration = asf->duration;
941  }
942  asf->nb_mult_left = 0;
943  asf->sub_left = 0;
944  asf->state = PARSE_PACKET_HEADER;
945  asf->return_subpayload = 0;
946  asf->packet_size_internal = 0;
947  avio_skip(pb, 16); // skip File ID
948  size = avio_rl64(pb); // Total Data Packets
949  if (size != asf->nb_packets)
951  "Number of Packets from File Properties Object is not equal to Total"
952  "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
953  size, asf->nb_packets);
954  avio_skip(pb, 2); // skip reserved field
955  asf->first_packet_offset = avio_tell(pb);
956  if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(asf->b_flags & ASF_FLAG_BROADCAST))
957  align_position(pb, asf->offset, asf->data_size);
958 
959  return 0;
960 }
961 
963 {
964  ASFContext *asf = s->priv_data;
965  AVIOContext *pb = s->pb;
966  AVStream *st = NULL;
967  uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
968  uint32_t pkt_num, nb_entries;
969  int32_t prev_pkt_num = -1;
970  int i;
971  int64_t offset;
972  uint64_t size = avio_rl64(pb);
973 
974  if (size < 24)
975  return AVERROR_INVALIDDATA;
976 
977  // simple index objects should be ordered by stream number, this loop tries to find
978  // the first not indexed video stream
979  for (i = 0; i < asf->nb_streams; i++) {
980  if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
981  asf->asf_st[i]->indexed = 1;
982  st = s->streams[asf->asf_st[i]->index];
983  break;
984  }
985  }
986  if (!st) {
987  avio_skip(pb, size - 24); // if there's no video stream, skip index object
988  return 0;
989  }
990  avio_skip(pb, 16); // skip File ID
991  interval = avio_rl64(pb);
992  avio_skip(pb, 4);
993  nb_entries = avio_rl32(pb);
994  for (i = 0; i < nb_entries; i++) {
995  pkt_num = avio_rl32(pb);
996  offset = avio_skip(pb, 2);
997  if (offset < 0) {
998  av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
999  return offset;
1000  }
1001  if (prev_pkt_num != pkt_num) {
1003  pkt_num, av_rescale(interval, i, 10000),
1004  asf->packet_size, 0, AVINDEX_KEYFRAME);
1005  prev_pkt_num = pkt_num;
1006  }
1007  }
1008  asf->is_simple_index = 1;
1009  align_position(pb, asf->offset, size);
1010 
1011  return 0;
1012 }
1013 
1014 static const GUIDParseTable gdef[] = {
1015  { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
1016  { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
1017  { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
1018  { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
1019  { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
1020  { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
1021  { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
1022  { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
1023  { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1024  { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
1025  { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1026  { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
1027  { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
1028  { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1029  { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
1030  { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1031  { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
1032  { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
1033  { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1034  { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
1035  { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1036  { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1037  { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
1038  { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1039  { "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 },
1040  { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
1041  { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
1042  { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
1043  { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1044  { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
1045  { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
1046  { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
1047  { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1048  { "Content Encryption System Windows Media DRM Network Devices",
1049  { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
1050  { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1051  { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1052  { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1053  { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1054  { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1055  { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
1056  { "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 },
1057  { "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 },
1058  { "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 },
1059  { "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 },
1060  { "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 },
1061  { "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 },
1062 };
1063 
1064 #define READ_LEN(flag, name, len) \
1065  do { \
1066  if ((flag) == name ## IS_BYTE) \
1067  len = avio_r8(pb); \
1068  else if ((flag) == name ## IS_WORD) \
1069  len = avio_rl16(pb); \
1070  else if ((flag) == name ## IS_DWORD) \
1071  len = avio_rl32(pb); \
1072  else \
1073  len = 0; \
1074  } while(0)
1075 
1076 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
1077 {
1078  ASFContext *asf = s->priv_data;
1079  AVIOContext *pb = s->pb;
1080  uint8_t sub_len;
1081  int ret, i;
1082 
1083  if (is_header) {
1084  asf->dts_delta = avio_r8(pb);
1085  if (asf->nb_mult_left) {
1086  asf->mult_sub_len = avio_rl16(pb); // total
1087  }
1088  asf->sub_header_offset = avio_tell(pb);
1089  asf->nb_sub = 0;
1090  asf->sub_left = 1;
1091  }
1092  sub_len = avio_r8(pb);
1093  if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
1094  return ret;
1095  for (i = 0; i < asf->nb_streams; i++) {
1096  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1097  pkt->stream_index = asf->asf_st[i]->index;
1098  break;
1099  }
1100  }
1101  asf->return_subpayload = 1;
1102  if (!sub_len)
1103  asf->return_subpayload = 0;
1104 
1105  if (sub_len)
1106  asf->nb_sub++;
1107  pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1108  if (asf->nb_mult_left && (avio_tell(pb) >=
1109  (asf->sub_header_offset + asf->mult_sub_len))) {
1110  asf->sub_left = 0;
1111  asf->nb_mult_left--;
1112  }
1113  if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1114  asf->sub_left = 0;
1115  if (!asf->nb_mult_left) {
1116  avio_skip(pb, asf->pad_len);
1117  if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1118  if (!asf->packet_size)
1119  return AVERROR_INVALIDDATA;
1121  "Position %"PRId64" wrong, should be %"PRId64"\n",
1122  avio_tell(pb), asf->packet_offset + asf->packet_size);
1123  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1124  }
1125  }
1126  }
1127 
1128  return 0;
1129 }
1130 
1131 static void reset_packet(ASFPacket *asf_pkt)
1132 {
1133  asf_pkt->size_left = 0;
1134  asf_pkt->data_size = 0;
1135  asf_pkt->duration = 0;
1136  asf_pkt->flags = 0;
1137  asf_pkt->dts = 0;
1138  asf_pkt->duration = 0;
1139  av_packet_unref(&asf_pkt->avpkt);
1140  av_init_packet(&asf_pkt->avpkt);
1141 }
1142 
1144 {
1145  ASFContext *asf = s->priv_data;
1146  AVIOContext *pb = s->pb;
1147  int ret, data_size;
1148 
1149  if (!asf_pkt->data_size) {
1150  data_size = avio_rl32(pb); // read media object size
1151  if (data_size <= 0)
1152  return AVERROR_INVALIDDATA;
1153  if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1154  return ret;
1155  asf_pkt->data_size = asf_pkt->size_left = data_size;
1156  } else
1157  avio_skip(pb, 4); // reading of media object size is already done
1158  asf_pkt->dts = avio_rl32(pb); // read presentation time
1159  if (asf->rep_data_len >= 8)
1160  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1161 
1162  return 0;
1163 }
1164 
1166  ASFPacket *asf_pkt)
1167 {
1168  ASFContext *asf = s->priv_data;
1169  AVIOContext *pb = s->pb;
1170  uint16_t pay_len;
1171  unsigned char *p;
1172  int ret;
1173  int skip = 0;
1174 
1175  // if replicated length is 1, subpayloads are present
1176  if (asf->rep_data_len == 1) {
1177  asf->sub_left = 1;
1178  asf->state = READ_MULTI_SUB;
1179  pkt->flags = asf_pkt->flags;
1180  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1181  return ret;
1182  } else {
1183  if (asf->rep_data_len)
1184  if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1185  return ret;
1186  pay_len = avio_rl16(pb); // payload length should be WORD
1187  if (pay_len > asf->packet_size) {
1188  av_log(s, AV_LOG_ERROR,
1189  "Error: invalid data packet size, pay_len %"PRIu16", "
1190  "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1191  pay_len, asf->packet_size, avio_tell(pb));
1192  return AVERROR_INVALIDDATA;
1193  }
1194  p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1195  if (pay_len > asf_pkt->size_left) {
1196  av_log(s, AV_LOG_ERROR,
1197  "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1198  pay_len, asf_pkt->size_left);
1199  skip = pay_len - asf_pkt->size_left;
1200  pay_len = asf_pkt->size_left;
1201  }
1202  if (asf_pkt->size_left <= 0)
1203  return AVERROR_INVALIDDATA;
1204  if ((ret = avio_read(pb, p, pay_len)) < 0)
1205  return ret;
1206  if (s->key && s->keylen == 20)
1207  ff_asfcrypt_dec(s->key, p, ret);
1208  avio_skip(pb, skip);
1209  asf_pkt->size_left -= pay_len;
1210  asf->nb_mult_left--;
1211  }
1212 
1213  return 0;
1214 }
1215 
1217 {
1218  ASFContext *asf = s->priv_data;
1219  AVIOContext *pb = s->pb;
1220  int64_t offset;
1221  uint64_t size;
1222  unsigned char *p;
1223  int ret, data_size;
1224 
1225  if (!asf_pkt->data_size) {
1226  data_size = avio_rl32(pb); // read media object size
1227  if (data_size <= 0)
1228  return AVERROR_EOF;
1229  if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1230  return ret;
1231  asf_pkt->data_size = asf_pkt->size_left = data_size;
1232  } else
1233  avio_skip(pb, 4); // skip media object size
1234  asf_pkt->dts = avio_rl32(pb); // read presentation time
1235  if (asf->rep_data_len >= 8)
1236  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1237  offset = avio_tell(pb);
1238 
1239  // size of the payload - size of the packet without header and padding
1240  if (asf->packet_size_internal)
1241  size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1242  else
1243  size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1244  if (size > asf->packet_size) {
1245  av_log(s, AV_LOG_ERROR,
1246  "Error: invalid data packet size, offset %"PRId64".\n",
1247  avio_tell(pb));
1248  return AVERROR_INVALIDDATA;
1249  }
1250  p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1251  if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1252  return AVERROR_INVALIDDATA;
1253  if (asf_pkt->size_left > size)
1254  asf_pkt->size_left -= size;
1255  else
1256  asf_pkt->size_left = 0;
1257  if ((ret = avio_read(pb, p, size)) < 0)
1258  return ret;
1259  if (s->key && s->keylen == 20)
1260  ff_asfcrypt_dec(s->key, p, ret);
1261  if (asf->packet_size_internal)
1262  avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1263  avio_skip(pb, asf->pad_len); // skip padding
1264 
1265  return 0;
1266 }
1267 
1269 {
1270  ASFContext *asf = s->priv_data;
1271  AVIOContext *pb = s->pb;
1272  int ret, i;
1273  ASFPacket *asf_pkt = NULL;
1274 
1275  if (!asf->sub_left) {
1276  uint32_t off_len, media_len;
1277  uint8_t stream_num;
1278 
1279  stream_num = avio_r8(pb);
1280  asf->stream_index = stream_num & ASF_STREAM_NUM;
1281  for (i = 0; i < asf->nb_streams; i++) {
1282  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1283  asf_pkt = &asf->asf_st[i]->pkt;
1284  asf_pkt->stream_index = asf->asf_st[i]->index;
1285  break;
1286  }
1287  }
1288  if (!asf_pkt) {
1289  if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1290  if (!asf->packet_size) {
1291  av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1292  return AVERROR_INVALIDDATA;
1293  }
1294  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1295  av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1296  asf->stream_index);
1297  return AVERROR(EAGAIN);
1298  } else
1299  return AVERROR_INVALIDDATA;
1300  }
1301 
1302  if (stream_num >> 7)
1303  asf_pkt->flags |= AV_PKT_FLAG_KEY;
1305  ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1307  ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1309  ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1310  if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1311  av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1312  reset_packet(asf_pkt);
1313  }
1314  asf_pkt->frame_num = media_len;
1315  asf->sub_dts = off_len;
1316  if (asf->nb_mult_left) {
1317  if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1318  return ret;
1319  } else if (asf->rep_data_len == 1) {
1320  asf->sub_left = 1;
1321  asf->state = READ_SINGLE;
1322  pkt->flags = asf_pkt->flags;
1323  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1324  return ret;
1325  } else {
1326  if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1327  return ret;
1328  }
1329  } else {
1330  for (i = 0; i <= asf->nb_streams; i++) {
1331  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1332  asf_pkt = &asf->asf_st[i]->pkt;
1333  break;
1334  }
1335  }
1336  if (!asf_pkt)
1337  return AVERROR_INVALIDDATA;
1338  pkt->flags = asf_pkt->flags;
1339  pkt->dts = asf_pkt->dts;
1340  pkt->stream_index = asf->asf_st[i]->index;
1341  if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1342  return ret;
1343  }
1344 
1345  return 0;
1346 }
1347 
1349 {
1350  ASFContext *asf = s->priv_data;
1351  AVIOContext *pb = s->pb;
1352  uint64_t size;
1353  uint32_t av_unused seq;
1354  unsigned char error_flags, len_flags, pay_flags;
1355 
1356  asf->packet_offset = avio_tell(pb);
1357  if (asf->packet_offset > INT64_MAX/2)
1358  asf->packet_offset = 0;
1359  error_flags = avio_r8(pb); // read Error Correction Flags
1360  if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1361  if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1362  size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1363  avio_skip(pb, size);
1364  }
1365  len_flags = avio_r8(pb);
1366  } else
1367  len_flags = error_flags;
1368  asf->prop_flags = avio_r8(pb);
1370  ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1372  ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1374  ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1375  asf->send_time = avio_rl32(pb); // send time
1376  avio_skip(pb, 2); // skip duration
1377  if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1378  pay_flags = avio_r8(pb);
1379  asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1380  }
1381 
1382  return 0;
1383 }
1384 
1385 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1386 {
1387  ASFContext *asf = s->priv_data;
1388  ASFStream *asf_st = asf->asf_st[st_num];
1389  unsigned char *p = asf_pkt->avpkt.data;
1390  uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1391  uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1392  int nchunks = pkt_len / chunk_len;
1393  AVPacket pkt;
1394  int pos = 0, j, l, ret;
1395 
1396 
1397  if ((ret = av_new_packet(&pkt, asf_pkt->data_size)) < 0)
1398  return ret;
1399 
1400  while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1401  if (pos >= asf_pkt->data_size) {
1402  break;
1403  }
1404  for (l = 0; l < pkt_len; l++) {
1405  if (pos >= asf_pkt->data_size) {
1406  break;
1407  }
1408  for (j = 0; j < asf_st->span; j++) {
1409  if ((pos + chunk_len) >= asf_pkt->data_size)
1410  break;
1411  memcpy(pkt.data + pos,
1412  p + (j * nchunks + l) * chunk_len,
1413  chunk_len);
1414  pos += chunk_len;
1415  }
1416  }
1417  p += asf_st->span * pkt_len;
1418  if (p > asf_pkt->avpkt.data + asf_pkt->data_size)
1419  break;
1420  }
1421  av_packet_unref(&asf_pkt->avpkt);
1422  asf_pkt->avpkt = pkt;
1423 
1424  return 0;
1425 }
1426 
1428 {
1429  ASFContext *asf = s->priv_data;
1430  AVIOContext *pb = s->pb;
1431  int ret, i;
1432 
1433  if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1434  !(asf->b_flags & ASF_FLAG_BROADCAST))
1435  return AVERROR_EOF;
1436  while (!pb->eof_reached) {
1437  if (asf->state == PARSE_PACKET_HEADER) {
1439  if (pb->eof_reached)
1440  break;
1441  if (!asf->nb_mult_left)
1442  asf->state = READ_SINGLE;
1443  else
1444  asf->state = READ_MULTI;
1445  }
1446  ret = asf_read_payload(s, pkt);
1447  if (ret == AVERROR(EAGAIN)) {
1448  asf->state = PARSE_PACKET_HEADER;
1449  continue;
1450  }
1451  else if (ret < 0)
1452  return ret;
1453 
1454  switch (asf->state) {
1455  case READ_SINGLE:
1456  if (!asf->sub_left)
1457  asf->state = PARSE_PACKET_HEADER;
1458  break;
1459  case READ_MULTI_SUB:
1460  if (!asf->sub_left && !asf->nb_mult_left) {
1461  asf->state = PARSE_PACKET_HEADER;
1462  if (!asf->return_subpayload &&
1463  (avio_tell(pb) <= asf->packet_offset +
1464  asf->packet_size - asf->pad_len))
1465  avio_skip(pb, asf->pad_len); // skip padding
1466  if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1467  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1468  } else if (!asf->sub_left)
1469  asf->state = READ_MULTI;
1470  break;
1471  case READ_MULTI:
1472  if (!asf->nb_mult_left) {
1473  asf->state = PARSE_PACKET_HEADER;
1474  if (!asf->return_subpayload &&
1475  (avio_tell(pb) <= asf->packet_offset +
1476  asf->packet_size - asf->pad_len))
1477  avio_skip(pb, asf->pad_len); // skip padding
1478  if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1479  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1480  }
1481  break;
1482  }
1483  if (asf->return_subpayload) {
1484  asf->return_subpayload = 0;
1485  return 0;
1486  }
1487  for (i = 0; i < asf->nb_streams; i++) {
1488  ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1489  if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1490  if (asf->asf_st[i]->span > 1 &&
1491  asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1492  if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1493  return ret;
1494  av_packet_move_ref(pkt, &asf_pkt->avpkt);
1495  pkt->stream_index = asf->asf_st[i]->index;
1496  pkt->flags = asf_pkt->flags;
1497  pkt->dts = asf_pkt->dts - asf->preroll;
1498  asf_pkt->data_size = 0;
1499  asf_pkt->frame_num = 0;
1500  return 0;
1501  }
1502  }
1503  }
1504 
1505  if (pb->eof_reached)
1506  return AVERROR_EOF;
1507 
1508  return 0;
1509 }
1510 
1512 {
1513  ASFContext *asf = s->priv_data;
1514  int i;
1515 
1516  for (i = 0; i < ASF_MAX_STREAMS; i++) {
1517  av_dict_free(&asf->asf_sd[i].asf_met);
1518  if (i < asf->nb_streams) {
1519  av_packet_unref(&asf->asf_st[i]->pkt.avpkt);
1520  av_freep(&asf->asf_st[i]);
1521  }
1522  }
1523 
1524  asf->nb_streams = 0;
1525  return 0;
1526 }
1527 
1529 {
1530  ASFContext *asf = s->priv_data;
1531  int i;
1532 
1533  asf->state = PARSE_PACKET_HEADER;
1534  asf->offset = 0;
1535  asf->return_subpayload = 0;
1536  asf->sub_left = 0;
1537  asf->sub_header_offset = 0;
1538  asf->packet_offset = asf->first_packet_offset;
1539  asf->pad_len = 0;
1540  asf->rep_data_len = 0;
1541  asf->dts_delta = 0;
1542  asf->mult_sub_len = 0;
1543  asf->nb_mult_left = 0;
1544  asf->nb_sub = 0;
1545  asf->prop_flags = 0;
1546  asf->sub_dts = 0;
1547  for (i = 0; i < asf->nb_streams; i++) {
1548  ASFPacket *pkt = &asf->asf_st[i]->pkt;
1549  pkt->size_left = 0;
1550  pkt->data_size = 0;
1551  pkt->duration = 0;
1552  pkt->flags = 0;
1553  pkt->dts = 0;
1554  pkt->duration = 0;
1555  av_packet_unref(&pkt->avpkt);
1556  av_init_packet(&pkt->avpkt);
1557  }
1558 }
1559 
1560 /*
1561  * Find a timestamp for the requested position within the payload
1562  * where the pos (position) is the offset inside the Data Object.
1563  * When position is not on the packet boundary, asf_read_timestamp tries
1564  * to find the closest packet offset after this position. If this packet
1565  * is a key frame, this packet timestamp is read and an index entry is created
1566  * for the packet. If this packet belongs to the requested stream,
1567  * asf_read_timestamp upgrades pos to the packet beginning offset and
1568  * returns this packet's dts. So returned dts is the dts of the first key frame with
1569  * matching stream number after given position.
1570  */
1571 static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1572  int64_t *pos, int64_t pos_limit)
1573 {
1574  ASFContext *asf = s->priv_data;
1575  int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1576  AVPacket pkt;
1577  int n;
1578 
1579  data_end = asf->data_offset + asf->data_size;
1580 
1581  n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1582  asf->packet_size;
1583  n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1584  pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1585 
1586  avio_seek(s->pb, pkt_pos, SEEK_SET);
1587  pkt_offset = pkt_pos;
1588 
1589  reset_packet_state(s);
1590  while (avio_tell(s->pb) < data_end) {
1591 
1592  int i, ret, st_found;
1593 
1594  av_init_packet(&pkt);
1595  pkt_offset = avio_tell(s->pb);
1596  if ((ret = asf_read_packet(s, &pkt)) < 0) {
1597  dts = AV_NOPTS_VALUE;
1598  return ret;
1599  }
1600  // ASFPacket may contain fragments of packets belonging to different streams,
1601  // pkt_offset is the offset of the first fragment within it.
1602  if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1603  pkt_pos += asf->packet_size;
1604  for (i = 0; i < asf->nb_streams; i++) {
1605  ASFStream *st = asf->asf_st[i];
1606 
1607  st_found = 0;
1608  if (pkt.flags & AV_PKT_FLAG_KEY) {
1609  dts = pkt.dts;
1610  if (dts) {
1611  av_add_index_entry(s->streams[pkt.stream_index], pkt_pos,
1612  dts, pkt.size, 0, AVINDEX_KEYFRAME);
1613  if (stream_index == st->index) {
1614  st_found = 1;
1615  break;
1616  }
1617  }
1618  }
1619  }
1620  if (st_found)
1621  break;
1622  av_packet_unref(&pkt);
1623  }
1624  *pos = pkt_pos;
1625 
1626  av_packet_unref(&pkt);
1627  return dts;
1628 }
1629 
1630 static int asf_read_seek(AVFormatContext *s, int stream_index,
1631  int64_t timestamp, int flags)
1632 {
1633  ASFContext *asf = s->priv_data;
1634  int idx, ret;
1635 
1636  if (s->streams[stream_index]->nb_index_entries && asf->is_simple_index) {
1637  idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
1638  if (idx < 0 || idx >= s->streams[stream_index]->nb_index_entries)
1639  return AVERROR_INVALIDDATA;
1640  avio_seek(s->pb, s->streams[stream_index]->index_entries[idx].pos, SEEK_SET);
1641  } else {
1642  if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1643  return ret;
1644  }
1645 
1646  reset_packet_state(s);
1647 
1648  return 0;
1649 }
1650 
1652 {
1653  int j, ret;
1654  const GUIDParseTable *g;
1655 
1656  swap_guid(guid);
1657  g = gdef;
1658  for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1659  if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1660  return g;
1661  g++;
1662  }
1663 
1664  return NULL;
1665 }
1666 
1668 {
1669  ASFContext *asf = s->priv_data;
1670  AVIOContext *pb = s->pb;
1671  const GUIDParseTable *g = NULL;
1672  ff_asf_guid guid;
1673  int ret;
1674 
1675  if (offset > INT64_MAX - size)
1676  return AVERROR_INVALIDDATA;
1677 
1678  while (avio_tell(pb) <= offset + size) {
1679  if (avio_tell(pb) == asf->offset)
1680  break;
1681  asf->offset = avio_tell(pb);
1682  if ((ret = ff_get_guid(pb, &guid)) < 0)
1683  return ret;
1684  g = find_guid(guid);
1685  if (g) {
1686  if ((ret = g->read_object(s, g)) < 0)
1687  return ret;
1688  } else {
1689  GUIDParseTable g2;
1690 
1691  g2.name = "Unknown";
1692  g2.is_subobject = 1;
1693  asf_read_unknown(s, &g2);
1694  }
1695  }
1696 
1697  return 0;
1698 }
1699 
1701 {
1702  ASFContext *asf = s->priv_data;
1703  AVIOContext *pb = s->pb;
1704  const GUIDParseTable *g = NULL;
1705  ff_asf_guid guid;
1706  int i, ret;
1707  uint64_t size;
1708 
1709  asf->preroll = 0;
1710  asf->is_simple_index = 0;
1711  ff_get_guid(pb, &guid);
1712  if (ff_guidcmp(&guid, &ff_asf_header))
1713  return AVERROR_INVALIDDATA;
1714  avio_skip(pb, 8); // skip header object size
1715  avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1716  asf->data_reached = 0;
1717 
1718  /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1719  * for the first time,
1720  * Index object is processed and got eof and then seeking back to the Data is performed.
1721  */
1722  while (1) {
1723  // for the cases when object size is invalid
1724  if (avio_tell(pb) == asf->offset)
1725  break;
1726  asf->offset = avio_tell(pb);
1727  if ((ret = ff_get_guid(pb, &guid)) < 0) {
1728  if (ret == AVERROR_EOF && asf->data_reached)
1729  break;
1730  else
1731  goto failed;
1732  }
1733  g = find_guid(guid);
1734  if (g) {
1735  asf->unknown_offset = asf->offset;
1736  asf->is_header = 1;
1737  if ((ret = g->read_object(s, g)) < 0)
1738  goto failed;
1739  } else {
1740  size = avio_rl64(pb);
1741  align_position(pb, asf->offset, size);
1742  }
1743  if (asf->data_reached &&
1744  (!(pb->seekable & AVIO_SEEKABLE_NORMAL) ||
1745  (asf->b_flags & ASF_FLAG_BROADCAST)))
1746  break;
1747  }
1748 
1749  if (!asf->data_reached) {
1750  av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1751  ret = AVERROR_INVALIDDATA;
1752  goto failed;
1753  }
1754  if (pb->seekable & AVIO_SEEKABLE_NORMAL)
1755  avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1756 
1757  for (i = 0; i < asf->nb_streams; i++) {
1758  const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1759  AVStream *st = s->streams[asf->asf_st[i]->index];
1760  set_language(s, rfc1766, &st->metadata);
1761  }
1762 
1763  for (i = 0; i < ASF_MAX_STREAMS; i++) {
1764  AVStream *st = NULL;
1765 
1766  st = find_stream(s, i);
1767  if (st) {
1769  if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1772  }
1773  }
1774  }
1775 
1776  return 0;
1777 
1778 failed:
1779  asf_read_close(s);
1780  return ret;
1781 }
1782 
1784  .name = "asf_o",
1785  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1786  .priv_data_size = sizeof(ASFContext),
1787  .read_probe = asf_probe,
1791  .read_timestamp = asf_read_timestamp,
1794 };
int nb_streams
Definition: asfdec_o.c:121
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:160
static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:832
#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:468
static int asf_read_close(AVFormatContext *s)
Definition: asfdec_o.c:1511
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define ASF_BYTE_ARRAY
Definition: asfdec_o.c:48
static struct @314 state
uint8_t stream_index
Definition: asfdec_o.c:77
static int asf_read_packet_header(AVFormatContext *s)
Definition: asfdec_o.c:1348
int size
int64_t data_offset
Definition: asfdec_o.c:113
static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:174
#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:168
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:2052
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3165
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:4948
const char * g
Definition: vf_curves.c:115
const char * desc
Definition: nvenc.c:79
int64_t pos
Definition: avformat.h:805
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:224
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:938
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:356
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:241
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1105
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:217
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:329
const char * name
Definition: asfdec_o.c:59
static void get_id3_tag(AVFormatContext *s, int len)
Definition: asfdec_o.c:455
#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:480
static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:715
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:1143
ASFStreamData asf_sd[ASF_MAX_STREAMS]
Definition: asfdec_o.c:120
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:139
static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:900
Macro definitions for various function/variable attributes.
int in_asf_read_unknown
Definition: asfdec_o.c:116
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:4654
Format I/O context.
Definition: avformat.h:1351
static const GUIDParseTable * find_guid(ff_asf_guid guid)
Definition: asfdec_o.c:1651
#define gmtime_r
Definition: time_internal.h:34
char str[32]
Definition: internal.h:48
#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:467
Public dictionary API.
static int64_t start_time
Definition: ffplay.c:332
static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:572
uint8_t
static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
Definition: asfdec_o.c:321
uint8_t stream_index
Definition: asfdec_o.c:73
static int nb_streams
Definition: ffprobe.c:282
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: codec_par.h:126
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:552
int is_simple_index
Definition: asfdec_o.c:96
AVOptions.
uint8_t dts_delta
Definition: asfdec_o.c:128
#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:4526
int64_t send_time
Definition: asfdec_o.c:102
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:926
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1180
uint8_t * data
Definition: packet.h:355
int64_t offset
Definition: asfdec_o.c:111
int64_t packet_offset
Definition: asfdec_o.c:130
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:663
static void reset_packet_state(AVFormatContext *s)
Definition: asfdec_o.c:1528
uint32_t tag
Definition: movenc.c:1532
#define AVERROR_EOF
End of file.
Definition: error.h:55
enum AVCodecID id
Definition: internal.h:49
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:307
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
uint32_t pad_len
Definition: asfdec_o.c:131
AVRational aspect_ratio
Definition: asfdec_o.c:91
static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:619
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
#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:452
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
int16_t lang_idx
Definition: asfdec_o.c:84
#define AVINDEX_KEYFRAME
Definition: avformat.h:812
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
#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:1591
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:2169
#define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE
Definition: asf.h:148
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
int type
Definition: asfdec_o.c:79
#define AVERROR(e)
Definition: error.h:43
#define ASF_QWORD
Definition: asfdec_o.c:45
uint64_t preroll
Definition: asfdec_o.c:99
const char * ff_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
Convert a language code to a target codespace.
Definition: avlanguage.c:736
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
void ff_asfcrypt_dec(const uint8_t key[20], uint8_t *data, int len)
Definition: asfcrypt.c:147
unsigned int pos
Definition: spdifenc.c:412
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:499
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1124
int64_t sub_dts
Definition: asfdec_o.c:127
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
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:93
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:949
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:123
int index
Definition: asfdec_o.c:78
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
Definition: asfdec_o.c:1385
#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:443
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:131
common internal API header
static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1165
#define ASF_FLAG_BROADCAST
Definition: asfdec_o.c:47
static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1216
static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec_o.c:1268
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
static int asf_read_value(AVFormatContext *s, const uint8_t *name, uint16_t val_len, int type, AVDictionary **met)
Definition: asfdec_o.c:280
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:962
#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE
Definition: asfdec_o.c:56
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
uint32_t frame_num
Definition: asfdec_o.c:68
AVInputFormat ff_asf_o_demuxer
Definition: asfdec_o.c:1783
int64_t dts
Definition: asfdec_o.c:67
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:207
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:1064
enum ASFContext::@239 state
#define s(width, name)
Definition: cbs_vp9.c:257
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:819
AVDictionary * metadata
Definition: avformat.h:940
static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index, int64_t *pos, int64_t pos_limit)
Definition: asfdec_o.c:1571
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: asfdec_o.c:1630
#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:844
static int asf_probe(const AVProbeData *pd)
Definition: asfdec_o.c:151
unsigned int nb_sub
Definition: asfdec_o.c:136
#define ASF_BOOL
Definition: asfdec_o.c:41
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
#define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT
Definition: asf.h:108
uint8_t ff_asf_guid[16]
Definition: riff.h:92
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:132
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
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:129
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
const ff_asf_guid ff_asf_video_stream
Definition: asf.c:53
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
long long int64_t
Definition: coverity.c:34
static int parse_video_info(AVFormatContext *avfmt, AVIOContext *pb, AVStream *st)
Definition: asfdec_o.c:691
static int asf_read_picture(AVFormatContext *s, int len)
Definition: asfdec_o.c:365
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:469
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:1140
int64_t first_packet_offset
Definition: asfdec_o.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:70
int nb_index_entries
Definition: avformat.h:1107
double value
Definition: eval.c:98
static const GUIDParseTable gdef[]
Definition: asfdec_o.c:1014
AVDictionary * asf_met
Definition: asfdec_o.c:90
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec_o.c:1427
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#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:135
cl_device_type type
uint64_t unknown_size
Definition: asfdec_o.c:109
AVMediaType
Definition: avutil.h:199
#define snprintf
Definition: snprintf.h:34
uint16_t mult_sub_len
Definition: asfdec_o.c:137
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
uint32_t b_flags
Definition: asfdec_o.c:105
ASFPacket pkt
Definition: asfdec_o.c:85
static int64_t pts
int64_t unknown_offset
Definition: asfdec_o.c:115
static void reset_packet(ASFPacket *asf_pkt)
Definition: asfdec_o.c:1131
#define flags(name, subs,...)
Definition: cbs_av1.c:576
int duration
Definition: asfdec_o.c:71
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
int is_header
Definition: asfdec_o.c:97
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
const uint8_t * key
Definition: avformat.h:1527
int64_t bitrate
Definition: h264_levels.c:131
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
Main libavformat public API header.
int
#define ASF_MAX_STREAMS
Definition: asfdec_o.c:52
uint64_t sub_header_offset
Definition: asfdec_o.c:126
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:279
static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len, unsigned char *ch, uint16_t buflen)
Definition: asfdec_o.c:266
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:915
static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
Definition: asfdec_o.c:1076
#define ASF_GUID
Definition: asfdec_o.c:43
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:3346
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata.
Definition: id3v2.c:1118
int den
Denominator.
Definition: rational.h:60
#define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE
Definition: asf.h:158
int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size)
Read BITMAPINFOHEADER structure and set AVStream codec width, height and bits_per_encoded_sample fiel...
Definition: riffdec.c:209
static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:648
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
int len
static int asf_set_metadata(AVFormatContext *s, const uint8_t *name, int type, AVDictionary **met)
Definition: asfdec_o.c:344
void * priv_data
Format private data.
Definition: avformat.h:1379
static AVStream * find_stream(AVFormatContext *s, uint16_t st_num)
Definition: asfdec_o.c:536
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
int duration
Definition: asfdec_o.c:103
uint64_t nb_mult_left
Definition: asfdec_o.c:138
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:650
#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
Codec parameters associated with this stream.
Definition: avformat.h:1023
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:107
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: packet.h:357
int(* read_object)(AVFormatContext *, const struct GUIDParseTable *)
Definition: asfdec_o.c:61
int flags
Definition: asfdec_o.c:69
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:118
enum AVCodecID id
This structure stores compressed data.
Definition: packet.h:332
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:755
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:958
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
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:2184
#define av_unused
Definition: attributes.h:131
static int asf_read_header(AVFormatContext *s)
Definition: asfdec_o.c:1700
static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
Definition: asfdec_o.c:1667
static uint8_t tmp[11]
Definition: aes_ctr.c:26