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asfdec_o.c
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1 /*
2  * Microsoft Advanced Streaming Format demuxer
3  * Copyright (c) 2014 Alexandra Hájková
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/attributes.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/bswap.h"
26 #include "libavutil/common.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/internal.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/opt.h"
32 
33 #include "avformat.h"
34 #include "avio_internal.h"
35 #include "avlanguage.h"
36 #include "id3v2.h"
37 #include "internal.h"
38 #include "riff.h"
39 #include "asf.h"
40 #include "asfcrypt.h"
41 
42 #define ASF_BOOL 0x2
43 #define ASF_WORD 0x5
44 #define ASF_GUID 0x6
45 #define ASF_DWORD 0x3
46 #define ASF_QWORD 0x4
47 #define ASF_UNICODE 0x0
48 #define ASF_FLAG_BROADCAST 0x1
49 #define ASF_BYTE_ARRAY 0x1
50 #define ASF_TYPE_AUDIO 0x2
51 #define ASF_TYPE_VIDEO 0x1
52 #define ASF_STREAM_NUM 0x7F
53 #define ASF_MAX_STREAMS 128
54 #define BMP_HEADER_SIZE 40
55 #define ASF_NUM_OF_PAYLOADS 0x3F
56 #define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
57 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
58 
59 typedef struct GUIDParseTable {
60  const char *name;
62  int (*read_object)(AVFormatContext *, const struct GUIDParseTable *);
65 
66 typedef struct ASFPacket {
68  int64_t dts;
69  uint32_t frame_num; // ASF payloads with the same number are parts of the same frame
70  int flags;
71  int data_size;
72  int duration;
73  int size_left;
75 } ASFPacket;
76 
77 typedef struct ASFStream {
78  uint8_t stream_index; // from packet header
79  int index; // stream index in AVFormatContext, set in asf_read_stream_properties
80  int type;
81  int indexed; // added index entries from the Simple Index Object or not
82  int8_t span; // for deinterleaving
83  uint16_t virtual_pkt_len;
85  int16_t lang_idx;
87 } ASFStream;
88 
89 typedef struct ASFStreamData{
90  char langs[32];
91  AVDictionary *asf_met; // for storing per-stream metadata
94 
95 typedef struct ASFContext {
97  int is_simple_index; // is simple index present or not 1/0
98  int is_header;
99 
100  uint64_t preroll;
101  uint64_t nb_packets; // ASF packets
102  uint32_t packet_size;
103  int64_t send_time;
104  int duration;
105 
106  uint32_t b_flags; // flags with broadcast flag
107  uint32_t prop_flags; // file properties object flags
108 
109  uint64_t data_size; // data object size
110  uint64_t unknown_size; // size of the unknown object
111 
112  int64_t offset; // offset of the current object
113 
114  int64_t data_offset;
115  int64_t first_packet_offset; // packet offset
116  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
122 
123  int stream_index; // from packet header, for the subpayload case
124 
125  // packet parameteres
126  uint64_t sub_header_offset; // offset of subplayload header
127  int64_t sub_dts;
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 {
145  } state;
146 } ASFContext;
147 
148 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size);
149 static const GUIDParseTable *find_guid(ff_asf_guid guid);
150 
151 static int asf_probe(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 
160 static void swap_guid(ff_asf_guid guid)
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)
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  if ((ret = detect_unknown_subobject(s, asf->unknown_offset,
191  asf->unknown_size)) < 0)
192  return ret;
193  } else {
194  if (size < 24) {
195  av_log(s, AV_LOG_ERROR, "Too small size %"PRIu64" (< 24).\n", size);
196  return AVERROR_INVALIDDATA;
197  }
198  avio_skip(pb, size - 24);
199  }
200 
201  return 0;
202 }
203 
204 static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
205 {
206  char *q = buf;
207  int ret = 0;
208  if (buflen <= 0)
209  return AVERROR(EINVAL);
210  while (ret + 1 < maxlen) {
211  uint8_t tmp;
212  uint32_t ch;
213  GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;);
214  PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)
215  }
216  *q = 0;
217 
218  return ret;
219 }
220 
222 {
223  ASFContext *asf = s->priv_data;
224  AVIOContext *pb = s->pb;
225  uint64_t size = avio_rl64(pb);
226  int i, nb_markers, ret;
227  size_t len;
228  char name[1024];
229 
230  avio_skip(pb, 8);
231  avio_skip(pb, 8); // skip reserved GUID
232  nb_markers = avio_rl32(pb);
233  avio_skip(pb, 2); // skip reserved field
234  len = avio_rl16(pb);
235  for (i = 0; i < len; i++)
236  avio_skip(pb, 1);
237 
238  for (i = 0; i < nb_markers; i++) {
239  int64_t pts;
240 
241  avio_skip(pb, 8);
242  pts = avio_rl64(pb);
243  pts -= asf->preroll * 10000;
244  avio_skip(pb, 2); // entry length
245  avio_skip(pb, 4); // send time
246  avio_skip(pb, 4); // flags
247  len = avio_rl32(pb);
248 
249  if ((ret = avio_get_str16le(pb, len, name,
250  sizeof(name))) < len)
251  avio_skip(pb, len - ret);
252  avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
254  }
255  align_position(pb, asf->offset, size);
256 
257  return 0;
258 }
259 
260 static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
261  unsigned char *ch, uint16_t buflen)
262 {
263  AVIOContext *pb = s->pb;
264 
265  avio_get_str16le(pb, len, ch, buflen);
266  if (ch[0]) {
267  if (av_dict_set(&s->metadata, title, ch, 0) < 0)
268  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
269  }
270 
271  return 0;
272 }
273 
274 static int asf_read_value(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
275  uint16_t val_len, int type, AVDictionary **met)
276 {
277  int ret;
278  uint8_t *value;
279  uint16_t buflen = 2 * val_len + 1;
280  AVIOContext *pb = s->pb;
281 
282  value = av_malloc(buflen);
283  if (!value)
284  return AVERROR(ENOMEM);
285  if (type == ASF_UNICODE) {
286  // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
287  if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
288  goto failed;
289  if (av_dict_set(met, name, value, 0) < 0)
290  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
291  } else {
292  char buf[256];
293  if (val_len > sizeof(buf)) {
294  ret = AVERROR_INVALIDDATA;
295  goto failed;
296  }
297  if ((ret = avio_read(pb, value, val_len)) < 0)
298  goto failed;
299  if (ret < 2 * val_len)
300  value[ret] = '\0';
301  else
302  value[2 * val_len - 1] = '\0';
303  snprintf(buf, sizeof(buf), "%s", value);
304  if (av_dict_set(met, name, buf, 0) < 0)
305  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
306  }
307  av_freep(&value);
308 
309  return 0;
310 
311 failed:
312  av_freep(&value);
313  return ret;
314 }
315 static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
316 {
317 
318  switch (type) {
319  case ASF_BOOL:
320  *value = avio_rl16(pb);
321  break;
322  case ASF_DWORD:
323  *value = avio_rl32(pb);
324  break;
325  case ASF_QWORD:
326  *value = avio_rl64(pb);
327  break;
328  case ASF_WORD:
329  *value = avio_rl16(pb);
330  break;
331  default:
332  return AVERROR_INVALIDDATA;
333  }
334 
335  return 0;
336 }
337 
339  uint16_t name_len, int type, AVDictionary **met)
340 {
341  AVIOContext *pb = s->pb;
342  uint64_t value;
343  char buf[32];
344  int ret;
345 
346  ret = asf_read_generic_value(pb, type, &value);
347  if (ret < 0)
348  return ret;
349 
350  snprintf(buf, sizeof(buf), "%"PRIu64, value);
351  if (av_dict_set(met, name, buf, 0) < 0)
352  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
353 
354  return 0;
355 }
356 
357 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
358  * but in reality this is only loosely similar */
360 {
361  ASFContext *asf = s->priv_data;
362  AVPacket pkt = { 0 };
363  const CodecMime *mime = ff_id3v2_mime_tags;
364  enum AVCodecID id = AV_CODEC_ID_NONE;
365  char mimetype[64];
366  uint8_t *desc = NULL;
367  AVStream *st = NULL;
368  int ret, type, picsize, desc_len;
369  ASFStream *asf_st;
370 
371  /* type + picsize + mime + desc */
372  if (len < 1 + 4 + 2 + 2) {
373  av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
374  return AVERROR_INVALIDDATA;
375  }
376 
377  /* picture type */
378  type = avio_r8(s->pb);
379  len--;
380  if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
381  av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
382  type = 0;
383  }
384 
385  /* picture data size */
386  picsize = avio_rl32(s->pb);
387  len -= 4;
388 
389  /* picture MIME type */
390  len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
391  while (mime->id != AV_CODEC_ID_NONE) {
392  if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
393  id = mime->id;
394  break;
395  }
396  mime++;
397  }
398  if (id == AV_CODEC_ID_NONE) {
399  av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
400  mimetype);
401  return 0;
402  }
403 
404  if (picsize >= len) {
405  av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
406  picsize, len);
407  return AVERROR_INVALIDDATA;
408  }
409 
410  /* picture description */
411  desc_len = (len - picsize) * 2 + 1;
412  desc = av_malloc(desc_len);
413  if (!desc)
414  return AVERROR(ENOMEM);
415  len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
416 
417  ret = av_get_packet(s->pb, &pkt, picsize);
418  if (ret < 0)
419  goto fail;
420 
421  st = avformat_new_stream(s, NULL);
422  if (!st) {
423  ret = AVERROR(ENOMEM);
424  goto fail;
425  }
426  asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
427  asf_st = asf->asf_st[asf->nb_streams];
428  if (!asf_st) {
429  ret = AVERROR(ENOMEM);
430  goto fail;
431  }
432 
434  st->codec->codec_type = asf_st->type = AVMEDIA_TYPE_VIDEO;
435  st->codec->codec_id = id;
436  st->attached_pic = pkt;
437  st->attached_pic.stream_index = asf_st->index = st->index;
439 
440  asf->nb_streams++;
441 
442  if (*desc) {
443  if (av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL) < 0)
444  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
445  } else
446  av_freep(&desc);
447 
448  if (av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0) < 0)
449  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
450 
451  return 0;
452 
453 fail:
454  av_freep(&desc);
455  av_free_packet(&pkt);
456  return ret;
457 }
458 
459 static void get_id3_tag(AVFormatContext *s, int len)
460 {
461  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
462 
463  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
464  if (id3v2_extra_meta)
465  ff_id3v2_parse_apic(s, &id3v2_extra_meta);
466  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
467 }
468 
469 static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
470  uint16_t val_len, uint16_t type, AVDictionary **met)
471 {
472  int ret;
473  ff_asf_guid guid;
474 
475  if (val_len) {
476  switch (type) {
477  case ASF_UNICODE:
478  asf_read_value(s, name, name_len, val_len, type, met);
479  break;
480  case ASF_BYTE_ARRAY:
481  if (!strcmp(name, "WM/Picture")) // handle cover art
482  asf_read_picture(s, val_len);
483  else if (!strcmp(name, "ID3")) // handle ID3 tag
484  get_id3_tag(s, val_len);
485  else
486  asf_read_value(s, name, name_len, val_len, type, met);
487  break;
488  case ASF_GUID:
489  ff_get_guid(s->pb, &guid);
490  break;
491  default:
492  if ((ret = asf_set_metadata(s, name, name_len, type, met)) < 0)
493  return ret;
494  break;
495  }
496  }
497 
498  return 0;
499 }
500 
502 {
503  ASFContext *asf = s->priv_data;
504  AVIOContext *pb = s->pb;
505  uint64_t size = avio_rl64(pb);
506  uint16_t nb_desc = avio_rl16(pb);
507  int i, ret;
508 
509  for (i = 0; i < nb_desc; i++) {
510  uint16_t name_len, type, val_len;
511  uint8_t *name = NULL;
512 
513  name_len = avio_rl16(pb);
514  if (!name_len)
515  return AVERROR_INVALIDDATA;
516  name = av_malloc(name_len);
517  if (!name)
518  return AVERROR(ENOMEM);
519  avio_get_str16le(pb, name_len, name,
520  name_len);
521  type = avio_rl16(pb);
522  // BOOL values are 16 bits long in the Metadata Object
523  // but 32 bits long in the Extended Content Description Object
524  if (type == ASF_BOOL)
525  type = ASF_DWORD;
526  val_len = avio_rl16(pb);
527 
528  ret = process_metadata(s, name, name_len, val_len, type, &s->metadata);
529  av_freep(&name);
530  if (ret < 0)
531  return ret;
532  }
533 
534  align_position(pb, asf->offset, size);
535  return 0;
536 }
537 
538 static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
539 {
540  AVStream *st = NULL;
541  ASFContext *asf = s->priv_data;
542  int i;
543 
544  for (i = 0; i < asf->nb_streams; i++) {
545  if (asf->asf_st[i]->stream_index == st_num) {
546  st = s->streams[asf->asf_st[i]->index];
547  break;
548  }
549  }
550 
551  return st;
552 }
553 
555 {
556  ASFContext *asf = s->priv_data;
557  AVIOContext *pb = s->pb;
558  uint64_t value = 0;
559  int ret;
560 
561  ret = asf_read_generic_value(pb, type, &value);
562  if (ret < 0)
563  return ret;
564 
565  if (st_num < ASF_MAX_STREAMS) {
566  if (!strcmp(name, "AspectRatioX"))
567  asf->asf_sd[st_num].aspect_ratio.num = value;
568  else
569  asf->asf_sd[st_num].aspect_ratio.den = value;
570  }
571  return 0;
572 }
573 
575 {
576  ASFContext *asf = s->priv_data;
577  AVIOContext *pb = s->pb;
578  uint64_t size = avio_rl64(pb);
579  uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
580  int i, ret;
581 
582  for (i = 0; i < nb_recs; i++) {
583  uint16_t name_len, buflen, type, val_len, st_num;
584  uint8_t *name = NULL;
585 
586  avio_skip(pb, 2); // skip reserved field
587  st_num = avio_rl16(pb);
588  name_len = avio_rl16(pb);
589  buflen = 2 * name_len + 1;
590  if (!name_len)
591  break;
592  type = avio_rl16(pb);
593  val_len = avio_rl32(pb);
594  name = av_malloc(buflen);
595  if (!name)
596  return AVERROR(ENOMEM);
597  avio_get_str16le(pb, name_len, name,
598  buflen);
599  if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
600  ret = asf_store_aspect_ratio(s, st_num, name, type);
601  if (ret < 0) {
602  av_freep(&name);
603  break;
604  }
605  } else {
606  if (st_num < ASF_MAX_STREAMS) {
607  if ((ret = process_metadata(s, name, name_len, val_len, type,
608  &asf->asf_sd[st_num].asf_met)) < 0) {
609  av_freep(&name);
610  break;
611  }
612  }
613  }
614  av_freep(&name);
615  }
616 
617  align_position(pb, asf->offset, size);
618  return 0;
619 }
620 
622 {
623  ASFContext *asf = s->priv_data;
624  AVIOContext *pb = s->pb;
625  int i;
626  static const char *const titles[] =
627  { "Title", "Author", "Copyright", "Description", "Rate" };
628  uint16_t len[5], buflen[5] = { 0 };
629  uint8_t *ch;
630  uint64_t size = avio_rl64(pb);
631 
632  for (i = 0; i < 5; i++) {
633  len[i] = avio_rl16(pb);
634  // utf8 string should be <= 2 * utf16 string, extra byte for the terminator
635  buflen[i] = 2 * len[i] + 1;
636  }
637 
638  for (i = 0; i < 5; i++) {
639  ch = av_malloc(buflen[i]);
640  if (!ch)
641  return(AVERROR(ENOMEM));
642  asf_read_metadata(s, titles[i], len[i], ch, buflen[i]);
643  av_freep(&ch);
644  }
645  align_position(pb, asf->offset, size);
646 
647  return 0;
648 }
649 
651 {
652  ASFContext *asf = s->priv_data;
653  AVIOContext *pb = s->pb;
654  time_t creation_time;
655 
656  avio_rl64(pb); // read object size
657  avio_skip(pb, 16); // skip File ID
658  avio_skip(pb, 8); // skip File size
659  creation_time = avio_rl64(pb);
660  if (!(asf->b_flags & ASF_FLAG_BROADCAST)) {
661  struct tm tmbuf;
662  struct tm *tm;
663  char buf[64];
664 
665  // creation date is in 100 ns units from 1 Jan 1601, conversion to s
666  creation_time /= 10000000;
667  // there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970
668  creation_time -= 11644473600;
669  tm = gmtime_r(&creation_time, &tmbuf);
670  if (tm) {
671  if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
672  buf[0] = '\0';
673  } else
674  buf[0] = '\0';
675  if (buf[0]) {
676  if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0)
677  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
678  }
679  }
680  asf->nb_packets = avio_rl64(pb);
681  asf->duration = avio_rl64(pb) / 10000; // stream duration
682  avio_skip(pb, 8); // skip send duration
683  asf->preroll = avio_rl64(pb);
684  asf->duration -= asf->preroll;
685  asf->b_flags = avio_rl32(pb);
686  avio_skip(pb, 4); // skip minimal packet size
687  asf->packet_size = avio_rl32(pb);
688  avio_skip(pb, 4); // skip max_bitrate
689 
690  return 0;
691 }
692 
694 {
695  uint16_t size;
696  unsigned int tag;
697 
698  st->codec->width = avio_rl32(pb);
699  st->codec->height = avio_rl32(pb);
700  avio_skip(pb, 1); // skip reserved flags
701  size = avio_rl16(pb); // size of the Format Data
702  tag = ff_get_bmp_header(pb, st, NULL);
703  st->codec->codec_tag = tag;
705 
706  if (size > BMP_HEADER_SIZE) {
707  int ret;
708  st->codec->extradata_size = size - BMP_HEADER_SIZE;
709  if (!(st->codec->extradata = av_malloc(st->codec->extradata_size +
711  st->codec->extradata_size = 0;
712  return AVERROR(ENOMEM);
713  }
714  memset(st->codec->extradata + st->codec->extradata_size , 0,
716  if ((ret = avio_read(pb, st->codec->extradata,
717  st->codec->extradata_size)) < 0)
718  return ret;
719  }
720  return 0;
721 }
722 
724 {
725  ASFContext *asf = s->priv_data;
726  AVIOContext *pb = s->pb;
727  uint64_t size;
728  uint32_t err_data_len, ts_data_len; // type specific data length
729  uint16_t flags;
730  ff_asf_guid stream_type;
731  enum AVMediaType type;
732  int i, ret;
733  uint8_t stream_index;
734  AVStream *st;
735  ASFStream *asf_st;
736 
737  // ASF file must not contain more than 128 streams according to the specification
738  if (asf->nb_streams >= ASF_MAX_STREAMS)
739  return AVERROR_INVALIDDATA;
740 
741  size = avio_rl64(pb);
742  ff_get_guid(pb, &stream_type);
743  if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
744  type = AVMEDIA_TYPE_AUDIO;
745  else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
746  type = AVMEDIA_TYPE_VIDEO;
747  else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
748  type = AVMEDIA_TYPE_VIDEO;
749  else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
750  type = AVMEDIA_TYPE_DATA;
751  else if (!ff_guidcmp(&stream_type,
753  type = AVMEDIA_TYPE_UNKNOWN;
754  else
755  return AVERROR_INVALIDDATA;
756 
757  ff_get_guid(pb, &stream_type); // error correction type
758  avio_skip(pb, 8); // skip the time offset
759  ts_data_len = avio_rl32(pb);
760  err_data_len = avio_rl32(pb);
761  flags = avio_rl16(pb); // bit 15 - Encrypted Content
762 
763  stream_index = flags & ASF_STREAM_NUM;
764  for (i = 0; i < asf->nb_streams; i++)
765  if (stream_index == asf->asf_st[i]->stream_index) {
767  "Duplicate stream found, this stream will be ignored.\n");
768  align_position(pb, asf->offset, size);
769  return 0;
770  }
771 
772  st = avformat_new_stream(s, NULL);
773  if (!st)
774  return AVERROR(ENOMEM);
775  avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
776  st->codec->codec_type = type;
777  asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
778  if (!asf->asf_st[asf->nb_streams])
779  return AVERROR(ENOMEM);
780  asf_st = asf->asf_st[asf->nb_streams];
781  asf->nb_streams++;
782  asf_st->stream_index = stream_index;
783  asf_st->index = st->index;
784  asf_st->indexed = 0;
785  st->id = flags & ASF_STREAM_NUM;
786  av_init_packet(&asf_st->pkt.avpkt);
787  asf_st->pkt.data_size = 0;
788  avio_skip(pb, 4); // skip reserved field
789 
790  switch (type) {
791  case AVMEDIA_TYPE_AUDIO:
792  asf_st->type = AVMEDIA_TYPE_AUDIO;
793  if ((ret = ff_get_wav_header(s, pb, st->codec, ts_data_len, 0)) < 0)
794  return ret;
795  break;
796  case AVMEDIA_TYPE_VIDEO:
797  asf_st->type = AVMEDIA_TYPE_VIDEO;
798  if ((ret = parse_video_info(pb, st)) < 0)
799  return ret;
800  break;
801  default:
802  avio_skip(pb, ts_data_len);
803  break;
804  }
805 
806  if (err_data_len) {
807  if (type == AVMEDIA_TYPE_AUDIO) {
808  uint8_t span = avio_r8(pb);
809  if (span > 1) {
810  asf_st->span = span;
811  asf_st->virtual_pkt_len = avio_rl16(pb);
812  asf_st->virtual_chunk_len = avio_rl16(pb);
813  if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
814  return AVERROR_INVALIDDATA;
815  avio_skip(pb, err_data_len - 5);
816  } else
817  avio_skip(pb, err_data_len - 1);
818  } else
819  avio_skip(pb, err_data_len);
820  }
821 
822  align_position(pb, asf->offset, size);
823 
824  return 0;
825 }
826 
827 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
828 {
829  // language abbr should contain at least 2 chars
830  if (rfc1766 && strlen(rfc1766) > 1) {
831  const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
832  const char *iso6392 = av_convert_lang_to(primary_tag,
834  if (iso6392)
835  if (av_dict_set(met, "language", iso6392, 0) < 0)
836  av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
837  }
838 }
839 
841 {
842  ASFContext *asf = s->priv_data;
843  AVIOContext *pb = s->pb;
844  AVStream *st = NULL;
845  ff_asf_guid guid;
846  uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
847  int i, ret;
848  uint32_t bitrate;
849  uint64_t start_time, end_time, time_per_frame;
850  uint64_t size = avio_rl64(pb);
851 
852  start_time = avio_rl64(pb);
853  end_time = avio_rl64(pb);
854  bitrate = avio_rl32(pb);
855  avio_skip(pb, 28); // skip some unused values
856  st_num = avio_rl16(pb);
857  st_num &= ASF_STREAM_NUM;
858  lang_idx = avio_rl16(pb); // Stream Language ID Index
859  for (i = 0; i < asf->nb_streams; i++) {
860  if (st_num == asf->asf_st[i]->stream_index) {
861  st = s->streams[asf->asf_st[i]->index];
862  asf->asf_st[i]->lang_idx = lang_idx;
863  break;
864  }
865  }
866  time_per_frame = avio_rl64(pb); // average time per frame
867  if (st) {
868  st->start_time = start_time;
869  st->duration = end_time - start_time;
870  st->codec->bit_rate = bitrate;
871  st->avg_frame_rate.num = 10000000;
872  st->avg_frame_rate.den = time_per_frame;
873  }
874  nb_st_name = avio_rl16(pb);
875  nb_pay_exts = avio_rl16(pb);
876  for (i = 0; i < nb_st_name; i++) {
877  uint16_t len;
878 
879  avio_rl16(pb); // Language ID Index
880  len = avio_rl16(pb);
881  avio_skip(pb, len);
882  }
883 
884  for (i = 0; i < nb_pay_exts; i++) {
885  uint32_t len;
886  avio_skip(pb, 16); // Extension System ID
887  avio_skip(pb, 2); // Extension Data Size
888  len = avio_rl32(pb);
889  avio_skip(pb, len);
890  }
891 
892  if ((ret = ff_get_guid(pb, &guid)) < 0) {
893  align_position(pb, asf->offset, size);
894 
895  return 0;
896  }
897 
898  g = find_guid(guid);
899  if (g && !(strcmp(g->name, "Stream Properties"))) {
900  if ((ret = g->read_object(s, g)) < 0)
901  return ret;
902  }
903 
904  align_position(pb, asf->offset, size);
905  return 0;
906 }
907 
909 {
910  ASFContext *asf = s->priv_data;
911  AVIOContext *pb = s->pb;
912  int i, ret;
913  uint64_t size = avio_rl64(pb);
914  uint16_t nb_langs = avio_rl16(pb);
915 
916  if (nb_langs < ASF_MAX_STREAMS) {
917  for (i = 0; i < nb_langs; i++) {
918  size_t len;
919  len = avio_r8(pb);
920  if (!len)
921  len = 6;
922  if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
923  sizeof(asf->asf_sd[i].langs))) < 0) {
924  return ret;
925  }
926  }
927  }
928 
929  align_position(pb, asf->offset, size);
930  return 0;
931 }
932 
933 // returns data object offset when reading this object for the first time
935 {
936  ASFContext *asf = s->priv_data;
937  AVIOContext *pb = s->pb;
938  uint64_t size = asf->data_size = avio_rl64(pb);
939  int i;
940 
941  if (!asf->data_reached) {
942  asf->data_reached = 1;
943  asf->data_offset = asf->offset;
944  }
945 
946  for (i = 0; i < asf->nb_streams; i++) {
947  if (!(asf->b_flags & ASF_FLAG_BROADCAST))
948  s->streams[i]->duration = asf->duration;
949  }
950  asf->nb_mult_left = 0;
951  asf->sub_left = 0;
952  asf->state = PARSE_PACKET_HEADER;
953  asf->return_subpayload = 0;
954  asf->packet_size_internal = 0;
955  avio_skip(pb, 16); // skip File ID
956  size = avio_rl64(pb); // Total Data Packets
957  if (size != asf->nb_packets)
959  "Number of Packets from File Properties Object is not equal to Total"
960  "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
961  size, asf->nb_packets);
962  avio_skip(pb, 2); // skip reserved field
963  asf->first_packet_offset = avio_tell(pb);
964  if (pb->seekable && !(asf->b_flags & ASF_FLAG_BROADCAST))
965  align_position(pb, asf->offset, asf->data_size);
966 
967  return 0;
968 }
969 
971 {
972  ASFContext *asf = s->priv_data;
973  AVIOContext *pb = s->pb;
974  AVStream *st = NULL;
975  uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
976  uint32_t pkt_num, nb_entries;
977  int32_t prev_pkt_num = -1;
978  int i, ret;
979  uint64_t size = avio_rl64(pb);
980 
981  // simple index objects should be ordered by stream number, this loop tries to find
982  // the first not indexed video stream
983  for (i = 0; i < asf->nb_streams; i++) {
984  if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
985  asf->asf_st[i]->indexed = 1;
986  st = s->streams[asf->asf_st[i]->index];
987  break;
988  }
989  }
990  if (!st) {
991  avio_skip(pb, size - 24); // if there's no video stream, skip index object
992  return 0;
993  }
994  avio_skip(pb, 16); // skip File ID
995  interval = avio_rl64(pb);
996  avio_skip(pb, 4);
997  nb_entries = avio_rl32(pb);
998  for (i = 0; i < nb_entries; i++) {
999  pkt_num = avio_rl32(pb);
1000  ret = avio_skip(pb, 2);
1001  if (ret < 0) {
1002  av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
1003  return ret;
1004  }
1005  if (prev_pkt_num != pkt_num) {
1007  pkt_num, av_rescale(interval, i, 10000),
1008  asf->packet_size, 0, AVINDEX_KEYFRAME);
1009  prev_pkt_num = pkt_num;
1010  }
1011  }
1012  asf->is_simple_index = 1;
1013  align_position(pb, asf->offset, size);
1014 
1015  return 0;
1016 }
1017 
1018 static const GUIDParseTable gdef[] = {
1019  { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
1020  { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
1021  { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
1022  { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
1023  { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
1024  { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
1025  { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
1026  { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
1027  { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1028  { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
1029  { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1030  { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
1031  { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
1032  { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1033  { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
1034  { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1035  { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
1036  { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
1037  { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1038  { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
1039  { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1040  { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1041  { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
1042  { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1043  { "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 },
1044  { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
1045  { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
1046  { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
1047  { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1048  { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
1049  { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
1050  { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
1051  { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1052  { "Content Encryption System Windows Media DRM Network Devices",
1053  { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
1054  { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1055  { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1056  { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1057  { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1058  { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1059  { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
1060  { "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 },
1061  { "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 },
1062  { "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 },
1063  { "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 },
1064  { "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 },
1065  { "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 },
1066 };
1067 
1068 #define READ_LEN(flag, name, len) \
1069  do { \
1070  if ((flag) == name ## IS_BYTE) \
1071  len = avio_r8(pb); \
1072  else if ((flag) == name ## IS_WORD) \
1073  len = avio_rl16(pb); \
1074  else if ((flag) == name ## IS_DWORD) \
1075  len = avio_rl32(pb); \
1076  else \
1077  len = 0; \
1078  } while(0)
1079 
1080 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
1081 {
1082  ASFContext *asf = s->priv_data;
1083  AVIOContext *pb = s->pb;
1084  uint8_t sub_len;
1085  int ret, i;
1086 
1087  if (is_header) {
1088  asf->dts_delta = avio_r8(pb);
1089  if (asf->nb_mult_left) {
1090  asf->mult_sub_len = avio_rl16(pb); // total
1091  }
1092  asf->sub_header_offset = avio_tell(pb);
1093  asf->nb_sub = 0;
1094  asf->sub_left = 1;
1095  }
1096  sub_len = avio_r8(pb);
1097  if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
1098  return ret;
1099  for (i = 0; i < asf->nb_streams; i++) {
1100  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1101  pkt->stream_index = asf->asf_st[i]->index;
1102  break;
1103  }
1104  }
1105  asf->return_subpayload = 1;
1106  if (!sub_len)
1107  asf->return_subpayload = 0;
1108 
1109  if (sub_len)
1110  asf->nb_sub++;
1111  pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1112  if (asf->nb_mult_left && (avio_tell(pb) >=
1113  (asf->sub_header_offset + asf->mult_sub_len))) {
1114  asf->sub_left = 0;
1115  asf->nb_mult_left--;
1116  }
1117  if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1118  asf->sub_left = 0;
1119  if (!asf->nb_mult_left) {
1120  avio_skip(pb, asf->pad_len);
1121  if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1122  if (!asf->packet_size)
1123  return AVERROR_INVALIDDATA;
1125  "Position %"PRId64" wrong, should be %"PRId64"\n",
1126  avio_tell(pb), asf->packet_offset + asf->packet_size);
1127  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1128  }
1129  }
1130  }
1131 
1132  return 0;
1133 }
1134 
1135 static void reset_packet(ASFPacket *asf_pkt)
1136 {
1137  asf_pkt->size_left = 0;
1138  asf_pkt->data_size = 0;
1139  asf_pkt->duration = 0;
1140  asf_pkt->flags = 0;
1141  asf_pkt->dts = 0;
1142  asf_pkt->duration = 0;
1143  av_free_packet(&asf_pkt->avpkt);
1144  av_init_packet(&asf_pkt->avpkt);
1145 }
1146 
1148 {
1149  ASFContext *asf = s->priv_data;
1150  AVIOContext *pb = s->pb;
1151  int ret, data_size;
1152 
1153  if (!asf_pkt->data_size) {
1154  data_size = avio_rl32(pb); // read media object size
1155  if (data_size <= 0)
1156  return AVERROR_INVALIDDATA;
1157  if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1158  return ret;
1159  asf_pkt->data_size = asf_pkt->size_left = data_size;
1160  } else
1161  avio_skip(pb, 4); // reading of media object size is already done
1162  asf_pkt->dts = avio_rl32(pb); // read presentation time
1163  if (asf->rep_data_len && (asf->rep_data_len >= 8))
1164  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1165 
1166  return 0;
1167 }
1168 
1170  ASFPacket *asf_pkt)
1171 {
1172  ASFContext *asf = s->priv_data;
1173  AVIOContext *pb = s->pb;
1174  uint16_t pay_len;
1175  unsigned char *p;
1176  int ret;
1177  int skip = 0;
1178 
1179  // if replicated length is 1, subpayloads are present
1180  if (asf->rep_data_len == 1) {
1181  asf->sub_left = 1;
1182  asf->state = READ_MULTI_SUB;
1183  pkt->flags = asf_pkt->flags;
1184  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1185  return ret;
1186  } else {
1187  if (asf->rep_data_len)
1188  if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1189  return ret;
1190  pay_len = avio_rl16(pb); // payload length should be WORD
1191  if (pay_len > asf->packet_size) {
1192  av_log(s, AV_LOG_ERROR,
1193  "Error: invalid data packet size, pay_len %"PRIu16", "
1194  "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1195  pay_len, asf->packet_size, avio_tell(pb));
1196  return AVERROR_INVALIDDATA;
1197  }
1198  p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1199  if (pay_len > asf_pkt->size_left) {
1200  av_log(s, AV_LOG_ERROR,
1201  "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1202  pay_len, asf_pkt->size_left);
1203  skip = pay_len - asf_pkt->size_left;
1204  pay_len = asf_pkt->size_left;
1205  }
1206  if (asf_pkt->size_left <= 0)
1207  return AVERROR_INVALIDDATA;
1208  if ((ret = avio_read(pb, p, pay_len)) < 0)
1209  return ret;
1210  if (s->key && s->keylen == 20)
1211  ff_asfcrypt_dec(s->key, p, ret);
1212  avio_skip(pb, skip);
1213  asf_pkt->size_left -= pay_len;
1214  asf->nb_mult_left--;
1215  }
1216 
1217  return 0;
1218 }
1219 
1221  ASFPacket *asf_pkt)
1222 {
1223  ASFContext *asf = s->priv_data;
1224  AVIOContext *pb = s->pb;
1225  int64_t offset;
1226  uint64_t size;
1227  unsigned char *p;
1228  int ret, data_size;
1229 
1230  if (!asf_pkt->data_size) {
1231  data_size = avio_rl32(pb); // read media object size
1232  if (data_size <= 0)
1233  return AVERROR_EOF;
1234  if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1235  return ret;
1236  asf_pkt->data_size = asf_pkt->size_left = data_size;
1237  } else
1238  avio_skip(pb, 4); // skip media object size
1239  asf_pkt->dts = avio_rl32(pb); // read presentation time
1240  if (asf->rep_data_len >= 8)
1241  avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1242  offset = avio_tell(pb);
1243 
1244  // size of the payload - size of the packet without header and padding
1245  if (asf->packet_size_internal)
1246  size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1247  else
1248  size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1249  if (size > asf->packet_size) {
1250  av_log(s, AV_LOG_ERROR,
1251  "Error: invalid data packet size, offset %"PRId64".\n",
1252  avio_tell(pb));
1253  return AVERROR_INVALIDDATA;
1254  }
1255  p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1256  if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1257  return AVERROR_INVALIDDATA;
1258  if (asf_pkt->size_left > size)
1259  asf_pkt->size_left -= size;
1260  else
1261  asf_pkt->size_left = 0;
1262  if ((ret = avio_read(pb, p, size)) < 0)
1263  return ret;
1264  if (s->key && s->keylen == 20)
1265  ff_asfcrypt_dec(s->key, p, ret);
1266  if (asf->packet_size_internal)
1267  avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1268  avio_skip(pb, asf->pad_len); // skip padding
1269 
1270  return 0;
1271 }
1272 
1274 {
1275  ASFContext *asf = s->priv_data;
1276  AVIOContext *pb = s->pb;
1277  int ret, i;
1278  ASFPacket *asf_pkt = NULL;
1279 
1280  if (!asf->sub_left) {
1281  uint32_t off_len, media_len;
1282  uint8_t stream_num;
1283 
1284  stream_num = avio_r8(pb);
1285  asf->stream_index = stream_num & ASF_STREAM_NUM;
1286  for (i = 0; i < asf->nb_streams; i++) {
1287  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1288  asf_pkt = &asf->asf_st[i]->pkt;
1289  asf_pkt->stream_index = asf->asf_st[i]->index;
1290  break;
1291  }
1292  }
1293  if (!asf_pkt) {
1294  if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1295  if (!asf->packet_size) {
1296  av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1297  return AVERROR_INVALIDDATA;
1298  }
1299  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1300  av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1301  asf->stream_index);
1302  return AVERROR(EAGAIN);
1303  } else
1304  return AVERROR_INVALIDDATA;
1305  }
1306 
1307  if (stream_num >> 7)
1308  asf_pkt->flags |= AV_PKT_FLAG_KEY;
1310  ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1312  ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1314  ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1315  if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1316  av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1317  reset_packet(asf_pkt);
1318  }
1319  asf_pkt->frame_num = media_len;
1320  asf->sub_dts = off_len;
1321  if (asf->nb_mult_left) {
1322  if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1323  return ret;
1324  } else if (asf->rep_data_len == 1) {
1325  asf->sub_left = 1;
1326  asf->state = READ_SINGLE;
1327  pkt->flags = asf_pkt->flags;
1328  if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1329  return ret;
1330  } else {
1331  if ((ret = asf_read_single_payload(s, pkt, asf_pkt)) < 0)
1332  return ret;
1333  }
1334  } else {
1335  for (i = 0; i <= asf->nb_streams; i++) {
1336  if (asf->stream_index == asf->asf_st[i]->stream_index) {
1337  asf_pkt = &asf->asf_st[i]->pkt;
1338  break;
1339  }
1340  }
1341  if (!asf_pkt)
1342  return AVERROR_INVALIDDATA;
1343  pkt->flags = asf_pkt->flags;
1344  pkt->dts = asf_pkt->dts;
1345  pkt->stream_index = asf->asf_st[i]->index;
1346  if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1347  return ret;
1348  }
1349 
1350  return 0;
1351 }
1352 
1354 {
1355  ASFContext *asf = s->priv_data;
1356  AVIOContext *pb = s->pb;
1357  uint64_t size;
1358  uint32_t av_unused seq;
1359  unsigned char error_flags, len_flags, pay_flags;
1360 
1361  asf->packet_offset = avio_tell(pb);
1362  error_flags = avio_r8(pb); // read Error Correction Flags
1363  if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1364  if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1365  size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1366  avio_skip(pb, size);
1367  }
1368  len_flags = avio_r8(pb);
1369  } else
1370  len_flags = error_flags;
1371  asf->prop_flags = avio_r8(pb);
1373  ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1375  ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1377  ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1378  asf->send_time = avio_rl32(pb); // send time
1379  avio_skip(pb, 2); // skip duration
1380  if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1381  pay_flags = avio_r8(pb);
1382  asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1383  }
1384 
1385  return 0;
1386 }
1387 
1388 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1389 {
1390  ASFContext *asf = s->priv_data;
1391  ASFStream *asf_st = asf->asf_st[st_num];
1392  unsigned char *p = asf_pkt->avpkt.data;
1393  uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1394  uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1395  int nchunks = pkt_len / chunk_len;
1396  AVPacket pkt;
1397  int pos = 0, j, l, ret;
1398 
1399 
1400  if ((ret = av_new_packet(&pkt, asf_pkt->data_size)) < 0)
1401  return ret;
1402 
1403  while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1404  if (pos >= asf_pkt->data_size) {
1405  break;
1406  }
1407  for (l = 0; l < pkt_len; l++) {
1408  if (pos >= asf_pkt->data_size) {
1409  break;
1410  }
1411  for (j = 0; j < asf_st->span; j++) {
1412  if ((pos + chunk_len) >= asf_pkt->data_size)
1413  break;
1414  memcpy(pkt.data + pos,
1415  p + (j * nchunks + l) * chunk_len,
1416  chunk_len);
1417  pos += chunk_len;
1418  }
1419  }
1420  p += asf_st->span * pkt_len;
1421  if (p > asf_pkt->avpkt.data + asf_pkt->data_size)
1422  break;
1423  }
1424  av_free_packet(&asf_pkt->avpkt);
1425  asf_pkt->avpkt = pkt;
1426 
1427  return 0;
1428 }
1429 
1431 {
1432  ASFContext *asf = s->priv_data;
1433  AVIOContext *pb = s->pb;
1434  int ret, i;
1435 
1436  if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1437  !(asf->b_flags & ASF_FLAG_BROADCAST))
1438  return AVERROR_EOF;
1439  while (!pb->eof_reached) {
1440  if (asf->state == PARSE_PACKET_HEADER) {
1442  if (pb->eof_reached)
1443  break;
1444  if (!asf->nb_mult_left)
1445  asf->state = READ_SINGLE;
1446  else
1447  asf->state = READ_MULTI;
1448  }
1449  ret = asf_read_payload(s, pkt);
1450  if (ret == AVERROR(EAGAIN)) {
1451  asf->state = PARSE_PACKET_HEADER;
1452  continue;
1453  }
1454  else if (ret < 0)
1455  return ret;
1456 
1457  switch (asf->state) {
1458  case READ_SINGLE:
1459  if (!asf->sub_left)
1460  asf->state = PARSE_PACKET_HEADER;
1461  break;
1462  case READ_MULTI_SUB:
1463  if (!asf->sub_left && !asf->nb_mult_left) {
1464  asf->state = PARSE_PACKET_HEADER;
1465  if (!asf->return_subpayload)
1466  avio_skip(pb, asf->pad_len); // skip padding
1467  if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1468  avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1469  } else if (!asf->sub_left)
1470  asf->state = READ_MULTI;
1471  break;
1472  case READ_MULTI:
1473  if (!asf->nb_mult_left) {
1474  asf->state = PARSE_PACKET_HEADER;
1475  if (!asf->return_subpayload) {
1476  avio_skip(pb, asf->pad_len); // skip padding
1477  }
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 < s->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_free_packet(&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_free_packet(&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_free_packet(&pkt);
1623  }
1624  *pos = pkt_pos;
1625 
1626  av_free_packet(&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 
1667 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
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  while (avio_tell(pb) <= offset + size) {
1676  if (avio_tell(pb) == asf->offset)
1677  break;
1678  asf->offset = avio_tell(pb);
1679  if ((ret = ff_get_guid(pb, &guid)) < 0)
1680  return ret;
1681  g = find_guid(guid);
1682  if (g) {
1683  if ((ret = g->read_object(s, g)) < 0)
1684  return ret;
1685  } else {
1686  GUIDParseTable g2;
1687 
1688  g2.name = "Unknown";
1689  g2.is_subobject = 1;
1690  asf_read_unknown(s, &g2);
1691  }
1692  }
1693 
1694  return 0;
1695 }
1696 
1698 {
1699  ASFContext *asf = s->priv_data;
1700  AVIOContext *pb = s->pb;
1701  const GUIDParseTable *g = NULL;
1702  ff_asf_guid guid;
1703  int i, ret;
1704  uint64_t size;
1705 
1706  asf->preroll = 0;
1707  asf->is_simple_index = 0;
1708  ff_get_guid(pb, &guid);
1709  if (ff_guidcmp(&guid, &ff_asf_header))
1710  return AVERROR_INVALIDDATA;
1711  avio_skip(pb, 8); // skip header object size
1712  avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1713  asf->data_reached = 0;
1714 
1715  /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1716  * for the first time,
1717  * Index object is processed and got eof and then seeking back to the Data is performed.
1718  */
1719  while (1) {
1720  // for the cases when object size is invalid
1721  if (avio_tell(pb) == asf->offset)
1722  break;
1723  asf->offset = avio_tell(pb);
1724  if ((ret = ff_get_guid(pb, &guid)) < 0) {
1725  if (ret == AVERROR_EOF && asf->data_reached)
1726  break;
1727  else
1728  goto failed;
1729  }
1730  g = find_guid(guid);
1731  if (g) {
1732  asf->unknown_offset = asf->offset;
1733  asf->is_header = 1;
1734  if ((ret = g->read_object(s, g)) < 0)
1735  goto failed;
1736  } else {
1737  size = avio_rl64(pb);
1738  align_position(pb, asf->offset, size);
1739  }
1740  if (asf->data_reached && (!pb->seekable || (asf->b_flags & ASF_FLAG_BROADCAST)))
1741  break;
1742  }
1743 
1744  if (!asf->data_reached) {
1745  av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1746  ret = AVERROR_INVALIDDATA;
1747  goto failed;
1748  }
1749  if (pb->seekable)
1750  avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1751 
1752  for (i = 0; i < asf->nb_streams; i++) {
1753  const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1754  AVStream *st = s->streams[asf->asf_st[i]->index];
1755  set_language(s, rfc1766, &st->metadata);
1756  }
1757 
1758  for (i = 0; i < ASF_MAX_STREAMS; i++) {
1759  AVStream *st = NULL;
1760 
1761  st = find_stream(s, i);
1762  if (st) {
1764  if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1767  }
1768  }
1769  }
1770 
1771  return 0;
1772 
1773 failed:
1774  asf_read_close(s);
1775  return ret;
1776 }
1777 
1779  .name = "asf_o",
1780  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1781  .priv_data_size = sizeof(ASFContext),
1782  .read_probe = asf_probe,
1786  .read_timestamp = asf_read_timestamp,
1789 };
int nb_streams
Definition: asfdec_o.c:121
int data_reached
Definition: asfdec_o.c:96
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:840
#define NULL
Definition: coverity.c:32
#define AVFMT_NOBINSEARCH
Format does not allow to fall back on binary search via read_timestamp.
Definition: avformat.h:490
static int asf_read_close(AVFormatContext *s)
Definition: asfdec_o.c:1511
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define ASF_BYTE_ARRAY
Definition: asfdec_o.c:49
uint8_t stream_index
Definition: asfdec_o.c:78
static int asf_read_packet_header(AVFormatContext *s)
Definition: asfdec_o.c:1353
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:284
int64_t data_offset
Definition: asfdec_o.c:114
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:136
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:1749
enum AVCodecID id
Definition: mxfenc.c:102
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2783
int size_left
Definition: asfdec_o.c:73
#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:4098
const char * g
Definition: vf_curves.c:108
int64_t pos
Definition: avformat.h:796
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:71
static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:221
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:926
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:855
int size
Definition: avcodec.h:1434
uint32_t packet_size
Definition: asfdec_o.c:102
#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:204
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1057
uint16_t virtual_pkt_len
Definition: asfdec_o.c:83
#define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE
Definition: asf.h:152
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:279
const char * name
Definition: asfdec_o.c:60
static void get_id3_tag(AVFormatContext *s, int len)
Definition: asfdec_o.c:459
#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:413
static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:723
static AVPacket pkt
#define ASF_UNICODE
Definition: asfdec_o.c:47
static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1147
ASFStreamData asf_sd[ASF_MAX_STREAMS]
Definition: asfdec_o.c:120
static int asf_read_single_payload(AVFormatContext *s, AVPacket *pkt, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1220
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:1080
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:908
Macro definitions for various function/variable attributes.
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:3860
Format I/O context.
Definition: avformat.h:1285
static const GUIDParseTable * find_guid(ff_asf_guid guid)
Definition: asfdec_o.c:1651
char str[32]
Definition: internal.h:48
#define ASF_STREAM_NUM
Definition: asfdec_o.c:52
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:469
Public dictionary API.
static int64_t start_time
Definition: ffplay.c:325
static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:574
uint8_t
static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
Definition: asfdec_o.c:315
uint8_t stream_index
Definition: asfdec_o.c:74
static int nb_streams
Definition: ffprobe.c:226
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:195
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:554
int is_simple_index
Definition: asfdec_o.c:97
AVOptions.
uint8_t dts_delta
Definition: asfdec_o.c:128
#define BMP_HEADER_SIZE
Definition: asfdec_o.c:54
int id
Format-specific stream ID.
Definition: avformat.h:861
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1627
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3761
int64_t send_time
Definition: asfdec_o.c:103
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1353
static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:934
uint8_t * data
Definition: avcodec.h:1433
int64_t offset
Definition: asfdec_o.c:112
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:600
static void reset_packet_state(AVFormatContext *s)
Definition: asfdec_o.c:1528
uint32_t tag
Definition: movenc.c:1339
#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:244
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:390
void av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:213
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:542
uint32_t pad_len
Definition: asfdec_o.c:131
AVRational aspect_ratio
Definition: asfdec_o.c:92
static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:621
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1479
#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:385
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_o.c:85
#define AVINDEX_KEYFRAME
Definition: avformat.h:803
static int asf_probe(AVProbeData *pd)
Definition: asfdec_o.c:151
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:102
int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize)
Read BITMAPINFOHEADER structure and set AVStream codec width, height and bits_per_encoded_sample fiel...
Definition: riffdec.c:203
#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:1497
int indexed
Definition: asfdec_o.c:81
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:1850
#define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE
Definition: asf.h:147
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:663
int type
Definition: asfdec_o.c:80
#define AVERROR(e)
Definition: error.h:43
#define ASF_QWORD
Definition: asfdec_o.c:46
const char * av_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
Convert a language code to a target codespace.
Definition: avlanguage.c:736
uint64_t preroll
Definition: asfdec_o.c:100
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:178
void ff_asfcrypt_dec(const uint8_t key[20], uint8_t *data, int len)
Definition: asfcrypt.c:147
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:199
static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:501
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1064
int64_t sub_dts
Definition: asfdec_o.c:127
simple assert() macros that are a bit more flexible than ISO C assert().
int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: riffdec.c:32
ff_asf_guid guid
Definition: asfdec_o.c:61
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:937
#define fail()
Definition: checkasm.h:57
int index
Definition: asfdec_o.c:79
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
const char * ff_id3v2_picture_types[21]
Definition: id3v2.c:105
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1439
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:533
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:873
static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
Definition: asfdec_o.c:1388
#define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT
Definition: asf.h:126
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:462
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:129
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1341
static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt, ASFPacket *asf_pkt)
Definition: asfdec_o.c:1169
#define ASF_FLAG_BROADCAST
Definition: asfdec_o.c:48
static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec_o.c:1273
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:160
int bit_rate
the average bitrate
Definition: avcodec.h:1577
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:134
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:970
#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE
Definition: asfdec_o.c:57
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:78
uint32_t frame_num
Definition: asfdec_o.c:69
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
AVInputFormat ff_asf_o_demuxer
Definition: asfdec_o.c:1778
int width
picture width / height.
Definition: avcodec.h:1691
int64_t dts
Definition: asfdec_o.c:68
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
ASFStream * asf_st
currently decoded stream
Definition: asfdec_f.c:112
static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
Definition: asfdec_o.c:204
uint64_t data_size
Definition: asfdec_o.c:109
#define ASF_WORD
Definition: asfdec_o.c:43
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:56
int32_t
#define READ_LEN(flag, name, len)
Definition: asfdec_o.c:1068
const ff_asf_guid ff_asf_ext_stream_embed_stream_header
Definition: asf.c:100
static int asf_read_value(AVFormatContext *s, const uint8_t *name, uint16_t name_len, uint16_t val_len, int type, AVDictionary **met)
Definition: asfdec_o.c:274
static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
Definition: asfdec_o.c:827
int n
Definition: avisynth_c.h:547
AVDictionary * metadata
Definition: avformat.h:928
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:192
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:831
unsigned int nb_sub
Definition: asfdec_o.c:136
#define ASF_BOOL
Definition: asfdec_o.c:42
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:634
#define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT
Definition: asf.h:107
uint8_t ff_asf_guid[16]
Definition: riff.h:84
Stream structure.
Definition: avformat.h:854
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:55
uint32_t rep_data_len
Definition: asfdec_o.c:132
uint32_t prop_flags
Definition: asfdec_o.c:107
AVPacket avpkt
Definition: asfdec_o.c:67
enum AVMediaType codec_type
Definition: avcodec.h:1520
enum AVCodecID codec_id
Definition: avcodec.h:1529
uint32_t packet_size_internal
Definition: asfdec_o.c:129
AVIOContext * pb
I/O context.
Definition: avformat.h:1327
const ff_asf_guid ff_asf_video_stream
Definition: asf.c:53
static int asf_read_picture(AVFormatContext *s, int len)
Definition: asfdec_o.c:359
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1544
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:491
void * buf
Definition: avisynth_c.h:553
int64_t first_packet_offset
Definition: asfdec_o.c:115
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1628
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
int nb_index_entries
Definition: avformat.h:1059
static const GUIDParseTable gdef[]
Definition: asfdec_o.c:1018
AVDictionary * asf_met
Definition: asfdec_o.c:91
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec_o.c:1430
rational number numerator/denominator
Definition: rational.h:43
#define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE
Definition: asf.h:131
#define ASF_DWORD
Definition: asfdec_o.c:45
byte swapping routines
uint64_t sub_left
Definition: asfdec_o.c:135
uint64_t unknown_size
Definition: asfdec_o.c:110
AVMediaType
Definition: avutil.h:191
#define snprintf
Definition: snprintf.h:34
uint16_t mult_sub_len
Definition: asfdec_o.c:137
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int size, int big_endian)
Definition: riffdec.c:86
This structure contains the data a format has to probe a file.
Definition: avformat.h:460
uint32_t b_flags
Definition: asfdec_o.c:106
ASFPacket pkt
Definition: asfdec_o.c:86
static int64_t pts
Global timestamp for the audio frames.
int64_t unknown_offset
Definition: asfdec_o.c:116
static void reset_packet(ASFPacket *asf_pkt)
Definition: asfdec_o.c:1135
static int flags
Definition: cpu.c:47
int duration
Definition: asfdec_o.c:72
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:913
int is_header
Definition: asfdec_o.c:98
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:472
const uint8_t * key
Definition: avformat.h:1433
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:647
Main libavformat public API header.
#define ASF_MAX_STREAMS
Definition: asfdec_o.c:53
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:141
common internal and external API header
if(ret< 0)
Definition: vf_mcdeint.c:280
static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len, unsigned char *ch, uint16_t buflen)
Definition: asfdec_o.c:260
int is_subobject
Definition: asfdec_o.c:63
uint64_t nb_packets
how many packets are there in the file, invalid if broadcasting
Definition: asfdec_o.c:101
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:906
static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
Definition: asfdec_o.c:1080
enum ASFContext::@151 state
#define ASF_GUID
Definition: asfdec_o.c:44
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:917
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:49
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata and chapters.
Definition: id3v2.c:1058
int(* read_object)(AVFormatContext *, const struct GUIDParseTable *)
Definition: asfdec_o.c:62
int den
denominator
Definition: rational.h:45
#define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE
Definition: asf.h:157
static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
Definition: asfdec_o.c:650
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:636
int eof_reached
true if eof reached
Definition: avio.h:139
int len
void * priv_data
Format private data.
Definition: avformat.h:1313
static AVStream * find_stream(AVFormatContext *s, uint16_t st_num)
Definition: asfdec_o.c:538
static int asf_set_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len, int type, AVDictionary **met)
Definition: asfdec_o.c:338
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1432
int duration
Definition: asfdec_o.c:104
uint64_t nb_mult_left
Definition: asfdec_o.c:138
char langs[32]
Definition: asfdec_o.c:90
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:640
#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:72
static int parse_video_info(AVIOContext *pb, AVStream *st)
Definition: asfdec_o.c:693
#define FFSWAP(type, a, b)
Definition: common.h:95
int stream_index
Definition: avcodec.h:1435
int flags
Definition: asfdec_o.c:70
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:106
This structure stores compressed data.
Definition: avcodec.h:1410
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:671
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int8_t span
Definition: asfdec_o.c:82
uint16_t virtual_chunk_len
Definition: asfdec_o.c:84
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:946
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().
Definition: utils.c:1865
#define av_unused
Definition: attributes.h:118
const char * name
Definition: opengl_enc.c:103
static int asf_read_header(AVFormatContext *s)
Definition: asfdec_o.c:1697
static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
Definition: asfdec_o.c:1667