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asfdec_f.c
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1 /*
2  * ASF compatible demuxer
3  * Copyright (c) 2000, 2001 Fabrice Bellard
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 <inttypes.h>
23 
24 #include "libavutil/attributes.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/bswap.h"
28 #include "libavutil/common.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
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 typedef struct ASFPayload {
44  uint16_t size;
45 } ASFPayload;
46 
47 typedef struct ASFStream {
48  int num;
49  unsigned char seq;
50  /* use for reading */
54  int timestamp;
55  int64_t duration;
57  int pkt_clean;
58 
59  int ds_span; /* descrambling */
62 
63  int64_t packet_pos;
64 
66 
68  uint32_t palette[256];
69 
72 } ASFStream;
73 
74 typedef struct ASFContext {
75  const AVClass *class;
76  int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
77  ASFStream streams[128]; ///< it's max number and it's not that big
78  uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
80  char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
81  /* non streamed additonnal info */
82  /* packet filling */
84  /* only for reading */
85  uint64_t data_offset; ///< beginning of the first data packet
86  uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
87  uint64_t data_object_size; ///< size of the data object
89 
91 
101  unsigned int packet_frag_offset;
102  unsigned int packet_frag_size;
108  int64_t packet_pos;
109 
111 
112  ASFStream *asf_st; ///< currently decoded stream
113 
116 
118 } ASFContext;
119 
120 static const AVOption options[] = {
121  { "no_resync_search", "Don't try to resynchronize by looking for a certain optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
122  { "export_xmp", "Export full XMP metadata", offsetof(ASFContext, export_xmp), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
123  { NULL },
124 };
125 
126 static const AVClass asf_class = {
127  .class_name = "asf demuxer",
128  .item_name = av_default_item_name,
129  .option = options,
130  .version = LIBAVUTIL_VERSION_INT,
131 };
132 
133 #undef NDEBUG
134 #include <assert.h>
135 
136 #define ASF_MAX_STREAMS 127
137 #define FRAME_HEADER_SIZE 6
138 // Fix Me! FRAME_HEADER_SIZE may be different.
139 // (7 is known to be too large for GipsyGuitar.wmv)
140 
141 #ifdef DEBUG
142 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
143  0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
144 };
145 
146 #define PRINT_IF_GUID(g, cmp) \
147  if (!ff_guidcmp(g, &cmp)) \
148  av_log(NULL, AV_LOG_TRACE, "(GUID: %s) ", # cmp)
149 
150 static void print_guid(ff_asf_guid *g)
151 {
152  int i;
153  PRINT_IF_GUID(g, ff_asf_header);
154  else PRINT_IF_GUID(g, ff_asf_file_header);
155  else PRINT_IF_GUID(g, ff_asf_stream_header);
156  else PRINT_IF_GUID(g, ff_asf_audio_stream);
157  else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
158  else PRINT_IF_GUID(g, ff_asf_video_stream);
159  else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
160  else PRINT_IF_GUID(g, ff_asf_command_stream);
161  else PRINT_IF_GUID(g, ff_asf_comment_header);
162  else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
163  else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
164  else PRINT_IF_GUID(g, ff_asf_data_header);
165  else PRINT_IF_GUID(g, ff_asf_simple_index_header);
166  else PRINT_IF_GUID(g, ff_asf_head1_guid);
167  else PRINT_IF_GUID(g, ff_asf_head2_guid);
168  else PRINT_IF_GUID(g, ff_asf_my_guid);
169  else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
170  else PRINT_IF_GUID(g, ff_asf_extended_content_header);
171  else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
172  else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
173  else PRINT_IF_GUID(g, ff_asf_metadata_header);
174  else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
175  else PRINT_IF_GUID(g, ff_asf_marker_header);
176  else PRINT_IF_GUID(g, stream_bitrate_guid);
177  else PRINT_IF_GUID(g, ff_asf_language_guid);
178  else
179  av_log(NULL, AV_LOG_TRACE, "(GUID: unknown) ");
180  for (i = 0; i < 16; i++)
181  av_log(NULL, AV_LOG_TRACE, " 0x%02x,", (*g)[i]);
182  av_log(NULL, AV_LOG_TRACE, "}\n");
183 }
184 #undef PRINT_IF_GUID
185 #else
186 #define print_guid(g) while(0)
187 #endif
188 
189 static int asf_probe(AVProbeData *pd)
190 {
191  /* check file header */
192  if (!ff_guidcmp(pd->buf, &ff_asf_header))
193  return AVPROBE_SCORE_MAX;
194  else
195  return 0;
196 }
197 
198 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
199  * but 16 bit for "Metadata Object" and "Metadata Library Object" */
200 static int get_value(AVIOContext *pb, int type, int type2_size)
201 {
202  switch (type) {
203  case 2:
204  return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
205  case 3:
206  return avio_rl32(pb);
207  case 4:
208  return avio_rl64(pb);
209  case 5:
210  return avio_rl16(pb);
211  default:
212  return INT_MIN;
213  }
214 }
215 
216 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
217  * but in reality this is only loosely similar */
219 {
220  AVPacket pkt = { 0 };
221  const CodecMime *mime = ff_id3v2_mime_tags;
222  enum AVCodecID id = AV_CODEC_ID_NONE;
223  char mimetype[64];
224  uint8_t *desc = NULL;
225  AVStream *st = NULL;
226  int ret, type, picsize, desc_len;
227 
228  /* type + picsize + mime + desc */
229  if (len < 1 + 4 + 2 + 2) {
230  av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
231  return AVERROR_INVALIDDATA;
232  }
233 
234  /* picture type */
235  type = avio_r8(s->pb);
236  len--;
237  if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
238  av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
239  type = 0;
240  }
241 
242  /* picture data size */
243  picsize = avio_rl32(s->pb);
244  len -= 4;
245 
246  /* picture MIME type */
247  len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
248  while (mime->id != AV_CODEC_ID_NONE) {
249  if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
250  id = mime->id;
251  break;
252  }
253  mime++;
254  }
255  if (id == AV_CODEC_ID_NONE) {
256  av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
257  mimetype);
258  return 0;
259  }
260 
261  if (picsize >= len) {
262  av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
263  picsize, len);
264  return AVERROR_INVALIDDATA;
265  }
266 
267  /* picture description */
268  desc_len = (len - picsize) * 2 + 1;
269  desc = av_malloc(desc_len);
270  if (!desc)
271  return AVERROR(ENOMEM);
272  len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
273 
274  ret = av_get_packet(s->pb, &pkt, picsize);
275  if (ret < 0)
276  goto fail;
277 
278  st = avformat_new_stream(s, NULL);
279  if (!st) {
280  ret = AVERROR(ENOMEM);
281  goto fail;
282  }
285  st->codecpar->codec_id = id;
286  st->attached_pic = pkt;
287  st->attached_pic.stream_index = st->index;
289 
290  if (*desc)
291  av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
292  else
293  av_freep(&desc);
294 
295  av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
296 
297  return 0;
298 
299 fail:
300  av_freep(&desc);
301  av_packet_unref(&pkt);
302  return ret;
303 }
304 
305 static void get_id3_tag(AVFormatContext *s, int len)
306 {
307  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
308 
309  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
310  if (id3v2_extra_meta)
311  ff_id3v2_parse_apic(s, &id3v2_extra_meta);
312  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
313 }
314 
315 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
316 {
317  ASFContext *asf = s->priv_data;
318  char *value = NULL;
319  int64_t off = avio_tell(s->pb);
320 #define LEN 22
321 
322  if ((unsigned)len >= (UINT_MAX - LEN) / 2)
323  return;
324 
325  if (!asf->export_xmp && !strncmp(key, "xmp", 3))
326  goto finish;
327 
328  value = av_malloc(2 * len + LEN);
329  if (!value)
330  goto finish;
331 
332  switch (type) {
333  case ASF_UNICODE:
334  avio_get_str16le(s->pb, len, value, 2 * len + 1);
335  break;
336  case -1: // ASCI
337  avio_read(s->pb, value, len);
338  value[len]=0;
339  break;
340  case ASF_BYTE_ARRAY:
341  if (!strcmp(key, "WM/Picture")) { // handle cover art
342  asf_read_picture(s, len);
343  } else if (!strcmp(key, "ID3")) { // handle ID3 tag
344  get_id3_tag(s, len);
345  } else {
346  av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
347  }
348  goto finish;
349  case ASF_BOOL:
350  case ASF_DWORD:
351  case ASF_QWORD:
352  case ASF_WORD: {
353  uint64_t num = get_value(s->pb, type, type2_size);
354  snprintf(value, LEN, "%"PRIu64, num);
355  break;
356  }
357  case ASF_GUID:
358  av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
359  goto finish;
360  default:
361  av_log(s, AV_LOG_DEBUG,
362  "Unsupported value type %d in tag %s.\n", type, key);
363  goto finish;
364  }
365  if (*value)
366  av_dict_set(&s->metadata, key, value, 0);
367 
368 finish:
369  av_freep(&value);
370  avio_seek(s->pb, off + len, SEEK_SET);
371 }
372 
374 {
375  ASFContext *asf = s->priv_data;
376  AVIOContext *pb = s->pb;
377 
378  ff_get_guid(pb, &asf->hdr.guid);
379  asf->hdr.file_size = avio_rl64(pb);
380  asf->hdr.create_time = avio_rl64(pb);
381  avio_rl64(pb); /* number of packets */
382  asf->hdr.play_time = avio_rl64(pb);
383  asf->hdr.send_time = avio_rl64(pb);
384  asf->hdr.preroll = avio_rl32(pb);
385  asf->hdr.ignore = avio_rl32(pb);
386  asf->hdr.flags = avio_rl32(pb);
387  asf->hdr.min_pktsize = avio_rl32(pb);
388  asf->hdr.max_pktsize = avio_rl32(pb);
389  if (asf->hdr.min_pktsize >= (1U << 29))
390  return AVERROR_INVALIDDATA;
391  asf->hdr.max_bitrate = avio_rl32(pb);
392  s->packet_size = asf->hdr.max_pktsize;
393 
394  return 0;
395 }
396 
398 {
399  ASFContext *asf = s->priv_data;
400  AVIOContext *pb = s->pb;
401  AVStream *st;
402  ASFStream *asf_st;
403  ff_asf_guid g;
404  enum AVMediaType type;
405  int type_specific_size, sizeX;
406  unsigned int tag1;
407  int64_t pos1, pos2, start_time;
408  int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
409 
410  if (s->nb_streams == ASF_MAX_STREAMS) {
411  av_log(s, AV_LOG_ERROR, "too many streams\n");
412  return AVERROR(EINVAL);
413  }
414 
415  pos1 = avio_tell(pb);
416 
417  st = avformat_new_stream(s, NULL);
418  if (!st)
419  return AVERROR(ENOMEM);
420  avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
421  start_time = asf->hdr.preroll;
422 
423  if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
424  int64_t fsize = avio_size(pb);
425  if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 ||
426  20*FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size))
427  st->duration = asf->hdr.play_time /
428  (10000000 / 1000) - start_time;
429  }
430  ff_get_guid(pb, &g);
431 
432  test_for_ext_stream_audio = 0;
433  if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
434  type = AVMEDIA_TYPE_AUDIO;
435  } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
436  type = AVMEDIA_TYPE_VIDEO;
437  } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
438  type = AVMEDIA_TYPE_VIDEO;
440  } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
441  type = AVMEDIA_TYPE_DATA;
443  test_for_ext_stream_audio = 1;
444  type = AVMEDIA_TYPE_UNKNOWN;
445  } else {
446  return -1;
447  }
448  ff_get_guid(pb, &g);
449  avio_skip(pb, 8); /* total_size */
450  type_specific_size = avio_rl32(pb);
451  avio_rl32(pb);
452  st->id = avio_rl16(pb) & 0x7f; /* stream id */
453  // mapping of asf ID to AV stream ID;
454  asf->asfid2avid[st->id] = s->nb_streams - 1;
455  asf_st = &asf->streams[st->id];
456 
457  avio_rl32(pb);
458 
459  if (test_for_ext_stream_audio) {
460  ff_get_guid(pb, &g);
462  type = AVMEDIA_TYPE_AUDIO;
463  is_dvr_ms_audio = 1;
464  ff_get_guid(pb, &g);
465  avio_rl32(pb);
466  avio_rl32(pb);
467  avio_rl32(pb);
468  ff_get_guid(pb, &g);
469  avio_rl32(pb);
470  }
471  }
472 
473  st->codecpar->codec_type = type;
474  if (type == AVMEDIA_TYPE_AUDIO) {
475  int ret = ff_get_wav_header(s, pb, st->codecpar, type_specific_size, 0);
476  if (ret < 0)
477  return ret;
478  if (is_dvr_ms_audio) {
479  // codec_id and codec_tag are unreliable in dvr_ms
480  // files. Set them later by probing stream.
481  st->request_probe = 1;
482  st->codecpar->codec_tag = 0;
483  }
484  if (st->codecpar->codec_id == AV_CODEC_ID_AAC)
486  else
488  /* We have to init the frame size at some point .... */
489  pos2 = avio_tell(pb);
490  if (size >= (pos2 + 8 - pos1 + 24)) {
491  asf_st->ds_span = avio_r8(pb);
492  asf_st->ds_packet_size = avio_rl16(pb);
493  asf_st->ds_chunk_size = avio_rl16(pb);
494  avio_rl16(pb); // ds_data_size
495  avio_r8(pb); // ds_silence_data
496  }
497  if (asf_st->ds_span > 1) {
498  if (!asf_st->ds_chunk_size ||
499  (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
500  asf_st->ds_packet_size % asf_st->ds_chunk_size)
501  asf_st->ds_span = 0; // disable descrambling
502  }
503  } else if (type == AVMEDIA_TYPE_VIDEO &&
504  size - (avio_tell(pb) - pos1 + 24) >= 51) {
505  avio_rl32(pb);
506  avio_rl32(pb);
507  avio_r8(pb);
508  avio_rl16(pb); /* size */
509  sizeX = avio_rl32(pb); /* size */
510  st->codecpar->width = avio_rl32(pb);
511  st->codecpar->height = avio_rl32(pb);
512  /* not available for asf */
513  avio_rl16(pb); /* panes */
514  st->codecpar->bits_per_coded_sample = avio_rl16(pb); /* depth */
515  tag1 = avio_rl32(pb);
516  avio_skip(pb, 20);
517  if (sizeX > 40) {
518  st->codecpar->extradata_size = ffio_limit(pb, sizeX - 40);
521  if (!st->codecpar->extradata)
522  return AVERROR(ENOMEM);
524  }
525 
526  /* Extract palette from extradata if bpp <= 8 */
527  /* This code assumes that extradata contains only palette */
528  /* This is true for all paletted codecs implemented in libavcodec */
529  if (st->codecpar->extradata_size && (st->codecpar->bits_per_coded_sample <= 8)) {
530 #if HAVE_BIGENDIAN
531  int i;
532  for (i = 0; i < FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE) / 4; i++)
533  asf_st->palette[i] = av_bswap32(((uint32_t *)st->codecpar->extradata)[i]);
534 #else
535  memcpy(asf_st->palette, st->codecpar->extradata,
537 #endif
538  asf_st->palette_changed = 1;
539  }
540 
541  st->codecpar->codec_tag = tag1;
543  if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
545  /* issue658 contains wrong w/h and MS even puts a fake seq header
546  * with wrong w/h in extradata while a correct one is in the stream.
547  * maximum lameness */
548  st->codecpar->width =
549  st->codecpar->height = 0;
550  av_freep(&st->codecpar->extradata);
551  st->codecpar->extradata_size = 0;
552  }
553  if (st->codecpar->codec_id == AV_CODEC_ID_H264)
555  if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4)
557  }
558  pos2 = avio_tell(pb);
559  avio_skip(pb, size - (pos2 - pos1 + 24));
560 
561  return 0;
562 }
563 
565 {
566  ASFContext *asf = s->priv_data;
567  AVIOContext *pb = s->pb;
568  ff_asf_guid g;
569  int ext_len, payload_ext_ct, stream_ct, i;
570  uint32_t leak_rate, stream_num;
571  unsigned int stream_languageid_index;
572 
573  avio_rl64(pb); // starttime
574  avio_rl64(pb); // endtime
575  leak_rate = avio_rl32(pb); // leak-datarate
576  avio_rl32(pb); // bucket-datasize
577  avio_rl32(pb); // init-bucket-fullness
578  avio_rl32(pb); // alt-leak-datarate
579  avio_rl32(pb); // alt-bucket-datasize
580  avio_rl32(pb); // alt-init-bucket-fullness
581  avio_rl32(pb); // max-object-size
582  avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
583  stream_num = avio_rl16(pb); // stream-num
584 
585  stream_languageid_index = avio_rl16(pb); // stream-language-id-index
586  if (stream_num < 128)
587  asf->streams[stream_num].stream_language_index = stream_languageid_index;
588 
589  avio_rl64(pb); // avg frametime in 100ns units
590  stream_ct = avio_rl16(pb); // stream-name-count
591  payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
592 
593  if (stream_num < 128) {
594  asf->stream_bitrates[stream_num] = leak_rate;
595  asf->streams[stream_num].payload_ext_ct = 0;
596  }
597 
598  for (i = 0; i < stream_ct; i++) {
599  avio_rl16(pb);
600  ext_len = avio_rl16(pb);
601  avio_skip(pb, ext_len);
602  }
603 
604  for (i = 0; i < payload_ext_ct; i++) {
605  int size;
606  ff_get_guid(pb, &g);
607  size = avio_rl16(pb);
608  ext_len = avio_rl32(pb);
609  avio_skip(pb, ext_len);
610  if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
611  ASFPayload *p = &asf->streams[stream_num].payload[i];
612  p->type = g[0];
613  p->size = size;
614  av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
615  asf->streams[stream_num].payload_ext_ct ++;
616  }
617  }
618 
619  return 0;
620 }
621 
623 {
624  AVIOContext *pb = s->pb;
625  int len1, len2, len3, len4, len5;
626 
627  len1 = avio_rl16(pb);
628  len2 = avio_rl16(pb);
629  len3 = avio_rl16(pb);
630  len4 = avio_rl16(pb);
631  len5 = avio_rl16(pb);
632  get_tag(s, "title", 0, len1, 32);
633  get_tag(s, "author", 0, len2, 32);
634  get_tag(s, "copyright", 0, len3, 32);
635  get_tag(s, "comment", 0, len4, 32);
636  avio_skip(pb, len5);
637 
638  return 0;
639 }
640 
642 {
643  AVIOContext *pb = s->pb;
644  ASFContext *asf = s->priv_data;
645  int desc_count, i, ret;
646 
647  desc_count = avio_rl16(pb);
648  for (i = 0; i < desc_count; i++) {
649  int name_len, value_type, value_len;
650  char name[1024];
651 
652  name_len = avio_rl16(pb);
653  if (name_len % 2) // must be even, broken lavf versions wrote len-1
654  name_len += 1;
655  if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
656  avio_skip(pb, name_len - ret);
657  value_type = avio_rl16(pb);
658  value_len = avio_rl16(pb);
659  if (!value_type && value_len % 2)
660  value_len += 1;
661  /* My sample has that stream set to 0 maybe that mean the container.
662  * ASF stream count starts at 1. I am using 0 to the container value
663  * since it's unused. */
664  if (!strcmp(name, "AspectRatioX"))
665  asf->dar[0].num = get_value(s->pb, value_type, 32);
666  else if (!strcmp(name, "AspectRatioY"))
667  asf->dar[0].den = get_value(s->pb, value_type, 32);
668  else
669  get_tag(s, name, value_type, value_len, 32);
670  }
671 
672  return 0;
673 }
674 
676 {
677  AVIOContext *pb = s->pb;
678  ASFContext *asf = s->priv_data;
679  int j, ret;
680  int stream_count = avio_rl16(pb);
681  for (j = 0; j < stream_count; j++) {
682  char lang[6];
683  unsigned int lang_len = avio_r8(pb);
684  if ((ret = avio_get_str16le(pb, lang_len, lang,
685  sizeof(lang))) < lang_len)
686  avio_skip(pb, lang_len - ret);
687  if (j < 128)
688  av_strlcpy(asf->stream_languages[j], lang,
689  sizeof(*asf->stream_languages));
690  }
691 
692  return 0;
693 }
694 
696 {
697  AVIOContext *pb = s->pb;
698  ASFContext *asf = s->priv_data;
699  int n, stream_num, name_len_utf16, name_len_utf8, value_len;
700  int ret, i;
701  n = avio_rl16(pb);
702 
703  for (i = 0; i < n; i++) {
704  uint8_t *name;
705  int value_type;
706 
707  avio_rl16(pb); // lang_list_index
708  stream_num = avio_rl16(pb);
709  name_len_utf16 = avio_rl16(pb);
710  value_type = avio_rl16(pb); /* value_type */
711  value_len = avio_rl32(pb);
712 
713  name_len_utf8 = 2*name_len_utf16 + 1;
714  name = av_malloc(name_len_utf8);
715  if (!name)
716  return AVERROR(ENOMEM);
717 
718  if ((ret = avio_get_str16le(pb, name_len_utf16, name, name_len_utf8)) < name_len_utf16)
719  avio_skip(pb, name_len_utf16 - ret);
720  av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
721  i, stream_num, name_len_utf16, value_type, value_len, name);
722 
723  if (!strcmp(name, "AspectRatioX")){
724  int aspect_x = get_value(s->pb, value_type, 16);
725  if(stream_num < 128)
726  asf->dar[stream_num].num = aspect_x;
727  } else if(!strcmp(name, "AspectRatioY")){
728  int aspect_y = get_value(s->pb, value_type, 16);
729  if(stream_num < 128)
730  asf->dar[stream_num].den = aspect_y;
731  } else {
732  get_tag(s, name, value_type, value_len, 16);
733  }
734  av_freep(&name);
735  }
736 
737  return 0;
738 }
739 
740 static int asf_read_marker(AVFormatContext *s, int64_t size)
741 {
742  AVIOContext *pb = s->pb;
743  ASFContext *asf = s->priv_data;
744  int i, count, name_len, ret;
745  char name[1024];
746 
747  avio_rl64(pb); // reserved 16 bytes
748  avio_rl64(pb); // ...
749  count = avio_rl32(pb); // markers count
750  avio_rl16(pb); // reserved 2 bytes
751  name_len = avio_rl16(pb); // name length
752  for (i = 0; i < name_len; i++)
753  avio_r8(pb); // skip the name
754 
755  for (i = 0; i < count; i++) {
756  int64_t pres_time;
757  int name_len;
758 
759  avio_rl64(pb); // offset, 8 bytes
760  pres_time = avio_rl64(pb); // presentation time
761  pres_time -= asf->hdr.preroll * 10000;
762  avio_rl16(pb); // entry length
763  avio_rl32(pb); // send time
764  avio_rl32(pb); // flags
765  name_len = avio_rl32(pb); // name length
766  if ((ret = avio_get_str16le(pb, name_len * 2, name,
767  sizeof(name))) < name_len)
768  avio_skip(pb, name_len - ret);
769  avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
771  }
772 
773  return 0;
774 }
775 
777 {
778  ASFContext *asf = s->priv_data;
779  ff_asf_guid g;
780  AVIOContext *pb = s->pb;
781  int i;
782  int64_t gsize;
783 
784  ff_get_guid(pb, &g);
785  if (ff_guidcmp(&g, &ff_asf_header))
786  return AVERROR_INVALIDDATA;
787  avio_rl64(pb);
788  avio_rl32(pb);
789  avio_r8(pb);
790  avio_r8(pb);
791  memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
792 
793  for (i = 0; i<128; i++)
794  asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
795 
796  for (;;) {
797  uint64_t gpos = avio_tell(pb);
798  int ret = 0;
799  ff_get_guid(pb, &g);
800  gsize = avio_rl64(pb);
801  print_guid(&g);
802  if (!ff_guidcmp(&g, &ff_asf_data_header)) {
803  asf->data_object_offset = avio_tell(pb);
804  /* If not streaming, gsize is not unlimited (how?),
805  * and there is enough space in the file.. */
806  if (!(asf->hdr.flags & 0x01) && gsize >= 100)
807  asf->data_object_size = gsize - 24;
808  else
809  asf->data_object_size = (uint64_t)-1;
810  break;
811  }
812  if (gsize < 24)
813  return AVERROR_INVALIDDATA;
814  if (!ff_guidcmp(&g, &ff_asf_file_header)) {
815  ret = asf_read_file_properties(s, gsize);
816  } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
817  ret = asf_read_stream_properties(s, gsize);
818  } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
819  asf_read_content_desc(s, gsize);
820  } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
821  asf_read_language_list(s, gsize);
822  } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
823  asf_read_ext_content_desc(s, gsize);
824  } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
825  asf_read_metadata(s, gsize);
826  } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
827  asf_read_metadata(s, gsize);
828  } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
830 
831  // there could be an optional stream properties object to follow
832  // if so the next iteration will pick it up
833  continue;
834  } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
835  ff_get_guid(pb, &g);
836  avio_skip(pb, 6);
837  continue;
838  } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
839  asf_read_marker(s, gsize);
840  } else if (avio_feof(pb)) {
841  return AVERROR_EOF;
842  } else {
843  if (!s->keylen) {
845  unsigned int len;
846  AVPacket pkt;
848  "DRM protected stream detected, decoding will likely fail!\n");
849  len= avio_rl32(pb);
850  av_log(s, AV_LOG_DEBUG, "Secret data:\n");
851 
852  if ((ret = av_get_packet(pb, &pkt, len)) < 0)
853  return ret;
854  av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
855  av_packet_unref(&pkt);
856  len= avio_rl32(pb);
857  get_tag(s, "ASF_Protection_Type", -1, len, 32);
858  len= avio_rl32(pb);
859  get_tag(s, "ASF_Key_ID", -1, len, 32);
860  len= avio_rl32(pb);
861  get_tag(s, "ASF_License_URL", -1, len, 32);
862  } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
864  "Ext DRM protected stream detected, decoding will likely fail!\n");
865  av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
866  } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
867  av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
868  }
869  }
870  }
871  if (ret < 0)
872  return ret;
873 
874  if (avio_tell(pb) != gpos + gsize)
875  av_log(s, AV_LOG_DEBUG,
876  "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
877  avio_tell(pb) - gpos, gsize);
878  avio_seek(pb, gpos + gsize, SEEK_SET);
879  }
880  ff_get_guid(pb, &g);
881  avio_rl64(pb);
882  avio_r8(pb);
883  avio_r8(pb);
884  if (avio_feof(pb))
885  return AVERROR_EOF;
886  asf->data_offset = avio_tell(pb);
887  asf->packet_size_left = 0;
888 
889  for (i = 0; i < 128; i++) {
890  int stream_num = asf->asfid2avid[i];
891  if (stream_num >= 0) {
892  AVStream *st = s->streams[stream_num];
893  if (!st->codecpar->bit_rate)
894  st->codecpar->bit_rate = asf->stream_bitrates[i];
895  if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
898  asf->dar[i].num, asf->dar[i].den, INT_MAX);
899  } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
900  // Use ASF container value if the stream doesn't set AR.
904  asf->dar[0].num, asf->dar[0].den, INT_MAX);
905 
906  av_log(s, AV_LOG_TRACE, "i=%d, st->codecpar->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
907  i, st->codecpar->codec_type, asf->dar[i].num, asf->dar[i].den,
909 
910  // copy and convert language codes to the frontend
911  if (asf->streams[i].stream_language_index < 128) {
912  const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
913  if (rfc1766 && strlen(rfc1766) > 1) {
914  const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
915  const char *iso6392 = av_convert_lang_to(primary_tag,
917  if (iso6392)
918  av_dict_set(&st->metadata, "language", iso6392, 0);
919  }
920  }
921  }
922  }
923 
925 
926  return 0;
927 }
928 
929 #define DO_2BITS(bits, var, defval) \
930  switch (bits & 3) { \
931  case 3: \
932  var = avio_rl32(pb); \
933  rsize += 4; \
934  break; \
935  case 2: \
936  var = avio_rl16(pb); \
937  rsize += 2; \
938  break; \
939  case 1: \
940  var = avio_r8(pb); \
941  rsize++; \
942  break; \
943  default: \
944  var = defval; \
945  break; \
946  }
947 
948 /**
949  * Load a single ASF packet into the demuxer.
950  * @param s demux context
951  * @param pb context to read data from
952  * @return 0 on success, <0 on error
953  */
955 {
956  ASFContext *asf = s->priv_data;
957  uint32_t packet_length, padsize;
958  int rsize = 8;
959  int c, d, e, off;
960 
961  if (asf->uses_std_ecc > 0) {
962  // if we do not know packet size, allow skipping up to 32 kB
963  off = 32768;
964  if (asf->no_resync_search)
965  off = 3;
966 // else if (s->packet_size > 0 && !asf->uses_std_ecc)
967 // off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
968 
969  c = d = e = -1;
970  while (off-- > 0) {
971  c = d;
972  d = e;
973  e = avio_r8(pb);
974  if (c == 0x82 && !d && !e)
975  break;
976  }
977 
978  if (c != 0x82) {
979  /* This code allows handling of -EAGAIN at packet boundaries (i.e.
980  * if the packet sync code above triggers -EAGAIN). This does not
981  * imply complete -EAGAIN handling support at random positions in
982  * the stream. */
983  if (pb->error == AVERROR(EAGAIN))
984  return AVERROR(EAGAIN);
985  if (!avio_feof(pb))
986  av_log(s, AV_LOG_ERROR,
987  "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
988  }
989  if ((c & 0x8f) == 0x82) {
990  if (d || e) {
991  if (!avio_feof(pb))
992  av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
993  return AVERROR_INVALIDDATA;
994  }
995  c = avio_r8(pb);
996  d = avio_r8(pb);
997  rsize += 3;
998  } else if(!avio_feof(pb)) {
999  avio_seek(pb, -1, SEEK_CUR); // FIXME
1000  }
1001  } else {
1002  c = avio_r8(pb);
1003  if (c & 0x80) {
1004  rsize ++;
1005  if (!(c & 0x60)) {
1006  d = avio_r8(pb);
1007  e = avio_r8(pb);
1008  avio_seek(pb, (c & 0xF) - 2, SEEK_CUR);
1009  rsize += c & 0xF;
1010  }
1011 
1012  if (c != 0x82)
1013  avpriv_request_sample(s, "Invalid ECC byte\n");
1014 
1015  if (!asf->uses_std_ecc)
1016  asf->uses_std_ecc = (c == 0x82 && !d && !e) ? 1 : -1;
1017 
1018  c = avio_r8(pb);
1019  } else
1020  asf->uses_std_ecc = -1;
1021  d = avio_r8(pb);
1022  }
1023 
1024  asf->packet_flags = c;
1025  asf->packet_property = d;
1026 
1027  DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
1028  DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1029  DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1030 
1031  // the following checks prevent overflows and infinite loops
1032  if (!packet_length || packet_length >= (1U << 29)) {
1033  av_log(s, AV_LOG_ERROR,
1034  "invalid packet_length %"PRIu32" at:%"PRId64"\n",
1035  packet_length, avio_tell(pb));
1036  return AVERROR_INVALIDDATA;
1037  }
1038  if (padsize >= packet_length) {
1039  av_log(s, AV_LOG_ERROR,
1040  "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
1041  return AVERROR_INVALIDDATA;
1042  }
1043 
1044  asf->packet_timestamp = avio_rl32(pb);
1045  avio_rl16(pb); /* duration */
1046  // rsize has at least 11 bytes which have to be present
1047 
1048  if (asf->packet_flags & 0x01) {
1049  asf->packet_segsizetype = avio_r8(pb);
1050  rsize++;
1051  asf->packet_segments = asf->packet_segsizetype & 0x3f;
1052  } else {
1053  asf->packet_segments = 1;
1054  asf->packet_segsizetype = 0x80;
1055  }
1056  if (rsize > packet_length - padsize) {
1057  asf->packet_size_left = 0;
1058  av_log(s, AV_LOG_ERROR,
1059  "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
1060  rsize, packet_length, padsize, avio_tell(pb));
1061  return AVERROR_INVALIDDATA;
1062  }
1063  asf->packet_size_left = packet_length - padsize - rsize;
1064  if (packet_length < asf->hdr.min_pktsize)
1065  padsize += asf->hdr.min_pktsize - packet_length;
1066  asf->packet_padsize = padsize;
1067  av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
1069  return 0;
1070 }
1071 
1072 /**
1073  *
1074  * @return <0 if error
1075  */
1077 {
1078  ASFContext *asf = s->priv_data;
1079  ASFStream *asfst;
1080  int rsize = 1;
1081  int num = avio_r8(pb);
1082  int i;
1083  int64_t ts0, ts1 av_unused;
1084 
1085  asf->packet_segments--;
1086  asf->packet_key_frame = num >> 7;
1087  asf->stream_index = asf->asfid2avid[num & 0x7f];
1088  asfst = &asf->streams[num & 0x7f];
1089  // sequence should be ignored!
1090  DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1091  DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1093  av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d num:%X packet_property %X\n",
1094  asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1095  asf->packet_frag_offset, asf->packet_replic_size, num, asf->packet_property);
1096  if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1097  av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1098  return AVERROR_INVALIDDATA;
1099  }
1100  if (asf->packet_replic_size >= 8) {
1101  int64_t end = avio_tell(pb) + asf->packet_replic_size;
1102  AVRational aspect;
1103  asfst->packet_obj_size = avio_rl32(pb);
1104  if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1105  av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1106  asfst->packet_obj_size = 0;
1107  return AVERROR_INVALIDDATA;
1108  }
1109  asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1110 
1111  for (i = 0; i < asfst->payload_ext_ct; i++) {
1112  ASFPayload *p = &asfst->payload[i];
1113  int size = p->size;
1114  int64_t payend;
1115  if (size == 0xFFFF)
1116  size = avio_rl16(pb);
1117  payend = avio_tell(pb) + size;
1118  if (payend > end) {
1119  av_log(s, AV_LOG_ERROR, "too long payload\n");
1120  break;
1121  }
1122  switch (p->type) {
1123  case 0x50:
1124 // duration = avio_rl16(pb);
1125  break;
1126  case 0x54:
1127  aspect.num = avio_r8(pb);
1128  aspect.den = avio_r8(pb);
1129  if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1130  s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1131  }
1132  break;
1133  case 0x2A:
1134  avio_skip(pb, 8);
1135  ts0 = avio_rl64(pb);
1136  ts1 = avio_rl64(pb);
1137  if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1139  asf->ts_is_pts = 1;
1140  break;
1141  case 0x5B:
1142  case 0xB7:
1143  case 0xCC:
1144  case 0xC0:
1145  case 0xA0:
1146  //unknown
1147  break;
1148  }
1149  avio_seek(pb, payend, SEEK_SET);
1150  }
1151 
1152  avio_seek(pb, end, SEEK_SET);
1153  rsize += asf->packet_replic_size; // FIXME - check validity
1154  } else if (asf->packet_replic_size == 1) {
1155  // multipacket - frag_offset is beginning timestamp
1157  asf->packet_frag_offset = 0;
1159 
1160  asf->packet_time_delta = avio_r8(pb);
1161  rsize++;
1162  } else if (asf->packet_replic_size != 0) {
1163  av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1164  asf->packet_replic_size);
1165  return AVERROR_INVALIDDATA;
1166  }
1167  if (asf->packet_flags & 0x01) {
1168  DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1169  if (rsize > asf->packet_size_left) {
1170  av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1171  return AVERROR_INVALIDDATA;
1172  } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1173  if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1174  av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d>%d-%d+%d)\n",
1175  asf->packet_frag_size, asf->packet_size_left, rsize, asf->packet_padsize);
1176  return AVERROR_INVALIDDATA;
1177  } else {
1178  int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1179  asf->packet_size_left += diff;
1180  asf->packet_padsize -= diff;
1181  }
1182  }
1183  } else {
1184  asf->packet_frag_size = asf->packet_size_left - rsize;
1185  }
1186  if (asf->packet_replic_size == 1) {
1187  asf->packet_multi_size = asf->packet_frag_size;
1188  if (asf->packet_multi_size > asf->packet_size_left)
1189  return AVERROR_INVALIDDATA;
1190  }
1191  asf->packet_size_left -= rsize;
1192 
1193  return 0;
1194 }
1195 
1196 /**
1197  * Parse data from individual ASF packets (which were previously loaded
1198  * with asf_get_packet()).
1199  * @param s demux context
1200  * @param pb context to read data from
1201  * @param pkt pointer to store packet data into
1202  * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1203  * packets need to be loaded (through asf_get_packet())
1204  */
1206 {
1207  ASFContext *asf = s->priv_data;
1208  ASFStream *asf_st = 0;
1209  for (;;) {
1210  int ret;
1211  if (avio_feof(pb))
1212  return AVERROR_EOF;
1213  if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1214  asf->packet_segments < 1 && asf->packet_time_start == 0) {
1215  int ret = asf->packet_size_left + asf->packet_padsize;
1216 
1218  av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1219 
1220  assert(ret >= 0);
1221  /* fail safe */
1222  avio_skip(pb, ret);
1223 
1224  asf->packet_pos = avio_tell(pb);
1225  if (asf->data_object_size != (uint64_t)-1 &&
1226  (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1227  return AVERROR_EOF; /* Do not exceed the size of the data object */
1228  return 1;
1229  }
1230  if (asf->packet_time_start == 0) {
1231  if (asf_read_frame_header(s, pb) < 0) {
1232  asf->packet_time_start = asf->packet_segments = 0;
1233  continue;
1234  }
1235  if (asf->stream_index < 0 ||
1236  s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1237  (!asf->packet_key_frame &&
1238  (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1239  asf->packet_time_start = 0;
1240  /* unhandled packet (should not happen) */
1241  avio_skip(pb, asf->packet_frag_size);
1242  asf->packet_size_left -= asf->packet_frag_size;
1243  if (asf->stream_index < 0)
1244  av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1245  asf->packet_frag_size);
1246  continue;
1247  }
1248  asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1249  if (!asf->packet_frag_offset)
1250  asf->asf_st->skip_to_key = 0;
1251  }
1252  asf_st = asf->asf_st;
1253  av_assert0(asf_st);
1254 
1255  if (!asf_st->frag_offset && asf->packet_frag_offset) {
1256  av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1257  "stream:%d, expected:%d but got %d from pkt)\n",
1258  asf->stream_index, asf_st->frag_offset,
1259  asf->packet_frag_offset);
1260  avio_skip(pb, asf->packet_frag_size);
1261  asf->packet_size_left -= asf->packet_frag_size;
1262  continue;
1263  }
1264 
1265  if (asf->packet_replic_size == 1) {
1266  // frag_offset is here used as the beginning timestamp
1268  asf->packet_time_start += asf->packet_time_delta;
1269  asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1270  asf->packet_size_left--;
1271  asf->packet_multi_size--;
1272  if (asf->packet_multi_size < asf_st->packet_obj_size) {
1273  asf->packet_time_start = 0;
1274  avio_skip(pb, asf->packet_multi_size);
1275  asf->packet_size_left -= asf->packet_multi_size;
1276  continue;
1277  }
1278  asf->packet_multi_size -= asf_st->packet_obj_size;
1279  }
1280 
1281  if (asf_st->pkt.size != asf_st->packet_obj_size ||
1282  // FIXME is this condition sufficient?
1283  asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1284  int ret;
1285 
1286  if (asf_st->pkt.data) {
1287  av_log(s, AV_LOG_INFO,
1288  "freeing incomplete packet size %d, new %d\n",
1289  asf_st->pkt.size, asf_st->packet_obj_size);
1290  asf_st->frag_offset = 0;
1291  av_packet_unref(&asf_st->pkt);
1292  }
1293  /* new packet */
1294  if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1295  return ret;
1296  asf_st->seq = asf->packet_seq;
1297  if (asf->ts_is_pts) {
1298  asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1299  } else
1300  asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1301  asf_st->pkt.stream_index = asf->stream_index;
1302  asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1303  asf_st->pkt_clean = 0;
1304 
1305  if (asf_st->pkt.data && asf_st->palette_changed) {
1306  uint8_t *pal;
1308  AVPALETTE_SIZE);
1309  if (!pal) {
1310  av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1311  } else {
1312  memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1313  asf_st->palette_changed = 0;
1314  }
1315  }
1316  av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1317  asf->stream_index, asf->packet_key_frame,
1318  asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1320  asf_st->packet_obj_size);
1322  asf->packet_key_frame = 1;
1323  if (asf->packet_key_frame)
1324  asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1325  }
1326 
1327  /* read data */
1328  av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1329  s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1330  asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1331  asf->packet_size_left -= asf->packet_frag_size;
1332  if (asf->packet_size_left < 0)
1333  continue;
1334 
1335  if (asf->packet_frag_offset >= asf_st->pkt.size ||
1336  asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1337  av_log(s, AV_LOG_ERROR,
1338  "packet fragment position invalid %u,%u not in %u\n",
1340  asf_st->pkt.size);
1341  continue;
1342  }
1343 
1344  if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1345  memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1346  asf_st->pkt_clean = 1;
1347  }
1348 
1349  ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1350  asf->packet_frag_size);
1351  if (ret != asf->packet_frag_size) {
1352  if (ret < 0 || asf->packet_frag_offset + ret == 0)
1353  return ret < 0 ? ret : AVERROR_EOF;
1354 
1355  if (asf_st->ds_span > 1) {
1356  // scrambling, we can either drop it completely or fill the remainder
1357  // TODO: should we fill the whole packet instead of just the current
1358  // fragment?
1359  memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1360  asf->packet_frag_size - ret);
1361  ret = asf->packet_frag_size;
1362  } else {
1363  // no scrambling, so we can return partial packets
1364  av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1365  }
1366  }
1367  if (s->key && s->keylen == 20)
1368  ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1369  ret);
1370  asf_st->frag_offset += ret;
1371  /* test if whole packet is read */
1372  if (asf_st->frag_offset == asf_st->pkt.size) {
1373  // workaround for macroshit radio DVR-MS files
1375  asf_st->pkt.size > 100) {
1376  int i;
1377  for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1378  ;
1379  if (i == asf_st->pkt.size) {
1380  av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1381  asf_st->frag_offset = 0;
1382  av_packet_unref(&asf_st->pkt);
1383  continue;
1384  }
1385  }
1386 
1387  /* return packet */
1388  if (asf_st->ds_span > 1) {
1389  if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1390  av_log(s, AV_LOG_ERROR,
1391  "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1392  asf_st->pkt.size, asf_st->ds_packet_size,
1393  asf_st->ds_span);
1394  } else {
1395  /* packet descrambling */
1396  AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1398  if (buf) {
1399  uint8_t *newdata = buf->data;
1400  int offset = 0;
1401  memset(newdata + asf_st->pkt.size, 0,
1403  while (offset < asf_st->pkt.size) {
1404  int off = offset / asf_st->ds_chunk_size;
1405  int row = off / asf_st->ds_span;
1406  int col = off % asf_st->ds_span;
1407  int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1408  assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1409  assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1410  memcpy(newdata + offset,
1411  asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1412  asf_st->ds_chunk_size);
1413  offset += asf_st->ds_chunk_size;
1414  }
1415  av_buffer_unref(&asf_st->pkt.buf);
1416  asf_st->pkt.buf = buf;
1417  asf_st->pkt.data = buf->data;
1418  }
1419  }
1420  }
1421  asf_st->frag_offset = 0;
1422  *pkt = asf_st->pkt;
1423  asf_st->pkt.buf = 0;
1424  asf_st->pkt.size = 0;
1425  asf_st->pkt.data = 0;
1426  asf_st->pkt.side_data_elems = 0;
1427  asf_st->pkt.side_data = NULL;
1428  break; // packet completed
1429  }
1430  }
1431  return 0;
1432 }
1433 
1435 {
1436  ASFContext *asf = s->priv_data;
1437 
1438  for (;;) {
1439  int ret;
1440 
1441  /* parse cached packets, if any */
1442  if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1443  return ret;
1444  if ((ret = asf_get_packet(s, s->pb)) < 0)
1445  assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1446  asf->packet_segments < 1);
1447  asf->packet_time_start = 0;
1448  }
1449 }
1450 
1451 // Added to support seeking after packets have been read
1452 // If information is not reset, read_packet fails due to
1453 // leftover information from previous reads
1455 {
1456  ASFContext *asf = s->priv_data;
1457  ASFStream *asf_st;
1458  int i;
1459 
1460  asf->packet_size_left = 0;
1461  asf->packet_flags = 0;
1462  asf->packet_property = 0;
1463  asf->packet_timestamp = 0;
1464  asf->packet_segsizetype = 0;
1465  asf->packet_segments = 0;
1466  asf->packet_seq = 0;
1467  asf->packet_replic_size = 0;
1468  asf->packet_key_frame = 0;
1469  asf->packet_padsize = 0;
1470  asf->packet_frag_offset = 0;
1471  asf->packet_frag_size = 0;
1472  asf->packet_frag_timestamp = 0;
1473  asf->packet_multi_size = 0;
1474  asf->packet_time_delta = 0;
1475  asf->packet_time_start = 0;
1476 
1477  for (i = 0; i < 128; i++) {
1478  asf_st = &asf->streams[i];
1479  av_packet_unref(&asf_st->pkt);
1480  asf_st->packet_obj_size = 0;
1481  asf_st->frag_offset = 0;
1482  asf_st->seq = 0;
1483  }
1484  asf->asf_st = NULL;
1485 }
1486 
1488 {
1489  ASFContext *asf = s->priv_data;
1490  int i;
1491 
1492  for (i = 0; i < 128; i++) {
1493  int j = asf->asfid2avid[i];
1494  ASFStream *asf_st = &asf->streams[i];
1495  if (j < 0 || s->streams[j]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1496  continue;
1497 
1498  asf_st->skip_to_key = 1;
1499  }
1500 }
1501 
1503 {
1504  asf_reset_header(s);
1505 
1506  return 0;
1507 }
1508 
1509 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1510  int64_t *ppos, int64_t pos_limit)
1511 {
1512  ASFContext *asf = s->priv_data;
1513  AVPacket pkt1, *pkt = &pkt1;
1514  ASFStream *asf_st;
1515  int64_t pts;
1516  int64_t pos = *ppos;
1517  int i;
1518  int64_t start_pos[ASF_MAX_STREAMS];
1519 
1520  for (i = 0; i < s->nb_streams; i++)
1521  start_pos[i] = pos;
1522 
1523  if (s->packet_size > 0)
1524  pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1525  s->packet_size * s->packet_size +
1526  s->internal->data_offset;
1527  *ppos = pos;
1528  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1529  return AV_NOPTS_VALUE;
1530 
1532  asf_reset_header(s);
1533  for (;;) {
1534  if (av_read_frame(s, pkt) < 0) {
1535  av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1536  return AV_NOPTS_VALUE;
1537  }
1538 
1539  pts = pkt->dts;
1540 
1541  if (pkt->flags & AV_PKT_FLAG_KEY) {
1542  i = pkt->stream_index;
1543 
1544  asf_st = &asf->streams[s->streams[i]->id];
1545 
1546 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1547  pos = asf_st->packet_pos;
1548  av_assert1(pkt->pos == asf_st->packet_pos);
1549 
1550  av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1551  pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1552  start_pos[i] = asf_st->packet_pos + 1;
1553 
1554  if (pkt->stream_index == stream_index) {
1555  av_packet_unref(pkt);
1556  break;
1557  }
1558  }
1559  av_packet_unref(pkt);
1560  }
1561 
1562  *ppos = pos;
1563  return pts;
1564 }
1565 
1566 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1567 {
1568  ff_asf_guid g;
1569  ASFContext *asf = s->priv_data;
1570  int64_t current_pos = avio_tell(s->pb);
1571  int64_t ret;
1572 
1573  if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1574  return ret;
1575  }
1576 
1577  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1578  goto end;
1579 
1580  /* the data object can be followed by other top-level objects,
1581  * skip them until the simple index object is reached */
1582  while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1583  int64_t gsize = avio_rl64(s->pb);
1584  if (gsize < 24 || avio_feof(s->pb)) {
1585  goto end;
1586  }
1587  avio_skip(s->pb, gsize - 24);
1588  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1589  goto end;
1590  }
1591 
1592  {
1593  int64_t itime, last_pos = -1;
1594  int pct, ict;
1595  int i;
1596  int64_t av_unused gsize = avio_rl64(s->pb);
1597  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1598  goto end;
1599  itime = avio_rl64(s->pb);
1600  pct = avio_rl32(s->pb);
1601  ict = avio_rl32(s->pb);
1602  av_log(s, AV_LOG_DEBUG,
1603  "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1604 
1605  for (i = 0; i < ict; i++) {
1606  int pktnum = avio_rl32(s->pb);
1607  int pktct = avio_rl16(s->pb);
1608  int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1609  int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1610 
1611  if (pos != last_pos) {
1612  av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1613  pktnum, pktct, index_pts);
1614  av_add_index_entry(s->streams[stream_index], pos, index_pts,
1615  s->packet_size, 0, AVINDEX_KEYFRAME);
1616  last_pos = pos;
1617  }
1618  }
1619  asf->index_read = ict > 1;
1620  }
1621 end:
1622 // if (avio_feof(s->pb)) {
1623 // ret = 0;
1624 // }
1625  avio_seek(s->pb, current_pos, SEEK_SET);
1626  return ret;
1627 }
1628 
1629 static int asf_read_seek(AVFormatContext *s, int stream_index,
1630  int64_t pts, int flags)
1631 {
1632  ASFContext *asf = s->priv_data;
1633  AVStream *st = s->streams[stream_index];
1634  int ret = 0;
1635 
1636  if (s->packet_size <= 0)
1637  return -1;
1638 
1639  /* Try using the protocol's read_seek if available */
1640  if (s->pb) {
1641  int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1642  if (ret >= 0)
1643  asf_reset_header(s);
1644  if (ret != AVERROR(ENOSYS))
1645  return ret;
1646  }
1647 
1648  /* explicitly handle the case of seeking to 0 */
1649  if (!pts) {
1650  asf_reset_header(s);
1651  avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1652  return 0;
1653  }
1654 
1655  if (!asf->index_read) {
1656  ret = asf_build_simple_index(s, stream_index);
1657  if (ret < 0)
1658  asf->index_read = -1;
1659  }
1660 
1661  if (asf->index_read > 0 && st->index_entries) {
1662  int index = av_index_search_timestamp(st, pts, flags);
1663  if (index >= 0) {
1664  /* find the position */
1665  uint64_t pos = st->index_entries[index].pos;
1666 
1667  /* do the seek */
1668  av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1669  if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1670  return -1;
1671  asf_reset_header(s);
1672  skip_to_key(s);
1673  return 0;
1674  }
1675  }
1676  /* no index or seeking by index failed */
1677  if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1678  return -1;
1679  asf_reset_header(s);
1680  skip_to_key(s);
1681  return 0;
1682 }
1683 
1685  .name = "asf",
1686  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1687  .priv_data_size = sizeof(ASFContext),
1688  .read_probe = asf_probe,
1693  .read_timestamp = asf_read_pts,
1695  .priv_class = &asf_class,
1696 };
uint32_t palette[256]
Definition: asfdec_f.c:68
const ff_asf_guid ff_asf_header
Definition: asf.c:23
unsigned int packet_size
Definition: avformat.h:1429
#define NULL
Definition: coverity.c:32
discard all frames except keyframes
Definition: avcodec.h:783
#define AVFMT_NOBINSEARCH
Format does not allow to fall back on binary search via read_timestamp.
Definition: avformat.h:490
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:641
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:309
#define DO_2BITS(bits, var, defval)
Definition: asfdec_f.c:929
int packet_timestamp
Definition: asfdec_f.c:94
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:124
const ff_asf_guid ff_asf_ext_stream_audio_stream
Definition: asf.c:104
const ff_asf_guid ff_asf_ext_content_encryption
Definition: asf.c:138
int packet_obj_size
Definition: asfdec_f.c:53
static void skip_to_key(AVFormatContext *s)
Definition: asfdec_f.c:1487
int packet_segments
Definition: asfdec_f.c:96
AVOption.
Definition: opt.h:245
static int asf_read_language_list(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:675
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:1900
const ff_asf_guid ff_asf_codec_comment_header
Definition: asf.c:73
enum AVCodecID id
Definition: mxfenc.c:104
const ff_asf_guid ff_asf_metadata_header
Definition: asf.c:108
int packet_key_frame
Definition: asfdec_f.c:99
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2946
int ts_is_pts
Definition: asfdec_f.c:104
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1600
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:101
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4427
const char * g
Definition: vf_curves.c:108
const char * desc
Definition: nvenc.c:89
int64_t pos
Definition: avformat.h:816
int num
Definition: asfdec_f.c:48
int64_t data_offset
offset of the first packet
Definition: internal.h:82
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
ASFMainHeader hdr
Definition: asfdec_f.c:90
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3922
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: avcodec.h:1581
static int asf_read_file_properties(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:373
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1085
int skip_to_key
Definition: asfdec_f.c:56
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1752
int64_t packet_frag_timestamp
Definition: asfdec_f.c:103
int palette_changed
Definition: asfdec_f.c:67
const ff_asf_guid ff_asf_command_stream
Definition: asf.c:65
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
const ff_asf_guid ff_asf_ext_stream_header
Definition: asf.c:35
static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:397
discard all
Definition: avcodec.h:784
static AVPacket pkt
int uses_std_ecc
Definition: asfdec_f.c:117
uint32_t min_pktsize
size of a data packet invalid if broadcasting
Definition: asf.h:55
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1078
int packet_time_start
Definition: asfdec_f.c:107
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.
Macro definitions for various function/variable attributes.
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4189
Format I/O context.
Definition: avformat.h:1325
char str[32]
Definition: internal.h:50
const ff_asf_guid ff_asf_data_header
Definition: asf.c:80
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
int64_t duration
Definition: asfdec_f.c:55
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1779
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Public dictionary API.
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:197
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static int64_t start_time
Definition: ffplay.c:330
uint8_t
uint32_t flags
0x01 - broadcast 0x02 - seekable rest is reserved should be 0
Definition: asf.h:52
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:195
int width
Video only.
Definition: avcodec.h:3988
const ff_asf_guid ff_asf_audio_stream
Definition: asf.c:39
AVOptions.
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: asfdec_f.c:1434
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int packet_time_delta
Definition: asfdec_f.c:106
enum AVStreamParseType need_parsing
Definition: avformat.h:1074
int id
Format-specific stream ID.
Definition: avformat.h:883
ASFStream streams[128]
it's max number and it's not that big
Definition: asfdec_f.c:77
int packet_padsize
Definition: asfdec_f.c:100
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4065
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
int packet_size_left
Definition: asfdec_f.c:83
static void finish(void)
Definition: movenc.c:338
uint8_t * data
Definition: avcodec.h:1580
uint64_t send_time
time to send file, in 100-nanosecond units invalid if broadcasting (could be ignored) ...
Definition: asf.h:47
#define AVERROR_EOF
End of file.
Definition: error.h:55
enum AVCodecID id
Definition: internal.h:51
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
AVPacket pkt
Definition: asfdec_f.c:51
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:260
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
static int asf_read_marker(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:740
int asfid2avid[128]
conversion table from asf ID 2 AVStream ID
Definition: asfdec_f.c:76
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:598
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:88
uint64_t file_size
in bytes invalid if broadcasting
Definition: asf.h:41
ff_asf_guid guid
generated by client computer
Definition: asf.h:40
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3951
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1612
static int asf_read_metadata(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:695
#define U(x)
Definition: vp56_arith.h:37
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define AVINDEX_KEYFRAME
Definition: avformat.h:823
const ff_asf_guid ff_asf_audio_conceal_none
Definition: asf.c:43
int packet_replic_size
Definition: asfdec_f.c:98
#define FRAME_HEADER_SIZE
Definition: asfdec_f.c:137
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:189
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1539
const ff_asf_guid ff_asf_head1_guid
Definition: asf.c:84
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:1999
static const AVOption options[]
Definition: asfdec_f.c:120
static int asf_build_simple_index(AVFormatContext *s, int stream_index)
Definition: asfdec_f.c:1566
const ff_asf_guid ff_asf_simple_index_header
Definition: asf.c:96
const ff_asf_guid ff_asf_head2_guid
Definition: asf.c:88
av_default_item_name
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:720
#define AVERROR(e)
Definition: error.h:43
const char * av_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
Convert a language code to a target codespace.
Definition: avlanguage.c:736
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static int asf_read_picture(AVFormatContext *s, int len)
Definition: asfdec_f.c:218
void ff_asfcrypt_dec(const uint8_t key[20], uint8_t *data, int len)
Definition: asfcrypt.c:147
int packet_seq
Definition: asfdec_f.c:97
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3918
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1563
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1062
const ff_asf_guid ff_asf_video_conceal_none
Definition: asf.c:61
int ds_chunk_size
Definition: asfdec_f.c:61
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
int pkt_clean
Definition: asfdec_f.c:57
static int asf_read_content_desc(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:622
int side_data_elems
Definition: avcodec.h:1592
static const AVClass asf_class
Definition: asfdec_f.c:126
int frag_offset
Definition: asfdec_f.c:52
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
GLsizei count
Definition: opengl_enc.c:109
#define FFMAX(a, b)
Definition: common.h:94
uint64_t data_object_size
size of the data object
Definition: asfdec_f.c:87
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:81
const char * ff_id3v2_picture_types[21]
Definition: id3v2.c:105
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1586
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3940
Definition: asf.h:32
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:589
uint32_t max_pktsize
shall be the same as for min_pktsize invalid if broadcasting
Definition: asf.h:57
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
static int asf_read_close(AVFormatContext *s)
Definition: asfdec_f.c:1502
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:129
common internal API header
uint16_t size
Definition: asfdec_f.c:44
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: asfdec_f.c:1509
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1381
int export_xmp
Definition: asfdec_f.c:115
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
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
#define FFMIN(a, b)
Definition: common.h:96
const ff_asf_guid ff_asf_digital_signature
Definition: asf.c:142
static void get_id3_tag(AVFormatContext *s, int len)
Definition: asfdec_f.c:305
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
char stream_languages[128][6]
max number of streams, language for each (RFC1766, e.g. en-US)
Definition: asfdec_f.c:80
#define print_guid(g)
Definition: asfdec_f.c:186
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
const ff_asf_guid ff_asf_extended_content_header
Definition: asf.c:92
ASFStream * asf_st
currently decoded stream
Definition: asfdec_f.c:112
unsigned int packet_frag_size
Definition: asfdec_f.c:102
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
int timestamp
Definition: asfdec_f.c:54
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
const ff_asf_guid ff_asf_ext_stream_embed_stream_header
Definition: asf.c:100
int packet_multi_size
Definition: asfdec_f.c:105
int n
Definition: avisynth_c.h:547
AVDictionary * metadata
Definition: avformat.h:945
const ff_asf_guid ff_asf_my_guid
Definition: asf.c:126
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:192
static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
Definition: asfdec_f.c:1076
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:194
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
Definition: asfdec_f.c:1629
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:851
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
uint8_t ff_asf_guid[16]
Definition: riff.h:89
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
uint32_t ignore
preroll is 64 bits - but let's just ignore it
Definition: asf.h:51
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
uint32_t stream_bitrates[128]
max number of streams, bitrate for each (for streaming)
Definition: asfdec_f.c:78
#define av_bswap32
Definition: bswap.h:33
int ds_span
Definition: asfdec_f.c:59
uint64_t create_time
time of creation, in 100-nanosecond units since 1.1.1601 invalid if broadcasting
Definition: asf.h:43
const ff_asf_guid ff_asf_file_header
Definition: asf.c:27
uint64_t play_time
play time, in 100-nanosecond units invalid if broadcasting
Definition: asf.h:45
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:66
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
const ff_asf_guid ff_asf_video_stream
Definition: asf.c:53
AVInputFormat ff_asf_demuxer
Definition: asfdec_f.c:1684
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:563
uint8_t * data
The data buffer.
Definition: buffer.h:89
uint16_t stream_language_index
Definition: asfdec_f.c:65
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:491
void * buf
Definition: avisynth_c.h:553
GLint GLenum type
Definition: opengl_enc.c:105
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
int index_read
Definition: asfdec_f.c:88
Describe the class of an AVClass context structure.
Definition: log.h:67
int index
Definition: gxfenc.c:89
rational number numerator/denominator
Definition: rational.h:43
int ds_packet_size
Definition: asfdec_f.c:60
#define LEN
const ff_asf_guid ff_asf_stream_header
Definition: asf.c:31
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:276
unsigned int packet_frag_offset
Definition: asfdec_f.c:101
byte swapping routines
AVMediaType
Definition: avutil.h:191
const AVMetadataConv ff_asf_metadata_conv[]
Definition: asf.c:159
#define snprintf
Definition: snprintf.h:34
uint64_t data_object_offset
data object offset (excl. GUID & size)
Definition: asfdec_f.c:86
int error
contains the error code or 0 if no error happened
Definition: avio.h:228
This structure contains the data a format has to probe a file.
Definition: avformat.h:459
static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
Definition: asfdec_f.c:315
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1631
full parsing and repack of the first frame only, only implemented for H.264 currently ...
Definition: avformat.h:809
int packet_property
Definition: asfdec_f.c:93
const ff_asf_guid ff_asf_comment_header
Definition: asf.c:69
ASFPayload payload[8]
Definition: asfdec_f.c:71
static int64_t pts
Global timestamp for the audio frames.
static int flags
Definition: cpu.c:47
uint8_t type
Definition: asfdec_f.c:43
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
uint32_t preroll
timestamp of the first packet, in milliseconds if nonzero - subtract from time
Definition: asf.h:49
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:471
const uint8_t * key
Definition: avformat.h:1475
int64_t packet_pos
Definition: asfdec_f.c:63
A reference to a data buffer.
Definition: buffer.h:81
const ff_asf_guid ff_asf_language_guid
Definition: asf.c:130
full parsing and repack
Definition: avformat.h:806
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:704
Main libavformat public API header.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1591
const ff_asf_guid ff_asf_jfif_media
Definition: asf.c:57
Definition: asf.h:36
common internal and external API header
if(ret< 0)
Definition: vf_mcdeint.c:282
Definition: asf.h:35
static double c[64]
int no_resync_search
Definition: asfdec_f.c:114
unsigned char seq
Definition: asfdec_f.c:49
static int asf_read_header(AVFormatContext *s)
Definition: asfdec_f.c:776
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
const ff_asf_guid ff_asf_codec_comment1_header
Definition: asf.c:76
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata and chapters.
Definition: id3v2.c:1056
int den
denominator
Definition: rational.h:45
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
int64_t packet_pos
Definition: asfdec_f.c:108
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:731
int payload_ext_ct
Definition: asfdec_f.c:70
int64_t avio_seek_time(AVIOContext *h, int stream_index, int64_t timestamp, int flags)
Seek to a given timestamp relative to some component stream.
Definition: aviobuf.c:1113
const ff_asf_guid ff_asf_content_encryption
Definition: asf.c:134
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int len
AVRational dar[128]
Definition: asfdec_f.c:79
void * priv_data
Format private data.
Definition: avformat.h:1353
int packet_flags
Definition: asfdec_f.c:92
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3964
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3936
int packet_segsizetype
Definition: asfdec_f.c:95
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1579
static int asf_probe(AVProbeData *pd)
Definition: asfdec_f.c:189
int stream_index
Definition: asfdec_f.c:110
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
AVCodecParameters * codecpar
Definition: avformat.h:1006
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3926
static int64_t fsize(FILE *f)
Definition: audiomatch.c:28
const ff_asf_guid ff_asf_marker_header
Definition: asf.c:116
Definition: asf.h:34
void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
Send a nice hexadecimal dump of a buffer to the log.
Definition: dump.c:78
static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
Parse data from individual ASF packets (which were previously loaded with asf_get_packet()).
Definition: asfdec_f.c:1205
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:313
int stream_index
Definition: avcodec.h:1582
Definition: asf.h:33
#define MKTAG(a, b, c, d)
Definition: common.h:342
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:936
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:113
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1120
This structure stores compressed data.
Definition: avcodec.h:1557
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:728
#define ASF_MAX_STREAMS
Definition: asfdec_f.c:136
uint32_t max_bitrate
bandwidth of stream in bps should be the sum of bitrates of the individual media streams ...
Definition: asf.h:59
static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
Load a single ASF packet into the demuxer.
Definition: asfdec_f.c:954
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
const ff_asf_guid ff_asf_metadata_library_header
Definition: asf.c:112
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1573
for(j=16;j >0;--j)
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:963
static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:564
static int get_value(AVIOContext *pb, int type, int type2_size)
Definition: asfdec_f.c:200
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().
Definition: utils.c:2014
#define av_unused
Definition: attributes.h:126
static void asf_reset_header(AVFormatContext *s)
Definition: asfdec_f.c:1454
const char * name
Definition: opengl_enc.c:103