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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  avio_skip(pb, name_len);
753 
754  for (i = 0; i < count; i++) {
755  int64_t pres_time;
756  int name_len;
757 
758  if (avio_feof(pb))
759  return AVERROR_INVALIDDATA;
760 
761  avio_rl64(pb); // offset, 8 bytes
762  pres_time = avio_rl64(pb); // presentation time
763  pres_time -= asf->hdr.preroll * 10000;
764  avio_rl16(pb); // entry length
765  avio_rl32(pb); // send time
766  avio_rl32(pb); // flags
767  name_len = avio_rl32(pb); // name length
768  if ((ret = avio_get_str16le(pb, name_len * 2, name,
769  sizeof(name))) < name_len)
770  avio_skip(pb, name_len - ret);
771  avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
773  }
774 
775  return 0;
776 }
777 
779 {
780  ASFContext *asf = s->priv_data;
781  ff_asf_guid g;
782  AVIOContext *pb = s->pb;
783  int i;
784  int64_t gsize;
785 
786  ff_get_guid(pb, &g);
787  if (ff_guidcmp(&g, &ff_asf_header))
788  return AVERROR_INVALIDDATA;
789  avio_rl64(pb);
790  avio_rl32(pb);
791  avio_r8(pb);
792  avio_r8(pb);
793  memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
794 
795  for (i = 0; i<128; i++)
796  asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
797 
798  for (;;) {
799  uint64_t gpos = avio_tell(pb);
800  int ret = 0;
801  ff_get_guid(pb, &g);
802  gsize = avio_rl64(pb);
803  print_guid(&g);
804  if (!ff_guidcmp(&g, &ff_asf_data_header)) {
805  asf->data_object_offset = avio_tell(pb);
806  /* If not streaming, gsize is not unlimited (how?),
807  * and there is enough space in the file.. */
808  if (!(asf->hdr.flags & 0x01) && gsize >= 100)
809  asf->data_object_size = gsize - 24;
810  else
811  asf->data_object_size = (uint64_t)-1;
812  break;
813  }
814  if (gsize < 24)
815  return AVERROR_INVALIDDATA;
816  if (!ff_guidcmp(&g, &ff_asf_file_header)) {
817  ret = asf_read_file_properties(s, gsize);
818  } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
819  ret = asf_read_stream_properties(s, gsize);
820  } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
821  asf_read_content_desc(s, gsize);
822  } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
823  asf_read_language_list(s, gsize);
824  } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
825  asf_read_ext_content_desc(s, gsize);
826  } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
827  asf_read_metadata(s, gsize);
828  } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
829  asf_read_metadata(s, gsize);
830  } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
832 
833  // there could be an optional stream properties object to follow
834  // if so the next iteration will pick it up
835  continue;
836  } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
837  ff_get_guid(pb, &g);
838  avio_skip(pb, 6);
839  continue;
840  } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
841  asf_read_marker(s, gsize);
842  } else if (avio_feof(pb)) {
843  return AVERROR_EOF;
844  } else {
845  if (!s->keylen) {
847  unsigned int len;
848  AVPacket pkt;
850  "DRM protected stream detected, decoding will likely fail!\n");
851  len= avio_rl32(pb);
852  av_log(s, AV_LOG_DEBUG, "Secret data:\n");
853 
854  if ((ret = av_get_packet(pb, &pkt, len)) < 0)
855  return ret;
856  av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
857  av_packet_unref(&pkt);
858  len= avio_rl32(pb);
859  get_tag(s, "ASF_Protection_Type", -1, len, 32);
860  len= avio_rl32(pb);
861  get_tag(s, "ASF_Key_ID", -1, len, 32);
862  len= avio_rl32(pb);
863  get_tag(s, "ASF_License_URL", -1, len, 32);
864  } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
866  "Ext DRM protected stream detected, decoding will likely fail!\n");
867  av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
868  } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
869  av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
870  }
871  }
872  }
873  if (ret < 0)
874  return ret;
875 
876  if (avio_tell(pb) != gpos + gsize)
877  av_log(s, AV_LOG_DEBUG,
878  "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
879  avio_tell(pb) - gpos, gsize);
880  avio_seek(pb, gpos + gsize, SEEK_SET);
881  }
882  ff_get_guid(pb, &g);
883  avio_rl64(pb);
884  avio_r8(pb);
885  avio_r8(pb);
886  if (avio_feof(pb))
887  return AVERROR_EOF;
888  asf->data_offset = avio_tell(pb);
889  asf->packet_size_left = 0;
890 
891  for (i = 0; i < 128; i++) {
892  int stream_num = asf->asfid2avid[i];
893  if (stream_num >= 0) {
894  AVStream *st = s->streams[stream_num];
895  if (!st->codecpar->bit_rate)
896  st->codecpar->bit_rate = asf->stream_bitrates[i];
897  if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
900  asf->dar[i].num, asf->dar[i].den, INT_MAX);
901  } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
902  // Use ASF container value if the stream doesn't set AR.
906  asf->dar[0].num, asf->dar[0].den, INT_MAX);
907 
908  av_log(s, AV_LOG_TRACE, "i=%d, st->codecpar->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
909  i, st->codecpar->codec_type, asf->dar[i].num, asf->dar[i].den,
911 
912  // copy and convert language codes to the frontend
913  if (asf->streams[i].stream_language_index < 128) {
914  const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
915  if (rfc1766 && strlen(rfc1766) > 1) {
916  const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
917  const char *iso6392 = ff_convert_lang_to(primary_tag,
919  if (iso6392)
920  av_dict_set(&st->metadata, "language", iso6392, 0);
921  }
922  }
923  }
924  }
925 
927 
928  return 0;
929 }
930 
931 #define DO_2BITS(bits, var, defval) \
932  switch (bits & 3) { \
933  case 3: \
934  var = avio_rl32(pb); \
935  rsize += 4; \
936  break; \
937  case 2: \
938  var = avio_rl16(pb); \
939  rsize += 2; \
940  break; \
941  case 1: \
942  var = avio_r8(pb); \
943  rsize++; \
944  break; \
945  default: \
946  var = defval; \
947  break; \
948  }
949 
950 /**
951  * Load a single ASF packet into the demuxer.
952  * @param s demux context
953  * @param pb context to read data from
954  * @return 0 on success, <0 on error
955  */
957 {
958  ASFContext *asf = s->priv_data;
959  uint32_t packet_length, padsize;
960  int rsize = 8;
961  int c, d, e, off;
962 
963  if (asf->uses_std_ecc > 0) {
964  // if we do not know packet size, allow skipping up to 32 kB
965  off = 32768;
966  if (asf->no_resync_search)
967  off = 3;
968 // else if (s->packet_size > 0 && !asf->uses_std_ecc)
969 // off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
970 
971  c = d = e = -1;
972  while (off-- > 0) {
973  c = d;
974  d = e;
975  e = avio_r8(pb);
976  if (c == 0x82 && !d && !e)
977  break;
978  }
979 
980  if (c != 0x82) {
981  /* This code allows handling of -EAGAIN at packet boundaries (i.e.
982  * if the packet sync code above triggers -EAGAIN). This does not
983  * imply complete -EAGAIN handling support at random positions in
984  * the stream. */
985  if (pb->error == AVERROR(EAGAIN))
986  return AVERROR(EAGAIN);
987  if (!avio_feof(pb))
988  av_log(s, AV_LOG_ERROR,
989  "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
990  }
991  if ((c & 0x8f) == 0x82) {
992  if (d || e) {
993  if (!avio_feof(pb))
994  av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
995  return AVERROR_INVALIDDATA;
996  }
997  c = avio_r8(pb);
998  d = avio_r8(pb);
999  rsize += 3;
1000  } else if(!avio_feof(pb)) {
1001  avio_seek(pb, -1, SEEK_CUR); // FIXME
1002  }
1003  } else {
1004  c = avio_r8(pb);
1005  if (c & 0x80) {
1006  rsize ++;
1007  if (!(c & 0x60)) {
1008  d = avio_r8(pb);
1009  e = avio_r8(pb);
1010  avio_seek(pb, (c & 0xF) - 2, SEEK_CUR);
1011  rsize += c & 0xF;
1012  }
1013 
1014  if (c != 0x82)
1015  avpriv_request_sample(s, "Invalid ECC byte");
1016 
1017  if (!asf->uses_std_ecc)
1018  asf->uses_std_ecc = (c == 0x82 && !d && !e) ? 1 : -1;
1019 
1020  c = avio_r8(pb);
1021  } else
1022  asf->uses_std_ecc = -1;
1023  d = avio_r8(pb);
1024  }
1025 
1026  asf->packet_flags = c;
1027  asf->packet_property = d;
1028 
1029  DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
1030  DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1031  DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1032 
1033  // the following checks prevent overflows and infinite loops
1034  if (!packet_length || packet_length >= (1U << 29)) {
1035  av_log(s, AV_LOG_ERROR,
1036  "invalid packet_length %"PRIu32" at:%"PRId64"\n",
1037  packet_length, avio_tell(pb));
1038  return AVERROR_INVALIDDATA;
1039  }
1040  if (padsize >= packet_length) {
1041  av_log(s, AV_LOG_ERROR,
1042  "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
1043  return AVERROR_INVALIDDATA;
1044  }
1045 
1046  asf->packet_timestamp = avio_rl32(pb);
1047  avio_rl16(pb); /* duration */
1048  // rsize has at least 11 bytes which have to be present
1049 
1050  if (asf->packet_flags & 0x01) {
1051  asf->packet_segsizetype = avio_r8(pb);
1052  rsize++;
1053  asf->packet_segments = asf->packet_segsizetype & 0x3f;
1054  } else {
1055  asf->packet_segments = 1;
1056  asf->packet_segsizetype = 0x80;
1057  }
1058  if (rsize > packet_length - padsize) {
1059  asf->packet_size_left = 0;
1060  av_log(s, AV_LOG_ERROR,
1061  "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
1062  rsize, packet_length, padsize, avio_tell(pb));
1063  return AVERROR_INVALIDDATA;
1064  }
1065  asf->packet_size_left = packet_length - padsize - rsize;
1066  if (packet_length < asf->hdr.min_pktsize)
1067  padsize += asf->hdr.min_pktsize - packet_length;
1068  asf->packet_padsize = padsize;
1069  av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
1071  return 0;
1072 }
1073 
1074 /**
1075  *
1076  * @return <0 if error
1077  */
1079 {
1080  ASFContext *asf = s->priv_data;
1081  ASFStream *asfst;
1082  int rsize = 1;
1083  int num = avio_r8(pb);
1084  int i;
1085  int64_t ts0, ts1 av_unused;
1086 
1087  asf->packet_segments--;
1088  asf->packet_key_frame = num >> 7;
1089  asf->stream_index = asf->asfid2avid[num & 0x7f];
1090  asfst = &asf->streams[num & 0x7f];
1091  // sequence should be ignored!
1092  DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1093  DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1095  av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d num:%X packet_property %X\n",
1096  asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1097  asf->packet_frag_offset, asf->packet_replic_size, num, asf->packet_property);
1098  if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1099  av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1100  return AVERROR_INVALIDDATA;
1101  }
1102  if (asf->packet_replic_size >= 8) {
1103  int64_t end = avio_tell(pb) + asf->packet_replic_size;
1104  AVRational aspect;
1105  asfst->packet_obj_size = avio_rl32(pb);
1106  if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1107  av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1108  asfst->packet_obj_size = 0;
1109  return AVERROR_INVALIDDATA;
1110  }
1111  asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1112 
1113  for (i = 0; i < asfst->payload_ext_ct; i++) {
1114  ASFPayload *p = &asfst->payload[i];
1115  int size = p->size;
1116  int64_t payend;
1117  if (size == 0xFFFF)
1118  size = avio_rl16(pb);
1119  payend = avio_tell(pb) + size;
1120  if (payend > end) {
1121  av_log(s, AV_LOG_ERROR, "too long payload\n");
1122  break;
1123  }
1124  switch (p->type) {
1125  case 0x50:
1126 // duration = avio_rl16(pb);
1127  break;
1128  case 0x54:
1129  aspect.num = avio_r8(pb);
1130  aspect.den = avio_r8(pb);
1131  if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1132  s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1133  }
1134  break;
1135  case 0x2A:
1136  avio_skip(pb, 8);
1137  ts0 = avio_rl64(pb);
1138  ts1 = avio_rl64(pb);
1139  if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1141  asf->ts_is_pts = 1;
1142  break;
1143  case 0x5B:
1144  case 0xB7:
1145  case 0xCC:
1146  case 0xC0:
1147  case 0xA0:
1148  //unknown
1149  break;
1150  }
1151  avio_seek(pb, payend, SEEK_SET);
1152  }
1153 
1154  avio_seek(pb, end, SEEK_SET);
1155  rsize += asf->packet_replic_size; // FIXME - check validity
1156  } else if (asf->packet_replic_size == 1) {
1157  // multipacket - frag_offset is beginning timestamp
1159  asf->packet_frag_offset = 0;
1161 
1162  asf->packet_time_delta = avio_r8(pb);
1163  rsize++;
1164  } else if (asf->packet_replic_size != 0) {
1165  av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1166  asf->packet_replic_size);
1167  return AVERROR_INVALIDDATA;
1168  }
1169  if (asf->packet_flags & 0x01) {
1170  DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1171  if (rsize > asf->packet_size_left) {
1172  av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1173  return AVERROR_INVALIDDATA;
1174  } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1175  if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1176  av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d>%d-%d+%d)\n",
1177  asf->packet_frag_size, asf->packet_size_left, rsize, asf->packet_padsize);
1178  return AVERROR_INVALIDDATA;
1179  } else {
1180  int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1181  asf->packet_size_left += diff;
1182  asf->packet_padsize -= diff;
1183  }
1184  }
1185  } else {
1186  asf->packet_frag_size = asf->packet_size_left - rsize;
1187  }
1188  if (asf->packet_replic_size == 1) {
1189  asf->packet_multi_size = asf->packet_frag_size;
1190  if (asf->packet_multi_size > asf->packet_size_left)
1191  return AVERROR_INVALIDDATA;
1192  }
1193  asf->packet_size_left -= rsize;
1194 
1195  return 0;
1196 }
1197 
1198 /**
1199  * Parse data from individual ASF packets (which were previously loaded
1200  * with asf_get_packet()).
1201  * @param s demux context
1202  * @param pb context to read data from
1203  * @param pkt pointer to store packet data into
1204  * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1205  * packets need to be loaded (through asf_get_packet())
1206  */
1208 {
1209  ASFContext *asf = s->priv_data;
1210  ASFStream *asf_st = 0;
1211  for (;;) {
1212  int ret;
1213  if (avio_feof(pb))
1214  return AVERROR_EOF;
1215  if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1216  asf->packet_segments < 1 && asf->packet_time_start == 0) {
1217  int ret = asf->packet_size_left + asf->packet_padsize;
1218 
1220  av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1221 
1222  assert(ret >= 0);
1223  /* fail safe */
1224  avio_skip(pb, ret);
1225 
1226  asf->packet_pos = avio_tell(pb);
1227  if (asf->data_object_size != (uint64_t)-1 &&
1228  (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1229  return AVERROR_EOF; /* Do not exceed the size of the data object */
1230  return 1;
1231  }
1232  if (asf->packet_time_start == 0) {
1233  if (asf_read_frame_header(s, pb) < 0) {
1234  asf->packet_time_start = asf->packet_segments = 0;
1235  continue;
1236  }
1237  if (asf->stream_index < 0 ||
1238  s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1239  (!asf->packet_key_frame &&
1240  (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1241  asf->packet_time_start = 0;
1242  /* unhandled packet (should not happen) */
1243  avio_skip(pb, asf->packet_frag_size);
1244  asf->packet_size_left -= asf->packet_frag_size;
1245  if (asf->stream_index < 0)
1246  av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1247  asf->packet_frag_size);
1248  continue;
1249  }
1250  asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1251  if (!asf->packet_frag_offset)
1252  asf->asf_st->skip_to_key = 0;
1253  }
1254  asf_st = asf->asf_st;
1255  av_assert0(asf_st);
1256 
1257  if (!asf_st->frag_offset && asf->packet_frag_offset) {
1258  av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1259  "stream:%d, expected:%d but got %d from pkt)\n",
1260  asf->stream_index, asf_st->frag_offset,
1261  asf->packet_frag_offset);
1262  avio_skip(pb, asf->packet_frag_size);
1263  asf->packet_size_left -= asf->packet_frag_size;
1264  continue;
1265  }
1266 
1267  if (asf->packet_replic_size == 1) {
1268  // frag_offset is here used as the beginning timestamp
1270  asf->packet_time_start += asf->packet_time_delta;
1271  asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1272  asf->packet_size_left--;
1273  asf->packet_multi_size--;
1274  if (asf->packet_multi_size < asf_st->packet_obj_size) {
1275  asf->packet_time_start = 0;
1276  avio_skip(pb, asf->packet_multi_size);
1277  asf->packet_size_left -= asf->packet_multi_size;
1278  continue;
1279  }
1280  asf->packet_multi_size -= asf_st->packet_obj_size;
1281  }
1282 
1283  if (asf_st->pkt.size != asf_st->packet_obj_size ||
1284  // FIXME is this condition sufficient?
1285  asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1286  int ret;
1287 
1288  if (asf_st->pkt.data) {
1289  av_log(s, AV_LOG_INFO,
1290  "freeing incomplete packet size %d, new %d\n",
1291  asf_st->pkt.size, asf_st->packet_obj_size);
1292  asf_st->frag_offset = 0;
1293  av_packet_unref(&asf_st->pkt);
1294  }
1295  /* new packet */
1296  if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1297  return ret;
1298  asf_st->seq = asf->packet_seq;
1299  if (asf->ts_is_pts) {
1300  asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1301  } else
1302  asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1303  asf_st->pkt.stream_index = asf->stream_index;
1304  asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1305  asf_st->pkt_clean = 0;
1306 
1307  if (asf_st->pkt.data && asf_st->palette_changed) {
1308  uint8_t *pal;
1310  AVPALETTE_SIZE);
1311  if (!pal) {
1312  av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1313  } else {
1314  memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1315  asf_st->palette_changed = 0;
1316  }
1317  }
1318  av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1319  asf->stream_index, asf->packet_key_frame,
1320  asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1322  asf_st->packet_obj_size);
1324  asf->packet_key_frame = 1;
1325  if (asf->packet_key_frame)
1326  asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1327  }
1328 
1329  /* read data */
1330  av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1331  s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1332  asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1333  asf->packet_size_left -= asf->packet_frag_size;
1334  if (asf->packet_size_left < 0)
1335  continue;
1336 
1337  if (asf->packet_frag_offset >= asf_st->pkt.size ||
1338  asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1339  av_log(s, AV_LOG_ERROR,
1340  "packet fragment position invalid %u,%u not in %u\n",
1342  asf_st->pkt.size);
1343  continue;
1344  }
1345 
1346  if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1347  memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1348  asf_st->pkt_clean = 1;
1349  }
1350 
1351  ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1352  asf->packet_frag_size);
1353  if (ret != asf->packet_frag_size) {
1354  if (ret < 0 || asf->packet_frag_offset + ret == 0)
1355  return ret < 0 ? ret : AVERROR_EOF;
1356 
1357  if (asf_st->ds_span > 1) {
1358  // scrambling, we can either drop it completely or fill the remainder
1359  // TODO: should we fill the whole packet instead of just the current
1360  // fragment?
1361  memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1362  asf->packet_frag_size - ret);
1363  ret = asf->packet_frag_size;
1364  } else {
1365  // no scrambling, so we can return partial packets
1366  av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1367  }
1368  }
1369  if (s->key && s->keylen == 20)
1370  ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1371  ret);
1372  asf_st->frag_offset += ret;
1373  /* test if whole packet is read */
1374  if (asf_st->frag_offset == asf_st->pkt.size) {
1375  // workaround for macroshit radio DVR-MS files
1377  asf_st->pkt.size > 100) {
1378  int i;
1379  for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1380  ;
1381  if (i == asf_st->pkt.size) {
1382  av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1383  asf_st->frag_offset = 0;
1384  av_packet_unref(&asf_st->pkt);
1385  continue;
1386  }
1387  }
1388 
1389  /* return packet */
1390  if (asf_st->ds_span > 1) {
1391  if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1392  av_log(s, AV_LOG_ERROR,
1393  "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1394  asf_st->pkt.size, asf_st->ds_packet_size,
1395  asf_st->ds_span);
1396  } else {
1397  /* packet descrambling */
1398  AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1400  if (buf) {
1401  uint8_t *newdata = buf->data;
1402  int offset = 0;
1403  memset(newdata + asf_st->pkt.size, 0,
1405  while (offset < asf_st->pkt.size) {
1406  int off = offset / asf_st->ds_chunk_size;
1407  int row = off / asf_st->ds_span;
1408  int col = off % asf_st->ds_span;
1409  int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1410  assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1411  assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1412  memcpy(newdata + offset,
1413  asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1414  asf_st->ds_chunk_size);
1415  offset += asf_st->ds_chunk_size;
1416  }
1417  av_buffer_unref(&asf_st->pkt.buf);
1418  asf_st->pkt.buf = buf;
1419  asf_st->pkt.data = buf->data;
1420  }
1421  }
1422  }
1423  asf_st->frag_offset = 0;
1424  *pkt = asf_st->pkt;
1425  asf_st->pkt.buf = 0;
1426  asf_st->pkt.size = 0;
1427  asf_st->pkt.data = 0;
1428  asf_st->pkt.side_data_elems = 0;
1429  asf_st->pkt.side_data = NULL;
1430  break; // packet completed
1431  }
1432  }
1433  return 0;
1434 }
1435 
1437 {
1438  ASFContext *asf = s->priv_data;
1439 
1440  for (;;) {
1441  int ret;
1442 
1443  /* parse cached packets, if any */
1444  if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1445  return ret;
1446  if ((ret = asf_get_packet(s, s->pb)) < 0)
1447  assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1448  asf->packet_segments < 1);
1449  asf->packet_time_start = 0;
1450  }
1451 }
1452 
1453 // Added to support seeking after packets have been read
1454 // If information is not reset, read_packet fails due to
1455 // leftover information from previous reads
1457 {
1458  ASFContext *asf = s->priv_data;
1459  ASFStream *asf_st;
1460  int i;
1461 
1462  asf->packet_size_left = 0;
1463  asf->packet_flags = 0;
1464  asf->packet_property = 0;
1465  asf->packet_timestamp = 0;
1466  asf->packet_segsizetype = 0;
1467  asf->packet_segments = 0;
1468  asf->packet_seq = 0;
1469  asf->packet_replic_size = 0;
1470  asf->packet_key_frame = 0;
1471  asf->packet_padsize = 0;
1472  asf->packet_frag_offset = 0;
1473  asf->packet_frag_size = 0;
1474  asf->packet_frag_timestamp = 0;
1475  asf->packet_multi_size = 0;
1476  asf->packet_time_delta = 0;
1477  asf->packet_time_start = 0;
1478 
1479  for (i = 0; i < 128; i++) {
1480  asf_st = &asf->streams[i];
1481  av_packet_unref(&asf_st->pkt);
1482  asf_st->packet_obj_size = 0;
1483  asf_st->frag_offset = 0;
1484  asf_st->seq = 0;
1485  }
1486  asf->asf_st = NULL;
1487 }
1488 
1490 {
1491  ASFContext *asf = s->priv_data;
1492  int i;
1493 
1494  for (i = 0; i < 128; i++) {
1495  int j = asf->asfid2avid[i];
1496  ASFStream *asf_st = &asf->streams[i];
1497  if (j < 0 || s->streams[j]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1498  continue;
1499 
1500  asf_st->skip_to_key = 1;
1501  }
1502 }
1503 
1505 {
1506  asf_reset_header(s);
1507 
1508  return 0;
1509 }
1510 
1511 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1512  int64_t *ppos, int64_t pos_limit)
1513 {
1514  ASFContext *asf = s->priv_data;
1515  AVPacket pkt1, *pkt = &pkt1;
1516  ASFStream *asf_st;
1517  int64_t pts;
1518  int64_t pos = *ppos;
1519  int i;
1520  int64_t start_pos[ASF_MAX_STREAMS];
1521 
1522  for (i = 0; i < s->nb_streams; i++)
1523  start_pos[i] = pos;
1524 
1525  if (s->packet_size > 0)
1526  pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1527  s->packet_size * s->packet_size +
1528  s->internal->data_offset;
1529  *ppos = pos;
1530  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1531  return AV_NOPTS_VALUE;
1532 
1534  asf_reset_header(s);
1535  for (;;) {
1536  if (av_read_frame(s, pkt) < 0) {
1537  av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1538  return AV_NOPTS_VALUE;
1539  }
1540 
1541  pts = pkt->dts;
1542 
1543  if (pkt->flags & AV_PKT_FLAG_KEY) {
1544  i = pkt->stream_index;
1545 
1546  asf_st = &asf->streams[s->streams[i]->id];
1547 
1548 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1549  pos = asf_st->packet_pos;
1550  av_assert1(pkt->pos == asf_st->packet_pos);
1551 
1552  av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1553  pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1554  start_pos[i] = asf_st->packet_pos + 1;
1555 
1556  if (pkt->stream_index == stream_index) {
1557  av_packet_unref(pkt);
1558  break;
1559  }
1560  }
1561  av_packet_unref(pkt);
1562  }
1563 
1564  *ppos = pos;
1565  return pts;
1566 }
1567 
1568 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1569 {
1570  ff_asf_guid g;
1571  ASFContext *asf = s->priv_data;
1572  int64_t current_pos = avio_tell(s->pb);
1573  int64_t ret;
1574 
1575  if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1576  return ret;
1577  }
1578 
1579  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1580  goto end;
1581 
1582  /* the data object can be followed by other top-level objects,
1583  * skip them until the simple index object is reached */
1584  while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1585  int64_t gsize = avio_rl64(s->pb);
1586  if (gsize < 24 || avio_feof(s->pb)) {
1587  goto end;
1588  }
1589  avio_skip(s->pb, gsize - 24);
1590  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1591  goto end;
1592  }
1593 
1594  {
1595  int64_t itime, last_pos = -1;
1596  int pct, ict;
1597  int i;
1598  int64_t av_unused gsize = avio_rl64(s->pb);
1599  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1600  goto end;
1601  itime = avio_rl64(s->pb);
1602  pct = avio_rl32(s->pb);
1603  ict = avio_rl32(s->pb);
1604  av_log(s, AV_LOG_DEBUG,
1605  "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1606 
1607  for (i = 0; i < ict; i++) {
1608  int pktnum = avio_rl32(s->pb);
1609  int pktct = avio_rl16(s->pb);
1610  int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1611  int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1612 
1613  if (avio_feof(s->pb)) {
1614  ret = AVERROR_INVALIDDATA;
1615  goto end;
1616  }
1617 
1618  if (pos != last_pos) {
1619  av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1620  pktnum, pktct, index_pts);
1621  av_add_index_entry(s->streams[stream_index], pos, index_pts,
1622  s->packet_size, 0, AVINDEX_KEYFRAME);
1623  last_pos = pos;
1624  }
1625  }
1626  asf->index_read = ict > 1;
1627  }
1628 end:
1629 // if (avio_feof(s->pb)) {
1630 // ret = 0;
1631 // }
1632  avio_seek(s->pb, current_pos, SEEK_SET);
1633  return ret;
1634 }
1635 
1636 static int asf_read_seek(AVFormatContext *s, int stream_index,
1637  int64_t pts, int flags)
1638 {
1639  ASFContext *asf = s->priv_data;
1640  AVStream *st = s->streams[stream_index];
1641  int ret = 0;
1642 
1643  if (s->packet_size <= 0)
1644  return -1;
1645 
1646  /* Try using the protocol's read_seek if available */
1647  if (s->pb) {
1648  int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1649  if (ret >= 0)
1650  asf_reset_header(s);
1651  if (ret != AVERROR(ENOSYS))
1652  return ret;
1653  }
1654 
1655  /* explicitly handle the case of seeking to 0 */
1656  if (!pts) {
1657  asf_reset_header(s);
1658  avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1659  return 0;
1660  }
1661 
1662  if (!asf->index_read) {
1663  ret = asf_build_simple_index(s, stream_index);
1664  if (ret < 0)
1665  asf->index_read = -1;
1666  }
1667 
1668  if (asf->index_read > 0 && st->index_entries) {
1669  int index = av_index_search_timestamp(st, pts, flags);
1670  if (index >= 0) {
1671  /* find the position */
1672  uint64_t pos = st->index_entries[index].pos;
1673 
1674  /* do the seek */
1675  av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1676  if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1677  return -1;
1678  asf_reset_header(s);
1679  skip_to_key(s);
1680  return 0;
1681  }
1682  }
1683  /* no index or seeking by index failed */
1684  if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1685  return -1;
1686  asf_reset_header(s);
1687  skip_to_key(s);
1688  return 0;
1689 }
1690 
1692  .name = "asf",
1693  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1694  .priv_data_size = sizeof(ASFContext),
1695  .read_probe = asf_probe,
1700  .read_timestamp = asf_read_pts,
1702  .priv_class = &asf_class,
1703 };
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:1453
#define NULL
Definition: coverity.c:32
discard all frames except keyframes
Definition: avcodec.h:821
#define AVFMT_NOBINSEARCH
Format does not allow to fall back on binary search via read_timestamp.
Definition: avformat.h:492
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:155
#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:321
#define DO_2BITS(bits, var, defval)
Definition: asfdec_f.c:931
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:125
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:1489
int packet_segments
Definition: asfdec_f.c:96
AVOption.
Definition: opt.h:246
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:1980
const ff_asf_guid ff_asf_codec_comment_header
Definition: asf.c:73
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:3050
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:85
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1677
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:4601
const char * g
Definition: vf_curves.c:112
const char * desc
Definition: nvenc.c:60
int64_t pos
Definition: avformat.h:820
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:4066
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:959
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:890
int size
Definition: avcodec.h:1658
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:231
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1092
int skip_to_key
Definition: asfdec_f.c:56
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1780
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:316
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
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
discard all
Definition: avcodec.h:822
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:1126
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:4358
Format I/O context.
Definition: avformat.h:1349
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:1859
#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:226
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:328
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:203
int width
Video only.
Definition: avcodec.h:4132
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:1436
#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:1081
int id
Format-specific stream ID.
Definition: avformat.h:896
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:4231
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
int packet_size_left
Definition: asfdec_f.c:83
static void finish(void)
Definition: movenc.c:344
uint8_t * data
Definition: avcodec.h:1657
static int flags
Definition: log.c:57
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:289
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:525
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_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:616
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
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:4095
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1689
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:827
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:214
#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:1567
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: avcodec.h:1403
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:2089
static const AVOption options[]
Definition: asfdec_f.c:120
static int asf_build_simple_index(AVFormatContext *s, int stream_index)
Definition: asfdec_f.c:1568
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:738
#define AVERROR(e)
Definition: error.h:43
const char * ff_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
Convert a language code to a target codespace.
Definition: avlanguage.c:736
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
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:4062
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1640
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1110
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:1669
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:89
const char * ff_id3v2_picture_types[21]
Definition: id3v2.c:105
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1663
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:4084
Definition: asf.h:32
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:607
uint32_t max_pktsize
shall be the same as for min_pktsize invalid if broadcasting
Definition: asf.h:57
static int asf_read_close(AVFormatContext *s)
Definition: asfdec_f.c:1504
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
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:1511
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1405
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:684
AVDictionary * metadata
Definition: avformat.h:961
const ff_asf_guid ff_asf_my_guid
Definition: asf.c:126
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
Definition: asfdec_f.c:1078
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:219
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
Definition: asfdec_f.c:1636
#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:859
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:510
uint8_t ff_asf_guid[16]
Definition: riff.h:89
Stream structure.
Definition: avformat.h:889
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:67
AVIOContext * pb
I/O context.
Definition: avformat.h:1391
const ff_asf_guid ff_asf_video_stream
Definition: asf.c:53
AVInputFormat ff_asf_demuxer
Definition: asfdec_f.c:1691
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:589
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:493
void * buf
Definition: avisynth_c.h:690
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:70
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 (pair of numerator and denominator).
Definition: rational.h:58
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:277
unsigned int packet_frag_offset
Definition: asfdec_f.c:101
byte swapping routines
AVMediaType
Definition: avutil.h:199
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:236
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
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:1710
full parsing and repack of the first frame only, only implemented for H.264 currently ...
Definition: avformat.h:813
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.
uint8_t type
Definition: asfdec_f.c:43
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:946
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:473
const uint8_t * key
Definition: avformat.h:1503
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:810
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:722
Main libavformat public API header.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1668
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:778
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:950
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:1104
int den
Denominator.
Definition: rational.h:60
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:769
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:1141
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:1377
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:4108
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:4080
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:1656
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:664
AVCodecParameters * codecpar
Definition: avformat.h:1252
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:340
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:4070
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:79
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:1207
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:329
int stream_index
Definition: avcodec.h:1659
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:952
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:115
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1127
enum AVCodecID id
This structure stores compressed data.
Definition: avcodec.h:1634
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:746
#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:956
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:1650
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:979
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:248
int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().
Definition: utils.c:2104
#define av_unused
Definition: attributes.h:125
static void asf_reset_header(AVFormatContext *s)
Definition: asfdec_f.c:1456
const char * name
Definition: opengl_enc.c:103