FFmpeg  4.3
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 
71  ASFPayload payload[8];
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)
79  AVRational dar[128];
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(const 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_parse_chapters(s, id3v2_extra_meta);
313  }
314  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
315 }
316 
317 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
318 {
319  ASFContext *asf = s->priv_data;
320  char *value = NULL;
321  int64_t off = avio_tell(s->pb);
322 #define LEN 22
323 
324  av_assert0((unsigned)len < (INT_MAX - LEN) / 2);
325 
326  if (!asf->export_xmp && !strncmp(key, "xmp", 3))
327  goto finish;
328 
329  value = av_malloc(2 * len + LEN);
330  if (!value)
331  goto finish;
332 
333  switch (type) {
334  case ASF_UNICODE:
335  avio_get_str16le(s->pb, len, value, 2 * len + 1);
336  break;
337  case -1: // ASCI
338  avio_read(s->pb, value, len);
339  value[len]=0;
340  break;
341  case ASF_BYTE_ARRAY:
342  if (!strcmp(key, "WM/Picture")) { // handle cover art
343  asf_read_picture(s, len);
344  } else if (!strcmp(key, "ID3")) { // handle ID3 tag
345  get_id3_tag(s, len);
346  } else {
347  av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
348  }
349  goto finish;
350  case ASF_BOOL:
351  case ASF_DWORD:
352  case ASF_QWORD:
353  case ASF_WORD: {
354  uint64_t num = get_value(s->pb, type, type2_size);
355  snprintf(value, LEN, "%"PRIu64, num);
356  break;
357  }
358  case ASF_GUID:
359  av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
360  goto finish;
361  default:
362  av_log(s, AV_LOG_DEBUG,
363  "Unsupported value type %d in tag %s.\n", type, key);
364  goto finish;
365  }
366  if (*value)
367  av_dict_set(&s->metadata, key, value, 0);
368 
369 finish:
370  av_freep(&value);
371  avio_seek(s->pb, off + len, SEEK_SET);
372 }
373 
375 {
376  ASFContext *asf = s->priv_data;
377  AVIOContext *pb = s->pb;
378 
379  ff_get_guid(pb, &asf->hdr.guid);
380  asf->hdr.file_size = avio_rl64(pb);
381  asf->hdr.create_time = avio_rl64(pb);
382  avio_rl64(pb); /* number of packets */
383  asf->hdr.play_time = avio_rl64(pb);
384  asf->hdr.send_time = avio_rl64(pb);
385  asf->hdr.preroll = avio_rl32(pb);
386  asf->hdr.ignore = avio_rl32(pb);
387  asf->hdr.flags = avio_rl32(pb);
388  asf->hdr.min_pktsize = avio_rl32(pb);
389  asf->hdr.max_pktsize = avio_rl32(pb);
390  if (asf->hdr.min_pktsize >= (1U << 29))
391  return AVERROR_INVALIDDATA;
392  asf->hdr.max_bitrate = avio_rl32(pb);
393  s->packet_size = asf->hdr.max_pktsize;
394 
395  return 0;
396 }
397 
399 {
400  ASFContext *asf = s->priv_data;
401  AVIOContext *pb = s->pb;
402  AVStream *st;
403  ASFStream *asf_st;
404  ff_asf_guid g;
405  enum AVMediaType type;
406  int type_specific_size, sizeX;
407  unsigned int tag1;
408  int64_t pos1, pos2, start_time;
409  int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
410 
411  if (s->nb_streams == ASF_MAX_STREAMS) {
412  av_log(s, AV_LOG_ERROR, "too many streams\n");
413  return AVERROR(EINVAL);
414  }
415 
416  pos1 = avio_tell(pb);
417 
418  st = avformat_new_stream(s, NULL);
419  if (!st)
420  return AVERROR(ENOMEM);
421  avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
422  start_time = asf->hdr.preroll;
423 
424  if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
425  int64_t fsize = avio_size(pb);
426  if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 ||
427  20*FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size))
428  st->duration = asf->hdr.play_time /
429  (10000000 / 1000) - start_time;
430  }
431  ff_get_guid(pb, &g);
432 
433  test_for_ext_stream_audio = 0;
434  if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
435  type = AVMEDIA_TYPE_AUDIO;
436  } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
437  type = AVMEDIA_TYPE_VIDEO;
438  } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
439  type = AVMEDIA_TYPE_VIDEO;
441  } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
442  type = AVMEDIA_TYPE_DATA;
444  test_for_ext_stream_audio = 1;
445  type = AVMEDIA_TYPE_UNKNOWN;
446  } else {
447  return -1;
448  }
449  ff_get_guid(pb, &g);
450  avio_skip(pb, 8); /* total_size */
451  type_specific_size = avio_rl32(pb);
452  avio_rl32(pb);
453  st->id = avio_rl16(pb) & 0x7f; /* stream id */
454  // mapping of asf ID to AV stream ID;
455  asf->asfid2avid[st->id] = s->nb_streams - 1;
456  asf_st = &asf->streams[st->id];
457 
458  avio_rl32(pb);
459 
460  if (test_for_ext_stream_audio) {
461  ff_get_guid(pb, &g);
463  type = AVMEDIA_TYPE_AUDIO;
464  is_dvr_ms_audio = 1;
465  ff_get_guid(pb, &g);
466  avio_rl32(pb);
467  avio_rl32(pb);
468  avio_rl32(pb);
469  ff_get_guid(pb, &g);
470  avio_rl32(pb);
471  }
472  }
473 
474  st->codecpar->codec_type = type;
475  if (type == AVMEDIA_TYPE_AUDIO) {
476  int ret = ff_get_wav_header(s, pb, st->codecpar, type_specific_size, 0);
477  if (ret < 0)
478  return ret;
479  if (is_dvr_ms_audio) {
480  // codec_id and codec_tag are unreliable in dvr_ms
481  // files. Set them later by probing stream.
482  st->request_probe = 1;
483  st->codecpar->codec_tag = 0;
484  }
485  if (st->codecpar->codec_id == AV_CODEC_ID_AAC)
487  else
489  /* We have to init the frame size at some point .... */
490  pos2 = avio_tell(pb);
491  if (size >= (pos2 + 8 - pos1 + 24)) {
492  asf_st->ds_span = avio_r8(pb);
493  asf_st->ds_packet_size = avio_rl16(pb);
494  asf_st->ds_chunk_size = avio_rl16(pb);
495  avio_rl16(pb); // ds_data_size
496  avio_r8(pb); // ds_silence_data
497  }
498  if (asf_st->ds_span > 1) {
499  if (!asf_st->ds_chunk_size ||
500  (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
501  asf_st->ds_packet_size % asf_st->ds_chunk_size)
502  asf_st->ds_span = 0; // disable descrambling
503  }
504  } else if (type == AVMEDIA_TYPE_VIDEO &&
505  size - (avio_tell(pb) - pos1 + 24) >= 51) {
506  avio_rl32(pb);
507  avio_rl32(pb);
508  avio_r8(pb);
509  avio_rl16(pb); /* size */
510  sizeX = avio_rl32(pb); /* size */
511  st->codecpar->width = avio_rl32(pb);
512  st->codecpar->height = avio_rl32(pb);
513  /* not available for asf */
514  avio_rl16(pb); /* panes */
515  st->codecpar->bits_per_coded_sample = avio_rl16(pb); /* depth */
516  tag1 = avio_rl32(pb);
517  avio_skip(pb, 20);
518  if (sizeX > 40) {
519  st->codecpar->extradata_size = ffio_limit(pb, sizeX - 40);
522  if (!st->codecpar->extradata)
523  return AVERROR(ENOMEM);
525  }
526 
527  /* Extract palette from extradata if bpp <= 8 */
528  /* This code assumes that extradata contains only palette */
529  /* This is true for all paletted codecs implemented in libavcodec */
530  if (st->codecpar->extradata_size && (st->codecpar->bits_per_coded_sample <= 8)) {
531 #if HAVE_BIGENDIAN
532  int i;
533  for (i = 0; i < FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE) / 4; i++)
534  asf_st->palette[i] = av_bswap32(((uint32_t *)st->codecpar->extradata)[i]);
535 #else
536  memcpy(asf_st->palette, st->codecpar->extradata,
538 #endif
539  asf_st->palette_changed = 1;
540  }
541 
542  st->codecpar->codec_tag = tag1;
544  if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
546  /* issue658 contains wrong w/h and MS even puts a fake seq header
547  * with wrong w/h in extradata while a correct one is in the stream.
548  * maximum lameness */
549  st->codecpar->width =
550  st->codecpar->height = 0;
551  av_freep(&st->codecpar->extradata);
552  st->codecpar->extradata_size = 0;
553  }
554  if (st->codecpar->codec_id == AV_CODEC_ID_H264)
556  if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4)
558  }
559  pos2 = avio_tell(pb);
560  avio_skip(pb, size - (pos2 - pos1 + 24));
561 
562  return 0;
563 }
564 
566 {
567  ASFContext *asf = s->priv_data;
568  AVIOContext *pb = s->pb;
569  ff_asf_guid g;
570  int ext_len, payload_ext_ct, stream_ct, i;
571  uint32_t leak_rate, stream_num;
572  unsigned int stream_languageid_index;
573 
574  avio_rl64(pb); // starttime
575  avio_rl64(pb); // endtime
576  leak_rate = avio_rl32(pb); // leak-datarate
577  avio_rl32(pb); // bucket-datasize
578  avio_rl32(pb); // init-bucket-fullness
579  avio_rl32(pb); // alt-leak-datarate
580  avio_rl32(pb); // alt-bucket-datasize
581  avio_rl32(pb); // alt-init-bucket-fullness
582  avio_rl32(pb); // max-object-size
583  avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
584  stream_num = avio_rl16(pb); // stream-num
585 
586  stream_languageid_index = avio_rl16(pb); // stream-language-id-index
587  if (stream_num < 128)
588  asf->streams[stream_num].stream_language_index = stream_languageid_index;
589 
590  avio_rl64(pb); // avg frametime in 100ns units
591  stream_ct = avio_rl16(pb); // stream-name-count
592  payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
593 
594  if (stream_num < 128) {
595  asf->stream_bitrates[stream_num] = leak_rate;
596  asf->streams[stream_num].payload_ext_ct = 0;
597  }
598 
599  for (i = 0; i < stream_ct; i++) {
600  avio_rl16(pb);
601  ext_len = avio_rl16(pb);
602  avio_skip(pb, ext_len);
603  }
604 
605  for (i = 0; i < payload_ext_ct; i++) {
606  int size;
607  ff_get_guid(pb, &g);
608  size = avio_rl16(pb);
609  ext_len = avio_rl32(pb);
610  avio_skip(pb, ext_len);
611  if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
612  ASFPayload *p = &asf->streams[stream_num].payload[i];
613  p->type = g[0];
614  p->size = size;
615  av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
616  asf->streams[stream_num].payload_ext_ct ++;
617  }
618  }
619 
620  return 0;
621 }
622 
624 {
625  AVIOContext *pb = s->pb;
626  int len1, len2, len3, len4, len5;
627 
628  len1 = avio_rl16(pb);
629  len2 = avio_rl16(pb);
630  len3 = avio_rl16(pb);
631  len4 = avio_rl16(pb);
632  len5 = avio_rl16(pb);
633  get_tag(s, "title", 0, len1, 32);
634  get_tag(s, "author", 0, len2, 32);
635  get_tag(s, "copyright", 0, len3, 32);
636  get_tag(s, "comment", 0, len4, 32);
637  avio_skip(pb, len5);
638 
639  return 0;
640 }
641 
643 {
644  AVIOContext *pb = s->pb;
645  ASFContext *asf = s->priv_data;
646  int desc_count, i, ret;
647 
648  desc_count = avio_rl16(pb);
649  for (i = 0; i < desc_count; i++) {
650  int name_len, value_type, value_len;
651  char name[1024];
652 
653  name_len = avio_rl16(pb);
654  if (name_len % 2) // must be even, broken lavf versions wrote len-1
655  name_len += 1;
656  if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
657  avio_skip(pb, name_len - ret);
658  value_type = avio_rl16(pb);
659  value_len = avio_rl16(pb);
660  if (!value_type && value_len % 2)
661  value_len += 1;
662  /* My sample has that stream set to 0 maybe that mean the container.
663  * ASF stream count starts at 1. I am using 0 to the container value
664  * since it's unused. */
665  if (!strcmp(name, "AspectRatioX"))
666  asf->dar[0].num = get_value(s->pb, value_type, 32);
667  else if (!strcmp(name, "AspectRatioY"))
668  asf->dar[0].den = get_value(s->pb, value_type, 32);
669  else
670  get_tag(s, name, value_type, value_len, 32);
671  }
672 
673  return 0;
674 }
675 
677 {
678  AVIOContext *pb = s->pb;
679  ASFContext *asf = s->priv_data;
680  int j, ret;
681  int stream_count = avio_rl16(pb);
682  for (j = 0; j < stream_count; j++) {
683  char lang[6];
684  unsigned int lang_len = avio_r8(pb);
685  if ((ret = avio_get_str16le(pb, lang_len, lang,
686  sizeof(lang))) < lang_len)
687  avio_skip(pb, lang_len - ret);
688  if (j < 128)
689  av_strlcpy(asf->stream_languages[j], lang,
690  sizeof(*asf->stream_languages));
691  }
692 
693  return 0;
694 }
695 
697 {
698  AVIOContext *pb = s->pb;
699  ASFContext *asf = s->priv_data;
700  int n, stream_num, name_len_utf16, name_len_utf8, value_len;
701  int ret, i;
702  n = avio_rl16(pb);
703 
704  for (i = 0; i < n; i++) {
705  uint8_t *name;
706  int value_type;
707 
708  avio_rl16(pb); // lang_list_index
709  stream_num = avio_rl16(pb);
710  name_len_utf16 = avio_rl16(pb);
711  value_type = avio_rl16(pb); /* value_type */
712  value_len = avio_rl32(pb);
713 
714  if (value_len < 0 || value_len > UINT16_MAX)
715  return AVERROR_INVALIDDATA;
716 
717  name_len_utf8 = 2*name_len_utf16 + 1;
718  name = av_malloc(name_len_utf8);
719  if (!name)
720  return AVERROR(ENOMEM);
721 
722  if ((ret = avio_get_str16le(pb, name_len_utf16, name, name_len_utf8)) < name_len_utf16)
723  avio_skip(pb, name_len_utf16 - ret);
724  av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
725  i, stream_num, name_len_utf16, value_type, value_len, name);
726 
727  if (!strcmp(name, "AspectRatioX")){
728  int aspect_x = get_value(s->pb, value_type, 16);
729  if(stream_num < 128)
730  asf->dar[stream_num].num = aspect_x;
731  } else if(!strcmp(name, "AspectRatioY")){
732  int aspect_y = get_value(s->pb, value_type, 16);
733  if(stream_num < 128)
734  asf->dar[stream_num].den = aspect_y;
735  } else {
736  get_tag(s, name, value_type, value_len, 16);
737  }
738  av_freep(&name);
739  }
740 
741  return 0;
742 }
743 
744 static int asf_read_marker(AVFormatContext *s, int64_t size)
745 {
746  AVIOContext *pb = s->pb;
747  ASFContext *asf = s->priv_data;
748  int i, count, name_len, ret;
749  char name[1024];
750 
751  avio_rl64(pb); // reserved 16 bytes
752  avio_rl64(pb); // ...
753  count = avio_rl32(pb); // markers count
754  avio_rl16(pb); // reserved 2 bytes
755  name_len = avio_rl16(pb); // name length
756  avio_skip(pb, name_len);
757 
758  for (i = 0; i < count; i++) {
759  int64_t pres_time;
760  int name_len;
761 
762  if (avio_feof(pb))
763  return AVERROR_INVALIDDATA;
764 
765  avio_rl64(pb); // offset, 8 bytes
766  pres_time = avio_rl64(pb); // presentation time
767  pres_time -= asf->hdr.preroll * 10000;
768  avio_rl16(pb); // entry length
769  avio_rl32(pb); // send time
770  avio_rl32(pb); // flags
771  name_len = avio_rl32(pb); // name length
772  if ((ret = avio_get_str16le(pb, name_len * 2, name,
773  sizeof(name))) < name_len)
774  avio_skip(pb, name_len - ret);
775  avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
777  }
778 
779  return 0;
780 }
781 
783 {
784  ASFContext *asf = s->priv_data;
785  ff_asf_guid g;
786  AVIOContext *pb = s->pb;
787  int i;
788  int64_t gsize;
789 
790  ff_get_guid(pb, &g);
791  if (ff_guidcmp(&g, &ff_asf_header))
792  return AVERROR_INVALIDDATA;
793  avio_rl64(pb);
794  avio_rl32(pb);
795  avio_r8(pb);
796  avio_r8(pb);
797  memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
798 
799  for (i = 0; i<128; i++)
800  asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
801 
802  for (;;) {
803  uint64_t gpos = avio_tell(pb);
804  int ret = 0;
805  ff_get_guid(pb, &g);
806  gsize = avio_rl64(pb);
807  print_guid(&g);
808  if (!ff_guidcmp(&g, &ff_asf_data_header)) {
809  asf->data_object_offset = avio_tell(pb);
810  /* If not streaming, gsize is not unlimited (how?),
811  * and there is enough space in the file.. */
812  if (!(asf->hdr.flags & 0x01) && gsize >= 100)
813  asf->data_object_size = gsize - 24;
814  else
815  asf->data_object_size = (uint64_t)-1;
816  break;
817  }
818  if (gsize < 24)
819  return AVERROR_INVALIDDATA;
820  if (!ff_guidcmp(&g, &ff_asf_file_header)) {
821  ret = asf_read_file_properties(s, gsize);
822  } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
823  ret = asf_read_stream_properties(s, gsize);
824  } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
825  asf_read_content_desc(s, gsize);
826  } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
827  asf_read_language_list(s, gsize);
828  } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
829  asf_read_ext_content_desc(s, gsize);
830  } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
831  asf_read_metadata(s, gsize);
832  } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
833  asf_read_metadata(s, gsize);
834  } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
836 
837  // there could be an optional stream properties object to follow
838  // if so the next iteration will pick it up
839  continue;
840  } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
841  ff_get_guid(pb, &g);
842  avio_skip(pb, 6);
843  continue;
844  } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
845  asf_read_marker(s, gsize);
846  } else if (avio_feof(pb)) {
847  return AVERROR_EOF;
848  } else {
849  if (!s->keylen) {
851  unsigned int len;
852  AVPacket pkt;
854  "DRM protected stream detected, decoding will likely fail!\n");
855  len= avio_rl32(pb);
856  av_log(s, AV_LOG_DEBUG, "Secret data:\n");
857 
858  if ((ret = av_get_packet(pb, &pkt, len)) < 0)
859  return ret;
860  av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
861  av_packet_unref(&pkt);
862 
863  len= avio_rl32(pb);
864  if (len > UINT16_MAX)
865  return AVERROR_INVALIDDATA;
866  get_tag(s, "ASF_Protection_Type", -1, len, 32);
867 
868  len= avio_rl32(pb);
869  if (len > UINT16_MAX)
870  return AVERROR_INVALIDDATA;
871  get_tag(s, "ASF_Key_ID", -1, len, 32);
872 
873  len= avio_rl32(pb);
874  if (len > UINT16_MAX)
875  return AVERROR_INVALIDDATA;
876  get_tag(s, "ASF_License_URL", -1, len, 32);
877  } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
879  "Ext DRM protected stream detected, decoding will likely fail!\n");
880  av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
881  } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
882  av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
883  }
884  }
885  }
886  if (ret < 0)
887  return ret;
888 
889  if (avio_tell(pb) != gpos + gsize)
890  av_log(s, AV_LOG_DEBUG,
891  "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
892  avio_tell(pb) - gpos, gsize);
893  avio_seek(pb, gpos + gsize, SEEK_SET);
894  }
895  ff_get_guid(pb, &g);
896  avio_rl64(pb);
897  avio_r8(pb);
898  avio_r8(pb);
899  if (avio_feof(pb))
900  return AVERROR_EOF;
901  asf->data_offset = avio_tell(pb);
902  asf->packet_size_left = 0;
903 
904  for (i = 0; i < 128; i++) {
905  int stream_num = asf->asfid2avid[i];
906  if (stream_num >= 0) {
907  AVStream *st = s->streams[stream_num];
908  if (!st->codecpar->bit_rate)
909  st->codecpar->bit_rate = asf->stream_bitrates[i];
910  if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
913  asf->dar[i].num, asf->dar[i].den, INT_MAX);
914  } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
915  // Use ASF container value if the stream doesn't set AR.
919  asf->dar[0].num, asf->dar[0].den, INT_MAX);
920 
921  av_log(s, AV_LOG_TRACE, "i=%d, st->codecpar->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
922  i, st->codecpar->codec_type, asf->dar[i].num, asf->dar[i].den,
924 
925  // copy and convert language codes to the frontend
926  if (asf->streams[i].stream_language_index < 128) {
927  const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
928  if (rfc1766 && strlen(rfc1766) > 1) {
929  const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
930  const char *iso6392 = ff_convert_lang_to(primary_tag,
932  if (iso6392)
933  av_dict_set(&st->metadata, "language", iso6392, 0);
934  }
935  }
936  }
937  }
938 
940 
941  return 0;
942 }
943 
944 #define DO_2BITS(bits, var, defval) \
945  switch (bits & 3) { \
946  case 3: \
947  var = avio_rl32(pb); \
948  rsize += 4; \
949  break; \
950  case 2: \
951  var = avio_rl16(pb); \
952  rsize += 2; \
953  break; \
954  case 1: \
955  var = avio_r8(pb); \
956  rsize++; \
957  break; \
958  default: \
959  var = defval; \
960  break; \
961  }
962 
963 /**
964  * Load a single ASF packet into the demuxer.
965  * @param s demux context
966  * @param pb context to read data from
967  * @return 0 on success, <0 on error
968  */
970 {
971  ASFContext *asf = s->priv_data;
972  uint32_t packet_length, padsize;
973  int rsize = 8;
974  int c, d, e, off;
975 
976  if (asf->uses_std_ecc > 0) {
977  // if we do not know packet size, allow skipping up to 32 kB
978  off = 32768;
979  if (asf->no_resync_search)
980  off = 3;
981 // else if (s->packet_size > 0 && !asf->uses_std_ecc)
982 // off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
983 
984  c = d = e = -1;
985  while (off-- > 0) {
986  c = d;
987  d = e;
988  e = avio_r8(pb);
989  if (c == 0x82 && !d && !e)
990  break;
991  }
992 
993  if (c != 0x82) {
994  /* This code allows handling of -EAGAIN at packet boundaries (i.e.
995  * if the packet sync code above triggers -EAGAIN). This does not
996  * imply complete -EAGAIN handling support at random positions in
997  * the stream. */
998  if (pb->error == AVERROR(EAGAIN))
999  return AVERROR(EAGAIN);
1000  if (!avio_feof(pb))
1001  av_log(s, AV_LOG_ERROR,
1002  "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
1003  }
1004  if ((c & 0x8f) == 0x82) {
1005  if (d || e) {
1006  if (!avio_feof(pb))
1007  av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
1008  return AVERROR_INVALIDDATA;
1009  }
1010  c = avio_r8(pb);
1011  d = avio_r8(pb);
1012  rsize += 3;
1013  } else if(!avio_feof(pb)) {
1014  avio_seek(pb, -1, SEEK_CUR); // FIXME
1015  }
1016  } else {
1017  c = avio_r8(pb);
1018  if (c & 0x80) {
1019  rsize ++;
1020  if (!(c & 0x60)) {
1021  d = avio_r8(pb);
1022  e = avio_r8(pb);
1023  avio_seek(pb, (c & 0xF) - 2, SEEK_CUR);
1024  rsize += c & 0xF;
1025  }
1026 
1027  if (c != 0x82)
1028  avpriv_request_sample(s, "Invalid ECC byte");
1029 
1030  if (!asf->uses_std_ecc)
1031  asf->uses_std_ecc = (c == 0x82 && !d && !e) ? 1 : -1;
1032 
1033  c = avio_r8(pb);
1034  } else
1035  asf->uses_std_ecc = -1;
1036  d = avio_r8(pb);
1037  }
1038 
1039  asf->packet_flags = c;
1040  asf->packet_property = d;
1041 
1042  DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
1043  DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1044  DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1045 
1046  // the following checks prevent overflows and infinite loops
1047  if (!packet_length || packet_length >= (1U << 29)) {
1048  av_log(s, AV_LOG_ERROR,
1049  "invalid packet_length %"PRIu32" at:%"PRId64"\n",
1050  packet_length, avio_tell(pb));
1051  return AVERROR_INVALIDDATA;
1052  }
1053  if (padsize >= packet_length) {
1054  av_log(s, AV_LOG_ERROR,
1055  "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
1056  return AVERROR_INVALIDDATA;
1057  }
1058 
1059  asf->packet_timestamp = avio_rl32(pb);
1060  avio_rl16(pb); /* duration */
1061  // rsize has at least 11 bytes which have to be present
1062 
1063  if (asf->packet_flags & 0x01) {
1064  asf->packet_segsizetype = avio_r8(pb);
1065  rsize++;
1066  asf->packet_segments = asf->packet_segsizetype & 0x3f;
1067  } else {
1068  asf->packet_segments = 1;
1069  asf->packet_segsizetype = 0x80;
1070  }
1071  if (rsize > packet_length - padsize) {
1072  asf->packet_size_left = 0;
1073  av_log(s, AV_LOG_ERROR,
1074  "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
1075  rsize, packet_length, padsize, avio_tell(pb));
1076  return AVERROR_INVALIDDATA;
1077  }
1078  asf->packet_size_left = packet_length - padsize - rsize;
1079  if (packet_length < asf->hdr.min_pktsize)
1080  padsize += asf->hdr.min_pktsize - packet_length;
1081  asf->packet_padsize = padsize;
1082  av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
1084  return 0;
1085 }
1086 
1087 /**
1088  *
1089  * @return <0 if error
1090  */
1092 {
1093  ASFContext *asf = s->priv_data;
1094  ASFStream *asfst;
1095  int rsize = 1;
1096  int num = avio_r8(pb);
1097  int i;
1098  int64_t ts0, ts1 av_unused;
1099 
1100  asf->packet_segments--;
1101  asf->packet_key_frame = num >> 7;
1102  asf->stream_index = asf->asfid2avid[num & 0x7f];
1103  asfst = &asf->streams[num & 0x7f];
1104  // sequence should be ignored!
1105  DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1106  DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1108  av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d num:%X packet_property %X\n",
1109  asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1110  asf->packet_frag_offset, asf->packet_replic_size, num, asf->packet_property);
1111  if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1112  av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1113  return AVERROR_INVALIDDATA;
1114  }
1115  if (asf->packet_replic_size >= 8) {
1116  int64_t end = avio_tell(pb) + asf->packet_replic_size;
1117  AVRational aspect;
1118  asfst->packet_obj_size = avio_rl32(pb);
1119  if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1120  av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1121  asfst->packet_obj_size = 0;
1122  return AVERROR_INVALIDDATA;
1123  }
1124  asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1125 
1126  for (i = 0; i < asfst->payload_ext_ct; i++) {
1127  ASFPayload *p = &asfst->payload[i];
1128  int size = p->size;
1129  int64_t payend;
1130  if (size == 0xFFFF)
1131  size = avio_rl16(pb);
1132  payend = avio_tell(pb) + size;
1133  if (payend > end) {
1134  av_log(s, AV_LOG_ERROR, "too long payload\n");
1135  break;
1136  }
1137  switch (p->type) {
1138  case 0x50:
1139 // duration = avio_rl16(pb);
1140  break;
1141  case 0x54:
1142  aspect.num = avio_r8(pb);
1143  aspect.den = avio_r8(pb);
1144  if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1145  s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1146  }
1147  break;
1148  case 0x2A:
1149  avio_skip(pb, 8);
1150  ts0 = avio_rl64(pb);
1151  ts1 = avio_rl64(pb);
1152  if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1154  asf->ts_is_pts = 1;
1155  break;
1156  case 0x5B:
1157  case 0xB7:
1158  case 0xCC:
1159  case 0xC0:
1160  case 0xA0:
1161  //unknown
1162  break;
1163  }
1164  avio_seek(pb, payend, SEEK_SET);
1165  }
1166 
1167  avio_seek(pb, end, SEEK_SET);
1168  rsize += asf->packet_replic_size; // FIXME - check validity
1169  } else if (asf->packet_replic_size == 1) {
1170  // multipacket - frag_offset is beginning timestamp
1172  asf->packet_frag_offset = 0;
1174 
1175  asf->packet_time_delta = avio_r8(pb);
1176  rsize++;
1177  } else if (asf->packet_replic_size != 0) {
1178  av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1179  asf->packet_replic_size);
1180  return AVERROR_INVALIDDATA;
1181  }
1182  if (asf->packet_flags & 0x01) {
1183  DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1184  if (rsize > asf->packet_size_left) {
1185  av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1186  return AVERROR_INVALIDDATA;
1187  } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1188  if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1189  av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d>%d-%d+%d)\n",
1190  asf->packet_frag_size, asf->packet_size_left, rsize, asf->packet_padsize);
1191  return AVERROR_INVALIDDATA;
1192  } else {
1193  int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1194  asf->packet_size_left += diff;
1195  asf->packet_padsize -= diff;
1196  }
1197  }
1198  } else {
1199  asf->packet_frag_size = asf->packet_size_left - rsize;
1200  }
1201  if (asf->packet_replic_size == 1) {
1202  asf->packet_multi_size = asf->packet_frag_size;
1203  if (asf->packet_multi_size > asf->packet_size_left)
1204  return AVERROR_INVALIDDATA;
1205  }
1206  asf->packet_size_left -= rsize;
1207 
1208  return 0;
1209 }
1210 
1211 /**
1212  * Parse data from individual ASF packets (which were previously loaded
1213  * with asf_get_packet()).
1214  * @param s demux context
1215  * @param pb context to read data from
1216  * @param pkt pointer to store packet data into
1217  * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1218  * packets need to be loaded (through asf_get_packet())
1219  */
1221 {
1222  ASFContext *asf = s->priv_data;
1223  ASFStream *asf_st = 0;
1224  for (;;) {
1225  int ret;
1226  if (avio_feof(pb))
1227  return AVERROR_EOF;
1228  if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1229  asf->packet_segments < 1 && asf->packet_time_start == 0) {
1230  int ret = asf->packet_size_left + asf->packet_padsize;
1231 
1233  av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1234 
1235  assert(ret >= 0);
1236  /* fail safe */
1237  avio_skip(pb, ret);
1238 
1239  asf->packet_pos = avio_tell(pb);
1240  if (asf->data_object_size != (uint64_t)-1 &&
1241  (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1242  return AVERROR_EOF; /* Do not exceed the size of the data object */
1243  return 1;
1244  }
1245  if (asf->packet_time_start == 0) {
1246  if (asf_read_frame_header(s, pb) < 0) {
1247  asf->packet_time_start = asf->packet_segments = 0;
1248  continue;
1249  }
1250  if (asf->stream_index < 0 ||
1251  s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1252  (!asf->packet_key_frame &&
1253  (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1254  asf->packet_time_start = 0;
1255  /* unhandled packet (should not happen) */
1256  avio_skip(pb, asf->packet_frag_size);
1257  asf->packet_size_left -= asf->packet_frag_size;
1258  if (asf->stream_index < 0)
1259  av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1260  asf->packet_frag_size);
1261  continue;
1262  }
1263  asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1264  if (!asf->packet_frag_offset)
1265  asf->asf_st->skip_to_key = 0;
1266  }
1267  asf_st = asf->asf_st;
1268  av_assert0(asf_st);
1269 
1270  if (!asf_st->frag_offset && asf->packet_frag_offset) {
1271  av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1272  "stream:%d, expected:%d but got %d from pkt)\n",
1273  asf->stream_index, asf_st->frag_offset,
1274  asf->packet_frag_offset);
1275  avio_skip(pb, asf->packet_frag_size);
1276  asf->packet_size_left -= asf->packet_frag_size;
1277  continue;
1278  }
1279 
1280  if (asf->packet_replic_size == 1) {
1281  // frag_offset is here used as the beginning timestamp
1283  asf->packet_time_start += asf->packet_time_delta;
1284  asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1285  asf->packet_size_left--;
1286  asf->packet_multi_size--;
1287  if (asf->packet_multi_size < asf_st->packet_obj_size) {
1288  asf->packet_time_start = 0;
1289  avio_skip(pb, asf->packet_multi_size);
1290  asf->packet_size_left -= asf->packet_multi_size;
1291  continue;
1292  }
1293  asf->packet_multi_size -= asf_st->packet_obj_size;
1294  }
1295 
1296  if (asf_st->pkt.size != asf_st->packet_obj_size ||
1297  // FIXME is this condition sufficient?
1298  asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1299  int ret;
1300 
1301  if (asf_st->pkt.data) {
1302  av_log(s, AV_LOG_INFO,
1303  "freeing incomplete packet size %d, new %d\n",
1304  asf_st->pkt.size, asf_st->packet_obj_size);
1305  asf_st->frag_offset = 0;
1306  av_packet_unref(&asf_st->pkt);
1307  }
1308  /* new packet */
1309  if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1310  return ret;
1311  asf_st->seq = asf->packet_seq;
1312  if (asf->ts_is_pts) {
1313  asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1314  } else
1315  asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1316  asf_st->pkt.stream_index = asf->stream_index;
1317  asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1318  asf_st->pkt_clean = 0;
1319 
1320  if (asf_st->pkt.data && asf_st->palette_changed) {
1321  uint8_t *pal;
1323  AVPALETTE_SIZE);
1324  if (!pal) {
1325  av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1326  } else {
1327  memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1328  asf_st->palette_changed = 0;
1329  }
1330  }
1331  av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1332  asf->stream_index, asf->packet_key_frame,
1333  asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1335  asf_st->packet_obj_size);
1337  asf->packet_key_frame = 1;
1338  if (asf->packet_key_frame)
1339  asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1340  }
1341 
1342  /* read data */
1343  av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1344  s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1345  asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1346  asf->packet_size_left -= asf->packet_frag_size;
1347  if (asf->packet_size_left < 0)
1348  continue;
1349 
1350  if (asf->packet_frag_offset >= asf_st->pkt.size ||
1351  asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1352  av_log(s, AV_LOG_ERROR,
1353  "packet fragment position invalid %u,%u not in %u\n",
1355  asf_st->pkt.size);
1356  continue;
1357  }
1358 
1359  if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1360  memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1361  asf_st->pkt_clean = 1;
1362  }
1363 
1364  ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1365  asf->packet_frag_size);
1366  if (ret != asf->packet_frag_size) {
1367  if (ret < 0 || asf->packet_frag_offset + ret == 0)
1368  return ret < 0 ? ret : AVERROR_EOF;
1369 
1370  if (asf_st->ds_span > 1) {
1371  // scrambling, we can either drop it completely or fill the remainder
1372  // TODO: should we fill the whole packet instead of just the current
1373  // fragment?
1374  memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1375  asf->packet_frag_size - ret);
1376  ret = asf->packet_frag_size;
1377  } else {
1378  // no scrambling, so we can return partial packets
1379  av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1380  }
1381  }
1382  if (s->key && s->keylen == 20)
1383  ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1384  ret);
1385  asf_st->frag_offset += ret;
1386  /* test if whole packet is read */
1387  if (asf_st->frag_offset == asf_st->pkt.size) {
1388  // workaround for macroshit radio DVR-MS files
1390  asf_st->pkt.size > 100) {
1391  int i;
1392  for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1393  ;
1394  if (i == asf_st->pkt.size) {
1395  av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1396  asf_st->frag_offset = 0;
1397  av_packet_unref(&asf_st->pkt);
1398  continue;
1399  }
1400  }
1401 
1402  /* return packet */
1403  if (asf_st->ds_span > 1) {
1404  if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1405  av_log(s, AV_LOG_ERROR,
1406  "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1407  asf_st->pkt.size, asf_st->ds_packet_size,
1408  asf_st->ds_span);
1409  } else {
1410  /* packet descrambling */
1411  AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1413  if (buf) {
1414  uint8_t *newdata = buf->data;
1415  int offset = 0;
1416  memset(newdata + asf_st->pkt.size, 0,
1418  while (offset < asf_st->pkt.size) {
1419  int off = offset / asf_st->ds_chunk_size;
1420  int row = off / asf_st->ds_span;
1421  int col = off % asf_st->ds_span;
1422  int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1423  assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1424  assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1425  memcpy(newdata + offset,
1426  asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1427  asf_st->ds_chunk_size);
1428  offset += asf_st->ds_chunk_size;
1429  }
1430  av_buffer_unref(&asf_st->pkt.buf);
1431  asf_st->pkt.buf = buf;
1432  asf_st->pkt.data = buf->data;
1433  }
1434  }
1435  }
1436  asf_st->frag_offset = 0;
1437  *pkt = asf_st->pkt;
1438  asf_st->pkt.buf = 0;
1439  asf_st->pkt.size = 0;
1440  asf_st->pkt.data = 0;
1441  asf_st->pkt.side_data_elems = 0;
1442  asf_st->pkt.side_data = NULL;
1443  break; // packet completed
1444  }
1445  }
1446  return 0;
1447 }
1448 
1450 {
1451  ASFContext *asf = s->priv_data;
1452 
1453  for (;;) {
1454  int ret;
1455 
1456  /* parse cached packets, if any */
1457  if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1458  return ret;
1459  if ((ret = asf_get_packet(s, s->pb)) < 0)
1460  assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1461  asf->packet_segments < 1);
1462  asf->packet_time_start = 0;
1463  }
1464 }
1465 
1466 // Added to support seeking after packets have been read
1467 // If information is not reset, read_packet fails due to
1468 // leftover information from previous reads
1470 {
1471  ASFContext *asf = s->priv_data;
1472  ASFStream *asf_st;
1473  int i;
1474 
1475  asf->packet_size_left = 0;
1476  asf->packet_flags = 0;
1477  asf->packet_property = 0;
1478  asf->packet_timestamp = 0;
1479  asf->packet_segsizetype = 0;
1480  asf->packet_segments = 0;
1481  asf->packet_seq = 0;
1482  asf->packet_replic_size = 0;
1483  asf->packet_key_frame = 0;
1484  asf->packet_padsize = 0;
1485  asf->packet_frag_offset = 0;
1486  asf->packet_frag_size = 0;
1487  asf->packet_frag_timestamp = 0;
1488  asf->packet_multi_size = 0;
1489  asf->packet_time_delta = 0;
1490  asf->packet_time_start = 0;
1491 
1492  for (i = 0; i < 128; i++) {
1493  asf_st = &asf->streams[i];
1494  av_packet_unref(&asf_st->pkt);
1495  asf_st->packet_obj_size = 0;
1496  asf_st->frag_offset = 0;
1497  asf_st->seq = 0;
1498  }
1499  asf->asf_st = NULL;
1500 }
1501 
1503 {
1504  ASFContext *asf = s->priv_data;
1505  int i;
1506 
1507  for (i = 0; i < 128; i++) {
1508  int j = asf->asfid2avid[i];
1509  ASFStream *asf_st = &asf->streams[i];
1510  if (j < 0 || s->streams[j]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1511  continue;
1512 
1513  asf_st->skip_to_key = 1;
1514  }
1515 }
1516 
1518 {
1519  asf_reset_header(s);
1520 
1521  return 0;
1522 }
1523 
1524 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1525  int64_t *ppos, int64_t pos_limit)
1526 {
1527  ASFContext *asf = s->priv_data;
1528  AVPacket pkt1, *pkt = &pkt1;
1529  ASFStream *asf_st;
1530  int64_t pts;
1531  int64_t pos = *ppos;
1532  int i;
1533  int64_t start_pos[ASF_MAX_STREAMS];
1534 
1535  for (i = 0; i < s->nb_streams; i++)
1536  start_pos[i] = pos;
1537 
1538  if (s->packet_size > 0)
1539  pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1540  s->packet_size * s->packet_size +
1541  s->internal->data_offset;
1542  *ppos = pos;
1543  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1544  return AV_NOPTS_VALUE;
1545 
1547  asf_reset_header(s);
1548  for (;;) {
1549  if (av_read_frame(s, pkt) < 0) {
1550  av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1551  return AV_NOPTS_VALUE;
1552  }
1553 
1554  pts = pkt->dts;
1555 
1556  if (pkt->flags & AV_PKT_FLAG_KEY) {
1557  i = pkt->stream_index;
1558 
1559  asf_st = &asf->streams[s->streams[i]->id];
1560 
1561 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1562  pos = asf_st->packet_pos;
1563  av_assert1(pkt->pos == asf_st->packet_pos);
1564 
1565  av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1566  pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1567  start_pos[i] = asf_st->packet_pos + 1;
1568 
1569  if (pkt->stream_index == stream_index) {
1570  av_packet_unref(pkt);
1571  break;
1572  }
1573  }
1574  av_packet_unref(pkt);
1575  }
1576 
1577  *ppos = pos;
1578  return pts;
1579 }
1580 
1581 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1582 {
1583  ff_asf_guid g;
1584  ASFContext *asf = s->priv_data;
1585  int64_t current_pos = avio_tell(s->pb);
1586  int64_t ret;
1587 
1588  if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1589  return ret;
1590  }
1591 
1592  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1593  goto end;
1594 
1595  /* the data object can be followed by other top-level objects,
1596  * skip them until the simple index object is reached */
1597  while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1598  int64_t gsize = avio_rl64(s->pb);
1599  if (gsize < 24 || avio_feof(s->pb)) {
1600  goto end;
1601  }
1602  avio_skip(s->pb, gsize - 24);
1603  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1604  goto end;
1605  }
1606 
1607  {
1608  int64_t itime, last_pos = -1;
1609  int pct, ict;
1610  int i;
1611  int64_t av_unused gsize = avio_rl64(s->pb);
1612  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1613  goto end;
1614  itime = avio_rl64(s->pb);
1615  pct = avio_rl32(s->pb);
1616  ict = avio_rl32(s->pb);
1617  av_log(s, AV_LOG_DEBUG,
1618  "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1619 
1620  for (i = 0; i < ict; i++) {
1621  int pktnum = avio_rl32(s->pb);
1622  int pktct = avio_rl16(s->pb);
1623  int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1624  int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1625 
1626  if (avio_feof(s->pb)) {
1627  ret = AVERROR_INVALIDDATA;
1628  goto end;
1629  }
1630 
1631  if (pos != last_pos) {
1632  av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1633  pktnum, pktct, index_pts);
1634  av_add_index_entry(s->streams[stream_index], pos, index_pts,
1635  s->packet_size, 0, AVINDEX_KEYFRAME);
1636  last_pos = pos;
1637  }
1638  }
1639  asf->index_read = ict > 1;
1640  }
1641 end:
1642 // if (avio_feof(s->pb)) {
1643 // ret = 0;
1644 // }
1645  avio_seek(s->pb, current_pos, SEEK_SET);
1646  return ret;
1647 }
1648 
1649 static int asf_read_seek(AVFormatContext *s, int stream_index,
1650  int64_t pts, int flags)
1651 {
1652  ASFContext *asf = s->priv_data;
1653  AVStream *st = s->streams[stream_index];
1654  int ret = 0;
1655 
1656  if (s->packet_size <= 0)
1657  return -1;
1658 
1659  /* Try using the protocol's read_seek if available */
1660  if (s->pb) {
1661  int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1662  if (ret >= 0)
1663  asf_reset_header(s);
1664  if (ret != AVERROR(ENOSYS))
1665  return ret;
1666  }
1667 
1668  /* explicitly handle the case of seeking to 0 */
1669  if (!pts) {
1670  asf_reset_header(s);
1671  avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1672  return 0;
1673  }
1674 
1675  if (!asf->index_read) {
1676  ret = asf_build_simple_index(s, stream_index);
1677  if (ret < 0)
1678  asf->index_read = -1;
1679  }
1680 
1681  if (asf->index_read > 0 && st->index_entries) {
1682  int index = av_index_search_timestamp(st, pts, flags);
1683  if (index >= 0) {
1684  /* find the position */
1685  uint64_t pos = st->index_entries[index].pos;
1686 
1687  /* do the seek */
1688  av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1689  if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1690  return -1;
1691  asf_reset_header(s);
1692  skip_to_key(s);
1693  return 0;
1694  }
1695  }
1696  /* no index or seeking by index failed */
1697  if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1698  return -1;
1699  asf_reset_header(s);
1700  skip_to_key(s);
1701  return 0;
1702 }
1703 
1705  .name = "asf",
1706  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1707  .priv_data_size = sizeof(ASFContext),
1708  .read_probe = asf_probe,
1713  .read_timestamp = asf_read_pts,
1715  .priv_class = &asf_class,
1716 };
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:1475
#define NULL
Definition: coverity.c:32
discard all frames except keyframes
Definition: avcodec.h:235
#define AVFMT_NOBINSEARCH
Format does not allow to fall back on binary search via read_timestamp.
Definition: avformat.h:468
Bytestream IO Context.
Definition: avio.h:161
#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:642
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:334
#define DO_2BITS(bits, var, defval)
Definition: asfdec_f.c:944
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:1502
int packet_segments
Definition: asfdec_f.c:96
if(ret< 0)
Definition: vf_mcdeint.c:279
AVOption.
Definition: opt.h:246
static int asf_read_language_list(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:676
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:2045
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:3158
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: packet.h:375
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:103
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:4938
const char * g
Definition: vf_curves.c:115
const char * desc
Definition: nvenc.c:79
int64_t pos
Definition: avformat.h:805
int num
Definition: asfdec_f.c:48
#define avpriv_request_sample(...)
int64_t data_offset
offset of the first packet
Definition: internal.h:80
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: codec_par.h:60
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:938
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:356
static int asf_read_file_properties(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:374
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1105
int skip_to_key
Definition: asfdec_f.c:56
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1804
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
static int asf_probe(const AVProbeData *pd)
Definition: asfdec_f.c:189
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
const char * key
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:398
discard all
Definition: avcodec.h:236
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 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:4647
Format I/O context.
Definition: avformat.h:1351
char str[32]
Definition: internal.h:48
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:1924
#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:243
static int64_t start_time
Definition: ffplay.c:332
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: codec_par.h:126
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:1449
#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:1094
int id
Format-specific stream ID.
Definition: avformat.h:883
ASFStream streams[128]
it&#39;s max number and it&#39;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:4519
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
int packet_size_left
Definition: asfdec_f.c:83
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1170
static void finish(void)
Definition: movenc.c:345
uint8_t * data
Definition: packet.h:355
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:49
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:304
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
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:744
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:625
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: codec_par.h:89
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
static int asf_read_metadata(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:696
#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:88
#define AVINDEX_KEYFRAME
Definition: avformat.h:812
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
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: packet.h:46
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:2162
static const AVOption options[]
Definition: asfdec_f.c:120
static int asf_build_simple_index(AVFormatContext *s, int stream_index)
Definition: asfdec_f.c:1581
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
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
#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:186
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
unsigned int pos
Definition: spdifenc.c:410
#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: codec_par.h:56
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:338
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1114
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().
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
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:623
int side_data_elems
Definition: packet.h:367
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:93
#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:123
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
Definition: asf.h:32
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
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:1517
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:131
common internal API header
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:1524
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
const char * name
Definition: qsvenc.c:46
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&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
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
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
#define s(width, name)
Definition: cbs_vp9.c:257
const ff_asf_guid ff_asf_ext_stream_embed_stream_header
Definition: asf.c:100
int packet_multi_size
Definition: asfdec_f.c:105
AVDictionary * metadata
Definition: avformat.h:940
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:1091
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:51
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
Definition: asfdec_f.c:1649
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:844
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
uint8_t ff_asf_guid[16]
Definition: riff.h:92
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
uint32_t ignore
preroll is 64 bits - but let&#39;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:1393
const ff_asf_guid ff_asf_video_stream
Definition: asf.c:53
AVInputFormat ff_asf_demuxer
Definition: asfdec_f.c:1704
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
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:469
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1130
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
double value
Definition: eval.c:98
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:245
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
Definition: asfdec_f.c:317
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1773
full parsing and repack of the first frame only, only implemented for H.264 currently ...
Definition: avformat.h:798
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
#define flags(name, subs,...)
Definition: cbs_av1.c:564
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
uint8_t type
Definition: asfdec_f.c:43
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
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:453
const uint8_t * key
Definition: avformat.h:1527
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:795
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
Main libavformat public API header.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: packet.h:366
const ff_asf_guid ff_asf_jfif_media
Definition: asf.c:57
Definition: asf.h:36
common internal and external API header
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:782
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
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.
Definition: id3v2.c:1108
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:215
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:1209
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:1379
int packet_flags
Definition: asfdec_f.c:92
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
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: packet.h:354
int stream_index
Definition: asfdec_f.c:110
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:107
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
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:80
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:1220
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:332
int stream_index
Definition: packet.h:357
Definition: asf.h:33
#define MKTAG(a, b, c, d)
Definition: common.h:406
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:931
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:118
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1133
enum AVCodecID id
This structure stores compressed data.
Definition: packet.h:332
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:755
#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:969
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: packet.h:348
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:958
static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:565
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:2177
#define av_unused
Definition: attributes.h:131
static void asf_reset_header(AVFormatContext *s)
Definition: asfdec_f.c:1469