FFmpeg  4.1.11
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(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  FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size)/20)
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  if (size < sizeX - 40 || sizeX - 40 > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
520  return AVERROR_INVALIDDATA;
521  st->codecpar->extradata_size = ffio_limit(pb, sizeX - 40);
524  if (!st->codecpar->extradata)
525  return AVERROR(ENOMEM);
527  }
528 
529  /* Extract palette from extradata if bpp <= 8 */
530  /* This code assumes that extradata contains only palette */
531  /* This is true for all paletted codecs implemented in libavcodec */
532  if (st->codecpar->extradata_size && (st->codecpar->bits_per_coded_sample <= 8)) {
533 #if HAVE_BIGENDIAN
534  int i;
535  for (i = 0; i < FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE) / 4; i++)
536  asf_st->palette[i] = av_bswap32(((uint32_t *)st->codecpar->extradata)[i]);
537 #else
538  memcpy(asf_st->palette, st->codecpar->extradata,
540 #endif
541  asf_st->palette_changed = 1;
542  }
543 
544  st->codecpar->codec_tag = tag1;
546  if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
548  /* issue658 contains wrong w/h and MS even puts a fake seq header
549  * with wrong w/h in extradata while a correct one is in the stream.
550  * maximum lameness */
551  st->codecpar->width =
552  st->codecpar->height = 0;
553  av_freep(&st->codecpar->extradata);
554  st->codecpar->extradata_size = 0;
555  }
556  if (st->codecpar->codec_id == AV_CODEC_ID_H264)
558  if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4)
560  }
561  pos2 = avio_tell(pb);
562  avio_skip(pb, size - (pos2 - pos1 + 24));
563 
564  return 0;
565 }
566 
568 {
569  ASFContext *asf = s->priv_data;
570  AVIOContext *pb = s->pb;
571  ff_asf_guid g;
572  int ext_len, payload_ext_ct, stream_ct, i;
573  uint32_t leak_rate, stream_num;
574  unsigned int stream_languageid_index;
575 
576  avio_rl64(pb); // starttime
577  avio_rl64(pb); // endtime
578  leak_rate = avio_rl32(pb); // leak-datarate
579  avio_rl32(pb); // bucket-datasize
580  avio_rl32(pb); // init-bucket-fullness
581  avio_rl32(pb); // alt-leak-datarate
582  avio_rl32(pb); // alt-bucket-datasize
583  avio_rl32(pb); // alt-init-bucket-fullness
584  avio_rl32(pb); // max-object-size
585  avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
586  stream_num = avio_rl16(pb); // stream-num
587 
588  stream_languageid_index = avio_rl16(pb); // stream-language-id-index
589  if (stream_num < 128)
590  asf->streams[stream_num].stream_language_index = stream_languageid_index;
591 
592  avio_rl64(pb); // avg frametime in 100ns units
593  stream_ct = avio_rl16(pb); // stream-name-count
594  payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
595 
596  if (stream_num < 128) {
597  asf->stream_bitrates[stream_num] = leak_rate;
598  asf->streams[stream_num].payload_ext_ct = 0;
599  }
600 
601  for (i = 0; i < stream_ct; i++) {
602  avio_rl16(pb);
603  ext_len = avio_rl16(pb);
604  avio_skip(pb, ext_len);
605  }
606 
607  for (i = 0; i < payload_ext_ct; i++) {
608  int size;
609  ff_get_guid(pb, &g);
610  size = avio_rl16(pb);
611  ext_len = avio_rl32(pb);
612  if (ext_len < 0)
613  return AVERROR_INVALIDDATA;
614  avio_skip(pb, ext_len);
615  if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
616  ASFPayload *p = &asf->streams[stream_num].payload[i];
617  p->type = g[0];
618  p->size = size;
619  av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
620  asf->streams[stream_num].payload_ext_ct ++;
621  }
622  }
623 
624  return 0;
625 }
626 
628 {
629  AVIOContext *pb = s->pb;
630  int len1, len2, len3, len4, len5;
631 
632  len1 = avio_rl16(pb);
633  len2 = avio_rl16(pb);
634  len3 = avio_rl16(pb);
635  len4 = avio_rl16(pb);
636  len5 = avio_rl16(pb);
637  get_tag(s, "title", 0, len1, 32);
638  get_tag(s, "author", 0, len2, 32);
639  get_tag(s, "copyright", 0, len3, 32);
640  get_tag(s, "comment", 0, len4, 32);
641  avio_skip(pb, len5);
642 
643  return 0;
644 }
645 
647 {
648  AVIOContext *pb = s->pb;
649  ASFContext *asf = s->priv_data;
650  int desc_count, i, ret;
651 
652  desc_count = avio_rl16(pb);
653  for (i = 0; i < desc_count; i++) {
654  int name_len, value_type, value_len;
655  char name[1024];
656 
657  name_len = avio_rl16(pb);
658  if (name_len % 2) // must be even, broken lavf versions wrote len-1
659  name_len += 1;
660  if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
661  avio_skip(pb, name_len - ret);
662  value_type = avio_rl16(pb);
663  value_len = avio_rl16(pb);
664  if (!value_type && value_len % 2)
665  value_len += 1;
666  /* My sample has that stream set to 0 maybe that mean the container.
667  * ASF stream count starts at 1. I am using 0 to the container value
668  * since it's unused. */
669  if (!strcmp(name, "AspectRatioX"))
670  asf->dar[0].num = get_value(s->pb, value_type, 32);
671  else if (!strcmp(name, "AspectRatioY"))
672  asf->dar[0].den = get_value(s->pb, value_type, 32);
673  else
674  get_tag(s, name, value_type, value_len, 32);
675  }
676 
677  return 0;
678 }
679 
681 {
682  AVIOContext *pb = s->pb;
683  ASFContext *asf = s->priv_data;
684  int j, ret;
685  int stream_count = avio_rl16(pb);
686  for (j = 0; j < stream_count; j++) {
687  char lang[6];
688  unsigned int lang_len = avio_r8(pb);
689  if ((ret = avio_get_str16le(pb, lang_len, lang,
690  sizeof(lang))) < lang_len)
691  avio_skip(pb, lang_len - ret);
692  if (j < 128)
693  av_strlcpy(asf->stream_languages[j], lang,
694  sizeof(*asf->stream_languages));
695  }
696 
697  return 0;
698 }
699 
701 {
702  AVIOContext *pb = s->pb;
703  ASFContext *asf = s->priv_data;
704  int n, stream_num, name_len_utf16, name_len_utf8, value_len;
705  int ret, i;
706  n = avio_rl16(pb);
707 
708  for (i = 0; i < n; i++) {
709  uint8_t *name;
710  int value_type;
711 
712  avio_rl16(pb); // lang_list_index
713  stream_num = avio_rl16(pb);
714  name_len_utf16 = avio_rl16(pb);
715  value_type = avio_rl16(pb); /* value_type */
716  value_len = avio_rl32(pb);
717 
718  if (value_len < 0 || value_len > UINT16_MAX)
719  return AVERROR_INVALIDDATA;
720 
721  name_len_utf8 = 2*name_len_utf16 + 1;
722  name = av_malloc(name_len_utf8);
723  if (!name)
724  return AVERROR(ENOMEM);
725 
726  if ((ret = avio_get_str16le(pb, name_len_utf16, name, name_len_utf8)) < name_len_utf16)
727  avio_skip(pb, name_len_utf16 - ret);
728  av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
729  i, stream_num, name_len_utf16, value_type, value_len, name);
730 
731  if (!strcmp(name, "AspectRatioX")){
732  int aspect_x = get_value(s->pb, value_type, 16);
733  if(stream_num < 128)
734  asf->dar[stream_num].num = aspect_x;
735  } else if(!strcmp(name, "AspectRatioY")){
736  int aspect_y = get_value(s->pb, value_type, 16);
737  if(stream_num < 128)
738  asf->dar[stream_num].den = aspect_y;
739  } else {
740  get_tag(s, name, value_type, value_len, 16);
741  }
742  av_freep(&name);
743  }
744 
745  return 0;
746 }
747 
748 static int asf_read_marker(AVFormatContext *s, int64_t size)
749 {
750  AVIOContext *pb = s->pb;
751  ASFContext *asf = s->priv_data;
752  int i, count, name_len, ret;
753  char name[1024];
754 
755  avio_rl64(pb); // reserved 16 bytes
756  avio_rl64(pb); // ...
757  count = avio_rl32(pb); // markers count
758  avio_rl16(pb); // reserved 2 bytes
759  name_len = avio_rl16(pb); // name length
760  avio_skip(pb, name_len);
761 
762  for (i = 0; i < count; i++) {
763  int64_t pres_time;
764  int name_len;
765 
766  if (avio_feof(pb))
767  return AVERROR_INVALIDDATA;
768 
769  avio_rl64(pb); // offset, 8 bytes
770  pres_time = avio_rl64(pb); // presentation time
771  pres_time -= asf->hdr.preroll * 10000;
772  avio_rl16(pb); // entry length
773  avio_rl32(pb); // send time
774  avio_rl32(pb); // flags
775  name_len = avio_rl32(pb); // name length
776  if ((unsigned)name_len > INT_MAX / 2)
777  return AVERROR_INVALIDDATA;
778  if ((ret = avio_get_str16le(pb, name_len * 2, name,
779  sizeof(name))) < name_len)
780  avio_skip(pb, name_len - ret);
781  avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
783  }
784 
785  return 0;
786 }
787 
789 {
790  ASFContext *asf = s->priv_data;
791  ff_asf_guid g;
792  AVIOContext *pb = s->pb;
793  int i;
794  int64_t gsize;
795 
796  ff_get_guid(pb, &g);
797  if (ff_guidcmp(&g, &ff_asf_header))
798  return AVERROR_INVALIDDATA;
799  avio_rl64(pb);
800  avio_rl32(pb);
801  avio_r8(pb);
802  avio_r8(pb);
803  memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
804 
805  for (i = 0; i<128; i++)
806  asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
807 
808  for (;;) {
809  uint64_t gpos = avio_tell(pb);
810  int ret = 0;
811  ff_get_guid(pb, &g);
812  gsize = avio_rl64(pb);
813  print_guid(&g);
814  if (!ff_guidcmp(&g, &ff_asf_data_header)) {
815  asf->data_object_offset = avio_tell(pb);
816  /* If not streaming, gsize is not unlimited (how?),
817  * and there is enough space in the file.. */
818  if (!(asf->hdr.flags & 0x01) && gsize >= 100)
819  asf->data_object_size = gsize - 24;
820  else
821  asf->data_object_size = (uint64_t)-1;
822  break;
823  }
824  if (gsize < 24)
825  return AVERROR_INVALIDDATA;
826  if (!ff_guidcmp(&g, &ff_asf_file_header)) {
827  ret = asf_read_file_properties(s, gsize);
828  } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
829  ret = asf_read_stream_properties(s, gsize);
830  } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
831  asf_read_content_desc(s, gsize);
832  } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
833  asf_read_language_list(s, gsize);
834  } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
835  asf_read_ext_content_desc(s, gsize);
836  } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
837  asf_read_metadata(s, gsize);
838  } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
839  asf_read_metadata(s, gsize);
840  } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
842 
843  // there could be an optional stream properties object to follow
844  // if so the next iteration will pick it up
845  continue;
846  } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
847  ff_get_guid(pb, &g);
848  avio_skip(pb, 6);
849  continue;
850  } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
851  asf_read_marker(s, gsize);
852  } else if (avio_feof(pb)) {
853  return AVERROR_EOF;
854  } else {
855  if (!s->keylen) {
857  unsigned int len;
858  AVPacket pkt;
860  "DRM protected stream detected, decoding will likely fail!\n");
861  len= avio_rl32(pb);
862  av_log(s, AV_LOG_DEBUG, "Secret data:\n");
863 
864  if ((ret = av_get_packet(pb, &pkt, len)) < 0)
865  return ret;
866  av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
867  av_packet_unref(&pkt);
868 
869  len= avio_rl32(pb);
870  if (len > UINT16_MAX)
871  return AVERROR_INVALIDDATA;
872  get_tag(s, "ASF_Protection_Type", -1, len, 32);
873 
874  len= avio_rl32(pb);
875  if (len > UINT16_MAX)
876  return AVERROR_INVALIDDATA;
877  get_tag(s, "ASF_Key_ID", -1, len, 32);
878 
879  len= avio_rl32(pb);
880  if (len > UINT16_MAX)
881  return AVERROR_INVALIDDATA;
882  get_tag(s, "ASF_License_URL", -1, len, 32);
883  } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
885  "Ext DRM protected stream detected, decoding will likely fail!\n");
886  av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
887  } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
888  av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
889  }
890  }
891  }
892  if (ret < 0)
893  return ret;
894 
895  if (avio_tell(pb) != gpos + gsize)
896  av_log(s, AV_LOG_DEBUG,
897  "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
898  avio_tell(pb) - gpos, gsize);
899  avio_seek(pb, gpos + gsize, SEEK_SET);
900  }
901  ff_get_guid(pb, &g);
902  avio_rl64(pb);
903  avio_r8(pb);
904  avio_r8(pb);
905  if (avio_feof(pb))
906  return AVERROR_EOF;
907  asf->data_offset = avio_tell(pb);
908  asf->packet_size_left = 0;
909 
910  for (i = 0; i < 128; i++) {
911  int stream_num = asf->asfid2avid[i];
912  if (stream_num >= 0) {
913  AVStream *st = s->streams[stream_num];
914  if (!st->codecpar->bit_rate)
915  st->codecpar->bit_rate = asf->stream_bitrates[i];
916  if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
919  asf->dar[i].num, asf->dar[i].den, INT_MAX);
920  } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
921  // Use ASF container value if the stream doesn't set AR.
925  asf->dar[0].num, asf->dar[0].den, INT_MAX);
926 
927  av_log(s, AV_LOG_TRACE, "i=%d, st->codecpar->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
928  i, st->codecpar->codec_type, asf->dar[i].num, asf->dar[i].den,
930 
931  // copy and convert language codes to the frontend
932  if (asf->streams[i].stream_language_index < 128) {
933  const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
934  if (rfc1766 && strlen(rfc1766) > 1) {
935  const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
936  const char *iso6392 = ff_convert_lang_to(primary_tag,
938  if (iso6392)
939  av_dict_set(&st->metadata, "language", iso6392, 0);
940  }
941  }
942  }
943  }
944 
946 
947  return 0;
948 }
949 
950 #define DO_2BITS(bits, var, defval) \
951  switch (bits & 3) { \
952  case 3: \
953  var = avio_rl32(pb); \
954  rsize += 4; \
955  break; \
956  case 2: \
957  var = avio_rl16(pb); \
958  rsize += 2; \
959  break; \
960  case 1: \
961  var = avio_r8(pb); \
962  rsize++; \
963  break; \
964  default: \
965  var = defval; \
966  break; \
967  }
968 
969 /**
970  * Load a single ASF packet into the demuxer.
971  * @param s demux context
972  * @param pb context to read data from
973  * @return 0 on success, <0 on error
974  */
976 {
977  ASFContext *asf = s->priv_data;
978  uint32_t packet_length, padsize;
979  int rsize = 8;
980  int c, d, e, off;
981 
982  if (asf->uses_std_ecc > 0) {
983  // if we do not know packet size, allow skipping up to 32 kB
984  off = 32768;
985  if (asf->no_resync_search)
986  off = 3;
987 // else if (s->packet_size > 0 && !asf->uses_std_ecc)
988 // off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
989 
990  c = d = e = -1;
991  while (off-- > 0) {
992  c = d;
993  d = e;
994  e = avio_r8(pb);
995  if (c == 0x82 && !d && !e)
996  break;
997  }
998 
999  if (c != 0x82) {
1000  /* This code allows handling of -EAGAIN at packet boundaries (i.e.
1001  * if the packet sync code above triggers -EAGAIN). This does not
1002  * imply complete -EAGAIN handling support at random positions in
1003  * the stream. */
1004  if (pb->error == AVERROR(EAGAIN))
1005  return AVERROR(EAGAIN);
1006  if (!avio_feof(pb))
1007  av_log(s, AV_LOG_ERROR,
1008  "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
1009  }
1010  if ((c & 0x8f) == 0x82) {
1011  if (d || e) {
1012  if (!avio_feof(pb))
1013  av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
1014  return AVERROR_INVALIDDATA;
1015  }
1016  c = avio_r8(pb);
1017  d = avio_r8(pb);
1018  rsize += 3;
1019  } else if(!avio_feof(pb)) {
1020  avio_seek(pb, -1, SEEK_CUR); // FIXME
1021  }
1022  } else {
1023  c = avio_r8(pb);
1024  if (c & 0x80) {
1025  rsize ++;
1026  if (!(c & 0x60)) {
1027  d = avio_r8(pb);
1028  e = avio_r8(pb);
1029  avio_seek(pb, (c & 0xF) - 2, SEEK_CUR);
1030  rsize += c & 0xF;
1031  }
1032 
1033  if (c != 0x82)
1034  avpriv_request_sample(s, "Invalid ECC byte");
1035 
1036  if (!asf->uses_std_ecc)
1037  asf->uses_std_ecc = (c == 0x82 && !d && !e) ? 1 : -1;
1038 
1039  c = avio_r8(pb);
1040  } else
1041  asf->uses_std_ecc = -1;
1042  d = avio_r8(pb);
1043  }
1044 
1045  asf->packet_flags = c;
1046  asf->packet_property = d;
1047 
1048  DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
1049  DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1050  DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1051 
1052  // the following checks prevent overflows and infinite loops
1053  if (!packet_length || packet_length >= (1U << 29)) {
1054  av_log(s, AV_LOG_ERROR,
1055  "invalid packet_length %"PRIu32" at:%"PRId64"\n",
1056  packet_length, avio_tell(pb));
1057  return AVERROR_INVALIDDATA;
1058  }
1059  if (padsize >= packet_length) {
1060  av_log(s, AV_LOG_ERROR,
1061  "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
1062  return AVERROR_INVALIDDATA;
1063  }
1064 
1065  asf->packet_timestamp = avio_rl32(pb);
1066  avio_rl16(pb); /* duration */
1067  // rsize has at least 11 bytes which have to be present
1068 
1069  if (asf->packet_flags & 0x01) {
1070  asf->packet_segsizetype = avio_r8(pb);
1071  rsize++;
1072  asf->packet_segments = asf->packet_segsizetype & 0x3f;
1073  } else {
1074  asf->packet_segments = 1;
1075  asf->packet_segsizetype = 0x80;
1076  }
1077  if (rsize > packet_length - padsize) {
1078  asf->packet_size_left = 0;
1079  av_log(s, AV_LOG_ERROR,
1080  "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
1081  rsize, packet_length, padsize, avio_tell(pb));
1082  return AVERROR_INVALIDDATA;
1083  }
1084  asf->packet_size_left = packet_length - padsize - rsize;
1085  if (packet_length < asf->hdr.min_pktsize)
1086  padsize += asf->hdr.min_pktsize - packet_length;
1087  asf->packet_padsize = padsize;
1088  av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
1090  return 0;
1091 }
1092 
1093 /**
1094  *
1095  * @return <0 if error
1096  */
1098 {
1099  ASFContext *asf = s->priv_data;
1100  ASFStream *asfst;
1101  int rsize = 1;
1102  int num = avio_r8(pb);
1103  int i;
1104  int64_t ts0, ts1 av_unused;
1105 
1106  asf->packet_segments--;
1107  asf->packet_key_frame = num >> 7;
1108  asf->stream_index = asf->asfid2avid[num & 0x7f];
1109  asfst = &asf->streams[num & 0x7f];
1110  // sequence should be ignored!
1111  DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1112  DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1114  av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d num:%X packet_property %X\n",
1115  asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1116  asf->packet_frag_offset, asf->packet_replic_size, num, asf->packet_property);
1117  if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1118  av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1119  return AVERROR_INVALIDDATA;
1120  }
1121  if (asf->packet_replic_size >= 8) {
1122  int64_t end = avio_tell(pb) + asf->packet_replic_size;
1123  AVRational aspect;
1124  asfst->packet_obj_size = avio_rl32(pb);
1125  if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1126  av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1127  asfst->packet_obj_size = 0;
1128  return AVERROR_INVALIDDATA;
1129  }
1130  asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1131 
1132  for (i = 0; i < asfst->payload_ext_ct; i++) {
1133  ASFPayload *p = &asfst->payload[i];
1134  int size = p->size;
1135  int64_t payend;
1136  if (size == 0xFFFF)
1137  size = avio_rl16(pb);
1138  payend = avio_tell(pb) + size;
1139  if (payend > end) {
1140  av_log(s, AV_LOG_ERROR, "too long payload\n");
1141  break;
1142  }
1143  switch (p->type) {
1144  case 0x50:
1145 // duration = avio_rl16(pb);
1146  break;
1147  case 0x54:
1148  aspect.num = avio_r8(pb);
1149  aspect.den = avio_r8(pb);
1150  if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1151  s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1152  }
1153  break;
1154  case 0x2A:
1155  avio_skip(pb, 8);
1156  ts0 = avio_rl64(pb);
1157  ts1 = avio_rl64(pb);
1158  if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1160  asf->ts_is_pts = 1;
1161  break;
1162  case 0x5B:
1163  case 0xB7:
1164  case 0xCC:
1165  case 0xC0:
1166  case 0xA0:
1167  //unknown
1168  break;
1169  }
1170  avio_seek(pb, payend, SEEK_SET);
1171  }
1172 
1173  avio_seek(pb, end, SEEK_SET);
1174  rsize += asf->packet_replic_size; // FIXME - check validity
1175  } else if (asf->packet_replic_size == 1) {
1176  // multipacket - frag_offset is beginning timestamp
1178  asf->packet_frag_offset = 0;
1180 
1181  asf->packet_time_delta = avio_r8(pb);
1182  rsize++;
1183  } else if (asf->packet_replic_size != 0) {
1184  av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1185  asf->packet_replic_size);
1186  return AVERROR_INVALIDDATA;
1187  }
1188  if (asf->packet_flags & 0x01) {
1189  DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1190  if (rsize > asf->packet_size_left) {
1191  av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1192  return AVERROR_INVALIDDATA;
1193  } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1194  if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1195  av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d>%d-%d+%d)\n",
1196  asf->packet_frag_size, asf->packet_size_left, rsize, asf->packet_padsize);
1197  return AVERROR_INVALIDDATA;
1198  } else {
1199  int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1200  asf->packet_size_left += diff;
1201  asf->packet_padsize -= diff;
1202  }
1203  }
1204  } else {
1205  asf->packet_frag_size = asf->packet_size_left - rsize;
1206  }
1207  if (asf->packet_replic_size == 1) {
1208  asf->packet_multi_size = asf->packet_frag_size;
1209  if (asf->packet_multi_size > asf->packet_size_left)
1210  return AVERROR_INVALIDDATA;
1211  }
1212  asf->packet_size_left -= rsize;
1213 
1214  return 0;
1215 }
1216 
1217 /**
1218  * Parse data from individual ASF packets (which were previously loaded
1219  * with asf_get_packet()).
1220  * @param s demux context
1221  * @param pb context to read data from
1222  * @param pkt pointer to store packet data into
1223  * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1224  * packets need to be loaded (through asf_get_packet())
1225  */
1227 {
1228  ASFContext *asf = s->priv_data;
1229  ASFStream *asf_st = 0;
1230  for (;;) {
1231  int ret;
1232  if (avio_feof(pb))
1233  return AVERROR_EOF;
1234  if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1235  asf->packet_segments < 1 && asf->packet_time_start == 0) {
1236  int ret = asf->packet_size_left + asf->packet_padsize;
1237 
1239  av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1240 
1241  assert(ret >= 0);
1242  /* fail safe */
1243  avio_skip(pb, ret);
1244 
1245  asf->packet_pos = avio_tell(pb);
1246  if (asf->data_object_size != (uint64_t)-1 &&
1247  (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1248  return AVERROR_EOF; /* Do not exceed the size of the data object */
1249  return 1;
1250  }
1251  if (asf->packet_time_start == 0) {
1252  if (asf_read_frame_header(s, pb) < 0) {
1253  asf->packet_time_start = asf->packet_segments = 0;
1254  continue;
1255  }
1256  if (asf->stream_index < 0 ||
1257  s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1258  (!asf->packet_key_frame &&
1259  (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1260  asf->packet_time_start = 0;
1261  /* unhandled packet (should not happen) */
1262  avio_skip(pb, asf->packet_frag_size);
1263  asf->packet_size_left -= asf->packet_frag_size;
1264  if (asf->stream_index < 0)
1265  av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1266  asf->packet_frag_size);
1267  continue;
1268  }
1269  asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1270  if (!asf->packet_frag_offset)
1271  asf->asf_st->skip_to_key = 0;
1272  }
1273  asf_st = asf->asf_st;
1274  av_assert0(asf_st);
1275 
1276  if (!asf_st->frag_offset && asf->packet_frag_offset) {
1277  av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1278  "stream:%d, expected:%d but got %d from pkt)\n",
1279  asf->stream_index, asf_st->frag_offset,
1280  asf->packet_frag_offset);
1281  avio_skip(pb, asf->packet_frag_size);
1282  asf->packet_size_left -= asf->packet_frag_size;
1283  continue;
1284  }
1285 
1286  if (asf->packet_replic_size == 1) {
1287  // frag_offset is here used as the beginning timestamp
1289  asf->packet_time_start += asf->packet_time_delta;
1290  asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1291  asf->packet_size_left--;
1292  asf->packet_multi_size--;
1293  if (asf->packet_multi_size < asf_st->packet_obj_size) {
1294  asf->packet_time_start = 0;
1295  avio_skip(pb, asf->packet_multi_size);
1296  asf->packet_size_left -= asf->packet_multi_size;
1297  continue;
1298  }
1299  asf->packet_multi_size -= asf_st->packet_obj_size;
1300  }
1301 
1302  if (asf_st->pkt.size != asf_st->packet_obj_size ||
1303  // FIXME is this condition sufficient?
1304  asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1305  int ret;
1306 
1307  if (asf_st->pkt.data) {
1308  av_log(s, AV_LOG_INFO,
1309  "freeing incomplete packet size %d, new %d\n",
1310  asf_st->pkt.size, asf_st->packet_obj_size);
1311  asf_st->frag_offset = 0;
1312  av_packet_unref(&asf_st->pkt);
1313  }
1314  /* new packet */
1315  if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1316  return ret;
1317  asf_st->seq = asf->packet_seq;
1318  if (asf->packet_frag_timestamp != AV_NOPTS_VALUE) {
1319  if (asf->ts_is_pts) {
1320  asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1321  } else
1322  asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1323  }
1324  asf_st->pkt.stream_index = asf->stream_index;
1325  asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1326  asf_st->pkt_clean = 0;
1327 
1328  if (asf_st->pkt.data && asf_st->palette_changed) {
1329  uint8_t *pal;
1331  AVPALETTE_SIZE);
1332  if (!pal) {
1333  av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1334  } else {
1335  memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1336  asf_st->palette_changed = 0;
1337  }
1338  }
1339  av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1340  asf->stream_index, asf->packet_key_frame,
1341  asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1343  asf_st->packet_obj_size);
1345  asf->packet_key_frame = 1;
1346  if (asf->packet_key_frame)
1347  asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1348  }
1349 
1350  /* read data */
1351  av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1352  s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1353  asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1354  asf->packet_size_left -= asf->packet_frag_size;
1355  if (asf->packet_size_left < 0)
1356  continue;
1357 
1358  if (asf->packet_frag_offset >= asf_st->pkt.size ||
1359  asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1360  av_log(s, AV_LOG_ERROR,
1361  "packet fragment position invalid %u,%u not in %u\n",
1363  asf_st->pkt.size);
1364  continue;
1365  }
1366 
1367  if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1368  memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1369  asf_st->pkt_clean = 1;
1370  }
1371 
1372  ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1373  asf->packet_frag_size);
1374  if (ret != asf->packet_frag_size) {
1375  if (ret < 0 || asf->packet_frag_offset + ret == 0)
1376  return ret < 0 ? ret : AVERROR_EOF;
1377 
1378  if (asf_st->ds_span > 1) {
1379  // scrambling, we can either drop it completely or fill the remainder
1380  // TODO: should we fill the whole packet instead of just the current
1381  // fragment?
1382  memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1383  asf->packet_frag_size - ret);
1384  ret = asf->packet_frag_size;
1385  } else {
1386  // no scrambling, so we can return partial packets
1387  av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1388  }
1389  }
1390  if (s->key && s->keylen == 20)
1391  ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1392  ret);
1393  asf_st->frag_offset += ret;
1394  /* test if whole packet is read */
1395  if (asf_st->frag_offset == asf_st->pkt.size) {
1396  // workaround for macroshit radio DVR-MS files
1398  asf_st->pkt.size > 100) {
1399  int i;
1400  for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1401  ;
1402  if (i == asf_st->pkt.size) {
1403  av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1404  asf_st->frag_offset = 0;
1405  av_packet_unref(&asf_st->pkt);
1406  continue;
1407  }
1408  }
1409 
1410  /* return packet */
1411  if (asf_st->ds_span > 1) {
1412  if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1413  av_log(s, AV_LOG_ERROR,
1414  "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1415  asf_st->pkt.size, asf_st->ds_packet_size,
1416  asf_st->ds_span);
1417  } else {
1418  /* packet descrambling */
1419  AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1421  if (buf) {
1422  uint8_t *newdata = buf->data;
1423  int offset = 0;
1424  memset(newdata + asf_st->pkt.size, 0,
1426  while (offset < asf_st->pkt.size) {
1427  int off = offset / asf_st->ds_chunk_size;
1428  int row = off / asf_st->ds_span;
1429  int col = off % asf_st->ds_span;
1430  int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1431  assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1432  assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1433  memcpy(newdata + offset,
1434  asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1435  asf_st->ds_chunk_size);
1436  offset += asf_st->ds_chunk_size;
1437  }
1438  av_buffer_unref(&asf_st->pkt.buf);
1439  asf_st->pkt.buf = buf;
1440  asf_st->pkt.data = buf->data;
1441  }
1442  }
1443  }
1444  asf_st->frag_offset = 0;
1445  *pkt = asf_st->pkt;
1446  asf_st->pkt.buf = 0;
1447  asf_st->pkt.size = 0;
1448  asf_st->pkt.data = 0;
1449  asf_st->pkt.side_data_elems = 0;
1450  asf_st->pkt.side_data = NULL;
1451  break; // packet completed
1452  }
1453  }
1454  return 0;
1455 }
1456 
1458 {
1459  ASFContext *asf = s->priv_data;
1460 
1461  for (;;) {
1462  int ret;
1463 
1464  /* parse cached packets, if any */
1465  if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1466  return ret;
1467  if ((ret = asf_get_packet(s, s->pb)) < 0)
1468  assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1469  asf->packet_segments < 1);
1470  asf->packet_time_start = 0;
1471  }
1472 }
1473 
1474 // Added to support seeking after packets have been read
1475 // If information is not reset, read_packet fails due to
1476 // leftover information from previous reads
1478 {
1479  ASFContext *asf = s->priv_data;
1480  ASFStream *asf_st;
1481  int i;
1482 
1483  asf->packet_size_left = 0;
1484  asf->packet_flags = 0;
1485  asf->packet_property = 0;
1486  asf->packet_timestamp = 0;
1487  asf->packet_segsizetype = 0;
1488  asf->packet_segments = 0;
1489  asf->packet_seq = 0;
1490  asf->packet_replic_size = 0;
1491  asf->packet_key_frame = 0;
1492  asf->packet_padsize = 0;
1493  asf->packet_frag_offset = 0;
1494  asf->packet_frag_size = 0;
1495  asf->packet_frag_timestamp = 0;
1496  asf->packet_multi_size = 0;
1497  asf->packet_time_delta = 0;
1498  asf->packet_time_start = 0;
1499 
1500  for (i = 0; i < 128; i++) {
1501  asf_st = &asf->streams[i];
1502  av_packet_unref(&asf_st->pkt);
1503  asf_st->packet_obj_size = 0;
1504  asf_st->frag_offset = 0;
1505  asf_st->seq = 0;
1506  }
1507  asf->asf_st = NULL;
1508 }
1509 
1511 {
1512  ASFContext *asf = s->priv_data;
1513  int i;
1514 
1515  for (i = 0; i < 128; i++) {
1516  int j = asf->asfid2avid[i];
1517  ASFStream *asf_st = &asf->streams[i];
1518  if (j < 0 || s->streams[j]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1519  continue;
1520 
1521  asf_st->skip_to_key = 1;
1522  }
1523 }
1524 
1526 {
1527  asf_reset_header(s);
1528 
1529  return 0;
1530 }
1531 
1532 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1533  int64_t *ppos, int64_t pos_limit)
1534 {
1535  ASFContext *asf = s->priv_data;
1536  AVPacket pkt1, *pkt = &pkt1;
1537  ASFStream *asf_st;
1538  int64_t pts;
1539  int64_t pos = *ppos;
1540  int i;
1541  int64_t start_pos[ASF_MAX_STREAMS];
1542 
1543  for (i = 0; i < s->nb_streams; i++)
1544  start_pos[i] = pos;
1545 
1546  if (s->packet_size > 0)
1547  pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1548  s->packet_size * s->packet_size +
1549  s->internal->data_offset;
1550  *ppos = pos;
1551  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1552  return AV_NOPTS_VALUE;
1553 
1555  asf_reset_header(s);
1556  for (;;) {
1557  if (av_read_frame(s, pkt) < 0) {
1558  av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1559  return AV_NOPTS_VALUE;
1560  }
1561 
1562  pts = pkt->dts;
1563 
1564  if (pkt->flags & AV_PKT_FLAG_KEY) {
1565  i = pkt->stream_index;
1566 
1567  asf_st = &asf->streams[s->streams[i]->id];
1568 
1569 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1570  pos = asf_st->packet_pos;
1571  av_assert1(pkt->pos == asf_st->packet_pos);
1572 
1573  av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1574  pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1575  start_pos[i] = asf_st->packet_pos + 1;
1576 
1577  if (pkt->stream_index == stream_index) {
1578  av_packet_unref(pkt);
1579  break;
1580  }
1581  }
1582  av_packet_unref(pkt);
1583  }
1584 
1585  *ppos = pos;
1586  return pts;
1587 }
1588 
1589 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1590 {
1591  ff_asf_guid g;
1592  ASFContext *asf = s->priv_data;
1593  int64_t current_pos = avio_tell(s->pb);
1594  int64_t ret;
1595 
1596  if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1597  return ret;
1598  }
1599 
1600  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1601  goto end;
1602 
1603  /* the data object can be followed by other top-level objects,
1604  * skip them until the simple index object is reached */
1605  while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1606  int64_t gsize = avio_rl64(s->pb);
1607  if (gsize < 24 || avio_feof(s->pb)) {
1608  goto end;
1609  }
1610  avio_skip(s->pb, gsize - 24);
1611  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1612  goto end;
1613  }
1614 
1615  {
1616  int64_t itime, last_pos = -1;
1617  int pct, ict;
1618  int i;
1619  int64_t av_unused gsize = avio_rl64(s->pb);
1620  if ((ret = ff_get_guid(s->pb, &g)) < 0)
1621  goto end;
1622  itime = avio_rl64(s->pb);
1623  pct = avio_rl32(s->pb);
1624  ict = avio_rl32(s->pb);
1625  av_log(s, AV_LOG_DEBUG,
1626  "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1627 
1628  for (i = 0; i < ict; i++) {
1629  int pktnum = avio_rl32(s->pb);
1630  int pktct = avio_rl16(s->pb);
1631  int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1632  int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1633 
1634  if (avio_feof(s->pb)) {
1635  ret = AVERROR_INVALIDDATA;
1636  goto end;
1637  }
1638 
1639  if (pos != last_pos) {
1640  av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1641  pktnum, pktct, index_pts);
1642  av_add_index_entry(s->streams[stream_index], pos, index_pts,
1643  s->packet_size, 0, AVINDEX_KEYFRAME);
1644  last_pos = pos;
1645  }
1646  }
1647  asf->index_read = ict > 1;
1648  }
1649 end:
1650 // if (avio_feof(s->pb)) {
1651 // ret = 0;
1652 // }
1653  avio_seek(s->pb, current_pos, SEEK_SET);
1654  return ret;
1655 }
1656 
1657 static int asf_read_seek(AVFormatContext *s, int stream_index,
1658  int64_t pts, int flags)
1659 {
1660  ASFContext *asf = s->priv_data;
1661  AVStream *st = s->streams[stream_index];
1662  int ret = 0;
1663 
1664  if (s->packet_size <= 0)
1665  return -1;
1666 
1667  /* Try using the protocol's read_seek if available */
1668  if (s->pb) {
1669  int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1670  if (ret >= 0)
1671  asf_reset_header(s);
1672  if (ret != AVERROR(ENOSYS))
1673  return ret;
1674  }
1675 
1676  /* explicitly handle the case of seeking to 0 */
1677  if (!pts) {
1678  asf_reset_header(s);
1679  avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1680  return 0;
1681  }
1682 
1683  if (!asf->index_read) {
1684  ret = asf_build_simple_index(s, stream_index);
1685  if (ret < 0)
1686  asf->index_read = -1;
1687  }
1688 
1689  if (asf->index_read > 0 && st->index_entries) {
1690  int index = av_index_search_timestamp(st, pts, flags);
1691  if (index >= 0) {
1692  /* find the position */
1693  uint64_t pos = st->index_entries[index].pos;
1694 
1695  /* do the seek */
1696  av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1697  if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1698  return -1;
1699  asf_reset_header(s);
1700  skip_to_key(s);
1701  return 0;
1702  }
1703  }
1704  /* no index or seeking by index failed */
1705  if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1706  return -1;
1707  asf_reset_header(s);
1708  skip_to_key(s);
1709  return 0;
1710 }
1711 
1713  .name = "asf",
1714  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1715  .priv_data_size = sizeof(ASFContext),
1716  .read_probe = asf_probe,
1721  .read_timestamp = asf_read_pts,
1723  .priv_class = &asf_class,
1724 };
uint32_t palette[256]
Definition: asfdec_f.c:68
const char * name
Definition: avisynth_c.h:775
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:802
#define AVFMT_NOBINSEARCH
Format does not allow to fall back on binary search via read_timestamp.
Definition: avformat.h:475
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:646
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:336
#define DO_2BITS(bits, var, defval)
Definition: asfdec_f.c:950
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:1510
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:680
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:2048
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:3136
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:1465
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:4899
const char * g
Definition: vf_curves.c:115
const char * desc
Definition: nvenc.c:65
int64_t pos
Definition: avformat.h:803
int num
Definition: asfdec_f.c:48
#define avpriv_request_sample(...)
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:3900
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:936
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:875
int size
Definition: avcodec.h:1446
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:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1103
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
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
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:803
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:1152
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:4597
Format I/O context.
Definition: avformat.h:1351
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:1927
#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:247
static int64_t start_time
Definition: ffplay.c:330
uint8_t
uint32_t flags
0x01 - broadcast 0x02 - seekable rest is reserved should be 0
Definition: asf.h:52
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: avcodec.h:3966
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:1457
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1192
#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:1092
int id
Format-specific stream ID.
Definition: avformat.h:881
int64_t packet_time_start
Definition: asfdec_f.c:107
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:4469
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
int packet_size_left
Definition: asfdec_f.c:83
static void finish(void)
Definition: movenc.c:345
uint8_t * data
Definition: avcodec.h:1445
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:313
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:748
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:647
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:3929
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1477
static int asf_read_metadata(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:700
#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:810
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:258
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
#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: avcodec.h:1158
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:2159
static const AVOption options[]
Definition: asfdec_f.c:120
static int asf_build_simple_index(AVFormatContext *s, int stream_index)
Definition: asfdec_f.c:1589
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:769
#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:188
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:3896
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1428
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1136
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:236
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:627
int side_data_elems
Definition: avcodec.h:1457
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
#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:117
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1451
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3918
Definition: asf.h:32
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:638
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:1525
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:130
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:1532
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
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
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
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
int n
Definition: avisynth_c.h:684
AVDictionary * metadata
Definition: avformat.h:938
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:1097
if(ret< 0)
Definition: vf_mcdeint.c:279
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
Definition: asfdec_f.c:1657
#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:842
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:548
uint8_t ff_asf_guid[16]
Definition: riff.h:90
Stream structure.
Definition: avformat.h:874
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:1712
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:598
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:476
void * buf
Definition: avisynth_c.h:690
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:448
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:1777
full parsing and repack of the first frame only, only implemented for H.264 currently ...
Definition: avformat.h:796
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:610
uint8_t type
Definition: asfdec_f.c:43
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:923
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:460
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:793
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:753
Main libavformat public API header.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1456
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:788
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:927
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:1130
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:782
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:1241
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: avcodec.h:3942
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3914
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:1444
static int asf_probe(AVProbeData *pd)
Definition: asfdec_f.c:189
int stream_index
Definition: asfdec_f.c:110
#define av_freep(p)
void INT64 INT64 count
Definition: avisynth_c.h:690
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:106
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:358
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3904
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:1226
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:1447
Definition: asf.h:33
#define MKTAG(a, b, c, d)
Definition: common.h:366
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:929
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: riff.h:116
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1132
enum AVCodecID id
This structure stores compressed data.
Definition: avcodec.h:1422
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:777
#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:975
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:1438
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:956
static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
Definition: asfdec_f.c:567
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:2174
#define av_unused
Definition: attributes.h:125
static void asf_reset_header(AVFormatContext *s)
Definition: asfdec_f.c:1477