FFmpeg
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:346
#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
AVOption.
Definition: opt.h:248
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
const char * desc
Definition: libsvtav1.c:79
int ts_is_pts
Definition: asfdec_f.c:104
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:383
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
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:364
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:253
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
GLint GLenum type
Definition: opengl_enc.c:104
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:341
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
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
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:220
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
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
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:108
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:363
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:210
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
ptrdiff_t size
Definition: opengl_enc.c:100
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:637
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:396
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
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:194
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:759
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:153
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:215
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:346
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().
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:375
static const AVClass asf_class
Definition: asfdec_f.c:126
int frag_offset
Definition: asfdec_f.c:52
GLsizei count
Definition: opengl_enc.c:108
#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:369
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:628
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
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
if(ret)
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:205
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:606
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
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:279
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:560
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:743
Main libavformat public API header.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: packet.h:374
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
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:1221
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:362
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:368
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:81
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:365
Definition: asf.h:33
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#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:340
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:767
#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:356
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
int i
Definition: input.c:407
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
const char * name
Definition: opengl_enc.c:102