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id3v2.c
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1 /*
2  * Copyright (c) 2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * ID3v2 header parser
24  *
25  * Specifications available at:
26  * http://id3.org/Developer_Information
27  */
28 
29 #include "config.h"
30 
31 #if CONFIG_ZLIB
32 #include <zlib.h>
33 #endif
34 
35 #include "libavutil/avstring.h"
36 #include "libavutil/dict.h"
37 #include "libavutil/intreadwrite.h"
38 #include "avio_internal.h"
39 #include "internal.h"
40 #include "id3v1.h"
41 #include "id3v2.h"
42 
44  { "TALB", "album" },
45  { "TCOM", "composer" },
46  { "TCON", "genre" },
47  { "TCOP", "copyright" },
48  { "TENC", "encoded_by" },
49  { "TIT2", "title" },
50  { "TLAN", "language" },
51  { "TPE1", "artist" },
52  { "TPE2", "album_artist" },
53  { "TPE3", "performer" },
54  { "TPOS", "disc" },
55  { "TPUB", "publisher" },
56  { "TRCK", "track" },
57  { "TSSE", "encoder" },
58  { "USLT", "lyrics" },
59  { 0 }
60 };
61 
63  { "TCMP", "compilation" },
64  { "TDRC", "date" },
65  { "TDRL", "date" },
66  { "TDEN", "creation_time" },
67  { "TSOA", "album-sort" },
68  { "TSOP", "artist-sort" },
69  { "TSOT", "title-sort" },
70  { 0 }
71 };
72 
74  { "TAL", "album" },
75  { "TCO", "genre" },
76  { "TCP", "compilation" },
77  { "TT2", "title" },
78  { "TEN", "encoded_by" },
79  { "TP1", "artist" },
80  { "TP2", "album_artist" },
81  { "TP3", "performer" },
82  { "TRK", "track" },
83  { 0 }
84 };
85 
86 const char ff_id3v2_tags[][4] = {
87  "TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDLY", "TENC", "TEXT",
88  "TFLT", "TIT1", "TIT2", "TIT3", "TKEY", "TLAN", "TLEN", "TMED",
89  "TOAL", "TOFN", "TOLY", "TOPE", "TOWN", "TPE1", "TPE2", "TPE3",
90  "TPE4", "TPOS", "TPUB", "TRCK", "TRSN", "TRSO", "TSRC", "TSSE",
91  { 0 },
92 };
93 
94 const char ff_id3v2_4_tags[][4] = {
95  "TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
96  "TPRO", "TSOA", "TSOP", "TSOT", "TSST",
97  { 0 },
98 };
99 
100 const char ff_id3v2_3_tags[][4] = {
101  "TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
102  { 0 },
103 };
104 
105 const char *ff_id3v2_picture_types[21] = {
106  "Other",
107  "32x32 pixels 'file icon'",
108  "Other file icon",
109  "Cover (front)",
110  "Cover (back)",
111  "Leaflet page",
112  "Media (e.g. label side of CD)",
113  "Lead artist/lead performer/soloist",
114  "Artist/performer",
115  "Conductor",
116  "Band/Orchestra",
117  "Composer",
118  "Lyricist/text writer",
119  "Recording Location",
120  "During recording",
121  "During performance",
122  "Movie/video screen capture",
123  "A bright coloured fish",
124  "Illustration",
125  "Band/artist logotype",
126  "Publisher/Studio logotype",
127 };
128 
130  { "image/gif", AV_CODEC_ID_GIF },
131  { "image/jpeg", AV_CODEC_ID_MJPEG },
132  { "image/jpg", AV_CODEC_ID_MJPEG },
133  { "image/png", AV_CODEC_ID_PNG },
134  { "image/tiff", AV_CODEC_ID_TIFF },
135  { "image/bmp", AV_CODEC_ID_BMP },
136  { "JPG", AV_CODEC_ID_MJPEG }, /* ID3v2.2 */
137  { "PNG", AV_CODEC_ID_PNG }, /* ID3v2.2 */
138  { "", AV_CODEC_ID_NONE },
139 };
140 
141 int ff_id3v2_match(const uint8_t *buf, const char *magic)
142 {
143  return buf[0] == magic[0] &&
144  buf[1] == magic[1] &&
145  buf[2] == magic[2] &&
146  buf[3] != 0xff &&
147  buf[4] != 0xff &&
148  (buf[6] & 0x80) == 0 &&
149  (buf[7] & 0x80) == 0 &&
150  (buf[8] & 0x80) == 0 &&
151  (buf[9] & 0x80) == 0;
152 }
153 
155 {
156  int len = ((buf[6] & 0x7f) << 21) +
157  ((buf[7] & 0x7f) << 14) +
158  ((buf[8] & 0x7f) << 7) +
159  (buf[9] & 0x7f) +
161  if (buf[5] & 0x10)
162  len += ID3v2_HEADER_SIZE;
163  return len;
164 }
165 
166 static unsigned int get_size(AVIOContext *s, int len)
167 {
168  int v = 0;
169  while (len--)
170  v = (v << 7) + (avio_r8(s) & 0x7F);
171  return v;
172 }
173 
174 static unsigned int size_to_syncsafe(unsigned int size)
175 {
176  return (((size) & (0x7f << 0)) >> 0) +
177  (((size) & (0x7f << 8)) >> 1) +
178  (((size) & (0x7f << 16)) >> 2) +
179  (((size) & (0x7f << 24)) >> 3);
180 }
181 
182 /* No real verification, only check that the tag consists of
183  * a combination of capital alpha-numerical characters */
184 static int is_tag(const char *buf, unsigned int len)
185 {
186  if (!len)
187  return 0;
188 
189  while (len--)
190  if ((buf[len] < 'A' ||
191  buf[len] > 'Z') &&
192  (buf[len] < '0' ||
193  buf[len] > '9'))
194  return 0;
195 
196  return 1;
197 }
198 
199 /**
200  * Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error
201  */
202 static int check_tag(AVIOContext *s, int offset, unsigned int len)
203 {
204  char tag[4];
205 
206  if (len > 4 ||
207  avio_seek(s, offset, SEEK_SET) < 0 ||
208  avio_read(s, tag, len) < (int)len)
209  return -1;
210  else if (!AV_RB32(tag) || is_tag(tag, len))
211  return 1;
212 
213  return 0;
214 }
215 
216 /**
217  * Free GEOB type extra metadata.
218  */
219 static void free_geobtag(void *obj)
220 {
221  ID3v2ExtraMetaGEOB *geob = obj;
222  av_freep(&geob->mime_type);
223  av_freep(&geob->file_name);
224  av_freep(&geob->description);
225  av_freep(&geob->data);
226  av_free(geob);
227 }
228 
229 /**
230  * Decode characters to UTF-8 according to encoding type. The decoded buffer is
231  * always null terminated. Stop reading when either *maxread bytes are read from
232  * pb or U+0000 character is found.
233  *
234  * @param dst Pointer where the address of the buffer with the decoded bytes is
235  * stored. Buffer must be freed by caller.
236  * @param maxread Pointer to maximum number of characters to read from the
237  * AVIOContext. After execution the value is decremented by the number of bytes
238  * actually read.
239  * @returns 0 if no error occurred, dst is uninitialized on error
240  */
241 static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding,
242  uint8_t **dst, int *maxread)
243 {
244  int ret;
245  uint8_t tmp;
246  uint32_t ch = 1;
247  int left = *maxread;
248  unsigned int (*get)(AVIOContext*) = avio_rb16;
249  AVIOContext *dynbuf;
250 
251  if ((ret = avio_open_dyn_buf(&dynbuf)) < 0) {
252  av_log(s, AV_LOG_ERROR, "Error opening memory stream\n");
253  return ret;
254  }
255 
256  switch (encoding) {
258  while (left && ch) {
259  ch = avio_r8(pb);
260  PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
261  left--;
262  }
263  break;
264 
266  if ((left -= 2) < 0) {
267  av_log(s, AV_LOG_ERROR, "Cannot read BOM value, input too short\n");
268  ffio_free_dyn_buf(&dynbuf);
269  *dst = NULL;
270  return AVERROR_INVALIDDATA;
271  }
272  switch (avio_rb16(pb)) {
273  case 0xfffe:
274  get = avio_rl16;
275  case 0xfeff:
276  break;
277  default:
278  av_log(s, AV_LOG_ERROR, "Incorrect BOM value\n");
279  ffio_free_dyn_buf(&dynbuf);
280  *dst = NULL;
281  *maxread = left;
282  return AVERROR_INVALIDDATA;
283  }
284  // fall-through
285 
287  while ((left > 1) && ch) {
288  GET_UTF16(ch, ((left -= 2) >= 0 ? get(pb) : 0), break;)
289  PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
290  }
291  if (left < 0)
292  left += 2; /* did not read last char from pb */
293  break;
294 
295  case ID3v2_ENCODING_UTF8:
296  while (left && ch) {
297  ch = avio_r8(pb);
298  avio_w8(dynbuf, ch);
299  left--;
300  }
301  break;
302  default:
303  av_log(s, AV_LOG_WARNING, "Unknown encoding\n");
304  }
305 
306  if (ch)
307  avio_w8(dynbuf, 0);
308 
309  avio_close_dyn_buf(dynbuf, dst);
310  *maxread = left;
311 
312  return 0;
313 }
314 
315 /**
316  * Parse a text tag.
317  */
318 static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen,
319  AVDictionary **metadata, const char *key)
320 {
321  uint8_t *dst;
322  int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
323  unsigned genre;
324 
325  if (taglen < 1)
326  return;
327 
328  encoding = avio_r8(pb);
329  taglen--; /* account for encoding type byte */
330 
331  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
332  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
333  return;
334  }
335 
336  if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) &&
337  (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) &&
338  genre <= ID3v1_GENRE_MAX) {
339  av_freep(&dst);
340  dst = av_strdup(ff_id3v1_genre_str[genre]);
341  } else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) {
342  /* dst now contains the key, need to get value */
343  key = dst;
344  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
345  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
346  av_freep(&key);
347  return;
348  }
349  dict_flags |= AV_DICT_DONT_STRDUP_KEY;
350  } else if (!*dst)
351  av_freep(&dst);
352 
353  if (dst)
354  av_dict_set(metadata, key, dst, dict_flags);
355 }
356 
357 static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen,
358  AVDictionary **metadata)
359 {
360  uint8_t lang[4];
361  uint8_t *descriptor = NULL; // 'Content descriptor'
362  uint8_t *text = NULL;
363  char *key = NULL;
364  int encoding;
365  int ok = 0;
366 
367  if (taglen < 1)
368  goto error;
369 
370  encoding = avio_r8(pb);
371  taglen--;
372 
373  if (avio_read(pb, lang, 3) < 3)
374  goto error;
375  lang[3] = '\0';
376  taglen -= 3;
377 
378  if (decode_str(s, pb, encoding, &descriptor, &taglen) < 0)
379  goto error;
380 
381  if (decode_str(s, pb, encoding, &text, &taglen) < 0)
382  goto error;
383 
384  // FFmpeg does not support hierarchical metadata, so concatenate the keys.
385  key = av_asprintf("lyrics-%s%s%s", descriptor[0] ? (char *)descriptor : "",
386  descriptor[0] ? "-" : "",
387  lang);
388  if (!key)
389  goto error;
390 
391  av_dict_set(metadata, key, text, 0);
392 
393  ok = 1;
394 error:
395  if (!ok)
396  av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n");
397  av_free(descriptor);
398  av_free(text);
399  av_free(key);
400 }
401 
402 /**
403  * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
404  */
405 static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen,
406  const char *tag, ID3v2ExtraMeta **extra_meta,
407  int isv34)
408 {
409  ID3v2ExtraMetaGEOB *geob_data = NULL;
410  ID3v2ExtraMeta *new_extra = NULL;
411  char encoding;
412  unsigned int len;
413 
414  if (taglen < 1)
415  return;
416 
417  geob_data = av_mallocz(sizeof(ID3v2ExtraMetaGEOB));
418  if (!geob_data) {
419  av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
420  sizeof(ID3v2ExtraMetaGEOB));
421  return;
422  }
423 
424  new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
425  if (!new_extra) {
426  av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
427  sizeof(ID3v2ExtraMeta));
428  goto fail;
429  }
430 
431  /* read encoding type byte */
432  encoding = avio_r8(pb);
433  taglen--;
434 
435  /* read MIME type (always ISO-8859) */
436  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type,
437  &taglen) < 0 ||
438  taglen <= 0)
439  goto fail;
440 
441  /* read file name */
442  if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 ||
443  taglen <= 0)
444  goto fail;
445 
446  /* read content description */
447  if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 ||
448  taglen < 0)
449  goto fail;
450 
451  if (taglen) {
452  /* save encapsulated binary data */
453  geob_data->data = av_malloc(taglen);
454  if (!geob_data->data) {
455  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
456  goto fail;
457  }
458  if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
460  "Error reading GEOB frame, data truncated.\n");
461  geob_data->datasize = len;
462  } else {
463  geob_data->data = NULL;
464  geob_data->datasize = 0;
465  }
466 
467  /* add data to the list */
468  new_extra->tag = "GEOB";
469  new_extra->data = geob_data;
470  new_extra->next = *extra_meta;
471  *extra_meta = new_extra;
472 
473  return;
474 
475 fail:
476  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
477  free_geobtag(geob_data);
478  av_free(new_extra);
479  return;
480 }
481 
482 static int is_number(const char *str)
483 {
484  while (*str >= '0' && *str <= '9')
485  str++;
486  return !*str;
487 }
488 
490 {
492  if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
493  strlen(t->value) == 4 && is_number(t->value))
494  return t;
495  return NULL;
496 }
497 
498 static void merge_date(AVDictionary **m)
499 {
501  char date[17] = { 0 }; // YYYY-MM-DD hh:mm
502 
503  if (!(t = get_date_tag(*m, "TYER")) &&
504  !(t = get_date_tag(*m, "TYE")))
505  return;
506  av_strlcpy(date, t->value, 5);
507  av_dict_set(m, "TYER", NULL, 0);
508  av_dict_set(m, "TYE", NULL, 0);
509 
510  if (!(t = get_date_tag(*m, "TDAT")) &&
511  !(t = get_date_tag(*m, "TDA")))
512  goto finish;
513  snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
514  av_dict_set(m, "TDAT", NULL, 0);
515  av_dict_set(m, "TDA", NULL, 0);
516 
517  if (!(t = get_date_tag(*m, "TIME")) &&
518  !(t = get_date_tag(*m, "TIM")))
519  goto finish;
520  snprintf(date + 10, sizeof(date) - 10,
521  " %.2s:%.2s", t->value, t->value + 2);
522  av_dict_set(m, "TIME", NULL, 0);
523  av_dict_set(m, "TIM", NULL, 0);
524 
525 finish:
526  if (date[0])
527  av_dict_set(m, "date", date, 0);
528 }
529 
530 static void free_apic(void *obj)
531 {
532  ID3v2ExtraMetaAPIC *apic = obj;
533  av_buffer_unref(&apic->buf);
534  av_freep(&apic->description);
535  av_freep(&apic);
536 }
537 
538 static void rstrip_spaces(char *buf)
539 {
540  size_t len = strlen(buf);
541  while (len > 0 && buf[len - 1] == ' ')
542  buf[--len] = 0;
543 }
544 
545 static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen,
546  const char *tag, ID3v2ExtraMeta **extra_meta,
547  int isv34)
548 {
549  int enc, pic_type;
550  char mimetype[64];
551  const CodecMime *mime = ff_id3v2_mime_tags;
552  enum AVCodecID id = AV_CODEC_ID_NONE;
553  ID3v2ExtraMetaAPIC *apic = NULL;
554  ID3v2ExtraMeta *new_extra = NULL;
555  int64_t end = avio_tell(pb) + taglen;
556 
557  if (taglen <= 4 || (!isv34 && taglen <= 6))
558  goto fail;
559 
560  new_extra = av_mallocz(sizeof(*new_extra));
561  apic = av_mallocz(sizeof(*apic));
562  if (!new_extra || !apic)
563  goto fail;
564 
565  enc = avio_r8(pb);
566  taglen--;
567 
568  /* mimetype */
569  if (isv34) {
570  taglen -= avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
571  } else {
572  avio_read(pb, mimetype, 3);
573  mimetype[3] = 0;
574  taglen -= 3;
575  }
576 
577  while (mime->id != AV_CODEC_ID_NONE) {
578  if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
579  id = mime->id;
580  break;
581  }
582  mime++;
583  }
584  if (id == AV_CODEC_ID_NONE) {
586  "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
587  goto fail;
588  }
589  apic->id = id;
590 
591  /* picture type */
592  pic_type = avio_r8(pb);
593  taglen--;
594  if (pic_type < 0 || pic_type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
595  av_log(s, AV_LOG_WARNING, "Unknown attached picture type %d.\n",
596  pic_type);
597  pic_type = 0;
598  }
599  apic->type = ff_id3v2_picture_types[pic_type];
600 
601  /* description and picture data */
602  if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
603  av_log(s, AV_LOG_ERROR,
604  "Error decoding attached picture description.\n");
605  goto fail;
606  }
607 
609  if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen)
610  goto fail;
611  memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
612 
613  new_extra->tag = "APIC";
614  new_extra->data = apic;
615  new_extra->next = *extra_meta;
616  *extra_meta = new_extra;
617 
618  // The description must be unique, and some ID3v2 tag writers add spaces
619  // to write several APIC entries with the same description.
620  rstrip_spaces(apic->description);
621 
622  return;
623 
624 fail:
625  if (apic)
626  free_apic(apic);
627  av_freep(&new_extra);
628  avio_seek(pb, end, SEEK_SET);
629 }
630 
631 static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34)
632 {
633  AVRational time_base = {1, 1000};
634  uint32_t start, end;
635  AVChapter *chapter;
636  uint8_t *dst = NULL;
637  int taglen;
638  char tag[5];
639 
640  if (!s) {
641  /* We should probably just put the chapter data to extra_meta here
642  * and do the AVFormatContext-needing part in a separate
643  * ff_id3v2_parse_apic()-like function. */
644  av_log(NULL, AV_LOG_DEBUG, "No AVFormatContext, skipped ID3 chapter data\n");
645  return;
646  }
647 
648  if (decode_str(s, pb, 0, &dst, &len) < 0)
649  return;
650  if (len < 16)
651  return;
652 
653  start = avio_rb32(pb);
654  end = avio_rb32(pb);
655  avio_skip(pb, 8);
656 
657  chapter = avpriv_new_chapter(s, s->nb_chapters + 1, time_base, start, end, dst);
658  if (!chapter) {
659  av_free(dst);
660  return;
661  }
662 
663  len -= 16;
664  while (len > 10) {
665  if (avio_read(pb, tag, 4) < 4)
666  goto end;
667  tag[4] = 0;
668  taglen = avio_rb32(pb);
669  avio_skip(pb, 2);
670  len -= 10;
671  if (taglen < 0 || taglen > len)
672  goto end;
673  if (tag[0] == 'T')
674  read_ttag(s, pb, taglen, &chapter->metadata, tag);
675  else
676  avio_skip(pb, taglen);
677  len -= taglen;
678  }
679 
680  ff_metadata_conv(&chapter->metadata, NULL, ff_id3v2_34_metadata_conv);
681  ff_metadata_conv(&chapter->metadata, NULL, ff_id3v2_4_metadata_conv);
682 end:
683  av_free(dst);
684 }
685 
686 static void free_priv(void *obj)
687 {
688  ID3v2ExtraMetaPRIV *priv = obj;
689  av_freep(&priv->owner);
690  av_freep(&priv->data);
691  av_freep(&priv);
692 }
693 
694 static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen,
695  const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
696 {
697  ID3v2ExtraMeta *meta;
698  ID3v2ExtraMetaPRIV *priv;
699 
700  meta = av_mallocz(sizeof(*meta));
701  priv = av_mallocz(sizeof(*priv));
702 
703  if (!meta || !priv)
704  goto fail;
705 
706  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0)
707  goto fail;
708 
709  priv->data = av_malloc(taglen);
710  if (!priv->data)
711  goto fail;
712 
713  priv->datasize = taglen;
714 
715  if (avio_read(pb, priv->data, priv->datasize) != priv->datasize)
716  goto fail;
717 
718  meta->tag = "PRIV";
719  meta->data = priv;
720  meta->next = *extra_meta;
721  *extra_meta = meta;
722 
723  return;
724 
725 fail:
726  if (priv)
727  free_priv(priv);
728  av_freep(&meta);
729 }
730 
731 typedef struct ID3v2EMFunc {
732  const char *tag3;
733  const char *tag4;
734  void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen,
735  const char *tag, ID3v2ExtraMeta **extra_meta,
736  int isv34);
737  void (*free)(void *obj);
738 } ID3v2EMFunc;
739 
741  { "GEO", "GEOB", read_geobtag, free_geobtag },
742  { "PIC", "APIC", read_apic, free_apic },
743  { "CHAP","CHAP", read_chapter, NULL },
744  { "PRIV","PRIV", read_priv, free_priv },
745  { NULL }
746 };
747 
748 /**
749  * Get the corresponding ID3v2EMFunc struct for a tag.
750  * @param isv34 Determines if v2.2 or v2.3/4 strings are used
751  * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
752  */
753 static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
754 {
755  int i = 0;
756  while (id3v2_extra_meta_funcs[i].tag3) {
757  if (tag && !memcmp(tag,
758  (isv34 ? id3v2_extra_meta_funcs[i].tag4 :
759  id3v2_extra_meta_funcs[i].tag3),
760  (isv34 ? 4 : 3)))
761  return &id3v2_extra_meta_funcs[i];
762  i++;
763  }
764  return NULL;
765 }
766 
767 static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
769  uint8_t flags, ID3v2ExtraMeta **extra_meta)
770 {
771  int isv34, unsync;
772  unsigned tlen;
773  char tag[5];
774  int64_t next, end = avio_tell(pb) + len;
775  int taghdrlen;
776  const char *reason = NULL;
777  AVIOContext pb_local;
778  AVIOContext *pbx;
779  unsigned char *buffer = NULL;
780  int buffer_size = 0;
781  const ID3v2EMFunc *extra_func = NULL;
782  unsigned char *uncompressed_buffer = NULL;
783  av_unused int uncompressed_buffer_size = 0;
784 
785  av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
786 
787  switch (version) {
788  case 2:
789  if (flags & 0x40) {
790  reason = "compression";
791  goto error;
792  }
793  isv34 = 0;
794  taghdrlen = 6;
795  break;
796 
797  case 3:
798  case 4:
799  isv34 = 1;
800  taghdrlen = 10;
801  break;
802 
803  default:
804  reason = "version";
805  goto error;
806  }
807 
808  unsync = flags & 0x80;
809 
810  if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */
811  int extlen = get_size(pb, 4);
812  if (version == 4)
813  /* In v2.4 the length includes the length field we just read. */
814  extlen -= 4;
815 
816  if (extlen < 0) {
817  reason = "invalid extended header length";
818  goto error;
819  }
820  avio_skip(pb, extlen);
821  len -= extlen + 4;
822  if (len < 0) {
823  reason = "extended header too long.";
824  goto error;
825  }
826  }
827 
828  while (len >= taghdrlen) {
829  unsigned int tflags = 0;
830  int tunsync = 0;
831  int tcomp = 0;
832  int tencr = 0;
833  unsigned long av_unused dlen;
834 
835  if (isv34) {
836  if (avio_read(pb, tag, 4) < 4)
837  break;
838  tag[4] = 0;
839  if (version == 3) {
840  tlen = avio_rb32(pb);
841  } else {
842  /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
843  * so check the next tag to see which one to use */
844  tlen = avio_rb32(pb);
845  if (tlen > 0x7f) {
846  if (tlen < len) {
847  int64_t cur = avio_tell(pb);
848 
849  if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */))
850  break;
851 
852  if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1)
853  tlen = size_to_syncsafe(tlen);
854  else if (check_tag(pb, cur + 2 + tlen, 4) != 1)
855  break;
856  avio_seek(pb, cur, SEEK_SET);
857  } else
858  tlen = size_to_syncsafe(tlen);
859  }
860  }
861  tflags = avio_rb16(pb);
862  tunsync = tflags & ID3v2_FLAG_UNSYNCH;
863  } else {
864  if (avio_read(pb, tag, 3) < 3)
865  break;
866  tag[3] = 0;
867  tlen = avio_rb24(pb);
868  }
869  if (tlen > (1<<28))
870  break;
871  len -= taghdrlen + tlen;
872 
873  if (len < 0)
874  break;
875 
876  next = avio_tell(pb) + tlen;
877 
878  if (!tlen) {
879  if (tag[0])
880  av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n",
881  tag);
882  continue;
883  }
884 
885  if (tflags & ID3v2_FLAG_DATALEN) {
886  if (tlen < 4)
887  break;
888  dlen = avio_rb32(pb);
889  tlen -= 4;
890  } else
891  dlen = tlen;
892 
893  tcomp = tflags & ID3v2_FLAG_COMPRESSION;
894  tencr = tflags & ID3v2_FLAG_ENCRYPTION;
895 
896  /* skip encrypted tags and, if no zlib, compressed tags */
897  if (tencr || (!CONFIG_ZLIB && tcomp)) {
898  const char *type;
899  if (!tcomp)
900  type = "encrypted";
901  else if (!tencr)
902  type = "compressed";
903  else
904  type = "encrypted and compressed";
905 
906  av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag);
907  avio_skip(pb, tlen);
908  /* check for text tag or supported special meta tag */
909  } else if (tag[0] == 'T' ||
910  !memcmp(tag, "USLT", 4) ||
911  (extra_meta &&
912  (extra_func = get_extra_meta_func(tag, isv34)))) {
913  pbx = pb;
914 
915  if (unsync || tunsync || tcomp) {
916  av_fast_malloc(&buffer, &buffer_size, tlen);
917  if (!buffer) {
918  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
919  goto seek;
920  }
921  }
922  if (unsync || tunsync) {
923  int64_t end = avio_tell(pb) + tlen;
924  uint8_t *b;
925 
926  b = buffer;
927  while (avio_tell(pb) < end && b - buffer < tlen && !pb->eof_reached) {
928  *b++ = avio_r8(pb);
929  if (*(b - 1) == 0xff && avio_tell(pb) < end - 1 &&
930  b - buffer < tlen &&
931  !pb->eof_reached ) {
932  uint8_t val = avio_r8(pb);
933  *b++ = val ? val : avio_r8(pb);
934  }
935  }
936  ffio_init_context(&pb_local, buffer, b - buffer, 0, NULL, NULL, NULL,
937  NULL);
938  tlen = b - buffer;
939  pbx = &pb_local; // read from sync buffer
940  }
941 
942 #if CONFIG_ZLIB
943  if (tcomp) {
944  int err;
945 
946  av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen);
947 
948  av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen);
949  if (!uncompressed_buffer) {
950  av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
951  goto seek;
952  }
953 
954  if (!(unsync || tunsync)) {
955  err = avio_read(pb, buffer, tlen);
956  if (err < 0) {
957  av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n");
958  goto seek;
959  }
960  tlen = err;
961  }
962 
963  err = uncompress(uncompressed_buffer, &dlen, buffer, tlen);
964  if (err != Z_OK) {
965  av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
966  goto seek;
967  }
968  ffio_init_context(&pb_local, uncompressed_buffer, dlen, 0, NULL, NULL, NULL, NULL);
969  tlen = dlen;
970  pbx = &pb_local; // read from sync buffer
971  }
972 #endif
973  if (tag[0] == 'T')
974  /* parse text tag */
975  read_ttag(s, pbx, tlen, metadata, tag);
976  else if (!memcmp(tag, "USLT", 4))
977  read_uslt(s, pbx, tlen, metadata);
978  else
979  /* parse special meta tag */
980  extra_func->read(s, pbx, tlen, tag, extra_meta, isv34);
981  } else if (!tag[0]) {
982  if (tag[1])
983  av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n");
984  avio_skip(pb, tlen);
985  break;
986  }
987  /* Skip to end of tag */
988 seek:
989  avio_seek(pb, next, SEEK_SET);
990  }
991 
992  /* Footer preset, always 10 bytes, skip over it */
993  if (version == 4 && flags & 0x10)
994  end += 10;
995 
996 error:
997  if (reason)
998  av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n",
999  version, reason);
1000  avio_seek(pb, end, SEEK_SET);
1001  av_free(buffer);
1002  av_free(uncompressed_buffer);
1003  return;
1004 }
1005 
1006 static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata,
1007  AVFormatContext *s, const char *magic,
1008  ID3v2ExtraMeta **extra_meta, int64_t max_search_size)
1009 {
1010  int len, ret;
1012  int found_header;
1013  int64_t start, off;
1014 
1015  if (max_search_size && max_search_size < ID3v2_HEADER_SIZE)
1016  return;
1017 
1018  start = avio_tell(pb);
1019  do {
1020  /* save the current offset in case there's nothing to read/skip */
1021  off = avio_tell(pb);
1022  if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) {
1023  avio_seek(pb, off, SEEK_SET);
1024  break;
1025  }
1026 
1027  ret = avio_read(pb, buf, ID3v2_HEADER_SIZE);
1028  if (ret != ID3v2_HEADER_SIZE) {
1029  avio_seek(pb, off, SEEK_SET);
1030  break;
1031  }
1032  found_header = ff_id3v2_match(buf, magic);
1033  if (found_header) {
1034  /* parse ID3v2 header */
1035  len = ((buf[6] & 0x7f) << 21) |
1036  ((buf[7] & 0x7f) << 14) |
1037  ((buf[8] & 0x7f) << 7) |
1038  (buf[9] & 0x7f);
1039  id3v2_parse(pb, metadata, s, len, buf[3], buf[5], extra_meta);
1040  } else {
1041  avio_seek(pb, off, SEEK_SET);
1042  }
1043  } while (found_header);
1044  ff_metadata_conv(metadata, NULL, ff_id3v2_34_metadata_conv);
1045  ff_metadata_conv(metadata, NULL, id3v2_2_metadata_conv);
1046  ff_metadata_conv(metadata, NULL, ff_id3v2_4_metadata_conv);
1047  merge_date(metadata);
1048 }
1049 
1051  const char *magic, ID3v2ExtraMeta **extra_meta)
1052 {
1053  id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0);
1054 }
1055 
1056 void ff_id3v2_read(AVFormatContext *s, const char *magic,
1057  ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
1058 {
1059  id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size);
1060 }
1061 
1063 {
1064  ID3v2ExtraMeta *current = *extra_meta, *next;
1065  const ID3v2EMFunc *extra_func;
1066 
1067  while (current) {
1068  if ((extra_func = get_extra_meta_func(current->tag, 1)))
1069  extra_func->free(current->data);
1070  next = current->next;
1071  av_freep(&current);
1072  current = next;
1073  }
1074 
1075  *extra_meta = NULL;
1076 }
1077 
1079 {
1080  ID3v2ExtraMeta *cur;
1081 
1082  for (cur = *extra_meta; cur; cur = cur->next) {
1083  ID3v2ExtraMetaAPIC *apic;
1084  AVStream *st;
1085 
1086  if (strcmp(cur->tag, "APIC"))
1087  continue;
1088  apic = cur->data;
1089 
1090  if (!(st = avformat_new_stream(s, NULL)))
1091  return AVERROR(ENOMEM);
1092 
1095  st->codecpar->codec_id = apic->id;
1096 
1097  if (AV_RB64(apic->buf->data) == 0x89504e470d0a1a0a)
1099 
1100  if (apic->description[0])
1101  av_dict_set(&st->metadata, "title", apic->description, 0);
1102 
1103  av_dict_set(&st->metadata, "comment", apic->type, 0);
1104 
1106  st->attached_pic.buf = apic->buf;
1107  st->attached_pic.data = apic->buf->data;
1109  st->attached_pic.stream_index = st->index;
1111 
1112  apic->buf = NULL;
1113  }
1114 
1115  return 0;
1116 }
unsigned int nb_chapters
Number of chapters in AVChapter array.
Definition: avformat.h:1522
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:634
const char * s
Definition: avisynth_c.h:631
void * data
Definition: id3v2.h:57
Bytestream IO Context.
Definition: avio.h:111
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:124
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1224
enum AVCodecID id
Definition: mxfenc.c:104
static int is_number(const char *str)
Definition: id3v2.c:482
static AVDictionaryEntry * get_date_tag(AVDictionary *m, const char *tag)
Definition: id3v2.c:489
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define AV_DICT_DONT_OVERWRITE
Don't overwrite existing entries.
Definition: dict.h:79
static const ID3v2EMFunc id3v2_extra_meta_funcs[]
Definition: id3v2.c:740
static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata, AVFormatContext *s, int len, uint8_t version, uint8_t flags, ID3v2ExtraMeta **extra_meta)
Definition: id3v2.c:767
const char * tag3
Definition: id3v2.c:732
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3915
uint32_t datasize
Definition: id3v2.h:62
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: avcodec.h:1578
const char * b
Definition: vf_curves.c:109
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:213
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:545
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:287
static void free_apic(void *obj)
Definition: id3v2.c:530
const char ff_id3v2_4_tags[][4]
ID3v2.4-only text information frames.
Definition: id3v2.c:94
int version
Definition: avisynth_c.h:629
#define PUT_UTF8(val, tmp, PUT_BYTE)
Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
Definition: common.h:414
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:688
AVDictionary * metadata
Definition: avformat.h:1286
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1078
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1212
static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding, uint8_t **dst, int *maxread)
Decode characters to UTF-8 according to encoding type.
Definition: id3v2.c:241
#define AV_DICT_DONT_STRDUP_KEY
Take ownership of a key that's been allocated with av_malloc() or another memory allocation function...
Definition: dict.h:73
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:4167
Format I/O context.
Definition: avformat.h:1319
char str[32]
Definition: internal.h:50
void(* read)(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:734
Public dictionary API.
static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata, AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, int64_t max_search_size)
Definition: id3v2.c:1006
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
const AVMetadataConv ff_id3v2_34_metadata_conv[]
Definition: id3v2.c:43
uint8_t
#define av_malloc(s)
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:703
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4043
static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:694
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
uint8_t * description
Definition: id3v2.h:65
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
uint8_t * data
Definition: avcodec.h:1577
const char * type
Definition: id3v2.h:71
uint32_t tag
Definition: movenc.c:1353
enum AVCodecID id
Definition: internal.h:51
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:447
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:550
unsigned m
Definition: audioconvert.c:187
uint8_t * data
Definition: id3v2.h:66
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1609
static int is_tag(const char *buf, unsigned int len)
Definition: id3v2.c:184
#define GET_UTF16(val, GET_16BIT, ERROR)
Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.
Definition: common.h:386
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:189
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1533
const AVMetadataConv ff_id3v2_4_metadata_conv[]
Definition: id3v2.c:62
#define AVERROR(e)
Definition: error.h:43
static void free_priv(void *obj)
Definition: id3v2.c:686
#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:3911
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1560
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1062
uint8_t * data
Definition: id3v2.h:78
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:81
const char * ff_id3v2_picture_types[21]
Definition: id3v2.c:105
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1583
static unsigned int size_to_syncsafe(unsigned int size)
Definition: id3v2.c:174
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:541
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:129
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:696
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen, AVDictionary **metadata, const char *key)
Parse a text tag.
Definition: id3v2.c:318
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
static void free_geobtag(void *obj)
Free GEOB type extra metadata.
Definition: id3v2.c:219
static uint8_t tmp[8]
Definition: des-test.c:38
static unsigned int get_size(AVIOContext *s, int len)
Definition: id3v2.c:166
static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
Definition: id3v2.c:405
#define ID3v2_FLAG_UNSYNCH
Definition: id3v2.h:38
AVDictionary * metadata
Definition: avformat.h:945
uint8_t * owner
Definition: id3v2.h:77
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:851
static void merge_date(AVDictionary **m)
Definition: id3v2.c:498
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
Definition: aviobuf.c:1252
Stream structure.
Definition: avformat.h:876
const char ff_id3v2_tags[][4]
A list of text information frames allowed in both ID3 v2.3 and v2.4 http://www.id3.org/id3v2.4.0-frames http://www.id3.org/id3v2.4.0-changes.
Definition: id3v2.c:86
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
struct ID3v2ExtraMeta * next
Definition: id3v2.h:58
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:66
AVIOContext * pb
I/O context.
Definition: avformat.h:1361
static void finish(void)
Definition: movenc-test.c:299
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:165
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define ID3v2_FLAG_COMPRESSION
Definition: id3v2.h:40
enum AVCodecID id
Definition: id3v2.h:73
uint8_t * description
Definition: id3v2.h:72
void * buf
Definition: avisynth_c.h:553
GLint GLenum type
Definition: opengl_enc.c:105
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
rational number numerator/denominator
Definition: rational.h:43
#define snprintf
Definition: snprintf.h:34
int size
Size of data in bytes.
Definition: buffer.h:93
static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen, AVDictionary **metadata)
Definition: id3v2.c:357
#define SIZE_SPECIFIER
Definition: internal.h:252
static int flags
Definition: cpu.c:47
static int check_tag(AVIOContext *s, int offset, unsigned int len)
Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error.
Definition: id3v2.c:202
static void rstrip_spaces(char *buf)
Definition: id3v2.c:538
static const ID3v2EMFunc * get_extra_meta_func(const char *tag, int isv34)
Get the corresponding ID3v2EMFunc struct for a tag.
Definition: id3v2.c:753
uint8_t * mime_type
Definition: id3v2.h:63
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:876
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:656
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:499
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:141
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
const char * tag
Definition: id3v2.h:56
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
#define ID3v2_FLAG_ENCRYPTION
Definition: id3v2.h:39
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
const char * tag4
Definition: id3v2.c:733
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata and chapters.
Definition: id3v2.c:1056
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:728
const char ff_id3v2_3_tags[][4]
ID3v2.3-only text information frames.
Definition: id3v2.c:100
uint8_t * file_name
Definition: id3v2.h:64
#define av_free(p)
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1050
char * value
Definition: dict.h:87
int eof_reached
true if eof reached
Definition: avio.h:186
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:154
AVBufferRef * buf
Definition: id3v2.h:70
uint32_t datasize
Definition: id3v2.h:79
void(* free)(void *obj)
Definition: id3v2.c:737
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:553
AVCodecParameters * codecpar
Definition: avformat.h:1006
int avio_get_str(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a string from pb into buf.
Definition: aviobuf.c:728
#define ID3v2_FLAG_DATALEN
Definition: id3v2.h:37
int stream_index
Definition: avcodec.h:1579
#define ID3v1_GENRE_MAX
Definition: id3v1.h:29
const char *const ff_id3v1_genre_str[ID3v1_GENRE_MAX+1]
ID3v1 genres.
Definition: id3v1.c:27
static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:631
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:963
GLuint buffer
Definition: opengl_enc.c:102
#define av_unused
Definition: attributes.h:126
static const AVMetadataConv id3v2_2_metadata_conv[]
Definition: id3v2.c:73