FFmpeg  4.4
id3v2.c
Go to the documentation of this file.
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/bprint.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/intreadwrite.h"
39 #include "libavcodec/png.h"
40 #include "avio_internal.h"
41 #include "internal.h"
42 #include "id3v1.h"
43 #include "id3v2.h"
44 
46  { "TALB", "album" },
47  { "TCOM", "composer" },
48  { "TCON", "genre" },
49  { "TCOP", "copyright" },
50  { "TENC", "encoded_by" },
51  { "TIT2", "title" },
52  { "TLAN", "language" },
53  { "TPE1", "artist" },
54  { "TPE2", "album_artist" },
55  { "TPE3", "performer" },
56  { "TPOS", "disc" },
57  { "TPUB", "publisher" },
58  { "TRCK", "track" },
59  { "TSSE", "encoder" },
60  { "USLT", "lyrics" },
61  { 0 }
62 };
63 
65  { "TCMP", "compilation" },
66  { "TDRC", "date" },
67  { "TDRL", "date" },
68  { "TDEN", "creation_time" },
69  { "TSOA", "album-sort" },
70  { "TSOP", "artist-sort" },
71  { "TSOT", "title-sort" },
72  { 0 }
73 };
74 
76  { "TAL", "album" },
77  { "TCO", "genre" },
78  { "TCP", "compilation" },
79  { "TT2", "title" },
80  { "TEN", "encoded_by" },
81  { "TP1", "artist" },
82  { "TP2", "album_artist" },
83  { "TP3", "performer" },
84  { "TRK", "track" },
85  { 0 }
86 };
87 
88 const char ff_id3v2_tags[][4] = {
89  "TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDLY", "TENC", "TEXT",
90  "TFLT", "TIT1", "TIT2", "TIT3", "TKEY", "TLAN", "TLEN", "TMED",
91  "TOAL", "TOFN", "TOLY", "TOPE", "TOWN", "TPE1", "TPE2", "TPE3",
92  "TPE4", "TPOS", "TPUB", "TRCK", "TRSN", "TRSO", "TSRC", "TSSE",
93  { 0 },
94 };
95 
96 const char ff_id3v2_4_tags[][4] = {
97  "TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
98  "TPRO", "TSOA", "TSOP", "TSOT", "TSST",
99  { 0 },
100 };
101 
102 const char ff_id3v2_3_tags[][4] = {
103  "TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
104  { 0 },
105 };
106 
107 const char * const ff_id3v2_picture_types[21] = {
108  "Other",
109  "32x32 pixels 'file icon'",
110  "Other file icon",
111  "Cover (front)",
112  "Cover (back)",
113  "Leaflet page",
114  "Media (e.g. label side of CD)",
115  "Lead artist/lead performer/soloist",
116  "Artist/performer",
117  "Conductor",
118  "Band/Orchestra",
119  "Composer",
120  "Lyricist/text writer",
121  "Recording Location",
122  "During recording",
123  "During performance",
124  "Movie/video screen capture",
125  "A bright coloured fish",
126  "Illustration",
127  "Band/artist logotype",
128  "Publisher/Studio logotype",
129 };
130 
132  { "image/gif", AV_CODEC_ID_GIF },
133  { "image/jpeg", AV_CODEC_ID_MJPEG },
134  { "image/jpg", AV_CODEC_ID_MJPEG },
135  { "image/png", AV_CODEC_ID_PNG },
136  { "image/tiff", AV_CODEC_ID_TIFF },
137  { "image/bmp", AV_CODEC_ID_BMP },
138  { "JPG", AV_CODEC_ID_MJPEG }, /* ID3v2.2 */
139  { "PNG", AV_CODEC_ID_PNG }, /* ID3v2.2 */
140  { "", AV_CODEC_ID_NONE },
141 };
142 
143 int ff_id3v2_match(const uint8_t *buf, const char *magic)
144 {
145  return buf[0] == magic[0] &&
146  buf[1] == magic[1] &&
147  buf[2] == magic[2] &&
148  buf[3] != 0xff &&
149  buf[4] != 0xff &&
150  (buf[6] & 0x80) == 0 &&
151  (buf[7] & 0x80) == 0 &&
152  (buf[8] & 0x80) == 0 &&
153  (buf[9] & 0x80) == 0;
154 }
155 
156 int ff_id3v2_tag_len(const uint8_t *buf)
157 {
158  int len = ((buf[6] & 0x7f) << 21) +
159  ((buf[7] & 0x7f) << 14) +
160  ((buf[8] & 0x7f) << 7) +
161  (buf[9] & 0x7f) +
163  if (buf[5] & 0x10)
165  return len;
166 }
167 
168 static unsigned int get_size(AVIOContext *s, int len)
169 {
170  int v = 0;
171  while (len--)
172  v = (v << 7) + (avio_r8(s) & 0x7F);
173  return v;
174 }
175 
176 static unsigned int size_to_syncsafe(unsigned int size)
177 {
178  return (((size) & (0x7f << 0)) >> 0) +
179  (((size) & (0x7f << 8)) >> 1) +
180  (((size) & (0x7f << 16)) >> 2) +
181  (((size) & (0x7f << 24)) >> 3);
182 }
183 
184 /* No real verification, only check that the tag consists of
185  * a combination of capital alpha-numerical characters */
186 static int is_tag(const char *buf, unsigned int len)
187 {
188  if (!len)
189  return 0;
190 
191  while (len--)
192  if ((buf[len] < 'A' ||
193  buf[len] > 'Z') &&
194  (buf[len] < '0' ||
195  buf[len] > '9'))
196  return 0;
197 
198  return 1;
199 }
200 
201 /**
202  * Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error
203  */
204 static int check_tag(AVIOContext *s, int offset, unsigned int len)
205 {
206  char tag[4];
207 
208  if (len > 4 ||
209  avio_seek(s, offset, SEEK_SET) < 0 ||
210  avio_read(s, tag, len) < (int)len)
211  return -1;
212  else if (!AV_RB32(tag) || is_tag(tag, len))
213  return 1;
214 
215  return 0;
216 }
217 
218 /**
219  * Free GEOB type extra metadata.
220  */
221 static void free_geobtag(void *obj)
222 {
223  ID3v2ExtraMetaGEOB *geob = obj;
224  av_freep(&geob->mime_type);
225  av_freep(&geob->file_name);
226  av_freep(&geob->description);
227  av_freep(&geob->data);
228 }
229 
230 /**
231  * Decode characters to UTF-8 according to encoding type. The decoded buffer is
232  * always null terminated. Stop reading when either *maxread bytes are read from
233  * pb or U+0000 character is found.
234  *
235  * @param dst Pointer where the address of the buffer with the decoded bytes is
236  * stored. Buffer must be freed by caller.
237  * @param maxread Pointer to maximum number of characters to read from the
238  * AVIOContext. After execution the value is decremented by the number of bytes
239  * actually read.
240  * @returns 0 if no error occurred, dst is uninitialized on error
241  */
242 static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding,
243  uint8_t **dst, int *maxread)
244 {
245  int ret;
246  uint8_t tmp;
247  uint32_t ch = 1;
248  int left = *maxread;
249  unsigned int (*get)(AVIOContext*) = avio_rb16;
250  AVIOContext *dynbuf;
251 
252  if ((ret = avio_open_dyn_buf(&dynbuf)) < 0) {
253  av_log(s, AV_LOG_ERROR, "Error opening memory stream\n");
254  return ret;
255  }
256 
257  switch (encoding) {
259  while (left && ch) {
260  ch = avio_r8(pb);
261  PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
262  left--;
263  }
264  break;
265 
267  if ((left -= 2) < 0) {
268  av_log(s, AV_LOG_ERROR, "Cannot read BOM value, input too short\n");
269  ffio_free_dyn_buf(&dynbuf);
270  *dst = NULL;
271  return AVERROR_INVALIDDATA;
272  }
273  switch (avio_rb16(pb)) {
274  case 0xfffe:
275  get = avio_rl16;
276  case 0xfeff:
277  break;
278  default:
279  av_log(s, AV_LOG_ERROR, "Incorrect BOM value\n");
280  ffio_free_dyn_buf(&dynbuf);
281  *dst = NULL;
282  *maxread = left;
283  return AVERROR_INVALIDDATA;
284  }
285  // fall-through
286 
288  while ((left > 1) && ch) {
289  GET_UTF16(ch, ((left -= 2) >= 0 ? get(pb) : 0), break;)
290  PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
291  }
292  if (left < 0)
293  left += 2; /* did not read last char from pb */
294  break;
295 
296  case ID3v2_ENCODING_UTF8:
297  while (left && ch) {
298  ch = avio_r8(pb);
299  avio_w8(dynbuf, ch);
300  left--;
301  }
302  break;
303  default:
304  av_log(s, AV_LOG_WARNING, "Unknown encoding\n");
305  }
306 
307  if (ch)
308  avio_w8(dynbuf, 0);
309 
310  avio_close_dyn_buf(dynbuf, dst);
311  *maxread = left;
312 
313  return 0;
314 }
315 
316 /**
317  * Parse a text tag.
318  */
319 static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen,
320  AVDictionary **metadata, const char *key)
321 {
322  uint8_t *dst;
323  int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
324  unsigned genre;
325 
326  if (taglen < 1)
327  return;
328 
329  encoding = avio_r8(pb);
330  taglen--; /* account for encoding type byte */
331 
332  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
333  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
334  return;
335  }
336 
337  if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) &&
338  (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) &&
339  genre <= ID3v1_GENRE_MAX) {
340  av_freep(&dst);
341  dst = av_strdup(ff_id3v1_genre_str[genre]);
342  } else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) {
343  /* dst now contains the key, need to get value */
344  key = dst;
345  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
346  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
347  av_freep(&key);
348  return;
349  }
350  dict_flags |= AV_DICT_DONT_STRDUP_KEY;
351  } else if (!*dst)
352  av_freep(&dst);
353 
354  if (dst)
355  av_dict_set(metadata, key, dst, dict_flags);
356 }
357 
358 static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen,
359  AVDictionary **metadata)
360 {
361  uint8_t lang[4];
362  uint8_t *descriptor = NULL; // 'Content descriptor'
363  uint8_t *text;
364  char *key;
365  int encoding;
366  int ok = 0;
367 
368  if (taglen < 1)
369  goto error;
370 
371  encoding = avio_r8(pb);
372  taglen--;
373 
374  if (avio_read(pb, lang, 3) < 3)
375  goto error;
376  lang[3] = '\0';
377  taglen -= 3;
378 
379  if (decode_str(s, pb, encoding, &descriptor, &taglen) < 0)
380  goto error;
381 
382  if (decode_str(s, pb, encoding, &text, &taglen) < 0)
383  goto error;
384 
385  // FFmpeg does not support hierarchical metadata, so concatenate the keys.
386  key = av_asprintf("lyrics-%s%s%s", descriptor[0] ? (char *)descriptor : "",
387  descriptor[0] ? "-" : "",
388  lang);
389  if (!key) {
390  av_free(text);
391  goto error;
392  }
393 
394  av_dict_set(metadata, key, text,
396 
397  ok = 1;
398 error:
399  if (!ok)
400  av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n");
401  av_free(descriptor);
402 }
403 
404 /**
405  * Parse a comment tag.
406  */
407 static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen,
408  AVDictionary **metadata)
409 {
410  const char *key = "comment";
411  uint8_t *dst;
412  int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
413  av_unused int language;
414 
415  if (taglen < 4)
416  return;
417 
418  encoding = avio_r8(pb);
419  language = avio_rl24(pb);
420  taglen -= 4;
421 
422  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
423  av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
424  return;
425  }
426 
427  if (dst && !*dst)
428  av_freep(&dst);
429 
430  if (dst) {
431  key = (const char *) dst;
432  dict_flags |= AV_DICT_DONT_STRDUP_KEY;
433  }
434 
435  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
436  av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
437  if (dict_flags & AV_DICT_DONT_STRDUP_KEY)
438  av_freep((void*)&key);
439  return;
440  }
441 
442  if (dst)
443  av_dict_set(metadata, key, (const char *) dst, dict_flags);
444 }
445 
446 /**
447  * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
448  */
449 static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen,
450  const char *tag, ID3v2ExtraMeta **extra_meta,
451  int isv34)
452 {
453  ID3v2ExtraMetaGEOB *geob_data = NULL;
454  ID3v2ExtraMeta *new_extra = NULL;
455  char encoding;
456  unsigned int len;
457 
458  if (taglen < 1)
459  return;
460 
461  new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
462  if (!new_extra) {
463  av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
464  sizeof(ID3v2ExtraMeta));
465  return;
466  }
467 
468  geob_data = &new_extra->data.geob;
469 
470  /* read encoding type byte */
471  encoding = avio_r8(pb);
472  taglen--;
473 
474  /* read MIME type (always ISO-8859) */
475  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type,
476  &taglen) < 0 ||
477  taglen <= 0)
478  goto fail;
479 
480  /* read file name */
481  if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 ||
482  taglen <= 0)
483  goto fail;
484 
485  /* read content description */
486  if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 ||
487  taglen < 0)
488  goto fail;
489 
490  if (taglen) {
491  /* save encapsulated binary data */
492  geob_data->data = av_malloc(taglen);
493  if (!geob_data->data) {
494  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
495  goto fail;
496  }
497  if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
499  "Error reading GEOB frame, data truncated.\n");
500  geob_data->datasize = len;
501  } else {
502  geob_data->data = NULL;
503  geob_data->datasize = 0;
504  }
505 
506  /* add data to the list */
507  new_extra->tag = "GEOB";
508  new_extra->next = *extra_meta;
509  *extra_meta = new_extra;
510 
511  return;
512 
513 fail:
514  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
515  free_geobtag(geob_data);
516  av_free(new_extra);
517  return;
518 }
519 
520 static int is_number(const char *str)
521 {
522  while (*str >= '0' && *str <= '9')
523  str++;
524  return !*str;
525 }
526 
528 {
530  if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
531  strlen(t->value) == 4 && is_number(t->value))
532  return t;
533  return NULL;
534 }
535 
536 static void merge_date(AVDictionary **m)
537 {
539  char date[17] = { 0 }; // YYYY-MM-DD hh:mm
540 
541  if (!(t = get_date_tag(*m, "TYER")) &&
542  !(t = get_date_tag(*m, "TYE")))
543  return;
544  av_strlcpy(date, t->value, 5);
545  av_dict_set(m, "TYER", NULL, 0);
546  av_dict_set(m, "TYE", NULL, 0);
547 
548  if (!(t = get_date_tag(*m, "TDAT")) &&
549  !(t = get_date_tag(*m, "TDA")))
550  goto finish;
551  snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
552  av_dict_set(m, "TDAT", NULL, 0);
553  av_dict_set(m, "TDA", NULL, 0);
554 
555  if (!(t = get_date_tag(*m, "TIME")) &&
556  !(t = get_date_tag(*m, "TIM")))
557  goto finish;
558  snprintf(date + 10, sizeof(date) - 10,
559  " %.2s:%.2s", t->value, t->value + 2);
560  av_dict_set(m, "TIME", NULL, 0);
561  av_dict_set(m, "TIM", NULL, 0);
562 
563 finish:
564  if (date[0])
565  av_dict_set(m, "date", date, 0);
566 }
567 
568 static void free_apic(void *obj)
569 {
570  ID3v2ExtraMetaAPIC *apic = obj;
571  av_buffer_unref(&apic->buf);
572  av_freep(&apic->description);
573 }
574 
575 static void rstrip_spaces(char *buf)
576 {
577  size_t len = strlen(buf);
578  while (len > 0 && buf[len - 1] == ' ')
579  buf[--len] = 0;
580 }
581 
582 static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen,
583  const char *tag, ID3v2ExtraMeta **extra_meta,
584  int isv34)
585 {
586  int enc, pic_type;
587  char mimetype[64] = {0};
588  const CodecMime *mime = ff_id3v2_mime_tags;
589  enum AVCodecID id = AV_CODEC_ID_NONE;
590  ID3v2ExtraMetaAPIC *apic = NULL;
591  ID3v2ExtraMeta *new_extra = NULL;
592  int64_t end = avio_tell(pb) + taglen;
593 
594  if (taglen <= 4 || (!isv34 && taglen <= 6))
595  goto fail;
596 
597  new_extra = av_mallocz(sizeof(*new_extra));
598  if (!new_extra)
599  goto fail;
600 
601  apic = &new_extra->data.apic;
602 
603  enc = avio_r8(pb);
604  taglen--;
605 
606  /* mimetype */
607  if (isv34) {
608  int ret = avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
609  if (ret < 0 || ret >= taglen)
610  goto fail;
611  taglen -= ret;
612  } else {
613  if (avio_read(pb, mimetype, 3) < 0)
614  goto fail;
615 
616  mimetype[3] = 0;
617  taglen -= 3;
618  }
619 
620  while (mime->id != AV_CODEC_ID_NONE) {
621  if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
622  id = mime->id;
623  break;
624  }
625  mime++;
626  }
627  if (id == AV_CODEC_ID_NONE) {
629  "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
630  goto fail;
631  }
632  apic->id = id;
633 
634  /* picture type */
635  pic_type = avio_r8(pb);
636  taglen--;
637  if (pic_type < 0 || pic_type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
638  av_log(s, AV_LOG_WARNING, "Unknown attached picture type %d.\n",
639  pic_type);
640  pic_type = 0;
641  }
642  apic->type = ff_id3v2_picture_types[pic_type];
643 
644  /* description and picture data */
645  if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
647  "Error decoding attached picture description.\n");
648  goto fail;
649  }
650 
652  if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen)
653  goto fail;
654  memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
655 
656  new_extra->tag = "APIC";
657  new_extra->next = *extra_meta;
658  *extra_meta = new_extra;
659 
660  // The description must be unique, and some ID3v2 tag writers add spaces
661  // to write several APIC entries with the same description.
662  rstrip_spaces(apic->description);
663 
664  return;
665 
666 fail:
667  if (apic)
668  free_apic(apic);
669  av_freep(&new_extra);
670  avio_seek(pb, end, SEEK_SET);
671 }
672 
673 static void free_chapter(void *obj)
674 {
675  ID3v2ExtraMetaCHAP *chap = obj;
676  av_freep(&chap->element_id);
677  av_dict_free(&chap->meta);
678 }
679 
680 static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34)
681 {
682  int taglen;
683  char tag[5];
684  ID3v2ExtraMeta *new_extra = NULL;
685  ID3v2ExtraMetaCHAP *chap = NULL;
686 
687  new_extra = av_mallocz(sizeof(*new_extra));
688  if (!new_extra)
689  return;
690 
691  chap = &new_extra->data.chap;
692 
693  if (decode_str(s, pb, 0, &chap->element_id, &len) < 0)
694  goto fail;
695 
696  if (len < 16)
697  goto fail;
698 
699  chap->start = avio_rb32(pb);
700  chap->end = avio_rb32(pb);
701  avio_skip(pb, 8);
702 
703  len -= 16;
704  while (len > 10) {
705  if (avio_read(pb, tag, 4) < 4)
706  goto fail;
707  tag[4] = 0;
708  taglen = avio_rb32(pb);
709  avio_skip(pb, 2);
710  len -= 10;
711  if (taglen < 0 || taglen > len)
712  goto fail;
713  if (tag[0] == 'T')
714  read_ttag(s, pb, taglen, &chap->meta, tag);
715  else
716  avio_skip(pb, taglen);
717  len -= taglen;
718  }
719 
722 
723  new_extra->tag = "CHAP";
724  new_extra->next = *extra_meta;
725  *extra_meta = new_extra;
726 
727  return;
728 
729 fail:
730  free_chapter(chap);
731  av_freep(&new_extra);
732 }
733 
734 static void free_priv(void *obj)
735 {
736  ID3v2ExtraMetaPRIV *priv = obj;
737  av_freep(&priv->owner);
738  av_freep(&priv->data);
739 }
740 
741 static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen,
742  const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
743 {
744  ID3v2ExtraMeta *meta;
745  ID3v2ExtraMetaPRIV *priv;
746 
747  meta = av_mallocz(sizeof(*meta));
748  if (!meta)
749  return;
750 
751  priv = &meta->data.priv;
752 
753  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0)
754  goto fail;
755 
756  priv->data = av_malloc(taglen);
757  if (!priv->data)
758  goto fail;
759 
760  priv->datasize = taglen;
761 
762  if (avio_read(pb, priv->data, priv->datasize) != priv->datasize)
763  goto fail;
764 
765  meta->tag = "PRIV";
766  meta->next = *extra_meta;
767  *extra_meta = meta;
768 
769  return;
770 
771 fail:
772  free_priv(priv);
773  av_freep(&meta);
774 }
775 
776 typedef struct ID3v2EMFunc {
777  const char *tag3;
778  const char *tag4;
779  void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen,
780  const char *tag, ID3v2ExtraMeta **extra_meta,
781  int isv34);
782  void (*free)(void *obj);
783 } ID3v2EMFunc;
784 
786  { "GEO", "GEOB", read_geobtag, free_geobtag },
787  { "PIC", "APIC", read_apic, free_apic },
788  { "CHAP","CHAP", read_chapter, free_chapter },
789  { "PRIV","PRIV", read_priv, free_priv },
790  { NULL }
791 };
792 
793 /**
794  * Get the corresponding ID3v2EMFunc struct for a tag.
795  * @param isv34 Determines if v2.2 or v2.3/4 strings are used
796  * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
797  */
798 static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
799 {
800  int i = 0;
801  while (id3v2_extra_meta_funcs[i].tag3) {
802  if (tag && !memcmp(tag,
803  (isv34 ? id3v2_extra_meta_funcs[i].tag4 :
804  id3v2_extra_meta_funcs[i].tag3),
805  (isv34 ? 4 : 3)))
806  return &id3v2_extra_meta_funcs[i];
807  i++;
808  }
809  return NULL;
810 }
811 
812 static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
814  uint8_t flags, ID3v2ExtraMeta **extra_meta)
815 {
816  int isv34, unsync;
817  unsigned tlen;
818  char tag[5];
819  int64_t next, end = avio_tell(pb) + len;
820  int taghdrlen;
821  const char *reason = NULL;
822  AVIOContext pb_local;
823  AVIOContext *pbx;
824  unsigned char *buffer = NULL;
825  int buffer_size = 0;
826  const ID3v2EMFunc *extra_func = NULL;
827  unsigned char *uncompressed_buffer = NULL;
828  av_unused int uncompressed_buffer_size = 0;
829  const char *comm_frame;
830 
831  av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
832 
833  switch (version) {
834  case 2:
835  if (flags & 0x40) {
836  reason = "compression";
837  goto error;
838  }
839  isv34 = 0;
840  taghdrlen = 6;
841  comm_frame = "COM";
842  break;
843 
844  case 3:
845  case 4:
846  isv34 = 1;
847  taghdrlen = 10;
848  comm_frame = "COMM";
849  break;
850 
851  default:
852  reason = "version";
853  goto error;
854  }
855 
856  unsync = flags & 0x80;
857 
858  if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */
859  int extlen = get_size(pb, 4);
860  if (version == 4)
861  /* In v2.4 the length includes the length field we just read. */
862  extlen -= 4;
863 
864  if (extlen < 0) {
865  reason = "invalid extended header length";
866  goto error;
867  }
868  avio_skip(pb, extlen);
869  len -= extlen + 4;
870  if (len < 0) {
871  reason = "extended header too long.";
872  goto error;
873  }
874  }
875 
876  while (len >= taghdrlen) {
877  unsigned int tflags = 0;
878  int tunsync = 0;
879  int tcomp = 0;
880  int tencr = 0;
881  unsigned long av_unused dlen;
882 
883  if (isv34) {
884  if (avio_read(pb, tag, 4) < 4)
885  break;
886  tag[4] = 0;
887  if (version == 3) {
888  tlen = avio_rb32(pb);
889  } else {
890  /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
891  * so check the next tag to see which one to use */
892  tlen = avio_rb32(pb);
893  if (tlen > 0x7f) {
894  if (tlen < len) {
895  int64_t cur = avio_tell(pb);
896 
897  if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */))
898  break;
899 
900  if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1)
901  tlen = size_to_syncsafe(tlen);
902  else if (check_tag(pb, cur + 2 + tlen, 4) != 1)
903  break;
904  avio_seek(pb, cur, SEEK_SET);
905  } else
906  tlen = size_to_syncsafe(tlen);
907  }
908  }
909  tflags = avio_rb16(pb);
910  tunsync = tflags & ID3v2_FLAG_UNSYNCH;
911  } else {
912  if (avio_read(pb, tag, 3) < 3)
913  break;
914  tag[3] = 0;
915  tlen = avio_rb24(pb);
916  }
917  if (tlen > (1<<28))
918  break;
919  len -= taghdrlen + tlen;
920 
921  if (len < 0)
922  break;
923 
924  next = avio_tell(pb) + tlen;
925 
926  if (!tlen) {
927  if (tag[0])
928  av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n",
929  tag);
930  continue;
931  }
932 
933  if (tflags & ID3v2_FLAG_DATALEN) {
934  if (tlen < 4)
935  break;
936  dlen = avio_rb32(pb);
937  tlen -= 4;
938  } else
939  dlen = tlen;
940 
941  tcomp = tflags & ID3v2_FLAG_COMPRESSION;
942  tencr = tflags & ID3v2_FLAG_ENCRYPTION;
943 
944  /* skip encrypted tags and, if no zlib, compressed tags */
945  if (tencr || (!CONFIG_ZLIB && tcomp)) {
946  const char *type;
947  if (!tcomp)
948  type = "encrypted";
949  else if (!tencr)
950  type = "compressed";
951  else
952  type = "encrypted and compressed";
953 
954  av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag);
955  avio_skip(pb, tlen);
956  /* check for text tag or supported special meta tag */
957  } else if (tag[0] == 'T' ||
958  !memcmp(tag, "USLT", 4) ||
959  !strcmp(tag, comm_frame) ||
960  (extra_meta &&
961  (extra_func = get_extra_meta_func(tag, isv34)))) {
962  pbx = pb;
963 
964  if (unsync || tunsync || tcomp) {
965  av_fast_malloc(&buffer, &buffer_size, tlen);
966  if (!buffer) {
967  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
968  goto seek;
969  }
970  }
971  if (unsync || tunsync) {
972  uint8_t *b = buffer;
973  uint8_t *t = buffer;
974  uint8_t *end = t + tlen;
975 
976  if (avio_read(pb, buffer, tlen) != tlen) {
977  av_log(s, AV_LOG_ERROR, "Failed to read tag data\n");
978  goto seek;
979  }
980 
981  while (t != end) {
982  *b++ = *t++;
983  if (t != end && t[-1] == 0xff && !t[0])
984  t++;
985  }
986 
987  ffio_init_context(&pb_local, buffer, b - buffer, 0, NULL, NULL, NULL,
988  NULL);
989  tlen = b - buffer;
990  pbx = &pb_local; // read from sync buffer
991  }
992 
993 #if CONFIG_ZLIB
994  if (tcomp) {
995  int err;
996 
997  av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen);
998 
999  if (tlen <= 0)
1000  goto seek;
1001  if (dlen / 32768 > tlen)
1002  goto seek;
1003 
1004  av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen);
1005  if (!uncompressed_buffer) {
1006  av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
1007  goto seek;
1008  }
1009 
1010  if (!(unsync || tunsync)) {
1011  err = avio_read(pb, buffer, tlen);
1012  if (err < 0) {
1013  av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n");
1014  goto seek;
1015  }
1016  tlen = err;
1017  }
1018 
1019  err = uncompress(uncompressed_buffer, &dlen, buffer, tlen);
1020  if (err != Z_OK) {
1021  av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
1022  goto seek;
1023  }
1024  ffio_init_context(&pb_local, uncompressed_buffer, dlen, 0, NULL, NULL, NULL, NULL);
1025  tlen = dlen;
1026  pbx = &pb_local; // read from sync buffer
1027  }
1028 #endif
1029  if (tag[0] == 'T')
1030  /* parse text tag */
1031  read_ttag(s, pbx, tlen, metadata, tag);
1032  else if (!memcmp(tag, "USLT", 4))
1033  read_uslt(s, pbx, tlen, metadata);
1034  else if (!strcmp(tag, comm_frame))
1035  read_comment(s, pbx, tlen, metadata);
1036  else
1037  /* parse special meta tag */
1038  extra_func->read(s, pbx, tlen, tag, extra_meta, isv34);
1039  } else if (!tag[0]) {
1040  if (tag[1])
1041  av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n");
1042  avio_skip(pb, tlen);
1043  break;
1044  }
1045  /* Skip to end of tag */
1046 seek:
1047  avio_seek(pb, next, SEEK_SET);
1048  }
1049 
1050  /* Footer preset, always 10 bytes, skip over it */
1051  if (version == 4 && flags & 0x10)
1052  end += 10;
1053 
1054 error:
1055  if (reason)
1056  av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n",
1057  version, reason);
1058  avio_seek(pb, end, SEEK_SET);
1059  av_free(buffer);
1060  av_free(uncompressed_buffer);
1061  return;
1062 }
1063 
1064 static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata,
1065  AVFormatContext *s, const char *magic,
1066  ID3v2ExtraMeta **extra_meta, int64_t max_search_size)
1067 {
1068  int len, ret;
1070  int found_header;
1071  int64_t start, off;
1072 
1073  if (max_search_size && max_search_size < ID3v2_HEADER_SIZE)
1074  return;
1075 
1076  start = avio_tell(pb);
1077  do {
1078  /* save the current offset in case there's nothing to read/skip */
1079  off = avio_tell(pb);
1080  if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) {
1081  avio_seek(pb, off, SEEK_SET);
1082  break;
1083  }
1084 
1086  if (ret >= 0)
1087  ret = avio_read(pb, buf, ID3v2_HEADER_SIZE);
1088  if (ret != ID3v2_HEADER_SIZE) {
1089  avio_seek(pb, off, SEEK_SET);
1090  break;
1091  }
1092  found_header = ff_id3v2_match(buf, magic);
1093  if (found_header) {
1094  /* parse ID3v2 header */
1095  len = ((buf[6] & 0x7f) << 21) |
1096  ((buf[7] & 0x7f) << 14) |
1097  ((buf[8] & 0x7f) << 7) |
1098  (buf[9] & 0x7f);
1099  id3v2_parse(pb, metadata, s, len, buf[3], buf[5], extra_meta);
1100  } else {
1101  avio_seek(pb, off, SEEK_SET);
1102  }
1103  } while (found_header);
1107  merge_date(metadata);
1108 }
1109 
1111  const char *magic, ID3v2ExtraMeta **extra_meta)
1112 {
1113  id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0);
1114 }
1115 
1116 void ff_id3v2_read(AVFormatContext *s, const char *magic,
1117  ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
1118 {
1119  id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size);
1120 }
1121 
1123 {
1124  ID3v2ExtraMeta *current = *extra_meta, *next;
1125  const ID3v2EMFunc *extra_func;
1126 
1127  while (current) {
1128  if ((extra_func = get_extra_meta_func(current->tag, 1)))
1129  extra_func->free(&current->data);
1130  next = current->next;
1131  av_freep(&current);
1132  current = next;
1133  }
1134 
1135  *extra_meta = NULL;
1136 }
1137 
1139 {
1140  ID3v2ExtraMeta *cur;
1141 
1142  for (cur = extra_meta; cur; cur = cur->next) {
1143  ID3v2ExtraMetaAPIC *apic;
1144  AVStream *st;
1145 
1146  if (strcmp(cur->tag, "APIC"))
1147  continue;
1148  apic = &cur->data.apic;
1149 
1150  if (!(st = avformat_new_stream(s, NULL)))
1151  return AVERROR(ENOMEM);
1152 
1155  st->codecpar->codec_id = apic->id;
1156 
1157  if (AV_RB64(apic->buf->data) == PNGSIG)
1159 
1160  if (apic->description[0])
1161  av_dict_set(&st->metadata, "title", apic->description, 0);
1162 
1163  av_dict_set(&st->metadata, "comment", apic->type, 0);
1164 
1166  st->attached_pic.buf = apic->buf;
1167  st->attached_pic.data = apic->buf->data;
1169  st->attached_pic.stream_index = st->index;
1171 
1172  apic->buf = NULL;
1173  }
1174 
1175  return 0;
1176 }
1177 
1179 {
1180  int ret = 0;
1181  ID3v2ExtraMeta *cur;
1182  AVRational time_base = {1, 1000};
1183  ID3v2ExtraMetaCHAP **chapters = NULL;
1184  int num_chapters = 0;
1185  int i;
1186 
1187  // since extra_meta is a linked list where elements are prepended,
1188  // we need to reverse the order of chapters
1189  for (cur = extra_meta; cur; cur = cur->next) {
1190  ID3v2ExtraMetaCHAP *chap;
1191 
1192  if (strcmp(cur->tag, "CHAP"))
1193  continue;
1194  chap = &cur->data.chap;
1195 
1196  if ((ret = av_dynarray_add_nofree(&chapters, &num_chapters, chap)) < 0)
1197  goto end;
1198  }
1199 
1200  for (i = 0; i < (num_chapters / 2); i++) {
1201  ID3v2ExtraMetaCHAP *right;
1202  int right_index;
1203 
1204  right_index = (num_chapters - 1) - i;
1205  right = chapters[right_index];
1206 
1207  chapters[right_index] = chapters[i];
1208  chapters[i] = right;
1209  }
1210 
1211  for (i = 0; i < num_chapters; i++) {
1212  ID3v2ExtraMetaCHAP *chap;
1213  AVChapter *chapter;
1214 
1215  chap = chapters[i];
1216  chapter = avpriv_new_chapter(s, i, time_base, chap->start, chap->end, chap->element_id);
1217  if (!chapter)
1218  continue;
1219 
1220  if ((ret = av_dict_copy(&chapter->metadata, chap->meta, 0)) < 0)
1221  goto end;
1222  }
1223 
1224 end:
1225  av_freep(&chapters);
1226  return ret;
1227 }
1228 
1230 {
1231  ID3v2ExtraMeta *cur;
1233 
1234  for (cur = extra_meta; cur; cur = cur->next) {
1235  if (!strcmp(cur->tag, "PRIV")) {
1236  ID3v2ExtraMetaPRIV *priv = &cur->data.priv;
1237  AVBPrint bprint;
1238  char *escaped, *key;
1239  int i, ret;
1240 
1241  if ((key = av_asprintf(ID3v2_PRIV_METADATA_PREFIX "%s", priv->owner)) == NULL) {
1242  return AVERROR(ENOMEM);
1243  }
1244 
1245  av_bprint_init(&bprint, priv->datasize + 1, AV_BPRINT_SIZE_UNLIMITED);
1246 
1247  for (i = 0; i < priv->datasize; i++) {
1248  if (priv->data[i] < 32 || priv->data[i] > 126 || priv->data[i] == '\\') {
1249  av_bprintf(&bprint, "\\x%02x", priv->data[i]);
1250  } else {
1251  av_bprint_chars(&bprint, priv->data[i], 1);
1252  }
1253  }
1254 
1255  if ((ret = av_bprint_finalize(&bprint, &escaped)) < 0) {
1256  av_free(key);
1257  return ret;
1258  }
1259 
1260  if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) {
1261  return ret;
1262  }
1263  }
1264  }
1265 
1266  return 0;
1267 }
1268 
1270 {
1271  return ff_id3v2_parse_priv_dict(&s->metadata, extra_meta);
1272 }
#define av_unused
Definition: attributes.h:131
uint8_t
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:841
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:203
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:766
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:734
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1424
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
int avio_get_str(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a string from pb into buf.
Definition: aviobuf.c:860
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:742
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1379
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:774
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:781
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:624
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
Definition: aviobuf.c:1454
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:998
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:88
#define AV_RB32
Definition: intreadwrite.h:130
#define AV_RB64
Definition: intreadwrite.h:164
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
void av_bprint_chars(AVBPrint *buf, char c, unsigned n)
Append char c n times to a print buffer.
Definition: bprint.c:140
#define AV_BPRINT_SIZE_UNLIMITED
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
#define fail()
Definition: checkasm.h:133
#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:524
#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:552
#define CONFIG_ZLIB
Definition: config.h:530
#define NULL
Definition: coverity.c:32
Public dictionary API.
enum AVCodecID id
int
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
@ AV_CODEC_ID_PNG
Definition: codec_id.h:110
@ AV_CODEC_ID_GIF
Definition: codec_id.h:146
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
@ AV_CODEC_ID_TIFF
Definition: codec_id.h:145
@ AV_CODEC_ID_BMP
Definition: codec_id.h:127
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
#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
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:634
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4505
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
AVBufferRef * av_buffer_alloc(buffer_size_t size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
#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:74
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
#define AV_DICT_DONT_OVERWRITE
Don't overwrite existing entries.
Definition: dict.h:76
#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:72
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
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:40
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:296
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:502
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
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:225
cl_device_type type
const char * key
const char *const ff_id3v1_genre_str[ID3v1_GENRE_MAX+1]
ID3v1 genres.
Definition: id3v1.c:27
#define ID3v1_GENRE_MAX
Definition: id3v1.h:29
const char ff_id3v2_3_tags[][4]
ID3v2.3-only text information frames.
Definition: id3v2.c:102
static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:741
static const ID3v2EMFunc * get_extra_meta_func(const char *tag, int isv34)
Get the corresponding ID3v2EMFunc struct for a tag.
Definition: id3v2.c:798
static void free_apic(void *obj)
Definition: id3v2.c:568
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:1116
const AVMetadataConv ff_id3v2_34_metadata_conv[]
Definition: id3v2.c:45
static unsigned int size_to_syncsafe(unsigned int size)
Definition: id3v2.c:176
static void free_priv(void *obj)
Definition: id3v2.c:734
static const ID3v2EMFunc id3v2_extra_meta_funcs[]
Definition: id3v2.c:785
const char ff_id3v2_4_tags[][4]
ID3v2.4-only text information frames.
Definition: id3v2.c:96
static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:582
static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen, AVDictionary **metadata)
Definition: id3v2.c:358
static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:680
const AVMetadataConv ff_id3v2_4_metadata_conv[]
Definition: id3v2.c:64
static const AVMetadataConv id3v2_2_metadata_conv[]
Definition: id3v2.c:75
static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata, AVFormatContext *s, int len, uint8_t version, uint8_t flags, ID3v2ExtraMeta **extra_meta)
Definition: id3v2.c:812
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen, AVDictionary **metadata)
Parse a comment tag.
Definition: id3v2.c:407
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:107
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:143
static void rstrip_spaces(char *buf)
Definition: id3v2.c:575
static unsigned int get_size(AVIOContext *s, int len)
Definition: id3v2.c:168
static void merge_date(AVDictionary **m)
Definition: id3v2.c:536
static int is_number(const char *str)
Definition: id3v2.c:520
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:449
static AVDictionaryEntry * get_date_tag(AVDictionary *m, const char *tag)
Definition: id3v2.c:527
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1122
static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen, AVDictionary **metadata, const char *key)
Parse a text tag.
Definition: id3v2.c:319
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:1064
static int is_tag(const char *buf, unsigned int len)
Definition: id3v2.c:186
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:242
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1229
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:1138
static void free_geobtag(void *obj)
Free GEOB type extra metadata.
Definition: id3v2.c:221
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1269
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1178
const char ff_id3v2_tags[][4]
A list of text information frames allowed in both ID3 v2.3 and v2.4 http://www.id3....
Definition: id3v2.c:88
static void free_chapter(void *obj)
Definition: id3v2.c:673
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:131
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:204
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:1110
#define ID3v2_FLAG_COMPRESSION
Definition: id3v2.h:40
#define ID3v2_FLAG_ENCRYPTION
Definition: id3v2.h:39
#define ID3v2_PRIV_METADATA_PREFIX
Definition: id3v2.h:42
#define ID3v2_FLAG_UNSYNCH
Definition: id3v2.h:38
@ ID3v2_ENCODING_UTF8
Definition: id3v2.h:48
@ ID3v2_ENCODING_UTF16BOM
Definition: id3v2.h:46
@ ID3v2_ENCODING_UTF16BE
Definition: id3v2.h:47
@ ID3v2_ENCODING_ISO8859
Definition: id3v2.h:45
#define ID3v2_FLAG_DATALEN
Definition: id3v2.h:37
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
int i
Definition: input.c:407
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:4635
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
common internal API header
#define SIZE_SPECIFIER
Definition: internal.h:193
version
Definition: libkvazaar.c:320
uint32_t tag
Definition: movenc.c:1600
#define PNGSIG
Definition: png.h:49
static void get(uint8_t *pixels, int stride, int16_t *block)
typedef void(RENAME(mix_any_func_type))
static char buffer[20]
Definition: seek.c:32
#define FF_ARRAY_ELEMS(a)
#define snprintf
Definition: snprintf.h:34
int size
Size of data in bytes.
Definition: buffer.h:97
uint8_t * data
The data buffer.
Definition: buffer.h:92
AVDictionary * metadata
Definition: avformat.h:1193
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
char * value
Definition: dict.h:83
Format I/O context.
Definition: avformat.h:1232
Bytestream IO Context.
Definition: avio.h:161
int stream_index
Definition: packet.h:371
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:352
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
Rational number (pair of numerator and denominator).
Definition: rational.h:58
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
AVDictionary * metadata
Definition: avformat.h:937
int index
stream index in AVFormatContext
Definition: avformat.h:874
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:955
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:926
char str[32]
Definition: internal.h:48
enum AVCodecID id
Definition: internal.h:49
const char * tag4
Definition: id3v2.c:778
const char * tag3
Definition: id3v2.c:777
void(* free)(void *obj)
Definition: id3v2.c:782
void(* read)(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:779
const char * type
Definition: id3v2.h:67
AVBufferRef * buf
Definition: id3v2.h:66
uint8_t * description
Definition: id3v2.h:68
enum AVCodecID id
Definition: id3v2.h:69
uint32_t end
Definition: id3v2.h:80
uint8_t * element_id
Definition: id3v2.h:79
uint32_t start
Definition: id3v2.h:80
AVDictionary * meta
Definition: id3v2.h:81
uint32_t datasize
Definition: id3v2.h:58
uint8_t * data
Definition: id3v2.h:62
uint8_t * file_name
Definition: id3v2.h:60
uint8_t * mime_type
Definition: id3v2.h:59
uint8_t * description
Definition: id3v2.h:61
uint8_t * data
Definition: id3v2.h:74
uint32_t datasize
Definition: id3v2.h:75
uint8_t * owner
Definition: id3v2.h:73
ID3v2ExtraMetaCHAP chap
Definition: id3v2.h:89
ID3v2ExtraMetaGEOB geob
Definition: id3v2.h:90
ID3v2ExtraMetaPRIV priv
Definition: id3v2.h:91
ID3v2ExtraMetaAPIC apic
Definition: id3v2.h:88
union ID3v2ExtraMeta::@258 data
const char * tag
Definition: id3v2.h:85
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
#define av_free(p)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
static void error(const char *err)
static uint8_t tmp[11]
Definition: aes_ctr.c:27
static void finish(void)
Definition: movenc.c:342
int size
const char * b
Definition: vf_curves.c:118
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
int len