2 * Copyright (c) 2003 Fabrice Bellard
4 * This file is part of FFmpeg.
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.
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.
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
25 * Specifications available at:
26 * http://id3.org/Developer_Information
35 #include "libavutil/avstring.h"
36 #include "libavutil/dict.h"
37 #include "libavutil/intreadwrite.h"
38 #include "avio_internal.h"
43 const AVMetadataConv ff_id3v2_34_metadata_conv
[] = {
45 { "TCOM", "composer" },
47 { "TCOP", "copyright" },
48 { "TENC", "encoded_by" },
50 { "TLAN", "language" },
52 { "TPE2", "album_artist" },
53 { "TPE3", "performer" },
55 { "TPUB", "publisher" },
57 { "TSSE", "encoder" },
61 const AVMetadataConv ff_id3v2_4_metadata_conv
[] = {
62 { "TCMP", "compilation" },
65 { "TDEN", "creation_time" },
66 { "TSOA", "album-sort" },
67 { "TSOP", "artist-sort" },
68 { "TSOT", "title-sort" },
72 static const AVMetadataConv id3v2_2_metadata_conv
[] = {
75 { "TCP", "compilation" },
77 { "TEN", "encoded_by" },
79 { "TP2", "album_artist" },
80 { "TP3", "performer" },
85 const char ff_id3v2_tags
[][4] = {
86 "TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDLY", "TENC", "TEXT",
87 "TFLT", "TIT1", "TIT2", "TIT3", "TKEY", "TLAN", "TLEN", "TMED",
88 "TOAL", "TOFN", "TOLY", "TOPE", "TOWN", "TPE1", "TPE2", "TPE3",
89 "TPE4", "TPOS", "TPUB", "TRCK", "TRSN", "TRSO", "TSRC", "TSSE",
93 const char ff_id3v2_4_tags
[][4] = {
94 "TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
95 "TPRO", "TSOA", "TSOP", "TSOT", "TSST",
99 const char ff_id3v2_3_tags
[][4] = {
100 "TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
104 const char *ff_id3v2_picture_types
[21] = {
106 "32x32 pixels 'file icon'",
111 "Media (e.g. label side of CD)",
112 "Lead artist/lead performer/soloist",
117 "Lyricist/text writer",
118 "Recording Location",
120 "During performance",
121 "Movie/video screen capture",
122 "A bright coloured fish",
124 "Band/artist logotype",
125 "Publisher/Studio logotype",
128 const CodecMime ff_id3v2_mime_tags
[] = {
129 { "image/gif", AV_CODEC_ID_GIF
},
130 { "image/jpeg", AV_CODEC_ID_MJPEG
},
131 { "image/jpg", AV_CODEC_ID_MJPEG
},
132 { "image/png", AV_CODEC_ID_PNG
},
133 { "image/tiff", AV_CODEC_ID_TIFF
},
134 { "image/bmp", AV_CODEC_ID_BMP
},
135 { "JPG", AV_CODEC_ID_MJPEG
}, /* ID3v2.2 */
136 { "PNG", AV_CODEC_ID_PNG
}, /* ID3v2.2 */
137 { "", AV_CODEC_ID_NONE
},
140 int ff_id3v2_match(const uint8_t *buf
, const char *magic
)
142 return buf
[0] == magic
[0] &&
143 buf
[1] == magic
[1] &&
144 buf
[2] == magic
[2] &&
147 (buf
[6] & 0x80) == 0 &&
148 (buf
[7] & 0x80) == 0 &&
149 (buf
[8] & 0x80) == 0 &&
150 (buf
[9] & 0x80) == 0;
153 int ff_id3v2_tag_len(const uint8_t *buf
)
155 int len
= ((buf
[6] & 0x7f) << 21) +
156 ((buf
[7] & 0x7f) << 14) +
157 ((buf
[8] & 0x7f) << 7) +
161 len
+= ID3v2_HEADER_SIZE
;
165 static unsigned int get_size(AVIOContext
*s
, int len
)
169 v
= (v
<< 7) + (avio_r8(s
) & 0x7F);
173 static unsigned int size_to_syncsafe(unsigned int size
)
175 return (((size
) & (0x7f << 0)) >> 0) +
176 (((size
) & (0x7f << 8)) >> 1) +
177 (((size
) & (0x7f << 16)) >> 2) +
178 (((size
) & (0x7f << 24)) >> 3);
181 /* No real verification, only check that the tag consists of
182 * a combination of capital alpha-numerical characters */
183 static int is_tag(const char *buf
, unsigned int len
)
189 if ((buf
[len
] < 'A' ||
199 * Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error
201 static int check_tag(AVIOContext
*s
, int offset
, unsigned int len
)
206 avio_seek(s
, offset
, SEEK_SET
) < 0 ||
207 avio_read(s
, tag
, len
) < len
)
209 else if (!AV_RB32(tag
) || is_tag(tag
, len
))
216 * Free GEOB type extra metadata.
218 static void free_geobtag(void *obj
)
220 ID3v2ExtraMetaGEOB
*geob
= obj
;
221 av_free(geob
->mime_type
);
222 av_free(geob
->file_name
);
223 av_free(geob
->description
);
229 * Decode characters to UTF-8 according to encoding type. The decoded buffer is
230 * always null terminated. Stop reading when either *maxread bytes are read from
231 * pb or U+0000 character is found.
233 * @param dst Pointer where the address of the buffer with the decoded bytes is
234 * stored. Buffer must be freed by caller.
235 * @param maxread Pointer to maximum number of characters to read from the
236 * AVIOContext. After execution the value is decremented by the number of bytes
238 * @returns 0 if no error occurred, dst is uninitialized on error
240 static int decode_str(AVFormatContext
*s
, AVIOContext
*pb
, int encoding
,
241 uint8_t **dst
, int *maxread
)
247 unsigned int (*get
)(AVIOContext
*) = avio_rb16
;
250 if ((ret
= avio_open_dyn_buf(&dynbuf
)) < 0) {
251 av_log(s
, AV_LOG_ERROR
, "Error opening memory stream\n");
256 case ID3v2_ENCODING_ISO8859
:
259 PUT_UTF8(ch
, tmp
, avio_w8(dynbuf
, tmp
);)
264 case ID3v2_ENCODING_UTF16BOM
:
265 if ((left
-= 2) < 0) {
266 av_log(s
, AV_LOG_ERROR
, "Cannot read BOM value, input too short\n");
267 avio_close_dyn_buf(dynbuf
, dst
);
269 return AVERROR_INVALIDDATA
;
271 switch (avio_rb16(pb
)) {
277 av_log(s
, AV_LOG_ERROR
, "Incorrect BOM value\n");
278 avio_close_dyn_buf(dynbuf
, dst
);
281 return AVERROR_INVALIDDATA
;
285 case ID3v2_ENCODING_UTF16BE
:
286 while ((left
> 1) && ch
) {
287 GET_UTF16(ch
, ((left
-= 2) >= 0 ? get(pb
) : 0), break;)
288 PUT_UTF8(ch
, tmp
, avio_w8(dynbuf
, tmp
);)
291 left
+= 2; /* did not read last char from pb */
294 case ID3v2_ENCODING_UTF8
:
302 av_log(s
, AV_LOG_WARNING
, "Unknown encoding\n");
308 avio_close_dyn_buf(dynbuf
, dst
);
317 static void read_ttag(AVFormatContext
*s
, AVIOContext
*pb
, int taglen
,
318 AVDictionary
**metadata
, const char *key
)
321 int encoding
, dict_flags
= AV_DICT_DONT_OVERWRITE
| AV_DICT_DONT_STRDUP_VAL
;
327 encoding
= avio_r8(pb
);
328 taglen
--; /* account for encoding type byte */
330 if (decode_str(s
, pb
, encoding
, &dst
, &taglen
) < 0) {
331 av_log(s
, AV_LOG_ERROR
, "Error reading frame %s, skipped\n", key
);
335 if (!(strcmp(key
, "TCON") && strcmp(key
, "TCO")) &&
336 (sscanf(dst
, "(%d)", &genre
) == 1 || sscanf(dst
, "%d", &genre
) == 1) &&
337 genre
<= ID3v1_GENRE_MAX
) {
339 dst
= av_strdup(ff_id3v1_genre_str
[genre
]);
340 } else if (!(strcmp(key
, "TXXX") && strcmp(key
, "TXX"))) {
341 /* dst now contains the key, need to get value */
343 if (decode_str(s
, pb
, encoding
, &dst
, &taglen
) < 0) {
344 av_log(s
, AV_LOG_ERROR
, "Error reading frame %s, skipped\n", key
);
348 dict_flags
|= AV_DICT_DONT_STRDUP_KEY
;
353 av_dict_set(metadata
, key
, dst
, dict_flags
);
357 * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
359 static void read_geobtag(AVFormatContext
*s
, AVIOContext
*pb
, int taglen
,
360 char *tag
, ID3v2ExtraMeta
**extra_meta
, int isv34
)
362 ID3v2ExtraMetaGEOB
*geob_data
= NULL
;
363 ID3v2ExtraMeta
*new_extra
= NULL
;
370 geob_data
= av_mallocz(sizeof(ID3v2ExtraMetaGEOB
));
372 av_log(s
, AV_LOG_ERROR
, "Failed to alloc %"SIZE_SPECIFIER
" bytes\n",
373 sizeof(ID3v2ExtraMetaGEOB
));
377 new_extra
= av_mallocz(sizeof(ID3v2ExtraMeta
));
379 av_log(s
, AV_LOG_ERROR
, "Failed to alloc %"SIZE_SPECIFIER
" bytes\n",
380 sizeof(ID3v2ExtraMeta
));
384 /* read encoding type byte */
385 encoding
= avio_r8(pb
);
388 /* read MIME type (always ISO-8859) */
389 if (decode_str(s
, pb
, ID3v2_ENCODING_ISO8859
, &geob_data
->mime_type
,
395 if (decode_str(s
, pb
, encoding
, &geob_data
->file_name
, &taglen
) < 0 ||
399 /* read content description */
400 if (decode_str(s
, pb
, encoding
, &geob_data
->description
, &taglen
) < 0 ||
405 /* save encapsulated binary data */
406 geob_data
->data
= av_malloc(taglen
);
407 if (!geob_data
->data
) {
408 av_log(s
, AV_LOG_ERROR
, "Failed to alloc %d bytes\n", taglen
);
411 if ((len
= avio_read(pb
, geob_data
->data
, taglen
)) < taglen
)
412 av_log(s
, AV_LOG_WARNING
,
413 "Error reading GEOB frame, data truncated.\n");
414 geob_data
->datasize
= len
;
416 geob_data
->data
= NULL
;
417 geob_data
->datasize
= 0;
420 /* add data to the list */
421 new_extra
->tag
= "GEOB";
422 new_extra
->data
= geob_data
;
423 new_extra
->next
= *extra_meta
;
424 *extra_meta
= new_extra
;
429 av_log(s
, AV_LOG_ERROR
, "Error reading frame %s, skipped\n", tag
);
430 free_geobtag(geob_data
);
435 static int is_number(const char *str
)
437 while (*str
>= '0' && *str
<= '9')
442 static AVDictionaryEntry
*get_date_tag(AVDictionary
*m
, const char *tag
)
444 AVDictionaryEntry
*t
;
445 if ((t
= av_dict_get(m
, tag
, NULL
, AV_DICT_MATCH_CASE
)) &&
446 strlen(t
->value
) == 4 && is_number(t
->value
))
451 static void merge_date(AVDictionary
**m
)
453 AVDictionaryEntry
*t
;
454 char date
[17] = { 0 }; // YYYY-MM-DD hh:mm
456 if (!(t
= get_date_tag(*m
, "TYER")) &&
457 !(t
= get_date_tag(*m
, "TYE")))
459 av_strlcpy(date
, t
->value
, 5);
460 av_dict_set(m
, "TYER", NULL
, 0);
461 av_dict_set(m
, "TYE", NULL
, 0);
463 if (!(t
= get_date_tag(*m
, "TDAT")) &&
464 !(t
= get_date_tag(*m
, "TDA")))
466 snprintf(date
+ 4, sizeof(date
) - 4, "-%.2s-%.2s", t
->value
+ 2, t
->value
);
467 av_dict_set(m
, "TDAT", NULL
, 0);
468 av_dict_set(m
, "TDA", NULL
, 0);
470 if (!(t
= get_date_tag(*m
, "TIME")) &&
471 !(t
= get_date_tag(*m
, "TIM")))
473 snprintf(date
+ 10, sizeof(date
) - 10,
474 " %.2s:%.2s", t
->value
, t
->value
+ 2);
475 av_dict_set(m
, "TIME", NULL
, 0);
476 av_dict_set(m
, "TIM", NULL
, 0);
480 av_dict_set(m
, "date", date
, 0);
483 static void free_apic(void *obj
)
485 ID3v2ExtraMetaAPIC
*apic
= obj
;
486 av_buffer_unref(&apic
->buf
);
487 av_freep(&apic
->description
);
491 static void read_apic(AVFormatContext
*s
, AVIOContext
*pb
, int taglen
,
492 char *tag
, ID3v2ExtraMeta
**extra_meta
, int isv34
)
496 const CodecMime
*mime
= ff_id3v2_mime_tags
;
497 enum AVCodecID id
= AV_CODEC_ID_NONE
;
498 ID3v2ExtraMetaAPIC
*apic
= NULL
;
499 ID3v2ExtraMeta
*new_extra
= NULL
;
500 int64_t end
= avio_tell(pb
) + taglen
;
505 new_extra
= av_mallocz(sizeof(*new_extra
));
506 apic
= av_mallocz(sizeof(*apic
));
507 if (!new_extra
|| !apic
)
515 taglen
-= avio_get_str(pb
, taglen
, mimetype
, sizeof(mimetype
));
517 avio_read(pb
, mimetype
, 3);
520 while (mime
->id
!= AV_CODEC_ID_NONE
) {
521 if (!av_strncasecmp(mime
->str
, mimetype
, sizeof(mimetype
))) {
527 if (id
== AV_CODEC_ID_NONE
) {
528 av_log(s
, AV_LOG_WARNING
,
529 "Unknown attached picture mimetype: %s, skipping.\n", mimetype
);
535 pic_type
= avio_r8(pb
);
537 if (pic_type
< 0 || pic_type
>= FF_ARRAY_ELEMS(ff_id3v2_picture_types
)) {
538 av_log(s
, AV_LOG_WARNING
, "Unknown attached picture type %d.\n",
542 apic
->type
= ff_id3v2_picture_types
[pic_type
];
544 /* description and picture data */
545 if (decode_str(s
, pb
, enc
, &apic
->description
, &taglen
) < 0) {
546 av_log(s
, AV_LOG_ERROR
,
547 "Error decoding attached picture description.\n");
551 apic
->buf
= av_buffer_alloc(taglen
+ FF_INPUT_BUFFER_PADDING_SIZE
);
552 if (!apic
->buf
|| !taglen
|| avio_read(pb
, apic
->buf
->data
, taglen
) != taglen
)
554 memset(apic
->buf
->data
+ taglen
, 0, FF_INPUT_BUFFER_PADDING_SIZE
);
556 new_extra
->tag
= "APIC";
557 new_extra
->data
= apic
;
558 new_extra
->next
= *extra_meta
;
559 *extra_meta
= new_extra
;
566 av_freep(&new_extra
);
567 avio_seek(pb
, end
, SEEK_SET
);
570 static void read_chapter(AVFormatContext
*s
, AVIOContext
*pb
, int len
, char *ttag
, ID3v2ExtraMeta
**extra_meta
, int isv34
)
572 AVRational time_base
= {1, 1000};
580 /* We should probably just put the chapter data to extra_meta here
581 * and do the AVFormatContext-needing part in a separate
582 * ff_id3v2_parse_apic()-like function. */
583 av_log(NULL
, AV_LOG_DEBUG
, "No AVFormatContext, skipped ID3 chapter data\n");
587 if (decode_str(s
, pb
, 0, &dst
, &len
) < 0)
592 start
= avio_rb32(pb
);
596 chapter
= avpriv_new_chapter(s
, s
->nb_chapters
+ 1, time_base
, start
, end
, dst
);
604 if (avio_read(pb
, tag
, 4) < 4)
607 taglen
= avio_rb32(pb
);
610 if (taglen
< 0 || taglen
> len
)
613 read_ttag(s
, pb
, taglen
, &chapter
->metadata
, tag
);
615 avio_skip(pb
, taglen
);
619 ff_metadata_conv(&chapter
->metadata
, NULL
, ff_id3v2_34_metadata_conv
);
620 ff_metadata_conv(&chapter
->metadata
, NULL
, ff_id3v2_4_metadata_conv
);
625 static void free_priv(void *obj
)
627 ID3v2ExtraMetaPRIV
*priv
= obj
;
628 av_freep(&priv
->owner
);
629 av_freep(&priv
->data
);
633 static void read_priv(AVFormatContext
*s
, AVIOContext
*pb
, int taglen
,
634 char *tag
, ID3v2ExtraMeta
**extra_meta
, int isv34
)
636 ID3v2ExtraMeta
*meta
;
637 ID3v2ExtraMetaPRIV
*priv
;
639 meta
= av_mallocz(sizeof(*meta
));
640 priv
= av_mallocz(sizeof(*priv
));
645 if (decode_str(s
, pb
, ID3v2_ENCODING_ISO8859
, &priv
->owner
, &taglen
) < 0)
648 priv
->data
= av_malloc(taglen
);
652 priv
->datasize
= taglen
;
654 if (avio_read(pb
, priv
->data
, priv
->datasize
) != priv
->datasize
)
659 meta
->next
= *extra_meta
;
670 typedef struct ID3v2EMFunc
{
673 void (*read
)(AVFormatContext
*, AVIOContext
*, int, char *,
674 ID3v2ExtraMeta
**, int isv34
);
675 void (*free
)(void *obj
);
678 static const ID3v2EMFunc id3v2_extra_meta_funcs
[] = {
679 { "GEO", "GEOB", read_geobtag
, free_geobtag
},
680 { "PIC", "APIC", read_apic
, free_apic
},
681 { "CHAP","CHAP", read_chapter
, NULL
},
682 { "PRIV","PRIV", read_priv
, free_priv
},
687 * Get the corresponding ID3v2EMFunc struct for a tag.
688 * @param isv34 Determines if v2.2 or v2.3/4 strings are used
689 * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
691 static const ID3v2EMFunc
*get_extra_meta_func(const char *tag
, int isv34
)
694 while (id3v2_extra_meta_funcs
[i
].tag3
) {
695 if (tag
&& !memcmp(tag
,
696 (isv34
? id3v2_extra_meta_funcs
[i
].tag4
:
697 id3v2_extra_meta_funcs
[i
].tag3
),
699 return &id3v2_extra_meta_funcs
[i
];
705 static void id3v2_parse(AVIOContext
*pb
, AVDictionary
**metadata
,
706 AVFormatContext
*s
, int len
, uint8_t version
,
707 uint8_t flags
, ID3v2ExtraMeta
**extra_meta
)
712 int64_t next
, end
= avio_tell(pb
) + len
;
714 const char *reason
= NULL
;
715 AVIOContext pb_local
;
717 unsigned char *buffer
= NULL
;
719 const ID3v2EMFunc
*extra_func
= NULL
;
720 unsigned char *uncompressed_buffer
= NULL
;
721 av_unused
int uncompressed_buffer_size
= 0;
723 av_log(s
, AV_LOG_DEBUG
, "id3v2 ver:%d flags:%02X len:%d\n", version
, flags
, len
);
728 reason
= "compression";
746 unsync
= flags
& 0x80;
748 if (isv34
&& flags
& 0x40) { /* Extended header present, just skip over it */
749 int extlen
= get_size(pb
, 4);
751 /* In v2.4 the length includes the length field we just read. */
755 reason
= "invalid extended header length";
758 avio_skip(pb
, extlen
);
761 reason
= "extended header too long.";
766 while (len
>= taghdrlen
) {
767 unsigned int tflags
= 0;
771 unsigned long av_unused dlen
;
774 if (avio_read(pb
, tag
, 4) < 4)
778 tlen
= avio_rb32(pb
);
780 /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
781 * so check the next tag to see which one to use */
782 tlen
= avio_rb32(pb
);
785 int64_t cur
= avio_tell(pb
);
787 if (ffio_ensure_seekback(pb
, 2 /* tflags */ + tlen
+ 4 /* next tag */))
790 if (check_tag(pb
, cur
+ 2 + size_to_syncsafe(tlen
), 4) == 1)
791 tlen
= size_to_syncsafe(tlen
);
792 else if (check_tag(pb
, cur
+ 2 + tlen
, 4) != 1)
794 avio_seek(pb
, cur
, SEEK_SET
);
796 tlen
= size_to_syncsafe(tlen
);
799 tflags
= avio_rb16(pb
);
800 tunsync
= tflags
& ID3v2_FLAG_UNSYNCH
;
802 if (avio_read(pb
, tag
, 3) < 3)
805 tlen
= avio_rb24(pb
);
809 len
-= taghdrlen
+ tlen
;
814 next
= avio_tell(pb
) + tlen
;
818 av_log(s
, AV_LOG_DEBUG
, "Invalid empty frame %s, skipping.\n",
823 if (tflags
& ID3v2_FLAG_DATALEN
) {
826 dlen
= avio_rb32(pb
);
831 tcomp
= tflags
& ID3v2_FLAG_COMPRESSION
;
832 tencr
= tflags
& ID3v2_FLAG_ENCRYPTION
;
834 /* skip encrypted tags and, if no zlib, compressed tags */
835 if (tencr
|| (!CONFIG_ZLIB
&& tcomp
)) {
842 type
= "encrypted and compressed";
844 av_log(s
, AV_LOG_WARNING
, "Skipping %s ID3v2 frame %s.\n", type
, tag
);
846 /* check for text tag or supported special meta tag */
847 } else if (tag
[0] == 'T' ||
849 (extra_func
= get_extra_meta_func(tag
, isv34
)))) {
852 if (unsync
|| tunsync
|| tcomp
) {
853 av_fast_malloc(&buffer
, &buffer_size
, tlen
);
855 av_log(s
, AV_LOG_ERROR
, "Failed to alloc %d bytes\n", tlen
);
859 if (unsync
|| tunsync
) {
860 int64_t end
= avio_tell(pb
) + tlen
;
864 while (avio_tell(pb
) < end
&& b
- buffer
< tlen
&& !pb
->eof_reached
) {
866 if (*(b
- 1) == 0xff && avio_tell(pb
) < end
- 1 &&
869 uint8_t val
= avio_r8(pb
);
870 *b
++ = val
? val
: avio_r8(pb
);
873 ffio_init_context(&pb_local
, buffer
, b
- buffer
, 0, NULL
, NULL
, NULL
,
876 pbx
= &pb_local
; // read from sync buffer
883 av_log(s
, AV_LOG_DEBUG
, "Compresssed frame %s tlen=%d dlen=%ld\n", tag
, tlen
, dlen
);
885 av_fast_malloc(&uncompressed_buffer
, &uncompressed_buffer_size
, dlen
);
886 if (!uncompressed_buffer
) {
887 av_log(s
, AV_LOG_ERROR
, "Failed to alloc %ld bytes\n", dlen
);
891 if (!(unsync
|| tunsync
)) {
892 err
= avio_read(pb
, buffer
, tlen
);
894 av_log(s
, AV_LOG_ERROR
, "Failed to read compressed tag\n");
900 err
= uncompress(uncompressed_buffer
, &dlen
, buffer
, tlen
);
902 av_log(s
, AV_LOG_ERROR
, "Failed to uncompress tag: %d\n", err
);
905 ffio_init_context(&pb_local
, uncompressed_buffer
, dlen
, 0, NULL
, NULL
, NULL
, NULL
);
907 pbx
= &pb_local
; // read from sync buffer
912 read_ttag(s
, pbx
, tlen
, metadata
, tag
);
914 /* parse special meta tag */
915 extra_func
->read(s
, pbx
, tlen
, tag
, extra_meta
, isv34
);
916 } else if (!tag
[0]) {
918 av_log(s
, AV_LOG_WARNING
, "invalid frame id, assuming padding\n");
922 /* Skip to end of tag */
924 avio_seek(pb
, next
, SEEK_SET
);
927 /* Footer preset, always 10 bytes, skip over it */
928 if (version
== 4 && flags
& 0x10)
933 av_log(s
, AV_LOG_INFO
, "ID3v2.%d tag skipped, cannot handle %s\n",
935 avio_seek(pb
, end
, SEEK_SET
);
937 av_free(uncompressed_buffer
);
941 static void id3v2_read_internal(AVIOContext
*pb
, AVDictionary
**metadata
,
942 AVFormatContext
*s
, const char *magic
,
943 ID3v2ExtraMeta
**extra_meta
, int64_t max_search_size
)
946 uint8_t buf
[ID3v2_HEADER_SIZE
];
950 if (max_search_size
&& max_search_size
< ID3v2_HEADER_SIZE
)
953 start
= avio_tell(pb
);
955 /* save the current offset in case there's nothing to read/skip */
957 if (max_search_size
&& off
- start
>= max_search_size
- ID3v2_HEADER_SIZE
) {
958 avio_seek(pb
, off
, SEEK_SET
);
962 ret
= avio_read(pb
, buf
, ID3v2_HEADER_SIZE
);
963 if (ret
!= ID3v2_HEADER_SIZE
) {
964 avio_seek(pb
, off
, SEEK_SET
);
967 found_header
= ff_id3v2_match(buf
, magic
);
969 /* parse ID3v2 header */
970 len
= ((buf
[6] & 0x7f) << 21) |
971 ((buf
[7] & 0x7f) << 14) |
972 ((buf
[8] & 0x7f) << 7) |
974 id3v2_parse(pb
, metadata
, s
, len
, buf
[3], buf
[5], extra_meta
);
976 avio_seek(pb
, off
, SEEK_SET
);
978 } while (found_header
);
979 ff_metadata_conv(metadata
, NULL
, ff_id3v2_34_metadata_conv
);
980 ff_metadata_conv(metadata
, NULL
, id3v2_2_metadata_conv
);
981 ff_metadata_conv(metadata
, NULL
, ff_id3v2_4_metadata_conv
);
982 merge_date(metadata
);
985 void ff_id3v2_read_dict(AVIOContext
*pb
, AVDictionary
**metadata
,
986 const char *magic
, ID3v2ExtraMeta
**extra_meta
)
988 id3v2_read_internal(pb
, metadata
, NULL
, magic
, extra_meta
, 0);
991 void ff_id3v2_read(AVFormatContext
*s
, const char *magic
,
992 ID3v2ExtraMeta
**extra_meta
, unsigned int max_search_size
)
994 id3v2_read_internal(s
->pb
, &s
->metadata
, s
, magic
, extra_meta
, max_search_size
);
997 void ff_id3v2_free_extra_meta(ID3v2ExtraMeta
**extra_meta
)
999 ID3v2ExtraMeta
*current
= *extra_meta
, *next
;
1000 const ID3v2EMFunc
*extra_func
;
1003 if ((extra_func
= get_extra_meta_func(current
->tag
, 1)))
1004 extra_func
->free(current
->data
);
1005 next
= current
->next
;
1013 int ff_id3v2_parse_apic(AVFormatContext
*s
, ID3v2ExtraMeta
**extra_meta
)
1015 ID3v2ExtraMeta
*cur
;
1017 for (cur
= *extra_meta
; cur
; cur
= cur
->next
) {
1018 ID3v2ExtraMetaAPIC
*apic
;
1021 if (strcmp(cur
->tag
, "APIC"))
1025 if (!(st
= avformat_new_stream(s
, NULL
)))
1026 return AVERROR(ENOMEM
);
1028 st
->disposition
|= AV_DISPOSITION_ATTACHED_PIC
;
1029 st
->codec
->codec_type
= AVMEDIA_TYPE_VIDEO
;
1030 st
->codec
->codec_id
= apic
->id
;
1031 av_dict_set(&st
->metadata
, "title", apic
->description
, 0);
1032 av_dict_set(&st
->metadata
, "comment", apic
->type
, 0);
1034 av_init_packet(&st
->attached_pic
);
1035 st
->attached_pic
.buf
= apic
->buf
;
1036 st
->attached_pic
.data
= apic
->buf
->data
;
1037 st
->attached_pic
.size
= apic
->buf
->size
- FF_INPUT_BUFFER_PADDING_SIZE
;
1038 st
->attached_pic
.stream_index
= st
->index
;
1039 st
->attached_pic
.flags
|= AV_PKT_FLAG_KEY
;