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;