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/bprint.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/intreadwrite.h"
39 #include "libavcodec/png.h"
40 #include "avio_internal.h"
45 const AVMetadataConv ff_id3v2_34_metadata_conv[] = {
47 { "TCOM", "composer" },
49 { "TCOP", "copyright" },
50 { "TENC", "encoded_by" },
52 { "TLAN", "language" },
54 { "TPE2", "album_artist" },
55 { "TPE3", "performer" },
57 { "TPUB", "publisher" },
59 { "TSSE", "encoder" },
64 const AVMetadataConv ff_id3v2_4_metadata_conv[] = {
65 { "TCMP", "compilation" },
68 { "TDEN", "creation_time" },
69 { "TSOA", "album-sort" },
70 { "TSOP", "artist-sort" },
71 { "TSOT", "title-sort" },
75 static const AVMetadataConv id3v2_2_metadata_conv[] = {
78 { "TCP", "compilation" },
80 { "TEN", "encoded_by" },
82 { "TP2", "album_artist" },
83 { "TP3", "performer" },
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",
96 const char ff_id3v2_4_tags[][4] = {
97 "TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
98 "TPRO", "TSOA", "TSOP", "TSOT", "TSST",
102 const char ff_id3v2_3_tags[][4] = {
103 "TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
107 const char * const ff_id3v2_picture_types[21] = {
109 "32x32 pixels 'file icon'",
114 "Media (e.g. label side of CD)",
115 "Lead artist/lead performer/soloist",
120 "Lyricist/text writer",
121 "Recording Location",
123 "During performance",
124 "Movie/video screen capture",
125 "A bright coloured fish",
127 "Band/artist logotype",
128 "Publisher/Studio logotype",
131 const CodecMime ff_id3v2_mime_tags[] = {
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 },
143 int ff_id3v2_match(const uint8_t *buf, const char *magic)
145 return buf[0] == magic[0] &&
146 buf[1] == magic[1] &&
147 buf[2] == magic[2] &&
150 (buf[6] & 0x80) == 0 &&
151 (buf[7] & 0x80) == 0 &&
152 (buf[8] & 0x80) == 0 &&
153 (buf[9] & 0x80) == 0;
156 int ff_id3v2_tag_len(const uint8_t *buf)
158 int len = ((buf[6] & 0x7f) << 21) +
159 ((buf[7] & 0x7f) << 14) +
160 ((buf[8] & 0x7f) << 7) +
164 len += ID3v2_HEADER_SIZE;
168 static unsigned int get_size(AVIOContext *s, int len)
172 v = (v << 7) + (avio_r8(s) & 0x7F);
176 static unsigned int size_to_syncsafe(unsigned int size)
178 return (((size) & (0x7f << 0)) >> 0) +
179 (((size) & (0x7f << 8)) >> 1) +
180 (((size) & (0x7f << 16)) >> 2) +
181 (((size) & (0x7f << 24)) >> 3);
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)
192 if ((buf[len] < 'A' ||
202 * Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error
204 static int check_tag(AVIOContext *s, int offset, unsigned int len)
209 avio_seek(s, offset, SEEK_SET) < 0 ||
210 avio_read(s, tag, len) < (int)len)
212 else if (!AV_RB32(tag) || is_tag(tag, len))
219 * Free GEOB type extra metadata.
221 static void free_geobtag(void *obj)
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);
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.
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
240 * @returns 0 if no error occurred, dst is uninitialized on error
242 static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding,
243 uint8_t **dst, int *maxread)
249 unsigned int (*get)(AVIOContext*) = avio_rb16;
252 if ((ret = avio_open_dyn_buf(&dynbuf)) < 0) {
253 av_log(s, AV_LOG_ERROR, "Error opening memory stream\n");
258 case ID3v2_ENCODING_ISO8859:
261 PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
266 case ID3v2_ENCODING_UTF16BOM:
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);
271 return AVERROR_INVALIDDATA;
273 switch (avio_rb16(pb)) {
279 av_log(s, AV_LOG_ERROR, "Incorrect BOM value\n");
280 ffio_free_dyn_buf(&dynbuf);
283 return AVERROR_INVALIDDATA;
287 case ID3v2_ENCODING_UTF16BE:
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);)
293 left += 2; /* did not read last char from pb */
296 case ID3v2_ENCODING_UTF8:
304 av_log(s, AV_LOG_WARNING, "Unknown encoding\n");
310 avio_close_dyn_buf(dynbuf, dst);
319 static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen,
320 AVDictionary **metadata, const char *key)
323 int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
329 encoding = avio_r8(pb);
330 taglen--; /* account for encoding type byte */
332 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
333 av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
337 if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) &&
338 (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) &&
339 genre <= ID3v1_GENRE_MAX) {
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 */
345 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
346 av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
350 dict_flags |= AV_DICT_DONT_STRDUP_KEY;
355 av_dict_set(metadata, key, dst, dict_flags);
358 static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen,
359 AVDictionary **metadata)
362 uint8_t *descriptor = NULL; // 'Content descriptor'
371 encoding = avio_r8(pb);
374 if (avio_read(pb, lang, 3) < 3)
379 if (decode_str(s, pb, encoding, &descriptor, &taglen) < 0)
382 if (decode_str(s, pb, encoding, &text, &taglen) < 0)
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] ? "-" : "",
394 av_dict_set(metadata, key, text,
395 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
400 av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n");
405 * Parse a comment tag.
407 static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen,
408 AVDictionary **metadata)
410 const char *key = "comment";
412 int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
413 av_unused int language;
418 encoding = avio_r8(pb);
419 language = avio_rl24(pb);
422 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
423 av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
431 key = (const char *) dst;
432 dict_flags |= AV_DICT_DONT_STRDUP_KEY;
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);
443 av_dict_set(metadata, key, (const char *) dst, dict_flags);
446 typedef struct ExtraMetaList {
447 ID3v2ExtraMeta *head, *tail;
450 static void list_append(ID3v2ExtraMeta *new_elem, ExtraMetaList *list)
453 list->tail->next = new_elem;
455 list->head = new_elem;
456 list->tail = new_elem;
460 * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
462 static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen,
463 const char *tag, ExtraMetaList *extra_meta, int isv34)
465 ID3v2ExtraMetaGEOB *geob_data = NULL;
466 ID3v2ExtraMeta *new_extra = NULL;
473 new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
475 av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
476 sizeof(ID3v2ExtraMeta));
480 geob_data = &new_extra->data.geob;
482 /* read encoding type byte */
483 encoding = avio_r8(pb);
486 /* read MIME type (always ISO-8859) */
487 if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type,
493 if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 ||
497 /* read content description */
498 if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 ||
503 /* save encapsulated binary data */
504 geob_data->data = av_malloc(taglen);
505 if (!geob_data->data) {
506 av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
509 if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
510 av_log(s, AV_LOG_WARNING,
511 "Error reading GEOB frame, data truncated.\n");
512 geob_data->datasize = len;
514 geob_data->data = NULL;
515 geob_data->datasize = 0;
518 /* add data to the list */
519 new_extra->tag = "GEOB";
520 list_append(new_extra, extra_meta);
525 av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
526 free_geobtag(geob_data);
531 static int is_number(const char *str)
533 while (*str >= '0' && *str <= '9')
538 static AVDictionaryEntry *get_date_tag(AVDictionary *m, const char *tag)
540 AVDictionaryEntry *t;
541 if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
542 strlen(t->value) == 4 && is_number(t->value))
547 static void merge_date(AVDictionary **m)
549 AVDictionaryEntry *t;
550 char date[17] = { 0 }; // YYYY-MM-DD hh:mm
552 if (!(t = get_date_tag(*m, "TYER")) &&
553 !(t = get_date_tag(*m, "TYE")))
555 av_strlcpy(date, t->value, 5);
556 av_dict_set(m, "TYER", NULL, 0);
557 av_dict_set(m, "TYE", NULL, 0);
559 if (!(t = get_date_tag(*m, "TDAT")) &&
560 !(t = get_date_tag(*m, "TDA")))
562 snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
563 av_dict_set(m, "TDAT", NULL, 0);
564 av_dict_set(m, "TDA", NULL, 0);
566 if (!(t = get_date_tag(*m, "TIME")) &&
567 !(t = get_date_tag(*m, "TIM")))
569 snprintf(date + 10, sizeof(date) - 10,
570 " %.2s:%.2s", t->value, t->value + 2);
571 av_dict_set(m, "TIME", NULL, 0);
572 av_dict_set(m, "TIM", NULL, 0);
576 av_dict_set(m, "date", date, 0);
579 static void free_apic(void *obj)
581 ID3v2ExtraMetaAPIC *apic = obj;
582 av_buffer_unref(&apic->buf);
583 av_freep(&apic->description);
586 static void rstrip_spaces(char *buf)
588 size_t len = strlen(buf);
589 while (len > 0 && buf[len - 1] == ' ')
593 static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen,
594 const char *tag, ExtraMetaList *extra_meta, int isv34)
597 char mimetype[64] = {0};
598 const CodecMime *mime = ff_id3v2_mime_tags;
599 enum AVCodecID id = AV_CODEC_ID_NONE;
600 ID3v2ExtraMetaAPIC *apic = NULL;
601 ID3v2ExtraMeta *new_extra = NULL;
602 int64_t end = avio_tell(pb) + taglen;
604 if (taglen <= 4 || (!isv34 && taglen <= 6))
607 new_extra = av_mallocz(sizeof(*new_extra));
611 apic = &new_extra->data.apic;
618 int ret = avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
619 if (ret < 0 || ret >= taglen)
623 if (avio_read(pb, mimetype, 3) < 0)
630 while (mime->id != AV_CODEC_ID_NONE) {
631 if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
637 if (id == AV_CODEC_ID_NONE) {
638 av_log(s, AV_LOG_WARNING,
639 "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
645 pic_type = avio_r8(pb);
647 if (pic_type < 0 || pic_type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
648 av_log(s, AV_LOG_WARNING, "Unknown attached picture type %d.\n",
652 apic->type = ff_id3v2_picture_types[pic_type];
654 /* description and picture data */
655 if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
656 av_log(s, AV_LOG_ERROR,
657 "Error decoding attached picture description.\n");
661 apic->buf = av_buffer_alloc(taglen + AV_INPUT_BUFFER_PADDING_SIZE);
662 if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen)
664 memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
666 new_extra->tag = "APIC";
668 // The description must be unique, and some ID3v2 tag writers add spaces
669 // to write several APIC entries with the same description.
670 rstrip_spaces(apic->description);
671 list_append(new_extra, extra_meta);
678 av_freep(&new_extra);
679 avio_seek(pb, end, SEEK_SET);
682 static void free_chapter(void *obj)
684 ID3v2ExtraMetaCHAP *chap = obj;
685 av_freep(&chap->element_id);
686 av_dict_free(&chap->meta);
689 static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len,
690 const char *ttag, ExtraMetaList *extra_meta, int isv34)
694 ID3v2ExtraMeta *new_extra = NULL;
695 ID3v2ExtraMetaCHAP *chap = NULL;
697 new_extra = av_mallocz(sizeof(*new_extra));
701 chap = &new_extra->data.chap;
703 if (decode_str(s, pb, 0, &chap->element_id, &len) < 0)
709 chap->start = avio_rb32(pb);
710 chap->end = avio_rb32(pb);
715 if (avio_read(pb, tag, 4) < 4)
718 taglen = avio_rb32(pb);
721 if (taglen < 0 || taglen > len)
724 read_ttag(s, pb, taglen, &chap->meta, tag);
726 avio_skip(pb, taglen);
730 ff_metadata_conv(&chap->meta, NULL, ff_id3v2_34_metadata_conv);
731 ff_metadata_conv(&chap->meta, NULL, ff_id3v2_4_metadata_conv);
733 new_extra->tag = "CHAP";
734 list_append(new_extra, extra_meta);
740 av_freep(&new_extra);
743 static void free_priv(void *obj)
745 ID3v2ExtraMetaPRIV *priv = obj;
746 av_freep(&priv->owner);
747 av_freep(&priv->data);
750 static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen,
751 const char *tag, ExtraMetaList *extra_meta, int isv34)
753 ID3v2ExtraMeta *meta;
754 ID3v2ExtraMetaPRIV *priv;
756 meta = av_mallocz(sizeof(*meta));
760 priv = &meta->data.priv;
762 if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0)
765 priv->data = av_malloc(taglen);
769 priv->datasize = taglen;
771 if (avio_read(pb, priv->data, priv->datasize) != priv->datasize)
775 list_append(meta, extra_meta);
784 typedef struct ID3v2EMFunc {
787 void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen,
788 const char *tag, ExtraMetaList *extra_meta,
790 void (*free)(void *obj);
793 static const ID3v2EMFunc id3v2_extra_meta_funcs[] = {
794 { "GEO", "GEOB", read_geobtag, free_geobtag },
795 { "PIC", "APIC", read_apic, free_apic },
796 { "CHAP","CHAP", read_chapter, free_chapter },
797 { "PRIV","PRIV", read_priv, free_priv },
802 * Get the corresponding ID3v2EMFunc struct for a tag.
803 * @param isv34 Determines if v2.2 or v2.3/4 strings are used
804 * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
806 static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
809 while (id3v2_extra_meta_funcs[i].tag3) {
810 if (tag && !memcmp(tag,
811 (isv34 ? id3v2_extra_meta_funcs[i].tag4 :
812 id3v2_extra_meta_funcs[i].tag3),
814 return &id3v2_extra_meta_funcs[i];
820 static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
821 AVFormatContext *s, int len, uint8_t version,
822 uint8_t flags, ExtraMetaList *extra_meta)
827 int64_t next, end = avio_tell(pb);
829 const char *reason = NULL;
830 AVIOContext pb_local;
832 unsigned char *buffer = NULL;
834 const ID3v2EMFunc *extra_func = NULL;
835 unsigned char *uncompressed_buffer = NULL;
836 av_unused int uncompressed_buffer_size = 0;
837 const char *comm_frame;
839 if (end > INT64_MAX - len - 10)
843 av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
848 reason = "compression";
868 unsync = flags & 0x80;
870 if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */
871 int extlen = get_size(pb, 4);
873 /* In v2.4 the length includes the length field we just read. */
877 reason = "invalid extended header length";
880 avio_skip(pb, extlen);
883 reason = "extended header too long.";
888 while (len >= taghdrlen) {
889 unsigned int tflags = 0;
893 unsigned long av_unused dlen;
896 if (avio_read(pb, tag, 4) < 4)
900 tlen = avio_rb32(pb);
902 /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
903 * so check the next tag to see which one to use */
904 tlen = avio_rb32(pb);
907 int64_t cur = avio_tell(pb);
909 if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */))
912 if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1)
913 tlen = size_to_syncsafe(tlen);
914 else if (check_tag(pb, cur + 2 + tlen, 4) != 1)
916 avio_seek(pb, cur, SEEK_SET);
918 tlen = size_to_syncsafe(tlen);
921 tflags = avio_rb16(pb);
922 tunsync = tflags & ID3v2_FLAG_UNSYNCH;
924 if (avio_read(pb, tag, 3) < 3)
927 tlen = avio_rb24(pb);
931 len -= taghdrlen + tlen;
936 next = avio_tell(pb) + tlen;
940 av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n",
945 if (tflags & ID3v2_FLAG_DATALEN) {
948 dlen = avio_rb32(pb);
953 tcomp = tflags & ID3v2_FLAG_COMPRESSION;
954 tencr = tflags & ID3v2_FLAG_ENCRYPTION;
956 /* skip encrypted tags and, if no zlib, compressed tags */
957 if (tencr || (!CONFIG_ZLIB && tcomp)) {
964 type = "encrypted and compressed";
966 av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag);
968 /* check for text tag or supported special meta tag */
969 } else if (tag[0] == 'T' ||
970 !memcmp(tag, "USLT", 4) ||
971 !strcmp(tag, comm_frame) ||
973 (extra_func = get_extra_meta_func(tag, isv34)))) {
976 if (unsync || tunsync || tcomp) {
977 av_fast_malloc(&buffer, &buffer_size, tlen);
979 av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
983 if (unsync || tunsync) {
986 uint8_t *end = t + tlen;
988 if (avio_read(pb, buffer, tlen) != tlen) {
989 av_log(s, AV_LOG_ERROR, "Failed to read tag data\n");
995 if (t != end && t[-1] == 0xff && !t[0])
999 ffio_init_context(&pb_local, buffer, b - buffer, 0, NULL, NULL, NULL,
1002 pbx = &pb_local; // read from sync buffer
1009 av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen);
1013 if (dlen / 32768 > tlen)
1016 av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen);
1017 if (!uncompressed_buffer) {
1018 av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
1022 if (!(unsync || tunsync)) {
1023 err = avio_read(pb, buffer, tlen);
1025 av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n");
1031 err = uncompress(uncompressed_buffer, &dlen, buffer, tlen);
1033 av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
1036 ffio_init_context(&pb_local, uncompressed_buffer, dlen, 0, NULL, NULL, NULL, NULL);
1038 pbx = &pb_local; // read from sync buffer
1042 /* parse text tag */
1043 read_ttag(s, pbx, tlen, metadata, tag);
1044 else if (!memcmp(tag, "USLT", 4))
1045 read_uslt(s, pbx, tlen, metadata);
1046 else if (!strcmp(tag, comm_frame))
1047 read_comment(s, pbx, tlen, metadata);
1049 /* parse special meta tag */
1050 extra_func->read(s, pbx, tlen, tag, extra_meta, isv34);
1051 } else if (!tag[0]) {
1053 av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n");
1054 avio_skip(pb, tlen);
1057 /* Skip to end of tag */
1059 avio_seek(pb, next, SEEK_SET);
1062 /* Footer preset, always 10 bytes, skip over it */
1063 if (version == 4 && flags & 0x10)
1068 av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n",
1070 avio_seek(pb, end, SEEK_SET);
1072 av_free(uncompressed_buffer);
1076 static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata,
1077 AVFormatContext *s, const char *magic,
1078 ID3v2ExtraMeta **extra_metap, int64_t max_search_size)
1081 uint8_t buf[ID3v2_HEADER_SIZE];
1082 ExtraMetaList extra_meta = { NULL };
1087 *extra_metap = NULL;
1089 if (max_search_size && max_search_size < ID3v2_HEADER_SIZE)
1092 start = avio_tell(pb);
1094 /* save the current offset in case there's nothing to read/skip */
1095 off = avio_tell(pb);
1096 if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) {
1097 avio_seek(pb, off, SEEK_SET);
1101 ret = ffio_ensure_seekback(pb, ID3v2_HEADER_SIZE);
1103 ret = avio_read(pb, buf, ID3v2_HEADER_SIZE);
1104 if (ret != ID3v2_HEADER_SIZE) {
1105 avio_seek(pb, off, SEEK_SET);
1108 found_header = ff_id3v2_match(buf, magic);
1110 /* parse ID3v2 header */
1111 len = ((buf[6] & 0x7f) << 21) |
1112 ((buf[7] & 0x7f) << 14) |
1113 ((buf[8] & 0x7f) << 7) |
1115 id3v2_parse(pb, metadata, s, len, buf[3], buf[5],
1116 extra_metap ? &extra_meta : NULL);
1118 avio_seek(pb, off, SEEK_SET);
1120 } while (found_header);
1121 ff_metadata_conv(metadata, NULL, ff_id3v2_34_metadata_conv);
1122 ff_metadata_conv(metadata, NULL, id3v2_2_metadata_conv);
1123 ff_metadata_conv(metadata, NULL, ff_id3v2_4_metadata_conv);
1124 merge_date(metadata);
1126 *extra_metap = extra_meta.head;
1129 void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata,
1130 const char *magic, ID3v2ExtraMeta **extra_meta)
1132 id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0);
1135 void ff_id3v2_read(AVFormatContext *s, const char *magic,
1136 ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
1138 id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size);
1141 void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
1143 ID3v2ExtraMeta *current = *extra_meta, *next;
1144 const ID3v2EMFunc *extra_func;
1147 if ((extra_func = get_extra_meta_func(current->tag, 1)))
1148 extra_func->free(¤t->data);
1149 next = current->next;
1157 int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
1159 ID3v2ExtraMeta *cur;
1161 for (cur = extra_meta; cur; cur = cur->next) {
1162 ID3v2ExtraMetaAPIC *apic;
1166 if (strcmp(cur->tag, "APIC"))
1168 apic = &cur->data.apic;
1170 ret = ff_add_attached_pic(s, NULL, NULL, &apic->buf, 0);
1173 st = s->streams[s->nb_streams - 1];
1174 st->codecpar->codec_id = apic->id;
1176 if (AV_RB64(st->attached_pic.data) == PNGSIG)
1177 st->codecpar->codec_id = AV_CODEC_ID_PNG;
1179 if (apic->description[0])
1180 av_dict_set(&st->metadata, "title", apic->description, 0);
1182 av_dict_set(&st->metadata, "comment", apic->type, 0);
1188 int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *cur)
1190 AVRational time_base = {1, 1000};
1193 for (unsigned i = 0; cur; cur = cur->next) {
1194 ID3v2ExtraMetaCHAP *chap;
1197 if (strcmp(cur->tag, "CHAP"))
1200 chap = &cur->data.chap;
1201 chapter = avpriv_new_chapter(s, i++, time_base, chap->start,
1202 chap->end, chap->element_id);
1206 if ((ret = av_dict_copy(&chapter->metadata, chap->meta, 0)) < 0)
1213 int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
1215 ID3v2ExtraMeta *cur;
1216 int dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL;
1218 for (cur = extra_meta; cur; cur = cur->next) {
1219 if (!strcmp(cur->tag, "PRIV")) {
1220 ID3v2ExtraMetaPRIV *priv = &cur->data.priv;
1222 char *escaped, *key;
1225 if ((key = av_asprintf(ID3v2_PRIV_METADATA_PREFIX "%s", priv->owner)) == NULL) {
1226 return AVERROR(ENOMEM);
1229 av_bprint_init(&bprint, priv->datasize + 1, AV_BPRINT_SIZE_UNLIMITED);
1231 for (i = 0; i < priv->datasize; i++) {
1232 if (priv->data[i] < 32 || priv->data[i] > 126 || priv->data[i] == '\\') {
1233 av_bprintf(&bprint, "\\x%02x", priv->data[i]);
1235 av_bprint_chars(&bprint, priv->data[i], 1);
1239 if ((ret = av_bprint_finalize(&bprint, &escaped)) < 0) {
1244 if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) {
1253 int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
1255 return ff_id3v2_parse_priv_dict(&s->metadata, extra_meta);