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 "avio_internal.h"
44 const AVMetadataConv ff_id3v2_34_metadata_conv[] = {
46 { "TCOM", "composer" },
48 { "TCOP", "copyright" },
49 { "TENC", "encoded_by" },
51 { "TLAN", "language" },
53 { "TPE2", "album_artist" },
54 { "TPE3", "performer" },
56 { "TPUB", "publisher" },
58 { "TSSE", "encoder" },
63 const AVMetadataConv ff_id3v2_4_metadata_conv[] = {
64 { "TCMP", "compilation" },
67 { "TDEN", "creation_time" },
68 { "TSOA", "album-sort" },
69 { "TSOP", "artist-sort" },
70 { "TSOT", "title-sort" },
74 static const AVMetadataConv id3v2_2_metadata_conv[] = {
77 { "TCP", "compilation" },
79 { "TEN", "encoded_by" },
81 { "TP2", "album_artist" },
82 { "TP3", "performer" },
87 const char ff_id3v2_tags[][4] = {
88 "TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDLY", "TENC", "TEXT",
89 "TFLT", "TIT1", "TIT2", "TIT3", "TKEY", "TLAN", "TLEN", "TMED",
90 "TOAL", "TOFN", "TOLY", "TOPE", "TOWN", "TPE1", "TPE2", "TPE3",
91 "TPE4", "TPOS", "TPUB", "TRCK", "TRSN", "TRSO", "TSRC", "TSSE",
95 const char ff_id3v2_4_tags[][4] = {
96 "TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
97 "TPRO", "TSOA", "TSOP", "TSOT", "TSST",
101 const char ff_id3v2_3_tags[][4] = {
102 "TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
106 const char * const ff_id3v2_picture_types[21] = {
108 "32x32 pixels 'file icon'",
113 "Media (e.g. label side of CD)",
114 "Lead artist/lead performer/soloist",
119 "Lyricist/text writer",
120 "Recording Location",
122 "During performance",
123 "Movie/video screen capture",
124 "A bright coloured fish",
126 "Band/artist logotype",
127 "Publisher/Studio logotype",
130 const CodecMime ff_id3v2_mime_tags[] = {
131 { "image/gif", AV_CODEC_ID_GIF },
132 { "image/jpeg", AV_CODEC_ID_MJPEG },
133 { "image/jpg", AV_CODEC_ID_MJPEG },
134 { "image/png", AV_CODEC_ID_PNG },
135 { "image/tiff", AV_CODEC_ID_TIFF },
136 { "image/bmp", AV_CODEC_ID_BMP },
137 { "JPG", AV_CODEC_ID_MJPEG }, /* ID3v2.2 */
138 { "PNG", AV_CODEC_ID_PNG }, /* ID3v2.2 */
139 { "", AV_CODEC_ID_NONE },
142 int ff_id3v2_match(const uint8_t *buf, const char *magic)
144 return buf[0] == magic[0] &&
145 buf[1] == magic[1] &&
146 buf[2] == magic[2] &&
149 (buf[6] & 0x80) == 0 &&
150 (buf[7] & 0x80) == 0 &&
151 (buf[8] & 0x80) == 0 &&
152 (buf[9] & 0x80) == 0;
155 int ff_id3v2_tag_len(const uint8_t *buf)
157 int len = ((buf[6] & 0x7f) << 21) +
158 ((buf[7] & 0x7f) << 14) +
159 ((buf[8] & 0x7f) << 7) +
163 len += ID3v2_HEADER_SIZE;
167 static unsigned int get_size(AVIOContext *s, int len)
171 v = (v << 7) + (avio_r8(s) & 0x7F);
175 static unsigned int size_to_syncsafe(unsigned int size)
177 return (((size) & (0x7f << 0)) >> 0) +
178 (((size) & (0x7f << 8)) >> 1) +
179 (((size) & (0x7f << 16)) >> 2) +
180 (((size) & (0x7f << 24)) >> 3);
183 /* No real verification, only check that the tag consists of
184 * a combination of capital alpha-numerical characters */
185 static int is_tag(const char *buf, unsigned int len)
191 if ((buf[len] < 'A' ||
201 * Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error
203 static int check_tag(AVIOContext *s, int offset, unsigned int len)
208 avio_seek(s, offset, SEEK_SET) < 0 ||
209 avio_read(s, tag, len) < (int)len)
211 else if (!AV_RB32(tag) || is_tag(tag, len))
218 * Free GEOB type extra metadata.
220 static void free_geobtag(void *obj)
222 ID3v2ExtraMetaGEOB *geob = obj;
223 av_freep(&geob->mime_type);
224 av_freep(&geob->file_name);
225 av_freep(&geob->description);
226 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'
363 uint8_t *text = NULL;
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] ? "-" : "",
392 av_dict_set(metadata, key, text, 0);
397 av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n");
404 * Parse a comment tag.
406 static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen,
407 AVDictionary **metadata)
409 const char *key = "comment";
411 int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
412 av_unused int language;
417 encoding = avio_r8(pb);
418 language = avio_rl24(pb);
421 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
422 av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
430 key = (const char *) dst;
431 dict_flags |= AV_DICT_DONT_STRDUP_KEY;
434 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
435 av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
436 if (dict_flags & AV_DICT_DONT_STRDUP_KEY)
437 av_freep((void*)&key);
442 av_dict_set(metadata, key, (const char *) dst, dict_flags);
446 * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
448 static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen,
449 const char *tag, ID3v2ExtraMeta **extra_meta,
452 ID3v2ExtraMetaGEOB *geob_data = NULL;
453 ID3v2ExtraMeta *new_extra = NULL;
460 geob_data = av_mallocz(sizeof(ID3v2ExtraMetaGEOB));
462 av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
463 sizeof(ID3v2ExtraMetaGEOB));
467 new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
469 av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
470 sizeof(ID3v2ExtraMeta));
474 /* read encoding type byte */
475 encoding = avio_r8(pb);
478 /* read MIME type (always ISO-8859) */
479 if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type,
485 if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 ||
489 /* read content description */
490 if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 ||
495 /* save encapsulated binary data */
496 geob_data->data = av_malloc(taglen);
497 if (!geob_data->data) {
498 av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
501 if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
502 av_log(s, AV_LOG_WARNING,
503 "Error reading GEOB frame, data truncated.\n");
504 geob_data->datasize = len;
506 geob_data->data = NULL;
507 geob_data->datasize = 0;
510 /* add data to the list */
511 new_extra->tag = "GEOB";
512 new_extra->data = geob_data;
513 new_extra->next = *extra_meta;
514 *extra_meta = new_extra;
519 av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
520 free_geobtag(geob_data);
525 static int is_number(const char *str)
527 while (*str >= '0' && *str <= '9')
532 static AVDictionaryEntry *get_date_tag(AVDictionary *m, const char *tag)
534 AVDictionaryEntry *t;
535 if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
536 strlen(t->value) == 4 && is_number(t->value))
541 static void merge_date(AVDictionary **m)
543 AVDictionaryEntry *t;
544 char date[17] = { 0 }; // YYYY-MM-DD hh:mm
546 if (!(t = get_date_tag(*m, "TYER")) &&
547 !(t = get_date_tag(*m, "TYE")))
549 av_strlcpy(date, t->value, 5);
550 av_dict_set(m, "TYER", NULL, 0);
551 av_dict_set(m, "TYE", NULL, 0);
553 if (!(t = get_date_tag(*m, "TDAT")) &&
554 !(t = get_date_tag(*m, "TDA")))
556 snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
557 av_dict_set(m, "TDAT", NULL, 0);
558 av_dict_set(m, "TDA", NULL, 0);
560 if (!(t = get_date_tag(*m, "TIME")) &&
561 !(t = get_date_tag(*m, "TIM")))
563 snprintf(date + 10, sizeof(date) - 10,
564 " %.2s:%.2s", t->value, t->value + 2);
565 av_dict_set(m, "TIME", NULL, 0);
566 av_dict_set(m, "TIM", NULL, 0);
570 av_dict_set(m, "date", date, 0);
573 static void free_apic(void *obj)
575 ID3v2ExtraMetaAPIC *apic = obj;
576 av_buffer_unref(&apic->buf);
577 av_freep(&apic->description);
581 static void rstrip_spaces(char *buf)
583 size_t len = strlen(buf);
584 while (len > 0 && buf[len - 1] == ' ')
588 static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen,
589 const char *tag, ID3v2ExtraMeta **extra_meta,
594 const CodecMime *mime = ff_id3v2_mime_tags;
595 enum AVCodecID id = AV_CODEC_ID_NONE;
596 ID3v2ExtraMetaAPIC *apic = NULL;
597 ID3v2ExtraMeta *new_extra = NULL;
598 int64_t end = avio_tell(pb) + taglen;
600 if (taglen <= 4 || (!isv34 && taglen <= 6))
603 new_extra = av_mallocz(sizeof(*new_extra));
604 apic = av_mallocz(sizeof(*apic));
605 if (!new_extra || !apic)
613 taglen -= avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
615 avio_read(pb, mimetype, 3);
620 while (mime->id != AV_CODEC_ID_NONE) {
621 if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
627 if (id == AV_CODEC_ID_NONE) {
628 av_log(s, AV_LOG_WARNING,
629 "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
635 pic_type = avio_r8(pb);
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",
642 apic->type = ff_id3v2_picture_types[pic_type];
644 /* description and picture data */
645 if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
646 av_log(s, AV_LOG_ERROR,
647 "Error decoding attached picture description.\n");
651 apic->buf = av_buffer_alloc(taglen + AV_INPUT_BUFFER_PADDING_SIZE);
652 if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen)
654 memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
656 new_extra->tag = "APIC";
657 new_extra->data = apic;
658 new_extra->next = *extra_meta;
659 *extra_meta = new_extra;
661 // The description must be unique, and some ID3v2 tag writers add spaces
662 // to write several APIC entries with the same description.
663 rstrip_spaces(apic->description);
670 av_freep(&new_extra);
671 avio_seek(pb, end, SEEK_SET);
674 static void free_chapter(void *obj)
676 ID3v2ExtraMetaCHAP *chap = obj;
677 av_freep(&chap->element_id);
678 av_dict_free(&chap->meta);
682 static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34)
686 ID3v2ExtraMeta *new_extra = NULL;
687 ID3v2ExtraMetaCHAP *chap = NULL;
689 new_extra = av_mallocz(sizeof(*new_extra));
690 chap = av_mallocz(sizeof(*chap));
692 if (!new_extra || !chap)
695 if (decode_str(s, pb, 0, &chap->element_id, &len) < 0)
701 chap->start = avio_rb32(pb);
702 chap->end = avio_rb32(pb);
707 if (avio_read(pb, tag, 4) < 4)
710 taglen = avio_rb32(pb);
713 if (taglen < 0 || taglen > len)
716 read_ttag(s, pb, taglen, &chap->meta, tag);
718 avio_skip(pb, taglen);
722 ff_metadata_conv(&chap->meta, NULL, ff_id3v2_34_metadata_conv);
723 ff_metadata_conv(&chap->meta, NULL, ff_id3v2_4_metadata_conv);
725 new_extra->tag = "CHAP";
726 new_extra->data = chap;
727 new_extra->next = *extra_meta;
728 *extra_meta = new_extra;
735 av_freep(&new_extra);
738 static void free_priv(void *obj)
740 ID3v2ExtraMetaPRIV *priv = obj;
741 av_freep(&priv->owner);
742 av_freep(&priv->data);
746 static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen,
747 const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
749 ID3v2ExtraMeta *meta;
750 ID3v2ExtraMetaPRIV *priv;
752 meta = av_mallocz(sizeof(*meta));
753 priv = av_mallocz(sizeof(*priv));
758 if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0)
761 priv->data = av_malloc(taglen);
765 priv->datasize = taglen;
767 if (avio_read(pb, priv->data, priv->datasize) != priv->datasize)
772 meta->next = *extra_meta;
783 typedef struct ID3v2EMFunc {
786 void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen,
787 const char *tag, ID3v2ExtraMeta **extra_meta,
789 void (*free)(void *obj);
792 static const ID3v2EMFunc id3v2_extra_meta_funcs[] = {
793 { "GEO", "GEOB", read_geobtag, free_geobtag },
794 { "PIC", "APIC", read_apic, free_apic },
795 { "CHAP","CHAP", read_chapter, free_chapter },
796 { "PRIV","PRIV", read_priv, free_priv },
801 * Get the corresponding ID3v2EMFunc struct for a tag.
802 * @param isv34 Determines if v2.2 or v2.3/4 strings are used
803 * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
805 static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
808 while (id3v2_extra_meta_funcs[i].tag3) {
809 if (tag && !memcmp(tag,
810 (isv34 ? id3v2_extra_meta_funcs[i].tag4 :
811 id3v2_extra_meta_funcs[i].tag3),
813 return &id3v2_extra_meta_funcs[i];
819 static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
820 AVFormatContext *s, int len, uint8_t version,
821 uint8_t flags, ID3v2ExtraMeta **extra_meta)
826 int64_t next, end = avio_tell(pb) + len;
828 const char *reason = NULL;
829 AVIOContext pb_local;
831 unsigned char *buffer = NULL;
833 const ID3v2EMFunc *extra_func = NULL;
834 unsigned char *uncompressed_buffer = NULL;
835 av_unused int uncompressed_buffer_size = 0;
836 const char *comm_frame;
838 av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
843 reason = "compression";
863 unsync = flags & 0x80;
865 if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */
866 int extlen = get_size(pb, 4);
868 /* In v2.4 the length includes the length field we just read. */
872 reason = "invalid extended header length";
875 avio_skip(pb, extlen);
878 reason = "extended header too long.";
883 while (len >= taghdrlen) {
884 unsigned int tflags = 0;
888 unsigned long av_unused dlen;
891 if (avio_read(pb, tag, 4) < 4)
895 tlen = avio_rb32(pb);
897 /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
898 * so check the next tag to see which one to use */
899 tlen = avio_rb32(pb);
902 int64_t cur = avio_tell(pb);
904 if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */))
907 if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1)
908 tlen = size_to_syncsafe(tlen);
909 else if (check_tag(pb, cur + 2 + tlen, 4) != 1)
911 avio_seek(pb, cur, SEEK_SET);
913 tlen = size_to_syncsafe(tlen);
916 tflags = avio_rb16(pb);
917 tunsync = tflags & ID3v2_FLAG_UNSYNCH;
919 if (avio_read(pb, tag, 3) < 3)
922 tlen = avio_rb24(pb);
926 len -= taghdrlen + tlen;
931 next = avio_tell(pb) + tlen;
935 av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n",
940 if (tflags & ID3v2_FLAG_DATALEN) {
943 dlen = avio_rb32(pb);
948 tcomp = tflags & ID3v2_FLAG_COMPRESSION;
949 tencr = tflags & ID3v2_FLAG_ENCRYPTION;
951 /* skip encrypted tags and, if no zlib, compressed tags */
952 if (tencr || (!CONFIG_ZLIB && tcomp)) {
959 type = "encrypted and compressed";
961 av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag);
963 /* check for text tag or supported special meta tag */
964 } else if (tag[0] == 'T' ||
965 !memcmp(tag, "USLT", 4) ||
966 !strcmp(tag, comm_frame) ||
968 (extra_func = get_extra_meta_func(tag, isv34)))) {
971 if (unsync || tunsync || tcomp) {
972 av_fast_malloc(&buffer, &buffer_size, tlen);
974 av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
978 if (unsync || tunsync) {
981 uint8_t *end = t + tlen;
983 if (avio_read(pb, buffer, tlen) != tlen) {
984 av_log(s, AV_LOG_ERROR, "Failed to read tag data\n");
990 if (t != end && t[-1] == 0xff && !t[0])
994 ffio_init_context(&pb_local, buffer, b - buffer, 0, NULL, NULL, NULL,
997 pbx = &pb_local; // read from sync buffer
1004 av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen);
1006 av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen);
1007 if (!uncompressed_buffer) {
1008 av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
1012 if (!(unsync || tunsync)) {
1013 err = avio_read(pb, buffer, tlen);
1015 av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n");
1021 err = uncompress(uncompressed_buffer, &dlen, buffer, tlen);
1023 av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
1026 ffio_init_context(&pb_local, uncompressed_buffer, dlen, 0, NULL, NULL, NULL, NULL);
1028 pbx = &pb_local; // read from sync buffer
1032 /* parse text tag */
1033 read_ttag(s, pbx, tlen, metadata, tag);
1034 else if (!memcmp(tag, "USLT", 4))
1035 read_uslt(s, pbx, tlen, metadata);
1036 else if (!strcmp(tag, comm_frame))
1037 read_comment(s, pbx, tlen, metadata);
1039 /* parse special meta tag */
1040 extra_func->read(s, pbx, tlen, tag, extra_meta, isv34);
1041 } else if (!tag[0]) {
1043 av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n");
1044 avio_skip(pb, tlen);
1047 /* Skip to end of tag */
1049 avio_seek(pb, next, SEEK_SET);
1052 /* Footer preset, always 10 bytes, skip over it */
1053 if (version == 4 && flags & 0x10)
1058 av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n",
1060 avio_seek(pb, end, SEEK_SET);
1062 av_free(uncompressed_buffer);
1066 static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata,
1067 AVFormatContext *s, const char *magic,
1068 ID3v2ExtraMeta **extra_meta, int64_t max_search_size)
1071 uint8_t buf[ID3v2_HEADER_SIZE];
1075 if (max_search_size && max_search_size < ID3v2_HEADER_SIZE)
1078 start = avio_tell(pb);
1080 /* save the current offset in case there's nothing to read/skip */
1081 off = avio_tell(pb);
1082 if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) {
1083 avio_seek(pb, off, SEEK_SET);
1087 ret = ffio_ensure_seekback(pb, ID3v2_HEADER_SIZE);
1089 ret = avio_read(pb, buf, ID3v2_HEADER_SIZE);
1090 if (ret != ID3v2_HEADER_SIZE) {
1091 avio_seek(pb, off, SEEK_SET);
1094 found_header = ff_id3v2_match(buf, magic);
1096 /* parse ID3v2 header */
1097 len = ((buf[6] & 0x7f) << 21) |
1098 ((buf[7] & 0x7f) << 14) |
1099 ((buf[8] & 0x7f) << 7) |
1101 id3v2_parse(pb, metadata, s, len, buf[3], buf[5], extra_meta);
1103 avio_seek(pb, off, SEEK_SET);
1105 } while (found_header);
1106 ff_metadata_conv(metadata, NULL, ff_id3v2_34_metadata_conv);
1107 ff_metadata_conv(metadata, NULL, id3v2_2_metadata_conv);
1108 ff_metadata_conv(metadata, NULL, ff_id3v2_4_metadata_conv);
1109 merge_date(metadata);
1112 void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata,
1113 const char *magic, ID3v2ExtraMeta **extra_meta)
1115 id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0);
1118 void ff_id3v2_read(AVFormatContext *s, const char *magic,
1119 ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
1121 id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size);
1124 void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
1126 ID3v2ExtraMeta *current = *extra_meta, *next;
1127 const ID3v2EMFunc *extra_func;
1130 if ((extra_func = get_extra_meta_func(current->tag, 1)))
1131 extra_func->free(current->data);
1132 next = current->next;
1140 int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
1142 ID3v2ExtraMeta *cur;
1144 for (cur = *extra_meta; cur; cur = cur->next) {
1145 ID3v2ExtraMetaAPIC *apic;
1148 if (strcmp(cur->tag, "APIC"))
1152 if (!(st = avformat_new_stream(s, NULL)))
1153 return AVERROR(ENOMEM);
1155 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
1156 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
1157 st->codecpar->codec_id = apic->id;
1159 if (AV_RB64(apic->buf->data) == 0x89504e470d0a1a0a)
1160 st->codecpar->codec_id = AV_CODEC_ID_PNG;
1162 if (apic->description[0])
1163 av_dict_set(&st->metadata, "title", apic->description, 0);
1165 av_dict_set(&st->metadata, "comment", apic->type, 0);
1167 av_init_packet(&st->attached_pic);
1168 st->attached_pic.buf = apic->buf;
1169 st->attached_pic.data = apic->buf->data;
1170 st->attached_pic.size = apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE;
1171 st->attached_pic.stream_index = st->index;
1172 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
1180 int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
1183 ID3v2ExtraMeta *cur;
1184 AVRational time_base = {1, 1000};
1185 ID3v2ExtraMetaCHAP **chapters = NULL;
1186 int num_chapters = 0;
1189 // since extra_meta is a linked list where elements are prepended,
1190 // we need to reverse the order of chapters
1191 for (cur = *extra_meta; cur; cur = cur->next) {
1192 ID3v2ExtraMetaCHAP *chap;
1194 if (strcmp(cur->tag, "CHAP"))
1198 if ((ret = av_dynarray_add_nofree(&chapters, &num_chapters, chap)) < 0)
1202 for (i = 0; i < (num_chapters / 2); i++) {
1203 ID3v2ExtraMetaCHAP *right;
1206 right_index = (num_chapters - 1) - i;
1207 right = chapters[right_index];
1209 chapters[right_index] = chapters[i];
1210 chapters[i] = right;
1213 for (i = 0; i < num_chapters; i++) {
1214 ID3v2ExtraMetaCHAP *chap;
1218 chapter = avpriv_new_chapter(s, i, time_base, chap->start, chap->end, chap->element_id);
1222 if ((ret = av_dict_copy(&chapter->metadata, chap->meta, 0)) < 0)
1227 av_freep(&chapters);
1231 int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta **extra_meta)
1233 ID3v2ExtraMeta *cur;
1234 int dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL;
1236 for (cur = *extra_meta; cur; cur = cur->next) {
1237 if (!strcmp(cur->tag, "PRIV")) {
1238 ID3v2ExtraMetaPRIV *priv = cur->data;
1240 char *escaped, *key;
1243 if ((key = av_asprintf(ID3v2_PRIV_METADATA_PREFIX "%s", priv->owner)) == NULL) {
1244 return AVERROR(ENOMEM);
1247 av_bprint_init(&bprint, priv->datasize + 1, AV_BPRINT_SIZE_UNLIMITED);
1249 for (i = 0; i < priv->datasize; i++) {
1250 if (priv->data[i] < 32 || priv->data[i] > 126 || priv->data[i] == '\\') {
1251 av_bprintf(&bprint, "\\x%02x", priv->data[i]);
1253 av_bprint_chars(&bprint, priv->data[i], 1);
1257 if ((ret = av_bprint_finalize(&bprint, &escaped)) < 0) {
1262 if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) {
1273 int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
1275 return ff_id3v2_parse_priv_dict(&s->metadata, extra_meta);