3 * Copyright (c) 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #ifndef AVFORMAT_ID3V2_H
23 #define AVFORMAT_ID3V2_H
30 #define ID3v2_HEADER_SIZE 10
33 * Default magic bytes for ID3v2 header: "ID3"
35 #define ID3v2_DEFAULT_MAGIC "ID3"
37 #define ID3v2_FLAG_DATALEN 0x0001
38 #define ID3v2_FLAG_UNSYNCH 0x0002
39 #define ID3v2_FLAG_ENCRYPTION 0x0004
40 #define ID3v2_FLAG_COMPRESSION 0x0008
42 #define ID3v2_PRIV_METADATA_PREFIX "id3v2_priv."
45 ID3v2_ENCODING_ISO8859 = 0,
46 ID3v2_ENCODING_UTF16BOM = 1,
47 ID3v2_ENCODING_UTF16BE = 2,
48 ID3v2_ENCODING_UTF8 = 3,
51 typedef struct ID3v2EncContext {
52 int version; ///< ID3v2 minor version, either 3 or 4
53 int64_t size_pos; ///< offset of the tag total size
54 int len; ///< size of the tag written so far
57 typedef struct ID3v2ExtraMetaGEOB {
65 typedef struct ID3v2ExtraMetaAPIC {
72 typedef struct ID3v2ExtraMetaPRIV {
78 typedef struct ID3v2ExtraMetaCHAP {
84 typedef struct ID3v2ExtraMeta {
86 struct ID3v2ExtraMeta *next;
88 ID3v2ExtraMetaAPIC apic;
89 ID3v2ExtraMetaCHAP chap;
90 ID3v2ExtraMetaGEOB geob;
91 ID3v2ExtraMetaPRIV priv;
96 * Detect ID3v2 Header.
97 * @param buf must be ID3v2_HEADER_SIZE byte long
98 * @param magic magic bytes to identify the header.
99 * If in doubt, use ID3v2_DEFAULT_MAGIC.
101 int ff_id3v2_match(const uint8_t *buf, const char *magic);
104 * Get the length of an ID3v2 tag.
105 * @param buf must be ID3v2_HEADER_SIZE bytes long and point to the start of an
106 * already detected ID3v2 tag
108 int ff_id3v2_tag_len(const uint8_t *buf);
111 * Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
113 * @param metadata Parsed metadata is stored here
114 * @param[out] extra_meta If not NULL, extra metadata is parsed into a list of
115 * ID3v2ExtraMeta structs and *extra_meta points to the head of the list
117 void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta);
120 * Read an ID3v2 tag, including supported extra metadata.
122 * Data is read from and stored to AVFormatContext.
124 * @param[out] extra_meta If not NULL, extra metadata is parsed into a list of
125 * ID3v2ExtraMeta structs and *extra_meta points to the head of the list
126 * @param[opt] max_search_search restrict ID3 magic number search (bytes from start)
128 void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta,
129 unsigned int max_search_size);
132 * Initialize an ID3v2 tag.
134 void ff_id3v2_start(ID3v2EncContext *id3, AVIOContext *pb, int id3v2_version,
138 * Convert and write all global metadata from s into an ID3v2 tag.
140 int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3);
143 * Write an attached picture from pkt into an ID3v2 tag.
145 int ff_id3v2_write_apic(AVFormatContext *s, ID3v2EncContext *id3, AVPacket *pkt);
148 * Finalize an opened ID3v2 tag.
150 void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb, int padding_bytes);
153 * Write an ID3v2 tag containing all global metadata from s.
154 * @param id3v2_version Subversion of ID3v2; supported values are 3 and 4
155 * @param magic magic bytes to identify the header
156 * If in doubt, use ID3v2_DEFAULT_MAGIC.
158 int ff_id3v2_write_simple(struct AVFormatContext *s, int id3v2_version, const char *magic);
161 * Free memory allocated parsing special (non-text) metadata.
162 * @param extra_meta Pointer to a pointer to the head of a ID3v2ExtraMeta list, *extra_meta is set to NULL.
164 void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta);
167 * Create a stream for each APIC (attached picture) extracted from the
170 int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta);
173 * Create chapters for all CHAP tags found in the ID3v2 header.
175 int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta);
178 * Parse PRIV tags into a dictionary. The PRIV owner is the metadata key. The
179 * PRIV data is the value, with non-printable characters escaped.
181 int ff_id3v2_parse_priv_dict(AVDictionary **d, ID3v2ExtraMeta *extra_meta);
184 * Add metadata for all PRIV tags in the ID3v2 header. The PRIV owner is the
185 * metadata key. The PRIV data is the value, with non-printable characters
188 int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta);
190 extern const AVMetadataConv ff_id3v2_34_metadata_conv[];
191 extern const AVMetadataConv ff_id3v2_4_metadata_conv[];
194 * A list of text information frames allowed in both ID3 v2.3 and v2.4
195 * http://www.id3.org/id3v2.4.0-frames
196 * http://www.id3.org/id3v2.4.0-changes
198 extern const char ff_id3v2_tags[][4];
201 * ID3v2.4-only text information frames.
203 extern const char ff_id3v2_4_tags[][4];
206 * ID3v2.3-only text information frames.
208 extern const char ff_id3v2_3_tags[][4];
210 extern const CodecMime ff_id3v2_mime_tags[];
212 extern const char * const ff_id3v2_picture_types[21];
214 #endif /* AVFORMAT_ID3V2_H */