mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 00:32:31 +00:00
124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
/*
|
|
* ID3v2 header parser
|
|
* Copyright (c) 2003 Fabrice Bellard
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVFORMAT_ID3V2_H
|
|
#define AVFORMAT_ID3V2_H
|
|
|
|
#include <stdint.h>
|
|
#include "avformat.h"
|
|
#include "metadata.h"
|
|
|
|
#define ID3v2_HEADER_SIZE 10
|
|
|
|
/**
|
|
* Default magic bytes for ID3v2 header: "ID3"
|
|
*/
|
|
#define ID3v2_DEFAULT_MAGIC "ID3"
|
|
|
|
#define ID3v2_FLAG_DATALEN 0x0001
|
|
#define ID3v2_FLAG_UNSYNCH 0x0002
|
|
#define ID3v2_FLAG_ENCRYPTION 0x0004
|
|
#define ID3v2_FLAG_COMPRESSION 0x0008
|
|
|
|
enum ID3v2Encoding {
|
|
ID3v2_ENCODING_ISO8859 = 0,
|
|
ID3v2_ENCODING_UTF16BOM = 1,
|
|
ID3v2_ENCODING_UTF16BE = 2,
|
|
ID3v2_ENCODING_UTF8 = 3,
|
|
};
|
|
|
|
typedef struct ID3v2ExtraMeta {
|
|
const char *tag;
|
|
void *data;
|
|
struct ID3v2ExtraMeta *next;
|
|
} ID3v2ExtraMeta;
|
|
|
|
typedef struct ID3v2ExtraMetaGEOB {
|
|
uint32_t datasize;
|
|
uint8_t *mime_type;
|
|
uint8_t *file_name;
|
|
uint8_t *description;
|
|
uint8_t *data;
|
|
} ID3v2ExtraMetaGEOB;
|
|
|
|
/**
|
|
* Detect ID3v2 Header.
|
|
* @param buf must be ID3v2_HEADER_SIZE byte long
|
|
* @param magic magic bytes to identify the header.
|
|
* If in doubt, use ID3v2_DEFAULT_MAGIC.
|
|
*/
|
|
int ff_id3v2_match(const uint8_t *buf, const char *magic);
|
|
|
|
/**
|
|
* Get the length of an ID3v2 tag.
|
|
* @param buf must be ID3v2_HEADER_SIZE bytes long and point to the start of an
|
|
* already detected ID3v2 tag
|
|
*/
|
|
int ff_id3v2_tag_len(const uint8_t *buf);
|
|
|
|
/**
|
|
* Read an ID3v2 tag (text tags only)
|
|
*/
|
|
void ff_id3v2_read(AVFormatContext *s, const char *magic);
|
|
|
|
/**
|
|
* Read an ID3v2 tag, including supported extra metadata (currently only GEOB)
|
|
* @param extra_meta If not NULL, extra metadata is parsed into a list of
|
|
* ID3v2ExtraMeta structs and *extra_meta points to the head of the list
|
|
*/
|
|
void ff_id3v2_read_all(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta);
|
|
|
|
/**
|
|
* Write an ID3v2 tag.
|
|
* @param id3v2_version Subversion of ID3v2; supported values are 3 and 4
|
|
* @param magic magic bytes to identify the header
|
|
* If in doubt, use ID3v2_DEFAULT_MAGIC.
|
|
*/
|
|
int ff_id3v2_write(struct AVFormatContext *s, int id3v2_version, const char *magic);
|
|
|
|
/**
|
|
* Free memory allocated parsing special (non-text) metadata.
|
|
* @param extra_meta Pointer to a pointer to the head of a ID3v2ExtraMeta list, *extra_meta is set to NULL.
|
|
*/
|
|
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta);
|
|
|
|
extern const AVMetadataConv ff_id3v2_34_metadata_conv[];
|
|
extern const AVMetadataConv ff_id3v2_4_metadata_conv[];
|
|
|
|
/**
|
|
* A list of text information frames allowed in both ID3 v2.3 and v2.4
|
|
* http://www.id3.org/id3v2.4.0-frames
|
|
* http://www.id3.org/id3v2.4.0-changes
|
|
*/
|
|
extern const char ff_id3v2_tags[][4];
|
|
|
|
/**
|
|
* ID3v2.4-only text information frames.
|
|
*/
|
|
extern const char ff_id3v2_4_tags[][4];
|
|
|
|
/**
|
|
* ID3v2.3-only text information frames.
|
|
*/
|
|
extern const char ff_id3v2_3_tags[][4];
|
|
|
|
#endif /* AVFORMAT_ID3V2_H */
|