PeerStreamer

/*

 * 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,

};

/**

 * Detect ID3v2 Header.

 * @param buf   must be ID3v2_HEADER_SIZE byte long

 * @param magic magic bytes to identify the header, machine byte order.

 * 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

 */

void ff_id3v2_read(AVFormatContext *s, const char *magic);

extern const AVMetadataConv ff_id3v2_34_metadata_conv[];

extern const AVMetadataConv ff_id3v2_4_metadata_conv[];

extern const AVMetadataConv ff_id3v2_2_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 */