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/*********************************************************************
*
* Copyright (C) 1998, 1999, Espen Skoglund
* Department of Computer Science, University of Tromsų
*
* Filename: id3_header.h
* Description: Definitions for various ID3 headers.
* Author: Espen Skoglund <espensk@stud.cs.uit.no>
* Created at: Thu Nov 5 15:55:10 1998
*
* $Id$
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
********************************************************************/
#ifndef ID3_HEADER_H
#define ID3_HEADER_H
#ifndef __GNUC__
#define __attribute__(A)
#endif
/*
* Layout for the ID3 tag header.
*/
typedef struct id3_taghdr_t id3_taghdr_t;
struct id3_taghdr_t {
guint8 th_version;
guint8 th_revision;
guint8 th_flags;
guint32 th_size;
} __attribute__ ((packed));
#define ID3_THFLAG_USYNC 0x80000000
#define ID3_THFLAG_EXT 0x40000000
#define ID3_THFLAG_EXP 0x20000000
#define ID3_SET_SIZE28(size) \
( ((size << 3) & 0x7f000000) | \
((size << 2) & 0x007f0000) | \
((size << 1) & 0x00007f00) | \
((size ) & 0x0000007f) )
#define ID3_GET_SIZE28(size) \
( ((size & 0x7f000000) >> 3) | \
((size & 0x007f0000) >> 2) | \
((size & 0x00007f00) >> 1) | \
((size & 0x0000007f) ) )
/*
* Layout for the extended header.
*/
typedef struct id3_exthdr_t id3_exthdr_t;
struct id3_exthdr_t {
guint32 eh_size;
guint16 eh_flags;
guint32 eh_padsize;
} __attribute__ ((packed));
#define ID3_EHFLAG_CRC 0x80000000
/*
* Layout for the frame header.
*/
typedef struct id3_framehdr_t id3_framehdr_t;
struct id3_framehdr_t {
guint32 fh_id;
guint32 fh_size;
guint16 fh_flags;
} __attribute__ ((packed));
#define ID3_FHFLAG_TAGALT 0x8000
#define ID3_FHFLAG_FILEALT 0x4000
#define ID3_FHFLAG_RO 0x2000
#define ID3_FHFLAG_COMPRESS 0x0080
#define ID3_FHFLAG_ENCRYPT 0x0040
#define ID3_FHFLAG_GROUP 0x0020
typedef enum {
ID3_UNI_LATIN = 0x007f,
ID3_UNI_LATIN_1 = 0x00ff,
ID3_UNI_SUPPORTED = 0x00ff,
ID3_UNI_UNSUPPORTED = 0xffff,
} id3_unicode_blocks;
#ifdef DEBUG_ID3
#define id3_error(id3, error) \
(void) ( id3->id3_error_msg = error, \
printf( "Error %s, line %d: %s\n", __FILE__, __LINE__, error ) )
#else
#define id3_error(id3, error) \
(void) ( id3->id3_error_msg = error )
#endif
#endif /* ID3_HEADER_H */
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