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root/cebix/SIDPlayer/src/psid.h
Revision: 1.4
Committed: 2004-01-12T15:15:49Z (20 years, 1 month ago) by cebix
Content type: text/plain
Branch: MAIN
CVS Tags: HEAD
Changes since 1.3: +1 -1 lines
Log Message:
Happy New Year!

File Contents

# User Rev Content
1 cebix 1.1 /*
2     * psid.h - PSID file format definitions
3     *
4 cebix 1.4 * SIDPlayer (C) Copyright 1996-2004 Christian Bauer
5 cebix 1.1 *
6     * This program is free software; you can redistribute it and/or modify
7     * it under the terms of the GNU General Public License as published by
8     * the Free Software Foundation; either version 2 of the License, or
9     * (at your option) any later version.
10     *
11     * This program 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
14     * GNU General Public License for more details.
15     *
16     * You should have received a copy of the GNU General Public License
17     * along with this program; if not, write to the Free Software
18     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19     */
20    
21     #ifndef PSID_H
22     #define PSID_H
23    
24     #include "types.h"
25    
26    
27     // Minimum and maximum header length
28     const int PSID_MIN_HEADER_LENGTH = 118; // Version 1
29     const int PSID_MAX_HEADER_LENGTH = 124; // Version 2
30    
31     // Offsets of fields in header (all fields big-endian)
32     enum {
33     PSID_ID = 0, // 'PSID'
34     PSID_VERSION = 4, // 1 or 2
35     PSID_LENGTH = 6, // Header length
36     PSID_START = 8, // C64 load address
37     PSID_INIT = 10, // C64 init routine address
38     PSID_MAIN = 12, // C64 replay routine address
39     PSID_NUMBER = 14, // Number of subsongs
40     PSID_DEFSONG = 16, // Main subsong number
41     PSID_SPEED = 18, // Speed flags (1 bit/song)
42     PSID_NAME = 22, // Module name (ISO Latin1 character set)
43     PSID_AUTHOR = 54, // Author name (dto.)
44     PSID_COPYRIGHT = 86, // Copyright info (dto.)
45     PSID_FLAGS = 118, // Flags (only in version 2 header)
46     PSID_RESERVED = 120
47     };
48    
49     // Read 16-bit quantity from PSID header
50     inline uint16 read_psid_16(const uint8 *p, int offset)
51     {
52     return (p[offset] << 8) | p[offset + 1];
53     }
54    
55     // Read 32-bit quantity from PSID header
56     inline uint32 read_psid_32(const uint8 *p, int offset)
57     {
58     return (p[offset] << 24) | (p[offset + 1] << 16) | (p[offset + 2] << 8) | p[offset + 3];
59     }
60    
61     #endif