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cebix |
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/* |
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* psid.h - PSID file format definitions |
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* |
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* SIDPlayer (C) Copyright 1996-2000 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#ifndef PSID_H |
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#define PSID_H |
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#include "types.h" |
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// Minimum and maximum header length |
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const int PSID_MIN_HEADER_LENGTH = 118; // Version 1 |
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const int PSID_MAX_HEADER_LENGTH = 124; // Version 2 |
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// Offsets of fields in header (all fields big-endian) |
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enum { |
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PSID_ID = 0, // 'PSID' |
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PSID_VERSION = 4, // 1 or 2 |
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PSID_LENGTH = 6, // Header length |
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PSID_START = 8, // C64 load address |
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PSID_INIT = 10, // C64 init routine address |
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PSID_MAIN = 12, // C64 replay routine address |
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PSID_NUMBER = 14, // Number of subsongs |
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PSID_DEFSONG = 16, // Main subsong number |
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PSID_SPEED = 18, // Speed flags (1 bit/song) |
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PSID_NAME = 22, // Module name (ISO Latin1 character set) |
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PSID_AUTHOR = 54, // Author name (dto.) |
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PSID_COPYRIGHT = 86, // Copyright info (dto.) |
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PSID_FLAGS = 118, // Flags (only in version 2 header) |
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PSID_RESERVED = 120 |
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}; |
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// Read 16-bit quantity from PSID header |
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inline uint16 read_psid_16(const uint8 *p, int offset) |
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{ |
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return (p[offset] << 8) | p[offset + 1]; |
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} |
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// Read 32-bit quantity from PSID header |
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inline uint32 read_psid_32(const uint8 *p, int offset) |
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{ |
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return (p[offset] << 24) | (p[offset + 1] << 16) | (p[offset + 2] << 8) | p[offset + 3]; |
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} |
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#endif |
