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/* ScummVM - Scumm Interpreter
* Copyright (C) 2003-2006 The ScummVM project
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef SKY_RNC_DECO_H
#define SKY_RNC_DECO_H
#include "common/stdafx.h"
#define RNC_SIGNATURE 0x524E4301 // "RNC\001"
namespace Sky {
class RncDecoder {
protected:
uint16 _rawTable[64];
uint16 _posTable[64];
uint16 _lenTable[64];
uint16 _crcTable[256];
uint16 _bitBuffl;
uint16 _bitBuffh;
uint8 _bitCount;
const uint8 *_srcPtr;
uint8 *_dstPtr;
public:
RncDecoder();
~RncDecoder();
int32 unpackM1(const void *input, void *output, uint16 key);
protected:
void initCrc();
uint16 crcBlock(const uint8 *block, uint32 size);
uint16 inputBits(uint8 amount);
void makeHufftable(uint16 *table);
uint16 inputValue(uint16 *table);
};
} // End of namespace Sky
#endif
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