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/*
* Copyright (C) 2004-2012 Geometer Plus <contact@geometerplus.com>
*
* 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.
*/
#ifndef __HUFFMANDECODER_H__
#define __HUFFMANDECODER_H__
#include <vector>
#include "BitStream.h"
class HuffmanDecoder {
public:
HuffmanDecoder();
bool buildTable();
void reset();
unsigned int getSymbol(BitStream &stream) const;
private:
unsigned char myMaxBitsNumber;
std::vector<unsigned short> mySymbols;
std::vector<unsigned char> CodeLengths;
HuffmanDecoder(const HuffmanDecoder&);
const HuffmanDecoder &operator = (const HuffmanDecoder&);
friend class LZXDecompressor;
};
inline unsigned int HuffmanDecoder::getSymbol(BitStream &stream) const {
unsigned int symbol = mySymbols[stream.peek(myMaxBitsNumber)];
stream.remove(CodeLengths[symbol]);
return symbol;
}
#endif /* __HUFFMANDECODER_H__ */
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