You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
878 B
42 lines
878 B
13 years ago
|
#ifndef LZWDecode_H
|
||
|
|
#define LZWDecode_H
|
||
|
|
|
||
|
|
#include <string>
|
||
|
|
#include "Decoder.h"
|
||
|
|
#include "FilterPredictor.h"
|
||
|
|
|
||
|
|
namespace merge_lib
|
||
|
|
{
|
||
|
|
// this class provides method for FlateDecode encoding and decoding
|
||
|
|
class LZWDecode : public Decoder
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
LZWDecode();
|
||
|
|
virtual ~LZWDecode();
|
||
|
|
bool encode(std::string & decoded) {return true;};
|
||
|
|
bool decode(std::string & encoded);
|
||
|
|
void initialize(Object * objectWithStram);
|
||
|
|
private:
|
||
|
|
|
||
|
|
FilterPredictor *_predict;
|
||
|
|
|
||
|
|
void clearTable();
|
||
|
|
int getCode();
|
||
|
|
|
||
|
|
std::string &_encoded;
|
||
|
|
std::string _dummy;
|
||
|
|
size_t _curSymbolIndex;
|
||
|
|
|
||
|
|
int _earlyChange; // early parameter
|
||
|
|
int _readBuf;
|
||
|
|
int _readBits;
|
||
|
|
int _nextCode;
|
||
|
|
int _bitsToRead;
|
||
|
|
bool _first;
|
||
|
|
int _curSequenceLength;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // LZW_DECODE_H_INCLUDED
|
||
|
|
|