RLencoder.h

#pragma once


#include <libutl/Encoder.h>


UTL_NS_BEGIN;



class RLencoder : public Encoder
{
    UTL_CLASS_DECL(RLencoder, Encoder);

public:
    RLencoder(uint_t mode,
              Stream* stream,
              bool owner = true,
              uint_t minRunLength = 3,
              uint_t runLengthBits = 8,
              bool eob = true)
    {
        init();
        start(mode, stream, owner, minRunLength, runLengthBits, eob);
    }

    virtual size_t decode(byte_t* block, size_t num);

    virtual size_t encode(const byte_t* block, size_t num);

    void start(uint_t mode,
               Stream* stream,
               bool owner = true,
               uint_t minRunLength = 3,
               uint_t runLengthBits = 8,
               bool eob = true);

protected:
    virtual void clear();
    virtual void finishEncoding();

private:
    void init();
    void
    deInit()
    {
        close();
    }
    void clearSelf();
    bool
    getEOB() const
    {
        return getFlag(flg_eob);
    }
    void
    setEOB(bool eob)
    {
        setFlag(flg_eob, eob);
    }

private:
    uint_t _minRunLen;
    uint_t _maxRunLen;
    uint_t _runLenBits;
    int _saveC2;
    enum flg_t
    {
        flg_eob = 9
    };
};


UTL_NS_END;