upconvert.h

/* ***** BEGIN LICENSE BLOCK *****
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* $Id: upconvert.h,v 1.2 2005/01/30 05:11:40 gabest Exp $ $Name:  $
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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* The Original Code is BBC Research and Development code.
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* The Initial Developer of the Original Code is the British Broadcasting
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* Contributor(s): Richard Felton (Original Author), Thomas Davies
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#ifndef _UPCONVERT_H_
#define _UPCONVERT_H_

#include <libdirac_common/common.h>

namespace dirac
{
    //Optimised upconversion class - no array resizes.
    //Uses integer math - no floats!
    //


    class UpConverter
    {

    public:

        UpConverter(){}
        ~UpConverter(){};


        void DoUpConverter(const PicArray& pic_data, PicArray& up_data);

    private:
        UpConverter(const UpConverter& cpy);

        UpConverter& operator=(const UpConverter& rhs);

        void RowLoop(PicArray& up_data, const int row_num);

    private:
        //Variable to keep the loops in check
        int xOld, yOld;
        int xNew, yNew;

        //Define first set of filter parameters
        static const int Stage_I_Size = 6;
        static const int StageI_I = 167;
        static const int StageI_II = -56; 
        static const int StageI_III = 25;
        static const int StageI_IV = -11; 
        static const int StageI_V = 4;
        static const int StageI_VI = -1;    
        static const int Stage_I_Shift = 8;
    };

} // namespace dirac

#endif

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