downconvert.h

/* ***** BEGIN LICENSE BLOCK *****
*
* $Id: downconvert.h,v 1.2 2005/01/30 05:11:42 gabest Exp $ $Name:  $
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
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* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* The Original Code is BBC Research and Development code.
*
* The Initial Developer of the Original Code is the British Broadcasting
* Corporation.
* Portions created by the Initial Developer are Copyright (C) 2004.
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* Contributor(s): Richard Felton (Original Author),
*                 Thomas Davies
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#ifndef _DOWNCONVERT_H_
#define _DOWNCONVERT_H_

#include <libdirac_common/common.h>
namespace dirac
{


    class DownConverter{

    public:

        DownConverter();
        ~DownConverter(){};


        void DoDownConvert(const PicArray& old_data, PicArray& new_data);

    private:
        //Copy constructor
        DownConverter(const DownConverter& cpy);//private, body-less: class should not be copied
        //Assignment=
        DownConverter& operator=(const DownConverter& rhs);//private, body-less: class should not be assigned

        //Applies the filter to a single column
        void RowLoop(const int colpos , const PicArray& old_data , PicArray& new_data );

        ValueType* m_row_buffer;

        //Define filter parameters
        static const int Stage_I_Size = 6;
        static const int StageI_I = 86;
        static const int StageI_II = 46;
        static const int StageI_III = 4;
        static const int StageI_IV = -8; 
        static const int StageI_V = -4;
        static const int StageI_VI = 4;
        static const int StageI_Shift = 8;
    };

} // namespace dirac

#endif

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