# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

# downconvert.h

Go to the documentation of this file.

    00001 /* ***** BEGIN LICENSE BLOCK *****
    00002 *
    00003 * $Id: downconvert.h,v 1.10 2004/11/29 12:55:06 asuraparaju Exp $ $Name: Dirac_0_6_0 $
    00004 *
    00005 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
    00006 *
    00007 * The contents of this file are subject to the Mozilla Public License
    00008 * Version 1.1 (the "License"); you may not use this file except in compliance
    00009 * with the License. You may obtain a copy of the License at
    00010 * http://www.mozilla.org/MPL/
    00011 *
    00012 * Software distributed under the License is distributed on an "AS IS" basis,
    00013 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
    00014 * the specific language governing rights and limitations under the License.
    00015 *
    00016 * The Original Code is BBC Research and Development code.
    00017 *
    00018 * The Initial Developer of the Original Code is the British Broadcasting
    00019 * Corporation.
    00020 * Portions created by the Initial Developer are Copyright (C) 2004.
    00021 * All Rights Reserved.
    00022 *
    00023 * Contributor(s): Richard Felton (Original Author),
    00024 *                 Thomas Davies
    00025 *
    00026 * Alternatively, the contents of this file may be used under the terms of
    00027 * the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser
    00028 * Public License Version 2.1 (the "LGPL"), in which case the provisions of
    00029 * the GPL or the LGPL are applicable instead of those above. If you wish to
    00030 * allow use of your version of this file only under the terms of the either
    00031 * the GPL or LGPL and not to allow others to use your version of this file
    00032 * under the MPL, indicate your decision by deleting the provisions above
    00033 * and replace them with the notice and other provisions required by the GPL
    00034 * or LGPL. If you do not delete the provisions above, a recipient may use
    00035 * your version of this file under the terms of any one of the MPL, the GPL
    00036 * or the LGPL.
    00037 * ***** END LICENSE BLOCK ***** */
    00038
    00039 #ifndef _DOWNCONVERT_H_
    00040 #define _DOWNCONVERT_H_
    00041
    00042 #include <libdirac_common/common.h>
    00043 namespace dirac
    00044 {
    00045
    00047
    00053     class DownConverter{
    00054
    00055     public:
    00056
    00058         DownConverter();
    00060         ~DownConverter(){};
    00061
    00063
    00068         void DoDownConvert(const PicArray& old_data, PicArray& new_data);
    00069
    00070     private:
    00071         //Copy constructor
    00072         DownConverter(const DownConverter& cpy);//private, body-less: class should not be copied
    00073         //Assignment=
    00074         DownConverter& operator=(const DownConverter& rhs);//private, body-less: class should not be assigned
    00075
    00076         //Applies the filter to a single column
    00077         void RowLoop(const int colpos , const PicArray& old_data , PicArray& new_data );
    00078
    00079         ValueType* m_row_buffer;
    00080
    00081         //Define filter parameters
    00082         static const int Stage_I_Size = 6;
    00083         static const int StageI_I = 86;
    00084         static const int StageI_II = 46;
    00085         static const int StageI_III = 4;
    00086         static const int StageI_IV = -8;
    00087         static const int StageI_V = -4;
    00088         static const int StageI_VI = 4;
    00089         static const int StageI_Shift = 8;
    00090     };
    00091
    00092 } // namespace dirac
    00093
    00094 #endif

© 2004 British Broadcasting Corporation. Dirac code licensed under the Mozilla Public License (MPL) Version 1.1.
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