# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

# upconvert.h

Go to the documentation of this file.

    00001 /* ***** BEGIN LICENSE BLOCK *****
    00002 *
    00003 * $Id: upconvert.h,v 1.10 2007/02/07 12:03:34 davidf_ Exp $ $Name: Dirac_0_7_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), Thomas Davies
    00024 *
    00025 * Alternatively, the contents of this file may be used under the terms of
    00026 * the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser
    00027 * Public License Version 2.1 (the "LGPL"), in which case the provisions of
    00028 * the GPL or the LGPL are applicable instead of those above. If you wish to
    00029 * allow use of your version of this file only under the terms of the either
    00030 * the GPL or LGPL and not to allow others to use your version of this file
    00031 * under the MPL, indicate your decision by deleting the provisions above
    00032 * and replace them with the notice and other provisions required by the GPL
    00033 * or LGPL. If you do not delete the provisions above, a recipient may use
    00034 * your version of this file under the terms of any one of the MPL, the GPL
    00035 * or the LGPL.
    00036 * ***** END LICENSE BLOCK ***** */
    00037
    00038 #ifndef _UPCONVERT_H_
    00039 #define _UPCONVERT_H_
    00040
    00041 #include <libdirac_common/common.h>
    00042
    00043 namespace dirac
    00044 {
    00045     //Optimised upconversion class - no array resizes.
    00046     //Uses integer math - no floats!
    00047     //
    00048
    00050
    00053     class UpConverter
    00054     {
    00055
    00056     public:
    00057
    00059         UpConverter(int min_val, int max_val)
    00060             : m_min_val(min_val), m_max_val(max_val) {};
    00061
    00063         ~UpConverter() {};
    00064
    00066
    00071         void DoUpConverter(const PicArray& pic_data, PicArray& up_data);
    00072
    00073     private:
    00075         UpConverter(const UpConverter& cpy);
    00076
    00078         UpConverter& operator=(const UpConverter& rhs);
    00079
    00081         void RowLoop(PicArray& up_data, const int row_num );
    00082
    00083     private:
    00084         //Variable to keep the loops in check
    00085         int m_width_old, m_height_old;
    00086         int m_width_new, m_height_new;
    00087
    00088         //Define first set of filter parameters
    00089         static const int m_filter_size = 5;
    00090         static const int m_filter_shift = 8;
    00091
    00092         static const int m_tap0 = 167;
    00093         static const int m_tap1 = -56;
    00094         static const int m_tap2 = 25;
    00095         static const int m_tap3 = -11;
    00096         static const int m_tap4 = 3;
    00097
    00098         const int m_min_val;
    00099         const int m_max_val;
    00100     };
    00101
    00102 } // namespace dirac
    00103
    00104 #endif

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