# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

# quant_chooser.h

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    00001 /* ***** BEGIN LICENSE BLOCK *****
    00002 *
    00003 * $Id: quant_chooser.h,v 1.7 2008/05/27 01:29:54 asuraparaju Exp $ $Name: Dirac_1_0_2 $
    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): Thomas Davies (Original Author)
    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
    00039 #ifndef _QUANT_CHOOSER_H_
    00040 #define _QUANT_CHOOSER_H_
    00041
    00042 #include <libdirac_common/arrays.h>
    00043 #include <libdirac_common/wavelet_utils.h>
    00044 #include <libdirac_common/common.h>
    00045
    00046 namespace dirac
    00047 {
    00049
    00052     class QuantChooser
    00053     {
    00054     public:
    00055
    00057         QuantChooser( const CoeffArray& pic_data , const float lambda  );
    00058
    00060         int GetBestQuant( Subband& node );
    00061
    00063         void SetEntropyCorrection( const float ecfac ){ m_entropy_correctionfactor = ecfac; }
    00064     private:
    00066         QuantChooser(const QuantChooser& cpy);
    00067
    00069         QuantChooser& operator=(const QuantChooser& rhs);
    00070
    00072         void IntegralErrorCalc( Subband& node , const int xratio , const int yratio );
    00073
    00075         void NonIntegralErrorCalc( Subband& node, const int xratio, const int yratio );
    00076
    00078         void LagrangianCalc();
    00079
    00081         void SelectBestQuant();
    00082
    00083         CoeffType BlockAbsMax( const Subband& node );
    00084
    00086         void SetSkip( CodeBlock& cblock , const int qidx);
    00087
    00088     private:
    00090         float m_subband_wt;
    00091
    00093         int m_bottom_idx;
    00095         int m_top_idx;
    00097         int m_index_step;
    00098
    00100         int m_min_idx;
    00101
    00103         const CoeffArray& m_coeff_data;
    00104
    00106         const float m_lambda;
    00107
    00109         float m_entropy_correctionfactor;
    00110
    00112         OneDArray<int> m_count0;
    00114         int m_count1;
    00116         OneDArray<int> m_countPOS;
    00118         OneDArray<int> m_countNEG;
    00120         OneDArray<double> m_error_total;
    00122         OneDArray<CostType> m_costs;
    00123
    00124     };
    00125
    00126 } // namespace dirac
    00127
    00128
    00129
    00130 #endif

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