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
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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

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