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 1.2 2005/02/02 14:46:02 tjdwave Exp $ $Name: Dirac_0_5_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 PicArray& 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( const CodeBlock& code_block , 
00073                                 const int block_idx , 
00074                                 const int xratio , 
00075                                 const int yratio );
00076 
00078         void NonIntegralErrorCalc( const CodeBlock& code_block , 
00079                                    const int block_idx , 
00080                                    const int xratio , 
00081                                    const int yratio );
00082 
00084         void LagrangianCalc(const CodeBlock& code_block , 
00085                             const int block_idx );
00086 
00088         void SelectBestQuant();
00089 
00091         void SelectBestQuant( const int block_idx );
00092 
00094         ValueType BlockAbsMax( const CodeBlock& code_block );
00095 
00096     private:
00098         int m_bottom_idx;
00100         int m_top_idx;
00102         int m_index_step;
00103 
00105         int m_min_idx;
00106 
00108         const PicArray& m_pic_data;
00109 
00111         const float m_lambda;
00112 
00114         float m_entropy_correctionfactor;
00115 
00117         TwoDArray<int> m_count0;
00119         OneDArray<int> m_count1;
00121         TwoDArray<int> m_countPOS;
00123         TwoDArray<int> m_countNEG;    
00125         TwoDArray<double> m_error_total;
00127         TwoDArray<CostType> m_costs;
00128 
00129     };
00130 
00131 } // namespace dirac
00132 
00133 
00134 
00135 #endif

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