Created by the British Broadcasting Corporation.
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.
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