Dirac - A Video Codec

Created by the British Broadcasting Corporation.


quality_monitor.h

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00001 /* ***** BEGIN LICENSE BLOCK ***** 00002 * 00003 * $Id: quality_monitor.h,v 1.7 2004/09/21 10:14:47 asuraparaju Exp $ $Name: Dirac_0_4_3 $ 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 #ifndef _QUALITY_MONITOR_H_ 00039 #define _QUALITY_MONITOR_H_ 00040 00041 #include <libdirac_common/common.h> 00042 #include <libdirac_common/frame.h> 00043 #include <libdirac_common/wavelet_utils.h> 00044 00046 class QualityMonitor 00047 { 00048 public: 00049 00051 /* 00052 Constructor sets up initial Lagrangian values. 00053 */ 00054 QualityMonitor(EncoderParams& ep, 00055 const SeqParams& sparams ); 00056 00058 // // 00059 // Assumes default copy constructor, assignment = // 00060 // and destructor // 00062 00064 00070 bool UpdateModel(const Frame& ld_frame, const Frame& orig_frame ,const int count); 00071 00073 void ResetAll(); 00074 00075 private: 00076 //functions 00077 00079 void CalcNewLambdas(const FrameSort fsort, const double slope, const double offset); 00080 00082 double QualityVal(const PicArray& coded_data, const PicArray& orig_data , double cpd ); 00083 00084 //member variables// 00086 00088 EncoderParams& m_encparams; 00089 00091 const ChromaFormat m_cformat; 00092 00094 const int m_true_xl; 00095 00097 const int m_true_yl; 00098 00099 // target quality values for each frame type 00100 OneDArray<double> m_target_quality; 00101 00102 // weighted PSNR values for last of each frame type 00103 OneDArray<double> m_last_quality; 00104 00105 /* Default Model parameters for quality wrt to log10(lambda) 00106 Model is : 00107 quality = offset + slope * log10( lambda ) 00108 for each lambda parameter type. 00109 Default parameters will be used if it's not possible to measure them, and updated 00110 using measured data 00111 */ 00112 OneDArray<double> m_slope; 00113 OneDArray<double> m_offset; 00114 00116 OneDArray<double> m_last_lambda; 00117 00119 double m_L1_me_lambda, m_L2_me_lambda; 00120 00122 double m_me_ratio; 00123 00124 }; 00125 00126 #endif

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