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 1.10 2005/02/02 14:47:18 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
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 namespace dirac
00045 {
00046 
00048     class QualityMonitor
00049     {
00050     public:
00051 
00053         /*
00054            Constructor sets up initial Lagrangian values.
00055         */
00056         QualityMonitor(EncoderParams& ep,
00057                        const SeqParams& sparams );
00058 
00060         //                                                        //
00061         //    Assumes default copy constructor,  assignment =     //
00062         //                 and destructor                         //
00064 
00066 
00072         bool UpdateModel(const Frame& ld_frame, const Frame& orig_frame ,const int count);
00073 
00075         void ResetAll();
00076 
00077     private:
00078         //functions
00079 
00081         void CalcNewLambdas(const FrameSort fsort, const double slope, const double offset);
00082 
00084         double QualityVal( const PicArray& coded_data , 
00085                                            const PicArray& orig_data ,
00086                                            double cpd , 
00087                                            const FrameSort fsort );
00088 
00089         ValueType Filter( const PicArray& data , const int xpos , const int ypos ) const;
00090 
00091         //member variables//
00093 
00095         EncoderParams& m_encparams;
00096 
00098         const ChromaFormat m_cformat;
00099 
00101         const int m_true_xl;
00102 
00104         const int m_true_yl;
00105 
00106         // target quality values for each frame type
00107         OneDArray<double> m_target_quality;
00108 
00109         // weighted PSNR values for last of each frame type
00110         OneDArray<double> m_last_quality;
00111 
00112         /* Default Model parameters for quality wrt to log10(lambda)
00113            Model is : 
00114                 quality = offset + slope * log10( lambda )
00115             for each lambda parameter type.
00116             Default parameters will be used if it's not possible to measure
00117             them, and updated using measured data
00118         */
00119         OneDArray<double> m_slope;
00120         OneDArray<double> m_offset;
00121 
00123         OneDArray<double> m_last_lambda;
00124 
00126         double m_L1_me_lambda, m_L2_me_lambda;
00127 
00129         double m_me_ratio;
00130 
00131     };
00132 
00133 } // namespace dirac
00134 
00135 #endif

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