quality_monitor.h

/* ***** BEGIN LICENSE BLOCK *****
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* $Id: quality_monitor.h,v 1.3 2005/01/30 05:11:41 gabest Exp $ $Name:  $
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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* The Original Code is BBC Research and Development code.
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* Contributor(s): Thomas Davies (Original Author)
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#ifndef _QUALITY_MONITOR_H_
#define _QUALITY_MONITOR_H_

#include <libdirac_common/common.h>
#include <libdirac_common/frame.h>
#include <libdirac_common/wavelet_utils.h>
namespace dirac
{

    class QualityMonitor
    {
    public:

        /*
           Constructor sets up initial Lagrangian values.
        */
        QualityMonitor(EncoderParams& ep,
                       const SeqParams& sparams );

        //                                                        //
        //    Assumes default copy constructor,  assignment =     //
        //                 and destructor                         //


        bool UpdateModel(const Frame& ld_frame, const Frame& orig_frame ,const int count);

        void ResetAll();

    private:
        //functions

        void CalcNewLambdas(const FrameSort fsort, const double slope, const double offset);

        double QualityVal( const PicArray& coded_data , 
                                           const PicArray& orig_data ,
                                           double cpd , 
                                           const FrameSort fsort );

        //member variables//

        EncoderParams& m_encparams;

        const ChromaFormat m_cformat;

        const int m_true_xl;

        const int m_true_yl;

        // target quality values for each frame type
        OneDArray<double> m_target_quality;

        // weighted PSNR values for last of each frame type
        OneDArray<double> m_last_quality;

        /* Default Model parameters for quality wrt to log10(lambda)
           Model is : 
                quality = offset + slope * log10( lambda )
            for each lambda parameter type.
            Default parameters will be used if it's not possible to measure
            them, and updated using measured data
        */
        OneDArray<double> m_slope;
        OneDArray<double> m_offset;

        OneDArray<double> m_last_lambda;

        double m_L1_me_lambda, m_L2_me_lambda;

        double m_me_ratio;

    };

} // namespace dirac

#endif

---