scalingattrib.h

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#ifndef scalingattrib_h
#define scalingattrib_h

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        N. Hemstra
 Date:          December 2004
 RCS:           $Id$
________________________________________________________________________

-*/


#include "attributesmod.h"
#include "attribprovider.h"

namespace Attrib
{

mExpClass(Attributes) Scaling: public Provider
{
public:
    static void         initClass();
                        Scaling(Desc&);
    static const char*  attribName()            { return "Scaling"; }
    static const char*  scalingTypeStr()        { return "scalingtype"; }
    static const char*  powervalStr()           { return "powerval"; }
    static const char*  gateStr()               { return "timegate"; }
    static const char*  factorStr()             { return "scalefactor"; }
    static const char*  widthStr()              { return "width"; }
    static const char*  mutefractionStr()       { return "mutefraction"; }
    static const char*  statsTypeStr()          { return "statstype"; }
    static const char*  sqrangeStr()            { return "sqrange"; }
    static const char*  squntouchedStr()        { return "squntouched"; }
    static const char*  statsTypeNamesStr(int type);
    static const char*  scalingTypeNamesStr(int type);

protected:
                        ~Scaling() {}
    static Provider*    createInstance(Desc&);
    static void         updateDesc(Desc&);

    bool                allowParallelComputation() const;

    bool                getInputOutput(int input,TypeSet<int>& res) const;
    bool                getInputData(const BinID&,int zintv);
    bool                computeData(const DataHolder&,const BinID& relpos,
                                    int z0,int nrsamples,int threadid) const;

    void                getSampleGates(const TypeSet<Interval<float> >& oldtgs,
                                       TypeSet< Interval<int> >& newsampgates,
                                       int z0,int nrsamples) const;
    void                scaleSqueeze(const DataHolder&, int, int) const;
    void                scaleZN(const DataHolder&, int, int) const;
    void                scaleAGC(const DataHolder&,int z0,int nrsamples) const;
    void                scaleGain(const DataHolder&,int z0,int nrsamples) const;
    void                getScaleFactorsFromStats(
                                const TypeSet<Interval<int> >& gates,
                                TypeSet<float>& factors,int) const;
    void                getTrendsFromStats(
                                const TypeSet<Interval<int> >& gates,int);
    const Interval<int>* desZSampMargin( int inp, int ) const;

    int                 scalingtype_;
    int                 statstype_;
    float               powerval_;
    TypeSet< Interval<float> >  gates_;
    TypeSet<float>      factors_;
    const DataHolder*   inputdata_;
    int                 dataidx_;
    Interval<int>       desgate_;

    // for Squeeze
    Interval<float>     sqrg_;
    Interval<float>     squrg_;

    // for AGC
    float               width_;
    Interval<float>     window_;
    float               mutefraction_;

    //for trend removal ( trend of aX+b type )
    struct Trend
    {
                        Trend( float a, float b )
                            : a_( a )
                            , b_( b )                   {};

        float           valueAtX( float x ) const       { return a_ * x + b_; }
        bool            operator==( Trend t ) const
                                                        { return t.a_==a_
                                                              && t.b_==b_; }

        float           a_;
        float           b_;
    };

    TypeSet<Trend>      trends_;
};

}; // namespace Attrib

#endif