smoother2d.h

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#ifndef smoother2d_h
#define smoother2d_h

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        K. Tingdahl
 Date:          Feb 2008
 RCS:           $Id$
________________________________________________________________________

-*/

#include "task.h"
#include "convolve2d.h"
#include "arrayndimpl.h"
#include "iopar.h"
#include "coord.h"
#include "windowfunction.h"

template <class T>
mClass(Algo) Smoother2D : public Task
{
public:

                                Smoother2D();
                                ~Smoother2D();

    void                        setInput(const Array2D<T>&,bool hasudf);
    void                        setOutput(Array2D<T>&);
    bool                        setWindow(const char* nm,float param,
                                          int sz0,int sz1);
    int                         getWindowSize(int dim) const;
    const char*                 getWindowName() const;
    float                       getWindowParam() const;

    inline void                 fillPar(IOPar&) const;
    inline bool                 usePar(const IOPar&);

    inline void                 setProgressMeter(ProgressMeter* pm);
    inline bool                 execute();
    inline void                 enableWorkControl(bool);
    inline void                 controlWork(Task::Control);
    inline Task::Control        getState() const;

    static const char*          sKeyWinFunc() { return "Window function"; }
    static const char*          sKeyWinParam() { return "Window parameter"; }
    static const char*          sKeyWinSize() { return "Window size"; }

protected:

    Convolver2D<T>              convolver_;
    bool                        hasudf_;

    Array2DImpl<T>*             window_;
    int                         windowsz0_, windowsz1_;
    BufferString                windowname_;
    float                       windowparam_;
};


template <class T> inline
Smoother2D<T>::Smoother2D()
    : windowparam_( mUdf(float) )
    , window_( 0 )
{
    convolver_.setNormalize( true );
    convolver_.setCorrelate( false );
}


template <class T> inline
Smoother2D<T>::~Smoother2D()
{ delete window_; }


template <class T> inline
int Smoother2D<T>::getWindowSize(int dim) const
{ return window_->info().getSize( dim ); }


template <class T> inline
const char* Smoother2D<T>::getWindowName() const
{ return windowname_.buf(); }


template <class T> inline
float Smoother2D<T>::getWindowParam() const
{ return windowparam_; }


template <class T> inline
void Smoother2D<T>::setInput( const Array2D<T>& ni, bool hasudf )
{
    const Array2D<float>* input = convolver_.getX();

    if ( !input || hasudf_!=hasudf || input->info()!=ni.info() )
    { delete window_; window_ = 0; }

    convolver_.setX( ni, hasudf );
    hasudf_ = hasudf;
}


template <class T> inline
void Smoother2D<T>::setOutput( Array2D<T>& no )
{
    convolver_.setZ( no );
}


template <class T> inline
bool Smoother2D<T>::setWindow( const char* nm, float param,
                               int sz0, int sz1 )
{
    windowname_ = nm;
    windowparam_ = param;
    windowsz0_ = sz0;
    windowsz1_ = sz1;

    delete window_; window_ = 0;

    return true;
}


template <class T> inline
void Smoother2D<T>::fillPar( IOPar& par ) const
{
    par.set( sKeyWinFunc(), windowname_ );
    if ( !mIsUdf(windowparam_) )
        par.set( sKeyWinParam(), windowparam_ );

    par.set(sKeyWinSize(),window_->info().getSize(0),window_->info().getSize(1));
}


template <class T> inline
bool Smoother2D<T>::usePar( const IOPar& par )
{
    int sz0, sz1;
    if ( !par.get(sKeyWinSize(), sz0, sz1 ) )
        return false;

    const char* wn = par.find( sKeyWinFunc() );
    float var = mUdf(float);
    par.get( sKeyWinParam(), var );

    return setWindow( wn, var, sz0, sz1 );
}


#define mImplSetFunc( func, vartype ) \
template <class T> inline void Smoother2D<T>::func( vartype var ) \
{ convolver_.func( var ); }

mImplSetFunc( setProgressMeter, ProgressMeter* );
mImplSetFunc( enableWorkControl, bool);
mImplSetFunc( controlWork, Task::Control);

template <class T> inline
bool Smoother2D<T>::execute()
{
    const Array2D<float>* input = convolver_.getX();
    if ( !input )
        return false;

    if ( !window_ )
    {
        PtrMan<WindowFunction> wf = WINFUNCS().create( windowname_ );
        if ( !wf )
            return false;

        if ( wf->hasVariable() &&
                (mIsUdf(windowparam_) || !wf->setVariable( windowparam_ ) ) )
            return false;

        if ( windowsz0_<=0 || windowsz1_<=0 )
            return false;

        //Can we setup for fft? If so, all volumes should have same size
        if ( typeid(T)==typeid(float) && input->getData() && !hasudf_ )
            window_ = new Array2DImpl<T>( input->info() );
        else
            window_ = new Array2DImpl<T>( windowsz0_, windowsz1_ );

        if ( !window_->isOK() )
            return false;

        const float hwinsz0 = ((float)windowsz0_)/2;
        const float hwinsz1 = ((float)windowsz1_)/2;
        Coord pos;

        const int sz0 = window_->info().getSize( 0 );
        const int sz1 = window_->info().getSize( 1 );
        const int hsz0 = sz0/2;
        const int hsz1 = sz1/2;

        double weightsum = 0;

        for ( int idx0=0; idx0<sz0; idx0++ )
        {
            const float pos0 = mCast( float, idx0>hsz0 ? idx0-sz0 : idx0 );
            pos[0] = pos0/hwinsz0;
            for ( int idx1=0; idx1<sz1; idx1++ )
            {
                const float pos1 = mCast( float, idx1>hsz1 ? idx1-sz1 : idx1 );
                pos[1] = pos1/hwinsz1;
                const float weight = wf->getValue( (float) pos.abs() );
                window_->set( idx0, idx1, weight );
                weightsum += weight;
            }
        }

        if ( weightsum>1 )
            mDoArrayPtrOperation( float, window_->getData(), /= (float)weightsum,
                        window_->info().getTotalSz(), ++ );

        convolver_.setY( *window_, false );
    }

    return convolver_.execute();
}


template <class T> inline
Task::Control Smoother2D<T>::getState() const
{ return convolver_.getState(); }

#endif