ScaleCnv.hxx

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/*
 * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef _ScaleCnv_
#define _ScaleCnv_

#include "Array.hxx"
#include "Spectrum.hxx"
#include "SpectralPeakArray.hxx"

namespace CLAM {

template <class T> class ScaleCnv
{
public:

/* Constructors and destructors */
        ScaleCnv(){};
        ~ScaleCnv(){};

/* Converting routines */
        void Convert(DataArray<T>& inputArray,
                DataArray<T>& outputArray,EScaleType oScaleType=eUnknown)// non-destructive overload
        {
                if(oScaleType==0) oScaleType=outputArray.GetScale();
                if(inputArray.GetScale()!=oScaleType)
                {
                        if(inputArray.GetScale()==eLinear)
                        {
                                ConvertTodB(inputArray,outputArray,(int)oScaleType);
                        }
                        else if(oScaleType==eLinear)
                        {
                                ConvertToLin(inputArray,outputArray,inputArray.GetScale());
                        }
                        else
                        {
                                double factor = ((double)oScaleType)/((double)inputArray.GetScale());
                                for(int i=0;i<inputArray.Size();i++)
                                {
                                        outputArray[i]=inputArray[i]*factor;
                                }
                        }
                }
                if(outputArray.GetScale() != oScaleType) outputArray.SetScale(oScaleType);
        }

        void Convert(DataArray<T>& array,EScaleType oDataType)//destructive overload
        {
                Convert(array,array,oDataType);
        }

        /* Scale convert for a Spectrum */
        void Convert(Spectrum &inputSpectrum, 
                                 Spectrum &outputSpectrum, EScaleType oScaleType=eUnknown)
        {
                if(oScaleType==0) oScaleType=outputSpectrum.GetScale();
                CLAM_ASSERT(inputSpectrum.GetSpectrum() == eMagPhase,
                        "ScaleConv::Convert: spectrum must be eMagPhase"); 
                // Other Spectrum types should be implemented

                Convert(inputSpectrum.GetRefToMagBuffer(), outputSpectrum.GetRefToMagBuffer(), oScaleType);
                outputSpectrum.SetScale(oScaleType);
        }
        
        void Convert(Spectrum &spectrum, EScaleType oScaleType)
        {
                Convert(spectrum,spectrum,oScaleType);
        }

        /* Scale convert for a Peak Array */
        void Convert(SpectralPeakArray &inputPeakArray, 
                                 SpectralPeakArray &outputPeakArray, EScaleType oScaleType=eUnknown)
        {
                if(oScaleType==0) oScaleType=outputPeakArray.GetScale();         
                Convert(inputPeakArray.GetRefToPeakArray(), outputPeakArray.GetRefToPeakArray(), oScaleType);
                outputPeakArray.SetScale(oScaleType);
        }
        
        void Convert(SpectralPeakArray &spectrum, EScaleType oScaleType)
        {
                Convert(spectrum,spectrum,oScaleType);
        }
                        
private:
                
        void ConvertTodB(const DataArray<T>& inputArray,
                DataArray<T>& outputArray,int scalingFactor)//non-destructive dB conv.
        {
                outputArray=inputArray;
                ConvertTodB(outputArray,scalingFactor);
        }
        
        void ConvertTodB(DataArray<T>& array,int scalingFactor)//destructive dB conv.
        {
                array.Apply(DB,(scalingFactor));
        }

        void ConvertToLin(const Array<T>& inputArray,
                Array<T>& outputArray,int scalingFactor)//non-destructive lin conv.
        {
                outputArray=inputArray;
                ConvertToLin(outputArray,scalingFactor);
        }

        void ConvertToLin(Array<T>& array,int scalingFactor)//destruct. lin. conv.
        {
                array.Apply(Lin,scalingFactor);
        }
        
};

}

#endif

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