SpectralShapeShift.cxx

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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
 *
 */

#include "SpectralShapeShift.hxx"
#include "ProcessingFactory.hxx"

namespace CLAM
{
namespace Hidden
{
        static const char * metadata[] = {
                "key", "SpectralShapeShift",
        //      "category", "Spectral Transformations",
        //      "description", "SpectralShapeShift",
                0
        };
        static FactoryRegistrator<ProcessingFactory, SpectralShapeShift> reg = metadata;
}
        
bool SpectralShapeShift::Do(const Spectrum& 
                        inSpec,Spectrum& outSpec)
{

        if (!mConfig.GetPreserveOuts())
        {
                outSpec = inSpec; //TODO big cludge for streaming
        }
        
        mLogSpectrum = inSpec;
        mLogSpectrum.ToDB();

        mSpectralEnvelope.SetSpectralRange(mSpectralRange);
        
        mSpectralPeakDetect.Do(mLogSpectrum, mSpectralPeaks);
        mSpectralEnvelopeExtract.Do(mSpectralPeaks,mSpectralEnvelope);

        TData amount = mSteps.GetLastValue();

        //Shift spectral shape
        BPF& magBPF=mSpectralEnvelope.GetMagBPF();
        int nPoints=magBPF.Size();
        if(nPoints>2)
        {
                magBPF.SetIntpType(EInterpolation::eLinear);
                for(int i=0;i<nPoints;i++)
                {
                        magBPF.SetXValue(i, magBPF.GetXValue(i)+amount);
                }
                //magBPF.UpdateSplineTable();
                //Apply new spectral shape 
                outSpec.ToDB();
                mSpectralEnvelopeApply.Do(mLogSpectrum,mSpectralEnvelope,outSpec);
                outSpec.ToLinear();
        }
        return true;
}


}