SMSPitchDiscretization.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 "SMSPitchDiscretization.hxx"
#include "ProcessingFactory.hxx"



namespace CLAM
{


namespace Hidden
{       
        static const char * metadata[] = {
                "key", "SMSPitchDiscretization",
                "category", "SMS Transformations",
                "description", "SMSPitchDiscretization",
                0
        };
        static FactoryRegistrator<ProcessingFactory, SMSPitchDiscretization> reg = metadata;
}

bool SMSPitchDiscretization::Do(const Frame& in, Frame& out)
{
        return Do(in.GetSpectralPeakArray(), 
                  in.GetFundamental(), 
                  in.GetSpectrum(), 
                
                  out.GetSpectralPeakArray(), 
                  out.GetFundamental(), 
                  out.GetSpectrum() 
        );
}

bool SMSPitchDiscretization::Do(const SpectralPeakArray& inPeaks, 
                                const Fundamental& inFund, 
                                const Spectrum& inSpectrum, 
                                SpectralPeakArray& outPeaks, 
                                Fundamental& outFund,
                                Spectrum& outSpectrum
                                )
{
        outPeaks = inPeaks;
        outFund = inFund;
        outSpectrum = inSpectrum;
        
        TData pitch = inFund.GetFreq();

        if (pitch>0)
        {
                TData log2=0.69314718f;

                int nst = Round(12*log(pitch/55)/log2);
                TData pow2_1_12=1.0594630f;
                TData discPitch=55*(CLAM_pow(pow2_1_12,nst));
                
                TData amount=discPitch/pitch;

                SendFloatToInControl(mPitchShift,"PitchSteps",amount);
                mPitchShift.Do( inPeaks, 
                                inFund, 
                                inSpectrum, 
                                outPeaks, 
                                outFund, 
                                outSpectrum);
                
                Fundamental tmpFund;
                tmpFund.AddElem(discPitch);
                outFund = tmpFund;
        }
        return true;
}


}