SMSPitchShift.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 "SMSPitchShift.hxx"
#include "ProcessingFactory.hxx"


namespace CLAM
{

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

bool SMSPitchShift::Do(const SpectralPeakArray& inPeaks,
                const Fundamental& inFund, 
                const Spectrum& inRes, 
                SpectralPeakArray& outPeaks,
                Fundamental& outFund,
                Spectrum& outRes)
{
        bool ignoreResidual = mIgnoreResidual.GetLastValue()>0.;
        if (!mConfig.GetPreserveOuts()) //TODO big cludge for streaming
        {
                outPeaks = inPeaks; 
                outFund = inFund;
                if (!ignoreResidual)
                        outRes = inRes;
        }

        TData amount = mPitchSteps.GetLastValue();
        if(amount==1)//no pitch shift
                return true;
        
        TData spectralRange = inRes.GetSpectralRange();
        TData fundamental = inFund.GetFreq(0);
        bool isHarmonic = fundamental > .5;
        mIsHarmonic.DoControl( isHarmonic );

        for (int i=0;i<inFund.GetnCandidates();i++)
                outFund.SetFreq(i,inFund.GetFreq(i)*amount);

        mSpectralEnvelope.SetSpectralRange(spectralRange);
        
        bool haveEnvelope=false;

        //First extract spectral envelope
        if(isHarmonic)
                haveEnvelope = mSpectralEnvelopeExtract.Do(inPeaks,mSpectralEnvelope);

        if(&outPeaks!=&inPeaks)//TODO: this is already solved inPeaks new DT
                outPeaks=inPeaks;
        DataArray& iFreqArray=inPeaks.GetFreqBuffer();
        DataArray& oFreqArray=outPeaks.GetFreqBuffer();
        DataArray& iBinPosArray=inPeaks.GetBinPosBuffer();
        DataArray& oBinPosArray=outPeaks.GetBinPosBuffer();
        TSize nPeaks=inPeaks.GetnPeaks();
        
        //Shift all peaks
        for(int i=0;i<nPeaks;i++)
        {
                TData newFreq=iFreqArray[i]*amount;
                if (newFreq>=spectralRange)
                {
                        outPeaks.SetnPeaks(i);
                        break;
                }
                oFreqArray[i]=newFreq;
                oBinPosArray[i]=iBinPosArray[i]*amount;
        }

        //Apply original spectral shape and comb filter the residual
        if (isHarmonic)
        {
                if (haveEnvelope)
                        mSpectralEnvelopeApply.Do(outPeaks,mSpectralEnvelope,outPeaks);
                if (false && !ignoreResidual)
                {
                        mFDCombFilter.mFreq.DoControl(fundamental*amount);
                        mFDCombFilter.Do(inRes,outRes);
                }
        }
        return true;
}

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


}