SF_TimeShift.java

/* For Copyright and License see LICENSE.txt and COPYING.txt in the root directory */
package com.nerdscentral.audio.time;

import java.util.List;

import com.nerdscentral.audio.core.SFConstants;
import com.nerdscentral.audio.core.SFSignal;
import com.nerdscentral.sython.Caster;
import com.nerdscentral.sython.SFPL_Operator;
import com.nerdscentral.sython.SFPL_RuntimeException;

public class SF_TimeShift implements SFPL_Operator
{

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @Override
    public Object Interpret(final Object input) throws SFPL_RuntimeException
    {
        List<Object> lin = Caster.makeBunch(input);
        SFSignal in = Caster.makeSFSignal(lin.get(0));
        SFSignal shift = Caster.makeSFSignal(lin.get(1));
        SFSignal y = in.replicateEmpty();
        int length = y.getLength();
        if (shift.getLength() < length) length = shift.getLength();
        for (int index = 0; index < length; ++index)
        {
            double pos = index + SFConstants.SAMPLE_RATE_MS * shift.getSample(index);
            y.setSample(index, in.getSampleCubic(pos));
        }
        length = y.getLength();
        for (int index = shift.getLength(); index < length; ++length)
        {
            y.setSample(index, in.getSample(index));
        }
        return y;
    }

    @Override
    public String Word()
    {
        return Messages.getString("SF_TimeShift.0"); //$NON-NLS-1$
    }

}