SF_ShapedBiquadPeak.java

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

import java.util.List;

import com.nerdscentral.audio.core.SFSignal;
import com.nerdscentral.audio.pitch.algorithm.SFRBJFilter;
import com.nerdscentral.audio.pitch.algorithm.SFRBJFilter.FilterType;
import com.nerdscentral.sython.Caster;
import com.nerdscentral.sython.SFPL_Operator;
import com.nerdscentral.sython.SFPL_RuntimeException;

public class SF_ShapedBiquadPeak implements SFPL_Operator
{

    private static final long serialVersionUID = 1L;

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

    @Override
    public Object Interpret(Object input) throws SFPL_RuntimeException
    {
        List<Object> l = Caster.makeBunch(input);
        SFRBJFilter filter = new SFRBJFilter();
        SFSignal x = Caster.makeSFSignal(l.get(0));
        SFSignal frequency = Caster.makeSFSignal(l.get(1));
        SFSignal q = Caster.makeSFSignal(l.get(2));
        SFSignal db_gain = Caster.makeSFSignal(l.get(3));
        FilterType type = FilterType.PEAK;
        SFSignal y = x.replicateEmpty();
        int length = y.getLength();
        for (int index = 0; index < length; ++index)
        {
            if (index % 100 == 0)
            {
                filter.calc_filter_coeffs(type, frequency.getSample(index), q.getSample(index), db_gain.getSample(index));
            }
            y.setSample(index, filter.filter(x.getSample(index)));
        }
        return y;
    }
}