/* For Copyright and License see LICENSE.txt and COPYING.txt in the root directory */
package com.nerdscentral.audio.generators;
import com.nerdscentral.audio.core.SFConstants;
import com.nerdscentral.audio.core.SFData;
import com.nerdscentral.audio.core.SFSignal;
import com.nerdscentral.sython.Caster;
import com.nerdscentral.sython.SFMaths;
import com.nerdscentral.sython.SFPL_Operator;
import com.nerdscentral.sython.SFPL_RuntimeException;
public class SF_Hamming implements SFPL_Operator
{
private static final long serialVersionUID = 1L;
@Override
public String Word()
{
return Messages.getString("SF_Hamming.0"); //$NON-NLS-1$
}
@Override
public Object Interpret(Object input) throws SFPL_RuntimeException
{
double length = Caster.makeDouble(input);
length *= SFConstants.SAMPLE_RATE_MS;
length = SFMaths.ceil(length);
SFSignal out = SFData.build((int) length);
int Nminus1 = (int) (length - 1);
for (int n = 0; n < length; ++n)
{
out.setSample(n, 0.54 - 0.46 * SFMaths.cos(2 * SFMaths.PI * n / Nminus1));
}
return out;
}
}