test.uk.co.modularaudio.util.audio.math.DbToLevelChecker.java Source code

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Here is the source code for test.uk.co.modularaudio.util.audio.math.DbToLevelChecker.java

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/**
 *
 * Copyright (C) 2015 - Daniel Hams, Modular Audio Limited
 *                      daniel.hams@gmail.com
 *
 * Mad 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 3 of the License, or
 * (at your option) any later version.
 *
 * Mad 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 Mad.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package test.uk.co.modularaudio.util.audio.math;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import uk.co.modularaudio.util.audio.math.MixdownSliderDbToLevelComputer;
import uk.co.modularaudio.util.math.MathFormatter;

public class DbToLevelChecker {
    private static Log log = LogFactory.getLog(DbToLevelChecker.class.getName());

    private final static int NUM_DEC = 4;

    public DbToLevelChecker() {
    }

    public void go() throws Exception {
        final MixdownSliderDbToLevelComputer dbc = new MixdownSliderDbToLevelComputer(100);

        final float[] testValues = new float[] { 10.0f, 0.0f, -88.0f, -89.0f, -89.9f, -89.9999f, -90.0f,
                Float.NEGATIVE_INFINITY, -6.01f };

        for (final float v : testValues) {
            final float step = dbc.toStepFromDb(v);
            log.debug("Value (" + MathFormatter.fastFloatPrint(v, NUM_DEC, true) + ") -> step("
                    + MathFormatter.fastFloatPrint(step, NUM_DEC, true) + ")");
            final float nv = dbc.toNormalisedSliderLevelFromDb(v);

            log.debug("Value (" + MathFormatter.fastFloatPrint(v, NUM_DEC, true) + ") -> ("
                    + MathFormatter.fastFloatPrint(nv, NUM_DEC, true) + ")");

            final float abv = dbc.toDbFromNormalisedLevel(nv);

            log.debug("AndBa (" + MathFormatter.fastFloatPrint(nv, NUM_DEC, true) + ") -> ("
                    + MathFormatter.fastFloatPrint(abv, NUM_DEC, true) + ")");
        }
    }

    public static void main(final String[] args) throws Exception {
        final DbToLevelChecker dtlc = new DbToLevelChecker();
        dtlc.go();
    }
}