/*

 * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 * questions.

 */

/* @test

   @summary Test ModelStandardTransform transform method */

import com.sun.media.sound.ModelStandardTransform;

public class TransformLinear {

    private static boolean checkLinearity(ModelStandardTransform transform)

    {

        double lastx = 0;

        for (int p = 0; p < 2; p++)

        for (int d = 0; d < 2; d++)

        for (double i = 0; i < 1.0; i+=0.001) {

            if(p == 0)

                transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);

            else

                transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);

            if(d == 0)

                transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);

            else

                transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);

            double x = transform.transform(i);

            if(i == 0)

                lastx = x;

            else

            {

                if(lastx - x > 0.2) return false;

                lastx = x;

            }

        }

        return true;

    }

    private static void assertTrue(boolean value) throws Exception

    {

        if(!value)

            throw new RuntimeException("assertTrue fails!");

    }

    public static void main(String[] args) throws Exception {

        ModelStandardTransform transform = new ModelStandardTransform();

        transform.setTransform(ModelStandardTransform.TRANSFORM_LINEAR);

        assertTrue(checkLinearity(transform));

        transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);

        transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);

        assertTrue(Math.abs(transform.transform(0.2f) - 0.2f) < 0.0001f);

        assertTrue(Math.abs(transform.transform(0.8f) - 0.8f) < 0.0001f);

        transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);

        transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);

        assertTrue(Math.abs(transform.transform(0.2f) - 0.8f) < 0.0001f);

        assertTrue(Math.abs(transform.transform(0.8f) - 0.2f) < 0.0001f);

        transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);

        transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);

        assertTrue(Math.abs(transform.transform(0.2f) - (-0.6f)) < 0.0001f);

        assertTrue(Math.abs(transform.transform(0.8f) - (0.6f)) < 0.0001f);

        transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);

        transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);

        assertTrue(Math.abs(transform.transform(0.2f) - (0.6f)) < 0.0001f);

        assertTrue(Math.abs(transform.transform(0.8f) - (-0.6f)) < 0.0001f);

    }

}