/*
 * Copyright 2007 Sun Microsystems, Inc.  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
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any 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);
	}
}