TransformAbsolute.java revision 8729:0242fce0f717 
1/*
2 * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/* @test
25   @summary Test ModelStandardTransform transform method */
26
27import com.sun.media.sound.ModelStandardTransform;
28
29public class TransformAbsolute {
30
31    private static boolean checkLinearity(ModelStandardTransform transform)
32    {
33        double lastx = 0;
34        for (int p = 0; p < 2; p++)
35        for (int d = 0; d < 2; d++)
36        for (double i = 0; i < 1.0; i+=0.001) {
37            if(p == 0)
38                transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);
39            else
40                transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);
41            if(d == 0)
42                transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);
43            else
44                transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);
45            double x = transform.transform(i);
46            if(i == 0)
47                lastx = x;
48            else
49            {
50                if(lastx - x > 0.2) return false;
51                lastx = x;
52            }
53        }
54        return true;
55    }
56
57    private static void assertTrue(boolean value) throws Exception
58    {
59        if(!value)
60            throw new RuntimeException("assertTrue fails!");
61
62    }
63
64    public static void main(String[] args) throws Exception {
65        ModelStandardTransform transform = new ModelStandardTransform();
66        transform.setTransform(ModelStandardTransform.TRANSFORM_ABSOLUTE);
67        assertTrue(Math.abs(transform.transform(0.2f) - 0.2f) < 0.0001f);
68        assertTrue(Math.abs(transform.transform(-0.8f) - 0.8f) < 0.0001f);
69        assertTrue(checkLinearity(transform));
70    }
71}
72