1 /*
   2  * Copyright (c) 2007, 2015, 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    @modules java.desktop/com.sun.media.sound
  27 */
  28 
  29 import com.sun.media.sound.ModelStandardTransform;
  30 
  31 public class TransformLinear {
  32 
  33     private static boolean checkLinearity(ModelStandardTransform transform)
  34     {
  35         double lastx = 0;
  36         for (int p = 0; p < 2; p++)
  37         for (int d = 0; d < 2; d++)
  38         for (double i = 0; i < 1.0; i+=0.001) {
  39             if(p == 0)
  40                 transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);
  41             else
  42                 transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);
  43             if(d == 0)
  44                 transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);
  45             else
  46                 transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);
  47             double x = transform.transform(i);
  48             if(i == 0)
  49                 lastx = x;
  50             else
  51             {
  52                 if(lastx - x > 0.2) return false;
  53                 lastx = x;
  54             }
  55         }
  56         return true;
  57     }
  58 
  59     private static void assertTrue(boolean value) throws Exception
  60     {
  61         if(!value)
  62             throw new RuntimeException("assertTrue fails!");
  63     }
  64 
  65     public static void main(String[] args) throws Exception {
  66         ModelStandardTransform transform = new ModelStandardTransform();
  67         transform.setTransform(ModelStandardTransform.TRANSFORM_LINEAR);
  68         assertTrue(checkLinearity(transform));
  69 
  70         transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);
  71         transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);
  72         assertTrue(Math.abs(transform.transform(0.2f) - 0.2f) < 0.0001f);
  73         assertTrue(Math.abs(transform.transform(0.8f) - 0.8f) < 0.0001f);
  74 
  75         transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);
  76         transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);
  77         assertTrue(Math.abs(transform.transform(0.2f) - 0.8f) < 0.0001f);
  78         assertTrue(Math.abs(transform.transform(0.8f) - 0.2f) < 0.0001f);
  79 
  80         transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);
  81         transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);
  82         assertTrue(Math.abs(transform.transform(0.2f) - (-0.6f)) < 0.0001f);
  83         assertTrue(Math.abs(transform.transform(0.8f) - (0.6f)) < 0.0001f);
  84 
  85         transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);
  86         transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);
  87         assertTrue(Math.abs(transform.transform(0.2f) - (0.6f)) < 0.0001f);
  88         assertTrue(Math.abs(transform.transform(0.8f) - (-0.6f)) < 0.0001f);
  89     }
  90 }