1 /*
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   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
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   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /* @test
  27    @summary Test ModelStandardTransform transform method */
  28 
  29 import com.sun.media.sound.ModelStandardTransform;
  30 
  31 public class TransformConcave {
  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_CONCAVE);
  68         assertTrue(checkLinearity(transform));
  69 
  70         transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);
  71         transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);
  72         assertTrue(Math.abs(transform.transform(0.0f) - 0.0f) < 0.0001f);
  73         assertTrue(transform.transform(0.5f) < 0.5f);
  74         assertTrue(Math.abs(transform.transform(1.0f) - 1.0f) < 0.0001f);
  75 
  76         transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);
  77         transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);
  78         assertTrue(Math.abs(transform.transform(1.0f) - 0.0f) < 0.0001f);
  79         assertTrue(transform.transform(0.5f) < 0.5f);
  80         assertTrue(Math.abs(transform.transform(0.0f) - 1.0f) < 0.0001f);
  81 
  82         transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);
  83         transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);
  84         assertTrue(Math.abs(transform.transform(0.0f) + 1.0f) < 0.0001f);
  85         assertTrue(transform.transform(0.25f) > -0.5f);
  86         assertTrue(Math.abs(transform.transform(0.5f) - 0.0f) < 0.0001f);
  87         assertTrue(transform.transform(0.75f) < 0.5f);
  88         assertTrue(Math.abs(transform.transform(1.0f) - 1.0f) < 0.0001f);
  89 
  90         transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);
  91         transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);
  92         assertTrue(Math.abs(transform.transform(1.0f) + 1.0f) < 0.0001f);
  93         assertTrue(transform.transform(0.75f) > -0.5f);
  94         assertTrue(Math.abs(transform.transform(0.50f) - 0.0f) < 0.0001f);
  95         assertTrue(transform.transform(0.25f) < 0.5f);
  96         assertTrue(Math.abs(transform.transform(0.0f) - 1.0f) < 0.0001f);
  97     }
  98 }