1 /* 2 * Copyright 2007 Sun Microsystems, Inc. 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. Sun designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 22 * CA 95054 USA or visit www.sun.com if you need additional information or 23 * have any questions. 24 */ 25 26 /* @test 27 @summary Test ModelStandardTransform transform method */ 28 29 import com.sun.media.sound.ModelStandardTransform; 30 31 public class TransformLinear { 32 checkLinearity(ModelStandardTransform transform)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 assertTrue(boolean value)59 private static void assertTrue(boolean value) throws Exception 60 { 61 if(!value) 62 throw new RuntimeException("assertTrue fails!"); 63 } 64 main(String[] args)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 } 91