1 /*
   2  * Copyright (c) 2009, 2013, 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 SoftLowFrequencyOscillator processControlLogic method */
  26 
  27 import com.sun.media.sound.AudioSynthesizerPropertyInfo;
  28 import com.sun.media.sound.SoftLowFrequencyOscillator;
  29 import com.sun.media.sound.SoftSynthesizer;
  30 
  31 public class TestProcessControlLogic {
  32 
  33     private static float control_rate = 147f;
  34     private static SoftSynthesizer synth = new SoftSynthesizer();
  35     private static SoftLowFrequencyOscillator lfo = new SoftLowFrequencyOscillator();
  36 
  37     private static void testLFO(boolean shared, int instance, float freq, float delay,
  38             float delay2) throws Exception {
  39         SoftLowFrequencyOscillator lfo =
  40             shared?TestProcessControlLogic.lfo:new SoftLowFrequencyOscillator();
  41         lfo.reset();
  42         double[] lfo_freq = lfo.get(instance, "freq");
  43         double[] lfo_delay = lfo.get(instance, "delay");
  44         double[] lfo_delay2 = lfo.get(instance, "delay2");
  45         double[] lfo_output = lfo.get(instance, null);
  46         lfo_freq[0] = freq;
  47         lfo_delay[0] = delay;
  48         lfo_delay2[0] = delay2;
  49         lfo.init(synth);
  50 
  51         // For delayCount amount time, the output LFO should be 0.5
  52         int delayCount = (int) ((Math.pow(2, delay / 1200.0) * control_rate));
  53         delayCount += (int) ((delay2 * control_rate) / 1000.0);
  54         for (int i = 0; i < delayCount; i++) {
  55             if (Math.abs(0.5 - lfo_output[0]) > 0.000001)
  56                 throw new Exception("Incorrect LFO output ("
  57                         +"0.5 != "+lfo_output[0]+")!");
  58             lfo.processControlLogic();
  59         }
  60 
  61         // After the delay the LFO should start oscillate
  62         // Let make sure output is accurate enough
  63         double p_step = (440.0 / control_rate)
  64         * Math.exp((freq - 6900.0) * (Math.log(2) / 1200.0));
  65         double p = 0;
  66         for (int i = 0; i < 30; i++) {
  67             p += p_step;
  68             double predicted_output = 0.5 + Math.sin(p * 2 * Math.PI) * 0.5;
  69             if (Math.abs(predicted_output - lfo_output[0]) > 0.001)
  70                 throw new Exception("Incorrect LFO output ("
  71                         +predicted_output+" != "+lfo_output[0]+")!");
  72             lfo.processControlLogic();
  73         }
  74 
  75     }
  76 
  77     public static void main(String[] args) throws Exception {
  78 
  79         // Get default control rate from synthesizer
  80         AudioSynthesizerPropertyInfo[] p = synth.getPropertyInfo(null);
  81         for (int i = 0; i < p.length; i++) {
  82             if (p[i].name.equals("control rate")) {
  83                 control_rate = ((Float) p[i].value).floatValue();
  84                 break;
  85             }
  86         }
  87 
  88         // Test LFO under various configurations
  89         for (int instance = 0; instance < 3; instance++)
  90             for (int d1 = -3000; d1 < 0; d1 += 1000)
  91                 for (int d2 = 0; d2 < 5000; d2 += 1000)
  92                     for (int fr = -1000; fr < 1000; fr += 100) {
  93                         testLFO(true, instance,
  94                                 (fr == -1000) ? Float.NEGATIVE_INFINITY : fr,
  95                                 (d1 == -3000) ? Float.NEGATIVE_INFINITY : d1,
  96                                 d2);
  97                         testLFO(false, instance,
  98                                 (fr == -1000) ? Float.NEGATIVE_INFINITY : fr,
  99                                 (d1 == -3000) ? Float.NEGATIVE_INFINITY : d1,
 100                                 d2);
 101                     }
 102 
 103     }
 104 }