1 /* 2 * Copyright (c) 2008, 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. 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 package com.sun.media.sound; 27 28 import javax.sound.sampled.Mixer; 29 import javax.sound.sampled.Mixer.Info; 30 import javax.sound.sampled.spi.MixerProvider; 31 32 /** 33 * Provider for software audio mixer. 34 * 35 * @author Karl Helgason 36 */ 37 public final class SoftMixingMixerProvider extends MixerProvider { 38 39 static SoftMixingMixer globalmixer = null; 40 41 static Thread lockthread = null; 42 43 static final Object mutex = new Object(); 44 45 @Override 46 public Mixer getMixer(Info info) { 47 if (!(info == null || info == SoftMixingMixer.info)) { 48 throw new IllegalArgumentException("Mixer " + info.toString() 49 + " not supported by this provider."); 50 } 51 synchronized (mutex) { 52 if (lockthread != null) 53 if (Thread.currentThread() == lockthread) 54 throw new IllegalArgumentException("Mixer " 55 + info.toString() 56 + " not supported by this provider."); 57 if (globalmixer == null) 58 globalmixer = new SoftMixingMixer(); 59 return globalmixer; 60 } 61 } 62 63 @Override 64 public Info[] getMixerInfo() { 65 return new Info[] { SoftMixingMixer.info }; 66 } 67 }