1 /* 2 * Copyright (c) 2002-2008 LWJGL Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * * Neither the name of 'LWJGL' nor the names of 17 * its contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 package org.lwjgl.openal; 33 34 import java.util.HashMap; 35 import java.util.Iterator; 36 37 /** 38 * The ALCdevice class represents a device opened in OpenAL space. 39 * 40 * ALC introduces the notion of a Device. A Device can be, depending on the 41 * implementation, a hardware device, or a daemon/OS service/actual server. This 42 * mechanism also permits different drivers (and hardware) to coexist within the same 43 * system, as well as allowing several applications to share system resources for audio, 44 * including a single hardware output device. The details are left to the implementation, 45 * which has to map the available backends to unique device specifiers. 46 * 47 * @author Brian Matzon <brian@matzon.dk> 48 * @version $Revision$ 49 * $Id$ 50 */ 51 public final class ALCdevice { 52 53 /** Address of actual device */ 54 final long device; 55 56 /** Whether this device is valid */ 57 private boolean valid; 58 59 /** List of contexts belonging to the device */ 60 private final HashMap<Long, ALCcontext> contexts = new HashMap<Long, ALCcontext>(); 61 62 /** 63 * Creates a new instance of ALCdevice 64 * 65 * @param device address of actual device 66 */ ALCdevice(long device)67 ALCdevice(long device) { 68 this.device = device; 69 this.valid = true; 70 } 71 72 /* 73 * @see java.lang.Object#equals(java.lang.Object) 74 */ equals(Object device)75 public boolean equals(Object device) { 76 if(device instanceof ALCdevice) { 77 return ((ALCdevice)device).device == this.device; 78 } 79 return super.equals(device); 80 } 81 82 /** 83 * Adds a context to the device 84 * 85 * @param context context to add to the list of contexts for this device 86 */ addContext(ALCcontext context)87 void addContext(ALCcontext context) { 88 synchronized (contexts) { 89 contexts.put(context.context, context); 90 } 91 } 92 93 /** 94 * Remove context associated with device 95 * 96 * @param context Context to disassociate with device 97 */ removeContext(ALCcontext context)98 void removeContext(ALCcontext context) { 99 synchronized (contexts) { 100 contexts.remove(context.context); 101 } 102 } 103 104 /** 105 * Marks this device and all of its contexts invalid 106 */ setInvalid()107 void setInvalid() { 108 valid = false; 109 synchronized (contexts) { 110 for ( ALCcontext context : contexts.values() ) 111 context.setInvalid(); 112 } 113 contexts.clear(); 114 } 115 116 /** 117 * @return true if this device is still valid 118 */ isValid()119 public boolean isValid() { 120 return valid; 121 } 122 } 123