1 /* 2 * Copyright (c) 2002, 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.spi.MixerProvider; 30 31 32 /** 33 * DirectAudioDevice provider. 34 * 35 * @author Florian Bomers 36 */ 37 public final class DirectAudioDeviceProvider extends MixerProvider { 38 39 // STATIC VARIABLES 40 41 /** 42 * Set of info objects for all port input devices on the system. 43 */ 44 private static DirectAudioDeviceInfo[] infos; 45 46 /** 47 * Set of all port input devices on the system. 48 */ 49 private static DirectAudioDevice[] devices; 50 51 52 // STATIC 53 54 static { 55 // initialize 56 Platform.initialize(); 57 } 58 59 60 // CONSTRUCTOR 61 62 63 /** 64 * Required public no-arg constructor. 65 */ 66 public DirectAudioDeviceProvider() { 67 synchronized (DirectAudioDeviceProvider.class) { 68 if (Platform.isDirectAudioEnabled()) { 69 init(); 70 } else { 71 infos = new DirectAudioDeviceInfo[0]; 72 devices = new DirectAudioDevice[0]; 73 } 74 } 75 } 76 77 private static void init() { 78 // get the number of input devices 79 int numDevices = nGetNumDevices(); 80 81 if (infos == null || infos.length != numDevices) { 82 if (Printer.trace) Printer.trace("DirectAudioDeviceProvider: init()"); 83 // initialize the arrays 84 infos = new DirectAudioDeviceInfo[numDevices]; 85 devices = new DirectAudioDevice[numDevices]; 86 87 // fill in the info objects now. 88 for (int i = 0; i < infos.length; i++) { 89 infos[i] = nNewDirectAudioDeviceInfo(i); 90 } 91 if (Printer.trace) Printer.trace("DirectAudioDeviceProvider: init(): found numDevices: " + numDevices); 92 } 93 } 94 95 public Mixer.Info[] getMixerInfo() { 96 synchronized (DirectAudioDeviceProvider.class) { 97 Mixer.Info[] localArray = new Mixer.Info[infos.length]; 98 System.arraycopy(infos, 0, localArray, 0, infos.length); 99 return localArray; 100 } 101 } 102 103 104 public Mixer getMixer(Mixer.Info info) { 105 synchronized (DirectAudioDeviceProvider.class) { 106 // if the default device is asked, we provide the mixer 107 // with SourceDataLine's 108 if (info == null) { 109 for (int i = 0; i < infos.length; i++) { 110 Mixer mixer = getDevice(infos[i]); 111 if (mixer.getSourceLineInfo().length > 0) { 112 return mixer; 113 } 114 } 115 } 116 // otherwise get the first mixer that matches 117 // the requested info object 118 for (int i = 0; i < infos.length; i++) { 119 if (infos[i].equals(info)) { 120 return getDevice(infos[i]); 121 } 122 } 123 } 124 throw new IllegalArgumentException("Mixer " + info.toString() + " not supported by this provider."); 125 } 126 127 128 private static Mixer getDevice(DirectAudioDeviceInfo info) { 129 int index = info.getIndex(); 130 if (devices[index] == null) { 131 devices[index] = new DirectAudioDevice(info); 132 } 133 return devices[index]; 134 } 135 136 // INNER CLASSES 137 138 139 /** 140 * Info class for DirectAudioDevices. Adds an index value and a string for 141 * making native references to a particular device. 142 * This constructor is called from native. 143 */ 144 static final class DirectAudioDeviceInfo extends Mixer.Info { 145 private final int index; 146 private final int maxSimulLines; 147 148 // For ALSA, the deviceID contains the encoded card index, device index, and sub-device-index 149 private final int deviceID; 150 151 private DirectAudioDeviceInfo(int index, int deviceID, int maxSimulLines, 152 String name, String vendor, 153 String description, String version) { 154 super(name, vendor, "Direct Audio Device: "+description, version); 155 this.index = index; 156 this.maxSimulLines = maxSimulLines; 157 this.deviceID = deviceID; 158 } 159 160 int getIndex() { 161 return index; 162 } 163 164 int getMaxSimulLines() { 165 return maxSimulLines; 166 } 167 168 int getDeviceID() { 169 return deviceID; 170 } 171 } // class DirectAudioDeviceInfo 172 173 // NATIVE METHODS 174 private static native int nGetNumDevices(); 175 // index: [0..nGetNumDevices()-1] 176 private static native DirectAudioDeviceInfo nNewDirectAudioDeviceInfo(int deviceIndex); 177 }