J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999-2003 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 | package sun.audio; |
| 27 | |
| 28 | import java.util.Vector; |
| 29 | import java.util.Enumeration; |
| 30 | import java.io.IOException; |
| 31 | import java.io.InputStream; |
| 32 | import java.io.OutputStream; |
| 33 | import java.io.FileOutputStream; |
| 34 | |
| 35 | import java.security.AccessController; |
| 36 | import java.security.PrivilegedAction; |
| 37 | |
| 38 | |
| 39 | /** |
| 40 | * This class provides an interface to play audio streams. |
| 41 | * |
| 42 | * To play an audio stream use: |
| 43 | * <pre> |
| 44 | * AudioPlayer.player.start(audiostream); |
| 45 | * </pre> |
| 46 | * To stop playing an audio stream use: |
| 47 | * <pre> |
| 48 | * AudioPlayer.player.stop(audiostream); |
| 49 | * </pre> |
| 50 | * To play an audio stream from a URL use: |
| 51 | * <pre> |
| 52 | * AudioStream audiostream = new AudioStream(url.openStream()); |
| 53 | * AudioPlayer.player.start(audiostream); |
| 54 | * </pre> |
| 55 | * To play a continuous sound you first have to |
| 56 | * create an AudioData instance and use it to construct a |
| 57 | * ContinuousAudioDataStream. |
| 58 | * For example: |
| 59 | * <pre> |
| 60 | * AudioData data = new AudioStream(url.openStream()).getData(); |
| 61 | * ContinuousAudioDataStream audiostream = new ContinuousAudioDataStream(data); |
| 62 | * AudioPlayer.player.start(audiostream); |
| 63 | * </pre> |
| 64 | * |
| 65 | * @see AudioData |
| 66 | * @see AudioDataStream |
| 67 | * @see AudioDevice |
| 68 | * @see AudioStream |
| 69 | * @author Arthur van Hoff, Thomas Ball |
| 70 | */ |
| 71 | |
| 72 | public |
| 73 | class AudioPlayer extends Thread { |
| 74 | |
| 75 | private AudioDevice devAudio; |
| 76 | private static boolean DEBUG = false /*true*/; |
| 77 | |
| 78 | /** |
| 79 | * The default audio player. This audio player is initialized |
| 80 | * automatically. |
| 81 | */ |
| 82 | public static final AudioPlayer player = getAudioPlayer(); |
| 83 | |
| 84 | private static ThreadGroup getAudioThreadGroup() { |
| 85 | |
| 86 | if(DEBUG) { System.out.println("AudioPlayer.getAudioThreadGroup()"); } |
| 87 | ThreadGroup g = currentThread().getThreadGroup(); |
| 88 | while ((g.getParent() != null) && |
| 89 | (g.getParent().getParent() != null)) { |
| 90 | g = g.getParent(); |
| 91 | } |
| 92 | return g; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Create an AudioPlayer thread in a privileged block. |
| 97 | */ |
| 98 | |
| 99 | private static AudioPlayer getAudioPlayer() { |
| 100 | |
| 101 | if(DEBUG) { System.out.println("> AudioPlayer.getAudioPlayer()"); } |
| 102 | AudioPlayer audioPlayer; |
| 103 | PrivilegedAction action = new PrivilegedAction() { |
| 104 | public Object run() { |
| 105 | Thread t = new AudioPlayer(); |
| 106 | t.setPriority(MAX_PRIORITY); |
| 107 | t.setDaemon(true); |
| 108 | t.start(); |
| 109 | return t; |
| 110 | } |
| 111 | }; |
| 112 | audioPlayer = (AudioPlayer) AccessController.doPrivileged(action); |
| 113 | return audioPlayer; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Construct an AudioPlayer. |
| 118 | */ |
| 119 | private AudioPlayer() { |
| 120 | |
| 121 | super(getAudioThreadGroup(), "Audio Player"); |
| 122 | if(DEBUG) { System.out.println("> AudioPlayer private constructor"); } |
| 123 | devAudio = AudioDevice.device; |
| 124 | devAudio.open(); |
| 125 | if(DEBUG) { System.out.println("< AudioPlayer private constructor completed"); } |
| 126 | } |
| 127 | |
| 128 | |
| 129 | /** |
| 130 | * Start playing a stream. The stream will continue to play |
| 131 | * until the stream runs out of data, or it is stopped. |
| 132 | * @see AudioPlayer#stop |
| 133 | */ |
| 134 | public synchronized void start(InputStream in) { |
| 135 | |
| 136 | if(DEBUG) { |
| 137 | System.out.println("> AudioPlayer.start"); |
| 138 | System.out.println(" InputStream = " + in); |
| 139 | } |
| 140 | devAudio.openChannel(in); |
| 141 | notify(); |
| 142 | if(DEBUG) { |
| 143 | System.out.println("< AudioPlayer.start completed"); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Stop playing a stream. The stream will stop playing, |
| 149 | * nothing happens if the stream wasn't playing in the |
| 150 | * first place. |
| 151 | * @see AudioPlayer#start |
| 152 | */ |
| 153 | public synchronized void stop(InputStream in) { |
| 154 | |
| 155 | if(DEBUG) { |
| 156 | System.out.println("> AudioPlayer.stop"); |
| 157 | } |
| 158 | |
| 159 | devAudio.closeChannel(in); |
| 160 | if(DEBUG) { |
| 161 | System.out.println("< AudioPlayer.stop completed"); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Main mixing loop. This is called automatically when the AudioPlayer |
| 167 | * is created. |
| 168 | */ |
| 169 | public void run() { |
| 170 | |
| 171 | // $$jb: 06.24.99: With the JS API, mixing is no longer done by AudioPlayer |
| 172 | // or AudioDevice ... it's done by the API itself, so this bit of legacy |
| 173 | // code does nothing. |
| 174 | // $$jb: 10.21.99: But it appears that some legacy applications |
| 175 | // check to see if this thread is alive or not, so we need to spin here. |
| 176 | |
| 177 | devAudio.play(); |
| 178 | if(DEBUG) { |
| 179 | System.out.println("AudioPlayer mixing loop."); |
| 180 | } |
| 181 | while(true) { |
| 182 | try{ |
| 183 | Thread.sleep(5000); |
| 184 | //wait(); |
| 185 | } catch(Exception e) { |
| 186 | break; |
| 187 | // interrupted |
| 188 | } |
| 189 | } |
| 190 | if(DEBUG) { |
| 191 | System.out.println("AudioPlayer exited."); |
| 192 | } |
| 193 | |
| 194 | } |
| 195 | } |