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| 1 | /* | ||
| 2 | * Copyright (c) 1999, 2007, 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 java.util.Vector; | ||
| 29 | |||
| 30 | import javax.sound.sampled.AudioSystem; | ||
| 31 | import javax.sound.sampled.Control; | ||
| 32 | import javax.sound.sampled.Mixer; | ||
| 33 | import javax.sound.sampled.Line; | ||
| 34 | import javax.sound.sampled.LineEvent; | ||
| 35 | import javax.sound.sampled.LineListener; | ||
| 36 | import javax.sound.sampled.LineUnavailableException; | ||
| 37 | |||
| 38 | |||
| 39 | /** | ||
| 40 | * AbstractLine | ||
| 41 | * | ||
| 42 | * @author Kara Kytle | ||
| 43 | */ | ||
| 44 | abstract class AbstractLine implements Line { | ||
| 45 | |||
| 46 | protected Line.Info info; | ||
| 47 | protected Control[] controls; | ||
| 48 | protected AbstractMixer mixer; | ||
| 49 | private boolean open = false; | ||
| 50 | private Vector listeners = new Vector(); | ||
| 51 | |||
| 52 | /** | ||
| 53 | * Global event thread | ||
| 54 | */ | ||
| 55 | private static final EventDispatcher eventDispatcher; | ||
| 56 | |||
| 57 | static { | ||
| 58 | // create and start the global event thread | ||
| 59 | |||
| 60 | // $$kk: 12.21.98: | ||
| 61 | // 1) probably don't want a single global event queue | ||
| 62 | // 2) need a way to stop this thread when the engine is done | ||
| 63 | |||
| 64 | eventDispatcher = new EventDispatcher(); | ||
| 65 | eventDispatcher.start(); | ||
| 66 | } | ||
| 67 | |||
| 68 | |||
| 69 | /** | ||
| 70 | * Constructs a new AbstractLine. | ||
| 71 | * @param mixer the mixer with which this line is associated | ||
| 72 | * @param controls set of supported controls | ||
| 73 | */ | ||
| 74 | protected AbstractLine(Line.Info info, AbstractMixer mixer, Control[] controls) { | ||
| 75 | |||
| 76 | if (controls == null) { | ||
| 77 | controls = new Control[0]; | ||
| 78 | } | ||
| 79 | |||
| 80 | this.info = info; | ||
| 81 | this.mixer = mixer; | ||
| 82 | this.controls = controls; | ||
| 83 | } | ||
| 84 | |||
| 85 | |||
| 86 | // LINE METHODS | ||
| 87 | |||
| 88 | public Line.Info getLineInfo() { | ||
| 89 | return info; | ||
| 90 | } | ||
| 91 | |||
| 92 | |||
| 93 | public boolean isOpen() { | ||
| 94 | return open; | ||
| 95 | } | ||
| 96 | |||
| 97 | |||
| 98 | public void addLineListener(LineListener listener) { | ||
| 99 | |||
| 100 | synchronized(listeners) { | ||
| 101 | if ( ! (listeners.contains(listener)) ) { | ||
| 102 | listeners.addElement(listener); | ||
| 103 | } | ||
| 104 | } | ||
| 105 | } | ||
| 106 | |||
| 107 | |||
| 108 | /** | ||
| 109 | * Removes an audio listener. | ||
| 110 | * @param listener listener to remove | ||
| 111 | */ | ||
| 112 | public void removeLineListener(LineListener listener) { | ||
| 113 | listeners.removeElement(listener); | ||
| 114 | } | ||
| 115 | |||
| 116 | |||
| 117 | /** | ||
| 118 | * Obtains the set of controls supported by the | ||
| 119 | * line. If no controls are supported, returns an | ||
| 120 | * array of length 0. | ||
| 121 | * @return control set | ||
| 122 | */ | ||
| 123 | public Control[] getControls() { | ||
| 124 | |||
| 125 | Control[] returnedArray = new Control[controls.length]; | ||
| 126 | |||
| 127 | for (int i = 0; i < controls.length; i++) { | ||
| 128 | returnedArray[i] = controls[i]; | ||
| 129 | } | ||
| 130 | |||
| 131 | return returnedArray; | ||
| 132 | } | ||
| 133 | |||
| 134 | |||
| 135 | public boolean isControlSupported(Control.Type controlType) { | ||
| 136 | |||
| 137 | // protect against a NullPointerException | ||
| 138 | if (controlType == null) { | ||
| 139 | return false; | ||
| 140 | } | ||
| 141 | |||
| 142 | for (int i = 0; i < controls.length; i++) { | ||
| 143 | if (controlType == controls[i].getType()) { | ||
| 144 | return true; | ||
| 145 | } | ||
| 146 | } | ||
| 147 | |||
| 148 | return false; | ||
| 149 | } | ||
| 150 | |||
| 151 | |||
| 152 | public Control getControl(Control.Type controlType) { | ||
| 153 | |||
| 154 | // protect against a NullPointerException | ||
| 155 | if (controlType != null) { | ||
| 156 | |||
| 157 | for (int i = 0; i < controls.length; i++) { | ||
| 158 | if (controlType == controls[i].getType()) { | ||
| 159 | return controls[i]; | ||
| 160 | } | ||
| 161 | } | ||
| 162 | } | ||
| 163 | |||
| 164 | throw new IllegalArgumentException("Unsupported control type: " + controlType); | ||
| 165 | } | ||
| 166 | |||
| 167 | |||
| 168 | // HELPER METHODS | ||
| 169 | |||
| 170 | |||
| 171 | /** | ||
| 172 | * This method sets the open state and generates | ||
| 173 | * events if it changes. | ||
| 174 | */ | ||
| 175 | protected void setOpen(boolean open) { | ||
| 176 | |||
| 177 | if (Printer.trace) Printer.trace("> "+getClass().getName()+" (AbstractLine): setOpen(" + open + ") this.open: " + this.open); | ||
| 178 | |||
| 179 | boolean sendEvents = false; | ||
| 180 | long position = getLongFramePosition(); | ||
| 181 | |||
| 182 | synchronized (this) { | ||
| 183 | if (this.open != open) { | ||
| 184 | this.open = open; | ||
| 185 | sendEvents = true; | ||
| 186 | } | ||
| 187 | } | ||
| 188 | |||
| 189 | if (sendEvents) { | ||
| 190 | if (open) { | ||
| 191 | sendEvents(new LineEvent(this, LineEvent.Type.OPEN, position)); | ||
| 192 | } else { | ||
| 193 | sendEvents(new LineEvent(this, LineEvent.Type.CLOSE, position)); | ||
| 194 | } | ||
| 195 | } | ||
| 196 | if (Printer.trace) Printer.trace("< "+getClass().getName()+" (AbstractLine): setOpen(" + open + ") this.open: " + this.open); | ||
| 197 | } | ||
| 198 | |||
| 199 | |||
| 200 | /** | ||
| 201 | * Send line events. | ||
| 202 | */ | ||
| 203 | protected void sendEvents(LineEvent event) { | ||
| 204 | eventDispatcher.sendAudioEvents(event, listeners); | ||
| 205 | } | ||
| 206 | |||
| 207 | |||
| 208 | /** | ||
| 209 | * This is an error in the API: getFramePosition | ||
| 210 | * should return a long value. At CD quality, | ||
| 211 | * the int value wraps around after 13 hours. | ||
| 212 | */ | ||
| 213 | public final int getFramePosition() { | ||
| 214 | return (int) getLongFramePosition(); | ||
| 215 | } | ||
| 216 | |||
| 217 | |||
| 218 | /** | ||
| 219 | * Return the frame position in a long value | ||
| 220 | * This implementation returns AudioSystem.NOT_SPECIFIED. | ||
| 221 | */ | ||
| 222 | public long getLongFramePosition() { | ||
| 223 | return AudioSystem.NOT_SPECIFIED; | ||
| 224 | } | ||
| 225 | |||
| 226 | |||
| 227 | // $$kk: 06.03.99: returns the mixer used in construction. | ||
| 228 | // this is a hold-over from when there was a public method like | ||
| 229 | // this on line and should be fixed!! | ||
| 230 | protected AbstractMixer getMixer() { | ||
| 231 | return mixer; | ||
| 232 | } | ||
| 233 | |||
| 234 | protected EventDispatcher getEventDispatcher() { | ||
| 235 | return eventDispatcher; | ||
| 236 | } | ||
| 237 | |||
| 238 | // ABSTRACT METHODS | ||
| 239 | |||
| 240 | public abstract void open() throws LineUnavailableException; | ||
| 241 | public abstract void close(); | ||
| 242 | } | ||