1 /*
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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
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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.
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24  */
25 
26 package com.sun.media.sound;
27 
28 import java.io.IOException;
29 
30 import javax.sound.sampled.AudioInputStream;
31 import javax.sound.sampled.SourceDataLine;
32 
33 /**
34  * This is a processor object that writes into SourceDataLine
35  *
36  * @author Karl Helgason
37  */
38 public final class SoftAudioPusher implements Runnable {
39 
40     private volatile boolean active = false;
41     private SourceDataLine sourceDataLine = null;
42     private Thread audiothread;
43     private final AudioInputStream ais;
44     private final byte[] buffer;
45 
SoftAudioPusher(SourceDataLine sourceDataLine, AudioInputStream ais, int workbuffersizer)46     public SoftAudioPusher(SourceDataLine sourceDataLine, AudioInputStream ais,
47             int workbuffersizer) {
48         this.ais = ais;
49         this.buffer = new byte[workbuffersizer];
50         this.sourceDataLine = sourceDataLine;
51     }
52 
start()53     public synchronized void start() {
54         if (active)
55             return;
56         active = true;
57         audiothread = new Thread(null, this, "AudioPusher", 0, false);
58         audiothread.setDaemon(true);
59         audiothread.setPriority(Thread.MAX_PRIORITY);
60         audiothread.start();
61     }
62 
stop()63     public synchronized void stop() {
64         if (!active)
65             return;
66         active = false;
67         try {
68             audiothread.join();
69         } catch (InterruptedException e) {
70             //e.printStackTrace();
71         }
72     }
73 
74     @Override
run()75     public void run() {
76         byte[] buffer = SoftAudioPusher.this.buffer;
77         AudioInputStream ais = SoftAudioPusher.this.ais;
78         SourceDataLine sourceDataLine = SoftAudioPusher.this.sourceDataLine;
79 
80         try {
81             while (active) {
82                 // Read from audio source
83                 int count = ais.read(buffer);
84                 if(count < 0) break;
85                 // Write byte buffer to source output
86                 sourceDataLine.write(buffer, 0, count);
87             }
88         } catch (IOException e) {
89             active = false;
90             //e.printStackTrace();
91         }
92     }
93 }
94