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

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