/*
 * Copyright 2007 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package com.sun.media.sound;

import java.io.IOException;

import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.SourceDataLine;

/**
 * This is a processor object that writes into SourceDataLine
 * 
 * @version %I%, %E%
 * @author Karl Helgason
 */
public class SoftAudioPusher implements Runnable {

	private volatile boolean active = false;

	private SourceDataLine sourceDataLine = null;

	private Thread audiothread;

	private AudioInputStream ais;

	private byte[] buffer;

	public SoftAudioPusher(SourceDataLine sourceDataLine, AudioInputStream ais,
			int workbuffersizer) {
		this.ais = ais;
		this.buffer = new byte[workbuffersizer];
		this.sourceDataLine = sourceDataLine;
	}

	public synchronized void start() {
		if (active)
			return;
		active = true;
		audiothread = new Thread(this);
		audiothread.setPriority(Thread.MAX_PRIORITY);
		try {
			Thread.sleep(100);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		audiothread.start();
	}

	public synchronized void stop() {
		if (!active)
			return;
		active = false;
		try {
			audiothread.join();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}

	public void run() {
		byte[] buffer = SoftAudioPusher.this.buffer;
		AudioInputStream ais = SoftAudioPusher.this.ais;
		SourceDataLine sourceDataLine = SoftAudioPusher.this.sourceDataLine;

		try {
			while (active) {
				// Read from audio source
				ais.read(buffer);
				// Write byte buffer to source output
				sourceDataLine.write(buffer, 0, buffer.length);
			}
		} catch (IOException e) {
			active = false;
			e.printStackTrace();
		}

	}

}