/*

 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.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

 *

 * @author Karl Helgason

 */

public final class SoftAudioPusher implements Runnable {

    private volatile boolean active = false;

    private SourceDataLine sourceDataLine = null;

    private Thread audiothread;

    private final AudioInputStream ais;

    private final 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(null, this, "AudioPusher", 0, false);

        audiothread.setDaemon(true);

        audiothread.setPriority(Thread.MAX_PRIORITY);

        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

                int count = ais.read(buffer);

                if(count < 0) break;

                // Write byte buffer to source output

                sourceDataLine.write(buffer, 0, count);

            }

        } catch (IOException e) {

            active = false;

            //e.printStackTrace();

        }

    }

}