sound.java

用jxse开发的一个p2p通讯软件 有聊天 文件共享 视频3大功能

/*
*  Copyright (c) 2001 Sun Microsystems, Inc.  All rights
*  reserved.
*
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions
*  are met:
*
*  1. Redistributions of source code must retain the above copyright
*  notice, this list of conditions and the following disclaimer.
*
*  2. Redistributions in binary form must reproduce the above copyright
*  notice, this list of conditions and the following disclaimer in
*  the documentation and/or other materials provided with the
*  distribution.
*
*  3. The end-user documentation included with the redistribution,
*  if any, must include the following acknowledgment:
*  "This product includes software developed by the
*  Sun Microsystems, Inc. for Project JXTA."
*  Alternately, this acknowledgment may appear in the software itself,
*  if and wherever such third-party acknowledgments normally appear.
*
*  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
*  must not be used to endorse or promote products derived from this
*  software without prior written permission. For written
*  permission, please contact Project JXTA at http://www.jxta.org.
*
*  5. Products derived from this software may not be called "JXTA",
*  nor may "JXTA" appear in their name, without prior written
*  permission of Sun.
*
*  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
*  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
*  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
*  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
*  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
*  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
*  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
*  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
*  SUCH DAMAGE.
*  ====================================================================
*
*  This software consists of voluntary contributions made by many
*  individuals on behalf of Project JXTA.  For more
*  information on Project JXTA, please see
*  <http://www.jxta.org/>.
*
*  This license is based on the BSD license adopted by the Apache Foundation.
*
*  $Id: Sound.java,v 1.3 2006/07/06 05:23:57 nano Exp $
*/

package net.jxta.myjxta.util;

import java.io.IOException;
import java.net.URL;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;

/**
 *
 * @version $Id: Sound.java,v 1.3 2006/07/06 05:23:57 nano Exp $
 *
 * @author james todd [gonzo at jxta dot org]
 */

public class Sound {

    public Sound() {}

    public void play(URL u) {
        AudioInputStream ais = null;

        try {
            ais = AudioSystem.getAudioInputStream(u);
        } catch (UnsupportedAudioFileException uafe) {uafe.printStackTrace();}
        catch (IOException ioe) {}

        if (ais != null) {
            AudioFormat bf = ais.getFormat();
            AudioFormat df = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
                                             bf.getSampleRate(), 16,
                                             bf.getChannels(),
                                             bf.getChannels() * 2,
                                             bf.getSampleRate(), false);
            AudioInputStream dis = AudioSystem.getAudioInputStream(df, ais);

            if (dis != null) {
                try {
                    raw(df, dis);
                } catch (IOException ioe) {
                } catch (LineUnavailableException lue) {
                }
            }

            try {
                ais.close();
            } catch (IOException ioe) {
            }
        }
    }

    private void raw(AudioFormat af, AudioInputStream ais)
    throws IOException, LineUnavailableException {
        byte[] buf = new byte[4096];
        SourceDataLine line = getLine(af);

        if (line != null) {
            line.start();

            int r = 0;
            while (r != -1) {
                r = ais.read(buf, 0, buf.length);

                if (r != -1) {
                    line.write(buf, 0, r);
                }
            }

            line.drain();
            line.stop();
            line.close();

            ais.close();
        }
    }

    private SourceDataLine getLine(AudioFormat af)
    throws LineUnavailableException {
        SourceDataLine l = null;
        DataLine.Info i = new DataLine.Info(SourceDataLine.class, af);

        l = (SourceDataLine)AudioSystem.getLine(i);

        l.open(af);

        return l;
    }
}