Re: JMF?

From:
Dirk Bruere at NeoPax <dirk.bruere@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Wed, 15 Jul 2009 22:03:18 +0100
Message-ID:
<7c6ug7F25dfsqU2@mid.individual.net>
Knute Johnson wrote:

Dirk Bruere at NeoPax wrote:

Dirk Bruere at NeoPax wrote:

I need a bit of s/w for playing various basic audio formats eg .wav
.mp3 (no GUI).

I assume I'll need JMF.
Are there any decent tutorials about?


Having said that, what I want is an audio player class without GUI
that will play common audio formats and have basic methods for stuff
like vol, start, stop etc

Is there one available? - I'm looking and have not found anything
suitable yet. I would have thought it should be easy, but it doesn't
seem to be.


Here is a simple outline class. Implementation of a level control is a
little more complicated. This will play .au, .aiff and some .wav,
depending on the actual data format.

import java.io.*;
import javax.sound.sampled.*;

public class Play {
    public static void main(String[] args) {
        class MyLineListener implements LineListener {
            public void update(LineEvent le) {
                LineEvent.Type type = le.getType();
                System.out.println(type);
            }
        };

        try {
            AudioInputStream fis =
             AudioSystem.getAudioInputStream(new File(args[0]));
            System.out.println("File AudioFormat: " + fis.getFormat());
            AudioInputStream ais = AudioSystem.getAudioInputStream(
             AudioFormat.Encoding.PCM_SIGNED,fis);
            AudioFormat af = ais.getFormat();
            System.out.println("AudioFormat: " + af.toString());

            int frameRate = (int)af.getFrameRate();
            System.out.println("Frame Rate: " + frameRate);
            int frameSize = af.getFrameSize();
            System.out.println("Frame Size: " + frameSize);

            SourceDataLine line = AudioSystem.getSourceDataLine(af);
            line.addLineListener(new MyLineListener());

            line.open(af);
            int bufSize = line.getBufferSize();
            System.out.println("Buffer Size: " + bufSize);

            line.start();

            byte[] data = new byte[bufSize];
            int bytesRead;

            while ((bytesRead = ais.read(data,0,data.length)) != -1)
                line.write(data,0,bytesRead);

            line.drain();
            line.stop();
            line.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}


Thanks.
Any way of extending it to mp3, flac?

--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.theconsensus.org/ - A UK political party
http://www.onetribe.me.uk/wordpress/?cat=5 - Our podcasts on weird stuff

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