Re: JMF?

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 15 Jul 2009 13:24:17 -0700

Message-ID:

<4a5e3af1$0$5408$b9f67a60@news.newsdemon.com>

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);
         }
     }
}

--

Knute Johnson
email s/nospam/knute2009/

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