import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.sound.sampled.*;

public class AudioPlayer02 extends JFrame{

  AudioFormat audioFormat;
  AudioInputStream audioInputStream;
  SourceDataLine sourceDataLine;
  boolean stopPlayback = false;
  final JButton stopBtn = new JButton("Stop");
  final JButton playBtn = new JButton("Play");
  final JTextField textField =
                       new JTextField("junk.au");

  public static void main(String args[]){
    new AudioPlayer02();
  }//end main
  //-------------------------------------------//

  public AudioPlayer02(){//constructor

    stopBtn.setEnabled(false);
    playBtn.setEnabled(true);

    //Instantiate and register action listeners
    // on the Play and Stop buttons.
    playBtn.addActionListener(
      new ActionListener(){
        public void actionPerformed(
                                  ActionEvent e){
          stopBtn.setEnabled(true);
          playBtn.setEnabled(false);
          playAudio();//Play the file
        }//end actionPerformed
      }//end ActionListener
    );//end addActionListener()

    stopBtn.addActionListener(
      new ActionListener(){
        public void actionPerformed(
                                  ActionEvent e){
          //Terminate playback before EOF
          stopPlayback = true;
        }//end actionPerformed
      }//end ActionListener
    );//end addActionListener()

    getContentPane().add(playBtn,"West");
    getContentPane().add(stopBtn,"East");
    getContentPane().add(textField,"North");

    setTitle("Copyright 2003, R.G.Baldwin");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setSize(250,70);
    setVisible(true);
  }//end constructor
  //-------------------------------------------//

  //This method plays back audio data from an
  // audio file whose name is specified in the
  // text field.
  private void playAudio() {
    try{
      File soundFile =
                   new File(textField.getText());
      audioInputStream = AudioSystem.
                  getAudioInputStream(soundFile);
      audioFormat = audioInputStream.getFormat();
      System.out.println(audioFormat);

      DataLine.Info dataLineInfo =
                          new DataLine.Info(
                            SourceDataLine.class,
                                    audioFormat);

      sourceDataLine =
             (SourceDataLine)AudioSystem.getLine(
                                   dataLineInfo);

      //Create a thread to play back the data and
      // start it running.  It will run until the
      // end of file, or the Stop button is
      // clicked, whichever occurs first.
      // Because of the data buffers involved,
      // there will normally be a delay between
      // the click on the Stop button and the
      // actual termination of playback.
      new PlayThread().start();
    }catch (Exception e) {
      e.printStackTrace();
      System.exit(0);
    }//end catch
  }//end playAudio


//=============================================//
//Inner class to play back the data from the
// audio file.
class PlayThread extends Thread{
  byte tempBuffer[] = new byte[10000];

  public void run(){
    try{
      sourceDataLine.open(audioFormat);
      sourceDataLine.start();

      int cnt;
      //Keep looping until the input read method
      // returns -1 for empty stream or the
      // user clicks the Stop button causing
      // stopPlayback to switch from false to
      // true.
      while((cnt = audioInputStream.read(
           tempBuffer,0,tempBuffer.length)) != -1
                       && stopPlayback == false){
        if(cnt > 0){
          //Write data to the internal buffer of
          // the data line where it will be
          // delivered to the speaker.
          sourceDataLine.write(
                             tempBuffer, 0, cnt);
        }//end if
      }//end while
      //Block and wait for internal buffer of the
      // data line to empty.
      sourceDataLine.drain();
      sourceDataLine.close();

      //Prepare to playback another file
      stopBtn.setEnabled(false);
      playBtn.setEnabled(true);
      stopPlayback = false;
    }catch (Exception e) {
      e.printStackTrace();
      System.exit(0);
    }//end catch
  }//end run
}//end inner class PlayThread
//===================================//

}//end outer class AudioPlayer02.java