SoundSampler.java

/*
 * Copyright (C) 2010-2011, Gostai S.A.S.
 *
 * This software is provided "as is" without warranty of any kind,
 * either expressed or implied, including but not limited to the
 * implied warranties of fitness for a particular purpose.
 *
 * See the LICENSE file for more information.
 */

package urbi;

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

/**
 * The SoundSampler class helps to capture, play and record audio data.
 * <p>
 * <p>
 * @author Bastien Saltel
 */

public class    SoundSampler extends JFrame
{
        /** A status value indiucating if the sampler is in capture mode. */
        protected boolean       running;

        private SoundAction             action = null;

        public          SoundSampler()
        {
                super("Sound Sampler");
                setDefaultCloseOperation(EXIT_ON_CLOSE);
                createUI();
                setVisible(true);
                pack();
                setVisible(true);
        }

        public void             setAction(SoundAction action)
        {
                this.action = action;
        }

        /**
         * Creates the user interface to process the operations.
         * <p>
         */
        private void    createUI()
        {
                setFont(new Font("Serif", Font.PLAIN, 12));
                setSize(200, 350);
                Container content = getContentPane();

                final JButton capture = new JButton("Capture");
                final JButton stop = new JButton("Stop");
                final JButton play = new JButton("Play");

                final JButton save = new JButton("Save");

                capture.setEnabled(true);
                stop.setEnabled(false);
                play.setEnabled(false);
                save.setEnabled(false);
                ActionListener captureListener = new ActionListener()
                        {
                                public void actionPerformed(ActionEvent e)
                                {
                                        capture.setEnabled(false);
                                        stop.setEnabled(true);
                                        play.setEnabled(false);
                                        save.setEnabled(false);
                                        captureAudio();
                                }
                        };
                capture.addActionListener(captureListener);
                content.add(capture, BorderLayout.NORTH);

                ActionListener stopListener = new ActionListener()
                        {
                                public void actionPerformed(ActionEvent e)
                                {
                                        capture.setEnabled(true);
                                        stop.setEnabled(false);
                                        play.setEnabled(true);
                                        save.setEnabled(true);
                                        running = false;
                                        action.stopAudio();
                                }
                        };
                stop.addActionListener(stopListener);
                content.add(stop, BorderLayout.WEST);

                ActionListener playListener = new ActionListener()
                        {
                                public void actionPerformed(ActionEvent e)
                                {
                                        playAudio();
                                }
                        };
                play.addActionListener(playListener);
                content.add(play, BorderLayout.EAST);

                ActionListener saveListener = new ActionListener()
                        {
                                public void actionPerformed(ActionEvent e)
                                {
                                        FileDialog              fd = new FileDialog(SoundSampler.this);
                                        fd.setVisible(true);
                                        if (fd.getFile() == null)
                                                return ;
                                        String path = fd.getDirectory() + fd.getFile();
                                        saveAudio(path);
                                }
                        };
                save.addActionListener(saveListener);
                Panel   bottom = new Panel(new GridLayout(2, 1));
                Panel   topBottom = new Panel();
                topBottom.add(save);
                bottom.add(topBottom);
                content.add(bottom, BorderLayout.SOUTH);

                addWindowListener(new WindowAdapter()
                        {
                                public void windowClosing(WindowEvent e)
                                {
                                        dispose();
                                        System.exit(0);
                                }
                        });
        }

        private void captureAudio()
        {
                Runnable runner = new Runnable()
                        {
                                public void run()
                                {
                                        running = true;
                                        action.captureAudio();
                                        while (running)
                                                {}
                                }
                        };
                Thread captureThread = new Thread(runner);
                captureThread.start();
        }

        private void playAudio()
        {
                Runnable runner = new Runnable()
                        {
                                public void run()
                                {
                                        action.playAudio();
                                }
                        };
                Thread playThread = new Thread(runner);
                playThread.start();
        }

        private void saveAudio(final String path)
        {
                Runnable runner = new Runnable()
                        {
                                public void run()
                                {
                                        action.saveAudio(path);
                                }
                        };
                Thread saveThread = new Thread(runner);
                saveThread.start();
        }
}