audiotool.java

It is the Speech recognition software. It is platform independent. To execute the source code,

    /**
     * Creates the menu bar.
     */
    private static void createMenuBar(JFrame jframe) {
        JMenuBar menuBar = new JMenuBar();
        jframe.setJMenuBar(menuBar);

        JMenu menu = new JMenu("File");
        menuBar.add(menu);
        
        JMenuItem menuItem = new JMenuItem("Open...");
        menuItem.setAccelerator(KeyStroke.getKeyStroke("control O"));
        menuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    getFilename("Open...", JFileChooser.OPEN_DIALOG);
                    if ((filename == null) || (filename.length() == 0)) {
                        return;
                    }
                    try {
                        getAudioFromFile(filename);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
        menu.add(menuItem);
        
        saveMenuItem = new JMenuItem("Save");
        saveMenuItem.setAccelerator(KeyStroke.getKeyStroke("control S"));
	saveMenuItem.setEnabled(false);
        saveMenuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    if ((filename != null) && (filename.length() > 0)) {
                        try {
                            Utils.writeRawFile(audio, filename);
			    saveMenuItem.setEnabled(false);
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
            });
        menu.add(saveMenuItem);
        
        menuItem = new JMenuItem("Save As...");
        menuItem.setAccelerator(KeyStroke.getKeyStroke("control V"));
        menuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    getFilename("Save As...", JFileChooser.SAVE_DIALOG);
                    if ((filename == null) || (filename.length() == 0)) {
                        return;
                    }
                    try {
                        Utils.writeRawFile(audio, filename);
			saveMenuItem.setEnabled(false);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            });
        menu.add(menuItem);
        
        menuItem = new JMenuItem("Quit");
        menuItem.setAccelerator(KeyStroke.getKeyStroke("control Q"));
        menuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    System.exit(0);
                }
            });
        menu.add(menuItem);



        
        menu = new JMenu("Edit");
        menuBar.add(menu);
        
        menuItem = new JMenuItem("Select All");
        menuItem.setAccelerator(KeyStroke.getKeyStroke("control A"));
        menuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    audioPanel.selectAll();
                }
            });
        menu.add(menuItem);
        
        menuItem = new JMenuItem("Crop");
        menuItem.setAccelerator(KeyStroke.getKeyStroke("control X"));
        menuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    audioPanel.crop();
                }
            });
        menu.add(menuItem);
        



        menu = new JMenu("View");
        menuBar.add(menu);
        
        menuItem = new JMenuItem("Zoom In");
        menuItem.setAccelerator(KeyStroke.getKeyStroke('>'));
        menuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    zoomIn();
                }
            });
        menu.add(menuItem);
        
        menuItem = new JMenuItem("Zoom Out");
        menuItem.setAccelerator(KeyStroke.getKeyStroke('<'));
        menuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    zoomOut();
                }
            });
        menu.add(menuItem);

        menuItem = new JMenuItem("Original Size");
        menuItem.setAccelerator(KeyStroke.getKeyStroke('!'));
        menuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    zoomReset();
                }
            });
        menu.add(menuItem);





        menu = new JMenu("Audio");
        menuBar.add(menu);
        
        menuItem = new JMenuItem("Play");
        menuItem.setAccelerator(KeyStroke.getKeyStroke("control P"));
        menuItem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    player.play(audioPanel.getSelectionStart(),
                                audioPanel.getSelectionEnd());
                }
            });
        menu.add(menuItem);

        recordListener = new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    if (!recording) {
                        recording = true;
                        recorder.startRecording();
                        recordButton.setText("Stop");
			saveMenuItem.setEnabled(true);
                    } else {
                        recording = false;
                        recorder.stopRecording();
                        audio.setAudioData(getRecordedAudio(recorder));
                        recordButton.setText("Record");
                        player.play(audioPanel.getSelectionStart(),
                                    audioPanel.getSelectionEnd());
                    }
                }
            };

        
        menuItem = new JMenuItem("Record Start/Stop");
        menuItem.setAccelerator(KeyStroke.getKeyStroke("control R"));
        menuItem.addActionListener(recordListener);
        menu.add(menuItem);        
    }
    
    /**
     * Create the Panel where all the buttons are.
     *
     * @return a Panel with buttons on it.
     */
    private static JPanel createButtonPanel() {
        JPanel buttonPanel = new JPanel();
	FlowLayout layout = new FlowLayout();
	layout.setAlignment(FlowLayout.LEFT);
        buttonPanel.setLayout(layout);

        playButton = new JButton("Play");
        playButton.setEnabled(true);
        playButton.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
                    player.play(audioPanel.getSelectionStart(),
                                audioPanel.getSelectionEnd());
		}
	    });

        recordButton = new JButton("Record");
        recordButton.setEnabled(true);
        recordButton.addActionListener(recordListener);
        
        zoomInButton = new JButton("Zoom In");
        zoomInButton.setEnabled(true);
        zoomInButton.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
                    zoomIn();
		}
	    });

        zoomOutButton = new JButton("Zoom Out");
        zoomOutButton.setEnabled(true);
        zoomOutButton.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
                    zoomOut();
		}
	    });

        zoomResetButton = new JButton("Reset Size");
        zoomResetButton.setEnabled(true);
        zoomResetButton.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
                    zoomReset();
		}
	    });

        JButton exitButton = new JButton("Exit");
        exitButton.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
		    System.exit(0);
		}
	    });

        buttonPanel.add(recordButton);
        buttonPanel.add(playButton);
        buttonPanel.add(zoomInButton);
        buttonPanel.add(zoomOutButton);
        buttonPanel.add(zoomResetButton);
        buttonPanel.add(exitButton);

        return buttonPanel;
    }


    /**
     * Main method.
     *
     * @param args argv[0] : The name of an audio file
     *             argv[1] : SphinxProperties file
     */
    static public void main(String[] args) {
        FrontEnd frontEnd;
        StreamDataSource dataSource;
        
        prefs = Preferences.userRoot().node(PREFS_CONTEXT);
        filename = prefs.get(FILENAME_PREFERENCE, "untitled.raw");
        file = new File(filename);

        if ((args.length == 1) && (args[0].equals("-dumpMixers"))) {
            dumpMixers();
            System.exit(0);
        }
        
        try {
            URL url;
            if (args.length > 0) {
                filename = args[0];
            }
            if (args.length == 2) {
                url = new File(args[1]).toURI().toURL();
            } else {
                url = AudioTool.class.getResource("spectrogram.config.xml");
            }
            ConfigurationManager cm = new ConfigurationManager(url);

            recorder = (Microphone) cm.lookup(MICROPHONE);
            recorder.initialize();
            audio = new AudioData();
            
            frontEnd = (FrontEnd) cm.lookup(FRONT_END);
            dataSource = (StreamDataSource) cm.lookup(DATA_SOURCE);
            
            PropertySheet ps = cm.getPropertySheet(WINDOWER);
            float windowShiftInMs = ps.getFloat
                (RaisedCosineWindower.PROP_WINDOW_SHIFT_MS,
             RaisedCosineWindower.PROP_WINDOW_SHIFT_MS_DEFAULT);

	    final JFrame jframe = new JFrame("AudioTool");
            fileChooser = new JFileChooser();
            createMenuBar(jframe);
            
            /* Scale the width according to the size of the
             * spectrogram.
             */
            float windowShiftInSamples = windowShiftInMs
                * audio.getAudioFormat().getSampleRate() / 1000.0f;
            audioPanel = new AudioPanel(audio,
                                        1.0f / windowShiftInSamples,
                                        0.004f);
            spectrogramPanel = new SpectrogramPanel(frontEnd, dataSource, audio);

            JPanel panel = new JPanel();
            panel.setLayout(new BorderLayout());
	    panel.add(createButtonPanel(), BorderLayout.NORTH);
            panel.add(audioPanel, BorderLayout.CENTER);
	    panel.add(spectrogramPanel, BorderLayout.SOUTH);
            
	    JScrollPane scroller = new JScrollPane(panel);

            player = new AudioPlayer(audio);
            player.start();
            
            getAudioFromFile(filename);
            
            jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	    jframe.setContentPane(scroller);
            jframe.pack();
            jframe.setSize(640,540);
            jframe.setVisible(true);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }       
}