// $Id: ContinuousSound.java,v 1.6 2007/01/13 03:23:04 vickery Exp $ /* * Created on Jan 08, 2007 * * Author: C. Vickery * * Copyright (c) 2007, Queens College of the City University * of New York. All rights reserved. * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the * following conditions are met: * * * Redistributions of source code must retain the above * copyright notice, this list of conditions and the * following disclaimer. * * * Redistributions in binary form must reproduce the * above copyright notice, this list of conditions and * the following disclaimer in the documentation and/or * other materials provided with the distribution. * * * Neither the name of Queens College of CUNY * nor the names of its contributors may be used to * endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * $Log: ContinuousSound.java,v $ * Revision 1.6 2007/01/13 03:23:04 vickery * Added tooltips and cleaned up UI details. Reworked audio output * to get rid of a buzz caused by audio system dropping out for 1.5 * msec periodically one one Windows computer. The buzz remains. * * Revision 1.5 2007/01/09 09:15:14 vickery * Re-cleaning up UI. * * Revision 1.4 2007/01/09 02:52:56 vickery * Continuous Sound comments reflect PC experiment. * * Revision 1.2 2007/01/03 07:17:55 vickery * Debugging audio output. * * Revision 1.1 2007/01/01 02:28:12 vickery * AudioExperiments is my investigation into Java Sampled Audio, done * in preparation for including audio feedback in the AudioSampling class. * */ import java.awt.BorderLayout; import java.awt.Container; import java.awt.Dimension; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.sound.sampled.AudioFormat; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.Line; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.Mixer; import javax.sound.sampled.SourceDataLine; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; // class ContinuousSound // ------------------------------------------------------------------- /** * Lets you turn a tone on and off. * * Writing one sample at a time to the output line: * * MacBook with 2 GHz Core Duo processor: * Clean tone. Moving mouse, running other apps, etc. has no effect * on sound quality. * Buffer size did not change (88200 bytes). * CPU utilization by this app when not playing: 3.8% * CPU utilization by this app when playing: 6.5% * * IBM Intellistation running XPSP2: * Buzzy-poppy sound. Moving the mouse degraded the sound. * Buffer size did not change (88200 bytes). * CPU utilization when not playing: 0% * CPU utilization when playing: 50% * * Writing two samples at a time cleans up tone purity problem on the PC. * To be safe, I'll do eight samples at a time in the application. * * @author C. Vickery * */ public class ContinuousSound extends JFrame { public static final long serialVersionUID = 1L; // UI final JPanel contentPanel = new JPanel(new BorderLayout()); final JButton playStopButton = new JButton("Play"); final JButton exitButton = new JButton("Exit"); // Audio SourceDataLine audioOut = null; static int afBitsPerSample = 0; static float afSamplingRate = 0; static boolean playSound = false; // Constructor // ----------------------------------------------------------------- public ContinuousSound(String title) { super(title); // UI contentPanel.add(playStopButton, BorderLayout.NORTH); contentPanel.add(exitButton, BorderLayout.SOUTH); setContentPane(contentPanel); pack(); centerIt(this); setVisible(true); playStopButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { playSound =! playSound; if (playSound) { playStopButton.setText("Stop"); } else { System.out.println(audioOut.getBufferSize()); playStopButton.setText("Play"); } } }); setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); exitButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { System.exit(0); } }); // Get the first SourceDataLine available, if any. Mixer.Info[] mixerInfos = AudioSystem.getMixerInfo(); for (Mixer.Info mixerInfo: mixerInfos) { Mixer mixer = AudioSystem.getMixer(mixerInfo); Line.Info[] lineInfos = mixer.getSourceLineInfo(); for (Line.Info lineInfo: lineInfos) { try { audioOut = (SourceDataLine)mixer.getLine(lineInfo); break; } catch (LineUnavailableException lue) {} catch (ClassCastException cce) {} } if (audioOut != null) { try { audioOut.open(); break; // Viable line found -- search no more! } catch (LineUnavailableException lue) { audioOut = null; continue; // Try another line or mixer } } } if (audioOut == null) { playStopButton.setEnabled(false); playStopButton.setText("Unable Play Sounds"); return; } // Capture default line attributes. final AudioFormat af = audioOut.getFormat(); afBitsPerSample = af.getSampleSizeInBits(); afSamplingRate = af.getSampleRate(); // Launch Playback Thread startPlayback(); } // startPlayback() // ----------------------------------------------------------------- /** * */ public void startPlayback() { final byte[] sample = new byte[8]; new Thread() { final double inc = (Math.PI * 2) / 100; // 441 Hz double now = 0; short sineValue = 0; public void run() { audioOut.start(); while (true) { for (int i=0; i<8; i++) { sineValue = (short)(Math.sin(now) * 32767); sample[0] = sample[2] = (byte)sineValue; sample[1] = sample[3] = (byte)(sineValue >> 8); now += inc; sineValue = (short)(Math.sin(now) * 32767); sample[4] = sample[6] = (byte)sineValue; sample[5] = sample[7] = (byte)(sineValue >> 8); now += inc; if (playSound) { for (int j=0; j<1; j++) { audioOut.write(sample, 0, sample.length); } } else { audioOut.flush(); try { Thread.sleep(100); } catch (InterruptedException ie) {} } } } } }.start(); return; } // centerIt() // ----------------------------------------------------------------- /** * Centers a component on the screen. * */ private void centerIt(Container it) { Dimension window = Toolkit.getDefaultToolkit().getScreenSize(); Dimension component = it.getSize(); it.setLocation(window.width/2 - component.width/2, window.height/2 - component.height/2); } // main() // ------------------------------------------------------------------ /** * * @param args Not Used. */ public static void main(String[] args) { new ContinuousSound("Continuous Sound"); } }