directsoundauto.java

jmf的示例程序,学习jmf入门示例,很好很强大,什么功能都有

/*
 * @(#)DirectSoundAuto.java	1.3 01/03/13
 *
 * Copyright (c) 1999-2001 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */

import javax.media.*;
import javax.media.protocol.*;
import javax.media.format.AudioFormat;
import java.util.Vector;
import java.util.Enumeration;
import com.sun.media.protocol.dsound.DirectSoundStream;

public class DirectSoundAuto {
    private static final String detectClass = "com.sun.media.protocol.dsound.DSound";
    CaptureDeviceInfo [] devices = null;

    public static void main(String[] args) {
       new DirectSoundAuto();
       System.exit(0);
    }

    private boolean supports(AudioFormat af) {
	try {
	    com.sun.media.protocol.dsound.DSound ds;
	    ds = new com.sun.media.protocol.dsound.DSound(af, 1024);
	    ds.open();
	    ds.close();
	} catch (Exception e) {
	    System.err.println(e);
	    return false;
	}
	return true;
    }
    
    public DirectSoundAuto() {
	boolean supported = false;
	// instance JavaSoundDetector to check is javasound's capture is availabe
	try {
	    Class cls = Class.forName(detectClass);
	    supported = true;
	} catch (Throwable t) {
	    supported = false;
	    // t.printStackTrace();
	}
	
	System.out.println("DirectSound Capture Supported = " + supported);

	if (supported) {
	    // It's there, start to register JavaSound with CaptureDeviceManager
	    Vector devices = (Vector) CaptureDeviceManager.getDeviceList(null).clone();
	    
	    // remove the old direct sound capturers
	    String name;
	    Enumeration enum = devices.elements();
	    while (enum.hasMoreElements()) {
		CaptureDeviceInfo cdi = (CaptureDeviceInfo) enum.nextElement();	
		name = cdi.getName();
		if (name.startsWith(com.sun.media.protocol.dsound.DataSource.NAME))
		    CaptureDeviceManager.removeDevice(cdi);
	    }
	    int LE = AudioFormat.LITTLE_ENDIAN;
	    int SI = AudioFormat.SIGNED;
	    int US = AudioFormat.UNSIGNED;
	    int UN = AudioFormat.NOT_SPECIFIED;
	    float [] Rates = new float[] {
		48000, 44100, 32000, 22050, 16000, 11025, 8000
	    };
	    Vector formats = new Vector(4);
	    for (int rateIndex = 0; rateIndex < Rates.length; rateIndex++) {
		float rate = Rates[rateIndex];
		AudioFormat af;
		af = new AudioFormat(AudioFormat.LINEAR, rate, 16, 2, LE, SI);
		if (supports(af)) formats.addElement(af);
		af = new AudioFormat(AudioFormat.LINEAR, rate, 16, 1, LE, SI);
		if (supports(af)) formats.addElement(af);
		af = new AudioFormat(AudioFormat.LINEAR, rate, 8, 2, UN, US);
		if (supports(af)) formats.addElement(af);
		af = new AudioFormat(AudioFormat.LINEAR, rate, 8, 1, UN, US);
		if (supports(af)) formats.addElement(af);
	    }

	    AudioFormat [] formatArray = new AudioFormat[formats.size()];
	    for (int fa = 0; fa < formatArray.length; fa++)
		formatArray[fa] = (AudioFormat) formats.elementAt(fa);

	    CaptureDeviceInfo cdi = new CaptureDeviceInfo(
		com.sun.media.protocol.dsound.DataSource.NAME,
		new MediaLocator("dsound://"),
		formatArray);
	    CaptureDeviceManager.addDevice(cdi);
	    try {
		CaptureDeviceManager.commit();
		System.out.println("DirectSoundAuto: Committed ok");
	    } catch (java.io.IOException ioe) {
		System.err.println("DirectSoundAuto: error committing cdm");
	    }
	}
    }
}