v4lauto.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

/*
 * @(#)V4LAuto.java	1.2 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.Format;
import javax.media.format.VideoFormat;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import com.sun.media.protocol.v4l.*;

public class V4LAuto {

    public V4LAuto() {
        Vector devices = (Vector) CaptureDeviceManager.getDeviceList(null).clone();
	Enumeration enum = devices.elements();
	while (enum.hasMoreElements()) {
	    CaptureDeviceInfo cdi = (CaptureDeviceInfo) enum.nextElement();
	    String name = cdi.getName();
	    if (name.startsWith("v4l:"))
		CaptureDeviceManager.removeDevice(cdi);
	}
	
	for (int i = 0; i < 10; i++) {	    
	    autoDetect(i);
	}
    }
    
    protected CaptureDeviceInfo autoDetect(int cardNo) {
	CaptureDeviceInfo cdi = null;
	try {
	    cdi = new V4LDeviceQuery(cardNo);
	    if ( cdi != null && cdi.getFormats() != null &&
		 cdi.getFormats().length > 0) {
		// Commit it to disk. Its a new device
		if (CaptureDeviceManager.addDevice(cdi)) {
		    System.err.println("Added device " + cdi);
		    CaptureDeviceManager.commit();
		}
	    }
	} catch (Throwable t) {
	    System.err.println(t);
	    if (t instanceof ThreadDeath)
		throw (ThreadDeath)t;
	}
	
	return cdi;
    }

    public static void main(String [] args) {
	V4LAuto a = new V4LAuto();
	System.exit(0);
    }
}