jcamera.java

本程序所需的jmf到sun官方网站下载,先要进行设备注册才能运行,详情请见readme.txt

import java.awt.Component;
import java.awt.Image;

import javax.media.Buffer;
import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.Player;
import javax.media.control.FrameGrabbingControl;
import javax.media.format.VideoFormat;
import javax.media.util.BufferToImage;

/*
 * 创建日期 2006-11-19
 *
 * TODO 要更改此生成的文件的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */

public class JCamera {

	private static Player player = null;
	private static Buffer buf = null;
	private static Image img = null;
	private static BufferToImage btoi = null;
    private static Component comp;
	
	public static Component init(){
		CaptureDeviceInfo di = null;
		MediaLocator ml = null;
		String str1 = "vfw:Logitech USB Video Camera:0";
		String str2 = "vfw:Microsoft WDM Image Capture (Win32):0";
		di = CaptureDeviceManager.getDevice(str2);
		ml = di.getLocator();

		try
		{
			player = Manager.createRealizedPlayer(ml);
			player.start();

			if ((comp = player.getVisualComponent()) != null)
			{
				return comp;
			}
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
		return null;

	}
	public static Image getImg(){
//		从视频得到图像 
		FrameGrabbingControl fgc =
			(FrameGrabbingControl) player.getControl(
			"javax.media.control.FrameGrabbingControl");
		buf = fgc.grabFrame();     
		btoi = new BufferToImage((VideoFormat) buf.getFormat());
		img = btoi.createImage(buf); 
		return img;
	}
	public static Component getComp(){
		return comp;
	}
	public static  void detectCaptureDevices() {
		// check if JavaSound capture is available
//		message("Looking for Audio capturer");
		Class dsauto = null;
		try { 
			dsauto = Class.forName("DirectSoundAuto");
			dsauto.newInstance();
//			message("Finished detecting DirectSound capturer");
		} catch (ThreadDeath td) {
			throw td;
		} catch (Throwable t ) {
		}

		Class jsauto = null;
		try { 
			jsauto = Class.forName("JavaSoundAuto");
			jsauto.newInstance();
//			message("Finished detecting javasound capturer");
		} catch (ThreadDeath td) {
			throw td;
		} catch (Throwable t ) {
//			message("JavaSound capturer detection failed!");
		}

		// Check if VFWAuto or SunVideoAuto is available
//		message("Looking for video capture devices");
		Class auto = null;
		Class autoPlus = null;
		try {
			auto = Class.forName("VFWAuto");
		} catch (Exception e) {
		}
		if (auto == null) {
			try {
				auto = Class.forName("SunVideoAuto");
			} catch (Exception ee) {
			}
			try {
				autoPlus = Class.forName("SunVideoPlusAuto");
			} catch (Exception ee) {
			}
		}
		try {
			Object instance = auto.newInstance();
			if (autoPlus != null) {
				Object instancePlus = autoPlus.newInstance();
			}
//			message("Finished detecting video capture devices");
		} catch (ThreadDeath td) {
			throw td;
		} catch (Throwable t) {
//			message("Capture device detection failed!");
		}
	}
}