diagnosticvideorenderer.java

FMJ（freedom media for java)是java视频开发的新选择

/*
 * Created on 12/10/2004
 */
package net.sf.fmj.media.renderer.video;

import java.util.logging.Logger;

import javax.media.Buffer;
import javax.media.Control;
import javax.media.Format;
import javax.media.Renderer;
import javax.media.ResourceUnavailableException;
import javax.media.format.RGBFormat;
import javax.media.format.YUVFormat;

import net.sf.fmj.utility.LoggerSingleton;


/**
 * This Renderer is used to log process() calls.  Useful for diagnosing
 * whether the Renderer is actually being told to process buffers. 
 * 
 * @author Warren Bloomer
 *
 */
public class DiagnosticVideoRenderer implements Renderer {
	
	private static final Logger logger = LoggerSingleton.logger;

	String name = "Disgnostic Video Renderer";
	
	boolean started = false;
	
	Format[] supportedFormats = new Format[] {
			new RGBFormat(),
			new YUVFormat(),
	};
	
	int noFrames = 0;
	
    /*************************************************************************
     * Renderer implementation
     *************************************************************************/

    public void start() {
        started = true;
    }

    public void stop() {
        started = false;
    }
    
    /**
     * Lists the possible input formats supported by this plug-in.
     */
    public Format [] getSupportedInputFormats() {
        return supportedFormats;
    }

    /**
     * Set the data input format.
     */
    public Format setInputFormat(Format format) {
        return format;
    }

    /**
     * Processes the data and renders it to a component
     */
    public int process(Buffer buffer) {
	
    	if ( (noFrames % 10) == 0) {
    		logger.fine("Received frame " + noFrames);
    	}
    	noFrames++;
    	
		return BUFFER_PROCESSED_OK;
    }

    /*--------------- PlugIn implementation ---------------- */

    public String getName() {
        return name;
    }
    
    /**
     * Opens the plugin
     */
    public void open() throws ResourceUnavailableException {


    }

    /**
     * Resets the state of the plug-in. Typically at end of media or when media
     * is repositioned.
     */
    public void reset() {
        // Nothing to do
    }

    public synchronized void close() {
        // Nothing to do
    }

    /*--------------- Controls implementation ------------- */
    
    /**
     * Returns an array of supported controls
     **/
    public Object[] getControls() {
        // No controls
        return (Object[]) new Control[0];
    }

    /**
     * Return the control based on a control type for the PlugIn.
     */
    public Object getControl(String controlType) {
       try {
          Class  cls = Class.forName(controlType);
          Object cs[] = getControls();
          for (int i = 0; i < cs.length; i++) {
             if (cls.isInstance(cs[i])) {
                return cs[i];
             }
          }
          return null;
       } catch (Exception e) {   // no such controlType or such control
         return null;
       }
    }

}