WEBCAM HTTP SERVEUR LIVE SANS JMF

/**
 * HTTP Webcam Server Version 1.0
 * (c) 2008 Pierrick HYMBERT <pierrick.hymbert@gmail.com>	
 * This library is "PROVIDED AS IS" without guaranty of any kinds.
 * Freely distribuable under the terms of an MIT-style license.
 * Visit www.hypik.fr
 */
package org.hypik.webcamlib.test.server;

import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.DirectColorModel;
import java.awt.image.WritableRaster;
import java.io.ByteArrayOutputStream;

import org.apache.log4j.Logger;
import org.hypik.webcamlib.codecs.Codec;
import org.hypik.webcamlib.codecs.Codecs;
import org.hypik.webcamlib.compressor.CompressionException;
import org.hypik.webcamlib.compressor.DecompressVideo;
import org.hypik.webcamlib.compressor.jna.ICM;
import org.hypik.webcamlib.device.Device;
import org.hypik.webcamlib.device.listener.DeviceErrorListener;
import org.hypik.webcamlib.device.listener.DeviceFrameListener;
import org.hypik.webcamlib.device.listener.DeviceStatusListener;
import org.hypik.webcamlib.jna.User32.BitmapInfoHeader;
import org.hypik.webcamlib.jna.User32.VideoHDR;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.jna.Memory;
/**
 * This class manage the webcam capture in a thread.
 * After configure decompression video driver and webcam device.
 * Instance can grab frame every rate seconds and decompress it.
 * Frame data can be get back as RGB or Jpeg formats.
 * @author Pierrick Hymbert <a href="mailto:pierrick.hymbert@gmail.com">Contact</a>
 *
 */
public class WebcamCapture extends Thread {
	/**
	 * The class logger.
	 */
	private Logger logger = Logger.getLogger(WebcamCapture.class);
	/**
	 * The webcam device.
	 */
	private Device device;
	/**
	 * Time between each frame.
	 */
	private int rate;
	/**
	 * Indicates if we must continue capturing frame.
	 */
	private boolean capture = false;
	/**
	 * Indicate that all is configured.
	 */
	private boolean available = false;
	/**
	 * The video driver decompression.
	 */
	private DecompressVideo decompressVideo;
	/**
	 * The decompressed data.
	 */
	private Memory decompressedData;
	/**
	 * The output frame format.
	 */
	private BitmapInfoHeader bitmapInfoOutput;
	/**
	 * Build a webcam capture.
	 * @param device The webcam
	 * @param rate The refresh rate.
	 */
	public WebcamCapture(Device device, int rate){
		super("WCCapture #" + device.getIndex());
		this.device = device;
		this.rate = rate;
	}
	/**
	 * Ask the thread to stop the capture.
	 */
	public void stopCapture() {
		this.capture = false;
	}
	/**
	 * Start the thread.
	 */
	public void startCapture() {
		this.capture = true;
		this.start();
	}
	/**
	 * Run webcam capture until stopCapture is called.
	 */
	public void run() {
		try{
			// Configure device and decompressor
			logger.debug("Configuring webcam device...");
			configureDevice();
			logger.debug("Configuring frame decompressor...");
			configureDecompressor();
			logger.info("Webcam capture started.");
		}catch( Exception e ){
			logger.error(e);
			capture = false;
		}
		available = true;
		// Caputre loop
		while( capture ){
			// Sometimes call back functions are disabled.
			device.forceCallBacks();
			device.grabFrame();
			try{
				Thread.sleep(rate);
			}catch (Exception e) {
				logger.error(e);
				capture = false;
			}
		}
		logger.debug("Disconnecting webcam device...");
		// Destroy window and disconnect
		device.stop();
		if( decompressVideo != null ){
			try{
				if( decompressVideo.isOpened() ){
					logger.debug("Free decompression resources...");
					decompressVideo.freeResources();
				}
			}catch (CompressionException e) {
				logger.error(e);
			}finally{
				try{
					if( decompressVideo.isOpened() ){
						logger.debug("Closing decompression driver...");
						decompressVideo.close();
					}
				}catch (CompressionException e) {
					logger.error(e);
				}
			}
		}
		logger.info("Webcam capture stopped.");
	}
	/**
	 * Configure the device.
	 * @throws Exception 
	 */
	private void configureDevice() throws Exception {
		//Create the capture window
		device.createCaptureWindow("Webcam device", 640, 480, 0, 0);
		if( !device.isCaptureWindowCreated() )
			throw new Exception("Unable to create webcam capture window!");
		
		// Add listeners
		device.addDeviceErrorListener( errorListener );
		device.addDeviceStatusListener( statusListener );
		device.addDeviceFrameListener( frameListener );
		
		// Connect the window to device driver
		device.connect();
		if( !device.isConnected() )
			throw new Exception("Unable to connect webcam capture window to the webcam driver!");
		logger.debug("Webcam device is now connected to the webcam window. Do not close this program before calling stopCapture. Otherwise you can cause damage to your video device.");
		
		device.setScale(false);
		device.setPreview(false);
		device.setPreviewRate(rate);
	}
	/**
	 * Configure the decompressor
	 * @throws CompressionException If no compressor found.
	 */
	private void configureDecompressor() throws CompressionException {
		// Get back device bit map info input
		BitmapInfoHeader bitmapInfoInput = device.getBitMapInfo().bmiHeader;
		
		// Build the output format
		bitmapInfoOutput = new BitmapInfoHeader();
		bitmapInfoOutput.biBitCount = 24;
		bitmapInfoOutput.biCompression = BitmapInfoHeader.BI_RGB;
		bitmapInfoOutput.biHeight = bitmapInfoInput.biHeight;
		bitmapInfoOutput.biWidth = bitmapInfoInput.biWidth;
		bitmapInfoOutput.biSizeImage = bitmapInfoInput.biSizeImage = 0;
		bitmapInfoOutput.biSize = bitmapInfoInput.biSize = bitmapInfoInput.size();
		bitmapInfoOutput.biPlanes = bitmapInfoInput.biPlanes = 1;
		bitmapInfoOutput.biXPelsPerMeter = bitmapInfoOutput.biYPelsPerMeter = bitmapInfoInput.biXPelsPerMeter = bitmapInfoInput.biYPelsPerMeter = 0;
		bitmapInfoOutput.biClrUsed = bitmapInfoOutput.biClrImportant = bitmapInfoInput.biClrUsed = bitmapInfoInput.biClrImportant = 256;

		Codec codecInput = Codecs.getCodec(bitmapInfoInput.biCompression);
		if (codecInput != null){
			logger.info("Device input codec is " + codecInput.getFourCCString() + ": " + codecInput.getLongName());
		}
		Codec codecOutput = Codecs.getCodec(bitmapInfoOutput.biCompression);
		if (codecOutput != null){
			logger.info("Device output codec is " + codecOutput.getFourCCString() + ": " + codecOutput.getLongName());
		}
		// Find a decompressor from the input format to the output
		decompressVideo = DecompressVideo.findDecompressorVideo(bitmapInfoInput, bitmapInfoOutput);
		
		//Check if a decompressor was found
		if( decompressVideo == null ){
			throw new CompressionException("No decompressor found from this input codec to this output.", ICM.ICERR_BADFORMAT);
		}
		
		// Allocate decompressed data buffer
		decompressedData = new Memory(3
				* bitmapInfoOutput.biHeight * bitmapInfoOutput.biWidth);
		
		// Opening decompression driver
		decompressVideo.open();
		
		// Begin decompression
		decompressVideo.begin(bitmapInfoInput, bitmapInfoOutput);
	}
	/**
	 * Read decompressed datas in memory.
	 * Warning NO Thread safe.
	 * @return The decompressed data.
	 */
	private byte[] getDatas(){
		return decompressedData.getByteArray(0, (int) decompressedData.getSize());
	}
	/**
	 * A buffered image of the decompressed data.
	 * @return The decompressed image.
	 */
	public BufferedImage getBufferedImage(){
		BufferedImage image = null;
		synchronized (decompressedData) {
			byte[] data = getDatas();
			image = convertToAWT(data, bitmapInfoOutput.biWidth, bitmapInfoOutput.biHeight );
		}		
		return image;
	}

	/**
	 * Get a JPG image of the decompressed datas as byte array.
	 * @param imageQuality The image quality.
	 * @return Byte array of the JPG image data.
	 */
	public byte[] getJpgBuffer( float imageQuality ){
		BufferedImage bufferImage = getBufferedImage();
		ByteArrayOutputStream outputArray = new ByteArrayOutputStream();

        JPEGImageEncoder jpegEncoder = JPEGCodec.createJPEGEncoder(outputArray);
        JPEGEncodeParam jpegParam = jpegEncoder.getDefaultJPEGEncodeParam(bufferImage);
        jpegParam.setQuality(imageQuality, false);
        jpegEncoder.setJPEGEncodeParam(jpegParam);
        try
        {
            jpegEncoder.encode(bufferImage);
            outputArray.close();
        } catch (java.io.IOException IOEx) {IOEx.printStackTrace();}

        return outputArray.toByteArray();
	}
	
	/**
	 * Converts a byte data image to a AWT 
	 * <code>BufferedImage</code>.
	 * @param data The byte data array to be converted.
	 * @return The AWT image version.
	 */
	 private BufferedImage convertToAWT(byte[] data, int width, int height) {
	    ColorModel colorModel = null;
	      colorModel = new DirectColorModel(24, 0xFF, 0xFF00, 0xFF0000);
	      BufferedImage bufferedImage = new BufferedImage(colorModel,
	          colorModel.createCompatibleWritableRaster(width,height), false, null);
	      WritableRaster raster = bufferedImage.getRaster();
	      int[] pixelArray = new int[3];
	      for (int y = 0; y < height; y++) {
	        for (int x = 0; x < width * 3; x+=3) {
	          pixelArray[0] = data[ ( height - y - 1) * width * 3 + x + 2 ];
	          pixelArray[1] = data[ ( height - y - 1) * width * 3 + x + 1 ];
	          pixelArray[2] = data[ ( height - y - 1) * width * 3 + x];
	          raster.setPixel(x / 3, y, pixelArray);
	        }
	      }
	      return bufferedImage;
	  }
	private DeviceErrorListener errorListener = new DeviceErrorListener(){
		/**
		 * Fire the listener that the device throws an error message.
		 * 
		 * @param device
		 *            The device in error state.
		 * @param errorId
		 *            The error id is one of the constants below.
		 * @param errorMessage
		 *            The error message.
		 */
		public void deviceError(Device device, int errorId, String errorMessage){
			logger.error(device + "=>" + errorId + ":" + errorMessage);
		}
	};
	private DeviceStatusListener statusListener = new DeviceStatusListener(){
		/**
		 * Fire the listener that the device fire a status message.
		 * 
		 * @param device
		 *            The device.
		 * @param statusId
		 *            The status id is one of the constants below.
		 * @param statusMessage
		 *            The status message.
		 */
		public void deviceStatus(Device device, int statusId, String statusMessage){
			logger.info(device + "=>" + statusId + ":" + statusMessage);
		}
			
	};
	private DeviceFrameListener frameListener = new DeviceFrameListener(){
		/**
		 * 
		 * @param device The device
		 * @param videoHDR The video header
		 * @param data The frame data.
		 */
		public void frame(Device device, VideoHDR videoHDR, Memory data){
			try{
				synchronized (decompressedData) {
					//Decompress data
					decompressVideo.decompress(ICM.ICDECOMPRESS_HURRYUP,
							data, decompressedData);
				}
			}catch (CompressionException e) {
				logger.error(e);
				// Stop the capture
				capture = false;
			}
		}
	};
	/**
	 * Check if the webcam capture continue.
	 * @return True if capture frame processing, false otherwise.
	 */
	public boolean isCapture() {
		return capture;
	}
	/**
	 * Check if all is ok.
	 * @return True if both device and decompressor are set.
	 */
	public boolean isAvailable() {
		return available;
	}
}

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