webcamera网络摄像头代码

/* * JWebcamPlayer.java * * Created on March 21, 2005, 1:31 AM */ /** * * @author Alvaro Salmador (nx5) (naplam33 at msn.com) */ import java.applet.*; import java.applet.AppletContext.*; import java.awt.*; import java.awt.event.*; import java.awt.image.*; import java.awt.Image; import java.net.URL; import javax.swing.*; //import javax.swing.table.*; import javax.imageio.*; //import java.util.*; import java.io.*; import java.net.*; public class JWebcamPlayer extends javax.swing.JApplet implements MouseListener, MouseMotionListener { public static final boolean DEBUGGING = false; public JWebcamPlayer() { } public static String checkAppletLoaded() { return "ok"; } public static int unsignedByteToInt( byte b ) { return (int) b & 0xff; } public void init() { m_strColor = getParameter("Color"); if (m_strColor==null || m_strColor=="") m_strColor = "#FFFFFF"; m_strServer = getCodeBase().getHost();//getParameter("Server"); if (m_strServer==null || m_strServer=="") m_strServer = "127.0.0.1"; m_strPort = getParameter("Port"); if (m_strPort==null || m_strPort=="") m_strPort = "7070"; overlay = toBufferedImage(getImage(getDocumentBase(), "control.jpg" )); do_overlay = false; addMouseListener(this); addMouseMotionListener(this); } public void createGUI() { setBackground(Color.decode(m_strColor)); try { //UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); //native UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName()); //java } catch(Exception e) { } Container content = getContentPane(); content.setBackground(Color.decode(m_strColor)); GridBagLayout gbl = new GridBagLayout(); content.setLayout(gbl); GridBagConstraints c = new GridBagConstraints(); c.fill = GridBagConstraints.BOTH; c.weighty = 1.0; c.weightx = 1.0; c.gridwidth = 1; c.anchor = GridBagConstraints.NORTHWEST; c.insets = new Insets(0, 0,0,0); c.gridheight = 1; c.gridx = 0; c.gridy = 0; m_label = new JLabel(); m_label.setHorizontalAlignment(SwingConstants.LEFT); m_label.setVerticalAlignment(SwingConstants.TOP); m_label.setText("JWebcamPlayer Applet"); content.add(m_label, c); } public void start() { m_stop = false; try { javax.swing.SwingUtilities.invokeAndWait(new Runnable() { public void run() { createGUI(); } } ); } catch (Exception e) { } m_worker = new SwingWorker() { public Object construct() { Socket connection; InputStream in; OutputStream out; try { int port = 0; try { port = Integer.parseInt(m_strPort); } catch(Exception e) { port = 0; } if (port==0) port = 7070; connection = new Socket(m_strServer, port); in = connection.getInputStream(); out = connection.getOutputStream(); } catch (IOException e) { System.out.println( "Attempt to create connection failed with error: " + e); m_label.setIcon(null); m_label.setText("JWebcamPlayer - Connection failed"); m_stop = true; return null; } byte [] buffer = new byte [512*1024]; m_label.setText(""); while(!m_stop) { // bucle, constantemente lee imagen del server y la muestra byte [] b = {'O','K',0,0, 0,0,0,0,0,0,0,0,0}; if(bright_up) { b[7] = 1; bright_up = false; } if(bright_down) { b[7] = 2; bright_down = false; } if(contrast_up) { b[8] = 1; contrast_up = false; } if(contrast_down) { b[8] = 2; contrast_down = false; } int n = 0; int siz = 0; try { out.write(b); if (DEBUGGING) System.out.print("-sending my header ("+Integer.toString(b.length)+") bytes"); n = in.read(buffer, 0, HDRLEN); /*while(n<HDRLEN && n>0) { int r = in.read(buffer, n, HDRLEN-n); if (r<=0) break; }*/ if (DEBUGGING) System.out.print("-read header ("+Integer.toString(n)+") bytes"); } catch(Exception e) { if (DEBUGGING) e.printStackTrace(); m_stop = true; } if (n<HDRLEN) { if (n<=0) m_stop = true; continue; } else { // can someone point out a more straightforward way to convert 4 bytes // to a java integer? this is just awful... int ssz = SZOFS; siz += unsignedByteToInt(buffer[ssz+3]) << 24; siz += unsignedByteToInt(buffer[ssz+2]) << 16; siz += unsignedByteToInt(buffer[ssz+1]) << 8; siz += unsignedByteToInt(buffer[ssz]) ; if (DEBUGGING) System.out.println("** reading jpeg, size="+Integer.toString(siz)); n = HDRLEN; if (buffer[0]!='S' || buffer[1]!='P' || buffer[2]!='C' || buffer[3]!='A') { if (DEBUGGING) System.out.println("*Header missing 'SPCA'"); continue; } else if (siz<=0 || siz>(512*1024)) { siz = 0; try { in.read(buffer, n, buffer.length); } catch(Exception e) { if (DEBUGGING) e.printStackTrace(); } if (DEBUGGING) System.out.println("*Illegal image size"); continue; } else { do { int r = 0; try { //r = in.read(buffer, n, HDLREN + siz - n); r = in.read(buffer, n, buffer.length - n); } catch(Exception e) { e.printStackTrace(); }