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|
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.imageio.ImageIO;
import javax.swing.JApplet;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.EventListenerList;
public class MyApplet extends JApplet {
private static final long serialVersionUID = 1L;
private Thread mythread = null;
MJPEGBeanA axPanel = null;
public void init()
{
// TODO Auto-generated method stub
super.init();
axPanel = new MJPEGBeanA();
this.getContentPane().add(axPanel);
this.setVisible(true);
}
public void start()
{
mythread = new Thread(axPanel);
mythread.start();
}
}
class MJPEGBeanA extends JComponent implements Runnable, ChangeListener{
private static final long serialVersionUID = 1L;
// URL Caméra Japon Tohoku
public String mjpgURL = "http://130.34.82.18/cgi-bin/video640x480.mjpg";
String username = "root";
String password = "root";
String base64authorization = null;
private Image image = null;
private boolean connected = false;
private boolean initCompleted = false;
HttpURLConnection huc = null;
Runnable updater;
/**
* Used to calculate an average FPS
*/
long[] frameTimes = new long[10];
MJPEGParserA parser;
/** Creates a new instance of AxisCamera */
public MJPEGBeanA() {
// only uwse authorization if all informations are available
if (username != null && password != null) {
base64authorization = encodeUsernameAndPasswordInBase64(username, password);
}
setForeground(Color.YELLOW);
setFont(new Font("Dialog", Font.BOLD, 12));
/**
* See the stateChanged() function
*/
updater = new Runnable() {
public void run() {
if (!initCompleted) {
initDisplay();
}
repaint();
for (int i = 0; i < frameTimes.length - 1; i++) {
frameTimes[i] = frameTimes[i + 1];
}
frameTimes[frameTimes.length - 1] = System.currentTimeMillis();
}
};
}
private String encodeUsernameAndPasswordInBase64(String usern, String psswd) {
//String s = usern + ":" + psswd;
String encs = ("cm9vdDpyb290");
return "Basic " + encs;
}
public void connect() {
try {
URL u = new URL(mjpgURL);
huc = (HttpURLConnection) u.openConnection();
if (base64authorization != null) {
huc.setDoInput(true);
huc.setRequestProperty("Authorization", base64authorization);
huc.connect();
}
String boundary = "--myboundary";
String contentType = huc.getContentType();
Pattern pattern = Pattern.compile("boundary=(.*)$");
Matcher matcher = pattern.matcher(contentType);
try {
matcher.find();
boundary = matcher.group(1);
} catch (Exception e) {
}
InputStream is = huc.getInputStream();
connected = true;
parser = new MJPEGParserA(is, boundary);
parser.addChangeListener(this);
} catch (IOException e) {
try {
huc.disconnect();
Thread.sleep(60);
} catch (InterruptedException ie) {
huc.disconnect();
}
connect();
} catch (Exception e) {
;
}
}
public void initDisplay() { // setup the display
if (image != null) {
Dimension imageSize = new Dimension(image.getWidth(this), image.getHeight(this));
setPreferredSize(imageSize);
SwingUtilities.getWindowAncestor(this).pack();
initCompleted = true;
}
}
public void disconnect() {
try {
if (connected) {
parser.setCanceled(true);
connected = false;
}
} catch (Exception e) {
;
}
}
NumberFormat decFormat = DecimalFormat.getNumberInstance();
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (image != null) {
g.drawImage(image, 0, 0, this);
}
long timeBetweenFrames = 0;
for (int i = 0; i < frameTimes.length - 1; i++) {
timeBetweenFrames += frameTimes[i + 1] - frameTimes[i];
}
timeBetweenFrames /= frameTimes.length - 1;
g.setColor(getForeground());
g.setFont(getFont());
if (timeBetweenFrames > 0) {
String fps = decFormat.format(1000.0 / timeBetweenFrames) + " fps";
g.drawString(fps, 0, g.getFontMetrics().getHeight());
}
}
public void run() {
connect();
try {
parser.parse();
} catch (IOException e) {
e.printStackTrace();
}
}
public void stateChanged(ChangeEvent e) {
byte[] segment = parser.getSegment();
if (segment.length > 0) {
try {
image = ImageIO.read(new ByteArrayInputStream(segment));
EventQueue.invokeLater(updater);
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
public static void main(String[] args) {
JFrame jframe = new JFrame();
jframe.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
MJPEGBeanA axPanel = new MJPEGBeanA();
new Thread(axPanel).start();
jframe.getContentPane().add(axPanel);
jframe.pack();
jframe.setVisible(true);
}
}
class MJPEGParserA {
private static final byte[] JPEG_START = new byte[] { (byte) 0xFF, (byte) 0xD8 };
private static final int INITIAL_BUFFER_SIZE = 4096;
InputStream in;
byte[] boundary;
byte[] segment;
byte[] buf;
int cur, len;
boolean canceled = false;
protected EventListenerList listenerList = new EventListenerList();
public boolean isCanceled() {
return canceled;
}
public void setCanceled(boolean canceled) {
this.canceled = canceled;
if (canceled) {
try {
in.close();
System.exit(0);
} catch (IOException e) {
}
}
}
public MJPEGParserA(InputStream in, String boundary) {
this.in = in;
this.boundary = boundary.getBytes();
buf = new byte[INITIAL_BUFFER_SIZE];
cur = 0;
len = INITIAL_BUFFER_SIZE;
}
public void parse() throws IOException {
int b;
while ((b = in.read()) != -1 && !canceled) {
append(b);
if (checkBoundary()) {
processSegment();
cur = 0;
}
}
}
/**
* Processes the current byte buffer. Ignores the last len(BOUNDARY) bytes in the buffer. Searches through the buffer
* for the start of a JPEG. If a JPEG is found, the bytes comprising the JPEG are copied into the
* <code>segment</code> field. If no JPEG is found, nothing is done.
*
*/
protected void processSegment() {
boolean found = false;
int i;
for (i = 0; i < cur - JPEG_START.length; i++) {
if (segmentsEqual(buf, i, JPEG_START, 0, JPEG_START.length)) {
found = true;
break;
}
}
if (found) {
int segLength = cur - boundary.length - i;
segment = new byte[segLength];
System.arraycopy(buf, i, segment, 0, segLength);
fireChange();
}
}
public byte[] getSegment() {
return segment;
}
protected boolean segmentsEqual(byte[] b1, int b1Start, byte[] b2, int b2Start, int len) {
if (b1Start < 0 || b2Start < 0 || b1Start + len > b1.length || b2Start + len > b2.length) {
return false;
} else {
for (int i = 0; i < len; i++) {
if (b1[b1Start + i] != b2[b2Start + i]) {
return false;
}
}
return true;
}
}
protected boolean checkBoundary() {
return segmentsEqual(buf, cur - boundary.length, boundary, 0, boundary.length);
}
public int getBufferSize() {
return len;
}
protected void append(int i) {
if (cur >= len) {
byte[] newBuf = new byte[len * 2];
System.arraycopy(buf, 0, newBuf, 0, len);
buf = newBuf;
len = len * 2;
}
buf[cur++] = (byte) i;
}
public void addChangeListener(ChangeListener l) {
listenerList.add(ChangeListener.class, l);
}
public void removeChangeListener(ChangeListener l) {
listenerList.remove(ChangeListener.class, l);
}
public ChangeListener[] getChangeListeners() {
return (ChangeListener[]) listenerList.getListeners(ChangeListener.class);
}
protected void fireChange() {
Object[] listeners = listenerList.getListenerList();
ChangeEvent e = null;
for (int i = listeners.length - 2; i >= 0; i -= 2) {
if (listeners[i] == ChangeListener.class) {
if (e == null)
e = new ChangeEvent(this);
((ChangeListener) listeners[i + 1]).stateChanged(e);
}
}
}
} |
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