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package photo;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.IOException;
import java.io.*;
import javax.microedition.*;
import javax.microedition.io.HttpConnection;
import javax.microedition.io.Connector;
import java.*;
import java.io.InputStream;
import java.io.OutputStream;
public class PhotoAlbum
extends MIDlet
implements CommandListener, ItemStateListener
{
private Display display;
public String imageName;
MJPEGParserA parser;
private PhotoFrame canvas;
HttpConnection c = null;
InputStream is = null;
OutputStream os = null;
class MJPEGParserA {
private final byte[] JPEG_START = new byte[] { (byte) 0xFF, (byte) 0xD8 };
private final int INITIAL_BUFFER_SIZE = 4096;
InputStream in;
byte[] boundary;
byte[] segment;
byte[] buf;
int cur, len;
boolean canceled = false;
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) {
append(b);
if (checkBoundary()) {
processSegment();
cur = 0;
}
}
}
protected void processSegment() {
Image source;
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);
source = Image.createImage(segment, 0, segLength);
canvas.drawImage(source);
display.setCurrent(canvas);
}
}
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;
}
}
void postViaHttpConnection(String url) throws IOException {
String boundary = "--myboundary";
try {
c = (HttpConnection)Connector.open(url);
is = c.openInputStream();
parser = new MJPEGParserA(is, boundary);
parser.parse();
} catch (ClassCastException e) {
throw new IllegalArgumentException("Not an HTTP URL");
} finally {
if (is != null)
is.close();
if (os != null)
os.close();
if (c != null)
c.close();
}
}
public PhotoAlbum() {
display = Display.getDisplay(this);
canvas = new PhotoFrame(this);
canvas.setCommandListener(this);
}
protected void startApp() {
try {
postViaHttpConnection("http://217.128.151.33/axis-cgi/mjpg/video.cgi?camera=1@fps=25@resolution=160x120");
}
catch(IOException e)
{
}
}
protected void pauseApp() {
}
protected void destroyApp(boolean unconditional) {
}
public void commandAction(Command c, Displayable s) {
}
public void itemStateChanged(Item item) {
}
} |
