Image streaming problem

> first of all, the server doesnt send the image it receives back to the

> users, i get this exception :

> Exception in thread "Thread-0" java.lang.ClassCastException:

> sun.awt.image.ToolkitImage

// try add this to check what pix value

System.out.println("debug : pix = "pix);

stream.writeObject(pix);

i think pix was null so writeObject(null) don't send anything to client socket.

> second of all... the fact that the image streaming won't work somehow

> influences the chat as well (which i don't understand why, i'm using

> different sockets for the two streams text/image so... one shouldn't

> affect the other, right?)

how you establish that two different socket? please post a little code. (Edit: please use code tags whenever you post code)

Message was edited by:

j_shadinata

j_shadinataa at 2007-7-12 18:18:49 >

10x a lot for answering.

so...

i added the line to check if pix was null ...

public void writeObject(Socket sImage, Image im) throws java.io.IOException

{

ObjectOutputStream stream=new ObjectOutputStream(sImage.getOutputStream());

PixelGrabber grabber = new PixelGrabber(im, 0,0, -1, -1, true);

try

{

grabber.grabPixels();// methode booleene - on demande les pixels

}

catch (InterruptedException e)

{

e.printStackTrace();

}

Object pix = grabber.getPixels();// on recupere les pixels

System.out.println("debug1 : pix = "+pix);

Dimension dim = new Dimension(((BufferedImage)im).getWidth(),((BufferedImage)im).getHeight());

// on recupere les dimensions de l'image

stream.writeObject(dim);// on envoye les dimensions

System.out.println("debug2 : pix = "+pix);

stream.writeObject(pix);// on envoye les pixels

}

I added it in two places because the first time i put it just before stream.writeObject(pix)

but in fact, it never reaches that line. It blocks in between, when i try to cast im to BufferedImage.... Debug1 shows that pix isn't null.

I get the dimension right: dimensionjava.awt.Dimension[width=492,height=430]

and i also get debug1 : pix = [I@11ddcde

As for the two sockets, i have this on the server side:

s=new Socket();

socketImage=new Socket();

ss=new ServerSocket(60001);

ssImage=new ServerSocket(60002);

then i create the streams

BufferedReader din = new BufferedReader(new InputStreamReader( socket.getInputStream() ));

BufferedWriter dout = new BufferedWriter(new OutputStreamWriter( socket.getOutputStream() ));

ObjectOutputStream imageOut=new ObjectOutputStream(socketImage.getOutputStream() );

ObjectInputStream imageIn=new ObjectInputStream(socketImage.getInputStream() );;

and then, i use the two methods to get the image, and than pass it on to all the clients (that are kept in an array list)

(this part in in a class named ServerThread and the two methodes and the array list are in a class Server)

try {

while (j.getStatut().equals("dessinateur"))

{

server.readObject(imageIn);//on essaie de lire les pixels

System.out.println("Recu!!");

if(server.image==null) System.out.println("crap");

System.out.println("nb utilisateurs"+server.monTableau.size());

for (int i=0; i<server.monTableau.size();i++) //on envoye les pixels a toute le monde

{Socket socketIm=server.monTableau.get(i).getSocketImage();

server.writeObject(socketIm,server.image);

}

sleep(100);

}

}

catch (InterruptedException e)

{ e.printStackTrace();

}

on the client side, i have

socket = new Socket( host, 60001 ); //socket texte

socketImage=new Socket(host, 60002); //socket image

System.out.println( "on est connecte a "+socket );

ta.setText( "Introduisez le login:" );

//creation de flux entree/sortie

din = new BufferedReader(new InputStreamReader( socket.getInputStream() ));

dout = new BufferedWriter(new OutputStreamWriter( socket.getOutputStream() ));

imageOut=new ObjectOutputStream(socketImage.getOutputStream() );

imageIn=new ObjectInputStream(socketImage.getInputStream() );

and the, to send the image:

canvas=dessinateur.frame.monCanvas1;

try{ writeObject(imageOut,canvas.createImage(canvas.getSize().width,canvas.getSize().height));}

catch( IOException ie ) {System.out.println("ma-sa!");}//on envoye l'image au serveur

imageOut.flush();

So if you have any ideas,... i'll be more than happy to hear them. and thanks again for looking into the problem!>

D@naa at 2007-7-12 18:18:49 >