Problem with imageio: ImageReader stalls on JPEGs at ~95%

From: Aaron Davies (aaron.davies_at_gmail.com)
Date: 06/25/04 

Date: 25 Jun 2004 11:01:22 -0700

I'm trying to write some classes for my collaborative whiteboard to
transmit images over the network, using the javax.imageio API, but I'm
running into an odd problem: my code words fine with PNGs, but not
with JPEGs. As you can see below, I've attached a progress listener to
the reader, which reports progress up to just under 95%, then nothing.
The warning listener reports no warnings. The images are written by an
ImageWriter in another section of the code, which also uses the same
listeners, and *does* report completion w/o warnings. With PNGs, the
read completes just fine. Any help would be much appreciated; snippets
follow. (ImageStatusUpdater is a class of mine which implements
IIOReadProgressListener, IIOWriteProgressListener,
IIOReadWarningListener, and IIOWriteWarningListener.)

>From the writer's code:

Socket _soc = serverSocket.accept();
ImageWriter _writer = (ImageWriter)
ImageIO.getImageWritersByFormatName(
    format).next();
ImageStatusUpdater _isu = new ImageStatusUpdater();
_writer.addIIOWriteProgressListener(_isu);
_writer.addIIOWriteWarningListener(_isu);
_writer.setOutput(ImageIO.createImageOutputStream(_soc
    .getOutputStream()));
_writer.write(image);

And the reader's:

Socket _socket = new Socket(ip, port);
ImageReader _ir = (ImageReader) ImageIO.
    getImageReadersBySuffix(suffix).next();
ImageStatusUpdater _isu = new ImageStatusUpdater();
_ir.addIIOReadProgressListener(_isu);
_ir.addIIOReadWarningListener(_isu);
InputStream _is = _socket.getInputStream();
ImageInputStream _iis = ImageIO.createImageInputStream(_is);
_ir.setInput(_iis, true, true);
imageIcon.setImage(_ir.read(0));

Relevant Pages

  • Problem with imageio: ImageReader stalls on JPEGs at ~95%
    ... transmit images over the network, using the javax.imageio API, but I'm ... ImageWriter in another section of the code, ... ImageStatusUpdater _isu = new ImageStatusUpdater; ... Socket _socket = new Socket ...
    (comp.lang.java)
  • Problem with imageio: ImageReader stalls on JPEGs at ~95%
    ... transmit images over the network, using the javax.imageio API, but I'm ... ImageWriter in another section of the code, ... ImageStatusUpdater _isu = new ImageStatusUpdater; ... Socket _socket = new Socket ...
    (comp.lang.java.developer)
  • Problem with imageio: ImageReader stalls on JPEGs at ~95%
    ... transmit images over the network, using the javax.imageio API, but I'm ... ImageWriter in another section of the code, ... ImageStatusUpdater _isu = new ImageStatusUpdater; ... Socket _socket = new Socket ...
    (comp.lang.java.programmer)