[kepler-dev] JAI actors

[Nandita Mangal]

hi Christopher,
Sorry i haven't visited this topic for a long time...

 I believe that the ptolemy JAIImageReader is causing some codec 
problem  in reading certain images.I have JAI actors working in Kepler 
otherwise.

I wrote another way of getting the Image and then passed the image ( as 
a JAIImageToken) on to Ptolemy JAI actors and got no codec related
exceptions in reading/processing the image.
I believe using the SeekableStream in JAIImageReader might generate 
similar factory error in some cases?? We can catch such codec exceptions
in the JAIImageReader and try a second way of reading the image?
Here is another way of reading the image (which can be used in the case 
that the normal loading file way fails)
        //_fileRoot indicates the filepath of image
         ParameterBlock pb =  (new ParameterBlock()).add(_fileRoot);
          RenderedOp img = new RenderedOp("fileload", pb, null);
         output.broadcast(new JAIImageToken(img));
Once I add the above, we can make Ptolemy JAI classes compile also from 
the build-ptolemy.xml buildfile in Kepler and add the actors to Kepler 
library.

thanks,
nandita.


Here is the exception:
     [java] Error: IOException occurs when search for propriate codecs.
     [java] Occurs in: com.sun.media.jai.codec.ImageCodec
     [java] java.io.IOException: The handle is invalid
     [java]     at java.io.RandomAccessFile.seek(Native Method)
     [java]     at 
com.sun.media.jai.codec.FileCacheSeekableStream.readUntil(Fil
eCacheSeekableStream.java:129)
     [java]     at 
com.sun.media.jai.codec.FileCacheSeekableStream.read(FileCach
eSeekableStream.java:266)
     [java]     at 
com.sun.media.jai.codec.SeekableStream.readFully(SeekableStre
am.java:327)
     [java]     at 
com.sun.media.jai.codec.SeekableStream.readFully(SeekableStre
am.java:306)
     [java]     at 
com.sun.media.jai.codec.ImageCodec.getDecoderNames(ImageCodec
.java:274)
     [java]     at 
com.sun.media.jai.opimage.StreamRIF.create(StreamRIF.java:80)

     [java]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
     [java]     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcces
sorImpl.java:39)
     [java]     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMet
hodAccessorImpl.java:25)
     [java]     at java.lang.reflect.Method.invoke(Method.java:585)
     [java]     at 
javax.media.jai.FactoryCache.invoke(FactoryCache.java:130)
     [java]     at 
javax.media.jai.OperationRegistry.invokeFactory(OperationRegi
stry.java:1682)
     [java]     at 
javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(Thr
eadSafeOperationRegistry.java:481)
     [java]     at 
javax.media.jai.registry.RIFRegistry.create(RIFRegistry.java:
340)
     [java]     at 
javax.media.jai.RenderedOp.createInstance(RenderedOp.java:830
)
     [java]     at 
javax.media.jai.RenderedOp.createRendering(RenderedOp.java:87
8)
     [java]     at 
javax.media.jai.RenderedOp.getRendering(RenderedOp.java:899)
     [java]     at 
javax.media.jai.RenderedOp.createInstance(RenderedOp.java:810
)
     [java]     at 
javax.media.jai.RenderedOp.createRendering(RenderedOp.java:87
8)
     [java]     at 
javax.media.jai.RenderedOp.getRendering(RenderedOp.java:899)
     [java]     at 
ptolemy.actor.lib.jai.JAIImageToken.asAWTImage(JAIImageToken.
java:95)
     [java]     at 
ptolemy.actor.lib.image.ImageTableau.display(ImageTableau.jav
a:197)
     [java]     at 
ptolemy.actor.lib.image.ImageTableau.append(ImageTableau.java
:139)
     [java]     at 
ptolemy.actor.gui.TokenEffigy.setTokens(TokenEffigy.java:226)

     [java]     at 
ptolemy.actor.lib.image.ImageDisplay._display(ImageDisplay.ja
va:243)
     [java]     at 
ptolemy.actor.lib.image.ImageDisplay$2.run(ImageDisplay.java:
209)
     [java]     at 
java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:
209)
     [java]     at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
     [java]     at 
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDi
spatchThread.java:242)
     [java]     at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDisp
atchThread.java:163)
     [java]     at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.j
ava:157)
     [java]     at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.j
ava:149)
     [java]     at 
java.awt.EventDispatchThread.run(EventDispatchThread.java:110
)
     [java] Exception in thread "AWT-EventQueue-0" 
java.lang.RuntimeException: -
 Unable to render RenderedOp for this operation.
     [java]     at 
javax.media.jai.RenderedOp.createInstance(RenderedOp.java:838
)
     [java]     at 
javax.media.jai.RenderedOp.createRendering(RenderedOp.java:87
8)
     [java]     at 
javax.media.jai.RenderedOp.getRendering(RenderedOp.java:899)
     [java]     at 
javax.media.jai.RenderedOp.createInstance(RenderedOp.java:810
)
     [java]     at 
javax.media.jai.RenderedOp.createRendering(RenderedOp.java:87
8)
     [java]     at 
javax.media.jai.RenderedOp.getRendering(RenderedOp.java:899)
     [java]     at 
ptolemy.actor.lib.jai.JAIImageToken.asAWTImage(JAIImageToken.
java:95)
     [java]     at 
ptolemy.actor.lib.image.ImageTableau.display(ImageTableau.jav
a:197)
     [java]     at 
ptolemy.actor.lib.image.ImageTableau.append(ImageTableau.java
:139)
     [java]     at 
ptolemy.actor.gui.TokenEffigy.setTokens(TokenEffigy.java:226)

     [java]     at 
ptolemy.actor.lib.image.ImageDisplay._display(ImageDisplay.ja
va:243)
     [java]     at 
ptolemy.actor.lib.image.ImageDisplay$2.run(ImageDisplay.java:
209)
     [java]     at 
java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:
209)
     [java]     at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
     [java]     at 
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDi
spatchThread.java:242)
     [java]     at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDisp
atchThread.java:163)
     [java]     at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.j
ava:157)
     [java]     at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.j
ava:149)
     [java]     at 
java.awt.EventDispatchThread.run(EventDispatchThread.java:110
)