Messages

1

Personal Java/Jeode/J2ME Personal Profile / Can Zaurus Handle This?

« on: October 15, 2004, 04:51:49 pm »

Another update:

The real culprit is this bad boy:

if(!mediaTracker.waitForID(0,2000)) {  
        System.out.println("Failed to load image");
}

If i put a timer around it, it takes 1900 milliseconds to complete load a 320x240 jpeg.  Yay for 0.5 fps

I am using /opt/Qtopia/j2me/bin/cvm (J2ME PP 1.0) on the SL-6000, to reiterate.

If anybody knows how to speed this up please let me know.

Maybe there is a native library for writing to the graphics buffer.

If not, this means I have to scratch this whole application in Java and try Qtopia/C++.  Please NO!

2

Personal Java/Jeode/J2ME Personal Profile / Can Zaurus Handle This?

« on: October 15, 2004, 03:07:17 pm »

Omicron,

Thanks for the very informative response.

The good news is that I'm not completely nuts and had no intentions of running 640x480 @ say 30 fps...my 1.6 p4 development laptop even chokes when I try that kind of silliness

I have been trying 320x240 from the start, default compression, 15 fps, then 10 fps, then lower...then lower...all with no success.

I am using the 640x480 real estate for additional buttons and textareas around the video canvas panel.

What I have learned today is that my application recieves a 320x240 jpeg, decodes, sends to g.drawImage() and keeps going.  The problem is that g.drawImage() is not updating the image.  my update() routine is written to prevent re-drawing the background of course and only calls repaint().

After testing this extensively I have found that if I give paint() (g.drawImage specifically) something like 2 WHOLE SECONDS then my image is updated.

Does this seem likely, that my entire bottleneck / delay is attributed to g.drawImage?  I mean, come on, I know the video card must be capable since this thing can play mini-movies, so perhaps the g.drawImage routine for the J2ME PP is really really slow.

I'm continuing to test this theory in more detail (How I dont know, but I'll figure something out)

Otherwise, "sysinfo" is good, thanks.  My app uses about 7 MB.

And the "-green" option did not work.  maybe its one of the more complex options i saw like "-NoSuperCrazyThreadsOfDoomXPDmjdkGGG" so I'll try to investigate those.

3

Personal Java/Jeode/J2ME Personal Profile / Can Zaurus Handle This?

« on: October 14, 2004, 03:41:59 pm »

I've completed an application that recieves streaming jpeg or MJPEG in a panel on the zaurus, in addition I have a few buttons which send various UDP packets when pressed.  The problem is that the SL-6000 using Jeode just can't seem to handle it.  Below I have details and different categories for which the problem might be attributed.  Any help or info would be very appreciated as there seems to be very little in the way of dev info for the SL-6000.

Processor/Video?

The problem I'm having seems to be an issue with the speed of the SL-6000's processor or video display rates.  I have set the speed of the MJPEG to as low as 5 frames per second and the zaurus still only shows like 1 frame update every 3 seconds or less.

Too many threads

I am using Jeode (evm) to run the application and the other strange thing I notice is what seems like nearly 25 different instances of Jeode (evm) that run when I invoke this application.  Granted, I have one thread which plays the stream in addition to the main frame, but why 25 instances?

Memory

Perhaps there is not enough application memory...How could I monitor this?

'top' for Zaurus

Even better is there an equivalent for 'top' for the zaurus so I could monitor cpu/memory?

PersonalJava or J2ME PP

So far I have not installed J2ME PP.  I am using Jeode/PersonalJava.  Would this have better performance and is the installation pretty straightforward for the SL-6000?

Out of my Mind?

Maybe the SL-6000 just can't handle this and I should be shipped to the coconut farm.


Any help, info, experiences, or hello's are welcome...

4

Personal Java/Jeode/J2ME Personal Profile / Java is only 320x240 on SL-6000

« on: October 14, 2004, 03:17:45 pm »

I have written a few Java applications for the SL-6000 now and when the program is loaded it is only using a screen resolution of 240x320.  My application's window size is 480x640, so this means I have to grab the title bar and slide it around to see my entire application.  That is, its as if i have a "virtual desktop" of 480x640 with only a visible area of 240x320.

I am using the PersonalJava engine to launch as follows:
$QPEDIR/bin/evm -XappName=run-MyApp -cp $INSTALLDIR/java MyApp

Has anyone else experienced this?  If not I can post a chunk of the source (maybe its me).

If this is a known issue, anyone have a fix?  

Does this happen with the Sun J2ME download?

Any help is appreciated.

UPDATE

Looks like the SL-6000 is pre-installed with the J2ME PP 1.0 and if I invoke my same application from the command line with the following command it recognizes the 480x640 resolution.  Wooo Hooo!

/opt/Qtopia/j2me/bin/cvm MyApp

Regarding Jeode, still not fixed, but for now I'll use J2ME PP.