[Users] CactusIO::IOJpeg standard vs. remove mode / output format

[Thomas Radke]

Ole Weidner wrote:
> Aloha,
> 
> I'm using the IOJpeg thorn for continuous output slice generation for  
> an oceanographic model recently "ported" to cactus. The jpeg files are  
> used to create an mpeg4 movie once the simulation is done.
> Since I'm also using the HTTPD thorn for monitoring/steering, I'm  
> wondering if there's a rationale behind the fact that the IOJpeg thorn  
> doesn't generate the single "remove-mode"-style advertised jpeg file  
> that is used by the HTTPD thorn to provide a preview for the current  
> time-step. I modified my local copy of the IOJpeg (dev) thorn to  
> achieve this. Would it be in general interest to have a feature like  
> this in the Cactus development CVS?

If I got this right, you want to have the most recent jpeg image 
advertised when in "standard" mode (currently, nothing is advertised in 
this mode). Sounds like a reasonable suggestion to me.

In the patch you submitted the jpeg is now created twice when in 
"standard" mode. I think it can be rewritten in a more efficient way 
such that  it would generate only one image named after 
'filename_standard_mode' and then, depending on the mode, either rename 
("remove") or copy ("standard") it to 'filename_remove_mode'.

> Another rather minor annoyance (IMHO;-) is the naming of the  
> continuous output files: ...
> which makes a lexicographic ordering unnecessary difficult and usually  
> (depending on the processing tool - in my case mencoder) requires an  
> additional sorting step. Would it make sense to prepend a couple of  
> zeros to the format string (Write.c)? 

That is a good idea !

-- 
Cheers, Thomas.