O'Grady, Paul Christopher <cpo@slac.stanford.edu> 
2019-02-01, 11:39 AM             
      
Hi Mikhail and Chuck,
For developing the area detector det xface I created a jungfrau xtc2 file using Eliseo’s translation scripts:
~cpo/git/lcls2/psana/psana/dgramPort/jungfrau.xtc2

Instructions for running his translator are on this page:
https://github.com/slac-lcls/lcls2/tree/master/psana/psana/dgramPort
slac-lcls/lcls2
github.com
Contribute to slac-lcls/lcls2 development by creating an account on GitHub.
The python script below dumps configuration information and event data.  I think the two goals should be:
- have the script below be able to call a psalg C++ det.calib (via cython?)
- the drp be able to use the psalg C++ as well

chris

from psana import DataSource
ds = DataSource('jungfrau.xtc2')
run = next(ds.runs())
dg_cfg = run.configs[0]
print('Found cfg version',dg_cfg.software.myjungfrau.cfg.version)
print('Found raw version',dg_cfg.software.myjungfrau.raw.version)
print('Config number of pixels:',dg_cfg.myjungfrau.cfg.numPixels)
for evt in ds.events():
    dg = evt._dgrams[0]
    print(dg.myjungfrau.raw.frame.shape)

====
- the drp be able
to use the psalg C++ as well

Thinking about it, I think the way to start might be for me to give
 you some C++ code that “simulates” what the drp will give you: a 
configure datagram and event data.  I think Chuck and I did this with 
the HSD.
After this “drp” version works,  we think about the python wrapping, I guess.
chris

O'Grady, Paul Christopher <cpo@slac.stanford.edu> 
2019-02-04, 7:32 PMChun Hong Yoon <yoon82@stanford.edu>;Dubrovin, Mikhail             
                   
Mikhail, Chuck,

I committed some c++ code to read the jungfrau xtc2 file and dump out 
information from configure and events.  I suspect this will be useful 
for area detector development because this detector is different from 
HSD: it doesn’t have “opaque” data, just fundamental types (int, float, 
array...).  That means the c++ drp code has to loop over those 
fundamental types (which this code does).

Mostly you need to look at the 20 lines following the command “// get 
data out of the configure transition”, as well as the 15-line “dump()” 
routine, since other stuff will be hidden from you in the DRP.  Might be
 most efficient if we discuss in-person.

It is in xtcdata/xtcdata/app/jungfrau.cc.  I didn’t officially “install”
 the binary, since it’s just crude example code, so it’s not in the 
PATH, so you’ll have to run it from the xtcdata/build directory like 
this:

xtcdata/app/jungfrau -f ~cpo/git/lcls2/psana/psana/dgramPort/jungfrau.xtc2 -n 3

It will take some patience to figure out the best patterns to handle the
 area detectors (since it is different than the opaque HSD data).  But I
 believe the ideas are solid, as best I can tell.
chris