--[[
@title raw avg
@param a op: 0=sum 1=avg
@default a 1
 
based on work by fudgey and dsvilko
http://chdk.setepontos.com/index.php/topic,2646.0.html
--]]
 
function fastshoot()
  press("shoot_half")
  repeat 
    sleep(1)
  until get_shooting() == true
  log("shooting...")
  press("shoot_full")
  release("shoot_full")
  release("shoot_half")
  repeat
    sleep(1)
  until get_shooting() ~= true
end
 
logfile=io.open("A/rawavg.log","wb")
io.output(logfile)
 
function log(...)
	io.write(...)
	io.write("\n")
end
 

log("Image directory:", get_image_dir())
print("Image directory:", get_image_dir())
log("Exposure count:", get_exp_count())
print("Exposure count:", get_exp_count())

ex=get_exp_count()
img1=string.format('%s/CRW_%04d.CRW',get_image_dir(),ex%10000)
img2=string.format('%s/CRW_%04d.CRW',get_image_dir(),(ex-1)%10000)
jpg1=string.format('%s/IMG_%04d.JPG',get_image_dir(),ex%10000)
jpg2=string.format('%s/IMG_%04d.JPG',get_image_dir(),(ex-1)%10000)
img3=string.format('%s/SND_%04d.CRW',get_image_dir(),ex%10000)

-- begin averaging two raws
raw_merge_start(1)
log("raw_merge_start(1)")
print("raw_merge_start(1)")

raw_merge_add_file(img2)
raw_merge_add_file(img1)
raw_merge_end()
log("raw_merge_end()")
print("raw_merge_end()")

os.remove(jpg1)
os.remove(jpg2)

set_raw_develop(img3)
log("set_raw_develop(",img3,")")
print("set_raw_develop(",img3,")")
fastshoot()

log("done!")
logfile:close()