plugins/lens/lensID

   1 -- Retrieve the lens ID data
   2 -- Called from the pre-formatted tag lua.lensID
   3 -- Requires lua and extftool
   4 -- Runs rather slow
   5
   6 n = 0
   7 m = 0
   8 lensID = ""
   9 lensIDstring = ""
  10
  11 path = Image:get_path()
  12
  13 lensIDfile = io.popen("exiftool -Composite:LensID \"" .. path .. "\" 2>/dev/null ")
  14 lensID = lensIDfile:read("*a")
  15
  16 if lensID ~= ""
  17 then
  18         n = string.find(lensID, ":")
  19         if n > 2
  20         then
  21                 n = n + 2
  22                 lensIDstring = string.sub(lensID, n)
  23                 m = string.find(lensIDstring, "Unknown")
  24                 if m ~= nil
  25                 then
  26                         lensIDstring = ""
  27                 else
  28                         lensIDstring = string.gsub(lensIDstring, "\n", "")
  29                 end
  30         end
  31 end
  32
  33 lensIDfile:close()
  34 return (lensIDstring)