Fix selection of gain in lpdalgs

src/cal_tools/lpdalgs.pyx

@@ -47,8 +47,8 @@ def correct_lpd_frames(
         for ss in range(in_raw.shape[1]):
             for fs in range(in_raw.shape[2]):
                 # Decode intensity and gain from raw data.
-                data = <data_t>(in_raw[frame, ss, fs] & 0x0000111111111111)
-                gain = <gain_t>((in_raw[frame, ss, fs] & 0x0000000000000011
+                data = <data_t>(in_raw[frame, ss, fs] & 0xFFF)
+                gain = <gain_t>((in_raw[frame, ss, fs] & 0x3000) >> 12)
 
                 if gain <= 2:
                     mask = ccv_mask[ss, fs, cell, gain]