1) For some cameras you may get some additional WB data from EXIF/Makernotes fields. LibRaw only parses camera 'as shot' coefficients for most cameras.
2)
cam_mul is camera (as shot) white balance.
pre_mul is daylight white balance (calculated from Adobe camera matrix)
1) For some cameras you may get some additional WB data from EXIF/Makernotes fields. LibRaw only parses camera 'as shot' coefficients for most cameras.
2)
cam_mul is camera (as shot) white balance.
pre_mul is daylight white balance (calculated from Adobe camera matrix)