Incorrect 'camera_whitebalance' matrix

[StudioPetrikas]

Hello and thank you once again for your excellent work.

Issue:

camera_whitebalance returns [0, 1, 0], when As Shot White XY is used in the EXIF (instead of a more common As Shot Neutral)

Usually, when the WB is presented in a different manner, camera_whitebalance returns [0, 0, 0]

However, when processing is done with use_camera_wb = True the output image is balanced to "As Shot" properly, which mean that libraw or rawpy does calculate it OK somewhere, somehow.

Extra info:

I am trying to implement a different highlight-recovery method than the ones provided by libraw. Which means I need to work on un-scaled, un-balanced, un-matrix'ed values, which, after recovery, I have to re-scale, re-balance and re-matrix.

rawpy provides enough information from 90% of the files I've tested. Except for the ones that have White Balance provided as 'As Shot White XY'.

In the end it means that I'm not able to 'camera-balance' the files myself, since I only get access to daylight_whitebalance and color_matrix which can only get me to D65.

If you need a test-file, please let me know, I'll ask for permission to share it.

Thank you very much in advance. If you need any additional information please let me know.