Auto-Whitebalance Code

Well, there is some auto-whitebalance-adjusting code in the CVS codebase now, which is derived from the auto whitebalance code found in the ultracam module from the usb-video project. Unfortunately, due to the severe limitations of my camera, I am not sure if it works well or not. It doesn't for me -- YMMV...

If anyone knows of a good algorithm for adjusting whitebalance (or brightness, for that matter...or any video component.. :), please let me know! Thanks!