Libargus api change contrast and brightness


I have been using the libargus api to set saturation gain and exposure but I don’t see a way to change brightness and contrast. The gstreamer command line pipeline provides those options, I think, but all I see for brightness is getting scene lux, and no way to set it. Contrast isn’t anywhere in the api, as far I can see.

Are they or their alternatives available in the Argus API?