feature request: high dynamic range on Prosilica backend

[motmot]

Another thing which I'm going to need is the ability to get the full
bit-depth (10? 12 bit?)  images from the camera, rather than 8-bit mono.
It looks as though libcamiface may support variable bit depth but that
the prosilica_gige interface is currently hardwired to 8-bit mono. Am I
right about that? Is this something that it will be simple to fix?

To be consistent with the way it's done for the other backends, you'd create a new mode number that would be, e.g. MONO16 and rather than the Prosilica backend supporting only a single MONO8 mode, you'd select at start time which of the two (MONO8 or MONO16) modes to use. So, you'd have to modify cam_iface_get_num_modes(), cam_iface_get_mode_string(),
and the Prosilica CamContext constructor. With the libdc1394 backend, most of the cameras come up with 10 or 15 modes you can start them in that specify things like a bit depth and dcam 1394 standard size and frame rate (e.g. 640x480x60fps) or custom values.