[Bug 693666] bayer: Caps for 16-bit Bayer

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=693666

--- Comment #16 from Joshua M. Doe <oss at nvl.army.mil> ---
Looking at V4L, they specify eight Bayer formats [1], one of which is just our
original video/x-bayer, and three of which would correspond to the bggr16le,
etc format. Two formats use compression, A-LAW or DPCM. The remaining two
formats are for 10- and 12-bit packed, which I believe correspond to MIPI
Packed.

I've not had much use of packed formats, and when I do the first thing I
usually do is to unpack it for processing and even storage.

I suppose you could define formats like bggr_p/bggr_sp/bggr_mipi, along with
the bpp field, but these packed formats aren't something I'm very familiar with
so I'd defer to you or someone else.

[1]: https://linuxtv.org/downloads/v4l-dvb-apis/uapi/v4l/pixfmt-rgb.html

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