PiCamera-based camera provider for Raspberry Pi

[whitelynx]

Added a new camera provider based on PiCamera, for use with CSI-based cameras on the Raspberry Pi. (not for USB cameras)

[tito]

Nothing to say about the PR, thanks for all!

[tito]

Can you also check the documentation part about the requirements needed for the camera on RPI ? (Numpy + picamera)

[ghost]

Seems like numpy is only used to chop off some "bonus" pixels..? Assuming it's not a requirement of PiCamera in the first place, you could maybe avoid it with a "master" texture (at the full/rounded size), and master_texture.get_region(0, 0, cropped_w, cropped_h) for drawing or a Cython snippet?

Related: PR #5210 - seems like it does similar things without external dependencies

[whitelynx]

I do like the fact that #5210 doesn't require numpy... I'd be fine with that one replacing mine, if someone more comfortable with the C/Cython side of things could review it.

In the meantime, I'll look at using your suggestion for cutting out the numpy dep in this one :)

[tito]

meh :/ i didn't knew about #5210, why this was wasn't merged :(