add support for VIDIOC_G_INPUT and VIDIOC_S_INPUT #57
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This PR adds support for the
VIDIOC_G_INPUT
andVIDIOC_S_INPUT
ioctls. At the very least this will allow users to query the status of their devices in real time sinceVIDIOC_S_INPUT
is one of the few ioctls that return anEBUSY
signal if in use.