Only store a single line of the full frame. This allows to support a
large enough frame size to remove the Kconfig option, which simplifies
the implementation (fewer checks needed).
Signed-off-by: Josuah Demangeon <me@josuah.net>
Introduce a video_get_format_index() utility to help finding a caps
entry out of a given format. Introduce several utilities to seek and
apply frame intervals.
Signed-off-by: Josuah Demangeon <me@josuah.net>