Hi! > Add support for exponential bases, prefixes as well as units for V4L2 > controls. This makes it possible to convey information on the relation > between the control value and the hardware feature being controlled. > > Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> Sounds good. > +/* V4L2 control exponential bases */ > +#define V4L2_CTRL_BASE_UNDEFINED 0 > +#define V4L2_CTRL_BASE_LINEAR 1 > +#define V4L2_CTRL_BASE_2 2 > +#define V4L2_CTRL_BASE_10 10 Do we also want to support logarithmic and 1/x? For example focus is usually in diopters and thats 1/meter... > +/* V4L2 control units */ > +#define V4L2_CTRL_UNIT_UNDEFINED 0 > +#define V4L2_CTRL_UNIT_NONE 1 > +#define V4L2_CTRL_UNIT_SECOND 2 > +#define V4L2_CTRL_UNIT_AMPERE 3 > +#define V4L2_CTRL_UNIT_LINE 4 > +#define V4L2_CTRL_UNIT_PIXEL 5 > +#define V4L2_CTRL_UNIT_PIXELS_PER_SEC 6 > +#define V4L2_CTRL_UNIT_HZ 7 And Hz is 1/second. Should we also have some support for ISO-sensitivity and f/ aperture numbers? Thanks, Pavel
