On 01/20/2014 01:45 PM, Hans Verkuil wrote:
From: Hans Verkuil<hans.verkuil@xxxxxxxxx>
Complex controls are controls that can be used for compound and array
types. This allows for more complex datastructures to be used with the
^
(missing whitespace)
control framework.
Such controls always have the V4L2_CTRL_FLAG_HIDDEN flag set. Note that
'simple' controls can also set that flag.
The existing V4L2_CTRL_FLAG_NEXT_CTRL flag will only enumerate controls
that do not have the HIDDEN flag, so a new V4L2_CTRL_FLAG_NEXT_HIDDEN flag
is added to enumerate hidden controls. Set both flags to enumerate any
controls (hidden or not).
Complex control types will start at V4L2_CTRL_COMPLEX_TYPES. In addition, any
control that uses the new 'p' field or the existing 'string' field will have
flag V4L2_CTRL_FLAG_IS_PTR set.
While not strictly necessary, adding that flag makes life for applications
a lot simpler. If the flag is not set, then the control value is set
through the value or value64 fields of struct v4l2_ext_control, otherwise
a pointer points to the value.
Signed-off-by: Hans Verkuil<hans.verkuil@xxxxxxxxx>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
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