diff options
Diffstat (limited to 'include/media/v4l2-ctrls.h')
| -rw-r--r-- | include/media/v4l2-ctrls.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h index c4cc041..91125b6 100644 --- a/include/media/v4l2-ctrls.h +++ b/include/media/v4l2-ctrls.h @@ -518,6 +518,26 @@ void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active); */ void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed); +/** v4l2_ctrl_modify_range() - Update the range of a control. + * @ctrl: The control to update. + * @min: The control's minimum value. + * @max: The control's maximum value. + * @step: The control's step value + * @def: The control's default value. + * + * Update the range of a control on the fly. This works for control types + * INTEGER, BOOLEAN, MENU, INTEGER MENU and BITMASK. For menu controls the + * @step value is interpreted as a menu_skip_mask. + * + * An error is returned if one of the range arguments is invalid for this + * control type. + * + * This function assumes that the control handler is not locked and will + * take the lock itself. + */ +int v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl, + s32 min, s32 max, u32 step, s32 def); + /** v4l2_ctrl_lock() - Helper function to lock the handler * associated with the control. * @ctrl: The control to lock. |