diff options
Diffstat (limited to 'include/media/v4l2-ctrls.h')
| -rw-r--r-- | include/media/v4l2-ctrls.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h index 6890f5e11ad0..801adb466bd2 100644 --- a/include/media/v4l2-ctrls.h +++ b/include/media/v4l2-ctrls.h @@ -384,14 +384,28 @@ struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl, * @hdl: The control handler. * @add: The control handler whose controls you want to add to * the @hdl control handler. + * @filter: This function will filter which controls should be added. * - * Does nothing if either of the two is a NULL pointer. + * Does nothing if either of the two handlers is a NULL pointer. + * If @filter is NULL, then all controls are added. Otherwise only those + * controls for which @filter returns true will be added. * In case of an error @hdl->error will be set to the error code (if it * wasn't set already). */ int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl, - struct v4l2_ctrl_handler *add); + struct v4l2_ctrl_handler *add, + bool (*filter)(const struct v4l2_ctrl *ctrl)); +/** v4l2_ctrl_radio_filter() - Standard filter for radio controls. + * @ctrl: The control that is filtered. + * + * This will return true for any controls that are valid for radio device + * nodes. Those are all of the V4L2_CID_AUDIO_* user controls and all FM + * transmitter class controls. + * + * This function is to be used with v4l2_ctrl_add_handler(). + */ +bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl); /** v4l2_ctrl_cluster() - Mark all controls in the cluster as belonging to that cluster. * @ncontrols: The number of controls in this cluster. |