[media] v4l2-event: add optional merge and replace callbacks

[cascardo/linux.git] / include / media / v4l2-event.h

diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h
index 8d681e5..6da793f 100644 (file)
--- a/include/media/v4l2-event.h
+++ b/include/media/v4l2-event.h
@@ -55,6 +55,12 @@ struct v4l2_subscribed_event {
        struct v4l2_fh          *fh;
        /* list node that hooks into the object's event list (if there is one) */
        struct list_head        node;
+       /* Optional callback that can replace event 'old' with event 'new'. */
+       void                    (*replace)(struct v4l2_event *old,
+                                          const struct v4l2_event *new);
+       /* Optional callback that can merge event 'old' into event 'new'. */
+       void                    (*merge)(const struct v4l2_event *old,
+                                        struct v4l2_event *new);
        /* the number of elements in the events array */
        unsigned                elems;
        /* the index of the events containing the oldest available event */