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Diffstat (limited to 'include/media/v4l2-event.h')
-rw-r--r--include/media/v4l2-event.h24
1 files changed, 17 insertions, 7 deletions
diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h
index 5f14e8895ce2..88fa9a1e0df3 100644
--- a/include/media/v4l2-event.h
+++ b/include/media/v4l2-event.h
@@ -78,6 +78,19 @@ struct v4l2_kevent {
struct v4l2_event event;
};
+/** struct v4l2_subscribed_event_ops - Subscribed event operations.
+ * @add: Optional callback, called when a new listener is added
+ * @del: Optional callback, called when a listener stops listening
+ * @replace: Optional callback that can replace event 'old' with event 'new'.
+ * @merge: Optional callback that can merge event 'old' into event 'new'.
+ */
+struct v4l2_subscribed_event_ops {
+ int (*add)(struct v4l2_subscribed_event *sev);
+ void (*del)(struct v4l2_subscribed_event *sev);
+ void (*replace)(struct v4l2_event *old, const struct v4l2_event *new);
+ void (*merge)(const struct v4l2_event *old, struct v4l2_event *new);
+};
+
/** struct v4l2_subscribed_event - Internal struct representing a subscribed event.
* @list: List node for the v4l2_fh->subscribed list.
* @type: Event type.
@@ -85,8 +98,7 @@ struct v4l2_kevent {
* @flags: Copy of v4l2_event_subscription->flags.
* @fh: Filehandle that subscribed to this event.
* @node: List node that hooks into the object's event list (if there is one).
- * @replace: Optional callback that can replace event 'old' with event 'new'.
- * @merge: Optional callback that can merge event 'old' into event 'new'.
+ * @ops: v4l2_subscribed_event_ops
* @elems: The number of elements in the events array.
* @first: The index of the events containing the oldest available event.
* @in_use: The number of queued events.
@@ -99,10 +111,7 @@ struct v4l2_subscribed_event {
u32 flags;
struct v4l2_fh *fh;
struct list_head node;
- void (*replace)(struct v4l2_event *old,
- const struct v4l2_event *new);
- void (*merge)(const struct v4l2_event *old,
- struct v4l2_event *new);
+ const struct v4l2_subscribed_event_ops *ops;
unsigned elems;
unsigned first;
unsigned in_use;
@@ -115,7 +124,8 @@ void v4l2_event_queue(struct video_device *vdev, const struct v4l2_event *ev);
void v4l2_event_queue_fh(struct v4l2_fh *fh, const struct v4l2_event *ev);
int v4l2_event_pending(struct v4l2_fh *fh);
int v4l2_event_subscribe(struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub, unsigned elems);
+ struct v4l2_event_subscription *sub, unsigned elems,
+ const struct v4l2_subscribed_event_ops *ops);
int v4l2_event_unsubscribe(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
void v4l2_event_unsubscribe_all(struct v4l2_fh *fh);

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