| /* |
| * v4l2-event.h |
| * |
| * V4L2 events. |
| * |
| * Copyright (C) 2009--2010 Nokia Corporation. |
| * |
| * Contact: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| * 02110-1301 USA |
| */ |
| |
| #ifndef V4L2_EVENT_H |
| #define V4L2_EVENT_H |
| |
| #include <linux/types.h> |
| #include <linux/videodev2.h> |
| #include <linux/wait.h> |
| |
| struct v4l2_fh; |
| struct video_device; |
| |
| struct v4l2_kevent { |
| struct list_head list; |
| struct v4l2_event event; |
| }; |
| |
| struct v4l2_subscribed_event { |
| struct list_head list; |
| u32 type; |
| u32 id; |
| }; |
| |
| struct v4l2_events { |
| wait_queue_head_t wait; |
| struct list_head subscribed; /* Subscribed events */ |
| struct list_head free; /* Events ready for use */ |
| struct list_head available; /* Dequeueable event */ |
| unsigned int navailable; |
| unsigned int nallocated; /* Number of allocated events */ |
| u32 sequence; |
| }; |
| |
| int v4l2_event_init(struct v4l2_fh *fh); |
| int v4l2_event_alloc(struct v4l2_fh *fh, unsigned int n); |
| void v4l2_event_free(struct v4l2_fh *fh); |
| int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event, |
| int nonblocking); |
| 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); |
| int v4l2_event_unsubscribe(struct v4l2_fh *fh, |
| struct v4l2_event_subscription *sub); |
| |
| #endif /* V4L2_EVENT_H */ |