| Sakari Ailus | c3b5b02 | 2010-03-01 05:14:18 -0300 | [diff] [blame] | 1 | /* |
| 2 | * v4l2-event.h |
| 3 | * |
| 4 | * V4L2 events. |
| 5 | * |
| 6 | * Copyright (C) 2009--2010 Nokia Corporation. |
| 7 | * |
| 8 | * Contact: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * version 2 as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 22 | * 02110-1301 USA |
| 23 | */ |
| 24 | |
| 25 | #ifndef V4L2_EVENT_H |
| 26 | #define V4L2_EVENT_H |
| 27 | |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/videodev2.h> |
| 30 | #include <linux/wait.h> |
| 31 | |
| 32 | struct v4l2_fh; |
| 33 | struct video_device; |
| 34 | |
| 35 | struct v4l2_kevent { |
| 36 | struct list_head list; |
| 37 | struct v4l2_event event; |
| 38 | }; |
| 39 | |
| 40 | struct v4l2_subscribed_event { |
| 41 | struct list_head list; |
| 42 | u32 type; |
| 43 | }; |
| 44 | |
| 45 | struct v4l2_events { |
| 46 | wait_queue_head_t wait; |
| 47 | struct list_head subscribed; /* Subscribed events */ |
| 48 | struct list_head free; /* Events ready for use */ |
| 49 | struct list_head available; /* Dequeueable event */ |
| 50 | unsigned int navailable; |
| 51 | unsigned int nallocated; /* Number of allocated events */ |
| 52 | u32 sequence; |
| 53 | }; |
| 54 | |
| 55 | int v4l2_event_init(struct v4l2_fh *fh); |
| 56 | int v4l2_event_alloc(struct v4l2_fh *fh, unsigned int n); |
| 57 | void v4l2_event_free(struct v4l2_fh *fh); |
| 58 | int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event, |
| 59 | int nonblocking); |
| 60 | void v4l2_event_queue(struct video_device *vdev, const struct v4l2_event *ev); |
| 61 | int v4l2_event_pending(struct v4l2_fh *fh); |
| 62 | int v4l2_event_subscribe(struct v4l2_fh *fh, |
| 63 | struct v4l2_event_subscription *sub); |
| 64 | int v4l2_event_unsubscribe(struct v4l2_fh *fh, |
| 65 | struct v4l2_event_subscription *sub); |
| 66 | |
| 67 | #endif /* V4L2_EVENT_H */ |