mirror of https://gitee.com/openkylin/linux.git
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*
|
|
* 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;
|
|
};
|
|
|
|
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);
|
|
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 */
|