mirror of https://gitee.com/openkylin/linux.git
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
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/*
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* v4l2-event.h
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*
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* V4L2 events.
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*
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* Copyright (C) 2009--2010 Nokia Corporation.
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*
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* Contact: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef V4L2_EVENT_H
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#define V4L2_EVENT_H
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#include <linux/types.h>
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#include <linux/videodev2.h>
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#include <linux/wait.h>
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struct v4l2_fh;
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struct video_device;
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struct v4l2_kevent {
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struct list_head list;
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struct v4l2_event event;
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};
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struct v4l2_subscribed_event {
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struct list_head list;
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u32 type;
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};
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struct v4l2_events {
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wait_queue_head_t wait;
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struct list_head subscribed; /* Subscribed events */
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struct list_head free; /* Events ready for use */
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struct list_head available; /* Dequeueable event */
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unsigned int navailable;
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unsigned int nallocated; /* Number of allocated events */
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u32 sequence;
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};
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int v4l2_event_init(struct v4l2_fh *fh);
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int v4l2_event_alloc(struct v4l2_fh *fh, unsigned int n);
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void v4l2_event_free(struct v4l2_fh *fh);
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int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event,
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int nonblocking);
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void v4l2_event_queue(struct video_device *vdev, const struct v4l2_event *ev);
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int v4l2_event_pending(struct v4l2_fh *fh);
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int v4l2_event_subscribe(struct v4l2_fh *fh,
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struct v4l2_event_subscription *sub);
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int v4l2_event_unsubscribe(struct v4l2_fh *fh,
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struct v4l2_event_subscription *sub);
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#endif /* V4L2_EVENT_H */
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