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Diffstat (limited to 'include/media/v4l2-event.h')
| -rw-r--r-- | include/media/v4l2-event.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h new file mode 100644 index 000000000000..3b86177c8cd2 --- /dev/null +++ b/include/media/v4l2-event.h @@ -0,0 +1,67 @@ +/* + * 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 */ |