Gecko [ paroquia-rio-de-mouro.pt ]

Name	Size	Permission	Date
blackfin	[ DIR ]	drwxr-xr-x	2021-04-21 07:33
davinci	[ DIR ]	drwxr-xr-x	2021-04-21 07:33
ad9389b.h	1.41 KB	-rw-r--r--	2016-01-11 00:01
adp1653.h	4.21 KB	-rw-r--r--	2016-01-11 00:01
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as3645a.h	2.35 KB	-rw-r--r--	2016-01-11 00:01
bt819.h	1.15 KB	-rw-r--r--	2016-01-11 00:01
cs5345.h	1.18 KB	-rw-r--r--	2016-01-11 00:01
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cx25840.h	5.38 KB	-rw-r--r--	2016-01-11 00:01
exynos-fimc.h	4.75 KB	-rw-r--r--	2016-01-11 00:01
gpio-ir-recv.h	733 B	-rw-r--r--	2016-01-11 00:01
i2c-addr.h	1.18 KB	-rw-r--r--	2016-01-11 00:01
ir-kbd-i2c.h	1.29 KB	-rw-r--r--	2016-01-11 00:01
ir-rx51.h	163 B	-rw-r--r--	2016-01-11 00:01
lirc.h	6.27 KB	-rw-r--r--	2016-01-11 00:01
lirc_dev.h	6.57 KB	-rw-r--r--	2016-01-11 00:01
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media-devnode.h	3.88 KB	-rw-r--r--	2021-04-16 11:57
media-entity.h	5.46 KB	-rw-r--r--	2016-01-11 00:01
mmp-camera.h	179 B	-rw-r--r--	2016-01-11 00:01
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noon010pc30.h	727 B	-rw-r--r--	2016-01-11 00:01
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omap4iss.h	1.42 KB	-rw-r--r--	2016-01-11 00:01
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rc-core.h	9.15 KB	-rw-r--r--	2016-01-11 00:01
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s3c_camif.h	1.29 KB	-rw-r--r--	2016-01-11 00:01
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saa7146_vv.h	7.48 KB	-rw-r--r--	2016-01-11 00:01
sh_mobile_ceu.h	866 B	-rw-r--r--	2016-01-11 00:01
sh_mobile_csi2.h	986 B	-rw-r--r--	2016-01-11 00:01
sh_vou.h	716 B	-rw-r--r--	2016-01-11 00:01
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smiapp.h	2.45 KB	-rw-r--r--	2016-01-11 00:01
soc_camera.h	13.57 KB	-rw-r--r--	2016-01-11 00:01
soc_camera_platform.h	1.93 KB	-rw-r--r--	2016-01-11 00:01
soc_mediabus.h	3.5 KB	-rw-r--r--	2016-01-11 00:01
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timb_radio.h	994 B	-rw-r--r--	2016-01-11 00:01
timb_video.h	1.01 KB	-rw-r--r--	2016-01-11 00:01
tuner-types.h	6.93 KB	-rw-r--r--	2016-01-11 00:01
tuner.h	8.82 KB	-rw-r--r--	2016-01-11 00:01
tvaudio.h	1.39 KB	-rw-r--r--	2016-01-11 00:01
tveeprom.h	3.27 KB	-rw-r--r--	2016-01-11 00:01
tvp514x.h	2.76 KB	-rw-r--r--	2016-01-11 00:01
tvp5150.h	1.04 KB	-rw-r--r--	2016-01-11 00:01
tvp7002.h	2.07 KB	-rw-r--r--	2016-01-11 00:01
tw9910.h	784 B	-rw-r--r--	2016-01-11 00:01
uda1342.h	960 B	-rw-r--r--	2016-01-11 00:01
upd64031a.h	1.32 KB	-rw-r--r--	2016-01-11 00:01
upd64083.h	2.23 KB	-rw-r--r--	2016-01-11 00:01
v4l2-async.h	2.8 KB	-rw-r--r--	2016-01-11 00:01
v4l2-clk.h	1.98 KB	-rw-r--r--	2016-01-11 00:01
v4l2-common.h	6.41 KB	-rw-r--r--	2016-01-11 00:01
v4l2-ctrls.h	33.24 KB	-rw-r--r--	2016-01-11 00:01
v4l2-dev.h	7.29 KB	-rw-r--r--	2016-01-11 00:01
v4l2-device.h	7.57 KB	-rw-r--r--	2016-01-11 00:01
v4l2-dv-timings.h	7.07 KB	-rw-r--r--	2016-01-11 00:01
v4l2-event.h	5.22 KB	-rw-r--r--	2016-01-11 00:01
v4l2-fh.h	3.39 KB	-rw-r--r--	2021-04-16 11:57
v4l2-flash-led-class.h	4.56 KB	-rw-r--r--	2016-01-11 00:01
v4l2-image-sizes.h	864 B	-rw-r--r--	2016-01-11 00:01
v4l2-ioctl.h	13.58 KB	-rw-r--r--	2016-01-11 00:01
v4l2-mediabus.h	3.94 KB	-rw-r--r--	2016-01-11 00:01
v4l2-mem2mem.h	8.56 KB	-rw-r--r--	2016-01-11 00:01
v4l2-of.h	3.52 KB	-rw-r--r--	2016-01-11 00:01
v4l2-subdev.h	31.48 KB	-rw-r--r--	2016-01-11 00:01
videobuf-core.h	6.99 KB	-rw-r--r--	2016-01-11 00:01
videobuf-dma-contig.h	1.04 KB	-rw-r--r--	2016-01-11 00:01
videobuf-dma-sg.h	2.94 KB	-rw-r--r--	2016-01-11 00:01
videobuf-dvb.h	1.67 KB	-rw-r--r--	2016-01-11 00:01
videobuf-vmalloc.h	1.29 KB	-rw-r--r--	2016-01-11 00:01
videobuf2-core.h	23.61 KB	-rw-r--r--	2021-04-16 11:57
videobuf2-dma-contig.h	831 B	-rw-r--r--	2016-01-11 00:01
videobuf2-dma-sg.h	790 B	-rw-r--r--	2016-01-11 00:01
videobuf2-dvb.h	1.64 KB	-rw-r--r--	2016-01-11 00:01
videobuf2-memops.h	1.06 KB	-rw-r--r--	2016-01-11 00:01
videobuf2-v4l2.h	5.27 KB	-rw-r--r--	2016-01-11 00:01
videobuf2-vmalloc.h	509 B	-rw-r--r--	2016-01-11 00:01
wm8775.h	1.36 KB	-rw-r--r--	2016-01-11 00:01

Rename

/*
 * v4l2-event.h
 *
 * V4L2 events.
 *
 * Copyright (C) 2009--2010 Nokia Corporation.
 *
 * Contact: Sakari Ailus <sakari.ailus@iki.fi>
 *
 * 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>

/*
 * Overview:
 *
 * Events are subscribed per-filehandle. An event specification consists of a
 * type and is optionally associated with an object identified through the
 * 'id' field. So an event is uniquely identified by the (type, id) tuple.
 *
 * The v4l2-fh struct has a list of subscribed events. The v4l2_subscribed_event
 * struct is added to that list, one for every subscribed event.
 *
 * Each v4l2_subscribed_event struct ends with an array of v4l2_kevent structs.
 * This array (ringbuffer, really) is used to store any events raised by the
 * driver. The v4l2_kevent struct links into the 'available' list of the
 * v4l2_fh struct so VIDIOC_DQEVENT will know which event to dequeue first.
 *
 * Finally, if the event subscription is associated with a particular object
 * such as a V4L2 control, then that object needs to know about that as well
 * so that an event can be raised by that object. So the 'node' field can
 * be used to link the v4l2_subscribed_event struct into a list of that
 * object.
 *
 * So to summarize:
 *
 * struct v4l2_fh has two lists: one of the subscribed events, and one of the
 * pending events.
 *
 * struct v4l2_subscribed_event has a ringbuffer of raised (pending) events of
 * that particular type.
 *
 * If struct v4l2_subscribed_event is associated with a specific object, then
 * that object will have an internal list of struct v4l2_subscribed_event so
 * it knows who subscribed an event to that object.
 */

struct v4l2_fh;
struct v4l2_subdev;
struct v4l2_subscribed_event;
struct video_device;

/**
 * struct v4l2_kevent - Internal kernel event struct.
 * @list:	List node for the v4l2_fh->available list.
 * @sev:	Pointer to parent v4l2_subscribed_event.
 * @event:	The event itself.
  */
struct v4l2_kevent {
	struct list_head	list;
	struct v4l2_subscribed_event *sev;
	struct v4l2_event	event;
};

/** struct v4l2_subscribed_event_ops - Subscribed event operations.
 *
 * @add:	Optional callback, called when a new listener is added
 * @del:	Optional callback, called when a listener stops listening
 * @replace:	Optional callback that can replace event 'old' with event 'new'.
 * @merge:	Optional callback that can merge event 'old' into event 'new'.
 */
struct v4l2_subscribed_event_ops {
	int  (*add)(struct v4l2_subscribed_event *sev, unsigned elems);
	void (*del)(struct v4l2_subscribed_event *sev);
	void (*replace)(struct v4l2_event *old, const struct v4l2_event *new);
	void (*merge)(const struct v4l2_event *old, struct v4l2_event *new);
};

/**
 * struct v4l2_subscribed_event - Internal struct representing a subscribed event.
 * @list:	List node for the v4l2_fh->subscribed list.
 * @type:	Event type.
 * @id:	Associated object ID (e.g. control ID). 0 if there isn't any.
 * @flags:	Copy of v4l2_event_subscription->flags.
 * @fh:	Filehandle that subscribed to this event.
 * @node:	List node that hooks into the object's event list (if there is one).
 * @ops:	v4l2_subscribed_event_ops
 * @elems:	The number of elements in the events array.
 * @first:	The index of the events containing the oldest available event.
 * @in_use:	The number of queued events.
 * @events:	An array of @elems events.
 */
struct v4l2_subscribed_event {
	struct list_head	list;
	u32			type;
	u32			id;
	u32			flags;
	struct v4l2_fh		*fh;
	struct list_head	node;
	const struct v4l2_subscribed_event_ops *ops;
	unsigned		elems;
	unsigned		first;
	unsigned		in_use;
	struct v4l2_kevent	events[];
};

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,
			 const struct v4l2_event_subscription *sub, unsigned elems,
			 const struct v4l2_subscribed_event_ops *ops);
int v4l2_event_unsubscribe(struct v4l2_fh *fh,
			   const struct v4l2_event_subscription *sub);
void v4l2_event_unsubscribe_all(struct v4l2_fh *fh);
int v4l2_event_subdev_unsubscribe(struct v4l2_subdev *sd, struct v4l2_fh *fh,
				  struct v4l2_event_subscription *sub);
int v4l2_src_change_event_subscribe(struct v4l2_fh *fh,
				const struct v4l2_event_subscription *sub);
int v4l2_src_change_event_subdev_subscribe(struct v4l2_subdev *sd,
		struct v4l2_fh *fh, struct v4l2_event_subscription *sub);
#endif /* V4L2_EVENT_H */