晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/include/linux/xilinx-v4l2-controls.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Xilinx Controls Header
 *
 * Copyright (C) 2013-2015 Ideas on Board
 * Copyright (C) 2013-2015 Xilinx, Inc.
 *
 * Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
 *           Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 */

#ifndef __UAPI_XILINX_V4L2_CONTROLS_H__
#define __UAPI_XILINX_V4L2_CONTROLS_H__

#include <linux/v4l2-controls.h>

#define V4L2_CID_XILINX_OFFSET	0xc000
#define V4L2_CID_XILINX_BASE	(V4L2_CID_USER_BASE + V4L2_CID_XILINX_OFFSET)

/*
 * Private Controls for Xilinx Video IPs
 */

/*
 * Xilinx TPG Video IP
 */

#define V4L2_CID_XILINX_TPG			(V4L2_CID_USER_BASE + 0xc000)

/* Draw cross hairs */
#define V4L2_CID_XILINX_TPG_CROSS_HAIRS		(V4L2_CID_XILINX_TPG + 1)
/* Enable a moving box */
#define V4L2_CID_XILINX_TPG_MOVING_BOX		(V4L2_CID_XILINX_TPG + 2)
/* Mask out a color component */
#define V4L2_CID_XILINX_TPG_COLOR_MASK		(V4L2_CID_XILINX_TPG + 3)
/* Enable a stuck pixel feature */
#define V4L2_CID_XILINX_TPG_STUCK_PIXEL		(V4L2_CID_XILINX_TPG + 4)
/* Enable a noisy output */
#define V4L2_CID_XILINX_TPG_NOISE		(V4L2_CID_XILINX_TPG + 5)
/* Enable the motion feature */
#define V4L2_CID_XILINX_TPG_MOTION		(V4L2_CID_XILINX_TPG + 6)
/* Configure the motion speed of moving patterns */
#define V4L2_CID_XILINX_TPG_MOTION_SPEED	(V4L2_CID_XILINX_TPG + 7)
/* The row of horizontal cross hair location */
#define V4L2_CID_XILINX_TPG_CROSS_HAIR_ROW	(V4L2_CID_XILINX_TPG + 8)
/* The colum of vertical cross hair location */
#define V4L2_CID_XILINX_TPG_CROSS_HAIR_COLUMN	(V4L2_CID_XILINX_TPG + 9)
/* Set starting point of sine wave for horizontal component */
#define V4L2_CID_XILINX_TPG_ZPLATE_HOR_START	(V4L2_CID_XILINX_TPG + 10)
/* Set speed of the horizontal component */
#define V4L2_CID_XILINX_TPG_ZPLATE_HOR_SPEED	(V4L2_CID_XILINX_TPG + 11)
/* Set starting point of sine wave for vertical component */
#define V4L2_CID_XILINX_TPG_ZPLATE_VER_START	(V4L2_CID_XILINX_TPG + 12)
/* Set speed of the vertical component */
#define V4L2_CID_XILINX_TPG_ZPLATE_VER_SPEED	(V4L2_CID_XILINX_TPG + 13)
/* Moving box size */
#define V4L2_CID_XILINX_TPG_BOX_SIZE		(V4L2_CID_XILINX_TPG + 14)
/* Moving box color */
#define V4L2_CID_XILINX_TPG_BOX_COLOR		(V4L2_CID_XILINX_TPG + 15)
/* Upper limit count of generated stuck pixels */
#define V4L2_CID_XILINX_TPG_STUCK_PIXEL_THRESH	(V4L2_CID_XILINX_TPG + 16)
/* Noise level */
#define V4L2_CID_XILINX_TPG_NOISE_GAIN		(V4L2_CID_XILINX_TPG + 17)

#endif /* __UAPI_XILINX_V4L2_CONTROLS_H__ */

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