linux/include/linux/v4l2-subdev.h
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   1/*
   2 * V4L2 subdev userspace API
   3 *
   4 * Copyright (C) 2010 Nokia Corporation
   5 *
   6 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
   7 *           Sakari Ailus <sakari.ailus@iki.fi>
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License version 2 as
  11 * published by the Free Software Foundation.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21 */
  22
  23#ifndef __LINUX_V4L2_SUBDEV_H
  24#define __LINUX_V4L2_SUBDEV_H
  25
  26#include <linux/ioctl.h>
  27#include <linux/types.h>
  28#include <linux/v4l2-common.h>
  29#include <linux/v4l2-mediabus.h>
  30
  31/**
  32 * enum v4l2_subdev_format_whence - Media bus format type
  33 * @V4L2_SUBDEV_FORMAT_TRY: try format, for negotiation only
  34 * @V4L2_SUBDEV_FORMAT_ACTIVE: active format, applied to the device
  35 */
  36enum v4l2_subdev_format_whence {
  37        V4L2_SUBDEV_FORMAT_TRY = 0,
  38        V4L2_SUBDEV_FORMAT_ACTIVE = 1,
  39};
  40
  41/**
  42 * struct v4l2_subdev_format - Pad-level media bus format
  43 * @which: format type (from enum v4l2_subdev_format_whence)
  44 * @pad: pad number, as reported by the media API
  45 * @format: media bus format (format code and frame size)
  46 */
  47struct v4l2_subdev_format {
  48        __u32 which;
  49        __u32 pad;
  50        struct v4l2_mbus_framefmt format;
  51        __u32 reserved[8];
  52};
  53
  54/**
  55 * struct v4l2_subdev_crop - Pad-level crop settings
  56 * @which: format type (from enum v4l2_subdev_format_whence)
  57 * @pad: pad number, as reported by the media API
  58 * @rect: pad crop rectangle boundaries
  59 */
  60struct v4l2_subdev_crop {
  61        __u32 which;
  62        __u32 pad;
  63        struct v4l2_rect rect;
  64        __u32 reserved[8];
  65};
  66
  67/**
  68 * struct v4l2_subdev_mbus_code_enum - Media bus format enumeration
  69 * @pad: pad number, as reported by the media API
  70 * @index: format index during enumeration
  71 * @code: format code (from enum v4l2_mbus_pixelcode)
  72 */
  73struct v4l2_subdev_mbus_code_enum {
  74        __u32 pad;
  75        __u32 index;
  76        __u32 code;
  77        __u32 reserved[9];
  78};
  79
  80/**
  81 * struct v4l2_subdev_frame_size_enum - Media bus format enumeration
  82 * @pad: pad number, as reported by the media API
  83 * @index: format index during enumeration
  84 * @code: format code (from enum v4l2_mbus_pixelcode)
  85 */
  86struct v4l2_subdev_frame_size_enum {
  87        __u32 index;
  88        __u32 pad;
  89        __u32 code;
  90        __u32 min_width;
  91        __u32 max_width;
  92        __u32 min_height;
  93        __u32 max_height;
  94        __u32 reserved[9];
  95};
  96
  97/**
  98 * struct v4l2_subdev_frame_interval - Pad-level frame rate
  99 * @pad: pad number, as reported by the media API
 100 * @interval: frame interval in seconds
 101 */
 102struct v4l2_subdev_frame_interval {
 103        __u32 pad;
 104        struct v4l2_fract interval;
 105        __u32 reserved[9];
 106};
 107
 108/**
 109 * struct v4l2_subdev_frame_interval_enum - Frame interval enumeration
 110 * @pad: pad number, as reported by the media API
 111 * @index: frame interval index during enumeration
 112 * @code: format code (from enum v4l2_mbus_pixelcode)
 113 * @width: frame width in pixels
 114 * @height: frame height in pixels
 115 * @interval: frame interval in seconds
 116 */
 117struct v4l2_subdev_frame_interval_enum {
 118        __u32 index;
 119        __u32 pad;
 120        __u32 code;
 121        __u32 width;
 122        __u32 height;
 123        struct v4l2_fract interval;
 124        __u32 reserved[9];
 125};
 126
 127/**
 128 * struct v4l2_subdev_selection - selection info
 129 *
 130 * @which: either V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY
 131 * @pad: pad number, as reported by the media API
 132 * @target: Selection target, used to choose one of possible rectangles,
 133 *          defined in v4l2-common.h; V4L2_SEL_TGT_* .
 134 * @flags: constraint flags, defined in v4l2-common.h; V4L2_SEL_FLAG_*.
 135 * @r: coordinates of the selection window
 136 * @reserved: for future use, set to zero for now
 137 *
 138 * Hardware may use multiple helper windows to process a video stream.
 139 * The structure is used to exchange this selection areas between
 140 * an application and a driver.
 141 */
 142struct v4l2_subdev_selection {
 143        __u32 which;
 144        __u32 pad;
 145        __u32 target;
 146        __u32 flags;
 147        struct v4l2_rect r;
 148        __u32 reserved[8];
 149};
 150
 151#define VIDIOC_SUBDEV_G_FMT     _IOWR('V',  4, struct v4l2_subdev_format)
 152#define VIDIOC_SUBDEV_S_FMT     _IOWR('V',  5, struct v4l2_subdev_format)
 153#define VIDIOC_SUBDEV_G_FRAME_INTERVAL \
 154                        _IOWR('V', 21, struct v4l2_subdev_frame_interval)
 155#define VIDIOC_SUBDEV_S_FRAME_INTERVAL \
 156                        _IOWR('V', 22, struct v4l2_subdev_frame_interval)
 157#define VIDIOC_SUBDEV_ENUM_MBUS_CODE \
 158                        _IOWR('V',  2, struct v4l2_subdev_mbus_code_enum)
 159#define VIDIOC_SUBDEV_ENUM_FRAME_SIZE \
 160                        _IOWR('V', 74, struct v4l2_subdev_frame_size_enum)
 161#define VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL \
 162                        _IOWR('V', 75, struct v4l2_subdev_frame_interval_enum)
 163#define VIDIOC_SUBDEV_G_CROP    _IOWR('V', 59, struct v4l2_subdev_crop)
 164#define VIDIOC_SUBDEV_S_CROP    _IOWR('V', 60, struct v4l2_subdev_crop)
 165#define VIDIOC_SUBDEV_G_SELECTION \
 166        _IOWR('V', 61, struct v4l2_subdev_selection)
 167#define VIDIOC_SUBDEV_S_SELECTION \
 168        _IOWR('V', 62, struct v4l2_subdev_selection)
 169
 170#endif
 171
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