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[media] videodev2.h: add struct v4l2_query_ext_ctrl and VIDIOC_QUERY_EXT_CTRL 

Add a new struct and ioctl to extend the amount of information you can
get for a control.

The range is now a s64 type, and array dimensions and element size can be
reported through nr_of_dims/dims/elems/elem_size.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Hans Verkuil 2014-06-10 04:14:50 -03:00 committed by Mauro Carvalho Chehab
parent 7e6a682107
commit 5082c24178
1 changed files with 20 additions and 0 deletions
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20
include/uapi/linux/videodev2.h
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@ -1269,6 +1269,7 @@ struct v4l2_ext_controls {
#define V4L2_CTRL_ID_MASK (0x0fffffff)
#define V4L2_CTRL_ID2CLASS(id) ((id) & 0x0fff0000UL)
#define V4L2_CTRL_DRIVER_PRIV(id) (((id) & 0xffff) >= 0x1000)
#define V4L2_CTRL_MAX_DIMS (4)
enum v4l2_ctrl_type {
V4L2_CTRL_TYPE_INTEGER = 1,
@ -1298,6 +1299,23 @@ struct v4l2_queryctrl {
__u32 reserved[2];
};
/* Used in the VIDIOC_QUERY_EXT_CTRL ioctl for querying extended controls */
struct v4l2_query_ext_ctrl {
__u32 id;
__u32 type;
char name[32];
__s64 minimum;
__s64 maximum;
__u64 step;
__s64 default_value;
__u32 flags;
__u32 elem_size;
__u32 elems;
__u32 nr_of_dims;
__u32 dims[V4L2_CTRL_MAX_DIMS];
__u32 reserved[32];
};
/* Used in the VIDIOC_QUERYMENU ioctl for querying menu items */
struct v4l2_querymenu {
__u32 id;
@ -2011,6 +2029,8 @@ struct v4l2_create_buffers {
Never use these in applications! */
#define VIDIOC_DBG_G_CHIP_INFO _IOWR('V', 102, struct v4l2_dbg_chip_info)
#define VIDIOC_QUERY_EXT_CTRL _IOWR('V', 103, struct v4l2_query_ext_ctrl)
/* Reminder: when adding new ioctls please add support for them to
drivers/media/video/v4l2-compat-ioctl32.c as well! */