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Commit 5082c241 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

[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: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 7e6a6821

include/uapi/linux/videodev2.h

+20 −0
Original line number Original line Diff line number Diff line
@@ -1269,6 +1269,7 @@ struct v4l2_ext_controls { 
#define V4L2_CTRL_ID_MASK      	  (0x0fffffff)

#define V4L2_CTRL_ID_MASK      	  (0x0fffffff)

#define V4L2_CTRL_ID2CLASS(id)    ((id) & 0x0fff0000UL)

#define V4L2_CTRL_ID2CLASS(id)    ((id) & 0x0fff0000UL)

#define V4L2_CTRL_DRIVER_PRIV(id) (((id) & 0xffff) >= 0x1000)

#define V4L2_CTRL_DRIVER_PRIV(id) (((id) & 0xffff) >= 0x1000)

#define V4L2_CTRL_MAX_DIMS	  (4)





enum v4l2_ctrl_type {

enum v4l2_ctrl_type {

	V4L2_CTRL_TYPE_INTEGER	     = 1,

	V4L2_CTRL_TYPE_INTEGER	     = 1,
@@ -1298,6 +1299,23 @@ struct v4l2_queryctrl { 
	__u32		     reserved[2];

	__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 */

/*  Used in the VIDIOC_QUERYMENU ioctl for querying menu items */

struct v4l2_querymenu {

struct v4l2_querymenu {

	__u32		id;

	__u32		id;
@@ -2011,6 +2029,8 @@ struct v4l2_create_buffers { 
   Never use these in applications! */

   Never use these in applications! */

#define VIDIOC_DBG_G_CHIP_INFO  _IOWR('V', 102, struct v4l2_dbg_chip_info)

#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

/* Reminder: when adding new ioctls please add support for them to

   drivers/media/video/v4l2-compat-ioctl32.c as well! */

   drivers/media/video/v4l2-compat-ioctl32.c as well! */