From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
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@xxxxxxxxx>
---
include/uapi/linux/videodev2.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 438c4a6..7d94adc 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -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 (8)
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[16];
+};
+
/* 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! */
--
2.0.0.rc0
--
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