On 01/20/2014 01:45 PM, Hans Verkuil wrote:
From: Hans Verkuil<hans.verkuil@xxxxxxxxx>
Add a new struct and ioctl to extend the amount of information you can
get for a control.
It gives back a unit string, the range is now a s64 type, and the matrix
and element size can be reported through cols/rows/elem_size.
Signed-off-by: Hans Verkuil<hans.verkuil@xxxxxxxxx>
---
include/uapi/linux/videodev2.h | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 4d7782a..9e5b7d4 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1272,6 +1272,34 @@ 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];
+ char unit[32];
+ union {
+ __s64 val;
+ __u32 reserved[4];
+ } min;
+ union {
+ __s64 val;
+ __u32 reserved[4];
+ } max;
+ union {
+ __u64 val;
+ __u32 reserved[4];
+ } step;
+ union {
+ __s64 val;
+ __u32 reserved[4];
+ } def;
Are these reserved[] arrays of any use ?
+ __u32 flags;
+ __u32 cols, rows;
nit: I would put them on separate lines and use full words.
+ __u32 elem_size;
+ __u32 reserved[17];
+};
+
/* Used in the VIDIOC_QUERYMENU ioctl for querying menu items */
struct v4l2_querymenu {
__u32 id;
@@ -1965,6 +1993,8 @@ 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! */
--
Regards,
Sylwester
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