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[REVIEW,05/32] videodev2.h: add struct v4l2_query_ext_ctrl and VIDIOC_QUERY_EXT_CTRL.

Message ID 1391162190-8620-6-git-send-email-hverkuil@xs4all.nl (mailing list archive)
State New, archived
Headers show

Commit Message

Hans Verkuil Jan. 31, 2014, 9:56 a.m. UTC 
From: Hans Verkuil <hans.verkuil@cisco.com>

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@cisco.com>
---
 include/uapi/linux/videodev2.h | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
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Patch

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 4d7782a..858a6f3 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1272,6 +1272,35 @@  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;
+	__u32                flags;
+	__u32                cols;
+	__u32                rows;
+	__u32                elem_size;
+	__u32		     reserved[17];
+};
+
 /*  Used in the VIDIOC_QUERYMENU ioctl for querying menu items */
 struct v4l2_querymenu {
 	__u32		id;
@@ -1965,6 +1994,8 @@  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! */