Hi Hans,
Thanks for the patchset!
On Fri, Jun 28, 2013 at 02:27:30PM +0200, Hans Verkuil wrote:
From: Hans Verkuil <[email protected]>
This patch adds core support for matrices: querying, getting and setting.
Two initial matrix types are defined for motion detection (defining regions
and thresholds).
Signed-off-by: Hans Verkuil <[email protected]>
---
drivers/media/v4l2-core/v4l2-dev.c | 3 ++
drivers/media/v4l2-core/v4l2-ioctl.c | 23 ++++++++++++-
include/media/v4l2-ioctl.h | 8 +++++
include/uapi/linux/videodev2.h | 64 ++++++++++++++++++++++++++++++++++++
4 files changed, 97 insertions(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/v4l2-dev.c
b/drivers/media/v4l2-core/v4l2-dev.c
index c8859d6..5e58df6 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -598,6 +598,9 @@ static void determine_valid_ioctls(struct video_device
*vdev)
SET_VALID_IOCTL(ops, VIDIOC_UNSUBSCRIBE_EVENT,
vidioc_unsubscribe_event);
if (ops->vidioc_enum_freq_bands || ops->vidioc_g_tuner ||
ops->vidioc_g_modulator)
set_bit(_IOC_NR(VIDIOC_ENUM_FREQ_BANDS), valid_ioctls);
+ SET_VALID_IOCTL(ops, VIDIOC_QUERY_MATRIX, vidioc_query_matrix);
+ SET_VALID_IOCTL(ops, VIDIOC_G_MATRIX, vidioc_g_matrix);
+ SET_VALID_IOCTL(ops, VIDIOC_S_MATRIX, vidioc_s_matrix);
if (is_vid) {
/* video specific ioctls */
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c
b/drivers/media/v4l2-core/v4l2-ioctl.c
index 68e6b5e..47debfc 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -549,7 +549,7 @@ static void v4l_print_cropcap(const void *arg, bool
write_only)
const struct v4l2_cropcap *p = arg;
pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
- "defrect wxh=%dx%d, x,y=%d,%d\n, "
+ "defrect wxh=%dx%d, x,y=%d,%d, "
"pixelaspect %d/%d\n",
prt_names(p->type, v4l2_type_names),
p->bounds.width, p->bounds.height,
@@ -831,6 +831,24 @@ static void v4l_print_freq_band(const void *arg, bool
write_only)
p->rangehigh, p->modulation);
}
+static void v4l_print_query_matrix(const void *arg, bool write_only)
+{
+ const struct v4l2_query_matrix *p = arg;
+
+ pr_cont("type=0x%x, columns=%u, rows=%u, elem_min=%lld, elem_max=%lld,
elem_size=%u\n",
+ p->type, p->columns, p->rows,
+ p->elem_min.val, p->elem_max.val, p->elem_size);
+}
+
+static void v4l_print_matrix(const void *arg, bool write_only)
+{
+ const struct v4l2_matrix *p = arg;
+
+ pr_cont("type=0x%x, wxh=%dx%d, x,y=%d,%d, matrix=%p\n",
+ p->type, p->rect.width, p->rect.height,
+ p->rect.top, p->rect.left, p->matrix);
+}
+
static void v4l_print_u32(const void *arg, bool write_only)
{
pr_cont("value=%u\n", *(const u32 *)arg);
@@ -2055,6 +2073,9 @@ static struct v4l2_ioctl_info v4l2_ioctls[] = {
IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap,
v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands,
v4l_print_freq_band, 0),
IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info,
v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
+ IOCTL_INFO_STD(VIDIOC_QUERY_MATRIX, vidioc_query_matrix,
v4l_print_query_matrix, INFO_FL_CLEAR(v4l2_query_matrix, ref)),
+ IOCTL_INFO_STD(VIDIOC_G_MATRIX, vidioc_g_matrix, v4l_print_matrix,
INFO_FL_CLEAR(v4l2_matrix, matrix)),
+ IOCTL_INFO_STD(VIDIOC_S_MATRIX, vidioc_s_matrix, v4l_print_matrix,
INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_matrix, matrix)),
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
diff --git a/include/media/v4l2-ioctl.h b/include/media/v4l2-ioctl.h
index e0b74a4..7e4538e 100644
--- a/include/media/v4l2-ioctl.h
+++ b/include/media/v4l2-ioctl.h
@@ -271,6 +271,14 @@ struct v4l2_ioctl_ops {
int (*vidioc_unsubscribe_event)(struct v4l2_fh *fh,
const struct v4l2_event_subscription
*sub);
+ /* Matrix ioctls */
+ int (*vidioc_query_matrix) (struct file *file, void *fh,
+ struct v4l2_query_matrix *qmatrix);
+ int (*vidioc_g_matrix) (struct file *file, void *fh,
+ struct v4l2_matrix *matrix);
+ int (*vidioc_s_matrix) (struct file *file, void *fh,
+ struct v4l2_matrix *matrix);
+
/* For other private ioctls */
long (*vidioc_default) (struct file *file, void *fh,
bool valid_prio, unsigned int cmd, void
*arg);
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 95ef455..5cbe815 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1838,6 +1838,64 @@ struct v4l2_create_buffers {
__u32 reserved[8];
};
+/* Define to which motion detection region each element belongs.
+ * Each element is a __u8. */
+#define V4L2_MATRIX_TYPE_MD_REGION (1)
+/* Define the motion detection threshold for each element.
+ * Each element is a __u16. */
+#define V4L2_MATRIX_TYPE_MD_THRESHOLD (2)
How about V4L2_MATRIX_T_... instead? These are bound to be quite long.
+
+/**
+ * struct v4l2_query_matrix - VIDIOC_QUERY_MATRIX argument
+ * @type: matrix type
+ * @ref: reference to some object (if any) owning the matrix
+ * @columns: number of columns in the matrix
+ * @rows: number of rows in the matrix
+ * @elem_min: minimum matrix element value
+ * @elem_max: maximum matrix element value
+ * @elem_size: size in bytes each matrix element
+ * @reserved: future extensions, applications and drivers must zero this.
+ */
+struct v4l2_query_matrix {
+ __u32 type;
+ union {
+ __u32 reserved[4];
+ } ref;
+ __u32 columns;
+ __u32 rows;
You're assuming two-dimensional matrices. How about array dim[3 or 4]
and ndim instead of columns and rows?
+ union {
+ __s64 val;
+ __u64 uval;
+ __u32 reserved[4];
How about "raw" as in e.g. v4l2_format? Reserved suggests to me the
field is unused, which is not the case.
+ } elem_min;
+ union {
+ __s64 val;
+ __u64 uval;
+ __u32 reserved[4];
+ } elem_max;
+ __u32 elem_size;
+ __u32 reserved[12];
+} __attribute__ ((packed));
+
+/**
+ * struct v4l2_matrix - VIDIOC_G/S_MATRIX argument
+ * @type: matrix type
+ * @ref: reference to some object (if any) owning the matrix
+ * @rect: which part of the matrix to get/set
+ * @matrix: pointer to the matrix of size (in bytes):
+ * elem_size * rect.width * rect.height
+ * @reserved: future extensions, applications and drivers must zero this.
+ */
+struct v4l2_matrix {
+ __u32 type;
+ union {
+ __u32 reserved[4];
+ } ref;
+ struct v4l2_rect rect;
+ void __user *matrix;
This is an interesting idea. Do you have use cases in mind for this?
+ __u32 reserved[12];
+} __attribute__ ((packed));
+
/*
* I O C T L C O D E S F O R V I D E O D E V I C E S
*
@@ -1946,6 +2004,12 @@ struct v4l2_create_buffers {
Never use these in applications! */
#define VIDIOC_DBG_G_CHIP_INFO _IOWR('V', 102, struct v4l2_dbg_chip_info)
+/* Experimental, these three ioctls may change over the next couple of kernel
+ versions. */
+#define VIDIOC_QUERY_MATRIX _IOWR('V', 103, struct v4l2_query_matrix)
+#define VIDIOC_G_MATRIX _IOWR('V', 104, struct v4l2_matrix)
+#define VIDIOC_S_MATRIX _IOWR('V', 105, struct v4l2_matrix)
+
/* Reminder: when adding new ioctls please add support for them to
drivers/media/video/v4l2-compat-ioctl32.c as well! */
--
Kind regards,
Sakari Ailus
e-mail: [email protected] XMPP: [email protected]
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