Hi Hans,
On Thu, Aug 22, 2013 at 12:14:16PM +0200, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verk...@cisco.com>
>
> 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 <hans.verk...@cisco.com>
> ---
> 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 | 58
> ++++++++++++++++++++++++++++++++++++
> 4 files changed, 91 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..cdd5c77 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, type)),
> + 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..cf13339 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -1838,6 +1838,58 @@ struct v4l2_create_buffers {
> __u32 reserved[8];
> };
>
> +/* Define to which motion detection region each element belongs.
> + * Each element is a __u8. */
> +#define V4L2_MATRIX_T_MD_REGION (1)
> +/* Define the motion detection threshold for each element.
> + * Each element is a __u16. */
> +#define V4L2_MATRIX_T_MD_THRESHOLD (2)
> +
> +/**
> + * struct v4l2_query_matrix - VIDIOC_QUERY_MATRIX argument
> + * @type: matrix type
> + * @ref: reference to some object (if any) owning the matrix
How about removing the comment, too? :-)
> + * @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
How about "size of each matrix element in bytes"?
> + * @reserved: future extensions, applications and drivers must zero
> this.
> + */
> +struct v4l2_query_matrix {
> + __u32 type;
> + __u32 columns;
> + __u32 rows;
> + union {
> + __s64 val;
> + __u64 uval;
> + __u32 raw[4];
> + } elem_min;
> + union {
> + __s64 val;
> + __u64 uval;
> + __u32 raw[4];
> + } elem_max;
> + __u32 elem_size;
> + __u32 reserved[16];
> +} __attribute__ ((packed));
> +
> +/**
> + * struct v4l2_matrix - VIDIOC_G/S_MATRIX argument
> + * @type: matrix type
> + * @ref: reference to some object (if any) owning the matrix
Same here.
> + * @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;
> + struct v4l2_rect rect;
> + void __user *matrix;
> + __u32 reserved[16];
> +} __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 +1998,12 @@ 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! */
>
With these changes,
Acked-by: Sakari Ailus <sakari.ai...@iki.fi>
--
Cheers,
Sakari Ailus
e-mail: sakari.ai...@iki.fi XMPP: sai...@retiisi.org.uk
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