This patch introduces new api for a precise control of cropping and composing
features for video devices. The new ioctls are VIDIOC_S_SELECTION and
VIDIOC_G_SELECTION.
Signed-off-by: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/media/video/v4l2-compat-ioctl32.c | 2 ++
drivers/media/video/v4l2-ioctl.c | 28 ++++++++++++++++++++++++++++
include/linux/videodev2.h | 27 +++++++++++++++++++++++++++
include/media/v4l2-ioctl.h | 4 ++++
4 files changed, 61 insertions(+), 0 deletions(-)
diff --git a/drivers/media/video/v4l2-compat-ioctl32.c b/drivers/media/video/v4l2-compat-ioctl32.c
index 61979b7..f3b9d15 100644
--- a/drivers/media/video/v4l2-compat-ioctl32.c
+++ b/drivers/media/video/v4l2-compat-ioctl32.c
@@ -927,6 +927,8 @@ long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
case VIDIOC_CROPCAP:
case VIDIOC_G_CROP:
case VIDIOC_S_CROP:
+ case VIDIOC_G_SELECTION:
+ case VIDIOC_S_SELECTION:
case VIDIOC_G_JPEGCOMP:
case VIDIOC_S_JPEGCOMP:
case VIDIOC_QUERYSTD:
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index 002ce13..6e02b45 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -225,6 +225,8 @@ static const char *v4l2_ioctls[] = {
[_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
[_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
[_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
+ [_IOC_NR(VIDIOC_G_SELECTION)] = "VIDIOC_G_SELECTION",
+ [_IOC_NR(VIDIOC_S_SELECTION)] = "VIDIOC_S_SELECTION",
[_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
[_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
[_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
@@ -1714,6 +1716,32 @@ static long __video_do_ioctl(struct file *file,
ret = ops->vidioc_s_crop(file, fh, p);
break;
}
+ case VIDIOC_G_SELECTION:
+ {
+ struct v4l2_selection *p = arg;
+
+ if (!ops->vidioc_g_selection)
+ break;
+
+ dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
+
+ ret = ops->vidioc_g_selection(file, fh, p);
+ if (!ret)
+ dbgrect(vfd, "", &p->r);
+ break;
+ }
+ case VIDIOC_S_SELECTION:
+ {
+ struct v4l2_selection *p = arg;
+
+ if (!ops->vidioc_s_selection)
+ break;
+ dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
+ dbgrect(vfd, "", &p->r);
+
+ ret = ops->vidioc_s_selection(file, fh, p);
+ break;
+ }
case VIDIOC_CROPCAP:
{
struct v4l2_cropcap *p = arg;
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index fca24cc..fad4fb3 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -738,6 +738,29 @@ struct v4l2_crop {
struct v4l2_rect c;
};
+/* Hints for adjustments of selection rectangle */
+#define V4L2_SEL_SIZE_GE 0x00000001
+#define V4L2_SEL_SIZE_LE 0x00000002
+
+enum v4l2_sel_target {
+ V4L2_SEL_CROP_ACTIVE = 0,
+ V4L2_SEL_CROP_DEFAULT = 1,
+ V4L2_SEL_CROP_BOUNDS = 2,
+ V4L2_SEL_COMPOSE_ACTIVE = 256 + 0,
+ V4L2_SEL_COMPOSE_DEFAULT = 256 + 1,
+ V4L2_SEL_COMPOSE_BOUNDS = 256 + 2,
+ V4L2_SEL_COMPOSE_PADDED = 256 + 3,
+};
+
+struct v4l2_selection {
+ enum v4l2_buf_type type;
+ enum v4l2_sel_target target;
+ __u32 flags;
+ struct v4l2_rect r;
+ __u32 reserved[9];
+};
+
+
/*
* A N A L O G V I D E O S T A N D A R D
*/
@@ -2182,6 +2205,10 @@ struct v4l2_dbg_chip_ident {
#define VIDIOC_SUBSCRIBE_EVENT _IOW('V', 90, struct v4l2_event_subscription)
#define VIDIOC_UNSUBSCRIBE_EVENT _IOW('V', 91, struct v4l2_event_subscription)
+/* Experimental crop/compose API */
+#define VIDIOC_G_SELECTION _IOWR('V', 92, struct v4l2_selection)
+#define VIDIOC_S_SELECTION _IOWR('V', 93, struct v4l2_selection)
+
/* Reminder: when adding new ioctls please add support for them to
drivers/media/video/v4l2-compat-ioctl32.c as well! */
diff --git a/include/media/v4l2-ioctl.h b/include/media/v4l2-ioctl.h
index dd9f1e7..2c0396b 100644
--- a/include/media/v4l2-ioctl.h
+++ b/include/media/v4l2-ioctl.h
@@ -194,6 +194,10 @@ struct v4l2_ioctl_ops {
struct v4l2_crop *a);
int (*vidioc_s_crop) (struct file *file, void *fh,
struct v4l2_crop *a);
+ int (*vidioc_g_selection) (struct file *file, void *fh,
+ struct v4l2_selection *a);
+ int (*vidioc_s_selection) (struct file *file, void *fh,
+ struct v4l2_selection *a);
/* Compression ioctls */
int (*vidioc_g_jpegcomp) (struct file *file, void *fh,
struct v4l2_jpegcompression *a);
--
1.7.6
--
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