GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-19 21:21:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

[media] v4l: add support for selection api

Browse source 
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@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Tomasz Stanislawski 2011-08-10 10:37:47 -03:00 • committed by Mauro Carvalho Chehab
parent dab734ec95
commit 0e8caaceff
4 changed files with 86 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

46
include/linux/videodev2.h
View file

@ -743,6 +743,48 @@ struct v4l2_crop {
struct v4l2_rect c;
};
/* Hints for adjustments of selection rectangle */
#define V4L2_SEL_FLAG_GE 0x00000001
#define V4L2_SEL_FLAG_LE 0x00000002
/* Selection targets */
/* current cropping area */
#define V4L2_SEL_TGT_CROP_ACTIVE 0
/* default cropping area */
#define V4L2_SEL_TGT_CROP_DEFAULT 1
/* cropping bounds */
#define V4L2_SEL_TGT_CROP_BOUNDS 2
/* current composing area */
#define V4L2_SEL_TGT_COMPOSE_ACTIVE 256
/* default composing area */
#define V4L2_SEL_TGT_COMPOSE_DEFAULT 257
/* composing bounds */
#define V4L2_SEL_TGT_COMPOSE_BOUNDS 258
/* current composing area plus all padding pixels */
#define V4L2_SEL_TGT_COMPOSE_PADDED 259
/**
* struct v4l2_selection - selection info
* @type: buffer type (do not use *_MPLANE types)
* @target: selection target, used to choose one of possible rectangles
* @flags: constraints flags
* @r: coordinates of selection window
* @reserved: for future use, rounds structure size to 64 bytes, set to zero
*
* Hardware may use multiple helper window to process a video stream.
* The structure is used to exchange this selection areas between
* an application and a driver.
*/
struct v4l2_selection {
__u32 type;
__u32 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
*/
@ -2259,6 +2301,10 @@ struct v4l2_create_buffers {
#define VIDIOC_CREATE_BUFS _IOWR('V', 92, struct v4l2_create_buffers)
#define VIDIOC_PREPARE_BUF _IOWR('V', 93, struct v4l2_buffer)
/* Experimental selection API */
#define VIDIOC_G_SELECTION _IOWR('V', 94, struct v4l2_selection)
#define VIDIOC_S_SELECTION _IOWR('V', 95, struct v4l2_selection)
/* Reminder: when adding new ioctls please add support for them to
drivers/media/video/v4l2-compat-ioctl32.c as well! */