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[media] v4l: Add premultiplied alpha flag for pixel formats

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When set, the new V4L2_PIX_FMT_FLAG_PREMUL_ALPHA flag indicates that the
pixel values are premultiplied by the alpha channel value.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Laurent Pinchart
2014-05-27 10:12:43 -03:00
committed by Mauro Carvalho Chehab
parent d52e238136
commit c96fd46afb
4 changed files with 41 additions and 5 deletions
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8
include/uapi/linux/videodev2.h
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@@ -288,6 +288,7 @@ struct v4l2_pix_format {
__u32 sizeimage;
__u32 colorspace; /* enum v4l2_colorspace */
__u32 priv; /* private data, depends on pixelformat */
__u32 flags; /* format flags (V4L2_PIX_FMT_FLAG_*) */
};
/* Pixel format FOURCC depth Description */
@@ -452,6 +453,9 @@ struct v4l2_pix_format {
/* priv field value to indicates that subsequent fields are valid. */
#define V4L2_PIX_FMT_PRIV_MAGIC 0xfeedcafe
/* Flags */
#define V4L2_PIX_FMT_FLAG_PREMUL_ALPHA 0x00000001
/*
* F O R M A T E N U M E R A T I O N
*/
@@ -1754,6 +1758,7 @@ struct v4l2_plane_pix_format {
* @colorspace: enum v4l2_colorspace; supplemental to pixelformat
* @plane_fmt: per-plane information
* @num_planes: number of planes for this format
* @flags: format flags (V4L2_PIX_FMT_FLAG_*)
*/
struct v4l2_pix_format_mplane {
__u32 width;
@@ -1764,7 +1769,8 @@ struct v4l2_pix_format_mplane {
struct v4l2_plane_pix_format plane_fmt[VIDEO_MAX_PLANES];
__u8 num_planes;
__u8 reserved[11];
__u8 flags;
__u8 reserved[10];
} __attribute__ ((packed));
/**