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

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>

1 files changed, 7 insertions, 1 deletions

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index eb3bdd33816b..b73e8cda7192 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -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));
 
 /**