[media] videodev2.h Add HSV encoding

Some hardware maps the Hue between 0 and 255 instead of 0-179. Support
this format with a new field hsv_enc.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 6b480c9..4364ce6 100644 (file)
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -335,6 +335,19 @@ enum v4l2_ycbcr_encoding {
 };
 
 /*
+ * enum v4l2_hsv_encoding values should not collide with the ones from
+ * enum v4l2_ycbcr_encoding.
+ */
+enum v4l2_hsv_encoding {
+
+       /* Hue mapped to 0 - 179 */
+       V4L2_HSV_ENC_180                = 128,
+
+       /* Hue mapped to 0-255 */
+       V4L2_HSV_ENC_256                = 129,
+};
+
+/*
  * Determine how YCBCR_ENC_DEFAULT should map to a proper Y'CbCr encoding.
  * This depends on the colorspace.
  */
@@ -362,9 +375,10 @@ enum v4l2_quantization {
  * This depends on whether the image is RGB or not, the colorspace and the
  * Y'CbCr encoding.
  */
-#define V4L2_MAP_QUANTIZATION_DEFAULT(is_rgb, colsp, ycbcr_enc) \
-       (((is_rgb) && (colsp) == V4L2_COLORSPACE_BT2020) ? V4L2_QUANTIZATION_LIM_RANGE : \
-        (((is_rgb) || (ycbcr_enc) == V4L2_YCBCR_ENC_XV601 || \
+#define V4L2_MAP_QUANTIZATION_DEFAULT(is_rgb_or_hsv, colsp, ycbcr_enc) \
+       (((is_rgb_or_hsv) && (colsp) == V4L2_COLORSPACE_BT2020) ? \
+        V4L2_QUANTIZATION_LIM_RANGE : \
+        (((is_rgb_or_hsv) || (ycbcr_enc) == V4L2_YCBCR_ENC_XV601 || \
          (ycbcr_enc) == V4L2_YCBCR_ENC_XV709 || (colsp) == V4L2_COLORSPACE_JPEG) || \
          (colsp) == V4L2_COLORSPACE_ADOBERGB || (colsp) == V4L2_COLORSPACE_SRGB ? \
         V4L2_QUANTIZATION_FULL_RANGE : V4L2_QUANTIZATION_LIM_RANGE))
@@ -462,7 +476,12 @@ struct v4l2_pix_format {
        __u32                   colorspace;     /* enum v4l2_colorspace */
        __u32                   priv;           /* private data, depends on pixelformat */
        __u32                   flags;          /* format flags (V4L2_PIX_FMT_FLAG_*) */
-       __u32                   ycbcr_enc;      /* enum v4l2_ycbcr_encoding */
+       union {
+               /* enum v4l2_ycbcr_encoding */
+               __u32                   ycbcr_enc;
+               /* enum v4l2_hsv_encoding */
+               __u32                   hsv_enc;
+       };
        __u32                   quantization;   /* enum v4l2_quantization */
        __u32                   xfer_func;      /* enum v4l2_xfer_func */
 };
@@ -2012,7 +2031,10 @@ struct v4l2_pix_format_mplane {
        struct v4l2_plane_pix_format    plane_fmt[VIDEO_MAX_PLANES];
        __u8                            num_planes;
        __u8                            flags;
-       __u8                            ycbcr_enc;
+        union {
+               __u8                            ycbcr_enc;
+               __u8                            hsv_enc;
+       };
        __u8                            quantization;
        __u8                            xfer_func;
        __u8                            reserved[7];