1 files changed, 30 insertions, 0 deletions

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 81045aaabec9..003a91292a4f 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -231,6 +231,15 @@ enum v4l2_colorspace {
         V4L2_COLORSPACE_RAW           = 11,
 };
 
+/*
+ * Determine how COLORSPACE_DEFAULT should map to a proper colorspace.
+ * This depends on whether this is a SDTV image (use SMPTE 170M), an
+ * HDTV image (use Rec. 709), or something else (use sRGB).
+ */
+#define V4L2_MAP_COLORSPACE_DEFAULT(is_sdtv, is_hdtv) \
+        ((is_sdtv) ? V4L2_COLORSPACE_SMPTE170M : \
+         ((is_hdtv) ? V4L2_COLORSPACE_REC709 : V4L2_COLORSPACE_SRGB))
+
 enum v4l2_ycbcr_encoding {
         /*
          * Mapping of V4L2_YCBCR_ENC_DEFAULT to actual encodings for the
@@ -275,6 +284,16 @@ enum v4l2_ycbcr_encoding {
         V4L2_YCBCR_ENC_SMPTE240M      = 8,
 };
 
+/*
+ * Determine how YCBCR_ENC_DEFAULT should map to a proper Y'CbCr encoding.
+ * This depends on the colorspace.
+ */
+#define V4L2_MAP_YCBCR_ENC_DEFAULT(colsp) \
+        ((colsp) == V4L2_COLORSPACE_REC709 ? V4L2_YCBCR_ENC_709 : \
+         ((colsp) == V4L2_COLORSPACE_BT2020 ? V4L2_YCBCR_ENC_BT2020 : \
+          ((colsp) == V4L2_COLORSPACE_SMPTE240M ? V4L2_YCBCR_ENC_SMPTE240M : \
+           V4L2_YCBCR_ENC_601)))
+
 enum v4l2_quantization {
         /*
          * The default for R'G'B' quantization is always full range, except
@@ -287,6 +306,17 @@ enum v4l2_quantization {
         V4L2_QUANTIZATION_LIM_RANGE   = 2,
 };
 
+/*
+ * Determine how QUANTIZATION_DEFAULT should map to a proper 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 || \
+          (ycbcr_enc) == V4L2_YCBCR_ENC_XV709 || (colsp) == V4L2_COLORSPACE_JPEG) ? \
+         V4L2_QUANTIZATION_FULL_RANGE : V4L2_QUANTIZATION_LIM_RANGE))
+
 enum v4l2_priority {
         V4L2_PRIORITY_UNSET       = 0,  /* not initialized */
         V4L2_PRIORITY_BACKGROUND  = 1,