X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=image_format.h;h=df6f48747cdc3e933dfa6cdaf6cec88f544b14a3;hp=90f60347807faa1aa80035e7e34a6c81f20d92bc;hb=9b95345e8e1dde29991638ed69def0cf187e28de;hpb=b10c546f579c7ccb5939161e61a71cd18a3f9bbd

diff --git a/image_format.h b/image_format.h
index 90f6034..df6f487 100644
--- a/image_format.h
+++ b/image_format.h
@@ -1,5 +1,11 @@
-#ifndef _IMAGE_FORMAT_H
-#define _IMAGE_FORMAT_H 1
+#ifndef _MOVIT_IMAGE_FORMAT_H
+#define _MOVIT_IMAGE_FORMAT_H 1
+
+// Note: Input depths above 8 bits have not been tested, so Rec. 2020
+// support should be regarded as somewhat untested (it assumes 10-
+// or 12-bit input). We also only support “conventional non-constant
+// luminance” for Rec. 2020, where Y' is derived from R'G'B' instead of
+// RGB, since this is the same system as used in Rec. 601 and 709.
 
 enum MovitPixelFormat {
 	FORMAT_RGB,
@@ -18,6 +24,7 @@ enum Colorspace {
 	COLORSPACE_REC_601_525 = 1,
 	COLORSPACE_REC_601_625 = 2,
 	COLORSPACE_XYZ = 3,  // Mostly useful for testing and debugging.
+	COLORSPACE_REC_2020 = 4,
 };
 
 enum GammaCurve {
@@ -26,11 +33,14 @@ enum GammaCurve {
 	GAMMA_sRGB = 1,
 	GAMMA_REC_601 = 2,
 	GAMMA_REC_709 = 2,  // Same as Rec. 601.
+	GAMMA_REC_2020_10_BIT = 2,  // Same as Rec. 601.
+	GAMMA_REC_2020_12_BIT = 3,
 };
 
 enum YCbCrLumaCoefficients {
 	YCBCR_REC_601 = 0,
 	YCBCR_REC_709 = 1,
+	YCBCR_REC_2020 = 2,
 };
 
 struct ImageFormat {
@@ -38,4 +48,4 @@ struct ImageFormat {
 	GammaCurve gamma_curve;
 };
 
-#endif  // !defined(_IMAGE_FORMAT_H)
+#endif  // !defined(_MOVIT_IMAGE_FORMAT_H)