X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=image_format.h;h=7ca334c36016e4324f0cc75fac9ab8fe87af5cb3;hp=90f60347807faa1aa80035e7e34a6c81f20d92bc;hb=9651a4eaae012cdc49c1aa38197861e04f62e91e;hpb=b10c546f579c7ccb5939161e61a71cd18a3f9bbd

diff --git a/image_format.h b/image_format.h
index 90f6034..7ca334c 100644
--- a/image_format.h
+++ b/image_format.h
@@ -1,5 +1,15 @@
-#ifndef _IMAGE_FORMAT_H
-#define _IMAGE_FORMAT_H 1
+#ifndef _MOVIT_IMAGE_FORMAT_H
+#define _MOVIT_IMAGE_FORMAT_H 1
+
+// Note: Movit's internal processing formats do not have enough
+// accuracy to support 12-bit input, so if you want to use Rec. 2020,
+// you should probably stick to 10-bit, or accept somewhat reduced
+// accuracy for 12-bit. Input depths above 8 bits are also generally
+// less tested.
+//
+// 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 +28,7 @@ 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 +37,14 @@ 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 +52,4 @@ struct ImageFormat {
 	GammaCurve gamma_curve;
 };
 
-#endif  // !defined(_IMAGE_FORMAT_H)
+#endif  // !defined(_MOVIT_IMAGE_FORMAT_H)