X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=ycbcr.cpp;h=dc223e7441c845cf7c1449e439862c5732efc71f;hp=6dbcd9d94691e1a1190d1fcabf36c1ff373e1919;hb=5f81c29e307735bbadb3c0cb06500af627b2e57a;hpb=9580d67514ec138e65496aa1170c63b53f657207

diff --git a/ycbcr.cpp b/ycbcr.cpp
index 6dbcd9d..dc223e7 100644
--- a/ycbcr.cpp
+++ b/ycbcr.cpp
@@ -52,7 +52,7 @@ float compute_chroma_offset(float pos, unsigned subsampling_factor, unsigned res
 		// x + (-0) can be optimized away freely, as opposed to x + 0.
 		return -0.0;
 	} else {
-		return (local_chroma_pos - 0.5) / resolution;
+		return (0.5 - local_chroma_pos) / resolution;
 	}
 }
 
@@ -90,6 +90,7 @@ void compute_ycbcr_matrix(YCbCrFormat ycbcr_format, float* offset, Matrix3d* ycb
 	}
 
 	if (ycbcr_format.full_range) {
+		// TODO: Use num_levels.
 		offset[0] = 0.0 / 255.0;
 		offset[1] = 128.0 / 255.0;
 		offset[2] = 128.0 / 255.0;
@@ -99,6 +100,7 @@ void compute_ycbcr_matrix(YCbCrFormat ycbcr_format, float* offset, Matrix3d* ycb
 		scale[2] = 1.0;
 	} else {
 		// Rec. 601, page 4; Rec. 709, page 19; Rec. 2020, page 4.
+		// TODO: Use num_levels.
 		offset[0] = 16.0 / 255.0;
 		offset[1] = 128.0 / 255.0;
 		offset[2] = 128.0 / 255.0;