commit 573793aceb2ec3541ae85b33eaaa54ad0cc6f5c2
author Vincent Rabaud <vrabaud@google.com> Thu Aug 29 16:47:06 2024 +0200
committer GitHub <noreply@github.com> Thu Aug 29 16:47:06 2024 +0200
tree 6c49268f1248e3fd142086bf9f2099a78cb84f66
parent 3dc10e20447fa696bf1698cd095df4d22e1afc64

Update the H273 URL to something that exists. (#2419)

src/colr.c

diff --git a/src/colr.c b/src/colr.c
index 7cb4d31..71d6691 100644
--- a/src/colr.c
+++ b/src/colr.c
@@ -108,7 +108,7 @@
     const float kb;
 };
 
-// https://www.itu.int/rec/T-REC-H.273-201612-I/en
+// https://www.itu.int/rec/T-REC-H.273-201612-S
 static const struct avifMatrixCoefficientsTable matrixCoefficientsTables[] = {
     //{ AVIF_MATRIX_COEFFICIENTS_IDENTITY, "Identity", 0.0f, 0.0f, }, // Handled elsewhere
     { AVIF_MATRIX_COEFFICIENTS_BT709, "BT.709", 0.2126f, 0.0722f },

src/reformat.c

diff --git a/src/reformat.c b/src/reformat.c
index c665b78..d59435d 100644
--- a/src/reformat.c
+++ b/src/reformat.c
@@ -183,7 +183,7 @@
     return AVIF_TRUE;
 }
 
-// Formulas 20-31 from https://www.itu.int/rec/T-REC-H.273-201612-I/en
+// Formulas 20-31 from https://www.itu.int/rec/T-REC-H.273-201612-S
 static int avifYUVColorSpaceInfoYToUNorm(avifYUVColorSpaceInfo * info, float v)
 {
     int unorm = (int)avifRoundf(v * info->rangeY + info->biasY);
@@ -350,12 +350,12 @@
 
                         // RGB -> YUV conversion
                         if (state.yuv.mode == AVIF_REFORMAT_MODE_IDENTITY) {
-                            // Formulas 41,42,43 from https://www.itu.int/rec/T-REC-H.273-201612-I/en
+                            // Formulas 41,42,43 from https://www.itu.int/rec/T-REC-H.273-201612-S
                             yuvBlock[bI][bJ].y = rgbPixel[1]; // G
                             yuvBlock[bI][bJ].u = rgbPixel[2]; // B
                             yuvBlock[bI][bJ].v = rgbPixel[0]; // R
                         } else if (state.yuv.mode == AVIF_REFORMAT_MODE_YCGCO) {
-                            // Formulas 44,45,46 from https://www.itu.int/rec/T-REC-H.273-201612-I/en
+                            // Formulas 44,45,46 from https://www.itu.int/rec/T-REC-H.273-201612-S
                             yuvBlock[bI][bJ].y = 0.5f * rgbPixel[1] + 0.25f * (rgbPixel[0] + rgbPixel[2]);
                             yuvBlock[bI][bJ].u = 0.5f * rgbPixel[1] - 0.25f * (rgbPixel[0] + rgbPixel[2]);
                             yuvBlock[bI][bJ].v = 0.5f * (rgbPixel[0] - rgbPixel[2]);
@@ -759,12 +759,12 @@
             float R, G, B;
             if (hasColor) {
                 if (state->yuv.mode == AVIF_REFORMAT_MODE_IDENTITY) {
-                    // Identity (GBR): Formulas 41,42,43 from https://www.itu.int/rec/T-REC-H.273-201612-I/en
+                    // Identity (GBR): Formulas 41,42,43 from https://www.itu.int/rec/T-REC-H.273-201612-S
                     G = Y;
                     B = Cb;
                     R = Cr;
                 } else if (state->yuv.mode == AVIF_REFORMAT_MODE_YCGCO) {
-                    // YCgCo: Formulas 47,48,49,50 from https://www.itu.int/rec/T-REC-H.273-201612-I/en
+                    // YCgCo: Formulas 47,48,49,50 from https://www.itu.int/rec/T-REC-H.273-201612-S
                     const float t = Y - Cb;
                     G = Y + Cb;
                     B = t - Cr;