From 086698434d09537420e2da0775a90b3a6f7b84e4 Mon Sep 17 00:00:00 2001
From: Wan-Teh Chang <wtc@google.com>
Date: Wed, 26 Aug 2026 10:53:36 -0700
Subject: [PATCH] Enable LIBYUV_UNBIASED_DATA

LIBYUV_UNBIASED_DATA is a new configuration macro introduced in
commit ba68378. It fixes the AR30 rounding bias offset (+24 / -24) for
10-bit YUV to RGB conversions.

Bug: 551985141
Change-Id: Id724d8cabaee441147d998f77034bc3e31c25a9d
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8298160
Reviewed-by: Frank Barchard <fbarchard@google.com>
---
 BUILD.bazel    | 1 +
 BUILD.gn       | 1 +
 CMakeLists.txt | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/BUILD.bazel b/BUILD.bazel
index d71502313..98a0f1f74 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -52,6 +52,7 @@ PLATFORM_COPTS = select({
     "//conditions:default": [],
 }) + [
     "-DLIBYUV_DISABLE_SME",
+    "-DLIBYUV_UNBIASED_DATA",
     "-DLIBYUV_USE_ABSL_FLAGS",
     "-DGOOGLE_COMMANDLINEFLAGS_FULL_API",
 ]
diff --git a/BUILD.gn b/BUILD.gn
index d3fbd33e2..9e2618c87 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -25,6 +25,7 @@ config("libyuv_config") {
 
   # Define CHROMIUM to tell cpu_id to avoid sandbox unsafe system calls.
   defines = [ "CHROMIUM" ]
+  defines += [ "LIBYUV_UNBIASED_DATA" ]
   if (libyuv_enable_rowwin) {
     defines += [ "LIBYUV_ENABLE_ROWWIN=1" ]
   }
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 77e0527fc..abaa5e484 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,6 +66,8 @@ list ( SORT			ly_unittest_sources )
 
 include_directories( BEFORE ${ly_inc_dir} )
 
+add_definitions(-DLIBYUV_UNBIASED_DATA)
+
 if(MSVC)
   add_definitions ( -D_CRT_SECURE_NO_WARNINGS )
 endif()