File ffmpeg-4-CVE-2025-63757.patch of Package A_tw-ffmpeg-4

From 95d890bf18e535e1ae5a9e24d801ca021e288804 Mon Sep 17 00:00:00 2001
From: Jonathan Kang <jonathankang@gnome.org>
Date: Thu, 15 Jan 2026 15:28:26 +0800
Subject: [PATCH] swscale/output: Fix integer overflow in
 yuv2ya16_X_c_template()

---
 libswscale/output.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libswscale/output.c b/libswscale/output.c
index be22279229..49af3818b9 100644
--- a/libswscale/output.c
+++ b/libswscale/output.c
@@ -911,7 +911,7 @@ yuv2ya16_X_c_template(SwsContext *c, const int16_t *lumFilter,
         int A = 0xffff;
 
         for (j = 0; j < lumFilterSize; j++)
-            Y += lumSrc[j][i] * lumFilter[j];
+            Y += lumSrc[j][i] * (unsigned)lumFilter[j];
 
         Y >>= 15;
         Y += (1<<3) + 0x8000;
@@ -920,7 +920,7 @@ yuv2ya16_X_c_template(SwsContext *c, const int16_t *lumFilter,
         if (hasAlpha) {
             A = -0x40000000 + (1<<14);
             for (j = 0; j < lumFilterSize; j++)
-                A += alpSrc[j][i] * lumFilter[j];
+                A += alpSrc[j][i] * (unsigned)lumFilter[j];
 
             A >>= 15;
             A += 0x8000;
-- 
2.52.0