swscale/swscale: fix integer overflow

Should fix fate failure with clang ftrapv Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
11 years ago · c9c0451224
parent 8683fa541b
commit c9c0451224
1 changed files with 3 additions and 2 deletions
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@ -208,8 +208,9 @@ static void lumRangeToJpeg16_c(int16_t *_dst, int width)
 {
    int i;
    int32_t *dst = (int32_t *) _dst;
-    for (i = 0; i < width; i++)
-        dst[i] = (FFMIN(dst[i], 30189 << 4) * 4769 - (39057361 << 2)) >> 12;
+    for (i = 0; i < width; i++) {
+        dst[i] = ((int)(FFMIN(dst[i], 30189 << 4) * 4769U - (39057361 << 2))) >> 12;
+    }
 }

 static void lumRangeFromJpeg16_c(int16_t *_dst, int width)