Fix pixel value overflow

HomeOfVapourSynthEvolution · Dec 24, 2014 · 896fc86 · 896fc86
1 parent 3405e36
commit 896fc86
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/AddGrain/AddGrain.cpp b/AddGrain/AddGrain.cpp
@@ -167,7 +167,8 @@ static void UpdateFrame(T1 * dstp, const int width, const int height, const int
             T2 val = (dstp[x] << shift1) ^ lower;
             const T2 nz = pNW2[x] >> shift2;
             val = std::min(std::max(val + nz, lower), upper);
-            dstp[x] = (val ^ lower) >> shift1;
+            dstp[x] = val ^ lower;
+            dstp[x] >>= shift1;
         }
         dstp += stride;
         pNW2 += d->nPitch[plane];