X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fvc1dsp.c;h=778b811f1aec8041cf57e004c10d08b35cd6025b;hb=27e30c73d722ec13e59753dea91be00859c72bf2;hp=9239a4a1f5bf47f0ba2d555592238b5aac16dc0a;hpb=b065c71e9d2ad3c5d65f924a4003e3a7ee595417;p=ffmpeg

diff --git a/libavcodec/vc1dsp.c b/libavcodec/vc1dsp.c
index 9239a4a1f5b..778b811f1ae 100644
--- a/libavcodec/vc1dsp.c
+++ b/libavcodec/vc1dsp.c
@@ -107,12 +107,13 @@ static void vc1_v_s_overlap_c(int16_t *top, int16_t *bottom)
     }
 }
 
-static void vc1_h_s_overlap_c(int16_t *left, int16_t *right)
+static void vc1_h_s_overlap_c(int16_t *left, int16_t *right, int left_stride, int right_stride, int flags)
 {
     int i;
     int a, b, c, d;
     int d1, d2;
-    int rnd1 = 4, rnd2 = 3;
+    int rnd1 = flags & 2 ? 3 : 4;
+    int rnd2 = 7 - rnd1;
     for (i = 0; i < 8; i++) {
         a  = left[6];
         b  = left[7];
@@ -126,10 +127,12 @@ static void vc1_h_s_overlap_c(int16_t *left, int16_t *right)
         right[0] = ((c << 3) + d2 + rnd1) >> 3;
         right[1] = ((d << 3) + d1 + rnd2) >> 3;
 
-        right += 8;
-        left  += 8;
-        rnd2   = 7 - rnd2;
-        rnd1   = 7 - rnd1;
+        right += right_stride;
+        left  += left_stride;
+        if (flags & 1) {
+            rnd2   = 7 - rnd2;
+            rnd1   = 7 - rnd1;
+        }
     }
 }