use RSHIFT

Originally committed as revision 5773 to svn://svn.ffmpeg.org/ffmpeg/trunk
19 years ago · d2744e19e0
parent 4501e678e7
commit d2744e19e0
1 changed files with 4 additions and 11 deletions
--- a/libavcodec/vp3.c
+++ b/libavcodec/vp3.c
@ -1145,17 +1145,10 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
                        motion_y[4] += motion_y[k];
                    }

-                    if (motion_x[4] >= 0)
-                        motion_x[4] = (motion_x[4] + 2) / 4;
-                    else
-                        motion_x[4] = (motion_x[4] - 2) / 4;
-                    motion_x[5] = motion_x[4];
-
-                    if (motion_y[4] >= 0)
-                        motion_y[4] = (motion_y[4] + 2) / 4;
-                    else
-                        motion_y[4] = (motion_y[4] - 2) / 4;
-                    motion_y[5] = motion_y[4];
+                    motion_x[5]=
+                    motion_x[4]= RSHIFT(motion_x[4], 2);
+                    motion_y[5]=
+                    motion_y[4]= RSHIFT(motion_y[4], 2);

                    /* vector maintenance; vector[3] is treated as the
                     * last vector in this case */