very minor optimization

Originally committed as revision 5136 to svn://svn.ffmpeg.org/ffmpeg/trunk
19 years ago · 9e801ee2fa
parent f7287c42b2
commit 9e801ee2fa
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@ -4966,7 +4966,7 @@ static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
        if(s->qscale >= s->intra_dc_threshold){
            block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0);

-            if(i == -1) i=0;
+            i -= i>>31; //if(i == -1) i=0;
        }

        mpeg4_pred_ac(s, block, n, dc_pred_dir);