approximate qpel functions: sacrifice some quality for some decoding speed. enabled on B-frames with -lavdopts fast.

Originally committed as revision 6412 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 11 insertions, 0 deletions

diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index b53192d745..4000645c70 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -693,6 +693,17 @@ retry:
             s->next_p_frame_damaged=0;
     }
 
+    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && s->pict_type==B_TYPE){
+        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
+        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
+    }else if((!s->no_rounding) || s->pict_type==B_TYPE){
+        s->me.qpel_put= s->dsp.put_no_rnd_qpel_pixels_tab;
+        s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
+    }else{
+        s->me.qpel_put= s->dsp.put_qpel_pixels_tab;
+        s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
+    }
+
     if(MPV_frame_start(s, avctx) < 0)
         return -1;