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, 10 insertions, 0 deletions

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index dcf6a543f3..ae5902f79d 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -4165,6 +4165,9 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
 
     c->prefetch= just_return;
 
+    memset(c->put_2tap_qpel_pixels_tab, 0, sizeof(c->put_2tap_qpel_pixels_tab));
+    memset(c->avg_2tap_qpel_pixels_tab, 0, sizeof(c->avg_2tap_qpel_pixels_tab));
+
 #ifdef HAVE_MMX
     dsputil_init_mmx(c, avctx);
 #endif
@@ -4193,6 +4196,13 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
     dsputil_init_bfin(c,avctx);
 #endif
 
+    for(i=0; i<64; i++){
+        if(!c->put_2tap_qpel_pixels_tab[0][i])
+            c->put_2tap_qpel_pixels_tab[0][i]= c->put_h264_qpel_pixels_tab[0][i];
+        if(!c->avg_2tap_qpel_pixels_tab[0][i])
+            c->avg_2tap_qpel_pixels_tab[0][i]= c->avg_h264_qpel_pixels_tab[0][i];
+    }
+
     switch(c->idct_permutation_type){
     case FF_NO_IDCT_PERM:
         for(i=0; i<64; i++)