shithub: libvpx

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Disable zero bin mode boost.

As things stand the zero bin mode boost is hurting somewhat.
In part this seems to be because the boost applied as is
interferes with the rd mode selection loop.

Average gains (derf 0.072, yt 0.243, ythd 0.179 std-hd 0.212%)

Change-Id: Icaecea3908d9a7352370e49b8fa822f2c2c49dc1

--- a/vp9/encoder/vp9_onyx_if.c

+++ b/vp9/encoder/vp9_onyx_if.c

@@ -2698,10 +2698,10 @@

   // is above a threshold

   cpi->zbin_mode_boost = 0;

-  if (cpi->oxcf.lossless)

+  // if (cpi->oxcf.lossless)

     cpi->zbin_mode_boost_enabled = FALSE;

-  else

-    cpi->zbin_mode_boost_enabled = TRUE;

+  // else

+  //   cpi->zbin_mode_boost_enabled = TRUE;

   // Current default encoder behaviour for the altref sign bias

   if (cpi->source_alt_ref_active)

--- a/vp9/encoder/vp9_onyx_int.h

+++ b/vp9/encoder/vp9_onyx_int.h

@@ -51,9 +51,9 @@

 #define MIN_THRESHMULT  32

 #define MAX_THRESHMULT  512

-#define GF_ZEROMV_ZBIN_BOOST 12

-#define LF_ZEROMV_ZBIN_BOOST 6

-#define MV_ZBIN_BOOST        4

+#define GF_ZEROMV_ZBIN_BOOST 0

+#define LF_ZEROMV_ZBIN_BOOST 0

+#define MV_ZBIN_BOOST        0

 #define SPLIT_MV_ZBIN_BOOST  0

 #define INTRA_ZBIN_BOOST     0