[x264-devel] commit: Improve bidir search, fix some artifacts in fades ( Jason Garrett-Glaser )
git version control
git at videolan.org
Mon Feb 15 10:10:43 CET 2010
x264 | branch: master | Jason Garrett-Glaser <darkshikari at gmail.com> | Tue Feb 2 03:15:18 2010 -0800| [1ec82b87c875c5fa6e66e9cbedb4ec04ac6c058c] | committer: Jason Garrett-Glaser
Improve bidir search, fix some artifacts in fades
Modify analysis to allow bidir to use different motion vectors than L0/L1.
Always try the <0,0,0,0> motion vector for bidir.
Eliminates almost all errant motion vectors in fades.
Slightly improves PSNR as well (~0.015db).
> http://git.videolan.org/gitweb.cgi/x264.git/?a=commit;h=1ec82b87c875c5fa6e66e9cbedb4ec04ac6c058c
---
encoder/analyse.c | 50 ++++++++++++++++++++++++++++++++++++++------------
1 files changed, 38 insertions(+), 12 deletions(-)
diff --git a/encoder/analyse.c b/encoder/analyse.c
index 666596b..1fb2206 100644
--- a/encoder/analyse.c
+++ b/encoder/analyse.c
@@ -40,6 +40,7 @@ typedef struct
int i_ref;
int i_rd16x16;
x264_me_t me16x16;
+ x264_me_t bi16x16; /* for b16x16 BI mode, since MVs can differ from l0/l1 */
/* 8x8 */
int i_cost8x8;
@@ -1722,20 +1723,45 @@ static void x264_mb_analyse_inter_b16x16( x264_t *h, x264_mb_analysis_t *a )
a->l1.me16x16.i_ref = a->l1.i_ref;
/* get cost of BI mode */
+ int ref_costs = REF_COST( 0, a->l0.i_ref ) + REF_COST( 1, a->l1.i_ref );
+ h->mc.memcpy_aligned( &a->l0.bi16x16, &a->l0.me16x16, sizeof(x264_me_t) );
+ h->mc.memcpy_aligned( &a->l1.bi16x16, &a->l1.me16x16, sizeof(x264_me_t) );
src0 = h->mc.get_ref( pix0, &stride0,
h->mb.pic.p_fref[0][a->l0.i_ref], h->mb.pic.i_stride[0],
- a->l0.me16x16.mv[0], a->l0.me16x16.mv[1], 16, 16, weight_none );
+ a->l0.bi16x16.mv[0], a->l0.bi16x16.mv[1], 16, 16, weight_none );
src1 = h->mc.get_ref( pix1, &stride1,
h->mb.pic.p_fref[1][a->l1.i_ref], h->mb.pic.i_stride[0],
- a->l1.me16x16.mv[0], a->l1.me16x16.mv[1], 16, 16, weight_none );
+ a->l1.bi16x16.mv[0], a->l1.bi16x16.mv[1], 16, 16, weight_none );
h->mc.avg[PIXEL_16x16]( pix0, 16, src0, stride0, src1, stride1, h->mb.bipred_weight[a->l0.i_ref][a->l1.i_ref] );
a->i_cost16x16bi = h->pixf.mbcmp[PIXEL_16x16]( h->mb.pic.p_fenc[0], FENC_STRIDE, pix0, 16 )
- + REF_COST( 0, a->l0.i_ref )
- + REF_COST( 1, a->l1.i_ref )
- + a->l0.me16x16.cost_mv
- + a->l1.me16x16.cost_mv;
+ + ref_costs
+ + a->l0.bi16x16.cost_mv
+ + a->l1.bi16x16.cost_mv;
+
+
+ /* Always try the 0,0,0,0 vector; helps avoid errant motion vectors in fades */
+ if( M32( a->l0.bi16x16.mv ) | M32( a->l1.bi16x16.mv ) )
+ {
+ int l0_mv_cost = a->l0.bi16x16.p_cost_mv[-a->l0.bi16x16.mvp[0]]
+ + a->l0.bi16x16.p_cost_mv[-a->l0.bi16x16.mvp[1]];
+ int l1_mv_cost = a->l1.bi16x16.p_cost_mv[-a->l1.bi16x16.mvp[0]]
+ + a->l1.bi16x16.p_cost_mv[-a->l1.bi16x16.mvp[1]];
+ h->mc.avg[PIXEL_16x16]( pix0, 16, h->mb.pic.p_fref[0][a->l0.i_ref][0], h->mb.pic.i_stride[0],
+ h->mb.pic.p_fref[1][a->l1.i_ref][0], h->mb.pic.i_stride[0],
+ h->mb.bipred_weight[a->l0.i_ref][a->l1.i_ref] );
+ int cost00 = h->pixf.mbcmp[PIXEL_16x16]( h->mb.pic.p_fenc[0], FENC_STRIDE, pix0, 16 )
+ + ref_costs + l0_mv_cost + l1_mv_cost;
+ if( cost00 < a->i_cost16x16bi )
+ {
+ M32( a->l0.bi16x16.mv ) = 0;
+ M32( a->l1.bi16x16.mv ) = 0;
+ a->l0.bi16x16.cost_mv = l0_mv_cost;
+ a->l1.bi16x16.cost_mv = l1_mv_cost;
+ a->i_cost16x16bi = cost00;
+ }
+ }
/* mb type cost */
a->i_cost16x16bi += a->i_lambda * i_mb_b_cost_table[B_BI_BI];
@@ -2205,7 +2231,7 @@ static void x264_refine_bidir( x264_t *h, x264_mb_analysis_t *a )
{
case D_16x16:
if( h->mb.i_type == B_BI_BI )
- x264_me_refine_bidir_satd( h, &a->l0.me16x16, &a->l1.me16x16, i_biweight );
+ x264_me_refine_bidir_satd( h, &a->l0.bi16x16, &a->l1.bi16x16, i_biweight );
break;
case D_16x8:
for( i=0; i<2; i++ )
@@ -2819,8 +2845,8 @@ intra_analysis:
}
else if( i_type == B_BI_BI )
{
- x264_me_refine_qpel( h, &analysis.l0.me16x16 );
- x264_me_refine_qpel( h, &analysis.l1.me16x16 );
+ x264_me_refine_qpel( h, &analysis.l0.bi16x16 );
+ x264_me_refine_qpel( h, &analysis.l1.bi16x16 );
}
}
else if( i_partition == D_16x8 )
@@ -2938,7 +2964,7 @@ intra_analysis:
x264_me_refine_qpel_rd( h, &analysis.l1.me16x16, analysis.i_lambda2, 0, 1 );
}
else if( i_type == B_BI_BI )
- x264_me_refine_bidir_rd( h, &analysis.l0.me16x16, &analysis.l1.me16x16, i_biweight, 0, analysis.i_lambda2 );
+ x264_me_refine_bidir_rd( h, &analysis.l0.bi16x16, &analysis.l1.bi16x16, i_biweight, 0, analysis.i_lambda2 );
}
else if( i_partition == D_16x8 )
{
@@ -3121,10 +3147,10 @@ static void x264_analyse_update_cache( x264_t *h, x264_mb_analysis_t *a )
break;
case B_BI_BI:
x264_macroblock_cache_ref( h, 0, 0, 4, 4, 0, a->l0.i_ref );
- x264_macroblock_cache_mv_ptr( h, 0, 0, 4, 4, 0, a->l0.me16x16.mv );
+ x264_macroblock_cache_mv_ptr( h, 0, 0, 4, 4, 0, a->l0.bi16x16.mv );
x264_macroblock_cache_ref( h, 0, 0, 4, 4, 1, a->l1.i_ref );
- x264_macroblock_cache_mv_ptr( h, 0, 0, 4, 4, 1, a->l1.me16x16.mv );
+ x264_macroblock_cache_mv_ptr( h, 0, 0, 4, 4, 1, a->l1.bi16x16.mv );
break;
}
break;
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