Commit 41e6eceb authored by Yunqing Wang's avatar Yunqing Wang

Improve motion search in real-time mode

Applied better MV prediction in real-time mode, which improves
the encoding quality.

Used quarter-pixel search instead of iterative sub-pixel search
for speed >=5 to improve encoding performance.

Tests on the test set showed:
1. For speed=-5, quality improvement: 1.7% on AvgPSNR and 2.1%
on SSIM, performance improvement: 3.6% (This counts in the
performance lose caused by MV prediction calculation in "Improve
MV prediction in vp8_pick_inter_mode() for speed>3").
2. For speed=-8, quality improvement: 2.1% on AvgPSNR and 2.5%
on SSIM. but, 6.9% performance decrease because of MV prediction
calculation. This should be improved later.

Change-Id: I349a96c452bd691081d8c8e3e54419e7f477bebd
parent eaadfb58
......@@ -779,15 +779,17 @@ int vp8_hex_search
int *num00,
const vp8_variance_fn_ptr_t *vfp,
int *mvsadcost[2],
int *mvcost[2]
int *mvcost[2],
MV *center_mv
)
{
MV hex[6] = { { -1, -2}, {1, -2}, {2, 0}, {1, 2}, { -1, 2}, { -2, 0} } ;
MV neighbors[8] = { { -1, -1}, { -1, 0}, { -1, 1}, {0, -1}, {0, 1}, {1, -1}, {1, 0}, {1, 1} } ;
MV neighbors[8] = { { -1, -1}, {0, -1}, {1, -1}, { -1, 0}, {1, 0}, { -1, 1}, {0, 1}, {1, 1} } ;
int i, j;
unsigned char *src = (*(b->base_src) + b->src);
int src_stride = b->src_stride;
int rr = ref_mv->row, rc = ref_mv->col, br = rr >> 3, bc = rc >> 3, tr, tc;
int rr = center_mv->row, rc = center_mv->col;
int br = ref_mv->row >> 3, bc = ref_mv->col >> 3, tr, tc;
unsigned int besterr, thiserr = 0x7fffffff;
int k = -1, tk;
......@@ -892,7 +894,7 @@ cal_neighbors:
best_mv->row = br;
best_mv->col = bc;
return vfp->vf(src, src_stride, PRE(br, bc), d->pre_stride, &thiserr) + MVC(br, bc) ;
return vfp->vf(src, src_stride, PRE(br, bc), d->pre_stride, &thiserr) + vp8_mv_err_cost(best_mv, center_mv, mvcost, error_per_bit) ;
}
#undef MVC
#undef PRE
......
......@@ -43,8 +43,8 @@ extern int vp8_hex_search
int *num00,
const vp8_variance_fn_ptr_t *vf,
int *mvsadcost[2],
int *mvcost[2]
int *mvcost[2],
MV *center_mv
);
typedef int (fractional_mv_step_fp)
......
......@@ -1118,6 +1118,7 @@ void vp8_set_speed_features(VP8_COMP *cpi)
#else
sf->search_method = DIAMOND;
#endif
sf->iterative_sub_pixel = 0;
cpi->mode_check_freq[THR_V_PRED] = 4;
cpi->mode_check_freq[THR_H_PRED] = 4;
......@@ -1169,7 +1170,6 @@ void vp8_set_speed_features(VP8_COMP *cpi)
int total_skip;
int min = 2000;
sf->iterative_sub_pixel = 0;
if (cpi->oxcf.encode_breakout > 2000)
min = cpi->oxcf.encode_breakout;
......
......@@ -718,7 +718,7 @@ int vp8_pick_inter_mode(VP8_COMP *cpi, MACROBLOCK *x, int recon_yoffset, int rec
if (cpi->sf.search_method == HEX)
{
bestsme = vp8_hex_search(x, b, d, &best_ref_mv, &d->bmi.mv.as_mv, step_param, sadpb/*x->errorperbit*/, &num00, &cpi->fn_ptr[BLOCK_16X16], x->mvsadcost, x->mvcost);
bestsme = vp8_hex_search(x, b, d, &mvp, &d->bmi.mv.as_mv, step_param, sadpb/*x->errorperbit*/, &num00, &cpi->fn_ptr[BLOCK_16X16], x->mvsadcost, x->mvcost, &best_ref_mv);
mode_mv[NEWMV].row = d->bmi.mv.as_mv.row;
mode_mv[NEWMV].col = d->bmi.mv.as_mv.col;
}
......
......@@ -1139,7 +1139,7 @@ void vp8_rd_check_segment(VP8_COMP *cpi, MACROBLOCK *x, BEST_SEG_INFO *bsi,
if (cpi->sf.search_method == HEX)
bestsme = vp8_hex_search(x, c, e, bsi->ref_mv,
&mode_mv[NEW4X4], step_param, sadpb, &num00, v_fn_ptr, x->mvsadcost, x->mvcost);
&mode_mv[NEW4X4], step_param, sadpb, &num00, v_fn_ptr, x->mvsadcost, x->mvcost, bsi->ref_mv);
else
{
......@@ -2068,7 +2068,7 @@ int vp8_rd_pick_inter_mode(VP8_COMP *cpi, MACROBLOCK *x, int recon_yoffset, int
if (cpi->sf.search_method == HEX)
{
bestsme = vp8_hex_search(x, b, d, &best_ref_mv, &d->bmi.mv.as_mv, step_param, sadpb/*x->errorperbit*/, &num00, &cpi->fn_ptr[BLOCK_16X16], x->mvsadcost, x->mvcost);
bestsme = vp8_hex_search(x, b, d, &best_ref_mv, &d->bmi.mv.as_mv, step_param, sadpb/*x->errorperbit*/, &num00, &cpi->fn_ptr[BLOCK_16X16], x->mvsadcost, x->mvcost, &best_ref_mv);
mode_mv[NEWMV].row = d->bmi.mv.as_mv.row;
mode_mv[NEWMV].col = d->bmi.mv.as_mv.col;
}
......
......@@ -204,7 +204,7 @@ static int vp8_temporal_filter_find_matching_mb_c
step_param,
sadpb/*x->errorperbit*/,
&num00, &cpi->fn_ptr[BLOCK_16X16],
mvsadcost, mvcost);
mvsadcost, mvcost, &best_ref_mv1);
}
else
{
......
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