Enable chessboard inter prediction filter type search
This commit enables a chessboard pattern prediction filter type
search scheme for rate-distortion optimization speed-up. For the
inferred motion vector modes, the encoder can re-use its above/left
neighbor blocks' prediction filter type and skip a full test on
all possible filter types. Such operation is turned on/off
alternatively in a chessboard manner.
It is turned on in speed 3. For test clip pedestrian 1080p, the
runtime is reduced from 231500 ms -> 221700 ms. The compression
performance is changed:
derf: -0.147%
yt: -0.134%
hd: -0.079%
stdhd: -0.220%
Change-Id: I1912f278e7576c2dc632688e3ad7a257410c605a
diff --git a/vp9/encoder/vp9_rdopt.c b/vp9/encoder/vp9_rdopt.c
index cdc7934..03a3c36 100644
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -2040,7 +2040,18 @@
uint8_t *orig_dst[MAX_MB_PLANE];
int orig_dst_stride[MAX_MB_PLANE];
int rs = 0;
- INTERP_FILTER best_filter = cm->interp_filter;
+ INTERP_FILTER best_filter = SWITCHABLE;
+
+ int bsl = mi_width_log2_lookup[bsize];
+ int pred_filter_search = cpi->sf.cb_pred_filter_search ?
+ (((mi_row + mi_col) >> bsl)) & 0x01 : 0;
+
+ if (pred_filter_search && this_mode != NEWMV) {
+ if (xd->up_available)
+ best_filter = xd->mi[-xd->mi_stride]->mbmi.interp_filter;
+ else if (xd->left_available)
+ best_filter = xd->mi[-1]->mbmi.interp_filter;
+ }
if (is_comp_pred) {
if (frame_mv[refs[0]].as_int == INVALID_MV ||
@@ -2124,10 +2135,9 @@
rd_opt->filter_cache[i] = INT64_MAX;
if (cm->interp_filter != BILINEAR) {
- best_filter = EIGHTTAP;
if (x->source_variance < cpi->sf.disable_filter_search_var_thresh) {
best_filter = EIGHTTAP;
- } else {
+ } else if (best_filter == SWITCHABLE) {
int newbest;
int tmp_rate_sum = 0;
int64_t tmp_dist_sum = 0;
diff --git a/vp9/encoder/vp9_speed_features.c b/vp9/encoder/vp9_speed_features.c
index 8fb4aa5..7315dd4 100644
--- a/vp9/encoder/vp9_speed_features.c
+++ b/vp9/encoder/vp9_speed_features.c
@@ -116,6 +116,7 @@
sf->disable_split_mask = DISABLE_ALL_INTER_SPLIT;
sf->adaptive_pred_interp_filter = 0;
+ sf->cb_pred_filter_search = 1;
sf->lf_motion_threshold = LOW_MOTION_THRESHOLD;
sf->last_partitioning_redo_frequency = 3;
@@ -332,6 +333,7 @@
sf->use_lp32x32fdct = 0;
sf->adaptive_motion_search = 0;
sf->adaptive_pred_interp_filter = 0;
+ sf->cb_pred_filter_search = 0;
sf->use_quant_fp = 0;
sf->reference_masking = 0;
sf->partition_search_type = SEARCH_PARTITION;
diff --git a/vp9/encoder/vp9_speed_features.h b/vp9/encoder/vp9_speed_features.h
index bdbbe58..929acaf 100644
--- a/vp9/encoder/vp9_speed_features.h
+++ b/vp9/encoder/vp9_speed_features.h
@@ -283,6 +283,9 @@
// was selected, and 2 means we use 8 tap if no 8x8 filter mode was selected.
int adaptive_pred_interp_filter;
+ // Chessboard pattern prediction filter type search
+ int cb_pred_filter_search;
+
// Fast quantization process path
int use_quant_fp;