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vp9: 1 pass vbr: Skip find_predictors in pickmode when source is altref.

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When source frame is altref, we only do zero-mv mode, so we can skip
the find_predictors(). No change in compression.
Small speed gain, ~1%.

Only affects 1 pass vbr with lookhead altref, for ytlive with
the macro flag USE_ALTREF_FOR_ONE_PASS on.

Change-Id: I9318c5da8521f017bf54919cd652438b3a6313d1
This commit is contained in:
Marco 2016-12-15 16:10:30 -08:00
parent b5770a2007
commit e7c453b613
1 changed files with 16 additions and 6 deletions
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22
vp9/encoder/vp9_pickmode.c
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@ -1396,6 +1396,7 @@ void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x, TileDataEnc *tile_data,
int perform_intra_pred = 1;
int use_golden_nonzeromv = 1;
int force_skip_low_temp_var = 0;
int skip_ref_find_pred[4] = { 0 };
#if CONFIG_VP9_TEMPORAL_DENOISING
VP9_PICKMODE_CTX_DEN ctx_den;
int64_t zero_last_cost_orig = INT64_MAX;
@ -1470,9 +1471,15 @@ void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x, TileDataEnc *tile_data,
usable_ref_frame = GOLDEN_FRAME;
}
if (cpi->oxcf.lag_in_frames > 0 && cpi->oxcf.rc_mode == VPX_VBR &&
(cpi->rc.alt_ref_gf_group || cpi->rc.is_src_frame_alt_ref))
usable_ref_frame = ALTREF_FRAME;
if (cpi->oxcf.lag_in_frames > 0 && cpi->oxcf.rc_mode == VPX_VBR) {
if (cpi->rc.alt_ref_gf_group || cpi->rc.is_src_frame_alt_ref)
usable_ref_frame = ALTREF_FRAME;
if (cpi->rc.is_src_frame_alt_ref) {
skip_ref_find_pred[LAST_FRAME] = 1;
skip_ref_find_pred[GOLDEN_FRAME] = 1;
}
}
// For svc mode, on spatial_layer_id > 0: if the reference has different scale
// constrain the inter mode to only test zero motion.
@ -1505,9 +1512,11 @@ void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x, TileDataEnc *tile_data,
use_golden_nonzeromv = 0;
for (ref_frame = LAST_FRAME; ref_frame <= usable_ref_frame; ++ref_frame) {
find_predictors(cpi, x, ref_frame, frame_mv, const_motion,
&ref_frame_skip_mask, flag_list, tile_data, mi_row, mi_col,
yv12_mb, bsize, force_skip_low_temp_var);
if (!skip_ref_find_pred[ref_frame]) {
find_predictors(cpi, x, ref_frame, frame_mv, const_motion,
&ref_frame_skip_mask, flag_list, tile_data, mi_row,
mi_col, yv12_mb, bsize, force_skip_low_temp_var);
}
}
for (idx = 0; idx < RT_INTER_MODES; ++idx) {
@ -1527,6 +1536,7 @@ void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x, TileDataEnc *tile_data,
ref_frame = ref_mode_set_svc[idx].ref_frame;
}
if (ref_frame > usable_ref_frame) continue;
if (skip_ref_find_pred[ref_frame]) continue;
if (sf->short_circuit_flat_blocks && x->source_variance == 0 &&
this_mode != NEARESTMV) {