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vp9: Use more aggressive skip when short_circuit_low_temp_var = 1.

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Use the same feature as https://chromium-review.googlesource.com/#/c/411327/,
but allow it to be used for speed  = 6 and 7, where
short_circuit_low_temp_var = 1.

Speed up of ~2-3% for speed 7, with little/no loss in compression.

Change-Id: I263a0f261ad9929034392d68f0153dc6376fdb5f
This commit is contained in:
Marco 2016-11-22 10:10:06 -08:00
parent 0966757874
commit b6597745f9
3 changed files with 9 additions and 5 deletions
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3
vp9/encoder/vp9_encodeframe.c
View File

@ -742,7 +742,8 @@ static void set_low_temp_var_flag(VP9_COMP *cpi, MACROBLOCK *x, MACROBLOCKD *xd,
continue;
if ((*this_mi)->sb_type == BLOCK_32X32) {
int64_t threshold_32x32 = cpi->sf.short_circuit_low_temp_var == 3
int64_t threshold_32x32 = (cpi->sf.short_circuit_low_temp_var == 1 ||
cpi->sf.short_circuit_low_temp_var == 3)
? ((3 * thresholds[1]) >> 2)
: (thresholds[1] >> 1);
if (vt->split[i].part_variances.none.variance < threshold_32x32)

7
vp9/encoder/vp9_pickmode.c
View File

@ -1490,8 +1490,11 @@ void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x, TileDataEnc *tile_data,
if (cpi->sf.short_circuit_low_temp_var) {
force_skip_low_temp_var =
get_force_skip_low_temp_var(&x->variance_low[0], mi_row, mi_col, bsize);
// In the most aggresive short circuit, skip golden in any mode
if (cpi->sf.short_circuit_low_temp_var == 3 && force_skip_low_temp_var) {
// If force_skip_low_temp_var is set, and for short circuit mode = 1 and 3,
// skip golden reference.
if ((cpi->sf.short_circuit_low_temp_var == 1 ||
cpi->sf.short_circuit_low_temp_var == 3) &&
force_skip_low_temp_var) {
usable_ref_frame = LAST_FRAME;
}
}

4
vp9/encoder/vp9_speed_features.h
View File

@ -457,11 +457,11 @@ typedef struct SPEED_FEATURES {
// Skip a number of expensive mode evaluations for blocks with very low
// temporal variance.
// 1: Skip golden non-zeromv and ALL INTRA for bsize >= 32x32.
// 1: Skip all golden modes and ALL INTRA for bsize >= 32x32.
// 2: Skip golden non-zeromv and newmv-last for bsize >= 16x16, skip ALL
// INTRA for bsize >= 32x32 and vert/horz INTRA for bsize 16x16, 16x32 and
// 32x16.
// 3: Same as (2), also skip golden in any mode for low res
// 3: Same as (2), but also skip golden zeromv for low res.
int short_circuit_low_temp_var;
// Limits the rd-threshold update for early exit for the newmv-last mode,