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vp9: Modify usage of force_skip under low temporal variance in non-rd pickmode.

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For short_circuit set to level 1, skip newmv for 64x64 blocks if the
low temporal variance flag is set. Also modify threshold for 64x64 split
in variance partitioning.

Overall speed-up on noisy clips of 2-4%.
Only affect speed >= 7.

Change-Id: I384b3772007e84de6f8707e480d2ddf1fe1f907d
This commit is contained in:
Marco 2017-01-13 15:13:36 -08:00
parent ee5b29ae30
commit 0f9760ab6f
2 changed files with 5 additions and 3 deletions
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2
vp9/encoder/vp9_encodeframe.c
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@ -1193,7 +1193,7 @@ static int choose_partitioning(VP9_COMP *cpi, const TileInfo *const tile,
// variance over the sub-32x32 blocks, then force this block to split.
// Only checking this for noise level >= medium for now.
if (!is_key_frame && noise_level >= kMedium &&
vt.part_variances.none.variance > (5 * avg_32x32) >> 4)
vt.part_variances.none.variance > (9 * avg_32x32) >> 5)
force_split[0] = 1;
// Else if the maximum 32x32 variance minus the miniumum 32x32 variance in
// a 64x64 block is greater than threshold and the maximum 32x32 variance is

6
vp9/encoder/vp9_pickmode.c
View File

@ -1577,8 +1577,10 @@ void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x, TileDataEnc *tile_data,
continue;
}
if (cpi->sf.short_circuit_low_temp_var >= 2 && force_skip_low_temp_var &&
ref_frame == LAST_FRAME && this_mode == NEWMV) {
if ((cpi->sf.short_circuit_low_temp_var >= 2 ||
(cpi->sf.short_circuit_low_temp_var == 1 && bsize == BLOCK_64X64)) &&
force_skip_low_temp_var && ref_frame == LAST_FRAME &&
this_mode == NEWMV) {
continue;
}