generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

vp9: Nonrd variance partition: increase threshold for using 4x4 avg.

Browse Source 
In variance partition low resolutions may use varianace based on
4x4 average for better partitioning.
Increase the threshold for doing this at speed = 8.

Improves speed by ~5%, with little loss, < 1%, on RTC_derf set.

Change-Id: Ib5ec420832ccff887a06cb5e1d2c73199b093941
This commit is contained in:
Marco 2016-10-21 11:11:34 -07:00
parent a7d116aa67
commit ee1b3f34c0
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
vp9/encoder/vp9_encodeframe.c
View File

@ -799,6 +799,7 @@ static int choose_partitioning(VP9_COMP *cpi, const TileInfo *const tile,
int min_var_32x32 = INT_MAX;
int var_32x32;
int avg_16x16[4];
int64_t threshold_4x4avg;
NOISE_LEVEL noise_level = kLow;
uint8_t *s;
const uint8_t *d;
@ -833,6 +834,9 @@ static int choose_partitioning(VP9_COMP *cpi, const TileInfo *const tile,
}
}
threshold_4x4avg =
(cpi->oxcf.speed < 8) ? thresholds[1] << 1 : thresholds[2] >> 1;
memset(x->variance_low, 0, sizeof(x->variance_low));
if (xd->mb_to_right_edge < 0) pixels_wide += (xd->mb_to_right_edge >> 3);
@ -999,7 +1003,7 @@ static int choose_partitioning(VP9_COMP *cpi, const TileInfo *const tile,
}
if (is_key_frame || (low_res &&
vt.split[i].split[j].part_variances.none.variance >
(thresholds[1] << 1))) {
threshold_4x4avg)) {
force_split[split_index] = 0;
// Go down to 4x4 down-sampling for variance.
variance4x4downsample[i2 + j] = 1;