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Remove CONSTRAIN_NEIGHBORING_MIN_MAX.

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Remove one of the auto partition size cases.
This case can behaves badly in some types of animated content
and was only used for the rd encode path. A subsequent patch
will add additional checks to help further improve visual quality.

Change-Id: I0ebd8da3d45ab8501afa45d7959ced8c2d60ee4e
This commit is contained in:
paulwilkins 2015-05-01 11:31:13 +01:00
parent e0786c280e
commit 287b0c6da9
3 changed files with 3 additions and 31 deletions
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29
vp9/encoder/vp9_encodeframe.c
View File

@ -2157,7 +2157,6 @@ static void rd_auto_partition_range(VP9_COMP *cpi, const TileInfo *const tile,
int bh, bw; int bh, bw;
BLOCK_SIZE min_size = BLOCK_4X4; BLOCK_SIZE min_size = BLOCK_4X4;
BLOCK_SIZE max_size = BLOCK_64X64; BLOCK_SIZE max_size = BLOCK_64X64;
int i = 0;
int bs_hist[BLOCK_SIZES] = {0}; int bs_hist[BLOCK_SIZES] = {0};
// Trap case where we do not have a prediction. // Trap case where we do not have a prediction.
@ -2187,36 +2186,10 @@ static void rd_auto_partition_range(VP9_COMP *cpi, const TileInfo *const tile,
bs_hist); bs_hist);
} }
// adjust observed min and max // Adjust observed min and max for "relaxed" auto partition case.
if (cpi->sf.auto_min_max_partition_size == RELAXED_NEIGHBORING_MIN_MAX) { if (cpi->sf.auto_min_max_partition_size == RELAXED_NEIGHBORING_MIN_MAX) {
min_size = min_partition_size[min_size]; min_size = min_partition_size[min_size];
max_size = max_partition_size[max_size]; max_size = max_partition_size[max_size];
} else if (cpi->sf.auto_min_max_partition_size ==
CONSTRAIN_NEIGHBORING_MIN_MAX) {
// adjust the search range based on the histogram of the observed
// partition sizes from left, above the previous co-located blocks
int sum = 0;
int first_moment = 0;
int second_moment = 0;
int var_unnormalized = 0;
for (i = 0; i < BLOCK_SIZES; i++) {
sum += bs_hist[i];
first_moment += bs_hist[i] * i;
second_moment += bs_hist[i] * i * i;
}
// if variance is small enough,
// adjust the range around its mean size, which gives a tighter range
var_unnormalized = second_moment - first_moment * first_moment / sum;
if (var_unnormalized <= 4 * sum) {
int mean = first_moment / sum;
min_size = min_partition_size[mean];
max_size = max_partition_size[mean];
} else {
min_size = min_partition_size[min_size];
max_size = max_partition_size[max_size];
}
} }
} }

2
vp9/encoder/vp9_speed_features.c
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@ -115,7 +115,7 @@ static void set_good_speed_feature(VP9_COMP *cpi, VP9_COMMON *cm,
FLAG_SKIP_INTRA_LOWVAR; FLAG_SKIP_INTRA_LOWVAR;
sf->disable_filter_search_var_thresh = 100; sf->disable_filter_search_var_thresh = 100;
sf->comp_inter_joint_search_thresh = BLOCK_SIZES; sf->comp_inter_joint_search_thresh = BLOCK_SIZES;
sf->auto_min_max_partition_size = CONSTRAIN_NEIGHBORING_MIN_MAX; sf->auto_min_max_partition_size = RELAXED_NEIGHBORING_MIN_MAX;
sf->allow_partition_search_skip = 1; sf->allow_partition_search_skip = 1;
} }

3
vp9/encoder/vp9_speed_features.h
View File

@ -101,8 +101,7 @@ typedef enum {
typedef enum { typedef enum {
NOT_IN_USE = 0, NOT_IN_USE = 0,
RELAXED_NEIGHBORING_MIN_MAX = 1, RELAXED_NEIGHBORING_MIN_MAX = 1,
CONSTRAIN_NEIGHBORING_MIN_MAX = 2, STRICT_NEIGHBORING_MIN_MAX = 2
STRICT_NEIGHBORING_MIN_MAX = 3
} AUTO_MIN_MAX_MODE; } AUTO_MIN_MAX_MODE;
typedef enum { typedef enum {