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vp9: Refactor choose_partitioning.

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Move skin superblock force split out of this function as well
as some minor code refactors. Checked bitexact for different speed
settings and different resolutions.

Change-Id: I6078cbe88dd9ce6c0b69470a8a0a8f8d2274161b
This commit is contained in:
JackyChen
2016-04-29 15:19:28 -07:00
parent 5d27ee1c08
commit 136c29e3a3
1 changed files with 74 additions and 64 deletions
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132
vp9/encoder/vp9_encodeframe.c
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@@ -662,6 +662,73 @@ static void fill_variance_8x8avg(const uint8_t *s, int sp, const uint8_t *d,
}
}
#if !CONFIG_VP9_HIGHBITDEPTH
// Check if most of the superblock is skin content, and if so, force split to
// 32x32, and set x->sb_is_skin for use in mode selection.
static int skin_sb_split(VP9_COMP *cpi, MACROBLOCK *x, const int low_res,
int mi_row, int mi_col, int *force_split) {
VP9_COMMON * const cm = &cpi->common;
// Avoid checking superblocks on/near boundary and avoid low resolutions.
// Note superblock may still pick 64X64 if y_sad is very small
// (i.e., y_sad < cpi->vbp_threshold_sad) below. For now leave this as is.
if (!low_res && (mi_col >= 8 && mi_col + 8 < cm->mi_cols && mi_row >= 8 &&
mi_row + 8 < cm->mi_rows)) {
int num_16x16_skin = 0;
int num_16x16_nonskin = 0;
uint8_t *ysignal = x->plane[0].src.buf;
uint8_t *usignal = x->plane[1].src.buf;
uint8_t *vsignal = x->plane[2].src.buf;
int sp = x->plane[0].src.stride;
int spuv = x->plane[1].src.stride;
const int block_index = mi_row * cm->mi_cols + mi_col;
const int bw = num_8x8_blocks_wide_lookup[BLOCK_64X64];
const int bh = num_8x8_blocks_high_lookup[BLOCK_64X64];
const int xmis = VPXMIN(cm->mi_cols - mi_col, bw);
const int ymis = VPXMIN(cm->mi_rows - mi_row, bh);
// Loop through the 16x16 sub-blocks.
int i, j;
for (i = 0; i < ymis; i+=2) {
for (j = 0; j < xmis; j+=2) {
int bl_index = block_index + i * cm->mi_cols + j;
int bl_index1 = bl_index + 1;
int bl_index2 = bl_index + cm->mi_cols;
int bl_index3 = bl_index2 + 1;
int consec_zeromv = VPXMIN(cpi->consec_zero_mv[bl_index],
VPXMIN(cpi->consec_zero_mv[bl_index1],
VPXMIN(cpi->consec_zero_mv[bl_index2],
cpi->consec_zero_mv[bl_index3])));
int is_skin = vp9_compute_skin_block(ysignal,
usignal,
vsignal,
sp,
spuv,
BLOCK_16X16,
consec_zeromv,
0);
num_16x16_skin += is_skin;
num_16x16_nonskin += (1 - is_skin);
if (num_16x16_nonskin > 3) {
// Exit loop if at least 4 of the 16x16 blocks are not skin.
i = ymis;
break;
}
ysignal += 16;
usignal += 8;
vsignal += 8;
}
ysignal += (sp << 4) - 64;
usignal += (spuv << 3) - 32;
vsignal += (spuv << 3) - 32;
}
if (num_16x16_skin > 12) {
*force_split = 1;
return 1;
}
}
return 0;
}
#endif
// This function chooses partitioning based on the variance between source and
// reconstructed last, where variance is computed for down-sampled inputs.
static int choose_partitioning(VP9_COMP *cpi,
@@ -771,70 +838,13 @@ static int choose_partitioning(VP9_COMP *cpi,
set_ref_ptrs(cm, xd, mi->ref_frame[0], mi->ref_frame[1]);
vp9_build_inter_predictors_sb(xd, mi_row, mi_col, BLOCK_64X64);
// Check if most of the superblock is skin content, and if so, force split
// to 32x32, and set x->sb_is_skin for use in mode selection.
// Avoid checking superblocks on/near boundary and avoid low resolutions.
// Note superblock may still pick 64X64 if y_sad is very small
// (i.e., y_sad < cpi->vbp_threshold_sad) below. For now leave this as is.
x->sb_is_skin = 0;
#if !CONFIG_VP9_HIGHBITDEPTH
if (cpi->use_skin_detection && !low_res && (mi_col >= 8 &&
mi_col + 8 < cm->mi_cols && mi_row >= 8 && mi_row + 8 < cm->mi_rows)) {
int bl_index1, bl_index2, bl_index3;
int num_16x16_skin = 0;
int num_16x16_nonskin = 0;
int is_skin = 0;
int consec_zeromv = 0;
uint8_t *ysignal = x->plane[0].src.buf;
uint8_t *usignal = x->plane[1].src.buf;
uint8_t *vsignal = x->plane[2].src.buf;
int spuv = x->plane[1].src.stride;
const int block_index = mi_row * cm->mi_cols + mi_col;
const int bw = num_8x8_blocks_wide_lookup[BLOCK_64X64];
const int bh = num_8x8_blocks_high_lookup[BLOCK_64X64];
const int xmis = VPXMIN(cm->mi_cols - mi_col, bw);
const int ymis = VPXMIN(cm->mi_rows - mi_row, bh);
// Loop through the 16x16 sub-blocks.
int j, i;
for (i = 0; i < ymis; i+=2) {
for (j = 0; j < xmis; j+=2) {
int bl_index = block_index + i * cm->mi_cols + j;
bl_index1 = bl_index + 1;
bl_index2 = bl_index + cm->mi_cols;
bl_index3 = bl_index2 + 1;
consec_zeromv = VPXMIN(cpi->consec_zero_mv[bl_index],
VPXMIN(cpi->consec_zero_mv[bl_index1],
VPXMIN(cpi->consec_zero_mv[bl_index2],
cpi->consec_zero_mv[bl_index3])));
is_skin = vp9_compute_skin_block(ysignal,
usignal,
vsignal,
sp,
spuv,
BLOCK_16X16,
consec_zeromv,
0);
num_16x16_skin += is_skin;
num_16x16_nonskin += (1 - is_skin);
if (num_16x16_nonskin > 3) {
// Exit loop if at least 4 of the 16x16 blocks are not skin.
i = ymis;
j = xmis;
}
ysignal += 16;
usignal += 8;
vsignal += 8;
}
ysignal += (sp << 4) - 64;
usignal += (spuv << 3) - 32;
vsignal += (spuv << 3) - 32;
}
if (num_16x16_skin > 12) {
x->sb_is_skin = 1;
force_split[0] = 1;
}
}
if (cpi->use_skin_detection)
x->sb_is_skin = skin_sb_split(cpi, x, low_res, mi_row, mi_col,
&force_split[0]);
#endif
for (i = 1; i <= 2; ++i) {
struct macroblock_plane *p = &x->plane[i];
struct macroblockd_plane *pd = &xd->plane[i];