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vp9: Set low variance flag when partition is copied.

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Also set the flag to 1 when exit early choosing 64x64 block
such that skipping new mv for golden works in these scenerios.

Change the size of prev_segment_id to the number of superblocks
to save memory.

Borg test shows quality regression of 0.012% on average PSNR
and 0.035% on SSIM.

Change-Id: I5014224c8617d439d35c66ece3fed9ae30b31d23
This commit is contained in:
Jerome Jiang 2017-01-13 11:28:27 -08:00
parent f217049dbe
commit 0c65aed099
4 changed files with 24 additions and 5 deletions
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11
vp9/encoder/vp9_encodeframe.c
View File

@ -924,7 +924,7 @@ static int choose_partitioning(VP9_COMP *cpi, const TileInfo *const tile,
const int low_res = (cm->width <= 352 && cm->height <= 288);
int variance4x4downsample[16];
int segment_id;
int offset = cm->mi_stride * mi_row + mi_col;
int sb_offset = (cm->mi_stride >> 3) * (mi_row >> 3) + (mi_col >> 3);
set_offsets(cpi, tile, x, mi_row, mi_col, BLOCK_64X64);
segment_id = xd->mi[0]->segment_id;
@ -1035,6 +1035,7 @@ static int choose_partitioning(VP9_COMP *cpi, const TileInfo *const tile,
if (mi_col + block_width / 2 < cm->mi_cols &&
mi_row + block_height / 2 < cm->mi_rows) {
set_block_size(cpi, x, xd, mi_row, mi_col, BLOCK_64X64);
x->variance_low[0] = 1;
chroma_check(cpi, x, bsize, y_sad, is_key_frame);
return 0;
}
@ -1045,11 +1046,13 @@ static int choose_partitioning(VP9_COMP *cpi, const TileInfo *const tile,
// TODO(jianj) : tune the threshold.
if (cpi->sf.copy_partition_flag && cpi->rc.frames_since_key > 1 &&
segment_id == CR_SEGMENT_ID_BASE &&
cpi->prev_segment_id[offset] == CR_SEGMENT_ID_BASE &&
cpi->prev_segment_id[sb_offset] == CR_SEGMENT_ID_BASE &&
y_sad_last < cpi->vbp_threshold_copy) {
if (cpi->prev_partition != NULL) {
copy_prev_partition(cpi, BLOCK_64X64, mi_row, mi_col);
chroma_check(cpi, x, bsize, y_sad, is_key_frame);
memcpy(x->variance_low, &(cpi->prev_variance_low[sb_offset * 25]),
sizeof(x->variance_low));
return 0;
}
}
@ -1249,7 +1252,9 @@ static int choose_partitioning(VP9_COMP *cpi, const TileInfo *const tile,
if (cm->frame_type != KEY_FRAME && cpi->sf.copy_partition_flag) {
update_prev_partition(cpi, BLOCK_64X64, mi_row, mi_col);
cpi->prev_segment_id[offset] = segment_id;
cpi->prev_segment_id[sb_offset] = segment_id;
memcpy(&(cpi->prev_variance_low[sb_offset * 25]), x->variance_low,
sizeof(x->variance_low));
}
if (cpi->sf.short_circuit_low_temp_var) {

3
vp9/encoder/vp9_encoder.c
View File

@ -456,6 +456,9 @@ static void dealloc_compressor_data(VP9_COMP *cpi) {
vpx_free(cpi->prev_segment_id);
cpi->prev_segment_id = NULL;
vpx_free(cpi->prev_variance_low);
cpi->prev_variance_low = NULL;
vp9_cyclic_refresh_free(cpi->cyclic_refresh);
cpi->cyclic_refresh = NULL;

6
vp9/encoder/vp9_encoder.h
View File

@ -633,6 +633,12 @@ typedef struct VP9_COMP {
// Previous Partition Info
BLOCK_SIZE *prev_partition;
int8_t *prev_segment_id;
// Used to save the status of whether a block has a low variance in
// choose_partitioning. 0 for 64x64, 1~2 for 64x32, 3~4 for 32x64, 5~8 for
// 32x32, 9~24 for 16x16.
// This is for the last frame and is copied to the current frame
// when partition copy happens.
uint8_t *prev_variance_low;
LevelConstraint level_constraint;
} VP9_COMP;

9
vp9/encoder/vp9_speed_features.c
View File

@ -507,8 +507,13 @@ static void set_rt_speed_feature(VP9_COMP *cpi, SPEED_FEATURES *sf, int speed,
cm->mi_stride * cm->mi_rows, sizeof(BLOCK_SIZE));
}
if (cpi->prev_segment_id == NULL) {
cpi->prev_segment_id =
(int8_t *)vpx_calloc(cm->mi_stride * cm->mi_rows, sizeof(int8_t));
cpi->prev_segment_id = (int8_t *)vpx_calloc(
(cm->mi_stride >> 3) * ((cm->mi_rows >> 3) + 1), sizeof(int8_t));
}
if (cpi->prev_variance_low == NULL) {
cpi->prev_variance_low = (uint8_t *)vpx_calloc(
(cm->mi_stride >> 3) * ((cm->mi_rows >> 3) + 1) * 25,
sizeof(uint8_t));
}
}
sf->mv.subpel_force_stop = (content == VP9E_CONTENT_SCREEN) ? 3 : 2;