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Limit cyclic refresh on steady background blocks.

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Use the existing QP condition on limiting cyclic refresh, and add
addiitonal condition that block has been encoded with zero/small motion
x frames in row (where x is at least several times the refresh period).
Additional condition only affect non-screen content mode.

This helps to improve visual stability for noisy input, where on steady
background areas the application of delta_qp may lead to encoding the noise.

Also added a change to use the true skip (after encoding) to update the
last QP.

Change-Id: I234a1128d017d284cf767fdb58ef6c59d809f679
This commit is contained in:
Marco 2015-06-23 08:34:06 -07:00
parent 7e54f0fe4b
commit 3f7656cc23
3 changed files with 56 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
vp9/encoder/vp9_aq_cyclicrefresh.c
View File

@ -23,6 +23,7 @@
CYCLIC_REFRESH *vp9_cyclic_refresh_alloc(int mi_rows, int mi_cols) {
size_t last_coded_q_map_size;
size_t consec_zero_mv_size;
CYCLIC_REFRESH *const cr = vpx_calloc(1, sizeof(*cr));
if (cr == NULL)
return NULL;
@ -41,12 +42,20 @@ CYCLIC_REFRESH *vp9_cyclic_refresh_alloc(int mi_rows, int mi_cols) {
assert(MAXQ <= 255);
memset(cr->last_coded_q_map, MAXQ, last_coded_q_map_size);
consec_zero_mv_size = mi_rows * mi_cols * sizeof(*cr->consec_zero_mv);
cr->consec_zero_mv = vpx_malloc(consec_zero_mv_size);
if (cr->consec_zero_mv == NULL) {
vpx_free(cr);
return NULL;
}
memset(cr->consec_zero_mv, 0, consec_zero_mv_size);
return cr;
}
void vp9_cyclic_refresh_free(CYCLIC_REFRESH *cr) {
vpx_free(cr->map);
vpx_free(cr->last_coded_q_map);
vpx_free(cr->consec_zero_mv);
vpx_free(cr);
}
@ -228,20 +237,46 @@ void vp9_cyclic_refresh_update_segment(VP9_COMP *const cpi,
int map_offset = block_index + y * cm->mi_cols + x;
cr->map[map_offset] = new_map_value;
cpi->segmentation_map[map_offset] = mbmi->segment_id;
}
}
void vp9_cyclic_refresh_update_sb_postencode(VP9_COMP *const cpi,
const MB_MODE_INFO *const mbmi,
int mi_row, int mi_col,
BLOCK_SIZE bsize) {
const VP9_COMMON *const cm = &cpi->common;
CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
MV mv = mbmi->mv[0].as_mv;
const int bw = num_8x8_blocks_wide_lookup[bsize];
const int bh = num_8x8_blocks_high_lookup[bsize];
const int xmis = VPXMIN(cm->mi_cols - mi_col, bw);
const int ymis = VPXMIN(cm->mi_rows - mi_row, bh);
const int block_index = mi_row * cm->mi_cols + mi_col;
int x, y;
for (y = 0; y < ymis; y++)
for (x = 0; x < xmis; x++) {
int map_offset = block_index + y * cm->mi_cols + x;
// Inter skip blocks were clearly not coded at the current qindex, so
// don't update the map for them. For cases where motion is non-zero or
// the reference frame isn't the previous frame, the previous value in
// the map for this spatial location is not entirely correct.
if ((!is_inter_block(mbmi) || !skip) &&
if ((!is_inter_block(mbmi) || !mbmi->skip) &&
mbmi->segment_id <= CR_SEGMENT_ID_BOOST2) {
cr->last_coded_q_map[map_offset] = clamp(
cm->base_qindex + cr->qindex_delta[mbmi->segment_id], 0, MAXQ);
} else if (is_inter_block(mbmi) && skip &&
} else if (is_inter_block(mbmi) && mbmi->skip &&
mbmi->segment_id <= CR_SEGMENT_ID_BOOST2) {
cr->last_coded_q_map[map_offset] = VPXMIN(
clamp(cm->base_qindex + cr->qindex_delta[mbmi->segment_id],
0, MAXQ),
cr->last_coded_q_map[map_offset]);
// Update the consecutive zero/low_mv count.
if (is_inter_block(mbmi) && (abs(mv.row) < 8 && abs(mv.col) < 8)) {
if (cr->consec_zero_mv[map_offset] < 255)
cr->consec_zero_mv[map_offset]++;
} else {
cr->consec_zero_mv[map_offset] = 0;
}
}
}
}
@ -380,9 +415,10 @@ static void cyclic_refresh_update_map(VP9_COMP *const cpi) {
int mi_row = sb_row_index * MI_BLOCK_SIZE;
int mi_col = sb_col_index * MI_BLOCK_SIZE;
int qindex_thresh =
cpi->oxcf.content == VP9E_CONTENT_SCREEN
? vp9_get_qindex(&cm->seg, CR_SEGMENT_ID_BOOST2, cm->base_qindex)
: 0;
vp9_get_qindex(&cm->seg, CR_SEGMENT_ID_BOOST2, cm->base_qindex);
int consec_zero_mv_thresh =
cpi->oxcf.content == VP9E_CONTENT_SCREEN ? 0
: 10 * (100 / cr->percent_refresh);
assert(mi_row >= 0 && mi_row < cm->mi_rows);
assert(mi_col >= 0 && mi_col < cm->mi_cols);
bl_index = mi_row * cm->mi_cols + mi_col;
@ -398,7 +434,8 @@ static void cyclic_refresh_update_map(VP9_COMP *const cpi) {
// for possible boost/refresh (segment 1). The segment id may get
// reset to 0 later if block gets coded anything other than ZEROMV.
if (cr->map[bl_index2] == 0) {
if (cr->last_coded_q_map[bl_index2] > qindex_thresh)
if (cr->last_coded_q_map[bl_index2] > qindex_thresh ||
cr->consec_zero_mv[bl_index2] < consec_zero_mv_thresh)
sum_map++;
} else if (cr->map[bl_index2] < 0) {
cr->map[bl_index2]++;
@ -475,6 +512,8 @@ void vp9_cyclic_refresh_setup(VP9_COMP *const cpi) {
if (cm->frame_type == KEY_FRAME) {
memset(cr->last_coded_q_map, MAXQ,
cm->mi_rows * cm->mi_cols * sizeof(*cr->last_coded_q_map));
memset(cr->consec_zero_mv, 0,
cm->mi_rows * cm->mi_cols * sizeof(*cr->consec_zero_mv));
cr->sb_index = 0;
}
return;
@ -544,6 +583,8 @@ void vp9_cyclic_refresh_reset_resize(VP9_COMP *const cpi) {
const VP9_COMMON *const cm = &cpi->common;
CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
memset(cr->map, 0, cm->mi_rows * cm->mi_cols);
memset(cr->last_coded_q_map, MAXQ, cm->mi_rows * cm->mi_cols);
memset(cr->consec_zero_mv, 0, cm->mi_rows * cm->mi_cols);
cr->sb_index = 0;
cpi->refresh_golden_frame = 1;
}

7
vp9/encoder/vp9_aq_cyclicrefresh.h
View File

@ -51,6 +51,8 @@ struct CYCLIC_REFRESH {
signed char *map;
// Map of the last q a block was coded at.
uint8_t *last_coded_q_map;
// Count on how many consecutive times a block uses ZER0MV for encoding.
uint8_t *consec_zero_mv;
// Thresholds applied to the projected rate/distortion of the coding block,
// when deciding whether block should be refreshed.
int64_t thresh_rate_sb;
@ -92,6 +94,11 @@ void vp9_cyclic_refresh_update_segment(struct VP9_COMP *const cpi,
int mi_row, int mi_col, BLOCK_SIZE bsize,
int64_t rate, int64_t dist, int skip);
void vp9_cyclic_refresh_update_sb_postencode(struct VP9_COMP *const cpi,
const MB_MODE_INFO *const mbmi,
int mi_row, int mi_col,
BLOCK_SIZE bsize);
// Update the segmentation map, and related quantities: cyclic refresh map,
// refresh sb_index, and target number of blocks to be refreshed.
void vp9_cyclic_refresh_update__map(struct VP9_COMP *const cpi);

2
vp9/encoder/vp9_encodeframe.c
View File

@ -4213,5 +4213,7 @@ static void encode_superblock(VP9_COMP *cpi, ThreadData *td,
}
++td->counts->tx.tx_totals[mbmi->tx_size];
++td->counts->tx.tx_totals[get_uv_tx_size(mbmi, &xd->plane[1])];
if (cm->seg.enabled && cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ)
vp9_cyclic_refresh_update_sb_postencode(cpi, mbmi, mi_row, mi_col, bsize);
}
}