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Enable all-zero coeff block index for sub8x8 blk

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This commit makes zcoeff_blk cache the case where the entire block
is quantized to be zero (without applying zero-forcing) in the rate-
distortion optimization loop, and skip the forward DCT, quantization,
inverse DCT, and reconstruction process in the encode_block stage.

It now works for all the block sizes, including sub8x8 blocks.

Change-Id: I5ae60a9c436ba3637d11666733554bec4580ef98
This commit is contained in:
Jingning Han
2013-10-30 13:52:55 -07:00
parent 50c4026e93
commit 8c8381d543
2 changed files with 27 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
vp9/encoder/vp9_encodemb.c
View File

@@ -418,6 +418,7 @@ static void encode_block(int plane, int block, BLOCK_SIZE plane_bsize,
struct encode_b_args *const args = arg;
MACROBLOCK *const x = args->x;
MACROBLOCKD *const xd = &x->e_mbd;
struct optimize_ctx *const ctx = args->ctx;
struct macroblockd_plane *const pd = &xd->plane[plane];
const int raster_block = txfrm_block_to_raster_block(plane_bsize, tx_size,
block);
@@ -429,14 +430,18 @@ static void encode_block(int plane, int block, BLOCK_SIZE plane_bsize,
// TODO(jingning): per transformed block zero forcing only enabled for
// luma component. will integrate chroma components as well.
if (x->zcoeff_blk[tx_size][block] && plane == 0) {
int x, y;
pd->eobs[block] = 0;
txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
ctx->ta[plane][x] = 0;
ctx->tl[plane][y] = 0;
return;
}
vp9_xform_quant(plane, block, plane_bsize, tx_size, arg);
if (x->optimize)
vp9_optimize_b(plane, block, plane_bsize, tx_size, x, args->ctx);
vp9_optimize_b(plane, block, plane_bsize, tx_size, x, ctx);
if (x->skip_encode || pd->eobs[block] == 0)
return;

28
vp9/encoder/vp9_rdopt.c
View File

@@ -611,7 +611,7 @@ static void block_yrd_txfm(int plane, int block, BLOCK_SIZE plane_bsize,
// TODO(jingning): temporarily enabled only for luma component
rd = MIN(rd1, rd2);
if (plane == 0)
x->zcoeff_blk[tx_size][block] = rd1 > rd2;
x->zcoeff_blk[tx_size][block] = rd1 > rd2 || !xd->plane[plane].eobs[block];
args->this_rate += args->rate;
args->this_dist += args->dist;
@@ -1654,6 +1654,7 @@ static void rd_check_segment_txsize(VP9_COMP *cpi, MACROBLOCK *x,
MB_PREDICTION_MODE this_mode;
MODE_INFO *mi = x->e_mbd.mi_8x8[0];
MB_MODE_INFO *const mbmi = &mi->mbmi;
struct macroblockd_plane *const pd = &x->e_mbd.plane[0];
const int label_count = 4;
int64_t this_segment_rd = 0;
int label_mv_thresh;
@@ -1668,8 +1669,8 @@ static void rd_check_segment_txsize(VP9_COMP *cpi, MACROBLOCK *x,
int subpelmv = 1, have_ref = 0;
const int has_second_rf = has_second_ref(mbmi);
vpx_memcpy(t_above, x->e_mbd.plane[0].above_context, sizeof(t_above));
vpx_memcpy(t_left, x->e_mbd.plane[0].left_context, sizeof(t_left));
vpx_memcpy(t_above, pd->above_context, sizeof(t_above));
vpx_memcpy(t_left, pd->left_context, sizeof(t_left));
v_fn_ptr = &cpi->fn_ptr[bsize];
@@ -1747,7 +1748,7 @@ static void rd_check_segment_txsize(VP9_COMP *cpi, MACROBLOCK *x,
}
}
vpx_memcpy(orig_pre, x->e_mbd.plane[0].pre, sizeof(orig_pre));
vpx_memcpy(orig_pre, pd->pre, sizeof(orig_pre));
vpx_memcpy(bsi->rdstat[i][mode_idx].ta, t_above,
sizeof(bsi->rdstat[i][mode_idx].ta));
vpx_memcpy(bsi->rdstat[i][mode_idx].tl, t_left,
@@ -1951,6 +1952,13 @@ static void rd_check_segment_txsize(VP9_COMP *cpi, MACROBLOCK *x,
ref_bsi->rdstat[i][mode_idx].brdcost < INT64_MAX) {
vpx_memcpy(&bsi->rdstat[i][mode_idx], &ref_bsi->rdstat[i][mode_idx],
sizeof(SEG_RDSTAT));
if (num_4x4_blocks_wide > 1)
bsi->rdstat[i + 1][mode_idx].eobs =
ref_bsi->rdstat[i + 1][mode_idx].eobs;
if (num_4x4_blocks_high > 1)
bsi->rdstat[i + 2][mode_idx].eobs =
ref_bsi->rdstat[i + 2][mode_idx].eobs;
if (bsi->rdstat[i][mode_idx].brdcost < best_rd) {
mode_selected = this_mode;
best_rd = bsi->rdstat[i][mode_idx].brdcost;
@@ -1971,7 +1979,11 @@ static void rd_check_segment_txsize(VP9_COMP *cpi, MACROBLOCK *x,
bsi->rdstat[i][mode_idx].brdcost += RDCOST(x->rdmult, x->rddiv,
bsi->rdstat[i][mode_idx].brate, 0);
bsi->rdstat[i][mode_idx].brate += bsi->rdstat[i][mode_idx].byrate;
bsi->rdstat[i][mode_idx].eobs = x->e_mbd.plane[0].eobs[i];
bsi->rdstat[i][mode_idx].eobs = pd->eobs[i];
if (num_4x4_blocks_wide > 1)
bsi->rdstat[i + 1][mode_idx].eobs = pd->eobs[i + 1];
if (num_4x4_blocks_high > 1)
bsi->rdstat[i + 2][mode_idx].eobs = pd->eobs[i + 2];
}
if (bsi->rdstat[i][mode_idx].brdcost < best_rd) {
@@ -3831,7 +3843,7 @@ int64_t vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
int best_skip2 = 0;
x->skip_encode = cpi->sf.skip_encode_frame && xd->q_index < QIDX_SKIP_THRESH;
vp9_zero(x->zcoeff_blk);
vpx_memset(x->zcoeff_blk[TX_4X4], 0, 4);
for (i = 0; i < 4; i++) {
int j;
@@ -4131,8 +4143,10 @@ int64_t vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
tmp_best_sse = total_sse;
tmp_best_skippable = skippable;
tmp_best_mbmode = *mbmi;
for (i = 0; i < 4; i++)
for (i = 0; i < 4; i++) {
tmp_best_bmodes[i] = xd->mi_8x8[0]->bmi[i];
x->zcoeff_blk[TX_4X4][i] = !xd->plane[0].eobs[i];
}
pred_exists = 1;
if (switchable_filter_index == 0 &&
cpi->sf.use_rd_breakout &&