ref: cdd40d1cd042d8c139b3426f311b8b5722d696bb
parent: cc55568fef1f08d033dc9bd7a080f7d77a4a53ca
author: Marco Paniconi <marpan@google.com>
date: Mon Apr 15 11:59:49 EDT 2019
vp9-rtc: tx_size selection for intra mode in nonrd In nonrd_pickmode for intra modes: add tx_size selection based on Y prediction signal for the bsize. The tx selection is done in model_rd, same as inter-modes. Existing code for intra mode was first setting a tx_size based only on the bsize, and then in some cases in block_yrd (during the loop over bsize in units of tx_size) the tx_size may be set again if model_rd is called in block_yrd. This CL separates out the tx_size setting (based on Y channel prediction via model_rd), and then block_yrd is called once for whole bsize. This allows for better tuning of the tx selection for intra modes in future change. Adjust threshold in svc datarate test. Negligible/neutral change in psnr/ssim metrics for speed 7 and 8, 1 layer and SVC mode. Change-Id: I33bc8447afdc3785482e13aac5c3636e13c59644
--- a/test/svc_datarate_test.cc
+++ b/test/svc_datarate_test.cc
@@ -937,7 +937,7 @@
layer_framedrop_ = GET_PARAM(2);
AssignLayerBitrates();
ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
- CheckLayerRateTargeting(number_spatial_layers_, number_temporal_layers_, 0.65,
+ CheckLayerRateTargeting(number_spatial_layers_, number_temporal_layers_, 0.64,
1.45);
#if CONFIG_VP9_DECODER
// The non-reference frames are expected to be mismatched frames as the
--- a/vp9/encoder/vp9_pickmode.c
+++ b/vp9/encoder/vp9_pickmode.c
@@ -349,6 +349,7 @@
static TX_SIZE calculate_tx_size(VP9_COMP *const cpi, BLOCK_SIZE bsize,
MACROBLOCKD *const xd, unsigned int var,
unsigned int sse, int64_t ac_thr) {+ // TODO(marpan): Tune selection for intra-modes, screen content, etc.
TX_SIZE tx_size;
if (cpi->common.tx_mode == TX_MODE_SELECT) {if (sse > (var << 2))
@@ -356,13 +357,11 @@
tx_mode_to_biggest_tx_size[cpi->common.tx_mode]);
else
tx_size = TX_8X8;
-
- if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ &&
+ if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && var > 0 &&
cyclic_refresh_segment_id_boosted(xd->mi[0]->segment_id))
tx_size = TX_8X8;
- else if (tx_size > TX_16X16)
+ else if (tx_size > TX_16X16 && var > 0)
tx_size = TX_16X16;
-
// For screen-content force 4X4 tx_size over 8X8, for large variance.
if (cpi->oxcf.content == VP9E_CONTENT_SCREEN && tx_size == TX_8X8 &&
bsize <= BLOCK_16X16 && var > (ac_thr << 6))
@@ -371,10 +370,52 @@
tx_size = VPXMIN(max_txsize_lookup[bsize],
tx_mode_to_biggest_tx_size[cpi->common.tx_mode]);
}
-
return tx_size;
}
+static void compute_intra_yprediction(PREDICTION_MODE mode, BLOCK_SIZE bsize,
+ MACROBLOCK *x, MACROBLOCKD *xd) {+ struct macroblockd_plane *const pd = &xd->plane[0];
+ struct macroblock_plane *const p = &x->plane[0];
+ uint8_t *const src_buf_base = p->src.buf;
+ uint8_t *const dst_buf_base = pd->dst.buf;
+ const int src_stride = p->src.stride;
+ const int dst_stride = pd->dst.stride;
+ // block and transform sizes, in number of 4x4 blocks log 2 ("*_b")+ // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8
+ const TX_SIZE tx_size = max_txsize_lookup[bsize];
+ const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];
+ const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];
+ int row, col;
+ // If mb_to_right_edge is < 0 we are in a situation in which
+ // the current block size extends into the UMV and we won't
+ // visit the sub blocks that are wholly within the UMV.
+ const int max_blocks_wide =
+ num_4x4_w + (xd->mb_to_right_edge >= 0
+ ? 0
+ : xd->mb_to_right_edge >> (5 + pd->subsampling_x));
+ const int max_blocks_high =
+ num_4x4_h + (xd->mb_to_bottom_edge >= 0
+ ? 0
+ : xd->mb_to_bottom_edge >> (5 + pd->subsampling_y));
+
+ // Keep track of the row and column of the blocks we use so that we know
+ // if we are in the unrestricted motion border.
+ for (row = 0; row < max_blocks_high; row += (1 << tx_size)) {+ // Skip visiting the sub blocks that are wholly within the UMV.
+ for (col = 0; col < max_blocks_wide; col += (1 << tx_size)) {+ p->src.buf = &src_buf_base[4 * (row * src_stride + col)];
+ pd->dst.buf = &dst_buf_base[4 * (row * dst_stride + col)];
+ vp9_predict_intra_block(xd, b_width_log2_lookup[bsize], tx_size, mode,
+ x->skip_encode ? p->src.buf : pd->dst.buf,
+ x->skip_encode ? src_stride : dst_stride,
+ pd->dst.buf, dst_stride, col, row, 0);
+ }
+ }
+ p->src.buf = src_buf_base;
+ pd->dst.buf = dst_buf_base;
+}
+
static void model_rd_for_sb_y_large(VP9_COMP *cpi, BLOCK_SIZE bsize,
MACROBLOCK *x, MACROBLOCKD *xd,
int *out_rate_sum, int64_t *out_dist_sum,
@@ -1016,7 +1057,6 @@
if (plane == 0) {int64_t this_sse = INT64_MAX;
- // TODO(jingning): This needs further refactoring.
block_yrd(cpi, x, &this_rdc, &args->skippable, &this_sse, bsize_tx,
VPXMIN(tx_size, TX_16X16), 0);
} else {@@ -2291,7 +2331,6 @@
this_sse = (int64_t)sse_y;
block_yrd(cpi, x, &this_rdc, &is_skippable, &this_sse, bsize,
VPXMIN(mi->tx_size, TX_16X16), rd_computed);
-
x->skip_txfm[0] = is_skippable;
if (is_skippable) {this_rdc.rate = vp9_cost_bit(vp9_get_skip_prob(cm, xd), 1);
@@ -2466,13 +2505,12 @@
bsize <= cpi->sf.max_intra_bsize && !x->skip_low_source_sad &&
!x->lowvar_highsumdiff)) { struct estimate_block_intra_args args = { cpi, x, DC_PRED, 1, 0 };+ int64_t this_sse = INT64_MAX;
int i;
PRED_BUFFER *const best_pred = best_pickmode.best_pred;
TX_SIZE intra_tx_size =
VPXMIN(max_txsize_lookup[bsize],
tx_mode_to_biggest_tx_size[cpi->common.tx_mode]);
- if (cpi->oxcf.content != VP9E_CONTENT_SCREEN && intra_tx_size > TX_16X16)
- intra_tx_size = TX_16X16;
if (reuse_inter_pred && best_pred != NULL) { if (best_pred->data == orig_dst.buf) {@@ -2533,8 +2571,13 @@
args.skippable = 1;
args.rdc = &this_rdc;
mi->tx_size = intra_tx_size;
- vp9_foreach_transformed_block_in_plane(xd, bsize, 0, estimate_block_intra,
- &args);
+
+ compute_intra_yprediction(this_mode, bsize, x, xd);
+ model_rd_for_sb_y(cpi, bsize, x, xd, &this_rdc.rate, &this_rdc.dist,
+ &var_y, &sse_y);
+ block_yrd(cpi, x, &this_rdc, &args.skippable, &this_sse, bsize,
+ VPXMIN(mi->tx_size, TX_16X16), 1);
+
// Check skip cost here since skippable is not set for for uv, this
// mirrors the behavior used by inter
if (args.skippable) {