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Optimize coef update

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1. move the check of search method of USE_TX_8X8 up one level to
avoid operations of build_tree_distributions()
2. count tx used and avoid computaton for coef udpate when one size
is not used at all.

Change-Id: Ia3e54a2588aa531c41377a1bfaa64385d04a592c
This commit is contained in:
Yaowu Xu 2015-01-29 10:22:48 -08:00
parent a80dd52b6e
commit 45971abd1d
3 changed files with 15 additions and 9 deletions
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1
vp9/common/vp9_entropymode.h
View File

@ -33,6 +33,7 @@ struct tx_counts {
unsigned int p32x32[TX_SIZE_CONTEXTS][TX_SIZES];
unsigned int p16x16[TX_SIZE_CONTEXTS][TX_SIZES - 1];
unsigned int p8x8[TX_SIZE_CONTEXTS][TX_SIZES - 2];
unsigned int tx_totals[TX_SIZES];
};
typedef struct frame_contexts {

17
vp9/encoder/vp9_bitstream.c
View File

@ -611,10 +611,6 @@ static void update_coef_probs_common(vp9_writer* const bc, VP9_COMP *cpi,
case ONE_LOOP_REDUCED: {
int updates = 0;
int noupdates_before_first = 0;
if (tx_size >= TX_16X16 && cpi->sf.tx_size_search_method == USE_TX_8X8) {
vp9_write_bit(bc, 0);
return;
}
for (i = 0; i < PLANE_TYPES; ++i) {
for (j = 0; j < REF_TYPES; ++j) {
for (k = 0; k < COEF_BANDS; ++k) {
@ -678,10 +674,15 @@ static void update_coef_probs(VP9_COMP *cpi, vp9_writer* w) {
for (tx_size = TX_4X4; tx_size <= max_tx_size; ++tx_size) {
vp9_coeff_stats frame_branch_ct[PLANE_TYPES];
vp9_coeff_probs_model frame_coef_probs[PLANE_TYPES];
build_tree_distribution(cpi, tx_size, frame_branch_ct,
frame_coef_probs);
update_coef_probs_common(w, cpi, tx_size, frame_branch_ct,
frame_coef_probs);
if (cpi->td.counts->tx.tx_totals[tx_size] == 0 ||
(tx_size >= TX_16X16 && cpi->sf.tx_size_search_method == USE_TX_8X8)) {
vp9_write_bit(w, 0);
} else {
build_tree_distribution(cpi, tx_size, frame_branch_ct,
frame_coef_probs);
update_coef_probs_common(w, cpi, tx_size, frame_branch_ct,
frame_coef_probs);
}
}
}

6
vp9/encoder/vp9_encodeframe.c
View File

@ -3805,6 +3805,9 @@ void vp9_encode_frame(VP9_COMP *cpi) {
}
}
vpx_memset(cpi->td.counts->tx.tx_totals, 0,
sizeof(cpi->td.counts->tx.tx_totals));
if (cpi->sf.frame_parameter_update) {
int i;
@ -3891,7 +3894,6 @@ void vp9_encode_frame(VP9_COMP *cpi) {
count16x16_lp += counts->tx.p32x32[i][TX_16X16];
count32x32 += counts->tx.p32x32[i][TX_32X32];
}
if (count4x4 == 0 && count16x16_lp == 0 && count16x16_16x16p == 0 &&
count32x32 == 0) {
cm->tx_mode = ALLOW_8X8;
@ -4015,5 +4017,7 @@ static void encode_superblock(VP9_COMP *cpi, ThreadData *td,
if (mi_col + x < cm->mi_cols && mi_row + y < cm->mi_rows)
mi_8x8[mis * y + x].src_mi->mbmi.tx_size = tx_size;
}
++td->counts->tx.tx_totals[mbmi->tx_size];
++td->counts->tx.tx_totals[get_uv_tx_size(mbmi, &xd->plane[1])];
}
}