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[intra] Perform intra chroma search before the mode is selected

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This commit is contained in:
Joose Sainio 2022-06-07 10:19:45 +03:00
parent 4dba21ea54
commit 882b00068b
4 changed files with 52 additions and 43 deletions
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1
src/encode_coding_tree.c
View file

@ -747,6 +747,7 @@ static void encode_transform_coeff(encoder_state_t * const state,
&& (depth != 4 || only_chroma)
&& state->encoder_control->cfg.jccr
) {
assert(cur_pu->joint_cb_cr < 4 && "JointCbCr is in search state.");
cabac->cur_ctx = &cabac->ctx.joint_cb_cr[cb_flag_u * 2 + cb_flag_v - 1];
CABAC_BIN(cabac, cur_pu->joint_cb_cr != 0, "tu_joint_cbcr_residual_flag");
}

4
src/intra.c
View file

@ -1576,7 +1576,7 @@ void uvg_intra_recon_cu(
}
} else {
const bool has_luma = mode_luma != -1;
const bool has_chroma = mode_chroma != -1 && (x % 8 == 0 && y % 8 == 0);
const bool has_chroma = mode_chroma != -1 && (x % 8 == 0 && y % 8 == 0);
// Process a leaf TU.
if (has_luma) {
@ -1588,7 +1588,7 @@ void uvg_intra_recon_cu(
}
uvg_quantize_lcu_residual(state, has_luma, has_chroma && !(search_data->pred_cu.joint_cb_cr & 3),
search_data->pred_cu.joint_cb_cr != 4 && state->encoder_control->cfg.jccr && (x % 8 == 0 && y % 8 == 0),
search_data->pred_cu.joint_cb_cr & 3 && state->encoder_control->cfg.jccr && has_chroma,
x, y, depth, cur_cu, lcu, false);
}
}

88
src/search.c
View file

@ -854,7 +854,49 @@ static double search_cu(encoder_state_t * const state, int x, int y, int depth,
intra_cost += pred_mode_type_bits * state->lambda;
}
#endif
if (intra_search.cost < cost) {
double intra_cost = intra_search.cost;
if (intra_cost < cost) {
int8_t intra_mode = intra_search.pred_cu.intra.mode;
if(state->encoder_control->cfg.cclm) {
intra_search.pred_cu.intra.mode_chroma = -1;
uvg_intra_recon_cu(state,
x, y,
depth, &intra_search,
&intra_search.pred_cu,
lcu);
downsample_cclm_rec(
state, x, y, cu_width / 2, cu_width / 2, lcu->rec.y, lcu->left_ref.y[64]
);
}
intra_search.pred_cu.joint_cb_cr = 0;
// TODO: This heavily relies to square CUs
if ((depth != 4 || (x % 8 && y % 8)) && state->encoder_control->chroma_format != KVZ_CSP_400) {
// There is almost no benefit to doing the chroma mode search for
// rd2. Possibly because the luma mode search already takes chroma
// into account, so there is less of a chanse of luma mode being
// really bad for chroma.
intra_search.pred_cu.intra.mode_chroma = intra_search.pred_cu.intra.mode;
if (ctrl->cfg.rdo >= 3) {
uvg_search_cu_intra_chroma(state, x, y, depth, lcu, &intra_search);
if (intra_search.pred_cu.joint_cb_cr == 0) {
intra_search.pred_cu.joint_cb_cr = 4;
}
}
else if (!intra_search.pred_cu.intra.mip_flag) {
intra_search.pred_cu.intra.mode_chroma = intra_search.pred_cu.intra.mode;
}
else {
intra_search.pred_cu.intra.mode_chroma = 0;
}
}
intra_search.pred_cu.intra.mode = intra_mode;
intra_cost += intra_search.cost;
}
if (intra_cost < cost) {
cost = intra_search.cost;
*cur_cu = intra_search.pred_cu;
cur_cu->type = CU_INTRA;
@ -866,53 +908,19 @@ static double search_cu(encoder_state_t * const state, int x, int y, int depth,
if (cur_cu->type == CU_INTRA) {
assert(cur_cu->part_size == SIZE_2Nx2N || cur_cu->part_size == SIZE_NxN);
intra_search.pred_cu.intra.mode_chroma = -1; // don't reconstruct chroma before search is performed for it
if ((depth == 4 && (x % 8 == 0 || y % 8 == 0)) || state->encoder_control->chroma_format == KVZ_CSP_400) {
intra_search.pred_cu.intra.mode_chroma = -1;
}
lcu_fill_cu_info(lcu, x_local, y_local, cu_width, cu_width, cur_cu);
uvg_intra_recon_cu(state,
x, y,
depth, &intra_search,
NULL,
lcu);
if (cur_cu->joint_cb_cr == 4) cur_cu->joint_cb_cr = 0;
lcu_fill_cu_info(lcu, x_local, y_local, cu_width, cu_width, cur_cu);
downsample_cclm_rec(
state, x, y, cu_width / 2, cu_width / 2, lcu->rec.y, lcu->left_ref.y[64]
);
cur_cu->joint_cb_cr = 0;
// TODO: This heavily relies to square CUs
if ((depth != 4 || (x % 8 && y % 8)) && state->encoder_control->chroma_format != UVG_CSP_400) {
// There is almost no benefit to doing the chroma mode search for
// rd2. Possibly because the luma mode search already takes chroma
// into account, so there is less of a chanse of luma mode being
// really bad for chroma.
intra_search.pred_cu.intra.mode_chroma = cur_cu->intra.mode; // skip luma
if (ctrl->cfg.rdo >= 3) {
cur_cu->intra.mode_chroma = uvg_search_cu_intra_chroma(state, x, y, depth, lcu, &intra_search);
if (intra_search.pred_cu.joint_cb_cr == 0) {
intra_search.pred_cu.joint_cb_cr = 4;
cur_cu->tr_skip |= intra_search.pred_cu.tr_skip;
}
else cur_cu->joint_cb_cr = intra_search.pred_cu.joint_cb_cr;
lcu_fill_cu_info(lcu, x_local, y_local, cu_width, cu_width, cur_cu);
}
else if(!cur_cu->intra.mip_flag) {
cur_cu->intra.mode_chroma = cur_cu->intra.mode;
intra_search.pred_cu.intra.mode_chroma = cur_cu->intra.mode;
}
else {
cur_cu->intra.mode_chroma = 0;
intra_search.pred_cu.intra.mode_chroma = 0;
}
intra_search.pred_cu.intra.mode = -1; // skip luma
uvg_intra_recon_cu(state,
x, y, // TODO: as does this
depth, &intra_search,
NULL,
lcu);
}
} else if (cur_cu->type == CU_INTER) {
if (!cur_cu->skipped) {

2
src/search_intra.c
View file

@ -1488,7 +1488,7 @@ int8_t uvg_search_cu_intra_chroma(encoder_state_t * const state,
{
const vector2d_t lcu_px = { SUB_SCU(x_px), SUB_SCU(y_px) };
cu_info_t *cur_pu = LCU_GET_CU_AT_PX(lcu, lcu_px.x, lcu_px.y);
const cu_info_t *cur_pu = &search_data->pred_cu;
int8_t intra_mode = !cur_pu->intra.mip_flag ? cur_pu->intra.mode : 0;
int8_t modes[8] = { 0, 50, 18, 1, intra_mode, 81, 82, 83 };