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[ibc] Add IBC Flag context and code the bits, disable by default for now

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This commit is contained in:
Marko Viitanen 2022-06-27 07:36:54 +03:00
parent 20d0a9b65e
commit 6ec4c37b47
3 changed files with 37 additions and 1 deletions
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1
src/cabac.h
View file

@ -122,6 +122,7 @@ typedef struct
cabac_ctx_t transform_skip_gt2[5];
cabac_ctx_t cclm_flag;
cabac_ctx_t cclm_model;
cabac_ctx_t ibc_flag[3];
} ctx;
} cabac_data_t;

8
src/context.c
View file

@ -423,6 +423,13 @@ static const uint8_t INIT_CCLM_MODEL[4] = {
9,
};
static const uint8_t INIT_IBC_FLAG[4][3] = {
{ 0, 43, 45, },
{ 0, 57, 44, },
{ 17, 42, 36, },
{ 1, 5, 8, },
};
/*
static const uint16_t g_inistateToCount[128] = {
614, 647, 681, 718, 756, 797, 839, 884, 932, 982, 1034, 1089, 1148, 1209, 1274, 1342,
@ -514,6 +521,7 @@ void uvg_init_contexts(encoder_state_t *state, int8_t QP, int8_t slice)
uvg_ctx_init(&cabac->ctx.lfnst_idx_model[i], QP, INIT_LFNST_IDX[slice][i], INIT_LFNST_IDX[3][i]);
uvg_ctx_init(&cabac->ctx.transform_skip_sig_coeff_group[i], QP, INIT_TRANSFORM_SKIP_SIG_COEFF_GROUP[slice][i], INIT_TRANSFORM_SKIP_SIG_COEFF_GROUP[3][i]);
uvg_ctx_init(&cabac->ctx.transform_skip_sig[i], QP, INIT_TRANSFORM_SKIP_SIG[slice][i], INIT_TRANSFORM_SKIP_SIG[3][i]);
uvg_ctx_init(&cabac->ctx.ibc_flag[i], QP, INIT_IBC_FLAG[slice][i], INIT_IBC_FLAG[3][i]);
}
for (i = 0; i < 4; i++) {

29
src/encode_coding_tree.c
View file

@ -1555,7 +1555,7 @@ void uvg_encode_coding_tree(
}
// Encode skip flag
if (state->frame->slicetype != UVG_SLICE_I && cu_width != 4) {
if ((state->frame->slicetype != UVG_SLICE_I || state->encoder_control->cfg.ibc) && cu_width != 4) {
int8_t ctx_skip = 0;
@ -1570,6 +1570,15 @@ void uvg_encode_coding_tree(
CABAC_BIN(cabac, cur_cu->skipped, "SkipFlag");
if (cur_cu->skipped) {
if (state->encoder_control->cfg.ibc) { // ToDo: Only for luma channel
// ToDo: Disable for blocks over 64x64 pixels
int8_t ctx_ibc = 0;
if (left_cu && left_cu->type == CU_IBC) ctx_ibc++;
if (above_cu && above_cu->type == CU_IBC) ctx_ibc++;
cabac->cur_ctx = &(cabac->ctx.ibc_flag[ctx_ibc]);
CABAC_BIN(cabac, (cur_cu->type == CU_IBC), "IBCFlag");
}
DBG_PRINT_MV(state, x, y, (uint32_t)cu_width, (uint32_t)cu_width, cur_cu);
uvg_hmvp_add_mv(state, x, y, (uint32_t)cu_width, (uint32_t)cu_width, cur_cu);
int16_t num_cand = state->encoder_control->cfg.max_merge;
@ -1597,6 +1606,15 @@ void uvg_encode_coding_tree(
}
// Prediction mode
if (state->frame->slicetype == UVG_SLICE_I && state->encoder_control->cfg.ibc) { // ToDo: Only for luma channel
// ToDo: Disable for blocks over 64x64 pixels
int8_t ctx_ibc = 0;
if (left_cu && left_cu->type == CU_IBC) ctx_ibc++;
if (above_cu && above_cu->type == CU_IBC) ctx_ibc++;
cabac->cur_ctx = &(cabac->ctx.ibc_flag[ctx_ibc]);
CABAC_BIN(cabac, (cur_cu->type == CU_IBC), "IBCFlag");
}
if (state->frame->slicetype != UVG_SLICE_I && cu_width != 4) {
int8_t ctx_predmode = 0;
@ -1607,6 +1625,15 @@ void uvg_encode_coding_tree(
cabac->cur_ctx = &(cabac->ctx.cu_pred_mode_model[ctx_predmode]);
CABAC_BIN(cabac, (cur_cu->type == CU_INTRA), "PredMode");
// We need IBC flag if the mode is signalled as Inter
if (state->encoder_control->cfg.ibc && cur_cu->type != CU_INTRA) {
int8_t ctx_ibc = 0;
if (left_cu && left_cu->type == CU_IBC) ctx_ibc++;
if (above_cu && above_cu->type == CU_IBC) ctx_ibc++;
cabac->cur_ctx = &(cabac->ctx.ibc_flag[ctx_ibc]);
CABAC_BIN(cabac, (cur_cu->type == CU_IBC), "IBCFlag");
}
}
// part_mode