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[lfnst] Chroma transform data is no longer stored in top left block. Remove -4x-4 coordinate offset.

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siivonek 2022-04-22 13:47:09 +03:00 committed by Joose Sainio
parent 76947c4c41
commit de18eef956
1 changed files with 2 additions and 6 deletions
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8
src/encode_coding_tree.c
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@ -1659,18 +1659,14 @@ void uvg_encode_coding_tree(encoder_state_t * const state,
if (state->encoder_control->chroma_format != UVG_CSP_400 && depth == 4 && x % 8 && y % 8) {
encode_chroma_intra_cu(cabac, cur_cu, state->encoder_control->cfg.cclm);
// LFNST constraints must be reset here. Otherwise the left over values will interfere when calculating new constraints
// This is called only for bottom right 4x4 blocks. Coordinates must be shifted by -4 to point to correct chroma block
// Chroma related lfnst constraints are written to the top left block.
const int tmp_x = x - 4;
const int tmp_y = y - 4;
cu_info_t* tmp = kvz_cu_array_at(frame->cu_array, tmp_x, tmp_y);
cu_info_t* tmp = kvz_cu_array_at(frame->cu_array, x, y);
tmp->violates_lfnst_constrained[0] = false;
tmp->violates_lfnst_constrained[1] = false;
tmp->lfnst_last_scan_pos = false;
encode_transform_coeff(state, x, y, depth, 0, 0, 0, 1, coeff);
// Write LFNST only once for single tree structure
if (!lfnst_written || is_dual_tree) {
encode_lfnst_idx(state, cabac, tmp, tmp_x, tmp_y, depth, COLOR_UV, cu_width, cu_height);
encode_lfnst_idx(state, cabac, tmp, x, y, depth, COLOR_UV, cu_width, cu_height);
}
}
}