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[mtt] Make sure mtt splits cannot reach a situation where search cannot be performed

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Joose Sainio 2022-12-14 10:41:36 +02:00 committed by Marko Viitanen
parent 23e6b9f56c
commit 71516b8155
1 changed files with 18 additions and 2 deletions
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20
src/search.c
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@ -1560,7 +1560,24 @@ static double search_cu(
}
bool can_split[6];
uvg_get_possible_splits(state, cu_loc, split_tree, tree_type, can_split);
bool is_implicit = uvg_get_possible_splits(state, cu_loc, split_tree, tree_type, can_split);
const int slice_type = state->frame->is_irap ? (tree_type == UVG_CHROMA_T ? 2 : 0) : 1;
const int max_btd = state->encoder_control->cfg.max_btt_depth[slice_type];
int minimum_split_amount;
switch (slice_type) {
case 0: minimum_split_amount = pu_depth_intra.min - split_tree.current_depth; break;
case 1: minimum_split_amount = MIN(pu_depth_intra.min, pu_depth_inter.min) - split_tree.current_depth; break;
case 2: minimum_split_amount = pu_depth_intra.min - split_tree.current_depth; break;
default:
assert(0 && "Incorrect_slice_type");
}
if(minimum_split_amount > max_btd && !is_implicit) {
// If search should not be performed at depths that cannot be reached after a maximum mtt split amount
// we are in trouble, therefore prevent mtt splits in such situation
can_split[2] = can_split[3] = can_split[4] = can_split[5] = false;
}
can_split_cu &= can_split[1] || can_split[2] || can_split[3] || can_split[4] || can_split[5];
@ -1588,7 +1605,6 @@ static double search_cu(
double split_bits = 0;
bool is_implicit = false;
if (cur_cu->log2_height + cur_cu->log2_width > 4) {