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Remove unnecessary guards against 0 cost.

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This commit is contained in:
Ari Koivula 2013-10-18 14:42:50 +03:00
parent b1b45944a9
commit 2fa2098236
1 changed files with 8 additions and 21 deletions
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29
src/search.c
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@ -368,7 +368,6 @@ uint32_t search_best_mode(encoder_control *encoder,
uint32_t cost = 0;
uint32_t lambdaCost = (4 * g_lambda_cost[encoder->QP]) << 4; //<<5; //TODO: Correct cost calculation
// Split and search to max_depth
if (depth != MAX_INTRA_SEARCH_DEPTH) {
// Split blocks and remember to change x and y block positions
uint8_t change = 1 << (MAX_DEPTH - 1 - depth);
@ -377,37 +376,25 @@ uint32_t search_best_mode(encoder_control *encoder,
cost += search_best_mode(encoder, x_ctb, y_ctb + change, depth + 1);
cost += search_best_mode(encoder, x_ctb + change, y_ctb + change, depth + 1);
// We split if the cost is better (0 cost -> not checked)
if ( (encoder->in.cur_pic->slicetype == SLICE_I && depth < MIN_INTRA_SEARCH_DEPTH) ||
(cost != 0
&& (best_intra_cost != 0 && cost + lambdaCost < best_intra_cost)
&& (best_inter_cost != 0
&& cost + lambdaCost < best_inter_cost)))
// If search hasn't been peformed at all for this block, the cost will be
// max value, so it is safe to just compare costs. It just has to be made
// sure that no value overflows.
if (cost + lambdaCost < best_intra_cost && cost + lambdaCost < best_inter_cost)
{
// Set split to 1
best_cost = cost + lambdaCost;
} else if (best_inter_cost != 0 // Else, check if inter cost is smaller or the same as intra
&& (best_inter_cost <= best_intra_cost || best_intra_cost == 0)
&& encoder->in.cur_pic->slicetype != SLICE_I)
{
// Set split to 0 and mode to inter.mode
} else if (best_inter_cost <= best_intra_cost) {
inter_set_block(encoder->in.cur_pic, x_ctb, y_ctb, depth, cur_cu);
best_cost = best_inter_cost;
} else { // Else, dont split and recursively set block mode
// Set split to 0 and mode to intra.mode
} else {
intra_set_block_mode(encoder->in.cur_pic, x_ctb, y_ctb, depth,
cur_cu->intra.mode);
best_cost = best_intra_cost;
}
} else if (best_inter_cost != 0
&& (best_inter_cost <= best_intra_cost || best_intra_cost == 0)
&& encoder->in.cur_pic->slicetype != SLICE_I)
{
// Set split to 0 and mode to inter.mode
} else if (best_inter_cost <= best_intra_cost
&& encoder->in.cur_pic->slicetype != SLICE_I) {
inter_set_block(encoder->in.cur_pic, x_ctb, y_ctb, depth, cur_cu);
best_cost = best_inter_cost;
} else {
// Set split to 0 and mode to intra.mode
intra_set_block_mode(encoder->in.cur_pic, x_ctb, y_ctb, depth,
cur_cu->intra.mode);
best_cost = best_intra_cost;