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Commit bbcd8f76 authored by Angie Chiang's avatar Angie Chiang
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Reduce division operations in update_scan_prob 

Change-Id: I923931a9dbf828eb13670511852d55c953b479c1
parent 92acb81b
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Showing with 4 additions and 3 deletions
av1/common/scan.c
View file @ bbcd8f76
......@@ -8208,11 +8208,12 @@ static void update_scan_prob(AV1_COMMON *cm, TX_SIZE tx_size, TX_TYPE tx_type,
}
#endif
int i;
const int inv_precision = 30;
int32_t inv_block_num = block_num == 0 ? 0 : (1 << inv_precision) / block_num;
for (i = 0; i < tx2d_size; i++) {
int64_t curr_prob =
block_num == 0
? 0
: (non_zero_count[i] << ADAPT_SCAN_PROB_PRECISION) / block_num;
block_num == 0 ? 0 : ((non_zero_count[i] * inv_block_num) >>
(inv_precision - ADAPT_SCAN_PROB_PRECISION));
int64_t prev_prob = prev_non_zero_prob[i];
int64_t pred_prob =
(curr_prob * rate +
......
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