Commit 0607abc3 authored by Yunqing Wang's avatar Yunqing Wang
Browse files

Stop partition checking when distortion is small

If the current obtained distortion is very small, which happens
for static image case, we pick the current partition type without
further split checking.

This won't affect regular videos. For static videos, we got 10%~12%
encoding speed gain. PSNR was better for some clips, and worse for
others. Overall it was even.

Change-Id: If787a57bedf46fc595ca4f5ded2b0c0a69e9fdef
parent f6bc783d
......@@ -1790,11 +1790,24 @@ static void rd_pick_partition(VP9_COMP *cpi, TOKENEXTRA **tp, int mi_row,
sum_rd = RDCOST(x->rdmult, x->rddiv, this_rate, this_dist);
if (sum_rd < best_rd) {
int64_t stop_thresh = 2048;
best_rate = this_rate;
best_dist = this_dist;
best_rd = sum_rd;
if (bsize >= BLOCK_8X8)
*(get_sb_partitioning(x, bsize)) = bsize;
// Adjust threshold according to partition size.
stop_thresh >>= 8 - (b_width_log2_lookup[bsize] +
// If obtained distortion is very small, choose current partition
// and stop splitting.
if (this_dist < stop_thresh) {
do_split = 0;
do_rect = 0;
restore_context(cpi, mi_row, mi_col, a, l, sa, sl, bsize);
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