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Disable early exit based on distortion in lossless

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In lossless coding, distortion is always 0. Early exit based on this
metric was incorrect.

This CL also changed to use best_rd instead of distortion as the metric
for easly exit as requested by Jim.

Change-Id: I8ef3e407ac03b4abc3283b273f936a68fad5c2ab
This commit is contained in:
Yaowu Xu
2013-12-05 13:41:18 -08:00
parent 6df9ec52a0
commit f8c06fb2ac
1 changed files with 4 additions and 2 deletions
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6
vp9/encoder/vp9_encodeframe.c
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@@ -1640,7 +1640,8 @@ static void rd_pick_partition(VP9_COMP *cpi, const TileInfo *const tile,
}
sum_rd = RDCOST(x->rdmult, x->rddiv, this_rate, this_dist);
if (sum_rd < best_rd) {
int64_t stop_thresh = 2048;
int64_t stop_thresh = 4096;
int64_t stop_thresh_rd;
best_rate = this_rate;
best_dist = this_dist;
@@ -1652,9 +1653,10 @@ static void rd_pick_partition(VP9_COMP *cpi, const TileInfo *const tile,
stop_thresh >>= 8 - (b_width_log2_lookup[bsize] +
b_height_log2_lookup[bsize]);
stop_thresh_rd = RDCOST(x->rdmult, x->rddiv, 0, stop_thresh);
// If obtained distortion is very small, choose current partition
// and stop splitting.
if (this_dist < stop_thresh) {
if (!x->e_mbd.lossless && best_rd < stop_thresh_rd) {
do_split = 0;
do_rect = 0;
}