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Use rate/distortion thresholds to control non-RD partition search

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Compare the estimated rate and distortion to the thresholds scaled
according to the operating block size and determine if further
split partition search will be run. The compression performance of
speed -5 is changed by -0.074%. The encoding speed is 10% - 15%
faster.

vidyo1 720p
16545 b/f, 40.492 dB, 11475 ms -> 16535 b/f, 40.486 dB, 10100 ms

nik720p
16624 b/f, 36.310 dB, 10071 ms -> 16617 b/f, 36.313 dB, 8346 ms

Change-Id: Ic9197ab5761279ae55d2fb7813b2af0e0db497b8
This commit is contained in:
Jingning Han 2014-10-15 12:18:48 -07:00
parent 89b8c7a513
commit 5e766ccee0
2 changed files with 16 additions and 10 deletions
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20
vp9/encoder/vp9_encodeframe.c
View File

@ -2834,8 +2834,13 @@ static void nonrd_pick_partition(VP9_COMP *cpi, const TileInfo *const tile,
this_rate += cpi->partition_cost[pl][PARTITION_NONE];
sum_rd = RDCOST(x->rdmult, x->rddiv, this_rate, this_dist);
if (sum_rd < best_rd) {
int64_t stop_thresh = 4096;
int64_t stop_thresh_rd;
int dist_breakout_thr = sf->partition_search_breakout_dist_thr;
int64_t rate_breakout_thr = sf->partition_search_breakout_rate_thr;
dist_breakout_thr >>= 8 - (b_width_log2_lookup[bsize] +
b_height_log2_lookup[bsize]);
rate_breakout_thr *= num_pels_log2_lookup[bsize];
best_rate = this_rate;
best_dist = this_dist;
@ -2843,14 +2848,9 @@ static void nonrd_pick_partition(VP9_COMP *cpi, const TileInfo *const tile,
if (bsize >= BLOCK_8X8)
pc_tree->partitioning = PARTITION_NONE;
// Adjust threshold according to partition size.
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 (!x->e_mbd.lossless && best_rd < stop_thresh_rd) {
if (!x->e_mbd.lossless &&
this_rate < rate_breakout_thr &&
this_dist < dist_breakout_thr) {
do_split = 0;
do_rect = 0;
}

6
vp9/encoder/vp9_speed_features.c
View File

@ -275,6 +275,12 @@ static void set_rt_speed_feature(VP9_COMP *cpi, SPEED_FEATURES *sf,
sf->inter_mode_mask[BLOCK_32X64] = INTER_NEAREST_NEW_ZERO;
sf->inter_mode_mask[BLOCK_64X32] = INTER_NEAREST_NEW_ZERO;
sf->inter_mode_mask[BLOCK_64X64] = INTER_NEAREST_NEW_ZERO;
if (MIN(cm->width, cm->height) >= 720)
sf->partition_search_breakout_dist_thr = (1 << 25);
else
sf->partition_search_breakout_dist_thr = (1 << 23);
sf->partition_search_breakout_rate_thr = 200;
}
if (speed >= 6) {