shithub: libvpx

Download patch

ref: 10921403799d77756ddf378dc74a7842c0fd1260
parent: ebac8f3487592896040cfbd6c443bda1b37fd077
author: Yunqing Wang <[email protected]>
date: Fri Sep 5 11:44:52 EDT 2014

No longer use use_lastframe_partitioning speed feature

The speedup in rd_pick_partition() function makes it possible
to drop use_lastframe_partitioning feature. By doing that, we
achieve good PSNR gain with small speed loss. Also, this makes
encoding loop less complicated. The code cleanup patch will
follow.

Borg tests showed:
1. At speed 2,
   stdhd set: 0.201% PSNR gain, 0.133% SSIM gain;
   derf set:  0.262% PSNR gain, 0.276% SSIM gain.
2. At speed 3,
   stdhd set: 0.139% PSNR gain, 0.109% SSIM gain;
   derf set:  0.447% PSNR gain, 0.442% SSIM gain.

The average speed loss over selected test clips is within 1%
with the worst case of 4%.

Change-Id: Icfd2ded7869372b585a6972855d933b3d0280d90

--- a/vp9/encoder/vp9_speed_features.c

+++ b/vp9/encoder/vp9_speed_features.c

@@ -123,7 +123,6 @@

     sf->disable_filter_search_var_thresh = 100;

     sf->comp_inter_joint_search_thresh = BLOCK_SIZES;

     sf->auto_min_max_partition_size = CONSTRAIN_NEIGHBORING_MIN_MAX;

-    sf->use_lastframe_partitioning = LAST_FRAME_PARTITION_LOW_MOTION;

     sf->adjust_partitioning_from_last_frame = 1;

     if (MIN(cm->width, cm->height) >= 720)