shithub: libvpx

Download patch

ref: 44473e7eb9cd8a83fba8f68604e371b03237423d
parent: 05302360c989f078524f40b5cbdd57863238e739
author: paulwilkins <paulwilkins@google.com>
date: Thu Nov 16 11:15:06 EST 2017

Disable allow_partition_search_skip for speed 2.

When allow_partition_search_skip  is set the two pass code
can optionally skip the partition search in the rd loop if the image
appears static (based on selection of 0,0 motion).

Unfortunately 0,0 motion does not necessarily mean that there are
no meaningful changes or that motion or intra modes will not be selected
in the second pass.

Disabling "allow_partition_search_skip" may hurt the encode speed a little
for a small number of clips but can have a big impact on compression.
The most notable example of this in our test sets is "bridge_close_cif"
where this change gives a gains of 18%, 12% and 16% in opsnr, ssim and
psnr-hvs.

Change-Id: I765e288b5c0cd82bce00a148e7653a21e9203024

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

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

@@ -245,7 +245,6 @@

     sf->disable_filter_search_var_thresh = 100;

     sf->comp_inter_joint_search_thresh = BLOCK_SIZES;

     sf->auto_min_max_partition_size = RELAXED_NEIGHBORING_MIN_MAX;

-    sf->allow_partition_search_skip = 1;

     sf->recode_tolerance_low = 15;

     sf->recode_tolerance_high = 45;

@@ -276,6 +275,7 @@

     sf->intra_y_mode_mask[TX_32X32] = INTRA_DC;

     sf->intra_uv_mode_mask[TX_32X32] = INTRA_DC;

     sf->adaptive_interp_filter_search = 1;

+    sf->allow_partition_search_skip = 1;

     if (cpi->twopass.fr_content_type == FC_GRAPHICS_ANIMATION) {

       for (i = 0; i < MAX_MESH_STEP; ++i) {