shithub: libvpx

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vp9-screen: Adjust speed features at speed 8

Keep loopfilter on, and use half-pel instead of full.
This reduces big quality gap between the speed 8 and 7,
but still keeps speed 8 about 30-40% faster than speed 7.
Tested on screenshare clips with scroll and slide changes.

Change-Id: Id63b44f59655f3e3dc1b49d89291d97e7323081a

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

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

@@ -720,8 +720,7 @@

     if (!frame_is_intra_only(cm) && cm->width * cm->height <= 352 * 288) {

       sf->nonrd_use_ml_partition = 1;

     }

-    if (content == VP9E_CONTENT_SCREEN) sf->mv.subpel_force_stop = FULL_PEL;

-    if (content == VP9E_CONTENT_SCREEN) sf->lpf_pick = LPF_PICK_MINIMAL_LPF;

+    if (content == VP9E_CONTENT_SCREEN) sf->mv.subpel_force_stop = HALF_PEL;

     // Only keep INTRA_DC mode for speed 8.

     if (!is_keyframe) {

       int i = 0;