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vp9-svc: Fix to disable cyclic refresh on key superframes.

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Cyclic refresh is disabled on key frames, but we did not
disable it for for spatial layers whose base is a key frame
(i.e., on a key-superframe).

This fix means generally somewhat lower frame-level QP will be
used for those spatial layers whose base is a key frame,
which will generally mean little better quality for the
key-superframes.

Change-Id: Idf090651aa2f5856fb6696c89198a9f6d5d50280
This commit is contained in:
Marco Paniconi 2018-04-05 15:54:17 -07:00
parent ac4dc51027
commit a4e453f668
1 changed files with 2 additions and 0 deletions
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2
vp9/encoder/vp9_aq_cyclicrefresh.c
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@ -428,6 +428,8 @@ void vp9_cyclic_refresh_update_parameters(VP9_COMP *const cpi) {
int thresh_low_motion = (cm->width < 720) ? 55 : 20;
cr->apply_cyclic_refresh = 1;
if (cm->frame_type == KEY_FRAME || cpi->svc.temporal_layer_id > 0 ||
(cpi->use_svc &&
cpi->svc.layer_context[cpi->svc.temporal_layer_id].is_key_frame) ||
(!cpi->use_svc && rc->avg_frame_low_motion < thresh_low_motion &&
rc->frames_since_key > 40)) {
cr->apply_cyclic_refresh = 0;