shithub: libvpx

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vp9: Enforce intra search on scene_change

For real-time non-rd pickmode: force check of
intra modes on INTER frames for scene changes.
Reduces artifacts on scene changes.

Change-Id: I5ae80869072db156791ace554c0a470f3785e9c6

--- a/vp9/encoder/vp9_pickmode.c

+++ b/vp9/encoder/vp9_pickmode.c

@@ -1518,6 +1518,9 @@

   int svc_mv_row = 0;

   int no_scaling = 0;

   unsigned int thresh_svc_skip_golden = 500;

+  int scene_change_detected =

+      cpi->rc.high_source_sad ||

+      (cpi->use_svc && cpi->svc.high_source_sad_superframe);

   x->source_variance = UINT_MAX;

   if (cpi->sf.default_interp_filter == BILINEAR) {

     best_pred_filter = BILINEAR;

@@ -2328,6 +2331,7 @@

   // Perform intra prediction search, if the best SAD is above a certain

   // threshold.

   if (best_rdc.rdcost == INT64_MAX ||

+      (scene_change_detected && perform_intra_pred) ||

       ((!force_skip_low_temp_var || bsize < BLOCK_32X32 ||

         x->content_state_sb == kVeryHighSad) &&

        perform_intra_pred && !x->skip && best_rdc.rdcost > inter_mode_thresh &&