shithub: libvpx

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Allow codec to skip temporal filter for intermediate ARFs

Allow the encoder to skip temporal filter for intermediate ARFs
that are later used in show_existing_frame mode.

Change-Id: Ieed635bf7672b62f5c287bde43765f80362a345e

--- a/vp9/encoder/vp9_temporal_filter.c

+++ b/vp9/encoder/vp9_temporal_filter.c

@@ -783,6 +783,7 @@

 static void adjust_arnr_filter(VP9_COMP *cpi, int distance, int group_boost,

                                int *arnr_frames, int *arnr_strength) {

   const VP9EncoderConfig *const oxcf = &cpi->oxcf;

+  const GF_GROUP *const gf_group = &cpi->twopass.gf_group;

   const int frames_after_arf =

       vp9_lookahead_depth(cpi->lookahead) - distance - 1;

   int frames_fwd = (cpi->oxcf.arnr_max_frames - 1) >> 1;

@@ -836,12 +837,15 @@

   }

   // Adjustments for second level arf in multi arf case.

-  if (cpi->oxcf.pass == 2 && cpi->multi_arf_allowed) {

-    const GF_GROUP *const gf_group = &cpi->twopass.gf_group;

-    if (gf_group->rf_level[gf_group->index] != GF_ARF_STD) {

-      strength >>= 1;

-    }

-  }

+  if (cpi->oxcf.pass == 2 && cpi->multi_arf_allowed)

+    if (gf_group->rf_level[gf_group->index] != GF_ARF_STD) strength >>= 1;

+

+  // TODO(jingning): Skip temporal filtering for intermediate frames that will

+  // be used as show_existing_frame. Need to further explore the possibility to

+  // apply certain filter.

+  if (gf_group->arf_src_offset[gf_group->index] <

+      cpi->rc.baseline_gf_interval - 1)

+    frames = 1;

   *arnr_frames = frames;

   *arnr_strength = strength;