libvpx: Pull from upstream

source/libvpx/vp8/encoder/pickinter.c

Index: source/libvpx/vp8/encoder/pickinter.c
===================================================================
--- source/libvpx/vp8/encoder/pickinter.c	(revision 292608)
+++ source/libvpx/vp8/encoder/pickinter.c	(working copy)
@@ -516,9 +516,8 @@
     // Adjust rd for ZEROMV and LAST, if LAST is the closest reference frame.
     if (this_mode == ZEROMV &&
         x->e_mbd.mode_info_context->mbmi.ref_frame == LAST_FRAME &&
-        (denoise_aggressive || cpi->closest_reference_frame == LAST_FRAME))
-    {
-        this_rd = ((int64_t)this_rd) * rd_adj / 100;
+        (denoise_aggressive || cpi->closest_reference_frame == LAST_FRAME)) {
+      this_rd = ((int64_t)this_rd) * rd_adj / 100;
     }
 
     check_for_encode_breakout(*sse, x);
@@ -1083,7 +1082,14 @@
         {
 
             /* Store for later use by denoiser. */
-            if (this_mode == ZEROMV && sse < zero_mv_sse )
+            // Dont' denoise with GOLDEN OR ALTREF is they are old reference
+            // frames (greater than MAX_GF_ARF_DENOISE_RANGE frames in past).
+            int skip_old_reference = ((this_ref_frame != LAST_FRAME) &&
+                (cpi->common.current_video_frame -
+                 cpi->current_ref_frames[this_ref_frame] >
+                 MAX_GF_ARF_DENOISE_RANGE)) ? 1 : 0;
+            if (this_mode == ZEROMV && sse < zero_mv_sse &&
+                !skip_old_reference)
             {
                 zero_mv_sse = sse;
                 x->best_zeromv_reference_frame =
@@ -1092,7 +1098,7 @@
 
             /* Store the best NEWMV in x for later use in the denoiser. */
             if (x->e_mbd.mode_info_context->mbmi.mode == NEWMV &&
-                    sse < best_sse)
+                sse < best_sse && !skip_old_reference)
             {
                 best_sse = sse;
                 x->best_sse_inter_mode = NEWMV;