Additional logging and disable speed feature for b:457951958

Add additional logging in av1_update_state(), and disable
a speed feature used in rd_use_partition(), for variance_partitioning
in realtmode, as speculative fix to the issue.

Bug: b:457951958
Change-Id: I61a7c8da1ebb87d3db0672b021c58cdf45d3f000

av1/encoder/encodeframe_utils.c

diff --git a/av1/encoder/encodeframe_utils.c b/av1/encoder/encodeframe_utils.c
index a509d8e..0dc7ef7 100644
--- a/av1/encoder/encodeframe_utils.c
+++ b/av1/encoder/encodeframe_utils.c
@@ -185,11 +185,17 @@
   struct macroblock_plane *const p = x->plane;
   struct macroblockd_plane *const pd = xd->plane;
   const MB_MODE_INFO *const mi = &ctx->mic;
+  if (ctx == NULL) {
+    aom_internal_error(cm->error, AOM_CODEC_ERROR,
+                       "ctx is NULL in av1_update_state: %d %d %d %d %d %d \n",
+                       cm->current_frame.frame_type, cm->width, cm->height,
+                       mi_col, mi_row, bsize);
+  }
   if (mi == NULL) {
     aom_internal_error(cm->error, AOM_CODEC_ERROR,
-                       "mi is NULL in av1_update_state: %d %d %d %d \n",
+                       "mi is NULL in av1_update_state: %d %d %d %d %d %d \n",
                        cm->current_frame.frame_type, cm->width, cm->height,
-                       bsize);
+                       mi_col, mi_row, bsize);
   }
   MB_MODE_INFO *const mi_addr = xd->mi[0];
   const struct segmentation *const seg = &cm->seg;

av1/encoder/speed_features.c

diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index 05e1718..bc0e198 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -2816,11 +2816,8 @@
 
   if (cpi->oxcf.mode == REALTIME) {
     if (speed >= 6) {
-      const int qindex_thresh = boosted ? 190 : (is_720p_or_larger ? 120 : 150);
-      sf->part_sf.adjust_var_based_rd_partitioning =
-          frame_is_intra_only(cm)
-              ? 0
-              : cm->quant_params.base_qindex > qindex_thresh;
+      // Disable this as speculative fix to issue: 457951958.
+      sf->part_sf.adjust_var_based_rd_partitioning = 0;
     }
     return;
   }