Enable intraframe partition pruning on midres

Performance:
         | AVG_PSNR | OVR_PSNR |   SSIM  |  AVG_SPD |  OVR_SPD
 KF-only |  +0.063% |  +0.063% | -0.037% | +27.286% | +37.605%
 33-frms |  +0.020% |  +0.022% | -0.010$ |  +1.528% |  +1.832%

STATS_CHANGED

Change-Id: I556838d9d4463f812fb1d949f448a05ec11bf244
diff --git a/av1/encoder/partition_cnn_weights.h b/av1/encoder/partition_cnn_weights.h
index 7a60f88..68d8c42 100644
--- a/av1/encoder/partition_cnn_weights.h
+++ b/av1/encoder/partition_cnn_weights.h
@@ -2090,27 +2090,19 @@
 #undef BRANCH_3_NUM_LOGITS
 
 static const float av1_intra_mode_cnn_partition_split_thresh_hdres[5] = {
-  1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
+  100.0f, 100.0f, 100.0f, 100.0f, 100.0f,
 };
 
 static const float av1_intra_mode_cnn_partition_no_split_thresh_hdres[5] = {
-  0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-};
-
-static const float av1_intra_mode_cnn_partition_no_rect_thresh_hdres[5] = {
-  0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
+  -100.0f, -100.0f, -100.0f, -100.0f, -100.0f,
 };
 
 static const float av1_intra_mode_cnn_partition_split_thresh_midres[5] = {
-  1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
+  100.000000f, 3.218737f, 2.657764f, 0.868458f, 2.454447f,
 };
 
 static const float av1_intra_mode_cnn_partition_no_split_thresh_midres[5] = {
-  0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-};
-
-static const float av1_intra_mode_cnn_partition_no_rect_thresh_midres[5] = {
-  0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
+  -100.000000f, -3.842426f, -4.005076f, -3.642994f, -2.467197f,
 };
 
 static const float av1_intra_mode_cnn_partition_split_thresh_lowres[5] = {
diff --git a/av1/encoder/partition_strategy.c b/av1/encoder/partition_strategy.c
index 070e8e9..c63dbae 100644
--- a/av1/encoder/partition_strategy.c
+++ b/av1/encoder/partition_strategy.c
@@ -48,7 +48,7 @@
 #if !CONFIG_REALTIME_ONLY
 // TODO(chiyotsai@google.com): This is very much a work in progress. We still
 // need to the following:
-//   -- add support for midres and hdres
+//   -- add support for hdres
 //   -- add support for pruning rectangular partitions
 //   -- use reconstructed pixels instead of source pixels for padding
 //   -- use chroma pixels in addition to luma pixels
diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index ff426ae..23befc0 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -123,6 +123,7 @@
       sf->use_square_partition_only_threshold = BLOCK_128X128;
     } else if (is_480p_or_larger) {
       sf->use_square_partition_only_threshold = BLOCK_64X64;
+      sf->intra_cnn_split = (speed == 1);
     } else {
       sf->use_square_partition_only_threshold = BLOCK_32X32;