Correctly calculate SSE for high bitdepth in skip mode

Port from jianle@'s finding in AVM.

Quality changes:
Test setting: speed 1, VBR mode, 150 frames.

                  ovr_psnr    ssim    vmaf
lowres_bd10       -0.61      -0.57   -0.82
midres_bd10       -0.17      -0.15    0.14
jvet10b240p       -0.26      -0.19   -0.01
jvet10b480p       -0.59      -0.82   -0.94
jvet10b720p       -0.20      -0.18   -0.13

Change-Id: Ie78beed990059ecf6f5f9ad2ab88a0b19ba22589

av1/encoder/rdopt.c

diff --git a/av1/encoder/rdopt.c b/av1/encoder/rdopt.c
index c346c92..d64c93b 100644
--- a/av1/encoder/rdopt.c
+++ b/av1/encoder/rdopt.c
@@ -1648,6 +1648,7 @@
 
     av1_subtract_plane(x, plane_bsize, plane);
     int64_t sse = aom_sum_squares_2d_i16(p->src_diff, bw, bw, bh) << 4;
+    sse >>= ((cpi->frame_info.bit_depth - 8) * 2);
     total_sse += sse;
   }
   const int skip_mode_ctx = av1_get_skip_mode_context(xd);

test/external_frame_buffer_test.cc

diff --git a/test/external_frame_buffer_test.cc b/test/external_frame_buffer_test.cc
index b060ee3..96a3ab7 100644
--- a/test/external_frame_buffer_test.cc
+++ b/test/external_frame_buffer_test.cc
@@ -24,8 +24,6 @@
 
 namespace {
 
-const int kVideoNameParam = 1;
-
 struct ExternalFrameBuffer {
   uint8_t *data;
   size_t size;
@@ -398,6 +396,8 @@
 #endif  // CONFIG_WEBM_IO
 
 #if !CONFIG_REALTIME_ONLY
+const int kVideoNameParam = 1;
+
 // This test runs through the set of test vectors, and decodes them.
 // Libaom will call into the application to allocate a frame buffer when
 // needed. The md5 checksums are computed for each frame in the video file.

test/metadata_test.cc

diff --git a/test/metadata_test.cc b/test/metadata_test.cc
index b7b7f14..757a097 100644
--- a/test/metadata_test.cc
+++ b/test/metadata_test.cc
@@ -30,12 +30,11 @@
   0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17
 };
 
+#if CONFIG_AV1_ENCODER && !CONFIG_REALTIME_ONLY
 const size_t kMetadataPayloadSizeCll = 4;
 const uint8_t kMetadataPayloadCll[kMetadataPayloadSizeCll] = { 0xB5, 0x01, 0x02,
                                                                0x03 };
 
-#if CONFIG_AV1_ENCODER && !CONFIG_REALTIME_ONLY
-
 const size_t kMetadataObuSizeT35 = 28;
 const uint8_t kMetadataObuT35[kMetadataObuSizeT35] = {
   0x2A, 0x1A, 0x02, 0xB5, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,

test/resize_test.cc

diff --git a/test/resize_test.cc b/test/resize_test.cc
index 68d6101..6dd1267 100644
--- a/test/resize_test.cc
+++ b/test/resize_test.cc
@@ -249,10 +249,10 @@
   }
 }
 
+#if !CONFIG_REALTIME_ONLY
 const unsigned int kStepDownFrame = 3;
 const unsigned int kStepUpFrame = 6;
 
-#if !CONFIG_REALTIME_ONLY
 class ResizeInternalTestLarge : public ResizeTest {
  protected:
 #if WRITE_COMPRESSED_STREAM