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diff --git a/src/dsp/cdef.inc b/src/dsp/cdef.inc
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+// Copyright 2020 The libgav1 Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Constants used for cdef implementations.
+// This will be included inside an anonymous namespace on files where these are
+// necessary.
+
+const int8_t (*const kCdefDirections)[2][2] = kCdefDirectionsPadded + 2;
+
+// Mirror values and pad to 16 elements.
+alignas(16) constexpr uint32_t kCdefDivisionTable[] = {
+    840, 420, 280, 210, 168, 140, 120, 105,
+    120, 140, 168, 210, 280, 420, 840, 0};
+
+// Used when calculating odd |cost[x]| values to mask off unwanted elements.
+// Holds elements 1 3 5 X 5 3 1 X
+alignas(16) constexpr uint32_t kCdefDivisionTableOdd[] = {420, 210, 140, 0,
+                                                          140, 210, 420, 0};