1 files changed, 32 insertions, 0 deletions
diff --git a/src/dsp/obmc.inc b/src/dsp/obmc.inc
new file mode 100644
index 0000000..001c6ee
--- /dev/null
+++ b/src/dsp/obmc.inc
@@ -0,0 +1,32 @@
+// Copyright 2019 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 and utility functions used for overlap blend implementations.
+// This will be included inside an anonymous namespace on files where these are
+// necessary.
+
+// This is a flat array of masks for each block dimension from 2 to 32. The
+// starting index for each length is length-2.
+constexpr uint8_t kObmcMask[62] = {
+    // Obmc Mask 2
+    45, 64,
+    // Obmc Mask 4
+    39, 50, 59, 64,
+    // Obmc Mask 8
+    36, 42, 48, 53, 57, 61, 64, 64,
+    // Obmc Mask 16
+    34, 37, 40, 43, 46, 49, 52, 54, 56, 58, 60, 61, 64, 64, 64, 64,
+    // Obmc Mask 32
+    33, 35, 36, 38, 40, 41, 43, 44, 45, 47, 48, 50, 51, 52, 53, 55, 56, 57, 58,
+    59, 60, 60, 61, 62, 64, 64, 64, 64, 64, 64, 64, 64};