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diff --git a/extern/draco/draco/src/draco/compression/mesh/mesh_decoder.h b/extern/draco/draco/src/draco/compression/mesh/mesh_decoder.h
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+// Copyright 2016 The Draco 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.
+//
+#ifndef DRACO_COMPRESSION_MESH_MESH_DECODER_H_
+#define DRACO_COMPRESSION_MESH_MESH_DECODER_H_
+
+#include "draco/compression/attributes/mesh_attribute_indices_encoding_data.h"
+#include "draco/compression/point_cloud/point_cloud_decoder.h"
+#include "draco/mesh/mesh.h"
+#include "draco/mesh/mesh_attribute_corner_table.h"
+
+namespace draco {
+
+// Class that reconstructs a 3D mesh from input data that was encoded by
+// MeshEncoder.
+class MeshDecoder : public PointCloudDecoder {
+ public:
+  MeshDecoder();
+
+  EncodedGeometryType GetGeometryType() const override {
+    return TRIANGULAR_MESH;
+  }
+
+  // The main entry point for mesh decoding.
+  Status Decode(const DecoderOptions &options, DecoderBuffer *in_buffer,
+                Mesh *out_mesh);
+
+  // Returns the base connectivity of the decoded mesh (or nullptr if it is not
+  // initialized).
+  virtual const CornerTable *GetCornerTable() const { return nullptr; }
+
+  // Returns the attribute connectivity data or nullptr if it does not exist.
+  virtual const MeshAttributeCornerTable *GetAttributeCornerTable(
+      int /* att_id */) const {
+    return nullptr;
+  }
+
+  // Returns the decoding data for a given attribute or nullptr when the data
+  // does not exist.
+  virtual const MeshAttributeIndicesEncodingData *GetAttributeEncodingData(
+      int /* att_id */) const {
+    return nullptr;
+  }
+
+  Mesh *mesh() const { return mesh_; }
+
+ protected:
+  bool DecodeGeometryData() override;
+  virtual bool DecodeConnectivity() = 0;
+
+ private:
+  Mesh *mesh_;
+};
+
+}  // namespace draco
+
+#endif  // DRACO_COMPRESSION_MESH_MESH_DECODER_H_