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diff --git a/extern/draco/draco/src/draco/metadata/metadata_encoder.h b/extern/draco/draco/src/draco/metadata/metadata_encoder.h
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+// Copyright 2017 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_METADATA_METADATA_ENCODER_H_
+#define DRACO_METADATA_METADATA_ENCODER_H_
+
+#include "draco/core/encoder_buffer.h"
+#include "draco/metadata/geometry_metadata.h"
+#include "draco/metadata/metadata.h"
+
+namespace draco {
+
+// Class for encoding metadata. It could encode either base Metadata class or
+// a metadata of a geometry, e.g. a point cloud.
+class MetadataEncoder {
+ public:
+  MetadataEncoder() {}
+
+  bool EncodeGeometryMetadata(EncoderBuffer *out_buffer,
+                              const GeometryMetadata *metadata);
+  bool EncodeMetadata(EncoderBuffer *out_buffer, const Metadata *metadata);
+
+ private:
+  bool EncodeAttributeMetadata(EncoderBuffer *out_buffer,
+                               const AttributeMetadata *metadata);
+  bool EncodeString(EncoderBuffer *out_buffer, const std::string &str);
+};
+}  // namespace draco
+
+#endif  // DRACO_METADATA_METADATA_ENCODER_H_