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diff --git a/extern/draco/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_decoder_interface.h b/extern/draco/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_decoder_interface.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_ATTRIBUTES_PREDICTION_SCHEMES_PREDICTION_SCHEME_DECODER_INTERFACE_H_
+#define DRACO_COMPRESSION_ATTRIBUTES_PREDICTION_SCHEMES_PREDICTION_SCHEME_DECODER_INTERFACE_H_
+
+#include "draco/compression/attributes/prediction_schemes/prediction_scheme_interface.h"
+#include "draco/core/decoder_buffer.h"
+
+// Prediction schemes can be used during encoding and decoding of attributes
+// to predict attribute values based on the previously encoded/decoded data.
+// See prediction_scheme.h for more details.
+namespace draco {
+
+// Abstract interface for all prediction schemes used during attribute encoding.
+class PredictionSchemeDecoderInterface : public PredictionSchemeInterface {
+ public:
+  // Method that can be used to decode any prediction scheme specific data
+  // from the input buffer.
+  virtual bool DecodePredictionData(DecoderBuffer *buffer) = 0;
+};
+
+// A specialized version of the prediction scheme interface for specific
+// input and output data types.
+// |entry_to_point_id_map| is the mapping between value entries to point ids
+// of the associated point cloud, where one entry is defined as |num_components|
+// values of the |in_data|.
+// DataTypeT is the data type of input and predicted values.
+// CorrTypeT is the data type used for storing corrected values.
+template <typename DataTypeT, typename CorrTypeT = DataTypeT>
+class PredictionSchemeTypedDecoderInterface
+    : public PredictionSchemeDecoderInterface {
+ public:
+  // Reverts changes made by the prediction scheme during encoding.
+  virtual bool ComputeOriginalValues(
+      const CorrTypeT *in_corr, DataTypeT *out_data, int size,
+      int num_components, const PointIndex *entry_to_point_id_map) = 0;
+};
+
+}  // namespace draco
+
+#endif  // DRACO_COMPRESSION_ATTRIBUTES_PREDICTION_SCHEMES_PREDICTION_SCHEME_DECODER_INTERFACE_H_