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diff --git a/extern/draco/draco/src/draco/compression/attributes/sequential_quantization_attribute_decoder.h b/extern/draco/draco/src/draco/compression/attributes/sequential_quantization_attribute_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_ATTRIBUTES_SEQUENTIAL_QUANTIZATION_ATTRIBUTE_DECODER_H_
+#define DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_QUANTIZATION_ATTRIBUTE_DECODER_H_
+
+#include "draco/compression/attributes/sequential_integer_attribute_decoder.h"
+#include "draco/draco_features.h"
+
+namespace draco {
+
+// Decoder for attribute values encoded with the
+// SequentialQuantizationAttributeEncoder.
+class SequentialQuantizationAttributeDecoder
+    : public SequentialIntegerAttributeDecoder {
+ public:
+  SequentialQuantizationAttributeDecoder();
+  bool Init(PointCloudDecoder *decoder, int attribute_id) override;
+
+ protected:
+  bool DecodeIntegerValues(const std::vector<PointIndex> &point_ids,
+                           DecoderBuffer *in_buffer) override;
+  bool DecodeDataNeededByPortableTransform(
+      const std::vector<PointIndex> &point_ids,
+      DecoderBuffer *in_buffer) override;
+  bool StoreValues(uint32_t num_points) override;
+
+  // Decodes data necessary for dequantizing the encoded values.
+  virtual bool DecodeQuantizedDataInfo();
+
+  // Dequantizes all values and stores them into the output attribute.
+  virtual bool DequantizeValues(uint32_t num_values);
+
+ private:
+  // Max number of quantization bits used to encode each component of the
+  // attribute.
+  int32_t quantization_bits_;
+
+  std::unique_ptr<float[]> min_value_;
+  float max_value_dif_;
+};
+
+}  // namespace draco
+
+#endif  // DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_QUANTIZATION_ATTRIBUTE_DECODER_H_