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59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
// Copyright 2016 The Draco Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_QUANTIZATION_ATTRIBUTE_ENCODER_H_
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#define DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_QUANTIZATION_ATTRIBUTE_ENCODER_H_
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#include "compression/attributes/sequential_integer_attribute_encoder.h"
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namespace draco {
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class MeshEncoder;
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// Attribute encoder that quantizes floating point attribute values. The
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// quantized values can be optionally compressed using an entropy coding.
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class SequentialQuantizationAttributeEncoder
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: public SequentialIntegerAttributeEncoder {
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public:
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SequentialQuantizationAttributeEncoder();
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uint8_t GetUniqueId() const override {
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return SEQUENTIAL_ATTRIBUTE_ENCODER_QUANTIZATION;
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}
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bool Initialize(PointCloudEncoder *encoder, int attribute_id) override;
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bool IsLossyEncoder() const override { return true; }
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protected:
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bool PrepareValues(const std::vector<PointIndex> &point_ids) override;
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bool PrepareLossyAttributeData() override;
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// Quantizes all values of the input attribute. Quantization behavior can be
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// changed by the derived classes.
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virtual bool QuantizeValues(const std::vector<PointIndex> &point_ids);
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private:
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// Computes quantization data when needed. The output is computed only once
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// even if the function is called multiple times (this can be reset only
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// by calling the Initialize() method).
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void ComputeQuantizationData();
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// Data that are needed by PrepareLossyAttributeData().
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float max_value_dif_;
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std::unique_ptr<float[]> min_value_;
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};
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} // namespace draco
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#endif // DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_QUANTIZATION_ATTRIBUTE_ENCODER_H_
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