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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_NORMAL_ATTRIBUTE_DECODER_H_
#define DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_NORMAL_ATTRIBUTE_DECODER_H_
#include "draco/compression/attributes/prediction_schemes/prediction_scheme_decoder_factory.h"
#include "draco/compression/attributes/prediction_schemes/prediction_scheme_normal_octahedron_canonicalized_decoding_transform.h"
#include "draco/compression/attributes/prediction_schemes/prediction_scheme_normal_octahedron_decoding_transform.h"
#include "draco/compression/attributes/sequential_integer_attribute_decoder.h"
#include "draco/draco_features.h"
namespace draco {
// Decoder for attributes encoded with SequentialNormalAttributeEncoder.
class SequentialNormalAttributeDecoder
: public SequentialIntegerAttributeDecoder {
public:
SequentialNormalAttributeDecoder();
bool Init(PointCloudDecoder *decoder, int attribute_id) override;
protected:
int32_t GetNumValueComponents() const override {
return 2; // We quantize everything into two components.
}
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;
private:
int32_t quantization_bits_;
std::unique_ptr<PredictionSchemeTypedDecoderInterface<int32_t>>
CreateIntPredictionScheme(
PredictionSchemeMethod method,
PredictionSchemeTransformType transform_type) override {
switch (transform_type) {
#ifdef DRACO_BACKWARDS_COMPATIBILITY_SUPPORTED
case PREDICTION_TRANSFORM_NORMAL_OCTAHEDRON: {
typedef PredictionSchemeNormalOctahedronDecodingTransform<int32_t>
Transform;
// At this point the decoder has not read the quantization bits,
// which is why we must construct the transform by default.
// See Transform.DecodeTransformData for more details.
return CreatePredictionSchemeForDecoder<int32_t, Transform>(
method, attribute_id(), decoder());
}
#endif
case PREDICTION_TRANSFORM_NORMAL_OCTAHEDRON_CANONICALIZED: {
typedef PredictionSchemeNormalOctahedronCanonicalizedDecodingTransform<
int32_t>
Transform;
// At this point the decoder has not read the quantization bits,
// which is why we must construct the transform by default.
// See Transform.DecodeTransformData for more details.
return CreatePredictionSchemeForDecoder<int32_t, Transform>(
method, attribute_id(), decoder());
}
default:
return nullptr; // Currently, we support only octahedron transform and
// octahedron transform canonicalized.
}
}
};
} // namespace draco
#endif // DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_NORMAL_ATTRIBUTE_DECODER_H_
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