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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_ATTRIBUTE_DECODER_H_
#define DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_ATTRIBUTE_DECODER_H_
#include "draco/compression/attributes/prediction_schemes/prediction_scheme_interface.h"
#include "draco/compression/point_cloud/point_cloud_decoder.h"
#include "draco/draco_features.h"
namespace draco {
// A base class for decoding attribute values encoded by the
// SequentialAttributeEncoder.
class SequentialAttributeDecoder {
public:
SequentialAttributeDecoder();
virtual ~SequentialAttributeDecoder() = default;
virtual bool Init(PointCloudDecoder *decoder, int attribute_id);
// Initialization for a specific attribute. This can be used mostly for
// standalone decoding of an attribute without an PointCloudDecoder.
virtual bool InitializeStandalone(PointAttribute *attribute);
// Performs lossless decoding of the portable attribute data.
virtual bool DecodePortableAttribute(const std::vector<PointIndex> &point_ids,
DecoderBuffer *in_buffer);
// Decodes any data needed to revert portable transform of the decoded
// attribute.
virtual bool DecodeDataNeededByPortableTransform(
const std::vector<PointIndex> &point_ids, DecoderBuffer *in_buffer);
// Reverts transformation performed by encoder in
// SequentialAttributeEncoder::TransformAttributeToPortableFormat() method.
virtual bool TransformAttributeToOriginalFormat(
const std::vector<PointIndex> &point_ids);
const PointAttribute *GetPortableAttribute();
const PointAttribute *attribute() const { return attribute_; }
PointAttribute *attribute() { return attribute_; }
int attribute_id() const { return attribute_id_; }
PointCloudDecoder *decoder() const { return decoder_; }
protected:
// Should be used to initialize newly created prediction scheme.
// Returns false when the initialization failed (in which case the scheme
// cannot be used).
virtual bool InitPredictionScheme(PredictionSchemeInterface *ps);
// The actual implementation of the attribute decoding. Should be overridden
// for specialized decoders.
virtual bool DecodeValues(const std::vector<PointIndex> &point_ids,
DecoderBuffer *in_buffer);
void SetPortableAttribute(std::unique_ptr<PointAttribute> att) {
portable_attribute_ = std::move(att);
}
PointAttribute *portable_attribute() { return portable_attribute_.get(); }
private:
PointCloudDecoder *decoder_;
PointAttribute *attribute_;
int attribute_id_;
// Storage for decoded portable attribute (after lossless decoding).
std::unique_ptr<PointAttribute> portable_attribute_;
};
} // namespace draco
#endif // DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_ATTRIBUTE_DECODER_H_
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