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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_ATTRIBUTES_DECODER_H_
#define DRACO_COMPRESSION_ATTRIBUTES_ATTRIBUTES_DECODER_H_
#include <vector>
#include "draco/draco_features.h"
#include "draco/compression/attributes/attributes_decoder_interface.h"
#include "draco/compression/point_cloud/point_cloud_decoder.h"
#include "draco/core/decoder_buffer.h"
#include "draco/point_cloud/point_cloud.h"
namespace draco {
// Base class for decoding one or more attributes that were encoded with a
// matching AttributesEncoder. It is a basic implementation of
// AttributesDecoderInterface that provides functionality that is shared between
// all AttributesDecoders.
class AttributesDecoder : public AttributesDecoderInterface {
public:
AttributesDecoder();
virtual ~AttributesDecoder() = default;
// Called after all attribute decoders are created. It can be used to perform
// any custom initialization.
bool Init(PointCloudDecoder *decoder, PointCloud *pc) override;
// Decodes any attribute decoder specific data from the |in_buffer|.
bool DecodeAttributesDecoderData(DecoderBuffer *in_buffer) override;
int32_t GetAttributeId(int i) const override {
return point_attribute_ids_[i];
}
int32_t GetNumAttributes() const override {
return static_cast<int32_t>(point_attribute_ids_.size());
}
PointCloudDecoder *GetDecoder() const override {
return point_cloud_decoder_;
}
// Decodes attribute data from the source buffer.
bool DecodeAttributes(DecoderBuffer *in_buffer) override {
if (!DecodePortableAttributes(in_buffer))
return false;
if (!DecodeDataNeededByPortableTransforms(in_buffer))
return false;
if (!TransformAttributesToOriginalFormat())
return false;
return true;
}
protected:
int32_t GetLocalIdForPointAttribute(int32_t point_attribute_id) const {
const int id_map_size =
static_cast<int>(point_attribute_to_local_id_map_.size());
if (point_attribute_id >= id_map_size)
return -1;
return point_attribute_to_local_id_map_[point_attribute_id];
}
virtual bool DecodePortableAttributes(DecoderBuffer *in_buffer) = 0;
virtual bool DecodeDataNeededByPortableTransforms(DecoderBuffer *in_buffer) {
return true;
}
virtual bool TransformAttributesToOriginalFormat() { return true; }
private:
// List of attribute ids that need to be decoded with this decoder.
std::vector<int32_t> point_attribute_ids_;
// Map between point attribute id and the local id (i.e., the inverse of the
// |point_attribute_ids_|.
std::vector<int32_t> point_attribute_to_local_id_map_;
PointCloudDecoder *point_cloud_decoder_;
PointCloud *point_cloud_;
};
} // namespace draco
#endif // DRACO_COMPRESSION_ATTRIBUTES_ATTRIBUTES_DECODER_H_
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