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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_ENCODERS_CONTROLLER_H_
#define DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_ATTRIBUTE_ENCODERS_CONTROLLER_H_
#include "draco/compression/attributes/attributes_encoder.h"
#include "draco/compression/attributes/points_sequencer.h"
#include "draco/compression/attributes/sequential_attribute_encoder.h"
namespace draco {
// A basic implementation of an attribute encoder that can be used to encode
// an arbitrary set of attributes. The encoder creates a sequential attribute
// encoder for each encoded attribute (see sequential_attribute_encoder.h) and
// then it encodes all attribute values in an order defined by a point sequence
// generated in the GeneratePointSequence() method. The default implementation
// generates a linear sequence of all points, but derived classes can generate
// any custom sequence.
class SequentialAttributeEncodersController : public AttributesEncoder {
public:
explicit SequentialAttributeEncodersController(
std::unique_ptr<PointsSequencer> sequencer);
SequentialAttributeEncodersController(
std::unique_ptr<PointsSequencer> sequencer, int point_attrib_id);
bool Init(PointCloudEncoder *encoder, const PointCloud *pc) override;
bool EncodeAttributesEncoderData(EncoderBuffer *out_buffer) override;
bool EncodeAttributes(EncoderBuffer *buffer) override;
uint8_t GetUniqueId() const override { return BASIC_ATTRIBUTE_ENCODER; }
int NumParentAttributes(int32_t point_attribute_id) const override {
const int32_t loc_id = GetLocalIdForPointAttribute(point_attribute_id);
if (loc_id < 0) {
return 0;
}
return sequential_encoders_[loc_id]->NumParentAttributes();
}
int GetParentAttributeId(int32_t point_attribute_id,
int32_t parent_i) const override {
const int32_t loc_id = GetLocalIdForPointAttribute(point_attribute_id);
if (loc_id < 0) {
return -1;
}
return sequential_encoders_[loc_id]->GetParentAttributeId(parent_i);
}
bool MarkParentAttribute(int32_t point_attribute_id) override {
const int32_t loc_id = GetLocalIdForPointAttribute(point_attribute_id);
if (loc_id < 0) {
return false;
}
// Mark the attribute encoder as parent (even when if it is not created
// yet).
if (sequential_encoder_marked_as_parent_.size() <= loc_id) {
sequential_encoder_marked_as_parent_.resize(loc_id + 1, false);
}
sequential_encoder_marked_as_parent_[loc_id] = true;
if (sequential_encoders_.size() <= loc_id) {
return true; // Sequential encoders not generated yet.
}
sequential_encoders_[loc_id]->MarkParentAttribute();
return true;
}
const PointAttribute *GetPortableAttribute(
int32_t point_attribute_id) override {
const int32_t loc_id = GetLocalIdForPointAttribute(point_attribute_id);
if (loc_id < 0) {
return nullptr;
}
return sequential_encoders_[loc_id]->GetPortableAttribute();
}
protected:
bool TransformAttributesToPortableFormat() override;
bool EncodePortableAttributes(EncoderBuffer *out_buffer) override;
bool EncodeDataNeededByPortableTransforms(EncoderBuffer *out_buffer) override;
// Creates all sequential encoders (one for each attribute associated with the
// encoder).
virtual bool CreateSequentialEncoders();
// Create a sequential encoder for a given attribute based on the attribute
// type
// and the provided encoder options.
virtual std::unique_ptr<SequentialAttributeEncoder> CreateSequentialEncoder(
int i);
private:
std::vector<std::unique_ptr<SequentialAttributeEncoder>> sequential_encoders_;
// Flag for each sequential attribute encoder indicating whether it was marked
// as parent attribute or not.
std::vector<bool> sequential_encoder_marked_as_parent_;
std::vector<PointIndex> point_ids_;
std::unique_ptr<PointsSequencer> sequencer_;
};
} // namespace draco
#endif // DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_ATTRIBUTE_ENCODERS_CONTROLLER_H_
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