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