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