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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_POINT_CLOUD_POINT_CLOUD_DECODER_H_
#define DRACO_COMPRESSION_POINT_CLOUD_POINT_CLOUD_DECODER_H_
#include "draco/compression/attributes/attributes_decoder_interface.h"
#include "draco/compression/config/compression_shared.h"
#include "draco/compression/config/decoder_options.h"
#include "draco/core/status.h"
#include "draco/point_cloud/point_cloud.h"
namespace draco {
// Abstract base class for all point cloud and mesh decoders. It provides a
// basic functionality that is shared between different decoders.
class PointCloudDecoder {
public:
PointCloudDecoder();
virtual ~PointCloudDecoder() = default;
virtual EncodedGeometryType GetGeometryType() const { return POINT_CLOUD; }
// Decodes a Draco header int other provided |out_header|.
// Returns false on error.
static Status DecodeHeader(DecoderBuffer *buffer, DracoHeader *out_header);
// The main entry point for point cloud decoding.
Status Decode(const DecoderOptions &options, DecoderBuffer *in_buffer,
PointCloud *out_point_cloud);
bool SetAttributesDecoder(
int att_decoder_id, std::unique_ptr<AttributesDecoderInterface> decoder) {
if (att_decoder_id < 0) {
return false;
}
if (att_decoder_id >= static_cast<int>(attributes_decoders_.size())) {
attributes_decoders_.resize(att_decoder_id + 1);
}
attributes_decoders_[att_decoder_id] = std::move(decoder);
return true;
}
// Returns an attribute containing decoded data in their portable form that
// is guaranteed to be the same for both encoder and decoder. I.e., it returns
// an attribute before it was transformed back into its final form which may
// be slightly different (non-portable) across platforms. For example, for
// attributes encoded with quantization, this method returns an attribute
// that contains the quantized values (before the dequantization step).
const PointAttribute *GetPortableAttribute(int32_t point_attribute_id);
uint16_t bitstream_version() const {
return DRACO_BITSTREAM_VERSION(version_major_, version_minor_);
}
const AttributesDecoderInterface *attributes_decoder(int dec_id) {
return attributes_decoders_[dec_id].get();
}
int32_t num_attributes_decoders() const {
return static_cast<int32_t>(attributes_decoders_.size());
}
// Get a mutable pointer to the decoded point cloud. This is intended to be
// used mostly by other decoder subsystems.
PointCloud *point_cloud() { return point_cloud_; }
const PointCloud *point_cloud() const { return point_cloud_; }
DecoderBuffer *buffer() { return buffer_; }
const DecoderOptions *options() const { return options_; }
protected:
// Can be implemented by derived classes to perform any custom initialization
// of the decoder. Called in the Decode() method.
virtual bool InitializeDecoder() { return true; }
// Creates an attribute decoder.
virtual bool CreateAttributesDecoder(int32_t att_decoder_id) = 0;
virtual bool DecodeGeometryData() { return true; }
virtual bool DecodePointAttributes();
virtual bool DecodeAllAttributes();
virtual bool OnAttributesDecoded() { return true; }
Status DecodeMetadata();
private:
// Point cloud that is being filled in by the decoder.
PointCloud *point_cloud_;
std::vector<std::unique_ptr<AttributesDecoderInterface>> attributes_decoders_;
// Map between attribute id and decoder id.
std::vector<int32_t> attribute_to_decoder_map_;
// Input buffer holding the encoded data.
DecoderBuffer *buffer_;
// Bit-stream version of the encoder that encoded the input data.
uint8_t version_major_;
uint8_t version_minor_;
const DecoderOptions *options_;
};
} // namespace draco
#endif // DRACO_COMPRESSION_POINT_CLOUD_POINT_CLOUD_DECODER_H_
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