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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.
//
#include "draco/compression/attributes/sequential_attribute_decoders_controller.h"
#include "draco/compression/attributes/sequential_normal_attribute_decoder.h"
#include "draco/compression/attributes/sequential_quantization_attribute_decoder.h"
#include "draco/compression/config/compression_shared.h"
namespace draco {
SequentialAttributeDecodersController::SequentialAttributeDecodersController(
std::unique_ptr<PointsSequencer> sequencer)
: sequencer_(std::move(sequencer)) {}
bool SequentialAttributeDecodersController::DecodeAttributesDecoderData(
DecoderBuffer *buffer) {
if (!AttributesDecoder::DecodeAttributesDecoderData(buffer))
return false;
// Decode unique ids of all sequential encoders and create them.
const int32_t num_attributes = GetNumAttributes();
sequential_decoders_.resize(num_attributes);
for (int i = 0; i < num_attributes; ++i) {
uint8_t decoder_type;
if (!buffer->Decode(&decoder_type))
return false;
// Create the decoder from the id.
sequential_decoders_[i] = CreateSequentialDecoder(decoder_type);
if (!sequential_decoders_[i])
return false;
if (!sequential_decoders_[i]->Init(GetDecoder(), GetAttributeId(i)))
return false;
}
return true;
}
bool SequentialAttributeDecodersController::DecodeAttributes(
DecoderBuffer *buffer) {
if (!sequencer_ || !sequencer_->GenerateSequence(&point_ids_))
return false;
// Initialize point to attribute value mapping for all decoded attributes.
const int32_t num_attributes = GetNumAttributes();
for (int i = 0; i < num_attributes; ++i) {
PointAttribute *const pa =
GetDecoder()->point_cloud()->attribute(GetAttributeId(i));
if (!sequencer_->UpdatePointToAttributeIndexMapping(pa))
return false;
}
return AttributesDecoder::DecodeAttributes(buffer);
}
bool SequentialAttributeDecodersController::DecodePortableAttributes(
DecoderBuffer *in_buffer) {
const int32_t num_attributes = GetNumAttributes();
for (int i = 0; i < num_attributes; ++i) {
if (!sequential_decoders_[i]->DecodePortableAttribute(point_ids_,
in_buffer))
return false;
}
return true;
}
bool SequentialAttributeDecodersController::
DecodeDataNeededByPortableTransforms(DecoderBuffer *in_buffer) {
const int32_t num_attributes = GetNumAttributes();
for (int i = 0; i < num_attributes; ++i) {
if (!sequential_decoders_[i]->DecodeDataNeededByPortableTransform(
point_ids_, in_buffer))
return false;
}
return true;
}
bool SequentialAttributeDecodersController::
TransformAttributesToOriginalFormat() {
const int32_t num_attributes = GetNumAttributes();
for (int i = 0; i < num_attributes; ++i) {
// Check whether the attribute transform should be skipped.
if (GetDecoder()->options()) {
const PointAttribute *const attribute =
sequential_decoders_[i]->attribute();
const PointAttribute *const portable_attribute =
sequential_decoders_[i]->GetPortableAttribute();
if (portable_attribute &&
GetDecoder()->options()->GetAttributeBool(
attribute->attribute_type(), "skip_attribute_transform", false)) {
// Attribute transform should not be performed. In this case, we replace
// the output geometry attribute with the portable attribute.
// TODO(ostava): We can potentially avoid this copy by introducing a new
// mechanism that would allow to use the final attributes as portable
// attributes for predictors that may need them.
sequential_decoders_[i]->attribute()->CopyFrom(*portable_attribute);
continue;
}
}
if (!sequential_decoders_[i]->TransformAttributeToOriginalFormat(
point_ids_))
return false;
}
return true;
}
std::unique_ptr<SequentialAttributeDecoder>
SequentialAttributeDecodersController::CreateSequentialDecoder(
uint8_t decoder_type) {
switch (decoder_type) {
case SEQUENTIAL_ATTRIBUTE_ENCODER_GENERIC:
return std::unique_ptr<SequentialAttributeDecoder>(
new SequentialAttributeDecoder());
case SEQUENTIAL_ATTRIBUTE_ENCODER_INTEGER:
return std::unique_ptr<SequentialAttributeDecoder>(
new SequentialIntegerAttributeDecoder());
case SEQUENTIAL_ATTRIBUTE_ENCODER_QUANTIZATION:
return std::unique_ptr<SequentialAttributeDecoder>(
new SequentialQuantizationAttributeDecoder());
case SEQUENTIAL_ATTRIBUTE_ENCODER_NORMALS:
return std::unique_ptr<SequentialNormalAttributeDecoder>(
new SequentialNormalAttributeDecoder());
default:
break;
}
// Unknown or unsupported decoder type.
return nullptr;
}
} // namespace draco
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