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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_quantization_attribute_encoder.h"
#include "draco/core/quantization_utils.h"
namespace draco {
SequentialQuantizationAttributeEncoder::
SequentialQuantizationAttributeEncoder() {}
bool SequentialQuantizationAttributeEncoder::Init(PointCloudEncoder *encoder,
int attribute_id) {
if (!SequentialIntegerAttributeEncoder::Init(encoder, attribute_id)) {
return false;
}
// This encoder currently works only for floating point attributes.
const PointAttribute *const attribute =
encoder->point_cloud()->attribute(attribute_id);
if (attribute->data_type() != DT_FLOAT32) {
return false;
}
// Initialize AttributeQuantizationTransform.
const int quantization_bits = encoder->options()->GetAttributeInt(
attribute_id, "quantization_bits", -1);
if (quantization_bits < 1) {
return false;
}
if (encoder->options()->IsAttributeOptionSet(attribute_id,
"quantization_origin") &&
encoder->options()->IsAttributeOptionSet(attribute_id,
"quantization_range")) {
// Quantization settings are explicitly specified in the provided options.
std::vector<float> quantization_origin(attribute->num_components());
encoder->options()->GetAttributeVector(attribute_id, "quantization_origin",
attribute->num_components(),
&quantization_origin[0]);
const float range = encoder->options()->GetAttributeFloat(
attribute_id, "quantization_range", 1.f);
attribute_quantization_transform_.SetParameters(
quantization_bits, quantization_origin.data(),
attribute->num_components(), range);
} else {
// Compute quantization settings from the attribute values.
if (!attribute_quantization_transform_.ComputeParameters(
*attribute, quantization_bits)) {
return false;
}
}
return true;
}
bool SequentialQuantizationAttributeEncoder::
EncodeDataNeededByPortableTransform(EncoderBuffer *out_buffer) {
return attribute_quantization_transform_.EncodeParameters(out_buffer);
}
bool SequentialQuantizationAttributeEncoder::PrepareValues(
const std::vector<PointIndex> &point_ids, int num_points) {
SetPortableAttribute(
attribute_quantization_transform_.GeneratePortableAttribute(
*(attribute()), point_ids, num_points));
return true;
}
} // namespace draco
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