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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/point_cloud/algorithms/float_points_tree_decoder.h"
#include <algorithm>
#include "draco/compression/point_cloud/algorithms/dynamic_integer_points_kd_tree_decoder.h"
#include "draco/compression/point_cloud/algorithms/quantize_points_3.h"
#include "draco/core/math_utils.h"
#include "draco/core/quantization_utils.h"
namespace draco {
struct Converter {
typedef std::vector<uint32_t> SourceType;
typedef Point3ui TargetType;
Point3ui operator()(const std::vector<uint32_t> &v) {
return Point3ui(v[0], v[1], v[2]);
}
};
// Output iterator that is used to decode values directly into the data buffer
// of the modified PointAttribute.
template <class OutputIterator, class Converter>
class ConversionOutputIterator {
typedef ConversionOutputIterator<OutputIterator, Converter> Self;
typedef typename Converter::SourceType SourceType;
typedef typename Converter::TargetType TargetType;
public:
explicit ConversionOutputIterator(OutputIterator oit) : oit_(oit) {}
const Self &operator++() {
++oit_;
return *this;
}
Self operator++(int) {
Self copy = *this;
++oit_;
return copy;
}
Self &operator*() { return *this; }
const Self &operator=(const SourceType &source) {
*oit_ = Converter()(source);
return *this;
}
private:
OutputIterator oit_;
};
FloatPointsTreeDecoder::FloatPointsTreeDecoder()
: num_points_(0), compression_level_(0), num_points_from_header_(0) {
qinfo_.quantization_bits = 0;
qinfo_.range = 0;
}
bool FloatPointsTreeDecoder::DecodePointCloudKdTreeInternal(
DecoderBuffer *buffer, std::vector<Point3ui> *qpoints) {
if (!buffer->Decode(&qinfo_.quantization_bits)) {
return false;
}
if (qinfo_.quantization_bits > 31) {
return false;
}
if (!buffer->Decode(&qinfo_.range)) {
return false;
}
if (!buffer->Decode(&num_points_)) {
return false;
}
if (num_points_from_header_ > 0 && num_points_ != num_points_from_header_) {
return false;
}
if (!buffer->Decode(&compression_level_)) {
return false;
}
// Only allow compression level in [0..6].
if (6 < compression_level_) {
DRACO_LOGE("FloatPointsTreeDecoder: compression level %i not supported.\n",
compression_level_);
return false;
}
std::back_insert_iterator<std::vector<Point3ui>> oit_qpoints =
std::back_inserter(*qpoints);
ConversionOutputIterator<std::back_insert_iterator<std::vector<Point3ui>>,
Converter>
oit(oit_qpoints);
if (num_points_ > 0) {
qpoints->reserve(num_points_);
switch (compression_level_) {
case 0: {
DynamicIntegerPointsKdTreeDecoder<0> qpoints_decoder(3);
qpoints_decoder.DecodePoints(buffer, oit);
break;
}
case 1: {
DynamicIntegerPointsKdTreeDecoder<1> qpoints_decoder(3);
qpoints_decoder.DecodePoints(buffer, oit);
break;
}
case 2: {
DynamicIntegerPointsKdTreeDecoder<2> qpoints_decoder(3);
qpoints_decoder.DecodePoints(buffer, oit);
break;
}
case 3: {
DynamicIntegerPointsKdTreeDecoder<3> qpoints_decoder(3);
qpoints_decoder.DecodePoints(buffer, oit);
break;
}
case 4: {
DynamicIntegerPointsKdTreeDecoder<4> qpoints_decoder(3);
qpoints_decoder.DecodePoints(buffer, oit);
break;
}
case 5: {
DynamicIntegerPointsKdTreeDecoder<5> qpoints_decoder(3);
qpoints_decoder.DecodePoints(buffer, oit);
break;
}
case 6: {
DynamicIntegerPointsKdTreeDecoder<6> qpoints_decoder(3);
qpoints_decoder.DecodePoints(buffer, oit);
break;
}
default:
return false;
}
}
if (qpoints->size() != num_points_) {
return false;
}
return true;
}
} // namespace draco
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