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8374e14042
1. More optimized selection of prediction schemes for different compression levels on the encoder side. 2. Improved robustness to tampered input data (.drc) 3. Added support for strognly typed vectors of bools 4. Support for logging and squared lenght to our VectorND class 5. Added support for partially defined indices in .OBJ files 6. Added support for loading of normal vectors in .PLY files
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
// 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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#include "compression/attributes/prediction_schemes/prediction_scheme_encoder_factory.h"
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namespace draco {
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PredictionSchemeMethod SelectPredictionMethod(
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int att_id, const PointCloudEncoder *encoder) {
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if (encoder->options()->GetSpeed() >= 10) {
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return PREDICTION_NONE; // No prediction when the fastest speed is
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// requested.
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}
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if (encoder->GetGeometryType() == TRIANGULAR_MESH) {
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// Use speed setting to select the best encoding method.
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const PointAttribute *const att = encoder->point_cloud()->attribute(att_id);
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if (att->attribute_type() == GeometryAttribute::TEX_COORD) {
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if (encoder->options()->GetSpeed() < 4) {
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// Use texture coordinate prediction for speeds 0, 1, 2, 3.
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return MESH_PREDICTION_TEX_COORDS;
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}
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}
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// Handle other attribute types.
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if (encoder->options()->GetSpeed() >= 8) {
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return PREDICTION_DIFFERENCE;
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}
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if (encoder->options()->GetSpeed() >= 2) {
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// Parallelogram prediction is used for speeds 2 - 7.
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return MESH_PREDICTION_PARALLELOGRAM;
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}
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// Multi-parallelogram is used for speeds 0, 1.
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return MESH_PREDICTION_MULTI_PARALLELOGRAM;
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}
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// Default option is delta coding.
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return PREDICTION_DIFFERENCE;
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}
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// Returns the preferred prediction scheme based on the encoder options.
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PredictionSchemeMethod GetPredictionMethodFromOptions(
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int att_id, const EncoderOptions &options) {
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const int pred_type =
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options.GetAttributeInt(att_id, "prediction_scheme", -1);
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if (pred_type == -1)
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return PREDICTION_UNDEFINED;
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if (pred_type < 0 || pred_type >= NUM_PREDICTION_SCHEMES)
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return PREDICTION_NONE;
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return static_cast<PredictionSchemeMethod>(pred_type);
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}
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} // namespace draco
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