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Diffstat (limited to 'extern/draco/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_wrap_decoding_transform.h')
-rw-r--r-- | extern/draco/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_wrap_decoding_transform.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/extern/draco/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_wrap_decoding_transform.h b/extern/draco/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_wrap_decoding_transform.h new file mode 100644 index 00000000000..0a14d0d9ba4 --- /dev/null +++ b/extern/draco/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_wrap_decoding_transform.h @@ -0,0 +1,72 @@ +// 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_ATTRIBUTES_PREDICTION_SCHEMES_PREDICTION_SCHEME_WRAP_DECODING_TRANSFORM_H_ +#define DRACO_COMPRESSION_ATTRIBUTES_PREDICTION_SCHEMES_PREDICTION_SCHEME_WRAP_DECODING_TRANSFORM_H_ + +#include "draco/compression/attributes/prediction_schemes/prediction_scheme_wrap_transform_base.h" +#include "draco/core/decoder_buffer.h" + +namespace draco { + +// PredictionSchemeWrapDecodingTransform unwraps values encoded with the +// PredictionSchemeWrapEncodingTransform. +// See prediction_scheme_wrap_transform_base.h for more details about the +// method. +template <typename DataTypeT, typename CorrTypeT = DataTypeT> +class PredictionSchemeWrapDecodingTransform + : public PredictionSchemeWrapTransformBase<DataTypeT> { + public: + typedef CorrTypeT CorrType; + PredictionSchemeWrapDecodingTransform() {} + + // Computes the original value from the input predicted value and the decoded + // corrections. Values out of the bounds of the input values are unwrapped. + inline void ComputeOriginalValue(const DataTypeT *predicted_vals, + const CorrTypeT *corr_vals, + DataTypeT *out_original_vals) const { + predicted_vals = this->ClampPredictedValue(predicted_vals); + for (int i = 0; i < this->num_components(); ++i) { + out_original_vals[i] = predicted_vals[i] + corr_vals[i]; + if (out_original_vals[i] > this->max_value()) { + out_original_vals[i] -= this->max_dif(); + } else if (out_original_vals[i] < this->min_value()) { + out_original_vals[i] += this->max_dif(); + } + } + } + + bool DecodeTransformData(DecoderBuffer *buffer) { + DataTypeT min_value, max_value; + if (!buffer->Decode(&min_value)) { + return false; + } + if (!buffer->Decode(&max_value)) { + return false; + } + if (min_value > max_value) { + return false; + } + this->set_min_value(min_value); + this->set_max_value(max_value); + if (!this->InitCorrectionBounds()) { + return false; + } + return true; + } +}; + +} // namespace draco + +#endif // DRACO_COMPRESSION_ATTRIBUTES_PREDICTION_SCHEMES_PREDICTION_SCHEME_WRAP_DECODING_TRANSFORM_H_ |