| // Copyright 2018 Google LLC |
| // |
| // 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 |
| // |
| // https://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 ASTC_CODEC_DECODER_WEIGHT_INFILL_H_ |
| #define ASTC_CODEC_DECODER_WEIGHT_INFILL_H_ |
| |
| #include "src/decoder/footprint.h" |
| |
| #include <vector> |
| |
| namespace astc_codec { |
| |
| // Returns the number of bits used to represent the weight grid at the target |
| // dimensions and weight range. |
| int CountBitsForWeights(int weight_dim_x, int weight_dim_y, |
| int target_weight_range); |
| |
| // Performs weight infill of a grid of weights of size |dim_x * dim_y|. The |
| // weights are fit using the algorithm laid out in Section C.2.18 of the ASTC |
| // specification. Weights are expected to be passed unquantized and the returned |
| // grid will be unquantized as well (i.e. each weight within the range [0, 64]). |
| std::vector<int> InfillWeights(const std::vector<int>& weights, |
| Footprint footprint, int dim_x, int dim_y); |
| |
| } // namespace astc_codec |
| |
| #endif // ASTC_CODEC_DECODER_WEIGHT_INFILL_H_ |
