| /* |
| * Copyright 2019 The libgav1 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 LIBGAV1_SRC_WARP_PREDICTION_H_ |
| #define LIBGAV1_SRC_WARP_PREDICTION_H_ |
| |
| #include "src/obu_parser.h" |
| #include "src/utils/constants.h" |
| #include "src/utils/types.h" |
| |
| namespace libgav1 { |
| |
| // Sets the alpha, beta, gamma, delta fields in warp_params using the |
| // warp_params->params array as input (only array entries at indexes 2, 3, 4, |
| // 5 are used). Returns whether alpha, beta, gamma, delta are valid. |
| bool SetupShear(GlobalMotion* warp_params); // 7.11.3.6. |
| |
| // Computes local warp parameters by performing a least square fit. |
| // Returns whether the computed parameters are valid. |
| bool WarpEstimation(int num_samples, int block_width4x4, int block_height4x4, |
| int row4x4, int column4x4, const MotionVector& mv, |
| const int candidates[kMaxLeastSquaresSamples][4], |
| GlobalMotion* warp_params); // 7.11.3.8. |
| |
| } // namespace libgav1 |
| |
| #endif // LIBGAV1_SRC_WARP_PREDICTION_H_ |