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/*
* 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_
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