68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/*
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* Copyright (c) 2021, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_AV1_ENCODER_SPARSE_LINEAR_SOLVER_H_
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#define AOM_AV1_ENCODER_SPARSE_LINEAR_SOLVER_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "config/aom_config.h"
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#if CONFIG_OPTICAL_FLOW_API
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// Number of iterations for solving linear equations.
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#define MAX_CG_SP_ITER 100
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typedef struct {
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int n_elem; // number of non-zero elements
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int n_rows;
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int n_cols;
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// using arrays to represent non-zero elements.
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int *col_pos;
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int *row_pos; // starts with 0
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double *value;
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} SPARSE_MTX;
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int av1_init_sparse_mtx(const int *rows, const int *cols, const double *values,
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int num_elem, int num_rows, int num_cols,
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SPARSE_MTX *sm);
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int av1_init_combine_sparse_mtx(const SPARSE_MTX *sm1, const SPARSE_MTX *sm2,
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SPARSE_MTX *sm, int row_offset1,
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int col_offset1, int row_offset2,
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int col_offset2, int new_n_rows,
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int new_n_cols);
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void av1_free_sparse_mtx_elems(SPARSE_MTX *sm);
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void av1_mtx_vect_multi_right(const SPARSE_MTX *sm, const double *srcv,
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double *dstv, int dstl);
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void av1_mtx_vect_multi_left(const SPARSE_MTX *sm, const double *srcv,
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double *dstv, int dstl);
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double av1_vect_vect_multi(const double *src1, int src1l, const double *src2);
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void av1_constant_multiply_sparse_matrix(SPARSE_MTX *sm, double c);
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int av1_conjugate_gradient_sparse(const SPARSE_MTX *A, const double *b, int bl,
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double *x);
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int av1_bi_conjugate_gradient_sparse(const SPARSE_MTX *A, const double *b,
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int bl, double *x);
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int av1_jacobi_sparse(const SPARSE_MTX *A, const double *b, int bl, double *x);
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int av1_steepest_descent_sparse(const SPARSE_MTX *A, const double *b, int bl,
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double *x);
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#endif // CONFIG_OPTICAL_FLOW_API
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif /* AOM_AV1_ENCODER_SPARSE_LINEAR_SOLVER_H_ */
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