1/*
2 * linear least squares model
3 *
4 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#ifndef AVUTIL_LLS_H
24#define AVUTIL_LLS_H
25
26#include "version.h"
27
28#define MAX_VARS 32
29
30//FIXME avoid direct access to LLSModel from outside
31
32/**
33 * Linear least squares model.
34 */
35typedef struct LLSModel {
36    double covariance[MAX_VARS + 1][MAX_VARS + 1];
37    double coeff[MAX_VARS][MAX_VARS];
38    double variance[MAX_VARS];
39    int indep_count;
40} LLSModel;
41
42void avpriv_init_lls(LLSModel *m, int indep_count);
43void avpriv_update_lls(LLSModel *m, double *param, double decay);
44void avpriv_solve_lls(LLSModel *m, double threshold, unsigned short min_order);
45double avpriv_evaluate_lls(LLSModel *m, double *param, int order);
46
47#if FF_API_LLS_PRIVATE
48void av_init_lls(LLSModel *m, int indep_count);
49void av_update_lls(LLSModel *m, double *param, double decay);
50void av_solve_lls(LLSModel *m, double threshold, int min_order);
51double av_evaluate_lls(LLSModel *m, double *param, int order);
52#endif /* FF_API_LLS_PRIVATE */
53
54#endif /* AVUTIL_LLS_H */
55