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lls.h
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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  */
35 typedef struct LLSModel {
36  double covariance[MAX_VARS + 1][MAX_VARS + 1];
38  double variance[MAX_VARS];
40 } LLSModel;
41 
42 void avpriv_init_lls(LLSModel *m, int indep_count);
43 void avpriv_update_lls(LLSModel *m, double *param, double decay);
44 void avpriv_solve_lls(LLSModel *m, double threshold, unsigned short min_order);
45 double avpriv_evaluate_lls(LLSModel *m, double *param, int order);
46 
47 #if FF_API_LLS_PRIVATE
48 void av_init_lls(LLSModel *m, int indep_count);
49 void av_update_lls(LLSModel *m, double *param, double decay);
50 void av_solve_lls(LLSModel *m, double threshold, int min_order);
51 double av_evaluate_lls(LLSModel *m, double *param, int order);
52 #endif /* FF_API_LLS_PRIVATE */
53 
54 #endif /* AVUTIL_LLS_H */