aboutsummaryrefslogblamecommitdiffstats
path: root/libavutil/lls.h
blob: d168e5974926d98225e9946bbb31d4a55cf48763 (plain) (tree)
1
2
3
4
5
6
7
8
9
10



                                                            

                                                          
                                                               
                                                                     
  
                                                            



                                                                    
                                                                
                                                                               
   
                    








                                                    
                                     



                                                             
                                                                
 
                         
/*
 * linear least squares model
 *
 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVUTIL_LLS_H
#define AVUTIL_LLS_H

#define MAX_VARS 32

//FIXME avoid direct access to LLSModel from outside

/**
 * Linear least squares model.
 */
typedef struct LLSModel{
    double covariance[MAX_VARS+1][MAX_VARS+1];
    double coeff[MAX_VARS][MAX_VARS];
    double variance[MAX_VARS];
    int indep_count;
}LLSModel;

void av_init_lls(LLSModel *m, int indep_count);
void av_update_lls(LLSModel *m, double *param, double decay);
void av_solve_lls(LLSModel *m, double threshold, int min_order);
double av_evaluate_lls(LLSModel *m, double *param, int order);

#endif /* AVUTIL_LLS_H */