/*
  * 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 */