libavutil/lls.h

   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 #define MAX_VARS 32
  27
  28 //FIXME avoid direct access to LLSModel from outside
  29
  30 /**
  31  * Linear least squares model.
  32  */
  33 typedef struct LLSModel{
  34     double covariance[MAX_VARS+1][MAX_VARS+1];
  35     double coeff[MAX_VARS][MAX_VARS];
  36     double variance[MAX_VARS];
  37     int indep_count;
  38 }LLSModel;
  39
  40 void av_init_lls(LLSModel *m, int indep_count);
  41 void av_update_lls(LLSModel *m, double *param, double decay);
  42 void av_solve_lls(LLSModel *m, double threshold, int min_order);
  43 double av_evaluate_lls(LLSModel *m, double *param, int order);
  44
  45 #endif /* AVUTIL_LLS_H */