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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];
  37.     double coeff[MAX_VARS][MAX_VARS];
  38.     double variance[MAX_VARS];
  39.     int indep_count;
  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 */
  55.