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 FFMPEG_LLS_H 24 #define FFMPEG_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 /* FFMPEG_LLS_H */ 46