PeerStreamer

/*

 * 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 */