2 * linear least squares model
4 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
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.
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.
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
31 #define MAX_VARS_ALIGN FFALIGN(MAX_VARS+1,4)
33 //FIXME avoid direct access to LLSModel from outside
36 * Linear least squares model.
38 typedef struct LLSModel
{
39 DECLARE_ALIGNED(32, double, covariance
[MAX_VARS_ALIGN
][MAX_VARS_ALIGN
]);
40 DECLARE_ALIGNED(32, double, coeff
[MAX_VARS
][MAX_VARS
]);
41 double variance
[MAX_VARS
];
44 * Take the outer-product of var[] with itself, and add to the covariance matrix.
45 * @param m this context
46 * @param var training samples, starting with the value to be predicted
47 * 32-byte aligned, and any padding elements must be initialized
48 * (i.e not denormal/nan).
50 void (*update_lls
)(struct LLSModel
*m
, const double *var
);
52 * Inner product of var[] and the LPC coefs.
53 * @param m this context
54 * @param var training samples, excluding the value to be predicted. unaligned.
55 * @param order lpc order
57 double (*evaluate_lls
)(struct LLSModel
*m
, const double *var
, int order
);
60 void avpriv_init_lls(LLSModel
*m
, int indep_count
);
61 void ff_init_lls_x86(LLSModel
*m
);
62 void avpriv_solve_lls(LLSModel
*m
, double threshold
, unsigned short min_order
);
64 #endif /* AVUTIL_LLS_H */