| /* | |
| * linear least squares model | |
| * | |
| * Copyright (c) 2006 Michael Niedermayer <[email protected]> | |
| * | |
| * 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 | |
| */ | |
| //FIXME avoid direct access to LLSModel from outside | |
| /** | |
| * Linear least squares model. | |
| */ | |
| typedef struct LLSModel { | |
| DECLARE_ALIGNED(32, double, covariance[MAX_VARS_ALIGN][MAX_VARS_ALIGN]); | |
| DECLARE_ALIGNED(32, double, coeff[MAX_VARS][MAX_VARS]); | |
| double variance[MAX_VARS]; | |
| int indep_count; | |
| /** | |
| * Take the outer-product of var[] with itself, and add to the covariance matrix. | |
| * @param m this context | |
| * @param var training samples, starting with the value to be predicted | |
| * 32-byte aligned, and any padding elements must be initialized | |
| * (i.e not denormal/nan). | |
| */ | |
| void (*update_lls)(struct LLSModel *m, const double *var); | |
| /** | |
| * Inner product of var[] and the LPC coefs. | |
| * @param m this context | |
| * @param var training samples, excluding the value to be predicted. unaligned. | |
| * @param order lpc order | |
| */ | |
| double (*evaluate_lls)(struct LLSModel *m, const double *var, int order); | |
| } LLSModel; | |
| void avpriv_init_lls(LLSModel *m, int indep_count); | |
| void ff_init_lls_x86(LLSModel *m); | |
| void avpriv_solve_lls(LLSModel *m, double threshold, unsigned short min_order); | |