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63 lines
2.2 KiB
63 lines
2.2 KiB
/* |
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* linear least squares model |
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* |
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* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVUTIL_LLS_H |
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#define AVUTIL_LLS_H |
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#include "macros.h" |
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#include "mem_internal.h" |
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#define MAX_VARS 32 |
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#define MAX_VARS_ALIGN FFALIGN(MAX_VARS+1,4) |
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//FIXME avoid direct access to LLSModel from outside |
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/** |
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* Linear least squares model. |
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*/ |
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typedef struct LLSModel { |
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DECLARE_ALIGNED(32, double, covariance[MAX_VARS_ALIGN][MAX_VARS_ALIGN]); |
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DECLARE_ALIGNED(32, double, coeff[MAX_VARS][MAX_VARS]); |
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double variance[MAX_VARS]; |
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int indep_count; |
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/** |
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* Take the outer-product of var[] with itself, and add to the covariance matrix. |
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* @param m this context |
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* @param var training samples, starting with the value to be predicted |
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* 32-byte aligned, and any padding elements must be initialized |
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* (i.e not denormal/nan). |
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*/ |
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void (*update_lls)(struct LLSModel *m, const double *var); |
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/** |
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* Inner product of var[] and the LPC coefs. |
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* @param m this context |
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* @param var training samples, excluding the value to be predicted. unaligned. |
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* @param order lpc order |
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*/ |
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double (*evaluate_lls)(struct LLSModel *m, const double *var, int order); |
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} LLSModel; |
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void avpriv_init_lls(LLSModel *m, int indep_count); |
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void ff_init_lls_x86(LLSModel *m); |
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void avpriv_solve_lls(LLSModel *m, double threshold, unsigned short min_order); |
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#endif /* AVUTIL_LLS_H */
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