From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- media/ffvpx/libavutil/lls.h | 64 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 media/ffvpx/libavutil/lls.h (limited to 'media/ffvpx/libavutil/lls.h') diff --git a/media/ffvpx/libavutil/lls.h b/media/ffvpx/libavutil/lls.h new file mode 100644 index 000000000..1a276d537 --- /dev/null +++ b/media/ffvpx/libavutil/lls.h @@ -0,0 +1,64 @@ +/* + * linear least squares model + * + * Copyright (c) 2006 Michael Niedermayer + * + * 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 + +#include "macros.h" +#include "mem.h" +#include "version.h" + +#define MAX_VARS 32 +#define MAX_VARS_ALIGN FFALIGN(MAX_VARS+1,4) + +//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); + +#endif /* AVUTIL_LLS_H */ -- cgit v1.2.3