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libavcodec
celp_math.h
Go to the documentation of this file.
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/*
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* Various fixed-point math operations
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*
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* Copyright (c) 2008 Vladimir Voroshilov
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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 AVCODEC_CELP_MATH_H
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#define AVCODEC_CELP_MATH_H
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#include <stdint.h>
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typedef
struct
CELPMContext
{
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float (*
dot_productf
)(
const
float
*
a
,
const
float
*
b
,
int
length);
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}
CELPMContext
;
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void
ff_celp_math_init
(
CELPMContext
*
c
);
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void
ff_celp_math_init_mips
(
CELPMContext
*
c
);
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int
ff_exp2
(uint16_t power);
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int
ff_log2_q15
(uint32_t
value
);
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static
inline
int
bidir_sal
(
int
value
,
int
offset
)
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{
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if
(offset < 0)
return
value >> -
offset
;
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else
return
value <<
offset
;
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}
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int64_t
ff_dot_product
(
const
int16_t *
a
,
const
int16_t *
b
,
int
length);
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float
ff_dot_productf
(
const
float
*
a
,
const
float
*
b
,
int
length);
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#endif
/* AVCODEC_CELP_MATH_H */
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