FFmpeg
libavcodec
sinewin_fixed_tablegen.h
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/*
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* Header file for hardcoded sine windows
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*
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* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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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_SINEWIN_FIXED_TABLEGEN_H
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#define AVCODEC_SINEWIN_FIXED_TABLEGEN_H
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#ifdef BUILD_TABLES
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#undef DECLARE_ALIGNED
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#define DECLARE_ALIGNED(align, type, name) type name
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#else
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#include "
libavutil/mem_internal.h
"
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#endif
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#define SINETABLE(size) \
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static SINETABLE_CONST DECLARE_ALIGNED(32, int, sine_##size##_fixed)[size]
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#if CONFIG_HARDCODED_TABLES
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#define init_sine_windows_fixed()
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#define SINETABLE_CONST const
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#include "libavcodec/sinewin_fixed_tables.h"
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#else
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// do not use libavutil/libm.h since this is compiled both
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// for the host and the target and config.h is only valid for the target
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#include <math.h>
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#include "
libavutil/attributes.h
"
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#define SINETABLE_CONST
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SINETABLE
( 128);
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SINETABLE
( 512);
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SINETABLE
(1024);
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#define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5)
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// Generate a sine window.
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static
av_cold
void
sine_window_init_fixed
(
int
*
window
,
int
n)
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{
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for
(
int
i
= 0;
i
< n;
i
++)
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window
[
i
] =
SIN_FIX
(
sinf
((
i
+ 0.5) * (
M_PI
/ (2.0 * n))));
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}
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static
av_cold
void
init_sine_windows_fixed
(
void
)
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{
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sine_window_init_fixed
(sine_128_fixed, 128);
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sine_window_init_fixed
(sine_512_fixed, 512);
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sine_window_init_fixed
(sine_1024_fixed, 1024);
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}
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#endif
/* CONFIG_HARDCODED_TABLES */
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#endif
/* AVCODEC_SINEWIN_FIXED_TABLEGEN_H */
mem_internal.h
window
static SDL_Window * window
Definition:
ffplay.c:364
av_cold
#define av_cold
Definition:
attributes.h:90
SIN_FIX
#define SIN_FIX(a)
Definition:
sinewin_fixed_tablegen.h:51
sinf
#define sinf(x)
Definition:
libm.h:419
SINETABLE
#define SINETABLE(size)
Definition:
sinewin_fixed_tablegen.h:33
sine_window_init_fixed
static av_cold void sine_window_init_fixed(int *window, int n)
Definition:
sinewin_fixed_tablegen.h:54
attributes.h
M_PI
#define M_PI
Definition:
mathematics.h:52
i
#define i(width, name, range_min, range_max)
Definition:
cbs_h2645.c:271
init_sine_windows_fixed
static av_cold void init_sine_windows_fixed(void)
Definition:
sinewin_fixed_tablegen.h:60
Generated on Wed Aug 24 2022 21:37:54 for FFmpeg by
1.8.17