FFmpeg
libavcodec
sinewin_tablegen.h
Go to the documentation of this file.
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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_TABLEGEN_H
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#define AVCODEC_SINEWIN_TABLEGEN_H
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#include <assert.h>
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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 "
libavcodec/aac_defines.h
"
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#include "
libavutil/attributes.h
"
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#include "
libavutil/common.h
"
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#if !USE_FIXED
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SINETABLE120960
(120);
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SINETABLE120960
(960);
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#endif
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#if !CONFIG_HARDCODED_TABLES
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SINETABLE
( 32);
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SINETABLE
( 64);
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SINETABLE
( 128);
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SINETABLE
( 256);
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SINETABLE
( 512);
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SINETABLE
(1024);
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SINETABLE
(2048);
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SINETABLE
(4096);
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SINETABLE
(8192);
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#else
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#if USE_FIXED
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#include "libavcodec/sinewin_fixed_tables.h"
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#else
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#include "libavcodec/sinewin_tables.h"
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#endif
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#endif
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#if USE_FIXED
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#define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5)
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#else
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#define SIN_FIX(a) a
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#endif
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SINETABLE_CONST
INTFLOAT
*
const
AAC_RENAME
(ff_sine_windows)[] = {
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NULL
,
NULL
,
NULL
,
NULL
,
NULL
,
// unused
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AAC_RENAME
(ff_sine_32) ,
AAC_RENAME
(ff_sine_64),
AAC_RENAME
(ff_sine_128),
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AAC_RENAME
(ff_sine_256),
AAC_RENAME
(ff_sine_512),
AAC_RENAME
(ff_sine_1024),
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AAC_RENAME
(ff_sine_2048),
AAC_RENAME
(ff_sine_4096),
AAC_RENAME
(ff_sine_8192),
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};
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// Generate a sine window.
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av_cold
void
AAC_RENAME
(
ff_sine_window_init
)(
INTFLOAT
*
window
,
int
n
) {
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int
i
;
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for
(
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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av_cold
void
AAC_RENAME
(
ff_init_ff_sine_windows
)(
int
index
) {
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assert(
index
>= 0 &&
index
<
FF_ARRAY_ELEMS
(
AAC_RENAME
(ff_sine_windows)));
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#if !CONFIG_HARDCODED_TABLES
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AAC_RENAME
(
ff_sine_window_init
)(
AAC_RENAME
(ff_sine_windows)[
index
], 1 <<
index
);
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#endif
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}
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#endif
/* AVCODEC_SINEWIN_TABLEGEN_H */
SINETABLE120960
SINETABLE120960(120)
ff_init_ff_sine_windows
av_cold void AAC_RENAME() ff_init_ff_sine_windows(int index)
initialize the specified entry of ff_sine_windows
Definition:
sinewin_tablegen.h:76
n
int n
Definition:
avisynth_c.h:760
ff_sine_window_init
av_cold void AAC_RENAME() ff_sine_window_init(INTFLOAT *window, int n)
Generate a sine window.
Definition:
sinewin_tablegen.h:70
window
static SDL_Window * window
Definition:
ffplay.c:367
SINETABLE
SINETABLE(32)
av_cold
#define av_cold
Definition:
attributes.h:84
SIN_FIX
#define SIN_FIX(a)
Definition:
sinewin_tablegen.h:59
NULL
#define NULL
Definition:
coverity.c:32
sinf
#define sinf(x)
Definition:
libm.h:419
index
int index
Definition:
gxfenc.c:89
attributes.h
M_PI
#define M_PI
Definition:
mathematics.h:52
i
#define i(width, name, range_min, range_max)
Definition:
cbs_h2645.c:259
common.h
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition:
sinewin_tablegen_template.c:38
AAC_RENAME
SINETABLE_CONST INTFLOAT *const AAC_RENAME(ff_sine_windows)[]
aac_defines.h
SINETABLE_CONST
#define SINETABLE_CONST
Definition:
sinewin.h:31
INTFLOAT
float INTFLOAT
Definition:
aac_defines.h:86
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