FFmpeg
libavcodec
sinewin_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_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 "
libavutil/attributes.h
"
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#include "
libavutil/common.h
"
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#if !CONFIG_HARDCODED_TABLES
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#ifndef BUILD_TABLES
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#include "
libavutil/thread.h
"
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#endif
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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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#include "libavcodec/sinewin_tables.h"
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#endif
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SINETABLE_CONST
float
*
const
ff_sine_windows
[] = {
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NULL
,
NULL
,
NULL
,
NULL
,
NULL
,
// unused
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ff_sine_32, ff_sine_64, ff_sine_128,
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ff_sine_256, ff_sine_512, ff_sine_1024,
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ff_sine_2048, ff_sine_4096, ff_sine_8192,
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};
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// Generate a sine window.
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av_cold
void
ff_sine_window_init
(
float
*
window
,
int
n)
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{
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int
i
;
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for
(
i
= 0;
i
< n;
i
++)
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window
[
i
] =
sinf
((
i
+ 0.5) * (
M_PI
/ (2.0 * n)));
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}
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#if !CONFIG_HARDCODED_TABLES && !defined(BUILD_TABLES)
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#define INIT_FF_SINE_WINDOW_INIT_FUNC(index) \
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static void init_ff_sine_window_ ## index(void) \
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{ \
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ff_sine_window_init(ff_sine_windows[index], 1 << index);\
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}
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INIT_FF_SINE_WINDOW_INIT_FUNC
(5)
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INIT_FF_SINE_WINDOW_INIT_FUNC
(6)
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INIT_FF_SINE_WINDOW_INIT_FUNC
(7)
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INIT_FF_SINE_WINDOW_INIT_FUNC
(8)
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INIT_FF_SINE_WINDOW_INIT_FUNC
(9)
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INIT_FF_SINE_WINDOW_INIT_FUNC
(10)
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INIT_FF_SINE_WINDOW_INIT_FUNC
(11)
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INIT_FF_SINE_WINDOW_INIT_FUNC
(12)
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INIT_FF_SINE_WINDOW_INIT_FUNC
(13)
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static
void
(*const
sine_window_init_func_array
[])(
void
) = {
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init_ff_sine_window_5,
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init_ff_sine_window_6,
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init_ff_sine_window_7,
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init_ff_sine_window_8,
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init_ff_sine_window_9,
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init_ff_sine_window_10,
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init_ff_sine_window_11,
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init_ff_sine_window_12,
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init_ff_sine_window_13,
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};
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static
AVOnce
init_sine_window_once
[9] = {
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AV_ONCE_INIT
,
AV_ONCE_INIT
,
AV_ONCE_INIT
,
AV_ONCE_INIT
,
AV_ONCE_INIT
,
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AV_ONCE_INIT
,
AV_ONCE_INIT
,
AV_ONCE_INIT
,
AV_ONCE_INIT
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};
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#endif
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av_cold
void
ff_init_ff_sine_windows
(
int
index
)
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{
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assert(
index
>= 5 &&
index
<
FF_ARRAY_ELEMS
(
ff_sine_windows
));
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#if !CONFIG_HARDCODED_TABLES
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#ifdef BUILD_TABLES
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ff_sine_window_init
(
ff_sine_windows
[
index
], 1 <<
index
);
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#else
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ff_thread_once
(&
init_sine_window_once
[
index
- 5],
sine_window_init_func_array
[
index
- 5]);
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#endif
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#endif
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}
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#endif
/* AVCODEC_SINEWIN_TABLEGEN_H */
thread.h
sine_window_init_func_array
static void(*const sine_window_init_func_array[])(void)
Definition:
sinewin_tablegen.h:83
window
static SDL_Window * window
Definition:
ffplay.c:361
ff_init_ff_sine_windows
av_cold void ff_init_ff_sine_windows(int index)
initialize the specified entry of ff_sine_windows
Definition:
sinewin_tablegen.h:101
SINETABLE
SINETABLE(32)
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition:
thread.h:205
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition:
sinewin_tablegen.c:29
av_cold
#define av_cold
Definition:
attributes.h:90
ff_sine_windows
SINETABLE_CONST float *const ff_sine_windows[]
Definition:
sinewin_tablegen.h:51
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition:
thread.h:203
NULL
#define NULL
Definition:
coverity.c:32
init_sine_window_once
static AVOnce init_sine_window_once[9]
Definition:
sinewin_tablegen.h:95
sinf
#define sinf(x)
Definition:
libm.h:419
AVOnce
#define AVOnce
Definition:
thread.h:202
index
int index
Definition:
gxfenc.c:90
attributes.h
M_PI
#define M_PI
Definition:
mathematics.h:67
i
#define i(width, name, range_min, range_max)
Definition:
cbs_h2645.c:256
common.h
ff_sine_window_init
av_cold void ff_sine_window_init(float *window, int n)
Generate a sine window.
Definition:
sinewin_tablegen.h:59
INIT_FF_SINE_WINDOW_INIT_FUNC
#define INIT_FF_SINE_WINDOW_INIT_FUNC(index)
Definition:
sinewin_tablegen.h:67
SINETABLE_CONST
#define SINETABLE_CONST
Definition:
sinewin.h:30
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