mirror of https://git.ffmpeg.org/ffmpeg.git
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
|
|
* Header file for hardcoded sine windows
|
|
*
|
|
* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
|
|
*
|
|
* 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 AVCODEC_SINEWIN_TABLEGEN_H
|
|
#define AVCODEC_SINEWIN_TABLEGEN_H
|
|
|
|
#include <assert.h>
|
|
// do not use libavutil/libm.h since this is compiled both
|
|
// for the host and the target and config.h is only valid for the target
|
|
#include <math.h>
|
|
#include "libavutil/attributes.h"
|
|
#include "libavutil/common.h"
|
|
|
|
#if !CONFIG_HARDCODED_TABLES
|
|
#ifndef BUILD_TABLES
|
|
#include "libavutil/thread.h"
|
|
#endif
|
|
|
|
SINETABLE( 32);
|
|
SINETABLE( 64);
|
|
SINETABLE( 128);
|
|
SINETABLE( 256);
|
|
SINETABLE( 512);
|
|
SINETABLE(1024);
|
|
SINETABLE(2048);
|
|
SINETABLE(4096);
|
|
SINETABLE(8192);
|
|
#else
|
|
#include "libavcodec/sinewin_tables.h"
|
|
#endif
|
|
|
|
SINETABLE_CONST float *const ff_sine_windows[] = {
|
|
NULL, NULL, NULL, NULL, NULL, // unused
|
|
ff_sine_32, ff_sine_64, ff_sine_128,
|
|
ff_sine_256, ff_sine_512, ff_sine_1024,
|
|
ff_sine_2048, ff_sine_4096, ff_sine_8192,
|
|
};
|
|
|
|
// Generate a sine window.
|
|
av_cold void ff_sine_window_init(float *window, int n)
|
|
{
|
|
int i;
|
|
for(i = 0; i < n; i++)
|
|
window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n)));
|
|
}
|
|
|
|
#if !CONFIG_HARDCODED_TABLES && !defined(BUILD_TABLES)
|
|
#define INIT_FF_SINE_WINDOW_INIT_FUNC(index) \
|
|
static void init_ff_sine_window_ ## index(void) \
|
|
{ \
|
|
ff_sine_window_init(ff_sine_windows[index], 1 << index);\
|
|
}
|
|
|
|
INIT_FF_SINE_WINDOW_INIT_FUNC(5)
|
|
INIT_FF_SINE_WINDOW_INIT_FUNC(6)
|
|
INIT_FF_SINE_WINDOW_INIT_FUNC(7)
|
|
INIT_FF_SINE_WINDOW_INIT_FUNC(8)
|
|
INIT_FF_SINE_WINDOW_INIT_FUNC(9)
|
|
INIT_FF_SINE_WINDOW_INIT_FUNC(10)
|
|
INIT_FF_SINE_WINDOW_INIT_FUNC(11)
|
|
INIT_FF_SINE_WINDOW_INIT_FUNC(12)
|
|
INIT_FF_SINE_WINDOW_INIT_FUNC(13)
|
|
|
|
static void (*const sine_window_init_func_array[])(void) = {
|
|
init_ff_sine_window_5,
|
|
init_ff_sine_window_6,
|
|
init_ff_sine_window_7,
|
|
init_ff_sine_window_8,
|
|
init_ff_sine_window_9,
|
|
init_ff_sine_window_10,
|
|
init_ff_sine_window_11,
|
|
init_ff_sine_window_12,
|
|
init_ff_sine_window_13,
|
|
};
|
|
|
|
static AVOnce init_sine_window_once[9] = {
|
|
AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT,
|
|
AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT
|
|
};
|
|
#endif
|
|
|
|
av_cold void ff_init_ff_sine_windows(int index)
|
|
{
|
|
assert(index >= 5 && index < FF_ARRAY_ELEMS(ff_sine_windows));
|
|
#if !CONFIG_HARDCODED_TABLES
|
|
#ifdef BUILD_TABLES
|
|
ff_sine_window_init(ff_sine_windows[index], 1 << index);
|
|
#else
|
|
ff_thread_once(&init_sine_window_once[index - 5], sine_window_init_func_array[index - 5]);
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
#endif /* AVCODEC_SINEWIN_TABLEGEN_H */
|