forked from KolibriOS/kolibrios
80 lines
2.4 KiB
C
80 lines
2.4 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 "libavcodec/aac_defines.h"
|
|
#include "libavutil/attributes.h"
|
|
#include "libavutil/common.h"
|
|
|
|
#if !CONFIG_HARDCODED_TABLES
|
|
SINETABLE( 32);
|
|
SINETABLE( 64);
|
|
SINETABLE( 128);
|
|
SINETABLE( 256);
|
|
SINETABLE( 512);
|
|
SINETABLE(1024);
|
|
SINETABLE(2048);
|
|
SINETABLE(4096);
|
|
SINETABLE(8192);
|
|
#else
|
|
#if USE_FIXED
|
|
#include "libavcodec/sinewin_fixed_tables.h"
|
|
#else
|
|
#include "libavcodec/sinewin_tables.h"
|
|
#endif
|
|
#endif
|
|
|
|
#if USE_FIXED
|
|
#define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5)
|
|
#else
|
|
#define SIN_FIX(a) a
|
|
#endif
|
|
|
|
SINETABLE_CONST INTFLOAT * const AAC_RENAME(ff_sine_windows)[] = {
|
|
NULL, NULL, NULL, NULL, NULL, // unused
|
|
AAC_RENAME(ff_sine_32) , AAC_RENAME(ff_sine_64), AAC_RENAME(ff_sine_128),
|
|
AAC_RENAME(ff_sine_256), AAC_RENAME(ff_sine_512), AAC_RENAME(ff_sine_1024),
|
|
AAC_RENAME(ff_sine_2048), AAC_RENAME(ff_sine_4096), AAC_RENAME(ff_sine_8192)
|
|
};
|
|
|
|
// Generate a sine window.
|
|
av_cold void AAC_RENAME(ff_sine_window_init)(INTFLOAT *window, int n) {
|
|
int i;
|
|
for(i = 0; i < n; i++)
|
|
window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n))));
|
|
}
|
|
|
|
av_cold void AAC_RENAME(ff_init_ff_sine_windows)(int index) {
|
|
assert(index >= 0 && index < FF_ARRAY_ELEMS(AAC_RENAME(ff_sine_windows)));
|
|
#if !CONFIG_HARDCODED_TABLES
|
|
AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);
|
|
#endif
|
|
}
|
|
|
|
#endif /* AVCODEC_SINEWIN_TABLEGEN_H */
|