mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.6 KiB
82 lines
2.6 KiB
/* |
|
* 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 |
|
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 SINEWIN_SUFFIX(a) a ## _fixed |
|
#define INTFLOAT int |
|
#define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5) |
|
#else |
|
#define SINEWIN_SUFFIX(a) a |
|
#define INTFLOAT float |
|
#define SIN_FIX(a) a |
|
#endif |
|
|
|
SINETABLE_CONST INTFLOAT * const SINEWIN_SUFFIX(ff_sine_windows)[] = { |
|
NULL, NULL, NULL, NULL, NULL, // unused |
|
SINEWIN_SUFFIX(ff_sine_32) , SINEWIN_SUFFIX(ff_sine_64), SINEWIN_SUFFIX(ff_sine_128), |
|
SINEWIN_SUFFIX(ff_sine_256), SINEWIN_SUFFIX(ff_sine_512), SINEWIN_SUFFIX(ff_sine_1024), |
|
SINEWIN_SUFFIX(ff_sine_2048), SINEWIN_SUFFIX(ff_sine_4096), SINEWIN_SUFFIX(ff_sine_8192) |
|
}; |
|
|
|
// Generate a sine window. |
|
av_cold void SINEWIN_SUFFIX(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 SINEWIN_SUFFIX(ff_init_ff_sine_windows)(int index) { |
|
assert(index >= 0 && index < FF_ARRAY_ELEMS(SINEWIN_SUFFIX(ff_sine_windows))); |
|
#if !CONFIG_HARDCODED_TABLES |
|
SINEWIN_SUFFIX(ff_sine_window_init)(SINEWIN_SUFFIX(ff_sine_windows)[index], 1 << index); |
|
#endif |
|
} |
|
|
|
#endif /* AVCODEC_SINEWIN_TABLEGEN_H */
|
|
|