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.
113 lines
3.3 KiB
113 lines
3.3 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 |
|
#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 */
|
|
|