FFmpeg
sinewin.h
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1 /*
2  * Copyright (c) 2008 Robert Swain
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVCODEC_SINEWIN_H
22 #define AVCODEC_SINEWIN_H
23 
24 #include "config.h"
25 #include "libavutil/mem_internal.h"
26 
27 #if CONFIG_HARDCODED_TABLES
28 # define SINETABLE_CONST const
29 #else
30 # define SINETABLE_CONST
31 #endif
32 
33 #define SINETABLE(size) \
34  SINETABLE_CONST DECLARE_ALIGNED(32, float, ff_sine_##size)[size]
35 
36 /**
37  * Generate a sine window.
38  * @param window pointer to half window
39  * @param n size of half window
40  */
41 void ff_sine_window_init(float *window, int n);
42 
43 /**
44  * initialize the specified entry of ff_sine_windows
45  */
47 
48 extern SINETABLE( 32);
49 extern SINETABLE( 64);
50 extern SINETABLE( 128);
51 extern SINETABLE( 256);
52 extern SINETABLE( 512);
53 extern SINETABLE(1024);
54 extern SINETABLE(2048);
55 extern SINETABLE(4096);
56 extern SINETABLE(8192);
57 
58 extern SINETABLE_CONST float *const ff_sine_windows[];
59 
60 #endif /* AVCODEC_SINEWIN_H */
ff_sine_windows
SINETABLE_CONST float *const ff_sine_windows[]
Definition: sinewin_tablegen.h:51
mem_internal.h
index
fg index
Definition: ffmpeg_filter.c:168
window
static SDL_Window * window
Definition: ffplay.c:366
SINETABLE
#define SINETABLE(size)
Definition: sinewin.h:33
ff_sine_window_init
void ff_sine_window_init(float *window, int n)
Generate a sine window.
Definition: sinewin_tablegen.h:59
ff_init_ff_sine_windows
void ff_init_ff_sine_windows(int index)
initialize the specified entry of ff_sine_windows
Definition: sinewin_tablegen.h:101
SINETABLE_CONST
#define SINETABLE_CONST
Definition: sinewin.h:30