FFmpeg
sinewin_tablegen.h
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1 /*
2  * Header file for hardcoded sine windows
3  *
4  * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #ifndef AVCODEC_SINEWIN_TABLEGEN_H
24 #define AVCODEC_SINEWIN_TABLEGEN_H
25 
26 #include <assert.h>
27 // do not use libavutil/libm.h since this is compiled both
28 // for the host and the target and config.h is only valid for the target
29 #include <math.h>
30 #include "libavcodec/aac_defines.h"
31 #include "libavutil/attributes.h"
32 #include "libavutil/common.h"
33 
34 #if !CONFIG_HARDCODED_TABLES
35 #ifndef BUILD_TABLES
36 #include "libavutil/thread.h"
37 #endif
38 
39 SINETABLE( 32);
40 SINETABLE( 64);
41 SINETABLE( 128);
42 SINETABLE( 256);
43 SINETABLE( 512);
44 SINETABLE(1024);
45 SINETABLE(2048);
46 SINETABLE(4096);
47 SINETABLE(8192);
48 #else
49 #if USE_FIXED
50 #include "libavcodec/sinewin_fixed_tables.h"
51 #else
52 #include "libavcodec/sinewin_tables.h"
53 #endif
54 #endif
55 
56 #if USE_FIXED
57 #define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5)
58 #else
59 #define SIN_FIX(a) a
60 #endif
61 
62 SINETABLE_CONST INTFLOAT * const AAC_RENAME(ff_sine_windows)[] = {
63  NULL, NULL, NULL, NULL, NULL, // unused
64  AAC_RENAME(ff_sine_32) , AAC_RENAME(ff_sine_64), AAC_RENAME(ff_sine_128),
65  AAC_RENAME(ff_sine_256), AAC_RENAME(ff_sine_512), AAC_RENAME(ff_sine_1024),
66  AAC_RENAME(ff_sine_2048), AAC_RENAME(ff_sine_4096), AAC_RENAME(ff_sine_8192),
67 };
68 
69 // Generate a sine window.
71  int i;
72  for(i = 0; i < n; i++)
73  window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n))));
74 }
75 
76 #if !CONFIG_HARDCODED_TABLES && !defined(BUILD_TABLES)
77 #define INIT_FF_SINE_WINDOW_INIT_FUNC(index) \
78 static void init_ff_sine_window_ ## index(void) \
79 { \
80  AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);\
81 }
82 
92 
93 static void (*const sine_window_init_func_array[])(void) = {
94  init_ff_sine_window_5,
95  init_ff_sine_window_6,
96  init_ff_sine_window_7,
97  init_ff_sine_window_8,
98  init_ff_sine_window_9,
99  init_ff_sine_window_10,
100  init_ff_sine_window_11,
101  init_ff_sine_window_12,
102  init_ff_sine_window_13,
103 };
104 
107  AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT
108 };
109 #endif
110 
112  assert(index >= 5 && index < FF_ARRAY_ELEMS(AAC_RENAME(ff_sine_windows)));
113 #if !CONFIG_HARDCODED_TABLES
114 #ifdef BUILD_TABLES
115  AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);
116 #else
118 #endif
119 #endif
120 }
121 
122 #endif /* AVCODEC_SINEWIN_TABLEGEN_H */
#define SIN_FIX(a)
#define NULL
Definition: coverity.c:32
#define SINETABLE_CONST
Definition: sinewin.h:31
Macro definitions for various function/variable attributes.
float INTFLOAT
Definition: aac_defines.h:88
#define av_cold
Definition: attributes.h:88
SINETABLE_CONST INTFLOAT *const AAC_RENAME(ff_sine_windows)[]
#define AVOnce
Definition: thread.h:172
#define INIT_FF_SINE_WINDOW_INIT_FUNC(index)
SINETABLE(32)
static SDL_Window * window
Definition: ffplay.c:368
av_cold void AAC_RENAME() ff_sine_window_init(INTFLOAT *window, int n)
Generate a sine window.
#define FF_ARRAY_ELEMS(a)
#define sinf(x)
Definition: libm.h:419
#define AV_ONCE_INIT
Definition: thread.h:173
static AVOnce init_sine_window_once[9]
int index
Definition: gxfenc.c:89
common internal and external API header
static void(*const sine_window_init_func_array[])(void)
av_cold void AAC_RENAME() ff_init_ff_sine_windows(int index)
initialize the specified entry of ff_sine_windows
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:175
#define M_PI
Definition: mathematics.h:52
int i
Definition: input.c:407