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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 SINETABLE( 32);
36 SINETABLE( 64);
37 SINETABLE( 128);
38 SINETABLE( 256);
39 SINETABLE( 512);
40 SINETABLE(1024);
41 SINETABLE(2048);
42 SINETABLE(4096);
43 SINETABLE(8192);
44 #else
45 #if USE_FIXED
46 #include "libavcodec/sinewin_fixed_tables.h"
47 #else
48 #include "libavcodec/sinewin_tables.h"
49 #endif
50 #endif
51 
52 #if USE_FIXED
53 #define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5)
54 #else
55 #define SIN_FIX(a) a
56 #endif
57 
58 SINETABLE_CONST INTFLOAT * const AAC_RENAME(ff_sine_windows)[] = {
59  NULL, NULL, NULL, NULL, NULL, // unused
60  AAC_RENAME(ff_sine_32) , AAC_RENAME(ff_sine_64), AAC_RENAME(ff_sine_128),
61  AAC_RENAME(ff_sine_256), AAC_RENAME(ff_sine_512), AAC_RENAME(ff_sine_1024),
62  AAC_RENAME(ff_sine_2048), AAC_RENAME(ff_sine_4096), AAC_RENAME(ff_sine_8192)
63 };
64 
65 // Generate a sine window.
67  int i;
68  for(i = 0; i < n; i++)
69  window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n))));
70 }
71 
73  assert(index >= 0 && index < FF_ARRAY_ELEMS(AAC_RENAME(ff_sine_windows)));
74 #if !CONFIG_HARDCODED_TABLES
75  AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);
76 #endif
77 }
78 
79 #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:85
#define av_cold
Definition: attributes.h:82
SINETABLE_CONST INTFLOAT *const AAC_RENAME(ff_sine_windows)[]
SINETABLE(32)
static SDL_Window * window
Definition: ffplay.c:364
av_cold void AAC_RENAME() ff_sine_window_init(INTFLOAT *window, int n)
Generate a sine window.
int n
Definition: avisynth_c.h:684
#define FF_ARRAY_ELEMS(a)
#define sinf(x)
Definition: libm.h:419
int index
Definition: gxfenc.c:89
common internal and external API header
av_cold void AAC_RENAME() ff_init_ff_sine_windows(int index)
initialize the specified entry of ff_sine_windows
#define M_PI
Definition: mathematics.h:52