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/libavcodec/sinewin.h

http://github.com/FFmpeg/FFmpeg
C Header | 70 lines | 32 code | 11 blank | 27 comment | 0 complexity | c8b55b471be0f6f8a6cc29cbf27c79f5 MD5 | raw file
 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.h"
26#include "libavcodec/aac_defines.h"
27
28#if CONFIG_HARDCODED_TABLES
29#   define SINETABLE_CONST const
30#else
31#   define SINETABLE_CONST
32#endif
33
34#ifndef USE_FIXED
35#define USE_FIXED 0
36#endif
37
38#define SINETABLE(size) \
39    SINETABLE_CONST DECLARE_ALIGNED(32, INTFLOAT, AAC_RENAME(ff_sine_##size))[size]
40
41#define SINETABLE120960(size) \
42    DECLARE_ALIGNED(32, INTFLOAT, AAC_RENAME(ff_sine_##size))[size]
43
44/**
45 * Generate a sine window.
46 * @param   window  pointer to half window
47 * @param   n       size of half window
48 */
49void AAC_RENAME(ff_sine_window_init)(INTFLOAT *window, int n);
50
51/**
52 * initialize the specified entry of ff_sine_windows
53 */
54void AAC_RENAME(ff_init_ff_sine_windows)(int index);
55
56extern SINETABLE(  32);
57extern SINETABLE(  64);
58extern SINETABLE120960(120);
59extern SINETABLE( 128);
60extern SINETABLE( 256);
61extern SINETABLE( 512);
62extern SINETABLE120960(960);
63extern SINETABLE(1024);
64extern SINETABLE(2048);
65extern SINETABLE(4096);
66extern SINETABLE(8192);
67
68extern SINETABLE_CONST INTFLOAT * const AAC_RENAME(ff_sine_windows)[16];
69
70#endif /* AVCODEC_SINEWIN_H */