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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.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 | */ | |
46 | void ff_init_ff_sine_windows(int index); | |
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[14]; | |
59 | ||
60 | #endif /* AVCODEC_SINEWIN_H */ |