Commit | Line | Data |
---|---|---|
2ba45a60 DM |
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 "libavutil/attributes.h" | |
31 | #include "libavutil/common.h" | |
32 | ||
33 | #if !CONFIG_HARDCODED_TABLES | |
34 | SINETABLE( 32); | |
35 | SINETABLE( 64); | |
36 | SINETABLE( 128); | |
37 | SINETABLE( 256); | |
38 | SINETABLE( 512); | |
39 | SINETABLE(1024); | |
40 | SINETABLE(2048); | |
41 | SINETABLE(4096); | |
42 | SINETABLE(8192); | |
43 | #else | |
44 | #include "libavcodec/sinewin_tables.h" | |
45 | #endif | |
46 | ||
47 | SINETABLE_CONST float * const ff_sine_windows[] = { | |
48 | NULL, NULL, NULL, NULL, NULL, // unused | |
49 | ff_sine_32 , ff_sine_64 , | |
50 | ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096, ff_sine_8192 | |
51 | }; | |
52 | ||
53 | // Generate a sine window. | |
54 | av_cold void ff_sine_window_init(float *window, int n) { | |
55 | int i; | |
56 | for(i = 0; i < n; i++) | |
57 | window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n))); | |
58 | } | |
59 | ||
60 | av_cold void ff_init_ff_sine_windows(int index) { | |
61 | assert(index >= 0 && index < FF_ARRAY_ELEMS(ff_sine_windows)); | |
62 | #if !CONFIG_HARDCODED_TABLES | |
63 | ff_sine_window_init(ff_sine_windows[index], 1 << index); | |
64 | #endif | |
65 | } | |
66 | ||
67 | #endif /* AVCODEC_SINEWIN_TABLEGEN_H */ |