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 !USE_FIXED
35 SINETABLE120960(120);
36 SINETABLE120960(960);
37 #endif
38 #if !CONFIG_HARDCODED_TABLES
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.
AAC_RENAME(ff_sine_window_init)70 av_cold void AAC_RENAME(ff_sine_window_init)(INTFLOAT *window, int n) {
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
AAC_RENAME(ff_init_ff_sine_windows)76 av_cold void AAC_RENAME(ff_init_ff_sine_windows)(int index) {
77 assert(index >= 0 && index < FF_ARRAY_ELEMS(AAC_RENAME(ff_sine_windows)));
78 #if !CONFIG_HARDCODED_TABLES
79 AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);
80 #endif
81 }
82
83 #endif /* AVCODEC_SINEWIN_TABLEGEN_H */
84