2 * Header file for hardcoded sine windows
4 * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
6 * This file is part of FFmpeg.
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.
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.
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
23 #ifndef AVCODEC_SINEWIN_TABLEGEN_H
24 #define AVCODEC_SINEWIN_TABLEGEN_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
30 #include "libavcodec/aac_defines.h"
31 #include "libavutil/attributes.h"
32 #include "libavutil/common.h"
34 #if !CONFIG_HARDCODED_TABLES
36 #include "libavutil/thread.h"
50 #include "libavcodec/sinewin_fixed_tables.h"
52 #include "libavcodec/sinewin_tables.h"
57 #define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5)
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),
69 // Generate a sine window.
70 av_cold void AAC_RENAME(ff_sine_window_init)(INTFLOAT *window, int n) {
72 for(i = 0; i < n; i++)
73 window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n))));
76 #if !CONFIG_HARDCODED_TABLES && !defined(BUILD_TABLES)
77 #define INIT_FF_SINE_WINDOW_INIT_FUNC(index) \
78 static void init_ff_sine_window_ ## index(void) \
80 AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);\
83 INIT_FF_SINE_WINDOW_INIT_FUNC(5)
84 INIT_FF_SINE_WINDOW_INIT_FUNC(6)
85 INIT_FF_SINE_WINDOW_INIT_FUNC(7)
86 INIT_FF_SINE_WINDOW_INIT_FUNC(8)
87 INIT_FF_SINE_WINDOW_INIT_FUNC(9)
88 INIT_FF_SINE_WINDOW_INIT_FUNC(10)
89 INIT_FF_SINE_WINDOW_INIT_FUNC(11)
90 INIT_FF_SINE_WINDOW_INIT_FUNC(12)
91 INIT_FF_SINE_WINDOW_INIT_FUNC(13)
93 static void (*const sine_window_init_func_array[])(void) = {
94 init_ff_sine_window_5,
95 init_ff_sine_window_6,
96 init_ff_sine_window_7,
97 init_ff_sine_window_8,
98 init_ff_sine_window_9,
99 init_ff_sine_window_10,
100 init_ff_sine_window_11,
101 init_ff_sine_window_12,
102 init_ff_sine_window_13,
105 static AVOnce init_sine_window_once[9] = {
106 AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT,
107 AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT
111 av_cold void AAC_RENAME(ff_init_ff_sine_windows)(int index) {
112 assert(index >= 5 && index < FF_ARRAY_ELEMS(AAC_RENAME(ff_sine_windows)));
113 #if !CONFIG_HARDCODED_TABLES
115 AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);
117 ff_thread_once(&init_sine_window_once[index - 5], sine_window_init_func_array[index - 5]);
122 #endif /* AVCODEC_SINEWIN_TABLEGEN_H */