blob: 4432135f19fc34789f054c547e3e15421ec44b1e
| 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 !CONFIG_HARDCODED_TABLES |
| 35 | SINETABLE( 32); |
| 36 | SINETABLE( 64); |
| 37 | SINETABLE( 128); |
| 38 | SINETABLE( 256); |
| 39 | SINETABLE( 512); |
| 40 | SINETABLE(1024); |
| 41 | SINETABLE(2048); |
| 42 | SINETABLE(4096); |
| 43 | SINETABLE(8192); |
| 44 | #else |
| 45 | #if USE_FIXED |
| 46 | #include "libavcodec/sinewin_fixed_tables.h" |
| 47 | #else |
| 48 | #include "libavcodec/sinewin_tables.h" |
| 49 | #endif |
| 50 | #endif |
| 51 | |
| 52 | #if USE_FIXED |
| 53 | #define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5) |
| 54 | #else |
| 55 | #define SIN_FIX(a) a |
| 56 | #endif |
| 57 | |
| 58 | SINETABLE_CONST INTFLOAT * const AAC_RENAME(ff_sine_windows)[] = { |
| 59 | NULL, NULL, NULL, NULL, NULL, // unused |
| 60 | AAC_RENAME(ff_sine_32) , AAC_RENAME(ff_sine_64), AAC_RENAME(ff_sine_128), |
| 61 | AAC_RENAME(ff_sine_256), AAC_RENAME(ff_sine_512), AAC_RENAME(ff_sine_1024), |
| 62 | AAC_RENAME(ff_sine_2048), AAC_RENAME(ff_sine_4096), AAC_RENAME(ff_sine_8192) |
| 63 | }; |
| 64 | |
| 65 | // Generate a sine window. |
| 66 | av_cold void AAC_RENAME(ff_sine_window_init)(INTFLOAT *window, int n) { |
| 67 | int i; |
| 68 | for(i = 0; i < n; i++) |
| 69 | window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n)))); |
| 70 | } |
| 71 | |
| 72 | av_cold void AAC_RENAME(ff_init_ff_sine_windows)(int index) { |
| 73 | assert(index >= 0 && index < FF_ARRAY_ELEMS(AAC_RENAME(ff_sine_windows))); |
| 74 | #if !CONFIG_HARDCODED_TABLES |
| 75 | AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index); |
| 76 | #endif |
| 77 | } |
| 78 | |
| 79 | #endif /* AVCODEC_SINEWIN_TABLEGEN_H */ |
| 80 |