repositories / deb_ffmpeg.git / blame
| 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 */ |