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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Header file for hardcoded sine windows |
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| 3 | * |
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| 4 | * Copyright (c) 2009 Reimar Döffinger |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #ifndef AVCODEC_SINEWIN_TABLEGEN_H |
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| 24 | #define AVCODEC_SINEWIN_TABLEGEN_H |
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| 25 | |||
| 26 | #include |
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| 27 | // do not use libavutil/libm.h since this is compiled both |
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| 28 | // for the host and the target and config.h is only valid for the target |
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| 29 | #include |
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| 30 | #include "libavutil/attributes.h" |
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| 31 | #include "libavutil/common.h" |
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| 32 | |||
| 33 | #if !CONFIG_HARDCODED_TABLES |
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| 34 | SINETABLE( 32); |
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| 35 | SINETABLE( 64); |
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| 36 | SINETABLE( 128); |
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| 37 | SINETABLE( 256); |
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| 38 | SINETABLE( 512); |
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| 39 | SINETABLE(1024); |
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| 40 | SINETABLE(2048); |
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| 41 | SINETABLE(4096); |
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| 42 | SINETABLE(8192); |
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| 43 | #else |
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| 44 | #include "libavcodec/sinewin_tables.h" |
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| 45 | #endif |
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| 46 | |||
| 47 | SINETABLE_CONST float * const ff_sine_windows[] = { |
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| 48 | NULL, NULL, NULL, NULL, NULL, // unused |
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| 49 | ff_sine_32 , ff_sine_64 , |
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| 50 | ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096, ff_sine_8192 |
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| 51 | }; |
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| 52 | |||
| 53 | // Generate a sine window. |
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| 54 | av_cold void ff_sine_window_init(float *window, int n) { |
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| 55 | int i; |
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| 56 | for(i = 0; i < n; i++) |
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| 57 | window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n))); |
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| 58 | } |
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| 59 | |||
| 60 | av_cold void ff_init_ff_sine_windows(int index) { |
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| 61 | assert(index >= 0 && index < FF_ARRAY_ELEMS(ff_sine_windows)); |
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| 62 | #if !CONFIG_HARDCODED_TABLES |
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| 63 | ff_sine_window_init(ff_sine_windows[index], 1 << index); |
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| 64 | #endif |
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| 65 | } |
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| 66 | |||
| 67 | #endif /* AVCODEC_SINEWIN_TABLEGEN_H */ |