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/* |
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* Header file for hardcoded sine windows |
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* |
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* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_SINEWIN_FIXED_TABLEGEN_H |
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#define AVCODEC_SINEWIN_FIXED_TABLEGEN_H |
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#ifdef BUILD_TABLES |
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#undef DECLARE_ALIGNED |
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#define DECLARE_ALIGNED(align, type, name) type name |
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#else |
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#include "libavutil/mem_internal.h" |
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#endif |
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#define SINETABLE(size) \ |
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static SINETABLE_CONST DECLARE_ALIGNED(32, int, sine_##size##_fixed)[size] |
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#if CONFIG_HARDCODED_TABLES |
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#define init_sine_windows_fixed() |
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#define SINETABLE_CONST const |
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#include "libavcodec/sinewin_fixed_tables.h" |
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#else |
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// do not use libavutil/libm.h since this is compiled both |
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// for the host and the target and config.h is only valid for the target |
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#include <math.h> |
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#include "libavutil/attributes.h" |
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#define SINETABLE_CONST |
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SINETABLE( 128); |
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SINETABLE( 512); |
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SINETABLE(1024); |
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#define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5) |
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// Generate a sine window. |
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static av_cold void sine_window_init_fixed(int *window, int n) |
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{ |
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for (int i = 0; i < n; i++) |
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window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n)))); |
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} |
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static av_cold void init_sine_windows_fixed(void) |
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{ |
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sine_window_init_fixed(sine_128_fixed, 128); |
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sine_window_init_fixed(sine_512_fixed, 512); |
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sine_window_init_fixed(sine_1024_fixed, 1024); |
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} |
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#endif /* CONFIG_HARDCODED_TABLES */ |
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#endif /* AVCODEC_SINEWIN_FIXED_TABLEGEN_H */ |
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