60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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* Copyright (c) 2008 Robert Swain
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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_H
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#define AVCODEC_SINEWIN_H
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#include "config.h"
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#include "libavutil/mem.h"
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#if CONFIG_HARDCODED_TABLES
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# define SINETABLE_CONST const
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#else
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# define SINETABLE_CONST
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#endif
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#define SINETABLE(size) \
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SINETABLE_CONST DECLARE_ALIGNED(16, float, ff_sine_##size)[size]
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/**
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* Generate a sine window.
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* @param window pointer to half window
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* @param n size of half window
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*/
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void ff_sine_window_init(float *window, int n);
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/**
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* initialize the specified entry of ff_sine_windows
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*/
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void ff_init_ff_sine_windows(int index);
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extern SINETABLE( 32);
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extern SINETABLE( 64);
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extern SINETABLE( 128);
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extern SINETABLE( 256);
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extern SINETABLE( 512);
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extern SINETABLE(1024);
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extern SINETABLE(2048);
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extern SINETABLE(4096);
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extern SINETABLE_CONST float * const ff_sine_windows[13];
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#endif
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