libavcodec/sinewin.h
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 /*
  * Copyright (c) 2008 Robert Swain
  *
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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
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
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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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * 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
  */
 
 #ifndef AVCODEC_SINEWIN_H
 #define AVCODEC_SINEWIN_H
 
 #include "config.h"
 #include "libavutil/mem.h"
 
 #if CONFIG_HARDCODED_TABLES
 #   define SINETABLE_CONST const
 #else
 #   define SINETABLE_CONST
 #endif
 
 #define SINETABLE(size) \
     SINETABLE_CONST DECLARE_ALIGNED(16, float, ff_sine_##size)[size]
 
 /**
  * Generate a sine window.
  * @param   window  pointer to half window
  * @param   n       size of half window
  */
 void ff_sine_window_init(float *window, int n);
 
 /**
  * initialize the specified entry of ff_sine_windows
  */
 void ff_init_ff_sine_windows(int index);
 
 extern SINETABLE(  32);
 extern SINETABLE(  64);
 extern SINETABLE( 128);
 extern SINETABLE( 256);
 extern SINETABLE( 512);
 extern SINETABLE(1024);
 extern SINETABLE(2048);
 extern SINETABLE(4096);
 
 extern SINETABLE_CONST float * const ff_sine_windows[13];
 
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 #endif /* AVCODEC_SINEWIN_H */