/*

  * Header file for hardcoded sine windows

  *
  * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * 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.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * 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
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

 #ifndef AVCODEC_SINEWIN_TABLEGEN_H
 #define AVCODEC_SINEWIN_TABLEGEN_H
 

 #include <assert.h>

 // do not use libavutil/libm.h since this is compiled both

 // for the host and the target and config.h is only valid for the target
 #include <math.h>

 #include "libavutil/attributes.h"

 #include "libavutil/common.h"

 
 #if !CONFIG_HARDCODED_TABLES
 SINETABLE(  32);
 SINETABLE(  64);
 SINETABLE( 128);
 SINETABLE( 256);
 SINETABLE( 512);
 SINETABLE(1024);
 SINETABLE(2048);
 SINETABLE(4096);

 SINETABLE(8192);

 #else

 #include "libavcodec/sinewin_tables.h"

 #endif
 
 SINETABLE_CONST float * const ff_sine_windows[] = {
     NULL, NULL, NULL, NULL, NULL, // unused
     ff_sine_32 , ff_sine_64 ,

     ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096, ff_sine_8192

 };
 
 // Generate a sine window.
 av_cold void ff_sine_window_init(float *window, int n) {
     int i;
     for(i = 0; i < n; i++)
         window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n)));
 }
 
 av_cold void ff_init_ff_sine_windows(int index) {

     assert(index >= 0 && index < FF_ARRAY_ELEMS(ff_sine_windows));

 #if !CONFIG_HARDCODED_TABLES
     ff_sine_window_init(ff_sine_windows[index], 1 << index);
 #endif
 }

 
 #endif /* AVCODEC_SINEWIN_TABLEGEN_H */