/*

  * 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 "libavcodec/aac_defines.h"

 #include "libavutil/attributes.h"

 #include "libavutil/common.h"

 #if !USE_FIXED
 SINETABLE( 120);
 SINETABLE( 960);
 #endif

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

 SINETABLE(8192);

 #else

 #if USE_FIXED
 #include "libavcodec/sinewin_fixed_tables.h"
 #else

 #include "libavcodec/sinewin_tables.h"

 #endif

 #endif
 
 #if USE_FIXED
 #define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5)
 #else
 #define SIN_FIX(a) a
 #endif

 SINETABLE_CONST INTFLOAT * const AAC_RENAME(ff_sine_windows)[] = {

     NULL, NULL, NULL, NULL, NULL, // unused

     AAC_RENAME(ff_sine_32) , AAC_RENAME(ff_sine_64), AAC_RENAME(ff_sine_128),
     AAC_RENAME(ff_sine_256), AAC_RENAME(ff_sine_512), AAC_RENAME(ff_sine_1024),

     AAC_RENAME(ff_sine_2048), AAC_RENAME(ff_sine_4096), AAC_RENAME(ff_sine_8192),

 };
 
 // Generate a sine window.

 av_cold void AAC_RENAME(ff_sine_window_init)(INTFLOAT *window, int n) {

     int i;
     for(i = 0; i < n; i++)

         window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n))));

 }
 

 av_cold void AAC_RENAME(ff_init_ff_sine_windows)(int index) {
     assert(index >= 0 && index < FF_ARRAY_ELEMS(AAC_RENAME(ff_sine_windows)));

 #if !CONFIG_HARDCODED_TABLES

     AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);

 #endif
 }

 
 #endif /* AVCODEC_SINEWIN_TABLEGEN_H */