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  1. /*
  2.  * Copyright (c) 2008 Robert Swain
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #ifndef AVCODEC_SINEWIN_H
  22. #define AVCODEC_SINEWIN_H
  23.  
  24. #include "config.h"
  25. #include "libavutil/mem.h"
  26. #include "libavcodec/aac_defines.h"
  27.  
  28. #if CONFIG_HARDCODED_TABLES
  29. #   define SINETABLE_CONST const
  30. #else
  31. #   define SINETABLE_CONST
  32. #endif
  33.  
  34. #ifndef USE_FIXED
  35. #define USE_FIXED 0
  36. #endif
  37.  
  38. #define SINETABLE(size) \
  39.     SINETABLE_CONST DECLARE_ALIGNED(32, INTFLOAT, AAC_RENAME(ff_sine_##size))[size]
  40.  
  41. /**
  42.  * Generate a sine window.
  43.  * @param   window  pointer to half window
  44.  * @param   n       size of half window
  45.  */
  46. void AAC_RENAME(ff_sine_window_init)(INTFLOAT *window, int n);
  47.  
  48. /**
  49.  * initialize the specified entry of ff_sine_windows
  50.  */
  51. void AAC_RENAME(ff_init_ff_sine_windows)(int index);
  52.  
  53. extern SINETABLE(  32);
  54. extern SINETABLE(  64);
  55. extern SINETABLE( 128);
  56. extern SINETABLE( 256);
  57. extern SINETABLE( 512);
  58. extern SINETABLE(1024);
  59. extern SINETABLE(2048);
  60. extern SINETABLE(4096);
  61. extern SINETABLE(8192);
  62.  
  63. extern SINETABLE_CONST INTFLOAT * const AAC_RENAME(ff_sine_windows)[14];
  64.  
  65. #endif /* AVCODEC_SINEWIN_H */
  66.