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  1. /*
  2.  * This file is part of FFmpeg.
  3.  *
  4.  * FFmpeg is free software; you can redistribute it and/or
  5.  * modify it under the terms of the GNU Lesser General Public
  6.  * License as published by the Free Software Foundation; either
  7.  * version 2.1 of the License, or (at your option) any later version.
  8.  *
  9.  * FFmpeg is distributed in the hope that it will be useful,
  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12.  * Lesser General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU Lesser General Public
  15.  * License along with FFmpeg; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17.  */
  18.  
  19. #ifndef AVCODEC_KBDWIN_H
  20. #define AVCODEC_KBDWIN_H
  21.  
  22. #include <stdint.h>
  23.  
  24. /**
  25.  * Maximum window size for ff_kbd_window_init.
  26.  */
  27. #define FF_KBD_WINDOW_MAX 1024
  28.  
  29. /**
  30.  * Generate a Kaiser-Bessel Derived Window.
  31.  * @param   window  pointer to half window
  32.  * @param   alpha   determines window shape
  33.  * @param   n       size of half window, max FF_KBD_WINDOW_MAX
  34.  */
  35. void ff_kbd_window_init(float *window, float alpha, int n);
  36. void ff_kbd_window_init_fixed(int32_t *window, float alpha, int n);
  37.  
  38. #endif /* AVCODEC_KBDWIN_H */
  39.