libaf/window.h

   1 /*
   2  * Copyright (C) 2001 Anders Johansson ajh@atri.curtin.edu.au
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer 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
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 /* Calculates a number of window functions. The following window
  22    functions are currently implemented: Boxcar, Triang, Hanning,
  23    Hamming, Blackman, Flattop and Kaiser. In the function call n is
  24    the number of filter taps and w the buffer in which the filter
  25    coefficients will be stored.
  26 */
  27
  28 #if !defined MPLAYER_DSP_H
  29 # error Never use window.h directly; include dsp.h instead.
  30 #endif
  31
  32 #ifndef MPLAYER_WINDOW_H
  33 #define MPLAYER_WINDOW_H
  34
  35 void af_window_boxcar(int n, FLOAT_TYPE* w);
  36 void af_window_triang(int n, FLOAT_TYPE* w);
  37 void af_window_hanning(int n, FLOAT_TYPE* w);
  38 void af_window_hamming(int n, FLOAT_TYPE* w);
  39 void af_window_blackman(int n, FLOAT_TYPE* w);
  40 void af_window_flattop(int n, FLOAT_TYPE* w);
  41 void af_window_kaiser(int n, FLOAT_TYPE* w, FLOAT_TYPE b);
  42
  43 #endif /* MPLAYER_WINDOW_H */