libaf/window.h

   1 /*=============================================================================
   2 //
   3 //  This software has been released under the terms of the GNU General Public
   4 //  license. See http://www.gnu.org/copyleft/gpl.html for details.
   5 //
   6 //  Copyright 2001 Anders Johansson ajh@atri.curtin.edu.au
   7 //
   8 //=============================================================================
   9 */
  10
  11 /* Calculates a number of window functions. The following window
  12    functions are currently implemented: Boxcar, Triang, Hanning,
  13    Hamming, Blackman, Flattop and Kaiser. In the function call n is
  14    the number of filter taps and w the buffer in which the filter
  15    coefficients will be stored.
  16 */
  17
  18 #if !defined MPLAYER_DSP_H
  19 # error Never use window.h directly; include dsp.h instead.
  20 #endif
  21
  22 #ifndef MPLAYER_WINDOW_H
  23 #define MPLAYER_WINDOW_H
  24
  25 extern void af_window_boxcar(int n, FLOAT_TYPE* w);
  26 extern void af_window_triang(int n, FLOAT_TYPE* w);
  27 extern void af_window_hanning(int n, FLOAT_TYPE* w);
  28 extern void af_window_hamming(int n, FLOAT_TYPE* w);
  29 extern void af_window_blackman(int n, FLOAT_TYPE* w);
  30 extern void af_window_flattop(int n, FLOAT_TYPE* w);
  31 extern void af_window_kaiser(int n, FLOAT_TYPE* w, FLOAT_TYPE b);
  32
  33 #endif /* MPLAYER_WINDOW_H */