lib/rbcodec/dsp/eq.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
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   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006-2007 Thom Johansen
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #ifndef _EQ_H
  22 #define _EQ_H
  23
  24 /* => support from 3 to 32 bands */
  25 #define EQ_NUM_BANDS 10
  26
  27 struct eq_band_setting
  28 {
  29     int cutoff; /* Hz */
  30     int q;
  31     int gain;   /* +/- dB */
  32 };
  33
  34 /** DSP interface **/
  35 void dsp_set_eq_precut(int precut);
  36 void dsp_set_eq_coefs(int band, const struct eq_band_setting *setting);
  37 void dsp_eq_enable(bool enable);
  38
  39 #endif /* _EQ_H */