resonance.h

   1 /*
   2   ZynAddSubFX - a software synthesizer
   3
   4   Resonance.h - Resonance
   5   Copyright (C) 2002-2005 Nasca Octavian Paul
   6   Author: Nasca Octavian Paul
   7
   8   This program is free software; you can redistribute it and/or modify
   9   it under the terms of version 2 of the GNU General Public License
  10   as published by the Free Software Foundation.
  11
  12   This program is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License (version 2) for more details.
  16
  17   You should have received a copy of the GNU General Public License (version 2)
  18   along with this program; if not, write to the Free Software Foundation,
  19   Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20
  21 */
  22 #ifndef RESONANCE_H
  23 #define RESONANCE_H
  24
  25 #define N_RES_POINTS 256
  26
  27 struct zyn_resonance
  28 {
  29   bool enabled;                 // whether resonance is enabled
  30   unsigned char points[N_RES_POINTS]; // how many points define the resonance function
  31   unsigned char maxdB;          // how many dB the signal may be amplified
  32   unsigned char centerfreq;     // the center frequency of the res. func.
  33   unsigned char octavesfreq;    // and the number of octaves
  34   unsigned char protectthefundamental; // the fundamental (1-st harmonic) is not damped, even it resonance function is low
  35
  36   float center;                 // center frequency(relative)
  37   float bw;                     // bandwidth(relative)
  38 };
  39
  40 #ifdef __cplusplus
  41 extern "C" {
  42 #endif
  43 #if 0
  44 } /* Adjust editor indent */
  45 #endif
  46
  47 void
  48 zyn_resonance_init(
  49   struct zyn_resonance * resonance_ptr);
  50
  51 void
  52 zyn_resonance_apply(
  53   struct zyn_resonance * resonance_ptr,
  54   int n,
  55   struct zyn_fft_freqs * fftdata_ptr,
  56   float freq);
  57
  58 #if 0
  59 { /* Adjust editor indent */
  60 #endif
  61 #ifdef __cplusplus
  62 } /* extern "C" */
  63 #endif
  64
  65 #if 0
  66   void setpoint(int n,unsigned char p);
  67   void smooth();
  68   void interpolatepeaks(int type);
  69   void randomize(int type);
  70
  71
  72   REALTYPE getfreqpos(REALTYPE freq);
  73   REALTYPE getfreqx(REALTYPE x);
  74   REALTYPE getfreqresponse(REALTYPE freq);
  75   REALTYPE getcenterfreq();
  76   REALTYPE getoctavesfreq();
  77
  78   void set_center(float center);
  79   void set_badnwidth(float bandwidth);
  80 #endif
  81
  82 #endif