util.h

   1 /*
   2   ZynAddSubFX - a software synthesizer
   3
   4   Util.h - Miscellaneous functions
   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
  23 #ifndef UTIL_H
  24 #define UTIL_H
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29 #if 0
  30 } /* Adjust editor indent */
  31 #endif
  32
  33 // Velocity Sensing function
  34 extern REALTYPE VelF(REALTYPE velocity,unsigned char scaling);
  35
  36 float
  37 zyn_velocity_scale(float velocity, float scaling);
  38
  39 REALTYPE
  40 zyn_get_detune(
  41   signed int type,
  42   signed int octave,
  43   signed int coarse,
  44   float fine);
  45
  46 void
  47 silence_buffer(
  48   zyn_sample_type * buffer,
  49   size_t size);
  50
  51 void
  52 silence_two_buffers(
  53   zyn_sample_type * buffer1,
  54   zyn_sample_type * buffer2,
  55   size_t size);
  56
  57 void
  58 mix_add_two_buffers(
  59   zyn_sample_type * buffer_mix_1,
  60   zyn_sample_type * buffer_mix_2,
  61   zyn_sample_type * buffer1,
  62   zyn_sample_type * buffer2,
  63   size_t size);
  64
  65 void
  66 fadeout_two_buffers(
  67   zyn_sample_type * buffer1,
  68   zyn_sample_type * buffer2,
  69   size_t size);
  70
  71 void
  72 copy_buffer(
  73   zyn_sample_type * buffer_dest,
  74   zyn_sample_type * buffer_src,
  75   size_t size);
  76
  77 void
  78 multiply_buffer(
  79   zyn_sample_type * buffer,
  80   float multiplyer,
  81   size_t size);
  82
  83 /*
  84  * Random generator (0.0..1.0)
  85  */
  86 float
  87 zyn_random();
  88
  89 #define ZYN_BOOL_XOR(p, q) (((p) && !(q)) || (!(p) && (q)))
  90
  91 #if 0
  92 { /* Adjust editor indent */
  93 #endif
  94 #ifdef __cplusplus
  95 } /* extern "C" */
  96 #endif
  97
  98 #endif
  99