1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
|
/*
* db.h
*
* Copyright (C) 2003,2006 Steve Harris, Nicholas Humfrey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Originally Stolen from JAMIN <http://jamin.sf.net/>
*/
#ifndef DB_H
#define DB_H
static inline float
db2lin( float db )
{
if (db <= -90.0f) return 0.0f;
else {
return powf(10.0f, db * 0.05f);
}
}
static inline float
lin2db( float lin )
{
if (lin == 0.0f) return -90.0f;
else return (20.0f * log10f(lin));
}
#endif
|