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/***************************************************************************
* Copyright (C) 2011 by Pere R�fols Soler *
* sapista2@gmail.com *
* *
* 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. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
/***************************************************************************
This file contains a VU meter implementation
****************************************************************************/
#include "vu.h"
//#include <stdio.h>
#include <stdlib.h>
//Constant to dBu conversion is sqrt(2)
#define CONSTANT_VU 1.4142136
//Initialize the VU meter
Vu *VuInit(double rate)
{
Vu *vu = (Vu *)malloc(sizeof(Vu));
vu->vu_value = 0.0;
vu->vu_max = 0.0;
vu->m_min = (1.0 / 256);
vu->m_decay = exp( -1.0 / rate);
return vu;
}
//Destroy a Vu instance
void VuClean(Vu *vu){
free(vu);
}
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