/usr/include/SndObj/Balance.h is in libsndobj-dev 2.6.7+ds1-1.
This file is owned by root:root, with mode 0o644.
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////////////////////////////////////////////////////////////////////////
// This file is part of the SndObj library
//
// 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
//
// Copyright (c)Victor Lazzarini, 1997-2004
// See License.txt for a disclaimer of all warranties
// and licensing information
//************************************************************//
// Balance.h: interface of the Balance class //
// //
// //
// //
//************************************************************//
#ifndef _BALANCE_H
#define _BALANCE_H
#include "SndObj.h"
class Balance : public SndObj {
protected:
float m_fr;
double m_pow;
double m_pow1;
double m_pow2;
double m_a0, m_a1, m_b1, m_b2;
double* m_delay2;
double* m_delay;
SndObj* m_comp;
float rectify(float val){
return (val < 0 ? val*-1 : val);
}
double filter(double in, double* delay);
public:
void SetInput(SndObj* input1, SndObj* input2){
m_comp = input2;
m_input = input1;
}
void SetLPFreq(float fr);
void SetSr(float sr);
int Set(char* mess, float value);
Balance();
Balance(SndObj* input1, SndObj* input2, float fr=10.f,
int vecsize=DEF_VECSIZE, float sr = DEF_SR);
~Balance();
char* ErrorMessage();
short DoProcess();
int Connect(char* mess, void* input);
};
double inline
Balance::filter(double in, double* delay)
{
double out = 0.f; // output
// filtering
out = m_a0*in + m_a1*delay[2] + m_a0*delay[3]
- m_b1*delay[0] - m_b2*delay[1];
// recirculate the delay line
delay[3] = delay[2]; // past inputs
delay[2] = in;
delay[1] = delay[0]; // past outputs
delay[0] = out;
return(out); // output the float value
}
#endif
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