/usr/include/SndObj/ADSR.h is in libsndobj-dev 2.6.6.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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
//***********************************************************//
// ADSR.h: interface of the ADSR class //
// //
// //
// //
//***********************************************************//
#ifndef _ADSR_H
#define _ADSR_H
#include "SndObj.h"
class ADSR : public SndObj{
protected:
unsigned long m_count; // keeps track of the time in samples
float m_att; // attack time
float m_maxamp; // max amplitude
float m_dec; // decay time
float m_sus; // sustain amplitude
float m_rel; // release time
unsigned long m_dur; // env duration
short m_sustain; // sustain flag: 1= ON, 0= OFF
public:
ADSR();
ADSR(float att, float maxamp, float dec, float sus, float rel,
float dur, SndObj* InObj = 0, int vecsize=DEF_VECSIZE, float sr=DEF_SR);
~ADSR();
void SetSr(float sr);
void SetMaxAmp (float maxamp){ m_maxamp = maxamp; }
void Sustain(){ m_sustain = 1; }
void Release(){
m_sustain = 0;
m_count = (unsigned long)(m_dur - m_rel) + 1;
}
void Restart() { m_count = 0; }
void SetADSR(float att, float dec, float sus, float rel);
void SetDur(float dur){
m_dur = (unsigned long) (m_sr*dur);
m_count = 0;
}
int Set(char* mess, float value);
short DoProcess();
};
#endif
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