/usr/include/SndObj/DelayLine.h is in libsndobj-dev 2.6.7+ds1-1.
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
//************************************************************//
// DelayLine.h: interface of the Delayline class //
// //
// //
// //
//************************************************************//
#ifndef _DELAYLINE_H
#define _DELAYLINE_H
#include "SndObj.h"
class DelayLine : public SndObj
{
protected:
float* m_delay; // delay line
float m_delaytime; // delay time
long m_size; // delay line size in samples
long m_wpointer; // write pointer
long m_rpointer; // read pointer
void PutSample(float sample){
m_delay[m_wpointer] = sample;
m_wpointer = (m_wpointer != m_size-1 ? m_wpointer+1 : 0);
}
float GetSample(){
float out;
out = m_delay[(m_rpointer%=m_size)];
m_rpointer++;
return out;
}
float GetSample(float pos){
int p = (int) pos, pp1 = (p == m_size-1 ? 0 : p+1);
float frac = pos - p;
return m_delay[p] + frac*(m_delay[pp1] - m_delay[p]);
}
float GetSample(long pos){
return m_delay[pos];
}
public:
DelayLine();
DelayLine(float delaytime, SndObj* InObj, int vecsize=DEF_VECSIZE, float sr=DEF_SR);
~DelayLine();
float* Buffer() { return m_delay; }
long GetWritePointerPos() { return m_wpointer; }
float GetDelayTime() { return m_size/m_sr; }
void SetSr(float sr);
void Reset();
virtual void SetDelayTime(float delaytime);
int Set(char* mess, float value);
short DoProcess();
char* ErrorMessage();
};
#endif
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