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/* sc4pd
public class for several delay objects
Copyright (c) 2004 Tim Blechmann.
This code is derived from:
SuperCollider real time audio synthesis system
Copyright (c) 2002 James McCartney. All rights reserved.
http://www.audiosynth.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.
Based on:
PureData by Miller Puckette and others.
http://www.crca.ucsd.edu/~msp/software.html
FLEXT by Thomas Grill
http://www.parasitaere-kapazitaeten.net/ext
SuperCollider by James McCartney
http://www.audiosynth.com
Coded while listening to:
*/
#include "sc4pd.hpp"
#include "DelayUnit.hpp"
void DelayUnit_ar::DelayUnit_AllocDelayLine()
{
long delaybufsize = (long)ceil(m_maxdelaytime * Samplerate() + 1.f);
delaybufsize = delaybufsize + Blocksize();
delaybufsize = NEXTPOWEROFTWO(delaybufsize); // round up to next power of two
m_fdelaylen = m_idelaylen = delaybufsize;
delete[] m_dlybuf;
m_dlybuf = new float[delaybufsize] ;
m_mask = delaybufsize - 1;
}
void DelayUnit_ar::DelayUnit_Dtor()
{
delete[] m_dlybuf;
}
float DelayUnit_ar::CalcDelay(float delaytime)
{
float next_dsamp = delaytime * Samplerate();
return sc_clip(next_dsamp, 1.f, m_fdelaylen);
}
void DelayUnit_ar::DelayUnit_Reset()
{
m_dlybuf = 0;
DelayUnit_AllocDelayLine();
m_dsamp = CalcDelay(m_delaytime);
m_numoutput = 0;
m_iwrphase = 0;
}
void FeedbackDelay_ar::FeedbackDelay_Reset()
{
DelayUnit_Reset();
m_feedbk = CalcFeedback(m_delaytime, m_decaytime);
}
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