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/* sc4pd:
support functions
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: Morton Feldman: For John Cage
*/
#ifndef _SC4PD_HPP
#include <flext.h>
#if !defined(FLEXT_VERSION) || (FLEXT_VERSION < 406)
#error You need at least FLEXT version 0.4.6
#endif
#include "SC_PlugIn.h"
#include "support.hpp"
/* this macro has to be redefined to work with flext */
// calculate a slope for control rate interpolation to audio rate.
//#define CALCSLOPE(next,prev) ((next - prev) * unit->mRate->mSlopeFactor)
#undef CALCSLOPE
#define CALCSLOPE(next,prev) ((next - prev) * 1/ Blocksize())
//#define SAMPLERATE (unit->mRate->mSampleRate)
#undef SAMPLERATE
#define SAMPLERATE Samplerate()
//#define BUFLENGTH (unit->mBufLength)
#undef BUFLENGTH
#define BUFLENGTH Blocksize()
/* to make sure the behaviour is consistent: */
#undef ZXP
#define ZXP(z) (*(z)++)
class sc4pd_dsp
: public flext_dsp
{
FLEXT_HEADER(sc4pd_dsp,flext_dsp);
/* some initialisation functions, adapted from SC_Rate.cpp*/
inline float sc_sampledur()
{
return 1 / Samplerate();
}
inline float sc_radianspersample()
{
return twopi / Samplerate();
}
inline float sc_bufduration()
{
return Blocksize() / Samplerate();
}
inline float sc_bufrate()
{
return 1 / sc_bufduration();
}
inline float sc_slopefactor()
{
return 1 / Blocksize();
}
inline int sc_filterloops()
{
return Blocksize() / 3;
}
inline int sc_filterremain()
{
return Blocksize() % 3;
}
inline float sc_filterslope()
{
float f = sc_filterloops();
if (f == 0)
return 0;
else
return 1. / f;
}
};
#define _SC4PD_HPP
#endif
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