[PD-cvs] externals/sc4pd/source Rand.cpp,NONE,1.1

[Tim Blechmann]

Update of /cvsroot/pure-data/externals/sc4pd/source
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv8621

Added Files:
	Rand.cpp 
Log Message:
checking in

--- NEW FILE: Rand.cpp ---
/* sc4pd 
   Rand, Rand~

   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: the sounds coming through my open window
   
*/

#include <flext.h>
#include "SC_PlugIn.h"
#include "support.hpp"


#if !defined(FLEXT_VERSION) || (FLEXT_VERSION < 406)
#error You need at least FLEXT version 0.4.6
#endif


/* ------------------------ Rand~ -------------------------------*/

class Rand_ar:
    public flext_dsp
{
    FLEXT_HEADER(Rand_ar,flext_dsp);
    
public:
    Rand_ar(int argc, t_atom *argv);
    
protected:
    virtual void m_signal(int n, t_sample *const *in, t_sample *const *out);
    virtual void m_dsp(int n, t_sample *const *in, t_sample *const *out);
    
private:
    float m_sample;
    float lo;
    float hi;
    RGen rgen;
};

FLEXT_LIB_DSP_V("Rand~",Rand_ar);

Rand_ar::Rand_ar(int argc, t_atom *argv)
{
    AtomList Args(argc,argv);

    if (Args.Count() != 2)
    {
	post("not enough arguments");
	return;
    }
    lo=sc_getfloatarg(Args,0);
    hi=sc_getfloatarg(Args,1);
    
    rgen.init(0); //this should be changed

    AddOutSignal();
}

void Rand_ar::m_dsp(int n, t_sample *const *in, t_sample *const *out)
{
    float range = hi - lo;
    m_sample = rgen.frand() * range + lo;
}


void Rand_ar::m_signal(int n, t_sample *const *in, 
		       t_sample *const *out)
{
    t_sample *nout = *out;
    
    float sample = m_sample;
    
    for (int i = 0; i!= n;++i)
    {
	(*(nout)++) = sample;
    }
}


/* ------------------------ Rand ---------------------------------*/

class Rand_kr:
    public flext_base
{
    FLEXT_HEADER(Rand_kr,flext_base);

public:
    Rand_kr(int argc, t_atom *argv);
    
protected:
    void m_loadbang();

private:
    float lo;
    float hi;
    RGen rgen;
};

FLEXT_LIB_V("Rand",Rand_kr);

Rand_kr::Rand_kr(int argc, t_atom *argv)
{
    AtomList Args(argc,argv);
    if (Args.Count() != 2)
    {
	post("not enough arguments");
	return;
    }
    lo=sc_getfloatarg(Args,0);
    hi=sc_getfloatarg(Args,1);
    
    rgen.init(0);
    
    AddOutFloat();
}

void Rand_kr::m_loadbang()
{
    float range = hi - lo;
    
    ToOutFloat(0,rgen.frand() * range + lo);
}