1 files changed, 153 insertions, 0 deletions
diff --git a/sc4pd/source/Crackle.cpp b/sc4pd/source/Crackle.cpp
new file mode 100644
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+++ b/sc4pd/source/Crackle.cpp
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+/* sc4pd 
+   Crackle, Crackle~
+
+   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: David S. Ware: Threads
+   
+*/
+
+#include "sc4pd.hpp"
+
+/* ------------------------ Crackle~ -------------------------------*/
+
+class Crackle_ar:
+    public sc4pd_dsp
+{
+    FLEXT_HEADER(Crackle_ar,sc4pd_dsp);
+    
+public:
+    Crackle_ar(int argc, t_atom *argv);
+    
+protected:
+    virtual void m_signal(int n, t_sample *const *in, t_sample *const *out);
+    
+    void m_set(float f)
+    {
+	m_paramf = f;
+    }
+
+private:
+    FLEXT_CALLBACK_F(m_set);
+    float m_paramf;
+    float m_y1, m_y2;
+};
+
+FLEXT_LIB_DSP_V("Crackle~",Crackle_ar);
+
+Crackle_ar::Crackle_ar(int argc, t_atom *argv)
+    : m_y1(0.3f),m_y2(0.f)
+{
+    FLEXT_ADDMETHOD_(0,"parameter",m_set);
+    //parse arguments
+    AtomList Args(argc,argv);
+    m_paramf=sc_getfloatarg(Args,0);
+    
+    if (m_paramf == 0)
+	m_paramf = 1;
+
+    AddOutSignal();
+}    
+
+
+void Crackle_ar::m_signal(int n, t_sample *const *in, 
+			       t_sample *const *out)
+{
+    t_sample *nout = *out;
+    
+    float paramf = m_paramf;
+    float y1 = m_y1;
+    float y2 = m_y2;
+    float y0;
+
+    for (int i = 0; i!= n;++i)
+    {
+	(*(nout)++) = y0 = fabs(y1 * paramf - y2 - 0.05f);
+	y2 = y1; 
+	y1 = y0;
+    }
+
+    m_y1=y1;
+    m_y2=y2;
+}
+
+
+/* ------------------------ Crackle ---------------------------------*/
+
+class Crackle_kr:
+    public flext_base
+{
+    FLEXT_HEADER(Crackle_kr,flext_base);
+
+public:
+    Crackle_kr(int argc, t_atom *argv);
+    
+protected:
+    void m_perform();
+
+    void m_set(float f)
+    {
+	m_paramf = f;
+    }
+
+private:
+    float m_paramf;
+    float m_y1, m_y2;
+    FLEXT_CALLBACK(m_perform);
+    FLEXT_CALLBACK_F(m_set);
+};
+
+FLEXT_LIB_V("Crackle",Crackle_kr);
+
+Crackle_kr::Crackle_kr(int argc, t_atom *argv)
+    : m_y1(0.3f),m_y2(0.f)
+{
+    FLEXT_ADDBANG(0,m_perform);
+    FLEXT_ADDMETHOD_(0,"parameter",m_set);
+    
+    //parse arguments
+    AtomList Args(argc,argv);
+    m_paramf=sc_getfloatarg(Args,0);
+    
+    if (m_paramf == 0)
+	m_paramf = 1;
+    
+    AddOutFloat();
+}
+
+void Crackle_kr::m_perform()
+{
+    float y0 = fabs(m_y1 * m_paramf - m_y2 - 0.05f);
+    m_y2 = m_y1; 
+    m_y1 = y0;
+    
+    ToOutFloat(0,y0);
+}