From 8e34dec617b67c4b8d8928188d175f850d6a69c4 Mon Sep 17 00:00:00 2001
From: Tim Blechmann <timblech@users.sourceforge.net>
Date: Thu, 9 Sep 2004 08:45:18 +0000
Subject: lfdnoises and interpolating vector/scalar operations

svn path=/trunk/externals/tb/; revision=2021
---
 sc4pd/source/LFDNoise1.cpp | 172 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 sc4pd/source/LFDNoise1.cpp

(limited to 'sc4pd/source/LFDNoise1.cpp')

diff --git a/sc4pd/source/LFDNoise1.cpp b/sc4pd/source/LFDNoise1.cpp
new file mode 100644
index 0000000..8336b80
--- /dev/null
+++ b/sc4pd/source/LFDNoise1.cpp
@@ -0,0 +1,172 @@
+/* sc4pd 
+   LFDNoise1~
+
+   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
+
+ *
+ *  DynNoiseUGens.cpp
+ *  xSC3plugins
+ *
+ *  Created by Alberto de Campo, Sekhar Ramacrishnan, Julian Rohrhuber on Sun May 30 2004.
+ *  Copyright (c) 2004 HfbK. All rights reserved.
+ *
+ *
+
+   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: Phil Minton & Veryan Weston: Ways Past
+   
+*/
+
+#include "sc4pd.hpp"
+
+
+/* ------------------------ LFDNoise1~ -------------------------------*/
+
+class LFDNoise1_ar:
+    public sc4pd_dsp
+{
+    FLEXT_HEADER(LFDNoise1_ar,sc4pd_dsp);
+    
+public:
+    LFDNoise1_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);
+
+    void m_seed(int i)
+    {
+	rgen.init(i);
+    }
+
+    void m_set(float f)
+    {
+	m_freq = f;
+    }
+    
+private:
+    RGen rgen;
+    float m_freq;
+    float m_prevlevel;
+    float m_nextlevel;
+    float m_phase;
+    float m_smpdur;
+    
+    bool m_ar;
+
+    FLEXT_CALLBACK_I(m_seed);
+    FLEXT_CALLBACK_F(m_set);
+};
+
+FLEXT_LIB_DSP_V("LFDNoise1~",LFDNoise1_ar);
+
+LFDNoise1_ar::LFDNoise1_ar(int argc, t_atom *argv)
+{
+    FLEXT_ADDMETHOD_(0,"seed",m_seed);
+    FLEXT_ADDMETHOD_(0,"set",m_set);
+
+    //parse arguments
+    AtomList Args(argc,argv);
+
+    m_freq = sc_getfloatarg(Args,0);
+
+    rgen.init(timeseed());
+
+    m_phase=0.f;
+    m_prevlevel=0.f;
+    m_nextlevel = rgen.frand2();
+    
+    
+    m_ar = sc_ar(Args);
+    
+    if (m_ar)
+	AddInSignal("freqency");
+    else
+	AddInSignal("\"set\" frequency");
+    AddOutSignal();
+}    
+
+void LFDNoise1_ar::m_dsp(int n, t_sample *const *in, 
+			 t_sample *const *out)
+{
+    m_smpdur = sc_sampledur();
+}
+
+
+void LFDNoise1_ar::m_signal(int n, t_sample *const *in, 
+			    t_sample *const *out)
+{
+    t_sample *nout = *out;
+
+    float prevLevel = m_prevlevel;
+    float nextLevel = m_nextlevel;
+    float phase = m_phase;
+    
+    RGET;
+
+    if (m_ar)
+    {
+	t_sample *nin = *in;
+	float smpdur = m_smpdur;
+	for (int i = 0; i!= n; ++i)
+	{
+	    phase -= ZXP(nin) * smpdur;
+	    if (phase <= 0) 
+	    {
+		phase = sc_wrap(phase, 0.f, 1.f);
+		prevLevel = nextLevel;
+		nextLevel = frand2(s1,s2,s3);
+	    }
+	    ZXP(nout) = nextLevel + ( phase * (prevLevel - nextLevel) );
+	}
+    }
+    else 
+    {
+	float dphase = m_smpdur * m_freq;
+	for (int i = 0; i!= n; ++i)
+	{
+	    phase -= dphase;
+	    if (phase <= 0) 
+	    {
+		phase = sc_wrap(phase, 0.f, 1.f);
+		prevLevel = nextLevel;
+		nextLevel = frand2(s1,s2,s3);
+	    }
+	    ZXP(nout) = nextLevel + ( phase * (prevLevel - nextLevel) );
+	}
+    }
+
+    m_prevlevel = prevLevel;
+    m_nextlevel = nextLevel;
+    m_phase = phase;
+    
+    RPUT;
+}
+
+
-- 
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