Merge branchesHEADsvn2git-headmaster

- abstractions/tb
- externals/tb

1 files changed, 256 insertions, 0 deletions

diff --git a/sc4pd/source/LFSaw.cpp b/sc4pd/source/LFSaw.cpp
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+++ b/sc4pd/source/LFSaw.cpp
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+/* sc4pd 
+   LFSaw, LFSaw~
+
+   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: Keith Rowe & Oren Ambarchi: Flypaper
+   
+*/
+
+#include "sc4pd.hpp"
+
+
+/* ------------------------ LFSaw~ -------------------------------*/
+
+class LFSaw_ar:
+    public sc4pd_dsp
+{
+    FLEXT_HEADER(LFSaw_ar,sc4pd_dsp);
+    
+public:
+    LFSaw_ar(int argc, t_atom *argv);
+    
+protected:
+    virtual void m_signal(int n, t_sample *const *in, t_sample *const *out)
+    {
+	m_signal_fun(n,in,out);
+    }
+    virtual void m_dsp(int n, t_sample *const *in, t_sample *const *out);
+
+    void m_set(float f)
+    {
+	m_freq=f;
+    }
+    
+    void m_ar()
+    {
+	SETSIGFUN(m_signal_fun,SIGFUN(m_signal_ar));
+    }
+
+    void m_kr()
+    {
+	SETSIGFUN(m_signal_fun,SIGFUN(m_signal_kr));
+    }
+
+private:
+    double mPhase;
+    float mFreqMul;
+    float m_freq;      //for kr arguments
+
+    DEFSIGCALL (m_signal_fun);
+    DEFSIGFUN (m_signal_ar);
+    DEFSIGFUN (m_signal_kr);
+    
+    FLEXT_CALLBACK_F(m_set);
+    FLEXT_CALLBACK(m_ar);
+    FLEXT_CALLBACK(m_kr);
+};
+
+FLEXT_LIB_DSP_V("LFSaw~",LFSaw_ar);
+
+LFSaw_ar::LFSaw_ar(int argc, t_atom *argv)
+{
+    FLEXT_ADDMETHOD_(0,"freq",m_set);
+    FLEXT_ADDMETHOD_(0,"ar",m_ar);
+    FLEXT_ADDMETHOD_(0,"kr",m_kr);
+
+    //parse arguments
+    AtomList Args(argc,argv);
+    
+    m_freq = sc_getfloatarg(Args,0);
+    
+    if(sc_ar(Args))
+	SETSIGFUN(m_signal_fun,SIGFUN(m_signal_ar));
+    else // if not given, use control rate
+	SETSIGFUN(m_signal_fun,SIGFUN(m_signal_kr)); 
+    
+    AddOutSignal();
+}    
+
+void LFSaw_ar::m_dsp(int n, t_sample *const *in, t_sample *const *out)
+{
+    mFreqMul = 2 / Samplerate();
+}
+
+void LFSaw_ar::m_signal_ar(int n, t_sample *const *in, 
+	 		   t_sample *const *out)
+{
+    t_sample *freq = *in;
+    t_sample *xout = *out;
+    
+    float freqmul = mFreqMul;
+    double phase = mPhase;
+    
+    for (int i = 0; i!= n;++i)
+    {
+	float z = phase; // out must be written last for in place operation
+	phase += (*(freq)++) * freqmul;
+	if (phase >= 1.f) 
+	    phase -= 2.f;
+	else 
+	    if (phase <= -1.f) 
+		phase += 2.f;
+	(*(xout)++) = z;
+    }
+
+    mPhase=phase;
+}
+
+
+void LFSaw_ar::m_signal_kr(int n, t_sample *const *in, 
+			   t_sample *const *out)
+{
+    t_sample *xout = *out;
+    
+    float freq = m_freq * mFreqMul;
+    double phase = mPhase;
+    
+    if (freq >= 0.f) 
+    {
+	for (int i = 0; i!= n;++i)
+	{
+	    (*(xout)++) = phase;
+	    phase += freq;
+	    if (phase >= 1.f) phase -= 2.f;
+	}
+    }
+    else
+    {
+	for (int i = 0; i!= n;++i)
+	{
+	    (*(xout)++) = phase;
+	    phase += freq;
+	    if (phase <= -1.f) phase += 2.f;
+	}
+    }
+
+    mPhase=phase;
+}
+
+/* ------------------------ LFSaw ---------------------------------*/
+
+class LFSaw_kr:
+    public flext_base
+{
+    FLEXT_HEADER(LFSaw_kr,flext_base);
+
+public:
+    LFSaw_kr(int argc, t_atom *argv);
+    
+protected:
+    void m_perform(void*);
+
+    void m_set(float f)
+    {
+	m_freq_set = f;
+	m_freq = f * mFreqMul;
+    }
+
+    void m_set_kr(float f)
+    {
+	if (f != 0)
+	{
+	    dt = f * 0.001;
+ 	    mFreqMul = 2*dt;
+	    m_freq = m_freq_set * mFreqMul;
+	    m_timer.Reset();
+	    m_timer.Periodic(dt);
+	}
+    }
+
+private:
+    double mPhase;
+    float mFreqMul;
+    float m_freq;
+    float dt;
+    float m_freq_set;
+
+    Timer m_timer;
+
+    FLEXT_CALLBACK_F(m_set_kr);
+    FLEXT_CALLBACK_F(m_set);
+    FLEXT_CALLBACK_T(m_perform);
+};
+
+
+FLEXT_LIB_V("LFSaw",LFSaw_kr);
+
+LFSaw_kr::LFSaw_kr(int argc, t_atom *argv)
+{
+    FLEXT_ADDMETHOD(0,m_set);
+    FLEXT_ADDMETHOD_(0,"kr",m_set_kr);
+    //    FLEXT_ADDBANG(0,m_perform);
+    FLEXT_ADDTIMER(m_timer,m_perform);
+
+    AddOutFloat();
+
+    //parse arguments
+    AtomList Args(argc,argv);
+
+    m_freq_set = sc_getfloatarg(Args,0);
+    
+    dt = sc_getfloatarg(Args,1) * 0.001;
+    
+    if (dt == 0 )
+	dt = 0.02;  // 20 ms as default control rate as in line
+    mFreqMul = 2 * dt; /* test this !!! */
+    
+    m_freq = m_freq_set * mFreqMul;
+    
+    m_timer.Periodic(dt);
+    
+}
+
+void LFSaw_kr::m_perform(void*)
+{
+    if (m_freq >= 0.f) 
+    {
+	ToOutFloat(0,mPhase);
+	mPhase += m_freq;
+	if (mPhase >= 1.f) mPhase -= 2.f;
+    }
+    else
+    {
+	ToOutFloat(0,mPhase);
+	mPhase += m_freq;
+	if (mPhase <= -1.f) mPhase += 2.f;
+    }
+}