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authorIOhannes m zmölnig <zmoelnig@iem.at>2015-10-14 15:14:38 +0200
committerIOhannes m zmölnig <zmoelnig@iem.at>2015-10-14 15:14:38 +0200
commit28b7e464fd119b8c848753a1f41070422c463c41 (patch)
tree07449abdf85d8f1fd4068839b974242b429720ca /sc4pd/source/LFSaw.cpp
parent90c6018a9401e38859f733b3521c919e042322b7 (diff)
parent6932ee2d22511226378218992b0005cb01eb235e (diff)
- abstractions/tb - externals/tb
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diff --git a/sc4pd/source/LFSaw.cpp 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;
+ }
+}