1 files changed, 67 insertions, 0 deletions
diff --git a/source/chop~.c b/source/chop~.c
new file mode 100644
index 0000000..df2786c
--- /dev/null
+++ b/source/chop~.c
@@ -0,0 +1,67 @@
+/* sIgpAck
+ * for
+ * pure-data
+ * www.weiss-archiv.de */
+
+#include "m_pd.h"
+#ifdef _MSC_VER
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+// ------------------------ sp.chop~ -----------------------------
+// signal chopping modulator
+
+static t_class *chop_tilde_class;
+
+typedef struct _chop_tilde
+{
+    t_object x_obj;
+	t_sample x_factor;
+	float x_f;
+} t_chop_tilde;
+
+static void *chop_tilde_new(t_floatarg factor)
+{
+    t_chop_tilde *x = (t_chop_tilde *)pd_new(chop_tilde_class);
+	x->x_factor = factor;
+    outlet_new(&x->x_obj, gensym("signal"));
+	inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+	floatinlet_new(&x->x_obj, &x->x_factor);
+	x->x_f = 0;
+	if(factor) x->x_factor = factor;
+	else x->x_factor = 0;
+    return (x);
+}
+
+static t_int *chop_tilde_perform(t_int *w)
+{
+	t_chop_tilde *x = (t_chop_tilde *)(w[1]);
+    t_float *in1 = (t_float *)(w[2]);
+	t_float *in2 = (t_float *)(w[3]);
+    t_float *out = (t_float *)(w[4]);
+    int n = (int)(w[5]);
+	float f, m, value;
+    while (n--)
+    {
+		f = *in1++;
+		m = *in2++;
+		if(m > 0.) value = f * x->x_factor;
+		else value = f;
+		*out++ = value;
+    }
+    return (w+6);
+}
+
+static void chop_tilde_dsp(t_chop_tilde *x, t_signal **sp)
+{
+    dsp_add(chop_tilde_perform, 5, x, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[0]->s_n);
+}
+
+void chop_tilde_setup(void)
+{
+    chop_tilde_class = class_new(gensym("sp.chop~"), (t_newmethod)chop_tilde_new, 0,
+    	sizeof(t_chop_tilde), 0, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(chop_tilde_class, t_chop_tilde, x_f);
+    class_addmethod(chop_tilde_class, (t_method)chop_tilde_dsp, gensym("dsp"), 0);
+}