1 files changed, 109 insertions, 0 deletions
diff --git a/cyclone/sickle/spike.c b/cyclone/sickle/spike.c
new file mode 100644
index 0000000..13f9361
--- /dev/null
+++ b/cyclone/sickle/spike.c
@@ -0,0 +1,109 @@
+/* Copyright (c) 2002-2003 krzYszcz and others.
+ * For information on usage and redistribution, and for a DISCLAIMER OF ALL
+ * WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+#include "m_pd.h"
+#include "sickle/sic.h"
+
+typedef struct _spike
+{
+    t_sic     x_sic;
+    t_float   x_last;
+    int       x_count;
+    int       x_precount;
+    int       x_nwait;
+    float     x_waittime;
+    float     x_ksr;
+    float     x_rcpksr;
+    t_clock  *x_clock;
+} t_spike;
+
+static t_class *spike_class;
+
+static void spike_tick(t_spike *x)
+{
+    outlet_float(((t_object *)x)->ob_outlet, x->x_count * x->x_rcpksr);
+    x->x_count = x->x_precount;
+}
+
+static void spike_ft1(t_spike *x, t_floatarg f)
+{
+    if ((x->x_waittime = f) < 0.)
+	x->x_waittime = 0.;
+    x->x_nwait = (int)(x->x_waittime * x->x_ksr);
+}
+
+static t_int *spike_perform(t_int *w)
+{
+    t_spike *x = (t_spike *)(w[1]); 
+    int nblock = (int)(w[2]);
+    t_float *in = (t_float *)(w[3]);
+    t_float last = x->x_last;
+    int count = x->x_count;
+    int nwait = x->x_nwait;
+    if (count + nblock > nwait)
+    {
+	/* LATER efficiency tricks */
+	while (nblock--)
+	{
+	    float f = *in++;
+	    if (last == 0. && f != 0.  /* CHECKED zero-to-nonzero */
+		&& count  /* CHECKED no firing at startup */
+		&& count >= nwait)
+	    {
+		clock_delay(x->x_clock, 0);
+		x->x_last = in[nblock - 1];
+		x->x_count = count;
+		x->x_precount = nblock;
+		return (w + 4);
+	    }
+	    count++;
+	    last = f;
+	}
+	x->x_last = last;
+	x->x_count = count;
+    }
+    else
+    {
+	x->x_last = in[nblock - 1];
+	x->x_count += nblock;
+    }
+    return (w + 4);
+}
+
+static void spike_dsp(t_spike *x, t_signal **sp)
+{
+    x->x_ksr = sp[0]->s_sr * 0.001;
+    x->x_rcpksr = 1000.0 / sp[0]->s_sr;
+    x->x_nwait = (int)(x->x_waittime * x->x_ksr);
+    dsp_add(spike_perform, 3, x, sp[0]->s_n, sp[0]->s_vec);
+}
+
+static void spike_free(t_spike *x)
+{
+    if (x->x_clock) clock_free(x->x_clock);
+}
+
+static void *spike_new(t_floatarg f)
+{
+    t_spike *x = (t_spike *)pd_new(spike_class);
+    x->x_last = 0.;
+    x->x_ksr = sys_getsr() * 0.001;
+    spike_ft1(x, f);
+    inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
+    outlet_new((t_object *)x, &s_float);
+    x->x_clock = clock_new(x, (t_method)spike_tick);
+    return (x);
+}
+
+void spike_tilde_setup(void)
+{
+    spike_class = class_new(gensym("spike~"),
+			    (t_newmethod)spike_new,
+			    (t_method)spike_free,
+			    sizeof(t_spike), 0,
+			    A_DEFFLOAT, 0);
+    sic_setup(spike_class, spike_dsp, SIC_FLOATTOSIGNAL);
+    class_addmethod(spike_class, (t_method)spike_ft1,
+		    gensym("ft1"), A_FLOAT, 0);
+}