1 files changed, 78 insertions, 0 deletions
diff --git a/cyclone/sickle/zerox.c b/cyclone/sickle/zerox.c
new file mode 100644
index 0000000..95b35d6
--- /dev/null
+++ b/cyclone/sickle/zerox.c
@@ -0,0 +1,78 @@
+/* Copyright (c) 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"
+
+#define ZEROX_DEFVOLUME  1.
+
+typedef struct _zerox
+{
+    t_sic    x_sic;
+    t_float  x_volume;
+    int      x_lastsign;
+} t_zerox;
+
+static t_class *zerox_class;
+
+static void zerox_set(t_zerox *x, t_floatarg f)
+{
+    x->x_volume = f;  /* CHECKED anything goes (including 0.) */
+}
+
+static t_int *zerox_perform(t_int *w)
+{
+    t_zerox *x = (t_zerox *)(w[1]);
+    int nblock = (int)(w[2]);
+    t_float *in = (t_float *)(w[3]);
+    t_float *out1 = (t_float *)(w[4]);
+    t_float *out2 = (t_float *)(w[5]);
+    t_float volume = x->x_volume;
+    int lastsign = x->x_lastsign;
+    int i = nblock;
+    int count = 0;
+    t_float fcount;
+    while (i--)
+    {
+	/* CHECKED -1 -> 0 and 0 -> -1 are hits, 1 -> 0, 0 -> 1 are not */
+	int sign = (*in++ < 0 ? 1. : 0.);  /* LATER read the sign bit */
+	if (sign != lastsign)
+	{
+	    count++;
+	    *out2++ = volume;
+	    lastsign = sign;
+	}
+	else *out2++ = 0.;
+    }
+    fcount = (t_float)count;
+    while (nblock--) *out1++ = fcount;
+    x->x_lastsign = lastsign;
+    return (w + 6);
+}
+
+static void zerox_dsp(t_zerox *x, t_signal **sp)
+{
+    dsp_add(zerox_perform, 5, x, sp[0]->s_n,
+	    sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec);
+}
+
+static void *zerox_new(t_floatarg f)
+{
+    t_zerox *x = (t_zerox *)pd_new(zerox_class);
+    x->x_volume = (f == 0. ? ZEROX_DEFVOLUME : f);
+    x->x_lastsign = 0;  /* CHECKED the very first sample hits if negative */
+    outlet_new((t_object *)x, &s_signal);
+    outlet_new((t_object *)x, &s_signal);
+    return (x);
+}
+
+void zerox_tilde_setup(void)
+{
+    zerox_class = class_new(gensym("zerox~"),
+			    (t_newmethod)zerox_new, 0,
+			    sizeof(t_zerox), 0, A_DEFFLOAT, 0);
+    sic_setup(zerox_class, zerox_dsp, SIC_FLOATTOSIGNAL);
+    class_addmethod(zerox_class, (t_method)zerox_set,
+		    gensym("set"), A_FLOAT, 0);  /* CHECKED arg obligatory */
+}