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-rw-r--r--cyclone/sickle/zerox.c78
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 */
+}