1 files changed, 70 insertions, 0 deletions
diff --git a/cyclone/sickle/sah.c b/cyclone/sickle/sah.c
new file mode 100644
index 0000000..afac1e0
--- /dev/null
+++ b/cyclone/sickle/sah.c
@@ -0,0 +1,70 @@
+/* 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 _sah
+{
+    t_sic    x_sic;
+    t_float  x_threshold;
+    t_float  x_lastin;
+    t_float  x_lastout;
+} t_sah;
+
+static t_class *sah_class;
+
+static t_int *sah_perform(t_int *w)
+{
+    t_sah *x = (t_sah *)(w[1]);
+    int nblock = (t_int)(w[2]);
+    t_float *in1 = (t_float *)(w[3]);
+    t_float *in2 = (t_float *)(w[4]);
+    t_float *out = (t_float *)(w[5]);
+    t_float threshold = x->x_threshold;
+    t_float lastin = x->x_lastin;
+    t_float lastout = x->x_lastout;
+    while (nblock--)
+    {
+    	float f = *in2++;
+	if (lastin <= threshold && f > threshold)  /* CHECKME <=, > */
+	    lastout = *in1;
+	in1++;
+	lastin = f;
+	*out++ = lastout;
+    }
+    x->x_lastin = lastin;
+    x->x_lastout = lastout;
+    return (w + 6);
+}
+
+static void sah_dsp(t_sah *x, t_signal **sp)
+{
+    dsp_add(sah_perform, 5, x, sp[0]->s_n,
+	    sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec);
+}
+
+static void sah_float(t_sah *x, t_float f)
+{
+    x->x_threshold = f;
+}
+
+static void *sah_new(t_floatarg f)
+{
+    t_sah *x = (t_sah *)pd_new(sah_class);
+    x->x_threshold = f;
+    x->x_lastin = 0;
+    x->x_lastout = 0;
+    inlet_new((t_object *)x, (t_pd *)x, &s_signal, &s_signal);
+    outlet_new((t_object *)x, &s_signal);
+    return (x);
+}
+
+void sah_tilde_setup(void)
+{
+    sah_class = class_new(gensym("sah~"),
+			  (t_newmethod)sah_new, 0,
+			  sizeof(t_sah), 0, A_DEFFLOAT, 0);
+    sic_setup(sah_class, sah_dsp, sah_float);
+}