1 files changed, 61 insertions, 0 deletions
diff --git a/source/rectify~.c b/source/rectify~.c
new file mode 100644
index 0000000..d2dda88
--- /dev/null
+++ b/source/rectify~.c
@@ -0,0 +1,61 @@
+/* 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.rectify~ ----------------------------- */
+/* flips negative signal values to positive */
+
+static t_class *rectify_tilde_class;
+
+typedef struct _rectify_tilde
+{
+    t_object x_obj;
+	float x_f;
+} t_rectify_tilde;
+
+static void *rectify_tilde_new(void)
+{
+    t_rectify_tilde *x = (t_rectify_tilde *)pd_new(rectify_tilde_class);
+    outlet_new(&x->x_obj, gensym("signal"));
+	x->x_f = 0;
+    return (x);
+}
+
+static t_int *rectify_tilde_perform(t_int *w)
+{
+	t_rectify_tilde *x = (t_rectify_tilde *)(w[1]);
+    t_float *in = (t_float *)(w[2]);
+    t_float *out = (t_float *)(w[3]);
+    int n = (int)(w[4]);
+	float f, value;
+    while (n--)
+    {
+		f = *in++;
+		if (f < 0)
+			value = f * -1;
+		else
+			value = f;
+		*out++ = value;
+    }
+    return (w+5);
+}
+
+static void rectify_tilde_dsp(t_rectify_tilde *x, t_signal **sp)
+{
+    dsp_add(rectify_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+void rectify_tilde_setup(void)
+{
+    rectify_tilde_class = class_new(gensym("sp.rectify~"), (t_newmethod)rectify_tilde_new, 0,
+    	sizeof(t_rectify_tilde), 0, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(rectify_tilde_class, t_rectify_tilde, x_f);
+    class_addmethod(rectify_tilde_class, (t_method)rectify_tilde_dsp, gensym("dsp"), 0);
+}