From e35e02331589e993df65856ddacd5a99f936a99e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juha=20Vehvil=C3=A4inen?= <jusu@users.sourceforge.net>
Date: Sun, 6 Oct 2002 05:14:51 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r159, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/bsaylor/; revision=160
---
 zhzxh~.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 zhzxh~.c

(limited to 'zhzxh~.c')

diff --git a/zhzxh~.c b/zhzxh~.c
new file mode 100644
index 0000000..59a80d2
--- /dev/null
+++ b/zhzxh~.c
@@ -0,0 +1,83 @@
+/* Copyright 2002 Benjamin R. Saylor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "m_pd.h"
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+static t_class *zhzxh_class;
+
+typedef struct _zhzxh {
+	t_object x_obj;
+	t_float slope;
+	t_float lastval;
+	t_float srate;
+	t_float f;
+} t_zhzxh;
+
+static t_int *zhzxh_perform(t_int *w)
+{
+	t_zhzxh *x = (t_zhzxh *)(w[1]);
+	t_float *in = (t_float *)(w[2]);
+	t_float *out = (t_float *)(w[3]);
+	int n = (int)(w[4]);
+	t_float f;
+
+	t_float lastval = x->lastval;
+	t_float delta = x->slope / x->srate;
+	
+	while (n--) {
+		f = *(in++);
+		if (lastval < f)
+			*out = lastval + delta;
+		else
+			*out = lastval - delta;
+		lastval = *(out++);
+	}
+
+	x->lastval = lastval;
+
+	return (w+5);
+}
+
+static void zhzxh_dsp(t_zhzxh *x, t_signal **sp)
+{
+	dsp_add(zhzxh_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+static void *zhzxh_new(t_symbol *s, int argc, t_atom *argv)
+{
+	t_zhzxh *x = (t_zhzxh *)pd_new(zhzxh_class);
+	x->slope = 1;
+	x->lastval = 0;
+	x->srate = sys_getsr();
+	floatinlet_new(&x->x_obj, &x->slope);
+	outlet_new(&x->x_obj, gensym("signal"));
+
+	return (x);
+}
+
+void zhzxh_tilde_setup(void)
+{
+	zhzxh_class = class_new(gensym("zhzxh~"), (t_newmethod)zhzxh_new, 0, sizeof(t_zhzxh), 0, A_GIMME, 0);
+	class_sethelpsymbol(zhzxh_class, gensym("help-zhzxh~.pd"));
+	CLASS_MAINSIGNALIN(zhzxh_class, t_zhzxh, f);
+	class_addmethod(zhzxh_class, (t_method)zhzxh_dsp, gensym("dsp"), 0);
+}
-- 
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