From 6a9bc88d7b52fc35b9fe3597cd29d9fbe90387ee Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Tue, 9 Feb 2010 21:40:51 +0000
Subject: updated to sigpack-0.04-win32.zip and committed forgotten debian
 files

svn path=/trunk/externals/sigpack/; revision=13154
---
 impulse~.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 impulse~.c

(limited to 'impulse~.c')

diff --git a/impulse~.c b/impulse~.c
new file mode 100644
index 0000000..96cc99a
--- /dev/null
+++ b/impulse~.c
@@ -0,0 +1,78 @@
+// sigpack
+// for
+// pure-data
+// by weiss
+// www.weiss-archiv.de
+
+#include "m_pd.h"
+#ifdef _MSC_VER
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+// ------------------------ impulse~ -----------------------------
+// non-bandlimited single-sample impulses
+// code from swh_plugins by steve harris www.plugin.org.uk
+
+static t_class *impulse_tilde_class;
+
+typedef struct _impulse_tilde
+{
+    t_object x_obj;
+	t_sample x_phase;
+	t_sample x_sample_rate;
+	float x_f;
+} t_impulse_tilde;
+
+static void *impulse_tilde_new(t_floatarg f)
+{
+	t_impulse_tilde *x = (t_impulse_tilde *)pd_new(impulse_tilde_class);
+	x->x_f = f;
+	x->x_phase = 0.f;
+	x->x_sample_rate = sys_getsr();//later put this in impulse_tilde_dsp???
+	outlet_new(&x->x_obj, gensym("signal"));
+	inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
+	return (x);
+}
+
+static t_int *impulse_tilde_perform(t_int *w)
+{
+	t_impulse_tilde *x = (t_impulse_tilde *)(w[1]);
+    t_float *in = (t_float *)(w[2]);
+    t_float *out = (t_float *)(w[3]);
+    int n = (int)(w[4]);
+	float f, phase_step, value;
+    while (n--)
+    {
+    	f = *(in++);
+		phase_step = f / x->x_sample_rate;
+		if (x->x_phase > 1.f) {
+			x->x_phase -= 1.f;
+			value = 1.f;
+		} else {
+			value = 0.f;
+		}
+	*out++ = value;
+	x->x_phase += phase_step;
+    }
+    return (w+5);
+}
+
+static void impulse_tilde_ft1(t_impulse_tilde *x, t_float f)
+{
+	x->x_phase = f;
+}
+
+static void impulse_tilde_dsp(t_impulse_tilde *x, t_signal **sp)
+{
+    dsp_add(impulse_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+void impulse_tilde_setup(void)
+{
+    impulse_tilde_class = class_new(gensym("impulse~"), (t_newmethod)impulse_tilde_new, 0,
+    	sizeof(t_impulse_tilde), 0, A_DEFFLOAT, 0);
+	CLASS_MAINSIGNALIN(impulse_tilde_class, t_impulse_tilde, x_f);
+    class_addmethod(impulse_tilde_class, (t_method)impulse_tilde_dsp, gensym("dsp"), 0);
+	class_addmethod(impulse_tilde_class, (t_method)impulse_tilde_ft1, gensym("ft1"), A_FLOAT, 0);
+}
-- 
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