From faada59567f8cb252f4a909116595ce309ff5828 Mon Sep 17 00:00:00 2001
From: "N.N." <krzyszcz@users.sourceforge.net>
Date: Fri, 23 May 2003 12:29:55 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r647, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/miXed/; revision=648
---
 cyclone/sickle/delay.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 cyclone/sickle/delay.c

(limited to 'cyclone/sickle/delay.c')

diff --git a/cyclone/sickle/delay.c b/cyclone/sickle/delay.c
new file mode 100644
index 0000000..b0ddd9d
--- /dev/null
+++ b/cyclone/sickle/delay.c
@@ -0,0 +1,101 @@
+/* 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 <string.h>
+#include "m_pd.h"
+#include "sickle/sic.h"
+
+typedef struct _delay
+{
+    t_sic     x_sic;
+    t_float  *x_buf;
+    t_float  *x_bufend;
+    t_float  *x_whead;
+    int	      x_maxsize;
+    int       x_delsize;
+} t_delay;
+
+static t_class *delay_class;
+
+#define DELAY_DEFMAXSIZE  512
+
+static void delay_ft1(t_delay *x, t_floatarg f)
+{
+    x->x_delsize = (f > 0 ? (int)f : 0);
+    if (x->x_delsize > x->x_maxsize)
+	x->x_delsize = x->x_maxsize;  /* CHECKED */
+    /* CHECKED: all buffered values should be available */
+}
+
+static t_int *delay_perform(t_int *w)
+{
+    t_delay *x = (t_delay *)(w[1]);
+    int nblock = (int)(w[2]);
+    t_float *in = (t_float *)(w[3]);
+    t_float *out = (t_float *)(w[4]);
+    t_float *buf = x->x_buf;
+    t_float *ep = x->x_bufend;
+    t_float *wp = x->x_whead;
+    if (x->x_delsize)
+    {
+	t_float *rp = wp - x->x_delsize;
+	if (rp < buf) rp += x->x_maxsize;
+	while (nblock--)
+	{
+	    float f = *in++;
+	    *out++ = *rp;
+	    if (rp++ == ep) rp = buf;
+	    *wp = f;
+	    if (wp++ == ep) wp = buf;
+	}
+    }
+    else while (nblock--)
+    {
+	*out++ = *wp = *in++;
+	if (wp++ == ep) wp = buf;
+    }
+    x->x_whead = wp;
+    return (w + 5);
+}
+
+static void delay_dsp(t_delay *x, t_signal **sp)
+{
+    memset(x->x_buf, 0, x->x_maxsize * sizeof(*x->x_buf));  /* CHECKED */
+    x->x_whead = x->x_buf;
+    dsp_add(delay_perform, 4, x, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
+}
+
+static void *delay_new(t_floatarg f1, t_floatarg f2)
+{
+    t_delay *x;
+    int maxsize = (f1 > 0 ? (int)f1 : DELAY_DEFMAXSIZE);
+    t_float *buf = (t_float *)getbytes(maxsize * sizeof(*buf));
+    if (!buf)
+	return (0);
+    x = (t_delay *)pd_new(delay_class);
+    x->x_maxsize = maxsize;
+    x->x_buf = x->x_whead = buf;
+    x->x_bufend = buf + maxsize - 1;
+    x->x_delsize = (f2 > 0 ? (int)f2 : 0);
+    if (x->x_delsize > maxsize)
+	x->x_delsize = maxsize;
+    inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
+    outlet_new((t_object *)x, &s_signal);
+    return (x);
+}
+
+static void delay_free(t_delay *x)
+{
+    if (x->x_buf) freebytes(x->x_buf, x->x_maxsize * sizeof(*x->x_buf));
+}
+
+void delay_tilde_setup(void)
+{
+    delay_class = class_new(gensym("delay~"),
+			    (t_newmethod)delay_new, (t_method)delay_free,
+			    sizeof(t_delay), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
+    sic_setup(delay_class, delay_dsp, SIC_FLOATTOSIGNAL);
+    class_addmethod(delay_class, (t_method)delay_ft1,
+		    gensym("ft1"), A_FLOAT, 0);
+}
-- 
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