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/lookup.c | 94 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 cyclone/sickle/lookup.c

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

diff --git a/cyclone/sickle/lookup.c b/cyclone/sickle/lookup.c
new file mode 100644
index 0000000..1c6a8af
--- /dev/null
+++ b/cyclone/sickle/lookup.c
@@ -0,0 +1,94 @@
+/* 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.  */
+
+/* LATER reconsider making float/int conversions
+   more compatible (and less useful). */
+
+#include "m_pd.h"
+#include "sickle/sic.h"
+#include "sickle/arsic.h"
+
+typedef t_arsic t_lookup;
+static t_class *lookup_class;
+
+#define LOOKUP_DEFSIZE  512
+
+static void lookup_set(t_lookup *x, t_symbol *s)
+{
+    arsic_setarray((t_arsic *)x, s, 1);
+}
+
+static t_int *lookup_perform(t_int *w)
+{
+    t_arsic *sic = (t_arsic *)(w[1]);
+    int nblock = (int)(w[2]);
+    t_float *out = (t_float *)(w[6]);
+    if (sic->s_playable)
+    {	
+	t_float *xin = (t_float *)(w[3]);
+	t_float *oin = (t_float *)(w[4]);
+	t_float *sin = (t_float *)(w[5]);
+	int vecsize = sic->s_vecsize;
+	t_float *vec = sic->s_vectors[0];  /* playable implies nonzero (mono) */
+	while (nblock--)
+	{
+	    float off = *oin++;  /* msp: converted to int (if not a signal) */
+	    int siz = (int)*sin++ - 1;  /* msp: converted to int (signal too) */
+	    float pos = (siz > 0 ? off + siz * (*xin++ + 1.0) * 0.5 : off);
+	    int ndx = (int)pos;
+	    int ndx1 = ndx + 1;
+	    if (ndx1 > 0 && ndx1 < vecsize)
+	    {
+		float val = vec[ndx];
+		*out++ = val + (vec[ndx1] - val) * (pos - ndx);
+	    }
+	    /* CHECKED: */
+	    else if (ndx1 == 0) *out++ = *vec * (pos + 1.0);
+	    else if (ndx1 == vecsize) *out++ = vec[ndx] * (ndx1 - pos);
+	    else *out++ = 0;
+	}
+    }
+    else while (nblock--) *out++ = 0;
+    return (w + 7);
+}
+
+static void lookup_dsp(t_lookup *x, t_signal **sp)
+{
+    arsic_dsp((t_arsic *)x, sp, lookup_perform, 1);
+}
+
+static void lookup_free(t_lookup *x)
+{
+    arsic_free((t_arsic *)x);
+}
+
+static void *lookup_new(t_symbol *s, t_floatarg f1, t_floatarg f2)
+{
+    /* CHECKED: lookup~ always uses the first channel in a multi-channel buffer~
+       (as the refman says). */
+    /* three auxiliary signals: amplitude, offset and size inputs */
+    t_lookup *x = (t_lookup *)arsic_new(lookup_class, s, 0, 0, 3);
+    if (x)
+    {
+	arsic_setminsize((t_arsic *)x, 2);
+	if (f1 < 0) f1 = 0;
+	if (f2 <= 0) f2 = LOOKUP_DEFSIZE;
+	sic_newinlet((t_sic *)x, f1);
+	sic_newinlet((t_sic *)x, f2);
+	outlet_new((t_object *)x, &s_signal);
+    }
+    return (x);
+}
+
+void lookup_tilde_setup(void)
+{
+    lookup_class = class_new(gensym("lookup~"),
+			     (t_newmethod)lookup_new,
+			     (t_method)lookup_free,
+			     sizeof(t_lookup), 0,
+			     A_DEFSYM, A_DEFFLOAT, A_DEFFLOAT, 0);
+    arsic_setup(lookup_class, lookup_dsp, SIC_FLOATTOSIGNAL);
+    class_addmethod(lookup_class, (t_method)lookup_set,
+		    gensym("set"), A_SYMBOL, 0);
+}
-- 
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