From f401bb9d53a662e2e78639d0d07f0d8e82e3bf7a Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Mon, 13 Dec 2010 02:53:10 +0000
Subject: refactored d_delay.c into delwrite~.h delwrite~.c delread~.c vd~.c

svn path=/trunk/; revision=14612
---
 externals/vanilla/vd~.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 externals/vanilla/vd~.c

(limited to 'externals/vanilla/vd~.c')

diff --git a/externals/vanilla/vd~.c b/externals/vanilla/vd~.c
new file mode 100644
index 00000000..3998c013
--- /dev/null
+++ b/externals/vanilla/vd~.c
@@ -0,0 +1,96 @@
+/* Copyright (c) 1997-1999 Miller Puckette.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+/*  send~, delread~, throw~, catch~ */
+
+#include "m_pd.h"
+#include "delwrite~.h"
+
+static t_class *sigvd_class;
+
+typedef struct _sigvd
+{
+    t_object x_obj;
+    t_symbol *x_sym;
+    t_float x_sr;       /* samples per msec */
+    int x_zerodel;      /* 0 or vecsize depending on read/write order */
+    t_float x_f;
+} t_sigvd;
+
+static void *sigvd_new(t_symbol *s)
+{
+    t_sigvd *x = (t_sigvd *)pd_new(sigvd_class);
+    if (!*s->s_name) s = gensym("vd~");
+    x->x_sym = s;
+    x->x_sr = 1;
+    x->x_zerodel = 0;
+    outlet_new(&x->x_obj, &s_signal);
+    x->x_f = 0;
+    return (x);
+}
+
+static t_int *sigvd_perform(t_int *w)
+{
+    t_sample *in = (t_sample *)(w[1]);
+    t_sample *out = (t_sample *)(w[2]);
+    t_delwritectl *ctl = (t_delwritectl *)(w[3]);
+    t_sigvd *x = (t_sigvd *)(w[4]);
+    int n = (int)(w[5]);
+
+    int nsamps = ctl->c_n;
+    t_sample limit = nsamps - n - 1;
+    t_sample fn = n-1;
+    t_sample *vp = ctl->c_vec, *bp, *wp = vp + ctl->c_phase;
+    t_sample zerodel = x->x_zerodel;
+    while (n--)
+    {
+        t_sample delsamps = x->x_sr * *in++ - zerodel, frac;
+        int idelsamps;
+        t_sample a, b, c, d, cminusb;
+        if (delsamps < 1.00001f) delsamps = 1.00001f;
+        if (delsamps > limit) delsamps = limit;
+        delsamps += fn;
+        fn = fn - 1.0f;
+        idelsamps = delsamps;
+        frac = delsamps - (t_sample)idelsamps;
+        bp = wp - idelsamps;
+        if (bp < vp + 4) bp += nsamps;
+        d = bp[-3];
+        c = bp[-2];
+        b = bp[-1];
+        a = bp[0];
+        cminusb = c-b;
+        *out++ = b + frac * (
+            cminusb - 0.1666667f * (1.-frac) * (
+                (d - a - 3.0f * cminusb) * frac + (d + 2.0f*a - 3.0f*b)
+            )
+        );
+    }
+    return (w+6);
+}
+
+static void sigvd_dsp(t_sigvd *x, t_signal **sp)
+{
+    t_sigdelwrite *delwriter =
+        (t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
+    x->x_sr = sp[0]->s_sr * 0.001;
+    if (delwriter)
+    {
+        sigdelwrite_checkvecsize(delwriter, sp[0]->s_n);
+        x->x_zerodel = (delwriter->x_sortno == ugen_getsortno() ?
+            0 : delwriter->x_vecsize);
+        dsp_add(sigvd_perform, 5,
+            sp[0]->s_vec, sp[1]->s_vec,
+                &delwriter->x_cspace, x, sp[0]->s_n);
+    }
+    else error("vd~: %s: no such delwrite~",x->x_sym->s_name);
+}
+
+void vd_tilde_setup(void)
+{
+    sigvd_class = class_new(gensym("vd~"), (t_newmethod)sigvd_new, 0,
+        sizeof(t_sigvd), 0, A_DEFSYM, 0);
+    class_addmethod(sigvd_class, (t_method)sigvd_dsp, gensym("dsp"), 0);
+    CLASS_MAINSIGNALIN(sigvd_class, t_sigvd, x_f);
+}
-- 
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