refactored d_delay.c into delwrite~.h delwrite~.c delread~.c vd~.c

svn path=/trunk/; revision=14612

1 files changed, 84 insertions, 0 deletions

diff --git a/externals/vanilla/delwrite~.c b/externals/vanilla/delwrite~.c
new file mode 100644
index 00000000..808c2f00
--- /dev/null
+++ b/externals/vanilla/delwrite~.c
@@ -0,0 +1,84 @@
+/* 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 void *sigdelwrite_new(t_symbol *s, t_floatarg msec)
+{
+    int nsamps;
+    t_sigdelwrite *x = (t_sigdelwrite *)pd_new(sigdelwrite_class);
+    if (!*s->s_name) s = gensym("delwrite~");
+    pd_bind(&x->x_obj.ob_pd, s);
+    x->x_sym = s;
+    nsamps = msec * sys_getsr() * (t_float)(0.001f);
+    if (nsamps < 1) nsamps = 1;
+    nsamps += ((- nsamps) & (SAMPBLK - 1));
+    nsamps += DEFDELVS;
+    x->x_cspace.c_n = nsamps;
+    x->x_cspace.c_vec =
+        (t_sample *)getbytes((nsamps + XTRASAMPS) * sizeof(t_sample));
+    x->x_cspace.c_phase = XTRASAMPS;
+    x->x_sortno = 0;
+    x->x_vecsize = 0;
+    x->x_f = 0;
+    return (x);
+}
+
+static t_int *sigdelwrite_perform(t_int *w)
+{
+    t_sample *in = (t_sample *)(w[1]);
+    t_delwritectl *c = (t_delwritectl *)(w[2]);
+    int n = (int)(w[3]);
+    int phase = c->c_phase, nsamps = c->c_n;
+    t_sample *vp = c->c_vec, *bp = vp + phase, *ep = vp + (c->c_n + XTRASAMPS);
+    phase += n;
+
+    while (n--)
+    {
+        t_sample f = *in++;
+        if (PD_BIGORSMALL(f))
+            f = 0;
+        *bp++ = f;
+        if (bp == ep)
+        {
+            vp[0] = ep[-4];
+            vp[1] = ep[-3];
+            vp[2] = ep[-2];
+            vp[3] = ep[-1];
+            bp = vp + XTRASAMPS;
+            phase -= nsamps;
+        }
+    }
+    bp = vp + c->c_phase;
+
+    c->c_phase = phase; 
+    return (w+4);
+}
+
+static void sigdelwrite_dsp(t_sigdelwrite *x, t_signal **sp)
+{
+    dsp_add(sigdelwrite_perform, 3, sp[0]->s_vec, &x->x_cspace, sp[0]->s_n);
+    x->x_sortno = ugen_getsortno();
+    sigdelwrite_checkvecsize(x, sp[0]->s_n);
+}
+
+static void sigdelwrite_free(t_sigdelwrite *x)
+{
+    pd_unbind(&x->x_obj.ob_pd, x->x_sym);
+    freebytes(x->x_cspace.c_vec,
+        (x->x_cspace.c_n + XTRASAMPS) * sizeof(t_sample));
+}
+
+void delwrite_tilde_setup(void)
+{
+    sigdelwrite_class = class_new(gensym("delwrite~"), 
+        (t_newmethod)sigdelwrite_new, (t_method)sigdelwrite_free,
+        sizeof(t_sigdelwrite), 0, A_DEFSYM, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(sigdelwrite_class, t_sigdelwrite, x_f);
+    class_addmethod(sigdelwrite_class, (t_method)sigdelwrite_dsp,
+        gensym("dsp"), 0);
+}