From b7857a8edb28bbc3a9839eec2cc7cb67695a51ba Mon Sep 17 00:00:00 2001
From: Martin Peach <mrpeach@users.sourceforge.net>
Date: Wed, 11 Jul 2007 19:44:32 +0000
Subject: pipelist is like pipe for lists. It can be used with unpackOSC to
 delay timetagged messages.

svn path=/trunk/externals/mrpeach/; revision=8021
---
 osc/pipelist.c | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 osc/pipelist.c

(limited to 'osc/pipelist.c')

diff --git a/osc/pipelist.c b/osc/pipelist.c
new file mode 100644
index 0000000..14e9e7b
--- /dev/null
+++ b/osc/pipelist.c
@@ -0,0 +1,127 @@
+/* pipelist.c 20070711 Martin Peach based on pipe from x_time.c */
+#include "m_pd.h" 
+/* -------------------------- pipe -------------------------- */
+
+static t_class *pipelist_class;
+
+typedef struct _hang
+{
+    t_clock             *h_clock;
+    struct _hang        *h_next;
+    struct _pipelist    *h_owner;
+    int                 h_n; /* number of atoms in h_list */
+    t_atom              *h_atoms; /* pointer to a list of h_n t_atoms */
+} t_hang;
+
+typedef struct _pipelist
+{
+    t_object    x_obj;
+    float       x_deltime;
+    t_outlet    *x_pipelistout;
+    t_hang      *x_hang;
+} t_pipelist;
+
+static void *pipelist_new(t_symbol *s, int argc, t_atom *argv);
+static void pipelist_hang_free(t_hang *h);
+static void pipelist_hang_tick(t_hang *h);
+static void pipelist_list(t_pipelist *x, t_symbol *s, int ac, t_atom *av);
+static void pipelist_flush(t_pipelist *x);
+static void pipelist_clear(t_pipelist *x);
+void pipelist_setup(void);
+
+static void *pipelist_new(t_symbol *s, int argc, t_atom *argv)
+{
+    t_pipelist  *x = (t_pipelist *)pd_new(pipelist_class);
+    float       deltime;
+
+    if (argc)
+    { /* We accept one argument to set the delay time, ignore any further args */
+        if (argv[0].a_type != A_FLOAT)
+        {
+            char stupid[80];
+            atom_string(&argv[argc-1], stupid, 79);
+            post("pipelist: %s: bad time delay value", stupid);
+            deltime = 0;
+        }
+        else deltime = argv[argc-1].a_w.w_float;
+    }
+    else deltime = 0;
+
+    x->x_pipelistout = outlet_new(&x->x_obj, &s_list);
+    floatinlet_new(&x->x_obj, &x->x_deltime);
+    x->x_hang = NULL;
+    x->x_deltime = deltime;
+    return (x);
+}
+
+static void pipelist_hang_free(t_hang *h)
+{
+    freebytes(h->h_atoms, h->h_n*sizeof(t_atom));
+    clock_free(h->h_clock);
+    freebytes(h, sizeof(t_hang));
+}
+
+static void pipelist_hang_tick(t_hang *h)
+{
+    t_pipelist  *x = h->h_owner;
+    t_hang      *h2, *h3;
+
+    /* excise h from the linked list of hangs */
+    if (x->x_hang == h) x->x_hang = h->h_next;
+    else for (h2 = x->x_hang; ((h3 = h2->h_next)!=NULL); h2 = h3)
+    {
+        if (h3 == h)
+        {
+            h2->h_next = h3->h_next;
+            break;
+        }
+    }
+    /* output h's list */
+    outlet_list(x->x_pipelistout, &s_list, h->h_n, h->h_atoms);
+    /* free h */
+    pipelist_hang_free(h);
+}
+
+static void pipelist_list(t_pipelist *x, t_symbol *s, int ac, t_atom *av)
+{
+    t_hang *h = (t_hang *)getbytes(sizeof(t_hang));
+    int i;
+
+    h->h_n = ac;
+    h->h_atoms = (t_atom *)getbytes(h->h_n*sizeof(t_atom));
+
+    for (i = 0; i < h->h_n; ++i)
+        h->h_atoms[i] = av[i];
+    h->h_next = x->x_hang;
+    x->x_hang = h;
+    h->h_owner = x;
+    h->h_clock = clock_new(h, (t_method)pipelist_hang_tick);
+    clock_delay(h->h_clock, (x->x_deltime >= 0 ? x->x_deltime : 0));
+}
+
+static void pipelist_flush(t_pipelist *x)
+{
+    while (x->x_hang) pipelist_hang_tick(x->x_hang);
+}
+
+static void pipelist_clear(t_pipelist *x)
+{
+    t_hang *hang;
+    while ((hang = x->x_hang) != NULL)
+    {
+        x->x_hang = hang->h_next;
+        pipelist_hang_free(hang);
+    }
+}
+
+void pipelist_setup(void)
+{
+    pipelist_class = class_new(gensym("pipelist"), 
+        (t_newmethod)pipelist_new, (t_method)pipelist_clear,
+        sizeof(t_pipelist), 0, A_GIMME, 0);
+    class_addlist(pipelist_class, pipelist_list);
+    class_addmethod(pipelist_class, (t_method)pipelist_flush, gensym("flush"), 0);
+    class_addmethod(pipelist_class, (t_method)pipelist_clear, gensym("clear"), 0);
+}
+
+/* end of pipelist.c*/
-- 
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