From 4d84d14ac1aa13958eaa2971b03f7f929a519105 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?=
 <zmoelnig@users.sourceforge.net>
Date: Fri, 8 Feb 2008 13:00:32 +0000
Subject: reorganized

svn path=/trunk/; revision=9400
---
 desiredata/extra/loop~/loop~.c | 164 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 164 insertions(+)
 create mode 100644 desiredata/extra/loop~/loop~.c

(limited to 'desiredata/extra/loop~/loop~.c')

diff --git a/desiredata/extra/loop~/loop~.c b/desiredata/extra/loop~/loop~.c
new file mode 100644
index 00000000..2f440030
--- /dev/null
+++ b/desiredata/extra/loop~/loop~.c
@@ -0,0 +1,164 @@
+/* loop~ -- loop generator for sampling */
+
+/*  Copyright 1997-1999 Miller Puckette.
+Permission is granted to use this software for any purpose provided you
+keep this copyright notice intact.
+
+THE AUTHOR AND HIS EMPLOYERS MAKE NO WARRANTY, EXPRESS OR IMPLIED,
+IN CONNECTION WITH THIS SOFTWARE.
+
+This file is downloadable from http://www.crca.ucsd.edu/~msp .
+
+*/
+
+#ifdef PD
+#include "m_pd.h"
+#endif
+
+typedef struct _loopctl
+{
+    double l_phase;
+    float l_invwindow;
+    float l_window;
+    int l_resync;
+} t_loopctl;
+
+static void loopctl_run(t_loopctl *x, float *transposein,
+        float *windowin, float *rawout, float *windowout, int n)
+{
+    float window, invwindow;
+    double phase = x->l_phase;
+    if (x->l_resync)
+    {
+        window = *windowin;
+        if (window < 0)
+        {
+            if (window > -1)
+                window = -1;
+            invwindow = -1/window;
+        }
+        else
+        {
+            if (window < 1)
+                window = 1;
+            invwindow = 1/window;
+        }
+        x->l_resync = 0;
+    }
+    else
+    {
+        window = x->l_window;
+        phase = x->l_phase;
+        invwindow = x->l_invwindow;
+    }
+    while (n--)
+    {
+        double phaseinc = invwindow * *transposein++;
+        double newphase;
+        float nwind = *windowin++;
+        if (phaseinc >= 1 || phaseinc < 0)
+            phaseinc = 0;
+        newphase = phase + phaseinc;
+        if (newphase >= 1)
+        {
+            window = nwind;
+            if (window < 0)
+            {
+                if (window > -1)
+                    window = -1;
+                invwindow = -1/window;
+            }
+            else
+            {
+                if (window < 1)
+                    window = 1;
+                invwindow = 1/window;
+            }
+            newphase -= 1.;
+        }
+        phase = newphase;
+        *rawout++ = (float)phase;
+        *windowout++ = window;
+    }
+    x->l_invwindow = invwindow;
+    x->l_window = window;
+    x->l_phase = phase;
+}
+
+static void loopctl_init(t_loopctl *x)
+{
+    x->l_window = 1;
+    x->l_invwindow = 1;
+    x->l_phase = 0;
+}
+
+static void loopctl_set(t_loopctl *x, float val)
+{
+    if (val < 0 || val > 1)
+        val = 0;
+    x->l_phase = val;
+    x->l_resync = 1;
+}
+
+#ifdef PD
+
+typedef struct _loop
+{
+    t_object x_obj;
+    t_float x_f;
+    t_loopctl x_loopctl;
+} t_loop;
+
+static t_class *loop_class;
+
+static void *loop_new(void)
+{
+    t_loop *x = (t_loop *)pd_new(loop_class);
+    loopctl_init(&x->x_loopctl);
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+    outlet_new(&x->x_obj, gensym("signal"));
+    outlet_new(&x->x_obj, gensym("signal"));
+    return (x);
+}
+
+static t_int *loop_perform(t_int *w)
+{
+    t_loopctl *ctl = (t_loopctl *)(w[1]);
+    t_float *in1 = (t_float *)(w[2]);
+    t_float *in2 = (t_float *)(w[3]);
+    t_float *out1 = (t_float *)(w[4]);
+    t_float *out2 = (t_float *)(w[5]);
+    int n = (int)(w[6]);
+    loopctl_run(ctl, in1, in2, out1, out2, n);
+    return (w+7);
+}
+
+static void loop_dsp(t_loop *x, t_signal **sp)
+{
+    dsp_add(loop_perform, 6,
+        &x->x_loopctl, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec,
+            sp[0]->s_n);
+}
+
+static void loop_set(t_loop *x, t_floatarg val)
+{
+    loopctl_set(&x->x_loopctl, val);
+}
+
+static void loop_bang(t_loop *x)
+{
+    loopctl_set(&x->x_loopctl, 0);
+}
+
+void loop_tilde_setup(void)
+{
+    loop_class = class_new(gensym("loop~"), (t_newmethod)loop_new, 0,
+        sizeof(t_loop), 0, 0);
+    class_addmethod(loop_class, (t_method)loop_dsp, gensym("dsp"), A_CANT, 0);
+    CLASS_MAINSIGNALIN(loop_class, t_loop, x_f);
+    class_addmethod(loop_class, (t_method)loop_set, gensym("set"),
+        A_DEFFLOAT, 0);
+    class_addbang(loop_class, loop_bang);
+}
+
+#endif /* PD */
-- 
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