1 files changed, 76 insertions, 0 deletions
diff --git a/cyclone/sickle/framedelta.c b/cyclone/sickle/framedelta.c
new file mode 100644
index 0000000..b898444
--- /dev/null
+++ b/cyclone/sickle/framedelta.c
@@ -0,0 +1,76 @@
+/* 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.  */
+
+#include <string.h>
+#include "m_pd.h"
+#include "common/grow.h"
+#include "sickle/sic.h"
+
+#define FRAMEDELTA_INISIZE  512
+
+typedef struct _framedelta
+{
+    t_sic     x_sic;
+    int       x_size;
+    t_float  *x_frame;
+    t_float   x_frameini[FRAMEDELTA_INISIZE];
+} t_framedelta;
+
+static t_class *framedelta_class;
+
+static t_int *framedelta_perform(t_int *w)
+{
+    int nblock = (int)(w[1]);
+    t_float *frame = (t_float *)(w[2]);
+    t_float *in = (t_float *)(w[3]);
+    t_float *out = (t_float *)(w[4]);
+    while (nblock--)
+    {
+	float f = *in++;
+	*out++ = f - *frame;  /* CHECKME */
+	*frame++ = f;
+    }
+    return (w + 5);
+}
+
+static void framedelta_dsp(t_framedelta *x, t_signal **sp)
+{
+    int nblock = sp[0]->s_n;
+    if (nblock > x->x_size)
+	x->x_frame = grow_nodata(&nblock, &x->x_size, x->x_frame,
+				 FRAMEDELTA_INISIZE, x->x_frameini,
+				 sizeof(*x->x_frame));
+    memset(x->x_frame, 0, nblock * sizeof(*x->x_frame));  /* CHECKME */
+    dsp_add(framedelta_perform, 4, nblock, x->x_frame,
+	    sp[0]->s_vec, sp[1]->s_vec);
+}
+
+static void framedelta_free(t_framedelta *x)
+{
+    if (x->x_frame != x->x_frameini)
+	freebytes(x->x_frame, x->x_size * sizeof(*x->x_frame));
+}
+
+static void *framedelta_new(t_symbol *s, int ac, t_atom *av)
+{
+    t_framedelta *x = (t_framedelta *)pd_new(framedelta_class);
+    int size;
+    x->x_size = FRAMEDELTA_INISIZE;
+    x->x_frame = x->x_frameini;
+    if ((size = sys_getblksize()) > FRAMEDELTA_INISIZE)
+	x->x_frame = grow_nodata(&size, &x->x_size, x->x_frame,
+				 FRAMEDELTA_INISIZE, x->x_frameini,
+				 sizeof(*x->x_frame));
+    outlet_new((t_object *)x, &s_signal);
+    return (x);
+}
+
+void framedelta_tilde_setup(void)
+{
+    framedelta_class = class_new(gensym("framedelta~"),
+				 (t_newmethod)framedelta_new,
+				 (t_method)framedelta_free,
+				 sizeof(t_framedelta), 0, 0);
+    sic_setup(framedelta_class, framedelta_dsp, SIC_FLOATTOSIGNAL);
+}