1 files changed, 71 insertions, 0 deletions
diff --git a/fftw~.c b/fftw~.c
new file mode 100644
index 0000000..bde1a20
--- /dev/null
+++ b/fftw~.c
@@ -0,0 +1,71 @@
+/* Copyright (c) 1997-1999 Miller Puckette and others.
+ * For information on usage and redistribution, and for a DISCLAIMER OF ALL
+ * WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+#include "fftw~.h"
+
+#ifdef HAVE_LIBFFTW3F
+
+/* Support for fftw3 by Tim Blechmann                                       */
+
+/* ------------------------ fft~ -------------------------------- */
+static t_class *sigfftw_class;
+
+typedef struct fftw
+{
+  t_object x_obj;
+  float x_f;
+
+  fftwf_plan plan;
+  fftwf_iodim dim;
+} t_sigfftw;
+
+static void *sigfftw_new(void)
+{
+  t_sigfftw *x = (t_sigfftw *)pd_new(sigfftw_class);
+  outlet_new(&x->x_obj, gensym("signal"));
+  outlet_new(&x->x_obj, gensym("signal"));
+  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+  x->x_f = 0;
+  return (x);
+}
+
+static void sigfftw_free(t_sigfftw * x)
+{
+  fftwf_destroy_plan(x->plan);
+}
+
+static t_int *sigfftw_perform(t_int *w)
+{
+  fftwf_execute(*(fftwf_plan *)w[1]);
+
+  return (w+2);
+}
+
+static void sigfftw_dsp(t_sigfftw *x, t_signal **sp)
+{
+  int n = sp[0]->s_n;
+  float *in1 = sp[0]->s_vec;
+  float *in2 = sp[1]->s_vec;
+  float *out1 = sp[2]->s_vec;
+  float *out2 = sp[3]->s_vec;
+    
+  x->dim.n=n;
+  x->dim.is=1;
+  x->dim.os=1;
+  x->plan = fftwf_plan_guru_split_dft(1, &(x->dim), 0, NULL, 
+                                     in1, in2, out1, out2, 
+                                     FFTW_ESTIMATE);
+  dsp_add(sigfftw_perform, 1, &x->plan);
+}
+
+EXTERNAL_SETUP fftw_tilde_setup(void)
+{
+  sigfftw_class = class_new(gensym("fftw~"), sigfftw_new, 
+                            (t_method) sigfftw_free,
+                            sizeof(t_sigfftw), 0, 0);
+  CLASS_MAINSIGNALIN(sigfftw_class, t_sigfftw, x_f);
+  class_addmethod(sigfftw_class, (t_method)sigfftw_dsp, 
+                  gensym("dsp"), 0);
+}
+#endif