1 files changed, 103 insertions, 0 deletions
diff --git a/gr-wavelet/lib/wavelet_wavelet_ff_impl.cc b/gr-wavelet/lib/wavelet_wavelet_ff_impl.cc
new file mode 100644
index 000000000..719f4b53f
--- /dev/null
+++ b/gr-wavelet/lib/wavelet_wavelet_ff_impl.cc
@@ -0,0 +1,103 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008,2010,2012 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the tewavelet of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdexcept>
+#include <wavelet_wavelet_ff_impl.h>
+#include <gr_io_signature.h>
+
+#include <stdio.h>
+
+// NB in this version, only Daubechies wavelets
+// order is wavelet length, even, 2...20
+
+wavelet_wavelet_ff_sptr
+wavelet_make_wavelet_ff(int size,
+			int order,
+			bool forward)
+{
+  return gnuradio::get_initial_sptr(new wavelet_wavelet_ff_impl(size, order, forward));
+}
+
+wavelet_wavelet_ff_impl::wavelet_wavelet_ff_impl(int size, int order, bool forward)
+  : gr_sync_block("wavelet_ff",
+		  gr_make_io_signature(1, 1, size * sizeof(float)),
+		  gr_make_io_signature(1, 1, size * sizeof(float))),
+    d_size(size),
+    d_order(order),
+    d_forward(forward)
+{
+  d_wavelet = gsl_wavelet_alloc(gsl_wavelet_daubechies, d_order);
+  if (d_wavelet == NULL)
+    throw std::runtime_error("can't allocate wavelet");
+  d_workspace = gsl_wavelet_workspace_alloc(d_size);
+  if (d_workspace == NULL)
+    throw std::runtime_error("can't allocate wavelet workspace");
+  d_temp = (double *) malloc(d_size*sizeof(double));
+  if (d_workspace == NULL)
+    throw std::runtime_error("can't allocate wavelet double conversion temp");
+}
+
+wavelet_wavelet_ff_impl::~wavelet_wavelet_ff_impl()
+{
+  gsl_wavelet_free(d_wavelet);
+  gsl_wavelet_workspace_free(d_workspace);
+  free((char *) d_temp);
+}
+
+int
+wavelet_wavelet_ff_impl::work(int noutput_items,
+			      gr_vector_const_void_star &input_items,
+			      gr_vector_void_star &output_items)
+{
+  const float *in  = (const float *) input_items[0];
+  float       *out = (float *) output_items[0];
+
+  for (int count = 0; count < noutput_items; count++) {
+    for (int i = 0; i < d_size; i++)
+      d_temp[i] = in[i];
+    
+    if (d_forward)
+      gsl_wavelet_transform_forward(d_wavelet,
+				    d_temp,
+				    1,
+				    d_size,
+				    d_workspace);
+    else
+      gsl_wavelet_transform_inverse(d_wavelet,
+				    d_temp,
+				    1,
+				    d_size,
+				    d_workspace);
+    
+    for (int i = 0; i < d_size; i++)
+      out[i] = d_temp[i];
+
+    in  += d_size;
+    out += d_size;
+  }
+
+  return noutput_items;
+}