From 9d56b9ba3b006e70f442001b54c66bcdb891a3b4 Mon Sep 17 00:00:00 2001
From: Johnathan Corgan <jcorgan@corganenterprises.com>
Date: Fri, 13 Apr 2012 23:04:06 -0700
Subject: wavelet: transition to namespace C++ API
---
gr-wavelet/lib/wavelet_ff_impl.cc | 110 ++++++++++++++++++++++++++++++++++++++
1 file changed, 110 insertions(+)
create mode 100644 gr-wavelet/lib/wavelet_ff_impl.cc
(limited to 'gr-wavelet/lib/wavelet_ff_impl.cc')
diff --git a/gr-wavelet/lib/wavelet_ff_impl.cc b/gr-wavelet/lib/wavelet_ff_impl.cc
new file mode 100644
index 0000000000..73fc8c5440
--- /dev/null
+++ b/gr-wavelet/lib/wavelet_ff_impl.cc
@@ -0,0 +1,110 @@
+/* -*- 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_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
+
+namespace gr {
+ namespace wavelet {
+
+ wavelet_ff::sptr wavelet_ff::make(int size,
+ int order,
+ bool forward)
+ {
+ return gnuradio::get_initial_sptr(new wavelet_ff_impl(size, order, forward));
+ }
+
+ wavelet_ff_impl::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_ff_impl::~wavelet_ff_impl()
+ {
+ gsl_wavelet_free(d_wavelet);
+ gsl_wavelet_workspace_free(d_workspace);
+ free((char *) d_temp);
+ }
+
+ int
+ 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;
+ }
+
+ } /* namespace wavelet */
+} /* namespace gr */
--
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