From f3e2e07201c50033bf6c9d0c6a6f068557b4f17f Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Wed, 17 Apr 2013 13:43:52 -0400
Subject: runtime: converting runtime core to gr namespace, gnuradio include
dir.
---
gnuradio-runtime/lib/sync_interpolator.cc | 73 +++++++++++++++++++++++++++++++
1 file changed, 73 insertions(+)
create mode 100644 gnuradio-runtime/lib/sync_interpolator.cc
(limited to 'gnuradio-runtime/lib/sync_interpolator.cc')
diff --git a/gnuradio-runtime/lib/sync_interpolator.cc b/gnuradio-runtime/lib/sync_interpolator.cc
new file mode 100644
index 0000000000..5721f24f0f
--- /dev/null
+++ b/gnuradio-runtime/lib/sync_interpolator.cc
@@ -0,0 +1,73 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2008,2013 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 terms 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 <gnuradio/sync_interpolator.h>
+
+namespace gr {
+
+ sync_interpolator::sync_interpolator(const std::string &name,
+ io_signature::sptr input_signature,
+ io_signature::sptr output_signature,
+ unsigned interpolation)
+ : sync_block(name, input_signature, output_signature)
+ {
+ set_interpolation(interpolation);
+ }
+
+ void
+ sync_interpolator::forecast(int noutput_items,
+ gr_vector_int &ninput_items_required)
+ {
+ unsigned ninputs = ninput_items_required.size();
+ for(unsigned i = 0; i < ninputs; i++)
+ ninput_items_required[i] = fixed_rate_noutput_to_ninput(noutput_items);
+ }
+
+ int
+ sync_interpolator::fixed_rate_noutput_to_ninput(int noutput_items)
+ {
+ return noutput_items / interpolation() + history() - 1;
+ }
+
+ int
+ sync_interpolator::fixed_rate_ninput_to_noutput(int ninput_items)
+ {
+ return std::max(0, ninput_items - (int)history() + 1) * interpolation();
+ }
+
+ int
+ sync_interpolator::general_work(int noutput_items,
+ gr_vector_int &ninput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items)
+ {
+ int r = work(noutput_items, input_items, output_items);
+ if(r > 0)
+ consume_each(r / interpolation());
+ return r;
+ }
+
+} /* namespace gr */
--
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