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diff --git a/lib/osmosdr_source_c_impl.cc b/lib/osmosdr_source_c_impl.cc
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+++ b/lib/osmosdr_source_c_impl.cc
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+/* -*- c++ -*- */
+/*
+ * Copyright 2012 Free Software Foundation, Inc.
+ * Copyright 2012 Dimitri Stolnikov <horiz0n@gmx.net>
+ *
+ * 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.
+ */
+
+/*
+ * config.h is generated by configure.  It contains the results
+ * of probing for features, options etc.  It should be the first
+ * file included in your .cc file.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <osmosdr_source_c_impl.h>
+#include <gr_io_signature.h>
+
+/*
+ * Create a new instance of osmosdr_source_c_impl and return
+ * a boost shared_ptr.  This is effectively the public constructor.
+ */
+osmosdr_source_c_sptr
+osmosdr_make_source_c (const std::string &args)
+{
+  return gnuradio::get_initial_sptr(new osmosdr_source_c_impl (args));
+}
+
+/*
+ * Specify constraints on number of input and output streams.
+ * This info is used to construct the input and output signatures
+ * (2nd & 3rd args to gr_block's constructor).  The input and
+ * output signatures are used by the runtime system to
+ * check that a valid number and type of inputs and outputs
+ * are connected to this block.  In this case, we accept
+ * only 1 input and 1 output.
+ */
+static const int MIN_IN = 0;	// mininum number of input streams
+static const int MAX_IN = 0;	// maximum number of input streams
+static const int MIN_OUT = 1;	// minimum number of output streams
+static const int MAX_OUT = 1;	// maximum number of output streams
+
+/*
+ * The private constructor
+ */
+osmosdr_source_c_impl::osmosdr_source_c_impl (const std::string &args)
+  : gr_hier_block2 ("osmosdr_source_c_impl",
+        gr_make_io_signature (MIN_IN, MAX_IN, sizeof (gr_complex)),
+        gr_make_io_signature (MIN_OUT, MAX_OUT, sizeof (gr_complex)))
+{
+  _src = make_rtl_source_c( args );
+
+  connect(_src, 0, self(), 0);
+}
+
+osmosdr::meta_range_t osmosdr_source_c_impl::get_samp_rates( void )
+{
+
+}
+
+double osmosdr_source_c_impl::set_samp_rate( double rate )
+{
+  return _src->set_sample_rate( rate );
+}
+
+double osmosdr_source_c_impl::get_samp_rate( void )
+{
+  return _src->get_sample_rate();
+}
+
+osmosdr::freq_range_t osmosdr_source_c_impl::get_freq_range( size_t chan )
+{
+
+}
+
+double osmosdr_source_c_impl::set_center_freq( double freq, size_t chan )
+{
+  return _src->set_center_freq( freq );
+}
+
+double osmosdr_source_c_impl::get_center_freq( size_t chan )
+{
+
+}
+
+double osmosdr_source_c_impl::set_freq_correction( double ppm, size_t chan )
+{
+
+}
+
+double osmosdr_source_c_impl::get_freq_correction( size_t chan )
+{
+
+}
+
+std::vector<std::string> osmosdr_source_c_impl::get_gain_names( size_t chan )
+{
+
+}
+
+osmosdr::gain_range_t osmosdr_source_c_impl::get_gain_range( const std::string & name, size_t chan )
+{
+
+}
+
+void osmosdr_source_c_impl::set_gain( double gain, size_t chan )
+{
+  _src->set_gain( gain );
+}
+
+void osmosdr_source_c_impl::set_gain( double gain, const std::string & name, size_t chan )
+{
+
+}
+
+double osmosdr_source_c_impl::get_gain( const std::string & name, size_t chan )
+{
+
+}