--- /dev/null
+/* -*- c++ -*- */
+/*
+ * Copyright 2008 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.
+ */
+
+#ifndef INCLUDED_USRP2_SOURCE_BASE_H
+#define INCLUDED_USRP2_SOURCE_BASE_H
+
+#include <gr_sync_block.h>
+#include <usrp2/usrp2.h>
+#include <stdexcept>
+
+// BIG ASS FIXME: get from lower layer MTU calculation
+#define USRP2_MIN_RX_SAMPLES 371
+
+class usrp2_source_base : public gr_sync_block {
+
+protected:
+ usrp2_source_base(const char *name,
+ gr_io_signature_sptr output_signature,
+ const std::string &ifc,
+ const std::string &mac)
+ throw (std::runtime_error);
+
+ usrp2::usrp2::sptr d_u2;
+
+public:
+ ~usrp2_source_base();
+
+ /*!
+ * \brief Set receiver gain
+ */
+ bool set_gain(double gain);
+
+ /*!
+ * \brief Set receiver center frequency
+ */
+ bool set_center_freq(double frequency, usrp2::tune_result *tr);
+
+ /*!
+ * \brief Set receive decimation rate
+ */
+ bool set_decim(int decimation_factor);
+
+ /*!
+ * \brief Get USRP2 hardware MAC address
+ */
+ std::string mac_addr();
+
+ /*!
+ * \brief Called by scheduler when starting flowgraph
+ */
+ bool start();
+
+ /*!
+ * \brief Called by scheduler when stopping flowgraph
+ */
+ bool stop();
+
+ /*!
+ * \brief Derived class must override this
+ */
+ virtual int work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items) = 0;
+};
+
+#endif /* INCLUDED_USRP2_SOURCE_BASE_H */