Added SDRplay RSP support

Initial build for SDRplay RSP support. Basic functionality, AGC etc. to
be added

11 files changed, 824 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 234b297..1a288aa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -157,6 +157,7 @@ find_package(GnuradioFCDPP)
 find_package(LibOsmoSDR)
 find_package(LibRTLSDR)
 find_package(LibMiriSDR)
+find_package(LibSDRplay)
 find_package(LibHackRF)
 find_package(LibAIRSPY)
 find_package(LibbladeRF)
diff --git a/README b/README
index d4efdf5..8c50cef 100644
--- a/README
+++ b/README
@@ -14,6 +14,7 @@ as well supports:
  * Nuand LLC bladeRF through libbladeRF library
  * Ettus USRP Devices through Ettus UHD library
  * Fairwaves UmTRX through Fairwaves' fork of UHD
+ * SDRplay RSP through SDRplay API library
 
 By using the OsmoSDR block you can take advantage of a common software api in
 your application(s) independent of the underlying radio hardware.
diff --git a/cmake/Modules/FindLibSDRplay.cmake b/cmake/Modules/FindLibSDRplay.cmake
new file mode 100644
index 0000000..aed3657
--- /dev/null
+++ b/cmake/Modules/FindLibSDRplay.cmake
@@ -0,0 +1,27 @@
+if(NOT LIBSDRPLAY_FOUND)
+  pkg_check_modules (LIBSDRPLAY_PKG libsdrplay)
+  find_path(LIBSDRPLAY_INCLUDE_DIRS NAMES mirsdrapi-rsp.h
+    PATHS
+    ${LIBSDRPLAY_PKG_INCLUDE_DIRS}
+    /usr/include
+    /usr/local/include
+  )
+
+  find_library(LIBSDRPLAY_LIBRARIES NAMES mirsdrapi-rsp
+    PATHS
+    ${LIBSDRPLAY_PKG_LIBRARY_DIRS}
+    /usr/lib
+    /usr/local/lib
+  )
+
+if(LIBSDRPLAY_INCLUDE_DIRS AND LIBSDRPLAY_LIBRARIES)
+  set(LIBSDRPLAY_FOUND TRUE CACHE INTERNAL "libsdrplay found")
+  message(STATUS "Found libsdrplay: ${LIBSDRPLAY_INCLUDE_DIRS}, ${LIBSDRPLAY_LIBRARIES}")
+else(LIBSDRPLAY_INCLUDE_DIRS AND LIBSDRPLAY_LIBRARIES)
+  set(LIBSDRPLAY_FOUND FALSE CACHE INTERNAL "libsdrplay found")
+  message(STATUS "libsdrplay not found.")
+endif(LIBSDRPLAY_INCLUDE_DIRS AND LIBSDRPLAY_LIBRARIES)
+
+mark_as_advanced(LIBSDRPLAY_LIBRARIES LIBSDRPLAY_INCLUDE_DIRS)
+
+endif(NOT LIBSDRPLAY_FOUND)
diff --git a/grc/gen_osmosdr_blocks.py b/grc/gen_osmosdr_blocks.py
index c002508..ecf7dcc 100644
--- a/grc/gen_osmosdr_blocks.py
+++ b/grc/gen_osmosdr_blocks.py
@@ -214,6 +214,7 @@ While primarily being developed for the OsmoSDR hardware, this block as well sup
  * RTL2832U based DVB-T dongles through librtlsdr
  * RTL-TCP spectrum server (see librtlsdr project)
  * MSi2500 based DVB-T dongles through libmirisdr
+ * SDRplay RSP devices through SDRplay library
  * gnuradio .cfile input through libgnuradio-blocks
  * RFSPACE SDR-IQ, SDR-IP, NetSDR (incl. X2 option)
  * AirSpy Wideband Receiver through libairspy
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index e22f850..003686d 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -183,6 +183,14 @@ GR_INCLUDE_SUBDIRECTORY(miri)
 endif(ENABLE_MIRI)
 
 ########################################################################
+# Setup SDRplay component
+########################################################################
+GR_REGISTER_COMPONENT("SDRplay RSP" ENABLE_SDRPLAY LIBSDRPLAY_FOUND)
+if(ENABLE_SDRPLAY)
+GR_INCLUDE_SUBDIRECTORY(sdrplay)
+endif(ENABLE_SDRPLAY)
+
+########################################################################
 # Setup HackRF component
 ########################################################################
 GR_REGISTER_COMPONENT("HackRF Jawbreaker" ENABLE_HACKRF LIBHACKRF_FOUND)
diff --git a/lib/config.h.in b/lib/config.h.in
index f7d960d..66c3e1b 100644
--- a/lib/config.h.in
+++ b/lib/config.h.in
@@ -11,6 +11,7 @@
 #cmakedefine ENABLE_RTL_TCP
 #cmakedefine ENABLE_UHD
 #cmakedefine ENABLE_MIRI
+#cmakedefine ENABLE_SDRPLAY
 #cmakedefine ENABLE_HACKRF
 #cmakedefine ENABLE_BLADERF
 #cmakedefine ENABLE_RFSPACE
diff --git a/lib/device.cc b/lib/device.cc
index e27daf6..d8fcfba 100644
--- a/lib/device.cc
+++ b/lib/device.cc
@@ -58,6 +58,10 @@
 #include <miri_source_c.h>
 #endif
 
+#ifdef ENABLE_SDRPLAY
+#include <sdrplay_source_c.h>
+#endif
+
 #ifdef ENABLE_HACKRF
 #include <hackrf_source_c.h>
 #endif
@@ -150,6 +154,10 @@ devices_t device::find(const device_t &hint)
   BOOST_FOREACH( std::string dev, miri_source_c::get_devices() )
     devices.push_back( device_t(dev) );
 #endif
+#ifdef ENABLE_SDRPLAY
+  BOOST_FOREACH( std::string dev, sdrplay_source_c::get_devices() )
+    devices.push_back( device_t(dev) );
+#endif
 #ifdef ENABLE_BLADERF
   BOOST_FOREACH( std::string dev, bladerf_source_c::get_devices() )
     devices.push_back( device_t(dev) );
diff --git a/lib/sdrplay/CMakeLists.txt b/lib/sdrplay/CMakeLists.txt
new file mode 100644
index 0000000..382ab33
--- /dev/null
+++ b/lib/sdrplay/CMakeLists.txt
@@ -0,0 +1,37 @@
+# Copyright 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 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.
+
+########################################################################
+# This file included, use CMake directory variables
+########################################################################
+
+include_directories(
+    ${CMAKE_CURRENT_SOURCE_DIR}
+    ${LIBSDRPLAY_INCLUDE_DIRS}
+)
+
+set(sdrplay_srcs
+    ${CMAKE_CURRENT_SOURCE_DIR}/sdrplay_source_c.cc
+)
+
+########################################################################
+# Append gnuradio-sdrplay library sources
+########################################################################
+list(APPEND gr_osmosdr_srcs ${sdrplay_srcs})
+list(APPEND gr_osmosdr_libs ${LIBSDRPLAY_LIBRARIES})
diff --git a/lib/sdrplay/sdrplay_source_c.cc b/lib/sdrplay/sdrplay_source_c.cc
new file mode 100644
index 0000000..ac3e1f0
--- /dev/null
+++ b/lib/sdrplay/sdrplay_source_c.cc
@@ -0,0 +1,587 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2012 Dimitri Stolnikov <horiz0n@gmx.net>
+ * Copyright 2012 Steve Markgraf <steve@steve-m.de>
+ *
+ * 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 "sdrplay_source_c.h"
+#include <gnuradio/io_signature.h>
+#include "osmosdr/source.h"
+
+#include <boost/assign.hpp>
+#include <boost/format.hpp>
+
+#include <stdexcept>
+#include <iostream>
+#include <stdio.h>
+#include <math.h>
+
+#include <mirsdrapi-rsp.h>
+
+#include "arg_helpers.h"
+
+#define MAX_SUPPORTED_DEVICES   4
+
+struct sdrplay_dev
+{
+   int gRdB;
+   double gain_dB;
+   double fsHz;
+   double rfHz;
+   mir_sdr_Bw_MHzT bwType;
+   mir_sdr_If_kHzT ifType;
+   int samplesPerPacket;
+   int maxGain;
+   int minGain;
+   int dcMode;
+};
+
+using namespace boost::assign;
+
+#define BYTES_PER_SAMPLE  4 // sdrplay device delivers 16 bit signed IQ data
+                            // containing 12 bits of information
+
+#define SDRPLAY_AM_MIN     150e3
+#define SDRPLAY_AM_MAX      30e6
+#define SDRPLAY_FM_MIN      64e6
+#define SDRPLAY_FM_MAX     108e6
+#define SDRPLAY_B3_MIN     162e6
+#define SDRPLAY_B3_MAX     240e6
+#define SDRPLAY_B45_MIN    470e6
+#define SDRPLAY_B45_MAX    960e6
+#define SDRPLAY_L_MIN     1450e6
+#define SDRPLAY_L_MAX     1675e6
+
+/*
+ * Create a new instance of sdrplay_source_c and return
+ * a boost shared_ptr.  This is effectively the public constructor.
+ */
+sdrplay_source_c_sptr
+make_sdrplay_source_c (const std::string &args)
+{
+  return gnuradio::get_initial_sptr(new sdrplay_source_c (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 0 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
+ */
+sdrplay_source_c::sdrplay_source_c (const std::string &args)
+  : gr::sync_block ("sdrplay_source_c",
+        gr::io_signature::make(MIN_IN, MAX_IN, sizeof (gr_complex)),
+        gr::io_signature::make(MIN_OUT, MAX_OUT, sizeof (gr_complex))),
+    _running(false),
+    _uninit(false),
+    _auto_gain(false)
+{
+   _dev = (sdrplay_dev_t *)malloc(sizeof(sdrplay_dev_t));
+   if (_dev == NULL)
+   {
+      return;
+}
+   _dev->fsHz = 2048e3;
+   _dev->rfHz = 200e6;
+   _dev->bwType = mir_sdr_BW_1_536;
+   _dev->ifType = mir_sdr_IF_Zero;
+   _dev->samplesPerPacket = 0;
+   _dev->dcMode = 0;
+   _dev->gRdB = 60;
+   set_gain_limits(_dev->rfHz);
+   _dev->gain_dB = _dev->maxGain - _dev->gRdB;
+
+   _buf_mutex.lock();
+   _buf_offset = 0;
+//   _buf_remaining = 0;
+   _buf_mutex.unlock();
+}
+
+/*
+ * Our virtual destructor.
+ */
+sdrplay_source_c::~sdrplay_source_c ()
+{
+   if (_dev != NULL)
+   {
+      free(_dev);
+      _dev = NULL;
+   }
+   _buf_mutex.lock();
+   if (_running)
+   {
+      _running = false;
+   }
+   _uninit = true;
+   _buf_mutex.unlock();
+}
+
+void sdrplay_source_c::reinit_device()
+{
+   std::cerr << "reinit_device started" << std::endl;
+   _buf_mutex.lock();
+   std::cerr << "after mutex.lock" << std::endl;
+   if (_running)
+   {
+      std::cerr << "mir_sdr_Uninit started" << std::endl;
+      mir_sdr_Uninit();
+   }
+
+   std::cerr << "mir_sdr_Init started" << std::endl;
+   mir_sdr_Init(_dev->gRdB, _dev->fsHz / 1e6, _dev->rfHz / 1e6, _dev->bwType, _dev->ifType, &_dev->samplesPerPacket);
+
+   if (_dev->dcMode)
+   {
+      std::cerr << "mir_sdr_SetDcMode started" << std::endl;
+      mir_sdr_SetDcMode(4, 1);
+   }
+
+   _buf_offset = 0;
+   _buf_mutex.unlock();
+   std::cerr << "reinit_device end" << std::endl;
+}
+
+void sdrplay_source_c::set_gain_limits(double freq)
+{
+   if (freq <= SDRPLAY_AM_MAX)
+   {
+      _dev->minGain = -4;
+      _dev->maxGain = 98;
+   }
+   else if (freq <= SDRPLAY_FM_MAX)
+   {
+      _dev->minGain = 1;
+      _dev->maxGain = 103;
+   }
+   else if (freq <= SDRPLAY_B3_MAX)
+   {
+      _dev->minGain = 5;
+      _dev->maxGain = 107;
+   }
+   else if (freq <= SDRPLAY_B45_MAX)
+   {
+      _dev->minGain = 9;
+      _dev->maxGain = 94;
+   }
+   else if (freq <= SDRPLAY_L_MAX)
+   {
+      _dev->minGain = 24;
+      _dev->maxGain = 105;
+   }
+}
+
+int sdrplay_source_c::work( int noutput_items,
+                            gr_vector_const_void_star &input_items,
+                            gr_vector_void_star &output_items )
+{
+   gr_complex *out = (gr_complex *)output_items[0];
+   int cnt = noutput_items;
+   unsigned int sampNum;
+   int grChanged;
+   int rfChanged;
+   int fsChanged;
+
+   if (_uninit)
+   {
+      return WORK_DONE;
+   }
+
+   if (!_running)
+   {
+      reinit_device();
+      _running = true;
+   }
+
+   _buf_mutex.lock();
+
+   if (_buf_offset)
+   {
+      for (int i = _buf_offset; i < _dev->samplesPerPacket; i++)
+      {
+         *out++ = gr_complex( float(_bufi[i]) * (1.0f/4096.0f), float(_bufq[i]) * (1.0f/4096.0f) );
+      }
+      cnt -= (_dev->samplesPerPacket - _buf_offset);
+   }
+
+   while ((cnt - _dev->samplesPerPacket) >= 0)
+   {
+      mir_sdr_ReadPacket(&_bufi[0], &_bufq[0], &sampNum, &grChanged, &rfChanged, &fsChanged);
+      for (int i = 0; i < _dev->samplesPerPacket; i++)
+      {
+         *out++ = gr_complex( float(_bufi[i]) * (1.0f/32768.0f), float(_bufq[i]) * (1.0f/32768.0f) );
+      }
+      cnt -= _dev->samplesPerPacket;
+   }
+
+   _buf_offset = 0;
+   if (cnt)
+   {
+      mir_sdr_ReadPacket(&_bufi[0], &_bufq[0], &sampNum, &grChanged, &rfChanged, &fsChanged);
+      for (int i = 0; i < cnt; i++)
+      {
+         *out++ = gr_complex( float(_bufi[i]) * (1.0f/4096.0f), float(_bufq[i]) * (1.0f/4096.0f) );
+      }
+      _buf_offset = cnt;
+   }
+   _buf_mutex.unlock();
+
+   return noutput_items;
+}
+
+std::vector<std::string> sdrplay_source_c::get_devices()
+{
+   std::vector<std::string> devices;
+   std::cerr << "get_devices started" << std::endl;
+
+   unsigned int dev_cnt = 0;
+   int samplesPerPacket;
+   while(mir_sdr_Init(60, 2.048, 200.0, mir_sdr_BW_1_536, mir_sdr_IF_Zero, &samplesPerPacket) == mir_sdr_Success)
+   {
+      dev_cnt++;
+   }
+
+   std::cerr << "Device count: " << dev_cnt << std::endl;
+
+   for (unsigned int i = 0; i < dev_cnt; i++) 
+   {
+      mir_sdr_Uninit();
+      std::string args = "sdrplay=" + boost::lexical_cast< std::string >( i );
+      args += ",label='" + std::string("SDRplay RSP") + "'";
+      std::cerr << args << std::endl;
+      devices.push_back( args );
+   }
+
+   std::cerr << "get_devices end" << std::endl;
+   return devices;
+}
+
+size_t sdrplay_source_c::get_num_channels()
+{
+   std::cerr << "get_num_channels: 1" << std::endl;
+   return 1;
+}
+
+osmosdr::meta_range_t sdrplay_source_c::get_sample_rates()
+{
+   osmosdr::meta_range_t range;
+
+   range += osmosdr::range_t( 2000e3, 12000e3 ); 
+
+   return range;
+}
+
+double sdrplay_source_c::set_sample_rate(double rate)
+{
+   std::cerr << "set_sample_rate start" << std::endl;
+   double diff = rate - _dev->fsHz;
+   _dev->fsHz = rate;
+
+   std::cerr << "rate = " << rate << std::endl;
+   std::cerr << "diff = " << diff << std::endl;
+   if (_running) 
+   {
+      if (fabs(diff) < 10000.0)
+      {
+         std::cerr << "mir_sdr_SetFs started" << std::endl;
+         mir_sdr_SetFs(diff, 0, 0, 0);
+      }
+      else
+      {
+         std::cerr << "reinit_device started" << std::endl;
+         reinit_device();
+      }
+   }
+   std::cerr << "set_sample_rate end" << std::endl;
+
+   return get_sample_rate();
+}
+
+double sdrplay_source_c::get_sample_rate()
+{
+   if (_running)
+   {
+      return _dev->fsHz;
+   }
+
+//   return 0;
+   return _dev->fsHz;
+}
+
+osmosdr::freq_range_t sdrplay_source_c::get_freq_range( size_t chan )
+{
+   osmosdr::freq_range_t range;
+
+   range += osmosdr::range_t( SDRPLAY_AM_MIN,  SDRPLAY_AM_MAX ); /* LW/MW/SW (150 kHz - 30 MHz) */
+   range += osmosdr::range_t( SDRPLAY_FM_MIN,  SDRPLAY_FM_MAX ); /* VHF Band II (64 - 108 MHz) */
+   range += osmosdr::range_t( SDRPLAY_B3_MIN,  SDRPLAY_B3_MAX ); /* Band III (162 - 240 MHz) */
+   range += osmosdr::range_t( SDRPLAY_B45_MIN, SDRPLAY_B45_MAX ); /* Band IV/V (470 - 960 MHz) */
+   range += osmosdr::range_t( SDRPLAY_L_MIN,   SDRPLAY_L_MAX ); /* L-Band (1450 - 1675 MHz) */
+
+   return range;
+}
+
+double sdrplay_source_c::set_center_freq( double freq, size_t chan )
+{
+   std::cerr << "set_center_freq start" << std::endl;
+   std::cerr << "freq = " << freq << std::endl;
+   double diff = freq - _dev->rfHz;
+   std::cerr << "diff = " << diff << std::endl;
+   _dev->rfHz = freq;
+   set_gain_limits(freq);
+   if (_running) 
+   {
+      if (fabs(diff) < 10000.0)
+      {
+         std::cerr << "mir_sdr_SetRf started" << std::endl;
+         mir_sdr_SetRf(diff, 0, 0);
+      }
+      else
+      {
+         std::cerr << "reinit_device started" << std::endl;
+         reinit_device();
+      }
+   }
+
+   std::cerr << "set_center_freq end" << std::endl;
+   return get_center_freq( chan );
+}
+
+double sdrplay_source_c::get_center_freq( size_t chan )
+{
+   if (_running)
+   {
+      return _dev->rfHz;
+   }
+
+//   return 0;
+   return _dev->rfHz;
+}
+
+double sdrplay_source_c::set_freq_corr( double ppm, size_t chan )
+{
+   return get_freq_corr( chan );
+}
+
+double sdrplay_source_c::get_freq_corr( size_t chan )
+{
+   return 0;
+}
+
+std::vector<std::string> sdrplay_source_c::get_gain_names( size_t chan )
+{
+   std::vector< std::string > gains;
+
+   gains += "LNA_MIX_BB";
+
+   return gains;
+}
+
+osmosdr::gain_range_t sdrplay_source_c::get_gain_range( size_t chan )
+{
+   osmosdr::gain_range_t range;
+
+   for (int i = _dev->minGain; i < _dev->maxGain; i++)
+   {
+      range += osmosdr::range_t( (float)i );
+   }
+
+   return range;
+}
+
+osmosdr::gain_range_t sdrplay_source_c::get_gain_range( const std::string & name, size_t chan )
+{
+   return get_gain_range( chan );
+}
+
+bool sdrplay_source_c::set_gain_mode( bool automatic, size_t chan )
+{
+   std::cerr << "set_gain_mode started" << std::endl;
+   _auto_gain = automatic;
+   std::cerr << "automatic = " << automatic << std::endl;
+   if (automatic)
+   {
+      /* Start AGC */
+   }
+
+   std::cerr << "set_gain_mode end" << std::endl;
+   return get_gain_mode(chan);
+}
+
+bool sdrplay_source_c::get_gain_mode( size_t chan )
+{
+   return _auto_gain;
+}
+
+double sdrplay_source_c::set_gain( double gain, size_t chan )
+{
+   std::cerr << "set_gain started" << std::endl;
+   _dev->gain_dB = gain;
+   std::cerr << "gain = " << gain << std::endl;
+   if (gain < _dev->minGain)
+   {
+      _dev->gain_dB = _dev->minGain;
+   }
+   if (gain > _dev->maxGain)
+   {
+      _dev->gain_dB = _dev->maxGain;
+   }
+   _dev->gRdB = (int)(_dev->maxGain - gain);
+
+   if (_running) 
+   {
+      std::cerr << "mir_sdr_SetGr started" << std::endl;
+      mir_sdr_SetGr(_dev->gRdB, 1, 0);
+   }
+
+std::cerr << "set_gain end" << std::endl;
+return get_gain( chan );
+}
+
+double sdrplay_source_c::set_gain( double gain, const std::string & name, size_t chan)
+{
+   return set_gain( gain, chan );
+}
+
+double sdrplay_source_c::get_gain( size_t chan )
+{
+   if ( _running )
+   {
+      return _dev->gain_dB;
+   }
+
+//   return 0;
+   return _dev->gain_dB;
+}
+
+double sdrplay_source_c::get_gain( const std::string & name, size_t chan )
+{
+   return get_gain( chan );
+}
+
+std::vector< std::string > sdrplay_source_c::get_antennas( size_t chan )
+{
+   std::vector< std::string > antennas;
+
+   antennas += get_antenna( chan );
+
+   return antennas;
+}
+
+std::string sdrplay_source_c::set_antenna( const std::string & antenna, size_t chan )
+{
+   return get_antenna( chan );
+}
+
+std::string sdrplay_source_c::get_antenna( size_t chan )
+{
+   return "RX";
+}
+
+void sdrplay_source_c::set_dc_offset_mode( int mode, size_t chan )
+{
+   if ( osmosdr::source::DCOffsetOff == mode ) 
+   {
+      _dev->dcMode = 0;
+      if (_running)
+      {
+         mir_sdr_SetDcMode(4, 1);
+      }
+   }
+   else if ( osmosdr::source::DCOffsetManual == mode ) 
+   {
+      std::cerr << "Manual DC correction mode is not implemented." << std::endl;
+      _dev->dcMode = 0;
+      if (_running)
+      {
+         mir_sdr_SetDcMode(4, 1);
+      }
+   }
+   else if ( osmosdr::source::DCOffsetAutomatic == mode )
+   {
+      _dev->dcMode = 1;
+      if (_running)
+      {
+         mir_sdr_SetDcMode(4, 1);
+      }
+   }
+}
+
+void sdrplay_source_c::set_dc_offset( const std::complex<double> &offset, size_t chan )
+{
+   std::cerr << "Manual DC correction mode is not implemented." << std::endl;
+}
+
+double sdrplay_source_c::set_bandwidth( double bandwidth, size_t chan )
+{
+   if      (bandwidth <= 200e3)  _dev->bwType = mir_sdr_BW_0_200;
+   else if (bandwidth <= 300e3)  _dev->bwType = mir_sdr_BW_0_300;
+   else if (bandwidth <= 600e3)  _dev->bwType = mir_sdr_BW_0_600;
+   else if (bandwidth <= 1536e3) _dev->bwType = mir_sdr_BW_1_536;
+   else if (bandwidth <= 5000e3) _dev->bwType = mir_sdr_BW_5_000;
+   else if (bandwidth <= 6000e3) _dev->bwType = mir_sdr_BW_6_000;
+   else if (bandwidth <= 7000e3) _dev->bwType = mir_sdr_BW_7_000;
+   else                          _dev->bwType = mir_sdr_BW_8_000;
+
+   if (_running) 
+   {
+      reinit_device();
+   }
+
+   return get_bandwidth( chan );
+}
+
+double sdrplay_source_c::get_bandwidth( size_t chan )
+{
+   return (double)_dev->bwType * 1000.0;
+}
+
+osmosdr::freq_range_t sdrplay_source_c::get_bandwidth_range( size_t chan )
+{
+   osmosdr::freq_range_t range;
+
+   range += osmosdr::range_t( 200e3 ); 
+   range += osmosdr::range_t( 300e3 ); 
+   range += osmosdr::range_t( 600e3 ); 
+   range += osmosdr::range_t( 1536e3 ); 
+   range += osmosdr::range_t( 5000e3 ); 
+   range += osmosdr::range_t( 6000e3 ); 
+   range += osmosdr::range_t( 7000e3 ); 
+   range += osmosdr::range_t( 8000e3 ); 
+
+   return range;
+}
diff --git a/lib/sdrplay/sdrplay_source_c.h b/lib/sdrplay/sdrplay_source_c.h
new file mode 100644
index 0000000..c1a3099
--- /dev/null
+++ b/lib/sdrplay/sdrplay_source_c.h
@@ -0,0 +1,135 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2012 Dimitri Stolnikov <horiz0n@gmx.net>
+ *
+ * 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_SDRPLAY_SOURCE_C_H
+#define INCLUDED_SDRPLAY_SOURCE_C_H
+
+#include <gnuradio/sync_block.h>
+
+#include <gnuradio/thread/thread.h>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/condition_variable.hpp>
+
+#include "osmosdr/ranges.h"
+
+#include "source_iface.h"
+
+class sdrplay_source_c;
+typedef struct sdrplay_dev sdrplay_dev_t;
+
+/*
+ * We use boost::shared_ptr's instead of raw pointers for all access
+ * to gr::blocks (and many other data structures).  The shared_ptr gets
+ * us transparent reference counting, which greatly simplifies storage
+ * management issues.  This is especially helpful in our hybrid
+ * C++ / Python system.
+ *
+ * See http://www.boost.org/libs/smart_ptr/smart_ptr.htm
+ *
+ * As a convention, the _sptr suffix indicates a boost::shared_ptr
+ */
+typedef boost::shared_ptr<sdrplay_source_c> sdrplay_source_c_sptr;
+
+/*!
+ * \brief Return a shared_ptr to a new instance of sdrplay_source_c.
+ *
+ * To avoid accidental use of raw pointers, sdrplay_source_c's
+ * constructor is private.  make_sdrplay_source_c is the public
+ * interface for creating new instances.
+ */
+sdrplay_source_c_sptr make_sdrplay_source_c (const std::string & args = "");
+
+/*!
+ * \brief Provides a stream of complex samples.
+ * \ingroup block
+ */
+class sdrplay_source_c :
+    public gr::sync_block,
+    public source_iface
+{
+private:
+   // The friend declaration allows make_sdrplay_source_c to
+   // access the private constructor.
+
+   friend sdrplay_source_c_sptr make_sdrplay_source_c (const std::string & args);
+
+   /*!
+    * \brief Provides a stream of complex samples.
+    */
+   sdrplay_source_c (const std::string & args);  	// private constructor
+
+public:
+   ~sdrplay_source_c ();	// public destructor
+
+   int work( int noutput_items,
+            gr_vector_const_void_star &input_items,
+            gr_vector_void_star &output_items );
+
+   static std::vector< std::string > get_devices();
+
+   size_t get_num_channels( void );
+
+   osmosdr::meta_range_t get_sample_rates( void );
+   double set_sample_rate( double rate );
+   double get_sample_rate( void );
+
+   osmosdr::freq_range_t get_freq_range( size_t chan = 0 );
+   double set_center_freq( double freq, size_t chan = 0 );
+   double get_center_freq( size_t chan = 0 );
+   double set_freq_corr( double ppm, size_t chan = 0 );
+   double get_freq_corr( size_t chan = 0 );
+
+   std::vector<std::string> get_gain_names( size_t chan = 0 );
+   osmosdr::gain_range_t get_gain_range( size_t chan = 0 );
+   osmosdr::gain_range_t get_gain_range( const std::string & name, size_t chan = 0 );
+   bool set_gain_mode( bool automatic, size_t chan = 0 );
+   bool get_gain_mode( size_t chan = 0 );
+   double set_gain( double gain, size_t chan = 0 );
+   double set_gain( double gain, const std::string & name, size_t chan = 0 );
+   double get_gain( size_t chan = 0 );
+   double get_gain( const std::string & name, size_t chan = 0 );
+
+   std::vector< std::string > get_antennas( size_t chan = 0 );
+   std::string set_antenna( const std::string & antenna, size_t chan = 0 );
+   std::string get_antenna( size_t chan = 0 );
+
+   void set_dc_offset_mode( int mode, size_t chan = 0 );
+   void set_dc_offset( const std::complex<double> &offset, size_t chan = 0 );
+
+   double set_bandwidth( double bandwidth, size_t chan = 0 );
+   double get_bandwidth( size_t chan = 0 );
+   osmosdr::freq_range_t get_bandwidth_range( size_t chan = 0 );
+
+private:
+   void reinit_device(void);
+   void set_gain_limits(double freq);
+
+   sdrplay_dev_t *_dev;
+
+   short _bufi[504];
+   short _bufq[504];
+   int _buf_offset;
+   boost::mutex _buf_mutex;
+
+   bool _running;
+   bool _uninit;
+   bool _auto_gain;
+};
+
+#endif /* INCLUDED_SDRPLAY_SOURCE_C_H */
diff --git a/lib/source_impl.cc b/lib/source_impl.cc
index b9fead3..5d7d305 100644
--- a/lib/source_impl.cc
+++ b/lib/source_impl.cc
@@ -60,6 +60,10 @@
 #include <miri_source_c.h>
 #endif
 
+#ifdef ENABLE_SDRPLAY
+#include <sdrplay_source_c.h>
+#endif
+
 #ifdef ENABLE_HACKRF
 #include <hackrf_source_c.h>
 #endif
@@ -134,6 +138,9 @@ source_impl::source_impl( const std::string &args )
 #ifdef ENABLE_MIRI
   dev_types.push_back("miri");
 #endif
+#ifdef ENABLE_SDRPLAY
+  dev_types.push_back("sdrplay");
+#endif
 #ifdef ENABLE_HACKRF
   dev_types.push_back("hackrf");
 #endif
@@ -197,6 +204,10 @@ source_impl::source_impl( const std::string &args )
     BOOST_FOREACH( std::string dev, miri_source_c::get_devices() )
       dev_list.push_back( dev );
 #endif
+#ifdef ENABLE_SDRPLAY
+    BOOST_FOREACH( std::string dev, sdrplay_source_c::get_devices() )
+      dev_list.push_back( dev );
+#endif
 #ifdef ENABLE_BLADERF
     BOOST_FOREACH( std::string dev, bladerf_source_c::get_devices() )
       dev_list.push_back( dev );
@@ -288,6 +299,13 @@ source_impl::source_impl( const std::string &args )
     }
 #endif
 
+#ifdef ENABLE_SDRPLAY
+    if ( dict.count("sdrplay") ) {
+      sdrplay_source_c_sptr src = make_sdrplay_source_c( arg );
+      block = src; iface = src.get();
+    }
+#endif
+
 #ifdef ENABLE_HACKRF
     if ( dict.count("hackrf") ) {
       hackrf_source_c_sptr src = make_hackrf_source_c( arg );