1 files changed, 437 insertions, 0 deletions
diff --git a/lib/airspyhf/airspyhf_source_c.cc b/lib/airspyhf/airspyhf_source_c.cc
new file mode 100644
index 0000000..26e0134
--- /dev/null
+++ b/lib/airspyhf/airspyhf_source_c.cc
@@ -0,0 +1,437 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2013 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.
+ */
+
+/*
+ * 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 <stdexcept>
+#include <iostream>
+#include <algorithm>
+
+#include <boost/assign.hpp>
+#include <boost/format.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/thread/thread.hpp>
+
+#include <gnuradio/io_signature.h>
+
+#include "airspyhf_source_c.h"
+#include "arg_helpers.h"
+
+using namespace boost::assign;
+
+#define AIRSPYHF_FORMAT_ERROR(ret, msg) \
+  boost::str( boost::format(msg " (%1%)") % ret )
+
+#define AIRSPYHF_THROW_ON_ERROR(ret, msg) \
+  if ( ret != AIRSPYHF_SUCCESS ) \
+  { \
+    throw std::runtime_error( AIRSPYHF_FORMAT_ERROR(ret, msg) ); \
+  }
+
+#define AIRSPYHF_FUNC_STR(func, arg) \
+  boost::str(boost::format(func "(%1%)") % arg) + " has failed"
+
+airspyhf_source_c_sptr make_airspyhf_source_c (const std::string & args)
+{
+  return gnuradio::get_initial_sptr(new airspyhf_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
+ */
+airspyhf_source_c::airspyhf_source_c (const std::string &args)
+  : gr::sync_block ("airspyhf_source_c",
+        gr::io_signature::make(MIN_IN, MAX_IN, sizeof (gr_complex)),
+        gr::io_signature::make(MIN_OUT, MAX_OUT, sizeof (gr_complex))),
+    _dev(NULL),
+    _sample_rate(0),
+    _center_freq(0),
+    _freq_corr(0)
+{
+  int ret;
+
+  dict_t dict = params_to_dict(args);
+
+  _dev = NULL;
+  ret = airspyhf_open( &_dev );
+  AIRSPYHF_THROW_ON_ERROR(ret, "Failed to open Airspy HF+ device")
+
+  uint32_t num_rates;
+  airspyhf_get_samplerates(_dev, &num_rates, 0);
+  uint32_t *samplerates = (uint32_t *) malloc(num_rates * sizeof(uint32_t));
+  airspyhf_get_samplerates(_dev, samplerates, num_rates);
+  for (size_t i = 0; i < num_rates; i++)
+    _sample_rates.push_back( std::pair<double, uint32_t>( samplerates[i], i ) );
+  free(samplerates);
+
+  /* since they may (and will) give us an unsorted array we have to sort it here
+   * to play nice with the monotonic requirement of meta-range later on */
+  std::sort(_sample_rates.begin(), _sample_rates.end());
+
+  std::cerr << "Using libairspyhf" << AIRSPYHF_VERSION << ", samplerates: ";
+
+  for (size_t i = 0; i < _sample_rates.size(); i++)
+    std::cerr << boost::format("%gM ") % (_sample_rates[i].first / 1e6);
+
+  std::cerr << std::endl;
+
+  set_center_freq( (get_freq_range().start() + get_freq_range().stop()) / 2.0 );
+  set_sample_rate( get_sample_rates().start() );
+
+  _fifo = new boost::circular_buffer<gr_complex>(5000000);
+  if (!_fifo) {
+    throw std::runtime_error( std::string(__FUNCTION__) + " " +
+                              "Failed to allocate a sample FIFO!" );
+  }
+}
+
+/*
+ * Our virtual destructor.
+ */
+airspyhf_source_c::~airspyhf_source_c ()
+{
+  int ret;
+
+  if (_dev) {
+    if ( airspyhf_is_streaming( _dev ) )
+    {
+      ret = airspyhf_stop( _dev );
+      if ( ret != AIRSPYHF_SUCCESS )
+      {
+        std::cerr << AIRSPYHF_FORMAT_ERROR(ret, "Failed to stop RX streaming") << std::endl;
+      }
+    }
+
+    ret = airspyhf_close( _dev );
+    if ( ret != AIRSPYHF_SUCCESS )
+    {
+      std::cerr << AIRSPYHF_FORMAT_ERROR(ret, "Failed to close AirSpy") << std::endl;
+    }
+    _dev = NULL;
+  }
+
+  if (_fifo)
+  {
+    delete _fifo;
+    _fifo = NULL;
+  }
+}
+
+int airspyhf_source_c::_airspyhf_rx_callback(airspyhf_transfer_t *transfer)
+{
+  airspyhf_source_c *obj = (airspyhf_source_c *)transfer->ctx;
+
+  return obj->airspyhf_rx_callback((float *)transfer->samples, transfer->sample_count);
+}
+
+int airspyhf_source_c::airspyhf_rx_callback(void *samples, int sample_count)
+{
+  size_t i, n_avail, to_copy, num_samples = sample_count;
+  float *sample = (float *)samples;
+
+  _fifo_lock.lock();
+
+  n_avail = _fifo->capacity() - _fifo->size();
+  to_copy = (n_avail < num_samples ? n_avail : num_samples);
+
+  for (i = 0; i < to_copy; i++ )
+  {
+    /* Push sample to the fifo */
+    _fifo->push_back( gr_complex( *sample, *(sample+1) ) );
+
+    /* offset to the next I+Q sample */
+    sample += 2;
+  }
+
+  _fifo_lock.unlock();
+
+  /* We have made some new samples available to the consumer in work() */
+  if (to_copy) {
+    //std::cerr << "+" << std::flush;
+    _samp_avail.notify_one();
+  }
+
+  /* Indicate overrun, if neccesary */
+  if (to_copy < num_samples)
+    std::cerr << "O" << std::flush;
+
+  return 0; // TODO: return -1 on error/stop
+}
+
+bool airspyhf_source_c::start()
+{
+  if ( ! _dev )
+    return false;
+
+  int ret = airspyhf_start( _dev, _airspyhf_rx_callback, (void *)this );
+  if ( ret != AIRSPYHF_SUCCESS ) {
+    std::cerr << "Failed to start RX streaming (" << ret << ")" << std::endl;
+    return false;
+  }
+
+  return true;
+}
+
+bool airspyhf_source_c::stop()
+{
+  if ( ! _dev )
+    return false;
+
+  int ret = airspyhf_stop( _dev );
+  if ( ret != AIRSPYHF_SUCCESS ) {
+    std::cerr << "Failed to stop RX streaming (" << ret << ")" << std::endl;
+    return false;
+  }
+
+  return true;
+}
+
+int airspyhf_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];
+
+  bool running = false;
+
+  if ( _dev )
+    running = airspyhf_is_streaming( _dev );
+
+  if ( ! running )
+    return WORK_DONE;
+
+  std::unique_lock<std::mutex> lock(_fifo_lock);
+
+  /* Wait until we have the requested number of samples */
+  int n_samples_avail = _fifo->size();
+
+  while (n_samples_avail < noutput_items) {
+    _samp_avail.wait(lock);
+    n_samples_avail = _fifo->size();
+  }
+
+  for(int i = 0; i < noutput_items; ++i) {
+    out[i] = _fifo->at(0);
+    _fifo->pop_front();
+  }
+
+  return noutput_items;
+}
+
+std::vector<std::string> airspyhf_source_c::get_devices()
+{
+  std::vector<std::string> devices;
+  std::string label;
+
+  int ret;
+  airspyhf_device *dev = NULL;
+  ret = airspyhf_open(&dev);
+  if ( AIRSPYHF_SUCCESS == ret )
+  {
+    std::string args = "airspyhf=0,label='AirspyHF'";
+    devices.push_back( args );
+    ret = airspyhf_close(dev);
+  }
+
+  return devices;
+}
+
+size_t airspyhf_source_c::get_num_channels()
+{
+  return 1;
+}
+
+osmosdr::meta_range_t airspyhf_source_c::get_sample_rates()
+{
+  osmosdr::meta_range_t range;
+
+  for (size_t i = 0; i < _sample_rates.size(); i++)
+    range += osmosdr::range_t( _sample_rates[i].first );
+
+  return range;
+}
+
+double airspyhf_source_c::set_sample_rate( double rate )
+{
+  int ret = AIRSPYHF_SUCCESS;
+
+  if (_dev) {
+    bool found_supported_rate = false;
+    uint32_t samp_rate_index = 0;
+
+    for( unsigned int i = 0; i < _sample_rates.size(); i++ )
+    {
+      if( _sample_rates[i].first == rate )
+      {
+        samp_rate_index = _sample_rates[i].second;
+
+        found_supported_rate = true;
+      }
+    }
+
+    if ( ! found_supported_rate )
+    {
+      throw std::runtime_error(
+        boost::str( boost::format("Unsupported samplerate: %gM") % (rate/1e6) ) );
+    }
+
+    ret = airspyhf_set_samplerate( _dev, samp_rate_index );
+    if ( AIRSPYHF_SUCCESS == ret ) {
+      _sample_rate = rate;
+    } else {
+      AIRSPYHF_THROW_ON_ERROR( ret, AIRSPYHF_FUNC_STR( "airspyhf_set_samplerate", rate ) )
+    }
+  }
+
+  return get_sample_rate();
+}
+
+double airspyhf_source_c::get_sample_rate()
+{
+  return _sample_rate;
+}
+
+osmosdr::freq_range_t airspyhf_source_c::get_freq_range( size_t chan )
+{
+  osmosdr::freq_range_t range;
+
+  range += osmosdr::range_t( 0.0, 260.0e6 );
+
+  return range;
+}
+
+double airspyhf_source_c::set_center_freq( double freq, size_t chan )
+{
+  int ret;
+
+  if (_dev) {
+    ret = airspyhf_set_freq( _dev, freq );
+    if ( AIRSPYHF_SUCCESS == ret ) {
+      _center_freq = freq;
+    } else {
+      AIRSPYHF_THROW_ON_ERROR( ret, AIRSPYHF_FUNC_STR( "airspyhf_set_freq", freq ) )
+    }
+  }
+
+  return get_center_freq( chan );
+}
+
+double airspyhf_source_c::get_center_freq( size_t chan )
+{
+  return _center_freq;
+}
+
+double airspyhf_source_c::set_freq_corr( double ppm, size_t chan )
+{
+  int ret;
+  int32_t ppb = (int32_t) (ppm * 1.0e3);
+
+  if (_dev) {
+    ret = airspyhf_set_calibration( _dev, ppb );
+    if ( AIRSPYHF_SUCCESS == ret ) {
+      _freq_corr = ppm;
+    } else {
+      AIRSPYHF_THROW_ON_ERROR( ret, AIRSPYHF_FUNC_STR( "airspyhf_set_calibration", ppm ) )
+    }
+  }
+
+  return ppm;
+}
+
+double airspyhf_source_c::get_freq_corr( size_t chan )
+{
+  return _freq_corr;
+}
+
+std::vector<std::string> airspyhf_source_c::get_gain_names( size_t chan )
+{
+  return {};
+}
+
+osmosdr::gain_range_t airspyhf_source_c::get_gain_range( size_t chan )
+{
+  return osmosdr::gain_range_t();
+}
+
+osmosdr::gain_range_t airspyhf_source_c::get_gain_range( const std::string & name, size_t chan )
+{
+  return osmosdr::gain_range_t();
+}
+
+
+double airspyhf_source_c::set_gain( double gain, size_t chan )
+{
+  return gain;
+}
+
+double airspyhf_source_c::set_gain( double gain, const std::string & name, size_t chan)
+{
+  return gain;
+}
+
+double airspyhf_source_c::get_gain( size_t chan )
+{
+  return 0.0;
+}
+
+double airspyhf_source_c::get_gain( const std::string & name, size_t chan )
+{
+  return 0.0;
+}
+
+std::vector< std::string > airspyhf_source_c::get_antennas( size_t chan )
+{
+  std::vector< std::string > antennas;
+
+  antennas += get_antenna( chan );
+
+  return antennas;
+}
+
+std::string airspyhf_source_c::set_antenna( const std::string & antenna, size_t chan )
+{
+  return get_antenna( chan );
+}
+
+std::string airspyhf_source_c::get_antenna( size_t chan )
+{
+  return "RX";
+}