GNU Radio block for interfacing with various radio hardware
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gr-osmosdr/lib/file/file_source_c.cc

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/* -*- 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.
*/
#include <fstream>
#include <string>
#include <sstream>
#include <boost/assign.hpp>
#include <boost/format.hpp>
#include <gr_io_signature.h>
#include "file_source_c.h"
#include <osmosdr_arg_helpers.h>
using namespace boost::assign;
file_source_c_sptr make_file_source_c(const std::string &args)
{
return gnuradio::get_initial_sptr(new file_source_c(args));
}
file_source_c::file_source_c(const std::string &args) :
gr_hier_block2("file_source_c",
gr_make_io_signature (0, 0, 0),
gr_make_io_signature (1, 1, sizeof (gr_complex)))
{
std::string filename;
bool repeat = true;
bool throttle = true;
_freq = 0;
_rate = 0;
dict_t dict = params_to_dict(args);
if (dict.count("file"))
filename = dict["file"];
if (dict.count("freq"))
_freq = boost::lexical_cast< double >( dict["freq"] );
if (dict.count("rate"))
_rate = boost::lexical_cast< double >( dict["rate"] );
if (dict.count("repeat"))
repeat = ("true" == dict["repeat"] ? true : false);
if (dict.count("throttle"))
throttle = ("true" == dict["throttle"] ? true : false);
if (!filename.length())
throw std::runtime_error("No file name specified.");
if (_freq < 0)
throw std::runtime_error("Parameter 'freq' may not be negative.");
if (0 == _rate && throttle)
throw std::runtime_error("Parameter 'rate' is missing in arguments.");
_file_rate = _rate;
_source = gr_make_file_source( sizeof(gr_complex),
filename.c_str(),
repeat );
_throttle = gr_make_throttle( sizeof(gr_complex), _file_rate );
if (throttle) {
connect( _source, 0, _throttle, 0 );
connect( _throttle, 0, self(), 0 );
} else {
connect( _source, 0, self(), 0 );
}
}
file_source_c::~file_source_c()
{
}
std::string file_source_c::name()
{
return "IQ File Source";
}
std::vector<std::string> file_source_c::get_devices( bool fake )
{
std::vector<std::string> devices;
if ( fake )
{
std::string args = "file='/path/to/your/file'";
args += ",rate=1e6,freq=100e6,repeat=true,throttle=true";
args += ",label='Complex Sampled (IQ) File'";
devices.push_back( args );
}
return devices;
}
size_t file_source_c::get_num_channels( void )
{
return 1;
}
bool file_source_c::seek( long seek_point, int whence , size_t chan )
{
return _source->seek( seek_point, whence );
}
osmosdr::meta_range_t file_source_c::get_sample_rates( void )
{
osmosdr::meta_range_t range;
range += osmosdr::range_t( _file_rate ); /* always return file's original rate */
return range;
}
double file_source_c::set_sample_rate( double rate )
{
if ( _file_rate != rate )
{
std::cerr << boost::format("WARNING: Overriding original sample rate of %g with %g")
% _file_rate % rate
<< std::endl;
}
_throttle->set_sample_rate( rate );
_rate = rate;
return get_sample_rate();
}
double file_source_c::get_sample_rate( void )
{
return _rate;
}
osmosdr::freq_range_t file_source_c::get_freq_range( size_t chan )
{
return osmosdr::freq_range_t(_freq, _freq);
}
double file_source_c::set_center_freq( double freq, size_t chan )
{
return get_center_freq(chan);
}
double file_source_c::get_center_freq( size_t chan )
{
return _freq;
}
double file_source_c::set_freq_corr( double ppm, size_t chan )
{
return get_freq_corr( chan );
}
double file_source_c::get_freq_corr( size_t chan )
{
return 0;
}
std::vector<std::string> file_source_c::get_gain_names( size_t chan )
{
return std::vector< std::string >();
}
osmosdr::gain_range_t file_source_c::get_gain_range( size_t chan )
{
return osmosdr::gain_range_t();
}
osmosdr::gain_range_t file_source_c::get_gain_range( const std::string & name, size_t chan )
{
return get_gain_range( chan );
}
double file_source_c::set_gain( double gain, size_t chan )
{
return get_gain(chan);
}
double file_source_c::set_gain( double gain, const std::string & name, size_t chan )
{
return set_gain(chan);
}
double file_source_c::get_gain( size_t chan )
{
return 0;
}
double file_source_c::get_gain( const std::string & name, size_t chan )
{
return get_gain(chan);
}
std::vector< std::string > file_source_c::get_antennas( size_t chan )
{
return std::vector< std::string >();
}
std::string file_source_c::set_antenna( const std::string & antenna, size_t chan )
{
return get_antenna(chan);
}
std::string file_source_c::get_antenna( size_t chan )
{
return "";
}