gnss-sdr/src/algorithms/signal_source/adapters/labsat_signal_source.cc

/*!
 * \file labsat_signal_source.cc
 * \brief Labsat 2 and 3 front-end signal sampler driver
 * \author Javier Arribas, jarribas(at)cttc.es
 *
 * -----------------------------------------------------------------------------
 *
 * GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
 * This file is part of GNSS-SDR.
 *
 * Copyright (C) 2010-2020  (see AUTHORS file for a list of contributors)
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * -----------------------------------------------------------------------------
 */

#include "labsat_signal_source.h"
#include "configuration_interface.h"
#include "gnss_sdr_string_literals.h"
#include "labsat23_source.h"
#include <glog/logging.h>

using namespace std::string_literals;

LabsatSignalSource::LabsatSignalSource(const ConfigurationInterface* configuration,
    const std::string& role, unsigned int in_stream, unsigned int out_stream, Concurrent_Queue<pmt::pmt_t>* queue)
    : SignalSourceBase(configuration, role, "Labsat_Signal_Source"s), in_stream_(in_stream), out_stream_(out_stream)
{
    const std::string default_item_type("gr_complex");
    const std::string default_dump_file("./labsat_output.dat");
    item_type_ = configuration->property(role + ".item_type", default_item_type);
    dump_ = configuration->property(role + ".dump", false);
    dump_filename_ = configuration->property(role + ".dump_filename", default_dump_file);

    enable_throttle_control_ = configuration->property(role + ".enable_throttle_control", false);

    const int64_t sampling_frequency_deprecated = configuration->property(role + ".sampling_frequency", static_cast<int64_t>(16368000));
    const int64_t throttle_frequency_sps = configuration->property(role + ".throttle_frequency_sps", static_cast<int64_t>(sampling_frequency_deprecated));

    const int channel_selector = configuration->property(role + ".selected_channel", 1);

    const std::string default_filename("./example_capture.LS3");
    filename_ = configuration->property(role + ".filename", default_filename);

    if (item_type_ == "gr_complex")
        {
            item_size_ = sizeof(gr_complex);
            labsat23_source_ = labsat23_make_source_sptr(filename_.c_str(), channel_selector, queue);
            DLOG(INFO) << "Item size " << item_size_;
            DLOG(INFO) << "labsat23_source_(" << labsat23_source_->unique_id() << ")";
        }
    else
        {
            LOG(WARNING) << item_type_ << " unrecognized item type for LabSat source";
            item_size_ = sizeof(int16_t);
        }
    if (dump_)
        {
            DLOG(INFO) << "Dumping output into file " << dump_filename_;
            DLOG(INFO) << "file_sink(" << file_sink_->unique_id() << ")";
            file_sink_ = gr::blocks::file_sink::make(item_size_, dump_filename_.c_str());
        }

    if (enable_throttle_control_)
        {
            throttle_ = gr::blocks::throttle::make(item_size_, throttle_frequency_sps);
        }

    if (in_stream_ > 0)
        {
            LOG(ERROR) << "A signal source does not have an input stream";
        }
    if (out_stream_ > 1)
        {
            LOG(ERROR) << "This implementation only supports one output stream";
        }
}


void LabsatSignalSource::connect(gr::top_block_sptr top_block)
{
    if (enable_throttle_control_ == true)
        {
            top_block->connect(labsat23_source_, 0, throttle_, 0);
            DLOG(INFO) << "connected labsat23_source_ to throttle";
            if (dump_)
                {
                    top_block->connect(labsat23_source_, 0, file_sink_, 0);
                    DLOG(INFO) << "connected labsat23_source_to sink";
                }
        }
    else
        {
            if (dump_)
                {
                    top_block->connect(labsat23_source_, 0, file_sink_, 0);
                    DLOG(INFO) << "connected labsat23_source_ to sink";
                }
            else
                {
                    DLOG(INFO) << "nothing to connect internally";
                }
        }
}


void LabsatSignalSource::disconnect(gr::top_block_sptr top_block)
{
    if (enable_throttle_control_ == true)
        {
            top_block->disconnect(labsat23_source_, 0, throttle_, 0);
            DLOG(INFO) << "disconnected labsat23_source_ to throttle";
            if (dump_)
                {
                    top_block->disconnect(labsat23_source_, 0, file_sink_, 0);
                    DLOG(INFO) << "disconnected labsat23_source_ to sink";
                }
        }
    else
        {
            if (dump_)
                {
                    top_block->disconnect(labsat23_source_, 0, file_sink_, 0);
                    DLOG(INFO) << "disconnected labsat23_source_ to sink";
                }
        }
}


gr::basic_block_sptr LabsatSignalSource::get_left_block()
{
    LOG(WARNING) << "Left block of a signal source should not be retrieved";
    return gr::block_sptr();
}


gr::basic_block_sptr LabsatSignalSource::get_right_block()
{
    if (enable_throttle_control_ == true)
        {
            return throttle_;
        }
    return labsat23_source_;
}