mirror of https://github.com/gnss-sdr/gnss-sdr
312 lines
13 KiB
C++
312 lines
13 KiB
C++
/*!
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* \file spir_gss6450_file_signal_source.cc
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* \brief Implementation of a class that reads signals samples from a SPIR file
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* and adapts it to a SignalSourceInterface.
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* \author Antonio Ramos, 2017 antonio.ramos(at)cttc.es
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*
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* -----------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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* This file is not part of GNSS-SDR.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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#include "spir_gss6450_file_signal_source.h"
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#include "configuration_interface.h"
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#include "gnss_sdr_string_literals.h"
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#include <glog/logging.h>
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#include <exception>
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#include <fstream>
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#include <iomanip>
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#include <iostream>
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#include <utility>
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using namespace std::string_literals;
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SpirGSS6450FileSignalSource::SpirGSS6450FileSignalSource(const ConfigurationInterface* configuration,
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const std::string& role, uint32_t in_streams, uint32_t out_streams, Concurrent_Queue<pmt::pmt_t>* queue)
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: SignalSourceBase(configuration, role, "Spir_GSS6450_File_Signal_Source"s), in_streams_(in_streams), out_streams_(out_streams)
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{
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const std::string default_filename("../data/my_capture.dat");
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const std::string default_dump_filename("../data/my_capture_dump.dat");
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item_type_ = "int";
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samples_ = configuration->property(role + ".samples", static_cast<uint64_t>(0));
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sampling_frequency_ = configuration->property(role + ".sampling_frequency", static_cast<int64_t>(0));
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filename_ = configuration->property(role + ".filename", default_filename);
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repeat_ = configuration->property(role + ".repeat", false);
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dump_ = configuration->property(role + ".dump", false);
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endian_swap_ = configuration->property(role + ".endian", false);
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dump_filename_ = configuration->property(role + ".dump_filename", default_dump_filename);
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enable_throttle_control_ = configuration->property(role + ".enable_throttle_control", false);
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adc_bits_ = configuration->property(role + ".adc_bits", 4);
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n_channels_ = configuration->property(role + ".total_channels", 1);
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sel_ch_ = configuration->property(role + ".sel_ch", 1);
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item_size_ = sizeof(int32_t);
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const int64_t bytes_seek = configuration->property(role + ".bytes_to_skip", static_cast<int64_t>(65536));
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const double sample_size_byte = static_cast<double>(adc_bits_) / 4.0;
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if (sel_ch_ > n_channels_)
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{
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LOG(WARNING) << "Invalid RF channel selection";
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}
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if (n_channels_ > 1)
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{
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for (int32_t i = 0; i < n_channels_; i++)
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{
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null_sinks_.push_back(gr::blocks::null_sink::make(sizeof(gr_complex)));
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unpack_spir_vec_.push_back(make_unpack_spir_gss6450_samples(adc_bits_));
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if (endian_swap_)
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{
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endian_vec_.push_back(gr::blocks::endian_swap::make(item_size_));
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}
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}
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}
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try
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{
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file_source_ = gr::blocks::file_source::make(item_size_, filename_.c_str(), repeat_);
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file_source_->seek(bytes_seek / item_size_, SEEK_SET);
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deint_ = gr::blocks::deinterleave::make(item_size_);
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}
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catch (const std::exception& e)
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{
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std::cerr
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<< "The receiver was configured to work with a file signal source "
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<< '\n'
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<< "but the specified file is unreachable by GNSS-SDR."
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<< '\n'
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<< "Please modify your configuration file"
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<< '\n'
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<< "and point SignalSource.filename to a valid raw data file. Then:"
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<< '\n'
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<< "$ gnss-sdr --config_file=/path/to/my_GNSS_SDR_configuration.conf"
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<< '\n'
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<< "Examples of configuration files available at:"
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<< '\n'
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<< GNSSSDR_INSTALL_DIR "/share/gnss-sdr/conf/"
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<< '\n';
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LOG(WARNING) << "file_signal_source: Unable to open the samples file "
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<< filename_.c_str() << ", exiting the program.";
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throw(e);
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}
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DLOG(INFO) << "file_source(" << file_source_->unique_id() << ")";
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if (samples_ == 0) // read all file
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{
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/*!
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* BUG workaround: The GNU Radio file source does not stop the receiver after reaching the End of File.
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* A possible solution is to compute the file length in samples using file size, excluding the last 2 milliseconds, and enable always the
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* valve block
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*/
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std::ifstream file(filename_.c_str(), std::ios::in | std::ios::binary | std::ios::ate);
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std::ifstream::pos_type size;
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if (file.is_open())
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{
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size = file.tellg();
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LOG(INFO) << "Total samples in the file= " << floor(static_cast<double>(size) / static_cast<double>(item_size_));
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}
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else
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{
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std::cout << "file_signal_source: Unable to open the samples file " << filename_.c_str() << '\n';
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LOG(ERROR) << "file_signal_source: Unable to open the samples file " << filename_.c_str();
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}
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std::streamsize ss = std::cout.precision();
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std::cout << std::setprecision(16);
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std::cout << "Processing file " << filename_ << ", which contains " << size << " [bytes]\n";
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std::cout.precision(ss);
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if (size > 0)
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{
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samples_ = static_cast<uint64_t>(floor(static_cast<double>(static_cast<int64_t>(size) - static_cast<int64_t>(bytes_seek)) / (sample_size_byte * static_cast<double>(n_channels_))));
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samples_ = samples_ - static_cast<uint64_t>(ceil(0.002 * sampling_frequency_)); // process all the samples available in the file excluding the last 2 ms
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}
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}
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CHECK(samples_ > 0) << "File does not contain enough samples to process.";
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double signal_duration_s = static_cast<double>(samples_) / sampling_frequency_;
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LOG(INFO) << "Total number samples to be processed= " << samples_ << " GNSS signal duration= " << signal_duration_s << " [s]";
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std::cout << "GNSS signal recorded time to be processed: " << signal_duration_s << " [s]\n";
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for (int32_t i = 0; i < n_channels_; i++)
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{
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valve_vec_.emplace_back(gnss_sdr_make_valve(sizeof(gr_complex), samples_, queue));
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if (dump_)
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{
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std::string tmp_str = dump_filename_ + "_ch" + std::to_string(i);
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sink_vec_.push_back(gr::blocks::file_sink::make(sizeof(gr_complex), tmp_str.c_str()));
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}
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if (enable_throttle_control_)
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{
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throttle_vec_.push_back(gr::blocks::throttle::make(sizeof(gr_complex), sampling_frequency_));
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}
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}
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DLOG(INFO) << "File source filename " << filename_;
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DLOG(INFO) << "Samples " << samples_;
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DLOG(INFO) << "Sampling frequency " << sampling_frequency_;
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DLOG(INFO) << "Item type " << item_type_;
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DLOG(INFO) << "Item size " << item_size_;
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DLOG(INFO) << "Repeat " << repeat_;
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DLOG(INFO) << "Dump " << dump_;
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DLOG(INFO) << "Dump filename " << dump_filename_;
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if (in_streams_ > 0)
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{
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LOG(ERROR) << "A signal source does not have an input stream";
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}
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if (out_streams_ > 1)
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{
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LOG(ERROR) << "This implementation only supports one output stream";
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}
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}
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void SpirGSS6450FileSignalSource::connect(gr::top_block_sptr top_block)
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{
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if (samples_ > 0)
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{
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top_block->connect(file_source_, 0, deint_, 0);
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if (endian_swap_)
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{
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top_block->connect(deint_, sel_ch_ - 1, endian_vec_.at(sel_ch_ - 1), 0);
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top_block->connect(endian_vec_.at(sel_ch_ - 1), 0, unpack_spir_vec_.at(sel_ch_ - 1), 0);
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}
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else
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{
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top_block->connect(deint_, sel_ch_ - 1, unpack_spir_vec_.at(sel_ch_ - 1), 0);
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}
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if (n_channels_ > 1)
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{
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uint32_t aux = 0;
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for (int32_t i = 0; i < n_channels_; i++)
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{
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if (i != (sel_ch_ - 1))
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{
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if (endian_swap_)
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{
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top_block->connect(deint_, i, endian_vec_.at(i), 0);
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top_block->connect(endian_vec_.at(i), 0, unpack_spir_vec_.at(i), 0);
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}
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else
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{
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top_block->connect(deint_, i, unpack_spir_vec_.at(i), 0);
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}
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aux++;
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}
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}
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}
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for (int32_t i = 0; i < n_channels_; i++)
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{
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if (enable_throttle_control_)
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{
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top_block->connect(unpack_spir_vec_.at(i), 0, throttle_vec_.at(i), 0);
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top_block->connect(throttle_vec_.at(i), 0, valve_vec_.at(i), 0);
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}
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else
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{
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top_block->connect(unpack_spir_vec_.at(i), 0, valve_vec_.at(i), 0);
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}
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if (dump_)
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{
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top_block->connect(valve_vec_.at(i), 0, sink_vec_.at(i), 0);
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}
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top_block->connect(valve_vec_.at(i), 0, null_sinks_.at(i), 0);
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}
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}
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else
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{
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LOG(WARNING) << "0 samples to read";
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}
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}
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void SpirGSS6450FileSignalSource::disconnect(gr::top_block_sptr top_block)
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{
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if (samples_ > 0)
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{
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top_block->disconnect(file_source_, 0, deint_, 0);
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if (endian_swap_)
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{
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top_block->disconnect(deint_, sel_ch_ - 1, endian_vec_.at(sel_ch_ - 1), 0);
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top_block->disconnect(endian_vec_.at(sel_ch_ - 1), 0, unpack_spir_vec_.at(sel_ch_ - 1), 0);
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}
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else
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{
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top_block->disconnect(deint_, sel_ch_ - 1, unpack_spir_vec_.at(sel_ch_ - 1), 0);
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}
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if (n_channels_ > 1)
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{
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uint32_t aux = 0;
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for (int32_t i = 0; i < n_channels_; i++)
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{
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if (i != (sel_ch_ - 1))
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{
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if (endian_swap_)
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{
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top_block->disconnect(deint_, i, endian_vec_.at(i), 0);
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top_block->disconnect(endian_vec_.at(i), 0, unpack_spir_vec_.at(i), 0);
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}
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else
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{
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top_block->disconnect(deint_, i, unpack_spir_vec_.at(i), 0);
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}
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aux++;
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}
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}
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}
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for (int32_t i = 0; i < (n_channels_); i++)
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{
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if (enable_throttle_control_)
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{
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top_block->disconnect(unpack_spir_vec_.at(i), 0, throttle_vec_.at(i), 0);
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top_block->disconnect(throttle_vec_.at(i), 0, valve_vec_.at(i), 0);
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}
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else
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{
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top_block->disconnect(unpack_spir_vec_.at(i), 0, valve_vec_.at(i), 0);
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}
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if (dump_)
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{
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top_block->disconnect(valve_vec_.at(i), 0, sink_vec_.at(i), 0);
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}
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top_block->disconnect(valve_vec_.at(i), 0, null_sinks_.at(i), 0);
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}
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}
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else
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{
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LOG(WARNING) << "Nothing to disconnect";
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}
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}
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gr::basic_block_sptr SpirGSS6450FileSignalSource::get_left_block()
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{
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LOG(WARNING) << "Left block of a signal source should not be retrieved";
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return gr::blocks::file_source::sptr();
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}
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gr::basic_block_sptr SpirGSS6450FileSignalSource::get_right_block(int RF_channel)
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{
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return valve_vec_.at(RF_channel);
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}
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gr::basic_block_sptr SpirGSS6450FileSignalSource::get_right_block()
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{
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return valve_vec_.at(0);
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}
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