mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2025-11-25 19:44:55 +00:00
Added new file source adapter:
2 bits complex file source for GNSS-SDR GSoC 2015 signal sampler designed by Ajith Peter
This commit is contained in:
Javier
@@ -135,7 +135,8 @@ set(SIGNAL_SOURCE_ADAPTER_SOURCES file_signal_source.cc
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gen_signal_source.cc
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nsr_file_signal_source.cc
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spir_file_signal_source.cc
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rtl_tcp_signal_source.cc
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rtl_tcp_signal_source.cc
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two_bit_cpx_file_signal_source.cc
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${OPT_DRIVER_SOURCES}
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)
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@@ -0,0 +1,337 @@
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/*!
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* \file nsr_file_signal_source.cc
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* \brief Implementation of a class that reads signals samples from a NSR 2 bits sampler front-end file
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* and adapts it to a SignalSourceInterface. More information about the front-end here
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* http://www.ifen.com/products/sx-scientific-gnss-solutions/nsr-software-receiver.html
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* \author Javier Arribas, 2013 jarribas(at)cttc.es
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#include "two_bit_cpx_file_signal_source.h"
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#include <cstdlib>
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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 <gflags/gflags.h>
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#include <glog/logging.h>
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#include "gnss_sdr_valve.h"
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#include "configuration_interface.h"
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using google::LogMessage;
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//DEFINE_string(two_bit_cpx_signal_source, "-",
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// "If defined, path to the file containing the NSR (byte to 2-bit packed) signal samples (overrides the configuration file)");
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TwoBitCpxFileSignalSource::TwoBitCpxFileSignalSource(ConfigurationInterface* configuration,
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std::string role, unsigned int in_streams, unsigned int out_streams,
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boost::shared_ptr<gr::msg_queue> queue) :
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role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(queue)
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{
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std::string default_filename = "../data/my_capture.dat";
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std::string default_item_type = "byte";
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std::string default_dump_filename = "../data/my_capture_dump.dat";
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samples_ = configuration->property(role + ".samples", 0);
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sampling_frequency_ = configuration->property(role + ".sampling_frequency", 0);
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filename_ = configuration->property(role + ".filename", default_filename);
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// override value with commandline flag, if present
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//if (FLAGS_nsr_signal_source.compare("-") != 0) filename_= FLAGS_nsr_signal_source;
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item_type_ = configuration->property(role + ".item_type", default_item_type);
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repeat_ = configuration->property(role + ".repeat", false);
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dump_ = configuration->property(role + ".dump", 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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if (item_type_.compare("byte") == 0)
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{
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item_size_ = sizeof(char);
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}
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else
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{
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LOG(WARNING) << item_type_ << " unrecognized item type. Using byte.";
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item_size_ = sizeof(char);
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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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unpack_byte_ = make_unpack_byte_2bit_cpx_samples();
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inter_shorts_to_cpx_ = gr::blocks::interleaved_short_to_complex::make(false,true); //I/Q swap enabled
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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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<< std::endl
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<< "but the specified file is unreachable by GNSS-SDR."
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<< std::endl
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<< "Please modify your configuration file"
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<< std::endl
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<< "and point SignalSource.filename to a valid raw data file. Then:"
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<< std::endl
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<< "$ gnss-sdr --config_file=/path/to/my_GNSS_SDR_configuration.conf"
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<< std::endl
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<< "Examples of configuration files available at:"
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<< std::endl
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<< GNSSSDR_INSTALL_DIR "/share/gnss-sdr/conf/"
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<< std::endl;
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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((double)size / (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() << std::endl;
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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::cout << std::setprecision(16);
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std::cout << "Processing file " << filename_ << ", which contains " << (double)size << " [bytes]" << std::endl;
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if (size > 0)
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{
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int sample_packet_factor = 2; // 1 byte -> 2 samples
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samples_ = floor((double)size / (double)item_size())*sample_packet_factor;
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samples_ = samples_- ceil(0.002 * (double)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;
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signal_duration_s = (double)samples_ * ( 1 /(double)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]" << std::endl;
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valve_ = gnss_sdr_make_valve(sizeof(gr_complex), samples_, queue_);
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DLOG(INFO) << "valve(" << valve_->unique_id() << ")";
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if (dump_)
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{
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//sink_ = gr_make_file_sink(item_size_, dump_filename_.c_str());
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sink_ = gr::blocks::file_sink::make(sizeof(gr_complex), dump_filename_.c_str());
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DLOG(INFO) << "file_sink(" << sink_->unique_id() << ")";
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}
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if (enable_throttle_control_)
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{
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throttle_ = gr::blocks::throttle::make(sizeof(gr_complex), sampling_frequency_);
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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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}
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TwoBitCpxFileSignalSource::~TwoBitCpxFileSignalSource()
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{}
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void TwoBitCpxFileSignalSource::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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if (enable_throttle_control_ == true)
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{
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top_block->connect(file_source_, 0, unpack_byte_, 0);
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top_block->connect(unpack_byte_, 0,inter_shorts_to_cpx_,0);
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top_block->connect(inter_shorts_to_cpx_, 0,throttle_,0);
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DLOG(INFO) << "connected file source to throttle";
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top_block->connect(throttle_, 0, valve_, 0);
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DLOG(INFO) << "connected throttle to valve";
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if (dump_)
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{
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top_block->connect(valve_, 0, sink_, 0);
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DLOG(INFO) << "connected valve to file sink";
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}
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}
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else
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{
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top_block->connect(file_source_, 0, unpack_byte_, 0);
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top_block->connect(unpack_byte_, 0,inter_shorts_to_cpx_,0);
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top_block->connect(inter_shorts_to_cpx_, 0,valve_,0);
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DLOG(INFO) << "connected file source to valve";
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if (dump_)
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{
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top_block->connect(valve_, 0, sink_, 0);
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DLOG(INFO) << "connected valve to file sink";
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}
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}
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}
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else
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{
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if (enable_throttle_control_ == true)
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{
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top_block->connect(file_source_, 0, unpack_byte_, 0);
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top_block->connect(unpack_byte_, 0,inter_shorts_to_cpx_,0);
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top_block->connect(inter_shorts_to_cpx_, 0,throttle_,0);
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DLOG(INFO) << "connected file source to throttle";
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if (dump_)
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{
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top_block->connect(throttle_, 0, sink_, 0);
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DLOG(INFO) << "connected file source to sink";
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}
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}
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else
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{
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if (dump_)
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{
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top_block->connect(file_source_, 0, unpack_byte_, 0);
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top_block->connect(unpack_byte_, 0,inter_shorts_to_cpx_,0);
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top_block->connect(inter_shorts_to_cpx_, 0, sink_, 0);
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DLOG(INFO) << "connected file source to sink";
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}
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}
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}
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}
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void TwoBitCpxFileSignalSource::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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if (enable_throttle_control_ == true)
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{
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top_block->disconnect(file_source_, 0, unpack_byte_, 0);
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DLOG(INFO) << "disconnected file source to unpack_byte_";
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top_block->connect(unpack_byte_, 0,throttle_,0);
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DLOG(INFO) << "disconnected unpack_byte_ to throttle_";
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top_block->disconnect(throttle_, 0, valve_, 0);
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DLOG(INFO) << "disconnected throttle to valve";
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if (dump_)
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{
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top_block->disconnect(valve_, 0, sink_, 0);
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DLOG(INFO) << "disconnected valve to file sink";
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}
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}
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else
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{
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top_block->disconnect(file_source_, 0, unpack_byte_, 0);
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DLOG(INFO) << "disconnected file source to unpack_byte_";
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top_block->disconnect(unpack_byte_, 0, valve_, 0);
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DLOG(INFO) << "disconnected unpack_byte_ to valve";
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if (dump_)
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{
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top_block->disconnect(valve_, 0, sink_, 0);
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DLOG(INFO) << "disconnected valve to file sink";
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}
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}
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}
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else
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{
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if (enable_throttle_control_ == true)
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{
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top_block->disconnect(file_source_, 0, unpack_byte_, 0);
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DLOG(INFO) << "disconnected file source to unpack_byte_";
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top_block->disconnect(unpack_byte_, 0, throttle_, 0);
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DLOG(INFO) << "disconnected unpack_byte_ to throttle";
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if (dump_)
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{
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top_block->disconnect(unpack_byte_, 0, sink_, 0);
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DLOG(INFO) << "disconnected funpack_byte_ to sink";
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}
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}
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else
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{
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if (dump_)
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{
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top_block->disconnect(file_source_, 0, unpack_byte_, 0);
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DLOG(INFO) << "disconnected file source to unpack_byte_";
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top_block->disconnect(unpack_byte_, 0, sink_, 0);
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DLOG(INFO) << "disconnected unpack_byte_ to sink";
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}
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}
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}
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}
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gr::basic_block_sptr TwoBitCpxFileSignalSource::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_block_sptr();
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return gr::blocks::file_source::sptr();
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}
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gr::basic_block_sptr TwoBitCpxFileSignalSource::get_right_block()
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{
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if (samples_ > 0)
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{
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return valve_;
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}
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else
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{
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if (enable_throttle_control_ == true)
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{
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return throttle_;
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}
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else
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{
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return unpack_byte_;
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}
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}
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}
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@@ -0,0 +1,128 @@
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/*!
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* \file nsr_file_signal_source.h
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* \brief Implementation of a class that reads signals samples from a NSR 2 bits sampler front-end file
|
||||
* and adapts it to a SignalSourceInterface. More information about the front-end here
|
||||
* http://www.ifen.com/products/sx-scientific-gnss-solutions/nsr-software-receiver.html
|
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* \author Javier Arribas, 2013 jarribas(at)cttc.es
|
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*
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* This class represents a file signal source.
|
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*
|
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* -------------------------------------------------------------------------
|
||||
*
|
||||
* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
|
||||
*
|
||||
* GNSS-SDR is a software defined Global Navigation
|
||||
* Satellite Systems receiver
|
||||
*
|
||||
* This file is part of GNSS-SDR.
|
||||
*
|
||||
* GNSS-SDR 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 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
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* -------------------------------------------------------------------------
|
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*/
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#ifndef GNSS_SDR_TWO_BIT_CPX_FILE_SIGNAL_SOURCE_H_
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#define GNSS_SDR_TWO_BIT_CPX_FILE_SIGNAL_SOURCE_H_
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#include <string>
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#include <gnuradio/blocks/file_source.h>
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#include <gnuradio/blocks/file_sink.h>
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#include <gnuradio/blocks/throttle.h>
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#include <gnuradio/hier_block2.h>
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#include <gnuradio/msg_queue.h>
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#include <gnuradio/blocks/interleaved_short_to_complex.h>
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#include "gnss_block_interface.h"
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#include "unpack_byte_2bit_cpx_samples.h"
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|
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class ConfigurationInterface;
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|
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/*!
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* \brief Class that reads signals samples from a file
|
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* and adapts it to a SignalSourceInterface
|
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*/
|
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class TwoBitCpxFileSignalSource: public GNSSBlockInterface
|
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{
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public:
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TwoBitCpxFileSignalSource(ConfigurationInterface* configuration, std::string role,
|
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unsigned int in_streams, unsigned int out_streams,
|
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boost::shared_ptr<gr::msg_queue> queue);
|
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virtual ~TwoBitCpxFileSignalSource();
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std::string role()
|
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{
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return role_;
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}
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|
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/*!
|
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* \brief Returns "Two_Bit_Cpx_File_Signal_Source".
|
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*/
|
||||
std::string implementation()
|
||||
{
|
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return "Two_Bit_Cpx_File_Signal_Source";
|
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}
|
||||
size_t item_size()
|
||||
{
|
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return item_size_;
|
||||
}
|
||||
void connect(gr::top_block_sptr top_block);
|
||||
void disconnect(gr::top_block_sptr top_block);
|
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gr::basic_block_sptr get_left_block();
|
||||
gr::basic_block_sptr get_right_block();
|
||||
std::string filename()
|
||||
{
|
||||
return filename_;
|
||||
}
|
||||
std::string item_type()
|
||||
{
|
||||
return item_type_;
|
||||
}
|
||||
bool repeat()
|
||||
{
|
||||
return repeat_;
|
||||
}
|
||||
long sampling_frequency()
|
||||
{
|
||||
return sampling_frequency_;
|
||||
}
|
||||
long samples()
|
||||
{
|
||||
return samples_;
|
||||
}
|
||||
|
||||
private:
|
||||
unsigned long long samples_;
|
||||
long sampling_frequency_;
|
||||
std::string filename_;
|
||||
std::string item_type_;
|
||||
bool repeat_;
|
||||
bool dump_;
|
||||
std::string dump_filename_;
|
||||
std::string role_;
|
||||
unsigned int in_streams_;
|
||||
unsigned int out_streams_;
|
||||
gr::blocks::file_source::sptr file_source_;
|
||||
unpack_byte_2bit_cpx_samples_sptr unpack_byte_;
|
||||
gr::blocks::interleaved_short_to_complex::sptr inter_shorts_to_cpx_;
|
||||
boost::shared_ptr<gr::block> valve_;
|
||||
gr::blocks::file_sink::sptr sink_;
|
||||
gr::blocks::throttle::sptr throttle_;
|
||||
boost::shared_ptr<gr::msg_queue> queue_;
|
||||
size_t item_size_;
|
||||
// Throttle control
|
||||
bool enable_throttle_control_;
|
||||
};
|
||||
|
||||
#endif /*GNSS_SDR_TWO_BIT_CPX_FILE_SIGNAL_SOURCE_H_*/
|
||||
@@ -19,6 +19,7 @@
|
||||
|
||||
set(SIGNAL_SOURCE_GR_BLOCKS_SOURCES
|
||||
unpack_byte_2bit_samples.cc
|
||||
unpack_byte_2bit_cpx_samples.cc
|
||||
unpack_intspir_1bit_samples.cc
|
||||
rtl_tcp_signal_source_c.cc
|
||||
)
|
||||
|
||||
@@ -0,0 +1,88 @@
|
||||
/*!
|
||||
* \file unpack_byte_2bit_cpx_samples.cc
|
||||
*
|
||||
* \brief Unpacks byte samples to NSR 2 bits samples
|
||||
* \author Javier Arribas jarribas (at) cttc.es
|
||||
* -------------------------------------------------------------------------
|
||||
*
|
||||
* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
|
||||
*
|
||||
* GNSS-SDR is a software defined Global Navigation
|
||||
* Satellite Systems receiver
|
||||
*
|
||||
* This file is part of GNSS-SDR.
|
||||
*
|
||||
* GNSS-SDR 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 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
* -------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
|
||||
#include "unpack_byte_2bit_cpx_samples.h"
|
||||
#include <iostream>
|
||||
#include <gnuradio/io_signature.h>
|
||||
|
||||
struct byte_2bit_struct
|
||||
{
|
||||
signed two_bit_sample:2; // <- 2 bits wide only
|
||||
};
|
||||
|
||||
|
||||
unpack_byte_2bit_cpx_samples_sptr make_unpack_byte_2bit_cpx_samples()
|
||||
{
|
||||
return unpack_byte_2bit_cpx_samples_sptr(new unpack_byte_2bit_cpx_samples());
|
||||
}
|
||||
|
||||
unpack_byte_2bit_cpx_samples::unpack_byte_2bit_cpx_samples() : sync_interpolator("unpack_byte_2bit_cpx_samples",
|
||||
gr::io_signature::make(1, 1, sizeof(signed char)),
|
||||
gr::io_signature::make(1, 1, sizeof(short)),
|
||||
4)
|
||||
{}
|
||||
|
||||
unpack_byte_2bit_cpx_samples::~unpack_byte_2bit_cpx_samples()
|
||||
{}
|
||||
|
||||
int unpack_byte_2bit_cpx_samples::work(int noutput_items,
|
||||
gr_vector_const_void_star &input_items,
|
||||
gr_vector_void_star &output_items)
|
||||
{
|
||||
const signed char *in = (const signed char *)input_items[0];
|
||||
short *out = (short*)output_items[0];
|
||||
|
||||
byte_2bit_struct sample;
|
||||
int n = 0;
|
||||
for(int i = 0; i < noutput_items/4; i++)
|
||||
{
|
||||
// Read packed input sample (1 byte = 2 complex samples)
|
||||
//* Packing Order
|
||||
//* Most Significant Nibble - Sample n
|
||||
//* Least Significant Nibble - Sample n+1
|
||||
//* Packing order in Nibble Q1 Q0 I1 I0
|
||||
signed char c = in[i];
|
||||
//Q[n]
|
||||
sample.two_bit_sample = (c>>6) & 3;
|
||||
out[n++] = (short)sample.two_bit_sample;
|
||||
//I[n]
|
||||
sample.two_bit_sample = (c>>4) & 3;
|
||||
out[n++] = (short)sample.two_bit_sample;
|
||||
//Q[n+1]
|
||||
sample.two_bit_sample = (c>>2) & 3;
|
||||
out[n++] = (short)sample.two_bit_sample;
|
||||
//I[n+1]
|
||||
sample.two_bit_sample = c & 3;
|
||||
out[n++] = (short)sample.two_bit_sample;
|
||||
|
||||
}
|
||||
return noutput_items;
|
||||
}
|
||||
@@ -0,0 +1,64 @@
|
||||
/*!
|
||||
* \file unpack_byte_2bit_cpx_samples.h
|
||||
*
|
||||
* \brief Unpacks byte samples to 2 bits complex samples.
|
||||
* Packing Order
|
||||
* Most Significant Nibble - Sample n
|
||||
* Least Significant Nibble - Sample n+1
|
||||
* Packing order in Nibble Q1 Q0 I1 I0
|
||||
* \author Javier Arribas jarribas (at) cttc.es
|
||||
* -------------------------------------------------------------------------
|
||||
*
|
||||
* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
|
||||
*
|
||||
* GNSS-SDR is a software defined Global Navigation
|
||||
* Satellite Systems receiver
|
||||
*
|
||||
* This file is part of GNSS-SDR.
|
||||
*
|
||||
* GNSS-SDR 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 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
* -------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#ifndef GNSS_SDR_UNPACK_BYTE_2BIT_CPX_SAMPLES_H
|
||||
#define GNSS_SDR_UNPACK_BYTE_2BIT_CPX_SAMPLES_H
|
||||
|
||||
#include <gnuradio/sync_interpolator.h>
|
||||
|
||||
class unpack_byte_2bit_cpx_samples;
|
||||
|
||||
typedef boost::shared_ptr<unpack_byte_2bit_cpx_samples> unpack_byte_2bit_cpx_samples_sptr;
|
||||
|
||||
unpack_byte_2bit_cpx_samples_sptr make_unpack_byte_2bit_cpx_samples();
|
||||
|
||||
/*!
|
||||
* \brief This class implements conversion between byte packet samples to 2bit_cpx samples
|
||||
* 1 byte = 2 x complex 2bit I, + 2bit Q samples
|
||||
*/
|
||||
class unpack_byte_2bit_cpx_samples: public gr::sync_interpolator
|
||||
{
|
||||
private:
|
||||
friend unpack_byte_2bit_cpx_samples_sptr
|
||||
make_unpack_byte_2bit_cpx_samples_sptr();
|
||||
|
||||
public:
|
||||
unpack_byte_2bit_cpx_samples();
|
||||
~unpack_byte_2bit_cpx_samples();
|
||||
int work (int noutput_items,
|
||||
gr_vector_const_void_star &input_items,
|
||||
gr_vector_void_star &output_items);
|
||||
};
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user