mirror of https://github.com/gnss-sdr/gnss-sdr
285 lines
11 KiB
C++
285 lines
11 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) 2010-2017 (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 not 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 "spir_gss6450_file_signal_source.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 <cstdio>
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#include <glog/logging.h>
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#include "configuration_interface.h"
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using google::LogMessage;
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SpirGSS6450FileSignalSource::SpirGSS6450FileSignalSource(ConfigurationInterface* configuration,
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std::string role, unsigned int in_streams, unsigned int out_streams, gr::msg_queue::sptr 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_dump_filename = "../data/my_capture_dump.dat";
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item_type_ = "int";
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samples_ = configuration->property(role + ".samples", 0);
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sampling_frequency_ = configuration->property(role + ".sampling_frequency", 0.0);
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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(int);
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long bytes_seek = configuration->property(role + ".bytes_to_skip", 65536);
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double sample_size_byte = static_cast<double>(adc_bits_) / 4.0;
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if(sel_ch_ > n_channels_) { LOG(WARNING) << "Invalid RF channel selection"; }
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if(n_channels_ > 1)
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{
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for(unsigned int i = 0; i < (n_channels_ - 1); i++)
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{
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null_sinks_.push_back(gr::blocks::null_sink::make(item_size_));
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}
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DLOG(INFO)<< "NUMBER OF NULL SINKS = " << null_sinks_.size();
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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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unpack_spir_ = make_unpack_spir_gss6450_samples(adc_bits_);
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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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<< 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(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() << 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::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]" << std::endl;
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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<unsigned long long>(floor(static_cast<double>(static_cast<long>(size) - static_cast<long>(bytes_seek)) / (sample_size_byte * static_cast<double>(n_channels_))));
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samples_ = samples_- static_cast<unsigned long long>(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]" << 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::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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if (endian_swap_)
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{
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endian_ = gr::blocks::endian_swap::make(item_size_);
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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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SpirGSS6450FileSignalSource::~SpirGSS6450FileSignalSource()
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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_ ,0);
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top_block->connect(endian_, 0, unpack_spir_, 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_, 0);
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}
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if(n_channels_ > 1)
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{
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unsigned int aux = 0;
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for(unsigned int 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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top_block->connect(deint_, i, null_sinks_.at(aux), 0);
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aux++;
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}
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}
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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_, 0, throttle_, 0);
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top_block->connect(throttle_, 0, valve_, 0);
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}
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else
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{
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top_block->connect(unpack_spir_, 0, valve_, 0);
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}
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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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}
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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_ ,0);
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top_block->disconnect(endian_, 0, unpack_spir_, 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_, 0);
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}
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if(n_channels_ > 1)
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{
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unsigned int aux = 0;
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for(unsigned int 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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top_block->disconnect(deint_, i, null_sinks_.at(aux), 0);
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aux++;
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}
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}
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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_, 0, throttle_, 0);
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top_block->disconnect(throttle_, 0, valve_, 0);
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}
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else
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{
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top_block->disconnect(unpack_spir_, 0, valve_, 0);
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}
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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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}
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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()
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{
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if(samples_ > 0) { return valve_; }
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else
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{
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if(enable_throttle_control_) { return throttle_; }
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else { return unpack_spir_; }
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}
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}
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