uwgainfromdb.cpp

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//
// Copyright (c) 2017 Regents of the SIGNET lab, University of Padova.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. Neither the name of the University of Padova (SIGNET lab) nor the
//    names of its contributors may be used to endorse or promote products
//    derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
 
#include "uwgainfromdb.h"
#include "uwip-module.h"
 
 
 
static class UnderwaterGainFromDbClass : public TclClass
{
public:
    UnderwaterGainFromDbClass()
        : TclClass("Module/UW/GAINFROMDB")
    {
    }
    TclObject *
    create(int, const char *const *)
    {
        return (new UnderwaterGainFromDb);
    }
} class_UnderwaterGainFromDb;
 
UnderwaterGainFromDb::UnderwaterGainFromDb()
    : time_roughness_(1)
    , depth_roughness_(1)
    , distance_roughness_(1)
    , total_time_(1)
    , frequency_correction_factor_(1)
{
    bind("time_roughness_", &time_roughness_);
    bind("depth_roughness_", &depth_roughness_);
    bind("distance_roughness_", &distance_roughness_);
    bind("total_time_", &total_time_);
    bind("frequency_correction_factor_", &frequency_correction_factor_);
    bind_error("token_separator_", &token_separator_);
    token_separator_ = '\t';
    path_ = "";
}
 
int
UnderwaterGainFromDb::command(int argc, const char *const *argv)
{
    if (argc == 3) {
        if (strcasecmp(argv[1], "path") == 0) {
            string tmp_ = ((char *) argv[2]);
            path_ = new char[tmp_.length() + 1];
            strcpy(path_, tmp_.c_str());
            if (path_ == NULL) {
                fprintf(stderr, "Empty string for the path_ file name");
                return TCL_ERROR;
            }
            return TCL_OK;
        }
    }
    return UnderwaterPhysical::command(argc, argv);
} /* UnderwaterGainFromDb::command */
 
double
UnderwaterGainFromDb::getPER(double _snr, int _nbits, Packet *p)
{
    hdr_MPhy *ph = HDR_MPHY(p);
 
    double x_ = (ph->srcPosition)->getX();
    double y_ = (ph->srcPosition)->getY();
    double z_ = (ph->srcPosition)->getZ();
    double x_dst_ = (ph->dstPosition)->getX();
    double y_dst_ = (ph->dstPosition)->getY();
    double z_dst_ = (ph->dstPosition)->getZ();
    double depth_src_ = z_;
    double depth_dst_ = z_dst_;
    double dist_dst_ =
            sqrt((x_ - x_dst_) * (x_ - x_dst_) + (y_ - y_dst_) * (y_ - y_dst_));
 
    double gain_ = pow(
            10, (this->getGain(NOW, depth_src_, depth_dst_, dist_dst_) / 10));
    gain_ = gain_ * pow(frequency_correction_factor_, -dist_dst_);
 
    double snir_;
    if ((ph->Pn + ph->Pi) != 0) {
        snir_ = (ph->Pt * gain_) / (ph->Pn + ph->Pi);
    } else {
        snir_ = -INT_MAX;
        cerr << "ph->Pn + ph->Pi = 0!" << endl;
    }
    return UnderwaterPhysical::getPER(snir_, _nbits, p);
} /* UnderwaterGainFromDb::getPER */
 
void
UnderwaterGainFromDb::setTimeRoughness(const int &_time)
{
    assert(_time >= 0);
    time_roughness_ = _time;
    return;
} /* UnderwaterGainFromDb::setTimeRoughness */
 
void
UnderwaterGainFromDb::setDepthRoughness(const int &_depth)
{
    assert(_depth >= 0);
    depth_roughness_ = _depth;
    return;
} /* UnderwaterGainFromDb::setDepthRoughness */
 
void
UnderwaterGainFromDb::setDistanceRoughness(const int &_distance)
{
    assert(_distance >= 0);
    distance_roughness_ = _distance;
    return;
} /* UnderwaterGainFromDb::setDistanceRoughness */
 
void
UnderwaterGainFromDb::setTotalTime(const int &_total_time)
{
    assert(_total_time > 0);
    total_time_ = _total_time;
    return;
} /* UnderwaterGainFromDb::setTotalTime */
 
void
UnderwaterGainFromDb::setFrequencyCorrectionFactor(
        const double &_frequency_correction_factor)
{
    assert(_frequency_correction_factor > 0);
    frequency_correction_factor_ = _frequency_correction_factor;
    return;
} /* UnderwaterGainFromDb::setFrequencyCorrectionFactor */
 
double
UnderwaterGainFromDb::getGain(const double &_time, const double &_source_depth,
        const double &_destination_depth, const double &_destination_distance)
{
    assert(_time >= 0);
    assert(_source_depth <= 0);
    assert(_destination_depth <= 0);
    assert(_destination_distance >= 0);
 
    int time_filename_ = (int) ((int) ceil(_time) / ((int) time_roughness_) *
            (int) time_roughness_ % (int) total_time_);
    int source_depth_filename_ = (int) ((int) ceil(_source_depth * -1) /
            (int) depth_roughness_ * (int) depth_roughness_);
    if (source_depth_filename_ == 0)
        source_depth_filename_ = depth_roughness_;
    string file_name =
            this->createNameFile(time_filename_, source_depth_filename_);
 
    int line_index_ = (int) ((int) ceil(_destination_depth * -1) /
            (int) depth_roughness_);
    int column_index_ = (int) ((int) ceil(_destination_distance) /
            (int) distance_roughness_);
    double gain_ =
            this->retriveGainFromFile(file_name, line_index_, column_index_);
 
    return gain_;
} /* UnderwaterGainFromDb::getSnr */
 
double
UnderwaterGainFromDb::retriveGainFromFile(const string &_file_name,
        const int &_row_index, const int &_column_index) const
{
    int row_iterator_ = 0;
    int column_iterator_ = 0;
    ifstream input_file_;
    istringstream stm;
    string line_;
    string token_;
    string value_;
    double return_value_;
 
    char *tmp_ = new char[_file_name.length() + 1];
    strcpy(tmp_, _file_name.c_str());
    if (tmp_ == NULL) {
        fprintf(stderr, "Empty string for the file name");
    }
 
    input_file_.open(tmp_);
    if (input_file_.is_open()) {
        while (std::getline(input_file_, line_)) {
            row_iterator_++;
            if (row_iterator_ == _row_index) {
                break;
            }
        }
    } else {
        cerr << "Impossible to open file " << _file_name << endl;
    }
 
    istringstream iss(line_);
    while (getline(iss, token_, token_separator_)) {
        column_iterator_++;
        if (column_iterator_ == _column_index) {
            value_ = token_;
        }
    }
 
    stm.str(value_);
    stm >> return_value_;
    //    cout << "file:" << _file_name << ":column:" << _column_index <<
    //    ":row:" << _row_index << ":gain:" << return_value_ << endl;
 
    delete[] tmp_;
    if (this->isZero(return_value_)) {
        return (-INT_MAX);
    } else {
        return return_value_;
    }
} /* UnderwaterGainFromDb::retriveSnrFromFile */
 
string
UnderwaterGainFromDb::createNameFile(const int &_time, const int &_source_depth)
{
    osstream_.clear();
    osstream_.str("");
    osstream_ << path_ << "/" << _time << "_" << _source_depth << ".txt";
    return osstream_.str();
} /* UnderwaterGainFromDb::createNameFile */