polytope.cpp

/*
   MIT License

   libahp_xc library to drive the AHP XC correlators
   Copyright (C) 2020  Ilia Platone

   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   copies of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in all
   copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   SOFTWARE.
*/

#include <cstdio>
#include <cstring>
#include "polytope.h"
#include "line.h"
#include "graph.h"
#include "mainwindow.h"

Polytope::Polytope(QString n, int index, QList<Line *>nodes, QSettings *s, QWidget *parent) :
    QWidget(parent)
{
    setAccessibleName("Polytope");
    settings = s;
    name = n;
    Index = index;
    Nodes = nodes;
    localpercent = 0;
    localstop = 1;
    mode = Counter;
    start = (int*)malloc(sizeof(int));
    end = (int*)malloc(sizeof(int));
    step = (int*)malloc(sizeof(int));
    size = (int*)malloc(sizeof(int));
    lag_start = (double*)malloc(sizeof(double));
    lag_end = (double*)malloc(sizeof(double));
    lag_step = (double*)malloc(sizeof(double));
    lag_size = (double*)malloc(sizeof(double));
    spectrum = new Series();
    counts = new Series();
    resetPercentPtr();
    resetStopPtr();
    stream = dsp_stream_new();
    dsp_stream_add_dim(stream, 1);
    dsp_stream_alloc_buffer(stream, stream->len);
    stream->samplerate = 1.0/ahp_xc_get_packettime();
    connect(getSpectrum()->getElemental(), static_cast<void (Elemental::*)(bool, double, double)>(&Elemental::scanFinished), this, &Polytope::plot);
}

void Polytope::setBufferSizes()
{
    lock();
    len = 1;
    size_2nd = 1;
    lag_size_2nd = 1;
    for(int x = 0; x < getCorrelationOrder(); x++) {
        start[x] = getLine(x)->getStartChannel();
        end[x] = getLine(x)->getEndChannel();
        step[x] = getLine(x)->getScanStep();
        size[x] = getLine(x)->getChannelBandwidth();
        size_2nd *= getLine(x)->getChannelBandwidth() / getLine(x)->getScanStep();
        lag_start[x] = getLine(x)->getStartLag();
        lag_end[x] = getLine(x)->getEndLag();
        lag_step[x] = getLine(x)->getLagStep();
        lag_size[x] = getLine(x)->getLagBandwidth();
        lag_size_2nd *= getLine(x)->getLagBandwidth() / getLine(x)->getLagStep();
    }
    setSpectrumSize(size_2nd);
    unlock();
}

bool Polytope::haveSetting(QString setting)
{
    return settings->contains(QString(name + "_" + setting).replace(' ', ""));
}

void Polytope::removeSetting(QString setting)
{
    settings->remove(QString(name + "_" + setting).replace(' ', ""));
}

void Polytope::saveSetting(QString setting, QVariant value)
{
    settings->setValue(QString(name + "_" + setting).replace(' ', ""), value);
    settings->sync();
}

QVariant Polytope::readSetting(QString setting, QVariant defaultValue)
{
    return settings->value(QString(name + "_" + setting).replace(' ', ""), defaultValue);
}

void Polytope::setDelay(double s)
{
    if(ahp_xc_has_crosscorrelator()) {
        for(int x = 0; x < getCorrelationOrder(); x++) {
            ahp_xc_set_channel_cross((uint32_t)getLine(x)->getLineIndex(), (off_t)fmax(0, s * ahp_xc_get_frequency()), 1, 0);
        }
    }
}

void Polytope::setMode(Mode m)
{
    mode = m;
    getDark()->clear();
    getCounts()->clear();
    getSpectrum()->clear();
    if(mode == CrosscorrelatorIQ || mode == CrosscorrelatorII)
    {
        for(int x = 0; x < getLines().count(); x++) {
            connect(getLine(x), static_cast<void (Line::*)()>(&Line::savePlot), this, &Polytope::SavePlot);
            connect(getLine(x), static_cast<void (Line::*)(Line*)>(&Line::takeDark), this, &Polytope::TakeDark);
        }
        setCorrelationOrder(getCorrelationOrder());
    }
    else
    {
        *stop = 1;
        for(int x = 0; x < getLines().count(); x++) {
            disconnect(getLine(x), static_cast<void (Line::*)()>(&Line::savePlot), this, &Polytope::SavePlot);
            disconnect(getLine(x), static_cast<void (Line::*)(Line*)>(&Line::takeDark), this, &Polytope::TakeDark);
        }
        setCorrelationOrder(getCorrelationOrder());
    }
}

void Polytope::addCount(double starttime, ahp_xc_packet *packet)
{
    if(packet == nullptr)
        packet = getPacket();
    bool active = false;
    switch(getMode()) {
    default: break;
    case HolographIQ:
    case HolographII:
        if(getVLBIContext() == nullptr) break;
        if(scanActive())
        {
            dsp_stream_p stream = getStream();
            if(stream == nullptr) break;
            if(MainWindow::lock_vlbi()) {
                double offset = 0;
                for(int x = 0; x < getCorrelationOrder(); x++) {
                    if(vlbi_has_node(getVLBIContext(), getLine(x)->getName().toStdString().c_str())) {
                        offset = vlbi_get_offset(getVLBIContext(), packet->timestamp + starttime, getLine(x)->getName().toStdString().c_str(),
                                         getGraph()->getRa(), getGraph()->getDec(), getGraph()->getDistance());
                        offset /= ahp_xc_get_sampletime();
                        offset ++;
                        if(ahp_xc_intensity_crosscorrelator_enabled())
                        {
                            ahp_xc_set_channel_auto(getLine(x)->getLineIndex(), offset, 1, 0);
                        } else {
                            ahp_xc_set_channel_cross(getLine(x)->getLineIndex(), offset, 1, 0);
                        }
                    }
                }
                stream->dft.complex[0].real = packet->crosscorrelations[Index].correlations[ahp_xc_get_crosscorrelator_lagsize() / 2].real;
                stream->dft.complex[0].imaginary = packet->crosscorrelations[Index].correlations[ahp_xc_get_crosscorrelator_lagsize() / 2].imaginary;
                MainWindow::unlock_vlbi();
            }
        }
        break;
    case Counter:
        if(isActive())
        {
            int index = ahp_xc_get_crosscorrelation_index(indexes.toVector().toStdVector().data(), indexes.count());
            active = index == Index;
            bool showhistogram = true;
            for(int x = 0; x < getCorrelationOrder(); x++) {
                if(!getLine(x)->showCrosscorrelations())
                    active &= false;
                if(!getLine(x)->showCorrelationsHistogram())
                    showhistogram &= false;
            }
            if(active) {
                double mag = -1.0;
                double phi = -1.0;
                if(ahp_xc_intensity_crosscorrelator_enabled()) {
                    mag = 0.0;
                    phi = 0.0;
                    double cr = 0;
                    double ci = 0;
                    for(int x = 0; x < getCorrelationOrder(); x++) {
                        double rad_p = (phi+packet->autocorrelations[getLine(x)->getLineIndex()].correlations[0].phase)/2.0;
                        double rad_m = (phi-packet->autocorrelations[getLine(x)->getLineIndex()].correlations[0].phase)/2.0;
                        mag += packet->autocorrelations[getLine(x)->getLineIndex()].correlations[0].magnitude;
                        cr = 2*sin(rad_p)*cos(rad_m);
                        ci = 2*cos(rad_p)*cos(rad_m);
                    }
                    mag /= getCorrelationOrder();
                    phi = asin(cr);
                    if(ci < 0) phi += M_PI;
                    cr *= mag;
                    ci *= mag;
                    mag = sqrt(pow(cr, 2)+pow(ci, 2));
                } else {
                    mag = (double)packet->crosscorrelations[Index].correlations[0].magnitude;
                    phi = (double)packet->crosscorrelations[Index].correlations[0].phase;
                }
                getCounts()->getElemental()->setStreamSize(getCounts()->getSeries()->count()+1);
                getCounts()->addCount(packet->timestamp + starttime - getTimeRange(), packet->timestamp + starttime, -1.0, mag, phi);
                if(showhistogram) {
                    getCounts()->buildHistogram(getCounts()->getMagnitude(), getCounts()->getElemental()->getStream()->magnitude, 100, getCounts()->getHistogramStackIndexMagnitude(), getCounts()->getHistogramStackMagnitude(), getCounts()->getHistogramMagnitude());
                }
            }
            else
            {
                getCounts()->clear();
            }
        }
        break;
    }
}

void Polytope::setCorrelationOrder(int order)
{
    while(!MainWindow::lock_vlbi());
    correlation_order = fmax(order, 2);
    start = (int*)realloc(start, sizeof(int) * correlation_order);
    end = (int*)realloc(end, sizeof(int) * correlation_order);
    step = (int*)realloc(step, sizeof(int) * correlation_order);
    size = (int*)realloc(size, sizeof(int) * correlation_order);
    lag_start = (double*)realloc(lag_start, sizeof(double) * correlation_order);
    lag_end = (double*)realloc(lag_end, sizeof(double) * correlation_order);
    lag_step = (double*)realloc(lag_step, sizeof(double) * correlation_order);
    lag_size = (double*)realloc(lag_size, sizeof(double) * correlation_order);
    lines.clear();
    indexes.clear();
    for(int x = 0; x < correlation_order; x++) {
        int idx = ahp_xc_get_line_index(Index, x);
        lines.append(Nodes.at(idx));
        indexes.append(idx);
    }
    const char** names = (const char**)malloc(sizeof(const char*)*getCorrelationOrder());
    for(int x = 0; x < getCorrelationOrder(); x++)
        names[x] = getLine(x)->getName().toStdString().c_str();
    if(getMode() == HolographII || getMode() == HolographIQ)
        vlbi_set_baseline_stream(getVLBIContext(), names, getStream());
    free(names);
    lines.clear();
    indexes.clear();
    for(int x = 0; x < getCorrelationOrder(); x++) {
        int idx = ahp_xc_get_line_index(Index, x);
        lines.append(Nodes[idx]);
        indexes.append(idx);
        connect(getLine(x), static_cast<void (Line::*)()>(&Line::clear),
                [ = ]()
        {
            getCounts()->clear();
            getSpectrum()->clear();
        });
        connect(getLine(x), static_cast<void (Line::*)(Line*)>(&Line::activeStateChanged),
                [ = ](Line * line)
        {
            getCounts()->clear();
            bool newstate = line->showCrosscorrelations();
            *stop = !line->isActive();
            for(int y = 0; y < getLines().count(); y++) {
                if(y == x) continue;
                line = getLine(y);
                newstate &= line->showCrosscorrelations();
                if(line != nullptr)
                *stop = (*stop || !line->isRunning());
            }
            if(oldstate != newstate)
            {
                emit activeStateChanging(this);
                if(newstate)
                {
                    emit activeStateChanged(this);
                }
            }
            running = newstate;
            oldstate = newstate;
        });
        getLine(x)->setActive(getLine(x)->isActive());
        if(mode == CrosscorrelatorIQ || mode == CrosscorrelatorII)
            connect(getLine(x), static_cast<void (Line::*)()>(&Line::updateBufferSizes), this, &Polytope::setBufferSizes);
        else
            disconnect(getLine(x), static_cast<void (Line::*)()>(&Line::updateBufferSizes), this, &Polytope::setBufferSizes);
    }
    MainWindow::unlock_vlbi();
}

void Polytope::addToVLBIContext(int index)
{
    if(index < 0)
    {
        index = getMode() - HolographIQ;
        if(index < 0) return;
    }
}

void Polytope::removeFromVLBIContext(int index)
{
    if(index < 0)
    {
        index = getMode() - HolographIQ;
        if (index < 0) return;
    }
    const char** names = (const char**)malloc(sizeof(const char*)*getCorrelationOrder());
    for(int x = 0; x < getCorrelationOrder(); x++)
        names[x] = getLine(x)->getName().toStdString().c_str();
    vlbi_unlock_baseline(getVLBIContext(), names);
}

bool Polytope::isActive(bool atleast1)
{
    bool active = true;
    for(int x = 0; x < getLines().count(); x++)
        active |= getLine(x)->isActive();
    if(atleast1)
        return active;
    return running;
}

bool Polytope::scanActive(bool atleast1)
{
    if(getLines().count() == 0)
        return false;
    bool active = getLine(0)->scanActive();
    for(int x = 1; x < getCorrelationOrder(); x++) {
        if(atleast1)
            active |= getLine(x)->scanActive();
        else
            active &= getLine(x)->scanActive();
    }
    return active;
}

void Polytope::TakeMeanValue(Line *sender)
{
    if(sender->DarkTaken())
    {
        MinValue = 0;
    } else {
        double min = DBL_MAX;
        for(int d = 0; d < getCounts()->getMagnitude()->count(); d++)
        {
            min = fmin(min, getCounts()->getMagnitude()->at(d).y());
        }
        MinValue = min;
    }
}

void Polytope::TakeDark(Line* sender)
{
    if(sender->DarkTaken())
    {
        getDark()->clear();
        for(int x = 0; x < getSpectrum()->count(); x++)
        {
            getDark()->insert(getSpectrum()->getMagnitude()->at(x).x(), getSpectrum()->getMagnitude()->at(x).y());
            QString darkstring = readString("Dark", "");
            if(!darkstring.isEmpty())
                saveSetting("Dark", darkstring + ";");
            darkstring = readString("Dark", "");
            saveSetting("Dark", darkstring + QString::number(getSpectrum()->getMagnitude()->at(x).x()) + "," + QString::number(getSpectrum()->getMagnitude()->at(
                            x).y()));
        }
        getSpectrum()->setName(name + " magnitude (residuals)");
    }
    else
    {
        removeSetting("Dark");
        getDark()->clear();
        getSpectrum()->setName(name + " magnitude");
    }
}

void Polytope::SavePlot()
{
    if(!isActive())
        return;
    QString filename = QFileDialog::getSaveFileName(this, "DialogTitle", "filename.csv",
                       "CSV files (.csv);;Zip files (.zip, *.7z)", 0, 0); // getting the filename (full path)
    QFile data(filename);
    if(data.open(QFile::WriteOnly | QFile::Truncate))
    {
        QTextStream output(&data);
        output << "'lag (ns)';'magnitude';'phase'\n";
        for(int x = 0, y = 0; x < getSpectrum()->count(); y++, x++)
        {
            output << "'" + QString::number(getSpectrum()->getMagnitude()->at(y).x()) + "';'" + QString::number(getSpectrum()->getMagnitude()->at(y).y()) + "';'"
                   + QString::number(getSpectrum()->getPhase()->at(y).x()) + "';'" + QString::number(getSpectrum()->getPhase()->at(y).y()) + "'\n";
        }
    }
    data.close();
}

bool Polytope::idft() {
    bool dft = getLine(0)->idft();
    for(int x = 0; x < getCorrelationOrder(); x++)
        dft &= getLine(x)->idft();
    return dft;
}

int Polytope::smooth()
{
    int value = INT32_MAX;
    for(int x = 0; x < getCorrelationOrder(); x++)
        value = fmin(getLine(x)->smooth(), value);
    return value;
}

QMap<double, double>* Polytope::getDark()
{
    return getCounts()->getDark();
}

void Polytope::stackCorrelations()
{
    scanning = true;
    ahp_xc_sample *spectrum = nullptr;
    *stop = 0;
    int npackets = 0;
    setBufferSizes();
    QList<ahp_xc_scan_request> requests;
    for(Line* line : getLines()) {
        requests.append((ahp_xc_scan_request) {
                .index = line->getLineIndex(),
                .start = (off_t)line->getStartChannel(),
                .len = (size_t)line->getChannelBandwidth(),
                .step = (size_t)line->getScanStep()
            }
        );
        line->setPercentPtr(percent);
        line->resetStopPtr();
        line->setLocation();
    }
    npackets = ahp_xc_scan_crosscorrelations(requests.toVector().data(), requests.length(), &spectrum, stop, percent);
    if(spectrum != nullptr && npackets > 0)
    {
        setSpectrumSize(npackets);
        getSpectrum()->getElemental()->set(0);
        for (int x = 0, z = 0; z < npackets && x < npackets; x++, z++)
        {
            ahp_xc_correlation correlation;
            memcpy(&correlation, &spectrum[z].correlations[0], sizeof(ahp_xc_correlation));
            for(int o = 0; o < getCorrelationOrder(); o++) {
                int lag = correlation.lags[o] * ahp_xc_get_sampletime();
                if(lag < npackets && lag >= 0)
                {
                    if(getSpectrum()->getElemental()->getMagnitude()[lag] == 0) getSpectrum()->getElemental()->getMagnitude()[lag] = 1.0;
                    getSpectrum()->getElemental()->getMagnitude()[lag] *= (double)pow(correlation.magnitude * M_PI * 2, 1.0/getCorrelationOrder());
                    getSpectrum()->getElemental()->getPhase()[lag] = fmod(getSpectrum()->getElemental()->getPhase()[lag] + (double)correlation.phase, M_PI * 2);

                }
            }
        }
        bool idft = true;
        bool align = true;
        for(Line *line : getLines()) {
            idft &= line->idft();
            align &= line->Align();
        }
        if(idft)
            getSpectrum()->getElemental()->idft();
        if(align)
            getSpectrum()->getElemental()->run();
        else
            getSpectrum()->getElemental()->finish(false, getStartLag(), getLagStep());
        free(spectrum);
    }
    for(Line* line : getLines()) {
        line->resetPercentPtr();
        line->resetStopPtr();
    }
    scanning = false;
}

void Polytope::plot(bool success, double o, double s)
{
    double timespan = s;
    if(success)
        timespan = s;
    double x_offset = o;
    double y_offset = 0;
    getSpectrum()->reset();
    if(!idft()) {
        getSpectrum()->stackBuffer(getSpectrum()->getMagnitude(), getSpectrum()->getMagnitudeStack(), getSpectrum()->getElemental()->getMagnitude(), 0, getSpectrum()->getElemental()->getStreamSize(), timespan, x_offset, 1.0, y_offset);
        getSpectrum()->stackBuffer(getSpectrum()->getPhase(), getSpectrum()->getPhaseStack(), getSpectrum()->getElemental()->getPhase(), 0, getSpectrum()->getElemental()->getStreamSize(), timespan, x_offset, 1.0, y_offset);
    } else
        getSpectrum()->stackBuffer(getSpectrum()->getMagnitude(), getSpectrum()->getStack(), getSpectrum()->getElemental()->getBuffer(), 0, getSpectrum()->getElemental()->getStreamSize(), timespan, x_offset, 1.0, y_offset);
    getSpectrum()->buildHistogram(getSpectrum()->getMagnitude(), getSpectrum()->getElemental()->getStream()->magnitude, 100, getSpectrum()->getHistogramStackIndexMagnitude(), getSpectrum()->getHistogramStackMagnitude(), getSpectrum()->getHistogramMagnitude());
    getSpectrum()->buildHistogram(getSpectrum()->getPhase(), getSpectrum()->getElemental()->getStream()->phase, 100, getSpectrum()->getHistogramStackIndexPhase(), getSpectrum()->getHistogramStackPhase(), getSpectrum()->getHistogramPhase());
    getGraph()->paint3d();
    gethistogram()->paint();
}

Polytope::~Polytope()
{
    threadRunning = false;
}