Auto Grant access to Mic and Camera with Qt WebEngine

Question

I am building a home security system with RPi and WebRTC. I simply need a way to trigger a browser to open at a given URL and to auto-grant access to the Microphone and Camera. I had hoped to use the WebEngine library with PyQt but WebEngine is not supported in PyQt for RPi. So I am trying Qt itself now. Unfortunately I am not familiar with C++, so i am struggling.

The example here has 90% of what I need. The code is replicated below. I just need to tweak it to grant access to the mic and camera when it is requested. I am hoping someone can assist me with this?

#include <QApplication>
#include <QWebEngineView>

QUrl commandLineUrlArgument()
{
    const QStringList args = QCoreApplication::arguments();
    for (const QString &arg : args.mid(1)) {
        if (!arg.startsWith(QLatin1Char('-')))
            return QUrl::fromUserInput(arg);
    }
    return QUrl(QStringLiteral("https://www.qt.io"));
}


int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QApplication app(argc, argv);
    QWebEngineView view;
    view.setUrl(commandLineUrlArgument());
    view.resize(1024, 750);
    view.show();

    return app.exec();
}

Answer 1

I answered this question but for PyQt5: Grant access to Cam & Mic using Python for PyQt WebEngine, I will only do a C ++ translation to Python, the base is the same.

#include <QApplication>
#include <QUrl>
#include <QWebEngineView>

class WebEnginePage: public QWebEnginePage{
    Q_OBJECT
public:
    WebEnginePage(QObject *parent = Q_NULLPTR):QWebEnginePage(parent){
        connect(this, &WebEnginePage::featurePermissionRequested, this, &WebEnginePage::onFeaturePermissionRequested);
    }
private Q_SLOTS:
    void onFeaturePermissionRequested(const QUrl &securityOrigin, QWebEnginePage::Feature feature){

        if(feature  == QWebEnginePage::MediaAudioCapture
                || feature == QWebEnginePage::MediaVideoCapture
                || feature == QWebEnginePage::MediaAudioVideoCapture)
            setFeaturePermission(securityOrigin, feature, QWebEnginePage::PermissionGrantedByUser);
        else
            setFeaturePermission(securityOrigin, feature, QWebEnginePage::PermissionDeniedByUser);
    }
};

QUrl commandLineUrlArgument()
{
    const QStringList args = QCoreApplication::arguments();
    for (const QString &arg : args.mid(1)) {
        if (!arg.startsWith(QLatin1Char('-')))
            return QUrl::fromUserInput(arg);
    }
    return QUrl(QStringLiteral("https://www.qt.io"));
}


int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QApplication app(argc, argv);
    QWebEngineView view;
    view.setPage(new WebEnginePage);
    view.setUrl(commandLineUrlArgument());
    view.resize(1024, 750);
    view.show();

    return app.exec();
}

#include "main.moc"