Meego 1.2 Harmattan and QCamera application

Question

Is there any way to work with camera with QCamera class in Nokia N9 (Meego 1.2 Harmattan) or I should use another one?

Here's my problem: simple application that works fine on Nokia C6-01 (Symbian Anna) doesn't do anything useful on N9.

Here're code snipets:

testmobile.pro

<...>
CONFIG += mobility
MOBILITY += multimedia
LIBS += -lQtMultimediaKit
<...>

mainwindow.h

class MainWindow : public QWidget
{
    Q_OBJECT
    <...>
    private:
        QCamera* camera_;
        QGraphicsView *view;
        QGraphicsVideoItem *videoItem;
        QGraphicsScene *scene;
    <...>
}

mainwindow.cpp

MainWindow::MainWindow(QWidget *parent)
: QWidget(parent)
{
<...>
    camera_ = new QCamera;
    view = new QGraphicsView(this);
    scene = new QGraphicsScene(view);
    videoItem = new QGraphicsVideoItem;
    view->setScene(scene);
    scene->addItem(videoItem);

    QVBoxLayout *lay = new QVBoxLayout(this);
    lay->addWidget(view);
    this->setLayout(lay);
    view->show();
    camera_->setViewfinder(videoItem);

    camera_->start();
}

<...>

So after MainWindow object is constructed and shown we'll se a simple viewfinder on Nokia C6-01 and black screen on Nokia N9.

Any ideas?

art-o-nawa art-o-nawa · Accepted Answer · 2011-09-05T06:52:06

I found solution! It was security problem. As I found - Meego has analogue of "capabilities" of Symbian. It's called AEGIS security tokens. So, to request a permission to work with camera (or any other) you should add your_application_name.agis file into the "qtc_packaging/debian_harmattan" folder of your project. In my case this file consisted of:

<aegis>
    <request>
        <credential name="GRP::video"/>
        <credential name="GRP::pulse-access"/>
        <for path="/opt/testmobile/bin/testmobile"/>
   </request>
</aegis>

So permissons are defined in the "name" property of "credential" tag and "for path" tag defines package to perform these permissions with.

More information can be found here

Meego 1.2 Harmattan and QCamera application

1 Answers