[Interest] QtConcurrent::run with lambdas

[Jason H]

I wish to achieve the following scenario in a QAbstractVideoSurface derived 
class called FrameHandler:
class FrameInfo {
public:
        unsigned int frameNumber;
        std::function<void(const FrameInfo &info)> frameFunction; // not sure 
this is right
        QImage image;
};

class FrameHandler: public QAbstractVideoSurface {
        std::function<void(const FrameInfo &info)> frameFunction;
        FrameInfo *_currentFrameInfo;
        FrameHandler(std::function<void(const FrameInfo &info)> func, QObject 
*parent = NULL);
...
};

bool FrameHandler::present(const QVideoFrame &frame) {


        frameInfo = new FrameInfo;
        frameInfo->frameFunction = frameFunction;
        frameInfo->frameNumber = frameCount;

        if (frame.pixelFormat() == QVideoFrame::Format_ARGB32) {
                QVideoFrame     frame2 = frame;
                QSize size = frame2.size();
                int bytes = frame.size().width() * frame.size().height() * 4; 
// 4=ARGB

                frameInfo->image = QImage(size, QImage::Format_ARGB32);
                frame2.map(QAbstractVideoBuffer::ReadOnly);
                memcpy(_currentFrameInfo->image.bits(), frame2.bits(), bytes); 
// takes about 1280x720 takes ~750 usec on a MBP
                frame2.unmap();

                QFuture<void> future = QtConcurrent::run(frameFunction, 
frameInfo); // I can't find any way to pass these to work
//              QFuture<void> future = QtConcurrent::run(frameInfo, 
&FrameInfo::frameFunction); 
//              QFuture<void> future = QtConcurrent::run(frameFunction, 
frameInfo);
                QFuture<void> future = QtConcurrent::run(frameFunction, 
frameInfo);     
        }
}


// else where in the application (main.cpp) I'd like to do
FrameHandler saver([] {
        QString filename = QString("test_%1.png").arg(info.frameNumber);
        info.image(filename); // will run on another core because of 
QtConcurrent::run(), takes about 600ms due to PNG compression
});


How can I do this?
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