cxLayoutVideoSource.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

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modification, are permitted provided that the following conditions are met:

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   this list of conditions and the following disclaimer.

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   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

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   may be used to endorse or promote products derived from this software
   without specific prior written permission.

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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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#include "cxLayoutVideoSource.h"
#include "cxViewCollectionImageWriter.h"
#include "cxViewCollectionWidget.h"
#include "vtkImageData.h"
#include "cxLogger.h"

namespace cx
{

LayoutVideoSource::LayoutVideoSource(ViewCollectionWidget* widget) :
    mWidget(widget),
    mStreaming(false)
{
        CX_ASSERT(widget);
    connect(mWidget.data(), &ViewCollectionWidget::rendered, this, &LayoutVideoSource::onRendered);
}

QString LayoutVideoSource::getUid()
{
    return QString("LayoutVideoSource%1").arg(reinterpret_cast<long>(this));
}

QString LayoutVideoSource::getName()
{
    return QString("LayoutVideoSource");
}

double LayoutVideoSource::getTimestamp()
{
    return mTimestamp.toMSecsSinceEpoch();
}

void LayoutVideoSource::start()
{
    if (mStreaming)
        return;

    mStreaming = true;
    emit streaming(mStreaming);
}

void LayoutVideoSource::stop()
{
    if (!mStreaming)
        return;

    mGrabbed = vtkImageDataPtr();
    mStreaming = false;
    emit streaming(mStreaming);
}

bool LayoutVideoSource::validData() const
{
    return mStreaming;
}

bool LayoutVideoSource::isConnected() const
{
    return true;
}

bool LayoutVideoSource::isStreaming() const
{
    return mStreaming;
}

void LayoutVideoSource::onRendered()
{
    if (!mStreaming)
        return;

    mGrabbed = vtkImageDataPtr();
    mTimestamp = QDateTime::currentDateTime();
    emit newFrame();
}

vtkImageDataPtr LayoutVideoSource::getVtkImageData()
{
    if (!mStreaming)
        return vtkImageDataPtr();

    if (!mGrabbed)
    {
        ViewCollectionImageWriter grabber(mWidget);
        mGrabbed = grabber.grab();
    }
    return mGrabbed;
}

} // namespace cx