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.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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();
}

TimeInfo LayoutVideoSource::getAdvancedTimeInfo()
{
        return TimeInfo(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