#include <QmitkVideoBackground.h>

Collaboration diagram for QmitkVideoBackground:

Public Slots
void	UpdateVideo ()
Signals
void	NewFrameAvailable (mitk::VideoSource *)
Public Member Functions
	QmitkVideoBackground (mitk::VideoSource *v, int TimerDelay=25)
	~QmitkVideoBackground ()
void	AddRenderWindow (vtkRenderWindow *renderWindow)
void	RemoveRenderWindow (vtkRenderWindow *renderWindow)
bool	IsRenderWindowIncluded (vtkRenderWindow *renderWindow)
void	SetTimerDelay (int ms)
void	Enable ()
void	Disable ()
bool	IsEnabled ()
mitk::VideoSource *	GetVideoSource ()
int	GetTimerDelay ()
Protected Types
typedef std::vector < mitk::VideoBackgroundVectorInfo >	RenderWindowVectorInfoType
Protected Member Functions
void	ResetVideoBackground ()
void	Modified ()
Protected Attributes
RenderWindowVectorInfoType	m_renderWindowVectorInfo
QTimer *	m_QTimer
mitk::VideoSource *	m_VideoSource
int	m_TimerDelay

Detailed Description

Displays a video in the background of one or more vtkRenderWindow(s). The video is provided by a mitkVideoSource / GetVideoTexture(). Caution: As the texture data is not being copied, the user is responsible for a valid pointer to the data. Also the image dimensions needs to be set correctly before enabling the background.

Definition at line 58 of file QmitkVideoBackground.h.

Member Typedef Documentation

typedef std::vector<mitk::VideoBackgroundVectorInfo> QmitkVideoBackground::RenderWindowVectorInfoType [protected]

Definition at line 109 of file QmitkVideoBackground.h.

Constructor & Destructor Documentation

QmitkVideoBackground::QmitkVideoBackground	(	mitk::VideoSource *	v,
		int	TimerDelay = `25`
	)

Definition at line 36 of file QmitkVideoBackground.cpp.

References m_TimerDelay, m_VideoSource, and ResetVideoBackground().

{
  m_VideoSource = v; 

  m_TimerDelay  = TimerDelay;
  ResetVideoBackground();
}

QmitkVideoBackground::~QmitkVideoBackground ( )

Definition at line 50 of file QmitkVideoBackground.cpp.

References Disable(), IsEnabled(), and m_renderWindowVectorInfo.

{
  if ( m_renderWindowVectorInfo.size() > 0 )
    if ( this->IsEnabled() )
      this->Disable();
}

Member Function Documentation

void QmitkVideoBackground::AddRenderWindow ( vtkRenderWindow * renderWindow )

Sets the renderwindow, in which the Video background will be shown. Make sure, you have called this function before calling Enable()

Definition at line 61 of file QmitkVideoBackground.cpp.

References mitk::VideoSource::FetchFrame(), mitk::VideoSource::GetImageHeight(), mitk::VideoSource::GetImageWidth(), m_renderWindowVectorInfo, m_VideoSource, Modified(), RemoveRenderWindow(), mitk::VideoBackgroundVectorInfo::renWin, mitk::VideoBackgroundVectorInfo::videoActor, mitk::VideoBackgroundVectorInfo::videoImport, and mitk::VideoBackgroundVectorInfo::videoRenderer.

Referenced by QmitkOpenCVVideoControls::on_PlayButton_clicked().

{
  RemoveRenderWindow(renderWindow);
  
  vtkRenderer*    videoRenderer   = vtkRenderer::New();
  vtkImageActor*  videoActor      = vtkImageActor::New();
  vtkImageImport* videoImport     = vtkImageImport::New();
  
  videoImport->SetDataScalarTypeToUnsignedChar();
  videoImport->SetNumberOfScalarComponents(3);

  if(m_VideoSource->GetImageWidth() == 0)
    m_VideoSource->FetchFrame();

  videoImport->SetWholeExtent(0,m_VideoSource->GetImageWidth()-1,0,m_VideoSource->GetImageHeight()-1,0,1-1);
  videoImport->SetDataExtentToWholeExtent();  
  
  mitk::VideoBackgroundVectorInfo v;
  v.renWin        = renderWindow;
  v.videoRenderer = videoRenderer;
  v.videoActor    = videoActor;
  v.videoImport   = videoImport;
  
  m_renderWindowVectorInfo.push_back(v); 

  Modified();
}

void QmitkVideoBackground::Disable ( )

Disables drawing of the color Video background. If you want to enable it, call the Enable() function.

Definition at line 136 of file QmitkVideoBackground.cpp.

References IsEnabled(), and m_QTimer.

Referenced by QmitkOpenCVVideoControls::Stop(), and ~QmitkVideoBackground().

{
  if ( this->IsEnabled() )
  {
    /*for(RenderWindowVectorInfoType::iterator it = m_renderWindowVectorInfo.begin(); 
      it != m_renderWindowVectorInfo.end(); it++)
    {
      mitk::VtkLayerController::GetInstance((*it).renWin)->RemoveRenderer((*it).videoRenderer);
    }*/
    m_QTimer->stop();
  }
}

void QmitkVideoBackground::Enable ( )

Enables drawing of the color Video background. If you want to disable it, call the Disable() function.

Definition at line 124 of file QmitkVideoBackground.cpp.

References m_QTimer, m_TimerDelay, Modified(), and UpdateVideo().

Referenced by QmitkOpenCVVideoControls::on_PlayButton_clicked().

{
  UpdateVideo();  
  Modified();
  
  m_QTimer->start(m_TimerDelay);
}

int QmitkVideoBackground::GetTimerDelay ( ) [inline]

Returns the timer delay

Definition at line 97 of file QmitkVideoBackground.h.

Referenced by QmitkOpenCVVideoControls::SetVideoBackground().

{ return m_TimerDelay; }

mitk::VideoSource* QmitkVideoBackground::GetVideoSource ( ) [inline]

Returns the videosource attached to this background

Definition at line 93 of file QmitkVideoBackground.h.

Referenced by QmitkOpenCVVideoControls::SetVideoBackground().

{ return m_VideoSource; }

bool QmitkVideoBackground::IsEnabled ( )

Checks, if the Video background is currently enabled (visible)

Definition at line 152 of file QmitkVideoBackground.cpp.

References m_QTimer.

Referenced by Disable(), and ~QmitkVideoBackground().

{
  if (m_QTimer->isActive())
      return true;
  else
      return false;    
}

bool QmitkVideoBackground::IsRenderWindowIncluded ( vtkRenderWindow * renderWindow )

Definition at line 109 of file QmitkVideoBackground.cpp.

References m_renderWindowVectorInfo.

{
  for(RenderWindowVectorInfoType::iterator it = m_renderWindowVectorInfo.begin(); 
    it != m_renderWindowVectorInfo.end(); it++)
  {
    if((*it).renWin == renderWindow)
      return true;
  }
  return false;
}

void QmitkVideoBackground::Modified ( ) [protected]

Definition at line 181 of file QmitkVideoBackground.cpp.

References mitk::VideoSource::GetImageHeight(), mitk::VtkLayerController::GetInstance(), m_renderWindowVectorInfo, and m_VideoSource.

Referenced by AddRenderWindow(), and Enable().

{ // ensures registration of video backrounds in each renderwindow
  for(RenderWindowVectorInfoType::iterator it = m_renderWindowVectorInfo.begin(); 
    it != m_renderWindowVectorInfo.end(); it++)
  {
    (*it).videoActor->SetInput((*it).videoImport->GetOutput());
    (*it).videoRenderer->AddActor2D((*it).videoActor);
    (*it).videoRenderer->ResetCamera();
    (*it).videoRenderer->InteractiveOff();
    (*it).videoRenderer->GetActiveCamera()->ParallelProjectionOn();
    (*it).videoRenderer->GetActiveCamera()->SetParallelScale(m_VideoSource->GetImageHeight()/2);

    if(!mitk::VtkLayerController::GetInstance((*it).renWin)->IsRendererInserted((*it).videoRenderer))
      mitk::VtkLayerController::GetInstance((*it).renWin)->InsertBackgroundRenderer((*it).videoRenderer,true);
  } 
}

void QmitkVideoBackground::NewFrameAvailable ( mitk::VideoSource * ) [signal]

Referenced by UpdateVideo().

void QmitkVideoBackground::RemoveRenderWindow ( vtkRenderWindow * renderWindow )

Definition at line 89 of file QmitkVideoBackground.cpp.

References mitk::VtkLayerController::GetInstance(), and m_renderWindowVectorInfo.

Referenced by AddRenderWindow(), and QmitkOpenCVVideoControls::Stop().

{
  for(RenderWindowVectorInfoType::iterator it = m_renderWindowVectorInfo.begin(); 
    it != m_renderWindowVectorInfo.end(); it++)
  {
    if((*it).renWin == renderWindow)
    {
      // unregister video backround renderer from renderwindow
      mitk::VtkLayerController::GetInstance((*it).renWin)->RemoveRenderer((*it).videoRenderer);

      (*it).videoRenderer->Delete();
      (*it).videoActor->Delete();
      (*it).videoImport->Delete();
      m_renderWindowVectorInfo.erase(it);
      return;
      //delete &(*it);  // memory leak renderwindowvectorinfo ??
    }
  }
}

void QmitkVideoBackground::ResetVideoBackground ( ) [protected]

Definition at line 43 of file QmitkVideoBackground.cpp.

References m_QTimer, m_renderWindowVectorInfo, and UpdateVideo().

Referenced by QmitkVideoBackground().

{
  m_renderWindowVectorInfo.clear();
  m_QTimer = new QTimer(this);
  connect( m_QTimer, SIGNAL(timeout()), SLOT(UpdateVideo()) );
}

void QmitkVideoBackground::SetTimerDelay ( int ms ) [inline]

Definition at line 75 of file QmitkVideoBackground.h.

Referenced by QmitkOpenCVVideoControls::on_PlayButton_clicked().

  {
    m_TimerDelay = ms;
    ResetVideoBackground();
  }

void QmitkVideoBackground::UpdateVideo ( ) [slot]

Definition at line 160 of file QmitkVideoBackground.cpp.

References mitk::RenderingManager::GetInstance(), mitk::VideoSource::GetVideoTexture(), m_renderWindowVectorInfo, m_VideoSource, and NewFrameAvailable().

Referenced by Enable(), and ResetVideoBackground().

{  
  unsigned char *src = 0;
  src = m_VideoSource->GetVideoTexture();
  if(src)
  { 
    if(m_renderWindowVectorInfo.size()>0)
    {
      for(RenderWindowVectorInfoType::iterator it = m_renderWindowVectorInfo.begin(); 
        it != m_renderWindowVectorInfo.end(); it++)
      {
        (*it).videoImport->SetImportVoidPointer(src);
        (*it).videoImport->Modified();
        (*it).videoImport->Update();
        mitk::RenderingManager::GetInstance()->RequestUpdate((*it).renWin);
      }
    }
  }
  emit NewFrameAvailable ( m_VideoSource );
}