class used to compress/encode images using threads. More...

#include <vtkDataEncoder.h>

Inheritance diagram for vtkDataEncoder:

Collaboration diagram for vtkDataEncoder:

Public Types
typedef vtkObject	Superclass

Public Types inherited from vtkObject
typedef vtkObjectBase	Superclass

Public Member Functions
virtual int	IsA (const char *type)

vtkDataEncoder *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent)

void	Initialize ()

void	PushAndTakeReference (vtkTypeUInt32 key, vtkImageData *&data, int quality)

bool	GetLatestOutput (vtkTypeUInt32 key, vtkSmartPointer< vtkUnsignedCharArray > &data)

void	Flush (vtkTypeUInt32 key)

const char *	EncodeAsBase64Png (vtkImageData *img, int compressionLevel=5)

const char *	EncodeAsBase64Jpg (vtkImageData *img, int quality=50)

Public Member Functions inherited from vtkObject
vtkObject *	NewInstance () const

virtual void	DebugOn ()

virtual void	DebugOff ()

bool	GetDebug ()

void	SetDebug (bool debugFlag)

virtual void	Modified ()

virtual unsigned long	GetMTime ()

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)

vtkCommand *	GetCommand (unsigned long tag)

void	RemoveObserver (vtkCommand *)

void	RemoveObservers (unsigned long event, vtkCommand *)

void	RemoveObservers (const char event, vtkCommand )

int	HasObserver (unsigned long event, vtkCommand *)

int	HasObserver (const char event, vtkCommand )

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

int	HasObserver (unsigned long event)

int	HasObserver (const char *event)

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)

int	InvokeEvent (unsigned long event, void *callData)

int	InvokeEvent (const char event, void callData)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const

virtual void	Delete ()

virtual void	FastDelete ()

void	Print (ostream &os)

virtual void	Register (vtkObjectBase *o)

virtual void	UnRegister (vtkObjectBase *o)

void	SetReferenceCount (int)

void	PrintRevisions (ostream &)

virtual void	PrintHeader (ostream &os, vtkIndent indent)

virtual void	PrintTrailer (ostream &os, vtkIndent indent)

int	GetReferenceCount ()

Static Public Member Functions
static vtkDataEncoder *	New ()

static int	IsTypeOf (const char *type)

static vtkDataEncoder *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkObject
static int	IsTypeOf (const char *type)

static vtkObject *	SafeDownCast (vtkObjectBase *o)

static vtkObject *	New ()

static void	BreakOnError ()

static void	SetGlobalWarningDisplay (int val)

static void	GlobalWarningDisplayOn ()

static void	GlobalWarningDisplayOff ()

static int	GetGlobalWarningDisplay ()

Static Public Member Functions inherited from vtkObjectBase
static int	IsTypeOf (const char *name)

static vtkObjectBase *	New ()

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkDataEncoder ()

	~vtkDataEncoder ()

Protected Member Functions inherited from vtkObject
	vtkObject ()

virtual	~vtkObject ()

virtual void	RegisterInternal (vtkObjectBase *, int check)

virtual void	UnRegisterInternal (vtkObjectBase *, int check)

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=NULL)

void	InternalReleaseFocus ()

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Additional Inherited Members
Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Detailed Description

class used to compress/encode images using threads.

vtkDataEncoder is used to compress and encode images using threads. Multiple images can be pushed into the encoder for compression and encoding. We use a vtkTypeUInt32 as the key to identify different image pipes. The images in each pipe will be processed in parallel threads. The latest compressed and encoded image can be accessed using GetLatestOutput().

vtkDataEncoder uses a thread-pool to do the compression and encoding in parallel. Note that images may not come out of the vtkDataEncoder in the same order as they are pushed in, if an image pushed in at N-th location takes longer to compress and encode than that pushed in at N+1-th location or if it was pushed in before the N-th location was even taken up for encoding by the a thread in the thread pool.

Tests:: vtkDataEncoder (Tests)

Definition at line 45 of file vtkDataEncoder.h.

Member Typedef Documentation

typedef vtkObject vtkDataEncoder::Superclass

Definition at line 49 of file vtkDataEncoder.h.

Constructor & Destructor Documentation

vtkDataEncoder::vtkDataEncoder ( )

protected

vtkDataEncoder::~vtkDataEncoder ( )

protected

Member Function Documentation

static vtkDataEncoder* vtkDataEncoder::New ( )

static

static int vtkDataEncoder::IsTypeOf ( const char * type )

static

virtual int vtkDataEncoder::IsA ( const char * name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

static vtkDataEncoder* vtkDataEncoder::SafeDownCast ( vtkObjectBase * o )

static

virtual vtkObjectBase* vtkDataEncoder::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkObject.

vtkDataEncoder* vtkDataEncoder::NewInstance ( ) const

void vtkDataEncoder::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

virtual

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkObject.

void vtkDataEncoder::Initialize ( )

Re-initializes the encoder. This will abort any on going encoding threads and clear internal data-structures.

void vtkDataEncoder::PushAndTakeReference	(	vtkTypeUInt32	key,
		vtkImageData *&	data,
		int	quality
	)

Push an image into the encoder. It is not safe to modify the image after this point, including changing the reference counts for it. You may run into thread safety issues. Typically, the caller code will simply release reference to the data and stop using it. vtkDataEncoder takes over the reference for the image and will call vtkObject::UnRegister() on it when it's done.

bool vtkDataEncoder::GetLatestOutput	(	vtkTypeUInt32	key,
		vtkSmartPointer< vtkUnsignedCharArray > &	data
	)

Get access to the most-recent fully encoded result corresponding to the given key, if any. This methods returns true if the data obtained is the result from the most recent Push() for the key, if any. If this method returns false, it means that there's some image either being processed on pending processing.

void vtkDataEncoder::Flush ( vtkTypeUInt32 key )

Flushes the encoding pipe and blocks till the most recently pushed image for the particular key has been processed. This call will block. Once this method returns, caller can use GetLatestOutput(key) to access the processed output.

const char* vtkDataEncoder::EncodeAsBase64Png	(	vtkImageData *	img,
		int	compressionLevel = `5`
	)

Take an image data and synchronously convert it to a base-64 encoded png.

const char* vtkDataEncoder::EncodeAsBase64Jpg	(	vtkImageData *	img,
		int	quality = `50`
	)

Take an image data and synchronously convert it to a base-64 encoded jpg.

The documentation for this class was generated from the following file:

dox/Web/Core/vtkDataEncoder.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation