Class CMdaImageBitmapToDescUtility

CMdaImageBitmapToDescUtility

Support

Supported from 5.0

Description

Implements format conversion of a bitmap to a descriptor-based image.

The class provides functions to create an instance of this conversion utility and to initialise the descriptor.

Conversion is performed using the image conversion utility interface.

Derivation

CActive The core class of the active object abstraction CBase Base class for all classes to be instantiated on the heap CMdaImageBitmapToDescUtility Implements format conversion of a bitmap to a descriptor-based image CMdaImageDataWriteUtility Base class used in the derivation of CMdaImageBitmapToDescUtility and CMdaImageBitmapToFileUtility CMdaImageUtility The abstract base class for the image conversion utilities CMdaResource Base class used in the derivation of CMdaImageUtility MMdaObjectStateChangeObserver An interface class for handling the change of state of an audio data sample object

Defined in CMdaImageBitmapToDescUtility:
CreateL(), NewL()

Inherited from CActive:
Cancel(), Deque(), DoCancel(), EPriorityHigh, EPriorityIdle, EPriorityLow, EPriorityStandard, EPriorityUserInput, IsActive(), IsAdded(), Priority(), RunError(), RunL(), SetActive(), SetPriority(), TPriority, iStatus

Inherited from CBase:
operator new()

Inherited from CMdaImageUtility:
CancelConvertL(), Close(), ConvertL(), FrameCount(), FrameInfo()

Inherited from MMdaObjectStateChangeObserver:
MoscoStateChangeEvent()

static CMdaImageBitmapToFileUtility* NewL(MMdaImageUtilObserver& aObserver,CMdaServer* aServer = NULL);

Description

Constructs a new instance of the bitmap to descriptor-based image conversion utility.

The function leaves if this object cannot be created.

Parameters

MMdaImageUtilObserver& aObserver The image utility observer interface CMdaServer* aServer = NULL A pointer to a server object. The default is NULL which means that one is automatically constructed and owned by this conversion utility object. If not NULL, the client must construct, and be responsible for, the server object. This option may be more efficient if a number of conversion utility objects are to be created.

Return value

CMdaImageBitmapToFileUtility* Pointer to the new instance of the bitmap to descriptor-based image conversion utility.

void CreateL(TDes8& aDescriptor,TMdaClipFormat* aFormat,TMdaPackage* aCodec,TMdaPackage* aExtra);

Description

Initialises the supplied descriptor to receive the descriptor-based image.

The function is asynchronous. When the operation is complete, successfully or otherwise, the callback function MMdaImageUtilObserver::MiuoCreateComplete() is called.

The descriptor must have been successfully initialised before any conversion operation can start.

Parameters

TDes8& aDescriptor A descriptor to contain the image. TMdaClipFormat* aFormat The data format. This is optional. TMdaPackage* aCodec The codec to use. This is optional. TMdaPackage* aExtra Additional information which the Media Server may need to recognise the data format. This is optional.