Class TJpegImageData

class TJpegImageData : public TImageDataBlock;

Description

JPEG specific image data variant which holds color sampling and quality factor information.

It can be used with both the JPEG decoder and encoder.

Derivation

• TImageDataBlock - The abstract base class for all format-specific image data variants.

• TJpegImageData - ...

Members

Defined in TJpegImageData:

• DuplicateL(CFrameImageData &)const
• EColor420Horizontal and vertical chrominance decimation.
• EColor422Horizontal chrominance decimation.
• EColor444No chrominance decimation.
• EMonochromeMonochrome.
• TColorSamplingFlag reflecting the color sampling type.
• TJpegImageData()Default constructor for this class.
• iQualityFactorThe quality factor.
• iSampleScheme The color sampling scheme to use.

Inherited from TImageDataBlock:

• DataType()constReturns the data type of the current TImageDataBlock object.
• TImageDataBlock(TUid)Constructs and initialises the TImageDataBlock object to the data type specified...

IMPORT_C TJpegImageData();

Description

Default constructor for this class.

private: virtual TImageDataBlock* DuplicateL(CFrameImageData &aFrameImageData) const;

Description

Parameters

CFrameImageData &aFrameImageData

Return value

TImageDataBlock *

TColorSampling

Description

Flag reflecting the color sampling type.

EMonochrome Monochrome. EColor420 Horizontal and vertical chrominance decimation. EColor422 Horizontal chrominance decimation. EColor444 No chrominance decimation.

TColorSampling iSampleScheme;

Description

The color sampling scheme to use.

See also:

• TJpegImageData::TColorSamplingFlag reflecting the color sampling type.

TInt iQualityFactor;

Description

The quality factor.

This represents the current allowable percentage level of degradation when compressing the image data.

The range is 0 to 100 inclusive.