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CVideoDecoderInfo Class Reference

class CVideoDecoderInfo : public CBase

This class contains information about a single video decoder. Although it mainly contains static data, it is defined as a complete CBase-derived class since the data is relatively complex and proper memory management is necessary.

The objects are created by the video decoder hardware devices, and used by the MSL video client code.

Inherits from

Public Member Functions
~CVideoDecoderInfo ()
IMPORT_C TBool Accelerated ()
IMPORT_C void AddSupportedScreenL ( TInt )
IMPORT_C const TDesC8 & CodingStandardSpecificInfo ()
IMPORT_C void GetSupportedScreensL ( RArray < TInt > &)
IMPORT_C const TDesC & Identifier ()
IMPORT_C const TDesC8 & ImplementationSpecificInfo ()
IMPORT_C const TDesC & Manufacturer ()
IMPORT_C TUint MaxBitrate ()
IMPORT_C const RArray < TPictureRateAndSize > & MaxPictureRates ()
IMPORT_C const TSize & MaxPictureSize ()
IMPORT_C CVideoDecoderInfo * NewL ( TUid , const TDesC &, const TDesC &, TVersion , const TArray < CCompressedVideoFormat * > &, TBool , TBool , const TSize &, TUint , const TArray < TPictureRateAndSize > &, TBool , TBool , const TDesC8 &, const TDesC8 &)
IMPORT_C void SetSupportsContentProtected (const TBool )
IMPORT_C const RPointerArray < CCompressedVideoFormat > & SupportedFormats ()
IMPORT_C TBool SupportsContentProtected ()
IMPORT_C TBool SupportsDirectDisplay ()
IMPORT_C TBool SupportsFormat (const CCompressedVideoFormat &)
IMPORT_C TBool SupportsPictureLoss ()
IMPORT_C TBool SupportsSliceLoss ()
IMPORT_C TUid Uid ()
IMPORT_C TVersion Version ()
Private Member Functions
CVideoDecoderInfo ( TUid , TVersion , TBool , TBool , const TSize &, TUint , TBool , TBool )
void ConstructL (const TDesC &, const TDesC &, const TArray < CCompressedVideoFormat * > &, const TArray < TPictureRateAndSize > &, const TDesC8 &, const TDesC8 &)
Inherited Functions
CBase::CBase()
CBase::Delete(CBase *)
CBase::Extension_(TUint,TAny *&,TAny *)
CBase::operator new(TUint)
CBase::operator new(TUint,TAny *)
CBase::operator new(TUint,TLeave)
CBase::operator new(TUint,TLeave,TUint)
CBase::operator new(TUint,TUint)
CBase::~CBase()
Private Attributes
TBool iAccelerated
HBufC8 * iCodingStandardSpecificInfo
HBufC * iIdentifier
HBufC8 * iImplementationSpecificInfo
HBufC * iManufacturer
TUint iMaxBitrate
RArray < TPictureRateAndSize > iMaxPictureRates
TSize iMaxPictureSize
RPointerArray < CCompressedVideoFormat > iSupportedFormats
RArray < TInt > iSupportedScreens
TBool iSupportsContentProtected
TBool iSupportsDirectDisplay
TBool iSupportsPictureLoss
TBool iSupportsSliceLoss
TUid iUid
TVersion iVersion

Constructor & Destructor Documentation

CVideoDecoderInfo(TUid, TVersion, TBool, TBool, const TSize &, TUint, TBool, TBool)

CVideoDecoderInfo ( TUid aUid,
TVersion aVersion,
TBool aAccelerated,
TBool aSupportsDirectDisplay,
const TSize & aMaxPictureSize,
TUint aMaxBitrate,
TBool aSupportsPictureLoss,
TBool aSupportsSliceLoss
) [private]

Parameters

TUid aUid
TVersion aVersion
TBool aAccelerated
TBool aSupportsDirectDisplay
const TSize & aMaxPictureSize
TUint aMaxBitrate
TBool aSupportsPictureLoss
TBool aSupportsSliceLoss

~CVideoDecoderInfo()

IMPORT_C ~CVideoDecoderInfo ( )

Destructor.

Member Functions Documentation

Accelerated()

IMPORT_C TBool Accelerated ( ) const

Returns whether the decoder is hardware-accelerated. A hardware-accelerated decoder can run on an application DSP or dedicated hardware.

AddSupportedScreenL(TInt)

IMPORT_C void AddSupportedScreenL ( TInt aScreenNo )
Adds the screen number into the list of screens supported by the decoder.
leave
"KErrNoMemory when there is no memory to expand the list of supported screens. KErrNotSupported if the secondary screen display is not supported in Multimedia Framework."

Parameters

TInt aScreenNo

CodingStandardSpecificInfo()

IMPORT_C const TDesC8 & CodingStandardSpecificInfo ( ) const

Returns coding-standard specific information about the decoder.

ConstructL(const TDesC &, const TDesC &, const TArray< CCompressedVideoFormat * > &, const TArray< TPictureRateAndSize > &, const TDesC8 &, const TDesC8 &)

void ConstructL ( const TDesC & aManufacturer,
const TDesC & aIdentifier,
const TArray < CCompressedVideoFormat * > & aSupportedFormats,
const TArray < TPictureRateAndSize > & aMaxPictureRates,
const TDesC8 & aCodingStandardSpecificInfo,
const TDesC8 & aImplementationSpecificInfo
) [private]

Parameters

const TDesC & aManufacturer
const TDesC & aIdentifier
const TArray < CCompressedVideoFormat * > & aSupportedFormats
const TArray < TPictureRateAndSize > & aMaxPictureRates
const TDesC8 & aCodingStandardSpecificInfo
const TDesC8 & aImplementationSpecificInfo

GetSupportedScreensL(RArray< TInt > &)

IMPORT_C void GetSupportedScreensL ( RArray < TInt > & aSupportedScreens ) const
Lists the screens supported by the decoder.
leave
"KErrNotSupported if the secondary screen display is not supported in Multimedia Framework. KErrNoMemory when there is no memory to expand the list."

Parameters

RArray < TInt > & aSupportedScreens "An array to retrieve the list of supported screens. This method resets the array before adding elements to it. The array must be created and destroyed by the caller."

Identifier()

IMPORT_C const TDesC & Identifier ( ) const

Returns the codec device manufacturer-specific identifier. The combination of the manufacturer and identifier uniquely identifies the hardware device.

ImplementationSpecificInfo()

IMPORT_C const TDesC8 & ImplementationSpecificInfo ( ) const

Returns implementation-specific information about the decoder.

Manufacturer()

IMPORT_C const TDesC & Manufacturer ( ) const

Returns the codec device manufacturer.

MaxBitrate()

IMPORT_C TUint MaxBitrate ( ) const

Returns the maximum bit-rate supported by the decoder.

Note that if the decoder reports that it supports a certain profile and level, then it shall support all bitstreams corresponding to that profile/level. This method can be used to specify capabilities that are beyond the standard levels (for example some MPEG-4 bitstreams are encoded with bit rates that are higher than those specified by the profile/level of the bitstream).

MaxPictureRates()

IMPORT_C const RArray < TPictureRateAndSize > & MaxPictureRates ( ) const

Returns the maximum picture size/rate combinations supported by the decoder.

Video decoders can have different maximum picture rate limitations depending on the picture size used. Note that if the decoder reports that it supports a certain profile and level, then it shall support all bitstreams corresponding to that profile/level. This method can be used to specify capabilities that are beyond the standard levels (for example some MPEG-4 bitstreams are encoded with picture rates that are beyond those specified by the profile/level of the bitstream).

MaxPictureSize()

IMPORT_C const TSize & MaxPictureSize ( ) const

Returns the maximum picture size the decoder supports.

Note that if the decoder reports that it supports a certain profile and level, then it shall support all bitstreams corresponding to that profile/level. This method can be used to specify capabilities that are beyond the standard levels (for example some MPEG-4 bitstreams are encoded with picture sizes that are larger than those specified by the profile/level of the bitstream).

NewL(TUid, const TDesC &, const TDesC &, TVersion, const TArray< CCompressedVideoFormat * > &, TBool, TBool, const TSize &, TUint, const TArray< TPictureRateAndSize > &, TBool, TBool, const TDesC8 &, const TDesC8 &)

IMPORT_C CVideoDecoderInfo * NewL ( TUid aUid,
const TDesC & aManufacturer,
const TDesC & aIdentifier,
TVersion aVersion,
const TArray < CCompressedVideoFormat * > & aSupportedFormats,
TBool aAccelerated,
TBool aSupportsDirectDisplay,
const TSize & aMaxPictureSize,
TUint aMaxBitrate,
const TArray < TPictureRateAndSize > & aMaxPictureRates,
TBool aSupportsPictureLoss,
TBool aSupportsSliceLoss,
const TDesC8 & aCodingStandardSpecificInfo =  KNullDesC8 ,
const TDesC8 & aImplementationSpecificInfo =  KNullDesC8
) [static]

Creates and returns a new CVideoDecoderInfo object.

leave
"This method may leave with one of the system-wide error codes."

Parameters

TUid aUid "The uid of the decoder."
const TDesC & aManufacturer "The video decoder manufacturer."
const TDesC & aIdentifier "The manufacturer-specific identifier for this video decoder."
TVersion aVersion "The version of this video decoder."
const TArray < CCompressedVideoFormat * > & aSupportedFormats "An array of the formats supported by the decoder. A copy will be taken of the array and the referenced CCompressedVideoFormat objects" @param "aAccelerated" "Whether this decoder is accelerated or not." @param "aSupportsDirectDisplay" "Whether this decoder supports direct display or not." @param "aMaxPictureSize" "The maximum picture size supported by the decoder." @param "aMaxBitrate" "The maximum bit rate supported by the decoder. Use KMaxTUint32 if there are no bit-rate restrictions." @param "aMaxPictureRates" "An array of the maximum picture size/rate combinations supported by the decoder." @param "aSupportsPictureLoss" "Whether the decoder supports picture loss indications." @param "aSupportsSliceLoss" "Whether the decoder supports slice loss indications." @param "aCodingStandardSpecificInfo" "Coding-standard specific information about the decoder." @param "aImplementationSpecificInfo" "Implementation-specific information about the decoder."
TBool aAccelerated
TBool aSupportsDirectDisplay
const TSize & aMaxPictureSize
TUint aMaxBitrate
const TArray < TPictureRateAndSize > & aMaxPictureRates
TBool aSupportsPictureLoss
TBool aSupportsSliceLoss
const TDesC8 & aCodingStandardSpecificInfo =  KNullDesC8
const TDesC8 & aImplementationSpecificInfo =  KNullDesC8

SetSupportsContentProtected(const TBool)

IMPORT_C void SetSupportsContentProtected ( const TBool aSetting )

Sets a flag indicating whether the Decoder supports per picture content protection. E.g. Where content protection within a video stream can alter.

Parameters

const TBool aSetting "Set to TRUE to indicate decoder supports content protection. TVideoPicture::TVideoPictureOptions::EContentProtected TVideoInputBuffer::TVideoBufferOptions::EContentProtected

SupportedFormats()

IMPORT_C const RPointerArray < CCompressedVideoFormat > & SupportedFormats ( ) const

Lists the video formats, including submodes, supported by the decoder.

SupportsContentProtected()

IMPORT_C TBool SupportsContentProtected ( ) const

Returns whether the Decoder supports per picture content protection. E.g. Where content protection within a video stream can alter.

SupportsDirectDisplay()

IMPORT_C TBool SupportsDirectDisplay ( ) const

Returns whether the hardware device supports output directly to the screen. Output to memory buffers is always supported.

SupportsFormat(const CCompressedVideoFormat &)

IMPORT_C TBool SupportsFormat ( const CCompressedVideoFormat & aFormat ) const

Checks if the decoder supports the given format.

Parameters

const CCompressedVideoFormat & aFormat "The format to check. The reference is not used after the method returns."

SupportsPictureLoss()

IMPORT_C TBool SupportsPictureLoss ( ) const

Returns whether the decoder supports picture loss indications. If true, the decoder indicates lost pictures by calling MdvpoPictureLoss().

SupportsSliceLoss()

IMPORT_C TBool SupportsSliceLoss ( ) const

Returns whether the decoder supports slice loss indications. If true, the decoder indicates lost macroblocks by calling MdvpoSliceLoss().

Uid()

IMPORT_C TUid Uid ( ) const

Returns the decoder UID.

Version()

IMPORT_C TVersion Version ( ) const

Returns the decoder version.

Member Data Documentation

TBool iAccelerated

TBool iAccelerated [private]

HBufC8 * iCodingStandardSpecificInfo

HBufC8 * iCodingStandardSpecificInfo [private]

HBufC * iIdentifier

HBufC * iIdentifier [private]

HBufC8 * iImplementationSpecificInfo

HBufC8 * iImplementationSpecificInfo [private]

HBufC * iManufacturer

HBufC * iManufacturer [private]

TUint iMaxBitrate

TUint iMaxBitrate [private]

RArray< TPictureRateAndSize > iMaxPictureRates

RArray < TPictureRateAndSize > iMaxPictureRates [private]

TSize iMaxPictureSize

TSize iMaxPictureSize [private]

RPointerArray< CCompressedVideoFormat > iSupportedFormats

RPointerArray < CCompressedVideoFormat > iSupportedFormats [private]

RArray< TInt > iSupportedScreens

RArray < TInt > iSupportedScreens [private]

TBool iSupportsContentProtected

TBool iSupportsContentProtected [private]

TBool iSupportsDirectDisplay

TBool iSupportsDirectDisplay [private]

TBool iSupportsPictureLoss

TBool iSupportsPictureLoss [private]

TBool iSupportsSliceLoss

TBool iSupportsSliceLoss [private]

TUid iUid

TUid iUid [private]

TVersion iVersion

TVersion iVersion [private]

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All rights reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License v1.0.