Class TMPEG4VisualVOPHeader

class TMPEG4VisualVOPHeader;

Description

Mpeg4 visual VOP header.

Members

Defined in TMPEG4VisualVOPHeader:
iModuloTimeBase, iVOPCoded, iVOPCodingType, iVOPId, iVOPIdForPrediction, iVOPIdForPredictionValid, iVOPQuant, iVOPTimeIncrement

TMPEG4VisualVOPType iVOPCodingType;

Description

Indicates the coding type of the VOP.

TUint iModuloTimeBase;

Description

Indicates the number of seconds elapsed since the previous GOV header or since the previous picture in display order, whichever is closer in display order. The value of iModuloTimeBase shall be set equal to the decoded value derived from a series of modulo_time_base fields as specified in MPEG-4 Visual.

TUint16 iVOPTimeIncrement;

Description

VOP display time relative to iModuloTimeBase in clock ticks. The value of iVOPTimeIncrement shall be set equal to the value of the vop_time_increment syntax element of MPEG-4 Visual.

TBool iVOPCoded;

Description

iVOPCoded equal to EFalse indicates that the VOP is a copy of the previous VOP in display order. The value of iVOPCoded shall be set equal to the value of the vop_coded syntax element of MPEG-4 Visual.

TUint iVOPQuant;

Description

Indicates the initial value of the quantization parameter. iVOPQuant shall be set equal to the value of the vop_quant syntax element.

TUint16 iVOPId;

Description

Indicates the VOP ID. iVOPId shall be set equal to the value of the vop_id syntax element. Valid only if the flag newpred_enable is equal to 1.

TBool iVOPIdForPredictionValid;

Description

When equal to ETrue indicates the following iVOPIdForPrediction is valid. Valid only if the flag newpred_enable is equal to 1.

TUint16 iVOPIdForPrediction;

Description

Indicates VOP ID of the VOP that is used as the reference VOP for the current VOP. iVOPIdForPrediction shall be set equal to the value of the vop_id_for_prediction if the syntax element is present (i.e. the ). Valid only if iVOPIdForPredictionValid is equal to ETrue.