MFTOPONODE_ATTRIBUTE_UPDATE structure (mfidl.h)

Specifies a new attribute value for a topology node.

Syntax

typedef struct _MFTOPONODE_ATTRIBUTE_UPDATE {
  TOPOID            NodeId;
  GUID              guidAttributeKey;
  MF_ATTRIBUTE_TYPE attrType;
  union {
    UINT32 u32;
    UINT64 u64;
    double d;
  };
} MFTOPONODE_ATTRIBUTE_UPDATE;

Members

NodeId

The identifier of the topology node to update. To get the identifier of a topology node, call IMFTopologyNode::GetTopoNodeID.

guidAttributeKey

GUID that specifies the attribute to update.

attrType

Attribute type, specified as a member of the MF_ATTRIBUTE_TYPE enumeration.

u32

Attribute value (unsigned 32-bit integer). This member is used when attrType equals MF_ATTRIBUTE_UINT32.

u64

Attribute value (unsigned 32-bit integer). This member is used when attrType equals MF_ATTRIBUTE_UINT64. See Remarks.

d

Attribute value (floating point). This member is used when attrType equals MF_ATTRIBUTE_DOUBLE.

Remarks

Due to an error in the structure declaration, the u64 member is declared as a 32-bit integer, not a 64-bit integer. Therefore, any 64-bit value passed to the IMFTopologyNodeAttributeEditor::UpdateNodeAttributes method is truncated to 32 bits.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Header	mfidl.h

See also

IMFTopologyNodeAttributeEditor::UpdateNodeAttributes

Media Foundation Structures

TOPOID