GetTopologyWorkQueueMMCSSClass

IMFWorkQueueServices::GetTopologyWorkQueueMMCSSClass method

Retrieves the Multimedia Class Scheduler Service (MMCSS) class for a specified branch of the current topology.

Syntax


HRESULT GetTopologyWorkQueueMMCSSClass(
  [in]      DWORD  dwTopologyWorkQueueId,
  [out]     LPWSTR pwszClass,
  [in, out] DWORD  *pcchClass
);

Parameters

dwTopologyWorkQueueId [in]

Identifies the work queue assigned to this topology branch. The application defines this value by setting the MF_TOPONODE_WORKQUEUE_ID attribute on the source node for the branch.

pwszClass [out]

Pointer to a buffer that receives the name of the MMCSS class. This parameter can be NULL.

pcchClass [in, out]

On input, specifies the size of the pwszClass buffer, in characters. On output, receives the required size of the buffer, in characters. The size includes the terminating null character.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return codeDescription
S_OK

The method succeeded.

E_INVALIDARG

There is no work queue with the specified identifier.

MF_E_BUFFERTOOSMALL

The pwszClass buffer is too small to receive the class name.

 

Requirements

Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]

Header

Mfidl.h

Library

Mfuuid.lib

See also

IMFWorkQueueServices

 

 

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