IDMOVideoOutputOptimizations::QueryOperationModePreferences

Microsoft DirectShow 9.0

IDMOVideoOutputOptimizations::QueryOperationModePreferences

The QueryOperationModePreferences method retrieves the DMO's preferred optimization features.

Syntax

  HRESULT QueryOperationModePreferences(
    ULONG ulOutputStreamIndex,
    DWORD* pdwRequestedCapabilities
);

Parameters

ulOutputStreamIndex

Zero-based index of an output stream on the DMO.

pdwRequestedCapabilities

Pointer to a variable that receives the DMO's requested features. The returned value is a bitwise combination of zero or more flags from the DMO_VIDEO_OUTPUT_STREAM_FLAGS enumeration.

Return Value

Returns an HRESULT value. Possible values include those in the following table.

Return Code	Description
DMO_E_INVALIDSTREAMINDEX	Invalid stream index
E_POINTER	NULL pointer argument
S_OK	Success

Requirements

  Header: Declared in Mediaobj.h; include Dmo.h
  Library: Dmoguids.lib.

See Also

• IDMOVideoOutputOptimizations Interface