IMediaObject::GetInputStreamInfo method

The GetInputStreamInfo method retrieves information about an input stream, such as any restrictions on the number of samples per buffer, and whether the stream performs lookahead on the input data. This information never changes.

Syntax


HRESULT GetInputStreamInfo(
  DWORD dwInputStreamIndex,
  [out]  DWORD *pdwFlags
);

Parameters

dwInputStreamIndex

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

pdwFlags [out]

Pointer to a variable that receives a bitwise combination of zero or more DMO_INPUT_STREAM_INFO_FLAGS flags.

Return value

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

Return codeDescription
DMO_E_INVALIDSTREAMINDEX

Invalid stream index

E_POINTER

NULL pointer argument

S_OK

Success

 

Remarks

The DMO_INPUT_STREAMF_HOLDS_BUFFERS flag indicates that the DMO performs lookahead on the incoming data.

The application must be sure to allocate sufficient buffers for the DMO to process the input. Call the IMediaObject::GetInputSizeInfo method to determine the buffer requirements.

Requirements

Header

Mediaobj.h (include Dmo.h)

Library

Dmoguids.lib

See also

IMediaObject Interface

 

 

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