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IMediaObject::GetInputStreamInfo

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Microsoft DirectShow 9.0

IMediaObject::GetInputStreamInfo

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,
    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 Code Description
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: Declared in Mediaobj.h; include Dmo.h
  Library: Dmoguids.lib.

See Also