IMediaStream::GetInformation

  • Article

Retrieves the stream's purpose ID and media type.

HRESULT GetInformation(
MSPID *pPurposeId,
STREAM_TYPE *pType);

Parameters

  • pPurposeId
    [out] Pointer to an MSPID value that will contain the stream's purpose ID. If this parameter is NULL on entry, the method won't retrieve the purpose ID.
  • pType
    [out] Pointer to a STREAM_TYPE enumerated data type value that will contain the stream's media type. If this parameter is NULL on entry, the method won't retrieve the media type.

Return Values

Returns S_OK if successful or E_POINTER if one of the parameters is invalid.

Remarks

The value retrieved in the pPurposeId parameter will usually be either MSPID_PrimaryVideo, which identifies the primary video stream, or MSPID_PrimaryAudio, which identifies the primary audio stream; however, you can define other values if necessary.

 Last updated on Tuesday, July 13, 2004

© 1992-2000 Microsoft Corporation. All rights reserved.