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IMFByteStream::Seek method

Moves the current position in the stream by a specified offset.

Syntax


HRESULT Seek(
  [in]   MFBYTESTREAM_SEEK_ORIGIN SeekOrigin,
  [in]   LONGLONG qwSeekOffset,
  [in]   DWORD dwSeekFlags,
  [out]  QWORD *pqwCurrentPosition
);

Parameters

SeekOrigin [in]

Specifies the origin of the seek as a member of the MFBYTESTREAM_SEEK_ORIGIN enumeration. The offset is calculated relative to this position.

qwSeekOffset [in]

Specifies the new position, as a byte offset from the seek origin.

dwSeekFlags [in]

Specifies zero or more flags. The following flags are defined.

ValueMeaning
MFBYTESTREAM_SEEK_FLAG_CANCEL_PENDING_IO

All pending I/O requests are canceled after the seek request completes successfully.

 

pqwCurrentPosition [out]

Receives the new position after the seek.

Return value

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:

  • Windows XP with Service Pack 2 (SP2) and later.
  • Windows XP Media Center Edition 2005 with KB900325 (Windows XP Media Center Edition 2005) and KB925766 (October 2006 Update Rollup for Windows XP Media Center Edition) installed.

Implementation notes: This method should update the current position in the stream by adding the qwSeekOffset to the seek SeekOrigin position. This should be the same value passed back in the pqwCurrentPosition parameter. Other methods that can update the current position are Read, BeginRead, Write, BeginWrite, and SetCurrentPosition.

Requirements

Minimum supported client

Windows Vista [desktop apps | Windows Store apps]

Minimum supported server

Windows Server 2008 [desktop apps | Windows Store apps]

Header

Mfobjects.h (include Mfidl.h)

Library

Mfuuid.lib

See also

IMFByteStream

 

 

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