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IMFByteStream::Seek method (mfobjects.h)

  • Article

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

Syntax

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

Parameters

[in] SeekOrigin

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

[in] llSeekOffset

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

[in] dwSeekFlags

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

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

[out] pqwCurrentPosition

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

Requirement Value
Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows
Header mfobjects.h (include Mfidl.h)
Library Mfuuid.lib

See also

IMFByteStream