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IAsyncReader::SyncRead

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A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This method performs a synchronous read.

Syntax

HRESULT SyncRead(
  LONGLONG llPosition,
  LONG lLength,
  BYTE* pBuffer
);

Parameters

  • llPosition
    [in] Absolute file position.
  • lLength
    [in] Number of bytes required.
  • pBuffer
    [out] Where the data is written.

Return Value

Returns an HRESULT value that depends on the implementation of the interface. Current DirectShow implementation return values include the following.

Value Description

VFW_E_BADALIGN

An invalid alignment was specified.

HRESULT_FROM_WIN32

Microsoft Win32® error.

S_FALSE

Size changed (probably due to end of file).

S_OK

Success.

Remarks

The SyncRead method works in a stopped state as well as in a running state. The read is not necessarily aligned. This method fails if the read is beyond the actual total length.

Requirements

Windows Embedded CE Windows CE 2.12 and later
Windows Mobile Windows Mobile Version 5.0 and later
Note Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements
For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later