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CBaseInputPin::CheckStreaming (Windows Embedded CE 6.0)

1/6/2010

Verifies conditions for continuing with a streaming operation.

Syntax

virtual HRESULT CheckStreaming( );

Parameters

None.

Return Value

Returns one of the following HRESULT values, depending on the state.

Value Description

S_FALSE

Currently in flushing state.

S_OK

Receive or EndOfStream operations can safely proceed.

VFW_E_RUNTIME_ERROR

Run-time error occurred while processing a previous sample.

VFW_E_WRONG_STATE

Filter is in the State_Stopped state.

Remarks

Conditions checked in this member function include whether the filter is connected, if it is in an active state, if it is not currently flushing data, and if it has not just issued a run-time error. If all these conditions pass, it returns S_OK.

You can override this member function to add restrictions defined by your derived class. The overriding member function should call this base class implementation to check for conditions here as well.

This function member should be called from any override of the CBaseInputPin::Receive or CBasePin::EndOfStream member function (or they should do some equivalent check).

Requirements

Windows Embedded CE Windows CE 2.12 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

See Also

Reference

CBaseInputPin Class