CRendererInputPin.QueryId method

  • Article

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The QueryId method retrieves the pin identifier. This method overrides the CBasePin::QueryId method.

Syntax

HRESULT QueryId(
   LPWSTR *Id
);

Parameters

Id

Receives a string containing the pin identifier.

Return value

Returns one of the HRESULT values shown in the following table.

Return code Description
S_OK
 Success
E_OUTOFMEMORY
 Insufficient memory
E_POINTER
 NULL pointer argument

Remarks

This method allocates the wide-character string "In" and assigns it to the Id parameter. The caller must free the allocated memory, using the CoTaskMemFree function.

Requirements

Requirement Value
Header
Renbase.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

See also

CRendererInputPin Class