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CBasePin::ConnectionMediaType

  • Articolo
 
Microsoft DirectShow 9.0

CBasePin::ConnectionMediaType

The ConnectionMediaType method retrieves the media type for the current pin connection, if any. This method implements the IPin::ConnectionMediaType method.

Syntax

  HRESULT ConnectionMediaType(
    AM_MEDIA_TYPE *pmt
);

Parameters

pmt

Pointer to an AM_MEDIA_TYPE structure that receives the media type.

Return Value

Returns an HRESULT value. Possible values include those in the following table.

Value Description
S_OK Success.
E_POINTER Null pointer argument.
VFW_E_NOT_CONNECTED Pin is not connected.

Remarks

If the pin is connected, this method copies the media type into the AM_MEDIA_TYPE structure specified by pmt. The caller must free the media type's format block. You can use the Microsoft® Win32® CoTaskMemFree function, or the FreeMediaType helper function.

If the pin is not connected, this method zeroes the memory block specified by pmt and returns an error code.

Requirements

**  Header:** Declared in Amfilter.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

See Also