Microsoft DirectX 9.0


The CheckMediaType method determines if the pin accepts a specific media type.


HRESULT CheckMediaType(
    const CMediaType *mtIn



Pointer to a CMediaType object that contains the proposed media type.

Return Value

Returns an HRESULT value. Possible values include the following.

Value Description
S_OK Success.
E_INVALIDARG The filter's input pin is not connected.


This method implements the pure virtual CBasePin::CheckMediaType method. The method fails if the filter's input pin is not connected. Otherwise, it calls the filter's CTransformFilter::CheckTransform method, which is also pure virtual. The filter's derived class must implement CheckTransform, which determines if the proposed output media type is compatible with the input media type.

See Also

CTransformOutputPin Class