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 S_OK or another HRESULT value.


This method implements the pure virtual CBasePin::CheckMediaType method. It calls the filter's CTransformFilter::CheckInputType method, which is also pure virtual. The filter's derived class must implement CheckInputType to determine whether a given input type is acceptable.

If the filter's output pin is connected, this method also calls the filter's CTransformFilter::CheckTransform method to determine whether the input type is compatible with the output type. The CheckTransform method is pure virtual as well.

See Also

CTransformInputPin Class