| Microsoft DirectX 9.0 |
The CheckMediaType method determines if the pin accepts a specific media type.
Syntax
HRESULT CheckMediaType(
const CMediaType *mtIn
);
Parameters
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. |
Remarks
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