CTransformInputPin.CheckMediaType method
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 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 S_OK or another HRESULT value.
Remarks
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.
Requirements
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