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CTransformOutputPin::CheckMediaType

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Microsoft DirectShow 9.0

CTransformOutputPin::CheckMediaType

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.

Requirements

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

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

See Also

CTransformOutputPin Class