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During the pin connection, the CTransformInputPin::CheckMediaTypemember function of the input pin is called to determine whether the proposed media type is acceptable. The CTransformInputPin::CheckMediaTypemember function is implemented to call the CheckInputTypemember function of the derived filter class with the media type. You must implement this to accommodate the media types your filter can handle. The following code sample outlines part of the CGargle::CheckInputTypemember function, which rejects any media type but MEDIATYPE_Audio.
HRESULT CGargle::CheckInputType(const CMediaType
*pmt) { ... // Reject non-Audio type if (pmt->majortype !=
MEDIATYPE_Audio) { return E_INVALIDARG; }
Last updated on Tuesday, May 18, 2004