IMediaObjectImpl::CheckTypesSet

Determines whether all of the non-optional streams have media types.

Syntax

bool CheckTypesSet(void);

Return Value

Returns TRUE if all of the object's non-optional streams have media types. Otherwise, returns FALSE.

Remarks

Call this method after any operation that changes the media type on a stream. This method sets a private flag within the class. Some IMediaObjectImpl methods test this flag to determine whether certain operations are permitted. These methods generally return DMO_E_TYPE_NOT_SET if the flag is FALSE.

The only two methods in IMediaObject that change the media type on a stream are SetInputType and SetOutputType. The class template implements both of these methods.