IAVIStream
and IAVIFile Interfaces
The IAVIStream and IAVIFile interfaces contain the
methods used by file and stream handlers. The PAVISTREAM data type is a
pointer to an AVI stream object (through the IAVIStream interface) and
the PAVIFILE data type is a pointer to an AVI file object (through the IAVIFile
interface).
To create an
object pointer in C, first allocate space for a structure that is large enough
to contain the pointer to the virtual function table and the other data
members. Create a virtual function table for the methods for your type of
stream, then set the pointer to the virtual function table to the address of
the virtual function table.