Miscellaneous Helper Functions

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 following are miscellaneous helper functions.

Function	Description
EqualPins	Checks if two pins are on the same object.
Int64x32Div32	Implements the formula ((a*b)+rnd)/c where a is a 64-bit value and b, c, and rnd are 32-bit values.
IsEqualObject	Checks if two interfaces are on the same object.
llMulDiv	Implements the formula ((a*b)+rnd)/c where each term is a 64-bit value.
WaitDispatchingMessages	Waits for an object to be signaled, while dispatching window messages.