Brew MP 1.0.2
This function retrieves the speed of the specified cached linear movement
determined by the observer.
[in] Pointer to the IObserver interface object.
[in] Index of the linear movement, starting from the last as 0th index.
[out] The speed of the linear movement in pixel/sec.
int IObserver_GetLMCacheSpeed(IObserver *pif, int nIdx, int *pnSpeed);
AEE_SUCCESS - If the speed was retrieved.
AEE_EFAILED - If the speed was not retrieved.