Microsoft DirectX 9.0


The get_PrerollTime method retrieves the amount of data that will be queued before the start position.


HRESULT get_PrerollTime(
  REFTIME *pllTime



[out] Pointer to a variable that receives the preroll time, in seconds.

Return Values

Returns an HRESULT value. Possible values include the following.

Value Description
S_OK Success.
E_NOTIMPL Not implemented.
E_POINTER NULL pointer argument.


The preroll is the time prior to the start position at which nonrandom access devices, such as tape players, should start rolling.

If no filter in the graph implements this method, the Filter Graph Manager sets the value of *pllTime to zero and returns S_OK.

See Also