IMediaObjectInPlace::GetLatency method (mediaobj.h)
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetLatency method retrieves the latency introduced by this DMO.
Syntax
HRESULT GetLatency(
[out] REFERENCE_TIME *pLatencyTime
);
Parameters
[out] pLatencyTime
Pointer to a variable that receives the latency, in 100-nanosecond units.
Return value
Returns S_OK if successful. Otherwise, returns an HRESULT value indicating the cause of the error.
Remarks
This method returns the average time required to process each buffer. This value usually depends on factors in the run-time environment, such as the processor speed and the CPU load. One possible way to implement this method is for the DMO to keep a running average based on historical data.
Requirements
| Target Platform | Windows |
| Header | mediaobj.h (include Dmo.h) |
| Library | Dmoguids.lib |