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Estimates the standard deviation in milliseconds between when each frame is due and when it is actually rendered, for per-frame statistics.
HRESULT GetStdDev( int nSamples , int *piResult , LONGLONG llSumSq , LONGLONG iTot );
Parameters
- nSamples
- Integer value that contains the number of video samples received by the video renderer.
- piResult
- Pointer to an integer value that will contain the standard deviation.
- llSumSq
- Value that represents the standard deviation, in milliseconds, of all rendered video samples. The lower the value, the more consistent the rendering.
- iTot
- Value that represents the mean value, in milliseconds, between
the stamped time and rendered time for all rendered video samples.
Return Values
Returns NOERROR.