MFTIME
定义 100 纳秒的单位。
typedef LONGLONG MFTIME;
const MFTIME ONE_SECOND = 10000000; // One second.
const LONG ONE_MSEC = 1000; // One millisecond
// Convert 100-nanosecond units to milliseconds.
inline LONG MFTimeToMsec(const LONGLONG& time)
{
return (LONG)(time / (ONE_SECOND / ONE_MSEC));
}
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