Waits until @clock is synced for reporting the current time. If @timeout
is %GST_CLOCK_TIME_NONE it will wait forever, otherwise it will time out
after @timeout nanoseconds.
For asynchronous waiting, the GstClock::synced signal can be used.
This returns immediately with TRUE if GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC
is not set on the clock, or if the clock is already synced.
Waits until @clock is synced for reporting the current time. If @timeout is %GST_CLOCK_TIME_NONE it will wait forever, otherwise it will time out after @timeout nanoseconds.
For asynchronous waiting, the GstClock::synced signal can be used.
This returns immediately with TRUE if GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC is not set on the clock, or if the clock is already synced.