mf: Add support for clock sink notifications.

dlls/mf/tests/mf.c

@@ -826,6 +826,9 @@ static void test_presentation_clock(void)
         { CLOCK_STOP, MFCLOCK_STATE_STOPPED, MFCLOCK_STATE_STOPPED },
         { CLOCK_STOP, MFCLOCK_STATE_STOPPED, MFCLOCK_STATE_STOPPED, MF_E_CLOCK_STATE_ALREADY_SET },
         { CLOCK_PAUSE, MFCLOCK_STATE_STOPPED, MFCLOCK_STATE_STOPPED, MF_E_INVALIDREQUEST },
+        { CLOCK_START, MFCLOCK_STATE_RUNNING, MFCLOCK_STATE_RUNNING },
+        { CLOCK_PAUSE, MFCLOCK_STATE_PAUSED, MFCLOCK_STATE_PAUSED },
+        { CLOCK_START, MFCLOCK_STATE_RUNNING, MFCLOCK_STATE_RUNNING },
     };
     IMFClockStateSink test_sink = { &test_clock_sink_vtbl };
     IMFPresentationTimeSource *time_source;

include/mfidl.idl

@@ -412,6 +412,8 @@ interface IMFPresentationTimeSource : IMFClock
     HRESULT GetUnderlyingClock([out] IMFClock **clock);
 }
 
+cpp_quote("#define PRESENTATION_CURRENT_POSITION 0x7fffffffffffffff")
+
 [
     object,
     uuid(868ce85c-8ea9-4f55-ab82-b009a910a805)