mf: Return earlier for clock state change calls when time source is not set.

dlls/mf/session.c

@@ -1923,6 +1923,9 @@ static HRESULT clock_change_state(struct presentation_clock *clock, enum clock_c
     MFTIME system_time;
     HRESULT hr;
 
+    if (!clock->time_source)
+        return MF_E_CLOCK_NO_TIME_SOURCE;
+
     if (command != CLOCK_CMD_SET_RATE && clock->state == states[command] && clock->state != MFCLOCK_STATE_RUNNING)
         return MF_E_CLOCK_STATE_ALREADY_SET;
 

dlls/mf/tests/mf.c

@@ -1501,6 +1501,9 @@ static void test_presentation_clock(void)
     hr = MFCreatePresentationClock(&clock);
     ok(hr == S_OK, "Failed to create presentation clock, hr %#x.\n", hr);
 
+    hr = IMFPresentationClock_QueryInterface(clock, &IID_IMFRateControl, (void **)&rate_control);
+    ok(hr == S_OK, "Failed to get rate control interface, hr %#x.\n", hr);
+
     hr = IMFPresentationClock_GetTimeSource(clock, &time_source);
     ok(hr == MF_E_CLOCK_NO_TIME_SOURCE, "Unexpected hr %#x.\n", hr);
 
@@ -1521,7 +1524,7 @@ static void test_presentation_clock(void)
 
     value = 1;
     hr = IMFPresentationClock_GetContinuityKey(clock, &value);
-    ok(hr == S_OK, "Unexpected hr %#x.\n", hr);
+    ok(hr == S_OK, "Failed to get continuity key, hr %#x.\n", hr);
     ok(value == 0, "Unexpected value %u.\n", value);
 
     hr = IMFPresentationClock_GetProperties(clock, &props);
@@ -1559,6 +1562,19 @@ static void test_presentation_clock(void)
     hr = IMFPresentationClock_RemoveClockStateSink(clock, &test_sink);
     ok(hr == S_OK, "Unexpected hr %#x.\n", hr);
 
+    /* State change commands, time source is not set yet. */
+    hr = IMFPresentationClock_Start(clock, 0);
+    ok(hr == MF_E_CLOCK_NO_TIME_SOURCE, "Unexpected hr %#x.\n", hr);
+
+    hr = IMFPresentationClock_Pause(clock);
+    ok(hr == MF_E_CLOCK_NO_TIME_SOURCE, "Unexpected hr %#x.\n", hr);
+
+    hr = IMFPresentationClock_Stop(clock);
+    ok(hr == MF_E_CLOCK_NO_TIME_SOURCE, "Unexpected hr %#x.\n", hr);
+
+    hr = IMFRateControl_SetRate(rate_control, FALSE, 0.0f);
+    ok(hr == MF_E_CLOCK_NO_TIME_SOURCE, "Unexpected hr %#x.\n", hr);
+
     /* Set default time source. */
     hr = MFCreateSystemTimeSource(&time_source);
     ok(hr == S_OK, "Failed to create time source, hr %#x.\n", hr);
@@ -1631,9 +1647,6 @@ static void test_presentation_clock(void)
 
     IMFPresentationTimeSource_Release(time_source);
 
-    hr = IMFPresentationClock_QueryInterface(clock, &IID_IMFRateControl, (void **)&rate_control);
-    ok(hr == S_OK, "Failed to get rate control interface, hr %#x.\n", hr);
-
     hr = IMFRateControl_GetRate(rate_control, NULL, &rate);
     ok(hr == S_OK, "Failed to get clock rate, hr %#x.\n", hr);