mf: Block samplegrabber stream event calls after stream is removed.

dlls/mf/samplegrabber.c

@@ -235,6 +235,9 @@ static HRESULT WINAPI sample_grabber_stream_GetEvent(IMFStreamSink *iface, DWORD
 
     TRACE("%p, %#x, %p.\n", iface, flags, event);
 
+    if (!stream->sink)
+        return MF_E_STREAMSINK_REMOVED;
+
     return IMFMediaEventQueue_GetEvent(stream->event_queue, flags, event);
 }
 
@@ -245,6 +248,9 @@ static HRESULT WINAPI sample_grabber_stream_BeginGetEvent(IMFStreamSink *iface,
 
     TRACE("%p, %p, %p.\n", iface, callback, state);
 
+    if (!stream->sink)
+        return MF_E_STREAMSINK_REMOVED;
+
     return IMFMediaEventQueue_BeginGetEvent(stream->event_queue, callback, state);
 }
 
@@ -255,6 +261,9 @@ static HRESULT WINAPI sample_grabber_stream_EndGetEvent(IMFStreamSink *iface, IM
 
     TRACE("%p, %p, %p.\n", iface, result, event);
 
+    if (!stream->sink)
+        return MF_E_STREAMSINK_REMOVED;
+
     return IMFMediaEventQueue_EndGetEvent(stream->event_queue, result, event);
 }
 
@@ -265,6 +274,9 @@ static HRESULT WINAPI sample_grabber_stream_QueueEvent(IMFStreamSink *iface, Med
 
     TRACE("%p, %u, %s, %#x, %p.\n", iface, event_type, debugstr_guid(ext_type), hr, value);
 
+    if (!stream->sink)
+        return MF_E_STREAMSINK_REMOVED;
+
     return IMFMediaEventQueue_QueueEventParamVar(stream->event_queue, event_type, ext_type, hr, value);
 }
 
@@ -1046,6 +1058,7 @@ static HRESULT WINAPI sample_grabber_sink_Shutdown(IMFMediaSink *iface)
         IMFMediaSink_Release(&grabber->stream->sink->IMFMediaSink_iface);
         EnterCriticalSection(&grabber->stream->cs);
         grabber->stream->sink = NULL;
+        IMFMediaEventQueue_Shutdown(grabber->stream->event_queue);
         LeaveCriticalSection(&grabber->stream->cs);
         IMFStreamSink_Release(&grabber->stream->IMFStreamSink_iface);
         grabber->stream = NULL;

dlls/mf/tests/mf.c

@@ -2162,7 +2162,6 @@ todo_wine
     ok(hr == MF_E_SHUTDOWN, "Unexpected hr %#x.\n", hr);
 
     hr = IMFStreamSink_GetEvent(stream, MF_EVENT_FLAG_NO_WAIT, &event);
-todo_wine
     ok(hr == MF_E_STREAMSINK_REMOVED, "Unexpected hr %#x.\n", hr);
 
     hr = IMFStreamSink_GetMediaSink(stream, &sink2);