amstream: Create ddraw if no source object was specified in ddraw_IAMMediaStream_Initialize().

dlls/amstream/ddrawstream.c

@@ -218,6 +218,13 @@ static HRESULT WINAPI ddraw_IAMMediaStream_Initialize(IAMMediaStream *iface, IUn
             && FAILED(hr = IUnknown_QueryInterface(source_object, &IID_IDirectDraw, (void **)&stream->ddraw)))
         FIXME("Stream object doesn't implement IDirectDraw interface, hr %#x.\n", hr);
 
+    if (!source_object)
+    {
+        if (FAILED(hr = DirectDrawCreate(NULL, &stream->ddraw, NULL)))
+            return hr;
+        IDirectDraw_SetCooperativeLevel(stream->ddraw, NULL, DDSCL_NORMAL);
+    }
+
     return S_OK;
 }
 
@@ -381,13 +388,10 @@ static HRESULT WINAPI ddraw_IDirectDrawMediaStream_GetDirectDraw(IDirectDrawMedi
     if (!ddraw)
         return E_POINTER;
 
-    *ddraw = NULL;
     if (!stream->ddraw)
     {
-        HRESULT hr = DirectDrawCreate(NULL, &stream->ddraw, NULL);
-        if (FAILED(hr))
-            return hr;
-        IDirectDraw_SetCooperativeLevel(stream->ddraw, NULL, DDSCL_NORMAL);
+        *ddraw = NULL;
+        return S_OK;
     }
 
     IDirectDraw_AddRef(stream->ddraw);

dlls/amstream/tests/amstream.c

@@ -4803,8 +4803,7 @@ static void test_ddrawstream_getsetdirectdraw(void)
 
     hr = IDirectDrawMediaStream_GetDirectDraw(ddraw_stream, &ddraw3);
     ok(hr == S_OK, "Got hr %#x.\n", hr);
-    todo_wine ok(ddraw3 == NULL, "Expected NULL, got %p.\n", ddraw3);
-    if (ddraw3) IDirectDraw_Release(ddraw3);
+    ok(ddraw3 == NULL, "Expected NULL, got %p.\n", ddraw3);
 
     hr = IDirectDrawMediaStream_SetDirectDraw(ddraw_stream, ddraw2);
     ok(hr == S_OK, "Got hr %#x.\n", hr);