mfmediaengine: Use extension object in CanPlayType().

dlls/mfmediaengine/main.c

@@ -1705,17 +1705,25 @@ static HRESULT WINAPI media_engine_Load(IMFMediaEngineEx *iface)
     return hr;
 }
 
-static HRESULT WINAPI media_engine_CanPlayType(IMFMediaEngineEx *iface, BSTR type, MF_MEDIA_ENGINE_CANPLAY *answer)
+static HRESULT WINAPI media_engine_CanPlayType(IMFMediaEngineEx *iface, BSTR mime_type, MF_MEDIA_ENGINE_CANPLAY *answer)
 {
     struct media_engine *engine = impl_from_IMFMediaEngineEx(iface);
     HRESULT hr = E_NOTIMPL;
 
-    FIXME("(%p, %s, %p): stub.\n", iface, debugstr_w(type), answer);
+    TRACE("%p, %s, %p.\n", iface, debugstr_w(mime_type), answer);
 
     EnterCriticalSection(&engine->cs);
 
     if (engine->flags & FLAGS_ENGINE_SHUT_DOWN)
         hr = MF_E_SHUTDOWN;
+    else
+    {
+        FIXME("Check builtin supported types.\n");
+
+        if (engine->extension)
+             hr = IMFMediaEngineExtension_CanPlayType(engine->extension, !!(engine->flags & MF_MEDIA_ENGINE_AUDIOONLY),
+                     mime_type, answer);
+    }
 
     LeaveCriticalSection(&engine->cs);
 

dlls/mfmediaengine/tests/mfmediaengine.c

@@ -2495,7 +2495,6 @@ static void test_media_extension(void)
 
     mime = SysAllocString(L"doesnotexist");
     hr = IMFMediaEngine_CanPlayType(media_engine, mime, &answer);
-    todo_wine
     ok(hr == 0x80001234, "Unexpected hr %#lx.\n", hr);
     SysFreeString(mime);