quartz: Enumerate all the pins on filter and check directions when rendering.

dlls/quartz/filtergraph.c

@@ -1318,7 +1318,7 @@ static HRESULT WINAPI FilterGraph2_Render(IFilterGraph2 *iface, IPin *ppinOut)
             GUID clsid;
             IPin* ppinfilter;
             IBaseFilter* pfilter = NULL;
-            IEnumPins* penumpins;
+            IEnumPins* penumpins = NULL;
             ULONG pin;
 
             hr = GetFilterInfo(pMoniker, &clsid, &var);
@@ -1348,18 +1348,28 @@ static HRESULT WINAPI FilterGraph2_Render(IFilterGraph2 *iface, IPin *ppinOut)
                 WARN("Splitter Enumpins (%x)\n", hr);
                 goto error;
             }
-            hr = IEnumPins_Next(penumpins, 1, &ppinfilter, &pin);
-            IEnumPins_Release(penumpins);
-            if (FAILED(hr)) {
-                WARN("Next (%x)\n", hr);
-                goto error;
-            }
+
+            while ((hr = IEnumPins_Next(penumpins, 1, &ppinfilter, &pin)) == S_OK)
+            {
+                PIN_DIRECTION dir;
+
                 if (pin == 0) {
                     WARN("No Pin\n");
                     hr = E_FAIL;
                     goto error;
                 }
 
+                hr = IPin_QueryDirection(ppinfilter, &dir);
+                if (FAILED(hr)) {
+                    IPin_Release(ppinfilter);
+                    WARN("QueryDirection failed (%x)\n", hr);
+                    goto error;
+                }
+                if (dir != PINDIR_INPUT) {
+                    IPin_Release(ppinfilter);
+                    continue; /* Wrong direction */
+                }
+
                 /* Connect the pin to the "Renderer" */
                 hr = IPin_Connect(ppinOut, ppinfilter, NULL);
                 IPin_Release(ppinfilter);
@@ -1379,9 +1389,20 @@ static HRESULT WINAPI FilterGraph2_Render(IFilterGraph2 *iface, IPin *ppinOut)
                 }
                 IBaseFilter_Release(pfilter);
                 break;
+            }
+            if (SUCCEEDED(hr)) {
+                IEnumPins_Release(penumpins);
+                break; /* out of IEnumMoniker_Next loop */
+            }
+
+            /* IEnumPins_Next failed, all other failure case caught by goto error */
+            WARN("IEnumPins_Next (%x)\n", hr);
+            /* goto error */
 
 error:
             VariantClear(&var);
+            if (penumpins)
+                IEnumPins_Release(penumpins);
             if (pfilter) {
                 IFilterGraph2_RemoveFilter(iface, pfilter);
                 IBaseFilter_Release(pfilter);