mf: Slightly improve topoloader Load().

dlls/mf/tests/Makefile.in

 TESTDLL   = mf.dll
-IMPORTS   = mf mfplat mfuuid
+IMPORTS   = mf mfplat mfuuid ole32
 
 C_SRCS = \
 	mf.c
+
+RC_SRCS = resource.rc

dlls/mf/tests/resource.rc

+/*
+ * Copyright 2019 Nikolay Sivov for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include "windef.h"
+
+/* @makedep: test.wav */
+test.wav RCDATA test.wav

dlls/mf/topology.c

@@ -791,6 +791,13 @@ static const IMFTopologyVtbl topologyvtbl =
     topology_GetOutputNodeCollection,
 };
 
+static struct topology *unsafe_impl_from_IMFTopology(IMFTopology *iface)
+{
+    if (!iface || iface->lpVtbl != &topologyvtbl)
+        return NULL;
+    return impl_from_IMFTopology(iface);
+}
+
 static TOPOID topology_generate_id(void)
 {
     TOPOID old;
@@ -1720,9 +1727,44 @@ static ULONG WINAPI topology_loader_Release(IMFTopoLoader *iface)
 static HRESULT WINAPI topology_loader_Load(IMFTopoLoader *iface, IMFTopology *input_topology,
         IMFTopology **output_topology, IMFTopology *current_topology)
 {
+    struct topology *topology = unsafe_impl_from_IMFTopology(input_topology);
+    IMFMediaSink *sink;
+    HRESULT hr;
+    size_t i;
+
     FIXME("%p, %p, %p, %p.\n", iface, input_topology, output_topology, current_topology);
 
-    return E_NOTIMPL;
+    if (current_topology)
+        FIXME("Current topology instance is ignored.\n");
+
+    for (i = 0; i < topology->nodes.count; ++i)
+    {
+        struct topology_node *node = topology->nodes.nodes[i];
+
+        switch (node->node_type)
+        {
+            case MF_TOPOLOGY_OUTPUT_NODE:
+                if (node->object)
+                {
+                    /* Sinks must be bound beforehand. */
+                    if (FAILED(IUnknown_QueryInterface(node->object, &IID_IMFMediaSink, (void **)&sink)))
+                        return MF_E_TOPO_SINK_ACTIVATES_UNSUPPORTED;
+                    IMFMediaSink_Release(sink);
+                }
+                break;
+            case MF_TOPOLOGY_SOURCESTREAM_NODE:
+                if (FAILED(hr = IMFAttributes_GetItem(node->attributes, &MF_TOPONODE_STREAM_DESCRIPTOR, NULL)))
+                    return hr;
+                break;
+            default:
+                ;
+        }
+    }
+
+    if (FAILED(hr = MFCreateTopology(output_topology)))
+        return hr;
+
+    return IMFTopology_CloneFrom(*output_topology, input_topology);
 }
 
 static const IMFTopoLoaderVtbl topologyloadervtbl =

include/mfidl.idl

@@ -76,6 +76,13 @@ typedef enum MFSESSION_GETFULLTOPOLOGY_FLAGS
     MFSESSION_GETFULLTOPOLOGY_CURRENT = 0x00000001,
 } MFSESSION_GETFULLTOPOLOGY_FLAGS;
 
+typedef enum _MF_TOPOLOGY_RESOLUTION_STATUS_FLAGS
+{
+    MF_TOPOLOGY_RESOLUTION_SUCCEEDED            = 0x00000000,
+    MF_OPTIONAL_NODE_REJECTED_MEDIA_TYPE        = 0x00000001,
+    MF_OPTIONAL_NODE_REJECTED_PROTECTED_PROCESS = 0x00000002,
+} MF_TOPOLOGY_RESOLUTION_STATUS_FLAGS;
+
 [
     object,
     uuid(2eb1e945-18b8-4139-9b1a-d5d584818530),