[PATCH 03/10] mf: Add topoloader_context structure for use in _Load().

[Sergio Gómez Del Real]

Signed-off-by: Sergio Gómez Del Real 
---
 dlls/mf/topology.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/dlls/mf/topology.c b/dlls/mf/topology.c
index a6342c0c4e..4d437e6961 100644
--- a/dlls/mf/topology.c
+++ b/dlls/mf/topology.c
@@ -1935,9 +1935,18 @@ static ULONG WINAPI topology_loader_Release(IMFTopoLoader *iface)
     return refcount;
 }

+struct topoloader_context
+{
+    IMFTopology *input_topology;
+    IMFTopology *output_topology;
+    GUID key;
+    unsigned int marker;
+};
+
 static HRESULT WINAPI topology_loader_Load(IMFTopoLoader *iface, IMFTopology *input_topology,
         IMFTopology **output_topology, IMFTopology *current_topology)
 {
+    struct topoloader_context context = { 0 };
     MF_TOPOLOGY_TYPE node_type;
     IMFTopologyNode *node;
     IMFStreamSink *sink;
@@ -1952,14 +1961,15 @@ static HRESULT WINAPI topology_loader_Load(IMFTopoLoader *iface, IMFTopology *in
         FIXME("Current topology instance is ignored.\n");

if (FAILED(IMFTopology_GetNodeCount(input_topology, &count))
+        || FAILED(MFCreateTopology(&context.output_topology))
         || count < 2)
     {
         hr = MF_E_TOPO_UNSUPPORTED;
         return hr;
     }

-    if (FAILED(hr = MFCreateTopology(output_topology)))
-        return hr;
+    context.input_topology = input_topology;
+    memset(&context.key, 0xff, sizeof(context.key));

i = 0;
     while (SUCCEEDED(IMFTopology_GetNode(input_topology, i++, &node)))
@@ -1973,6 +1983,7 @@ static HRESULT WINAPI topology_loader_Load(IMFTopoLoader *iface, IMFTopology *in
                 /* Sinks must be bound beforehand. */
                 if (FAILED(IUnknown_QueryInterface(object, &IID_IMFStreamSink, (void **)&sink)))
                 {
+                    IMFTopology_Release(context.output_topology);
                     IMFTopologyNode_Release(node);
                     IUnknown_Release(object);
                     hr = MF_E_TOPO_SINK_ACTIVATES_UNSUPPORTED;
@@ -1986,7 +1997,10 @@ static HRESULT WINAPI topology_loader_Load(IMFTopoLoader *iface, IMFTopology *in
         IMFTopologyNode_Release(node);
     }

-    return IMFTopology_CloneFrom(*output_topology, input_topology);
+    if (SUCCEEDED(hr = IMFTopology_CloneFrom(context.output_topology, input_topology)))
+        *output_topology = context.output_topology;
+
+    return hr;
 }

static const IMFTopoLoaderVtbl topologyloadervtbl =