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quartz: Only query for event interface when there is a filtergraph. 

Prevents a null pointer dereference.
This commit is contained in:
Maarten Lankhorst 2008-06-10 18:00:38 +02:00 committed by Alexandre Julliard
parent e8705402a4
commit 3a9040c1f2
1 changed files with 10 additions and 5 deletions
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15
dlls/quartz/nullrenderer.c
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@ -568,16 +568,21 @@ static HRESULT WINAPI NullRenderer_InputPin_EndOfStream(IPin * iface)
{
InputPin* This = (InputPin*)iface;
IMediaEventSink* pEventSink;
HRESULT hr;
IFilterGraph *graph;
HRESULT hr = S_OK;
TRACE("(%p/%p)->()\n", This, iface);
InputPin_EndOfStream(iface);
hr = IFilterGraph_QueryInterface(((NullRendererImpl*)This->pin.pinInfo.pFilter)->filterInfo.pGraph, &IID_IMediaEventSink, (LPVOID*)&pEventSink);
if (SUCCEEDED(hr))
graph = ((NullRendererImpl*)This->pin.pinInfo.pFilter)->filterInfo.pGraph;
if (graph)
{
hr = IMediaEventSink_Notify(pEventSink, EC_COMPLETE, S_OK, 0);
IMediaEventSink_Release(pEventSink);
hr = IFilterGraph_QueryInterface(((NullRendererImpl*)This->pin.pinInfo.pFilter)->filterInfo.pGraph, &IID_IMediaEventSink, (LPVOID*)&pEventSink);
if (SUCCEEDED(hr))
{
hr = IMediaEventSink_Notify(pEventSink, EC_COMPLETE, S_OK, 0);
IMediaEventSink_Release(pEventSink);
}
}
return hr;