Deadlocked in windows filter graph

Question

this is a hard to reproduce bug, but I finally managed to reproduce it. However, I do not have a clear understanding of what might have caused it. I am currently trying to push myself through this bug and figure out the source of error.

Wondering if someone can give me some directions or hints.

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My program is deadlocked in the stop function in Directshow Filter graph.

here is the call stack:

ntdll.dll!_ZwDeviceIoControlFile@40()  + 0x15 bytes 
ntdll.dll!_ZwDeviceIoControlFile@40()  + 0x15 bytes 
KernelBase.dll!_CreateEventExW@16()  + 0x6e bytes   
ksproxy.ax!SetState()  + 0x3e bytes 
ksproxy.ax!Inactive()  + 0x3d bytes 

ksproxy.ax!CKsOutputPin::Inactive() + 0x1d bytes
ksproxy.ax!CKsProxy::Stop() + 0x59 bytes
quartz.dll!CFilterGraph::Stop() + 0x123f3 bytes
quartz.dll!CFGControl::CImplMediaControl::Stop() + 0x12dba bytes <--- Called into direct show *cam.dll!UVCCamera::Shutdown() Line 140 + 0x1b bytes C++ cam.dll!anonymous namespace'::closeCamera(unsigned int hCamera) Line 297 C++ cam.dll!anonymous namespace'::CoreThreadFunc(void * data) Line 916 + 0xb bytes C++ kernel32.dll!@BaseThreadInitThunk@12() + 0x12 bytes
ntdll.dll!__RtlUserThreadStart@8() + 0x27 bytes
ntdll.dll!_RtlUserThreadStart@8() + 0x1b bytes*

Answer 1

I may have solved this problem by using the method described at the end of the link below:

http://social.msdn.microsoft.com/Forums/en-US/windowsdirectshowdevelopment/thread/53563921-6398-491c-999c-3bfaa2f218ca/

Now I am getting a different error!