停止 directshow 源过滤器时 Flash 崩溃
这是调用堆栈：
0480b000()
vcam.ax!CSourceStream::DoBufferProcessingLoop() + 0xe1 字节
vcam.ax!CSourceStream::ThreadProc() + 0x13e 字节
vcam.ax!CAMThread::InitialThreadProc() + 0x51 字节
kernel32.dll!7c80b713()
调用堆栈来自此线程：
0 > 0x000015b8 Worker Thread CAMThread::InitialThreadProc 0480b000 Normal 0
反汇编代码：
017D0B5B push edx
017D0B5C mov eax,dword ptr [ecx+8]
017D0B5F call eax
017D0B61 cmp esi,esp
017D0B63 call @ILT+2525(__RTC_CheckEsp) (17C49E2h)
017D0B68 cmp dword ptr [ebp-2Ch],0
017D0B6C je CSourceStream::DoBufferProcessingLoop+10Ah (17D0B8Ah)
017D0B6E mov eax,dword ptr [ebp-2Ch]
017D0B5F call eax 行存在问题
大多数 directshow 过滤器都存在此问题，如何修复？
Here's the callstack :
0480b000()
vcam.ax!CSourceStream::DoBufferProcessingLoop() + 0xe1 bytes
vcam.ax!CSourceStream::ThreadProc() + 0x13e bytes
vcam.ax!CAMThread::InitialThreadProc() + 0x51 bytes
kernel32.dll!7c80b713()
The callstack is from this thread:
0 > 0x000015b8 Worker Thread CAMThread::InitialThreadProc 0480b000 Normal 0
disassembly code:
017D0B5B push edx
017D0B5C mov eax,dword ptr [ecx+8]
017D0B5F call eax
017D0B61 cmp esi,esp
017D0B63 call @ILT+2525(__RTC_CheckEsp) (17C49E2h)
017D0B68 cmp dword ptr [ebp-2Ch],0
017D0B6C je CSourceStream::DoBufferProcessingLoop+10Ah (17D0B8Ah)
017D0B6E mov eax,dword ptr [ebp-2Ch]
Problem exists at the line 017D0B5F call eax
This problem exists for most directshow filters ,how to fix?
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我相信 vcam.ax 的源代码位于此处，因此最好的选择可能是编译本地源代码，然后附加到调试器中崩溃的进程。然后，您可以在 DoBufferProcessingLoop() 实现中放置一个断点，重新创建崩溃，您应该能够找出崩溃的原因。
I believe vcam.ax's source code is here, so probably the best option is to compile the source code locally and then attach to the process that's crashing in the debugger. Then you can put a breakpoint in the DoBufferProcessingLoop() implementation, recreate the crash, and you should be able figure out why you're crashing.
我使用过 vcom.ax 并遇到了与您相同的问题。我通过以下步骤解决它。
在以下函数的第一行添加
CAutoLock cAutoLock(&m_cSharedState);：CVCamStream::CVCamStream() //constructorCVCamStream::~CVCamStream() //distructorHRESULT CVCamStream::FillBuffer(IMediaSample *pms)HRESULT CVCamStream::OnThreadCreate()这可能会解决您的问题。
I'v used vcom.ax and encountered the same problem as yours. I solve it by following step.
Add
CAutoLock cAutoLock(&m_cSharedState);on the first Line of following function:CVCamStream::CVCamStream() //constructorCVCamStream::~CVCamStream() //distructorHRESULT CVCamStream::FillBuffer(IMediaSample *pms)HRESULT CVCamStream::OnThreadCreate()This may solve your problem.