输出Pin是从CSourceStream派生的，我重载了DoBufferProcessingLoop函数
因以原来是FillBuffer返回S_FALSE时会结束运行，我改成返回S_FALSE也继续运行，代码如下
HRESULT CNetOutPin::DoBufferProcessingLoop(void) {

    Command com;

    OnThreadStartPlay();

    do {
while (!CheckRequest(&com)) {

IMediaSample *pSample;

HRESULT hr = GetDeliveryBuffer(&pSample,NULL,NULL,0);
if (FAILED(hr)) {
                Sleep(1);
continue;
}
hr = FillBuffer(pSample);

if (hr == S_OK) {
hr = Deliver(pSample);
                pSample->Release();
                if(hr != S_OK)
                {
                  DbgLog((LOG_TRACE, 2, TEXT("Deliver() returned %08x; stopping"), hr));
                  return S_OK;
                }

} else if (hr == S_FALSE) {
                // 只有这个地方做了修改，如何返回S_FALSE也正常运行，只是不调用Deliver传递数据
pSample->Release();
} else {
                pSample->Release();
DbgLog((LOG_ERROR, 1, TEXT("Error %08lX from FillBuffer!!!"), hr));
                DeliverEndOfStream();
                m_pFilter->NotifyEvent(EC_ERRORABORT, hr, 0);
                return hr;
}
}
if (com == CMD_RUN || com == CMD_PAUSE) {
Reply(NOERROR);
} else if (com != CMD_STOP) {
Reply((DWORD) E_UNEXPECTED);
DbgLog((LOG_ERROR, 1, TEXT("Unexpected command!!!")));
}
    } while (com != CMD_STOP);

    return S_FALSE;
}
结果调用　FilterGraph的StopWhenReady不能正常停止，Stop()可以停止，但随后报错，在GraphEdit中也是这样，怎么办？