怎么查系统所有的dshow filter答:HRESULT CreateCaptureBuffer(LPDIRECTSOUNDCAPTURE8 pDSC, LPDIRECTSOUNDCAPTUREBUFFER8* ppDSCB8) { HRESULT hr; DSCBUFFERDESC dscbd; LPDIRECTSOUNDCAPTUREBUFFER pDSCB; WAVEFORMATEX wfx ={WAVE_FORMAT_PCM, 2, 44100, 176400, 4, 16, 0}; // wFormatTag, nChannels, nSamplesPerSec, mAvgBytesPerSec, /...