VirtualCamera虚拟摄像头相关学习资源

#include "stdafx.h" #include "CameraDS.h" #pragma comment(lib,"Strmiids.lib") ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// class CSampleGrabberCB : public ISampleGrabberCB { public: long lWidth; long lHeight; BOOL bGrabVideo; public: CSampleGrabberCB() { lWidth = 0; lHeight = 0; bGrabVideo = FALSE; } STDMETHODIMP_(ULONG) AddRef() { return 2; } STDMETHODIMP_(ULONG) Release() { return 1; } STDMETHODIMP QueryInterface(REFIID riid, void ** ppv) { if (riid == IID_ISampleGrabberCB || riid == IID_IUnknown) { *ppv = (void *) static_cast<ISampleGrabberCB*>(this); return NOERROR; } return E_NOINTERFACE; } STDMETHODIMP SampleCB(double SampleTime, IMediaSample * pSample) { return 0; } STDMETHODIMP BufferCB(double dblSampleTime, BYTE * pBuffer, long lBufferSize) { if (!pBuffer) return E_POINTER; return 0; } }; CSampleGrabberCB mCB; CCameraDS::CCameraDS() { m_bConnected = false; m_nWidth = 0; m_nHeight = 0; m_bLock = false; m_bChanged = false; // m_pFrame = NULL; m_nBufferSize = 0; m_pNullFilter = NULL; m_pMediaEvent = NULL; m_pSampleGrabberFilter = NULL; m_pGraph = NULL; CoInitialize(NULL); } CCameraDS::~CCameraDS() { CloseCamera(); CoUninitialize(); } void CCameraDS::CloseCamera() { if(m_bConnected) m_pMediaControl->Stop(); m_pGraph = NULL; m_pDeviceFilter = NULL; m_pMediaControl = NULL; m_pSampleGrabberFilter = NULL; m_pSampleGrabber = NULL; m_pGrabberInput = NULL; m_pGrabberOutput = NULL; m_pCameraOutput = NULL; m_pMediaEvent = NULL; m_pNullFilter = NULL; m_pNullInputPin = NULL; //if (m_pFrame) // cvReleaseImage(&m_pFrame); if(!this->m_image.IsNull()) { this->m_image.Destroy(); } m_bConnected = false; m_nWidth = 0; m_nHeight = 0; m_bLock = false; m_bChanged = false; m_nBufferSize = 0; } bool CCameraDS::OpenCamera(int nCamID, bool bDisplayProperties, int nWidth, int nHeight) { HRESULT hr = S_OK; CoInitialize(NULL); // Create the Filter Graph Manager. hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC, IID_IGraphBuilder, (void **)&m_pGraph); hr = CoCreateInstance(CLSID_SampleGrabber, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (LPVOID *)&m_pSampleGrabberFilter); hr = m_pGraph->QueryInterface(IID_IMediaControl, (void **) &m_pMediaControl); hr = m_pGraph->QueryInterface(IID_IMediaEvent, (void **) &m_pMediaEvent); hr = CoCreateInstance(CLSID_NullRenderer, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (LPVOID*) &m_pNullFilter); hr = m_pGraph->AddFilter(m_pNullFilter, L"NullRenderer"); hr = m_pSampleGrabberFilter->QueryInterface(IID_ISampleGrabber, (void**)&m_pSampleGrabber); AM_MEDIA_TYPE mt; ZeroMemory(&mt, sizeof(AM_MEDIA_TYPE)); mt.majortype = MEDIATYPE_Video; mt.subtype = MEDIASUBTYPE_RGB24; mt.formattype = FORMAT_VideoInfo; hr = m_pSampleGrabber->SetMediaType(&mt);