opencv 枚举机器所有摄像头！！

ゞ浴缸里的玫瑰 2023-06-08 07:00 1阅读 0赞

// ----------------------------------------------------------------------
    // Our static function for finding num devices available etc
    // 摘自cap_dshow.cpp 文件
    // ----------------------------------------------------------------------
    
    int videoInput::listDevices(bool silent){
    
        //COM Library Intialization
        comInit();
    
        if(!silent)printf("\nVIDEOINPUT SPY MODE!\n\n");
    
    
        ICreateDevEnum *pDevEnum = NULL;
        IEnumMoniker *pEnum = NULL;
        int deviceCounter = 0;
    
        HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
            CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,
            reinterpret_cast<void**>(&pDevEnum));
    
    
        if (SUCCEEDED(hr))
        {
            // Create an enumerator for the video capture category.
            hr = pDevEnum->CreateClassEnumerator(
                CLSID_VideoInputDeviceCategory,
                &pEnum, 0);
    
           if(hr == S_OK){
    
                 if(!silent)printf("SETUP: Looking For Capture Devices\n");
                IMoniker *pMoniker = NULL;
    
                while (pEnum->Next(1, &pMoniker, NULL) == S_OK){
    
                    IPropertyBag *pPropBag;
                    hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag,
                        (void**)(&pPropBag));
    
                    if (FAILED(hr)){
                        pMoniker->Release();
                        continue;  // Skip this one, maybe the next one will work.
                    }
    
    
                     // Find the description or friendly name.
                    VARIANT varName;
                    VariantInit(&varName);
                    hr = pPropBag->Read(L"Description", &varName, 0);
    
                    if (FAILED(hr)) hr = pPropBag->Read(L"FriendlyName", &varName, 0);
    
                    if (SUCCEEDED(hr)){
    
                        hr = pPropBag->Read(L"FriendlyName", &varName, 0);
    
                        int count = 0;
                        int maxLen = sizeof(deviceNames[0])/sizeof(deviceNames[0][0]) - 2;
                        while( varName.bstrVal[count] != 0x00 && count < maxLen) {
                            deviceNames[deviceCounter][count] = (char)varName.bstrVal[count];
                            count++;
                        }
                        deviceNames[deviceCounter][count] = 0;
    
                        if(!silent)printf("SETUP: %i) %s \n",deviceCounter, deviceNames[deviceCounter]);
                    }
    
                    pPropBag->Release();
                    pPropBag = NULL;
    
                    pMoniker->Release();
                    pMoniker = NULL;
    
                    deviceCounter++;
                }
    
                pDevEnum->Release();
                pDevEnum = NULL;
    
                pEnum->Release();
                pEnum = NULL;
            }
    
             if(!silent)printf("SETUP: %i Device(s) found\n\n", deviceCounter);
        }
    
        comUnInit();
    
        return deviceCounter;
    }