如何遍历 Windows 摄像头设备？

时间：2023-03-09 06:56:47
如何遍历 Windows 摄像头设备？ 
#include <stdlib.h>

#include <iostream>

#include <Windows.h>

#include <comdef.h>

#include <string>

#include <DShow.h>

#pragma   comment(lib,"Strmiids.lib")

//#include <uuids.h>

//#include <strmif.h>

int main()

{

	ICreateDevEnum *pDevEnum = NULL;

	IEnumMoniker *pEnum = NULL;

	HRESULT hr = NULL;

	CoInitialize(NULL);

	hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, reinterpret_cast<void**>(&pDevEnum));

	if (SUCCEEDED(hr))

	{

		hr = pDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory,&pEnum,0);

		if (hr == S_OK)

		{

			//枚举捕获设备

			IMoniker *pMoniker = NULL;

			ULONG cFetched;

			while (pEnum->Next(1, &pMoniker, &cFetched) == S_OK)

			{

				IPropertyBag* pPropBag;

				hr = pMoniker->BindToStorage(0,0,IID_IPropertyBag,reinterpret_cast<void**>(&pPropBag));

				if (SUCCEEDED(hr))

				{

					//获取 vid 和 pid

					BSTR devicePath = NULL;

					hr = pMoniker->GetDisplayName(NULL, NULL, &devicePath);

					if (!SUCCEEDED(hr))

					{

						pMoniker->Release();

						continue;

					}

					wchar_t* lpszDevicePath = _bstr_t(devicePath);

					//获取设备名称

					VARIANT varName;

					varName.vt = VT_BSTR;

					VariantInit(&varName);

					hr = pPropBag->Read(L"FriendlyName", &varName, 0);

					if (SUCCEEDED(hr))

					{

						wchar_t* lpszBSTR = _bstr_t(varName.bstrVal);

						std::wcout << std::wstring(lpszDevicePath) << std::endl;

						std::wcout << std::wstring(lpszBSTR) << std::endl;

					}

					pPropBag->Release();

				}

				pMoniker->Release();

			}

		}

	}

	CoUninitialize();

	system("pause");

    return 0;

}
/***********************************************************************************************************

通过 QueryInterface 函数判断组件是否支持某个特定的接口

***********************************************************************************************************/

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