DirectShow之设备枚举器

//本机环境：vs2013+编译好的：BaseClasses

一.新建项目---配置

新建Win32项目->Unicode配置->删除_tWinMain自动生成代码即可！

二.引入头文件目录

 

三.引入库文件目录

四.导入头文件

五.枚举音频设备友好名（视频同理）

// DirectShowEnumDevice.cpp : 定义应用程序的入口点。
//
 
#include "stdafx.h"
#include "DirectShowEnumDevice.h"
#include <string>
 
using namespace std;
 
int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
    _In_opt_ HINSTANCE hPrevInstance,
    _In_ LPTSTR    lpCmdLine,
    _In_ int       nCmdShow)
{
    //CLSID_SystemDeviceEnum -> IID_ICreateDevEnum
    //IID_ICreateDevEnum + CLSID_AudioInputDeviceCategory -> IEnumMoniker
    //IEnumMoniker -> while -> IMoniker -> IPropertyBag -> Read -> FriendlyName
    //                                    -> IBaseFilter
    //
    
    HRESULT hr = ::CoInitialize(NULL);
    if (FAILED(hr))
    {
        MessageBox(NULL, L"CoInitialize failed!", L"FailedMessageBox",NULL);
        return 0;
    }
 
    //创建系统枚举器
    ICreateDevEnum* pEnumDeviceEnum = NULL;
    hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, (void**)&pEnumDeviceEnum);
    if (FAILED(hr))
    {
        MessageBox(NULL, L"CLSID_SystemDeviceEnum failed!", L"FailedMessageBox", NULL);
        return 0;
    }
    //创建设备枚举器
    IEnumMoniker* pEnumMoniker = NULL;
    hr = pEnumDeviceEnum->CreateClassEnumerator(CLSID_AudioInputDeviceCategory, &pEnumMoniker, 0);
    if (SUCCEEDED(hr))
    {
        //枚举Moniker
        IMoniker* pMoniker = NULL;
        IBaseFilter* pDeviceFilter = NULL;
        ULONG ulCelt;
        while (pEnumMoniker->Next(1, &pMoniker, &ulCelt) == S_OK)
        {
            //设备属性信息
            IPropertyBag* pPropertyBag = NULL;
            hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, (void**)&pPropertyBag);
            if (SUCCEEDED(hr))
            {                
                VARIANT varName;
                VariantInit(&varName); //初始化
                //获取友好名
                hr = pPropertyBag->Read(L"FriendlyName", &varName, 0);
                if (SUCCEEDED(hr))
                {                    
                    wstring strFriendlyName = varName.bstrVal;
                    MessageBox(NULL, strFriendlyName.c_str(), L"FriendlyNameMessageBox", NULL);
                }
                VariantClear(&varName); //清理
                //IMoniker -> CreateDiviceFilter
                hr = pMoniker->BindToObject(NULL, NULL, IID_IBaseFilter, (void**)pDeviceFilter);
                if (FAILED(hr))
                {
                    MessageBox(NULL, L"IMoniker IID_IBaseFilter failed!", L"FailedMessageBox", NULL);
                    continue;
                }
                MessageBox(NULL, L"IMoniker IID_IBaseFilter sucess!", L"SucessMessageBox", NULL);
                pDeviceFilter->Release();
            }
            pPropertyBag->Release();
        }
        pMoniker->Release();        
    }
    pEnumMoniker->Release();
    pEnumDeviceEnum->Release();
 
    CoUninitialize();
    system("pause");
    return 0;
}