DirectShow控制台输出和保存视频设备名称

#include "windows.h"
#include "TCHAR.h"
#include <dshow.h>
#include <vector>
#include <iostream>
#include <cwctype>

#define MAX_FRIENDLY_NAME_LENGTH    128
#define MAX_MONIKER_NAME_LENGTH     256

typedef struct _TDeviceName
{
WCHAR FriendlyName[MAX_FRIENDLY_NAME_LENGTH];   // 设备友好名
WCHAR MonikerName[MAX_MONIKER_NAME_LENGTH];     // 设备Moniker名
} TDeviceName;

int _tmain(int argc, _TCHAR* argv[])
{
TDeviceName name;
HRESULT hr;

// 初始化
std::vector<TDeviceName> vectorDevices;
vectorDevices.clear();

// 初始化COM
hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
if (FAILED(hr))
{
return hr;
}

// 创建系统设备枚举器实例
ICreateDevEnum *pSysDevEnum = NULL;
hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, (void **)&pSysDevEnum);
if (FAILED(hr))
{
CoUninitialize();
return hr;
}

// 获取设备类枚举器
IEnumMoniker *pEnumCat = NULL;
hr = pSysDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, &pEnumCat, 0);
if (hr == S_OK)
{
// 枚举设备名称
IMoniker *pMoniker = NULL;
ULONG cFetched;
while (pEnumCat->Next(1, &pMoniker, &cFetched) == S_OK)
{
IPropertyBag *pPropBag;
hr = pMoniker->BindToStorage(NULL, NULL, IID_IPropertyBag, (void **)&pPropBag);
if (SUCCEEDED(hr))
{
// 获取设备友好名
VARIANT varName;
VariantInit(&varName);
hr = pPropBag->Read(L"FriendlyName", &varName, NULL);
if (SUCCEEDED(hr))
{
StringCchCopy(name.FriendlyName, MAX_FRIENDLY_NAME_LENGTH, varName.bstrVal);
std::wcout << name.FriendlyName << std::endl;
// 获取设备Moniker名
LPOLESTR pOleDisplayName = reinterpret_cast<LPOLESTR>(CoTaskMemAlloc(MAX_MONIKER_NAME_LENGTH * 2));
if (pOleDisplayName != NULL)
{
hr = pMoniker->GetDisplayName(NULL, NULL, &pOleDisplayName);
if (SUCCEEDED(hr))
{
StringCchCopy(name.MonikerName, MAX_MONIKER_NAME_LENGTH, pOleDisplayName);
vectorDevices.push_back(name);
}
CoTaskMemFree(pOleDisplayName);
}
}
VariantClear(&varName);
pPropBag->Release();
}
pMoniker->Release();
} // End for While
pEnumCat->Release();
}
pSysDevEnum->Release();
CoUninitialize();
}