通过DirectShow Api获取系统麦克风、扬声器、摄像头信息
#include <windows.h>
#include <vector>
#include <dshow.h>
#pragma comment(lib, "Strmiids.lib")
#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;
//WCHAR 转换为 Char
char* WCharToChar(WCHAR *s)
{
int w_nlen = WideCharToMultiByte(CP_ACP, 0, s, -1, NULL, 0, NULL, false);
char *ret = new char[w_nlen];
memset(ret, 0, w_nlen);
WideCharToMultiByte(CP_ACP, 0, s, -1, ret, w_nlen, NULL, false);
return ret;
}
//REFGUID guidValue ： CLSID_AudioInputDeviceCategory（麦克风）； CLSID_AudioRendererCategory（扬声器）； //CLSID_VideoInputDeviceCategory（摄像头）
HRESULT GetAudioVideoInputDevices(std::vector<TDeviceName> &vectorDevices, REFGUID guidValue)
{
TDeviceName name;
HRESULT hr;
// 初始化
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(guidValue, &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);
// 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();
return hr;
}
int _tmain(int argc, _TCHAR* argv[])
{
std::vector<TDeviceName> vectorDevices;
vectorDevices.clear();
//获取摄像头信息
GetAudioVideoInputDevices(vectorDevices, CLSID_VideoInputDeviceCategory);
for (auto itor = vectorDevices.begin(); itor != vectorDevices.end(); ++itor)
{
printf("FriendlyName = %s, MonikerName = %s\n", WCharToChar(itor->FriendlyName), WCharToChar(itor->MonikerName));
}
vectorDevices.clear();
//获取麦克风设备信息
GetAudioVideoInputDevices(vectorDevices, CLSID_AudioInputDeviceCategory);
for (auto itor = vectorDevices.begin(); itor != vectorDevices.end(); ++itor)
{
//wprintf(L"FriendlyName = %ws, MonikerName = %ws\n", itor->FriendlyName, itor->MonikerName);
printf("FriendlyName = %s, MonikerName = %s\n", WCharToChar(itor->FriendlyName), WCharToChar(itor->MonikerName));
}
vectorDevices.clear();
//获取扬声器设备信息
GetAudioVideoInputDevices(vectorDevices, CLSID_AudioRendererCategory);
for (auto itor = vectorDevices.begin(); itor != vectorDevices.end(); ++itor)
{
//wprintf(L"FriendlyName = %ws, MonikerName = %ws\n", itor->FriendlyName, itor->MonikerName);
printf("FriendlyName = %s, MonikerName = %s\n", WCharToChar(itor->FriendlyName), WCharToChar(itor->MonikerName));
}
getchar();
return 0;
}
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