显示windows的音频的输入输出设备
#include "stdafx.h" /************************音频的输入输出设备**************************/ #include <Mmdeviceapi.h> #include <Functiondiscoverykeys_devpkey.h> #include <locale.h> #define EXIT_ON_ERROR(hres) \ if (FAILED(hres)) { goto Exit; } #define SAFE_RELEASE(punk) \ if ((punk) != NULL) \ { (punk)->Release(); (punk) = NULL; } const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator); const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator); void PrintEndpointNames() { HRESULT hr = S_OK; IMMDeviceEnumerator *pEnumerator = NULL; IMMDeviceCollection *pRenderCollection = NULL; IMMDeviceCollection *pCaptureCollection = NULL; IMMDevice *pEndpoint = NULL; IPropertyStore *pProps = NULL; LPWSTR pwszID = NULL; hr = CoCreateInstance( CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL, IID_IMMDeviceEnumerator, (void**)&pEnumerator); EXIT_ON_ERROR(hr) //switch eRender or eCapture hr = pEnumerator->EnumAudioEndpoints( eCapture, DEVICE_STATE_ACTIVE, &pRenderCollection); EXIT_ON_ERROR(hr) UINT count; hr = pRenderCollection->GetCount(&count); EXIT_ON_ERROR(hr) if (count == 0) { printf("No endpoints found.\n"); } // Each loop prints the name of an endpoint device. for (ULONG i = 0; i < count; i++) { // Get pointer to endpoint number i. hr = pRenderCollection->Item(i, &pEndpoint); EXIT_ON_ERROR(hr) // Get the endpoint ID string. hr = pEndpoint->GetId(&pwszID); EXIT_ON_ERROR(hr) hr = pEndpoint->OpenPropertyStore( STGM_READ, &pProps); EXIT_ON_ERROR(hr) PROPVARIANT varName; // Initialize container for property value. PropVariantInit(&varName); // Get the endpoint's friendly-name property. hr = pProps->GetValue( PKEY_Device_FriendlyName, &varName); EXIT_ON_ERROR(hr) setlocale(LC_ALL, "chs");//中文宽字符输出 // Print endpoint friendly name and endpoint ID. wprintf(L"Endpoint %d: \"%s\" ( %s )\n", i, varName.pwszVal, pwszID); CoTaskMemFree(pwszID); pwszID = NULL; PropVariantClear(&varName); SAFE_RELEASE(pProps) SAFE_RELEASE(pEndpoint) } SAFE_RELEASE(pEnumerator) SAFE_RELEASE(pRenderCollection) return; Exit: printf("Error!\n"); CoTaskMemFree(pwszID); SAFE_RELEASE(pEnumerator) SAFE_RELEASE(pRenderCollection) SAFE_RELEASE(pEndpoint) SAFE_RELEASE(pProps) } /************************音频的输入输出设备**************************/ int _tmain(int argc, _TCHAR* argv[]) { CoInitializeEx(NULL, COINIT_MULTITHREADED); PrintEndpointNames(); getchar(); return 0; }