82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
// LowLevelAudio.cpp : This file contains the 'main' function. Program execution begins and ends there.
|
|
//
|
|
|
|
#include "Mmdeviceapi.h"
|
|
#include "Functiondiscoverykeys_devpkey.h"
|
|
#include <iostream>
|
|
|
|
const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator);
|
|
const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator);
|
|
|
|
int main()
|
|
{
|
|
CoInitialize(nullptr);
|
|
IMMDeviceEnumerator* pEnumerator = nullptr;
|
|
IMMDeviceCollection* pDeviceCollection = nullptr;
|
|
HRESULT hr = S_OK;
|
|
|
|
hr = CoCreateInstance(CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL,
|
|
IID_IMMDeviceEnumerator, (void**)& pEnumerator);
|
|
if (!pEnumerator)
|
|
{
|
|
std::cout << "Failed to populate enumerator" << std::endl;
|
|
return 0;
|
|
}
|
|
|
|
hr = pEnumerator->EnumAudioEndpoints(eRender, DEVICE_STATE_ACTIVE, &pDeviceCollection);
|
|
UINT count;
|
|
hr = pDeviceCollection->GetCount(&count);
|
|
if (count == 0)
|
|
{
|
|
std::cout << "No devices found\n";
|
|
}
|
|
// Each loop prints the name of an endpoint device.
|
|
IMMDevice* pEndpoint = nullptr;
|
|
IPropertyStore* pProps = nullptr;
|
|
LPWSTR pwszID = nullptr;
|
|
for (ULONG i = 0; i < count; i++)
|
|
{
|
|
// Get pointer to endpoint number i.
|
|
hr = pDeviceCollection->Item(i, &pEndpoint);
|
|
|
|
// Get the endpoint ID string.
|
|
hr = pEndpoint->GetId(&pwszID);
|
|
hr = pEndpoint->OpenPropertyStore(STGM_READ, &pProps);
|
|
|
|
PROPVARIANT varName;
|
|
// Initialize container for property value.
|
|
PropVariantInit(&varName);
|
|
|
|
// Get the endpoint's friendly-name property.
|
|
hr = pProps->GetValue(PKEY_Device_FriendlyName, &varName);
|
|
|
|
// Print endpoint friendly name and endpoint ID.
|
|
std::cout << "Endpoint: " << i << " " << varName.pwszVal << " " << pwszID << std::endl;
|
|
CoTaskMemFree(pwszID);
|
|
pwszID = nullptr;
|
|
|
|
PropVariantClear(&varName);
|
|
if (pProps)
|
|
{
|
|
pProps->Release();
|
|
pProps = nullptr;
|
|
}
|
|
if (pEndpoint)
|
|
{
|
|
pEndpoint->Release();
|
|
pEndpoint = nullptr;
|
|
}
|
|
}
|
|
if (pEnumerator)
|
|
{
|
|
pEnumerator->Release();
|
|
pEnumerator = nullptr;
|
|
}
|
|
if (pDeviceCollection)
|
|
{
|
|
pDeviceCollection->Release();
|
|
pDeviceCollection = nullptr;
|
|
}
|
|
return 0;
|
|
}
|
|
|