HRESULT
WasapiWrap::DoDeviceEnumeration(void)
{
HRESULT hr = 0;
IMMDeviceEnumerator *deviceEnumerator = nullptr;
m_deviceInfo.clear();
HRR(CoCreateInstance(__uuidof(MMDeviceEnumerator),
nullptr, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&deviceEnumerator)));
HRR(deviceEnumerator->EnumAudioEndpoints(
eRender, DEVICE_STATE_ACTIVE, &m_deviceCollection));
UINT nDevices = 0;
HRG(m_deviceCollection->GetCount(&nDevices));
for (UINT i = 0; i<nDevices; ++i) {
wchar_t name[WW_DEVICE_NAME_COUNT];
HRG(DeviceNameGet(m_deviceCollection, i, name, sizeof name));
m_deviceInfo.push_back(WWDeviceInfo(i, name));
}
end:
SafeRelease(&deviceEnumerator);
return hr;
}
HRESULT
WWAudioDeviceEnumerator::BuildDeviceList(WWDeviceType t)
{
HRESULT hr = 0;
switch (t) {
case WWDTPlay:
m_dataFlow = eRender;
break;
case WWDTRec:
m_dataFlow = eCapture;
break;
default:
assert(0);
return E_FAIL;
}
HRR(CoCreateInstance(__uuidof(MMDeviceEnumerator), nullptr, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&m_deviceEnumerator)));
if (m_deviceEnumerator) {
for (auto it = m_notificationClientList.begin();
it != m_notificationClientList.end(); ++it) {
m_deviceEnumerator->RegisterEndpointNotificationCallback(*it);
}
}
HRR(m_deviceEnumerator->EnumAudioEndpoints(m_dataFlow, DEVICE_STATE_ACTIVE, &m_deviceCollection));
UINT nDevices = 0;
HRG(m_deviceCollection->GetCount(&nDevices));
for (UINT i=0; i<nDevices; ++i) {
wchar_t name[WW_DEVICE_NAME_COUNT];
wchar_t idStr[WW_DEVICE_IDSTR_COUNT];
HRG(DeviceNameGet(m_deviceCollection, i, name, sizeof name));
HRG(DeviceIdStringGet(m_deviceCollection, i, idStr, sizeof idStr));
m_deviceInfo.push_back(WWDeviceInfo(i, name, idStr));
}
end:
return hr;
}