HRESULT CMpcAudioRenderer::InitCoopLevel()
{
HRESULT hr = S_OK;
IVideoWindow* pVideoWindow = nullptr;
HWND hWnd = nullptr;
hr = m_pGraph->QueryInterface(IID_PPV_ARGS(&pVideoWindow));
if (SUCCEEDED(hr)) {
pVideoWindow->get_Owner((OAHWND*)&hWnd);
SAFE_RELEASE(pVideoWindow);
}
if (!hWnd) {
hWnd = GetTopWindow(nullptr);
}
ASSERT(hWnd != nullptr);
if (!m_useWASAPI) {
hr = m_pDS->SetCooperativeLevel(hWnd, DSSCL_PRIORITY);
} else if (hTask == nullptr) {
// Ask MMCSS to temporarily boost the thread priority
// to reduce glitches while the low-latency stream plays.
DWORD taskIndex = 0;
if (pfAvSetMmThreadCharacteristicsW) {
hTask = pfAvSetMmThreadCharacteristicsW(_T("Pro Audio"), &taskIndex);
TRACE(_T("CMpcAudioRenderer::InitCoopLevel Putting thread in higher priority for WASAPI mode (lowest latency)\n"));
hr = GetLastError();
if (hTask == nullptr) {
return hr;
}
}
}
return hr;
}
HRESULT CWASAPIRenderFilter::EnableMMCSS()
{
if (!m_hTask)
{
// Ask MMCSS to temporarily boost the thread priority
// to reduce glitches while the low-latency stream plays.
DWORD taskIndex = 0;
if (pfAvSetMmThreadCharacteristicsW)
{
m_hTask = pfAvSetMmThreadCharacteristicsW(L"Pro Audio", &taskIndex);
Log("CWASAPIRenderFilter::EnableMMCSS Putting thread in higher priority for WASAPI mode");
if (!m_hTask)
return HRESULT_FROM_WIN32(GetLastError());
}
}
return S_OK;
}
HRESULT CMpcAudioRenderer::InitCoopLevel()
{
HRESULT hr = S_OK;
IVideoWindow* pVideoWindow = NULL;
HWND hWnd = NULL;
CComBSTR bstrCaption;
hr = m_pGraph->QueryInterface (__uuidof(IVideoWindow), (void**) &pVideoWindow);
if (SUCCEEDED (hr))
{
pVideoWindow->get_Owner((OAHWND*)&hWnd);
SAFE_RELEASE (pVideoWindow);
}
if (!hWnd)
{
hWnd = GetTopWindow(NULL);
}
ATLASSERT(hWnd != NULL);
if (!useWASAPI)
hr = m_pDS->SetCooperativeLevel(hWnd, DSSCL_PRIORITY);
else if (hTask == NULL)
{
// Ask MMCSS to temporarily boost the thread priority
// to reduce glitches while the low-latency stream plays.
DWORD taskIndex = 0;
if (pfAvSetMmThreadCharacteristicsW)
{
hTask = pfAvSetMmThreadCharacteristicsW(TEXT("Pro Audio"), &taskIndex);
TRACE(_T("CMpcAudioRenderer::InitCoopLevel Putting thread in higher priority for Wasapi mode (lowest latency)"));
hr=GetLastError();
if (hTask == NULL)
return hr;
}
}
return hr;
}
