//Initialization
HRESULT CWASAPIRenderFilter::Init()
{
if (!m_pSettings->m_bUseWASAPI)
return S_FALSE;
if (m_pSettings->m_bWASAPIUseEventMode)
{
// Using HW DMA buffer based event notification
m_hDataEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
m_dwStreamFlags = AUDCLNT_STREAMFLAGS_EVENTCALLBACK;
}
else
{
// Using rendering thread polling
m_hDataEvent = CreateWaitableTimer(NULL, TRUE, NULL);
m_dwStreamFlags = 0;
}
m_hDataEvents.push_back(m_hStopThreadEvent);
m_hDataEvents.push_back(m_hDataEvent);
m_dwDataWaitObjects.push_back(MPAR_S_THREAD_STOPPING);
m_dwDataWaitObjects.push_back(MPAR_S_NEED_DATA);
m_hSampleEvents.push_back(m_hStopThreadEvent);
m_hSampleEvents.push_back(m_hOOBCommandAvailableEvent);
m_hSampleEvents.push_back(m_hInputAvailableEvent);
m_dwSampleWaitObjects.push_back(MPAR_S_THREAD_STOPPING);
m_dwSampleWaitObjects.push_back(MPAR_S_OOB_COMMAND_AVAILABLE);
m_dwSampleWaitObjects.push_back(S_OK);
ResetClockData();
return CQueuedAudioSink::Init();
}
CWASAPIRenderFilter::CWASAPIRenderFilter(AudioRendererSettings* pSettings, CSyncClock* pClock, Logger* pLogger) :
CQueuedAudioSink(pSettings, pLogger),
m_pClock(pClock),
m_hLibAVRT(NULL),
m_pMMDevice(NULL),
m_pAudioClient(NULL),
m_pRenderClient(NULL),
m_nFramesInBuffer(0),
m_hTask(NULL),
m_nBufferSize(0),
m_hDataEvent(NULL),
m_pAudioClock(NULL),
m_nHWfreq(0),
m_dwStreamFlags(AUDCLNT_STREAMFLAGS_EVENTCALLBACK | AUDCLNT_STREAMFLAGS_NOPERSIST),
m_state(StateStopped),
m_bIsAudioClientStarted(false),
m_bDeviceInitialized(false),
m_rtNextSampleTime(0),
m_rtHwStart(0),
m_nSampleOffset(0),
m_nDataLeftInSample(0),
m_llPosError(0),
m_ullPrevQpc(0),
m_ullPrevPos(0),
m_hNeedMoreSamples(NULL),
m_rtLatency(0),
m_dOutputBufferSize(m_pSettings->GetOutputBuffer() * 10000),
m_pLogger(pLogger)
{
OSVERSIONINFO osvi;
ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&osvi);
bool bWASAPIAvailable = osvi.dwMajorVersion > 5;
if (!bWASAPIAvailable)
Log("Disabling WASAPI - OS version earlier than Vista detected");
// Load Vista specifics DLLs
m_hLibAVRT = LoadLibrary (_T("AVRT.dll"));
if (m_hLibAVRT && bWASAPIAvailable)
{
pfAvSetMmThreadCharacteristicsW = (PTR_AvSetMmThreadCharacteristicsW) GetProcAddress (m_hLibAVRT, "AvSetMmThreadCharacteristicsW");
pfAvRevertMmThreadCharacteristics = (PTR_AvRevertMmThreadCharacteristics) GetProcAddress (m_hLibAVRT, "AvRevertMmThreadCharacteristics");
}
else
pSettings->SetUseWASAPI(false); // WASAPI not available below Vista
if (pSettings->GetUseWASAPI())
{
IMMDeviceCollection* devices = NULL;
pSettings->GetAvailableAudioDevices(&devices, NULL, true);
SAFE_RELEASE(devices); // currently only log available devices
}
// We are the end point in the pipeline so we cannot ever have passtru
m_bNextFormatPassthru = false;
m_nOutBufferCount = WASAPI_OUT_BUFFER_COUNT;
ResetClockData();
}
