HRESULT CAudioSessionVolume::Initialize()
{
HRESULT hr = S_OK;
IMMDeviceEnumerator *pDeviceEnumerator = NULL;
IMMDevice *pDevice = NULL;
IAudioSessionManager *pAudioSessionManager = NULL;
// Get the enumerator for the audio endpoint devices.
hr = CoCreateInstance(
__uuidof(MMDeviceEnumerator),
NULL,
CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&pDeviceEnumerator)
);
if (FAILED(hr)) { goto done; }
// Get the default audio endpoint that the SAR will use.
hr = pDeviceEnumerator->GetDefaultAudioEndpoint(
eRender,
eConsole, // The SAR uses 'eConsole' by default.
&pDevice
);
if (FAILED(hr)) { goto done; }
// Get the session manager for this device.
hr = pDevice->Activate(
__uuidof(IAudioSessionManager),
CLSCTX_INPROC_SERVER,
NULL,
(void**) &pAudioSessionManager
);
if (FAILED(hr)) { goto done; }
// Get the audio session.
hr = pAudioSessionManager->GetAudioSessionControl(
&GUID_NULL, // Get the default audio session.
FALSE, // The session is not cross-process.
&m_pAudioSession
);
if (FAILED(hr)) { goto done; }
hr = pAudioSessionManager->GetSimpleAudioVolume(
&GUID_NULL, 0, &m_pSimpleAudioVolume
);
done:
SafeRelease(&pDeviceEnumerator);
SafeRelease(&pDevice);
SafeRelease(&pAudioSessionManager);
return hr;
}
//-------------------------------------------------------------------
// Initializes the CAudioSessionEventHandler object.
long CAudioSessionEventHandler::Initialize()
{
_WINQ_FCONTEXT( "CAudioSessionEventHandler::Initialize" );
long hr = 0;
IMMDeviceEnumerator* pDeviceEnumerator = 0;
IMMDevice* pDevice = 0;
IAudioSessionManager* pAudioSessionManager = 0;
// Get the enumerator for the audio endpoint devices.
hr = nsWinQAPI::COLE32::Instance().CoCreateInstance( reinterpret_cast< const ::IID& >( CLASS_MMDEVICEENUMERATOR ), 0, CLSCTX_INPROC_SERVER, reinterpret_cast< const ::IID& >( IMMDeviceEnumerator::_IID ), reinterpret_cast< void** >( &pDeviceEnumerator ) );
if( hr < 0 ) { goto done; }
// Get the default audio endpoint that the SAR will use.
hr = pDeviceEnumerator->GetDefaultAudioEndpoint( eRender, eConsole, // The SAR uses 'eConsole' by default.
&pDevice
);
if( hr < 0 ) { goto done; }
// Get the session manager for this device.
hr = pDevice->Activate( IAudioSessionManager::_IID, CLSCTX_INPROC_SERVER, 0, (void**) &pAudioSessionManager );
if( hr < 0 ) { goto done; }
// Get the audio session.
hr = pAudioSessionManager->GetAudioSessionControl(reinterpret_cast< const nsWin32::GUID* >(&NULL_GUID), // Get the default audio session.
0, // The session is not cross-process.
&m_pAudioSession
);
if( hr < 0 ) { goto done; }
hr = pAudioSessionManager->GetSimpleAudioVolume(reinterpret_cast< const nsWin32::GUID* >(&NULL_GUID), 0, &m_pSimpleAudioVolume);
done:
pDeviceEnumerator->Release();
pDevice->Release();
pAudioSessionManager->Release();
return hr;
}
//设置应用程序静音
bool CCoreAudioVolume::SetMute(BOOL bMute)
{
//IAudioSessionControl *pAudioSection = NULL;
ISimpleAudioVolume *pAudioVolume = NULL;
IAudioSessionManager *pManager = NULL;
IMMDevice *pDevice = NULL;
HRESULT hr;
std::vector<IMMDevice*>::iterator iter = m_vArrayDevice.begin();
for(; iter != m_vArrayDevice.end(); iter++)
{
pDevice = *iter;
ATLASSERT(pDevice != NULL);
hr = pDevice->Activate(__uuidof(IAudioSessionManager),
CLSCTX_INPROC_SERVER, NULL,
(void**)&pManager);
if(FAILED(hr)) continue;
hr = pManager->GetAudioSessionControl(NULL, 0, &m_pAudioSection);
CMutedSessionEvents* pMutedse=new CMutedSessionEvents(pManager);
hr = m_pAudioSection->RegisterAudioSessionNotification(pMutedse);
hr = pManager->GetSimpleAudioVolume(NULL, 0, &pAudioVolume);
if(SUCCEEDED(hr))
{
pAudioVolume->SetMute(bMute, &GUID_NULL);
//pAudioVolume->SetMasterVolume()
}
else
{
ATLASSERT(FALSE);
}
}
SAFE_RELEASE(pManager);
SAFE_RELEASE(pAudioVolume);
return true;
}
