HRESULT CSampleCGB::FindEncoder( IEnumMoniker *pEncoders, REGPINMEDIUM pinMedium, IBaseFilter **ppEncoder )
{
if( ! pEncoders )
{
return E_INVALIDARG;
}
if(IsEqualGUID(pinMedium.clsMedium,GUID_NULL) || IsEqualGUID(pinMedium.clsMedium,KSMEDIUMSETID_Standard))
{
return E_INVALIDARG;
}
HRESULT hr;
SmartPtr<IBaseFilter> pFilter;
SmartPtr<IMoniker> pMoniker;
ULONG cFetched;
SmartPtr<IPin> pPin;
while(pFilter.Release(),pMoniker.Release(),S_OK == pEncoders->Next(1,&pMoniker,&cFetched))
{
hr = pMoniker->BindToObject(0,0,IID_IBaseFilter,(void**)&pFilter);
if(FAILED(hr))continue;
hr = FindPin(pFilter,pinMedium,PINDIR_INPUT,TRUE,&pPin);
if(SUCCEEDED(hr))
{
*ppEncoder = pFilter.Detach();
return hr;
}
}
return E_FAIL;
}
HRESULT
ISampleCaptureGraphBuilder::ConnectMultiplexerToMPEG2Demux(
IBaseFilter *pEncoder,
IEnumMoniker *pMultiplexers )
{
if( !pEncoder || !pMultiplexers )
{
return E_INVALIDARG;
}
SmartPtr<IBaseFilter> pFilter;
SmartPtr<IMoniker> pMoniker;
ULONG fetched;
HRESULT hr;
while( pFilter.Release(), pMoniker.Release(),
S_OK == pMultiplexers->Next( 1, &pMoniker, &fetched ) )
{
hr = pMoniker->BindToObject(
0, 0, IID_IBaseFilter, reinterpret_cast<void **>( &pFilter ) );
if( FAILED( hr ) )
{
continue;
}
hr = graph_->AddFilter( pFilter, NULL );
if( FAILED( hr ) )
{
continue;
}
//
// connect the encoder to the multiplexer
//
hr = ConnectFilters( pEncoder, pFilter );
if( FAILED( hr ) )
{
graph_->RemoveFilter( pFilter );
continue;
}
//
// connect the multiplexer to the encoder
//
hr = ConnectFilters( pFilter, pMPEG2Demux_ );
if( SUCCEEDED( hr ) )
{
pMultiplexer_ = pFilter;
return S_OK;
}
}
return E_FAIL;
}
HRESULT
ISampleCaptureGraphBuilder::RenderToMPEG2Demux(
IPin *pPin,
IEnumMoniker *pEncoders)
{
if( !pPin || !pEncoders )
{
return E_INVALIDARG;
}
REGPINMEDIUM pinMedium ;
pinMedium.clsMedium = GUID_NULL;
pinMedium.dw1 = 0;
pinMedium.dw2 = 0;
SmartPtr<IBaseFilter> pFilter;
SmartPtr<IMoniker> pMoniker;
ULONG fetched;
HRESULT hr;
while( pFilter.Release(), pMoniker.Release(), S_OK == pEncoders->Next( 1, &pMoniker, &fetched ) )
{
hr = pMoniker->BindToObject(
0, 0, IID_IBaseFilter, reinterpret_cast<void **>( &pFilter ) );
if( FAILED( hr ) )
{
continue;
}
hr = graph_->AddFilter( pFilter, L"Encoder" );
if( FAILED( hr ) )
{
continue;
}
hr = ConnectPin( pPin, pFilter );
if( FAILED( hr ) )
{
graph_->RemoveFilter( pFilter );
continue;
}
hr = ConnectEncoderToMPEG2Demux( pFilter, pinMedium );
if( SUCCEEDED( hr ) )
{
pEncoder_ = pFilter;
return S_OK;
}
graph_->RemoveFilter( pFilter );
}
return E_FAIL;
}
HRESULT
ISampleCaptureGraphBuilder::ConnectAudioPinToMultiplexer(
IPin *pPin,
IBaseFilter *pMultiplexer)
{
if( !pPin || !pMultiplexer )
{
return E_INVALIDARG;
}
REGPINMEDIUM pinMedium;
HRESULT hr = GetMedium( pPin, pinMedium );
if( FAILED( hr ) )
{
return hr;
}
SmartPtr<IBaseFilter> pEncoder;
SmartPtr<IEnumMoniker> pEncoders;
if( FALSE == ::IsEqualGUID( pinMedium.clsMedium, GUID_NULL ) )
{
//
// search through encoders category; identify
// the encoder using the medium
//
hr = GetEncodersByCategory( &pEncoders );
if( FAILED( hr ) )
{
return hr;
}
hr = FindEncoder( pEncoders, pinMedium, &pEncoder );
if( SUCCEEDED( hr ) )
{
hr = graph_->AddFilter( pEncoder, L"Audio Encoder" );
if( SUCCEEDED( hr ) &&
SUCCEEDED( ConnectPin( pPin, pEncoder ) ) &&
SUCCEEDED( ConnectFilters( pEncoder, pMultiplexer ) )
)
{
return S_OK;
}
}
pEncoders = NULL;
hr = GetEncodersByEnumerating( pPin, pinMedium, &pEncoders );
if( FAILED( hr ) )
{
return hr;
}
hr = FindEncoder( pEncoders, pinMedium, &pEncoder );
if( SUCCEEDED( hr ) )
{
hr = graph_->AddFilter( pEncoder, L"Audio Encoder" );
if( SUCCEEDED( hr ) &&
SUCCEEDED( ConnectPin( pPin, pEncoder ) ) &&
SUCCEEDED( ConnectFilters( pEncoder, pMultiplexer ) )
)
{
return S_OK;
}
}
return E_FAIL;
}
//
// Search throgh the codec category
//
hr = GetEncodersByCategory( &pEncoders );
if( FAILED( hr ) )
{
return hr;
}
SmartPtr<IBaseFilter> pFilter;
SmartPtr<IMoniker> pMoniker;
ULONG fetched;
while( pFilter.Release(), pMoniker.Release(), S_OK == pEncoders->Next( 1, &pMoniker, &fetched ) )
{
hr = pMoniker->BindToObject(
0, 0, IID_IBaseFilter, reinterpret_cast<void **>( &pFilter ) );
if( FAILED( hr ) )
{
continue;
}
hr = graph_->AddFilter( pFilter, L"Audio Encoder" );
if( FAILED( hr ) )
{
continue;
}
hr = ConnectPin( pPin, pFilter );
if( FAILED( hr ) )
{
graph_->RemoveFilter( pFilter );
continue;
}
hr = ConnectFilters( pFilter, pMultiplexer );
if( SUCCEEDED( hr ) )
{
return S_OK;
}
graph_->RemoveFilter( pFilter );
}
return E_FAIL;
}
