HRESULT CSampleCGB::BuildMPEG2Segment( IBaseFilter *pFilter )
{
if(!pFilter)return E_POINTER;
HRESULT hr = AddMPEG2Demux();
if(FAILED(hr))return hr;
//在filter上查找MPEG2 pin
SmartPtr<IPin> pPin;
hr = FindMPEG2Pin(pFilter,&pPin);
if(SUCCEEDED(hr))
{
hr = ConnectPin(pPin,pMPEG2Demux_);
if(FAILED(hr))
{
graph_->RemoveFilter(pMPEG2Demux_);
return E_FAIL;
}
return S_OK;
}
//
// no pins that streams directly MPEG2 stream
//
hr = FindVideoPin(pFilter,&pPin);
if(FAILED(hr))
{
graph_->RemoveFilter(pMPEG2Demux_);
return hr;// no video pin
}
return hr;
}
HRESULT
ISampleCaptureGraphBuilder::BuildMPEG2Segment(IBaseFilter *pFilter)
{
if( ! pFilter )
{
return E_FAIL;
}
HRESULT hr = AddMPEG2Demux( );
if( FAILED( hr ) )
{
return hr;
}
//
// Search a MPEG2 pin on the
// filter
//
SmartPtr<IPin> pPin;
hr = FindMPEG2Pin( pFilter, &pPin );
if( SUCCEEDED( hr ) )
{
hr = ConnectPin( pPin, pMPEG2Demux_ );
if( FAILED( hr ) )
{
graph_->RemoveFilter( pMPEG2Demux_ );
return E_FAIL;
}
return S_OK;
}
//
// no pins that streams directly MPEG2 stream
//
hr = FindVideoPin( pFilter, &pPin );
if( FAILED( hr ) )
{
graph_->RemoveFilter( pMPEG2Demux_ );
return hr; // no video pin
}
hr = RenderToMPEG2Demux( pPin );
if( FAILED( hr ) )
{
graph_->RemoveFilter( pMPEG2Demux_ );
return hr;
}
SmartPtr<IPin> pAudioPin;
hr = FindAudioPin( pFilter, &pAudioPin );
if( FAILED( hr ) )
{
//
// don't bother with audio
//
return S_OK;
}
//
// try to connect the audio pin directly to encoder
// if this is not possible, then try to find an encoder
// and connect it to the multiplexer
//
ASSERT( pEncoder_ );
hr = ConnectPin( pAudioPin, pEncoder_ );
if( FAILED( hr ) )
{
hr = ConnectAudioPinToMultiplexer( pAudioPin, pMultiplexer_ );
}
return S_OK;
}