HRESULT CDXFilter::Receive( IMediaSample * pms )
{
CheckPointer(pms,E_POINTER);
HRESULT hr;
AM_SAMPLE2_PROPERTIES * const pProps = m_pInput->SampleProps();
if (pProps->dwStreamId != AM_STREAM_MEDIA)
{
if( m_pOutput->IsConnected() )
return m_pOutput->Deliver(pms);
else
return NOERROR;
}
#if !defined(_WIN32_WCE)
if (UsingDifferentAllocators())
{
// We have to copy the data.
pms = Copy(pms);
if (pms == NULL)
{
return E_UNEXPECTED;
}
}
#endif
// have the derived class transform the data
hr = Transform(pms);
if (FAILED(hr))
{
//DbgLog((LOG_TRACE, 1, TEXT("Error from TransInPlace")));
#if !defined(_WIN32_WCE)
if (UsingDifferentAllocators())
{
pms->Release();
}
#endif
return hr;
}
if (hr == NOERROR)
{
hr = m_pOutput->Deliver(pms);
}
// release the output buffer. If the connected pin still needs it,
// it will have addrefed it itself.
#if !defined(_WIN32_WCE)
if (UsingDifferentAllocators())
{
pms->Release();
}
#endif
return hr;
}
HRESULT
CTransInPlaceFilter::Receive(IMediaSample *pSample)
{
/* Check for other streams and pass them on */
AM_SAMPLE2_PROPERTIES * const pProps = m_pInput->SampleProps();
if (pProps->dwStreamId != AM_STREAM_MEDIA) {
return m_pOutput->Deliver(pSample);
}
HRESULT hr;
// Start timing the TransInPlace (if PERF is defined)
MSR_START(m_idTransInPlace);
if (UsingDifferentAllocators()) {
// We have to copy the data.
pSample = Copy(pSample);
if (pSample==NULL) {
MSR_STOP(m_idTransInPlace);
return E_UNEXPECTED;
}
}
// have the derived class transform the data
hr = Transform(pSample);
// Stop the clock and log it (if PERF is defined)
MSR_STOP(m_idTransInPlace);
if (FAILED(hr)) {
DbgLog((LOG_TRACE, 1, TEXT("Error from TransInPlace")));
if (UsingDifferentAllocators()) {
pSample->Release();
}
return hr;
}
// the Transform() function can return S_FALSE to indicate that the
// sample should not be delivered; we only deliver the sample if it's
// really S_OK (same as NOERROR, of course.)
if (hr == NOERROR) {
hr = m_pOutput->Deliver(pSample);
} else {
// But it would be an error to return this private workaround
// to the caller ...
if (S_FALSE == hr) {
// S_FALSE returned from Transform is a PRIVATE agreement
// We should return NOERROR from Receive() in this cause because
// returning S_FALSE from Receive() means that this is the end
// of the stream and no more data should be sent.
m_bSampleSkipped = TRUE;
if (!m_bQualityChanged) {
NotifyEvent(EC_QUALITY_CHANGE,0,0);
m_bQualityChanged = TRUE;
}
hr = NOERROR;
}
}
// release the output buffer. If the connected pin still needs it,
// it will have addrefed it itself.
if (UsingDifferentAllocators()) {
pSample->Release();
}
return hr;
} // Receive
