1017 lines
27 KiB
C++
1017 lines
27 KiB
C++
//------------------------------------------------------------------------------
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// File: Transfrm.cpp
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//
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// Desc: DirectShow base classes - implements class for simple transform
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// filters such as video decompressors.
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//
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// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------------------------
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#include <streams.h>
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#include <measure.h>
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// =================================================================
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// Implements the CTransformFilter class
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// =================================================================
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CTransformFilter::CTransformFilter(TCHAR *pName,
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LPUNKNOWN pUnk,
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REFCLSID clsid) :
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CBaseFilter(pName,pUnk,&m_csFilter, clsid),
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m_pInput(NULL),
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m_pOutput(NULL),
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m_bEOSDelivered(FALSE),
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m_bQualityChanged(FALSE),
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m_bSampleSkipped(FALSE)
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{
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#ifdef PERF
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RegisterPerfId();
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#endif // PERF
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}
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#ifdef UNICODE
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CTransformFilter::CTransformFilter(char *pName,
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LPUNKNOWN pUnk,
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REFCLSID clsid) :
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CBaseFilter(pName,pUnk,&m_csFilter, clsid),
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m_pInput(NULL),
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m_pOutput(NULL),
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m_bEOSDelivered(FALSE),
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m_bQualityChanged(FALSE),
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m_bSampleSkipped(FALSE)
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{
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#ifdef PERF
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RegisterPerfId();
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#endif // PERF
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}
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#endif
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// destructor
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CTransformFilter::~CTransformFilter()
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{
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// Delete the pins
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delete m_pInput;
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delete m_pOutput;
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}
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// Transform place holder - should never be called
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HRESULT CTransformFilter::Transform(IMediaSample * pIn, IMediaSample *pOut)
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{
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UNREFERENCED_PARAMETER(pIn);
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UNREFERENCED_PARAMETER(pOut);
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DbgBreak("CTransformFilter::Transform() should never be called");
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return E_UNEXPECTED;
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}
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// return the number of pins we provide
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int CTransformFilter::GetPinCount()
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{
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return 2;
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}
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// return a non-addrefed CBasePin * for the user to addref if he holds onto it
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// for longer than his pointer to us. We create the pins dynamically when they
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// are asked for rather than in the constructor. This is because we want to
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// give the derived class an oppportunity to return different pin objects
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// We return the objects as and when they are needed. If either of these fails
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// then we return NULL, the assumption being that the caller will realise the
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// whole deal is off and destroy us - which in turn will delete everything.
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CBasePin *
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CTransformFilter::GetPin(int n)
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{
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HRESULT hr = S_OK;
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// Create an input pin if necessary
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if (m_pInput == NULL) {
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m_pInput = new CTransformInputPin(NAME("Transform input pin"),
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this, // Owner filter
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&hr, // Result code
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L"XForm In"); // Pin name
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// Can't fail
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ASSERT(SUCCEEDED(hr));
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if (m_pInput == NULL) {
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return NULL;
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}
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m_pOutput = (CTransformOutputPin *)
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new CTransformOutputPin(NAME("Transform output pin"),
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this, // Owner filter
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&hr, // Result code
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L"XForm Out"); // Pin name
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// Can't fail
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ASSERT(SUCCEEDED(hr));
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if (m_pOutput == NULL) {
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delete m_pInput;
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m_pInput = NULL;
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}
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}
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// Return the appropriate pin
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if (n == 0) {
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return m_pInput;
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} else
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if (n == 1) {
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return m_pOutput;
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} else {
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return NULL;
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}
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}
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//
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// FindPin
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//
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// If Id is In or Out then return the IPin* for that pin
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// creating the pin if need be. Otherwise return NULL with an error.
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STDMETHODIMP CTransformFilter::FindPin(LPCWSTR Id, IPin **ppPin)
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{
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CheckPointer(ppPin,E_POINTER);
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ValidateReadWritePtr(ppPin,sizeof(IPin *));
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if (0==lstrcmpW(Id,L"In")) {
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*ppPin = GetPin(0);
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} else if (0==lstrcmpW(Id,L"Out")) {
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*ppPin = GetPin(1);
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} else {
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*ppPin = NULL;
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return VFW_E_NOT_FOUND;
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}
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HRESULT hr = NOERROR;
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// AddRef() returned pointer - but GetPin could fail if memory is low.
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if (*ppPin) {
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(*ppPin)->AddRef();
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} else {
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hr = E_OUTOFMEMORY; // probably. There's no pin anyway.
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}
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return hr;
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}
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// override these two functions if you want to inform something
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// about entry to or exit from streaming state.
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HRESULT
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CTransformFilter::StartStreaming()
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{
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return NOERROR;
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}
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HRESULT
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CTransformFilter::StopStreaming()
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{
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return NOERROR;
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}
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// override this to grab extra interfaces on connection
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HRESULT
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CTransformFilter::CheckConnect(PIN_DIRECTION dir,IPin *pPin)
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{
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UNREFERENCED_PARAMETER(dir);
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UNREFERENCED_PARAMETER(pPin);
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return NOERROR;
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}
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// place holder to allow derived classes to release any extra interfaces
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HRESULT
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CTransformFilter::BreakConnect(PIN_DIRECTION dir)
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{
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UNREFERENCED_PARAMETER(dir);
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return NOERROR;
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}
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// Let derived classes know about connection completion
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HRESULT
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CTransformFilter::CompleteConnect(PIN_DIRECTION direction,IPin *pReceivePin)
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{
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UNREFERENCED_PARAMETER(direction);
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UNREFERENCED_PARAMETER(pReceivePin);
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return NOERROR;
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}
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// override this to know when the media type is really set
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HRESULT
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CTransformFilter::SetMediaType(PIN_DIRECTION direction,const CMediaType *pmt)
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{
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UNREFERENCED_PARAMETER(direction);
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UNREFERENCED_PARAMETER(pmt);
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return NOERROR;
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}
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// Set up our output sample
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HRESULT
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CTransformFilter::InitializeOutputSample(IMediaSample *pSample, IMediaSample **ppOutSample)
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{
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IMediaSample *pOutSample;
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// default - times are the same
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AM_SAMPLE2_PROPERTIES * const pProps = m_pInput->SampleProps();
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DWORD dwFlags = m_bSampleSkipped ? AM_GBF_PREVFRAMESKIPPED : 0;
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// This will prevent the image renderer from switching us to DirectDraw
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// when we can't do it without skipping frames because we're not on a
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// keyframe. If it really has to switch us, it still will, but then we
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// will have to wait for the next keyframe
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if (!(pProps->dwSampleFlags & AM_SAMPLE_SPLICEPOINT)) {
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dwFlags |= AM_GBF_NOTASYNCPOINT;
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}
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ASSERT(m_pOutput->m_pAllocator != NULL);
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HRESULT hr = m_pOutput->m_pAllocator->GetBuffer(
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&pOutSample
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, pProps->dwSampleFlags & AM_SAMPLE_TIMEVALID ?
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&pProps->tStart : NULL
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, pProps->dwSampleFlags & AM_SAMPLE_STOPVALID ?
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&pProps->tStop : NULL
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, dwFlags
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);
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*ppOutSample = pOutSample;
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if (FAILED(hr)) {
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return hr;
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}
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ASSERT(pOutSample);
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IMediaSample2 *pOutSample2;
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if (SUCCEEDED(pOutSample->QueryInterface(IID_IMediaSample2,
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(void **)&pOutSample2))) {
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/* Modify it */
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AM_SAMPLE2_PROPERTIES OutProps;
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EXECUTE_ASSERT(SUCCEEDED(pOutSample2->GetProperties(
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FIELD_OFFSET(AM_SAMPLE2_PROPERTIES, tStart), (PBYTE)&OutProps)
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));
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OutProps.dwTypeSpecificFlags = pProps->dwTypeSpecificFlags;
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OutProps.dwSampleFlags =
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(OutProps.dwSampleFlags & AM_SAMPLE_TYPECHANGED) |
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(pProps->dwSampleFlags & ~AM_SAMPLE_TYPECHANGED);
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OutProps.tStart = pProps->tStart;
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OutProps.tStop = pProps->tStop;
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OutProps.cbData = FIELD_OFFSET(AM_SAMPLE2_PROPERTIES, dwStreamId);
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hr = pOutSample2->SetProperties(
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FIELD_OFFSET(AM_SAMPLE2_PROPERTIES, dwStreamId),
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(PBYTE)&OutProps
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);
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if (pProps->dwSampleFlags & AM_SAMPLE_DATADISCONTINUITY) {
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m_bSampleSkipped = FALSE;
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}
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pOutSample2->Release();
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} else {
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if (pProps->dwSampleFlags & AM_SAMPLE_TIMEVALID) {
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pOutSample->SetTime(&pProps->tStart,
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&pProps->tStop);
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}
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if (pProps->dwSampleFlags & AM_SAMPLE_SPLICEPOINT) {
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pOutSample->SetSyncPoint(TRUE);
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}
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if (pProps->dwSampleFlags & AM_SAMPLE_DATADISCONTINUITY) {
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pOutSample->SetDiscontinuity(TRUE);
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m_bSampleSkipped = FALSE;
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}
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// Copy the media times
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LONGLONG MediaStart, MediaEnd;
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if (pSample->GetMediaTime(&MediaStart,&MediaEnd) == NOERROR) {
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pOutSample->SetMediaTime(&MediaStart,&MediaEnd);
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}
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}
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return S_OK;
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}
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// override this to customize the transform process
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HRESULT
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CTransformFilter::Receive(IMediaSample *pSample)
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{
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/* Check for other streams and pass them on */
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AM_SAMPLE2_PROPERTIES * const pProps = m_pInput->SampleProps();
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if (pProps->dwStreamId != AM_STREAM_MEDIA) {
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return m_pOutput->m_pInputPin->Receive(pSample);
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}
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HRESULT hr;
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ASSERT(pSample);
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IMediaSample * pOutSample;
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// If no output to deliver to then no point sending us data
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ASSERT (m_pOutput != NULL) ;
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// Set up the output sample
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hr = InitializeOutputSample(pSample, &pOutSample);
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if (FAILED(hr)) {
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return hr;
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}
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// Start timing the transform (if PERF is defined)
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MSR_START(m_idTransform);
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// have the derived class transform the data
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hr = Transform(pSample, pOutSample);
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// Stop the clock and log it (if PERF is defined)
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MSR_STOP(m_idTransform);
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if (FAILED(hr)) {
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DbgLog((LOG_TRACE,1,TEXT("Error from transform")));
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} else {
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// the Transform() function can return S_FALSE to indicate that the
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// sample should not be delivered; we only deliver the sample if it's
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// really S_OK (same as NOERROR, of course.)
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if (hr == NOERROR) {
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hr = m_pOutput->m_pInputPin->Receive(pOutSample);
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m_bSampleSkipped = FALSE; // last thing no longer dropped
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} else {
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// S_FALSE returned from Transform is a PRIVATE agreement
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// We should return NOERROR from Receive() in this cause because returning S_FALSE
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// from Receive() means that this is the end of the stream and no more data should
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// be sent.
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if (S_FALSE == hr) {
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// Release the sample before calling notify to avoid
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// deadlocks if the sample holds a lock on the system
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// such as DirectDraw buffers do
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pOutSample->Release();
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m_bSampleSkipped = TRUE;
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if (!m_bQualityChanged) {
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NotifyEvent(EC_QUALITY_CHANGE,0,0);
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m_bQualityChanged = TRUE;
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}
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return NOERROR;
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}
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}
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}
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// release the output buffer. If the connected pin still needs it,
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// it will have addrefed it itself.
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pOutSample->Release();
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return hr;
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}
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// Return S_FALSE to mean "pass the note on upstream"
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// Return NOERROR (Same as S_OK)
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// to mean "I've done something about it, don't pass it on"
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HRESULT CTransformFilter::AlterQuality(Quality q)
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{
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UNREFERENCED_PARAMETER(q);
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return S_FALSE;
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}
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// EndOfStream received. Default behaviour is to deliver straight
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// downstream, since we have no queued data. If you overrode Receive
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// and have queue data, then you need to handle this and deliver EOS after
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// all queued data is sent
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HRESULT
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CTransformFilter::EndOfStream(void)
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{
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HRESULT hr = NOERROR;
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if (m_pOutput != NULL) {
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hr = m_pOutput->DeliverEndOfStream();
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}
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return hr;
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}
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// enter flush state. Receives already blocked
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// must override this if you have queued data or a worker thread
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HRESULT
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CTransformFilter::BeginFlush(void)
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{
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HRESULT hr = NOERROR;
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if (m_pOutput != NULL) {
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// block receives -- done by caller (CBaseInputPin::BeginFlush)
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// discard queued data -- we have no queued data
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// free anyone blocked on receive - not possible in this filter
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// call downstream
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hr = m_pOutput->DeliverBeginFlush();
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}
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return hr;
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}
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// leave flush state. must override this if you have queued data
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// or a worker thread
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HRESULT
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CTransformFilter::EndFlush(void)
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{
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// sync with pushing thread -- we have no worker thread
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// ensure no more data to go downstream -- we have no queued data
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// call EndFlush on downstream pins
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ASSERT (m_pOutput != NULL);
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return m_pOutput->DeliverEndFlush();
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// caller (the input pin's method) will unblock Receives
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}
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// override these so that the derived filter can catch them
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STDMETHODIMP
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CTransformFilter::Stop()
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{
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CAutoLock lck1(&m_csFilter);
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if (m_State == State_Stopped) {
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return NOERROR;
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}
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// Succeed the Stop if we are not completely connected
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ASSERT(m_pInput == NULL || m_pOutput != NULL);
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if (m_pInput == NULL || m_pInput->IsConnected() == FALSE ||
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m_pOutput->IsConnected() == FALSE) {
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m_State = State_Stopped;
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m_bEOSDelivered = FALSE;
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return NOERROR;
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}
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ASSERT(m_pInput);
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ASSERT(m_pOutput);
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// decommit the input pin before locking or we can deadlock
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m_pInput->Inactive();
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// synchronize with Receive calls
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CAutoLock lck2(&m_csReceive);
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m_pOutput->Inactive();
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// allow a class derived from CTransformFilter
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// to know about starting and stopping streaming
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HRESULT hr = StopStreaming();
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if (SUCCEEDED(hr)) {
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// complete the state transition
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m_State = State_Stopped;
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m_bEOSDelivered = FALSE;
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}
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return hr;
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}
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STDMETHODIMP
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CTransformFilter::Pause()
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{
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CAutoLock lck(&m_csFilter);
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HRESULT hr = NOERROR;
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if (m_State == State_Paused) {
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// (This space left deliberately blank)
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}
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// If we have no input pin or it isn't yet connected then when we are
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// asked to pause we deliver an end of stream to the downstream filter.
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// This makes sure that it doesn't sit there forever waiting for
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// samples which we cannot ever deliver without an input connection.
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else if (m_pInput == NULL || m_pInput->IsConnected() == FALSE) {
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if (m_pOutput && m_bEOSDelivered == FALSE) {
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m_pOutput->DeliverEndOfStream();
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m_bEOSDelivered = TRUE;
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}
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m_State = State_Paused;
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}
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// We may have an input connection but no output connection
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// However, if we have an input pin we do have an output pin
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else if (m_pOutput->IsConnected() == FALSE) {
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m_State = State_Paused;
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}
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else {
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if (m_State == State_Stopped) {
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// allow a class derived from CTransformFilter
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// to know about starting and stopping streaming
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CAutoLock lck2(&m_csReceive);
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hr = StartStreaming();
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}
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if (SUCCEEDED(hr)) {
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hr = CBaseFilter::Pause();
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}
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}
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m_bSampleSkipped = FALSE;
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m_bQualityChanged = FALSE;
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return hr;
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}
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HRESULT
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CTransformFilter::NewSegment(
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REFERENCE_TIME tStart,
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REFERENCE_TIME tStop,
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double dRate)
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{
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if (m_pOutput != NULL) {
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return m_pOutput->DeliverNewSegment(tStart, tStop, dRate);
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}
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return S_OK;
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}
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// Check streaming status
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HRESULT
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CTransformInputPin::CheckStreaming()
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{
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ASSERT(m_pTransformFilter->m_pOutput != NULL);
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if (!m_pTransformFilter->m_pOutput->IsConnected()) {
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return VFW_E_NOT_CONNECTED;
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} else {
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// Shouldn't be able to get any data if we're not connected!
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ASSERT(IsConnected());
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// we're flushing
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if (m_bFlushing) {
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return S_FALSE;
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}
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// Don't process stuff in Stopped state
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if (IsStopped()) {
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return VFW_E_WRONG_STATE;
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}
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if (m_bRunTimeError) {
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return VFW_E_RUNTIME_ERROR;
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}
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return S_OK;
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}
|
|
}
|
|
|
|
|
|
// =================================================================
|
|
// Implements the CTransformInputPin class
|
|
// =================================================================
|
|
|
|
|
|
// constructor
|
|
|
|
CTransformInputPin::CTransformInputPin(
|
|
TCHAR *pObjectName,
|
|
CTransformFilter *pTransformFilter,
|
|
HRESULT * phr,
|
|
LPCWSTR pName)
|
|
: CBaseInputPin(pObjectName, pTransformFilter, &pTransformFilter->m_csFilter, phr, pName)
|
|
{
|
|
DbgLog((LOG_TRACE,2,TEXT("CTransformInputPin::CTransformInputPin")));
|
|
m_pTransformFilter = pTransformFilter;
|
|
}
|
|
|
|
#ifdef UNICODE
|
|
CTransformInputPin::CTransformInputPin(
|
|
CHAR *pObjectName,
|
|
CTransformFilter *pTransformFilter,
|
|
HRESULT * phr,
|
|
LPCWSTR pName)
|
|
: CBaseInputPin(pObjectName, pTransformFilter, &pTransformFilter->m_csFilter, phr, pName)
|
|
{
|
|
DbgLog((LOG_TRACE,2,TEXT("CTransformInputPin::CTransformInputPin")));
|
|
m_pTransformFilter = pTransformFilter;
|
|
}
|
|
#endif
|
|
|
|
// provides derived filter a chance to grab extra interfaces
|
|
|
|
HRESULT
|
|
CTransformInputPin::CheckConnect(IPin *pPin)
|
|
{
|
|
HRESULT hr = m_pTransformFilter->CheckConnect(PINDIR_INPUT,pPin);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
return CBaseInputPin::CheckConnect(pPin);
|
|
}
|
|
|
|
|
|
// provides derived filter a chance to release it's extra interfaces
|
|
|
|
HRESULT
|
|
CTransformInputPin::BreakConnect()
|
|
{
|
|
// Can't disconnect unless stopped
|
|
ASSERT(IsStopped());
|
|
m_pTransformFilter->BreakConnect(PINDIR_INPUT);
|
|
return CBaseInputPin::BreakConnect();
|
|
}
|
|
|
|
|
|
// Let derived class know when the input pin is connected
|
|
|
|
HRESULT
|
|
CTransformInputPin::CompleteConnect(IPin *pReceivePin)
|
|
{
|
|
HRESULT hr = m_pTransformFilter->CompleteConnect(PINDIR_INPUT,pReceivePin);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
return CBaseInputPin::CompleteConnect(pReceivePin);
|
|
}
|
|
|
|
|
|
// check that we can support a given media type
|
|
|
|
HRESULT
|
|
CTransformInputPin::CheckMediaType(const CMediaType* pmt)
|
|
{
|
|
// Check the input type
|
|
|
|
HRESULT hr = m_pTransformFilter->CheckInputType(pmt);
|
|
if (S_OK != hr) {
|
|
return hr;
|
|
}
|
|
|
|
// if the output pin is still connected, then we have
|
|
// to check the transform not just the input format
|
|
|
|
if ((m_pTransformFilter->m_pOutput != NULL) &&
|
|
(m_pTransformFilter->m_pOutput->IsConnected())) {
|
|
return m_pTransformFilter->CheckTransform(
|
|
pmt,
|
|
&m_pTransformFilter->m_pOutput->CurrentMediaType());
|
|
} else {
|
|
return hr;
|
|
}
|
|
}
|
|
|
|
|
|
// set the media type for this connection
|
|
|
|
HRESULT
|
|
CTransformInputPin::SetMediaType(const CMediaType* mtIn)
|
|
{
|
|
// Set the base class media type (should always succeed)
|
|
HRESULT hr = CBasePin::SetMediaType(mtIn);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
// check the transform can be done (should always succeed)
|
|
ASSERT(SUCCEEDED(m_pTransformFilter->CheckInputType(mtIn)));
|
|
|
|
return m_pTransformFilter->SetMediaType(PINDIR_INPUT,mtIn);
|
|
}
|
|
|
|
|
|
// =================================================================
|
|
// Implements IMemInputPin interface
|
|
// =================================================================
|
|
|
|
|
|
// provide EndOfStream that passes straight downstream
|
|
// (there is no queued data)
|
|
STDMETHODIMP
|
|
CTransformInputPin::EndOfStream(void)
|
|
{
|
|
CAutoLock lck(&m_pTransformFilter->m_csReceive);
|
|
HRESULT hr = CheckStreaming();
|
|
if (S_OK == hr) {
|
|
hr = m_pTransformFilter->EndOfStream();
|
|
}
|
|
return hr;
|
|
}
|
|
|
|
|
|
// enter flushing state. Call default handler to block Receives, then
|
|
// pass to overridable method in filter
|
|
STDMETHODIMP
|
|
CTransformInputPin::BeginFlush(void)
|
|
{
|
|
CAutoLock lck(&m_pTransformFilter->m_csFilter);
|
|
// Are we actually doing anything?
|
|
ASSERT(m_pTransformFilter->m_pOutput != NULL);
|
|
if (!IsConnected() ||
|
|
!m_pTransformFilter->m_pOutput->IsConnected()) {
|
|
return VFW_E_NOT_CONNECTED;
|
|
}
|
|
HRESULT hr = CBaseInputPin::BeginFlush();
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
return m_pTransformFilter->BeginFlush();
|
|
}
|
|
|
|
|
|
// leave flushing state.
|
|
// Pass to overridable method in filter, then call base class
|
|
// to unblock receives (finally)
|
|
STDMETHODIMP
|
|
CTransformInputPin::EndFlush(void)
|
|
{
|
|
CAutoLock lck(&m_pTransformFilter->m_csFilter);
|
|
// Are we actually doing anything?
|
|
ASSERT(m_pTransformFilter->m_pOutput != NULL);
|
|
if (!IsConnected() ||
|
|
!m_pTransformFilter->m_pOutput->IsConnected()) {
|
|
return VFW_E_NOT_CONNECTED;
|
|
}
|
|
|
|
HRESULT hr = m_pTransformFilter->EndFlush();
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
return CBaseInputPin::EndFlush();
|
|
}
|
|
|
|
|
|
// here's the next block of data from the stream.
|
|
// AddRef it yourself if you need to hold it beyond the end
|
|
// of this call.
|
|
|
|
HRESULT
|
|
CTransformInputPin::Receive(IMediaSample * pSample)
|
|
{
|
|
HRESULT hr;
|
|
CAutoLock lck(&m_pTransformFilter->m_csReceive);
|
|
ASSERT(pSample);
|
|
|
|
// check all is well with the base class
|
|
hr = CBaseInputPin::Receive(pSample);
|
|
if (S_OK == hr) {
|
|
hr = m_pTransformFilter->Receive(pSample);
|
|
}
|
|
return hr;
|
|
}
|
|
|
|
|
|
|
|
|
|
// override to pass downstream
|
|
STDMETHODIMP
|
|
CTransformInputPin::NewSegment(
|
|
REFERENCE_TIME tStart,
|
|
REFERENCE_TIME tStop,
|
|
double dRate)
|
|
{
|
|
// Save the values in the pin
|
|
CBasePin::NewSegment(tStart, tStop, dRate);
|
|
return m_pTransformFilter->NewSegment(tStart, tStop, dRate);
|
|
}
|
|
|
|
|
|
|
|
|
|
// =================================================================
|
|
// Implements the CTransformOutputPin class
|
|
// =================================================================
|
|
|
|
|
|
// constructor
|
|
|
|
CTransformOutputPin::CTransformOutputPin(
|
|
TCHAR *pObjectName,
|
|
CTransformFilter *pTransformFilter,
|
|
HRESULT * phr,
|
|
LPCWSTR pPinName)
|
|
: CBaseOutputPin(pObjectName, pTransformFilter, &pTransformFilter->m_csFilter, phr, pPinName),
|
|
m_pPosition(NULL)
|
|
{
|
|
DbgLog((LOG_TRACE,2,TEXT("CTransformOutputPin::CTransformOutputPin")));
|
|
m_pTransformFilter = pTransformFilter;
|
|
|
|
}
|
|
|
|
#ifdef UNICODE
|
|
CTransformOutputPin::CTransformOutputPin(
|
|
CHAR *pObjectName,
|
|
CTransformFilter *pTransformFilter,
|
|
HRESULT * phr,
|
|
LPCWSTR pPinName)
|
|
: CBaseOutputPin(pObjectName, pTransformFilter, &pTransformFilter->m_csFilter, phr, pPinName),
|
|
m_pPosition(NULL)
|
|
{
|
|
DbgLog((LOG_TRACE,2,TEXT("CTransformOutputPin::CTransformOutputPin")));
|
|
m_pTransformFilter = pTransformFilter;
|
|
|
|
}
|
|
#endif
|
|
|
|
// destructor
|
|
|
|
CTransformOutputPin::~CTransformOutputPin()
|
|
{
|
|
DbgLog((LOG_TRACE,2,TEXT("CTransformOutputPin::~CTransformOutputPin")));
|
|
|
|
if (m_pPosition) m_pPosition->Release();
|
|
}
|
|
|
|
|
|
// overriden to expose IMediaPosition and IMediaSeeking control interfaces
|
|
|
|
STDMETHODIMP
|
|
CTransformOutputPin::NonDelegatingQueryInterface(REFIID riid, void **ppv)
|
|
{
|
|
CheckPointer(ppv,E_POINTER);
|
|
ValidateReadWritePtr(ppv,sizeof(PVOID));
|
|
*ppv = NULL;
|
|
|
|
if (riid == IID_IMediaPosition || riid == IID_IMediaSeeking) {
|
|
|
|
// we should have an input pin by now
|
|
|
|
ASSERT(m_pTransformFilter->m_pInput != NULL);
|
|
|
|
if (m_pPosition == NULL) {
|
|
|
|
HRESULT hr = CreatePosPassThru(
|
|
GetOwner(),
|
|
FALSE,
|
|
(IPin *)m_pTransformFilter->m_pInput,
|
|
&m_pPosition);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
}
|
|
return m_pPosition->QueryInterface(riid, ppv);
|
|
} else {
|
|
return CBaseOutputPin::NonDelegatingQueryInterface(riid, ppv);
|
|
}
|
|
}
|
|
|
|
|
|
// provides derived filter a chance to grab extra interfaces
|
|
|
|
HRESULT
|
|
CTransformOutputPin::CheckConnect(IPin *pPin)
|
|
{
|
|
// we should have an input connection first
|
|
|
|
ASSERT(m_pTransformFilter->m_pInput != NULL);
|
|
if ((m_pTransformFilter->m_pInput->IsConnected() == FALSE)) {
|
|
return E_UNEXPECTED;
|
|
}
|
|
|
|
HRESULT hr = m_pTransformFilter->CheckConnect(PINDIR_OUTPUT,pPin);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
return CBaseOutputPin::CheckConnect(pPin);
|
|
}
|
|
|
|
|
|
// provides derived filter a chance to release it's extra interfaces
|
|
|
|
HRESULT
|
|
CTransformOutputPin::BreakConnect()
|
|
{
|
|
// Can't disconnect unless stopped
|
|
ASSERT(IsStopped());
|
|
m_pTransformFilter->BreakConnect(PINDIR_OUTPUT);
|
|
return CBaseOutputPin::BreakConnect();
|
|
}
|
|
|
|
|
|
// Let derived class know when the output pin is connected
|
|
|
|
HRESULT
|
|
CTransformOutputPin::CompleteConnect(IPin *pReceivePin)
|
|
{
|
|
HRESULT hr = m_pTransformFilter->CompleteConnect(PINDIR_OUTPUT,pReceivePin);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
return CBaseOutputPin::CompleteConnect(pReceivePin);
|
|
}
|
|
|
|
|
|
// check a given transform - must have selected input type first
|
|
|
|
HRESULT
|
|
CTransformOutputPin::CheckMediaType(const CMediaType* pmtOut)
|
|
{
|
|
// must have selected input first
|
|
ASSERT(m_pTransformFilter->m_pInput != NULL);
|
|
if ((m_pTransformFilter->m_pInput->IsConnected() == FALSE)) {
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
return m_pTransformFilter->CheckTransform(
|
|
&m_pTransformFilter->m_pInput->CurrentMediaType(),
|
|
pmtOut);
|
|
}
|
|
|
|
|
|
// called after we have agreed a media type to actually set it in which case
|
|
// we run the CheckTransform function to get the output format type again
|
|
|
|
HRESULT
|
|
CTransformOutputPin::SetMediaType(const CMediaType* pmtOut)
|
|
{
|
|
HRESULT hr = NOERROR;
|
|
ASSERT(m_pTransformFilter->m_pInput != NULL);
|
|
|
|
ASSERT(m_pTransformFilter->m_pInput->CurrentMediaType().IsValid());
|
|
|
|
// Set the base class media type (should always succeed)
|
|
hr = CBasePin::SetMediaType(pmtOut);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (FAILED(m_pTransformFilter->CheckTransform(&m_pTransformFilter->
|
|
m_pInput->CurrentMediaType(),pmtOut))) {
|
|
DbgLog((LOG_ERROR,0,TEXT("*** This filter is accepting an output media type")));
|
|
DbgLog((LOG_ERROR,0,TEXT(" that it can't currently transform to. I hope")));
|
|
DbgLog((LOG_ERROR,0,TEXT(" it's smart enough to reconnect its input.")));
|
|
}
|
|
#endif
|
|
|
|
return m_pTransformFilter->SetMediaType(PINDIR_OUTPUT,pmtOut);
|
|
}
|
|
|
|
|
|
// pass the buffer size decision through to the main transform class
|
|
|
|
HRESULT
|
|
CTransformOutputPin::DecideBufferSize(
|
|
IMemAllocator * pAllocator,
|
|
ALLOCATOR_PROPERTIES* pProp)
|
|
{
|
|
return m_pTransformFilter->DecideBufferSize(pAllocator, pProp);
|
|
}
|
|
|
|
|
|
|
|
// return a specific media type indexed by iPosition
|
|
|
|
HRESULT
|
|
CTransformOutputPin::GetMediaType(
|
|
int iPosition,
|
|
CMediaType *pMediaType)
|
|
{
|
|
ASSERT(m_pTransformFilter->m_pInput != NULL);
|
|
|
|
// We don't have any media types if our input is not connected
|
|
|
|
if (m_pTransformFilter->m_pInput->IsConnected()) {
|
|
return m_pTransformFilter->GetMediaType(iPosition,pMediaType);
|
|
} else {
|
|
return VFW_S_NO_MORE_ITEMS;
|
|
}
|
|
}
|
|
|
|
|
|
// Override this if you can do something constructive to act on the
|
|
// quality message. Consider passing it upstream as well
|
|
|
|
// Pass the quality mesage on upstream.
|
|
|
|
STDMETHODIMP
|
|
CTransformOutputPin::Notify(IBaseFilter * pSender, Quality q)
|
|
{
|
|
UNREFERENCED_PARAMETER(pSender);
|
|
ValidateReadPtr(pSender,sizeof(IBaseFilter));
|
|
|
|
// First see if we want to handle this ourselves
|
|
HRESULT hr = m_pTransformFilter->AlterQuality(q);
|
|
if (hr!=S_FALSE) {
|
|
return hr; // either S_OK or a failure
|
|
}
|
|
|
|
// S_FALSE means we pass the message on.
|
|
// Find the quality sink for our input pin and send it there
|
|
|
|
ASSERT(m_pTransformFilter->m_pInput != NULL);
|
|
|
|
return m_pTransformFilter->m_pInput->PassNotify(q);
|
|
|
|
} // Notify
|
|
|
|
|
|
// the following removes a very large number of level 4 warnings from the microsoft
|
|
// compiler output, which are not useful at all in this case.
|
|
#pragma warning(disable:4514)
|