GraphBuildingDlg.cpp
上传用户:hhs829
上传日期:2022-06-17
资源大小:586k
文件大小:14k
- // GraphBuildingDlg.cpp : implementation file
- //
- #include "stdafx.h"
- #include "GraphBuilding.h"
- #include "GraphBuildingDlg.h"
- #ifdef _DEBUG
- #define new DEBUG_NEW
- #undef THIS_FILE
- static char THIS_FILE[] = __FILE__;
- #endif
- /////////////////////////////////////////////////////////////////////////////
- // CGraphBuildingDlg dialog
- CGraphBuildingDlg::CGraphBuildingDlg(CWnd* pParent /*=NULL*/)
- : CDialog(CGraphBuildingDlg::IDD, pParent)
- {
- //{{AFX_DATA_INIT(CGraphBuildingDlg)
- // NOTE: the ClassWizard will add member initialization here
- //}}AFX_DATA_INIT
- // Note that LoadIcon does not require a subsequent DestroyIcon in Win32
- m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
- }
- void CGraphBuildingDlg::DoDataExchange(CDataExchange* pDX)
- {
- CDialog::DoDataExchange(pDX);
- //{{AFX_DATA_MAP(CGraphBuildingDlg)
- // NOTE: the ClassWizard will add DDX and DDV calls here
- //}}AFX_DATA_MAP
- }
- BEGIN_MESSAGE_MAP(CGraphBuildingDlg, CDialog)
- //{{AFX_MSG_MAP(CGraphBuildingDlg)
- ON_WM_PAINT()
- ON_WM_QUERYDRAGICON()
- ON_BN_CLICKED(IDC_BUTTON_TEST, OnButtonTest)
- //}}AFX_MSG_MAP
- END_MESSAGE_MAP()
- /////////////////////////////////////////////////////////////////////////////
- // CGraphBuildingDlg message handlers
- BOOL CGraphBuildingDlg::OnInitDialog()
- {
- CDialog::OnInitDialog();
- // Set the icon for this dialog. The framework does this automatically
- // when the application's main window is not a dialog
- SetIcon(m_hIcon, TRUE); // Set big icon
- SetIcon(m_hIcon, FALSE); // Set small icon
-
- // TODO: Add extra initialization here
-
- return TRUE; // return TRUE unless you set the focus to a control
- }
- // If you add a minimize button to your dialog, you will need the code below
- // to draw the icon. For MFC applications using the document/view model,
- // this is automatically done for you by the framework.
- void CGraphBuildingDlg::OnPaint()
- {
- if (IsIconic())
- {
- CPaintDC dc(this); // device context for painting
- SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
- // Center icon in client rectangle
- int cxIcon = GetSystemMetrics(SM_CXICON);
- int cyIcon = GetSystemMetrics(SM_CYICON);
- CRect rect;
- GetClientRect(&rect);
- int x = (rect.Width() - cxIcon + 1) / 2;
- int y = (rect.Height() - cyIcon + 1) / 2;
- // Draw the icon
- dc.DrawIcon(x, y, m_hIcon);
- }
- else
- {
- CDialog::OnPaint();
- }
- }
- // The system calls this to obtain the cursor to display while the user drags
- // the minimized window.
- HCURSOR CGraphBuildingDlg::OnQueryDragIcon()
- {
- return (HCURSOR) m_hIcon;
- }
- //////////////////////////////////////////////////////////////////////////////
- ///////////////////// Graph building methods /////////////////////////////////
- HRESULT AddFilterByCLSID(
- IGraphBuilder *pGraph, // Pointer to the Filter Graph Manager.
- const GUID& clsid, // CLSID of the filter to create.
- LPCWSTR wszName, // A name for the filter.
- IBaseFilter **ppF) // Receives a pointer to the filter.
- {
- if (!pGraph || ! ppF) return E_POINTER;
- *ppF = 0;
- IBaseFilter *pF = 0;
- HRESULT hr = CoCreateInstance(clsid, 0, CLSCTX_INPROC_SERVER,
- IID_IBaseFilter, reinterpret_cast<void**>(&pF));
- if (SUCCEEDED(hr))
- {
- hr = pGraph->AddFilter(pF, wszName);
- if (SUCCEEDED(hr))
- *ppF = pF;
- else
- pF->Release();
- }
- return hr;
- }
- HRESULT GetUnconnectedPin(
- IBaseFilter *pFilter, // Pointer to the filter.
- PIN_DIRECTION PinDir, // Direction of the pin to find.
- IPin **ppPin) // Receives a pointer to the pin.
- {
- *ppPin = 0;
- IEnumPins *pEnum = 0;
- IPin *pPin = 0;
- HRESULT hr = pFilter->EnumPins(&pEnum);
- if (FAILED(hr))
- {
- return hr;
- }
- while (pEnum->Next(1, &pPin, NULL) == S_OK)
- {
- PIN_DIRECTION ThisPinDir;
- pPin->QueryDirection(&ThisPinDir);
- if (ThisPinDir == PinDir)
- {
- IPin *pTmp = 0;
- hr = pPin->ConnectedTo(&pTmp);
- if (SUCCEEDED(hr)) // Already connected, not the pin we want.
- {
- pTmp->Release();
- }
- else // Unconnected, this is the pin we want.
- {
- pEnum->Release();
- *ppPin = pPin;
- return S_OK;
- }
- }
- pPin->Release();
- }
- pEnum->Release();
- // Did not find a matching pin.
- return E_FAIL;
- }
- HRESULT ConnectFilters(
- IGraphBuilder *pGraph, // Filter Graph Manager.
- IPin *pOut, // Output pin on the upstream filter.
- IBaseFilter *pDest) // Downstream filter.
- {
- if ((pGraph == NULL) || (pOut == NULL) || (pDest == NULL))
- {
- return E_POINTER;
- }
- #ifdef debug
- PIN_DIRECTION PinDir;
- pOut->QueryDirection(&PinDir);
- _ASSERTE(PinDir == PINDIR_OUTPUT);
- #endif
- // Find an input pin on the downstream filter.
- IPin *pIn = 0;
- HRESULT hr = GetUnconnectedPin(pDest, PINDIR_INPUT, &pIn);
- if (FAILED(hr))
- {
- return hr;
- }
- // Try to connect them.
- hr = pGraph->Connect(pOut, pIn);
- pIn->Release();
- return hr;
- }
- HRESULT ConnectFilters(
- IGraphBuilder *pGraph,
- IBaseFilter *pSrc,
- IBaseFilter *pDest)
- {
- if ((pGraph == NULL) || (pSrc == NULL) || (pDest == NULL))
- {
- return E_POINTER;
- }
- // Find an output pin on the first filter.
- IPin *pOut = 0;
- HRESULT hr = GetUnconnectedPin(pSrc, PINDIR_OUTPUT, &pOut);
- if (FAILED(hr))
- {
- return hr;
- }
- hr = ConnectFilters(pGraph, pOut, pDest);
- pOut->Release();
- return hr;
- }
- HRESULT FindFilterInterface(
- IGraphBuilder *pGraph, // Pointer to the Filter Graph Manager.
- REFGUID iid, // IID of the interface to retrieve.
- void **ppUnk) // Receives the interface pointer.
- {
- if (!pGraph || !ppUnk) return E_POINTER;
- HRESULT hr = E_FAIL;
- IEnumFilters *pEnum = NULL;
- IBaseFilter *pF = NULL;
- if (FAILED(pGraph->EnumFilters(&pEnum)))
- {
- return E_FAIL;
- }
- // Query every filter for the interface.
- while (S_OK == pEnum->Next(1, &pF, 0))
- {
- hr = pF->QueryInterface(iid, ppUnk);
- pF->Release();
- if (SUCCEEDED(hr))
- {
- break;
- }
- }
- pEnum->Release();
- return hr;
- }
- HRESULT FindPinInterface(
- IBaseFilter *pFilter, // Pointer to the filter to search.
- REFGUID iid, // IID of the interface.
- void **ppUnk) // Receives the interface pointer.
- {
- if (!pFilter || !ppUnk) return E_POINTER;
- HRESULT hr = E_FAIL;
- IEnumPins *pEnum = 0;
- if (FAILED(pFilter->EnumPins(&pEnum)))
- {
- return E_FAIL;
- }
- // Query every pin for the interface.
- IPin *pPin = 0;
- while (S_OK == pEnum->Next(1, &pPin, 0))
- {
- hr = pPin->QueryInterface(iid, ppUnk);
- pPin->Release();
- if (SUCCEEDED(hr))
- {
- break;
- }
- }
- pEnum->Release();
- return hr;
- }
- HRESULT FindInterfaceAnywhere(
- IGraphBuilder *pGraph,
- REFGUID iid,
- void **ppUnk)
- {
- if (!pGraph || !ppUnk) return E_POINTER;
- HRESULT hr = E_FAIL;
- IEnumFilters *pEnum = 0;
- if (FAILED(pGraph->EnumFilters(&pEnum)))
- {
- return E_FAIL;
- }
- // Loop through every filter in the graph.
- IBaseFilter *pF = 0;
- while (S_OK == pEnum->Next(1, &pF, 0))
- {
- hr = pF->QueryInterface(iid, ppUnk);
- if (FAILED(hr))
- {
- // The filter does not expose the interface, but maybe
- // one of its pins does.
- hr = FindPinInterface(pF, iid, ppUnk);
- }
- pF->Release();
- if (SUCCEEDED(hr))
- {
- break;
- }
- }
- pEnum->Release();
- return hr;
- }
- // Get the first upstream or downstream filter
- HRESULT GetNextFilter(
- IBaseFilter *pFilter, // Pointer to the starting filter
- PIN_DIRECTION Dir, // Direction to search (upstream or downstream)
- IBaseFilter **ppNext) // Receives a pointer to the next filter.
- {
- if (!pFilter || !ppNext) return E_POINTER;
- IEnumPins *pEnum = 0;
- IPin *pPin = 0;
- HRESULT hr = pFilter->EnumPins(&pEnum);
- if (FAILED(hr)) return hr;
- while (S_OK == pEnum->Next(1, &pPin, 0))
- {
- // See if this pin matches the specified direction.
- PIN_DIRECTION ThisPinDir;
- hr = pPin->QueryDirection(&ThisPinDir);
- if (FAILED(hr))
- {
- // Something strange happened.
- hr = E_UNEXPECTED;
- pPin->Release();
- break;
- }
- if (ThisPinDir == Dir)
- {
- // Check if the pin is connected to another pin.
- IPin *pPinNext = 0;
- hr = pPin->ConnectedTo(&pPinNext);
- if (SUCCEEDED(hr))
- {
- // Get the filter that owns that pin.
- PIN_INFO PinInfo;
- hr = pPinNext->QueryPinInfo(&PinInfo);
- pPinNext->Release();
- pPin->Release();
- pEnum->Release();
- if (FAILED(hr) || (PinInfo.pFilter == NULL))
- {
- // Something strange happened.
- return E_UNEXPECTED;
- }
- // This is the filter we're looking for.
- *ppNext = PinInfo.pFilter; // Client must release.
- return S_OK;
- }
- }
- pPin->Release();
- }
- pEnum->Release();
- // Did not find a matching filter.
- return E_FAIL;
- }
- // Define a typedef for a list of filters.
- typedef CGenericList<IBaseFilter> CFilterList;
- // Forward declaration. Adds a filter to the list unless it's a duplicate.
- void AddFilterUnique(CFilterList &FilterList, IBaseFilter *pNew);
- // Find all the immediate upstream or downstream peers of a filter.
- HRESULT GetPeerFilters(
- IBaseFilter *pFilter, // Pointer to the starting filter
- PIN_DIRECTION Dir, // Direction to search (upstream or downstream)
- CFilterList &FilterList) // Collect the results in this list.
- {
- if (!pFilter) return E_POINTER;
- IEnumPins *pEnum = 0;
- IPin *pPin = 0;
- HRESULT hr = pFilter->EnumPins(&pEnum);
- if (FAILED(hr)) return hr;
- while (S_OK == pEnum->Next(1, &pPin, 0))
- {
- // See if this pin matches the specified direction.
- PIN_DIRECTION ThisPinDir;
- hr = pPin->QueryDirection(&ThisPinDir);
- if (FAILED(hr))
- {
- // Something strange happened.
- hr = E_UNEXPECTED;
- pPin->Release();
- break;
- }
- if (ThisPinDir == Dir)
- {
- // Check if the pin is connected to another pin.
- IPin *pPinNext = 0;
- hr = pPin->ConnectedTo(&pPinNext);
- if (SUCCEEDED(hr))
- {
- // Get the filter that owns that pin.
- PIN_INFO PinInfo;
- hr = pPinNext->QueryPinInfo(&PinInfo);
- pPinNext->Release();
- if (FAILED(hr) || (PinInfo.pFilter == NULL))
- {
- // Something strange happened.
- pPin->Release();
- pEnum->Release();
- return E_UNEXPECTED;
- }
- // Insert the filter into the list.
- AddFilterUnique(FilterList, PinInfo.pFilter);
- PinInfo.pFilter->Release();
- }
- }
- pPin->Release();
- }
- pEnum->Release();
- return S_OK;
- }
- void AddFilterUnique(CFilterList &FilterList, IBaseFilter *pNew)
- {
- if (pNew == NULL) return;
- POSITION pos = FilterList.GetHeadPosition();
- while (pos)
- {
- IBaseFilter *pF = FilterList.GetNext(pos);
- if (IsEqualObject(pF, pNew))
- {
- return;
- }
- }
- pNew->AddRef(); // The caller must release everything in the list.
- FilterList.AddTail(pNew);
- }
- // Tear down everything downstream of a given filter
- void NukeDownstream(IGraphBuilder * inGraph, IBaseFilter * inFilter)
- {
- if (inGraph && inFilter)
- {
- IEnumPins * pinEnum = 0;
- if (SUCCEEDED(inFilter->EnumPins(&pinEnum)))
- {
- pinEnum->Reset();
- IPin * pin = 0;
- ULONG cFetched = 0;
- bool pass = true;
- while (pass && SUCCEEDED(pinEnum->Next(1, &pin, &cFetched)))
- {
- if (pin && cFetched)
- {
- IPin * connectedPin = 0;
- pin->ConnectedTo(&connectedPin);
- if(connectedPin)
- {
- PIN_INFO pininfo;
- if (SUCCEEDED(connectedPin->QueryPinInfo(&pininfo)))
- {
- if(pininfo.dir == PINDIR_INPUT)
- {
- NukeDownstream(inGraph, pininfo.pFilter);
- inGraph->Disconnect(connectedPin);
- inGraph->Disconnect(pin);
- inGraph->RemoveFilter(pininfo.pFilter);
- }
- pininfo.pFilter->Release();
- }
- connectedPin->Release();
- }
- pin->Release();
- }
- else
- {
- pass = false;
- }
- }
- pinEnum->Release();
- }
- }
- }
- // Tear down everything upstream of a given filter
- void NukeUpstream(IGraphBuilder * inGraph, IBaseFilter * inFilter)
- {
- if (inGraph && inFilter)
- {
- IEnumPins * pinEnum = 0;
- if (SUCCEEDED(inFilter->EnumPins(&pinEnum)))
- {
- pinEnum->Reset();
- IPin * pin = 0;
- ULONG cFetched = 0;
- bool pass = true;
- while (pass && SUCCEEDED(pinEnum->Next(1, &pin, &cFetched)))
- {
- if (pin && cFetched)
- {
- IPin * connectedPin = 0;
- pin->ConnectedTo(&connectedPin);
- if(connectedPin)
- {
- PIN_INFO pininfo;
- if (SUCCEEDED(connectedPin->QueryPinInfo(&pininfo)))
- {
- if(pininfo.dir == PINDIR_OUTPUT)
- {
- NukeUpstream(inGraph, pininfo.pFilter);
- inGraph->Disconnect(connectedPin);
- inGraph->Disconnect(pin);
- inGraph->RemoveFilter(pininfo.pFilter);
- }
- pininfo.pFilter->Release();
- }
- connectedPin->Release();
- }
- pin->Release();
- }
- else
- {
- pass = false;
- }
- }
- pinEnum->Release();
- }
- }
- }
- /////////////////////////////////////////////////////////////////////////////
- void CGraphBuildingDlg::OnButtonTest()
- {
- // TODO: Add your control notification handler code here
-
- }