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// // CDXGraph.cpp // #include "stdafx.h" #include "CDXGraph.h" #include "GlobalDefs.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif //////////////////////////////////////////////////////////////////////////////// CDXGraph::CDXGraph() { //初始化 mGraph = NULL; mMediaControl = NULL; mEvent = NULL; mBasicVideo = NULL; mBasicAudio = NULL; mVideoWindow = NULL; mSeeking = NULL; mObjectTableEntry = 0; mGraphState = GS_Stopped; } CDXGraph::~CDXGraph() { Release(); } //创建一个CDXGraph BOOL CDXGraph::Create(void) { if (!mGraph) { if (SUCCEEDED(CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&mGraph))) { AddToObjectTable(); return QueryInterfaces(); } mGraph = NULL; } return FALSE; } //询问接口 BOOL CDXGraph::QueryInterfaces(void) { if (mGraph) { HRESULT hr = NOERROR; hr |= mGraph->QueryInterface(IID_IMediaControl, (void **)&mMediaControl); hr |= mGraph->QueryInterface(IID_IMediaEventEx, (void **)&mEvent); hr |= mGraph->QueryInterface(IID_IBasicVideo, (void **)&mBasicVideo); hr |= mGraph->QueryInterface(IID_IBasicAudio, (void **)&mBasicAudio); hr |= mGraph->QueryInterface(IID_IVideoWindow, (void **)&mVideoWindow); hr |= mGraph->QueryInterface(IID_IMediaSeeking, (void **)&mSeeking); if (mSeeking) { mSeeking->SetTimeFormat(&TIME_FORMAT_MEDIA_TIME); } return SUCCEEDED(hr); } return FALSE; } //释放部分CDXGraph void CDXGraph::Release(void) { if (mSeeking) { mSeeking->Release(); mSeeking = NULL; } if (mMediaControl) { mMediaControl->Release(); mMediaControl = NULL; } if (mEvent) { mEvent->Release(); mEvent = NULL; } if (mBasicVideo) { mBasicVideo->Release(); mBasicVideo = NULL; } if (mBasicAudio) { mBasicAudio->Release(); mBasicAudio = NULL; } if (mVideoWindow) { mVideoWindow->put_Visible(OAFALSE); mVideoWindow->put_MessageDrain((OAHWND)NULL); mVideoWindow->put_Owner(OAHWND(0)); mVideoWindow->Release(); mVideoWindow = NULL; } RemoveFromObjectTable(); if (mGraph) { mGraph->Release(); mGraph = 0; } } BOOL CDXGraph::Attach(IGraphBuilder * inGraphBuilder) { Release(); if (inGraphBuilder) { mGraph = inGraphBuilder; mGraph->AddRef(); AddToObjectTable(); return QueryInterfaces(); } return TRUE; } IGraphBuilder * CDXGraph::GetGraph(void) { return mGraph; } BOOL CDXGraph::AddFilter(IBaseFilter * inFilter, LPCWSTR inName) { if (mGraph) { HRESULT hr = mGraph->AddFilter(inFilter, inName); return SUCCEEDED(hr); } return FALSE; } //把 filter 从上游指针连接到下游的指针 BOOL CDXGraph::ConnectFilters(IPin * inOutputPin, IPin * inInputPin, const AM_MEDIA_TYPE * inMediaType) { if (mGraph && inOutputPin && inInputPin) { HRESULT hr = mGraph->ConnectDirect(inOutputPin, inInputPin, inMediaType); return SUCCEEDED(hr) ? TRUE : FALSE; } return FALSE; } void CDXGraph::DisconnectFilters(IPin * inOutputPin) { if (mGraph && inOutputPin) { HRESULT hr = mGraph->Disconnect(inOutputPin); } } //设置显示窗口 BOOL CDXGraph::SetDisplayWindow(HWND inWindow) { if (mVideoWindow) { // 长 lVisible; // mVideoWindow->get_Visible(&lVisible); // 首先掩藏视频窗口 mVideoWindow->put_Visible(OAFALSE); mVideoWindow->put_Owner((OAHWND)inWindow); RECT windowRect; ::GetClientRect(inWindow, &windowRect); mVideoWindow->put_Left(0); mVideoWindow->put_Top(0); mVideoWindow->put_Width(windowRect.right - windowRect.left); mVideoWindow->put_Height(windowRect.bottom - windowRect.top); mVideoWindow->put_WindowStyle(WS_CHILD|WS_CLIPCHILDREN|WS_CLIPSIBLINGS); mVideoWindow->put_MessageDrain((OAHWND) inWindow); // 恢复视频窗口 if (inWindow != NULL) { // mVideoWindow->put_Visible(lVisible); mVideoWindow->put_Visible(OATRUE); } else { mVideoWindow->put_Visible(OAFALSE); } return TRUE; } return FALSE; } BOOL CDXGraph::ResizeVideoWindow(long inLeft, long inTop, long inWidth, long inHeight) { if (mVideoWindow) { long lVisible = OATRUE; mVideoWindow->get_Visible(&lVisible); // 首先掩藏视频窗口 mVideoWindow->put_Visible(OAFALSE); mVideoWindow->put_Left(inLeft); mVideoWindow->put_Top(inTop); mVideoWindow->put_Width(inWidth); mVideoWindow->put_Height(inHeight); // 恢复视频窗口 mVideoWindow->put_Visible(lVisible); return TRUE; } return FALSE; } //设置提示窗口 BOOL CDXGraph::SetNotifyWindow(HWND inWindow) { if (mEvent) { mEvent->SetNotifyWindow((OAHWND)inWindow, WM_GRAPHNOTIFY, 0); return TRUE; } return FALSE; } void CDXGraph::HandleEvent(WPARAM inWParam, LPARAM inLParam) { if (mEvent) { LONG eventCode = 0, eventParam1 = 0, eventParam2 = 0; while (SUCCEEDED(mEvent->GetEvent(&eventCode, &eventParam1, &eventParam2, 0))) { mEvent->FreeEventParams(eventCode, eventParam1, eventParam2); switch (eventCode) { case EC_COMPLETE: case EC_USERABORT: case EC_ERRORABORT: Broadcast(msg_FilterGraphError); break; case EC_DEVICE_LOST: // 因为，窗口首先将处理设备失去的事件。 //我们在DirectShow不需要再处理这个事件的。 if (eventParam2 == 0) { // Broadcast(msg_DShowDeviceLost, &eventParam1); } break; default: break; } } } } //运行采集设备的自检 BOOL CDXGraph::Run(void) { if (mGraph && mMediaControl) { if (!IsRunning()) { if (SUCCEEDED(mMediaControl->Run())) { mGraphState = GS_Running; return TRUE; } } else { return TRUE; } } return FALSE; } //停止采集设备的自检 BOOL CDXGraph::Stop(void) { if (mGraph && mMediaControl) { if (!IsStopped()) { if (SUCCEEDED(mMediaControl->Stop())) { mGraphState = GS_Stopped; return TRUE; } } else { return TRUE; } } return FALSE; } //暂停采集设备的自检 BOOL CDXGraph::Pause(void) { if (mGraph && mMediaControl) { if (!IsPaused()) { if (SUCCEEDED(mMediaControl->Pause())) { mGraphState = GS_Paused; return TRUE; } } else { return TRUE; } } return FALSE; } BOOL CDXGraph::IsRunning(void) { /* if (mGraph && mMediaControl) { OAFilterState state = State_Stopped; if (SUCCEEDED(mMediaControl->GetState(10, &state))) { return state == State_Running; } } return FALSE;*/ return (mGraphState == GS_Running); } BOOL CDXGraph::IsStopped(void) { /* if (mGraph && mMediaControl) { OAFilterState state = State_Stopped; if (SUCCEEDED(mMediaControl->GetState(10, &state))) { return state == State_Stopped; } } return FALSE;*/ return (mGraphState == GS_Stopped); } BOOL CDXGraph::IsPaused(void) { /* if (mGraph && mMediaControl) { OAFilterState state = State_Stopped; if (SUCCEEDED(mMediaControl->GetState(10, &state))) { return state == State_Paused; } } return FALSE;*/ return (mGraphState == GS_Paused); } //设置整个显示屏幕 BOOL CDXGraph::SetFullScreen(BOOL inEnabled) { if (mVideoWindow) { HRESULT hr = mVideoWindow->put_FullScreenMode(inEnabled ? OATRUE : OAFALSE); return SUCCEEDED(hr); } return FALSE; } BOOL CDXGraph::GetFullScreen(void) { if (mVideoWindow) { long fullScreenMode = OAFALSE; mVideoWindow->get_FullScreenMode(&fullScreenMode); return (fullScreenMode == OATRUE); } return FALSE; } //？？？？？ BOOL CDXGraph::SetSyncSource(IBaseFilter * inFilter) { if (inFilter) { IReferenceClock *pClock = 0; inFilter->QueryInterface(IID_IReferenceClock, (void**)&pClock); if (pClock) { // 设置 graph控制时钟 IMediaFilter *pMediaFilter = 0; mGraph->QueryInterface(IID_IMediaFilter, (void**)&pMediaFilte