References ▼
The following code demonstrates an advanced capture application. It utilizes most of the functions available in the ltmmCapture object.
// define helper macros for using interfaces under C#ifndef COBJMACROS#define COBJMACROS#endif#define UNUSED_PARAMETER(x) (void) (x)// include the LEAD Multimedia TOOLKIT header#include "ltmm.h"#include "resource.h"#include <tchar.h>#include <stdio.h>#include <olectl.h>#include <math.h>#include <assert.h>#define SZ_WNDCLASS_CAPTURE _T("CAPTURE WNDCLASS")#define WM_CAPTURENOTIFY (WM_USER + 1000)HINSTANCE g_hInstance; // application instance handleHWND g_hwndCapture; // video frame windowIltmmCapture* g_pCapture; // capture object interface pointer//// FreeTarget// resets target and free asssociated resources//void FreeTarget(void){long type;VARIANT var;IltmmCapture_get_TargetType(g_pCapture, &type);if(type == ltmmCapture_Target_Array){IltmmCapture_get_TargetArray(g_pCapture, &var);IltmmCapture_ResetTarget(g_pCapture);VariantClear(&var);}else{IltmmCapture_ResetTarget (g_pCapture);}}//// SnapFrameToVideo// resizes the frame window to match the video width and height//void SnapFrameToVideo(void){HWND hwnd;RECT rcWindow, rcClient;long cx, cy;// get the frame windowIltmmCapture_get_VideoWindowFrame(g_pCapture, (long*) &hwnd);// get the video dimensionsIltmmCapture_get_VideoWidth(g_pCapture, &cx);IltmmCapture_get_VideoHeight(g_pCapture, &cy);// adjust by the border dimensionsGetWindowRect(hwnd, &rcWindow);GetClientRect(hwnd, &rcClient);cx += ((rcWindow.right - rcWindow.left) - (rcClient.right - rcClient.left));cy += ((rcWindow.bottom - rcWindow.top) - (rcClient.bottom - rcClient.top));// resize the windowSetWindowPos(hwnd, NULL, 0, 0, cx, cy, SWP_NOMOVE | SWP_NOZORDER);}//// CaptureWndProc// video frame window procedure//LRESULT CALLBACK CaptureWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){VARIANT_BOOL f;HRESULT hr;HGLOBAL hDIB;IPictureDisp* pPictureDisp;BSTR bstr;IltmmDevices* pDevices;IltmmTargetDevices* pTargetDevices;long index;IltmmCompressors* pCompressors;long l;long l2;BOOL fActive;ltmmSizeMode sm;TCHAR sz[2048];LPTSTR p;double d;VARIANT var;long x, y, cx, cy;RECT rc;POINT pt;IltmmVCRControl* pVCR;switch (message){case WM_CREATE:g_hwndCapture = hwnd;// window is the video window frameIltmmCapture_put_VideoWindowFrame(g_pCapture, (long) hwnd);// want notification messages as wellIltmmCapture_SetNotifyWindow(g_pCapture, (long) hwnd, WM_CAPTURENOTIFY);// set preview source video onlyIltmmCapture_put_PreviewSource(g_pCapture, ltmmCapture_Preview_Video);// enable previewIltmmCapture_put_Preview(g_pCapture, VARIANT_TRUE);// preview is visibleIltmmCapture_put_PreviewVisible(g_pCapture, VARIANT_TRUE);// disable close captioningIltmmCapture_put_CloseCaptioning(g_pCapture, VARIANT_FALSE);// assign initial frame delayIltmmCapture_put_FrameDelay(g_pCapture, 1.0);// assign a target filebstr = SysAllocString(MAKE_MEDIA_PATH("target.avi"));IltmmCapture_put_TargetFile(g_pCapture, bstr);SysFreeString(bstr);// select the LEAD video compressorIltmmCapture_get_VideoCompressors(g_pCapture, &pCompressors);bstr = SysAllocString(L"@device:sw:{33D9A760-90C8-11D0-BD43-00A0C911CE86}\\LEAD MCMP/MJPEG Codec (2.0)");IltmmCompressors_Find(pCompressors, bstr, &index);SysFreeString(bstr);if(index >= 0)IltmmCompressors_put_Selection(pCompressors, index);IUnknown_Release(pCompressors);// select the MP3 audio video compressorIltmmCapture_get_AudioCompressors(g_pCapture, &pCompressors);bstr = SysAllocString(L"@device:cm:{33D9A761-90C8-11D0-BD43-00A0C911CE86}\\85MPEG Layer-3");IltmmCompressors_Find(pCompressors, bstr, &index);SysFreeString(bstr);if(index >= 0)IltmmCompressors_put_Selection(pCompressors, index);IUnknown_Release(pCompressors);// target format is AVIIltmmCapture_put_TargetFormat(g_pCapture, ltmmCapture_TargetFormat_Avi);// preallocate file to 10 MBIltmmCapture_AllocTarget(g_pCapture, 10);// select the first audio device availableIltmmCapture_get_AudioDevices(g_pCapture, &pDevices);IltmmDevices_put_Selection(pDevices, 0);IUnknown_Release(pDevices);// select the first video device availableIltmmCapture_get_VideoDevices(g_pCapture, &pDevices);IltmmDevices_put_Selection(pDevices, 0);IUnknown_Release(pDevices);SnapFrameToVideo();return 0;break;case WM_CAPTURENOTIFY:switch(wParam){case ltmmCapture_Notify_Started:_stprintf(sz, _T("Started"));SetWindowText(hwnd, sz);break;case ltmmCapture_Notify_Complete:// stop recording, if vcr outputIltmmCapture_get_TargetVCRControl(g_pCapture, &pVCR);IltmmVCRControl_Stop(pVCR);IUnknown_Release(pVCR);IltmmCapture_get_Mode(g_pCapture, &l);if(l == ltmmCapture_Mode_Still){_stprintf(sz, _T("Complete - [still]"));}else{IltmmCapture_get_TargetType(g_pCapture, &l);if(l == ltmmCapture_Target_Array){_stprintf(sz, _T("Complete - [array]"));}else if(l == ltmmCapture_Target_Device){_stprintf(sz, _T("Complete - [device]"));}else{IltmmCapture_get_TargetFile(g_pCapture, &bstr);_stprintf(sz, _T("Complete - [%ls]"), bstr);SysFreeString(bstr);}}SetWindowText(hwnd, sz);break;case ltmmCapture_Notify_ErrorAbort:// stop recording, if vcr outputIltmmCapture_get_TargetVCRControl(g_pCapture, &pVCR);IltmmVCRControl_Stop (pVCR);IUnknown_Release(pVCR);_stprintf(sz, _T("Error 0x%.8X. Capture stopped."), lParam);MessageBox(hwnd, sz, _T("Play"), MB_ICONEXCLAMATION | MB_OK);break;case ltmmCapture_Notify_Progress:p = sz;*p = _T('\0');hr = IltmmCapture_get_NumDropped(g_pCapture, &l);if(SUCCEEDED(hr)){if(p != sz)p += _stprintf(p, _T(", "));p += _stprintf(p, _T("Dropped: %d"), l);}hr = IltmmCapture_get_NumNotDropped(g_pCapture, &l);if(SUCCEEDED(hr)){if(p != sz)p += _stprintf(p, _T(", "));p += _stprintf(p, _T("Not Dropped: %d"), l);}hr = IltmmCapture_get_AverageFrameSize(g_pCapture, &l);if(SUCCEEDED(hr)){if(p != sz)p += _stprintf(p, _T(", "));p += _stprintf(p, _T("Frame Size: %d"), l);}IltmmCapture_get_Mode(g_pCapture, &l);if(l != ltmmCapture_Mode_Still || l != ltmmCapture_Mode_ManualFrames){// only display the capture time for free running captureshr = IltmmCapture_get_CaptureTime(g_pCapture, &d);if(SUCCEEDED(hr)){if(p != sz)p += _stprintf(p, _T(", "));p += _stprintf(p, _T("Time: %f"), d);}}SetWindowText(hwnd, sz);break;}return 0;break;case WM_KEYDOWN:if(wParam == VK_ESCAPE){// if fullscreen mode then exit itIltmmCapture_get_FullScreenMode(g_pCapture, &f);if(f){IltmmCapture_put_FullScreenMode(g_pCapture, VARIANT_FALSE);return 0;}}break;case WM_DESTROY:// no more notificationsFreeTarget();IltmmCapture_SetNotifyWindow(g_pCapture, (long) NULL, 0);PostQuitMessage(0);break;case WM_INITMENUPOPUP:if(GetSubMenu(GetMenu(hwnd), 0) == (HMENU)wParam){// determine whether the object is activeIltmmCapture_get_State(g_pCapture, &l);fActive = (l == ltmmCapture_State_Pending || l == ltmmCapture_State_Running || l == ltmmCapture_State_Paused);// enable stop if activeEnableMenuItem((HMENU) wParam, ID_CONTROL_STOPCAPTURE, fActive ? MF_ENABLED : MF_GRAYED);// enable run if pausedEnableMenuItem((HMENU) wParam, ID_CONTROL_RUN, (l == ltmmCapture_State_Paused) ? MF_ENABLED : MF_GRAYED);// enable pause if running or pendingEnableMenuItem((HMENU) wParam, ID_CONTROL_PAUSE, (l == ltmmCapture_State_Paused || l == ltmmCapture_State_Pending) ? MF_ENABLED : MF_GRAYED);// determine if capture properties are availableIltmmCapture_HasDialog(g_pCapture, ltmmCapture_Dlg_Capture, &f);EnableMenuItem((HMENU) wParam, ID_CONTROL_CAPTUREPROPERTIES, (!fActive && f) ? MF_ENABLED : MF_GRAYED);// can the control perform normal capture?IltmmCapture_IsModeAvailable(g_pCapture, ltmmCapture_Mode_VideoOrAudio, &f);EnableMenuItem((HMENU) wParam, ID_CONTROL_STARTCAPTURE, f ? MF_ENABLED : MF_GRAYED);// can the control perform auto frame capture?IltmmCapture_IsModeAvailable(g_pCapture, ltmmCapture_Mode_AutoFrames, &f);EnableMenuItem((HMENU) wParam, ID_CONTROL_CAPTUREAUTOFRAMES, f ? MF_ENABLED : MF_GRAYED);// can the control perform manual frame capture?IltmmCapture_IsModeAvailable(g_pCapture, ltmmCapture_Mode_ManualFrames, &f);EnableMenuItem((HMENU) wParam, ID_CONTROL_CAPTUREMANUALFRAMES, f ? MF_ENABLED : MF_GRAYED);// can the control perform still image capture?IltmmCapture_IsModeAvailable(g_pCapture, ltmmCapture_Mode_Still, &f);EnableMenuItem((HMENU) wParam, ID_CONTROL_CAPTUREDIB, f ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_CAPTUREPICTURE, f ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_GETSTILLDIB, f ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_GETSTILLPICTURE, f ? MF_ENABLED : MF_GRAYED);// check which video size mode is being usedIltmmCapture_get_VideoWindowSizeMode(g_pCapture, &sm);CheckMenuItem((HMENU) wParam, ID_CONTROL_FITTOWINDOW, (sm == ltmmFit) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_STRETCHTOWINDOW, (sm == ltmmStretch) ? MF_CHECKED : MF_UNCHECKED);// check the preview statusIltmmCapture_get_Preview(g_pCapture, &f);CheckMenuItem((HMENU) wParam, ID_CONTROL_PREVIEW, f ? MF_CHECKED : MF_UNCHECKED);EnableMenuItem((HMENU) wParam, ID_CONTROL_PREVIEW, !fActive ? MF_ENABLED : MF_GRAYED);// check the audio preview statusIltmmCapture_get_PreviewSource(g_pCapture, &l);CheckMenuItem((HMENU) wParam, ID_CONTROL_PREVIEWVIDEOANDAUDIO, (l == ltmmCapture_Preview_VideoAndAudio) ? MF_CHECKED : MF_UNCHECKED);EnableMenuItem((HMENU) wParam, ID_CONTROL_PREVIEWVIDEOANDAUDIO, !fActive ? MF_ENABLED : MF_GRAYED);// check close captioningIltmmCapture_get_CloseCaptioning(g_pCapture, &f);CheckMenuItem((HMENU) wParam, ID_CONTROL_CLOSECAPTIONING, f ? MF_CHECKED : MF_UNCHECKED);IltmmCapture_get_CloseCaptionAvailable(g_pCapture, &f);EnableMenuItem((HMENU) wParam, ID_CONTROL_CLOSECAPTIONING, (!fActive && f) ? MF_ENABLED : MF_GRAYED);// check the master streamIltmmCapture_get_MasterStream(g_pCapture, &l);CheckMenuItem((HMENU) wParam, ID_CONTROL_MASTERSTREAM_NONE, (l == ltmmCapture_MasterStream_None) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_MASTERSTREAM_AUDIO, (l == ltmmCapture_MasterStream_Audio) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_MASTERSTREAM_VIDEO, (l == ltmmCapture_MasterStream_Video) ? MF_CHECKED : MF_UNCHECKED);EnableMenuItem((HMENU) wParam, ID_CONTROL_MASTERSTREAM_NONE, (!fActive) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_MASTERSTREAM_AUDIO, (!fActive) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_MASTERSTREAM_VIDEO, (!fActive) ? MF_ENABLED : MF_GRAYED);// check the frame rateIltmmCapture_get_UseFrameRate(g_pCapture, &f);IltmmCapture_get_FrameRate(g_pCapture, &d);CheckMenuItem((HMENU) wParam, ID_CONTROL_FRAMERATE_DEFAULT, (!f) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_FRAMERATE_15FPS, (f && fabs(d - 15.0) < 0.1) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_FRAMERATE_30FPS, (f && fabs(d - 30.0) < 0.1) ? MF_CHECKED : MF_UNCHECKED);EnableMenuItem((HMENU) wParam, ID_CONTROL_FRAMERATE_DEFAULT, (!fActive) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_FRAMERATE_15FPS, (!fActive) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_FRAMERATE_30FPS, (!fActive) ? MF_ENABLED : MF_GRAYED);// check the time limitIltmmCapture_get_UseTimeLimit(g_pCapture, &f);IltmmCapture_get_TimeLimit(g_pCapture, &d);CheckMenuItem((HMENU) wParam, ID_CONTROL_TIMELIMIT_NONE, (!f) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_TIMELIMIT_15SEC, (f && fabs(d - 15.0) < 0.1) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_TIMELIMIT_30SEC, (f && fabs(d - 30.0) < 0.1) ? MF_CHECKED : MF_UNCHECKED);EnableMenuItem((HMENU) wParam, ID_CONTROL_TIMELIMIT_NONE, (!fActive) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_TIMELIMIT_15SEC, (!fActive) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_TIMELIMIT_30SEC, (!fActive) ? MF_ENABLED : MF_GRAYED);// check the frame delayIltmmCapture_get_FrameDelay(g_pCapture, &d);CheckMenuItem((HMENU) wParam, ID_CONTROL_FRAMEDELAY_1SEC, (fabs(d - 1.0) < 0.1) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_FRAMEDELAY_5SEC, (fabs(d - 5.0) < 0.1) ? MF_CHECKED : MF_UNCHECKED);EnableMenuItem((HMENU) wParam, ID_CONTROL_FRAMEDELAY_1SEC, (!fActive) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_FRAMEDELAY_5SEC, (!fActive) ? MF_ENABLED : MF_GRAYED);// check the targetIltmmCapture_get_TargetType(g_pCapture, &l);CheckMenuItem((HMENU) wParam, ID_CONTROL_TARGET_FILE, (l == ltmmCapture_Target_File) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_TARGET_ARRAY, (l == ltmmCapture_Target_Array) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_TARGET_DEVICE, (l == ltmmCapture_Target_Device) ? MF_CHECKED : MF_UNCHECKED);EnableMenuItem((HMENU) wParam, ID_CONTROL_TARGET_FILE, (!fActive) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_TARGET_ARRAY, (!fActive) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_TARGET_DEVICE, (!fActive) ? MF_ENABLED : MF_GRAYED);IltmmCapture_get_TargetFormat(g_pCapture, &l);IltmmCapture_get_TargetType(g_pCapture, &l2);CheckMenuItem((HMENU) wParam, ID_CONTROL_TARGETFORMAT_AVI, (l == ltmmCapture_TargetFormat_Avi) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_TARGETFORMAT_WAVE, (l == ltmmCapture_TargetFormat_WAVE) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_TARGETFORMAT_MPEG1AUDIO, (l == ltmmCapture_TargetFormat_MPEG1Audio) ? MF_CHECKED : MF_UNCHECKED);EnableMenuItem((HMENU) wParam, ID_CONTROL_TARGETFORMAT_AVI, (!fActive && l2 != ltmmCapture_Target_Device) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_TARGETFORMAT_WAVE, (!fActive && l2 != ltmmCapture_Target_Device) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_TARGETFORMAT_MPEG1AUDIO, (!fActive && l2 != ltmmCapture_Target_Device) ? MF_ENABLED : MF_GRAYED);// check the processor previewIltmmCapture_get_PreviewTap(g_pCapture, &l);CheckMenuItem((HMENU) wParam, ID_CONTROL_PREVIEWPROCESSORS, (l == ltmmCapture_PreviewTap_Processors) ? MF_CHECKED : MF_UNCHECKED);// check the properties previewIltmmCapture_get_ShowDialogPreview(g_pCapture, &f);CheckMenuItem((HMENU) wParam, ID_CONTROL_PROPERTIESPREVIEW, (f) ? MF_CHECKED : MF_UNCHECKED);// enable the vcr controlsIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_get_DeviceType(pVCR, &l);// if no tape is loaded, then disable vcr controlIltmmVCRControl_get_MediaType(pVCR, &l2);if(l2 == ltmmVCRControl_MediaType_NotPresent)l = ltmmVCRControl_DeviceType_NotPresent;// get the current vcr modeIltmmVCRControl_get_Mode(pVCR, &l2);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_PLAY, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_Play) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_STOP, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_Stop) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_PAUSE, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_Pause) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_REWIND, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_Rewind) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_FASTFORWARD, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_FastForward) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_STEPFORWARD, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_StepForward) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_STEPBACKWARD, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_StepBackward) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_FASTESTFORWARD, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_FastestForward) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_FASTESTREVERSE, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_FastestReverse) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_SLOWESTFORWARD, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_SlowestForward) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_SLOWESTREVERSE, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != ltmmVCRControl_Mode_SlowestReverse) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_RECORD, (l != ltmmVCRControl_DeviceType_NotPresent && l2 != ltmmVCRControl_Mode_Record) ? MF_ENABLED : MF_GRAYED);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_PAUSERECORDING, (l != ltmmVCRControl_DeviceType_NotPresent && l2 != ltmmVCRControl_Mode_PauseRecording) ? MF_ENABLED : MF_GRAYED);IltmmVCRControl_ReadTimecode(pVCR, &l2);EnableMenuItem((HMENU) wParam, ID_CONTROL_VCR_SEEKSTART, (l != ltmmVCRControl_DeviceType_NotPresent && l != ltmmVCRControl_DeviceType_Camera && l2 != 0) ? MF_ENABLED : MF_GRAYED);IUnknown_Release(pVCR);// check the audio buffer sizeIltmmCapture_get_AudioBufferSize(g_pCapture, &d);CheckMenuItem((HMENU) wParam, ID_CONTROL_AUDIOBUFFERING_05SECONDS, (fabs(d - 0.5) < 0.01) ? MF_CHECKED : MF_UNCHECKED);CheckMenuItem((HMENU) wParam, ID_CONTROL_AUDIOBUFFERING_005SECONDS, (fabs(d - 0.05) < 0.01) ? MF_CHECKED : MF_UNCHECKED);}break;case WM_COMMAND:switch(LOWORD(wParam)){case ID_CONTROL_FITTOWINDOW:// fit the video to the windowIltmmCapture_put_VideoWindowSizeMode(g_pCapture, ltmmFit);return 0;break;case ID_CONTROL_STRETCHTOWINDOW:// stretch the video to the windowIltmmCapture_put_VideoWindowSizeMode(g_pCapture, ltmmStretch);return 0;break;case ID_CONTROL_FULLSCREEN:// toggle fullscreen modeIltmmCapture_ToggleFullScreenMode(g_pCapture);return 0;break;case ID_CONTROL_PREVIEW:// toggle previewIltmmCapture_TogglePreview(g_pCapture);return 0;break;case ID_CONTROL_PREVIEWVIDEOANDAUDIO:// toggle audio previewIltmmCapture_get_PreviewSource(g_pCapture, &l);if(l == ltmmCapture_Preview_VideoAndAudio)IltmmCapture_put_PreviewSource(g_pCapture, ltmmCapture_Preview_Video);elseIltmmCapture_put_PreviewSource(g_pCapture, ltmmCapture_Preview_VideoAndAudio);return 0;break;case ID_CONTROL_CLOSECAPTIONING:// toggle close captioningIltmmCapture_ToggleCloseCaptioning(g_pCapture);return 0;break;case ID_CONTROL_STOPCAPTURE:// stop capturingIltmmCapture_StopCapture(g_pCapture);return 0;break;case ID_CONTROL_CAPTUREPROPERTIES:// set the capture propertiesIltmmCapture_ShowDialog(g_pCapture, ltmmCapture_Dlg_Capture, (long) hwnd);return 0;break;case ID_CONTROL_STARTCAPTURE:// ready capture to eliminate start delayshr = IltmmCapture_ReadyCapture(g_pCapture, ltmmCapture_Mode_VideoOrAudio);if(SUCCEEDED(hr)){// start recording, if vcr outputIltmmCapture_get_TargetVCRControl(g_pCapture, &pVCR);hr = IltmmVCRControl_Record(pVCR);IUnknown_Release(pVCR);// uncomment the following line to view the graph in DirectShow GraphEdit// IltmmCapture_EditGraph(g_pCapture);if(MessageBox(hwnd, _T("Ready to capture. Click 'ok' to start."), _T("Capture"), MB_OKCANCEL) == IDOK){// start capturingIltmmCapture_StartCapture(g_pCapture, ltmmCapture_Mode_VideoOrAudio);}else{// cancel captureIltmmCapture_StopCapture(g_pCapture);// stop recording, if vcr outputIltmmCapture_get_TargetVCRControl(g_pCapture, &pVCR);IltmmVCRControl_Stop (pVCR);IUnknown_Release(pVCR);}}return 0;break;case ID_CONTROL_RUN:// run the capture graphIltmmCapture_RunCapture(g_pCapture);return 0;break;case ID_CONTROL_PAUSE:// pause the capture graphIltmmCapture_PauseCapture(g_pCapture);return 0;break;case ID_CONTROL_CAPTUREAUTOFRAMES:hr = IltmmCapture_ReadyCapture(g_pCapture, ltmmCapture_Mode_AutoFrames);if(SUCCEEDED(hr)){// start recording, if vcr outputIltmmCapture_get_TargetVCRControl(g_pCapture, &pVCR);hr = IltmmVCRControl_Record(pVCR);IUnknown_Release(pVCR);if(SUCCEEDED(hr))Sleep(2000);// start capturing the automatic frame sequenceIltmmCapture_StartCapture(g_pCapture, ltmmCapture_Mode_AutoFrames);}return 0;break;case ID_CONTROL_CAPTUREMANUALFRAMES:hr = IltmmCapture_ReadyCapture(g_pCapture, ltmmCapture_Mode_ManualFrames);if(SUCCEEDED(hr)){// start recording, if vcr outputIltmmCapture_get_TargetVCRControl(g_pCapture, &pVCR);hr = IltmmVCRControl_Record(pVCR);IUnknown_Release(pVCR);if(SUCCEEDED(hr))Sleep(2000);// start capturing the automatic frame sequencehr = IltmmCapture_StartCapture(g_pCapture, ltmmCapture_Mode_ManualFrames);if(SUCCEEDED(hr)){while(MessageBox(hwnd, _T("Press 'ok' to capture frame."), _T("Capture Manual Frames"), MB_OKCANCEL) == IDOK)IltmmCapture_CaptureFrame(g_pCapture);IltmmCapture_StopCapture(g_pCapture);}// stop recording, if vcr outputIltmmCapture_get_TargetVCRControl(g_pCapture, &pVCR);IltmmVCRControl_Stop(pVCR);IUnknown_Release(pVCR);}return 0;break;case ID_CONTROL_CAPTUREDIB:// capture device independent bitmaphr = IltmmCapture_CaptureDIB(g_pCapture, (long*) &hDIB);if(SUCCEEDED(hr)){// copy to the clipboardOpenClipboard(hwnd);EmptyClipboard();SetClipboardData(CF_DIB, hDIB);CloseClipboard();}return 0;break;case ID_CONTROL_CAPTUREPICTURE:// capture an ole picture objecthr = IltmmCapture_CapturePicture(g_pCapture, &pPictureDisp);if(SUCCEEDED(hr)){// save the picturebstr = SysAllocString(MAKE_MEDIA_PATH("still.bmp"));OleSavePictureFile((IDispatch*) pPictureDisp, bstr);SysFreeString(bstr);IUnknown_Release(pPictureDisp);}return 0;break;case ID_CONTROL_GETSTILLDIB:// alternate method of capturing a device independent bitmaphr = IltmmCapture_StartCapture(g_pCapture, ltmmCapture_Mode_Still);if(SUCCEEDED(hr)){hr = IltmmCapture_GetStillDIB(g_pCapture, INFINITE, (long*) &hDIB);IltmmCapture_StopCapture(g_pCapture);if(SUCCEEDED(hr)){// copy to the clipboardOpenClipboard(hwnd);EmptyClipboard();SetClipboardData(CF_DIB, hDIB);CloseClipboard();}}return 0;break;case ID_CONTROL_GETSTILLPICTURE:// alternate method for capturing an ole picture objecthr = IltmmCapture_StartCapture(g_pCapture, ltmmCapture_Mode_Still);if(SUCCEEDED(hr)){hr = IltmmCapture_GetStillPicture(g_pCapture, INFINITE, &pPictureDisp);IltmmCapture_StopCapture(g_pCapture);if(SUCCEEDED(hr)){// save the picturebstr = SysAllocString(MAKE_MEDIA_PATH("still.bmp"));OleSavePictureFile((IDispatch*) pPictureDisp, bstr);SysFreeString(bstr);IUnknown_Release(pPictureDisp);}}return 0;break;case ID_CONTROL_COPYTARGET:// copy the target filebstr = SysAllocString(MAKE_MEDIA_PATH("targetcopy.avi"));IltmmCapture_CopyTarget(g_pCapture, bstr, VARIANT_FALSE);SysFreeString(bstr);return 0;break;case ID_CONTROL_MASTERSTREAM_NONE:// no master streamIltmmCapture_put_MasterStream(g_pCapture, ltmmCapture_MasterStream_None);return 0;break;case ID_CONTROL_MASTERSTREAM_AUDIO:// set the audio masterIltmmCapture_put_MasterStream(g_pCapture, ltmmCapture_MasterStream_Audio);return 0;break;case ID_CONTROL_MASTERSTREAM_VIDEO:// set the video masterIltmmCapture_put_MasterStream(g_pCapture, ltmmCapture_MasterStream_Video);return 0;break;case ID_CONTROL_FRAMERATE_DEFAULT:// set the rate to defaultIltmmCapture_put_UseFrameRate(g_pCapture, VARIANT_FALSE);return 0;break;case ID_CONTROL_FRAMERATE_15FPS:// set the rate to 15 fpsIltmmCapture_put_FrameRate(g_pCapture, 15.0);IltmmCapture_put_UseFrameRate(g_pCapture, VARIANT_TRUE);return 0;break;case ID_CONTROL_FRAMERATE_30FPS:// set rate to 30 fpsIltmmCapture_put_FrameRate(g_pCapture, 30.0);IltmmCapture_put_UseFrameRate(g_pCapture, VARIANT_TRUE);return 0;break;case ID_CONTROL_TIMELIMIT_NONE:// no time limitIltmmCapture_put_UseTimeLimit(g_pCapture, VARIANT_FALSE);return 0;break;case ID_CONTROL_TIMELIMIT_15SEC:// 15 sec time limitIltmmCapture_put_TimeLimit(g_pCapture, 15.0);IltmmCapture_put_UseTimeLimit(g_pCapture, VARIANT_TRUE);return 0;break;case ID_CONTROL_TIMELIMIT_30SEC:// 30 sec time limitIltmmCapture_put_TimeLimit(g_pCapture, 30.0);IltmmCapture_put_UseTimeLimit(g_pCapture, VARIANT_TRUE);return 0;break;case ID_CONTROL_FRAMEDELAY_1SEC:// 1 sec frame delayIltmmCapture_put_FrameDelay(g_pCapture, 1.0);return 0;break;case ID_CONTROL_FRAMEDELAY_5SEC:// 5 sec frame delayIltmmCapture_put_FrameDelay(g_pCapture, 5.0);return 0;break;case ID_CONTROL_TARGET_FILE:// assign a target fileFreeTarget();// select the LEAD video compressorIltmmCapture_get_VideoCompressors(g_pCapture, &pCompressors);bstr = SysAllocString(L"@device:sw:{33D9A760-90C8-11D0-BD43-00A0C911CE86}\\LEAD MCMP/MJPEG Codec (2.0)");IltmmCompressors_Find(pCompressors, bstr, &index);SysFreeString(bstr);if(index >= 0)IltmmCompressors_put_Selection(pCompressors, index);IUnknown_Release(pCompressors);// select the MP3 audio video compressorIltmmCapture_get_AudioCompressors(g_pCapture, &pCompressors);bstr = SysAllocString(L"@device:cm:{33D9A761-90C8-11D0-BD43-00A0C911CE86}\\85MPEG Layer-3");IltmmCompressors_Find(pCompressors, bstr, &index);SysFreeString(bstr);if(index >= 0)IltmmCompressors_put_Selection(pCompressors, index);IUnknown_Release(pCompressors);IltmmCapture_put_TargetFormat(g_pCapture, ltmmCapture_TargetFormat_Avi);bstr = SysAllocString(MAKE_MEDIA_PATH("target.avi"));IltmmCapture_put_TargetFile(g_pCapture, bstr);SysFreeString(bstr);return 0;break;case ID_CONTROL_TARGET_ARRAY:// assign a target arrayFreeTarget();// select the LEAD video compressorIltmmCapture_get_VideoCompressors(g_pCapture, &pCompressors);bstr = SysAllocString(L"@device:sw:{33D9A760-90C8-11D0-BD43-00A0C911CE86}\\LEAD MCMP/MJPEG Codec (2.0)"); IltmmCompressors_Find(pCompressors, bstr, &index);SysFreeString(bstr);if(index >= 0)IltmmCompressors_put_Selection(pCompressors, index);IUnknown_Release(pCompressors);// select the MP3 audio video compressorIltmmCapture_get_AudioCompressors(g_pCapture, &pCompressors);bstr = SysAllocString(L"@device:cm:{33D9A761-90C8-11D0-BD43-00A0C911CE86}\\85MPEG Layer-3");IltmmCompressors_Find(pCompressors, bstr, &index);SysFreeString(bstr);if(index >= 0)IltmmCompressors_put_Selection(pCompressors, index);IUnknown_Release(pCompressors);IltmmCapture_put_TargetFormat(g_pCapture, ltmmCapture_TargetFormat_Avi);VariantInit(&var);V_VT(&var) = (VT_ARRAY | VT_UI1);V_ARRAY(&var) = SafeArrayCreateVector(VT_UI1, 0, 0);IltmmCapture_put_TargetArray(g_pCapture, var);return 0;break;case ID_CONTROL_TARGET_DEVICE:// assign a target deviceFreeTarget();// deselect the video compressorIltmmCapture_get_VideoCompressors(g_pCapture, &pCompressors);IltmmCompressors_put_Selection(pCompressors, -1);IUnknown_Release(pCompressors);// deselect the audio compressorIltmmCapture_get_AudioCompressors(g_pCapture, &pCompressors);IltmmCompressors_put_Selection(pCompressors, -1);IUnknown_Release(pCompressors);IltmmCapture_put_TargetFormat(g_pCapture, ltmmCapture_TargetFormat_dvsd);// select the first output deviceIltmmCapture_get_TargetDevices(g_pCapture, &pTargetDevices);IltmmTargetDevices_put_Selection(pTargetDevices, 0);IUnknown_Release(pTargetDevices);return 0;break;case ID_CONTROL_TARGETFORMAT_AVI:// is the target a file?IltmmCapture_get_TargetType(g_pCapture, &l);if(l == ltmmCapture_Target_File){// rename itbstr = SysAllocString(MAKE_MEDIA_PATH("target.avi"));IltmmCapture_put_TargetFile(g_pCapture, bstr);SysFreeString(bstr);}IltmmCapture_put_TargetFormat(g_pCapture, ltmmCapture_TargetFormat_Avi);return 0;break;case ID_CONTROL_TARGETFORMAT_WAVE:// is the target a file?IltmmCapture_get_TargetType(g_pCapture, &l);if(l == ltmmCapture_Target_File){// rename itbstr = SysAllocString(MAKE_MEDIA_PATH("target.wav"));IltmmCapture_put_TargetFile(g_pCapture, bstr);SysFreeString(bstr);}IltmmCapture_put_TargetFormat(g_pCapture, ltmmCapture_TargetFormat_WAVE);return 0;break;case ID_CONTROL_TARGETFORMAT_MPEG1AUDIO:// is the target a file?IltmmCapture_get_TargetType(g_pCapture, &l);if(l == ltmmCapture_Target_File){// rename itbstr = SysAllocString(MAKE_MEDIA_PATH("target.mp3"));IltmmCapture_put_TargetFile(g_pCapture, bstr);SysFreeString(bstr);}// we have already selected the MP3 compressorIltmmCapture_put_TargetFormat(g_pCapture, ltmmCapture_TargetFormat_MPEG1Audio);return 0;break;case ID_CONTROL_AUDIOPROCESSORS:// edit the audio processorsIltmmCapture_ShowDialog(g_pCapture, ltmmCapture_Dlg_AudioProcessors, (long) hwnd);return 0;break;case ID_CONTROL_VIDEOPROCESSORS:// edit the video processorsIltmmCapture_ShowDialog(g_pCapture, ltmmCapture_Dlg_VideoProcessors, (long) hwnd);return 0;break;case ID_CONTROL_PREVIEWPROCESSORS:// toggle the processor previewIltmmCapture_get_PreviewTap(g_pCapture, &l);IltmmCapture_put_PreviewTap(g_pCapture, (l == ltmmCapture_PreviewTap_Processors) ? ltmmCapture_PreviewTap_Source : ltmmCapture_PreviewTap_Processors);return 0;break;case ID_CONTROL_PROPERTIESPREVIEW:// toggle the preview while editing propertiesIltmmCapture_get_ShowDialogPreview(g_pCapture, &f);IltmmCapture_put_ShowDialogPreview(g_pCapture, f ? VARIANT_FALSE : VARIANT_TRUE);return 0;break;case ID_CONTROL_VCR_PLAY:// vcr playIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_Play(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_STOP:// vcr stopIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_Stop (pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_PAUSE:// vcr pauseIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_Pause(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_FASTFORWARD:// vcr fast forwardIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_FastForward(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_REWIND:// vcr rewindIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_Rewind(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_RECORD:// vcr recordIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_Record(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_PAUSERECORDING:// vcr pause recordingIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_PauseRecording(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_STEPFORWARD:// vcr step forwardIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_StepForward(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_STEPBACKWARD:// vcr step backwardIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_StepBackward(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_FASTESTFORWARD:// vcr fastest forwardIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_FastestForward(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_FASTESTREVERSE:// vcr fastest reverseIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_FastestReverse(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_SLOWESTFORWARD:// vcr slowest forwardIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_SlowestForward(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_SLOWESTREVERSE:// vcr slowest reverseIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_SlowestReverse(pVCR);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_VCR_SEEKSTART:// vcr seek startIltmmCapture_get_CaptureVCRControl(g_pCapture, &pVCR);IltmmVCRControl_SeekTimecode(pVCR, 0);IUnknown_Release(pVCR);return 0;break;case ID_CONTROL_AUDIOBUFFERING_05SECONDS:// set 0.5 second audio bufferIltmmCapture_put_AudioBufferSize(g_pCapture, 0.5);return 0;break;case ID_CONTROL_AUDIOBUFFERING_005SECONDS:// set 0.05 second audio bufferIltmmCapture_put_AudioBufferSize(g_pCapture, 0.05);return 0;break;}break;case WM_LBUTTONDOWN:IltmmCapture_get_State(g_pCapture, &l);if(l != ltmmCapture_State_Pending || l != ltmmCapture_State_Running){IltmmCapture_get_VideoWindowLeft(g_pCapture, &x);IltmmCapture_get_VideoWindowTop(g_pCapture, &y);IltmmCapture_get_VideoWindowWidth(g_pCapture, &cx);IltmmCapture_get_VideoWindowHeight(g_pCapture, &cy);SetRect(&rc, x, y, x + cx, y + cy);pt.x = (short) LOWORD(lParam);pt.y = (short) HIWORD(lParam);if(PtInRect(&rc, pt)){// set the capture propertiesIltmmCapture_ShowDialog(g_pCapture, ltmmCapture_Dlg_Capture, (long) hwnd);}}return 0;break;}return DefWindowProc(hwnd, message, wParam, lParam);}int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow){MSG msg;HRESULT hr;WNDCLASSEX wcex;UNUSED_PARAMETER (hPrevInstance);UNUSED_PARAMETER (lpCmdLine);g_hInstance = hInstance;// initialize the COM libraryhr = CoInitialize(NULL);if(FAILED(hr))goto error;// register the video frame window classwcex.cbSize = sizeof(WNDCLASSEX);wcex.style = CS_HREDRAW | CS_VREDRAW;wcex.lpfnWndProc = CaptureWndProc;wcex.cbClsExtra = 0;wcex.cbWndExtra = 0;wcex.hInstance = g_hInstance;wcex.hIcon = NULL;wcex.hCursor = LoadCursor(NULL, IDC_ARROW);wcex.hbrBackground = (HBRUSH) (COLOR_APPWORKSPACE + 1);wcex.lpszMenuName = (LPCSTR)IDR_MENU;wcex.lpszClassName = SZ_WNDCLASS_CAPTURE;wcex.hIconSm = NULL;if(!RegisterClassEx(&wcex))goto error;// create the capture objecthr = CoCreateInstance(&CLSID_ltmmCapture, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmCapture, (void**) &g_pCapture);if(FAILED(hr))goto error;// create the video frame windowif(!CreateWindow(SZ_WNDCLASS_CAPTURE, _T("Capture"), WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN,CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, g_hInstance, NULL))goto error;ShowWindow(g_hwndCapture, nCmdShow);UpdateWindow(g_hwndCapture);// process until donewhile (GetMessage(&msg, NULL, 0, 0)){TranslateMessage(&msg);DispatchMessage(&msg);}error:if(g_pCapture)IUnknown_Release(g_pCapture);CoUninitialize();return 0;}