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Windows-classic-samples/Samples/Win7Samples/multimedia/directshow/capture/amcap/amcap.cpp
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//------------------------------------------------------------------------------
// File: AMCap.cpp
//
// Desc: Audio/Video Capture sample for DirectShow
//
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
#include "stdafx.h"
#include <dbt.h>
#include <mmreg.h>
#include <msacm.h>
#include <fcntl.h>
#include <io.h>
#include <stdio.h>
#include <commdlg.h>
#include <strsafe.h>
#include "stdafx.h"
#include "amcap.h"
#include "status.h"
#include "crossbar.h"
#include "SampleCGB.h"
//------------------------------------------------------------------------------
// Macros
//------------------------------------------------------------------------------
#define ABS(x) (((x) > 0) ? (x) : -(x))
// An application can advertise the existence of its filter graph
// by registering the graph with a global Running Object Table (ROT).
// The GraphEdit application can detect and remotely view the running
// filter graph, allowing you to 'spy' on the graph with GraphEdit.
//
// To enable registration in this sample, define REGISTER_FILTERGRAPH.
//
#ifdef DEBUG
#define REGISTER_FILTERGRAPH
#endif
//------------------------------------------------------------------------------
// Global data
//------------------------------------------------------------------------------
HINSTANCE ghInstApp=0;
HACCEL ghAccel=0;
HFONT ghfontApp=0;
TEXTMETRIC gtm={0};
TCHAR gszAppName[]=TEXT("AMCAP");
HWND ghwndApp=0, ghwndStatus=0;
HDEVNOTIFY ghDevNotify=0;
PUnregisterDeviceNotification gpUnregisterDeviceNotification=0;
PRegisterDeviceNotification gpRegisterDeviceNotification=0;
DWORD g_dwGraphRegister=0;
struct _capstuff
{
WCHAR wszCaptureFile[_MAX_PATH];
WORD wCapFileSize; // size in Meg
ISampleCaptureGraphBuilder *pBuilder;
IVideoWindow *pVW;
IMediaEventEx *pME;
IAMDroppedFrames *pDF;
IAMVideoCompression *pVC;
IAMVfwCaptureDialogs *pDlg;
IAMStreamConfig *pASC; // for audio cap
IAMStreamConfig *pVSC; // for video cap
IBaseFilter *pRender;
IBaseFilter *pVCap, *pACap;
IGraphBuilder *pFg;
IFileSinkFilter *pSink;
IConfigAviMux *pConfigAviMux;
int iMasterStream;
BOOL fCaptureGraphBuilt;
BOOL fPreviewGraphBuilt;
BOOL fCapturing;
BOOL fPreviewing;
BOOL fMPEG2;
BOOL fCapAudio;
BOOL fCapCC;
BOOL fCCAvail;
BOOL fCapAudioIsRelevant;
bool fDeviceMenuPopulated;
IMoniker *rgpmVideoMenu[10];
IMoniker *rgpmAudioMenu[10];
IMoniker *pmVideo;
IMoniker *pmAudio;
double FrameRate;
BOOL fWantPreview;
long lCapStartTime;
long lCapStopTime;
WCHAR wachFriendlyName[120];
BOOL fUseTimeLimit;
BOOL fUseFrameRate;
DWORD dwTimeLimit;
int iFormatDialogPos;
int iSourceDialogPos;
int iDisplayDialogPos;
int iVCapDialogPos;
int iVCrossbarDialogPos;
int iTVTunerDialogPos;
int iACapDialogPos;
int iACrossbarDialogPos;
int iTVAudioDialogPos;
int iVCapCapturePinDialogPos;
int iVCapPreviewPinDialogPos;
int iACapCapturePinDialogPos;
long lDroppedBase;
long lNotBase;
BOOL fPreviewFaked;
CCrossbar *pCrossbar;
int iVideoInputMenuPos;
LONG NumberOfVideoInputs;
HMENU hMenuPopup;
int iNumVCapDevices;
} gcap;
// implements IAMCopyCaptureFileProgress
//
class CProgress : public IAMCopyCaptureFileProgress
{
public:
CProgress()
{
};
~CProgress()
{
};
STDMETHODIMP_(ULONG) AddRef()
{
return 1;
};
STDMETHODIMP_(ULONG) Release()
{
return 0;
};
STDMETHODIMP QueryInterface(REFIID iid, void **p)
{
if (p == NULL)
{
return E_POINTER;
}
if (iid == IID_IUnknown)
{
*p = reinterpret_cast<IUnknown*>(this);
AddRef();
return S_OK;
}
else if (iid == IID_IAMCopyCaptureFileProgress)
{
*p = reinterpret_cast<IAMCopyCaptureFileProgress*>(this);
AddRef();
return S_OK;
}
else
{
return E_NOINTERFACE;
}
};
STDMETHODIMP Progress(int i)
{
TCHAR tach[80];
HRESULT hr = StringCchPrintf(tach, 80, TEXT("Save File Progress: %d%%\0"), i);
statusUpdateStatus(ghwndStatus, tach);
return S_OK;
};
};
//------------------------------------------------------------------------------
// Function Prototypes
//------------------------------------------------------------------------------
typedef LONG(PASCAL *LPWNDPROC)(HWND, UINT, WPARAM, LPARAM); // pointer to a window procedure
LONG WINAPI AppWndProc(HWND hwnd, UINT uiMessage, WPARAM wParam, LPARAM lParam);
LONG PASCAL AppCommand(HWND hwnd, unsigned msg, WPARAM wParam, LPARAM lParam);
BOOL CALLBACK AboutDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
void ErrMsg(LPTSTR sz,...);
BOOL SetCaptureFile(HWND hWnd);
BOOL SaveCaptureFile(HWND hWnd);
BOOL AllocCaptureFile(HWND hWnd);
int DoDialog(HWND hwndParent, int DialogID, DLGPROC fnDialog, long lParam);
int FAR PASCAL AllocCapFileProc(HWND hDlg, UINT Message, UINT wParam, LONG lParam);
int FAR PASCAL FrameRateProc(HWND hDlg, UINT Message, UINT wParam, LONG lParam);
int FAR PASCAL TimeLimitProc(HWND hDlg, UINT Message, UINT wParam, LONG lParam);
int FAR PASCAL PressAKeyProc(HWND hDlg, UINT Message, UINT wParam, LONG lParam);
void TearDownGraph(void);
BOOL BuildCaptureGraph();
BOOL BuildPreviewGraph();
void UpdateStatus(BOOL fAllStats);
void AddDevicesToMenu();
void ChooseDevices(TCHAR *szVideo, TCHAR *szAudio);
void ChooseDevices(IMoniker *pmVideo, IMoniker *pmAudio);
void ChooseFrameRate();
BOOL InitCapFilters();
void FreeCapFilters();
BOOL StopPreview();
BOOL StartPreview();
BOOL StopCapture();
DWORDLONG GetSize(LPCTSTR tach);
void MakeMenuOptions();
void OnClose();
//------------------------------------------------------------------------------
// Name: SetAppCaption()
// Desc: Set the caption to be the application name followed by the capture file
//------------------------------------------------------------------------------
void SetAppCaption()
{
TCHAR tach[_MAX_PATH + 80];
StringCchCopy(tach, NUMELMS(tach), gszAppName);
if(gcap.wszCaptureFile[0] != 0)
{
HRESULT hr = StringCchCat(tach, _MAX_PATH + 80, TEXT(" - "));
hr = StringCchCat(tach, _MAX_PATH + 80, gcap.wszCaptureFile);
}
SetWindowText(ghwndApp, tach);
}
/*----------------------------------------------------------------------------*\
| AppInit( hInst, hPrev) |
| |
| Description: |
| This is called when the application is first loaded into |
| memory. It performs all initialization that doesn't need to be done |
| once per instance. |
| |
| Arguments: |
| hInstance instance handle of current instance |
| hPrev instance handle of previous instance |
| |
| Returns: |
| TRUE if successful, FALSE if not |
| |
\*----------------------------------------------------------------------------*/
BOOL AppInit(HINSTANCE hInst, HINSTANCE hPrev, int sw)
{
WNDCLASS cls;
HDC hdc;
const DWORD dwExStyle = 0;
CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
/* Save instance handle for DialogBoxs */
ghInstApp = hInst;
ghAccel = LoadAccelerators(hInst, MAKEINTATOM(ID_APP));
if(!hPrev)
{
/*
* Register a class for the main application window
*/
cls.hCursor = LoadCursor(NULL,IDC_ARROW);
cls.hIcon = NULL;
cls.lpszMenuName = MAKEINTATOM(ID_APP);
cls.lpszClassName = MAKEINTATOM(ID_APP);
cls.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
cls.hInstance = hInst;
cls.style = CS_BYTEALIGNCLIENT | CS_VREDRAW | CS_HREDRAW | CS_DBLCLKS;
cls.lpfnWndProc = (WNDPROC) AppWndProc;
cls.cbWndExtra = 0;
cls.cbClsExtra = 0;
if(!RegisterClass(&cls))
return FALSE;
}
// Is this necessary?
ghfontApp = (HFONT)GetStockObject(ANSI_VAR_FONT);
hdc = GetDC(NULL);
SelectObject(hdc, ghfontApp);
GetTextMetrics(hdc, &gtm);
ReleaseDC(NULL, hdc);
ghwndApp=CreateWindowEx(dwExStyle,
MAKEINTATOM(ID_APP), // Class name
gszAppName, // Caption
// Style bits
WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN,
CW_USEDEFAULT, 0, // Position
320,300, // Size
(HWND)NULL, // Parent window (no parent)
(HMENU)NULL, // use class menu
hInst, // handle to window instance
(LPSTR)NULL // no params to pass on
);
// create the status bar
statusInit(hInst, hPrev);
ghwndStatus = CreateWindowEx(0,
szStatusClass,
NULL,
WS_CHILD|WS_BORDER|WS_VISIBLE|WS_CLIPSIBLINGS,
0, 0,
0, 0,
ghwndApp,
NULL,
hInst,
NULL);
if(ghwndStatus == NULL)
return(FALSE);
ShowWindow(ghwndApp,sw);
// Read the capture file name from win.ini
GetProfileString(TEXT("annie"), TEXT("CaptureFile"), TEXT(""),
gcap.wszCaptureFile,
NUMELMS(gcap.wszCaptureFile));
// Read the list of devices to use from win.ini
ZeroMemory(gcap.rgpmAudioMenu, sizeof(gcap.rgpmAudioMenu));
ZeroMemory(gcap.rgpmVideoMenu, sizeof(gcap.rgpmVideoMenu));
gcap.pmVideo = 0;
gcap.pmAudio = 0;
gcap.fMPEG2 = FALSE;
TCHAR szVideoDisplayName[1024], szAudioDisplayName[1024];
*szAudioDisplayName = *szVideoDisplayName = 0; // null terminate
GetProfileString(TEXT("annie"), TEXT("VideoDevice2"), TEXT(""),
szVideoDisplayName, NUMELMS(szVideoDisplayName));
GetProfileString(TEXT("annie"), TEXT("AudioDevice2"), TEXT(""),
szAudioDisplayName, NUMELMS(szAudioDisplayName));
gcap.fDeviceMenuPopulated = false;
AddDevicesToMenu();
// do we want audio?
gcap.fCapAudio = GetProfileInt(TEXT("annie"), TEXT("CaptureAudio"), TRUE);
gcap.fCapCC = GetProfileInt(TEXT("annie"), TEXT("CaptureCC"), FALSE);
// do we want preview?
gcap.fWantPreview = GetProfileInt(TEXT("annie"), TEXT("WantPreview"), FALSE);
// which stream should be the master? NONE(-1) means nothing special happens
// AUDIO(1) means the video frame rate is changed before written out to keep
// the movie in sync when the audio and video capture crystals are not the
// same (and therefore drift out of sync after a few minutes). VIDEO(0)
// means the audio sample rate is changed before written out
gcap.iMasterStream = GetProfileInt(TEXT("annie"), TEXT("MasterStream"), 1);
// get the frame rate from win.ini before making the graph
gcap.fUseFrameRate = GetProfileInt(TEXT("annie"), TEXT("UseFrameRate"), 1);
int units_per_frame = GetProfileInt(TEXT("annie"), TEXT("FrameRate"), 666667); // 15fps
gcap.FrameRate = 10000000. / units_per_frame;
gcap.FrameRate = (int)(gcap.FrameRate * 100) / 100.;
// reasonable default
if(gcap.FrameRate <= 0.)
gcap.FrameRate = 15.0;
gcap.fUseTimeLimit = GetProfileInt(TEXT("annie"), TEXT("UseTimeLimit"), 0);
gcap.dwTimeLimit = GetProfileInt(TEXT("annie"), TEXT("TimeLimit"), 0);
// Instantiate the capture filters we need to do the menu items.
// This will start previewing, if desired
//
// Make these the official devices we're using
ChooseDevices(szVideoDisplayName, szAudioDisplayName);
// Register for device add/remove notifications
DEV_BROADCAST_DEVICEINTERFACE filterData;
ZeroMemory(&filterData, sizeof(DEV_BROADCAST_DEVICEINTERFACE));
filterData.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
filterData.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
filterData.dbcc_classguid = AM_KSCATEGORY_CAPTURE;
gpUnregisterDeviceNotification = NULL;
gpRegisterDeviceNotification = NULL;
// dynload device removal APIs
{
HMODULE hmodUser = GetModuleHandle(TEXT("user32.dll"));
ASSERT(hmodUser); // we link to user32
gpUnregisterDeviceNotification = (PUnregisterDeviceNotification)
GetProcAddress(hmodUser, "UnregisterDeviceNotification");
// m_pRegisterDeviceNotification is prototyped differently in unicode
gpRegisterDeviceNotification = (PRegisterDeviceNotification)
GetProcAddress(hmodUser,
"RegisterDeviceNotificationW"
);
// failures expected on older platforms.
ASSERT(gpRegisterDeviceNotification && gpUnregisterDeviceNotification ||
!gpRegisterDeviceNotification && !gpUnregisterDeviceNotification);
}
ghDevNotify = NULL;
if(gpRegisterDeviceNotification)
{
ghDevNotify = gpRegisterDeviceNotification(ghwndApp, &filterData, DEVICE_NOTIFY_WINDOW_HANDLE);
ASSERT(ghDevNotify != NULL);
}
SetAppCaption();
return TRUE;
}
void IMonRelease(IMoniker *&pm)
{
if(pm)
{
pm->Release();
pm = 0;
}
}
/*----------------------------------------------------------------------------*\
| WinMain( hInst, hPrev, lpszCmdLine, cmdShow ) |
| |
| Description: |
| The main procedure for the App. After initializing, it just goes |
| into a message-processing loop until it gets a WM_QUIT message |
| (meaning the app was closed). |
| |
| Arguments: |
| hInst instance handle of this instance of the app |
| hPrev instance handle of previous instance, NULL if first |
| szCmdLine ->null-terminated command line |
| cmdShow specifies how the window is initially displayed |
| |
| Returns: |
| The exit code as specified in the WM_QUIT message. |
| |
\*----------------------------------------------------------------------------*/
int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
{
MSG msg;
/* Call initialization procedure */
if(!AppInit(hInst,hPrev,sw))
return FALSE;
/*
* Polling messages from event queue
*/
for(;;)
{
while(PeekMessage(&msg, NULL, 0, 0,PM_REMOVE))
{
if(msg.message == WM_QUIT)
break; // Leave the PeekMessage while() loop
if(TranslateAccelerator(ghwndApp, ghAccel, &msg))
continue;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
if(msg.message == WM_QUIT)
break; // Leave the for() loop
WaitMessage();
}
// Reached on WM_QUIT message
CoUninitialize();
return ((int) msg.wParam);
}
/*----------------------------------------------------------------------------*\
| AppWndProc( hwnd, uiMessage, wParam, lParam ) |
| |
| Description: |
| The window proc for the app's main (tiled) window. This processes all |
| of the parent window's messages. |
| |
| Arguments: |
| hwnd window handle for the window |
| msg message number |
| wParam message-dependent |
| lParam message-dependent |
| |
| Returns: |
| 0 if processed, nonzero if ignored |
| |
\*----------------------------------------------------------------------------*/
LONG WINAPI AppWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc;
RECT rc;
int cxBorder, cyBorder, cy;
switch(msg)
{
case WM_CREATE:
break;
case WM_COMMAND:
return AppCommand(hwnd,msg,wParam,lParam);
case WM_INITMENU:
// we can start capture if not capturing already
EnableMenuItem((HMENU)wParam, MENU_START_CAP,
(!gcap.fCapturing) ? MF_ENABLED : MF_GRAYED);
// we can stop capture if it's currently capturing
EnableMenuItem((HMENU)wParam, MENU_STOP_CAP,
(gcap.fCapturing) ? MF_ENABLED : MF_GRAYED);
// We can bring up a dialog if the graph is stopped
EnableMenuItem((HMENU)wParam, MENU_DIALOG0, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOG1, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOG2, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOG3, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOG4, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOG5, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOG6, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOG7, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOG8, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOG9, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOGA, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOGB, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOGC, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOGD, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOGE, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_DIALOGF, !gcap.fCapturing ?
MF_ENABLED : MF_GRAYED);
// toggles capturing audio or not - can't be capturing right now
// and we must have an audio capture device created
EnableMenuItem((HMENU)wParam, MENU_CAP_AUDIO,
(!gcap.fCapturing && gcap.pACap) ? MF_ENABLED : MF_GRAYED);
// are we capturing audio?
CheckMenuItem((HMENU)wParam, MENU_CAP_AUDIO,
(gcap.fCapAudio) ? MF_CHECKED : MF_UNCHECKED);
// are we doing closed captioning?
CheckMenuItem((HMENU)wParam, MENU_CAP_CC,
(gcap.fCapCC) ? MF_CHECKED : MF_UNCHECKED);
EnableMenuItem((HMENU)wParam, MENU_CAP_CC,
(gcap.fCCAvail) ? MF_ENABLED : MF_GRAYED);
// change audio formats when not capturing
EnableMenuItem((HMENU)wParam, MENU_AUDIOFORMAT, (gcap.fCapAudio &&
!gcap.fCapturing) ? MF_ENABLED : MF_GRAYED);
// change frame rate when not capturing, and only if the video
// filter captures a VIDEOINFO type format
EnableMenuItem((HMENU)wParam, MENU_FRAMERATE,
(!gcap.fCapturing && gcap.fCapAudioIsRelevant) ?
MF_ENABLED : MF_GRAYED);
// change time limit when not capturing
EnableMenuItem((HMENU)wParam, MENU_TIMELIMIT,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
// change capture file name when not capturing
EnableMenuItem((HMENU)wParam, MENU_SET_CAP_FILE,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
// pre-allocate capture file when not capturing
EnableMenuItem((HMENU)wParam, MENU_ALLOC_CAP_FILE,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
// can save capture file when not capturing
EnableMenuItem((HMENU)wParam, MENU_SAVE_CAP_FILE,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
// do we want preview?
CheckMenuItem((HMENU)wParam, MENU_PREVIEW,
(gcap.fWantPreview) ? MF_CHECKED : MF_UNCHECKED);
// can toggle preview if not capturing
EnableMenuItem((HMENU)wParam, MENU_PREVIEW,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
// MPEG2 enabled ?
CheckMenuItem((HMENU)wParam, MENU_MPEG2,
(gcap.fMPEG2) ? MF_CHECKED : MF_UNCHECKED);
// can toggle MPEG2 if not capturing
EnableMenuItem((HMENU)wParam, MENU_MPEG2,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
// which is the master stream? Not applicable unless we're also
// capturing audio
EnableMenuItem((HMENU)wParam, MENU_NOMASTER,
(!gcap.fCapturing && gcap.fCapAudio) ? MF_ENABLED : MF_GRAYED);
CheckMenuItem((HMENU)wParam, MENU_NOMASTER,
(gcap.iMasterStream == -1) ? MF_CHECKED : MF_UNCHECKED);
EnableMenuItem((HMENU)wParam, MENU_AUDIOMASTER,
(!gcap.fCapturing && gcap.fCapAudio) ? MF_ENABLED : MF_GRAYED);
CheckMenuItem((HMENU)wParam, MENU_AUDIOMASTER,
(gcap.iMasterStream == 1) ? MF_CHECKED : MF_UNCHECKED);
EnableMenuItem((HMENU)wParam, MENU_VIDEOMASTER,
(!gcap.fCapturing && gcap.fCapAudio) ? MF_ENABLED : MF_GRAYED);
CheckMenuItem((HMENU)wParam, MENU_VIDEOMASTER,
(gcap.iMasterStream == 0) ? MF_CHECKED : MF_UNCHECKED);
// can't select a new capture device when capturing
EnableMenuItem((HMENU)wParam, MENU_VDEVICE0,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_VDEVICE1,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_VDEVICE2,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_VDEVICE3,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_VDEVICE4,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_VDEVICE5,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_VDEVICE6,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_VDEVICE7,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_VDEVICE8,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_VDEVICE9,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE0,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE1,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE2,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE3,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE4,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE5,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE6,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE7,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE8,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
EnableMenuItem((HMENU)wParam, MENU_ADEVICE9,
!gcap.fCapturing ? MF_ENABLED : MF_GRAYED);
break;
case WM_INITMENUPOPUP:
if(GetSubMenu(GetMenu(ghwndApp), 1) == (HMENU)wParam)
{
AddDevicesToMenu();
}
break;
//
// We're out of here!
//
case WM_DESTROY:
IMonRelease(gcap.pmVideo);
IMonRelease(gcap.pmAudio);
{
for(int i = 0; i < NUMELMS(gcap.rgpmVideoMenu); i++)
{
IMonRelease(gcap.rgpmVideoMenu[i]);
}
for(int i = 0; i < NUMELMS(gcap.rgpmAudioMenu); i++)
{
IMonRelease(gcap.rgpmAudioMenu[i]);
}
}
PostQuitMessage(0);
break;
case WM_CLOSE:
OnClose();
break;
case WM_ENDSESSION:
if(wParam || (lParam & ENDSESSION_LOGOFF))
{
OnClose();
}
break;
case WM_ERASEBKGND:
break;
// ESC will stop capture
case WM_KEYDOWN:
if((GetAsyncKeyState(VK_ESCAPE) & 0x01) && gcap.fCapturing)
{
StopCapture();
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
}
break;
case WM_PAINT:
hdc = BeginPaint(hwnd,&ps);
// nothing to do
EndPaint(hwnd,&ps);
break;
case WM_TIMER:
// update our status bar with #captured, #dropped
// if we've stopped capturing, don't do it anymore. Some WM_TIMER
// messages may come late, after we've destroyed the graph and
// we'll get invalid numbers.
if(gcap.fCapturing)
UpdateStatus(FALSE);
// is our time limit up?
if(gcap.fUseTimeLimit)
{
if((timeGetTime() - gcap.lCapStartTime) / 1000 >=
gcap.dwTimeLimit)
{
StopCapture();
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
}
}
break;
case WM_SIZE:
// make the preview window fit inside our window, taking up
// all of our client area except for the status window at the
// bottom
GetClientRect(ghwndApp, &rc);
cxBorder = GetSystemMetrics(SM_CXBORDER);
cyBorder = GetSystemMetrics(SM_CYBORDER);
cy = statusGetHeight() + cyBorder;
MoveWindow(ghwndStatus, -cxBorder, rc.bottom - cy,
rc.right + (2 * cxBorder), cy + cyBorder, TRUE);
rc.bottom -= cy;
// this is the video renderer window showing the preview
if(gcap.pVW)
gcap.pVW->SetWindowPosition(0, 0, rc.right, rc.bottom);
break;
case WM_FGNOTIFY:
// uh-oh, something went wrong while capturing - the filtergraph
// will send us events like EC_COMPLETE, EC_USERABORT and the one
// we care about, EC_ERRORABORT.
if(gcap.pME)
{
LONG event;
LONG_PTR l1, l2;
HRESULT hrAbort = S_OK;
BOOL bAbort = FALSE;
while(gcap.pME->GetEvent(&event, &l1, &l2, 0) == S_OK)
{
gcap.pME->FreeEventParams(event, l1, l2);
if(event == EC_ERRORABORT)
{
StopCapture();
bAbort = TRUE;
hrAbort = static_cast<HRESULT>(l1);
continue;
}
else if(event == EC_DEVICE_LOST)
{
// Check if we have lost a capture filter being used.
// lParam2 of EC_DEVICE_LOST event == 1 indicates device added
// == 0 indicates device removed
if(l2 == 0)
{
IBaseFilter *pf;
IUnknown *punk = (IUnknown *) l1;
if(S_OK == punk->QueryInterface(IID_IBaseFilter, (void **) &pf))
{
if(AreComObjectsEqual(gcap.pVCap, pf))
{
pf->Release();
bAbort = FALSE;
StopCapture();
TCHAR szError[100];
HRESULT hr = StringCchCopy(szError, 100,
TEXT("Stopping Capture (Device Lost). Select New Capture Device\0"));
ErrMsg(szError);
break;
}
pf->Release();
}
}
}
} // end while
if(bAbort)
{
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
TCHAR szError[100];
HRESULT hr = StringCchPrintf(szError, 100, TEXT("ERROR during capture, error code=%08x\0"), hrAbort);
ErrMsg(szError);
}
}
break;
case WM_DEVICECHANGE:
// We are interested in only device arrival & removal events
if(DBT_DEVICEARRIVAL != wParam && DBT_DEVICEREMOVECOMPLETE != wParam)
break;
PDEV_BROADCAST_HDR pdbh = (PDEV_BROADCAST_HDR) lParam;
if(pdbh->dbch_devicetype != DBT_DEVTYP_DEVICEINTERFACE)
{
break;
}
PDEV_BROADCAST_DEVICEINTERFACE pdbi = (PDEV_BROADCAST_DEVICEINTERFACE) lParam;
// Check for capture devices.
if(pdbi->dbcc_classguid != AM_KSCATEGORY_CAPTURE)
{
break;
}
// Check for device arrival/removal.
if(DBT_DEVICEARRIVAL == wParam || DBT_DEVICEREMOVECOMPLETE == wParam)
{
gcap.fDeviceMenuPopulated = false;
}
break;
}
return (LONG) DefWindowProc(hwnd,msg,wParam,lParam);
}
// Make a graph builder object we can use for capture graph building
//
BOOL MakeBuilder()
{
// we have one already
if(gcap.pBuilder)
return TRUE;
gcap.pBuilder = new ISampleCaptureGraphBuilder( );
if( NULL == gcap.pBuilder )
{
return FALSE;
}
return TRUE;
}
// Make a graph object we can use for capture graph building
//
BOOL MakeGraph()
{
// we have one already
if(gcap.pFg)
return TRUE;
HRESULT hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC,
IID_IGraphBuilder, (LPVOID *)&gcap.pFg);
return (hr == NOERROR) ? TRUE : FALSE;
}
// make sure the preview window inside our window is as big as the
// dimensions of captured video, or some capture cards won't show a preview.
// (Also, it helps people tell what size video they're capturing)
// We will resize our app's window big enough so that once the status bar
// is positioned at the bottom there will be enough room for the preview
// window to be w x h
//
int gnRecurse = 0;
void ResizeWindow(int w, int h)
{
RECT rcW, rcC;
int xExtra, yExtra;
int cyBorder = GetSystemMetrics(SM_CYBORDER);
gnRecurse++;
GetWindowRect(ghwndApp, &rcW);
GetClientRect(ghwndApp, &rcC);
xExtra = rcW.right - rcW.left - rcC.right;
yExtra = rcW.bottom - rcW.top - rcC.bottom + cyBorder + statusGetHeight();
rcC.right = w;
rcC.bottom = h;
SetWindowPos(ghwndApp, NULL, 0, 0, rcC.right + xExtra,
rcC.bottom + yExtra, SWP_NOZORDER | SWP_NOMOVE);
// we may need to recurse once. But more than that means the window cannot
// be made the size we want, trying will just stack fault.
//
if(gnRecurse == 1 && ((rcC.right + xExtra != rcW.right - rcW.left && w > GetSystemMetrics(SM_CXMIN)) ||
(rcC.bottom + yExtra != rcW.bottom - rcW.top)))
ResizeWindow(w,h);
gnRecurse--;
}
// Tear down everything downstream of a given filter
void RemoveDownstream(IBaseFilter *pf)
{
IPin *pP=0, *pTo=0;
ULONG u;
IEnumPins *pins = NULL;
PIN_INFO pininfo;
if (!pf)
return;
HRESULT hr = pf->EnumPins(&pins);
pins->Reset();
while(hr == NOERROR)
{
hr = pins->Next(1, &pP, &u);
if(hr == S_OK && pP)
{
pP->ConnectedTo(&pTo);
if(pTo)
{
hr = pTo->QueryPinInfo(&pininfo);
if(hr == NOERROR)
{
if(pininfo.dir == PINDIR_INPUT)
{
RemoveDownstream(pininfo.pFilter);
gcap.pFg->Disconnect(pTo);
gcap.pFg->Disconnect(pP);
gcap.pFg->RemoveFilter(pininfo.pFilter);
}
pininfo.pFilter->Release();
}
pTo->Release();
}
pP->Release();
}
}
if(pins)
pins->Release();
}
// Tear down everything downstream of the capture filters, so we can build
// a different capture graph. Notice that we never destroy the capture filters
// and WDM filters upstream of them, because then all the capture settings
// we've set would be lost.
//
void TearDownGraph()
{
SAFE_RELEASE(gcap.pSink);
SAFE_RELEASE(gcap.pConfigAviMux);
SAFE_RELEASE(gcap.pRender);
SAFE_RELEASE(gcap.pME);
SAFE_RELEASE(gcap.pDF);
if(gcap.pVW)
{
// stop drawing in our window, or we may get wierd repaint effects
gcap.pVW->put_Owner(NULL);
gcap.pVW->put_Visible(OAFALSE);
gcap.pVW->Release();
gcap.pVW = NULL;
}
// destroy the graph downstream of our capture filters
if(gcap.pVCap)
RemoveDownstream(gcap.pVCap);
if(gcap.pACap)
RemoveDownstream(gcap.pACap);
if(gcap.pVCap)
gcap.pBuilder->ReleaseFilters();
// potential debug output - what the graph looks like
// if (gcap.pFg) DumpGraph(gcap.pFg, 1);
#ifdef REGISTER_FILTERGRAPH
// Remove filter graph from the running object table
if(g_dwGraphRegister)
{
RemoveGraphFromRot(g_dwGraphRegister);
g_dwGraphRegister = 0;
}
#endif
gcap.fCaptureGraphBuilt = FALSE;
gcap.fPreviewGraphBuilt = FALSE;
gcap.fPreviewFaked = FALSE;
}
// create the capture filters of the graph. We need to keep them loaded from
// the beginning, so we can set parameters on them and have them remembered
//
BOOL InitCapFilters()
{
HRESULT hr=S_OK;
BOOL f;
gcap.fCCAvail = FALSE; // assume no closed captioning support
f = MakeBuilder();
if(!f)
{
ErrMsg(TEXT("Cannot instantiate graph builder"));
return FALSE;
}
//
// First, we need a Video Capture filter, and some interfaces
//
gcap.pVCap = NULL;
if(gcap.pmVideo != 0)
{
IPropertyBag *pBag;
gcap.wachFriendlyName[0] = 0;
hr = gcap.pmVideo->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pBag);
if(SUCCEEDED(hr))
{
VARIANT var;
var.vt = VT_BSTR;
hr = pBag->Read(L"FriendlyName", &var, NULL);
if(hr == NOERROR)
{
hr = StringCchCopyW(gcap.wachFriendlyName, sizeof(gcap.wachFriendlyName) / sizeof(gcap.wachFriendlyName[0]), var.bstrVal);
SysFreeString(var.bstrVal);
}
pBag->Release();
}
hr = gcap.pmVideo->BindToObject(0, 0, IID_IBaseFilter, (void**)&gcap.pVCap);
}
if(gcap.pVCap == NULL)
{
ErrMsg(TEXT("Error %x: Cannot create video capture filter"), hr);
goto InitCapFiltersFail;
}
//
// make a filtergraph, give it to the graph builder and put the video
// capture filter in the graph
//
f = MakeGraph();
if(!f)
{
ErrMsg(TEXT("Cannot instantiate filtergraph"));
goto InitCapFiltersFail;
}
hr = gcap.pBuilder->SetFiltergraph(gcap.pFg);
if(hr != NOERROR)
{
ErrMsg(TEXT("Cannot give graph to builder"));
goto InitCapFiltersFail;
}
// Add the video capture filter to the graph with its friendly name
hr = gcap.pFg->AddFilter(gcap.pVCap, gcap.wachFriendlyName);
if(hr != NOERROR)
{
ErrMsg(TEXT("Error %x: Cannot add vidcap to filtergraph"), hr);
goto InitCapFiltersFail;
}
// Calling FindInterface below will result in building the upstream
// section of the capture graph (any WDM TVTuners or Crossbars we might
// need).
// we use this interface to get the name of the driver
// Don't worry if it doesn't work: This interface may not be available
// until the pin is connected, or it may not be available at all.
// (eg: interface may not be available for some DV capture)
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMVideoCompression, (void **)&gcap.pVC);
if(hr != S_OK)
{
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMVideoCompression, (void **)&gcap.pVC);
}
// !!! What if this interface isn't supported?
// we use this interface to set the frame rate and get the capture size
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved,
gcap.pVCap, IID_IAMStreamConfig, (void **)&gcap.pVSC);
if(hr != NOERROR)
{
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMStreamConfig, (void **)&gcap.pVSC);
if(hr != NOERROR)
{
// this means we can't set frame rate (non-DV only)
ErrMsg(TEXT("Error %x: Cannot find VCapture:IAMStreamConfig"), hr);
}
}
gcap.fCapAudioIsRelevant = TRUE;
AM_MEDIA_TYPE *pmt;
// default capture format
if(gcap.pVSC && gcap.pVSC->GetFormat(&pmt) == S_OK)
{
// DV capture does not use a VIDEOINFOHEADER
if(pmt->formattype == FORMAT_VideoInfo)
{
// resize our window to the default capture size
ResizeWindow(HEADER(pmt->pbFormat)->biWidth,
ABS(HEADER(pmt->pbFormat)->biHeight));
}
if(pmt->majortype != MEDIATYPE_Video)
{
// This capture filter captures something other that pure video.
// Maybe it's DV or something? Anyway, chances are we shouldn't
// allow capturing audio separately, since our video capture
// filter may have audio combined in it already!
gcap.fCapAudioIsRelevant = FALSE;
gcap.fCapAudio = FALSE;
}
DeleteMediaType(pmt);
}
// we use this interface to bring up the 3 dialogs
// NOTE: Only the VfW capture filter supports this. This app only brings
// up dialogs for legacy VfW capture drivers, since only those have dialogs
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMVfwCaptureDialogs, (void **)&gcap.pDlg);
// Use the crossbar class to help us sort out all the possible video inputs
// The class needs to be given the capture filters ANALOGVIDEO input pin
{
IPin *pP = 0;
IEnumPins *pins=0;
ULONG n;
PIN_INFO pinInfo;
BOOL Found = FALSE;
IKsPropertySet *pKs=0;
GUID guid;
DWORD dw;
BOOL fMatch = FALSE;
gcap.pCrossbar = NULL;
if(SUCCEEDED(gcap.pVCap->EnumPins(&pins)))
{
while(!Found && (S_OK == pins->Next(1, &pP, &n)))
{
if(S_OK == pP->QueryPinInfo(&pinInfo))
{
if(pinInfo.dir == PINDIR_INPUT)
{
// is this pin an ANALOGVIDEOIN input pin?
if(pP->QueryInterface(IID_IKsPropertySet,
(void **)&pKs) == S_OK)
{
if(pKs->Get(AMPROPSETID_Pin,
AMPROPERTY_PIN_CATEGORY, NULL, 0,
&guid, sizeof(GUID), &dw) == S_OK)
{
if(guid == PIN_CATEGORY_ANALOGVIDEOIN)
fMatch = TRUE;
}
pKs->Release();
}
if(fMatch)
{
HRESULT hrCreate=S_OK;
gcap.pCrossbar = new CCrossbar(pP, &hrCreate);
if (!gcap.pCrossbar || FAILED(hrCreate))
break;
hr = gcap.pCrossbar->GetInputCount(&gcap.NumberOfVideoInputs);
Found = TRUE;
}
}
pinInfo.pFilter->Release();
}
pP->Release();
}
pins->Release();
}
}
// there's no point making an audio capture filter
if(gcap.fCapAudioIsRelevant == FALSE)
goto SkipAudio;
// create the audio capture filter, even if we are not capturing audio right
// now, so we have all the filters around all the time.
//
// We want an audio capture filter and some interfaces
//
if(gcap.pmAudio == 0)
{
// there are no audio capture devices. We'll only allow video capture
gcap.fCapAudio = FALSE;
goto SkipAudio;
}
gcap.pACap = NULL;
hr = gcap.pmAudio->BindToObject(0, 0, IID_IBaseFilter, (void**)&gcap.pACap);
if(gcap.pACap == NULL)
{
// there are no audio capture devices. We'll only allow video capture
gcap.fCapAudio = FALSE;
ErrMsg(TEXT("Cannot create audio capture filter"));
goto SkipAudio;
}
//
// put the audio capture filter in the graph
//
{
WCHAR wachAudioFriendlyName[256];
IPropertyBag *pBag;
wachAudioFriendlyName[0] = 0;
// Read the friendly name of the filter to assist with remote graph
// viewing through GraphEdit
hr = gcap.pmAudio->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pBag);
if(SUCCEEDED(hr))
{
VARIANT var;
var.vt = VT_BSTR;
hr = pBag->Read(L"FriendlyName", &var, NULL);
if(hr == NOERROR)
{
hr = StringCchCopyW(wachAudioFriendlyName, 256, var.bstrVal);
SysFreeString(var.bstrVal);
}
pBag->Release();
}
// We'll need this in the graph to get audio property pages
hr = gcap.pFg->AddFilter(gcap.pACap, wachAudioFriendlyName);
if(hr != NOERROR)
{
ErrMsg(TEXT("Error %x: Cannot add audio capture filter to filtergraph"), hr);
goto InitCapFiltersFail;
}
}
// Calling FindInterface below will result in building the upstream
// section of the capture graph (any WDM TVAudio's or Crossbars we might
// need).
// !!! What if this interface isn't supported?
// we use this interface to set the captured wave format
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Audio, gcap.pACap,
IID_IAMStreamConfig, (void **)&gcap.pASC);
if(hr != NOERROR)
{
ErrMsg(TEXT("Cannot find ACapture:IAMStreamConfig"));
}
SkipAudio:
// Can this filter do closed captioning?
IPin *pPin;
hr = gcap.pBuilder->FindPin(gcap.pVCap, PINDIR_OUTPUT, &PIN_CATEGORY_VBI,
NULL, FALSE, 0, &pPin);
if(hr != S_OK)
hr = gcap.pBuilder->FindPin(gcap.pVCap, PINDIR_OUTPUT, &PIN_CATEGORY_CC,
NULL, FALSE, 0, &pPin);
if(hr == S_OK)
{
pPin->Release();
gcap.fCCAvail = TRUE;
}
else
{
gcap.fCapCC = FALSE; // can't capture it, then
}
// potential debug output - what the graph looks like
// DumpGraph(gcap.pFg, 1);
return TRUE;
InitCapFiltersFail:
FreeCapFilters();
return FALSE;
}
// all done with the capture filters and the graph builder
//
void FreeCapFilters()
{
SAFE_RELEASE(gcap.pFg);
if( gcap.pBuilder )
{
delete gcap.pBuilder;
gcap.pBuilder = NULL;
}
SAFE_RELEASE(gcap.pVCap);
SAFE_RELEASE(gcap.pACap);
SAFE_RELEASE(gcap.pASC);
SAFE_RELEASE(gcap.pVSC);
SAFE_RELEASE(gcap.pVC);
SAFE_RELEASE(gcap.pDlg);
if(gcap.pCrossbar)
{
delete gcap.pCrossbar;
gcap.pCrossbar = NULL;
}
}
// build the capture graph
//
BOOL BuildCaptureGraph()
{
int cy, cyBorder;
HRESULT hr;
BOOL f;
AM_MEDIA_TYPE *pmt=0;
// we have one already
if(gcap.fCaptureGraphBuilt)
return TRUE;
// No rebuilding while we're running
if(gcap.fCapturing || gcap.fPreviewing)
return FALSE;
// We don't have the necessary capture filters
if(gcap.pVCap == NULL)
return FALSE;
if(gcap.pACap == NULL && gcap.fCapAudio)
return FALSE;
// no capture file name yet... we need one first
if(gcap.wszCaptureFile[0] == 0)
{
f = SetCaptureFile(ghwndApp);
if(!f)
return f;
}
// we already have another graph built... tear down the old one
if(gcap.fPreviewGraphBuilt)
TearDownGraph();
//
// We need a rendering section that will write the capture file out in AVI
// file format
//
GUID guid;
if( gcap.fMPEG2 )
{
guid = MEDIASUBTYPE_Mpeg2;
}
else
{
guid = MEDIASUBTYPE_Avi;
}
hr = gcap.pBuilder->SetOutputFileName(&guid, gcap.wszCaptureFile,
&gcap.pRender, &gcap.pSink);
if(hr != NOERROR)
{
ErrMsg(TEXT("Cannot set output file"));
goto SetupCaptureFail;
}
// Now tell the AVIMUX to write out AVI files that old apps can read properly.
// If we don't, most apps won't be able to tell where the keyframes are,
// slowing down editing considerably
// Doing this will cause one seek (over the area the index will go) when
// you capture past 1 Gig, but that's no big deal.
// NOTE: This is on by default, so it's not necessary to turn it on
// Also, set the proper MASTER STREAM
if( !gcap.fMPEG2 )
{
hr = gcap.pRender->QueryInterface(IID_IConfigAviMux, (void **)&gcap.pConfigAviMux);
if(hr == NOERROR && gcap.pConfigAviMux)
{
gcap.pConfigAviMux->SetOutputCompatibilityIndex(TRUE);
if(gcap.fCapAudio)
{
hr = gcap.pConfigAviMux->SetMasterStream(gcap.iMasterStream);
if(hr != NOERROR)
ErrMsg(TEXT("SetMasterStream failed!"));
}
}
}
//
// Render the video capture and preview pins - even if the capture filter only
// has a capture pin (and no preview pin) this should work... because the
// capture graph builder will use a smart tee filter to provide both capture
// and preview. We don't have to worry. It will just work.
//
// NOTE that we try to render the interleaved pin before the video pin, because
// if BOTH exist, it's a DV filter and the only way to get the audio is to use
// the interleaved pin. Using the Video pin on a DV filter is only useful if
// you don't want the audio.
if( !gcap.fMPEG2 )
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved,
gcap.pVCap, NULL, gcap.pRender);
if(hr != NOERROR)
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video,
gcap.pVCap, NULL, gcap.pRender);
if(hr != NOERROR)
{
ErrMsg(TEXT("Cannot render video capture stream"));
goto SetupCaptureFail;
}
}
if(gcap.fWantPreview)
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_PREVIEW, &MEDIATYPE_Interleaved,
gcap.pVCap, NULL, NULL);
if(hr == VFW_S_NOPREVIEWPIN)
{
// preview was faked up for us using the (only) capture pin
gcap.fPreviewFaked = TRUE;
}
else if(hr != S_OK)
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_PREVIEW, &MEDIATYPE_Video,
gcap.pVCap, NULL, NULL);
if(hr == VFW_S_NOPREVIEWPIN)
{
// preview was faked up for us using the (only) capture pin
gcap.fPreviewFaked = TRUE;
}
else if(hr != S_OK)
{
ErrMsg(TEXT("Cannot render video preview stream"));
goto SetupCaptureFail;
}
}
}
}
else
{
SmartPtr< IBaseFilter > sink;
if( &gcap.pSink )
{
gcap.pSink->QueryInterface( IID_IBaseFilter, reinterpret_cast<void **>( &sink ) );
}
hr = gcap.pBuilder->RenderStream(NULL,
&MEDIATYPE_Stream,
gcap.pVCap, NULL, sink);
}
//
// Render the audio capture pin?
//
if(!gcap.fMPEG2 && gcap.fCapAudio)
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Audio,
gcap.pACap, NULL, gcap.pRender);
if(hr != NOERROR)
{
ErrMsg(TEXT("Cannot render audio capture stream"));
goto SetupCaptureFail;
}
}
//
// Render the closed captioning pin? It could be a CC or a VBI category pin,
// depending on the capture driver
//
if(!gcap.fMPEG2 && gcap.fCapCC)
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_CC, NULL,
gcap.pVCap, NULL, gcap.pRender);
if(hr != NOERROR)
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_VBI, NULL,
gcap.pVCap, NULL, gcap.pRender);
if(hr != NOERROR)
{
ErrMsg(TEXT("Cannot render closed captioning"));
// so what? goto SetupCaptureFail;
}
}
// To preview and capture VBI at the same time, we can call this twice
if(gcap.fWantPreview)
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_VBI, NULL,
gcap.pVCap, NULL, NULL);
}
}
//
// Get the preview window to be a child of our app's window
//
// This will find the IVideoWindow interface on the renderer. It is
// important to ask the filtergraph for this interface... do NOT use
// ICaptureGraphBuilder2::FindInterface, because the filtergraph needs to
// know we own the window so it can give us display changed messages, etc.
if(!gcap.fMPEG2 && gcap.fWantPreview)
{
hr = gcap.pFg->QueryInterface(IID_IVideoWindow, (void **)&gcap.pVW);
if(hr != NOERROR && gcap.fWantPreview)
{
ErrMsg(TEXT("This graph cannot preview"));
}
else if(hr == NOERROR)
{
RECT rc;
gcap.pVW->put_Owner((OAHWND)ghwndApp); // We own the window now
gcap.pVW->put_WindowStyle(WS_CHILD); // you are now a child
// give the preview window all our space but where the status bar is
GetClientRect(ghwndApp, &rc);
cyBorder = GetSystemMetrics(SM_CYBORDER);
cy = statusGetHeight() + cyBorder;
rc.bottom -= cy;
gcap.pVW->SetWindowPosition(0, 0, rc.right, rc.bottom); // be this big
gcap.pVW->put_Visible(OATRUE);
}
}
// now tell it what frame rate to capture at. Just find the format it
// is capturing with, and leave everything alone but change the frame rate
if( !gcap.fMPEG2 )
{
hr = gcap.fUseFrameRate ? E_FAIL : NOERROR;
if(gcap.pVSC && gcap.fUseFrameRate)
{
hr = gcap.pVSC->GetFormat(&pmt);
// DV capture does not use a VIDEOINFOHEADER
if(hr == NOERROR)
{
if(pmt->formattype == FORMAT_VideoInfo)
{
VIDEOINFOHEADER *pvi = (VIDEOINFOHEADER *)pmt->pbFormat;
pvi->AvgTimePerFrame = (LONGLONG)(10000000 / gcap.FrameRate);
hr = gcap.pVSC->SetFormat(pmt);
}
DeleteMediaType(pmt);
}
}
if(hr != NOERROR)
ErrMsg(TEXT("Cannot set frame rate for capture"));
}
// now ask the filtergraph to tell us when something is completed or aborted
// (EC_COMPLETE, EC_USERABORT, EC_ERRORABORT). This is how we will find out
// if the disk gets full while capturing
hr = gcap.pFg->QueryInterface(IID_IMediaEventEx, (void **)&gcap.pME);
if(hr == NOERROR)
{
gcap.pME->SetNotifyWindow((OAHWND)ghwndApp, WM_FGNOTIFY, 0);
}
// potential debug output - what the graph looks like
// DumpGraph(gcap.pFg, 1);
// Add our graph to the running object table, which will allow
// the GraphEdit application to "spy" on our graph
#ifdef REGISTER_FILTERGRAPH
hr = AddGraphToRot(gcap.pFg, &g_dwGraphRegister);
if(FAILED(hr))
{
ErrMsg(TEXT("Failed to register filter graph with ROT! hr=0x%x"), hr);
g_dwGraphRegister = 0;
}
#endif
// All done.
gcap.fCaptureGraphBuilt = TRUE;
return TRUE;
SetupCaptureFail:
TearDownGraph();
return FALSE;
}
// build the preview graph!
//
// !!! PLEASE NOTE !!! Some new WDM devices have totally separate capture
// and preview settings. An application that wishes to preview and then
// capture may have to set the preview pin format using IAMStreamConfig on the
// preview pin, and then again on the capture pin to capture with that format.
// In this sample app, there is a separate page to set the settings on the
// capture pin and one for the preview pin. To avoid the user
// having to enter the same settings in 2 dialog boxes, an app can have its own
// UI for choosing a format (the possible formats can be enumerated using
// IAMStreamConfig) and then the app can programmatically call IAMStreamConfig
// to set the format on both pins.
//
BOOL BuildPreviewGraph()
{
int cy, cyBorder;
HRESULT hr;
AM_MEDIA_TYPE *pmt;
// we have one already
if(gcap.fPreviewGraphBuilt)
return TRUE;
// No rebuilding while we're running
if(gcap.fCapturing || gcap.fPreviewing)
return FALSE;
// We don't have the necessary capture filters
if(gcap.pVCap == NULL)
return FALSE;
if(gcap.pACap == NULL && gcap.fCapAudio)
return FALSE;
// we already have another graph built... tear down the old one
if(gcap.fCaptureGraphBuilt)
TearDownGraph();
//
// Render the preview pin - even if there is not preview pin, the capture
// graph builder will use a smart tee filter and provide a preview.
//
// !!! what about latency/buffer issues?
// NOTE that we try to render the interleaved pin before the video pin, because
// if BOTH exist, it's a DV filter and the only way to get the audio is to use
// the interleaved pin. Using the Video pin on a DV filter is only useful if
// you don't want the audio.
if( gcap.fMPEG2 )
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_PREVIEW,
&MEDIATYPE_Stream, gcap.pVCap, NULL, NULL);
if( FAILED( hr ) )
{
ErrMsg(TEXT("Cannot build MPEG2 preview graph!"));
}
}
else
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_PREVIEW,
&MEDIATYPE_Interleaved, gcap.pVCap, NULL, NULL);
if(hr == VFW_S_NOPREVIEWPIN)
{
// preview was faked up for us using the (only) capture pin
gcap.fPreviewFaked = TRUE;
}
else if(hr != S_OK)
{
// maybe it's DV?
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_PREVIEW,
&MEDIATYPE_Video, gcap.pVCap, NULL, NULL);
if(hr == VFW_S_NOPREVIEWPIN)
{
// preview was faked up for us using the (only) capture pin
gcap.fPreviewFaked = TRUE;
}
else if(hr != S_OK)
{
ErrMsg(TEXT("This graph cannot preview!"));
gcap.fPreviewGraphBuilt = FALSE;
return FALSE;
}
}
//
// Render the closed captioning pin? It could be a CC or a VBI category pin,
// depending on the capture driver
//
if(gcap.fCapCC)
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_CC, NULL,
gcap.pVCap, NULL, NULL);
if(hr != NOERROR)
{
hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_VBI, NULL,
gcap.pVCap, NULL, NULL);
if(hr != NOERROR)
{
ErrMsg(TEXT("Cannot render closed captioning"));
}
}
}
}
//
// Get the preview window to be a child of our app's window
//
// This will find the IVideoWindow interface on the renderer. It is
// important to ask the filtergraph for this interface... do NOT use
// ICaptureGraphBuilder2::FindInterface, because the filtergraph needs to
// know we own the window so it can give us display changed messages, etc.
hr = gcap.pFg->QueryInterface(IID_IVideoWindow, (void **)&gcap.pVW);
if(hr != NOERROR)
{
ErrMsg(TEXT("This graph cannot preview properly"));
}
else
{
//Find out if this is a DV stream
AM_MEDIA_TYPE * pmtDV;
if(gcap.pVSC && SUCCEEDED(gcap.pVSC->GetFormat(&pmtDV)))
{
if(pmtDV->formattype == FORMAT_DvInfo)
{
// in this case we want to set the size of the parent window to that of
// current DV resolution.
// We get that resolution from the IVideoWindow.
SmartPtr<IBasicVideo> pBV;
// If we got here, gcap.pVW is not NULL
ASSERT(gcap.pVW != NULL);
hr = gcap.pVW->QueryInterface(IID_IBasicVideo, (void**)&pBV);
if(SUCCEEDED(hr))
{
HRESULT hr1, hr2;
long lWidth, lHeight;
hr1 = pBV->get_VideoHeight(&lHeight);
hr2 = pBV->get_VideoWidth(&lWidth);
if(SUCCEEDED(hr1) && SUCCEEDED(hr2))
{
ResizeWindow(lWidth, abs(lHeight));
}
}
}
}
RECT rc;
gcap.pVW->put_Owner((OAHWND)ghwndApp); // We own the window now
gcap.pVW->put_WindowStyle(WS_CHILD); // you are now a child
// give the preview window all our space but where the status bar is
GetClientRect(ghwndApp, &rc);
cyBorder = GetSystemMetrics(SM_CYBORDER);
cy = statusGetHeight() + cyBorder;
rc.bottom -= cy;
gcap.pVW->SetWindowPosition(0, 0, rc.right, rc.bottom); // be this big
gcap.pVW->put_Visible(OATRUE);
}
// now tell it what frame rate to capture at. Just find the format it
// is capturing with, and leave everything alone but change the frame rate
// No big deal if it fails. It's just for preview
// !!! Should we then talk to the preview pin?
if(gcap.pVSC && gcap.fUseFrameRate)
{
hr = gcap.pVSC->GetFormat(&pmt);
// DV capture does not use a VIDEOINFOHEADER
if(hr == NOERROR)
{
if(pmt->formattype == FORMAT_VideoInfo)
{
VIDEOINFOHEADER *pvi = (VIDEOINFOHEADER *)pmt->pbFormat;
pvi->AvgTimePerFrame = (LONGLONG)(10000000 / gcap.FrameRate);
hr = gcap.pVSC->SetFormat(pmt);
if(hr != NOERROR)
ErrMsg(TEXT("%x: Cannot set frame rate for preview"), hr);
}
DeleteMediaType(pmt);
}
}
// make sure we process events while we're previewing!
hr = gcap.pFg->QueryInterface(IID_IMediaEventEx, (void **)&gcap.pME);
if(hr == NOERROR)
{
gcap.pME->SetNotifyWindow((OAHWND)ghwndApp, WM_FGNOTIFY, 0);
}
// potential debug output - what the graph looks like
// DumpGraph(gcap.pFg, 1);
// Add our graph to the running object table, which will allow
// the GraphEdit application to "spy" on our graph
#ifdef REGISTER_FILTERGRAPH
hr = AddGraphToRot(gcap.pFg, &g_dwGraphRegister);
if(FAILED(hr))
{
ErrMsg(TEXT("Failed to register filter graph with ROT! hr=0x%x"), hr);
g_dwGraphRegister = 0;
}
#endif
// All done.
gcap.fPreviewGraphBuilt = TRUE;
return TRUE;
}
// Start previewing
//
BOOL StartPreview()
{
// way ahead of you
if(gcap.fPreviewing)
return TRUE;
if(!gcap.fPreviewGraphBuilt)
return FALSE;
// run the graph
IMediaControl *pMC = NULL;
HRESULT hr = gcap.pFg->QueryInterface(IID_IMediaControl, (void **)&pMC);
if(SUCCEEDED(hr))
{
hr = pMC->Run();
if(FAILED(hr))
{
// stop parts that ran
pMC->Stop();
}
pMC->Release();
}
if(FAILED(hr))
{
ErrMsg(TEXT("Error %x: Cannot run preview graph"), hr);
return FALSE;
}
gcap.fPreviewing = TRUE;
return TRUE;
}
// stop the preview graph
//
BOOL StopPreview()
{
// way ahead of you
if(!gcap.fPreviewing)
{
return FALSE;
}
// stop the graph
IMediaControl *pMC = NULL;
HRESULT hr = gcap.pFg->QueryInterface(IID_IMediaControl, (void **)&pMC);
if(SUCCEEDED(hr))
{
hr = pMC->Stop();
pMC->Release();
}
if(FAILED(hr))
{
ErrMsg(TEXT("Error %x: Cannot stop preview graph"), hr);
return FALSE;
}
gcap.fPreviewing = FALSE;
// get rid of menu garbage
InvalidateRect(ghwndApp, NULL, TRUE);
return TRUE;
}
// start the capture graph
//
BOOL StartCapture()
{
BOOL f, fHasStreamControl;
HRESULT hr;
// way ahead of you
if(gcap.fCapturing)
return TRUE;
// or we'll get confused
if(gcap.fPreviewing)
StopPreview();
// or we'll crash
if(!gcap.fCaptureGraphBuilt)
return FALSE;
// This amount will be subtracted from the number of dropped and not
// dropped frames reported by the filter. Since we might be having the
// filter running while the pin is turned off, we don't want any of the
// frame statistics from the time the pin is off interfering with the
// statistics we gather while the pin is on
gcap.lDroppedBase = 0;
gcap.lNotBase = 0;
REFERENCE_TIME start = MAXLONGLONG, stop = MAXLONGLONG;
// don't capture quite yet...
hr = gcap.pBuilder->ControlStream(&PIN_CATEGORY_CAPTURE, NULL,
NULL, &start, NULL, 0, 0);
// Do we have the ability to control capture and preview separately?
fHasStreamControl = SUCCEEDED(hr);
// prepare to run the graph
IMediaControl *pMC = NULL;
hr = gcap.pFg->QueryInterface(IID_IMediaControl, (void **)&pMC);
if(FAILED(hr))
{
ErrMsg(TEXT("Error %x: Cannot get IMediaControl"), hr);
return FALSE;
}
// If we were able to keep capture off, then we can
// run the graph now for frame accurate start later yet still showing a
// preview. Otherwise, we can't run the graph yet without capture
// starting too, so we'll pause it so the latency between when they
// press a key and when capture begins is still small (but they won't have
// a preview while they wait to press a key)
if(fHasStreamControl)
hr = pMC->Run();
else
hr = pMC->Pause();
if(FAILED(hr))
{
// stop parts that started
pMC->Stop();
pMC->Release();
ErrMsg(TEXT("Error %x: Cannot start graph"), hr);
return FALSE;
}
// press a key to start capture
f = DoDialog(ghwndApp, IDD_PressAKeyDialog, (DLGPROC)PressAKeyProc, 0);
if(!f)
{
pMC->Stop();
pMC->Release();
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
return f;
}
// Start capture NOW!
if(fHasStreamControl)
{
// we may not have this yet
if(!gcap.pDF)
{
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMDroppedFrames, (void **)&gcap.pDF);
if(hr != NOERROR)
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMDroppedFrames, (void **)&gcap.pDF);
}
// turn the capture pin on now!
hr = gcap.pBuilder->ControlStream(&PIN_CATEGORY_CAPTURE, NULL,
NULL, NULL, &stop, 0, 0);
// make note of the current dropped frame counts
if(gcap.pDF)
{
gcap.pDF->GetNumDropped(&gcap.lDroppedBase);
gcap.pDF->GetNumNotDropped(&gcap.lNotBase);
}
}
else
{
hr = pMC->Run();
if(FAILED(hr))
{
// stop parts that started
pMC->Stop();
pMC->Release();
ErrMsg(TEXT("Error %x: Cannot run graph"), hr);
return FALSE;
}
}
pMC->Release();
// when did we start capture?
gcap.lCapStartTime = timeGetTime();
// update status bar 30 times per second - #captured, #dropped
SetTimer(ghwndApp, 1, 33, NULL);
gcap.fCapturing = TRUE;
return TRUE;
}
// stop the capture graph
//
BOOL StopCapture()
{
// way ahead of you
if(!gcap.fCapturing)
{
return FALSE;
}
// stop the graph
IMediaControl *pMC = NULL;
HRESULT hr = gcap.pFg->QueryInterface(IID_IMediaControl, (void **)&pMC);
if(SUCCEEDED(hr))
{
hr = pMC->Stop();
pMC->Release();
}
if(FAILED(hr))
{
ErrMsg(TEXT("Error %x: Cannot stop graph"), hr);
return FALSE;
}
// when the graph was stopped
gcap.lCapStopTime = timeGetTime();
// no more status bar updates
KillTimer(ghwndApp, 1);
// one last time for the final count and all the stats
UpdateStatus(TRUE);
gcap.fCapturing = FALSE;
// get rid of menu garbage
InvalidateRect(ghwndApp, NULL, TRUE);
return TRUE;
}
// Let's talk about UI for a minute. There are many programmatic interfaces
// you can use to program a capture filter or related filter to capture the
// way you want it to.... eg: IAMStreamConfig, IAMVideoCompression,
// IAMCrossbar, IAMTVTuner, IAMTVAudio, IAMAnalogVideoDecoder, IAMCameraControl,
// IAMVideoProcAmp, etc.
//
// But you probably want some UI to let the user play with all these settings.
// For new WDM-style capture devices, we offer some default UI you can use.
// The code below shows how to bring up all of the dialog boxes supported
// by any capture filters.
//
// The following code shows you how you can bring up all of the
// dialogs supported by a particular object at once on a big page with lots
// of thumb tabs. You do this by starting with an interface on the object that
// you want, and using ISpecifyPropertyPages to get the whole list, and
// OleCreatePropertyFrame to bring them all up. This way you will get custom
// property pages a filter has, too, that are not one of the standard pages that
// you know about. There are at least 9 objects that may have property pages.
// Your app already has 2 of the object pointers, the video capture filter and
// the audio capture filter (let's call them pVCap and pACap)
// 1. The video capture filter - pVCap
// 2. The video capture filter's capture pin - get this by calling
// FindInterface(&PIN_CATEGORY_CAPTURE, pVCap, IID_IPin, &pX);
// 3. The video capture filter's preview pin - get this by calling
// FindInterface(&PIN_CATEGORY_PREVIEW, pVCap, IID_IPin, &pX);
// 4. The audio capture filter - pACap
// 5. The audio capture filter's capture pin - get this by calling
// FindInterface(&PIN_CATEGORY_CAPTURE, pACap, IID_IPin, &pX);
// 6. The crossbar connected to the video capture filter - get this by calling
// FindInterface(NULL, pVCap, IID_IAMCrossbar, &pX);
// 7. There is a possible second crossbar to control audio - get this by
// looking upstream of the first crossbar like this:
// FindInterface(&LOOK_UPSTREAM_ONLY, pX, IID_IAMCrossbar, &pX2);
// 8. The TV Tuner connected to the video capture filter - get this by calling
// FindInterface(NULL, pVCap, IID_IAMTVTuner, &pX);
// 9. The TV Audio connected to the audio capture filter - get this by calling
// FindInterface(NULL, pACap, IID_IAMTVAudio, &pX);
// 10. We have a helper class, CCrossbar, which makes the crossbar issue less
// confusing. In fact, although not supported here, there may be more than
// two crossbars, arranged in many different ways. An application may not
// wish to have separate dialogs for each crossbar, but instead hide the
// complexity and simply offer the user a list of inputs that can be chosen.
// This list represents all the unique inputs from all the crossbars.
// The crossbar helper class does this and offers that list as #10. It is
// expected that an application will either provide the crossbar dialogs
// above (#6 and #7) OR provide the input list (this #10), but not both.
// That would be confusing because if you select an input using dialog 6 or
// 7 the input list here in #10 won't know about your choice.
//
// Your last choice for UI is to make your own pages, and use the results of
// your custom page to call the interfaces programmatically.
void MakeMenuOptions()
{
HRESULT hr;
HMENU hMenuSub = GetSubMenu(GetMenu(ghwndApp), 2); // Options menu
// remove any old choices from the last device
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
RemoveMenu(hMenuSub, 4, MF_BYPOSITION);
int zz = 0;
gcap.iFormatDialogPos = -1;
gcap.iSourceDialogPos = -1;
gcap.iDisplayDialogPos = -1;
gcap.iVCapDialogPos = -1;
gcap.iVCrossbarDialogPos = -1;
gcap.iTVTunerDialogPos = -1;
gcap.iACapDialogPos = -1;
gcap.iACrossbarDialogPos = -1;
gcap.iTVAudioDialogPos = -1;
gcap.iVCapCapturePinDialogPos = -1;
gcap.iVCapPreviewPinDialogPos = -1;
gcap.iACapCapturePinDialogPos = -1;
// If this device supports the old legacy UI dialogs, offer them
if(gcap.pDlg)
{
hr = gcap.pDlg->HasDialog(VfwCaptureDialog_Format);
if(SUCCEEDED(hr) && S_FALSE != hr)
{
AppendMenu(hMenuSub, MF_STRING, MENU_DIALOG0 + zz, TEXT("Video Format..."));
gcap.iFormatDialogPos = zz++;
}
hr = gcap.pDlg->HasDialog(VfwCaptureDialog_Source);
if(SUCCEEDED(hr) && S_FALSE != hr)
{
AppendMenu(hMenuSub, MF_STRING, MENU_DIALOG0 + zz, TEXT("Video Source..."));
gcap.iSourceDialogPos = zz++;
}
hr = gcap.pDlg->HasDialog(VfwCaptureDialog_Display);
if(SUCCEEDED(hr) && S_FALSE != hr)
{
AppendMenu(hMenuSub, MF_STRING, MENU_DIALOG0 + zz, TEXT("Video Display..."));
gcap.iDisplayDialogPos = zz++;
}
}
// Also check the audio capture filter at this point, since even non wdm devices
// may support an IAMAudioInputMixer property page (we'll also get any wdm filter
// properties here as well). We'll get any audio capture pin property pages just
// a bit later.
if(gcap.pACap != NULL)
{
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = gcap.pACap->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pSpec);
if(SUCCEEDED(hr))
{
hr = pSpec->GetPages(&cauuid);
if(SUCCEEDED(hr) && cauuid.cElems > 0)
{
AppendMenu(hMenuSub,MF_STRING,MENU_DIALOG0+zz, TEXT("Audio Capture Filter..."));
gcap.iACapDialogPos = zz++;
CoTaskMemFree(cauuid.pElems);
}
pSpec->Release();
}
}
// don't bother looking for new property pages if the old ones are supported
// or if we don't have a capture filter
if(gcap.pVCap == NULL || gcap.iFormatDialogPos != -1)
return;
// New WDM devices support new UI and new interfaces.
// Your app can use some default property
// pages for UI if you'd like (like we do here) or if you don't like our
// dialog boxes, feel free to make your own and programmatically set
// the capture options through interfaces like IAMCrossbar, IAMCameraControl
// etc.
// There are 9 objects that might support property pages.
// Let's go through them.
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
// 1. the video capture filter itself
hr = gcap.pVCap->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pSpec);
if(SUCCEEDED(hr))
{
hr = pSpec->GetPages(&cauuid);
if(SUCCEEDED(hr) && cauuid.cElems > 0)
{
AppendMenu(hMenuSub,MF_STRING,MENU_DIALOG0+zz, TEXT("Video Capture Filter..."));
gcap.iVCapDialogPos = zz++;
CoTaskMemFree(cauuid.pElems);
}
pSpec->Release();
}
// 2. The video capture capture pin
IAMStreamConfig *pSC;
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved,
gcap.pVCap, IID_IAMStreamConfig, (void **)&pSC);
if(FAILED(hr))
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMStreamConfig, (void **)&pSC);
if(SUCCEEDED(hr))
{
hr = pSC->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pSpec);
if(SUCCEEDED(hr))
{
hr = pSpec->GetPages(&cauuid);
if(SUCCEEDED(hr) && cauuid.cElems > 0)
{
AppendMenu(hMenuSub,MF_STRING,MENU_DIALOG0+zz, TEXT("Video Capture Pin..."));
gcap.iVCapCapturePinDialogPos = zz++;
CoTaskMemFree(cauuid.pElems);
}
pSpec->Release();
}
pSC->Release();
}
// 3. The video capture preview pin.
// This basically sets the format being previewed. Typically, you
// want to capture and preview using the SAME format, instead of having to
// enter the same value in 2 dialog boxes. For a discussion on this, see
// the comment above the MakePreviewGraph function.
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_PREVIEW,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMStreamConfig, (void **)&pSC);
if(FAILED(hr))
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_PREVIEW,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMStreamConfig, (void **)&pSC);
if(SUCCEEDED(hr))
{
hr = pSC->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pSpec);
if(SUCCEEDED(hr))
{
hr = pSpec->GetPages(&cauuid);
if(SUCCEEDED(hr) && cauuid.cElems > 0)
{
AppendMenu(hMenuSub,MF_STRING,MENU_DIALOG0+zz,TEXT("Video Preview Pin..."));
gcap.iVCapPreviewPinDialogPos = zz++;
CoTaskMemFree(cauuid.pElems);
}
pSpec->Release();
}
pSC->Release();
}
// 4 & 5. The video crossbar, and a possible second crossbar
IAMCrossbar *pX, *pX2;
IBaseFilter *pXF;
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMCrossbar, (void **)&pX);
if(FAILED(hr))
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMCrossbar, (void **)&pX);
if(SUCCEEDED(hr))
{
hr = pX->QueryInterface(IID_IBaseFilter, (void **)&pXF);
if(SUCCEEDED(hr))
{
hr = pX->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pSpec);
if(SUCCEEDED(hr))
{
hr = pSpec->GetPages(&cauuid);
if(SUCCEEDED(hr) && cauuid.cElems > 0)
{
AppendMenu(hMenuSub,MF_STRING,MENU_DIALOG0+zz,
TEXT("Video Crossbar..."));
gcap.iVCrossbarDialogPos = zz++;
CoTaskMemFree(cauuid.pElems);
}
pSpec->Release();
}
hr = gcap.pBuilder->FindInterface(&LOOK_UPSTREAM_ONLY, NULL, pXF,
IID_IAMCrossbar, (void **)&pX2);
if(SUCCEEDED(hr))
{
hr = pX2->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pSpec);
if(SUCCEEDED(hr))
{
hr = pSpec->GetPages(&cauuid);
if(SUCCEEDED(hr) && cauuid.cElems > 0)
{
AppendMenu(hMenuSub,MF_STRING,MENU_DIALOG0+zz, TEXT("Second Crossbar..."));
gcap.iACrossbarDialogPos = zz++;
CoTaskMemFree(cauuid.pElems);
}
pSpec->Release();
}
pX2->Release();
}
pXF->Release();
}
pX->Release();
}
// 6. The TVTuner
IAMTVTuner *pTV;
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMTVTuner, (void **)&pTV);
if(FAILED(hr))
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMTVTuner, (void **)&pTV);
if(SUCCEEDED(hr))
{
hr = pTV->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pSpec);
if(SUCCEEDED(hr))
{
hr = pSpec->GetPages(&cauuid);
if(SUCCEEDED(hr) && cauuid.cElems > 0)
{
AppendMenu(hMenuSub,MF_STRING,MENU_DIALOG0+zz, TEXT("TV Tuner..."));
gcap.iTVTunerDialogPos = zz++;
CoTaskMemFree(cauuid.pElems);
}
pSpec->Release();
}
pTV->Release();
}
// no audio capture, we're done
if(gcap.pACap == NULL)
return;
// 7. The Audio capture filter itself... Thanks anyway, but we got these already
// 8. The Audio capture pin
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Audio, gcap.pACap,
IID_IAMStreamConfig, (void **)&pSC);
if(SUCCEEDED(hr))
{
hr = pSC->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pSpec);
if(SUCCEEDED(hr))
{
hr = pSpec->GetPages(&cauuid);
if(SUCCEEDED(hr) && cauuid.cElems > 0)
{
AppendMenu(hMenuSub,MF_STRING,MENU_DIALOG0+zz, TEXT("Audio Capture Pin..."));
gcap.iACapCapturePinDialogPos = zz++;
CoTaskMemFree(cauuid.pElems);
}
pSpec->Release();
}
pSC->Release();
}
// 9. The TV Audio filter
IAMTVAudio *pTVA;
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Audio, gcap.pACap,
IID_IAMTVAudio, (void **)&pTVA);
if(SUCCEEDED(hr))
{
hr = pTVA->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pSpec);
if(SUCCEEDED(hr))
{
hr = pSpec->GetPages(&cauuid);
if(SUCCEEDED(hr) && cauuid.cElems > 0)
{
AppendMenu(hMenuSub,MF_STRING,MENU_DIALOG0+zz, TEXT("TV Audio..."));
gcap.iTVAudioDialogPos = zz++;
CoTaskMemFree(cauuid.pElems);
}
pSpec->Release();
}
pTVA->Release();
}
// 10. Crossbar class helper menu item, to let you choose an input
if(gcap.pCrossbar && gcap.NumberOfVideoInputs)
{
gcap.hMenuPopup = CreatePopupMenu();
LONG j;
LONG PhysicalType;
TCHAR buf[MAX_PATH];
LONG InputToEnable = -1;
gcap.iVideoInputMenuPos = zz++;
AppendMenu(hMenuSub, MF_SEPARATOR, 0, NULL);
for(j = 0; j < gcap.NumberOfVideoInputs; j++)
{
hr = gcap.pCrossbar->GetInputType(j, &PhysicalType);
ASSERT(hr == S_OK);
hr = gcap.pCrossbar->GetInputName(j, buf, sizeof (buf));
ASSERT(hr == S_OK);
AppendMenu(gcap.hMenuPopup,MF_STRING,MENU_DIALOG0+zz, buf);
zz++;
// Route the first TVTuner by default
if((PhysicalType == PhysConn_Video_Tuner) && InputToEnable == -1)
{
InputToEnable = j;
}
}
AppendMenu(hMenuSub, MF_STRING | MF_POPUP, (UINT_PTR)gcap.hMenuPopup, TEXT("Video Input"));
if(InputToEnable == -1)
{
InputToEnable = 0;
}
CheckMenuItem(gcap.hMenuPopup, InputToEnable, MF_BYPOSITION | MF_CHECKED);
gcap.pCrossbar->SetInputIndex(InputToEnable);
}
// !!! anything needed to delete the popup when selecting a new input?
}
// how many captured/dropped so far
//
void UpdateStatus(BOOL fAllStats)
{
HRESULT hr;
LONG lDropped, lNot=0, lAvgFrameSize;
TCHAR tach[160];
// we use this interface to get the number of captured and dropped frames
// NOTE: We cannot query for this interface earlier, as it may not be
// available until the pin is connected
if(!gcap.pDF)
{
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMDroppedFrames, (void **)&gcap.pDF);
if(hr != S_OK)
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMDroppedFrames, (void **)&gcap.pDF);
}
// this filter can't tell us dropped frame info.
if(!gcap.pDF)
{
statusUpdateStatus(ghwndStatus, TEXT("Filter cannot report capture information"));
return;
}
hr = gcap.pDF->GetNumDropped(&lDropped);
if(hr == S_OK)
hr = gcap.pDF->GetNumNotDropped(&lNot);
if(hr != S_OK)
return;
lDropped -= gcap.lDroppedBase;
lNot -= gcap.lNotBase;
if(!fAllStats)
{
LONG lTime = timeGetTime() - gcap.lCapStartTime;
hr = StringCchPrintf(tach, 160, TEXT("Captured %d frames (%d dropped) %d.%dsec\0"), lNot,
lDropped, lTime / 1000,
lTime / 100 - lTime / 1000 * 10);
statusUpdateStatus(ghwndStatus, tach);
return;
}
// we want all possible stats, including capture time and actual acheived
// frame rate and data rate (as opposed to what we tried to get). These
// numbers are an indication that though we dropped frames just now, if we
// chose a data rate and frame rate equal to the numbers I'm about to
// print, we probably wouldn't drop any frames.
// average size of frame captured
hr = gcap.pDF->GetAverageFrameSize(&lAvgFrameSize);
if(hr != S_OK)
return;
// how long capture lasted
LONG lDurMS = gcap.lCapStopTime - gcap.lCapStartTime;
double flFrame; // acheived frame rate
LONG lData; // acheived data rate
if(lDurMS > 0)
{
flFrame = (double)(LONGLONG)lNot * 1000. /
(double)(LONGLONG)lDurMS;
lData = (LONG)(LONGLONG)(lNot / (double)(LONGLONG)lDurMS *
1000. * (double)(LONGLONG)lAvgFrameSize);
}
else
{
flFrame = 0.;
lData = 0;
}
hr = StringCchPrintf(tach, 160, TEXT("Captured %d frames in %d.%d sec (%d dropped): %d.%d fps %d.%d Meg/sec\0"),
lNot, lDurMS / 1000, lDurMS / 100 - lDurMS / 1000 * 10,
lDropped, (int)flFrame,
(int)(flFrame * 10.) - (int)flFrame * 10,
lData / 1000000,
lData / 1000 - (lData / 1000000 * 1000));
statusUpdateStatus(ghwndStatus, tach);
}
// Check the devices we're currently using and make filters for them
//
void ChooseDevices(IMoniker *pmVideo, IMoniker *pmAudio)
{
#define VERSIZE 40
#define DESCSIZE 80
int versize = VERSIZE;
int descsize = DESCSIZE;
WCHAR wachVer[VERSIZE]={0}, wachDesc[DESCSIZE]={0};
TCHAR tachStatus[VERSIZE + DESCSIZE + 5]={0};
// they chose a new device. rebuild the graphs
if(gcap.pmVideo != pmVideo || gcap.pmAudio != pmAudio)
{
if(pmVideo)
{
pmVideo->AddRef();
}
if(pmAudio)
{
pmAudio->AddRef();
}
IMonRelease(gcap.pmVideo);
IMonRelease(gcap.pmAudio);
gcap.pmVideo = pmVideo;
gcap.pmAudio = pmAudio;
if(gcap.fPreviewing)
StopPreview();
if(gcap.fCaptureGraphBuilt || gcap.fPreviewGraphBuilt)
TearDownGraph();
FreeCapFilters();
InitCapFilters();
if(gcap.fWantPreview) // were we previewing?
{
BuildPreviewGraph();
StartPreview();
}
MakeMenuOptions(); // the UI choices change per device
}
// Set the check marks for the devices menu.
int i;
for(i = 0; i < NUMELMS(gcap.rgpmVideoMenu); i++)
{
if(gcap.rgpmVideoMenu[i] == NULL)
break;
CheckMenuItem(GetMenu(ghwndApp),
MENU_VDEVICE0 + i,
(S_OK == gcap.rgpmVideoMenu[i]->IsEqual(gcap.pmVideo)) ? MF_CHECKED : MF_UNCHECKED);
}
for(i = 0; i < NUMELMS(gcap.rgpmAudioMenu); i++)
{
if(gcap.rgpmAudioMenu[i] == NULL)
break;
CheckMenuItem(GetMenu(ghwndApp), MENU_ADEVICE0 + i,
(S_OK == gcap.rgpmAudioMenu[i]->IsEqual(gcap.pmAudio)) ? MF_CHECKED : MF_UNCHECKED);
}
// Put the video driver name in the status bar - if the filter supports
// IAMVideoCompression::GetInfo, that's the best way to get the name and
// the version. Otherwise use the name we got from device enumeration
// as a fallback.
if(gcap.pVC)
{
HRESULT hr = gcap.pVC->GetInfo(wachVer, &versize, wachDesc, &descsize,
NULL, NULL, NULL, NULL);
if(hr == S_OK)
{
// It's possible that the call succeeded without actually filling
// in information for description and version. If these strings
// are empty, just display the device's friendly name.
if(wcslen(wachDesc) && wcslen(wachVer))
{
hr = StringCchPrintf(tachStatus, VERSIZE + DESCSIZE + 5, TEXT("%s - %s\0"), wachDesc, wachVer);
statusUpdateStatus(ghwndStatus, tachStatus);
return;
}
}
}
// Since the GetInfo method failed (or the interface did not exist),
// display the device's friendly name.
statusUpdateStatus(ghwndStatus, gcap.wachFriendlyName);
}
void ChooseDevices(TCHAR *szVideo, TCHAR *szAudio)
{
WCHAR wszVideo[1024], wszAudio[1024];
StringCchCopyN(wszVideo, NUMELMS(wszVideo), szVideo, NUMELMS(wszVideo)-1);
StringCchCopyN(wszAudio, NUMELMS(wszAudio), szAudio, NUMELMS(wszAudio)-1);
wszVideo[1023] = wszAudio[1023] = 0; // Null-terminate
IBindCtx *lpBC=0;
IMoniker *pmVideo = 0, *pmAudio = 0;
HRESULT hr = CreateBindCtx(0, &lpBC);
if(SUCCEEDED(hr))
{
DWORD dwEaten;
hr = MkParseDisplayName(lpBC, wszVideo, &dwEaten, &pmVideo);
hr = MkParseDisplayName(lpBC, wszAudio, &dwEaten, &pmAudio);
lpBC->Release();
}
// Handle the case where the video capture device used for the previous session
// is not available now.
BOOL bFound = FALSE;
if(pmVideo != NULL)
{
for(int i = 0; i < NUMELMS(gcap.rgpmVideoMenu); i++)
{
if(gcap.rgpmVideoMenu[i] != NULL &&
S_OK == gcap.rgpmVideoMenu[i]->IsEqual(pmVideo))
{
bFound = TRUE;
break;
}
}
}
if(!bFound)
{
if(gcap.iNumVCapDevices > 0)
{
IMonRelease(pmVideo);
ASSERT(gcap.rgpmVideoMenu[0] != NULL);
pmVideo = gcap.rgpmVideoMenu[0];
pmVideo->AddRef();
}
else
goto CleanUp;
}
ChooseDevices(pmVideo, pmAudio);
CleanUp:
IMonRelease(pmVideo);
IMonRelease(pmAudio);
}
// put all installed video and audio devices in the menus
//
void AddDevicesToMenu()
{
if(gcap.fDeviceMenuPopulated)
{
return;
}
gcap.fDeviceMenuPopulated = true;
gcap.iNumVCapDevices = 0;
UINT uIndex = 0;
HMENU hMenuSub;
HRESULT hr;
BOOL bCheck = FALSE;
hMenuSub = GetSubMenu(GetMenu(ghwndApp), 1); // Devices menu
// Clean the sub menu
int iMenuItems = GetMenuItemCount(hMenuSub);
if(iMenuItems == -1)
{
ErrMsg(TEXT("Error Cleaning Devices Menu"));
return;
}
else if(iMenuItems > 0)
{
for(int i = 0; i < iMenuItems; i++)
{
RemoveMenu(hMenuSub, 0, MF_BYPOSITION);
}
}
for(int i = 0; i < NUMELMS(gcap.rgpmVideoMenu); i++)
{
IMonRelease(gcap.rgpmVideoMenu[i]);
}
for(int i = 0; i < NUMELMS(gcap.rgpmAudioMenu); i++)
{
IMonRelease(gcap.rgpmAudioMenu[i]);
}
// enumerate all video capture devices
ICreateDevEnum *pCreateDevEnum=0;
hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
IID_ICreateDevEnum, (void**)&pCreateDevEnum);
if(hr != NOERROR)
{
ErrMsg(TEXT("Error Creating Device Enumerator"));
return;
}
IEnumMoniker *pEm=0;
hr = pCreateDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, &pEm, 0);
if(hr != NOERROR)
{
ErrMsg(TEXT("Sorry, you have no video capture hardware.\r\n\r\n")
TEXT("Video capture will not function properly."));
goto EnumAudio;
}
pEm->Reset();
ULONG cFetched;
IMoniker *pM;
while(hr = pEm->Next(1, &pM, &cFetched), hr==S_OK)
{
IPropertyBag *pBag=0;
hr = pM->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pBag);
if(SUCCEEDED(hr))
{
VARIANT var;
var.vt = VT_BSTR;
hr = pBag->Read(L"FriendlyName", &var, NULL);
if(hr == NOERROR)
{
AppendMenu(hMenuSub, MF_STRING, MENU_VDEVICE0 + uIndex,
var.bstrVal);
if(gcap.pmVideo != 0 && (S_OK == gcap.pmVideo->IsEqual(pM)))
bCheck = TRUE;
CheckMenuItem(hMenuSub, MENU_VDEVICE0 + uIndex,
(bCheck ? MF_CHECKED : MF_UNCHECKED));
EnableMenuItem(hMenuSub, MENU_VDEVICE0 + uIndex,
(gcap.fCapturing ? MF_DISABLED : MF_ENABLED));
bCheck = FALSE;
SysFreeString(var.bstrVal);
ASSERT(gcap.rgpmVideoMenu[uIndex] == 0);
gcap.rgpmVideoMenu[uIndex] = pM;
pM->AddRef();
}
pBag->Release();
}
pM->Release();
uIndex++;
}
pEm->Release();
gcap.iNumVCapDevices = uIndex;
// separate the video and audio devices
AppendMenu(hMenuSub, MF_SEPARATOR, 0, NULL);
EnumAudio:
// enumerate all audio capture devices
uIndex = 0;
bCheck = FALSE;
ASSERT(pCreateDevEnum != NULL);
hr = pCreateDevEnum->CreateClassEnumerator(CLSID_AudioInputDeviceCategory, &pEm, 0);
pCreateDevEnum->Release();
if(hr != NOERROR)
return;
pEm->Reset();
while(hr = pEm->Next(1, &pM, &cFetched), hr==S_OK)
{
IPropertyBag *pBag;
hr = pM->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pBag);
if(SUCCEEDED(hr))
{
VARIANT var;
var.vt = VT_BSTR;
hr = pBag->Read(L"FriendlyName", &var, NULL);
if(hr == NOERROR)
{
AppendMenu(hMenuSub, MF_STRING, MENU_ADEVICE0 + uIndex,
var.bstrVal);
if(gcap.pmAudio != 0 && (S_OK == gcap.pmAudio->IsEqual(pM)))
bCheck = TRUE;
CheckMenuItem(hMenuSub, MENU_ADEVICE0 + uIndex,
(bCheck ? MF_CHECKED : MF_UNCHECKED));
EnableMenuItem(hMenuSub, MENU_ADEVICE0 + uIndex,
(gcap.fCapturing ? MF_DISABLED : MF_ENABLED));
bCheck = FALSE;
SysFreeString(var.bstrVal);
ASSERT(gcap.rgpmAudioMenu[uIndex] == 0);
gcap.rgpmAudioMenu[uIndex] = pM;
pM->AddRef();
}
pBag->Release();
}
pM->Release();
uIndex++;
}
pEm->Release();
}
// Allow the user to choose a frame rate
//
void ChooseFrameRate()
{
double rate = gcap.FrameRate;
DoDialog(ghwndApp, IDD_FrameRateDialog, (DLGPROC)FrameRateProc, 0);
HRESULT hr = E_FAIL;
// If somebody unchecks "use frame rate" it means we will no longer
// tell the filter what frame rate to use... it will either continue
// using the last one, or use some default, or if you bring up a dialog
// box that has frame rate choices, it will obey them.
// new frame rate?
if(gcap.fUseFrameRate && gcap.FrameRate != rate)
{
if(gcap.fPreviewing)
StopPreview();
// now tell it what frame rate to capture at. Just find the format it
// is capturing with, and leave everything else alone
if(gcap.pVSC)
{
AM_MEDIA_TYPE *pmt;
hr = gcap.pVSC->GetFormat(&pmt);
// DV capture does not use a VIDEOINFOHEADER
if(hr == NOERROR)
{
if(pmt->formattype == FORMAT_VideoInfo)
{
VIDEOINFOHEADER *pvi = (VIDEOINFOHEADER *)pmt->pbFormat;
pvi->AvgTimePerFrame =(LONGLONG)(10000000 / gcap.FrameRate);
hr = gcap.pVSC->SetFormat(pmt);
if(hr != S_OK)
ErrMsg(TEXT("%x: Cannot set new frame rate"), hr);
}
DeleteMediaType(pmt);
}
}
if(hr != NOERROR)
ErrMsg(TEXT("Cannot set frame rate for capture"));
if(gcap.fWantPreview) // we were previewing
StartPreview();
}
}
// let them set a capture time limit
//
void ChooseTimeLimit()
{
DoDialog(ghwndApp, IDD_TimeLimitDialog, (DLGPROC)TimeLimitProc, 0);
}
// choose an audio capture format using ACM
//
void ChooseAudioFormat()
{
ACMFORMATCHOOSE cfmt;
DWORD dwSize;
LPWAVEFORMATEX lpwfx;
AM_MEDIA_TYPE *pmt;
// there's no point if we can't set a new format
if(gcap.pASC == NULL)
return;
// What's the largest format size around?
acmMetrics(NULL, ACM_METRIC_MAX_SIZE_FORMAT, &dwSize);
HRESULT hr = gcap.pASC->GetFormat(&pmt);
if(hr != NOERROR)
return;
lpwfx = (LPWAVEFORMATEX)pmt->pbFormat;
dwSize = (DWORD) (max(dwSize, lpwfx->cbSize + sizeof(WAVEFORMATEX)));
// !!! This doesn't really map to the supported formats of the filter.
// We should be using a property page based on IAMStreamConfig
// Put up a dialog box initialized with the current format
lpwfx = (LPWAVEFORMATEX)GlobalAllocPtr(GHND, dwSize);
if(lpwfx)
{
CopyMemory(lpwfx, pmt->pbFormat, pmt->cbFormat);
_fmemset(&cfmt, 0, sizeof(ACMFORMATCHOOSE));
cfmt.cbStruct = sizeof(ACMFORMATCHOOSE);
cfmt.fdwStyle = ACMFORMATCHOOSE_STYLEF_INITTOWFXSTRUCT;
// show only formats we can capture
cfmt.fdwEnum = ACM_FORMATENUMF_HARDWARE | ACM_FORMATENUMF_INPUT;
cfmt.hwndOwner = ghwndApp;
cfmt.pwfx = lpwfx;
cfmt.cbwfx = dwSize;
// we chose a new format... so give it to the capture filter
if(!acmFormatChoose(&cfmt))
{
if(gcap.fPreviewing)
StopPreview(); // can't call IAMStreamConfig::SetFormat
// while streaming
hr = SetMediaTypeFormatBlock(pmt, (LPBYTE)lpwfx, lpwfx->cbSize + sizeof(WAVEFORMATEX));
ASSERT(SUCCEEDED(hr));
gcap.pASC->SetFormat(pmt); // filter will reconnect
if(gcap.fWantPreview)
StartPreview();
}
GlobalFreePtr(lpwfx) ;
}
DeleteMediaType(pmt);
}
/*----------------------------------------------------------------------------*\
| AppCommand()
|
| Process all of our WM_COMMAND messages.
\*----------------------------------------------------------------------------*/
LONG PASCAL AppCommand(HWND hwnd, unsigned msg, WPARAM wParam, LPARAM lParam)
{
HRESULT hr;
int id = GET_WM_COMMAND_ID(wParam, lParam);
switch(id)
{
// Our about box
//
case MENU_ABOUT:
DialogBox(ghInstApp, MAKEINTRESOURCE(IDD_ABOUT), hwnd,
(DLGPROC)AboutDlgProc);
break;
// Exit the application
//
case MENU_EXIT:
PostMessage(hwnd,WM_CLOSE,0,0L);
break;
// choose a capture file
//
case MENU_SET_CAP_FILE:
SetCaptureFile(hwnd);
break;
// pre-allocate the capture file
//
case MENU_ALLOC_CAP_FILE:
AllocCaptureFile(hwnd);
break;
// save the capture file
//
case MENU_SAVE_CAP_FILE:
SaveCaptureFile(hwnd);
break;
// start capturing
//
case MENU_START_CAP:
if(gcap.fPreviewing)
StopPreview();
if(gcap.fPreviewGraphBuilt)
TearDownGraph();
BuildCaptureGraph();
StartCapture();
break;
case MENU_MPEG2:
if(gcap.fPreviewing)
StopPreview();
gcap.fMPEG2 = !gcap.fMPEG2;
//
// when we capture we'll need a different graph now
//
if(gcap.fCaptureGraphBuilt || gcap.fPreviewGraphBuilt)
{
TearDownGraph();
}
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
break;
// toggle preview
//
case MENU_PREVIEW:
gcap.fWantPreview = !gcap.fWantPreview;
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
else
StopPreview();
break;
// stop capture
//
case MENU_STOP_CAP:
StopCapture();
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
break;
// select the master stream
//
case MENU_NOMASTER:
gcap.iMasterStream = -1;
if(gcap.pConfigAviMux)
{
hr = gcap.pConfigAviMux->SetMasterStream(gcap.iMasterStream);
if(hr != NOERROR)
ErrMsg(TEXT("SetMasterStream failed!"));
}
break;
case MENU_AUDIOMASTER:
gcap.iMasterStream = 1;
if(gcap.pConfigAviMux)
{
hr = gcap.pConfigAviMux->SetMasterStream(gcap.iMasterStream);
if(hr != NOERROR)
ErrMsg(TEXT("SetMasterStream failed!"));
}
break;
case MENU_VIDEOMASTER:
gcap.iMasterStream = 0;
if(gcap.pConfigAviMux)
{
hr = gcap.pConfigAviMux->SetMasterStream(gcap.iMasterStream);
if(hr != NOERROR)
ErrMsg(TEXT("SetMasterStream failed!"));
}
break;
// toggle capturing audio
case MENU_CAP_AUDIO:
if(gcap.fPreviewing)
StopPreview();
gcap.fCapAudio = !gcap.fCapAudio;
// when we capture we'll need a different graph now
if(gcap.fCaptureGraphBuilt || gcap.fPreviewGraphBuilt)
TearDownGraph();
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
break;
// toggle closed captioning
case MENU_CAP_CC:
if(gcap.fPreviewing)
StopPreview();
gcap.fCapCC = !gcap.fCapCC;
// when we capture we'll need a different graph now
if(gcap.fCaptureGraphBuilt || gcap.fPreviewGraphBuilt)
TearDownGraph();
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
break;
// choose the audio capture format
//
case MENU_AUDIOFORMAT:
ChooseAudioFormat();
break;
// pick a frame rate
//
case MENU_FRAMERATE:
ChooseFrameRate();
break;
// pick a time limit
//
case MENU_TIMELIMIT:
ChooseTimeLimit();
break;
// pick which video capture device to use
// pick which video capture device to use
//
case MENU_VDEVICE0:
case MENU_VDEVICE1:
case MENU_VDEVICE2:
case MENU_VDEVICE3:
case MENU_VDEVICE4:
case MENU_VDEVICE5:
case MENU_VDEVICE6:
case MENU_VDEVICE7:
case MENU_VDEVICE8:
case MENU_VDEVICE9:
ChooseDevices(gcap.rgpmVideoMenu[id - MENU_VDEVICE0], gcap.pmAudio);
break;
// pick which audio capture device to use
//
case MENU_ADEVICE0:
case MENU_ADEVICE1:
case MENU_ADEVICE2:
case MENU_ADEVICE3:
case MENU_ADEVICE4:
case MENU_ADEVICE5:
case MENU_ADEVICE6:
case MENU_ADEVICE7:
case MENU_ADEVICE8:
case MENU_ADEVICE9:
ChooseDevices(gcap.pmVideo, gcap.rgpmAudioMenu[id - MENU_ADEVICE0]);
break;
// video format dialog
//
case MENU_DIALOG0:
case MENU_DIALOG1:
case MENU_DIALOG2:
case MENU_DIALOG3:
case MENU_DIALOG4:
case MENU_DIALOG5:
case MENU_DIALOG6:
case MENU_DIALOG7:
case MENU_DIALOG8:
case MENU_DIALOG9:
case MENU_DIALOGA:
case MENU_DIALOGB:
case MENU_DIALOGC:
case MENU_DIALOGD:
case MENU_DIALOGE:
case MENU_DIALOGF:
// they want the VfW format dialog
if(id - MENU_DIALOG0 == gcap.iFormatDialogPos)
{
// this dialog will not work while previewing
if(gcap.fWantPreview)
StopPreview();
HRESULT hrD;
hrD = gcap.pDlg->ShowDialog(VfwCaptureDialog_Format, ghwndApp);
// Sometimes bringing up the FORMAT dialog can result
// in changing to a capture format that the current graph
// can't handle. It looks like that has happened and we'll
// have to rebuild the graph.
if(hrD == VFW_E_CANNOT_CONNECT)
{
TearDownGraph(); // now we need to rebuild
// !!! This won't work if we've left a stranded h/w codec
}
// Resize our window to be the same size that we're capturing
if(gcap.pVSC)
{
AM_MEDIA_TYPE *pmt;
// get format being used NOW
hr = gcap.pVSC->GetFormat(&pmt);
// DV capture does not use a VIDEOINFOHEADER
if(hr == NOERROR)
{
if(pmt->formattype == FORMAT_VideoInfo)
{
// resize our window to the new capture size
ResizeWindow(HEADER(pmt->pbFormat)->biWidth,
abs(HEADER(pmt->pbFormat)->biHeight));
}
DeleteMediaType(pmt);
}
}
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
}
else if(id - MENU_DIALOG0 == gcap.iSourceDialogPos)
{
// this dialog will not work while previewing
if(gcap.fWantPreview)
StopPreview();
gcap.pDlg->ShowDialog(VfwCaptureDialog_Source, ghwndApp);
if(gcap.fWantPreview)
StartPreview();
}
else if(id - MENU_DIALOG0 == gcap.iDisplayDialogPos)
{
// this dialog will not work while previewing
if(gcap.fWantPreview)
StopPreview();
gcap.pDlg->ShowDialog(VfwCaptureDialog_Display, ghwndApp);
if(gcap.fWantPreview)
StartPreview();
// now the code for the new dialogs
}
else if(id - MENU_DIALOG0 == gcap.iVCapDialogPos)
{
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = gcap.pVCap->QueryInterface(IID_ISpecifyPropertyPages,
(void **)&pSpec);
if(hr == S_OK)
{
hr = pSpec->GetPages(&cauuid);
hr = OleCreatePropertyFrame(ghwndApp, 30, 30, NULL, 1,
(IUnknown **)&gcap.pVCap, cauuid.cElems,
(GUID *)cauuid.pElems, 0, 0, NULL);
CoTaskMemFree(cauuid.pElems);
pSpec->Release();
}
}
else if(id - MENU_DIALOG0 == gcap.iVCapCapturePinDialogPos)
{
// You can change this pin's output format in these dialogs.
// If the capture pin is already connected to somebody who's
// fussy about the connection type, that may prevent using
// this dialog(!) because the filter it's connected to might not
// allow reconnecting to a new format. (EG: you switch from RGB
// to some compressed type, and need to pull in a decoder)
// I need to tear down the graph downstream of the
// capture filter before bringing up these dialogs.
// In any case, the graph must be STOPPED when calling them.
if(gcap.fWantPreview)
StopPreview(); // make sure graph is stopped
// The capture pin that we are trying to set the format on is connected if
// one of these variable is set to TRUE. The pin should be disconnected for
// the dialog to work properly.
if(gcap.fCaptureGraphBuilt || gcap.fPreviewGraphBuilt)
{
TearDownGraph(); // graph could prevent dialog working
}
IAMStreamConfig *pSC;
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMStreamConfig, (void **)&pSC);
if(hr != NOERROR)
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMStreamConfig, (void **)&pSC);
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = pSC->QueryInterface(IID_ISpecifyPropertyPages,
(void **)&pSpec);
if(hr == S_OK)
{
hr = pSpec->GetPages(&cauuid);
hr = OleCreatePropertyFrame(ghwndApp, 30, 30, NULL, 1,
(IUnknown **)&pSC, cauuid.cElems,
(GUID *)cauuid.pElems, 0, 0, NULL);
// !!! What if changing output formats couldn't reconnect
// and the graph is broken? Shouldn't be possible...
if(gcap.pVSC)
{
AM_MEDIA_TYPE *pmt;
// get format being used NOW
hr = gcap.pVSC->GetFormat(&pmt);
// DV capture does not use a VIDEOINFOHEADER
if(hr == NOERROR)
{
if(pmt->formattype == FORMAT_VideoInfo)
{
// resize our window to the new capture size
ResizeWindow(HEADER(pmt->pbFormat)->biWidth,
abs(HEADER(pmt->pbFormat)->biHeight));
}
DeleteMediaType(pmt);
}
}
CoTaskMemFree(cauuid.pElems);
pSpec->Release();
}
pSC->Release();
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
}
else if(id - MENU_DIALOG0 == gcap.iVCapPreviewPinDialogPos)
{
// this dialog may not work if the preview pin is connected
// already, because the downstream filter may reject a format
// change, so we better kill the graph. (EG: We switch from
// capturing RGB to some compressed fmt, and need to pull in
// a decompressor)
if(gcap.fWantPreview)
{
StopPreview();
TearDownGraph();
}
IAMStreamConfig *pSC;
// This dialog changes the preview format, so it might affect
// the format being drawn. Our app's window size is taken
// from the size of the capture pin's video, not the preview
// pin, so changing that here won't have any effect. All in all,
// this probably won't be a terribly useful dialog in this app.
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_PREVIEW,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMStreamConfig, (void **)&pSC);
if (hr != NOERROR)
{
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_PREVIEW,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMStreamConfig, (void **)&pSC);
}
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = pSC->QueryInterface(IID_ISpecifyPropertyPages,
(void **)&pSpec);
if(hr == S_OK)
{
hr = pSpec->GetPages(&cauuid);
hr = OleCreatePropertyFrame(ghwndApp, 30, 30, NULL, 1,
(IUnknown **)&pSC, cauuid.cElems,
(GUID *)cauuid.pElems, 0, 0, NULL);
CoTaskMemFree(cauuid.pElems);
pSpec->Release();
}
pSC->Release();
if(gcap.fWantPreview)
{
BuildPreviewGraph();
StartPreview();
}
}
else if(id - MENU_DIALOG0 == gcap.iVCrossbarDialogPos)
{
IAMCrossbar *pX;
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMCrossbar, (void **)&pX);
if(hr != NOERROR)
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMCrossbar, (void **)&pX);
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = pX->QueryInterface(IID_ISpecifyPropertyPages,
(void **)&pSpec);
if(hr == S_OK)
{
hr = pSpec->GetPages(&cauuid);
hr = OleCreatePropertyFrame(ghwndApp, 30, 30, NULL, 1,
(IUnknown **)&pX, cauuid.cElems,
(GUID *)cauuid.pElems, 0, 0, NULL);
CoTaskMemFree(cauuid.pElems);
pSpec->Release();
}
pX->Release();
}
else if(id - MENU_DIALOG0 == gcap.iTVTunerDialogPos)
{
IAMTVTuner *pTV;
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMTVTuner, (void **)&pTV);
if(hr != NOERROR)
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMTVTuner, (void **)&pTV);
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = pTV->QueryInterface(IID_ISpecifyPropertyPages,
(void **)&pSpec);
if(hr == S_OK)
{
hr = pSpec->GetPages(&cauuid);
hr = OleCreatePropertyFrame(ghwndApp, 30, 30, NULL, 1,
(IUnknown **)&pTV, cauuid.cElems,
(GUID *)cauuid.pElems, 0, 0, NULL);
CoTaskMemFree(cauuid.pElems);
pSpec->Release();
}
pTV->Release();
}
else if(id - MENU_DIALOG0 == gcap.iACapDialogPos)
{
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = gcap.pACap->QueryInterface(IID_ISpecifyPropertyPages,
(void **)&pSpec);
if(hr == S_OK)
{
hr = pSpec->GetPages(&cauuid);
hr = OleCreatePropertyFrame(ghwndApp, 30, 30, NULL, 1,
(IUnknown **)&gcap.pACap, cauuid.cElems,
(GUID *)cauuid.pElems, 0, 0, NULL);
CoTaskMemFree(cauuid.pElems);
pSpec->Release();
}
}
else if(id - MENU_DIALOG0 == gcap.iACapCapturePinDialogPos)
{
// this dialog will not work while previewing - it might change
// the output format!
if(gcap.fWantPreview)
StopPreview();
IAMStreamConfig *pSC;
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Audio, gcap.pACap,
IID_IAMStreamConfig, (void **)&pSC);
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = pSC->QueryInterface(IID_ISpecifyPropertyPages,
(void **)&pSpec);
if(hr == S_OK)
{
hr = pSpec->GetPages(&cauuid);
hr = OleCreatePropertyFrame(ghwndApp, 30, 30, NULL, 1,
(IUnknown **)&pSC, cauuid.cElems,
(GUID *)cauuid.pElems, 0, 0, NULL);
CoTaskMemFree(cauuid.pElems);
pSpec->Release();
}
pSC->Release();
if(gcap.fWantPreview)
StartPreview();
}
else if(id - MENU_DIALOG0 == gcap.iACrossbarDialogPos)
{
IAMCrossbar *pX, *pX2;
IBaseFilter *pXF;
// we could use better error checking here... I'm assuming
// this won't fail
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, gcap.pVCap,
IID_IAMCrossbar, (void **)&pX);
if(hr != NOERROR)
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, gcap.pVCap,
IID_IAMCrossbar, (void **)&pX);
hr = pX->QueryInterface(IID_IBaseFilter, (void **)&pXF);
hr = gcap.pBuilder->FindInterface(&LOOK_UPSTREAM_ONLY, NULL,
pXF, IID_IAMCrossbar, (void **)&pX2);
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = pX2->QueryInterface(IID_ISpecifyPropertyPages,
(void **)&pSpec);
if(hr == S_OK)
{
hr = pSpec->GetPages(&cauuid);
hr = OleCreatePropertyFrame(ghwndApp, 30, 30, NULL, 1,
(IUnknown **)&pX2, cauuid.cElems,
(GUID *)cauuid.pElems, 0, 0, NULL);
CoTaskMemFree(cauuid.pElems);
pSpec->Release();
}
pX2->Release();
pXF->Release();
pX->Release();
}
else if(id - MENU_DIALOG0 == gcap.iTVAudioDialogPos)
{
IAMTVAudio *pTVA;
hr = gcap.pBuilder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Audio, gcap.pACap,
IID_IAMTVAudio, (void **)&pTVA);
ISpecifyPropertyPages *pSpec;
CAUUID cauuid;
hr = pTVA->QueryInterface(IID_ISpecifyPropertyPages,
(void **)&pSpec);
if(hr == S_OK)
{
hr = pSpec->GetPages(&cauuid);
hr = OleCreatePropertyFrame(ghwndApp, 30, 30, NULL, 1,
(IUnknown **)&pTVA, cauuid.cElems,
(GUID *)cauuid.pElems, 0, 0, NULL);
CoTaskMemFree(cauuid.pElems);
pSpec->Release();
}
pTVA->Release();
}
else if(((id - MENU_DIALOG0) > gcap.iVideoInputMenuPos) &&
(id - MENU_DIALOG0) <= gcap.iVideoInputMenuPos + gcap.NumberOfVideoInputs)
{
// Remove existing checks
for(int j = 0; j < gcap.NumberOfVideoInputs; j++)
{
CheckMenuItem(gcap.hMenuPopup, j, MF_BYPOSITION |
((j == (id - MENU_DIALOG0) - gcap.iVideoInputMenuPos - 1) ?
MF_CHECKED : MF_UNCHECKED ));
}
if(gcap.pCrossbar)
{
hr = gcap.pCrossbar->SetInputIndex((id - MENU_DIALOG0) - gcap.iVideoInputMenuPos - 1);
ASSERT(hr == S_OK);
}
}
break;
}
return 0L;
}
/*----------------------------------------------------------------------------*\
| ErrMsg - Opens a Message box with a error message in it. The user can |
| select the OK button to continue |
\*----------------------------------------------------------------------------*/
void ErrMsg(LPTSTR szFormat,...)
{
static TCHAR szBuffer[2048]={0};
const size_t NUMCHARS = sizeof(szBuffer) / sizeof(szBuffer[0]);
const int LASTCHAR = NUMCHARS - 1;
// Format the input string
va_list pArgs;
va_start(pArgs, szFormat);
// Use a bounded buffer size to prevent buffer overruns. Limit count to
// character size minus one to allow for a NULL terminating character.
HRESULT hr = StringCchVPrintf(szBuffer, NUMCHARS - 1, szFormat, pArgs);
va_end(pArgs);
// Ensure that the formatted string is NULL-terminated
szBuffer[LASTCHAR] = TEXT('\0');
MessageBox(ghwndApp, szBuffer, NULL,
MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL);
}
/* AboutDlgProc()
*
* Dialog Procedure for the "about" dialog box.
*
*/
BOOL CALLBACK AboutDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_COMMAND:
EndDialog(hwnd, TRUE);
return TRUE;
case WM_INITDIALOG:
return TRUE;
}
return FALSE;
}
// pre-allocate the capture file
//
BOOL AllocCaptureFile(HWND hWnd)
{
// we'll get into an infinite loop in the dlg proc setting a value
if(gcap.wszCaptureFile[0] == 0)
return FALSE;
/*
* show the allocate file space dialog to encourage
* the user to pre-allocate space
*/
if(DoDialog(hWnd, IDD_AllocCapFileSpace, (DLGPROC)AllocCapFileProc, 0))
{
// ensure repaint after dismissing dialog before
// possibly lengthy operation
UpdateWindow(ghwndApp);
// User has hit OK. Alloc requested capture file space
BOOL f = MakeBuilder();
if(!f)
return FALSE;
if(gcap.pBuilder->AllocCapFile(gcap.wszCaptureFile,
(DWORDLONG)gcap.wCapFileSize * 1024L * 1024L) != NOERROR)
{
MessageBox(ghwndApp, TEXT("Error"),
TEXT("Failed to pre-allocate capture file space"),
MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}
return TRUE;
}
else
{
return FALSE;
}
}
/*
* Put up the open file dialog
*/
BOOL OpenFileDialog(HWND hWnd, LPTSTR pszName, DWORD cchName)
{
OPENFILENAME ofn;
LPTSTR p;
TCHAR szFileName[_MAX_PATH];
TCHAR szBuffer[_MAX_PATH] ;
if(pszName == NULL)
{
return FALSE;
}
// start with capture file as current file name
szFileName[0] = 0;
(void)StringCchCopy(szFileName, NUMELMS(szFileName), gcap.wszCaptureFile);
// Get just the path info
// Terminate the full path at the last backslash
(void)StringCchCopy(szBuffer, NUMELMS(szBuffer), szFileName);
for(p = szBuffer + lstrlen(szBuffer); p > szBuffer; p--)
{
if(*p == '\\')
{
*(p+1) = '\0';
break;
}
}
szBuffer[_MAX_PATH-1] = 0; // Null-terminate
ZeroMemory(&ofn, sizeof(OPENFILENAME)) ;
ofn.lStructSize = sizeof(OPENFILENAME) ;
ofn.hwndOwner = hWnd ;
ofn.lpstrFilter = TEXT("Microsoft AVI\0*.avi\0\0");
ofn.nFilterIndex = 0 ;
ofn.lpstrFile = szFileName;
ofn.nMaxFile = sizeof(szFileName) ;
ofn.lpstrFileTitle = NULL;
ofn.lpstrTitle = TEXT("Set Capture File");
ofn.nMaxFileTitle = 0 ;
ofn.lpstrInitialDir = szBuffer;
ofn.Flags = OFN_HIDEREADONLY | OFN_NOREADONLYRETURN | OFN_PATHMUSTEXIST ;
if(GetOpenFileName(&ofn))
{
// We have a capture file name
StringCchCopy(pszName, cchName, szFileName);
return TRUE;
}
else
{
return FALSE;
}
}
/*
* Put up a dialog to allow the user to select a capture file.
*/
BOOL SetCaptureFile(HWND hWnd)
{
if(OpenFileDialog(hWnd, gcap.wszCaptureFile, _MAX_PATH))
{
// We have a capture file name
// If this is a new file, then invite the user to
// allocate some space
if (GetFileAttributes(gcap.wszCaptureFile) == INVALID_FILE_ATTRIBUTES)
{
// bring up dialog, and set new file size
BOOL f = AllocCaptureFile(hWnd);
if(!f)
return FALSE;
}
}
else
{
return FALSE;
}
SetAppCaption();
// tell the file writer to use the new filename
if(gcap.pSink)
{
gcap.pSink->SetFileName(gcap.wszCaptureFile, NULL);
}
return TRUE;
}
/*
* Put up a dialog to allow the user to save the contents of the capture file
* elsewhere
*/
BOOL SaveCaptureFile(HWND hWnd)
{
HRESULT hr;
TCHAR tachDstFile[_MAX_PATH];
if(gcap.pBuilder == NULL)
return FALSE;
if(OpenFileDialog(hWnd, tachDstFile, _MAX_PATH))
{
// We have a capture file name
statusUpdateStatus(ghwndStatus, TEXT("Saving capture file - please wait..."));
// we need our own graph builder because the main one might not exist
ICaptureGraphBuilder2 *pBuilder;
hr = CoCreateInstance((REFCLSID)CLSID_CaptureGraphBuilder2,
NULL, CLSCTX_INPROC, (REFIID)IID_ICaptureGraphBuilder2,
(void **)&pBuilder);
if(hr == NOERROR)
{
// allow the user to press ESC to abort... ask for progress
CProgress *pProg = new CProgress();
IAMCopyCaptureFileProgress *pIProg = NULL;
if(pProg)
{
hr = pProg->QueryInterface(IID_IAMCopyCaptureFileProgress,
(void **)&pIProg);
}
hr = pBuilder->CopyCaptureFile(gcap.wszCaptureFile,
tachDstFile, TRUE, pIProg);
if(pIProg)
pIProg->Release();
pBuilder->Release();
}
if(hr == S_OK)
statusUpdateStatus(ghwndStatus, TEXT("Capture file saved"));
else if(hr == S_FALSE)
statusUpdateStatus(ghwndStatus, TEXT("Capture file save aborted"));
else
statusUpdateStatus(ghwndStatus, TEXT("Capture file save ERROR"));
return (hr == NOERROR ? TRUE : FALSE);
}
else
{
return TRUE; // they cancelled or something
}
}
// Display a dialog box
//
int DoDialog(HWND hwndParent, int DialogID, DLGPROC fnDialog, long lParam)
{
DLGPROC fn;
int result;
fn = (DLGPROC)MakeProcInstance(fnDialog, ghInstApp);
result = (int) DialogBoxParam(ghInstApp,
MAKEINTRESOURCE(DialogID),
hwndParent,
fn,
lParam);
FreeProcInstance(fn);
return result;
}
//
// This function can be used when loading libraries in the Windows System
// folder. It queries for the system folder and prepends the path to the
// name of the target library. This helps to prevent spoofing of system DLLs.
//
// NOTE: Using this function may break apps who use Windows Fusion or who
// explicitly replace Windows DLLs in the application's local folder.
// If security is paramount, you can use this as a replacement for LoadLibrary().
//
HMODULE UtilLoadLibrary(LPCTSTR lpFileName)
{
TCHAR szFullPath[MAX_PATH];
BOOL fSuccess = FALSE;
size_t nLibLength = 0;
if (lpFileName == NULL)
{
return NULL;
}
// Prevent buffer overflow by limiting size of library name
if (FAILED(StringCchLength(lpFileName, MAX_PATH, &nLibLength)))
{
return NULL;
}
// nLibLength does not include the terminating NULL, so it must be strictly less than MAX_PATH
if(nLibLength >= MAX_PATH)
{
return NULL;
}
int nSpaceAllowed = (int)(MAX_PATH - nLibLength - 4); // Allow for '\' and '\0'
int nSpaceUsed = 0;
// Initialize to a NULL string
szFullPath[0] = TEXT('\0');
// Read the Windows System directory
nSpaceUsed = GetSystemDirectory(szFullPath, nSpaceAllowed);
// If the function fails, the return value will be zero.
// If the buffer isn't large enough, the function will return the size
// of the buffer required to hold the path. Check both failures.
if((nSpaceUsed != 0) && (nSpaceUsed <= nSpaceAllowed))
{
// Now we have the Windows/System path with enough space left
// to add the libary name and a terminating NULL character
HRESULT hr = StringCchCat(szFullPath, MAX_PATH, TEXT("\\\0"));
hr = StringCchCat(szFullPath, MAX_PATH, lpFileName);
hr = StringCchCat(szFullPath, MAX_PATH, TEXT("\0"));
fSuccess = TRUE;
}
if(!fSuccess)
{
// An error occurred, so fallback to the default behavior by using
// the NULL-terminated library name provided as a parameter.
StringCchCopy(szFullPath, MAX_PATH, lpFileName);
// Must succeed because lpFileName < MAX_PATH
}
return ((HMODULE) LoadLibrary(szFullPath));
}
//
// GetFreeDiskSpace: Function to Measure Available Disk Space
//
static long GetFreeDiskSpaceInKB(LPTSTR pFile)
{
DWORD dwFreeClusters, dwBytesPerSector, dwSectorsPerCluster, dwClusters;
TCHAR RootName[MAX_PATH];
LPTSTR ptmp=0; //required arg
ULARGE_INTEGER ulA, ulB, ulFreeBytes;
// need to find path for root directory on drive containing this file.
if (0 == GetFullPathName(pFile, NUMELMS(RootName), RootName, &ptmp))
{
return -1;
}
// truncate this to the name of the root directory (how tedious)
if(RootName[0] == '\\' && RootName[1] == '\\')
{
// path begins with \\server\share\path so skip the first
// three backslashes
ptmp = &RootName[2];
while(*ptmp && (*ptmp != '\\'))
{
ptmp++;
}
if(*ptmp)
{
// advance past the third backslash
ptmp++;
}
}
else
{
// path must be drv:\path
ptmp = RootName;
}
// find next backslash and put a null after it
while(*ptmp && (*ptmp != '\\'))
{
ptmp++;
}
// found a backslash ?
if(*ptmp)
{
// skip it and insert null
ptmp++;
*ptmp = '\0';
}
// the only real way of finding out free disk space is calling
// GetDiskFreeSpaceExA, but it doesn't exist on Win95
HINSTANCE h = LoadLibrary(TEXT("kernel32.dll\0"));
if(h)
{
typedef BOOL(WINAPI *MyFunc)(LPCTSTR RootName, PULARGE_INTEGER pulA, PULARGE_INTEGER pulB, PULARGE_INTEGER pulFreeBytes);
MyFunc pfnGetDiskFreeSpaceEx = (MyFunc)GetProcAddress(h, "GetDiskFreeSpaceExW");
FreeLibrary(h);
if(pfnGetDiskFreeSpaceEx)
{
if(!pfnGetDiskFreeSpaceEx(RootName, &ulA, &ulB, &ulFreeBytes))
return -1;
else
return (long)(ulFreeBytes.QuadPart / 1024);
}
}
if(!GetDiskFreeSpace(RootName, &dwSectorsPerCluster, &dwBytesPerSector,
&dwFreeClusters, &dwClusters))
return (-1);
else
return(MulDiv(dwSectorsPerCluster * dwBytesPerSector, dwFreeClusters, 1024));
}
// AllocCapFileProc: Capture file Space Allocation Dialog Box Procedure
//
int FAR PASCAL AllocCapFileProc(HWND hDlg, UINT Message, UINT wParam, LONG lParam)
{
static int nFreeMBs = 0 ;
switch(Message)
{
case WM_INITDIALOG:
{
DWORDLONG dwlFileSize = 0;
long lFreeSpaceInKB;
// Get current capture file name and measure its size
dwlFileSize = GetSize(gcap.wszCaptureFile);
// Get free disk space and add current capture file size to that.
// Convert the available space to MBs.
if((lFreeSpaceInKB = GetFreeDiskSpaceInKB(gcap.wszCaptureFile)) != -1L)
{
lFreeSpaceInKB += (long)(dwlFileSize / 1024);
nFreeMBs = lFreeSpaceInKB / 1024 ;
SetDlgItemInt(hDlg, IDD_SetCapFileFree, nFreeMBs, TRUE) ;
}
else
{
EnableWindow(GetDlgItem(hDlg, IDD_SetCapFileFree), FALSE);
}
gcap.wCapFileSize = (WORD) (dwlFileSize / (1024L * 1024L));
SetDlgItemInt(hDlg, IDD_SetCapFileSize, gcap.wCapFileSize, TRUE) ;
return TRUE ;
}
case WM_COMMAND :
switch(GET_WM_COMMAND_ID(wParam, lParam))
{
case IDOK :
{
int iCapFileSize ;
iCapFileSize = (int) GetDlgItemInt(hDlg, IDD_SetCapFileSize, NULL, TRUE) ;
if(iCapFileSize <= 0 || iCapFileSize > nFreeMBs)
{
// You are asking for more than we have !! Sorry, ...
SetDlgItemInt(hDlg, IDD_SetCapFileSize, iCapFileSize, TRUE) ;
SetFocus(GetDlgItem(hDlg, IDD_SetCapFileSize)) ;
MessageBeep(MB_ICONEXCLAMATION) ;
return FALSE ;
}
gcap.wCapFileSize = (WORD)iCapFileSize ;
EndDialog(hDlg, TRUE) ;
return TRUE ;
}
case IDCANCEL :
EndDialog(hDlg, FALSE) ;
return TRUE ;
case IDD_SetCapFileSize:
{
long l;
BOOL bchanged;
TCHAR tachBuffer[21];
// check that entered size is a valid number
GetDlgItemText(hDlg, IDD_SetCapFileSize, tachBuffer,
sizeof(tachBuffer)/sizeof(tachBuffer[0]));
l = _wtol(tachBuffer);
bchanged = FALSE;
if(l < 1)
{
l = 1;
bchanged = TRUE;
// don't infinite loop if there's < 1 Meg free
}
else if(l > nFreeMBs && nFreeMBs > 0)
{
l = nFreeMBs;
bchanged = TRUE;
}
else
{
// make sure there are no non-digit chars
// atol() will ignore trailing non-digit characters
int c = 0;
while(tachBuffer[c])
{
if(IsCharAlpha(tachBuffer[c]) ||
!IsCharAlphaNumeric(tachBuffer[c]))
{
// string contains non-digit chars - reset
l = 1;
bchanged = TRUE;
break;
}
c++;
}
}
if(bchanged)
{
HRESULT hr = StringCchPrintf(tachBuffer, 21, TEXT("%ld\0"), l);
SetDlgItemText(hDlg, IDD_SetCapFileSize, tachBuffer);
}
break;
}
}
break;
}
return FALSE ;
}
//
// FrameRateProc: Choose a frame rate
//
int FAR PASCAL FrameRateProc(HWND hwnd, UINT msg, UINT wParam, LONG lParam)
{
TCHAR tach[32];
HRESULT hr;
switch(msg)
{
case WM_INITDIALOG:
/* put the current frame rate in the box */
hr = StringCchPrintf(tach, 32, TEXT("%d\0"), (int) gcap.FrameRate);
SetDlgItemText(hwnd, IDC_FRAMERATE, tach);
CheckDlgButton(hwnd, IDC_USEFRAMERATE, gcap.fUseFrameRate);
break;
case WM_COMMAND:
switch(wParam)
{
case IDCANCEL:
EndDialog(hwnd, FALSE);
break;
case IDOK:
/* get the new frame rate */
GetDlgItemText(hwnd, IDC_FRAMERATE, tach, sizeof(tach)/sizeof(tach[0]));
double frameRate = _wtof(tach);
if(frameRate <= 0.)
{
ErrMsg(TEXT("Invalid frame rate."));
break;
}
else
gcap.FrameRate = frameRate;
gcap.fUseFrameRate = IsDlgButtonChecked(hwnd, IDC_USEFRAMERATE);
EndDialog(hwnd, TRUE);
break;
}
break;
default:
return FALSE;
}
return TRUE;
}
//
// TimeLimitProc: Choose a capture time limit
//
int FAR PASCAL TimeLimitProc(HWND hwnd, UINT msg, UINT wParam, LONG lParam)
{
TCHAR tach[32];
DWORD dwTimeLimit;
HRESULT hr;
switch(msg)
{
case WM_INITDIALOG:
/* put the current time limit info in the boxes */
hr = StringCchPrintf(tach, 32, TEXT("%d\0"), gcap.dwTimeLimit);
SetDlgItemText(hwnd, IDC_TIMELIMIT, tach);
CheckDlgButton(hwnd, IDC_USETIMELIMIT, gcap.fUseTimeLimit);
break;
case WM_COMMAND:
switch(wParam)
{
case IDCANCEL:
EndDialog(hwnd, FALSE);
break;
case IDOK:
/* get the new time limit */
dwTimeLimit = GetDlgItemInt(hwnd, IDC_TIMELIMIT, NULL, FALSE);
gcap.dwTimeLimit = dwTimeLimit;
gcap.fUseTimeLimit = IsDlgButtonChecked(hwnd, IDC_USETIMELIMIT);
EndDialog(hwnd, TRUE);
break;
}
break;
default:
return FALSE;
}
return TRUE;
}
//
// PressAKeyProc: Press OK to capture
//
int FAR PASCAL PressAKeyProc(HWND hwnd, UINT msg, UINT wParam, LONG lParam)
{
TCHAR tach[_MAX_PATH];
HRESULT hr;
switch(msg)
{
case WM_INITDIALOG:
/* set the current file name in the box */
hr = StringCchPrintf(tach, _MAX_PATH, TEXT("%s\0"), gcap.wszCaptureFile);
SetDlgItemText(hwnd, IDC_CAPFILENAME, tach);
break;
case WM_COMMAND:
switch(wParam)
{
case IDCANCEL:
EndDialog(hwnd, FALSE);
break;
case IDOK:
EndDialog(hwnd, TRUE);
break;
}
break;
default:
return FALSE;
}
return TRUE;
}
DWORDLONG GetSize(LPCTSTR tach)
{
HANDLE hFile = CreateFile(tach, GENERIC_READ, FILE_SHARE_READ, 0,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if(hFile == INVALID_HANDLE_VALUE)
{
return 0;
}
DWORDLONG dwlSize = 0;
DWORD dwSizeHigh = 0;
DWORD dwSizeLow = GetFileSize(hFile, &dwSizeHigh);
if (INVALID_FILE_SIZE != dwSizeLow)
{
dwlSize = dwSizeLow + ((DWORDLONG)dwSizeHigh << 32);
}
if(!CloseHandle(hFile))
{
dwlSize = 0;
}
return dwlSize;
}
void OnClose()
{
TCHAR szBuf[512];
WCHAR *wszDisplayName = NULL;
// Unregister device notifications
if(ghDevNotify != NULL)
{
ASSERT(gpUnregisterDeviceNotification);
gpUnregisterDeviceNotification(ghDevNotify);
ghDevNotify = NULL;
}
// Destroy the filter graph and cleanup
StopPreview();
StopCapture();
TearDownGraph();
FreeCapFilters();
//
// Store current settings in win.ini for next time
//
// Save the name of the current capture file
WriteProfileString(TEXT("annie"), TEXT("CaptureFile"), gcap.wszCaptureFile);
wszDisplayName = 0;
szBuf[0] = NULL;
if(gcap.pmVideo)
{
if(SUCCEEDED(gcap.pmVideo->GetDisplayName(0, 0, &wszDisplayName)))
{
if(wszDisplayName)
{
StringCchCopyN(szBuf, NUMELMS(szBuf), wszDisplayName, NUMELMS(szBuf)-1);
CoTaskMemFree(wszDisplayName);
}
}
}
// Save the current video device string
WriteProfileString(TEXT("annie"), TEXT("VideoDevice2"), szBuf);
wszDisplayName = 0;
szBuf[0] = NULL;
if(gcap.pmAudio)
{
if(SUCCEEDED(gcap.pmAudio->GetDisplayName(0, 0, &wszDisplayName)))
{
if(wszDisplayName)
{
(void)StringCchCopy(szBuf, NUMELMS(szBuf), wszDisplayName );
CoTaskMemFree(wszDisplayName);
}
}
}
// Save the current audio device string
WriteProfileString(TEXT("annie"), TEXT("AudioDevice2"), szBuf);
// Save the integer settings
HRESULT hr = StringCchPrintf(szBuf, 512, TEXT("%d"), (int)(10000000 / gcap.FrameRate));
WriteProfileString(TEXT("annie"), TEXT("FrameRate"), szBuf);
hr = StringCchPrintf(szBuf, 512, TEXT("%d"), gcap.fUseFrameRate);
WriteProfileString(TEXT("annie"), TEXT("UseFrameRate"), szBuf);
hr = StringCchPrintf(szBuf, 512, TEXT("%d"), gcap.fCapAudio);
WriteProfileString(TEXT("annie"), TEXT("CaptureAudio"), szBuf);
hr = StringCchPrintf(szBuf, 512, TEXT("%d"), gcap.fCapCC);
WriteProfileString(TEXT("annie"), TEXT("CaptureCC"), szBuf);
hr = StringCchPrintf(szBuf, 512, TEXT("%d"), gcap.fWantPreview);
WriteProfileString(TEXT("annie"), TEXT("WantPreview"), szBuf);
hr = StringCchPrintf(szBuf, 512, TEXT("%d"), gcap.iMasterStream);
WriteProfileString(TEXT("annie"), TEXT("MasterStream"), szBuf);
hr = StringCchPrintf(szBuf, 512, TEXT("%d"), gcap.fUseTimeLimit);
WriteProfileString(TEXT("annie"), TEXT("UseTimeLimit"), szBuf);
hr = StringCchPrintf(szBuf, 512, TEXT("%d"), gcap.dwTimeLimit);
WriteProfileString(TEXT("annie"), TEXT("TimeLimit"), szBuf);
}
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