cecamera.cpp

这是一个在windows mobile 5下可以录像

    CBR(SetDlgItemText(hwndDlg, IDC_TITLE, CECAMERA_DEFAULT_TITLE));
    CBR(SetDlgItemInt(hwndDlg, IDC_RESOLUTION_WIDTH, CECAMERA_DEFAULT_RESOLUTION_WIDTH, 0));
    CBR(SetDlgItemInt(hwndDlg, IDC_RESOLUTION_HEIGHT, CECAMERA_DEFAULT_RESOLUTION_HEIGHT, 0));
    CBR(SetDlgItemInt(hwndDlg, IDC_VIDEO_TIME_LIMIT, CECAMERA_DEFAULT_VIDEO_TIME_LIMIT, 0));

    // Disable the edit controls since specify using default settings
    EnableWindow(GetDlgItem(hwndDlg, IDC_INITIAL_DIR), FALSE);
    EnableWindow(GetDlgItem(hwndDlg, IDC_DEFAULT_FILE_NAME), FALSE);
    EnableWindow(GetDlgItem(hwndDlg, IDC_TITLE), FALSE);
    EnableWindow(GetDlgItem(hwndDlg, IDC_RESOLUTION_WIDTH), FALSE);
    EnableWindow(GetDlgItem(hwndDlg, IDC_RESOLUTION_HEIGHT), FALSE);
    EnableWindow(GetDlgItem(hwndDlg, IDC_VIDEO_TIME_LIMIT), FALSE);

    // Checks the menu item and makes it a radio item
    CBR(CheckMenuRadioItem(GetSubMenu(g_hMainMenu, 0), IDM_MODE_STILL, IDM_MODE_VIDEOWITHAUDIO, IDM_MODE_STILL, MF_BYCOMMAND));
    CBR(CheckMenuRadioItem(GetSubMenu(g_hMainMenu, 1), IDM_STILLQUALITY_DEFAULT, IDM_STILLQUALITY_HIGH, IDM_STILLQUALITY_DEFAULT, MF_BYCOMMAND));
    CBR(CheckMenuRadioItem(GetSubMenu(g_hMainMenu, 2), IDM_VIDEOTYPES_ALL, IDM_VIDEOTYPES_MESSAGING, IDM_VIDEOTYPES_ALL, MF_BYCOMMAND));

    // Set the global variables as default value
    g_StillQuality = CECAMERA_DEFAULT_STILL_QUALITY;
    g_VideoTypes   = CECAMERA_DEFAULT_VIDEO_TYPES;
    g_Mode         = CECAMERA_DEFAULT_MODE;

Error:
    return;
}

// ***************************************************************************
// Function Name: ChangeMode
//
// Purpose: Changes "Mode" parameter of SHCameraCapture()
//
// Arguments:
//   WORD wMode - The identifier of the menu item
//
// Return Values: none
//
// Description:
//   Changes "Mode" parameter of SHCameraCapture(),
//   also checks the specified menu item of "Mode".

VOID ChangeMode(WORD wMode)
{
    HRESULT hr;

    // Update the menu item "Mode"
    CBR(CheckMenuRadioItem(GetSubMenu(g_hMainMenu, 0), IDM_MODE_STILL, IDM_MODE_VIDEOWITHAUDIO, wMode, MF_BYCOMMAND));

    // Set the global variables as user specified value
    switch (wMode)
    {
        case IDM_MODE_STILL:
            g_Mode = CAMERACAPTURE_MODE_STILL;
            break;
        case IDM_MODE_VIDEOONLY:
            g_Mode = CAMERACAPTURE_MODE_VIDEOONLY;
            break;
        case IDM_MODE_VIDEOWITHAUDIO:
            g_Mode = CAMERACAPTURE_MODE_VIDEOWITHAUDIO;
            break;
        default:
            CBR(FALSE);
            break;
    }

Error:
    return;
}

// ***************************************************************************
// Function Name: ChangeStillQuality
//
// Purpose: Changes "StillQuality" parameter of SHCameraCapture()
//
// Arguments:
//   WORD wStillQuality - The identifier of the menu item
//
// Return Values: none
//
// Description:
//   Changes "StillQuality" parameter of SHCameraCapture(),
//   also checks the specified menu item of "StillQuality".

VOID ChangeStillQuality(WORD wStillQuality)
{
    HRESULT hr;

    // Update the menu item "StillQuality"
    CBR(CheckMenuRadioItem(GetSubMenu(g_hMainMenu, 1), IDM_STILLQUALITY_DEFAULT, IDM_STILLQUALITY_HIGH, wStillQuality, MF_BYCOMMAND));

    // Set the global variables as user specified value
    switch (wStillQuality)
    {
        case IDM_STILLQUALITY_DEFAULT:
            g_StillQuality = CAMERACAPTURE_STILLQUALITY_DEFAULT;
            break;
        case IDM_STILLQUALITY_LOW:
            g_StillQuality = CAMERACAPTURE_STILLQUALITY_LOW;
            break;
        case IDM_STILLQUALITY_NORMAL:
            g_StillQuality = CAMERACAPTURE_STILLQUALITY_NORMAL;
            break;
        case IDM_STILLQUALITY_HIGH:
            g_StillQuality = CAMERACAPTURE_STILLQUALITY_HIGH;
            break;
        default:
            CBR(FALSE);
            break;
    }

Error:
    return;
}

// ***************************************************************************
// Function Name: ChangeVideoTypes
//
// Purpose: Changes "VideoTypes" parameter of SHCameraCapture()
//
// Arguments:
//   WORD wVideoTypes - The identifier of the menu item
//
// Return Values: none
//
// Description:
//   Changes "VideoTypes" parameter of SHCameraCapture(),
//   also checks the specified menu item of "VideoTypes".

VOID ChangeVideoTypes(WORD wVideoTypes)
{
    HRESULT hr;

    // Update the menu item "VideoTypes"
    CBR(CheckMenuRadioItem(GetSubMenu(g_hMainMenu, 2), IDM_VIDEOTYPES_ALL, IDM_VIDEOTYPES_MESSAGING, wVideoTypes, MF_BYCOMMAND));

    // Set the global variables as user specified value
    switch (wVideoTypes)
    {
        case IDM_VIDEOTYPES_ALL:
            g_VideoTypes = CAMERACAPTURE_VIDEOTYPE_ALL;
            break;
        case IDM_VIDEOTYPES_STANDARD:
            g_VideoTypes = CAMERACAPTURE_VIDEOTYPE_STANDARD;
            break;
        case IDM_VIDEOTYPES_MESSAGING:
            g_VideoTypes = CAMERACAPTURE_VIDEOTYPE_MESSAGING;
            break;
        default:
            CBR(FALSE);
            break;
    }

Error:
    return;
}

// ***************************************************************************
// Function Name: ChangeOptions
//
// Purpose: Enable/Disable user input of the edit controls
//
// Arguments:
//   HWND hwndDlg  - Handle to the main dialog
//   WORD wOptions - The identifier of the control
//
// Return Values: none
//
// Description:
//   Enable/Disable user input of the edit controls for allowing/disallowing
//   the user to specify the settings of the Camera API.

VOID ChangeOptions(HWND hwndDlg, WORD wOptions)
{
    HRESULT hr;
    LONG    lCheckState;
    BOOL    bEnable;

    // Get the check state of the check box
    lCheckState = SendDlgItemMessage(hwndDlg, wOptions, BM_GETCHECK, 0, 0);
    bEnable = (BST_UNCHECKED == lCheckState) ? FALSE : TRUE;

    // Enable/Disable user input of the edit controls
    switch (wOptions)
    {
        case IDC_CHECK_INITIAL_DIR:
            EnableWindow(GetDlgItem(hwndDlg, IDC_INITIAL_DIR), bEnable);
            break;
        case IDC_CHECK_DEFAULT_FILE_NAME:
            EnableWindow(GetDlgItem(hwndDlg, IDC_DEFAULT_FILE_NAME), bEnable);
            break;
        case IDC_CHECK_TITLE:
            EnableWindow(GetDlgItem(hwndDlg, IDC_TITLE), bEnable);
            break;
        case IDC_CHECK_RESOLUTION:
            EnableWindow(GetDlgItem(hwndDlg, IDC_RESOLUTION_WIDTH), bEnable);
            EnableWindow(GetDlgItem(hwndDlg, IDC_RESOLUTION_HEIGHT), bEnable);
            break;
        case IDC_CHECK_VIDEO_TIME_LIMIT:
            EnableWindow(GetDlgItem(hwndDlg, IDC_VIDEO_TIME_LIMIT), bEnable);
            break;
        default:
            CBR(FALSE);
            break;
    }

Error:
    return;
}

// ***************************************************************************
// Function Name: IsOwned
//
// Purpose: Determine if hwnd is owned by hwndOwner.
//
// Arguments:
//   hwndOwner - Handle to the owner window
//   hwnd      - Handle to the owned window
//
// Return Values:
//   TRUE if hwnd is owned by hwndOwner.
//   FALSE if hwnd isn't owned by hwndOwner.

BOOL IsOwned(HWND hwndOwner, HWND hwnd)
{
    BOOL bOwned = FALSE;

    while (NULL != (hwnd = GetWindow(hwnd, GW_OWNER)))
    {
        if (hwnd == hwndOwner)
        {
            bOwned = TRUE;
            break;
        }
    }

    return bOwned;
}

// ***************************************************************************
// Function Name: EnumLastActiveWindowProc
//
// Purpose: Get the topmost, visible, enabled window who is owned by the
//          window which specified by the application-defined value given
//          in EnumWindows.
//
// Arguments:
//   hwnd   - Handle to a top-level window
//   lParam - Handle to the window which specified by the application-defined
//            value given in EnumWindows
//
// Return Values:
//   TRUE continues enumeration. FALSE stops enumeration.

BOOL CALLBACK EnumLastActiveWindowProc(HWND hwnd, LPARAM lParam)
{
    BOOL bContinue = TRUE;
    HWND hOwner = *((HWND *)lParam);

    // Ignore windows which are invisible, disabled or cannot be activated.
    if (!IsWindowVisible(hwnd) ||
        !IsWindowEnabled(hwnd) ||
        (WS_EX_NOACTIVATE & GetWindowExStyle(hwnd)))
    {
        // Continue enumeration.
        goto Exit;
    }

    // If this is the owner window, there are no owned windows because
    // all owned windows are always above its owner in the z-order.
    if (hwnd == hOwner)
    {
        // Not found the owned window. Stop enumeration.
        bContinue = FALSE;
        goto Exit;
    }

    // Is this window owned by hwndOwner?
    if (IsOwned(hOwner, hwnd))
    {
        // Found the last owned window. Stop enumeration.
        bContinue = FALSE;
        *((HWND *)lParam) = hwnd;
        goto Exit;
    }

Exit:
    return bContinue;
}

// ***************************************************************************
// Function Name: GetLastActiveWindow
//
// Purpose: Retrieves the last active window owned by hwndOwner.
//          The return value is the same as the hwndOwner parameter
//          if hwndOwner does not own any windows.
//
// Arguments:
//   hwndOwner - Handle to the owner window
//
// Return Values:
//   Handle to the last active window.

HWND GetLastActiveWindow(HWND hwndOwner)
{
    HWND hwndLastActive = hwndOwner;
    EnumWindows(EnumLastActiveWindowProc, (LPARAM)&hwndLastActive);
    return hwndLastActive;
}