?? cappicture.cpp
字號(hào):
#include <windows.h> //說(shuō)明嵌入的頭文件
#include <vfw.h>
#include <commdlg.h>
#include "CapPicture.h"
LRESULT WINAPI MainWndProc( HWND, UINT, WPARAM, LPARAM ); //定義函數(shù)
LRESULT WINAPI SelCapDrvProc( HWND, UINT, WPARAM, LPARAM );
int EnumCapDrv();
VOID APIENTRY HandlePopupMenu(HWND, POINT);
DWORD WINAPI videoThreadProc(LPVOID lParam);
//說(shuō)明常量
HANDLE ghInstance;
HWND hwndMain;
HWND hwndVideo;
HWND hwndSelCapDrvDlg;
HWND hwndSelCapDrvDlg_LBox;
HWND hwndExit;
HWND hwndMin;
HWND hwndHelp;
HWND hwndRecord;
HANDLE hVideoThread;
HRGN hRegion1;
CAPDRIVERCAPS CapDrvCaps;
//說(shuō)明變量
bool isRecordFileOpen = false;
char recordFile[260];
bool isPicFileOpen = false;
char pictureFile[260];
bool isRecording = false;
bool threadEnd = false;
//消息循環(huán)函數(shù)：每個(gè)C程序的第一個(gè)進(jìn)入點(diǎn)
int PASCAL WinMain( HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpszCmdLine,
int nCmdShow )
{
WNDCLASS wc;
MSG msg;
if( !hPrevInstance )
{
wc.lpszClassName = "GenericAppClass";
wc.lpfnWndProc = MainWndProc; //主線程名稱
wc.style = CS_OWNDC | CS_VREDRAW | CS_HREDRAW; //設(shè)置窗口風(fēng)格
wc.hInstance = hInstance;
wc.hIcon = LoadIcon( NULL, IDI_APPLICATION );
wc.hCursor = LoadCursor( NULL, IDC_ARROW ); //設(shè)置光標(biāo)
wc.hbrBackground = CreateSolidBrush (RGB(156, 150, 104)); //設(shè)置窗口背景顏色
wc.lpszMenuName = "GenericAppMenu";
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
RegisterClass( &wc );
}
ghInstance = hInstance;
//創(chuàng)建主窗口
hwndMain = CreateWindow( "GenericAppClass",
"Super Video",
WS_POPUP,
100,
100,
500,
500,
NULL,
NULL,
hInstance,
NULL
);
ShowWindow( hwndMain, nCmdShow );
SetWindowRgn(hwndMain,hRegion1,1);//設(shè)置窗口位置和尺寸
while( GetMessage( &msg, NULL, 0, 0 ) ) {
TranslateMessage( &msg );
DispatchMessage( &msg );
}
return msg.wParam;
}
//第一個(gè)消息處理函數(shù)
LRESULT CALLBACK MainWndProc( HWND hwndMain, UINT msg, WPARAM wParam,
LPARAM lParam )
{
HDC hDC = GetDC(hwndMain);
RECT rc;
POINT pt;
switch( msg ) {
case WM_LBUTTONDBLCLK://調(diào)整窗口位置？這個(gè)消息是由發(fā)出的？
SetFocus(hwndMain);
break;
case WM_RBUTTONDOWN: //彈出窗口？這個(gè)消息是由發(fā)出的？
GetClientRect(hwndMain, (LPRECT) &rc);
pt.x = LOWORD(lParam);
pt.y = HIWORD(lParam);
if (PtInRect((LPRECT) &rc, pt))
HandlePopupMenu(hwndMain, pt);
break;
case WM_PAINT: //調(diào)整窗口顏色
FrameRgn(hDC,hRegion1,CreateSolidBrush(RGB(0,0,0)),2,2);
BringWindowToTop(hwndSelCapDrvDlg);//調(diào)整對(duì)話框位置
return( DefWindowProc( hwndMain, msg, wParam, lParam ));
case WM_COMMAND:
CAPSTATUS CapStatus;
switch( wParam ) {
case SOURCE://這個(gè)消息是由發(fā)出的？答：右鍵電擊主窗口邊緣區(qū)域后彈出一個(gè)對(duì)話框中第一個(gè)按鈕產(chǎn)生的消息
if(CapDrvCaps.fHasDlgVideoSource)
capDlgVideoSource(hwndVideo);//設(shè)置視頻采樣參數(shù)
break;
case FORMAT://這個(gè)消息是由發(fā)出的？答：右鍵電擊主窗口邊緣區(qū)域后彈出一個(gè)對(duì)話框中第二個(gè)按鈕產(chǎn)生的消息
if(CapDrvCaps.fHasDlgVideoFormat)
{
capDlgVideoFormat(hwndMain);//這個(gè)函數(shù)的作用？答：設(shè)置攝像窗口參數(shù)
capGetStatus(hwndVideo, &CapStatus, sizeof(CAPSTATUS));
SetWindowPos(hwndVideo, NULL, 0, 0, CapStatus.uiImageWidth,
CapStatus.uiImageHeight, SWP_NOZORDER | SWP_NOMOVE);
}
break;
case DISPLAY://這個(gè)消息是由選擇按鈕發(fā)出的？答：右鍵電擊主窗口邊緣區(qū)域后彈出一個(gè)對(duì)話框中第三個(gè)按鈕產(chǎn)生的消息
if (CapDrvCaps.fHasDlgVideoDisplay)
capDlgVideoDisplay(hwndVideo);//設(shè)置視頻圖像參數(shù)
break;
case EXIT:
SendMessage(hwndMain, WM_SYSCOMMAND, SC_CLOSE, 0);//該消息接收者為hwndMain或OS
break;
case MINIMIZE:
SendMessage(hwndMain, WM_SYSCOMMAND, SC_MINIMIZE, 0);//該消息接收者為hwndMain或OS
break;
case HELP:
SendMessage(hwndMain, WM_SYSCOMMAND, SC_CONTEXTHELP, 0); //該消息接收者為hwndMain或OS
break;
case RECORDVIDEO: //這個(gè)消息是由HWNDRecord按鈕發(fā)出的 表示要進(jìn)行視頻捕捉
if(HIWORD(wParam) == BN_CLICKED && (HWND) lParam == hwndRecord)
{
if (!isRecordFileOpen) //設(shè)置錄像存儲(chǔ)文件并進(jìn)行第一次視頻捕捉
{
OPENFILENAME ofn;
ZeroMemory(&ofn, sizeof(OPENFILENAME));
ofn.lStructSize = sizeof(OPENFILENAME);
ofn.hwndOwner = hwndMain;
ofn.lpstrFile = recordFile;
ofn.nMaxFile = sizeof(recordFile);
ofn.lpstrFilter = "Video\0*.avi";
ofn.nFilterIndex = 1;
ofn.lpstrFileTitle = NULL;
ofn.nMaxFileTitle = 0;
ofn.lpstrInitialDir = NULL;
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
if(GetSaveFileName(&ofn) == TRUE)
{
strcpy(recordFile, ofn.lpstrFile);
strcat(recordFile, ".avi");
isRecordFileOpen = true;
DWORD id;
SECURITY_ATTRIBUTES sa;
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;
hVideoThread = CreateThread(&sa, (ULONG)0,
videoThreadProc, (LPVOID)(ULONG)0, (ULONG)0, &id);//第一次視頻捕捉
if(hVideoThread == NULL)
MessageBox(NULL, "Creation of Record Thread failed!", "Thread", MB_OK | MB_ICONEXCLAMATION);
break;
}
}
if (isRecordFileOpen)
{
if(isRecording)
{
threadEnd = true;
capFileSaveAs(hwndVideo, recordFile);
SetWindowText(hwndRecord, "開(kāi)始下一次錄像");
isRecording = false;
break;
}
if(!isRecording )
{
int a = 0;
MessageBox(hwndMain, "Do you want to write over the open file?",
"File warning", MB_YESNO | MB_ICONWARNING);
if (a != IDYES)
{
isRecordFileOpen = false;
SendMessage(hwndMain, WM_COMMAND, MAKEWPARAM(RECORDVIDEO, BN_CLICKED), (LPARAM) hwndRecord);
}
if (a == IDYES)
{
capCaptureSequence(hwndVideo);//輸出文件建立前的圖像捕獲
capGrabFrame(hwndVideo);
isRecording = true;//圖像捕獲完成
}
break;
}
}
}
break;
}
break;
case WM_CREATE: //需要在窗口上建立按鈕，名稱分別為 EXIT,MINIMIZE,HELP,RECORDVIDEO
// 這個(gè)消息由誰(shuí)發(fā)出的？
RECT helpRect, minRect, exitRect;
HRGN helpRgn, minRgn, exitRgn;
hRegion1 = CreateRoundRectRgn(10,100,500, 500,20,20);
hwndVideo = capCreateCaptureWindow(
(LPSTR) "My Capture Window",
WS_CHILD | WS_VISIBLE,
150, 150, 300, 280,
(HWND) hwndMain,
(int) 1);
hwndExit = CreateWindow (
"button",
"退出",
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | BS_CENTER | BS_VCENTER,
430, 110, 40, 20,
hwndMain,
(HMENU) EXIT,
(HINSTANCE)ghInstance,
(LPVOID)NULL);
hwndMin = CreateWindow (
"button",
"隱藏",
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | BS_CENTER | BS_VCENTER,
380, 110, 40, 20,
hwndMain,
(HMENU) MINIMIZE,
(HINSTANCE)ghInstance,
(LPVOID)NULL); // 330, 110, BUTTONSIZE, BUTTONSIZE,
hwndHelp = CreateWindow (
"button",
"?",
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | BS_CENTER | BS_VCENTER,
330, 110, 40, 20,
hwndMain,
(HMENU) HELP,
(HINSTANCE)ghInstance,
(LPVOID)NULL);
hwndRecord = CreateWindow (
"button",
"開(kāi)始第一次錄像",
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | BS_CENTER | BS_VCENTER,
250, 464, 120, 28,
hwndMain,
(HMENU) RECORDVIDEO,
(HINSTANCE)ghInstance,
(LPVOID)NULL);
GetClientRect(hwndHelp, &helpRect);
GetClientRect(hwndMin, &minRect);
GetClientRect(hwndExit, &exitRect);
helpRgn = CreateEllipticRgnIndirect(&helpRect);
minRgn = CreateEllipticRgnIndirect(&minRect);
exitRgn = CreateEllipticRgnIndirect(&exitRect);
SetWindowRgn(hwndExit,exitRgn,1);
SetWindowRgn(hwndMin,minRgn,1);
SetWindowRgn(hwndHelp,helpRgn,1);
//建立設(shè)備選擇對(duì)話框
hwndSelCapDrvDlg = CreateDialog((HINSTANCE)ghInstance,
MAKEINTRESOURCE( SELCAPDRVDLG ),
0, (DLGPROC)SelCapDrvProc);
hwndSelCapDrvDlg_LBox = GetDlgItem(hwndSelCapDrvDlg,
SELCAPDRVDLG_LSTBOX);
EnumCapDrv();
break;
case WM_DESTROY: //誰(shuí)發(fā)出該消息？本程序中有一個(gè)視頻選擇窗口幾消息處理函數(shù)未建立
capPreview(hwndVideo, FALSE);
capDriverDisconnect(hwndVideo);
PostQuitMessage( 0 );
break;
default:
return( DefWindowProc( hwndMain, msg, wParam, lParam ));
}
return 0;
}
//第二個(gè)消息處理函數(shù)
LRESULT CALLBACK SelCapDrvProc( HWND hWnd, UINT msg,
WPARAM wParam, LPARAM lParam )
{
switch(msg)
{
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
switch ( wParam )
{
case SELCAPDRVDLG_BUTTON://SELECTDRVDLG中的按鈕發(fā)出的消息
int sel = 0;
SendMessage( hwndSelCapDrvDlg_LBox, LB_GETSELITEMS, 1, sel);
SendMessage( hwndVideo, WM_CAP_DRIVER_CONNECT, sel, 0L);
//將攝像機(jī)與窗口hwndVideo連接，操作系統(tǒng)的線程接收該消息
SendMessage( hwndSelCapDrvDlg, WM_CLOSE, 0, 0);
// 關(guān)閉該對(duì)話窗口
SendMessage( hwndVideo, WM_CAP_DRIVER_GET_CAPS,
sizeof(CAPDRIVERCAPS), (LONG) (LPVOID) &CapDrvCaps);
//啟動(dòng)攝像機(jī)
capPreviewRate( hwndVideo, 66 );
//capPreview( hwndVideo, TRUE );
//將攝像機(jī)圖像顯示到窗口hwndVideo
}
return TRUE;
case WM_CLOSE:
DestroyWindow(hwndSelCapDrvDlg);
//銷毀窗口hwndSelCapDrvDlg
return TRUE;
}
return( 0L );
}
int EnumCapDrv()
{
char szDeviceName[80];
char szDeviceVersion[80];
char item[161];
int i;
for (i=0; i<10; i++)
{
if ( capGetDriverDescription(i, szDeviceName, sizeof(szDeviceName),
szDeviceVersion, sizeof(szDeviceVersion)) )
{
strcpy(item, szDeviceName);
strcat(item, " ");
strcat(item, szDeviceVersion);
SendMessage(hwndSelCapDrvDlg_LBox, LB_ADDSTRING, 0,
(LPARAM) item);
SendMessage(hwndSelCapDrvDlg_LBox, LB_SETITEMDATA, i, (LPARAM) i);
}
}
return 0;
}
VOID APIENTRY HandlePopupMenu(HWND hwnd, POINT pt)
{
HMENU hmenu;
HMENU hmenuTrackPopup;
hmenu = LoadMenu((HINSTANCE)ghInstance, "PopupMenu");
if (hmenu == NULL)
return;
hmenuTrackPopup = GetSubMenu(hmenu, 0);
ClientToScreen(hwnd, (LPPOINT) &pt);
TrackPopupMenu(hmenuTrackPopup, TPM_LEFTALIGN | TPM_LEFTBUTTON,
pt.x, pt.y, 0, hwnd, NULL);
DestroyMenu(hmenu);
}
DWORD WINAPI videoThreadProc(LPVOID lParam)
{
SetWindowText(hwndRecord, "停止本次錄像");
capCaptureSequence(hwndVideo);
capGrabFrameNoStop(hwndVideo);
//capCaptureSingleFrameOpen(hwndVideo);已通過(guò)受動(dòng)打開(kāi)輸出文件
capCaptureSingleFrame(hwndVideo);
char *szName="H:/MyFrame.bmp";
capFileSaveDIB(hwndVideo,szName);//將當(dāng)前frame存儲(chǔ)到位圖文件H:/MyFrame.bmp中
//capCaptureSingleFrameClose(hwndVideo);
isRecording = true;
while (!threadEnd)
;
MessageBox(NULL, "關(guān)閉本次錄像線程", "thread", NULL);
return 0;
}?? 快捷鍵說(shuō)明
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