win32视频播放器报告.doc

视频播放器一、 题目要求实现播放AVI格式视频的基本功能。二、 功能需求能够播放AVI格式的视频，实现打开、播放、暂停、停止、关闭视频的功能，播放视频过程中可以调节视频播放的音量和播放进度,可以设置全屏播放视频和重复播放。三、 总体设计1、 系统模块打开视频播放暂停停止重复全屏音量进度关闭视频2、 详细设计及功能实现代码（1） 首先设计视频播放器的总体框架（创建基本窗口和功能的要求WinMain.cpp）。LRESULT CALLBACK WndProc(HWND hWnd, UINT message,WPARAM wParam,LPARAM lParam)switch (message)case WM_CREATE:msgCreate( hWnd, message, wParam,lParam);break;case WM_PAINT:msgPaint(hWnd,message,wParam,lParam);break; case WM_DESTROY:msgDestroy(hWnd,message,wParam,lParam);break;case WM_SIZE:msgSize(hWnd,message,wParam,lParam);break;case WM_GETMINMAXINFO:msgGetMinMaxInfo(hWnd,message,wParam,lParam);break;case WM_SYSCOMMAND:msgSysCommand(hWnd,message,wParam,lParam);break;case WM_NOTIFY:msgNotify(hWnd,message,wParam,lParam);break;case WM_KEYDOWN:msgKeyDown(hWnd,message,wParam,lParam);break;case WM_TIMER:msgTimer(hWnd,message,wParam,lParam);break;case WM_CLOSE:SendMessage(hWnd,WM_DESTROY,wParam,lParam);break;case WM_COMMAND:switch (LOWORD(wParam)/opencase IDM_OPEN:cmdOpenFile(hWnd);break;case IDM_EXIT:cmdExit(hWnd);break;/viewcase IDM_TOOLBAR:cmdToolbar(hWnd);break;case IDM_TOP_MOST:cmdTopMost(hWnd);break;case IDM_FULL_SCREEN:cmdFullScreen(hWnd);break;/playcase IDM_PLAY:cmdPlay(hWnd);break;case IDM_PAUSE:cmdPause(hWnd);break;case IDM_STOP:cmdStop(hWnd);break;case IDM_REWIND:cmdRewind(hWnd);break;case IDM_FORWARD:cmdForward(hWnd);break;case IDM_REPEAT:cmdRepeat(hWnd);break;/voicecase IDM_VOICEDOWN:VoiceDown(hWnd,message,wParam,lParam);break;case IDM_VOICEUP:VoiceUp(hWnd,message,wParam,lParam);break;/aboutcase IDM_ABOUT:cmdAbout(hWnd);break;default:return (DefWindowProc(hWnd,message,wParam,lParam);break;default:return (DefWindowProc(hWnd,message,wParam,lParam);return 0;（2） 创建Global.h头文件，并声明所有的功能函数及定义全局变量。 #define IDM_TIMER30000/#define TIMER_TIMEOUT100/messageLRESULT msgCreate(HWND, UINT, WPARAM, LPARAM);/WM_CREATE:LRESULT msgDestroy(HWND, UINT, WPARAM, LPARAM);/WM_DESTROY:LRESULT msgSize(HWND, UINT, WPARAM, LPARAM);/WM_SIZE:LRESULT msgKeyDown(HWND, UINT, WPARAM, LPARAM);/WM_KEYDOWN:LRESULT msgTimer(HWND, UINT, WPARAM, LPARAM);/WM_TIMER:LRESULT msgPaint(HWND, UINT, WPARAM, LPARAM);/WM_PAINT:LRESULT msgGetMinMaxInfo(HWND, UINT, WPARAM, LPARAM);/WM_GETMINMAXINFO:LRESULT msgSysCommand(HWND, UINT, WPARAM, LPARAM);/WM_SYSCOMMAND:LRESULT msgNotify(HWND, UINT, WPARAM, LPARAM);/WM_NOTIFY:/commandLRESULT cmdExit(HWND);/IDM_EXIT:LRESULT cmdAbout(HWND);/IDM_ABOUT:LRESULT cmdOpenFile(HWND);/IDM_OPEN:LRESULT cmdPlay(HWND);/IDM_PLAY:LRESULT cmdPause(HWND);/IDM_PAUSE:LRESULT cmdStop(HWND);/IDM_STOP:LRESULT cmdRewind(HWND);/IDM_REWIND:LRESULT cmdForward(HWND);/IDM_FORWARD:LRESULT cmdRepeat(HWND);/IDM_REPEAT:LRESULT cmdToolbar(HWND);/IDM_TOOLBAR:LRESULT cmdTopMost(HWND);/IDM_TOPMOST:LRESULT cmdFullScreen(HWND);/IDM_FULLSCREEN:LRESULT VoiceUp(HWND hwnd, UINT uMessage, WPARAM wparam, LPARAM lparam);LRESULT VoiceDown(HWND hwnd, UINT uMessage, WPARAM wparam, LPARAM lparam);/* * Global function prototypes. * TO DO: Add global function prototypes here. */BOOL createToolbar(HWND);/void updateStatusBar(LPCTSTR, double);/void openVideoFile(HWND, LPSTR);/BOOL centerWindow(HWND, HWND);/BOOL initApplication(HINSTANCE, int);/LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);/UINT CALLBACK ofnHookProc(HWND, UINT, WPARAM, LPARAM);/ -/ Global Variable declarations/extern HINSTANCE g_hinstance;/ 实例句柄，当前句柄extern char szAppName;extern char szTitle;/文件名extern char szOpenPath;/打开文件路径extern HWNDhwndRebar;/进度条句柄extern HWND hwndToolbar;/工具栏句柄extern HWNDhwndTrack;/进度条的追踪句柄extern BOOL g_bFullScreen;/判断是否为全屏（3） 设计视频播放器的具体功能。首先是打开视频文件的功能，使其能正常打开AVI格式的视频文件。OPENFILENAME ofn;static TCHAR szFileListBuffer8192;/ String buffer especially for OFN_ALLOWMULTISELECTstrcpy(szFileListBuffer, szOpenPath);static char szFile256 = ;static char szFileTitle256;ZeroMemory(&ofn, sizeof(OPENFILENAME);ofn.lStructSize=sizeof(ofn);ofn.hwndOwner=hwnd;ofn.lpstrFilter=Media Files (All Supported Types)0*.avi;*.mpg;*.mpeg;*.asf;*.wmv;*.mp2;*.mp30 Movie File (*.avi;*.mpg;*.mpeg)0*.avi;*.mpg;*.mpeg0 Windows Media File (*.asf;*.wmv)0*.asf;*.wmv0 Audio File (*.mp2;*.mp3)0*.mp2;*.mp30 All Files(*.*)0*.*0;ofn.nFilterIndex=0;ofn.lpstrFile=szFileListBuffer;ofn.nMaxFile=sizeof(szFileListBuffer);ofn.lpstrFileTitle=szFileTitle;ofn.nMaxFileTitle=sizeof(szFileTitle);ofn.lpfnHook = ofnHookProc;ofn.Flags = OFN_FILEMUSTEXIST | OFN_ALLOWMULTISELECT |OFN_HIDEREADONLY | OFN_ENABLEHOOK |OFN_ENABLESIZING | OFN_EXPLORER;（4） 播放、暂停、停止功能的实现。此程序设计采用Mcisendstring（）函数实现视频播放器的播放功能。LRESULT cmdPlay(HWND hwnd)if(g_bAVI) mciSendString(play thevideo window, 0, 0, 0);else mciSendString(play thevideo, 0, 0, 0);InvalidateRect(hwndTrack, NULL, false);g_bPaused=FALSE;return 0;LRESULT cmdPause(HWND hwnd)if(!g_bPaused) mciSendString(pause thevideo, 0, 0, 0);g_bPaused=TRUE;/else /mciSendString(resume thevideo, 0, 0, 0);/g_bPaused=FALSE;/return 0;LRESULT cmdStop(HWND hwnd)/, WORD wCommand, WORD wNotify, HWND hwndCtrl)mciSendString(stop thevideo, 0, 0, 0);mciSendString(seek thevideo to start, 0, 0, 0); return 0;（5） 设计视频播放器的全屏和重复播放功能。LRESULT cmdRepeat(HWND hwnd)if (g_bRepeat) g_bRepeat = false;CheckMenuItem(GetMenu(hwnd), IDM_REPEAT, MF_UNCHECKED);else g_bRepeat = true;CheckMenuItem(GetMenu(hwnd), IDM_REPEAT, MF_CHECKED);return 0;LRESULT cmdFullScreen(HWND hwnd)/ Screen width and screenx = GetSystemMetrics (SM_CXSCREEN);int screeny = GetSystemMetrics (SM_CYSCREEN);if (g_bFullScreen) g_bFullScreen = false;CheckMenuItem(GetMenu(hwnd), IDM_FULL_SCREEN, MF_UNCHECKED);SendMessage(hwndToolbar, TB_SETSTATE, IDM_FULL_SCREEN, MAKELONG(TBSTATE_ENABLED, 0);/ Restore the window.if (!g_bWindowMax)ShowWindow(hwnd, SW_RESTORE);else SetWindowPos(hwnd, NULL, -2, -2, screenx+4, screeny+4, SWP_NOZORDER | SWP_FRAMECHANGED);else g_bFullScreen = true;CheckMenuItem(GetMenu(hwnd), IDM_FULL_SCREEN, MF_CHECKED);SendMessage(hwndToolbar, TB_SETSTATE, IDM_FULL_SCREEN, MAKELONG(TBSTATE_CHECKED | TBSTATE_ENABLED, 0);/ Maximize?g_bWindowMax = GetWindowLong (hwnd, GWL_STYLE) & WS_MAXIMIZE ? true : false;/ Set the windows new position.if (!g_bWindowMax)GetWindowRect(hwnd, &g_rcWindow);ShowWindow (hwnd, SW_SHOWMAXIMIZED);SetWindowPos (hwnd, NULL, -4-1, -42-1, screenx+8+2, screeny+46+2, SWP_NOZORDER | SWP_FRAMECHANGED);/ Faint: bring databrowser to front.SetForegroundWindow(FindWindow(_T(Shell_TrayWnd),);SetForegroundWindow(hwnd);return 0;（6） 设计视频播放时的音量调节功能。用cmd命令获取当前音量，是字符串类型的，存放在volum中。mciSendString(cmd,volume, sizeof(volume), 0 )。得到当前音量后，把当前音量加一常数200实现加大音量，减一常数实现减小音量功能。wsprintf(cmd,setaudio %s volume to %i,thevideo,v0+200);/修改音量mciSendString(cmd,0,NULL);wsprintf(cmd,setaudio %s volume to %i,thevideo,v0-200);/修改音量mciSendString(cmd,0,NULL);（7） 设计视频播放器的进度调节功能。先用mcisendstring()得到视频的总长度length，再用mcisendstring（status thevideo position）得到当前播放的长度。设计每快进、快退一次视频进度加、减总播放长度的一定百分量。sprintf(buffer, seek thevideo to %d, position - step);/把格式化的数据写入某个字符串mciSendString(buffer, buffer, 19, hwnd);（8） 设计视频播放器的美化。通过在窗口下方创建一排按钮来作为播放、暂停、停止、打开文件、快进、快退、加大音量、减小音量、全屏的功能按钮。再创建一进度条来观察视频的播放进度。TBBUTTON tbButton =/定义工具栏的按钮，使得toolbar中的按钮与ID对应0,IDM_PLAY,TBSTATE_ENABLED, TBSTYLE_BUTTON, 0, 0, 1,IDM_PAUSE,TBSTATE_ENABLED, TBSTYLE_BUTTON, 0, 0, 2,IDM_STOP,TBSTATE_ENABLED, TBSTYLE_BUTTON, 0, 0, 3,IDM_REWIND,TBSTATE_ENABLED, TBSTYLE_BUTTON, 0, 0,4,IDM_FORWARD,TBSTATE_ENABLED, TBSTYLE_BUTTON, 0, 0, 5,IDM_OPEN,TBSTATE_ENABLED, TBSTYLE_BUTTON, 0, 0,6, IDM_VOICEDOWN,TBSTATE_ENABLED, TBSTYLE_BUTTON, 0, 0,7, IDM_VOICEUP,TBSTATE_ENABLED, TBSTYLE_BUTTON, 0, 0,8, IDM_FULL_SCREEN,TBSTATE_ENABLED, TBSTYLE_BUTTON, 0, 0,;TBADDBITMAP tbBitamps;tbBitamps.hInst = g_hinstance; / current instancetbBitamps.nID = IDB_TOOLBAR;/添加图片到工具栏按钮上hwndToolbar=CreateWindowEx(0L, / no extended styles TOOLBARCLASSNAME, / status barNULL, / no text WS_VISIBLE| WS_CHILD | TBSTYLE_FLAT | TBSTYLE_TOOLTIPS | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | CC