video edit in c++

[giulio8]

Hello,

I'd appreciate your suggestions about this drafted application for video editing. It is just the first idea, it is (barely) working but can be improved a lot! Find the code attached below. The main goal is to play an avi, averlap an annotation/image and save the new avi.

Thank you very much for your help and comments :-)

// Avi PostEdit - Annotation Re-capture
// Initial drafted code developed by giulio8  - 22/6/2009
 
// Play an AVI using the MSvfw32.lib 
// in the case of Dev-C++ link with libmsvfw32.a via
// Project>>Project Options>>Parameters>>Add Lib>>libmsvfw32.a
 
 
 
#include <cstdio>
#include <fstream>
using namespace std;
 
#include <windows.h>
 
 
#include <vfw.h>
 
 
 
#include "avi_utils.h"
 
 
#include <shlwapi.h>
//Nota: perché questo codice funzioni va linkato anche con shlwapi.lib; in VC++ si può ottenere tale effetto anche con un #pragma non standard
#ifdef _MSC_VER
#pragma comment(lib,"shlwapi.lib")
#endif
//...
 
 
#define ID_MCIFrame 0
#define ID_MENU1 9001
#define ID_MENU2 9002
#define ID_MENU3 9003
#define ID_MENU4 9004
#define ID_MENU5 9005
#define ID_MENU6 9006
#define ID_MENU7 9007
 
static HINSTANCE BCX_hInstance;
static int     BCX_ScaleX;
static int     BCX_ScaleY;
static char    BCX_ClassName[2048];
static HANDLE  ghInst;
static HWND    Form1;
static HWND    MCIFrame;
static HMENU   MainMenu;
static HMENU   FileMenu;
static OPENFILENAME OpenFileName;
static char    szFile[2048];
static char    szFileTitle[2048];
static char    szFileBmp[2048];
static char    szFileTitleBmp[2048];
static char    szFileBmpC[2048];
static char    szFileTitleBmpC[2048];
 
#define Show(Window)  RedrawWindow(Window,0,0,0);ShowWindow(Window,SW_SHOW);
 
HWND    BCX_Form(char*,int=0,int=0,int=250,int=150,int=0,int=0);
void    BCX_Set_Form_Color (HWND,COLORREF);
void    Center (HWND,HWND=0,HWND=0);
char*   BCX_TmpStr(size_t);
char*   str (double);
char*   curdir (void);
 
void    FormLoad (void);
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);
int     InitOpenFileName (void);
int     PopFileOpenDlg (HWND, char *, char *);
BOOL    AddMenu (HWND);
 
LONG lFrame_start;
LONG lFrame_end;
 
// standard Windows Graphical User Interface main
int WINAPI WinMain(HINSTANCE hInst,HINSTANCE hPrev,LPSTR CmdLine,int CmdShow)
{
 WNDCLASS Wc;
 MSG      Msg;
 // *****************************
 strcpy(BCX_ClassName,"ApiEdit");
 // ************************************
 // Scale Dialog Units To Screen Units
 // ************************************
 RECT rc          =  {0,0,4,8};
 MapDialogRect       (NULL,&rc);
 BCX_ScaleX       =  rc.right/2;
 BCX_ScaleY       =  rc.bottom/4;
 BCX_hInstance    =  hInst;
 // ******************************************************
 Wc.style         =  CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
 Wc.lpfnWndProc   =  WndProc;
 Wc.cbClsExtra    =  0;
 Wc.cbWndExtra    =  0;
 Wc.hInstance     =  hInst;
 Wc.hIcon         =  LoadIcon(NULL,IDI_WINLOGO);
 Wc.hCursor       =  LoadCursor(NULL,IDC_ARROW);
 Wc.hbrBackground =  (HBRUSH)(COLOR_BTNFACE+1);
 Wc.lpszMenuName  =  NULL;
 Wc.lpszClassName =  BCX_ClassName;
 RegisterClass(&Wc);
 
 FormLoad();
 // event message loop 
 while(GetMessage(&Msg,NULL,0,0))
 {
    HWND hActiveWindow = GetActiveWindow();
    if (!IsWindow(hActiveWindow) || !IsDialogMessage(hActiveWindow,&Msg))
      {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
      }
 }
 return Msg.wParam;
}
 
 
// circular storage, hold the memory leaks to a minimum
char *BCX_TmpStr (size_t Bites)
{
  static int   StrCnt;
  static char *StrFunc[2048];
  StrCnt=(StrCnt + 1) & 2047;
  if(StrFunc[StrCnt]) free (StrFunc[StrCnt]);
  return StrFunc[StrCnt]=(char*)calloc(Bites+128,sizeof(char));
}
 
 
char *str (double d)
{
  register char *strtmp = BCX_TmpStr(16);
  sprintf(strtmp,"% .15G",d);
  return strtmp;
}
 
 
char *curdir (void)
{
  register char *strtmp = BCX_TmpStr(2048);
  GetCurrentDirectory (1024,strtmp);
  return strtmp;
}
 
 
// center the window form on the screen, optional, for looks
void Center (HWND hwnd, HWND Xhwnd, HWND Yhwnd)
{
  RECT rect, rectP;
  int  x, y, width, height;
  int  screenwidth, screenheight;
  if(Xhwnd==0)
    {
      RECT  DesktopArea;
      RECT  rc;
      SystemParametersInfo(SPI_GETWORKAREA,0,&DesktopArea,0);
      GetWindowRect(hwnd,&rc);
      SetWindowPos(hwnd,HWND_TOP,
        ((DesktopArea.right-DesktopArea.left)-(rc.right-rc.left))/2+
          DesktopArea.left,((DesktopArea.bottom-DesktopArea.top)-
         (rc.bottom-rc.top))/2 + DesktopArea.top,0,0,SWP_NOSIZE);
      return;
    }
  GetWindowRect (hwnd,&rect);
  GetWindowRect (Xhwnd,&rectP);
  width = rect.right-rect.left;
  x = ((rectP.right-rectP.left)-width)/2 + rectP.left;
  if (Yhwnd==NULL)
  {
      height = rect.bottom-rect.top;
      y = ((rectP.bottom-rectP.top)-height)/2 + rectP.top;
  }
  else
  {
      GetWindowRect(Yhwnd,&rectP);
      height = rect.bottom-rect.top;
      y = ((rectP.bottom-rectP.top)-height)/2+rectP.top;
  }
  screenwidth = GetSystemMetrics(SM_CXSCREEN);
  screenheight = GetSystemMetrics(SM_CYSCREEN);
  if ((x<0)) 
    x=0;
  if ((y<0)) 
    y=0;
  if ((x+width>screenwidth))   
    x = screenwidth-width;
  if ((y+height>screenheight)) 
    y = screenheight-height;
  MoveWindow (hwnd, x, y, width, height, FALSE);
}
 
 
// create the windows form
HWND BCX_Form(char *Caption, int X, int Y, int W, int H, int Style, int Exstyle)
{
   HWND  A;
   // assigne default style if none given
   if (!Style)
   {
        Style= WS_MINIMIZEBOX  |
        WS_SIZEBOX      |
        WS_CAPTION      |
        WS_MAXIMIZEBOX  |
        WS_POPUP        |
        WS_SYSMENU;
   }
   A = CreateWindowEx(Exstyle,BCX_ClassName,Caption,
   Style,
   X*BCX_ScaleX,
   Y*BCX_ScaleY,
   (4+W)*BCX_ScaleX,
   (12+H)*BCX_ScaleY,
   NULL,(HMENU)NULL,BCX_hInstance,NULL);
   SendMessage(A,(UINT)WM_SETFONT,(WPARAM)GetStockObject(DEFAULT_GUI_FONT),
     (LPARAM)MAKELPARAM(FALSE,0));
   return A;
}
 
 
// color, why not
void BCX_Set_Form_Color (HWND hWnd, COLORREF Kolor)
{
  HBRUSH hbr=CreateSolidBrush(Kolor);
  DeleteObject((HBRUSH)SetClassLong(hWnd,GCL_HBRBACKGROUND,(DWORD)hbr));
  InvalidateRect (hWnd,NULL,TRUE);
}
 
 
// the details - corner coordinates,width,height,title
void FormLoad (void)
{
    Form1=BCX_Form("PostEdit Capture",0,0,197,170);
    SetClassLong(Form1,GCL_STYLE,GetClassLong(Form1,GCL_STYLE)|CS_DBLCLKS);
    BCX_Set_Form_Color(Form1,RGB(0,0,0));
    //  Now create the MCIWnd 
    MCIFrame=MCIWndCreate(Form1,(HINSTANCE)ghInst,WS_CHILD|WS_VISIBLE|MCIWNDF_NOPLAYBAR|MCIWNDF_NOTIFYALL,"");
    AddMenu(Form1);
    Center(Form1);
    Show(Form1);
 
}
 
int InitSaveFileName (void)
{
  *szFile=0;
  *szFileTitle=0;
  OpenFileName.lStructSize=sizeof(OPENFILENAME);
  OpenFileName.hwndOwner=MCIFrame;
  OpenFileName.hInstance=(HINSTANCE)ghInst;
  OpenFileName.lpstrFilter =
    "Bmp Files (*.BMP)\0*.bmp\0All Files(*.*)\0*.*\0\0";
  OpenFileName.lpstrCustomFilter=NULL;
  OpenFileName.nMaxCustFilter=0;
  OpenFileName.nFilterIndex=0;
  OpenFileName.lpstrFile=szFile;
  OpenFileName.nMaxFile=MAX_PATH;
  OpenFileName.lpstrFileTitle=szFileTitle;
  OpenFileName.nMaxFileTitle=MAX_PATH;
  OpenFileName.lpstrInitialDir=curdir();
  OpenFileName.lpstrTitle=NULL;
  OpenFileName.nFileOffset=0;
  OpenFileName.nFileExtension=0;
  OpenFileName.lpstrDefExt="*.bmp";
  OpenFileName.lCustData=0L;
  OpenFileName.Flags=OFN_SHOWHELP|OFN_PATHMUSTEXIST|OFN_HIDEREADONLY;
  OpenFileName.lpfnHook=NULL;
  OpenFileName.lpTemplateName=NULL;
  return 0;
}
 
int PopFileSaveDlg (HWND Form1, char *szFileBmp, char *szFileTitleBmp)
{
  OpenFileName.lpstrTitle="Save bitmap";
  OpenFileName.hwndOwner=MCIFrame;
  OpenFileName.lpstrFile=szFileBmp;
  OpenFileName.lpstrFileTitle=szFileTitleBmp;
  OpenFileName.Flags=OFN_EXPLORER|OFN_CREATEPROMPT;
  return GetOpenFileNamePreview(&OpenFileName);
}
 
 
 
/* 
Funzione per scrivere l'handle di una bitmap su file 
Thanks to http://www.geocities.com/krishnapg/bitmap.html#SaveBitmap 
*/ 
void SaveBitmap(char *szFilename,HBITMAP hBitmap){ 
      HDC        hdc=NULL; 
      FILE*      fp=NULL; 
      LPVOID     pBuf=NULL; 
      BITMAPINFO bmpInfo; 
      BITMAPFILEHEADER  bmpFileHeader; 
      do{ 
            hdc=GetDC(NULL); 
            ZeroMemory(&bmpInfo,sizeof(BITMAPINFO)); 
            bmpInfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER); 
            GetDIBits(hdc,hBitmap,0,0,NULL,&bmpInfo,DIB_RGB_COLORS); 
            if(bmpInfo.bmiHeader.biSizeImage<=0) 
            bmpInfo.bmiHeader.biSizeImage=bmpInfo.bmiHeader.biWidth*abs(bmpInfo.bmiHeader.biHeight)*(bmpInfo.bmiHeader.biBitCount+7)/8; 
            if((pBuf = malloc(bmpInfo.bmiHeader.biSizeImage))==NULL) 
            { 
                  //MessageBox( NULL, "Unable to Allocate Bitmap Memory", "Error", MB_OK|MB_ICONERROR); 
                  break; 
            }           
            bmpInfo.bmiHeader.biCompression=BI_RGB; 
            GetDIBits(hdc,hBitmap,0,bmpInfo.bmiHeader.biHeight,pBuf, &bmpInfo, DIB_RGB_COLORS);       
            if((fp = fopen(szFilename,"wb"))==NULL) 
            { 
                  //MessageBox( NULL, "Unable to Create Bitmap File", "Error", MB_OK|MB_ICONERROR); 
                  break; 
            } 
            bmpFileHeader.bfReserved1=0; 
            bmpFileHeader.bfReserved2=0; 
            bmpFileHeader.bfSize=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+bmpInfo.bmiHeader.biSizeImage; 
            bmpFileHeader.bfType='MB'; 
            bmpFileHeader.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER); 
            fwrite(&bmpFileHeader,sizeof(BITMAPFILEHEADER),1,fp); 
            fwrite(&bmpInfo.bmiHeader,sizeof(BITMAPINFOHEADER),1,fp); 
            fwrite(pBuf,bmpInfo.bmiHeader.biSizeImage,1,fp); 
      }while(false); 
            if(hdc)     ReleaseDC(NULL,hdc); 
            if(pBuf)    free(pBuf); 
            if(fp)      fclose(fp); 
} 
 
 
// event message handler
LRESULT CALLBACK WndProc (HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
  static char s[2048];
  memset(&s,0,sizeof(s));
  static char mstr[2048];
  memset(&mstr,0,sizeof(mstr));
  static char mstr1[2048];
  memset(&mstr1,0,sizeof(mstr1));
  while(1)
  {
    if (Msg==WM_CREATE)
    {
      return 0;
      break;
    }
    if (Msg==WM_COMMAND)
    {
      if (LOWORD(wParam)==ID_MENU2)
      {
          MCIWndClose(MCIFrame);
          InitOpenFileName();
         PopFileOpenDlg(Form1,szFile,szFileTitle);
//           strcpy(szFile,"d:\\dati\\amss\\cam_guida2.avi");
          if(strlen(szFile)>0)
          {
              MCIWndOpen(MCIFrame,szFile,0);
  AppendMenu(FileMenu,MF_STRING,ID_MENU6,"&Start frame");
 
 
          }
          return 0;
      }
      if(LOWORD(wParam)==ID_MENU3)
      {
          MCIWndClose(MCIFrame);
          ExitProcess(0);
      }
      //break;
      // if(LOWORD(wParam)==ID_MENU4)
      //{
 
      //}
 
 
       if(LOWORD(wParam)==ID_MENU5)
      {
HDC hDc = CreateCompatibleDC(GetDC(MCIFrame));
RECT rcWind;
GetClientRect(MCIFrame, &rcWind);
int width = rcWind.right - rcWind.left;
int height = rcWind.bottom - rcWind.top;
 
static char    szFileAvi[2048];
static char    szFileTitleAvi[2048];
          InitOpenFileName();
         PopFileOpenDlg(Form1,szFileAvi,szFileTitleAvi);
HAVI avi = CreateAvi(szFileAvi,5,NULL);
 
static  char  bmptemp[2048];
    BROWSEINFO bi = { 0 };
    TCHAR path[MAX_PATH];
    bi.lpszTitle = "Pick a Temp Directory";
    bi.pszDisplayName = path;
    LPITEMIDLIST pidl = SHBrowseForFolder ( &bi );
    if ( pidl != 0 )
    {
        // get the name of the folder
 
 
        sprintf(bmptemp, "%s", path);
        // free memory used
        IMalloc * imalloc = 0;
        if ( SUCCEEDED( SHGetMalloc ( &imalloc )) )
        {
            imalloc->Free ( pidl );
            imalloc->Release ( );
        }
    }
 
 
 
char buffer[100]; 
LONG lFrame;
lFrame = MCIWndGetPosition(MCIFrame); 
 
for (LONG i=lFrame_start; i<=lFrame_end; i++)
{ 
    MCIWndSeek(MCIFrame,i);
  HBITMAP hBmp = CreateCompatibleBitmap(GetDC(MCIFrame), width, height);   
 
   // join em up
   SelectObject(hDc, hBmp);   
 
   // copy from the screen to my bitmap
   BitBlt(hDc, 0, 0, width, height, GetDC(MCIFrame), 0, 0, SRCCOPY);  
 
      // avifile.appendNewFrame(hBitmap);
 
 
 
  //sprintf(buffer, "%s%i.bmp", bmptemp, i); // image a rajouter
  sprintf(buffer, "%s.bmp", bmptemp);
  SaveBitmap(buffer,hBmp);
 
  HBITMAP hBmpDIB =(HBITMAP)LoadImage(NULL,buffer,IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);
 
if (i==lFrame_start) // Set up compression just before the first frame
  {  AVICOMPRESSOPTIONS opts; 
    ZeroMemory(&opts,sizeof(opts));
    opts.fccHandler=mmioFOURCC('D','I','V','X');
    SetAviVideoCompression(avi,hBmpDIB,&opts,true,Form1);
}
    AddAviFrame(avi,hBmpDIB);
  DeleteObject(hBmp); 
    DeleteObject(hBmpDIB); 
}
CloseAvi(avi);
MessageBox(NULL,"Avi saved.","COMPLETED",MB_OK | MB_ICONINFORMATION);
 
 
      }
 
 
       if(LOWORD(wParam)==ID_MENU6)
      {
 
lFrame_start = MCIWndGetPosition(MCIFrame);                                   
  AppendMenu(FileMenu,MF_STRING,ID_MENU7,"&End Frame");
            }
       if(LOWORD(wParam)==ID_MENU7)
      {
lFrame_end = MCIWndGetPosition(MCIFrame);                                   
            // AppendMenu(FileMenu,MF_STRING,ID_MENU4,"&Save bmp");
  AppendMenu(FileMenu,MF_STRING,ID_MENU5,"&Save capture");
            }
break;
    }
 
    if (Msg==MCIWNDM_NOTIFYMODE)
    {
      while(1)
      {
        if ((long)lParam==MCI_MODE_NOT_READY)
        {
          SetWindowText(Form1,"Not Ready");
          break;
        }
        if ((long)lParam==MCI_MODE_PAUSE)
        {
          SetWindowText(Form1,"Paused");
          break;
        }
        if ((long)lParam==MCI_MODE_PLAY)
        {
          SetWindowText(Form1,"Playing");
          break;
        }
        if ((long)lParam==MCI_MODE_STOP)
        {
          SetWindowText(Form1,"Stopped");
          break;
        }
        if ((long)lParam==MCI_MODE_OPEN)
        {
          SetWindowText(Form1,"Opening");
          break;
        }
        if ((long)lParam==MCI_MODE_RECORD)
        {
          SetWindowText(Form1,"Recording");
          break;
        }
        if ((long)lParam==MCI_MODE_SEEK)
        {
          SetWindowText(Form1,"Seeking");
        }
        break;
      }
      break;
    }
    if (Msg==MCIWNDM_NOTIFYMEDIA)
    {
      SetWindowText(Form1,(LPSTR)lParam);
      break;
    }
    if (Msg==MCIWNDM_NOTIFYPOS)
    {
      SetWindowText(Form1,str(MCIWndGetPosition(MCIFrame)));
      break;
    }
    if (Msg==MCIWNDM_NOTIFYERROR)
    {
      SetWindowText(Form1,"MCI ERROR");
      break;
    }
    if (Msg==WM_PAINT)
    {
      //  The VideoWindow is restricted to a ratio of 4:3 here 
      break;
    }
    if (Msg==WM_SIZE)
    {
      static  WORD  Basedsp;
      memset(&Basedsp,0,sizeof(Basedsp));
      static  WORD  Cntr;
      memset(&Cntr,0,sizeof(Cntr));
      Basedsp=(HIWORD(lParam)-20)/3;
      Cntr=(LOWORD(lParam)-(Basedsp*4))/2;
      // MoveWindow(MCIFrame,Cntr,0,(Basedsp*4),HIWORD(lParam),TRUE);
      //  Don't forget to close opened Files 
      break;
    }
    if (Msg==WM_CLOSE)
    {
      MCIWndClose(MCIFrame);
      DestroyWindow(Form1);
      return 0;
      break;
    }
    if (Msg==WM_DESTROY)
    {
      MCIWndClose(MCIFrame);
      PostQuitMessage(0);
      return 0;
    }
    break;
  }
  // tidy up and exit program
  if (Msg==WM_DESTROY)
  {
       UnregisterClass(BCX_ClassName,BCX_hInstance);
       PostQuitMessage(0);
  }
  return DefWindowProc(hWnd,Msg,wParam,lParam);
}
 
 
// tons of options for the neat file dialog box
int InitOpenFileName (void)
{
  *szFile=0;
  *szFileTitle=0;
  OpenFileName.lStructSize=sizeof(OPENFILENAME);
  OpenFileName.hwndOwner=MCIFrame;
  OpenFileName.hInstance=(HINSTANCE)ghInst;
  OpenFileName.lpstrFilter =
    "Avi Files (*.AVI)\0*.avi\0All Files(*.*)\0*.*\0\0";
  OpenFileName.lpstrCustomFilter=NULL;
  OpenFileName.nMaxCustFilter=0;
  OpenFileName.nFilterIndex=0;
  OpenFileName.lpstrFile=szFile;
  OpenFileName.nMaxFile=MAX_PATH;
  OpenFileName.lpstrFileTitle=szFileTitle;
  OpenFileName.nMaxFileTitle=MAX_PATH;
  OpenFileName.lpstrInitialDir=curdir();
  OpenFileName.lpstrTitle=NULL;
  OpenFileName.nFileOffset=0;
  OpenFileName.nFileExtension=0;
  OpenFileName.lpstrDefExt="*.avi";
  OpenFileName.lCustData=0L;
  OpenFileName.Flags=OFN_SHOWHELP|OFN_PATHMUSTEXIST|OFN_FILEMUSTEXIST|OFN_HIDEREADONLY;
  OpenFileName.lpfnHook=NULL;
  OpenFileName.lpTemplateName=NULL;
  return 0;
}
 
int PopFileOpenDlg (HWND Form1, char *szFile, char *szFileTitle)
{
  OpenFileName.lpstrTitle="Open File";
  OpenFileName.hwndOwner=MCIFrame;
  OpenFileName.lpstrFile=szFile;
  OpenFileName.lpstrFileTitle=szFileTitle;
  OpenFileName.Flags=OFN_EXPLORER|OFN_CREATEPROMPT;
  return GetOpenFileNamePreview(&OpenFileName);
}
 
 
BOOL AddMenu (HWND hwndOwner)
{
  MainMenu=CreateMenu();
  FileMenu=CreateMenu();
  InsertMenu(MainMenu,0,MF_POPUP,(UINT)FileMenu,"&File");
  AppendMenu(FileMenu,MF_STRING,ID_MENU2,"&Open");
  AppendMenu(FileMenu,MF_STRING,ID_MENU3,"&Exit");
//  AppendMenu(FileMenu,MF_STRING,ID_MENU4,"&Save bmp");
//  AppendMenu(FileMenu,MF_STRING,ID_MENU5,"&Save capture");
  // activate the menu 
  if (!SetMenu(hwndOwner,MainMenu))
  {
      return FALSE;
  }
  return TRUE;
}
 

Just some clarification...

The first issue I noticed is related to the size of the new edited avi saved, that is too big as compared to the original one. I assume that is due to some wrong settings in my code. But also anything else about performance and quality is welcome! :-)

A second question I would ask is about overlapping an image on the bitmaps of the api. In my code the avi is played and recaptured one bitmap at a time. I wonder whether you could directly overlap an image on the bitmaps without playing/recapturing.

Eventually a third point could be the use of better library than shlwapi.lib or different avi_utils...

[giulio8]

@giulio8
Ok, I think I have to use:

graphic = Graphics.FromImage(bitmap);
...
graphic.DrawLine... etc.