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/ Windows 95 API Bible / Windows 95 API Bible 3 Disc Set.iso / Win32 API Bible Book 3 of 3 / CHAPTE16 / MIDIIN.C < prev    next >
C/C++ Source or Header  |  1996-04-29  |  11KB  |  347 lines
  1.  
  2. #include <windows.h>
  3. #include <stdio.h>
  4. #include "midiin.h"
  5.  
  6. #if defined (WIN32)
  7.     #define IS_WIN32 TRUE
  8. #else
  9.     #define IS_WIN32 FALSE
  10. #endif
  11.  
  12. #define IS_NT      IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
  13. #define IS_WIN32S  IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
  14. #define IS_WIN95   (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32
  15.  
  16.  
  17. HINSTANCE hInst;   // current instance
  18.  
  19. LPCTSTR lpszAppName = "MyApp";
  20. LPCTSTR lpszTitle   = "MIDI Input"; 
  21.  
  22. BOOL RegisterWin95( CONST WNDCLASS* lpwc );
  23.  
  24.  
  25. int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
  26.                       LPTSTR lpCmdLine, int nCmdShow)
  27. {
  28.    MSG      msg;
  29.    HWND     hWnd; 
  30.    WNDCLASS wc;
  31.  
  32.    wc.style         = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
  33.    wc.lpfnWndProc   = (WNDPROC)WndProc;       
  34.    wc.cbClsExtra    = 0;                      
  35.    wc.cbWndExtra    = 0;                      
  36.    wc.hInstance     = hInstance;              
  37.    wc.hIcon         = LoadIcon (hInstance, lpszAppName); 
  38.    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
  39.    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
  40.    wc.lpszMenuName  = lpszAppName;              
  41.    wc.lpszClassName = lpszAppName;              
  42.  
  43.    if ( IS_WIN95 )
  44.    {
  45.       if ( !RegisterWin95( &wc ) )
  46.          return( FALSE );
  47.    }
  48.    else if ( !RegisterClass( &wc ) )
  49.       return( FALSE );
  50.  
  51.    hInst = hInstance; 
  52.  
  53.    hWnd = CreateWindow( lpszAppName, 
  54.                         lpszTitle,    
  55.                         WS_OVERLAPPEDWINDOW | WS_VSCROLL, 
  56.                         CW_USEDEFAULT, 0, 
  57.                         CW_USEDEFAULT, 0,  
  58.                         NULL,              
  59.                         NULL,              
  60.                         hInstance,         
  61.                         NULL               
  62.                       );
  63.  
  64.    if ( !hWnd ) 
  65.       return( FALSE );
  66.  
  67.    ShowWindow( hWnd, nCmdShow ); 
  68.    UpdateWindow( hWnd );         
  69.  
  70.    while( GetMessage( &msg, NULL, 0, 0) )   
  71.    {
  72.       TranslateMessage( &msg ); 
  73.       DispatchMessage( &msg );  
  74.    }
  75.  
  76.    return( msg.wParam ); 
  77. }
  78.  
  79.  
  80. BOOL RegisterWin95( CONST WNDCLASS* lpwc )
  81. {
  82.     WNDCLASSEX wcex;
  83.  
  84.    wcex.style         = lpwc->style;
  85.    wcex.lpfnWndProc   = lpwc->lpfnWndProc;
  86.    wcex.cbClsExtra    = lpwc->cbClsExtra;
  87.    wcex.cbWndExtra    = lpwc->cbWndExtra;
  88.    wcex.hInstance     = lpwc->hInstance;
  89.    wcex.hIcon         = lpwc->hIcon;
  90.    wcex.hCursor       = lpwc->hCursor;
  91.    wcex.hbrBackground = lpwc->hbrBackground;
  92.    wcex.lpszMenuName  = lpwc->lpszMenuName;
  93.    wcex.lpszClassName = lpwc->lpszClassName;
  94.  
  95.    // Added elements for Windows 95.
  96.    //...............................
  97.    wcex.cbSize = sizeof(WNDCLASSEX);
  98.    wcex.hIconSm = LoadImage(wcex.hInstance, lpwc->lpszClassName, 
  99.                             IMAGE_ICON, 16, 16,
  100.                             LR_DEFAULTCOLOR );
  101.             
  102.    return RegisterClassEx( &wcex );
  103. }
  104.  
  105.  
  106. #define MSG_LEN          1024
  107. #define DATABLOCK_SIZE   1024L
  108.  
  109. // global variables
  110. //.................
  111.  
  112. enum Status
  113. {
  114.   StatusOn,
  115.   StatusError,
  116.   StatusOff,
  117. } eStatus = StatusOff;
  118.  
  119. char     msg[MSG_LEN+1];
  120.  
  121. HWND     hListBox = NULL;
  122. MMRESULT rc;
  123.  
  124. UINT       nDevId = 0;
  125. HMIDIIN    hmi = NULL;
  126. MIDIHDR*   pmh = NULL;
  127.  
  128.  
  129. LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
  130. {
  131.    switch( uMsg )
  132.    {
  133.       case WM_CREATE :
  134.               
  135.               eStatus = StatusOff;
  136.               SetWindowText(hWnd, "MIDI Input - Off");
  137.  
  138.               // allocate MIDIHDR buffer block
  139.                //..............................
  140.  
  141.               pmh = (MIDIHDR*)HeapAlloc( GetProcessHeap(),                         
  142.                                 HEAP_ZERO_MEMORY,                         
  143.                                 sizeof(MIDIHDR) );                        
  144.               if (pmh)                                                  
  145.               {                                                            
  146.                   pmh->lpData = HeapAlloc( GetProcessHeap(),             
  147.                                            HEAP_ZERO_MEMORY,             
  148.                                            DATABLOCK_SIZE);                       
  149.                   pmh->dwBufferLength = DATABLOCK_SIZE;
  150.               }
  151.               else
  152.                   return(-1);
  153.  
  154.               // create ListBox
  155.               //...............
  156.  
  157.               hListBox = CreateWindow( "LISTBOX", "",    
  158.                                        WS_CHILD | LBS_NOTIFY | WS_VSCROLL | WS_BORDER | 
  159.                                        WS_VISIBLE | LBS_NOINTEGRALHEIGHT, 
  160.                                        0, 0, 
  161.                                        0, 0,  
  162.                                        hWnd,              
  163.                                        (HMENU)101,              
  164.                                        hInst,         
  165.                                        NULL );
  166.               break;
  167.  
  168.       case WM_SIZE :
  169.               MoveWindow( hListBox, 0, 0, 
  170.                           LOWORD( lParam ), 
  171.                           HIWORD( lParam ), TRUE );
  172.               break;
  173.  
  174.       case WM_COMMAND :
  175.               switch( LOWORD( wParam ) )
  176.               {
  177.                  case IDM_ON :
  178.                         {
  179.                            if (eStatus == StatusOn)
  180.                                break; // already on
  181.  
  182.                            SendMessage(hListBox, LB_RESETCONTENT, 0, 0);
  183.  
  184.                            rc = midiInOpen(&hmi, nDevId, (DWORD)hWnd, 
  185.                                            (DWORD)NULL, CALLBACK_WINDOW);
  186.                            
  187.                            if (rc == MMSYSERR_NOERROR)
  188.                                rc = midiInReset(hmi);
  189.                            
  190.                            if (rc == MMSYSERR_NOERROR) 
  191.                                rc = midiInPrepareHeader(hmi, pmh, sizeof(MIDIHDR));
  192.                            
  193.                            if (rc == MMSYSERR_NOERROR)
  194.                                rc = midiInAddBuffer(hmi, pmh, sizeof(MIDIHDR));
  195.  
  196.                            if (rc == MMSYSERR_NOERROR)
  197.                                rc = midiInStart(hmi);
  198.                            
  199.                            if (rc == MMSYSERR_NOERROR)
  200.                            {
  201.                                eStatus = StatusOn;
  202.                                SetWindowText(hWnd, "MIDI Input - On");
  203.                            }
  204.                            else
  205.                            {
  206.                                midiInGetErrorText(rc, msg, MSG_LEN);
  207.                                MessageBox(hWnd, msg, NULL, MB_OK);
  208.                                break;
  209.                            }
  210.                         }
  211.                         break;
  212.  
  213.                  case IDM_ABOUT :
  214.                         DialogBox( hInst, "AboutBox", hWnd, About );
  215.                         break;
  216.  
  217.                  case IDM_OFF :
  218.                         {
  219.                            if (eStatus == StatusOff)
  220.                                break; // already off
  221.  
  222.                            midiInStop(hmi);
  223.                            midiInReset(hmi);
  224.                            midiInUnprepareHeader(hmi, pmh, sizeof(MIDIHDR));
  225.                            midiInClose(hmi);
  226.  
  227.                            eStatus = StatusOff;
  228.                            SetWindowText(hWnd, "MIDI Input - Off");
  229.                         }
  230.                         break;
  231.  
  232.                  case IDM_EXIT :
  233.                         DestroyWindow( hWnd );
  234.                         break;
  235.               }
  236.               break;
  237.      
  238.       case MM_MIM_DATA :
  239.               {
  240.                  sprintf(msg, "Short Message: %x %x %x",
  241.                          LOBYTE( LOWORD(lParam) ), 
  242.                          HIBYTE( LOWORD(lParam) ),   
  243.                          LOBYTE( HIWORD(lParam) ) );
  244.                  SendMessage(hListBox, LB_ADDSTRING, 0, (LPARAM)msg);  
  245.  
  246.               }
  247.               break;
  248.  
  249.       case MM_MIM_LONGDATA:
  250.               {
  251.                  DWORD     i;
  252.                  char      cTmp[5];
  253.                  LPMIDIHDR lpMidiHdr = (LPMIDIHDR)lParam;
  254.  
  255.                  // check to see if the buffer is ready to be processed
  256.                  //....................................................
  257.  
  258.                  if ( !(lpMidiHdr->dwFlags & MHDR_DONE) )
  259.                      break;
  260.  
  261.                  // display the system exclusive MIDI message
  262.                  //..........................................
  263.  
  264.                  if (lpMidiHdr->dwBytesRecorded > 0)
  265.                  {
  266.                      lstrcpy(msg, "System Exclusive: ");
  267.  
  268.                      for (i = 0; i < lpMidiHdr->dwBytesRecorded && 
  269.                                  lstrlen(msg) < MSG_LEN - 4; i++)
  270.                      {
  271.                         sprintf(cTmp, " %02x", lpMidiHdr->lpData[i]);
  272.                         lstrcat(msg, cTmp);
  273.                      }
  274.                      
  275.                      SendMessage(hListBox, LB_ADDSTRING, 0, (LPARAM)msg);
  276.                  }
  277.  
  278.                  // recycle the data buffer block
  279.                  //..............................
  280.  
  281.                  midiInPrepareHeader(hmi, lpMidiHdr, sizeof(MIDIHDR));
  282.                  midiInAddBuffer(hmi, lpMidiHdr, sizeof(MIDIHDR));
  283.               }
  284.               break;
  285.  
  286.  
  287.       case WM_DESTROY :
  288.  
  289.               // shut down midi
  290.               //...............
  291.  
  292.               if (hmi)
  293.               {
  294.                   midiInStop(hmi);
  295.                   midiInReset(hmi);
  296.                   midiInUnprepareHeader(hmi, pmh, sizeof(MIDIHDR));
  297.                   midiInClose(hmi);
  298.               }
  299.        
  300.               // free the MIDIHDR buffer block
  301.                //..............................
  302.  
  303.               if (pmh != NULL)
  304.               {
  305.                   HeapFree(GetProcessHeap(), 0, pmh->lpData);                 
  306.                   HeapFree(GetProcessHeap(), 0, pmh);
  307.                   pmh = NULL;
  308.                }
  309.  
  310.               PostQuitMessage(0);
  311.               break;
  312.  
  313.       default :
  314.             return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
  315.    }
  316.  
  317.    return( 0L );               
  318. }
  319.  
  320.  
  321.  
  322. LRESULT CALLBACK About( HWND hDlg,           
  323.                         UINT message,        
  324.                         WPARAM wParam,       
  325.                         LPARAM lParam)
  326. {
  327.    switch (message) 
  328.    {
  329.        case WM_INITDIALOG: 
  330.                return (TRUE);
  331.  
  332.        case WM_COMMAND:                              
  333.                if (   LOWORD(wParam) == IDOK         
  334.                    || LOWORD(wParam) == IDCANCEL)    
  335.                {
  336.                        EndDialog(hDlg, TRUE);        
  337.                        return (TRUE);
  338.                }
  339.                break;
  340.    }
  341.  
  342.    return (FALSE); 
  343. }
  344.  
  345.  
  346.  
  347.