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- /*---------------------------------------------------
- BACHTOCC.C -- Bach Toccata in D Minor (First Bar)
- (c) Charles Petzold, 1992
- ---------------------------------------------------*/
-
- #include <windows.h>
- #include <mmsystem.h>
-
- #define ID_TIMER 1
-
- long FAR PASCAL WndProc (HWND, WORD, WORD, LONG) ;
-
- char szAppName[] = "BachTocc" ;
-
- int PASCAL WinMain (HANDLE hInstance, HANDLE hPrevInstance,
- LPSTR lpszCmdParam, int nCmdShow)
- {
- HWND hwnd ;
- MSG msg ;
- WNDCLASS wndclass ;
-
- if (!hPrevInstance)
- {
- wndclass.style = CS_HREDRAW | CS_VREDRAW ;
- wndclass.lpfnWndProc = WndProc ;
- wndclass.cbClsExtra = 0 ;
- wndclass.cbWndExtra = 0 ;
- wndclass.hInstance = hInstance ;
- wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
-
- RegisterClass (&wndclass) ;
- }
-
- hwnd = CreateWindow (szAppName, "Bach Toccata in D Minor (First Bar)",
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, nCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- DWORD MidiOutMessage (HMIDIOUT hMidi, int iStatus, int iChannel,
- int iData1, int iData2)
- {
- DWORD dwMessage ;
-
- dwMessage = iStatus | iChannel | (iData1 << 8) | ((long) iData2 << 16) ;
-
- return midiOutShortMsg (hMidi, dwMessage) ;
- }
-
- long FAR PASCAL WndProc (HWND hwnd, WORD message, WORD wParam, LONG lParam)
- {
- static struct
- {
- int iDur ;
- int iNote [2] ;
- }
- noteseq [] = {
- 110, 69, 81, 110, 67, 79, 990, 69, 81, 220, -1, -1,
- 110, 67, 79, 110, 65, 77, 110, 64, 76, 110, 62, 74,
- 220, 61, 73, 440, 62, 74, 1980, -1, -1, 110, 57, 69,
- 110, 55, 67, 990, 57, 69, 220, -1, -1, 220, 52, 64,
- 220, 53, 65, 220, 49, 61, 440, 50, 62, 1980, -1, -1
- } ;
-
- static HMIDIOUT hMidiOut ;
- static int iIndex ;
- int i ;
-
- switch (message)
- {
- case WM_CREATE:
- if (!SetTimer (hwnd, ID_TIMER, 1000, NULL))
- {
- MessageBeep (MB_ICONEXCLAMATION) ;
- MessageBox (hwnd, "Too many clocks or timers!",
- szAppName, MB_ICONEXCLAMATION | MB_OK) ;
-
- DestroyWindow (hwnd) ;
- return 0 ;
- }
-
- if (midiOutOpen (&hMidiOut, MIDIMAPPER, NULL, NULL, 0L))
- {
- KillTimer (hwnd, ID_TIMER) ;
-
- MessageBeep (MB_ICONEXCLAMATION) ;
- MessageBox (hwnd, "Cannot open MIDI output device!",
- szAppName, MB_ICONEXCLAMATION | MB_OK) ;
-
- DestroyWindow (hwnd) ;
- return 0 ;
- }
-
- // Send Program Change messages for "Church Organ"
-
- MidiOutMessage (hMidiOut, 0xC0, 0, 19, 0) ;
- MidiOutMessage (hMidiOut, 0xC0, 12, 19, 0) ;
-
- return 0 ;
-
- case WM_TIMER:
- // Loop for 2-note polyphony
-
- for (i = 0 ; i < 2 ; i++)
- {
- // Note Off messages for previous note
-
- if (iIndex != 0 && noteseq[iIndex - 1].iNote[i] != -1)
- {
- MidiOutMessage (hMidiOut, 0x80, 0,
- noteseq[iIndex - 1].iNote[i], 0) ;
-
- MidiOutMessage (hMidiOut, 0x80, 12,
- noteseq[iIndex - 1].iNote[i], 0) ;
- }
-
- // Note On messages for new note
-
- if (iIndex != sizeof (noteseq) / sizeof (noteseq[0]) &&
- noteseq[iIndex].iNote[i] != -1)
- {
- MidiOutMessage (hMidiOut, 0x90, 0,
- noteseq[iIndex].iNote[i], 127) ;
-
- MidiOutMessage (hMidiOut, 0x90, 12,
- noteseq[iIndex].iNote[i], 127) ;
- }
- }
-
- if (iIndex != sizeof (noteseq) / sizeof (noteseq[0]))
- {
- SetTimer (hwnd, ID_TIMER, noteseq[iIndex++].iDur - 1, NULL);
- }
- else
- {
- midiOutClose (hMidiOut) ;
- KillTimer (hwnd, ID_TIMER) ;
- DestroyWindow (hwnd) ;
- }
-
- return 0 ;
-
- case WM_DESTROY:
- PostQuitMessage (0) ;
- return 0 ;
- }
-
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-