record1.c

这是Windows程序设计（第五版）第21章-第23章的源代码！

               
               if (waveOutOpen (&hWaveOut, 0, &waveform, (DWORD) hwnd, 0,
                                           CALLBACK_WINDOW))
               {
                    MessageBeep (MB_ICONEXCLAMATION) ;
                    MessageBox (hwnd, szOpenError, szAppName,
                                      MB_ICONEXCLAMATION | MB_OK) ;
               }
               return TRUE ;
          }
          break ;
               
     case MM_WIM_OPEN:
               // Shrink down the save buffer
          
          pSaveBuffer = realloc (pSaveBuffer, 1) ;
          
               // Enable and disable Buttons
          
          EnableWindow (GetDlgItem (hwnd, IDC_RECORD_BEG), FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_RECORD_END), TRUE)  ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_BEG),   FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_PAUSE), FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_END),   FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_REV),   FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_REP),   FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_SPEED), FALSE) ;
          SetFocus (GetDlgItem (hwnd, IDC_RECORD_END)) ;

               // Add the buffers
          
          waveInAddBuffer (hWaveIn, pWaveHdr1, sizeof (WAVEHDR)) ;
          waveInAddBuffer (hWaveIn, pWaveHdr2, sizeof (WAVEHDR)) ;
          
               // Begin sampling
          
          bRecording = TRUE ;
          bEnding = FALSE ;
          dwDataLength = 0 ;
          waveInStart (hWaveIn) ;
          return TRUE ;
          
     case MM_WIM_DATA:
         
               // Reallocate save buffer memory
          
          pNewBuffer = realloc (pSaveBuffer, dwDataLength +
                                   ((PWAVEHDR) lParam)->dwBytesRecorded) ;
          
          if (pNewBuffer == NULL)
          {
               waveInClose (hWaveIn) ;
               MessageBeep (MB_ICONEXCLAMATION) ;
               MessageBox (hwnd, szMemError, szAppName,
                                 MB_ICONEXCLAMATION | MB_OK) ;
               return TRUE ;
          }
          
          pSaveBuffer = pNewBuffer ;
          CopyMemory (pSaveBuffer + dwDataLength, ((PWAVEHDR) lParam)->lpData,
                         ((PWAVEHDR) lParam)->dwBytesRecorded) ;
          
          dwDataLength += ((PWAVEHDR) lParam)->dwBytesRecorded ;
          
          if (bEnding)
          {
               waveInClose (hWaveIn) ;
               return TRUE ;
          }
          
               // Send out a new buffer
          
          waveInAddBuffer (hWaveIn, (PWAVEHDR) lParam, sizeof (WAVEHDR)) ;
          return TRUE ;
          
     case MM_WIM_CLOSE:
               // Free the buffer memory

          waveInUnprepareHeader (hWaveIn, pWaveHdr1, sizeof (WAVEHDR)) ;
          waveInUnprepareHeader (hWaveIn, pWaveHdr2, sizeof (WAVEHDR)) ;

          free (pBuffer1) ;
          free (pBuffer2) ;
          
               // Enable and disable buttons
          
          EnableWindow (GetDlgItem (hwnd, IDC_RECORD_BEG), TRUE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_RECORD_END), FALSE) ;
          SetFocus (GetDlgItem (hwnd, IDC_RECORD_BEG)) ;
          
          if (dwDataLength > 0)
          {
               EnableWindow (GetDlgItem (hwnd, IDC_PLAY_BEG),   TRUE)  ;
               EnableWindow (GetDlgItem (hwnd, IDC_PLAY_PAUSE), FALSE) ;
               EnableWindow (GetDlgItem (hwnd, IDC_PLAY_END),   FALSE) ;
               EnableWindow (GetDlgItem (hwnd, IDC_PLAY_REP),   TRUE)  ;
               EnableWindow (GetDlgItem (hwnd, IDC_PLAY_REV),   TRUE)  ;
               EnableWindow (GetDlgItem (hwnd, IDC_PLAY_SPEED), TRUE)  ;
               SetFocus (GetDlgItem (hwnd, IDC_PLAY_BEG)) ;
          }
          bRecording = FALSE ;
          
          if (bTerminating)
               SendMessage (hwnd, WM_SYSCOMMAND, SC_CLOSE, 0L) ;
          
          return TRUE ;
          
     case MM_WOM_OPEN:
               // Enable and disable buttons
          
          EnableWindow (GetDlgItem (hwnd, IDC_RECORD_BEG), FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_RECORD_END), FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_BEG),   FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_PAUSE), TRUE)  ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_END),   TRUE)  ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_REP),   FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_REV),   FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_SPEED), FALSE) ;
          SetFocus (GetDlgItem (hwnd, IDC_PLAY_END)) ;
          
               // Set up header
          
          pWaveHdr1->lpData          = pSaveBuffer ;
          pWaveHdr1->dwBufferLength  = dwDataLength ;
          pWaveHdr1->dwBytesRecorded = 0 ;
          pWaveHdr1->dwUser          = 0 ;
          pWaveHdr1->dwFlags         = WHDR_BEGINLOOP | WHDR_ENDLOOP ;
          pWaveHdr1->dwLoops         = dwRepetitions ;
          pWaveHdr1->lpNext          = NULL ;
          pWaveHdr1->reserved        = 0 ;
          
               // Prepare and write
          
          waveOutPrepareHeader (hWaveOut, pWaveHdr1, sizeof (WAVEHDR)) ;
          waveOutWrite (hWaveOut, pWaveHdr1, sizeof (WAVEHDR)) ;
          
          bEnding = FALSE ;
          bPlaying = TRUE ;
          return TRUE ;
          
     case MM_WOM_DONE:
          waveOutUnprepareHeader (hWaveOut, pWaveHdr1, sizeof (WAVEHDR)) ;
          waveOutClose (hWaveOut) ;
          return TRUE ;
          
     case MM_WOM_CLOSE:
               // Enable and disable buttons
          
          EnableWindow (GetDlgItem (hwnd, IDC_RECORD_BEG), TRUE)  ;
          EnableWindow (GetDlgItem (hwnd, IDC_RECORD_END), TRUE)  ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_BEG),   TRUE)  ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_PAUSE), FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_END),   FALSE) ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_REV),   TRUE)  ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_REP),   TRUE)  ;
          EnableWindow (GetDlgItem (hwnd, IDC_PLAY_SPEED), TRUE)  ;
          SetFocus (GetDlgItem (hwnd, IDC_PLAY_BEG)) ;
          
          SetDlgItemText (hwnd, IDC_PLAY_PAUSE, TEXT ("Pause")) ;
          bPaused = FALSE ;
          dwRepetitions = 1 ;
          bPlaying = FALSE ;
          
          if (bReverse)
          {
               ReverseMemory (pSaveBuffer, dwDataLength) ;
               bReverse = FALSE ;
          }
          
          if (bTerminating)
               SendMessage (hwnd, WM_SYSCOMMAND, SC_CLOSE, 0L) ;
          
          return TRUE ;
          
     case WM_SYSCOMMAND:
          switch (LOWORD (wParam))
          {
          case SC_CLOSE:
               if (bRecording)
               {
                    bTerminating = TRUE ;
                    bEnding = TRUE ;
                    waveInReset (hWaveIn) ;
                    return TRUE ;
               }
               
               if (bPlaying)
               {
                    bTerminating = TRUE ;
                    bEnding = TRUE ;
                    waveOutReset (hWaveOut) ;
                    return TRUE ;
               }
               
               free (pWaveHdr1) ;
               free (pWaveHdr2) ;
               free (pSaveBuffer) ;
               EndDialog (hwnd, 0) ;
               return TRUE ;
          }
          break ;
     }
     return FALSE ;
}