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C-/C++-Quelltext

HRESULT SetCaptureNotifications(LPDIRECTSOUNDCAPTUREBUFFER8 pDSCB)
{
  #define cEvents  3

  LPDIRECTSOUNDNOTIFY8 pDSNotify;
  WAVEFORMATEX         wfx;  
  HANDLE     rghEvent[cEvents] = {0};
  DSBPOSITIONNOTIFY  rgdsbpn[cEvents];
  HRESULT    hr;

  if (NULL == pDSCB) return E_INVALIDARG;
  if (FAILED(hr = pDSCB->QueryInterface(IID_IDirectSoundNotify, (LPVOID*)&pDSNotify)))
  {
    return hr;
  }
  if (FAILED(hr = pDSCB->GetFormat(&wfx, sizeof(WAVEFORMATEX), NULL)))
  {
    return hr;
  }

  // Create events.

  for (int i = 0; i < cEvents; ++i)
  {
    rghEvent[i] = CreateEvent(NULL, TRUE, FALSE, NULL);
    if (NULL == rghEvent[i])
    {
      hr = GetLastError();
      return hr;
    }
  }
 
  // Describe notifications. 

 
  rgdsbpn[0].dwOffset = (wfx.nAvgBytesPerSec/2) -1;
  rgdsbpn[0].hEventNotify = rghEvent[0];
 
  rgdsbpn[1].dwOffset = wfx.nAvgBytesPerSec - 1;
  rgdsbpn[1].hEventNotify = rghEvent[1];
 
  rgdsbpn[2].dwOffset = DSBPN_OFFSETSTOP;
  rgdsbpn[2].hEventNotify = rghEvent[2];
 
  // Create notifications.

 
  hr = pDSNotify->SetNotificationPositions(cEvents, rgdsbpn);
  pDSNotify->Release();
  return hr;
}