C++ (Cpp) LoopBlank Examples

Example #1

File: DSound.cpp Project: DSJim/genesis4iphone

int DSoundInit()
{
  DSBUFFERDESC dsbd;
  WAVEFORMATEX wfx;

  memset(&dsbd,0,sizeof(dsbd));
  memset(&wfx,0,sizeof(wfx));

  // Make wave format:
  wfx.wFormatTag=WAVE_FORMAT_PCM;
  wfx.nChannels=(unsigned short)((PicoOpt&8) ? 2 : 1); // Stereo/mono
  wfx.nSamplesPerSec=PsndRate;
  wfx.wBitsPerSample=16;

  wfx.nBlockAlign=(WORD)((wfx.nChannels*wfx.wBitsPerSample)>>3);
  wfx.nAvgBytesPerSec=wfx.nBlockAlign*wfx.nSamplesPerSec;

  // Make buffer for the next seg to put into the loop:
  DSoundNext=(short *)malloc(PsndLen<<2); if (DSoundNext==NULL) return 1;
  memset(DSoundNext,0,PsndLen<<2);

  // Create the DirectSound interface:
  DirectSoundCreate(NULL,&DSound,NULL);
  if (DSound==NULL) return 1;

  LoopLen=PsndLen<<1; // 2 segs

#ifndef _XBOX
  LoopLen<<=1; // 4 segs
  DSound->SetCooperativeLevel(FrameWnd,DSSCL_PRIORITY);
  dsbd.dwFlags=DSBCAPS_GLOBALFOCUS;  // Play in background
#endif

  // Create the looping buffer:
  dsbd.dwSize=sizeof(dsbd);
  dsbd.dwBufferBytes=LoopLen<<wfx.nChannels; // 16bit stereo?
  dsbd.lpwfxFormat=&wfx;

  DSound->CreateSoundBuffer(&dsbd,&LoopBuffer,NULL);
  if (LoopBuffer==NULL) return 1;

  LoopBlank();
  LoopBuffer->Play(0,0,DSBPLAY_LOOPING);
  return 0;
}

Example #2

File: dsnd.cpp Project: alban-rochel/pixbox-pcsx-rearmed

int DSoundInit(HWND wnd_coop, int rate, int stereo, int seg_samples)
{
  DSBUFFERDESC dsbd;
  WAVEFORMATEX wfx;
  DSBPOSITIONNOTIFY notifies[NSEGS];
  int i;

  memset(&dsbd,0,sizeof(dsbd));
  memset(&wfx,0,sizeof(wfx));

  // Make wave format:
  wfx.wFormatTag=WAVE_FORMAT_PCM;
  wfx.nChannels=stereo ? 2 : 1;
  wfx.nSamplesPerSec=rate;
  wfx.wBitsPerSample=16;

  wfx.nBlockAlign=(WORD)((wfx.nChannels*wfx.wBitsPerSample)>>3);
  wfx.nAvgBytesPerSec=wfx.nBlockAlign*wfx.nSamplesPerSec;

  // Create the DirectSound interface:
  DirectSoundCreate(NULL,&DSound,NULL);
  if (DSound==NULL) return 1;

  LoopSeg = seg_samples * 2;
  if (stereo)
    LoopSeg *= 2;

  LoopLen = LoopSeg * NSEGS;

  DSound->SetCooperativeLevel(wnd_coop, DSSCL_PRIORITY);
  dsbd.dwFlags=DSBCAPS_GLOBALFOCUS;  // Play in background
  dsbd.dwFlags|=DSBCAPS_GETCURRENTPOSITION2|DSBCAPS_CTRLPOSITIONNOTIFY;

  // Create the looping buffer:
  dsbd.dwSize=sizeof(dsbd);
  dsbd.dwBufferBytes=LoopLen;
  dsbd.lpwfxFormat=&wfx;

  DSound->CreateSoundBuffer(&dsbd,&LoopBuffer,NULL);
  if (LoopBuffer==NULL) return 1;

  LoopBuffer->QueryInterface(IID_IDirectSoundNotify, (LPVOID*)&DSoundNotify);
  if (DSoundNotify == NULL) {
    lprintf("QueryInterface(IID_IDirectSoundNotify) failed\n");
    goto out;
  }

  seg_played_event = CreateEvent(NULL, 0, 0, NULL);
  if (seg_played_event == NULL)
    goto out;

  for (i = 0; i < NSEGS; i++) {
    notifies[i].dwOffset = i * LoopSeg;
    notifies[i].hEventNotify = seg_played_event;
  }
  i = DSoundNotify->SetNotificationPositions(NSEGS, notifies);
  if (i != DS_OK) {
    lprintf("SetNotificationPositions failed\n");
    goto out;
  }

out:
  LoopBlank();
  LoopBuffer->Play(0, 0, DSBPLAY_LOOPING);
  return 0;
}