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DirectSound Stream Data Format

  • Artikel

This example uses a KSDATAFORMAT_DSOUND structure to describe the data format of a DirectSound stream.

  DataFormat.FormatSize  = sizeof(KSDATAFORMAT_DSOUND);
 DataFormat.Flags       = 0;
  DataFormat.SampleSize  = 0;
  DataFormat.Reserved    = 0;
  DataFormat.MajorFormat = STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO);
  DataFormat.SubFormat   = STATICGUIDOF(KSDATAFORMAT_SUBTYPE_PCM);
 DataFormat.Specifier   = STATICGUIDOF(KSDATAFORMAT_SPECIFIER_DSOUND);
  BufferDesc.Flags       = KSDSOUND_BUFFER_LOCHARDWARE;
  BufferDesc.Control     = KSDSOUND_BUFFER_CTRL_3D;
  BufferDesc.WaveFormatEx.wFormatTag      = WAVE_FORMAT_PCM;
  BufferDesc.WaveFormatEx.nChannels       = 2;
  BufferDesc.WaveFormatEx.nSamplesPerSec  = 22050;
  BufferDesc.WaveFormatEx.nAvgBytesPerSec = 88200;
  BufferDesc.WaveFormatEx.nBlockAlign     = 4;
  BufferDesc.WaveFormatEx.wBitsPerSample  = 16;
  BufferDesc.WaveFormatEx.cbSize          = 0;