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DirectMusic 流数据范围

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此示例使用 KSDATARANGE_MUSIC 结构来描述 DirectMusic 流的数据范围。

  DataRange.FormatSize  = sizeof(KSDATARANGE_MUSIC);
 DataRange.Flags       = 0;
  DataRange.SampleSize  = 0;
  DataRange.Reserved    = 0;
 DataRange.MajorFormat = STATICGUIDOF(KSDATAFORMAT_TYPE_MUSIC);
  DataRange.SubFormat   = STATICGUIDOF(KSDATAFORMAT_SUBTYPE_DIRECTMUSIC);
  DataRange.Specifier   = STATICGUIDOF(KSDATAFORMAT_SPECIFIER_NONE);
  Technology            = STATICGUIDOF(KSMUSIC_TECHNOLOGY_WAVETABLE);
  Channels              = 0;
  Notes                 = 0;
  ChannelMask           = 0xFFFF;