PCM 多声道流数据格式
此示例使用 KSDATAFORMAT_WAVEFORMATEX 结构的扩展版本来描述 PCM 多声道流的数据格式。
DataFormat.FormatSize = sizeof(KSDATAFORMAT) + sizeof(WAVEFORMATEXTENSIBLE);
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_WAVEFORMATEX);
Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
Format.nChannels = 4;
Format.nSamplesPerSec = 44100;
Format.nAvgBytesPerSec = 352800;
Format.nBlockAlign = 8;
Format.wBitsPerSample = 16;
Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
Format.wValidBitsPerSample = 16;
Format.dwChannelMask = KSAUDIO_SPEAKER_SURROUND;
Format.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;