// 获得音频播放设备格式信息
	CComHeapPtr<WAVEFORMATEX> pDeviceFormat;
	pAudioClient->GetMixFormat(&pDeviceFormat);

	constexpr int REFTIMES_PER_SEC = 10000000;      // 1 reference_time = 100ns
	constexpr int REFTIMES_PER_MILLISEC = 10000;

	// Microsoft
	if (pDeviceFormat->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
		printf("WAV format : Microsoft \n");
		WAVEFORMATEX* pWavFormatEx = pDeviceFormat;
		PWAVEFORMATEXTENSIBLE pWavFormatExtensible = reinterpret_cast<PWAVEFORMATEXTENSIBLE>(pWavFormatEx);

		switch (pDeviceFormat->wFormatTag)
		{
			case WAVE_FORMAT_IEEE_FLOAT:
			{
				pWavFormatEx->wBitsPerSample = 16;
				pWavFormatEx->nSamplesPerSec = 48000;
				pWavFormatEx->nChannels = 2;
				pWavFormatEx->wFormatTag = WAVE_FORMAT_PCM;
				pWavFormatEx->nBlockAlign = pWavFormatEx->nChannels * pWavFormatEx->wBitsPerSample / 8;
				pWavFormatEx->nAvgBytesPerSec = pWavFormatEx->nBlockAlign * pWavFormatEx->nSamplesPerSec;

				break;
			}
			case WAVE_FORMAT_EXTENSIBLE:
			{
				// naked scope for case-local variable
				if (IsEqualGUID(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, pWavFormatExtensible->SubFormat))
				{
					pWavFormatExtensible->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
					pWavFormatExtensible->Samples.wValidBitsPerSample = 16;
					pWavFormatEx->wBitsPerSample = 16;
					pWavFormatEx->nSamplesPerSec = 48000;
					pWavFormatEx->nChannels = 2;
					pWavFormatEx->wFormatTag = WAVE_FORMAT_PCM;
					pWavFormatEx->nBlockAlign = pWavFormatEx->nChannels * pWavFormatEx->wBitsPerSample / 8;
					pWavFormatEx->nAvgBytesPerSec = pWavFormatEx->nBlockAlign * pWavFormatEx->nSamplesPerSec;
				}
				else
				{
					return false;
				}
				break;
			}
		}
	}