那里面的代码都是托管的，而且是打电话时实现免提。



如果我是要实现点对点音频流对话功能（如VOIP），要自已实现流播放，播放的声音要在听筒出来，应该什么做？



网上我找到的相关代码：

//发送消息打开Receiver

waveOutMessage(0,0x452,0,0);



DWORD dwChannels = 1; // default to mono

DWORD dwBitsPerSample = 16; // default to 16-bit samples

DWORD dwSampleRate = 11025; // default to 11.025KHz sample rate

DWORD dwDeviceId = WAVE_MAPPER; // capture from any available device



// set up the wave format structure

WAVEFORMATEX wfx;

wfx.cbSize = 0;

wfx.wFormatTag = WAVE_FORMAT_PCM;

wfx.wBitsPerSample = (WORD) dwBitsPerSample;

wfx.nSamplesPerSec = dwSampleRate;

wfx.nChannels = (WORD) dwChannels;

wfx.nBlockAlign = wfx.nChannels * wfx.wBitsPerSample / 8;

wfx.nAvgBytesPerSec = wfx.nBlockAlign * wfx.nSamplesPerSec;



MMRESULT mr = waveOutOpen(&phwo, dwDeviceId, &wfx, NULL , NULL, CALLBACK_NULL);



然后用Playsound就行了。





这里我用waveOutWrite，没用PlaySound来写入音频数据，不过还是没有作用。