基于C#实现语音预处理

WaveSampleRate sr = WaveSampleRate.S16k;
int channelCount = 1;

//创建语音预处理器，开启降噪、自动增益、静音检测
this.voicePreprocessor = CapturerFactory.CreateVoicePreprocessor(sr, channelCount, true ,true);
//创建麦克风采集器
this.microphoneCapturer = CapturerFactory.CreateMicrophoneCapturer(int.Parse(this.textBox_mic.Text), sr);
this.microphoneCapturer.AudioCaptured += new ESBasic.CbGeneric<byte[]>(microphoneCapturer_AudioCaptured);
//创建声音播放器
this.audioPlayer = PlayerFactory.CreateAudioPlayer(int.Parse(this.textBox_speaker.Text), (int)sr, channelCount, 16, 2);                

this.microphoneCapturer.Start();

void microphoneCapturer_AudioCaptured(byte[] audioData)
{
    if (this.checkBox_enabled.Checked)
    {
        //麦克风每次采集20ms数据，降噪器每次处理10ms数据。
        byte[] frame10ms1 = new byte[audioData.Length / 2];
        byte[] frame10ms2 = new byte[audioData.Length / 2];
        Buffer.BlockCopy(audioData, 0, frame10ms1, 0, frame10ms1.Length);
        Buffer.BlockCopy(audioData, frame10ms1.Length, frame10ms2, 0, frame10ms2.Length);
        this.HandleData(frame10ms1);
        this.HandleData(frame10ms2);
        return;
    }

    this.audioPlayer.Play(audioData);
}

private void HandleData(byte[] frame10ms)
{
    byte[] res = this.voicePreprocessor.Process(frame10ms);            
    if (res == null) //静音帧
    {
        ++this.silenceFrameCountTotal;
        this.audioPlayer.Play(this.voicePreprocessor.SlienceFrame);
    }
    else
    {
        this.audioPlayer.Play(res);
    }
}

private volatile int silenceFrameCountTotal = 0;
private volatile int silenceFrameCountPre = 0;
private void timer1_Tick(object sender, EventArgs e)
{
    int delt = this.silenceFrameCountTotal - this.silenceFrameCountPre;
    this.silenceFrameCountPre = this.silenceFrameCountTotal;
    //显示上一秒静音帧数量。
    this.label_silenceFrameCount.Text = delt.ToString();
}