C#基于UDP實(shí)現(xiàn)的P2P語音聊天工具

來源：本站原創(chuàng)|時(shí)間：2020-01-10|欄目：C#教程|點(diǎn)擊：次

語音獲取

要想發(fā)送語音信息，首先得獲取語音，這里有幾種方法，一種是使用DirectX的DirectXsound來錄音，我為了簡便使用一個(gè)開源的插件NAudio來實(shí)現(xiàn)語音錄取。在項(xiàng)目中引用NAudio.dll

//------------------錄音相關(guān)----------------------------- 
    private IWaveIn waveIn; 
    private WaveFileWriter writer; 
 
    private void LoadWasapiDevicesCombo() 
    { 
      var deviceEnum = new MMDeviceEnumerator(); 
      var devices = deviceEnum.EnumerateAudioEndPoints(DataFlow.Capture, DeviceState.Active).ToList(); 
      comboBox1.DataSource = devices; 
      comboBox1.DisplayMember = "FriendlyName"; 
    } 
    private void CreateWaveInDevice() 
    { 
 
      waveIn = new WaveIn(); 
      waveIn.WaveFormat = new WaveFormat(8000, 1); 
      waveIn.DataAvailable += OnDataAvailable; 
      waveIn.RecordingStopped += OnRecordingStopped; 
    } 
    void OnDataAvailable(object sender, WaveInEventArgs e) 
    { 
      if (this.InvokeRequired) 
      { 
        this.BeginInvoke(new EventHandler<WaveInEventArgs>(OnDataAvailable), sender, e); 
      } 
      else 
      { 
        writer.Write(e.Buffer, 0, e.BytesRecorded); 
        int secondsRecorded = (int)(writer.Length / writer.WaveFormat.AverageBytesPerSecond); 
        if (secondsRecorded >= 10)//最大10s 
        { 
          StopRecord(); 
        } 
        else 
        { 
          l_sound.Text = secondsRecorded + " s"; 
        } 
      } 
    } 
    void OnRecordingStopped(object sender, StoppedEventArgs e) 
    { 
      if (InvokeRequired) 
      { 
        BeginInvoke(new EventHandler<StoppedEventArgs>(OnRecordingStopped), sender, e); 
      } 
      else 
      { 
        FinalizeWaveFile(); 
      } 
    } 
    void StopRecord() 
    { 
      AllChangeBtn(btn_luyin, true); 
      AllChangeBtn(btn_stop, false); 
      AllChangeBtn(btn_sendsound, true); 
      AllChangeBtn(btn_play, true); 
 
      //btn_luyin.Enabled = true; 
      //btn_stop.Enabled = false; 
      //btn_sendsound.Enabled = true; 
      //btn_play.Enabled = true; 
      if (waveIn != null) 
        waveIn.StopRecording(); 
      //Cleanup(); 
    } 
 private void Cleanup() 
    { 
      if (waveIn != null) 
      { 
        waveIn.Dispose(); 
        waveIn = null; 
      } 
      FinalizeWaveFile(); 
    } 
    private void FinalizeWaveFile() 
    { 
      if (writer != null) 
      { 
        writer.Dispose(); 
        writer = null; 
      } 
    } 
  //開始錄音 
    private void btn_luyin_Click(object sender, EventArgs e) 
    { 
      btn_stop.Enabled = true; 
      btn_luyin.Enabled = false; 
      if (waveIn == null) 
      { 
        CreateWaveInDevice(); 
      } 
      if (File.Exists(soundfile)) 
      { 
        File.Delete(soundfile); 
      } 
 
      writer = new WaveFileWriter(soundfile, waveIn.WaveFormat); 
      waveIn.StartRecording(); 
    }

上面的代碼實(shí)現(xiàn)了錄音，并且寫入文件p2psound_A.wav

語音發(fā)送

獲取到語音后我們要把語音發(fā)送出去

當(dāng)我們錄好音后點(diǎn)擊發(fā)送，這部分相關(guān)代碼是

MsgTranslator tran = null; 
ublic Form1() 
    { 
      InitializeComponent(); 
      LoadWasapiDevicesCombo();//顯示音頻設(shè)備 
 
      Config cfg = SeiClient.GetDefaultConfig(); 
      cfg.Port = 7777; 
      UDPThread udp = new UDPThread(cfg); 
      tran = new MsgTranslator(udp, cfg); 
      tran.MessageReceived += tran_MessageReceived; 
      tran.Debuged += new EventHandler<DebugEventArgs>(tran_Debuged); 
    } 
 private void btn_sendsound_Click(object sender, EventArgs e) 
    { 
      if (t_ip.Text == "") 
      { 
        MessageBox.Show("請輸入ip"); 
        return; 
      } 
      if (t_port.Text == "") 
      { 
        MessageBox.Show("請輸入端口號"); 
        return; 
      } 
      string ip = t_ip.Text; 
      int port = int.Parse(t_port.Text); 
      string nick = t_nick.Text; 
      string msg = "語音消息"; 
 
      IPEndPoint remote = new IPEndPoint(IPAddress.Parse(ip), port); 
      Msg m = new Msg(remote, "zz", nick, Commands.SendMsg, msg, "Come From A"); 
      m.IsRequireReceive = true; 
      m.ExtendMessageBytes = FileContent(soundfile); 
      m.PackageNo = Msg.GetRandomNumber(); 
      m.Type = Consts.MESSAGE_BINARY; 
      tran.Send(m); 
    } 
 private byte[] FileContent(string fileName) 
    { 
      FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); 
      try 
      { 
        byte[] buffur = new byte[fs.Length]; 
        fs.Read(buffur, 0, (int)fs.Length); 
 
        return buffur; 
      } 
      catch (Exception ex) 
      { 
        return null; 
      } 
      finally 
      { 
        if (fs != null) 
        { 
 
          //關(guān)閉資源 
          fs.Close(); 
        } 
      } 
    }

如此一來我們就把產(chǎn)生的語音文件發(fā)送出去了

語音的接收與播放

其實(shí)語音的接收和文本消息的接收沒有什么不同，只不過語音發(fā)送的時(shí)候是以二進(jìn)制發(fā)送的，因此我們在收到語音后就應(yīng)該寫入到一個(gè)文件里面去，接收完成后，播放這段語音就行了。

下面這段代碼主要是把收到的數(shù)據(jù)保存到文件中去，這個(gè)函數(shù)式我的NetFrame里收到消息時(shí)所觸發(fā)的事件，在文章前面提過的那篇文章里

void tran_MessageReceived(object sender, MessageEventArgs e) 
    { 
      Msg msg = e.msg; 
 
      if (msg.Type == Consts.MESSAGE_BINARY) 
      { 
        string m = msg.Type + "->" + msg.UserName + "發(fā)來二進(jìn)制消息!"; 
        AddServerMessage(m); 
        if (File.Exists(recive_soundfile)) 
        { 
          File.Delete(recive_soundfile); 
        } 
        FileStream fs = new FileStream(recive_soundfile, FileMode.Create, FileAccess.Write); 
        fs.Write(msg.ExtendMessageBytes, 0, msg.ExtendMessageBytes.Length); 
        fs.Close(); 
        //play_sound(recive_soundfile); 
        ChangeBtn(true); 
 
      } 
      else 
      { 
        string m = msg.Type + "->" + msg.UserName + "說:" + msg.NormalMsg; 
        AddServerMessage(m); 
      } 
    }

收到語音消息后，我們要進(jìn)行播放，播放時(shí)仍然用剛才那個(gè)插件播放

//--------播放部分---------- 
    private IWavePlayer wavePlayer; 
    private WaveStream reader; 
 
    public void play_sound(string filename) 
    { 
      if (wavePlayer != null) 
      { 
        wavePlayer.Dispose(); 
        wavePlayer = null; 
      } 
      if (reader != null) 
      { 
        reader.Dispose(); 
      } 
      reader = new MediaFoundationReader(filename, new MediaFoundationReader.MediaFoundationReaderSettings() { SingleReaderObject = true }); 
 
      if (wavePlayer == null) 
      { 
 
        wavePlayer = new WaveOut(); 
        wavePlayer.PlaybackStopped += WavePlayerOnPlaybackStopped; 
        wavePlayer.Init(reader); 
      } 
      wavePlayer.Play(); 
    } 
    private void WavePlayerOnPlaybackStopped(object sender, StoppedEventArgs stoppedEventArgs) 
    { 
      if (stoppedEventArgs.Exception != null) 
      { 
        MessageBox.Show(stoppedEventArgs.Exception.Message); 
      } 
      if (wavePlayer != null) 
      { 
        wavePlayer.Stop(); 
      } 
      btn_luyin.Enabled = true; 
    }private void btn_play_Click(object sender, EventArgs e) 
    { 
      btn_luyin.Enabled = false; 
      play_sound(soundfile); 
    }

在上面演示了接收和發(fā)送一段語音消息的界面

技術(shù)總結(jié)

主要用到的技術(shù)就是UDP和NAudio的錄音和播放功能

希望這篇文章能夠給大家提供一個(gè)思路，幫助大家實(shí)現(xiàn)P2P語音聊天工具。

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