C#基于UDP实现的P2P语音聊天工具

今天就跟大家聊聊有关C#基于UDP实现的P2P语音聊天工具，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。

主要是一个应用，使用udp传送语音和文本等信息。在这个系统中没有服务端和客户端，相互通讯都是直接相互联系的。能够很好的实现效果。

语音获取

要想发送语音信息，首先得获取语音，这里有几种方法，一种是使用DirectX的DirectXsound来录音，我为了简便使用一个开源的插件NAudio来实现语音录取。 在项目中引用NAudio.dll

//------------------录音相关-----------------------------         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(OnDataAvailable), sender, e);             }             else             {                 writer.Write(e.Buffer, 0, e.BytesRecorded);                 int secondsRecorded = (int)(writer.Length / writer.WaveFormat.AverageBytesPerSecond);                 if (secondsRecorded >= 10)//***10s                 {                     StopRecord();                 }                 else                 {                     l_sound.Text = secondsRecorded + " s";                 }             }         }         void OnRecordingStopped(object sender, StoppedEventArgs e)         {             if (InvokeRequired)             {                 BeginInvoke(new EventHandler(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;             }         }    //开始录音         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();         }

上面的代码实现了录音，并且写入文件p2psound_A.wav

语音发送

获取到语音后我们要把语音发送出去

当我们录好音后点击发送，这部分相关代码是

MsgTranslator tran = null; ublic Form1()        {            InitializeComponent();            LoadWasapiDevicesCombo();//显示音频设备             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(tran_Debuged);        }  private void btn_sendsound_Click(object sender, EventArgs e)        {            if (t_ip.Text == "")            {                MessageBox.Show("请输入ip");                return;            }            if (t_port.Text == "")            {                MessageBox.Show("请输入端口号");                return;            }            string ip = t_ip.Text;            int port = int.Parse(t_port.Text);            string nick = t_nick.Text;            string msg = "语音消息";             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)                {                     //关闭资源                    fs.Close();                }            }        }

如此一来我们就把产生的语音文件发送出去了

语音的接收与播放

其实语音的接收和文本消息的接收没有什么不同，只不过语音发送的时候是以二进制发送的，因此我们在收到语音后 就应该写入到一个文件里面去，接收完成后，播放这段语音就行了。

下面这段代码主要是把收到的数据保存到文件中去，这个函数式我的NetFrame里收到消息时所触发的事件，在文章前面提过的那篇文章里

void tran_MessageReceived(object sender, MessageEventArgs e)         {             Msg msg = e.msg;              if (msg.Type == Consts.MESSAGE_BINARY)             {                 string m = msg.Type + "->" + msg.UserName + "发来二进制消息!";                 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 + "说:" + msg.NormalMsg;                 AddServerMessage(m);             }         }

收到语音消息后，我们要进行播放，播放时仍然用刚才那个插件播放

//--------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发送一段语音消息的界面

技术总结

主要用到的技术就是UDP和NAudio的录音和播放功能

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