这篇文章主要是一个应用，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<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;
}
} //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; public 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<DebugEventArgs>(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
其中用到的UDP传输类我放在了github上面 地址在我的博客左边的个人介绍里有地址 项目地址 https://github.com/zhujunxxxxx/ZZNetFrame
希望这篇文章能够提供一个思路。
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