public SoundCardControl()
{
CaptureDevicesCollection captureDevicesCollection = new CaptureDevicesCollection();
if (captureDevicesCollection.Count > 0)
{
this.capture_ = new Microsoft.DirectX.DirectSound.Capture(captureDevicesCollection[0].DriverGuid);
}
else
{
Console.WriteLine("No Capture Device");
}
this.waveFormat_ = this.CreateWaveFormat();
this.notifyEvent_ = new AutoResetEvent(false);
}
/// <summary>
/// 创建捕捉设备对象
/// </summary>
/// <returns>如果创建成功返回true</returns>
private bool CreateCaputerDevice()
{
//首先要玫举可用的捕捉设备
CaptureDevicesCollection capturedev = new CaptureDevicesCollection();
Guid devguid;
if (capturedev.Count > 0)
{
devguid = capturedev[0].DriverGuid;
}
else
{
System.Windows.Forms.MessageBox.Show("当前没有可用于音频捕捉的设备", "系统提示");
return(false);
}
//利用设备GUID来建立一个捕捉设备对象
capture = new Microsoft.DirectX.DirectSound.Capture(devguid);
return(true);
}
/*
* Initializes all the data members.
*/
private void Initialize()
{
try
{
if (device == null)
{
device = new Device();
}
device.SetCooperativeLevel(this, CooperativeLevel.Normal);
CaptureDevicesCollection captureDeviceCollection = new CaptureDevicesCollection();
DeviceInformation deviceInfo = captureDeviceCollection[0];
if (capture == null)
{
capture = new Microsoft.DirectX.DirectSound.Capture(deviceInfo.DriverGuid);
}
short channels = 1; //Stereo.
short bitsPerSample = 16; //16Bit, alternatively use 8Bits.
int samplesPerSecond = 22050; //11KHz use 11025 , 22KHz use 22050, 44KHz use 44100 etc.
//Set up the wave format to be captured.
waveFormat = new WaveFormat();
waveFormat.Channels = channels;
waveFormat.FormatTag = WaveFormatTag.Pcm;
waveFormat.SamplesPerSecond = samplesPerSecond;
waveFormat.BitsPerSample = bitsPerSample;
waveFormat.BlockAlign = (short)(channels * (bitsPerSample / (short)8));
waveFormat.AverageBytesPerSecond = waveFormat.BlockAlign * samplesPerSecond;
captureBufferDescription = new CaptureBufferDescription();
captureBufferDescription.BufferBytes = waveFormat.AverageBytesPerSecond / 5;//approx 200 milliseconds of PCM data.
captureBufferDescription.Format = waveFormat;
playbackBufferDescription = new BufferDescription();
playbackBufferDescription.BufferBytes = waveFormat.AverageBytesPerSecond / 5;
playbackBufferDescription.Format = waveFormat;
playbackBuffer = new SecondaryBuffer(playbackBufferDescription, device);
bufferSize = captureBufferDescription.BufferBytes;
bIsCallActive = false;
nUdpClientFlag = 0;
//Using UDP sockets
if (clientSocket == null)
{
clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
}
if (ourEP == null)
{
ourEP = new IPEndPoint(IPAddress.Any, 1450);
}
//Listen asynchronously on port 1450 for coming messages (Invite, Bye, etc).
clientSocket.Bind(ourEP);
//Receive data from any IP.
if (remoteEP==null)
{
remoteEP = (EndPoint)(new IPEndPoint(IPAddress.Any, 0));
}
byteData = new byte[1024];
//Receive data asynchornously.
clientSocket.BeginReceiveFrom(byteData,
0, byteData.Length,
SocketFlags.None,
ref remoteEP,
new AsyncCallback(OnReceive),
null);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "VoiceChat-Initialize ()", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
