public void CLearDataAvailableEvent()
{
if (DataAvailable == null)
{
return;
}
Delegate[] dels = DataAvailable.GetInvocationList();
foreach (Delegate del in dels)
{
object delObj = del.GetType().GetProperty("Method").GetValue(del, null);
string funcName = (string)delObj.GetType().GetProperty("Name").GetValue(delObj, null);////方法名
Console.WriteLine(funcName);
DataAvailable -= del as EventHandler <InfraredSensorDataEventArgs>;
}
}
public void OnDataAvailable(object sender, WaveInEventArgs e)
{
_waitingForData = false;
var outPos = 0;
var floatIndex = 0;
try
{
CheckBuffers(e.BytesRecorded);
// Note: Data ratio of stereo 32-bit 48KHz to mono 16-bit 8KHz is 24:1
//var bytesReceived = e.BytesRecorded;
//var outputSize = bytesReceived / 24;
//var outArray = new byte[(int)Math.Ceiling(outputSize / 2d) * 2];
// Note: Data ratio of stereo 32-bit 48KHz to mono 8-bit 8KHz is 48:1
var bytesReceived = e.BytesRecorded;
var outputSize = bytesReceived / 48;
var outArray = new byte[(int)Math.Ceiling(outputSize / 2d) * 2];
// 48KHz
// 32Kbps
//var i = 0;
//var j = 0;
//var k = 0;
//var o = new float[e.BytesRecorded / 8];
//while (i < e.BytesRecorded)
//{
// var left = BitConverter.ToSingle(e.Buffer, i);
// var right = BitConverter.ToSingle(e.Buffer, i + 4);
// var mono = (left + right) * 0.5F;
// o[j] = mono;
// i = i + 8;
// j = j + 1;
//}
//var result = Downsample(o);
//for (k = 0; k < result.Length; k++)
//{
// outArray[k] = MuLawEncoder.LinearToMuLawSample((short) (result[k] * MaxValue));
//}
// #1 Resample to 8KHz
var waveBuffer = Downsample(e);
while (floatIndex < waveBuffer.FloatBufferCount)
{
// #2 Convert to Mono
var leftSample = waveBuffer.FloatBuffer[floatIndex++];
var rightSample = waveBuffer.FloatBuffer[floatIndex++];
var monoSample = ConvertToMono(leftSample, rightSample);
// #3 Convert to short and then mu-law
outArray[outPos++] = MuLawEncoder.LinearToMuLawSample((short)(monoSample * MaxValue));
}
if (DataAvailable != null)
{
foreach (var delDelegate in DataAvailable.GetInvocationList())
{
delDelegate.DynamicInvoke(this, new DataEventArgs(outArray, outPos)); //24));
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
Console.WriteLine($"{nameof(outPos)}: {outPos}, {nameof(floatIndex)}: {floatIndex}");
throw;
}
_waitingForData = true;
}