public void OnAudioDataAvailable(object sender, WaveInEventArgs e)
{
if (e.BytesRecorded < 2000)
{
return;
}
int bytesPerSample = Zybo.Fft.WaveIn.WaveFormat.BitsPerSample / 8;
int samplesRecorded = e.BytesRecorded / bytesPerSample;
Int16[] lastBuffer = new Int16[samplesRecorded];
for (int i = 0; i < samplesRecorded; i++)
{
int index = i * bytesPerSample;
//if(e.Buffer[index] != 0xFF )
lastBuffer[i] = BitConverter.ToInt16(e.Buffer, index);
}
int lastBufferAmplitude = lastBuffer.Max() - lastBuffer.Min();
lastBufferAmplitude = lastBufferAmplitude > 10000 ? 0 : lastBufferAmplitude;
int max = lastBuffer.Max();
int min = lastBuffer.Min();
double t = this.watch.ElapsedMilliseconds * 0.001;
if ((AudioSignalModel.Series.First() as LineSeries).Points.Count > maxAudioPoints)
{
(AudioSignalModel.Series.First() as LineSeries).Points.RemoveAt(0);
}
(AudioSignalModel.Series.First() as LineSeries).Points.Add(new DataPoint(t, lastBufferAmplitude));
AudioSignalModel.InvalidatePlot(true);
}
private void OnDataAvailable(object sender, NAudio.Wave.WaveInEventArgs args)
{
int bytesPerSample = wvin.WaveFormat.BitsPerSample / 8;
int samplesRecorded = args.BytesRecorded / bytesPerSample;
Int16[] lastBuffer = new Int16[samplesRecorded];
for (int i = 0; i < samplesRecorded; i++)
{
lastBuffer[i] = BitConverter.ToInt16(args.Buffer, i * bytesPerSample);
}
int lastBufferAmplitude = lastBuffer.Max() - lastBuffer.Min();
double amplitude = (double)lastBufferAmplitude / Math.Pow(2, wvin.WaveFormat.BitsPerSample);
if (amplitude > peakAmplitudeSeen)
{
peakAmplitudeSeen = amplitude;
}
amplitude = amplitude / peakAmplitudeSeen * 100;
buffersRead += 1;
// TODO: make this sane
ScottPlot.PlottableAxLine axLine = (ScottPlot.PlottableAxLine)scottPlotUC1.plt.GetPlottables()[1];
axLine.position = (buffersRead % amplitudes.Length) * 20.0 / 1000.0;
Console.WriteLine(string.Format("Buffer {0:000} amplitude: {1:00.00}%", buffersRead, amplitude));
PlotAddPoint(amplitude);
}
/// <summary>
/// 根据指定集合的指定值属性计算颜色分布：
/// start,end：起始颜色，建议颜色：Red-DarkKhaki
/// property：需要计算的属性名称
/// attach：附加到Dynamic上的动态属性名称
/// attachColor,true:附加Color，false：附加SolidColorBrush
/// </summary>
public static void ColorDistributeAnalysis <TItem>(List <TItem> items, Color start, Color end, string property, string attach, bool attachColor = true)
where TItem : IDynamicEnable
{
if (items == null || items.Count <= 0)
{
return;
}
//起始颜色
Int16[] s = new Int16[]
{
start.R.ToString().ToInt16(),
start.G.ToString().ToInt16(),
start.B.ToString().ToInt16()
};
Int16[] e = new Int16[]
{
end.R.ToString().ToInt16(),
end.G.ToString().ToInt16(),
end.B.ToString().ToInt16(),
};
//最大段数
var maxStep = Math.Abs(s.Max() - e.Min()) / 2;
//数值
List <double> values = new List <double>();
items.ForEach(item =>
{
if (item is DynamicX)
{
values.Add((item as DynamicX).Get(property).ToSafeString().ToSafeDouble());
}
else
{
var v = System.Utility.Helper.Reflection.GetObjectValue <TItem>(item, property).ToSafeString().ToSafeDouble();
values.Add(v);
}
});
var max = values.Max();
var min = values.Min();
var sub = max - min;
//设置颜色
SetStepColor(items, ref start, attach, attachColor, s, e, maxStep, values, min, sub);
}
private void SetDataAmplitude(WaveInEventArgs args)
{
int bytesPerSample = _wi.WaveFormat.BitsPerSample / 8;
int samplesRecorded = args.BytesRecorded / bytesPerSample;
Int16[] lastBuffer = new Int16[samplesRecorded];
for (int i = 0; i < samplesRecorded; i++)
{
lastBuffer[i] = BitConverter.ToInt16(args.Buffer, i * bytesPerSample);
}
int lastBufferAmplitude = lastBuffer.Max() - lastBuffer.Min();
double amplitude = (double)lastBufferAmplitude / Math.Pow(2, _wi.WaveFormat.BitsPerSample);
if (amplitude > peakAmplitudeSeen)
{
peakAmplitudeSeen = amplitude;
}
amplitude = amplitude / peakAmplitudeSeen * 100;
//_spectrumdata.Clear();
if (_spectrumdata.Count >= NumberOfLines)
{
_spectrumdata.RemoveAt(0);
}
double regleDe3 = amplitude * 255 / 100;
int y = Convert.ToInt32(regleDe3);
if (y > 255)
{
y = 255;
}
if (y < 0)
{
y = 0;
}
_spectrumdata.Add((byte)y);
SpectrumVisualizer.Set(_spectrumdata.ToArray());
}
