/// <summary>
/// 音频数据更新
/// </summary>
/// <param name="args"></param>
private void AudioInput_DataGenerated(DataGeneratedEventArgs args)
{
double[][] samples = args.Samples;
if (samples.Length == 0)
{
return;
}
//源波
double[] souceWave = samples[0];
List <double> sampledData = new List <double>();
//采样后的信号
double[] sampledWave = new double[souceWave.Count()];
int impact = (int)(_samplingFrequency / Param.secSamplingFrequency);
for (int i = 0; i < souceWave.Count(); i++)
{
if (i % impact == 0)
{
sampledWave[i] = souceWave[i];
sampledData.Add(souceWave[i]);
}
else
{
sampledWave[i] = 0.0;
}
}
//为示波器输入数据
if (m_WaveformMonitor != null)
{
double[][] waveData = new double[_seriesNames.Count()][];
waveData[0] = souceWave;
waveData[1] = sampledWave;
m_WaveformMonitor.FeedData(waveData);
}
List <double> pcmCode = new List <double>();
foreach (var item in sampledData)
{
int[] codes = PCMCaculator.PCM_Encode(item);
foreach (var code in codes)
{
pcmCode.Add(code);
}
}
//为示波器输入数据
if (m_CodeMonitor != null)
{
double[][] Data = new double[1][];
Data[0] = pcmCode.ToArray();
m_CodeMonitor.FeedData(Data);
}
}
/// <summary>
/// 音频数据更新
/// </summary>
/// <param name="args"></param>
private void AudioInput_DataGenerated(DataGeneratedEventArgs args)
{
double[][] samples = args.Samples;
if (samples.Length == 0)
{
return;
}
//源波
double[] souceWave = samples[0];
//生成载波
double MaxAmplitude = 10000;
double[] carryWave = WaveGenerator.Sine(samples[0].Count(),
(int)MaxAmplitude, _samplingFrequency, Param.moudulateFrequency);
//生成调制波
double[] modulatedWava = new double[souceWave.Count()];
for (int i = 0; i < souceWave.Count(); i++)
{
double signal = souceWave[i] * carryWave[i];
//每个信号除以载波幅度以约束其值范围
signal /= MaxAmplitude;
modulatedWava[i] = signal;
}
//为示波器输入数据
if (m_aWaveformMonitors != null)
{
double[][] waveData = new double[_seriesNames.Count()][];
waveData[0] = souceWave;
waveData[1] = carryWave;
waveData[2] = modulatedWava;
waveData[3] = samples[0];
m_aWaveformMonitors.FeedData(waveData);
}
//Feed multi-channel data to FFT calculator. If it gives a calculated result, set multi-channel result in the selected FFT chart
if (m_fftCalculator != null)
{
double[][][] yValues;
double[][][] xValues;
double[][] data = new double[2][];
data[0] = souceWave;
data[1] = modulatedWava;
if (m_fftCalculator.FeedDataAndCalculate(data, out xValues, out yValues))
{
int rowCount = xValues.Length;
m_aSpectrograms2D_source.SetData(yValues, 0, rowCount);
m_AreaSpectrum_souce.SetData(xValues[0][0], yValues[0][0]);
m_aSpectrograms2D_signal.SetData(yValues, 1, rowCount);
m_AreaSpectrum_signal.SetData(xValues[0][1], yValues[0][1]);
}
}
//TODO
//base.DataGenerated(samples[0].Length);
}