private void ExecuteVibrateAnalysis(string param, out string retValue)
{
retValue = "Res=Fail";
string[] parameters = param.Split(' ');
string filename = parameters[0];
int start = Int32.Parse(parameters[1]);
int len = Int32.Parse(parameters[2]);
int divider = Int32.Parse(parameters[3]);
int freqCount = (parameters.Length - 4) / 2;
try
{
using (WaveFile waveFile = new WaveFile(filename))
{
int n = CalcFFTPoints(waveFile.SamplesPerSecond, len);
double[] lData = new double[n];
Complex[] cData;
if (waveFile.Channels == 2)
{
int sampleStartIndex = start * waveFile.SamplesPerSecond / 1000;
int offset = sampleStartIndex * waveFile.BlockAlign;
int count = n * waveFile.BlockAlign;
byte[] data = waveFile.GetData(offset, count);
using (MemoryStream memStream = new MemoryStream(data))
{
using (BinaryReader reader = new BinaryReader(memStream))
{
for (int i = 0; i < n; i++)
{
lData[i] = (double)reader.ReadInt16();
reader.ReadInt16();
}
}
}
}
else
{
int sampleStartIndex = start * waveFile.SamplesPerSecond / 1000;
int offset = sampleStartIndex * waveFile.BlockAlign;
int count = n * waveFile.BlockAlign;
byte[] data = waveFile.GetData(offset, count);
using (MemoryStream memStream = new MemoryStream(data))
{
using (BinaryReader reader = new BinaryReader(memStream))
{
for (int i = 0; i < n; i++)
{
lData[i] = (double)reader.ReadInt16();
}
}
}
}
fft_r2c(lData, out cData);
double[] ddata = new double[cData.Length];
ddata[0] = cData[0].Magnitude / n;
for (int i = 1; i < cData.Length; i++)
{
ddata[i] = cData[i].Magnitude * 2 / n;
}
double freqInterval = (double)waveFile.SamplesPerSecond / n;
double total = 0;
double valid = 0;
for (int i = 0; i < ddata.Length; i++)
{
double freq = i * freqInterval;
bool inRange = false;
for (int j = 0; j < freqCount; j++)
{
int freqOrigin = Int32.Parse(parameters[4 + 2 * j]);
int freqShift = Int32.Parse(parameters[4 + 2 * j + 1]);
double freqLower = freqOrigin - freqShift;
double freqUpper = freqOrigin + freqShift;
if (freqLower <= freq && freq <= freqUpper)
{
inRange = true;
break;
}
}
if (inRange)
{
valid += ddata[i];
}
total += ddata[i];
}
double validRate = valid / total * 100;
double ampl = total / divider / 32.7;
retValue = "Ampl=" + ampl.ToString("F") + ";Noise=" + validRate.ToString("F");
}
}
catch (Exception e)
{
Log.Debug(e.Message, e);
}
}
private void ExecuteAnalysis(string param, out string retValue)
{
string[] parameters = param.Split(' ');
string filename = parameters[0];
int start = Int32.Parse(parameters[1]);
int len = Int32.Parse(parameters[2]);
int baseFreq = Int32.Parse(parameters[3]);
int freqShift = Int32.Parse(parameters[4]);
retValue = "Res=Fail";
try
{
using (WaveFile waveFile = new WaveFile(filename))
{
int n = CalcFFTPoints(waveFile.SamplesPerSecond, len);
if (waveFile.Channels == 2)
{
int sampleStartIndex = start * waveFile.SamplesPerSecond / 1000;
int offset = sampleStartIndex * waveFile.BlockAlign;
int count = n * waveFile.BlockAlign;
byte[] data = waveFile.GetData(offset, count);
using (MemoryStream memStream = new MemoryStream(data))
{
using (BinaryReader reader = new BinaryReader(memStream))
{
double[] lData = new double[n];
double[] rData = new double[n];
for (int i = 0; i < n; i++)
{
lData[i] = (double)reader.ReadInt16();
rData[i] = (double)reader.ReadInt16();
}
Complex[] lcData;
Complex[] rcData;
fft_r2c(lData, out lcData);
fft_r2c(rData, out rcData);
double freq1, freq2;
double ampl1, ampl2;
double thd1, thd2;
double noise1, noise2;
CalcFreqAndAmpl(n, waveFile.SamplesPerSecond, lcData, out freq1, out ampl1);
CalcFreqAndAmpl(n, waveFile.SamplesPerSecond, rcData, out freq2, out ampl2);
CalcThd(n, waveFile.SamplesPerSecond, baseFreq, lcData, out thd1);
CalcThd(n, waveFile.SamplesPerSecond, baseFreq, rcData, out thd2);
CalcNoise(n, waveFile.SamplesPerSecond, baseFreq, freqShift, lcData, out noise1);
CalcNoise(n, waveFile.SamplesPerSecond, baseFreq, freqShift, rcData, out noise2);
retValue = "Freq1=" + freq1.ToString("F") + ";Ampl1=" + ampl1.ToString("F") + ";Thd1=" + thd1.ToString("F") + ";Noise1=" + noise1.ToString("F");
retValue += ";Freq2=" + freq2.ToString("F") + ";Ampl2=" + ampl2.ToString("F") + ";Thd2=" + thd2.ToString("F") + ";Noise2=" + noise2.ToString("F");
}
}
}
else
{
int sampleStartIndex = start * waveFile.SamplesPerSecond / 1000;
int offset = sampleStartIndex * waveFile.BlockAlign;
int count = n * waveFile.BlockAlign;
byte[] data = waveFile.GetData(offset, count);
using (MemoryStream memStream = new MemoryStream(data))
{
using (BinaryReader reader = new BinaryReader(memStream))
{
double[] lData = new double[n];
for (int i = 0; i < n; i++)
{
lData[i] = (double)reader.ReadInt16();
}
Complex[] lcData;
fft_r2c(lData, out lcData);
double freq1;
double ampl1;
double thd1;
double noise1;
CalcFreqAndAmpl(n, waveFile.SamplesPerSecond, lcData, out freq1, out ampl1);
CalcThd(n, waveFile.SamplesPerSecond, baseFreq, lcData, out thd1);
CalcNoise(n, waveFile.SamplesPerSecond, baseFreq, freqShift, lcData, out noise1);
retValue = "Freq1=" + freq1.ToString("F") + ";Ampl1=" + ampl1.ToString("F") + ";Thd1=" + thd1.ToString("F") + ";Noise1=" + noise1.ToString("F");
}
}
}
}
}
catch (Exception e)
{
Log.Debug(e.Message, e);
}
}
