private void showImpulceCharacteristicButton_Click(object sender, EventArgs e)
{
try
{
int n = (int)impulceCharacteristicNNumericUpDown.Value;
double threshold = (double)impulceCharacteristicThresholdNumericUpDown.Value;
var windowType = GetFourierTransformType();
var impCharType = (FirFilterType)Enum.Parse(typeof(FirFilterType), (string)impulseCharacteristicTypeComboBox.SelectedItem);
double[] h = FiniteImpulseResponse.ImpulseCharacteristic(signal.Hz, n, threshold, impCharType, windowType);
var form = new ShowSpectrumForm(h, " Импульсная характеристика", SpectrumType.NotSet, n);
form.Show();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
/// <summary>
/// パラメータを指定して新しい OverSampling クラスのインスタンスを初期化します。
/// </summary>
/// <param name="samplingRate">サンプリング周波数。これはオーバーサンプリング後の周波数となります。</param>
/// <param name="magnification">サンプリング倍率。</param>
/// <param name="stereo">ステレオである場合は true、モノラルである場合は false。</param>
/// <param name="filterSize">フィルタサイズ。</param>
public OverSampling(double samplingRate, int magnification, bool stereo, int filterSize)
{
if (samplingRate <= 0.0)
{
throw new ArgumentOutOfRangeException("samplingRate");
}
if (magnification <= 0)
{
throw new ArgumentOutOfRangeException("magnification");
}
if (filterSize <= 0)
{
throw new ArgumentOutOfRangeException("filterSize");
}
if (filterSize % 2 != 0)
{
throw new ArgumentException();
}
this.samplingRate = samplingRate;
this.magnification = magnification;
this.stereo = stereo;
this.filterSize = filterSize;
this.filter = new SoundFilter(stereo, filterSize);
var filterGenerator = new LowPassFilter()
{
SamplingRate = samplingRate * magnification,
CutoffFrequency = samplingRate / 2 -
FiniteImpulseResponse.GetDelta(samplingRate * magnification, filterSize)
};
double[] impulse = filterGenerator.Generate(filterSize / 2);
Window.Blackman(impulse);
filter.SetFilter(impulse);
}
private void hPFilterButton_Click(object sender, EventArgs e)
{
try
{
int n = (int)hPImpulceCharacteristicNNumericUpDown.Value;
double threshold = (double)hPImpulceCharacteristicThresholdNumericUpDown.Value;
double[] filteredData = FiniteImpulseResponse.FirFilter(signal.Data, signal.Hz, n, threshold, FirFilterType.HighPass);
if (saveToFileCheckBox.Checked)
{
WriteDataToFile(filteredData);
}
var form = new ShowChartForm(filteredData, filePath + " ВЧ фильтр", signal.Type, signal.Hz);
form.Show();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void showPhaseResponseButton_Click(object sender, EventArgs e)
{
Stopwatch watch = new Stopwatch();
try
{
var impCharType = (FirFilterType)Enum.Parse(typeof(FirFilterType), (string)impulseCharacteristicTypeComboBox.SelectedItem);
int n = (int)impulceCharacteristicNNumericUpDown.Value;
double threshold = (double)impulceCharacteristicThresholdNumericUpDown.Value;
watch.Start();
double[] h = FiniteImpulseResponse.ImpulseCharacteristic(signal.Hz, n, threshold, impCharType);
double[] phaseSpec = FiniteImpulseResponse.PhaseResponse(h, signal.Hz);
watch.Stop();
var form = new ShowSpectrumForm(phaseSpec, "ФЧX", SpectrumType.Phase, signal.Hz, watch.ElapsedMilliseconds);
form.Show();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void showFrequencyResponseDButton_Click(object sender, EventArgs e)
{
Stopwatch watch = new Stopwatch();
try
{
int n = (int)impulceCharacteristicNNumericUpDown.Value;
double threshold = (double)impulceCharacteristicThresholdNumericUpDown.Value;
var windowType = GetFourierTransformType();
var impCharType = (FirFilterType)Enum.Parse(typeof(FirFilterType), (string)impulseCharacteristicTypeComboBox.SelectedItem);
watch.Start();
double[] h = FiniteImpulseResponse.ImpulseCharacteristic(signal.Hz, n, threshold, impCharType, windowType);
double[] amplSpec = FiniteImpulseResponse.FrequencyResponse(h, signal.Hz);
watch.Stop();
var form = new ShowSpectrumForm(amplSpec, "АЧX", SpectrumType.AmplitudeDecibels, signal.Hz, watch.ElapsedMilliseconds);
form.Show();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
