public void Read(NetworkStream stream)
{
WindowId = (byte)stream.ReadByte();
WindowType = (WindowTypes)stream.ReadByte();
Title = StreamHelper.ReadString(stream);
Slots = (byte)stream.ReadByte();
}
//===================================================================
// イベントハンドラ
//===================================================================
//-------------------------------------------------------------------
// *Changed/Checked/Unchecked以外
//-------------------------------------------------------------------
/// プロファイルを更新
private void ModifyProfile(WindowTypes nextWindowType, UIntPtr nextTargetWindow)
{
App.Profile.Open();
// Window
switch (nextWindowType) {
case WindowTypes.Normal: {
App.Profile.Current.SetWindow(nextTargetWindow);
break;
}
case WindowTypes.DXGI: {
App.Profile.Current.SetWindowToDXGI();
break;
}
case WindowTypes.Desktop: {
App.Profile.Current.SetWindowToDesktop();
break;
}
default: Debug.Fail("switch"); throw new System.ArgumentException();
}
App.Profile.Current.Fit = true;
App.Profile.Current.ClearBackupParameters();
App.Profile.Close();
//-----------------------------------------------------------------
// Notify self
this.OnCurrentLayoutElementChanged();
// Notify other controls
Commands.AreaChanged.Execute(null, this);
//-----------------------------------------------------------------
}
/// <summary>
/// Main constructor
/// </summary>
/// <param name="samplingRate"></param>
/// <param name="frameDuration">In seconds</param>
/// <param name="hopDuration">In seconds</param>
/// <param name="modulationFftSize">In samples</param>
/// <param name="modulationHopSize">In samples</param>
/// <param name="fftSize">In samples</param>
/// <param name="featuregram"></param>
/// <param name="filterbank"></param>
/// <param name="preEmphasis"></param>
/// <param name="window"></param>
public AmsExtractor(int samplingRate,
double frameDuration = 0.0256 /*sec*/,
double hopDuration = 0.010 /*sec*/,
int modulationFftSize = 64,
int modulationHopSize = 4,
int fftSize = 0,
IEnumerable <float[]> featuregram = null,
float[][] filterbank = null,
double preEmphasis = 0.0,
WindowTypes window = WindowTypes.Rectangular)
: base(samplingRate, frameDuration, hopDuration)
{
_modulationFftSize = modulationFftSize;
_modulationHopSize = modulationHopSize;
_modulationFft = new Fft(_modulationFftSize);
_featuregram = featuregram?.ToArray();
if (featuregram != null)
{
_featureCount = _featuregram[0].Length * (_modulationFftSize / 2 + 1);
}
else
{
if (_filterbank == null)
{
_fftSize = fftSize > FrameSize ? fftSize : MathUtils.NextPowerOfTwo(FrameSize);
_filterbank = FilterBanks.Triangular(_fftSize, samplingRate,
FilterBanks.MelBands(12, _fftSize, samplingRate, 100, 3200));
}
else
{
_filterbank = filterbank;
_fftSize = 2 * (filterbank[0].Length - 1);
}
_fft = new Fft(_fftSize);
_featureCount = _filterbank.Length * (_modulationFftSize / 2 + 1);
_window = window;
if (_window != WindowTypes.Rectangular)
{
_windowSamples = Window.OfType(_window, FrameSize);
}
_spectrum = new float[_fftSize / 2 + 1];
_filteredSpectrum = new float[_filterbank.Length];
_block = new float[_fftSize];
_zeroblock = new float[_fftSize];
}
_preEmphasis = (float)preEmphasis;
_modBlock = new float[_modulationFftSize];
_zeroModblock = new float[_modulationFftSize];
_modSpectrum = new float[_modulationFftSize / 2 + 1];
// feature descriptions
int length;
if (_featuregram != null)
{
length = _featuregram[0].Length;
}
else
{
length = _filterbank.Length;
}
_featureDescriptions = new List <string>();
var modulationSamplingRate = (float)samplingRate / HopSize;
var resolution = modulationSamplingRate / _modulationFftSize;
for (var fi = 0; fi < length; fi++)
{
for (var fj = 0; fj <= _modulationFftSize / 2; fj++)
{
_featureDescriptions.Add(string.Format("band_{0}_mf_{1:F2}_Hz", fi + 1, fj * resolution));
}
}
}
//-------------------------------------------------------------------
/// レイアウトタイプに合わせて適切なBrush/Penを設定する
private void GetWindowTypesBrushes(
WindowTypes currentWindowType, WindowTypes nextWindowType,
out Brush border, out Brush background)
{
switch (nextWindowType) {
case WindowTypes.Normal: {
// 更に現在のTypeによって色を分ける
switch (currentWindowType) {
case WindowTypes.DXGI: {
border = BrushesAndPens.CurrentDXGIBrush;
background = BrushesAndPens.TransparentDXGIBrush;
break;
}
case WindowTypes.Desktop: {
border = BrushesAndPens.CurrentDesktopBrush;
background = BrushesAndPens.TransparentDesktopBrush;
break;
}
case WindowTypes.Normal: {
border = BrushesAndPens.CurrentNormalBrush;
background = BrushesAndPens.TransparentNormalBrush;
break;
}
default: Debug.Fail("switch"); throw new System.ArgumentException();
}
break;
}
case WindowTypes.DXGI: {
border = BrushesAndPens.CurrentDXGIBrush;
background = BrushesAndPens.TransparentDXGIBrush;
break;
}
case WindowTypes.Desktop: {
border = BrushesAndPens.CurrentDesktopBrush;
background = BrushesAndPens.TransparentDesktopBrush;
break;
}
default: Debug.Fail("switch"); throw new System.ArgumentException();
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="samplingRate"></param>
/// <param name="featureList"></param>
/// <param name="frameDuration"></param>
/// <param name="hopDuration"></param>
/// <param name="fftSize"></param>
/// <param name="parameters"></param>
public SpectralFeaturesExtractor(int samplingRate,
string featureList,
double frameDuration = 0.0256 /*sec*/,
double hopDuration = 0.010 /*sec*/,
int fftSize = 0,
float[] frequencies = null,
WindowTypes window = WindowTypes.Hamming,
IReadOnlyDictionary <string, object> parameters = null)
: base(samplingRate, frameDuration, hopDuration)
{
if (featureList == "all" || featureList == "full")
{
featureList = FeatureSet;
}
var features = featureList.Split(',', '+', '-', ';', ':')
.Select(f => f.Trim().ToLower());
_extractors = features.Select <string, Func <float[], float[], float> >(feature =>
{
switch (feature)
{
case "sc":
case "centroid":
return(Spectral.Centroid);
case "ss":
case "spread":
return(Spectral.Spread);
case "sfm":
case "flatness":
if (parameters?.ContainsKey("minLevel") ?? false)
{
var minLevel = (float)parameters["minLevel"];
return((spectrum, freqs) => Spectral.Flatness(spectrum, minLevel));
}
else
{
return((spectrum, freqs) => Spectral.Flatness(spectrum));
}
case "sn":
case "noiseness":
if (parameters?.ContainsKey("noiseFrequency") ?? false)
{
var noiseFrequency = (float)parameters["noiseFrequency"];
return((spectrum, freqs) => Spectral.Noiseness(spectrum, freqs, noiseFrequency));
}
else
{
return((spectrum, freqs) => Spectral.Noiseness(spectrum, freqs));
}
case "rolloff":
if (parameters?.ContainsKey("rolloffPercent") ?? false)
{
var rolloffPercent = (float)parameters["rolloffPercent"];
return((spectrum, freqs) => Spectral.Rolloff(spectrum, freqs, rolloffPercent));
}
else
{
return((spectrum, freqs) => Spectral.Rolloff(spectrum, freqs));
}
case "crest":
return((spectrum, freqs) => Spectral.Crest(spectrum));
case "entropy":
case "ent":
return((spectrum, freqs) => Spectral.Entropy(spectrum));
case "sd":
case "decrease":
return((spectrum, freqs) => Spectral.Decrease(spectrum));
case "c1":
case "c2":
case "c3":
case "c4":
case "c5":
case "c6":
return((spectrum, freqs) => Spectral.Contrast(spectrum, freqs, int.Parse(feature.Substring(1))));
default:
return((spectrum, freqs) => 0);
}
}).ToList();
FeatureDescriptions = features.ToList();
_fftSize = fftSize > FrameSize ? fftSize : MathUtils.NextPowerOfTwo(FrameSize);
_fft = new Fft(_fftSize);
_window = window;
if (_window != WindowTypes.Rectangular)
{
_windowSamples = Window.OfType(_window, FrameSize);
}
var resolution = (float)samplingRate / _fftSize;
if (frequencies == null)
{
_frequencies = Enumerable.Range(0, _fftSize / 2 + 1)
.Select(f => f * resolution)
.ToArray();
}
else if (frequencies.Length == _fftSize / 2 + 1)
{
_frequencies = frequencies;
}
else
{
_frequencies = new float[frequencies.Length + 1];
frequencies.FastCopyTo(_frequencies, frequencies.Length, 0, 1);
_mappedSpectrum = new float[_frequencies.Length];
_frequencyPositions = new int[_frequencies.Length];
for (var i = 1; i < _frequencies.Length; i++)
{
_frequencyPositions[i] = (int)(_frequencies[i] / resolution) + 1;
}
}
_parameters = parameters;
// reserve memory for reusable blocks
_spectrum = new float[_fftSize / 2 + 1]; // buffer for magnitude spectrum
_block = new float[_fftSize]; // buffer for currently processed block
_zeroblock = new float[_fftSize]; // just a buffer of zeros for quick memset
}
/// WindowタイプをDesktopにする
public void SetWindowToDesktop()
{
this.additionalData.WindowType = WindowTypes.Desktop;
this.rawData.Window = User32.GetDesktopWindow();
this.additionalData.WindowCaption = "(Desktop)";
}
public override bool ButtonClicked(string name, SegmentEntity targetEntity)
{
if (name == "nextnetwork") // Increment network count
{
this.SelectedNetwork++;
if (this.SelectedNetwork >= fcm.Networks.Count)
{
this.SelectedNetwork = 0;
}
NetworkSync.NetworkStatus = null;
this.manager.RedrawWindow();
return(true);
}
else if (name == "prevnetwork") // Decrement network count
{
this.SelectedNetwork--;
if (this.SelectedNetwork < 0)
{
this.SelectedNetwork = fcm.Networks.Count - 1;
}
NetworkSync.NetworkStatus = null;
this.manager.RedrawWindow();
return(true);
}
else if (name == "nextstorage") // Increment storage count
{
this.SelectedStorage++;
if (this.SelectedStorage >= fcm.StationInventories.Count)
{
this.SelectedStorage = 0;
}
this.manager.RedrawWindow();
return(true);
}
else if (name == "prevstorage") // Decrement storage count
{
this.SelectedStorage--;
if (this.SelectedStorage < 0)
{
this.SelectedStorage = fcm.StationInventories.Count - 1;
}
this.manager.RedrawWindow();
return(true);
}
else if (name == "allnetworks")
{
if (this.CurrentWindow == WindowTypes.GlobalInventory)
{
this.CurrentWindow = WindowTypes.NetworkStatus;
}
else
{
this.CurrentWindow = WindowTypes.GlobalInventory;
}
this.manager.RedrawWindow();
return(true);
}
else if (name == "tracknetworks")
{
if (this.CurrentWindow == WindowTypes.TrackNetworks)
{
this.CurrentWindow = WindowTypes.NetworkStatus;
}
else
{
this.CurrentWindow = WindowTypes.TrackNetworks;
}
this.manager.RedrawWindow();
return(true);
}
else if (name == "selnetwork")
{
if (this.CurrentWindow == WindowTypes.NetworkSelection)
{
this.CurrentWindow = WindowTypes.NetworkStatus;
}
else
{
this.CurrentWindow = WindowTypes.NetworkSelection;
}
this.manager.RedrawWindow();
return(true);
}
else if (name == "viewinventory")
{
if (this.CurrentWindow == WindowTypes.StorageInventory)
{
this.CurrentWindow = WindowTypes.NetworkStatus;
}
else
{
this.CurrentWindow = WindowTypes.StorageInventory;
}
this.manager.RedrawWindow();
return(true);
}
else if (name.Contains("networknum"))
{
int slotNum = -1;
int.TryParse(name.Replace("networknum", ""), out slotNum); //Get slot name as number
if (slotNum > -1) // valid slot
{
this.SelectedNetwork = slotNum;
NetworkSync.NetworkStatus = null;
this.CurrentWindow = WindowTypes.NetworkStatus;
this.manager.RedrawWindow();
return(true);
}
}
else if (name.Contains("trackicon"))
{
int slotNum = -1;
int.TryParse(name.Replace("trackicon", ""), out slotNum); //Get slot name as number
if (slotNum > -1) // valid slot
{
if (this.TrackNetworkDisplay == slotNum)
{
this.TrackNetworkDisplay = -1;
}
else
{
this.TrackNetworkDisplay = slotNum;
}
this.StationDisplay = -1;
this.CartDisplay = -1;
NetworkSync.TrackNetworks = null;
this.manager.RedrawWindow();
return(true);
}
}
else if (name.Contains("stationicon"))
{
int slotNum = -1;
int.TryParse(name.Replace("stationicon", ""), out slotNum); //Get slot name as number
if (slotNum > -1) // valid slot
{
if (this.StationDisplay == slotNum)
{
this.StationDisplay = -1;
}
else
{
this.StationDisplay = slotNum;
}
this.CartDisplay = -1;
this.manager.ClearWindow();
NetworkSync.TrackNetworks = null;
this.manager.RedrawWindow();
return(true);
}
}
else if (name.Contains("carticon"))
{
int slotNum = -1;
int.TryParse(name.Replace("carticon", ""), out slotNum); //Get slot name as number
if (slotNum > -1) // valid slot
{
if (this.CartDisplay == slotNum)
{
this.CartDisplay = -1;
}
else
{
this.CartDisplay = slotNum;
}
NetworkSync.TrackNetworks = null;
this.manager.RedrawWindow();
return(true);
}
}
else if (name == "addcart")
{
int amount = 1;
if (Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift))
{
amount = 10;
}
FreightCartWindow.SetCartAssignment(this.CurrentStation, this.CurrentStation.AssignedCarts + amount);
this.manager.UpdateLabel("stationcarts" + this.StationDisplay.ToString(), "Carts: " + this.CurrentStation.AvailableCarts.ToString() + " / " + this.CurrentStation.AssignedCarts.ToString(), this.CurrentStation.AvailableCarts > this.CurrentStation.AssignedCarts ? Color.green : this.CurrentStation.AvailableCarts == this.CurrentStation.AssignedCarts ? Color.white : Color.red);
return(true);
}
else if (name == "removecart")
{
int amount = 1;
if (Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift))
{
amount = 10;
}
FreightCartWindow.SetCartAssignment(this.CurrentStation, this.CurrentStation.AssignedCarts - amount < 0 ? 0 : this.CurrentStation.AssignedCarts - amount);
this.manager.UpdateLabel("stationcarts" + this.StationDisplay.ToString(), "Carts: " + this.CurrentStation.AvailableCarts.ToString() + " / " + this.CurrentStation.AssignedCarts.ToString(), this.CurrentStation.AvailableCarts > this.CurrentStation.AssignedCarts ? Color.green : this.CurrentStation.AvailableCarts == this.CurrentStation.AssignedCarts ? Color.white : Color.red);
return(true);
}
else if (name == "ordername")
{
this.OrderByName = true;
this.manager.RedrawWindow();
}
else if (name == "ordercount")
{
this.OrderByName = false;
this.manager.RedrawWindow();
}
else if (name == "togglelayout")
{
this.CompactLayout = !this.CompactLayout;
this.manager.RedrawWindow();
}
return(false);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="samplingRate"></param>
/// <param name="featureCount"></param>
/// <param name="frameDuration"></param>
/// <param name="hopDuration"></param>
/// <param name="filterbankSize"></param>
/// <param name="lowFreq"></param>
/// <param name="highFreq"></param>
/// <param name="fftSize"></param>
/// <param name="filterbank"></param>
/// <param name="lifterSize"></param>
/// <param name="preEmphasis"></param>
/// <param name="includeEnergy"></param>
/// <param name="dctType">"1", "1N", "2", "2N", "3", "3N", "4", "4N"</param>
/// <param name="nonLinearity"></param>
/// <param name="spectrumType"></param>
/// <param name="window"></param>
/// <param name="logFloor"></param>
public MfccExtractor(int samplingRate,
int featureCount,
double frameDuration = 0.0256 /*sec*/,
double hopDuration = 0.010 /*sec*/,
int filterbankSize = 24,
double lowFreq = 0,
double highFreq = 0,
int fftSize = 0,
float[][] filterbank = null,
int lifterSize = 0,
double preEmphasis = 0,
bool includeEnergy = false,
string dctType = "2N",
NonLinearityType nonLinearity = NonLinearityType.Log10,
SpectrumType spectrumType = SpectrumType.Power,
WindowTypes window = WindowTypes.Hamming,
float logFloor = float.Epsilon)
: base(samplingRate, frameDuration, hopDuration, preEmphasis)
{
FeatureCount = featureCount;
_lowFreq = lowFreq;
_highFreq = highFreq;
if (filterbank == null)
{
_blockSize = fftSize > FrameSize ? fftSize : MathUtils.NextPowerOfTwo(FrameSize);
var melBands = FilterBanks.MelBands(filterbankSize, _blockSize, SamplingRate, _lowFreq, _highFreq);
FilterBank = FilterBanks.Triangular(_blockSize, SamplingRate, melBands, mapper: Scale.HerzToMel); // HTK/Kaldi-style
}
else
{
FilterBank = filterbank;
filterbankSize = filterbank.Length;
_blockSize = 2 * (filterbank[0].Length - 1);
Guard.AgainstExceedance(FrameSize, _blockSize, "frame size", "FFT size");
}
_fft = new RealFft(_blockSize);
_window = window;
_windowSamples = Window.OfType(_window, FrameSize);
_lifterSize = lifterSize;
_lifterCoeffs = _lifterSize > 0 ? Window.Liftering(FeatureCount, _lifterSize) : null;
_includeEnergy = includeEnergy;
// setup DCT: ============================================================================
_dctType = dctType;
switch (dctType[0])
{
case '1':
_dct = new Dct1(filterbankSize);
break;
case '2':
_dct = new Dct2(filterbankSize);
break;
case '3':
_dct = new Dct3(filterbankSize);
break;
case '4':
_dct = new Dct4(filterbankSize);
break;
default:
throw new ArgumentException("Only DCT-1, 2, 3 and 4 are supported!");
}
if (dctType.Length > 1 && char.ToUpper(dctType[1]) == 'N')
{
_applyDct = mfccs => _dct.DirectNorm(_melSpectrum, mfccs);
}
else
{
_applyDct = mfccs => _dct.Direct(_melSpectrum, mfccs);
}
// setup spectrum post-processing: =======================================================
_logFloor = logFloor;
_nonLinearityType = nonLinearity;
switch (nonLinearity)
{
case NonLinearityType.Log10:
_postProcessSpectrum = () => FilterBanks.ApplyAndLog10(FilterBank, _spectrum, _melSpectrum, _logFloor);
break;
case NonLinearityType.LogE:
_postProcessSpectrum = () => FilterBanks.ApplyAndLog(FilterBank, _spectrum, _melSpectrum, _logFloor);
break;
case NonLinearityType.ToDecibel:
_postProcessSpectrum = () => FilterBanks.ApplyAndToDecibel(FilterBank, _spectrum, _melSpectrum, _logFloor);
break;
case NonLinearityType.CubicRoot:
_postProcessSpectrum = () => FilterBanks.ApplyAndPow(FilterBank, _spectrum, _melSpectrum, 0.33);
break;
default:
_postProcessSpectrum = () => FilterBanks.Apply(FilterBank, _spectrum, _melSpectrum);
break;
}
_spectrumType = spectrumType;
switch (_spectrumType)
{
case SpectrumType.Magnitude:
_getSpectrum = block => _fft.MagnitudeSpectrum(block, _spectrum, false);
break;
case SpectrumType.Power:
_getSpectrum = block => _fft.PowerSpectrum(block, _spectrum, false);
break;
case SpectrumType.MagnitudeNormalized:
_getSpectrum = block => _fft.MagnitudeSpectrum(block, _spectrum, true);
break;
case SpectrumType.PowerNormalized:
_getSpectrum = block => _fft.PowerSpectrum(block, _spectrum, true);
break;
}
// reserve memory for reusable blocks
_spectrum = new float[_blockSize / 2 + 1];
_melSpectrum = new float[filterbankSize];
}
/// <summary>
/// Main constructor
/// </summary>
/// <param name="samplingRate"></param>
/// <param name="featureCount"></param>
/// <param name="frameDuration">Length of analysis window (in seconds)</param>
/// <param name="hopDuration">Length of overlap (in seconds)</param>
/// <param name="power"></param>
/// <param name="lowFreq"></param>
/// <param name="highFreq"></param>
/// <param name="filterbankSize"></param>
/// <param name="filterbank"></param>
/// <param name="fftSize">Size of FFT (in samples)</param>
/// <param name="preEmphasis"></param>
/// <param name="window"></param>
public SpnccExtractor(int samplingRate,
int featureCount,
double frameDuration = 0.0256 /*sec*/,
double hopDuration = 0.010 /*sec*/,
int power = 15,
double lowFreq = 100,
double highFreq = 6800,
int filterbankSize = 40,
float[][] filterbank = null,
int fftSize = 0,
double preEmphasis = 0.0,
WindowTypes window = WindowTypes.Hamming)
: base(samplingRate, frameDuration, hopDuration)
{
FeatureCount = featureCount;
_power = power;
if (filterbank == null)
{
_fftSize = fftSize > FrameSize ? fftSize : MathUtils.NextPowerOfTwo(FrameSize);
_filterbankSize = filterbankSize;
_lowFreq = lowFreq;
_highFreq = highFreq;
FilterBank = FilterBanks.Erb(_filterbankSize, _fftSize, samplingRate, _lowFreq, _highFreq);
// use power spectrum:
foreach (var filter in FilterBank)
{
for (var j = 0; j < filter.Length; j++)
{
var ps = filter[j] * filter[j];
filter[j] = ps;
}
}
}
else
{
FilterBank = filterbank;
_filterbankSize = filterbank.Length;
_fftSize = 2 * (filterbank[0].Length - 1);
}
_fft = new Fft(_fftSize);
_dct = new Dct2(_filterbankSize, FeatureCount);
_preEmphasis = (float)preEmphasis;
_window = window;
if (_window != WindowTypes.Rectangular)
{
_windowSamples = Window.OfType(_window, FrameSize);
}
_block = new float[_fftSize];
_spectrum = new float[_fftSize / 2 + 1];
_filteredSpectrum = new float[_filterbankSize];
_zeroblock = new float[_fftSize];
}
public Window(int id, int parent, Rect newSize, WindowTypes type = WindowTypes.Text, NodeType nodeType = NodeType.Default)
{
ID = id; Parent = parent; Size = newSize; Text = ""; Type = type; NodeType = nodeType; Trigger = false; TriggerText = "";
}
/// <summary>
///
/// </summary>
/// <param name="signal"></param>
/// <param name="window"></param>
public static void ApplyWindow(this DiscreteSignal signal, WindowTypes window, params object[] parameters)
{
var windowSamples = Window.OfType(window, signal.Length, parameters);
signal.Samples.ApplyWindow(windowSamples);
}
/// <summary>
///
/// </summary>
/// <param name="samples"></param>
/// <param name="window"></param>
public static void ApplyWindow(this double[] samples, WindowTypes window, params object[] parameters)
{
var windowSamples = Window.OfType(window, samples.Length, parameters).ToDoubles();
samples.ApplyWindow(windowSamples);
}
/// Windowタイプ別にScreen座標系での領域を返す
public static ScreenRect GetWindowScreenRect(WindowTypes windowType, UIntPtr window)
{
var screenRect = Utilities.GetWindowRect(windowType, window);
var screenPoint =
Utilities.ClientToScreen(windowType, window, screenRect.X, screenRect.Y);
return new ScreenRect(screenPoint.X, screenPoint.Y,
screenRect.Width, screenRect.Height);
}
//===================================================================
// WindowType/Window別の機能
//===================================================================
/// WindowのClient座標系での領域を返す
/// @warning windowType == Desktop時のみ、左上端がマイナス座標になる可能性がある
/// @param windowType Windowタイプ
/// @param window Windowハンドル
/// @return WindowのClient座標系での領域(Desktopのみ左上端が(0,0)とは限らない)
public static ClientRect GetWindowRect(WindowTypes windowType, UIntPtr window)
{
switch (windowType) {
case WindowTypes.Normal: {
Debug.Assert(Common.Utilities.IsWindowValid(window),
"Invalid Window", "GetWindowRect");
User32.RECT windowRect;
User32.GetClientRect(window, out windowRect);
return new ClientRect(0, 0, windowRect.Right, windowRect.Bottom);
}
case WindowTypes.DXGI: {
return new ClientRect(0, 0,
User32.GetSystemMetrics(User32.SM_CXVIRTUALSCREEN),
User32.GetSystemMetrics(User32.SM_CYVIRTUALSCREEN));
}
case WindowTypes.Desktop: {
return new ClientRect(
User32.GetSystemMetrics(User32.SM_XVIRTUALSCREEN),
User32.GetSystemMetrics(User32.SM_YVIRTUALSCREEN),
User32.GetSystemMetrics(User32.SM_CXVIRTUALSCREEN),
User32.GetSystemMetrics(User32.SM_CYVIRTUALSCREEN));
}
default: Debug.Fail("switch"); throw new System.ArgumentException();
}
}
/// Client座標系の座標をWindowタイプ別にScreen座標系に変換する
public static ScreenPoint ClientToScreen(WindowTypes windowType, UIntPtr window, int clientX, int clientY)
{
switch (windowType) {
case WindowTypes.Normal: {
Debug.Assert(Common.Utilities.IsWindowValid(window),
"Invalid Window", "ClientToScreen");
User32.POINT windowPoint = new User32.POINT { X = clientX, Y = clientY };
User32.ClientToScreen(window, ref windowPoint);
return new ScreenPoint(windowPoint.X, windowPoint.Y);
}
case WindowTypes.DXGI: {
// VirtualScreen座標なので補正を戻す
return new ScreenPoint(clientX + User32.GetSystemMetrics(User32.SM_XVIRTUALSCREEN),
clientY + User32.GetSystemMetrics(User32.SM_YVIRTUALSCREEN));
}
case WindowTypes.Desktop: {
// Screen座標系なのでそのまま返す
return new ScreenPoint(clientX, clientY);
}
default: Debug.Fail("switch"); throw new System.ArgumentException();
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="samplingRate"></param>
/// <param name="featureCount"></param>
/// <param name="filterbank"></param>
/// <param name="frameDuration"></param>
/// <param name="hopDuration"></param>
/// <param name="preEmphasis"></param>
/// <param name="nonLinearity"></param>
/// <param name="spectrumType"></param>
/// <param name="window"></param>
/// <param name="logFloor"></param>
public FilterbankExtractor(int samplingRate,
int featureCount,
float[][] filterbank,
double frameDuration = 0.0256 /*sec*/,
double hopDuration = 0.010 /*sec*/,
double preEmphasis = 0,
NonLinearityType nonLinearity = NonLinearityType.None,
SpectrumType spectrumType = SpectrumType.Power,
WindowTypes window = WindowTypes.Hamming,
float logFloor = float.Epsilon)
: base(samplingRate, frameDuration, hopDuration, preEmphasis)
{
FeatureCount = featureCount;
FilterBank = filterbank;
_blockSize = 2 * (filterbank[0].Length - 1);
Guard.AgainstExceedance(FrameSize, _blockSize, "frame size", "FFT size");
_fft = new RealFft(_blockSize);
_window = window;
_windowSamples = Window.OfType(_window, FrameSize);
// setup spectrum post-processing: =======================================================
_logFloor = logFloor;
_nonLinearityType = nonLinearity;
switch (nonLinearity)
{
case NonLinearityType.Log10:
_postProcessSpectrum = () => FilterBanks.ApplyAndLog10(FilterBank, _spectrum, _bandSpectrum, _logFloor);
break;
case NonLinearityType.LogE:
_postProcessSpectrum = () => FilterBanks.ApplyAndLog(FilterBank, _spectrum, _bandSpectrum, _logFloor);
break;
case NonLinearityType.ToDecibel:
_postProcessSpectrum = () => FilterBanks.ApplyAndToDecibel(FilterBank, _spectrum, _bandSpectrum, _logFloor);
break;
case NonLinearityType.CubicRoot:
_postProcessSpectrum = () => FilterBanks.ApplyAndPow(FilterBank, _spectrum, _bandSpectrum, 0.33);
break;
default:
_postProcessSpectrum = () => FilterBanks.Apply(FilterBank, _spectrum, _bandSpectrum);
break;
}
_spectrumType = spectrumType;
switch (_spectrumType)
{
case SpectrumType.Magnitude:
_getSpectrum = block => _fft.MagnitudeSpectrum(block, _spectrum, false);
break;
case SpectrumType.Power:
_getSpectrum = block => _fft.PowerSpectrum(block, _spectrum, false);
break;
case SpectrumType.MagnitudeNormalized:
_getSpectrum = block => _fft.MagnitudeSpectrum(block, _spectrum, true);
break;
case SpectrumType.PowerNormalized:
_getSpectrum = block => _fft.PowerSpectrum(block, _spectrum, true);
break;
}
// reserve memory for reusable blocks
_spectrum = new float[_blockSize / 2 + 1];
_bandSpectrum = new float[filterbank.Length];
}
/// <summary>
/// FIR filter design using window method
/// </summary>
/// <param name="order">Filter order</param>
/// <param name="frequencyResponse">Complex frequency response</param>
/// <param name="window">Window</param>
/// <returns>FIR filter kernel</returns>
public static FirFilter Fir(int order, ComplexDiscreteSignal frequencyResponse, WindowTypes window = WindowTypes.Blackman)
{
return(Fir(order, frequencyResponse.Real, frequencyResponse.Imag, window));
}
public void Init(Point position, Size size, WindowTypes windowType)
{
IntPtr hInstance = processHandle.DangerousGetHandle();
string szAppName = "ImGuiWindow~" + this.GetHashCode();
this.wndclass.style = 0x0002 /*CS_HREDRAW*/ | 0x0001 /*CS_VREDRAW*/ | 0x0020 /*CS_OWNDC*/;
this.wndclass.lpfnWndProc = WindowProc;
this.wndclass.cbClsExtra = 0;
this.wndclass.cbWndExtra = 0;
this.wndclass.hInstance = hInstance;
this.wndclass.hIcon = LoadIcon(IntPtr.Zero, new IntPtr(32512 /*IDI_APPLICATION*/));
this.wndclass.hCursor = LoadCursor(IntPtr.Zero, 32512 /*IDC_ARROW*/);
this.wndclass.hbrBackground = IntPtr.Zero;// GetStockObject(0);
this.wndclass.lpszMenuName = null;
this.wndclass.lpszClassName = szAppName;
ushort atom = RegisterClass(ref this.wndclass);
if (atom == 0)
{
throw new WindowCreateException(string.Format("RegisterClass error: {0}", Marshal.GetLastWin32Error()));
}
WindowStyles windowStyle;
switch (windowType)
{
case WindowTypes.Regular:
windowStyle = WindowStyles.WS_OVERLAPPEDWINDOW | WindowStyles.WS_VISIBLE;
break;
case WindowTypes.ToolBox:
windowStyle = WindowStyles.WS_DLGFRAME;
break;
case WindowTypes.ToolTip:
windowStyle = WindowStyles.WS_POPUP;
break;
case WindowTypes.Hidden:
windowStyle = 0;
break;
default:
windowStyle = WindowStyles.WS_OVERLAPPEDWINDOW;
break;
}
// rect of the desired client area
RECT rc = new RECT
{
left = (int)position.X,
top = (int)position.Y,
right = (int)(position.X + size.Width),
bottom = (int)(position.Y + size.Height)
};
if (!AdjustWindowRect(ref rc, (uint)windowStyle, false))
{
throw new WindowCreateException(string.Format("AdjustWindowRectEx fails, win32 error: {0}", Marshal.GetLastWin32Error()));
}
//now rc is the rect of the window
IntPtr hwnd = CreateWindowEx(
0 /*0x00000008*//*WS_EX_TOPMOST*/, // window style ex //HACK always on top
new IntPtr(atom), // window class name
"ImGuiWindow~", // window caption
(uint)windowStyle, // window style
rc.left, // initial x position
rc.top, // initial y position
rc.right - rc.left, // initial x size
rc.bottom - rc.top, // initial y size
IntPtr.Zero, // parent window handle
IntPtr.Zero, // window menu handle
hInstance, // program instance handle
IntPtr.Zero); // creation parameters
if (hwnd == IntPtr.Zero)
{
throw new WindowCreateException(string.Format("CreateWindowEx error: {0}", Marshal.GetLastWin32Error()));
}
this.hwnd = hwnd;
}
/// 現在編集中のレイアウト要素のクリッピング領域/Fitオプションを変更する
private void CommonAreaSelect(bool changeWindowType = false,
WindowTypes nextWindowType = WindowTypes.Normal)
{
OnDragHereSetTargetWindow(null, EventArgs.Empty);
if (!App.Profile.Current.IsWindowValid)
{
Debug.WriteLine("Invalid Window", "Area.CommonAreaSelect");
return;
}
//-----------------------------------------------------------------
// ダイアログの準備
//-----------------------------------------------------------------
var dialog = new AreaSelectWindow();
// サイズ
var screenRect = App.Profile.Current.ScreenClippingRectWithFit;
dialog.Left = screenRect.X;
dialog.Top = screenRect.Y;
dialog.Width = screenRect.Width;
dialog.Height = screenRect.Height;
// カラーの変更
Brush border, background;
this.GetWindowTypesBrushes(
App.Profile.Current.WindowType, nextWindowType,
out border, out background);
dialog.WindowBorder.BorderBrush = border;
dialog.WindowGrid.Background = background;
// ダイアログの表示
var result = dialog.ShowDialog();
if (!result.HasValue || !(bool)result)
{
return;
}
// 結果をScreenRectにまとめる
var nextScreenRect = new ScreenRect(
(int)dialog.Left, (int)dialog.Top, (int)dialog.Width, (int)dialog.Height);
// Profile更新
App.Profile.Open();
if (changeWindowType)
{
switch (nextWindowType)
{
case WindowTypes.DXGI: {
App.Profile.Current.SetWindowToDXGI();
break;
}
case WindowTypes.Desktop: {
App.Profile.Current.SetWindowToDesktop();
break;
}
default: Debug.Fail("switch"); throw new System.ArgumentException();
}
}
App.Profile.Current.SetClippingRectByScreenRect(nextScreenRect);
App.Profile.Current.ClearBackupParameters();
App.Profile.Close();
//-----------------------------------------------------------------
// Notify self
this.OnCurrentLayoutElementChanged();
// Notify other controls
if (changeWindowType)
{
Commands.TargetWindowChanged.Execute(null, this);
}
else
{
// TargetWindowの更新は必要ないのでプレビューのみ更新
Commands.CurrentLayoutElementVisualChanged.Execute(null, this);
}
//-----------------------------------------------------------------
}
/// <summary>
/// Gets the time samples for the specified window.
/// </summary>
/// <param name="type">The window type.</param>
/// <param name="length">The length.</param>
/// <returns></returns>
public static IEnumerable <double> GetWindow(WindowTypes type, int length)
{
var hw = GetHalfWindow(type, (length >> 1) + 1).ToReadOnlyList();
return(hw.Reverse().Concat(hw.GetPaddedRange(1, ((length + 1) >> 1) - 1)));
}
/// WindowタイプをNormalに＋Windowハンドルを設定する
/// @param window 設定するWindowハンドル
public void SetWindow(UIntPtr window)
{
this.additionalData.WindowType = WindowTypes.Normal;
this.rawData.Window = window;
var windowCaption = "n/a";
if (Common.Utilities.IsWindowValid(window)) {
StringBuilder className = new StringBuilder(256);
User32.GetClassName(window, className, 256);
windowCaption = className.ToString();
}
this.additionalData.WindowCaption = windowCaption;
}
/// <summary>
/// Initializes a new instance of the <see cref="Window" /> Class. The window will have its maximum at time 0.
/// </summary>
/// <param name="type">The window type.</param>
/// <param name="length">The window length.</param>
/// <param name="samplerate">The window samplerate.</param>
/// <param name="mode">The window mode.</param>
public Window(WindowTypes type, int length, double samplerate, WindowModes mode)
: this(type, GetDefaultStart(mode, length), length, samplerate, mode)
{
}
/// WindowタイプをDXGIにする
public void SetWindowToDXGI()
{
this.additionalData.WindowType = WindowTypes.DXGI;
this.rawData.Window = Utilities.DXGIWindow;
this.additionalData.WindowCaption = "(DXGI)";
}
/// <summary>
/// Gets the positive half of a window function.
/// </summary>
/// <param name="type">The window type.</param>
/// <param name="length">The length of the half window.</param>
/// <returns></returns>
/// <remarks>https://en.wikipedia.org/wiki/Window_function#A_list_of_window_functions</remarks>
public static IEnumerable <double> GetHalfWindow(WindowTypes type, int length)
{
// first value is always 1
yield return(1.0);
switch (type)
{
case WindowTypes.Rectangular:
for (var n = length - 1; n > 0; n--)
{
yield return(1.0);
}
break;
case WindowTypes.Hann:
for (var n = length - 1; n > 0; n--)
{
yield return(0.5 * (1 - Math.Cos(Math.PI * n / length)));
}
break;
case WindowTypes.Hamming:
for (var n = length - 1; n > 0; n--)
{
yield return(0.54 - 0.46 * Math.Cos(Math.PI * n / length));
}
break;
case WindowTypes.Triangular:
for (var n = length - 1; n > 0; n--)
{
yield return(1 - (double)(length - n) / length);
}
break;
case WindowTypes.Welch:
for (var n = length - 1; n > 0; n--)
{
yield return(1 - Math.Pow((double)(length - n) / length, 2));
}
break;
case WindowTypes.Blackman:
for (var n = length - 1; n > 0; n--)
{
yield return(0.42659 - 0.49656 * Math.Cos(Math.PI * n / length) + 0.076849 * Math.Cos(2 * Math.PI * n / length));
}
break;
case WindowTypes.BlackmanHarris:
for (var n = length - 1; n > 0; n--)
{
yield return(0.35875 - 0.48829 * Math.Cos(Math.PI * n / length) + 0.14128 * Math.Cos(2 * Math.PI * n / length) -
0.01168 * Math.Cos(3 * Math.PI * n / length));
}
break;
case WindowTypes.KaiserAlpha2:
{
var denom = Dsp.ModBessel0(Math.PI * 2);
for (var n = length - 1; n > 0; n--)
{
yield return(Dsp.ModBessel0(Math.PI * 2 * Math.Sqrt(1 - Math.Pow((double)n / length - 1, 2))) / denom);
}
}
break;
case WindowTypes.KaiserAlpha3:
{
var denom = Dsp.ModBessel0(Math.PI * 3);
for (var n = length - 1; n > 0; n--)
{
yield return(Dsp.ModBessel0(Math.PI * 3 * Math.Sqrt(1 - Math.Pow((double)n / length - 1, 2))) / denom);
}
}
break;
}
}
/// 現在編集中のレイアウト要素のクリッピング領域/Fitオプションを変更する
private void CommonAreaSelect(bool changeWindowType = false,
WindowTypes nextWindowType = WindowTypes.Normal)
{
if (!App.Profile.Current.IsWindowValid) {
Debug.WriteLine("Invalid Window", "Area.CommonAreaSelect");
return;
}
//-----------------------------------------------------------------
// ダイアログの準備
//-----------------------------------------------------------------
var dialog = new AreaSelectWindow();
// サイズ
var screenRect = App.Profile.Current.ScreenClippingRectWithFit;
dialog.Left = screenRect.X;
dialog.Top = screenRect.Y;
dialog.Width = screenRect.Width;
dialog.Height = screenRect.Height;
// カラーの変更
Brush border, background;
this.GetWindowTypesBrushes(
App.Profile.Current.WindowType, nextWindowType,
out border, out background);
dialog.WindowBorder.BorderBrush = border;
dialog.WindowGrid.Background = background;
// ダイアログの表示
var result = dialog.ShowDialog();
if (!result.HasValue || !(bool)result) return;
// 結果をScreenRectにまとめる
var nextScreenRect = new ScreenRect(
(int)dialog.Left, (int)dialog.Top, (int)dialog.Width, (int)dialog.Height);
// Profile更新
App.Profile.Open();
if (changeWindowType) {
switch (nextWindowType) {
case WindowTypes.DXGI: {
App.Profile.Current.SetWindowToDXGI();
break;
}
case WindowTypes.Desktop: {
App.Profile.Current.SetWindowToDesktop();
break;
}
default: Debug.Fail("switch"); throw new System.ArgumentException();
}
}
App.Profile.Current.SetClippingRectByScreenRect(nextScreenRect);
App.Profile.Current.ClearBackupParameters();
App.Profile.Close();
//-----------------------------------------------------------------
// Notify self
this.OnCurrentLayoutElementChanged();
// Notify other controls
if (changeWindowType) {
Commands.TargetWindowChanged.Execute(null, this);
} else {
// TargetWindowの更新は必要ないのでプレビューのみ更新
Commands.CurrentLayoutElementVisualChanged.Execute(null, this);
}
//-----------------------------------------------------------------
}
internal Form(Point position, Size size, WindowTypes type)
: this(position, size, "ImGui Form", type)
{
}
/// <summary>
/// Opens a window.
/// </summary>
/// <param name="window">The type of window to open.</param>
public static void OpenWindow(WindowTypes window)
{
OnWindowOpen?.Invoke(Properties.windows[(int)window]);
}
internal Form(Rect rect, string title, WindowTypes type)
: this(rect.TopLeft, rect.Size, title, type)
{
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="samplingRate"></param>
/// <param name="featureList"></param>
/// <param name="frameDuration"></param>
/// <param name="hopDuration"></param>
/// <param name="fftSize"></param>
/// <param name="frequencyBands"></param>
/// <param name="parameters"></param>
public Mpeg7SpectralFeaturesExtractor(int samplingRate,
string featureList,
double frameDuration = 0.0256 /*sec*/,
double hopDuration = 0.010 /*sec*/,
int fftSize = 0,
Tuple <double, double, double>[] frequencyBands = null,
WindowTypes window = WindowTypes.Hamming,
IReadOnlyDictionary <string, object> parameters = null)
: base(samplingRate, frameDuration, hopDuration)
{
if (featureList == "all" || featureList == "full")
{
featureList = FeatureSet;
}
var features = featureList.Split(',', '+', '-', ';', ':')
.Select(f => f.Trim().ToLower());
_extractors = features.Select <string, Func <float[], float[], float> >(feature =>
{
switch (feature)
{
case "sc":
case "centroid":
return(Spectral.Centroid);
case "ss":
case "spread":
return(Spectral.Spread);
case "sfm":
case "flatness":
if (parameters?.ContainsKey("minLevel") ?? false)
{
var minLevel = (float)parameters["minLevel"];
return((spectrum, freqs) => Spectral.Flatness(spectrum, minLevel));
}
else
{
return((spectrum, freqs) => Spectral.Flatness(spectrum));
}
case "sn":
case "noiseness":
if (parameters?.ContainsKey("noiseFrequency") ?? false)
{
var noiseFrequency = (float)parameters["noiseFrequency"];
return((spectrum, freqs) => Spectral.Noiseness(spectrum, freqs, noiseFrequency));
}
else
{
return((spectrum, freqs) => Spectral.Noiseness(spectrum, freqs));
}
case "rolloff":
if (parameters?.ContainsKey("rolloffPercent") ?? false)
{
var rolloffPercent = (float)parameters["rolloffPercent"];
return((spectrum, freqs) => Spectral.Rolloff(spectrum, freqs, rolloffPercent));
}
else
{
return((spectrum, freqs) => Spectral.Rolloff(spectrum, freqs));
}
case "crest":
return((spectrum, freqs) => Spectral.Crest(spectrum));
case "entropy":
case "ent":
return((spectrum, freqs) => Spectral.Entropy(spectrum));
case "sd":
case "decrease":
return((spectrum, freqs) => Spectral.Decrease(spectrum));
case "loud":
case "loudness":
return((spectrum, freqs) => Perceptual.Loudness(spectrum));
case "sharp":
case "sharpness":
return((spectrum, freqs) => Perceptual.Sharpness(spectrum));
default:
return((spectrum, freqs) => 0);
}
}).ToList();
FeatureDescriptions = features.ToList();
_fftSize = fftSize > FrameSize ? fftSize : MathUtils.NextPowerOfTwo(FrameSize);
_fft = new Fft(_fftSize);
_window = window;
if (_window != WindowTypes.Rectangular)
{
_windowSamples = Window.OfType(_window, FrameSize);
}
_frequencyBands = frequencyBands ?? FilterBanks.OctaveBands(6, _fftSize, samplingRate);
_filterbank = FilterBanks.Rectangular(_fftSize, samplingRate, _frequencyBands);
var cfs = _frequencyBands.Select(b => b.Item2).ToList();
// insert zero frequency so that it'll be ignored during calculations
// just like in case of FFT spectrum (0th DC component)
cfs.Insert(0, 0);
_frequencies = cfs.ToFloats();
_parameters = parameters;
// reserve memory for reusable blocks
_spectrum = new float[_fftSize / 2 + 1]; // buffer for magnitude spectrum
_mappedSpectrum = new float[_filterbank.Length + 1]; // buffer for total energies in bands
_block = new float[_fftSize]; // buffer for currently processed block
_zeroblock = new float[_fftSize]; // just a buffer of zeros for quick memset
}
private void windowsComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
_windowType = (WindowTypes)windowsComboBox.SelectedIndex;
windowPlot.Line = Window.OfType(_windowType, 256);
}
/// <summary>
/// FIR filter design using window method
/// </summary>
/// <param name="order">Filter order</param>
/// <param name="magnitudeResponse">Magnitude response</param>
/// <param name="phaseResponse">Phase response</param>
/// <param name="window">Window</param>
/// <returns>FIR filter kernel</returns>
public static FirFilter Fir(int order, double[] magnitudeResponse, double[] phaseResponse = null, WindowTypes window = WindowTypes.Blackman)
{
if (order % 2 == 0)
{
throw new ArgumentException("The order of a filter must be an odd number!");
}
var fftSize = MathUtils.NextPowerOfTwo(magnitudeResponse.Length);
var real = phaseResponse == null?
magnitudeResponse.PadZeros(fftSize) :
magnitudeResponse.Zip(phaseResponse, (m, p) => m * Math.Cos(p)).ToArray();
var imag = phaseResponse == null ?
new double[fftSize] :
magnitudeResponse.Zip(phaseResponse, (m, p) => m * Math.Sin(p)).ToArray();
var fft = new Fft64(fftSize);
fft.Inverse(real, imag);
var kernel = new double[order];
var compensation = 2.0 / fftSize;
var middle = order / 2;
for (var i = 0; i <= middle; i++)
{
kernel[i] = real[middle - i] * compensation;
kernel[i + middle] = real[i] * compensation;
}
kernel.ApplyWindow(window);
return(new FirFilter(kernel));
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="samplingRate"></param>
/// <param name="featureCount"></param>
/// <param name="frameDuration"></param>
/// <param name="hopDuration"></param>
/// <param name="lpcOrder"></param>
/// <param name="rasta"></param>
/// <param name="filterbankSize"></param>
/// <param name="lowFreq"></param>
/// <param name="highFreq"></param>
/// <param name="fftSize"></param>
/// <param name="lifterSize"></param>
/// <param name="preEmphasis"></param>
/// <param name="window"></param>
/// <param name="filterbank"></param>
/// <param name="centerFrequencies"></param>
public PlpExtractor(int samplingRate,
int featureCount,
double frameDuration = 0.0256 /*sec*/,
double hopDuration = 0.010 /*sec*/,
int lpcOrder = 0, // will be autocalculated as featureCount - 1
double rasta = 0,
int filterbankSize = 24,
double lowFreq = 0,
double highFreq = 0,
int fftSize = 0,
int lifterSize = 0,
double preEmphasis = 0,
WindowTypes window = WindowTypes.Hamming,
float[][] filterbank = null,
double[] centerFrequencies = null)
: base(samplingRate, frameDuration, hopDuration, preEmphasis)
{
FeatureCount = featureCount;
// ================================ Prepare filter bank and center frequencies: ===========================================
_lowFreq = lowFreq;
_highFreq = highFreq;
if (filterbank == null)
{
_blockSize = fftSize > FrameSize ? fftSize : MathUtils.NextPowerOfTwo(FrameSize);
var barkBands = FilterBanks.BarkBandsSlaney(filterbankSize, _blockSize, samplingRate, _lowFreq, _highFreq);
FilterBank = FilterBanks.BarkBankSlaney(filterbankSize, _blockSize, samplingRate, _lowFreq, _highFreq);
_centerFrequencies = barkBands.Select(b => b.Item2).ToArray();
}
else
{
FilterBank = filterbank;
filterbankSize = filterbank.Length;
_blockSize = 2 * (filterbank[0].Length - 1);
Guard.AgainstExceedance(FrameSize, _blockSize, "frame size", "FFT size");
if (centerFrequencies != null)
{
_centerFrequencies = centerFrequencies;
}
else
{
var herzResolution = (double)samplingRate / _blockSize;
// try to determine center frequencies automatically from filterbank weights:
_centerFrequencies = new double[filterbankSize];
for (var i = 0; i < filterbank.Length; i++)
{
var minPos = 0;
var maxPos = _blockSize / 2;
for (var j = 0; j < filterbank[i].Length; j++)
{
if (filterbank[i][j] > 0)
{
minPos = j;
break;
}
}
for (var j = minPos; j < filterbank[i].Length; j++)
{
if (filterbank[i][j] == 0)
{
maxPos = j;
break;
}
}
_centerFrequencies[i] = herzResolution * (maxPos + minPos) / 2;
}
}
}
// ==================================== Compute equal loudness curve: =========================================
_equalLoudnessCurve = new double[filterbankSize];
for (var i = 0; i < _centerFrequencies.Length; i++)
{
var level2 = _centerFrequencies[i] * _centerFrequencies[i];
_equalLoudnessCurve[i] = Math.Pow(level2 / (level2 + 1.6e5), 2) * ((level2 + 1.44e6) / (level2 + 9.61e6));
}
// ============================== Prepare RASTA filters (if necessary): =======================================
_rasta = rasta;
if (rasta > 0)
{
_rastaFilters = Enumerable.Range(0, filterbankSize)
.Select(f => new RastaFilter(rasta))
.ToArray();
}
// ============== Precompute IDFT table for obtaining autocorrelation coeffs from power spectrum: =============
_lpcOrder = lpcOrder > 0 ? lpcOrder : FeatureCount - 1;
_idftTable = new float[_lpcOrder + 1][];
var bandCount = filterbankSize + 2; // +2 duplicated edges
var freq = Math.PI / (bandCount - 1);
for (var i = 0; i < _idftTable.Length; i++)
{
_idftTable[i] = new float[bandCount];
_idftTable[i][0] = 1.0f;
for (var j = 1; j < bandCount - 1; j++)
{
_idftTable[i][j] = 2 * (float)Math.Cos(freq * i * j);
}
_idftTable[i][bandCount - 1] = (float)Math.Cos(freq * i * (bandCount - 1));
}
_lpc = new float[_lpcOrder + 1];
_cc = new float[bandCount];
// =================================== Prepare everything else: ==============================
_fft = new RealFft(_blockSize);
_window = window;
_windowSamples = Window.OfType(_window, FrameSize);
_lifterSize = lifterSize;
_lifterCoeffs = _lifterSize > 0 ? Window.Liftering(FeatureCount, _lifterSize) : null;
_spectrum = new float[_blockSize / 2 + 1];
_bandSpectrum = new float[filterbankSize];
}
