anonymous_namespace{SpectrogramSettings.cpp} Namespace Reference

Enumerations
enum	{ WINDOW , TWINDOW , DWINDOW }

Functions
void	RecreateWindow (Floats &window, int which, size_t fftLen, size_t padding, int windowType, size_t windowSize, double &scale)

Variables
IntSetting	SpectrumAlgorithm
IntSetting	SpectrumScale
IntSetting	SpectrumWindowFunction
BoolSetting	SpectrumEnableSelection
IntSetting	SpectrumFFTSize
IntSetting	SpectrumFrequencyGain
IntSetting	SpectrumGain
BoolSetting	SpectrumGrayscale
IntSetting	SpectrumMinFreq
IntSetting	SpectrumRange
IntSetting	SpectrumZeroPaddingFactor

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
WINDOW
TWINDOW
DWINDOW

Definition at line 537 of file SpectrogramSettings.cpp.

{ WINDOW, TWINDOW, DWINDOW };

Function Documentation

RecreateWindow()

void anonymous_namespace{SpectrogramSettings.cpp}::RecreateWindow	(	Floats &	window,
		int	which,
		size_t	fftLen,
		size_t	padding,
		int	windowType,
		size_t	windowSize,
		double &	scale
	)

Definition at line 538 of file SpectrogramSettings.cpp.

   {
      // Create the requested window function
      window = Floats{ fftLen };
      size_t ii;
 
      const bool extra = padding > 0;
      wxASSERT(windowSize % 2 == 0);
      if (extra)
         // For windows that do not go to 0 at the edges, this improves symmetry
         ++windowSize;
      const size_t endOfWindow = padding + windowSize;
      // Left and right padding
      for (ii = 0; ii < padding; ++ii) {
         window[ii] = 0.0;
         window[fftLen - ii - 1] = 0.0;
      }
      // Default rectangular window in the middle
      for (; ii < endOfWindow; ++ii)
         window[ii] = 1.0;
      // Overwrite middle as needed
      switch (which) {
      case WINDOW:
         NewWindowFunc(windowType, windowSize, extra, window.get() + padding);
         break;
      case TWINDOW:
         NewWindowFunc(windowType, windowSize, extra, window.get() + padding);
         {
            for (int jj = padding, multiplier = -(int)windowSize / 2; jj < (int)endOfWindow; ++jj, ++multiplier)
               window[jj] *= multiplier;
         }
         break;
      case DWINDOW:
         DerivativeOfWindowFunc(windowType, windowSize, extra, window.get() + padding);
         break;
      default:
         wxASSERT(false);
      }
      // Scale the window function to give 0dB spectrum for 0dB sine tone
      if (which == WINDOW) {
         scale = 0.0;
         for (ii = padding; ii < endOfWindow; ++ii)
            scale += window[ii];
         if (scale > 0)
            scale = 2.0 / scale;
      }
      for (ii = padding; ii < endOfWindow; ++ii)
         window[ii] *= scale;
   }

References DerivativeOfWindowFunc(), DWINDOW, NewWindowFunc(), TWINDOW, WINDOW, SpectrogramSettings::window, SpectrogramSettings::windowSize, and SpectrogramSettings::windowType.

Referenced by SpectrogramSettings::CacheWindows().

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Variable Documentation

SpectrumAlgorithm

IntSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumAlgorithm

Initial value:

{
   L"/Spectrum/Algorithm", 0 }

Definition at line 39 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::LoadPrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().

SpectrumEnableSelection

BoolSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumEnableSelection

Initial value:

{
   L"/Spectrum/EnableSpectralSelection", true }

Definition at line 46 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::Globals::LoadPrefs(), SpectrogramSettings::LoadPrefs(), SpectrogramSettings::Globals::SavePrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().

SpectrumFFTSize

IntSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumFFTSize

Initial value:

{
   L"/Spectrum/FFTSize", 2048 }

Definition at line 48 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::LoadPrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().

SpectrumFrequencyGain

IntSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumFrequencyGain

Initial value:

{
   L"/Spectrum/FrequencyGain", 0 }

Definition at line 50 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::LoadPrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().

SpectrumGain

IntSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumGain

Initial value:

{
   L"/Spectrum/Gain", 20 }

Definition at line 52 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::LoadPrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().

SpectrumGrayscale

BoolSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumGrayscale

Initial value:

{
   L"/Spectrum/Grayscale", false }

Definition at line 54 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::ColorSchemeEnumSetting::Migrate().

SpectrumMinFreq

IntSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumMinFreq

Initial value:

{
   L"/Spectrum/MinFreq", 0 }

Definition at line 56 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::LoadPrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().

SpectrumRange

IntSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumRange

Initial value:

{
   L"/Spectrum/Range", 80 }

Definition at line 58 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::LoadPrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().

SpectrumScale

IntSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumScale

Initial value:

{
   L"/Spectrum/ScaleType", 2 }

Definition at line 41 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::LoadPrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().

SpectrumWindowFunction

IntSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumWindowFunction

Initial value:

{
   L"/Spectrum/WindowType", eWinFuncHann }

Definition at line 43 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::LoadPrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().

SpectrumZeroPaddingFactor

IntSetting anonymous_namespace{SpectrogramSettings.cpp}::SpectrumZeroPaddingFactor

Initial value:

{
   L"/Spectrum/ZeroPaddingFactor", 2 }

Definition at line 60 of file SpectrogramSettings.cpp.

Referenced by SpectrogramSettings::LoadPrefs(), SpectrogramSettings::SavePrefs(), and SpectrogramSettings::UpdatePrefs().