SpectrogramSettings.h

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/**********************************************************************
 
Audacity: A Digital Audio Editor
 
SpectrogramSettings.h
 
Paul Licameli
 
**********************************************************************/
 
#ifndef __AUDACITY_SPECTROGRAM_SETTINGS__
#define __AUDACITY_SPECTROGRAM_SETTINGS__
 
#include "Prefs.h"
#include "SampleFormat.h"
#include "RealFFTf.h"
 
#undef SPECTRAL_SELECTION_GLOBAL_SWITCH
 
class EnumValueSymbols;
struct FFTParam;
class NumberScale;
class SpectrumPrefs;
class wxArrayStringEx;
 
class AUDACITY_DLL_API SpectrogramSettings : public PrefsListener
{
   friend class SpectrumPrefs;
public:
 
   // Singleton for settings that are not per-track
   class AUDACITY_DLL_API Globals
   {
   public:
      static Globals &Get();
      void SavePrefs();
 
#ifdef SPECTRAL_SELECTION_GLOBAL_SWITCH
      bool spectralSelection;
#endif
 
   private:
      Globals();
      void LoadPrefs();
   };
 
   enum {
      LogMinWindowSize = 3,
      LogMaxWindowSize = 15,
 
      NumWindowSizes = LogMaxWindowSize - LogMinWindowSize + 1,
   };
 
   // Do not assume that this enumeration will remain the
   // same as NumberScaleType in future.  That enum may become
   // more general purpose.
   typedef int ScaleType;
   enum ScaleTypeValues : int {
      stLinear,
      stLogarithmic,
      stMel,
      stBark,
      stErb,
      stPeriod,
 
      stNumScaleTypes,
   };
 
   static const EnumValueSymbols &GetScaleNames();
   static const EnumValueSymbols &GetColorSchemeNames();
   static const TranslatableStrings &GetAlgorithmNames();
 
   static SpectrogramSettings &defaults();
   SpectrogramSettings();
   SpectrogramSettings(const SpectrogramSettings &other);
   SpectrogramSettings& operator= (const SpectrogramSettings &other);
   ~SpectrogramSettings();
 
   bool IsDefault() const
   {
      return this == &defaults();
   }
 
   bool Validate(bool quiet);
   void LoadPrefs();
   void SavePrefs();
 
   void UpdatePrefs() override;
 
   void InvalidateCaches();
   void DestroyWindows();
   void CacheWindows() const;
   void ConvertToEnumeratedWindowSizes();
   void ConvertToActualWindowSizes();
 
   // Need to be told what the bin unit is, as this structure does not know
   // the rate
   float findBin( float frequency, float binUnit ) const;
 
   // If "bins" is false, units are Hz
   NumberScale GetScale( float minFreq, float maxFreq ) const;
 
   int minFreq;
   int maxFreq;
 
   bool SpectralSelectionEnabled() const;
 
public:
   int range;
   int gain;
   int frequencyGain;
 
   int windowType;
 
private:
   int windowSize;
public:
   size_t WindowSize() const { return windowSize; }
 
#ifdef EXPERIMENTAL_ZERO_PADDED_SPECTROGRAMS
private:
   int zeroPaddingFactor;
public:
   size_t ZeroPaddingFactor() const {
      return algorithm == algPitchEAC ? 1 : zeroPaddingFactor;
   }
#endif
 
   size_t GetFFTLength() const; // window size (times zero padding, if STFT)
   size_t NBins() const;
 
   enum ColorScheme : int {
      // Keep in correspondence with AColor::colorSchemes, AColor::gradient_pre
      csColorNew = 0,
      csColorTheme,
      csGrayscale,
      csInvGrayscale,
 
      csNumColorScheme,
   };
   ColorScheme colorScheme;
 
   class ColorSchemeEnumSetting : public EnumSetting< ColorScheme > {
       using EnumSetting< ColorScheme >::EnumSetting;
       void Migrate(wxString &value) override;
   };
   static ColorSchemeEnumSetting colorSchemeSetting;
 
   ScaleType scaleType;
 
#ifndef SPECTRAL_SELECTION_GLOBAL_SWITCH
   bool spectralSelection; // But should this vary per track? -- PRL
#endif
 
   typedef int Algorithm;
   enum AlgorithmValues : int {
      algSTFT = 0,
      algReassignment,
      algPitchEAC,
 
      algNumAlgorithms,
   };
   Algorithm algorithm;
 
#ifdef EXPERIMENTAL_FFT_Y_GRID
   bool fftYGrid;
#endif //EXPERIMENTAL_FFT_Y_GRID
 
#ifdef EXPERIMENTAL_FIND_NOTES
   bool fftFindNotes;
   double findNotesMinA;
   int numberOfMaxima;
   bool findNotesQuantize;
#endif //EXPERIMENTAL_FIND_NOTES
 
   // Following fields are derived from preferences.
 
   // Variables used for computing the spectrum
   mutable HFFT           hFFT;
   mutable Floats         window;
 
   // Two other windows for computing reassigned spectrogram
   mutable Floats         tWindow; // Window times time parameter
   mutable Floats         dWindow; // Derivative of window
};
#endif