synaesthesia.h

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#ifndef SYNAETHESIA
#define SYNAETHESIA
 
// C++
#include <array>
 
// MythTV
#include <libmyth/visual.h>
 
// MythMusic
#include "mainvisual.h"
#include "polygon.h"
 
class QImage;
 
static constexpr size_t  LogSize    {         10 };
static constexpr size_t  NumSamples { 1<<LogSize };
static constexpr uint8_t Brightness {        150 };
 
using samp_dbl_array = std::array<double,NumSamples>;
using samp_int_array = std::array<int,NumSamples>;
 
enum Mode {
    Flame = 0,
    Wave  = 1,
    Stars = 2
};
 
class Synaesthesia : public VisualBase
{
public:
    Synaesthesia(void);
    ~Synaesthesia() override;
 
    void resize(const QSize &size) override; // VisualBase
    bool process(VisualNode *node) override; // VisualBase
    bool draw(QPainter *p, const QColor &back) override; // VisualBase
    void handleKeyPress([[maybe_unused]] const QString &action) override {}; // VisualBase
 
private:
    void setupPalette(void);
    void coreInit(void);
    static int bitReverser(int i);
    void fft(double *x, double *y);
    void setStarSize(double lsize);
 
    inline void addPixel(int x, int y, int br1, int br2) const;
    static inline void addPixelFast(unsigned char *p, int br1, int br2);
    inline unsigned char getPixel(int x, int y, int where) const;
 
    inline void fadePixelWave(int x, int y, int where, int step);
    void fadeWave(void);
    inline void fadePixelHeat(int x, int y, int where, int step);
    void fadeHeat(void);
    void fadeFade(void) const;
    void fade(void);
 
    QSize m_size                 {0,0};
 
    samp_dbl_array      m_cosTable    {};
    samp_dbl_array      m_negSinTable {};
    samp_int_array      m_bitReverse  {};
    std::array<int,256> m_scaleDown   {};
    int    m_maxStarRadius       {1};
    int    m_fadeMode            {Stars};
    bool   m_pointsAreDiamonds   {true};
    double m_brightnessTwiddler  {0.3};
    double m_starSize            {0.5};
 
    int    m_outWidth            {0};
    int    m_outHeight           {0};
 
    Bitmap<unsigned short> m_outputBmp;
    Bitmap<unsigned short> m_lastOutputBmp;
    Bitmap<unsigned short> m_lastLastOutputBmp;
    QImage *m_outputImage        {nullptr};
 
    std::array<uint8_t,768>  m_palette {};
    double m_fgRedSlider         {0.0};
    double m_fgGreenSlider       {0.5};
    double m_bgRedSlider         {0.75};
    double m_bgGreenSlider       {0.4};
 
    double m_energyAvg           {80.0};
};
 
#endif // SYNAETHESIA