Multiple fixes

- increase WLED_MAX_BUSSES for C3 (fixes #4215)
- fix for #4228
- fix for very long running effect (strip.now, strip.timebase)
- C++ API change to allow `seg.setColor().setOpacity()`

wled00/FX.h

@@ -525,12 +525,12 @@ typedef struct Segment {
     inline static const CRGBPalette16 &getCurrentPalette() { return Segment::_currentPalette; }
 
     void    setUp(uint16_t i1, uint16_t i2, uint8_t grp=1, uint8_t spc=0, uint16_t ofs=UINT16_MAX, uint16_t i1Y=0, uint16_t i2Y=1);
-    bool    setColor(uint8_t slot, uint32_t c); //returns true if changed
-    void    setCCT(uint16_t k);
-    void    setOpacity(uint8_t o);
-    void    setOption(uint8_t n, bool val);
-    void    setMode(uint8_t fx, bool loadDefaults = false);
-    void    setPalette(uint8_t pal);
+    Segment &setColor(uint8_t slot, uint32_t c);
+    Segment &setCCT(uint16_t k);
+    Segment &setOpacity(uint8_t o);
+    Segment &setOption(uint8_t n, bool val);
+    Segment &setMode(uint8_t fx, bool loadDefaults = false);
+    Segment &setPalette(uint8_t pal);
     uint8_t differs(Segment& b) const;
     void    refreshLightCapabilities();
 
@@ -545,7 +545,7 @@ typedef struct Segment {
       * Call resetIfRequired before calling the next effect function.
       * Safe to call from interrupts and network requests.
       */
-    inline void markForReset() { reset = true; }  // setOption(SEG_OPTION_RESET, true)
+    inline Segment &markForReset() { reset = true; return *this; }  // setOption(SEG_OPTION_RESET, true)
 
     // transition functions
     void     startTransition(uint16_t dur);     // transition has to start before actual segment values change
@@ -599,9 +599,15 @@ typedef struct Segment {
     }
 
     // 2D matrix
-    [[gnu::hot]] uint16_t virtualWidth()  const; // segment width in virtual pixels (accounts for groupping and spacing)
-    [[gnu::hot]] uint16_t virtualHeight() const; // segment height in virtual pixels (accounts for groupping and spacing)
-    uint16_t nrOfVStrips() const;                // returns number of virtual vertical strips in 2D matrix (used to expand 1D effects into 2D)
+    [[gnu::hot]] unsigned virtualWidth()  const; // segment width in virtual pixels (accounts for groupping and spacing)
+    [[gnu::hot]] unsigned virtualHeight() const; // segment height in virtual pixels (accounts for groupping and spacing)
+    inline unsigned nrOfVStrips() const {        // returns number of virtual vertical strips in 2D matrix (used to expand 1D effects into 2D)
+    #ifndef WLED_DISABLE_2D
+      return (is2D() &&  map1D2D == M12_pBar) ? virtualWidth() : 1;
+    #else
+      return 1;
+    #endif
+    }
   #ifndef WLED_DISABLE_2D
     [[gnu::hot]] uint16_t XY(int x, int y);      // support function to get relative index within segment
     [[gnu::hot]] void setPixelColorXY(int x, int y, uint32_t c); // set relative pixel within segment with color
@@ -778,7 +784,8 @@ class WS2812FX {  // 96 bytes
       setTargetFps(uint8_t fps),
       setupEffectData();                          // add default effects to the list; defined in FX.cpp
 
-    inline void restartRuntime()          { for (Segment &seg : _segments) seg.markForReset(); }
+    inline void resetTimebase()           { timebase = 0UL - millis(); }
+    inline void restartRuntime()          { for (Segment &seg : _segments) { seg.markForReset().resetIfRequired(); } }
     inline void setTransitionMode(bool t) { for (Segment &seg : _segments) seg.startTransition(t ? _transitionDur : 0); }
     inline void setColor(uint8_t slot, uint8_t r, uint8_t g, uint8_t b, uint8_t w = 0)    { setColor(slot, RGBW32(r,g,b,w)); }
     inline void setPixelColor(unsigned n, uint8_t r, uint8_t g, uint8_t b, uint8_t w = 0) { setPixelColor(n, RGBW32(r,g,b,w)); }
@@ -834,10 +841,8 @@ class WS2812FX {  // 96 bytes
     inline uint16_t getLength() const       { return _length; }           // returns actual amount of LEDs on a strip (2D matrix may have less LEDs than W*H)
     inline uint16_t getTransition() const   { return _transitionDur; }    // returns currently set transition time (in ms)
 
-    uint32_t
-      now,
-      timebase,
-      getPixelColor(uint16_t) const;
+    unsigned long now, timebase;
+    uint32_t getPixelColor(unsigned) const;
 
     inline uint32_t getLastShow() const       { return _lastShow; }           // returns millis() timestamp of last strip.show() call
     inline uint32_t segColor(uint8_t i) const { return _colors_t[i]; }        // returns currently valid color (for slot i) AKA SEGCOLOR(); may be blended between two colors while in transition