Encoder acceleration (including MD_REncoder in GenericMIDIRotaryEncoder)

[spamanski]

Hi again,
thanks to your help, I'm near the completion of my controller.
One last thing I'd love to implement is encoder acceleration (coarse/fine at fast/slow rotation speeds), which would be the icing on the cake. As far as I see, there's no direct implementation for this in your library (I only found long/short press for buttons), but I found your hint on the arduino forum regarding the use of MD_REncoder:

If you're using the Control Surface library, you can plug in your own encoder types into the existing GenericMIDIRotaryEncoder class:

#include <Control_Surface.h>

struct MyCustomEncoder {
    MyCustomEncoder(uint8_t pinA, uint8_t pinB) { /* ... */ }
    void begin() { /* ... */ } // optional
    uint8_t read() { return 42; } // preferably returns an unsigned type
};

using MyCustomMIDIEncoder = GenericMIDIRotaryEncoder<MyCustomEncoder, RelativeCCSender>;

MyCustomMIDIEncoder enc {
    {2, 3}, // MyCustomEncoder constructor
    MIDI_CC::Channel_Volume, // MIDI address
    1, 4, // Multiplier and pulses per step
    // ↑ set to 1 if encoder library already handles this
    {}, // MIDI sender initialization (unused in this example)
};

USBMIDI_Interface midi;

void setup() { Control_Surface.begin(); }
void loop() { Control_Surface.loop(); }

The idea is that you implement the required functionality in the MyCustomEncoder struct. It should contain a MD_REncoder member variable (or reference/pointer to it), and you should implement the MyCustomEncoder::begin() function to initialize the MD_REncoder. MyCustomEncoder::read() should update and return the position of the encoder (modulo 256).

This seems to be the way to do it, but looking at the few other structures with GenericMIDIRotaryEncoder that I found here, I can't make sense of how to "bake" MD_REncoder into that structure.
If it's not too much to ask, would you give me another hint? Or are there any similar examples that I haven't found yet to have a look at?