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/*
What is it?
-----------
Controller for Youtube video playback: Pause/Play (k), Backward (j)/Forward (l), Volume Up (up)/Down (down).
 
The Latest Version
------------------
Versioning is not applicable for this repo.
 
Documentation
-------------
You can read in header of files and, maybe, README for each folder will be created.
 
Requirements
------------
Gyver EncButton library https://github.com/GyverLibs/EncButton
 
Installation
------------
Arduino IDE => Tools => Board => "Arduino Leonardo"
 
Licensing
---------
Please see the file called LICENSE.
 
Contacts
--------
If you have a concrete bug report please contact me via email.
 
Connections
----------
Arduino Leonardo or same
   S1 - D3
   S2 - D2
   Key - D4
 
Miscellaneous
----------
 
Keyboard shortcut   Function
Spacebar              Play/Pause when the seek bar is selected. Activate a button if a button has focus.
k                   Pause/Play in player.
m                   Mute/unmute the video.
Left/Right          Seek backward/forward 5 seconds.
j                   Seek backward 10 seconds in player.
l                   Seek forward 10 seconds in player.
.                   While the video is paused, skip to the next frame.
,                   While the video is paused, go back to the previous frame.
>                   Speed up the video playback rate.
<                   Slow down the video playback rate.
Up/Down             Increase/Decrease volume 5%.
Numbers 1 to 9      Seek to the 10% to 90% of the video.
Number 0              Seek to the beginning of the video.
/                   Go to search box.
f                   Activate full screen. 
c                   Activate closed captions and subtitles if available.
Shift+N               Move to the next video
Shift+P               Move to the previous video.
i                   Open the Miniplayer.
 
Controller for Youtube video playback: 
Pause/Play (k), 
Backward (j)/Forward (l), 
Volume Up (up)/Down (down).
*/
 
#include <Arduino.h>
#include <Keyboard.h>
#include <EncButton.h>
 
const int ENCA = 2;
const int ENCB = 3;
const int BTN = 4;
 
EncButton enc(ENCA, ENCB, BTN);
 
volatile int value = 0;
volatile int step = 3;  //1 шаг за каждые step сигналов энкодера, чтобы снизить чувствительность (так удобнее)
 
void setup() {
  Serial.begin(115200);
 
  enc.setEncType(EB_STEP4_LOW);
 
  // показаны значения по умолчанию
  enc.setBtnLevel(LOW);
  enc.setClickTimeout(500);
  enc.setDebTimeout(50);
  enc.setHoldTimeout(600);
  enc.setStepTimeout(200);
  enc.setEncReverse(0);
  enc.setFastTimeout(30);
}
 
void loop() {
  enc.tick();  // опрос происходит здесь
 
  if (enc.right())
  {
    value = value + step; //поворот вправо
  }
  if (enc.left())
  {
    value = value - step; //поворот влево
  }
 
  if (enc.leftH()) {
    Keyboard.press(KEY_UP_ARROW);
    delay(10);
    Keyboard.releaseAll();
 
  }
  if (enc.rightH()) {
    Keyboard.press(KEY_DOWN_ARROW);
    delay(10);
    Keyboard.releaseAll();
  }
 
  if (enc.click()) {
    Keyboard.press('K');
    delay(10);
    Keyboard.releaseAll();
  }
 
  if (value > 9) {
    Keyboard.press('J'); // каждые value поворотов вправо нажимаем J
    delay(10);
    Keyboard.releaseAll();
    value = 0;
  }
  if (value < -9) {
    Keyboard.press('L'); // каждые value поворотов влево нажимаем 
    delay(10);
    Keyboard.releaseAll();
    value = 0;
  }
}