Loop control script for MPV video player #video #mpv

loops.js

var hotKey = "k";
var numRe = /\d+(?:\.\d+)?/g;
var interval = null;

mp.register_event("file-loaded", function() {
  // Trying to load loops file
  mp.remove_key_binding("loopContinue");
  clearInterval(interval);

  var videoPath = mp.get_property("path");
  var loopsPath = videoPath.replace(/[^.]+$/, "loops.txt");
  if (!mp.utils.file_info(loopsPath)) {
    // file is not exists?
    return;
  }
  var allLoops = [];
  var loopPtr = 0;
  var activeLoop = function() { return allLoops[loopPtr]; };

  var loopsText = mp.utils.read_file(loopsPath);
  var lines = loopsText.split(/[\n\r]+/);
  for (var i = 0; i < lines.length; i++) {
    var m,
      pair = [];
    numRe.lastIndex = 0;
    while ((m = numRe.exec(lines[i])) !== null && pair.length < 2) {
      pair.push(parseFloat(m[0]));
    }
    if (pair.length === 2) {
      allLoops.push(pair);
    }
  }

  if (allLoops.length === 0) {
    return;
  }

  interval = setInterval(function() {
    if (!activeLoop()) {
      return;
    }
    var pos = mp.get_property("time-pos");
    if (pos < activeLoop()[0] || pos > activeLoop()[1]) {
      return;
    }

    mp.osd_message("\u23f8");
  }, 250);

  mp.set_property_number("ab-loop-a", activeLoop()[0]);
  mp.set_property_number("ab-loop-b", activeLoop()[1]);

  mp.add_key_binding(hotKey, "loopContinue", function() {
    if (!activeLoop()) {
      return;
    }
    var pos = mp.get_property("time-pos");
    if (pos < activeLoop()[0]) {
      return;
    }
    loopPtr++;
    mp.osd_message("");
    if (!activeLoop()) {
      mp.set_property("ab-loop-b", "no");
      return;
    }

    mp.set_property_number("ab-loop-a", activeLoop()[0]);
    mp.set_property_number("ab-loop-b", activeLoop()[1]);
  });
});