A snippet with slip mode for Mixxx

gistfile1.js

DJTTCueMaster.beatloopInt = function(group, on, beats)
{
	if (on) {
		if (this.bstk.length == 0) {
			
			var slipmodestatus = {
				rate: 		engine.getValue(group, 'rate'),
				startplaypos:	engine.getValue(group, 'playposition'),
				curplaypos:	engine.getValue(group, 'playposition')
			};
			
			var slipmodegroup = group;
			
			DJTTCueMaster.slipmodetime[group] = engine.getValue(group, 'playposition');
			
			DJTTCueMaster.slipmodeconnect[group] = engine.connectControl(group, 'playposition', 
				function(value) {
					try {
						if (value > slipmodestatus.curplaypos) {
							DJTTCueMaster.slipmodetime[slipmodegroup] += value - slipmodestatus.curplaypos;
						}
						else {
							DJTTCueMaster.slipmodetime[slipmodegroup] += value - slipmodestatus.startplaypos;
							DJTTCueMaster.slipmodetime[slipmodegroup] += (engine.getValue(slipmodegroup, 'loop_end_position') / engine.getValue(group, 'track_samples')) - slipmodestatus.curplaypos;
						}
						
						slipmodestatus.curplaypos = value;						
					}
					catch(e) {
						print("ERROR = " + e.message);
					}
				}
			);
		}
		
		this.bstk.push(beats);
		
		
		if (this.bstk.length == 4) {
			if (this.beatcheck(1, 0.5, 0.25, 0.125)) {
				engine.setValue(group, 'beatloop', 0.0625);
			}
			else {
				engine.setValue(group, 'beatloop', beats);
			}
		}
		else {
			engine.setValue(group, 'beatloop', beats);
		}
	}
	else {
		this.bstk.removeValue(beats);
		
		if (this.bstk.length > 0) {
			this.beatloop = this.bstk[(this.bstk.length - 1)];
			engine.setValue(group, 'beatloop', this.beatloop);
		}
		else {
			var oldout = engine.getValue(group, 'loop_end_position') / engine.getValue(group, 'track_samples');
			engine.setValue(group, 'reloop_exit', 1);
			
			var cb = this.slipmodeconnect[group];
			
			engine.beginTimer(20, function() {
				cb.disconnect();
				engine.setValue(group, 'playposition', DJTTCueMaster.slipmodetime[group]);				
			}, true);
		}
	}
}