Getting links to audio without VKApi

var id = 0; //Ваш useridvar n = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMN0PQRSTUVWXYZO123456789+/=",
	i = {
		v: function(e) {
			return e.split("").reverse().join("")
		},
		r: function(e, t) {
			e = e.split("");
			for (var i, o = n + n, s = e.length; s--;) i = o.indexOf(e[s]), ~i && (e[s] = o.substr(i - t, 1));
			return e.join("")
		},
		s: function(e, t) {
			var n = e.length;
			if (n) {
				var i = r(e, t),
					o = 0;
				for (e = e.split(""); ++o < n;) e[o] = e.splice(i[n - 1 - o], 1, e[o])[0];
				e = e.join("")
			}
			return e
		},
		i: function(e, t) {
			return i.s(e, t ^ id)
		},
		x: function(e, t) {
			var n = [];
			return t = t.charCodeAt(0), each(e.split(""), function(e, i) {
				n.push(String.fromCharCode(i.charCodeAt(0) ^ t))
			}), n.join("")
		}
	};
functiono() {
	returnwindow.wbopen && ~(window.open + "").indexOf("wbopen")
}
functions(e) {
	if (!o() && ~e.indexOf("audio_api_unavailable")) {
		var t = e.split("?extra=")[1].split("#"),
			n = "" === t[1] ? "" : a(t[1]);
		if (t = a(t[0]), "string" != typeof n || !t) return e;
		n = n ? n.split(String.fromCharCode(9)) : [];
		for (var s, r, l = n.length; l--;) {
			if (r = n[l].split(String.fromCharCode(11)), s = r.splice(0, 1, t)[0], !i[s]) return e;
			t = i[s].apply(null, r)
		}
		if (t && "http" === t.substr(0, 4)) return t
	}
	return e
}
functiona(e) {
	if (!e || e.length % 4 == 1) return !1;
	for (var t, i, o = 0, s = 0, a = ""; i = e.charAt(s++);) i = n.indexOf(i), ~i && (t = o % 4 ? 64 * t + i : i, o++ % 4) && (a += String.fromCharCode(255 & t >> (-2 * o & 6)));
	return a
}
functionr(e, t) {
	var n = e.length,
		i = [];
	if (n) {
		var o = n;
		for (t = Math.abs(t); o--;) t = (n * (o + 1) ^ t + o) % n, i[o] = t
	}
	return i
}

global $n, $i, $id;
$n = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMN0PQRSTUVWXYZO123456789+/=";
$id = 123456789; //user_id
$i = [
	'v' => function($e){
		return strrev($e);
	},
	'r' => function($e, $t){
		global $n;
		$e = str_split($e);
		for ($o = $n . $n, $s = count($e); $s--;){
			$i = stripos($o, $e[$s]);
			if(~$i){
				$e[$s] = substr($o, $i - $t, 1);
			}
		}
		return implode("", $e);
	},
	's' => function($e, $t){
		$n = strlen($e);
		if ($n) {
			$i = r($e, $t);
			$o = 0;
			$e = str_split($e);
			for (; ++$o < $n;){
				$p = array_splice($e, $i[$n - 1 - $o], 1, $e[$o]);
				$e[$o] = $p[0];
			}
			$e = implode("", $e);
		}
		return $e;
	},
	'i' => function($e, $t){
		global $i, $id;
		$k = $i['s'];
		return $k($e, $t ^ $id);
	},
];
functiono(){
	returnfalse;
}
functiona($e){
	global $n;
	if (!$e || strlen($e) % 4 == 1) {
		return !1;
	}
	$s = 0;
	for ($o = 0, $a = "";$s < strlen($e);) {
		$i = $e[$s++];
		$i = strpos($n, $i);
		if ($i !== false) {
			$t = ($o % 4) ? 64 * $t + $i : $i;
			if ($o++ % 4) {
				$a .= chr(255 & $t >> (-2 * $o & 6));
			}
		}
	}
	return $a;
}
functionr($e, $t){
	$n = strlen($e);
	$i = [];
	if ($n) {
		$o = $n;
		$t = abs($t);
		for (; $o--;){
			$t = ($n * ($o + 1) ^ $t + $o) % $n;
			$i[$o] = $t;
		}
	}
	return $i;
}
functions($e){
	global $i;
	if (!o() && strpos($e, "audio_api_unavailable") !== false) {
		$t = explode("?extra=", $e);
		$t = $t[1];
		$t = explode("#", $t);
		$n = ("" === $t[1]) ? "" : a($t[1]);
		$t = a($t[0]);
		if (!is_string($n) || !$t){ return $e;}
		$n = $n ? explode(chr(9), $n) : [];
		for ($l = count($n); $l--;) {
			$r = explode(chr(11), $n[$l]);
			$s = array_splice($r, 0, 1, $t);
			$s = $s[0];
			if (!$i[$s]){ return $e; }
			$t = $i[$s](...$r);
		}
		if ($t && "http" === substr($t, 0, 4)){ return $t;}
	}
	return $e;
}