Add audio playback support to HLS.js handler

public/js/hlsPlayback.js

@@ -1,27 +1,30 @@
 // @license http://www.gnu.org/licenses/agpl-3.0.html AGPL-3.0
 // SPDX-License-Identifier: AGPL-3.0-only
-function playVideo(overlay) {
-    const video = overlay.parentElement.querySelector('video');
-    const url = video.getAttribute("data-url");
-    const startTime = parseFloat(video.getAttribute("data-start") || "0");
-    video.setAttribute("controls", "");
+function playMedia(overlay, tagName) {
+    const media = overlay.parentElement.querySelector(tagName);
+    const url = media.getAttribute("data-url");
+    const startTime = parseFloat(media.getAttribute("data-start") || "0");
+    media.setAttribute("controls", "");
     overlay.style.display = "none";
 
     if (Hls.isSupported()) {
         var hls = new Hls({autoStartLoad: false});
         hls.loadSource(url);
-        hls.attachMedia(video);
+        hls.attachMedia(media);
         hls.on(Hls.Events.MANIFEST_PARSED, function () {
             hls.loadLevel = hls.levels.length - 1;
             hls.startLoad(startTime);
-            video.play();
+            media.play();
         });
-    } else if (video.canPlayType('application/vnd.apple.mpegurl')) {
-        video.src = url;
-        video.addEventListener('canplay', function() {
-            if (startTime > 0) video.currentTime = startTime;
-            video.play();
+    } else if (media.canPlayType('application/vnd.apple.mpegurl')) {
+        media.src = url;
+        media.addEventListener('canplay', function() {
+            if (startTime > 0) media.currentTime = startTime;
+            media.play();
         });
     }
 }
+
+function playVideo(overlay) { playMedia(overlay, 'video'); }
+function playAudio(overlay) { playMedia(overlay, 'audio'); }
 // @license-end