Bugfix for subtitle loading after hls.stopload() was used

src/controller/subtitle-stream-controller.js

@@ -38,6 +38,19 @@ export class SubtitleStreamController extends BaseStreamController {
     // lastAVStart stores the time in seconds for the start time of a level load
     this.lastAVStart = 0;
     this._onMediaSeeking = this.onMediaSeeking.bind(this);
+    this._onMediaSeeked = this.onMediaSeeked.bind(this);
+  }
+
+  startLoad () {
+    this.stopLoad();
+    this.state = State.IDLE;
+
+    // Check if we already have a track with necessary details to load fragments
+    const currentTrack = this.tracks[this.currentTrackId];
+    if (currentTrack && currentTrack.details) {
+      this.setInterval(TICK_INTERVAL);
+      this.tick();
+    }
   }
 
   onSubtitleFragProcessed (data) {
@@ -79,6 +92,7 @@ export class SubtitleStreamController extends BaseStreamController {
   onMediaAttached ({ media }) {
     this.media = media;
     media.addEventListener('seeking', this._onMediaSeeking);
+    media.addEventListener('seeked', this._onMediaSeeked);
     this.state = State.IDLE;
   }
 
@@ -87,6 +101,7 @@ export class SubtitleStreamController extends BaseStreamController {
       return;
     }
     this.media.removeEventListener('seeking', this._onMediaSeeking);
+    this.media.removeEventListener('seeked', this._onMediaSeeked);
     this.fragmentTracker.removeAllFragments();
     this.currentTrackId = -1;
     this.tracks.forEach((track) => {
@@ -237,6 +252,7 @@ export class SubtitleStreamController extends BaseStreamController {
 
   stopLoad () {
     this.lastAVStart = 0;
+    this.fragPrevious = null;
     super.stopLoad();
   }
 
@@ -245,6 +261,10 @@ export class SubtitleStreamController extends BaseStreamController {
   }
 
   onMediaSeeking () {
-    this.fragPrevious = null;
+    this.stopLoad();
+  }
+
+  onMediaSeeked () {
+    this.startLoad();
   }
 }