fix: Fix MediaSourceEngine reset operation (#5576)

lib/media/media_source_engine.js

@@ -1562,16 +1562,34 @@ shaka.media.MediaSourceEngine = class {
    * @private
    */
   async reset_(streamsByType) {
+    const Functional = shaka.util.Functional;
     this.reloadingMediaSource_ = true;
     const currentTime = this.video_.currentTime;
     try {
       this.eventManager_.removeAll();
-      this.sourceBuffers_ = {};
 
       const cleanup = [];
       for (const contentType in this.transmuxers_) {
         cleanup.push(this.transmuxers_[contentType].destroy());
       }
+      for (const contentType in this.queues_) {
+        // Make a local copy of the queue and the first item.
+        const q = this.queues_[contentType];
+        const inProgress = q[0];
+
+        // Drop everything else out of the original queue.
+        this.queues_[contentType] = q.slice(0, 1);
+
+        // We will wait for this item to complete/fail.
+        if (inProgress) {
+          cleanup.push(inProgress.p.catch(Functional.noop));
+        }
+
+        // The rest will be rejected silently if possible.
+        for (const item of q.slice(1)) {
+          item.p.reject(shaka.util.Destroyer.destroyedError());
+        }
+      }
       for (const contentType in this.sourceBuffers_) {
         const sourceBuffer = this.sourceBuffers_[contentType];
         try {
@@ -1580,6 +1598,8 @@ shaka.media.MediaSourceEngine = class {
       }
       await Promise.all(cleanup);
       this.transmuxers_ = {};
+      this.queues_ = {};
+      this.sourceBuffers_ = {};
 
       const previousDuration = this.mediaSource_.duration;
       this.mediaSourceOpen_ = new shaka.util.PublicPromise();