From 1cfd0135846f02cfd97feb5a4ba3faa11749ea45 Mon Sep 17 00:00:00 2001
From: brandonocasey <brandonocasey@gmail.com>
Date: Tue, 26 Feb 2019 17:17:21 -0500
Subject: [PATCH] fix: only fire seekablechange on a change

---
 src/master-playlist-controller.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/master-playlist-controller.js b/src/master-playlist-controller.js
index 2b6b45e6c..d0717c095 100644
--- a/src/master-playlist-controller.js
+++ b/src/master-playlist-controller.js
@@ -922,6 +922,14 @@ export class MasterPlaylistController extends videojs.EventTarget {
       }
     }
 
+    let oldEnd;
+    let oldStart;
+
+    if (this.seekable_ && this.seekable_.length) {
+      oldEnd = this.seekable_.end(0);
+      oldStart = this.seekable_.start(0);
+    }
+
     if (!audioSeekable) {
       // seekable has been calculated based on buffering video data so it
       // can be returned directly
@@ -939,6 +947,13 @@ export class MasterPlaylistController extends videojs.EventTarget {
       ]]);
     }
 
+    // seekable is the same as last time
+    if (this.seekable_ && this.seekable_.length) {
+      if (this.seekable_.end(0) === oldEnd && this.seekable_.start(0) === oldStart) {
+        return;
+      }
+    }
+
     this.logger_(`seekable updated [${Ranges.printableRange(this.seekable_)}]`);
 
     this.tech_.trigger('seekablechanged');