From 40a2b7368d337f834085f0e1125cf742d72693ac Mon Sep 17 00:00:00 2001
From: Christian Franke <christian.franke@picturepipe.com>
Date: Fri, 11 Nov 2022 14:20:24 +0100
Subject: [PATCH] Handle AirPlay key events properly

Fixes: https://github.com/videojs/videojs-contrib-eme/issues/159
---
 src/plugin.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/plugin.js b/src/plugin.js
index 53cb8e9..9f75ae1 100644
--- a/src/plugin.js
+++ b/src/plugin.js
@@ -227,6 +227,21 @@ const onPlayerReady = (player, emeError) => {
 
   setupSessions(player);
 
+  /*
+   * If playback is switched to AirPlay, we will receive another encrypted event,
+   * proxied from the AirPlay device, as is described here:
+   *
+   * https://developer.apple.com/streaming/fps/FairPlayStreamingOverview.pdf
+   *
+   * To accomodate for this, we should clear our list of sessions when the playback
+   * target changes, because the request is otherwise dropped as a duplicate.
+   */
+  if ('webkitCurrentPlaybackTargetIsWireless' in player.tech_.el_) {
+    player.tech_.el_.addEventListener('webkitcurrentplaybacktargetiswirelesschanged', () => {
+      player.eme.sessions = [];
+    });
+  }
+
   if (window.MediaKeys) {
     // Support EME 05 July 2016
     // Chrome 42+, Firefox 47+, Edge, Safari 12.1+ on macOS 10.14+