From b274541431bae8a453a6e24111058edb235d6474 Mon Sep 17 00:00:00 2001
From: Gabriel Rivero <gabriel-rivero@users.noreply.github.com>
Date: Thu, 28 Apr 2022 20:17:59 -0400
Subject: [PATCH] VEX-7093: Protect initialization of DRM (#29)

This PR will fix the crash from the experiment on react-native-video

Jira: VEX-7093

velocity PR: crunchyroll/velocity#2443

The crash was caused by using the player object before it was set by another thread, the change simply waits for the player to be available before executing any player interaction after DRM initialization.

Reviews
Major reviewer (domain expert): @jctorresM
Minor reviewer: @jacob-livingston
---
 .../com/brentvatne/exoplayer/ReactExoplayerView.java   | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/android-exoplayer/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java b/android-exoplayer/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java
index 15526b27..7d7a7c0e 100644
--- a/android-exoplayer/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java
+++ b/android-exoplayer/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java
@@ -632,6 +632,16 @@ class ReactExoplayerView extends FrameLayout implements
             mediaSource = new MergingMediaSource(textSourceArray);
         }
 
+        // wait for player to be set
+        while (player == null) {
+            try {
+                wait();
+            } catch (InterruptedException ex) {
+                Thread.currentThread().interrupt();
+                Log.e("ExoPlayer Exception", ex.toString());
+            }
+        }
+
         boolean haveResumePosition = resumeWindow != C.INDEX_UNSET;
         if (haveResumePosition) {
             player.seekTo(resumeWindow, resumePosition);