From 528e9ed23d2b67f88dbcb739ae885dcca703ecbc Mon Sep 17 00:00:00 2001
From: Adam Waldron <awaldron@brightcove.com>
Date: Mon, 20 Feb 2023 13:33:16 -0800
Subject: [PATCH] fix: emsg ie11 test failures

---
 lib/mp4/emsg.js        | 4 +++-
 test/mp4-probe.test.js | 8 ++++----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/lib/mp4/emsg.js b/lib/mp4/emsg.js
index 87a2cd93..052ade84 100644
--- a/lib/mp4/emsg.js
+++ b/lib/mp4/emsg.js
@@ -1,3 +1,5 @@
+const { getUint64 } = require('../utils/numbers.js');
+
 var uint8ToCString = require('../utils/string.js').uint8ToCString;
 
 /**
@@ -40,7 +42,7 @@ var parseEmsgBox = function(boxData) {
     var dv = new DataView(boxData.buffer);
     timescale = dv.getUint32(offset);
     offset += 4;
-    presentation_time = Number(dv.getBigUint64(offset));
+    presentation_time = getUint64(boxData.subarray(offset));
     offset += 8;
     event_duration = dv.getUint32(offset);
     offset += 4;
diff --git a/test/mp4-probe.test.js b/test/mp4-probe.test.js
index f62038d1..db5f31ef 100644
--- a/test/mp4-probe.test.js
+++ b/test/mp4-probe.test.js
@@ -151,7 +151,7 @@ QUnit.test('can get ID3 data from a v0 EMSG box', function(assert) {
   );
 
   var v0EmsgId3Data = mp4Helpers.generateEmsgBoxData(0, id3Data);
-  var emsgId3Box = new Uint8Array(box('emsg', Array.from(v0EmsgId3Data)));
+  var emsgId3Box = new Uint8Array(box('emsg', [].slice.call(v0EmsgId3Data)));
   var emsgBoxes = probe.getEmsgID3(emsgId3Box, 10);
   assert.equal(emsgBoxes[0].cueTime, 20, 'got correct emsg cueTime value from v0 emsg');
   assert.equal(emsgBoxes[0].duration, 0, 'got correct emsg duration value from v0 emsg');
@@ -169,7 +169,7 @@ QUnit.test('can get ID3 data from a v1 EMSG box', function(assert) {
   );
 
   var v1EmsgId3Data = mp4Helpers.generateEmsgBoxData(1, id3Data);
-  var emsgId3Box = new Uint8Array(box('emsg', Array.from(v1EmsgId3Data)));
+  var emsgId3Box = new Uint8Array(box('emsg', [].slice.call(v1EmsgId3Data)));
   var emsgBoxes = probe.getEmsgID3(emsgId3Box);
   assert.equal(emsgBoxes[0].cueTime, 100, 'got correct emsg cueTime value from v1 emsg');
   assert.equal(emsgBoxes[0].duration, 0.01, 'got correct emsg duration value from v1 emsg');
@@ -192,10 +192,10 @@ QUnit.test('can get ID3 data from multiple EMSG boxes', function(assert) {
   );
 
   var v1EmsgId3Data = mp4Helpers.generateEmsgBoxData(1, v1id3Data);
-  var v1emsgId3Box = new Uint8Array(box('emsg', Array.from(v1EmsgId3Data)));
+  var v1emsgId3Box = new Uint8Array(box('emsg', [].slice.call(v1EmsgId3Data)));
 
   var v0EmsgId3Data = mp4Helpers.generateEmsgBoxData(0, v0id3Data);
-  var v0emsgId3Box = new Uint8Array(box('emsg', Array.from(v0EmsgId3Data)));
+  var v0emsgId3Box = new Uint8Array(box('emsg', [].slice.call(v0EmsgId3Data)));
 
   var multiBoxData = new Uint8Array(v1emsgId3Box.length + v0emsgId3Box.length);
   multiBoxData.set(v1emsgId3Box);