From 3e77cb55fb8d1e46a25795443d8dee2ed1953df0 Mon Sep 17 00:00:00 2001
From: Niklas Korz <niklas@niklaskorz.de>
Date: Fri, 15 Nov 2024 09:55:01 +0100
Subject: [PATCH] Consider ManagedSourceBuffer in MSE support detection

---
 src/is-supported.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/is-supported.ts b/src/is-supported.ts
index bbf3b3214f2..d5e59845c42 100644
--- a/src/is-supported.ts
+++ b/src/is-supported.ts
@@ -2,8 +2,13 @@ import { mimeTypeForCodec } from './utils/codecs';
 import { getMediaSource } from './utils/mediasource-helper';
 import type { ExtendedSourceBuffer } from './types/buffer';
 
-function getSourceBuffer(): typeof self.SourceBuffer {
-  return self.SourceBuffer || (self as any).WebKitSourceBuffer;
+function getSourceBuffer(
+  preferManagedSourceBuffer = true,
+): typeof self.SourceBuffer {
+  const msb =
+    (preferManagedSourceBuffer || !self.SourceBuffer) &&
+    ((self as any).ManagedSourceBuffer as undefined | typeof self.SourceBuffer);
+  return msb || self.SourceBuffer || (self as any).WebKitSourceBuffer;
 }
 
 export function isMSESupported(): boolean {