From 14a7acf61d0660abeb97bfe35eea604d7d39b388 Mon Sep 17 00:00:00 2001
From: Jeff Keen <jeff@keen.me>
Date: Mon, 30 Sep 2024 12:04:48 -0500
Subject: [PATCH] fix: update check for HLS support to better handle google
 chrome mobile

---
 ember-stereo/src/services/stereo.js        |  2 +
 ember-stereo/src/stereo-connections/hls.js | 67 ++++++++++++++++------
 2 files changed, 51 insertions(+), 18 deletions(-)

diff --git a/ember-stereo/src/services/stereo.js b/ember-stereo/src/services/stereo.js
index b3619861..0909d547 100644
--- a/ember-stereo/src/services/stereo.js
+++ b/ember-stereo/src/services/stereo.js
@@ -394,9 +394,11 @@ export default class Stereo extends Service.extend(EmberEvented) {
       try {
         var strategies = this._buildStrategies(urlsToTry, options);
         if (strategies.filter((s) => s.canPlay).length == 0) {
+          debug('ember-stereo')('all strategies reported canPlay = false');
           return this._handlePreloadError({ urlsToTry, options, strategies });
         }
       } catch (e) {
+        debug('ember-stereo')('error building strategies', e);
         return this._handlePreloadError({
           urlsToTry,
           options,
diff --git a/ember-stereo/src/stereo-connections/hls.js b/ember-stereo/src/stereo-connections/hls.js
index ab3145bd..fbedf822 100644
--- a/ember-stereo/src/stereo-connections/hls.js
+++ b/ember-stereo/src/stereo-connections/hls.js
@@ -9,37 +9,68 @@ import { waitFor } from '@ember/test-waiters';
  * @constructor
  */
 
-export function getMediaSource() {
+function getMediaSource(
+  preferManagedMediaSource = true,
+) {
   if (typeof self === 'undefined') return undefined;
-  return self.MediaSource || self.WebKitMediaSource;
+  const mms =
+    (preferManagedMediaSource || !self.MediaSource) &&
+    (self.ManagedMediaSource );
+  return (
+    mms ||
+    self.MediaSource ||
+    (self.WebKitMediaSource)
+  );
+}
+
+function mimeTypeForCodec(codec, type) {
+  return `${type}/mp4;codecs="${codec}"`;
 }
 
 function getSourceBuffer() {
   return self.SourceBuffer || self.WebKitSourceBuffer;
 }
 
+function isMSESupported() {
+  const mediaSource = getMediaSource();
+  if (!mediaSource) {
+    return false;
+  }
+
+  // if SourceBuffer is exposed ensure its API is valid
+  // Older browsers do not expose SourceBuffer globally so checking SourceBuffer.prototype is impossible
+  const sourceBuffer = getSourceBuffer();
+  return (
+    !sourceBuffer ||
+    (sourceBuffer.prototype &&
+      typeof sourceBuffer.prototype.appendBuffer === 'function' &&
+      typeof sourceBuffer.prototype.remove === 'function')
+  );
+}
+
 export default class HLSSound extends BaseSound {
   static acceptMimeTypes = ['application/vnd.apple.mpegurl'];
   static canUseConnection() {
     // This is copied from the HLS source. We don't want to load all of HLS.js just to check if it can be used
-    const mediaSource = getMediaSource();
-    if (!mediaSource) {
+    if (!isMSESupported()) {
       return false;
     }
-    const sourceBuffer = getSourceBuffer();
-    const isTypeSupported =
-      mediaSource &&
-      typeof mediaSource.isTypeSupported === 'function' &&
-      mediaSource.isTypeSupported('video/mp4; codecs="avc1.42E01E,mp4a.40.2"');
-
-    // if SourceBuffer is exposed ensure its API is valid
-    // Older browsers do not expose SourceBuffer globally so checking SourceBuffer.prototype is impossible
-    const sourceBufferValidAPI =
-      !sourceBuffer ||
-      (sourceBuffer.prototype &&
-        typeof sourceBuffer.prototype.appendBuffer === 'function' &&
-        typeof sourceBuffer.prototype.remove === 'function');
-    return !!isTypeSupported && !!sourceBufferValidAPI;
+
+    const mediaSource = getMediaSource();
+    return (
+      typeof mediaSource?.isTypeSupported === 'function' &&
+      (['avc1.42E01E,mp4a.40.2', 'av01.0.01M.08', 'vp09.00.50.08'].some(
+        (codecsForVideoContainer) =>
+          mediaSource.isTypeSupported(
+            mimeTypeForCodec(codecsForVideoContainer, 'video'),
+          ),
+      ) ||
+        ['mp4a.40.2', 'fLaC'].some((codecForAudioContainer) =>
+          mediaSource.isTypeSupported(
+            mimeTypeForCodec(codecForAudioContainer, 'audio'),
+          ),
+        ))
+    );
   }
 
   static key = 'HLS';