From 79cadba0e70310e68db48a9650468c9b10986efe Mon Sep 17 00:00:00 2001
From: Agajan Jumakuliyev <agajan.tm@gmail.com>
Date: Sun, 22 Sep 2024 17:41:49 -0700
Subject: [PATCH] Update index.js

To avoid application crash, don't add encryptionScheme field to some platforms.
---
 index.js | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/index.js b/index.js
index 6b0bc37..4ea9833 100644
--- a/index.js
+++ b/index.js
@@ -460,13 +460,19 @@ class McEncryptionSchemePolyfill {
     const mediaCapKeySystemConfig = decodingConfig.keySystemConfiguration;
     const audioCapabilities = [];
     const videoCapabilities = [];
+    const isLegacyPlatform = /PlayStation 4|Sky_STB/i.test(navigator.userAgent);
 
     if (mediaCapKeySystemConfig.audio) {
       const capability = {
         robustness: mediaCapKeySystemConfig.audio.robustness || '',
         contentType: decodingConfig.audio.contentType,
-        encryptionScheme: mediaCapKeySystemConfig.audio.encryptionScheme,
       };
+      // Exclude encryptionScheme for legacy platforms to prevent crashes
+      if (!isLegacyPlatform) {
+        capability.encryptionScheme =
+            mediaCapKeySystemConfig.audio.encryptionScheme;
+      }
+
       audioCapabilities.push(capability);
     }
 
@@ -474,8 +480,13 @@ class McEncryptionSchemePolyfill {
       const capability = {
         robustness: mediaCapKeySystemConfig.video.robustness || '',
         contentType: decodingConfig.video.contentType,
-        encryptionScheme: mediaCapKeySystemConfig.video.encryptionScheme,
       };
+      // Exclude encryptionScheme for legacy platforms to prevent crashes
+      if (!isLegacyPlatform) {
+        capability.encryptionScheme =
+            mediaCapKeySystemConfig.video.encryptionScheme;
+      }
+
       videoCapabilities.push(capability);
     }