Fix PlayReady key endianness (#7510)

Author: ShubhamSharma2311

src/controller/eme-controller.ts

@@ -12,6 +12,7 @@ import {
   removeEventListener,
 } from '../utils/event-listener-helper';
 import { arrayToHex } from '../utils/hex';
+import { changeEndianness } from '../utils/keysystem-util';
 import { Logger } from '../utils/logger';
 import {
   getKeySystemsForConfig,
@@ -881,6 +882,10 @@ class EMEController extends Logger implements ComponentAPI {
     const sessionLevelKeyId = arrayToHex(
       new Uint8Array(mediaKeySessionContext.decryptdata.keyId || []),
     );
+
+    let hasMatchedKey = false;
+    const keyStatuses: { status: MediaKeyStatus; keyId: string }[] = [];
+
     mediaKeySessionContext.mediaKeysSession.keyStatuses.forEach(
       (status: MediaKeyStatus, keyId: BufferSource) => {
         // keyStatuses.forEach is not standard API so the callback value looks weird on xboxone
@@ -890,27 +895,79 @@ class EMEController extends Logger implements ComponentAPI {
           keyId = status;
           status = temp;
         }
-        const keyIdWithStatusChange = arrayToHex(
+
+        const keyIdArray: Uint8Array =
           'buffer' in keyId
             ? new Uint8Array(keyId.buffer, keyId.byteOffset, keyId.byteLength)
-            : new Uint8Array(keyId),
+            : new Uint8Array(keyId);
+
+        // Handle PlayReady little-endian key ID conversion for status comparison only
+        // Don't modify the original key ID from playlist parsing
+        if (
+          mediaKeySessionContext.keySystem === KeySystems.PLAYREADY &&
+          keyIdArray.length === 16
+        ) {
+          changeEndianness(keyIdArray);
+        }
+
+        const keyIdWithStatusChange = arrayToHex(
+          keyIdArray as Uint8Array<ArrayBuffer>,
         );
 
+        // Store all key statuses for processing
+        keyStatuses.push({ status, keyId: keyIdWithStatusChange });
+
         // Error immediately when encountering a key ID with this status again
         if (status === 'internal-error') {
           this.bannedKeyIds[keyIdWithStatusChange] = status;
         }
 
-        // Only acknowledge status changes for level-key ID
+        // Check if this key matches the session-level key ID
         const matched = keyIdWithStatusChange === sessionLevelKeyId;
-        this.log(
-          `${matched ? '' : 'un'}matched key status change "${status}" for keyStatuses keyId: ${keyIdWithStatusChange} session keyId: ${sessionLevelKeyId} uri: ${mediaKeySessionContext.decryptdata.uri}`,
-        );
         if (matched) {
+          hasMatchedKey = true;
           mediaKeySessionContext.keyStatus = status;
+          this.log(
+            `matched key status change "${status}" for keyStatuses keyId: ${keyIdWithStatusChange} session keyId: ${sessionLevelKeyId} uri: ${mediaKeySessionContext.decryptdata.uri}`,
+          );
+        } else {
+          this.log(
+            `unmatched key status change "${status}" for keyStatuses keyId: ${keyIdWithStatusChange} session keyId: ${sessionLevelKeyId} uri: ${mediaKeySessionContext.decryptdata.uri}`,
+          );
         }
       },
     );
+
+    // Handle case where no keys matched but all have the same status
+    // This can happen with PlayReady when key IDs don't align properly
+    if (!hasMatchedKey && keyStatuses.length > 0) {
+      const firstStatus = keyStatuses[0].status;
+      const allSameStatus = !keyStatuses.some(
+        ({ status }) => status !== firstStatus,
+      );
+
+      if (
+        allSameStatus &&
+        (firstStatus === 'usable' || firstStatus.startsWith('usable'))
+      ) {
+        this.log(
+          `No key matched session keyId ${sessionLevelKeyId}, but all keys have usable status "${firstStatus}". Treating as usable.`,
+        );
+        mediaKeySessionContext.keyStatus = firstStatus;
+      } else if (
+        allSameStatus &&
+        (firstStatus === 'internal-error' || firstStatus === 'expired')
+      ) {
+        this.log(
+          `No key matched session keyId ${sessionLevelKeyId}, but all keys have error status "${firstStatus}". Applying to session.`,
+        );
+        mediaKeySessionContext.keyStatus = firstStatus;
+      } else {
+        this.log(
+          `No key matched session keyId ${sessionLevelKeyId}. Key statuses: ${keyStatuses.map(({ keyId, status }) => `${keyId}:${status}`).join(', ')}`,
+        );
+      }
+    }
   }
 
   private fetchServerCertificate(