fix: Sony Bravia TV Playready DRM Failure (#8577)

Fixes #8576
Browser on this Sony TV returns little-endian, which results in
false-positive unsupported key system. Looks like this is a known issue
impacting couple of other platforms as well. I need to add this TV as
well.

Author: agajassi

lib/drm/drm_engine.js

@@ -1737,7 +1737,9 @@ shaka.drm.DrmEngine = class {
       if (shaka.drm.DrmUtils.isPlayReadyKeySystem(
           this.currentDrmInfo_.keySystem) &&
           keyId.byteLength == 16 &&
-          (shaka.util.Platform.isEdge() || shaka.util.Platform.isPS4())) {
+          (shaka.util.Platform.isEdge() ||
+          shaka.util.Platform.isPS4() ||
+          shaka.util.Platform.isSonyTV())) {
         // Read out some fields in little-endian:
         const dataView = shaka.util.BufferUtils.toDataView(keyId);
         const part0 = dataView.getUint32(0, /* LE= */ true);

lib/util/platform.js

@@ -341,6 +341,14 @@ shaka.util.Platform = class {
     return shaka.util.Platform.userAgentContains_('PlayStation 4');
   }
 
+  /**
+   * Check if the current platform is Sony TV.
+   * @return {boolean}
+   */
+  static isSonyTV() {
+    return shaka.util.Platform.userAgentContains_('sony.hbbtv.tv.G5');
+  }
+
   /**
    * Check if the current platform is Hisense.
    * @return {boolean}

project-words.txt

@@ -180,6 +180,7 @@ Clearkey
 Clearkeys
 Clutz
 codem
+hbbtv
 Conax
 cvox
 expressjs