feat(HLS): Add support for getting license server url for PlayReady (#7790)

lib/hls/hls_parser.js

@@ -11,6 +11,7 @@ goog.require('goog.Uri');
 goog.require('goog.asserts');
 goog.require('shaka.abr.Ewma');
 goog.require('shaka.drm.DrmUtils');
+goog.require('shaka.drm.PlayReady');
 goog.require('shaka.hls.Attribute');
 goog.require('shaka.hls.ManifestTextParser');
 goog.require('shaka.hls.Playlist');
@@ -24,6 +25,7 @@ goog.require('shaka.media.PresentationTimeline');
 goog.require('shaka.media.QualityObserver');
 goog.require('shaka.media.SegmentIndex');
 goog.require('shaka.media.SegmentReference');
+goog.require('shaka.media.SegmentUtils');
 goog.require('shaka.net.DataUriPlugin');
 goog.require('shaka.net.NetworkingEngine');
 goog.require('shaka.net.NetworkingEngine.PendingRequest');
@@ -39,7 +41,6 @@ goog.require('shaka.util.MimeUtils');
 goog.require('shaka.util.Networking');
 goog.require('shaka.util.OperationManager');
 goog.require('shaka.util.Pssh');
-goog.require('shaka.media.SegmentUtils');
 goog.require('shaka.util.Timer');
 goog.require('shaka.util.TsParser');
 goog.require('shaka.util.TXml');
@@ -4863,6 +4864,15 @@ shaka.hls.HlsParser = class {
           {initDataType: 'cenc', initData: pssh},
         ]);
 
+    const input = shaka.util.TXml.parseXmlString([
+      '<PLAYREADY>',
+      shaka.util.Uint8ArrayUtils.toBase64(data),
+      '</PLAYREADY>',
+    ].join('\n'));
+    if (input) {
+      drmInfo.licenseServerUri = shaka.drm.PlayReady.getLicenseUrl(input);
+    }
+
     return drmInfo;
   }