feat: add support for setting persistentState in supportedConfigurati…

…ons (#102)

README.md

@@ -284,7 +284,7 @@ Below is an example of using one of these DRM systems and custom `getLicense()`
 
 In addition to `audioContentType` and `videoContentType` posted above, it is possible to directly provide the `supportedConfigurations` array to use for the `requestMediaKeySystemAccess` call. This allows for the entire range of options specified by the [MediaKeySystemConfiguration] object.
 
-Note that if `supportedConfigurations` is provided, it will override `audioContentType`, `videoContentType`, `audioRobustness`, and `videoRobustness`.
+Note that if `supportedConfigurations` is provided, it will override `audioContentType`, `videoContentType`, `audioRobustness`, `videoRobustness`, and `persistentState`.
 
 Example:
 

src/eme.js

@@ -25,6 +25,7 @@ export const getSupportedConfigurations = (keySystemOptions) => {
   const audioRobustness = keySystemOptions.audioRobustness;
   const videoContentType = keySystemOptions.videoContentType;
   const videoRobustness = keySystemOptions.videoRobustness;
+  const persistentState = keySystemOptions.persistentState;
 
   if (audioContentType || audioRobustness) {
     supportedConfiguration.audioCapabilities = [
@@ -44,6 +45,10 @@ export const getSupportedConfigurations = (keySystemOptions) => {
     ];
   }
 
+  if (persistentState) {
+    supportedConfiguration.persistentState = persistentState;
+  }
+
   return [supportedConfiguration];
 };
 

test/eme.test.js

@@ -1105,6 +1105,14 @@ QUnit.test('includes audio and video content types and robustness', function(ass
   );
 });
 
+QUnit.test('includes persistentState', function(assert) {
+  assert.deepEqual(
+    getSupportedConfigurations({ persistentState: 'optional' }),
+    [{ persistentState: 'optional' }],
+    'included persistentState'
+  );
+});
+
 QUnit.test('uses supportedConfigurations directly if provided', function(assert) {
   assert.deepEqual(
     getSupportedConfigurations({