chore: Move eme-encryption-scheme-polyfill to the Shaka Player repo (#8818)

We want to apply several optimizations to MCap and Shaka management,
which makes everything easier if the code is in this repo.

Author: avelad

build/types/polyfill

@@ -1,7 +1,9 @@
 # Polyfills used to emulate missing browsers features.
 
-+../../node_modules/eme-encryption-scheme-polyfill/index.js
-+../../lib/polyfill/encryption_scheme.js
++../../lib/polyfill/eme_encryption_scheme.js
++../../lib/polyfill/encryption_scheme_media_key_system_access.js
++../../lib/polyfill/encryption_scheme_utils.js
++../../lib/polyfill/mcap_encryption_scheme.js
 +../../lib/polyfill/mediasource.js
 +../../lib/polyfill/media_capabilities.js
 +../../lib/polyfill/patchedmediakeys_cert.js

demo/cast_receiver/index.html

@@ -47,8 +47,6 @@
   // Bootstrap the Shaka Player library through the Closure library.
   '../../node_modules/google-closure-library/closure/goog/base.js',
   '../../dist/deps.js',
-  // Compiled into Shaka Player, but outside of the Closure deps system.
-  '../../node_modules/eme-encryption-scheme-polyfill/index.js',
   // This file contains goog.require calls for all exported library classes.
   '../../shaka-player.uncompiled.js',
   // These are the individual parts of the receiver app.

demo/index.html

@@ -77,8 +77,6 @@
   '../dist/deps.js',
   // This is required for goog.asserts.
   '../lib/debug/asserts.js',
-  // Compiled into Shaka Player, but outside of the Closure deps system.
-  '../node_modules/eme-encryption-scheme-polyfill/index.js',
   // This file contains goog.require calls for all exported library classes.
   '../shaka-player.uncompiled.js',
   // Enable less, the CSS pre-processor.

externs/polyfill.js

@@ -13,3 +13,11 @@
 
 /** @type {string} */
 window.shakaMediaKeysPolyfill;
+
+
+/** @type {boolean} */
+navigator.emeEncryptionSchemePolyfilled;
+
+
+/** @type {boolean} */
+navigator.mediaCapabilitiesEncryptionSchemePolyfilled;

karma.conf.js

@@ -218,14 +218,6 @@ module.exports = (config) => {
       },
       'node_modules/lcevc_dec.js/dist/lcevc_dec.min.js',
 
-      // EME encryption scheme polyfill, compiled into Shaka Player, but outside
-      // of the Closure deps system, so not in shaka-player.uncompiled.js.  This
-      // is specifically the compiled, minified, cross-browser build of it.  It
-      // is necessary to use the compiled version to avoid problems on older
-      // TVs.
-      // eslint-disable-next-line @stylistic/max-len
-      'node_modules/eme-encryption-scheme-polyfill/dist/eme-encryption-scheme-polyfill.js',
-
       // load closure base, the deps tree, and the uncompiled library
       'test/test/closure-boot.js',
       'node_modules/google-closure-library/closure/goog/base.js',

lib/device/abstract_device.js

@@ -307,6 +307,13 @@ shaka.device.AbstractDevice = class {
     return false;
   }
 
+  /**
+   * @override
+   */
+  supportsCbcsWithoutEncryptionSchemeSupport() {
+    return false;
+  }
+
   /**
    * @override
    */

lib/device/chromecast.js

@@ -161,6 +161,13 @@ shaka.device.Chromecast = class extends shaka.device.AbstractDevice {
     return false;
   }
 
+  /**
+   * @override
+   */
+  supportsCbcsWithoutEncryptionSchemeSupport() {
+    return true;
+  }
+
   /**
    * Check if the current platform is Vizio TV.
    * @return {boolean}

lib/device/default_browser.js

@@ -175,6 +175,18 @@ shaka.device.DefaultBrowser = class extends shaka.device.AbstractDevice {
     return this.isWindows_.value() &&
         this.getBrowserEngine() === shaka.device.IDevice.BrowserEngine.GECKO;
   }
+
+  /**
+   * @override
+   */
+  supportsCbcsWithoutEncryptionSchemeSupport() {
+    if (this.getBrowserEngine() === shaka.device.IDevice.BrowserEngine.GECKO) {
+      const version = this.getVersion();
+      return version !== null ?
+          version >= 100 : super.supportsCbcsWithoutEncryptionSchemeSupport();
+    }
+    return super.supportsCbcsWithoutEncryptionSchemeSupport();
+  }
 };
 
 shaka.device.DeviceFactory.registerDefaultDeviceFactory(

lib/device/i_device.js

@@ -224,6 +224,11 @@ shaka.device.IDevice = class {
    * @return {boolean}
    */
   disableHEVCSupport() {}
+
+  /**
+   * @return {boolean}
+   */
+  supportsCbcsWithoutEncryptionSchemeSupport() {}
 };
 
 /**

lib/device/webos.js

@@ -205,6 +205,15 @@ shaka.device.WebOS = class extends shaka.device.AbstractDevice {
     return false;
   }
 
+  /**
+   * @override
+   */
+  supportsCbcsWithoutEncryptionSchemeSupport() {
+    const version = this.getVersion();
+    return version !== null ?
+        version >= 6 : super.supportsCbcsWithoutEncryptionSchemeSupport();
+  }
+
   /**
    * @return {boolean}
    * @private