From 64df8fc389d2204850c0d10209d39ab8644cb5e6 Mon Sep 17 00:00:00 2001
From: Dulmandakh <dulmandakh@gmail.com>
Date: Tue, 8 Mar 2022 09:58:40 +0800
Subject: [PATCH] use goog.module

---
 build/generateExterns.js            |  3 ++-
 lib/abr/ewma.js                     | 11 ++++++-----
 lib/abr/ewma_bandwidth_estimator.js | 15 ++++++++-------
 3 files changed, 16 insertions(+), 13 deletions(-)

diff --git a/build/generateExterns.js b/build/generateExterns.js
index 5460180e0a1..66c808c6fa6 100755
--- a/build/generateExterns.js
+++ b/build/generateExterns.js
@@ -39,6 +39,7 @@ if (assert.strict) {
 const esprima = require('esprima');
 const fs = require('fs');
 
+const googModule = ['goog.module', 'goog.provide'];
 // The annotations we will consider "exporting" a symbol.
 const EXPORT_REGEX = /@(?:export|exportInterface|expose)\b/;
 
@@ -127,7 +128,7 @@ function dumpNode(node) {
  */
 function isProvideNode(node) {
   return isCallNode(node) &&
-         getIdentifierString(node.expression.callee) == 'goog.provide';
+          googModule.includes(getIdentifierString(node.expression.callee));
 }
 
 
diff --git a/lib/abr/ewma.js b/lib/abr/ewma.js
index 0689cfb8959..10245f4d99d 100644
--- a/lib/abr/ewma.js
+++ b/lib/abr/ewma.js
@@ -4,23 +4,24 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-goog.provide('shaka.abr.Ewma');
+goog.module('shaka.abr.Ewma');
+goog.module.declareLegacyNamespace();
 
-goog.require('goog.asserts');
+const {assert} = goog.require('goog.asserts');
 
 
 /**
  * @summary
  * This class computes an exponentionally-weighted moving average.
  */
-shaka.abr.Ewma = class {
+exports = class Ewma {
   /**
    * @param {number} halfLife The quantity of prior samples (by weight) used
    *   when creating a new estimate.  Those prior samples make up half of the
    *   new estimate.
    */
   constructor(halfLife) {
-    goog.asserts.assert(halfLife > 0, 'expected halfLife to be positive');
+    assert(halfLife > 0, 'expected halfLife to be positive');
 
     /**
      * Larger values of alpha expire historical data more slowly.
@@ -44,7 +45,7 @@ shaka.abr.Ewma = class {
    *   new estimate.
    */
   updateAlpha(halfLife) {
-    goog.asserts.assert(halfLife > 0, 'expected halfLife to be positive');
+    assert(halfLife > 0, 'expected halfLife to be positive');
     this.alpha_ = Math.exp(Math.log(0.5) / halfLife);
   }
 
diff --git a/lib/abr/ewma_bandwidth_estimator.js b/lib/abr/ewma_bandwidth_estimator.js
index 88ac9411726..7f771dab6e1 100644
--- a/lib/abr/ewma_bandwidth_estimator.js
+++ b/lib/abr/ewma_bandwidth_estimator.js
@@ -4,9 +4,10 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-goog.provide('shaka.abr.EwmaBandwidthEstimator');
+goog.module('shaka.abr.EwmaBandwidthEstimator');
+goog.module.declareLegacyNamespace();
 
-goog.require('shaka.abr.Ewma');
+const Ewma = goog.require('shaka.abr.Ewma');
 
 
 /**
@@ -16,22 +17,22 @@ goog.require('shaka.abr.Ewma');
  * different half-lives.
  *
  */
-shaka.abr.EwmaBandwidthEstimator = class {
+exports = class EwmaBandwidthEstimator {
   /** */
   constructor() {
     /**
      * A fast-moving average.
      * Half of the estimate is based on the last 2 seconds of sample history.
-     * @private {!shaka.abr.Ewma}
+     * @private {!Ewma}
      */
-    this.fast_ = new shaka.abr.Ewma(2);
+    this.fast_ = new Ewma(2);
 
     /**
      * A slow-moving average.
      * Half of the estimate is based on the last 5 seconds of sample history.
-     * @private {!shaka.abr.Ewma}
+     * @private {!Ewma}
      */
-    this.slow_ = new shaka.abr.Ewma(5);
+    this.slow_ = new Ewma(5);
 
     /**
      * Number of bytes sampled.