shaka-player
Version:
DASH/EME video player library
44 lines (38 loc) • 1.3 kB
JavaScript
/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.util.MediaReadyState');
goog.require('shaka.util.EventManager');
goog.require('shaka.util.Lazy');
shaka.util.MediaReadyState = class {
/**
* @param {!HTMLMediaElement} mediaElement
* @param {number} readyState
* @param {shaka.util.EventManager} eventManager
* @param {function()} callback
*/
static waitForReadyState(mediaElement, readyState, eventManager, callback) {
if (readyState == HTMLMediaElement.HAVE_NOTHING ||
mediaElement.readyState >= readyState) {
callback();
} else {
const MediaReadyState = shaka.util.MediaReadyState;
const eventName =
MediaReadyState.READY_STATES_TO_EVENT_NAMES_.value().get(readyState);
eventManager.listenOnce(mediaElement, eventName, callback);
}
}
};
/**
* @const {!shaka.util.Lazy.<!Map<number, string>>}
* @private
*/
shaka.util.MediaReadyState.READY_STATES_TO_EVENT_NAMES_ =
new shaka.util.Lazy(() => new Map([
[HTMLMediaElement.HAVE_METADATA, 'loadedmetadata'],
[HTMLMediaElement.HAVE_CURRENT_DATA, 'loadeddata'],
[HTMLMediaElement.HAVE_FUTURE_DATA, 'canplay'],
[HTMLMediaElement.HAVE_ENOUGH_DATA, 'canplaythrough'],
]));