/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.media.Capabilities');
/**
* @summary
* This is for capturing all media source capabilities on current platform.
* And this is for static check and can not be constructed.
*/
shaka.media.Capabilities = class {
/**
* Cache browser engine call to improve performance on some poor platforms
*
* @param {string} type
* @return {boolean}
*/
static isTypeSupported(type) {
const supportMap = shaka.media.Capabilities.MediaSourceTypeSupportMap;
if (supportMap.has(type)) {
return supportMap.get(type);
}
if (window.ManagedMediaSource) {
const currentSupport = ManagedMediaSource.isTypeSupported(type);
supportMap.set(type, currentSupport);
return currentSupport;
} else if (window.MediaSource) {
const currentSupport = MediaSource.isTypeSupported(type);
supportMap.set(type, currentSupport);
return currentSupport;
}
return false;
}
/**
* Determine support for SourceBuffer.changeType
* @return {boolean}
*/
static isChangeTypeSupported() {
return !!window.SourceBuffer &&
// eslint-disable-next-line no-restricted-syntax
!!SourceBuffer.prototype && !!SourceBuffer.prototype.changeType;
}
};
/**
* Public it for unit test, and developer could also check the support map.
* @type {!Map.<string, boolean>}
*/
shaka.media.Capabilities.MediaSourceTypeSupportMap = new Map();