/**
* The copyright in this software is being made available under the BSD License,
* included below. This software may be subject to other third party and contributor
* rights, including patent rights, and no such rights are granted under this license.
*
* Copyright (c) 2013, Dash Industry Forum.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * Neither the name of Dash Industry Forum nor the names of its
* contributors may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Defines the public interface for all Key Systems (DRMs) supported
* by the player.
*
* @interface KeySystem
*/
/**
* Key system name string (e.g. 'org.w3.clearkey')
*
* @instance
* @name systemString
* @memberof KeySystem
* @readonly
* @type String
*/
/**
* Key system UUID in the form '01234567-89ab-cdef-0123-456789abcdef'
*
* @instance
* @name uuid
* @memberof KeySystem
* @readonly
* @type String
*/
/**
* The scheme ID URI for this key system in the form
* 'urn:uuid:01234567-89ab-cdef-0123-456789abcdef' as used
* in DASH ContentProtection elements
*
* @instance
* @name schemeIdURI
* @memberof KeySystem
* @readonly
* @type String
*/
/**
* Parse DRM-specific init data from the ContentProtection
* element.
*
* @function
* @name KeySystem#getInitData
* @param {Object} contentProtection the json-style contentProtection
* object representing the ContentProtection element parsed from the
* MPD XML document.
* @returns {ArrayBuffer} EME initialization data
*/
/**
* For some key systems, the CDM message contains HTTP headers that
* can be parsed by the application and attached to the license request.
* Returns a header object with key/value pairs as object properties/values
*
* @function
* @name KeySystem#getRequestHeadersFromMessage
* @param {ArrayBuffer} message the CDM message
* @returns {?Object} headers object with header names as the object property
* names and header values as the corresponding object property values. Return
* null if no such headers were found or if the mechanism is not supported by
* this key system
*/
/**
* For some key systems, the CDM message contains more than just the
* license request data. This method will pull the license request from
* the CDM message, if necessary.
*
* @function
* @name KeySystem#getLicenseRequestFromMessage
* @param message {ArrayBuffer} the CDM message
* @returns {Uint8Array} the license request message as will be passed to
* XMLHttpRequest.send()
*/
/**
* Returns a license server URL as parsed from key system initialization data (PSSH).
*
* @function
* @name KeySystem#getLicenseServerURLFromInitData
* @param initData {ArrayBuffer} the initialization data. This is just the "Data" field
* from the PSSH box definition
* @returns {?string} The license server URL or null if URL is not available in initData
*/