text: /**
   * 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.
   */
  
  /**
   * Google Widevine DRM
   *
   * @class
   * @implements MediaPlayer.dependencies.protection.KeySystem
   */
  
  import CommonEncryption from '../CommonEncryption';
  
  const uuid = 'edef8ba9-79d6-4ace-a3c8-27dcd51d21ed';
  const systemString = 'com.widevine.alpha';
  const schemeIdURI = 'urn:uuid:' + uuid;
  
  function KeySystemWidevine(config) {
  
      config = config || {};
      let instance;
      let protData = null;
      let BASE64 = config.BASE64;
  
      function init(protectionData) {
          if (protectionData) {
              protData = protectionData;
          }
      }
  
      function replaceKID(pssh, KID) {
          let pssh_array;
          let replace = true;
          let kidLen = 16;
          let pos;
          let i, j;
  
          pssh_array = new Uint8Array(pssh);
  
          for (i = 0; i <= pssh_array.length - (kidLen + 2); i++) {
              if (pssh_array[i] === 0x12 && pssh_array[i + 1] === 0x10) {
                  pos = i + 2;
                  for (j = pos; j < (pos + kidLen); j++) {
                      if (pssh_array[j] !== 0xFF) {
                          replace = false;
                          break;
                      }
                  }
                  break;
              }
          }
  
          if (replace) {
              pssh_array.set(KID, pos);
          }
  
          return pssh_array.buffer;
      }
  
      function getInitData(cp) {
          var pssh = null;
          // Get pssh from protectionData or from manifest
          if (protData && protData.pssh) {
              pssh = BASE64.decodeArray(protData.pssh).buffer;
          } else {
              pssh = CommonEncryption.parseInitDataFromContentProtection(cp, BASE64);
          }
  
          // Check if KID within pssh is empty, in that case set KID value according to 'cenc:default_KID' value
          if (pssh) {
              pssh = replaceKID(pssh, cp['cenc:default_KID']);
          }
  
          return pssh;
      }
  
      function getRequestHeadersFromMessage( /*message*/ ) {
          return null;
      }
  
      function getLicenseRequestFromMessage(message) {
          return new Uint8Array(message);
      }
  
      function getLicenseServerURLFromInitData( /*initData*/ ) {
          return null;
      }
  
      function getCDMData() {
          return null;
      }
  
      instance = {
          uuid: uuid,
          schemeIdURI: schemeIdURI,
          systemString: systemString,
          init: init,
          getInitData: getInitData,
          getRequestHeadersFromMessage: getRequestHeadersFromMessage,
          getLicenseRequestFromMessage: getLicenseRequestFromMessage,
          getLicenseServerURLFromInitData: getLicenseServerURLFromInitData,
          getCDMData: getCDMData
      };
  
      return instance;
  }
  
  KeySystemWidevine.__dashjs_factory_name = 'KeySystemWidevine';
  export default dashjs.FactoryMaker.getSingletonFactory(KeySystemWidevine); /* jshint ignore:line */
  