/**
 * Copyright 2015 CANAL+ Group
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * Return AAC ES Header (hexstr form)
 *
 * @param {Number} type
 *          1 = AAC Main
 *          2 = AAC LC
 *          cf http://wiki.multimedia.cx/index.php?title=MPEG-4_Audio
 * @param {Number} frequency
 * @param {Number} chans (1 or 2)
 * @returns {string}
 */
export default function getAacesHeader(type: number, frequency: number, chans: number): string;