/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.text.WebVttGenerator');
/**
* @summary Manage the conversion to WebVTT.
* @export
*/
shaka.text.WebVttGenerator = class {
/**
* @param {!Array.<!shaka.extern.Cue>} cues
* @return {string}
*/
static convert(cues) {
let webvttString = 'WEBVTT\n\n';
for (const cue of cues) {
const webvttTimeString = (time) => {
const hours = Math.floor(time / 3600);
const minutes = Math.floor(time / 60 % 60);
const seconds = Math.floor(time % 60);
const milliseconds = Math.floor(time * 1000 % 1000);
return (hours < 10 ? '0' : '') + hours + ':' +
(minutes < 10 ? '0' : '') + minutes + ':' +
(seconds < 10 ? '0' : '') + seconds + '.' +
(milliseconds < 100 ? (milliseconds < 10 ? '00' : '0') : '') +
milliseconds;
};
webvttString += webvttTimeString(cue.startTime) + ' --> ' +
webvttTimeString(cue.endTime) + '\n';
webvttString += cue.payload + '\n\n';
}
return webvttString;
}
};