/* * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net> * Author: Alex Yatskov <alex@foosoft.net> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ function audioGetFromUrl(url) { return new Promise((resolve, reject) => { const audio = new Audio(url); audio.addEventListener('loadeddata', () => { if (audio.duration === 5.694694 || audio.duration === 5.720718) { // Hardcoded values for invalid audio reject(new Error('Could not retrieve audio')); } else { resolve(audio); } }); audio.addEventListener('error', () => reject(audio.error)); }); } async function audioGetFromSources(expression, sources, optionsContext, createAudioObject, cache=null) { const key = `${expression.expression}:${expression.reading}`; if (cache !== null && cache.hasOwnProperty(expression)) { return cache[key]; } for (let i = 0, ii = sources.length; i < ii; ++i) { const source = sources[i]; const url = await apiAudioGetUrl(expression, source, optionsContext); if (url === null) { continue; } try { const audio = createAudioObject ? await audioGetFromUrl(url) : null; const result = {audio, url, source}; if (cache !== null) { cache[key] = result; } return result; } catch (e) { // NOP } } return {audio: null, source: null}; }