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public/scripts/extensions/tts/system.js
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227
public/scripts/extensions/tts/system.js
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import { isMobile } from "../../RossAscends-mods.js";
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import { getPreviewString } from "./index.js";
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export { SystemTtsProvider }
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/**
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* Chunkify
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* Google Chrome Speech Synthesis Chunking Pattern
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* Fixes inconsistencies with speaking long texts in speechUtterance objects
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* Licensed under the MIT License
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*
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* Peter Woolley and Brett Zamir
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* Modified by Haaris for bug fixes
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*/
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var speechUtteranceChunker = function (utt, settings, callback) {
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settings = settings || {};
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var newUtt;
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var txt = (settings && settings.offset !== undefined ? utt.text.substring(settings.offset) : utt.text);
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if (utt.voice && utt.voice.voiceURI === 'native') { // Not part of the spec
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newUtt = utt;
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newUtt.text = txt;
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newUtt.addEventListener('end', function () {
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if (speechUtteranceChunker.cancel) {
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speechUtteranceChunker.cancel = false;
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}
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if (callback !== undefined) {
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callback();
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}
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});
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}
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else {
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var chunkLength = (settings && settings.chunkLength) || 160;
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var pattRegex = new RegExp('^[\\s\\S]{' + Math.floor(chunkLength / 2) + ',' + chunkLength + '}[.!?,]{1}|^[\\s\\S]{1,' + chunkLength + '}$|^[\\s\\S]{1,' + chunkLength + '} ');
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var chunkArr = txt.match(pattRegex);
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if (chunkArr == null || chunkArr[0] === undefined || chunkArr[0].length <= 2) {
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//call once all text has been spoken...
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if (callback !== undefined) {
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callback();
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}
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return;
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}
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var chunk = chunkArr[0];
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newUtt = new SpeechSynthesisUtterance(chunk);
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var x;
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for (x in utt) {
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if (utt.hasOwnProperty(x) && x !== 'text') {
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newUtt[x] = utt[x];
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}
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}
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newUtt.lang = utt.lang;
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newUtt.voice = utt.voice;
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newUtt.addEventListener('end', function () {
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if (speechUtteranceChunker.cancel) {
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speechUtteranceChunker.cancel = false;
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return;
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}
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settings.offset = settings.offset || 0;
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settings.offset += chunk.length;
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speechUtteranceChunker(utt, settings, callback);
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});
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}
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if (settings.modifier) {
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settings.modifier(newUtt);
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}
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console.log(newUtt); //IMPORTANT!! Do not remove: Logging the object out fixes some onend firing issues.
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//placing the speak invocation inside a callback fixes ordering and onend issues.
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setTimeout(function () {
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speechSynthesis.speak(newUtt);
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}, 0);
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};
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class SystemTtsProvider {
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//########//
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// Config //
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//########//
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settings
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voices = []
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separator = ' ... '
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defaultSettings = {
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voiceMap: {},
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rate: 1,
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pitch: 1,
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}
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get settingsHtml() {
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if (!('speechSynthesis' in window)) {
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return "Your browser or operating system doesn't support speech synthesis";
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}
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return `<p>Uses the voices provided by your operating system</p>
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<label for="system_tts_rate">Rate: <span id="system_tts_rate_output"></span></label>
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<input id="system_tts_rate" type="range" value="${this.defaultSettings.rate}" min="0.5" max="2" step="0.1" />
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<label for="system_tts_pitch">Pitch: <span id="system_tts_pitch_output"></span></label>
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<input id="system_tts_pitch" type="range" value="${this.defaultSettings.pitch}" min="0" max="2" step="0.1" />`;
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}
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onSettingsChange() {
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this.settings.rate = Number($('#system_tts_rate').val());
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this.settings.pitch = Number($('#system_tts_pitch').val());
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$('#system_tts_pitch_output').text(this.settings.pitch);
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$('#system_tts_rate_output').text(this.settings.rate);
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console.log('Save changes');
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}
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loadSettings(settings) {
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// Populate Provider UI given input settings
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if (Object.keys(settings).length == 0) {
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console.info("Using default TTS Provider settings");
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}
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// iOS should only allows speech synthesis trigged by user interaction
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if (isMobile()) {
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let hasEnabledVoice = false;
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document.addEventListener('click', () => {
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if (hasEnabledVoice) {
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return;
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}
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const utterance = new SpeechSynthesisUtterance('hi');
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utterance.volume = 0;
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speechSynthesis.speak(utterance);
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hasEnabledVoice = true;
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});
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}
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// Only accept keys defined in defaultSettings
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this.settings = this.defaultSettings;
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for (const key in settings) {
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if (key in this.settings) {
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this.settings[key] = settings[key];
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} else {
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throw `Invalid setting passed to TTS Provider: ${key}`;
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}
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}
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$('#system_tts_rate').val(this.settings.rate || this.defaultSettings.rate);
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$('#system_tts_pitch').val(this.settings.pitch || this.defaultSettings.pitch);
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$('#system_tts_pitch_output').text(this.settings.pitch);
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$('#system_tts_rate_output').text(this.settings.rate);
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console.info("Settings loaded");
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}
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async onApplyClick() {
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return
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}
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//#################//
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// TTS Interfaces //
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//#################//
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fetchTtsVoiceIds() {
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if (!('speechSynthesis' in window)) {
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return [];
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}
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return speechSynthesis
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.getVoices()
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.sort((a, b) => a.lang.localeCompare(b.lang) || a.name.localeCompare(b.name))
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.map(x => ({ name: x.name, voice_id: x.voiceURI, preview_url: false, lang: x.lang }));
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}
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previewTtsVoice(voiceId) {
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if (!('speechSynthesis' in window)) {
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throw 'Speech synthesis API is not supported';
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}
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const voice = speechSynthesis.getVoices().find(x => x.voiceURI === voiceId);
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if (!voice) {
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throw `TTS Voice name ${voiceName} not found`
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}
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speechSynthesis.cancel();
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const text = getPreviewString(voice.lang);
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const utterance = new SpeechSynthesisUtterance(text);
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utterance.voice = voice;
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utterance.rate = 1;
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utterance.pitch = 1;
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speechSynthesis.speak(utterance);
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}
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async getVoice(voiceName) {
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if (!('speechSynthesis' in window)) {
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return { voice_id: null }
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}
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const voices = speechSynthesis.getVoices();
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const match = voices.find(x => x.name == voiceName);
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if (!match) {
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throw `TTS Voice name ${voiceName} not found`
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}
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return { voice_id: match.voiceURI, name: match.name };
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}
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async generateTts(text, voiceId) {
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if (!('speechSynthesis' in window)) {
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throw 'Speech synthesis API is not supported';
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}
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const silence = await fetch('/sounds/silence.mp3');
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return new Promise((resolve, reject) => {
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const voices = speechSynthesis.getVoices();
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const voice = voices.find(x => x.voiceURI === voiceId);
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const utterance = new SpeechSynthesisUtterance(text);
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utterance.voice = voice;
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utterance.rate = this.settings.rate || 1;
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utterance.pitch = this.settings.pitch || 1;
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utterance.onend = () => resolve(silence);
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utterance.onerror = () => reject();
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speechUtteranceChunker(utterance, {
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chunkLength: 200,
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}, function () {
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//some code to execute when done
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resolve(silence);
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console.log('System TTS done');
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});
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});
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}
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}
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