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import { isMobile } from '../../RossAscends-mods.js';
import { getPreviewString } from './index.js';
import { saveTtsProviderSettings } from './index.js';
export { SystemTtsProvider };
/**
* Chunkify
* Google Chrome Speech Synthesis Chunking Pattern
* Fixes inconsistencies with speaking long texts in speechUtterance objects
* Licensed under the MIT License
*
* Peter Woolley and Brett Zamir
* Modified by Haaris for bug fixes
*/
var speechUtteranceChunker = function (utt, settings, callback) {
settings = settings || {};
var newUtt;
var txt = (settings && settings.offset !== undefined ? utt.text.substring(settings.offset) : utt.text);
if (utt.voice && utt.voice.voiceURI === 'native') { // Not part of the spec
newUtt = utt;
newUtt.text = txt;
newUtt.addEventListener('end', function () {
if (speechUtteranceChunker.cancel) {
speechUtteranceChunker.cancel = false;
}
if (callback !== undefined) {
callback();
}
});
}
else {
var chunkLength = (settings && settings.chunkLength) || 160;
var pattRegex = new RegExp('^[\\s\\S]{' + Math.floor(chunkLength / 2) + ',' + chunkLength + '}[.!?,]{1}|^[\\s\\S]{1,' + chunkLength + '}$|^[\\s\\S]{1,' + chunkLength + '} ');
var chunkArr = txt.match(pattRegex);
if (chunkArr == null || chunkArr[0] === undefined || chunkArr[0].length <= 2) {
//call once all text has been spoken...
if (callback !== undefined) {
callback();
}
return;
}
var chunk = chunkArr[0];
newUtt = new SpeechSynthesisUtterance(chunk);
var x;
for (x in utt) {
if (Object.hasOwn(utt, x) && x !== 'text') {
newUtt[x] = utt[x];
}
}
newUtt.lang = utt.lang;
newUtt.voice = utt.voice;
newUtt.rate = utt.rate;
newUtt.pitch = utt.pitch;
newUtt.addEventListener('end', function () {
if (speechUtteranceChunker.cancel) {
speechUtteranceChunker.cancel = false;
return;
}
settings.offset = settings.offset || 0;
settings.offset += chunk.length;
speechUtteranceChunker(utt, settings, callback);
});
}
if (settings.modifier) {
settings.modifier(newUtt);
}
console.log(newUtt); //IMPORTANT!! Do not remove: Logging the object out fixes some onend firing issues.
//placing the speak invocation inside a callback fixes ordering and onend issues.
setTimeout(function () {
speechSynthesis.speak(newUtt);
}, 0);
};
class SystemTtsProvider {
//########//
// Config //
//########//
// Static constants for the simulated default voice
static BROWSER_DEFAULT_VOICE_ID = '__browser_default__';
static BROWSER_DEFAULT_VOICE_NAME = 'System Default Voice';
settings;
ready = false;
voices = [];
separator = ' ... ';
defaultSettings = {
voiceMap: {},
rate: 1,
pitch: 1,
};
get settingsHtml() {
if (!('speechSynthesis' in window)) {
return 'Your browser or operating system doesn\'t support speech synthesis';
}
return `<p>Uses the voices provided by your operating system</p>
<label for="system_tts_rate">Rate: <span id="system_tts_rate_output"></span></label>
<input id="system_tts_rate" type="range" value="${this.defaultSettings.rate}" min="0.1" max="2" step="0.01" />
<label for="system_tts_pitch">Pitch: <span id="system_tts_pitch_output"></span></label>
<input id="system_tts_pitch" type="range" value="${this.defaultSettings.pitch}" min="0" max="2" step="0.01" />`;
}
onSettingsChange() {
this.settings.rate = Number($('#system_tts_rate').val());
this.settings.pitch = Number($('#system_tts_pitch').val());
$('#system_tts_pitch_output').text(this.settings.pitch);
$('#system_tts_rate_output').text(this.settings.rate);
saveTtsProviderSettings();
}
async loadSettings(settings) {
// Populate Provider UI given input settings
if (Object.keys(settings).length == 0) {
console.info('Using default TTS Provider settings');
}
// iOS should only allows speech synthesis trigged by user interaction
if (isMobile()) {
let hasEnabledVoice = false;
document.addEventListener('click', () => {
if (hasEnabledVoice) {
return;
}
const utterance = new SpeechSynthesisUtterance(' . ');
utterance.volume = 0;
speechSynthesis.speak(utterance);
hasEnabledVoice = true;
});
}
// Only accept keys defined in defaultSettings
this.settings = this.defaultSettings;
for (const key in settings) {
if (key in this.settings) {
this.settings[key] = settings[key];
} else {
throw `Invalid setting passed to TTS Provider: ${key}`;
}
}
$('#system_tts_rate').val(this.settings.rate || this.defaultSettings.rate);
$('#system_tts_pitch').val(this.settings.pitch || this.defaultSettings.pitch);
// Trigger updates
$('#system_tts_rate').on('input', () => { this.onSettingsChange(); });
$('#system_tts_pitch').on('input', () => { this.onSettingsChange(); });
$('#system_tts_pitch_output').text(this.settings.pitch);
$('#system_tts_rate_output').text(this.settings.rate);
console.debug('SystemTTS: Settings loaded');
}
// Perform a simple readiness check by trying to fetch voiceIds
async checkReady() {
await this.fetchTtsVoiceObjects();
}
async onRefreshClick() {
return;
}
//#################//
// TTS Interfaces //
//#################//
fetchTtsVoiceObjects() {
if (!('speechSynthesis' in window)) {
return Promise.resolve([]);
}
return new Promise((resolve) => {
setTimeout(() => {
let voices = speechSynthesis.getVoices();
if (voices.length === 0) {
// Edge compat: Provide default when voices empty
console.warn('SystemTTS: getVoices() returned empty list. Providing browser default option.');
const defaultVoice = {
name: SystemTtsProvider.BROWSER_DEFAULT_VOICE_NAME,
voice_id: SystemTtsProvider.BROWSER_DEFAULT_VOICE_ID,
preview_url: false,
lang: navigator.language || 'en-US',
};
resolve([defaultVoice]);
} else {
const mappedVoices = voices
.sort((a, b) => a.lang.localeCompare(b.lang) || a.name.localeCompare(b.name))
.map(x => ({ name: x.name, voice_id: x.voiceURI, preview_url: false, lang: x.lang }));
resolve(mappedVoices);
}
}, 50);
});
}
previewTtsVoice(voiceId) {
if (!('speechSynthesis' in window)) {
throw new Error('Speech synthesis API is not supported');
}
let voice = null;
if (voiceId !== SystemTtsProvider.BROWSER_DEFAULT_VOICE_ID) {
const voices = speechSynthesis.getVoices();
voice = voices.find(x => x.voiceURI === voiceId);
if (!voice && voices.length > 0) {
console.warn(`SystemTTS Preview: Voice ID "${voiceId}" not found among available voices. Using browser default.`);
} else if (!voice && voices.length === 0) {
console.warn('SystemTTS Preview: Voice list is empty. Using browser default.');
}
} else {
console.log('SystemTTS Preview: Using browser default voice as requested.');
}
speechSynthesis.cancel();
const langForPreview = voice ? voice.lang : (navigator.language || 'en-US');
const text = getPreviewString(langForPreview);
const utterance = new SpeechSynthesisUtterance(text);
if (voice) {
utterance.voice = voice;
}
utterance.rate = this.settings.rate || 1;
utterance.pitch = this.settings.pitch || 1;
utterance.onerror = (event) => {
console.error(`SystemTTS Preview Error: ${event.error}`, event);
};
speechSynthesis.speak(utterance);
}
async getVoice(voiceName) {
if (!('speechSynthesis' in window)) {
return { voice_id: null, name: 'API Not Supported' };
}
if (voiceName === SystemTtsProvider.BROWSER_DEFAULT_VOICE_NAME) {
return {
voice_id: SystemTtsProvider.BROWSER_DEFAULT_VOICE_ID,
name: SystemTtsProvider.BROWSER_DEFAULT_VOICE_NAME,
};
}
const voices = speechSynthesis.getVoices();
if (voices.length === 0) {
console.warn('SystemTTS: Empty voice list, using default fallback');
return {
voice_id: SystemTtsProvider.BROWSER_DEFAULT_VOICE_ID,
name: SystemTtsProvider.BROWSER_DEFAULT_VOICE_NAME,
};
}
const match = voices.find(x => x.name == voiceName);
if (!match) {
throw new Error(`SystemTTS getVoice: TTS Voice name "${voiceName}" not found`);
}
return { voice_id: match.voiceURI, name: match.name };
}
async generateTts(text, voiceId) {
if (!('speechSynthesis' in window)) {
throw 'Speech synthesis API is not supported';
}
const silence = await fetch('/sounds/silence.mp3');
return new Promise((resolve, reject) => {
const voices = speechSynthesis.getVoices();
const voice = voices.find(x => x.voiceURI === voiceId);
const utterance = new SpeechSynthesisUtterance(text);
utterance.voice = voice;
utterance.rate = this.settings.rate || 1;
utterance.pitch = this.settings.pitch || 1;
utterance.onend = () => resolve(silence);
utterance.onerror = () => reject();
speechUtteranceChunker(utterance, {
chunkLength: 200,
}, function () {
resolve(silence);
console.log('System TTS done');
});
});
}
}
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