js-tts-wrapper
Version:
A JavaScript/TypeScript library that provides a unified API for working with multiple cloud-based Text-to-Speech (TTS) services
239 lines (238 loc) • 8.86 kB
JavaScript
import { AbstractTTSClient } from "../core/abstract-tts.js";
import * as SSMLUtils from "../core/ssml-utils.js";
import * as SpeechMarkdown from "../markdown/converter.js";
import { base64ToUint8Array } from "../utils/base64-utils.js";
import { getFetch } from "../utils/fetch-utils.js";
import { toIso639_3, toLanguageDisplay } from "../utils/language-utils.js";
const fetch = getFetch();
export class MurfTTSClient extends AbstractTTSClient {
constructor(credentials = {}) {
super(credentials);
Object.defineProperty(this, "apiKey", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
Object.defineProperty(this, "baseUrl", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
Object.defineProperty(this, "model", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
this.apiKey = credentials.apiKey || process.env.MURF_API_KEY || "";
this.baseUrl = credentials.baseURL || "https://api.murf.ai/v1";
this.model = credentials.model || "GEN2";
this.voiceId = "en-US-natalie";
this._models = [
{ id: "GEN2", features: ["streaming"] },
{ id: "FALCON", features: ["streaming"] },
];
this.sampleRate = 24000;
this.applyCredentialProperties(credentials);
}
applyCredentialProperties(credentials) {
const rawProps = credentials.properties ??
credentials.propertiesJson ??
credentials.propertiesJSON;
if (rawProps) {
let parsed = null;
if (typeof rawProps === "string") {
try {
parsed = JSON.parse(rawProps);
}
catch {
/* ignore */
}
}
else if (typeof rawProps === "object") {
parsed = rawProps;
}
if (parsed) {
for (const [key, value] of Object.entries(parsed)) {
this.setProperty(key, value);
}
}
}
}
async prepareText(text, options) {
let processedText = text;
if (options?.useSpeechMarkdown && SpeechMarkdown.isSpeechMarkdown(processedText)) {
const ssml = await SpeechMarkdown.toSSML(processedText, "w3c");
processedText = SSMLUtils.stripSSML(ssml);
}
if (SSMLUtils.isSSML(processedText)) {
processedText = SSMLUtils.stripSSML(processedText);
}
return processedText;
}
setModel(model) {
this.model = model;
}
setVoice(voiceId) {
this.voiceId = voiceId;
}
getProperty(property) {
switch (property) {
case "model":
return this.model;
case "voice":
return this.voiceId;
default:
return super.getProperty(property);
}
}
setProperty(property, value) {
switch (property) {
case "model":
this.setModel(value);
break;
case "voice":
this.setVoice(value);
break;
default:
super.setProperty(property, value);
break;
}
}
async checkCredentials() {
if (!this.apiKey)
return false;
try {
const response = await fetch(`${this.baseUrl}/speech/generate`, {
method: "POST",
headers: {
"Content-Type": "application/json",
"api-key": this.apiKey,
},
body: JSON.stringify({ voiceId: "test", text: "test", encodeAsBase64: true }),
});
return response.status !== 401;
}
catch {
return false;
}
}
getRequiredCredentials() {
return ["apiKey"];
}
async _getVoices() {
return MurfTTSClient.VOICES;
}
async _mapVoicesToUnified(rawVoices) {
return rawVoices.map((voice) => ({
id: voice.id,
name: voice.name,
gender: voice.gender,
languageCodes: [
{
bcp47: voice.language || "en-US",
iso639_3: toIso639_3(voice.language || "en-US"),
display: toLanguageDisplay(voice.language || "en-US"),
},
],
provider: "murf",
}));
}
async synthToBytes(text, options = {}) {
const preparedText = await this.prepareText(text, options);
const modelId = options.model || this.model;
const voiceId = options.voice || this.voiceId;
const isFalcon = modelId === "FALCON";
const body = {
...options.providerOptions,
voiceId,
text: preparedText,
};
if (isFalcon) {
body.model = "FALCON";
}
else {
body.encodeAsBase64 = true;
}
const url = isFalcon ? `${this.baseUrl}/speech/stream` : `${this.baseUrl}/speech/generate`;
const response = await fetch(url, {
method: "POST",
headers: {
"Content-Type": "application/json",
"api-key": this.apiKey,
},
body: JSON.stringify(body),
});
if (!response.ok) {
const errorText = await response.text();
throw new Error(`Murf API error: ${response.status} ${response.statusText} - ${errorText}`);
}
if (isFalcon) {
const arrayBuffer = await response.arrayBuffer();
this._createEstimatedWordTimings(preparedText);
return new Uint8Array(arrayBuffer);
}
const json = (await response.json());
const bytes = base64ToUint8Array(json.encodedAudio);
this._createEstimatedWordTimings(preparedText);
return bytes;
}
async synthToBytestream(text, options = {}) {
const preparedText = await this.prepareText(text, options);
const modelId = options.model || this.model;
const voiceId = options.voice || this.voiceId;
const body = {
...options.providerOptions,
voiceId,
text: preparedText,
model: modelId,
};
const response = await fetch(`${this.baseUrl}/speech/stream`, {
method: "POST",
headers: {
"Content-Type": "application/json",
"api-key": this.apiKey,
},
body: JSON.stringify(body),
});
if (!response.ok) {
const errorText = await response.text();
throw new Error(`Murf API error: ${response.status} ${response.statusText} - ${errorText}`);
}
if (!response.body) {
const bytes = await this.synthToBytes(text, options);
const readableStream = new ReadableStream({
start(controller) {
controller.enqueue(bytes);
controller.close();
},
});
return { audioStream: readableStream, wordBoundaries: [] };
}
return { audioStream: response.body, wordBoundaries: [] };
}
}
Object.defineProperty(MurfTTSClient, "VOICES", {
enumerable: true,
configurable: true,
writable: true,
value: [
{ id: "en-US-natalie", name: "Natalie", gender: "Female", language: "en-US" },
{ id: "en-US-owen", name: "Owen", gender: "Male", language: "en-US" },
{ id: "en-US-amira", name: "Amira", gender: "Female", language: "en-US" },
{ id: "en-US-daniel", name: "Daniel", gender: "Male", language: "en-US" },
{ id: "en-US-taylor", name: "Taylor", gender: "Female", language: "en-US" },
{ id: "en-US-alex", name: "Alex", gender: "Male", language: "en-US" },
{ id: "en-US-emily", name: "Emily", gender: "Female", language: "en-US" },
{ id: "en-US-ben", name: "Ben", gender: "Male", language: "en-US" },
{ id: "en-US-claire", name: "Claire", gender: "Female", language: "en-US" },
{ id: "en-US-glen", name: "Glen", gender: "Male", language: "en-US" },
{ id: "de-DE-detlef", name: "Detlef", gender: "Male", language: "de-DE" },
{ id: "es-ES-rosalyn", name: "Rosalyn", gender: "Female", language: "es-ES" },
{ id: "fr-FR-henri", name: "Henri", gender: "Male", language: "fr-FR" },
{ id: "pt-BR-thomas", name: "Thomas", gender: "Male", language: "pt-BR" },
{ id: "it-IT-giulia", name: "Giulia", gender: "Female", language: "it-IT" },
]
});