SPIRNGBOOT+VUE实现浏览器播放音频流并合成音频

一、语音合成支持流式返回，通过WS可以实时拿到音频流，那么我们如何在VUE项目中实现合成功能呢。语音合成应用非常广泛，如商家广告合成、驾校声音合成、新闻播报、在线听书等等场景都会用到语音合成。

二、VUE下实现合成并使用浏览器播放代码如下：

<template><div class="Login-container"><div class="allClass"><div class="titleClass"><b>在线语音合成流式版</b></div><hr/><textarea style=" width: 310px;height: 100px;">{{ttsText}}</textarea><el-button type="primary" @click="clickTts">立即合成</el-button><el-button type="primary" @click="clickWav">DOWN WAV</el-button></div></div>
</template><script src="../js_util/index.js"></script>
<script src="../js_util/index.umd.js"></script>
<script>
import * as base64 from 'js-base64'
import CryptoJS from '../js_util/crypto-js/crypto-js.js'
import AudioPlayer from '../../public/player'const audioPlayer = new AudioPlayer(""); // 播放器
export default {name: "Login",data() {return {APPID: "",API_SECRET: "",API_KEY: "",ttsWs: "", // 合成ws链接ttsText: "锦瑟无端五十弦，一弦一柱思华年。庄生晓梦迷蝴蝶，望帝春心托杜鹃。沧海月明珠有泪，蓝田日暖玉生烟。" +"此情可待成追忆，只是当时已惘然。",vcn: "xiaoyan",}},methods: {clickTts() {const url = this.getWebSocketUrl(this.API_KEY, this.API_SECRET);if ("WebSocket" in window) {this.ttsWS = new WebSocket(url);} else if ("MozWebSocket" in window) {this.ttsWS = new MozWebSocket(url);} else {alert("浏览器不支持WebSocket");return;}this.ttsWS.onopen = (e) => {console.log("链接成功...")audioPlayer.start({autoPlay: true,sampleRate: 16000,resumePlayDuration: 1000});let text = this.ttsText;let tte = document.getElementById("tte") ? "unicode" : "UTF8";let params = {common: {app_id: this.APPID,},business: {aue: "raw",auf: "audio/L16;rate=16000",vcn: this.vcn,bgs: 1,tte,},data: {status: 2,text: this.encodeText(text, tte),},};this.ttsWS.send(JSON.stringify(params));console.log("发送成功...")};this.ttsWS.onmessage = (e) => {let jsonData = JSON.parse(e.data);console.log("合成返回的数据" + JSON.stringify(jsonData));// 合成失败if (jsonData.code !== 0) {console.error(jsonData);return;}audioPlayer.postMessage({type: "base64",data: jsonData.data.audio,isLastData: jsonData.data.status === 2,});if (jsonData.code === 0 && jsonData.data.status === 2) {this.ttsWS.close();}};this.ttsWS.onerror = (e) => {console.error(e);};this.ttsWS.onclose = (e) => {console.log(e + "链接已关闭");};},getWebSocketUrl(apiKey, apiSecret) {let url = "wss://tts-api.xfyun.cn/v2/tts";let host = location.host;let date = new Date().toGMTString();let algorithm = "hmac-sha256";let headers = "host date request-line";let signatureOrigin = `host: ${host}\ndate: ${date}\nGET /v2/tts HTTP/1.1`;let signatureSha = CryptoJS.HmacSHA256(signatureOrigin, apiSecret);let signature = CryptoJS.enc.Base64.stringify(signatureSha);let authorizationOrigin = `api_key="${apiKey}", algorithm="${algorithm}", headers="${headers}", signature="${signature}"`;let authorization = btoa(authorizationOrigin);url = `${url}?authorization=${authorization}&date=${date}&host=${host}`;return url;},// 文本编码encodeText(text, type) {if (type === "unicode") {let buf = new ArrayBuffer(text.length * 4);let bufView = new Uint16Array(buf);for (let i = 0, strlen = text.length; i < strlen; i++) {bufView[i] = text.charCodeAt(i);}let binary = "";let bytes = new Uint8Array(buf);let len = bytes.byteLength;for (let i = 0; i < len; i++) {binary += String.fromCharCode(bytes[i]);}return window.btoa(binary);} else {return base64.encode(text);}},clickPcm() {},clickWav() {const blob = audioPlayer.getAudioDataBlob("wav")if (!blob) {return}let defaultName = new Date().getTime();let node = document.createElement("a");node.href = window.URL.createObjectURL(blob);node.download = `${defaultName}.wav`;node.click();node.remove();}}
}
</script><style scoped>
.Login-container {height: 100vh;background-image: linear-gradient(to bottom right, deepskyblue, darkcyan);overflow: hidden;
}.allClass {margin: 200px auto;background-color: #ffffff;width: 350px;height: 390px;padding: 20px;border-radius: 10px;
}.titleClass {margin: 20px 0;text-align: center;font-size: 24px;
}.inputOneClass {margin: 10px 0;
}.buttonClass {margin: 10px 0;text-align: right;
}
</style>

三、除了调用浏览器麦克风播报，我们还可以一键下载为WAV音频，实现效果如下！