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vue使用recorder.js实现录音功能

更新时间:2020-09-24 05:12:01 作者:startmvc
关于vue使用recorder.js录音功能,供大家参考,具体内容如下**1,引入外部js文件import{HZRecorder

关于vue使用recorder.js录音功能,供大家参考,具体内容如下

**

1, 引入外部js文件

import { HZRecorder} from ‘…/…/utils/HZRecorder.js';

js文件内容


export function HZRecorder(stream, config) {
 config = config || {};
 config.sampleBits = config.sampleBits || 16; //采样数位 8, 16
 config.sampleRate = config.sampleRate || 16000; //采样率16khz

 var context = new (window.webkitAudioContext || window.AudioContext)();
 var audioInput = context.createMediaStreamSource(stream);
 var createScript = context.createScriptProcessor || context.createJavaScriptNode;
 var recorder = createScript.apply(context, [4096, 1, 1]);

 var audioData = {
 size: 0 //录音文件长度
 , buffer: [] //录音缓存
 , inputSampleRate: context.sampleRate //输入采样率
 , inputSampleBits: 16 //输入采样数位 8, 16
 , outputSampleRate: config.sampleRate //输出采样率
 , oututSampleBits: config.sampleBits //输出采样数位 8, 16
 , input: function (data) {
 this.buffer.push(new Float32Array(data));
 this.size += data.length;
 }
 , compress: function () { //合并压缩
 //合并
 var data = new Float32Array(this.size);
 var offset = 0;
 for (var i = 0; i < this.buffer.length; i++) {
 data.set(this.buffer[i], offset);
 offset += this.buffer[i].length;
 }
 //压缩
 var compression = parseInt(this.inputSampleRate / this.outputSampleRate);
 var length = data.length / compression;
 var result = new Float32Array(length);
 var index = 0, j = 0;
 while (index < length) {
 result[index] = data[j];
 j += compression;
 index++;
 }
 return result;
 }
 , encodeWAV: function () {
 var sampleRate = Math.min(this.inputSampleRate, this.outputSampleRate);
 var sampleBits = Math.min(this.inputSampleBits, this.oututSampleBits);
 var bytes = this.compress();
 var dataLength = bytes.length * (sampleBits / 8);
 var buffer = new ArrayBuffer(44 + dataLength);
 var data = new DataView(buffer);

 var channelCount = 1;//单声道
 var offset = 0;

 var writeString = function (str) {
 for (var i = 0; i < str.length; i++) {
 data.setUint8(offset + i, str.charCodeAt(i));
 }
 }

 // 资源交换文件标识符 
 writeString('RIFF'); offset += 4;
 // 下个地址开始到文件尾总字节数,即文件大小-8 
 data.setUint32(offset, 36 + dataLength, true); offset += 4;
 // WAV文件标志
 writeString('WAVE'); offset += 4;
 // 波形格式标志 
 writeString('fmt '); offset += 4;
 // 过滤字节,一般为 0x10 = 16 
 data.setUint32(offset, 16, true); offset += 4;
 // 格式类别 (PCM形式采样数据) 
 data.setUint16(offset, 1, true); offset += 2;
 // 通道数 
 data.setUint16(offset, channelCount, true); offset += 2;
 // 采样率,每秒样本数,表示每个通道的播放速度 
 data.setUint32(offset, sampleRate, true); offset += 4;
 // 波形数据传输率 (每秒平均字节数) 单声道×每秒数据位数×每样本数据位/8 
 data.setUint32(offset, channelCount * sampleRate * (sampleBits / 8), true); offset += 4;
 // 快数据调整数 采样一次占用字节数 单声道×每样本的数据位数/8 
 data.setUint16(offset, channelCount * (sampleBits / 8), true); offset += 2;
 // 每样本数据位数 
 data.setUint16(offset, sampleBits, true); offset += 2;
 // 数据标识符 
 writeString('data'); offset += 4;
 // 采样数据总数,即数据总大小-44 
 data.setUint32(offset, dataLength, true); offset += 4;
 // 写入采样数据 
 if (sampleBits === 8) {
 for (var i = 0; i < bytes.length; i++, offset++) {
 var s = Math.max(-1, Math.min(1, bytes[i]));
 var val = s < 0 ? s * 0x8000 : s * 0x7FFF;
 val = parseInt(255 / (65535 / (val + 32768)));
 data.setInt8(offset, val, true);
 }
 } else {
 for (var i = 0; i < bytes.length; i++, offset += 2) {
 var s = Math.max(-1, Math.min(1, bytes[i]));
 data.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
 }
 }

 return new Blob([data], { type: 'audio/wav' });
 }
 };
 //开始录音
 this.start = function () {
 audioInput.connect(recorder);
 recorder.connect(context.destination);
 }

 //停止
 this.stop = function () {
 recorder.disconnect();
 }

 //获取音频文件
 this.getBlob = function () {
 this.stop();
 return audioData.encodeWAV();
 }

 //回放
 this.play = function (audio) {
 var blob=this.getBlob();
 // saveAs(blob, "F:/3.wav");
 audio.src = window.URL.createObjectURL(this.getBlob());
 }

 //上传
 this.upload = function () {
 return this.getBlob()
 }

 //音频采集
 recorder.onaudioprocess = function (e) {
 audioData.input(e.inputBuffer.getChannelData(0));
 //record(e.inputBuffer.getChannelData(0));
 }

}

2、vue组件的mount中初始化调用麦克风工具


mounted() {
 this.$nextTick(() => {
 try {
 <!-- 检查是否能够调用麦克风 -->
 window.AudioContext = window.AudioContext || window.webkitAudioContext;
 navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia;
 window.URL = window.URL || window.webkitURL;
 
 audio_context = new AudioContext;
 console.log('navigator.getUserMedia ' + (navigator.getUserMedia ? 'available.' : 'not present!'));
 } catch (e) {
 alert('No web audio support in this browser!');
 }
 
 navigator.getUserMedia({audio: true}, function (stream) {
 recorder = new HZRecorder(stream)
 console.log('初始化完成');
 }, function(e) {
 console.log('No live audio input: ' + e);
 });
 })
},

3、methods 调用


 readyOriginal () {
 if (!this.isVoice) {
 <!-- 开启录音 -->
 recorder && recorder.start();
 this.isVoice = true
 } else {
 this.isVoice = false
 <!-- 结束录音 -->
 recorder && recorder.stop();
 setTimeout(()=> {
 <!-- 录音上传 -->
 var mp3Blob = recorder.upload();
 var fd = new FormData();
 fd.append('audio', mp3Blob);
 this.$http({
 header: ({
 'Content-Type': 'application/x-www-form-urlencodeed'
 }),
 method: 'POST',
 url: 'url',
 data: fd,
 withCredentials: true,
 }).then((res) => { 
 // 这里做登录拦截
 if (res.data.isLogin === false) {
 router.replace('/login');
 } else {
 if (res.data.status === 200) {
 console.log('保存成功')
 } else {
 this.returnmsg = '上传失败'
 }
 }
 })
 },1000)
 }
 },

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

vue recorder.js 录音