定时音频数据采集并发送websocket实时播放

一定时音频数据采集并发送websocket实时播放

<!DOCTYPE html>
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>定时音频数据采集</title></head><body><div><audio autoplay></audio><input onclick="startRecording()" type="button" value="录音" /><input onclick="stopRecording()" type="button" value="停止" /><input onclick="playRecording()" type="button" value="播放" /><input onclick="uploadAudio()" type="button" value="提交" /><br /><div id="recordingslist"></div></div><script type="text/javascript" src="Recorder.js"></script><script>var recorder;var audio = document.querySelector('audio');setInterval(function(){startRecording();setTimeout(function() { stopRecording(); },1200);},1200);var socket = new WebSocket('ws://172.16.39.203:8899/websocket/79'); // 替换为您的WebSocket服务器地址socket.onopen = function(event) { };      // 打开WebSocket连接时的回调函数socket.onmessage = function(event) { };   // 接收到WebSocket消息时的回调函数socket.onclose = function(event) { };     // WebSocket连接关闭时的回调函数function startRecording() {HZRecorder.get(function(rec) {  recorder = rec;recorder.start();}, {sampleBits: 16,sampleRate: 16000,bufferLength: 4096});}function stopRecording() {recorder.stop();var blob = recorder.getBlob();zh(blob);}function  zh(blob) {var reader = new FileReader();reader.onload = function(event) {var arrayBuffer = event.target.result;socket.send(arrayBuffer);};reader.readAsArrayBuffer(blob);}</script></body>
</html>

Recorder.js

(function (window) {//兼容window.URL = window.URL || window.webkitURL;navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;var HZRecorder = function (stream, config) {config = config || {};config.sampleBits = config.sampleBits || 8      //采样数位 8, 16config.sampleRate = config.sampleRate || (44100 / 6);   //采样率(1/6 44100)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 mp3ReceiveSuccess, currentErrorCallback;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) {audio.src = window.URL.createObjectURL(this.getBlob());}//上传this.upload = function (url, callback) {var fd = new FormData();fd.append("audioData", this.getBlob());var xhr = new XMLHttpRequest();if (callback) {xhr.upload.addEventListener("progress", function (e) {callback('uploading', e);}, false);xhr.addEventListener("load", function (e) {callback('ok', e);}, false);xhr.addEventListener("error", function (e) {callback('error', e);}, false);xhr.addEventListener("abort", function (e) {callback('cancel', e);}, false);}xhr.open("POST", url);xhr.send(fd);}//音频采集recorder.onaudioprocess = function (e) {audioData.input(e.inputBuffer.getChannelData(0));//record(e.inputBuffer.getChannelData(0));}};//抛出异常HZRecorder.throwError = function (message) {alert(message);throw new function () { this.toString = function () { return message; } }}//是否支持录音HZRecorder.canRecording = (navigator.getUserMedia != null);//获取录音机HZRecorder.get = function (callback, config) {if (callback) {if (navigator.getUserMedia) {navigator.getUserMedia({ audio: true } //只启用音频, function (stream) {var rec = new HZRecorder(stream, config);callback(rec);}, function (error) {switch (error.code || error.name) {case 'PERMISSION_DENIED':case 'PermissionDeniedError':HZRecorder.throwError('用户拒绝提供信息。');break;case 'NOT_SUPPORTED_ERROR':case 'NotSupportedError':HZRecorder.throwError('浏览器不支持硬件设备。');break;case 'MANDATORY_UNSATISFIED_ERROR':case 'MandatoryUnsatisfiedError':HZRecorder.throwError('无法发现指定的硬件设备。');break;default:HZRecorder.throwError('无法打开麦克风。异常信息:' + (error.code || error.name));break;}});} else {HZRecorder.throwErr('当前浏览器不支持录音功能。'); return;}}}window.HZRecorder = HZRecorder;
})(window);