HTML5声音录制-播放功能的实现代码

html代码：

 !DOCTYPE html  html  head  meta http-equiv= Content-Type content= text/html; charset=utf-8 /  title 火星黑洞 /title  /head  body  audio autoplay /audio  input quot;startRecording() type= button value= 录音 /  input quot;stopRecording() type= button value= 停止 /  input quot;playRecording() type= button value= 播放 /  input quot;uploadAudio() type= button value= 提交 /  br /  p id= recordingslist /p  script type= text/javascript src= js/HZRecorder.js /script  script  var recorder; var audio = document.querySelector( audio  function startRecording() { HZRecorder.get(function(rec) { recorder = rec; recorder.start(); }, { sampleBits: 16, sampleRate: 16000 function stopRecording() { recorder.stop(); var blob = recorder.getBlob(); var url = URL.createObjectURL(blob); var p = document.createElement( p  var au = document.createElement( audio  var hf = document.createElement( a  au.controls = true; au.src = url; hf.href = url; hf.download = new Date().toISOString() + .wav  hf.innerHTML = hf.download; p.appendChild(au); p.appendChild(hf); recordingslist.appendChild(p); function playRecording() { recorder.play(audio); function uploadAudio() { recorder.upload( Handler1.ashx , function(state, e) { switch(state) { case uploading : //var percentComplete = Math.round(e.loaded * 100 / e.total) + %  break; case ok : //alert(e.target.responseText); alert( 上传成功  break; case error : alert( 上传失败  break; case cancel : alert( 上传被取消  break; /script  /body  /html 

HZRecorder.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, 16 config.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);

以上就是HTML5声音录制/播放功能的实现代码的详细内容，html教程

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