h5聲音錄制/播放
阿新 • • 發佈：2018-04-28
download 字節數 float sele {} tput 數據傳輸 ID sampler 
html代碼：
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>火星黑洞</title> </head> <body> <div> <audio autoplay></audio> <View Codeinput onclick="startRecording()" type="button" value="錄音" /> <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="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 div = document.createElement(‘div‘); 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; div.appendChild(au); div.appendChild(hf); recordingslist.appendChild(div); } 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("上傳成功"); break; case ‘error‘: alert("上傳失敗"); break; case ‘cancel‘: alert("上傳被取消"); 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 //采樣數位 8, 16 config.sampleRate = config.sampleRate || (44100 / 6); //采樣率(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 //錄音文件長度 , buffer: [] //錄音緩存 , inputSampleRate: context.sampleRate //輸入采樣率 , inputSampleBits: 16 //輸入采樣數位 8, 16 , outputSampleRate: config.sampleRate //輸出采樣率 , oututSampleBits: config.sampleBits //輸出采樣數位 8, 16 , input: function (data) { this.buffer.push(new Float32Array(data)); this.size += data.length; } , compress: function () { //合並壓縮 //合並 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; } //壓縮 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;//單聲道 var offset = 0; var writeString = function (str) { for (var i = 0; i < str.length; i++) { data.setUint8(offset + i, str.charCodeAt(i)); } } // 資源交換文件標識符 writeString(‘RIFF‘); offset += 4; // 下個地址開始到文件尾總字節數,即文件大小-8 data.setUint32(offset, 36 + dataLength, true); offset += 4; // WAV文件標誌 writeString(‘WAVE‘); offset += 4; // 波形格式標誌 writeString(‘fmt ‘); offset += 4; // 過濾字節,一般為 0x10 = 16 data.setUint32(offset, 16, true); offset += 4; // 格式類別 (PCM形式采樣數據) data.setUint16(offset, 1, true); offset += 2; // 通道數 data.setUint16(offset, channelCount, true); offset += 2; // 采樣率,每秒樣本數,表示每個通道的播放速度 data.setUint32(offset, sampleRate, true); offset += 4; // 波形數據傳輸率 (每秒平均字節數) 單聲道×每秒數據位數×每樣本數據位/8 data.setUint32(offset, channelCount * sampleRate * (sampleBits / 8), true); offset += 4; // 快數據調整數 采樣一次占用字節數 單聲道×每樣本的數據位數/8 data.setUint16(offset, channelCount * (sampleBits / 8), true); offset += 2; // 每樣本數據位數 data.setUint16(offset, sampleBits, true); offset += 2; // 數據標識符 writeString(‘data‘); offset += 4; // 采樣數據總數,即數據總大小-44 data.setUint32(offset, dataLength, true); offset += 4; // 寫入采樣數據 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‘ }); } }; //開始錄音 this.start = function () { audioInput.connect(recorder); recorder.connect(context.destination); } //停止 this.stop = function () { recorder.disconnect(); } //獲取音頻文件 this.getBlob = function () { this.stop(); return audioData.encodeWAV(); } //回放 this.play = function (audio) { audio.src = window.URL.createObjectURL(this.getBlob()); } //上傳 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); } //音頻采集 recorder.onaudioprocess = function (e) { audioData.input(e.inputBuffer.getChannelData(0)); //record(e.inputBuffer.getChannelData(0)); } }; //拋出異常 HZRecorder.throwError = function (message) { alert(message); throw new function () { this.toString = function () { return message; } } } //是否支持錄音 HZRecorder.canRecording = (navigator.getUserMedia != null); //獲取錄音機 HZRecorder.get = function (callback, config) { if (callback) { if (navigator.getUserMedia) { navigator.getUserMedia( { audio: true } //只啟用音頻 , function (stream) { var rec = new HZRecorder(stream, config); callback(rec); } , function (error) { switch (error.code || error.name) { case ‘PERMISSION_DENIED‘: case ‘PermissionDeniedError‘: HZRecorder.throwError(‘用戶拒絕提供信息。‘); break; case ‘NOT_SUPPORTED_ERROR‘: case ‘NotSupportedError‘: HZRecorder.throwError(‘瀏覽器不支持硬件設備。‘); break; case ‘MANDATORY_UNSATISFIED_ERROR‘: case ‘MandatoryUnsatisfiedError‘: HZRecorder.throwError(‘無法發現指定的硬件設備。‘); break; default: HZRecorder.throwError(‘無法打開麥克風。異常信息:‘ + (error.code || error.name)); break; } }); } else { HZRecorder.throwErr(‘當前瀏覽器不支持錄音功能。‘); return; } } } window.HZRecorder = HZRecorder; })(window);View Code
參考鏈接：https://www.cnblogs.com/ldlx-mars/p/8490410.html
h5聲音錄制/播放