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console
 (function (window) {
       var recorder = {};
    var audio = document.querySelector('audio');

    function startRecording() {
        HZRecorder.get(function (rec) {
            recorder = rec;
            recorder.start();
        });
    }


    function obtainRecord(){
        var record = recorder.getBlob();
        console.log(record);
    };

    function stopRecord(){
        recorder.stop();
    };

    function playRecord(){
        recorder.play(audio);
    };

    function isupload() {
        recorder.upload();
    }
        //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)


            //创建一个音频环境对象
            audioContext = window.AudioContext || window.webkitAudioContext;
            var context = new audioContext();

            //将声音输入这个对像
            var audioInput = context.createMediaStreamSource(stream);

            //设置音量节点
            var volume = context.createGain();
            audioInput.connect(volume);

            //创建缓存,用来缓存声音
            var bufferSize = 4096;

            // 创建声音的缓存节点,createScriptProcessor方法的
            // 第二个和第三个参数指的是输入和输出都是双声道。
            var recorder = context.createScriptProcessor(bufferSize, 2, 2);

            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();
                console.log(this.getBlob());
                return;
                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) {
            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('<a href="http://www.it165.net/edu/ewl/" target="_blank" class="keylink">浏览器</a>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<a href="http://www.it165.net/edu/ewl/" target="_blank" class="keylink">浏览器</a>不支持录音功能。');
                    return;
                }
            }
        };
        window.HZRecorder = HZRecorder;

    })(window);
<span style="white-space:pre"></span>
<audio controls autoplay></audio>
<input type="button" value="开始录音" onclick="startRecording()"/>
<input type="button" value="获取录音" onclick="obtainRecord()"/>
<input type="button" value="停止录音" onclick="stopRecord()"/>
<input type="button" value="播放录音" onclick="playRecord()"/>
<input type="button" value="上传" onclick="isupload()"/>