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EnNoYa/ index.html

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Created January 9, 2022 09:39
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  1. @jerrybendy jerrybendy created this gist Jan 5, 2017.
    63 changes: 63 additions & 0 deletions index.html
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    <!DOCTYPE html>
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    </head>
    <body>
    <div>
    <audio controls 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" />
    </div>

    <script type="text/javascript" src="HZRecorder.js"></script>


    <script>

    var recorder;

    var audio = document.querySelector('audio');

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

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

    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>
    205 changes: 205 additions & 0 deletions HZRecorder.js
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    Original file line number Diff line number Diff line change
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    (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 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);